JP2003076427A - Pressure adjusting method for proportional solenoid control valve, and device thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately adjust the pressure of a proportional solenoid control valve in a short time independently of existence of an individual difference of the proportional solenoid control valve when testing a pressure control of the proportional solenoid control valve and to provide a device for the same method. SOLUTION: In this adjusting device for the proportional solenoid control valve 10, when the real pressure of the supplying oil pressure is less than a target pressure, a hydraulic output sensor 35 detects the real pressure before an adjustment and the real pressure after the adjustment, and a computing control device 38 computes a deviation between them. The computing control device 38 obtains a change quantity of the real pressure in relation to the unit adjustment quantity based on the individual difference with the described differential pressure and the adjustment quantity. The computing control device 38 obtains a new adjustment quantity on the basis of the change quantity and the deviation after the adjustment, and a screw driving device 31 operates an adjusting screw 14 for turning at the new adjustment quantity to adjust the elastic force of an adjusting spring 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for testing a proportional solenoid control valve.

[0002]

2. Description of the Related Art Conventionally, a proportional solenoid control valve is subjected to various pressure adjustment tests before being shipped. As one of the pressure adjustment tests, a test current Is of a predetermined value is applied to a solenoid under the condition that a pressure oil having a predetermined supply oil pressure Pa is supplied to a supply port by using an adjusting device, and a discharge is performed. There is a test that adjusts the spring force of the pressure adjusting spring by rotating the adjusting screw so that the pressure of the pressure oil discharged from the port becomes the determined discharge pressure (theoretical pressure) Ps.

FIG. 4 shows a flowchart of the test processing operation performed by the adjusting device. In FIG. 4, step S1
In 01, the adjusting device determines the content N of the adjustment counter.
Is set to "0", the process proceeds to step S102, the pressure oil having a predetermined supply oil pressure Pa is supplied to the supply port of the proportional solenoid control valve, and the test current having a predetermined value is supplied to the solenoid of the proportional solenoid control valve. Energize Is.

Subsequently, the adjusting device proceeds to step S103, and under the condition of the supply oil pressure Pa, the pressure of the pressure oil discharged from the discharge port with respect to the test current Is (actual pressure Pn).
To detect. When the actual pressure Pn is detected, the adjusting device compares the actual pressure Pn with the previously stored theoretical pressure Ps in step S104, and checks whether the actual pressure Pn is the theoretical pressure Ps.

When it is determined in step S104 that the actual pressure Pn is the theoretical pressure Ps, the adjusting device moves to step S105, and the proportional solenoid control valve is said to have been able to adjust the pressure by the pressure adjusting spring. After making a determination, the proportional electromagnetic control valve is removed from the adjusting device, and various processing (OK processing) such as transporting the proportional electromagnetic control valve to a predetermined place as a non-defective product is performed, and then the processing is ended. Then, the adjusting device prepares for the next test of the new proportional electromagnetic control valve.

On the other hand, in step S104, the actual pressure P
When it is determined that n is not the theoretical pressure Ps, the adjusting device
Then, the process proceeds to step S106. In step S106,
The adjusting device checks whether or not the content N of the test number counter is a preset specified number of adjustments Ns. And the content N
Is less than the prescribed number of adjustments Ns, the adjusting device performs step S
Move to 107. In step S107, the adjusting device obtains the deviation ΔP (= Ps−Pn) between the theoretical pressure Ps and the previously obtained actual pressure Pn. Subsequently, the adjusting device
After shifting to step S108, the adjustment amount Q of the spring force of the adjustment spring with respect to the deviation ΔP is obtained from the map table of the adjustment amount Q with respect to the deviation ΔP prepared in advance, and then the turning amount θ of the adjustment screw with respect to the obtained adjustment amount Q. Is similarly obtained from the map table of the rotation amount θ with respect to the adjustment amount Q prepared in advance.

When the rotation amount θ is obtained, the adjusting device moves to step S109 and rotates the adjusting screw by the obtained rotation amount θ. The rotation of the adjusting screw is performed by the rotation control of the stepping motor by the adjusting device, for example.

