Device for finishing protection of coating part

Abstract

The invention discloses a device for finishing protection of a coating part. Comprising a cylindrical body, the top of the tool body is provided with a sinking hole used for containing the head of a to-be-protected part, the bottom of the tool body is axially provided with a conical hole allowing a column body of the to-be-protected part to penetrate through, the top end of the conical hole communicates with the bottom end of the sinking hole through an annular interface, and the hole wall of the sinking hole is symmetrically provided with multiple sets of fixing holes in the axial direction; the head of the part can be locked through the fixing hole in the mode that a threaded hole is matched with a fastener or a plug pin penetrates through a through hole. The device can effectively protect coating parts during finishing, is extremely high in reliability and high in operation speed, and is particularly suitable for protecting head end faces of bolts, pins and other parts in the DLC coating finishing process.

Description

Technical Field

[0001] The present invention relates to the technical field of auxiliary protective tooling for machining, and in particular to a special device for accurately protecting a specific area of ​​a coated part during surface finishing. Background Art

[0002] In the manufacture of precision fasteners, such as bolts for aircraft engines, wear-resistant coatings such as diamond-like carbon (DLC) are often applied to their surfaces. After coating, a finishing treatment is required to reduce surface roughness, minimize stress concentration, and enhance smoothness and gloss. However, the head end face (non-working surface) of the bolt typically does not require coating and is strictly prohibited from being polished. Existing technologies use protective tape, but this method suffers from low efficiency, unreliable protection, adhesive residue, and uneven finishing quality at the interface, making it difficult to meet the high reliability requirements of aviation-grade parts. Summary of the Invention

[0003] In view of the above-mentioned defects, the present invention aims to provide a device for finishing protection of coated parts to solve the problems of low finishing protection efficiency and low reliability in the prior art.

[0004] In order to achieve the above technical objectives, the following technical solutions are adopted: A device for finishing and protecting coated parts includes a tool body, wherein a downward-extending sinking hole is provided on the top of the tool body for accommodating the head of the part to be protected; an upward-extending conical hole is axially provided on the bottom of the tool body for allowing the cylindrical body of the part to be protected to pass through; the top end of the conical hole is connected to the bottom end of the sinking hole to form an annular interface, and the interface is used to fit the non-coated surface of the part to be protected; a plurality of groups of fixing holes are symmetrically arranged on the wall of the sinking hole along its axial direction.

[0005] Furthermore, the multiple groups of fixing holes are distributed in multiple rows along the axial direction of the sinking hole, and each row includes two radially symmetrical fixing holes.

[0006] Furthermore, the fixing hole is a threaded hole, which is used to cooperate with a fastener to firmly lock the part head in the sinking hole from the side.

[0007] Furthermore, the fixing hole is a through hole and is arranged near the top opening of the sinking hole, for allowing the pin to pass through to laterally lock the head of the part placed in the sinking hole.

[0008] Furthermore, the depth of the sinking hole is greater than the height of the head of the part to be protected, ensuring that the end face of the part head is lower than the top opening plane of the sinking hole after locking.

[0009] Furthermore, the top opening diameter of the conical hole is smaller than the bottom opening diameter.

[0010] Furthermore, the interface is provided with a center hole, the diameter of which is consistent with the diameter of the top opening of the conical hole and matches the diameter of the component body, ensuring that the interface completely fits the non-coated surface of the component to achieve protection.

[0011] Furthermore, the tool body is made of high-strength aluminum alloy, stainless steel or tool steel.

[0012] The beneficial effects achieved by the present invention are: The present invention provides a device for finishing and protecting coated parts. Compared with the prior art, a special tool is designed for the finishing of the parts to be protected. The part head is accommodated by a sink hole, the part body is passed through a conical hole, and the part head is locked from the side or horizontal direction through multiple sets of fixing holes, so that the part can be firmly fixed on the tool body, effectively avoiding the loosening and displacement of the part during the finishing process, and ensuring the positioning accuracy of the part; and the multiple sets of fixing holes are distributed in multiple rows along the axial direction of the sink hole, which can adapt to the fixing requirements of part heads of different sizes and has good versatility. The depth of the sink hole is greater than the height of the part head to be protected, so that the end face of the part head is lower than the top orifice plane of the sink hole after locking, avoiding the non-coated surface of the part head from contacting the abrasive during the finishing process, and having a good protection effect. In addition, the setting of the conical hole can achieve complete coverage and finishing of the transition area between the part body and the head by the abrasive during the finishing process, ensuring uniform finishing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be described below with reference to the accompanying drawings.

[0014] Figure 1 It is a schematic diagram of the assembly of the present invention when it is working.

[0015] Figure 2 It is a schematic diagram of the overall structure of the present invention.

[0016] Figure 3 It is a structural schematic diagram of the part to be protected according to the present invention.

[0017] In the figure: 11-part body; 12-part head; 13-part non-coated surface; 2-tool body; 3-sinking hole; 4-conical hole; 5-interface; 6-fixing hole. DETAILED DESCRIPTION

[0018] The following specific embodiments illustrate the embodiments of the present invention. Those skilled in the art can easily understand the other advantages and effects of the present invention from the contents disclosed in this specification. The described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example 1

[0019] like Figure 1-3 As shown, a device for finishing and protecting coated parts includes a tool body 2. The tool body 2 is made of any one of high-strength aluminum alloy, stainless steel or tool steel, and has good strength and corrosion resistance.

[0020] A downward extending sinking hole 3 is provided at the top of the tool body 2 for accommodating the head 12 of the part to be protected. The depth of the sinking hole 3 is greater than the height of the head 12 of the part to be protected, ensuring that the end face of the part head 12 is lower than the top opening plane of the sinking hole 3 after locking.

[0021] The bottom of the tooling body 2 features an upwardly extending conical hole 4, the top diameter of which is smaller than the bottom diameter. This hole is designed to allow the shaft 11 of the component to be protected to pass through. The top of the conical hole 4 connects with the bottom of the sinking hole 3, forming an annular interface 5. This interface 5 is designed to conform to the uncoated surface 13 of the component to be protected. This interface 5 has a center hole with a diameter that matches the top diameter of the conical hole 4 and matches the diameter of the component shaft 11, ensuring that the interface 5 fully conforms to the uncoated surface 13 of the component for protection.

[0022] On the wall of the sinking hole 3 , multiple groups of fixing holes 6 are symmetrically arranged along the axial direction thereof. The multiple groups of fixing holes 6 are distributed in three rows along the axial direction of the sinking hole 3 , and each row includes two radially symmetrical fixing holes 6 .

[0023] When the fixing hole 6 is a threaded hole, it is used to cooperate with a bolt to firmly lock the part head 12 in the sinking hole 3 from the side.

[0024] To use this device, the part head 12 to be protected is placed into the countersunk hole 3, the part shaft 11 is passed through the tapered hole 4, and the uncoated surface 13 of the part is aligned with the interface 5. Then, an appropriate fixing hole 6 is selected based on the height of the part head 12. If the fixing hole 6 is threaded, a bolt is screwed into the threaded hole until the end of the bolt presses against the part head 12. After the fixing is complete, the entire device is placed in a finishing machine for processing. During this process, the uncoated surface 13 of the part is effectively protected, and the shaft 11 and the transition area between it and the part head 12 are completely finished. Example 2

[0025] The difference from Example 1 is that the fixing hole 6 is a through hole and is arranged near the top opening of the sinking hole 3 for the pin to pass through to laterally lock the part head 12 placed in the sinking hole 3.

[0026] To use this device, the part head 12 to be protected is placed into the countersunk hole 3, the part shaft 11 is passed through the conical hole 4, and the uncoated surface 13 of the part is aligned with the interface 5. Then, an appropriate fixing hole 6 is selected based on the height of the part head 12. If the fixing hole 6 is a through hole, a pin is inserted through the through hole to achieve a horizontal locking of the part head 12. After the fixing is completed, the entire device is placed in a finishing machine for processing. During this process, the part's uncoated surface 13 is effectively protected, and the part shaft 11 and the transition area with the part head 12 are completely finished.

[0027] Other aspects of the present invention that are not described in detail are all conventional techniques known to those skilled in the art.

[0028] It should be noted that the terms "comprises," "includes," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements that are inherent to such process, method, article, or apparatus.

[0029] The protection scope of the present invention is not limited to the technical solutions disclosed in the specific implementation methods. Any modifications, equivalent replacements, improvements, etc. made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the present invention.

Claims

1. A device for finishing and protecting coated parts, characterized in that: The tooling body (2) comprises a tooling body (2), wherein a downwardly extending sinking hole (3) is provided on the top of the tooling body (2) for accommodating the head (12) of the part to be protected; a conical hole (4) extending upward is provided axially on the bottom of the tooling body (2) for allowing the column (11) of the part to be protected to pass through; the top end of the conical hole (4) is connected to the bottom end of the sinking hole (3) to form an annular interface (5), and the interface (5) is used to fit the non-coated surface (13) of the part to be protected; and a plurality of fixing holes (6) are symmetrically provided on the wall of the sinking hole (3) along its axial direction.

2. The device for finishing and protecting coated parts according to claim 1, characterized in that: The multiple groups of fixing holes (6) are distributed in multiple rows along the axial direction of the sinking hole (3), and each row contains two radially symmetrical fixing holes (6).

3. The device for finishing and protecting coated parts according to claim 2, characterized in that: The fixing hole (6) is a threaded hole used to cooperate with a fastener to securely lock the part head (12) in the sinking hole (3) from the side.

4. The device for finishing and protecting coated parts according to claim 2, characterized in that: The fixing hole (6) is a through hole and is arranged at a position close to the top opening of the sinking hole (3) for allowing a pin to pass through to laterally lock the part head (12) placed in the sinking hole (3).

5. The device for finishing and protecting coated parts according to claim 1, characterized in that: The depth of the sink hole (3) is greater than the height of the part head (12) to be protected, ensuring that the end face of the part head (12) is lower than the top opening plane of the sink hole (3) after locking.

6. The device for finishing and protecting coated parts according to claim 1, characterized in that: The top opening diameter of the conical hole (4) is smaller than the bottom opening diameter.

7. The device for finishing and protecting coated parts according to claim 6, characterized in that: The interface (5) is provided with a center hole, the diameter of which is consistent with the diameter of the top opening of the conical hole (4) and matches the diameter of the component column (11), ensuring that the interface (5) completely fits the non-coated surface (13) of the component to achieve protection.

8. The device for finishing and protecting coated parts according to claim 1, characterized in that: The tool body (2) is made of high-strength aluminum alloy, stainless steel or tool steel.

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