JPH07204982A - Nozzle direction control device - Google Patents

Abstract

PURPOSE:To provide a device for controlling a coolant nozzle, which can automatically adjust the direction of the nozzle in accordance with a difference in length among cutter tools. CONSTITUTION:In a nozzle direction control device for adjusting the direction of a nozzle at each tool exchange so as to jet coolant toward the distal end of a tool attached to a spindle 3, the nozzle and a touch sensor 12 for detecting a length of the tool are arranged in an outer peripheral fixing part of the spindle 3, being opposed to each other, and are coupled together by a power transmission mechanism 13 so that they oscillate, symetric each other. The nozzle 11 and the sensor 12 are retracted away from the tool in response to a work completion signal, and further, they are turned toward the tool in response to a tool exchange completion signal, and are stopped at a position where the sensor 12 makes contact with the distal end of the tool.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control technology of a coolant nozzle for accurately injecting a coolant to the tip of a cutting tool of a machine tool, which is capable of automatically adjusting the nozzle direction according to the change of each cutting tool length. Is.

[0002]

2. Description of the Related Art Conventionally, a direction control technology of a coolant nozzle for accurately injecting a coolant at a tip of a cutting tool of a machine tool has a nozzle length which is determined by a tool length obtained from a tool number according to a replacement instruction of a tool changer. It is done from being decided. That is, the nozzle direction is determined corresponding to the tool number in the NC machining program.

[0003]

In the method of determining the nozzle direction corresponding to the tool number in the NC machining program, the tool number in the NC machining program is extracted and the nozzle direction is determined based on the extracted tool number. Therefore, the control system becomes complicated, and the confirmation work of the nozzle direction determination requires labor and time. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to provide a control device for a coolant nozzle capable of automatically adjusting the nozzle direction in response to a change in each cutting tool length.

[0004]

SUMMARY OF THE INVENTION According to the present invention, a coolant liquid is jetted toward the tip of a tool length mounted on a spindle.
In the one in which the nozzle direction is adjusted every time the tool is changed, the nozzle and the touch sensor for the tool length are arranged face-to-face on the outer peripheral fixed part of the spindle, and both drive sources are installed at an arbitrary position far away from the spindle. By means of a power transmission member to symmetrically swing and rotate, and the machining end signal avoids the nozzle and the touch sensor of the tool length from the tool direction. The nozzle direction control device is characterized in that the touch sensor and the touch sensor are turned closer to each other in the tool direction, and the turn of the nozzle is stopped at the turning position where the touch sensor touches the tip of the tool.

[0005]

According to the present invention, the drive source of the power transmission member is actuated by the tool change completion signal, and the nozzle and the touch sensor for detecting the tool length are caused to swivel toward each other in synchronization with the tool direction. With this, the nozzle and the touch sensor gradually move toward the tool tip side in a symmetrical posture, and stop the drive source of the power transmission member at the turning position where the touch sensor touches the tool tip. Then, the nozzle direction is aligned with the tip of the tool, and the nozzle is automatically oriented in that direction while measuring the tool length as the tool is changed. Since the drive source of the power transmission member is arranged at an appropriate position far away from the main shaft portion, it does not narrow the space of the main shaft portion and does not hinder the workability of the work.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments shown in the drawings will be described below. Figure 1
3 to 3 describe the coolant nozzle direction control device of the present invention.

First, referring to FIG. 1, a spindle head 1 of a machine tool
Is equipped with a spindle 3 at the tip following the small diameter portion 2 at the lower end, and various tools 4 are exchangeably mounted on the spindle by a tool exchanging device 10. The spindle head 1 replaced with a new tool 4 approaches the work 7 on the table 6, and when machining is started by this tool 4, the nozzle 11 provided in the lower end small diameter portion 2 causes the coolant liquid to flow into the tip of the tool 4. Jet toward. The orientation of the nozzle 11 is controlled toward the tip of a new tool 4 every time the tool 4 is replaced.

In the nozzle direction control means of the present invention, the nozzle 11 and the tool length touch sensor 12 are arranged face-to-face with each other on the outer peripheral fixed portion which is the lower end small diameter portion 2 of the main shaft 3. The both 11, 12 are connected by a power transmission member 13 by the same drive source 14 (M) so as to symmetrically swing and turn.

That is, the detailed structure is as shown in FIG. First, the same drive source 14 (M) employs a motor with a speed reducer and is arranged at an arbitrary position such as the top of the spindle head 1. The power transmission member 13 is arranged at an outer peripheral fixed portion which is the lower end small diameter portion 2 of the main shaft, has a ring gear 13A having helical teeth on the outer periphery as a main component, and is provided at the tip of the motor M with reduction gear and the flexible wire FW. It meshes with the gear 15. With this, ring gear 1
3A turns in both directions by the forward and reverse rotation of the motor. The nozzle 11 and the touch sensor 12 for the tool length are arranged in a face-to-face manner with the main shaft 3 interposed therebetween, and the spindle 11 is integral with the helical gears 11A and 12A meshing with the ring gear 13A.
It is held at the tips of B and 12B. Then, the nozzle 11 and the tool length touch sensor 1 are rotated by the forward and reverse rotation of the motor.
2 means to open and close symmetrically with a tool in between as shown by the arrow. Further, the main body 12C of the touch sensor 12 is
Rotation axis 1 of rotary actuator RA interposed in B
6 is attached.

The rotary actuator RA is A
The controller C2 operates by the measuring signal (M85) transmitted from the NC device 20 after the end of TC, and the touch sensor 12
From the direction of the two-dot chain line avoiding the above direction, the nozzle swirls downward in the same direction as the nozzle 11. This measurement signal (M8
By 5), the controller C1 also works to rotate the motor M in the forward direction, and the both 11 and 12 are turned toward the tip of the tool 4. Further, the rotary actuator RA causes the controller C2 that receives the tool tip detection signal transmitted from the touch sensor 12 to operate to avoid it again in the two-dot chain line direction. This tool tip detection signal also works on the controller C1 to direct the nozzle toward the tool tip to stop the motor M, and also as a measurement completion signal N
Send to FIN of C device 20. With this, processing of the work is started. Further, the controller C1 operates the controller C1 in response to a machining end signal from the NC device 20 to reverse the motor M, thereby avoiding the touch sensor from the tool direction. With this, the tool can be exchanged, and the controller C1, C2 is then activated by the tool exchange end signal (measurement signal (M85)).
Is operated to rotate the motor M in the forward direction, and the both 11 and 12 are swung again toward the tip of the tool 4.

The structure of the nozzle direction control device of the present invention is as described above, and operates as follows. The operation will be described with a focus on the operation explanatory view of FIG. "Processing" means
The coolant is jetted with the nozzle 11 directed toward the tip of the tool 4. When a "machining end signal" is issued from the NC device 20 to the controller C1, the motor M is rotated in the reverse direction and the nozzle 11 is stopped at the position avoiding the main shaft 3 in the same direction. In this state, the spindle head 1 moves to the tool exchange position and "A
"TC operation" is performed.

"End of ATC" means "M85 of M code;
From the NC device 20 to the controllers C1, C as "measurement signals"
Raised to 2. With this, the controller C2 rapidly turns downward in the same direction as the nozzle 11 from the two-dot chain line direction in which the orientation of the touch sensor 12 is avoided by operating the rotary actuator RA. Then, the controller C1 also works by the measurement signal (M85) to rotate the motor M in the normal direction,
Is swung toward the tip of the tool 4. When the touch sensor 12 touches the tip of the tool 4 by the turning operation of both 11, 12,
The sensor body 12C emits an "ON signal".

The controller C1 which receives the "ON signal" of the sensor body 12C suddenly stops the motor M and directs the nozzle toward the tip of the tool. Also, the "ON signal" of the sensor body 12C
The controller C2 that receives the rotary actuator RA
To avoid the direction of the touch sensor 12 in the direction of the chain double-dashed line. Further, the NC device 20 which receives the “ON signal” of the sensor body 12C receives “FIN” as the “measurement end signal”.
To enter. With this, the NC device 20 moves the spindle head 1 "to machining" for the workpiece to start the workpiece machining. At the above “processing end”, as described above again, the NC device 20
Sends a "processing end signal" to the controller C1 to avoid the nozzle 11 in the same direction as the main shaft. The same operation is repeated thereafter.

It is needless to say that the present invention is not limited to the above-mentioned respective embodiments, and that design changes can be further made within the scope of the invention.

[0015]

According to the present invention, in order to inject the coolant toward the tip of the tool length mounted on the spindle, the nozzle direction is adjusted every time the tool is changed. The touch sensor and the touch sensor are arranged in a face-to-face relationship, and both are connected by a power transmission member by a single drive source installed at an arbitrary position far away from the main shaft so that they swing symmetrically. The nozzle and the touch sensor for the tool length are avoided from the tool direction, and the nozzle and the touch sensor for the tool length are swung closer to the tool direction by the tool exchange end signal, so that the nozzle direction corresponds to the change in each cutting tool length. There is an effect that it is possible to provide a coolant nozzle control technology that enables automatic adjustment. Further, since the drive source of the power transmission member is arranged at an appropriate position far away from the main shaft portion, there is an effect that the space of the main shaft portion is not narrowed and the workability of the work is not impaired.

That is, since it is not necessary to extract the tool number from the NC machining program and control the nozzle direction based on the extracted tool number as in the conventional case, the control system can be simplified to determine the nozzle direction. There is an effect that confirmation work is not required.

[Brief description of drawings]

FIG. 1 is a front view of a main shaft portion showing a nozzle control device of the present invention.

FIG. 2 is a perspective view of the entire system showing a nozzle control device of the present invention.

FIG. 3 is an operation diagram showing a control device for a nozzle of the present invention.

FIG. 4 is a plan view of a main shaft portion showing a nozzle control device of the present invention.

[Explanation of symbols]

 1 spindle head 2 lower end small diameter part 3 spindle 4 tool 7 work 10 tool changer 11 nozzle 12 touch sensor 12C touch sensor body 13 power transmission member M motor 13A ring gear 11A, 12A helical gear C1, C2 controller 20 NC device

Claims (1)

[Claims] 1. A nozzle for adjusting a nozzle direction every time a tool is replaced so as to inject a coolant liquid toward a tip of a tool length mounted on a spindle, wherein a nozzle and a touch sensor for a tool length are attached to an outer peripheral fixed portion of the spindle. They are arranged in a face-to-face relationship, and both are connected by a power transmission member by one drive source installed at an arbitrary position far away from the main shaft so as to symmetrically swing and swivel. In addition to avoiding the tool length touch sensor from the tool direction, the nozzle and the tool length touch sensor are swung toward the tool direction by the tool change end signal, and the nozzle swivel is stopped at the swivel position where the touch sensor touches the tool tip. A nozzle direction control device characterized by: