One, the polishing of stainless steel plate
1. Stainless steel plate (steel mill finished plate)
The polishing of stainless steel plate, there are a variety of ways to polish with abrasive grit, abrasive belts, and yarn ribbed abrasive materials. According to different uses, different or combination of polishing methods can be selected.
(1) After polishing and finishing the cold rolled stainless steel plain plate with abrasive material with a grain size of 100~120 as specified in GB2477, the stainless steel surface is a semi-polished surface. The surface roughness Ra value is 0.4~1.5μm. it is suitable for building materials, kitchen utensils, and for occasions requiring further finishing after manufacturing.
(2) GB2477 with a grain size of 150 ~ 180 grit sand belt on cold rolled stainless steel plate polishing finishing, stainless steel surface is a brighter surface fine polished surface, surface roughness Ra value of 0.2 ~ 1.5 μm. Widely used in restaurants, kitchen equipment, medical equipment, containers in front of the front, and is suitable for the edge of the building track surface and the curtain wall of the building decoration. This fine polished surface is not easy to leave fingerprints on it and is also suitable for making stainless steel doors. This surface has a mirror-like reflection effect and has special properties to reflect various light sources. Due to the use of abrasive belt polishing, regardless of the shape of the light source, the reflection is bright and straight. This bright straight line is always perpendicular to the polishing direction, regardless of the position of the stainless steel plate and the angle of incidence. Depending on the direction in which the plate is installed, it may appear as a horizontal bright line or a vertical bright line on the building. If the bright line is horizontal, it means that the polishing pattern on the surface of the steel plate is vertical. With this type of use, the surface of the steel plate is less likely to accumulate dust and is easier to rinse, which is very important for the maintenance of high-rise buildings.
(3) The surface obtained by polishing and finishing the cold rolled stainless steel vein plate with the abrasive belt with a grain size of 240 as specified in GB2477 is equivalent to the surface of 240 of the Japanese standard. Applicable to kitchen utensils.
(4) GB2477 with the grain size of W63 abrasive material on the 150 ~ 180 sand belt polished cold rolled stainless steel plate and then polished finishing, stainless steel surface has a good metallic luster, soft surface, reflective weak and does not reflect the image, is very suitable for the production of building curtain walls and building edge decoration, also widely used as kitchen utensils.
(5) GB2477 with the grain size of W50 number of abrasive materials for polishing stainless steel plate, with a high degree of reflectivity quasi-mirror surface. Equivalent to the U.S. standard with 600 rotary polishing wheel for fine polishing of the resulting surface. Mainly used on buildings and decorative items.
Many stainless steel plate sellers, in order to reduce costs and better serve customers, purchase their own stainless steel plate polishing equipment. Some sellers buy tons of stainless steel plate from stainless steel plate manufacturers, after the use of yarn on the equipment, the use of abrasive materials on the stainless steel plate for floating dry grinding or / and wet grinding and polishing, due to the operator does not understand the abrasive abrasive, often do not achieve the desired effect of polishing.
2. Stainless steel small flat plate
The decomposition of stainless steel finished plate, will get many different specifications of the size of the small stainless steel plate. These small stainless steel plates are the most heavily used stainless steel workpieces in production. As each manufacturer or polishing "workshop" situation is different, they will use different methods to polish.
(1) "Cloth wheel sticky sand" polishing
"Cloth wheel sticky sand" polishing is the use of cloth wheel bonded abrasive material polishing. In the past it was the most common method of polishing stainless steel. In the motor-driven single-head or double-head polishing machine (sander evolution over) of the rotating cloth wheel coated with polishing paste, the operator holding the stainless steel workpiece for polishing. Labor intensity, poor working environment, workshop workers are highly polluted, often need to wear a mask to operate.
Stainless steel polishing is mainly used chromium oxide and binder made of hard and sharp, strong removal ability of green wax. Green wax is a kind of polishing wax. Polishing wax (paste) for the solid form of polishing materials, mainly by the abrasive, organic paste and additives, of which the type of abrasive, crystal type, particle size, as well as the type of organic paste, ratio, etc. are important factors affecting the quality of polishing.
(2) sandpaper polishing
Place the stainless steel workpiece on a table or other platform, replace the coarse and fine sandpaper, using manpower, polishing. This polishing method is closely related to the operator's skills. Operator skill is high, will throw better. But because of the low polishing speed, to achieve the same level of surface roughness with the machine operation, is not done.
(3) Angle Grinder Polishing
The operator holds an angle grinder and installs small PVA grinding pads (angle grinding pads) of No. 120 or/and No. 220 on the angle grinder to polish the workpiece. Before polishing, it is sometimes necessary to install ordinary resin angle grinding pads for rough grinding. after polishing with PVA small grinding pads, it is sometimes re-polished with felt wheels to achieve a brighter surface.
(4) Pneumatic grinder polishing
In the production workshop pneumatic grinder installed grinding and polishing wheels, polishing area of 1 square meter or less of stainless steel plate. (Note: grinding and polishing wheel limit line speed should match the pneumatic grinder, otherwise out of safety accidents.)
(5) Grinding machine polishing
In the surface grinder, install PVA grinding wheel, select the appropriate workpiece speed, radial feed, wheel speed, polishing stainless steel workpiece work, you can get high gloss surface quality.
(6) floating grinding head polishing
In a homemade floating grinding head, homemade expensive material cloth wheel, the area of 1 square meter or so of stainless steel plate polishing. Can get a matte mirror effect.
