Semi-automatic hydraulic bending machine

Abstract

The utility model relates to the technical field of bending machines, and discloses a semi-automatic hydraulic bending machine which is composed of a base, a lower die, a bending groove, a top plate, a fixing plate, an upper pressing die and the like, a first pipe groove is formed in the middle of the top face of the bending groove, a second pipe groove is formed in the middle of the bottom face of the upper pressing die, and a movable cavity is formed in the upper pressing die. And the interior of the movable cavity is slidably connected with a piston plate. After a workpiece is bent, the hydraulic telescopic cylinder can drive the upper pressing die to move upwards, at the moment, the fixing rod can penetrate through the fixing plate to enter the movable cavity and abut against the piston plate, the piston plate is made to move downwards, then the piston plate can drive the connecting rod and the ejector block to move downwards, and the ejector block pushes the workpiece clamped on the upper pressing die to fall off. And meanwhile, when the piston plate moves downwards, gas in the movable cavity can be extruded, so that the gas in the movable cavity is exhausted through a connecting groove and a gas outlet groove and acts on the workpiece clamped at the upper pressing die, and the workpiece is promoted to fall off from the upper pressing die.

Description

Technical Field

[0001] The utility model relates to the technical field of bending machines, in particular to a semi-automatic hydraulic bending machine. Background Art

[0002] A hydraulic bending machine is a machine that bends the workpiece to be bent by the pressure generated by the oil cylinder. Currently, most hydraulic bending machines on the market are split bending machines. The split bending machine uses the oil output by the hydraulic station to generate pressure to achieve automatic bending of the workpiece to be bent. In the existing split bending machines, the workpiece to be bent is placed on the lower die, which has a bending groove. The punch on the upper die presses down the workpiece to be bent so that the bent workpiece forms a bending structure with the same shape as the bending groove.

[0003] During use, the existing hydraulic bending machine uses an upper mold to press the workpiece to be bent into the bending groove of the lower mold, and then opens the hydraulic cylinder to bend the workpiece. Since the workpiece is bent in the direction of the upper mold, the workpiece will be subjected to stress after bending and easily get stuck in the upper mold, making it difficult to detach, thereby reducing the working efficiency of the equipment. Utility Model Content

[0004] In view of the shortcomings of existing bending machines, the utility model provides a semi-automatic hydraulic bending machine, which has the advantages of preventing the workpiece from getting stuck on the upper die after bending and improving the applicability of the bending machine, solving technical problems such as the workpiece getting stuck on the upper die and being difficult to remove after bending.

[0005] The utility model provides the following technical solution: a semi-automatic hydraulic bending machine, including a base, and also including:

[0006] The lower mold is fixedly mounted on the middle of the top surface of the base, a bending groove is opened in the middle of the lower mold, and the top surface of the base is fixedly connected with a fixing frame on both sides of the bending groove, and the top of the fixing frame is fixedly connected with a top plate;

[0007] A hydraulic telescopic cylinder is fixedly installed at the middle part of the bottom surface of the top plate, a fixing plate is fixedly installed at the lower end of the hydraulic telescopic cylinder, and an upper pressing die is fixedly installed at the middle part of the bottom surface of the fixing plate.

[0008] Preferably, the bending groove and the upper die include:

[0009] A pipe groove 1 is provided in the middle of the top surface of the bending groove;

[0010] The second pipe groove is arranged in the middle part of the bottom surface of the upper die.

[0011] Preferably, the interior of the upper die includes:

[0012] An active cavity is provided inside the upper die;

[0013] A piston plate, slidably connected to the interior of the movable chamber;

[0014] The fixing rod is fixedly connected to the bottom surface of the top plate and is located on both sides of the hydraulic telescopic cylinder. The fixing plate and the upper die are provided with holes for the fixing rod to slide.

[0015] Preferably, the piston plate comprises:

[0016] A connecting rod, fixedly connected to the middle portion of the bottom surface of the piston plate;

[0017] A top block, fixedly connected to the bottom end of the connecting rod;

[0018] A spring is fixedly connected to the middle of the top surface of the piston plate, and the top end of the spring is fixedly connected to the top surface of the active chamber.

