A positioning device for a cylinder liner die

Abstract

This invention discloses a positioning device for a cylinder liner metal mold, relating to the field of cylinder liner casting positioning technology. The invention includes: a base platform with two sliding grooves on its top surface, a protective frame on each side of the top surface, and a heat insulation component in the middle of the top surface; a U-shaped frame fixed to the bottom of the base platform; a servo motor fixedly mounted on the right side of the U-shaped frame; a bidirectional screw penetrating and rotatably mounted on the left and right sides of the inner wall of the U-shaped frame, with the right end of the bidirectional screw fixedly connected to the left end of the output shaft of the servo motor; and two internal threaded rings slidably mounted on the outer wall of the bidirectional screw. This invention utilizes the elasticity of springs to slow the movement of the support plate to both sides, thereby avoiding the problem of poor casting effect of the cylinder liner metal mold caused by cooling and hardening during subsequent casting.

Description

Technical Field

[0001] This invention belongs to the field of cylinder liner casting positioning, specifically relating to a positioning device for a cylinder liner metal mold. Background Technology

[0002] During the casting process, the wall thickness of the newly formed cylinder liner metal mold needs to be processed to ensure that the wall thickness is uniform and to accurately compensate for thermal deformation errors. The positioning device of the cylinder liner metal mold is mainly used to quickly and accurately position the cylinder liner metal mold, precisely control the direction of the cylinder liner metal mold, and improve the casting efficiency and quality of the cylinder liner metal mold.

[0003] Patent CN210996322U discloses a positioning device for a metal mold of a marine diesel engine cylinder liner. The device includes a metal mold plate, four positioning sliders, and four positioning feet. Four grooves are radially and evenly distributed on the upper surface of the metal mold plate. The number of positioning sliders and positioning feet is the same as the number of grooves. The upper part of the positioning feet is connected to the metal mold, and the lower part of the positioning feet is movably embedded in the groove of the metal mold plate. The positioning sliders slide into the groove from the port of the groove at the outer end of the metal mold plate and engage with the positioning feet. This patent can ensure accurate positioning of the metal mold and the mold plate during the casting process of marine diesel engine cylinder liners, ensuring the quality of the mold after demolding. It also has a simple structure and is easy to operate, making it particularly suitable for the mass production of castings that require segmented molding.

[0004] When the positioning device positions the newly formed high-temperature cylinder liner metal mold, the inside of the mold is relatively soft, making it suitable for casting and mold repair. However, as time goes by, the high-temperature cylinder liner metal mold gradually cools down, and the mold hardens during subsequent casting, leading to poor casting results for the cylinder liner metal mold on the positioning device. Summary of the Invention

[0005] The purpose of this invention is to provide a positioning device for cylinder liner metal molds, so as to solve the problem that the cylinder liner metal molds harden when cooled during subsequent casting, resulting in poor casting effect of the cylinder liner metal molds on the positioning device.

[0006] To achieve the above objectives, the present invention provides a positioning device for a cylinder liner metal mold, comprising: a base platform, two sliding grooves formed on the top surface of the base platform, a protective frame provided on both sides of the top surface of the base platform, and a heat insulation component provided in the middle of the top surface of the base platform; The U-shaped frame is fixed to the bottom of the base platform. A servo motor, which is fixedly mounted on the right side of the U-shaped frame; A bidirectional screw is installed through and rotatably on the left and right sides of the inner wall of the U-shaped frame, and the right end of the bidirectional screw is fixedly connected to the left end of the output shaft of the servo motor. Two internal threaded rings are slidably mounted on the outer wall of the bidirectional screw. Under the constraint of the sliding groove of the base plate, the internal threaded rings move in opposite directions in the two threaded grooves of the bidirectional screw. The frame plate is fixed to the outer wall of two inner threaded rings, and the inner threaded rings drive the frame plate to move to both sides. An arc-shaped plate is fixed on the top surface of two support plates. The support plates move to both sides in two arc grooves on the base platform. The support plates drive the arc-shaped plate to move to both sides. The arc-shaped plate is used to clamp and position the cylinder liner metal mold. Guide rod, which is fixed above the inner wall of the U-shaped frame; The frame plate is slidably mounted on the outer wall of the guide rod; Two springs are respectively disposed between the inner wall of the guide rod and the outer wall of the frame plate. The frame plate moves to both sides on the guide rod, and the frame plate drives the springs to move to both sides, causing the springs to contract.

