A positioning and clamping device for a gun breech part

Abstract

The utility model discloses a kind of positioning clamping devices of artillery tail parts, and body is equipped on workbench, and the back of the front side and rear edge of body top is fixed with a supporting body;Positioning plate B is fixed with the back of the front side supporting body of body top, and two compression screws b are in the supporting body of body top rear side;Two positioning plates A are fixed with the top of body between two supporting bodies;Body top left and right ends are respectively fixed with a double-end stud, and the top end of double-end stud has shoulder hexagon nut, and the gap cooperation of the pressing plate below shoulder hexagon nut passes through double-end stud;Outside double-end stud, adjustable support bottom is fixed with body, and the lower end of adjustable support has a small hexagon nut;The top of adjustable support is below pressing plate, and two double-end studs are between two adjustable supports.The utility model does not need to draw line and find right, and positioning is reliable, clamping is stable, groove and hole on four surfaces of workpiece can be processed once clamping, effectively improve processing efficiency.

Description

Technical Field

[0001] This utility model relates to a positioning and clamping device for artillery breech parts, belonging to the field of mechanical technology. Background Technology

[0002] One crucial component in artillery products is the breech, a large and complex part that is difficult to manufacture. It is cubic in shape with a square through-hole in the center, requiring the machining of intricate grooves and holes on all its surfaces (as shown in the instruction manual). Figure 11 —Appendix Figure 14 As shown in the figure), the machining scheme for this gun breech part during the research and development stage was to align and clamp it on a conventional milling machine and a conventional boring machine, and then machine the grooves and holes on each surface separately. After the trial production was successful, the product was transferred to mass production. The machining process was relatively complex and cumbersome, and the production efficiency was not high, which affected the production progress and economic benefits. In order to improve the production efficiency, the machining scheme adopted a newly introduced machining center (with tool magazine), but there was no matching special fixture. Therefore, a positioning and clamping device for the gun breech part was designed. Utility Model Content

[0003] To overcome the shortcomings of the existing technology, this utility model provides a positioning and clamping device for artillery breech parts. This device does not require scribing and alignment, and the positioning is reliable and the clamping is stable. The grooves and holes on the four surfaces of the workpiece can be processed in one clamping, which effectively improves the processing efficiency.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a positioning and clamping device for artillery breech parts, including a body, a movable set screw seat, a clamping screw a, a clamping screw b, a positioning plate A, a pressure plate, a positioning plate B, and an adjustable support column. The body is a cast-formed skeleton-type cuboid base. The body is installed on a workbench. A protruding support body is fixedly connected to the front edge and the rear edge of the top of the body. A horizontally oriented elongated positioning plate B is fixedly installed on the back of the front support body of the top of the body by screw II and pin. Two horizontally oriented clamping screws b are provided in the rear support body of the top of the body. Between the two supports bodies, two spaced positioning plates A are fixedly connected to the top of the body by screw I.

[0005] The top left and right ends of the main body are respectively fixedly connected to a vertical double-headed stud. The top of the double-headed stud is threaded to a shouldered hexagonal nut. The long strip pressure plate below the shouldered hexagonal nut passes through the double-headed stud with a clearance fit.

[0006] On the outside of the double-ended studs, the bottom of the vertically adjustable support is fixedly connected to the body. A small hexagonal nut is threaded to the lower end of the adjustable support, which secures the adjustable support. The top of the adjustable support rests against the bottom of the pressure plate, and the two double-ended studs are located between the two adjustable supports.

[0007] Furthermore, two bushings are installed in the rear support body at the top of the main body, and a horizontal clamping screw b is threaded into each bushing.

[0008] Furthermore, a circular mounting hole is provided at each of the four corners of the upper surface of the body. The four mounting holes on the body are aligned with the groove of the machine tool table, and the body is fixed to the machine tool table by bolts.

[0009] Furthermore, on the rear side of the main body, two spaced L-shaped movable set screw seats are installed in the groove of the machine tool worktable. Each movable set screw seat has a clamping screw a threadedly connected to the center of its vertical surface slightly above the center. The clamping screw a and the clamping screw b are oriented in the same direction.

[0010] Furthermore, horizontal lifting bolts are threaded onto both the left and right sides of the main body, with two spaced-apart lifting bolts on each side.

[0011] The beneficial effects of this utility model are: in the mass production of parts, this utility model saves the auxiliary time for alignment and clamping. When the workpiece is installed on this utility model, the positioning is reliable and the clamping is stable. It realizes that the milling and boring of the four surfaces of the workpiece can be completed by rotating the machine tool table in one clamping, which effectively improves the production efficiency. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is the front view of the present invention in use.

[0015] Figure 3 yes Figure 2 Top view.

[0016] Figure 4 yes Figure 2 The left view.

[0017] Figure 5 This is the front view of the main body of this utility model.

[0018] Figure 6 yes Figure 5 Top view.

[0019] Figure 7 yes Figure 5 The left view.

[0020] Figure 8 yes Figure 7A schematic diagram of direction A.

[0021] Figure 9 This is a front view of the movable set screw seat of this utility model.

[0022] Figure 10 yes Figure 9 The left view.

[0023] Figure 11 This is a schematic diagram of the front of the workpiece.

[0024] Figure 12 This is a schematic diagram of the left side of the workpiece.

[0025] Figure 13 This is a schematic diagram of the right side of the workpiece.

[0026] Figure 14 This is a schematic diagram of the back of the workpiece.

[0027] Numbering on the map: 1. Body; 101. Support body; 2. Lifting bolt; 3. Movable set screw seat; 4. Clamping screw a; 5. Bushing; 6. Clamping screw b; 7. Positioning plate A; 8. Screw I; 9. Shoulder hex nut; 10. Double-ended stud; 11. Pressure plate; 12. Adjustable support column; 13. Small hex nut; 14. Positioning plate B; 15. Pin; 16. Screw II; 17. Workpiece bottom surface; 18. Workpiece front surface; 19. Workpiece rear surface; 20. Workpiece left surface; 21. Workpiece right surface; 22. Mounting hole; 23. Worktable; 24. Reference bar. Detailed Implementation

[0028] like Figure 1 As shown in Figure 14, a positioning and clamping device for a cannon breech component includes a body 1, a movable set screw seat 3, a clamping screw a4, a clamping screw b6, a positioning plate A7, a pressure plate 11, a positioning plate B14, and an adjustable support column 12. The body 1 is a cast-formed skeleton-type cuboid base. A circular mounting hole 22 is provided at each of the four corners of the upper surface of the body 1. The four mounting holes 22 on the body 1 are aligned with the groove of the machine tool worktable 23. The body 1 is fixed to the machine tool worktable 23 by bolts. Horizontal lifting bolts 2 are threaded on both the left and right sides of the body 1, and two spaced-apart lifting bolts 2 are connected to each side.

[0029] A protruding support body 101 is fixedly connected to both the front and rear edges of the top of the main body 1. A horizontally oriented elongated positioning plate B14 is fixedly installed on the back of the front support body 101 of the top of the main body 1 by screw II 16 and pin 15. Two bushings 5 ​​are installed in the rear support body of the top of the main body 1, and a horizontally oriented clamping screw b6 is threaded into each bushing 5. Between the two supports, two spaced positioning plates A7 are fixedly connected to the top of the main body 1 by screw I 8.

[0030] The top left and right ends of the main body 1 are respectively fixedly connected to a vertical double-headed stud 10. The top of the double-headed stud 10 is threadedly connected to a shouldered hexagonal nut 9. The long strip pressure plate 11 below the shouldered hexagonal nut 9 passes through the double-headed stud 10 with clearance fit.

[0031] On the outside of the double-headed stud 10, the bottom of the vertical adjustable support 12 is fixedly connected to the body 1. A small hexagonal nut 13 is threaded to the lower end of the adjustable support 12. The small hexagonal nut (13) tightens the adjustable support (12). The top of the adjustable support 12 rests against the bottom of the pressure plate 11. The two double-headed studs 10 are located between the two adjustable supports 12.

[0032] On the rear side of the main body 1, two spaced L-shaped movable set screw seats 3 are installed in the groove of the machine tool worktable 23. A clamping screw a4 is threaded to the center of the vertical surface of each movable set screw seat 3. The clamping screw a4 and the clamping screw b6 face the same direction and clamp the workpiece together. When machining the lower hole at the rear 19 of the workpiece, the two clamping screws b6 are loosened and the two movable set screw seats 3 are removed from the groove. Only after they are removed can the machining of the rear 19 of the workpiece be completed.

[0033] In use, first install the device onto the machine tool worktable 23 of the machining center, and hoist the device by passing steel wire ropes through four lifting bolts 2; then install bolts through the four mounting holes 22 on the main body 1 to fasten the main body 1 to the machine tool worktable 23; after adjusting the reference bar 24 in front of the main body 1, input the angle compensation value in the machine tool control panel, and the fixture installation is complete; place the workpiece into the device, and complete the workpiece clamping by following these steps: Step 1: Use a feeler gauge to check the gap between the bottom surface 17 of the workpiece and the positioning plate A7; Step 2: Move the two movable set screw seats 3 from the groove of the machine tool worktable 23 to the position shown in the figure, tighten the clamping screws a4 on the two movable set screw seats 3 and the two clamping screws b6 on the rear support body 101 of the body 1, place the front 18 of the workpiece against the fixture positioning plate B14, and check the gap between the two with a feeler gauge. Step 3: Place the pressure plate 11 into the square through groove of the workpiece at both ends, and tighten the shouldered hexagonal nuts 9 to assist in pressing the workpiece.

[0034] During machining, the rotary machine tool table 23 automatically adjusts the tool according to the program to complete the machining of the grooves and holes on the front 18, left side 20, right side 21, and rear side 19 of the workpiece. Among them, since the hole at a lower position needs to be machined on the rear side 19 of the workpiece, space needs to be made in the position of the movable set screw seat 3. When machining this hole, the two movable set screw seats 3 must be removed first. The method is to loosen the two clamping screws a4 and move the two movable set screw seats 3 out of the groove of the machine tool table for machining.

Claims

1. A positioning and clamping device for a cannon breech component, characterized in that: The system includes a main body (1), a movable set screw seat (3), a clamping screw a (4), a clamping screw b (6), a positioning plate A (7), a pressure plate (11), a positioning plate B (14), and an adjustable support column (12). The main body (1) is a cast skeleton-type cuboid base. The main body (1) is installed on the workbench (23). A protruding support body (101) is fixedly connected to the front edge and the rear edge of the top of the main body (1). A horizontally oriented long strip positioning plate B (14) is fixedly installed on the back of the front support body (101) of the top of the main body (1) by screw II (16) and pin (15). Two horizontally oriented clamping screws b (6) are provided in the rear support body (101) of the top of the main body (1). Between the two support bodies (101), two spaced positioning plates A (7) are fixedly connected to the top of the main body (1) by screw I (8). The top left and right ends of the main body (1) are respectively fixedly connected to a vertical double-headed stud (10). The top of the double-headed stud (10) is threadedly connected to a shouldered hexagonal nut (9). The long strip pressure plate (11) below the shouldered hexagonal nut (9) passes through the double-headed stud (10) with clearance fit. On the outside of the double-ended stud (10), the bottom of the vertical adjustable support (12) is fixedly connected to the body (1). A small hexagonal nut (13) is threaded to the lower end of the adjustable support (12), and the small hexagonal nut (13) tightens the adjustable support (12). The top of the adjustable support (12) rests against the bottom of the pressure plate (11), and the two double-ended studs (10) are located between the two adjustable supports (12).

2. A positioning and clamping device for a breechblock part of a gun according to claim 1, characterized in that: Two bushings (5) are installed in the rear support of the top of the main body (1), and a horizontal clamping screw b (6) is threaded into each bushing (5).

3. The positioning and clamping device for a cannon breech component according to claim 1, characterized in that: A circular mounting hole (22) is provided at each of the four corners of the upper surface of the main body (1). The four mounting holes (22) on the main body (1) are aligned with the groove of the machine tool table (23). The main body (1) is fixed to the machine tool table (23) by bolts.

4. The positioning and clamping device for a gun breech component according to claim 1, characterized in that: On the rear side of the main body (1), two L-shaped movable set screw seats (3) are installed in the groove of the machine tool worktable (23) at intervals. A clamping screw a (4) is threaded at the center of the vertical surface of each movable set screw seat (3) slightly above the center. The clamping screw a (4) and the clamping screw b (6) face the same direction.

5. A positioning and clamping device for a gun breech component according to claim 1, characterized in that: The main body (1) has horizontal lifting bolts (2) threaded on both the left and right sides, with two spaced-apart lifting bolts (2) on each side.

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