Bending die device for machining U-shaped forgings

Abstract

The bending die device comprises a base, two sets of idler wheels, an auxiliary pressing plate, a reset rod, a reset spring and a bent upper punching piece used for applying pressure to a semi-finished forge piece, and each idler wheel comprises an idler wheel body connected with the base in a sliding mode and a shaping pressing face formed by extending upwards in an inclined mode along the idler wheel body; a semi-finished forge piece is placed on the two sets of shaping pressing faces, the upper end of the auxiliary pressing plate abuts against the bottom of the semi-finished forge piece, the lower end of the auxiliary pressing plate is fixedly connected with the roller body, a limiting pin is arranged on the roller body, and a limiting part matched with the limiting pin is arranged on the base. The spring reset rod and the limiting pin achieve reset and movement limiting of the device respectively, the consistency and stability of each bending action are guaranteed, and finally the U-shaped forge piece is well formed.

Description

Technical Field

[0001] This invention relates to the technical field of mold processing, and in particular to a bending die device for processing U-shaped forgings. Background Technology

[0002] Under normal forging conditions, the forging stroke of the upper and lower dies for U-shaped parts is relatively long. Due to the limitation of the punch press stroke, it is impossible to bend the part completely and the demolding is insufficient. In order to address the problem of incomplete product forming, the forging is affected by the uneven temperature and pressure changes during forging, which can lead to inconsistent thickness and make it impossible to guarantee the forging dimensions and U-shaped right angles. Summary of the Invention

[0003] This invention addresses the shortcomings of existing technologies by providing a bending die device for processing U-shaped forgings. A spring return rod and a limiting pin respectively achieve the device's reset and movement limit, ensuring the consistency and stability of each bending action. This device can form the forging to the ideal angle in a secondary process, ultimately resulting in a well-formed U-shaped forging and greatly improving adjustment efficiency.

[0004] To solve the above-mentioned technical problems, the present invention adopts a bending die device for processing U-shaped forgings, which is used to complete the right-angle shaping of semi-finished forgings of about 45°. The device includes: a base, two sets of rollers rotatably mounted on the base via pins, an auxiliary pressure plate mounted on the rollers, a reset rod mounted on the base and located outside the rollers, a reset spring positioned between the reset rod and the rollers, and a bent upper punch for applying pressure to the semi-finished forging. Each roller includes a roller body slidably connected to the base and a shaping and holding surface extending obliquely upwards along the roller body. The semi-finished forging is placed on the two sets of shaping and holding surfaces. The upper end of the auxiliary pressure plate abuts against the bottom of the semi-finished forging, and the lower end of the auxiliary pressure plate is fixedly connected to the roller body. A limiting pin is provided on the roller body, and a limiting part cooperating with the limiting pin is provided on the base.

[0005] In a preferred embodiment of the present invention, the base is provided with two sets of rolling grooves, and the roller body is slidably disposed in the rolling grooves.

[0006] In a preferred embodiment of the present invention, the rolling groove is an arc-shaped groove structure.

[0007] In a preferred embodiment of the present invention, the base is provided with two sets of connecting ears, and the roller body is rotatably mounted on the connecting ears via a pin.

[0008] In a preferred embodiment of the present invention, the connecting ear and the base are integrally formed.

[0009] In a preferred embodiment of the present invention, the limiting part includes a sliding inclined surface disposed on the connecting ear and a limiting boss disposed on the front end of the sliding inclined surface.

[0010] In a preferred embodiment of the present invention, a first hook is provided at the top of the reset rod, a second hook is provided on the outer end face of the shaping and pressing surface, and the two ends of the reset spring are respectively provided on the first hook and the second hook.

[0011] The beneficial effects of this invention are: the return spring on the spring return rod can realize the return of the roller after pressing, and the limit pin and the limit part on the connecting ear can realize the movement limit of the roller, ensuring the consistency and stability of each bending action, and can form the forging to the ideal angle in the second stage, so as to make the U-shaped forging well formed and ensure the right angle forming accuracy of the U-shaped forging. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0013] Figure 1 This is a schematic diagram of the bending die device for U-shaped forging processing according to the present invention after installation;

[0014] Figure 2 This is a schematic diagram of the product after the semi-finished forging has been bent and shaped by this device. Detailed Implementation

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Please see Figure 1-2This invention discloses a bending die device for processing U-shaped forgings. First, a punch press is used to forge the forging into a semi-finished forging with an outward angle of approximately 45°. Then, the bending die device of this invention is used to further shape it to an ideal right angle, resulting in the finished product 14. The bending die device includes: a base 1; two sets of rollers 2 rotatably mounted on the base via pins; an auxiliary pressure plate 3 mounted on the rollers; a reset rod 4 located on the base outside the rollers; a reset spring 5 positioned between the reset rod and the rollers; and a bent upper punch 6 for applying pressure to the semi-finished forging. Each roller includes a roller body 21 slidably connected to the base and a shaping and pressing surface 22 extending obliquely upwards along the roller body. The upper end of the auxiliary pressure plate is connected to the bottom of the semi-finished forging. The lower end of the auxiliary pressure plate is fixedly connected to the roller body. Two sets of connecting ears 8 are provided on the base. The roller body is rotatably mounted on the connecting ears via a pin 9. The connecting ears and the base are integrally formed. During the operation of the bending die device, the semi-finished forging 7, which is about 45° outward, is placed on the two sets of forming and holding surfaces and is in close contact with them. Under the action of the external driving mechanism, the bending upper punch moves downward as the active force-applying component. The semi-finished forging pushes the roller to start rotating around the pin through the auxiliary pressure plate, so that the two sets of forming and holding surfaces move towards each other. The rotation of the roller and the movement of the two sets of forming and holding surfaces towards each other perform the squeezing action, gradually bending the 45° semi-finished product to the ideal U-shaped right angle state.

[0017] Furthermore, the roller body is provided with a limiting pin 10, and the base is provided with a limiting part that cooperates with the limiting pin. Specifically, the limiting part includes a sliding inclined surface 81 provided on the connecting ear and a limiting boss 82 provided on the front end of the sliding inclined surface. When the auxiliary pressure plate pushes the roller to rotate around the pin shaft, the semi-finished forging is shaped by the rotation and squeezing action of the roller. The limiting pin slides upward along the sliding inclined surface until it contacts the limiting boss, so as to limit the extreme position of the roller's rotation trajectory. The return spring on the spring return rod can realize the return of the roller after pressing. The limiting pin and the limiting part on the connecting ear can realize the movement limit of the roller, ensuring the consistency and stability of each bending action. It can be applied to the processing of U-shaped forgings of various materials, especially in the production of U-shaped forgings with high requirements for dimensional accuracy and right angle, and has significant application advantages.

[0018] Furthermore, the base is provided with two sets of rolling grooves 11, and the roller body is slidably disposed in the rolling grooves. The rolling grooves are arc-shaped groove structures to facilitate the smooth sliding of the rollers in the rolling grooves.

[0019] Furthermore, a first hook 12 is provided at the top of the reset rod, and a second hook 13 is provided on the outer end face of the shaping and pressing surface. The two ends of the reset spring are respectively provided on the first hook and the second hook, which can realize the reset of the roller after pressing.

[0020] The beneficial effects of this invention are:

[0021] (1) The return spring on the spring return rod can realize the return of the roller after pressing. The limit pin and the limit part on the connecting ear can realize the movement limit of the roller, ensuring the consistency and stability of each bending action, and can form the forging to the ideal angle in the second time, so that the U-shaped forging is well formed and the right angle forming accuracy of the U-shaped forging is ensured.

[0022] (2) The bending die device has a simple structure and smooth cooperation of each component. The operation process is easy to control, which can effectively improve production efficiency and reduce the difficulty of equipment maintenance and operation.

[0023] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A bending die device for processing U-shaped forgings, used to complete the right-angle shaping of semi-finished forgings at approximately 45°, characterized in that, include: The system comprises a base, two sets of rollers rotatably mounted on the base via pins, an auxiliary pressure plate mounted on the rollers, a reset rod mounted on the base and located outside the rollers, a reset spring positioned between the reset rod and the rollers, and a curved upper punch for applying pressure to the semi-finished forging. Each roller includes a roller body slidably connected to the base and a shaping and pressing surface extending obliquely upwards along the roller body. The semi-finished forging is placed on the two sets of shaping and pressing surfaces. The upper end of the auxiliary pressure plate abuts against the bottom of the semi-finished forging, and the lower end of the auxiliary pressure plate is fixedly connected to the roller body. A limit pin is provided on the roller body, and a limiting part that cooperates with the limit pin is provided on the base.

2. The bending die device for processing U-shaped forgings according to claim 1, characterized in that, The base is provided with two sets of rolling grooves, and the roller body is slidably disposed in the rolling grooves.

3. A bending die device for processing U-shaped forgings according to claim 2, characterized in that, The rolling groove is an arc-shaped groove structure.

4. A bending die device for processing U-shaped forgings according to claim 1, characterized in that, The base is provided with two sets of connecting ears, and the roller body is rotatably mounted on the connecting ears via a pin.

5. A bending die device for processing U-shaped forgings according to claim 4, characterized in that, The connecting ear and the base are integrally formed.

6. A bending die device for processing U-shaped forgings according to claim 4, characterized in that, The limiting part includes a sliding inclined surface disposed on the connecting ear and a limiting boss disposed at the front end of the sliding inclined surface.

7. A bending die device for processing U-shaped forgings according to claim 1, characterized in that, The top end of the reset rod is provided with a first hook, the outer end face of the shaping and pressing surface is provided with a second hook, and the two ends of the reset spring are respectively provided on the first hook and the second hook.

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