CN112974792A

CN112974792A - Double-mold casting machine for casting aluminum piston blank by transversely pulling core and using method thereof

Info

Publication number: CN112974792A
Application number: CN202110195425.2A
Authority: CN
Inventors: 杨良强; 单茂鹏; 许家峰; 牟永祥
Original assignee: Shandong Evolver New Material Co ltd
Current assignee: Shandong Evolver New Material Co ltd
Priority date: 2021-02-20
Filing date: 2021-02-20
Publication date: 2021-06-18

Abstract

The invention relates to a double-mold casting machine for casting an aluminum piston blank by transversely pulling cores and a using method thereof, belonging to the technical field of piston manufacturing. The casting machine comprises a pouring system, a truss workpiece taking mechanical arm, a joint pouring robot, a hydraulic system, an electric operating system and a quenching cooling box, wherein the truss workpiece taking mechanical arm is arranged above the pouring system, the joint pouring robot is arranged on the truss workpiece taking mechanical arm, the joint pouring robot extracts molten aluminum and pours the molten aluminum into the pouring system, the quenching cooling box is arranged below one side of the truss workpiece taking mechanical arm, the truss workpiece taking mechanical arm clamps a piston blank poured out by the pouring system to the quenching cooling box, the pouring system is connected to the hydraulic system, and the hydraulic system, the truss workpiece taking mechanical arm and the joint pouring robot are all connected to the electric operating system. The invention realizes the automatic operation of pouring and quenching of the piston blank, improves the production efficiency, and simultaneously improves the mechanical property and the thermal fatigue resistance of the piston.

Description

Double-mold casting machine for casting aluminum piston blank by transversely pulling core and using method thereof

Technical Field

The invention relates to a double-mold casting machine for casting an aluminum piston blank by transversely pulling cores and a using method thereof, belonging to the technical field of piston manufacturing.

Background

Along with the explosion pressure of the engine exceeding 20MPa, the gas temperature exceeds 400 ℃, the requirements of the high-temperature and high-pressure working environment on the internal combustion engine are more strict, the overall performance of the internal combustion engine is improved mainly by the improvement of key parts, and a piston is used as a heart part of the internal combustion engine, thereby playing a vital role in the whole working process of the engine and the aspect of exhaust emission.

Piston casting machine on the existing market mainly includes the machine body, the electrical system, hydraulic system and cooling system, the pouring mode is that the operator pours aluminium liquid into a mould by hand, get the piston blank by hand and quench and cool off, then take out the piston blank from the quenching case and place the frame, frequent operation leads to workman intensity of labour big, low in production efficiency, the yield is low, and the piston blank head top surface central area that casts is the regional thickness of combustion chamber, make piston blank head cooling slow, the grain structure that forms is thick, the metallographic structure is poor, influence the mechanical properties and the thermal fatigue resistance performance of piston.

Chinese patent document CN109332668B discloses an automatic piston casting process, which comprises the steps of mounting a filter screen, pressing a salt core, mounting an inlaid ring, closing a die, casting and taking a piece, wherein each step is completed by means of an automatic piston casting device. The process can only pour one piston blank at a time, has low production efficiency, and cannot solve the technical problems of slow cooling of the head of the piston blank, large grain structure and poor metallographic structure.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the double-mold casting machine for casting the aluminum piston blank by transversely pulling the core, which realizes the automatic operation of casting and quenching of the piston blank, improves the production efficiency, and simultaneously improves the mechanical property and the thermal fatigue resistance of the piston.

The invention also provides a use method of the double-mold casting machine for casting the aluminum piston blank by transversely pulling the core.

The technical scheme of the invention is as follows:

a double-mold casting machine for casting aluminum piston blanks by transverse core pulling comprises a casting system, a truss piece taking manipulator, a joint casting robot, a hydraulic system, an electric operating system and a quenching cooling box, wherein,

a truss piece taking mechanical arm is arranged above the pouring system, a joint pouring robot is arranged on the truss piece taking mechanical arm, the joint pouring robot extracts aluminum liquid and pours the aluminum liquid into the pouring system, a quenching cooling box is arranged below one side of the truss piece taking mechanical arm, the truss piece taking mechanical arm clamps a piston blank poured out by the pouring system to the quenching cooling box, the pouring system is connected to a hydraulic system, and the hydraulic system, the truss piece taking mechanical arm and the joint pouring robot are all connected to an electrical operation system.

