CN114871415B

CN114871415B - Vacuum casting machine is used in hydraulic cylinder alloy part processing

Info

Publication number: CN114871415B
Application number: CN202210384194.4A
Authority: CN
Inventors: 孙兆勇; 孙磊; 陈宁; 张宁
Original assignee: Xuzhou Jinding Hengli Hydraulic Parts Co ltd
Current assignee: Xuzhou Jinding Hengli Hydraulic Parts Co ltd
Priority date: 2022-04-13
Filing date: 2022-04-13
Publication date: 2023-03-24
Anticipated expiration: 2042-04-13
Also published as: CN114871415A

Abstract

The invention relates to the technical field of vacuum casting, and discloses a vacuum casting machine for machining a hydraulic cylinder alloy part, which comprises a furnace shell, wherein a movable cavity I is formed in the middle of the furnace shell, uniformly distributed air injection channels are formed in the top of the furnace shell, an impact column is movably sleeved in the air injection channels, a hinge ball is hinged to the center of the bottom end of the movable cavity I, a magnet layer is hinged to the top of the hinge ball, a crucible furnace is fixedly connected to the top end of the magnet layer, and a heat insulation layer is fixedly sleeved on the outer side of the crucible furnace. According to the invention, through the designed hinge ball, the crucible furnace, the magnet layer and the induction coil, when alternating current passes through the induction coil to form an alternating magnetic field, the magnet layer is attracted and repelled by the alternating magnetic field to have a tendency of approaching and departing from the alternating magnetic field, and meanwhile, due to the limitation of the hinge ball, the magnet layer drives the crucible furnace to rapidly shake through the hinge ball, so that alloy materials in the molten pool cavity are rapidly and uniformly mixed under high-frequency shaking.

Description

Vacuum casting machine is used in hydraulic cylinder alloy part processing

Technical Field

The invention relates to the technical field of vacuum casting, in particular to a vacuum casting machine for machining an alloy part of a hydraulic cylinder.

Background

The vacuum casting machine is a vacuum treatment device integrating material smelting, a vacuum device, a sand mold treatment device, cooling treatment, a casting system and the like, and is mainly characterized in that the whole system is pumped into a low-pressure state through the vacuum device, so that metal is smelted and cast in a state close to vacuum, the gas content in the smelted material is reduced, the metal is prevented from being oxidized, and the casting quality is improved.

When the alloy part of the hydraulic oil cylinder is subjected to vacuum casting, the alloy is mostly smelted by adopting an induction furnace, wherein the induction furnace is formed by winding an induction coil on the outer side of a crucible furnace, the high-frequency alternating current in the crucible furnace forms an alternating magnetic field around the crucible furnace, so that the material in the crucible furnace generates electric potential in the alternating magnetic field to form eddy current, and the heating and melting are completed.

However, in the existing induction furnace, a plurality of metal materials are directly put into the crucible furnace, so that the materials can only be slowly heated and melted by the vortex generated by the materials, the melting speed is slow, after the materials are melted into liquid, the impurities in the materials are gasified and the gas existing in the metals is accumulated and pressed in the molten materials, the gas volatilization is slow, the volatilization of the gas is insufficient, and the quality of castings is not ideal.

Disclosure of Invention

The vacuum casting machine has the advantages that a magnet layer is influenced by an alternating magnetic field to drive the crucible furnace to vibrate at high frequency, the crucible furnace drives materials in the crucible furnace to vibrate and mix at high frequency, the crucible furnace tilts to incline the materials, the magnetic flux of the materials is improved, vortex and gravity balls rotate and vibrate synchronously, an extrusion plate vibrates at high speed to impact the materials, the materials are impacted by vibration waves provided by a multi-directional vibration source to generate internal vibration waves, the space size of four spaces is changed continuously by the rotation of the extrusion plate, the materials overflow out of small spaces to form a thin flowing state, and the gas accumulated in the materials is discharged quickly.

The invention provides the following technical scheme: the utility model provides a vacuum casting machine is used in hydraulic cylinder alloy part processing, includes the stove outer covering, movable chamber I has been seted up at the middle part of stove outer covering, the jet-propelled passageway of equipartition is seted up at the top of stove outer covering, the striking post has been cup jointed in the jet-propelled passageway activity, the bottom center in movable chamber I articulates there is the hinge ball, the top of hinge ball articulates there is the magnet layer, the top fixedly connected with crucible furnace on magnet layer, the outside of crucible furnace is fixed to be cup jointed the heat preservation, the outside winding of heat preservation has induction coil, the molten bath chamber has been seted up in the crucible furnace, the bottom fixedly connected with symmetrical fixed partition in molten bath chamber, the bottom center activity in molten bath chamber has been cup jointed the rotor roll, the outside fixedly connected with symmetrical stripper plate of rotor roll, the bottom fixedly connected with connecting rod of rotor roll, the one end fixedly connected with gravity ball of connecting rod, movable chamber II has been seted up to the bottom of crucible furnace.

Preferably, the impact column is provided with a limiting sealing bulge, the air injection channel is communicated with a high-pressure air injection device to form a loop, and the high-pressure air injection device is controlled by a program.

Preferably, a water-cooling coil is fixedly sleeved at the joint of the magnet layer and the crucible furnace, and the water-cooling coil is communicated with a cooling system.

Preferably, the gap between the induction coil and the heat insulation layer is larger than ten centimeters, the induction coil is communicated with the alternating circuit, and the induction coil is of a hollow structure and is communicated with the cooling system.

Preferably, the bottom end of the extrusion plate and one end far away from the rotating roller are both attached to the inner wall of the molten pool cavity.

Preferably, the bottom of the rotating roller penetrates into the movable cavity II, the bottom of the rotating roller is fixedly sleeved with a limiting ring, the top end of the limiting ring is attached to the top end of the movable cavity II, and the top end of the limiting ring is subjected to sealing treatment.

The invention has the following beneficial effects:

1. according to the invention, through the designed hinge ball, the crucible furnace, the magnet layer and the induction coil, when alternating current passes through the induction coil to form an alternating magnetic field, the magnet layer is attracted and repelled by the alternating magnetic field to have a tendency of approaching and departing from the alternating magnetic field, and meanwhile, due to the limitation of the hinge ball, the magnet layer drives the crucible furnace to rapidly shake through the hinge ball, so that alloy materials in the molten pool cavity are rapidly and uniformly mixed under high-frequency shaking.

2. According to the invention, through the designed hinged ball, the crucible furnace, the magnet layer, the induction coil, the gravity ball, the rotating roller and the extrusion plate, the crucible furnace is inclined to one side when being shaken at high frequency, so that the material in the molten pool cavity is shaken rapidly, the frequency of a cutting magnetic field in unit time is improved, and meanwhile, the staggered area of the material and the magnetic field is increased, thereby increasing the magnetic flux, strengthening vortex, accelerating the melting of the material, simultaneously enabling the gravity ball to rotate synchronously in the inclined direction and shake synchronously at high frequency, and enabling the rotating roller to drive the extrusion plate to extrude the material in the molten pool cavity at high frequency, so that the softened material is deformed under stress, and the molten material is vibrated at high frequency, is staggered with the vibration provided by the crucible furnace, and the rapid mixing of the material is improved again.

3. According to the invention, through the designed air injection channel, the impact column, the extrusion plate and the fixed partition plate, an intelligent program is set, high-pressure air is injected through the air injection channel within a certain time interval, the impact column impacts the inclined crucible furnace, the crucible furnace is stressed to incline towards the other side, so that the gravity ball rotates again, the extrusion plate is driven by the rotating roller to rotate towards the other side, the size of a space formed by the extrusion plate and the fixed partition plate is changed intermittently, deformed softened materials are inclined in the process, the staggered area of the deformed softened materials and an alternating magnetic field is increased, the magnetic flux is increased, eddy current is enhanced, the melting of the materials is accelerated, meanwhile, the melted materials overflow from the small space which is gradually reduced to the space which is gradually increased from the upper part due to the extrusion of the extrusion plate, the melted materials form a flowing state on the extrusion plate and the fixed partition plate, the spreading area of the melted materials is increased, the thickness of the melted materials is reduced, and gasified impurities in the melted materials can be quickly separated under a low-pressure environment.

