Gear shaper cutter key cutting clamp

Abstract

The utility model discloses a slotting cutter key cutting clamp which comprises a step-shaped mandrel, a positioning core portion is arranged at one end of the mandrel, a through groove is formed in the step face, close to the positioning core portion, of the mandrel, two first screw holes are further formed in the side, away from the positioning core portion, of the through groove, and two second screw holes are further formed in the side, away from the positioning core portion, of the through groove. The connecting line of the centers of the two first screw holes is parallel to the through groove, and the two first screw holes are symmetrically arranged. Second screw holes are further formed in the parts, on the two sides of the positioning core part, of the stepped face of the mandrel, and one second screw hole is located in the side, away from the through groove, of the first screw hole. A positioning block is arranged at the position, corresponding to the first screw holes, of the mandrel, and a pair of through holes are formed in the positioning block and correspond to the first screw holes one to one; a pressing plate is further arranged at the position, corresponding to each second screw hole, of the mandrel, and through holes are formed in the pressing plates and correspond to the second screw holes in a one-to-one mode; and the slotting cutter is completely positioned, so that the tolerance requirements of the shape and the position of the key slot can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of gear manufacturing, in particular to a gear shaping knife key cutting 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 forming method and generating method. Gear shaping belongs to the generating method. It is processed by the gear shaping machine with the gear shaping cutter on the blank. Its processing accuracy is 7-9 level, Ra6.3-Ra3.2, which is suitable for processing internal and external meshing cylindrical gears, duplex gears, triple gears, racks and bevel gears, etc.

[0003] Existing gear shaping cutters all include a gear disc and teeth with consistent chordal tooth thickness distributed on the circumference of the gear disc. There is an end face keyway on the gear disc, which is connected to the gear shaping cutter rod. The gear shaping cutter is driven to rotate through the keyway. Some gear shaping cutters have symmetry requirements for the center of the cutter teeth and the center of the keyway to ensure that when the cutter is changed, the relative position of the gear shaping cutter teeth and the workpiece in the circumferential direction remains unchanged to achieve efficient processing requirements. There are generally two processing methods for the keyway on the gear shaping cutter. One is to make the keyway first, and then use the keyway to position the gear shaping cutter teeth; the other is to cut the keyway out through wire cutting after the gear shaping cutter teeth are processed. During wire cutting, the gear shaping cutter needs to be positioned to process the keyway. After actual use, method one cannot guarantee the overlap requirement between the cutter teeth and the keyway center due to the short keyway positioning surface. Method two uses the cutter teeth to position the keyway, and the positioning surface spacing is long, which can meet the overlap requirement between the cutter teeth and the keyway center. Utility Model Content

[0004] The utility model aims to solve the above technical problems and provides a gear shaping cutter key cutting fixture, through which the gear shaping cutter is positioned so as to process the end face keyway.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a slotting key cutting fixture, comprising a stepped mandrel, one end of the mandrel having a positioning core, a through groove is provided on the mandrel step surface close to the positioning core, and two first screw holes are further provided on the side of the through groove away from the positioning core, the center line of the two first screw holes is arranged parallel to the through groove and the two first screw holes are arranged symmetrically;

[0006] Second screw holes are also provided on the mandrel step surfaces on both sides of the positioning core, wherein one of the second screw holes is located on a side of the first screw hole away from the through groove;

[0007] A positioning block is provided at the core shaft position corresponding to the first screw hole, and a pair of through holes are provided on the positioning block, which are arranged in one-to-one correspondence with the pair of first screw holes;

[0008] A pressing plate is also provided at the core shaft position corresponding to each second screw hole, and a through hole is provided on the pressing plate in one-to-one correspondence with the second screw hole.

[0009] A further preferred technical solution is that the core shaft has a first cylinder, a second cylinder is provided at one end of the first cylinder, the first cylinder is coaxial with the second cylinder, the diameter of the second cylinder is larger than the first cylinder, a back-off groove is provided at a position of the first cylinder close to the second cylinder, and the positioning core is arranged on an end of the second cylinder away from the first cylinder.

[0010] A further preferred technical solution is that the positioning block comprises a plate body, and a pair of L-shaped positioning parts are symmetrically provided on a long side of the plate body.

[0011] A further preferred technical solution is that the pressing plate is an L-shaped pressing plate.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the gear shaping cutter is centered by the positioning core, and then the rotation of the gear shaping cutter can be limited by inserting the positioning block into the tooth groove of the gear shaping cutter, and at the same time, the keyway is processed by positioning the cutter teeth, and the spacing between the positioning surfaces is long, which can meet the requirements of the coincidence degree between the cutter teeth and the keyway center, and then the axial movement of the gear shaping cutter is limited by the pressure plate, so that the gear shaping cutter is completely positioned, so that the tolerance requirements of the shape and position of the keyway can be guaranteed, the gear shaping cutter has high installation accuracy and correct positioning, which greatly improves the processing accuracy and ensures product quality, and the fixture has a simple structure, convenient operation and reliable positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is the front view of the utility model;

[0014] Figure 2 It is the left view of the utility model;

[0015] Figure 3 This is the main view of the mandrel of the utility model;

[0016] Figure 4 This is a left view of the mandrel of the utility model;

[0017] Figure 5 This is the front view of the positioning block of the utility model;

[0018] Figure 6 This is a left view of the positioning block of the utility model;

