U-shaped groove bending mechanism of bending machine

Abstract

The U-shaped groove bending mechanism of the bending machine comprises a base, a lower die block, a spring, an upper die block and a push block, the bending mechanism presses downwards through the upper die block under the power effect of the bending machine, the upper die block and the lower die block act to bend a workpiece for the first time, a clamping groove is pushed through a clamping protrusion in the pressing process of the lower die block, the push block is made to rotate, and the workpiece is bent for the second time. The upper end face of the clamping groove pushes the workpiece to be bent towards the upper die block, and a U-shaped bent groove is formed. And after machining is completed, the upper die block resets, the lower die block resets upwards under the action of the elastic force of the spring, the upper end of the lower die block upwards ejects out of the clamping groove of the push block, the push block rotates to avoid, and the bending action is completed. The bending mechanism can be used for bending a U-shaped groove with a 10-mm gap, bending interference is avoided, and the bending mechanism is especially suitable for U-shaped bending machining of PC workpieces. The upper die is free of scratching and material blocking when a part is taken out after being formed, the overall structure is simple, the number of bending times is small, the machining time is short, the production efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of bending machines, and in particular relates to a U-shaped groove bending mechanism of a bending machine. Background Art

[0002] Bending is a bending method used by bending machines. At present, the commonly used bending device structure is mainly divided into two components: the lower die and the upper die. The U-shaped bending groove has always been a difficult point in the bending operation. When using the commonly used bending device for bending operations, it is necessary to undergo two bending processes, and even the parts need to be turned over many times, which takes a long time to process. For gaps less than 10mm, there will be bending interference. Due to the small gap between the lower die head and the bending knife, even if the outer layer of the PC is covered with a protective film, it will cause indentations on the processed parts, affecting the quality of the product and increasing the defective rate. Utility Model Content

[0003] The utility model provides a U-shaped groove bending mechanism of a bending machine, which can effectively solve the above problems.

[0004] The utility model is achieved in this way:

[0005] The top of the lower module is provided with a locking convexity, and the lower end of the lower module is provided with a locking convexity, and the lower module is installed in the lower step groove, and the spring is arranged between the base and the lower module; the upper end of the lower module is provided with a "V"-shaped right-angle groove, and the lower end of the upper module is inclined to the side of the upper step groove and matched with the right-angle groove; a convex shaft is provided in the upper step groove, and an axial groove is provided on the corresponding push block, the convex shaft is rotatably connected with the axial groove, and a rotation gap is provided between the push block and the upper step groove away from the lower module side, and the push block is rotatably arranged in the upper step groove; a locking groove is provided on the side of the push block near the lower module, and the upper end surface of the locking groove is parallel to the side surface of the inclined end of the upper module; a locking convex matching the locking groove is provided on the side of the lower module, and an avoidance guide angle is provided at the lower end of the push block.

[0006] As a further improvement, the springs are evenly distributed between the base and the lower module.

[0007] As a further improvement, a guide hole is provided on at least one side of the base and the lower module, and the spring is arranged in the guide hole.

[0008] As a further improvement, a guide rod is provided in the guide hole, and the spring is sleeved on the guide rod.

[0009] As a further improvement, the angle between the lower end surface of the locking groove and the horizontal direction is an acute angle.

[0010] As a further improvement, the angle between the lower end surface of the locking groove and the horizontal direction is 45°.

[0011] As a further improvement, the angles of the locking groove and the locking protrusion are both rounded.

[0012] The beneficial effects of the utility model are as follows: the bending mechanism is provided with an upper module, a spring, a lower module and a push block. The upper module is pressed down by the power of the bending machine, and the upper module and the lower module are moved to form the first bending of the workpiece. During the pressing process of the lower module, the positioning groove is pushed by the positioning convex, so that the push block rotates, and the upper end surface of the positioning groove pushes the workpiece to bend toward the upper module to form a U-shaped bending groove; after the processing is completed, the upper module is reset, and the lower module is reset upward under the action of the spring elastic force, and the upper end of the lower module pushes the positioning groove of the push block upward, and the push block rotates to avoid, completing the bending action. The bending mechanism can realize the bending of the U-groove with a gap of 10mm without generating bending interference, especially for the U-shaped bending processing of PC workpieces; when the upper die is taken out after the parts are formed, there is no scratch or jamming phenomenon, the overall structure is simple, the number of bending times is small, and the processing time is short, which not only improves the production efficiency but also reduces the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a structural schematic diagram provided by an embodiment of a U-shaped groove bending mechanism of a bending machine of the utility model;

[0015] Figure 2 It is a front view of an embodiment of a U-shaped groove bending mechanism of a bending machine of the utility model;

[0016] Figure 3 It is an exploded view provided by an embodiment of a U-shaped groove bending mechanism of a bending machine of the utility model;

[0017] Figure 4 It is another exploded view provided by an embodiment of a U-shaped groove bending mechanism of a bending machine of the utility model;

[0018] Figure 5 This is a schematic diagram of the first step of bending provided by an embodiment of a U-shaped groove bending mechanism of a bending machine of the utility model;

[0019] Figure 6 It is a schematic diagram of the second step of bending provided by an embodiment of a U-shaped groove bending mechanism of a bending machine of the utility model.

