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Connection method of steel core and metal mold mandrel in aluminum alloy casting

A technology of aluminum alloy castings and metal casting molds, which is applied in the field of casting, can solve the problems that the pass rate of castings is less than 50%, easy to change, castings are out of tolerance, etc., and achieve the effect of improving the pass rate

Active Publication Date: 2016-08-24
LANZHOU FLIGHT CONTROL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its disadvantage is that there is no fastening mechanism between the steel core 2 and the metal mold mandrel 4. During the low-pressure casting process, the relative position of the steel core 2 and the metal mold mandrel 4 is prone to change, resulting in out-of-tolerance castings. Even scrapped, the pass rate of castings is less than 50%

Method used

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  • Connection method of steel core and metal mold mandrel in aluminum alloy casting
  • Connection method of steel core and metal mold mandrel in aluminum alloy casting
  • Connection method of steel core and metal mold mandrel in aluminum alloy casting

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Embodiment

[0018] The end cover of the high-speed rail motor is produced by low-pressure casting technology, and the inner diameter of the steel core 2 is φ120 +0.1 mm, the outer diameter of the metal casting mold mandrel is φ120 -0.1 mm.

[0019] 1. Machining rivet blind holes on the lower end surface of the metal casting mold mandrel 4: machining 2 rivet blind holes uniformly distributed along the circumference on the lower end surface of the metal casting mold mandrel 4, and the hole walls of the rivet blind holes are aligned with the metal casting mold mandrel 4 The outer cylindrical surface of the rivet blind hole is tangent, the diameter d of the rivet blind hole is 4mm, and an axial long slot is milled at the position where the hole wall of the rivet blind hole is tangent to the outer cylindrical surface of the metal casting mold mandrel 4, and the length of the long slot is equal to The depth of the blind hole of the rivet, the width of the slot w=4mm;

[0020] 2. Install the s...

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Abstract

The invention belongs to a casting technique and relates to a method for connecting a steel core and a metal mold mandrel in aluminum alloy castings. The connecting step of the steel core (2) and the metal mold mandrel (4) comprises: processing rivet blind holes on the lower end face of the metal mold mandrel (4); installing the steel core (2); fastening the steel core (2). In the method for connecting the steel core and the metal mold mandrel in aluminum alloy castings, the relative positions of the steel core (2) and the metal mold mandrel (4) cannot be changed in the low pressure casting process, thereby improving the qualified rate of the castings.

Description

technical field [0001] The invention belongs to the casting technology and relates to a method for connecting a steel core in an aluminum alloy casting and a metal casting mold mandrel. Background technique [0002] For the local structure of the shell casting of a certain type of high-speed rail motor, see figure 1 , the casting is an aluminum alloy casting. There is a steel core 2 inside the aluminum alloy casting, which is a steel cylinder. The steel core 2 is located around the central hole of the aluminum alloy casting 1. The inner cylindrical surface of the inner hole of the steel core 2 is in contact with The inner cylindrical surfaces of the central hole of the aluminum alloy casting 1 are coplanar, and the remaining surface of the steel core 2 is wrapped by aluminum alloy. The lower end face of the lower end face and the lower end face of the mandrel 4 are coplanar. During casting, the steel core 2 needs to be installed on the mandrel 4 of the movable mold of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D18/04
CPCB22D18/04
Inventor 王松海杨世林何金宝王海涛
Owner LANZHOU FLIGHT CONTROL