Hob wire cutting chip flute clamp

Abstract

The utility model discloses a hob linear cutting chip flute clamp which comprises a supporting body, the supporting body comprises a base, a core hole is formed in the base, two strip-shaped wing plates are arranged on the periphery of the base, and a connecting block is arranged at the end of each wing plate. A positioning core part is arranged at one end of the core shaft, and a connecting screw hole is formed in the center of the positioning core part; the device further comprises a screw, the screw comprises a threaded connecting part, a nut is arranged on the threaded connecting part, and the threaded connecting part is sleeved with a gasket. The cutter has the advantages that the blade grooves to be cut can avoid cutting metal wires such as molybdenum wires or copper wires through the biased strip-shaped wing plates, after the cutter body is clamped, a plurality of sets of blade grooves are cut in the cutter body at a time through linear cutting, and meanwhile the good connecting and supporting effects can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of gear manufacturing, in particular to a hob wire cutting chip groove fixture. Background Art

[0002] Gears are the most common parts in the mechanical field. Without gears, many machines will not work. The gear tooth processing method is one of the key steps in the gear processing technology. The gear processing technology includes two categories: chipless processing and cutting processing. The cutting processing method can be divided into two types: forming method and generating method. Gear hobbing belongs to the generating method. It is processed by the hobbing machine with a hob on the blank. Its processing accuracy is 6-8, which is suitable for processing external meshing cylindrical gears, etc.

[0003] A hob adopts a split structure, including a cutter body, wherein the cutter body is provided with a plurality of groups of blades, and both ends of the cutter body are provided with fixing rings, and the fixing rings fix the blades to the cutter body through wedge blocks. The outer periphery of the cutter body is provided with a plurality of groups of blade grooves along the length direction. The blade grooves are processed by milling, and the processing efficiency is low. In order to improve the processing efficiency, wire cutting is preliminarily used to process the blade grooves. Wire cutting is to process parts through the discharge principle of electric sparks. The workpiece is connected to the positive electrode of a pulse power supply, and molybdenum wire or copper wire is used as a cutting wire. The wire is connected to the negative electrode of a high-frequency pulse power supply as a tool electrode, and the processed parts are cut by spark discharge. Therefore, in order to cut a plurality of groups of blade grooves on the cutter body through wire cutting in one clamping of the cutter body, a clamp is required to avoid cutting wires such as molybdenum wire or copper wire, and at the same time have a good connection and support effect. Utility Model Content

[0004] The utility model aims to solve the above technical problems and provides a hob wire cutting chip groove fixture, which can cut several groups of blade grooves on the cutter body at one time through wire cutting after the cutter body is clamped by means of offset strip wing plates.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a hob wire cutting chip groove fixture, comprising a support body, the support body comprising a base, a core hole is provided on the base, two strip-shaped wing plates are provided on the outer periphery of the base, and a connecting block is provided at the end of each wing plate;

[0006] A stepped mandrel, one end of which has a positioning core, and the center of which has a connecting screw hole;

[0007] It also includes a screw, which includes a threaded connection part, a nut is provided on the threaded connection part, and a gasket is sleeved on the threaded connection part.

[0008] A further preferred technical solution is that the core shaft has a first cylinder, one end of the first cylinder has a second cylinder, the first cylinder is coaxial with the second cylinder, the diameter of the second cylinder is larger than the first cylinder, and the positioning core is arranged on an end of the second cylinder away from the first cylinder.

[0009] A further preferred technical solution is that the base is cylindrical, and the wing plate is parallel to the diameter of the base and offset on the outer circumferential surface of the base.

[0010] In order to facilitate the quick connection between the clamp and the wire cutting machine, a further preferred technical solution is that a locking device is provided on the connecting block.

[0011] A further preferred technical solution is that the locking device includes a bolt, a nut, a cam, and a pin; a "U"-shaped joint is provided on the upper part of the bolt, the cam is fixed to both sides of the "U"-shaped joint through a pin, and a cotter pin is provided at one end of the pin.

[0012] Compared with the prior art, the utility model has the following beneficial effects: through the offset strip wing plate, the blade groove to be cut can avoid the cutting metal wire such as molybdenum wire or copper wire, so that after the cutter body is clamped, several groups of blade grooves can be cut on the cutter body at one time through wire cutting, and at the same time, it can have a good connection and support effect;

[0013] The clamp is conveniently connected to the wire cutting machine quickly through the fast disassembly and assembly locking device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the front view of the utility model;

[0015] Figure 2 It is a side view of the utility model;

[0016] Figure 3 This is the front view of the hob of the utility model;

[0017] Figure 4 This is the front view of the support body of the utility model;

[0018] Figure 5 This is the main view of the mandrel of the utility model;

[0019] In the figure: 10. hob; 11. cutter body; 20. locking device; 21. cam; 22. bolt; 23. nut; 24. pin; 30. support body; 31. base; 32. wing plate; 33. connecting block; 34. core hole; 40. core shaft; 41. first cylinder; 42. second cylinder; 43. positioning core; 44. connecting screw hole. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Example

