CN104475502B - A kind of polygon bender - Google Patents

Abstract

The invention discloses a multilateral bending machine and relates to a bending machine. It includes a knife rest in the shape of a "concave" as a whole, and the legs on both sides are slightly opened outwards. The outside of the middle part of the knife rest is connected to the swing arm through a shaft. A first lower mold is provided at the inner apex of the lower leg, and the mold and the knife holder are connected by bolts. It is characterized in that a polygonal through hole is arranged in the middle of the first upper mold and the first lower mold, and a For the matching polygonal push block, one end face of the push block does not exceed the left end face of the mould, and at least one push device is connected to the end of the push block away from the mould. When the thin plate is bent at a certain angle, the pushing device is activated to push the push block to move towards the direction of the thin plate, and push one bent edge of the thin plate to continue to approach the other bent edge, so that the bending angle of the thin plate is greater than 90°.

Description

A Multilateral Bending Machine

technical field

The invention relates to a bending machine, in particular to a multilateral bending machine.

Background technique

A bending machine is a machine capable of bending thin plates. Existing bending machines need to adjust the distance between the mold and the bending mold when bending thin plates and thick plates. Most of them need to be adjusted manually, or additional mechanisms are added to adjust. time. A Chinese patent application for a bending machine, application number 201310295375.0, includes a feeding mechanism clamping device, a bending mechanism and a balance spring device. The feeding mechanism clamping device includes a U-shaped beam, a cylinder, a pressure rod, a bearing, a servo motor, the first The rotating chassis and the second rotating chassis, the upper end of the U-shaped beam is equipped with a cylinder, the pressure rod is installed on the cylinder, the lower end of the pressing rod is equipped with a bearing, the second rotating chassis is installed on the outer shell of the bearing, and the lower end of the U-shaped beam is installed. The servo motor is equipped with a first rotating chassis; the bending mechanism includes a first mold, a second mold, a knife rest, a swing arm and an oil cylinder, and the knife rest is connected with the swing arm by means of a shaft. The bending machine can bend positive and negative angles without manual turnover, saving time and improving work efficiency. In this bending machine, the thin plate is fixed by the second mold. The first mold rotates around the axis, and a downward or upward force is given to one end of the thin plate to bend the thin plate. Since the first mold rotates around the axis, as long as it passes through the axis Only when the plane of the axis of the axis coincides with the plane where the thin plate is located, can the thin plate be bent at a right angle, while in other cases, the thin plate can only be bent into an acute angle. That is, the bending angle of the bending machine is greater than 0° and less than or equal to 90°.

Contents of the invention

The purpose of the present invention is to propose a bending machine that can bend positive and negative angles without manual turning over the plate, and the bending angle can be greater than 90°.

In order to achieve the above purpose, the following technical solutions are provided:

A bending machine, including a tool rest in the shape of a "concave" as a whole, the legs on both sides are slightly opened outwards, the outside of the middle part of the tool rest is connected to the swing arm through a shaft, and the inner apex of the legs on the tool rest is provided with a second An upper mold, a first lower mold is provided at the apex of the inner side of the lower leg of the knife rest, and the mold and the knife rest are connected by bolts, and it is characterized in that the middle of the first upper mold and the first lower mold is provided with a polygonal through hole, A matching polygonal push block is arranged in the through hole, the left end face of the push block does not exceed the left end face of the mould, and at least one push device is connected to the end of the push block away from the die. When the thin plate is bent at a certain angle, the pushing device is activated to push the push block to move towards the direction of the thin plate, and push one bent edge of the thin plate to continue to approach the other bent edge, so that the bending angle of the thin plate is greater than 90°.

