CN215034207U - Combined hobbing cutter assembly - Google Patents

Abstract

A combined hobbing cutter assembly comprises a cutter shaft, wherein a first hobbing cutter and a second hobbing cutter are arranged on the cutter shaft; the first hob is used for hobbing; the second hob is used for chamfering/chamfering; and the cutting edges of the first hob and the second hob are opposite in direction. The utility model provides a combination formula gear hobbing cutter unit spare for among gear hobbing machine, through the improvement to gear hobbing cutter unit spare, with chamfer/chamfer processing and gear hobbing processing operation integration together, and the production of avoiding the burr that can be fine, chamfer, gear hobbing, burring operation can be accomplished in one-time processing, have improved machining efficiency and part quality, and simple structure, and are with low costs.

Description

Combined hobbing cutter assembly

Technical Field

The utility model belongs to gear hobbing machine equipment field, concretely relates to modular gear hobbing cutter subassembly.

Background

Gear shaft parts, gear parts and the like are widely used in the industrial field, and structurally, the gear shaft parts generally comprise a shaft body and a cylindrical gear arranged on the shaft body. A gear hobbing machine is required to be used in the production and machining process of the gear shafts, the gear hobbing machine fixes two ends of a shaft rod through a tool and rotates at a high speed, and a gear hobbing cutter and the gear shafts synchronously move according to the meshing relationship to be machined.

In the gear hobbing process, burrs are easily generated on the end face along the rotation direction of the hobbing cutter during gear hobbing, after the gear hobbing process is finished, the deburring operation is required, the process is complex, the manual participation degree is high, and the efficiency is low. In addition, the processing of chamfering and chamfering on parts also generates burrs, and an additional deburring operation is also needed, and in the current processing process, the chamfering/chamfering processing and the gear hobbing processing need to be separately carried out, so that the steps are multiple, the efficiency is low, the processing error is large, and particularly the accumulated error in different processing steps is large.

In a conventional deburring process, a blade or a grinding wheel is used, which does not meet the requirements of both deburring and protecting the surface of a workpiece, and also causes the quality of the product after deburring to be reduced.

In the prior art, an automatic deburring structure is also provided, but the deburring operation is also an independent process: in the process of hobbing of parts, a cutter is extended out of a machine tool to remove burrs. However, in this structure, the matching between the tapers of the tool and the end surface of the workpiece is poor, and the angle adjustment is required, so the device is complex and occupies a large space.

Accordingly, the present application provides further designs and improvements to a hobbing cutter assembly on a hobbing machine based on some of the problems still present above.

SUMMERY OF THE UTILITY MODEL

To not enough among the above prior art, the utility model provides a combination formula gear hobbing cutter unit spare for among gear hobbing machine, through the improvement to gear hobbing cutter unit spare, with chamfer/chamfer processing and gear hobbing processing operation integration together, and the production of avoiding the burr that can be fine, chamfer, gear hobbing, burring operation can be accomplished in one-step refining, have improved machining efficiency and part quality, and simple structure, and are with low costs.

In order to solve the above technical problem, the present invention solves the above technical problems.

A combined hobbing cutter assembly comprises a cutter shaft, wherein a first hobbing cutter and a second hobbing cutter are arranged on the cutter shaft; the first hob is used for hobbing; the second hob is used for chamfering/chamfering.

In traditional gear hobbing cutter subassembly, only be provided with one and be used for carrying on the hobbing cutter of gear hobbing operation, in this application, be provided with two hobbing cutters on the arbor, be used for implementing different operations respectively. During the specific cutter shaft rotating work process, the cutter shaft rotates at a low speed, the end part of the spline shaft to be machined is gradually close to the second hob to perform chamfering machining, and burrs are generated inwards in the process. After the chamfer processing finishes, integral key shaft and second hobbing cutter separation, the arbor rotates at a high speed, the integral key shaft is close to first hobbing cutter gradually and carries out gear hobbing processing, in this process, first hobbing cutter begins the feed and removes to the chamfer position gradually from the opposite side of chamfer, can outwards release the burr that processing chamfer in-process formed, play fine burring effect, simultaneously because the chamfer has been processed and finished, consequently, the gear hobbing processing can not produce the burr in tip position, the burr is few on final product, and chamfer processing and gear hobbing processing are one-step to be accomplished, and the machining efficiency and the machining precision are improved, and the manufacturing cost of enterprises is saved.

