New development of surface grinder
Source of information: http://seocai.com Time: 2018/12/24 15:25:35
With the rapid development of microelectronics, optoelectronics, and laser technology, the industrial requirements for the processing of material surfaces are becoming higher and more precise. Then, only by continuously advancing on the road of research and development can we closely follow the pace of society, but what is required is that the research and development technology can play an inevitable role in it. The role of grinding in it is absolute and relative. Its technology in precision and ultra-precision machining is suitable for many materials. Moreover, it can almost reach the limit of machining accuracy in terms of machining accuracy, and is relatively simple in operation compared with other machines.
The ultra-precision grinding processing technology is based on the premise that the physical characteristics of the workpiece material are not changed, in order to obtain better surface integrity, workpiece accuracy and flatness. Grinding is usually used as the first step in polishing, in order to improve the surface accuracy of the workpiece and reduce the surface roughness to a certain extent. Polishing is to further improve the surface accuracy of the workpiece. Grinding is a process in which a grinding tool acts on the surface of a workpiece through an abrasive to perform micro-processing. The dimensional accuracy, shape and position accuracy, grinding tool life, and grinding efficiency of the surface of a grinding workpiece depend to a large extent on the grinding motion. In order to uniformly grind the surface of the workpiece, the following kinematic optimal conditions for surface grinding are summarized from the perspective of kinematics:
I. The workpiece is moving in a plane relative to the grinding tool, and it should be ensured that the points on the surface of the workpiece to be ground have the same or similar grinding trajectory relative to the grinding tool;
Second, the grinding motion is achieved by the relative movement between the workpiece and the grinding tool. The grinding motion speed at each point on the workpiece surface should be the same as possible;
3. The direction of the grinding motion should be constantly changed, and the grinding texture should be staggered and changed to facilitate the reduction of the surface roughness of the workpiece. However, it should be avoided as much as possible that the curvature of the grinding track of each point on the workpiece's surface to be polished is too large;
4. The shape accuracy of the working surface of the grinding tool or polishing disc will be reflected on the workpiece surface, so the movement trajectory of the workpiece should be distributed throughout the surface of the grinding tool and evenly distributed to facilitate uniform wear of the grinding tool;
V. The workpiece has a degree of freedom of movement in the direction of removal of the abrasive material relative to the grinding tool, which can avoid errors caused by the low precision of the grinding machine 's guidance.
The improvement of the uniformity of the grinding trajectory is beneficial to the improvement of the flatness of the workpiece, but the uniform grinding trajectory is not enough to ensure the uniform removal of the material on the processed surface of the workpiece because the points on the same trajectory may have different abrasive particles. In combination with the existing surface grinders , according to the optimal kinematic conditions of the grinding, a new type of planetary wheel constant rate reversing surface grinder was creatively developed. Through a large number of grinding experiments using a grinder, a grinding scheme with high grinding efficiency and good surface quality was explored, and a good grinding effect was obtained.