CN101574726B

CN101574726B - Method for integrally casting the platform and frame of large laminator

Info

Publication number: CN101574726B
Application number: CN2009100745051A
Authority: CN
Inventors: 魏星; 魏洪利; 魏洪福
Original assignee: WEIHONGLI
Current assignee: WEIHONGLI
Priority date: 2009-06-18
Filing date: 2009-06-18
Publication date: 2011-01-05
Anticipated expiration: 2029-06-18
Also published as: CN101574726A

Abstract

The invention discloses a method for integrally casting the platform and frame of a large laminator, which comprises the steps of: preparing an upper casting box and a lower casting box, arranging a reinforced tie bar in the upper casting box, placing facing sands, tamping and striking off back sands, pricking venting holes, pumping CO2 for hardening, setting the inclination between the lower casting box and the ground to be 8 degrees, putting the back sands at the bottom of the lower casting box, arranging straws and hard coke on the back sands, leading out through hole-born vent pipes whichare arranged horizontally, tamping into a hard sand bed by 40 to 70-mesh water glass quartz sands with the diameter ranging from 100 to 120mm, putting a casting polystyrene lost foam in the hard sandbed, fixing an ingate and a horizontal sprue of a dead head, arranging a sprue cup back closing mold on a straight sprue led from the horizontal sprue, maintaining 20s/ton of molten steel in the spruecup by the casting pressure, stopping the casting after a plurality of ingates are fully filled until the molten steel begins to rise in the straight sprue the dead head, feeding casting, adding a thermal insulating agent and a feeding agent into the dead head after the feeding casting is finished, taking out the sands 48h to 72h later and tempering, thereby obtaining large laminator platform/frame casts.

Description

Large laminator platform, frame integral casting method

Technical field

The present invention relates to a kind of large laminator platform, frame integral casting method, can effectively improve the stability of laminating machine integral body, satisfy the lamination requirement.

Background technology

The heating platform of present related laminating machine and parts frame are the frame-type mechanical connection manner mostly.In lamination process, rock thereby have influence on the stability of equipment easily, the laminate quality of remote-effects assembly.For addressing this problem, this manufacturing attempts to adopt forging type to realize the stand of laminating machine.Because of belonging to the massive casting workpiece, make quite difficulty of its casting.Because of its conventional casting method is the horizontal sculpting method of employing for the platform body, cast gate then take straight mould and in water mode or a plurality of ingate method, during cast since molten steel enter and produce abnormal flow behind the die cavity and be easy to generate cold shut state or underpriming or defective such as fillet occurs to, the molten steel that molten steel that the result enters in advance and later stage enter die cavity; In addition, the die cavity internal gas is difficult to get rid of, and produces a large amount of pores.Therefore common casting method is difficult to casting large heating platform and disjunctor frame.

Summary of the invention

In view of above-mentioned present situation, the invention provides a kind of large laminator platform, frame integral casting method, the fillet problem that the cold shut state that can effectively avoid in the casting process being produced or underpriming occur satisfies the application requirements of foundry goods.

For achieving the above object, large laminator platform provided by the invention, frame integral casting method comprise the steps:

1, presses the foundry goods specification preparation sandbox of split up and down, in cope, be provided with the reinforcement lacing wire of making groined type by every square metre;

2, after evenly being placed the tamping of floor sand layer, cope is not less than thickness 80mm; Finishing is wipeed off after the fully interior tamping of placed side layer of sand then, and venting also blows CO ₂Sclerosis;

3, take off sandbox and ground and be placed to 8 degree inclination angles placements, it is thick that floor sand is placed drag box bottom 100mm, along the straw of laying 50mm thickness on the floor sand, re-lay the coke of 170mm thickness, in coke, along many blast pipes of horizontal uniform laying and draw the drag box outside, use the hard casting bed of the 100-120mm40-70 order waterglass floating one-tenth of quartz sand tamping at last;

4, with the preparation foundry goods polystyrene disappearance mould be placed in the hard casting bed of drag box, fixedly have the runner gate of a plurality of ingates and rising head, on the down gate that runner gate is drawn the installation cup and with the cope matched moulds;

5, the tapping temperature of pour steel is not less than 1650 ℃, and pouring pressure will guarantee to remain in the cup 20 seconds/ton molten steel, treats that a plurality of ingates fill that type is full to stop cast when down gate and rising head begin molten steel rises is arranged; Treating that molten steel produces recessed phenomenon in the rising head begins feeding, feeding is finished after in rising head interpolation prevent to lower the temperature too fast heat preserving agent and feeding agent seal;

6, shake out after 48-72 to be cast hour, obtain mould casting after tempered.

In the present invention, the atmospheric pressure that is blown into argon Ar is 0.6Pa; Time is 5-7 second; It is 0.1m that steel per ton on average consumes the argon amount ³About.

In sum, large laminator platform provided by the invention, frame integral casting method form because of adopting monoblock cast, have guaranteed the stability when laminating machine is worked, and help the laminate quality of assembly, and the service life of improving laminating machine.