[0020] Reference numerals:

[0021] Base 1; two-step groove 11; lower step groove 12; limiting protrusion 121; upper step groove 13; convex shaft 131; lower module 2; locking protrusion 21; right-angle groove 22; locking protrusion 23; spring 3; guide hole 31; guide rod 32; upper module 4; push block 5; shaft groove 51; rotation gap 52; locking groove 53; avoidance guide angle 54. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are 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. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the utility model.

[0023] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] In the description of the present invention, the terms "upper", "middle", "side", "side", "upper side", "end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 a limitation on the present invention.

[0025] Reference Figure 1-6As shown, a U-shaped groove bending mechanism of a bending machine includes a base 1, a lower module 2, a spring 3, an upper module 4 and a push block 5. The base 1 is provided with a two-stage step groove 11, and the top of the lower step groove 12 is provided with a relative limiting convex 121. The lower end of the lower module 2 is provided with a clamping convex 21, and the lower module 2 is installed in the lower step groove 12. The spring 3 is arranged between the base 1 and the lower module 2; the upper end of the lower module 2 is provided with a "V"-shaped right-angle groove 22, and the lower end of the upper module 4 is inclined to the upper step groove 13 side and matches the right-angle groove 22; A convex shaft 131 is provided in the upper step groove 13, and a shaft groove 51 is provided on the corresponding push block 5. The convex shaft 131 is rotatably connected to the shaft groove 51, and a rotation gap 52 is provided between the push block 5 and the upper step groove 13 away from the lower module 2. The push block 5 is rotatably arranged in the upper step groove 13; a locking groove 53 is provided on the side of the push block 5 close to the lower module 2, and the upper end surface of the locking groove 53 is parallel to the inclined end side surface of the upper module 4; a locking convex 23 matching the locking groove 53 is provided on the side of the lower module 2, and an avoidance guide angle 54 is provided at the lower end of the push block 5.

[0026] The cooperation of the upper module 4 and the lower module 2 realizes the first bending action; further, the up and down movement of the lower module 2 drives the rotation of the push block 5 to realize the second bending action and reset. The present application realizes bending by tilting the upper module 4 and the lower module 2 instead of bending by vertically lowering them, thus avoiding the bending mold from interfering with the workpiece and causing damage. Similarly, the second bending is performed by the push block 5 from the side in an inclined direction to avoid interference and damage to the workpiece surface.

[0027] Furthermore, the springs 3 are evenly distributed between the base 1 and the lower module 2 .

[0028] The spring 3 provides power for the reset of the lower module 2 .

[0029] Furthermore, at least one side of the base 1 and the lower module 2 is provided with a guide hole 31 , and the spring 3 is arranged in the guide hole 31 .

[0030] The guide hole 31 plays a guiding role for the spring 3 .

[0031] Furthermore, a guide rod 32 is provided in the guide hole 31 , and the spring 3 is sleeved on the guide rod 32 .

[0032] The guide hole 31 provides a guide function for the spring 3 and the guide rod 32 , while the guide rod 32 provides a guide function for the movement of the lower module 2 .

[0033] Furthermore, the angle between the lower end surface of the locking groove 53 and the horizontal direction is 45°.

[0034] Makes the rotational force more uniform.

[0035] Furthermore, the angles of the locking groove 53 and the locking protrusion 23 are both rounded.

[0036] Avoid direct damage to the lower module 2 and the push block 5.

[0037] During processing, first place the product on the right-angle groove 22 of the lower module 2, and then push the upper module 4 downward through the bending machine. After the upper module 4 and the lower module 2 come into contact, the first bend is formed. The bending simultaneously pushes the lower module 2 downward, and the lower module 2 pushes the locking groove 53 of the push block 5 downward through the locking protrusion 23. When the push block 5 is pushed by the lower module 2, the upper end surface of the locking groove 53 pushes the PC to the left to form a second bend. At this time, the product bending is completed, and then the upper module 4 is lifted, and the spring 3 in the base 1 pushes the lower module 2 back to its original position, and the push block 5 is reset under the push of the upper end of the lower module 2 on the upper end surface of the locking groove 53.

[0038] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A U-shaped groove bending mechanism of a bending machine, characterized in that: The cam is provided with a V-shaped right-angle groove, and the lower end of the upper module is inclined toward the upper step groove and matched with the right-angle groove; a convex shaft is provided in the upper step groove, and an axial groove is provided on the corresponding push block, the convex shaft is rotatably connected with the axial groove, a rotation gap is provided between the push block and the upper step groove away from the lower module side, and the push block is rotatably arranged in the upper step groove; a locking groove is provided on the side of the push block near the lower module, and the upper end face of the locking groove is parallel to the inclined end side face of the upper module; a locking convex matching the locking groove is provided on the side of the lower module, and a clearance guide angle is provided at the lower end of the push block.

2. The U-shaped groove bending mechanism of a bending machine according to claim 1, characterized in that: The springs are evenly distributed between the base and the lower module.

3. The U-shaped groove bending mechanism of a bending machine according to claim 1, characterized in that: A guide hole is provided on at least one side of the base and the lower module, and the spring is arranged in the guide hole.

4. The U-shaped groove bending mechanism of a bending machine according to claim 3, characterized in that: A guide rod is arranged in the guide hole, and the spring is sleeved on the guide rod.

5. The U-shaped groove bending mechanism of a bending machine according to claim 1, characterized in that: The included angle between the lower end surface of the clamping groove and the horizontal direction is 45°.

6. A U-shaped groove bending mechanism of a bending machine according to claim 1 or 5, characterized in that: The angles of the locking groove and the locking protrusion are both rounded.

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