JPH05228802A - Progressive machining device - Google Patents

Abstract

PURPOSE:To insert a material to be machined safely and easily by attaching a pilot guide engaging with the pilot hole of a material to be machined to a machining unit, and disposing a machining unit for boring a large-diameter escape hole upstream in the direction of feeding a material to be machined. CONSTITUTION:A machining unit 50 for machining an escape hole is disposed upstream in the direction of feeding a material 2 to be machined in a machining unit 100 for machining a pilot hole in such a manner that the distance between the hole of the machining unit 100 and an escape hole 15 bored by the machining unit 50 may be nP. First, at the time of starting the progressive machining, a material 2 to be machined is inserted in a designated position between the machining unit 50 and plural machining units 100-500. Subsequently, the material 2 to be machined is fed by a distance nP to force the escape hole 5 to reach a pilot guide 11 and a hole 14, and a pilot hole is bored by a punch 10. Then, when the first pilot hole reaches the machining unit 200, the respective machining units 100, 200 are operated to machine a pilot hole and a notch.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, for example, when punching, bending and drawing a work piece, performs each step in one set of equipment, and sequentially performs the work piece in the next step. The present invention relates to a progressive machining apparatus that feeds a pitch to advance machining with additional machining and completes machining in the final process.

[0002]

2. Description of the Related Art Conventionally, when a sheet metal product having a predetermined shape is manufactured by punching, bending, drawing or forming a plate material 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 called a progressive die, and for example, one sheet metal product can be obtained for each stamp of the press, and therefore it has an advantage of extremely high efficiency.

In the above-mentioned conventional progressive feed die,
It has the advantages that the production speed is high, the delivery time is short after the work material is input and the processing is completed, and the number of work in process in the middle of the press working is small, so that a small number of people can mass-produce. There is a problem. That is, since the structure is one in which a plurality of pairs of punches and dies are incorporated into one mold, the mold structure becomes extremely complicated, high precision mold manufacturing technology is required, and the manufacturing period becomes long, and the manufacturing cost is high. Will be very expensive.

Further, even in the case of partial damage, repair and adjustment of the mold, it is necessary to disassemble the whole 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 if a dedicated die is manufactured each time, the die cost becomes high, and the demand is gradually increasing in recent years. There is a problem that it cannot meet the so-called FMS production system that is increasing.

In order to solve such a problem, the present applicant has already filed an application for a progressive working 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
-121761, etc.). 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-
Each of the processing units 500 is disposed 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 taking 00 as an example. Reference numeral 101 denotes a main body, which is formed in a substantially U shape and has a dovetail shape at the lower end 102
Is integrally provided with the dovetail groove 103 provided on the base 1 so that the movement of the workpiece can be adjusted in the feeding direction.
In addition, it is formed so that movement of the work material in the direction perpendicular to the feed direction can be restricted. 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 part.
Is provided so as to be movable 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 provided on 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, by mounting the cassette 108 on the main body 101 via a positioning member (not shown, reference numerals 309 and 310 in the processing unit 300), predetermined positioning can be performed, and the position is fixed by tightening the clamp screw 111. It is configured to get. 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.

FIG. 2 is an explanatory view of a main part showing a processing state of a work material. (A) shows a plane, (b) shows a cross section, and the same parts are designated by the same reference numerals as those in FIG. Indicate. Figure 2
2 is a material to be processed, which is intermittently pitch-fed at a pitch P in the arrow direction. That is, in FIG.
Pitch feed is performed on the gap between a pair of punches and dies provided on the cassette 108 (similarly for other cassettes). 1 and 2, the processing units 100 to 500
Are formed so as to correspond to the machining process of the pilot hole 3, the machining process of the arcuate cut 4, and the first to third drawing processes, respectively.

FIG. 3 is an enlarged vertical sectional view showing a main part of the processing unit 100 in FIG. 2, and the same parts are designated by the same reference numerals as those in FIGS. 1 and 2. In FIG. 3, reference numeral 8 denotes a punch, which is composed of a stripper 9 and a pilot punch 10 and a pilot guide 11 which are provided in the stripper 9 so as to be vertically movable relative to each other. Next, 12 is a die, and the pilot punch 1
0 and holes 13, 1 to be engaged with the pilot guide 11
4 are provided. The center distances between the pilot punch 10, the pilot guide 11, and the holes 13 and 14 are P.

