It is not difficult to process steps with a surface grinder. It should be noted that steps can be ground from two directions, and the basis for choosing which surface to cut steps from is efficiency. As shown in the figure below, if the same part is changed in one direction, the grinding efficiency will be different. Which direction would you choose to start from if you are smart?
01
Extra long workpiece grinding steps
When the grinding area of the workpiece is relatively large, the heat generated during processing is large, and it is easy to deform. Therefore, it is necessary to pay attention to the rough cutting and the direction of cutting steps. Grind one side, then stand up to grind the other side, try to avoid grinding with the side of the grinding wheel, and finally change to a finer grinding wheel to clear the corners.
02
Grinding steps for small workpieces
Small workpieces often encounter a step of only 0.1mm or even 0.05mm. Grinding this kind of step can be processed arbitrarily for non-precision processing. For precision parts, it must be cleared. Generally, it will be indicated in the design that it needs to be cleared. Angle so that R is less than 0.03mm, no matter how small the step is, it must come out straight, even if there are only a few wires, the general material can be achieved by cleaning the angle 3-5 times with 120K, and it is more troublesome for materials with particularly high hardness, such as For DC53, SKH-9 and other materials, it is necessary to use a finer grinding wheel such as 360K to clean the corners, and the number of times needs to be increased accordingly. If the R size is checked, the experienced master will do it based on feeling and experience. The time is not long Friends can use the projection to check, and you will know it in your heart after several projections.
03
steps with R
This kind of situation is also very common. It should be noted that when roughing, it is necessary to leave the position of R to open a step. When finishing, repair R and directly repair it in place, as shown in the figure below.
04
four steps
For this type of workpiece, it is necessary to pay attention to leaving a certain craft table on each surface. Some places are called standing feet. Otherwise, there will be no support points when grinding the steps and finishing, and there may be deformation. You don’t need to leave too much craft table, 0.7-2mm is enough Yes, it will not be deformed when the craft table is conveniently removed.
