JPH0340527Y2 - - Google Patents

Description

[Detailed description of the invention] Technical field of the invention This invention is dedicated to processing that efficiently realizes machining of different pitches by changing the feed rate of the workpiece for each processing station during the process of sequentially transporting the workpiece along the processing line. Regarding machines.

BACKGROUND ART In a transfer device of an in-line type transfer machine, a combination mechanism of a cylinder or a rotary drive source and a crank device is used as a reciprocating drive source for a transfer bar. With these drive devices, it is not possible to change the feed amount while the workpiece is being transported.

For example, Special Publication No. 52-6908 and Special Publication No. 55
-The invention of No. 36460 corresponds to the type of workpiece,
A means for automatically changing the feed amount is shown. In these inventions, the feed amount is determined for all workpieces in the processing line depending on the type of workpiece, so the feed amount cannot be changed for each processing station or for each workpiece. Therefore, when changing the feed rate for each processing station, a separate processing line must be used.
The machining process becomes complicated, and the feed motion tends to be out of synchronization.

Purpose of the invention Therefore, the purpose of the present invention is to synchronize the feed motion of all machining stations, to be able to set different feed rates for each machining station, and to adjust the feed rate for multiple holes in accordance with the different feed rates. It is an object of the present invention to provide a dedicated machine that can easily change the processing pitch.

Therefore, in the present invention, the workpiece is simultaneously fed by a lift device common to multiple processing stations, and a transfer bar is provided for each processing station, and each transfer bar is driven by a feed screw mechanism and a feed motor. In addition, each of these feed motors can be set for each predetermined feed amount by a dedicated controller. Since each transfer bar transfers the workpiece at a different feed rate to the corresponding machining station, each machining station, such as a drilling machine, can use a single spindle to machine holes of different pitches in the workpiece.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings.

First, FIG. 1 shows a dedicated processing machine 1 of the present invention.

This dedicated processing machine 1 includes a first transfer bar 2, a second transfer bar 3, and two feed motors 4 and 5 as main parts. The first and second transfer bars 2, 3 correspond to the first and second processing stations 6, 7, respectively, and are provided at a predetermined interval along the transport direction of the workpiece 8. One ends of the first and second transfer bars 2 and 3 are connected to rollers 9 and 10, respectively.
The feed nuts 11 and 12 are connected to each other so that they can move up and down inside vertical elongated holes formed in the upper portions thereof. The feed nuts 11 and 12 are screwed into corresponding feed screws 13 and 14, respectively.
These feed screws 13 and 14 are connected to the machine frame 1, respectively.
It is rotatably supported by a pair of bearing blocks 17 and 18 above 5 and 16, and is connected at one end to the feed motors 4 and 5, respectively. The feed motors 4 and 5 are, for example, pulse motors, and each controller 1 for program/NC control.
9 and 20. In this way, transport drive devices 33 and 34 are configured to correspond to each transfer bar 2 and 3, respectively.

On the other hand, the first and second transfer bars 2 and 3 are constructed as a lift-and-carry system, and are supported by a parallel link mechanism. That is, the arm 22 as one link of the parallel link mechanism is rotatably supported by a shaft 21 at a fixed position, and is connected to a sliding guide 24 by a pin 23 at the upper end. This sliding guide body 24 is connected to the first or second transfer bar 2, 3 in a sliding pair. Some of these arms 22 are connected to a lift rod 26 by pins 25. This lift rod 26 is supported to be slidable in the axial direction on the bearing blocks 17 and 18, and is connected at one end to a lift cylinder 27 supported by one machine frame 16. In this way, the first and second transfer bars 2,
A lift device 35 is configured to raise and lower the 3 at the same time.

Note that, as shown in FIG. 2, a workpiece stand 28 for transfer is provided between the first processing station 6 and the second processing station 7. Single-spindle drilling machines 29 and 30 are also provided corresponding to the first machining station 6 and the second machining station 7, respectively.

action of invention Hereinafter, the operation of the special processing machine 1 will be explained.

As shown in FIG. 3, two types of holes 31 and 32 are provided in the workpiece 8 at pitches P1 and P2, respectively. One of the two holes 31 is machined by a drilling machine 29 at the first processing station 6, and the other two holes 32 are machined by a drilling machine 30 at the second processing station 7. Therefore, the feed amount at the first processing station 6 corresponds to the pitch P1, and the feed amount at the second processing station 7 corresponds to the pitch P2.

First, the workpiece 8 is first supplied to a supply station (not shown) provided before the first processing station 6 by an automatic supply device (not shown) or the like. On the other hand, the workpiece 8 whose two holes 31 have been machined at the first processing station 6 is placed on the workpiece table 28 .

The first and second transfer bars 2, 3 are provided with respective controllers 19, 3 in the lowered position.
20, feed motors 4, 5, feed screws 13, 1
4 and feed nuts 11, 12 to provide the necessary feed amount, and the first transfer bar 2
The second transfer bar 3 corresponds to the position of the supply station and the position of the workpiece table 28, respectively.

Next, the lift cylinder 27 is connected to the lift rod 26.
, and rotate all the arms 22 clockwise, thereby raising the first and second transfer bars 2 and 3, and placing the workpiece 8 on the supply station on the first transfer bar 2. The workpieces 8 on the workpiece stand 28 are respectively placed on the second transfer bar 3.

