JPS63120004A - Turret head changing device - Google Patents

Abstract

PURPOSE:To achieve effective change of turret heads by turning a swing arm with a new turret head attached to each of head clamping mechanisms of a pair of head support arms, and then turning the arms through actuation of a motor after heads installed on the machine are held by other clamping mechanisms. CONSTITUTION:Turret heads to be changed are attached to head clamping mechanism 152a, 152c, respectively. Then, machining devices 14, 16 are actuated to have heads 54, 54a held in engagement with clamping mechanisms 152b, 152d, respectively, and first and second head support arms 136, 140 are rotated through an angle of substantially 180 deg. around a support pin 126 and stopped at a predetermined position. Then, the head support arms 136, 140 are turned through a motor 96, a worm gear 122 and a worm wheel 124. Then turret heads to be changed are placed between the machining devices 14, 16 and held by head holders 52, 52a, and thus change of turret heads can be effectively performed by a single device.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a turret head changing device for a machine tool, and more specifically, for a machine tool arranged to be able to process two workpieces at once. , a device for exchanging a set of turret heads disposed to face each other with another turret head, comprising: a swing arm that is rotatably displaced toward an intermediate portion of each of the turret heads; A pair of rotatable head support arms are provided at the tip of the machine tool, and a plurality of head clamp mechanisms are attached to each of the head support arms, making it necessary to replace the turret head of the machine tool. When necessary, a new turret head is attached to each of the head clamp mechanisms, and the swing arm is swung to replace the turret head attached to the machine tool and the new turret head simultaneously with the turret head exchanger. The present invention relates to a turret head exchange device that enables exchange.

Conventionally, workpieces that have multiple cutting parts, for example,
Machining centers are widely used for cutting automobile engines and the like.

The machining center includes an automatic tool changer that automatically exchanges cutting tools, an automatic indexing device that automatically brings the machined surface of the workpiece and the cutting tool face to face, and the machining center moves the workpiece to the machining center. Once installed, the tools required for each cutting process are automatically exchanged, and the cutting process of the workpiece is suitably performed by numerical control.

Incidentally, in the machining center configured as described above, the machining axis is normally configured as an axle. For this reason, as mentioned above, even if tools are changed using an automatic tool changer or the like to handle a wide variety of workpieces, the time required for the machining axis to travel back and forth to the magazine section where the tools are stored, and the time required to change tools. The non-cutting time increases, and the time for cutting the workpiece becomes relatively short. Therefore, the prior art exhibits a drawback in that machining efficiency for the workpiece is reduced due to exchanging cutting tools and the like.

Furthermore, if the machining center is installed in a transfer line and the machining center performs a large number of cutting operations on the same workpiece, it will take a considerable amount of time to replace the cutting tools at the machining station that includes the machining center. As a result, the other machining stations have to wait for their machining operations until the exchanging of the tool and cutting with the new tool at the machining station are completed.

For this reason, for example, two machining centers are installed in the machining station where the machining center is installed, and each machining center performs predetermined machining on the same workpiece at each station in the transfer line. Currently, the machining times are adjusted and controlled so that they are substantially the same.

However, in this case as well, as described above, it is impossible to avoid the disadvantage that a considerable amount of time is required to replace the cutting tool, resulting in a decrease in machining efficiency.

The present invention has been made in order to overcome the above-mentioned disadvantages, and provides a set of turret-type machine tools in which turret heads on which a plurality of cutting tools are mounted face each other. A swing arm is provided near the machine and swingable toward the central space of the set of machine tools, a pair of head support arms are held at the tips of the swing arm, and the pair of head support arms are A head clamp mechanism for holding the turret head is provided at each end of the head support arm, and when replacing the turret head, a new head clamp mechanism is installed at each end of the pair of head support arms. To a pair of turrets: Rotate the swing arm with the throat attached, and then make the remaining head clamp mechanism receive the turret head attached to the machine tool, thereby machining the turret head. After being removed from the machine, the pair of head support arms are rotated, and a new turret head, which is attached to one end of the arm via a head clamp mechanism, is attached to the machine tool. An object of the present invention is to provide a turret head exchange device that can perform the exchange of the turret head at once with a single device, thereby significantly shortening the turret head exchange work time and, therefore, making it possible to sufficiently improve production efficiency. .