The pushing device can be a screw drive mechanism, hydraulic drive or cylinder drive, preferably a screw drive mechanism, including a screw rod, and an internally threaded hole matched with the screw rod is arranged in the axial direction at the end of the push block away from the mold, and the screw rod Inserted in the internal thread hole of the push block, the end of the screw rod far away from the push block is fixedly connected to the end of the coupling, the other end of the coupling is fixedly connected to the driven gear, and the driven gear is connected to the driving gear through a synchronous toothed chain. The driving gear is fixedly connected to the output end of the reduction box, and the power input end of the reduction box is connected to the output end of the motor. The power source of the driving device is the motor. The application of the motor can realize the automatic control of the bending machine. The driving gear drives the driven gear to rotate through the toothed chain, and the driven gear drives the screw to rotate. The power transmission is accurate and can accurately control the bending of the thin plate. The angle of the fold.

Further, a protrusion is provided on the inner side of the knife rest leg close to the mold, and a polygonal through hole matching with the push block is arranged in the protrusion, and the push block always moves in the through hole provided by the knife rest to increase the stability of the structure .

Further, the axis of the through hole provided in the middle of the first upper mold and the first lower mold is parallel to the plane where the side wall of the leg is located.

Further, the length of the push block is greater than the thickness of the mould.

Further, the push block is a cuboid.

The beneficial effects of the present invention are:

(1) The second upper mold and the second lower mold clamp the thin plate, and the hydraulic device above the tool holder is activated to make the first mold close to the thin plate and press down or lift the part of the thin plate beyond the second mold to bend the thin plate. When the thin plate is bent at a certain angle, the pushing device is activated to push the push block to move in the direction of the thin plate in the through hole protruding from the first mold and the tool holder, and push one bent edge of the thin plate to continue to approach the other bent edge to realize the thin plate The bending angle is greater than 90°.

(2) The pushing device is a screw drive mechanism, and the end of the push block away from the mold is axially provided with an internal threaded hole that matches the screw rod, and the screw rod is inserted into the internal thread hole of the push block, and the end of the screw rod is far away from the push block One end of the coupling is fixedly connected, the other end of the coupling is fixedly connected with the driven gear, the driven gear is connected with the driving gear through the synchronous toothed chain, the driving gear is fixedly connected with the output end of the reduction box, and the power input of the reduction box connected to the output terminal of the motor. The power source of the driving device is the motor. The application of the motor can realize the automatic control of the bending machine. The driving gear drives the driven gear to rotate through the toothed chain, and the driven gear drives the screw to rotate. The power transmission is accurate and can accurately control the bending of the thin plate. The angle of the fold.

(3) Protrusions are provided on the inner side of the knife rest legs close to the mold, and through holes matching the push blocks are arranged in the protrusions. The push blocks always move in the through holes provided by the knife rest to increase the stability of the structure.

Description of drawings

Fig. 1 is a structural schematic diagram of a bending machine of the present invention;

Fig. 2 is a front view of the pushing device;

Figure 3 is a side view of the pushing device.

Among them: 1. First upper mold 2. Push block, 3. Bolt, 4. Screw rod, 5. Coupling, 6. Driven gear, 7. Synchronous toothed chain, 8. Driving gear, 9. Reducer , 10, motor, 11, knife rest, 12, swing arm, 13, the first lower mold, 14, the second upper mold, 15, the second lower mold, 16, the shaft.

detailed description

A preferred embodiment of the present invention will be further described below in conjunction with the accompanying drawings, so as to help understand the content of the present invention.

As shown in Figures 1 to 3, the present invention includes a tool rest 11 that is in the shape of a "concave" as a whole. Connection, the first upper mold 1 is provided at the inner vertex of the upper leg of the knife rest 11, and the first lower mold 13 is arranged at the inner vertex of the lower leg of the knife rest 11, and the mold and the knife rest 11 are connected by bolts 3; the first upper mold 1 and The center of the first lower mold 13 is provided with a rectangular through hole, and a rectangular push block 2 matched with it is arranged in the through hole, and the left end face of the push block 2 does not exceed the left end face of the mould; The protrusion is provided with a rectangular through hole matched with the push block 2 inside the protrusion. The push block 2 can move in the through holes provided on the first mold 1 and the knife rest 11 . Two internally threaded holes are uniformly arranged on the end of the push block 2 away from the mold, the screw rod 4 is inserted into the internally threaded hole of the push block 2, and the end of the screw rod 4 away from the push block 2 is fixedly connected with the end of the coupling 5, and the coupling The other end of 5 is fixedly connected with the driven gear 6, the driven gear 6 is connected with the driving gear 8 through the synchronous toothed chain 7, the driving gear 8 is fixedly connected with the output end of the reduction box 9, and the input end of the reduction box 9 is connected with the motor 10 output connection.

The specific working method:

The second upper mold 14 and the second lower mold 15 clamp the thin plate, start the hydraulic device above the tool rest 11, push the knife rest 11 to rotate around the axis 16, and continue to rotate around the axis when the first mold is close to the thin plate, so that the thin plate bends At this time, the bending angle of the thin plate is at most 90°. When the bending angle of the sheet needs to be greater than 90°, start the motor 10 of the driving device, the output end of the motor 10 is connected to the input end of the reduction box 9, the output end of the reduction box 9 is fixedly connected to the driving gear 8, and drives the driving gear 8 to rotate together , the driving gear 8 drives the driven gear 6 to rotate together through the synchronous toothed chain 7, because the driven gear 6 is connected with the screw mandrel 4 through the coupling 5, so it can drive the screw mandrel 4 to rotate together. The other end of the screw rod 4 is threadedly connected with the push block 2, the screw rod 4 is fixed and can only rotate and move, while the push block 2 is square, cannot rotate in the first mold, but can only move forward, and then pushes the push block. Block 2 moves forward and pushes one bending edge of the thin plate to continue to approach the other bending edge, so that the bending angle of the thin plate is greater than 90°.

Claims (7)

1. A multilateral bending machine, comprising a tool rest (11) in the shape of a "concave" as a whole, the legs on both sides are slightly opened outwards, and the outer middle part of the tool rest (11) passes through the shaft (16) and the swing arm (12) connection, the first upper mold (1) is provided at the inner apex of the upper leg of the knife rest (11), and the first lower mold (13) is provided at the inner apex of the lower leg of the knife rest (11), and the mold and the knife rest ( 11) Connected by bolts (3), characterized in that polygonal through-holes are provided in the middle of the first upper mold (1) and the first lower mold (13), and polygonal through-holes are provided to match them. The push block (2), the left end face of the push block (2) does not exceed the left end face of the mould, and at least one push device is connected to the end of the push block (2) away from the mould. 2. A polygonal bending machine according to claim 1, characterized in that: said pushing device is a screw drive mechanism, hydraulic drive or cylinder drive. 3. A multilateral bending machine according to claim 2, characterized in that: the screw drive mechanism includes a screw (4), and the end of the push block (2) away from the mold is axially provided with the screw (4) Matching internal threaded hole, the screw rod (4) is inserted into the internal threaded hole of the push block (2), and the end of the screw rod (4) away from the push block (2) is fixedly connected with the end of the coupling (5) , the other end of the coupling (5) is fixedly connected with the driven gear (6), the driven gear (6) is connected with the driving gear (8) through the synchronous toothed chain (7), and the driving gear (8) is connected with the reduction box The output end of (9) is fixedly connected, and the input end of the reduction box (9) is connected with the output end of the motor (10). 4. A multilateral bending machine according to claim 1, characterized in that: a protrusion is provided on the inner side of the foot of the knife rest (11) close to the mold, and a protrusion is provided in the protrusion to cooperate with the push block (2). polygonal vias. 5. A multilateral bending machine according to claim 1, characterized in that: the axis of the through hole provided in the middle of the first upper mold (1) and the first lower mold (13) is in the same position as the side wall of the leg plane parallel. 6. A multilateral bending machine according to claim 1, characterized in that: the length of the push block (2) is greater than the thickness of the mould. 7. A multilateral bending machine according to claim 1, characterized in that: the push block (2) is a cuboid.