Special equipment based on simultaneous necking of two ends of round pipe

Abstract

The invention relates to the technical field of round pipe necking equipment, in particular to special equipment based on simultaneous necking of two ends of a round pipe, which comprises a material receiving table and a material blocking frame, and the material blocking frame is arranged at the top end of the material receiving table in an up-and-down sliding manner; the device further comprises a centering device, a conveying device, a necking device, a power device, a second material receiving table, a first lifting frame, a third material receiving table and a second lifting frame, the second material receiving table is arranged on the side portion of the material receiving table, the first lifting frame is installed on the outer side wall of the second material receiving table in an up-down sliding mode, and the third material receiving table is arranged on the side portion of the second material receiving table. The second lifting frame is installed on the outer side wall of the third material receiving table in an up-down sliding mode, and the centering device is arranged on the third material receiving table and used for centering the round pipe. The working efficiency and the using convenience are improved, the labor intensity of workers is reduced, the coaxiality is obviously improved compared with single-head necking forming by necking the two ends of the round pipe at the same time in the normal-temperature state, the coaxiality reaches 0.3 mm or below, and the rate of finished products is increased.

Description

Technical Field

[0001] The invention relates to the technical field of round tube shrinking equipment, in particular to a special equipment based on simultaneous shrinking of both ends of a round tube. Background Art

[0002] Metal round tube shrinking is a commonly used production process. It reduces the outer diameter of the end of the round tube to adapt it to shafts and tube parts with smaller diameters. It is widely used in various types of pipelines, automobile axle shafts and other products.

[0003] For small diameter and thin wall tubes, which are light in weight and have small shrinking force, the shrinking equipment usually adopts double-end alternating shrinking and automatic loading and unloading. For large diameter and thick wall tubes, they are mostly heated and then double-ended shrinking, which has poor precision. Due to the heavy weight of the product, single-piece manual loading and unloading is mostly adopted, which has low efficiency.

[0004] For example, the patent with the prior art authorization announcement number CN215392111U discloses a round tube shrinking device, including a main body, a fixing frame is fixedly installed on one side of the top end of the main body, a lower fixing seat is fixedly installed on one side of the bottom end of the fixing frame, and a first hydraulic cylinder is fixedly installed just above the lower fixing seat, the bottom end of the first hydraulic cylinder is fixedly connected to the upper fixing seat, a lower fixing mold and an upper fixing mold are fixedly installed on the top of the lower fixing seat and the bottom of the upper fixing seat respectively, a fixing plate is fixedly installed on one side of the main body close to the lower fixing seat, and a movable seat is installed between the fixing plate and the lower fixing seat on the main body, a second hydraulic cylinder is fixedly connected to one side of the fixing plate, and an output shaft on one side of the second hydraulic cylinder is fixedly connected to the movable seat.

[0005] However, during the use of the device, it was found that the device requires personnel to manually load or unload the round tube, which increases the labor intensity of the personnel and reduces the convenience of use. In addition, the device adopts a one-end shrinking method, which is less efficient, and the round tube is prone to displacement during the shrinking process, which reduces the processing accuracy. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a special equipment based on simultaneous shrinking of both ends of a round tube, which improves work efficiency and ease of use, reduces labor intensity of personnel, and significantly improves the coaxiality compared with single-head shrinking molding by simultaneously shrinking the two ends of a round tube at room temperature, and the coaxiality reaches below 0.3 mm, thereby improving the yield.

[0007] The conveying device is arranged above the third material receiving platform, and the conveying device is used to move and transport the round tube, and the shrinking device is used to shrink the two ends of the round tube at the same time, and the power device is used to drive the blocking frame, the first lifting frame and the second lifting frame to move up and down; the round tube that needs to be shrunken is placed on the top of the material receiving platform, and the round tube located at the front end rolls to the top of the first lifting frame under the action of gravity, and the first lifting frame is driven by the power device to move upward, so that the first lifting frame can lift the round tube at the top of the material receiving platform The tubes are lifted up and transported to the top of the second receiving table in turn, so that the round tubes are laid flat on the top of the second receiving table, and then the second lifting frame is driven by the power device to move upward, so that the second lifting frame lifts the round tube at the front end position of the second receiving table to the top of the third receiving table, and then the centering device is started to center the round tube at the top of the third receiving table, and then the round tube at the top of the third receiving table is transported to the shrinking device through the conveying device, and the two ends of the round tube are simultaneously shrinked by the shrinking device, and the shrinked round tube is transported and unloaded through the conveying device, thus completing a working cycle, and at the same time, the first lifting frame and the second lifting frame continuously transport the round tube to the third receiving table, and the round tube is loaded and transported to the shrinking device again through the conveying device, and multiple cycles can complete the production of multiple round tubes, improve the working efficiency and convenience of equipment, reduce the labor intensity of personnel, and shrink the two ends of the round tube at room temperature at the same time. The coaxiality is significantly improved compared with single-head shrinking molding, and the coaxiality reaches below 0.3mm, which improves the yield rate and greatly improves the production efficiency by 80%.

