CN217667612U

CN217667612U - Seamless self-lubricating bearing self-adaptation mould

Info

Publication number: CN217667612U
Application number: CN202220511532.1U
Authority: CN
Inventors: 王伟; 丁士杰; 解国新; 雒建斌
Original assignee: Tsinghua University; Xian University of Architecture and Technology
Current assignee: Tsinghua University; Xian University of Architecture and Technology
Priority date: 2022-03-09
Filing date: 2022-03-09
Publication date: 2022-10-28
Anticipated expiration: 2032-03-09

Abstract

The utility model discloses a self-adaptive mould of a seamless self-lubricating bearing, which comprises an upper gland and a lower die holder which are matched with each other, wherein the upper gland is a cylinder, a through hole is arranged in the middle of the inside of the cylinder, and an arc-shaped cavity with a smooth surface is arranged in the cylinder; the lower die holder is a cylinder, a through hole is formed in the middle of the bottom in the cylinder, a step hole is further reserved below the through hole, a first step hole is formed above the through hole, and a second step hole is formed above the first step hole. The installation process is simple, the automatic guide function is realized, and the bearing outer ring can be forged and pressed simultaneously along the radial direction and the axial direction. The processed seamless self-lubricating bearing has uniform stress in the manufacturing process, small damage to the bearing outer ring and the self-lubricating liner, good consistency of the surface shapes of the bearing inner ring and the outer surface, and improved service life and reliability.

Description

Seamless self-lubricating bearing self-adaptation mould

Technical Field

The utility model belongs to the technical field of self-lubricating bearing makes, a mould is related to, especially a seamless self-lubricating bearing self-adaptation mould.

Background

The self-lubricating bearing is a spherical rolling bearing, consists of an inner ring with an outer spherical surface, an outer ring with an inner spherical surface and a self-lubricating liner adhered to the inner surface of the outer ring, and can be divided into a seamless self-lubricating bearing, a single-slit self-lubricating bearing and a double-slit self-lubricating bearing according to the structure of the outer ring. The self-lubricating bearing has the advantages of compact structure, light weight, impact resistance, long service life and the like, does not need to change oil regularly, has strong bearing capacity, good chemical stability, small friction coefficient, corrosion resistance and the like, and is widely applied to the fields of aerospace, military machinery, biomedical treatment and the like.

In the current manufacturing process of the seamless self-lubricating bearing, a method for extruding and assembling the inner ring into the outer ring is generally adopted, the inner wall of the outer ring and the outer wall of the inner ring are easily damaged in the extruding process by the process method, the bearing clearance is difficult to control, and the self-lubricating liner is extruded and damaged or falls off in the pressurizing process, so that the dimensional precision and the quality of the product cannot meet the quality requirements of precision components in the fields of aerospace, military industry, medical treatment and the like. Therefore, it is one of the hot spots of attention of the applicant to improve the existing manufacturing process of the seamless self-lubricating bearing and design a self-adaptive mold of the seamless self-lubricating bearing so as to meet the manufacturing requirements of the seamless self-lubricating bearing in various fields.

Disclosure of Invention

To the relatively poor technical problem of product size precision and quality that exist among the seamless self-lubricating bearing manufacturing process, the utility model aims to provide a seamless self-lubricating bearing self-adaptation mould installs this seamless self-lubricating bearing self-adaptation mould on forging equipment for processing seamless self-lubricating bearing, reduced the damage to bearing surface and self-lubricating liner in the course of working, improved the surface accuracy and the quality of bearing.

In order to realize the task, the utility model discloses take following technical solution:

a seamless self-lubricating bearing self-adapting die comprises an upper gland and a lower die holder which are matched with each other, and is characterized by also comprising a positioning pin and a gasket; the upper gland is a cylinder, a through hole is formed in the middle in the cylinder, and an arc-shaped cavity with a smooth surface is formed in the cylinder; the lower die holder is a cylinder, a through hole is arranged in the middle of the bottom in the cylinder, a step hole is also reserved below the through hole, a first step hole is arranged above the through hole, and a second step hole is arranged above the first step hole; the locating pin is located first step hole, and the gasket is located the second step hole.

The utility model discloses an other characteristics are:

the lower die holder and the upper gland are made of Cr12MoV, and the hardness requirement of the lower die holder and the upper gland is HRc 45-63 after hardening and tempering.

The upper surface and the lower surface of the lower die base and the upper surface of the upper gland are mutually vertical and parallel, and the deviation of the parallelism is less than or equal to 0.1.

The flatness of the first step hole in the lower die holder and the bottom surface of the lower die holder is 0.03.

The utility model discloses a seamless self-lubricating bearing self-adaptation mould, compared with the prior art, it is to bring beneficial effect:

the manufacturing process of the seamless self-lubricating bearing has little damage to the inner ring, the outer ring and the self-lubricating gasket of the bearing, the outer ring of the bearing is stressed uniformly, the surface shapes of the inner ring and the outer surface of the bearing are consistent well, and the service life and the reliability of the manufactured seamless self-lubricating bearing are improved. Meanwhile, the seamless self-lubricating bearing self-adaptive die is simple in installation process, and can be used for forging and pressing the bearing outer ring along the radial direction and the axial direction.

Drawings

Fig. 1 is a schematic view of an upper gland structure of the seamless self-lubricating bearing self-adaptive mold of the present invention;

fig. 2 is a schematic structural view of a lower die holder of the seamless self-lubricating bearing self-adaptive die of the present invention;

FIG. 3 is a schematic view of the installation of the parts for forging and pressing the seamless self-lubricating bearing by using the self-adaptive die for the seamless self-lubricating bearing of the present invention;

FIG. 4 is a schematic structural view of an outer race part of a seamless self-lubricating bearing;

FIG. 5 is a schematic structural view of an inner race part of a seamless self-lubricating bearing;

fig. 6 is a schematic diagram of a finished product obtained by adopting the self-adaptive die for the seamless self-lubricating bearing of the present invention.

The symbols in the figures represent: 1. the bearing comprises an upper gland, 2, a bearing outer ring, 3, a bearing inner ring, 4, a positioning pin, 5, a gasket, 6, a lower die holder, 7 and a screw.

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

Detailed Description

The following examples are provided to further illustrate the present invention and are not intended to limit the present invention. On the basis of the technical solutions of the present application, those skilled in the art should add or replace the technical solutions to the present application.

The embodiment provides a self-adaptive die for a seamless self-lubricating bearing, which comprises an upper gland 1 and a lower die holder 6 which are matched with each other, and further comprises a positioning pin 4 and a gasket 5; the upper gland 1 is a cylinder, a through hole is formed in the middle inside the cylinder, and an arc-shaped cavity with a smooth surface is formed inside the cylinder; the lower die holder 6 is a cylinder, a through hole is formed in the middle of the bottom in the cylinder, a step hole is further reserved below the through hole, a first step hole is formed above the through hole, and a second step hole is formed above the first step hole. The positioning pin 4 is positioned on the first step hole, and the gasket 5 is positioned on the second step hole.

The specific shape of the upper gland 1 is:

the upper gland 1 is a cylinder with the diameter of 200mm, a through hole with the diameter of 5mm is arranged in the right middle of the cylinder, an arc cavity with a smooth surface is arranged in the cylinder, and the arc cavity is matched with the shape and the size above the bearing outer ring 2 and is attached to the size and the shape above the bearing outer ring 2. The distance between the phi 5mm through hole and the contact point of the arc-shaped cavity is 5mm.

In the upper gland 1, the flatness of the upper surface and the bottom surface is 0.03.

The shape of the lower die holder 6 is as follows:

the lower die holder 6 is a cylinder with the diameter of 220mm, a through hole for placing a screw 7 is arranged in the middle of the bottom in the cylinder, a first step hole for placing the positioning pin 4 is arranged above the through hole, and a second step hole for placing the gasket 5 and the bearing outer ring 2 is arranged above the first step hole for placing the positioning pin 4; a stepped hole for placing the nail head of the screw 7 is reserved below the through hole for placing the screw 7.

In the lower die holder 6, the flatness of the first step hole for placing the positioning pin 4 and the bottom surface is 0.03.

The lower die holder 6 and the upper gland 1 are made of Cr12MoV, and the hardness requirement of the quenched and tempered material is HRc 45-63.

The parts of the seamless self-lubricating bearing comprise a bearing outer ring 2 and a bearing inner ring 3, a structural diagram of the bearing outer ring 2 is shown in figure 4, the height of the bearing outer ring 2 is 40mm, the outer diameter is phi 52mm, the inner diameter of an opening at the upper part is phi 40mm, and a hole with the height of 5mm and the inner diameter of phi 30mm is arranged at the lower part. Fig. 5 shows a structural view of the bearing inner race 3, the height of the bearing inner race 3 is 22mm, the inner diameter is 30mm, and the outer diameter is 40mm, which matches the inner diameter of the bearing outer race 2. And (3) adhering self-lubricating liners to the inner surfaces of the processed bearing inner ring 3 and the bearing outer ring 2.

