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Manufacturing method of precision casting of titanium alloy impeller

A manufacturing method and technology of precision castings, applied in the direction of manufacturing tools, casting molding equipment, casting molds, etc., can solve problems such as unsatisfactory design performance, undetectable inner cavity of blade mold, difficult core processing, etc., and achieve good industrial application value and market prospects, eliminating the effects of low precision and substandard performance, and facilitating CNC machining and testing

Inactive Publication Date: 2015-03-25
LUOYANG SUNRUI TI PRECISION CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The core of the impeller mold produced by this manufacturing method is difficult to process, the inner cavity of the blade mold cannot be detected, the precision of the cast casting is seriously out of tolerance, the blades are evenly divided, and the blades are evenly divided. After multiple repairs in the later stage, the design performance still cannot be met, resulting in low impeller head. , short life

Method used

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  • Manufacturing method of precision casting of titanium alloy impeller
  • Manufacturing method of precision casting of titanium alloy impeller
  • Manufacturing method of precision casting of titanium alloy impeller

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040]A ZTA2 titanium alloy impeller, model: 2-104 049 402, impeller dimensions ￠186×70, left-handed blade, Z=7, casting weight 4.5kg. Main manufacturing technical parameters: left-handed blade, Z=7, blade spacing at the inlet end, a1c=14+0.7 0mm (￠90), a1i=10+0.7 0mm (￠42).

[0041] Implementation process flow: Process design of "leaf-forming method" - "leaf-forming method" graphite mold making - graphite mold brushing - graphite mold inspection - graphite mold degassing - graphite mold assembly - pouring castings - casting inspection, The specific process is:

[0042] (1), > process design scheme:

[0043] (1.1) Draw the casting drawing: According to the impeller product drawing provided by the customer, place a 3mm processing amount on the processing part, the main manufacturing technical parameters: the blade is left-handed, Z=7, the blade spacing at the inlet end, a1c=14+0.7 0mm (￠90 ), a1i=10+0.7 0mm (￠42), and the remaining dimensional tolerances are marked with casti...

Embodiment 2

[0058] A SB367-G5 titanium alloy impeller, model XY280-40-03, impeller dimensions ￠324×160, left-handed blade, Z=6, casting weight 17kg. Manufacturing technical parameters: left-handed blades, Z=6, blade spacing at the inlet end, a1c=17±0.7mm (￠125), a1i=14±0.5mm (￠76), hydraulic dimensions of castings are implemented according to GB / T6979-93B level , The impeller is tested for dynamic balance, and the unbalance is less than 6g.

[0059] Implementation process flow: Process design of "leaf-forming method" - "leaf-forming method" graphite mold making - graphite mold brushing - graphite mold inspection - graphite mold degassing - graphite mold assembly - pouring castings - casting inspection, The specific process is:

[0060] (1), > process design scheme:

[0061] (1.1) Draw the casting drawing: according to the impeller product drawing provided by the customer, put the processing amount on the processing part, the main manufacturing technical parameters: the blade is left-han...

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Abstract

The invention provides a manufacturing method of a precision casting of a titanium alloy impeller, which is used for manufacturing a casting by using an impeller splitting and mould assembly method. The manufacturing method comprises the following steps of mould design, machining of a curve outline of an impeller mould, finishing, swabbing, mould detection, single-impeller splitting and mould assembly, degassing, assembly, pouring, core removal, and casting detection, wherein positioning spigots are respectively arranged on an upper mould and a lower mould of the impeller mould, so as to prevent the mould from shifting; a mould core is arranged between the upper mould and the lower mould of the impeller mould; a single impeller parting line and a wire passing fixing groove are arranged on the mould core; a mould of the mould core is designed to be an opened single impeller mould, and a process step hole is designed and cut in the middle of the mould core; and a positioning pin is assembled on the process step hole of the mould core when the mould core is detected, and the two impeller moulds with sequential numbers are combined together by using a positioning step pin as an axis center. With the adoption of the manufacturing method provided by the invention, the technical difficulties in the normal manufacturing method that the mould core is difficult to machine and the size and an inner cavity of the mould cannot be detected can be overcome, so that the precision requirement of the CT (Casting Tolerance) 7 level of the mould can be ensured, and the problem that the casting precision is low can be solved.

Description

technical field [0001] The invention relates to a titanium alloy material processing technology, in particular to a manufacturing method of a titanium alloy impeller precision casting. Background technique [0002] With the development of centrifugal pumps in the direction of high speed, the speed and head of the impeller must be increased, and the stress generated by the centrifugal force due to the fast operation of the impeller also increases. When the speed exceeds a certain value, the impeller will be damaged. In order to expand the effective flow surface of the impeller channel, it is hoped that the blades should be as thin as possible, but if the blades are too thin, there will be certain difficulties in the casting process. In order to obtain impellers with fast speed and high lift, the casting precision of titanium alloy impellers must be improved. This method is mainly to improve the casting precision of the impeller. [0003] The manufacturing method of the tit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/28
Inventor 郭举乐娄贯涛陈丽萍张志正
Owner LUOYANG SUNRUI TI PRECISION CASTING
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