In order to achieve the above object, the present invention provides an apparatus for exchanging a set of turret heads mounted on each of a set of turret-type machine tools arranged at a predetermined interval, the turret head The exchange device includes a swing arm that corresponds to the central space of the turret type machine tool and is rotatably pivoted to a frame member disposed near the machine tool, and a rotating arm that is attached to the swing arm. a drive source, a worm gear connected to a rotational drive shaft of the rotational drive source, a worm wheel fitted with a support shaft that meshes with the worm gear and rotatably engages the swing arm, and is fixed to the support shaft. The present invention is characterized in that it comprises a pair of head support arms, and a plurality of head clamp mechanisms attached to the head support arms for holding the coolet head.

Next, preferred embodiments of the turret head changing device according to the present invention in relation to a machine tool to which the device is installed will be described in detail with reference to the accompanying drawings.

1 and 2, reference numeral 10 indicates a turret type machine tool, and this turret type machine tool 10 basically consists of a base 12 and a first base mounted on the base 12. It is composed of a processing device 14, a second processing device 16, and a turret head exchange device 18 according to the present invention.

Note that in this embodiment, the turret type machine tool 10
is a so-called composite machine tool that is equipped with a first processing device 14 and a second processing device 16, but the turret head exchange device can also be used when two normal turret-type machine tools are arranged in parallel. Needless to say, it is possible to adopt

The first processing device 14 includes a motor 20 for displacing it in the direction of arrow X, and this motor 20 is fixed to the base 12 via a plate 22. The rotational drive shaft 20a of the motor 20 is connected to one end of a first joint member 26 via a compression member 24. A rotating shaft 28 extends from the other end of the first joint member 26 in the direction of arrow Z, and the tip of the rotating shaft 28 engages with the second joint member 30 . The second joint member 30 has first and second bevel gears or spiral gears (
(not shown), and a ball screw (not shown) extends from the second gear in the direction of arrow X.

A part of the housing 32 constituting the first processing device 14 is screwed into this ball screw. A motor 34 is disposed near one end of the housing 32 via the base 12, and this motor 34 functions to displace the first processing device 14 in the direction of arrow Z via a ball screw (not shown). do.

A main body 36 is provided upright on the upper surface of the housing 32, and a pair of guide rails 40, 42 are provided on one side of the main body 36, extending in the direction of arrow Y and spaced apart by a predetermined distance. attached. An elevating table 44 movable in the direction of arrow Y is disposed on the guide rails 40 and 42. A motor 46 for driving the lifting table 44 is disposed above the lifting table 44.
A balance cylinder 48 is installed near the. Furthermore, a cover member 50 for protecting the motor 46 and balance cylinder 48 is attached to the lifting table 44.

A head holder 52 is attached to a side surface of the elevating table 44, and a turret head 54 is detachably attached to one side surface of the head holder 52. Cutting tools 58 are attached to the turret heads 54 via tool holders 56, respectively. An index motor 60 is attached to the upper part of the head holder 52, and by driving the index motor 60, the hood 54 to the turret is rotated in the direction of arrow A, thereby cutting the desired cutting tool. It is configured so that the user can select and approach the work.

On the other hand, a motor 62 is attached to the other side of the main body 36. A rotational drive shaft (not shown) of this motor 62 extends toward the head holder 52, and when the motor 62 is rotationally driven, the holder of the turret head 54 attached to the head holder 52 is rotated. A cutting tool 58 is configured to rotate in the direction of arrow B via 56.

The base 1 is separated from the first processing device 14 by a predetermined distance.
2, a second processing device 16 is disposed symmetrically with the first processing device 14. In this case, the second processing device 16 is configured in substantially the same manner as the first processing device 14, and therefore, the reference numerals denoting the same components will be appended with a and detailed explanation thereof will be omitted.

In addition, in the figure, reference numeral 64 indicates a limit switch,
This limit switch 64 is for detecting the displacement of the lifting table 44 in the direction of arrow Y, and also,
In the figure, reference numeral 66 indicates a cover member for protecting the sliding parts etc., and this cover member 66 is the first processing device 1.
4 and the second processing device 16 so as to be expandable and contractible.

Next, the turret head exchange device 18 will be described in detail below.

As shown in FIGS. 3 and 4, the turret head exchange device 18 includes a magazine frame 70 that abuts one side of the base 12. As shown in FIGS. In this case, the magazine frame 70 has a substantially U-shape, and a recess 70a is formed in the magazine frame 70 to engage one end of a swing arm, which will be described later. Stopper blocks 72a and 72b are provided at the bottom of this recess 70a.

