Clamping tool for machining outer teeth of workpiece

Abstract

The utility model discloses a clamping tool for machining outer teeth of a workpiece. The clamping tool solves the problem of clamping and positioning in the machining process of the outer teeth of a product. Comprising a shaft type workpiece to be machined, one end of the workpiece is provided with a coaxial large end portion, the large end portion is provided with a mounting hole coaxially extending inwards from the end face of the large end portion, and the tool further comprises a mounting shaft and an expansion sleeve. A protruding conical table is coaxially arranged at one end of the mounting shaft, and the small end of the conical table faces the direction away from the mounting shaft. The expansion sleeve comprises a body part, a plug hole is coaxially formed in the body part, a convex boss is arranged on the outer side of one end of the body part, and when the inner side of the plug hole in the end, away from the boss direction, of the body part is subjected to outward pushing tension, the end, away from the boss direction, of the body part can expand outwards; the boss of the expansion sleeve is close to the mounting shaft so that the conical table can be embedded into the plug hole, the end, away from the boss direction, of the body part is embedded into the mounting hole, and the end face of the large end abuts against the boss.

Description

Technical Field

[0001] The utility model relates to the technical field of gear processing, in particular to a clamping tooling for external tooth machining of workpieces. Background Technique

[0002] Gear processing is a very important modern manufacturing technology, mainly used for the transmission parts in various mechanical equipment. Gear processing usually includes processes such as milling, turning, cutting, grinding, and gear forming.

[0003] Our company is involved in a workpiece product, which belongs to a shaft-type workpiece. One end of the workpiece is provided with a coaxial large end portion, the outside of the large end portion is an external gear structure, and the large end portion is provided with a mounting hole extending coaxially inward from the end face of the large end portion. Due to the relatively special structure of this workpiece, the external teeth of this workpiece are generally machined by a machining center. However, the demand for this workpiece is large, and the cost of machining by a machining center is high, which will increase the production cost and lead to a decrease in revenue. Therefore, our company seeks to use a special machine tool for shaving to perform shaving machining, and for this purpose, a special machining tooling that can be applied to this machining environment is designed specifically to solve the problem of product clamping and positioning during the external tooth machining process. Content of the Utility Model

[0004] The purpose of the utility model is to provide a clamping tooling for external tooth machining of workpieces, which solves the problem of clamping and positioning during the external tooth machining of products.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] The clamping tooling for external tooth machining of workpieces includes a shaft-type workpiece to be machined. One end of the workpiece is provided with a coaxial large end portion, and the large end portion is provided with a mounting hole extending coaxially inward from the end face of the large end portion. It also includes a mounting shaft and a expansion sleeve; a convex conical platform is coaxially arranged at the end of one end of the mounting shaft, and the small end of the conical platform faces away from the mounting shaft; the expansion sleeve includes a body part, a plug hole is coaxially arranged inside the body part, an outwardly convex boss is arranged on the outside of one end of the body part, and when the inner side of the plug hole at the end of the body part away from the boss is subjected to an outward pushing tension, the end of the body part away from the boss can expand outward; when the boss of the expansion sleeve is close to the mounting shaft and the conical platform is embedded in the plug hole, the end of the body part away from the boss is embedded in the mounting hole, and the end face of the large end portion is pressed against the boss.

[0007] Based on the above scheme and as the preferred scheme of the above scheme: a relief step is circumferentially arranged on the outside of the side of the boss away from the mounting shaft.

[0008] On the basis of the above solution and as a preferred solution to the above solution: The plug hole is a tapered hole adapted to the taper of the tapered table.

[0009] On the basis of the above solution and as a preferred solution to the above solution: The length of the body part is less than the depth of the mounting hole.

[0010] On the basis of the above solution and as a preferred solution to the above solution: A plurality of first cutting grooves are evenly arranged around the body part, and the first cutting grooves extend from one end of the body part away from the boss to the boss.

[0011] On the basis of the above solution and as a preferred solution to the above solution: A plurality of second cutting grooves are evenly arranged around the body part, and the second cutting grooves extend from one end in the direction of the boss towards the other end.

