1. Classification of high-precision diamond rollers:
(1) Sintering method: There are two types of hand-sintered sintering rollers and randomly distributed sintering rollers, which have strong durability;
(2) Electroplating method; manufacture small and complicated shape rollers with high accuracy;
(3) CVD roller: new material, good dressing effect for CBN wheel.
At present, the sintering method is mainly used in China. Compared with the electroplating method, it has a longer life and more stable performance. However, the opposite is true abroad. The electroplating method is more widely used than the sintering method. The following figure shows the manufacturing methods and characteristics of sintered diamond rollers and electroplated diamond rollers.
2.Manufacturing process of high precision diamond roller
The manufacturing process of the sintering method is as follows: a mold is processed according to the figure, and then artificial implantation is used to insert large-grain diamonds in a mold in a certain density in an orderly manner, followed by sintering in a sintering furnace using powder metallurgy technology and removing the mold. The diamond profile is used as the reference, the hole and end face are processed, and then the grinding wheel is used to trim the grinding wheel. At this time, the diamond roller is a rough part, and there is a deviation in dimensional accuracy. The deviation value must be initially measured by a testing center instrument to calculate a suitable trim. The remaining amount is finally repeated on the special dressing machine after repeated grinding and testing until it meets the requirements of the finished product drawing.
The manufacturing process of the electroplating method is: according to the technical requirements of the cross-section of the produced part, a mold is made, the artificial diamond is plated, the binder (low melting point alloy) is bonded to the steel core, and the metal cutting process (reference conversion) is used to remove the abrasive tire Body, so that the diamond is exposed uniformly, trim the grinding wheel on the grinder, duplicate a workpiece, and measure all the technical requirements of the workpiece profile at the testing center, and the finished product is qualified.
3.Summary of failure causes and treatment methods of high-precision diamond rollers during dressing
High-precision diamond rollers often have loud sounds, chatter marks, grinding burns, rough surfaces, and local protrusions during dressing. The following table describes the reasons and solutions for the above five conditions
