Arc-shaped hook forming device

Abstract

The utility model discloses a kind of arc hook forming devices, belong to mixer accessory machining equipment technical field, including upper die seat plate and lower die seat plate, the lower portion of upper die seat plate is provided with male die, the upper portion of lower die seat plate is provided with female die opposite with male die, the two sides of female die are symmetrically provided with lower die baffle, one rotating disc is hinged between two lower die baffles, rotating disc is between male die and female die, the upper end portion of rotating disc is provided with the arc-shaped die groove for the arc part of forming workpiece, the lower end of male die is provided with the arc-shaped die head matched with arc-shaped die groove, the head and tail ends of workpiece are placed on female die and rotating disc respectively, when upper die seat plate is down, arc-shaped die head extrudes the tail end of workpiece into arc-shaped die groove, until the lower end surface of workpiece head end and the upper end bearing surface of female die are attached, workpiece completes arc hook forming;The utility model solves the problem of low production efficiency of multiple forming processes of existing mixer arc hook.

Description

Technical Field

[0001] This utility model belongs to the technical field of concrete mixer truck parts processing equipment, and relates to a device for one-time forming of a concrete mixer truck arc hook. Background Technology

[0002] In the process of transporting materials such as concrete, the arc hooks on the body and auxiliary structures of mixer trucks are used to fix auxiliary components of the mixing tank and connect safety protection devices, and are key load-bearing components. Due to the complex working environment of mixer trucks, the hooks must withstand the vibration of the mixing tank, the weight of the auxiliary components, and the impact of external forces during transportation. Therefore, the requirements for the forming accuracy, structural strength, and smoothness of the arc surface of the hooks are high. At present, there are many problems with the forming methods of arc hooks for mixer trucks. Manual heating and bending can easily lead to changes in the local material properties of the workpiece, and the bending force is difficult to control, resulting in large deviations in the arc of the formed product and poor dimensional consistency within the same batch of products. Multi-process stamping is cumbersome, requires multiple transfers of the workpiece, has low production efficiency, and tends to cause stress concentration in the workpiece after each stamping, requiring additional stress relief processes and increasing production costs. Utility Model Content

[0003] This invention provides a circular arc hook forming device to solve the problem of low production efficiency due to the multiple forming processes in existing concrete mixer truck circular arc hooks.

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows: It includes an upper mold base plate and a lower mold base plate. A punch is arranged below the upper mold base plate, and a die is arranged above the lower mold base plate opposite to the punch. Lower mold baffles are symmetrically arranged on both sides of the die. A rotating disk is hinged between the two lower mold baffles. The rotating disk is located between the punch and the die. An arc-shaped mold groove for forming the arc portion of the workpiece is opened at the upper end of the rotating disk. An arc-shaped mold head that cooperates with the arc-shaped mold groove is provided at the lower end of the punch. The head and tail ends of the workpiece are placed on the die and the rotating disk respectively. When the upper mold base plate moves downward, the lower end pressing surface of the punch contacts and presses the upper end surface of the workpiece, causing the workpiece to bend downward, driving the rotating disk to rotate towards the die. The arc-shaped mold head squeezes the tail end of the workpiece into the arc-shaped mold groove until the lower end surface of the head end of the workpiece is in contact with the upper end receiving surface of the die, thus completing the arc hook forming of the workpiece.

[0005] A more specific technical solution than the above is that the lower end of the rotary disk is provided with a limiting counterweight block. When the upper mold base plate moves upward to open the mold, the rotary disk begins to rotate back to its original position under the action of the self-weight of the limiting counterweight block until the limiting counterweight block contacts the lower mold baffle, thereby realizing the automatic rotation and reset of the rotary disk.

[0006] Furthermore, the die has a limiting section at the end away from the rotary disk, which is used to limit the head end of the workpiece.

[0007] Furthermore: the lower end pressing surface of the die is an inner arc surface, and the upper end receiving surface of the punch is an outer arc surface, the outer arc surface being adapted to the inner arc surface.

[0008] Furthermore, the lower mold baffle and the rotating disk are hinged together by a rotating shaft.

[0009] Due to the adoption of the above technical solution, this utility model has the following beneficial effects compared with the prior art: Through the coordinated cooperation of the punch, die and rotating disk, the heavy workpiece can be formed into an arc in one pressing process. The arc of the hook is accurate and the size is consistent, which can directly meet the standardized assembly requirements of mixer truck parts. No multiple processing is required, reducing the labor intensity of workers. It not only improves production efficiency, but also avoids stress concentration and material performance damage caused by multiple stamping, and ensures the load-bearing capacity of the hook. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] Figure 2 This is a schematic diagram of the interior of the casing of this utility model.

[0012] In the figure: 1. Upper mold base plate; 2. Punch; 21. Arc-shaped mold head; 3. Lower mold base plate; 4. Die; 41. Limiting section; 5. Lower mold baffle; 51. Rotating shaft; 6. Rotary disk; 61. Arc-shaped mold groove; 7. Limiting counterweight; 8. Workpiece. Detailed Implementation

[0013] The present invention will be further described in detail below with reference to the accompanying drawings and examples: It should be noted in the description that the terms "left" and "right" indicate the orientation or positional relationship based on the orientation or positional relationship 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, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0014] like Figure 1 and Figure 2The arc hook forming device shown includes an upper mold base plate 1 and a lower mold base plate 3. A punch 2 is arranged below the upper mold base plate 1, and a die 4 opposite to the punch 2 is arranged above the lower mold base plate 3. The upper end bearing surface of the die 4 is an inner arc surface, and the lower end pressing surface of the punch 2 is an outer arc surface, which is compatible with the inner arc surface. Lower mold baffles 5 are symmetrically arranged on both sides of the die 4. The two lower mold baffles 5 extend outward to the left end of the die 4. The right end of the die 4 is provided with an upwardly extending limiting section 41. A rotating disk 6 is hinged between the two lower mold baffles 5 through a rotating shaft 51. The rotating disk 6 is located between the punch 2 and the die 4. An arc-shaped mold groove 61 for forming the arc part of the workpiece 8 is opened on the upper right end of the rotating disk 6. A limiting counterweight block 7 is arranged on the lower left end of the rotating disk 6. An arc-shaped mold head 21 that cooperates with the arc-shaped mold groove 61 is arranged on the lower left end of the punch 2.

[0015] In use, the right end of the workpiece 8 is placed against the limiting section 41 of the die 4, and the left end of the workpiece 8 is placed on the rotating disk 6. The upper die plate 1 slowly moves downward, and the lower end pressing surface of the punch 2 contacts and presses the upper end surface of the workpiece 8. The workpiece 8 begins to bend downward, driving the rotating disk 6 to rotate to the right around the rotating shaft 51. The arc-shaped die head 21 squeezes the left end of the workpiece 8 into the arc-shaped die groove 61 until the lower end surface of the right end of the workpiece 8 is in contact with the upper end receiving surface of the die 4. At this time, the lower surface of the arc-shaped die groove 61 and the upper end receiving surface of the die 4 are flush, and the workpiece 8 completes the arc hook forming. After pressing for about 10 minutes, when the upper mold base plate 1 slowly moves upward to open the mold, the rotating disk 6, under the weight of the limiting counterweight block 7, begins to rotate to the left around the rotating shaft 51 to return to its original position. When the lower part of the limiting counterweight block 7 contacts the lower mold baffle 5, the rotating disk 6 automatically rotates and resets. Finally, the formed arc hook is removed from the die 4. In this example, the weight of the limiting counterweight block 7 only needs to be sufficient to make the rotating disk 6 rotate to the left to return to its original position when the mold is opened.

Claims

1. A circular arc hook forming device, characterized in that: The device includes an upper die base plate and a lower die base plate. A punch is disposed below the upper die base plate, and a die is disposed above the lower die base plate opposite to the punch. Lower die baffles are symmetrically disposed on both sides of the die. A rotating disk is hinged between the two lower die baffles. The rotating disk is located between the punch and the die. An arc-shaped die groove for forming the arc portion of the workpiece is opened at the upper end of the rotating disk. An arc-shaped die head that mates with the arc-shaped die groove is disposed at the lower end of the punch.

2. The arc hook forming device according to claim 1, characterized in that: The lower end of the rotating disk is provided with a limit counterweight.

3. The arc hook forming device according to claim 2, characterized in that: The die has a limiting section at the end away from the rotary disk.

4. The arc hook forming device according to claim 3, characterized in that: The lower pressing surface of the die is an inner arc surface, and the upper receiving surface of the punch is an outer arc surface, which is adapted to the inner arc surface.

5. The arc hook forming device according to claim 4, characterized in that: The lower mold baffle and the rotating disk are hinged together by a rotating shaft.

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