[0012] In order to solve the clamping and positioning problems in the processing of the external teeth of the product, the utility model has the following beneficial effects:

[0013] The clamping tooling for machining the external teeth of the workpiece of the utility model realizes the combination of the workpiece to be machined, the expansion sleeve and the clamping tooling by embedding the tapered table of the expansion sleeve into the plug hole by approaching the boss of the expansion sleeve to the mounting shaft, embedding one end of the body part away from the boss direction into the mounting hole, and pressing the end face of the large end part against the boss.

[0014] During processing application, one end of the mounting shaft away from the tapered table is installed on the mounting spindle of the shaving processing equipment, and the center drill of the shaving processing equipment presses against one end of the workpiece to be machined away from the large end part. Through the pressing of the center drill, the end face of the large end part presses against the boss and pushes the expansion sleeve to form a tendency to slide towards the mounting shaft direction. By applying an outward pressure to the end of the plug hole of the body part of the expansion sleeve away from the boss direction through the tapered table, the fixed connection between the mounting shaft and the workpiece to be machined is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is an overall schematic diagram of the clamping tooling for machining the external teeth of the workpiece of the utility model;

[0016] Figure 2 is a schematic structural diagram of the expansion sleeve of the utility model. DETAILED DESCRIPTION OF THE INVENTION

[0017] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0018] Refer to Figure 1-2, the present utility model discloses a clamping tooling for machining external teeth of a workpiece. The clamping tooling for machining external teeth of the workpiece includes a shaft-shaped workpiece 100 to be machined. One end of the workpiece 100 is provided with a coaxial large end portion 101. The large end portion 101 is provided with a mounting hole 102 extending coaxially inward from the end face of the large end portion 101. It further includes a mounting shaft 200 and a expansion sleeve 300. One end of the mounting shaft 200 is coaxially provided with a protruding tapered table 201, and the small end of the tapered table 201 faces away from the mounting shaft 200. The expansion sleeve 300 includes a body portion 301. A plug hole 302 is coaxially arranged inside the body portion 301. An outwardly protruding boss 303 is arranged on the outer side of one end of the body portion 301. When the inner side of the plug hole 302 at one end of the body portion 301 away from the boss 303 is subjected to an outward pushing tension, the end of the body portion 301 away from the boss 303 can expand outward. When the boss 303 of the expansion sleeve 300 is close to the mounting shaft 200, the tapered table 201 is inserted into the plug hole 302, the end of the body portion 301 away from the boss 303 is inserted into the mounting hole 102, and the end face of the large end portion 101 abuts against the boss 303 (the length of the body portion 301 is less than the depth of the mounting hole 102).

[0019] In the clamping tooling for machining external teeth of the present utility model, by making the boss 303 of the expansion sleeve 300 close to the mounting shaft 200 so that the tapered table 201 is inserted into the plug hole 302, the end of the body portion 301 away from the boss 303 is inserted into the mounting hole 102, and the end face of the large end portion 101 abuts against the boss 303, the combination of the workpiece 100 to be machined, the expansion sleeve 300, and the clamping tooling is realized.

[0020] During the machining application, one end of the mounting shaft 200 away from the tapered table 201 is mounted on the mounting spindle of the gear shaving processing equipment. The center drill of the gear shaving processing equipment abuts against one end of the workpiece 100 away from the large end portion 101. Through the abutment of the center drill, the end face of the large end portion 101 abuts against the boss 303 and pushes the expansion sleeve 300 to form a tendency to slide in the direction of the mounting shaft 200. By applying an outward pressure to the end of the plug hole 302 of the body portion 301 of the expansion sleeve 300 away from the boss 303 through the tapered table 201, the fixed connection between the mounting shaft 200 and the workpiece 100 to be machined is realized.

[0021] Among them, the characteristic of the structure of the tapered table 201 is that after machining is completed, the mounting shaft 200 and the expansion sleeve 300 can be smoothly separated from each other. Generally, at this time, although the mounting shaft 200 and the expansion sleeve 300 have been separated from each other, the expansion sleeve 300 still remains in the mounting hole 102 of the workpiece 100 (the just machined product). Therefore, an avoidance step 304 is arranged around the outer side of the side of the boss 303 away from the mounting shaft 200, as Figure 1As shown, a gap will be formed between the avoidance step 304 and the end face of the large end portion 101 of the workpiece 100, and this gap can facilitate the insertion of a tool into the gap to pull out the expansion sleeve 300 from the mounting hole 102.

[0022] Furthermore, the plug hole 302 is a tapered hole adapted to the taper of the tapered table 201, that is, one end of the tapered table 201 away from the mounting shaft 200 is smaller than the end closer to the mounting shaft 200, but the inner diameter of the plug hole 302 at the end closer to the boss 303 is larger than the inner diameter at the end away from the boss 303. After the tapered table 201 is inserted into the plug hole 302, it can better provide the force for expanding the expansion sleeve 300.

[0023] To better ensure the applicability of this work and improve the reliability of the application, as Figure 2 shown, a plurality of first cutting grooves 305 are evenly arranged around the body portion 301 in a circumferential manner, and the first cutting grooves 305 extend from one end of the body portion 301 away from the boss 303 to the boss 303. Furthermore, a plurality of second cutting grooves 306 are evenly arranged around the body portion 301 in a circumferential manner, and the second cutting grooves 306 extend from one end in the direction of the boss 303 towards the other end. Preferably, the first cutting grooves 305 and the second cutting grooves 306 are arranged in an alternating manner, and the first cutting grooves 305 and the second cutting grooves 306 provide effective conditions for the expansion sleeve 300 to expand under force. Furthermore, circular cutting holes 307 are provided at the bottom positions of the first cutting grooves 305 and the second cutting grooves 306, and these circular cutting holes 307 are beneficial to the force deformation and expansion of the body portion 301.

[0024] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent replacements or changes, should be covered within the protection scope of the present invention.

Claims

1. A clamping tool for machining external teeth of a workpiece, comprising an axial workpiece (100) to be machined, wherein one end of the workpiece (100) is provided with a coaxial large end portion (101), and the large end portion (101) is provided with a mounting hole (102) coaxially extending inwardly from an end surface of the large end portion (101), characterized in that: It also comprises an installation shaft (200) and an expansion sleeve (300); a protruding conical platform (201) is coaxially arranged at the end of one end of the installation shaft (200), and the small end of the conical platform (201) faces away from the installation shaft (200); the expansion sleeve (300) comprises a main body (301), a plug hole (302) is coaxially arranged inside the main body (301), and an outwardly protruding boss (303) is arranged on the outer side of one end of the main body (301); when the inner side of the plug hole (302) at the end of the main body (301) away from the boss (303) is subjected to a tension force pushing outward, the end of the main body (301) away from the boss (303) can expand outward; The boss (303) of the expansion sleeve (300) is close to the installation shaft (200) so that the conical platform (201) is embedded in the plug hole (302), and the end of the main body (301) away from the boss (303) is embedded in the installation hole (102), and the end surface of the large end (101) is pressed against the boss (303).

2. The clamping tool for machining external teeth of a workpiece according to claim 1, characterized in that: An avoidance step (304) is arranged around the outer side of the boss (303) away from the installation axis (200).

3. The clamping tool for machining external teeth of a workpiece according to claim 1, characterized in that: The plug hole (302) is a tapered hole having a taper adapted to the taper of the tapered platform (201).

4. The clamping tool for machining external teeth of a workpiece according to claim 1, characterized in that: A plurality of first grooves (305) are evenly distributed around the main body portion (301), and the first grooves (305) extend from one end of the main body portion (301) away from the boss (303) to the boss (303).

5. The clamping tool for machining external teeth of a workpiece according to claim 4, characterized in that: A plurality of second grooves (306) are evenly distributed around the main body portion (301), and the second grooves (306) extend from one end of the boss (303) toward the other end.

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