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Casting dies for engine cam shaft

A technology for casting molds and camshafts, used in manufacturing tools, casting molding equipment, casting molds, etc., can solve the problem that the metallographic structure and mechanical and physical properties of castings cannot be effectively guaranteed, the rejection rate is high, and the molding is difficult. question

Inactive Publication Date: 2006-02-08
象山巨象机模有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the method of manufacturing the engine camshaft is integral casting, and the drive shaft and the cam are manufactured separately and then connected into one by welding or melting; the integral casting is more commonly used, and the sand mold casting process is generally used, because the cam The deep clamping groove formed by the cam of the shaft and the shaft diameter makes it very difficult to form a mold. At the same time, due to the high humidity of the sand mold, the metallographic structure and mechanical and physical properties of the casting cannot be effectively guaranteed, and the rejection rate is high.

Method used

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  • Casting dies for engine cam shaft

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Effect test

Embodiment 1

[0010] The casting mold of a kind of engine camshaft of the present invention is that the sand mold is replaced by a metal mold, and the camshaft is integrally cast; the material of said metal mold is a chrome-copper alloy, and wherein the composition of copper accounts for 93% of the total weight; the mold includes The cavity 2 surrounded by the mold body and the workpiece ejection mechanism have a runner 4 connected to the gate at the bottom, an inrunner 3 in the middle and a feeding riser 1 at the top in the cavity; The ejector mechanism consists of a top plate 6 and an ejector rod 8 fixed thereon, the ejector rod and the workpiece in the cavity can be connected in contact; there is a backing plate 7 between the mold body and the top plate, and a backing plate and a mold body There is a sealing ring 9, and a water cooling channel 5 is provided on the mold body. Using the high thermal conductivity of copper alloy, the heat is quickly taken away through the cooling system, so ...

Embodiment 2

[0012] In embodiment 1, the mold material is changed to nickel-copper alloy, and the copper component accounts for more than 80% of the total weight; the rest repeat embodiment 1.

Embodiment 3

[0014] In embodiment 1, the mold material is changed to tungsten-copper alloy, and the copper component accounts for more than 78% of the total weight; the rest repeat embodiment 1.

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Abstract

The invention relates to a casting mould of motor cam shaft made by metallic material and used to cast integral cam shaft. Material is copper alloy such as adnic alloy, chrome copper or copper-tungsten alloy with copper taking up 78-93% of gross weight. Compared with sand mold, it is convenient in modeling and removing from mould due to the low affinity between copper alloy and steel material. Copper alloy mould is equipped with coolant passage due to softening temperature of copper alloy being lower than that of feed liquid. The invention has the advantages of high-quality surface, accurate physical dimension and preferred physical-mechanical properties.

Description

technical field [0001] The invention relates to the technical field of transmission devices, in particular to the technical field of casting molds for camshafts. Background technique [0002] At present, the method of manufacturing the engine camshaft is integral casting, and the drive shaft and the cam are manufactured separately and then welded or melted to make them integrated; among them, the integral casting is more commonly used, usually by sand mold casting process, because the cam The deep clamping groove formed by the cam of the shaft and the shaft diameter makes it very difficult to form a mold. At the same time, due to the high humidity of the sand mold, the metallographic structure and mechanical and physical properties of the casting cannot be effectively guaranteed, and the reject rate is high. Contents of the invention [0003] The object of the present invention is to solve the above-mentioned problems in the prior art, and provide a casting mold for an eng...

Claims

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Application Information

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IPC IPC(8): B22C9/28B22C9/06
Inventor 鲍忠林
Owner 象山巨象机模有限公司
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