Opening and closing type copper rod material pre-bending mechanism

Abstract

The application provides an open-close type copper rod pre-bending mechanism. When a rough copper rod is cut off, the rough copper rod on a continuous casting and rolling production line is still continuously discharged, and the tail of the previous rough copper rod is still clamped by a first roller mechanism and a second roller mechanism. A driving device drives a first mounting base to swing around a first rotating base, the first mounting base and a second mounting base are opened in a direction away from a rod inlet, so that the previous rough copper rod falls into a rod collecting trolley, and the head of a subsequent rough copper rod to be coiled is smoothly fed into a bending deformation channel. When the head of the subsequent rough copper rod to be coiled is fed into the first guiding wheel and the second guiding wheel, the driving device drives the first mounting base to swing around the first rotating base, the first mounting base is close to the second mounting base, and the subsequent rough copper rod is clamped by the first guiding wheel and the second guiding wheel. The subsequent rough copper rod is continuously conveyed along the bending deformation channel, and is continuously bent and coiled under the cooperation of the outer side pressing wheel and the inner side pressing wheel.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of copper rod take-up, and particularly relates to an open-close type copper rod pre-bending mechanism. BACKGROUND

[0002] Copper rods are produced by adopting a continuous casting and rolling production line. Different take-up devices are used according to the different thicknesses of the copper rods.

[0003] The diameter of a thin copper rod is usually 8-10 mm, the strength is small, and the bendability is good. The thin copper rod is wound into a coil by swinging of a swing rod machine. When the coil reaches a proper number of turns, the thin copper rod is cut off, and the wound thin copper rod falls into a take-up trolley. A copper rod rolling take-up device and method are disclosed in a Chinese patent document with the application publication number CN116237392A. The line throwing pipe therein is a three-dimensional spiral pipe material around a vertical shaft. The copper rod enters the line throwing pipe, the line throwing pipe rotates to throw the copper wire to be wound and temporarily stored in the line storage device. A bracket is placed on the lifting platform. The lifting platform is controlled to rise until the bracket is at a distance of 100 mm from the lower edge of the core drum, that is, the lowest safe distance. The movable baffle of the line storage device is controlled to open, and the temporarily stored copper wire coil falls onto the bracket, and the line throwing pipe continues to throw the line.

[0004] The diameter of a thick copper rod is usually 12.5-50 mm, the strength is large, and the bendability is poor. A bending mechanism is needed to apply a radial force to the thick copper rod to wind the thick copper rod into a coil. Generally, the bending mechanism is installed on a machine frame. A bending mechanism for a copper rod take-up machine is disclosed in a Chinese patent document with the authorization publication number CN208131863U. The copper rod blank entering between the upper and lower wire running rollers is bent by a guide wheel device and a pressure wheel device, and is wound by a winding mechanism after being bent.

[0005] The thick copper rod needs to be cut off when it is wound to a proper number of turns, and the basket is replaced to facilitate the collection of the next coil of thick copper rod. After the thick copper rod is cut off, the thick copper rod on the continuous casting and rolling production line continues to be discharged. If the conveying channel formed by the guide wheels is fixed, in order to ensure that the thick copper rod can be deformed according to the diameter set by the pre-deformation mechanism, a certain pressure needs to be applied to the thick copper rod. Therefore, the diameter of the conveying channel formed by the guide wheels is slightly smaller than the diameter of the thick copper rod to be conveyed. This further causes the head of the thick copper rod to be wound to be difficult to enter the pre-bending mechanism after being cut off, and the tail of the previous coil of thick copper rod to lose the traction force and be difficult to output from the pre-bending mechanism, resulting in being stuck in the pre-bending mechanism and failing to fall into the rod take-up trolley. SUMMARY

[0006] The technical problem solved by the present application is to provide an open-close type copper rod pre-bending mechanism, which is beneficial to the entry of the head of the subsequent rough copper rod to be coiled into a bending deformation channel and the falling of the previous rough copper rod coil into a rod collecting trolley after the rough copper rod is cut off, thereby ensuring the collection of the rough copper rod in the continuous production process.

