CN109590444B - Centrifugal casting equipment for hydraulic cylinder body - Google Patents
Centrifugal casting equipment for hydraulic cylinder body Download PDFInfo
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- CN109590444B CN109590444B CN201910012125.9A CN201910012125A CN109590444B CN 109590444 B CN109590444 B CN 109590444B CN 201910012125 A CN201910012125 A CN 201910012125A CN 109590444 B CN109590444 B CN 109590444B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/10—Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor, means for feeding molten metal, cleansing moulds, removing castings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/12—Controlling, supervising, specially adapted to centrifugal casting, e.g. for safety reasons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/09—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure
- B22D27/11—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure making use of mechanical pressing devices
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Abstract
The invention belongs to the technical field of centrifugal casting, and particularly relates to centrifugal casting equipment for a hydraulic cylinder body, which comprises a centrifugal casting tank, a casting roller and an operation module, wherein one end of the centrifugal casting tank is spirally connected with a front cover, and the other end of the centrifugal casting tank is spirally connected with a rear cover; a first cavity is formed in one side of the front cover, a first rotating disc is installed in the first cavity, and a second cavity is formed in one side of the transition piece; three groups of sliding grooves are formed in one side of the first rotary table and one side of the second rotary table at equal angles, the number of each group of sliding grooves is two, two sliding grooves in each group of sliding grooves are respectively located on one side of the first rotary table and one side of the second rotary table, and sliding blocks are connected inside the sliding grooves in a sliding mode; an operation module is arranged on the other side of the transition piece; the operation module comprises a connecting ball, a gripper, a connecting pipe and a push rod, the connecting ball is fixedly connected to the other side of the transition piece, the rear cover is of an annular structure, and the connecting pipe and the push rod penetrate through the rear cover; and a controller is arranged outside the centrifugal casting tank.
Description
Technical Field
The invention belongs to the technical field of centrifugal casting, and particularly relates to centrifugal casting equipment for a hydraulic cylinder body.
Background
The centrifugal casting is widely applied to casting of cylindrical pipe fittings, the mould rotates at high speed during casting, then the liquid metal is injected into the mould by utilizing a guide pipe, the liquid metal forms a workpiece under the action of centrifugal force, the liquid metal can well fill the mould in the radial direction and form the free surface of the casting due to the centrifugal motion, a cylindrical inner hole can be obtained without a core, and the removal of gas and impurities in the liquid metal is facilitated.
Disclosure of Invention
In order to make up the defects of the prior art, the invention provides centrifugal casting equipment for a cylinder body of a hydraulic cylinder. The invention is mainly used for solving the problem that the quality of the inner surface wall of the casting is poor when the centrifugal casting equipment is used for casting the casting.
The technical scheme adopted by the invention for solving the technical problems is as follows: the centrifugal casting equipment for the cylinder body of the hydraulic cylinder comprises a centrifugal casting tank, three casting rollers and an operation module, wherein one end of the centrifugal casting tank is spirally connected with a front cover, the other end of the centrifugal casting tank is spirally connected with a rear cover, a transition piece is embedded and connected in the centrifugal casting tank, the transition piece and the rear cover are positioned at the same end of the centrifugal casting tank, and the centrifugal casting tank is driven by a motor; a first cavity is formed in one side of the front cover, a first rotating disc is arranged in the first cavity, a second cavity is formed in one side of the transition piece, an annular groove is formed in the second cavity, a second rotating disc is arranged in the second cavity, and the second rotating disc is rotatably connected with the transition piece; three groups of sliding grooves are formed in one side of the first rotary table and one side of the second rotary table at equal angles, the number of each group of sliding grooves is two, two sliding grooves in each group of sliding grooves are respectively located on one side of the first rotary table and one side of the second rotary table, sliding blocks are connected inside the sliding grooves in a sliding mode, one ends of the sliding blocks are connected with the sliding grooves through first springs, and each group of sliding blocks are connected with a casting roller through connecting rods; the other side of the transition piece is provided with an operation module, and the operation module is used for pushing out the casting; the operation module comprises a connecting ball, a gripper, a connecting pipe and a push rod, the connecting ball is fixedly connected to the other side of the transition piece, the rear cover is of an annular structure, the connecting pipe and the push rod penetrate through the rear cover and extend to the inside of the centrifugal casting tank, the push rod is located inside the connecting pipe and is driven by an electric push rod, one end of the push rod is rotatably connected with two grippers which are symmetrically arranged up and down, the gripper is rotatably connected with the connecting pipe, and the gripper is matched with the connecting ball for use; and a controller is arranged outside the centrifugal casting tank and used for controlling the electric push rod and the motor to work.
