JPH078469B2 - Work supply means - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work supply means for discriminating a type of a work sequentially sent from a work holder and exchanging the work.

Conventional technology At a production site where high-mix low-volume production is performed, it is important to efficiently process workpieces of different shapes and sizes.

In some cases, a multi-face processing device may be used to process multiple faces of a workpiece. In this case, the work is sequentially sent by the carrying device and set at a predetermined position. Then, after the work is moved to the main body side of the processing device, the work is processed. After processing, the work is returned from the main body to its original position.

The microfilm of Japanese Utility Model Application Laid-Open No. 57-98146 (Japanese Utility Model Application Laid-Open No. 59-5250) describes a work exchanging device having a conveying device, a plurality of pallets and a take-out arm. The transfer device is of a chain type and has 10 supporting members. Each pallet includes a support base that detachably fixes a work, is detachably set on a support member, and is transported to a predetermined position endlessly. And
The take-out arm replaces the pallet at a predetermined position.

Further, Japanese Patent Laid-Open No. 60-85856 discloses a heterogeneous mixed flow automation line equipped with a conveyor, a plurality of pallets, a plurality of flags and limit switches. Each pallet supports a work and is conveyed by a conveyor. A plurality of flags are installed on each pallet.
The limit switch contacts a plurality of flags and transmits production information according to the type of work to the next process.

Problems to be Solved by the Invention In the above-described multi-face machining apparatus, in order to automatically machine a wide variety of workpieces in the procedure as described above, the type of workpiece to be supplied is determined and the workpiece is matched to the type of workpiece. It is necessary to operate the processing equipment so that the processing equipment operates in the multifaceted processing procedure.

In addition, the above-mentioned actual application No. 57-98146 (No. 59-5250).
Since the transport device described in the microfilm transports along a track shape, if the number of pallets to be transported is increased by increasing the number of support members, the transport device,
The size is likely to increase accordingly. In this case, there is a problem that it is not easy to design the entire work exchanging device compactly. In addition, if the worker replaces all the workpieces and work holders set in the transfer device, there is the inconvenience that the worker must move the transfer device while moving along the transfer device. As described above, this work exchanging device is not suitable for carrying a large number of works.

Moreover, this work exchanging device also has a problem in that it cannot automatically determine the type of work fixed to the pallet.

Further, the conveyor of the heterogeneous mixed flow automation line described in the above-mentioned JP-A-60-85856 conveys pallets along a slender rectangle, so that when the number of pallets to be conveyed is increased, only that much. The entire conveyor tends to increase in size. Therefore, there is a problem similar to that of the work exchanging device described above.

Moreover, since each pallet is conveyed from the loading port of the conveyor to the discharging port, it is necessary to load the pallets one by one into the loading port and discharge the pallets one by one. There is also a problem that it cannot be processed automatically.

In addition, since the work is not fixed to the pallet but simply placed on it, there is a problem that the work is likely to move with respect to the pallet or drop off from the pallet during transportation or processing.

Moreover, since both the flag and the work are installed on the upper surface of the pallet, there is a problem that the flag is likely to get in the way when, for example, multi-face machining of the work.

Moreover, since the desired pallet cannot be automatically exchanged, it is impossible to set the pallet on a table of a multi-face processing apparatus different from the conveyor for multi-face processing.

This invention solves the above problems, automatically determines the type of workpieces on the workpiece holder that are sequentially fed before being supplied to the main body, and can immediately perform multi-face machining corresponding to the type of workpieces. Moreover, it is an object of the present invention to provide a work supply means capable of discriminating the type of work both before and after replacement by the work changer.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention relates to a hollow pin chain type conveyor which is arranged in a substantially M shape on a holder and has a predetermined number of holders, and a conveyor for the conveyor. A plurality of work holders that are detachably set in the holder and are sequentially conveyed to a first predetermined position in an endless manner along an M-shape;
Work fixing discs for fixing and holding the work on the upper side, and a plurality of dogs arranged in a row corresponding to the type of the work at a plurality of second predetermined positions on the lower side of each work fixing disc. And hold so as to contact a plurality of dogs arranged on a disk provided in the work holder at the first predetermined position, detect the positions of those dogs, and output an on / off detection signal corresponding to each work type. A plurality of contact switches arranged in a row on the body, a discriminating device that discriminates the type of the work based on the ON / OFF detection signals of the contact switches and generates a discrimination signal, and the work holder at the first predetermined position are replaced. And a work changer, each of the work holders is provided with a first groove and a second groove, and a predetermined number of first pieces are provided on the conveyor corresponding to the holders. And the first piece engages with the first groove to prevent the work holder from rotating relative to the holder, and when the work holder replaces the work holder, the second piece The gist of the work supply means is characterized in that the work holder is configured to prevent relative rotation with the work changer by engaging with the second groove.

