JP5468292B2 - 2 spindle facing compound lathe - Google Patents

Description

The present invention relates to a two-spindle opposed composite lathe provided with a tool post above and below a spindle axis, and relates to the lathe characterized by the fixing or guide structure of the spindle to the bed and the guide structure of the upper and lower tool rests. .

  2. Description of the Related Art A two-spindle opposed composite lathe capable of performing milling and grooving on a workpiece by attaching a milling tool or a drill to a rotating tool shaft mounted on a tool post is known. Patent Document 1 relating to the application of the present applicant includes a left main shaft that is supported by a left main shaft fixed to a bed, a right main shaft that is supported by a right main table that can be moved and positioned in the Z-axis direction, and Z A rotary tool axis mounted on an upper tool rest that can be moved and positioned in the X, X, and Y axis directions and that can be swivel positioned around the Y axis (B axis), and a lower tool that can be moved and positioned in the Z and X axis directions A two-spindle opposed composite lathe with a tool turret mounted on a table is described.

  The two-spindle opposed composite lathe described in Patent Literature 1 includes a so-called slant-type bed having a bed upper surface inclined in a direction in which the front side is downward when viewed from the operator, and the upper tool rest is located at the upper rear part of the spindle axis. The lower tool post is located at the lower part on the near side of the main axis, and the upper tool post and the lower tool post are opposed to each other with the main axis being sandwiched. Therefore, as viewed from the operator, the Z-axis is in the left-right direction, the X-axis is in the oblique front / rear direction or the up-down direction inclined in the direction in which the front side is downward, and the Y-axis is in the oblique front / rear direction or in the oblique vertical direction in which the front side is inclined is there. The tool turret is mounted on the left spindle end of the lower tool post.

  On the other hand, in Patent Document 2, the right and left direction as viewed from the operator is the Z-axis direction, the up-and-down direction is the X-axis direction, and the front-rear direction is the Y-axis direction. A rotating tool axis is mounted on an upper tool rest that can be moved and positioned in the Z-axis, X-axis, and Y-axis directions and can be swivel-positioned about the Y-axis (B-axis). A two-spindle opposed composite lathe has been proposed that is mounted on a lower tool post that can be moved and positioned in the Z-axis and X-axis directions. The tool turret of the two-spindle opposed composite lathe described in Patent Document 2 is mounted on the right spindle side end of the lower tool post.

  Further, in the two-spindle opposed composite lathe described in Patent Document 2, the left and right main spindles and the lower tool rest are mounted on the front upper surface of the bed, and a frame-like column fixed to the upper rear surface of the bed is used for the upper tool rest. A left / right moving table (upper Z-axis moving table) is mounted, and a vertical moving table (upper X-axis moving table) for the upper tool post is mounted on the front surface of the upper Z-axis moving table. A tool post is mounted so that it can be moved and positioned in the Y-axis direction and can be rotated and positioned around the Y-axis. The left headstock is provided with the lower surface fixed to the upper surface of the left end which is one step higher on the bed front side, and the lower tool rest and the right headstock are provided on the front upper surface of the bed which is one step lower than the left end. It is mounted so as to be movable and positionable along the left and right guides (lower Z-axis guide).

  The left main spindle is a U-shaped downward as seen from the lower tool post side, and a tunnel portion is formed immediately below the left main spindle. The lower turret has a turret at the right end, and the lower turret on the left side of the turret and the lower Z-axis moving base that supports the turret so as to be movable in the X-axis direction move the turret to the left moving end. , And is accommodated in the tunnel portion immediately below the left main shaft.

JP 2003-205431 A JP 2006-297561 A

  In the two-spindle opposed composite lathe described in Patent Document 1, it is difficult to increase the movement stroke of the rotary tool axis in the Y-axis direction because the X axis and the Y axis are inclined, and the rotary tool axis is mounted. When trying to increase the support rigidity of the upper tool rest, the bed becomes large and requires a large installation area, so that there is a problem that heavy cutting by a rotary tool is limited.

  In addition, the two-spindle opposed compound lathe having the conventional structure described above has a large support rigidity of the upper turret and the upper turret can be turned around the Y axis, so that a large rotary tool can be mounted. By providing an automatic tool changer, it is possible to process a wide flat surface or an inclined hole. However, these lathes have a complicated and large bed shape, and the left and right guides (lower Z-axis guide) for the lower tool rest and the right headstock arranged on the bed upper surface below the workpiece cutting position. In addition, the structure of the cover that protects the feed screw from falling chips and cutting fluid becomes complicated, and there is a problem that the position of the main spindle becomes high in a large lathe.

