Manufacturing Equipment and Method for Octagonal Copper Tubes of High-Casting-Speed Permanent Mold Casting Equipment

Abstract

The present invention relates to the field of machining, specifically to a manufacturing device and method for an octagonal copper tube of a high casting speed metal mold casting device, including a track table. A stretching die is arranged inside the track table. A traction trolley and a pushing trolley are respectively arranged on both sides of the stretching die. A rope transmission mechanism is arranged between the traction trolley and the pushing trolley. The rope transmission mechanism includes a driving rope group, a driven rope group and a reset rope group. A bidirectional lead screw slide is erected above the pushing trolley. A three-jaw chuck is arranged at the end of the bidirectional lead screw slide. The three-jaw chuck holds a mandrel. The pushing trolley is displaced by the power of the traction trolley. Then, the faster the movement speed of the traction trolley is, the faster the movement speed of the pushing trolley is, preventing the copper tube from breaking during stretching due to the slow pushing of the copper billet, and at the same time preventing the fast pushing of the copper billet, resulting in the stacking and deformation at the stretching part of the copper tube.

Description

Technical Field

[0001] The present invention relates to the field of machining, and particularly to a manufacturing device and method for an octagonal copper tube of a high casting speed metal mold casting device. Background Art

[0002] The manufacturing process of traditional copper tubes is as follows: 1. Melting and casting, melting finished copper plate materials into copper liquid with a high-temperature furnace; 2. Extruding the copper liquid through a tube-shaped mold and cooling it into a copper tube blank; 3. Rolling, putting the copper tube blank into a core head and pushing it into a four-roll planetary rolling mill for rolling to prepare a semi-finished copper tube; 4. Annealing the semi-finished copper tube in an annealing furnace; 5. Using a copper tube stretching machine to stretch the semi-finished copper tube; 6. Polishing the surface of the stretched copper tube. For the copper tube stretching stage, a Chinese patent with the publication number CN106925621B in China discloses a copper tube drawing device, but the device still has the following defects:

[0003] The device does not disclose whether the copper blank displaces during stretching and by what means. It is known that the copper blank is fixed by an expansion sleeve and a sealing cover. The stretching of the copper blank is that the stretching die extrudes and shapes the copper blank into a copper tube. During this process, the copper blank is continuously consumed and converted into a copper tube. And the consumption speed of the copper blank must be proportional to the stretching speed of the copper tube. Therefore, when the copper tube is stretched, the copper blank needs to be continuously pushed into the die at a certain speed. And in the traditional pushing of the copper blank, a pusher such as a cylinder is often used to continuously push the steel blank into the die. Since the traction device for stretching the copper tube and the cylinder are two separate devices and there is no connection between them, when the stretching speed of the traction device is too fast, the copper blank will cause the copper tube to break during stretching due to slow pushing. And when the stretching speed of the traction device is slow, the copper blank will cause the stretched part of the copper tube to stack and deform due to fast pushing. Therefore, it is necessary to provide a manufacturing device and method for an octagonal copper tube of a high casting speed metal mold casting device to solve the above problems. Summary of the Invention

[0004] Based on this, in view of the problems in the prior art, it is necessary to provide a manufacturing device and method for an octagonal copper tube of a high casting speed metal mold casting device.

[0005] In order to solve the problems of the prior art, the technical solution adopted by the present invention is as follows: a manufacturing device for octagonal copper tubes of high-speed metal mold casting equipment includes a rail platform, a drawing die for drawing a horizontal copper billet into an octagonal copper tube is provided in the rail platform, a traction trolley and a push trolley mounted on the rail platform are respectively provided on both sides of the drawing die, the push trolley is used to push the copper billet horizontally toward the drawing die, the traction trolley is used to drive one end of the octagonal copper tube to be horizontally stretched, a rope transmission mechanism is provided between the traction trolley and the push trolley, the rope transmission mechanism is used to reduce the power of the traction trolley when the traction trolley is displaced and transmit it to the push trolley, The pushing trolley is slowly displaced toward the stretching die and the copper billet is continuously pushed into the stretching die. The rope transmission mechanism includes an active rope group connected to the traction trolley and a driven rope group and a reset rope group connected to both sides of the pushing trolley. The active rope group is adjacent to the driven rope group and is transmission-connected. A bidirectional screw slide is mounted above the pushing trolley. A three-jaw chuck is fixed on the terminal end of the bidirectional screw slide. The three-jaw chuck clamps a core rod coaxially inserted into the copper billet. The core rod is used to cooperate with the stretching die to reduce the diameter and wall of the copper billet. The three-jaw chuck is used to drive the core rod to rotate and smooth the burrs generated on the inner wall of the copper billet when the copper billet is stretched.

[0006] Furthermore, the active rope group includes a No. 1 roller, a No. 1 pull rope and a No. 1 clockwork mechanism. A No. 1 support located between the pushing trolley and the stretching mold is fixedly provided in the track platform. Two No. 1 axle seats spaced apart along the width direction of the track platform are fixed on the No. 1 support. The No. 1 roller is horizontal and its two ends are respectively arranged in the two No. 1 axle seats. The No. 1 pull rope is wrapped around the No. 1 roller. One end of the No. 1 pull rope is fixedly connected to the No. 1 roller, and the other end is horizontally fixedly connected to the bottom of the traction trolley. The No. 1 clockwork mechanism is arranged on the side of the No. 1 roller. The No. 1 clockwork mechanism is used to generate elastic force after the No. 1 roller is driven to rotate by the No. 1 pull rope and drive the No. 1 roller to rotate in the opposite direction through the elastic force to reset it.