[0008] Preferably, the centering device includes a first base, a first guide rail, a second guide rail, a base, two sets of pulleys, a belt, a first pushing block, a second pushing block, a second hydraulic cylinder and a connecting piece. The first base is installed on the outer side wall of the third receiving platform, the first guide rail and the second guide rail are respectively installed on the outer side wall of the first base, the base is installed on the outer side wall of the first base, the two sets of pulleys are respectively rotatably installed on the inner side wall of the base, the belt is sleeved on the outer side walls of the two sets of pulleys, the first pushing block is installed on the upper part of the outer side wall of the belt, the second pushing block is installed on the lower part of the outer side wall of the belt, the fixed end of the second hydraulic cylinder is installed on the outer side wall of the first base, and the movable end of the second hydraulic cylinder is connected to the connecting piece. , the outer wall of the connecting piece is connected to the outer wall of the belt; when the conveying device places the round tube on the top of the third receiving platform, the second hydraulic cylinder pushes the connecting piece to move, so that the connecting piece drives the belt to move circumferentially. After the belt moves circumferentially, it drives the first pushing block and the second pushing block to move closer to each other, so that the first pushing block and the second pushing block push the two ends of the round tube to center the round tube on the third receiving platform, and then the moving end of the second hydraulic cylinder shrinks and moves, so that the first pushing block and the second pushing block are separated from the two ends of the round tube, and then the centered round tube is picked up and conveyed by the conveying device, thereby improving the convenience of centering the round tube before conveying, and improving the accuracy of simultaneous shrinking processing at both ends of the round tube.

[0009] Preferably, the shrinking device includes a clamping device, a second base, multiple groups of guide columns, two groups of push plates, two groups of third hydraulic cylinders and two groups of shrinking molds. The second base is arranged on the side of the third receiving platform, both ends of the multiple groups of guide columns are installed on the outer side wall of the second base, the two groups of push plates are slidably installed on the outer side walls of the multiple groups of guide columns, the fixed ends of the two groups of third hydraulic cylinders are installed on the outer side wall of the second base, the moving ends of the two groups of third hydraulic cylinders are connected to the outer side walls of the two groups of push plates respectively, the two groups of shrinking molds are respectively installed on the outer side walls of the two groups of push plates opposite to each other, the clamping device is installed in the middle of the second base, and the clamping device is used to clamp and fix the round tube; the conveying device conveys the centered round tube to the clamping device, and the round tube is centered by the clamping device The two push plates are clamped and fixed at the ends, and then the two push plates are pushed by two sets of third hydraulic cylinders to move quickly toward each other. When the two sets of shrinking molds are close to the two ends of the round tube, they move slowly, so that the two sets of shrinking molds are first sleeved on the outside of the two ends of the round tube. As the shrinking molds at both ends continue to approach each other and advance the depth, the two sets of shrinking molds shrink the two ends of the round tube at the same time. Then the two push plates return and reset, so as to improve the shrinking efficiency of the round tube. Since there must be deviations in the shrinking deformation resistance at both ends of the round tube, and since the round tube is fixed by the clamping device, the shrinking mold that reaches the feed depth first stops moving and only plays a supporting role. When the shrinking molds at both ends reach the feed depth, they return to the initial position, so as to improve the processing quality and precision of the round tube shrinking.

[0010] Preferably, the clamping device includes a clamping seat, two groups of fourth hydraulic cylinders, two groups of first clamping members and two groups of second clamping members, the clamping seat is installed in the middle of the outer side wall of the second base, the fixed ends of the two groups of fourth hydraulic cylinders are respectively installed on the outer side wall of the clamping seat, the two groups of first clamping members are respectively installed on the movable ends of the two groups of fourth hydraulic cylinders, the two groups of second clamping members are both installed on the inner side wall of the clamping seat, and the two groups of second clamping members correspond to the positions of the two groups of first clamping members respectively; the conveying device places the round tube between the two groups of first clamping members and the two groups of second clamping members, and pushes the two groups of first clamping members to move through the two groups of fourth hydraulic cylinders, so that the two groups of first clamping members cooperate with the two groups of second clamping members to clamp and fix the middle part of the round tube, thereby improving the stability of the shrinking processing at both ends of the round tube, and by adopting a horizontal clamping structure, it is convenient to open the space above the equipment, thereby improving the convenience of the conveying device for conveying the round tube.

