Rotatable draw knife die with bend center

Abstract

The application discloses a rotatable material pressing cutter die of a bending center, which comprises a cutter seat provided with an axial vertical shaft hole, a rotating shaft arranged in the shaft hole of the cutter seat, the rotating shaft being capable of ascending and descending relative to the cutter seat and rotating around its own axis, the outer wall of the rotating shaft being provided with helical grooves extending upward and downward, a cutter head detachably connected to the bottom of the rotating shaft, a limiting pin rotatably connected with the cutter seat, the end of the limiting pin being embedded in the helical grooves and slidably matched with the helical grooves, a beam having a first end rotatably connected with the cutter seat through a support shaft and a lower pressing bearing connected with the first end through a round shaft, and a pressing block provided with an inclined edge abutting against the outer ring of the lower pressing bearing. The rotatable beam is adopted, the end of the beam drives the rotating shaft to ascend and descend through the rotation of the beam, the cutter head is linked to ascend and descend, the helical grooves on the cutter head are matched with the limiting pin, the cutter head can rotate when falling or ascending, and thus the inward bending edge can be avoided to prevent the inward bending edge from being damaged.

Description

Technical Field

[0001] This application relates to the field of bending machine technology, and in particular to a rotatable pressure die for a bending center. Background Technology

[0002] A bending machine is a machine for bending sheet metal. It includes a clamping mechanism for pressing the workpiece. The clamping mechanism includes an upper blade beam, an upper fixed blade connected to the lower end of the upper blade beam, a lower fixed blade located below the upper fixed blade and corresponding to the upper fixed blade, and a drive mechanism for driving the upper blade beam and the upper fixed blade to move up and down. The upper fixed blade moves downward to press the workpiece to be bent onto the lower fixed blade.

[0003] During the use of a bending machine, the following situation may occur: When bending a certain bend, due to the inward bending edge on the side of the workpiece, the bending edge will block the cutter head when the upper fixed cutter falls normally, causing the edge pressure plate die to be unable to press to the end of the bending line. Summary of the Invention

[0004] The purpose of this application is to provide a rotatable pressure die for bending center in order to solve the above problems. It adopts a rotating shaft that can rotate while lifting and lowering, and links the cutting head so that when the cutting head falls or rises, it can avoid the inward bending edge, so as to avoid damage to the inward bending edge.

[0005] This application achieves the above objectives through the following technical solutions:

[0006] A rotatable blank holder for bending center includes: a die holder with an axially perpendicular shaft hole;

[0007] The rotating shaft is set in the shaft hole of the tool holder. The rotating shaft can be raised and lowered relative to the tool holder and rotated around its own axis. The outer wall of the rotating shaft is provided with a spiral groove that extends vertically and vertically.

[0008] The cutter head is detachably connected to the bottom of the rotating shaft;

[0009] The limiting pin is rotatably connected to the tool holder, and the end of the limiting pin is embedded in the spiral groove and slides therewith;

[0010] The beam is rotatably connected to the tool holder in the middle via a support shaft, and the first end of the beam is connected to a pressure bearing via a round shaft.

[0011] The pressure block has a beveled edge, which abuts against the outer ring of the lower bearing bearing. The pressure block is connected to a linear drive device.

[0012] The fork arm is located at the second end of the beam;

[0013] Pin, the end of the pin is fixedly connected to the top of the rotating shaft;

[0014] The spring rod has its telescopic end hinged to the fork arm.

[0015] Furthermore, the helical angle of the spiral groove is 90° to 120° to achieve coupling between the lifting and lowering of the rotating shaft and the rotation angle.

[0016] Furthermore, the locating pin is rotatably connected to the tool holder via a locating pin bearing. The inner ring of the locating pin bearing is interference-fitted with the locating pin, and the outer ring is embedded in the circular groove on the side wall of the shaft hole.

[0017] Furthermore, the inclined surface of the pressure block slopes from top to bottom toward the side away from the supporting beam.

[0018] Furthermore, it also includes: a positioning block, fixed to the upper surface of the cutter head, and the cutter holder has a groove that matches the positioning block, used for locking and positioning when the cutter head is raised.

[0019] Furthermore, it also includes a gasket, which is fitted onto the pin.

[0020] Furthermore, the linear drive device is an electric push rod, cylinder, or lead screw slide, and the output end of the linear drive device is connected to the pressure block.

[0021] Compared to existing technologies, this application uses a rotatable support beam. The rotation of the support beam causes the end of the beam to drive the rotating shaft to rise and fall, which in turn causes the cutter head to rise and fall. The spiral groove on the cutter head cooperates with the limiting pin, so that the cutter head can rotate when it falls or rises, thereby avoiding the inward bending edge and preventing damage to the inward bending edge. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the present application and form part of the specification. They are used together with the following detailed description to explain the present application, but do not constitute a limitation thereof. In the drawings:

[0023] Figure 1 This is a schematic diagram of the structure of this application;

[0024] Figure 2 This is a schematic diagram of the internal cross-sectional structure of the tool holder in this application;

[0025] Figure 3 This is a schematic diagram of the cross-sectional structure of the shaft hole in this application;

[0026] Figure 4 This is a schematic diagram of the beam structure of this application;

[0027] Figure 5 This is a schematic diagram of the rotating shaft structure of this application.

[0028] The annotations in the attached figures are explained as follows:

[0029] 1. Tool holder; 2. Tool head; 3. Rotary shaft; 4. Spiral groove; 5. Pressure block; 6. Bevel; 7. Support beam; 8. Lower pressure bearing; 9. Spring rod; 10. Support shaft; 11. Shim; 12. Fork arm; 13. Limit pin; 14. Limit pin bearing; 15. Positioning block; 16. Shaft hole; 17. Pin; 22. Side. Detailed Implementation

[0030] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0031] In the description of this application, it should be understood that the terms "upper," "lower," "front," "back," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 This description is provided for the convenience of describing this application and for the purpose of simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0032] like Figure 1-2 As shown, a rotatable pressure die for bending center includes: a die holder 1 with an axially perpendicular shaft hole 16;

[0033] The rotating shaft 3 is set in the shaft hole 16 of the tool holder 1. The rotating shaft 3 can be raised and lowered relative to the tool holder 1 and rotated around its own axis. The outer wall of the rotating shaft 3 is provided with a spiral groove 4 that extends vertically and vertically.

[0034] The cutter head 2 is detachably connected to the bottom of the rotating shaft 3;

[0035] The limiting pin 13 is rotatably connected to the tool holder 1, and the end of the limiting pin 13 is embedded in the spiral groove 4 and slides therewith;

[0036] The supporting beam 7 is rotatably connected to the tool holder 1 via a support shaft 10 in the middle, and the first end of the supporting beam 7 is connected to a pressure bearing 8 via a round shaft.

[0037] The pressure block 5 is provided with a sloping side 6, which abuts against the outer ring of the lower pressure bearing 8. The pressure block 5 is connected to a linear drive device.

[0038] The fork arm 12 is located at the second end of the supporting beam 7, with the second end opposite to the first end;

[0039] Pin 17, the end of pin 17 is fixedly connected to the top of rotating shaft 3;

[0040] The spring rod 9 has its telescopic end hinged to the fork arm 12, and its fixed part connected to the knife holder 1.

[0041] Furthermore, the spiral angle of the spiral groove 4 is 90° to 120° to achieve coupling between the lifting and rotating angles of the rotating shaft 3.

[0042] Furthermore, the limiting pin 13 is rotatably connected to the tool holder 1 through the limiting pin bearing 14. The inner ring of the limiting pin bearing 14 is interference-fitted with the limiting pin 13, and the outer ring is embedded in the circular groove on the side wall of the shaft hole 16.

[0043] Specifically, the shaft hole 16 passes through the top and bottom of the tool holder 1 for installation or maintenance. The side wall of the shaft hole 16 is provided with a circular groove for installing the limit pin bearing 14, so that the limit pin bearing 14 can be fastened in the circular groove, so that the limit pin bearing 14 can support the rotation of the limit pin 13 through the inner ring.

[0044] Furthermore, the inclined surface of the inclined side 6 of the pressure block 5 slopes from top to bottom toward the side away from the supporting beam 7.

[0045] Furthermore, it also includes: a positioning block 15, fixed to the upper surface of the cutter head 2, and a groove adapted to the positioning block 15 for locking and positioning when the cutter head 2 is raised.

[0046] Furthermore, it also includes a gasket 11, which is fitted onto the pin 17.

[0047] Furthermore, the linear drive device is an electric push rod, cylinder, or lead screw slide, and the output end of the linear drive device is connected to the pressure block 5. The linear drive device is existing technology.

[0048] Specifically, the linear drive device can drive the pressure block 5 to move. The top of the cutter holder 1 can be mounted on the cutter beam at the bending center so that it can be driven by the bending machine to follow the rise and fall of the cutter beam. The cutter head 2 can be fastened to the rotating shaft 3 by screwing it in radially along the rotating shaft 3 using fasteners such as bolts, and can be disassembled for subsequent maintenance. The support shaft 10 supports the rotation of the support beam 7 by rotating it with the cutter holder 1. The support beam 7 and the fork arm 12 are integrated to increase structural strength. The inclined surface of the inclined side 6 of the pressure block 5 is inclined from top to bottom toward the side away from the support beam 7 so that when the pressure block 5 moves toward the support beam 7, the inclined surface 6... The inclined plane can press down on the bearing 8. The inclined angle of the inclined side 6 is 15 degrees to 35 degrees. At the same time, it rubs against the bearing 8. The bearing 8 can rotate to reduce friction. The shaft of the pin 17 is fixedly connected to the rotating shaft 3. The shim 11 is sleeved on the end near the large head of the pin 17 so that the fork arm 12 contacts the shim 11 when it is raised, reducing the wear of the pin 17. When the upper surface of the cutter head 2 is raised and fits against the cutter seat 1, it is locked into the groove to position the cutter head 2. The telescopic part of the spring rod 9 is connected to the support beam 7. The fixed part of the spring rod 9 is connected to the cutter seat 1 and can be pulled away from the support beam 7.

[0049] In the above structure: the rotating shaft 3 in the attached diagram is in a raised state. At this time, the cutter head 2 is engaged with the cutter holder 1. Through the linear drive device, the pressure block 5 is driven away from the support beam 7. At this time, the spring rod 9 pulls the support beam 7 with elastic force, causing the support beam 7 to rotate, so that the end of the support beam 7 close to the pressure block 5 is raised. Then, the rotating shaft 3 is pressed down by the fork arm 12, causing the rotating shaft 3 to descend. At the same time, one end of the limiting pin 13 can slide along the spiral groove 4, and the limiting pin 13 can reduce friction by bearing the bearing rotation of the bearing 14. When the position of the limiting pin 13 is fixed, the spiral groove 4 can slide along the limiting pin 13. The action of rotation allows for simultaneous descent and angle adjustment. A linear drive mechanism moves the pressure block 5 closer to the support beam 7. The inclined edge 6 on the pressure block 5 contacts the downward bearing 8 on the support beam 7, causing the inclined edge 6 to press down on the bearing 8, thus lowering the end of the support beam 7. The support beam 7 can rotate under the support of the support shaft 10. Then, the limiting pin 13 raises the rotating shaft 3. The spiral groove 4 can rotate under the action of the limiting pin 13, thus allowing for simultaneous descent and angle adjustment. The rotation of the rotating shaft 3 during both descent and ascent creates an angle or parallel relationship between the cutter head 2 and the bending edge.

[0050] The foregoing has shown and described the basic principles, main features, and advantages of this application. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this application. Various changes and modifications can be made to this application without departing from the spirit and scope thereof, and all such changes and modifications fall within the scope of this application as claimed. The scope of protection of this application is defined by the appended claims and their equivalents.

Claims

1. A rotatable blanking die with a bending center, characterized in that, include: The tool holder (1) is provided with an axially perpendicular shaft hole (16). The rotating shaft (3) is located in the shaft hole (16) of the tool holder (1). The rotating shaft (3) can be raised and lowered relative to the tool holder (1) and rotated around its own axis. The outer wall of the rotating shaft (3) is provided with a spiral groove (4) extending vertically. The cutter head (2) is detachably connected to the bottom of the rotating shaft (3); The limiting pin (13) is rotatably connected to the tool holder (1), and the end of the limiting pin (13) is embedded in the spiral groove (4) and slides therewith; The beam (7) is rotatably connected to the tool holder (1) in the middle via a support shaft (10), and the first end of the beam (7) is connected to a pressure bearing (8) via a round shaft. The pressure block (5) has a bevel (6), which abuts against the outer ring of the lower bearing (8). The pressure block (5) is connected to a linear drive device. The fork arm (12) is located at the second end of the supporting beam (7); Pin (17), the end of pin (17) is fixedly connected to the top of rotating shaft (3); The spring rod (9) has its telescopic end hinged to the fork arm (12).

2. The rotatable blank holder die for bending center according to claim 1, characterized in that: The spiral angle of the spiral groove (4) is 90° to 120° to achieve the coupling of the lifting and rotating angle of the rotating shaft (3).

3. The rotatable blank holder die for bending center according to claim 1, characterized in that: The limiting pin (13) is rotatably connected to the tool holder (1) through the limiting pin bearing (14). The inner ring of the limiting pin bearing (14) is interference-fitted with the limiting pin (13), and the outer ring is embedded in the circular groove of the side wall of the shaft hole (16).

4. The rotatable blank holder die for bending center according to claim 1, characterized in that: The inclined surface of the inclined side (6) of the pressure block (5) slopes from top to bottom toward the side away from the supporting beam (7).

5. A rotatable blank holder for bending centers according to claim 1, characterized in that: Also includes: The positioning block (15) is fixed on the upper surface of the cutter head (2). The cutter holder (1) is provided with a groove that matches the positioning block (15) for locking and positioning when the cutter head (2) is raised.

6. A rotatable blank holder for bending centers according to claim 1, characterized in that: It also includes a gasket (11) fitted onto the pin (17).

7. A rotatable blank holder for bending centers according to claim 1, characterized in that: The linear drive device is an electric push rod, cylinder or lead screw slide, and the output end of the linear drive device is connected to the pressure block (5).

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