[0007] Furthermore, the driven rope group includes a No. 2 roller and a No. 2 pull rope. A No. 2 support located next to the No. 1 support is fixed in the track platform. Two No. 2 axle seats spaced apart along the width direction of the track platform are fixed on the No. 2 support. The No. 2 roller is horizontal and its two ends are respectively arranged in the two No. 2 axle seats. The No. 2 pull rope is wound on the No. 2 roller. One end of the No. 2 pull rope is fixedly connected to the No. 2 roller, and the other end is horizontally fixedly connected to the bottom of the push trolley. The winding directions of the No. 1 pull rope and the No. 2 pull rope are opposite, and the No. 1 roller and the No. 2 roller are connected through a reduction transmission mechanism.

[0008] Furthermore, the reduction transmission mechanism includes a No. 1 synchronous wheel, a No. 2 synchronous wheel and a synchronous belt. The No. 1 synchronous wheel is coaxially connected to the No. 1 roller, and the No. 2 synchronous wheel is coaxially connected to the No. 2 roller. The synchronous belt connects the No. 1 synchronous wheel and the No. 2 synchronous wheel. The outer diameter of the No. 1 synchronous wheel is smaller than the outer diameter of the No. 2 synchronous wheel.

[0009] Further, the reset rope set includes a third roller, a third pulling rope, and a second spring mechanism. A third support is fixedly provided inside the track platform. The third support and the first support are respectively located on both sides of the pushing trolley. Two third shaft seats spaced apart in the width direction of the track platform are fixedly provided on the third support. The third roller is horizontal and its two ends are respectively arranged inside the two third shaft seats. The third pulling rope is wound around the third roller. One end of the third pulling rope is fixedly connected to the third roller, and the other end is horizontally fixedly connected to the bottom of the pushing trolley. The second spring mechanism is arranged beside the third roller. The second spring mechanism is used to generate elastic force after the third roller is driven to rotate by the third pulling rope and drive the third roller to rotate in the reverse direction through the elastic force for reset. Among them, the winding directions of the first pulling rope and the third pulling rope are the same.

[0010] Further, the structures of the first spring mechanism and the second spring mechanism are the same. Both include a circular outer shell, a coiled spring, and a circular cover plate. One end of the circular outer shell is an open structure. The coiled spring is arranged inside the circular outer shell. The circular cover plate covers the opening of the circular outer shell. The outer edge end of the coiled spring is fixedly connected to the inner wall of the circular outer shell. Among them, the two circular outer shells are fixedly arranged inside the track platform coaxially with the first roller and the third roller respectively, and the openings of the two circular outer shells face the first roller and the third roller respectively. A jack is opened at the center of each circular cover plate. One ends of the first roller and the third roller on the same side respectively pass through the two jacks horizontally and are fixedly connected to the central ends of the two coiled springs.

[0011] Further, the stretching die includes an outer die and a die core. The outer die includes a circular die base and a circular pressing die. The circular die base is fixedly arranged inside the track platform through a vertical support. A columnar embedding groove is coaxially opened inside the circular die base. The circular pressing die is fixedly arranged on the side of the circular die base facing the pushing trolley, and the circular pressing die and the circular die base are mutually attached. A conical through groove is coaxially opened inside the circular pressing die. The caliber of the end of the conical through groove facing the columnar embedding groove gradually shrinks. The die core is fixedly arranged inside the columnar embedding groove. An octagonal through groove is axially opened inside the die core along the columnar embedding groove. The end of the octagonal through groove facing the circular pressing die is opposite to the small caliber end of the conical through groove.

[0012] Further, a buffer mechanism is fixedly provided at one end of the towing trolley facing the vertical support. The buffer mechanism includes a sponge pad, a displacement plate, a fixed plate, and several springs. The fixed plate is vertically fixedly provided at one end of the towing trolley facing the vertical support. Eaves plates horizontally extending towards the vertical support are formed at both the upper and lower ends of the fixed plate. The displacement plate is arranged on the side of the fixed plate facing the vertical support in parallel with the fixed plate. The upper and lower ends of the displacement plate are respectively slidably connected to the two eaves plates through several horizontal slide rails. The several springs are evenly distributed between the displacement plate and the fixed plate. Each spring is horizontal and both ends of each spring are respectively fixedly connected to the displacement plate and the fixed plate. The sponge pad is fixedly arranged on the side of the displacement plate facing the vertical support in parallel with the displacement plate.

[0013] Furthermore, a No. 1 clamping claw is fixedly provided on the traction trolley, and a No. 2 clamping claw is fixedly provided on the pushing trolley.

[0014] A method for manufacturing an octagonal copper tube of a high-speed metal mold casting device, the method comprising the following steps:

[0015] S1: First, the copper billet is clamped horizontally by the second clamping jaw and is aligned with the large-diameter end of the conical slot. Then, the mandrel is clamped horizontally by the three-jaw chuck. After that, the mandrel is driven horizontally by the bidirectional screw slide to insert the mandrel into the octagonal slot. During this process, the mandrel passes through the copper billet coaxially.

