JPS6316908A - Machine tool of multi-spindle head exchange type - Google Patents

Abstract

PURPOSE:To enable the application of many types of multi-hole processes to many types of workpieces by providing carriages at both sides of a head stock for so loading spindle heads as to be shiftable, installing a carriage bed at the back thereof for storing spindle heads in a plurality of rows and shifting the heads to the head stock in order. CONSTITUTION:Storage carriages 21-1 and 21-2 are loaded with spindle heads and a primary spindle head is moved to the front of a head stock on a shift device 9 for mounting thereto. In the course of machining, the spindle heads on the carriage 21-1 are made to advance and the last spindle head on the carriage 21-2 is transferred to the last position on the carriage 21-1 via a shift device 11. After machining, the primary spindle head is transferred to the carriage 21-1 via a shift device 9. In the course of machining with the 4th spindle head, the 7th spindle head together with the 5th, the 6th, the 8th and the 9th spindle heads is made to advance from the storage device 25-3 of a carriage bed 24, the primary, the secondary and the tertiary spindle heads on the carriage 21-2 are retreated and the primary spindle head is shifted to the foremost position on a storage device 25-1. By carrying out the aforesaid process cyclically, many types of multi-spindle holes are efficiently machined with many types of spindle heads.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a machine tool of the type with multiple shaft exchangeable shaft heads.

[Conventional technology]

When drilling many and various types of holes in one workpiece, or even when there are many types of workpieces, use a single-axis machining machine with an automatic tool change system (so-called machining center) or a transfer machine with a multi-axis unit. was.

[Problem that the invention seeks to solve]

As in the prior art, axle-shaft machine tools such as machining centers are highly flexible in terms of the number of tools used, types of machining, and types of workpieces, but they have the disadvantage of increasing the number of steps and low productivity, or In order to improve efficiency, the process must be divided (it has the disadvantage of increasing the number of machine tools).

In addition, when using a multi-axis unit, productivity is higher than an axle-axis machine tool in terms of the number of tools, that is, the number of holes to be machined. Since the multi-spindle heads must be replaced and the replacement work is not easy, there is a drawback in that there is particularly little flexibility with respect to the type of workpiece.

This invention reduces the number of steps, does not increase the number of machines, and facilitates tool replacement when drilling many and many types of holes, and furthermore when there are many types of workpieces, and is an improvement over the above-mentioned conventional technology. The purpose is to provide a machine tool that eliminates the drawbacks.

[Means for solving problems]

The machine tool according to the present invention is a multi-spindle machine tool having a multi-spindle head, a so-called gearing head (hereinafter referred to as a "spindle head"), and includes a headstock that is slidable on the head on a base and a front surface thereof. The machine tool body consists of the workpiece table located at the top of the headstock and the spindle head transfer device located behind the back of the headstock. It is provided on the front surface of the shaft stock and on the shaft head transfer device.

Then, the machine tool C11 is provided with means for storing and storing a plurality (various types) of shaft heads vertically and (31rz in a direction parallel to the spindle axis) and for intermittently transporting the shaft heads in the longitudinal force direction. Storage tables 11r are provided on both sides of the machine body.

Furthermore, behind the machine tool main body and shaft head storage stand,
The shaft head transfer stage 1 is arranged in a position relative to the shaft head storage table in the lateral direction (a shaft head 1 general feeding table is provided which is equipped with arranged shaft head storage devices and is movable in the lateral direction). ing.

Thus, a plurality (various types) of shaft heads are mounted except for at least one or two devices in the shaft head storage device row.

[For production]

The shaft head 1 on both sides of the machine tool body [; The first generation machine has the required plurality (various types) in order according to the process order and workpiece order... in reverse order.
The shaft heads are arranged 11゛; "stored. Then, the foremost shaft of the shaft heads arranged in order in the force shaft head storage table is placed between the headstock in the retracted position and the workpiece table. The head is moved laterally to the head exchange space, attached to the headstock, and the headstock is moved forward and backward to process the workpiece on the table.

During this time, the shaft heads arranged in order move forward one pinch at a time, and the rearmost shaft head of the shaft heads arranged in reverse order is transferred to the other shaft head storage stand by the head transfer device. The shaft heads arranged in reverse order on the other shaft head storage stand are moved back one pinch at a time.

Then, when the movement of the shaft head and the first machining (first process) are completed, the used shaft head is removed from the head stock and moved to the forefront of the reverse order arrangement on the other shaft head storage stand. Ru.

The operation of the above-mentioned process is carried out in a continuous manner, and the spindle heads of both headstock storage stands -h are sequentially attached to the headstock and applied to one or more predetermined types of workpieces. On the other hand, machining of multiple types of holes with multiple holes is performed in the order of steps.

Furthermore, each row of used shaft heads is sequentially transferred to an empty shaft head storage device on a shaft head conveyor placed behind the machine tool main body, and then transferred to another shaft head storage device on the shaft head conveyor. By sequentially transferring new shaft heads from another row of shaft heads to the empty shaft head storage table, it is possible to respond to the diversification of types of workpieces and types of machining.

〔Example〕

Embodiments of the invention will be described with reference to the drawings.

The machine tool main body 1 is equipped with a workpiece table 3 provided on a base 21 and a shaft head transfer device 65 provided at the rear of the machine 2. 4''- is provided with a headstock 6 that is moved forward and backward by known means such as a screw mechanism and oil pressure R11η.

Number, 1, 輼++n I<: Inner clamping body 7 on the front of the headstock 6
A shaft head shift device 9 is provided on the front surface of the support base and the positioning pin 8, respectively, and the shaft head guide tightening body 7 is operated by a hydraulic mechanism. The shaft head transfer device 5 provided at the rear of the base 2 connects the shaft head support 10 fixed to the base 2 and the base 2.
It is composed of a shaft head shift device 11 attached to the shaft + jQ support base side with a support bracket at an arbitrary location on the base 22 of the single-shaft III storage base.

The upper surface of the shaft head 12 is provided with two recesses (first fourth part 13-1 and second recess 13-2) in which the pawls (transfer) of the shaft head shift devices 9 and 11 engage, and the rear surface of the shaft head 12 has a retaining groove and a positioning hole that engage with the shaft head guide clamping body 7 and the positioning pin 8 on the front surface of the headstock, respectively.

The shaft head 12 is guided by the shaft head guide clamping body 7 and brought to the front of the headstock 6, is positioned by the positioning pin 8, and is brought to the front of the headstock 6 by the hydraulically operated shaft head guide clamping body 7. When fixedly mounted, the main shaft driven by the drive motor of the shaft stock and the tool drive shaft of the shaft head engage with each other.

The shaft head shift device 9 and the shaft head shift device 11 have the same structure and are composed of a rodless cylinder as shown in FIG. 3 and a pawl reciprocated by the rodless cylinder. More specifically, a cylinder 15 and a guide rod 16 are installed in parallel on the frame 14, the cylinder 15 and the guide rod 16 penetrate, and the sliding body 17 that slides on it has two adjacent The claws (first claw 18-.1, second claw 1B-2) are biased in one direction (using a spring, for example) and are swingably provided.

The piston 19 is then housed in the cylinder 15,
It reciprocates inside the cylinder using hydraulic pressure. The sliding body 17 and the piston 19 face each other through the wall of the cylinder 15.
(Equipped with a grinding stone 20 that attracts each other. At that point, oil j1
When the piston 19 reciprocates due to -, 11? Moving object 17
, and the first. The second claw 18-L 18-2 reciprocates.

The shaft head storage stands are fixedly arranged one by one adjacent to both sides of the L machine tool main body 1, and the first shaft head storage stand 21 is placed on the - side.
-1 and the second shaft storage stand 212 placed on the other side have substantially the same structure, the base 22 is equipped with a transfer bar 23, and a plurality of (not shown) (3 pieces in the example)
The shaft head 12 is indexed and transferred by a predetermined pitch by a transfer bar 23. However, the transfer direction in the double-shaft head storage mounts 21-1 and 21-2 is the forward direction from the rear to the front in the first axial-head storage mount 21-1, and in the forward direction from the rear to the front... −
2, the backward direction is from the front to the rear.

In order to further enhance the functionality of the A1 machine No. J mentioned in Section 2, an axle head carrier 24 can be added as an accessory: i1?1.

