JPS5854930B2 - Turret. broaching machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a broaching machine in a machine tool.

A broaching machine is a tool that slides a broaching tool, which has many cutting edges along the length of the tool, against the workpiece, and in one pass of the broaching tool, the many cutting blades cut small amounts. , the workpiece is usually finished into the shape of a finished blade.

Therefore, a broaching tool installed on a conventional broaching machine is equipped with both a roughing edge and a finishing edge along one longitudinal direction, and the tool itself becomes long, which inevitably leads to the following problems. was occurring.

That is, (a) the broaching tool is long and cannot be divided, so the broaching machine itself becomes large.

(b) The force stroke becomes longer.

(/→, Since the broaching tool is large and heavy, tool replacement time becomes longer.

), the burr process of the machining stroke does not involve cutting, so there is a lot of wasted time.

In order to solve the problems of the conventional device described above, the present invention improves the energy saving effect, increases the proportion of actual cutting time in the total cycle time, shortens tool change time, and increases the operating rate of the machine. The purpose is to improve the overall efficiency of the broaching machine by improving the efficiency of the broaching machine.

The broaching machine of the present invention that meets this purpose is provided with a rotary turret body, and a turret indexing device for determining the rotational position of the turret body is provided at the cutting position in a fixed position.
A slide feeding device is provided in which a plurality of broaching tools are respectively attached to the turret body according to the cutting purpose at each of the rotational positions of the turret body, and the workpiece is reciprocated relative to the turret body by passing over the cutting position. established,
The present invention is comprised of a turret broaching machine characterized in that the indexing of the rotational position of the turret body to the cutting position is matched to the forward movement and backward movement of the object to be cut.

Embodiments of the turret broaching machine of the present invention will be described below with reference to the drawings.

In Fig. 1, the turret broaching machine A consists of a turret indexing device B and a slide feeding device C. The turret indexing device B is shown in Fig. 3, and the slide feeding device C is shown in Fig. 4. Shown in detail.

In FIGS. 1 and 3, a turret indexing device B includes a turret body 1 having a rotating shaft extending in a direction parallel to the sliding direction of a workpiece, and a turret body 1
A rotation drive means, such as a hydraulic motor 2, for rotating the turret at an appropriate angle, a flange 3 disposed at both ends of the turret body so as to rotate together with the turret body, and a notch 4 provided at the peripheral edge of the flange 3. , a wedge 5 that is inserted into or removed from the notch 4, and a wedge driving means, such as a hydraulic cylinder 6, that moves the wedge 5 forward and backward with respect to the notch 4.

A plurality of broaching tools 7 are attached to the outer surface of the turret body 1 depending on the cutting purpose. When the turret body 1 is fixed, the broach tool 7 attached to the turret body 1 is in the cutting position, that is, the wave cutting is slid.

The object to be cut is placed in a position to be cut by the broach tool 7.

The broaching tool 7 may have a roughing blade 1a and a finishing blade 1b formed separately, and each may be attached to a different rotational position on the turret body 1, or a different brooching tool may be used depending on different types of workpieces. The turret body 1 may be mounted at different rotational positions.

Among the broaching tools 7 attached to the turret body 1, those that are not in the cutting position are moved by the brush 8 to the tool T.
The cutting chips remaining between the blades are removed and cleaned.

9 is a hydraulic cylinder that raises and lowers the brush 8.

The broach tool 7 may also be adapted to be replaced at a position removed from the cutting position.

On the other hand, as shown in FIGS. 1 and 4, the slide feeding device C includes a slide guideway 11 fixed to a base 10, a slide table 12 guided along the slide guideway 11, and a slider. table 12
It consists of a ball screw 13 that engages with the slide table 12 to drive the slide table 12, and a DC motor 15 that rotationally drives the ball screw 13 via a gear box 14.

A workpiece W to be cut is fixed to the slide cheeple 12 .

The slide table 12 is horizontally reciprocated relative to the turret body 1 in the cutting direction of the workpiece.

The reciprocating movement of the slide table 12 and the indexing of the turret body 1 to the cutting position by the turret indexing device B are linked.

For example, when the turret body 1 is equipped with the broaching tool 7a having a rough blade and the broaching tool 7b having a finishing blade, when the slide table 12 slides forward, the broaching tool γa with the rough blade is in the cutting position. When the slide table 12 makes a reverse sliding movement, the finishing blade broaching tool 7b is in the cutting position.

In addition, the apparatus is provided with a coolant tank 16, through which cooling oil is sent to the part where the workpiece W is processed by the broacher tool 7.

FIG. 2 shows a different embodiment from FIG. 1.

In FIG. 1, the rotation axis of the turret body 1 extends in the sliding direction of the workpiece, but in the embodiment shown in FIG. 2, the rotational axis of the turret body 1 extends in a direction perpendicular to the sliding direction of the workpiece.

With the configuration as shown in FIG. 2, the broaching tool 7 can also be brought to the cutting position by rotating the turret body 1.

Except for the direction of the rotation axis of the turret body 1, the configuration of the embodiment shown in FIG. 2 is similar to that of the embodiment shown in FIG.
Explanation will be omitted by assigning the same reference numerals as those in the figure.

The operation of the device having the above configuration is as follows.

First, the workpiece W is placed on the slide table 12, specifically, on the workpiece holder installed on the slide table 12.
Attach and secure.

Next, the DC motor 15 operates and the gear box 14
The ball screw 13 rotates through the slide table 1
2, and start cutting feed a little before broaching.

At the same time as the cutting feed starts, cutting oil is sent from the coolant crank 16 and applied to the broach tool 7 and the workpiece W to be cut.

The workpiece W placed on the slide table 12 and the broaching tool 7a match, and the workpiece W is roughly cut in accordance with the cutting feed of the slide table 12.

At the forward end of the slide table 12, the wedge 5 of the turret indexing device B is extracted by the hydraulic cylinder 6, and the turret body 1 is rotated and indexed by the hydraulic motor 2.

Here, the wedge 5 enters the notch 4 again by the hydraulic cylinder 6 and the coolet body 1 is fixed.

Next, the DC motor 15 reverses and the slide table 12
The finishing broach tool 7b installed in the coolet indexing device B moves the workpiece W
Finish cutting.

When cutting is completed, the workpiece is unclamped and
The turret body 1 rotates and returns to its original position where the rough blade 7a is in the cutting position.

Since the turret broaching machine of the present invention is constructed and operates as described above, it achieves the various effects described below.

(b) For example, a broaching tool for rough cutting and a broaching tool for finishing can be attached to the turret body at each rotational position of the turret main body, so conventionally a rough cutting tool and a finishing broaching tool can be attached to one broaching tool. Compared to the case where the
The length of one probing tool can be shortened.

(b) Therefore, the machining stroke of the reciprocating movement of the cut object can be reduced accordingly, the turret broaching machine itself can be downsized, and costs can be reduced.

Furthermore, since the probing tool itself is small and lightweight, replacing the probing tool becomes easy, and the time required to replace the broach can be greatly shortened compared to the conventional method.

←→ Since both the forward and backward movements of the workpiece relative to the turret body are used for cutting the workpiece itself, compared to the conventional case where the backward movement could not be used to cut the workpiece, The actual cutting time ratio is increased to improve the operating rate of the machine, and unnecessary drive is also reduced, resulting in less power loss and improved energy-saving effects.

Furthermore, a turret indexing device equipped with a mechanism for rotating the turret body and indexing its rotational position is installed in the fixed position, and the workpiece that is usually considerably smaller in weight than this turret indexing device can be moved freely. The energy saving effect can also be improved.

The overall effect of these efforts is to improve overall efficiency, which is the ultimate goal of engineering.

[Brief explanation of the drawing]

1 is a plan view of one embodiment of the turret broaching machine of the present invention, FIG. 2 is a plan view of another embodiment of the turret broaching machine of the present invention, and FIG. 3 is a plan view of the turret of the turret broaching machine of the present invention.・Perspective view of the turret indexing device of the broaching machine,
FIG. 4 is a partial sectional view of the slide feeding device of the turret broaching machine of FIG. 1. The meanings of the upper symbols in the figure are as follows. A...Turret brooch board, B...
・Turret indexing device, C...Slide feeding device, ■...Turret body, 2...
...Hydraulic motor, 3...Flange, 4...
...Notch, 5...Wedge, 6...
Hydraulic cylinder, γ...Broach tool, 7a...
... Rough blade, γb ... Finishing blade, 10...
... Base, 11" ... Slide guideway, 12 ... Slide table, 15 ...
...DC motor.

Claims (1)

[Claims] 1. A rotary turret body is provided, and a turret indexing device for indexing the rotational position of the turret body is provided at the cutting position, and a plurality of broaching tools are attached to the turret body in accordance with the cutting purpose, respectively. A slide feed device is installed at each position and reciprocates the workpiece to the turret body by passing it over the cutting position, and indexes the rotational position of the turret body to the cutting position by reciprocating the workpiece to the cutting position. and a turret broach machine that is tailored to each of the double-strokes.