JP2003062738A - Machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cover set which prevents machining accuracy for workpiece from deterioration caused by accumulation of hot cutting chips on exposed machine surfaces such as the headstock, toolpost or the like. SOLUTION: Work holding parts 8 and 10 and a cutting tool T which are concerned in cutting processes are protruded in the machining area in which cutting chips are produced, and the machining area is covered with side covers 21 and 22 and a top cover 25 in order to eliminate exposed flat surfaces and restrict splashing range of cutting chips. The side covers and the top cover are fixed on supporting parts near the work holding parts and the tool, and the cutting chips dropped in an opening area below the machining area are conveyed with a chip conveyor 6 out of the machine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover for preventing high temperature chips discharged during cutting of a machine tool from being deposited on a machine component.

[0002]

2. Description of the Related Art A tool post to which a tool of a machine tool is attached is
Since all or part of the turret body is exposed in the processing area and it is the closest structure where chips are generated, avoid gradually accumulating chips on the top surface during cutting. I can't. Further, chips are accumulated around the joint between the tool rest and the cover. In order to prevent the accumulated chips from accumulating inside the machine, place a conveyor for chip discharge below the position where chips are generated so that chips can be discharged outside the machine. Has been done. However, the generation state of chips is not uniform, and the chips are scattered with great force from the position where the chips are generated. The scattered chips are accumulated on the exposed upper surfaces of all the members constituting the machine around the processing. When hot chips accumulate on the bed and turret,
The bed is thermally deformed, and the tool rest body is thermally deformed to move the blade edge, which affects the machining accuracy of the workpiece.

FIG. 5 shows a conventional lathe machined part with a ceiling cover a.
FIG. 3 is a perspective view of a processing center portion with a part of the front cover b omitted. The machining center is composed of a headstock c, a saddle d, a tool rest e, a tailstock f, a side cover g on the spindle side, a back cover h, and a telescopic lower surface cover k. The chips generated by the processing slide down on the telescopic lower surface cover that is provided by being inclined, and the chips accumulated on a chip discharging means (not shown), such as a screw type chip conveyor, are carried out of the machine by a conveyor.

In the lathe shown in FIG. 5, the machining area in which chips are generated includes the protrusion of the headstock c, the saddle d, the tool rest e, and the like. Since the chips are scattered all over the processing area, the chips accumulated on the exposed upper surface have to be removed manually. Especially, if the cutting process is continued for a long period of time, scattered chips easily accumulate on the upper surface of the tool rest e.

FIG. 6 is an explanatory view of a machine tool (for example, a vertical lathe) equipped with a turret type tool stand which can be indexed around a horizontal axis. In FIG. 5, a turret type tool base 101 is provided on a support base 102, and a main shaft 104 (C axis) for positioning in the vertical direction (Z axis) is provided on a saddle 103 for positioning in the horizontal direction (X axis). ing. Chuck 1
The workpiece 106 gripped by 05 is processed by the turning tool 107 prepared on the turret type tool base 101 by controlling the rotation angle (C axis) of the spindle 104, the saddle 103 (X axis) and the spindle (Z axis). Is done.

The processing area for producing chips is the area surrounded by the chain double-dashed line, and the produced chips 109 are also deposited on the upper surface of the cover 108 provided on the support base 102 which is a member constituting the machine. If there is an exposed upper surface in the processing area, the chips are accumulated even if the surface is located higher than the position where the chips are generated.

[0007]

As described in the prior art, in the case of the lathe shown in FIG. 5, the machining area where chips are produced is the side cover g on the spindle side, the back cover h, the telescopic bottom cover k and the front cover. It is a space surrounded by b (opening door) and the ceiling cover a, and high-temperature chips are freely scattered in this space. Accumulation of cutting chips on the exposed upper surface of the tool post, which is a major machine component that affects machining accuracy, causes the tool post body to expand due to the heat of the cutting chips and the cutting edge to move, reducing the work finishing accuracy. The problem of doing. The telescopic lower surface cover k prevents the temperature of chips from falling onto the sliding surface of the saddle or tailstock and raises the temperature. However, if the inclination of the lower surface cover is insufficient for the chips to fall, it is processed. This raises the problem of raising the temperature of the entire region and affecting the processing quality.