[0007] In one possible implementation, the insulation assembly includes: a circular shell, a resistance heater, and a copper tube, wherein the circular shell is installed through and fixedly mounted in the middle of the top surface of the base, the resistance heater is fixedly mounted inside the bottom of the circular shell, and the copper tube is fixed to the top surface of the resistance heater.

[0008] In one possible implementation, the outer wall of the bidirectional screw has two non-self-locking threaded grooves, the two non-self-locking threaded grooves of the bidirectional screw are in opposite directions, and the inner walls of the two inner threaded rings mesh with the outer walls of the two threaded grooves of the bidirectional screw.

[0009] In one possible implementation, the outer wall of the frame plate slides in contact with the inner walls of the two grooves of the base platform, the bottom surface of the frame plate slides in contact with the inner bottom end of the U-shaped frame, and the two springs are sleeved on the outside of the guide rod.

[0010] In one possible implementation, the insulation component is positioned above the guide rod, the arc-shaped plate is positioned above the base platform, and the guide rod is positioned above the bidirectional screw.

[0011] In one possible implementation, a slag collection device is provided on the side of the two racks that are far apart from each other. The slag collection device is used to prevent the waste residue from grinding the cylinder liner metal mold from falling into the bottom platform. The inner wall of the slag collection device is provided with a limiting device, which is used to limit the diameter of the arc plate clamping.

[0012] In one possible implementation, the slag collection device includes: an L-shaped plate, which is fixed above the two support plates on opposite sides of each other; The square box is fixed to the bottom of the inside of two L-shaped plates. The square box is located below two sliding grooves on the base platform. A sliding groove is opened on both the front and back of the square box. The square box collects the waste residue that falls off during the grinding of the cylinder liner metal mold. Two U-shaped plates are respectively fixed to the inner top of the base platform; Four circular blocks are fixed to the inner walls of the two U-shaped plates, one in front and one in back. The outer walls of the four circular blocks slide in contact with the inner walls of the grooves of the two square boxes, and the square boxes slide to both sides on the circular blocks. The output shaft of the servo motor is reset, and the square box moves to the bottom of the two sliding grooves on the platform. The square box is used to collect the waste residue from the grinding of the cylinder liner metal mold.

[0013] In one possible implementation, a support is fixed to the bottom surface of each of the two square boxes, and the bottom surfaces of the two supports slide in contact with the inner bottom end of the U-shaped frame. An arc shell is fixed to the inner bottom end of each of the two supports, and the supports drive the arc shells to move to both sides. A sponge block is fixed to the inner wall of each of the two arc shells, and the arc shells drive the sponge blocks to move to both sides. The outer walls of the two sponge blocks slide in contact with the outer wall of the bidirectional screw, and the interior of the two sponge blocks is filled with lubricating oil.

[0014] In one possible implementation, the limiting device includes: a round rod that passes through and is fixed to the front and rear of the inner walls of the two supports respectively; The sliders are fixed to the front and back of the two round rods respectively; U-shaped horizontal plate, the U-shaped horizontal plate being fixed inside the bottom of the U-shaped frame; Two concave plates are fixed to the front and back of the inner wall of the U-shaped horizontal plate, and the slider slides to both sides in the concave plates. The inner walls of the two concave plates slide in contact with the outer wall of the slider. The two concave plates are used to limit the slider and restrict the distance that the two arc-shaped plates move to both sides.