Preferably, the pouring system comprises a base and a frame, the frame is arranged on the base, 4 outer die bases are arranged on two sides of the frame respectively, 2 clamping spaces are formed by the 4 outer die bases, a left die and a right die are clamped respectively, an outer die telescopic oil cylinder is connected to one side of the left die through a cylindrical guide rail, a middle core telescopic oil cylinder is connected to the back side of the left die through a cylindrical guide rail, an outer die telescopic oil cylinder is connected to one side of the right die through a cylindrical guide rail, a middle core telescopic oil cylinder is connected to the back side of the right die through a cylindrical guide rail, linear guide rails are arranged on two sides of the lower end of the frame respectively, a top die base is arranged on the linear guide rails, an upper oil cylinder and a lower oil cylinder of the top die are arranged at the lower end of the top die, the top die base is driven to move.

Preferably, the left mold comprises a mold A, a mold B, a mold C and a mold D, the mold A and the mold B are fixedly arranged on an outer mold base, the outer mold base is connected with an outer mold telescopic oil cylinder through a cylindrical guide rail, the outer mold base connected with the mold A is fixedly arranged on the frame, the mold C is connected with a middle core telescopic oil cylinder through a middle core mold base and the cylindrical guide rail, the mold D is connected with a top mold telescopic oil cylinder through the cylindrical guide rail, the shape of a casting cavity formed by closing the mold A, the mold B, the mold C and the mold D is of a piston shape, and the right mold is identical to the left.

Further preferred, mould D one side sets up the runner, the runner is connected to the pouring cavity through vertical pouring gate and horizontal pouring gate, the horizontal pouring gate extends to mould A through mould D, pouring cavity one side sets up the benefit throat, the import symmetry that the benefit throat got into the pouring cavity with aluminium liquid sets up, it is more steady to make the pouring, the piston solidification position after the pouring is at the horizontal pouring gate and the contact surface of benefit throat and piston, the combustion chamber at piston top can not appear, the cooling rate at piston top has been accelerated, make the crystalline grain tissue tiny, the metallographic structure is good.

Preferably, the top surface junction of mould A and mould B sets up the recess, sets up the hoop in the recess.

Preferably, set up the cooling water course in left mould and the right mould respectively, cool down through letting in the cooling water for the blank cooling, set up the cooling water course in outer die holder, top die holder and the well die holder, avoid heat conduction to frame and hydro-cylinder, influence life, set up flow sensor and solenoid valve in the external pipeline of cooling water course, control the flow and the time that let in the cooling water, guarantee that every position cools off evenly.

Preferably, the base is provided with a suction device, and the suction devices are respectively connected to the left die and the right die.

Preferably, set up temperature detector on left mould and the right mould, temperature detector is connected to electric operating system, through temperature detector real-time detection left mould and right mould temperature, reports to the police when the temperature is not up to standard.

Preferably, the frame both ends are installed in the base through the pivot, and the frame rear side is through verting the hydro-cylinder and connecting the base, through verting the hydro-cylinder and driving the frame slope, and the convenient pouring is put to the adjustment runner position.

Preferably, the manipulator is got to the truss includes the truss, the crossbeam, erect the roof beam, the upset wrist, the bottom plate, motor A and motor B, evenly set up 2 linear guide on the truss, set up the rack on 2 linear guide intermediate positions, the crossbeam passes through motor A and gear connection in rack one side, perpendicular roof beam is connected to crossbeam one end, it sets up the nipper to erect roof beam lower extreme perpendicular to crossbeam, the nipper both sides set up the upset wrist respectively, the upset wrist is connected and is held in hand, the bottom plate passes through motor B and gear connection in rack opposite side, set up joint pouring robot on the bottom plate, motor A, motor B, the upset wrist is held in hand and is connected to electric operating system.

Preferably, the joint pouring robot comprises a rotating base, a rotating arm and a pouring ladle, wherein the rotating arm is arranged on the rotating base, 2 pouring ladles are connected to the rotating arm, the rotating base rotates after the rotating arm bends to extract aluminum liquid, the pouring ladle is moved to the position above pouring gates of the left mold and the right mold, and the rotating arm tilts to pour the aluminum liquid into the left mold and the right mold.

