Lower die jacking device for bending machine

Abstract

The utility model relates to a lower die jacking device for a bending machine, which comprises a lower die worktable, a die mounting groove arranged along the full length is arranged in the middle of the top surface of the lower die worktable and used for mounting a lower die, and an inflatable expansion body is mounted at the inner bottom end of the die mounting groove along the length direction. A supporting frame is installed at the top of the inflatable expansion body, a plurality of riding wheels are arranged at the top of the supporting frame, the axes of the riding wheels are perpendicular to the length direction of the die installation groove, an air pipe is arranged at one end of the inflatable expansion body and connected with an electromagnetic control valve, and the electromagnetic control valve is connected with a main control system of the bending machine. Through the arrangement of the supporting frame and the riding wheels, an operator can push the lower die conveniently, and friction between the lower die and the working table top is avoided.

Description

Technical Field

[0001] This utility model relates to the field of bending machine technology, specifically a lower die lifting device for a bending machine. Background Technology

[0002] CNC bending machines bend sheet metal at different angles by controlling the relative positions of the upper and lower dies. Depending on the bending angle, different sizes of lower dies need to be changed on the lower die worktable. When the workpiece has a long bending dimension, longer dies are used to reduce the number of times the working die needs to be changed. These dies are very heavy, and operators typically push them in and out of the lower die worktable from one end of the slot when installing and removing them. This pushing causes the lower surface of the die to come into contact with and rub against the worktable surface, easily causing wear on both the lower die and the worktable. If the lower die worktable is worn, the overall flatness will become inconsistent, causing changes in the installation position of the lower die, resulting in deviations in the bending angle, and in severe cases, defective parts. Wear also accelerates the reduction of the service life of the die and the die worktable.

[0003] Therefore, it is necessary to design a mechanism for lifting the lower mold. This mechanism is controlled by the main control system. It lowers the mold before the machine tool starts working, so that the mold contacts the worktable. When the mold needs to be replaced, it is lifted up to separate the lower mold from the worktable. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art and provide a lower die lifting device for a bending machine.

[0005] The specific solution of this utility model is as follows: a lower die lifting device for a bending machine, including a lower die worktable, a die mounting groove arranged along the entire length in the middle of the top surface of the lower die worktable, the die mounting groove being used to install the lower die, an inflatable expansion body being installed at the bottom end of the die mounting groove along the length direction, a support frame being installed on the top of the inflatable expansion body, a number of rollers being provided on the top of the support frame, the axis of the rollers being perpendicular to the length direction of the die mounting groove, an air pipe being provided at one end of the inflatable expansion body, the air pipe being connected to an electromagnetic control valve, and the electromagnetic control valve being connected to the main control system of the bending machine.

[0006] Furthermore, each end of the mold mounting slot is equipped with a sealing plate, which is connected to the lower mold worktable by bolts.

[0007] Furthermore, a U-shaped protective groove is installed between the mold mounting groove and the inflatable expansion body.

[0008] Furthermore, the rollers are made of bearings, and each bearing has a central shaft at its center, with both ends of the central shaft connected to the support frame.

[0009] Furthermore, the air tube is equipped with a pressure limiting valve, which is used to limit the maximum inflation pressure.

[0010] Compared with the prior art, this utility model has the following advantages: by setting a support frame and rollers, it is easier for the operator to push the lower mold, thus reducing friction on the lower mold; the use of an inflatable body to achieve lifting and lowering does not affect the normal operation of the bending machine; it greatly simplifies the complexity of the device, reduces the size of the device, reduces maintenance difficulty, and lowers machine tool costs. In addition, by controlling the air valve through the main control system, damage to the mold and other devices due to operator misoperation can be avoided. Attached Figure Description

[0011] Figure 1 This is an exploded view of the structure of this utility model;

[0012] Figure 2 yes Figure 1 Enlarged view of point V;

[0013] Figure 3 yes Figure 1 Enlarged view at point X;

[0014] Figure 4 This is an exploded view of the support frame and rollers of this utility model;

[0015] Figure 5 This is a schematic diagram of the inflatable body of this utility model in its contracted state;

[0016] Figure 6 This is a schematic diagram of the inflatable inflatable body of this utility model in its inflated state;

[0017] In the diagram: 1. Sealing plate; 2. Lower mold worktable; 3. U-shaped protective groove; 4. Inflatable expansion body; 41. Air pipe; 5. Support frame; 6. Support roller; 7. Lower mold. Detailed Implementation

[0018] See Figure 1-4 This embodiment is a lower die lifting device for a bending machine, including a lower die worktable 2. A die mounting groove is provided in the middle of the top surface of the lower die worktable 2, which is arranged along the entire length. The die mounting groove is used to install the lower die 7. The bottom end of the lower die 7 is provided with a protrusion that matches the width of the mounting groove. An inflatable expansion body 4 is installed in the bottom end of the die mounting groove along the length direction. A support frame 5 is installed on the top of the inflatable expansion body 4. Several rollers 6 are provided on the top of the support frame 5. The axis of the rollers 6 is perpendicular to the length direction of the die mounting groove. An air pipe 41 is provided at one end of the inflatable expansion body 4. The air pipe 41 is connected to an electromagnetic control valve. The electromagnetic control valve is connected to the main control system of the bending machine. An air pump is provided in the main control system. The air pump can both inflate the inflatable expansion body 4 through the air pipe and extract the gas in the inflatable expansion body 4 outward.

[0019] Furthermore, each end of the mold mounting slot is equipped with a sealing plate 1. The sealing plate 1 is connected to the lower mold worktable 2 by bolts. The sealing plate 1 plays a limiting role for the inflatable body 4. When it is necessary to replace or disassemble the inflatable body 4 / support frame 5, the bolts of the sealing plate 1 can be removed.

[0020] Furthermore, a U-shaped protective groove 3 is installed between the mold mounting groove and the inflatable body 4. The protective groove 3 is used to protect the inflatable body 4 and prevent it from being damaged.

[0021] Furthermore, the roller 6 is made of bearings, and each bearing has a central shaft at its center, with both ends of the central shaft connected to the support frame 5.

[0022] Furthermore, a pressure limiting valve is installed on the air pipe 41 to limit the maximum inflation pressure.

[0023] The working principle of this utility model is as follows: See Figure 5 After the lower die 7 is installed in place, the inflatable body 4 is in a contracted state. At this time, the support frame 5 and the roller 6 do not contact the protrusion of the lower die 7, and the bottom surface of the lower die 7 is in full contact with the worktable surface, allowing the bending machine to perform bending operations normally; see also Figure 6 When the lower mold 7 needs to be replaced or disassembled, the main control system first inflates the inflation body 4 through the electromagnetic control valve, causing the inflation body to expand. After full expansion, due to the increased height of the inflation body, the support frame 5 and the support roller 6 move upward, thereby lifting the lower mold 7 upward through the protrusion. At this time, the bottom surface of the lower mold 7 separates from the worktable surface. When the operator pushes the lower mold 7 horizontally, the protrusion at the bottom of the lower mold 7 slides along the support roller 6, which greatly reduces friction and avoids wear on the lower mold 7 and the worktable surface. This ensures that it still maintains high precision after long-term use, and also improves the service life of the lower mold 7 and the worktable, reducing maintenance costs.

[0024] After each replacement or installation of the lower mold 7, the operator uses the main control system to discharge the gas inside the inflatable body 4 to achieve contraction.

Claims

1. A lower die lifting device for a bending machine, characterized in that: The device includes a lower die worktable. A die mounting slot is provided in the middle of the top surface of the lower die worktable, which is used to install the lower die. An inflatable expansion body is installed at the bottom end of the die mounting slot along the length direction. A support frame is installed on the top of the inflatable expansion body. Several rollers are provided on the top of the support frame. The axis of the rollers is perpendicular to the length direction of the die mounting slot. An air pipe is provided at one end of the inflatable expansion body. The air pipe is connected to an electromagnetic control valve. The electromagnetic control valve is connected to the main control system of the bending machine.

2. The lower die lifting device for a bending machine according to claim 1, characterized in that: Each end of the mold mounting slot is equipped with a sealing plate, which is connected to the lower mold worktable by bolts.

3. The lower die lifting device for a bending machine according to claim 1, characterized in that: A U-shaped protective groove is installed between the mold mounting slot and the inflatable expansion body.

4. The lower die lifting device for a bending machine according to claim 1, characterized in that: The rollers are made of bearings, and each bearing has a central shaft at its center, with both ends of the central shaft connected to the support frame.

5. The lower die lifting device for a bending machine according to claim 1, characterized in that: The air tube is equipped with a pressure limiting valve, which is used to limit the maximum inflation pressure.

Images