Camshaft manufacturing method and camshaft

A production method and camshaft technology, which are applied in valve details, mechanical equipment, valve devices, etc., can solve the problems affecting the overall strength and reliability of the assembled camshaft, low assembly efficiency, and low qualified rate of finished products, and achieve product quality. Lighten, reduce cycle time, create simple effects

Active Publication Date: 2018-05-18
绍兴春晖精密机电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The material of the mandrel is generally made of seamless cold-drawn steel pipe. When the cam plate made of high-carbon steel is welded or assembled by mechanical pipe expansion, defects such as thermal cracks and cracks are prone to occur, which seriously affects the overall strength and reliability of the assembled camshaft. Reliability, there are defects such as low assembly efficiency and low qualified rate of finished products

Method used

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  • Camshaft manufacturing method and camshaft
  • Camshaft manufacturing method and camshaft
  • Camshaft manufacturing method and camshaft

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Please refer to image 3 and Figure 4 , a preparation method of an overhead camshaft 7, comprising the steps of:

[0046] 1. Prepare the material for the inner layer 11. The inner layer is composed of the following components: 1 part of C, 1999 parts of Fe; the particle size of the material is 0.1 μm, and the material is mixed through a mixing equipment, and the precisely weighed mixed material is poured Put it into a special mold for leveling;

[0047] 2. Under the pressure of 500MPa, the inner layer 11 material is pressed into the inner layer blank corresponding to the shape of the cam piece, that is, the inner ring blank;

[0048] 3. Vacuum sinter the inner blank in a vacuum furnace. The sintering temperature in the sintering furnace is 800°C for 30 minutes. After cooling in the vacuum furnace, the inner blank is sintered and formed;

[0049] 4. Prepare the outer layer 12 materials. The outer layer is composed of the following components: 2 parts of C, 198 parts ...

Embodiment 2

[0066] Please refer to Figure 3 to Figure 4 , a preparation method of an overhead camshaft 7: comprising the steps of:

[0067] 1, prepare above-mentioned inner layer 11 materials, described inner layer is made up of following components: 5 parts of C, 20 parts of Cu, 10 parts of Mo, 50 parts of Cr, 10 parts of Ni, 5 parts of Si, 1700 parts of Fe, the material The particle size is 200μm, and the mixture is mixed through the mixing equipment, and the precisely weighed mixture is poured into a special mold for leveling;

[0068] 2. Under the pressure of 1200MPa, the inner layer 11 material is pressed into the inner layer blank corresponding to the shape of the cam piece, that is, the inner ring blank;

[0069] 3. Vacuum sinter the inner layer blank in a vacuum furnace. The sintering temperature in the sintering furnace is 1250°C for 120 minutes. After cooling in the vacuum furnace, the inner layer blank is sintered and formed;

[0070] 4. Prepare the above-mentioned outer lay...

Embodiment 3

[0087] Please refer to image 3 and Figure 4 , a preparation method of an overhead camshaft 7: comprising the steps of:

[0088] 1. Prepare the above 11 inner layer materials, 8 parts of C, 50 parts of Cu, 19 parts of Mo, 70 parts of Cr, 20 parts of Ni, 4 parts of Si, 1750 parts of Fe; Mixing, pour the precisely weighed mixture into a special mold for leveling;

[0089] 2. Under the pressure of 850MPa, the inner layer material is pressed into the inner layer blank corresponding to the shape of the cam piece, that is, the inner ring blank;

[0090] 3. Vacuum sinter the inner layer blank in a vacuum furnace. The sintering temperature in the sintering furnace is 1000°C for 100 minutes. After cooling in the vacuum furnace, the inner layer blank is sintered and formed;

[0091] 4. Prepare the above-mentioned outer layer 12 materials, the outer layer is composed of the following components: 4 parts of C, 2 parts of Cu, 1.6 parts of Mo, 10 parts of Cr, 2 parts of Ni, 0.7 parts of...

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Abstract

The invention discloses a camshaft manufacturing method and a camshaft. The camshaft manufacturing method comprises the step of preparing an inner layer material, and the inner layer material comprises, by weight, 1-13 parts of C, 0-80 parts of Cu, 0-30 parts of Mo, 0-200 parts of Cr, 0-50 parts of Ni, 0-10 parts of Si and 1617-1999 parts of Fe; and the particle size of the inner layer material is 0.1-200 [mu]m. According to the camshaft manufacturing method and the camshaft, the abrasion resistance and the corrosion resistance are high, and meanwhile, the technical problem that hot cracks, expansion cracks and other defects occur to a mandrel after the camshaft and the mandrel are independently installed can be solved.

Description

technical field [0001] The invention relates to a manufacturing method of a camshaft, which comprises assembling a cam piece on a mandrel. The above-mentioned cam piece is formed by compounding two kinds of powder metallurgy materials applied on an engine, and its main classification number is F16H53 / 00(2006.01)I , the present invention also relates to a camshaft manufactured using the above manufacturing method. Background technique [0002] The camshaft is an important part of the gas distribution mechanism in the engine. The assembled camshaft generally includes multiple cam pieces and a mandrel; when the engine is working, the cam pieces are required to have high wear resistance, high corrosion resistance, and impact resistance. The mandrel is required to have good rigidity, bending resistance and torsion resistance. [0003] At present, medium and heavy-duty engines basically use integral camshafts, some of which are made of carburized low-carbon steel, some of which a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/16C22C38/12C22C38/02C22C38/20C22C38/22C22C38/42C22C38/44C22C38/36C22C38/56C22C37/10C22C37/08C22C37/06B22F5/08B22F7/02F01L1/047F01L1/08
CPCB22F5/08B22F7/02C22C37/06C22C37/08C22C37/10C22C38/02C22C38/12C22C38/16C22C38/20C22C38/22C22C38/36C22C38/42C22C38/44C22C38/56F01L1/047F01L1/08F01L2001/0471F01L2301/00F01L2303/00
Inventor 王政帅邬铭铭徐志江吴耀东杨尧炎宋国庆
Owner 绍兴春晖精密机电有限公司
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