JPS6141707B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a jig for simultaneously processing a large number of glass rods, flat plates, etc., and an object of the present invention is to provide a jig capable of grinding, polishing, etc. with high productivity and high precision. It is also an object of the present invention to provide a jig for simultaneous machining of multiple pieces of this type, which facilitates the attachment of workpiece materials and has good workability. Conventionally, there was a device of this type shown in Figure 1 (Journal of Scientific Instruments, Journal of Scientific Instruments).
Instruments, Volume 43, P669-670, September issue 1966
Year). In the figure, 1 is a piston, 2 is a pressure regulator, 3 is a sleeve, and 4 is a holder that supports and accommodates the piston 1 and sleeve 3. 5 is a leg attached to the holder 4. An angle adjustment screw 6 is positioned in relation to the spring 7. 8
is a thermoplastic adhesive (hereinafter referred to as adhesive),
Reference numeral 9 represents a workpiece material (hereinafter referred to as rod) fixed by the adhesive 8, and 10 represents a container for storing the adhesive 8. Reference numeral 11 denotes a mounting board consisting of two upper and lower plates for adjusting the angle by cooperating the angle adjustment screw 6 and the spring 7. The above conventional device (hereinafter referred to as jig) is a rod 9
When attaching the rod 9 to the device, first attach the rod 9 to the container 10 using the adhesive 8 and fix it with adhesive, then attach the container 10 with the rod 9 attached to the attachment board 11.
Attach to. Thereafter, the inclination of the mounting plate 11 is corrected by the three angle adjustment screws 6 and the three springs 7. Also, the load can be applied from 0 to 1500g. To explain the case where the above-mentioned jig is set in a commonly used small-sized polishing machine and the rod 9 is polished, the above-mentioned jig is attached to an arm that can reciprocate on the polishing surface plate of the above-mentioned polishing machine. Grinding is performed on a smooth metal surface plate embedded with diamond abrasive grains, and then polished while being constantly supplied with an appropriate amount of abrasive using a pitch surface plate. After polishing one side, the rod 9 is removed from the container 10, and the second side is bonded again using the above procedure. After bonding, observe using an autocollimator in the usual manner, and grind and polish while adjusting the jig so that both sides are parallel. Since the conventional jig is constructed as described above, it is necessary to replace the rod 9 after completing one-sided machining, and since the rod 9 is only fixed in one part,
It is difficult to obtain the same results for parallelism and flatness during attachment to the jig and after removal. Furthermore, since it can only process one piece at a time, it has disadvantages such as low productivity and high costs. The jig for simultaneous machining of multiple pieces of this invention was created in order to eliminate the above-mentioned drawbacks of the conventional method.
The purpose is to provide a jig that can grind and polish a large number of rods at the same time with high precision.A rod insertion hole is formed around the block with an adjustment hole in the center, and the periphery of the rod insertion hole is It is characterized in that dummy glass is attached to both sides of the block so as to surround it, and the rod is inserted and fixed into the rod insertion hole. The block used in the present invention is preferably an aluminum base having dimensions of approximately 120 mm in diameter and approximately 20 mm in thickness, and having a thickness and profile that allows it to be accommodated in a carrier rotating on a surface plate. Rod insertion holes are drilled at equal intervals on the same circumference with a radius of about 45 mm from the center of the block with the above dimensions, and a ring-shaped dummy glass with a diameter of about 15 mm and a thickness of about 2 mm is placed around the insertion holes. is attached. The rod inserted into the rod insertion hole through the dummy glass has a diameter of about 6 mm and a length of 24 mm. The shapes and dimensions of the blocks, rods, and dummy glasses can be changed as necessary, and the arrangement of the rod insertion holes formed in the blocks can also be determined as appropriate. As long as the abrasion degree of the dummy glass is the same as or lower than that of the rod, it is fine.For example, if the rod has a Knoop hardness of 745, the dummy glass has a Knoop hardness of 745.
I had no problems using the 657. This dummy glass increases the stability of the block and prevents its edges from sagging, and also protects the edges of the rod from scratches caused by foreign objects that enter during processing and from overload when polishing at an angle. fulfill one's role. An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 2 to 4, 12 is a ring-shaped block made of aluminum. Dummy glass 13 is pasted on both sides of this block 12, and an insertion hole 14 for a glass rod is bored through the center of the block 12. A large number of rod insertion holes 14 are formed at equal intervals on the same circumference from the center of the block 12. A dummy glass 13 is bonded to the block so as to surround this rod insertion hole 14. Reference numeral 15 is an adjustment hole for preventing the block 12 from affecting the cylindricity and straightness of the rod insertion hole 14 due to thermal expansion and contraction. A glass rod 9 is inserted into the rod insertion hole 14, and dummy glasses 13 and 13' are bonded and fixed onto the block 12 so as to surround the glass rod 9 using thermoplastic adhesives having different softening points. As the thermoplastic adhesive, for example, paraffin waxes such as Plu-Fux (softening point 110°C) and Skywax (softening point 76°C) manufactured by Nikka Seiko Co., Ltd. are preferably used. Of course, other adhesives may be used. The method of bonding the rod 9 and the dummy glass 13 will be described in detail. A predetermined number of single-sided dummy glasses 13 are pasted around the rod insertion hole 14. At this time, the block 12 is heated to about 120°C, bonded together uniformly with adhesive 17 having a high softening point, and the temperature of the block 12 is lowered to about 80°C. Place this on blue plate glass 18 that has been heated to about 80°C with dummy glass 13 facing down. Approximately 80℃ on the other side
The rod 9 and the dummy glass 13' on the other side, which have been heated respectively, are pasted and inserted into the block 12 using an adhesive 16 with a low softening point, and then cooled slowly to room temperature to remove the excess. Remove the adhesive. In this way, the dummy glass 13,
By gluing 13' using two types of thermoplastic adhesives 16 and 17, the dummy glass 1
3 and 13' can be pasted on both sides in accurate positions. Next, the grinding and polishing of the rod 9 using the above jig will be explained. Grinding by sanding is divided into two steps.The first step uses a sanding machine, which is a commonly used cast iron surface plate, and silicon carbide abrasive grains with a grain size of 40μ, which are rotated on the surface plate. The above-mentioned jig is installed in the carrier so that it rotates, and rotary grinding is performed. Rod 9
To correct the parallelism, use the adjustment hole 15 of the block 12 and move the measuring weight down to the dummy glass 13 in the required direction to adjust the sanding allowance to the determined dimension by equal amount on both end faces. After finishing one side, turn it over and sand the other side, and correct the parallelism within the sanding allowance. In the second step, grinding is carried out in exactly the same manner as in the first step, except that silicon carbide abrasive grains with a grain size of about 10 μm are used. The time required for the above-described sanding method was about 5 hours, and the variation in length of each rod could be kept within 1 μm. In the polishing process, a commonly used small polishing machine was used, and a combination of pitch plate and cerium oxide was applied. The jig of the present invention that has undergone the grinding process and the pitch plate accuracy correction ring are placed on the pitch plate, and the precision of the polished surface is adjusted by moving the correction ring to the inside or outside of the pitch plate. Naturally, by using dummy glass, the jig is stable and easy to process.
After polishing one side, turn the rod over while still connected to the block and polish the other side. If it was necessary to correct the parallelism, an autocollimator was used to observe the deviation in reflection from the previously finished surface, find the direction of adjustment, and carry out the same procedure as for the grinding described above.

