KR200219145Y1 - Rotary center for triple joint processing - Google Patents

Abstract

The present invention reduces the work process and prevents the durability from becoming weak while not forming a center hole in the outer ring of the triple joint, and provides a rotary center for triple joint machining that can quickly and accurately match the concentricity with a simple operation. The invention is provided with a bag 20 tapered to the rear, the front of the bag is reduced in diameter toward the front while the inclined portion 13 is formed on the inner side and the head having a cutout 14 on both sides ( 10 is integrally formed with the bag 20, four bowls 22 are fitted in front of the head 10, the middle plate 24 is fitted to the center and fixed by welding.

Description

ROTARY CENTER FOR TRIPLE JOINT PROCESSING}

The present invention relates to a rotary center of a lathe, and more particularly, to a triple joint machining center capable of easily snapping a triple joint requiring precision processing by a lathe between a headstock and a tailstock.

Typically, the triple joint is mounted on the handle shaft of the vehicle and serves to transmit the rotational force of the handle to the wheel, and three shafts are radially formed on the outer ring. At this time, to the outside of the shaft to perform a precise grinding operation to assemble the roller, such a grinding operation is performed in the lathe.

However, in the lathe work, the center and the dollies on both sides are used to snap and rotate the triple joint on the lathe. Therefore, the triple joint requires center holes on both sides, but shafts arranged in three directions of the outer ring are not easy to form the center holes.

That is, the center of the outer surface is supported by the center of the tail stock in the shaft of one side to be processed, and the intermediate point between both shafts other than the shaft is supported by the center of the main shaft as the same axis. The center hole is thus machined at the symmetric center point of each shaft along the outer ring of the triple joint.

In the conventional triple joint processing method, the center hole is provided in the outer ring of each shaft center and the symmetrical part of the shaft, and the center hole number is large, and the working process and the working time are extended. In addition, it is difficult to precisely match the concentricity, so the workability is difficult and the failure rate is high. In particular, the center hole formed in the outer ring of the triple joint makes the outer ring brittle and there is a fear of cracking and breakage.

An object of the present invention is to overcome the above-mentioned problems, and an object of the present invention is to provide a rotary center for triple joint processing that can reduce work processes and prevent durability from becoming weak while not forming a center hole in the outer ring of the triple joint. It is.

Another object of the present invention is to provide a rotary joint for triple joint machining that can be quickly and accurately concentrically simplified by simple operation.

In order to achieve the above object, the present invention is provided with a bag 20 tapered to the rear, the front of the bag is reduced in diameter toward the front while the inclined portion 13 is formed on both sides and A head 10 having an incision 14 is integrally formed with the bag 20, and four bowls 22 are fitted in front of the head 10, and then an intermediate plate 24 is inserted into the center and welded. It is characterized in that the fixed.

1 is an exploded perspective view of a rotary center for triple joint processing according to the technique of the present invention.

Figure 2 is a central cross-sectional view of the rotary center for triple joint processing according to an embodiment of the present invention.

Figure 3 is a front view of the rotary center for triple joint processing according to the present invention.

Figure 4 is a reference diagram of the triple joint is bitten on the shelf by the rotation center according to the present invention.

<Explanation of symbols for main parts of the drawings>

1: rotating center 4: dead center

10: Head 12: Frame

13: Tilt 14: Incision

20: bag 22: bowl

24: middle plate 30: triple joint

32, 32a, 32b: shaft

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in describing the present invention, if a detailed description of a related known function or configuration may obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a perspective view showing a state in which the rotary center for triple joint processing according to the present invention is separated, and FIG. 2 shows a central cross section of the rotary center for triple joint processing completed according to the present invention.

The rotary center for triple joint processing according to the present invention has a conventional bag 20 having a taper formed at the rear thereof, and a circular head 10 at the front is assembled with the bag by a single or screwing method. The head 10 is provided with a space portion 16 therein by the frame 20 is the front is open and the inclined portion 13 is formed therein while the diameter is reduced in the front and on both sides of the frame 12 There is an incision groove 14 concaved in the front.

Thereafter, four identical bowls 22 are fitted into the space portion 16 of the head 10. When the bowl 22 is fitted into the space 16, the diameter of the bowl 22 is larger than the depth of the space so that about 1/4 of the bowl 22 may protrude toward the front of the frame 12.

Subsequently, a rectangular middle plate 24 is fitted in the center of the space part 16 in a vertical direction, and the upper and lower ends contacting the frame 12 are welded to fix the intermediate plate. At this time, the intermediate plate 24 is divided into two bowls 22 on both sides of the intermediate plate 24, as shown in Figure 3 showing the front view of the present invention to partition the center of the space portion.

Then, the intermediate plate 24 is fitted to occupy the area of the space 16 and to close the inner bowl 22 to the edge. Thus, the front 22 of the frame 12 is reduced in diameter and narrowed to the inlet portion, so that the bowls 22 are not detached and their position is fixed.

On the other hand, the outer peripheral surface of the head 10 has a screw hole 18 for fitting the dolly 19.

By the configuration as described above, the rotary center for triple joint processing according to the present invention is operated as follows.

First, as shown in Figure 4 is fitted to the inside of the chuck (2) to rotate and mounted on the spindle headstock of the shelf to fix the bag 20 of the rotary joint for processing the present invention triple joint. In addition, the screw hole 18 of the rotation center 1 mounts the dolly 19 to connect with the chuck 2 so as to rotate together with the chuck 2.

Thereafter, a triple joint 30 for processing the shaft is mounted between the rotation center 1 and the dead center 4 fixed to the tail stock 3. At this time, the triple joint 30 has each shaft (32, 32a, 32b) formed in three directions in the outer ring 34, the center hole is processed in the center of the outer surface of each shaft, the center hole Dead center of the (4) is inserted and supported. On the other hand, the shafts 32a and 32b on both sides other than the shaft 32 on one side fixed to the dead center 4 are in a state where they are spread out from the front of the head 10 to both sides, and both incisions formed on the frame 12 are formed. It is sandwiched between the parts 14. In addition, the shafts 32a and 32b on both sides are in contact with the bowl and the bowl on both sides. Therefore, the shafts 32a and 32b on both sides are in rolling contact between the bowls, and when the tailstock 3 is moved forward, both shafts 32a and 32b are moved freely to find a center point by surface contact. Therefore, when the rotation center 1 is rotated, the triple joint 30 is rotated by rotating the bowl by inserting both shafts.

When the triple joint is rotated according to the rotational force of the main shaft by such mounting, the shaft 32 in contact with the dead center 4 is rotated concentrically and can be processed using various tools. When the shaft processing on one side is completed as described above, the tail stock 3 is reversed, the triple joint is dismantled, and the unprocessed shaft on the other side is inserted into the dead center to complete the processing by the operation sequence as described above.

As described above, the triple center machining rotary center according to the present invention is able to be bitten by the rotating shaft of the lathe without machining the center hole on the surface of the outer ring on the opposite side of the shaft to be machined. Generation can be prevented, thus reducing the process of machining the center hole. In addition, the concentric operation of the shaft to be processed is made simple and accurate so that the machining surface can be precise, no defective product is generated.

Claims (1)

The bag 20 is tapered in the rear is provided, the front of the bag is reduced in diameter toward the front while the inclined portion 13 is formed on the inner side and the head 10 having the incision 14 on both sides is Composed integrally with the bag 20, the front center of the head 10, four bowls 22 are fitted in the center, the middle plate 24 is inserted into the center of the rotary center for triple joint processing, characterized in that fixed by welding .