CN105537521A - Production method for bimetallic hammer head - Google Patents

Abstract

The invention relates to a production method for a bimetallic hammer head. The production method comprises the following steps: adopting a lost foam technology to firstly carry out model assembly, then, using dry sand to bury a model, putting an encased sandbox into a pit and finally carrying out vacuum-pumping to enter a casting process; adopting a two-fluid metal composite casting technology, selecting a low-alloy steel material as a hammer handle, and adopting a high-chromium cast iron material as a hammer end; firstly pouring the hammer handle part, and then pouring the hammer end part when a solid thin layer is formed on the surface of the hammer handle part; and after the pouring, taking out a casting to clear and thermally treat after preserving the heat for enough time in the sandbox. According to the production method, the bimetallic hammer head is produced from two materials by virtue of the lost foam production technology and the two-fluid metal composite casting technology, so that the success rate and the stability of the bimetallic composite material preparation can be effective guaranteed, the production efficiency is greatly improved, and the labor intensity of a worker is reduced.

Description

The production method of bimetal hammerhead

Technical field

The present invention relates to the production method of hammer head of hammer crusher, specifically a kind of production method of bimetal hammerhead.

Background technology

Hammer mill is the widely used crushing mechanisms of industry such as cement, metallurgy, mine, coal, building materials and traffic, and grinder hammerhead is its critical component is also attrition component, and its workload is extremely heavy, and condition of work is extremely harsh.Tup entirety can be divided into hammer handle and hammer tip two parts according to job specification difference, and different parts requires to have different serviceabilities.Hammer handle requires to have comprehensive mechanical performance, have certain intensity and toughness; And the main portions of tup wearing and tearing is hammer tips, therefore require that hammer tip has higher anti-wear performance.Thus low-alloy steel hammer handle and rich chromium cast iron hammer tip composite construction is selected to be good.

Existing grinder hammerhead, because tup monomer weight is little, quantity large, generally adopts ordinary sand casting, and adopt homogenous material one-time cast-forming, and adopt ordinary sand casting production bimetal hammerhead, efficiency is low, labor strength is large, is not suitable for producing in enormous quantities.

Summary of the invention

The present invention provides a kind of production method with the bimetal hammerhead that production efficiency is high, labor strength is low under being intended to ensure the condition of the security of tup, reliability, wearability.

Realize above-mentioned purpose of the present invention, the technical scheme of employing is:

A production method for bimetal hammerhead, is characterized in that, carries out in the steps below:

(1) adopt evaporative pattern, it is assembled first to carry out model, then uses dry sand to bury model, and the sandbox after vanning is put into melt pit, finally vacuumize, enter cast operation;

(2) adopt the casting of biliquid metal composite, select low-alloy steel material as hammer handle, rich chromium cast iron material is as hammer tip; First pour into a mould hammer handle part, treat that there is a solid thin layer on surface, then pour into a mould hammer tip part; After cast, until after sandbox inside holding enough time, take out casting cleaning, heat treatment.

Adopt the present invention of technique scheme, compared with prior art, its beneficial effect is:

By evaporative pattern production technology and biliquid metal composite foundry engieering, bi-material is produced a kind of two golden composite hammer head, evaporative pattern foundry goods dry sand buries model, can Reusability, and industrial refuse is few, and cost obviously reduces.Lost foam casting does not have burr, can reduce more than 80% during fettler.The application of evaporative pattern technology in bimetal hammerhead is produced simultaneously, theoretical foundation and technological guidance is provided by for the industrialization of advanced wear resistant composite material, mass production, effectively can ensure success rate prepared by double metallic composite material and stability, substantially increase production efficiency and reduce labor strength.

Accompanying drawing explanation

Fig. 1 is the assembled schematic diagram of model of the embodiment of the present invention;

Fig. 2 is Fig. 1 side view;

Fig. 3 is that sketch arranged by sandbox;

In figure: 1-steel alloy cast gate; 2-rich chromium cast iron cast gate; 3-insulated feeder; 4-chill; 5-hammer tip part; 6-hammer handle part; 7-melt pit; 8-sandbox; 9-foundry goods.

Detailed description of the invention

Below in conjunction with embodiment in detail the present invention is described in detail, but embodiment does not form any restriction to the present invention.

See Fig. 1, Fig. 2, a kind of production method of bimetal hammerhead, carry out in the steps below:

(1) carry out the model of evaporative pattern according to design technology assembled, it comprises: steel alloy cast gate 1, rich chromium cast iron cast gate 2, insulated feeder 3, chill 4, hammer tip part 5, hammer handle part 6; Use dry sand to bury the model of foundry goods 9, the sandbox 8 after vanning is put into melt pit 7; After finally vacuumizing, negative pressure value is 0.05MPa.

(2) select low-alloy steel material as hammer handle part 6, rich chromium cast iron material is as hammer tip part 5; During cast, first pour into a mould hammer handle part 6, pouring temperature is 1550 DEG C, and treat that chill 4 surface of position has a solid thin layer, then pour into a mould hammer tip part 5, pouring temperature is 1560 DEG C, both time interval 30s; After cast, until at sandbox 8 inside holding after 24 hours, take out that foundry goods 9 is cleared up, heat treatment.

The foregoing is only the better feasible embodiment of the present invention, not thereby limit to interest field of the present invention, the equivalence change that all utilizations description of the present invention is done, be all contained within interest field of the present invention.

Claims (1)

1. a production method for bimetal hammerhead, is characterized in that, carries out in the steps below:

(1) adopt evaporative pattern, it is assembled first to carry out model, then uses dry sand to bury model, and the sandbox after vanning is put into melt pit, finally vacuumize, enter cast operation;

(2) adopt the casting of biliquid metal composite, select low-alloy steel material as hammer handle, rich chromium cast iron material is as hammer tip; First pour into a mould hammer handle part, treat that there is a solid thin layer on surface, then pour into a mould hammer tip part; After cast, until after sandbox inside holding enough time, take out casting cleaning, heat treatment.