When the adjustment of the adjusting screw is completed, the adjusting device adds "1" to the content N of the test number counter in step S110, and then, in step S102.
Then, the adjusted test is conducted in the same manner as described above. That is, the adjustment of the spring force of the adjustment spring is repeated until the predetermined standard is met (the actual pressure Pn becomes the ideal pressure Ps), and the test ends.

The number of adjustments is the specified number of adjustments Ns.
If the actual pressure Pn does not reach the ideal pressure Ps even if it becomes, the adjusting device performs step S10.
In step 6, it is determined that the content N of the test number counter has reached the specified adjustment number Ns, and the process proceeds to step S111. In step S111, the adjusting device determines that the proportional electromagnetic control valve cannot adjust the pressure even by adjusting the pressure adjusting spring, and removes the proportional electromagnetic control valve from the adjusting device and conveys it to a predetermined location as a defective product. After performing various processes (NG process) such as the above, the process ends. Then, the adjusting device prepares for the next test of the new proportional electromagnetic control valve.

[0010]

By the way, in the above-mentioned conventional adjusting device, the adjustment amount Q of the spring with respect to the deviation ΔP.
Was obtained from a map table prepared in advance.
This map table is standardized map data of the proportional solenoid control valve as a whole, and the adjustment amount Q due to the individual difference of each proportional solenoid control valve is not taken into consideration.

Therefore, if there is an individual difference in the proportional solenoid control valve to be tested, it cannot be compensated by the map table, and the spring force cannot be adjusted well, so that it has to be adjusted many times. As a result, in the adjusting device, there is a problem that the adjusting work time for applying one proportional solenoid control valve becomes long and the work efficiency is lowered. Therefore, it is conceivable to reduce the value of the specified adjustment times Ns, but most of the proportional solenoid control valves with large individual differences exceed the specified adjustment times Ns and are disposed as defective products, which causes a problem that the product yield is deteriorated. .

The present invention has been made to solve the above problems, and its purpose is to perform a pressure adjustment test of a proportional electromagnetic control valve in a short time regardless of whether there is an individual difference in the proportional electromagnetic control valve. And highly accurate pressure adjustment of a proportional solenoid control valve, and its provision.

[0013]

According to a first aspect of the present invention, there is provided a deviation between a discharge pressure of a discharge fluid and a target pressure with respect to a supply pressure of a predetermined supply fluid when energized with a predetermined test current. Based on the adjustment amount of the elastic force of the elastic member to reach the target pressure, the elastic force of the elastic member is adjusted by the obtained adjustment amount, and the test current is supplied to supply a predetermined supply pressure of the supply fluid. In the pressure adjusting method of the proportional solenoid control valve for adjusting the discharge pressure of the discharge fluid to the target pressure, the discharge pressure of the discharge fluid and the target pressure with respect to the supply pressure of the supply fluid when the test current is applied. Along with obtaining the adjusted deviation, the differential pressure between the adjusted delivery pressure and the adjusted delivery pressure is determined, and the change amount of the delivery pressure relative to the unit adjustment amount based on the individual difference is calculated from the pressure difference and the adjustment amount, So Search of a new adjustment amount based change amount and the deviation after the adjustment, and the gist that to adjust the elastic force of the elastic member at the determined new adjustment amount.

According to a second aspect of the present invention, in the pressure adjusting method for the proportional electromagnetic control valve according to the first aspect, the change amount of the discharge pressure with respect to the unit adjustment amount based on the individual difference is the adjustment amount of the differential pressure. The gist is that the new adjustment amount is a value obtained by dividing the adjusted deviation by the change amount.

The invention according to claim 3 is the same as claim 1 or 2.
In the pressure adjusting method for a proportional electromagnetic control valve described in (3), the elastic member is provided between a spool provided on the valve body portion and an adjusting screw screwed to the valve body portion, and the spool is provided on the solenoid portion side. It is an adjustment spring for elastically pressing, and the gist is that the adjustment amount and the new adjustment amount are rotation amounts of the adjustment screw.

