Pneumatic compression and curing method for self-lubricating bushing

A pressurized curing and self-lubricating technology, applied in the direction of bearing components, shafts and bearings, mechanical equipment, etc., can solve the problems that the curing mandrel cannot monitor the curing pressure, the processing accuracy and surface roughness are difficult to control, and the machining characteristics are poor.

Active Publication Date: 2015-04-08
FUJIAN LONGXI BEARING (GROUP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] 1. The curing pressure cannot be monitored by using the curing mandrel. The curing pressure is calculated by calculating the expansion of the material and converted into the interference between the mandrel and the bushing, so as to estimate the pressure
[0006] 2. At present, the raw material of the mandrel on the market is impure, it is difficult to achieve isotropic linear expansion coefficient, and the machining characteristics are poor, and the machining accurac

Method used

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Examples

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specific Embodiment

[0024] A bushing matrix with an inner hole of 30 mm and a width of 20 mm is used, and a high-temperature curing thermosetting resin is used to paste the PTFE fabric self-lubricating liner on the outer periphery, and then the PTFE fabric self-lubricating liner with a high-temperature curing thermosetting resin is pasted The gasket fits into the bushing matrix. High temperature curing The curing temperature required for curing thermosetting resins is 160 degrees, and the curing pressure is 0.1 MPa.

[0025] The air bag is made by the above-mentioned manufacturing method. The thickness of the finished air bag is 0.03 mm, and the size of the inflated air bag is: an inner diameter of 30 mm and a length of 100 mm. The inflated airbag can cure four liners, ie the airbag can be passed through four liners arranged side by side.

[0026] When the normal temperature is 25 degrees, the pressure F1 required for the self-lubricating liner at this temperature T1 can be calculated according ...

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Abstract

The invention discloses a pneumatic compression and curing method for a self-lubricating bushing. The self-lubricating bushing comprises a bushing substrate and a PTFE fabric self-lubricating liner. A high temperature-resisting air bag which is cylindrical after air inflation is sleeved with the PTFE fabric self-lubricating liner, pneumatic compression is carried out on the air bag under room temperature via an inflator with a pressure meter; pressure in the air bag applies a force to the PTFE fabric self-lubricating liner until the pressure value on the pressure meter is the corrected value F1 of cured pressure and then air inflation is stopped and the air bag is sealed; the self-lubricating bushing with the air bag is put in an oven whose temperature is the room temperature T1; the oven is started to enable temperature inside the oven to reach the temperature T2 needed by curing of the PTFE fabric self-lubricating liner, the temperature T2 is kept for a period of time, and pressure suffered by the PTFE fabric self-lubricating liner is the cured pressure F2. The curing method has the advantages of greatly ensuring accuracy of cured pressure and reducing curing cost.

Description

technical field [0001] The invention relates to an inflation and pressure curing method for a self-lubricating bush. Background technique [0002] Self-lubricating bushing is a mechanical part with simple structure. The inner hole of self-lubricating bushing is pasted with high-performance PTFE fabric self-lubricating liner. It has the characteristics of maintenance-free, high wear resistance and friction reduction, and is widely used in aviation parts. . [0003] PTFE fabric self-lubricating gaskets generally use high-temperature curing thermosetting resins. Resin curing requires not only heating but also pressure. Different resins have different requirements for curing parameters. Generally, the curing temperature is above 160°C and the curing pressure is above 0.1MPa. How to control the pressure during curing is the key to whether the anti-friction and wear resistance properties of the self-lubricating liner can be fully exerted. At present, the method of curing and pre...

Claims

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Application Information

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IPC IPC(8): F16C43/02F16C33/14
Inventor 王兆昌庄彩虹汤靖宇杨茂藻卢鹏朱汉城
Owner FUJIAN LONGXI BEARING (GROUP) CO LTD
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