In this state, the transfer bars 2 and 3 are given the necessary feed amount for carrying in by the respective controllers 19 and 20, and the first transfer bar 2 transfers the workpiece 8 to the first processing station. 6, the second transfer bar 3 feeds the workpiece 8 to the second processing station 7.

Thereafter, when the transfer bars 2 and 3 are lowered by the lift device 35, the workpieces 8 are positioned at the processing stations 6 and 7, respectively. At the first processing station 6, one hole 31 of the workpiece 8 is
The drill of the drilling machine 29 corresponds to the hole 32 of the workpiece 8 at the second machining station 7.
The drill of the drilling machine 30 corresponds to this, and the hole is machined thereby.

When the hole machining for each hole is completed, the transfer bars 2 and 3 are raised by the lift device 35, and the workpiece 8 is placed thereon. Next, the transfer bars 2, 3 are connected to respective controllers 19, 20.
gives the required feed amount. In other words, the first transfer bar 2 is given a feed amount of pitch P1, and the second transfer bar 3 is given a feed amount of pitch P1.
is given the feed amount of pitch P2.

After this, when the transfer bars 2 and 3 are lowered, the workpiece 8 at the first processing station 6 is
For machining the other hole 31 , the workpiece 8 is again positioned above the first machining station 6 and at the second machining station 7 . 7, where the drill press 29,
Hole processing is performed by 30.

In this way, when the hole machining is completed at each machining station 6, 7, the transfer bars 2, 3 rise, and the workpiece 8 on the first machining station 6 is transferred onto the first transfer bar 2 at the second machining station.
The workpiece 8 on the second processing station 7 is placed on the transfer bar 3 of the machine. Next, the transfer bars 2 and 3 are given the necessary feed amount for unloading by the respective controllers 19 and 20, and the first transfer bar 2 moves the workpiece 8 to the position on the workpiece table 28. The second transfer bar 3 transfers the workpiece 8 to the second processing station 3.
It is sent to an unillustrated carry-out station provided at a later stage.

Thereafter, when the transfer bars 2 and 3 are lowered, the workpiece 8, which has passed through the first processing station 6 and has undergone two hole machining, is positioned on the workpiece table 28. On the other hand, the workpiece 8 has passed through the second processing station 7 and has completed all four holes.
is positioned at a carry-out station, from where it is sent out to the next conveyance line by an automatic carry-out device (not shown).

The transfer bars 2, 3 are then fed back by the respective controllers 19, 20 in the lowered position, the first transfer bar 2 being moved back to the position of the supply station and the second transfer bar 3 returns to the original position of the workpiece stand 28.

In this way, the transport cycle in one line by lifting and carrying the transfer bars 2 and 3 is repeated.

Note that the first and second transfer bars 2,
The feeding motions for No. 3 are performed simultaneously within a range where they do not interfere. However, if the first and second transfer bars 2 and 3 are formed on different straight lines so as not to interfere with each other, free feed movement is possible without being restricted by the range of feed amount. Furthermore, on the side of the second transfer bar 3 with a larger stroke, in order to match the start and end points of the other first transfer bars 2,
The speed of the return step is set faster than the other one.

Effects of the invention In this invention, transfer bars corresponding to each station are provided along the conveyance direction, and the feed amount of each transfer bar can be set independently. processing and processing of different pitches for different types of workpieces can be realized using the same dedicated processing machine. Furthermore, the workpiece can be easily transported between the processing stations by the first and second transfer bars via the workpiece stand by setting the respective feed amounts. Therefore, for high-mix, medium- to low-volume production using machines that can be operated unmanned,
Flexible handling is possible by changing the feed rate of the transfer bar within the same line.

Furthermore, since the feed motion is performed by a common lifting device, there is no possibility of the feed motion becoming out of synchronization.
There is no collision between works, and a series of synchronized control becomes easy.

[Brief explanation of the drawing]

FIG. 1 is a side view of the dedicated machining machine of the present invention, FIG. 2 is a layout diagram of a machining station, and FIG. 3 is a plan view of a workpiece. 1... Processing machine, 2... First transfer bar, 3... Second transfer bar, 4, 5...
...feed motor, 6...first processing station,
7...Second processing station, 8...Workpiece,
11, 12... Feed nut, 13, 14... Feed screw, 19, 20... Controller, 28... Workpiece stand, 33, 34... Conveyance drive device, 35... Lift device.

Claims (1)

[Scope of utility model registration request] In a dedicated processing machine that simultaneously transports and processes multiple workpieces with different processing position pitches, there are first and second processing stations installed along the transport direction, and a transfer system installed between these processing stations. a workpiece stand for use in the processing station, first and second transfer bars that are provided between each processing station and the workpiece stand and that directly conveys the workpiece, and that support these transfer bars so that they can be freely displaced in the conveyance direction and that simultaneously A lift device for raising and lowering, a feed nut and a feed screw screwed into each transfer bar are provided, a feed motor is connected to each feed screw, and each feed motor rotates at a feed amount corresponding to a different pitch. A dedicated workpiece processing machine characterized by comprising a conveyor drive device connected to a controller that issues commands.