[0007] The technical solution adopted by the present application to solve the technical problem is an open-close type copper rod pre-bending mechanism, which comprises a rack, a first mounting seat, a second mounting seat, a first roller mechanism and a second roller mechanism.

[0008] The first mounting seat is rotationally connected to the rack through a first rotating seat, and a driving device for driving the first mounting seat to swing is installed on the rack; the first roller mechanism comprises a first guide wheel and an outer side pressure roller, and the first guide wheel and the outer side pressure roller are both installed on the first mounting seat.

[0009] The second mounting seat is fixedly installed on the rack and located on the same side of the first mounting seat; the second roller mechanism comprises a second guide wheel and an inner side pressure roller, and the second guide wheel and the inner side pressure roller are both installed on the second mounting seat.

[0010] The first guide wheel and the second guide wheel are arranged in pairs and form a pinch roller set used in cooperation.

[0011] An entry port is formed on the rack, a bending deformation channel is formed between the first roller mechanism and the second roller mechanism, and the entry end of the bending deformation channel is arranged corresponding to the entry port; the outer side pressure roller is located on the outer bending side of the bending deformation channel, the inner side pressure roller is located on the inner bending side of the bending deformation channel, and the outer side pressure roller and the inner side pressure roller are staggered arranged along the direction from the entry end to the exit end of the bending deformation channel.

[0012] Further, a pre-positioning structure is further included, which comprises a mounting plate, a bolt and a positioning plate.

[0013] The mounting plate is connected to the second mounting seat and located below the second mounting seat; the positioning plate is connected to the first mounting seat and located below the first mounting seat; and the mounting plate and the positioning plate are respectively located on both sides of the bending deformation channel and correspondingly arranged.

[0014] The bolt is installed on the mounting plate and abuts against the positioning plate.

[0015] Further, the driving device is located on the side opposite to the first mounting seat and the second mounting seat.

[0016] Further, the pinch roller set comprises a first pinch roller set arranged adjacent to the entry port.

[0017] The outer side pressing wheel comprises a first outer side pressing wheel, which is located on the side of the first guide wheel away from the feeding port;

[0018] The inner side pressing wheel is located on the side of the second guide wheel of the first pinch roller set away from the feeding port and cooperates with the first outer side pressing wheel.

[0019] Further, the pinch roller set further comprises a second pinch roller set, and the first pinch roller set and the second pinch roller set are arranged in sequence in the direction away from the feeding port;

[0020] The inner side pressing wheel is located between the second guide wheel of the first pinch roller set and the second guide wheel of the second pinch roller set;

[0021] The first outer side pressing wheel is located between the first guide wheel of the first pinch roller set and the first guide wheel of the second pinch roller set;

[0022] The outer side pressing wheel further comprises a second outer side pressing wheel, which is located on the side of the first guide wheel of the second pinch roller set away from the first outer side pressing wheel.

[0023] Further, a first roller seat is provided, the second outer side pressing wheel is rotatably installed on the first roller seat, the first roller seat is slidably installed on the first mounting seat and is locked with the first mounting seat through a first locking member; the first roller seat slides towards or away from the second mounting seat;

[0024] A second roller seat is further provided, the inner side pressing wheel is rotatably installed on the second roller seat, the second roller seat is slidably installed on the second mounting seat and is locked with the second mounting seat through a second locking member; the second roller seat slides towards or away from the first mounting seat.

[0025] Further, a horizontally arranged pressing roller is provided, which is rotatably connected with the first mounting seat through a roller seat; the pressing roller is located below the discharge end of the bending deformation channel.

[0026] Further, a horizontally arranged feeding cylinder is provided, which is installed at the feeding port.

