JPS6279935A - Machine tool exchanging multi spindle head with magazine - Google Patents

Abstract

PURPOSE:To narrow the lateral width of a machine tool, by arranging a multi spindle head magazine in the upper part behind while successively feeding a head to a standby position, exchange position and a hoist return position of these multi spindle heads to be exchanged by an exchanging arm and returned to the magazine by a hanging type conveying member. CONSTITUTION:A machine tool is equipped with a turn table 13 of a multi spindle head magazine HM on a horizontal constructing member 9 of a machine frame 12, and an engaging and disengaging member 16 of a multi spindle head is provided on an upper surface of the table 13. And the head on the magazine HM is conveyed by a conveyer C and 17 through a standby position A2 to a part in the vicinity of a head exchange position A3. And and exchanging arm 30, simultaneously clamping the two heads H1, H2 held to a column head 3 retracted to a broken line position and held to the head exchange position A3, vertically inverts the heads. Next the head is conveyed by a conveyer 18 from the exchange position A3 to a hoist return position A4. Subsequently, the head in the hoist return position is returned to the magazine HM by a hanging type conveying member 50. That is, many of the multi spindle heads are exchanged by utilizing vertical space.

Description

Detailed Description of the Invention "Field of Industrial Application" The present invention relates to a multi-spindle head turret type single machine machine, which is equipped with an exchange arm, a suspended conveyor member, and a storage magazine on the top and rear of the machine. The aim is to quickly replace the multi-axis head that corresponds to the workpiece, and to save space on the machine.

"Prior Art and Problems" Conventional multi-spindle head replaceable machine tools have multi-spindle head magazines placed on the left and right sides or on the top of the machine tool. In Canadian systems that require space, and in particular require adjacent placement of transfer machines, it has been necessary to provide a wide space between adjacent units to prevent interference between the transfer machines. For this reason, not only is it not possible to save space, but there is also a possibility that it will not be possible to secure a standby space for the next replacement multi-axis head, forcing the adjacent units to be spaced considerably wide. Since the machine moves forward and backward while resting on the machine, the column unit inevitably becomes larger, which becomes a bottleneck in increasing the speed of the workpiece and shortening the head replacement time.

"Means for Solving Problems R" The present invention has been made in view of the problems listed in L, and utilizes the space above and behind a multi-spindle head exchange machine tool to install a multi-spindle head magazine and this multi-spindle head exchange machine tool.・\A drive member that sequentially moves the head to the rad standby position, head exchange position, and head lifting and return position, a multi-axis on the column head/\exchange arm that exchanges the rad, and a suspension that returns the multi-axis head to the magazine. We succeeded in reducing the width of the machine tool by equipping it with conveyor parts.

This not only saves space for each component and enables high-speed replacement of multi-axis heads for high-speed machining of workpieces, but also enables the machine tools to be arranged with closer spacing on the Tradance Furnace machine line. became. Furthermore,
Since it can be equipped with a large number of multi-axis heads, it has the advantage of being able to provide a multi-axis head exchangeable machine tool with a magazine that can flexibly handle a large number of workpieces at high speed.

That is, it is possible to exchange a large number of multi-axis heads using vertical space rationally. This contributes to making each unit smaller, space-saving, and faster.

``Example'' Next, an example of the present invention will be described with reference to the drawings. 1st
7 to 7 show the structure of the first embodiment, and FIG. 8 shows its operational diagram. First, in Figure 1.2.3, 1
is the bed of the multi-spindle head exchangeable machine tool 100 with a magazine, 2 is a sliding surface, 3 is a column head that rests on the sliding surface and moves in the longitudinal direction of the machine tool (left and right movement in Fig. 1), 4 5 is a locating pin provided between the faces of the column head, and 5 is a latch, which is detachably connected to a retaining portion 6 provided on the back surface of the multi-axis head F11. When the multi-axis head H1 is connected to the column head 3, each axis S on the front side is rotated simultaneously by the drive motor M of the column H1 to process the workpiece W□. 12 is a structural material assembled vertically and horizontally 7.8
, 9, 10..., etc., and the rear (''; rear) number 7 of this horizontal structural member 9 has four sets of multi-axis heads (for example, 1 (,...).

