Magnetic positioning coating clamp suitable for hemispherical parts

Abstract

The utility model discloses a magnetic positioning coating clamp suitable for hemispherical parts, belongs to the technical field of medical instruments, and is applied to the field of coating procedures of optical products. The utility model discloses a magnetic positioning coating clamp suitable for hemispherical parts. The magnetic positioning coating clamp comprises a micro magnet, a coating ring and a coating ring limiting cover, the micro-magnets comprise a first micro-magnet and a second micro-magnet; a first micro magnet is arranged on the upper surface of the coating ring; a convex edge is inwards arranged at the bottom end of the coating ring; a first clamping groove is formed in the lower right portion of the film coating ring. A film coating ring limiting cover is arranged above the film coating ring; a second clamping groove is formed in the coating ring limiting cover, and the second clamping groove is matched with the coating ring and movably covers the coating ring in a semi-embedded manner; and a second micro-magnet which is opposite to the first micro-magnet in position and attracts the first micro-magnet is arranged in the second clamping groove. According to the utility model, the hemisphere parts are stably fixed in the coating clamp, so that the hemisphere parts cannot deviate during coating, the coating qualification rate of the hemisphere parts is increased, and the working efficiency of the coating process is improved.

Description

Technical Field

[0001] The utility model discloses a magnetic positioning coating fixture suitable for hemispherical parts, which belongs to the technical field of optical thin films and is applied to the coating process field of optical products. Background Art

[0002] The traditional coating fixture is clamped by rigidly fitting the parts and the ribs for positioning, which is equivalent to the slot clamping. The parts are clamped on the ribs, and the parts are in a stable state on the coating positioning cavity. The coating fixture with the clamped parts is installed on the coating umbrella plate, so that the parts to be plated are suspended. However, the ribs of the coating fixture are in contact with the parts. Due to the thermal expansion coefficient, the parts will expand and contract due to heat, causing the edges of the parts to contact the ribs of the coating fixture and break the edges; on the other hand, the parts are rigidly fitted with the ribs of the coating fixture, which affects the finish during coating. In order to ensure that each part is evenly coated, the coating umbrella plate is designed in an arc shape, and the umbrella frame is rotated to perform the coating operation. However, during the coating process, the high-speed rotation of the umbrella frame will cause the parts in the coated furniture to shake or even fall off. When coating hemispherical parts, due to the large protrusion of the surface to be coated, the large spherical sagitta and the unstable center of gravity, the coating fixture edge clamping and positioning is difficult to keep the parts absolutely positioned reliably under the action of their own gravity, causing parts to shift in subsequent coating operations, resulting in uneven coating, and there is a risk of parts falling off when the umbrella stand rotates, resulting in a low coating pass rate for hemispherical parts, a large number of scrapped products, and a low working efficiency of the coating process for hemispherical parts. Utility Model Content

[0003] In view of the shortcomings of the prior art, the utility model proposes a magnetic positioning coating fixture suitable for hemispherical parts to solve the problems of rigid fitting between the hemispherical parts and the ribs of the coating fixture, part displacement causing film deviation and shedding, low coating qualification rate, and low work efficiency.

[0004] In order to solve the above technical problems, the technical solution of the utility model is as follows:

[0005] Magnetic positioning coating fixture suitable for hemispherical parts, such as Figures 1-2 As shown, it includes a micro magnet, a coating ring 1 and a coating ring limiting cover 5;

[0006] The micro magnets include a first micro magnet 3 and a second micro magnet 4;

[0007] A first micro magnet 3 is provided on the upper surface of the coating ring 1; a convex edge 8 is provided inwardly at the bottom end of the coating ring 1; and a first slot 2 is provided at the lower right side of the coating ring 1;

[0008] A coating ring limiting cover 5 is provided above the coating ring 1; Figure 3As shown, a second slot 6 is provided on the coating ring limit cover 5, and the second slot 6 matches the coating ring 1 and is movably covered on the top of the coating ring 1 in a semi-embedded manner; a second micro magnet 4 is provided in the second slot 6, which is opposite to the first micro magnet 3 and attracts each other.

