JPH06126496A - Forward progressive processing device - Google Patents

Abstract

PURPOSE:To efficiently enable the forward progressive processing of especially strip shaped materials to be worked by performing the processing of each stage within a single device, forwarding at a pitch the materials to the next stage successively, adding and advancing processes. CONSTITUTION:Plural processing units 150-550 are arranged in the forwarding direction of the materials to be worked, and each of the pitch-forwarding devices 50, 650 is provided on the up and down stream sides of the first processing unit 150 and the last processing unit 550. The pitch-forwarding device is provided such that the strip shaped materials can be delivered in relay; the processing units are provided with independent driving means; and the detectors 180-580 are provided for detecting that the materials to be worked have been delivered to the up stream in the forwarding direction of the material. A driving means is formed in such a manner as is selectively drivable through a control means which is operated by the signal of the detectors, and the driving means is structured to drive only the processing unit where the strip shaped material to be worked is evidently present. Thus, without bringing about the wear of punches and dies, the working rate and the dimensional accuracy of the processing units are improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, for example, when performing punching, bending and drawing on a work piece, performs each step in one set of equipment, and sequentially performs the work piece on the next step. The present invention relates to a progressive-feed machining apparatus that feeds a pitch to advance machining, advances the machining, and completes the machining in the final step, and particularly relates to a progressive-feed machining apparatus that can efficiently perform progressive machining on a strip-shaped workpiece. .

[0002]

2. Description of the Related Art Conventionally, when a sheet metal product having a predetermined shape is manufactured by punching, bending, drawing or compressing a plate made of a structural material such as a steel plate, several steps are required. Is normal. When the number of sheet metal products manufactured is large, each process or stage is individually processed in one processing die, and the workpiece is sequentially sent to the next stage to add processing. Then, the method of completing the processing at the final stage is adopted. Such a processing die is referred to as a progressive die, and one sheet metal product can be obtained for each stamp of the press, for example, so that it has an advantage of extremely high efficiency.

In the above-mentioned conventional progressive feed die,
It has the advantages of high production speed, short delivery time after the work material is put in and completion of processing, less work-in-progress in the intermediate process of press working, and the possibility of mass production by a small number of people. There is a problem.
That is, since a plurality of pairs of punches and dies are incorporated in one die, the die structure becomes extremely complicated, and highly precise die manufacturing technology is required, and the production period is lengthened and the production cost is increased. Will be expensive.

Further, even in the case of partial damage, repair and adjustment of the mold, it is necessary to disassemble the entire mold, and since these operations are complicated, a lot of time and man-hours are required. Furthermore, in a high-mix low-volume production, if the shape and size of the work piece are slightly different and a dedicated die is produced each time, the die cost becomes expensive, and the demand gradually increases in recent years. However, there is a problem that it is not possible to meet the so-called FMS production method that is increasing.

In order to solve such a problem, the present applicant has already filed an application for a progressive feeding apparatus having a simple structure and capable of easily performing a partial adjustment and the like (for example, Japanese Patent Application No. 2000-242242). Hira 2-121760, 2-1
No. 21761). The present invention is based on these improved inventions and further improved.

FIG. 1 is a perspective view of an essential part showing an example of a progressive feeding apparatus which is a premise of the present invention. In FIG. 1, 100-
Reference numerals 500 denote processing units, which are arranged on the base 1 in the feeding direction of a workpiece (not shown) at intervals of, for example, 2P (P is a feed pitch of the workpiece). Each of these processing units 100 to 500 corresponds to a plurality of processing steps.
A pair of punches and dies are provided, but processing unit 1
The configuration will be described by taking 00 as an example. Reference numeral 101 is a main body, which is formed in a substantially U shape and has a dovetail shape at the lower end 102
Is integrally provided, and by adjusting the dovetail groove 103 provided in the base 1, it is possible to adjust the movement in the feed direction of the workpiece.
In addition, it is formed so that movement of the workpiece can be restricted in the direction perpendicular to the feed direction. Reference numeral 104 is a movement adjusting device, and 105 is a clamp device. A hydraulic cylinder 106 is provided at the upper end of the main body 101. A position measuring device 107 is provided on the side surface of the hydraulic cylinder 106.

Next, reference numeral 108 denotes a cassette, which is formed in a substantially U shape and has a punch or a die (neither is shown) on the upper portion.
Is provided so that it can be moved up and down, and a punch or a die or a pair (not shown) paired with the die is provided at the bottom and is detachably attached to the main body 101. The cassette 108 is positioned by engaging the positioning members 309 and 310 as shown in the processing unit 300. 111 is a clamp screw. That is, the cassette 108 is positioned by a positioning member (not shown, the processing unit 3
Main body 1 through reference numerals 309, 310 in 00)
It is configured such that a predetermined positioning can be performed by mounting it on 01 and the position can be fixed by tightening the clamp screw 111. After the cassette 108 is fixed, the operating rod (not shown) of the hydraulic cylinder 106 is connected to the punch or die that is vertically movable.

2A and 2B are explanatory views of a main part showing a processing state of a material to be processed. FIG. 2A is a plan view and FIG. 2B is a cross section. The same parts are designated by the same reference numerals as those in FIG. Indicate. In FIG. 2, reference numeral 2 is a workpiece, which is intermittently fed at a pitch P in the arrow direction. That is, in FIG. 1, the pitch is fed through a gap between a pair of punches provided in the cassette 108 (similarly in other cassettes) and a die. 1 and 2, the processing unit 100-
Reference numeral 500 is formed so as to correspond to the machining process of the pilot hole 3, the machining process of the arcuate notch 4, and the first to third drawing processes, respectively.

First, the processing unit 100 is provided with a punch and a die for forming the pilot hole 3, and the pilot hole 3 is provided at a position P on the downstream side of the workpiece 2 in the feeding direction.
Is provided with a guide (not shown). Therefore, the pilot holes 3 are sequentially drilled each time the machining unit 100 is operated, and the guides are engaged with the drilled pilot holes 3 to prevent undesired displacement of the workpiece 2 and improve accuracy. Can be held.

Next, in the processing unit 200, the arcuate cut 4 is processed. And processing unit 30
At 0, the first drawing process is performed to form a bowl-shaped projection 5 on the workpiece 2 and the arcuate notch 4 widens to change into an arcuate groove 6. Further, in the processing unit 400, the second drawing process and the processing of the flange hole 7 are performed, and the height of the protrusion 5 increases. In the processing unit 500, the third drawing process is performed to form the height of the protrusion 5 into a predetermined size. After that, although not shown in the drawing, a predetermined bowl-shaped sheet metal product is obtained by performing edge cutting and other processing. Processing units 200 to 500
Also in the above, it is needless to say that the positioning for ensuring the predetermined accuracy is performed by providing the guide that engages with the pilot hole 3.

[0011]

According to the progressive feeding apparatus having the above-mentioned structure, the structure is simpler than that of the conventional progressive feeding die, and the production is easy, and the high efficiency is achieved even in the production of a wide variety of products in small quantities. Although it has the advantage that it can be processed, it has the following problems.

The above-described conventional progressive feeding apparatus is effective for effectively progressive feeding a long hoop material. However, when progressively machining a small-sized product, a hoop material having a small width is fed. Need to send. Therefore, a wide hoop material must be so-called slit-machined in the longitudinal direction, and this slit-machining requires extra machining time and machining man-hours. Further, the hoop material has a curl in the longitudinal direction, and particularly, in the case where high precision and / or strict flatness is required, additional processing is required for curling.

On the other hand, in the case of a standard length material or a strip-shaped material, it is easy to handle as compared with the above-mentioned hoop-shaped material and has a high flatness, so that it is suitable as a material of a product requiring high precision. is there. However, when processing such a fixed-length material or a strip-shaped material by the above-described progressive feeding device, there is a problem that the operating rate of the processing unit is reduced.

Not only that, but also in the processing unit in which there is no work material, the punch and the die are forced to engage with each other, which causes so-called blank driving, resulting in undesired wear of the punch and the die. However, there is a problem that the life is shortened. Further, by connecting the strip-shaped workpieces in a long shape, there is an advantage that the above blanking can be prevented and the operation rate of the processing unit can be improved, but an extra processing cost for connection is required. . Further, for example, when welding joining means is adopted, there is a case where processing of a portion hardened or deteriorated by welding joining is inevitable, which results in manufacturing a defective product and causes wear of punches and dies. There is a problem of shortening the life.

The present invention solves the problems existing in the above-mentioned prior art, and even by using a strip-shaped material to be machined, progressive machining can be effectively performed without causing wear of the punch and die. The purpose is to provide a device.

[0016]

In order to achieve the above object, in the first aspect of the invention, first, a plurality of processing units each having a cassette having a plurality of processing means detachably provided in a main body are provided. Corresponding to the machining step, the workpieces are arranged in the feed direction at intervals of mP (m is an arbitrary positive integer, P is the feed pitch of the workpiece), and the pitch feed of the workpiece is described above. In a progressive processing apparatus configured to sequentially perform a plurality of processing steps by the plurality of processing units, an upstream side of a workpiece in a first processing unit and a downstream side of a workpiece in a final processing unit in a feed direction. And a pitch feed device for each of the workpieces, the pitch feed devices are arranged at intervals such that strip-shaped workpieces can be relay-fed, and a plurality of machining units are provided with independent driving means. ， At least A means for detecting that the workpiece is fed is provided to the upstream side or the upstream side pitch feed device of the workpiece in the first processing unit, and the driving means is operated by the signal of the detecting means. The technical means is adopted in which it is formed so that it can be selectively driven through the control means, and only the processing unit in which the strip-shaped workpiece is completely present is driven.

Next, in the second aspect of the invention, the technical means of the first aspect of the invention is provided with at least one intermediate pitch feed device between arbitrary machining units, and the intermediate pitch feed device and the workpiece are machined. The technical means of arranging the pitch feeding device provided on the upstream and downstream sides in the feeding direction and the adjacent intermediate pitch feeding device at intervals allowing relay feeding of the strip-shaped workpiece.

[0018]

With the above construction, the strip-shaped workpiece is pitch-fed by the upstream pitch feeder, and the downstream side is fed before the engagement between the pitch feeder and the rear end of the workpiece is released. Since the pitch feeding device and the front end portion of the workpiece are engaged with each other, the relay feeding between the pitch feeding devices is smoothly performed, and the workpiece can be subjected to the predetermined progressive feeding. .

Further, between the preceding work material and the following work material, when the relevant part is present in the working unit, the driving of the unit is stopped via the control means, and the work material is Only completely existing processing units can be selectively driven to prevent undesired damage and / or wear of the punch and / or die due to blanking.

When the length of the strip-shaped workpiece in the longitudinal direction is small, or when the interval between adjacent processing units is large, at least one is provided between arbitrary processing units. By providing the intermediate pitch feeding device, the intermediate feed devices can be smoothly relayed between the adjacent intermediate pitch feeding devices and between the intermediate pitch feeding device and the upstream and downstream pitch feeding devices. Therefore, it is possible to perform a predetermined progressive machining on the work material.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 3 is a plan view of a principal portion showing a first embodiment of the present invention. In FIG. 3, 150 to 550 are processing units, respectively. The processing units 100 to 100 shown in FIG.
The configuration is the same as that of 500, for example, the first from the right to the left.
Processing units 150 to 5 and are arranged at intervals of mP (m is an arbitrary positive integer, P is a feed pitch of the workpiece).

Next, the first processing unit 150 to the fifth processing unit 550 have independent hydraulic cylinders 160, respectively.
˜560 are provided, and control valves 170 to 5 are connected from the hydraulic circuit 720.
The hydraulic fluid is formed so that it can be supplied and discharged via 70. The control valves 170 to 570 are electrically and controllably connected to the controller 700. Reference numeral 710 is a drive power supply. The first processing unit 150 to the fifth processing unit 55
The detection devices 180 to 580, such as light transmission sensors, are provided on the upstream side of the work material in the feed direction of 0, so that arrival of the front end of the work material and passage of the rear end of the work material can be detected. These detection devices 180 to 580 are formed so that detection signals can be input to the controller 700.

Next, reference numerals 50 and 650 denote pitch feed devices, which are constructed as described later, and which feed the workpiece in the first machining unit in the feed direction upstream side and the workpiece in the fifth machining unit. Provided on the downstream side in the direction. Pitch feed device 50,
The interval of 650 is arranged such that a strip-shaped workpiece (not shown) can be relayed and fed. The pitch feeding device 50,
Hydraulic cylinder that drives 650 (not shown, see below)
The control valve 7 controlled by the controller 700.
The hydraulic oil can be supplied and discharged from the hydraulic circuit 720 via 0 and 670.

4 and 5 are plan views and a front view of an essential part showing an example of the pitch feeding devices 50 and 650 in FIG. 3, and FIGS. 6 and 7 are sectional views taken along the line AA in FIG. It is a BB line sectional view. In FIGS. 4 to 7, reference numeral 51 denotes a fixed clamp device, which is the first clamp device shown in FIG.
The processing unit 150 to the fifth processing unit 550 are provided on the base 1 (see FIG. 1). A moving clamp device 52 is provided on the fixed clamp device 51 via a guide bar 53 projecting parallel to the feed direction of the workpiece 2 so as to be reciprocally movable in the longitudinal direction of the guide bar 53.

Reference numeral 54 is an end plate provided at the end of the guide bar 53, and a guide 55 for guiding the end edge of the workpiece 2 is provided on the upper surface thereof. Reference numeral 56 denotes a hydraulic cylinder, which is provided below the movable clamp device 52, and has a piston rod 57 provided on the end plate 54 and a piston (not shown) provided at the end thereof.
Slidably engage with.

Next, the structure of the fixed clamp device 51 will be described mainly with reference to FIG. Spring 6 in body 61
An actuating plate 63 that is urged upward via 2 is provided so as to be vertically movable, and a clamp plate 65 is provided on this actuating plate 63 through a support rod 64. The operating plate 63 is formed of a magnetic material such as a steel material. Reference numeral 66 is an electromagnet, which is provided below the operating plate 63 so that the magnetic pole portions 67 face each other. The movable clamp device 52 has the same configuration as the fixed clamp device 51.

The operation of the pitch feeding device shown in FIGS. 4 to 7 will be described. First, the front end of the strip-shaped workpiece 2 is exposed below the clamp plate 65 of the fixed clamp device 51 to operate the fixed clamp device. That is, FIG.
When the electromagnet 66 shown in FIG.
Against the urging force of the clamp plate 6
5 descends to hold the work piece 2 between the main body 61 and the work piece 2.

Next, the movable clamp device 52 is moved to the hydraulic cylinder 5 while the clamp plate 65a is biased upward.
Supply hydraulic oil to the right side of 6 and move it to the right. The reciprocating stroke of the hydraulic cylinder 56 is adjusted in advance so as to match the feed pitch P of the workpiece 2. Simultaneously with the stop of the moving clamp device 52, the clamp plate 65a is lowered, and the clamp plate 65 of the fixed clamp device 51 is raised (when the electromagnet 66 in FIG. 7 is de-energized, the operating plate 63 is moved upward by the spring 62). Energize).

When hydraulic oil is supplied to the left side of the hydraulic cylinder 56, the moving clamp device 52 moves to the left by the pitch P while holding the work material 2 in between, so that the work material 2 can be fed by the pitch. it can. Next, the fixed clamp device 51
The workpiece 2 is clamped by the above, the clamping of the workpiece 2 by the moving clamp device 52 is released, and the movable clamp device 52 is moved to the right. By repeating the above operation,
The work material 2 can be sequentially pitch-fed to the left.
The hydraulic cylinder 56, the fixed clamp device 51, and the movable clamp device 52 are formed so that their operations can be controlled in sequence by the controller 700 shown in FIG. 3, for example.

In FIG. 3, the pitch feed device 650 can pinch the front end of the work material while the pitch feed device 50 pitch-feeds the rear end of the work material (not shown). Enables relay feeding of materials. That is, the interval between the pitch feed devices 50 and 650 is equal to the pitch feed device 5
When 0 is clamped at the rear end of the work material and pitch-fed,
This is because the pitch feed device 650 is set to a distance that allows the tip of the work piece to be clamped.

Next, referring to FIG. 3, a mode in which a strip-shaped workpiece is progressively processed will be described. In FIG. 3, the first
In the machining unit 150, the pilot hole 3 (see FIG. 2, the same applies hereinafter), and in the second machining unit 250, the arcuate notch 4 and the third machining unit 3
The 50th to 5th processing units 550 are formed so as to perform the 1st to 3rd drawing processes, respectively.

In the fifth processing unit 550, an edge cutting process is performed at the same time as the third drawing process, and a predetermined bowl-shaped sheet metal product is punched. Further, in each machining unit, a guide pin engages with a pilot hole 3 formed in the workpiece for each operation thereof, thereby preventing undesired displacement of the workpiece and maintaining accuracy. To configure.

