CN106141141A

CN106141141A - The piston of a kind of large aluminum alloy extrusion casint and foundry engieering thereof

Info

Publication number: CN106141141A
Application number: CN201510211681.0A
Authority: CN
Inventors: 傅金观; 吴新陆
Original assignee: Jiaxing Juxin Mould Technology Co Ltd; Zhejiang Ya Lu Casts Co Ltd
Current assignee: Jiaxing Juxin Mould Technology Co Ltd; Zhejiang Ya Lu Casts Co Ltd
Priority date: 2015-04-21
Filing date: 2015-04-21
Publication date: 2016-11-23

Abstract

The present invention discloses piston and the foundry engieering thereof of a kind of large aluminum alloy extrusion casint, it is characterized in that piston press casting mould is made up of dynamic model main core, fixing die, piston pin core, push rod, combustor core, hydraulic core_pulling device；Described piston pin core, combustor core are by fixing each part figuration on die；The inner chamber of piston is then by the main core figuration in dynamic model；Extrution casting technique is as follows: dynamic fixed two parts of mould are respectively arranged on the bolster of extrusion casting machine, and maintain a certain distance；Mechanical hand dips quantitative molten aluminium alloy, pour into snakelike funnel and flow into the cavity of fixing die with mild state, the main core at dynamic model position is pressed down immediately, enter aluminium alloy liquid level, and allow it be gradually increasing until aluminum liquid is full of the near closed hollow ring that active and inactive mold is constituted, liquid aluminium alloy solidifies the most under stress, and shell now has i.e. possessed the elementary contour of profile in Piston Casting.

Description

The piston of a kind of large aluminum alloy extrusion casint and foundry engieering thereof

Technical field

Patent of the present invention relates to piston and the foundry engieering thereof of a kind of large aluminum alloy extrusion casint, squeezes particularly to aluminium alloy Pressure casting mould design and processes, belongs to aluminum alloy casting technique technical field.

Background technology:

Power diesel engine more than 1,000 horsepowers generally has 12 cylinders, and traditional piston the most cylinder iron makes, but by The heaviest in ironcasting self, need during operating to spend the biggest idle work energy, put off until some time later its dynamic balancing and be also difficult to reach perfect condition. In recent years professional factory uses aluminium alloy instead one after another to substitute cast iron, but is limited by the inherent structure of piston；Foundry goods each several part wall thickness hangs Very, from the longitudinal section of piston, clerk sees, thinnest part is skirt section, and at this, foundry goods thickness is only 20mm, and thickness is combustor And the part between piston pin hole, more than 80mm；The biggest Wall-Thickness Difference necessarily cause foundry goods in cooling procedure, at heavy wall in The solidification of heart position is the slowest, it appears that having become the rising head at thin-walled position, the liquid metal at this is sucked away, and causes various latent defect With the even draw of appearance deflated, loosening, having pore even shrinkage cavity, even latent defect often in being randomly distributed occur in foundry goods, Therefore each piston is intended to through counterweight before use to obtain balance.

The piston of patent large aluminum alloy extrusion casint of the present invention and foundry engieering thereof, the method using Novel extrusion casting, Make up the deficiency of traditional handicraft, reach the effect of Improving The Quality of Products, thus realize reducing cost, improving casting qualified rate, increasing Strong enterprise competitiveness in the market.

Summary of the invention

The piston of a kind of large aluminum alloy extrusion casint and foundry engieering thereof, is characterized in that piston press casting mould is by dynamic model Main core, fixing die, piston pin core, push rod, combustor core, hydraulic core_pulling device composition；Described mould is extruding Casting die, the profile of Piston Casting；Described piston pin core, combustor core are by fixing each part figuration on die；Piston Inner chamber then by the main core figuration in dynamic model；Operation principle: piston pin core is driven by hydraulic core_pulling device, on Operational preparation rank Section hydraulic core_pulling device is in going-back position and is exposed in the cavity of fixing die by piston pin core only pommel；And constitute combustor Cast-in core have auxiliary push-rod concurrently from fixing die, release the effect of Piston Casting；Extrution casting technique is as follows: mould Dynamic fixed two parts are respectively arranged on the bolster of extrusion casting machine, and maintain a certain distance；Mechanical hand dips the most melted Aluminium alloy, pours into snakelike funnel and flows into the cavity of fixing die with mild state, and the main core at dynamic model position is pressed down immediately, Enter aluminium alloy liquid level and allow it be gradually increasing until aluminum liquid is full of the near closed hollow ring that active and inactive mold is constituted, being used in the process Ratio crimp nearly 100MPa, and pressurize a period of time, liquid aluminium alloy solidifies the most under stress, now with the receipts of aluminum alloy melt The volume of contracting near closed hollow ring slightly reduces；The alloy being meanwhile close to fixing mould die and dynamic model main core quickly condenses formation The shell of one progressive additive, presses under the higher continuation quickly hindering dynamic model main core of its structural strength, and shell now i.e. possesses The elementary contour of profile in Piston Casting.

Use will be appreciated that of patent of the present invention: when the alloy of Piston Casting thick wall part is also in liquid or semi liquid state Time start piston pin hole core forward, compel to enable aluminum alloy to flowing to fill up the foundry goods thin-walled position shunk in advance, until foundry goods is complete Portion solidifies, even if obtaining the feeding of aluminium alloy before the piston pin direction of motion at the heavy wall of final set the most all the time, do so is obtained Any position of its macroscopic view longitudinal section of the foundry goods obtained all can reach higher technology requirement；Follow-up pressure can make the crystallization of alloy enter The broken refinement of one step, make Piston Casting no matter as cast condition or the mechanical performance processed through T6 and a few indifference of forging away from, the most do not forge The anisotropic deficiency of part.

Accompanying drawing explanation

Fig. 1: be illustrated as the squeeze casting mould structure of a kind of large aluminum alloy piston.

1, dynamic model main core, 2, fixing die, 3, piston pin core, 4, push rod, 5, combustor core, 6, hydraulic pressure takes out Core device

Detailed description of the invention

As it is shown in figure 1, what the piston of a kind of large aluminum alloy extrusion casint and foundry engieering thereof were implemented: piston squeezes Pressure casting mould is by dynamic model main core 1, fixing die 2, piston pin core 3, push rod 4, combustor core 5, hydraulic core_pulling Device 6 forms；Described mould is extrusion casint mould, the profile of Piston Casting；Described piston pin core 3, combustor core 5 By part figuration each on fixing die 2；The inner chamber of piston is then by dynamic model main core 1 figuration；Operation principle: piston pin core 3 Driven by hydraulic core_pulling device 6, be in going-back position at Operational preparation stage hydraulic core_pulling device 6 and only have pommel by piston pin core 3 It is exposed in the cavity of fixing die 2；And constitute combustor core 5 and have auxiliary push-rod 4 concurrently from fixing die 2, release piston The effect of foundry goods；Extrution casting technique is as follows: dynamic fixed two parts of mould are respectively arranged on the bolster of extrusion casting machine, And maintain a certain distance；Mechanical hand dips quantitative molten aluminium alloy, pours into snakelike funnel and flows into fixing die with mild state The cavity of 2, dynamic model main core 1 is pressed down immediately, enters aluminium alloy liquid level and allows it be gradually increasing until aluminum liquid is full dynamic fixed The near closed hollow ring that mould is constituted, the ratio used in the process crimps nearly 100MPa, and pressurize a period of time, and liquid aluminium closes Jin Ze solidifies under stress, now slightly reduces with the volume of the pinch confinement die cavity of aluminum alloy melt；Meanwhile with fixing die 2 and the alloy be close to of dynamic model main core 1 quickly condense the shell forming a progressive additive, its structural strength is higher quickly to be hindered Pressing under the continuation of dynamic model main core 1, shell now has i.e. possessed the elementary contour of profile in Piston Casting.

Claims

1. the piston of large aluminum alloy extrusion casint and a foundry engieering thereof, is characterized in that piston press casting mould is by dynamic model master Core (1), fixing die (2), piston pin core (3), push rod (4), combustor core (5), hydraulic core_pulling device (6) Composition；Described mould is extrusion casint mould, the profile of Piston Casting；Described piston pin core (3), combustor core (5) By the upper each part figuration of fixing die (2)；The inner chamber of piston is then by dynamic model main core (1) figuration；Operation principle: piston pin Core (3) is driven by hydraulic core_pulling device (6), is in going-back position by piston pin in Operational preparation stage hydraulic core_pulling device (6) Core (3) only has in the cavity that pommel is exposed to fixing die (2)；And constitute combustor core (5) and have auxiliary push-rod (4) concurrently The effect of Piston Casting is released from fixing die (2)；Extrution casting technique is as follows: dynamic fixed two parts of mould are respectively arranged in On the bolster of extrusion casting machine, and maintain a certain distance；Mechanical hand dips quantitative molten aluminium alloy, pours into snakelike funnel Flow into the cavity of fixing die (2) with mild state, dynamic model main core (1) is pressed down immediately, enters aluminium alloy liquid level And allowing it be gradually increasing until aluminum liquid is full of the near closed hollow ring that active and inactive mold is constituted, the ratio crimping used in the process is near 100MPa, and pressurize a period of time, liquid aluminium alloy solidifies the most under stress, now with the pinch confinement die cavity of aluminum alloy melt Volume slightly reduce；The alloy being meanwhile close to fixing die (2) and dynamic model main core (1) quickly condenses formation one The shell of individual progressive additive, presses under the higher continuation quickly hindering dynamic model main core (1) of its structural strength, and shell now i.e. possesses The elementary contour of profile in Piston Casting.