It is equipped with a turntable 13 for a multi-axis head magazine HM on which a multi-axis head magazine HM (H, 116, H,) can be placed, and a multi-axis head engaging/disengaging member (with a conveyor C) 16 is provided.

In addition, IJ is an indexing motor, 14 is a small gear, and 15 is a large gear. Is 17 continuous with the conveyor C of the magazine HM mentioned above? ) A transfer conveyor connects the multi-axis heads H and U to the vicinity of the head exchange position A via the standby position A2. Reference numeral 18 denotes a conveyor that connects the head exchange position in the column to the head return position A4, and is attached to the F end of the vertical structural material 10. Next, regarding the drive member that transports each multi-axis head,
K□ is actuator C7 placed horizontally on vertical structural member 8.
and a hook 20 attached to the tip of the piston rod 19, which connects the multi-axis head on the magazine to the conveyor 17. 2 is sent to each position A2.L. Move the head on A3 to A
1. An actuator C2, which is a member to be transferred to Δ, and which is horizontally arranged on one side of the vertical structural member, is attached to a bracket 21, and a pushing rod 22 is provided at the tip of this piston rod, and each hook 23, 24 Each head is transported in synchronization with 1 by 1. As shown in Fig. 8, C3 is an actuator that can rotate eight times from the solid line to the broken line 2:3' when the push rod 22 is retracted. The lower end bifurcated portion 25 of the rod engages with the protrusion of the push rod 22.

In addition, the exchanging arm 1130 of the 0-order multi-axis head H, H2, etc., in which the pushing rod is supported by several guide rollers 26 that allow it to advance, retreat, and rotate, will be described. The drive box 37 is attached to the tip (left end in FIG. 1) of the horizontal structural member 9. Then, the head exchange position "tl A
3 provides for cuts in the two conveyors 17 and 18. The exchange arm has the column head 3 retreated to the position shown by the broken line and the two multi-axis heads (first
(in the figure), grab them simultaneously and turn them upside down. The detailed configuration of the above exchange arm 30 is described in Section 3.4.7.
As shown in the figure, gripping tools 27, 27 each having a U-shaped cross section are provided for gripping a pair of collar plates a provided at the lower F position of each head H1, H, from the left and right outer sides thereof. 9 A plate 31.3 with a large tip end force of the shaft rods 29, 29 passing through the side wall of the box body 28
It is held inward by the elastic force of springs 32 and 32 that are press-fitted between the two.

33 is a safety device to prevent the multi-axis head from coming off from the exchange arm when the exchange arm 30 is reversed, and locks the cam plates 31 approaching each other in that position by a spring 34. C4 is an actuator that releases each axis head locked to the arm 30, and when the piston rod 35 hits 33, the members 27 and 27 are unlocked, and then the ball 36 in the middle of the rod is released.
separates the cam plates 31, 31 against the spring 32, releasing the two multi-axis heads. Furthermore, the arm drive system for rotating the exchange arm 30 in reverse is as shown in FIG. 1.4. That is, the drive box 37 provided at the rear of the box body 28 has a pivot @38 connected to the box body, and the teeth of this shaft.
(39 meshes with the intermediate gear 40 fixed to the support shaft 41,
A bifurcated lever unit 418 integrated therewith is movably engaged with the tip pin 44i of the lever unit 44 fixed to the drive shaft 43.

Further, a pinion 44b is fixed to the drive shaft 43, and this pinion 44b meshes with the rack 45 of the actuator C1. As shown in FIG. 4, when the rack 45 begins to move forward, the lever unit 44 gradually accelerates the bifurcated lever unit 4La along an acceleration curve, and when it approaches the end of the 180° turn, it decelerates at a deceleration curve. Then, a smooth reverse turn is performed with little impact.

Finally, the suspended conveyance member 5o that returns the multi-axis head H (in FIG. 1) located at the suspended return position A to the magazine HM will be explained. Left and right beams 52, 52 on which two guide rails 51, 51 are laid are horizontally mounted on a part of the frame 12.

