JPH11300573A - Cover fitting structure of machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the increase in weight of a machine tool by sufficiently increasing the rigidity of a part in the vicinity of a cover device in a condition where strengthening of components or necessity of increasing reinforcement members are suppressed even when the moving range of a machining head in the lateral direction is extended. SOLUTION: In a machine tool provided with an upper structural body 6 equipped with a machining head (k) and a guide support base 2 to movably support the upper structural body 6 in a movable manner in the lateral direction (y), a lateral direction guide beam member 13 integratedly fixed to the guide support base 2 is provided in the moving range of the upper structural body 6 in the lateral direction (y), a downward displacement regulation member 16 to regulate the downward displacement of the lateral direction guide beam member 13 while the upper structural body 6 is moved is provided on the same part of the upper structural body 6, and a cover device to form a shut-off wall for a cutting fluid or chips on the lateral direction guide beam member 13 from a longitudinal wall therealong.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cover mounting structure for a machine tool.

[0002]

2. Description of the Related Art An upper structure provided with a processing head,
With a machine tool having a guide support that movably supports the upper structure in a fixed horizontal direction, cutting oil used for processing and chips generated during processing are not scattered in a specific direction. A vertical cover device for forming these blocking walls on a vertical surface in the vicinity of the movement locus of the processing head has been provided.

[0003] In order to prevent the operation stability and the like from being impaired by chips, this type of vertical cover device is disclosed in, for example, Japanese Patent Application Laid-Open No. 05-177499.
It is mounted so as to be hung on a lateral guide beam member provided along the movement trajectory of the processing head.

[0004]

In the conventional cover mounting structure as described above, if the horizontal movement trajectory of the processing head is long, the horizontal guide beam member becomes long and easy to bend, and the cover hung on this. The equipment is similarly long and heavy.

[0005] Therefore, in order to make the cover mounting structure rigid enough, it is necessary to increase the strength of its constituent members and increase the number of reinforcing members, thereby increasing the overall weight. I do.

The present invention provides a cover mounting structure for a machine tool capable of sufficiently increasing the rigidity around the cover device without increasing the weight as much as possible even if the lateral movement trajectory of the processing head becomes long. The purpose is to:

[0007]

In order to achieve the above object, according to the present invention, an upper structure provided with a processing head and a guide support for supporting the upper structure movably in the left-right direction are provided. In the machine tool equipped with, the left and right guide beam members fixed to the guide support and the same body are provided in the left and right movement range of the upper structure, while the upper structure is moved to the same part as the upper structure Medium, a downward displacement regulating member that regulates downward displacement of the left and right guide beam member is provided, and
The left and right guide beam members have a configuration in which a cover device for forming a cut-off wall for cutting fluid or chips is suspended from a vertical surface along the guide beam member.

In the present invention, since the downward displacement restricting member restricts the lateral guide beam from sagging due to gravity during the movement of the processing head, the lateral guide beam is the same as the support interval thereof is reduced. In this state, even if the cross-sectional dimensions are the same, the cover device can be firmly supported against a vertical load.

Further, in order to further increase the rigidity around the cover device, a longitudinal displacement regulating member for regulating the longitudinal displacement of the left-right guide beam member during movement of the upper structure to the same portion as the upper structure. Is provided.

With this arrangement, the left and right guide beam members are in the same state as the support interval for the load in the front-rear direction is shortened. Even if the cross-sectional dimensions are the same, the cover device is not affected by the load in the front-rear direction. Can be more firmly supported.

The downward displacement restricting member is preferably formed by a roller which is brought into contact with the lower surface of the left-right guide beam member and is rotated around a longitudinal axis.
The roller may be formed of a roller which is in contact with the front surface of the left and right guide beam member and is rotated about the vertical axis, and a roller which is in contact with the rear surface of the left and right guide beam member and is rotated about the vertical axis.

The guide support may be supported on a guide track provided on the upper surface of the base so as to be movable in the front-rear direction.

