JPS5920910Y2 - Simple attachment/detachment device for work arbor - Google Patents

Description

[Detailed description of the invention] This invention relates to a simple attachment/detachment device for a work arbor such as a hobbing machine or a worm screw cutting machine.

Processing machines equipped with a work arbor, such as hobbing machines, have the disadvantage that it takes time and effort to attach and detach the work arbor.

Here, we will first discuss this disadvantage using a hobbing machine as an example.

A conventional hobbing machine as shown in FIG. 1 is known.

As shown in FIG. 1, this type of conventional hobbing machine includes a work arbor 1, a rotary table 2, a hob 3, a first carriage 4,
It consists of a second carriage 5, a bed 6, a column 7, etc.

The work arbor 1 is fixedly attached to the rotary table 2, and a gear material (not shown) is fixedly attached to the work arbor 1.

During gear cutting work, the gear material is rotated together with the work arbor 1 based on the rotation of the rotary table 2, and at the same time,
Rotate hob 3.

Then, the gear material is gradually cut with the hob 3 to perform gear cutting.

The first carriage 4 reciprocates horizontally with respect to the head 6, and the second carriage 5 reciprocates vertically with respect to the column 7.

By the way, in this type of hobbing machine, if the work arbor 1 is deviated from the rotation axis of the rotary table 2, accurate gear cutting cannot be performed.

For this reason, when attaching the work arbor 1 to the rotary table 2, it was necessary to perform centering accurately.

Since this centering work requires a long time, for example, one hour, the workability is extremely poor.

This idea was made taking these circumstances into consideration, and provides a new simple work arbor attachment/detachment device that allows for perfect alignment with the rotation axis of the rotary table without the need for complicated centering work. The purpose is to allow the work arbor to be mounted on a rotary table in a coaxial arrangement.

This invention has a threaded portion formed at one end of the work arbor in order to achieve this objective.

A screw member is rotatably attached to the rotary table; and the screw member and the threaded portion are engaged with each other at a position where one end of the work arbor is attached.

Furthermore, the screw member is rotated by the operating portion, thereby attaching and detaching one end of the work arbor to and from the screw member.

Hereinafter, we will explain an example in which this invention is applied to a board.

FIG. 2 shows the work arbor attachment device 8 of the hobbing machine of this embodiment.

This work arbor attachment device 8 is for attaching the work arbor 1 to the rotary table 2.

Note that the other configurations of this embodiment are the same as those shown in FIG. 1, so their explanation will be omitted.

In FIG. 2, the work arbor attachment device 8 has a main body 9.
, a bottom cover 10, an attachment/detachment bolt (screw member) 11°, a worm wheel 12, a worm 13, a worm shaft (operating portion) 14, and the like.

The main body 9 has a cylindrical outer shape with a flange at the lower end.

Further, an inner chamber 15 opened toward the lower end is formed inside the main body 9, and an inner chamber 15 is formed therein, and a detachable bolt 11. A worm wheel 12 and the like are arranged.

Furthermore, through holes 1 are provided from the upper end and side surface of the main body 9, respectively.
6.17 (see Figure 3) is formed up to the inner chamber]5.

The through hole 16 is tapered so that the through hole 1
The diameter of No. 6 is smaller towards the back.

The bottom lid 10 is formed into a substantially disk shape, and has three notches 18 (one of which is shown in the figure) formed on its outer periphery, and a through hole 19 formed at its center.

The main body 9 is fixed to the bottom cover 10 by a pole 1-20, and the worm 13 and the worm wheel 12 are arranged so as to mesh with each other in this fixed state.

This point will be explained in detail later.

Further, by placing bolts 21 in the notches 18 of the bottom cover 10 and screwing these bolts 21 into female threaded portions (not shown) of the rotary table 2 (see FIG. 1), the bottom cover 10 integrated with the main body 9 can be opened. It can be fixed to the rotary table 2.

Moreover, since this screwing is done through the notch 18,
The attachment position of the bottom cover 10 to the rotary table 2 can be adjusted.

Next, the attachment/detachment bolt 11°, worm wheel 12, worm 13, etc. inside the inner chamber 15 of the main body 9 will be explained.

The attachment/detachment ports 1 to 11 are screwed into the female threaded portion (threaded portion) 22 of the work arbor 1.

A male threaded portion 23 is formed at the upper end of this attachment/detachment bolt 11, and a collar 24 is attached to its lower end.

When this collar 24 is placed on the bushing 25, the male threaded portion 23 is located within the through hole 16.

The worm wheel 12 is fixed to the attachment/detachment bolt 11 by a key 26, and is held down from above by a bushing 27.

Further, the worm] 3 is arranged so as to mesh with the worm wheel 12.

That is, as shown in FIG. 3, a worm shaft 14 is rotatably attached to the main body 9 by a bearing 28 and a bush 29, and the worm 13 is fixed to the worm shaft 14 by a key 30.

One end of the worm shaft 14 is located in the through hole 17,
This allows the worm shaft 14 to be rotated from outside the main body 9.

In FIG. 3, 31 is a nut, 32 is a spacer, and 33 is a taper pin.

Next, the operation of this embodiment will be explained.

In FIGS. 2 and 3, when the main shaft 1 is clamped and attached to the rotary table 2, it is necessary to perform centering work.

First, the notch 1 in the bottom cover 10 of the work arbor mounting device 8
8 is used to temporarily fix the work arbor mounting device 8 to the rotary table 2.

After this, centering is performed using the wall surface of the through hole 16 of the main body 9.

After completing the centering work as described above, bolt 21
to be fixed.

Thereafter, the lower end of the work arbor 1 is inserted into the through hole 16 of the main body 9 of the work arbor mounting device 8.

After that, when the worm shaft 14 is rotated in the tightening direction, the worm wheel 12 is rotated by the worm 13, and as a result, the male threaded portion 23 of the attachment/detachment bolt 11 is screwed into the female threaded portion 22 of the main shaft 1. To go.

Therefore, it is fixed to the work arbor 1 or the work arbor attachment device 8.

As described above, the first installation of the work arbor 1 is completed.

Next, a case will be described in which the work arbor 1 installed for the first time is replaced with another work arbor 1.

In this case, first, the first work arbor 1 is removed from the work arbor attachment device 8.

That is, rotate the worm shaft 14 in the removal direction,
As a result, the female threaded portion 22 of the work arbor 1 and the male threaded portion 23 of the attachment/detachment bolt 11 are unscrewed.

Eventually, when the work arbor 1 and the attachment/detachment bolt 11 are unscrewed, the work arbor 1 is pulled out from the through hole 16.

As described above, the main spindle 1 is removed from the work arbor attachment device 8 for the first time.

Next, the work arbor 1 is attached to the work arbor attachment device 8 for the second time.

This operation is the same as that for the first work arbor 1, so the explanation will not be repeated.

Note that when the work arbor 1 is attached for the second time, the work arbor attachment device 8 has already been attached to the regular position, so there is no need to perform centering after the attachment.

As described above, the replacement of the work arbor 1 is completed.

Note that, from now on, when replacing the work arbor 1, it is not necessary to perform centering in the same manner.

As described above with respect to one embodiment, the work arbor simple attachment/detachment device of this invention has a threaded portion formed at one end of the work arbor.

A screw member is rotatably attached to the rotary table, and the screw member and the threaded portion are engaged with each other at a position where one end of the work arbor is attached.

Further, the screw member is rotated by the operating section, thereby attaching and detaching one end of the work arbor to and from the screw member.

Therefore, if the position of the screw member is adjusted and centered when installing the work arbor for the first time, then when replacing the work arbor, the screw member and the threaded part of the work arbor can be aligned. There is no need for centering by simply aligning and removing the screws between the two.

Therefore, work efficiency is improved.

[Brief explanation of drawings]

Fig. 1 is a side view schematically showing a conventional hobbing machine, Fig. 2 is a longitudinal sectional view showing a work arbor mounting device 8 according to an embodiment of this invention, and Fig. 3 is taken along line III in Fig. 2. FIG. 1...Work arbor, 2...Rotary table, 3...Hob, 11...Nether member (bolt for attachment/detachment), 14... - Operation part (worm shaft), 22... Threaded part (female threaded part of work arbor 1).

Claims (1)

[Scope of utility model registration request] A processing machine in which a work arbor to which a work is attached is removably fixed at one end to a rotary table, and the work is cut while rotating based on rotation of the rotary table. a threaded portion rotatably attached to the rotary table and engaged with the threaded portion at a position for fixing one end of the work arbor; 1. A simple attachment/detachment device for a work arbor, comprising an operation section for attaching and detaching one end of the main shaft to and from the screw member.