Special fixture for milling buffer box body

Abstract

The invention discloses a special fixture for milling a buffer box body, and belongs to the technical field of special fixtures for milling. The clamping mechanisms are arranged, the two oppositely-arranged clamping mechanisms clamp the upper end and the lower end of the buffer box body at the same time, the rotating mounting plate is driven by the driving motor to rotate, rotation of the buffer box body can be achieved, the clamping mechanisms are used for clamping the buffer box body, and the clamping efficiency is improved. A plurality of box bodies in the same batch can be machined at the same time on a traditional single-head or double-head planer type milling machine, machining of the four surfaces of the buffer box bodies can be achieved without repeated clamping, and the machining efficiency is greatly improved; through cooperation of the square positioning block and the positioning oil cylinder, the buffer box body is prevented from rotating in the machining process, the machining precision can be further improved, the positioning oil cylinder abuts against the square direction quickly, the rotating precision of the buffer box body can be improved, and the machining precision is further improved.

Description

Technical Field

[0001] The invention belongs to the technical field of special fixtures for milling, and in particular relates to a special fixture for milling a buffer box. Background Art

[0002] With the increase in the operating speed and traction tonnage of my country's railway freight vehicles, the corresponding accuracy of vehicle body structures such as vehicle traction beams, couplers, and tail frames needs to be continuously improved during the manufacturing process. During the operation of the buffer, due to the relative movement between the side of the buffer box and the traction beam, the coordination between the two needs to be very precise to avoid lateral clearance displacement during the relative movement, resulting in high-frequency load impacts between each other, causing wear of the buffer box, shortening its service life, and posing a safety hazard to railway transportation.

[0003] Traditionally, when processing the four mating surfaces of the buffer box, when a traditional milling machine is used for processing, the transmission clamping method can only mill two surfaces at the same time, and the other two surfaces need to be re-clamped for processing. Although this processing method can process multiple boxes at the same time, due to the repeated clamping, the verticality between the two processed surfaces cannot be guaranteed, and the processing efficiency is low; when a machining center is used for processing, the four surfaces can be directly processed at the same time, but due to the limitation of the machining center workbench, it is difficult to process multiple parts at the same time, resulting in the processing efficiency still not being greatly improved. Summary of the invention

[0004] The present invention mainly solves the technical problems existing in the above-mentioned prior art and provides a special fixture for milling a buffer box.

[0005] The above-mentioned technical problem of the present invention is mainly solved by the following technical scheme: a special fixture for milling a buffer box body, comprising two groups of clamping mechanisms symmetrically arranged up and down, the clamping mechanism comprising a connecting plate, a connecting seat is provided on the upper surface of the front side of the connecting plate, a driving motor is provided on the upper surface of the rear side of the connecting plate, the driving shaft of the driving motor extends to the lower side of the connecting plate, and a driving pulley is fixedly connected to the driving shaft of the driving motor, a rotating seat is provided on the lower surface of the connecting plate corresponding to the connecting seat, a rotating mounting plate is provided at the bottom of the rotating seat, a driven pulley is fixedly connected to the rotating seat on the upper side of the rotating mounting plate, a transmission belt is connected between the driving pulley and the driven pulley, the driving motor rotates and drives the rotating seat to rotate through the transmission belt, a mounting seat is provided on the lower side of the rotating mounting plate, the mounting seat is fixedly connected to the rotating mounting plate, two clamping cylinders are provided in the mounting seat, the two clamping cylinders are arranged in reverse front and back, and a clamping pressure seat is provided on the protruding ends of the two clamping cylinders.

[0006] Preferably, the rotating mounting plate includes a square positioning block arranged on its upper surface, and the front and rear end surfaces of the square positioning block are aligned with the front and rear ends of the clamping cylinder.

[0007] Preferably, a positioning cylinder is provided on both sides of the left and right sides of the square positioning block, the protruding end of the positioning cylinder is aligned with the height of the square positioning block, and a positioning tightening block is provided on the protruding end of the positioning cylinder.

[0008] Preferably, the outer end surface of the clamping seat is provided with an anti-slip wear-resistant rubber pad.

[0009] Preferably, a pipe penetration hole for passing the hydraulic oil pipe is provided on the rotating mounting plate at a position corresponding to the clamping cylinder.

