KR102827249B1 - Compatible Fixture - Google Patents

Abstract

The present invention provides an interchangeable fixing fixture comprising: a pin section including a fixed pin positioned on one side of each of a plurality of workpieces to be processed, and a variable pin positioned on the other side and fixed so that the position thereof is variably changed according to the size and shape of the workpieces to be processed; a pallet section supporting the pin section; and a pallet fixing section automatically locking the pallet section when the pallet section is settled on a table of a processing device; and characterized in that the natural frequency of the pallet section is changed with respect to vibrations generated from the processing device to avoid resonance, thereby maintaining the processing precision of the workpieces to be processed.

Description

Compatible Fixture

The present invention relates to an interchangeable fixture, and more particularly, to an interchangeable fixture that provides a pallet-type fixture that is interchangeable for each part, thereby improving productivity and avoiding resonance due to vibration of processing equipment, thereby maintaining the precision of processed products.

Machining equipment, such as machine tools, includes equipment that processes metal or non-metal materials into required shapes and dimensions using appropriate tools, or for more detailed precision processing.

In modern industrial settings, it is necessary to produce a variety of parts in small quantities due to process segmentation and limited market conditions, but since production costs are limited, there may be cases where multiple parts must be processed within existing facilities.

When a product to be processed in a facility needs to be replaced in order to produce a variety of parts, the facility must first be stopped and manpower must be used to replace the fixture for the next product to be processed. However, since the processing equipment must be stopped and the fixture replaced, the equipment operating rate is reduced, which may result in a loss of production time and manpower. This may cause a decrease in productivity and an increase in the unit price of processed products.

To solve this problem, technology is being developed for the processing equipment table and fixtures that are compatible with each type of processed product.

Interchangeable fixtures may have a more complex structure than conventional fixtures, and the complex structure may cause the natural frequency range to expand, which may resonate with the frequency of the motor or spindle of the processing equipment, resulting in a decrease in precision during processing of the product.

In addition, due to resonance, the fastening force of each interchangeable fixture and the processing equipment table may be weakened, which may cause slight shaking and vibration, which may cause the precision tolerance of the part to be exceeded or cause problems with the surface roughness. This may be a bigger problem for products such as guided weapon parts that require precision processing to secure weight balance and assembly between parts, so it is necessary to develop technology for interchangeable fixtures to maintain the productivity of high-variety, small-quantity production and the precision of processed products.

Korean Patent No. 10-1594681 (Registration Date: February 5, 2016) Korean Patent Publication No. 10-2003-0083734 (Publication date: October 30, 2003)

The technical problem to be achieved by the present invention is to provide an interchangeable fixing fixture capable of producing a variety of parts with a single processing device.

In addition, another technical problem to be achieved by the present invention is to provide a compatible fixing fixture that can prevent resonance and fine shaking and vibration caused by vibration from processing equipment and improve the precision of processed products.

The purpose of the present invention is not limited to the purpose mentioned above, and other purposes not mentioned will be clearly understood by those skilled in the art to which the present invention belongs from the description below.

In order to solve the above problem, the present invention can provide an interchangeable fixing fixture including a pin section including a fixed pin positioned on one side of each of a plurality of workpieces to be processed, and a variable pin positioned on the other side and fixed so that the position thereof is variably changed according to the size and shape of the workpieces to be processed; a pallet section supporting the pin section; and a pallet fixing section automatically locking the pallet section when the pallet section is settled on a table of a processing device; and characterized in that the natural frequency of the pallet section is changed with respect to vibrations generated from the processing device to avoid resonance, thereby maintaining the processing precision of the workpiece.

The above-mentioned compatible fixture can avoid resonance by changing the natural frequency of the pallet portion by adjusting the number or position of the pallet fixing portions according to the vibration generated from the processing equipment and thereby controlling the rigidity of the pallet portion.

The above pallet fixing part may include a plurality of nipples that are coupled to the lower side of the pallet part and have a concave part formed on the outer surface, and a fixing point module that is coupled to the table of the processing equipment and to which the nipples are coupled and fixed.

The above fixed point module may include a cylindrical fixed body to which the outer surface of the nipple is coupled, and a fixed point to which the lower part of the nipple is fitted.

The above fixed body includes a joining member provided with one or more balls or rings protruding from its inner surface, and the joining member may be joined with a concave portion of the nipple.

The above fixed point module may be connected to a negative pressure forming unit that forms negative pressure inside the nipple or the above fixed point.

The above nipple may be moved in position according to the size or natural frequency of the pallet portion and may be combined with a fixed point module provided below the moved position.

The above fixed point module may have a variable position on the table top surface of the processing equipment.

An interchangeable fixture according to an embodiment of the present invention includes a pin portion whose position can be varied depending on the size and shape of a workpiece to be processed, thereby enabling the production of a variety of parts with a single piece of processing equipment. In addition, the combination of a nipple whose position can be moved depending on the size of a pallet and a fixed point module whose position can be varied on the upper surface of a table of the processing equipment has the effect of further expanding compatibility.

In addition, it has the advantage of preventing minute shaking and vibration by changing the natural frequency of the pallet section to avoid resonance caused by vibrations from processing equipment, and improving the precision of processed products.

Figure 1 is a cross-sectional view showing the state before combining a compatible fixture and a processing equipment table according to an embodiment of the present invention.
Figure 2 is a cross-sectional view showing the combination of a compatible fixture and a processing equipment table according to an embodiment of the present invention.
Figures 3a and 3b are cross-sectional views showing a pallet fixing part of a compatible fixing device according to an embodiment of the present invention.
Figure 4 is a cross-sectional view showing the pin portion of a compatible fixing device according to an embodiment of the present invention.
FIG. 5 is a cross-sectional view showing the movement of a nipple of a compatible fixture according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. The embodiments introduced below are provided as examples so that those skilled in the art can sufficiently convey the spirit of the present invention. Therefore, the present invention is not limited to the embodiments described below and may be embodied in other forms. In addition, in the drawings, the lengths and thicknesses of layers and regions may be exaggerated for convenience. Like reference numerals represent like elements throughout the specification.

FIG. 1 is a cross-sectional view showing a state before coupling a compatible fixing fixture and a processing equipment table according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing a state after coupling a compatible fixing fixture and a processing equipment table according to an embodiment of the present invention, FIGS. 3a and 3b are cross-sectional views showing a pallet fixing portion of a compatible fixing fixture according to an embodiment of the present invention, FIG. 4 is a cross-sectional view showing a pin portion of a compatible fixing fixture according to an embodiment of the present invention, and FIG. 5 is a cross-sectional view showing the movement of a nipple of a compatible fixing fixture according to an embodiment of the present invention.

Referring to FIGS. 1 to 5, an interchangeable fixing fixture according to an embodiment of the present invention can be coupled to a table (10) of a processing equipment including a pin portion (120), a pallet portion (130), and a pallet fixing portion (140).

To explain in detail, a plurality of processing objects (110) positioned between the fins (120) require processing of a required shape and size or precision processing. For example, the processing objects (110) may be precision processing parts applied to advanced guided weapon systems.

The above-described workpiece (110) is positioned and fixed between pins (120), and the pins (120) may include fixed pins (122) positioned on one side of each of the workpieces (110), and variable pins (124) positioned on the other side and fixed so that their positions are variable depending on the size and shape of the workpieces (110). The variable pins (124) are released according to the size and shape of the workpieces (110), and then moved (a), that is, their positions are variable depending on the size and shape of the workpieces (110), and are positioned on the other side of the workpieces (110), and after the workpieces (110) are fixed, the variable pins (124) may be fixed to the pallet (130).

That is, the pallet part (130) can support the pin part (120), and for example, the release and fixation of the variable pin (124) from the pallet part (130) can be performed using a screw connection.

Accordingly, since a compatible fixing fixture including a pin portion (120) whose position varies depending on the size and shape of the workpiece (110) is provided, there is an advantage in that a variety of parts can be produced from a single piece of processing equipment.

The pallet fixing member (140) can automatically lock the pallet member (130) when the pallet member (130) is placed on the table (10) of the processing equipment.

The above pallet fixing part (140) may include a plurality of nipples (142) that are coupled to the lower side of the pallet part (130) and have a concave part (142a) formed on the outer surface, and a fixed point module (144) that is coupled on the table (10) of the processing equipment and to which the nipples (142) are coupled and fixed. That is, when the pallet part (130) moves downward, each nipple (142) is inserted into the corresponding fixed point module (144) so that the nipples (142) and the fixed point module (144) are coupled, so that the pallet part (130) can be fixed on the table (10) of the processing equipment, and the workpiece (110) to be processed can be positioned on the table (10) of the processing equipment.

The above fixed point module (144) may include a cylindrical fixed body (144-1) to which the outer surface of the nipple (142) is coupled, and a fixed point (144-3) to which the lower end of the nipple (142) is fitted.

The fixed body (144-1) includes a coupling member (144-5) provided with one or more balls or rings protruding from its inner surface, and the coupling member (144-5) may be coupled with a concave portion (142a) of the nipple. When the nipple (142) is lowered, the coupling member (144-5) moves inwardly along the outer surface of the protruding lower portion of the nipple (142) toward the fixed body (144-1), and when it comes into contact with the concave portion (142a) of the nipple, the coupling member (144-5) protrudes outwardly and the coupling member (144-5) is fitted into the concave portion (142a), so that the nipple (142) can be coupled to the fixed point module (144). For example, the coupling member (144-5) may be made of an elastic material such as urethane.

The above fixed point module (144) may be connected to a negative pressure forming unit (not shown) that forms negative pressure inside the nipple (142) or the fixed point (144-3). Accordingly, the combined nipple (142) and fixed point module (144) can be further fixed by negative pressure, thereby further preventing minute shaking of the workpiece (110) during the processing.