  The present invention has been made to solve such problems of the conventional structure. The bed structure is simple and small, and the swarf of cutting chips and cutting fluid falling from the machining position is good. It is an object of the present invention to provide a new structure capable of reducing the size of the tool rest, the head stock, the lower portion of the head stock base, and the guide structure thereof.

  The two-spindle opposed composite lathe according to the present invention has two spindles 2 and 3 for fixing and moving or moving and moving arranged on the same spindle axis a in the horizontal direction with the workpiece gripping ends facing each other. A tool turret 4 arranged at a position immediately below the main spindle axis a between the main spindles 2 and 3, and a rotary tool axis 5 arranged at a position immediately above the main spindle axis a between the two main spindles 2 and 3; And a tool magazine 7 for storing a plurality of tools loaded on the rotary tool shaft.

  The fixed main shaft 2 is supported by a fixed main shaft base 21 fixed to the bed 11, and the moving main shaft 3 is supported by a moving main shaft 31 that can be moved and positioned along the main shaft axis a. The rotary tool shaft 5 is mounted on an upper tool rest 51 that can be moved and positioned in the Z-axis, X-axis, and Y-axis directions and can be rotated about the Y-axis. The tool turret 4 is moved and positioned in the Z-axis and X-axis directions. It is mounted on the movable spindle side end of the free lower tool rest 41. The Z-axis direction is the horizontal left-right direction as viewed from the operator, the X-axis direction is the same vertical direction, and the Y-axis direction is the same front-rear direction. In general, the fixed spindle 2 is arranged on the left side when viewed from the operator, and the moving spindle is arranged on the right side.

The bed 11 of the two-spindle opposed composite lathe according to the present invention includes a horizontal upper surface whose front edge portion is raised by one step and a vertical front surface (a surface facing the operator side) whose lower edge portion protrudes one step forward . ing. Left and right headstocks 21 and 31 for supporting the fixed main spindle 2 and the moving main spindle 3 (left and right as viewed from the operator; the same applies hereinafter) and a left and right moving base (lower Z-axis moving base) 42 for the lower tool rest 41 are: Fixed to the front surface of the bed or mounted on the left and right guides 12u and 12d fixed to the front surface of the bed so as to be movable and positionable. That is, the headstock 21 fixed to the bed or the headstock base 22 that supports the headstock 21 is fixed to the front surface of the bed 11 in the vertical direction and is moved and positioned in the left-right direction. The moving table 42 is movable by being guided by left and right guides (lower Z-axis guides) 12 u and 12 d fixed to the front surface of the bed 11 in the vertical direction. A guide 12d below the guides 12u and 12d is disposed at a protruding portion of the lower front edge of the bed. A vertical guide (lower X-axis guide) 43 that guides the lower tool rest 41 in the vertical direction is fixed to a vertical front surface (surface facing the operator side) of the lower Z-axis moving table 42.

  In the above structure, if the headstock 21 fixed to the bed or the headboard base 22 that supports the headstock 21 is fixed to the front surface of the bed 11 at the intermediate position between the lower end of the back surface and the back surface, the head stock base 21 or the head stock base A space 23 penetrating from side to side can be formed between the back surface of the lower portion of 22 and the front surface of the bed 11. The lower Z-axis guides 12u and 12d and the feed screw 45 can be provided through this space. Furthermore, when the lower tool rest 41 is moved to the left moving end, the lower tool rest 41 is moved in the left-right direction. An extension 46 provided on the lower Z-axis moving table 42 to increase the guide rigidity and a cover that protects the lower Z-axis guides 12u and 12d and their feed screws 45 from cutting fluid and chips penetrate the space 23. Thus, the structure can be moved left and right. Therefore, the extension 46 can be provided on the fixed spindle base 21 side, and the Z-axis feed screw 45 for the lower tool post and the Z-axis feed screw 35 for the moving spindle base 31 are arranged on the same axis. Even in this case, it is possible to avoid interference between the lower Z-axis moving table and the moving head table 31, and a compact device arrangement is possible.

