CN115476182A - Self-adaptive clamping device and method for thin-wall part - Google Patents

Abstract

The invention relates to the field of material reduction machining of large thin-wall parts, and discloses a self-adaptive clamping device and method for thin-wall parts. Different large thin-walled parts can be self-adapted according to the profile shapes of the large thin-walled parts, and the clamping position is adjusted according to the change of the cutting force; the change caused by the machining of the thin-wall part is detected in real time through the detection feedback system, the detection feedback system sends information detected by the self-adaptive clamping flexible unit bodies on the surface, to be clamped, of the thin-wall part to the control system, the control system judges the received information, and the judgment result drives the power system to drive the self-adaptive clamping flexible unit bodies to clamp, support or adsorb the surface, to be clamped, of the thin-wall part, so that the position deviation of the thin-wall part in the machining process is effectively reduced.

Description

A self-adaptive clamping device and method for thin-walled parts

technical field

The invention relates to the field of subtractive processing of large thin-walled parts, in particular to an adaptive clamping device and method for thin-walled parts.

Background technique

Due to the advantages of light weight and high structural efficiency, thin-walled parts are widely used in various fields. However, most thin-walled parts have complex surface profiles, thin walls and low rigidity, and are prone to instability and vibration during processing. The above problems are often encountered during processing. When the existing clamping method is used to fix it, due to the large wall and thin wall of the piece, its own strength is low and variable, and the inner and outer walls are processed, the clamping force is difficult to control, so it is easy to generate vibration during the processing. In the process of processing, when the clamping force is constant, it is easy to occur that after the workpiece is processed, the clamping force is removed and the workpiece is deformed. Due to the overall deformation, its accuracy is difficult to guarantee, resulting in an increase in the manufacturing cost of thin-walled parts. At present, for the material reduction processing of large thin-walled parts, the usual clamping method is difficult to eliminate the above problems, and the fixtures are highly targeted, which makes the cost of fixtures account for a relatively high proportion in processing. Therefore, there is a need for a clamping device that can be used for large thin-walled parts to solve the above problems.

Contents of the invention

In order to overcome the above-mentioned defects in the prior art, the object of the present invention is to provide an adaptive clamping device and method for thin-walled parts, so as to solve the problem caused by the vibration caused by the change of the cutting force of the tool during the processing of the prior art. The technical problem of position deviation of thin-walled parts during processing.

The present invention is achieved through the following technical solutions:

An adaptive clamping device for thin-walled parts, including a profiling clamp body, a detection feedback system, a control system, a power system, and several adaptive clamping flexible units; several adaptive clamping flexible units are sequentially assembled on the profiling On the clamp body, one end of several self-adaptive clamping flexible unit bodies is equipped with a multifunctional contact; the multifunctional contact is pressed against the surface to be clamped of the thin-walled part; They are all connected to the detection feedback system circuit; the signal transmission end of the detection feedback system is connected to the signal input end of the control system, the signal output end of the control system is connected to the signal receiving end of the power system, and the driving end of the power system is respectively connected to several automatic Adapt to clamping flexible unit body.

Preferably, the outline of the profiling clamp body is set corresponding to the outline of the thin-walled part.

Preferably, several self-adaptive clamping flexible unit bodies are dispersedly arranged on the to-be-clamped surface of the thin-walled part on the profiling clamp body, wherein the axis of each self-adaptive clamping flexible unit body is perpendicular to the to-be-clamped surface of the thin-walled part surface.

Preferably, the self-adaptive clamping flexible unit body includes an self-adaptive movement rod and a cylinder body; the self-adaptive movement rod is disposed through the cylinder body, and the multi-functional contact is assembled on the end of the self-adaptive movement rod close to the thin-walled part The other end of the self-adaptive moving rod is connected to the vacuum suction pipe, and the self-adaptive moving rod is provided with a vacuum pipeline, and the vacuum pipeline communicates with the multifunctional contact; Linear motion driving force port and locking driving force port; the first linear motion driving force port and the second linear motion driving force port are arranged on the cylinder body along a straight line, the first linear motion driving force port and the second linear motion driving force port The linear motion driving force ports are all connected to low air pressure or oil pressure devices, and the locking driving force ports are used for locking the movement of the self-adaptive moving rod.

Further, a pressure sensor is provided in the cylinder, and the pressure sensor is connected to a detection and feedback system.

Preferably, the multifunctional contact includes an outer ring structure and an inner ring structure, the inner ring structure is sleeved in the outer ring structure, and the side material of the outer ring structure is a rigid material for supporting thin-walled parts against processing pressure; The material of the inner ring mentioned above is a flexible material, which is used to absorb thin-walled parts.

Preferably, the detection feedback system includes several detection units, the several detection units are respectively connected to the signal ends of the several adaptive clamping flexible unit bodies, and the signal sending ends of the several detection units are all connected to the control system.

Preferably, the control system is provided with a controller, the input of the controller is connected to the signal input module, the output of the controller is connected to the signal processing module and the signal driving module, and the signal input module is connected to the detection feedback system; the signal driving module Connect the powertrain.

An adaptive clamping method for thin-walled parts, based on the aforementioned adaptive clamping device for thin-walled parts, comprising the following steps:

When thin-walled parts are processed by cutting tools, the profiling clamp body is placed close to the surface to be clamped of the thin-walled part, and several multi-functional contacts of adaptive clamping flexible units are pushed against the surface to be clamped of the thin-walled part Firstly, the surface to be clamped of the thin-walled parts is grouped and clamped, and the detection feedback system performs pressure detection on the circuit of each adaptive clamping flexible unit body, and feeds back the detected information to the control system. After receiving the information, the control system Carry out data judgment, when the pressure is detected to be less than the set threshold, the control system will drive the power system, and the power system will drive the adaptive clamping flexible unit body to move forward, so that the multi-functional contact is clamped and supported on the thin-walled part On the surface to be clamped; when the pressure is detected to be greater than the set threshold, the control system will drive the power system, and the power system will drive the adaptive clamping flexible unit to displace and retreat, so that the multi-functional contact is adsorbed on the thin-walled part. on the surface to be clamped.

Preferably, the power system uses air or oil as a driving medium to drive the self-adaptive clamping flexible unit body to perform reciprocating motion.

Compared with the prior art, the present invention has the following beneficial technical effects:

The invention provides an adaptive clamping device for thin-walled parts, which can adapt to different large thin-walled parts according to their contour shapes, and adjust the clamping position according to the change of cutting force; The change of the system is detected in real time through the detection feedback system. The detection feedback system sends the information detected by the self-adaptive clamping flexible unit body on the surface of the thin-walled part to be clamped to the control system, and the control system judges the received information, and The power system is driven by the judgment result to drive the self-adaptive clamping flexible unit body to clamp, support or absorb the surface of the thin-walled part to be clamped, effectively reducing the positional deviation of the thin-walled part during processing.

Further, the contour line of the profiling clamp body is set corresponding to the contour line of the thin-walled part, which effectively reduces the movement stroke of the adaptive clamping flexible unit body installed on the profiling clamp body, and facilitates the self-adaptive clamping of the flexible unit The body clamps and supports or absorbs the surface to be clamped of the thin-walled part.

Further, several self-adaptive clamping flexible unit bodies are dispersedly arranged on the surface of the thin-walled part to be clamped on the profiling clamp body, wherein the axis of each self-adaptive clamping flexible unit body is perpendicular to the to-be-clamped surface of the thin-walled part surface, so that the surface to be clamped of the thin-walled part is clamped and supported or adsorbed by each self-adaptive clamping flexible unit body.

Further, the cylinder body in the self-adaptive clamping flexible unit body is respectively provided with a first linear motion driving force port and a second linear motion driving force port, wherein the first linear motion driving force port is powered, and the second linear motion driving force port is provided with power. If the driving force port for linear motion does not provide power, the adaptive moving rod moves forward; if the driving force port for the first linear motion does not provide power, and the driving force port for the second linear motion provides power, the adaptive moving rod moves backward; forward When moving, the multifunctional contact is clamped and supported on the surface to be clamped of the thin-walled part; when moving backward, the multifunctional contact is adsorbed on the surface to be clamped of the thin-walled part.

Furthermore, a pressure sensor is installed in the cylinder to effectively detect the pressure in the cylinder and send the pressure data to the detection feedback system, which improves the pressure detection efficiency in the adaptive clamping flexible unit.

Further, the multifunctional contact includes an outer ring structure and an inner ring structure. The side material of the outer ring structure is a rigid material, which is used to support the thin-walled parts against processing pressure, and realizes the clamping and supporting effect on the thin-walled parts. The inner ring The material is a flexible material, which is used to absorb thin-walled parts and avoid positional deviation of thin-walled parts.

Further, the control system is equipped with a controller to analyze the information of the detection feedback system, and control the power output source to output energy through the connector to perform adaptive control on the self-adaptive clamping flexible unit body.

The invention provides an adaptive clamping method for thin-walled parts. The clamping position is adjusted according to the change of the cutting force, and the thin-walled parts are clamped, supported or adsorbed by the adaptive clamping flexible unit body, so as to avoid the thin-walled parts from The position offset is sent under the action of the cutting force, and then the pressure value of the adaptive clamping flexible unit body on the thin-walled part is detected through the detection feedback system, and the detection is sent to the control system, and the power output source is controlled to output through the connector Energy adaptively controls the adaptive clamping flexible unit body, effectively reducing the positional deviation of thin-walled parts during processing;

Description of drawings

Fig. 1 is the structural representation of the self-adaptive clamping device of the thin-walled part provided by the present invention;

Fig. 2 is a structural schematic diagram of the self-adaptive clamping flexible unit body of the present invention;

Fig. 3 is a schematic structure diagram of the controller in the present invention.

In the figure: 1-profiling clamp body; 2-adaptive clamping flexible unit body; 3-multifunctional contact; 4-detection feedback system; 5-control system; 6-power system; 7-adaptive moving rod; 8-first linear motion driving force port; 9-second linear motion driving force port; 10-locking driving force port; 11-cylinder body.

detailed description

In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

The present invention is described in further detail below in conjunction with accompanying drawing:

The object of the present invention is to provide an adaptive clamping device and method for thin-walled parts, so as to solve the problem of the vibration caused by the change of the cutting force of the cutting tool in the prior art, which causes the thin-walled parts to be out of position during the processing process. Moving technical issues.

Specifically, as shown in Figure 1, the adaptive clamping device for thin-walled parts includes a profiling clamp body 1, a detection feedback system 4, a control system 5, a power system 6, and several adaptive clamping flexible unit bodies 2; Several self-adaptive clamping flexible unit bodies 2 are sequentially assembled on the profiling clamp body 1, and one end of several self-adaptive clamping flexible unit bodies 2 is equipped with a multifunctional contact 3; The surface to be clamped of the part; the other ends of several self-adaptive clamping flexible unit bodies 2 are all connected to the detection feedback system 4 circuit; the signal transmission end of the detection feedback system 4 is connected to the signal input end of the control system 5, and the control The signal output end of the system 5 is connected to the signal receiving end of the power system 6 , and the driving end of the power system 6 is respectively connected to several adaptive clamping flexible unit bodies 2 .

Specifically, the outline of the profiling clamp body 1 is set corresponding to the outline of the thin-walled part.

Specifically, several self-adaptive clamping flexible unit bodies 2 are dispersedly arranged on the surface of the thin-walled part to be clamped on the profiling clamp body 1, wherein the axis of each self-adaptive clamping flexible unit body 2 is perpendicular to the thin-walled part. surface to be clamped.

Specifically, as shown in FIG. 2 , the adaptive clamping flexible unit body 2 includes an adaptive moving rod 7 and a cylinder body 11; Assembled on one end of the adaptive moving rod 7 close to the thin-walled part; the other end of the adaptive moving rod 7 is connected with a vacuum suction pipe, and a vacuum pipeline is arranged in the self-adaptive moving rod 7, and the vacuum pipeline communicates with the multifunctional contact 3; the cylinder The body 11 is respectively provided with a first linear motion driving force port 8, a second linear motion driving force port 9 and a locking driving force port 10; the first linear motion driving force port 8 and the second linear motion driving force port The port 9 is arranged on the cylinder body 11 along a straight line, the first linear motion driving force port 8 and the second linear motion driving force port 9 are connected to low air pressure or oil pressure device, and the locking driving force port 10 is used for locking Tightly adapt to the movement of the mobile bar 7.

Wherein, a pressure sensor is arranged inside the cylinder body 11 , and the pressure sensor is connected to the detection and feedback system 4 .

Specifically, the multifunctional contact 3 includes an outer ring structure and an inner ring structure, the inner ring structure is sleeved in the outer ring structure, and the side material of the outer ring structure is a rigid material, which is used to support thin-walled parts against processing pressure; The material of the inner ring is a flexible material, and the negative pressure is generated by the vacuum unit in the power system 6, and the workpiece to be processed is adsorbed by the vacuum suction tube, which is used to adsorb the thin-walled parts.

Specifically, the detection feedback system 4 includes several detection units, which are respectively connected to the signal ends of several adaptive clamping flexible unit bodies 2 , and the signal sending ends of the several detection units are all connected to the control system 5 . A detection unit is installed on the control loop of each adaptive clamping flexible unit body 2, and the detection unit detects the information of each loop during the processing and feeds the information back to the control system 5, forming a closed loop with the control system 5 The system enables the adaptive clamping flexible unit body 2 to realize the adaptive control function.

Specifically, a controller is provided in the control system 5, as shown in Figure 3, the input end of the controller is connected to the signal input module, the output end of the controller is connected to the signal processing module and the signal driving module, and the signal input module is connected to The detection feedback system 4; the signal driving module is connected to the power system 6.

In the present invention, the control system 5 is composed of a calculation controller, a signal receiver and sender, a control actuator, a connector, etc.; through the information analysis of the detection feedback system 4, the power output source is controlled to output energy through the connector to the self-adaptive clamping The flexible unit body 2 performs adaptive control.

In the present invention, the power system 6 is used as the power source of the whole device to provide the force required for movement and clamping to the self-adaptive clamping flexible unit body 2, and to provide negative pressure for the adsorption of the multifunctional contact 3 . The size of the output force is controlled by the control actuator of the control system 5 .

The present invention also provides an adaptive clamping method for thin-walled parts, based on the above-mentioned self-adaptive clamping device for thin-walled parts, including the following steps:

When thin-walled parts are processed by cutting tools, the profiling clamp body 1 is placed close to the surface to be clamped of the thin-walled part, and several multifunctional contacts 3 of adaptive clamping flexible unit bodies 2 are pushed against the to-be-clamped surface of the thin-walled part. On the clamping surface, the surface to be clamped of the thin-walled parts is clamped in groups, and the detection feedback system 4 performs pressure detection on the circuit of each adaptive clamping flexible unit body 2, and feeds back the detected information to the control system 5 , the control system 5 performs data judgment after receiving the information, and when the pressure is detected to be less than the set threshold, the control system 5 drives the power system 6, and the power system 6 drives the adaptive clamping flexible unit body 2 to move forward, so that more The functional contact 3 is clamped and supported on the surface of the thin-walled part to be clamped; when the pressure is detected to be greater than the set threshold, the control system 5 drives the power system 6, and the power system 6 drives the adaptive clamping flexible unit body 2 to move back, so that the multifunctional contact 3 is adsorbed on the surface of the thin-walled part to be clamped.

Wherein, the power system 6 uses gas or oil as a driving medium to drive the self-adaptive clamping flexible unit body 2 to perform reciprocating motion.

In the present invention, the self-adaptive moving part can be hollow or non-hollow self-adaptive moving part according to the material of the large thin-walled part. Under the push of low air pressure or oil pressure, it is close to the surface of the thin-walled part to be clamped, and the detection feedback system 4 detects Stop moving after the air pressure or oil pressure reaches the set value, and now the locking driving force port 10 clamps the self-adaptive moving parts.

Example

For the clamping work of a large thin-walled part, an adaptive clamping device and method for thin-walled parts are adopted. When in use, the self-adaptive clamping flexible unit body 2 is placed on the profiling clamp body 1 according to the characteristics of the thin-walled part Group layout, each group of several self-adaptive clamping flexible unit bodies 2 are distributed on the surface of the parts to be clamped, and clamped in groups and timed when clamping, so as to further reduce the clamping deformation of the parts; at the same time, each self-adaptive clamping The axis of the self-adaptive moving part adapted to clamp the flexible unit body 2 is perpendicular to the surface to be clamped of the part. The detection feedback system 4 detects the loops of each adaptive clamping flexible unit body 2, and feeds back the detected changes to the control system 5, and the control system then controls the power system 6 to drive the self-adaptive clamping flexible unit body 2. The adaptive moving part is connected with the thin-walled part with the multifunctional contact 3, and the adaptive moving part is locked.

In summary, the present invention provides an adaptive clamping device and method for thin-walled parts, which can adapt to different large thin-walled parts according to their contour shapes, and adjust the clamping position according to the change of cutting force; The changes caused by the processing of thin-walled parts are detected in real time through the detection and feedback system. The detection and feedback system sends the information detected by the adaptive clamping flexible unit body on the surface of the thin-walled part to be clamped to the control system. The received information is judged, and the judgment result is used to drive the power system to drive the adaptive clamping flexible unit body to clamp, support or absorb the surface of the thin-walled part to be clamped, effectively reducing the stress of the thin-walled part during processing. position offset.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention can still be Any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention shall fall within the protection scope of the claims of the present invention.

Claims (10)

1. An adaptive clamping device for thin-walled parts, characterized in that it comprises a profiling clamp body (1), a detection feedback system (4), a control system (5), a power system (6) and several adaptive clamps Tight flexible unit body (2); several self-adaptive clamping flexible unit bodies (2) are sequentially assembled on the profiling clamp body (1), and one end of several self-adaptive clamping flexible unit bodies (2) is equipped with a multifunctional contact (3); the multi-functional contact (3) is pressed against the surface to be clamped of the thin-walled part; the other ends of several self-adaptive clamping flexible unit bodies (2) are connected to the circuit of the detection feedback system (4); The signal transmission end of the detection feedback system (4) is connected to the signal input end of the control system (5), the signal output end of the control system (5) is connected to the signal receiving end of the power system (6), and the power system (6) The driving ends of the drive end are respectively connected with several self-adaptive clamping flexible unit bodies (2). 2. The self-adaptive clamping device for thin-walled parts according to claim 1, characterized in that, the profile line of the profiling clamp body (1) is set corresponding to the contour line of the thin-walled part. 3. An adaptive clamping device for thin-walled parts according to claim 1, characterized in that, several adaptive clamping flexible unit bodies (2) are dispersedly arranged on the thin-walled clamping body (1) The surface to be clamped of the thin-walled part, wherein the axis of each self-adaptive clamping flexible unit body (2) is perpendicular to the surface to be clamped of the thin-walled part. 4. An adaptive clamping device for thin-walled parts according to claim 1, characterized in that, the adaptive clamping flexible unit body (2) includes an adaptive moving rod (7) and a cylinder body (11 ); the self-adaptive moving rod (7) is arranged through the cylinder body (11), and the multifunctional contact (3) is assembled on an end of the self-adaptive moving rod (7) close to the thin-walled part; the self-adaptive moving rod The other end of (7) is connected with a vacuum suction pipe, and a vacuum pipeline is arranged in the self-adaptive moving rod (7), and the vacuum pipeline communicates with the multifunctional contact (3); Motion driving force port (8), second linear motion driving force port (9) and locking driving force port (10); said first linear motion driving force port (8) and second linear motion driving force port ( 9) Set on the cylinder body (11) along a straight line, the first linear motion driving force port (8) and the second linear motion driving force port (9) are both connected to low air pressure or oil pressure device, the locking drive The force port (10) is used for locking the movement of the self-adaptive moving rod (7). 5. An adaptive clamping device for thin-walled parts according to claim 4, characterized in that a pressure sensor is provided inside the cylinder (11), and the pressure sensor is connected to the detection and feedback system (4) . 6. An adaptive clamping device for thin-walled parts according to claim 1, characterized in that, the multifunctional contact (3) includes an outer ring structure and an inner ring structure, and the inner ring structure is sleeved In the outer ring structure, the side material of the outer ring structure is a rigid material, which is used to support the thin-walled parts against processing pressure; the material of the inner ring is a flexible material, which is used to absorb the thin-walled parts. 7. The adaptive clamping device for thin-walled parts according to claim 1, characterized in that, the detection feedback system (4) includes several detection units, and several detection units are connected with several adaptive clamping flexible units respectively. The signal terminals of the body (2) are connected, and the signal sending terminals of several detection units are all connected to the control system (5). 8. The self-adaptive clamping device for thin-walled parts according to claim 1, characterized in that, the control system (5) is provided with a controller, and the input end of the controller is connected to a signal input module, The output end of the controller is connected to a signal processing module and a signal driving module, and the signal input module is connected to a detection feedback system (4); the signal driving module is connected to a power system (6). 9. An adaptive clamping method for thin-walled parts, based on the adaptive clamping device for thin-walled parts according to any one of claims 1-8, characterized in that it comprises the following steps: When thin-walled parts are processed by cutting tools, the profiling clamp body (1) is placed close to the surface to be clamped of the thin-walled parts, and several multi-functional contacts (3) of the self-adaptive clamping flexible unit body (2) are pushed On the surface to be clamped of the thin-walled part, the surface to be clamped of the thin-walled part is clamped in groups, and the detection feedback system (4) performs pressure detection on the circuit of each self-adaptive clamping flexible unit body (2), And the detected information is fed back to the control system (5), and the control system (5) performs data judgment after receiving the information. When the pressure is detected to be less than the set threshold, the control system (5) drives the power system (6), and the power The system (6) displaces and advances the driving adaptive clamping flexible unit body (2), so that the multi-functional contact (3) is clamped and supported on the surface to be clamped of the thin-walled part; when the pressure is detected to be greater than the set threshold, the control system (5) drives the power system (6), and the power system (6) drives the adaptive clamping flexible unit body (2) to move back, so that the multifunctional contact (3) is adsorbed on the thin-walled part on the surface to be clamped. 10. An adaptive clamping method for thin-walled parts according to claim 9, characterized in that the power system (6) uses air or oil as a driving medium to drive the adaptive clamping flexible unit body (2) Perform a back and forth motion.

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