According to a fourth aspect of the present invention, a test current is applied to the solenoid to move the spool provided on the valve body to a position where the spool balances with the elastic force of the elastic member to supply a supply fluid having a predetermined pressure. Based on the deviation between the discharge pressure of the discharge fluid discharged from the discharge port when it is supplied to the port and the predetermined target pressure, the adjustment amount of the elastic force of the elastic member for achieving the target pressure is calculated, and the adjustment amount is calculated. The adjusting screw for adjusting the elastic force of the elastic member is rotated by a screw driving device to adjust the elastic force, and the test current is passed to discharge a predetermined supply pressure of the supply fluid. In a pressure adjusting device for a proportional solenoid control valve that adjusts the discharge pressure of a fluid to a target pressure, a deviation calculating means for obtaining a adjusted deviation between the discharge pressure of the adjusted discharge fluid and the target pressure, and A change amount calculating means for obtaining a difference pressure between the discharge pressure before adjustment and the discharge pressure after adjustment, and for obtaining a change amount of the discharge pressure with respect to a unit adjustment amount based on the individual difference from the difference pressure and the adjustment amount, and the change amount And the adjustment amount calculating means for obtaining a new adjustment amount based on the adjusted deviation.

According to a fifth aspect of the present invention, in the pressure adjusting device for a proportional solenoid control valve according to the fourth aspect, the change amount calculating means divides the differential pressure by the adjustment amount to obtain a unit based on the individual difference. The amount of change of the discharge pressure with respect to the adjustment amount is obtained, and the adjustment amount calculation means obtains a new adjustment amount by dividing the adjusted deviation obtained by the deviation calculation means by the variation amount. Use as a summary.

(Operation) According to the first or second aspect of the present invention, when the discharge pressure of the discharge fluid does not reach the target pressure with respect to the test current and the supply pressure of the supply fluid having predetermined values, first, The pressure difference between the discharge pressure before adjustment and the discharge pressure after adjustment is calculated. Then, the change amount of the discharge pressure with respect to the unit adjustment amount based on the individual difference is obtained from the differential pressure and the adjustment amount,
A new adjustment amount is obtained based on the change amount and the adjusted deviation, and the elastic force of the elastic member is adjusted by the new adjustment amount. As a result, the elastic force can be adjusted based on the individual difference of the elastic member.

According to the third aspect of the invention, the adjusting spring is provided between the spool provided on the valve body and the adjusting screw screwed to the valve body. The elastic force of the adjusting spring freely changes depending on the amount of rotation of the adjusting screw.

According to the invention described in claim 4 or 5, when the discharge pressure of the discharge fluid with respect to the supply fluid does not reach the target pressure, first, the deviation calculation means is used to adjust the discharge pressure before and after the adjustment. Discharge pressure is required. Then, the change amount calculating means obtains a differential pressure between the discharge pressure before the adjustment and the discharge pressure after the adjustment, and obtains the change amount of the discharge pressure with respect to the unit adjustment amount based on the individual difference from the differential pressure and the adjustment amount. . The adjustment amount calculation means obtains a new adjustment amount based on the change amount and the adjusted deviation, and the screw drive device adjusts the elastic force of the elastic member by the new adjustment amount. As a result, the pressure device of the proportional electromagnetic control valve can adjust the elastic force based on the individual difference of the elastic member.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment in which the present invention is embodied in a proportional electromagnetic control valve will be described below with reference to FIGS. 1, 2 and 3.

As shown in FIG. 1, the proportional electromagnetic control valve 10 comprises a valve body portion 10a and a solenoid portion 10b. The valve body portion 10a includes a valve sleeve 11, a spool 12, an adjusting spring 13 as an elastic member, an adjusting screw 14, and the like.

The valve sleeve 11 has a substantially cylindrical shape, and a supply port 16 for supplying oil as a supply fluid and a discharge port for discharging oil as a discharge fluid having an adjusted output pressure on its peripheral surface. 17 are provided. Supply port 16
The supplied oil is discharged from the discharge port 17 through the inside of the valve sleeve 11, and the oil pressure of the discharged oil can be adjusted by the amount of the oil supplied to the supply port 16.

A spool 12 is inserted inside the valve sleeve 11. The spool 12 is accommodated inside the valve sleeve 11 so as to be reciprocally slidable in the axial direction. When the spool 12 reciprocates in the axial direction inside the valve sleeve 11, the opening area of the supply port 16 is changed. . Therefore, by adjusting the position of the spool 12 in the valve sleeve 11, the amount of oil supplied from the supply port 16 is adjusted and the oil pressure of the oil discharged from the discharge port 17 is adjusted.

