Device for rapid prototyping of a hook of a tension spring

Abstract

The application discloses a device for rapid forming of a tension spring hook, and is characterized in that the device comprises a rotating clamping block, an extruding block, a tension spring hook mounting block and a handle, the handle is arranged between the upper and lower sleeves of the rotating clamping block through the tension spring hook mounting block, and the upper end of the handle is fixedly connected with the extruding block; wherein the upper end of the tension spring hook mounting block is provided with a slot for clamping one hook end of the tension spring; the extruding block is arranged as a half-cylindrical sleeve structure with a step, and the inner arc surface of the step can clamp a spring coil of the tension spring; the device can make the tension spring hook be processed to a position close to the center line of the spring in a short time, simultaneously reduces the requirement for the skill level of an operator, improves the one-time qualified rate of the tension spring product and shortens the production cycle.

Description

Technical Field

[0001] This invention relates to the field of spring processing equipment technology, and more specifically to a rapid forming device for tension spring hooks in the tension spring hook forming process. Background Technology

[0002] A tension spring, also known as a stretch spring, is a helical spring that withstands axial tensile force. It is widely used in machine tools, automobiles, clutches, valves, and electronic products for motion control, power transmission, and vibration damping. Tension springs typically have hooks machined at both ends. The position of the hooks relative to the spring's centerline, the radius of the hooks, and the relative position between the two hooks usually have relatively strict dimensional and positional tolerance requirements. Additionally, the gap of the first coil at the end of the tension spring also has corresponding tolerance requirements.

[0003] In traditional manufacturing processes, the forming of tension spring hooks primarily relies on manual labor: first, the hook at one end of the tension spring is secured, then tools such as flat chisels and copper hammers are used to tap along the starting point of the hook, gradually aligning the hook position with the center line of the spring. Finally, it is adjusted with pliers to meet design requirements. For tension springs that are small in size or have a thicker wire diameter, this process is not only time-consuming and labor-intensive but also requires a high level of skill from the operators.

[0004] During the manual hammering process, especially for tension springs with smaller wire diameters, the hook and spring body are prone to deformation or even breakage, resulting in a low first-pass yield. For tension springs with larger wire diameters, hook forming and clamping time often reaches ten minutes or even longer, which seriously affects the production cycle and manufacturing costs.

[0005] Therefore, how to provide a device that is simple in structure, easy to operate, reduces the difficulty of operation, and shortens the forming time of the tension spring hook has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a device for rapid prototyping of tension spring hooks. This device enables tension spring hooks to be processed to a position close to the center line of the spring in a short time, while reducing the skill requirements of the operator, improving the first-pass yield of tension spring products, and shortening the production cycle.

[0007] To achieve the above objectives, the present invention employs the following technical solutions: A device for rapid forming of a tension spring hook, the device comprising a rotating clamping block, an extrusion block, a tension spring hook mounting block and a handle, the handle being rotatably disposed between the upper and lower sleeves of the rotating clamping block via the tension spring hook mounting block, and the extrusion block being fixedly connected to the upper end of the handle; The upper end of the tension spring hook mounting block is provided with a slot for locking one hook end of the tension spring; the compression block is configured as a semi-cylindrical sleeve structure with a step, and the inner arc surface of the step can lock the spring coil of the tension spring.

[0008] Furthermore, one end of the rotating clamping block is configured as a plate structure, and the other end is configured as two coaxial upper and lower cylindrical sleeve structures.

[0009] Furthermore, one end of the handle is configured as a long strip-shaped plate structure, and the other end is configured as a ring structure into which the upper and lower cylindrical sleeves of the rotating clamping block can be inserted.

[0010] Furthermore, the tension spring hook mounting block is configured as a cylindrical structure, with a clearance fit between the cylinder of the tension spring hook mounting block and the ring of the handle, and an interference fit between the cylinder of the tension spring hook mounting block and the rotating clamping block.

[0011] Furthermore, the size of the slot and the overall dimensions of the device are preset according to the specifications of the tension spring to be processed, so as to accommodate the forming of tension spring hooks with different wire diameters and lengths.

[0012] Furthermore, the slot is located on the side of the tension spring hook mounting block that is off-center.

