JPH0543448B2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field) The present invention involves inserting a dummy shaft coaxially into a workpiece, and creating a space between the inner surface of the workpiece and the outer surface of the dummy shaft.
This relates to a method of inserting a needle into a needle.

(Prior art) Conventionally, as shown in Fig. 1, a cylindrical workpiece 2 is set on a chuck 1 by handling, a dummy shaft 3 is set in the center of the workpiece 2 by handling, and the chuck 1 is inserted with a needle. Move and stop at the position, insert the needle, then make the lower surfaces of the dummy shaft 3 and the workpiece 2 flush, and in that state, remove the workpiece 2 from the chuck 1 and place it on the base, and slide it to the next process. Therefore, all processes require a high-precision handling mechanism that performs lateral movement, vertical movement, and centering to fit the workpiece into the chuck, which has the disadvantage that the entire device is complex, large, and expensive. Ta.

(Purpose) The present invention eliminates the chuck, allows the workpiece to be easily transported by simply sliding the table in the horizontal direction without vertical movement, and allows centering to be performed from above only at the needle insertion position. The purpose is to simplify the work, make the entire device compact, and provide it at low cost.

(Example) Next, the method of the present invention will be explained with reference to the attached FIGS. 2 to 4.

As shown in FIG. 2, a cylindrical workpiece 12 fitted in a holder 11 is sequentially conveyed to a predetermined position on a base 10, and a cylindrical dummy shaft 13 is dropped into the workpiece 12 from above. Next, the holder 11 of the work 12 containing the dummy shaft 13 is moved laterally to stop the work 12 at the needle insertion position on the base 10 as shown in FIG.

At this time, the workpiece 12 and the positioning rod 14 are coaxial. Next, the positioning rod 14 is lowered until it comes into contact with the upper part of the dummy shaft 13, and the conical part 14a formed at the tip of the positioning rod 14 is aligned with the upper part of the inner hole 13a of the dummy shaft 13 and inserted. So, dummy shaft 1
3 laterally so that it is concentric with the positioning rod 14, and aligns the outer surface of the dummy shaft 13 with the workpiece 12.
The distance between the inner surfaces is kept constant, and the needle 16 is inserted into the inner surface 15 by a known method during this time.

(Effects) According to the present invention, a dummy shaft which is cylindrical and whose outer and inner surfaces have the same axis is inserted from above into a cylindrical workpiece placed at a predetermined position on a base, and then the dummy shaft is inserted into the dummy shaft. The workpiece slides on the base and stops at the position coaxial with the positioning rod,
A positioning rod disposed coaxially above the workpiece is lowered until it contacts the upper part of the inner hole of the dummy shaft, and the right circular cone formed at the tip of the positioning rod is aligned with the upper part of the inner hole of the dummy shaft. After inserting the dummy shaft, keep the positioning rod and workpiece coaxial, move the dummy shaft laterally so that it is coaxial with the positioning rod, maintain a constant distance between the outer surface of the dummy shaft and the inner surface of the workpiece, and insert the needle between the two. Since it is designed to be inserted, there is no need for a chuck, and since the workpiece can be transported by sliding on the base, workability is good, and the entire device is compact and can be manufactured at low cost.

[Brief explanation of the drawing]

Figure 1 is a front cross-sectional view when the workpiece and dummy shaft are set in the chuck in the conventional method;
Figures to Figures 4 sequentially show the method of the present invention. Figure 2 is a front cross-sectional view when the dummy shaft is inserted into the workpiece on the base, and Figure 3 is a cross-sectional view of the workpiece shown in Figure 2 and the dummy shaft inserted with a needle. FIG. 4 is a front sectional view when the needle is held coaxially in position with a positioning rod, and FIG. 4 is a front sectional view when the needle is inserted between the workpiece and the dummy shaft in FIG. 3. 10...Base, 11...Holder, 12...Cylindrical workpiece, 13...Cylindrical dummy shaft, 13
a... Inner hole of dummy shaft, 14... Positioning rod,
14a... Conical part at the tip of the positioning rod, 15... Between,
16...Needle.

Claims (1)

[Claims] 1. A dummy shaft which is cylindrical and whose outer and inner surfaces have the same axis is inserted from above into a cylindrical workpiece placed at a predetermined position on the base, and then the workpiece containing the dummy shaft is slid on the base. The positioning rod, which is disposed coaxially above the workpiece, is lowered until it abuts against the upper part of the inner hole of the dummy shaft, and the right circular cone formed at the tip of the positioning rod is inserted into the dummy shaft. Insert the dummy shaft into the upper part of the shaft inner hole while aligning the center, and while keeping the positioning rod and workpiece coaxial, move the dummy shaft laterally so that it is coaxial with the positioning rod, and move the dummy shaft between the outer surface of the dummy shaft and the inner surface of the workpiece. A method of inserting a needle into a workpiece having a dummy shaft in which the needle is inserted between a constant value and a constant value.