Casting method for screw rotor of single-screw compressor

A single-screw compressor and single-screw technology, which is applied in the field of parts manufacturing, can solve the problems that the casting of the screw rotor of the single-screw compressor cannot be realized, and achieve the effect of shortening the processing cycle and reducing costs

Inactive Publication Date: 2015-10-28
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a casting method for the screw rotor of a single screw compressor, so as to solve the problem that the casting of the screw rotor of a single screw compressor cannot be realized in the prior art

Method used

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  • Casting method for screw rotor of single-screw compressor
  • Casting method for screw rotor of single-screw compressor
  • Casting method for screw rotor of single-screw compressor

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Embodiment Construction

[0033] see Figure 1 to Figure 8 Shown, a kind of single-screw compressor screw rotor casting method of the present invention comprises the following steps:

[0034] 1), see figure 1 and figure 2 As shown, a solid cylinder is processed into a toothed single-screw rotor blank with a lathe, and the single-screw rotor blank includes a kidney-shaped solid blank and 6 screw tooth blanks 1 evenly arranged on the outer periphery of the kidney-shaped solid blank; 6 screw teeth Blank 1 is inclined and evenly arranged on the waist-shaped solid blank, and the teeth are twisted;

[0035] The machining allowance of the single-screw rotor blank relative to the finished product is 2-5mm;

[0036] 2), see image 3 As shown, the waist-shaped solid blank 2 other than the screw tooth blank 1 is turned off by a CNC lathe, leaving a complete six screw tooth blank 1;

[0037] 3) Then, use a lathe to process a solid cylinder into a kidney-shaped solid blank 2 with the same structure and size a...

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Abstract

The invention discloses a method for casting a screw rotor of a single-screw compressor. The method is characterized in that teeth of a screw rotor mold are separated from reniform entities inside a rotor; each reniform entity inside the rotor is divided into two sections from the thin waist part; the screw teeth are divided into two sections at the highest tooth and are all connected with the reniform entities through positioning pins; the two reniform entities are connected to form a mold through a bolt; the mold is used for preparing a sand mold, and then the bolt for connecting the reniform entities is loosed and removed; the positioning pins for connecting all screw mold teeth and the reniform entities are removed; two reniform mold entities of the mold are taken out from two end surfaces of a sand box respectively; the mold teeth divided into two sections are taken out from the two ends; finally, a single-screw rotor cast blank is cast through mold assembly and casting, and machining allowance is removed through machining to form a finished product. The method achieves the possibility of preparing a single-screw rotor through casting; compared with a method of preparing a single-screw rotor through machining, the method provided by the invention has the advantages of greatly lowering the cost and effectively shortening the processing period.

Description

technical field [0001] The invention relates to the technical field of component manufacturing, in particular to a casting method for a screw rotor of a single-screw compressor. Background technique [0002] Single-screw compressor is a rotary machine with excellent structural performance. Since the development began abroad in the 1960s, a variety of products have entered the industrial market. see figure 1 and figure 2 As shown, there are six teeth on the general single-screw rotor, which are arranged obliquely on the cylindrical surface, and the teeth are twisted; using the conventional integral casting method, the mold made is difficult to take out from the sand mold; even if a plastic mold or wax mold is used The plastic model or paraffin model of the screw is difficult to take out from the original mold in the method of making lost foam. On the one hand, metal materials are wasted, on the other hand, a large amount of processing man-hours are consumed, and the cost...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/22B22C9/02
Inventor 王晓红郭晋源李挺程军明余宾宴冯全科余小玲
Owner XI AN JIAOTONG UNIV
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