Material clamping mechanism suitable for metal round bars of multiple specifications

Abstract

The utility model discloses a material clamping mechanism suitable for metal round bars of multiple specifications in the technical field of metal round bar machining, the material clamping mechanism is provided with a thick metal round bar clamping part and a thin metal round bar clamping part, and the thin metal round bar clamping part is fixedly arranged at the center position of the thick metal round bar clamping part; the part, used for clamping the thin metal round bar, of the thin metal round bar clamping part is a continuous clamping surface, so that the probability that the thin metal round bar is damaged by clamping is reduced; the portion, used for clamping the thick metal round bars, of the thick metal round bar clamping part is a staggered V-shaped face so that the thick metal round bars of different diameters can be clamped.

Description

Technical Field

[0001] The utility model relates to the technical field of metal round bar processing, and particularly relates to a clamping mechanism suitable for multi-specification metal round bars. Background Art

[0002] An automatic feeding machine automatically feeds metal round bars to machine tools for processing. In general, the existing automatic feeding machines first place the metal round bars on a supporting platform, and then use a feeding mechanism to push the metal round bars towards the machine tool.

[0003] The feeding of metal round bars includes primary feeding and secondary feeding. Primary feeding is that the feeding mechanism directly pushes the metal round bar along the supporting platform towards the machine tool. Secondary feeding is that the feeding mechanism pushes a feeding rod, and the feeding rod pushes the metal round bar. When the feeding rod pushes the metal round bar, the end of the metal round bar will insert into the cavity at the end of the feeding rod, which can prevent the metal round bar from falling off the material clamp on the feeding rod during the processing rotation.

[0004] During secondary feeding, a clamping mechanism is required to clamp and fix the metal round bar so that the end of the metal round bar can be inserted into the pushed feeding rod. And after a metal round bar is processed, the tail material left in the feeding rod cannot be processed. Therefore, a clamping mechanism is needed to clamp and fix the tail material of the metal round bar, and then the feeding rod moves in the reverse direction to make the tail material of the metal round bar break away from the feeding rod.

[0005] The existing clamping mechanisms generally use two staggered V-shaped blocks to clamp the metal round bar. When clamping, a shearing force will be generated on the metal round bar, which is likely to bend or break the thin metal round bar. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a clamping mechanism suitable for multi-specification metal round bars, so as to solve the technical problem that in the prior art, the clamping mechanism generally uses two staggered V-shaped blocks to clamp the metal round bar, and a shearing force will be generated on the metal round bar when clamping, which is likely to bend or break the thin metal round bar.

[0007] To solve the above technical problem, the utility model specifically provides a clamping mechanism suitable for multi-specification metal round bars. The clamping mechanism is provided with a clamping part for thick metal round bars and a clamping part for thin metal round bars, and the clamping part for thin metal round bars is fixedly arranged at the central position of the clamping part for thick metal round bars;

[0008] The part of the clamping part for thin metal round bars used for clamping thin metal round bars is a continuous clamping surface, so as to reduce the probability of the thin metal round bar being clamped and / or bent.

[0009] The part of the clamping portion for the thick metal round bar that is used to clamp the thick metal round bar is an alternating V-shaped surface, which is used to clamp thick metal round bars with different diameters.

[0010] As a preferred embodiment of the present invention, the material clamping mechanism includes a first material clamping block and a second material clamping block arranged oppositely, and the first material clamping block and the second material clamping block can slide close to each other to clamp the metal round bar.

[0011] The clamping portion for the thick metal round bar includes a first short V-shaped groove and a second short V-shaped groove respectively arranged on the first material clamping block and the second material clamping block, and the first short V-shaped groove and the second short V-shaped groove are arranged in a staggered manner.

[0012] As a preferred embodiment of the present invention, a continuous long V-shaped groove is arranged at a position corresponding to the center of the first short V-shaped groove on the first material clamping block, the long V-shaped groove is parallel to the wall surface of the first short V-shaped groove, and a material clamping plane is arranged at a position corresponding to the center of the second short V-shaped groove on the second material clamping block.

[0013] As a preferred embodiment of the present invention, the center position of the second short V-shaped groove is set to a plane coplanar with the material clamping plane.

[0014] As a preferred embodiment of the present invention, a V-shaped block that can be mutually engaged with the first short V-shaped groove is arranged on the second material clamping block, and the material clamping plane is arranged at the top of the V-shaped block.

[0015] The present invention has the following beneficial effects compared with the prior art:

[0016] When the material clamping mechanism clamps the metal round bar, it can adaptively use the continuous clamping surface of the clamping portion for the thin metal round bar to clamp the thin metal round bar, avoiding the thin metal round bar from being bent or broken by the shearing force; it uses the alternating V-shaped surfaces of the clamping portion for the thick metal round bar to clamp the thick metal round bar, and can clamp thick metal round bars with different diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained according to the provided drawings.

[0018] Figure 1 It is a schematic structural diagram of the blanking device and the material receiving device from the first perspective in the embodiment of the present invention;

[0019] Figure 2It is a schematic structural diagram of the blanking device and the material receiving device from the second perspective in the embodiment of the present utility model;

[0020] Figure 3 It is a schematic structural diagram of the blanking device and the material receiving device from the third perspective in the embodiment of the present utility model;

[0021] Figure 4 It is Figure 2 a partial enlarged schematic diagram;

[0022] Figure 5 It is Figure 3 a partial enlarged schematic diagram;

[0023] Figure 6 It is a cross-sectional schematic diagram of the special-shaped rotating shaft in the embodiment of the present utility model;

[0024] Figure 7 It is a schematic structural diagram of the clamping mechanism in the embodiment of the present utility model;

[0025] Figure 8 It is a schematic structural diagram of the first clamping block in the embodiment of the present utility model;

[0026] Figure 9 It is a schematic structural diagram of the second clamping block in the embodiment of the present utility model;

[0027] Figure 10 It is a schematic structural diagram of the cover plate and the feeding rod in the embodiment of the present utility model.

[0028] The reference numerals in the figure are respectively represented as follows:

[0029] 1 - supporting platform;

[0030] 2 - blanking device, 201 - fixed toothed plate, 202 - movable toothed plate, 203 - special-shaped rotating shaft, 204 - round shaft, 205 - camshaft, 206 - slope;

[0031] 3 - material receiving device, 301 - shaft rod, 302 - cylinder, 303 - material receiving piece, 304 - material guiding slope, 305 - connecting block, 306 - supporting plate.

[0032] 4 - feeding mechanism;

[0033] 5 - clamping mechanism, 501 - first clamping block, 502 - second clamping block, 503 - first short V-shaped groove, 504 - long V-shaped groove, 505 - clamping plane, 506 - V-shaped block, 507 - second short V-shaped groove;

[0034] 6 - cover plate, 601 - upper groove, 602 - lower groove, 603 - lifting plate group, 604 - vertical frame. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] The present invention specifically provides a metal round bar feeder, including:

[0037] A supporting platform 1 for supporting the metal round bar, and the supporting surface of the supporting platform 1 is set to be V-shaped, capable of maintaining the metal round bar at the central position of the supporting platform 1;

[0038] A blanking device 2, the installation position of the blanking device 2 is higher than the supporting platform 1, and is used for sequentially placing the metal round bars onto the supporting platform 1;

[0039] A material receiving device 3, which can be turned over and lapped between the center of the supporting platform 1 and the discharge end of the blanking device 2, so that the metal round bar placed by the blanking device 2 can directly fall onto the center of the supporting platform 1;

[0040] A supporting plate 306, coaxially installed with the material receiving device 3, and an included angle is provided between the supporting plate 306 and the material receiving device 3, so that when the material receiving device 3 turns over to receive the material, the supporting plate 306 can turn downwards and overturn to discard the end tail material of the previous metal round bar;

[0041] A clamping mechanism 5 for clamping the metal round bar on the supporting platform 1;

[0042] A feeding mechanism 4 for pushing the metal round bar on the supporting platform towards the processing machine tool;

[0043] The clamping mechanism 5 is arranged at the end of the supporting platform 1.

[0044] It should be noted that the diameter of the metal round bar in the present invention is generally 0.5 - 12 mm.

[0045] The working process of the above-mentioned metal feeder is as follows:

[0046] Use the blanking device 2 to deliver the metal round bar to the supporting platform 1. Before that, the material receiving device 3 is turned over to between the center of the supporting platform 1 and the discharge end of the blanking device 2, so that the metal round bar placed by the blanking device 2 can directly fall onto the center position of the V-shaped supporting platform 1 along the material receiving device 3, so as to prevent the metal round bar from being stuck by the oil stain on the surface of the supporting platform 1, resulting in the metal round bar being unable to roll to the working position at the center of the supporting platform 1.

[0047] When the metal round bar is placed on the supporting platform 1, the feeding rod is lifted by the hanging device to avoid interfering with the metal round bar.

[0048] After the metal round bar falls onto the supporting platform 1, the material receiving device 3 flips away from the supporting platform 1 to avoid interfering with the feeding mechanism 4 that pushes the metal round bar to move.

[0049] While the material receiving device 3 flips away from the supporting platform 1, the supporting plate 306 coaxially installed with it flips to be parallel and aligned with the supporting platform 1, and the supporting plate 306 and the supporting platform 1 jointly support the metal round bar.

[0050] Then the feeding mechanism 4 makes the first push on the metal round bar, initially pushing the metal round bar towards the processing machine tool, and then the feeding mechanism 4 resets.

[0051] Then the feeding rod is lowered so that the front end of the feeding rod is located behind the rear end of the metal round bar; through the clamping mechanism 5, the metal round bar on the supporting platform 1 is clamped, and then the feeding mechanism 4 pushes the feeding rod so that the end of the metal round bar enters the feeding rod, so as to make the second push on the metal round bar through the feeding rod.

[0052] It should be noted that the reason why the clamping mechanism 5 clamps the metal round bar first and then the feeding rod is pushed forward, that is, after the metal round bar is inserted into the feeding rod first and then the clamping mechanism 5 is loosened, is that if the clamping mechanism 5 loosens the metal round bar first, the metal round bar cannot be inserted into the feeding rod.

[0053] After processing one metal round bar, the clamping mechanism 5 clamps the tail material of the metal round bar again, the pushing device 4 retracts, pulls out the tail material of the metal round bar in the feeding rod, and then the clamping mechanism 5 loosens the tail material of the metal round bar, so that the tail material of the metal round bar naturally falls into the chassis (before feeding, the supporting plate 306 has already flipped to the vertical position, and the tail material cannot fall on the supporting plate 306, but directly drops. It only plays a role in supporting the material during work and does not need to support the material during feeding. If it supports the material during feeding, when it flips to the vertical position again, the tail material will stick to 306 and may not be able to drop).

[0054] After processing one metal round bar, the material receiving device 3 is rotated and lapped between the center of the supporting platform 1 and the discharge end of the blanking device 2, so that the metal round bar dropped by the blanking device 2 can directly fall onto the center of the supporting platform 1.

[0055] While the above-mentioned material receiving device 3 flips to receive the material, the supporting plate 306 also flips synchronously. The supporting plate 306 will flip downward so that its supporting surface overturns downward, discarding the tail material of the metal round bar on it to avoid hindering the new metal round bar.

[0056] After processing one metal round bar, the blanking device 2 and the material receiving device 3 cooperate again to drop the next metal round bar onto the supporting platform 1.

[0057] Furthermore, the blanking device 2 includes a fixed toothed plate 201 and a movable toothed plate 202 arranged in parallel. A plurality of teeth for temporarily storing metal round bars are equally spaced at the upper ends of the fixed toothed plate 201 and the movable toothed plate 202;

[0058] Both sides of the fixed toothed plate 201 and the movable toothed plate 202 are connected by a special-shaped rotating shaft 203. The connecting section of the special-shaped rotating shaft 203 and the fixed toothed plate 201 is a circular shaft 204, and the connecting section of the special-shaped rotating shaft 203 and the movable toothed plate 202 is a camshaft 205;

[0059] When the special-shaped rotating shaft 203 rotates, it can drive the movable toothed plate 202 to make a step-by-step movement relative to the fixed toothed plate 201, so as to convey the metal round bars temporarily stored in the teeth to the supporting platform 1. When the special-shaped rotating shaft 203 rotates one circle, the movable toothed plate 202 conveys all the metal round bars by the distance of one tooth.

[0060] Specifically, when the special-shaped rotating shaft 203 rotates, the fixed toothed plate 201 does not move, and the camshaft 205 will drive the movable toothed plate 202 to move upward to lift the metal round bar in the fixed toothed plate 201. As the camshaft 205 continues to rotate, it will drive the movable toothed plate 202 to move downward and at the same time move forward, and then place the metal round bar on the fixed toothed plate 201. At this time, the metal round bar moves forward by the distance of one tooth relative to the fixed toothed plate 201. That is, when the special-shaped rotating shaft 203 rotates one circle, the movable toothed plate 202 conveys all the metal round bars by the distance of one tooth.

[0061] Furthermore, downwardly inclined slopes 206 are provided at the discharge ends of the movable toothed plate 202 and the fixed toothed plate 201 to ensure that the metal round bars can roll down smoothly.

[0062] When the movable toothed plate 202 conveys the metal round bar forward, the metal round bar at the forefront of the fixed toothed plate 201 will be conveyed onto the slope 206, so that the forefront metal round bar rolls towards the supporting platform 1 under the action of gravity.

[0063] Furthermore, the material receiving device 3 includes a shaft rod 301, a cylinder 302 and a material receiving piece 303;

[0064] A material guiding slope 304 is provided on one side of the material receiving piece 303, and the material receiving piece 303 is fixedly installed on the shaft rod 301;

[0065] The head end of the cylinder 302 is connected to the shaft rod 301 through a connecting block 305. The connecting block 305 is rotatably connected to the head end of the cylinder 302, and the connecting block 305 is fixedly connected to the shaft rod 301. The tail end of the cylinder 302 is rotatably installed on the frame;

[0066] The rotation of the shaft 301 can be controlled by the telescopic movement of the air cylinder 302, and further the flipping of the feeding piece 303 can be controlled. Specifically as follows:

[0067] When the air cylinder 302 is in the retracted state, the material guiding slope 304 of the feeding piece 303 is located between the center of the supporting platform 1 and the discharging end of the blanking device 2, and the material guiding slope 304 is flush with the slope 206;

[0068] When the air cylinder 302 is in the extended state, the feeding piece 303 is far away from the supporting platform 1, so as to facilitate the feeding mechanism 4 to push the metal round bar located in the supporting platform 1.

[0069] Furthermore, the connecting block 305 is also fixedly connected with the material supporting plate, and the shape of the material supporting plate 306 is the same as that of the supporting platform 1;

[0070] When the air cylinder 302 is in the extended state, the material supporting plate 306 is flush with the supporting platform 1 and is used to support the metal round bar;

[0071] When the air cylinder 302 is in the retracted state, the material supporting plate 306 overturns downward to discard the end of the metal round bar.

[0072] The feeding of the metal round bar includes primary feeding and secondary feeding. Primary feeding is that the feeding mechanism directly pushes the metal round bar to move along the supporting platform towards the machine tool equipment. Secondary feeding is that the feeding mechanism pushes the feeding rod, and the feeding rod pushes the metal round bar. When the feeding rod pushes the metal round bar, the end of the metal round bar will be inserted into the cavity at the end of the feeding rod, which can prevent the metal round bar from falling off the material clamp on the feeding rod during the processing rotation;

[0073] The purpose of primary feeding and secondary feeding is to reduce the length of the machine. If the feeding rod is not lifted and then retracted backward, the blanking of the metal round bar can be avoided, but in that case, the machine will be extremely long.

[0074] During secondary feeding, it is necessary to use the clamping mechanism to clamp and fix the metal round bar so that the end of the metal round bar can be inserted into the pushed feeding rod; and after a metal round bar is processed, the tail material left in the feeding rod cannot be processed. Therefore, it is necessary to use the clamping mechanism to clamp and fix the tail material of the metal round bar, and then the feeding rod moves in the reverse direction to make the tail material of the metal round bar break away from the feeding rod;

[0075] The existing clamping mechanism generally uses two staggered V-shaped blocks to clamp the metal round bar, and shear force will be generated on the metal round bar during clamping, which is likely to bend or break the thin metal round bar.

[0076] To solve the above problems, the clamping mechanism 5 in the present invention is provided with a clamping part for thick metal round bars and a clamping part for thin metal round bars, and the clamping part for thin metal round bars is fixedly arranged at the central position of the clamping part for thick metal round bars;

[0077] The part of the thin metal rod clamping portion for clamping the thin metal rod is a continuous clamping surface, so as to reduce the probability of the thin metal rod being scratched and / or bent.

[0078] The part of the thick metal rod clamping portion for clamping the thick metal rod is an interleaved V-shaped surface, which is used to clamp thick metal rods with different diameters.

[0079] The working principle of the above-mentioned material clamping mechanism 5 is as follows:

[0080] The thick metal rod clamping portion and the thin metal rod clamping portion are integrally arranged. When clamping the thick metal rod, the interleaved V-shaped surfaces of the thick metal rod clamping portion first contact the thick metal rod, and the outer wall of the thick metal rod is squeezed against the V-shaped surface to clamp the thick metal rod. The setting of the V-shaped surface can be applicable to thick metal rods with different diameters.

