Remedial method for surface out-of-tolerance in casting mold processing

Abstract

The invention provides a surface out-of-tolerance remedying method used in casting mold machining, belongs to the technical field of mold surface out-of-tolerance remedying methods and aims at solving the problem that although an overlaying-milling remedying method after molded surface overcut is effective, additional labors and devices are needed, certain material consumption is further brought and a manufacturing period is also prolonged. The surface out-of-tolerance remedying method used in casting mold machining comprises the steps of adopting gas welding flame to heat a casting under the conditions that oxygen pressure ranges from 0.4 MPa to 0.7 MPa, acetylene pressure ranges from 0.06 MPa to 0.09 MPa, evenly and annularly moving the flame on an out-of-tolerance surface till the flame reaches the edge of the out-of-tolerance surface, and continuing to perform heating for 5-40 seconds when the casting is in a red-hot state. Compared with the prior art, the surface out-of-tolerance remedying method has the technical advantages that the cost is very low, and the sum of acetylene cost and oxygen cost is much lower than overlaying-milling cost; a remedying period is very short and the problem can be solved for about one hour ordinarily; the cooled casting meets the technical requirement, and the quality acceptance standard is completely met.

Description

technical field [0001] The invention relates to a remedy method for surface out-of-tolerance in casting mold processing, and belongs to the technical field of mold out-of-tolerance remedy methods. Background technique [0002] At present, in the processing of castings, there are often many reasons such as cutting tools, machine tools, cutting parameters, and technical levels of personnel, resulting in the phenomenon of surface tolerance (surface tolerance is divided into two types, one is surface tolerance, such as mold surface ; The other is the over-tolerance of the interface, such as the large butt joint of the trimming mold insert), sometimes the over-tolerance is very small, and the range of the over-tolerance is between 0.01 and 0.2mm, even if the over-tolerance is small, the castings cannot be used , if it cannot be remedied, it will result in a waste product. [0003] In order to deliver castings on schedule and reduce losses, people are trying every means to solve ...

AI Technical Summary

Problems solved by technology

The remedial method of surfacing and milling after overcutting of the profile is considered to be the only remedial method at present. Although this method is effective, it needs to re-invest in manpower and equipment, and some materials are consumed, and the manufacturing cycle must also be increased.