A sheet metal bending device

Abstract

A sheet bending device, comprising a base, a pressing seat, a tool head, a movable seat, a first driving unit, and a second driving unit; a supporting plane is provided on the base; the pressing seat can move up and down relative to the base driven by the first driving unit, and a pressing plane is formed at the bottom of the pressing seat. The pressing plane and the supporting plane cooperate to form a clamping mechanism. The side of the pressing seat facing the tool head is an upper supporting inclined plane, and the bottom end of the upper supporting inclined plane is connected to one end of the pressing plane facing the tool head; the movable seat can move up and down relative to the base driven by the second driving unit; the tool head is installed on the movable seat and can move relative to the movable seat in the length direction of the base. A pressing portion for pushing the sheet is provided on the side of the tool head facing the pressing seat; wherein, a top block is further provided on the base, and a guiding portion cooperating with the top block is provided on the tool head. The present invention improves the efficiency of sheet bending and reduces the equipment cost of the sheet bending device.

Description

Technical Field

[0001] The present invention relates to the technical field of metal processing, and particularly relates to a sheet bending device. Background Art

[0002] During the processing of metal sheets, it is usually necessary to use a bending device to bend the metal sheets. The existing bending devices usually use a bending tool head to move downward and press against the metal sheet placed on the lower die, causing the metal sheet to be bent under pressure. Since the metal sheet has a certain amount of springback after being pressed by the tool head, for example, when the required bending angle reaches 90°, it is necessary to press the sheet multiple times with the tool head and adjust the bending angle multiple times to finally make the bending angle of the metal sheet reach 90°. The adjustment process is relatively cumbersome, and different tool heads need to cooperate with the lower die to achieve a 90° bend of the metal sheet, resulting in low bending efficiency of the metal sheet and the need to use multiple sets of tool heads and lower dies, leading to high equipment costs. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a sheet bending device that can use a single tool head to achieve the required bending angle of the metal sheet through a single bending action, improve the bending efficiency of the metal sheet, and reduce equipment costs.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A sheet bending device includes a base, a pressing seat, a tool head, a movable seat, a first driving unit, and a second driving unit;

[0006] A support plane is provided on the base;

[0007] The pressing seat is installed on the base and can move up and down relative to the base under the drive of the first driving unit. A pressing plane is formed at the bottom of the pressing seat. The pressing plane and the support plane cooperate to form a clamping mechanism for clamping the sheet. The side of the pressing seat facing the tool head is an upper support inclined plane, which gradually inclines away from the tool head from bottom to top, and the bottom end of the upper support inclined plane is connected to one end of the pressing plane facing the tool head;

[0008] The movable seat is installed on the base and can move up and down relative to the base under the drive of the second driving unit;

[0009] The tool head is installed on the movable seat and can move relative to the movable seat in the length direction of the base. A pressing portion for pushing the sheet is provided on the side of the tool head facing the pressing seat;

[0010] Wherein, a top block is further arranged on the base, and a guiding part matched with the top block is arranged on the tool head. The guiding part is matched with the top block and is used for pushing the tool head towards the direction close to the pressing seat when the movable seat moves upwards or downwards.

[0011] The pressing part extends from the top of the side of the tool head facing the pressing seat towards the direction close to the pressing seat, and a avoiding concave position for avoiding the pressing seat is formed on the part of the tool head below the pressing part.

[0012] One end of the supporting plane close to the tool head extends directly below the connection of the upper supporting inclined plane and the pressing plane.

[0013] A guiding column extending along the length direction of the base is fixed on the tool head. The guiding column is movably inserted through the movable seat. The guiding part is a first guiding inclined plane arranged at the end of the guiding column far from the tool head. The first guiding inclined plane gradually inclines towards the direction far from the tool head from top to bottom, and the top block abuts against the first guiding inclined plane.

[0014] A second guiding inclined plane fitted with the first guiding inclined plane is arranged on the top block.

[0015] An elastic element is further arranged between the tool head and the movable seat. The elastic element is used for providing an elastic stress that enables the tool head to move relative to the movable seat towards the direction far from the pressing seat.

[0016] A guiding rod extending along the length direction of the base is fixed on the tool head. The guiding rod is movably inserted through the movable seat, and a limiting flange is arranged at the end of the guiding rod far from the tool head. The elastic element is a spring sleeved on the guiding rod, and the two ends of the spring respectively abut against the movable seat and the limiting flange.

[0017] Two tool heads are installed on the movable seat, and the two tool heads are arranged vertically opposite to each other. A lower supporting inclined plane is arranged on the base. The lower supporting inclined plane gradually inclines towards the direction far from the tool head from top to bottom, and the top end of the lower supporting inclined plane is connected to one end of the supporting plane close to the tool head.