[0009] The utility model has achieved the expected technical effect: the magnetic positioning coating fixture suitable for hemispherical parts provided by the utility model is easy to operate; positioning is performed by the first micro-magnet and the second micro-magnet between the coating ring and the coating limit cover, thereby replacing the coating ring fixed by the traditional retaining edge, on the one hand, avoiding the rigid fitting between the outer edge of the hemispherical part and the traditional retaining edge, protecting the surface of the hemispherical part, and preventing the surface finish of the hemispherical part from being damaged due to rigid force clamping; on the other hand, it also reduces the contact-type cracking between the hemispherical part and the coating ring baffle caused by thermal expansion and contraction of the hemispherical part; when using the coating fixture, the hemispherical part is placed in the coating ring, and then the coating limit cover is placed on the coating ring, and the coating limit cover is automatically sucked into position by the magnetic force of the micro-magnet, so that the coating limit cover is The semi-embedded cover is on the coating ring, so that a tight positioning cavity for the hemispherical parts is formed between the coating ring and the coating limit cover, ensuring that the hemispherical parts are stably fixed in the coating fixture, making the positioning of the hemispherical parts reliable and stable. At the same time, the coating fixture is fixed in the coating machine through the first card slot, ensuring that the coating fixture will not shift in the coating machine, so that the hemispherical parts will not be biased during coating, and the coating pass rate of the hemispherical parts is also guaranteed, thereby improving the working efficiency of the coating process; an inward convex edge is provided at the bottom end of the coating ring, and the convex edge can fit closely with the outer contour of the hemispherical parts, avoiding the hard clamping of the hemispherical parts in the coating fixture, improving the stability of the hemispherical parts in the coating fixture, and avoiding the hemispherical parts from falling off the coating fixture during the coating process. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the structure of the magnetic positioning coating fixture suitable for hemispherical parts of the utility model, and this figure is also used as the abstract figure.

[0011] Figure 2 It is a partial enlarged structural schematic diagram of AA in the magnetic positioning coating fixture suitable for hemispherical parts of the utility model.

[0012] Figure 3 It is a structural schematic diagram of the coating limit cover in the utility model. DETAILED DESCRIPTION

[0013] The utility model needs to be further limited as follows.

[0014] The first micro magnet 3 and the second micro magnet 4 are attracted to each other by magnetic force, and the second clamping groove 6 is semi-embeddedly inserted into the coating ring 1 , so that the coating ring limiting cover 5 and the coating ring 1 are tightly connected.

[0015] The convex edge 8 is closely fitted to the outer contour of the hemispherical part 7 .

Claims

1. A magnetic positioning coating fixture suitable for hemispherical parts, characterized in that: It comprises a micro magnet, a coating ring (1) and a coating ring limiting cover (5); The micro-magnet comprises a first micro-magnet (3) and a second micro-magnet (4); A first micro magnet (3) is provided on the upper surface of the coated ring (1); an inward convex edge (8) is provided at the bottom end of the coated ring (1); and a first clamping groove (2) is provided at the lower right side of the coated ring (1); A coating ring limiting cover (5) is provided above the coating ring (1); a second clamping groove (6) is provided on the coating ring limiting cover (5); the second clamping groove (6) matches the coating ring (1) and is movably covered above the coating ring (1) in a semi-embedded manner; a second micro magnet (4) is provided in the second clamping groove (6) and is opposite to the first micro magnet (3) and attracts each other.

2. The magnetic positioning coating fixture for hemispherical parts according to claim 1 is characterized in that: The first micro-magnet (3) and the second micro-magnet (4) are attracted to each other by magnetic force, and the second clamping groove (6) is semi-embeddedly inserted into the coating ring (1), so that the coating ring limiting cover (5) and the coating ring (1) are tightly connected.

3. The magnetic positioning coating fixture for hemispherical parts according to claim 1 or 2, characterized in that: The convex edge (8) is closely fitted to the outer contour of the hemispherical part (7).

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