[0013]

FIG. 1 is a view showing a machining center according to an embodiment of the present invention, FIG. 2 is a front view showing a main part of the machining center, FIG. 3 is a plan view showing the main part, and FIG.
5 is a perspective view showing the main part, FIG. 5 is a sectional view showing an x1-x1 part in FIG. 3, and FIG. 6 is a view showing an x2-x2 part in FIG.

In FIG. 1, reference numeral 1 denotes a base, 2 denotes a guide support which is guided by guide tracks 3 and 3 provided on the base 1 and is movable in the front-rear direction x, and 4 denotes a base. Is a work fixing table provided at

A pair of guide tracks 5 as shown in FIG. 4 are provided on the guide support 2, and an upper structure 6 is supported on the guide tracks 5 so as to be movable in the left-right direction y. The upper structure 6 has guide tracks 7, 7 in the vertical direction z on the front surface.
Are provided, and a spindle device 8 is disposed in a front-rear direction at a center portion of the width, and the spindle device 8 is guided by the guide tracks 7, 7 and is moved in the vertical direction z.

Here, the spindle device 8 includes a spindle 9 rotated by a motor (not shown) and a spindle case 10 rotatably supporting the spindle 9, and a guided portion guided by the guide tracks 7, 7 to the case 10. 11 is provided. The front part of the spindle device 8 forms a processing head k.

At each of the left and right ends of the guide support 2 on the side of the machining head k, there are columns 12a and 12b.
b is fixedly provided, and a left-right guide beam member 13 is provided between the upper ends of the columns 12a and 12b.

On the other hand, a bracket 15 is fixed to the front extension of the top plate 14 of the upper structure 6, and the lower side of the bracket 15 restricts the downward displacement of the left-right guide beam member 13. Rollers 16, 16 are provided on the left and right as the lower displacement restricting members. At this time, each roller 16 is rotated around a longitudinal axis, and abuts on the lower surface of the lateral guide beam member 13.

The front projections at the left and right ends of the upper side of the bracket 15 and the central portion of the length of the bracket 15 serve as a longitudinal displacement regulating member for regulating the longitudinal displacement of the lateral guide beam member 13. Rollers 17, 17, 18 are provided.

At this time, the front rollers 17, 17 are rotated around a vertical axis and abut on the front surface of the left-right guide beam member 13, and the rear rollers 18 are vertical like the preceding rollers 17. It is rotated around the direction axis,
It comes into contact with the rear surface of the left and right guide beam member 13.

The right and left beam members 13 positioned as described above are attached to the slide cover devices 191 and 1 shown in FIG.
92 is suspended, and specifically, it is as follows.

That is, as shown in FIG. 4, a pair of vertical support rod members 20a and 20b are disposed in parallel near the left and right of the processing head k, and a lower portion of the support rod members 20a and 20b projects from the front surface of the upper structure 6. It is fixed to the arm 21, and the upper part is fixed to upper protrusions 15 a, 15 a provided on the left and right of the bracket 15.

The right slide cover device 1 is disposed between the right vertical support bar member 20a and the right support 12a.
91, and the left vertical support bar member 20 is provided.
The slide cover device 192 on the left side is provided between the support column 12b and the support 12b on the left side.

The left and right slide cover devices 19 described above.
1 and 192 have a symmetrical structure, so only the right-hand side will be described representatively. This slide cover device 191 has a single base end cover 1 as shown in FIGS.
9a, three intermediate covers 19b, 19c, 19d and one end cover 19e.

Each cover has a front part a, an upper bent part b,
It has a lower bent part c and a right side part d, and does not have a left side part. These covers have a larger size on the right side than on the left side, so that the left side slides to the right and enters the inside of the right side.

The base cover 19a is firmly fixed to the column 12a and the like, and the front cover 19e is bolted to the vertical support rod member 20a. At this time, as shown in FIGS. 5 and 6, a shaft fixing piece 23 supporting a front-rearward shaft 22 is fixed to the upper part of the right side surface portion d of the tip cover 19e. A guide shoe 2 for sandwiching the front and rear surfaces of the beam member 13
4 and 24 are fixed, and a roller 25 that rolls on the upper surface of the left-right guide beam member 13 is supported on the front-rear shaft 22. The roller 25 and the guide shoes 24
9e is configured to position the upper right end.

The innermost intermediate cover 19d is supported and guided by the front end of the upper bent portion b on the upper surface of the upper bent portion b of the front cover 19e, and the rear end of the upper bent portion b is supported by the front cover 19e. In addition to being supported and guided by the roller 25 and the guide shoe 24 mounted in accordance with the above, there is provided a not-shown restricting means for restricting the slide-off to the right from the tip cover 19e.

Each of the intermediate covers 19b and 19c other than the intermediate cover 19d is supported and guided at the front end of the upper bent portion b on the upper surface of the upper bent portion b of the intermediate covers 19c and 19d located inside the upper portion. The rear end of the upper bent portion b is supported and guided by the roller 25 and the guide shoe 24 mounted according to the intermediate cover 19e, and the intermediate cover 19d.
When sliding to the right similarly to the above, the intermediate cover 19c, 1
It is provided with a regulating means (not shown) for regulating the escape from 9d.

The base cover 19a has an intermediate cover 19 as well.
It is provided with a regulating means (not shown) for regulating that b slides out to the right when it slides rightward. As a result, the slide cover device 191 is in a state of being suspended from the left-right guide beam member 13.
Since the lower portions of 9b, 19c and 19d are displaced back and forth, a guide means 26 for regulating the displacement is provided below the left and right guide beam members 13.

The guide means 26 is specifically configured as follows. That is, as shown in FIG. 4, two plate members 28a and 28b are fixed to the guide support 2 via the support piece 27, and a left and right guide groove m is formed between the plate members 28a and 28b. .

On the other hand, as shown in FIGS. 2 and 3, a rearward projecting member 29 is fixed to the lower portion of the right side portion d of the front cover 19e and each of the intermediate covers 19b, 19c, 19d. The roller 30 rotated around the vertical axis is fitted into the guide groove m.

The left and right vertical support rod members 20a, 2a
Cover devices 31a and 31b are provided on each of the upper and lower sides of the processing head k between 0a when the processing head k moves in the vertical direction z.

Next, the overall operation of the product of this embodiment configured as described above will be described. When cutting the work fixed on the work fixing table 4, the main shaft 9 is rotated, and if necessary, the guide support 2 is guided in the guide tracks 3, 3 to operate in the front-rear direction x, and the upper structure The body 6 is guided by the guide track 5 and is operated in the left-right direction y, and the spindle device 8 is guided by the guide tracks 7 and 7 and is operated in the vertical direction z. Thereby, the workpiece is cut into a predetermined shape by the cutting tool fixed to the main shaft 9.

In such cutting, when the upper structure 6 is moved rightward, the left slide cover device 19 is moved.
In FIG. 2, the front cover 19e is pulled rightward via the vertical support rod member 20b, and each cover 19b, 19c, 1
9d and 19e are pulled out from the inside of the cover on the left side, and the total length in the left-right direction is extended.

On the other hand, in the right slide cover device 191, the distal end cover 19e is pressed rightward via the vertical support rod member 20a, and the respective covers 19b, 19c, 19
d and 19e are pushed into the cover on the right side, and the total length in the left-right direction is reduced.

Contrary to the above, when the upper structure 6 is moved leftward, the slide cover devices 191 and 19 on the left and right sides, respectively.
2 operate symmetrically to the above, the total length in the left-right direction of the right slide cover device 191 is extended, and the total length in the left-right direction of the left slide cover device 192 is reduced.

Therefore, even if the upper structure 6 moves to any position in the left-right direction y, the cutting group of the slide cover devices 191 and 192 forms cutting fluid and chips on the vertical surface near the movement locus of the processing head k. The cut-off wall is formed, and the chips generated by the processing head k and the cutting fluid supplied to the processing head k are not scattered backward by the slide cover devices 191 and 192.

The above-mentioned slide cover devices 191 and 19
2, the front cover 19e and the intermediate cover 19
b, 19c and 19d are the weights of the rollers 2
5 acts on the left-right guide beam member 13, and the load of each cover in the front-rear direction x acts on the left-right guide beam member 13 via the guide shoe 24.

However, regardless of the position of the upper structure 6, the left and right guide beam members 13 correspond to the movement position of the upper structure 6 by rollers 16, 17, and 18 which are the same as the upper structure 6. Since the position is determined, the supporting interval is narrowed against the vertical load and the front-rear direction load, and the supporting gap is hardly deformed.
The stiffness of the 92 peripheral structures is greatly increased.

This increasing effect is most remarkable when the upper structure 6 is located near the center of the length of the left-right guide beam member 13, which means that the upper structure 6 has the right-left guide beam member 1.
This is particularly beneficial for machining centers that are often used near the center of the length of three.

[0041]

According to the present invention constructed as described above, even if the moving range of the processing head in the left-right direction is increased, the necessity of increasing the strength of the constituent members and increasing the number of reinforcing members is suppressed. In addition, the rigidity around the cover device can be sufficiently increased, thereby suppressing the increase in the weight of the machine tool and the vibration around the cover device, and the smooth operation of the cover device and the rapid displacement of the machining head. It becomes possible and efficient processing can be performed.

According to the second aspect, the rigidity around the cover device can be more effectively increased.

According to the third aspect, the left-right beam member is securely supported, and the left-right movement of the upper structure is smoothly performed.

According to the fourth aspect, the processing head is moved in the front-rear direction, and in this case, the same effect as described above can be obtained.

[Brief description of the drawings]

FIG. 1 is a diagram showing a machining center according to an embodiment of the present invention.

FIG. 2 is a front view showing a main part of the machining center.

FIG. 3 is a plan view showing the main part.

FIG. 4 is a perspective view showing the main part.

FIG. 5 is a sectional view showing an x1-x1 part of FIG. 3;

FIG. 6 is a diagram showing an x2-x2 part of FIG. 5;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 base 2 guide support 3 guide track 6 upper structure 13 left-right guide beam member 16 roller (downward displacement restricting member) 17, 18 roller (front-rearward displacement restricting member) 191 cover device 192 cover device k processing head x front-back direction y left and right direction

Claims (4)

[Claims] An upper structure provided with a processing head,
In a machine tool provided with a guide support that movably supports the upper structure in the left-right direction, a left-right guide beam fixed to the guide support and the same body is provided in a range in which the upper structure moves in the left-right direction. On the other hand, a lower displacement restricting member is provided at the same portion of the upper structure as the lower structure, which restricts the downward displacement of the left-right guide beam member during the movement of the upper structure. A cover mounting structure for a machine tool, wherein a cover device for forming a cut-off wall for cutting fluid and chips is hung on a vertical surface along the axis. 2. A front-rear displacement restricting member for restricting a front-rear displacement of a left-right guide beam member during the movement of the upper structure is provided at the same portion as the upper structure. The cover mounting structure of the machine tool described. 3. A lower displacement restricting member is a roller which is brought into contact with a lower surface of the left-right guide beam member and is rotated around a front-rear axis. 3. The roller according to claim 2, further comprising a roller abutted and rotated about a vertical axis, and a roller abutted on a rear surface of the left and right guide beam member and rotated about the vertical axis.
The cover mounting structure of the machine tool described. 4. The cover mounting structure for a machine tool according to claim 1, wherein the guide support is supported by a guide track provided on an upper surface of the base so as to be movable in the front-rear direction. .