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Casting method of body casting of centrifugal air compressor

A centrifugal air compressor and air compressor technology, applied in the direction of casting molding equipment, casting molds, casting mold components, etc., can solve problems such as uneven wall thickness, difficulty in solidification and feeding of castings, complex structure, etc., and achieve heat dissipation , Excellent appearance quality, avoid brush marks

Active Publication Date: 2013-09-25
上海华新合金有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The wall thickness of the centrifugal air compressor body is designed to be 20mm at the thinnest point and over 100mm at the thickest point. The wall thickness is extremely uneven, which causes great difficulties for the solidification and feeding of castings.
[0004] 2. The casting combines the gear box and the turbocharger as a whole, and the structure is extremely complex, requiring multiple sand cores to cooperate, which puts forward higher requirements for the early process design

Method used

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  • Casting method of body casting of centrifugal air compressor
  • Casting method of body casting of centrifugal air compressor
  • Casting method of body casting of centrifugal air compressor

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Embodiment 1

[0027] see Figure 1 to Figure 6 , the present invention relates to a casting method for centrifugal air compressor body castings used in large-scale venues in the air-conditioning industry, comprising the following steps:

[0028] 1. Sand mixing, molding and core making

[0029] Air-conditioning centrifugal air compressor body castings use an automatic sand mixer to mix furan resin no-hardening sand before modeling and manufacturing 1~15# sand cores. Place insulation riser 21 and exhaust piece at the specified position of the upper mold before molding, then carry out sand filling, compaction, mold removal, mold repair, and carry out brushing and surface drying treatment. Then manufacture fifteen sand cores 1 to 15 of 1 to 15#, and place them for later use after brushing the paint and drying the surface.

[0030] 2. Fit

[0031] Put 1#~15# sand cores 1~15 into the upper and lower sand molds in sequence, and place two pieces of ceramic filter nets in the filter; after blowin...

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Abstract

The invention discloses a casting method of a body casting of a centrifugal air compressor. The method comprises the following steps of: sand mulling, moulding, core making, mould assembly, furnace burden melting, iron discharge incubation, pouring, cooling, box opening, casting cleaning and product quality inspection. In the invention, multiple sand cores are designed to form a whole casting, and the pouring of the whole casting is finished by adopting a mode of dispersing the pouring with multiple sheet-type ingates. The mechanical performance of the casting meets that the tensile strength is greater than or equal to 250MPa and the body hardness is 170-230HBS. The product does not have any internal casting defect.

Description

technical field [0001] The invention relates to a casting method, in particular to a casting method of a centrifugal air compressor body casting used in the air-conditioning industry. Background technique [0002] The centrifugal air compressor body is a key component of the air compressor used in large-scale venues. The mechanical design of this component combines the gear transmission part and the turbocharger part into one, achieving the effect of a compact structure. The turbocharged part of the body casting provides storage space for high-pressure air and works under high gas pressure, so the casting is required to have a dense structure and strong pressure and heat resistance. The excellent characteristics of gray cast iron, such as excellent shock resistance and thermal conductivity, make it very suitable as the main material for large-scale mechanical bodies. Therefore, the castings of the centrifugal air compressor body adopt gray cast iron HT250, and its mechanical...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D25/06B22D1/00B22C9/08B22C9/10C21B11/10
Inventor 徐清
Owner 上海华新合金有限公司
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