Further preferably, a temperature detection rod and a liquid level detection rod are respectively arranged on the rotating arm in the middle of the 2 casting ladles, the temperature detection rod detects the temperature of the aluminum liquid in the aluminum liquid furnace, the robot stops working when the temperature is too high or too low, the quality of the piston blank is prevented from being influenced, the liquid level detection rod is used for detecting the relative height of the liquid level of the aluminum liquid in the aluminum liquid furnace, along with continuous casting of the blank, the liquid level height of the aluminum liquid in the aluminum liquid furnace is reduced, the height of the rotating arm extending into the aluminum liquid furnace is adjusted, and the weight of the aluminum liquid.

The use method of the double-mold casting machine for casting the aluminum piston blank by the transverse core pulling comprises the following operation steps:

(1) electric operating system and hydraulic system start, and left side mould and right mould are closed, set up salt core and hoop in left side mould and the right mould respectively:

(2) the joint pouring robot stretches the pouring ladle into the aluminum liquid furnace through the rotating arm, the rotating arm drives the pouring ladle to rotate to extract aluminum liquid, and then the pouring ladle pours the aluminum liquid into pouring cavities of the left mold and the right mold respectively;

(3) after pouring, water is introduced into the left die and the right die for cooling, then the truss workpiece taking manipulator takes out the piston blank, the piston blank is tilted by 90 degrees, the head of the piston blank is arranged on the upper side, the skirt part is arranged on the lower side, the piston blank is placed in a quenching cooling box for cooling, and after quenching treatment, the piston blank is placed in a blank frame to complete casting of the piston blank.

The invention has the beneficial effects that:

1. the invention realizes the automatic operation of pouring and quenching of the piston blank, improves the production efficiency, simultaneously leads the aluminum liquid to be poured in an inertia way under the action of gravity, leads the aluminum liquid to be filled in the pouring cavity from bottom to top, avoids the influence of air gaps of plane pouring, avoids generating air holes, adjusts the feeding position of the piston blank to the side surface, avoids influencing the performance of a piston combustion chamber, leads the grain structure of the cast piston blank to be fine and have good metallographic structure, avoids generating air holes and sand holes, and improves the mechanical performance and the thermal fatigue resistance of the piston blank.

2. The feeding mechanism of the invention adopts the independent cylindrical guide rail, thereby reducing the abrasion and having smooth movement.

3. The invention is provided with the temperature detection rod which detects the temperature of the aluminum liquid in the aluminum liquid furnace, and the robot stops working when the temperature is too high or too low, thereby avoiding influencing the quality of the piston blank.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the gating system of the present invention;

FIG. 3 is a front view of the gating system of the present invention;

FIG. 4 is a top view of the gating system of the present invention;

FIG. 5 is a side view of the runner system of the present invention;

FIG. 6 is a schematic structural view of a truss pick-off robot of the present invention;

FIG. 7 is a schematic structural diagram of a joint casting robot according to the present invention;

FIG. 8 is a schematic view of a left mold section;

wherein: 1. a pouring system; 2. a quenching cooling box; 3. an electrical operating system; 4. a piston blank; 5. a truss pick-off manipulator; 6. a joint casting robot; 7. a hydraulic system; 8. an outer die holder; 9. a central core die holder; 10. a top die holder; 11. a suction device; 12. a left mold; 13. a right mold; 14. an external mold telescopic oil cylinder; 15. a central core telescopic oil cylinder; 16. a top die telescopic oil cylinder; 17. an upper oil cylinder and a lower oil cylinder of the top die; 18. a base; 19. a frame; 20. a truss; 21. grasping by hand; 22. the wrist is turned over; 23. erecting a beam; 24. a cross beam; 25. a linear guide rail; 26. a rack; 27. a base plate; 28. a motor A; 29. a motor B; 30. a rotating arm; 31. ladle pouring; 32. a temperature detection bar; 33. rotating the base; 34. a mold A; 35. a mold B; 36. a mold C; 37. a mold D; 38. a gate; 39. a vertical pouring channel; 40. a horizontal pouring channel; 41. a tilting cylinder; 42. a necking is supplemented; 43. a liquid level detection rod.

Detailed Description

The present invention will be further described by way of examples, but not limited thereto, with reference to the accompanying drawings.

Example 1:

as shown in fig. 1-8, the present embodiment provides a dual-mold casting machine for transverse core-pulling casting of aluminum piston blanks, which comprises a casting system 1, a truss member-taking manipulator 5, a joint casting robot 6, a hydraulic system 7, an electric operating system 3 and a quenching cooling tank 2, wherein,

a truss is arranged above the pouring system 1, a manipulator 5 is arranged above the truss, a joint pouring robot 6 is arranged on the truss, the joint pouring robot 6 extracts molten aluminum to pour into the pouring system 1, a quenching cooling box 2 is arranged below one side of the truss, the truss is arranged on the manipulator 5 to clamp a piston blank 4 poured out by the pouring system to the quenching cooling box 2, the pouring system 1 is connected to a hydraulic system 7, and the hydraulic system, the truss, the manipulator and the joint pouring robot are all connected to an electric operating system.

The pouring system 1 comprises a base 18 and a frame 19, the frame 19 is arranged on the base 18, 4 outer die seats 8 are respectively arranged on two sides of the frame 19, 2 clamping spaces are formed by the 4 outer die seats 8 and respectively clamp a left die 12 and a right die 13, one side of the left die 12 is connected with an outer die telescopic oil cylinder 14 through a cylindrical guide rail, the back side of the left die 12 is connected with a central core telescopic oil cylinder 15 through the cylindrical guide rail, one side of the right die 13 is connected with the outer die telescopic oil cylinder 14 through the cylindrical guide rail, the back side of the right die 13 is connected with the central core telescopic oil cylinder 15 through the cylindrical guide rail, linear guide rails are respectively arranged on two sides of the lower end of the frame 19, a top die seat 10 is arranged on, the top die base 10 is driven to move up and down by the stretching of the top die upper and lower oil cylinders 17, a top die telescopic oil cylinder 16 is arranged on the upper side of the top die base 10, and the top die telescopic oil cylinder 16 is connected to the left die 12 and the right die 13 through cylindrical guide rails respectively.

Set up the cooling water course in left mould 12 and the right mould 13 respectively, cool down through letting in the cooling water for the blank cooling, set up the cooling water course in outer die holder, top die holder and the well die holder, avoid heat conduction to frame and hydro-cylinder, influence life, set up flow sensor and solenoid valve in the external pipeline of cooling water course, the control lets in the flow and the time of cooling water, guarantees that every position cooling is even.

Set up temperature detector on left mould 12 and the right mould 13, temperature detector is connected to electric operating system, through temperature detector real-time detection left mould and right mould temperature, reports to the police when the temperature is not up to standard.

The truss workpiece taking machine 5 hand comprises a truss 20, a cross beam 24, a vertical beam 23, a turnover wrist 22, a bottom plate 27, a motor A28 and a motor B29, 2 linear guide rails 25 are uniformly arranged on the truss 20, a rack 26 is arranged in the middle of each 2 linear guide rails 25, the cross beam 24 is connected to one side of the rack 26 through a motor A28 and a gear, the vertical beam 23 is connected to one end of the cross beam 24, a grabbing plate is arranged at the lower end of the vertical beam 23 and perpendicular to the cross beam, the turnover wrists 22 are respectively arranged on two sides of the grabbing plate, the turnover wrists 22 are connected to a grab 21, the bottom plate 27 is connected to the other side of the rack through a motor B29 and a gear, a joint pouring robot is arranged on the bottom plate, and the. The flip wrist and grip are conventional equipment for a truss pick manipulator, commercially available.

The joint pouring robot 6 comprises a rotating base 33, a rotating arm 30 and a pouring ladle 31, wherein the rotating arm 30 is arranged on the rotating

base

33, 2 pouring ladles 31 are connected to the rotating arm 30, the rotating base rotates after the rotating arm 30 bends and extracts aluminum liquid, the pouring ladle is moved to the positions above pouring gates of a left mold and a right mold, the rotating arm tilts, and the aluminum liquid is poured into the left mold and the right mold. The rotating arm is a conventional device used for a joint casting robot and is commercially available.

Example 2:

the structure of the double-mold casting machine for casting the aluminum piston blank by pulling the core transversely is as described in embodiment 1, and the difference is that the left mold 12 comprises a mold A34, a mold B35, a mold C36 and a mold D34, the mold A34 and the mold B are fixedly arranged on an outer mold base 8, the outer mold base is connected with an outer mold telescopic oil cylinder through a cylindrical guide rail, the outer mold base connected with the mold A is fixedly arranged on a rack, the mold C36 is connected with a middle core telescopic oil cylinder through a middle core mold base and the cylindrical guide rail, the mold D37 is connected with a top mold telescopic oil cylinder 16 through the cylindrical guide rail, the shape of a casting cavity formed by closing the mold A34, the mold B35, the mold C36 and the mold D34 is the shape of a piston.

Mould D37 one side sets up runner 38, runner 38 is connected to the pouring cavity through vertical runner 39 and horizontal runner 40, horizontal runner 40 extends to mould A34 through mould D37, pouring cavity one side sets up the benefit throat 42, the import symmetry that the benefit throat 42 got into the pouring cavity with aluminium liquid sets up, as shown in fig. 8, make the pouring more steady, the piston solidification position after the pouring is at the contact surface of horizontal runner and benefit throat and piston, the combustion chamber at piston top can not appear, the cooling rate at piston top has been accelerated, make the grain structure tiny, the metallographic structure is good. The top surface junction of mould A and mould B sets up the recess, sets up the hoop in the recess, fixes salt core and piston blank through the hoop.

Example 3:

a double-mold casting machine for transversely loose-core casting aluminum piston blanks is structurally as described in embodiment 1, except that a base 18 is provided with a suction device 11, and the suction device 11 is respectively connected to a left mold 12 and a right mold 13. And gas generated by heating the salt core is absorbed by the air suction device, so that the porosity of the piston blank is reduced.

Example 4:

the utility model provides a bimodulus casting machine of horizontal loose core pouring aluminum piston blank, the structure is as embodiment 1, the difference lies in, and rack 19 both ends are installed in base 18 through the pivot, and the base is connected through tilting cylinder 41 in rack 19 rear side, drives the rack slope through tilting cylinder, and the adjustment runner position is conveniently poured.

Example 5:

the utility model provides a bimodulus casting machine of horizontal loose core pouring aluminum piston blank, the structure is as described in embodiment 1, the difference lies in, set up temperature detection stick 32 and liquid level detection stick 43 on the rocking arm 30 in the middle of 2 ladles 31 respectively, the temperature detects the aluminium liquid temperature in the stick detection aluminium liquid stove, the high or low robot stop work that crosses of temperature, avoid influencing piston blank quality, the liquid level detection stick is used for detecting the liquid level relative height of aluminium liquid in the aluminium liquid stove, along with constantly pouring the blank, the liquid level height of aluminium liquid descends in the aluminium liquid stove, the adjustment rocking arm stretches into aluminium liquid stove height, guarantee that the aluminium liquid weight that every time the ladles drawed equals.

Claims

1. a dual-die casting machine for transverse core-pulling and pouring aluminum piston blank, is characterized in that, comprises pouring system, truss pick-up manipulator, joint pouring robot, hydraulic system, electrical operating system and quenching cooling box, wherein,

A truss picking manipulator is set above the pouring system, a joint pouring robot is set on the truss picking manipulator, the joint pouring robot extracts molten aluminum and pours it into the pouring system, a quenching cooling box is set under one side of the truss picking manipulator, and the truss picking manipulator pours the pouring system The outgoing piston blank is clamped to the quenching cooling box, the pouring system is connected to the hydraulic system, and the hydraulic system, the truss picking manipulator and the joint pouring robot are all connected to the electrical operating system.

2. The dual-die casting machine for laterally pulling and pouring aluminum piston blanks as claimed in claim 1, wherein the pouring system comprises a base and a frame, a frame is provided on the base, and 4 outer molds are respectively provided on both sides of the frame 4 outer mold bases constitute 2 clamping spaces, respectively clamping the left mold and the right mold. The left mold side is connected to the outer mold telescopic cylinder through a cylindrical guide rail, and the left mold back side is connected to the central core telescopic cylinder through a cylindrical guide rail. , One side of the right mold is connected to the outer mold telescopic oil cylinder through a cylindrical guide rail, and the back side of the right mold is connected to the center core telescopic oil cylinder through a cylindrical guide rail. A top die upper and lower oil cylinder is arranged at the lower end, a top die telescopic oil cylinder is arranged on the upper side of the top die base, and the top die telescopic oil cylinder is respectively connected to the left die and the right die through cylindrical guide rails.

