Bar holding device for bar cutting machine

Abstract

The present application relates to a bar clamping device for a bar cutting machine, in the field of bar cutting equipment, comprising a workbench, provided with two mutually parallel first bases, each slidably connected to a second base, the second bases moving toward or away from the workbench, a first adjustment assembly provided on the sidewall of the first base for driving the movement of the second bases; a crossbar connected to the upper ends of the two second bases, a pressing cylinder vertically mounted on the crossbar, the piston rod of the pressing cylinder passing downward through the crossbar and connected to a base block, both ends of the base block being connected to a clamping block for clamping the bar via a second adjustment assembly. The present application has the effect of increasing the applicability of the clamping device to bars of different sizes.

Description

Technical Field

[0001] The present application relates to the field of bar cutting equipment, and in particular to a bar pressing device of a bar cutting machine. Background Art

[0002] A bar cutting machine is a cutting tool used to cut bar stock. It primarily consists of a cutting mechanism, a feeding mechanism, a clamping mechanism, and an automatic controller. The clamping mechanism typically consists of a clamping cylinder, a bracket, and a clamping block. While the cutting tool is cutting the bar stock, the clamping cylinder's piston rod is controlled to extend and retract to hold the bar in place.

[0003] Since the stroke of the piston rod of the clamping cylinder is fixed, the distance between the clamping block worktables set on the piston rod is fixed, and the distance between the rod and the clamping block cannot be adjusted according to the diameter of the rod, and the scope of application is small. Summary of the Invention

[0004] In order to improve the problem of the small application range of the clamping device, the present application provides a bar clamping device for a bar cutting machine.

[0005] The bar pressing device of the bar cutting machine provided in this application adopts the following technical solution:

[0006] A bar pressing device for a bar cutting machine includes a workbench, wherein the workbench is provided with two mutually parallel first bases, each of the first bases being slidably connected to a second base, the second base being movable toward or away from the workbench, and a first adjustment assembly being provided on a side wall of the first base for driving the second base to move;

[0007] The upper ends of the two second bases are connected to a cross bar, on which a pressing cylinder is vertically installed. The piston rod of the pressing cylinder passes downward through the cross bar and is connected to a base block. Both ends of the base block are connected to a clamping block for clamping the rod through a second adjusting assembly.

[0008] By adopting the above technical solution, the pressing cylinder drives the base block to move downward, pressing the rod on the workbench, and at the same time the two clamping blocks clamp the rod to limit the movement of the rod; when the size of the rod changes, the operator can adjust the height position of the pressing cylinder through the first adjusting component and adjust the distance between the two clamping blocks through the second adjusting component, so that the combination of the base block and the clamping block can maintain effective fixation of the rod, increasing the applicability of the clamping device.

[0009] Optionally, the first adjustment component includes a screw and a sleeve, the screw is arranged on the side wall of the first base and is parallel to the sliding direction of the second base, the sleeve is arranged on the side wall of the second base, the screw passes upward through the sleeve, and the screw is threadedly connected to an adjustment nut at both ends of the sleeve.

[0010] By adopting the above technical solution, the operator can move the second base up and down by loosening the adjusting nut, thereby adjusting the height position of the pressing cylinder, which is convenient and quick.

[0011] Optionally, the second adjustment component includes an adjustment column, and the adjustment column is provided in two groups, and the number of the adjustment columns in each group is two and parallel to each other. The two groups of adjustment columns are respectively fixed at the two ends of the base block, and the two clamping blocks are respectively passed through the two groups of adjustment columns. The clamping blocks are threadedly connected with a limiting stud that abuts the adjustment column, and the limiting studs correspond one-to-one to the adjustment columns.

[0012] By adopting the above technical solution, the operator can freely move the clamping block by loosening the limit screw and adjust the distance between the two clamping blocks. After adjustment, the operator can fix the clamping block by tightening the limit screw and the adjustment column.

[0013] Optionally, the adjusting column is provided with a limiting surface that abuts against the limiting screw.

[0014] By adopting the above technical solution, the limiting surface increases the contact area between the limiting stud and the adjusting column, thereby improving the stability of the limiting stud after being tightened.

[0015] Optionally, each of the limit studs is slidably connected to a sleeve that moves along its own axial direction, and a gear ring is fixed on the sleeve. The gear ring is rotatably connected to the clamping block, and the clamping block is rotatably connected to a gear shaft that meshes with its two corresponding gear rings, and a hexagonal groove is provided on the gear shaft.

[0016] By adopting the above technical solution, the operator can use a hexagonal wrench to insert into the hexagonal slot to rotate the gear shaft, and the gear shaft drives the two gear rings to rotate synchronously, so that the two limit studs move at the same time, which speeds up the adjustment of the clamp.

[0017] Optionally, through grooves are provided on the opposite sides of the two clamping blocks and on the side of the base block facing the workbench, a slider is slidably connected in the through groove, a roller is rotatably connected to the slider, the slider is connected to the inner wall of the through groove through a first spring, and the slider drives the roller to partially extend out of the through groove under the elastic force of the first spring, and a driving component for driving the movement of the rod is provided on the workbench.

[0018] By adopting the above technical solution, after a section of cutting of the bar is completed, the pressing cylinder drives the base block to move upward, so that the roller extends out of the through slot under the elastic force of the first spring, and the driving component drives the bar forward to feed the material. Each roller rolls along the bar, which on the one hand helps to reduce the resistance encountered by the bar when it moves forward, and on the other hand also plays a role in limiting the bar, so that the bar maintains the cutting accuracy.

[0019] Optionally, the driving assembly includes a belt conveyor, a movable groove is provided on the workbench, the belt conveyor is installed in the movable groove, the workbench is provided with limit plates on both sides of the belt conveyor, and the limit plates are penetrated by a number of guide columns arranged along their own length directions, and each of the guide columns is rotatably connected to a guide wheel at one end facing the belt conveyor, and each of the guide columns is commonly connected to a guide plate at one end facing away from the belt conveyor, and a push cylinder corresponding to the two guide plates is provided on the workbench, and the piston rod of the push cylinder is connected to the guide plate.

[0020] By adopting the above technical solution, the bar is placed on the belt conveyor, which drives the bar forward; the two push cylinders drive the two guide plates closer to each other, so that each guide wheel is against the bar, thereby clamping the bar, reducing the possibility of the bar being offset during the transmission process, thereby ensuring the cutting position accuracy of the bar.

[0021] Optionally, the workbench is rotatably connected to several core shafts distributed along the moving direction of the bar material in the movable groove, the core shafts are located at the output end of the belt conveyor, each of the core shafts is rotatably connected to a roller, and the workbench is provided with a limiting component for limiting the rotation of the roller.

[0022] By adopting the above technical solution, the bar is pressed against the roller. The roller is helpful in reducing the friction resistance encountered by the bar when moving, and is helpful in increasing the bearing capacity of the bar.

[0023] Optionally, the limiting component includes a traction rope and an electromagnet, and the workbench is provided with two vertical plates relatively distributed with respect to the pressing cylinder. The two vertical plates are slidably connected to a limit seat that moves along the height direction of the vertical plate on the opposite side. A limit groove is provided at one end of the limit seat, and the other end is located below the roller and connected to the electromagnet. A limit block is slidably connected in the limit groove, and the limit block is connected to the bottom of the limit groove through a second spring. One end of the traction rope is connected to the limit block, and the other end is connected to the piston rod of the pressing cylinder. The roller is provided with an iron ring that engages with the electromagnet.

[0024] By adopting the above technical solution, the piston rod of the pressing cylinder pulls the traction rope when it moves downward, and the traction rope drives the limit seat to move upward, and the limit seat drives the electromagnet to resist the iron ring, and the electromagnet is energized to attract and replace, thereby limiting the rotation of the roller; the piston rod of the pressing cylinder continues to move downward until the base block resists the rod material, and the limit block stretches the second spring under the pull of the traction rope, and the limit seat drives the electromagnet to maintain a tight state with the iron ring under the action of the tension of the traction rope; since the rotation of the roller is restricted, the stability of the rod material when it is pressed and fixed is improved.