[0011] Preferably, the conveying device includes a driving device, a bracket, a crossbeam, two groups of third guide rails, two groups of sliders and two groups of electro-permanent magnetic suction cups. The crossbeam is installed on the outer side wall of the bracket, the two groups of third guide rails are respectively installed on the outer side walls of the crossbeam, the two groups of sliders are respectively slidably installed on the outer side walls of the two groups of third guide rails, and the two groups of electro-permanent magnetic suction cups are respectively installed under the two groups of sliders through the driving device, and the driving device is used to drive the two groups of sliders and the two groups of electro-permanent magnetic suction cups to move positions; when the round tube is centered on the top of the third receiving table, the first group of sliders are driven to move positions through the driving device, so that the first group of sliders drive the first group of electro-permanent magnetic suction cups to move to the top of the round tube, and then the first group of electro-permanent magnetic suction cups are driven by the driving device. The magnetic suction cup moves downward, so that the first group of electric permanent magnetic suction cups absorbs and picks up the round tube, and then the first group of electric permanent magnetic suction cups are moved to transport the round tube to the clamping device. When the shrinkage of both ends of the round tube is completed, the second group of sliders are driven by the driving device to move the position, so that the second group of sliders drive the second group of electric permanent magnetic suction cups to move to the round tube after the shrinkage is completed and pick it up, and then the second group of electric permanent magnetic suction cups are used to transport the shrunken round tube for unloading, and at the same time, the first group of electric permanent magnetic suction cups are moved again to the top of the third receiving table to pick up the round tube, thereby improving the convenience of the equipment for automatic loading and unloading of round tubes, reducing the labor intensity of personnel, and improving work efficiency.

[0012] Preferably, the driving device comprises two groups of first racks, two groups of first motors, two groups of second motors, two groups of vertical beams and two groups of second racks, the two groups of first racks are respectively mounted on the outer side walls of the cross beams, the two groups of first motors are respectively mounted on the outer side walls of the two groups of sliders, the output ends of the two groups of first motors are respectively provided with first gears, the two groups of first gears are respectively meshed with the two groups of first racks, the two groups of second motors are respectively mounted on the outer side walls of the two groups of sliders, the output ends of the two groups of second motors are respectively provided with second gears, the two groups of vertical beams are respectively slidably mounted on the two groups of sliders up and down, the two groups of second racks are respectively mounted on the outer side walls of the two groups of vertical beams, the two groups of second racks are respectively meshed with the two groups of second gears, and the two groups of electric permanent magnetic suction cups are respectively mounted on the bottom ends of the two groups of vertical beams; the two groups of first gears are driven to rotate by the two groups of first motors, so that the two groups of first gears drive the two groups of sliders to move horizontally through the two groups of first racks, and the two groups of second gears are driven to rotate by the two groups of second motors, so that the two groups of second gears drive the two groups of vertical beams to move up and down through the two groups of second racks, thereby improving the flexibility of the moving position of the two groups of electric permanent magnetic suction cups.

[0013] Preferably, it also includes multiple groups of hydraulic buffers, which are respectively arranged at the bottom ends of the two groups of vertical beams, and the bottom ends of the multiple groups of hydraulic buffers are respectively connected to the top ends of the two groups of electro-permanent magnetic suction cups; by arranging multiple groups of hydraulic buffers, the buffering effect when the two groups of electro-permanent magnetic suction cups contact the circular tube is improved.

[0014] Preferably, the top of the receiving platform and the top of the second receiving platform are respectively arranged as inclined surfaces, so as to improve the convenience of rolling transportation of the round tube after being placed on the receiving platform and the second receiving platform.

[0015] Preferably, it also includes two groups of fifth hydraulic cylinders, which are respectively installed at the bottom ends of the two groups of vertical beams; when the two groups of electro-permanent magnetic suction cups are powered off, the two groups of electro-permanent magnetic suction cups still have magnetic force to adsorb the round tube, and at this time the round tube is pushed downward by the fifth hydraulic cylinder to separate the round tube from the electro-permanent magnetic suction cups. By setting the electro-permanent magnetic suction cups, the effect of adsorbing the round tube after the equipment is powered off is improved, thereby improving the reliability of picking up the round tube.

[0016] Preferably, the power device includes three groups of first hydraulic cylinders, which are respectively installed on the outer walls of the material receiving platform, the second material receiving platform and the third material receiving platform, and the moving ends of the three groups of first hydraulic cylinders are respectively connected to the material blocking rack, the first lifting rack and the second lifting rack; by controlling the telescopic adjustment of the moving ends of the three groups of first hydraulic cylinders, the convenience of the material blocking rack, the first lifting rack and the second lifting rack in lifting and moving for the round tube material blocking and transportation is improved.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the round tube that needs to be shrinked is placed on the top of the receiving platform, and the round tube at the front end is rolled to the top of the first lifting frame under the action of gravity, and the first lifting frame is driven upward by the power device, so that the first lifting frame lifts the round tube at the top of the receiving platform upward and conveys it to the top of the second receiving platform in turn, so that the round tube is laid flat on the top of the second receiving platform, and then the second lifting frame is driven upward by the power device, so that the second lifting frame lifts the round tube at the front end position of the second receiving platform upward to the top of the third receiving platform, and then the centering device is started to center the round tube at the top of the third receiving platform, and then the third receiving platform is laid flat on the top of the second receiving platform. The round tube on the top of the material table is transported to the shrinking device, and the two ends of the round tube are shrinked at the same time through the shrinking device. The shrunken round tube is transported and unloaded through the conveying device, thus completing a working cycle. At the same time, the first lifting frame and the second lifting frame continuously transport the round tube to the third receiving table, and the round tube is again transported to the shrinking device through the conveying device. Multiple cycles can complete the production of multiple round tubes, improve the working efficiency and convenience of the equipment, and reduce the labor intensity of personnel. By shrinking the two ends of the round tube at room temperature at the same time, the coaxiality is significantly improved compared with single-head shrinking molding, and the coaxiality reaches below 0.3mm, which improves the yield rate and greatly improves the production efficiency by 80%. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the axonometric structure of the present invention; Figure 2 It is a schematic diagram of the axonometric partial structure of the connection between the material receiving platform and the material blocking frame; Figure 3 It is a schematic diagram of the partial axonometric structure of the connection between the third receiving platform and the first base; Figure 4 It is a schematic diagram of the partial axonometric structure of the connection between the receiving platform and the first hydraulic cylinder, etc.; Figure 5 is an axonometric partial structural diagram of the connection between the second lifting frame and the first hydraulic cylinder, etc.; Figure 6 It is a schematic diagram of the axonometric local structure of the connection between the base and the pulley, etc.; Figure 7 It is a schematic diagram of the axonometric partial structure of the connection between the push plate and the shrinking die; Figure 8 It is a schematic diagram of the axonometric partial structure of the connection between the second base and the guide column, etc.; Fig. 9 It is a schematic diagram of the partial isometric structure of the connection between the clamping seat and the second clamping member; Fig.10 is a schematic diagram of an axonometric partial structure of the connection between the fourth hydraulic cylinder and the first clamping member; Fig.11 It is a schematic diagram of the axonometric local structure of the connection between the crossbeam and the third guide rail, etc.; Fig.12 It is a schematic diagram of the axonometric local structure of the connection between the bracket and the beam, etc.; Fig.13 It is a schematic diagram of the axonometric partial structure of the connection between the electric permanent magnetic chuck and the hydraulic buffer.

[0019] Markings in the attached drawings: 101, receiving platform; 102, material blocking frame; 103, second receiving platform; 104, first lifting frame; 105, third receiving platform; 106, second lifting frame; 107, first hydraulic cylinder; 201, first base; 202, first guide rail; 203, second guide rail; 204, base; 205, pulley; 206, belt; 207, first push block; 208, second push block; 209, second hydraulic cylinder; 210, connecting piece; 301, second base; 302 , guide column; 303, push plate; 304, third hydraulic cylinder; 305, shrinking mold; 401, clamping seat; 402, fourth hydraulic cylinder; 403, first clamping member; 404, second clamping member; 501, bracket; 502, crossbeam; 503, third guide rail; 504, slider; 505, electric permanent magnetic chuck; 601, first rack; 602, first motor; 603, second motor; 604, vertical beam; 605, second rack; 701, hydraulic buffer; 801, fifth hydraulic cylinder. DETAILED DESCRIPTION

[0020] In order to facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive. Example 1

