Special tool for linear cutting of convex seat

Abstract

The utility model relates to a special tool for linear cutting of a convex seat, which comprises a bottom plate and a clamping mechanism and is characterized in that a part fixing seat and a clamp fixing seat are fixed on the upper surface of the bottom plate at intervals, a horizontal positioning pin is fixed on one side of the part fixing seat, and the clamping mechanism comprises a driving handle, a fork-shaped pressure head, a push-pull handle, a double-lug connecting frame and a connecting rod. When the driving handle is pushed forwards to a front dead center, the front portion of the fork-shaped pressing head is clamped on the outer side of the horizontal positioning pin, the diameter of the horizontal positioning pin is equal to the inner diameter of a boss to be machined, and a gap for clamping the cylindrical section of the boss is formed between the periphery of the horizontal positioning pin and the inner wall of the fork-shaped pressing head. And a gap for clamping the expanding section of the convex seat is formed between the side end surface of the fork-shaped pressure head and the side surface of the part fixing seat. According to the tool, the cutting precision is guaranteed, the part size is guaranteed, meanwhile, the manual alignment and debugging time is saved, and the machining efficiency is remarkably improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of manufacturing of aero-engine parts, and particularly relates to a special tooling for wire cutting of a convex seat. Background Art

[0002] The existing operation method for wire cutting parts is as follows: place the part on the processing platform, fix the part with a clamp or a magnet, and then perform wire cutting.

[0003] This operation method has the following problems: 1. For sheet metal stretched parts such as convex seats, if the surface is uneven and there is a large gap with the platform, it will lead to unstable positioning, affect the cutting accuracy, and affect the qualification rate of parts; 2. Due to unstable positioning, it is necessary to debug the wire cutting program before processing each batch of parts, which is time-consuming and laborious. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a special tooling for wire cutting of a convex seat with reasonable structure and reliable use to solve the above problems, ensure the cutting accuracy, ensure the part size, save the time of manual straightening and debugging at the same time, and significantly improve the processing efficiency.

[0005] The technical solution of the utility model is as follows:

[0006] A special tooling for wire cutting of a convex seat includes a bottom plate and a clamping mechanism. The technical key points are: on the upper surface of the bottom plate, a part fixing seat and a clamp fixing seat are fixedly arranged at intervals. A horizontal positioning pin is fixed on one side of the part fixing seat. The clamping mechanism includes a driving handle, a fork-shaped pressing head, a push-pull handle connected to the root of the fork-shaped pressing head, a double-ear connecting frame arranged on one side of the clamp fixing seat, and a connecting rod hinged to one connecting ear of the double-ear connecting frame. Two hinge shafts are arranged at intervals at the root of the push-pull handle, and two hinge shafts are arranged at intervals at the front end of the driving handle. The other end of the connecting rod is hinged to the first hinge shaft at the front end of the driving handle. The other connecting ear of the double-ear connecting frame is hinged to the first hinge shaft of the push-pull handle. The second hinge shaft at the front end of the driving handle is hinged to the second hinge shaft of the push-pull handle. When the driving handle is pushed forward to the front stop point, the front part of the fork-shaped pressing head is clamped outside the horizontal positioning pin. The diameter of the horizontal positioning pin is equal to the inner diameter of the convex seat to be processed. A gap for clamping the cylindrical section of the convex seat is formed between the outer circumference of the horizontal positioning pin and the inner wall of the fork-shaped pressing head. A gap for clamping the enlarged diameter section of the convex seat is formed between the side end face of the fork-shaped pressing head and the side face of the part fixing seat.

[0007] For the above-mentioned special tooling for wire cutting of a convex seat, an arc transition is used between the side end face of the fork-shaped pressing head close to the part fixing seat and the inner wall.

[0008] For the above-mentioned special tooling for convex seat wire cutting, a long hole is provided along the length direction of the push-pull handle. A convex block inserted into the long hole is provided on the side of the root of the fork-shaped pressing head. A threaded hole is provided on the top surface of the convex block. The tip of the locking screw passes through the long hole and is fixedly connected to the threaded hole.

[0009] For the above-mentioned special tooling for convex seat wire cutting, a limit buckle plate is provided between the nut of the locking screw and the side end face of the push-pull handle.

[0010] For the above-mentioned special tooling for convex seat wire cutting, the side of the part fixing seat where the horizontal positioning pin is set is an arc surface, and an avoidance notch for preventing interference with the cutting operation is provided on one side of the arc surface.

[0011] The beneficial effects of the present utility model are as follows:

[0012] 1. During use, the convex seat is sleeved on the horizontal positioning pin, and the driving handle is pushed. The fork-shaped pressing head is driven by the four-bar linkage mechanism composed of the double-ear connecting frame, the connecting rod, the push-pull handle and the driving handle to clamp the convex seat, ensuring the stable positioning of the convex seat and preventing the unstable positioning caused by uneven surface, thereby ensuring the cutting accuracy, ensuring the part size, saving the time of manual straightening and debugging, and significantly improving the processing efficiency.

[0013] 2. Pull the driving handle to release the restraint on the convex seat, and then the convex seat can be removed. The assembly and disassembly are convenient and fast, significantly improving the processing efficiency. Description of the Drawings

[0014] Figure 1 is the structural schematic diagram of the present utility model;

[0015] Figure 2 is the perspective view of the present utility model;

[0016] Figure 3 is Figure 1 the sectional view taken along the A-A direction in ;

[0017] Figure 4 is Figure 1 the enlarged view of part I in ;

[0018] Figure 5 is Figure 1 the perspective view of the fork-shaped pressing head in ;

[0019] Figure 6 is the plan view of the fork-shaped pressing head;

[0020] Figure 7 is Figure 6 the sectional view taken along the B-B direction in.

[0021] In the figure: 1. Bottom plate, 1001. Avoidance groove, 2. Part fixing seat, 3. Clamp fixing seat, 4. Double-ear connecting frame, 5. Driving handle, 6. Link rod, 7. Push-pull handle, 8. Locking screw, 9. Limit buckle plate, 10. Fork-shaped pressing head, 11. Horizontal positioning pin, 12. Avoidance notch, 13. Convex seat, 1301. Cutting position, 14. Convex block, 15. Threaded hole. Detailed implementation mode

[0022] The present utility model will be described in detail according to the attached drawings of the specification.

[0023] As Figures 1 to 7 shown, this special tooling for wire cutting of the convex seat includes a bottom plate 1 and a clamping mechanism.

[0024] Among them, the part fixing seat 2 and the clamp fixing seat 3 are fixedly spaced on the upper surface of the bottom plate 1, and a horizontal positioning pin 11 is fixed on one side of the part fixing seat 2.

[0025] The clamping mechanism includes a driving handle 5, a fork-shaped pressing head 10, a push-pull handle 7 connected to the root of the fork-shaped pressing head 10, a double-ear connecting frame 4 arranged on one side of the clamp fixing seat 3, and a link rod 6 hinged to one connecting ear of the double-ear connecting frame 4. Two hinge shafts are arranged at intervals at the root of the push-pull handle 7, two hinge shafts are arranged at intervals at the front end of the driving handle 5, the other end of the link rod 6 is hinged to the first hinge shaft at the front end of the driving handle 5, the other connecting ear of the double-ear connecting frame 4 is hinged to the first hinge shaft of the push-pull handle 7, and the second hinge shaft at the front end of the driving handle 5 is hinged to the second hinge shaft of the push-pull handle 7. When the driving handle 5 is pushed forward to the front stop point, the front part of the fork-shaped pressing head 10 is clamped outside the horizontal positioning pin 11. The diameter of the horizontal positioning pin 11 is equal to the inner diameter of the convex seat 13 to be processed. A gap for clamping the cylindrical section of the convex seat 13 is formed between the outer circumference of the horizontal positioning pin 11 and the inner wall of the fork-shaped pressing head 10, and a gap for clamping the enlarged diameter section of the convex seat 13 is formed between the side end face of the fork-shaped pressing head 10 and the side face of the part fixing seat 2.

[0026] In this embodiment, the side end face and the inner wall of the fork-shaped pressing head 10 close to the part fixing seat 2 are transitioned by an arc to stably connect with the convex seat 13. A long hole is arranged along the length direction of the push-pull handle 7, a convex block 14 inserted into the long hole is arranged on the side of the root of the fork-shaped pressing head 10, a threaded hole 15 is arranged on the top surface of the convex block 14, and the tip of the locking screw 8 passes through the long hole and is connected and fixed to the threaded hole 15. A limit buckle plate 9 is arranged between the nut of the locking screw 15 and the side end face of the push-pull handle 7. The arrangement of the long hole facilitates the adjustment of the position of the fork-shaped pressing head 10. The side face of the part fixing seat 2 provided with the horizontal positioning pin 11 is an arc surface, and an avoidance notch 12 for preventing interference with the cutting operation is arranged on one side of the arc surface. An avoidance groove 1001 corresponding to the avoidance notch 12 is arranged on the bottom plate 1.

[0027] Working principle:

[0028] Before use, fix the part fixing base 2 and the clamp fixing base 3 to the bottom plate 1 with hexagon socket head cap screws, connect the four-bar linkage mechanism composed of the double-ear connecting frame 4, the connecting rod 6, the push-pull handle 7 and the driving handle 5, and fix the fork-shaped pressure head 10 to the push-pull handle 7 with the locking screw 8.

[0029] During use, sleeved the convex seat 13 on the horizontal positioning pin 11, push the driving handle 5 to make the fork-shaped pressure head 10 clamp the convex seat 13, and make it stably positioned on the horizontal positioning pin 11 to avoid axial and radial displacements.

[0030] After positioning, perform wire cutting. The cutting position 1301 is shown in Figure 4 .

[0031] The above has described the embodiments of the present invention in detail, but the above content is only the preferred embodiments of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention shall still fall within the scope covered by this patent.

Claims

1. A tool for cutting a cam, comprising a base plate and a clamping mechanism, characterized in that: The upper surface of the bottom plate is fixed with a part fixing seat and a clamp fixing seat at intervals, a horizontal positioning pin is fixed on one side of the part fixing seat, the clamping mechanism includes a driving handle, a fork-shaped pressure head, a push-pull handle connected to the root of the fork-shaped pressure head, a double-ear connecting frame arranged on one side of the clamp fixing seat, and a connecting rod hinged to a connecting ear of the double-ear connecting frame, the root of the push-pull handle is provided with two hinge shafts at intervals, the front end of the driving handle is provided with two hinge shafts at intervals, the other end of the connecting rod is hinged to the first hinge shaft at the front end of the driving handle, and the double-ear connecting frame is provided with a hinge shaft at intervals. Another connecting ear of the connecting frame is hinged to the first hinge axis of the push-pull handle, and the second hinge axis at the front end of the driving handle is hinged to the second hinge axis of the push-pull handle. When the driving handle is pushed forward to the front dead point, the front part of the fork-shaped pressing head is clamped on the outside of the horizontal locating pin, and the diameter of the horizontal locating pin is equal to the inner diameter of the convex seat to be processed. A gap of the cylindrical section of the clamping convex seat is formed between the outer periphery of the horizontal locating pin and the inner wall of the fork-shaped pressing head, and a gap of the expanded diameter section of the clamping convex seat is formed between the side end surface of the fork-shaped pressing head and the side surface of the part fixing seat.

2. The tooling for wire cutting of bosses according to claim 1 is characterized in that: The side end surface of the fork-shaped pressing head close to the part fixing seat and the inner wall are transitioned by an arc.

3. The tooling for wire cutting of bosses according to claim 1 is characterized in that: The push-pull handle is provided with a long hole along its length direction, the root side of the fork-shaped pressure head is provided with a protrusion inserted into the long hole, the top surface of the protrusion is provided with a threaded hole, and the tip of the locking screw passes through the long hole and is connected and fixed with the threaded hole.

4. The tooling for protruding seat wire cutting according to claim 3 is characterized in that: A limiting buckle plate is arranged between the locking screw nut and the side end surface of the push-pull handle.

5. The tooling for protruding seat wire cutting according to claim 1 is characterized in that: The side surface of the part fixing seat on which the horizontal positioning pin is arranged is an arc surface, and one side of the arc surface is provided with an avoidance notch to prevent interference with the cutting operation.

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