As shown in FIGS. 4 and 5 [λ1], behind the machine tool, that is, the machine tool main body 1 having 67N shaft head storage stands 211 and 212 on both sides, and adjacent to it, the shafts in the shaft head storage stands on both sides. A shaft head conveyor 24 is provided which has a group of shaft head storage devices arranged side by side in a direction perpendicular to the head transfer direction, and indexes and moves in the arrangement direction at an arrangement pitch of about 1i of the shaft head storage devices.

Then, the arrangement pitch of the shaft head storage device of the shaft head conveyor is:
Each of the two shaft head storage devices simultaneously operates the first shaft head storage stand 12.
-1 and the second shaft head storage stand 21-2, it is preferable that they are arranged vertically in a straight line.

In the example of FIGS. 4 and 5, the shaft head storage device is located in the first. Second. Third. 4th shaft head storage device 25-1.25-2゜25
-3.25-4, and every other shaft head storage device is the first shaft head storage stand 21-1 and the second shaft head storage stand 21 on both sides.
-2.

The shaft head carrier 24 has, for example, wheels, and a guide 26 provided on the back side of the machine tool body or the base 2.22 of the shaft head storage stand.
The robot moves automatically or immobilely guided by the robot. Then,
Indexing and positioning is performed by engagement with positioning pins 27 provided on the base 22.

It is also possible to separate it from the machine tool body and run it.

Each shaft head storage device 25-1 to 25-4 has the same configuration,
In addition, it has the same structure as the shaft head storage table 4) in principle and 1) in practice. stomach! 1. As is clear from FIG. 5, the transfer bar 23 of the shaft head storage table has three transfer claws that are adapted to engage the three shaft heads, and in the retracted position, the last The transfer claw at the position is adapted to engage with the shaft head located at the tiii position in the shaft head storage device of the shaft head conveying platform 24. On the other hand, the transfer bar 28 of the axle head storage device of the conveyance table 24 has two transfer claws, and the transfer bar 28 has two (っ°ζ
colour.

That is, the transfer bar 23 connects the shaft head storage table 21 and the shaft head conveyance table 2.
We also transfer shaft heads to and from 4. The relationship between these two transfer bars may also be reversed.

Also, although not shown, as a modification of the shaft head conveyor,
The second shaft head storage device 25-2 is attached to the first shaft head 11'i' storage device 25I(7), l', ) There is a model in which the fourth shaft head storage devices 25-4 are stacked on top of each other to form a multilayer structure, and each of them is equipped with a lift device that allows indexing in one soil direction (q).In this case, the shaft head conveyor There is no need for lateral movement of the index, and it is fixed with respect to the base 22, or in the case of a type that can be removed from the machine tool main body etc., a means for positioning and fixing with respect to the base 22 may be provided.

Describe the operation and function of the above machine tools.

First, the rodless cylinder used in the shaft head shift device shown in FIG. 3 will be described.

When the piston 19 inside the cylinder 15 reciprocates within the cylinder 15 due to pressure oil supplied from the left and right sides, the magnet 2 of the piston
0 and the magnet 20 of the sliding body I7 sliding on the cylinder 15
Since the two attract each other through the cylinder wall, the sliding body 17 is pulled by the screw I/N 19 and reciprocates back and forth. That is, the first. The second pawl 184.18-2 also moves back and forth.

Now, the required shaft heads are mounted on each shaft head storage table in a predetermined arrangement.

First, the first shaft head 12-1 and the second shaft head 12-2 are stored in the first shaft head storage stand 21-1 in the order of the first process from the front to the back.
, the third shaft head 12-3 is mounted, and the second shaft head storage stand 21-2
4th from back to front. Fifth. 6th each axis rt1st 2-4
Equipped with ~6.

This shaft head group may be arranged in order for six processes on one workpiece, or the first to third shaft heads 12-1 may apply pressure for three processes on one workpiece. 1 to 3 are processed for one workpiece A [4), 4th to 6th shaft heads 124 to are prepared for processing the next different type of crop B, respectively 4),
stomach.

Similarly, the third and fourth shaft head storage devices 25-3.25-/l of the rtt transport platform 24 are
Load them one by one in the desired order, and place the other 1. 2nd shaft head storage 1
The substitute devices 25-1 and 25-2 are left empty for replacement.

Then, Suke Roy 1 Jit outfit ;l'/! l sliding body 1
7. In addition, the claw 21 is attached to the first shaft 11f port 1;= platform 2+
1 by hydraulic drive. Then, the first one! f”
The second pawl 18-2 engages with the first four portion 13-1, which is a portion of the first shaft head 12-1 at the forefront of the storage warehouse 21-1. Next, the first shaft head 12-14 is moved forward by the hydraulic drive of the slide/auxiliary body 17.
J: Move to the shaft head exchange space 11; At this time, the height of the shaft head of the shaft head storage table is such that the retaining groove on the back side engages with the shaft head guide clamping body 7 of the headstock in a side-sliding manner. The support and the guide support of the shaft head guide clamping body 7 work together to smoothly move the first shaft head 12-1 to the shaft head exchange space. First shaft head 12-1
The first shaft head 12- is tightened by the hydraulic actuation of the shaft head guide clamping body 7 engaged with the retaining groove on the back surface of the shaft head and the positioning action of the positioning pin 8 which is engaged with the positioning hole of the first shaft head. 1
is accurately mounted on the headstock 6, and the main shaft driven by the drive motor of the headstock engages with the tool drive shaft of the first shaft head.

Then, the workpiece is machined in the first step by moving the headstock 6 forward and backward.

In the meantime, the transfer bar 23 of the first shaft head storage stand 21-1 is
l pitch forward, and the second and third shaft heads 12-2.12-2
moves forward, and at the same time the second shaft head storage stand 21-2. , the fourth shaft head 12-4 at the rearmost position is sent to the rearmost position of the first shaft head storage stand by the shaft head shift device 11 of the shaft head transfer device 5.

At this time, the shaft head shifting device 11 first engages the second pawl 18-2 with the second fourth portion 13-2 of the fourth shaft head 12-4, and then first engages the shaft head support base of the shaft head transfer device 5. 10, and once retreated, the first pawl 18-1 is then engaged with the side surface of the fourth shaft head 12-4, and the shaft head is sent to the first shaft head storage stand 21-1.

Then, the transfer bar 23 of the second shaft head storage stand 212 moves back by one pitch, and the fifth. First, the shaft head retreats.

Eventually, when the first ball movement by the first shaft head 12-1 is completed,
The shaft head guide clamping body 7 advances to release the first shaft head 12-1 from the headstock 6, and the sliding body 20 of the shaft head shift device 9 retreats to move the first pawl 18-1 to the first shaft head 12-1. 2nd on the side of shaft head 12-1
The pawls 182 are respectively engaged with the first four parts 13-1 of the second shaft head 12-1, and the first shaft gItl 2-1 is moved forward again.
The second shaft heads 12-2 are simultaneously sent to the head exchange space at the forefront of the shaft head storage stand 21-2.

Six types of shaft heads can be sequentially used by performing the above-described shaft head exchange operations and actions cyclically.

Furthermore, if the shaft head carrier 24 placed behind the machine tool body is used, the types of shaft heads that can be used are doubled.

We will discuss its operation and effects.

Now, each of the third shaft head storage device 25-3 and the empty first shaft head storage device 25-1 of the shaft head transfer table 24 is transferred to the first shaft head storage device 25-3.
1-1 and the second shaft head storage stand 21-2, respectively. Position the L-axis head carrier 24 (see FIG. 4).

In the action and operation of the shaft head exchange described above, the fourth shaft head 12-
4, while the machining is being carried out, the first shaft head storage stand 21
-1 transfer bar 23 moves forward, causing the shaft head transfer platform 2
The seventh shaft head 12-7 at the forefront of the third shaft head storage device 25-3 of No. 4 is stored in the fifth shaft head. It is advanced together with the sixth shaft head 12-5 and 12-6. That is, the seventh shaft head 12-7 is the first shaft head storage stand 2.
Moved to the last position of 1. At the same time, the third shaft head storage device 25
-3 No. 8. The ninth shaft head 12-8.12-9 is the transfer bar 2
8 moves forward by l pitch.

On the other hand, the transfer bar 23 of the second shaft head storage stand 21-2 is moved backward, and the transfer bar 23 of the second shaft head storage stand 21-2 is moved backward. Second. 3rd shaft head 12-1.12-2.12-
3 retreat all at once. That is, the first shaft head 12-1 is moved to the frontmost position of the first shaft head storage device 25-1 of the shaft head conveyor 24.