[0025] Optionally, the side wall of the vertical plate is rotatably connected to a pulley for the traction rope to pass around.

[0026] By adopting the above technical solution, the pulley plays a guiding role for the traction rope, so that the traction rope remains straight during the movement.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. When the size of the bar changes, the operator can adjust the height of the pressing cylinder through the first adjustment component and the distance between the two clamping blocks through the second adjustment component, so that the combination of the base block and the clamping block can maintain effective fixation of the bar, expanding the application range of the clamping device;

[0029] 2. The bar is pressed against the rollers. On the one hand, the rollers help reduce the friction resistance of the bar when it moves, and on the other hand, they help increase the bearing capacity of the bar. The rotation of the rollers is restricted by the limiting assembly, which improves the stability of the bar when it is pressed and fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0031] Figure 2 yes Figure 1 Enlarged schematic diagram of part A.

[0032] Figure 3 It is a schematic diagram of the structure of the roller used in the embodiment of the present application.

[0033] Figure 4 It is a structural diagram of the embodiment of the present application used to reflect the restriction component.

[0034] Figure 5 It is a structural diagram of the second adjustment component used in an embodiment of the present application.

[0035] Figure 6 It is a structural diagram of the limit block used in an embodiment of the present application.

[0036] Explanation of reference numerals: 1. workbench; 11. first base; 12. second base; 13. crossbar; 14. press cylinder; 15. base block; 16. clamping block; 2. first adjusting assembly; 21. screw; 22. screw sleeve; 23. adjusting nut; 3. second adjusting assembly; 31. adjusting column; 311. limiting surface; 32. limiting stud; 33. bushing; 331. gear ring; 34. gear shaft; 341. hexagonal slot; 4. through slot; 41. sliding Block; 411, roller; 42, first spring; 5, driving assembly; 51, belt conveyor; 52, moving groove; 53, limit plate; 54, guide column; 541, guide wheel; 55, guide plate; 56, push cylinder; 57, core shaft; 58, roller; 6, limiting assembly; 61, traction rope; 62, electromagnet; 63, vertical plate; 64, limit seat; 641, limit groove; 65, limit block; 651, second spring; 66, iron ring; 67, pulley. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-6 This application is described in further detail.

[0038] The embodiment of the present application discloses a bar pressing device for a bar cutting machine. Figure 1 The bar pressing device of the bar cutting machine includes a workbench 1, on which two first bases 11 parallel to each other are vertically arranged, and the two first bases 11 are slidably connected to a second base 12 that moves along its height direction. The side wall of the first base 11 is provided with a first adjusting component 2 for driving the second base 12 to move toward or away from the workbench 1.

[0039] like Figure 2 The upper ends of the two second bases 12 are commonly connected to a cross bar 13, on which a pressing cylinder 14 is vertically mounted. The piston rod of the pressing cylinder 14 passes downward through the cross bar 13 and is fixed with a base block 15. Both ends of the base block 15 are connected to clamping blocks 16 through the second adjusting assembly 3. The two clamping blocks 16 are provided with inclined contact surfaces on the opposite side. The base block 15 and the clamping block 16 together form a V-shaped block structure.

[0040] like Figure 3 The base block 15 has a side facing the workbench 1 and the two clamping blocks 16 have a through groove 4 on their respective corresponding contact surfaces. The base block 15 and the two clamping blocks 16 are slidably connected with a slider 41 in their respective corresponding through grooves 4. One side of the slider 41 is connected to the inner wall of the through groove 4 through a first spring 42, and the other side is rotatably connected with a roller 411. The axis of the roller 411 corresponding to the base block 15 is parallel to the base block 15, and the roller 411 corresponding to the clamping block 16 is parallel to the inclination direction of the contact surface on the clamping block 16. When the first spring 42 is in a natural state, the roller 411 partially extends out of the notch of the through groove 4.

