JPS6138860A - Machining - Google Patents

Abstract

PURPOSE:To machine plural works integrally thus to achieve high machining accuracy by fixing plural planer works in lamination through adhesive then performing machining thereafter removing the adhesive. CONSTITUTION:After holding plural lens arrays 1 throughd a holding tool 11, adhesive is injected to the contacting face of the lens array 1. Upon hardening of adhesive, conventional polishing is performed then conventional thermal treatment is performed to increase the weather-resistance of lens array 1. Here, the adhesive is removed simultaneously. Since plural works are machined integrally, the work will never flex nor the pressing force of tool will be uneven when machining resulting in high machining accuracy.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for machining multiple workpieces simultaneously.

2. Description of the Related Art When a plurality of workpieces are machined at the same time, the workpieces are usually held by a workpiece holder so that they can be easily transported and fixed to a machine tool.

For example, when polishing both end faces 2.3 of the plate-shaped gradient index lens array 1 using a polishing machine as shown in the drawing, the holder 11 shown in the drawing is used. That is, the lens array 1 is held by the holder 11 by stacking a plurality of lens arrays 1 in the holder 11 and screwing in the bolts 12.

Note that the gradient index lens array 1 has a large number of rod-shaped gradient index lenses arranged closely in parallel with each other, these lenses are sandwiched between outer plates made of glass fiber-reinforced epoxy resin, and furthermore, these lenses and The outer plates are joined and integrated with silicone resin to form a single plate.

Problems to be Solved by the Invention However, due to the structure of the holder 11, the tightening force by the port 12 is concentrated on both side ends 4° 5 of the lens array 1.
It tends to be weaker in the central part 6.

This tendency is particularly remarkable in a lens array 1 in which the distance between both side ends 4 and 5 is long, that is, in a long lens array 1.

As a result, when a grindstone (not shown) of a polishing machine is pressed against the end face 2 or 3 of the lens array, the lens array 1 is bent and the polished surface is not perpendicular to the optical axis of the lens array 1, or the end face Insufficient polishing may occur because the pressing force of the grindstone against 2 or 3 is uneven. Therefore, high machining accuracy cannot be obtained by the machining method described above.

Means for Solving the Problems The working method according to the present invention involves fixing a plurality of plate-shaped workpieces in a stacked state using an adhesive, making these fixed workpieces at the same time, and then I am trying to remove the adhesive.

Effect: In the machining method according to the present invention, a plurality of workpieces are machined as one piece.

EXAMPLE Hereinafter, an example of the present invention applied to polishing of a gradient index lens array will be described with reference to the drawings.

In this embodiment, after a plurality of lens arrays 1 are held by a holder 11 as shown in the drawings, an adhesive is injected into the contact surfaces of the lens arrays 1.

Then, after the adhesive hardens, polishing is performed in the conventional manner, and in order to increase the weather resistance of the lens array 1, heat treatment is performed in the conventional manner after polishing. This heat treatment is carried out in a hot air drying oven at approximately 200℃ (
(not shown) for about 16 hours, and the adhesive is also removed at the same time.

Therefore, the adhesive should be removed by a method that does not adversely affect the various resins mentioned above that make up the bonding agent of the lens array 1 and the outer plate, such as sublimation or decomposition by heat treatment at about 200 degrees Celsius. It is necessary that no stains remain on the exterior of the lens array 1 that would result in product defects, that the curing time is short in terms of work efficiency, and that it can penetrate into the contact surfaces between the held lens arrays 1. be.

From the above points, in this example, alpha cyanoacrylate
1. A monomer (trade name: Aron Alpha) is used as an adhesive. Since this adhesive is removed during the heat treatment to improve weather resistance as described above, there is no need to provide an extra step for removing the adhesive, and there is no particular reduction in work efficiency.

Although the above embodiments apply the present invention to polishing a gradient index lens array, it goes without saying that the present invention can also be applied to other types of work.

Effects of the Invention As described above, in the machining method according to the present invention, a plurality of workpieces are machined as one piece. Therefore, even if the holding force of the workpiece holder is not uniform, the workpiece is less likely to bend during machining or the pressing force of the tool against the workpiece becomes uneven, and high machining accuracy can be achieved.

[Brief explanation of drawings]

The drawing is a schematic perspective view showing a method of holding a workpiece by a workpiece holder. In addition, in the reference numerals used in the drawings, 1-----------1----- Gradient index lens array 11------------1 −・
The holder 12 is a bolt.

Claims (1)

[Claims] 1. A step of fixing a plurality of plate-shaped workpieces in a stacked state with an adhesive, a step of simultaneously working the plurality of workpieces fixed in a stacked state, and a step of and removing the adhesive from each of the plurality of workpieces. 2. The working method according to claim 1, wherein the workpiece is a lens array in which a large number of rod-shaped lenses are closely arranged parallel to each other and bonded together with resin. 3. The working method according to claim 2, wherein the adhesive can be sublimated or decomposed and removed by heat treatment at a temperature that does not adversely affect the resin.