[0016] S2, start the traction trolley and move it away from the water level of the stretching die. The push trolley moves slowly toward the stretching die through the rope transmission mechanism. At this time, the No. 2 clamp drives the copper billet to squeeze into the circular pressing die. One end of the copper billet passes through the conical slot and the octagonal slot in turn, and is finally pressed into an octagonal copper tube and extends horizontally. At this time, stop the traction trolley, release the No. 2 clamp, and the push trolley and the traction trolley are reset synchronously;

[0017] S3, start the traction trolley again, and clamp the protruding end of the octagonal copper tube through the No. 1 clamp. During this process, the push trolley slowly moves toward the stretching die through the rope transmission mechanism, and starts the No. 2 clamp again to clamp the copper billet, and drives the copper billet to move slowly.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] First, the traction trolley for drawing the copper tube of the device is connected to the pushing trolley for pushing the copper billet through a rope transmission mechanism. The pushing trolley is displaced by the power of the traction trolley. The faster the movement speed of the traction trolley, the faster the movement speed of the pushing trolley is, so as to prevent the copper tube from breaking during stretching due to the slow pushing of the copper billet, and also prevent the copper billet from being pushed too fast, causing the copper tube to be stacked and deformed at the stretched part.

[0020] Secondly, a buffer mechanism is provided on the traction trolley of the device, which prevents the traction trolley from damaging the vertical bracket fixing the stretching die due to its own inertia after losing the driving force provided by the traction machine;

[0021] Third, the active rope group and reset rope group of the device are automatically reset by the No. 1 spring mechanism and the No. 2 spring mechanism respectively, without the need for external power to reset, thereby improving the winding efficiency of the No. 1 traction rope and the No. 3 traction rope. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the embodiment;

[0023] Figure 2 Schematic perspective view of the rope drive mechanism of the embodiment;

[0024] Figure 3 Schematic perspective view of the active rope group of the embodiment;

[0025] Figure 4 Schematic perspective view of the driven rope group of the embodiment;

[0026] Figure 5 Schematic perspective view of the reset rope group of the embodiment;

[0027] Figure 6 Exploded perspective view of the first hairspring mechanism of the embodiment;

[0028] Figure 7 Top view of the stretching die of the embodiment;

[0029] Figure 8 is Figure 7 Cross-sectional view along line A-A;

[0030] Figure 9 Exploded perspective view of the stretching die of the embodiment;

[0031] Figure 10 Top view of the pushing trolley of the embodiment;

[0032] Figure 11 is Figure 10 Cross-sectional view along line B-B.

[0033] The reference numerals in the figure are: 1, track table; 2, towing trolley; 3, pushing trolley; 4, active rope group; 5, driven rope group; 6, reset rope group; 7, bidirectional screw slide; 8, three-jaw chuck; 9, mandrel; 10, first roller; 11, first pull rope; 12, first hairspring mechanism; 13, first support; 14, first shaft seat; 15, second roller; 16, second pull rope; 17, second support; 18, second shaft seat; 19, first synchronous pulley; 20, second synchronous pulley; 21, synchronous belt; 22, third roller; 23, third pull rope; 24, second hairspring mechanism; 25, third support; 26, third shaft seat; 27, circular outer shell; 28, coiled hairspring; 29, circular cover plate; 30, jack; 31, die core; 32, circular die base; 33, circular pressing die; 34, vertical bracket; 35, columnar slot; 36, conical through slot; 37, octagonal through slot; 38, sponge pad; 39, displacement plate; 40, fixing plate; 41, spring; 42, eaves plate; 43, slide rail; 44, first jaw; 45, second jaw. Detailed implementation manners

[0034] To further understand the features, technical means, specific purposes, and functions achieved by the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] Reference Figures 1 to 11 Shown is a manufacturing device for an octagonal copper tube of a high casting speed permanent mold casting device, including a track table 1. Inside the track table 1, there is a stretching die for stretching a horizontally placed copper blank into an octagonal copper tube. On both sides of the stretching die, there are respectively a traction trolley 2 and a pushing trolley 3 mounted on the track table 1. The pushing trolley 3 is used to horizontally push the copper blank towards the stretching die, and the traction trolley 2 is used to drive one end of the octagonal copper tube for horizontal stretching. There is a rope transmission mechanism between the traction trolley 2 and the pushing trolley 3. The rope transmission mechanism is used to reduce the power of the traction trolley 2 when the traction trolley 2 moves and transmit it to the pushing trolley 3, so that the pushing trolley 3 slowly moves towards the stretching die and continuously pushes the copper blank into the stretching die. The rope transmission mechanism includes a driving rope group 4 connected to the traction trolley 2, a driven rope group 5 and a reset rope group 6 connected to both sides of the pushing trolley 3. The driving rope group 4 is adjacent to the driven rope group 5 and is in transmission connection. Above the pushing trolley 3, there is a bidirectional lead screw slide 7. At the end of the bidirectional lead screw slide 7, there is a three-jaw chuck 8 fixed. The three-jaw chuck 8 holds a mandrel 9 coaxially inserted into the copper blank. The mandrel 9 is used to cooperate with the stretching die to reduce the diameter and wall thickness of the copper blank. The three-jaw chuck 8 is used to drive the mandrel 9 to rotate and smooth the burrs generated on the inner wall of the copper blank during stretching.

[0036] The driving rope group 4 includes a first drum 10, a first pull rope 11, and a first spring mechanism 12. Inside the track table 1, there is a first support 13 fixed between the pushing trolley 3 and the stretching die. On the first support 13, there are two first shaft seats 14 spaced apart along the width direction of the track table 1. The first drum 10 is horizontal and its two ends are respectively arranged in the two first shaft seats 14. The first pull rope 11 is wound around the first drum 10. One end of the first pull rope 11 is fixedly connected to the first drum 10, and the other end is horizontally fixedly connected to the bottom of the traction trolley 2. The first spring mechanism 12 is arranged beside the first drum 10. The first spring mechanism 12 is used to generate elastic force after the first drum 10 is driven to rotate by the first pull rope 11 and drive the first drum 10 to rotate in the reverse direction for resetting through the elastic force.

[0037] The stretching principle of the copper tube is to use the stretching die to extrude and shape the copper blank into a copper tube. During this process, the copper blank is continuously consumed and converted into a copper tube, and the consumption speed of the copper blank must be proportional to the stretching speed of the copper tube;

[0038] The traction trolley 2 is driven by a traction machine (not shown in the figure), and the pushing trolley 3 is driven by the rope transmission mechanism when the traction trolley 2 moves;

[0039] When the traction trolley 2 moves away from the stretching die, one end of the No. 1 pull rope 11 will be stretched, and the No. 1 pull rope 11 wound on the No. 1 drum 10 will drive the No. 1 drum 10 to rotate. At this time, the No. 1 drum 10 is in the unwinding state. When the No. 1 drum 10 rotates, the torque is transmitted to the driven rope group 5 and the No. 1 spring mechanism 12 respectively, so that the driven rope group 5 pulls the trolley 3 to move. At the same time, the No. 1 spring mechanism 12 generates elastic force. When the traction trolley 2 loses the traction force of the traction machine, the No. 1 spring mechanism 12 drives the No. 1 drum 10 to reverse through the elastic force to reset and rewind the No. 1 pull rope 11.

[0040] Since the pushing trolley 3 is displaced with the help of the power of the traction trolley 2, the faster the movement speed of the traction trolley 2, the faster the movement speed of the pushing trolley 3, so that the pushing speed of the copper billet is proportional to the stretching speed of the octagonal copper tube. In this way, while the octagonal copper tube is pulled out, the copper billet will be consumed at a certain speed to prevent the copper tube from breaking during stretching due to the slow pushing of the copper billet, and also to prevent the copper billet from being pushed too fast, causing the copper tube to be stacked and deformed at the stretched part.

[0041] The driven rope group 5 includes a No. 2 roller 15 and a No. 2 pull rope 16. A No. 2 support 17 located next to the No. 1 support 13 is fixed in the track platform 1. Two No. 2 axle seats 18 spaced apart along the width direction of the track platform 1 are fixed on the No. 2 support 17. The No. 2 roller 15 is horizontal and its two ends are respectively arranged in the two No. 2 axle seats 18. The No. 2 pull rope 16 is wound on the No. 2 roller 15. One end of the No. 2 pull rope 16 is fixedly connected to the No. 2 roller 15, and the other end is horizontally fixedly connected to the bottom of the push trolley 3. Among them, the winding directions of the No. 1 pull rope 11 and the No. 2 pull rope 16 are opposite, and the No. 1 roller 10 and the No. 2 roller 15 are connected through a reduction transmission mechanism.

[0042] Since the No. 1 roller 10 and the No. 2 roller 15 are connected through the reduction transmission mechanism, when the No. 1 roller 10 is pulled by the No. 1 pull rope 11 to rotate, the No. 2 roller 15 will also rotate, and the speed of the No. 2 roller 15 is lower than the speed of the No. 1 roller 10. When the No. 2 roller 15 rotates, the No. 2 roller 15 will gradually reel in the No. 2 pull rope 16, so that the end of the No. 2 pull rope 16 connected to the pushing trolley 3 will drag the pushing trolley 3 toward the stretching die and move slowly. The copper billet is pushed horizontally toward the stretching die through the slow displacement of the pushing trolley 3. Since the other side of the pushing trolley 3 is connected to the reset rope group 6, the power of the pushing trolley 3 comes from the traction trolley 2. When the traction trolley 2 loses the power provided by the traction machine, the reset rope group 6 will pull the pushing trolley 3 to move in the opposite direction, thereby realizing the reset of the pushing trolley 3.

[0043] The speed reduction transmission mechanism includes a first synchronous pulley 19, a second synchronous pulley 20 and a synchronous belt 21. The first synchronous pulley 19 is coaxially connected to the first roller 10, the second synchronous pulley 20 is coaxially connected to the second roller 15, the synchronous belt 21 drives and connects the first synchronous pulley 19 and the second synchronous pulley 20, and the outer diameter of the first synchronous pulley 19 is smaller than that of the second synchronous pulley 20.

[0044] After the first roller 10 rotates, the first roller 10 will drive the second synchronous pulley 20 to rotate in the same direction. Through the driving action of the synchronous belt 21, the first synchronous pulley 19 is driven to rotate. Finally, the first roller 10 coaxially connected to the first synchronous pulley 19 will rotate. At the same time, since the outer diameter of the first synchronous pulley 19 is smaller than that of the second synchronous pulley 20, the rotation speed of the second roller 15 will be less than that of the first roller 10. Thus, the speed of the second roller 15 winding the second draw rope 16 will be less than the speed of the first roller 10 unwinding the first draw rope 11. Furthermore, the displacement speed of the pushing trolley 3 connected to the second draw rope 16 will be less than the displacement speed of the towing trolley 2 connected to the first draw rope 11, thereby realizing the slow-speed displacement of the pushing trolley 3 to horizontally push the copper billet towards the stretching die.

[0045] The reset rope set 6 includes a third roller 22, a third draw rope 23 and a second hairspring mechanism 24. A third support 25 is fixedly arranged inside the track table 1. The third support 25 and the first support 13 are respectively located on both sides of the pushing trolley 3. Two third shaft seats 26 spaced apart in the width direction of the track table 1 are fixedly arranged on the third support 25. The third roller 22 is horizontal and its two ends are respectively arranged inside the two third shaft seats 26. The third draw rope 23 is wound around the third roller 22. One end of the third draw rope 23 is fixedly connected to the third roller 22, and the other end is horizontally fixedly connected to the bottom of the pushing trolley 3. The second hairspring mechanism 24 is arranged beside the third roller 22. The second hairspring mechanism 24 is used to generate an elastic force after the third roller 22 is driven to rotate by the third draw rope 23 and drive the third roller 22 to rotate in the reverse direction for reset. Among them, the winding directions of the first draw rope 11 and the third draw rope 23 are the same.

[0046] When the trolley 3 moves towards the stretching die, the trolley 3 will drag the third pull rope 23 and drive the third roller 22 to rotate through the third pull rope 23. At this time, the third roller 22 is in the unwinding state. When the third roller 22 rotates, it will transmit torque to the second spring mechanism 24, and the second spring mechanism 24 will generate elastic force accordingly. When the traction trolley 2 loses the power provided by the tractor, the second spring mechanism 24 drives the third roller 22 to rotate in the reverse direction through the elastic force, so that the third roller 22 winds up the third pull rope 23. Finally, the third pull rope 23 will pull the trolley 3 to reset. While the second spring mechanism 24 drives the third roller 22 to rotate in the reverse direction, the first spring mechanism 12 drives the first roller 10 to rotate in the reverse direction. In this way, the third roller 22 and the first roller 10 wind up the third pull rope 23 and the first pull rope 11 respectively, and finally realize the synchronous reset of the trolley 3 and the traction trolley 2. And when the first spring mechanism 12 drives the first roller 10 to rotate in the reverse direction, the second roller 15 rotates in the reverse direction through the speed reduction transmission mechanism to unwind the second pull rope 16, and finally unwind the second pull rope 16 to the initial state.

[0047] The first spring mechanism 12 and the second spring mechanism 24 have the same structure, both including a circular outer shell 27, a coiled spring 28 and a circular cover plate 29. One end of the circular outer shell 27 is an open structure. The coiled spring 28 is arranged inside the circular outer shell 27. The circular cover plate 29 covers the opening of the circular outer shell 27. The outer edge end of the coiled spring 28 is fixedly connected to the inner wall of the circular outer shell 27. Among them, the two circular outer shells 27 are fixedly arranged coaxially with the first roller 10 and the third roller 22 inside the track table 1 respectively, and the openings of the two circular outer shells 27 face the first roller 10 and the third roller 22 respectively. A jack 30 is opened at the center of each circular cover plate 29. One end of the first roller 10 and the third roller 22 on the same side horizontally passes through the two jacks 30 respectively and is fixedly connected to the center ends of the two coiled springs 28.

[0048] When the first roller 10 is driven to rotate by the first pull rope 11, the end of the first roller 10 inserted into the corresponding jack 30 will drive the center end of the coiled spring 28 to continuously wind inwards. At this time, the whole coiled spring 28 is in a continuously compressed state. Once the first roller 10 loses the driving force of the first pull rope 11, the coiled spring 28 will release the elastic force to drive the first roller 10 to rotate in the reverse direction to wind up the first pull rope 11. And the first pull rope 11 being wound up will drag the traction trolley 2 to move towards the stretching die, so as to realize the reset of the traction trolley 2 after movement. Since the first spring mechanism 12 and the second spring have the same structure, the reset process of the third roller 22 is the same as that of the first roller 10. Finally, the third roller 22 will drive the third pull rope 23 to wind up through the elastic force released by the corresponding coiled spring 28, and the third pull rope 23 being wound up will drag the trolley 3 to reset.

[0049] The stretching die includes an outer die and a die core 31. The outer die includes a circular die base 32 and a circular pressing die 33. The circular die base 32 is fixedly arranged in the track table 1 through a vertical bracket 34. A columnar embedding groove 35 is coaxially opened in the circular die base 32. The circular pressing die 33 is fixedly arranged on one side of the circular die base 32 facing the pushing trolley 3, and the circular pressing die 33 and the circular die base 32 are mutually attached. A conical through groove 36 is coaxially opened in the circular pressing die 33. The caliber of one end of the conical through groove 36 facing the columnar embedding groove 35 gradually shrinks. The die core 31 is fixedly arranged in the columnar embedding groove 35. An octagonal through groove 37 is axially opened in the die core 31 along the columnar embedding groove 35. One end of the octagonal through groove 37 facing the circular pressing die 33 is directly opposite to the small-caliber end of the conical through groove 36.

[0050] Before the copper billet is horizontally pushed towards the stretching die, first make the three chucks clamp the mandrel 9 and horizontally insert it into the octagonal through groove 37. In this process, the mandrel 9 sequentially passes through the copper billet and the conical through groove 36 horizontally. When the copper billet is horizontally pushed towards the stretching die, one end of the copper billet will first extend into the large-caliber end of the conical through groove 36, and as the copper billet is continuously pushed in, the copper billet will gradually be extruded into a round tube with a gradually shrinking outer diameter by the conical through groove 36 and the mandrel 9. The cylindrical through groove is used to perform a round of plastic extrusion on the outer wall of the copper billet. After that, the end of the copper billet extruded into a round tube will continue to move towards the octagonal through groove 37. In this process, the outer wall of the round tube will be subjected to a second round of plastic extrusion by the octagonal through groove 37. Finally, the round tube is shaped into an octagonal copper tube. During the process of the copper billet being sequentially extruded into a round tube and an octagonal copper tube, the mandrel 9 will be driven to rotate by the three chucks to polish the burrs generated on the inner wall during the plastic shaping of the copper billet. Finally, the wall thickness of the octagonal copper tube obtained is the distance between the outer wall of the mandrel 9 and the inner wall of the octagonal through groove 37.

[0051] One end of the traction trolley 2 facing the vertical bracket 34 is fixedly provided with a buffer mechanism. The buffer mechanism includes a sponge pad 38, a displacement plate 39, a fixing plate 40 and a plurality of springs 41. The fixing plate 40 is vertically fixed at one end of the traction trolley 2 facing the vertical bracket 34. An eaves plate 42 extending horizontally towards the vertical bracket 34 is formed at both the upper and lower ends of the fixing plate 40. The displacement plate 39 is arranged parallel to the fixing plate 40 on the side of the fixing plate 40 facing the vertical bracket 34. The upper and lower ends of the displacement plate 39 are respectively slidably connected to the two eaves plates 42 through a plurality of horizontal slide rails 43. A plurality of springs 41 are evenly distributed between the displacement plate 39 and the fixing plate 40. Each spring 41 is horizontal and both ends of each spring 41 are fixedly connected to the displacement plate 39 and the fixing plate 40 respectively. The sponge pad 38 is fixedly arranged parallel to the displacement plate 39 on the side of the displacement plate 39 facing the vertical bracket 34.

[0052] When the traction trolley 2 is reset, the traction trolley 2 will horizontally displace towards the drawstring die. During this process, the traction trolley 2 will hit the vertical bracket 34 due to inertia. When the traction trolley 2 is about to contact the vertical bracket 34, the sponge pad 38 will first contact the vertical bracket 34, and the sponge pad 38 is used to prevent the hard contact between the traction trolley 2 and the vertical bracket 34. Thereafter, the sponge pad 38 will drive the displacement plate 39 to compress a number of springs 41 under the reaction force, so as to buffer the reaction force received by the sponge pad 38 through the elasticity of each spring 41. Finally, through elastic buffering, the vertical bracket 34 is prevented from being damaged by the traction trolley 2.

[0053] A first gripper 44 is fixedly provided on the traction trolley 2, and a second gripper 45 is fixedly provided on the pushing trolley 3.

[0054] The first gripper 44 is used to clamp the end of the copper billet after being extruded into an octagonal copper tube, and the first gripper 44 stretches the octagonal copper tube through the displacement of the traction trolley 2. The second gripper 45 is used to clamp one end of the copper billet, and the second gripper 45 horizontally pushes the copper billet towards the drawing die through the displacement of the pushing trolley 3.

[0055] A manufacturing method of an octagonal copper tube of a high drawing speed permanent mold casting device, the manufacturing method comprising the following steps:

[0056] S1, first horizontally clamp the copper billet by the second gripper 45 and make the copper billet face the large-diameter end of the conical through groove 36. Then horizontally clamp the mandrel 9 by the three-jaw chuck 8. Thereafter, drive the mandrel 9 to horizontally insert into the octagonal through groove 37 by the bidirectional lead screw slide 7. During this process, the mandrel 9 coaxially passes through the copper billet;

[0057] This process is the preparation stage. Once the copper billet is continuously pushed towards the conical through groove 36, the copper billet will be extruded into a round tube through the cooperation of the conical through groove 36 and the mandrel 9, and the formed round tube will be extruded into an octagonal copper tube by the subsequent octagonal through groove 37.

[0058] S2, start the traction trolley 2 to make the traction trolley 2 horizontally displace away from the drawing die. The pushing trolley 3 slowly displaces towards the drawing die through the rope transmission mechanism. At this time, the second gripper 45 drives the copper billet to squeeze into the circular die 33. One end of the copper billet passes through the conical through groove 36 and the octagonal through groove 37 in sequence, and finally is pressed into an octagonal copper tube and horizontally extends out. At this time, stop the traction trolley 2, release the second gripper 45, and the pushing trolley 3 and the traction trolley 2 are reset synchronously;

[0059] When the traction trolley 2 makes the first displacement, the first clamping does not start. At this time, the traction trolley 2 only plays the role of driving the displacement of the pushing trolley 3. The second jaw 45 will push one end of the copper billet into the conical through groove 36 and the octagonal through groove 37 in sequence through the pushing trolley 3, so that the formed octagonal copper tube extends out of the stretching die, facilitating the clamping of the first jaw 44 in the subsequent process. After this process ends, the traction trolley 2 loses the driving force provided by the tractor, and drives the first pulling rope 11 to drag the traction trolley 2 to reset through the first spring mechanism 12. At the same time when the traction trolley 2 loses power, the second jaw 45 loosens, and drives the third pulling rope 23 to drag the pushing trolley 3 to reset through the second spring mechanism 24. At this time, the second jaw 45 fits against the outer wall of the copper billet and moves in the reverse direction. Since one end of the copper billet is completely inside the stretching die and due to the supporting effect of the second jaw 45, the copper billet will not fall when the second jaw 45 loosens. After that, the traction trolley 2 is started again to stretch the octagonal copper tube.

[0060] S3. Start the traction trolley 2 again, and clamp the extended end of the octagonal copper tube through the first jaw 44. During this process, the pushing trolley 3 moves slowly towards the stretching die through the rope transmission mechanism, and start the second jaw 45 again to clamp the copper billet and drive the copper billet to move slowly.

