JPS606312A - Insertion of needle into workpiece having dummy shaft - Google Patents

Abstract

PURPOSE:To improve the workability for a workpiece by coaxially inserting a dummy shaft into the workpiece and inserting a needle into the slit between the inner surface of the workpiece and the outer surface of the dummy shaft. CONSTITUTION:A cylindrical workpiece 12 having a cylindrical dummy shaft 13 inserted beforehand is loaded at a prescribed position on a base 10. A positioning rod 14 coaxial with the workpiece 12 is lowered, and the lower edge conical part 14a is fitted onto the top part of a hole in the shaft 13, and the shaft 13 and the workpiece 12 are held coaxially. In this state, a needle 16 is inserted into a slit 15 by a well-known method. Therefore, the necessity of a chuck is obviated, and the workpiece can be transported through sliding on the base 10, and the workability can be improved.

Description

[Detailed description of the invention] (Technical field) The present invention coaxially inserts a dummy shaft 4 into a workpiece,
This invention relates to a method of inserting a needle into a gap between the inner surface of a workpiece and the outer surface of a dummy shaft.

(Prior art) Conventionally, as shown in Fig. 1, a cylindrical workpiece 2 is mounted on a chuck 1.
Set the dummy shaft 8 on the middle upper part of the workpiece 2 by handling, move and stop the chuck 1 to the needle insertion position, insert the needle, and then insert the dummy shaft 3 and the lower surface of the workpiece 2. In that state, workpiece 2 was removed from chuck 1, placed on the base, and then slid to the next process, so all processes involved lateral movement and vertical movement of the workpiece to fit it into the chuck. This method also requires a high-precision handling mechanism for centering, which has the disadvantage that the entire device is complicated, large, and expensive.

(Purpose) The present invention eliminates the chuck, allows the workpiece to be easily transported by simply sliding the table horizontally without moving it up and down, 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 a low cost.

(Example) Next, the method of the present invention will be explained with reference to the attached FIGS. 2 to 4. Holder 11 is placed in a predetermined position on base 10 as shown in Figure 2.
The cylindrical workpieces 12 fitted with the cylindrical work pieces 12 are sequentially conveyed, and a cylindrical dummy shirt 18 is dropped into the workpieces 12 from above. Next, the holder 11 of the work 12 containing the dummy shaft 18 is moved laterally, and the work 12 is stopped at the needle insertion position on the base IO as shown in FIG. At this time, the workpiece 12 and the positioning rod 14 are coaxial. Next, the positioning rod 14 is lowered, and the conical end portion 14α is fitted into the upper part of the inner hole 18α of the dummy shaft 13, thereby holding the dummy shaft 1B in a position concentric with the workpiece 1z. At this time, the inner surface of the workpiece 12 and the outer surface of the dummy shaft 13 are spaced apart from each other at a constant distance, and the needle 16 is inserted into this gap 15 by a known method.

According to the present invention, a cylindrical workpiece into which a cylindrical dummy shaft has been inserted is placed on a predetermined position on a base, and a positioning rod coaxial with the workpiece is lowered from above to fit the lower conical part into the upper part of the inner hole of the dummy shaft. The dummy shaft is held coaxially with the workpiece, and the needle is inserted in this state, so no chuck is required, and the workpiece can be conveyed by sliding on the base, improving work efficiency and ensuring that the entire device is compact and can be manufactured at low cost.

[Brief explanation of the drawing]

, Figure 41 is a front cross-sectional view when a workpiece and a dummy shaft are set on the chuck in the conventional method, and Figures 2 to 4 sequentially show the method of the present invention. Figure 3 is a front cross-sectional view when the dummy shaft is inserted, Figure 3 is a front cross-sectional view when the workpiece in Figure 2 and the dummy shaft are held coaxially with a positioning rod at the needle insertion position, Figure 4 is the workpiece in Figure 3. It is a front sectional view when a needle is inserted into the gap between the dummy shaft and the dummy shaft. lO...base, ll...holder, 12...cylindrical workpiece, 13...cylindrical dummy shaft, 1
8a... Inner hole of dummy shaft, 14... Positioning rod, ■4α... Conical part at the tip of the positioning rod, 15...
Gap, 16...needle. Patent applicant Koyo Automatic Machine Co., Ltd. Figure 1 Figure 2 3 Figure 3 Figure 4

Claims (1)

[Claims] A cylindrical dummy shaft 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 and stopped at the needle insertion position. A dummy is made by lowering the positioning rod arranged above the same axis and fitting the conical part at the tip into the upper part of the inner hole of the dummy shaft to maintain a constant gap between the outer surface of the dummy shaft and the inner surface of the workpiece, and inserting a needle into the gap. A method for inserting a needle into a workpiece that has a shaft.