Manufacturing method of green sand casting sprue cup milling cutter

Abstract

The invention provides a manufacturing method of a green sand casting sprue cup milling cutter. The manufacturing method comprises the following steps of (1) material selection, wherein a common carbon steel plate is selected as a base material; (2) linear cutting, wherein the carbon steel plate is machined into the outline of the milling cutter through the linear cutting technology; (3) blade machining, wherein the working area of the milling cutter is machined through a machining center, and a blade is machined out; and (4) local quenching of the working area, wherein the working area is quenched, the working area is heated to 800-1000 DEG C, after heat preservation is conducted for a certain time, the working area is taken out and put into saline water to be soaked for 3-10 min, and the area except the working area is not subjected to quenching treatment. According to the milling cutter manufactured through the method, the hardness of the working area reaches the standard, a mounting area has good toughness, the structural consistency is good, transition is smooth without concave-convex steps, cost is low, and performance is excellent.

Description

technical field [0001] The invention relates to the field of green sand casting sprue cups, in particular to a manufacturing method of green sand casting sprue cup milling cutters. Background technique [0002] Green sand casting is inseparable from sprue cup molding. Traditional sprue cup molding uses a composite milling cutter. The composite milling cutter includes an installation area and a work area. The installation area is usually made of ordinary iron material, and the work area is made of high-performance composite materials. , The installation area and the work area are connected together by manual welding due to different materials and the two areas are connected together by manual welding, so the production cycle is long and the cost is high. [0003] Because it is manual welding, and the material changes greatly, the welding is difficult and the quality is not easy to control. Not only the welding between the milling cutter working area and the installation area ...

AI Technical Summary

Problems solved by technology

[0002] Green sand casting is inseparable from sprue cup molding. Traditional sprue cup molding uses a composite milling cutter. The composite milling cutter includes an installation area and a work area. The installation area is usually made of ordinary iron material, and the work area is made of high-performance composite materials. , the installation area and the work area are connected together by manual welding due to different materials, the production cycle is long and the cost is high

[0003] Because it is manual welding, and the material changes greatly, the welding is difficult and the quality is not easy to control. Not only the welding between the milling cutter working area and the installation area is irregular, the transition is not smooth and the consistency is poor, but also the sprue cup is prone to forming during the working process. Irregularity, unevenness, and floating sand, especially in the arc transition area

[0004] Due to the above problems, when the box is closed, the floating sand falls into the cavity or rushes into the cavity with the molten iron during the pouring process, resulting in trachoma defects in the casting. In severe cases, the casting is scrapped, which greatly wastes the production cost.

[0005] Only manual blowing and inspection before closing the box can not be eliminated, and the influence of human factors is greater

[0006] In addition, there is also a process of making gate milling cutters by casting molding, such as the invention patent with the patent number: 201610611291.7. Although this process can realize the integral molding of milling cutters, as a milling cutter, it has relatively high performance requirements. High, will lead to low yield

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