[0027] Further, the first mounting seat and the second mounting seat are both horizontally arranged.

[0028] Further, the driving device is a pneumatic cylinder.

[0029] Compared with the prior art, the present application has the beneficial effects that the present application provides an open-close type copper rod pre-bending mechanism, which is beneficial to the entry of the head of the subsequent rough copper rod to be coiled into the bending deformation channel and the falling of the previous rough copper rod coil into the rod collecting trolley after the rough copper rod is cut off. The change basket operation does not affect the continuous production, and ensures the collection of the rough copper rod in the process of continuous production line. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a top view structural schematic diagram of the present application;

[0031] Figure 2 is a top view structural schematic diagram of the first mounting seat and the second mounting seat when they are opened;

[0032] Figure 3 is a top view structural schematic diagram of the first mounting seat and the second mounting seat when they are opened;

[0033] Figure 4 is a stress example diagram of the rough copper rod in the bending deformation channel when the pre-positioning structure is not added;

[0034] Figure 5 is a stress example diagram of the rough copper rod in the bending deformation channel after the pre-positioning structure is added;

[0035] Reference signs: 200 - rack; 201 - rod inlet; 202 - first mounting seat; 203 - first guide wheel; 204 - first outer side pressure wheel; 205 - second outer side pressure wheel; 206 - second mounting seat; 207 - second guide wheel; 208 - inner side pressure wheel; 209 - first roller seat; 210 - second roller seat; 211 - first rotating seat; 212 - driving device; 213 - second rotating seat; 214 - third rotating seat; 215 - pressing down roller; 216 - roller seat; 217 - feeding cylinder; 218 - first pinch roller group; 219 - second pinch roller group; 220 - mounting plate; 221 - bolt; 222 - positioning plate. DETAILED DESCRIPTION

[0036] The present application is further illustrated below in combination with the drawings and examples.

[0037] The opening and closing type copper rod pre-bending mechanism comprises a rack 200, a first mounting seat 202, a second mounting seat 206, a first roller mechanism and a second roller mechanism; the first mounting seat 202 is rotationally connected with the rack 200 through a first rotating seat 211, and a driving device 212 for driving the first mounting seat 202 to swing is installed on the rack 200; the first roller mechanism comprises a first guide wheel 203 and an outer side pressure wheel, and the first guide wheel 203 and the outer side pressure wheel are both installed on the first mounting seat 202; the second mounting seat 206 is fixedly installed on the rack 200 and is located on the same side of the first mounting seat 202; the second roller mechanism comprises a second guide wheel 207 and an inner side pressure wheel 208, and the second guide wheel 207 and the inner side pressure wheel 208 are both installed on the second mounting seat 206; the first guide wheel 203 and the second guide wheel 207 are arranged in pairs and form a pinch roller group used in cooperation; an inlet 201 is formed in the rack 200, a bending deformation channel is formed between the first roller mechanism and the second roller mechanism, and the inlet end of the bending deformation channel is arranged corresponding to the inlet 201; the outer side pressure wheel is located at the outer bending side of the bending deformation channel, the inner side pressure wheel 208 is located at the inner bending side of the bending deformation channel, and the outer side pressure wheel and the inner side pressure wheel 208 are staggered arranged along the direction from the inlet end to the outlet end of the bending deformation channel.

