Technical analysis of unified tool changing
Measurement error caused by different concentric rotating cutters
Influence of platform accuracy on alignment accuracy
In the process of installing the platform in the factory building, it is difficult to ensure that the platform installed in place is an ideal working plane.
In addition to the influence of the surface roughness of the platform itself, it is difficult to effectively control the measurement error of rotating workpiece on the platform within the range of 0.002mm. In addition, the cutter head cannot rotate around the same plane on the platform, and the cumulative error measured in the replacement of traditional cutter has reached 0.003mm, which will have a fatal impact on the final installation accuracy of cutter.
Image 1 （Schematic diagram of traditional cutter replacement and alignment）
In-place alignment technology
In-position tool change means that the cutter head does not need to be removed from the cutter head shaft, and the dial indicator is directly fixed on the specially designed alignment bracket. After the cutter is replaced, the cutter head is manually turned to perform the meter alignment.
As shown in Figure 2, when the cutter head rotates around the cutter axis, the motion trajectory of a certain point on the cutter is a concentric circle rotating around the same axis.
Image 2 (Schematic diagram of in-position double table alignment)
The motion state of the cutter is also the ideal state of the entire cutter head. The cutters are measured.
The alignment data of each cutter is obtained on concentric circles with the same radius of rotation.
It is easy to identify cutters with unsatisfactory manufacturing accuracy, so as to ensure the accuracy of cutter installation.
In the in-position alignment technology, the same knife is measured at the same time with two points and two meters at the head and tail of the cutting edge.
The movement state of the entire cutter on the cutter head is avoided, and the phenomenon of cutter head warping that is accidentally generated but difficult to find during cutter replacement is avoided.
Quote-[1] Xiao Lizhen, Wang Duomin. Application of in-situ alignment technology in the replacement of cutters in extrusion granulation equipment [J]. Chemical Machinery, 2009, 036(005): 480-482
