CN213135737U

CN213135737U - Convenient tool for guaranteeing coaxiality by cold extrusion of shouldered bushing

Info

Publication number: CN213135737U
Application number: CN202021481150.6U
Authority: CN
Inventors: 林定华; 唐为才; 康佳杰
Original assignee: Eaton Corp And Shanghai Aviation Pipeline Manufacturing Co ltd
Current assignee: Eaton Corp And Shanghai Aviation Pipeline Manufacturing Co ltd; Eaton SAMC Shanghai Aircraft Conveyance System Co Ltd
Priority date: 2020-07-23
Filing date: 2020-07-23
Publication date: 2021-05-07
Anticipated expiration: 2030-07-23

Abstract

Take shoulder bush cold extrusion to guarantee the convenient frock of axiality, depression bar (1), dabber (2), inside lining support sleeve (3) and overcoat stay tube (4) coaxial grafting slidable mounting, depression bar (1), inside lining support sleeve (3) and overcoat stay tube (4) all are cast structure, and dabber (2) are pegged graft in depression bar (1) and inside lining support sleeve (3). By adopting a coaxial combined telescopic insertion structure, the comprehensive functions of supporting, guiding, sliding tracks, centralized accurate transmission of extrusion and the like are realized. Improve assembly work quality, realize swift accurate cold extrusion operation, the bush subassembly of mutually supporting assists the swift accurate higher axiality installation of accomplishing of cold extrusion, realizes accurate positioning, adopts integrated configuration convenient manufacturing, installation and dismantlement, and it is convenient to dock the installation, avoids shouldered bush shoulder clearance, guarantees cold extrusion scarf joint installation power, improves shouldered bush wear resistance, can effectively prolong erection joint's life.

Description

Convenient tool for guaranteeing coaxiality by cold extrusion of shouldered bushing

Technical Field

The utility model relates to a cold extrusion equipment auxiliary fixtures device's institutional advancement technique, especially take shoulder bush cold extrusion to guarantee the convenient frock of axiality.

Background

Cold extrusion is a process in which a metal blank is placed in a cold extrusion die cavity and pressure is applied to the blank by a male die fixed on a press machine at room temperature to plastically deform the metal blank to produce a part. The cold extrusion of the shouldered bush is widely applied to fuel oil and environmental control systems in the manufacturing fields of aviation, aerospace, automobiles and the like.

The cold extrusion operation of the shoulder bush firstly needs to cool the shoulder bush at low temperature to ensure that the outer diameter size of the shoulder bush is shrunk, then the bush is quickly pressed into the joint, and after the temperature of the bush is raised to room temperature, the material expands due to the mode, and then the shoulder bush is fixed on the shaft hole edge of the lug plate of the joint in the interference fit mode.

In the prior art, in order to ensure the coaxiality of installation of the shoulder bush in the cold extrusion process, the auxiliary extrusion tools with different structures are required to be arranged according to the form of the joint, the application effect is not ideal, and further, the assembling quality is influenced due to the defect of the coaxiality of installation of the shoulder bush, and the adverse results of insufficient accuracy of installation and positioning, reduction of the wear resistance of the structure, the service life of the joint and the like are caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a take shoulder bush cold extrusion to guarantee the convenient frock of axiality, improve assembly work quality, realize swift accurate cold extrusion operation, solve above-mentioned technical problem.

The purpose of the utility model is realized by the following technical measures: comprises a pressure lever, a mandrel, a lining support sleeve and an outer sleeve support pipe; the pressure bar, the mandrel, the lining support sleeve and the outer sleeve support tube are coaxially inserted and slidably mounted, the pressure bar, the lining support sleeve and the outer sleeve support tube are all of a tubular structure, and the mandrel is inserted into the pressure bar and the lining support sleeve.

Particularly, the inner diameter of the pressure lever and the inner lining support sleeve is the same as the outer diameter of the mandrel, and the inner diameter of the outer sleeve support tube is the same as the outer diameter of the inner lining support sleeve.

Particularly, the outer diameter of the pressure lever is the same as the mounting hole diameter of the upper lug of the joint.

In particular, the mandrel has an axial hollow interior.

Particularly, the inner diameter of the outer sleeve supporting pipe is not smaller than the mounting aperture of the lower lug.

In particular, the length of the compression bar is not less than the distance between the upper lug and the lower lug of the joint.

The utility model discloses an advantage and effect: the bushing assembly that mutually supports assists the swift accurate higher axiality installation of accomplishing of cold extrusion, realizes the accurate positioning, adopts integrated configuration convenient manufacturing, installation and dismantlement, and the butt joint installation is convenient, avoids shouldered bushing shoulder clearance, guarantees that cold extrusion scarf joint installs the power, improves shouldered bushing wear resistance, can effectively prolong erection joint's life.

Drawings

Fig. 1 is a schematic view of an application structure of embodiment 1 of the present invention.

Fig. 2 is a schematic perspective view of an application structure in embodiment 1 of the present invention.

Fig. 3 is a schematic view of an axial structure of a pressure rod in embodiment 1 of the present invention.

Fig. 4 is a schematic view of an axial structure of a mandrel in embodiment 1 of the present invention.

Fig. 5 is a schematic view of an axial structure of a liner support sleeve in embodiment 1 of the present invention.

Fig. 6 is a schematic view of an axial structure of the outer sleeve supporting tube in embodiment 1 of the present invention.

The reference numerals include:

the device comprises a compression bar 1, a mandrel 2, a lining support sleeve 3, an outer sleeve support pipe 4, a joint 5, a shouldered lining 6, an upper lug 51 and a lower lug 52.

Detailed Description

The utility model discloses the principle lies in, improves 6 installation axialities of shouldered bush, and the reliable installation effect of living needs the supplementary guide structure of rightting of design, moreover, because available space and time are limited among the cold extrusion process, so this type of auxiliary structure self must accord with simple and convenient and dependable performance's requirement, otherwise can take place similar prior art middling pressure and lead to the shoulder to produce the condition that the clearance refused, so the utility model discloses a coaxial combination flexible grafting structure realizes supporting, direction, slip track and concentrates comprehensive functions such as accurate transmission extrusion simultaneously.

The utility model discloses it is especially important in the aerospace shoulder bush cold extrusion of high accuracy.

The utility model discloses a: the pressure bar 1, the mandrel 2, the lining support sleeve 3 and the outer sleeve support tube 4.

The present invention will be further explained with reference to the drawings and examples.

Example 1: as shown in the attached drawings 1 to 6, a pressure lever 1, a mandrel 2, a lining support sleeve 3 and an outer sleeve support tube 4 are coaxially inserted and slidably mounted, the pressure lever 1, the lining support sleeve 3 and the outer sleeve support tube 4 are all in a tubular structure, and the mandrel 2 is inserted into the pressure lever 1 and the lining support sleeve 3.

In the foregoing, the inner diameters of the pressure lever 1 and the lining support sleeve 3 are the same as the outer diameter of the mandrel 2, and the inner diameter of the outer sleeve support tube 4 is the same as the outer diameter of the lining support sleeve 3.

In the above description, the outer diameter of the strut 1 is the same as the mounting hole diameter of the upper tab 51 of the joint 5.

In the foregoing, the mandrel 2 has an axial hollow cavity.

In the foregoing, the inner diameter of the outer jacket support tube 4 is not smaller than the mounting hole diameter of the lower tab 52.

In the above, the length of the pressure bar 1 is not less than the distance between the upper tab 51 and the lower tab 52 of the joint 5.

The embodiment of the utility model provides an in, depression bar 1, dabber 2, inside lining support sleeve 3 and overcoat stay tube 4 are the straight tube structure, and the coaxial through-hole is opened to the well axial region moreover.

The embodiment of the utility model provides an in, depression bar 1, dabber 2, inside lining support sleeve 3 and overcoat stay tube 4 are made by the POM material, effectively reduce or slow down the 6 cold volume of shoulder bush of cooling and scatter and disappear speed, delay shoulder bush 6 and resume normal atmospheric temperature and the time of manifold, make cold extrusion accomplish smoothly under less resistance, also correspondingly alleviate depression bar 1 simultaneously, dabber 2, the damage to the part when auricle 51 and auricle 52 down in inside lining support sleeve 3 and the contact of overcoat stay tube 4, can effectively protect the component surface and then improve the life of component.

The embodiment of the utility model provides an in, at first need make its external diameter size shrink through the bush subcooling, then in impressing the bush joint fast, need guarantee the axiality this moment, otherwise can press the deviation to lead to the shoulder to produce the clearance and reject, and the bush temperature risees to the room temperature after, and the material inflation then can be fixed on the joint with interference fit's form, need be equipped with not the extrusion auxiliary fixtures of isostructure according to the form of joint.

In the embodiment of the utility model, when the utility model is used, the upper ear piece 51 and the lower ear piece 52 of the joint 5 are firstly arranged in the jaw of the parallel jaw vice, the pressure bar 1 corresponding to the installation hole specification of the upper ear piece 51 and the lower ear piece 52, the mandrel 2, the lining support sleeve 3 and the outer sleeve support tube 4 are prepared, taking the example that the shouldered bush 6 is pre-arranged in the inner edge of the installation hole of the lower ear piece 52 as an example, the pressure bar 1 is passed through the installation hole of the upper ear piece 51, the outer end of the pressure bar 1 is tightly pressed against the side, namely the movable jaw of the parallel jaw vice, the inner end of the pressure bar 1 is arranged between the upper ear piece 51 and the lower ear piece 52, one end of the mandrel 2 is inserted into the central shaft hole from the inner end of the pressure bar 1, the length of the other end of the mandrel 2 exposed out of the inner end of the pressure bar 1 is not less than the axial length of the sho, the outer end of the outer sleeve supporting tube 4 is tightly propped against the side, namely the fixed jaw of the parallel jaw vice, and the inner end of the outer sleeve supporting tube 4 is tightly propped against the outer end face edge of the mounting hole of the lower lug piece 52. Then, after the shoulder bush 6 to be installed is cooled to a set temperature and contracted, the shoulder bush is quickly sleeved at the exposed part at the other end of the mandrel 2, the inner end surface of the pressure rod 1 is abutted against the shoulder end surface of the shoulder bush 6, the other end of the mandrel 2 is pulled out and inserted into the lining support sleeve 3, then the movable jaw of the parallel jaw vice is operated at a constant speed to extrude the outer end of the pressure rod 1, the extrusion action is axially transmitted along the central axes of the pressure rod 1 and the mandrel 2, meanwhile, under the high-precision coaxial sliding fit of the pressure rod 1, the mandrel 2, the lining support sleeve 3 and the outer sleeve support tube 4, the inner end surface of the pressure rod 1 is abutted against the shoulder end surface of the shoulder bush 6, so that the other end of the shoulder bush 6 is extruded into the mounting hole of the lower lug piece 52, in the process, the mandrel 2 completes the function of a sliding guide rail, the outer sleeve support tube 4 plays, and does not damage the lower ear 52. After the work is finished, the pressure lever 1, the mandrel 2, the lining support sleeve 3, the outer sleeve support pipe 4 and the joint 5 are easily dismounted without damage by releasing the parallel jaw vice.

Claims

1. The convenient tool for guaranteeing coaxiality by cold extrusion of the shouldered bushing comprises a pressure lever (1), a mandrel (2), a lining support sleeve (3) and an outer sleeve support tube (4); the novel pressure-bearing pipe is characterized in that a pressure rod (1), a mandrel (2), a lining support sleeve (3) and an outer sleeve support pipe (4) are coaxially inserted and slidably mounted, the pressure rod (1), the lining support sleeve (3) and the outer sleeve support pipe (4) are all of a pipe type structure, and the mandrel (2) is inserted into the pressure rod (1) and the lining support sleeve (3).

2. The frock for ensuring coaxiality convenience in cold extrusion of the shouldered bushing according to claim 1, wherein the inner diameters of the pressure rod (1) and the lining support sleeve (3) are the same as the outer diameter of the mandrel (2), and the inner diameter of the outer sleeve support tube (4) is the same as the outer diameter of the lining support sleeve (3).

3. The frock for ensuring convenient coaxiality through cold extrusion of the shouldered bush according to claim 1, wherein the outer diameter of the compression rod (1) is the same as the mounting hole diameter of the upper lug (51) of the joint (5).

4. The tooling for ensuring the convenient coaxiality of the shouldered bush in the cold extrusion manner of claim 1, wherein the mandrel (2) is provided with an axial hollow inner cavity.

5. The frock for ensuring coaxiality convenience in cold extrusion of the shouldered bushing according to claim 1, wherein the inner diameter of the outer sleeve supporting tube (4) is not smaller than the installation hole diameter of the lower lug piece (52).

6. The frock for ensuring coaxiality convenient and fast in cold extrusion of the shouldered bush according to claim 1, wherein the length of the compression rod (1) is not less than the distance between an upper lug (51) and a lower lug (52) of the joint (5).