[0019] Preferably, the interior of the piston plate and the connecting rod includes:

[0020] A connecting groove is provided inside the piston plate;

[0021] An air outlet groove is provided inside the connecting rod, an upper opening of the air outlet groove is communicated with the connecting groove, and a lower opening of the air outlet groove passes through the bottom of the top block.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] 1. By designing the movable chamber, piston plate, connecting rod, top block and fixed rod, when the workpiece is bent, the hydraulic telescopic cylinder will drive the upper die to move upward. At this time, the fixed rod will pass through the fixed plate into the movable chamber and press on the piston plate, causing the piston plate to move downward. Then the piston plate will drive the connecting rod and the top block to move downward, causing the top block to push the workpiece stuck on the upper die to fall. At the same time, when the piston plate moves downward, it will squeeze the gas inside the movable chamber, causing the gas inside the movable chamber to be discharged through the connecting groove and the air outlet groove, and act on the workpiece stuck at the upper die, promoting the workpiece to fall from the upper die.

[0024] 2. By designing pipe groove one and pipe groove two, due to the cooperation of pipe groove one and pipe groove two, when the workpiece to be bent is a pipe, the pipe can be clamped in pipe groove one, and the pipe can be bent through pipe groove two at the upper die, which increases the applicability of the bending machine. Secondly, the workpiece can be bent at different angles by replacing the lower die at different angles. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall structure of the bending machine of the utility model;

[0026] Figure 2 This is a schematic diagram of the internal structure of the active cavity of the utility model;

[0027] Figure 3 This is a schematic diagram of the internal structure of the connecting rod of the utility model.

[0028] In the figure: 1. base; 2. lower mold; 3. bending groove; 31. pipe groove one; 4. fixed frame; 5. top plate; 51. fixed rod; 6. hydraulic telescopic cylinder; 7. fixed plate; 8. upper die; 81. pipe groove two; 82. movable cavity; 83. piston plate; 831. connecting groove; 84. connecting rod; 841. air outlet groove; 85. top block; 86. spring. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] See also Figure 1-Figure 3 A semi-automatic hydraulic bending machine comprises a base 1, a lower mold 2 is fixedly installed in the middle of the top surface of the base 1, a bending groove 3 is opened in the middle of the lower mold 2, a fixing frame 4 is fixedly welded on both sides of the bending groove 3 on the top surface of the base 1, a top plate 5 is fixedly welded on the top of the fixing frame 4, a hydraulic telescopic cylinder 6 is fixedly installed in the middle of the bottom surface of the top plate 5, a fixing plate 7 is fixedly installed at the lower end of the hydraulic telescopic cylinder 6, and an upper pressing die 8 is fixedly installed in the middle of the bottom surface of the fixing plate 7.

[0031] See also Figure 1-Figure 3 A pipe groove 1 31 is opened in the middle of the top surface of the bending groove 3, and a pipe groove 2 81 is opened in the middle of the bottom surface of the upper die 8. When the workpiece is a pipe, the pipe groove 1 31 and the pipe groove 2 81 can be used to bend the pipe, thereby improving the applicability of the bending machine.

[0032] See also Figure 1-Figure 3 A movable cavity 82 is provided inside the upper die 8, and a piston plate 83 is slidably connected inside the movable cavity 82. The bottom surface of the top plate 5 is located on both sides of the hydraulic telescopic cylinder 6 and is fixedly connected to fixed rods 51. Holes for sliding the fixed rods 51 are provided inside the fixed plate 7 and the upper die 8, so that the fixed rods 51 can enter the movable cavity 82 when the upper die 8 moves upward, and push the piston plate 83 downward.

[0033] See also Figure 1-Figure 3A connecting rod 84 is fixedly welded to the middle part of the bottom surface of the piston plate 83, a top block 85 is fixedly welded to the bottom end of the connecting rod 84, a spring 86 is fixedly welded to the middle part of the top surface of the piston plate 83, and the top end of the spring 86 is fixedly welded to the top surface of the movable chamber 82, so that when the piston plate 83 moves downward, the top block 85 can be driven downward by the connecting rod 84, thereby pushing the workpiece stuck in the upper die 8 to fall.