【table】

[Table] As shown in the table above, a rod was obtained in a very good polished state, with high accuracy in both flatness and unilaterality within the block and after extraction, with no edge droop.
Furthermore, although the polishing time was longer, many pieces can be processed at the same time, so it can be said that overall productivity has improved dramatically. As described above, by using the jig for simultaneous machining of multiple pieces of the present invention, it becomes possible to simultaneously process a large number of workpiece materials such as rods, resulting in extremely high productivity. Easy to install and has good workability. In addition, the fact that the rods are held in a good condition has the advantage that highly accurate products can be obtained quickly, and there is no variation in quality among the rods.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional polishing jig, Fig. 2 is a top view showing an embodiment of the processing jig of the present invention, Fig. 3 is a front view thereof, and Fig. 4 is A of Fig. 2. -A' sectional view. 12...Block, 13...Dummy glass, 1
4... Rod insertion hole, 15... Adjustment hole, 16...
Low softening point adhesive, 17...High softening point adhesive.

Claims (1)

[Claims] 1. A rod insertion hole 14 is formed in the periphery of the block 12 which has an adjustment hole 15 in the center, and dummy glass 13 is pasted on both sides of the block 12 so as to surround the rod insertion hole 14. A jig for simultaneous machining of a large number of rods, characterized in that a rod 9 is inserted and fixed in a rod insertion hole 14. 2. Claims in which the dummy glass 13 on one side is attached and fixed using a thermoplastic adhesive with a high softening point, and the dummy glass 13' and the rod 9 on the other side are attached and fixed using a thermoplastic adhesive with a lower softening point. 1st
A jig for simultaneous machining of multiple pieces as described in section. 3. The jig for simultaneous processing of multiple pieces according to claim 2, wherein the adhesive is paraffin wax.