JPS5935304Y2 - Collect chuck in automatic roll machine - Google Patents

Description

[Detailed description of the invention] This invention relates to a collet chuck that holds the material processed by an automatic silver-gold rolling machine from the inside.

Conventional automatic roll machines produce pressed products (hereinafter abbreviated as raw materials).

) is attached to a holder whose size is somewhat smaller than the material attached to the end of the main shaft by a pusher tip rotatably held at the tip of the pushing shaft, and during processing the bottom plate is pressed against one end surface of the holder by the pusher tip. was holding it.

However, in this holding method, there is a slight dimensional difference between the inner wall surface of the material other than the bottom plate and the outer wall surface of the holder, so there is a drawback that the material cannot be held sufficiently reliably.

The purpose of this invention is to eliminate the above-mentioned drawbacks and to provide a collet chuck for an automatic roll machine that can sufficiently securely hold the inner wall surface of the material by utilizing the pressing effect of the pusher tip on the bottom plate of the material. That is.

To explain the embodiment, reference numeral 1 denotes a main shaft having a through hole 2 in the center, and at the tip of the main shaft 1, a tapered member 3 having an inclined part 4 on the end face side away from the main shaft 1 is formed into four hexagonal parts. It is fixed with a bolt 5 with a hole.

On the end face of the tapered member 3, in addition to the four bolt mounting holes 6, there is a spring storage hole 1 into which a spring 9 for pressing the chuck holder 7 mounted on the tapered member 3 toward the run body 8 is inserted.
Four bolt mounting holes 11 are provided for fixing the 0 and 7 run bodies 8 to the tapered member 3 with hexagon socket head bolts 5'.

Reference numeral 12 denotes a groove 12 which is provided for a predetermined length parallel to the length direction of the main shaft 1 at a position dividing the crown attachment side of the chuck holder 7 into 8 equal parts. The circular hole 14 is larger in size than the width of the hole 14 to alleviate stress concentration during expansion.

A protrusion 16 for holding the material 15 in a direction perpendicular to the groove 12 is formed on the outer circumferential surface of the chuck holder 7, and a protrusion 16 is formed on the end surface of the protrusion 16 on the main shaft 1 side so as to move downward together with the header shaft 17. The first piece 18, which is a shearing blade, intersects at a certain depth to perform edge cutting of the material 15, or to cut the edge of the material 15.
is fixed and the cutting process is performed using a cutting tool attached to it.

Reference numeral 19 denotes a space formed in the chuck holder T, in which the wall thickness t at the tip of the split groove 12 is made thin to improve the holding action of the material 15 by the chuck holder 7, and also to allow the material 15 to be inserted into the spring storage hole 10. Chuck holder 7 with attached spring 9
plays a role in adjusting the suppressive effect on

At the center of the taper members 3 and 7, the main shaft 1 is located at the center of the run body 8.
Through holes 20 and 21 are provided at positions continuous with through hole 2, respectively.
A protruding rod 22 is installed through these through holes 2, 20 and 21, and the tip of the ejecting rod 22 is positioned in the recess 23 of the seven-run body 8 during edge cutting or cutting of the material 15. Attach plate 24.

Since the present invention has the above configuration, when the automatic sheet metal rolling machine is operated by the electric motor M, the materials 15 fed one by one from the material feeding device 25 to the holding part 27 of the feeding arm 26 are
In the figure, it is rotated in a direction perpendicular to the plane of the paper and fed to the front surface of the chuck holder 7.

At the same time, the pusher tip 13 is pushed toward the chuck holder 7 via a cam 29 attached to the shaft 28, a passive roller 30 that presses the cam 29, a passive arm 31, and link devices 32 to 34. The J material 15 is attached to the chuck holder 7 by the action of the shaft 35.

The bottom plate portion 36 of the material 15 is the end surface 3 of the chuck holder 7
7, the chuck holder 7 is pressed against the 7-run body 8 by the elasticity of the spring 9, and its end surface 37 protrudes outward by a distance l from the end surface 38 of the 7-run body 8, as shown by the solid line. Since the outer diameter of the protrusion 16 is small, a dimensional difference of a few thousandths is formed between the protrusion 16 and the inner wall surface of the material 15.
It is possible to easily attach 150 pieces of material.