There are some other methods, such as vibration polishing.
Two, stainless steel tube polishing
1. Stainless steel round tube
With the continuous improvement of material and cultural living standards, the society has an increasing demand for stainless steel round tube (including stainless steel composite tube), and the polishing of stainless steel tubes also puts forward higher requirements. Thus the polishing production line of stainless steel tube (stainless steel tube polishing machine) came into being. Round pipe polishing machine is mainly composed of loading device, polishing host, discharging device, by a speed motor linkage polishing machine of the three parts of the synchronous transmission of raw materials. Polishing host consists of six groups of polishing head, each group is driven by a three-phase motor.
Stainless steel round tube rough polishing, semi-finish polishing using abrasive cloth page wheel, fine polishing using PVA grinding wheel, surface roughness Ra value of up to 0.1 ~ 0.05μm .
Small diameter stainless steel round tube, there is a single grinding head polishing, equipment similar to the centerless grinder, you can use PVA grinding wheel and cloth page wheel. The grain size of the sand should be selected from 180 to fine abrasive sand.
2. Stainless steel square tube
Square tube polishing machine consists of loading device, polishing host, discharging device. The polishing host is driven by the speed control motor to realize the feeding and transmission of raw materials, and the polishing host is composed of four groups of flat throwing mechanism and four groups of side throwing mechanism.
Square tube rough casting using abrasive cloth page wheel, fine casting changed to cloth wheel coated with chrome oxide polishing paste polishing. After throwing the surface roughness Ra value up to 0.1μm.
In the polishing of stainless steel round tube and square rectangular tube, there are also small enterprises using simple stainless steel tube polishing machine (single group polishing machine). Multiple replacement of grinding wheels, multiple operations to meet the technical requirements.
Third, the polishing of shaped stainless steel
The more the per capita GDP increases, the more stainless steel is consumed per capita. Some Taiwanese bosses, it is from Japan, South Korea, Taiwan to see this trend, before coming to the mainland to invest in the stainless steel industry. And the increase in per capita GDP, personalized demand for the development of strange and varied stainless steel products are endless, a variety of shaped stainless steel products shine. Such as the stainless steel flashlight in Figure 1.
1. Stainless steel security doors
GDP per capita is very low, when families are poor, do not need security doors. Now, not only the need for security doors; and, shiny stainless steel security doors are the first choice for many families. For high-quality stainless steel security door polishing, the common use of industrial dishcloth, rarely with sanding belts. In the polishing method, more manual methods. Hand polishing efficiency is not as good as machine, but it has better flexibility. Due to the existence of many edge grooves in stainless steel doors, hand polishing has a better local polishing effect.
2. Stainless steel clasp
Because of the curved structure of the stainless steel clasp, it is difficult to use assembly line polishing. Stainless steel strap polishing, the continuation of the current use of "cloth wheel sticky sand" polishing. This may also be the lowest cost and can meet the requirements of the polishing method.
3. Stainless steel pen cap
Polishing stainless steel pen cap, Shanghai's technicians and workers, has developed a number of grinding head polishing production line. Unfortunately, when the patent, the sense of secrecy is not strong, was visited by multinational corporations copied. It is said that this multinational company, is the United States "Parker" company. Zhengzhou Textile Machinery Factory, at the beginning of the reform and opening up, in the stainless steel stamping, in front of the Japanese, also made similar mistakes.
4. Stainless steel chopper
Stainless steel chopper, there are PVA grinding wheel for polishing.
5. Stainless steel sanitary ware fittings
Currently there are four-axis stainless steel sanitary ware fittings automatic polishing machine, polishing wax, abrasive belts and other polishing stainless steel sanitary ware fittings.
6. Stainless steel tank wall
Currently there are stainless steel tank wall hanging polishing machine, by the drive shaft assembly, power mechanism, air compressor, collector ring, lifting frame, manual traction mechanism, abrasive belt grinding head, hanging mechanism, etc., the use of the drive shaft to drive the lifting frame rotating and manual traction mechanism to drive the lifting frame up and down sliding, which drives the abrasive belt grinding head to achieve the big tank wall surface polishing. Surface polishing.
7. Stainless steel drum wall
In the larger stainless steel drum wall, there are units of homemade equipment, the use of abrasive cloth page wheel polishing.
The above list of shaped stainless steel products, hanging one by a thread. In the polishing of shaped stainless steel products, the eight immortals, each showing their ability. Using a variety of machines and tools, using a variety of abrasive materials are available. Even some people use toothpaste and toothbrush to polish stainless steel shaped parts (special circumstances, not the best choice). The non-uniformity of shaped stainless steel products and workpieces has created a variety of polishing methods.
Four, the conclusion
1. According to different uses, choose the appropriate stainless steel polishing method, the appropriate grinding and polishing materials can obtain the best economic results.
2. Mechanical polishing method is currently the simplest, but also the most effective, lowest cost stainless steel polishing method.
3. PVA grinding wheels will play more of a role in stainless steel polishing.
4. Different polishing processes for stainless steel broaden the connotation of stainless steel use. Can use a polishing process, but also through the combination of several different processing methods, to produce more and more beautiful surface, thus expanding the use of stainless steel, improve people's life mood and grade.
5. At present, China is moving from a well-off society to a more affluent well-off society, the demand for stainless steel still has great potential. Therefore, the research and development of stainless steel polishing has a broad prospect, it will also further expand the scope of application of stainless steel, bring us a more beautiful environment, more comfortable heart.