JPS5830082B2 - Machine Tools - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a machine tool in which machining units are formed on both sides of a machine base with a space for transporting a workpiece formed in the center so that workpiece axes are parallel to each other. The purpose of this is to facilitate the transport of workpieces to processing units and to allow multiple workpieces to be processed simultaneously using a common machine base.

Embodiments of the present invention will be described below based on the drawings.

In FIG. 1, numeral 10 indicates a machine base, and this machine base 10 includes four posts 11 each having a rectangular cross-sectional shape, which are erected at respective apexes of a quadrilateral at intervals, and the upper portions of these posts 11. Box beam 1 supported by
It consists of 2.

As a result, each side of the machine base 10 has a substantially gate shape,
A space 13 for transporting a workpiece is formed in the center of the machine base 10, passing through the machine base 10.

Each surface of the machine base 10 is provided with a processing unit M.

FIG. 2 shows such a processing unit M, in which a headstock 14 and a spindle 15 are installed on the left and right sides of the machine base 10, that is, on each side of the two posts 11, facing each other with the space 13 in between. has been done.

The headstock 14 has a rotary motor 16 installed on the headstock 14.
A chuck 11 which is rotationally driven is rotatably provided, and a ram 19 having a center 18 fitted thereon is slidably fitted in the center mount 15 on an extension of the axis of rotation of the chang 21.

A work W carried in through the space 13 as described later is supported between the headstock chuck 17 and the center 18.

Also, the upper part of the machine base 10, that is, the box-shaped beam 1
2, a pair of rails 21 are arranged in parallel in a direction parallel to the rotation axis of the chuck 170, and a slide base 22 is attached to the rails 21 in the left-right direction (in a direction parallel to the workpiece axis).
is slidably mounted on the

A feed screw 24 rotatably driven by a pulse motor 23 is mounted between the pair of rails 210.
A feed nut (not shown) fixed to the slide base 22 is screwed into the slide base 22 .

A pair of rails 25 are arranged in parallel on the slide base 22 in a direction perpendicular to the sliding direction of the slide base 22, and a cross table 26 is mounted on the rails 25 so as to be slidable in the vertical direction.

A feed screw 28 is mounted between the pair of rails 250 and driven one rotation by the nockle smoke 21, and a feed nut 29 (see FIG. 5) fixed to the cross table 26 is screwed onto the feed screw 28. has been done.

A plurality of tool holders 3 are mounted on the cross table 26 on the circumference.
A machining head 31 into which a 0 is removably inserted is supported rotatably and indexably within a plane parallel to the sliding direction of the slide base 22 and cross table 26.

The machining head 31 is two-dimensionally pulse-fed by each of the pulse motors 23 and 27, and is connected to the headstock chuck 17 and the tailstock by a bite T held in a bite holder 30 indexed to the machining position of the machining head 31. stand center 18
The work W supported between the two is cut into a predetermined shape.

The headstock 14 and tailstock 15 installed on the left and right sides of the machine base 10 and the processing head 31 mounted on the upper part of the machine base 10 constitute a processing unit M. A total of four sets are constructed on each side of the machine base 10.

As a result, the axes of the workpieces W supported by the two sets of machining units M located on opposite sides become parallel to each other.

FIG. 3 shows a mechanism for attaching the cutting tool holder 30 to the processing head 31.

That is, each holder attachment part 32 provided at equal intervals on the circumference of the processing head 310 is formed with a cylinder 34 in which a piston 33 is fitted so as to be slidable in the radial direction.

A T-shaped engagement portion 35 is formed at the protruding end of the piston 33, and a T-shaped slot 36 formed in the tool holder 30 is engaged with the T-shaped engagement portion 35 so as to be movable in the tangential direction of the processing head 31. It looks like it will fit together.

The piston 33 is pressed toward the center of rotation of the processing spatula 1310 by the action of a disc spring 37 inserted into one chamber of the cylinder 34, thereby attaching the tool holder 30 to the holder via the T-shaped image joint 35. is adapted to be crimped and clamped to the portion 32.

