CN216297983U

CN216297983U - Combined gear hot back-turning double-shaft shoulder clamp

Info

Publication number: CN216297983U
Application number: CN202122448869.0U
Authority: CN
Inventors: 柯昌全; 刘景瑞; 余宝坤; 张双喜; 朱建国
Original assignee: Shaanxi Fast Gear Co Ltd
Current assignee: Shaanxi Fast Gear Co Ltd
Priority date: 2021-10-11
Filing date: 2021-10-11
Publication date: 2022-04-15
Anticipated expiration: 2031-10-11

Abstract

The utility model discloses a double-shaft shoulder clamp for hot rear turning of a combined gear, which is provided with a first body, wherein a first tip is embedded in the first body along the axial direction; the first tip is coated with a support body, and the support body limits the first tip in the axial direction and the radial direction; and a second centre is coaxially arranged opposite to the first centre. The axial precision of the size can be guaranteed by the clamp under the condition that coaxiality and radial runout of shaft shoulders on two sides are guaranteed.

Description

Combined gear hot back-turning double-shaft shoulder clamp

Technical Field

The utility model belongs to the field of machining tools, and particularly relates to a double-shaft shoulder clamp for hot rear turning of a combined gear.

Background

Currently, in the industry, gear parts are machined by clamping in a manner of tip plus floating three-jaw or tip plus end drive. The centre + the floating three-jaw clamp has the advantages that the clamping force is large, the defect is that the centre is easily biased by the three-jaw clamp, the radial jump of parts is unqualified, the size of the clamp is large, and the floating three-jaw clamp is easily interfered with a tool rest. For example, when the part is clamped by a tip and a floating three-jaw, the floating three-jaw interferes with the tool rest; on the other hand, if the three-jaw is extended too long to avoid the interference of the floating three-jaw, the rigidity of the three-jaw is poor, and the stability of the processing result is poor.

The center and the end driver have the advantages of good centering effect and compact clamp structure, but the axial positioning precision is poor. When the centre and the end drive are used for clamping, the depth deviation of the central hole is about 0.15mm due to the fact that the central hole is drilled in front of the shaft gear in a hot mode and the central hole is ground in a hot mode, and therefore the stability of the axial dimension D is difficult to guarantee.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a combined gear hot-back-turning double-shaft-shoulder clamp which can ensure the axial precision of the size under the condition of ensuring the coaxiality and radial runout of shaft shoulders on two sides.

In order to solve the technical problem, the utility model provides a solution:

a double-shaft shoulder clamp for hot rear turning of a combined gear is provided with a first body, wherein a first tip is embedded in the first body along the axial direction; the first tip is coated with a support body, and the support body limits the first tip in the axial direction and the radial direction; and a second centre is coaxially arranged opposite to the first centre.

Optionally, the support body is a conical cavity structure; the supporting cavity, the first limiting cavity and the second limiting cavity are sequentially arranged along the axial direction; the first limiting cavity is used for axially and radially limiting the first tip, and the second limiting cavity is used for axially and radially limiting a part to be processed.

Optionally, a detection window and a radial driving screw are arranged on the wall of the second limiting cavity; the detection window is opened along the end part of the cavity wall.

Optionally, the plurality of detection windows are arranged at intervals along the circumferential direction of the wall of the second limiting cavity.

Optionally, a spring is arranged between the first body and the first tip.

Optionally, a second body is axially arranged opposite to the first body, and a second tip is axially and fixedly arranged on the second body.

Optionally, a first connecting bolt is arranged on the first body and used for connecting the first body with the processing machine tool.

Optionally, a second connecting bolt is arranged on the first body and used for axially butting the first body and the support body.

Optionally, the first body is a cylinder structure; the first center is embedded in the cylindrical structure, the embedded end of the first center is also in the cylindrical structure, and a spring is arranged in the embedded end of the first center.

