JPS601954Y2 - Positioning device in machine tools - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a positioning device for a tool head and a jig stand in a machine tool.

Conventionally, this type of device includes a guide bar on one side and a guide post on the other side that fit and position a tool head and a jig stand that holds a workpiece in front of the tool head.
The guide bar is equipped with a thin air passage for high-pressure air and an air nozzle at the tip connected to the air passage, and the air guided through the nozzle blows away foreign matter such as chips inside the guide post. However, in this case, the guide post is generally made in the form of a blind hole, and in such a case, after the guide bar is fitted into it, the inside of the post is closed and the foreign matter is removed. is accompanied by the inconvenience of not being discharged.

In order to eliminate the above-mentioned inconveniences, a type in which the guide post is provided with a horizontal discharge hole has been proposed, but in this case, the foreign matter tends to fly up due to the turbulent flow of air within the post. As a result, it is difficult to obtain good discharge.

The purpose of the present invention is to obtain a device that does not have the above disadvantages, and the tool head 1 and the jig table 2 that holds the workpiece a in front of the tool head 1 and the jig table 2 that hold the workpiece a in front of the tool head 1 and the jig table 2 that are fitted into each other for positioning. A guide bar 3 and the other guide post 4 are provided, and an air passage 5 for guiding high-pressure air to the guide bar 3 and an air nozzle 6 at the tip of the air passage 5 are provided to block the air passage 5 and the air nozzle 6 is provided at the tip of the air passage 5 for guiding high-pressure air to the guide bar 3. In the type that blows away powder and other foreign matter, the air nozzle 6 is connected to the air passage 5.
The annular groove 7 on the outer periphery of the tip of the guide bar 3 is formed in a constricted annular nozzle in front of the guide bar 3, and is provided with a discharge port 8 at a forward position inside the guide post 4 to communicate with the outside. .

The drawing shows the case of a machine tool with an exchangeable gigang head, that is, the tool head 1 is configured in a gigang head type, and a processing unit 11 is provided on a machine stand 9 via a feed table 10 so as to be freely advanced. A plurality of them are prepared around the outer periphery of the machine, and any one can be selected to be placed in the operating position on the front surface of the machine. It acts to process the workpiece a on the jig table 2 at the front position on the table 9.

The guide bar 3 projects forward from the tool head 1, and the guide post 4 consists of a through hole formed in the jig table 2 in the front and back direction, into which a guide bush 4a is fitted. A large diameter space 12 is left in the through hole by adding a step in front of the bushing 4a, and the above-mentioned outlet 8 extending diagonally downward is provided in this space 12.

The air passage 5 branches radially at the tip and is blocked by the annular groove 7, and has a constricted annular nozzle 6 on the front surface thereof, so that air flows from the nozzle 6 to the guide coupler 4a. It was made to eject forward along the inner circumferential surface to act on foreign matter such as chips adhering to the inner circumferential surface.

To explain its operation, guide bar 3 and guide post 4
Considering the case where the bars 3 and 3 are fitted together, air is introduced from the annular groove 7 on the outer periphery of the tip of the bar 3 to the front surface thereof through the annular nozzle 6, and thus the air flows inside the post 4. It flows along the entire circumference of the circumferential surface and acts on chips and other foreign matter adhering to the inner circumferential surface, which is then discharged from the space 12 in front of it to the outside via the lateral outlet 8. It is discharged.

In this way, according to the present invention, a discharge port 8 is provided at the front position within the guide post 4 to communicate it to the outside.
The inconvenience of the conventional post 4 having a blind hole shape can be eliminated, and the air nozzle 6 at the tip of the guide bar 3 is formed as an annular nozzle in front of the annular groove 7 on the outer periphery of the tip. The air flows along the entire inner peripheral surface of the guide post 4 in front of it, forming an annular laminar flow, and the air becomes a turbulent flow within the post 4 and scatters chips and the like. It has the advantage of eliminating the above-mentioned disadvantages of the conventional one.

[Brief explanation of drawings]

Fig. 1 is a side view of an example of the device of the present invention, Fig. 2 is a side view with a dilated view showing a part of its main parts in the operating state, Fig. 3 is an enlarged sectional view of a part thereof, Figs. Figure 5 is a cross-sectional view taken along the IV-IV line and the ■-■ line. a... Workpiece, 1... Tool head,
2... Jig stand, 3... Guide bar, 4
...Guide post, 5...Air passage,
6... Air nozzle, 7... Annular groove, 8...
·····Vent.

Claims (1)

[Scope of utility model registration request] One guide bar 3 that fits and positions the tool head 1 and the jig stand 2 that holds the workpiece a in front of the tool head 1
and the other guide post 4, and an air passage 5 for introducing high-pressure air to the guide bar 3, and an air nozzle 6 at the tip thereof connected to the air passage 5, so that the guide post 4 is
A narrow annular nozzle on the front surface of an annular groove 7 on the outer periphery of the tip of the guide bar 3 that connects the air nozzle 6 to the air passage 5. A positioning device for a machine tool, which comprises a discharge port 8 formed at the front of the guide post 4 and communicating with the outside.