The other chamber of the cylinder 34 is connected to a pressure fluid supply source through a passage 38, and by supplying pressure fluid to the chamber, the piston 33 is slid against the action of the disc spring 31, The clamp of the tool holder 30 is released.

Two parallel first pilot pars 40 are installed at a distance from each other on the upper surface of the box beam 12, and a slider 41 is mounted movably on the high-lot pars 40.

The slider 41 has two parallel second pilot par 4s.
2 is installed in a direction perpendicular to the first pilot par 40, and a rack 43 is installed on the slider 41 in parallel with the pilot par 42.

A support table 44 is slidably mounted on the second pilot par 42, and a support table 41 having a shaft portion 46 on which a Geneva gear 45 is engaged is rotatably supported on the support table 44. There is.

A tool magazine 48 in which a plurality of tool holders 30 are stored at equal intervals on the circumference is removably placed on the support chiffle 47, and the tool magazine 48 is transported by a transport device (not shown). There is.

Further, a rotary shaft 51 connected to a rotary motor 49 via a worm wheel mechanism 50 is rotatably mounted on the support base 44 .

A first electromagnetic clutch 53 is connected to the rotating shaft 51 and connected to an index plate 52 having a pin that engages with the Geneva gear 45, and a gear 56 is connected to the rack 43 through gears 54 and 55. A second electromagnetic clutch 57 is fitted to each other so as to be relatively rotatable.

A movable clutch 5 is provided between these electromagnetic clutches 53 and 57.
8 is locked to the rotating shaft 51 so as to be movable in the axial direction.

The movable clutch 58 is normally held at a neutral position in which it does not engage with either the first or second electromagnetic clutches 53, 570, but by energizing either the electromagnetic clutches 53, 570, the movable clutch 58 is attracted. and is selectively coupled to electromagnetic clutches 53 and 5γ.

This allows the common rotary motor 49 to selectively rotate and index the tool magazine 48 and move the support base 44.

The tool magazine 48 is moved two-dimensionally on the box-shaped beam 12 by the movement of the slider 41 by a feeding device (not shown) and the movement of the support base 44 by the rotation motor 49.

In order to exchange the tool holder 30 between the tool magazine 48 and the machining head 31 of each machining unit M,
It is positioned at a position that has a certain relationship with the slide base 22 of the processing unit M.

However, the tool magazine 48 is usually placed on standby at a position where it does not block the cavity of the box beam 12 so as not to interfere with the conveyance of the work magazine, which will be described later.

The slide base 22 of each processing unit M has a tool holder 30 between the processing head 31 and the tool magazine 48.
An exchanging device 60 for exchanging is provided.

That is, as shown in FIGS. 5 and 6, a support bracket 61 is fixed to the slide base 22 at a side position of the cross table 26, and a pair of support brackets 61 fixed to the lifting platform 62 are attached to the support bracket 61. A pilot par 63 is guided so as to be movable up and down.

The lifting table 62 is moved up and down by a cylinder device 64 installed on the support bracket 61, and is normally held at the lower end.

A support shaft 65 is rotatably supported on the lifting table 62 about a vertical axis, and a swivel table 66 is installed on the support shaft 65.

A cylinder 67 is formed within the swivel base 66, and a piston 68 is fitted into the cylinder 67 so as to be rotatable and slidable in the horizontal direction.

A gripping claw 69 that removably grips the tool holder 30 is pivotally attached to the tip of the piston 68 so as to be openable and closable.

The cross table 26 is used to hold the tool holder 3 on the processing head 31 when replacing the tool holder 30.
0 is raised to the original position where it maintains a certain relationship with the gripping claws 69 of the exchange device 60.

When the cross table 26 is raised to its original position, the gripping claws 69 are advanced to grip the cutting tool holder 30 to be replaced.

At this time, in the machining head 31, the clamp of the tool holder 30 is released by the action of fluid pressure.

With the cutting tool holder 30 being gripped by the gripping claws 69 in this manner, the elevating table 62 is raised by the cylinder device 64, and the cutting tool holder 30 is removed from the processing head 31.