[0015] In one possible implementation, two ring blocks are fixed to the outer walls of the two circular rods respectively, and a strip is fixed to the outer walls of the four ring blocks respectively. The ring blocks drive the strips to move to both sides. Two connecting plates are fixed to the top surfaces of the four strips. The top surfaces of the two connecting plates are fixedly connected to the bottom surface of the square box. The two connecting plates are located on the side of the two L-shaped plates that are far apart from each other. The strips drive the connecting plates to move to both sides, and the connecting plates support the square box to move to both sides.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] (1) The present invention uses a base, a protective frame, a heat insulation component, a U-shaped frame, a servo motor, a bidirectional screw, an inner threaded ring, a frame plate, an arc plate, and a guide rod in conjunction with a spring. Under the restriction of the sliding groove of the base, the inner threaded ring moves in opposite directions in the two threaded grooves of the bidirectional screw. The inner threaded ring drives the frame plate to move to both sides. The frame plate moves to both sides in the two arc grooves of the base. The frame plate moves to both sides on the guide rod. The frame plate drives the spring to move to both sides. The spring contracts. The frame plate drives the arc plate to move to both sides. The two arc plates are sandwiched inside the cylinder liner metal mold. Under the elastic force of the spring, the speed at which the frame plate moves to both sides is slowed down, so that the arc plate gently abuts against the inside of the cylinder liner metal mold. The resistance heater transfers the temperature to the copper tube, the copper tube transfers the temperature to the round shell, and the round shell transfers the temperature to the inside of the cylinder liner metal mold. At the same time, the temperature inside the cylinder liner metal mold is maintained, preventing the cylinder liner metal mold from cooling and hardening during subsequent casting, which would cause poor casting effect of the cylinder liner metal mold on the positioning device.

[0018] (2) By setting up a slag collection device, the L-shaped plate, square box and U-shaped plate cooperate with the round block. The square box slides to both sides on the round block. The square box collects the slag that falls off during the casting of the cylinder liner metal mold. The output shaft of the servo motor is reset. The square box moves to the bottom of the two sliding grooves of the bottom platform for centralized processing of the slag. This prevents the slag that falls off during the casting of the cylinder liner metal mold from falling into the bottom platform and causing damage to the positioning device.

[0019] (3) By setting up the slag collection device, the support frame and the arc shell cooperate with the sponge block. The support frame drives the arc shell to move to both sides, and the arc shell drives the sponge block to move to both sides. During the movement, the sponge block wipes the surface of the bidirectional screw to prevent the bidirectional screw from aging and rusting, which would cause the positioning device to operate poorly.

[0020] (4) By setting a limiting device, the present invention enables the round rod, the slider and the U-shaped horizontal plate to cooperate with the concave plate. The slider slides to both sides in the concave plate, and the concave plate limits the slider, restricting the distance that the two arc plates move to both sides, preventing the arc plates from expanding and clamping the cylinder liner metal mold too long, causing the cylinder liner metal mold to crack and be damaged below.

[0021] (5) By setting the limiting device, the ring block and the strip frame cooperate with the connecting plate. The ring block drives the strip frame to move to both sides, the strip frame drives the connecting plate to move to both sides, and the connecting plate supports the square box to move to both sides, so as to prevent the square box from shaking on both sides and causing the positioning device to shake too frequently. Attached Figure Description

[0022] Figure 1 Overall diagram provided for embodiments of this application;

[0023] Figure 2 Internal component diagrams provided for embodiments of this application;

[0024] Figure 3 Provided for the embodiments of this application Figure 2 Enlarged view of a portion of point A in the middle;

[0025] Figure 4 A sectional view of the base provided in an embodiment of this application;

[0026] Figure 5 A diagram of a slag collection device provided in an embodiment of this application;

[0027] Figure 6 Provided for the embodiments of this application Figure 5 Enlarged view of a section at point B in the middle;

[0028] Figure 7 A diagram of a limiting device provided in an embodiment of this application;

[0029] Figure 8 Provided for the embodiments of this application Figure 7 Enlarged view of a section at point C.

[0030] Explanation of key figure labels:

[0031] 1. Base platform; 2. Protective frame; 3. Insulation component; 301. Round shell; 302. Resistance heater; 303. Copper pipe; 4. U-shaped frame; 5. Servo motor; 6. Bidirectional screw; 7. Internal threaded ring; 8. Frame plate; 9. Arc plate; 10. Guide rod; 11. Spring; 12. Slag collection device; 121. L-shaped plate; 122. Square box; 123. U-shaped plate; 124. Round block; 125. Support frame; 126. Arc shell; 127. Sponge block; 13. Limiting device; 131. Round rod; 132. Slider; 133. U-shaped horizontal plate; 134. Concave plate; 135. Ring block; 136. Strip frame; 137. Connecting plate. Detailed Implementation

