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Method for using metal type sand-covering technique to manufacture brake drum

A technology of sand coating and braking drum for metal molds, applied in metal processing equipment, manufacturing tools, casting molds, etc. It can shorten the production cycle time, improve the labor conditions of workers, and achieve the effect of high yield

Active Publication Date: 2008-06-04
ZHUMADIAN ZHONGJI HUAJUN CASTING
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a method for manufacturing brake drums using metal mold sand-coating technology, which overcomes the out-of-round castings, poor surface quality and low yield caused by the traditional use of wet sand molding technology to manufacture brake drums , high cost and poor working environment, etc., and overcome the difficulty in determining the parting surface caused by the application of the existing metal sand coating process to the manufacture of brake drums, the positioning of the sand box and the model, and the sand box and the sand box Inconvenience, and difficulty in taking molds after sand covering

Method used

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  • Method for using metal type sand-covering technique to manufacture brake drum
  • Method for using metal type sand-covering technique to manufacture brake drum
  • Method for using metal type sand-covering technique to manufacture brake drum

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Embodiment Construction

[0050] Such as figure 1 Shown, the present invention adopts the method for making brake drum of metal type sand-covered process and comprises:

[0051]Step 101, determine the parting surface with the largest diameter of the brake drum, and determine the part with the large opening as the lower type, and the part with the small opening as the upper type; figure 2 As shown, the parting surface is determined by the maximum diameter of the brake drum D1, the downward direction from the arrow I is determined as the lower type, and the upward direction from the arrow O is determined as the upper type;

[0052] Step 102, respectively setting metal inner and outer models to ensure the inner and outer contour dimensions of the brake drum;

[0053] Step 103, respectively arranging metal inner and outer flasks for making the lower mold and upper mold of the brake drum;

[0054] Step 104, after assembling the inner model and inner flask, as well as the outer model and outer flask with ...

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Abstract

The invention relates to a method of manufacturing a brake drum by utilizing a metal-typed sand covering technique, comprising a die joint is determined by the maximum diameter position of the brake drum, a lower joint is determined by a large mouth part and an upper joint is determined by a small mouth part; an internal model and an external model are respectively arranged in order to ensure the internal profile dimension and the external profile dimension of the brake drum; an internal sand box and an external sand box are respectively arranged in order to manufacture the lower joint and the upper joint of the brake drum; after the internal model and the internal sand box, the external model and the external sand box are assembled according to prearranged clearances, the internal sand box and the external sand box are covered with sands through a sand injection hole; metal liquid is poured after the internal sand box and the external sand box with sand cover are tightly locked. The invention has the advantages of improving working environment, more precise dimension of the castings, better surface quality, higher yield, lower cost and higher production efficiency.

Description

technical field [0001] The invention relates to a method for manufacturing a vehicle brake drum, in particular to a method for manufacturing a brake drum by using a metal mold sand coating process. Background technique [0002] Brake drums are widely used in the automotive industry. The traditional production process of brake drum mainly adopts: green mold sand manual molding or green mold sand machine molding. [0003] For green mold sand manual molding, on the one hand, due to the need to vibrate first in the process of mold removal, the artificial force in the circumferential direction is inconsistent, so the cavity is not round after mold removal, that is, the human influence of the operation is greater, It is easy to lose the roundness of the casting due to the out-of-roundness of the cavity itself during the molding process, and the surface quality is poor, resulting in poor quality stability of the casting and a high rejection rate; on the other hand, the production ...

Claims

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Application Information

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IPC IPC(8): B22C9/06B22C21/02B22C23/00
Inventor 何栓周立刚周立成王贺闫启栋李建
Owner ZHUMADIAN ZHONGJI HUAJUN CASTING
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