  In the two-spindle opposed composite lathe, the spindle head 21 of the fixed spindle 2 on the side where heavy cutting is performed is a fixed spindle head fixed to the bed 11. The fixed spindle base 21 of the two-spindle opposed composite lathe according to the present invention has a structure in which the fixed spindle 2 is pivotally supported by a portion projecting (overhanging) toward the moving spindle 3 above, and the lower tool post 41 is counteracted. By mounting the tool turret 4 on the fixed spindle side end, when the tool turret moves to the fixed spindle side moving end, the lower tool post 41 located on the left side of the tool turret 4 is The structure can be accommodated so as to be movable up and down below. Then, the vertical guide surface of the lower tool post is used as the front surface of the lower Z-axis moving table 42 (a surface parallel to the front surface of the bed 11), and the vertical guide (lower X-axis guide) of the lower tool post 41 is placed on the surface. 43) and 43 and its feed screw 47 can be provided.

  With this structure, the headstock or the headstock base 22, the lower tool rest 41 and the guide structure thereof, and the moving headstock 31 arranged below the spindle axis a can be arranged in a compact manner, and further, the cutting fluid is provided below the cutting fluid. Further, by disposing the chip collection tank 13, it is possible to simplify the structure for preventing the cutting fluid and the chips from entering the mechanism portion where the guide and the feed screw are disposed.

  Moreover, since the lower tool post 41 is on the side opposite to the main spindle of the tool turret 4 due to the above structure, a distance is provided between the left / right moving base 42 that supports the lower tool post 41 and the main spindle 31. The left and right guides 12u and 12d can be made common, and even if the feed screw 45 in the left and right direction of the lower tool post and the feed screw 35 of the moving headstock 31 are arranged on the same axis, both 45 , 35 can be provided with a necessary movement stroke in the left-right direction. Therefore, the movement positioning structure in the left-right direction of the lower tool rest 41 and the moving spindle stock 31 can be made compact and hardly affected by the cutting fluid or chips.

On the front side and the back side of the upper surface of the bed 11, left and right guides 14, 14 are provided with a front guide disposed at a level higher than the front edge of the bed upper surface. Tool rest 51 on the second spindle facing the composite lathe of this invention the preferred structure is the upper left moving table 52 which is guided in the lateral guides 14 and 14, before and after the disposed above the left and right moving base of the upper surface guide 53, 53 And an upper vertical moving table 57 having a downward direction guided by the vertical guides 56 and 56 arranged on the longitudinal front surface of the front and rear moving table as a cutting direction of the tool with respect to the workpiece. The upper vertical moving table 57 is provided so as to be capable of swivel positioning around the front-rear axis. With this structure, the support rigidity of the upper tool rest 51 for driving a large rotary tool can be increased, and a rational arrangement of a tool magazine and a tool changer can be realized.

  According to the present invention, the bed structure of the two-spindle opposed composite lathe can be simplified and reduced in size. Further, the guide and moving positioning mechanism of the headstocks 21, 31 to the headstock base 22 and the lower tool rest 41 arranged below the spindle axis a can be made compact, and it is easy to increase the vertical stroke of the lower tool rest. Become.

  Further, according to the present invention, a guide surface for guiding the lower tool post 41 in the left-right direction (a surface provided with the left-right guides 12u and 12d) and a vertical guide surface (a surface provided with the vertical guides 43 and 43). Can be formed as a substantially vertical surface at a position on the back side (bed side) from directly below the spindle axis a, and by disposing a recovery tank at a position immediately below the spindle axis a in front of the bed 11, The cutting fluid and chips can be easily collected, and the cover structure for preventing the cutting fluid and chips from entering the guide surface can be simplified.

  Further, since the bed shape is simplified, the prediction by the calculation of the thermal deformation can be made accurately and the correction can be performed correctly, so that the processing error due to the thermal deformation can be reduced.

Overall perspective view showing an embodiment Right side view Side view of part A in FIG. Side view of part B in FIG. Overall front view Perspective view of headstock (fixed headstock) Perspective view of tool post (bottom tool post)

  Hereinafter, specific examples of the present invention will be described with reference to the drawings. The figure shows a two-spindle opposed composite lathe having the structure of the present invention, two main shafts 2 and 3 opposed on the same axis a, a rotary tool shaft 5 disposed immediately above the main shaft axis, and a position immediately below the main shaft axis. And a tool turret 4 disposed on the surface. The direction of the spindle axis a is the left-right direction when viewed from the operator, the tool cutting direction of the rotary tool shaft 5 and the tool turret 4 is the vertical direction, the direction perpendicular to these is the front-rear direction, the left and right are the Z-axis of the lathe, and the upper and lower are X The axis is front and back is the Y axis, and the operator side is the front.