[0034] See also Figure 1-Figure 3 A connecting groove 831 is provided inside the piston plate 83, and an air outlet groove 841 is provided inside the connecting rod 84. The upper opening of the air outlet groove 841 is communicated with the connecting groove 831, and the lower opening of the air outlet groove 841 passes through the bottom of the top block 85. When the piston plate 83 moves downward, the air inside the active cavity 82 is squeezed by the piston plate 83, so that the air in the active cavity 82 can be discharged through the connecting groove 831 and the air outlet groove 841 and act on the workpiece stuck at the upper die 8.

[0035] Working principle: When the workpiece needs to be bent, the workpiece is placed in the bending groove 3, and then the hydraulic telescopic cylinder 6 is turned on. The hydraulic telescopic cylinder 6 drives the fixed plate 7 and the upper die 8 to move downward to bend the workpiece. After the workpiece is bent, the hydraulic telescopic cylinder 6 drives the fixed plate 7 and the upper die 8 to move upward. If the workpiece is stuck on the upper die 8 at this time, due to the upward movement of the upper die 8, the fixed rod 51 will pass through the fixed plate 7 and enter the active cavity 82. After the fixed rod 51 enters the active cavity 82, it will push the piston plate 83 to move downward, so that the piston plate 83 drives the connecting rod 84 and the top block 85 to move downward, and the top block 85 is used to move the connecting rod 84 and the top block 85 downward. The workpiece stuck at the upper die 8 is dropped. At the same time, when the piston plate 83 moves downward, the piston plate 83 squeezes the air inside the active cavity 82, so that the air inside the active cavity 82 is discharged through the connecting groove 831 and the air outlet groove 841, and acts on the workpiece stuck at the upper die 8 to promote the workpiece to drop. When the workpiece is a pipe, the pipe is placed at the pipe groove 1 31, and then the pipe groove 2 81 on the upper die 8 is used to bend the pipe. When the workpiece needs to be bent into different angles, it only needs to replace the lower die 2 to achieve bending of the workpiece at different angles, thereby improving the applicability of the bending machine.

Claims

1. A semi-automatic hydraulic bending machine, comprising a base (1), characterized in that: Also includes: The lower mold (2) is fixedly mounted on the middle of the top surface of the base (1); a bending groove (3) is provided in the middle of the lower mold (2); a fixing frame (4) is fixedly connected to the top surface of the base (1) on both sides of the bending groove (3); and a top plate (5) is fixedly connected to the top of the fixing frame (4); A hydraulic telescopic cylinder (6) is fixedly mounted on the middle part of the bottom surface of the top plate (5); a fixing plate (7) is fixedly mounted on the lower end of the hydraulic telescopic cylinder (6); and an upper pressing die (8) is fixedly mounted on the middle part of the bottom surface of the fixing plate (7).

2. A semi-automatic hydraulic bending machine according to claim 1, characterized in that: The bending groove (3) and the upper die (8) include: A pipe groove (31) is provided in the middle of the top surface of the bending groove (3); The second pipe groove (81) is provided in the middle of the bottom surface of the upper pressing die (8).

3. A semi-automatic hydraulic bending machine according to claim 2, characterized in that: The interior of the upper die (8) comprises: An active cavity (82) is provided inside the upper die (8); A piston plate (83) slidably connected inside the movable chamber (82); The fixing rod (51) is fixedly connected to the bottom surface of the top plate (5) and is located on both sides of the hydraulic telescopic cylinder (6). The fixing plate (7) and the upper die (8) are provided with holes for the fixing rod (51) to slide.

4. A semi-automatic hydraulic bending machine according to claim 3, characterized in that: The piston plate (83) comprises: A connecting rod (84) fixedly connected to the middle portion of the bottom surface of the piston plate (83); A top block (85) fixedly connected to the bottom end of the connecting rod (84); A spring (86) is fixedly connected to the middle of the top surface of the piston plate (83), and the top end of the spring (86) is fixedly connected to the top surface of the active chamber (82).

5. A semi-automatic hydraulic bending machine according to claim 4, characterized in that: The interior of the piston plate (83) and the connecting rod (84) includes: A connecting groove (831) is provided inside the piston plate (83); An air outlet groove (841) is provided inside the connecting rod (84), the upper opening of the air outlet groove (841) is communicated with the connecting groove (831), and the lower opening of the air outlet groove (841) passes through the bottom of the top block (85).

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