CN103100947B - Automobile lampshade mould body surfaces mirror polishing method - Google Patents

Abstract

The invention discloses a kind of automobile lampshade mould body surfaces mirror polishing method, sanding bottoming is carried out to lampshade mould body surfaces, the sand trace of each for lampshade mould main body is connect suitable, die main body surface ground and body surfaces cleaning, the progressive mode of first rough polishing fine polishing is again adopted to carry out polishing, automobile lampshade mould body surfaces minute surface is allowed to reach minute surface requirement, for the lifting of downstream lampshade quality provides solid condition.

Description

Mirror polishing method for main body surface of automobile lampshade forming mold

technical field

The invention relates to a method for mirror-polishing the surface of a main body of an automobile lampshade forming mold.

Background technique

At present, the surface of the main body of the lampshade forming mold in the market generally does not meet the mirror surface requirements, and the specific process is generally sanded by hand with sandpaper steps. In this method, the operator first chooses 180-grit sandpaper for preliminary sanding on the profile, and then selects 240-grit sandpaper for fine sanding, and then uses 360-grit, 600-mesh, and 800-grit sandpaper for sanding step by step, and finally uses 1200-grit sandpaper for finishing. . The surface polished by this method has poor flatness, and the finish still cannot meet the requirements.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method for mirror polishing the surface of the main body of the automobile lampshade forming mold to improve the surface quality of the lampshade product.

The technical solution adopted by the present invention is: a method for mirror polishing the surface of the main body of an automobile lampshade forming mold, comprising the following steps,

Step 1, check the marks left by machining on the surface of the mold body before polishing;

Step 2: use oilstone with a particle size of 400-600 to match the marks left by the polishing liquid grinding machine, throw back and forth between the polishing direction and the direction of the marks at 25°-30°, and then reverse the direction of the marks at 25°-30° Polishing to achieve cross-polishing until no traces left by machining can be seen;

Step 3, use oil stone with a particle size of 800-1000 to match the polishing liquid to polish the marks left in step 2;

Step 4: Use 600-mesh, 800-mesh, 1200-mesh sandpaper with polishing solution to sand step by step, and finally use 1500-mesh sandpaper with polishing solution to finish;

Step 5, use 100% pure cotton to absorb alcohol to scrub the surface of the mold body, check the polishing situation, if there are deep knife marks, then use 1500 mesh sandpaper and polishing liquid to polish along the straight side of the mold body;

Step 6, use a high-speed rotary polishing machine equipped with a wool ball stick to paste abrasive paste with a particle size of W3 to polish the surface of the main body of the mold;

Step 7, use the wool sheet to paste the abrasive paste with a particle size of W1 to polish the surface of the main body of the mold;

When polishing in steps 2 and 3, first polish the R angle and corner of the main surface, then polish the vertical part, and finally polish the plane; when polishing the R angle or corner, first grind the oilstone to match the shape of the R angle or corner Toss again.

Grind the oilstone to match the shape of the R angle or corner before throwing it. First, cut a section of sandpaper and paste it on the R angle or corner, then grind the oilstone against the sandpaper until the oilstone matches the shape of the R angle or corner, and then tear it off. Sandpaper, polished with oil stone.

When polishing R corners or corners in steps 4 and 5, paste sandpaper on the rubber pad and polish.

The beneficial effects of the present invention are: a method for polishing the mirror surface of the main body of the automobile lampshade forming mold according to the present invention, which adopts a progressive manner of first rough polishing and then fine polishing for polishing, so that the mirror surface of the main body of the automobile lampshade forming mold can meet the requirements of the mirror surface, improving the quality of the downstream lampshade The promotion provides solid conditions.

detailed description

The following are preferred embodiments of the present invention, but they do not limit the protection scope of the present invention.

The invention discloses a mirror polishing method for the main body surface of an automobile lampshade forming mold, comprising the following steps,

Step 1, check the marks left by machining on the surface of the mold body before polishing;

Step 2: Use oil stone with a particle size of 400-600 and polishing liquid to grind the traces left by the grinding machine. When using oil stone to polish, it needs to be polished with polishing liquid to avoid dry polishing. The main purpose is to prevent heat from the surface of the mold and prevent orange peel. produce. The polishing direction and the trace direction are thrown back and forth at 25°-30°, and then reversed and the trace direction is thrown back and forth at 25°-30° to realize cross-polishing until the traces left by machining can not be seen; here is an example to illustrate What is the cross polishing referred to in the present invention? For the first time, the polishing direction is thrown back and forth at 25°-30° with the trace direction, that is, it is thrown back and forth at 25°-30° clockwise (or counterclockwise) with the trace line , that is, throwing back and forth from the upper right and the lower left; after throwing, when throwing for the second time, throwing back and forth at 25°-30° with the direction of the trace means that it is 25°-30° counterclockwise (or clockwise) with the trace line °Throwing back and forth means upper left and lower right; the advantage of cross polishing is that it can effectively remove all the original traces without leaving new traces. At the same time, the main reason for choosing an angle of 25°-30° is that at this angle, the polisher can see the original traces smoothly, and at the same time, it is easier to throw.