[0032] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0033] like Figure 1-8 As shown, one embodiment of the present invention is: a positioning device for a cylinder liner metal mold, comprising: a base 1, two sliding grooves on the top surface of the base 1, a protective frame 2 on both sides of the top surface of the base 1, and a heat insulation component 3 in the middle of the top surface of the base 1. The heat insulation component 3 comprises: a circular shell 301, a resistance heater 302, and a copper tube 303. The circular shell 301 is installed through and fixedly installed in the middle of the top surface of the base 1, the resistance heater 302 is fixedly installed inside the bottom end of the circular shell 301, and the copper tube 303 is fixed on the top surface of the resistance heater 302. U-shaped frame 4, U-shaped frame 4 is fixed inside the bottom of the base platform 1; Servo motor 5 is fixedly installed on the right side of U-shaped frame 4; A bidirectional screw 6 is installed through and rotatably on the left and right sides of the inner wall of the U-shaped frame 4. The right end of the bidirectional screw 6 is fixedly connected to the left end of the output shaft of the servo motor 5. Two inner threaded rings 7 are slidably installed on the outer wall of the bidirectional screw 6. Two non-self-locking threaded grooves are opened on the outer wall of the bidirectional screw 6. The two non-self-locking threaded grooves of the bidirectional screw 6 are in opposite directions. The inner walls of the two inner threaded rings 7 mesh with the outer walls of the two threaded grooves of the bidirectional screw 6. The frame plate 8 is fixed to the outer wall of the two inner threaded rings 7 respectively. The outer wall of the frame plate 8 slides in contact with the inner wall of the two sliding grooves of the base platform 1 respectively. The bottom surface of the frame plate 8 slides in contact with the inner bottom end of the U-shaped frame 4. Arc-shaped plate 9 is fixed on the top surface of two frame plates 8 respectively. Arc-shaped plate 9 is located above the base platform 1 and is used to clamp and position the cylinder liner metal mold. Guide rod 10 is fixed above the inner wall of U-shaped frame 4. Guide rod 10 is located above bidirectional screw 6. Insulation component 3 is located above guide rod 10. The support plate 8 is slidably mounted on the outer wall of the guide rod 10; Two springs 11 are respectively disposed between the inner wall of the guide rod 10 and the outer wall of the frame plate 8, and the two springs 11 are sleeved on the outside of the guide rod 10; When using this positioning device, the operator places the newly formed cylinder liner metal mold on top of the base platform 1, which supports the protective frame 2. Simultaneously, the operator starts the servo motor 5, causing its output shaft to rotate clockwise. This rotation drives the bidirectional screw 6 to rotate clockwise within the U-shaped frame 4. Under the constraint of the sliding groove on the base platform 1, the inner threaded ring 7 moves in opposite directions within the two threaded grooves of the bidirectional screw 6. The inner threaded ring 7 drives the support plate 8 to move to both sides. The support plate 8 moves to both sides within the two arc grooves on the base platform 1, and the support plate 8 drives the arc-shaped plate 9 to move to both sides. The two arc-shaped plates 9 are clamped inside the cylinder liner metal mold, achieving clamping and positioning of the high-temperature cylinder liner metal mold. Simultaneously, the U-shaped frame 4 supports the guide rod 10, and the support plate 8 moves to both sides on the guide rod 10. When the frame plate 8 moves, it drives the spring 11 to move to both sides. The spring 11 begins to contract, and under the elastic force of the spring 11, the speed at which the frame plate 8 moves to both sides is slowed down. The operator activates the heat preservation component 3, and the temperature of the resistance heater 302 in the circular shell 301 begins to rise. The resistance heater 302 transfers the temperature to the copper pipe 303, the copper pipe 303 transfers the temperature to the circular shell 301, and the circular shell 301 transfers the temperature to the inside of the cylinder liner metal mold, so that the arc plate 9 gently presses against the inside of the cylinder liner metal mold, while maintaining the temperature inside the cylinder liner metal mold. This prevents the cylinder liner metal mold from cooling and hardening during the subsequent casting process, thus avoiding the problem of poor casting effect of the cylinder liner metal mold on the positioning device caused by the cylinder liner metal mold cooling and hardening during the subsequent casting process.

