Telescopic protection device for finish turning end face of shaft part

Abstract

The utility model provides a telescopic protection device for the finish turning end face of a shaft part, belongs to the technical field of part machining tools, and achieves stable clamping of a stepped shaft part by designing a part clamping jaw, a part clamping chuck and the layout mode of the part clamping jaw and the part clamping chuck. Meanwhile, the protective sleeve is directly fixed to the first-order machining step face of the stepped shaft part, the machined surface can be effectively covered and protected in the second-order machining process, the situation that a cutting tool makes direct contact with the completed precise surface is avoided, and the risk that the machined part is damaged is greatly reduced. Due to the combination of the protective sleeve and the spring, large cutting depth and cutting feed can be adopted during secondary machining, and conservative machining parameters adopted due to the fact that a machined face is damaged do not need to be worried about, so that the time needed by machining and the number of tool paths are remarkably reduced, and the overall machining efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of parts processing tooling, and in particular relates to a retractable protective device for the precision turning end face of a shaft part. Background Art

[0002] One type of parts produced by our company is stepped shaft parts, which need to be processed at both ends. When one end is processed in the first sequence and then the other end is processed in the second sequence, due to the characteristics of the processed parts, there are multiple steps on the other end, and the length of each step is less than 3mm. After the second sequence processing is completed, the parts are removed from the equipment. There is no gripping space, and the part end can only be moved outward when clamping the part. Since the processed surface is mostly exposed and the material itself is soft, the chips can easily damage the processed surface, resulting in unqualified quality. In order to avoid damaging the processed surface, it can only be processed with very small processing parameters, with small cutting depth and feed amount, many processing tools, low processing efficiency, and cannot give full play to the processing performance of the equipment and meet the processing requirements.

[0003] Currently, when clamping parts, an operator needs to manually install the parts to be processed in a clamping device, and keep the large cross-section of the parts a certain distance away from the clamping device to facilitate manual grasping of the parts for part processing. However, due to the large exposure of the processed surface, chips can easily damage the processed surface, resulting in unqualified quality. In order to avoid damaging the processed surface, processing can only be carried out with very small processing parameters, small cutting depth and cutting feed, large number of processing tools, and low processing efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a retractable protection device for the end face of a shaft part, so as to solve the technical problems that the processed parts are not protected when the parts need to be processed in the second sequence, the processing efficiency is low, and the production needs cannot be met.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A retractable protective device for the end face of a shaft part precision turning includes a clamping part clamping part claw, multiple clamping part claws form a clamping component, a stepped shaft part is placed between the clamping part claws, a protective cover is fixed on the first-order processed step surface of the stepped shaft part, and there is a spring on the protective cover.

[0007] The clamping part claws are fixed on the clamping part chuck.

[0008] The chuck for clamping parts has a circular structure.

[0009] The clamping part claws are evenly distributed on the clamping part chuck around the center of the clamping part chuck.

[0010] The clamping part claws are arranged on the clamping part chuck along the radius track of the clamping part chuck.

[0011] A clamping ring is fixed on the outer periphery of the second-order machined surface of the stepped shaft part.

[0012] The side section of the clamping ring is an inverted T-shaped structure.

[0013] The installation position of the clamping ring is close to the connection between the first-order processing step and the second-order processing step of the stepped shaft part.

[0014] The spring is located between the clamping ring and the protective sleeve.

[0015] The clamping ring and the protective sleeve can be replaced according to the size of the stepped shaft part.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The utility model discloses a retractable protective device for the end face of a shaft-type part for fine turning. By designing the clamping claws, the clamping chuck and their layout, a stable clamping of the stepped shaft part is achieved. At the same time, the protective sleeve is directly fixed to the first-order processing step surface of the stepped shaft part, which can effectively cover and protect the processed surface during the second-order processing, avoiding direct contact of the cutting tool with the completed precision surface, and greatly reducing the risk of damaging the processed part. The combination of the protective sleeve and the spring allows for a larger cutting depth and feed amount to be used during the second-order processing, without the need to adopt conservative processing parameters for fear of damaging the processed surface as in the past. This significantly reduces the time required for processing and the number of tool paths, thereby improving the overall processing efficiency. This structure can ensure that the part will not deviate or vibrate during the fine turning process, thereby improving the processing accuracy. The evenly distributed and radially arranged jaws ensure the balance of the clamping force, reduce stress concentration on the part, and protect the processed surface from damage.

