JPS603543B2 - Automatic tool changer for hobbing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic hop changing device in a hop machine.

The purpose of replacing the hob on a hobbing machine is in the following cases.

That is, there are cases where the hob is worn out and cases where the machining specifications have changed.

In either case, replacement and set-up have traditionally been done manually, which takes a lot of time. The power train of the secondary hobbing machine was a mechanical type as shown in Figure 1.

In FIG. 1, d is a work table, e is an indexing gear device, f is a differential device, g is a main motor, h is a hob spindle, i is a hob, and j is a bof arbor support. In addition, the power train of a conventional hop board is as shown in Figure 2.
There was also a /C type.

In Fig. 2, k is a DC pulse motor for vertically feeding the hob head.
m, n' are pulse encoders, q is a DC motor for driving the hob, r is a DC pulse motor for feeding the work table, S is a DC pulse motor, and t, u are pulse encoders.
In these conventional hobbing machines, the hop spindle portion merely serves as a rotary power transmission line for rotating the hob.

Therefore, automatic replacement of the hob was not possible.

The present invention has been made in view of the above circumstances, and its purpose is to be able to automatically replace the hob by mechanical means rather than manually, thereby shortening the time for replacing the hob and improving the speed of the hobbing machine. To provide an automatic tool changer for a hobbing machine that not only can improve the operating rate but also can easily automatically change a hop even if the main axis direction of the hob is variously different from the horizontal direction.

Hereinafter, the present invention will be explained with reference to FIG. 3 and subsequent figures.

23 in the drawing is a hob saddle, and this hop saddle 23
A sliding portion 23' is formed on the right side of the slider 1, and a slider 14 is slidably provided in this sliding portion 23'. A long hole 14a that is long in the vertical direction is formed in the slider slot 4. Further, a stopper 14' is provided at the upper end of the slider 4. A lift cylinder 7 of the transfer mechanism A is fixed to the upper end of the slider 14. A shift cylinder 3 and a gear 3a are attached to the rod 7a side of the lift cylinder 7, and a take-out arm 5 is provided on the rod of the shift cylinder 3. 4 is a swing cylinder provided in the fuselage (not shown), and a rack 6, which is an example of a rod, of the swing cylinder 4 is meshed with the gear 3a.

An intermediate receiving hole b serving as an intermediate receiving part B is provided at the upper end of the slider 14. The hop saddle 23 is provided with a hob spindle saddle 22 that swings within the adjustment range of the hob lead angle 8 about point 0 as a fulcrum, and this hob spindle saddle 22 is provided with a lead angle adjustment mechanism C.

This lead angle adjustment mechanism C includes a pin 20 provided on a hob spindle saddle 22, and this pin 20 is slidably inserted into the elongated hole 14a. The hob spindle saddle 22 is provided with a hob spindle mechanism D as shown in FIGS. 4 and 5. This hob spindle mechanism D includes a hob shift slide 40, and a hob spindle 26 is rotatably provided on this hob shift slide 40. A hob arbor tightening screw 41 is provided in the hob spindle 26 . Further, the hob shift slide 40 is provided with a hob arbor support 43.

The hop 25 has one end of the hob arbor 25a fixed to the hob arbor support 43 by a tightening nut 44, and the other end of the hob arbor 25a is screwed into the hob arbor cotton screw 41.

Therefore, when replacing the hob 25, the tightening nut 44
Loosen the hob arbor support 4 from the hob arbor 25a.
3 and remove the hob 25 from the hob arbor 25a. B in the drawing is a moving mechanism, and the moving mechanism E is equipped with a lift cylinder 6, and the base of this lift cylinder and cylinder 16 is rotatably and slidably inside the hole 61 of the plate 60 provided with the slider 4'. It is fixed to a shaft body 46 inserted into.

This shaft body 45 is rotatably provided on the hob spindle saddle 22. A gear 46 is fixed to the shaft body 45, and a rack 19 of a rod of the swing cylinder 15 provided on the spindle saddle 22 is engaged with the gear 46. The shift cylinder 1 is attached to the rod 16a of the lift cylinder 6.
2 is fixedly installed, and a stopper 24 is fixedly installed on this shift cylinder 12. Rod 1 of shift cylinder 2
A gear 47 and a shift cylinder 8 are attached to the rod 8a of the shift cylinder 8, and a take-out arm 13 is attached to the rod 8a of the shift cylinder 8.
is provided. The swing rack 10 of the swing cylinder 1, which is supported by the same support body (not shown) as the lift cylinder 16, is engaged with the gear 47. F in the drawing
is a hob magazine mechanism, and this hob magazine mechanism F
is equipped with a hob magazine 1 rotatably mounted on a support shaft 47, and this hob magazine 1 is rotated by the drive of a swing motor 2. A replacement hob 25 is mounted on the hob magazine 1. Next, the operation will be explained.

Now, while the swing cylinder 15 is actuated to move the entire moving mechanism B in the downward direction of the arrow in FIG. The hob 25 is gripped by the take-out arm 13 in a rotated state.

The hob 25 is removed from the hob arbor 25a. From this state, the swing cylinder 5 is operated in the opposite direction to the above to move in the upward direction of the arrow, and the other swing cylinder 11 is operated to direct the take-out arm 13 to the right in FIG.

Now, the hob spindle 22 is swung around the fulcrum 0 so that the bush line T of the hob spindle 26 is a.

