Detachable arc striking needle for coating

Abstract

The utility model relates to the field of vacuum coating, in particular to a detachable arc striking needle for coating, which comprises a needle rod and a needle head I, the needle head I is of a V-shaped structure, the bending part of the V-shaped structure is used for arc striking, and the upper part of one end of the needle head I is in threaded connection with the bottom of the needle rod. Compared with the prior art, the V-shaped needle head is additionally arranged at the bottom of the needle rod, the needle head is in contact with a target material through the V-shaped bent part for arc striking, the needle head can be in point contact with the target material, the contact area is reduced, and arc striking is easy; the needle head is in threaded connection with the needle rod, so that the needle head is convenient to replace when burnt out, and materials are saved.

Description

Technical Field

[0001] The utility model relates to the field of vacuum coating, in particular to a detachable arc-starting needle for coating. Background Art

[0002] In multi-arc coating, arc starting involves instantaneously contacting a charged, high-voltage arcing needle with the target, generating an arc at the instant of contact and causing the target surface to fuse into plasma. However, currently used arcing needles are mostly straight rods. Because the arcing needle carries high voltage, the high temperature melts the needle itself when the arc is generated, making it prone to burnout. Burnout requires the entire needle to be replaced, which is inconvenient and wastes material. Straight rod arcing needles, with the top of the needle directly contacting the target surface, have a large single-point contact area, which can easily lead to arc starting failure. Summary of the Invention

[0003] The utility model provides a detachable arc starting needle for coating in order to overcome the deficiencies of the prior art.

[0004] To achieve the above-mentioned purpose, a detachable arc-starting needle for coating is designed, comprising a needle rod and needle head 1. Needle head 1 is a V-shaped structure, and the V-shaped bending part is used for arc starting. The upper end of needle head 1 is connected to the bottom of the needle rod by a thread, and needle head 1 is connected to needle head 2. One end of needle head 1 is provided with a threaded hole 2 facing the side, and needle head 2 is a V-shaped structure. One end of needle head 2 is provided with a screw rod 2 facing the side and screwed into threaded hole 2.

[0005] A threaded hole is provided at the bottom of the needle rod, and a screw rod is provided above one end of the needle head to screw with the threaded hole.

[0006] The V-shaped bending portion of the needle head 1 is provided with an annular protrusion 1.

[0007] The V-shaped bending portion of the second needle head is provided with a second annular protrusion.

[0008] The other end of the needle head 2 is provided with a threaded hole 3 facing the side.

[0009] A fixing hole is provided above the needle rod.

[0010] Compared with the prior art, the utility model has a V-shaped needle head installed at the bottom of the needle rod. The needle head contacts the target material through the V-shaped bending part to strike an arc, which can make point contact with the target material, reduce the contact area, and facilitate arc striking. The needle head is threadedly connected to the needle rod, which is convenient for replacement when the needle head burns out, saving materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the utility model.

[0012] Figure 2 Schematic diagram of the needle bar.

[0013] Figure 3 Schematic diagram of needle one.

[0014] Figure 4 This is a schematic diagram of needle two.

[0015] See also Figure 1-Figure 4 , among which, 1 is the needle rod, 2 is needle head 1, 3 is needle head 2, 4 is the fixing hole, 5 is threaded hole 1, 6 is screw rod 1, 7 is annular protrusion 1, 8 is threaded hole 2, 9 is screw rod 2, 10 is annular protrusion 2, and 11 is threaded hole 3. DETAILED DESCRIPTION

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] like Figure 1-Figure 4 As shown, it includes a needle rod 1 and a needle tip 2. Needle tip 2 has a V-shaped structure, and the V-shaped bend is used for arc initiation. The upper end of needle tip 2 is connected to the bottom of needle rod 1 via a thread. Needle rod 1 is connected to the coating equipment, and the V-shaped bend of needle tip 2 contacts the target material to initiate the arc, which can reduce the contact area between the arc initiation needle and the target material, facilitating arc initiation. Needle tip 2 is threadedly connected to needle rod 1, making it easy to replace needle tip 2 if it burns out.