[0018] Furthermore, the introduction of the clamping ring, especially its inverted T-shaped structure, increases the contact area with the stepped shaft part, providing additional support and stability. Especially during the second-order processing, it can effectively prevent deformation caused by cutting forces and protect the completed first-order processing surface.

[0019] Furthermore, the clamping ring is arranged close to the connection between the first and second processing steps. This position layout ensures that the processed first-order surface is directly protected when the second-order surface is fine-machined, avoiding accidental contact of the cutting tool and thus reducing the risk of damage to the completed process surface.

[0020] Furthermore, the spring is set between the clamping ring and the protective sleeve to form a dynamic buffer system that can adapt to stepped shaft parts of different sizes, while providing necessary elastic feedback during the processing, absorbing vibrations, further protecting the part surface from the impact of cutting forces, and maintaining processing accuracy and surface finish.

[0021] Furthermore, the replaceable design of the clamping ring and protective cover enables automatic loading and unloading, which means that the protective device has good versatility and flexibility and can adapt to stepped shaft parts of different sizes and shapes, reducing the need for special tools, reducing costs, and improving the flexibility and adaptability of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the prior art part clamping process;

[0023] Figure 2 This is the main view of the utility model;

[0024] Figure 3 yes Figure 2 Right view of .

[0025] Explanation of the numbers: 1. Stepped shaft part; 2. Clamping part claw; 3. Clamping part chuck; 4. Clamping ring; 5. Spring; 6. Protective cover. DETAILED DESCRIPTION

[0026] In order to further understand the content of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the embodiments are only for explanation and not for limitation of the present invention.

[0027] See also Figure 1 、 Figure 2 and Figure 3 , a retractable protection device for the end face of a shaft part precision turning, which includes a clamping part chuck 3, which serves as the base of the entire device. Figure 3 As shown in the right view, the clamping part chuck 3 is a circular structure, and clamping part claws 2 are provided at the three-divided radius tracks on the surface of the clamping part chuck 3. A space for placing the stepped shaft part 1 is formed between the three clamping part claws 2, and a clamping ring 4 is fixed on the contact surface between the clamping part claws 2 and the stepped shaft part 1; a protective cover 6 is installed on the outer side surface of the step of the first-order machined surface of the stepped shaft part 1, and a spring 5 is fixed on the side of the protective cover 6 close to the second-order machined surface of the stepped shaft part 1, and the free end of the spring 5 is in direct contact with the clamping ring 4.

[0028] The utility model provides a retractable protective device for the end face of a shaft part. In this embodiment, we will process a specific type of stepped shaft part 1, which has two steps of different diameters and needs to be finished separately. The first order processing of the part has been completed, and it is now ready for the second order processing to improve its surface finish and dimensional accuracy. This device is used to protect the processed part during the second order processing of the part. The device consists of five parts, such as Figure 2 and Figure 3The clamping part claw 2, the clamping part chuck 3, the clamping ring 4, the spring 5 and the protective cover 6 shown in the figure; the clamping part chuck 3 is a circular structure, the clamping part claw 2 is evenly fixed on the clamping part chuck 3, and the clamping part claw 2 is on the clamping part chuck 3 as shown in the figure. Figure 3 The distribution shown in .

[0029] After the first-order processing of the stepped shaft part 1 is completed, the matching clamping ring 4 and protective sleeve 6 are selected according to the size of the stepped shaft part 1. The clamping ring 4 needs to ensure that it fits tightly with the outer diameter of the stepped shaft on the stepped shaft part 1, and the protective sleeve 6 needs to be adapted to the step size of the first-order processed surface of the stepped shaft part 1 to ensure that the stepped shaft part 1 will not damage the processed surface during the processing.

[0030] After the first-order processing of the stepped shaft part 1, several clamping part claws 2 are evenly distributed and fixed on the clamping part chuck 3. In this embodiment, three clamping part claws 2 are used, and the clamping part chuck 3 is a circular structure. The three clamping part claws 2 are set along the three radial tracks of the clamping part chuck 3. The three clamping part claws 2 constitute a clamping component. An appropriate space is left in the middle of the three clamping part claws 2, and the position space is used to accommodate the stepped shaft part 1. The opposite surfaces of the three clamping part claws 2 are the clamping surfaces of the clamping part claws 2. The selected clamping ring 4 is fixed on the outer peripheral surface of the second-order processing surface of the stepped shaft part 1. The fixed position of the clamping ring 4 is close to the connection between the first-order processing step and the second-order processing step of the stepped shaft part 1. The clamping ring 4 can ensure that the clamping force of the clamping part claw 2 on the stepped shaft part 1 is more uniform.

[0031] Fix the protective cover 6 on the step of the first-order machined surface of the stepped shaft part 1, fix the spring 5 on the end surface of the protective cover 6, start the hydraulic pressure (or air source) to control the relative movement of the clamping part jaws 2 until the clamping part jaws 2 clamp the stepped shaft part 1. After the part is clamped, the second-order processing is carried out;

[0032] After the second-order processing of the stepped shaft part 1 is completed, the protective cover 6 is first moved to expose the step of the first-order processed surface of the stepped shaft part 1, and the step of the first-order processed surface of the stepped shaft part 1 is clamped by hand or with fingers, and then the clamping part claws 2 are controlled to move outward to release the stepped shaft part 1 and remove the stepped shaft part 1 to complete the processing of the entire stepped shaft part 1.

[0033] Repeat the above steps when processing the next stepped shaft part 1.

[0034] Further preferably, the device can also be applied to the processing of different types of parts. When in use, it is only necessary to replace the clamping ring 4 and the protective cover 6 that match the parts to be processed, and then repeat the above steps.

[0035] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A retractable protective device for the end face of a shaft part, characterized in that: The invention comprises a clamping part clamping part claw (2), wherein a plurality of clamping part claws (2) form a clamping component, a stepped shaft part (1) is placed between the clamping part claws (2), a protective cover (6) is fixed on a first-order processed step surface of the stepped shaft part (1), and a spring (5) is provided on the protective cover (6).

2. A retractable protection device for the end face of a shaft part according to claim 1, characterized in that: The clamping part claw (2) is fixed on the clamping part chuck (3).

3. A retractable protection device for the end face of a shaft part according to claim 2, characterized in that: The part-holding chuck (3) has a circular structure.

4. A retractable protection device for the end face of a shaft part according to claim 3, characterized in that: The clamping part claws (2) are evenly distributed on the clamping part chuck (3) around the center of the clamping part chuck (3).

5. The retractable protection device for the end face of a shaft part according to claim 4 is characterized in that: The clamping part claws (2) are arranged on the clamping part chuck (3) along a radius track of the clamping part chuck (3).

6. The retractable protection device for the end face of a shaft part according to claim 1, characterized in that: A clamping ring (4) is fixed on the outer periphery of the second-order machined surface of the stepped shaft part (1).

7. A retractable protection device for the end face of a shaft part according to claim 6, characterized in that: The side cross-section of the clamping ring (4) is an inverted T-shaped structure.

8. The retractable protection device for the end face of a shaft part according to claim 7, characterized in that: The mounting position of the clamping ring (4) is close to the connection between the first-order processing step and the second-order processing step of the stepped shaft part (1).

9. The retractable protection device for the end face of a shaft part according to claim 8, characterized in that: The spring (5) is located between the clamping ring (4) and the protective sleeve (6).

10. The retractable protection device for the end face of a shaft part according to claim 9, characterized in that: The clamping ring (4) and the protective sleeve (6) can be replaced according to the size of the stepped shaft part (1).

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