JP2010214569A - Cover structure of machine tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cover structure of a machine tool wherein a moving cover is bendable and a wiper for the moving cover can be mounted without jolting. <P>SOLUTION: The machine tool includes the moving cover 8, a moving guide 26 and the wiper 32. In the moving cover 8, a plurality of long narrow thin plate members 21 are aligned in parallel in their longitudinal direction and adjacent long narrow thin plate members 21 are connected with each other in an angle-variable manner and the moving cover 8 moves in the aligning direction of the respective long narrow thin plate members 21. The moving guide 26 guides movement of the moving cover 8. The wiper 32 contacts with plate surfaces of the long narrow thin plate members 21 of the moving cover 8 and removes chips and cutting oil adhered on the moving cover 8. The wiper 32 is arranged so that its longitudinal direction inclines for a longitudinal direction of the long narrow thin plate members 21. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a structure of a movable cover provided in a machine tool such as a lathe.

  There is a spindle moving lathe (for example, Patent Document 1) in which a spindle moves and conveys a workpiece. The thing of patent document 1 is a vertical lathe type in which the main axis turned to the vertical direction. In this type of spindle moving lathe, a part of the cover that covers the machining area during machining moves together with the spindle to avoid interference with the spindle. In the vertical lathe type, the portion covering the upper part of the machining area is a moving cover. In that case, when the moving cover moves together with the main shaft to the outside of the machining area, chips and cutting oil adhering to the inner surface of the moving cover may fall, and the lower workpiece and workpiece mounting table may be soiled. In order to avoid this, a wiper (for example, Patent Document 2) that removes chips and cutting oil adhering to the inner surface of the moving cover is provided.

JP 2007-98531 A Japanese Utility Model Publication No. 6-3547

  If the moving cover is moved in the shape when it covers the processing area, for example, in a flat plate shape, the end of the moving cover protrudes to the outside larger than the lathe body. In view of this, an attempt was made to reduce the amount of protrusion by bending the portion that goes out of the processing area as a configuration in which the movable cover can be bent. Specifically, as shown in FIG. 8, the movable cover 8 includes a plurality of elongated thin plate members 21 arranged in parallel with their longitudinal directions parallel to each other, and the adjacent elongated thin plate members 21 are connected to each other in a variable angle manner. The configuration. With this configuration, it is possible to bend while maintaining strength.

  However, when the movable cover 8 is configured as described above, a groove-like portion 24 that is recessed with respect to the plate surface is formed between the elongated thin plate members 21. Therefore, as shown in FIG. 8, when the movable cover 8 moves, there is a problem that the wiper 32 fits into the groove-like portion 24 and the wiper 32 rattles.

An object of the present invention is to provide a machine tool cover structure in which a movable cover is bendable, and a wiper for the movable cover is provided without rattling.
Another object of the present invention is to avoid interference between a processing device that moves together with the moving cover, for example, a main shaft and a wiper.
Still another object of the present invention is to ensure that the wiper does not fit into the groove-like portion of the moving cover.
Still another object of the present invention is to show a machine tool in which the effect is most noticeable.

  In the cover structure of the machine tool according to the present invention, a plurality of elongated thin plate members are arranged in parallel with their longitudinal directions parallel to each other, and the adjacent elongated thin plate members are connected to each other so that the angle can be varied. A moving cover that moves in the direction, a moving guide that guides the movement of the moving cover, and an elongated wiper that can contact the plate surface of the elongated thin plate member of the moving cover. The wiper is provided such that its longitudinal direction is inclined with respect to the longitudinal direction of the elongated thin plate member.

  According to the configuration of the present invention, the movable cover has a configuration in which a plurality of elongated thin plate members are arranged in parallel with their longitudinal directions parallel to each other, and the adjacent elongated thin plate members are connected to each other so that the angle is variable. The cover can be bent at any location. Since the longitudinal direction of the wiper is inclined with respect to the longitudinal direction of the elongated thin plate member of the moving cover, the wiper does not fit into the groove-like portion formed between the elongated thin plate members. Thereby, rattling of the wiper can be prevented.

In the present invention, the wiper can be supported by a wiper support member that is movable in a direction approaching and moving away from the moving cover.
If the wiper is supported by the wiper support member, when the processing device moves with the moving cover, for example, when the main shaft passes through the wiper installation position, the processing device and the wiper are moved by retracting the wiper to the side away from the moving cover. Interference can be avoided.

