JP2000126980A - Working fluid injector for machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a working fluid injector for machine tools that gives improved working fluid injection from its injection nozzle. SOLUTION: A moving mechanism has a translatory pneumatic cylinder 6 for moving an injection nozzle 10 parallel to the axis of a spindle 2. Controllers 30 and 50 control the moving mechanism depending on changes of tools 4 to move the injection nozzle 10 to an injection position according to working portions. The moving mechanism furthermore has a rotary pneumatic cylinder 60 that is moved by the translatory pneumatic cylinder 6 to vary the injection angle of the injection nozzle 10, and another translatory pneumatic cylinder 80 for moving the injection nozzle 10 across the axis of the spindle 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machining fluid jetting device for a machine tool, which jets a machining fluid from a jet nozzle to a processing position of a workpiece by a tool.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Patent Application Laid-Open No. 8-252745, an injection nozzle is swung around a transmission shaft as a method for injecting a machining liquid from an injection nozzle to a processing position of a workpiece by a tool. In addition, there has been proposed an apparatus that changes the injection angle of the working fluid injected from the injection nozzle. When the tool is changed, the positional relationship between the injection nozzle and the processing location changes, but by changing the injection angle of the injection nozzle, the processing fluid is processed even if the tool length changes due to tool change. It is made to be injected into the place.

[0003]

However, in such a conventional apparatus, when the injection angle of the injection nozzle is changed, the machining liquid cannot be properly injected to the processing location depending on the shape of the workpiece or the processing location of the tool. There was a problem that there is. For example, when the injection angle of the injection nozzle is changed, there is a case where the cutting fluid cannot be appropriately flowed by the processing liquid depending on the injection angle.

An object of the present invention is to provide a machining fluid ejection device for a machine tool in which ejection of machining fluid from an ejection nozzle is improved.

[0005]

In order to achieve the above object, the present invention takes the following means to solve the problem. That is, in a machining fluid ejection device for a machine tool, which attaches a tool selected by a tool changing mechanism to a main shaft of a machine tool and injects a machining fluid from an injection nozzle to a machining position of a workpiece by the tool, And a moving mechanism having a direct-acting pneumatic cylinder for moving the spray nozzle in a direction parallel to the tool, and controlling the moving mechanism in accordance with the replacement of the tool to move the spray nozzle to a spray position corresponding to the processing location. This is a machining fluid ejection device for a machine tool, which is provided with control means for moving.

The moving mechanism may further include a rotary pneumatic cylinder which is moved by the linear pneumatic cylinder, and the injection angle of the injection nozzle can be changed by the rotary pneumatic cylinder. Alternatively, the moving mechanism may further include a direct-acting pneumatic cylinder that moves the injection nozzle in a direction intersecting the axial direction of the main shaft.

Further, the control means may be configured to control the moving mechanism in accordance with the length of the replaced tool.
Alternatively, a configuration may be provided in which a sensor is provided for detecting the amount of movement of the injection nozzle by the direct acting pneumatic cylinder, and the control means controls the moving mechanism in accordance with the amount of movement and the length of the tool that has been replaced.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. Reference numeral 1 denotes a spindle head of a machine tool. A tool 4 such as a drill is attached to a spindle 2 of the spindle head 1. The tool 4 is automatically exchanged with another selected tool by a tool exchange mechanism (not shown) according to a preset program.

A direct-acting pneumatic cylinder 6 is attached to the side surface of the spindle head 1. A rod 8 slid by driving the direct-acting pneumatic cylinder 6 slides in a direction parallel to the axial direction of the spindle 2. It is arranged to be. An injection nozzle 10 for injecting a machining fluid such as a coolant or an oil mist is provided on the tip end side of the rod 8, and a hose 12 connected to a machining fluid supply source (not shown) is connected to the ejection nozzle 10. I have. The injection direction of the injection nozzle 10 is set in advance so as to face a processing location of the workpiece 14 by the tool 4. In the present embodiment, the moving mechanism 26 is constituted by the direct-acting pneumatic cylinder 6.

As shown in FIG. 2, a linear sensor 16 for detecting the amount of movement of the rod 8 is provided on the direct acting pneumatic cylinder 6.
The linear sensor 16 has a detection rod 22, and a storage hole 2 formed in the rod 8 from the piston 18 side.
The detection rod 22 is inserted into the head 0 from the head side. The linear sensor 16 detects a magnetic change or the like due to sliding of the piston 18 via the detection rod 22 and outputs a signal corresponding to the amount of movement of the rod 8.