In the case of the vertical lathe shown in FIG. 6, the processing area for producing chips is the range shown by the chain double-dashed line. The upper surface of the support base of the turret type tool base 101 is exposed, and if chips are accumulated, the influence on accuracy is significant.
In order to avoid this, it is conceivable to provide the cover 108 so that the cutting chips do not directly accumulate on the upper surface of the support table. Even in this case, the cutting chips may slide down on the turret tool table and are affected by heat. Cause There is a problem that the chips accumulated on the upper surface and the periphery of the headstock and the tool rest and on the joint portion between these units and the cover need to be removed every time a predetermined number of machining operations are completed, which is troublesome. Further, since cutting water is applied to the upper surfaces of these in addition to the accumulation of cutting chips, there is a problem in that accuracy varies due to the effect of expansion and contraction due to the temperature of the cutting water. In addition, as a result of the cutting water constantly being applied to the headstock and the tool rest, there is a problem that a failure due to the intrusion of cutting water into these parts occurs.

The present invention has been made in view of the above problems of the prior art, and its purpose is to prevent the accumulation of chips on the exposed upper surface of the machine component in the processing region where chips are generated. Configure a cover that surrounds the processing area so that only the member of the processing area projects into the processing area, and open the lower surface of the processing area to remove the falling chips from below the processing area to the outside of the machine. (EN) Provided is a machine tool in which a cover capable of eliminating the influence of heat of cutting chips on a member involved in processing within a processing region is provided in the processing region.

[0010]

In order to achieve the above object, the invention as set forth in claim 1 is provided with a cover for blocking scattering of cutting chips from a processing region where chips are generated to an outer non-processing region. In the machine tool, a workpiece gripping member and a tool involved in cutting work are projected into the processing area so that the fixed upper surface of the machine component is not exposed in the processing area and the scattering area of the chips is limited. As described above, including a side cover configured to surround the processing area, and a chip discharging means provided in an opening below the processing area to carry the chips out of the machine from the processing area. is there.

According to the first aspect of the present invention, the processing area is formed by opening the lower surface and enclosing the side surface with the cover to generate chips. When machining a work piece, only the part that grips and rotates the work piece and the tool project from the side cover into the machining area, and the exposed upper surface where the generated chips are accumulated cannot be formed. The heat of the chips is not transferred onto the constituent members. The chips that have fallen to the open lower surface are carried out of the machine by the chip conveyor below, so the influence of heat from high-heat chips is reduced, and the influence of heat on the spindle, tool post, tailstock, and frame is extremely high. Since the amount is reduced, it becomes easy to maintain the machining accuracy of the machine.

Further, according to a second aspect of the present invention, a spindle head or an upper cutting tool provided so that the machine tool can be moved and positioned in the vertical Z-axis direction on a saddle that can be moved and positioned in the horizontal X-axis direction at a higher position. Horizontal X on the table and below the saddle
It is configured to be capable of working with a horizontal tool rest or a headstock provided in the axial direction.

According to the invention of claim 2, the saddle has a horizontal X
It is axially moved and positioned so that the tool or spindle provided on the saddle can be moved and positioned in the vertical Z-axis direction, and either the tool or the spindle is fixed to the machine frame at the lower position of the saddle parallel to the X-axis. In a machine tool configured to be provided with a workpiece and capable of performing a working operation, a work region for limiting the scattering of chips is formed by surrounding a work holding member and a tool with a side cover configured to project into the working region. . The generated chips fall into the open lower space and are carried out of the machine by the chip discharging means.

Further, in the invention of claim 3, the side cover includes a first side cover fixed to the headstock or the horizontal tool rest provided at a lower position of the saddle. A facing cover provided to face the first side cover, a back cover fixed to the back surface of the processing area, and a front cover, and the work gripping part of the spindle head or the upper tool rest is An upper surface cover fixed to the lower surface of the saddle so as to project into the processing area to form an upper surface of the processing area and prevent the chips from scattering upward.

According to the invention of claim 3, the first side cover provided on the headstock or the horizontal tool rest fixed to the lower position of the four kinds of side covers, that is, the saddle. A processing area is formed by surrounding a second side cover (opposed cover in the case of a tailstock) provided opposite to the first side cover, a rear cover, a front cover and an upper cover that horizontally moves integrally with the saddle. Limits the scattering area of chips. The swarf discharging means carries out the swarf from the non-processing area to the outside of the machine.

Further, in the invention of claim 4, the facing cover is a second side cover fixed to a tailstock provided facing the headstock provided at a lower position. According to the invention of claim 4, in the machine tool having a structure in which the tailstock is provided so as to face the headstock, the rotating parts of the headstock and the tailstock which face each other are covered by respective covers. The accumulation of chips is eliminated by projecting into the processing area. The first side surface cover fixed to the headstock and the second side surface cover fixed to the tailstock constitute two surfaces of the side surface cover to form a processing region.

According to a fifth aspect of the present invention, there is provided a machine tool provided with a turret tool base that swivels about a horizontal axis.
An auxiliary cover is attached to one surface of a side cover formed so as to surround a processing area where chips are generated during processing of a workpiece and which holds a sealing member which is annularly attached to and abuts on the cylindrical outer peripheral surface of the turret.

According to the fifth aspect of the present invention, when the work is cut by the tool mounted on the turret type tool base which can be indexed about the horizontal axis, the chips are accumulated on the supporting member of the turret tool base. Even if the side cover is provided so as to cut off the turret tool base and its supporting member, high-temperature chips are accumulated on the turret tool base until the turret tool base turns and the next tool is indexed. Therefore, an auxiliary cover is provided with a ring-shaped seal groove for storing a seal so that the seal material is annularly attached and abutted at a position where the amount of protrusion of the outer peripheral surface of the disk-shaped main body of the turret tool table is reduced. Since the above is fixed to the side cover or the supporting member of the turret type tool stand, it is possible to eliminate the accumulation of chips on the turret tool stand. Furthermore, if a cover made of a material having heat resistance and low thermal conductivity is attached to the upper surface of the tool holder, the heat blocking effect becomes good. As a result, the chances of the generated chips coming into contact with or accumulating on the turret tool stand to be thermally conducted are reduced, and the position of the tool cutting edge is eliminated, so that the accuracy of finishing the work can be maintained.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. [Embodiment 1] FIG. 1 shows a machine tool in which a machining area is formed by being surrounded by a side cover and a top cover, and a machining area surrounded by a first side cover, a second side cover and a top cover, and an outside thereof. FIG. 2 is a front explanatory view showing a non-machining region, and FIG. 2 is a right side explanatory view showing a machining region surrounded by a front cover and a back cover and a top cover in the machine tool shown in FIG. 1 and a non-machining region outside thereof. Is.

First, the main structure of the machine tool of the first embodiment will be described. The machine frame 1 shown in FIG. 1 is provided with a headstock 2 on the left side and a tailstock 3 on the right side, a saddle 4 at the upper position of the frame, and a tool magazine 5 behind the headstock 2. The chip conveyor 6 shown in FIG. 2 is a chip discharging means that carries chips out of the machine from a lower position of the frame. The processing area in the first embodiment is a space surrounded by the first side cover 21, the second side cover 22, the front cover 23, the back cover 24, and the top cover 25 in FIGS. The side cover is a general term for the first side cover 21, the second side cover 22, the front cover 23, and the rear cover 24. The non-machining area is a space on the machine that includes the headstock 2, tailstock 3, saddle 4, tool magazine 5 and the like provided on the machine outside the machining area. From the above point of view, another cover is provided.

In FIG. 1, a headstock 2 is fixed to a headstock mounting surface 1a of a machine frame 1. The first side cover 21 is fixed to the non-rotating main spindle head portion 1b, and the main shaft 7 penetrates from the hole formed in the first side cover 21 to the processing area.
A chuck 8 is attached to the tip of the main shaft. A seal material (not shown) is provided in the gap between the main shaft 7 and the first side cover 21 so that cutting fluid and cutting chips do not pass therethrough.

The work W is supported on the same axis as the main shaft 7 by the tip of a center 10 which is gripped by a chuck 8 on the outer peripheral portion by a claw and mounted on a tailstock shaft 9. The tailstock 3 is fixed to the tailstock mounting surface 1c of the machine frame 1 in a horizontal position. The second side cover 22 is the chuck 8
Is fixed to the end face of the tailstock 3 facing the. In the case of a chuck work dedicated machine using a horizontal spindle, since the tailstock is not provided, the second side cover 22 is a flat cover and may be fixed to the machine frame 1 or integrally to the upper cover 25. it can.

When the tailstock 3 is provided and the center work is machined, the second side cover 22 is provided with a hole for penetrating the center 10 into the machining area. In addition,
A seal material (not shown) is provided in the gap between the tailstock shaft 9 and the hole so that cutting fluid and chips do not pass therethrough. The upper edge portions of the first side surface cover 21 and the second side surface cover 22 are in contact with the lower surface of the upper surface cover 25. These side surface covers are fixed, but the upper surface cover 25 can move in the horizontal direction. , The first side cover 21 and the second side cover 22
A sealing material (not shown) is provided at the upper end of the to prevent cutting oil and chips from scattering.

A horizontal guide 1d projecting from the front surface of the main frame 1 is provided at an upper position of the main frame 1, and is guided by the pair of parallel horizontal guides 1d and rotated by a servo motor (not shown). A saddle 4 is provided, which is moved and positioned in the horizontal X-axis direction by a feed shaft 11 that is provided. Further, the tool base 13 is moved and positioned by the feed shaft 12 in the vertical Z-axis direction along the vertical guide formed on the saddle 4. The tool T is fixed to the tool holder 14 attached to this tool base. The upper surface cover 25 in the processing region is attached below the saddle 4 and can move in the horizontal direction together with the saddle 4. The feed amount by the horizontal movement of the saddle and the cutting amount by the vertical movement of the tool base 13 are given by a servo motor (not shown) driven by the NC device.

In FIG. 2, the front cover 23 is established on the front surface of the frame 1 and opens in one direction (not shown).
Both doors may be opened and doors opened upward may be provided. A back cover 24 is provided on the back side of the machine frame 1 so as to face the front cover 23. As the back cover 24, a part of the wall surface 1e of the frame of the main body may be used, but even if the back cover 24 is provided independently in relation to the horizontal movement of the top cover 25, a side cover may be formed. good. By constructing the side covers (21, 22, 23, 24) and the top cover (25) so as to surround the processing area as described above, even if the length or diameter of the work W is changed, the processing area is maintained during the processing. Is made as narrow as possible to limit the scattering area of the chips and prevent the statically exposed part where the chips accumulate from being inside the processing area, so the influence of the heat of the chips on the machine components involved in the processing is small. .

Below the processing area is an open space.
The chips generated during processing immediately fall onto the chip conveyor 6 provided on the flat plate 16 below. Since the chip conveyor 6 rotates at a constant speed during cutting, the chips are carried out to the outside non-machined area and loaded into the bucket 17. The cutting fluid is collected from the flat plate 16 into a cutting fluid tank (not shown) and is circulated. Second side surface cover 22 that constitutes the processing area
Is changed as the position of the tailstock 3 is set according to the size of the work W. When changing the position of the second side cover 22, the upper surface cover 25 fixed to the lower end of the saddle 4 can be horizontally moved at a constant height position without any trouble. In a machine with an automatic tool changer (not shown), when changing the tool T to a new tool, a part of the first side cover 21 is configured to be openable / closable only when the tool is changed, and the tool magazine 5
The tool can be changed by horizontally moving the saddle 4 to the vicinity of.