In this invention, it is desirable that the distance in the moving cover moving direction between the end points in the longitudinal direction of the wiper is at least wider than the width of the groove-shaped portion formed between a pair of adjacent thin thin plate members of the moving cover. .
If the length of the wiper in the moving cover moving direction is wider than the width of the groove-shaped portion between the elongated thin plate members, the wiper will not fit into the groove-shaped portion. Therefore, it is possible to reliably prevent the wiper from rattling.

In this invention, the machine tool may be a vertical lathe in which a main spindle oriented in the vertical direction grabs and conveys a workpiece, and the moving cover may move together with the main spindle.
When the machine tool is a vertical lathe, the moving cover is a cover portion that covers the upper portion of the spindle chuck provided at the lower end of the spindle. Chips and cutting oil adhere to the lower surface, which is the inner surface, at the time of processing on the movable cover including the cover portion. If the moving cover moves out of the processing area with the chips and cutting oil attached, the attached chips and cutting oil may fall and contaminate the lower workpiece and the work platform. If a wiper is provided, this can be avoided.

  In the cover structure of the machine tool according to the present invention, a plurality of elongated thin plate members are arranged in parallel with their longitudinal directions parallel to each other, and the adjacent elongated thin plate members are connected to each other so that the angle can be varied. A machine tool cover structure comprising: a moving cover that moves in a direction; a moving guide that guides the movement of the moving cover; and an elongated wiper that can contact a plate surface of the elongated thin plate member of the moving cover. Since the wiper is provided such that the longitudinal direction thereof is inclined with respect to the longitudinal direction of the elongated thin plate member, the movable cover can be bent, and the wiper for the movable cover is provided without rattling.

  When the wiper is supported by a wiper support member that is movable in a direction approaching and moving away from the moving cover, it avoids interference between the processing equipment that moves together with the moving cover, for example, the main shaft and the wiper. Can do.

  When the distance in the moving cover moving direction between the two end points in the longitudinal direction of the wiper is wider than at least the width of the groove-shaped portion formed between a pair of adjacent thin thin plate members of the moving cover, the groove of the moving cover It is possible to prevent the wiper from securely fitting into the shaped portion.

  The machine tool is a vertical lathe in which a main spindle facing in the vertical direction grabs and conveys a workpiece, and when the moving cover moves together with the main spindle, the effect of the present invention appears remarkably.

It is a front view of a machine tool provided with a cover structure concerning an embodiment of this invention. It is a partially broken side view of the machine tool. It is a perspective view of the principal part of the machine tool. It is the perspective view which looked at the main part of the machine tool from a different angle in a different state. (A) is sectional drawing of the movement guide and moving cover of the machine tool, (B) is sectional drawing of a different location of a movement guide and a moving cover. (A) is the front view which shows the positional relationship of the moving cover and wiper of the machine tool, (B) is the bottom view. It is sectional drawing of the connection part of the elongate thin plate member of the same movement cover. (A) is the front view which shows the positional relationship of the conventional moving cover and a wiper, (B) is the bottom view.

  An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a machine tool provided with a cover structure of the present invention, FIG. 2 is a partially cutaway side view thereof, and FIGS. 3 and 4 are perspective views of main parts of the machine tool showing different states. The machine tool 1 is a spindle moving type vertical lathe in which a main shaft directed in a vertical direction conveys a workpiece. On the side of the machine tool 1 (on the right side in this embodiment), a workpiece supply / discharge device 40 for supplying the workpiece W before processing and discharging the workpiece W after processing is installed. The workpiece supply / discharge device 40 in the illustrated example is of a type in which a table 41 on which a workpiece W is placed moves along a loop-shaped track.

  The bed 2 of the machine tool 1 includes a bed front portion 2a having a low height and a bed rear portion 2b having a high height, and a processing region R is formed on the upper side of the bed front portion 2a. The machining area R is an area where the workpiece 4 supported by the spindle 3 is cut by the cutter 4a of the tool post 4. The rear side of the processing region R is a bed rear part 2b and a back cover 5 protruding upward from the front upper end of the bed rear part 2a, the left and right sides are left and right side covers 6L and 6R, and the front side is a front cover 7 Are covered by a moving cover 8 and below by a bed front part 2a. An openable / closable shutter 9 described later is attached to the right side cover 6R. The front cover 7 has a door (not shown) with a transparent window so that the inside of the processing region R can be visually recognized from the outside. 1 and 3 show a state where the door of the front cover 7 is removed.