[0018] The bottom of the needle rod 1 is provided with a threaded hole 5, and a screw 6 is provided above one end of the needle head 2 and screwed into the threaded hole 5. The specific structure of the threaded connection can be to provide a threaded hole at the bottom of the needle rod 1 and a screw above the needle head 2, or to provide a screw at the bottom of the needle rod 1 and a threaded hole above the needle head 2, and the screw screwing into the threaded hole.

[0019] The V-bend of needle tip 2 is provided with an annular protrusion 7. When the V-bend of needle tip 2 contacts the target, a small point of protrusion 7 can contact the target surface, further reducing the contact area and facilitating arc ignition. Multiple protrusions 7 can be provided. Furthermore, the surface of protrusion 7 can be designed with a sharp shape to increase the transient current and facilitate successful arc ignition.

[0020] Needle 1 2 is connected to needle 2 3. One end of needle 1 2 is provided with a threaded hole 2 8 facing the side. Needle 2 3 is a V-shaped structure. One end of needle 2 3 is provided with a screw 2 9 facing the side and screwed into the threaded hole 2 8. Needle 2 3 can be added as needed to increase the arc starting point.

[0021] The V-shaped bend of the needle head 2 3 is provided with an annular protrusion 2 10. The annular protrusion 2 10 of the needle head 2 3 can be set with reference to the annular protrusion 1 7 of the needle head 1 2.

[0022] The other end of the needle head 2 3 is provided with a threaded hole 3 11 facing the side. Another needle head 2 3 can be installed at the threaded hole 3 11, and the number of arc striking points can be increased as needed.

[0023] A fixing hole 4 is provided above the needle bar 1. The fixing hole 4 is used to fix the needle bar 1 to the coating device.

[0024] During use, the upper fixing hole 4 of the needle rod 1 is connected and fixed to the arc-starting mechanism of the coating equipment. The bottom of the needle rod 1 is mounted with a needle head 2 via a threaded connection. Needle heads 2 3 can be installed on the side of needle head 2 as needed, and the number of needle heads 2 3 can be continuously increased. The V-shaped bends of needle heads 1 2 and 2 3 contact the target material to start the arc. The annular protrusions 1 7 and 2 10 further reduce the contact area, making arc starting easier. If one needle head is damaged, the threaded connection can be disconnected and the damaged needle head can be removed and replaced, eliminating the need to replace the entire arc-starting needle.

Claims

1. A detachable arc starting needle for coating, characterized by: The invention comprises a needle rod (1) and a needle head (2), wherein the needle head (2) is a V-shaped structure, the V-shaped bending portion is used for arc striking, the upper end of the needle head (2) is connected to the bottom of the needle rod (1) through a thread, the needle head (2) is connected to the needle head (3), one end of the needle head (2) is provided with a threaded hole (8) facing the side, the needle head (3) is a V-shaped structure, and one end of the needle head (3) is provided with a screw rod (9) facing the side and screwed with the threaded hole (8).

2. The detachable arc starting needle for coating according to claim 1, characterized in that: The bottom of the needle rod (1) is provided with a threaded hole (5), and the upper end of the needle head (2) is provided with a screw (6) which is screwed into the threaded hole (5).

3. The detachable arc starting needle for coating according to claim 1, characterized in that: The V-shaped bending portion of the needle head 1 (2) is provided with an annular protrusion 1 (7).

4. The detachable arc starting needle for coating according to claim 1, characterized in that: The V-shaped bending portion of the second needle (3) is provided with a second annular protrusion (10).

5. The detachable arc starting needle for coating according to claim 1, characterized in that: The other end of the needle head 2 (3) is provided with a threaded hole 3 (11) facing the side.

6. The detachable arc starting needle for coating according to claim 1, characterized in that: A fixing hole (4) is provided above the needle rod (1).

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