Drawings

FIG. 1 is a schematic view of the furnace shell structure of the present invention;

FIG. 2 is a schematic view of an induction coil according to the present invention;

FIG. 3 is a schematic view of the crucible furnace structure of the present invention;

FIG. 4 is a schematic structural distribution diagram of the impact beam of the present invention.

In the figure: 1. a furnace shell; 2. a movable cavity I; 201. an air injection passage; 3. an impact post; 4. hinging the ball; 5. a magnet layer; 6. a crucible furnace; 7. a molten bath cavity; 8. a heat-insulating layer; 9. an induction coil; 10. a water-cooled coil pipe; 11. fixing the partition plate; 12. a rotating roller; 121. a limiting ring; 13. a compression plate; 14. a movable cavity II; 15. a connecting rod; 16. a gravity ball.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 4, a vacuum casting machine for processing an alloy part of a hydraulic cylinder comprises a furnace shell 1, wherein a movable cavity i 2 is formed in the middle of the furnace shell 1, gas injection channels 201 are uniformly distributed on the top of the furnace shell 1, impact columns 3 are movably sleeved in the gas injection channels 201, limiting sealing protrusions are arranged on the impact columns 3, the gas injection channels 201 are communicated with a high-pressure gas injection device to form a loop, the high-pressure gas injection device is controlled by a program, so that the impact columns 3 are extruded and retracted into the gas injection channels 201 when a crucible furnace 6 is in an inclined state, and when an interval time set by the program is up, the high-pressure gas injection device can inject high-pressure gas to act on the impact columns 3, so that the impact columns 3 push the crucible furnace 6 to incline towards the other side.

Referring to fig. 2 to 3, the bottom center of activity chamber I2 articulates there is articulated ball 4, the top of articulated ball 4 articulates there is magnet layer 5, the top fixedly connected with crucible stove 6 of magnet layer 5, the fixed cover of the junction of the two has connect water-cooling coil pipe 10, water-cooling coil pipe 10 and cooling system switch-on make water-cooling coil pipe 10 cool down magnet layer 5 and handle, avoid high temperature to lead to the demagnetization of magnet layer 5, make magnet layer 5 unable and alternating magnetic field to interact, accomplish the high-frequency vibration of crucible stove 6.

Referring to fig. 2 to 4, an insulating layer 8 is fixedly sleeved on the outer side of the crucible furnace 6, an induction coil 9 is wound on the outer side of the insulating layer 8, a gap between the induction coil 9 and the insulating layer 8 is larger than ten centimeters, so that the crucible furnace 6 can have enough space to perform inclined movement in different directions, the induction coil 9 is communicated with an alternating circuit, alternating current flows in the induction coil 9, an alternating magnetic field is formed around the coil, alloy materials in the molten pool cavity 7 generate induction potential under the alternating magnetic field to form eddy current for heating and melting, the induction coil 9 is of a hollow structure and is communicated with a cooling system, so that the induction coil 9 is cooled, and overheating and melting are avoided.

Referring to fig. 3 to 4, a melting bath cavity 7 is formed in a crucible furnace 6, symmetrical fixed partition plates 11 are fixedly connected to the bottom of the melting bath cavity 7, a rotating roller 12 is movably sleeved at the center of the bottom of the melting bath cavity 7, symmetrical extrusion plates 13 are fixedly connected to the outer sides of the rotating roller 12, the bottom ends of the extrusion plates 13 and one ends far away from the rotating roller 12 are both attached to the inner wall of the melting bath cavity 7, so that the extrusion plates 13 and the fixed partition plates 11 form four melting spaces, the extrusion plates 13 are driven by a gravity ball 16 to vibrate at a high speed, the extrusion plates 13 extrude and collide materials in the four spaces, the materials in the four spaces are deformed and vibrated, and the high-frequency vibration provided by the crucible furnace 6 to the materials is matched, so that vibration waves in different directions are generated inside the materials to collide, the materials are rapidly mixed, meanwhile, in multiple reversing rotations of the extrusion plates 13, the original large spaces in the four spaces are gradually reduced, the original small spaces are gradually increased, the melted materials in the reduced spaces are rapidly extruded by the extrusion plates 13 and the self high-frequency vibration, the original large spaces are formed in the melting environment, and the melted materials overflowing in which the low-pressure of the melted materials are increased, and the evaporated materials.

Referring to fig. 3 to 4, a movable cavity ii 14 is formed at the bottom of the crucible furnace 6, the bottom of the rotating roller 12 penetrates into the movable cavity ii 14, a limiting ring 121 is fixedly sleeved at the bottom of the rotating roller 12, the top end of the limiting ring 121 is attached to the top end of the movable cavity ii 14, the top end of the limiting ring 121 is sealed to limit the position of the rotating roller 12 and avoid leakage, a connecting rod 15 is fixedly connected to the bottom of the rotating roller 12, and a gravity ball 16 is fixedly connected to one end of the connecting rod 15, so that the gravity ball 16 can move in an inclined direction under gravity in the process of rotating and inclining the crucible furnace 6, so as to drive the rotating roller 12 to synchronously rotate, so that the extrusion plate 13 synchronously rotates, and the gravity ball 16 can rapidly reciprocate in a certain range under the high-frequency vibration of the crucible furnace 6, so that the extrusion plate 13 synchronously rotates, and fast materials in four spaces are processed, the gravity ball 16, the connecting rod 15, the rotating roller 12, the extrusion plate 13 and the fixed baffle 11 are all high-temperature resistant, and the problems that the gravity ball 16, the connecting rod 15, the rotating roller 12, the fixed baffle 13 and the high-temperature baffle 11 melt down are avoided.

The use method (working principle) of the invention is as follows:

firstly, setting time intervals of high-pressure gas sprayed into a gas spraying channel 201 according to actual conditions, then putting materials into four spaces formed by a fixed partition plate 11 and an extrusion plate 13 at the bottom of a molten pool cavity 7 in a vacuum state, introducing alternating current into an induction coil 9, starting a cooling system, enabling cooling water to flow in the induction coil 9 to carry out cooling treatment, enabling the cooling water to flow in a water-cooling coil 10, carrying out cooling treatment on a magnet layer 5, enabling a crucible furnace 6 to incline to one side under the influence of gravity, enabling the top of the crucible furnace 6 to lean against the top of a movable cavity I2 and be attached to one of impact columns 3, enabling the impact column 3 to be contracted into the gas spraying channel 201 at the position under the extrusion of the crucible furnace 6, enabling a gravity ball 16 to move towards the inclined direction, enabling the gravity ball to drive a rotating roller 12 to synchronously rotate through a connecting rod 15, enabling the extrusion plate 13 to rotate and extrude the materials in the space in the rotating direction, enabling the volume of the extrusion plate 13 of the other two spaces to be increased, and enabling the rotation amplitude to not to be greatly changed due to the influence of the extrusion plate 13 on the unmelted materials;

then, alternating current in the induction coil 9 causes an alternating magnetic field to be formed around the material in the molten pool cavity 7, eddy current is formed, and the alternating magnetic field gradually heats and melts, at this time, due to the rapid change of the magnetic field direction, the alternating magnetic field attracts and repels the magnet layer 5, so that the magnet layer 5 has a tendency of approaching to and departing from the alternating magnetic field, the hinge ball 4 receives the tendency to drive the crucible furnace 6 to rapidly vibrate, so that the material in the four spaces is synchronously vibrated, meanwhile, the gravity ball 16 is vibrated in a reciprocating manner under vibration, so that the extrusion plate 13 rotates in a reciprocating manner, so that the extrusion plate 13 performs high-frequency impact on the material, the frequency of the cutting magnetic field in unit time of the material is increased, then the material is gradually softened under the influence of the eddy current, at this time, the impact of the extrusion plate 13 deforms the softened material, when the set air injection time is up, high-pressure air is injected into the air injection channel 201 into which the impact column 3 retracts, so that the high-pressure air pushes the crucible furnace 6 through the impact column 3 to incline towards the other side with the hinge ball 4 as a hinge point, so that the gravity ball 16 synchronously rotates, the extrusion plate 13, the original small spaces are synchronously, the original spaces are gradually rotated, the original small spaces are gradually, the original large spaces are gradually, the area of the alternating magnetic field is gradually reduced, and the alternating magnetic field is gradually increased, so that the alternating magnetic field is gradually cut material, and the alternating magnetic field is strengthened;