An adjusting screw 14 is screwed into the tip portion (left side in FIG. 1) of the valve sleeve 11, and the tip portion (left side end portion in FIG. 1) of the spool 12 is with respect to the adjusting screw 14. It is elastically supported via the adjusting spring 13. A base end portion (a right end portion in FIG. 1) of the spool 12 has a shaft 2 which will be described later.
7 is abutted.

The spool 12 whose base end is in contact with the shaft 27 is pressed toward the base end by the elastic force of the adjusting spring 13. That is, the elastic force of the adjusting spring 13 is adjusted by rotating the adjusting screw 14 and adjusting the screwing position.

The solenoid portion 10b is provided with a bottomed cylindrical case main body 21, and inside the case main body 21, a bobbin 24 around which an exciting coil 23 having a cylindrical core 22 fixedly mounted is wound is disposed. . Then, the exciting coil 23 is energized from the outside through the connector 25 attached to the outside of the case body 21.

A shaft 27 is supported in the cylinder of the core 22 via a bearing 26 so as to be movable in the axial direction. The tip of the shaft 27 is brought into contact with the base end of the spool 12, and the spool 1 is pressed by the adjusting spring 13 thereof.
Supports 2.

A substantially disk-shaped plunger 28 is fixed to the base end of the shaft 27. When the exciting coil 23 is energized, the plunger 28 is attracted to the core 22 by an electromagnetic force. That is, the shaft 27 moves in the front end direction (leftward). At this time, the shaft 27 resists the elastic force of the adjusting spring 13 and the spool 1
Press 2 to the left and move the spool to a position that balances the elastic force.

More specifically, the propulsive force of the shaft 27 is proportional to the value of the electric current supplied to the exciting coil 23. The larger the electric current value, the pressing force (propulsive force) that pushes the spool 12 to the left. Is big. Therefore, the position of the spool 12 can be adjusted, that is, the opening area of the supply port 16 can be adjusted by controlling the current value to be applied.

Further, by rotating the adjusting screw 14 and adjusting the screwing position thereof to adjust the elastic force of the adjusting spring 13, the position of the spool 12 with respect to the current value to be supplied is adjusted.

Therefore, the spool 12 is applied with two forces opposed to each other in the axial direction thereof, and its position (supply port 1
The opening area 6) is determined by the balance between the elastic force of the adjusting spring 13 and the electromagnetic force generated by the energization of the exciting coil 23.

Next, the electrical construction of the adjusting device for the pressure adjusting test performed before shipment of the proportional electromagnetic control valve 10 constructed as described above will be described with reference to FIG. The adjustment device includes a screw drive device 31, a hydraulic pressure supply device 32, a power supply device 33, a hydraulic pressure input sensor 34, a hydraulic pressure output sensor 35, a rotation angle detection sensor 36, a current detection sensor 37, and a calculation control device 38.

The screw driving device 31 includes a step motor, and adjusts and adjusts the screwing position of the adjusting screw 14 by rotating the adjusting screw 14 screwed on the valve sleeve 11 forward and backward by the step motor. The elastic force of the spring 13 is adjusted. The rotation control of the screw drive device 31 is performed based on the control signal of the arithmetic and control unit 38. The hydraulic pressure supply device 32 includes an electromagnetic switching valve, and switches the valve to supply / shut off the pressure oil supplied to the supply port 16 of the valve sleeve 11. The switching control of the hydraulic pressure supply device 32 is performed based on the control signal of the arithmetic and control unit 38. Power supply 3
Reference numeral 3 denotes a power supply device for supplying a test current having a predetermined current value to the exciting coil 23, and power is supplied based on a control signal from the arithmetic and control unit 38.