  The left headstock 21 as viewed from the operator is fixed to the bed 11, and the right headstock 31 can be moved and positioned in the left-right direction. The upper tool rest 51 on which the rotary tool shaft 5 is mounted can be moved and positioned in the left and right, up and down and front and rear directions, and can be swiveled and positioned around the front and rear direction axes. Tool magazines 7 and 7 containing tools to be mounted on the rotary tool shaft 5 are arranged at positions above the left and right headstocks 21 and 31 of the rotary tool shaft 5. The lower tool rest 41 on which the tool turret 4 is mounted is located on the left side of the tool turret 4 and can be moved and positioned in the left and right and up and down directions.

  The bed 11 is fixed to or integrated with an upper surface that is gently inclined in a direction in which the front of the base 1 is lowered. The bed 11 is provided with a horizontal upper surface having a substantially rectangular plane and a front edge that is one step higher, and a vertical front surface having a lower edge protruding forward one step. The reason why the upper surface of the base 1 is an inclined surface with a lower front is to guide lubricating oil or the like falling through the bed to a collection tank 13 that is detachably disposed in front of the base 1.

  Right and left guides 12u and 12d are arranged above and below the front surface of the bed 11 over substantially the entire length of the front surface in the left and right direction. Here, the lower guide 12d is disposed at a protruding portion of the lower edge of the bed front surface. Also, a feed screw 45 for moving the lower tool post 41 in the left-right direction to a position approximately between the upper and lower guides 12u, 12d, and a feed screw 35 for moving the right spindle stock 31 in the left-right direction, Is arranged with the former positioned on the left side of the bed front and the latter positioned on the right side of the bed front, and feed motors 48 and 38 for rotationally driving them are positioned at the left and right ends of the bed front. Has been placed.

  The left head stock 21 on the left side as viewed from the operator is fixed to the front surface of the bed 11 via the head stock base 22. The headstock base 22 is a part of the headstock, but for convenience of explanation, a portion supporting the left main shaft 2 is referred to as a left main shaft base 21, and the left main shaft base and the bed 11 are provided. A portion interposed between the two will be described as a headstock base 22.

  As shown in FIG. 6, the headstock base 22 has a wide inverted L-shaped block shape in a front view including a rectangular portion extending toward the right headstock 31 on the upper part of a vertically long rectangular shape when viewed from the front. The main spindle is provided, and the left head stock 21 is attached to the front surface of the extending part above the upper part integrally or fixed with a bolt or the like. Legs 25u and 25d extending rearward at the lower edge of the rear surface (rear surface) of the headstock base 22 and an intermediate height are integrally provided, and the upper leg 25u is provided at the left end of the front surface of the bed 11. It is fixed to the bed 11 at a position above the upper guide 12u, and the lower leg portion 25d is fixed to the bed 11 at a position below the lower guide 12d. Below the portion protruding to the right head stock 31 side on the back side of the head stock base 22 (the portion on which the left head stock 21 is mounted), the projecting portion is extended to the right head stock 31 side. A reinforcing plate portion 26 is provided integrally to connect and integrate the upper leg portion 25u. A left main spindle motor 29 that rotates the left main spindle 2 is fixed to the main spindle base 22 and drives the left main spindle 2 to rotate by driving the belt 27.

  When the tool turret 4 is moved to the left movement end, the lower tool post 41 located on the left side of the tool turret is below the left headstock 21 and the upper protrusion 28 of the headstock base. Considering the location. That is, when the tool turret 4 moves to the left moving end, the lower tool post 41 moves in the vertical direction below the left headstock 21 and the protruding portion 28 above the headstock base supporting the left headstock. Positioned. The reinforcing plate portion 26 uses a dead space between the lower tool rest 41 when the tool turret 4 moves to the left moving end and a vertical movement table (described later) that supports the lower turret 4 so as to be movable in the vertical direction. In order to further increase the support rigidity of the left main shaft 2, the left main shaft 2 is provided.

  A space 23 penetrating in the left-right direction is formed between the headstock base 22 and the front surface of the bed 11 and between the upper and lower legs 25u, 25d, and left and right guides 12u, 12d and The base end of the left and right feed screw 45 for the tool turret 4 passes through this space. In addition, a shielding cover (not shown) for protecting the left and right guides 12u and 12d and the left and right feed screw 45 from cutting fluid and chips falling from above when guiding a workpiece is guided by the left and right guides 12u and 12d. The shield cover is fixed to a left / right moving table for the lower tool post, and the shielding cover is also movable left / right through the space 23.