In a preferred embodiment, the cutting edges of the first and second rolling cutters are in opposite directions, so that the rotation direction of the cutter shaft does not need to be changed during machining.

In a preferred embodiment, the cutter shaft is further provided with a third hob, the third hob is used for chamfering/chamfering, and the cutting edges of the third hob and the second hob are opposite in direction. The hobbing cutter assembly in the structure is used for processing parts with chamfers/chamfers at two ends, when the hobbing cutter assembly is used for processing the two sides of the part processing position, chamfers or chamfers are processed by the second hob and the third hob respectively, hobbing is processed by the first hob, chamfering operation and hobbing operation at two ends are completed in one step, and burrs cannot be generated.

In a preferred embodiment, the lower portion of the cutter shaft is disposed on a positioning seat, and the positioning seat is movably disposed on a positioning plate and used for moving the cutter shaft and selecting a proper hob to perform a corresponding processing operation.

Compared with the prior art, the utility model discloses following beneficial effect has: the utility model provides a combination formula gear hobbing cutter subassembly for among gear hobbing machine, through the improvement to gear hobbing cutter subassembly, with chamfer/chamfer processing and gear hobbing processing operation integration together, and the production of avoiding the burr that can be fine, chamfer, gear hobbing, burring operation can be accomplished in one-time processing, have improved machining efficiency and part quality, and simple structure, and are with low costs.

Drawings

Fig. 1 is a side view of a hobbing cutter assembly according to a first embodiment of the present invention.

Fig. 2 is a front view of a hobbing cutter assembly according to a second embodiment of the present invention.

Fig. 3 is a side view of a hobbing cutter assembly according to a second embodiment of the present invention.

Fig. 4 is a perspective view of a spline shaft.

Fig. 5 is an enlarged view of the area a in fig. 4.

Fig. 6 is an enlarged view of the region B in fig. 4.

Fig. 7 is a perspective view of a ring gear.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and are not construed as limiting the present invention, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

In the description of the present invention, it is to be understood that the term: the center, vertically, transversely, length, width, thickness, upper and lower, preceding, back, left and right, vertical, level, top, end, inside and outside, clockwise, anticlockwise etc. indicate position or positional relationship for based on the position or positional relationship that the drawing shows, just for the convenience of description the utility model discloses and simplified description, consequently can not be understood as the restriction of the utility model. Furthermore, the terms: first, second, etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features shown. In the description of the present invention, unless explicitly stated or limited otherwise, the terms: mounting, connecting, etc. should be understood broadly, and those skilled in the art will understand the specific meaning of the terms in this application as they pertain to the particular situation.

Referring to fig. 1, in a combined hobbing cutter assembly in a first embodiment of the present application, the hobbing cutter assembly includes a cutter shaft 1, and a first hob 21 and a second hob 22 are provided on the cutter shaft 1; the first hob 21 is used for gear hobbing; the second hob 22 is used for chamfering/chamfering; and the cutting edges of the first hob 21 and the second hob 22 are in opposite directions for feeding from both sides, respectively.

The lower part of the cutter shaft 1 is arranged on a positioning seat 3, the positioning seat 3 can be movably arranged on a positioning plate 4 and used for moving the cutter shaft 1 and selecting a proper hob to perform corresponding processing operation.

In the combined hob assembly according to the first embodiment, the hob shaft 1 is provided with two hobs for performing different operations. During the rotation work process of the specific cutter shaft 1, the cutter shaft rotates at a low speed, the end part of the spline shaft to be machined is gradually close to the second hob 22 to be chamfered, and burrs are generated inwards during the process. After the chamfer processing finishes, integral key shaft and second hobbing cutter 22 separate, arbor 1 rotates at a high speed, the integral key shaft is close to first hobbing cutter 21 gradually and carries out the gear hobbing processing, in the process, first hobbing cutter 21 begins the feed from the opposite side of chamfer and removes to the chamfer position gradually, can outwards release the burr that processing chamfer in-process formed, play fine burring effect, simultaneously because the chamfer has already been processed, consequently the gear hobbing processing can not produce the burr in tip position, the burr is few on final product, and chamfer processing and gear hobbing processing are accomplished in one step, and machining efficiency and machining precision are improved, enterprise manufacturing cost has been saved.