Action The type of the work W on the work holder 23 that is sequentially sent can be determined before the work W is supplied to the main body 1.

If the type of the work W can be determined, a predetermined machining program suitable for the type of the work W, that is, the shape and size of the work W is prepared, and the supplied work W is supplied.
Can be used for multi-face machining immediately.

Embodiment FIG. 1 and FIG. 2 show the whole multi-face machining apparatus, which is of a horizontal machining center type.

The main body 1 is provided with an operation panel 2, an NC device 3, and a work supply means 4. The body 1 is surrounded by a tip guard 7. The tip guard 7 has doors 5 and 6. As shown in FIGS. 3 and 4, the main body 1 includes an automatic tool changer 13 (only a part of which is shown in FIG. 4 for simplification of the drawing), a tool magazine 8, a spindle 9 and a bed 10. is there.

The tool 11 of the spindle 9 can be exchanged with the tool of the tool magazine 8 by the automatic tool changer 13. The tool 11 is, for example, a drill.

As shown in FIGS. 3 and 4, the spindle 9 has a column 12
The vertical movement of the Y-axis stroke S1 from the lower limit level LL to the upper limit level OL (Y-axis mechanical origin position) can be performed by the built-in motor and feed mechanism in the vertical direction. When exchanging the tool 11, the spindle 9 can be further raised to the Y-axis tool exchanging position YL.

A first table 14 is installed on a rail 10a of the bed 10 so as to be horizontally reciprocally movable in the Z-axis direction by a built-in drive source and a feed mechanism. The first table 14 can be moved to the tool 11 side. That is, the first table 14 can move the Z-axis stroke S2 from the Z-axis mechanical origin position ZP to the final end position OT as shown in FIG.

On the first table 14, the second table 15 is in the X-axis direction,
That is, it is installed so as to be reciprocally movable in the horizontal direction orthogonal to the Z-axis direction by a built-in motor and a feed mechanism. As shown in FIG. 5, the second table 15 can move the X-axis stroke S3 from the X-Z axis mechanical origin position XZ to the final end position OM.

A first rotary table 16 is provided on the second table 15 so as to be indexable along the rotation direction R about the vertical rotation axis OR. In addition, X-Z axis mechanical origin position X-
Z can coincide with the axis of rotation RO.

The first rotary table 16 can be indexed by an internal motor and an index mechanism at an angle of 1 °, for example.

The first rotary table 16 has an extension 17 extending upward. A second rotary table 19 is provided on the side surface 18 of the extension portion 17 so as to be indexable along the rotation direction Q about the horizontal rotation axis QO.

The second rotary table 19 can be indexed at an angle of 1 °, for example, by a motor 17a and a built-in index mechanism.

As the second rotary table 19, for example, a collet chuck type or an electromagnetic chuck type can be adopted. Further, at the center of the second rotary table 19, there is provided a tapered hole 20 into which a work holder 23 described later is inserted (see FIGS. 4 and 5).
See figure). In the second rotary table 19, by turning on / off the current supply, the work holder 23 is mounted by the spring force of the disc spring of the collet chuck or the electromagnetic force of the electromagnetic chuck, so-called mounting force, or by releasing this mounting force. holder
23 can be removed.

The wiring of each motor of the first and second tables 14 and 15 is
It is connected to the NC unit 3. First and second tables 14, 15
The control for selecting the respective movement amounts and the movement directions on the Z axis and the X axis is set by a program of the NC device 3.
The wiring of each motor of the first and second rotary tables 16 and 19 is connected to the NC device 3. The control of selection of the respective index angles and rotation directions of the first and second rotary tables 16 and 19 is also set by the program of the NC device 3.

Further, the wiring of the motor that moves the spindle 9 up and down in the Y-axis direction is electrically connected to the NC device 3. NC control of movement amount and movement direction of spindle 9 in Y-axis direction
It is set by the program of the device 3. Also, the timing of the on / off operation of the mounting force of the second rotary table 19
It can be done by the program of NC unit 3.