[0018] The bending device further includes a base, two pressing seats are arranged on the base, at least one of the two pressing seats is movably installed on the base, and a driving component for driving the at least one pressing seat to move along the length direction of the base is further arranged on the base.

[0019] The beneficial effects of the present invention are as follows:

[0020] By adjusting the rising height of the movable seat, the present invention can control the angle of the sheet metal being transitionally bent. After the cutting head returns to its original position, the sheet metal rebounds, making the bending angle of the sheet metal exactly the same as the required angle. Compared with the prior art, the present invention only needs to adjust the rising height of the movable seat to adjust the bending angle of the sheet metal, and only needs to complete the bending of the sheet metal through one bending action, improving the efficiency of sheet metal bending. There is no need to replace the cutting head and the mold, reducing the equipment cost of the sheet metal bending device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of Embodiment 1 of the present invention;

[0022] Figure 2 is Figure 1 the view in the C direction of;

[0023] Figure 3 is Figure 2 the enlarged view of part A in, and describes Figure 1 a working state of the bending device shown;

[0024] Figure 4 is Figure 1 another working state of the bending device shown;

[0025] Figure 5 is Figure 1 yet another working state of the bending device shown;

[0026] Figure 6a is Figure 2 the enlarged view of part B in;

[0027] Figure 6b is Figure 6a the schematic diagram of the cooperation between the cutting head and the top block in;

[0028] Figure 7 is a schematic structural diagram of Embodiment 2 of the present invention;

[0029] Figure 8 is a schematic structural diagram of Embodiment 3 of the present invention;

[0030] Figure 9 is a schematic structural diagram of Embodiment 4 of the present invention;

[0031] Figure 10 is Figure 9 the view in the D direction of;

[0032] Figure 11 is Figure 10 the enlarged view of part E in;

[0033] Figure 12 is a schematic structural diagram of Embodiment 5 of the present invention;

[0034] Figure 13 It is a schematic structural diagram of Embodiment 6 of the present invention;

[0035] Figure 14 It is a schematic structural diagram of Embodiment 7 of the present invention;

[0036] Figure 15 It is a schematic structural diagram of Embodiment 8 of the present invention. Specific Embodiments

[0037] Next, in combination with the accompanying drawings and specific embodiments, the present invention will be further described:

[0038] Figure 1 、 2, 3, 4, 5, and 6 show the sheet bending device of the first embodiment of the present invention, which includes a base 10, a pressing seat 20, a tool head 50, a movable seat 40, a first driving unit, and a second driving unit. Among them, the base 10 serves as the installation base part, and it cooperates with the pressing seat 20 to position and clamp the sheet 90. Specifically, a supporting plane 101 is provided on the base 10. The pressing seat 20 is located above the base 10 and can move relative to the base 10 along the height direction of the base 10 (i.e., the Z direction in the figure) driven by the first driving unit. And a pressing plane 201 is formed at the bottom of the pressing seat 20, and this pressing plane 201 is located above the supporting plane 101. The pressing seat 20 extends along the width direction of the base 10 (i.e., the Y direction in the figure). When bending the sheet 90, the first driving unit is used to drive the pressing seat 20 to move downward, so that the pressing plane 201 and the supporting plane 101 form a clamping mechanism to clamp the sheet between the pressing plane 201 and the supporting plane 101. The pressing seat 20 is located at the rear side of the tool head 50. And on the side of the pressing seat 20 facing the tool head 50 is an upper supporting inclined plane 202, and this upper supporting inclined plane 202 gradually inclines away from the tool head 50 from bottom to top, and the bottom of the upper supporting inclined plane 202 is connected to one end of the pressing plane 201 facing the tool head 50. That is to say, the included angle between the upper supporting inclined plane 202 and the pressing plane 201 is less than 90 degrees. In this embodiment, the included angle between the upper supporting inclined plane 202 and the pressing plane 201 is set to 45°. The movable seat 40 is installed on the base 10, and the second driving unit is used to drive the movable seat 40 to move up and down along the Z direction. The tool head 50 is installed on the movable seat 40 and is slidably matched with the movable seat 40, and can move relative to the movable seat 40 in the length direction of the base 10 (i.e., the X direction in the figure). And a pressing part 51 is provided on the side of the tool head 50 facing the pressing seat 20. When bending the sheet 90, this pressing part 51 is used to push the sheet 90 so that the sheet 90 is bent at the position where the pressing plane 201 is connected to the upper supporting inclined plane 202. In addition, a top block 14 is also provided on the base 10, and a guiding part cooperating with the top block 14 is provided on the tool head 50. When the second driving unit drives the movable seat 40 to move upward, the top block 14 pushes the guiding part, which can make the tool head 50 move along the X direction towards the direction close to the pressing seat 20. In this way, while the tool head 50 has a Z-direction displacement along with the movable seat 40, it can move along the X direction.

