JPH05177429A - Broaching machine with automatic tool replacing device - Google Patents

Abstract

PURPOSE:To automatically change many kinds of broaching cutters by providing a horizontal driving means for reciprocating a slider integrally having a tool head for holding the upper end part of a broaching cutter and a vertical driving means for raising and lowering the tool head between a working position and a tool changing position above a tool magazine. CONSTITUTION:When a broaching cutter 16 is changed, the number of a tool to be newly changed is selected. Then, a slider 14 having a tool head 17 is first moved from a working position A to a tool changing position B, and the part capable of receiving a tool of a tool magazine 25 is positioned to the tool changing position B. The tool head 17 is lowered by a vertical driving means 18 provided on the slider 14 to receive the broaching cutter to be removed to a determined position in the tool magazine 25, and the tool head 17 is then raised. The broaching cutter to be newly changed is set in the tool changing position B, and the upper end of the new broaching cutter is held by the tool head 17 and moved to the working position A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broaching machine equipped with a tool changing device capable of automatically changing a plurality of types of broaching cutters.

[0002]

2. Description of the Related Art A broaching machine capable of automatically exchanging tools is disclosed in JP-A-60-44214. The configuration of this broaching machine is as shown in FIG. 2, and one lifter slide 1 is attached to the center of the frame 1 so as to be vertically movable. A support bracket 2 is integrally attached to the front surface of the lifter slide 1. The lower end of the support bracket 2 is notched, and rail plates are horizontally attached to the lower ends of both sides (front side and rear side in FIG. 2) of the support bracket 2 so that one side of each of the support plates extends inward. Further, at the same height as the upper limit of the support bracket 2, the fixing brackets 3 and 3 are provided on both sides of the column portion that supports the lifter slide 1 so that the lifter slide 1 can move up and down.
Is provided, the lower end portion of each fixed bracket 3 is cut out similarly to the support bracket 2, and rail plates are horizontally attached to the lower end portions on both sides thereof.

The support bracket 2 has a broach cutter 4 whose upper end is gripped by a lifter 5, and a slide plate 6 which is provided on the upper portion of the lifter 5 perpendicularly to the axis line. At the notched portion of the lower end of the rail, the rail plate is inserted horizontally and suspended vertically. Also, the fixing brackets 3 provided on both sides
One of the two is a replacement brooch cutter 7 whose upper end is gripped by the lifter 5 and the slide plate 6 provided on the lifter 5 is inserted into a notched portion on the rail plate to be vertical. It is hung on. Cylinders 8 and 8 are provided on the fixed brackets 3 and 3, respectively, so that a slide plate 6 inserted into a notched portion of each fixed bracket 3 can be horizontally pushed in the direction of the support bracket 2. ing.

When the broach cutter 4 is replaced with the replacement broach cutter 7, the lifter slide 1 provided with the support bracket 2 is lifted so that the support bracket 2 reaches the same height as the fixed brackets 3, 3. Ascending, the push bar 9 provided on the upper end of the lifter slide 1 comes into contact with the limit switch 10 to stop ascending, and the fixing bracket on the side on which the replacement broach cutter 7 is suspended (left side in FIG. 2). The cylinder 8 provided on the drive roller 3 is driven to push the slide plate 6 on the side of the replacement broach cutter 7 toward the support bracket 2. The pushed slide plate 6 is replaced at the same time as the slide plate 6 on the side of the broach cutter 4 suspended from the support bracket 2 is pushed out from the support bracket 2 and inserted onto the rail plate of the other fixed bracket 3. The broach cutter 7 is attached to the support bracket 2 and automatically replaced.

[0005]

However, in the above-mentioned conventional broaching machine capable of automatically changing tools, the same number of fixing brackets 3 and cylinders 8 as the number of broaching cutters 4 and 7 and supporting brackets 2 are provided. Since it is necessary to place the broach cutters so as to face each other, there is a problem that when the number of types of broach cutters for replacement increases, the device becomes large, the structure becomes complicated, and the cost is significantly increased.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a broaching machine with an automatic tool changer capable of automatically changing a large number of broaching cutters.

[0007]

As means for solving the above problems, a broaching machine with an automatic tool changer according to the present invention is provided with at least one of a work and a broach cutter.
In a broaching machine that cuts a workpiece into a predetermined shape by raising or lowering it relative to the other, a ram that is fixed to the workpiece and that can be moved up and down at the processing position, and a plurality of replacements A slider integrally provided with a tool magazine for accommodating the broach cutter and provided in the vicinity of the processing position, a tool head for holding the upper end of the broach cutter, and a vertical drive means for moving the tool head up and down, and the slider. Is provided with horizontal driving means for reciprocating between the machining position and the tool exchange position above the tool magazine.

[0008]

With the above construction, in the broaching machine with the automatic tool changer of the present invention, for example,
With the lower end side of the broach cutter with the upper end gripped by the tool head being engaged with the work fixed to the ram,
The work is cut into a predetermined shape by raising the ram. And when replacing the broach cutter, first select the number of the tool to be replaced.
The slider provided with the tool head moves from the processing position to the tool replacement position, and the tool-storable portion of the tool magazine is aligned with the tool replacement position.
Next, the tool head is lowered by the vertical driving means provided on the slider, and the broach cutter to be removed is housed in a predetermined position in the tool magazine, and then the tool head is raised. Then, after the part in which the broach cutter to be replaced of the tool magazine is accommodated is aligned with the tool replacement position, the tool head descends again and grips the upper end of the new broach cutter to a predetermined height. After rising, the slider moves from the tool change position to the machining position,
The automatic tool change is completed.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a broaching machine with an automatic tool changing device according to the present invention will be described below with reference to FIG.

In the broaching machine with an automatic tool changer, a column 12 is vertically provided on a bed 11 installed horizontally on the floor, and a tool shift slide 13 is horizontally provided on the upper front surface of the column 12. It is provided in. A slider 14 is provided on the tool shift slide 13 so as to be horizontally reciprocally driven by a horizontal shift motor 15 which is numerically controlled. Also slider 1
4, a tool head 17 for holding the upper end of the broach cutter 16, a numerically controlled vertical shift motor 18 for raising and lowering the tool head 17, and the tool head 1
A slide 19 for tool lift for guiding the lifting and lowering of 7 is provided integrally.

On the line passing through the machining position A of the tool shift slide 13, two ram sliders are provided at the upper part of the column 12 between the rear side of the tool shift slide 13 and the upper surface of the bed 11. 20 are provided in parallel and perpendicular to each other at a predetermined interval.
At 0, a ram 21 provided with a vertical through hole (not shown) for inserting the broach cutter and a work placing portion formed on the upper part of the through hole is provided at the upper end of the column 12. A work W, which is provided so as to be vertically driven by a controlled ram drive motor 22 and has a spline shape formed on the inner circumference thereof, is mounted on a work mounting portion of the ram 21 via a jig 23. There is. Further, on the line passing through the processing position A, the tool head 1 of the slider 14 is provided on the lower bed 11.
Brooch cutter 16 with the upper end gripped by 7 and suspended
A cutter chuck 24 for fixing the lower end of the is provided.

On the other hand, at the tool exchange position B of the tool shift slide 13, a cylindrical basket-shaped tool magazine 25 is provided on the lower bed 11, and various kinds of exchangeable broach cutters 26, 27, etc. are provided on the peripheral portion thereof. , The lower end side of each is inserted and accommodated vertically. Further, the tool magazine 25 is moved by an indexing device 29 driven by a numerically controlled indexing motor 28.
Among the broach cutters stored in (1), the broach cutter to be replaced (broach cutter 26 in FIG. 1) or the storage portion is automatically indexed on the line passing through the tool replacement position B. In FIG. 1, reference numeral 30
Is a cover that encloses a part of the working part so that it can be opened and closed.
Reference numeral 1 is a control panel provided on the back side of the processing apparatus.

Next, the operation of this embodiment configured as described above will be explained. For example, when a spline is formed on the inner circumference of a ring-shaped work W, an operation start switch (not shown) is turned on. A work W supplied from a work automatic supply device (not shown) is mounted on a ram 21 at a predetermined position via a jig 23 and mounted on a tool head 17 of a slider 14 positioned at a processing position A. The broach cutter 16 moved down from the state shown in FIG. 1 when the vertical shift motor 18 is started, the lower end side of the broach cutter 16 is inserted into the work W and the jig 23, and the lower end portion is further cut by the cutter chuck 24. It is inserted and fixed in. Then, the tool head 17 releases the gripped state of the brooch and moves up.

Next, after the tool head 17 is lifted by the forward / reverse activation of the vertical shift motor 18, the ram drive motor 22 supported on the upper portion of the column 12 is activated and the ram 21 is preset. A rough blade formed on the outer periphery of the broach cutter 16 inside the work W, which gradually rises at the processing speed,
A predetermined spline shape is formed on the inner peripheral surface of the work W by the middle finishing blade and the finishing blade passing in order. At the ram rising limit, the work is delivered to the front side of the jig by a delivery device (not shown).

When the broaching process is completed, the ram 21 is gradually lowered by being driven by the ram drive motor 22. At this time, the cutting chips attached to the broach cutter 16 are removed by a brush device (not shown) or the like. Then, when the ram 21 is lowered to the lower limit, the fixing of the lower end of the broach cutter 16 by the cutter chuck 24 is released, then the vertical shift motor 18 is restarted, and the tool head 17 with the broach cutter 16 attached is Figure 1
After the workpiece W that has been processed is removed from the ram 21 in this state, a new workpiece W is replaced.
Is supplied and placed at a predetermined position, and the above steps are repeated as one cycle.

Further, the broach cutter 16 is used as another broach cutter 2 having a different working shape due to the change of the work W or the like.
In the case of exchanging with 6, the control panel 31 performs a tool exchanging operation and designation of the exchanging tool, the horizontal shift motor 15 is activated, and the slider 14 in the standby state (state of FIG. 1) slides for the tool shift. Guided by 13, 13, it moves horizontally toward the tool change position B.

On the other hand, in the tool magazine 25 provided at the tool exchange position B, the slider 14 is located at the tool exchange position B.
Until the movement is completed, the indexing device 29 is rotationally driven by the indexing motor 28 which is numerically controlled, and the storage section (empty state) defined for the broach cutter 16 on the tool magazine 25 is opened. , And is indexed on a line passing through the tool change position B.

When the slider 14 is horizontally moved to the tool change position B, the vertical shift motor 1 is moved.
8 is activated, the tool head 17 is lowered, the lower end of the broach cutter 16 is fitted into a predetermined storage portion of the tool magazine 25, and the holding by the tool head 17 is released, so that the broach cutter 16 is returned to its original position. It is returned to the storage part. When the broach cutter 16 is removed, the vertical shift motor 18 is activated to raise the tool head 17 again, and the indexing device 29 is rotationally driven to move the designated broach cutter 26 on the tool magazine 25. It is indexed on the line passing through the tool change position B. Then, when the indexing is completed, the vertical shift motor 18 is activated and the tool head 17 descends again to grip the upper end of the broach cutter 26, and then the broach cutter 26 is suspended and lifted to the upper limit. When the upper limit is reached, the horizontal shift motor 15 is activated, the slider 14 is driven in the horizontal direction, and the slider 14 is horizontally moved from the tool replacement position B to the machining position A to complete the tool replacement, and then a new workpiece W is added. Is supplied and is placed on standby at a predetermined position.

As described above, in the broaching machine of this embodiment, the numerically controllable dedicated motor is used as the feed operation means for the horizontal movement and vertical movement of the slider 14 and the raising and lowering operation of the ram 21. Therefore, accurate positioning can be performed at high speed, the cycle time of processing work can be shortened, and optimum processing conditions such as processing speed can be set depending on the outer peripheral shape (processing shape) of the broach cutter to be used. For example, it is possible to change the machining speed between rough feed and finish feed as well as switching between fast feed and return, and especially when the broach cutter is being inserted into the workpiece (during machining), the machining speed can be changed as necessary. it can. In addition, a large number of confirmation sensors such as limit switches and proximity sensors, which are indispensable in the case of a device using a conventional hydraulic feed or a mechanical feed, are unnecessary, and the reliability and maintainability of the device can be improved. ..

[0020]

As described above, the broaching machine with an automatic tool changing device of the present invention accommodates a ram that fixes a workpiece and can be moved up and down at the processing position, and a plurality of replacement broaching cutters. And a slider integrally provided with a tool magazine provided in the vicinity of the processing position, a tool head for holding the upper end of the broach cutter, and a vertical drive means for moving the tool head up and down, and a slider for processing the position and the tool. Since it has horizontal driving means for reciprocating between the tool exchange position above the magazine,
Many types of broach cutters can be automatically exchanged by a simple exchange operation.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a broaching machine with an automatic tool changer according to the present invention.

FIG. 2 is a front view showing an example of a conventional broaching machine equipped with a tool changing mechanism.

[Explanation of symbols]

 14 slider 15 horizontal shift motor 16 broach cutter 17 tool head 18 vertical shift motor 21 ram 22 ram drive motor 25 tool magazine 28 indexing motor 29 indexing device A machining position B tool change position W work

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takeo Ueno 3 Izumi Industry Co., Ltd., 1 Shimizu, Kitazaki-cho, Obu-shi, Aichi

Claims (1)

[Claims] 1. A broaching machine for cutting a work into a predetermined shape by raising or lowering at least one of a work and a broach cutter relative to the other, wherein the work is fixed and the working position is set. A ram that can be driven up and down, a tool magazine that stores a plurality of replacement broach cutters and is provided near the processing position, a tool head that holds the upper end of the broach cutter, and a tool head that moves up and down. An automatic tool changer comprising: a slider integrally provided with vertical drive means for causing the slider to reciprocate; and a horizontal drive means for reciprocating the slider between a machining position and a tool exchange position above a tool magazine. Broaching machine with.