JPH03190660A - Holder for die top grinding - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a holder for polishing mold pieces for molding glass press lenses and plastic lenses.

[Conventional technology]

The spherical part of a mold piece for a glass mold made of a hard and brittle material such as cemented carbide or SiC ceramic is required to be formed with high eccentricity accuracy of 10" or less.

Conventionally, the spherical part of the mold piece is polished using a high-precision polishing machine, but there is a rotational deviation of about 0.1 μm on the work shaft that supports the mold piece on the polishing machine. As shown in Figure 1, even if the mold piece was attached to the holder via a needle hair ring and polished, a highly accurate spherical part with small eccentric runout could not be obtained.

[Problems to be Solved by the Invention] The present invention provides a mold piece polishing holder that allows the spherical part of the mold piece to be polished by being attached to a polishing machine to obtain high processing accuracy without eccentric runout. The purpose is to provide the following.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention provides a mold piece polishing holder with a mounting part for fixing the lower end of the mold piece and a flange-shaped part perpendicular to the mounting part. a mold piece holder member having a part;
an angle adjustment member having a flat part that supports the brim-like part of the mold piece holder member and a curved surface formed on the opposite side of the flat part; and a curved surface that fits with the curved surface of the angle adjustment member. The mounting member formed on the opposite side of the curved surface to engage with the drive shaft of the polishing machine side is composed of a mounting member having a part, and the mold piece holder member is adjusted and fixed on the flat part of the angle adjusting member. The present invention is characterized in that it has a means for adjusting and fixing the curved surface of the angle adjusting member on the curved surface of the member, and eccentric runout of the mold piece can be corrected by the means for adjusting and fixing the curved surface of the angle adjusting member. It is something.

(Function) With the configuration of the present invention, the spherical part of the mold piece supported by the polishing machine via the mold piece polishing holder of the present invention detects the state of eccentric runout by the detection member that comes into contact with the spherical part. However, by adjusting the adjustment and fixing means between the mold piece holder member and the angle adjustment member, and between the angle adjustment member and the mounting member according to this eccentric vibration, the positioning is performed without eccentric vibration. It is something that

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows a cross section of a mold piece polishing holder according to the present invention.

Reference numeral 1 denotes a mold piece made of SiC ceramics and provided with a spherical part IA to be polished, and this mold piece 1 is supported by a part 2a to which a mold piece holder member 2 is attached. In this case, the inner diameter of the mounting part 2a is made to a dimension that allows easy insertion and removal of the mold piece 1, and a plurality of tapped holes 2a are formed in the mounting part 2a at intervals of 120 degrees, and the plurality of tapped holes The mold piece 1 is fixed with screws inserted in 2a.

The mold piece holder member 2 is attached by forming a horizontal flange-shaped part 2b at the lower end of the part 2a so that the mold piece holder member 2 can be adjusted in a direction perpendicular to the rotation axis of the mold piece 1. , the horizontal brim portion 2b is a horizontal flat portion 3 of the angle adjustment member 3.
It is fixed in contact with a. This horizontal brim portion 2b is provided with a first adjusting and fixing means, which will be described later, which can adjust the eccentric runout of the spherical portion with respect to the horizontal flat portion 3a.

The angle adjustment member 3 includes the horizontal plane part 3a and a curved surface 3b on the opposite side of the plane part 3a, which allows angle adjustment. The curved surface 3b of the angle adjusting member 3 is fixed in contact with the curved surface 4a formed on the member 4 when attached to the polishing machine side. Then, the curved surface 3b of the angle adjustment member 3
When attached to the polishing machine side, a second adjustment and fixing means, which will be described later, is provided on the curved surface 4a of the member 4, which can adjust eccentric wobbling of the spherical portion.

The member 4 for attachment to the polishing machine side has the curved surface 4a, and a screw hole 4b on the opposite surface of the curved surface 4a for fixing the member 4 to the polishing machine.