[0010] Preferably, the lower end of the mounting seat is in an inverted cone shape, and the inverted cone structure can play a positioning role when extending into the buffer box body.

[0011] The connection seat arranged on the connection plate is used for connecting the oil cylinder for controlling the movement of the clamping mechanism.

[0012] The beneficial effects of the present invention are as follows: by setting a clamping mechanism, two groups of oppositely arranged clamping mechanisms clamp the upper and lower ends of the buffer box at the same time, and the rotating mounting plate is driven by a driving motor to rotate, so that the buffer box can be rotated. The buffer box is clamped by the clamping mechanism, and multiple boxes of the same batch can be processed simultaneously on a traditional single-head or double-head gantry milling machine, and the four surfaces of the buffer box can be processed without repeated clamping, which greatly improves the processing efficiency; by setting a square positioning block and a positioning cylinder to cooperate, the buffer box is prevented from rotating during the processing, which can further improve the processing accuracy, and the positioning cylinder presses the square orientation block tightly, which can also improve the rotation accuracy of the buffer box, further improving the processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention;

[0014] Figure 2 It is a structural schematic diagram of the clamping mechanism of the present invention.

[0015] In the figure: 1. Clamping mechanism; 2. Connecting plate; 3. Connecting seat; 4. Driving motor; 5. Active pulley; 6. Rotating seat; 7. Rotating mounting plate; 8. Driven pulley; 9. Transmission belt; 10. Mounting seat; 11. Clamping cylinder; 12. Clamping pressure seat; 13. Square positioning block; 14. Positioning cylinder; 15. Positioning tightening block; 16. Wear-resistant rubber pad; 17. Pipe penetration hole. DETAILED DESCRIPTION

[0016] The technical solution of the present invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0017] Embodiment: A special fixture for milling a buffer housing, such as Figure 1-Figure 2 As shown, it includes two groups of clamping mechanisms 1 symmetrically arranged up and down, the clamping mechanism 1 includes a connecting plate 2, a connecting seat 3 is provided on the upper surface of the front side of the connecting plate 2, a driving motor 4 is provided on the upper surface of the rear side of the connecting plate 2, the driving shaft of the driving motor 4 extends to the lower side of the connecting plate 2, and a driving pulley 5 is fixedly connected to the driving shaft of the driving motor 4, a rotating seat 6 is provided on the lower surface of the connecting plate 2 corresponding to the connecting seat 3, a rotating mounting plate 7 is provided at the bottom of the rotating seat 6, a driven pulley 8 is fixedly connected to the rotating seat 6 on the upper side of the rotating mounting plate 7, a transmission belt 9 is connected between the driving pulley 5 and the driven pulley 8, the driving motor 4 rotates and drives the rotating seat 6 to rotate through the transmission belt 9, a mounting seat 10 is provided on the lower side of the rotating mounting plate 7, the mounting seat 10 is fixedly connected to the rotating mounting plate 7, two clamping cylinders 11 are provided in the mounting seat 10, the two clamping cylinders 11 are arranged in reverse front and back, and a clamping pressure seat 12 is provided on the protruding ends of the two clamping cylinders 11.

[0018] The rotating mounting plate 7 includes a square positioning block 13 arranged on its upper surface, and the front and rear end surfaces of the square positioning block 13 are aligned with the front and rear directions of the clamping cylinder 11; a positioning cylinder 14 is provided on both sides of the left and right sides of the square positioning block 13, and the protruding end of the positioning cylinder 14 is aligned with the height of the square positioning block 13, and a positioning clamping block 15 is provided on the protruding end of the positioning cylinder 14.

[0019] The outer end surface of the clamping seat 12 is provided with a non-slip and wear-resistant rubber pad 16; a through-hole 17 for passing the hydraulic oil pipe is opened at a position corresponding to the clamping cylinder 11 on the rotating mounting plate 7; the lower end of the mounting seat 10 is in an inverted cone shape, and the inverted cone structure can play a positioning role when extending into the buffer box body; the connecting seat 3 arranged on the connecting plate 2 is used to connect the cylinder that controls the movement of the clamping mechanism 1.

