CN105697720A

CN105697720A - Wear-resisting gear with multi-material combined tooth face

Info

Publication number: CN105697720A
Application number: CN201610259986.3A
Authority: CN
Inventors: 陈奇; 徐帆; 樊浩; 张振; 高峰
Original assignee: Hefei University of Technology
Current assignee: Hefei University of Technology
Priority date: 2016-04-21
Filing date: 2016-04-21
Publication date: 2016-06-22

Abstract

The invention relates to a wear-resisting gear with a multi-material combined tooth face. About 15 to 20 round ceramic element bodies are embedded on the tooth face and are uniformly distributed; a projection area of the round element bodies on the tooth face accounts for 30% to 40% of the total area of the tooth face; a thickness of each round element body is approximately one tenth of a tooth thickness. According to the invention, performance characteristics of various materials are comprehensively applied; a ceramic material is embedded on a gear matrix made of a metal material; compared with the prior art, the wear-resisting gear has the advantages that wear resistance of the wear-resisting gear can be effectively improved, and the service life of the wear-resisting gear is greatly prolonged.

Description

A kind of wear-resistant gear with many combinations of materials flank of tooth

Technical field

The present invention relates to mechanical transmission fields, particularly relate to a kind of wear-resistant gear with many combinations of materials flank of tooth。

Background technology

Gear drive is the topmost form in machine driving, there is irreplaceable critical role, along with improving constantly of industrial level, gear drive requirement is also increasingly harsher, in order to meet the requirement of High-performance gear bearing capacity, need to adopt and reduce gear unit stress and improve gear teeth strength per unit area (hardness) two kinds of approach and improve bearing capacity and the reliability of gears, wherein reduce the means of gear unit stress and increase the volume and weight of gear by increasing the modulus of gear, increase gear thickness；Adopt traditional surface heat-treatment process often to bring bigger deformation while improving tooth face hardness, or because alloying layer thickness and hardness are not sufficient to ensure that gear bearing requirements causes that gear occurs that the flank of tooth lost efficacy under high speed, fully loaded transportation condition。Therefore, by development of new gear material or adopt process for modifying surface, reduce gear friction and wear, for improve gear bearing capacity, extend gear life-span, improve gear-driven efficiency significant。

The class Inorganic Non-metallic Materials that ceramic material is made through shaping and high temperature sintering with naturally occurring or synthetic compound。It has the advantages such as high-melting-point, high rigidity, high-wearing feature, resistance to oxidation。Substantial amounts of research shows that ceramic material itself is heat-resisting, the galling of coupling is little, replaces metal material can improve the life-span of friction pair as wear part with ceramic material。

But there is poor toughness in simple pottery, poor fatigue properties, fragility is high, being difficult to the shortcomings such as deformation and machining makes it be unable to undergo collision and impact, brittle fracture is very easily formed under bigger action of pulling stress, it is dfficult to apply to mechanical part bears the part of complex load particularly shock loading, in order to improve the toughness of ceramic material, pass through transformation toughening, the means such as microcrack evolution equation improve the obdurability of pottery, but the ceramics toughness after toughness reinforcing process is also only the 1/10 of ferrous materials, or there is bigger deficiency, limit pottery and bear friction, the complex load effects such as impact and the important application on mechanical transmission part。

Summary of the invention

For above-mentioned the deficiencies in the prior art, the present invention is based on the Performance Characteristics of various types of materials, by the analysis of corresponding software, designs a kind of wear-resistant gear with many combinations of materials flank of tooth, solves, with this, the gear wear problem be correlated with。

The present invention solves that technical problem adopts the following technical scheme that

A kind of wear-resistant gear with many combinations of materials flank of tooth mentioned by the present invention, its feature is: described wear-resistant gear is made up of gear matrix and circular cell body；Described gear matrix is metal material, is inlaid with the circular cell body of ceramic material on its flank of tooth, and in being evenly arranged。