The hydraulic pressure input sensor 34 corresponds to the supply port 1
The pressure Pa of the pressure oil supplied to 6 (supply oil pressure) Pa is detected, and the detection signal is output to the arithmetic and control unit 38. The hydraulic pressure output sensor 35 detects the pressure (actual pressure) Pn of the pressure oil discharged from the discharge port 17, and outputs the detection signal to the arithmetic and control unit 38. The rotation angle detection sensor 36 is
The rotation amount θ of the adjusting screw 14 that is rotationally adjusted by the screw driving device 31 is detected, and the detection signal is output to the arithmetic and control unit 38. The current detection sensor 37 detects the current value I of the test current supplied to the exciting coil 23 by the power supply device 33, and outputs the detection signal to the arithmetic and control unit 38.

The arithmetic and control unit 38 includes a CPU 41 and a ROM.
42, a RAM 43, an input circuit 44, and an output circuit 45. The CPU 41 executes various calculations according to the control program for testing stored in the ROM 42.
That is, the CPU 41 inputs the detection signals from the sensors 34 to 37 via the input circuit 44 according to the control program, and calculates the supply oil pressure Pa, the actual pressure Pn, the rotation amount θ, and the current value I. Further, the CPU 41 outputs a control signal to each of the devices 31 to 33 through the output circuit 45 according to the control program.

Next, the processing operation for the test of the CPU 41 will be described with reference to the flowcharts shown in FIGS. When the test by the adjusting device is started in a state where the proportional electromagnetic control valve 10 to be tested is set in the adjusting device, in step S51, the CPU 41 sets the content N of the test number counter in the storage area pre-allocated to the RAM 43. After setting to "0", the process proceeds to step S52. Step S5
2, the CPU 41 outputs a control signal to the hydraulic pressure supply device 32 and the power supply device 33 to output the proportional electromagnetic control valve 10.
The supply port 16 is supplied with pressure oil having a predetermined supply oil pressure Pa, and the exciting coil 23 is energized with a test current Is having a predetermined value.

Subsequently, the CPU 41 proceeds to step S53, and the discharge port 17 under the condition that the pressure oil to be supplied is the supply oil pressure Pa and the test current Is to be conducted is a predetermined value.
The actual pressure Pn of the pressure oil discharged from the
It detects based on the detection signal from. At this time, CPU4
1 receives the detection signals from the hydraulic pressure input sensor 34 and the current detection sensor 37, and checks whether the pressure oil supplied by the test is performed under the conditions that the supply oil pressure Pa and the test current Is to be conducted are predetermined values. is doing.

When the detection of the actual pressure Pn is completed, the CPU 4
1 moves to step S54, and the actual pressure Pn and RO
The actual pressure P is compared with the target pressure Pop stored in M42.
It is checked whether n and the target pressure Pop match.
The target pressure Pop is an expected value under which the proportional electromagnetic control valve 10 should be discharged from the discharge port 17, and corresponds to the theoretical pressure Ps described in the conventional art. .

When it is determined in step S54 that the actual pressure Pn and the target pressure Pop match, C
The PU 41 moves to step S55, the proportional solenoid control valve 10 judges that the pressure adjustment by the adjusting spring 13 is not necessary, outputs a control signal to the hydraulic pressure supply device 32 and the power supply device 33, and outputs pressure oil to the supply port 16. Is cut off and the energization to the exciting coil 23 is stopped. continue,
Various processing (OK processing) such as removing the proportional electromagnetic control valve 10 from the adjusting device and transporting it to a predetermined place as a good product
After that, the test of the proportional electromagnetic control valve 10 is finished. Then, the adjusting device prepares for the next test of the new proportional electromagnetic control valve 10.

On the other hand, in step S54, the actual pressure P
If it is determined that n does not match the target pressure Pop, C
The PU 41 moves to step S56. In step S56, the CPU 41 obtains a deviation ΔP1 (= Pop-Pn) between the target pressure Pop and the actual pressure Pn. Next, CP
U41 proceeds to step S57, and a deviation Δ of the entire product of the proportional electromagnetic control valve in which the adjustment amount K1 of the elastic force of the adjustment spring 13 with respect to the deviation ΔP1 is preliminarily tested or theoretically calculated.
It is obtained from the map table of the adjustment amount K1 for P1. This map table is stored in the ROM 42 in advance. Further, in step S57, the CPU 41
After obtaining the adjustment amount K1 for the deviation ΔP1, the rotation amount θ of the adjustment screw 14 with respect to the adjustment amount K1 is obtained. C
The PU 41 obtains the rotation amount θ of the adjustment screw 14 with respect to the adjustment amount K1 from a map table of the rotation amount θ with respect to the adjustment amount K1 which is preliminarily tested or theoretically calculated, and this map table is stored in the ROM 42 in advance. ing.

