JPS6144776Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a polishing spindle for a lens polishing machine in which a polishing jig mounting member and a spindle shaft can be separated.

Conventionally, the structure of a polishing spindle in which the polishing jig mounting member 4 and the spindle shaft 1 can be separated is as shown in FIG.
The polishing jig mounting member 4 was assembled into the connecting member 3 by screwing the polishing jig into the connecting member 3.

A polishing jig 20 is attached concentrically to the polishing jig mounting member 4, an abrasive is applied onto the polishing jig 20, and a spindle 23 is attached with an eccentric member 22.
While rotating, the lens 21 was being polished, which was being rotated by a swinging device (not shown) in the direction of the arrow.

The polishing jig 20 is made according to the curved shape of the lens, and is replaced for each lens shape.

Due to this structure, when transmitting the rotational center accuracy of the spindle shaft 1 to the polishing jig mounting member 4, there is a drawback that the rotational center precision of the polishing jig mounting member 4 is poor due to the structure in which the rotational center precision of the polishing jig mounting member 4 is transmitted through the connecting member 3. Therefore, there were many problems with the product, such as poor polishing accuracy of the lens.

The present invention has been made to eliminate such drawbacks.

An embodiment of the present invention will be explained with reference to FIG. 2. A polishing jig is provided in which a waterproof cover 6 is attached to the outer periphery of a spindle shaft 5 formed by integrating a conventional connecting member and a spindle shaft with fixing screws 25. It consists of a mounting member 7 incorporated therein.

At the connection point of the spindle shaft 5 with the polishing jig mounting member shown in FIG. should be 2μ or less in both the circumferential and axial directions. Furthermore, the mutual error between the outer circumference of the spindle shaft 5 and the runout of each part is 2μ.
Do the following. Further, the straight hole portion 12 and end surface portion 13 of the polishing jig mounting member 7 shown in FIG. 4 are also formed within the same tolerance accuracy as the spindle shaft 5.

The accuracy of the assembly of the spindle shaft 5 and the polishing jig mounting member 7 is determined by the straight hole portion 12 of the polishing jig mounting member 7, the straight shaft portion 9 of the spindle shaft 5, and the end face portion 13 of the polishing jig mounting member 7. is determined at the end face portion 10 of the spindle shaft 5. Since the threaded part is used only for fixing, the tolerance of engagement may be made larger.

The fitting dimensions of the straight hole portion 12 of the polishing jig mounting member 7 and the straight shaft portion 9 of the spindle shaft 5 are as follows.
Make it about H5h4 and H5h5.

As explained above, this invention controls the accuracy of parts by assembling a spindle shaft with a connection point with an integrated connection member and a polishing jig mounting member having a connection point that engages with this connection point. By doing so, it is possible to improve the accuracy of the rotation center of the polishing jig attachment member that engages with the spindle shaft, which has the effect of making it possible to process products with higher precision than before.

[Brief explanation of the drawing]

FIG. 1 is a structural diagram of a conventional spindle, FIG. 2 is a structural diagram of the present invention, and FIGS. 3 and 4 are detailed explanatory diagrams of connection points. 1, 5... Spindle shaft, 2, 6... Waterproof cover, 3... Connection member, 4, 7... Polishing jig mounting member, 20... Polishing jig, 21... Lens, 22...
... Eccentric member, 23 ... Spindle, 24 ... Lens support jig (lens bonded), 25 ...
Fixing screw.

Claims (1)

[Scope of utility model registration request] In a spindle of a lens polishing machine having a spindle shaft and a polishing jig attachment member screwed onto the spindle shaft, the spindle shaft has a male screw portion, a straight shaft portion, and an end surface portion formed thereon, and the male screw portion in the center portion, A polishing jig mounting member is formed with a straight shaft part, a female thread part that engages with the end face part, a straight hole part, and an end face part, and a waterproof cover is attached to the outer periphery with a fixing screw, and A polishing spindle for a lens polishing machine, characterized in that it is screwed together with a polishing jig mounting member.