When it is attached, the slider 14 moves by 8 in the x direction.
While the lift cylinder 16 moves, the distance between the base point of the lift cylinder 6, that is, the distance between the shaft body 45 and the fulcrum 0, is kept constant due to the relationship between the shaft body 45 and the elongated hole 61. Therefore, the relative relationship between the take-out arm 13 and the intermediate receiving hole b and the relative relationship between the take-out arm 13 and the hob spindle 26 are constant regardless of the indexing angle 81. When the lift cylinder 16 rotates, the lift cylinder 6 comes into contact with a stopper 48 fixed to the hob spindle saddle 22, and the positional relationship between the take-out arm 13 and the hob spindle saddle 26 becomes constant.

Also, when the hob spindle saddle 22 is swung, the vertical position of the take-out arm 13 may shift, but by loosening the stopper 24 against the stopper 14' provided on the slider 14, the vertical position of the take-out arm 13 can be kept constant. drooping

By doing so, the angle of the hob spindle saddle 22 can be adjusted as required depending on the lead angle of the hob 25 and the helix angle of the gear to be machined.

The hob 25 held on the take-out arm 13 is connected to the shift cylinder 12, the swing cylinder 11 and the lift cylinder 1.
6, it is inserted into the intermediate receiving hole b. Next, the take-out arm 5 is controlled by the shift cylinder 3, the swing cylinder 4, and the lift cylinder 7, and the take-out arm 5 moves the hob 25 from the intermediate receiving hole b to its original position in the hob magazine.

Next, the hob magazine having the specified hob 25 is rotated by the rotation motor 2, and the specified hob 25 is stopped at the take-out position.

The hob 25 at the hob magazine take-out position is attached to the hob spindle 26 by performing a series of operations in reverse of the above-described series of operations for moving the hob 25 on the hob spindle 26 to its original position in the hob magazine 1.

As shown in FIG. 6, the drive section of the hob spindle mechanism D includes a first clutch 51 in the transmission system from the orientation motor 50 to the hob spindle 26, and a second clutch 52 in the transmission system from the main motor to the hob spindle 26. and a position confirmation switch 53 at the end of the hob spindle 26. By combining these, the rotation of the hob spindle 26 can be indexed and stopped at a certain position.

As described in detail above, the present invention includes a hob magazine machine side F provided on the machine body on which a plurality of replacement hobs 25 are mounted and a predetermined hob 25 positioned at the take-out position; A hob spindle mechanism D that releasably holds the hob 25 and rotates the hob 25, and a hob 25 provided in the machine body and held by the hob spindle mechanism D is moved to an intermediate receiving area B, and the hob 25 is moved to an intermediate receiving area B. A moving mechanism E that moves the transferred hob 25 to the hob spindle mechanism D, and a moving mechanism E that transfers the hob 25 located in the intermediate receiving part B provided on the machine body to the hob magazine mechanism F, and a hob that is at the take-out position of the hob magazine mechanism F. A transfer mechanism A that transfers the hob 25 to the intermediate receiving part B, and a lead angle adjustment mechanism C that is provided in the machine body and adjusts the lead angle of the hob 25 in the moving mechanism E in accordance with the helix angle of the gear to be processed. This is an automatic tool changer for hobbing machines.

Therefore, the replacement hob 25 on the hob magazine mechanism F side can be transferred to the hop spindle mechanism D side, and the hob 25 on the hop spindle mechanism D side can be transferred automatically by mechanical means instead of manually. It can be carried out.

Therefore, it is possible to shorten the hob replacement time and improve the operating rate of the hobbing machine. In addition, when replacing the hob 25, the lead angle of the hob 25 can be adjusted according to the helix angle of the gear being machined, so even if the main axis direction of the hob 25 is different from the horizontal direction, the hop 25 can be automatically adjusted. Easy to replace.

[Brief explanation of the drawing]

Figures 1 and 2 are explanatory diagrams of the power train of a conventional hobbing machine, Figure 3 is an explanatory diagram of the configuration of an embodiment of the present invention, Figure 4 is a longitudinal sectional view of the hob spindle mechanism, and Figure 5 is a FIG. 4 is a view taken from the direction of arrow V, and FIG. 6 is an explanatory diagram of the configuration of the drive section of the hob spindle mechanism in the automatic tool changer according to the present invention. A is a transfer mechanism, B is an intermediate receiving part, C is a lead angle adjustment mechanism, D is a hob spindle mechanism, E is a movement mechanism, F is a hob magazine mechanism, and 25 is a hob. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] 1. A hob magazine mechanism F provided on the machine body for mounting a plurality of replacement hobs 25 and positioning a predetermined hob 25 at a take-out position, and a hob magazine mechanism F provided on the machine body for detachably holding the hob 25 and Hob spindle mechanism D that rotates
and a moving mechanism E that moves the hob 25 provided on the machine body and held by the hob spindle mechanism D to the intermediate receiving part B, and moves the hob 25 transferred to the intermediate receiving part B to the hob spindle mechanism D, The hob 25 in the intermediate receiving part B provided on the machine body is transferred to the hob magazine mechanism F, and the hob 25 in the take-out position of the hob magazine mechanism F is transferred to the intermediate receiving part B.
A transfer mechanism A that transfers to
An automatic tool changer for a hobbing machine, characterized in that it is equipped with a lead angle adjustment mechanism C that adjusts the lead angle of the hob 25 in accordance with the helix angle of the gear being machined.