3. the double-die casting machine of transverse core pulling casting aluminum piston blank as claimed in claim 2, is characterized in that, left mould comprises mould A, mould B, mould C and mould D, and mould A and mould B are fixedly arranged on the outside. The mold base, the outer mold base is connected to the outer mold telescopic cylinder through the cylindrical guide rail, the outer mold base connected to the mold A is fixedly arranged on the frame, the mold C is connected to the central core telescopic oil cylinder through the center core mold base and the cylindrical guide rail, and the mold D is connected to the center core telescopic cylinder through the cylindrical guide rail. Shaped guide rail is connected to the top mold telescopic cylinder, the shape of the casting cavity after mold A, mold B, mold C and mold D are closed is the shape of the piston, and the structure of the right mold is the same as that of the left mold;

Preferably, a gate is set on one side of the mold D, the gate is connected to the casting cavity through the vertical runner and the horizontal runner, the horizontal runner extends to the mold A through the mold D, and a feeding port is set on one side of the casting cavity, and the feeding port It is arranged symmetrically with the inlet of the molten aluminum into the pouring cavity, and a groove is arranged at the connection between the top surfaces of the mold A and the mold B, and an iron ring is arranged in the groove.

4. The dual-die casting machine for laterally core-pulling and casting aluminum piston blanks as claimed in claim 3, wherein cooling water channels are respectively provided in the left die and the right die, and in the outer die base, the top die base and the middle core die base, respectively. Set up a cooling water channel, and set a flow sensor and a solenoid valve in the external pipeline of the cooling water channel.

5 . The dual-mold casting machine for laterally core-pulling and casting aluminum piston blanks as claimed in claim 2 , wherein a suction device is provided on the base, and the suction device is respectively connected to the left mold and the right mold. 6 .

6 . The dual-mold casting machine for laterally core-pulling and casting aluminum piston blanks as claimed in claim 2 , wherein a temperature detector is provided on the left mold and the right mold, and the temperature detector is connected to an electrical operating system. 7 .

7 . The dual-mold casting machine for laterally core-pulling and casting aluminum piston blanks as claimed in claim 2 , wherein both ends of the frame are mounted on the base through rotating shafts, and the rear side of the frame is connected to the base through a tilting oil cylinder. 8 .

8. The dual-die casting machine of horizontal core pulling and casting aluminum piston blank as claimed in claim 1, wherein the truss pick-up manipulator comprises a truss, a cross beam, a vertical beam, a turning wrist, a bottom plate, a motor A and a motor B, and the truss Two linear guide rails are evenly set on the top, and a rack is set in the middle of the two linear guide rails. The beam is connected to one side of the rack through the motor A and the gear. One end of the beam is connected to the vertical beam, and the lower end of the vertical beam is perpendicular to the beam. The flipping wrists are respectively set on both sides, and the flipping wrists are connected to the hand grip. The bottom plate is connected to the other side of the rack through the motor B and the gear. The joint casting robot is set on the bottom board. .

9. The dual-mold casting machine for laterally core-pulling and casting aluminum piston blanks as claimed in claim 4, wherein the joint casting robot comprises a rotating base, a rotating arm and a pouring scoop, the rotating base is provided with a rotating arm, and the rotating arm is connected to 2 spoons;

Preferably, a temperature detection rod and a liquid level detection rod are respectively set on the rotating arms in the middle of the two scoops.

10. a using method of the double-die casting machine of horizontal core pulling casting aluminum piston blank as claimed in claim 9, is characterized in that, operating steps are as follows:

(1) The electrical operating system and the hydraulic system are started, the left mold and the right mold are closed, and the salt core is set in the left mold and the right mold respectively;

(2) The joint pouring robot probes the pouring spoon into the molten aluminum furnace through the rotating arm, and the rotating arm drives the pouring spoon to rotate to extract the molten aluminum, and then the pouring spoon pours the molten aluminum into the pouring cavity of the left mold and the right mold respectively;

(3) After the pouring is completed, the left mold and the right mold are cooled by water, and then the truss pick-up manipulator takes out the piston blank, tilts the piston blank by 90°, so that the head of the piston blank is on the top and the skirt is on the bottom. Place it in the quenching cooling box After cooling, the piston blank is placed in the blank frame after quenching to complete the piston blank casting.