[0021] The present invention discloses a special device for shrinking both ends of a round tube simultaneously, comprising a receiving platform 101 and a material blocking frame 102, wherein the material blocking frame 102 is slidably arranged at the top of the receiving platform 101; and further comprising a centering device, a conveying device, a shrinking device, a power device, a second receiving platform 103, a first lifting frame 104, a third receiving platform 105, and a second lifting frame 106, wherein the second receiving platform 103 is arranged at the side of the receiving platform 101, and the first lifting frame 104 is slidably arranged at the outer wall of the second receiving platform 103. The third receiving platform 105 is arranged on the side of the second receiving platform 103, the second lifting frame 106 is slidably installed on the outer wall of the third receiving platform 105, the centering device is arranged on the third receiving platform 105, the centering device is used to center the round tube, the conveying device is arranged above the third receiving platform 105, the conveying device is used to move and convey the round tube, the shrinking device is used to shrink both ends of the round tube at the same time, and the power device is used to drive the blocking frame 102, the first lifting frame 104 and the second lifting frame 106 to move up and down; The centering device includes a first base 201, a first guide rail 202, a second guide rail 203, a base 204, two sets of pulleys 205, a belt 206, a first push block 207, a second push block 208, a second hydraulic cylinder 209 and a connecting member 210. The first base 201 is installed on the outer wall of the third receiving platform 105, the first guide rail 202 and the second guide rail 203 are respectively installed on the outer wall of the first base 201, and the base 204 is installed on the outer wall of the first base 201. , two groups of pulleys 205 are rotatably mounted on the inner wall of the base 204 respectively, the belt 206 is sleeved on the outer wall of the two groups of pulleys 205, the first push block 207 is mounted on the upper part of the outer wall of the belt 206, the second push block 208 is mounted on the lower part of the outer wall of the belt 206, the fixed end of the second hydraulic cylinder 209 is mounted on the outer wall of the first base 201, the moving end of the second hydraulic cylinder 209 is connected to the connecting member 210, and the outer wall of the connecting member 210 is connected to the outer wall of the belt 206; In this embodiment, the round tube that needs to be shrinked is placed on the top of the receiving platform 101, and the round tube at the front end is rolled to the top of the first lifting frame 104 by gravity. The first lifting frame 104 is driven upward by the power device, so that the first lifting frame 104 lifts the round tube at the top of the receiving platform 101 upward and transports it to the top of the second receiving platform 103 in turn, so that the round tube is laid flat on the top of the second receiving platform 103, and then the second lifting frame 106 is driven upward by the power device, so that the second lifting frame 106 lifts the round tube at the front end position on the second receiving platform 103 upward to the top of the third receiving platform 105, and then the centering device is started to center the round tube at the top of the third receiving platform 105, and then the conveyor The conveying device conveys the round tube at the top of the third receiving platform 105 to the shrinking device, and the shrinking device shrinks both ends of the round tube at the same time. The shrunken round tube is transported and unloaded through the conveying device, and a working cycle is completed. At the same time, the first lifting frame 104 and the second lifting frame 106 continuously convey the round tube to the third receiving platform 105, and the round tube is again transported to the shrinking device through the conveying device. Multiple cycles can complete the production of multiple round tubes, improve the working efficiency and convenience of equipment, and reduce the labor intensity of personnel. By shrinking both ends of the round tube at room temperature at the same time, the coaxiality is significantly improved compared with single-head shrinking molding, and the coaxiality reaches below 0.3mm, which improves the yield rate and greatly improves the production efficiency by 80%. Example 2

[0022] On the basis of Example 1, a special device based on the simultaneous shrinking of both ends of a round tube of the present invention comprises a clamping device, a second base 301, multiple groups of guide columns 302, two groups of push plates 303, two groups of third hydraulic cylinders 304 and two groups of shrinking molds 305. The second base 301 is arranged on the side of the third receiving platform 105, and both ends of the multiple groups of guide columns 302 are mounted on the outer wall of the second base 301, and the two groups of push plates 303 are respectively slidably mounted on the outer walls of the multiple groups of guide columns 302, and the fixed ends of the two groups of third hydraulic cylinders 304 are both mounted on the outer wall of the second base 301, and the moving ends of the two groups of third hydraulic cylinders 304 are respectively connected to the outer walls of the two groups of push plates 303, and the two groups of shrinking molds 305 are respectively mounted on the outer walls of the two groups of push plates 303 in opposite directions. The clamping device is installed in the middle of the second base 301, and the clamping device is used to clamp and fix the round tube; The clamping device comprises a clamping seat 401, two groups of fourth hydraulic cylinders 402, two groups of first clamping members 403 and two groups of second clamping members 404. The clamping seat 401 is mounted on the middle of the outer wall of the second base 301. The fixed ends of the two groups of fourth hydraulic cylinders 402 are respectively mounted on the outer wall of the clamping seat 401. The two groups of first clamping members 403 are respectively mounted on the moving ends of the two groups of fourth hydraulic cylinders 402. The two groups of second clamping members 404 are both mounted on the inner wall of the clamping seat 401, and the positions of the two groups of second clamping members 404 correspond to those of the two groups of first clamping members 403. The conveying device includes a driving device, a bracket 501, a crossbeam 502, two sets of third guide rails 503, two sets of sliders 504 and two sets of electric permanent magnetic chucks 505, the crossbeam 502 is installed on the outer wall of the bracket 501, the two sets of third guide rails 503 are respectively installed on the outer wall of the crossbeam 502, the two sets of sliders 504 are respectively slidably installed on the outer walls of the two sets of third guide rails 503, and the two sets of electric permanent magnetic chucks 505 are respectively installed under the two sets of sliders 504 through the driving device, and the driving device is used to drive the two sets of sliders 504 and the two sets of electric permanent magnetic chucks 505 to move positions; The driving device includes two groups of first racks 601, two groups of first motors 602, two groups of second motors 603, two groups of vertical beams 604 and two groups of second racks 605, the two groups of first racks 601 are respectively mounted on the outer side walls of the cross beam 502, the two groups of first motors 602 are respectively mounted on the outer side walls of the two groups of sliders 504, the output ends of the two groups of first motors 602 are respectively provided with first gears, the two groups of first gears are respectively meshed with the two groups of first racks 601, the two groups of second motors 603 are respectively mounted on the outer side walls of the two groups of sliders 504, the output ends of the two groups of second motors 603 are respectively provided with second gears, the two groups of vertical beams 604 are respectively slidably mounted on the two groups of sliders 504, the two groups of second racks 605 are respectively mounted on the outer side walls of the two groups of vertical beams 604, the two groups of second racks 605 are respectively meshed with the two groups of second gears, and the two groups of electric permanent magnetic chucks 505 are respectively mounted on the bottom ends of the two groups of vertical beams 604; It also includes multiple groups of hydraulic buffers 701, which are respectively arranged at the bottom ends of the two groups of vertical beams 604, and the bottom ends of the multiple groups of hydraulic buffers 701 are respectively connected to the top ends of the two groups of electric permanent magnetic chucks 505; The top of the receiving platform 101 and the top of the second receiving platform 103 are respectively configured as inclined surfaces; It also includes two groups of fifth hydraulic cylinders 801, which are respectively installed at the bottom ends of the two groups of vertical beams 604; The power device includes three groups of first hydraulic cylinders 107, which are respectively installed on the outer side walls of the material receiving platform 101, the second material receiving platform 103 and the third material receiving platform 105, and the moving ends of the three groups of first hydraulic cylinders 107 are respectively connected to the material blocking frame 102, the first lifting frame 104 and the second lifting frame 106; In this embodiment, after the conveying device places the round tube on the top of the third receiving platform 105, the second hydraulic cylinder 209 pushes the connecting piece 210 to move, so that the connecting piece 210 drives the belt 206 to move circumferentially. After the belt 206 moves circumferentially, it drives the first pushing block 207 and the second pushing block 208 to move closer to each other, so that the first pushing block 207 and the second pushing block 208 push the two ends of the round tube to align the position of the round tube on the third receiving platform 105. Then, the moving end of the second hydraulic cylinder 209 retracts and moves, so that the first pushing block 207 and the second pushing block 208 are separated from the two ends of the round tube. Subsequently, the centered round tube is picked up and conveyed by the conveying device, thereby improving the convenience of centering the round tube before conveying, and improving the accuracy of simultaneous shrinking processing at both ends of the round tube. The conveying device conveys the centered round tube to the clamping device. The middle part of the round tube is clamped and fixed by the clamping device, and then the two groups of push plates 303 are pushed by two groups of third hydraulic cylinders 304 to move quickly towards each other. When the two groups of shrinking molds 305 are close to the two ends of the round tube, they are slowly moved so that the two groups of shrinking molds 305 are first sleeved on the outside of the two ends of the round tube. As the shrinking molds 305 at both ends continue to approach each other to the feed depth, the two groups of shrinking molds 305 shrink the two ends of the round tube at the same time. Then the two groups of push plates 303 return to reset, so as to improve the shrinking processing efficiency of the round tube. Since there must be deviations in the shrinking deformation resistance at both ends of the round tube, and since the round tube is fixed by the clamping device, the shrinking mold 305 that reaches the feed depth first stops moving and only plays a supporting role. When the shrinking molds 305 at both ends reach the feed depth, they return to the initial position, so as to improve the processing quality and accuracy of the shrinking of the round tube.

[0023] like Figures 1 to 13As shown, a special device based on the simultaneous shrinking of both ends of a round tube of the present invention, when working, places the round tube that needs shrinking processing on the top of the receiving platform 101, and the round tube at the front end is rolled to the top of the first lifting frame 104 by gravity, and the first lifting frame 104 is driven by the power device to move upward, so that the first lifting frame 104 lifts the round tube at the top of the receiving platform 101 upward and transports it to the top of the second receiving platform 103 in turn, so that the round tube is laid flat on the top of the second receiving platform 103, and then the second lifting frame 106 is driven by the power device to move upward, so that the second lifting frame 106 lifts the round tube at the top of the second receiving platform 103 upward and transports it to the top of the second receiving platform 103. The round tube at the correct position is lifted up to the top of the third receiving platform 105, and then the centering device is started to center the round tube at the top of the third receiving platform 105, and then the round tube at the top of the third receiving platform 105 is transported to the shrinking device by the conveying device, and the two ends of the round tube are simultaneously shrunken by the shrinking device, and the shrunken round tube is transported and unloaded by the conveying device, thus completing a working cycle. At the same time, the first lifting frame 104 and the second lifting frame 106 continuously transport the round tube to the third receiving platform 105, and the round tube is again transported to the shrinking device by the conveying device, and the production of multiple round tubes can be completed by multiple cycles.

[0024] The first hydraulic cylinder 107, the second hydraulic cylinder 209, the third hydraulic cylinder 304, the fourth hydraulic cylinder 402, the electric permanent magnetic suction cup 505, the first motor 602, the second motor 603, the hydraulic buffer 701 and the fifth hydraulic cylinder 801 of the special equipment based on the simultaneous shrinking of the double ends of a round tube of the present invention are purchased on the market. The technicians in this industry only need to install and operate them according to the accompanying instruction manual, without the need for the technicians in this field to make creative efforts.

[0025] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A special device based on the simultaneous shrinking of both ends of a round tube, comprising a material receiving platform (101) and a material blocking frame (102), wherein the material blocking frame (102) is slidably arranged on the top of the material receiving platform (101); characterized in that: The invention also includes a centering device, a conveying device, a shrinking device, a power device, a second material receiving platform (103), a first lifting frame (104), a third material receiving platform (105) and a second lifting frame (106), wherein the second material receiving platform (103) is arranged on the side of the material receiving platform (101), the first lifting frame (104) is slidably mounted on the outer wall of the second material receiving platform (103), the third material receiving platform (105) is arranged on the side of the second material receiving platform (103), the second lifting frame (106) is slidably mounted on the outer wall of the third material receiving platform (105), the centering device is arranged on the third material receiving platform (105), the centering device is used to center the round tube, the conveying device is arranged above the third material receiving platform (105), the conveying device is used to move and convey the round tube, the shrinking device is used to shrink both ends of the round tube at the same time, and the power device is used to drive the material blocking frame (102), the first lifting frame (104) and the second lifting frame (106) to move up and down.

2. A special device based on simultaneous shrinking of both ends of a round tube as claimed in claim 1, characterized in that: The centering device comprises a first base (201), a first guide rail (202), a second guide rail (203), a base (204), two sets of pulleys (205), a belt (206), a first pushing block (207), a second pushing block (208), a second hydraulic cylinder (209) and a connecting member (210); the first base (201) is mounted on an outer wall of the third receiving platform (105); the first guide rail (202) and the second guide rail (203) are respectively mounted on the outer wall of the first base (201); and the base (204) is mounted on the outer wall of the first base (201). On the side wall, two groups of pulleys (205) are rotatably mounted on the inner side wall of the base (204), the belt (206) is sleeved on the outer side walls of the two groups of pulleys (205), the first pushing block (207) is mounted on the upper part of the outer side wall of the belt (206), the second pushing block (208) is mounted on the lower part of the outer side wall of the belt (206), the fixed end of the second hydraulic cylinder (209) is mounted on the outer side wall of the first base (201), the movable end of the second hydraulic cylinder (209) is connected to the connecting member (210), and the outer side wall of the connecting member (210) is connected to the outer side wall of the belt (206).

