JPS606313A - Assembly of dummy shaft and needle into workpiece and apparatus thereof - Google Patents

Abstract

PURPOSE:To improve workability by simultaneously carrying-out positioning of a dummy shaft and needle insertion only by transporting a workpiece having the dummy shaft roughly inserted, to a prescribed position on a tact base. CONSTITUTION:A workpiece 10 having a dummy shaft 11 roughly inserted is transported on a tact base 12 by a tact hook (not shown in the figure). A centering rod 14 is lowered to hold the shaft 11 coaxially into the workpiece 10. Then, a push rod 13 is lowered and the needle 20 in an annular slit 17 is press-fitted into an annular slit 21. The assembled workpiece 10 is transported to the next process position on the tact base 12 by the tact hook.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a method and apparatus for assembling a dummy shaft and a needle into a cylindrical work such as an outer ring of a bearing or a piniono.

(Prior Art) Conventionally, as shown in Fig. 1, a workpiece 2 and a dummy shaft 8 are mounted concentrically on a chuck 1 by a handling mechanism.
Needle 4 was inserted in that state, which required a chuck, and required a high-precision handling mechanism to make complicated movements up and down and left and right, making the entire device large and expensive, and resulting in poor workability. There were drawbacks.

(Purpose) The present invention eliminates the need for a chuck and handling mechanism,
To improve work efficiency by simultaneously performing dummy shaft positioning and needle insertion by simply transporting a workpiece with a dummy shaft inserted into a rough position to a predetermined position on a tact base, and to make the entire device compact and inexpensively provided. The purpose is to

(Embodiment) FIGS. 2 and 8 show an embodiment of the apparatus of the present invention for carrying out the method of the present invention. Reference numeral 10 denotes a cylindrical workpiece into which a dummy shaft 11 is inserted roughly, and is conveyed and stopped at a predetermined position on a tact base 12 by a tact claw (not shown). The shaft 14α of the centering rod 14 is fitted into the center hole 18α of the bushing rod 18 disposed coaxially above the workpiece 10 so as to be movable up and down, and the centering rod 14 is inserted into the large diameter hole 18α' below the center hole 18α. The spring 15 is fitted between the upper end of the centering rod 14 and the large diameter hole 18α', and the centering rod 1
A conical portion 14A is formed at the tip of 4, and most of the centering rod 14 protrudes from the lower end of the bushing rod 13.

A base 16 is fixedly protruding from the outer periphery of the lower end of the bushing rod 18 to form an annular gap 17 between the inner surface of the base 16 and the outer surface of the centering rod 14.
A shutter 18 that can be accessed downward is attached. 1
Reference numeral 9 indicates needle supply chutes, and four needle supply chutes are arranged around the outer periphery of the push condo 1B, the tips of which open into the annular gap 17. A needle 20 is supplied from the needle supply chute 19 into the annular gap 17.

Next, the method of the present invention will be explained. dummy shirt) 11
The workpiece 10 that has been roughly inserted is the tact claw (not shown)
is conveyed on the tact base 12 and stopped at the position shown in Fig. AE2, and the tact claw returns to its original position. Next, as shown in FIG.
)11 by fitting it into the upper part of the inner hole 11α of the dummy shirt)11
are held concentrically within the work IO. Then shutter 1
8 opens, and at the same time, the bushing rod 13 descends to push and insert the needle zO in the annular gap 17 into the annular gap 21 between the inner surface of the workpiece IO and the outer surface of the dummy shaft 11. Next, the bushing rod 18 and the centering rod 14 both rise as shown in FIG. The assembled workpiece is transported on the tact base 12 to the next process position by the tact claw.

(Effects) According to the method and device of the present invention, there is no need for a conventional chuck and handling mechanism, and after the dummy shaft is roughly inserted into the workpiece, the dummy shaft is conveyed and stopped at a predetermined position on the tact base by the tact claw, and the center ring Lower the rod and bushing rod at the same time to position the dummy shaft,
The needle can be inserted at that position, and the workpiece can be transported on the tact base after the assembly work is completed, so workability is good, the whole can be made compact, and it can be manufactured at low cost.

[Brief explanation of the drawing]

Fig. 1 is a front sectional view of a workpiece and a dummy shaft mounted on a chuck used in the conventional method, Fig. 2 is a front sectional view of an embodiment of the device of the present invention before assembly, and Fig. 8 is the same as that of Fig. 2. FIG. 7 is a front sectional view when the centering rod is lowered to position the dummy shaft. IO...Work, 11...Dummy shaft, 11α
...Dummy shaft inner hole, 12...Tact base,
13... Bushing rod, 18α... Bushing rod center hole, 13α'... Large diameter part, ■4... Centering rod, 14a... Centering rod m,
14b... Conical part, 15... Spring, 16...
・Base, 17... Annular gap, 18... Shutter,
19... Needle supply chute, 20... Needle. Figure 1/I/2 Figure 3

Claims (1)

[Claims] ■ A cylindrical dummy shaft is roughly inserted into a cylindrical workpiece and transported to a predetermined position on a tact base by a tact claw, and a centerline blonde disposed coaxially above the workpiece. The dummy shaft is held concentrically within the workpiece by descending and fitting its lower end conical part above the inner hole of the dummy shaft, and in this state, open the shutter that supports the lower end of the needle disposed on the outer periphery of the lower part of the centerline blonde. A method of incorporating a dummy shaft and a needle into a workpiece by simultaneously pressing the needle and inserting it into an annular gap between the inner surface of the workpiece and the outer surface of the dummy shaft. ■ Fit the center ring blonde inside the bushing rod -O, fL so that it can move up and down, make the lower end of the center ring blonde a conical part, fix the base to the lower end of the bush rod, and create a gap between the inner surface of the base and the outer surface of the center ring rod. A device for assembling a dummy shaft and a needle into a workpiece, which forms an annular gap so that a needle can be inserted into the annular gap, and has a mouthpiece provided with a shutter that can be opened and closed to support the lower end of the needle.