As the subsequent steps are followed, the first storage device 25 =
1 transfer bar 28 transfers the first shaft head 121. Second shaft head 12
-2 on the first shaft head storage device 21-1.

Then, the -C stage progresses, and the seventh shaft head 12-7 performs the processing. The fourth shaft head storage device 25-4 and the empty second shaft head storage device 25-2 are connected to the first
Axial head storage stand 21-1 and second holder + rrr storage stand 21-2
Do not repeat the above-mentioned shaft head exchange movement.

A total of 12 types of shaft heads can be sequentially used by changing the shaft head as described above.

The number of shaft heads mounted on the shaft head storage table and each shaft head storage device, and the number of shaft head storage devices on the shaft head transport table can be increased arbitrarily, thereby increasing the types of shaft heads that can be used.

Even in a cycle format in which the shaft head transfer device 5 is not used and only the shaft head transfer table 24 is used, it is possible to exchange the 12 gods, and by using the shaft head transfer table 24, the originally empty shaft can be replaced. It is easy to understand that the loading of 輵+rn onto the head storage table can be carried out automatically.

As a modification of the multilayer shaft jiff II feeder, instead of the lateral indexing movement of the shaft head carrier itself, the lateral indexing movement of the shaft head carrier is performed by the vertical indexing movement of the shaft head storage device. It is clear that the same thing can be done with a type of

〔effect〕

According to the multi-spindle head exchangeable machine tool of the present invention, it is possible to perform various types of hole machining for multiple holes in various types of workpieces with high productivity.

In other words, by using a multi-spindle head, multiple holes can be machined more efficiently than with an axle machining center, and because the shaft head can be replaced more easily and automatically than with conventional multi-spindle units, machine tools can It is possible to efficiently machine many types of holes without requiring a large number of machines, and it is also possible to handle a wide variety of workpieces.

In addition, by using a shaft head conveyor, it is possible to automate the work of loading the shaft heads to be used on the shaft head storage table, and it is also possible to run the shaft heads at the same time so that they can be used at the same time. Once installed and moved to the back of the machine tool body,
Diversification of the shaft heads used has the advantage of reducing the planar size of the body and the operating floor area.

[Brief explanation of the drawing]

Fig. 1 is a side view of the machine tool main body of the 11 soil machine of the present invention, Fig. 2 is a front view of the 18 machine tool of the present invention, and Fig. 3 is the
FIG. 4 is a partially fragmented cross-sectional 1' curved view of the shaft head shift device in the 111"1 machine of the present invention. FIG. 5 is a plan view of the -114'In machine of the present invention. It is a side view of a shaft head storage stand and a shaft head transfer stand in a '-11m machine. 1: Machine tool main body 3: Workpiece table 5: Axis head transfer device; n 6: Headstock 9: Axis head shift device 10: Axle head support stand 11: Axle head shift device 12: Multi-axis axis head 21-17 First axis head storage stand 21-2: Second axis head storage stand 23.28: Transfer bar 24: Axle head conveyance stand 25: Axis head storage device

Claims (1)

[Scope of Claims] A machine tool body including a workpiece table, a headstock, and a spindle head transfer device behind the headstock, a spindle head storage stand disposed on both sides of the machine tool body, the machine tool body and an axle head conveyor disposed behind the axle head storage; the headstock includes an axle head shift device for moving multi-axis axle heads between the axle head storage and the headstock; , Attachment of multi-axis shaft head
detachable; the shaft head transfer device is equipped with a shaft head support and a shaft head shifting device similar to the headstock; the shaft head storage table is equipped with a means for transferring multi-shaft heads; It is equipped with a plurality of multi-shaft heads; the shaft head conveying table is a shaft head storage device in a plurality of rows arranged in a position correlated with the shaft head storage table; A plurality of multi-spindle heads are mounted, and each row of the multi-spindle head is equipped with a shaft head storage device provided with a shaft head transfer means, and is movable in the arrangement direction of the machine tool main body and the shaft head storage stand. A multi-spindle head exchangeable machine tool characterized by the following.