Referring to fig. 2 and 3, the combined hobbing cutter assembly according to the second embodiment of the present application is different from the hobbing cutter assembly according to the first embodiment in that: the cutter shaft 1 is further provided with a third hob cutter 23, the third hob cutter 23 is used for chamfering/chamfering, and the cutting edges of the third hob cutter 23 and the second hob cutter 22 are opposite in direction and are used for feeding from two sides respectively. The hobbing cutter component in the structure is used for processing parts with chamfers/chamfers at two ends, when the hobbing cutter component is used for processing the parts, chamfers or chamfers are processed on two sides of a part processing position by the second hobbing cutter 22 and the third hobbing cutter 23 respectively, then tooth shapes are processed by the first hobbing cutter 21, chamfering operation and hobbing operation at two ends are completed in one step, and burrs cannot be generated.

Fig. 4 to 6 are schematic views of a spline shaft 9 and its upper structure, and it can be seen that the spline shaft 9 is provided with a first tooth portion 92 and a second tooth portion 91.

When the first tooth portion 92 is machined, the hobbing cutter assembly in the first embodiment is used, the second hobbing cutter 22 is firstly used for feeding from the right side in fig. 6, radial additional axial movement and indexing movement of hobbing are carried out to realize chamfering/chamfering operation of a cutting end, a first chamfer 921 is machined, burrs from right to left can be generated in the process, then the second hobbing cutter 22 retracts, the first hobbing cutter 21 is used for feeding from left to right to machine the first tooth shape 923, burrs in the last step can be removed in the machining process, machining efficiency is high, and deburring operation is completed at the same time.

When the second tooth 91 is machined, the hobbing cutter assembly in the second embodiment is used, the second hob 22 is firstly used for feeding from the right side in fig. 5 to machine the second chamfer 912, burrs from the right side to the left side are generated in the process, then the third hob 23 is used for feeding from the left side in fig. 5 to machine the third chamfer 911, burrs from the left side to the right side are generated in the process, finally the first hob 21 is used for feeding from the left side to the right side to machine the second tooth 913, certain regressive operation is performed in the machining process, burrs in the two steps can be removed, the machining efficiency is high, and meanwhile, the deburring operation is completed.

In another scheme, when the second tooth portion 91 is machined, the hobbing cutter assembly in the second embodiment may be used, the first hob 21 is used to machine the second tooth shape 913 normally, after the first hob 21 is withdrawn, the second hob 22 is moved to a position on the right side where chamfering/chamfering is needed, cutting is performed, a radial and axial additional motion and indexing motion of the hob are performed to realize chamfering/chamfering operation at a cutting end, and a second chamfer 912 is machined; the third hob 23 then machines a third chamfer 911 from the left side.

Fig. 7 shows a schematic view of a ring gear 8, on which the tooth profile can also be machined with the hobbing cutter assembly according to the second embodiment.

In a specific processing method, the cutter shaft 1 can rotate forwards or backwards as required, so that cutter feeding operation in different directions is realized.

The above description can be seen, the utility model provides a combination formula gear hobbing cutter subassembly for among gear hobbing machine, through the improvement to gear hobbing cutter subassembly, with chamfer/chamfer processing and gear hobbing processing operation integration together, and the production of avoiding the burr that can be fine, chamfer, gear hobbing, burring operation can be accomplished in one-time processing, has improved machining efficiency and part quality, and simple structure, and is with low costs.

The protection scope of the present invention includes but is not limited to the above embodiments, the protection scope of the present invention is subject to the claims, and any replacement, deformation, and improvement that can be easily conceived by those skilled in the art made by the present technology all fall into the protection scope of the present invention.

Claims (4)

1. The combined hobbing cutter assembly is characterized by comprising a cutter shaft (1), wherein the cutter shaft (1) is provided with a first hobbing cutter (21) and a second hobbing cutter (22);

the first hob (21) is used for hobbing;

the second hob (22) is used for chamfering/chamfering.

2. A combined hob assembly according to claim 1, characterized in, that the cutting edges of the first hob (21) and the second hob (22) are opposite.

3. A combined hob assembly according to claim 1, characterized in, that a third hob (23) is further provided on the arbor (1), said third hob (23) is used for chamfering/chamfering, and the cutting edges of the third hob (23) and the second hob (22) are in opposite directions.

4. The combined hobbing cutter assembly according to claim 1, wherein the lower part of the cutter shaft (1) is arranged on a positioning seat (3), and the positioning seat (3) is movably arranged on a positioning plate (4).

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