3. A special device based on simultaneous shrinking of both ends of a round tube as claimed in claim 1, characterized in that: The shrinking device comprises a clamping device, a second base (301), multiple groups of guide columns (302), two groups of push plates (303), two groups of third hydraulic cylinders (304) and two groups of shrinking molds (305). The second base (301) is arranged on the side of the third material receiving platform (105). Both ends of the multiple groups of guide columns (302) are mounted on the outer wall of the second base (301). The two groups of push plates (303) are respectively slidably mounted on the outer walls of the multiple groups of guide columns (302). The fixed ends of the two groups of third hydraulic cylinders (304) are both mounted on the outer wall of the second base (301). The movable ends of the two groups of third hydraulic cylinders (304) are respectively connected to the outer walls of the two groups of push plates (303). The two groups of shrinking molds (305) are respectively mounted on the outer walls of the two groups of push plates (303) facing each other. The clamping device is mounted in the middle of the second base (301). The clamping device is used to clamp and fix the round tube.

4. A special device based on simultaneous shrinking of both ends of a round tube as claimed in claim 3, characterized in that: The clamping device comprises a clamping seat (401), two groups of fourth hydraulic cylinders (402), two groups of first clamping members (403) and two groups of second clamping members (404); the clamping seat (401) is mounted on the middle part of the outer side wall of the second base (301); the fixed ends of the two groups of fourth hydraulic cylinders (402) are respectively mounted on the outer side wall of the clamping seat (401); the two groups of first clamping members (403) are respectively mounted on the movable ends of the two groups of fourth hydraulic cylinders (402); the two groups of second clamping members (404) are both mounted on the inner side wall of the clamping seat (401); and the positions of the two groups of second clamping members (404) correspond to those of the two groups of first clamping members (403).

5. The special equipment based on simultaneous shrinking of both ends of a round tube as claimed in claim 1, characterized in that: The conveying device comprises a driving device, a bracket (501), a crossbeam (502), two groups of third guide rails (503), two groups of sliders (504) and two groups of electric permanent magnetic suction cups (505); the crossbeam (502) is mounted on the outer wall of the bracket (501); the two groups of third guide rails (503) are respectively mounted on the outer wall of the crossbeam (502); the two groups of sliders (504) are respectively slidably mounted on the outer walls of the two groups of third guide rails (503); the two groups of electric permanent magnetic suction cups (505) are respectively mounted below the two groups of sliders (504) through the driving device; the driving device is used to drive the two groups of sliders (504) and the two groups of electric permanent magnetic suction cups (505) to move positions.

6. A special device based on simultaneous shrinking of both ends of a round tube as claimed in claim 5, characterized in that: The driving device comprises two groups of first racks (601), two groups of first motors (602), two groups of second motors (603), two groups of vertical beams (604) and two groups of second racks (605), the two groups of first racks (601) are respectively mounted on the outer side walls of the horizontal beams (502), the two groups of first motors (602) are respectively mounted on the outer side walls of the two groups of sliders (504), the output ends of the two groups of first motors (602) are respectively provided with first gears, the two groups of first gears are respectively connected to the two groups of first racks (601) The two sets of second motors (603) are respectively mounted on the outer side walls of the two sets of sliders (504); the output ends of the two sets of second motors (603) are respectively provided with second gears; the two sets of vertical beams (604) are respectively mounted on the two sets of sliders (504) so ​​as to slide up and down; the two sets of second racks (605) are respectively mounted on the outer side walls of the two sets of vertical beams (604); the two sets of second racks (605) are respectively meshed with the two sets of second gears; and the two sets of electro-permanent magnetic chucks (505) are respectively mounted on the bottom ends of the two sets of vertical beams (604).

7. A special device based on simultaneous shrinking of both ends of a round tube as described in claim 5 or 6, characterized in that: It also includes a plurality of groups of hydraulic buffers (701), which are respectively arranged at the bottom ends of the two groups of vertical beams (604), and the bottom ends of the plurality of groups of hydraulic buffers (701) are respectively connected to the top ends of the two groups of electro-permanent magnetic suction cups (505).

8. The special equipment based on simultaneous shrinking of both ends of a round tube as claimed in claim 1, characterized in that: The top end of the material receiving platform (101) and the top end of the second material receiving platform (103) are respectively arranged as inclined surfaces.

9. The special equipment based on simultaneous shrinking of both ends of a round tube as claimed in claim 6, characterized in that: It also includes two groups of fifth hydraulic cylinders (801), which are respectively installed at the bottom ends of the two groups of vertical beams (604).

10. The special equipment based on simultaneous shrinking of both ends of a round tube as claimed in claim 1, characterized in that: The power device comprises three groups of first hydraulic cylinders (107), the three groups of first hydraulic cylinders (107) are respectively installed on the outer side walls of the material receiving platform (101), the second material receiving platform (103) and the third material receiving platform (105), and the moving ends of the three groups of first hydraulic cylinders (107) are respectively connected to the material blocking frame (102), the first lifting frame (104) and the second lifting frame (106).

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