[0038] The rack 200 provides mounting support for the driving device 212, the first mounting seat 202 and the second mounting seat 206, the first mounting seat 202 provides rotating mounting support for the first guide wheel 203 and the outer side pressure wheel, and the second mounting seat 206 provides rotating mounting support for the second guide wheel 207 and the inner side pressure wheel 208. Preferably, the first mounting seat 202 and the second mounting seat 206 are horizontally arranged. The rough copper rod enters the bending deformation channel through the rod inlet 201, the pair of first guide wheels 203 and the second guide wheels 207 play a role in clamping the rough copper rod, the outer side pressure wheel acts on one side of the axial direction of the rough copper rod, and the inner side pressure wheel 208 acts on the other side of the axial direction of the rough copper rod, and the rough copper rod is bent and continuously coiled by the cooperation of the outer side pressure wheel and the inner side pressure wheel 208. When the rough copper rod is wound to a suitable number of turns, the rough copper rod needs to be cut off, and the basket is replaced to facilitate the collection of the next volume of rough copper rod. When the rough copper rod is cut off, the rough copper rod on the continuous casting and rolling production line is still continuously discharged, and the tail of the previous volume of rough copper rod is still clamped by the first roller mechanism and the second roller mechanism. The driving device 212 drives the first mounting seat 202 to swing around the first rotating seat 211, and the first mounting seat 202 and the second mounting seat 206 open in the direction away from the rod inlet 201, which facilitates the falling of the previous volume of rough copper rod into the rod collecting trolley and the smooth entry of the head of the subsequent rough copper rod to be wound into the bending deformation channel. When the head of the subsequent rough copper rod to be wound is sent between the first guide wheel 203 and the second guide wheel 207, the driving device 212 drives the first mounting seat 202 to swing around the first rotating seat 211, and the first mounting seat 202 approaches the second mounting seat 206, and the subsequent rough copper rod is clamped by the first guide wheel 203 and the second guide wheel 207. The subsequent rough copper rod to be wound continues to be conveyed along the bending deformation channel and is bent and continuously coiled under the cooperation of the outer side pressure wheel and the inner side pressure wheel 208.

[0039] The driving device 212 can be a hydraulic cylinder, a gas cylinder, etc., and preferably a gas cylinder, which is driven by the extension or shortening of the piston rod of the gas cylinder. When the driving device 212 is a gas cylinder, one end of the gas cylinder is connected to the rack 200 through the second rotating seat 213, and the other end of the gas cylinder is connected to the first mounting seat 202 through the third rotating seat 214. The first rotating seat 211, the second rotating seat 213 and the third rotating seat 214 are all hinges.

[0040] The driving device 212 drives the first mounting seat 202 to swing, thereby adjusting the width of the bending deformation channel, which has low control precision and is easy to cause the width of the bending deformation channel to be smaller than the diameter of the rough copper rod. Figure 4As shown, the driving device 212 drives the first mounting base 202 to swing towards the direction F of the second mounting base 206, and the contact surface of the rough copper rod in the bending deformation channel with the first guide wheel 203 and the second guide wheel 207 is the main stress point. The rough copper rod in the bending deformation channel is prone to deformation along its own radial direction, which further affects the quality of the rod material. Preferably, the pre-positioning structure is further included, which comprises a mounting plate 220, a bolt 221 and a positioning plate 222. The mounting plate 220 is connected with the second mounting base 206 and located below the second mounting base 206. The positioning plate 222 is connected with the first mounting base 202 and located below the first mounting base 202. The mounting plate 220 and the positioning plate 222 are respectively located on both sides of the bending deformation channel and correspondingly arranged. The bolt 221 is installed on the mounting plate 220 and abuts with the positioning plate 222. The mounting plate 220 and the second mounting base 206 are welded together, and the positioning plate 222 and the first mounting base 202 are welded together. Threaded holes corresponding to the bolt 221 can be formed on the mounting plate 220, and nuts corresponding to the bolt 221 can also be welded and fixed on the mounting plate 220. By adjusting the relative position of the bolt 221 and the mounting plate 220, the distance between the mounting plate 220 and the positioning plate 222 is adjusted, and the width of the bending deformation channel is pre-limited to adapt to the winding of rough copper rods with different diameters. Figure 5 As shown, the driving device 212 drives the first mounting base 202 to swing towards the direction F of the second mounting base 206, and the contact surface of the rough copper rod in the bending deformation channel with the first guide wheel 203 and the second guide wheel 207 is the main stress point. The rough copper rod in the bending deformation channel is prone to deformation along its own radial direction, which further affects the quality of the rod material. Preferably, the pre-positioning structure is further included, which comprises a mounting plate 220, a bolt 221 and a positioning plate 222. The mounting plate 220 is connected with the second mounting base 206 and located below the second mounting base 206. The positioning plate 222 is connected with the first mounting base 202 and located below the first mounting base 202. The mounting plate 220 and the positioning plate 222 are respectively located on both sides of the bending deformation channel and correspondingly arranged. The bolt 221 is installed on the mounting plate 220 and abuts with the positioning plate 222. The mounting plate 220 and the second mounting base 206 are welded together, and the positioning plate 222 and the first mounting base 202 are welded together. Threaded holes corresponding to the bolt 221 can be formed on the mounting plate 220, and nuts corresponding to the bolt 221 can also be welded and fixed on the mounting plate 220. By adjusting the relative position of the bolt 221 and the mounting plate 220, the distance between the mounting plate 220 and the positioning plate 222 is adjusted, and the width of the bending deformation channel is pre-limited to adapt to the winding of rough copper rods with different diameters.

