Rotatable material pressing cutting die of bending center

Abstract

The invention discloses a rotatable material pressing cutting die of a bending center, which comprises a tool apron, a cutter head, a pressing plate, a pressing plate and a pressing plate, and is characterized in that the tool apron is provided with an axially vertical shaft hole; the rotating shaft is arranged in the shaft hole of the tool apron, the rotating shaft can ascend and descend relative to the tool apron and rotate around the axial direction of the rotating shaft, and a spiral groove spirally extending up and down is formed in the outer wall of the rotating shaft; the tool bit is detachably connected to the bottom of the rotating shaft; the limiting pin is rotationally connected with the tool apron, and the end part of the limiting pin is embedded into the spiral groove and is in sliding fit with the spiral groove; the middle of the bearing beam is rotationally connected with the tool apron through a fulcrum shaft, and the first end of the bearing beam is connected with a downward-pressing bearing through a circular shaft; the pressing block is provided with a bevel edge which abuts against the outer ring of the downward-pressing load-bearing bearing. The rotatable bearing beam is adopted, through rotation of the bearing beam, the end of the bearing beam drives the rotating shaft to ascend and descend, the tool bit is linked to ascend and descend, the spiral groove in the tool bit is matched with the limiting pin, the tool bit can rotate when falling or ascending, and therefore the inward bent edge can be avoided, and damage to the inward bent edge is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of bending machines, and in particular to a rotatable pressing die for a bending center. Background Art

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

[0003] During the use of the bending machine, the following situation will be encountered: 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 knife 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 pressing knife die for the bending center in order to solve the above problems. It adopts a rotating shaft that can rotate while rising and falling, and links the cutter head so that when the cutter head falls or rises, it can avoid the inward bending edge to avoid damaging the inward bending edge.

[0005] This application achieves the above objectives through the following technical solutions: A rotatable material pressing knife die for a bending center comprises: a knife seat provided with an axially vertical shaft hole; The rotating shaft is arranged in the shaft hole of the tool holder, and 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 extending spirally up and down; The cutter head is detachably connected to the bottom of the rotating shaft; A limit pin is rotatably connected to the tool holder, and an end of the limit pin is embedded in the spiral groove and slidably engaged therewith; The middle part of the beam is rotatably connected to the knife seat through a support shaft, and the first end of the beam is connected to a downward pressure bearing bearing through a circular shaft; A pressing block is provided with a beveled edge, the beveled edge abuts against the outer ring of the downward pressure bearing, and the pressing block is connected to a linear drive device; a fork arm, provided at the second end of the beam; A pin, the end of which is fixedly connected to the top of the rotating shaft; A spring rod, the telescopic end of which is hinged to the fork arm.

[0006] Furthermore, the spiral angle of the spiral groove is 90° to 120°, so as to achieve the coupling between the lifting and lowering of the rotating shaft and the rotation angle.

[0007] Furthermore, the limit pin is rotatably connected to the tool holder through a limit pin bearing bearing, the inner ring of the limit pin bearing bearing is interference fit with the limit pin, and the outer ring is embedded in the circular groove of the side wall of the shaft hole.

[0008] Furthermore, the oblique side and inclined surface of the pressing block are inclined from top to bottom toward the side away from the shoulder beam.

[0009] Furthermore, it also includes: a positioning block fixed on the upper surface of the cutter head, and the cutter seat is provided with a groove adapted to the positioning block for clamping and positioning when the cutter head is lifted.

[0010] Furthermore, it also includes a gasket, which is sleeved on the pin shaft.

[0011] Furthermore, the linear drive device is an electric push rod, a cylinder or a screw slide, and the output end of the linear drive device is connected to the pressure block.

[0012] Compared with the existing technology, the present application adopts a rotatable carrying beam. Through the rotation of the carrying beam, its end drives the rotating shaft to rise and fall, and the cutter head is linked to rise and fall. The spiral groove on the cutter head cooperates with the limit pin, so that the cutter head can rotate when falling or rising, thereby avoiding the inward bending edge to avoid damage to the inward bending edge. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the following detailed description, they are used to explain the present application but do not constitute a limitation of the present application. In the accompanying drawings: Figure 1 It is a schematic diagram of the structure of this application; Figure 2 It is a schematic diagram of the internal cross-sectional structure of the knife holder in this application; Figure 3 It is a schematic diagram of the cross-sectional structure of the shaft hole of the present application; Figure 4 It is a schematic diagram of the beam structure of this application; Figure 5 It is a schematic diagram of the rotating shaft structure of this application.

[0014] The following are the descriptions of the reference numerals: 1. Tool holder; 2. Tool head; 3. Rotating axis; 4. Spiral groove; 5. Pressure block; 6. Bevel; 7. Bearing beam; 8. Downward pressure bearing; 9. Spring rod; 10. Support shaft; 11. Gasket; 12. Fork arm; 13. Limit pin; 14. Limit pin bearing; 15. Positioning block; 16. Shaft hole; 17. Pin; 22. Side. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0016] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1 , and is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting this application.

[0017] like Figure 1-2 As shown, a rotatable material pressing knife die for a bending center comprises: a knife seat 1, provided with an axially vertical shaft hole 16; The rotating shaft 3 is disposed 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 spirally up and down. The cutter head 2 is detachably connected to the bottom of the rotating shaft 3; The limit pin 13 is rotatably connected to the tool holder 1, and the end of the limit pin 13 is embedded in the spiral groove 4 and slides with it; The middle part of the beam 7 is rotatably connected to the tool holder 1 through a support shaft 10, and the first end of the beam 7 is connected to a downward pressure bearing bearing 8 through a circular shaft; The pressing block 5 is provided with a bevel 6, which abuts against the outer ring of the downward pressure bearing 8, and the pressing block 5 is connected to a linear drive device; a fork arm 12, provided at a second end of the shoulder beam 7, the second end being opposite to the first end; A pin 17, the end of which is fixedly connected to the top of the rotating shaft 3; The spring rod 9 has a telescopic end hinged to the fork arm 12 and a fixed portion connected to the knife seat 1 .

[0018] Furthermore, the spiral angle of the spiral groove 4 is 90° to 120°, so as to achieve the coupling between the lifting and rotating angle of the rotating shaft 3 .

[0019] Furthermore, the limit pin 13 is rotatably connected to the tool holder 1 through the limit pin bearing 14 . The inner ring of the limit pin bearing 14 is interference fit with the limit pin 13 , and the outer ring is embedded in the circular groove of the side wall of the shaft hole 16 .

[0020] Specifically, the axial hole 16 passes through the top and bottom of the tool holder 1 for installation or maintenance. The side wall of the axial 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 and installed in the circular groove, so that the limit pin bearing 14 can support the limit pin 13 to rotate through the inner ring.

[0021] Furthermore, the inclined surface of the oblique side 6 of the pressing block 5 is inclined from top to bottom toward the side away from the shoulder beam 7 .

[0022] Furthermore, it also includes: a positioning block 15, which is fixed to the upper surface of the cutter head 2, and the cutter seat 1 is provided with a groove adapted to the positioning block 15, which is used for clamping and positioning when the cutter head 2 is lifted.

[0023] Furthermore, it includes a gasket 11 which is sleeved on the pin 17 .

[0024] Furthermore, the linear drive device is an electric push rod, a cylinder or a screw slide, the output end of the linear drive device is connected to the pressure block 5, and the linear drive device is existing technology.

[0025] Specifically, the linear drive device can drive the pressure block 5 to move, and the top of the tool holder 1 can be installed on the tool beam of the bending center so that it can be driven by the bending machine to follow the tool beam to rise and fall. The tool head 2 can be screwed in along the radial direction of the rotating shaft 3 through fasteners such as bolts to fasten the tool head 2 to the rotating shaft 3, and can be disassembled for subsequent maintenance. The support shaft 10 supports the rotation of the beam 7 by being rotatably connected with the tool holder 1. The beam 7 and the fork arm 12 are an integrated structure to increase the structural strength. The inclined surface of the hypotenuse 6 of the pressure block 5 is inclined from top to bottom toward the side away from the beam 7, so that when the pressure block 5 moves toward the beam 7, the hypotenuse 6 The inclined surface can press down the downward load-bearing bearing 8, and the inclined edge 6 has an inclination angle of 15 degrees to 35 degrees. At the same time, it rubs against the downward load-bearing bearing 8, and the downward load-bearing bearing 8 can rotate to reduce friction. The shaft of the pin 17 is fixedly connected to the rotating shaft 3. The gasket 11 is sleeved on one end close to the large head of the pin 17 so that the fork arm 12 contacts the gasket 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 with the tool holder 1, it is stuck in the groove to position the cutter head 2. The telescopic part of the spring rod 9 is connected to the carrying beam 7, and the fixed part of the spring rod 9 is connected to the tool holder 1, which can be pulled in the direction away from the carrying beam 7.

[0026] In the above structure: the rotating shaft 3 in the accompanying drawings is in a raised state, at this time, the cutter head 2 is combined with the cutter seat 1; the pressure block 5 is driven away from the supporting beam 7 by the linear drive device, and at this time the spring rod 9 pulls the supporting beam 7 by elastic force, causing the supporting beam 7 to rotate, so that the supporting beam 7 is lifted close to one end of the pressure block 5, and then the rotating shaft 3 is pressed down by the fork arm 12 to lower the rotating shaft 3, and at the same time, one end of the limit pin 13 can slide along the spiral groove 4, and the limit pin 13 can rotate by the limit pin supporting bearing 14 to reduce friction. When the position of the limit pin 13 is fixed, the spiral groove 4 can be The action of self-rotation makes it possible to adjust the angle while descending; the linear drive device drives the pressure block 5 to approach the beam 7, and the bevel 6 on the pressure block 5 contacts the downward pressure bearing bearing 8 provided on the beam 7, so that the bevel 6 presses down the downward pressure bearing bearing 8, and then the end of the beam 7 descends, and the beam 7 can rotate through the support of the support shaft 10, and then the limit pin 13 lifts the rotating shaft 3, and the spiral groove 4 can rotate under the action of the limit pin 13, so that the angle can be adjusted while ascending; the rotation of the rotating shaft 3 while ascending and descending makes the cutter head 2 have an angle or be parallel to the bending edge.

[0027] The above shows and describes the basic principles, main features, and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present application. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. These changes and improvements are intended to fall within the scope of the present application. The scope of protection claimed in this application is defined by the appended claims and their equivalents.

Claims

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

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

3. The rotatable pressing die for a bending center according to claim 1, characterized in that: The limit pin (13) is rotatably connected to the knife seat (1) through the limit pin bearing bearing (14), the inner ring of the limit pin bearing bearing (14) is interference fit with the limit pin (13), and the outer ring is embedded in the circular groove of the side wall of the shaft hole (16).

4. The rotatable pressing die for a bending center according to claim 1, characterized in that: The inclined surface of the hypotenuse (6) of the pressing block (5) is inclined from top to bottom toward a side away from the shoulder beam (7).

5. The rotatable pressing die for a bending center according to claim 1, characterized in that: Also includes: The positioning block (15) is fixed to the upper surface of the cutter head (2), and the cutter seat (1) is provided with a groove adapted to the positioning block (15) for clamping and positioning the cutter head (2) when it is lifted.

6. The rotatable pressing die for a bending center according to claim 1, characterized in that: It also includes a gasket (11) which is sleeved on the pin (17).

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

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