CN102672099A - Production method of mine car turning rolling ring and product - Google Patents

Abstract

The invention discloses a production method of a mine car turning rolling ring. The production method is characterized in that the production method is carried out according to the following steps that aluminum alloy is processed into a metal foam forming mold in a mine car turning rolling ring shape; polystyrene resin beads are filled into a mold cavity of the mold, and after the mutual melting through heating expansion, the mold is opened for taking out white foam products when the pressure reaches 5kg; the white foam products are put into a sand box, molding sand is fully filled through vibration; molten steel with the temperature being 1600 DEG C is cast from a water gap, and the molten steel fills the white foam burned vacancy after the white foam products are damaged through burning; a vacuum pump communicated with the sand box is started, and the vacuum is pumped until the pressure is 0.4 Pa; and the demolding is carried out after cooling, the sand is cleared, and the welding-free mine car turning rolling ring is obtained. The production method has the advantages that the gas cutting, the heating bending, the machining and the welding are avoided, so the production cost is reduced by 80 percent, the stress of each guide cone column can reach 10 tons, and the service life is prolonged from one year to four years.

Description

A kind of mine car stirs the production method and the product of rolling ring

Technical field

Wataru present invention and one kind of flip rolling ring, especially Wataru and one kind of tub turning circle rolling production methods and products.

Background technology

Coal mine car when it Bian set of transport is tramcar, when the tub is filled with coal would be coal mine to the coal fields of the dumping and the dumping of coal mine car device is flip rolling ring.Stirring its function of rolling ring is to utilize 7 guiding awl posts that stir in the rolling ring to locate, turn to, and rotates the mine car railway carriage with the coal dumping.At present, it all is to become different shape with the steel plate gas cutting that the manufacturer production of domestic production mine car is stirred rolling ring, and heating back circumflexion adds reinforcing plate again, and line, jewel hole, welding and with the moulding of lathe car are bored post with the guiding of car moulding again and be welded.This processing method exists the cost height, welding is prone to produce slag inclusion, welds defectives such as not passing through, leak weldering, makes and stirs the rolling ring quality defects.More important is that the rolling ring stress that stirs of welding is concentrated in welded joints, come off after causing guiding awl post repeatedly stressed, and the stiffener fracture, the fracture of the coal car that rolls guiding awl post, coal car rolls not in place, and railway carriage is stuck, security incidents such as overturning.Cause the massive losses of the person and property.

Summary of the invention

The objective of the invention is to low, the no weld seam of a kind of processing cost to be provided, do not produce production method and product that weld stress is concentrated, increase service life greatly mine car stirs rolling ring for the deficiency that overcomes prior art.Its concrete grammar is:

(1) aluminium alloy is processed into the metal foam mould that mine car stirs the rolling ring shape;

(2) the polystyrene resin bead is injected in the mold cavity, after adding thermal expansion and merging mutually, when pressure reached 5 kilograms, white froth pulp was taken out in die sinking;

(3) white froth pulp is put into the sandbox vibration and tamp molding sand;

(4) pouring temperature is 1600 ℃ a molten steel from the mouth of a river, molten steel with white froth pulp scaling loss after, molten steel is inserted the room of white foam scaling loss;

(5) start the vavuum pump that is communicated with sandbox, be evacuated to 0.4Pa;

(6) the cooling back demoulding, the mine car that sand removal is not welded stirs rolling ring.

Said p-poly-phenyl vinyl bead heating, its heating-up temperature is 160 ℃.

From the production method of the present invention can be seen as a lost mold casting preclude the use of this method, to produce the tub turning the rolling ring structure as a whole, no soldering points on the no stress concentration, stress concentration does not produce weld fracture problem, according to testing shows that the traditional method of producing Di tub turning circle each guide roller cone-cylinder force can only reach 2 tons, while the use of the present invention produces steel tub turning circle each guide roller cone column force may 10 tons.Maximum 1 year of the service life of rolling ring is stirred in general welding, and the cast steel mine car that the inventive method is produced stirs rolling ring and can use 4 years.Simultaneously, since not gas cutting, do not heat bending, not machine tooling, need not weld, so production cost has reduced by 80%.Reach low, the no weld seam of processing cost of the present invention fully, do not produced the goal of the invention that weld stress is concentrated, increase service life greatly.

The specific embodiment

Embodiment 1:

(1) aluminium alloy is processed into the metal foam mould that mine car stirs the rolling ring shape;

(2) the polystyrene resin bead is injected in the mold cavity, after adding thermal expansion and merging mutually, when pressure reached 5 kilograms, white froth pulp was taken out in die sinking;

(3) white froth pulp is put into the sandbox vibration and tamp molding sand;

(4) pouring temperature is 1600 ℃ a molten steel from the mouth of a river, molten steel with white froth pulp scaling loss after, molten steel is inserted the room of white foam scaling loss;

(5) start the vavuum pump that is communicated with sandbox, be evacuated to 0.4Pa;

(6) the cooling back demoulding, the mine car that sand removal is not welded stirs rolling ring.

Claims (3)

1. a mine car stirs the production method of rolling ring, it is characterized in that: follow these steps to carry out

(1) aluminium alloy is processed into the metal foam mould that mine car stirs the rolling ring shape;

(2) the polystyrene resin bead is injected in the mold cavity, after adding thermal expansion and merging mutually, when pressure reached 5 kilograms, white froth pulp was taken out in die sinking;

(3) white froth pulp is put into the sandbox vibration and tamp molding sand;

(4) pouring temperature is 1600 ℃ a molten steel from the mouth of a river, molten steel with white froth pulp scaling loss after, molten steel is inserted the room of white foam scaling loss;

(5) start the vavuum pump that is communicated with sandbox, be evacuated to 0.4Pa;

(6) the cooling back demoulding, the mine car that sand removal is not welded stirs rolling ring.

2. a kind of mine car according to claim 1 stirs the production method of rolling ring, it is characterized in that: said p-poly-phenyl vinyl bead heating, its heating-up temperature is 160 ℃.

3. a mine car stirs rolling ring, it is characterized in that: by the product of the said method production of claim 1.