[0081] When clamping the thin metal rod, since the metal rod is thin, the thick metal rod clamping portion will not clamp the thin metal rod. Instead, the thin metal rod clamping portion located at the center position of the thick metal rod clamping portion will clamp the thin metal rod. Since the part for clamping the thin metal rod is a continuous clamping surface, it can prevent the thin metal rod from being clamped and broken or bent by the interleaved V-shaped surface.

[0082] In summary, when the material clamping mechanism 5 clamps the metal rod, it can adaptively use the continuous clamping surface of the thin metal rod clamping portion to clamp the thin metal rod, avoiding the thin metal rod from being bent or broken by the shearing force; it uses the interleaved V-shaped surface of the thick metal rod clamping portion to clamp the thick metal rod, and can clamp thick metal rods with different diameters.

[0083] Further, the material clamping mechanism 5 includes a first clamping block 501 and a second clamping block 502 which are arranged oppositely. The first clamping block 501 and the second clamping block 502 can slide close to each other to clamp the metal rod.

[0084] The thick metal rod clamping portion includes a first short V-shaped groove 503 and a second short V-shaped groove 507 which are respectively arranged on the first clamping block 501 and the second clamping block 502, and the first short V-shaped groove 503 and the second short V-shaped groove 507 are arranged in a staggered manner.

[0085] When using the above-mentioned material clamping mechanism 5 to clamp the metal rod, the two clamping blocks can slide close to each other under the drive of a cylinder or other power source to clamp the metal rod located between the two clamping blocks.

[0086] When clamping the thick metal rod, the first short V-shaped groove 503 and the second short V-shaped groove 507 arranged in a staggered manner on the two clamping blocks approach each other until the outer wall of the thick metal rod abuts against the groove surface of the short V-shaped groove. At this time, at least four points on the outer wall of the thick metal rod are fixed, that is, the clamping of the thick metal rod is completed.

[0087] Further, a continuous long V-shaped groove 504 is provided at a position corresponding to the center of the first short V-shaped groove 503 on the first clamping block 501. The long V-shaped groove 504 is parallel to the wall surface of the first short V-shaped groove 503. A clamping plane 505 is provided at a position corresponding to the center of the second short V-shaped groove 507 on the second clamping block 502.

[0088] When clamping the thin metal round bar, the two clamping blocks still approach each other. Since the diameter of the metal round bar is small, the first short V-shaped groove 503 and the second short V-shaped groove 507 for fixing the thick metal round bar cannot contact the thin metal round bar. As the two clamping blocks continue to approach, the thin metal round bar is finally fixed in the long V-shaped groove 504 by being abutted by the clamping plane 505. Both the long V-shaped groove 504 and the clamping plane 505 are continuous clamping surfaces, and no shearing force will be generated on the thin metal round bar, avoiding the thin metal round bar from being clamped and bent or clamped and broken.

[0089] Further, the center position of the second short V-shaped groove 507 is set to a plane coplanar with the clamping plane 505.

[0090] Or it is also possible to set the clamping plane 505 to protrude from the center of the second short V-shaped groove 507, as long as the clamping plane 505 can contact the thin metal round bar prior to the second short V-shaped groove 507, and at the same time the second short V-shaped groove 507 can contact the thick metal round bar prior to the clamping plane 505.

[0091] Further, a V-shaped block 506 capable of being mutually fitted with the first short V-shaped groove 503 is provided on the second clamping block 502, and the clamping plane 505 is provided at the top of the V-shaped block 506.

[0092] The above setting can prevent the clamping plane 505 from being blocked by the first short V-shaped groove 503 when approaching the long V-shaped groove 504.

[0093] In the prior art, when the feeding mechanism 4 pushes the metal round bar, since the metal round bar is relatively thin, the metal round bar is likely to deviate or bulge and bend under the thrust force.

[0094] To solve the above problems, the metal round bar feeder of the present utility model further includes a cover plate 6 provided above the supporting platform 1, and the cover plate 6 is installed on a cylinder;

[0095] An upper groove 601 and a lower groove 602 are respectively provided at the lower end of the cover plate 6 and the upper end of the supporting platform 1;

[0096] The cover plate 6 can be lifted upward under the drive of the cylinder to facilitate the metal round bar to drop onto the supporting platform 1;

[0097] The cover plate 6 can be driven by a cylinder to descend, and the upper groove 601 and the lower groove 602 are closed to reduce the movable space of the metal round bar and maintain the spatial position and shape of the metal round bar.