A conveyor 53 is mounted on the guide rail, and meshes with a ball screw 55 supported by bearings 54 at both ends of the rail 51. This allows for example the hydraulic motor M at the rear of the machine. The conveyor 53 moves back and forth by the ball screw 55 driven by the rotation of the conveyor 53 . There is an actuator C6 facing downward on the central upper surface of the moving body, and this piston rod 56 hangs down and is connected to a bracket 57 on the lower surface of the carrier. This bracket 57
has a cubic shape and has two guide bars 58°59
is inserted into the bearings 53a and F33a of the carrier 53,
The bracket 57 is moved up and down by the actuator C6. ■The guide bar 58 has a recess 58 below it.
A is provided, and as shown in FIG. 5, when the head I7 is lifted up, it is engaged with and held by the springs 1 to 6o which are pushed by springs 61. This engaged state is maintained while the trochanter 64 is pressed against the inner cam plate 63 of the mounting plate 62 provided along the left side of the 11th surface of the beam body 52.

Note that this lock state is 1 for sections excluding A and A4.
It will be done. Therefore, at A and A4, the lower end bracket 57 of the suspended conveyance member 50 is not locked.
As shown in Figs. 5 and 6, the clamping member 7 of the multi-axis head is
0, the clamp member 7o has two guide bars 65 and 65 connected to the machine tool 1 with respect to the bracket 57.
The guide bars 65 are fixedly passed through the guide bar 65 in a horizontal position in the front-rear direction, and push plates 68, 68 are loosely supported on both sides of the guide bar 65. Stop collars 69 and 69 are fixed to both ends of the guide bar to prevent the guide bar from falling off. An actuator 07 is mounted on one side (the left side in the figure) of the pushing plate 68, and the piston rod 7
] crosses the space of Blaguet 1-57 and is connected to the push plate 68 on the right side. Furthermore, engagement plates 72 and 72 are attached to the lower inner walls of both pushing plates, and these engage plates 72 and 72 are attached to the opposing flange plates 21 and 72, respectively. .

The multi-spindle head H7 is inserted into the gap d' between the two, and the multi-axis head H7 is sandwiched between the pushing plates 68 and 68 in a sandwich-like manner from both the front and rear sides. On the other hand,
When unclamping the multi-axis head, actuator C7
is extended to move the pushing plates 68, 68 to the position shown by the broken line, thereby releasing the engaging plates 72, 72 from the multi-axis head.

Next, FIG. 9 shows a machine tool 10 according to a second embodiment of the present invention.
0' will be explained. This embodiment is also an 8-head type, and differs from the first embodiment in that the exchange arm 30 is slightly different, and a drive unit □ and 2 is integrated into the drive member for transporting each multi-axis head. 1 for the component (CX
1113), and a suspended conveyance member 50 with a multi-axis head.
The difference is that the configuration has been slightly changed.

Other configurations are the same. Therefore, this is only a design change of the side support, and a detailed explanation will be omitted, and parts that are the same and have the same configuration will be designated by the same reference numerals in the drawings, and the explanation will be omitted.

Next, each member 3. centering around the first embodiment described above. M,H
M.

K, , 17, 18, 30, 37, 50.70...
... are sequentially controlled by a sequencer (not shown), and the multi-axis heads H1 to ■1. correspond to the respective works W1 to W4... The operation is controlled so that the exchange arm 30 sequentially exchanges and arranges the column head 3 with respect to the column head 3. The processing situation will be explained below with reference to Fig. 8.10. First, when the hole machining of the multi-axis head H machining is completed by the column travel for the workpiece W4, Fig. 8 (a)
As shown in the figure, the multi-axis head H is
, is captured at the lower end of the exchange arm 30, and at this time, the multi-axis head H2 is captured at the upper end of the arm 30, and the other multi-axis head H7 is carried by the conveying member 50 to the vacant seat of the magazine HM. , the multi-axis head H3 is transferred to the standby position of A2, and the multi-axis head H3 is transferred to the suspended distal HA. Next, as shown in Figure 8 (b), column head 3
A new multi-axis head H2 is captured by the forward motion of the head, and when performing processing, for example, tapping, on the work W□ with this head, ) I, I are transferred onto A1 by the clamper 70 of the conveying member 50. and wait for a vacant seat due to magazine rotation.

At this time, the multi-axis head H1 at A is moved to A4, and the multi-axis head H1 at A is moved to A2.
Head H, located at Ao, goes to A, and head H4 located at Ao goes to A.
Conveyor 17.1 by machining each drive member to 2.
8.Transfer the top. Next, as shown in Figure 8 (c),
When the column head 3 is moved back after tapping, the multi-axis head H2 is held by the gripping tool 27 at the same time as H7 by the exchange arm 30, as shown in FIG. Before this, the head ■■ is placed in the vacant seat a of the magazine HM by the transport member 50.
The empty transport member 50 returns to the lifting return position A4. After this, by reversing the arm 30, H and ■I
, are exchanged, and the workpiece is also exchanged from W to W2. After that, the column head 3 moves forward to receive the new multi-axis head H1 from the arm 30, and the new W
, and start drilling holes. The above state is shown in Figure 8 (d).
As shown below. At this time, the conveying member 50 lifts up the head H1 which is at the lifting return position HA, and begins to transfer it to the straight position (80 position) of the magazine HM, which has started rotating, until a vacant seat becomes available in the magazine. stand by.

That is, after the indexing rotation of the magazine is completed, a new multi-axis head 14. After positioning the magazine HM at the delivery position A1, move the multi-axis heads H,, Il,, H2 at each position □1A2y A3 by Δ2. Δ4. 1 to the drive member that moves to Δ and Δ, respectively. Conveyor 17.1 by K.
8) -, is transferred. Waiting for the memo to be transferred, the clamp member 70 of the feeding member 50 is lowered as shown in FIG.
The multi-axis head H0 is placed ab:l in the empty seat of the magazine L, and at this time, the collet 11 head 3, which has completed hole machining, begins to retreat, and on the way, the multi-axis head H3 is transferred to the exchange arm 30 and moved to the last retreat position. Stop at. Thereafter, H1 and H4 are exchanged by the reverse movement of arm 30 (both heads are simultaneously clamped by member 27.27 shown in No. 7@). Then, tapping of different diameters is performed on the workpiece W2 as shown in FIG. On the other hand, at the same time, the drive member
．． K, connects each head H1, H5, HG to A4. Δ3. A
After that, the magazine HM starts to rotate, and the multi-axis head H is placed on the empty magazine as shown in the figure. After that, similar to FIGS. 8(c) to 8(f), the workpieces W,, W4,... and the corresponding multi-axis heads H,, H,, H,, H,... are placed in the column. The head 3 is replaced by the arm 30 and processing is performed one after another. Incidentally, FIG. 10 shows the operating state of each multi-axis head. As mentioned above, the present invention employs a system in which a large number of multi-axis heads are provided at magazine and standby positions, head exchange positions, hoisting return positions, etc., and are circulated vertically behind the machine by means of an article-holding type conveying member. It is possible to quickly replace the multi-axis head corresponding to the workpiece and save space on the machine.

Next, the differences and features of third and fourth embodiments, which are modified embodiments of the present invention, will be explained with reference to FIG. 11.12 and FIG. 13.1.4. First, in the third example (
(Figs. 11 and 12), the magazine TIM' is rear-driven by the motor M2, and the rotation axis of the multi-axis magazine TIM' is arranged horizontally so that each magazine moves in the vertical plane.
The compositional relationship that rotates on the trajectory of is what is going on. In addition, the exchange arm 30' of the multi-axis head has an H-shaped frame 30'' as a main part, and the vertical gap 1.: ← This multi-axis head I■,,
■Insert from the front and back tj directions, and the two pins P on the left and right...
It is fixed by... Furthermore, 11! The feeding member 50' is of a table type, and is provided with a clamping member 70' at its end.

The replacement position A3 and the return position A4 of the multi-axis head are at the same position, and the number of multi-axis heads is reduced by this omitted part, resulting in a six-head system configuration. However, the operation of the entire system is almost the same as in the first embodiment.

Other configurations are designated by the same reference numerals as those in the first embodiment, and their explanations are omitted. The magazine HM is the same as that in the first embodiment. Also, exchange arc 1
The only difference is the structure of the frame 30'' of %:lo'. This embodiment is also a 6-head system, and the same reference numerals as in the first embodiment will be used and the explanation will be omitted. Embodiment 4 is characterized in that the exchange position and the return position are at the same position, which simplifies the configuration.However, it is somewhat disadvantageous when it comes to high-speed exchange of multi-axis heads or when increasing the number of heads. However, it has the advantage that it can be implemented at a low cost if it meets the usage conditions.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and it goes without saying that design changes can be made within the gist of the invention.

"Effect" As mentioned above, when using the magazine-equipped multi-spindle head exchange machine tool of the present invention, the rotating multi-spindle head magazine having a plurality of multi-spindle heads and the multi-spindle heads in this magazine are sequentially moved to the standby position. and a drive member that moves the head exchange position and the lifting return position, an exchange arm that exchanges the old and new multi-axis heads between the head exchange position and the column head that moves back and forth on the bed, and the lifting return position. Although it is equipped with a suspended conveyance member that transfers the used multi-axis head in the position into the magazine, it also saves space for each member and enables high-speed exchange of multi-axis and beds for high-speed machining of workpieces. However, in addition to being able to arrange narrow intervals between machines on a transfer machine line, it is also possible to have a large number of multi-axis heads, making it possible to flexibly handle a large number of workpieces at high speed. That is, since a large number of multi-sensory heads are exchanged by rationally utilizing the vertical space, it is possible to contribute to miniaturization, space saving, and speeding up of each unit.

[Brief explanation of drawings]

FIG. 1 is a right side view of a multi-spindle head exchangeable machine tool with a magazine according to the first embodiment of the present invention, and the second t! l! I is a plan view thereof, FIG. 23 is a front view thereof, FIG. 4 is a partial cross-sectional view showing the drive mechanism of the exchange arm, and FIG. 5 is a partially cutaway front cross-sectional view showing the suspended conveyance member. (Figure 3 is a sectional view showing the clamp member from the right side,
Figure 7 is a front view showing the internal structure of the exchange arm, Figure 8 (
A to B) are action diagrams showing the exchange status of the multi-axis head corresponding to each workpiece. Fig. 9 is a side view showing the second embodiment, Fig. 9 (a) is a partial sectional view showing the operation status of the hook, Fig. 10 is a circulation diagram of the multi-shaft/bed, and Fig. 11 is the third embodiment. side view showing fi
Fig. 12 is a front view thereof, Fig. 131m is a side view showing the fourth embodiment, and Fig. 14 is a front view thereof. 1... Bed, 3... Column head, 12... Frame, 17° 18... Conveyor, 20, 23.24
...Hook, 22...Pushing rod, K1-3...Multi-axis head drive member, 30.30'...Replacement arm,
27... Grip box, 31... Cam plate, 50... Suspended conveyance member, 63... Cam plate, 70.70'...
- Clamp member, 1-1. ~I-■,... Multi-axis head, a... Flange plate, A1... Delivery position, A2... Standby position, A,... Head exchange position, A4... Hanging return position. , HM, IIM'...Multi-axis head magazine, C2 to C7...Actuator, M, MO, M2
...Motor, S...Each axis (spindle), D...
... Index motor, 100°100'...
Multi-axis head exchange machine tool with magazine.

Claims (1)

[Claims] A rotating multi-axis head magazine having a plurality of multi-axis heads; a driving member that sequentially moves the multi-axis heads in the magazine to a standby position, a head exchange position, and a lifting return position;
An exchange arm for exchanging the old and new multi-axis heads between the head exchange position and the column head that moves back and forth on the bed, and a suspension arm for transferring the used multi-axis heads at the lifting return position into the magazine. A multi-axis head exchange machine tool with a magazine, which consists of a holding conveyance member and is characterized by automatically exchanging the multi-axis head according to each workpiece.