CN223406130U

CN223406130U - A gear hobbing tool with repeated positioning function

Info

Publication number: CN223406130U
Application number: CN202422523511.3U
Authority: CN
Inventors: 黄松林; 张红章
Original assignee: CHENGDU HAONENG TECHNOLOGY CO LTD
Current assignee: CHENGDU HAONENG TECHNOLOGY CO LTD
Priority date: 2024-10-18
Filing date: 2024-10-18
Publication date: 2025-10-03
Anticipated expiration: 2034-10-18

Abstract

The present invention relates to the technical field of spline processing, and specifically discloses a gear hobbing tool with a repeatable positioning function. The tool is characterized by comprising a gear hobbing device for clamping a workpiece, and a positioning tool mounted on the outside of the gear hobbing tool and used to position the workpiece. The positioning tool comprises a guide rod slidably mounted on the outside of the gear hobbing tool and arranged along the Z axis, and a positioning pin mounted on the guide rod and movable along the X axis. The present invention, by providing the positioning tool, can effectively reposition a reworked workpiece. After the positioning meets the processing requirements, the gear hobbing device is used to clamp the workpiece, and the hob is used to perform rework on the workpiece.

Description

Gear hobbing frock with repeated locate function

Technical Field

The utility model relates to the technical field of spline machining, in particular to a gear hobbing tool with a repeated positioning function.

Background

In daily machining, the external spline of the gear is commonly provided with straight teeth, spiral teeth and inverted conical teeth, the common machining mode of the spline is gear hobbing, gear shaping, gear scraping, gear shaving, gear grinding and the like, if all the machining processes are normal, all the machined products can meet the drawing size requirement, but the situation that the size is out of tolerance inevitably occurs in working is ensured, and the parameters of a machine tool are changed for the unprocessed products.

In the case of the external spline of the gear, the tooth root circle of the spline teeth and the cross bar distance size are over-inferior, and the workpiece can only be scrapped, but if the cross bar distance size is over-superior, the tooth root circle of the spline teeth has machining allowance, the machining can be performed to ensure that the size reaches the qualified range, and in the whole mechanical industry, the gear workpiece spline teeth are reworked, how accurate and repeated positioning is very difficult, and if the positioning is inaccurate, the size of the workpiece after the reworking is difficult to reach the drawing requirement;

In the debugging and production of the external spline gear, the phenomenon that a plurality of workpieces with ultra-poor span and rod distance sizes are accumulated in daily life is unavoidable, and most of ultra-poor parts are directly scrapped due to the fact that tools capable of reworking the workpieces are not available in many times, so that certain economic loss is caused.

For the workpiece with the over-tolerance of the span rod distance size, which belongs to the straight-tooth gear, manual tooth alignment can be tried, a worker holds the measuring rod to lean against the external spline key groove of the workpiece, and reworks one workpiece to repeat tooth alignment, but the method is only applicable to the straight-tooth gear, if the workpiece meets a bevel gear or a back taper gear, the method cannot be adopted, but the method is low in efficiency, poor in positioning accuracy and high in operating capacity of the worker, so that the workpiece is not willing to be reworked by adopting a manual tooth alignment mode in most of the factory.

Disclosure of utility model

The utility model aims to solve the technical problem of providing a gear hobbing tool with a repeated positioning function, which can effectively perform repeated positioning on a straight tooth external gear, an external spline back taper gear and a spiral external spline gear to finish reworking of a workpiece;

the utility model solves the technical problems by adopting the following solution:

The gear hobbing tool with the repeated positioning function comprises a gear hobbing device used for clamping a workpiece and a positioning tool which is arranged on the outer side of the gear hobbing tool and used for positioning the workpiece;

The positioning tool comprises a guide rod which is slidably arranged on the outer side of the gear hobbing tool and arranged along the Z axis, and a positioning pin rod which is arranged on the guide rod and moves along the X axis direction.

In some possible embodiments, the positioning tool further comprises a base which is arranged outside the gear hobbing device and used for installing a guide rod, wherein the base is provided with a mounting hole, and the guide rod is sleeved in the mounting hole and is in sliding fit with the base along the axial direction of the mounting hole.

In some possible embodiments, a locking member for locking the guide bar to the base is provided on the base.

In some possible embodiments, a fixed block for installing a locating pin rod is arranged on the top of the guide rod, a through hole is arranged on the fixed block, and the locating pin rod is sleeved in the through hole and is in sliding fit with the fixed block along the X-axis direction.

In some possible embodiments, the base comprises a bracket connected with the hobbing device through a bolt, and a fixing seat which is arranged on the bracket and is used for installing the guide rod, and the mounting hole is arranged on the fixing seat.

In some possible embodiments, a waist-shaped hole matched with the bolt is arranged on the bracket, and the long axis of the waist-shaped hole is horizontally arranged.

In some possible embodiments, the hobbing device comprises a base, an expanding sleeve type clamping assembly mounted on the base and used for clamping and fixing a workpiece, and the base is mounted on the outer side face of the base.

In some possible embodiments, the expansion sleeve type clamping assembly comprises a positioning seat mounted on the base, an expansion sleeve mounted on the positioning seat, a lower tray sleeved outside the positioning seat and used for supporting a workpiece sleeved outside the expansion sleeve, an upper tray arranged above the expansion sleeve and used with the lower tray, an upper pull rod with one end connected with the upper tray and the other end penetrating through the positioning seat of the expansion sleeve, and a lower pull rod connected with one end of the upper pull rod far away from the upper tray;

the upper pull rod, the lower pull rod, the positioning seat and the expansion sleeve are coaxially connected.

Compared with the prior art, the utility model has the beneficial effects that:

According to the utility model, the workpiece can be effectively repositioned by arranging the positioning tool, after the positioning meets the processing requirement, the workpiece is clamped by the gear hobbing device, and the reworking processing of the workpiece is realized by the hob;

The utility model has simple structure and strong practicability.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a cross-sectional view of the present utility model;

FIG. 3 is a schematic view of a base structure according to the present utility model;

FIG. 4 is a schematic view of the structure of the guide rod of the present utility model;

FIG. 5 is a schematic view of the structure of the present utility model when the workpiece is positioned;

The gear hobbing device comprises a gear hobbing device, a base, a tensioning sleeve type clamping assembly, a hob, a positioning tool, a guide rod, a positioning pin rod, a base, a support, 3311, a waist-shaped hole, 332, a fixing seat, 3321, a mounting hole, 34, a fixing block, 35, a locking piece, 341, a through hole, 10, a workpiece, 101 and a spline tooth slot, wherein the gear hobbing device comprises a tensioning sleeve type clamping assembly, a hob, a positioning tool, a guide rod, a positioning pin rod, a base, a support, a waist-shaped hole, 332, a fixing seat, a mounting hole, 34 and a fixing block.

Detailed Description

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, directly connected, indirectly connected via an intermediate medium, or in communication with each other between two elements or in an interaction relationship between two elements. Reference to "first," "second," and similar terms herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. In the implementation of the present utility model, "and/or" describes the association relationship of the association object, which means that there may be three relationships, for example, a and/or B, and that there may be three cases where a exists alone, while a and B exist together, and B exists alone. In the description of the embodiments of the present utility model, unless otherwise indicated, the meaning of "a plurality" means two or more. For example, a plurality of positioning posts refers to two or more positioning posts. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The present utility model will be described in detail below.

As shown in fig. 1-4:

The gear hobbing tool with the repeated positioning function comprises a gear hobbing device 1 for clamping a workpiece 10 and a positioning tool 3 which is arranged on the outer side of the gear hobbing tool and used for positioning the workpiece 10;

the positioning tool 3 comprises a guide rod 31, a positioning pin rod 32 and a base 33, wherein the guide rod 31 is slidably arranged on the outer side of the gear hobbing tool and is arranged along the Z axis, the positioning pin rod 32 is arranged on the guide rod 31 and moves along the X axis, the base 33 is arranged on the outer side of the gear hobbing device 1 and is used for installing the guide rod 31, the base is slidably matched with the guide rod 31 along the Z axis, and the positioning pin rod 32 is mutually perpendicular to the guide rod 31.

When the positioning fixture is used, firstly, the workpiece 10 is sleeved on the outer side of the gear hobbing device 1, the workpiece 10 is machined, after machining is finished, the workpiece 10 is not removed, the guide rod 31 is controlled to move along the Z-axis direction, the positioning pin rod 32 is aligned with the spline tooth groove 101 of the workpiece 10, the position of the base 33 used for fixing the guide rod 31 on the positioning fixture 3 is adjusted, the base 33 is fixed, and then the positioning fixture 3 can position the subsequent reworked workpiece 10;

Clamping a workpiece 10 to be reworked on the gear hobbing device 1, upwards sliding a guide rod 31 along the Z-axis direction, controlling the axis of a positioning pin rod 32 to be at the middle part of the tooth width of a spline tooth slot 101, and then fixing the guide rod 31;

Moving the positioning pin rod 32 in the X-axis direction so that one end of the positioning pin rod 32, which is close to the hobbing device 1, is close to the workpiece 10, and so that the spline tooth groove 101 of the workpiece 10 is in contact with the end of the hobbing positioning pin 32, that is, positioning of the reworked workpiece 10 is completed, and the workpiece 10 is clamped by the hobbing device 1;

The positioning pin rod 32 moves to the side far away from the gear hobbing device 1, the guide rod 31 is controlled to slide downwards, interference between the positioning tool 3 and the hob 2 during gear hobbing is avoided, and reworking treatment is carried out;

And (3) reworking the corresponding cutter according to the out-of-tolerance size, measuring the size of the reworked workpiece 10 after reworking is completed, evaluating whether the workpiece 10 is qualified, if the workpiece is free of problems, carrying out batch reworking operation, and if the workpiece is free of problems, adjusting the positioning tool 3 again until the reworking of the workpiece 10 is qualified, thereby meeting the technological requirements.

In some possible embodiments, in order to effectively realize the sliding fit of the positioning tool 3 and the gear hobbing device 1, a mounting hole 3321 is arranged on the base 33, the guide rod 31 is sleeved in the mounting hole 3321 and is in sliding fit with the base 33 along the axial direction of the mounting hole 3321, and a locking piece 35 for locking the guide rod 31 and the base 33 is arranged on the base 33.

The mounting hole 3321 is in a through hole shape and is used for sleeving the guide rod 31, and the guide rod 31 can slide in the Z-axis direction in the mounting hole 3321, so that the position of the positioning pin rod 32 arranged at the top of the guide rod 31 is adjusted;

Specifically, the locking piece 35 is a screw, and a threaded hole which is matched with the screw for use and is communicated with the mounting hole 3321 is arranged on the base 33;

further, the locking members 35 are provided in at least two groups.

The base 33 comprises two groups of brackets 331 and a fixed seat 332, wherein the brackets 331 are connected with the gear hobbing device 1 through bolts, and the fixed seat 332 is arranged on the brackets 331 and is used for installing the guide rod 31;

A waist-shaped hole 3311 matched with the bolt is arranged on the bracket 331, and the long axis of the waist-shaped hole 3311 is horizontally arranged;

Specifically, a threaded hole matched with a bolt is arranged at the outer side of the gear hobbing device 1, and the bolt passes through the waist-shaped hole 3311 to be matched with the threaded hole;

The base 33 is arranged on the outer side of the gear hobbing device 1 through the bracket 331, and the relative position of the base 33 and the gear hobbing device 1 can be adjusted through the arrangement of the waist-shaped hole 3311, so that the axis of the positioning pin rod 32 can be positioned at the middle part of the spline tooth groove 101;

In some possible embodiments, a fixed block 34 for installing the locating pin rod 32 is arranged on the top of the guide rod 31, a through hole 341 is arranged on the fixed block 34, and the locating pin rod 32 is sleeved in the through hole 341 and is in sliding fit with the fixed block 34 along the X-axis direction.

