That is, the grinding wheel is trimmed to the reverse side completely consistent with the surface of the workpiece, and then the workpiece is ground with this grinding wheel to obtain the required shape. There are many dressing methods for grinding wheels, mainly as follows: (1) Dressing grinding wheels with diamonds: When dressing grinding wheels with diamonds, most of them dress the geometric shape of the molding surface in sections, but some of them dress the grinding wheels into one shape. This method of dressing grinding wheel mainly depends on various grinding wheel dressing tools; To finish it. Tools for grinding wheels in production mainly include angle grinding, arc grinding, universal grinding and die grinding. Horizontal grinding wheel angle tool. Mainly used for grinding 0&; Ordm~ 90 & ampordm is between the angles of the forming grinding wheel, and then the inclined plane of the workpiece is ground with this grinding wheel. When dressing the grinding wheel, the position of the diamond tip is adjusted by calculating the pad value according to the convex and concave shape and radius of the grinding wheel. The invention can trim the contours of concave-convex arcs or arc connections with different radii. When dressing a non-circular surface, if the shape of the workpiece to be ground is complex or the outline is non-circular, the grinding wheel can be dressed with a special copying tool. Tools are special; A profiling tool for forming grinding wheels is used for trimming convex surfaces. The die tool for dressing concave forming grinding wheel is basically the same as that for convex forming grinding wheel, except that the contact point of the template is sharp. (2) Squeeze the grinding wheel with a roller.

The outline size of the extrusion roller is the same as that of the parts, and there are straight grooves and chutes with different radial distances around the wheel. The groove width is 1.5 ~ 2.5 mm, and the depth should be more than 2.5 mm above the lowest point of the molded part ... Its groove mainly plays the role of cutting edge and can accommodate the squeezed sand. The material and the center line of the extrusion wheel form10&; ordm~ 15 & amp； Ordm bevel angle: iron sheet embedded in 1 ~ 2 straight groove. After extrusion finishing, the iron sheet is also processed and formed. This iron sheet can be used to check grinding profile, forming grinding wheel or reversing roller. The diameter of the drum is generally φ 50 ~ 60 mm, and the tool for squeezing grinding wheel is mainly composed of two thimbles. The needle is driven by a motor through pulleys or gears. When the rolling theory is gradually pressed to the grinding wheel, the grinding wheel finally obtains the required shape under pressure. When using the extrusion grinding wheel tool, it is installed on the magnetic workbench of the surface grinder. During installation, the axis of the roller must be parallel to the axis of the grinding wheel when necessary. In addition, in order to dress the grinding wheel, two tools, the extrusion wheel and the diamond dressing grinding wheel, can be installed on the ordinary surface grinder at the same time. At this time, the diamond knife can be copied by template without fixture. According to the model, the grinding wheel repaired with diamond tool can grind parts. But on this device, there should be a tracker. The diamond cutter interacts with the root tracker and can be installed at the same angle at the same time. Even if the position is not easy to repair, a satisfactory profile can be obtained. In form grinding, the operator needs to convert the design size of the pattern into the process size of form grinding. The reason is that the size of process equipment parts is generally marked according to the design benchmark, and the construction benchmark selected during form grinding is often inconsistent with the design benchmark. However, due to the different processing methods of various parts, there are different requirements for the size conversion of the form grinding process.