JPH0516107U - Machine tool sliding surface protection device - Google Patents

Abstract

(57) [Summary] [Purpose] To reliably prevent chips and cutting fluid from entering the telescopic cover, and to configure a mechanism therefor easily and inexpensively. [Structure] A telescoping cover 9 is coupled to a machine base 1 and a saddle 4 of a lathe to cover a sliding surface of a guide rail 2. A partition plate 19 is interposed between the saddle 4 and the telescopic cover 9, and an inlet port 20 is formed in the partition plate 19. An opening / closing valve 21 is attached to the partition plate 19 so as to cover the inlet 20. When the telescopic cover 9 is contracted, the opening / closing valve 21
Closes the inlet 20 and discharges the air inside the telescopic cover 9 from the gaps between the cover bodies 10 to 12 to remove chips or cutting fluid. When the telescopic cover 9 is extended, the opening / closing valve 21 opens the inlet 20 as the volume increases, and clean air on the saddle 4 side is sucked into the telescopic cover 9 from the inlet 20.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a sliding surface protection device that covers a sliding surface of a machine tool with a telescopic cover to protect it from chips and cutting fluid.

[0002]

[Prior Art]

 For example, as a conventional sliding surface protection device in a lathe, the techniques shown in FIGS. 4 to 6 are known. As shown in each drawing, a guide rail 2 is provided on the machine base 1, and a saddle 4 is slidably supported on the guide rail 2 via a slider 3 back and forth. A tool rest 5 is placed on the saddle 4, and when the saddle 4 moves forward, the cutting tool 6 cuts the work 8 held by the chuck 7. Reference numeral 9 denotes a telescopic cover, which is composed of a plurality of cover bodies 10, 11, 12 having a U-shaped cross section, which are connected in a telescopic manner. The cover body 10 at the front end is on the machine base 1, and the cover body 12 at the rear end is It is connected to the saddle 4. Then, the telescopic cover 9 expands and contracts with the movement of the saddle 4 to cover the guide rail 2 over the entire stroke, and the sliding surfaces of the guide rail 2 and the slider 3 are covered with foreign matter 14 such as chips and cutting fluid. It is designed to be protected from

By the way, since the telescopic cover 9 has a telescopic structure, it is unavoidable that a slight gap is formed in the combined portion of the cover bodies 10 to 12. In order to make this gap as small as possible, a wiper edge 15 made of rubber or synthetic resin is attached to the front edges of the covers 11 and 12. A preload is applied to the wiper edge 15 to wipe off the foreign matter 14 adhering to the surfaces of the cover bodies 10 and 12 when the telescopic cover 9 expands and contracts to prevent them from entering the inside. A guide bar 16 is fixed to the outer surface of the side walls of the covers 10 and 11, and a hooking piece 17 is stuck to the inner surfaces of the side walls of the covers 11 and 12. Then, by engaging the guide bar 16 and the hooking piece 17, a strong preload is applied to the wiper edge 15, and the degree of opening of the respective cover bodies 10 to 12 is restricted, so that the side surface of the telescopic cover 9 is prevented. The foreign matter 14 is prevented from entering. As a measure for preventing intrusion from the side, a telescopic cover having a structure in which the lower end portions of the side walls of the covers 10 to 12 are bent inward is also known.

[0004]

[Problems to be solved by the device]

 However, according to the conventional sliding surface protection device, in spite of the various intrusion prevention measures described above, a gap generated when the wiper edge 15 is unevenly worn, and a side surface between the guide bar 16 and the hooking piece 17 is formed. It is extremely difficult to completely eliminate the gaps in each part of the telescoping cover 9, such as the gaps and the undersides of the cover bodies 10 to 12. Still, there was a problem of intrusion. Therefore, an object of the present invention is to provide a sliding surface protection device that can reliably prevent chips and cutting fluid from entering the telescopic cover, and that can easily and inexpensively configure a mechanism therefor. ..

[0005]

[Means for Solving the Problems]

 In order to solve the above problems, the sliding surface protection device of the present invention is provided with a partition plate on the telescoping cover that covers the sliding surface of the machine tool, and clean air is introduced into the partition plate inside the telescoping cover. It is configured by forming an inlet and installing an on-off valve that closes the inlet when the telescoping cover contracts and opens the inlet when the telescoping cover expands.

[0006]

[Action]

 According to the sliding surface protection device of the present invention, since the inside of the telescopic cover is partitioned by the partition plate, when the telescopic cover contracts, the inlet is closed by the opening / closing valve due to the decrease in volume, and the air inside is closed. It is discharged from the gap to the outside. Therefore, this discharge air flow releases and eliminates fine chips and cutting fluid, and the entry of these foreign substances is reliably prevented. Further, when the telescopic cover is expanded, the opening / closing valve opens the inlet as the volume increases, and the clean outside air is sucked into the telescopic cover through the inlet. Therefore, the inside of the telescopic cover is always filled with clean air, and contamination by cutting chips is prevented. Moreover, since the opening / closing valve is caused to perform the breathing operation by utilizing the volume change associated with the expansion / contraction of the telescopic cover, the mechanism for preventing intrusion is simple and inexpensive.

