JPS639952B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a notching tool, and in particular, it is configured to be removably attached to a spindle head of a machine tool so that it can be used in a complex production system, and the tool is replaceable. This invention relates to a notch pushing tool that can be used interchangeably with conventional cutting tools in machine tools.

[Technical background and problems of the invention]

Generally, tool-changeable machine tools are used by attaching and detaching various cutting tools to a spindle head, so that a single machine tool can perform various cutting operations.

On the other hand, in recent years, complex production systems have been developed in which multiple machine tools are arranged and used to continuously hold, cut, and assemble workpieces. In this complex production system, one machine tool is required to perform many types of work such as cutting, assembly, disassembly, and cleaning. Machine tools that cannot be used are functionally insufficient, and it has become necessary to be able to mount assembly tools, disassembly tools, cleaning tools, etc. on the spindle head.

[Purpose of the invention]

Among the various tools that are required to be attached to and removed from the spindle head of a machine tool used in the above-mentioned complex production system, the present invention provides a knock-out tool that is particularly capable of safely and reliably extracting a dowel pin for workpiece assembly. The purpose is to provide.

[Summary of the invention]

In order to achieve the above object, a knocking tool according to the present invention includes a tool holder that can be attached to and removed from a spindle head of a machine tool, and a pin fitting part is provided at one end and the other end is held by the tool holder. It is characterized by consisting of a rod-shaped knock hanging rod and a work holding device that presses and holds a work into which a knock pin for work assembly is inserted, and can be attached to and detached from the spindle head of a machine tool.
When installed, it engages with a dowel pin used in assembling a workpiece, and the dowel pin can be pulled out.

[Embodiments of the invention]

Embodiments of the present invention will be described in detail below with reference to the drawings.

As shown in FIGS. 1 and 2, the knocking tool according to the present invention includes a tool holder 1 that is attached to a spindle head of a machine tool, and a knocking rod 2 that is engaged with a knocking pin inserted into a workpiece. and,
It consists of a workpiece holding device 3 that presses the workpiece and holds it against the machine tool when the dowel pin is pulled out.

The tool holder 1 is substantially the same as a conventional tool holder, and the taper shank portion 4 is inserted and fitted into a tapered hole formed at the tip of a spindle of a machine tool. And this taper shank portion 4
A pull stud 5 provided at the rear end is adapted to be held by the machine tool. In this embodiment, the shank portion is formed in a tapered shape as described above, but it is of course possible to adopt a straight shank portion. If a straight shank part is used, the spindle tip of the machine tool should also be formed into a straight hole.

Further, an air passage 6, which constitutes a part of the work holding device 3, is formed in the tool holder 1 so as to penetrate from the rear end to the front end. This air passage 6 includes a rear passage 7 extending on the axis;
A tool holder 1 extends diagonally from this rear passage 7.
It consists of a front side passage 8 that opens at the front end surface of. This air passage 6 guides high-pressure air supplied from the machine tool side to the front of the tool holder 1.

Further, the locking rod 2 is made of a rod-shaped member arranged on the axis of the tool holder 1.
One end thereof is integrally connected to the front end surface of the tool holder 1 so as to protrude forward from the tool holder 1 . Furthermore, a pin fitting part 9 is provided at the tip of the knock pin 2, and this pin fitting part 9 has a hook-shaped tip protruding step part 11 that engages with the head of the knock pin. ing.

In addition to the air passage 6, the work holding device 3 includes a cylinder 12 connected to the tool holder 1, and a piston 13 that reciprocates within the cylinder 12.
A workpiece pressing body 14 extending forward from the piston 13 is provided.

The cylinder 12 is made of a cylinder having approximately the same diameter as the front end of the tool holder 1, and is arranged so that its axis coincides with the axis of the knocking rod 2. The rear end opening is connected to an annular step 15 provided on the outer circumference of the front end of the tool holder 1, and a plurality of bolts 1 are connected to the annular step 15.
6, and this cylinder 12 is also coaxially connected to the tool holder 1.

Furthermore, the piston 13 disposed within the cylinder 12 has a through hole in its center portion that fits the knocking rod 2, and the knocking rod 2 is slidably fitted into this through hole. There is. As a result, the center portion of the piston 13 is connected to the above-mentioned knock rod 2.
The outer circumferential portion of the cylinder 12 is slid along the inner wall of the cylinder 12. In addition,
Seal members 17 and 18 are attached to the outer periphery of the piston 13 and the inner periphery of the through hole to ensure airtightness during reciprocating movement of the piston 13. Further, a guide plate 19 is attached to the rear end surface side of the piston 13, and this guide plate 19 allows the locking rod 2 of the piston 13 to be locked.
A gap is provided between the outer periphery of the knocking rod 2 and the inner periphery (through hole) of the workpiece pressing body 14 to prevent the engagement of the pin fitting part 9 with the knock pin during knocking out. This prevents the pulling load from being eccentric with respect to the tool axis, and allows the piston 13 to move appropriately within the cylinder 12 even if the knocking rod 2 is bent. It's summery.

The air passage 6 is opened to a space on the rear side of the piston 13, and when air is supplied from the air passage 6, the piston 13 is moved forward. Furthermore, an annular convex step 21 is formed on the inner wall at the substantially center of the cylinder 12 to stop the movement of the piston 13, so that the piston 13 cannot move forward any further. Note that the movement of the piston 13 to the rear side is as follows:
It is regulated by the front end surface of the tool holder 1.
Further, an air vent hole 22 is provided on the front side of the annular convex step portion 21, passing through the cylinder 2 in the radial direction, and the piston 13 can freely reciprocate through the air vent hole 22.

Furthermore, an elongated cylindrical workpiece pressing body 14 is slidably fitted onto the locking rod 2. The rear end portion of this workpiece pressing body 14 is integrally connected to the front end surface of the piston 13, and both
4 and 13 are designed to be integrally reciprocated. This workpiece pressing body 14 has a predetermined length, and as it reciprocates backward and forward, its tip end is bent behind the pin fitting part 9 of the knocking rod 2 (see FIG. 1). ) and the front (see Figure 2), respectively. Thereby, the tip of the workpiece pressing body 14 can come into contact with the workpiece and be separated from it again. Further, the tip of the workpiece pressing body 14 is covered with a protective cover 23, which acts as a scratch-proof material for the cushion and the workpiece when the workpiece pressing body 14 comes into contact with the workpiece.

Furthermore, at the front end opening of the cylinder 12,
A lid 24 is attached with a plurality of bolts 25, and the front end opening of the cylinder 12 is closed by the lid 24. Further, the lid 24 has a through hole formed in its center portion that fits the workpiece pressing body 14, and the workpiece pressing body 14 passes through the through hole so as to be movable in the axial direction. Furthermore, this lid 24
A guide plate 26 is attached to the front end surface of the
By aligning the axis of the through hole provided in this guide plate 26 with the tool axis, and by slidably fitting the through hole and the workpiece pressing body 14, the workpiece pressing body 14 can be properly and slidably moved. It is designed to be able to move freely.

A coil spring 27 is attached between the lid 24 and the piston 13, and the coil spring 27 always urges the piston 13 rearward. This coil spring 27
are provided so as to surround the outer periphery of the workpiece pressing body 14.

As shown in FIG. 3, the knocking tool having such a structure is used by being attached to the spindle head of a machine tool 30, and is used in opposition to a machine tool 32 holding a workpiece 31.