[0022] like Figure 3 As shown, a hob 10 adopts a split structure, including a cutter body 11, on which a plurality of blades are arranged, and fixing rings are arranged at both ends of the cutter body 11, and the fixing rings fix the blades on the cutter body 11 through wedges, and the outer periphery of the cutter body 11 is provided with a plurality of blade grooves along the length direction, and the blade grooves are processed by milling, and the processing efficiency is low. In order to improve the processing efficiency, wire cutting is preliminarily used to process the blade grooves. Wire cutting is to process parts by the discharge principle of electric sparks, connect the workpiece to the positive electrode of a pulse power supply, use molybdenum wire or copper wire as a cutting wire, connect the wire to the negative electrode of a high-frequency pulse power supply as a tool electrode, and use spark discharge to cut the processed parts. Therefore, in order to cut a plurality of blade grooves on the cutter body 11 by wire cutting in one clamping of the cutter body 11, a fixture is required to avoid cutting wires such as molybdenum wire or copper wire, and at the same time have a good connection and support effect;

[0023] The present application provides a clamp, such as Figure 4 As shown, the clamp includes a support body 30, and the support body 30 includes a cylindrical base 31, and a core hole 34 is provided on the base 31. Two strip-shaped wing plates 32 parallel to the diameter and offset are provided on the outer periphery of the base 31, and a connecting block 33 is provided at the end of each wing plate 32;

[0024] like Figure 5 As shown, a core shaft 40 with interference fit is arranged in the core hole 34 of the support body 30, and the core shaft 40 is stepped, and the core shaft 40 has a first cylinder 41, and a second cylinder 42 is arranged at one end of the first cylinder 41, and the first cylinder 41 is coaxial with the second cylinder 42, and the diameter of the second cylinder 42 is larger than the first cylinder 41, and a positioning core part 43 is arranged at one end of the second cylinder 42 away from the first cylinder 41, and the positioning core part 43 is coaxial with the first cylinder 41 and the second cylinder 42, and the diameter of the positioning core part 43 is larger than the diameter of the first cylinder 41, and the center of the positioning core part 43 has a connecting screw hole 44;

[0025] It also includes a screw, the screw is threadedly connected to the mandrel 40 through the connecting screw hole of the positioning core 43, the screw includes a threaded connection part, a nut is provided on the threaded connection part, and a gasket is set on the threaded connection part of the screw;

[0026] like Figure 1-2 As shown, when in use, the cutter body 11 of the hob is installed on the positioning core 43, and one end of the cutter body 11 is placed against the end face of the second cylinder 42, and then the screw is installed on the core shaft 40, and then the rotating screw is inserted through a tool. When the screw is locked, the gasket presses against the cutter body 11 of the hob. When it is fully locked, the cutter body 11 of the hob is fully positioned, which can ensure the tolerance requirements of the shape and position of the cutter groove in the cutter body 11 of the hob. At the same time, the cutter body 11 of the hob has high installation accuracy and correct positioning, which greatly improves the processing accuracy and ensures product quality. In addition, the fixture has a simple structure, convenient operation and reliable positioning.

[0027] In order to facilitate the quick connection between the fixture and the wire cutting machine, such as Figure 2 As shown, each of the connecting blocks 33 is provided with a locking device 20 that can be quickly disassembled and assembled, and the locking device 20 includes a bolt 22, a nut 23, a cam 21, and a pin 24. A "U"-shaped joint is provided on the upper part of the bolt 22, and the cam 23 is fixed to both sides of the "U"-shaped joint through a pin 4. A cotter pin is provided at one end of the pin 24.

[0028] The application method of the wire cutting machine base and the clamp is: place the clamp on the wire cutting machine base, place the upper washer above the fixing hole of the support body 30, pass the bolt 22 through the upper washer, the support body 30, and the wire cutting machine base, place another lower washer under the wire cutting machine base, tighten the nut 23 by hand, and then lock it with the cam handle.

[0029] The disassembly method is: when disassembling, lift up the cam 21, unscrew the nut 23, remove the lower washer below, and pull out the bolt 22; if the nut 23 is rusted and cannot be disassembled, you can remove the cotter pin and the upper washer, then pull out the pin shaft 24, and finally remove the bolt 22. In a preferred embodiment, an open groove is provided on the base of the wire cutting machine. It is quicker and more convenient to lift up the cam 21 and take out the clamp directly from the opening direction of the open groove.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hob wire cutting chip groove fixture, characterized in that: It comprises a support body, the support body comprises a base, a core hole is provided on the base, two strip-shaped wing plates are provided on the outer periphery of the base, and a connecting block is provided at the end of each wing plate; A stepped mandrel, one end of which has a positioning core, and the center of which has a connecting screw hole; It also includes a screw, which includes a threaded connection part, a nut is provided on the threaded connection part, and a gasket is sleeved on the threaded connection part.

2. A hob wire cutting chip groove fixture according to claim 1, characterized in that: The core shaft has a first cylinder, one end of the first cylinder has a second cylinder, the first cylinder is coaxial with the second cylinder, the diameter of the second cylinder is larger than the first cylinder, and the positioning core is arranged on one end of the second cylinder away from the first cylinder.

3. A hob wire cutting chip groove fixture according to claim 1, characterized in that: The base is cylindrical, and the wing plate is parallel to the diameter of the base and offset on the outer peripheral surface of the base.

4. A hob wire cutting chip groove fixture according to claim 1, characterized in that: The connecting block is provided with a locking device.

5. A hob wire cutting chip groove fixture according to claim 4, characterized in that: The locking device includes a bolt, a nut, a cam, and a pin; a "U"-shaped joint is provided on the upper part of the bolt, the cam is fixed to both sides of the "U"-shaped joint through a pin, and a cotter pin is provided at one end of the pin.

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