[0034] The problem of deformation of the inner wall of the cylinder liner metal mold caused by excessively fast positioning and clamping leads to damage to the lower square shape of the cylinder liner metal mold; A slag collection device 12 is provided on the side of the two support plates 8 that are far apart from each other. The slag collection device 12 is used to prevent the waste residue from grinding the cylinder liner metal mold from falling into the bottom platform 1. A limit device 13 is provided on the inner wall of the slag collection device 12. The limit device 13 is used to limit the diameter of the arc plate 9.

[0035] Working principle: The newly formed cylinder liner metal mold is placed above the base platform 1. The output shaft of the servo motor 5 drives the bidirectional screw 6 to rotate forward. Under the constraint of the sliding groove of the base platform 1, the inner threaded ring 7 moves in opposite directions in the two threaded grooves of the bidirectional screw 6. The inner threaded ring 7 drives the support plate 8 to move to both sides. The support plate 8 moves to both sides in the two arc grooves of the base platform 1. The support plate 8 moves to both sides on the guide rod 10. The support plate 8 drives the spring 11 to move to both sides. The spring 11 contracts, slowing down the speed of the support plate 8 moving to both sides. The support plate 8 drives the arc plate 9 to move to both sides. The arc plate 9 is clamped inside the cylinder liner metal mold. The resistance heater 302 transfers the temperature to the copper tube 303. The copper tube 303 transfers the temperature to the round shell 301. The round shell 301 transfers the temperature to the inside of the cylinder liner metal mold, maintaining the temperature of the cylinder liner metal mold.

[0036] like Figure 1-8 As shown, based on the above embodiments, in another embodiment of the present invention, the slag collection device 12 includes: an L-shaped plate 121, which is fixed above the two frame plates 8 on opposite sides. Square box 122 is fixed to the bottom of the inside of two L-shaped plates 121. Square box 122 is located below two sliding grooves of base platform 1. A sliding groove is opened on both the front and back of square box 122. Two U-shaped plates 123 are fixed to the inner top of the base 1 respectively; Four round blocks 124 are fixed in a group to the front and back of the inner walls of the two U-shaped plates 123 respectively, and the outer walls of the four round blocks 124 slide in contact with the inner walls of the grooves of the two square boxes 122. The square box 122 is used to collect the waste residue from grinding the cylinder liner metal mold; As the support plate 8 moves to both sides on the guide rod 10, the support plate 8 drives the L-shaped plate 121 to move to both sides, and the L-shaped plate 121 drives the square box 122 to move to both sides. At the same time, the base platform 1 supports the U-shaped plate 123, the U-shaped plate 123 supports the round block 124, and the square box 122 slides to both sides on the round block 124. The square box 122 collects the waste residue that falls off during the casting of the cylinder liner metal mold. When the output shaft of the servo motor 5 is reset, the L-shaped plate 121 drives the square box 122 to move towards the center. The square box 122 moves to the bottom of the two sliding grooves of the base platform 1 for centralized processing of the waste residue, thereby avoiding the problem of the waste residue falling off during the casting of the cylinder liner metal mold falling into the bottom platform 1 and causing damage to the inside of the positioning device during use.

[0037] A support frame 125 is fixed to the bottom surface of each of the two square boxes 122. The bottom surfaces of the two support frames 125 slide in contact with the inner bottom end of the U-shaped frame 4. An arc shell 126 is fixed to the inner bottom end of each of the two support frames 125. A sponge block 127 is fixed to the inner wall of each of the two arc shells 126. The outer wall of the two sponge blocks 127 slides in contact with the outer wall of the bidirectional screw 6. The two sponge blocks 127 are filled with lubricating oil. While the L-shaped plate 121 moves the square box 122 to both sides, the square box 122 moves the support frame 125 to both sides, the support frame 125 moves the arc shell 126 to both sides, and the arc shell 126 moves the sponge block 127 to both sides. During the movement, the sponge block 127 wipes the surface of the bidirectional screw 6, thereby avoiding the problem of the positioning device not running smoothly due to the aging and rusting of the bidirectional screw 6 during use.

