Fixture for cutting teeth with tooth-shaped steering positioning line
By designing tooth steering positioning line cutting tooth clamps, using structures such as wedge positioning platform and spherical insertion rod, the problem of difficult to cut and form the outer ring gear at one time is solved, and the gear is accurately positioned and high-quality processing is achieved.
Patent Information
- Application Number
- CN202421919072.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-08-09
AI Technical Summary
In gear machining, due to the high hardness of the outer ring gear or the outer spline, it is difficult to use conventional tools for "one-time cutting and forming, and the prior art is difficult to achieve accurate positioning of the tooth blank and control of the tooth surface joint marks, resulting in poor product quality.
A tooth-shaped steering positioning line cutting tooth clamp is designed, including a positioning platform, a centering shaft, a nut and a positioning mechanism. Through a wedge-shaped positioning platform, a spherical insertion rod and a tightening screw, the consistency of the gear's one-time cutting forming and positioning reference is achieved.
The gear is cut and formed in one-time, and the positioning reference is consistent, which reduces processing costs, improves product quality, and avoids damage to the machine tool bracket caused by multiple processing.
Smart Images
Figure CN222985871U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of gear processing, and particularly relates to a wire-cutting tooth fixture positioned by tooth profile turning. Background Art
[0002] In the machining of gears, for some outer-ring gears or external splines with special parameters, structures, and high hardness, it is difficult to use conventional tools for "cold" machining. For example, there is no suitable hobbing tool or shaping tool, or the tool cannot cut due to excessive hardness. Generally, electric pulse or wire cutting and other local high-temperature machining by discharge are adopted. The cost of the punch for electric pulse is relatively high, and wire cutting is mostly used. The main difficulty in machining the outer-ring gear is to achieve "one-time" cutting forming of gear machining. As shown in Figure 1 If one-time cutting forming is adopted, the bracket on the machine tool will be damaged. Therefore, two-time tooth cutting forming is adopted, and the operation of positioning and orienting the tooth blank is difficult, and the tooth surface will have an over-wide tool mark at the joint, resulting in scrapping of the product. Summary of the Invention
[0003] In order to solve the above technical problems, the utility model provides a wire-cutting tooth fixture positioned by tooth profile turning, which has a simple structure, low cost, can enable one-time cutting forming of gears, has a consistent positioning reference, and ensures the product quality.
[0004] The technical solution adopted by the utility model is: a wire-cutting tooth fixture positioned by tooth profile turning, which includes a positioning platform, a centering shaft, a nut, and a positioning mechanism; one end of the positioning platform is a wedge-shaped structure, a centering shaft is provided at this end of the positioning platform, a nut is provided at the end of the centering shaft, and the nut is used to press the gear; the positioning mechanism includes a guide sleeve, a plug rod, and a set screw; the guide sleeve is fixed on the positioning platform, and the axis of the guide sleeve intersects with the axis of the centering shaft; a plug rod is arranged in the guide sleeve, and the plug rod is in clearance fit with the guide sleeve. The end of the plug rod can be inserted into the tooth groove of the gear to perform circumferential positioning on the gear; the set screw is arranged on the guide sleeve and is used to position the plug rod.
[0005] Further, one end of the plug rod facing the centering shaft is a spherical surface.
[0006] Further, it further includes a bracket, and the positioning platform is installed on the bracket.
[0007] Further, a matching shaft sleeve is further arranged on the centering shaft. The matching shaft sleeve includes a pressing plate and a sleeve rod. The pressing plate and the sleeve rod are coaxial. The height of the sleeve rod is less than the thickness of the gear. After the gear is in clearance fit with the sleeve rod, it is placed on the centering shaft and pressed by the nut; the pressing plate is located between the nut and the gear.
[0008] Compared with the prior art, the beneficial effects of the utility model are:
[0009] The utility model has a simple structure and low cost. When in use, the inner hole of the gear blank is fitted onto the mating shaft sleeve and tightened by a nut. Then, wire cutting is performed on the gear blank. After cutting out a part of the teeth, the nut is loosened and the gear blank is rotated to orient it with the corresponding tooth grooves, and then all the other tooth profiles are cut. The operation is convenient, and the gear can be cut into shape at one time with a consistent positioning reference, ensuring the product quality. Description of the Drawings
[0010] Figure 1 It is a schematic diagram of the current gear blank clamped on the wire cutting machine tool bracket.