[0013] A method for forming a tension spring hook includes the following steps: S1. Clamp the plate of the rotating clamping block onto the bench vise to fix the device; S2. Vertically insert the hook end of the tension spring to be processed into the slot of the tension spring hook mounting block, and make the tension spring coil lock in the inner arc surface of the step of the extrusion block; S3. By rotating the handle, the compression block is driven to rotate relative to the tension spring hook mounting block, so that the inner arc surface of the step contacts the spring ring and pushes it to rotate relative to the slot. The hook end remains not to rotate under the limiting action of the slot, so that the hook end is close to the center line of the tension spring. S4. After fine-tuning the formed tension spring hook as needed, remove the tension spring from the slot of the tension spring hook mounting block.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. Reduces forming difficulty and improves production efficiency; With the help of the device of this invention, the general forming of the tension spring hook can be completed by turning the handle, saving a lot of repeated hammering and clamping processes, significantly shortening the forming time of the tension spring hook, and increasing production efficiency many times over.

[0015] 2. Improve the first-pass yield; during the forming process, the hook end is fixed by the slot limit, and the spring ring is pushed to rotate by the inner arc surface of the extrusion block step. The force is stable and controllable, which reduces damage to the surface of the spring steel wire, significantly reduces the risk of deformation and breakage, and helps to improve the first-pass yield of tension spring products.

[0016] 3. Reduced reliance on personnel skills: The device is simple and intuitive to operate. Non-spring professionals can quickly form tension spring hooks after simple training, which significantly reduces the requirements for operators' experience and technical level, and is conducive to process standardization and promotion of application.

[0017] 4. Good applicability; by reasonably setting the slot gap size and the overall size of the device, it can adapt to the forming needs of spring hooks with different wire diameters and different specifications, and has strong versatility and promotion value. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a device for rapid prototyping of tension spring hooks.

[0019] Figure 2 This is a disassembled diagram of a device for rapid prototyping of a tension spring hook.

[0020] Figure 3 This is a schematic diagram of the rotating clamping block structure of a device for rapid prototyping of tension spring hooks.

[0021] Figure 4 This is a schematic diagram of the extrusion block structure of a device for rapid prototyping of tension spring hooks.

[0022] Figure 5 This is a schematic diagram of the tension hook mounting block structure of a device for rapid prototyping of tension hooks.

[0023] Figure 6 This is a schematic diagram of the handle structure of a device for rapid prototyping of a tension spring hook.

[0024] In the diagram: 1-Rotating clamping block; 2-Extrusion block; 3-Tension spring hook mounting block; 4-Handle. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings.

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0027] Example 1: like Figures 1-6 As shown, A device for rapid prototyping of tension spring hooks includes a rotating clamping block, an extrusion block, a tension spring hook mounting block, and a handle. The handle is rotatably positioned between the upper and lower sleeves of the rotating clamping block via the tension spring hook mounting block, and the extrusion block is fixedly connected to the upper end of the handle. The upper end of the tension spring hook mounting block has a slot for locking one hook end of the tension spring; the compression block is set as a semi-cylindrical sleeve structure with a step, and the inner arc surface of the step can lock the spring coil of the tension spring.

[0028] The slot is located on the side of the tension spring hook mounting block that is off-center. When the hook end of the tension spring is inserted into the slot and the tension spring coil is engaged with the inner arc surface of the pressing block step, the handle is turned to make the pressing block rotate. During the rotation, the pressing block engages with the tension spring coil and pushes the tension spring to rotate. The hook end remains basically not rotated with the tension spring under the limiting action of the slot, so that the relative position of the hook end with the tension spring coil changes. One end of the rotating clamping block is a plate structure used to fix the device on a vise or tooling; the other end is a coaxial upper and lower cylindrical sleeve structure used to provide a basis for the device to rotate.

[0029] One end of the handle is a long strip-shaped plate structure, and the other end is a ring structure into which the upper and lower cylindrical sleeves of the rotating clamping block can be inserted, which is used to drive the extrusion block to rotate relative to the tension spring hook mounting block.

[0030] The tension spring hook mounting block is designed as a cylindrical structure. The cylinder of the tension spring hook mounting block and the ring of the handle are fitted with a clearance fit, while the cylinder of the tension spring hook mounting block and the rotating clamping block are fitted with an interference fit. The two positions use different fit methods to ensure that when the spring ring rotates relative to the hook, the tension spring hook mounting block will not rotate with it.