On the other hand, above the magazine frame 70 is a reduction gear 74.
A swing arm 76 for swinging the swing arm is attached via the swing arm. The rotary shaft of the reducer 74, which rotates to reduce its rotational speed under the driving action of the swing motor 76, extends in the direction of arrow z1, and a worm gear 78 is attached to the tip thereof. . A worm wheel 80 meshes with the worm gear 78 . In this case, the swing arm 82 consists of a first arm 82a and a second arm 82b that have a substantially bent shape,
The worm wheel 80 is disposed at a bent portion where the first arm 82a and the second arm 82b are connected.

The worm wheel 80 and the swing arm 82 are supported by a shaft 84 bridged over the upper end of the magazine frame 70. Therefore, it is easily understood that the worm gear 78 and the worm wheel 80 are rotated under the driving action of the swing motor 76, and thereby the swing arm 82 is rotated about the shaft 84.

Therefore, as shown in FIG. 4, one end of the second arm 82b extends downward from the bending part and is bent, and when the tip thereof swings and descends, the magazine frame 70 It enters the recess 70a. A shock absorber 86 that contacts a stopper block 72a disposed within the magazine frame 70 and a stopper pin 88 that contacts a stopper block 72b are attached to one end of the swing arm 82.

On the other hand, the first arm 8 constituting the swing arm 82
2a is formed with a bulge 90 that protrudes in a substantially triangular shape in the middle thereof, and a pair of shock absorbers 92a extend from the bulge 90 toward the distal end in opposite directions. , 92b are attached. In this case, the expansion angle of the shock absorbers 92a, 92b is selected to be approximately 90''.

Next, stopper pins 93a and 93b are provided near the back surfaces of the shock absorbers 92a and 92b, respectively, substantially parallel to the shock absorbers 92a and 92b (see FIG. 5). In this case, a rotating means 94 for rotating a head magazine section, which will be described later, is attached to the other end of the first arm 82a. A drive motor 96 for driving the rotation means 94 is connected to the bulge 90 of the swing arm.
The rotary drive shaft 96a of the motor 96 engages with one end of the connecting member 98. The other end of the connecting member 98 extends toward and near a gear case 100 that constitutes the rotating means 94 and is substantially attached to the tip of the swing arm 82 . The gear case 100 includes a first cylindrical portion 102 having a relatively small diameter;
A second cylindrical portion 1 having a considerably larger diameter than the first cylindrical portion 102 and disposed orthogonally to the first cylindrical portion 102.
04 to form the respective cylindrical portions 102 and 104.
It has a shape that communicates the internal space formed between the two.

In this case, a proximity switch 108 is attached to the outer circumferential surface of the first cylindrical section 102 via a bracket 106, and an air cylinder 108 is attached to the outer circumferential surface of the second cylindrical section 104.
10 is attached. In FIG. 5, the cylinder loft 110a of the air cylinder 110 is configured to be movable in a direction perpendicular to the drawing.

Bearing members 112 and 114 are fitted near both ends of the first cylindrical portion 102 constituting the gear case 100, and lid members 1 are fitted on both end surfaces of the first cylindrical portion 102.
16.118 is attached. Furthermore, the first cylindrical portion 1
A worm shaft 120 rotatably held by the bearing members 112 and 114 is disposed within the worm shaft 120. One end of the worm shaft 120 passes through the lid member 116 , projects outward from the gear case 100 , and engages with the other end of the connecting member 98 . A worm gear 122 is fitted onto an intermediate portion of the worm shaft 120, and a worm wheel 124 disposed within the second cylindrical portion 104 meshes with the worm gear 122. The worm wheel 1
24 has a cylindrical portion 124a formed approximately in the center thereof, and a support shaft 126 is fitted into the cylindrical portion 124a.

As shown in FIG. 6, one end surface of the second cylindrical portion 104 of the gear case 100 is closed by a lid member 128, and a recess 128a is defined at approximately the center of the lid member 128. A bearing member 130 is fitted in the . On the other hand, a bearing member 132 is fitted into the other end of the second cylindrical portion 104, and a lid member 134 that comes into contact with the bearing member 132 is attached to the other end surface of the second cylindrical portion 104. Second cylindrical part 104
The opening on the other side is closed. In this case, the hole 12 formed approximately in the center of each of the lid members 128 and 134
8b and 134a and the holes 130a, 132a of the bearing member 130.132 are formed coaxially, and these holes and the cylindrical portion 124 of the worm wheel 124
The support shaft 126 is rotatably disposed through the hole a.

One end surface 126a of the support shaft 126 is shown in FIG.
It protrudes downward from one end surface of the gear case 100, and a first head support arm 136 is fixed to one end surface 126a of the support shaft 126.

In fact, when fixing the first head support arm 136, a boss member 138 provided approximately at the center of the first head support arm 136 is utilized.

On the other hand, the other end 126b of the support shaft 126 is connected to the gear case 1.
A second head support arm 140 protrudes upward in the figure from the other end surface of the support shaft 126, and a second head support arm 140 is connected to the first head support arm 13 at the other end 126b of the support shaft 126.
6, they are integrally fixed via a boss member 142.

The first head support arm 136 and the second head support arm 140 have substantially the same shape.

That is, as shown in FIGS. 3 and 4, the first head support arm 136 and the second head support arm 140
includes arm portions 136a, 136b and arm portions 140a, 140b extending in directions away from each other from the respective boss members 138, 142;
, 136b and bulging portions 136c, 14 that bulge out in a substantially triangular shape in a direction perpendicular to the arm portions 140a, 140b.
0c is formed. the first head support arm 13;
An engaging member 144 for engaging with the cylinder rod 110a of the air cylinder 110 attached to the gear case 100 is attached to the arm portion 136b of No. 6 via a mounting member 144a.

Further, the arm portion 14 of the second head support arm 140
A bolt 146 for operating the proximity switch 108 attached to the gear case 100 is installed at 0b. The first head support arm 136 and the second head support arm 140 have a first stopper block 148 suspended between arm portions 136b and 140b, and a first stopper block 148 suspended between bulges 136c and 140c. 2 stopper blocks 150 are disposed (see FIGS. 4 to 6).
(see figure). Further, each arm portion 136a of the first head support arm 136 and the second head support arm 140 is
, 136b, 140a, and 140b have a first
Fourth head clamp mechanisms 152a to 152d are provided.

In this case, the fourth head clamp mechanism 152a
152d to 152d are constructed in substantially the same way, therefore, the details of the first head clamp mechanism 1528 will be explained here, and the details of the second to fourth head clamps altJ1152 will be explained here.
For b to 152d, the reference numerals indicating the same components as those of the first head clamp mechanism 152a are given numerals, c and d, respectively, and detailed explanation thereof will be omitted.

That is, the first head clamp mechanism 1528, as shown in FIGS. 7 and 8, has a hollow support body 154.
a, and the support member 1 is provided on the outer peripheral surface of the support body 154a.
56a is integrally fixed. A proximity switch 160 is mounted on one side of the support member 156a via a plate 158a.
a is attached.

On the other hand, positioning means 162a for positioning the head clamp mechanism 152a is provided on the other side surface of the support member 156a. That is, the positioning means 162a is a cylinder 164a that is attached to the support member 156a and has a space inside thereof consisting of a large diameter part and a small diameter part.
A guide member 166a is attached to one end of the cylinder 164a.

The guide member 166a has a cylindrical shape with a flange portion that bulges out to close the opening of the cylinder 164a, and when one end side of the guide member 166a fits into the large diameter portion of the cylinder 164a, The guide member 1 is opened inside the guide member 166a.
The hole passing through 66a and the large diameter part and small diameter part of cylinder 164a are arranged coaxially.

Therefore, the hole of the guide member 166a and the cylinder 16
A rod member 168a that passes through the respective holes fits into the large diameter portion and the small diameter portion of 4a. The rod member 16
One end of the cylinder 8a protrudes from one end of the small diameter portion of the cylinder 164a and extends in the direction of arrow C. The other end of the rod member 168a protrudes from the guide member 166a in the direction of the arrow, and has a handle 17 at its end.
0a is attached.

The cylinder 16 is located in the middle part of the rod member 168a.
A ring member 172a is provided for sliding within the large diameter portion of 4a, and a coil spring 174a is disposed between this ring member 172a and the guide member 166a. Furthermore, a bottle member 176a for operating the proximity switch 160a is disposed near the other end of the rod member 168a.

On the other hand, an angle member 178a is attached to the outer peripheral surface of the hollow support body 154a.
Proximity switches 180a and 182a are attached to the ends of the. Note that a bearing member 184a is fitted inside the hollow support body 154a, and the bearing member 184a is fitted inside the hollow support body 154a.
A cylinder 186a fits into 84a.

In this case, the cylinder 186a is substantially composed of a small-diameter cylindrical portion 188a and a large-diameter cylindrical portion 190a. The small diameter cylindrical portion 188a and the large diameter cylindrical portion 190a
There is a protrusion 192 that protrudes inward and rotates around the joint part.
a is formed, and a circumferential groove 194a for engaging a coil spring, which will be described later, is defined on the side surface of the protrusion 192a on the cylindrical portion 188a side.

A retaining member 196a that prevents the cylinder 186a from being removed is fitted onto the outer peripheral surface near the end of the cylinder 186a configured as described above on the side of the small diameter cylindrical portion 188a. The retaining member 196a has a ring shape with a stepped portion, and the end portion of the retaining member 196a on the small diameter side is in contact with the bearing member 184a.

On the other hand, on the circumferential surface of the large-diameter side of the retaining member 196a, the rond member 168a engages with a detent hole 198a into which the tip of the rond member 168a constituting the positioning means 162a fits. Multiple engagement recesses 200a
is formed (see Figure 8).

Further, a lid member 202a is attached to one end surface on the side of the small diameter cylindrical portion 188a, and in this case, the lid member 202a
One end of 02a is fitted into the small diameter cylindrical portion 188a.

A small diameter cylindrical portion 188a that constitutes the cylinder 186a.
A piston 204a is slidably fitted inside. That is, a flange portion 206a is formed on one end side of the piston 204a, and an O-ring 208a is engaged with a circumferential groove defined on the outer peripheral wall surface of the flange portion 206a, thereby opening a chamber within the cylindrical portion 188a. First chamber 210a
and a second chamber 212a.

The first chamber 21 is located at one end side surface of the piston 204a.
A pipe body 214a for supplying pressure fluid is connected to 0a, and the other end side of the pipe body 214a is connected to the first chamber 210a.
The rotary joint 222a protrudes outwardly through a hole formed in the approximate center of the lid member 202a.
It is connected to the flexible pipe 224a via.

This flexible pipe 224a is connected to a pressure supply source (not shown).

The tubular body 214a communicates with the first chamber 210a through a passage 216a and a passage 218a. Said tube body 214a
Near the other end are the proximity switches 180a, 182.
A disk-shaped plate body 220a is attached for operating a.

On the other hand, a coil spring 22 is provided in the second chamber 212a.
6a is arranged. In this case, the coil spring 2
One end side of 26a is the flange portion 2 of the piston 204a.
06a, and the other end is seated in a circumferential groove 194a formed in the rotating protrusion 192a. The other end of the piston 204a has a small diameter and can freely protrude into the large diameter cylindrical portion 190a of the cylinder 186a through a hole formed by the projection 192a.

A first claw member 228a and a second claw member 230a are disposed near the tip of the small diameter portion of the piston 204a, and the displacement of the piston 204a causes the claw members 228a, 2
30a can be opened and closed. That is, as shown in FIG. 9, a slit 232 is provided at the other end of the piston 204a.
a is defined, and the first slit 232a is
One end side of the claw member 228a and the second claw member 230a are provided. Then, one end portion of the claw members 228a, 230a is engaged with a pin member 234a that spans the slit 232a.

On the other hand, the other end of the first claw member 228a extends in the direction of arrow C, and is bent at a substantially right angle in the middle thereof. A pin member 238a passes through a hole 236a provided at a bent portion of the first claw member 228a.

Next, the other end side of the second claw member 230a extends in the direction indicated by the arrow, and along the way, it bends toward the outside like the first claw member 228a. A pin member 242a passes through a hole 240a provided at a bent portion of the claw member 230a.

Therefore, the first head clamp mechanism 152a is connected to the flexible pipe 224a from a pressure fluid supply source (not shown).
The piston 204a is displaced in the direction of arrow E by supplying pressurized fluid into the first chamber 210a through the low rigidity joint 222a and the tube body 214a, and under the displacement action of the piston 204a, the first pawl member 228a and the first pawl member 228a and 2
The claw member 230a opens and closes in the direction of the arrow F and the direction of the arrow G, respectively, using the pin members 238a and 242a as fulcrums.

The turret type machine tool incorporating the turret head exchange device according to the present invention is basically constructed as described above, and its operation and effects will be explained next.