In FIG. 3, a strip-shaped work material (sheet in the drawing) is pitch-fed by a pitch feeding device 50,
When the tip passes the detection device 180, this detection signal is input to the controller 700. However, in this case, the first processing unit 150 is not immediately driven, and then the work material is fed by a preset predetermined pitch, and the work material is fed to the first processing unit 150.
When completely fed into the controller 70
0 command, via the control valve 170, the hydraulic circuit 72
0 is supplied to the hydraulic cylinder 160, the first processing unit is driven, and the pilot hole 3 (see FIG. 2) is drilled. During this time, since there is no workpiece in the second processing unit 250 to the fifth processing unit 550, it is in a stopped state.

Next, when the work material is pitch-fed and passes through the detecting means 280 of the second processing unit 250, the work material is fed by a predetermined pitch in the same manner as above, and the work material is fed into the second processing unit. When completely fed into 250, the second machining unit 250 is driven to machine the arcuate cut 4 (see FIG. 2). Thereafter, in the same manner, the third processing unit 350 to the fifth processing unit 550 are also driven at the time when the material to be processed is completely fed, and the predetermined first to third drawing processing is performed to perform the predetermined processing. A bowl-shaped product is obtained.

After the tip portion of the work material is sandwiched by the pitch feeding device 650 as described above, the work material is relay-fed from the pitch feeding device 50 to the pitch feeding device 650, and the above-mentioned progressive feeding is performed. Is continued. On the other hand, the following strip-shaped work material is mounted on the pitch feed device 50 and the same pitch feed is performed as described above, but a blank is left between the preceding work material and the following work material. Since this occurs, it causes inconvenience if the processing unit is driven in this blank portion. Therefore, in the present invention, the processing unit is selectively stopped as follows.

That is, when the rear end of the work material passes through the detecting device 180 of the first working unit 150 or is fed by one pitch thereafter, the work material is placed in the first working unit 150. Is not present in a perfect state, the controller 70 that receives this detection signal
In response to a command from 0, the control valve 170 is closed and the driving of the first processing unit 150 is stopped. With such a structure, it is possible to prevent the inconvenience caused by so-called blank driving. In the meantime, it goes without saying that predetermined processing is continuously performed in the other processing units.

The rear end of the material to be processed is the processing unit 25 after that.
Even when detected by the detection devices 280 to 580 of 0 to 550, their driving is stopped as in the first processing unit 150. Then, when the subsequent strip-shaped workpieces are completely fed, the driving is selectively restarted.

FIG. 8 is an explanatory plan view of an essential portion showing a second embodiment of the present invention, and the same parts are designated by the same reference numerals as those in FIG. In FIG. 8, reference numeral 950 denotes an intermediate pitch feeding device, which is provided, for example, between the third processing unit 350 and the fourth processing unit 450. Reference numeral 970 is a control valve, and 980 is a detection device. FIG. 8 shows a case of a strip-shaped work material having a smaller length in the longitudinal direction than the strip-shaped work material of FIG. 3, or a case where a gap between adjacent processing units is large. Is effective in. Also, a plurality of intermediate pitch feeding devices 950 may be provided.

That is, it is provided between arbitrary processing units, and depending on the dimension of the strip-shaped workpiece in the longitudinal direction,
Intermediate pitch feeder 950 and upstream pitch feeder 5
It is possible to relay feed of strip-shaped work material between 0 and the pitch feed device 650 (not shown, see FIG. 3) on the downstream side, or the distance between adjacent intermediate pitch feed devices 950. The distance should be set to.

The structure of the intermediate pitch feeding device 950 is as follows.
Basically, the pitch feeding device 5 shown in FIGS.
Although it is the same as 0,650, it is necessary to devise a little in the structure of the sandwiched portion of the work material. That is, it may be necessary to form the concave portion 70 in the main body 61 and the clamp plate 65 as shown in the left side view of FIG. This is due to the drawing process, for example, in the process of processing the workpiece 2.
This is because the convex portion 2a is formed on the workpiece 2. Therefore, when sandwiching, it may be necessary to avoid the convex portion 2a and utilize the edge portion of the workpiece 2.