The fixed block 34 and the guide rod 31 are integrally formed, the axis of the through hole 341 is arranged along the X-axis direction, the positioning pin rod 32 is sleeved in the through hole 341, and when positioning, one end of the positioning pin rod 32, which is close to the hobbing device 1, moves to the side, which is close to the workpiece 10.

In order to effectively realize the clamping and fixing of the workpiece 10 by the hobbing device 1 and the processing of the workpiece 10 by the hob 2, the hobbing device 1 is in the prior art and comprises a base 11 for mounting a base 33 and an expanding sleeve type clamping assembly which is mounted on the base 11 and is used for clamping and fixing the workpiece 10, wherein the base 33 is mounted on the outer side surface of the base 11;

specifically, the expansion sleeve type clamping assembly 12 comprises a positioning seat installed on the base 11, an expansion sleeve installed on the positioning seat and used for expanding the workpiece 10, a lower tray sleeved on the outer side of the positioning seat and used for supporting the workpiece 10 sleeved on the outer side of the expansion sleeve, an upper tray arranged above the expansion sleeve and used in cooperation with the lower tray, an upper pull rod with one end connected with the upper tray and the other end penetrating through the positioning seat of the expansion sleeve, and a lower pull rod connected with one end, far away from the upper tray, of the upper pull rod, wherein the upper pull rod, the lower pull rod, the positioning seat and the expansion sleeve are coaxially connected.

The utility model is not limited to the specific embodiments described above. The utility model extends to any novel one, or any novel combination, of the features disclosed in this specification, as well as to any novel one, or any novel combination, of the steps of the method or process disclosed.

Claims

1. The gear hobbing tool with the repeated positioning function is characterized by comprising a gear hobbing device used for clamping a workpiece and a positioning tool which is arranged on the outer side of the gear hobbing tool and used for positioning the workpiece;

2. The gear hobbing tool with the repeated positioning function according to claim 1, wherein the positioning tool further comprises a base which is arranged on the outer side of the gear hobbing device and used for installing a guide rod, and the base is provided with a mounting hole, and the guide rod is sleeved in the mounting hole and is in sliding fit with the base along the axial direction of the mounting hole.

3. The hobbing tool with repeated positioning function according to claim 2, wherein a locking member for locking the guide bar to the base is arranged on the base.

4. The gear hobbing tool with the repeated positioning function, which is disclosed by claim 2, is characterized in that a fixed block for installing a positioning pin rod is arranged on the top of the guide rod, a through hole is formed in the fixed block, and the positioning pin rod is sleeved in the through hole and is in sliding fit with the fixed block along the X-axis direction.

5. The hobbing tool with the repeated positioning function according to claim 2, wherein the base comprises a bracket connected with the hobbing device through a bolt and a fixing seat which is arranged on the bracket and is used for installing a guide rod, and the mounting hole is formed in the fixing seat.

6. The hobbing tool with repeated positioning function according to claim 5, wherein a waist-shaped hole matched with the bolt is formed in the support, and the long axis of the waist-shaped hole is horizontally arranged.

7. The hobbing tool with repeated positioning function according to any one of claims 2-6, wherein the hobbing device comprises a base, and an expanding sleeve type clamping assembly which is arranged on the base and is used for clamping and fixing a workpiece, and the base is arranged on the outer side face of the base.

8. The hobbing tool with repeated positioning function according to claim 7, wherein the expansion sleeve type clamping assembly comprises a positioning seat arranged on a base, an expansion sleeve arranged on the positioning seat, a lower tray sleeved outside the positioning seat and used for supporting a workpiece sleeved outside the expansion sleeve, an upper tray arranged above the expansion sleeve and used with the lower tray, an upper pull rod, one end of which is connected with the upper tray, the other end of which passes through the positioning seat of the expansion sleeve, and a lower pull rod, and one end of which is connected with the upper pull rod, which is far away from the upper tray;