The above nipple (142) may be moved (b) in position according to the size or natural frequency of the pallet portion (130) and may be combined with a fixed point module (144) provided below the moved position. That is, the fixed point modules (144) may be provided on the table (10) of the processing equipment in greater numbers than the number of nipples (142). Accordingly, the positional variability of the nipple (142) that fixes the pallet portion (130) according to the pin portion (120) whose size may be changed by the processing target product (110) is further expanded, thereby further improving the compatibility of the interchangeable fixing fixture, and there is also an effect of avoiding resonance due to vibration generated from the processing equipment by variously changing the coupling position between the pallet portion (130) and the processing equipment table (10).

That is, the above-mentioned compatible fixture adjusts the rigidity of the pallet portion (130) coupled with the table (10) of the processing equipment by adjusting the number or position of the pallet fixing portions (140) according to the vibration generated from the processing equipment, thereby changing the natural frequency of the pallet portion (130) and avoiding resonance. For example, by adjusting the number or position of the pallet fixing portions (140) according to the processing conditions such as the equipment spindle and motor operating speed of the processing equipment, the coupling strength between the table (10) and the pallet portion (130) can be adjusted, thereby changing the rigidity of the pallet portion (130), and vibration control becomes possible by avoiding resonance, so that precision can be improved.

In addition, the fixed point module (144) may have a variable position on the upper surface of the table (10) of the processing equipment. In addition, by varying the joining position of the pallet fixing part (140) when joining the pallet part (130) and the table (10) of the processing equipment, the compatibility can be further expanded, and by varying the joining position of the nipple (142) and the fixed point module (144) between the pallet part (130) and the processing equipment table (10), there is also an effect of avoiding resonance due to vibrations generated from the processing equipment.

In addition, the interchangeable fixture can change the natural frequency of the pallet part (130) to avoid resonance due to vibrations generated from the processing equipment, thereby maintaining the processing precision of the processing target product (110). For example, the natural frequency of the interchangeable fixture can be known through structural analysis of the interchangeable fixture. When the spindle of the processing equipment has a frequency of 15 Hz, the natural frequency of the pallet part (130) can be controlled to 20 Hz or higher to avoid resonance, thereby preventing minute shaking and vibration of the pallet part (130), thereby having the advantage of improving the precision of the fixed processing target product (110).

The interchangeable fixing fixture according to an embodiment of the present invention includes a pin portion (120) whose position can be varied depending on the size and shape of a workpiece (110), thereby enabling the production of a variety of parts with a single piece of processing equipment. In addition, the combination of a nipple (142) whose position can be moved depending on the size of a pallet and a fixed point module (144) whose position can be varied on the upper surface of a table (10) of the processing equipment has the effect of further expanding compatibility.

In addition, there is an advantage in that by changing the natural frequency of the pallet section (130) to avoid resonance due to vibrations generated from the processing equipment, fine shaking and vibration can be prevented, and the precision of the processed product can be improved.

Although the present invention has been described above with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various modifications and changes may be made to the present invention without departing from the spirit and scope of the present invention as set forth in the claims below.

10; Processing equipment table
110; Product to be processed
120; pin
122; Fixed pin
124; variable pin
130; Pallet section
140; Pallet Fixture
142; Nipple
144; Fixed point module

Claims (8)

A pin section including a fixed pin positioned on one side of each of a plurality of processing objects and a variable pin positioned on the other side and fixed so that the position thereof varies depending on the size and shape of the processing objects;
A pallet portion supporting the above pin portion; and
A pallet fixing part that automatically locks the pallet part when the pallet part is placed on the table of the processing equipment;
By changing the natural frequency of the pallet section to avoid resonance due to vibrations generated from the processing equipment, the processing precision of the processing target is maintained.
The above pallet fixing part includes a plurality of nipples that are coupled to the lower side of the pallet part and have a concave part formed on the outer surface, and a fixing point module that is coupled to the table of the processing equipment and to which the nipples are coupled and fixed.
The above fixed point module includes a cylindrical fixed body to which the outer surface of the above nipple is joined, and a fixed point to which the lower part of the above nipple is fitted.
The above fixed point module is connected to a negative pressure forming unit that forms negative pressure inside the nipple or the above fixed point.
Compatible fixture.
In paragraph 1,
The above-mentioned compatible fixing fixture is characterized in that it avoids resonance by changing the natural frequency of the pallet portion by adjusting the number or position of the pallet fixing portions according to the vibration generated from the processing equipment and thereby controlling the rigidity of the pallet portion.
delete delete In paragraph 1,
An interchangeable fixing fixture, characterized in that the fixed body includes a connecting member provided with one or more balls or rings protruding from its inner surface, and the connecting member is connected to a concave portion of the nipple.
delete In paragraph 1,
The above nipple is a compatible fixing fixture characterized in that its position is moved according to the size or natural frequency of the pallet portion and is combined with a fixed point module provided below the moved position.
In paragraph 1,
The above fixed point module is a compatible fixed fixture characterized in that its position on the upper surface of the table of the processing equipment is variable.