First, in the state shown in FIG. 1, the turret type machine tool IO is driven to perform desired machining on a workpiece (not shown). That is, the motors 20 and 34 are driven to displace the first processing device 14 in the arrow X direction and the arrow Z direction, and stop it at a predetermined position. Next, the ζ motor 46 is driven to displace the lifting table 44 in the direction of arrow Y, and the index motor 60 is driven to rotate the talent head 54 in the direction of arrow A to select a desired cutting tool 58. Similarly to the first processing device 14, the second processing device 16 is also displaced in the arrow X direction, arrow Y direction, and arrow Z direction, stopped at a desired position, and drives the index motor 0a to move the turret head 54a. Rotate in the direction of arrow A to select a desired cutting tool 58a.

Next, after driving the motors 62.62a of the first processing device 14 and the second processing device 16 to rotate the selected cutting tools 58.58a in the direction of arrow B, each processing device 14.16 is displaced in a desired direction in the directions of arrows X, Y, and Z, and a predetermined process is performed on a workpiece (not shown). At this time, it is of course possible to drive the index motor 60, 60a and select another cutting tool 58, 58a after once interrupting the cutting process if necessary.

By the way, in this way, the first processing device 14 and the second processing device 16 are removed in order to perform another processing after performing a predetermined processing on the workpiece, or due to an accident such as breakage of a cutting tool. The turret head 54 is attached to the turret head 54.
54a will need to be replaced.

Therefore, the rad 54, 54a of the turret is replaced by the turret head replacement device 18 according to the present invention. This replacement work will be explained in detail below.

First, in the state shown by the solid line in FIG. 5, the turret head 25 replacing the turret head 54, 54a is
0a, 250b to the turret head exchange device 18
The first to fourth head clamp mechanisms 152a that constitute the
to 152d, the first head clamp mechanism 1528 and the third head clamp mechanism 1520 are respectively attached.

In this case, the first head clamp mechanism 152a and the third head clamp mechanism 152C have substantially the same function for holding the substitute turret head, and therefore, the function of the first head clamp mechanism 1528 will be described here. , the description of the third head clamp mechanism 1520 will be omitted.

As shown in FIG. 7, the first head clamp mechanism 152a
An engagement portion formed on one side of the turret head 250a is positioned between the claw members 228a and 230a that constitute the turret head 250a. At that time, the claw members 228a, 230a are
As shown by the two-dot chain line in FIG. 7, it is stopped while being swung in the direction of arrow F and the direction of arrow G. That is,
The flexible vibe 22 is supplied from a pressure fluid supply source (not shown).
4a, and the first
Pressure fluid is supplied into chamber 210a. This pressure fluid generates a load in the direction of arrow E on the piston 204a that defines the first chamber 210a, and this load resists the elastic force of the coil spring 226a disposed in the second chamber 212a. , the piston 204a is displaced in the direction of arrow E. Accordingly, one end side of each claw member 228a, 230a that is engaged with the other end side of the piston 204a via the pin member 234a is displaced in the direction of arrow E,
The other end sides of each of the claw members 228a, 230a rotate in the direction of arrow F and the direction of arrow G using pin members 238a, 242a as fulcrums, respectively, and stop at a position indicated by a two-dot chain line in the figure.

Next, in this way, the first and second claw members 228a,
The engaging portion of the turret head 250a disposed between the turret heads 230a is clamped and held by the respective claw members 228a and 230a. That is, the pressure fluid supplied into the first chamber 210a is passed through the passages 218a, 21 in the opposite direction.
6a, a low rigidity joint 222a, and a flexible pipe 224a.

As a result, the piston 204a is displaced in the opposite direction under the pressing action of the coil spring 226a. Therefore, the tips of the first claw member 228a and the second claw member 230a that engage with the other end of the piston 204a rotate in a direction toward each other, and as shown by solid lines in FIG. 7, the turret head 250a is held by the head clamp mechanism 152a.

Next, a desired cutting tool is attached to a cutting tool holder (not shown) of the turret rod 250a held by the first head clamp mechanism 152a.

In this case, the turret head 250a! The respective claw members 228a and 230a held are connected to the cylinder 186a in which the respective claw members 228a and 230a are disposed.
At the same time, it is rotatable by the action of the bearing member 184a. Therefore, when attaching a desired cutting tool to the turret head 250a, the turret head 250a can be rotated and displaced to a position where the cutting tool can be easily attached.

At this time, the handle 170a of the positioning means 162a constituting the first head clamp mechanism 152a is displaced in the direction of the arrow, and the cylinder 186a is rotated while the positioning means 162a is released from the restraint.