  The lower tool post 41 that supports the tool turret 4 around an indexing axis parallel to the main axis a is substantially rectangular parallelepiped, guided by the left and right guides 12u and 12d on the front surface of the bed, and moved and positioned by the left and right feed screws 45. It is guided by upper and lower guides 43 provided on the front surface of the left and right moving table 42 and is engaged with a vertical feed screw 47 disposed at a substantially intermediate position between these guides, and is moved and positioned in the vertical direction. A feed motor 49 that rotationally drives the vertical feed screw 47 is fixed to the lower end of the left / right moving base 42 at a position below the lower tool post 41, and connects the output shaft facing downward and the lower end of the vertical feed screw 47. The vertical feed screw 47 is driven to rotate through a coupled rotation transmission mechanism.

  In addition, in the shape of the bed 11, the lower turret 41 (which is also the same for the right headstock described later) is provided with a raised portion at the front edge of the bed upper surface and a portion protruding forward one step at the front lower edge. ) And the moment generated by the processing reaction force can be received in a mechanically more rigid manner.

  The right spindle stock 31 includes a support structure portion 33 that extends downward from the back surface side of the shaft support portion 32 that supports the right spindle 3, and the lower back portion of the support structure portion is the left and right common to the lower tool rest 41. It is guided by the guides 12u and 12d, and can be moved and positioned in the left-right direction by being screwed with a feed screw 35 coaxially arranged with the left-right feed screw 45 of the lower tool post 41 and disposed on the right side thereof. That is, the shaft support portion 32 of the right headstock is located on the front side on the upper end of the support structure portion 33 that is guided by the left and right guides 12u and 12d and the feed screw 35 so as to be movable and positioned by the left and right guides 12u and 12d. It is arranged so as to protrude. A right spindle motor 39 that drives the right spindle 3 is fixed to the front side of the support structure portion 33 of the right spindle base, and rotates the right spindle 3 by driving a belt 37.

  As described above, in the two-spindle opposed composite lathe shown in the figure, the tool head turret 4 is mounted so that the left headstock 21 is fixed to the bed 11 and fixed at a fixed position, and the right headstock 31 can be moved and positioned in the left-right direction. The lower tool post 41 is mounted so as to be movable left and right and up and down, but these are fixed to the substantially vertical front surface of the bed 11 or left and right by guides 12u and 12d fixed to the front surface and a feed screw 35 or 45. It is mounted so that it can move and position freely Then, a left and right elongated collection is received below the lower tool rest 41 below the workpiece machining position between the left spindle 2 and the right spindle 3 to receive cutting fluid and chips falling from the machining position during workpiece machining. A tank 13 is detachably installed.

  Left and right struts 15 are erected on both sides of the bed 11 in front, and an upper girder 16 is provided to connect the upper ends of the left and right struts. An upper left / right guide 14 and an upper left / right feed screw 55 are arranged on the upper portion of the bed 11, and the upper left / right moving base 52 is guided by the upper left / right guide 14 and screwed to the upper left / right feed screw 55, thereby It is mounted so that it can be moved and positioned in the left-right direction by a feed motor 58 that rotationally drives the screw 55. The thing on the near side of the upper left and right guides 14 is arranged at a level higher than the bed front edge.

  A front / rear guide 53 and a front / rear feed screw (not shown) are arranged on the upper side of the upper left / right moving table 52, and the front / rear moving table 54 having a tall rectangular front surface as viewed from the front of the machine is provided. And is mounted so as to be movable and positionable in the front-rear direction by being screwed into a front-rear feed screw that is rotationally driven by a feed motor 59.

  An upper vertical guide 56 and an upper vertical feed screw (not shown) are arranged on the front surface of the front / rear moving table 54, and the upper vertical movement table 57 is guided by the upper vertical guide 56 and rotated by a feed motor 60. The upper upper and lower feed screws are screwed and mounted so as to be movable in the vertical direction.

  The upper vertical moving table 57 is provided with a rectangular tube-shaped support tube 61 protruding forward. On the front surface of the support cylinder 61, an upper tool rest 51 is mounted so as to be rotatable around a longitudinal axis. A turning support mechanism and a turning feed motor for the upper tool rest 51 are provided in the support cylinder 61. A rotary tool shaft 5 is pivotally supported on the upper tool rest 51 with its tool grip end facing downward. A rotary drive mechanism for the rotary tool shaft 5 is provided in the upper tool rest 51.