[0039] See Figure 4As shown, the sheet 90 is clamped between the upper support plane 101 and the pressing plane 201 to position the position of the sheet to be bent, that is, the portion of the sheet to be bent protrudes from one end of the pressing plane 201 close to the cutter head 50. At this time, the second driving unit is started, and the cutter head 50 moves upward along the Z direction with the movable seat 40. The top block 14 is in contact with the guiding portion. The cutter head 50 moves upward in a straight line, and the pressing portion 51 pushes the portion of the sheet 90 to be bent upward. After the sheet 90 is bent to form a 90° bending angle, refer to Figure 3 As shown, the top block 14 is in contact with the guiding portion. Since the cutter head 50 continues to move upward with the movable seat 40, under the pushing of the top block 14, while the cutter head 50 moves upward, it moves toward the pressing seat 20 along the X direction. The pressing portion 51 presses the bent portion 91 of the sheet 90 after being bent by 90° upward against the upper support inclined plane 202, so that the bent portion 91 of the sheet 90 is transitionally bent. By adjusting the rising height of the movable seat 40, the present invention can control the angle of the transitional bending of the sheet 90. After the cutter head 50 returns to its position, the sheet 90 rebounds, so that the bending angle of the sheet 90 is exactly the same as the required angle. Compared with the prior art, the present invention only needs to adjust the rising height of the movable seat 40 to adjust the bending angle of the sheet, and only needs to complete the bending of the sheet through one bending action, improving the efficiency of sheet bending, and does not need to replace the cutter head and the mold, reducing the equipment cost of the sheet bending device.

[0040] The bending device of the present invention can not only Figure 3 , 4 As shown, bend the sheet by 90°, but it can also bend the sheet at an angle greater than 90°. When bending at an angle greater than 90°, the steps are the same as above. When bending at an angle less than 90°, on the basis of the state shown in Figure 3 After the pressing seat 20 is moved upward, the pressing seat 20 is placed above the bent portion of the sheet 90, and then the pressing seat 20 is moved downward. In this way, the pressing seat 20 and the base 10 respectively squeeze both sides of the bent portion of the sheet 90. By adjusting the distance that the pressing seat 20 moves downward, a bending angle less than 90° can be formed at the bent portion of the sheet.

[0041] In the present invention, the main body portion of the cutter head 50 is slidably mounted on the movable seat 40. The pressing portion 51 is formed by extending from the top of the side of the main body portion of the cutter head 50 facing the pressing seat 20 towards the pressing seat 20. And, a relief recess 501 is formed in the portion of the cutter head 50 below the pressing portion 51, that is to say, the portion of the side of the cutter head 50 facing the pressing seat 20 below the pressing portion 51 is provided with a hollow structure. In this way, when the pressing portion 51 presses the sheet 90 to cause the sheet 90 to be transitionally bent, the pressing portion 51 can be located above the upper support inclined surface 202, and the relief recess 501 is used to avoid the pressing seat 20, preventing interference between the pressing seat 20 and the cutter head 50. In addition, one end of the support plane 101 close to the cutter head 50 is located directly below the junction of the upper support inclined surface 202 and the pressing plane 201, enabling the support plane 101 and the pressing plane 201 to fully press the other parts of the sheet 90 except the bent portion 91, avoiding deformation of other parts of the sheet 90.

[0042] In a preferred embodiment, a guide post 52 extending along the X direction is fixed on the cutter head 50. The guide post 52 is movably inserted through the movable seat 40. The cutter head 50 is guided by the guide post 52 to enable the cutter head 50 to move along the X direction. The guiding portion is a first guiding inclined surface 521 provided at one end of the guide post 52 away from the cutter head 50. The first guiding inclined surface 521 is inclined downward gradually in a direction away from the cutter head 50. The top block 14 abuts against the first guiding inclined surface 521. Thus, when the movable seat 40 moves upward, through the cooperation of the first guiding inclined surface 521 and the top block 14, the cutter head 50 is reversed, so that it can move towards the pressing seat 20. Further, a second guiding inclined surface 103 is provided on the top block 14, and the second guiding inclined surface 103 fits on the first guiding inclined surface 521. Of course, the reversal of the cutter head 50 can also be achieved by other reversing mechanisms, such as through an inclined guiding groove and a guiding pin inserted in the guiding groove to achieve the reversal of the cutter head 50.