Description of drawings

Fig. 1 is a reference view of the present invention.

The specific embodiment

The invention will be further described below in conjunction with accompanying drawing embodiment.

With reference to figure 1, processing step of the present invention comprises: at first the specification by foundry goods prepares cope 1 and drag box 2; In cope 1, fixedly install by every square metre of reinforcement lacing wire 3 of making groined type standby; Cope evenly is not less than thickness 80mm after 14 tamping of laying floor sand layer in 1; Finishing is wipeed off after the 13 abundant tampings of paved surface layer of sand then, and venting also blows CO ₂Sclerosis; Drag box 2 and ground are placed to 8 degree inclination angles places, after drag box 2 is fixed, drag box 2 bottoms are laid the floor sand layer 4 of about 100mm thickness, on floor sand layer 4, lay the straw layer 5 of 50mm, the coke layer 6 that adds 170mm thickness thereon, in coke layer 6 along 82 cun blast pipes 7 with holes of horizontal uniform laying and draw the outside of drag box 2, at last with 100-120mm40-70 order waterglass quartz sand surface layer 8 and be blown into CO ₂The hard casting bed of the floating one-tenth of tamping; The foundry goods polystyrene disappearance mould 15 of preparation is placed in the hard casting bed, fixedly has the runner gate 11 of 5 ingates 9 and rising head 10, cup 16 backs and cope are installed on the down gate 12 that runner gate 11 is drawn 1 matched moulds; According to condition of work, the needed qualified molten steel of melting, the tapping temperature of pour steel is not less than 1650 ℃, preferably take to wrap interior refining, or the blowing argon gas processing obtains pure molten steel; When pouring into a mould at last, pouring pressure will guarantee to remain in the cup 20 seconds/ton molten steel, molten steel enters down gate 12 back and directly advances 1 by runner gate 11 rapidly and go into first ingate 9 along with the reinforcement of pressure, by that analogy, at last the 5th ingate 9 filled that type is full to stop cast when down gate 12 and rising head 10 begin to have molten steel slowly to rise; When observing in the rising head 10 molten steel and producing recessed phenomenon, the beginning feeding, feeding is finished after in rising head 10 interpolation prevent to lower the temperature too fast heat preserving agent and feeding agent seal; Can shake out after 48-72 to be cast hour, obtain qualified mould casting after tempered.

In above-mentioned, be to select for use through blowing argon gas to handle the molten steel obtain to embodiment; Otherwise after will obtaining qualified molten steel, finally also to carry out deoxidation treatment.

The purpose that is blown into argon gas (Ar) is in order to reduce H, the N in the molten steel, the impurity content of O; The atmospheric pressure that is blown into argon gas (Ar) is 0.6Pa; Time is 5-7 second; It is 0.1m that steel per ton on average consumes the argon amount ³About.

Above-mentioned related runner gate 11 is to adopt diameter 70mm; Down gate 12 is to adopt diameter 80mm; Ingate 9 is to adopt diameter 60mm.

Claims

1. large laminator platform, frame integral casting method, its method step comprises:

1) prepares the cope (1) and the drag box (2) of split by the foundry goods specification, in cope (1), be provided with the reinforcement lacing wire (3) of making groined type by every square metre;

2) after evenly placing the floor sand tamping in the cope (1), be not less than thickness 80mm; Place facing sand (13) then and fully repair strickling after the tamping, venting also blows CO ₂Sclerosis;

3) take off sandbox (2) and be arranged to 8 degree inclination angles placements with ground, it is thick that floor sand is placed drag box (2) bottom 100mm, along the straw layer (5) of laying 50mm on the floor sand, the coke (6) that adds 170mm thickness again, in coke, along many blast pipes of horizontal uniform laying and draw the drag box outside, use the hard casting bed of the floating one-tenth of 100-120mm40-70 order waterglass quartz sand surface layer (8) tamping at last;

4) the foundry goods polystyrene disappearance mould (15) with preparation is placed in the hard casting bed of drag box (2), the runner gate (11) that fixedly has a plurality of ingates (9) and rising head (10) is gone up installation cup (16) back and cope (1) matched moulds at the down gate (12) that runner gate (11) is drawn;

5) tapping temperature of pour steel is not less than 1650 ℃, and pouring pressure will guarantee to remain in the cup 20 seconds/ton molten steel, treats that a plurality of ingates (9) fill that type is full to stop cast to down gate (12) and rising head (10) when beginning molten steel rises is arranged; Treat that the interior molten steel of rising head (10) produces recessed phenomenon and begins feeding, in rising head (10), add prevent to lower the temperature too fast heat preserving agent and feeding agent after feeding is finished and seal;

6) shake out after 48-72 to be cast hour, obtain mould casting after tempered.

2. by the described method of claim 1, it is characterized in that described molten steel for handling the molten steel that obtains through blowing argon gas, the atmospheric pressure that is blown into argon gas is 0.6Pa; Time is 5-7 second; It is 0.1m that steel per ton on average consumes the argon gas amount ³