JP2006167836A - Splash guard of machine tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a splash guard of a machine tool including a winding cover for guarding a guide part of a feed shaft of a spindle head, attaining good sealing performance even if the spindle head is moved at high speed. <P>SOLUTION: For the X-axis movement of the spindle head 1, wipers 17 and 10 provided inside an X-axis frame 15 are pressed to the winding cover 7 moved with the spindle head 1 to perform sealing, and for the Y-axis movement of the spindle head 1, wipers 31 and 33 provided inside the Y-axis frame 21 are pressed to a winding cover 23 moved with an Y-axis frame 15 engaged with the spindle head 1 to perform sealing from chips and coolant. These wipers are made of a spring member of a thin metal sheet, and a reinforcement plate is fixed to the central part of a lip part to prevent the central part of the lip part from being bent. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention guards the guide part of the feed shaft of the machine tool so that chips and coolant generated when machining the workpiece do not enter the guide part of the machine tool's feed shaft or splash outside the machine. The present invention relates to a splash guard for a machine tool that surrounds a machining area.

A winding cover device that protects a spindle head of a machine tool and a guide portion of a table is disclosed in Patent Document 1 related to the application of the present applicant. Referring to FIG. 1, sheet-like winding covers 15 and 17 are provided on both sides in the moving direction of the spindle head 5, and the winding covers 15 and 17 move along with the movement of the spindle head 5. It is wound around rollers 11 and 13 provided on both sides.
A scraper for preventing chips and coolant from entering the sliding surface is disclosed in Patent Document 2. Referring to FIG. 1, a metal thin plate 16 is attached to the lip portion 12 of the elastic member 10 in which a rubber material is formed in a dogleg shape, a protective member 17 is attached to the metal thin plate 16, and a tip portion 16 a of the metal thin plate 16. Is a scraper adapted to come into contact with the sliding surface.
Further, a wiper device for protecting a sliding surface of a machine tool is disclosed in Patent Document 3. Referring to FIG. 2, a wiper in which an edge portion 25 c of a scraper 25 made by bending a thin elastic plate material having a high hardness into a U shape is formed in an arc shape, and the arc portion is in contact with the moving cover 13. It is.

JP-A-9-285940 JP 2000-42863 A JP 2004-58182 A

The winding cover device described in Patent Document 1 described above is a winding cover that protects the guide portion of the feed shaft in which the spindle head moves in the X-axis direction. It is not suitable for the cover. And the wiper device which seals a chip, coolant, etc. is not indicated. In the scraper described in Patent Document 2, since the elastic member is a molded product of a rubber material, the elastic member must be molded with a rubber mold, and it is difficult to manufacture a long object. Since the wiper device described in Patent Document 3 forms a wiper portion 25b by bending a thin elastic plate material having a high hardness into a U-shape, when chips collide with the wiper portion 25b or when chips accumulate. The wiper portion 25b is distorted and a gap is formed between the wiper portion 25b and the moving cover. When a thick elastic material is used so that the wiper portion 25b is not distorted, there is a problem in that the sealing performance deteriorates because the moving cover does not follow high-speed vibration generated when moving at high speed.
The present invention has been made in order to solve these problems, and an object of the present invention is to provide a wiper with a windshield cover even when the spindle head moves at a high speed and the windup cover vibrates at a high speed. It is intended to provide a splash guard for a machine tool with good sealing performance that follows the vibration of the above and does not cause a gap between the winding cover and the wiper.

  In order to achieve the above object, according to the present invention, a spindle guard having a horizontal or vertical tool spindle moves in a vertical plane of an XY axis or an XZ axis. A sheet-shaped take-up cover that partitions the guide portion of the head feed shaft and the machining area, is provided before and after the spindle head in the moving direction, and moves as the spindle head moves, and each feed shaft of the spindle head A pair of rollers for winding the winding cover on the outside of the moving range, connecting the pair of rollers with a belt, and the pair of rollers rotating together with the movement of the spindle head; A wiper that is provided to surround the moving range of each feed shaft of the spindle head, is made of a metal thin plate spring member, and seals the tip of the spring member against the winding cover by the pressing force of the spring member And the W -Is composed of an attachment part and a lip part, the lip part is bent toward the front surface of the wiper, and a reinforcing plate for increasing the rigidity of the central part is attached to the central part of the lip part. A guard is provided.

  In this way, the guide portion of the feed shaft that intersects the X-axis and Y-axis of the spindle head is guarded by the take-up cover, and a pair of take-up rollers provided outside the moving range before and after the moving direction of the spindle head are belted. And the pair of take-up rollers rotate together with the movement of the spindle head. The wiper is made by bending a spring member made of a thin metal plate, and a reinforcing plate is attached to the center portion of the lip portion so as to increase the rigidity of the center portion so as to prevent the bending. The part was pressed against the take-up cover to seal chips and coolant.

  According to the present invention, the pair of winding rollers for winding the winding cover is connected by the belt, and both the pair of winding rollers rotate in conjunction with the movement of the spindle head. Even if it was moved with, the run-out cover was less shaken and bent. The wiper is made of a thin metal spring member, and a reinforcing plate is attached to the center of the lip portion of the wiper so as to prevent the spring member from being bent. The tip of the lip portion is used as a winding cover by the pressing force of the spring member. It was made to contact. Therefore, even if the spindle head moves at high speed and the winding cover vibrates at high speed, the tip of the wiper follows the vibration of the winding cover, and no gap occurs between the winding cover and the wiper. Improved sealing performance. In addition, since a reinforcing plate is attached to the center portion of the lip portion to increase the rigidity, the lip portion is not distorted or damaged even when the chips strongly collide with the wiper, thus extending the life.

  A preferred embodiment of a splash guard for a machine tool according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a part of a splash guard of a machine tool according to the present invention and showing a winding cover portion of a feed shaft of the X axis and the Y axis of the spindle head. FIG. 2 is an explanatory diagram of the structure of the winding cover in which the spindle head moves to the X axis. FIG. 3 is an enlarged cross-sectional view of the wiper portion of the present invention.

  The present invention relates to a splash guard that prevents chips and coolant from entering the guide part of the feed shaft of a machine tool and prevents them from splashing outside the machine. Since it is a known structure, the drawings are omitted. FIG. 1 shows a structure of a winding cover in which a spindle head having a horizontal tool spindle in a horizontal machining center guards a guide portion of a feed shaft that moves in an X axis (left and right direction) and a Y axis (vertical direction). Is. FIG. 2 shows only the structure of the take-up cover that guards the guide portion of the X-axis feed shaft for easy understanding of the structure of the take-up cover in FIG.

  If it demonstrates from FIG. 2, the spindle head 1 has the main shaft 3 which mounts a tool, and is guided so that the movement to the left-right direction is possible by the guide apparatus of the X-axis direction (left-right direction) which is not shown in figure. A bracket 5 is attached to the spindle head 1, and one end of a take-up cover 7 is attached to the bracket 5. The winding cover 7 is attached to the left and right sides of the spindle head 1 symmetrically. The other end of the winding cover 7 is wound around a pair of winding rollers 9 provided on both left and right sides outside the stroke range of the X axis (left and right direction). The winding cover 7 is made of a sheet-like stainless steel plate. A pulley 11 is attached to the shaft of the winding roller 9 and is connected by a belt 13. When the spindle head 1 is moved in the X axis (left-right direction) by an X-axis drive device (not shown), the winding cover 7 on the rear side in the moving direction is pulled, and the winding cover 7 is pulled out from the winding roller 9. The At the same time, since both the winding rollers 9 are connected by the belt 13, the winding roller 9 on the front side in the moving direction rotates, and the winding cover 7 on the front side in the moving direction of the spindle head 1 is wound without sagging. It is wound around the take-up roller 9. An X-axis frame 15 is provided on the front surface of the winding cover 7 so as to be slidable with respect to a Y-axis frame 21 described later. The left and right wipers 17 and the upper and lower wipers 19 are attached to the inside of the X-axis frame 15. The length in the left-right direction inside the X-axis frame 15 surrounds the range in which the spindle head 1 moves in the X-axis (left-right direction) stroke. The wiper 17 is attached to the left and right inner sides of the X-axis frame body 15, and the wiper 19 is attached to the upper and lower inner sides of the X-axis frame body 15.

  Next, FIG. 1 will be described. FIG. 1 shows a winding cover device that guards the guide portion of the feed shaft in the Y-axis (vertical direction) of the spindle head 1, and the X-axis winding cover device shown in FIG. It moves in the Y axis (vertical direction). A Y-axis frame 21 is attached to the frame of the splash guard (not shown). One end of a winding cover 23 is attached to both sides in the vertical direction outside the X-axis frame 15. The winding cover 23 is attached to both the upper and lower sides of the X-axis frame 15 symmetrically. The other end of the winding cover 23 is wound around a pair of winding rollers 25 provided on both upper and lower sides outside the stroke range of the Y axis (vertical direction). A pulley 27 is attached to the shaft of the winding roller 25 and is connected by a belt 29. When the spindle head 1 is moved in the Y-axis (vertical direction) by a Y-axis drive device (not shown), the winding cover 23 on the rear side in the moving direction is pulled, and the winding cover 23 is pulled out from the winding roller 25. The At the same time, since both the winding rollers 27 are connected by the belt 29, the winding roller 25 on the front side in the moving direction rotates, and the winding cover 23 on the front side in the moving direction of the spindle head 1 is wound without sagging. It is wound around the take-up roller 25. A Y-axis frame 21 is provided on the front surface of the winding cover 23. The length in the vertical direction inside the Y-axis frame 21 includes a length that allows the spindle head 1 and the X-axis frame 15 to move along the stroke of the Y-axis (vertical direction). Since the X-axis frame 15 is engaged with the spindle head 1, the X-axis frame 15 moves up and down in the Y-axis frame 21 as the Y-axis of the spindle head 1 moves. Since the X-axis frame 15 and the pair of winding rollers 9 are connected by a frame (not shown), the pair of winding rollers 9 also move in the vertical direction simultaneously with the spindle head 1. A Y-axis frame 21 is provided on the front surface of the winding cover 23, and upper and lower wipers 31 and left and right wipers 33 are attached to the inner side of the Y-axis frame 21. The wiper 31 is attached to the upper and lower inner sides of the Y-axis frame body 21, and the wiper 33 is attached to the left and right inner sides of the Y-axis frame body 21.

  FIG. 3 is a cross-sectional view showing how the wipers 17, 19, 31 and 33 are attached. In FIG. 3, description will be made using the reference numeral of the X-axis wiper 17. The wiper 17 is made of a metal thin plate spring member, and includes an attachment portion 17a and a lip portion 17b. The attachment portion 17a is attached to the inside of the X-axis frame 15 with a bolt 39 via a holding plate 37. . As the metal thin plate spring member, a spring phosphor bronze plate, a spring titanium copper plate, or the like is used. The plate thickness of the spring member is usually about 0.1 mm to 0.2 mm, and a phosphor bronze plate for spring of 0.1 mm is used in this embodiment. The lip portion 17b is formed to bend toward the front surface of the wiper 17 with respect to the attachment portion 17a. The angle of inclination of the bending is usually about 30 to 60 degrees, and is 45 degrees in this embodiment. The bent portion 17c is formed in a small arc shape so that the spring member does not break. The tip portion 17d of the lip portion 17b is pressed against the winding cover 7 by the pressing force of the spring member. The distal end portion 17d is pressed against the winding cover 7 so that there is no gap while being elastically deformed by the pressing force of the spring member. The central portion 17e of the lip portion 17b is fixed by a rivet 43 so that the central portion 17e is not greatly distorted by the pressing force of the spring member, that is, in order to prevent elastic deformation. Yes. The reinforcing plate 41 is fixed over the entire length of the wiper 17 in the longitudinal direction. The reinforcing plate 41 is a rolled steel plate such as a carbon tool steel plate. Only one reinforcing plate 41 may be fixed to one side of the spring member, or the reinforcing plate 41 may be fixed not by the rivet 43 but by other fixing means such as a bolt or an adhesive. The wipers 19, 31 and 33 are the same as the above description of the wiper 17.

Since the reinforcing plate 41 is attached to the central portion 17e of the lip portion 17b and the central portion 17e is formed to be higher in rigidity than the bent portion 17c and the tip portion 17d, when the pressing force of the spring member acts on the wiper 17, The central portion 17e does not bend, and the pressing force acts on the tip portion 17d as it is, and the tip portion 17d is elastically deformed. Since the central portion 17e does not bend, the tip portion 17d can make strong contact with the take-up cover. The minute vibration generated when the winding cover 7 moves at high speed is absorbed by the elastic deformation of the tip portion 17d, and the relatively large swell of the winding cover 7 is absorbed by the elastic deformation of the bent portion 17c. Has been. With such a configuration, even if the spindle head 1 moves at high speed and the winding cover 7 has high-speed vibration and relatively large undulations, the wiper 17 has a good response to elastic deformation, and the winding cover 7 Follow the vibration well. For this reason, there is no gap between the winding cover 7 and the wiper 17, so that the sealing performance of chips and coolant is improved.
In this embodiment, the X-axis frame 15 moves up and down in the Y-axis frame 21. However, as another embodiment, the X-axis frame 15 is enlarged and the X-axis frame 15 is moved. The Y-axis frame 21 may move up and down. In this embodiment, the horizontal machining center has been described. However, the present invention can also be applied to a vertical machining center.

It is a figure which shows a part of splash guard of the machine tool of this invention, and is the perspective view which showed the winding-up cover part of the feed shaft of the X-axis of a spindle head, and a Y-axis. It is structure explanatory drawing of the winding cover in which a spindle head moves to an X-axis. It is sectional drawing which expanded and showed the part of the wiper of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Spindle head 7 Winding cover 9 Winding roller 13 Belt 15 X axis frame body 17 Wiper 19 Wiper 21 Y axis frame body 23 Winding cover 25 Winding roller 29 Belt 31 Wiper 33 Wiper 41 Reinforcement plate

Claims (1)

A machine tool splash guard in which a spindle head having a horizontal or vertical tool spindle moves in a vertical plane of an XY axis or an XZ axis,
A sheet-shaped winding cover that partitions the guide portion of the feed shaft of the spindle head and the machining area, is provided before and after the movement direction of the spindle head, and moves with the movement of the spindle head;
A pair of rollers for winding the take-up cover is provided outside the moving range of each feed shaft of the spindle head, the pair of rollers are connected by a belt, and the pair of rollers are interlocked with the movement of the spindle head. Winding roller means for rotation;
A wiper that surrounds the moving range of each feed shaft of the spindle head, is made of a metal thin plate spring member, and presses and seals the tip of the spring member against the winding cover with the pressing force of the spring member; Comprising
The wiper includes an attachment portion and a lip portion. The lip portion is bent toward the front surface of the wiper, and a reinforcing plate for increasing the rigidity of the central portion is attached to the central portion of the lip portion. Splash guard.

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