Machine tool provided with a protection cover

Abstract

Provided is a machining tool having a telescopic cover, with a plurality of covers sequentially overlapped and telescopic in the moving direction of the movable portion of the machine tool. The machining includes a lubricant supply unit to supply a lubricant to a slide portion of the telescopic cover.

Claims

1. A machining tool, comprising: a telescopic cover having a plurality of covers sequentially overlapped and telescopic in a moving direction of a movable portion of the machine tool; and lubricant supply units configured to supply a lubricant to a surface of the telescopic cover, wherein the telescopic cover has a fixed part, and a moving part movable in the moving direction relative to the fixed part, and the lubricant supply units are installed at both the moving part and the fixed part of the telescopic cover.

2. The machining tool according to claim 1, further comprising: a lubricant supply amount adjustment unit configured to adjust an amount of the lubricant supplied to the surface of the telescopic cover by the lubricant supply units.

3. The machining tool according to claim 2, wherein the lubricant supply amount adjustment unit is configured to adjust the amount of the lubricant based on a drip position of the lubricant on the surface of the telescopic cover.

4. The machining tool according to claim 2, wherein the lubricant supply amount adjustment unit is configured to adjust the amount of the lubricant based on a machining condition of the machining tool.

5. The machining tool according to claim 2, wherein the lubricant supply amount adjustment unit is controllable to adjust the amount of the lubricant based on a material of a workpiece to be machined by the machining tool.

6. The machining tool according to claim 2, wherein the lubricant supply amount adjustment unit is configured to adjust the amount of the lubricant based on an operation time of the machining tool.

7. The machining tool according to claim 1, further comprising: a lubricant drip frequency adjustment unit configured to adjust a lubricant supply frequency of the lubricant from the lubricant supply units to the surface of the telescopic cover.

8. The machining tool according to claim 7, wherein the lubricant drip frequency adjustment unit is configured to adjust the lubricant supply frequency based on a dripping point of the lubricant on the surface of the telescopic cover.

9. The machining tool according to claim 7, wherein the lubricant drip frequency adjustment unit is configured to adjust the lubricant supply frequency based on a machining condition of the machining tool.

10. The machining tool according to claim 7, wherein the lubricant drip frequency adjustment unit is controllable to adjust the lubricant supply frequency based on a material of a workpiece to be machined by the machining tool.

11. The machining tool according to claim 7, wherein the lubricant drip frequency adjustment unit is configured to adjust the lubricant supply frequency based on an operation time of the machining tool.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The above-described object, the other object, and the feature of the invention will be proved from the description of embodiments below with reference to the accompanying drawings. In these drawings:

(2) FIGS. 1A, 1B are views showing a machine tool of one embodiment of the invention.

(3) FIGS. 2A, 2B are views showing a machine tool of the second embodiment of the invention.

(4) FIGS. 3A, 3B are views showing a machine tool provided with a conventional telescopic cover.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(5) In the description hereinafter, same remarks are used to the same or resemble configuration.

(6) A machining tool provided with a telescopic cover in one embodiment of the invention is explained with the FIGS. 1A and 1B. FIG. 1A shows a top view of a machine tool provided with a telescopic cover of the present embodiment, and the FIG. 1B shows a front view of the same. Basic configuration of the machining tool of the embodiment is same as the configuration of the conventional machining tool with the telescopic cover explained with the FIGS. 3A, 3B.

(7) In the machining tool of the present embodiment, two kinds of lubricant supply units are installed in the neighborhood of telescopic covers 9, 10, 11, and 12. One of the lubricant supply units is a moving part side lubricant supply unit 13 installed in the moving part of the telescopic covers 9, 10, 11, and 12, and the other is a fixed side lubricant supply unit 14 installed in the fixed part of the telescopic covers 9, 10, 11, and 12. Lubricant is supplied to the two kinds of lubricant supply units from a lubricant supply equipment 15 via a lubricant supply channel 16 so as to properly drip lubricant on a surface of the telescopic covers 9, 10, 11, 12.

(8) In the machining tool of the present embodiment, a lubricant supply amount adjustment unit 17 may be installed in the lubricant supply equipment 15, so as to adjust a lubricant supply amount when a lubricant is dripped on the surface of the telescopic covers 9, 10, 11 and 12 depending on the various conditions.

(9) As an example of the lubricant supply amount adjustment unit installed in the lubricant supply equipment 15, a lubricant drip amount adjustment unit for adjusting a drip amount of the lubricant may be installed. When the lubricant is dripped on the surface of the telescopic covers 9, 10, 11, and 12, the lubricant drip amount adjustment unit may be operated to change and adjust a lubricant supply amount by changing the drip amount, based on the dripping point at the same time considering a number of moving part side lubricant supply units 13 and fixed side lubricant supply units 14, and based on the material of the workpiece to be machined. The lubricant drip amount adjustment unit may be implemented as a button, a knob or a lever on a control panel of the lubricant supply equipment 15. Any configuration that can adjust a lubricant supply amount by hand is adopted.

(10) In addition, the lubricant supply amount may be changed and adjusted in the lubricant supply equipment 15 to change the lubricant drip amount, based on machining condition or a commanded value for machining such as a main spindle rotation speed or a feed rate in a machining program.

(11) Furthermore, the lubricant supply amount may be changed and adjusted in the lubricant supply equipment 15 to change the lubricant drip amount based on a use period or an operation time of the machining tool.

(12) A controller, not shown in the figures, may give a command to change and adjust the lubricant supply amount in order to change the lubricant drip amount, instead of adjusting the lubricant supply amount by hand using the lubricant drip amount adjustment unit in the lubricant supply equipment 15. This configuration enables an automatic control of drip amount based on a parameter of, above-mentioned, the drip position, the workpiece material, the machining condition or the command value for machining such as a rotation speed of a main spindle or feed rate.

(13) In addition, as another example of the lubricant supply amount adjustment unit 17 installed in the lubricant supply equipment 15, the lubricant supply amount adjustment unit 17 may be implemented as a lubricant drip frequency adjustment unit for change and adjust a lubricant dripping frequency. More specifically, when lubricant is dripped on a surface of the telescopic covers 9, 10, 11, and 12, the lubricant drip frequency adjustment unit may be operated to change the lubricant drip frequency, based on the dripping point at the same time considering a number of moving part side lubricant supply units 13 and fixed side lubricant supply units 14, and based on material of a workpiece to be machined. The lubricant drip frequency adjustment unit may be implemented as a button, a knob or a lever on the control panel of the lubricant supply equipment 15. Any configuration that can adjust a lubricant drip frequency by hand is adopted.

(14) In addition, the lubricant drip frequency may be changed by the lubricant drip frequency adjustment unit in the lubricant supply equipment 15 to change the lubricant drip amount, based on machining condition or a commanded value for machining such as a main spindle rotation speed or feed rate in a machining program.

(15) In addition, the lubricant drip frequency may be changed in the lubricant supply equipment 15 to change the lubricant drip frequency based on a use period or an operation time of the machining tool.

(16) A controller, not shown in the figures, may give a command to the lubricant supply equipment 15 in order to change the lubricant drip frequency using the lubricant drip frequency adjustment unit, instead of adjusting the lubricant drip frequency by hand using the lubricant drip amount adjustment unit in the lubricant supply equipment 15. This configuration enables an automatic control of drip frequency based on a parameter of, above-mentioned, the drip position, the workpiece material, the machining condition and the command value for machining such as a rotation speed of a main spindle or feed rate.

(17) Based on a form of each part of machining tool and operation condition, appropriate forms and numbers of moving part side lubricant supply units 13 and fixed side lubricant supply units 14 may be chosen. In addition, as for the lubricant, an oil or a grease supplied to a ball screw or a linear guide may be used.

(18) The application of the invention is not limited to an example of supplying lubricant to such a telescopic cover that protects components disposed as a table is moved explained in the present embodiment, but also applicable to a machining tool with the other configuration of, for example, a column is moved.

(19) FIG. 2A is a top view of a machine tool provided with a telescopic cover with a configuration that a column is moved, and FIG. 2B is a side view of the same.

(20) In the machining tool shown in FIGS. 2A and 2B, a table 3 for securing a workpiece 7 is directly mounted on the bed 1. On the bed 1, column 4 is mounted via the base 18. A tool 6 is attached to the head of the main spindle 5, and the column 4 supports the main spindle 5. A splash guard 8 is provided around the bed 1 to cover the whole machining tool.

(21) A feed mechanism, not shown in the figures, is provided between the base 18 and the column 4. The column 4 is moved by driving a feed mechanism. Telescopic covers 9, 10, 11, and 12 are provided on the front side, rear side, and right and left sides of the table 3, in order to protect, for example, the top side of the saddle 2 and the feed mechanism, disposed to chips or the like, as the column 4 is moved.

(22) In this configuration, two kinds of lubricant supply units, i.e., a moving part side lubricant supply unit 13 and a fixed side lubricant supply unit 14, are installed in the neighborhood of the telescopic covers 9, 10, 11, and 12. Lubricant is supplied to the two kinds of lubricant supply units from a lubricant supply equipment 15 via a lubricant supply channel 16 so as to properly drip a lubricant on a surface of the telescopic covers 9, 10, 11, 12, to achieve the above mentioned effect.