CN219234569U

CN219234569U - Valve body turning transverse hole indexing fixture

Info

Publication number: CN219234569U
Application number: CN202222559491.6U
Authority: CN
Inventors: 竺君如; 汪涛; 王照
Original assignee: Ningbo Rian Valves Co ltd
Current assignee: Ningbo Rian Valves Co ltd
Priority date: 2022-09-27
Filing date: 2022-09-27
Publication date: 2023-06-23
Anticipated expiration: 2032-09-27

Abstract

The utility model provides a valve body turning transverse hole indexing fixture, which belongs to the technical field of valve body machining and comprises a U-shaped fixture main body, a numerical control chuck, an indexing positioning mechanism and a clamping fixing mechanism; the numerical control chuck is connected with the clamp main body, and the central axis of the numerical control chuck is eccentrically arranged with the central axis of the clamp main body; the indexing positioning mechanism comprises an indexing base connected with the clamp main body, a plurality of indexing grooves are formed in the indexing base, an indexing disc is buckled and connected with the indexing base, one side of the indexing disc is provided with an indexing claw which is matched and spliced with the indexing grooves, and the other side of the indexing disc is provided with a positioning hole for positioning a valve body to be processed; the clamping mechanism comprises a bolt in threaded connection with the clamp main body, and one end of the bolt is connected with a clamping table; a clamping space for clamping the valve body to be processed is formed between the clamping table and the dividing plate. The device has the advantages of simple structure, convenient operation and accurate positioning, can realize the rotation balance of the clamp main body, and is favorable for ensuring the machining precision.

Description

Valve body turning transverse hole indexing fixture

Technical Field

The utility model belongs to the technical field of valve body machining, and particularly relates to a valve body turning transverse hole indexing fixture.

Background

Currently, part of the valve body is shaped like a three-way or multi-way joint style, i.e. the side of the valve body has one or more transverse holes for which machining with a lathe is required. At present, the transverse hole of the valve body is clamped by a chuck on an ordinary lathe, and the valve body needs to be clamped for a plurality of times to finish turning work according to the traditional processing technology, and the existing mode has the following defects: the positioning and clamping times are more, the repeated positioning times are more, the auxiliary time is long, and the accuracy is difficult to guarantee due to large accumulated errors. Through searching, a mode of auxiliary clamping by using a clamp appears in the prior art, for example, patent with the authority of publication number CN 204449929U discloses a transverse hole turning clamp for a valve body of a gas meter, and the clamp comprises a U-shaped frame, a clamping column, a positioning substrate, a pressing plate, a pull rod, a pressure spring and other structures, and the clamping and fixing of the pressing plate to the valve body are realized by using the elasticity of the pressure spring. Although the device can realize the auxiliary clamping purpose, the device has the following problems in the use process: (1) The device can only process the valve body in a three-way joint mode, and can not realize the indexing function for the valve body with a plurality of transverse holes on the side face of the valve body, and when transverse holes in other directions are processed, manual auxiliary adjustment and positioning are needed, so that the problems of long auxiliary adjustment time, large positioning error and difficult guarantee of precision exist; (2) Because the clamp is arranged on the chuck of the lathe, when the clamp rotates, the clamp is pressed by a pressure spring, so that the clamping is not very stable and needs to be improved; (3) Because the valve body shape is irregular, when the centre gripping, regard the axis of U-shaped frame as the boundary point, the weight of its both sides is different, and the axis of centre gripping post and the axis collineation setting of U-shaped frame in above-mentioned device, this can lead to anchor clamps one side whole unbalance, and it can produce great vibration when rotatory, is unfavorable for guaranteeing machining precision, therefore, how to realize the rotatory balance of anchor clamps also is one of the technical problem that has to be considered.

Disclosure of Invention

In order to solve the problems in the prior art, the transverse hole indexing fixture for the valve body lathe is provided.

The technical scheme adopted for solving the technical problems is as follows:

the technical scheme provides a valve body turning transverse hole indexing fixture which comprises a U-shaped fixture main body, a numerical control chuck, an indexing positioning mechanism and a clamping fixing mechanism;

the numerical control chuck is connected with the clamp main body, and the central axis of the numerical control chuck is eccentrically arranged with the central axis of the clamp main body;

the indexing positioning mechanism comprises an indexing base connected with the clamp main body, a plurality of indexing grooves are formed in the indexing base, an indexing disc is buckled and connected with the indexing base, one side of the indexing disc is provided with an indexing claw which is matched and spliced with the indexing grooves, and the other side of the indexing disc is provided with a positioning hole for positioning a valve body to be processed;

the clamping and fixing mechanism comprises a bolt in threaded connection with the clamp main body, and one end of the bolt is connected with a clamping table; and a clamping space for clamping the valve body to be processed is formed between the clamping table and the index plate.

Preferably, the clamp main body is provided with an inserting hole; the numerical control chuck is of a shaft rod-shaped structure; one end of the numerical control chuck is also connected with a shaft shoulder, one side of the shaft shoulder is connected with a plug-in shaft, and the plug-in shaft is in fit plug-in connection with the jack; the shaft shoulder is positioned on the side wall of the clamp main body, and the clamp main body is connected with the shaft shoulder through bolts.

Preferably, the clamp main body is provided with a through hole, a nut is fixedly connected in the through hole, and the bolt is in threaded connection with the nut in a matched manner; the other end of the bolt is connected with a square head.

Preferably, a central hole is formed in the indexing base, a central shaft rod is connected to one side of the indexing disc, and the central shaft rod is in fit connection with the central hole.

Preferably, the clamping table is coaxially arranged with the bolt and the index plate.

Compared with the prior art, the utility model has the following advantages:

1. the central axis of the numerical control chuck in the device and the central axis of the clamp main body are eccentrically arranged, after the valve body to be machined is clamped, the weights on two sides of the clamp main body can be kept consistent, the rotation balance of the clamp main body is realized, and the machining precision is guaranteed.

2. The device is provided with the indexing positioning mechanism, the indexing positioning mechanism comprises an indexing base and an indexing disc, the indexing base and the indexing disc are connected in a buckling mode, an indexing groove is formed in the indexing base, an indexing claw is arranged on the indexing disc and is inserted and set in the indexing groove, the indexing claw and the indexing base can accurately realize positioning, when transverse holes in other directions are required to be machined, the positioning can be quickly realized, excessive manual adjustment is not required, and the working efficiency is improved.

3. The clamping of the valve body to be processed is realized by screwing the bolt in the clamping and fixing mechanism in use in the device in a bolt clamping mode, so that the device is simple and quick, and compared with a clamping mode of spring force, the clamping in the device is more reliable.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a perspective view of the structure of the present utility model.

Fig. 2 is a perspective view of the structure of the present utility model at another angle.

Fig. 3 is a front view of the structure of the present utility model.

Fig. 4 is a schematic view of a single body structure of the clamping head.

Fig. 5 is a schematic view of an indexing base structure.

Fig. 6 is a schematic view of the indexing base at another angle.

Fig. 7 is a schematic view of the indexing disk structure.

Fig. 8 is a schematic view of the indexing disk structure at another angle.

Fig. 9 is a cross-sectional view of the structure of fig. 3 taken along the direction A-A.

Fig. 10 is a schematic view of the structure of the present utility model in a valve body clamping state.

Fig. 11 is a cross-sectional view of the structure of fig. 10 taken along the direction A-A.

Fig. 12 is a schematic view of an indexing pawl configuration with a taper.

Reference numerals illustrate:

1, a numerical control chuck; 2, a shaft shoulder; 3, a clamp main body; 4, dividing a base; 401 a central bore; 5 dividing grooves; 6 dividing disc; 601 a central shaft; 7, indexing claws; 8, positioning holes; 9 bolts; 10 clamping tables; 11 square heads; a 12-nut; 13, inserting a shaft; 14 jacks; 15 valve body to be processed.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

As shown in fig. 1-11, this embodiment provides a valve body turning transverse hole indexing fixture, which includes a U-shaped fixture body 3, a numerical control chuck 1, an indexing positioning mechanism, and a clamping and fixing mechanism, and the following details of the mechanisms are explained:

the numerical control chuck 1 is connected with the clamp main body 3, and the central axis of the numerical control chuck 1 and the central axis of the clamp main body 3 are eccentrically arranged; the numerical control chuck 1 adopts a detachable bolting mode, and the concrete structure is as follows: the clamp body 3 is provided with an inserting hole 14; the numerical control chuck 1 is in a shaft rod-shaped structure; one end of the numerical control chuck 1 is also connected with a shaft shoulder 2, one side of the shaft shoulder 2 is connected with a plug-in shaft 13, the plug-in shaft is in fit plug-in connection with the jack 14, and the plug-in shaft 13 and the jack 14 have guiding and matching functions, so that the rapid alignment and installation of the numerical control chuck 1 are facilitated; the shaft shoulder 2 is positioned on the side wall of the clamp body 3, and the clamp body 3 is connected with the shaft shoulder 2 through bolts 9. The shaft shoulder 2 plays a role in positioning and expanding a connecting surface, so that bolting of the shaft shoulder 2 and the clamp main body 3 is conveniently and rapidly realized.

In the device, the central axis of the numerical control chuck 1 and the central axis of the clamp main body 3 are eccentrically arranged, after the valve body 15 to be machined is clamped, the weights on two sides of the clamp main body 3 can be kept consistent, the rotation balance of the clamp main body 3 is realized, and the machining precision is guaranteed.

The indexing positioning mechanism comprises an indexing base 4 connected with the clamp main body 3, and a plurality of indexing grooves 5 are formed in the indexing base 4, and in the embodiment, a four-indexing structure is selected; the indexing base 4 is connected with an indexing disc 6 in a buckled mode, one side of the indexing disc 6 is provided with an indexing claw 7 which is matched and spliced with the indexing groove 5, and the other side of the indexing disc 6 is provided with a positioning hole 8 for positioning a valve body 15 to be processed. The positioning hole 8 is an inner hexagonal hole, one end of the valve body 15 to be processed is of a hexagonal head structure, and the valve body 15 can be conveniently and accurately inserted into the positioning hole 8 for positioning. Through setting up graduation positioning mechanism, when the transverse hole of other directions of needs processing, can realize the location fast, need not artifical too much adjustment, improve work efficiency.

The clamping and fixing mechanism comprises a bolt 9 in threaded connection with the clamp main body 3, one end of the bolt 9 is connected with a clamping table 10, and the clamping table 10 is propped against the other end of the valve body 15 to be processed; a clamping space for clamping the valve body 15 to be processed is formed between the clamping table 10 and the index plate 6.

The clamping mode of the bolt 9 is adopted in the device, when the device is used, the bolt 9 in the clamping and fixing mechanism is screwed to clamp the valve body to be machined, the device is simple and quick, and compared with the clamping mode of spring force, the clamping in the device is more reliable.

The above-mentioned arrangement of the bolts 9 takes the following form: the clamp body 3 is provided with a through hole, a nut 12 is fixedly connected in the through hole, and the bolt 9 is in threaded connection with the nut 12 in a matched manner; the other end of the bolt 9 is connected with a square head 11. In use, the tightening/loosening of the bolt 9 is achieved by arranging a square key to rotate the square head 11.

In order to facilitate adjustment of the index plate 6, a central hole 401 is formed in the index base 4, one side of the index plate 6 is connected with a central shaft lever 601, the central shaft lever 601 is in fit connection with the central hole 401, and the central shaft lever 601 can freely rotate in the central hole 401; the central shaft 601 may act as a guide when the index plate 6 is rotated, so as not to completely disengage the index plate 6 from the index base 4.

The clamping table 10 is coaxially arranged with the bolt 9 and the index plate 6.

Alternatively, as shown in fig. 12, the index claw 7 may have a slope, and the sectional shape thereof may be a trapezoid; correspondingly, the indexing groove also has a slope, and the advantage of the arrangement is that the four indexing claws 7 have a self-centering effect, and the positioning can be accurately realized by the slope and the indexing base.

Working principle:

when in use, the numerical control chuck 1 is connected with a chuck of a machine tool; placing the valve body 15 to be processed on the index plate 6, and inserting the hexagon head of the valve body 15 to be processed into the positioning hole 8 for positioning; the square key is inserted into the square head 11 and screwed, so that the bolt 9 moves towards the valve body to be processed until the clamping table 10 is pressed on the end part of the valve body to be processed, and the clamping and fixing of the workpiece are completed; then carrying out a transverse hole working procedure on one transverse hole; after the transverse hole is machined, the bolt 9 is unscrewed, the direction of the index plate 6 is adjusted together with the valve body 15 to be machined, the direction of the valve body 15 to be machined is further adjusted, the transverse hole in the other direction is rotated to a machining position, the bolt 9 is screwed, and the working procedures of clamping a workpiece and turning the transverse hole are completed. According to the principle, the processing of other transverse holes is completed.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. The valve body turning transverse hole indexing fixture comprises a U-shaped fixture main body, a numerical control chuck, an indexing positioning mechanism and a clamping fixing mechanism; the method is characterized in that:

2. The valve body turning transverse hole indexing fixture according to claim 1, wherein the fixture body is provided with a jack; the numerical control chuck is of a shaft rod-shaped structure; one end of the numerical control chuck is also connected with a shaft shoulder, one side of the shaft shoulder is connected with a plug-in shaft, and the plug-in shaft is in fit plug-in connection with the jack; the shaft shoulder is positioned on the side wall of the clamp main body, and the clamp main body is connected with the shaft shoulder through bolts.

3. The valve body turning transverse hole indexing fixture according to claim 1, wherein the fixture body is provided with a through hole, a nut is fixedly connected in the through hole, and the bolt is in threaded connection with the nut in a matched mode; the other end of the bolt is connected with a square head.

4. The valve body turning transverse hole indexing fixture according to claim 1, wherein a central hole is formed in the indexing base, a central shaft rod is connected to one side of the indexing disc, and the central shaft rod is in fit connection with the central hole.

5. The valve body turning cross hole indexing fixture of claim 1, wherein the clamping table is coaxially arranged with the bolt and the indexing disc.