  A support member 71 of the tool magazine is fixed to the front surface of the support column 15 erected on the left and right sides of the bed 11. The support member 71 extends inward in the left-right direction on the front side of the support column 15, extends forward from the inner end thereof, and the tool magazines 7 and 7 and the tool changers 72 and 72 are attached to the extended portion. Has been. The tool magazines 7 and 7 shown in the figure have a disk structure in which a tool is selected by rotating around a left-right axis, and on the circumference of the outer surface of the support disk 73 (surface on the counter-rotating tool axis side). A number of tool holding portions 74 are provided to hold the tool in the left-right direction. Each tool holding part 74 is provided with the direction change mechanism which orient | assigns the direction of the tool hold | maintained in the position rotated to the lowest end to the downward direction. The tool changers 72 and 72 exchange tools between the tool mounted on the downward rotating tool shaft 5 and the tool indexed at the lowest end of the tool magazines 7 and 7.

2 fixed spindle 3 moving spindle 4 tool turret 5 rotating tool axis
11 beds
12u, 12d left and right guide
21 Fixed headstock
31 Moving headstock
41 Lower tool post
43 Vertical guide
51 Upper tool post a Spindle axis

Claims (4)

The Z-axis is the horizontal direction, the X-axis is the vertical direction, the direction perpendicular to both axes is the Y-axis direction with the operator side as the front side, and there are two main shafts facing each other on the same main shaft axis, rotating above the main shaft axis In a two-spindle opposed composite lathe equipped with an upper tool post that rotates about the Y axis with a tool axis attached, and with a lower tool post with a tool turret attached below the spindle axis,
A bed having a horizontal upper surface with a raised front edge and a vertical front surface with a lower edge protruding forward one step, and an upper Z-axis guide for guiding the Z-axis movement of the upper tool rest is an upper surface of the bed the disposed place the front guide in one step raised portion of the bed upper surface leading edge, the lower guide lower Z-axis guide for guiding the Z-axis movement of the lower tool rest is in front of the bed The lower X-axis guide, which is disposed in a protruding portion of the lower front edge of the bed and guides the X-axis movement of the lower tool rest, is substantially the same as the surface of the lower Z-axis moving table guided by the lower Z-axis guide. A two-spindle opposed composite lathe, which is arranged on a parallel vertical surface and has two headstocks mounted on both sides of the surface of the bed in the Z-axis direction. The Z-axis is the horizontal direction, the X-axis is the vertical direction, the Y-axis direction perpendicular to both axes is the front-rear direction with the operator side as the front, and includes a fixed main axis and a moving main axis facing each other on the same main axis. In a two-spindle opposed composite lathe equipped with an upper tool post that pivots about the Y axis with a rotating tool axis mounted thereon, and a lower tool post with a tool turret mounted on the lower side of the spindle axis line,
A bed having a horizontal upper surface with a raised front edge and a vertical front surface with a lower edge protruding forward one step, and an upper Z-axis guide for guiding the Z-axis movement of the upper tool rest is an upper surface of the bed the disposed place the front guide in one step raised portion of the bed upper surface leading edge, the lower guide lower Z-axis guide for guiding the Z-axis movement of the lower tool rest is in front of the bed A lower X-axis guide that is arranged on the protruding portion of the lower front edge of the bed and guides the X-axis movement of the lower tool rest is arranged in front of the lower Z-axis moving table guided by the lower Z-axis guide. The fixed main shaft is fixed to the upper and lower portions of the lower Z-axis guide at the end of the front surface of the bed and is pivotally supported by a portion extending forward from the upper portion of the fixed main shaft extending upward. From the top of the moving headstock that is guided by the Z-axis guide and extends upward Characterized in that it is supported by a Zhang out portion, the second spindle facing the composite lathe. An upper Y-axis guide for guiding the Y-axis movement of the upper tool rest is disposed on the upper surface of the upper Z-axis movement base guided by the upper Z-axis guide, and an upper X-axis guide for guiding the X-axis movement of the upper tool rest is provided. The two-spindle opposed composite lathe according to claim 2, wherein the lathe is disposed on a front surface of an upper Y-axis moving table guided by the upper Y-axis guide.   The tool turret is attached to the end of the lower tool rest on the moving spindle base side, and when the lower tool rest moves to the fixed spindle side moving end, the lower tool post is positioned below the shaft support of the fixed spindle. The two-spindle opposed composite lathe according to claim 2 or 3.

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