[0041] Preferably, the driving device 212 is located on the side opposite to the first mounting base 202 and the second mounting base 206. The output of the rough copper rod is avoided from being interfered.

[0042] The arrangement of the pinch roller set, the outer side pressure roller and the inner side pressure roller 208 has various embodiments:

[0043] Embodiment one, the pinch roller set comprises a first pinch roller set 218 arranged adjacent to the rod inlet 201. The outer side pressure roller comprises a first outer side pressure roller 204 located on the side of the first guide wheel 203 away from the rod inlet 201. The inner side pressure roller 208 is located on the side of the second guide wheel 207 of the first pinch roller set 218 away from the rod inlet 201 and cooperates with the first outer side pressure roller 204. The first pinch roller set 218 clamps and conveys the rough copper rod, and the rough copper rod is bent by the cooperation of the first outer side pressure roller 204 and the inner side pressure roller 208.

[0044] In the second embodiment, the pinch roll set further comprises a second pinch roll set 219, the first pinch roll set 218 and the second pinch roll set 219 are arranged in sequence in a direction away from the entry port 201; the inner side press roll 208 is located between the second guide roll 207 of the first pinch roll set 218 and the second guide roll 207 of the second pinch roll set 219; the first outer side press roll 204 is located between the first guide roll 203 of the first pinch roll set 218 and the first guide roll 203 of the second pinch roll set 219; the outer side press roll further comprises a second outer side press roll 205, the second outer side press roll 205 is located on a side of the first guide roll 203 of the second pinch roll set 219 away from the first outer side press roll 204. The second pinch roll set 219 further clamps and conveys the rough copper rod, the second outer side press roll 205 further bends and continuously coils the rough copper rod.

[0045] The axial directions of the first guide roll 203, the first outer side press roll 204, the second outer side press roll 205, the second guide roll 207 and the inner side press roll 208 are parallel to each other. The outer circumferential surfaces of the first guide roll 203 and the second guide roll 207 are both concave curved surfaces along their own radial directions.

