Center liquid supply small grinding head polishing tool

Abstract

The invention discloses a center liquid supply small grinding head polishing tool. The polishing tool comprises a flexible polishing pad, a sponge sandwich layer, a polishing disc, a connecting rod, a hose, a flexible coupling and an electric main shaft. The polishing tool has the following effects: the peripheral liquid supply is improved to the center liquid supply; sufficient polishing liquid is supplied to the center area; the polishing liquid takes away a lot of machining heat and chips from the machining area; and the surface wear condition of the flexible polishing pad is obviously better than that of a traditional small grinding head polishing tool. The wear resistance of the flexible polishing pad can be improved; the service life of the flexible polishing pad is prolonged by more than four times; the replacement frequency of the flexible polishing pad is reduced; and the production cost is reduced. The polishing liquid is supplied from the center of a tool to the periphery; and compared with the peripheral liquid supply, the abrasive grain supply in the whole machining area is more sufficient and uniform, and the updating speed of abrasive grains is more stable, so that the wear condition of the flexible polishing pad is greatly improved. The center liquid supply small grinding head polishing tool is more stable in material removing efficiency in whole machining period, and is higher in surface shape control capacity.

Description

Technical field [0001] The invention belongs to the technical field of optical processing tools, and in particular relates to a polishing tool with a small grinding head for central liquid supply. Background technique [0002] Traditional small grinding head polishing tools mainly include soft grinding discs, solid rods, sponge interlayers and soft polishing pads; one end of the solid rod is fixed on the center of the upper end surface of the soft grinding disc, and the other end is connected to the grinder; The sponge interlayer is installed on the lower end surface of the soft small grinding disc, while the soft polishing pad is set on the outer surface of the sponge interlayer, and the outer surface of the soft polishing pad is provided with ten grooves; this kind of small grinding head polishing The tool is a contact processing method using free abrasives to polish the surface of the workpiece, that is, a small soft grinding disc is used as a polishing tool. During the proces...

AI Technical Summary

Problems solved by technology

[0003] Although the traditional small grinding head polishing tool has a long history and relatively mature development, it has been widely used in the grinding and rough polishing stages of optical processing, but its disadvantage is that the surface shape control ability is easily affected by the abrasive concentration, abrasive type, abrasive particle distribution, grinding head Influence of wear and other factors: First, the traditional small grinding head polishing tool adopts the way of supplying liquid around. Due to factors such as centrifugal force generated by tool rotation under high-speed processing conditions, the polishing liquid is not easy to enter the central area of ​​the soft polishing pad. As a result, the distribution of abrasive grains is uneven, the update speed of abrasive grains is slow, and the heat generated by processing is not easy to dissipate, which eventually leads to excessive wear of the central area of ​​the soft polishing pad, which greatly reduces the service life of the soft polishing pad; secondly, polishing The soft polishing pad needs to be replaced frequently during the process, which reduces the production efficiency and increases the production cost; finally, the uneven distribution of abrasives and the excessive wear of the soft polishing pad will also cause the instability of the removal function

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