At the rising end position of the elevating table 62, the gripping claw 69 is rotated 90 degrees around the piston 68, and the swivel table 66 is rotated 180 degrees around the support shaft 65.
The cutting tool holder 30 is transferred onto the tool magazine 48 which has been positioned in advance corresponding to the processing unit M.

Further, the gripping claw 69 grips a desired bite holder 30 by rotating and indexing the tool magazine 48, and inserts it into the processing head 31 in a cycle reverse to that described above.

A board 70 is installed in the center of the machine base 10,
A holding table 71 is installed on the substrate 70.

On the holding table 71 is a work magazine γ2 in which a plurality of workpieces W to be supplied to each processing unit M are stored at equal intervals on the circumference.
is placed in a removable manner.

The work magazine 72 is carried in from above the machine base 10 by a transport device (not shown), and is positioned and placed on the holding table 71.

A workpiece transfer robot 73 is provided on the substrate 70 so as to be movable along a trajectory surrounding the holding table 11 .

The workpiece transport robot 73 is positioned at a position corresponding to each processing unit M, and transports the workpiece W between the workpiece magazine 72 and the processing unit M through the space 13.

The workpiece W carried into the processing unit M by the workpiece transfer robot 73 is supported by the center 18 and pushed into the chuck 17 by the advancement of the tailstock ram 19.
be clamped to.

Thereafter, although not shown, NC data for processing the workpiece W is transferred from the computer to a control unit provided for each processing unit M, and the processing head 31 processes the required byte T based on the NC data. The pulse motor 23 is rotatably indexed to index the position.
Pulses are distributed to 27, and the workpiece W is subjected to NC processing.

When the η mark of the workpiece W is completed in each Do work unit M, the workpiece W is returned to the workpiece magazine 72 by the workpiece transfer robot 73, and when all the workpieces W are returned to the workpiece magazine 72, the workpiece W is returned to the workpiece magazine 72. is transported to a predetermined position by a transport device (not shown), and a work magazine 72 storing a work W to be newly processed is carried onto the holding table 71.

The above-mentioned takeover is particularly suitable for lot production, and allows very highly efficient υ-marking.

However, by providing each processing unit M with different functions such as a cutting mechanism and a grinding function, and sequentially feeding the workpiece W to the processing units M having different functions, various processing operations can be performed on the workpiece W continuously. You can also do that.

As described above, according to the present invention, by arranging at least two sets of machining units on both sides of a portal-shaped machine base so that the workpiece axes are parallel to each other, a plurality of workpieces can be processed using a common machine base. They can be processed at the same time, and the effect of significantly improving processing efficiency can be achieved.

Moreover, the central part of the portal-shaped machine base is used as a space for transporting workpieces, and the workpieces are transported to the processing unit through this space, so the workpieces can be transported to the processing unit without being obstructed by the processing head located above. This also provides the advantage that the workpiece can be transported much more easily.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and Fig. 1 is a perspective view showing an overview of the machine tool, Fig. 2 is a front view of the machine tool, and Fig. 3 is a front view of the machine tool.
The figure is a sectional view taken along the line ■-■ in Fig. 2, Fig. 4 is a sectional view taken along the TV-TV line in Fig. 1, and Fig. 5 is a sectional view taken along the line
The figure is a view seen from the V direction of Fig. 1, and Fig. 6 is a view of Vl of Fig. 5.
- A cross-sectional view taken along the Vl line, Figure 7 is the ■■ of Figure 1.
It is a figure seen from the direction. 10... Machine base, 13... Space, 14... Headstock, 15... Tailstock, 31... Machining head , M... Processing unit, 72... Work magazine, 73,...
- Workpiece transfer robot, W...Pa°°workpiece.

Claims (1)

[Claims] 1. A gate-shaped machine base is installed with the central part as a space for transporting the workpiece, and a headstock and a spindle stand that cooperate with each other to rotatably support the workpiece are sandwiched between the space on the left and right sides of this machine base. A machining head for machining a workpiece is supported on the upper part of the machine base so as to be movable in a direction parallel to the axis of the workpiece. A processing unit is arranged on the front side of the machine base so that workpiece axes are parallel to each other, and the processing unit is provided with a workpiece transfer device for transporting the workpiece through the space. A machine tool characterized by: