Spring high-precision straightening device

Abstract

The utility model discloses a spring high accuracy straightening device relates to spring processing equipment technical field, including frame, the surface sliding connection of frame has the pressing plate, the top of frame is provided with the hydraulic cylinder for driving the sliding of pressing plate, the side wall fixed connection of frame has the control mechanism for controlling the hydraulic cylinder, is provided with the straightening subassembly on the frame, and the surface of pressing plate is equipped with the guide slot, and the two inner side walls of guide slot all are equipped with the limit sliding slot, and the inside of guide slot is provided with two limit subassembly, and the rotation of pressing plate is connected with the adjusting assembly, in the process of straightening, make spring clamping between two limit clamps, the recess is used for the convex of the adapter expansion board, and two limit clamps will be held in limit spring, avoid the deviation of spring to left and right sides in the process of pressing plate pressing, make its straightening position deviation, influence straightening accuracy and result, solved the device of existing not setting limit structure, the problem that spring is easy because of unbalanced force makes the straightening position deviation when straightening.

Description

Technical Field

[0001] This utility model relates to the field of spring processing equipment technology, and in particular to a high-precision spring straightening device. Background Technology

[0002] The processing technology of helical springs includes the following steps: winding spring steel rods, grinding and finishing the ends of helical springs, heat treating semi-finished springs, and inspecting finished springs before they leave the factory.

[0003] After the spring is wound, in order to eliminate the internal stress of the spring, it needs to be pressed into a compressed state, so that the spring undergoes partial plastic deformation to offset the internal stress. Then, the compressed spring is heat-treated to form the finished spring.

[0004] Because the stress distribution inside the spring is not uniform, the pitch between the coils of the spring after compression may be unequal, which leads to a decrease in the performance of the spring after heat treatment. The pitch between different parts of adjacent coils may also be unequal, causing the spring to bend. Therefore, the spring is usually calibrated after compression.

[0005] Currently, there is an existing spring straightening machine, disclosed in CN115365428B, which includes a frame, a pressure plate slidably mounted on the frame, a drive mechanism for driving the pressure plate to slide on the frame, a control mechanism for controlling the start and stop of the drive mechanism, and a worktable on the frame. On the worktable is an unfolding mechanism that works in conjunction with the pressure plate to adjust the spring pitch. This application describes a method where the spring is placed on the unfolding mechanism on the worktable, and then the control mechanism activates the drive mechanism to drive the pressure plate to slide and push the spring toward the unfolding mechanism. The unfolding mechanism unfolds the two coils of the spring to adjust the spring pitch. Compared to manually hammering in wedges, this method offers more stable unfolding and higher spring straightening efficiency.

[0006] During the implementation of the existing technical solution, at least the following technical problems were found:

[0007] The existing device can adjust the angle between the two extension plates by rotating the second gear. The angle between the two extension plates, together with the pressure plate, expands the pitch of the spring, thus straightening the bent spring. However, when using the existing device, the degree of bending or the position of deformation of the spring may be inconsistent. When the pressure plate is pressed, the part with a greater degree of bending may require more force or a longer stroke to be straightened. This will generate unbalanced stress inside the spring, pushing the spring to move in a certain direction, causing the spring to deviate from the worktable and slide away, resulting in straightening failure. Utility Model Content

[0008] To address the shortcomings of existing technologies, this utility model provides a high-precision spring straightening device, which solves the problem that existing devices do not have a limit structure, and the spring is prone to deviation of the straightening part due to unbalanced force during straightening.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A high-precision spring straightening device includes a frame, a pressure plate slidably connected to the surface of the frame, a hydraulic cylinder for driving the pressure plate to slide on the top surface of the frame, a guide groove on the surface of the pressure plate, limit grooves on both inner sidewalls of the guide groove, two limit components on the inner side of the guide groove, an adjustment component rotatably connected to the pressure plate, the adjustment component including a double-threaded screw and a handwheel, the double-threaded screw being rotatably connected to the pressure plate, the threaded section of the double-threaded screw being located inside the guide groove, the double-threaded screw, also known as a double-lead screw or double-ended screw, is a special type of transmission screw, its thread structure having two helical lines, i.e., two starting points, the two helical lines being symmetrically distributed based on the center point of the guide groove, the limit component including a slider, limit blocks fixedly connected to both sidewalls of the slider, and a limit clamping plate fixedly connected to the bottom of the slider.

[0011] Preferably, the limiting clamp has a groove, and a ball nut is fixedly installed at the axis of the slider.

[0012] Preferably, the end of the double-threaded screw away from the pressure plate is fixedly connected to the handwheel, and the end of the double-threaded screw away from the pressure plate is equipped with a holding brake. The brake wheel of the holding brake is fixedly connected to the double-threaded screw, and the friction plate, brake arm and operating lever are fixedly connected to the pressure plate to prevent the double-threaded screw from being accidentally rotated by the ball nut.

[0013] Preferably, the slider is connected to the double-threaded screw via ball nuts, and the two ball nuts are respectively connected to the two threads of the double-threaded screw.

[0014] Preferably, the slider is slidably connected to the inside of the guide groove.

[0015] Preferably, the two limiting blocks are slidably connected to the two limiting grooves respectively.

[0016] Preferably, both limiting clamps are located directly above the straightening assembly.

[0017] Preferably, the grooves in the two limiting clamps are located directly above the expansion plate.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] During the straightening process, the spring is clamped between two limiting plates. The groove is used to adapt to the protrusion of the extension plate. The two limiting plates clamp and restrict the spring, preventing it from deviating to the left or right sides during the pressing process of the pressure plate, which would cause the straightening position to shift and affect the straightening accuracy and result. This solves the problem that existing devices do not have a limiting structure, and the spring is prone to deviation of the straightening part due to unbalanced force during straightening. Attached Figure Description

[0020] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a bottom view of the pressure plate and limiting assembly of this utility model;

[0023] Figure 3 This is an exploded view of the limiting component and the adjusting component of this utility model;

[0024] Figure 4 This is a top view of the pressure plate structure of this utility model.

[0025] Legend: 1. Frame; 2. Pressure plate; 3. Hydraulic cylinder; 4. Control mechanism; 5. Straightening assembly; 6. Guide groove; 7. Limiting slide; 8. Double threaded screw; 9. Handwheel; 10. Slider; 11. Limiting block; 12. Limiting clamp; 13. Groove; 14. Ball nut. Detailed Implementation

[0026] This application provides a high-precision spring straightening device, which effectively solves the problem that existing devices do not have a limit structure, and the spring is prone to deviation of the straightening part due to unbalanced force during straightening.

[0027] Example

[0028] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the technical solution in this embodiment effectively solves the technical problem that existing devices do not have a limit structure, and the spring is prone to deviate from the straightening part during straightening due to unbalanced force. The overall idea is as follows:

[0029] To address the problems existing in the prior art, this utility model provides a high-precision spring straightening device, including a frame 1. A pressure plate 2 is slidably connected to the surface of the frame 1. A hydraulic cylinder 3 for driving the pressure plate 2 to slide is provided on the top surface of the frame 1. A guide groove 6 is formed on the surface of the pressure plate 2. Limiting grooves 7 are formed on both inner side walls of the guide groove 6. Two limiting components are provided inside the guide groove 6. An adjusting component is rotatably connected to the pressure plate 2. The adjusting component includes a double-threaded screw 8 and a handwheel 9. The double-threaded screw 8 is rotatably connected to the pressure plate 2. The threaded section of the double-threaded screw 8 is located inside the guide groove 6. The double-threaded screw 8 is also called a double-lead screw or double-ended screw. It is a special type of transmission screw. Its thread structure has two helical lines, i.e., two starting points. The two helical lines are symmetrically distributed based on the center point of the guide groove 6. The limiting component includes a slider 10. Limiting blocks 11 are fixedly connected to both side walls of the slider 10. A limiting clamping plate 12 is fixedly connected to the bottom of the slider 10.

[0030] The limiting clamp 12 has a groove 13, and a ball nut 14 is fixedly installed at the axis of the slider 10.

[0031] The end of the double-threaded screw 8 away from the pressure plate 2 is fixedly connected to the handwheel 9. The end of the double-threaded screw 8 away from the pressure plate 2 is equipped with a holding brake. The brake wheel of the holding brake is fixedly connected to the double-threaded screw 8. The friction plate, brake arm and operating lever are fixedly connected to the pressure plate 2 to prevent the double-threaded screw 8 from being accidentally rotated by the ball nut 14.

[0032] The slider 10 is threadedly connected to the double-threaded screw 8 via ball nuts 14, and the two ball nuts 14 are respectively connected to the two threads of the double-threaded screw 8.

[0033] The slider 10 is slidably connected to the inside of the guide groove 6.

[0034] The two limit blocks 11 are slidably connected to the two limit grooves 7 respectively.

[0035] Both limiting clamps 12 are located directly above the straightening assembly 5.

[0036] The grooves 13 of the two limiting clamps 12 are both located directly above the extension plate.

[0037] Frame 1: Serves as the basic framework of the entire device, providing support for the installation of various components.

[0038] Pressure plate 2: Slides under the drive of hydraulic cylinder 3 to press the spring to achieve straightening.

[0039] Hydraulic cylinder 3: Drives the pressure plate 2 to slide on the surface of the frame 1, providing power to compress the spring.

[0040] Control mechanism 4: Fixed to the side wall of frame 1, used to control the operation of hydraulic cylinder 3.

[0041] Straightening component 5: Set on frame 1, including unfolding mechanism, drive mechanism and fixing parts, which work with pressure plate 2 to achieve spring straightening.

[0042] Guide groove 6: It is formed on the surface of pressure plate 2 to provide space for the installation and sliding of the limiting component.

[0043] Limiting groove 7: It is formed on the two inner side walls of the guide groove 6 and cooperates with the limiting block 11 of the slider 10 to limit the sliding direction of the slider 10.

[0044] Double threaded screw 8: Rotatably connected to pressure plate 2, the rotation drives the two ball nuts 14 and slider 10 to move closer or further apart.

[0045] Handwheel 9: Fixed at the end of the double threaded screw 8 away from the pressure plate 2, used for manually rotating the double threaded screw 8.

[0046] Slider 10: Located inside the guide groove 6, it is fixedly connected to the ball nut 14 and slides under the drive of the double threaded screw 8, thereby moving the limit clamp 12.

[0047] Limiting block 11: Fixed to the two side walls of slider 10, and slidably connected to limiting groove 7 to limit the sliding direction of slider 10.

[0048] Limiting clamp 12: Fixed to the bottom of slider 10, used to clamp the spring and prevent it from shifting left and right when straightening. Its angle makes it easy for the spring to enter. The groove 13 is adapted to the protrusion of the extension plate.

[0049] Groove 13: It is formed on the side of the limiting clamp 12 away from the slider 10, and is used to accommodate the protrusion of the extension plate.

[0050] Ball nut 14: Fixed at the axis of slider 10, threadedly connected to double threaded screw 8, converting the rotational motion of double threaded screw 8 into the linear motion of slider 10.

[0051] Working principle:

[0052] In the first step of this application, the hydraulic cylinder 3 is controlled by the control mechanism 4 to push the pressure plate 2 to slide on the surface of the frame 1. During the sliding process, the pressure plate 2 presses the spring. The part of the spring with a shorter pitch is squeezed and amplified by the expansion plate, so that the bending caused by the abnormal pitch is straightened.

[0053] The second step involves clamping the spring between two limiting plates 12 during the straightening process. The groove 13 is used to accommodate the protrusion of the extension plate. The two limiting plates 12 clamp and restrict the spring, preventing it from deviating to the left or right during the pressing process of the pressure plate 2, which would cause the straightening position to shift and affect the straightening accuracy and result. This solves the problem that existing devices do not have a limiting structure, and the spring is prone to deviating from the straightening position due to unbalanced force during straightening.

[0054] Thirdly, in this application, the double threaded screw 8 can be rotated by the handwheel 9 to bring the two limiting components closer or further apart, so that the two limiting components can clamp springs of different sizes. If it is a larger spring, the two limiting components can clamp the top of the spring, which can also play a limiting role, making this application highly applicable.

[0055] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A high-precision spring straightening device, comprising a frame (1), wherein a pressure plate (2) is slidably connected to the surface of the frame (1), and a hydraulic cylinder (3) for driving the pressure plate (2) to slide is provided on the top surface of the frame (1), characterized in that, The surface of the pressure plate (2) is provided with a guide groove (6), and the two inner sidewalls of the guide groove (6) are provided with limit grooves (7). Two limit components are provided inside the guide groove (6), and the pressure plate (2) is rotatably connected with an adjustment component. The adjustment assembly includes a double-threaded screw (8) and a handwheel (9). The double-threaded screw (8) is rotatably connected to the pressure plate (2). The threaded section of the double-threaded screw (8) is located inside the guide groove (6). The limiting component includes a slider (10), with limiting blocks (11) fixedly connected to both side walls of the slider (10), and a limiting clamp (12) fixedly connected to the bottom of the slider (10).

2. The high-precision spring straightening device as described in claim 1, characterized in that: The limiting clamp (12) has a groove (13), and a ball nut (14) is fixedly installed at the axis of the slider (10).

3. The high-precision spring straightening device as described in claim 2, characterized in that: The end of the double-threaded screw (8) away from the pressure plate (2) is fixedly connected to the handwheel (9).

4. The high-precision spring straightening device as described in claim 3, characterized in that: The slider (10) is threadedly connected to the double-threaded screw (8) via a ball nut (14).

5. The high-precision spring straightening device as described in claim 4, characterized in that: The slider (10) is slidably connected to the inside of the guide groove (6).

6. The high-precision spring straightening device as described in claim 5, characterized in that: The two limiting blocks (11) are slidably connected to the two limiting grooves (7) respectively.

7. A high-precision spring straightening device as described in claim 6, characterized in that: Both of the aforementioned limiting clamps (12) are located directly above the straightening assembly (5).

8. The high-precision spring straightening device as described in claim 7, characterized in that: The grooves (13) on the two limiting clamps (12) are located directly above the extension plate.

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