The operation of forming the processed region as in the first embodiment will be described below. As described above, in the processing area formed by the side cover and the top cover, the work W
Since both the main shaft 7 and the chuck 8 that hold the tool are rotating during cutting, there is no stationary upper surface. In addition, the tool holder 14 of the tool base 13 that has a tool supporting member in the upper position and hangs down.
The tool T moves in the horizontal direction and the vertical direction, but no gap is formed in the tool holder 14 and the tool base 13 for accumulating chips. Even if the tool holder is provided with a swivel function, it is possible to configure it so that there is no gap. In addition, the gap between the covers forming the processing area can prevent the accumulation of cutting chips and the scattering of cutting fluid outside the processing area by using the sealing material. It is possible to prevent adverse effects.

[Embodiment 2] FIG. 3 shows a vertical machining area formed by using an auxiliary cover mounted on a turret type tool base having a cylindrical turret outer surface capable of indexing a tool around a horizontal axis as one surface of a side cover. It is a front explanatory view of a shape lathe. Figure 4
FIG. 4 is a partially enlarged view of the auxiliary cover with an annular seal in FIG. 3.

In FIG. 3, 2 is provided at a higher position of the main unit frame 26 so as to project from the front surface of the main unit frame 26.
On a saddle 27 that is moved and positioned in the horizontal X-axis direction by a control motor and a feed screw (not shown) in the set of guides 26c,
The spindle head 28 is provided so as to be movable and positioned in the vertical Z-axis direction, and the spindle head 28 is provided with a rotatable and C-axis controllable spindle 29. A chuck 32 for holding the work W is attached to the lower end of the spindle 29.

At the lower position of the saddle 27, there is provided a tool base body 30 capable of turning around a horizontal axis and indexing a tool. A tool holder 33 for holding a tool T is provided on a cylindrical end surface of a turret 31 supported by the tool base body 30 so as to be pivotally indexable. The side surface cover 35 that constitutes the machining area is provided near the cylindrical end surface of the turret 31, and the tool holder 33 and the tool T are projected into the machining area to extend the cylindrical outer peripheral surface of the turret 31 into the machining area. The exposure is kept as low as possible.

In FIGS. 3 and 4, an auxiliary cover 36, which is mounted on a smooth outer peripheral surface of the turret 31 having an outer peripheral cylindrical shape near the tool holder 33 and holds a sealing material such as an O-ring 34, is attached with a screw 37. The side cover 35. In this embodiment, the auxiliary cover 3 with an annular seal
The side cover 35 provided with 6 and the facing cover 38, and a back cover (not shown), a front cover, and a top cover 39, which are provided in parallel with the paper surface of FIG.
The auxiliary cover 33 can be attached to any of the first side surface cover, the second side surface cover, and the upper surface cover of the first embodiment, if necessary.

Since the lower part of the processing area is open, the chips that have fallen are collected in the bucket 41 by the chip conveyor 40. The top cover 39 may be a plate-shaped cover, a telescopic cover or a bellows type cover. FIG. 3 of the second embodiment illustrates a usage example of the bellows type cover.

In the processing region of this embodiment, the generated chips are deposited on the tool holder 33, the tool T and a part of the upper surface of the cylindrical outer periphery of the turret 31. The chips accumulated every turning of the turret 31 fall, so that the chips do not accumulate. By designing the shape of the tool holder 33 so that the exposed surface of the upper surface of the tool holder 33 is small, the amount of heat transferred by the accumulated chips can be reduced. In addition, the tool holder 33
The effect of heat can be further suppressed by covering the upper surface of the substrate with a heat insulating cover 42 made of a material having a low thermal conductivity, such as a heat-resistant and non-combustible resin material or a ceramic material, and fixing it with screws 43.