The linear sensor 16 is, as shown in FIG.
The detection rod 22 may be provided in the cylinder tube 24 by penetrating the piston 18 in parallel with the rod 8, and the sliding amount of the rod 8 may be detected by sliding of the piston 18. Alternatively, as shown in FIG.
May be provided on the outer periphery of the cylinder tube 24 to detect the sliding of the piston 18.

The linear sensor 16 is, as shown in FIG.
The pneumatic servo control device 30 is connected to the pneumatic servo control device 30. The pneumatic servo control device 30 includes a well-known CPU 32 and a memory 34 as a center of a logical operation circuit, and has an input circuit 36 for performing input and output with the outside, an output circuit 38, 40 are connected to each other via a common bus (not shown).

The CPU 32 inputs a signal from the linear sensor 16 via an input circuit 36. On the other hand, the CPU 32 outputs a drive signal to the servo valve 42 via the output circuit 38 based on these signals, data in the memory 34, and a control program stored in advance. The servo valve 42 controls the direct-acting pneumatic cylinder 6 by connecting an air pressure source (not shown) and the direct-acting pneumatic cylinder 6 via air tubes 44 and 46 based on a drive signal.

Further, it is connected via a communication circuit 40 to a main controller 50 such as a programmable controller or a numerical controller. The main controller 50 includes a well-known CPU 52 and a memory 54 at the center of a logical operation circuit, and includes a communication circuit 40 of the pneumatic servo controller 30 and a communication circuit 56 for communicating data such as the length of the tool 4 and machining conditions. They are interconnected via a common bus (not shown). Main controller 50 controls the machine tool according to a preset program. In the present embodiment, the pneumatic servo control device 30 and the main control device 50 constitute control means.

Next, the aforementioned pneumatic servo controller 30
Will be described with reference to the flowchart of FIG. First, it is determined whether a positioning command has been input from the main controller 50 to the pneumatic servo controller 30 via the communication circuit 40 (step 100). The positioning command is output from the main control device 50 to the pneumatic servo control device 30 when the tool 4 is changed by the tool changing mechanism.

When a positioning command is issued, the command position, speed and the like are sent from the main controller 50 to the pneumatic servo controller 3.
Input to 0 (step 110). Next, the current position of the rod 8 is input from the linear sensor 16 (step 12).
0). Then, the command position input by the above-described processing,
The moving amount and speed of the rod 8 are calculated from the speed and the current position (step 130). That is, the movement amount is calculated by subtracting the current position from the command position.

Subsequently, a drive signal is output to the servo valve 42 based on the calculated movement amount and speed, and the servo valve 4
2 is started (step 140). This allows
The piston 18 slides in the cylinder tube 24, and the injection nozzle 10 moves with the movement of the rod 8.

The sliding of the piston 18 is detected by the linear sensor 16, and pneumatic control is performed by the servo valve 42 so that the calculated speed or the like is obtained (step 15).
0), the compressed air is supplied to the direct-acting pneumatic cylinder 6, and the injection nozzle 10 is moved (step 160).

Then, the sliding of the piston 18 is detected by the linear sensor 16, and the position detection / calculation processing of the rod 8 is executed (step 170). Next, it is determined whether or not the command position has been reached (step 180). If it is determined that the command position has not been reached, the processing of step 150 and subsequent steps is repeatedly executed. If it is determined that the command position has been reached, the processing of step 100 and subsequent steps is executed. If it is determined that there is no input of the positioning command and that the command has been completed (step 190), the control process is temporarily terminated.

As a result, the injection nozzle 10 is moved to a position corresponding to the length of the tool 4, and
The processing fluid is sprayed to the processing location by. Further, since the injection nozzle 10 is advanced and retracted by the highly rigid direct-acting pneumatic cylinder 6, it can be applied even when a large machine tool or the like has a long advance and retreat distance. Further, the mechanical structure is simple.