[0038] The limiting device 13 includes: a round rod 131, which passes through and is fixed to the inner walls of the two supports 125 at the front and rear respectively; Slider 132 is fixed to the front and back of the two round rods 131 respectively; U-shaped horizontal plate 133, U-shaped horizontal plate 133 is fixed to the bottom of the inside of U-shaped frame 4; Two concave plates 134 are fixed to the front and back of the inner wall of the U-shaped horizontal plate 133. The inner walls of the two concave plates 134 slide in contact with the outer wall of the slider 132, and the two concave plates 134 are used to limit the slider 132. While the support frame 125 moves the arc shell 126 to both sides, the support frame 125 also moves the round rod 131 to both sides. The round rod 131 moves the slider 132 to both sides. The U-shaped frame 4 supports the U-shaped horizontal plate 133, and the U-shaped horizontal plate 133 supports the concave plate 134. The slider 132 slides to both sides in the concave plate 134. The concave plate 134 limits the slider 132, restricting the distance that the two arc plates 9 move to both sides. This avoids the problem of the cylinder liner metal mold being broken and damaged below due to the arc plates 9 expanding and clamping the cylinder liner metal mold too long during the use of the positioning device.

[0039] Two ring blocks 135 are fixed to the outer walls of the two round rods 131 respectively, and a strip frame 136 is fixed to the outer walls of the four ring blocks 135 respectively. Two connecting plates 137 are fixed to the top surface of the four strip frames 136. The top surface of the two connecting plates 137 is fixedly connected to the bottom surface of the square box 122. The two connecting plates 137 are located on the side of the two L-shaped plates 121 that are far apart from each other. While the round rod 131 drives the slider 132 to move to both sides, the round rod 131 drives the ring block 135 to move to both sides, the ring block 135 drives the strip frame 136 to move to both sides, the strip frame 136 drives the connecting plate 137 to move to both sides, and the connecting plate 137 supports the square box 122 to move to both sides, thereby avoiding the problem of excessive vibration frequency of the positioning device caused by the shaking of the square box 122 during use.

[0040] Working principle: The frame plate 8 drives the L-shaped plate 121 to move to both sides, the L-shaped plate 121 drives the square box 122 to move to both sides, the U-shaped plate 123 supports the round block 124, the square box 122 slides to both sides on the round block 124, the square box 122 collects the waste residue that falls off during the casting of the cylinder liner metal mold, when the output shaft of the servo motor 5 is reset, the L-shaped plate 121 drives the square box 122 to move to the middle, the square box 122 moves to the bottom platform 1 below the two sliding grooves for centralized processing of waste residue; The square box 122 drives the support frame 125 to move to both sides, the support frame 125 drives the arc shell 126 to move to both sides, the arc shell 126 drives the sponge block 127 to move to both sides, and the sponge block 127 wipes the surface of the bidirectional screw 6 during the movement. The support frame 125 drives the round rod 131 to move to both sides, the round rod 131 drives the slider 132 to move to both sides, the U-shaped horizontal plate 133 supports the concave plate 134, the slider 132 slides to both sides in the concave plate 134, and the concave plate 134 limits the slider 132. The round rod 131 drives the ring block 135 to move to both sides, the ring block 135 drives the strip frame 136 to move to both sides, the strip frame 136 drives the connecting plate 137 to move to both sides, and the connecting plate 137 supports the square box 122 to move to both sides.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A positioning device for a cylinder liner metal mold, characterized in that, include: The base (1) has two sliding grooves on its top surface, and a protective frame (2) is provided on both sides of the top surface of the base (1). A heat insulation component (3) is provided in the middle of the top surface of the base (1). U-shaped frame (4), the U-shaped frame (4) is fixed inside the bottom of the base (1); Servo motor (5), the servo motor (5) is fixedly installed on the right side of the U-shaped frame (4); A bidirectional screw (6) is installed through and rotatably on the left and right sides of the inner wall of the U-shaped frame (4). The right end of the bidirectional screw (6) is fixedly connected to the left end of the output shaft of the servo motor (5). Two internal threaded rings (7) are slidably mounted on the outer wall of the bidirectional screw (6); The frame plate (8) is fixed to the outer wall of the two inner threaded rings (7); Arc-shaped plate (9), the arc-shaped plate (9) is fixed on the top surface of two frame plates (8) respectively, the arc-shaped plate (9) is used to clamp and position the cylinder liner metal mold; Guide rod (10), the guide rod (10) is fixed above the inner wall of the U-shaped frame (4); The frame plate (8) is slidably mounted on the outer wall of the guide rod (10); Two springs (11) are respectively disposed between the inner wall of the guide rod (10) and the outer wall of the frame plate (8); The heat insulation component (3) includes: a round shell (301), a resistance heater (302) and a copper tube (303). The round shell (301) is installed through and fixedly installed in the middle of the top surface of the base (1). The resistance heater (302) is fixedly installed inside the bottom of the round shell (301). The copper tube (303) is fixed on the top surface of the resistance heater (302).