When the rotation amount θ is obtained, the CPU 41 proceeds to step S58 and outputs a control signal to the screw driving device 31 to drive the step motor to obtain the obtained rotation amount θ.
Only the adjusting screw 14 is rotated. At this time, the CPU 41
Receives a detection signal from the rotation angle detection sensor 36 and confirms whether the adjustment screw 14 has actually rotated by the rotation amount θ. If the turning amount θ is a positive value, the adjusting screw 14 is turned clockwise by “θ”, and if the turning amount θ is a negative value, the adjusting screw 14 is turned counterclockwise by “θ”. It is designed to move. Therefore, the elastic force of the adjustment spring 13 is adjusted to be stronger or weakened to the contrary depending on the rotating direction.

When the adjusting screw 14 is turned by the turning amount θ, the CPU 41 increments the content N of the test number counter by "1" in step S59 on the assumption that the first adjusting work is completed. Subsequently, the CPU 41 discharges the pressure oil after the adjustment screw 14 is rotated by the rotation amount θ in step S60, under the condition that the supply oil pressure Pa of the pressure oil to be supplied and the test current Is to be conducted are predetermined values. Port 17
The actual pressure Pn of the pressure oil discharged from Pn (this is Pn2 as the adjusted actual pressure, and the actual pressure before that is Pn2 for convenience of description.
n1) is detected based on the detection signal from the hydraulic pressure output sensor 35. That is, the CPU 41 controls the adjustment spring 13
The actual pressure Pn2 of the pressure oil discharged from the discharge port 17 after adjusting the elastic force is detected.

Then, in step S61, the CPU
Reference numeral 41 checks whether or not the adjusted actual pressure Pn2 and the target pressure Pop match. Then, in step S61
When it is determined that the adjusted actual pressure Pn2 and the target pressure Pop match with each other, the CPU 41 proceeds to step S55 described above, and the proportional electromagnetic control valve 10 determines that the pressure adjustment by the adjustment spring 13 is unnecessary. Then, after the proportional electromagnetic control valve 10 is removed from the adjusting device and various kinds of processing (OK processing) such as transporting it to a predetermined place as a non-defective product, the test of the proportional electromagnetic control valve 10 is finished. Then, the adjusting device prepares for the next test of the new proportional electromagnetic control valve 10.

On the other hand, when it is determined in step S61 that the adjusted actual pressure Pn2 and the target pressure Pop do not match, the CPU 41 proceeds to step S62. In step S62, the CPU 41 causes the content N of the test counter to be the predetermined adjustment count Ns (N in the present embodiment).
Check if s = 3). When the content N is less than the specified adjustment count Ns, the CPU 41 performs step S63.
Move on to.

In step S63, the CPU 41 obtains an adjusted deviation ΔP2 (= Pop-Pn2) between the target pressure Pop and the adjusted actual pressure Pn2. Subsequently, the CPU 41 proceeds to step S64, and the differential pressure ΔPd (= the difference between the adjusted actual pressure Pn2 and the previous actual pressure Pn1).
Pn2-Pn1) is calculated. In other words, the CPU 41 rotates the adjusting screw 14 by the rotation amount θ (for convenience of explanation, this rotation amount θ is referred to as the rotation amount θ1 previously performed for the adjustment) to adjust the pressure (difference). Pressure ΔPd)
Ask for.

The CPU 41 shifts to step S65 and changes the discharge pressure W (=) with respect to the unit screw rotation amount based on the individual difference in the adjusting spring 13 of the proportional electromagnetic control valve 10.
ΔPd / θ1 = (Pn2-Pn1) / θ1) is calculated.
Subsequently, the CPU 41 proceeds to step S66, and adjusts the deviation ΔP2 (= P
op-Pn2) and the change amount W (= ΔPd / θ1) with respect to the unit screw rotation amount obtained in step S65, a new rotation amount θ (= θ2 = ΔP2 / W) based on the individual difference is obtained.

When a new rotation amount θ (= θ2) is obtained, the CPU 41 proceeds to step S67 and moves the adjustment screw 14 through the screw drive device 31 by the obtained rotation amount θ2.
Rotate. That is, the pressure adjustment is made in consideration of individual differences. Subsequently, the CPU 41 replaces the data of the rotation amount θ2 with the data of the previous rotation amount θ1 in step S68.
After replacing the data of the adjusted actual pressure Pn2 with the data of the previous actual pressure Pn1, the process returns to step S59.

That is, after that, the adjusting device performs the pressure adjustment test by obtaining the rotation amount θ2 based on the individual difference of the proportional electromagnetic control valve 10. The number of adjustments is
That is, when the content N of the test number counter cannot be adjusted even when it reaches the specified number of adjustments Ns, the CPU 41 proceeds to step S69 and determines that the proportional electromagnetic control valve 10 is a defective product that does not meet a predetermined standard. A control signal is output to the hydraulic pressure supply device 32 and the power supply device 33 to cut off the supply of the pressure oil to the supply port 16 and stop the energization of the exciting coil 23. Subsequently, after the proportional electromagnetic control valve 10 is removed from the adjusting device and various processes (NG process) such as transporting it to a predetermined place as a defective product, the test of the proportional electromagnetic control valve 10 is finished. Then, the adjusting device prepares for the next test of the new proportional electromagnetic control valve 10.

As described above in detail, according to this embodiment, the following effects can be obtained. (1) According to the present embodiment, the test current I having a predetermined value
When the actual pressure 1 of the discharge fluid does not reach the target pressure Pop with respect to s and the supply oil pressure Pa of the supply fluid, first, the differential pressure Δ between the actual pressure Pn1 before adjustment and the actual pressure Pn2 after adjustment.
Pd was determined. Then, from the differential pressure ΔPd and the adjustment amount θ1 of the adjusting screw 14, a change amount W of the actual pressure Pn with respect to a unit adjustment amount obtained by dividing the differential pressure ΔPd by the adjustment amount θ1 is obtained, and a deviation ΔP2 after adjustment is calculated as the change amount W1. A new adjustment amount θ2 was obtained from the value divided by. The elastic force of the elastic member is adjusted by rotating the adjusting screw based on the adjustment amount θ2. As a result, the actual pressure Pn to be discharged can be adjusted based on the individual difference of the proportional electromagnetic control valve 10, so that the proportional electromagnetic control valve 10 can be adjusted with a small number of turning operations of the adjusting screw 14. The pressure adjustment time can be shortened.

(2) Since the adjusting device can adjust the actual pressure Pn discharged based on the individual difference of the proportional electromagnetic control valve 10, the actual pressure Pn discharged is adjusted within the specified number of rotations of the adjusting screw 14. It is possible to adjust the pressure Pn to the target pressure Pop. Therefore, with the conventional adjustment method, the proportional electromagnetic control valve 10 that could not be made into a product due to the number of times of the specified rotation being exceeded can be adjusted within the specified number of rotations, and the yield can be improved.

The embodiment of the present invention is not limited to the above embodiment, but may be modified as follows. In the above embodiment, the adjusting screw 14 is used to change the elastic force of the adjusting spring 13, but the adjusting spring 13
Anything that can change the elastic force of
It is not limited to this.

In the above-mentioned embodiment, the adjusting spring 13 is used as the elastic member, but it is not limited to this as long as the urging force toward the spool 12 can be adjusted by changing the elastic force.

[0054]

As described in detail above, according to the inventions described in claims 1 to 5, in the pressure adjustment test of the proportional solenoid control valve, it is possible to perform the test in a short time regardless of the individual difference of the proportional solenoid control valve. Further, it is possible to provide a method and a device for adjusting the pressure of a proportional electromagnetic control valve with high accuracy.

[Brief description of drawings]

FIG. 1 is a block diagram of control of a proportional control solenoid valve.

FIG. 2 is an explanatory view of a method for adjusting a proportional electromagnetic control valve of the present invention.

FIG. 3 is an explanatory diagram of a method for adjusting a proportional electromagnetic control valve of the present invention.

FIG. 4 is an explanatory view of a conventional adjustment method of a proportional solenoid control valve.

[Explanation of symbols]

10 ... Proportional electromagnetic control valve, 10a ... Valve body part, 10b ... Solenoid part, 12 ... Spool, 13 ... Adjusting spring as elastic member, 14 ... Adjusting screw, 16 ... Supply port, 17 ... Discharge port, 31 ... Screw drive apparatus.

Claims (5)

[Claims] 1. An elastic force of an elastic member for achieving the target pressure based on the deviation between the discharge pressure of the discharge fluid and the target pressure with respect to the predetermined supply pressure of the supply fluid when energized with a predetermined test current. The amount of adjustment is calculated, and the elastic force of the elastic member is adjusted by the obtained amount of adjustment so that the test current is passed so that the discharge pressure of the discharge fluid with respect to the supply pressure of the supply fluid determined in advance becomes the target pressure. In the pressure adjusting method of the proportional solenoid control valve to be adjusted, while obtaining the adjusted deviation between the discharge pressure of the discharge fluid and the target pressure with respect to the supply pressure of the supply fluid when the test current is applied, the discharge pressure before adjustment Then, the differential pressure between the adjusted delivery pressure and the adjusted delivery pressure is determined, and the change in the delivery pressure with respect to the unit adjustment amount based on the individual difference is obtained from the differential pressure and the adjustment amount
The pressure of the proportional solenoid control valve is characterized in that a new adjustment amount is obtained based on the change amount and the adjusted deviation, and the elastic force of the elastic member is adjusted by the obtained new adjustment amount. Adjustment method. 2. The pressure adjusting method for a proportional electromagnetic control valve according to claim 1, wherein the change amount of the discharge pressure with respect to the unit adjustment amount based on the individual difference is a value obtained by dividing the differential pressure by the adjustment amount, The pressure adjustment method for a proportional solenoid control valve, wherein the new adjustment amount is a value obtained by dividing the adjusted deviation by the change amount. 3. The pressure adjusting method for a proportional electromagnetic control valve according to claim 1, wherein the elastic member is provided between a spool provided on the valve body portion and an adjusting screw screwed to the valve body portion. A pressure adjusting method for a proportional electromagnetic control valve, wherein the adjusting spring is provided for elastically pressing the spool toward the solenoid, and the adjustment amount and the new adjustment amount are rotation amounts of the adjustment screw. . 4. A discharge when a test current is applied to move a spool provided on a valve body section by a solenoid section to a position where it balances with an elastic force of an elastic member, and a supply fluid having a predetermined pressure is supplied to a supply port. Based on the deviation between the discharge pressure of the discharge fluid discharged from the port and a predetermined target pressure, an adjustment amount of the elastic force of the elastic member for obtaining the target pressure is obtained, and the elastic member of the elastic member is adjusted based on the adjustment amount. The adjusting screw for adjusting the elastic force is rotated by a screw driving device to adjust the elastic force, and the test current is applied to supply the discharge pressure of the discharge fluid with respect to the predetermined supply pressure of the supply fluid. In the pressure adjusting device for the proportional solenoid control valve, the deviation calculating means for obtaining the adjusted deviation between the adjusted discharge pressure of the discharge fluid and the target pressure, and the discharge pressure before the adjustment are adjusted. A change amount calculating means for obtaining a differential pressure between the discharge pressure after the adjustment and a change amount of the discharge pressure with respect to the unit adjustment amount based on the individual difference from the differential pressure and the adjustment amount, and the change amount and the deviation after the adjustment. A pressure adjusting device for a proportional electromagnetic control valve, comprising: an adjusting amount calculating means for obtaining a new adjusting amount based on the adjusting amount calculating means. 5. The pressure adjusting device for a proportional electromagnetic control valve according to claim 4, wherein the change amount calculating unit divides the differential pressure by the adjustment amount to obtain a discharge pressure with respect to a unit adjustment amount based on the individual difference. A proportional electromagnetic control, wherein the adjustment amount calculating means is for obtaining a new adjustment amount by dividing the adjusted deviation obtained by the deviation calculating means by the variation amount. Valve pressure regulator.