Clamping-preventing soft jaw for turning soft material

Abstract

The utility model relates to a kind of soft paw of soft material for turning, belong to production and manufacturing technical field.The utility model uses nylon material as soft paw body and fuze protective sleeve direct large-area contact, uses square steel as support structure, can effectively avoid the injury of fuze protective sleeve, crush, without considering the size of clamping force the influence of the appearance size of part, clamping is more fast, production efficiency is higher;Square steel is used as support column, for internal support of soft paw, and with small interference fit with soft paw, so that clamping stability is better, fuze protective sleeve turning is more smooth, size is more easily controlled, product quality is improved.

Description

Technical Field

[0001] This utility model belongs to the field of manufacturing technology, specifically relating to a soft claw for turning soft materials to prevent pinching injuries. Background Technology

[0002] A certain product's fuse protection sleeve is made of pure aluminum plate 1060 punched and spun. Subsequent machining requires a surface free of bumps and scratches. However, a clamping problem arose during the bottom thickness machining process. According to the process requirements, this process uses an internal mandrel for end face positioning, with external hard jaws clamping the outer diameter 5mm from the opening end face. In actual machining, it was found that due to the soft material, the operator's clamping force was difficult to control. Excessive force would damage the outer diameter; insufficient force would cause unstable clamping, leading to wobbling and scratching of the inner bottom surface during machining. Furthermore, ensuring consistent bottom thickness was difficult, posing challenges to dimensional accuracy in the flanging and shaping processes. Previously, this often resulted in cosmetic repairs or even scrap, hindering production efficiency. Therefore, it is necessary to design a new type of soft jaw for clamping in the production process of this fuse protection sleeve, thereby reducing or avoiding clamping, crushing, and scratching damage to the parts, ensuring product quality, and improving production efficiency. Utility Model Content

[0003] (a) Technical problems to be solved The technical problem to be solved by this utility model is: to design a soft claw for turning soft materials to prevent pinching and scratching of parts, avoid problems such as large-scale pinching, scratching, bumping, and dimensional deviation and poor dimensional consistency, and at the same time improve the production efficiency and product quality of parts.

[0004] To solve the above-mentioned technical problems, this utility model provides a non-pinch soft claw for turning soft materials, including a hard claw 1, a support column 2, a nylon sleeve 3, and fasteners; wherein, the three hard claws 1 are evenly distributed circumferentially; the three support columns 2 are cuboids and are welded and fixed to the three hard claws 1 one by one; the three nylon sleeves 3 are cylinders with square holes in the center, and serve as the three soft claw bodies, respectively fitted onto the three support columns 2 one by one, and are pressed together by fasteners; the three support columns 2 and the corresponding soft claw bodies are interference fit; the three soft claw bodies are evenly distributed circumferentially, and the three of them form a space that can accommodate the fuse protection sleeve 6.

[0005] Preferably, the fastener includes a bolt 4 and a washer 5.

[0006] Preferably, the three support columns 2 have central holes for inserting bolts 4.

[0007] Preferably, a spindle is also provided within the space enclosed by the three soft claw bodies.

[0008] Preferably, the support column 2 is made of square steel.

[0009] Preferably, the material of the soft claw body is nylon 66.

[0010] Preferably, the dimensions of the support column 2 are 22×15×50mm, wherein the 22×15mm dimension matches the square hole size of the nylon sleeve 3.

[0011] Preferably, the arrangement directions of the hard claw 1 and the corresponding support column 2 are perpendicular to each other.

[0012] Preferably, the anti-pinch soft claw can clamp the fuse protective sleeve.

[0013] Preferably, the anti-pinch soft claw is used in the production process of the fuse protective sleeve.

[0014] (III) Beneficial Effects The advantages of this utility model are as follows: (1) Nylon material is used as the soft claw body to directly contact the fuse protective sleeve in a large area. Square steel is used as the support structure, which can effectively avoid the pinching and crushing of the fuse protective sleeve. There is no need to consider the impact of the clamping force on the appearance size of the parts. Clamping is faster and production efficiency is higher.

[0015] (2) Square steel is used as a support column for internal support of the soft claw, and a small interference fit is adopted with the soft claw to make the clamping stability better, the turning of the fuse protection sleeve is smoother, the size is easier to control, and the product quality is improved. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the soft claw assembly of this utility model; Figure 2 This is a schematic diagram of the supporting column; Figure 3 This is a schematic diagram of (nylon) soft claws. Detailed Implementation

[0017] To make the objectives, contents, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0018] This utility model relates to the design of a soft gripper for machining flexible materials, primarily used for clamping the bottom-thickness layer of a fuse protective sleeve (part) during machining. This design prevents extensive clamping, scratching, impacts, and dimensional inconsistencies or out-of-tolerance dimensions from damaging the part, while simultaneously improving production efficiency and product quality. (Reference) Figures 1 to 3The soft claw consists of a hard claw 1, a support column 2, a nylon sleeve 3, a bolt 4, and a washer 5. The three hard claws 1 are evenly distributed circumferentially. The three support columns 2 are cuboids, each welded to one hard claw 1. The three nylon sleeves 3 are cylinders with square holes in their centers, and each soft claw body is fitted onto one support column 2, secured by bolts 4 and washers 5. The three support columns 2 and their corresponding soft claw bodies are interference-fitted. The three soft claw bodies are evenly distributed circumferentially, allowing the fuse protection sleeve 6 to be inserted into the space enclosed by the three components, thus clamping the fuse protection sleeve. The three support columns 2 have central holes for inserting bolts 4. A mandrel is also provided within the space enclosed by the three soft claw bodies.

