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Method for manufacturing starting ratchet wheel of motorcycle

A manufacturing method and motorcycle technology, which are applied in the manufacturing field of motorcycle starting ratchets, can solve the problems of waste of steel material resources, large machining allowance, unsatisfactory effect, etc. The effect of less quantity and ensuring product quality and stability

Active Publication Date: 2013-04-24
重庆聚能粉末冶金股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] But above-mentioned traditional technology has the defective to the manufacturing method of motorcycle starting ratchet and is: machining allowance is big, causes the waste of steel material resource; Processing procedure process is many, and processing period is long, causes the waste of energy and human resource; The appearance surface quality is poor, Poor dimensional accuracy consistency; milling end face ratchet and drawing inner hole spline production efficiency is low, tool wear is fast, quality is unstable, tool consumption is large, steel consumption is large, and cost is high
Various institutions also tried to use other methods to improve production efficiency and reduce costs, but the results were not satisfactory, and even the produced starting ratchets could not meet the basic requirements for use.

Method used

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  • Method for manufacturing starting ratchet wheel of motorcycle
  • Method for manufacturing starting ratchet wheel of motorcycle
  • Method for manufacturing starting ratchet wheel of motorcycle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] see figure 1 , figure 2 : A mold for manufacturing a motorcycle CG125 starting ratchet, including a cylindrical female mold 6 with a boss on the outer surface, an upper punch 3, a lower punch 7, a lower second punch 10, a lower third punch 13 and a mandrel 4 , the next punch 7 and the second punch 10 penetrate into the cavity of the female mold 6, the third punch 13 penetrates the second punch 10, and the mandrel 4 penetrates the upper punch 3 and the lower three punches 13, the female mold 6 is provided with a cavity in the circumferential shape of the motorcycle CG125 starting ratchet that runs through the axis, and the lower three punches 13 are sleeved in the lower two punches 10. The third punch 13 is socketed with the mandrel 4, and the cavity wall of the circumferential shape of the ratchet wheel, the bottom of the upper punch 3, the next punch 7, the lower second punch 10 and the lower three are started by pressing the motorcycle CG125 of the female mold 6. T...

Embodiment 2

[0038] A method for manufacturing a motorcycle starting ratchet. Metal powder is used as a raw material. The metal powder is selected from two or more of iron powder, copper powder, nickel powder and molybdenum powder, and graphite powder is added. The graphite powder is powder metallurgy Graphite powder is mixed with a lubricant, filled into a mold, pressed and sintered.

[0039] Before compression molding, each metal powder, graphite powder and lubricant are mixed in a mixing device. The mixing equipment is a conical mixer, a V-shaped mixer or a three-dimensional mixer, and the mixing time is 50 minutes.

[0040] Pressing adopts hydraulic press or mechanical press, and the process conditions are pressing pressure: 98 tons; pressing product density: 7.0g / cm 3 . The demoulding protection pressure after pressing is 12 tons.

[0041] The sintering adopts a mesh belt furnace or a boat pusher furnace. The sintering atmosphere is nitrogen-hydrogen mixed gas. The process conditio...

Embodiment 3

[0043] A kind of manufacturing method of motorcycle starting ratchet, referring to embodiment 3, differs from embodiment 2 in that the mixing time is 30 minutes; the pressing process condition is a pressing pressure of 80 tons; the pressing product density is 6.67g / cm 3 . The demoulding protection pressure is 9 tons.

[0044] The sintering process conditions are as follows: the sintering temperature is 1000° C.; the sintering time is 3 hours.

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Abstract

Provided is a method for manufacturing a starting ratchet wheel of a motorcycle. Metal powder serves as a raw material and is sintered after compression forming in a mould. The method is characterized in that pressure for compression is 80-115 tons, and dwell pressure for demoulding is 9-15 tons. The metal powder serves as the raw material, is alloyed into alloy steel by compressing and sintering, and is completely free of mechanical cutting, and accordingly waste of steel materials is avoided, steel resource is greatly saved, and the produced starting ratchet wheel of the motorcycle has mechanical performance of the alloy steel, the mechanical performance and overall quality of the starting ratchet wheel are further improved, and production efficiency is also greatly increased. The method is simple in production process, the starting ratchet wheel is high in precision and fine in consistency, and stability of quality of products in mass production is guaranteed.

Description

technical field [0001] The invention relates to a manufacturing method of a motorcycle starting ratchet. Background technique [0002] The current traditional technical method is that for the manufacture of motorcycle starting ratchets, steel is used as raw material forging and then mechanically processed. The specific steps are: 20CrMo or 20CrMnTi round steel is used as raw material, followed by: 1. Cutting - 2. Forging (die forging) - 3. Normalizing (stress relief) - 4. Surface treatment (descale) - 5. Turning (turning one end face, inner hole) - 6. Turning (turning the other end face, steps) -7. Milling (milling inclined plane) -8. Broaching (pull inner hole spline) -9. Drilling (drilling dots) -10. Milling (milling end face ratchet) -11. Heat treatment (carburizing and quenching Fire) - 12. Surface treatment (removal of scale) and more than ten processes. [0003] But above-mentioned traditional technology has the defective to the manufacturing method of motorcycle sta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F5/08B22F3/16
Inventor 雷啸春黄忠荣骆大国聂勋伦刘志军
Owner 重庆聚能粉末冶金股份有限公司
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