A double-shaft shoulder clamp for hot rear turning of a combined gear is provided with a first body, wherein a first tip is embedded in the first body along the axial direction; a second body is axially arranged opposite to the first body, and a second tip is axially and fixedly arranged on the second body; a supporting body is arranged by wrapping the first tip, and the supporting body is of a conical cavity structure; the supporting cavity, the first limiting cavity and the second limiting cavity are sequentially arranged along the axial direction; the first limiting cavity limits the first tip axially and radially, and the second limiting cavity limits the part to be processed axially and radially; a detection window and a radial driving screw are arranged on the wall of the second limiting cavity; the detection window is opened along the end part of the cavity wall; a spring is arranged between the first body and the first tip.

By the technical scheme, the problems of radial run-out and accurate axial positioning are solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

FIG. 1 is a schematic structural view of a double-shoulder clamp for hot rear turning of a composite gear according to the present invention;

FIG. 2 is a schematic structural view of the support body of FIG. 1;

FIG. 3 is a partial top view of FIG. 2;

the notation in the figure is:

1-a first body, 11-a first connecting bolt, 12-a second connecting bolt, 2-a first tip, 3-a support body, 31-a radial driving screw, 32-a radial driving screw mounting position, 33-an inspection window, 34-a second connecting bolt mounting position, 35-a support cavity, 36-a first limit cavity and 37-a second limit cavity; 4-spring, 5-second tip, 6-second body, 7-part to be processed, and 8-processing machine tool.

Detailed Description

The design ideas, the characteristics and the technical effects of the present invention are described in detail and completely in the following with reference to the accompanying drawings and the preferred embodiments. It should be understood that the preferred embodiments described herein are for purposes of illustration and explanation only and are not intended to limit the utility model. Based on the embodiments described in the present disclosure, other embodiments obtained by persons skilled in the relevant art without invasive labor are within the scope of the present disclosure.

With reference to fig. 1-3, the fixture for hot rear-turning of a double-shaft shoulder of a combined gear of the present disclosure is provided with a first body 1, and a first tip 2 is embedded in the first body 1 along an axial direction; the first finial 2 is coated with a support body 3, and the support body 3 axially and radially limits the first finial 2; a second point 5 is arranged coaxially opposite the first point 2. The method firstly solves the problem of radial run-out guarantee capability: for example, the radial run-out requirement of 0.006 mm of the part 7 to be machined is relatively strict, and in order to meet the requirement of form and position tolerance, a double-tip centering structural design is specially adopted. The first center 2 is a floating center and is matched with the first body 1, and the matching clearance of the first center and the first body in the diameter direction is ensured to be less than 0.003 mm. The second centre 5 rotates along with the tailstock of the processing machine tool 8, and the radial runout is less than 0.002 mm. After the two parts are centered together, the radial run-out of the parts can be guaranteed to be within 0.006 mm.

In the embodiment of the present disclosure, the support body 3 is a tapered cavity structure; the supporting cavity 35, the first limiting cavity 36 and the second limiting cavity 37 are sequentially arranged along the axial direction; the first limiting cavity 36 limits the first tip 2 axially and radially, and the second limiting cavity 37 limits the part 7 to be machined axially and radially. The arrangement of the support body 3 can protect and limit the tip structure, and can also protect and limit the part 7 to be processed, so that the processing process is more stable. Meanwhile, the support body 3 is provided with a radial driving screw mounting position 32 and a second connecting bolt mounting position 34 for mounting the radial driving screw 31 and the second connecting bolt 12.

In the embodiment of the present disclosure, the wall of the second limiting cavity 37 is provided with a detection window 33 and a radial driving screw 31; the probe window 33 is open along the cavity wall end. Then the problem of the driving force of the clamp is solved: in order to solve the problem, three symmetrically distributed radial driving screws 31 are specially arranged, the screws radially extend into a tooth groove of a shaft gear, and the screws are contacted with one side of the tooth groove in the rotation process of a machine tool spindle to provide driving force; in order to prevent the screw from crushing the tooth surface of the shaft gear, the material of the screw is 45 steel (screw hardness HRC35, part hardness HRC60), and the radial driving screw 31 can be replaced periodically as required.

In the embodiment of the present disclosure, the detecting windows 33 are plural and are arranged at intervals along the circumferential direction of the cavity wall of the second limiting cavity 37. For example, three springs 33 and three radial driving screws are provided, and the problem that the shaft gear tooth part collides with the radial driving screw is solved: in order to prevent the tooth surface of a part from colliding with a radial driving screw in the process of clamping, two measures are adopted: firstly, three symmetrically distributed detection windows 33 are formed, and the three detection windows 33 and the three radial driving screws 31 are respectively arranged on the same bus of the support body 3, so that an operator can see the positions of tooth grooves in the part clamping process, and the radial driving screws 31 can appear in the tooth grooves of the shaft gear. ② the head of the radial driving screw 31 is made into a circle, and the diameter is smaller than the width of the tooth space corresponding to the position. Therefore, the radial driving screw 31 can not be contacted with the tooth surface in the part clamping process, and only in the rotation process of the main shaft of the machine tool, the radial driving screw 31 can be contacted with the tooth surface on one side.

In an embodiment of the present disclosure, a spring 4 is arranged between the first body 1 and the first tip 2. The axial positioning problem is solved: because the depth variation of the central hole of the shaft gear is about 0.15mm, the central hole cannot be used for axial positioning, which is also the reason that the first centre 2 adopts a floating centre, and the right end face of the support is specially used for axially positioning the part in order to ensure the stability of the axial dimension. For example, in the embodiment of the present disclosure, the second body 6 is disposed opposite to the first body 1 in the axial direction, and the second tip 5 is axially fixed on the second body 6.

Specifically, in the embodiment of the present disclosure, a first connecting bolt 11 is provided on the first body 1 for connecting the first body 1 and the processing machine 8.

Specifically, in the embodiment of the present disclosure, a second coupling bolt 12 is provided on the first body 1 for axially abutting the first body 1 and the support body 3.

Specifically, in the embodiment of the present disclosure, the first body 1 is a cylindrical structure; the first centre 2 is embedded in the cylindrical structure, the embedded end of the first centre 2 is also in the cylindrical structure, and a spring 4 is arranged in the embedded end.

The first embodiment is as follows:

with reference to fig. 1 and 2, the specific combined gear hot back-turning double-shaft shoulder clamp of the present disclosure is provided with a first body 1, and a first tip 2 is embedded in the first body 1 along an axial direction; a second body 6 is arranged opposite to the first body 1 in the axial direction, and a second tip 5 is axially and fixedly arranged on the second body 6; the first tip 2 is coated with a support body 3, and the support body 3 is of a conical cavity structure; the supporting cavity 35, the first limiting cavity 36 and the second limiting cavity 37 are sequentially arranged along the axial direction; the first limiting cavity 36 limits the first tip 2 axially and radially, and the second limiting cavity 37 limits the part 7 to be machined axially and radially; the wall of the second limit cavity 37 is provided with a detection window 33 and a radial driving screw 31; the probe window 33 is open along the cavity wall end; a spring 4 is arranged between the first body 1 and the first tip 2. The first body 1 is connected to the machine tool by 3 first connecting bolts 11, the spring 4 is placed in the inner hole of the first centre 2, and then the first centre 2 is placed in the inner hole of the first body 1 together with the spring 4. The support body 3 is connected with the first body 1 through 3 second connecting bolts 12, the radial driving screw 31 is acted on the support body 3 through a thread side effect, and the second centre 5 is tightly pressed against the machined part from the axial direction.

The specific operation steps comprise:

the first step is as follows: the method comprises the steps that a first body 1 is connected to a processing machine tool 8 in advance through a first connecting bolt 11, then radial runout of an inner hole of the first body 1 is adjusted through a dial indicator until the radial runout of the inner hole of the first body 1 is smaller than 0.002 mm, the first connecting bolt 11 is screwed down, and the first body 1 is firmly connected to the processing machine tool 8;

the second step is that: the spring 4 is placed in the inner bore of the first point 2 and then the first point 2 together with the spring 4 is placed in the inner bore of the first body 1. Then, the support body 3 is pre-installed on the first body 1 through 3 second connecting bolts 12, radial runout of the inner hole at the rightmost end of the support body 3 is adjusted by a dial indicator until the radial runout of the inner hole at the rightmost end of the support body 3 is smaller than 0.005 mm, and then the support body 3 is firmly installed on the first body 1;

the third step: the radial driving screw 31 is connected to the supporting body 3 through a thread pair, and the length of the extending part of the radial driving screw 31 in the inner hole of the supporting body 3 is required to be 2 mm;

the fourth step: when the machining device is used, the tooth grooves of the shaft gear of the part 7 to be machined are aligned to the detection window of the support body 3, then the second tip 5 axially abuts against the part 7 to be machined until the small end face of the leftmost side of the sheet gear is attached to the end face of the right side of the support body 3, then the machining machine tool 8 is started, and the part 7 to be machined is machined normally.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. The hot rear turning double-shaft shoulder clamp for the combined gear is characterized in that a first body (1) is arranged, and a first tip (2) is embedded in the first body (1) along the axial direction;

the first centre (2) is coated with the supporting body (3), and the supporting body (3) limits the first centre (2) in the axial direction and the radial direction;

and a second centre (5) is coaxially arranged opposite to the first centre (2).

2. The dual-shaft shoulder clamp for hot rear turning of the combination gear according to claim 1, wherein the supporting body (3) is of a conical cavity structure;

a supporting cavity (35), a first limiting cavity (36) and a second limiting cavity (37) are sequentially arranged along the axial direction;

the first limiting cavity (36) is used for axially and radially limiting the first tip (2), and the second limiting cavity (37) is used for axially and radially limiting the part (7) to be processed.

3. The hot back-turning double-shaft shoulder clamp for the combination gear according to claim 2, wherein a detection window (33) and a radial driving screw (31) are arranged on the wall of the second limiting cavity (37);

the detection window (33) is opened along the end part of the cavity wall.

4. The dual-shaft shoulder clamp for hot rear turning of the combined gear according to claim 3, wherein a plurality of the detection windows (33) are arranged at intervals along the circumferential direction of the cavity wall of the second limiting cavity (37).

5. The jig for hot back-lathing double shoulders of a combination gear according to claim 1, 2, 3 or 4 is characterized in that a spring (4) is arranged between the first body (1) and the first apex (2).

6. The dual-shoulder clamp for hot rear-turning of the combination gear according to the claim 1, 2, 3 or 4, characterized in that a second body (6) is arranged opposite to the first body (1) in the axial direction, and a second tip (5) is axially fixed on the second body (6).

7. A double shoulder clamp for hot back-lathing of a cluster gear according to claim 1, 2, 3 or 4, characterized in that a first connecting bolt (11) is provided on the first body (1) for connecting the first body (1) to the machining tool (8).

8. A double shoulder clamp for hot back-lathing of a combination gear according to claim 1, 2, 3 or 4, characterized in that a second connecting bolt (12) is provided on the first body (1) for axially butt-jointing the first body (1) and the support body (3).

9. The jig for hot back-lathing double shaft shoulders of a combination gear as claimed in claim 1, 2, 3 or 4, wherein the first body (1) is of a cylindrical structure;

the first centre (2) is embedded in the cylindrical structure, the embedded end of the first centre (2) is also in the cylindrical structure, and a spring (4) is arranged in the embedded end.

10. The hot rear turning double-shaft shoulder clamp for the combined gear is characterized in that a first body (1) is arranged, and a first tip (2) is embedded in the first body (1) along the axial direction; a second body (6) is arranged opposite to the first body (1) in the axial direction, and a second tip (5) is axially and fixedly arranged on the second body (6);

the first tip (2) is wrapped and provided with a support body (3), and the support body (3) is of a conical cavity structure; a supporting cavity (35), a first limiting cavity (36) and a second limiting cavity (37) are sequentially arranged along the axial direction; the first limiting cavity (36) is used for axially and radially limiting the first tip (2), and the second limiting cavity (37) is used for axially and radially limiting the part (7) to be processed; a detection window (33) and a radial driving screw (31) are arranged on the wall of the second limit cavity (37); the detection window (33) is opened along the end part of the cavity wall;

a spring (4) is arranged between the first body (1) and the first tip (2).