[0061] This process is the stretching stage of the octagonal copper tube. When the traction trolley 2 moves, it will drive the pushing trolley 3 to move through the rope transmission mechanism. Then the second jaw 45 will clamp the copper billet and continuously push it into the conical through groove 36. At this time, the copper billet is continuously consumed and transformed into an octagonal copper tube. Since the power of the pushing trolley 3 comes from the traction trolley 2, the faster the movement speed of the traction trolley 2, the faster the movement speed of the pushing trolley 3. Thus, the pushing speed of the copper billet is proportional to the stretching speed of the octagonal copper tube. In this way, when the octagonal copper tube is pulled out, the copper billet will be consumed at a certain speed, preventing the copper tube from breaking during stretching due to the slow pushing of the copper billet, and at the same time preventing the copper billet from being pushed too fast, resulting in lamination and deformation at the stretching part of the copper tube. And lubricating oil needs to be applied to the copper billet before stretching the copper tube to further prevent the octagonal copper tube from being pulled off.

[0062] The above embodiments only represent one or several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but should not be construed as limiting the scope of the present invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent should be subject to the appended claims.

Claims

1. Manufacturing equipment for an octagonal copper tube of a high casting speed permanent mold casting device, characterized in that, It includes an orbital table (1). Inside the orbital table (1), there is a stretching die for stretching a horizontally placed copper billet into an octagonal copper tube. On both sides of the stretching die, there are respectively a traction trolley (2) and a pushing trolley (3) mounted on the orbital table (1). The pushing trolley (3) is used to horizontally push the copper billet towards the stretching die, and the traction trolley (2) is used to drive one end of the octagonal copper tube for horizontal stretching. There is a rope transmission mechanism between the traction trolley (2) and the pushing trolley (3). The rope transmission mechanism is used to reduce the power of the traction trolley (2) when the traction trolley (2) displaces and transmit it to the pushing trolley (3), so that the pushing trolley (3) slowly displaces towards the stretching die and continuously pushes the copper billet into the stretching die. The rope transmission mechanism includes a driving rope group (4) connected to the traction trolley (2), a driven rope group (5) and a reset rope group (6) connected to both sides of the pushing trolley (3). The driving rope group (4) is adjacent to the driven rope group (5) and is in transmission connection. Above the pushing trolley (3), there is a bidirectional lead screw slide (7). At the end of the bidirectional lead screw slide (7), there is a three-jaw chuck (8) fixed. The three-jaw chuck (8) holds a mandrel (9) coaxially inserted into the copper billet. The mandrel (9) is used to cooperate with the stretching die to reduce the diameter and wall thickness of the copper billet. The three-jaw chuck (8) is used to drive the mandrel (9) to rotate and smooth the burrs generated on the inner wall during the stretching of the copper billet. The stretching die includes an outer die and a die core (31). The outer die includes a circular die base (32) and a circular pressing die (33). The circular die base (32) is fixedly arranged inside the orbital table (1) through a vertical bracket (34). A columnar groove (35) is coaxially opened inside the circular die base (32). The circular pressing die (33) is fixedly arranged on the side of the circular die base (32) facing the pushing trolley (3), and the circular pressing die (33) and the circular die base (32) are mutually attached. A conical through groove (36) is coaxially opened inside the circular pressing die (33). The diameter of the end of the conical through groove (36) facing the columnar groove (35) gradually decreases. The die core (31) is fixedly arranged inside the columnar groove (35). An octagonal through groove (37) is axially opened inside the die core (31) along the columnar groove (35). The end of the octagonal through groove (37) facing the circular pressing die (33) is directly opposite to the small-diameter end of the conical through groove (36). A first jaw (44) is fixed on the traction trolley (2), and a second jaw (45) is fixed on the pushing trolley (3).

2. The manufacturing equipment of the octagonal copper tube of the high casting speed permanent mold casting equipment according to claim 1, characterized in that, The active rope group (4) includes a No. 1 roller (10), a No. 1 pull rope (11) and a No. 1 spring mechanism (12). A No. 1 support (13) located between the push trolley (3) and the stretching die is fixedly provided in the track platform (1). Two No. 1 axle seats (14) spaced apart along the width direction of the track platform (1) are fixedly provided on the No. 1 support (13). The No. 1 roller (10) is horizontal and its two ends are respectively arranged in the two No. 1 axle seats (14). The No. 1 pull rope (11) is wound around the No. 1 roller (10). One end of the No. 1 pull rope (11) is fixedly connected to the No. 1 roller (10), and the other end is fixedly connected to the bottom of the traction trolley (2) in a horizontal manner. The No. 1 spring mechanism (12) is arranged on the side of the No. 1 roller (10). The No. 1 spring mechanism (12) is used to generate elastic force after the No. 1 roller (10) is driven to rotate by the No. 1 pull rope (11) and drive the No. 1 roller (10) to rotate in the opposite direction through the elastic force to reset.

3. The manufacturing equipment for the octagonal copper tube of the high casting speed permanent mold casting equipment according to claim 2, characterized in that, The driven rope group (5) includes a No. 2 roller (15) and a No. 2 pull rope (16). A No. 2 support (17) located next to the No. 1 support (13) is fixedly provided in the track platform (1). Two No. 2 axle seats (18) spaced apart along the width direction of the track platform (1) are fixedly provided on the No. 2 support (17). The No. 2 roller (15) is horizontal and its two ends are respectively provided in the two No. 2 axle seats (18). The No. 2 pull rope (16) is wound on the No. 2 roller (15). One end of the No. 2 pull rope (16) is fixedly connected to the No. 2 roller (15), and the other end is fixedly connected to the bottom of the push trolley (3) in a horizontal direction. The winding directions of the No. 1 pull rope (11) and the No. 2 pull rope (16) are opposite. The No. 1 roller (10) and the No. 2 roller (15) are connected to each other through a reduction transmission mechanism.

4. The manufacturing equipment of the octagonal copper tube of the high casting speed permanent mold casting equipment according to claim 3, characterized in that, The reduction transmission mechanism comprises a first synchronous wheel (19), a second synchronous wheel (20) and a synchronous belt (21), wherein the first synchronous wheel (19) is coaxially connected to the first roller (10), the second synchronous wheel (20) is coaxially connected to the second roller (15), and the synchronous belt (21) drives the first synchronous wheel (19) and the second synchronous wheel (20) in connection with each other, and the outer diameter of the first synchronous wheel (19) is smaller than the outer diameter of the second synchronous wheel (20).

5. The manufacturing equipment of the octagonal copper tube of the high casting speed metal mold casting equipment according to claim 2, characterized in that, The reset rope set (6) includes a third roller (22), a third pulling rope (23) and a second hairspring mechanism (24). A third support (25) is fixedly arranged inside the track table (1). The third support (25) and the first support (13) are respectively located on both sides of the pushing trolley (3). Two third shaft seats (26) spaced apart along the width direction of the track table (1) are fixedly arranged on the third support (25). The third roller (22) is horizontal and its two ends are respectively arranged inside the two third shaft seats (26). The third pulling rope (23) is wound around the third roller (22). One end of the third pulling rope (23) is fixedly connected to the third roller (22), and the other end is horizontally fixedly connected to the bottom of the pushing trolley (3). The second hairspring mechanism (24) is arranged beside the third roller (22). The second hairspring mechanism (24) is used to generate elastic force after the third roller (22) is driven to rotate by the third pulling rope (23), and drive the third roller (22) to rotate reversely through the elastic force for reset. Among them, the winding direction of the first pulling rope (11) is the same as that of the third pulling rope (23).

6. The manufacturing equipment of the octagonal copper tube of the high casting speed metal mold casting equipment according to claim 5, characterized in that, The structure of the first hairspring mechanism (12) is the same as that of the second hairspring mechanism (24), and both include a circular outer shell (27), a coiled hairspring (28) and a circular cover plate (29). One end of the circular outer shell (27) is an open structure. The coiled hairspring (28) is arranged inside the circular outer shell (27). The circular cover plate (29) covers the opening of the circular outer shell (27). The outer edge end of the coiled hairspring (28) is fixedly connected to the inner wall of the circular outer shell (27). Among them, the two circular outer shells (27) are fixedly arranged inside the track table (1) coaxially with the first roller (10) and the third roller (22), and the openings of the two circular outer shells (27) face the first roller (10) and the third roller (22) respectively. A jack (30) is opened at the center of each circular cover plate (29). One ends of the first roller (10) and the third roller (22) on the same side respectively pass through the two jacks (30) horizontally and are fixedly connected to the central ends of the two coiled hairsprings (28).

7. The manufacturing equipment for the octagonal copper tube of the high casting speed metal mold casting equipment according to claim 1, characterized in that, One end of the towing trolley (2) facing the vertical bracket (34) is fixedly provided with a buffer mechanism. The buffer mechanism includes a sponge pad (38), a displacement plate (39), a fixing plate (40) and a plurality of springs (41). The fixing plate (40) is vertically and fixedly arranged at one end of the towing trolley (2) facing the vertical bracket (34). An eaves plate (42) horizontally extending towards the vertical bracket (34) is formed at both the upper and lower ends of the fixing plate (40). The displacement plate (39) is arranged on one side of the fixing plate (40) facing the vertical bracket (34) in parallel with the fixing plate (40). The upper and lower ends of the displacement plate (39) are respectively slidably connected to the two eaves plates (42) through a plurality of horizontal slide rails (43). A plurality of springs (41) are evenly distributed between the displacement plate (39) and the fixing plate (40). Each spring (41) is horizontal and the two ends of each spring (41) are respectively fixedly connected to the displacement plate (39) and the fixing plate (40). The sponge pad (38) is fixedly arranged on one side of the displacement plate (39) facing the vertical bracket (34) in parallel with the displacement plate (39).

8. A manufacturing method of an octagonal copper tube for a high casting speed permanent mold casting device, including the manufacturing device of the octagonal copper tube for the high casting speed permanent mold casting device according to any one of claims 1-7, characterized in that, This manufacturing method comprises the following steps: S1. First, the copper blank is horizontally clamped by the second jaw (45) and the copper blank is aligned with the large-diameter end of the conical through groove (36). Then, the mandrel (9) is horizontally clamped by the three-jaw chuck (8). Thereafter, the mandrel (9) is horizontally inserted into the octagonal through groove (37) by driving the mandrel (9) through the two-way screw slide table (7). During this process, the mandrel (9) coaxially passes through the copper blank; S2. Start the towing trolley (2) to move the towing trolley (2) away from the water level displacement of the stretching die. The pushing trolley (3) slowly displaces towards the stretching die through the rope transmission mechanism. At this time, the second jaw (45) drives the copper blank to be squeezed into the circular die (33). One end of the copper blank sequentially passes through the conical through groove (36) and the octagonal through groove (37), and finally an octagonal copper tube is pressed and horizontally extended. At this time, stop the towing trolley (2), release the second jaw (45), and the pushing trolley (3) and the towing trolley (2) are reset synchronously; S3. Start the towing trolley (2) again, and clamp the extended end of the octagonal copper tube by the first jaw (44). During this process, the pushing trolley (3) slowly displaces towards the stretching die through the rope transmission mechanism, and the second jaw (45) is started again to clamp the copper blank and drive the copper blank to be slowly pushed.

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