Step 3, use oil stone with a particle size of 800-1000 to polish the marks left in step 2 with polishing fluid; the purpose of mixing with polishing fluid is the same as that in step 2.

Step 4: Use 600-mesh, 800-mesh, 1200-mesh sandpaper with polishing solution to sand step by step, and finally use 1500-mesh sandpaper with polishing solution to finish; with polishing solution, the purpose is the same as in step 2.

Step 5, use 100% pure cotton to absorb alcohol to scrub the surface of the mold body, check the polishing situation, if there are deep knife marks, then use 1500 mesh sandpaper and polishing liquid to polish along the straight edge of the mold body; the mold body is straight The purpose of polishing in the side direction is to make the fine lines on the surface of the mold body more consistent after polishing.

Step 6, use a high-speed rotary polishing machine equipped with a wool ball stick to paste abrasive paste with a particle size of W3 to polish the surface of the main body of the mold;

Step 7, use the wool sheet to paste the abrasive paste with a particle size of W1 to polish the surface of the main body of the mold;

When polishing in steps 2 and 3, first polish the R angle and corner of the main surface, then polish the vertical part, and finally polish the plane; when polishing the R angle or corner, first grind the oilstone to match the shape of the R angle or corner Toss again. When polishing, polish the R angle and corner parts, vertical parts and planes sequentially, such as when there is a boss. If it is not polished in this way, for example, the R angle and corners are put in the last polishing, it is easy to cause the R angle and corners to be polished, which will affect the plane or straight surface, and the plane or straight surface will have to be polished again, causing unnecessary wear and tear on the mold body. Increase polishing time.

Grind the oilstone to match the shape of the R angle or corner before throwing it. First, cut a section of sandpaper and paste it on the R angle or corner, then grind the oilstone against the sandpaper until the oilstone matches the shape of the R angle or corner, and then tear it off. Sandpaper, polished with oil stone. The shape of the whetstone matches the shape of the R angle or corner, which is more conducive to the polishing effect of the R angle or corner. If you directly use a small piece of whetstone to polish, the edge of the whetstone will cause deep marks at the R angle or corner, which is counterproductive.

When polishing the R corner or corner in step 4 and step 5, paste the sandpaper on the rubber pad and then polish. Since the sandpaper is thin, and it is necessary to polish every part of the mold body, especially the place that is not flat, with the rubber pad, sandpaper It can be more tightly attached to the main body of the mold, and the force is more uniform.

Polishing according to the above steps can make the mirror surface of the main body of the automobile lampshade molding mold meet the mirror surface requirements.

Claims (3)

1. an automobile lampshade mould body surfaces mirror polishing method, is characterized in that: comprise the steps,

Step one, first checks before polishing that die main body machining surface processes the vestige stayed;

Step 2, granularity is adopted to coordinate polishing fluid sander to process the vestige stayed at the oilstone of 400-600, polishing direction becomes 25 °-30 ° to throw back and forth with vestige direction, and then oppositely become 25 °-30 ° to throw back and forth with vestige direction, realize intersecting polishing, until can't see the vestige that machined stays;

Step 3, adopts the vestige that granularity coordinates polishing fluid polishing step 2 to stay at the oilstone of 800-1000;

Step 4, adopts 600 orders, 800 orders, 1200 order sand paper cooperation polishing fluid sandings step by step successively, finally coordinates polishing fluids to receive light with 1500 order sand paper;

Step 5, the cotton textiles flower with 100% is drawn alcohol and is cleaned die main body surface, checks polishing situation, coordinates polishing fluid along the direction polishing of die main body straight flange again as also having darker tool marks with 1500 order sand paper;

Step 6, adopt be provided with wool bat High Rotation Speed polishing machine be stained with grain size number be W3 abrasive pastes to die main body surface glazing;

Step 7, then with wool sheet be stained with grain size number be W1 abrasive pastes to die main body surface glazing;

First throw mouth R angle, body surfaces limit and corner portions when step 2 and step 3 polishing, then throw vertical part, finally throw plane; When throwing R angle or corner portions, first oilstone is worn into and throw again with R angle or corner matching form.

2. automobile lampshade mould body surfaces mirror polishing method according to claim 1, it is characterized in that: first oilstone is worn into throw again with R angle or corner matching form and refer to, first intercept one section of sand paper and be attached to R angle or corner, again oilstone is ground facing to sand paper, until after oilstone and R angle or corner matching form, to tear again sand paper, throw with oilstone.

3. automobile lampshade mould body surfaces mirror polishing method according to claim 1, is characterized in that: in step 4 and step 5 when polishing R angle or corner, sand paper is pasted onto polishing again on rubber blanket.