In FIG. 9, reference numerals 71 and 72 each denote a nest, which is formed into a substantially U-shaped cross section in the longitudinal direction of the workpiece 2 and is detachably attached to the main body 61 and the clamp plate 65, respectively. . By setting the outer dimensions of the inserts 71 and 72 to be the same and only the inner dimension is set to a dimension that does not interfere with the convex portion 2a formed on the workpiece 2, the setup change time can be shortened. .

With the above-described structure, it is possible to carry out the progressive feed processing on the strip-shaped workpiece 2 as in the case of the above-described embodiment, and particularly the length of the workpiece 2 in the longitudinal direction is small. In this case, or even when the distance between the processing units is large, the intermediate pitch feeding device 950 can smoothly feed the workpiece 2 by relay. Note that FIG.
, The intermediate pitch feeding device 950 is
Although it is an example that it is activated or stopped by the signal of 80,
It may be configured such that it operates in conjunction with the pitch feed device 50 and the detection device 980 is omitted.

In the above embodiment, an example of drawing is described, but punching or punching or other processing may be used. Further, as the clamping means constituting the pitch feeding device, a spring and an electromagnet are shown, but the clamping means is not limited to this, and known clamping and gripping means may be used. Also, an example in which a U-shaped cassette is used as the cassette constituting the processing unit has been described, but a so-called die set type in which a movable holder is provided via a guide post standing upright on the substrate may also be used. The action is similar.

Further, the structure in which the positions of the front end portion and the rear end portion of the workpiece are detected by the detection device and the processing unit is selectively driven or stopped has been described.
Needless to say, program control may be performed in accordance with the length of the material to be processed, the arrangement interval of the processing units, etc. after the material to be processed is sent out by the pitch feed device provided on the upstream side.

[0045]

EFFECTS OF THE INVENTION The present invention has the structure and operation as described above. Therefore, even if a strip-shaped workpiece is used,
It is possible to effectively carry out progressive machining without causing wear of the punch and die, and it is expected that the operating rate and dimensional accuracy of the machining unit will be improved.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part showing an example of a progressive feeding apparatus which is one of the premise of the present invention.

FIG. 2 is an explanatory view of a main part showing a processing state of a work material,
(A) shows a plane and (b) shows a cross section.

FIG. 3 is an explanatory plan view of a main part of the first embodiment of the present invention.

FIG. 4 is a plan view of relevant parts showing an example of the pitch feeding device in FIG.

5 is a front view of the main parts showing an example of the pitch feeding device in FIG.

6 is a cross-sectional view taken along the line AA in FIG.

7 is a sectional view taken along line BB in FIG.

FIG. 8 is an explanatory plan view of a main part showing a second embodiment of the present invention.

9 is a left side view of the intermediate pitch feeding device shown in FIG.

[Explanation of symbols]

100, 200, 300, 400, 500 Processing unit 150, 250, 350, 450, 550 Processing unit 50, 650 Pitch feeder 950 Intermediate pitch feeder

Claims (2)

[Claims] 1. A plurality of processing units in which a cassette having a plurality of processing means is detachably provided in a main body, and mP (m) is provided in a feed direction of a workpiece in correspondence with a plurality of processing steps.
Is an arbitrary positive integer, P is arranged at intervals of the feed pitch of the work material, and the plurality of processing steps are sequentially performed by the plurality of processing units with respect to the pitch feed of the work material. In the configured progressive feeding device, a pitch feeding device for the workpiece is provided on each of an upstream side of the first machining unit in the feeding direction of the workpiece and a downstream side of the final machining unit in the feeding direction of the workpiece. Are provided at intervals such that strip-shaped workpieces can be relayed and fed, and a plurality of processing units are provided with independent drive means, respectively, and at least the upstream side of the first processing unit in the feed direction of the workpieces or the above-mentioned The upstream pitch feeder is provided with means for detecting that the workpiece is fed, and the driving means is formed so as to be selectively drivable via the control means operated by the signal of the detecting means, Progressive processing apparatus characterized by serial strip-shaped workpiece is configured to drive only the processing units present completely. 2. At least one between any processing units.
In addition to providing the intermediate pitch feeding device, the intermediate pitch feeding device and the pitch feeding device provided on the upstream and downstream sides in the feeding direction of the workpiece, and the adjacent intermediate pitch feeding device,
The progressive feeding apparatus according to claim 1, wherein the strip-shaped workpieces are arranged at an interval that enables relay feeding.