First adjustment and fixing means R1 capable of adjusting eccentric vibration of the spherical part
Four tapped hole portions 5 are formed in the horizontal plane portion 3a of the angle adjustment member 3, and the flanged portion 2b of the mold piece holder member corresponding to the tap hole portions 5 is provided with the taps. By forming the opening hole 6 larger than the hole portion 5 and providing the opening hole 6 larger than the tapped hole portion 5, the mold piece holder member 2 can be displaced back and forth and left and right with respect to the angle adjustment member 3. can.

After adjusting the position of the mold piece holder member 2 with respect to the angle adjustment member 3, the bolt 7 is inserted into the washer 8. The angle adjustment member 3 is screwed into the tapped hole portion 5 through the opening hole 6.
The mold piece holder member 2 is fixed to.

Second adjusting and fixing means R2 capable of adjusting eccentric runout of the spherical part
For installation on the polishing machine side, three tap holes 9 are formed on the periphery of the curved surface 4a of the member 4, and the horizontal plane portion 3a of the angle adjustment member 3 is extended by corresponding tap holes 9. In the portion 3c, an opening hole 10 larger than the tap hole portion 9 is formed, and by providing the opening hole 10 larger than the tap hole portion 9, the attachment on the sanding machine side is at an angle with respect to the curved surface 4a of the member 4. The curved surface 3b of the adjustment member 3 can be displaced.

After adjusting the position of the angle adjustment member 3 relative to the member 4 for mounting on the sanding machine side, the bolt 1.1 is inserted into the washer 12 and the opening hole 1.
The angle adjusting member 3 is fixed to the member 4 for attachment on the sanding machine side by being screwed into the tapped hole portion 9 through the thread 0.

The above-mentioned adjustment of the first adjusting and fixing means R1 and the second adjusting and fixing means R2 is carried out by supporting the mold piece 1 on the mold piece polishing holder of the present invention, and attaching the mold piece polishing holder to the drive shaft. Installation is through screw hole 4
This is done after installing it on the polishing machine according to b. At this time, the electric micro-measuring element 13 is brought into contact with the spherical part IA of the rotating mold piece 1, the amount of displacement of the electric micro-measuring element 13 is read by the meter 14, and from this value, the spherical part IA of the mold piece 1 is IA
The first adjusting and fixing means R8 and the second adjusting and fixing means R2 are adjusted so as to eliminate the eccentric deflection of the spherical portion IA.

Then, by polishing the spherical portion IA of the mold piece 10, which rotates without eccentric vibration, using a polishing FIX machine, a mold piece having a highly accurate spherical portion IA can be obtained.

〔effect〕

With the configuration of the present invention, the eccentric runout of the spherical part of the mold piece can be brought to a state close to zero, and the glass press lens has high precision due to the highly accurate spherical part of the mold piece.

It has the effect of being able to obtain plastic lenses.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the mold piece polishing holder of the present invention, and FIG. 2 is a schematic sectional view of a conventional mold piece polishing holder. ■... Mold piece, IA... Spherical part, 2... Mold piece holder member, 3... Angle adjustment member, 4... Member for attachment on the sanding machine side, R5... First adjustment fixing means, R2...
Second adjustment fixing means, 13... electric micro-measuring element.

Claims (1)

[Claims] a mold piece holder member comprising a mounting part for fixing the lower end of the mold piece and a flange-like part perpendicular to the mounting part; a flat part for supporting the flange-like part of the mold piece holder member; an angle adjustment member having a curved surface formed on the opposite side; a curved surface that fits with the curved surface of the angle adjustment member; and a mounting portion that engages with a drive shaft on the polishing machine side formed on the opposite side of the curved surface. and a means for adjusting and fixing the mold piece holder member on the flat surface of the angle adjusting member, and a means for adjusting and fixing the curved surface of the angle adjusting member on the curved surface of the mounting member. A holder for polishing a mold piece, characterized in that the eccentric runout of the mold piece can be corrected by the adjusting and fixing means.