[0019] In the figure: 10. mandrel; 11. first cylinder; 12. second cylinder; 13. positioning core; 14. through groove; 15. second screw hole; 16. first screw hole; 20. pressure plate; 30. gear inserting cutter; 40. positioning block; 41. plate body; 42. positioning part. 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 3-4 As shown, a gear-slotting key cutting fixture includes a mandrel 10, the mandrel 10 is stepped, the mandrel 10 has a first cylinder 11, one end of the first cylinder 11 has a second cylinder 12, the first cylinder 11 is coaxial with the second cylinder 12, the diameter of the second cylinder 12 is larger than the second cylinder 11, the first cylinder 11 is provided with a backing groove at a position close to the second cylinder 12, and the second cylinder 12 is provided with a positioning core 13 at one end away from the first cylinder 11, the positioning core 13 is a cylinder, and the positioning core 13 is coaxial with the first cylinder 11 and the second cylinder 12. The diameter of the positioning core 13 is smaller than the diameter of the first cylinder 11, and the end of the positioning core 13 close to the second cylinder 12 is also provided with a backing groove, and the end surface roughness of the end of the second cylinder 12 close to the positioning core 13 is not greater than 0.8um, the end surface runout is not greater than 0.012mm, and the flatness is not greater than 0.008mm; a through groove 14 is also provided on the end surface of the second cylinder 12 on one side of the positioning core 13, and two first screw holes 16 are also provided on the side of the through groove 14 away from the positioning core 13, and the center line of the two first screw holes 16 is arranged parallel to the through groove 14 and the two first screw holes 16 are symmetrically arranged;

[0023] Second screw holes 15 are further provided on the end faces of the second cylinder 12 on both sides of the positioning core 13, wherein one of the second screw holes 15 is located on a side of the first screw hole 16 away from the through slot 4;

[0024] like Figure 5-6As shown, a positioning block 40 is provided at the position of the mandrel 10 corresponding to the first screw hole 16, and the positioning block 40 includes a plate body 41, and a pair of L-shaped positioning portions 42 are symmetrically provided on one long side of the plate body 41, and the positioning portions 42 are arranged along the thickness direction of the plate body 41. A pair of through holes are provided on the positioning block 40 and are arranged one-to-one with the pair of first screw holes 16. When in use, the positioning block 40 is installed on the end surface of the second cylinder 12 by screws, and the L-shaped positioning portion 42 of the positioning block 40 is buckled in the through groove 14;

[0025] A pressing plate 20 is also provided at the position of the mandrel 10 corresponding to each second screw hole 15. The pressing plate 20 is an L-shaped pressing plate. A through hole is provided on the pressing plate 20 and is arranged one-to-one with the second screw hole 15. When in use, the pressing plate 20 is installed on the end surface of the second cylinder 12 by screws, and one end of the pressing plate 20 is pressed against the end surface of the second cylinder 12.

[0026] like Figure 1-2 As shown, when in use, the gear-slotting cutter 30 to be cut is installed on the positioning core 13, and one end of the gear-slotting cutter 30 is pressed against the end face of the second cylinder 12, and then the positioning block 40 is installed on the mandrel 10, and the L-shaped positioning portion 42 of the positioning block 40 is buckled in the through groove 14, and at the same time, the outer end face of the positioning portion 42 is pressed against the tooth groove of the gear-slotting cutter 30, and the positioning block 40 makes the gear-slotting cutter 30 unable to rotate on the positioning core 13 and can only move axially, and at the same time, the key groove is processed by the cutter teeth positioning, and the positioning surface spacing is long, which can achieve the cutter teeth. The coincidence degree with the center of the keyway is required. At this time, two pressure plates 20 are installed on the end face of the second cylinder 12. One end of the pressure plate 20 is pressed against the end face of the second cylinder 12; the other end is pressed against the end face of the gear shaping cutter 30. Since the two pressure plates 20 are offset, a key cutting position can be reserved; the gear shaping cutter is completely positioned, so that the tolerance requirements of the shape and position of the keyway can be guaranteed. The gear shaping cutter 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] 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 gear shaping tool key cutting fixture, characterized in that: It comprises a stepped mandrel, one end of which has a positioning core, a through slot is provided on the mandrel step surface close to the positioning core, and two first screw holes are provided on the side of the through slot away from the positioning core, the center line of the two first screw holes is arranged parallel to the through slot and the two first screw holes are arranged symmetrically; Second screw holes are also provided on the mandrel step surfaces on both sides of the positioning core, wherein one of the second screw holes is located on a side of the first screw hole away from the through slot; A positioning block is provided at the core shaft position corresponding to the first screw hole, and a pair of through holes are provided on the positioning block and are arranged in one-to-one correspondence with the pair of first screw holes; A pressing plate is also provided at the core shaft position corresponding to each second screw hole, and a through hole is provided on the pressing plate in one-to-one correspondence with the second screw hole.

2. A gear shaping tool key cutting fixture according to claim 1, characterized in that: The core shaft has a first cylinder, and a second cylinder is provided at one end of the first cylinder. The first cylinder is coaxial with the second cylinder, and the diameter of the second cylinder is larger than that of the first cylinder. A back-off groove is provided at a position of the first cylinder close to the second cylinder, and the positioning core is arranged on an end of the second cylinder away from the first cylinder.

3. A gear shaping tool key cutting fixture according to claim 1, characterized in that: The positioning block comprises a plate body, and a pair of L-shaped positioning parts are symmetrically arranged on a long side of the plate body.

4. A gear shaping tool key cutting fixture according to claim 1, characterized in that: The pressing plate is an L-shaped pressing plate.

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