[0098] The use process of the above-mentioned feeding rod and cover plate is as follows:

[0099] When putting the metal round bar on the supporting platform 1, the cylinder drives the cover plate 6 to move upward to avoid the cover plate 6 interfering with the putting of the metal round bar, so that the metal round bar can normally fall into the lower groove 602 of the supporting platform 1.

[0100] After the metal round bar is put in place, the cylinder drives the cover plate 6 to move downward, so that the upper groove 601 and the lower groove 602 are closed, restraining the metal inside and reducing the movable space of the metal round bar, which can avoid the metal round bar from running off track and bulging and bending.

[0101] Finally, the feeding mechanism 4 pushes the metal round bar. When the feeding mechanism 4 approaches the cover plate 6, the cover plate 6 rises so that the feeding mechanism 4 can pass through normally.

[0102] A plurality of cover plates 6 are arranged on the supporting platform 1 and rise successively as the feeding mechanism 4 moves.

[0103] In summary, by arranging the cover plate 6 above the supporting platform 1, the utility model can restrain the movable space of the metal round bar during the feeding of the metal round bar, and avoid the metal round bar from running off track and bulging and bending.

[0104] Further, when the upper groove 601 and the lower groove 602 are closed, the shape is circular, and the circular shape fits the shape of the metal round bar better.

[0105] Further, in order to avoid damage to the contact surface when the cover plate 6 abuts against the supporting platform 1, the lower part of the cover plate 6 is set to be V-shaped so as to fit the upper surface of the supporting platform 1.

[0106] Further, a plurality of cover plates 6 are arranged above the supporting platform 1.

[0107] Further, the upper end of the cover plate 6 is fixedly installed at one end of the lifting plate group 603, the other end of the lifting plate group 603 is slidably connected to the vertical frame 604, and the piston rod of the cylinder is fixedly connected to the lifting plate group 603 to drive the lifting plate group 603 to slide up and down along the vertical frame 604.

[0108] The above embodiments are only exemplary embodiments of the present application and are not used to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements within the essence and protection scope of the present application, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present application.

Claims

1. A clamping mechanism suitable for metal round bars of various specifications, characterized in that: The clamping mechanism (5) is provided with a thick metal round bar clamping portion and a thin metal round bar clamping portion, and the thin metal round bar clamping portion is fixedly arranged at the center position of the thick metal round bar clamping portion; The thin metal round bar clamping part is used to clamp the thin metal round bar, and the part thereof is a continuous clamping surface, so as to reduce the probability of the thin metal round bar being clamped and / or bent; The portion of the thick metal round bar clamping part used for clamping the thick metal round bar is a staggered V-shaped surface, so as to be used for clamping the thick metal round bars with different diameters.

2. A clamping mechanism suitable for metal round bars of various specifications according to claim 1, characterized in that: The clamping mechanism (5) comprises a first clamping block (501) and a second clamping block (502) which are arranged opposite to each other, and the first clamping block (501) and the second clamping block (502) can slide close to each other to clamp the metal round bar; The thick metal round bar clamping part comprises a first short V-shaped groove (503) and a second short V-shaped groove (507) respectively arranged on a first clamping block (501) and a second clamping block (502), and the first short V-shaped groove (503) and the second short V-shaped groove (507) are staggered.

3. A clamping mechanism suitable for metal round bars of various specifications according to claim 2, characterized in that: A continuous long V-shaped groove (504) is arranged on the first clamping block (501) at a position corresponding to the center of the first short V-shaped groove (503), and the wall surface of the long V-shaped groove (504) and the first short V-shaped groove (503) are parallel to each other. A clamping plane (505) is arranged on the second clamping block (502) at a position corresponding to the center of the second short V-shaped groove (507).

4. The clamping mechanism for metal round bars of various specifications according to claim 3 is characterized in that: The center position of the second short V-shaped groove (507) is set to be a plane coplanar with the clamping plane (505).

5. The clamping mechanism for metal round bars of various specifications according to claim 3 is characterized in that: The second clamping block (502) is provided with a V-shaped block (506) which can be engaged with the first short V-shaped groove (503), and the clamping plane (505) is provided on the top of the V-shaped block (506).

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