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Wear resistant ceramic cam ring and preparation method thereof

A cam ring and wear-resistant technology, applied in the field of wear-resistant ceramic cam ring and its preparation, can solve the problems of long production cycle of hot die casting, low forming dimensional accuracy, many manual operations, etc., so as to improve labor efficiency and improve The effect of service life and cost reduction

Inactive Publication Date: 2015-12-16
HEFEI HUIZHI NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although ceramic dry pressing has high efficiency, there are differences in density and uneven microstructure in the formed products, and it is not easy to form complex shapes and special-shaped products; cold isostatic pressing can obtain high-density and high-uniformity forming blanks , but it is difficult to form ceramic parts with complex shapes, and the forming efficiency is low and manual operations are many
Although ceramic slip-casting can form special-shaped products and reach near-net size, the molded body is prone to problems such as uneven density and composition segregation, low molding dimensional accuracy and reduced product reliability, and the molding is manual operation and the drying efficiency of the green body Low
The biggest problem with hot die casting is the long production cycle and low efficiency. It takes dozens or even hundreds of hours to remove organic binders such as paraffin wax, and defects such as pores and cracks are prone to occur during the wax removal process.

Method used

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  • Wear resistant ceramic cam ring and preparation method thereof
  • Wear resistant ceramic cam ring and preparation method thereof
  • Wear resistant ceramic cam ring and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Such as figure 1 A wear-resistant ceramic cam ring is shown, whose raw material is alumina ceramics with an alumina content of 85%. The ceramic cam ring includes a cam ring body (1), and the cam ring body (1) is There are three protruding points (2) at equal intervals, and the three protruding points (2) correspond to three grooves (3) on the other side of the cam ring body (1), and the three grooves (3) pass through A ring-shaped groove (4) is connected, and the preparation steps of the wear-resistant ceramic cam ring are as follows:

[0022] 1) Feed material: Mix ceramic powder and polymethyl methacrylate (PMMA) + polyethylene oxide (PEO) composite binder system at a ratio of 88wt%: 12wt% to form powder injection molding feed;

[0023] 2) Injection molding: the injection molding mixture is installed on the injection molding machine with a screw abrasive tool and injected to obtain a green body. The injection temperature is between 175°C, and the molded body is obtain...

Embodiment 2

[0027] Such as figure 1 Shown is a wear-resistant ceramic cam ring whose raw material is zirconia ceramics with a zirconia content of 90%. The ceramic cam ring includes a cam ring body (1), and the cam ring body (1) is superior to There are three convex points (2) at intervals, and the three convex points (2) correspond to three grooves (3) on the other side of the cam ring body (1), and the three grooves (3) pass through a The annular grooves (4) are connected, and the preparation steps of the wear-resistant ceramic cam ring are as follows:

[0028] 1) Feed: Mix ceramic powder and polymethyl methacrylate (PMMA) + polyethylene oxide (PEO) composite binder system at a ratio of 92wt%: 8wt% to form a powder injection molding feed;

[0029] 2) Injection molding: The injection molding mixture is installed on the injection molding machine with a screw abrasive tool and injected to obtain a green body. The injection temperature is between 180°C, and the molded body is obtained withi...

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Abstract

The invention discloses a wear resistant ceramic cam ring, raw materials of which comprises alumina ceramic with the content of alumina being 75-100% and zirconia ceramic with the content of zirconia being 75-100%. The ceramic cam ring comprises a cam ring body; three bumps with equal interval are arranged on one side of the cam ring body; and three grooves, corresponding to the three bumps, are formed in the other side of the cam ring body, and communicate with one another through an annular groove. The service life of the cam ring is prolonged due to high wear resistance of ceramic; the cost is reduced; and the labor efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of high-performance ceramic preparation, in particular to a wear-resistant ceramic cam ring and a preparation method thereof. Background technique [0002] An electric screwdriver usually rotates a screwdriver head driven by a motor, and a power transmission row is set between the motor and the screwdriver head to transmit the rotational driving force of the motor. In the power transmission row, when a certain level of load torque is applied to the screwdriver head, there is a power transmission blocking device that will be in the power transmission row. A sphere in contact with the end surface of the cam ring in the axial direction, a compression spring extending in the axial direction and exerting a contact pressure between the sphere and the disc-shaped cam ring, and adjusting the compression spring in the axial direction On the adjustment part of the degree of compression. Commonly used cam rings are p...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/48C04B35/622
Inventor 冉申谢松王嵩刘芸
Owner HEFEI HUIZHI NEW MATERIAL TECH CO LTD
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