[0034]

As described above, the machine tool of the present invention is configured such that the machining area for producing chips is set in the vicinity of the components involved in cutting and is surrounded by the side cover and the top cover, and the machining area is generated. Since the falling chips are carried out of the machine by a chip conveyor inserted in the lower opening, a cover was constructed in the vicinity of the chips generation to suppress thermal expansion of the components involved in processing in the processing area. The following effects are achieved.

The invention according to claim 1 has a simple shape.
An exposed flat surface in which chips are generated in the processing area surrounded by the side cover with the side cover and the top cover of the seed, and the chips are highly likely to be accumulated on the supporting members of the constituent members involved in the processing in the processing area. By making it extremely small, it is possible to suppress the thermal expansion of the machine component member due to the heat of the chips.

According to a second aspect of the present invention, a spindle head (or an upper tool rest) is provided in which an X-axis is positioned by horizontal movement of a saddle provided at an upper position and Z-axis positioning is possible by vertical movement on the saddle. ) And a lower tool rest (or headstock) provided at the lower position, the machine tool has a side cover to limit the area where chips are produced by the spindle and tools nearby such as tools involved in machining. This has the effect of reducing the influence of the heat of the chips by carrying out the chips that have fallen out of the machine on the chip conveyor.

According to the third aspect of the invention, the upper head is provided on the head (or upper tool rest) of the saddle provided at the upper position, and the first side surface cover is provided on the lower tool rest (or headstock) provided at the lower position. Is added to this with a back cover, a front cover, and a facing cover to form a surrounding processing area. The facing cover on the side opposite to the first side cover is not a special shape, and may be a simple cover, the lower side of the processing area is open, and the chips are carried out by the chip conveyor from there. Since the fixed flat surface is not exposed at the part protruding from the cover in the machining area of the spindle head or the headstock and the tool rest, which are the main elements involved in machining, it contributes to machining without the accumulation of chips. This has the effect of reducing the thermal expansion of the members in the vicinity of that, and can suppress thermal deformation.

According to a fourth aspect of the present invention, regarding a member in the vicinity of processing, the upper cover is provided on the tool rest of the saddle provided at the upper position, the first side cover is provided on the headstock provided at the lower position, and the spindle is provided. A back cover and a front cover are added to and surrounded by a machine tool having a tailstock provided to face the base and provided with a second side cover to form a side cover to form a processing region. As a result, even in a machine tool having such a configuration, it has an effect of preventing thermal expansion of nearby members due to accumulation of chips.

According to a fifth aspect of the present invention, when a work is machined with a tool fixed to a turret tool base that rotates about a horizontal axis, the side surface cover forming the processing area has a seal on the first side surface cover. By mounting the auxiliary cover on the outer circumference of the turret, the scattering area of the chips is limited to the processing area, and the accumulation of the chips on the exposed upper surface is prevented. As a result, the generated chips are dropped onto the lower chip conveyor and immediately carried out of the machine, which has the effect of preventing a reduction in the machining accuracy of the work due to the heat of the chips.

[Brief description of drawings]

FIG. 1 is a machine tool in which a machining area surrounded by a side cover and an upper surface cover is formed according to a first embodiment, and a machining area surrounded by a first side surface cover, a second side surface cover, and an upper surface cover and an outer side of the processing area; It is a front explanatory view showing a non-processing area.

FIG. 2 is a machine tool in which a machining area is formed by being surrounded by a side cover and a top cover according to the first embodiment, and a machining area surrounded by a front cover and a back cover that are side covers and an upper cover, and the outside thereof. FIG. 5 is a right side explanatory view showing a non-processed region of FIG.

FIG. 3 is a front view of a vertical lathe according to a second embodiment in which a machining area is formed by providing an auxiliary cover with an annular seal on a side cover of a turret type tool table having a cylindrical outer peripheral surface for indexing a tool around a horizontal axis. FIG.

