CarrProPolish

Parameters and polishing conditions can now be entered on the screen!!

The double-sided polishing and platen correction simulation program uses a double-sided polishing machine to calculate and display on the screen the amount of polishing and flatness of both sides of circular works placed symmetrically within multiple carriers sandwiched between upper and lower platens, the wear amount and flatness of the upper and lower platens (tools and pads), and the changes in wear and flatness of the carriers and upper and lower platens when the shape of the upper and lower platens is corrected using petal carriers, eccentric carriers, etc.

The structure of a double-sided polishing machine is complex. The rotation of the upper and lower platens, the rotation and revolution of the carriers, work rotation within the carrier, and the polishing pressure can all be freely changed. The process of the work being polished and the upper and lower platens wearing down is calculated at each coordinate point according to Preston's fundamental theoretical formula, based on the assumption that it is proportional to the product of the relative velocity between the work and the upper and lower platens, pressure, and polishing time. The relative velocity along the trajectory traced by each point of the work, and the pressure calculated based on the gap theory from the shape of the work surface and the upper and lower platen surfaces are integrated and averaged for each work and platen radius to calculate the shape. 

　(1) The work is a thin plate that can be freely deformed by pressure from the upper and lower platens.

　(2) The carrier can be freely specified as petal-shaped, annular, disc-shaped, eccentric circle, etc.

　(3) The work is circular, the upper and lower mounting platens are annular, the carrier is placed on the mounting platens, and multiple works are evenly and symmetrically arranged within the carrier.

　(4) The lower platen is annular in shape, and the carriers are evenly distributed on the platen.

　(5) Pressure and the deformation of the polishing pad are proportional.

　(6) If all work thicknesses and carrier thicknesses are equal, the upper platen will not tilt. On the other hand, if the thickness has a distribution in a certain direction, the platen will tilt in that direction, and an eccentric load will occur. This tilt can also be taken into account in the calculation.

　(7) The rotation speed of the work is constant.

　(8) The calculation of travel distance, removal amount, and wear amount is performed by integrating and averaging in the angular direction, and then displayed as a function of radius.

　Its features are described below.

　(1) The inner and outer radii of the platen, the work radius, the inner and outer radii of the carrier, the revolution radius of the carrier, the center distance between carrier and work, and the eccentricity of the carrier's inner diameter are arbitrary.

　(2) The number of carriers placed on the platen and the number of works placed in the carrier is arbitrary.

　(3) The rotation speeds of the inner and outer rings that rotate the work and carrier, the upper and lower platens, and the pressures on the work and carrier are all arbitrary.

　(4) It is possible to process calculations with different input polishing conditions all at once.

　(5) Instantly displays the carrier arrangement and gear shape within the surface plate.

　(6) The relative velocity distribution, pressure distribution, and gear rotation direction during polishing are displayed on the screen, and these can also be made by hardcopy, allowing you to see how the work and the upper and lower platens wear down.

　(7) Since the upper and lower surface shapes of works, the upper, lower shapes of the carrier and the shapes of the upper and lower platens can be input as a function of radius, it is possible to simulate the polishing process, including how the uneven shapes of the upper and lower surface shapes of works, the lower and upper shapes of the carrier and the upper and lower platens created during pre-polishing affect the upper and lower surface shapes of works and the upper and lower shapes of carrier.

　(8) The work and carrier and platen shapes can be plotted using grid lines in a 3D model.

　(9) You can choose to input either the rotation speed of the inner and outer rings, or the rotation speed of the carrier's rotation and revolution.

　(10) The work and carrier extend beyond the inner and outer edges of the platen, and the amount of overhang can be freely adjusted.

　(11) It is possible to process travel distance and shape calculations in a single operation.