Next, a second embodiment different from the above-described embodiment will be described with reference to FIG. Note that the same members as those in the above-described embodiment are denoted by the same reference numerals, and detailed description is omitted. The same applies hereinafter. In the second embodiment, the rod 8 of the direct acting pneumatic cylinder 6 is
0 is attached, and the injection nozzle 10 is attached to the rotating shaft 62 of the rotary pneumatic cylinder 60. The rotary pneumatic cylinder 60 is, as shown in FIG.
The vane 64 receives the supplied air pressure and swings the rotating shaft 62 by a predetermined angle. The rotary pneumatic cylinder 60 is provided with a rotary sensor 66 for detecting a swing angle of the rotary shaft 62, and a signal from the rotary sensor 66 is connected to be input to the input circuit 36 of the pneumatic servo controller 30. Have been.

A servo valve 68 is also connected to the rotary pneumatic cylinder 60 via air tubes 70 and 72. By rotating the rotary shaft 62 of the rotary pneumatic cylinder 60, the injection angle of the injection nozzle 10 is changed. be able to. For example, as shown in FIG. 9A, the rod 8 of the direct acting pneumatic cylinder 6 is moved to
To the injection position L1, which is higher than the processing position. Then, the injection angle of the injection nozzle 10 can be changed by the rotary pneumatic cylinder 60 to an injection angle suitable for the processing location within the range of the angle θ1.

Further, as shown in FIG. 9B, the injection nozzle 10 is moved to the injection position L2, which is lower than the processing position. Then, the injection angle of the injection nozzle 10 can be changed by the rotary pneumatic cylinder 60 to an injection angle suitable for the processing location within the range of the angle θ2. Thereby, the working fluid can be sprayed even from a substantially horizontal direction.

The injection position and the injection angle of the injection nozzle 10 are as follows.
By the processing of step 110 of the control processing described above, the calculation is performed by the processing of step 130 based on the length of the tool 4 to be exchanged from the main controller 50, the processing conditions, and the like.
Then, by executing the processing of steps 140 to 180,
Linear pneumatic cylinder 6 and rotary pneumatic cylinder 60
May be controlled.

Further, a third embodiment different from the second embodiment described above.
An embodiment will be described with reference to FIG. In the third embodiment, the direct-acting pneumatic cylinder 80 is attached to the rotating shaft 62 of the rotary-type pneumatic cylinder 60, and the injection nozzle 10 is attached to the rod 82 of the direct-acting pneumatic cylinder 80. The direct-acting pneumatic cylinder 80 has the same configuration as the direct-acting pneumatic cylinder 6 described above, but may be smaller.

The linear motion type pneumatic cylinder 80 is also provided with a linear sensor (not shown), and the linear sensor is connected to the input circuit 36. The servo valve 84 is also connected to the direct-acting pneumatic cylinder 80 via air tubes 86 and 88, and the servo valve 84 is connected to the output circuit 38. As a result, as shown in FIG. 10, the direct-acting pneumatic cylinder 80 is driven so that the injection nozzle 10 can be set at the protruding position L3 which is closer to the processing position by the tool 4.

The servo valve 84 is controlled by the pneumatic servo controller 30. The protruding position L3 is determined at step 13 by the length of the tool 4 to be exchanged from the main controller 50 and processing conditions by the processing at step 110 of the control processing described above.
0 is calculated. Then, the movement of the direct acting pneumatic cylinder 80 may be controlled by executing the processing of steps 140 to 180.

In the above-described embodiment, the case where the linear sensor 16 is used for the direct-acting pneumatic cylinder 6 is described as an example. Alternatively, as shown in FIG. A plurality of switches SW1 to SW8 may be provided at the positions, and the injection position of the direct acting pneumatic cylinder 6 may be controlled based on the detection signals from the switches SW1 to SW8.

As shown in FIG. 12, a pair of proximity switches SR1 and SR2 are provided on the direct-acting pneumatic cylinder 6, and the direct-acting pneumatic cylinder 6 is connected to the proximity switches SR1 and S2.
By reciprocating between two points provided with R2, it is possible to cope with the lengths of the two types of tools 4 with a simple configuration.

Further, as shown in FIG. 13, by providing a pair of proximity switches SR3 and SR4 in the rotary pneumatic cylinder 60 instead of the rotary sensor 66, the injection angle of the injection nozzle 10 can be similarly simplified. Can be changed between two points.

As shown in FIG. 14, a proximity switch S is connected to a direct-acting pneumatic cylinder 80 instead of a linear sensor.
By reciprocating between two points provided with R5 and SR6, it is possible to change to two types of protruding positions with a simple configuration. As described above, the present invention is not limited to such embodiments at all, and can be implemented in various modes without departing from the gist of the present invention.

[0032]

As described above in detail, the working fluid jetting device for a machine tool according to the present invention drives and drives a direct acting pneumatic cylinder when the relative positional relationship between the jetting nozzle and the processing location changes due to tool change. By controlling, the injection nozzle is moved according to the length of the replaced tool, and the effect is achieved that the injection nozzle can be moved to a position suitable for the processing location.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a working fluid ejection device for a machine tool as one embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a direct acting pneumatic cylinder incorporating a linear sensor according to the embodiment.

FIG. 3 is an enlarged cross-sectional view of a direct acting pneumatic cylinder incorporating a linear sensor according to another embodiment.

FIG. 4 is an enlarged cross-sectional view of a direct acting pneumatic cylinder to which a linear sensor according to another embodiment is mounted on the outside.

FIG. 5 is a flowchart illustrating an example of a control process performed in the pneumatic servo control device according to the embodiment.

FIG. 6 is a schematic configuration diagram of a machining fluid ejection device for a machine tool as a second embodiment.

FIG. 7 is an enlarged sectional view of a rotary pneumatic cylinder incorporating a rotary sensor used in the second embodiment.

FIG. 8 is a schematic configuration diagram of a machining fluid ejection device for a machine tool as a third embodiment.

FIG. 9 shows the injection position of the injection nozzle in the second embodiment.
It is explanatory drawing which shows an injection angle.

FIG. 10 is an explanatory diagram showing an ejection position and an ejection angle of an ejection nozzle in a third embodiment.

FIG. 11 is a configuration diagram of a direct acting pneumatic cylinder using a number of proximity switches instead of linear sensors.

FIG. 12 is a configuration diagram of a direct acting pneumatic cylinder that reciprocates between two positions using two proximity switches instead of linear sensors.

FIG. 13 is a configuration diagram of a rotary pneumatic cylinder using a proximity switch instead of a rotary sensor.

FIG. 14 is a configuration diagram of a direct-acting pneumatic cylinder that uses two proximity switches instead of the linear sensor and protrudes and retracts the injection nozzle between two positions.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Spindle head 2 ... Spindle 4 ... Tool 6, 80 ... Linear motion pneumatic cylinder 8 ... Rod 10 ... Injection nozzle 14 ... Workpiece 16 ... Linear sensor 26 ... Moving mechanism 30 ... Pneumatic servo control device 42, 68, 84 ... Servo valve 50 ... Main control unit 60 ... Rotary pneumatic cylinder 66 ... Rotary sensor

 ──────────────────────────────────────────────────続 き Continuation of the front page (71) Applicant 591034361 Ruiter Strase 82, 73734 Esslingen, Germany (72) Inventor Tsuneka Sato 1-26-10 Hayabuchi, Tsuzuki-ku, Yokohama-shi, Kanagawa Prefecture F-term (reference) 3C002 HH09 3C011 EE09

Claims (5)

[Claims] 1. A machine fluid injection device for a machine tool, wherein a tool selected by a tool changing mechanism is mounted on a spindle of a machine tool, and a machining fluid is ejected from an ejection nozzle to a machining position of a workpiece by the tool. A moving mechanism having a direct-acting pneumatic cylinder for moving the spray nozzle in a direction parallel to the axial direction of the tool, and controlling the moving mechanism in accordance with the change of the tool so that the spray nozzle corresponds to the processing location. A machining fluid ejection device for a machine tool, comprising: a control unit for moving the ejection fluid to an ejection position. 2. The moving mechanism further comprises a rotary pneumatic cylinder that is moved by the linear pneumatic cylinder, and the injection angle of the injection nozzle can be changed by the rotary pneumatic cylinder. The machining fluid injection device for a machine tool according to claim 1. 3. The work according to claim 1, wherein the moving mechanism further includes a direct-acting pneumatic cylinder that moves the injection nozzle in a direction intersecting the axial direction of the main shaft. Machine fluid injection equipment. 4. The machining fluid injection device for a machine tool according to claim 1, wherein said control means controls said moving mechanism in accordance with a length of said exchanged tool. 5. A sensor for detecting a moving amount of the injection nozzle by the direct-acting pneumatic cylinder, wherein the control means controls the moving mechanism according to the moving amount and a length of the replaced tool. 4. The machining liquid jetting device for a machine tool according to claim 1, wherein: