Aluminum alloy automobile control arm machining fixture

Abstract

The aluminum alloy automobile control arm machining clamp relates to the technical field of automobile part machining clamps, and comprises a square clamp main plate, an assembly pressure reducing valve is arranged on the square clamp main plate, the pressure reducing valve is communicated with the internal pneumatic drive pipeline of the main plate, a lifting assembly is arranged at the center of the upper surface of the main plate, a set of clamping assemblies is arranged on each side of the lifting assembly, each set of clamping assemblies can clamp the automobile control arm body, each set of clamping assemblies realizes multidirectional positioning and pressing, an electromagnetic side positioner adopts an electromagnetic magnetism suction locking structure, a gas detection presser is integrated with a rotary clamping cylinder and a gas detection pressing plate, each pneumatic component is independently supplied with gas, a fixed plate is arranged on the outside of the main plate and used for machine tool installation, the lifting assembly with a lifting ring at the center of the main plate is convenient for overall transfer, the aluminum alloy workpiece clamping deformation can be avoided by multi-point support positioning, the integrated gas detection detection improves the clamping reliability, double-station synchronous machining is realized, and the clamp is suitable for automatic batch production.

Description

Technical Field

[0001] This utility model relates to the field of machining fixtures for automotive parts, and in particular to a machining fixture for an aluminum alloy automotive control arm. Background Technology

[0002] In automated production of mechanical processing, machining fixtures are the core components that ensure the positioning accuracy, clamping reliability and processing consistency of workpieces, directly affecting the processing quality and production efficiency of products. With the continuous development of automotive lightweight technology, automotive control arm bodies, due to their advantages of light weight and high specific strength, are gradually replacing traditional steel control arms and becoming the mainstream component of passenger car suspension systems.

[0003] However, aluminum alloys have low elastic modulus and poor rigidity. Conventional fixtures have only one support point, and clamping force can easily cause workpiece deformation, resulting in non-compliance with dimensional and positional tolerances. At the same time, the production of automotive parts is trending towards multi-specification and quick changeover modes. Traditional fixtures are only suitable for a single type of workpiece, have poor versatility, and manual positioning and clamping are time-consuming and have large fluctuations in positioning accuracy, making it difficult to meet the requirements of automated mass production. Existing fixtures have obvious defects and urgently need to be optimized and improved.

[0004] Therefore, it is essential to provide an aluminum alloy automotive control arm machining fixture to address the shortcomings of existing technologies. Utility Model Content

[0005] The purpose of this utility model is to provide a machining fixture for aluminum alloy automotive control arms by overcoming the shortcomings of the prior art. This utility model solves the problem of deformation during clamping of aluminum alloy control arms by using a multi-point composite support and positioning structure in conjunction with a pneumatic and air-inspection integrated clamping mechanism. The dual-station synchronous clamping improves processing efficiency, and the magnetic adjustment side positioner balances positioning accuracy and workpiece loading and unloading convenience. The fully pneumatic independent branch control is adapted to automated production line transfer and processing.

[0006] A machining fixture for an aluminum alloy automotive control arm is provided, comprising a square fixture main board, a pressure reducing valve installed on the square fixture main board, the pressure reducing valve being connected to a pneumatic drive pipeline disposed inside the square fixture main board, a set of lifting assemblies and two sets of clamping assemblies being mounted on the upper surface of the square fixture main board, the lifting assemblies being mounted at the center of the square fixture main board, and the two sets of clamping assemblies being disposed on both sides of the lifting assemblies, each set of clamping assemblies clamping the automotive control arm body.

[0007] Each clamping assembly includes four air detector clamps and two air detector support seats mounted on the square clamp main board. The four air detector clamps are arranged in a matrix and move against the outside of the vehicle control arm body. Every two air detector clamps are matched with one air detector support seat and clamp the vehicle control arm body from top to bottom. The square clamp main board has a beveled guide hole vertically opened near each air detector support seat.

[0008] Three bottom support telescopic blocks are installed on the outer ring of each bevel guide hole on the main board of the square clamp. A side positioning seat is installed next to each bevel guide hole. A clamping telescopic block is installed on the opposite side of the side positioning seat on the main board of the square clamp. The side positioning seat and the clamping telescopic block clamp the two sides of the car control arm body. An end positioning support seat is installed on the main board of the square clamp.

[0009] An end positioning support abuts against one end of the vehicle control arm body, and an electromagnetic side positioner is movably abutted against the other end of the vehicle control arm body. A center support is installed in the middle of the square clamp main board, and the center support abuts against the middle of the bottom surface of the vehicle control arm body.

[0010] The electromagnetic side positioner includes an electromagnetic positioning base, which is mounted on a side positioning seat. An end face abutment arm is hinged to the electromagnetic positioning base. An abutment block is installed at the end of the end face abutment arm. The abutment block movably abuts against one end of the vehicle control arm body. A cylindrical iron is installed in the middle of the end face abutment arm. A rubber pad is installed on the end face abutment arm near the cylindrical iron. A cylindrical groove is opened on the side of the electromagnetic positioning base near the end face abutment arm. An annular electromagnet is installed inside the cylindrical groove. The annular electromagnet and the cylindrical iron are magnetically matched. The rubber pad movably abuts against the outside of the annular electromagnet.

[0011] The air detection clamping device includes a rotary clamping cylinder, which is mounted on the main board of the square clamp and connected to the corresponding pneumatic drive branch. The working end of the rotary clamping cylinder is fitted with an air detection clamping plate, which is connected to the air detection pipeline inside the rotary clamping cylinder and connected to the air detection control system.

[0012] The lifting device assembly includes several support columns, which are vertically installed at the center of the square clamp main board. A square support plate is installed above the support columns, and lifting rings are installed at the four corners of the square support plate.

[0013] Both the bottom support telescopic block and the clamping telescopic block are pneumatic telescopic blocks driven by cylinders and are independently connected to their respective pneumatic drive branches.

[0014] A fixing plate is installed on the outside of the square fixture main board, and the square fixture main board is installed on the machine tool worktable through the fixing plate.

[0015] This utility model is equipped with two sets of clamping components to achieve simultaneous processing at two workstations, thereby increasing the processing capacity of a single batch. The main board of the square clamp integrates a lifting component at its center, and the lifting ring can be used with lifting equipment to complete the overall transfer of the entire clamp, which is suitable for the quick change requirements of automated machine tools.

[0016] This utility model uses a matrix-type four-group air pressure clamping device with an air pressure support seat to achieve upper and lower clamping of the workpiece. The bottom surface is equipped with a bottom support telescopic block and a middle support seat for multi-point lifting. The side is equipped with a side positioning seat and a clamping telescopic block for lateral limiting. The end is equipped with an end positioning support seat and an electromagnetic side positioner for bidirectional positioning. The multi-point uniform support disperses the clamping stress of the aluminum alloy workpiece, avoids deformation of the thin-walled aluminum alloy control arm under pressure, and ensures the accuracy of processing dimensions.

[0017] This utility model of electromagnetic side positioner adopts a hinged end face abutment arm with a ring electromagnet magnetic attraction locking structure. The end face abutment arm can be released when the machining control system controls it to be de-energized, which facilitates the loading and unloading of workpieces. The rubber pad buffers the magnetic attraction impact and reduces positioning bumps and scratches on the workpiece surface.

[0018] All pressing, supporting, positioning and telescopic components of this utility model are controlled by independent pneumatic branches, and the air supply pressure is uniformly adjusted by a pressure reducing valve. The air detection presser has a built-in air detection pipeline that can detect whether the workpiece is in place in real time, eliminating the processing scrap caused by omissions or incomplete pressing, and has a high degree of automation.

[0019] The square fixture main board has beveled guide holes, which allow machining debris to fall directly out, preventing the accumulation of iron filings from affecting the positioning accuracy and extending the fixture maintenance cycle. Attached Figure Description

[0020] The present invention will be further described with reference to the accompanying drawings, but the content of the drawings does not constitute any limitation on the present invention.

[0021] Figure 1 This is a three-dimensional view of the overall structure of a machining fixture for an aluminum alloy automotive control arm, which is equipped with a main board working surface of the automotive control arm body.

[0022] Figure 2 This is a top view of the overall structure of an aluminum alloy automotive control arm machining fixture equipped with an automotive control arm body, according to this utility model.

[0023] Figure 3 This is a three-dimensional view of the overall structure of an aluminum alloy automotive control arm machining fixture without the automotive control arm body assembled.

[0024] Figure 4 This is a partial top view of the aluminum alloy automotive control arm machining fixture of this utility model, before the automotive control arm body is assembled.

[0025] Figure 5 This is a three-dimensional view of the overall structure of an electromagnetic side positioner for a machining fixture for an aluminum alloy automotive control arm according to this utility model.

[0026] from Figures 1 to 5 Including: 1. Square clamp mainboard; 2. Pressure reducing valve; 3. Lifting gear assembly; 4. Clamping components; 5. Vehicle control arm body; 6. Air pressure clamp; 7. Gas detector support base; 8. Bevel guide hole; 9. Bottom support telescopic block; 10. Side positioning seat; 11. Clamping the telescopic block; 12. End positioning support; 13. Electromagnetic side positioner; 14. Mid-position support seat; 15. Electromagnetic positioning base; 16. End face abutment arm; 17. Abutment block; 18. Columnar iron; 19. Rubber pad; 20. Columnar groove; 21. Ring electromagnet; 22. Rotary clamping cylinder; 23. Air pressure plate; 24. Support column; 25. Square support plate; 26. Hanging rings; 27. Fixing plate. Detailed Implementation

[0027] The present invention will be further described in conjunction with the following embodiments.