4 is a partially enlarged view of the auxiliary cover with an annular seal in FIG.

FIG. 5 is a perspective explanatory view of a processing center portion of a conventional lathe, in which a processing portion where chips are scattered is viewed with a part of an upper cover and a front cover omitted.

FIG. 6 is a front explanatory view of a conventional vertical lathe.

[Explanation of symbols]

1,26 This machine frame 2 Headstock 3 Tailstock 4,27 saddle 5 tool magazine 6,40 chip conveyor 7,29 Spindle 8,32 Chuck 9 Tailstock axis 10 Center 11,12 Feed axis 13 Tool stand 14,33 Tool holder 16 flat plates 17,41 buckets 19,28 Spindle head 21 first side cover 22 second side cover 23 Front cover 24 Back cover 25,39 Top cover 30 Tool base body 31 Turret 34 O-ring 35 Side cover 36 Auxiliary cover 38 Face-to-face cover 42 Heat-proof cover W work T tool

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Michio Matsubara             5-25 Shimokoguchi, Oguchi Town, Niwa District, Aichi Prefecture             1 Within Okuma Corporation (72) Inventor Tomoyuki Masuda             5-25 Shimokoguchi, Oguchi Town, Niwa District, Aichi Prefecture             1 Within Okuma Corporation (72) Inventor Ken Itaya             5-25 Shimokoguchi, Oguchi Town, Niwa District, Aichi Prefecture             1 Within Okuma Corporation (72) Inventor Naoki Hattori             5-25 Shimokoguchi, Oguchi Town, Niwa District, Aichi Prefecture             1 Within Okuma Corporation (72) Inventor Hiroshi Tsuge             5-25 Shimokoguchi, Oguchi Town, Niwa District, Aichi Prefecture             1 Within Okuma Corporation (72) Inventor Masahiro Hayashi             5-25 Shimokoguchi, Oguchi Town, Niwa District, Aichi Prefecture             1 Within Okuma Corporation (72) Inventor Riki Ninomiya             5-25 Shimokoguchi, Oguchi Town, Niwa District, Aichi Prefecture             1 Within Okuma Corporation F-term (reference) 3C011 DD03

Claims (5)

[Claims] 1. A machine tool provided with a cover for blocking scattering of chips from a machining region where chips are produced to an outside non-machining region, wherein a workpiece gripping member and a tool involved in cutting are provided in the machining. A side cover formed by surrounding the processing area so that the fixed upper surface of the machine component is not exposed in the processing area and limits the scattering area of the chips, and the processing area is exposed to the outside of the machine. A machine tool, comprising: a chip discharging means provided in an opening below the processing area to carry out the chips. 2. A spindle head or an upper tool rest provided so that the machine tool can be moved and positioned in the vertical Z-axis direction on a saddle that can be moved and positioned in the horizontal X-axis direction at an upper position, and a lower position of the saddle. The machine tool according to claim 1, wherein the machine tool is configured to be machined with a horizontal tool rest or a headstock provided in the horizontal X-axis direction. 3. The side surface cover is provided to face the first side surface cover, which is fixed to the headstock or the horizontal tool rest provided at a lower position of the saddle, and the first side surface cover. A facing cover, a back cover fixed to the back surface of the processing area, and a front cover, and the work gripping part of the spindle head or the upper tool rest is projected into the processing area so that the upper surface of the processing area is The machine tool according to claim 2, further comprising an upper surface cover fixed to a lower surface of the saddle so as to form the upper surface to prevent the chips from being scattered upward. 4. The machine tool according to claim 3, wherein the facing cover is a second side cover fixed to a tailstock provided at a lower position so as to face the headstock. 5. A machine tool provided with a turret tool base that swivels about a horizontal axis, wherein a cylindrical outer peripheral surface of a turret is attached to one surface of a side cover formed so as to surround a processing region where chips are generated during processing of a workpiece. Machine tool provided with an auxiliary cover for holding a sealing member that is abutted against.