Furthermore, when the material 15 is pressed by the pusher tip 13,
The chuck holder 7 is moved by the spring 9 until the inner wall surface of the material 15 is aligned with the end surface 38 of the seven-run body 8, as shown by the dashed line.
The taper moves toward the member 3 against the pressing force of.

Due to this movement, the inclined part 39 of the chuck holder 7 receives a force in the direction of pushing outward and expanding from the inclined part 4 of the tapered member 3, and the outer diameter of each end piece 40 divided by the groove 12 is indicated by a solid line. It expands from the position shown to the position shown by the one-dot chain line, and the inner wall surface of the material 15 is securely held by the protrusion 16.

At the same time as the chuck holder 7 holds the material 15, the header is held by a cam 41 attached to the shaft 28, a passive roller 42 that presses against the cam 41, and upper and lower arms 44 whose ends are pivoted to the tips of the driven roller 42 and the header 43, respectively. The first piece 1 attached to the ladder shaft 1T on the tip side of 43
8 is lowered to partially intersect with the side end surface of the protrusion 16 to perform edge cutting or cutting of the material 15.

When the edge cutting or cutting process by the first piece 18 is finished and the header 43 starts to be moved upward by the upper and lower arms 44, the pusher tip 13 is separated from the material 15 by the pusher shaft 35.

Therefore, the chuck holder 7 is moved to the right by the spring 9, released from the expansion action by the inclined portion 4 of the tapered member 3, and returns to its original size as shown by the solid line.

At the same time as the pusher tip 13 separates from the material 15, the protruding rod 22 mounted inside the main shaft 1 is pushed out toward the material 15, thereby removing the material 15 which has a size difference of a few thousand degrees from the outer wall surface of the chuck holder 7. can be removed from the chuck holder 7 very easily.

The pushing out operation of the protruding rod 22 is performed by rolling a cam roller 49 at the tail end of a lever 48 whose intermediate portion is pivoted 47 to a frame 46 into contact with a surface cam 45 attached to a shaft 28 by a spring 50.
By rotating the surface cam 450, the protruding rod 22 connected to the upper end of the lever 48 is reciprocated in the two directions of the through hole of the main shaft 10.

The material 15 can also be removed from the chuck holder 7 by using a puff removal device that acts on the outer circumferential surface of the material 15 at right angles to the direction of rotation, in addition to the ejecting rod 22.

The section 51 to be edged or cut by the first piece 18 is cut and removed by moving the first piece 18 upward and lowering the arm 53 to which the second piece 52 is attached by means of the upper and lower arms 54.

The above operation is performed by transmitting the movement of the passive roller 57 to the lower ends of the upper and lower arms 54 using a cam 56 attached to the shaft 55 and a passive roller 57 that presses against the cam 56.

In the above embodiment, a collet chuck consisting of a taper member, a chuck holder, and a 7-run body is applied to a material having a circular cross section. By forming it appropriately, it can also be applied to materials with non-circular cross sections.

As is clear from the above explanation, according to this invention, the material can be attached to the chuck holder.

In addition to being extremely easy to remove, the inner wall surface of the material can be automatically and reliably held during silver-gold processing of the material.

For this reason, special effects such as being able to significantly improve the processing capacity of an automatic sheet metal rolling machine while improving processing and finishing accuracy are achieved.

[Brief explanation of the drawing]

Figure 1 is a front view of an embodiment of this invention, and Figure 2 is Figure 1A.
-A cross-sectional side view, Figure 3 is a plan view of the chuck holder, and Figure 4 is a side view of the automatic roll machine.○

Claims (1)

[Scope of utility model registration request] In an automatic roll machine, the material is conveyed in front of the holder and attached to the holder using a push tip, and then processed into silver and gold using the first piece attached to the header shaft. A chuck holder having a plurality of grooves in the longitudinal direction of the main shaft is attached to the tapered member on the inclined part side, and the flange body on the end face of the chuck holder is fixed to the tapered member. A collet chuck for an automatic roll machine characterized by being elastically attached to a tapered member so as to protrude outward from an end face.