[0020] The principle of the present invention is as follows: when in use, it is necessary to pre-connect the oil cylinder for controlling the movement of the clamping mechanism 1 to the connecting seat 3. The two sets of clamping mechanisms 1 can be set horizontally or vertically. When processing with a traditional vertical milling machine, the horizontal setting can be adopted. When using a side milling machine, the vertical setting can be rotated. When processing, multiple sets can be set in parallel. When processing, the buffer box is placed in the two sets of clamping mechanisms 1, and the oil cylinder is controlled to extend to clamp the buffer box up and down using the mounting seat 10. After it is in place, the two clamping oil cylinders 11 are controlled to extend to clamp the buffer box from the inside. The positioning cylinder 14 is controlled to be extended to prevent shaking, and the positioning and tightening block 15 is pressed against the square positioning block 13 to achieve positioning and prevent rotation. At this time, the buffer box can be milled by the milling machine. After completing one milling, the two positioning cylinders 14 are retracted, and the driving motor 4 rotates to drive the rotating seat 6 to rotate 90°. After completion, the positioning cylinder 14 is controlled to be extended again for tightening, and the operation is repeated to finally complete the processing of the buffer box. When single-head milling is used, four rotations are required, and when double-head milling is used, only one rotation is required to complete the processing.

[0021] Finally, it should be pointed out that the above embodiments are only representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments, and there are many variations. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention should be considered to belong to the protection scope of the present invention.

Claims

1. A special fixture for milling a buffer housing, comprising two sets of clamping mechanisms (1) symmetrically arranged in an upper and lower direction, characterized in that: The clamping mechanism (1) comprises a connecting plate (2), a connecting seat (3) is provided on the upper surface of the front side of the connecting plate (2), a driving motor (4) is provided on the upper surface of the rear side of the connecting plate (2), a driving shaft of the driving motor (4) extends to the lower side of the connecting plate (2), and a driving pulley (5) is fixedly connected to the driving shaft of the driving motor (4), a rotating seat (6) is provided on the lower surface of the connecting plate (2) corresponding to the connecting seat (3), a rotating mounting plate (7) is provided at the bottom of the rotating seat (6), and the rotating seat (6) on the upper side of the rotating mounting plate (7) A driven pulley (8) is fixedly connected to the rotating seat (6), a transmission belt (9) is connected between the driving pulley (5) and the driven pulley (8), the driving motor (4) rotates to drive the rotating seat (6) to rotate through the transmission belt (9), a mounting seat (10) is provided on the lower side of the rotating mounting plate (7), the mounting seat (10) is fixedly connected to the rotating mounting plate (7), two clamping cylinders (11) are arranged in the mounting seat (10), the two clamping cylinders (11) are arranged in reverse front and back, and a clamping pressure seat (12) is provided on the protruding end of the two clamping cylinders (11).

2. A special fixture for milling a buffer housing according to claim 1, characterized in that: The rotating mounting plate (7) comprises a square positioning block (13) arranged on its upper surface, and the front and rear end surfaces of the square positioning block (13) are arranged to be aligned with the front and rear ends of the clamping cylinder (11).

3. A special fixture for milling a buffer housing according to claim 2, characterized in that: A positioning oil cylinder (14) is provided on both the left and right sides of the square positioning block (13), the protruding end of the positioning oil cylinder (14) is aligned with the height of the square positioning block (13), and a positioning tightening block (15) is provided on the protruding end of the positioning oil cylinder (14).

4. The special fixture for milling a buffer housing according to claim 1, characterized in that: The outer end surface of the clamping seat (12) is provided with an anti-skid wear-resistant rubber pad (16).

5. The special fixture for milling a buffer housing according to claim 1, characterized in that: A pipe penetration hole (17) for passing a hydraulic oil pipe is provided at a position on the rotating mounting plate (7) corresponding to the clamping oil cylinder (11).

6. The special fixture for milling a buffer housing according to claim 1, characterized in that: The lower end of the mounting seat (10) is in an inverted cone shape, and the inverted cone structure can play a positioning role when extending into the buffer box body.

7. The special fixture for milling a buffer housing according to claim 1, characterized in that: The connection seat (3) provided on the connection plate (2) is used to connect to the oil cylinder that controls the movement of the clamping mechanism (1).

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