Profile Grinding
Optical profile grinder, also known as PG (Profile Grinder), is a high-precision machining process.Optical profile grinding machines can grind holes with high precision hole spacing and various profile shapes.
Optical profile grinding is suitable for forming grinding of high-hardness materials, such as workpieces made of tungsten steel(alloy) or cemented carbide and occasionally processing some high-speed steel workpieces. Also can processing workpieces such as knife edges and punches for connector dies, terminals, precision half-stroke punches, lower die inserts and stripper inserts, etc.
1. In terms of processing accuracy, PG processing can reach 1um;
2. In terms of precision control of the R angle, it can also reach 0.001mm;
3. The surface roughness can reach Ra0.01μm. The surface of product processed with PG looks like a mirror.
4. Products processed by PG have high durability and long life.
The optical profile grinder is a machine tool with excellent performance for grinding curved surfaces, and it plays a very important role in mold processing.
(1) Operating principle of Profile Ginding
The optical projection magnification system is used to enlarge the image of the workpiece on the screen. And compare the enlarged workpiece image with the drawing clamped on the screen, the operator grind away the part that crosses the graph line until the contours of the workpiece are all coincident.
(2) The working process of the optical profile grinder.
Before grinding, according to the dimensions and precision of the workpiece to be ground, the magnification of 20 and 50 times is used to describe the film on the drawing. When grinding, install the magnified picture on the light screen, and use the optical projection magnification system of the grinder to image the shadows of the processed parts and the grinding wheel on the light screen. Then operate the grinding head to move longitudinally and laterally, so that the cutting edge of the grinding wheel is ground along the shape of the workpiece until the contour of the workpiece image coincides with the line of the enlarged image, and the grinding process is completed. When performing profile grinding on an optical curve grinder, due to the limitation of the size of the light screen, generally only workpieces of 20MM*25MM can be ground. When the size of the workpiece exceeds this limit, segmental grinding should be used, so the enlarged picture should be in accordance with a certain The reference line is drawn in sections, and the reference line is connected to each other during profile grinding.
(3) Precautions when grinding
1. When installing the workpiece, it is necessary to make the processed part protrude from the edge of the worktable, and firstly adjust it to the focal plane of the objective lens.
2. Before starting the machine, draw an enlarged image according to the selected division plane and projection magnification