[0031] The slot size and overall dimensions of the device are pre-set according to the specifications of the tension spring to be processed, so as to accommodate the forming of tension spring hooks with different wire diameters and lengths.

[0032] Example 2: Based on Embodiment 1, the specific usage method of the device of the present invention will be further described. The usage method is as follows: S1. Clamp the gripping part of the rotating clamping block 1 onto the bench vise to reliably fix the entire device; S2. Insert the hook end of the tension spring to be processed vertically into the slot of the tension spring hook mounting block 3 from top to bottom, so that the hook end is limited by the slot and the tension spring coil is engaged with the inner arc surface of the step of the extrusion block 2. S3. After the above preparations are completed, the operator holds the handle 4 and rotates the handle 4 in a predetermined direction, thereby driving the extrusion block 2 to rotate around the pivot on the rotating clamping block 1. During the rotation of the extrusion block 2, the inner arc surface of the extrusion block step gradually contacts the outer side of the tension spring coil and generates extrusion force, pushing the tension spring coil to rotate relative to the slot. Since the tension spring hook end is limited by the slot and cannot rotate with the spring coil, the spatial position of the hook end relative to the spring coil gradually changes while the tension spring coil is pushed to rotate by the extrusion block 2, until the hook end is shaped to a position close to the center line of the tension spring.

[0033] S4. After completing the above rotation and pressing action, the operator can make minor adjustments to the hook as needed to ensure that the straightness of the hook and its position relative to the center line of the spring meet the design tolerance requirements. Then, the tension spring is removed from the slot, thus completing the rapid forming of one end of the hook. The other end of the hook can be processed in the same way.

[0034] In applications with springs of different specifications, the dimensions of the spring hook mounting block 3 and the gap size of the slot can be designed according to the diameter of the spring wire and the outer diameter of the spring to ensure that the hook can be reliably positioned and easy to install and remove after being inserted into the slot. At the same time, the dimensions of the extrusion block 2 and the curvature of the inner arc surface of the extrusion block step can be adjusted as needed to adapt to the forming requirements of springs with different outer diameters, thereby improving the applicability of the device of the present invention.

[0035] This invention is not limited to the specific embodiments described above. The invention extends to any new feature or combination disclosed in this specification, as well as any new method or process step or combination disclosed herein.

Claims

1. A device for rapid forming of a tension spring hook, characterized in that: The device includes a rotating clamping block, a pressing block, a tension spring hook mounting block, and a handle. The handle is rotatably disposed between the upper and lower sleeves of the rotating clamping block via the tension spring hook mounting block, and the pressing block is fixedly connected to the upper end of the handle. The rotating clamping block has a plate structure at one end and two coaxial cylindrical sleeve structures at the other end. The tension spring hook mounting block is a cylinder, and its cylinder is interference-fitted with the rotating clamping block. The upper end of the tension spring hook mounting block is provided with a slot for limiting the end of the tension spring hook. The extrusion block is a semi-cylindrical sleeve structure with a step. The inner arc surface of the step is suitable for engaging with the outer side of the spring coil of the tension spring and applying force to it when the handle is rotated, thereby pushing the spring coil to rotate relative to the slot. One end of the handle is configured as a long strip-shaped plate structure, and the other end is provided with an annular rotating shaft that can be inserted into the upper and lower cylindrical sleeves and is coaxial with them. The annular rotating shaft and the cylinder of the tension spring hook mounting block are in clearance fit. The size of the slot and the overall dimensions of the device are preset according to the specifications of the tension spring to be processed, so as to accommodate the forming of tension spring hooks with different wire diameters and lengths, and the slot is located on the side of the tension spring hook mounting block that is off-center; The method for forming the tension spring hook applicable to the device includes the following steps: S1. Clamp the plate of the rotating clamping block onto the bench vise to fix the device; S2. Vertically insert the hook end of the tension spring to be processed into the slot of the tension spring hook mounting block, and make the tension spring coil lock in the inner arc surface of the step of the extrusion block; S3. By rotating the handle, the pressing block is driven to rotate relative to the tension spring hook mounting block, so that the inner arc surface of the step of the pressing block contacts the tension spring coil and pushes the tension spring to rotate. While the tension spring coil rotates, the hook end remains stationary under the limiting action of the slot, so that the hook end is close to the center line of the tension spring. S4. After fine-tuning the formed tension spring hook as needed, remove the tension spring from the slot of the tension spring hook mounting block.

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