CN111730013A - A spline rubbing cutter with chamfering - Google Patents

Abstract

The present application relates to a spline rubbing cutter with chamfering. On the conventional cutter body structure, a chamfered spline tooth cutter body is added. The two cutter bodies are processed in combination with bolts and screws. The workpiece has chamfered teeth at the outlet end, which is convenient for processing and assembling the internal and external splines, reducing the loss of accessories and prolonging the service life of the workpiece.

Description

A spline rubbing cutter with chamfering

Technical field:

This patent relates to a spline gear rolling device for a steering shaft or a drive shaft or a real shaft or a transmission shaft, and in particular to a spline gear rolling cutter with chamfering.

Background technique:

With the rapid development of the automobile industry and the continuous deepening of technological innovation, the auto parts industry has ushered in new opportunities and challenges. Auto parts such as steering shafts or drive shafts or real shafts or transmission shafts are all connected with external splines. In the prior art, traditional external spline flat tooth rolling cutters are used to form the formed external spline shaft. To the interface into a straight structure, there are certain restrictions in the assembly of the formed external spline workpiece, because the internal and external splines belong to the structural design of tight assembly, which increases the difficulty of assembly and reduces the assembly efficiency. At the same time, it also increases the damage probability of collision between the meshing teeth of the inner and outer spline teeth. In view of this, the present application is proposed, which can well improve the above problems, can greatly improve the smoothness and passability of assembly, and can also reduce the probability of damage during assembly and use!

Invention content:

The technical problem to be solved by the present application is to provide a spline gear cutter with chamfering.

In order to solve the above technical problems, a spline gear cutter with chamfering processing is applied, which is composed of a combination of two cutter bodies. The normal spline tooth cutter body is provided with normal spline teeth, and the chamfered spline tooth cutter body is provided. There are chamfered spline teeth on it; the two cutter bodies are sequentially provided with rough rolling teeth, fine rolling teeth, calibration teeth and retracting teeth along the length direction, and the top surface of the spline teeth on one side of the cutter body is in the shape of a Small-diameter arc chamfering; the tooth top surface of the bottom side of the chamfered spline tooth cone is chamfered with a small-diameter arc, which can be smoothly transitioned when matched with the chamfered side of the tooth top of the normal spline tooth cutter body. The two cutter bodies are fixed by positioning pins and bolts, and are assembled in the same direction.

Further, the distance between the tooth crest and the tooth root of the rough rolling tooth is smaller than the distance between the tooth crest and the tooth root of the calibration tooth.

Further, the height of the tooth tip of the retracting tooth increases gradually in the direction extending from the end of the exit portion away from the fine grinding tooth to the end of the retracting tooth close to the fine grinding tooth.

Further, the tooth roots of the teeth on the rough grinding teeth and the calibration teeth are at the same height.

Further, the distance between the tooth crest and the root of the teeth on the coarsely rubbed teeth increases gradually in the direction extending from the end of the coarsely rubbed away from the finely rubbed teeth to the end where the coarsely rubbed teeth and the finely rubbed teeth are connected.

Further, the tooth shapes of the rough rubbing teeth, fine rubbing teeth, calibration teeth and retracting teeth are designed by two-piece cutter body assembly structure, that is, on the longitudinal section of the teeth, the chamfered spline teeth and the normal teeth are designed. It adopts inclined ladder shape, and the middle is connected by special treatment.

Further, there is chamfering on each key of one ring of teeth of the external spline of the product after processing, and the chamfered external spline workpiece can be assembled with the internal spline, which can increase the smoothness and improve the assembly efficiency.

Further, it is safe and reliable without causing scratches, burrs and other quality defects on the surface of the product when processing the workpiece.

The present application is a spline rubbing cutter for processing splines with chamfers, which is mainly used for machining external splines such as machine shafts in the machining direction or drive shafts or solid shafts or transmission shafts. The teeth, the calibration teeth and the retracting teeth are several parts, the structure design is reasonable and streamlined, and the processed products are of high precision. When grinding the parts, the gear grinding cutter of the present application applies a certain pressure to the surface of the parts, so that the metal on the surface of the parts undergoes plastic deformation, thereby improving the roughness and hardness of the product, and finally forming a spline with chamfer. Unlike the currently used cutting method in which the metal fibers are broken, the metal fibers processed by the spline gear cutter with chamfering of the present application are continuous.

Description of drawings:

FIG. 1 is a schematic structural diagram of the present application.

FIG. 2 is an enlarged view of FIG. 1A .

FIG. 3 is a front view of the present application.

FIG. 4 is a left side view of the present application.

Fig. 5 is an enlarged view of Fig. 4C.

FIG. 6 is a diagram of a workpiece processed by the present application.

Marking description: 1-Chamfering spline teeth; 2-Normal spline teeth; 3-Bolt; 4-Locating pin; 11-Chamfering spline teeth; 21-Normal spline teeth; L1-Rough rolling tooth; L2-fine grinding knife; L3-calibration tooth; L4-retraction tooth.

