JPS5917556Y2 - Material confirmation tool - Google Patents

Description

[Detailed description of the invention] The present invention enables compressed air to be supplied into a spindle, and includes a pressure switch in the spindle that operates according to pressure changes in the compressed air, and the material is determined to be appropriate based on a signal from the switch. This invention relates to a material confirmation tool used in numerically controlled machine tools that has the function of determining whether

Conventionally, in machine factories that use numerically controlled machining functions to produce a wide variety of products in small quantities, it has been common practice to assign a worker to each machine tool to prepare the materials to be processed and perform related work. At Kanayama, which is aiming for an unmanned factory, each material to be processed is tied onto a pallet in advance, and a shuttle car carrying the pallet is placed between each numerically controlled machine tool, and each pallet is automatically transferred to the machine tool. Due to the demand for supply, there is a technical demand for unmanned operation of the entire process.

In this case, a step of confirming whether the material on the pallet automatically supplied to the machine tool is suitable is an essential element.

This invention uses compressed air for tool cleaning introduced into the spindle of a machine tool to check the material, and is equipped with a pressure switch that detects the pressure inside the chamber that is sealed by the tool that fits into the tool mounting hole. A numerically controlled machine tool is provided with a conduction hole which is removably attached to the tool mounting hole and which guides the compressed air, and when the material to be processed is moved by a predetermined amount to a predetermined measurement point of the material to be processed, the material to be processed is To provide a material confirmation tool configured to close an open air outlet if it is correct.

The present invention will be explained below based on examples.

Figure 1 is a side view showing a partial cross section of the material confirmation tool of the present invention, in which 1 is the spindle head, 2 is the tool attachment hole provided in the spindle head 1, and 3 is the material confirmation tool fitted in the tool attachment hole. 4 is a chamber sealed by the tool 3 that fits into the tool mounting hole; 5 is a pressure switch that detects the pressure in the chamber 4; 6 is a control device that receives a signal from the pressure switch; 7 is a material confirmation tool 3 , 8 is a guide bar fixed to the shank part, 9 is a filler holder slidably engaged with the guide bar 8, 10 is a filler fixed to the shaft end of the filler holder 9, 11 is the inner end of the filler holder 12 is a pin hole passing through the guide bar 8 in the radial direction; 13 is an elongated hole drilled in the outer cylinder of the filler holder 9; 14 is a pin hole 12 which is loosely engaged with the elongated hole 13; 15 is a first air discharge hole passing through the guide bar 8 in the radial direction; 15a is a ring-shaped groove cut out in the cylindrical surface of the guide bar 8 including the air discharge hole 15;
15 b is a second air discharge hole that penetrates the guide bar 8 in the radial direction; 15 C is a ring-shaped groove cut out in the cylindrical surface of the guide bar 8 including the air discharge hole 15 b; The air discharge hole 17 passes through the axis of the shank portion 7 and the guide bar 8 and connects to the air discharge hole 15.
A conductive hole 18 is an OIJ ring provided on the outer periphery of the guide bar 8.

Next, the operation of the material confirmation tool 3 of the present invention will be described.

The spindle equipped with the material confirmation tool 3 of the present invention moves the material A fastened to the pallet supplied to the table of the numerically controlled machine tool to the required measurement position based on the tape command input to the control device 6. Performs axial movement.

At the same time, compressed air supplied from the air supply source into the tool 3 is discharged into the atmosphere through a path made up of a conduction hole 17, a first air discharge hole 15, a groove 15a, and an air discharge hole 16. .

When determining whether material A is appropriate, if air is blowing out from air discharge hole 16, if tweeter 10 has not reached material A, air discharge hole 1
6, the groove 15a matches with the filler 10 as shown in the figure, and if the material A and the filler 10 hit each other too far, the groove 15C matches with the air discharge hole 16, and the air is compressed from the air discharge hole 16. Air gushes out.

The pressure in this dark room 4 decreases, and the pressure switch 5 detects that the pressure is low, and sends an abnormal signal to the control device 6, which indicates that the material A has a defective shape or the setup is incorrect, and the next step is to be carried out. Interrupt the cutting process.

Furthermore, if the material A is appropriate, the tweeter 10 will move and stop while further compressing the spring 11 after contacting the material A, and the air discharge hole 16 will exist between the groove 15a and the groove 15C. The release of compressed air to the atmosphere stops and chamber 4
The pressure increases and the pressure switch 5 operates to send a signal to the control device 6, which determines that the material A is appropriate.

The filler holder 9 can be moved within the elongated hole 13 by the pitch between the groove 15 and the groove 15C by a pin 14 fitted into the guide bar 8, and the O-ring is moved between the groove 15a and the groove 15C.
It acts to seal the compressed air supplied to C.

Next, a safety device in case the filler holder 9 exceeds a certain stroke limit will be described.

Reference numeral 19 indicates a safety dog fixed to the holder side end of the feeler holder, and 20 indicates an abnormality detected by the pressing force of the safety dock 19 when the tweeter 10 provided at the end of the spindle corresponding to the safety dock 19 overstrokes. The detector detects the bore hole 21 where compressed air was introduced and the bore hole 2.
1; a spring 23 that abuts one end of the piston 22 and the bottom of the bored hole 21;
Air discharge hole 24 provided on the large cylindrical surface of the boring hole 2
It is comprised of a pressure switch 25 that detects the pressure within the air supply pipe leading to the air supply pipe 1.

Therefore, when the filler holder 9 exceeds a certain stroke, the safety dock 19 moves while pressing the piston 22 and the spring 23, and closes the air discharge hole 24, causing the pressure of the pressure switch 25 to act and cause the control device 6 to malfunction. The feed spindle 1 can be stopped as a signal to prevent damage to the material checking tool 3.

As mentioned above, the present invention enables attachment of a tool for checking materials without making extensive modifications to a conventional machine, and allows for the use of a combination machine that uses compressed air to clean tool mounting holes.
This material confirmation tool can be used to confirm whether the material is appropriate or not, greatly contributing to labor savings in unmanned factories.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a partial cross section of the material confirmation tool of the present invention. 3: Material confirmation tool, 7: Shank part, 8 guide bar,
9: filler holder, 10: filler, 11 spring, 12: pin hole, 13: oblong hole, 14: pin, 15:
First air discharge hole, 15a: ring-shaped groove, 15b: second air discharge hole, 15b: J-shaped groove, 16: air discharge hole, 17: conduction hole.

Claims (1)

[Scope of utility model registration request] A tool consisting of a shank part that fits into a tool mounting hole of a spindle and a guide bar formed integrally with or fixed to the shank part, a filler holder that fits loosely with the guide bar of the tool, and an inner end of the filler holder. a spring that comes into contact with an end of the guide bar; a stopper mechanism that restricts the amount of movement of the filler holder; an air discharge hole that penetrates in the radial direction of the filler holder; and the guide that is in a matching relationship with the air discharge hole. a first air discharge hole and a second air discharge hole bored in the radial direction of the bar; an O-ring disposed on the guide bar so as to surround the first air discharge hole and the second air discharge hole; and a conduction hole drilled in the tool that communicates with the air discharge hole.