Note that the rod member 168a of the positioning means 162a
In addition to a rotation prevention hole 198a, an engagement recess 200a with which the rod member 168a engages is defined on the outer peripheral surface of the retaining member 196a, which the distal end of the retaining member 196a faces.

Therefore, when the rod 250a is rotated to the turret, the rod member 168a is inserted into the engagement recess 200a.
are engaged, thereby causing the turret head 250a to
can be stopped at a suitable position.

After the desired cutting tool is mounted in this manner, the cylinder 186a is rotated to secure the tip of the rod member 168a of the positioning means 162a to the retaining member 196a.
The cylinder 186a enters a rotation prevention hole 198a formed in the cylinder 186a, thereby preventing further rotation of the cylinder 186a. At this time, the rod member 1 of the positioning means 162a
68a enters the detent hole 198a for a predetermined length, and the pin member 176 is attached to the rod member 168a.
Proximity switch 160a indicates that a has been displaced to a predetermined position.
is detected, and this detection signal enables the displacement operation of the swing arm 82 that constitutes the turret head exchange device 18.

As described above, after the new turret heads 250a and 250b are attached to the first head clamp mechanism 152a and the third head clamp mechanism 1520, the swing arm 82 is moved from the position shown by the solid line in FIG. Displace to position. That is, the swing arm 82
A swing motor 76 is driven to rotate a worm gear 78 attached to the swing motor 76 via a reduction gear 74 in a predetermined direction. Under the rotational action of the worm gear 78, the worm wheel 80 rotates around the shaft 84.
The swing arm 82, which is integrally fixed to the worm wheel 80, rotates by a predetermined amount. In this case, since the second arm 82b is provided at one end of the swing arm 82, the weight of the first arm 82a and be exposed.

Next, among the first to fourth head clamp mechanisms 152a to 152d disposed at the tip of the swing arm by driving the first processing device 14 and the second processing device 16, the second head clamp mechanism 152b and The fourth head clamp mechanism 152d has turret heads 54 and 54, respectively.
engage a.

Next, in the same manner as the first head clamp mechanism 152a, the second head clamp mechanism 152b and the fourth head clamp mechanism 152d hold the turret heads 54, 54a, respectively, and the first processing device 14 and Head holder 52 of second processing device 16
and releasing the holding means (not shown) of 52a to
The processing device 14 and the second processing device 16 are displaced in a direction away from each other and put on standby. As a result, the turret rods 54, 54a are securely held by the second head clamp mechanism 152b and the fourth head clamp mechanism 152d, respectively.

Next, the first head support arm 136 and the second head support arm 140 of the turret head exchange device 18 are replaced.
is rotated approximately 1806 times around the support shaft 126. That is, the first and second head support arms 136.1
The cylinder rod 110a of the air cylinder 110 is driven by driving the air cylinder 110 that is preventing rotation of the air cylinder 40.
The engaging member 1 attached to the first head support arm 136
The vapor is devolatilized from the concave portion of 44. In this way, the first head support arm 136 and the second head support arm 14
0 rotation is possible.

Next, the motor 96, which is the drive source of the rotation means 94, is driven. Under the driving action of this motor 96, a rotating drive shaft 96a,
A worm shaft 120 and a worm gear 122, which are disposed in the gear case 100, rotate via the connecting member 98. Therefore, the worm wheel 124 meshing with the worm gear 122 rotates in the direction of the arrow shown in FIG. comes to rotate. When the first head support arm 136 and the second head support arm 140 rotate approximately 180 degrees, the first stopper block 148 bridged over the respective head support arms 136 and 140 moves into the shock absorber 92.
b.

Next, the first head support arm 136 and the second head support arm 140 are brought into contact with the stopper bin 93b arranged in parallel near the shock absorber 92b without impact.
stops at a predetermined location. As a result, new turret heads 250a and 250b are placed opposite to each other between the first processing device 14 and the second processing device 16.

Next, the first processing device 14 and the second processing device 16 are displaced in a direction toward each other, and the turret heads 250a and 250b are attached to the head holders 52 and 52a of the first processing device 14 and the second processing device 16, respectively. At the same time, the first head clamp mechanism 152a and the third head clamp mechanism 152c of the turret head exchange device 18
The turret head 25 is supplied with pressure fluid to the inside of the turret head 25.
Release the clamps of 0a and 250b.

In the above operations, the first processing device 14 and the second processing device 16 are provided with a new turret head 250a,
250b are respectively attached. Then, the swing arm of the turret head exchange device 18 is connected to the swing motor 7.
6, it is displaced from the position shown by the two-dot chain line to the position shown by the solid line in FIG. In this case, a shock absorber 86 and a stopper bin 88 are attached to the other end of the swing arm 82, and after the shock absorber 86 comes into contact with a stopper block 72a disposed within the magazine frame 70, the stopper bin 88 is attached to the other end of the swing arm 82. 88
comes into contact with the stopper block 72b, and the displacement movement of the swing arm 82 can be stopped without impact.

Next, the drive units of the first processing device 14 and the second processing device 16 of the turret type machine tool 10 are driven to perform a predetermined cutting process on a workpiece (not shown) in the same manner as described above.

As described above, according to the present invention, in a turret head exchange device for exchanging 1 m long turret heads that are attached to a turret type machine tool so as to face each other, the turret head exchanger is provided at a substantially central portion of the turret type machine tool. A frame member is provided on the base so as to be located at the rear. Further, a swing arm is provided at the upper end of the frame member and is movable between the sets of turret heads, a motor is attached to one end of the swing arm, and a rotational drive shaft of the motor is provided. A worm gear is engaged with the worm gear, and a worm wheel meshing with the worm gear is held by a support shaft rotatably engaged with the swing arm, and a pair of head support arms are disposed on the support shaft. There is. Furthermore, a head clamp mechanism is attached to each end of the pair of head support arms.

With this configuration, first, a new turret head is attached to the head clamp mechanism of one of the pair of head support arms, and the swing arm is rotationally displaced. Next, after holding the turret head attached to the turret-type machine tool by the remaining head clamp mechanisms of the pair of head support arms, the motor is driven, and the worm gear, worm wheel, and support shaft are driven by the motor. The turret head is replaced by rotating the head support arm through the turret head. Therefore, the work of replacing one set of turret heads attached to the turret-type machine tool with a new set of turret heads can be accomplished at once with the turret head changing device alone, and the turret head can be replaced. The effect is that it becomes possible to perform work efficiently.

Although the present invention has been described above with reference to preferred embodiments, the present invention is not limited to these embodiments, and various improvements and changes in design can be made without departing from the gist of the present invention. Of course.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of a turret-type machine tool equipped with a turret head exchange device according to the present invention, FIG. 2 is a front view of the turret-type machine tool shown in FIG. 1, and FIG. 3 is a turret according to the present invention. FIG. 4 is a side view of the turret head exchange device according to the present invention; FIG. 5 is a partially sectional side view showing one end of the swing arm constituting the turret head exchange device according to the present invention. 6 is a partially sectional plan view showing one end of the swing arm shown in FIG. 8 is a partially omitted side view of the head clamp mechanism shown in FIG. 7, and FIG. 9 is a partially omitted explanatory view showing one end of the head clamp mechanism shown in FIG. 7. 10... Turret type machine tool 12... Base 14.16... Processing device 18... Turret head exchange device 52... Head holter 54... Turret head 5
8... Cutting tool 70... Magazine frame 82... Swing arm 94... Rotating means 1
00...gear case

Claims (3)

[Claims] (1) A device for exchanging a set of turret heads attached to each of a set of turret-type machine tools arranged at a predetermined interval, the turret head exchange device A swing arm rotatably pivoted to a frame member corresponding to the central space and disposed near the machine tool, a rotational drive source attached to the swingarm, and a rotational drive source of the rotational drive source. a worm gear connected to a rotational drive shaft; a worm wheel fitted with a support shaft that meshes with the worm gear and rotatably engages the swing arm; a pair of head support arms fixed to the support shaft; A turret head exchange device comprising a plurality of head clamp mechanisms attached to the head support arm to hold the turret head. (2) In the device according to claim 1, the swing arm to which the pair of head support arms is rotatably mounted substantially consists of a first arm and a second arm;
The swing arm is supported by a frame member at an intermediate portion thereof, the first arm has the pair of head support arms and a head clamp mechanism, and the second arm has a head clamp mechanism.
A turret head exchange device in which the arm is configured to function as a balancer member having a predetermined weight corresponding to the weight of the head support arm of the first arm and the head clamp mechanism. (3) In the device according to claim 1 or 2, the head clamp mechanism for holding the turret head includes a set of pawl members provided corresponding to the engaging portion of the turret head, and the pawl member. A turret head exchange device consisting of an actuator that opens and closes members.