[0011] Figure 2 It is the front view of the utility model.
[0012] Figure 3 It is the top view of the utility model.
[0013] Figure 4 It is the three-dimensional view of the positioning platform of the utility model.
[0014] Figure 5 It is the three-dimensional view of the positioning mechanism of the utility model.
[0015] Figure 6 It is the three-dimensional view of the mating shaft sleeve of the utility model. Detailed Embodiment
[0016] The following further describes the utility model with reference to the drawings.
[0017] As Figure 2-6 shown, the utility model includes a bracket 1, a positioning platform 2, a mating shaft sleeve 4, a centering shaft 21, a nut 22, and a positioning mechanism 3. The positioning platform 2 is fixedly installed on the bracket 1. One end of the positioning platform 2 is a wedge-shaped structure, and a centering shaft 21 is provided at this end of the positioning platform. This can make most of the teeth of the gear exposed outside the positioning platform 2, facilitating the wire cutting processing of the teeth of the gear.
[0018] The centering shaft 2 is provided with a mating shaft sleeve 4 and a nut 22. The mating shaft sleeve 4 includes an annular pressing plate 41 and a tubular sleeve rod 42. The pressing plate 41 and the sleeve rod 42 are coaxial. The height of the sleeve rod 42 is less than the thickness of the gear 5. After the gear 5 is in clearance fit with the sleeve rod 42, it is placed on the centering shaft 2 and tightened by the nut 22. The pressing plate 41 is located between the nut 22 and the gear 5.
[0019] The positioning mechanism 3 described above includes a guide sleeve 31, a plug rod 32 and a set screw 33; the guide sleeve 31 is fixed on the positioning platform 2, and the axis of the guide sleeve 31 intersects with the axis of the centering shaft 2, that is, the axis of the guide sleeve 31 passes through the center of the gear 5. A plug rod 32 is arranged in the guide sleeve 31, and the plug rod 32 is in clearance fit with the guide sleeve 31. The plug rod 32 can slide in the guide sleeve 31, and the end of the plug rod 31 can be inserted into the tooth groove of the gear 5 to perform circumferential positioning on the gear. One end of the plug rod 32 facing the centering shaft 21 is spherical. The set screw 33 is arranged on the guide sleeve 31 and is used to position the plug rod 32. When the utility model is used, it is positioned with the center hole of the gear 5 as the reference. After cutting 3 / 4 of the number of teeth, the cutting line leaves the top diameter of the gear. After the gear is rotated 2 / 4 of a circle, the spherical surface at one end of the plug rod 32 facing the centering shaft 21 is pressed against the two side surfaces of the tooth groove for positioning and then pressed tightly, and then the remaining number of teeth of the external gear are cut.
Claims
1. A tooth-shaped turning positioning wire cutting tooth fixture, characterized by: It includes a positioning platform, a centering shaft, a nut and a positioning mechanism; one end of the positioning platform is a wedge-shaped structure, and a centering shaft is provided at this end of the positioning platform. A nut is provided at the end of the centering shaft, and the nut is used to clamp the gear; the positioning mechanism includes a guide sleeve, an insertion rod and a set screw; the guide sleeve is fixed on the positioning platform, and the axis of the guide sleeve intersects with the axis of the centering shaft; an insertion rod is provided in the guide sleeve, and the insertion rod and the guide sleeve are clearance-matched, and the end of the insertion rod can be inserted into the tooth groove of the gear to circumferentially position the gear; the set screw is arranged on the guide sleeve to position the insertion rod.
2. The tooth-shaped turning positioning wire cutting tooth fixture according to claim 1 is characterized by: The end of the insert rod facing the centering axis is a spherical surface.
3. The tooth-shaped turning positioning wire cutting tooth fixture according to claim 1 is characterized by: It also includes a bracket, and the positioning platform is installed on the bracket.
4. The tooth-shaped turning positioning wire cutting tooth fixture according to claim 1 is characterized by: The centering shaft is also provided with a matching sleeve, which includes a pressure plate and a sleeve rod. The pressure plate and the sleeve rod are coaxial. The height of the sleeve rod is less than the thickness of the gear. After the gear and the sleeve rod are matched with each other, they are placed on the centering shaft and tightened by a nut. The pressure plate is located between the nut and the gear.