[0041] like Figure 1 and Figure 4 The workbench 1 is provided with a driving assembly 5 for driving the bar material to move. The driving assembly 5 includes a belt conveyor 51. The workbench 1 is provided with a moving groove 52 extending along its length direction. The moving groove 52 is located between the two first bases 11. The belt conveyor 51 is installed in the moving groove 52, and the transmission direction of the belt conveyor 51 is parallel to the length direction of the moving groove 52. The upper surface of the belt conveyor 51 is higher than the upper surface of the workbench 1. The bar material is placed on the belt conveyor 51 and is driven by the belt conveyor 51 to transmit the material forward. The length of the belt conveyor 51 is small. The length of the movable groove 52 and the output end of the belt conveyor 51 are distributed close to the first base 11. The workbench 1 is rotatably connected in the movable groove 52 with a number of core shafts 57 arranged equidistantly along its length direction. The core shafts 57 are located on one side of the output end of the belt conveyor 51. Each core shaft 57 is rotatably connected to a roller 58. The circumferential vertex of the roller 58 is flush with the upper surface of the belt conveyor 51. The roller 58 close to the output end of the belt conveyor 51 is located directly below the base block 15. The workbench 1 is provided with a limiting component 6 for limiting the rotation of the roller 58.

[0042] like Figure 1 Two limit plates 53 symmetrically distributed about the belt conveyor 51 are vertically provided on the workbench 1. The limit plates 53 are parallel to the belt conveyor 51. Each limit plate 53 is vertically penetrated by a number of guide pillars 54 arranged along its length direction. Each guide pillar 54 is rotatably connected to a guide wheel 541 at one end facing the belt conveyor 51. The axis of the guide wheel 541 is perpendicular to the workbench 1. Each limit plate 53 corresponds to each guide pillar 54 and is commonly connected to a guide plate 55 at the end facing away from the belt conveyor 51; the workbench 1 is equipped with a pushing cylinder 56 on the side of each limit plate 53 facing away from the belt conveyor 51, and the piston rod of the pushing cylinder 56 is vertically connected to the corresponding guide plate 55.

[0043] The cutting machine is mounted on the workbench 1 and located on the side of the first base 11 facing away from the conveyor belt 51. The operator places the bar stock on the conveyor belt 51 and adjusts the position. The two push cylinders 56 are activated and drive the two guide plates 55 toward each other. The guide plates 55 drive the guide posts 54 to move, so that the two sets of guide wheels 541 abut against the bar stock, limiting its deviation. The conveyor belt 51 is activated, driving the bar stock forward. The end of the bar stock passes between the two first bases 11 and moves onto the rollers 58. When the bar stock moves to the cutting machine and extends to the specified length, the pressing cylinder 14 drives the base block 15 downward. During this process, the limiting assembly 6 fixes the rollers 58. The base block 15 continues to move downward and presses the bar stock against the rollers 58. At the same time, the two clamping blocks 16 clamp on both sides of the bar stock. At this time, the rollers 411 move into the slot 4 under the pressure of the bar stock, and the cutting machine starts to cut the bar stock. Since the rollers 58 are used as the support base of the bar, the spacing between the rollers 58 is conducive to the falling and discharge of chips, reducing the accumulation of chips on the workbench 1

[0044] After the cutting is completed, the pressing cylinder 14 drives the base block 15 to move upward, the limiting component 6 releases the fixation of the roller 58, and the roller 411 moves out of the through slot 4 under the elastic thrust of the first spring 42 and contacts the bar. The belt conveyor 51 drives the bar forward, and the guide wheel 541, the roller 411 and the roller 58 roll under the drive of the bar, reducing the resistance encountered by the bar during movement, while also maintaining the position accuracy of the linear movement of the bar and the surface quality of the bar.

[0045] like Figure 4 The first adjusting component 2 includes a screw 21 and a sleeve 22. The screw 21 is arranged on the side wall of the first base 11 and is parallel to the sliding direction of the second base 12. The sleeve 22 is arranged on the side wall of the second base 12 and is coaxially distributed with the screw 21. The screw 21 passes through the sleeve 22 upward, and two adjusting nuts 23 are threadedly connected to the screw 21. The two adjusting nuts 23 are respectively abutted against the upper and lower ends of the sleeve 22 to fix the position of the sleeve 22, thereby limiting the movement of the second base 12; when the height position of the pressing cylinder 14 needs to be adjusted, the operator only needs to twist the adjusting nut 23 to separate it from the sleeve 22, and then move the second base 12 up and down. After adjustment, twist the adjusting nut 23 and tighten it against the sleeve 22, which is convenient and quick.

[0046] like Figure 2 and Figure 5 The second adjustment component 3 includes two groups of adjustment columns 31, each group has two adjustment columns 31 and they are parallel to each other. The two groups of adjustment columns 31 are respectively fixed at both ends of the base block 15 along the length direction, and each adjustment column 31 is provided with a limiting surface 311 extending along its length direction. The limiting surfaces 311 on the two adjustment columns 31 in the same group are flush; the two clamping blocks 16 are respectively passed through the two groups of adjustment columns 31, and each clamping block 16 is threadedly connected with a limiting stud 32 corresponding to the adjustment column 31 through which the clamping block 16 passes. The limiting stud 32 is abutted against the limiting surface 311 to fix the clamping block 16.

[0047] Each limiting stud 32 is slidably connected to a sleeve 33 that moves along its axial direction. A gear ring 331 is arranged and fixed on the outer surface of the sleeve 33. The gear ring 331 is rotatably connected to the clamping block 16. The clamping block 16 is rotatably connected to a gear shaft 34. The gear shaft 34 is parallel to the axis of the gear ring 331 and is located between the two gear rings 331 on its corresponding clamping block 16. The gear shaft 34 is meshed with the two gear rings 331, and a coaxially distributed hexagonal groove 341 is provided at the upper end of the gear shaft 34.

[0048] When the position between the two clamping blocks 16 needs to be adjusted, the operator uses a hexagonal wrench to insert the hexagonal slot 341 to rotate the gear shaft 34, and the gear shaft 34 drives the two gear rings 331 to rotate synchronously, and the gear ring 331 drives the shaft sleeve 33 to rotate, and the shaft sleeve 33 drives the limiting stud 32 to rotate. Since the relative rotation between the shaft sleeve 33 and the limiting stud 32 is restricted, the limiting stud 32 and the shaft sleeve 33 move relative to each other, so that the two limiting studs 32 move away from the adjusting column 31 at the same time. At this time, the operator can freely move the clamping block 16 and adjust the spacing between the two clamping blocks 16. After adjustment, the operator twists the gear shaft 34 in the opposite direction to drive the two limiting studs 32 to press against the adjusting column 31 to fix the corresponding clamping block 16.

[0049] like Figure 4 The limiting component 6 includes two vertical plates 63 that are parallel to each other and vertically fixed on the workbench 1. The two vertical plates 63 are respectively located on the opposite sides of the two first bases 11 and are symmetrically distributed about the pressing cylinder 14. The two vertical plates 63 are both located on the outside of the workbench 1 and extend downward to the bottom of the workbench 1. The two vertical plates 63 are slidably connected to a limit seat 64 that moves along the height direction of the vertical plates 63 on the opposite side.

[0050] like Figure 4 and Figure 6 The upper end of the limit seat 64 is provided with a limit groove 641 extending along its length direction, and the limit groove 641 is parallel to the moving direction of the limit seat 64. The limit seat 64 is slidably connected to the limit block 65 in the limit groove 641, and the limit block 65 is connected to the bottom of the limit groove 641 through a second spring 651. The upper end of the limit block 65 is connected to a traction rope 61, and the end of the traction rope 61 away from the limit block 65 is connected to the piston rod of the pressing cylinder 14, and the connection point between the traction rope 61 and the piston rod of the pressing cylinder 14 is located below the cross bar 13. The side wall of the vertical plate 63 is rotatably connected to a pulley 67 for the traction rope 61 to bypass, and the pulley 67 is located above the limit seat 64.