Next, the work supply means 4 and the work holder 23 will be described. The work supply means 4 has a work station 21 and an automatic work changer 22, as shown in FIGS. This work supply means 4 is for loading the works W arranged in large numbers on the work station 21 one by one to the second rotary table 19 and for unloading the works W from the second rotary table 19 after processing. Is.

As shown in FIGS. 7 and 8, the work holder 23 has a disk 26 made of, for example, iron on the upper portion thereof.

On the upper surface of the disk 26, the work fixing pieces 26a are placed at the four corners.
Is provided. The fixing pieces 26a are the first to fourth parts of the work W.
The work W is pressed against the surfaces f1 to f4 to fix the work W to the disk 26.

A groove 27 is formed in the middle of the work holder 23. Further, a pull stud 28 is attached to the lower part of the work holder 23. The pull stud 28 is provided to be inserted into the hole 24 and the hole 20 of the second rotary table 19.

The conveyor 25 of the workstation 21 has a hollow pin chain structure, a part of which is shown in FIGS. 14 and 15.

Adjacent hollow pins 41, 42 are integrated by fixing their upper and lower parts by two plates 45. In addition, the adjacent hollow pins 42 and 43 have two link plates.
The upper and lower positions are connected by 46. further,
Adjacent hollow pins 43, 44 are integrated by fixing their vertical positions by two plates 47.

The holder 40 is inserted into the hollow pins 41 and 43 from above, and is fixed by the pins 41a and 43a, respectively.

Each work holder 40 has an insertion setting hole 24 for the work holder 23. A biasing means 48 is provided in the hole 24.

The urging means 48 is for pressing the pull stud 28 of the work holder 23 in the diametrical direction of the holder 40. Biasing means
The 48 is composed of a spring 48a and a ball 48b.

Further, a taper portion 40a that matches the taper surface 23a of the work holder 23 is formed on the inner peripheral surface above the holder 40.

The work holder 23 is inserted into the hole 24, and the large diameter portion 28a of the pull stud 28 is passed through the small diameter hole 40d of the holder 40, whereby the shaft portion 28b of the pull stud 28 can be pressed and held by the biasing means 48.

The holder 40 is set for every other hollow pin. For example, a total of 40 holders 40 are set in the entire length of the conveyor 25.

The work holder 23 is provided with grooves 23b and 23c at opposite positions. (See FIGS. 7, 8 and 15) Of these, the groove 23c is adapted to be fitted with the piece 40c (see FIG. 14) fixed to the plate 46. This piece 40c can prevent the work holder 23 from rotating in the holder 40.

Please refer to FIG. 2 and FIG.

The conveyor 25 meshes with sprockets (not shown) at each of the corner portions WC1 to WC5. Each sprocket is attached to a holding body 49 of the workstation 21.
The arrangement shape of the conveyor 25, that is, the shape of the transportation path WL that conveys the work holder 23 is as follows.

Transfer route part WL1 facing the automatic work changer 22
Is a straight line. Before and after this part WL1, WL2, WL4
Is similarly linear. Further, the corner portions WC1 and WC2 have a quarter circumference shape.

Further, the portion WL3 has a substantially V-shaped concave shape on the center CP side of the workstation 21. This part WL
The three corners WC3 to WC5 are almost semicircular.

The outer shape of the holding body 49 of the conveyor 25 is a shape along the transport path WL of the conveyor 25.

When the transport path WL having such a shape is used, the total length of the transport path WL can be increased while the installation area of the workstation is almost the same as compared with the case where the transport path is simply rectangular.

Therefore, more workpiece holders 23 and workpieces W can be set on the conveyor 25. Further, since the outer shape of the holder 49 is along the transport path WL, an operator can easily enter the portion WL3 and replace the workpiece holder 23 and the workpiece W at all positions in the portion WL3. Of course, part WL
Of course, the work holder 23 and the work W at all positions on 1, WL2, WL4, WC1, and WC2 can be easily replaced.

This work W and work holder 23 can be replaced by the conveyor 25.
6 can be easily performed even if it is moving in the direction of arrow H in FIG. 6 or is stopped.

For example, referring to FIG. 15, the work W and the work holder 23 are exchanged when the wrong work W is set in the hole 24 through the work holder 23.

That is, the work holder 23 in which the wrong type of work W is set can be pulled out by the operator only to pull out the large diameter portion 28a of the pull stud 28 from the small diameter hole 40d against the force of the biasing means 48. Therefore, the work holder 23 can be easily and surely removed from the holder 40.