When the centrifugal casting machine works, molten metal is guided into the interior of a centrifugal casting tank from a material guide hole of a front cover, a controller controls a motor to work, the motor drives the centrifugal casting tank to rotate, the molten metal can be well filled in the centrifugal casting tank in the radial direction and forms a free surface of a casting under the action of centrifugal force, the controller controls an electric push rod to work in the forming process of the casting, the electric push rod is driven to retract rightwards, one end of a hand grip is driven to retract rightwards, the hand grip swings and grips a connecting ball when retracting rightwards due to the fact that the hand grip is connected with a connecting pipe in a rotating mode, a second rotary disc is fixed, a casting roller cannot move radially along with the rotation of the centrifugal casting tank, meanwhile, under the tensile force of a first spring, a sliding block is far away from the casting, the situation that the casting roller is in contact with the casting when the casting forms the free surface to influence the normal formation of the casting is avoided, the controller controls the electric push rod to push the push rod to extend leftwards, one end of the gripper is driven to move leftwards, the gripper swings reversely, the connecting ball is loosened, the second rotary table is released from being fixed, the first rotary table and the second rotary table rotate along with the rotation of the centrifugal casting pot, wax is filled in the annular groove in the process, the wax is thermally expanded at high temperature, the rotation of the second rotary table is facilitated, the first rotary table and the second rotary table rotate and simultaneously drive the casting roller and the sliding block to rotate, the casting roller and the sliding block simultaneously move towards the direction close to the casting under the action of centrifugal force to extrude the casting, and a certain friction force exists between the casting roller and the casting, so that the relative displacement between the casting roller and the casting is generated, the outermost surface of the free surface formed by the casting can be comprehensively extruded, bubbles, looseness and the like on the surface of the casting are eliminated, and the foundry goods is extruded more compactly, prevent the condition that the foundry goods surface from coming off, after the foundry goods extrusion is finished, controller control motor stop work, open the protecgulum, controller control electric putter promotes push rod and connecting pipe and continues to promote left, with the transition piece, first carousel, the second carousel, casting roller and foundry goods are outwards released, thereby can be convenient take out fashioned foundry goods, after the foundry goods is taken out, controller control electric putter drives the push rod and withdraws right, make the tongs grasp the connecting ball once more, electric putter drives push rod and connecting pipe again and moves right, with the transition piece, first carousel, second carousel and casting roller pull back, can carry out next molten metal's centrifugal casting.
First recess has been seted up to the left end inboard of tongs, the lateral wall of first recess is sphere type structure, the second recess has been seted up to the one end of connecting the ball, because the first recess that is sphere type structure has been seted up to the left end inboard of tongs, first recess more laminates with the sphere of connecting the ball, make the tongs better to the parcel nature of connecting the ball, be favorable to strengthening the stability when tongs and connecting the ball and when the tongs grabs the connection ball, because the second recess has been seted up to the one end of connecting the ball, make the connection ball possess certain elasticity, thereby make the surface of connecting the ball deformable, make the laminating degree between connection ball and the tongs become better, further strengthen the stability between connection ball and the tongs.
The casting roll is characterized in that an eccentric ball is arranged inside the casting roll, the central lines of the eccentric ball and the casting roll are not on the same straight line, the outer part of the eccentric ball is respectively connected with a third spring and the casting roll through a second spring, the second spring is positioned right above the eccentric ball, the number of the third springs is two, the two third springs are positioned at the bottom end of the eccentric ball, the two third springs are arranged in bilateral symmetry with respect to the eccentric ball, four hydraulic cylinders are arranged inside the eccentric ball at equal angles, lower cavities of the four hydraulic cylinders are communicated through connecting holes, when the casting roll rotates and extrudes a casting, the eccentric ball rotates along with the casting roll, as the central lines of the eccentric ball and the casting roll are not on the same straight line, the eccentric ball intermittently impacts the casting roll on the casting roll under the action of centrifugal force, so that the casting roll unevenly rolls the casting, and bubbles and looseness on the surface of the casting can be better eliminated, along with the expansion rod of the hydraulic cylinder close to the casting roll is subjected to external heat conduction, and because the rear cavity inside the hydraulic cylinder is filled with the expansion body, the expansion body inside the hydraulic cylinder close to the casting roll is heated and expanded, the expansion rod of the hydraulic cylinder close to the casting roll is pushed to extend outwards and is contacted with the casting roll, so that the eccentric ball is pushed towards the central position of the casting roll, meanwhile, because the lower cavities of the four hydraulic cylinders are communicated through the connecting holes, the expansion body inside the hydraulic cylinder close to the casting roll flows to other three hydraulic cylinders through the connecting holes, heat is transferred to the expansion bodies in other three hydraulic cylinders, the expansion bodies in other three hydraulic cylinders are heated and expanded and push the expansion rods in the hydraulic cylinders to extend outwards until the central line of the eccentric ball and the central line of the casting roll are positioned on the same straight line, and the expansion rods of the four hydraulic cylinders are all supported on the inner, therefore, the casting rollers can evenly level the castings, and the quality of the castings is improved; in-process, because the back cavity of four pneumatic cylinders is linked together, the inside inflation body of the pneumatic cylinder that presses close to the casting roller is heated the inflation back and flows to other three pneumatic cylinders through the connecting hole, and then has slowed down the time that the pneumatic cylinder that presses close to the casting roller removed the center of eccentric ball to the center of casting roller, and then has increased the time that the eccentric ball is in eccentric state, further improves the effect that the bubble and the looseness on foundry goods surface were eliminated.
The second sawtooth has been seted up to the telescopic link front end of pneumatic cylinder, the first sawtooth of four groups and second sawtooth cooperations use is seted up to angles such as the interior table wall of casting roller, when the telescopic link of four pneumatic cylinders all supported on the interior table wall of casting roller, because the second sawtooth has been seted up to the telescopic link front end of pneumatic cylinder, angles such as the interior table wall of casting roller have been seted up four groups and have been matched with the first sawtooth of use with the second sawtooth, first sawtooth meshes with the second sawtooth mutually, the stability when the telescopic link of pneumatic cylinder is connected with the casting roller has been strengthened, prevent that the eccentric ball from appearing the condition of skew center pin at the in-process of flattening, guarantee the quality of flattening.
The ring channel is formed by the combination of limit groove and middle groove, limit groove quantity is two, two limit groove bilateral symmetry set up, middle groove is located the vertical central line position department in two limit grooves, be connected through the spread groove between middle groove and the limit groove, the wax is heated the inflation in the inside of ring channel, and be full of the limit groove, because the limit groove is located the both sides edge of recess, make the centering nature of second carousel become good, thereby strengthen the stability between second carousel and the transition piece, prevent the condition that the second carousel appeared deflecting when rotating simultaneously, prevent that the second carousel from appearing the card dead condition when rotating.
The cross section of the side groove is of an inverted trapezoidal structure, and a magnetic ball is arranged inside the side groove; two magnetic rings are symmetrically arranged on the left and right of the outer part of the second turntable, the sections of the magnetic rings are in a semicircular structure, the inner diameter of the semicircular structure of the magnetic rings is equal to the width of the bottom of the side groove, the outer diameter of the magnetic ball is equal to the inner diameter of the semicircular structure of the magnetic rings, when the second turntable rotates, the magnetic balls are driven to rotate to generate centrifugal force, the action of the centrifugal force is greater than the magnetic force of the magnetic ring, so that the magnetic balls move towards the inner part of the side groove, because the section of the side groove is designed into an inverted trapezoidal structure, the wax in the side groove can be prevented from being blocked by the magnetic ball, the normal effect of the wax is ensured, and meanwhile, when the second turntable stops rotating, the centrifugal force disappears, under the action of magnetic force, the magnetic ball is combined with the magnetic ring, when the push rod pushes the second turntable to the left side, the magnetic ball can act on the axial acting force between the second rotating disc and the transition piece, so that the stability of the second rotating disc and the transition piece during movement is enhanced.
The distribution of the three casting rollers is in a regular triangle structure, one casting roller is positioned right above the connecting line of the other two casting rollers, when molten metal is introduced into the centrifugal casting tank, because the distribution of the three casting rollers is in the regular triangle structure, one casting roller is positioned right above the connecting line of the other two casting rollers, the molten metal enters the middle of the two casting rollers at the lower part when entering, the molten metal cannot contact with any one casting roller, the molten metal can be prevented from being solidified into blocks on the surfaces of the casting rollers, the solidified blocks can be prevented from extruding and deforming the surfaces of castings when the casting rollers extrude the formed castings, and the quality of the castings is ensured.
The invention has the following beneficial effects:
1. according to the invention, the free surface of the casting is extruded by the casting roller, bubbles, looseness and the like on the free surface of the casting are removed, the quality of the casting is improved, the work of the casting roller is controlled by the control module, and the casting roller can extrude the casting after the casting initially forms the free surface, so that the bubbles and looseness on the surface of the casting can be better eliminated, and the quality of the casting is improved.
2. The invention is provided with the control module which can control the casting to be pushed out of the centrifugal casting tank after the extrusion of the casting roller is finished, so that the casting is convenient to take out, and the later work is convenient to carry out.
3. The invention realizes the rolling and leveling of the casting by the casting roller by adjusting the position of the eccentric ball inside the casting roller, further improves the effect of eliminating bubbles and looseness on the surface of the casting and further improves the quality of the casting.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a schematic view of the connection of the gripper and the connecting ball according to the present invention;
FIG. 3 is a schematic view of the internal structure of the grip of the present invention;
FIG. 4 is a cross-sectional view B-B of FIG. 3 in accordance with the present invention;
FIG. 5 is an enlarged view of a portion of portion C of FIG. 1 in accordance with the present invention;
FIG. 6 is a cross-sectional view A-A of FIG. 1 in accordance with the present invention;
FIG. 7 is a schematic view of the internal construction of the casting roll of the present invention;
FIG. 8 is a cross-sectional view C-C of FIG. 7 of the present invention;
in the figure: the centrifugal casting device comprises a centrifugal casting can 1, a front cover 2, a first cavity 21, a first rotary disc 3, a sliding block 4, a sliding groove 5, a first spring 6, a casting roller 7, a second rotary disc 8, a rear cover 9, a transition piece 10, a second cavity 101, an annular groove 11, a side groove 111, a middle groove 112, a magnetic ring 113, a magnetic ball 115, an operation module 15, a connecting ball 151, a second groove 152, a hand grip 153, a first groove 154, a connecting pipe 155, a push rod 156, a fixed seat 157, a second spring 16, a hydraulic cylinder 17, an eccentric ball 18, a third spring 19, a first sawtooth 20 and a second sawtooth 22.
Detailed Description
A centrifugal casting apparatus for a cylinder block of a hydraulic cylinder according to an embodiment of the present invention will be described below with reference to fig. 1 to 8.
As shown in fig. 1, the centrifugal casting equipment for the cylinder body of the hydraulic cylinder comprises a centrifugal casting tank 1, three casting rolls 7 and an operation module 15, wherein one end of the centrifugal casting tank 1 is spirally connected with a front cover 2, the other end of the centrifugal casting tank 1 is spirally connected with a rear cover 9, a transition piece 10 is embedded and connected in the centrifugal casting tank 1, the transition piece 10 and the rear cover 9 are positioned at the same end of the centrifugal casting tank 1, and the centrifugal casting tank 1 is driven by a motor; a first cavity 21 is formed in one side of the front cover 2, a first rotating disc 3 is installed inside the first cavity 21, a second cavity 101 is formed in one side of the transition piece 10, an annular groove 11 is formed inside the second cavity 101, a second rotating disc 8 is installed inside the second cavity 101, and the second rotating disc 8 is rotatably connected with the transition piece 10; three groups of sliding grooves 5 are formed in one side of the first rotary table 3 and one side of the second rotary table 8 at equal angles, the number of each group of sliding grooves 5 is two, two sliding grooves 5 in each group of sliding grooves 5 are respectively positioned on one side of the first rotary table 3 and one side of the second rotary table 8, sliding blocks 4 are connected inside the sliding grooves 5 in a sliding mode, one ends of the sliding blocks 4 are connected with the sliding grooves 5 through first springs 6, and each group of sliding blocks 4 are connected with casting rolls 7 through connecting rods; the other side of the transition piece 10 is provided with an operation module 15, and the operation module 15 is used for pushing out the casting; the operation module 15 comprises a connecting ball 151, a hand grip 153, a connecting pipe 155 and a push rod 156, the connecting ball 151 is fixedly connected to the other side of the transition piece 10, the rear cover 9 is of an annular structure, the connecting pipe 155 and the push rod 156 penetrate through the rear cover 9 and extend to the inside of the centrifugal casting tank 1, the push rod 156 is located inside the connecting pipe 155, the push rod 156 is driven by an electric push rod, one end of the push rod 156 is rotatably connected with two hand grips 153 which are symmetrically arranged up and down, the hand grip 153 is rotatably connected with the connecting pipe 155, and the hand grip 153 is matched with the connecting ball 151 for use; and a controller is arranged outside the centrifugal casting tank 1 and used for controlling the work of the electric push rod and the motor.
When the centrifugal casting machine works, molten metal is guided into the interior of the centrifugal casting tank 1 from the material guide hole of the front cover 2, the controller controls the motor to work, the motor drives the centrifugal casting tank 1 to rotate, the molten metal can be enabled to be well filled in the centrifugal casting tank 1 in the radial direction and form a free surface of a casting under the action of centrifugal force, the controller controls the electric push rod to work in the forming process of the casting, the push rod 156 is driven to retract rightwards, one end of the hand grip 153 is driven to retract rightwards, the hand grip 153 swings per se and catches the connecting ball 151 while the hand grip 153 retracts rightwards due to the fact that the hand grip 153 is rotatably connected with the connecting pipe 155, so that the second rotary disc 8 is fixed, the casting roller 7 cannot radially move along with the rotation of the centrifugal casting tank 1, meanwhile, the sliding block 4 is far away from the casting under the tensile force of the first spring 6, and the phenomenon that the casting roller 7 is contacted with, after the free surface is gradually formed preliminarily in the interior of the centrifugal casting can 1, the controller controls the electric push rod to push the push rod 156 to extend leftwards, so as to drive one end of the gripper 153 to move leftwards, and simultaneously the gripper 153 swings reversely, the connecting ball 151 is loosened, the fixation of the second rotary disc 8 is released, the first rotary disc 3 and the second rotary disc 8 rotate along with the rotation of the centrifugal casting can 1, the annular groove 11 is filled with wax, the wax is thermally expanded at high temperature, so as to facilitate the rotation of the second rotary disc 8, the first rotary disc 3 and the second rotary disc 8 drive the casting roll 7 and the slide block 4 to rotate simultaneously, the casting roll 7 and the slide block 4 move towards the direction close to the casting simultaneously under the action of centrifugal force, so as to extrude the casting, and because a certain friction force exists between the casting roll 7 and the casting, the casting roll 7 and the casting generate relative displacement, thereby the outermost surface of the free surface formed by the casting can be comprehensively extruded, the air bubbles, the looseness and the like on the surface of the casting are eliminated, the casting is extruded more compactly, the falling-off of the surface of the casting is prevented, after the extrusion of the casting is finished, the controller controls the motor to stop working, opens the front cover 2, controls the electric push rod to push the push rod 156 and the connecting pipe 155 to push left continuously, pushes the transition piece 10, the first rotary disc 3, the second rotary disc 8, the casting roller 7 and the casting outwards, therefore, the formed casting can be conveniently taken out, after the casting is taken out, the controller controls the electric push rod to drive the push rod 156 to retract rightwards, the gripper 153 catches the connecting ball 151 again, the electric push rod drives the push rod 156 and the connecting pipe 155 to move rightwards again, the transition piece 10, the first rotary disc 3, the second rotary disc 8 and the casting roller 7 are pulled back, and then the next centrifugal casting of molten metal can be carried out.
As shown in fig. 2 to 4, a first groove 154 is formed in the inner side of the left end of the hand grip 153, a side wall of the first groove 154 is of a spherical structure, a second groove 152 is formed in one end of the connection ball 151, and the first groove 154 is formed in the inner side of the left end of the hand grip 153 and is of a spherical structure, so that the first groove 154 is more attached to the spherical surface of the connection ball 151, and the wrapping property of the hand grip 153 on the connection ball 151 is better, which is beneficial to enhancing the stability of the hand grip 153 when being connected with the connection ball 151, and when the hand grip 153 grips the connection ball 151, the second groove 152 is formed in one end of the connection ball 151, so that the connection ball 151 has certain elasticity, and the surface of the connection ball 151 can be deformed, so that the attachment degree between the connection ball 151 and the hand grip 153 is better, and the stability between the connection ball 151 and the.
As shown in fig. 7-8, an eccentric ball 18 is arranged inside the casting roll 7, the eccentric ball 18 is not aligned with the center line of the casting roll 7, the outside of the eccentric ball 18 is connected with a third spring 19 and the casting roll 7 through a second spring 16, respectively, the second spring 16 is positioned right above the eccentric ball 18, the number of the third springs 19 is two, two third springs 19 are positioned at the bottom end position of the eccentric ball 18, the two third springs 19 are arranged symmetrically left and right with respect to the eccentric ball 18, four hydraulic cylinders 17 are arranged in the eccentric ball 18 at equal angles, the lower cavities of the four hydraulic cylinders 17 are communicated through connecting holes, when the casting roll 7 rotates and extrudes a casting, the eccentric ball 18 rotates along with the connecting holes, and because the eccentric ball 18 is not aligned with the center line of the casting roll 7, the eccentric ball 18 intermittently impacts the casting roll 7 under the action of centrifugal force, the casting roller 7 is enabled to carry out uneven rolling on the casting, so that bubbles and looseness on the surface of the casting can be better eliminated, the expansion rod of the hydraulic cylinder 17 close to the casting roller 7 is subjected to external heat conduction, and because the rear cavity inside the hydraulic cylinder 17 is filled with the expansion body, the expansion body inside the hydraulic cylinder 17 close to the casting roller 7 is enabled to be heated and expanded, the expansion rod of the hydraulic cylinder 17 close to the casting roller 7 is pushed to extend outwards and is contacted with the casting roller 7, so that the eccentric ball 18 is pushed to the central position of the casting roller 7, meanwhile, because the lower cavities of the four hydraulic cylinders 17 are communicated through the connecting holes, the expansion body inside the hydraulic cylinder 17 close to the casting roller 7 flows to other three hydraulic cylinders 17 through the connecting holes, heat is transferred to the expansion bodies inside other three hydraulic cylinders 17, and the expansion bodies inside the other three hydraulic cylinders 17 are enabled to be heated and expanded and push the expansion rods, until the central line of the eccentric ball 18 and the central line of the casting roller 7 are positioned on the same straight line, the telescopic rods of the four hydraulic cylinders 17 are supported on the inner surface wall of the casting roller 7, so that the casting roller 7 can evenly level the casting, and the quality of the casting is improved; in the process, because the rear cavities of the four hydraulic cylinders 17 are communicated, the internal expansion bodies of the hydraulic cylinders 17 close to the casting rolls 7 are heated and expanded and then flow to the other three hydraulic cylinders 17 through the connecting holes, so that the time for moving the centers of the eccentric balls 18 to the centers of the casting rolls 7 by the hydraulic cylinders 17 close to the casting rolls 7 is reduced, the time for the eccentric balls 18 to be in an eccentric state is prolonged, and the bubble and porosity eliminating effect on the surface of a casting is further improved.
As shown in fig. 8, the front end of the telescopic rod of the hydraulic cylinder 17 is provided with a second saw tooth 22, the inner surface wall of the casting roll 7 and the like are provided with four groups of first saw teeth 20 matched with the second saw teeth 22 for use, when the telescopic rods of the four hydraulic cylinders 17 are supported on the inner surface wall of the casting roll 7, the front end of the telescopic rod of the hydraulic cylinder 17 is provided with the second saw teeth 22, the inner surface wall of the casting roll 7 and the like are provided with four groups of first saw teeth 20 matched with the second saw teeth 22 for use, the first saw teeth 20 are meshed with the second saw teeth 22, the stability of the telescopic rod of the hydraulic cylinder 17 when being connected with the casting roll 7 is enhanced, the eccentric ball 18 is prevented from deviating the central axis in the leveling process, and the leveling quality is ensured.
As shown in fig. 5, the annular groove 11 is formed by combining the side grooves 111 and the middle groove 112, the number of the side grooves 111 is two, the two side grooves 111 are arranged in bilateral symmetry, the middle groove 112 is located at the vertical central line position of the two side grooves 111, the middle groove 112 is connected with the side grooves 111 through a connecting groove, wax is heated and expanded inside the annular groove 11 and fills the side grooves 111, the side grooves 111 are located at the two side edges of the groove, so that the centering performance of the second rotary disc 8 is improved, the stability between the second rotary disc 8 and the transition piece 10 is enhanced, meanwhile, the second rotary disc 8 is prevented from deflecting when rotating, and the second rotary disc 8 is prevented from being stuck when rotating.
As shown in fig. 5, the cross section of the side groove 111 is an inverted trapezoidal structure, and a magnetic ball 115 is disposed inside the side groove 111; the outer part of the second rotary disk 8 is provided with two magnetic rings 113 which are arranged symmetrically left and right, the cross section of the magnetic ring 113 is in a semicircular structure, the inner diameter of the semicircular structure of the magnetic ring 113 is equal to the width of the bottom of the side groove 111, the outer diameter of the magnetic ball 115 is equal to the inner diameter of the semicircular structure of the magnetic ring 113, when the second rotary disk 8 rotates, the magnetic ball 115 is driven to rotate to generate centrifugal force, the action of the centrifugal force is greater than the magnetic force of the magnetic ring 113, so that the magnetic ball 115 moves towards the inner part of the side groove 111, because the cross section of the side groove 111 is in an inverted trapezoid structure, the wax in the side groove 111 can be prevented from being blocked by the magnetic ball 115, the normal effect of the wax is ensured, meanwhile, when the second rotary disk 8 stops rotating, the centrifugal force disappears, under the action of the magnetic force, the magnetic ball 115 is combined with the magnetic ring 113, when the push rod 156 pushes the second rotary disk 8 towards, thereby enhancing the stability of both when moving.
As shown in fig. 6, the distribution of the three casting rolls 7 is in a regular triangle structure, one casting roll 7 is positioned right above the connecting line of the other two casting rolls 7, when the molten metal is introduced into the centrifugal casting tank 1, because the distribution of the three casting rolls 7 is in the regular triangle structure, one casting roll 7 is positioned right above the connecting line of the other two casting rolls 7, the molten metal enters just in the middle of the lower two casting rolls 7 when entering, the molten metal cannot contact with any one casting roll 7, the molten metal can be prevented from being solidified into blocks on the surfaces of the casting rolls 7, when the casting rolls 7 extrude the formed casting, the solidified blocks extrude and deform the surface of the casting, and the quality of the casting is ensured.
The specific working process is as follows:
when the centrifugal casting machine works, molten metal is guided into the interior of the centrifugal casting tank 1 from the material guide hole of the front cover 2, the controller controls the motor to work, the motor drives the centrifugal casting tank 1 to rotate, the molten metal can be enabled to be well filled in the centrifugal casting tank 1 in the radial direction and form a free surface of a casting under the action of centrifugal force, the controller controls the electric push rod to work in the forming process of the casting, the push rod 156 is driven to retract rightwards, one end of the hand grip 153 is driven to retract rightwards, the hand grip 153 swings per se and catches the connecting ball 151 while the hand grip 153 retracts rightwards due to the fact that the hand grip 153 is rotatably connected with the connecting pipe 155, so that the second rotary disc 8 is fixed, the casting roller 7 cannot radially move along with the rotation of the centrifugal casting tank 1, meanwhile, the sliding block 4 is far away from the casting under the tensile force of the first spring 6, and the phenomenon that the casting roller 7 is contacted with, after the free surface is gradually formed preliminarily in the interior of the centrifugal casting can 1, the controller controls the electric push rod to push the push rod 156 to extend leftwards, so as to drive one end of the gripper 153 to move leftwards, and simultaneously the gripper 153 swings reversely, the connecting ball 151 is loosened, the fixation of the second rotary disc 8 is released, the first rotary disc 3 and the second rotary disc 8 rotate along with the rotation of the centrifugal casting can 1, the annular groove 11 is filled with wax, the wax is thermally expanded at high temperature, so as to facilitate the rotation of the second rotary disc 8, the first rotary disc 3 and the second rotary disc 8 drive the casting roll 7 and the slide block 4 to rotate simultaneously, the casting roll 7 and the slide block 4 move towards the direction close to the casting simultaneously under the action of centrifugal force, so as to extrude the casting, and because a certain friction force exists between the casting roll 7 and the casting, the casting roll 7 and the casting generate relative displacement, thereby the outermost surface of the free surface formed by the casting can be comprehensively extruded, the air bubbles, the looseness and the like on the surface of the casting are eliminated, the casting is extruded more compactly, the falling-off of the surface of the casting is prevented, after the extrusion of the casting is finished, the controller controls the motor to stop working, opens the front cover 2, controls the electric push rod to push the push rod 156 and the connecting pipe 155 to push left continuously, pushes the transition piece 10, the first rotary disc 3, the second rotary disc 8, the casting roller 7 and the casting outwards, therefore, the formed casting can be conveniently taken out, after the casting is taken out, the controller controls the electric push rod to drive the push rod 156 to retract rightwards, the gripper 153 catches the connecting ball 151 again, the electric push rod drives the push rod 156 and the connecting pipe 155 to move rightwards again, the transition piece 10, the first rotary disc 3, the second rotary disc 8 and the casting roller 7 are pulled back, and then the next centrifugal casting of molten metal can be carried out.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. The utility model provides a pneumatic cylinder body centrifugal casting equipment which characterized in that: the centrifugal casting device comprises a centrifugal casting tank (1), three casting rollers (7) and an operation module (15), wherein one end of the centrifugal casting tank (1) is in threaded connection with a front cover (2), the other end of the centrifugal casting tank (1) is in threaded connection with a rear cover (9), a transition piece (10) is embedded and connected in the centrifugal casting tank (1), the transition piece (10) and the rear cover (9) are located at the same end of the centrifugal casting tank (1), and the centrifugal casting tank (1) is driven by a motor; a first cavity (21) is formed in one side of the front cover (2), a first rotating disc (3) is installed inside the first cavity (21), a second cavity (101) is formed in one side of the transition piece (10), an annular groove (11) is formed inside the second cavity (101), a second rotating disc (8) is installed inside the second cavity (101), and the second rotating disc (8) is rotatably connected with the transition piece (10); three groups of sliding grooves (5) are formed in one side of the first rotary table (3) and one side of the second rotary table (8) at equal angles, the number of the sliding grooves (5) in each group is two, two sliding grooves (5) in each group of sliding grooves (5) are respectively located on one sides of the first rotary table (3) and the second rotary table (8), sliding blocks (4) are connected inside the sliding grooves (5) in a sliding mode, one ends of the sliding blocks (4) are connected with the sliding grooves (5) through first springs (6), and each group of sliding blocks (4) are connected with casting rollers (7) through connecting rods; an operation module (15) is arranged on the other side of the transition piece (10), and the operation module (15) is used for pushing out the casting; the operation module (15) comprises a connecting ball (151), grippers (153), a connecting pipe (155) and a push rod (156), the connecting ball (151) is fixedly connected to the other side of the transition piece (10), the rear cover (9) is of an annular structure, the connecting pipe (155) and the push rod (156) penetrate through the rear cover (9) and extend to the inside of the centrifugal casting tank (1), the push rod (156) is located inside the connecting pipe (155), the push rod (156) is driven by an electric push rod, one end of the push rod (156) is rotatably connected with the two grippers (153) which are symmetrically arranged up and down, the grippers (153) are rotatably connected with the connecting pipe (155), and the grippers (153) are matched with the connecting ball (151) for use; a controller is arranged outside the centrifugal casting tank (1) and used for controlling the electric push rod and the motor to work;
the casting device is characterized in that an eccentric ball (18) is arranged inside the casting roller (7), the eccentric ball (18) is not in the same straight line with the center line of the casting roller (7), the outer portion of the eccentric ball (18) is connected with a third spring (19) and the casting roller (7) through a second spring (16), the second spring (16) is located right above the eccentric ball (18), the number of the third springs (19) is two, the two third springs (19) are located at the bottom end positions of the eccentric ball (18), the two third springs (19) are arranged in bilateral symmetry relative to the eccentric ball (18), four hydraulic cylinders (17) are arranged inside the eccentric ball (18) at equal angles, and lower cavities of the four hydraulic cylinders (17) are communicated through connecting holes.
2. The centrifugal casting apparatus of a cylinder block of a hydraulic cylinder according to claim 1, wherein: a first groove (154) is formed in the inner side of the left end of the gripper (153), the side wall of the first groove (154) is of a spherical structure, and a second groove (152) is formed in one end of the connecting ball (151).
3. A hydraulic cylinder (17) block centrifugal casting apparatus according to claim 1, characterized in that: the front end of a telescopic rod of the hydraulic cylinder (17) is provided with second saw teeth (22), and the inner surface wall of the casting roller (7) is provided with four groups of first saw teeth (20) matched with the second saw teeth (22) for use at equal angles.
4. The centrifugal casting apparatus of a cylinder block of a hydraulic cylinder according to claim 1, wherein: the annular groove (11) is formed by combining side grooves (111) and middle grooves (112), the number of the side grooves (111) is two, the two side grooves (111) are arranged in bilateral symmetry, the middle grooves (112) are located at the vertical central line positions of the two side grooves (111), and the middle grooves (112) are connected with the side grooves (111) through connecting grooves.
5. The centrifugal casting apparatus of a cylinder block of a hydraulic cylinder according to claim 4, wherein: the cross section of the side groove (111) is of an inverted trapezoidal structure, and a magnetic ball (115) is arranged in the side groove (111); two magnetic rings (113) which are arranged in bilateral symmetry are arranged outside the second turntable (8), the cross section of each magnetic ring (113) is of a semicircular structure, the inner diameter of the semicircular structure of each magnetic ring (113) is equal to the width of the bottom of each side groove (111), and the outer diameter of each magnetic ball (115) is equal to the inner diameter of the semicircular structure of each magnetic ring (113).
6. The centrifugal casting apparatus of a cylinder block of a hydraulic cylinder according to claim 1, wherein: the three casting rolls (7) are distributed in a regular triangle structure, wherein one casting roll (7) is positioned right above the connecting line of the other two casting rolls (7).
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| CN201910012125.9A CN109590444B (en) | 2019-01-07 | 2019-01-07 | Centrifugal casting equipment for hydraulic cylinder body |
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| CN201910012125.9A CN109590444B (en) | 2019-01-07 | 2019-01-07 | Centrifugal casting equipment for hydraulic cylinder body |
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| CN113275534B (en) * | 2021-05-20 | 2022-03-11 | 燕山大学 | Manufacturing device for ultra-thick-wall large-caliber corrugated pipe and machining method thereof |
| CN117182024B (en) * | 2023-08-08 | 2024-05-07 | 安徽德鸿机件制造有限公司 | Heavy hydraulic cylinder barrel centrifugal casting equipment |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5311820A (en) * | 1976-07-21 | 1978-02-02 | Kubota Ltd | Method of centrifugally casting pipe having projection on its internal surface |
| JPS5584265A (en) * | 1978-12-19 | 1980-06-25 | Kubota Ltd | Pressure molding method for bore surface of cylindrical casting |
| JPS6028883B2 (en) * | 1981-03-19 | 1985-07-08 | 株式会社クボタ | Heat treatment method for centrifugally cast steel pipes |
| JPS5834195A (en) * | 1981-08-25 | 1983-02-28 | Mitsubishi Heavy Ind Ltd | Manufacture of aluminum alloy bearing |
| JPS63231012A (en) * | 1987-03-17 | 1988-09-27 | Mitsubishi Heavy Ind Ltd | Manufacture of composite roll |
| JPH084919B2 (en) * | 1987-12-07 | 1996-01-24 | 川崎製鉄株式会社 | Casting method of composite roll for rolling excellent in abrasion resistance and surface roughening resistance |
| JPH0471710A (en) * | 1990-07-10 | 1992-03-06 | Kubota Corp | Reforming method of inner surface of centrifugal cast steel tube |
| CN1060803A (en) * | 1990-10-23 | 1992-05-06 | 颜连汕 | Extruding centrifugal casting method |
| JPH05285620A (en) * | 1992-04-15 | 1993-11-02 | Kawasaki Steel Corp | Apparatus for manufacturing centrifugal casting roll |
| CN2579563Y (en) * | 2002-11-26 | 2003-10-15 | 陈政 | Two-way centrifugal casting device |
| KR101920861B1 (en) * | 2013-09-06 | 2018-11-21 | 현대일렉트릭앤에너지시스템(주) | Centrifugal casting device for manufacturing rotor |
| CN206169226U (en) * | 2016-09-26 | 2017-05-17 | 山西光华铸管有限公司 | Cast tube centrifuge pipe drawing device |
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Effective date of registration: 20201112 Address after: 526000, Guangdong, Zhaoqing, Duanzhou all the way south, Duanzhou industrial south, east side of the factory Road No. Applicant after: ZHAOQING WOSON PRECISION MACHINERY Co.,Ltd. Address before: 526061 Guangdong Province, Zhaoqing city Duanzhou District Donggang Zhaoqing University Applicant before: ZHAOQING University |
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