Machine tool
a technology of machine tools and tools, applied in the field of machine tools, can solve the problems of destabilization of the support structure, the inability to precisely machining the workpiece w, etc., and achieve the effects of reducing manufacturing costs, facilitating maintenance, and stable support of the tool changer
Inactive Publication Date: 2007-03-15
DMG MORI CO LTD
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- Abstract
- Description
- Claims
- Application Information
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Benefits of technology
[0011] It is an object of the present invention, brought about taking the above-described circumstances into consideration, to provide a machine tool making it possible to perform precisionmachining, perform the maintenance easily, cut down on the cost of manufacturing, and support the tool changer stably. In order to achieve the above object, the present invention provides a machine tool comprising: a bed including a base portion and two side walls standing on both sides of the base portion and opposed to each other with a distance therebetween; a first saddle formed of a rectangular frame member having vertical sides located in parallel with a perpendicular first axis and transverse sides located in parallel with a horizontal second axis, both end portions of which in the horizontal direction being supported on rear faces of the side walls of the bed so as to be movable in the direction of the first axis; a second saddle having an upper portion and a lower portion supported by the first saddle and located movable in the direction of the second axis; a spindle head located within the first saddle and supported by the second saddle such that the spindle head is movable in a direction of a third axis that is perpendicular to the first axis and second axis; a spindle for retaining a tool having an axis line in parallel with the third axis and supported by the spindle head rotatable around the axis line; a table located on the bed for placing a work thereon; a first guide mechanism for guiding the travel of the first saddle in the direction of the first axis; a second guide mechanism for guiding the travel of the second saddle in the direction of the second axis; a third guide mechanism for guiding the travel of the spindle head in the direction of the third axis; a first feed mechanism for moving the first saddle in the direction of the first axis; a second feed mechanism for moving the second saddle in the direction of the second axis; a third feed mechanism for moving the spindle head in the direction of the third axis; and a rotary drive mechanism for rotating the spindle around the axis line.
[0012] According to this invention, since the first saddle is formed of a rectangular frame member in which the spindle head is located, i.e., structures for supporting the saddle and the spindle head that protrude toward front face are omitted unlike the conventional machine tools, it is possible to prevent the bed, the first saddle, the second saddle, and the spindle head from being deformed (deflexed), thereby highly precisely processing works.
[0013] Furthermore, since the first saddle is supported by the rear faces of the side walls of the bed, it is possible to prevent the first guide mechanism and first feed mechanism from facing the work area where works are processed, and to separate the second guide mechanism, the second feed mechanism, the third guide mechanism and the third feed mechanism from the work area. Consequently, it is unlikely that chips would intrude into the first guide mechanism, the first feed mechanism, the second guide mechanism, the second feed mechanism, the third guide mechanism, and the third feed mechanism. As a result, it is possible to simplify the structures of the covers that prevent the chips from intruding into the chip, thereby cutting down on the cost of manufacturing and making it easy to maintain the cover.
Problems solved by technology
However, a problem with the conventional machine tool 100 has been that with the saddle 104 being supported on the front face of the column 103 and the spindle head 105 being supported on the front face of the saddle 104, the saddle 104 and spindle head 105 jut out toward the front face of the machine tool 100, on account of which deflection or similar deformation occurs in the column 103, the saddle 104, and the spindle head 105, which is prohibitive of precision-machining the workpiece W precisely.
A problem with this situation has been that while the tool magazine and the exchange mechanism, jutting out toward the tip of the spindle 106, have to be supported by suitable support members, because the tip of the spindle 106 and the column 103 are separated in the Z-axis direction the support structure is destabilized.
Method used
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Embodiment Construction
[0028] A description will be made on an embodiment of the present invention with reference to the accompanying drawings.
[0029] As shown in FIG. 1 through FIG. 3, a machine tool 1 in this embodiment comprises a bed 11, a first saddle 16 placed on the bed 11 so as to be movable in a vertical direction (in the direction of the Y-axis), a second saddle 17 placed on the first saddle 16 so as to be movable in a transverse direction (the X-axis direction) in a horizontal plane, a spindle head 18 placed on the second saddle 17 so as to be movable in a back and forth direction (in the direction of the Z-axis) in a horizontal plane, a spindle 19 for retaining a tool T that is supported by the spindle head 18 so as to be rotatable around the axis line, a table 20 placed on the bed 11 so as to be rotatable around a rotational center line parallel with the Y axis, e.g., around a rotational center line perpendicular to the top face (around B axis), and a tool changer 30 for exchanging the tool T...
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Abstract
Machine tool with: a bed furnished with a base and two side walls provided standing along respective left and right sides of the base; a first saddle composed of a rectangular frame, with vertical sides provided perpendicularly and transverse sides provided sideways, and both ends of the frame sideways being supported on rear faces of the side walls so as to be perpendicularly movable; a second saddle arranged within the first-saddle frame and provided to be movable sideways, and having a front-to-rear penetrating through-hole; a spindle head arranged in the second-saddle through-hole and provided to be movable back-and-forth; a tool-retaining spindle supported, by the spindle head, with its axis paralleling the front-to-rear orientation and rotatable about its axial center; and, arranged on the bed, a table on which workpieces are set.
Description
BACKGROUND OF THE INVENTION [0001] 1. Technical Field [0002] The present invention relates to machine tools furnished with: a bed; a table on which workpieces are carried and which is installed on the bed; a spindle for retaining a tool, and, with its axis disposed horizontally, provided to rotatable centered on the axis; and a feed mechanism for moving the table and the main spindle relatively to each other along three orthogonal axes. [0003] 2. Description of the Related Art [0004] Such machine tools known to date include the example illustrated in FIG. 5 and FIG. 6 (cf. Japanese Unexamined Pat. App. Pub. No. 2003-266257). [0005] This machine tool 100 comprises: a bed 101; a table 102 for carrying a workpiece W and installed on the upper surface of the bed 101 along the front, movable back and forth (along the Z-axis); a column 103 stood on the upper surface of the bed 101 along the rear; a saddle 104 supported on a front face of the column 103, movable perpendicularly (along the ...
Claims
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IPC IPC(8): B23Q3/157
CPCB23Q1/626B23Q3/1574Y10T483/1755Y10T408/91Y10T409/307112Y10T409/309576
InventorTAKAYAMA, NAOSHIWATANABE, MICHIOKOMATSU, SATOSHI
OwnerDMG MORI CO LTD