A kind of wear-resistant gear with many combinations of materials flank of tooth that the present invention mentions, its construction features lies also in: described circular cell body, its number about 16～20, and in being evenly arranged；Described circular cell body projected area on the flank of tooth accounts for the 30%～40% of the flank of tooth gross area, the 1/10 of thickness substantially transverse tooth thickness。

Compared with the prior art, the present invention has the beneficial effect that:

Ceramic material is embedded on gear matrix by the present invention with the form of described circular cell body, make use of the shock proof characteristic of metal material, in combination with the performance of ceramic anti-wear。In the engagement process of gear, although have impact, but suffered impact is undertaken by metal material and the ceramic material of the flank of tooth, can guarantee that brittle fracture does not occur ceramic material in gear drive process, continues to play its good anti-wear performance simultaneously；And in the wear process of gear, its tooth surface abrasion is also by the metal of the flank of tooth, ceramic material shared, therefore the feature that ceramic material wearability is good can be played。Therefore, described wear-resistant gear not only has good shock resistance, and has good antiwear characteristic。

Accompanying drawing explanation

Fig. 1 is the schematic diagram of the present invention；

Fig. 2 is the flank of tooth schematic diagram of the present invention；

Fig. 3 is the physical dimension figure of described circular cell body；

Detailed description of the invention

Referring to Fig. 1, described gear matrix 1 is mainly made up of the good metal material of shock resistance, meanwhile, is inlaid with the circular cell body 2 that ceramic material is made on the flank of tooth of its metal material；The gear of this experiment test, metal material chooses 38CrMoAlA, modifier treatment, and hardness is 230HB, 7 class precisions；The material selection silicon nitride ceramics of described circular cell body 2。

Impulsive force in Meshing Process of Spur Gear is undertaken by metal material 38CrMoAlA and the silicon nitride ceramics of the flank of tooth simultaneously, can guarantee that brittle fracture does not occur silicon nitride ceramics in gear drive process, continues to play its good anti-wear performance；And in the wear process of gear, its loss is also by the metal material 38CrMoAlA of the flank of tooth, silicon nitride ceramics shared, therefore the feature that ceramic material wearability is good can be played。Therefore, described wear-resistant gear not only has good shock resistance, and has good antiwear characteristic。

Referring to Fig. 1 and Fig. 3, described circular cell body 2, its number about 16～20, and in being evenly arranged；Described circular cell body 2 projected area on the flank of tooth accounts for the 30%～40% of the flank of tooth gross area, in Fig. 3, and S₁For described circular cell body 2 thickness, S is transverse tooth thickness, the 1/10 of described circular cell body 2 thickness substantially transverse tooth thickness。

UG is utilized to carry out design and the drafting of flank of tooth pattern, then utilize ANSYS software that described wear-resistant gear carries out loading and the analysis of stress, analyze its fatigue behaviour, instantaneous frequency responds, result shows, described wear-resistant gear is taken turns less than normal light slip teeth at y-axis direction deformation quantity, and fatigue stress scope is less than smooth gear。Therefore described wear-resistant gear is in running, vibration and noise are little compared with normal light slip teeth wheel, and operation conditions is also more steady, advantageously reduce the rippling caused by deformation of gear tooth, tired broken teeth equivalent damage, effectively improve the dynamic performance of gear。

Claims

1. a wear-resistant gear with many combinations of materials flank of tooth, it is characterised in that described wear-resistant gear is made up of gear matrix (1) and circular cell body (2)；Described gear matrix (1) is metal material, is inlaid with the circular cell body (2) of ceramic material on its flank of tooth, and in being evenly arranged。

2. a kind of wear-resistant gear with many combinations of materials flank of tooth according to claim 1, it is characterised in that described circular cell body (2), its number about 16～20, and in being evenly arranged；Described circular cell body (2) projected area on the flank of tooth accounts for the 30%～40% of the flank of tooth gross area, the 1/10 of thickness substantially transverse tooth thickness。