[0007]

【Example】

 An embodiment in which the present invention is embodied in a lathe will be described below with reference to FIGS. In the sliding surface protection device of this embodiment, a partition plate 19 is provided between the slider 4 and the telescopic cover 9 so as to cover the opening of the cover body 12. The partition plate 19 is formed with a pair of inlets 20 for introducing clean air into the telescopic cover 9 from the lower side of the saddle 4. An opening / closing valve 21 made of a flexible material for opening / closing the inlet 20 is attached to the partition plate 19 with a screw 23 via a holding bar 22. Other configurations are the same as the conventional ones, the same reference numerals are given to the drawings, and the description thereof will be omitted. Next, the operation of the sliding surface protection device configured as described above will be described. The telescopic cover 9 expands and contracts with the movement of the saddle 4, and covers the guide rail 2 over the entire stroke. The sliding surfaces of the guide rail 2 and the slider 3 are protected from foreign matter 14 such as chips and cutting fluid. As shown in FIG. 1, when the saddle 4 advances, the telescopic cover 9 contracts and its volume decreases. Since the inside of the telescopic cover 9 is partitioned by the partition plate 19, the on-off valve 21 is pressed against the partition plate 19 by the pressure generated here, and the inlet 20 is closed by the on-off valve 21. Then, as the volume decreases, the air in the telescopic cover 9 is vigorously discharged to the outside through the gaps between the cover bodies 10 to 12. Therefore, this discharge air flow forcibly discharges and removes fine chips floating around the periphery of the telescopic cover 9 or cutting fluid adhering to the wiper edge 15 by surface tension to the cutting portion 13 side. It is possible to reliably prevent the foreign matter 14 from entering.

On the other hand, as shown in FIG. 2, when the saddle 4 is retracted, the telescopic cover 9 is expanded and its volume is increased. Therefore, the inside of the telescopic cover 9 is in a negative pressure state, and the opening / closing valve 21 separates from the partition plate 19 to open the introduction port 20. Then, as the volume increases, clean air on the lower side of the saddle 4 is sucked into the telescopic cover 9 through the inlet 20. Therefore, it is possible to constantly fill the inside of the telescopic cover 9 with clean air and prevent contamination by cutting chips. Further, since the opening / closing valve 21 is made to perform the breathing movement by utilizing the volume change associated with the expansion / contraction of the telescopic cover 9, the mechanism for preventing the intrusion can be configured easily and inexpensively, and the existing telescopic cover 9 can be added with few additional parts. It can be easily modified. Note that the present invention is not limited to the above-described embodiment, and for example, a pipe is connected to the introduction port, and clean air outside the fuselage is introduced into the inside of the telescopic cover through this pipe. Or applying it to sliding surfaces other than the saddle, or applying it to various machine tools other than lathes, etc., by appropriately changing the shape and configuration of each part without departing from the spirit of the present invention. It is also possible to convert.

[0009]

[Effect of the device]

 As described above in detail, according to the present invention, the inlet of the partition plate is configured to be opened and closed by the on-off valve as the telescoping cover expands and contracts, so that intrusion of chips and cutting fluid into the telescoping cover is prevented. It has an excellent effect that it can be surely prevented and that a mechanism therefor can be configured easily and inexpensively.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a sliding surface protection device for a lathe according to an embodiment of the present invention with an opening / closing valve closed.

FIG. 2 is a cross-sectional view showing the sliding surface protection device of FIG. 1 with an opening / closing valve opened.

3 is a sectional view taken along the line AA of FIG.

FIG. 4 is a side view showing a main part of a lathe.

FIG. 5 is a front view of FIG.

FIG. 6 is a cross-sectional view showing a conventional sliding surface protection device for a lathe.

[Explanation of symbols]

1 ... Machine stand, 2 ... Guide rail, 3 ... Slider, 4 ...
・ Saddle, 5 ・ ・ Turret, 6 ・ ・ bite, 7 ・ ・ Chuck, 8 ・ ・ Workpiece, 9 ・ ・ Telescopic cover, 10-12
..Cover bodies, 13 ... Cutting parts, 14 ...
・ Wiper edge, 16 ・ ・ Guide bar, 17 ・ ・ Latching piece, 19 ・ ・ Partition plate, 20 ・ ・ Inlet port, 21 ・ ・ Opening / closing valve, 22 ・ ・ Holding bar, 23 ・ ・ Screw

Claims (1)

[Scope of utility model registration request] 1. A partition plate is provided on a telescopic cover that covers a sliding surface of a machine tool, and the partition plate is provided with an inlet for introducing clean air into the telescopic cover. A sliding surface protection device for a machine tool, which is equipped with an opening / closing valve that closes the opening and opens the introduction opening when the telescopic cover is extended.