[0028] Example 1.

[0029] like Figure 1-5 As shown, an aluminum alloy automotive control arm machining fixture includes a square fixture main board 1. A fixing plate 27 is mounted on the outer side of the square fixture main board 1. The fixing plate 27 is used to fix the square fixture main board 1 as a whole on the machine tool worktable. A pressure reducing valve 2 is installed on the side wall of the square fixture main board 1. The pressure reducing valve 2 is connected to a pneumatic drive pipeline embedded inside the square fixture main board 1. The pneumatic drive pipeline is divided into multiple independent pneumatic drive branches to supply air to each pneumatic component. A lifting assembly 3 is installed at the center of the upper surface of the square fixture main board 1. The lifting assembly 3 consists of three vertical support columns 24 fixed at the center of the square fixture main board 1, a square support plate 25 at the top of the support columns 24, and lifting rings 26 installed at the four corners of the square support plate 25. The lifting rings 26 can be used with lifting equipment to lift the entire fixture. Two sets of clamping assemblies 4 are symmetrically arranged on the left and right sides of the lifting assembly 3. Each set of clamping assemblies 4 can clamp an automotive control arm body 5, realizing the simultaneous processing of two workpieces.

[0030] Each clamping assembly 4 includes four pneumatic clamping devices 6 and two pneumatic support seats 7. The four pneumatic clamping devices 6 are arranged in a matrix, with their working ends movably abutting against the outer surface of the vehicle control arm body 5. Each pair of pneumatic clamping devices 6 corresponds to a pneumatic support seat 7, clamping the vehicle control arm body 5 from both above and below. The pneumatic clamping device 6 consists of a rotary clamping cylinder 22 and a pneumatic clamping plate 23. The rotary clamping cylinder 22 is fixedly installed on the square clamping main board 1 and connected to a dedicated pneumatic drive branch. The working end of the rotary clamping cylinder 22 is equipped with the pneumatic clamping plate 23. The rotary clamping cylinder 22 has a pre-embedded pneumatic pipeline, which connects the pneumatic clamping plate 23 to the external pneumatic control system, allowing for real-time detection of the workpiece's contact status.

[0031] The square fixture main board 1 has a vertically opened bevel guide hole 8 directly below each air detection support 7. The iron filings generated during processing are discharged downward through the bevel guide hole 8. Three bottom support telescopic blocks 9 are installed on the outer ring of each bevel guide hole 8. The bottom support telescopic blocks 9 are pneumatic telescopic structures and are independently connected to the pneumatic drive branch to assist in lifting from the bottom of the workpiece. A side positioning seat 10 is installed on the side of each bevel guide hole 8. A clamping telescopic block 11 is mounted on the square fixture main board 1 on the opposite side of the side positioning seat 10. The clamping telescopic block 11 is also an independent pneumatic telescopic structure. The side positioning seat 10 and the clamping telescopic block 11 cooperate with each other to clamp the outer walls of both sides of the car control arm body 5.

[0032] A fixed end positioning support 12 is mounted on the main board 1 of the square fixture. The end face of the end positioning support 12 fits against one end of the car control arm body 5. An electromagnetic side positioner 13 is mounted on the other end of the car control arm body 5 away from the end positioning support 12. A center support 14 is fixed in the middle of each clamping assembly 4 of the main board 1 of the square fixture. The top surface of the center support 14 abuts against the center of the bottom surface of the car control arm body 5 to achieve the middle support of the workpiece and prevent deformation.

[0033] The electromagnetic side positioner 13 includes an electromagnetic positioning base 15, which is locked and fixed on the side positioning seat 10. The upper part of the electromagnetic positioning base 15 is hinged to an end face abutment arm 16. An abutment block 17 is assembled at the free end of the end face abutment arm 16. The abutment block 17 fits against the end of the car control arm body 5. A cylindrical iron 18 is fixed in the middle section of the end face abutment arm 16. A rubber pad 19 is installed on the end face abutment arm 16 near the cylindrical iron 18. A cylindrical groove 20 is opened on the side of the electromagnetic positioning base 15 facing the end face abutment arm 16. A ring electromagnet 21 is embedded in the cylindrical groove 20. When the ring electromagnet 21 is energized, it generates a magnetic attraction force with the cylindrical iron 18 to lock the end face abutment arm 16. The rubber pad 19 is attached to the outside of the ring electromagnet 21 to buffer the magnetic attraction impact. When the machining control system controls it to be de-energized, the magnetic attraction is released, and the end face abutment arm 16 can be rotated around the hinge point to release the workpiece end limit, making it convenient to pick up and put down the car control arm body 5.

[0034] The processing flow of this device is as follows: the square clamp main board 1 is fixed to the machine tool worktable by the fixing plate 27. The external air source is connected to the pressure reducing valve 2 and then introduced into the internal pneumatic drive pipeline. The car control arm body 5 is placed on the air detection support 7, the bottom support telescopic block 9, and the middle support 14 of each set of clamping components 4 by manual or robotic arm. After the device is started, the bottom support telescopic block 9 and the clamping telescopic block 11 cooperate with the corresponding support seat elements to fit the car control arm body 5, and complete the lateral and bottom pre-positioning of the car control arm body 5.

[0035] When the annular electromagnet 21 is energized, it attracts the cylindrical iron 18 and locks the end face of the abutment arm 16. The abutment block 17 and the positioning support seat 12 at the end complete the positioning of the two ends of the workpiece. Then, the rotary clamping cylinder 22 drives the air detection pressure plate 23 to press down. After the air detection system detects that the workpiece is completely attached to the support surface through the air detection pipeline, the machine tool starts cutting.

[0036] After processing, each pneumatic component is reset in sequence, the annular electromagnet 21 is de-energized and releases its end face to abut the arm 16, the bottom support telescopic block 9 extends and lifts the car control arm body 5, and the processed car control arm body 5 can be removed by a robot or manually for cyclic operation. The entire fixture can be lifted and transported as a whole by the lifting ring 26 of the lifting assembly 3 to change the machine tool station.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A machining fixture for an aluminum alloy automotive control arm, characterized in that: The device includes a square clamp main board, which is equipped with a pressure reducing valve. The pressure reducing valve is connected to a pneumatic drive pipeline located inside the square clamp main board. A set of lifting assemblies and two sets of clamping assemblies are mounted on the upper surface of the square clamp main board. The lifting assemblies are mounted at the center of the square clamp main board, and the two sets of clamping assemblies are respectively located on both sides of the lifting assemblies. Each set of clamping assemblies clamps the body of the vehicle control arm. Each clamping assembly includes four air-sensing clamps and two air-sensing support seats mounted on the square clamp main board. The four air-sensing clamps are arranged in a matrix and move against the outside of the vehicle control arm body. Each pair of air-sensing clamps corresponds to one air-sensing support seat and clamps the vehicle control arm body from above and below. A beveled guide hole is vertically opened on the square clamp main board near each air-sensing support seat. Three bottom support telescopic blocks are installed on the outer ring of the square clamp main board near each beveled guide hole. A side positioning seat is installed on the side. A clamping telescopic block is installed on the opposite side of the side positioning seat on the square clamp main board. The side positioning seat and the clamping telescopic block clamp the two sides of the vehicle control arm body. An end positioning support seat is installed on the square clamp main board. The end positioning support seat abuts against one end of the vehicle control arm body. An electromagnetic side positioner is movably abutted against the other end of the vehicle control arm body. A center support seat is installed in the middle of the square clamp main board. The center support seat abuts against the middle of the bottom surface of the vehicle control arm body. The electromagnetic side positioner includes an electromagnetic positioning base, which is mounted on a side positioning seat. An end face abutment arm is hinged to the electromagnetic positioning base. An abutment block is installed at the end of the end face abutment arm, and the abutment block movably abuts against one end of the vehicle control arm body. A cylindrical iron is installed in the middle of the end face abutment arm. A rubber pad is installed on the end face abutment arm near the cylindrical iron. A cylindrical groove is formed on one side of the electromagnetic positioning base near the end face abutment arm. An annular electromagnet is installed inside the cylindrical groove. The annular electromagnet and the cylindrical iron are magnetically matched. The rubber pad movably abuts against the outside of the annular electromagnet.

2. The aluminum alloy automotive control arm machining fixture according to claim 1, characterized in that: The air detection clamping device includes a rotary clamping cylinder, which is mounted on the main board of the square clamp and connected to the corresponding pneumatic drive branch. An air detection clamping plate is installed at the working end of the rotary clamping cylinder. The air detection clamping plate is connected to the air detection pipeline inside the rotary clamping cylinder and is connected to the air detection control system.

3. The aluminum alloy automotive control arm machining fixture according to claim 2, characterized in that: The lifting device assembly includes several support columns, which are vertically installed at the center of the square clamp main board. A square support plate is installed above the support columns, and lifting rings are installed at the four corners of the square support plate.

4. The aluminum alloy automotive control arm machining fixture according to claim 3, characterized in that: Both the bottom support telescopic block and the clamping telescopic block are pneumatic telescopic structures and are independently connected to their respective pneumatic drive branches.

5. The aluminum alloy automotive control arm machining fixture according to claim 4, characterized in that: A fixing plate is installed on the outside of the square fixture main board, and the square fixture main board is mounted on the machine tool worktable through the fixing plate.

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