  A spindle chuck 10 that supports the workpiece W downward is provided at the lower end of the spindle 3. The spindle chuck 10 is configured to grip the workpiece W with a plurality of chuck claws 10a. The main shaft 3 is rotationally driven by a main shaft motor 11.

  The main shaft 3 is movable up and down and left and right by a main shaft moving means 12. The spindle moving means 12 includes a left / right moving table 14 that can move left and right along a left / right guide 13 provided on the bed rear portion 2b, and a lifting table that can move up and down along a vertical guide 15 provided on the left / right moving table 14. The spindle 3 and the spindle motor 11 are mounted on a spindle base 17 provided integrally with the elevator base 16. The left / right movement of the left / right moving base 14 is performed by a left / right moving drive source 18 installed in the bed rear portion 2b and a rotation / linear conversion mechanism such as a ball screw for converting the rotation of the left / right moving drive source 18 into a left / right operation (see FIG. Not shown). The movement range is between the processing position P1 in the processing region R and the supply / discharge position P2 above the workpiece supply / discharge device 40. The processing position P1 is not a fixed position but has a movable range on the left and right with the neutral position shown in FIG. 1 as the center. The lifting platform 16 is moved up and down by a lifting drive source 19 installed on the left and right moving table 14 and a rotation / linear conversion mechanism (not shown) that converts the rotation of the lifting drive source 19 into a vertical motion. Done.

  The tool post 4 is a turret tool post that can turn around a horizontal axis extending in the left-right direction, and a plurality of tools 4 a are attached to a polygonal peripheral surface. By rotating the tool post 4 about the horizontal axis, an arbitrary tool 4a is determined at a processing position for processing the workpiece W. 1 and 2, only one blade 4a is shown, and the other blades are omitted.

  As shown in FIG. 6, the movable cover 8 is formed by arranging a plurality of elongated thin plate members 21 in parallel with their longitudinal directions parallel to each other, and connecting the adjacent elongated thin plate members 21 to each other with a variable angle. In other words, the elongated thin plate member 21 is a strip-shaped plate member. Specifically, as shown in the cross-sectional view of FIG. 7, the elongated thin plate member 21 is a hollow rigid body made of a metal such as aluminum or a synthetic resin, and is provided with cuts 22 opened at the end faces at both ends, and adjacent elongated thin plates. By inserting both ends of an elastic material 23 such as rubber into a pair of opposed notches 22 of the member 21, the adjacent elongated thin plate members 21 are connected to each other with variable angles. Since the notch 22 has a wider back portion 22b than the entrance portion 22a, the elastic member 23 does not come out of the notch 22. The elongated thin plate member 21 is chamfered in a circular arc shape in a front view. For this reason, in the state where the elongated thin plate members 21 are arranged in a straight line, the groove-shaped portion 24 is formed between the adjacent elongated thin plate members 21. Since the movable cover 8 has the above-described configuration, the movable cover 8 has a structure that can be bent in the direction in which the long and thin plate members 21 are arranged while ensuring a certain thickness and maintaining strength.

  In FIGS. 1 to 4, an opening 25 (FIG. 3) is provided substantially at the center of the left and right of the movable cover 8, and the headstock 17 is inserted into the opening 25. The moving cover 8 is provided on both the left and right sides of the headstock 17 so as to be slidable relative to the headstock 17, and moves in the left-right direction along with the headstock 17 along a movement guide 26 provided above the processing region R. The movement guide 26 extends to the left and right sides of the processing region R, and both ends thereof are rising portions 26a and 26b rising upward. The moving guide 26 has a pair of front and rear guide rails 27, and the guide rails 27 support the front and rear ends of the moving cover 8 from below. The cross-sectional shape of the guide rail 27 is, for example, an L-shaped cross section as shown in FIG. 5A in the horizontal portion at the center of the left and right, and a cross-sectional groove shape as shown in FIG. 5B at the rising portions 26a and 26b. ing. In addition, a bottom plate 28 that connects the front and rear guide rails 27 is provided at the rising portions 26a and 26b.

  The right side cover 6 </ b> R is provided with a spindle passage opening 30 opened upward, and the shutter 9 is attached to the spindle passage opening 30. The shutter 9 is opened and closed by being moved up and down by an opening / closing drive source 31. The opening and closing of the shutter 9 is interlocked with the horizontal movement of the main shaft 3, and the shutter 9 is closed during processing, and the shutter 9 is opened when the main shaft 3 enters and exits the processing region R for loading and unloading the workpiece W. .