Then, the worker simply pushes the work holder 23 in which the work W of the correct type is set into the hole 24 downwardly, and the work holder 23 is easily and surely placed in the holder 40 in the state shown in FIG. It can be set.

Please refer to FIG. 8 and FIGS.

A long groove 50 is formed on the lower surface 26a side of the disk 26. In the embodiment, five detection objects (dogs) D1 to D5 can be detachably set in the long groove 50 by screws 51 to 55. The detected objects D1 to D5 are arranged in series along the operating direction of the conveyor 25 (direction of arrow H).

The detected objects D1 to D5 are the work W on the work holder 266.
The predetermined positions P1 to P5 of the long groove 50 are selectively set in advance so as to correspond to the types of.

On the other hand, the workstation 21 is provided with the detection unit 56 shown in FIGS. 16 and 18. The detector 56 is located at a position corresponding to the automatic work changer 22. The detector 56 is attached to the inner side 49a of the holder 49 of the workstation 21 (see FIGS. 2 and 16).

The detection unit 56 includes five contact switches, for example, limit switches LS1 to LS5. The detection unit 56 is located at a predetermined position facing the arm 36 of the automatic work changer 22 and has a work holder 23.
When is reached, the presence / absence of the objects D1 to D5 to be detected at the respective positions P1 to P5 of the work holder 23 is detected.

The work Nos. 1 to 31 shown in Table 1 below are works of different types.

For example, the work W having the work number 1 is the work holder 23.
If it is above, only the detected object D1 is set in the long groove 50. Therefore, only the limit switch LS1 comes into contact with the object D1 to be turned on (indicated by an O mark), and the other limit switches LS2 to LS5 are off.

Further, when the work W with the work number 10 is on the work holder 23, only the detected objects D2 and D4 are set. Therefore, only the limit switches LS2 and LS4 are on and the others are off.

As shown in FIG. 16, the combination of the ON / OFF detection signals of the limit switches LS1 to LS5 is sent to the discriminator 57. The discriminating device 27 discriminates what kind of work W on the work holder 23 is based on the combination of the detection signals corresponding to the presence / absence of the setting of each detected body and generates a discrimination signal.
A discrimination signal indicating the type of the work W is sent to the NC device 3,
A machining program corresponding to the type of work W (work numbers 1 to 31) can be called in the NC device.

Based on this machining program, the work W is subjected to multi-face machining according to its type in the main body 1.

As shown in FIG. 2, a work W is mounted on each disk 26 of the workstation 21. The conveyor 25 of this work station 21 is operated by a driving means (not shown). The rotation timing of the conveyor 25 is given by the program of the NC device 3, and the conveyor 25 can position the work holders 23 one by one at predetermined positions facing the automatic work changer 22. Further, each operation of the automatic work changer 22 described below is performed according to the program of the NC device 3.

Next, as shown in FIGS. 4 to 6, the automatic work changer 22 comprises a main body 29 and an operating section 30 attached to the main body 29. The main body 29 can rotate 180 ° around the vertical fulcrum shaft 31. When the main body 29 rotates 180 °, the rods 32, 32 move to the retracted position by the stroke J in FIG.

The operation unit 30 is a rod that is driven by a driving means built in the main body 29.
Stroke S4 can be extended from the main body 29 via 32, 32. (See FIG. 4). The plate 33 of the operation unit 30 is a rod
It is fixed at the tip of 32. An arm support 35 is attached to the plate 33 via a support 34.

The arm support 35, the arm 36, and the peripheral elements thereof constitute a holding device 71 for the work holder 23. The work holder holding device 71 will be described in detail with reference to FIGS.

The arm support 35 has an arm 36. The arm 36 has a horizontal plate 72, bolts 75 and 76, and a detent piece 79. The first finger 73 and the second finger 73 are provided on the lower surface of the horizontal plate 72.
Fingers 74 are rotatably mounted via bolts 75 and 76, respectively.

The first and second fingers 73 and 74 have a symmetrical shape, and bolts 75 and 76 are inserted through substantially the center thereof. First finger
A claw 77 is formed on one part of 73. Similarly second
A claw 78 is also formed on one part of the finger 74.

The claws 77 and 78 are shaped to fit the groove 27 of the work holder 23 and sandwich the work holder 23 from the left and right sides.

A detent piece 79 and a spring 80 are mounted between the first and second fingers 73 and 74. The anti-rotation piece 79 is a horizontal plate 72.
It is attached to the bottom surface of. This anti-rotation piece 79 has claws 77, 78.
When the work holder 23 is inserted into the
Work holder 2 fits into b (see Figs. 8 and 19)
3 can be prevented from rotating with respect to the first and second fingers 73, 74.

The spring 80 is mounted between the bolt 81 of the first finger 73 and the bolt 82 of the second finger 74. This bolt 81
Are located between the rear portion 83 of the first finger 73 and the bolt 75. The bolt 82 is a bolt 84 with the rear portion 84 of the second finger 74.
Located between 76.

The rear parts 83 and 84 are L-shaped. A lock pin 85 can be inserted between the rear portions 83 and 84 against the tensile force of the spring 80.

The lock pin 85 is fixed to one end of the connecting plate 86 as shown in FIG. A rod 88 of an air cylinder 87, which is an operating means, is connected to the other end of the connecting plate 86.

The air cylinder 87 is fixed to the arm support 35 with bolts 89 and 90. The rod 88 can move up and down the stroke SY.

The air supply device (not shown) is activated and the rod 88
When contracted, the lock pin is locked as shown in Figs. 19-21.
85 can be inserted between the rear parts 83 and 84, and the claws 77 and 78 are work holders.
Holds 23 in between.

When the rod 88 is extended downward in the stroke SY,
As shown in the figure, the lock pin 85 can be withdrawn downward from between the rear portions 83 and 84, and the pawls 77 and 78 can be opened by the pulling force of the spring 80 to remove the work holder 23.

The arm support 35 is an air cylinder 70 that is a driving means.
Stroke along rail 37 of support 34 due to expansion and contraction of
S5 can move up and down. (See FIGS. 4 and 19) Further, the support 34, the arm support 35, and the arm 36.
Is rotated 90 degrees counterclockwise with respect to the plate 33 by the drive means and the rotation mechanism (not shown) as shown by the two-dot chain line in FIG.
It can be rotated.

Next, consider the case where the rectangular parallelepiped work W shown in FIG. 9 is processed. The fifth surface f5 of this work W is a square. Finally, according to the machining program of NC unit 3, work W
The first to fifth surfaces f1 to f5 are drilled by the tool 11.

First, as shown in FIG. 5, the first table 14 is moved to the tool 11 side (Z-axis direction) by a predetermined distance 1 from the XZ-axis machine origin position XZ. Next, the second table 15 is moved by the X-axis stroke S3 along the X-axis direction to the final end OM position as shown in FIG.

Further, the first rotary table 16 is indexed 90 ° clockwise from the state shown in FIG. 3 so that the rotation axis QO of the second rotary table 19 is parallel to the X axis.

By doing so, the first and second rotary tables 16,
19 is set to the state shown in FIG. 4 and FIG. (Hereinafter, this is referred to as an initial setting position.) On the other hand, the conveyor 25 of the workstation 21 operates in the direction of arrow H (see FIG. 6). As shown in FIG. 18, one work holder 23 is transported along the transport path WL and reaches a predetermined position. That is, the work holder 23 and the work W on the work holder 23 face the arm 36 of the automatic work changer 22.

For example, consider a case in which the work W at this time is a work of the kind of work number 10 shown in Table-1 (Figs. 16 and 17).
See figure).

Detected bodies D2 and D4 are attached to the disk 26 of the work holder 23. The limit switches LS2 and LS4 of the detection unit 56 come into contact with the detected objects D2 and D4, respectively.

Therefore, the limit switches LS2 and LS4 are turned on and the other limit switches LS
A combination of detection signals is sent where 1, LS3, LS5 are off.

The discriminating device 57 discriminates the type of the work W from the combination of the detection signals and generates a discriminating signal. This discrimination signal is sent to the NC device 3. The NC device 3 calls a machining program corresponding to the type of the work W based on this signal.

Next, the operation of the automatic work changer 22 will be described with reference to the arrow A1 in FIG.
This will be described with reference to A11.

Rod of the automatic work changer 22 shown in FIGS. 4 to 6.
Extend 32 stroke S4 (arrow A1 direction).

Here, please refer to FIG. 19 and FIG.

The rod 88 of the air cylinder 87 is in a stretched state. First
22 and the second fingers 73 and 34 advance in a slightly opened state as shown in FIG. 22, and the claws 77 and 78 are provided on both sides of the groove 27 of the work holder 23.
Is located. Then, the anti-rotation piece 79 fits in the groove 23b of the work holder 23.

Next, the air cylinder 87 contracts and the lock pin 85
Inserted between 83 and rear 84.

Therefore, the claws 77 and 78 are forcibly brought into close contact with the groove 27, and the fingers 73 and 74 can sandwich and hold the work holder 23.

Referring to FIG.

Then, the arm support 35 is moved up by the stroke S5 to forcibly pull out the work holder 23 from the hole 24 of the conveyor 25 (arrow A2), and the rod 32 is contracted through the stroke S4 while holding the work holder 23 and the work W ( Arrow A3 direction).

Next, the main body 29 rotates 180 ° in the directions of arrows A4 and A6. During this rotation, the support 34 and the arm support 35 rotate counterclockwise by 90 ° (90 in the two-dot chain line at position P5 in FIG. 6).
Shows the state rotated by °. The work W and the work holder 32 are not shown for simplification. ) Then, the work W is turned sideways. When the main body 29 has finished rotating in the direction of arrow A6, the arm
36 and the work holder 23 are located near the second rotary table 19. The rod 32 again extends to the stroke S4 (in the direction of arrow A7), and the work holder 23 and the work W are positioned immediately before the second rotary table 20 as shown in FIGS. 4 and 5. That is, the center axis of the work holder 23 and the hole 20
The center of is matched.

Subsequently, the arm support 35 moves the stroke S5 (arrow
A8 direction), pull stud 28 of work holder 23
Inserted in.

Reference is now made to Figures 18-22.

At this point, the rod 88 of the air cylinder 87 extends and the lock pin 85 is withdrawn from between the rear portions 83 and 84. Therefore, the pulling force of the spring 80 opens the claws 77 and 78.

Please refer to FIG. 6 and FIGS. 18 to 22.

Then, the rod 32 is contracted by the stroke S4, and the finger 7
Remove 3, 74 from the work holder 23 (direction of arrow A9). A mounting force is generated on the second rotary table 19 to securely mount the work holder 23 on the second rotary table 19.
Then, the arm support 35 moves again by the stroke S5 (direction of arrow A10), and then the main body 29 is rotated 180 ° in the reverse direction (arrow A11).
Direction) and return the arm 36 to the workstation 21 side.

Next, referring to FIGS. 4 and 5, the first table
14 is moved to the tool 11 side, and the second table 15 is also moved forward from the final end position OM along the X-axis direction. That is,
The first surface f1 (see FIGS. 9 and 10) of the work W is made to face the tool 11. The tool 11 has already been set at a position where it can be moved in the Y-axis direction and machined at a predetermined position on the first surface f1 of the work W.

Based on the multi-face machining program of the NC device 3 suitable for the type of the work W, the work W is divided into the first to fifth parts as follows.
The surfaces f1 to f5 are processed. (Refer to FIG. 3 and FIG. 10) The first table 14 is further moved to the tool 11 side, and the first surface f1
Drill to a specified depth. Next, after processing, the first table 14 is moved backward. The second rotary table 19 is indexed by 90 ° clockwise to index the second surface f2. Again, the first table 14 is moved forward to the tool 11 side, and the second surface f2 is drilled to a predetermined depth. Then, drill the third surface f3 and the fourth surface f4 in the same manner.

When the machining of the first to fourth surfaces f1 to f4 is completed, the first table 14 is moved backward.

Next, the first rotary table 16 is indexed 90 ° counterclockwise about the rotation axis RO, and the third rotary table 16 is moved from the state shown in FIG.
The orientation of the work W is changed to the state shown in the figure, and the fifth surface f5 faces the tool 11. Then, the first table 14 is moved forward again, and the fifth surface f5 is drilled to a predetermined depth. In this way, once the work W is attached to the second rotary table 19, the first to fifth surfaces of the work W can be processed.

When the processing is completed, the first and second tables 14 and 15 are moved to return to the above-mentioned initial setting positions (see FIGS. 4 and 5).

Next, referring to FIGS. 6 and 11, the machined workpiece W
The procedure for unloading the program into the workstation 21 will be described.

As described above, the arm 36 rotates 180 ° in the direction of arrow A11 and returns to the workstation 21 side. First, the body
29 rotates counterclockwise 180 ° along arrow B1.
Then, the arm support 35 is moved toward the second rotary table 19 by the stroke S5 (direction of arrow B2). Further rod
Extend 32 in the direction of arrow B3.

