Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A gear bushing

A gear bushing and water vapor technology, which is applied in the direction of shafts and bearings, bearing components, mechanical equipment, etc., can solve the problem of poor strength and wear resistance of gear bushings, unfavorable high-strength operating equipment, and unfavorable large-scale industrial production, etc. problems, to achieve the effect of preventing the alloy from becoming brittle, reducing production costs, and improving density and hardness

Active Publication Date: 2019-07-26
宁波金钟粉末冶金有限公司
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the strength and wear resistance of the gear sleeves that can generally be cold-pressed at present are not good, which is not conducive to being used in high-intensity operating equipment such as automobile engines and transmissions.
Chinese patent application (publication number: CN106111976A) discloses a raw material including water atomized iron powder, copper powder, molybdenum powder, vanadium powder, nickel powder, yttrium powder, aluminum powder, magnesium powder, cobalt powder, lead powder, steel slag powder , iron slag powder, ferroalloy slag powder, modified tree ash powder, graphite powder, amino resin, polyether modified silicone oil, hydroxypropyl methylcellulose, zinc stearate, polyethylene glycol, ethylene dihard Fatty acid amide, stearic acid, carbon fiber, glass fiber, boron nitride, glycidoxypropyltrimethoxysilane, silicon dioxide, manganese sulfide, acrylate, inhibitor, binder, strengthening agent, Cutting agent, lubricant, coupling agent, dispersant powder metallurgy gear, although the wear resistance and strength of the product have been improved, but the material composition is too complex, which is not conducive to large-scale industrial production

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A gear bushing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Mixing: Add the gear bushing material to the mixer according to Table 1, and stir to obtain the powder mixture; the gear bushing material includes the following constituent elements and their weight percentages: C: 0.6%, Cu: 1.3%, Ni: 1.55%, Ce: 0.03%, Mo: 0.4%, Mn: 0.05%, stearic acid: 0.8%, and the rest is iron.

[0031] Pressing: Put the powder mixture into a preset product mold and press it into a green part under a pressure of 500MPa;

[0032] Sintering: Put the green part into a mesh belt sintering furnace, fill it with hydrogen and nitrogen at a volume ratio of 2:1, and sinter it at 1100°C for 3 hours;

[0033] Secondary pressing: After coating a layer of protective agent on the surface of the green blank after sintering, the pressing step is repeated, and the temperature is increased during the pressing process, and a semi-finished blank is obtained after holding at 800°C for 30 minutes; the protective agent includes the following weights Component parts: fluorine oil...

Embodiment 2

[0037] Mixing: Add the gear bushing material to the mixer and stir to obtain the powder mixture; the gear bushing material includes the following constituent elements and their weight percentages: C: 0.7%, Cu: 1.5%, Ni: 1.7 %, Ce: 0.04%, Mo: 0.5%, Mn: 0.1%, stearic acid: 1%, and the rest is iron.

[0038] Pressing: Put the powder mixture into a preset product mold and press it into a green part under a pressure of 530MPa;

[0039] Sintering: Put the green part into a mesh belt sintering furnace, fill it with hydrogen and nitrogen at a volume ratio of 2.5:1, and sinter it at 1120°C for 3.4 hours;

[0040] Secondary pressing: After coating a layer of protective agent on the surface of the green body after sintering, the pressing step is repeated, and the temperature is increased during the pressing process, and the semi-finished blank is obtained after holding at 830°C for 40 minutes; the protective agent includes the following weights Component parts: fluorine oil: 40 parts, hydroxyp...

Embodiment 3

[0044] Mixing: Add the gear bushing material to the mixer and stir evenly to obtain the powder mixture; the gear bushing material includes the following constituent elements and their weight percentages: C: 0.8%, Cu: 1.6%, Ni: 1.85 %, Ce: 0.05%, Mo: 0.55%, Mn: 0.2%, stearic acid: 1.2%, and the rest is iron.

[0045] Pressing: Put the powder mixture into a preset product mold and press it into a green part under a pressure of 500MPa;

[0046] Sintering: Put the green part into a mesh belt sintering furnace, fill it with hydrogen and nitrogen at a volume ratio of 2.5:1, and sinter it at 1180℃ for 3.8 hours;

[0047] Secondary pressing: After coating a layer of protective agent on the surface of the green blank after sintering, the pressing step is repeated, and the temperature is increased during the pressing, and a semi-finished blank is obtained after holding at 880°C for 50 minutes; the protective agent includes the following weights Component parts: fluorine oil: 45 parts, hydroxy...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a shaft sleeve, in particular to a gear shaft sleeve and belongs to the technical field of powder metallurgy. The gear shaft sleeve contains the following materials of, by weight, 0.6-0.9% of C, 1.3-1.7% of Cu, 1.55-1.95% of Ni, 0.03-0.05% of Ce, 0.4-0.6% of Mo, 0.05-0.30% of Mn, 0.8-1.4% of stearic acid and the balance iron. According to the gear shaft sleeve, the compatibility of the materials is reasonable, secondary pressing is added on the basis of primary pressing and primary sintering of traditional powder metallurgy, the defects that too many pores are generated after a green body is sintered and the structure is loose are overcome, and the product hardness and density after powder metallurgy is finished are substantially improved; and before secondary pressing, the surface of the green body is coated with a protective agent which can fill in the pores of the surface of the green body, then the temperature is increased, the protective agent is diffusedinto the green body, therefore the sintered compact gear shaft sleeve is obtained, and the density and the hardness of the gear shaft sleeve are improved.

Description

Technical field [0001] The invention relates to a shaft sleeve, in particular to a gear shaft sleeve, belonging to the technical field of powder metallurgy. [0002] technical background [0003] Gears are an important part in mechanical design. Bushes are usually sleeved on the gear shaft to protect the gear shaft. The gear shaft sleeve has both functions, including a gear part and a shaft sleeve part. Powder metallurgy is a commonly used method for processing gear sleeves. This method not only has a short process chain, but also has less mechanical processing, which greatly saves metal materials and reduces costs. However, the strength and wear resistance of gear bushings that can be generally cold-pressed are not good for use in high-strength operation equipment such as automobile engines and transmissions. Chinese patent application (publication number: CN106111976A) discloses a raw material including water atomized iron powder, copper powder, molybdenum powder, vanadium powde...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B22F5/08B22F3/16C22C38/04C22C38/08C22C38/12C22C38/16F16C33/04
Inventor 蔡健翰张小芬
Owner 宁波金钟粉末冶金有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com