finally, after the materials in the four spaces are completely melted, the vibrating crucible furnace 6 and the vibrating extrusion plate 13 enable the melting materials to obtain the vibration source influence in multiple directions and generate high-frequency impact vibration in the melting materials, so that the alloy materials are quickly mixed, when the crucible furnace 6 inclines to the other side again, the extrusion plate 13 rotates again, the original large space in the four spaces is gradually reduced, the original small space is gradually increased, the melting materials in the reduced spaces are quickly extruded by the extrusion plate 13 and overflow from the top ends of the extrusion plate 13 and the fixed partition plate 11 under the high-frequency vibration of the extrusion plate 13, the overflowing melting materials are formed into film sheets on the partition plates and enter the increased space, the gasified impurities in the melting materials are quickly volatilized in a low-pressure environment, then, after the alloy melting and mixing reach the standard, heat preservation treatment is carried out, and subsequent casting can be carried out in a vacuum environment.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a vacuum casting machine is used in hydraulic cylinder alloy part processing, includes stove outer covering (1), its characterized in that: activity chamber I (2) have been seted up at the middle part of stove outer covering (1), the jet-propelled passageway (201) of equipartition has been seted up at the top of stove outer covering (1), striking post (3) have been cup jointed in jet-propelled passageway (201) internalization, the bottom center in activity chamber I (2) articulates there is articulated ball (4), the top of articulated ball (4) articulates there is magnet layer (5), the top fixedly connected with crucible stove (6) of magnet layer (5), the fixed cover in the outside of crucible stove (6) has cup jointed heat preservation (8), the outside winding of heat preservation (8) has induction coil (9), seted up molten bath chamber (7) in crucible stove (6), the bottom fixedly connected with symmetrical fixed partition plate (11) of molten bath chamber (7), the bottom center activity in molten bath chamber (7) has cup jointed rotor roll (12), the stripper plate (13) of the outside fixedly connected with symmetry of rotor roll (12), the bottom fixedly connected with connecting rod (15) of rotor roll (12), the one end fixedly connected with connecting rod (15) the one end fixedly connected with gravity ball (16) the crucible stove (14) have seted up the bottom of crucible stove (II).

2. The vacuum casting machine for processing the alloy part of the hydraulic oil cylinder according to claim 1, characterized in that: the impact column (3) is provided with a limiting sealing bulge, the air injection channel (201) is communicated with a high-pressure air injection device to form a loop, and the high-pressure air injection device is controlled by a program.

3. The vacuum casting machine for processing the alloy part of the hydraulic oil cylinder according to claim 1, characterized in that: the joint of the magnet layer (5) and the crucible furnace (6) is fixedly sleeved with a water-cooling coil (10), and the water-cooling coil (10) is communicated with a cooling system.

4. The vacuum casting machine for processing the alloy part of the hydraulic oil cylinder according to claim 1, characterized in that: the gap between the induction coil (9) and the heat insulation layer (8) is larger than ten centimeters, the induction coil (9) is communicated with the alternating circuit, and the induction coil (9) is of a hollow structure and is communicated with a cooling system.

5. The vacuum casting machine for processing the alloy part of the hydraulic oil cylinder according to claim 1, characterized in that: the bottom end of the extrusion plate (13) and one end far away from the rotating roller (12) are attached to the inner wall of the molten pool cavity (7).

6. The vacuum casting machine for processing the alloy part of the hydraulic oil cylinder according to claim 1, characterized in that: the bottom of the rotating roller (12) penetrates into the movable cavity II (14), the bottom of the rotating roller (12) is fixedly sleeved with a limiting ring (121), the top end of the limiting ring (121) is attached to the top end of the movable cavity II (14), and the top end of the limiting ring (121) is sealed.