Reference is now made to Figures 19-22.

Claws 77 and 78 are located on both sides of the groove 27 of the work holder 23. Then, the anti-rotation piece 79 fits in the groove 23b.

The air cylinder 87 contracts, and the lock pin 85 locks the rear portion 83,
It is inserted between 84. Therefore, the claws 77 and 78 can hold the work holder 23 while sandwiching it.

In this state, the generation of the mounting force of the second rotary table 19 is stopped. When the arm support 35 is further moved by the stroke S5 (in the direction of arrow B4), the work holder 23 comes out of the second rotary table 19 and enters the state shown in FIG.

After this, the rod 32 is contracted in the direction of arrow B5, and the arrow B6,
Rotate body 29 clockwise 180 ° along B8. However, during this rotation, at the position P7, the support 34 and the arm support 35 rotate 90 ° clockwise with respect to the plate 34, and the work W returns to the upright state.

The rod 32 extends again in the direction of arrow B9,
Is located above the original hole 24 of the conveyor 25.

Next, lower the arm support 35 by the stroke S5 (in the direction of arrow B10), and as shown in FIG.
The pull stud 28 is inserted into the hole 24 and is prevented from coming off by the biasing means 48. Then, the rod 88 of the air cylinder 87 shown in FIG. 19 is extended, and the lock pin 85 is attached to the rear portions 83 and 84.
Exit from. The rod 32 is contracted in the direction of arrow B11, and the fingers 73 and 74 are removed from the work holder 23.

In this way, loading, processing and unloading of one work W are completed.

The work W to be processed next is sent to a predetermined position facing the arm 36 by sending the conveyor 25 in the direction of arrow H in FIG. 6, and the kind of the work is determined. The workpieces W that are sequentially fed are sequentially loaded on the second rotary table 19 by the above-described procedure, processed according to the machining program suitable for the type of workpiece, then unloaded from the second rotary table 19 and returned to the workstation 21. Be done.

By the way, in addition to the first to fifth surfaces f1 to f5 of the work W, the work
The corner C of W1 may be processed. In this case, for example,
As shown in FIG. 12, the second rotary table 19 is indexed so that the first surface f1 faces the tool 11. Further, the second rotary table 19 is indexed, for example, by 45 ° clockwise so that the corner portion C faces the tool 11. Then, if the workpiece W1 is moved to the tool 11 side, the corner C
Can be drilled.

By the way, the present invention is not limited to the above-mentioned embodiments. For example, the longitudinal direction of the bed may be a direction orthogonal to the axial direction of the spindle.

Further, the disk 26 may be made of a permanent magnet, and the work W made of iron, for example, may be mounted on the disk 26.

Two to four detection objects or five or more detection objects may be attached to the disk. In this case, the number of switches of the detection unit is adjusted to the maximum number of detection objects.

EFFECTS OF THE INVENTION As described above, according to the present invention, it is possible to determine the types of works on the work holder that are sequentially fed, and, for example,
When the work is transferred to the main body of the processing machine and processed, it can be processed immediately by the processing program corresponding to the type of work.

Moreover, a hollow pin chain type conveyor having a predetermined number of holders arranged in a substantially M shape on the holder,
Since a plurality of work holders that are detachably set to the conveyor holders and are sequentially conveyed to the first predetermined position endlessly along the M-shape are provided,
Compared with the conventional track-shaped or rectangular-shaped conveyor, the track of the conveyor can be lengthened to set a large number of work holders, and the entire conveyor can be designed compact. Further, the holding body can be formed in an M shape according to the shape of the conveyor. In this case, the operator can easily enter all the workpieces and workpiece holders set on the conveyor by entering the M-shaped recess. Therefore, the work and the work holder can be easily managed.

In addition, a work fixing disk that fixes and holds the work on the upper side, and a plurality of second predetermined positions on the lower side of the disk of each work holder are arranged in a line corresponding to the type of work. Since it is equipped with a dog, it prevents the work from moving relative to the work holder or falling off from the work holder when transporting or replacing the work holder, and when machining the work, The dog doesn't get in the way of processing.