  A wiper 32 formed of an elastic body such as rubber or soft resin or a flexible material is attached to the upper end of the shutter 9. That is, the wiper 32 is supported by the shutter 9 as a wiper support member so as to be movable in a direction approaching and moving away from the moving cover 8. As shown in FIG. 6, the wiper 32 is attached such that its longitudinal direction is inclined with respect to the longitudinal direction of the elongated thin plate member 21 of the movable cover 8. The inclination angle θ of the wiper 32 is preferably less than 45 degrees, for example. Further, the distance in the left-right direction between the longitudinal end points 32a and 32b of the edge of the wiper 32 that contacts the moving cover 8, that is, the distance A in the moving cover moving direction, is larger than the width B of the groove-shaped portion 24 of the moving cover 8. Wide.

  By pressing the wiper 32 against the lower surface of the moving cover 8 that moves, chips and cutting oil adhering to the lower surface of the moving cover 8 are removed. The longitudinal direction of the wiper 32 is inclined with respect to the longitudinal direction of the elongated thin plate member 21 of the moving cover 8, and the length A of the wiper 32 in the moving cover moving direction is greater than the width B of the groove-like portion 24 between the elongated thin plate members 21. Therefore, the wiper 32 does not fit into the groove-like portion 24 between the elongated thin plate members 21. Therefore, rattling of the wiper 32 can be reliably prevented.

  The operation of the machine tool 1 will be described. The spindle 3 is positioned at the machining position P1 and the workpiece W gripped by the spindle chuck 10 is cut with the cutter 4a of the tool post 4. Specifically, the workpiece W is moved in the feed direction and the cutting direction with respect to the blade 4a by moving the spindle 3 to the left and right and moving it up and down while rotating the spindle 3.

  When the cutting process is completed, the spindle 3 moves to the supply / discharge position P2. The moving cover 8 also moves together with the main shaft 3. At that time, while the main shaft 3 is in the processing region R, the shutter 9 is closed, and chips and cutting oil adhering to the lower surface of the moving cover 8 are removed by the wiper 32. When the main shaft 3 has moved to the position of the main shaft passing port 30, the shutter 9 is opened and the main shaft 3 is passed. The spindle 3 stops at the feeding / discharging position P2 and places the processed workpiece W on the table 41 of the workpiece feeding / discharging device 40 and also holds the workpiece W before processing on another table 41. Since the chips and cutting oil on the lower surface of the movable cover 8 are removed by the wiper 32, the chips and cutting oil do not fall on the workpiece supply / discharge device 40 or the workpiece W on the workpiece supply / discharge device 40. The supply / discharge device 40 and the workpiece W are kept clean. Thereafter, the spindle 3 returns to the machining position P1. If the main shaft 3 passes through the main shaft passage port 30, the shutter 9 is closed. Then, cutting is performed in the same manner as described above.

  In the above embodiment, the machine tool is a vertical lathe, but the present invention can also be applied to a lathe other than a vertical lathe or a machine tool other than a lathe.

DESCRIPTION OF SYMBOLS 1 ... Machine tool 2 ... Bed 3 ... Spindle 4 ... Tool post 8 ... Moving cover 9 ... Shutter (wiper support member)
21 ... Elongated thin plate member 24 ... Groove-shaped portion 26 ... Movement guide 32 ... Wiper

Claims (4)

A plurality of elongate thin plate members are arranged in parallel with their longitudinal directions parallel to each other, and adjacent elongate thin plate members are connected to each other so as to be capable of changing the angle. A machine tool cover structure comprising a movement guide for guiding the movement of the cover, and an elongated wiper capable of contacting the plate surface of the elongated thin plate member of the movable cover,
A cover structure for a machine tool, wherein the wiper is provided such that its longitudinal direction is inclined with respect to the longitudinal direction of the elongated thin plate member.   The machine tool cover structure according to claim 1, wherein the wiper is supported by a wiper support member that is movable in a direction approaching and moving away from the moving cover.   The distance in the moving cover moving direction between the longitudinal end points of the wiper is wider than at least a width of a groove-like portion formed between a pair of adjacent thin thin plate members adjacent to the moving cover. The machine tool cover structure described.   The machine tool according to any one of claims 1 to 3, wherein the machine tool is a vertical lathe in which a main spindle facing in a vertical direction grabs and conveys a workpiece, and the moving cover moves together with the main spindle. Machine cover structure.

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