[0051] An electromagnet 62 is mounted on the end of the limit seat 64 away from the traction rope 61. The electromagnet 62 is located below the roller 58 near the output end of the belt conveyor 51 and corresponds to the end of the roller 58. The end of the roller 58 is provided with an iron ring 66 that attracts the electromagnet 62. The number of electromagnets 62 can be selected, and their positions are distributed in order from near to far according to the distance of the roller 58 from the belt conveyor 51. The corresponding iron ring 66 is provided on the roller 58.

[0052] In the initial state, the rollers 411 on the base block 15 and the two clamping blocks 16 are in contact with the outer surface of the bar stock, and the first spring 42 is in a natural state. When the pressing cylinder 14 drives the base block 15 downward, the traction rope 61 pulls the limit seat 64 upward, and the rollers 411 move into the through slot 4 under the pressure of the bar stock; when the electromagnet 62 contacts the iron ring 66, the electromagnet 62 is energized to attract the iron ring 66, fixing the roller 58. As the base block 15 continues to move downward, the traction rope 61 pulls the limit block 65 upward, and the second spring 651 is stretched and elastically deformed until the base block 15 and the two clamping blocks 16 are in contact with the bar stock, pressing the bar stock against the roller 58, at which point the rollers 411 are completely inserted into the through slot 4.

[0053] After the cutting is completed, the electromagnet 62 is powered off and demagnetized, the pressing cylinder 14 drives the base block 15 to move upward, and the limit block 65 moves back under the elastic tension of the second spring 651. As the base block 15 continues to rise, the second spring 651 returns to its natural state, and the limit seat 64 falls back under its own weight. During this process, the roller 411 gradually extends out of the through slot 4 under the elastic thrust of the first spring 42; when the bar material is fed forward, the three rollers 411 play a role in limiting the bar material.

[0054] The implementation principle of the embodiment of the present application is as follows: the belt conveyor 51 drives the bar material forward, the guide wheels 541 on both sides clamp the bar material and roll along the bar material, and when the bar material exceeds the specified length of the cutting machine, the pressing cylinder 14 drives the base block 15 to move downward, and the traction rope 61 drives the limit seat 64 to move upward under the pull of the piston rod of the pressing cylinder 14, so that the electromagnet 62 and the iron ring 66 are abutted, and the electromagnet 62 is energized to attract the iron ring 66, and then the base block 15 continues to move downward to press the bar material onto the roller 58, and the two clamping blocks 16 clamp the bar material, and the cutting machine starts to cut the bar material.

[0055] When the diameter of the bar changes, the operator can move the second base 12 to adjust the height position of the pressing cylinder 14, move the two clamping blocks 16 to adjust the distance between them, replace or adjust the length of the traction rope 61, so that the length of the traction rope 61 is adapted to the height and stroke of the piston rod of the pressing cylinder 14, meeting the requirements of pressing and fixing bars of different sizes, and having a wide range of applications.