[0046] In order to realize the adjustment of the diameter of the copper rod, preferably, the first roller seat 209 is further included, the second outer side pressing wheel 205 is rotatably installed on the first roller seat 209, the first roller seat 209 is slidably installed on the first mounting seat 202 and is locked with the first mounting seat 202 through a first locking member; the first roller seat 209 slides towards or away from the second mounting seat 206; the second roller seat 210 is further included, the inner side pressing wheel 208 is rotatably installed on the second roller seat 210, the second roller seat 210 is slidably installed on the second mounting seat 206 and is locked with the second mounting seat 206 through a second locking member; the second roller seat 210 slides towards or away from the first mounting seat 202. The first roller seat 209 provides rotatable installation support for the second outer side pressing wheel 205, the first roller seat 209 and the first mounting seat 202 are slidably matched through a first sliding block and sliding groove structure, when the first roller seat 209 is adjusted to a suitable position, the first mounting seat 202 and the first roller seat 209 are locked through the first locking member. The first locking member can be a bolt or a latch. The second roller seat 210 provides rotatable installation support for the inner side pressing wheel 208, the second roller seat 210 and the second mounting seat 206 are slidably matched through a second sliding block and sliding groove structure, when the second roller seat 210 is adjusted to a suitable position, the second mounting seat 206 and the second roller seat 210 are locked through the second locking member. The second locking member can be a bolt or a latch. By adjusting the first roller seat 209 to a suitable position and locking and adjusting the second roller seat 210 to a suitable position and locking, the diameter of the copper rod is adjusted.

[0047] In the actual production process, the copper rod is prone to be upwardly warped when output from the second pinch roller set 219, which is not conducive to the continuous coiling of the copper rod downwardly. In order to solve the above technical problem, preferably, the horizontal arrangement of the pressing down roller 215 is further included, the pressing down roller 215 is rotatably connected with the first mounting seat 202 through the roller seat 216; the pressing down roller 215 is located below the discharge end of the bending deformation channel. The first mounting seat 202 provides installation support for the pressing down roller 215, after the front end of the copper rod is discharged from the second pinch roller set 219, the copper rod is conveyed to below the pressing down roller 215, the pressing down roller 215 presses the continuously conveyed bent copper rod, which is conducive to the continuous coiling of the copper rod downwardly and then falling into the rod collecting trolley. The pressing down roller 215 is in rolling cooperation with the bent copper rod, and the friction is small.

[0048] Preferably, the axial directions of the first guide wheel 203, the first outer side pressing wheel 204, the second outer side pressing wheel 205, the second guide wheel 207 and the inner side pressing wheel 208 are perpendicular to the axial direction of the pressing down roller 215.

[0049] As a further preferred, a horizontally arranged feeding cylinder 217 is further included, which is installed at the feeding rod opening 201. The feeding cylinder 217 is welded to the frame 200, and is a cylinder structure with both ends open, and the feeding passage of the feeding cylinder 217 corresponds to the feeding end of the bending deformation passage. The feeding cylinder 217 provides a guiding function for the feeding of the rough copper rod.

[0050] The above is the specific embodiment of the present application, and from the implementation process, it can be seen that the present application provides an open-close type copper rod material pre-bending mechanism. In the process of continuous production, after the rough copper rod is cut off, it is beneficial for the head of the subsequent rough copper rod to be coiled to enter the bending deformation passage, and it is beneficial for the previous rough copper rod to fall into the rod collecting trolley. The change basket operation does not affect the continuous production, and ensures the collection of the rough copper rod in the process of continuous production line.

Claims

1. A pre-bending mechanism for open-close copper rod, characterized in that: The rack (200), the first mounting seat (202), the second mounting seat (206), the first roller mechanism and the second roller mechanism are included. The first mounting seat (202) is rotatably connected with the rack (200) through a first rotating seat (211), and a driving device (212) for driving the first mounting seat (202) to swing is installed on the rack (200); the first rotating seat (211) is a hinge; the first roller mechanism includes a first guide wheel (203) and an outer side pressure roller, and the first guide wheel (203) and the outer side pressure roller are both installed on the first mounting seat (202); The second mounting seat (206) is fixedly installed on the rack (200) and is located on the same side of the first mounting seat (202); the second roller mechanism includes a second guide wheel (207) and an inner side pressure roller (208), and the second guide wheel (207) and the inner side pressure roller (208) are both installed on the second mounting seat (206); The first guide wheel (203) and the second guide wheel (207) are arranged in pairs and form a pinch roller set used in cooperation; A rod inlet (201) is formed on the rack (200), a curved deformation channel is formed between the first roller mechanism and the second roller mechanism, the inlet end of the curved deformation channel is arranged corresponding to the rod inlet (201); the outer side pressure roller is located on the outer bending side of the curved deformation channel, the inner side pressure roller (208) is located on the inner bending side of the curved deformation channel, and the outer side pressure roller and the inner side pressure roller (208) are staggered arranged along the direction from the inlet end to the outlet end of the curved deformation channel; A horizontal arranged pressing down roller (215) is further included, and the pressing down roller (215) is rotatably connected with the first mounting seat (202) through a roller seat (216); the pressing down roller (215) is located below the outlet end of the curved deformation channel.

2. The open-close type copper rod pre-bending mechanism according to claim 1, characterized in that: A pre-positioning structure is further included, and the pre-positioning structure includes a mounting plate (220), a bolt (221) and a positioning plate (222); The mounting plate (220) is connected with the second mounting seat (206) and located below the second mounting seat (206); the positioning plate (222) is connected with the first mounting seat (202) and located below the first mounting seat (202); the mounting plate (220) and the positioning plate (222) are respectively located on both sides of the curved deformation channel and correspondingly arranged; The bolt (221) is installed on the mounting plate (220) and abuts with the positioning plate (222).

3. The open-close type copper rod pre-bending mechanism according to claim 1, characterized in that: The driving device (212) is located on the side opposite to the first mounting seat (202) and the second mounting seat (206).

4. The open-close copper rod pre-bending mechanism of claim 1, wherein: The pinch roller set includes a first pinch roller set (218) arranged adjacent to the rod inlet (201); The outer side pressure roller includes a first outer side pressure roller (204), and the first outer side pressure roller (204) is located on the side of the first guide wheel (203) away from the rod inlet (201). The inner side pressing wheel (208) is located on the side of the second guide wheel (207) of the first pinch roll group (218) away from the feeding port (201) and cooperates with the first outer side pressing wheel (204).

5. The open-close copper rod pre-bending mechanism of claim 4, wherein: The pinch roll group further comprises a second pinch roll group (219), and the first pinch roll group (218) and the second pinch roll group (219) are arranged in sequence in the direction away from the feeding port (201); The inner side pressing wheel (208) is located between the second guide wheel (207) of the first pinch roll group (218) and the second guide wheel (207) of the second pinch roll group (219); The first outer side pressing wheel (204) is located between the first guide wheel (203) of the first pinch roll group (218) and the first guide wheel (203) of the second pinch roll group (219); The outer side pressing wheel further comprises a second outer side pressing wheel (205), and the second outer side pressing wheel (205) is located on the side of the first guide wheel (203) of the second pinch roll group (219) away from the first outer side pressing wheel (204).

6. The open-close copper rod pre-bending mechanism of claim 5, wherein: Further comprising a first roller seat (209), the second outer side pressing wheel (205) is rotatably installed on the first roller seat (209), the first roller seat (209) is slidably installed on the first mounting seat (202) and is locked with the first mounting seat (202) through a first locking member; the first roller seat (209) slides towards or away from the second mounting seat (206); Further comprising a second roller seat (210), the inner side pressing wheel (208) is rotatably installed on the second roller seat (210), the second roller seat (210) is slidably installed on the second mounting seat (206) and is locked with the second mounting seat (206) through a second locking member; the second roller seat (210) slides towards or away from the first mounting seat (202).

7. The open-close copper rod pre-bending mechanism of claim 1, wherein: Further comprising a horizontally arranged feeding cylinder (217), and the feeding cylinder (217) is installed at the feeding port (201).

8. The open-close copper rod pre-bending mechanism of claim 1, wherein: The first mounting seat (202) and the second mounting seat (206) are both horizontally arranged.

9. The open-close copper rod pre-bending mechanism of claim 1, wherein: The driving device (212) is a pneumatic cylinder.

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