Moreover, it holds so as to contact a plurality of dogs arranged on the disk provided in the work holder at the first predetermined position, detect the positions of those dogs, and output an on / off detection signal corresponding to the type of each work. Since the plurality of contact switches arranged in a line on the body and the work changer for exchanging the work holder at the first predetermined position are provided, it is possible to determine the type of work of the work holder before the change by the work changer. It is also possible to determine the type of work of the work holder after replacement. Therefore, the work holder can be replaced automatically and can be managed appropriately.

Moreover, each work holder is provided with the first groove and the second difference, the conveyor is provided with a predetermined number of first pieces, the work changer is provided with the second piece, and the work changer is provided with the first piece. Engaging with the first groove prevents the work holder from rotating relative to the holder, so that the dog of the work holder at the first predetermined position is reliably positioned with respect to the contact switch. Therefore, the position of the dog can be accurately detected by the contact switch.

Moreover, when the work holder is replaced by the work changer, the second piece engages with the second groove to prevent the work holder from rotating relative to the work changer. It is possible to accurately detect the position of the dog of the work holder before the operation, and also to accurately detect the position of the dog of the work holder after the replacement.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing a multi-face machining apparatus equipped with a work supply means according to a preferred embodiment of the present invention, and FIG. 2 is a plan view of the multi-face machining apparatus shown in FIG. 3 and 4 are perspective views showing the main part of the main body of the multi-face machining apparatus, FIG. 4 is a front view showing the positional relationship between the spindle, the first rotary table and the work supply means, and FIG. 5 is a spindle. A plan view showing the positional relationship between the first rotary table and the work supply means,
6 is a perspective view showing the work supply means and the first and second rotary tables, FIG. 7 is a plan view of the work holder and the disk, and FIG. 8 is a partially cutaway front view showing the work holder and the disk. , FIG. 9 is a perspective view showing an example of the work, FIG. 10 is a view showing a state in which the first surface of the work is to be processed, and FIG. 11 is a procedure for unloading the work from the second rotary table. FIG. 12, FIG. 12 and FIG. 13 are views for explaining the processing of the corner portion of the work, FIG. 14 is a plan view showing a part of the conveyor of the workstation, and FIG. Front view with partial cross-section showing part,
FIG. 16 is a front view showing the object to be detected and the detection section, FIG. 17 is a view with a partial cross section showing the object to be detected and the disk, and FIG. 18 is a schematic plan view showing the conveyor path and the detection section. Figure, first
FIG. 19 is a front view with a partial cross section of an arm and a finger holding a work holder, FIG. 20 is a plan view with a partial cross section of an arm and a finger holding a work holder, and FIG. FIG. 22 is a perspective view of an arm and a finger holding the work holder, and FIG. 22 is a plan view showing a partial cross section of the arm and the finger holding the work holder. 1 …… Main body 3 …… NC device 4 …… Work supply means 9 …… Spindle 10 …… Bed 11 …… Tool 14 …… First table 15 …… Second table 16 …… First rotary table 19 …… First 2 Rotary table 20 …… hole 21 …… workstation 22 …… automatic work changer 23 …… workpiece holder 35 …… arm holder 36 …… arm 40 …… holder 48 …… biasing means 56 …… detector 73,74 …… Fingers 85 …… Lock pins 87 …… Air cylinders D1 to D5 …… Detected object W …… Work WL …… Transport path

Claims (1)

[Claims] 1. A hollow pin chain type conveyor, which is arranged in a substantially M shape on a holder and has a predetermined number of holders, and the holders of the conveyor are detachably set along the M shape. A plurality of work holders that are sequentially transported to the first predetermined position endlessly, a work fixing disk that is provided on the top of each work holder and that holds the work by fixing it to the upper side, and each work fixing A plurality of dogs arranged in a row corresponding to the type of the work at a plurality of second predetermined positions on the lower side of the disc, and a plurality of dogs arranged on the disc provided in the work holder at the first predetermined position. Multiple contact switches arranged in a row on the holder so as to contact the dogs and detect the positions of the dogs and output on / off detection signals corresponding to each work type, and their contact A work changer for replacing the work holder at the first predetermined position, and a work changer for distinguishing the work type based on the on / off detection signal of the switch, and a first groove for each work holder. And a second groove is provided, a predetermined number of first pieces are provided on the conveyor corresponding to each holder,
When the second piece is provided on the work changer and the first piece engages with the first groove to prevent the work holder from rotating relative to the holder, and to replace the work holder by the work changer The work supply means is characterized in that the second holder is engaged with the second groove to prevent the work holder from rotating relative to the work changer.