First, if air is not supplied from the machine tool 30 to the knocking tool, the workpiece pressing body 1
4 is maintained at the rear position by a coil spring 27 (FIG. 1), and the pin fitting portion 9 of the locking rod 2 is exposed to the front. In this state, the machine tool 30 is moved forward toward the workpiece 31 and lowered,
The pin fitting portion 9 is hooked onto the head of the dowel pin 33 that is fitted into the workpiece 31 (FIG. 3). next,
When high-pressure air is supplied to the nut removal tool through the spindle head of the machine tool 30, this high-pressure air flows out through the air passage 6 into the cylinder 12.
The pressure of the air on the rear side of the piston 13 is increased, and the piston 13 is moved forward against the coil spring 27 (FIG. 2). As a result, the workpiece pressing body 14
The tip of is pressed against the workpiece 31. If the machine tool 30 is moved backward in this state, the dowel pin 33 will be pulled out from the workpiece 31. In this case, as described above, the workpiece 31 is
Since the workpiece 31 is continuously pressed against the chuck of the machine tool 32 due to the pulling force of the dowel pin 33 (e.g., approximately 300 kg for a dowel pin with a diameter of 8 mm), the workpiece 31 will not come loose from the chuck of the machine tool 32 at all, and the work of pulling out the dowel pin 33 will be easy. It can be done safely and reliably. Furthermore, there is no need to increase the work holding force of the machine tool 32, and the device can be made smaller and less expensive.

In addition, in this embodiment, as shown in FIG.
Since the knock fitting part 9 is formed into a hook shape that opens downward, the knock pin 33 falls downward at the same time as it is completely pulled out from the workpiece 31, and this fallen knock pin 33 touches the workpiece pressing body 14.
It is becoming possible to receive it internally. Then, if the machine tool 30 is moved backward while continuing to supply air from the machine tool 30 side to the knocking tool so that the workpiece pressing body 14 remains pushed forward, the knock pin 33 is transported to a predetermined position. can do. Furthermore, if the supply of air is stopped at the position where the workpiece is to be dropped, the workpiece pressing body 14 is moved rearward by the coil spring 27, and the knock pin 33 can be dropped at that position.

〔Effect of the invention〕

As described above, the knocking tool according to the present invention includes a tool holder that can be attached to and removed from a spindle head of a machine tool, and a rod-shaped knob that is held at one end by the tool holder and has a pin fitting portion at its tip. Since it consists of a hanging bar and a workpiece holding device that presses the workpiece and holds it against the machine tool, it can be used by attaching and detaching it to the spindle head of a machine tool where the tool can be replaced, along with a cutting tool, etc. The dowel pin for assembly can be pulled out safely and reliably. Therefore, according to the present invention,
It is possible to greatly advance complex production systems and realize extremely efficient work.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a nut removing tool according to an embodiment of the present invention, showing a state in which air is not supplied. FIG. 2 is a diagram showing a state in which air is not supplied in the embodiment shown in FIG. FIG. 3 is a side view showing the state in which the nut removing tool according to the present invention is being used, and FIG. 4 is an enlarged sectional view of the tip portion of the nut removing tool according to the present invention. 1...Tool holder, 2...Knot hanging bar, 3...
... Knot holding device, 6 ... Air passage, 9 ... Pin fitting part, 12 ... Cylinder, 13 ... Piston,
14...Work pressing body, 27...Coil spring.

Claims (1)

[Scope of Claims] 1. A tool holder that can be attached to and removed from a spindle head of a machine tool, and a rod-shaped knob whose one end is held by the tool holder and whose other end is provided with a pin fitting part for engaging the knob pin. A knockout tool comprising a hanging bar and a workpiece holding device that presses and holds the workpiece into which the knock pin is inserted. 2. The work holding device includes a cylinder fixed to the front end of the tool holder coaxially with the knocking rod, and a piston that is slidably fitted to the knocking rod and reciprocates in the cylinder in an airtight manner. and a workpiece extending forward from the piston in a long cylindrical shape and slidably fitted onto the knocking rod so as to reciprocate integrally with the piston, and whose tip abuts against and separates from the workpiece. a pressing body, an air passage formed to penetrate from the rear end to the front end of the tool holder and guiding the actuating air for the piston into the cylinder; 2. The nut removing tool according to claim 1, further comprising a spring body that biases the nut. 3. The nut removal tool according to claim 1, wherein the pin fitting portion is formed in a hook shape that is open downward.