[0019] During installation, first, machine the support column and soft claw body. The length and width dimensions of the support column should match the square hole of the soft claw body with a small interference fit. Then, place the support column parallel to the width direction of the hard claw, aligning both sides and close to one end. Place the three hard claws and three support columns one-to-one, first spot welding to fix their positions, then performing a full weld around the perimeter to ensure a secure weld. Finally, assemble the nylon sleeve, installing it on the three-jaw chuck and machining it to match the outer circle of the fuse protection sleeve. It is important to note that the soft claw must be re-machined each time it is reinstalled.

[0020] The support column is made of square steel with dimensions of 22×15×50. The 22×15 dimension is matched with the square hole of the nylon sleeve 3 with a small interference fit.

[0021] Nylon 66 was chosen as the material for the nylon sheath, i.e., the pure soft claw. Nylon is an important engineering plastic that can replace wear-resistant parts of mechanical equipment. It has good toughness, strong wear resistance, oil resistance, shock resistance, good tensile and flexural strength, and features low water absorption and good dimensional stability. Nylon 66 has even better mechanical strength, stiffness, heat resistance, wear resistance, and creep resistance, making it more suitable as a material for pure soft claws.

[0022] Work process: Install the soft jaws on the three-jaw chuck and machine the soft jaw clamping surface with the fuse protection sleeve, controlling the gap to within 0.1mm. Clean the soft jaw clamping surface and the inner and outer surfaces of the fuse protection sleeve. Clamp the part, ensuring that the end face of the built-in spindle is in contact with the inner bottom surface of the fuse protection sleeve. After machining, loosen the soft jaws, ensuring that the loosening of the soft jaws is as small as possible. Remove the fuse protection sleeve and re-clamp and machine.

[0023] As can be seen, this utility model is a type of anti-pinch soft claw for turning soft materials. Actual processing verification shows that after machining, the parts are free from pressure, pinching, and scratches. The bottom thickness is easily controlled, with good consistency, and clamping is convenient and quick. Verification was conducted on the production of over 6,000 fuse protective sleeves for a certain product in batches 2021-1 and 2 during the bottom thickness machining process. No appearance problems were found caused by this process during clamping, effectively avoiding numerous pinching and scratching injuries to the parts during machining. The bottom thickness is effectively controlled, with good consistency, improved product quality, faster clamping speed, and increased production efficiency. This utility model has a simple structural design with only three parts, is sturdy and durable, and is easy for operators to install and disassemble, allowing for mass production. This utility model can be directly applied to the production of similar parts, avoiding rework and grinding of parts, reducing operator labor intensity, minimizing unexpected expenses and scrap losses, saving production costs, and possessing certain social benefits. This utility model breaks away from the traditional clamping methods that have long relied on hard claws, steel soft claws, elastic clamping rings, and tooling fixtures. It pioneers a new clamping method that uses soft materials for direct contact and square steel as support columns, employing a completely new pure soft claw. This innovative clamping method provides a new clamping approach for special parts and has significant application and promotion value. The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A type of anti-pinch soft jaw for turning soft materials, characterized in that, It includes hard claws (1), support columns (2), nylon sleeves (3) and fasteners; wherein, the three hard claws (1) are evenly distributed around the circumference; the three support columns (2) are cuboids and are welded and fixed to the three hard claws (1) one by one; the three nylon sleeves (3) are cylinders with square holes in the center, and are fitted onto the three support columns (2) one by one as the three soft claw bodies, and are pressed by fasteners; the three support columns (2) and the corresponding soft claw bodies are interference fit; the three soft claw bodies are evenly distributed around the circumference, and the three form a space that can accommodate the fuse protection sleeve (6).

2. The anti-pinch soft claw as described in claim 1, characterized in that, The fasteners include bolts (4) and washers (5).

3. The anti-pinch soft claw as described in claim 2, characterized in that, The three support columns (2) have central holes for inserting bolts (4).

4. The anti-pinch soft claw as described in claim 1, characterized in that, The space enclosed by the three soft claw bodies also contains a spindle.

5. The anti-pinch soft claw as described in claim 1, characterized in that, The support column (2) is made of square steel.

6. The anti-pinch soft claw as described in claim 1, characterized in that, The soft claw body is made of nylon 66.

7. The anti-pinch soft claw as described in claim 1, characterized in that, The dimensions of the support column (2) are 22×15×50mm, wherein the 22×15mm dimension matches the square hole size of the nylon sleeve (3).

8. The anti-pinch soft claw as described in claim 1, characterized in that, The arrangement directions of the hard claw (1) and the corresponding support column (2) are perpendicular to each other.

9. The anti-pinch soft claw as described in claim 1, characterized in that, This anti-pinch soft claw can hold a fuse protective sleeve.

10. The anti-pinch soft claw as described in claim 1, characterized in that, This anti-pinch soft claw is used in the production process of fuse protective sleeves.

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