[0056] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A bar pressing device for a bar cutting machine, characterized in that: The invention comprises a workbench (1), wherein the workbench (1) is provided with two mutually parallel first bases (11), the two first bases (11) are both slidably connected to a second base (12), the second base (12) moves toward or away from the workbench (1), and a first adjustment component (2) for driving the second base (12) to move is provided on a side wall of the first base (11); The upper ends of the two second bases (12) are connected with a cross bar (13), a pressing cylinder (14) is vertically mounted on the cross bar (13), a piston rod of the pressing cylinder (14) passes downward through the cross bar (13) and is connected with a base block (15), and both ends of the base block (15) are connected with a clamping block (16) for clamping the bar through a second adjustment assembly (3); A through slot (4) is provided on one side of the two clamping blocks (16) facing each other and on the side of the base block (15) facing the workbench (1). A slider (41) is slidably connected in the through slot (4). A roller (411) is rotatably connected to the slider (41). The slider (41) is connected to the inner wall of the through slot (4) via a first spring (42). Under the elastic force of the first spring (42), the slider (41) drives the roller (411) to partially extend out of the through slot (4). A driving component (5) for driving the bar to move is provided on the workbench (1); The driving assembly (5) includes a belt conveyor (51), a movable groove (52) is provided on the workbench (1), and the belt conveyor (51) is installed in the movable groove (52). The workbench (1) is provided with a limit plate (53) on both sides of the belt conveyor (51), and the limit plate (53) is provided with a plurality of guide pillars (54) arranged along its own length direction. Each of the guide pillars (54) is rotatably connected to a guide wheel (541) at one end facing the belt conveyor (51), and each of the guide pillars (54) is commonly connected to a guide plate (55) at one end facing away from the belt conveyor (51). The workbench (1) is provided with a push cylinder (56) corresponding to the two guide plates (55), and the piston rod of the push cylinder (56) is connected to the guide plate (55); The workbench (1) is rotatably connected to a plurality of core shafts (57) distributed along the moving direction of the bar material in the moving groove (52), the core shafts (57) are located at the output end of the belt conveyor (51), and each core shaft (57) is rotatably connected to a roller (58), and the workbench (1) is provided with a limiting component (6) for limiting the rotation of the roller (58); The limiting assembly (6) includes a traction rope (61) and an electromagnet (62). The workbench (1) is provided with two vertical plates (63) relatively distributed with respect to the pressing cylinder (14). The two vertical plates (63) are slidably connected to a limit seat (64) that moves along the height direction of the vertical plates (63) on opposite sides. One end of the limit seat (64) is provided with a limit groove (641), and the other end is located below the roller (58) and is connected to the electromagnet (62). A limit block (65) is slidably connected in the limit groove (641). The limit block (65) is connected to the bottom of the limit groove (641) through a second spring (651). One end of the traction rope (61) is connected to the limit block (65), and the other end is connected to the piston rod of the pressing cylinder (14). The roller (58) is provided with an iron ring (66) that is attracted to the electromagnet (62).

2. The bar pressing device of the bar cutting machine according to claim 1, characterized in that: The first adjustment component (2) comprises a screw (21) and a screw sleeve (22), wherein the screw (21) is arranged on the side wall of the first base (11) and is parallel to the sliding direction of the second base (12), and the screw sleeve (22) is arranged on the side wall of the second base (12), the screw (21) passes through the screw sleeve (22) upward, and the screw (21) is threadedly connected to an adjustment nut (23) at both ends of the screw sleeve (22).

3. The bar pressing device of the bar cutting machine according to claim 1, characterized in that: The second adjustment component (3) includes an adjustment column (31), and the adjustment column (31) is provided with two groups. The number of the adjustment columns (31) in each group is two and they are parallel to each other. The two groups of adjustment columns (31) are respectively fixed at the two ends of the base block (15). The two clamping blocks (16) are respectively passed through the two groups of adjustment columns (31). The clamping blocks (16) are threadedly connected with a limiting screw (32) that abuts against the adjustment column (31). The limiting screw (32) corresponds one to one with the adjustment column (31).

4. The bar pressing device of the bar cutting machine according to claim 3, characterized in that: The regulating column (31) is provided with a limiting surface (311) that abuts against the limiting screw (32).

5. The bar pressing device of the bar cutting machine according to claim 3, characterized in that: Each of the limiting studs (32) is slidably connected to a shaft sleeve (33) that moves along its own axial direction, a gear ring (331) is fixed on the shaft sleeve (33), the gear ring (331) is rotatably connected to the clamping block (16), and the clamping block (16) is rotatably connected to a gear shaft (34) that meshes with its two corresponding gear rings (331), and a hexagonal groove (341) is provided on the gear shaft (34).

6. The bar pressing device of the bar cutting machine according to claim 1, characterized in that: The side wall of the vertical plate (63) is rotatably connected to a pulley (67) for the traction rope (61) to pass around.

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