GRINDING WORK METHOD FOR NON-AXISYMMETRIC ASPHERICAL MIRROR

• Main Authors: KAWADA MASARU, MORITA SHINYA, SASAI HIROYUKI, MORIYASU KIYOSHI, OMORI HITOSHI, KIRA HIDETAKA, KADA KATSUHIKO, YAMAGATA YUTAKA
• Format: Patent
• Language: English
• Published: 11.09.2001
• Edition: 7
• Subjects: DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS; GRINDING; MACHINE TOOLS; MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; POLISHING; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL; TRANSPORTING; WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OFELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKESTHE PLACE OF A TOOL

PROBLEM TO BE SOLVED: To provide a grinding work method capable of manufacturing a non- axisymmetric aspherical mirror having high shape precision and excellent surface roughness and capable of precisely reflecting or converging light in a short period of time and with high precision. SOLUTION: An electrolytic inprocess dressing device 10 to grind and work a workpiece 1 while dressing a grinding wheel by electrolysis as well as having a disc type metal bond grinding wheel 2 having a circular arc surface 2a of a radius R on an outer edge while rotating around a shaft center Y as its center, a rotary truer 12 to true the circular arc surface 2a by rotating around an X axis orthogonal with an axis of rotation Y as its center, a shape measuring device 14 to measure a circular arc surface shape of the grinding wheel and a working surface shape of the workpiece 1 on the device and a numerical control device 16 to numerically control the grindstone in the three axial directions of X, Y, Z are furnished, and truing, grinding work and measurement on the device are repeated by moving the grindstone in the three axial directions by the numerical control device 16.