JPS6044243A - Tool changer for hobbing machine - Google Patents

Abstract

PURPOSE:To aim at the automation of a tool change in a hobbing machine, by making a clamp mechanism, having each of clamp claws being inserted into both ends of a hob arbor to which a hob is attached, rockable between a hob head and a hob stocker outside the hobbing machine with a link mechanism. CONSTITUTION:A hob built-up body 2 is released from a hob head 1. Next, a cylinder 21 is driven, rocking each of swing arms 16a and 16b, and a clamp mechanism 25 is shifted to the side of the hob head 1, then each of clamp claws 28a and 28b is inserted into taper holes 13 and 14 at both ends of a hob arbor 8 whereby the hot built-up body 2 is clamped therein. Then, the cylinder 21 is driven in the reverse direction, and the built-up body 2 is transferred to the side of a stocker 32. Afterward, the stocker 32 is indexed and shifted to some extent so that the required hob built-up body 2 is shifted to space between these clamp claws 28a and 28b. And, this built-up body is transferred to the hob head 1 via the arm as in the above-mentioned.

Description

[Detailed description of the invention] The present invention relates to a tool changing device for a hobbing machine.

Currently, replacing the tool hob on a hobbing machine is done exclusively by hand, but it is time-consuming and dangerous because the tools are heavy and installation requires precision. But there was. In order to solve all of these problems, to save labor in hobbing machine operation, to make hobbing machine operation unmanned, and to shorten and ensure tool change time, it is desired to implement automatic tool change in hobbing machines.

The present invention has been made in response to the above-mentioned needs, and its objectives are to automate or semi-automate tool exchange in hobbing machines, realize unmanned operation of hobbing machines, facilitate hobbing, and tool exchange. The purpose is to make it possible to shorten the time.

The gist of the present invention to achieve all of the above objects is that the post-clamp sound detection hob head, which has clamp claws inserted into both ends of the hop arbor to which the hob is attached, can be swung by a link mechanism between it and the hob stocker outside the hobbing machine. The tool changer consists of:

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a tool changing device according to the present invention will be described in detail based on an embodiment shown in the drawings.

FIG. 1 and FIG. 2 show N, which is an example of the application target of the present invention.
The front and side views of the C hobbing machine are shown. Reference numeral 1 denotes a hob head to which a hob and hob arbor assembly 2 is attached, and includes a hob spindle connected to one end of the hop arbor and driven to rotate, an arbor support supporting the other end of the hob arbor, and the like.

3 is a column to which the hob head 1 is attached, 4 is a sweeping board installed on the side of column 3, 5 is a counter column to which a workpiece is attached, 6 is a hydraulic system, and 7 is an electrical device such as an NC. .

In the tool changer according to the present invention, the entire hob and hop arbor assembly 2 is taken out from between the hob head 1 and the counter column 5 into the hydraulic system (6) (11) at the rear of the hobbing machine.

FIG. 3 shows an assembly 2 of a hob and a hob taber. In this assembly 2, a hob 9 is completely fitted into a hob taber 8 and fixed with a nut 10. In this assembly 2, the tapered part 10 and the tapped hole 11 at one end of the hob taper 8 are supported by the hob spindle 1) of the hob head 1, and the other taper part 12
is supported by the arbor support of the hob head 1. Further, tapered holes 13 and 14 are formed at both ends of the hob taber 8, and these are used as a reference for clamping when the assembly 2 is exchanged and sent.

FIGS. 4 and 5 show a front view of the device according to one embodiment, and FIG.
Figures 6 and 7 show some details.
hll k is shown. The back of column 3 of the hobbing machine (II
There are several bases 15 on the top of I, and on the front side there are two parallel swing gears A16a and 16b that form a link mechanism.
is rotatably supported by a pin shaft integrally attached to the end thereof, and sprockets (1.7a, 17b) are integrally attached to the pin shaft on the rear side of the base 15. is fixed to. sprocket) 17 a
.

One sprocket 18 is connected to the base 15 above between 17b.
One end of an arm 19 is fixed to the sprocket 18, and a piston rod of a cylinder 21 supported on the base 15 via a bracket 20 is attached to the other end of the arm 19. 22 tips are connected. Also, sprocket 18 and sprocket]
A chain 23 is attached to 7a and 17b. Therefore, the arm 19 swings due to the reciprocating movement of the piston rod 22 caused by the movement of the cylinder 21 in Ql, and the sprocket 18 rotates accordingly, so that the sprockets 17a and 17b are The swing arm 16a rotates together with the pin shaft integrated with these.
, 16b swings in the diameter of the column in the directions indicated by arrows a and b in FIG. A clamp support part 24 is connected to the other end of the swing arms 16a, 1 (jb) so that it can be lowered regardless of the position of the swing arms 16a, 16b. As shown in the figure, the clamp machine +1.425 is installed at g.Clamp machine it;
2s are two arms 2 (i; J, 26) whose one ends are rotatably connected to the lower part of the clamp support member 24
b, and arm 26a.

Clamp claws 28a and 28b, which are separated from each other (by facing each other and applying an inward spring force to each other by the spring 27) at the tip 9+ of 26b,
The clamp cylinder 29 i-b provided at the root [i4] of a, 26b, the piston rod 30 of the clamp cylinder 29, the arms 26a, 2 (i l), and the links 31 that are all 'J2': A'M, respectively. a, 3 l
The clamp claw blade is formed by the elongation of the piston rod 30 by the drive of the clamp cylinder 29.

28b is adapted to open and close. Clamp claw 28a
, 28b grips or releases the assembly 2 by opening and closing. Clamp claw 28a.

28b is opened by supplying hydraulic pressure in the direction of reducing the piston rod 30 to the clamp cylinder 29, and clamp claws 28a and 28b are closed by hydraulic pressure in the opposite direction.
The hob taper 8 of the assembly 2 is inserted into the taper holes 13 and 14 at both ends to grip the assembly 2, but the clamp cylinder 2
Even if the oil pressure to the clamp claws 2.8a, 28b7. It is possible to maintain it. First, safety precautions are taken against unexpected hydraulic pressure M. This clamp machine (yellow 25 is the swing arm 16a).

Due to the rocking of 16b, the hob head 1 and the back surface of the hobbing machine
It reciprocates between the stocker 32 installed at The stocker 3-2 is provided with a plurality of supports 33, one support 33 is an empty support for the hob compaction body 2 in use, and the other hob 33 holds a replacement assembly 2. be done.

In the stocker 32, a necessary support 33 is indexed and moved so as to be at a position for transferring the hob assembly 2 to and from the clamp mechanism 25. Similarly, stoppers 34 and 35 are provided on the swing arms 1' 6 a and 16 b, respectively, and these stoppers 34 and 35 are provided on the base 15 side =J:! l
By hitting the B screws 36 and 37, the transfer and reception positions of the hob assembly 2 at both ends of the moving range, that is, between the clamp clamp ÷; 725 and the hob head 1 side or the stocker 32 (till) are regulated. Of course, this position can be adjusted using adjustment screws 36 and 37.
A buffer rod 3 equipped with a buffer spring 38 is provided on the base 15 side.
9 is provided, and a swing arm 16a.

The piece 40 on the swing arm 16b hits the upper end of the buffer rod 39 near the end of rotation of the swing arm 16b, so that the impact is completely absorbed.

The hob assembly 2 is replaced by the tool changer
To replace the hob head 1, first remove the assembly 2 from the hob head 1 by removing one end of the hob bar 8 from the hob spindle and removing the lower end from the hob head 1.
Qi: Release. Next, the cylinder 21 is driven to fully swing the swing arms 16a and 16b, and the clamp mechanism 25 is moved toward the hob head 1, and its clamp claw 28a,
28b'Jf: Tapered hole 13.14 at both ends of hob taper 8
The assembly 2 is clamped and held by inserting it into the holder.

Next, the cylinder 21 is driven in the opposite direction to move the clamp mechanism 25 together with the swing arms 16a and 16'b to the stocker 32 side, and the clamp claws 28a' and 28b are moved.
k Open and place the hob assembly 2 on the support 33.

Thereafter, the stocker 32 is indexed and moved, and the required hob assembly 2 is moved between the clamp claws 28a and 2Bb.

After that, the young hob assembly 2 is clamped with the clamp claws 28a and 28b, and the clamp mechanism 25 is moved to the hob head 1 side together with the swing arms 16a and 16b by the drive of the cylinder 21, and the new hob assembly 2 is moved to the hob head 1 side. Attach to. After this, the clamp mechanism 25 is attached to the swing arm 16a.

16, b, and is swung together and placed on standby on the stocker 32 side. Therefore, the clamp machine #Nt 25 etc. does not get in the way during processing.

FIG. 8 shows another embodiment in which the hob head 1 is inclined.

In this device, a link 41 is attached to the clamp support member 24, a parallel link 42 is connected to the link 41, and a clamp mechanism +j'+ is attached to the link 42.
25k several times. This clamp 4@+', J,
1'(+25) is tilted to a predetermined angle by hand or by using a pneumatic or hydraulic cylinder. The replacement operation of the hob assembly 2 by this device is similar to the previous embodiment.

(ii) In the previous example, clamp ti&'5')2
(1) for swinging the (1) lever transmission means and (1) - sprocket) 17a.

17b, 18 and chain 23 are used, but a timing boot, timing belt, etc. may be used in place of these. In addition, the drive source is not limited to the cylinder 21, but a swing motor or the like may be used to drive the sprocket 18 at C'.
Alternatively, it may be connected directly to the pin shaft of the swing arm 16a or 16b.

As described above in detail based on the embodiments, according to the tool changer according to the present invention, the hob in the hobbing machine can be automatically exchanged or half-white! ? )) It becomes possible to play the role of the father, which shortens and reliably replaces the hob, and enables unmanned operation of the hobbing machine. In addition, the handling of the hob, which is a Japanese product for swords, has been automated, making the process easier. Furthermore, automatic machining using various scales using a hobbing machine is also possible. - force, clamp K IM
f: Since the link machine 174 is used as the rocking mechanism, the structure is simplified, and the machine can be made smaller than 111L, and the function of the bob board itself is not impaired.

[Brief explanation of drawings]

Figure 1 is a front view of the hobbing machine, Figure 2 is its side (fii diagram,
FIG. 3 is a sectional view of the hob assembly, FIG. 4 is a front view of an embodiment of the tool changer b' in a hobbing machine according to the present invention, and FIG. 7 is a partially enlarged view of FIG. 4, and FIG. 8 is a front view of another embodiment. In the drawings, 1 is a hob head, 2 is a hob assembly, 8 is a hob taper, 9 is a hob, 13.14 is a tapered hole, 15 is a base, 1 (ia, 16t) is a swing arm, 17a, 17b
, 18 is a sprocket. 19 is an arm, 21 is a cylinder, 23 is a chain, 24 is a clamp support member, 25 is a clamp machine (11, 28a, 28b are clamp claws, 29 is a clamp cylinder, 32 is a stocker. Patent applicant Mitsubishi Heavy Industries, Ltd. Provisional Representative Patent Attorney: Shibu Mitsuishi (1 other person) Figure 1 Figure 2 Figure 3 Figure 7 Figure 4 Figure 5

Claims (1)

[Claims] A hobbing machine tool characterized in that a clamp mechanism having clamp claws inserted into both ends of a hop arbor with several hobs cut thereon is movable by a link mechanism between the hob head and a hob stocker outside the hobbing machine. Exchange device.