2. The positioning device for a cylinder liner metal mold according to claim 1, characterized in that, The outer wall of the bidirectional screw (6) has two non-self-locking threaded grooves. The two non-self-locking threaded grooves of the bidirectional screw (6) are in opposite directions. The inner walls of the two inner threaded rings (7) mesh with the outer walls of the two threaded grooves of the bidirectional screw (6).

3. The positioning device for a cylinder liner metal mold according to claim 2, characterized in that, The outer wall of the frame plate (8) slides in contact with the inner wall of the two grooves of the base platform (1), the bottom surface of the frame plate (8) slides in contact with the inner bottom end of the U-shaped frame (4), and the two springs (11) are sleeved on the outside of the guide rod (10).

4. The positioning device for a cylinder liner metal mold according to claim 3, characterized in that, The insulation component (3) is located above the guide rod (10), the arc plate (9) is located above the base (1), and the guide rod (10) is located above the bidirectional screw (6).

5. The positioning device for a cylinder liner metal mold according to claim 4, characterized in that, A slag collection device (12) is provided on the side of the two racks (8) that are far apart from each other. The slag collection device (12) is used to prevent the waste residue from the grinding of the cylinder liner metal mold from falling into the bottom platform (1). The inner wall of the slag collection device (12) is provided with a limiting device (13), which is used to limit the diameter of the arc plate (9) clamping.

6. The positioning device for a cylinder liner metal mold according to claim 5, characterized in that, The slag collection device (12) includes: an L-shaped plate (121), which is fixed above the two frame plates (8) on opposite sides; A square box (122) is fixed to the bottom of the interior of two L-shaped plates (121). The square box (122) is located below two sliding grooves of the base (1). A sliding groove is opened on both the front and back of the square box (122). Two U-shaped plates (123) are fixed to the inner top of the base (1); Four circular blocks (124) are fixed in a group to the front and back of the inner walls of the two U-shaped plates (123), and the outer walls of the four circular blocks (124) slide in contact with the inner walls of the grooves of the two square boxes (122). The square box (122) is used to collect the waste residue from grinding the cylinder liner metal mold.

7. The positioning device for a cylinder liner metal mold according to claim 6, characterized in that, A support frame (125) is fixed to the bottom surface of each of the two square boxes (122). The bottom surfaces of the two support frames (125) slide in contact with the inner bottom of the U-shaped frame (4). An arc shell (126) is fixed to the inner bottom of each of the two support frames (125). A sponge block (127) is fixed to the inner wall of each of the two arc shells (126). The outer wall of the two sponge blocks (127) slides in contact with the outer wall of the bidirectional screw (6). The two sponge blocks (127) are filled with lubricating oil.

8. The positioning device for a cylinder liner metal mold according to claim 7, characterized in that, The limiting device (13) includes: a round rod (131), which passes through and is fixed to the inner walls of the two supports (125) at the front and back respectively; Slider (132), the slider (132) is fixed on the front and back of the two round rods (131) respectively; U-shaped horizontal plate (133), the U-shaped horizontal plate (133) is fixed to the bottom of the U-shaped frame (4); Two concave plates (134) are fixed to the front and back sides of the inner wall of the U-shaped horizontal plate (133); The inner walls of the two concave plates (134) slide in contact with the outer wall of the slider (132), and the two concave plates (134) are used to limit the slider (132).

9. The positioning device for a cylinder liner metal mold according to claim 8, characterized in that, Two ring blocks (135) are fixed to the outer walls of the two round rods (131), and a strip frame (136) is fixed to the outer walls of the four ring blocks (135). Two connecting plates (137) are fixed to the top surfaces of the four strip frames (136). The top surfaces of the two connecting plates (137) are fixedly connected to the bottom surface of the square box (122). The two connecting plates (137) are located on the side of the two L-shaped plates (121) that are far apart from each other.

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