Sand mold milling method based on industrial robot

Abstract

The invention relates to a method for adopting an industrial robot to carry out the ordinary sand mold milling processing, which pertains to the filed of the cross technology of casting, numeric control processing and the industrial robot. The steps of the method of the invention are that: a tool and a planned milling path are selected according to the shape of a sand mold to be processed, the generated NC code is translated into a control code of the robot according to a motion model of the industrial robot, thus realizing the gesture control of the robot during the processing process, carrying out the milling of a sand lump and finally carrying out the post-processing of the sand lump after the processing. Compared with the existing traditional casting mold processing method, the processing method of the invention can save the manufacturing link of the mold, reduce the processing procedure, shorten the production period and reduce the production cost; compared with the machine tool-based sand mold milling processing method, the processing method of the invention has larger processing range and higher processing flexibility, in particular to a motion guide track without the need of carrying out the strict sand control protection. The method of the invention is especially applicable to the single and small-batch processing and manufacturing of the large-scale sand mold.

Description

technical field [0001] The invention relates to a method for milling common sand molds by using an industrial robot, and belongs to the cross technical fields of casting, numerical control processing and industrial robots. Background technique [0002] Casting is one of the main methods to obtain mechanical product blanks, and is an important basic process in the machinery industry. With the globalization of the market and the intensification of competition, the speed of product upgrading is accelerating, and the demand for single-piece and small-batch castings is increasing. The production process of single-piece, small-batch, especially large-scale castings requires a short production cycle. , the manufacturing method is more flexible. However, the vast majority of manufacturers in my country still use the traditional wood foundry process, which not only has a long manufacturing cycle, high production costs, but also consumes a lot of resources. In order to solve this pr...

AI Technical Summary

Problems solved by technology

[0004] Traditional wooden sand mold manufacturing is suitable for the production of large quantities of castings. Due to the long processing period and high cost of wooden molds, it is difficult to manufacture high-precision and good surface quality molds, which cannot meet the processing requirements of single pieces and small batches.

The use of rapid prototyping technology to manufacture sand molds has the following disadvantages: layer-by-layer processing, low processing efficiency, and not suitable for processing large molds; binders or laser sintering will bond sand particles together to form a mold with a dense inner surface, poor air permeability, and castings Defects are prone to occur; layered processing will produce a step effect when processing some complex surfaces

The use of CNC machine tools for sand cutting has the following disadvantages: Sand milling is the inner surface processing of the cavity, which puts forward higher requirements for the processing flexibility of CNC machine tools; for large castings, large CNC processing machine tools are required, which increases equipment costs; cutting processing Flying sand is generated during the process, and the precision moving guide rail needs to be strictly protected

[0005] Aiming at the deficiencies of the existing casting mold manufacturing technology, the present invention proposes a sand mold processing method based on industrial robots. By adopting this method, casting sand molds of various shapes can be manufactured completely without molds, the processing range is improved, the production cycle is shortened, and the solution Sand Discharge of Casting Mold Cutting by CNC Machine Tool

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