JPS6130844B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hydraulically operated machine tool equipped with a hydraulic motor or other hydraulic actuator.

This type of machine has a drive unit on the base that can move freely toward the jig table in front, a fixed rail at the rear surrounding the drive unit, and a movable front part that moves back and forth along with the drive unit. An annular rail consisting of a rail is provided, any one of a plurality of head frames mounted on the annular rail can be selected on the movable rail, and the selected head frame is driven by the advancement of the drive unit. It is known that the head frame is connected to the head frame and is provided with a processing unit, the processing unit, and a hydraulic motor or other hydraulic actuator for operating the processing unit.

However, in such a system, the head frame equipped with the hydraulic actuator moves on an annular rail, which causes problems such as troublesome hydraulic piping.

The present invention aims to improve such inconveniences, and includes a drive unit that is movable forward and backward toward the front jig table on the base, and a rear fixed rail that surrounds the drive unit. An annular rail consisting of a front movable rail that moves forward and backward along with the drive unit is provided, and any one of the plurality of head frames mounted on the annular rail can be freely selected on the movable rail, In the hydraulically operated machine tool, the selected head frame is connected to the drive unit by the advancement of the drive unit, and the head frame is provided with a machining unit and a hydraulic motor or other hydraulic actuator for operating the machining unit. The head frame is provided with an oil tank connected to the hydraulic actuator provided on the head frame, and a hydraulic oil circulation path that connects the oil tank to the hydraulic actuator, and is driven by coupling the drive unit to the operation circulation path. The present invention is characterized in that it is provided with a hydraulic pump and a liquid-cooled radiator, through which cutting fluid is passed to be supplied to the tool at the tip of the processing unit.

In order to eliminate such inconveniences, the present invention aims to provide a hydraulic fluid cooling device that uses cutting fluid used in machine tools and is simple in structure and inexpensive. In the installed hydraulically operated machine tool, a liquid-cooled radiator is interposed in the hydraulic oil circulation path to the hydraulic actuator, and cutting fluid is passed through the radiator as a refrigerant to be supplied to the tools installed in the machine tool. It is characterized by

Next, one example of implementing the present invention will be explained with reference to attached drawings.

FIG. 1 shows the overall configuration of a hydraulically operated machine tool. A pair of upper and lower annular rails 5 consisting of a fixed rail 5a and a movable front rail 5b is provided, and a plurality of head frames 6 are mounted on the annular rail 5, and any one of the head frames 6 is mounted on the annular rail 5. The movable rail 5 is moved by the upper indexing device 7.
b, and the movable rail 5b is attached to the drive unit 4 via the cylinder 8, and when the drive unit 4 is moved forward,
First, the movable rail 5b is given a backward motion of a constant stroke relative to the drive unit 4,
On the movable rail 5b, a coupling 9 on the back side of the head frame 6 selected, a cutting fluid joint 10, a positioning pin 11, a drive shaft 13 on the front side connected to the drive motor 12 of the drive unit 4, and a separate cutting fluid The liquid supply port 15 connected to the supply device 14 and the docking member 16 are connected, and then the head frame 6 is moved forward together with the movable rail 5b by the drive unit 4 toward the jig table 3 in front. I made it so that it would be done.

The head frame 6 is equipped with a machining unit 18 having a drill or other tool 17 at its tip.The machining unit 18 is rotated by a hydraulic motor 19 and fed by a hydraulic cylinder 20. The head frame 6 is configured to facilitate supply to these hydraulic actuators.
As clearly shown in FIG. 2, a hydraulic pump 21 on the front side is connected to the coupling 9 on the back side, and
Oil tank 22 utilizing the internal space of the head frame 6
A hydraulic oil circulation system 23 is configured in which the oil in the oil tank 22 is returned to the oil tank 22 by the hydraulic pump 21 via a hydraulic actuator consisting of the hydraulic motor 19 and the hydraulic cylinder 20. This facilitates oil supply to the hydraulic actuator, and further, according to the operation of the drive motor 12 described above, the hydraulic pump 21 is driven by the power transmitted via the drive shaft 13 and the coupling ring 9.
Hydraulic actuators 19 and 20 are connected to the circulation path 23.
The working fluid is circulated through the machining unit 18 to operate the workpiece W on the jig table 3, and a predetermined machining process is performed on the work W on the jig table 3. Cutting fluid is supplied to the tool 17 at the tip of the machining unit 18 via the fluid supply port 15, the cutting fluid joint 10, and the fluid supply path 24 connected thereto.

In the illustrated example, the machining units 18 are provided in a pair on the head frame 16, with a multi-axis type shown in FIG.

In the drawing, 25 is the processing unit control box, 26
27 indicates a hydraulic motor rotation control valve, and 27 indicates an oil filter.

Due to the circulation from the oil tank 22 provided in the head frame 6, since the tank 22 is small, the oil temperature tends to rise. Therefore, according to the present invention, a liquid-cooled radiator is installed in the hydraulic oil circulation path 23. 28, and the tool 17 is supplied to the radiator 28 as a refrigerant.
This allows the cutting fluid to be supplied to the

To explain this in detail with respect to the one shown in the figure, the head frame 6
As clearly shown in FIG. 3, a radiator 28 is mounted on the return side of the hydraulic oil circulation system 23 so that the hydraulic oil flows through a core 28a on the inner periphery of the radiator 28, and a jacket 28b on the outer periphery of the radiator 28. is interposed in the cutting fluid supply path 24 described above, so that the cooling effect of the oil in the radiator 28 is performed using the cutting fluid flowing in the jacket 28b as a refrigerant.

Here, the cutting fluid is supplied to the tool 17 in a vertical flow manner, so there is no need for a separate cooling device to circulate and cool the refrigerant like in a normal liquid cooling radiator.
In addition, unlike an air-cooled radiator, an air-cooling fan is not required, and a general cutting fluid supply device 14 installed in a machine tool can be used.
can be used as is to cool the oil.

According to the present invention, the hydraulic motor 19
The head frame 6 having a hydraulic actuator such as a hydraulic cylinder 20 is provided with an oil tank 22 connected to the hydraulic actuator and a hydraulic oil circulation path 23 connecting the oil tank 22 to the hydraulic actuator. The hydraulic pipe can be easily connected to the head frame 6 selected along the rail 5, and the hydraulic oil circulation path 23 is equipped with a hydraulic pump 21 driven by the drive unit 4 and a liquid-cooled radiator. 28, the hydraulic oil circulation system 23 does not operate unnecessarily, and even in a relatively small circulation system 23, the oil temperature does not rise and it operates accurately. Since the cutting oil is also passed through the radiator 28, the cooling device is operated with the running cost for supplying the cutting fluid, resulting in cost savings.

[Brief explanation of the drawing]

Fig. 1 is a partially cut-away side view of an example of a hydraulically operated machine tool to which the device of the present invention is applied, Fig. 2 is a cut-away side view of a head frame mounted on the machine tool, and Fig. 3 omits the processing unit. FIG. 4 is a front view of the head frame and a plan view of the processing unit. DESCRIPTION OF SYMBOLS 1... Base, 3... Jig stand, 4... Drive unit, 5... Annular rail, 5a... Fixed rail, 5
b...Movable rail, 6...Head frame, 17...Tool, 18...Machining unit, 19...Hydraulic motor, 20...Hydraulic cylinder, 21...Hydraulic pump, 22...Oil tank, 23... Hydraulic oil circulation system line, 28...radiator.

Claims (1)

[Claims] 1. A drive unit is provided on the base that can move forward and backward toward the jig table in front, and consists of a fixed rail at the rear that surrounds the drive unit, and a movable rail at the front that moves forward and backward along with the drive unit. An annular rail is provided, any one of a plurality of head frames mounted on the annular rail can be selected on the movable rail, and the selected head frame is coupled to the drive unit by advancing the drive unit. In a hydraulically operated machine tool in which the head frame is provided with a machining unit and a hydraulic motor or other hydraulic actuator for operating the machining unit, the head frame is provided with oil connected to the hydraulic actuator provided in the head frame. A tank and a hydraulic oil circulation system path connecting the oil tank to a hydraulic actuator are provided, a hydraulic pump driven by coupling with the drive unit is provided in the hydraulic oil circulation system path, and a liquid cooling type radiator is provided, and a liquid cooling type radiator is provided. A hydraulically operated machine tool, characterized in that a radiator is configured to pass cutting fluid to be supplied to a tool at the tip of the processing unit.