As shown in fig. 3, by using the seamless self-lubricating bearing self-adapting mold of this embodiment, the positioning pin 4 is installed on the lower die holder 6, and the gasket 5, the bearing outer ring 2 and the bearing inner ring 3 are sequentially sleeved on the positioning pin 4. The outer diameters of the gasket 5 and the bearing outer ring 2 are the same, and the outer diameter of the positioning pin 4 is the same as the inner diameter of the bearing inner ring 3.

The method for processing the seamless self-lubricating bearing on the forging equipment specifically comprises the following steps:

(1) Processing the bearing inner ring 3 and the bearing outer ring 2 according to requirements, and adhering the self-lubricating gasket to the inner surface of the bearing outer ring 2;

(2) Placing the bearing inner ring 3 in the bearing outer ring 2, and tightly attaching the bearing outer ring 2 and the bearing inner ring 3 by adopting a forging method;

(3) And (4) finely turning the redundant part above the pressed bearing outer ring 2 to process the shape and size of the qualified seamless self-lubricating bearing.

The lower die holder 6 is vertical and parallel to the upper and lower surfaces of the upper gland 1, and the deviation of the parallelism is less than or equal to 0.1.

Before forging and pressing, the positioning pin 4 is placed in a first step hole of the lower die holder 6 and fixed by a screw 7; and sequentially sleeving the gasket 5, the bearing outer ring 2 and the bearing inner ring 3 on the positioning pin 4 and locating in the second step hole, and then pressing the upper gland 1 on the bearing outer ring 2. The pressing process of the bearing outer ring 2 and the bearing inner ring 3 of the seamless self-lubricating bearing is controlled by the displacement and the pressure of forging equipment.

In this embodiment, the forging apparatus may be selected from a forging machine or a punch press.

Adopt the seamless self-lubricating bearing self-adaptation mould of this embodiment, when carrying out seamless self-lubricating bearing pressfitting, because the arc cavity of the last gland 1 of seamless self-lubricating bearing self-adaptation mould and the top size of bearing inner race 2, shape suit, consequently have the self-steering effect, the pressfitting in-process need not to carry out accurate location to the mould. In the forging process, the bearing outer ring 2 of the seamless self-lubricating bearing is pressed towards the bearing inner ring 3 until the bearing inner ring 3 is completely wrapped in the bearing outer ring 2.

Fig. 6 is a schematic diagram showing the placement of a product in the process of machining the seamless self-lubricating bearing on the forging equipment by using the self-adaptive die for the seamless self-lubricating bearing of the embodiment, as shown in fig. 6 (a) and 6 (b), wherein fig. 6 (b) is a top view of fig. 6 (a). After the forging pressing is completed, the pressed semi-finished seamless self-lubricating bearing is taken out from the self-adapting die of the seamless self-lubricating bearing, and then the material of the redundant part above the bearing outer ring 2 is subjected to finish turning to process the seamless self-lubricating bearing shown in fig. 6 (c).

Claims

1. A seamless self-lubricating bearing self-adaptive die comprises an upper gland (1) and a lower die holder (6) which are matched with each other, and is characterized by also comprising a positioning pin (4) and a gasket (5); the upper gland (1) is a cylinder, a through hole is formed in the middle in the cylinder, and an arc-shaped cavity with a smooth surface is formed in the cylinder; the lower die holder (6) is a cylinder, a through hole is formed in the middle of the bottom in the cylinder, a step hole is reserved below the through hole, a first step hole is formed above the through hole, and a second step hole is formed above the first step hole; the positioning pin (4) is positioned on the first step hole, and the gasket (5) is positioned on the second step hole.

2. The self-adaptive die for the seamless self-lubricating bearing as claimed in claim 1, wherein the lower die holder (6) and the upper gland (1) are made of Cr12MoV, and the hardness requirement of the quenched and tempered material is HRc 45-63.

3. The self-adaptive die for the seamless self-lubricating bearing as claimed in claim 1, wherein the lower die holder (6) and the upper and lower surfaces of the upper gland (1) are mutually perpendicular and parallel, and the deviation of parallelism is less than or equal to 0.1.

4. The self-adaptive die for the seamless self-lubricating bearing as claimed in claim 1, wherein the flatness of the first stepped hole in the lower die holder (6) and the bottom surface of the lower die holder (6) is 0.03.