Detailed ways:

As shown in FIGS. 1 to 5 , the spline grinding cutter with chamfering in the present application includes a chamfering spline tooth cutter body 1 , and the chamfering spline tooth cutter body 1 is provided with chamfering spline teeth 11 , and a normal spline tooth The cutter body 2 is provided with normal spline teeth 21, the chamfered spline tooth cutter body 1 and the normal spline tooth cutter body 2 are fixedly connected by the bolt 3 and the bolt 4, and the chamfered spline tooth 11 and the normal spline tooth 21 pass through. The small diameter chamfer has a smooth transition; this structure enables the spline tooth shape to be chamfered at the entry end of each key after one circle is processed, so as to facilitate the timeliness of assembly.

The chamfering process of this application adopts a special design. According to the chamfering size required by the drawing, on the premise of ensuring the accuracy of the product, a high-precision grinding process and a strict assembly process are used to ensure the stability of the tool manufacturing. to make the processed products meet the drawing requirements.

The chamfered spline tooth cutter body 1 and the normal spline tooth cutter body 2 of the present application are respectively provided with a rough rolling tooth L1, a fine rolling tooth L2, a calibration tooth L3 and a retracting tooth L4 along the The cutter bodies are arranged in sequence in the length direction. As shown in Figure 3, the distance between the tooth top and the tooth root on the rough rolling tooth L1 is smaller than the distance between the tooth top and the tooth root on the fine rolling tooth L2.

The height of the tooth tip on the said retracting tooth L4 increases gradually from the end of the retracting tooth L4 away from the fine grinding tooth L2 to the end of the retracting tooth L4 close to the fine grinding tooth L2; the rough grinding tooth L1 and the fine rolling tooth The tooth roots on L2 are all at the same height, and the distance between the tooth top and the tooth root on the rough rolling tooth L1 is from the end of the rough rolling tooth L1 away from the fine rolling tooth L2 to the point where the rough rolling tooth L1 and the fine rolling tooth L2 meet. Gradually increase in the direction in which one end extends.

As shown in Figure 6, it is a picture of the workpiece formed by the application of the chamfered spline tooth rolling cutter. The advantage of the chamfered spline is that when it is assembled with the internal spline, the chamfer acts as a guide, so that the internal and external splines have a guiding effect. The assembly efficiency is higher, the tooth meshing degree is more accurate, and the tooth rolling and chamfering are formed at one time, which saves the cost.

Claims (8)

1. a spline rubbing cutter with chamfering, is composed of the combination of two cutter bodies, and it is characterized in that: the normal spline tooth cutter body is provided with normal spline teeth, and the chamfered spline tooth cutter body is provided with normal spline teeth. Chamfered spline teeth are provided; the two cutter bodies are sequentially provided with coarse rolling teeth, fine rolling teeth, calibration teeth and retracting teeth along the length direction, and the top surface of the spline teeth on one side of the cutter body is a small diameter Arc chamfering; the tooth top surface on the bottom side of the chamfered spline tooth cone is a small-diameter arc chamfering, which can be smoothly transitioned when it is matched with the chamfered side of the tooth top of the normal spline tooth cutter body. Each cutter body is fixed by positioning pins and bolts, and is assembled in the same direction. 2 . The spline tooth rolling cutter with chamfering according to claim 1 , wherein the distance between the tooth top and the tooth root of the rough rolling tooth is smaller than the distance between the tooth top and the tooth root of the calibration tooth. 3 . 3. The spline rubbing cutter with chamfering according to claim 1, characterized in that: the height of the tooth tip of the retracting tooth is close to the fine rubbing to the retracting tooth from the end away from the fine rubbing tooth from the exit part. The direction in which one end of the tooth extends is gradually increased. 4 . The spline tooth rolling cutter with chamfering according to claim 1 , wherein the tooth roots of the teeth on the rough rolling teeth and the calibration teeth are at the same height. 5 . 5. The spline tooth rubbing cutter with chamfering according to claim 1, characterized in that: the distance between the tooth crest and the tooth root of the upper teeth of the rough rubbing is away from the rough rubbing and the fine rubbing. One end of the teeth gradually increases in the direction extending from the end where the coarsely rubbed teeth and the finely rubbed teeth are connected. 6. The spline tooth rolling cutter with chamfering according to any one of claims 1 to 5, characterized in that: the tooth shapes of the rough rolling teeth, fine rolling teeth, calibration teeth and retracting teeth The two-piece cutter body assembly structure design is adopted, that is, on the longitudinal section of the teeth, the chamfered spline teeth and the normal teeth are in the shape of an inclined ladder, and the middle is connected by special processing. 7. The spline tooth rolling cutter with chamfering according to one of claims 1 to 5, characterized in that: there is chamfering on each key of a circle of teeth on the outer spline of the product after processing, and the chamfering When the spline workpiece can be assembled with the internal spline, it can increase the smoothness and improve the assembly efficiency. 8. The spline rubbing cutter with chamfering according to one of claims 1 to 5, characterized in that it is safe and reliable without causing quality defects such as scratches and burrs on the surface of the product when machining the workpiece.

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