JPS5815248B2 - Continuous broaching machine broach holder mounting stand lifting and reversing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Conventionally, there has been a continuous broaching machine that rotates a large number of workpiece mounting jigs arranged on an endless chain and cuts the workpiece with a broach placed parallel to the chain.

When replacing the broach on this broaching machine, the broach holder mounting base, which weighs more than 5 tons, had to be reversed using a crane, the broach was replaced, and the broach was set by reversing it again, which made the broach replacement work much easier. It was difficult and there was also a safety problem when lifting and reversing.

In addition, it takes time to replace the parts, which inevitably reduces the operating rate of the machine.

In this invention, a pair of pillars are erected on a broaching machine body provided with an endless chain, a broach holder mounting base is rotatably supported by a bracket housed in the pillar body so as to be able to rise and fall, and the broach holder mounting base is rotated. The present invention relates to a broach holder mounting stand lifting and reversing device for a continuous broaching machine which solves the above-mentioned conventional problems by providing a mechanism in the bracket.

Next, an embodiment of the present invention will be described with reference to the drawings. The main body 1 of the broaching machine is provided with a drive shaft 2 and a driven shaft 3, and an endless chain is connected to sprockets 4 and 5 attached to the drive shaft 2 and the driven shaft 3, respectively. 6 is installed.

A large number of workpiece attachment jigs 7 are disposed on the endless chain, and a workpiece (not shown) attached to the workpiece attachment jig is broached as the endless chain rotates.

Furthermore, a broach holder mounting base 8 is placed on the main body 1,
A broach holder 9 is fixed to face the endless chain 6, and a broach holder 10 is also attached to the ground surface of the broach holder mount 8.

11 and 12 are broaches attached to broach holders 9 and 10, respectively.

A plurality of notches 13 wider than the outer diameter of the nut 16 are formed in the upper and lower sides of the broach holder mounting base 8, and the mounting bolts 14 are screwed into the main body 1 through the notches 13 and the nuts 16 are screwed through the split washers 15. The broach holder 8 is fixed to the main body 1 by.

A pair of pillars 17a and 17b are erected on the main body 1, and a bracket 18a is inserted into each of the pillars 17a and 17b so as to be able to rise and fall.A central shaft 19a is fixed to the broach mount 8.
, 19b are rotatably supported by bearings 20.

A pin 21a is provided protruding from the bracket 18a.
a is a worm wheel 2 provided at the top of the column 17a;
It engages with a hanging ring 24a provided at the lower end of a threaded shaft 23a screwed in 2aK, and the bracket 18a moves up and down as the worm wheel 22a rotates.

25a is a worm that transmits rotation to the worm wheel 22-a.

A worm wheel 26 is attached to the tip of the center shaft 19a of the broach holder mount located on the bracket 18a side, and is engaged with a worm 27 incorporated in the bracket 18a. By turning 29, the broach holder mounting base 8
can be rotated.

30a is a lid provided on the top of the column 17a, which restricts the vertical movement of the worm wheel 22a.

Note that the columnar body 17b is connected to the worm wheel 26. It has the same structure as the column 17a except for the worm 27 and bundle 29.

When the motor 31 is driven as shown in FIG.

V-pulley 33 attached to rotating shaft 32, ■belt 34
The rotation is transmitted to the V-pulley 35 on the driven side.

Then, the shaft 36 to which the V-pulley 35 is attached rotates, rotating the bevel gears 37a and 37b fixed to both ends.

Further, the bevel gears 37a and 37b are connected to the bevel gear 4 which is fixed to the other end of the intermediate shafts 39a and 39b via bevel gears 38a and 38b.
Rotate 0a and 40b.

Next, a bevel gear 41a meshes with bevel gears 40a and 40b,
41b rotates, and the worm shaft 42a.

The worms 25a and 25b fixed to the worm 42b are rotated.

Then, the worm wheels 22a and 22b that mesh with the worms 25a and 25b rotate, and the worm wheels 22
The screw shafts 23a and 23b screwed into the screws a and 22b are raised and lowered in the direction of the arrow.

A replacement broach 12 is attached to the broach holder 10 and fixed on the broach holder mounting base 8 in advance.

When it becomes necessary to replace the broach 11, the continuous rotation of the endless chain 6 to which the workpiece mounting jig 7 is fixed is stopped.

Next, loosen several nuts 16 and remove split washers 15.

Here, the motor 31 is started and the V pulleys 33, 35 and bevel gears 37a, 37b, 38a, 38b, 40a are activated.

40b, 41a, 41b, and further a worm 25a.

The worm wheels 22a and 22b are rotated clockwise as viewed from above through the worm wheels 25b.

Then, since the screw shafts 23a and 23b do not rotate, they continue to rise, and the hanging ring 24a provided at the lower end of the screw shaft.

The brackets 18a and 18b are simultaneously raised via the pins 21a and 21b engaged with the brackets 24b.

Thus, the broach mounting base 8 is lifted up at the same time.

When the broach holder mounting base 8 rises to a position sufficient to be reversed, the rotation of the motor 31 is stopped.

Next, when the bundle 29 is turned by hand, the worm 27 is rotated, and the worm wheel 26 is rotated.
6, the broach holder mounting base 8 is gently rotated by 180° via the center shafts 19a and 19b, and the reversal is completed.

In this state, the motor 31 is reversed and the worm wheel 2
2a, 22b counterclockwise, screw shaft 23a,
23b is lowered δ, the broach holder mounting base 8 is lowered to the mounting position of the main body 1, insert the split washer 15, and tighten the nut 16.
Tighten to complete the replacement of the brooch.

In this way, cutting can be performed with the broach 12 instead of the broach 110, and continuous broaching can be performed again.

The broach 11 that has been positioned upward due to the reversal of the broach holder mounting base 8 can be replaced with another broach before the next broach replacement.

It goes without saying that instead of the hand-cranked bundle 29, automation can be achieved by using a motor.

As described above, this invention allows the broach to be attached by attaching the broach holder to both the upper and lower surfaces of the broach holder attachment base, and also includes the broach holder attachment base being attached to a bracket that is movably housed in a pair of pillars installed upright in the main body. Since it is supported, the installation is simply done by loosening the nut 16, removing the split washer 15, and rotating the motor.The gear mechanism allows the broach holder mounting base to be lifted via the bracket, and the broach holder mounting base is attached to the bracket. Since it is reversibly supported on the broach holder mounting base 0 center axis 1 after lifting,
Since the broach can be easily turned around 9a and 19b manually or by a motor, the time required for replacing the broach is reduced to about 1/3 compared to the conventional method, and it can be performed safely and reliably.

Moreover, since the broach can be attached to both the upper and lower sides of the broach holder mounting base, the broach can be attached and detached outside of actual working hours, which contributes to improving work efficiency.

It should be noted that attachment and detachment of the broach holder attachment base to the main body is easy as it can be done simply by loosening the attachment nut and split washer.

In addition, the bracket that supports the broach holder mounting base is also pin-engaged with the hanging ring of the screw shaft, so it can be raised and lowered reliably by a gear mechanism, which is much safer than when lifted and lowered by a crane. .

Note that the present invention is different from simply automatically replacing a plurality of broaches whose dimensions have already been controlled and which are attached to a plurality of broach holders; the present invention is different from simply automatically replacing a plurality of broaches that are already dimension-controlled and attached to a plurality of broach holders. When the broach needs to be replaced, the broach can be replaced, and the new broach can be held in the broach holder mount during broaching work after the broach has been replaced.

That is, the present invention makes it possible not only to replace the broach, but also to mount the broach to the broach holder mounting base via the broach holder in a dimensionally controlled manner even after the broach is replaced.

In surface broaching using a continuous broaching machine, the setting or attachment of the broach requires even stricter precision than general broaching, which requires extremely high precision, so it must be done carefully and over time.

This will preset the brooch into the brooch holder and
Even if it takes a little less time to replace this brooch holder, setting the brooch holder on the main body has the same accuracy problem and is heavy, so you need to carefully spend your time. Not only that, but there were safety issues.

For this reason, in any case, in a highly efficient continuous broaching machine, this time remains as unresolved idle time, and has become a problem as the biggest factor in lowering the operating rate of the machine.

The device of the present invention solves these problems,
The broach can be attached to both the upper and lower surfaces of the broach holder mounting base, and the upper and lower surfaces can be clamped at positions facing the endless chain relative to the main body, so that the broach holder with the broach set can be The attached upper and lower surfaces can be exchanged very quickly and safely, and after exchanging the broach, it is possible to set the dimensions of the new broach on the other surface of the upper and lower surfaces while the broach is being worked. Although it is a simple device, it is extremely effective in reducing the above-mentioned unresolved immobility time.

[Brief explanation of the drawing]

FIG. 1 is a side view of an embodiment of the present invention with main parts cut away, FIG. 2 is a partial plan view as seen from direction A in FIG. 1, and FIG.
The figure is a sectional view taken along the line BB in FIG. 1, and FIG. 4 is a drive system diagram. 1... Main body, 2... Drive shaft, 3... Driven shaft, 6...
... Endless chain, 7... Workpiece mounting jig, 8...
Brooch holder mounting base, 11...Broach, 12...
・Broach, 13... Notch, 14... Mounting bolt, 15... Split washer, 16... Nut, 17... Column, 18 Bracket, 21... Pin, 22... Worm Wheel, 23...Screw shaft, 24...Hanging ring.

Claims (1)

[Claims] 1. An endless chain with a large number of workpiece attachment jigs arranged, a main body equipped with a drive shaft and a driven shaft that drive the chain,
A continuous broaching machine consisting of a broach holder mounting base that can be clamped to the main body and holds the broach above an endless chain, and a bracket that has a pair of pillars erected on the main body and is housed in the pillars so that it can be raised and lowered. The broach holder mounting base is reversibly supported, and the broach can be held on both the upper and lower sides of the broach holder mounting base, and both upper and lower surfaces can be clamped at positions facing the endless chain relative to the main body. This is a broach holder mount lifting and reversing device for a continuous broaching machine, in which the bracket is equipped with a mechanism that inverts the broach holder mount when the bracket is raised.