[0043] An elastic element is further provided between the cutter head 50 and the movable seat 40. The elastic element is used to provide an elastic stress, and the elastic stress is used to make the cutter head 50 move relative to the movable seat 40 in a direction away from the pressing seat 20, so that the cutter head 50 can reset after completing the sheet bending action. Specifically, the elastic element is a spring 60. A guide rod 53 extending along the X direction is fixed on the cutter head 50. The guide rod 53 is inserted through the movable seat 40, and a radially outward protruding limiting flange 531 is provided at one end of the guide rod 53 away from the cutter head 50. The above-mentioned spring 60 is sleeved on the guide rod 53. One end of the spring 60 abuts against the limiting flange 531 and the other end abuts against the movable seat 40. In other embodiments, the elastic element can also be a tension spring, which is connected between the base 10 and the cutter head 50 to generate an elastic pulling force to enable the cutter head 50 to reset.

[0044] The above-mentioned first driving unit includes a first motor 30, a first transmission lead screw, and a first lead screw nut. A bracket 11 is installed on the base 10. The body of the motor 30 is fixed to the top of the bracket 11. The first transmission lead screw extends downward and is connected to the rotating shaft of the first motor 30. The first lead screw nut is sleeved on the first transmission lead screw and fixedly connected to the pressing seat 20. A linear guide rail 12 extending in the Z direction is provided on the bracket 11. A slider 21 is fixedly connected to the pressing seat 20. The slider 21 is slidably installed on the linear guide rail 12. The first motor 30, the first transmission lead screw, and the first lead screw nut are arranged at one end of the pressing seat 20, so that the pressing seat 20 forms a single-cantilever structure that can move up and down. After the first motor 30 is started, the pressing seat 20 can be driven to move up and down.

[0045] The second driving unit includes a second motor 70, a second transmission lead screw, and a second lead screw nut. The body of the second motor 70 is fixed to the base 10. The second transmission lead screw extends downward and is connected to the rotating shaft of the second motor 70. The second lead screw nut is sleeved on the second transmission lead screw and fixedly connected to the movable seat 40. A linear guide rail 13 extending in the Z direction is further provided on the base 10. A slider 41 that is slidably engaged with the linear guide rail 13 is fixed to the movable seat 40. When the second motor 70 is started, the movable seat 40 can be driven to move up and down.

[0046] In fact, both the first driving unit and the second driving unit can adopt other driving mechanisms, such as oil cylinders, air cylinders, etc. In the preferred embodiment of the present invention, the second driving unit adopts the above-mentioned lead screw transmission mechanism, which can accurately adjust the displacement of the tool head 50.

[0047] Figure 7 It is a schematic diagram of a sheet metal bending device according to the second embodiment of the present invention, which includes two bases 10 and a base 100. A pressing seat, a movable seat, and a tool head are arranged on each base 10. One of the bases 10 is fixed to the end of the base 100, and the other base 10 is movably installed on the base 100 and can move under the drive of the drive assembly 110, so that the two bases 10 approach or separate from each other. In this way, it is suitable for bending two positions of the sheet metal. By driving the other base 10 to move through the drive assembly 110, the distance between the two bases 10 can be adjusted, so as to adjust the distance between the two parts to be bent on the sheet metal. The drive assembly 110 can be a lead screw transmission mechanism driven by a motor. In Figure 8 In the sheet metal bending device according to the third embodiment shown in

[0048] As in Figure 9 、10 As shown in FIGS. 11, the sheet bending device according to the fourth embodiment of the present invention has two cutting heads 50 mounted on the movable seat 40. The two cutting heads 50 are arranged vertically opposite to each other. A lower support slope 102 is provided on the base 10. The lower support slope gradually inclines away from the cutting head 50 from top to bottom, and the top end of the lower support slope 102 is connected to one end of the support plane 101 close to the cutting head 50. The sheet is clamped by the pressing plane 201 and the support plane 102 on the pressing seat 20. When the upper cutting head 50 moves downward, it bends the sheet downward. The upper cutting head 50 is pushed by the top slope of the top block 15 and generates a displacement towards the pressing seat 20 to perform a transitional bending of the sheet. When the lower cutting head 50 moves upward, it bends the sheet upward, and at the same time, it is pushed by the bottom slope of the top block 15 and generates a displacement towards the pressing seat 20 to perform a transitional bending of the sheet. Thus, through this bending device, the sheet can be bent from top to bottom or from bottom to top.

[0049] As Figure 12 shown, in the fifth embodiment of the present invention, on the basis of the fourth embodiment above, a base and two bases are provided. One of the bases is movably mounted on the base, and a driving component is used to drive the movable base to move on the base to adjust the distance between the two bases, thereby changing the distance between the two bent parts of the sheet.

[0050] As Figure 13 shown, in the sixth embodiment of the present invention, on the basis of the fifth embodiment above, both bases are movably mounted on the base, and two driving components are provided on the base. The two driving components respectively drive the two bases to move along the length direction of the base.

[0051] As Figure 14 shown, the seventh embodiment of the present invention is based on the structure shown in FIGS. Figure 1 and 2 . On both sides of the base in the width direction, a bracket is respectively provided. Both ends of the pressing seat are slidably mounted on the two brackets, and a first driving unit is respectively provided on the two brackets.

[0052] As Figure 15 shown, the eighth embodiment of the present invention is based on the structure shown in FIGS. Figure 9 and 10 . On both sides of the base in the width direction, a bracket is respectively provided. Both ends of the pressing seat are slidably mounted on the two brackets, and a first driving unit is respectively provided on the two brackets.

[0053] The above are only the preferred embodiments of the present invention, which are further detailed descriptions of the present invention in combination with specific preferred implementation manners. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A sheet metal bending device, characterized in that, It includes a base, a pressing seat, a cutter head, a movable seat, a first driving unit, and a second driving unit; A supporting plane is provided on the base; The pressing seat is mounted on the base and can move up and down relative to the base driven by the first driving unit. A pressing plane is formed at the bottom of the pressing seat. The pressing plane and the supporting plane cooperate to form a clamping mechanism for clamping a plate. The side of the pressing seat facing the cutter head is an upper supporting inclined plane, which gradually inclines away from the cutter head from bottom to top, and the bottom end of the upper supporting inclined plane is connected to one end of the pressing plane facing the cutter head; The movable seat is mounted on the base and can move up and down relative to the base driven by the second driving unit; The cutter head is mounted on the movable seat and can move relative to the movable seat in the length direction of the base. A pressing portion for pushing the plate is provided on the side of the cutter head facing the pressing seat; Wherein, a top block is further provided on the base, and a guiding portion cooperating with the top block is provided on the cutter head. The guiding portion and the top block cooperate to push the cutter head towards the direction close to the pressing seat when the movable seat moves up or down.

2. The sheet metal bending device according to claim 1, characterized in that, The pressing portion extends from the top of the side of the cutter head facing the pressing seat towards the direction close to the pressing seat, and a avoiding concave position for avoiding the pressing seat is formed on the part of the cutter head below the pressing portion.

3. The sheet metal bending device according to claim 1, characterized in that, One end of the supporting plane close to the cutter head extends to directly below the connection of the upper supporting inclined plane and the pressing plane.

4. The sheet metal bending device according to claim 1, characterized in that, A guiding column extending along the length direction of the base is fixed on the cutter head. The guiding column is movably inserted through the movable seat. The guiding portion is a first guiding inclined plane provided at the end of the guiding column away from the cutter head. The first guiding inclined plane gradually inclines away from the cutter head from top to bottom, and the top block abuts against the first guiding inclined plane.

5. The sheet metal bending device according to claim 4, characterized in that, A second guiding inclined plane fitting the first guiding inclined plane is provided on the top block.

6. The sheet metal bending device according to claim 1, characterized in that, An elastic element is further provided between the cutter head and the movable seat. The elastic element is used to provide an elastic stress for moving the cutter head relative to the movable seat in the direction away from the pressing seat.

7. The sheet metal bending device according to claim 6, characterized in that, A guiding rod extending along the length direction of the base is fixed on the cutter head. The guiding rod is movably inserted through the movable seat, and a limiting flange is provided at the end of the guiding rod away from the cutter head. The elastic element is a spring sleeved on the guiding rod, and the two ends of the spring respectively abut against the movable seat and the limiting flange.

8. The sheet metal bending device according to claim 1, characterized in that, Two cutter heads are mounted on the movable seat and are arranged up and down relatively. A lower supporting inclined plane is provided on the base. The lower supporting inclined plane gradually inclines away from the cutter head from top to bottom, and the top end of the lower supporting inclined plane is connected to one end of the supporting plane close to the cutter head.

9. The sheet metal bending device according to claim 1, characterized in that, The bending device further includes a base. Two pressing seats are provided on the base. At least one of the two pressing seats is movably mounted on the base, and a driving component for driving the at least one pressing seat to move along the length direction of the base is further provided on the base.

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