When the machining unit 100 is operated by the above structure, the pilot guide 11 is engaged with the pilot hole 3 already formed in the workpiece 2 and the hole 14 provided in the die 12 when the punch 8 descends. Then, the pilot punch 10 is lowered to form the next pilot hole in the workpiece 2. Therefore, it is possible to prevent undesired displacement of the work material 2 and maintain the accuracy.

Next, in the processing unit 200, the arcuate cut 4 is processed. And processing unit 300
In the above, the first drawing process is performed to form a bowl-shaped projection 5 on the workpiece 2 and the arc-shaped cut 4
Expands its width and changes into an arc-shaped 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. Although not shown in the drawings, edge cutting and other processing are performed to obtain a desired bowl-shaped sheet metal product. Processing units 200-5
Also in 00, it is needless to say that by providing a guide that engages with the pilot hole 3, positioning for ensuring a predetermined accuracy is performed.

[0012]

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

FIG. 4 is an enlarged vertical sectional view showing a main part of the processing unit 100 when starting the progressive processing apparatus in FIG. 1, and the same portions are denoted by the same reference numerals as those in FIG.
First, the workpiece 2 is inserted, and the machining unit is operated with the tip 2a held at a position in front of the hole 14 with which the pilot guide 11 engages, and the pilot punch 10 opens a pilot hole (not shown). To process. Next, when the workpiece 2 is moved in the direction of the arrow by about P and the pilot hole that has already been drilled is positioned so as to be concentric with the pilot guide 11 and the machining unit 100 is operated, the pilot guide 11 causes the pilot hole to move. And the next pilot hole is processed in a state in which the workpiece 2 is prevented from moving. Thereby, the distance between the centers of the pilot holes can be accurately set to P.

In the processing mode shown in FIG. 2, the pilot hole 3 firstly drilled in the workpiece 2 is
The machining units 100 and 200 are simultaneously operated in a state where they reach a pilot guide in the machining unit 200 (a position corresponding to the two left pilot holes 3 in the machining unit 200, though not shown). In the same manner, when the processing units 300, 400, ... Are sequentially operated simultaneously with the processing unit of the preceding stage, and the processing unit of the final stage can be simultaneously operated for the workpiece 2. The insertion of the work material 2 is completed, and thereafter, the progressive feeding in the steady state can be performed.

However, in the above method, the work of inserting the tip 2a of the work piece 2 into each of the work units is complicated, and the pilot holes formed first in the work piece 2 are provided in the respective work units. It is necessary to confirm that it is concentric with the pilot guide provided in the. Further, since the work piece 2 has uneven portions processed for each processing unit, there is a problem that the work of inserting the work piece 2 into the next processing unit gradually increases in complexity.

That is, the work piece 2 must be manually inserted into the respective processing units, and the work piece 2 is restricted in its movement path from lateral swinging. Since there is a material guide for this purpose, an ejector member for raising the work piece 2 from the upper surface of the die, and other obstacles, it is a dangerous work that easily causes an accident. Therefore, it takes a lot of time and man-hours to reach a steady state, and there is a problem in that the work efficiency of the main body of the progressive processing apparatus is reduced.

The present invention solves the above-mentioned problems and allows the work material to be inserted safely and easily at the time of starting.
It is an object of the present invention to provide a progressive feeding device capable of significantly reducing the time and man-hours required for setup work and greatly increasing the work efficiency of the main body.

[0018]

In order to achieve the above object, in the present invention, a plurality of processing units, each of which has a cassette provided with a plurality of processing means and which is detachably provided in a main body, are provided with a plurality of processing steps. In the feed direction of the work material at intervals of mP (m is an arbitrary positive integer, P is the feed pitch of the work material), and the plurality of machining operations are performed with respect to the pitch feed of the work material. In a progressive machining apparatus configured to sequentially perform steps by the plurality of machining units, each machining unit is provided with a pilot guide that engages with a pilot hole formed in a workpiece We adopted a technical means of installing a processing unit on the upstream side of the processing unit in the workpiece feed direction in order to machine an escape hole with an inside diameter larger than the inside diameter of the pilot hole.

In the present invention, the installation position of the processing unit for processing the clearance hole is preferably selected so that the center distance between the pilot guide and the clearance hole is nP (n is an arbitrary positive integer).

[0020]

With the above structure, the workpiece can be pre-inserted in the unprocessed state from the processing unit at the front stage to the processing unit at the last stage, and the trial machining and adjustment work can be performed sequentially from this state. It is possible to perform the transition to the steady progressive machining state quickly.

[0021]

FIG. 5 is a plan view of an essential part showing an embodiment of the present invention, in which the same parts are designated by the same reference numerals as those in FIGS. In FIG. 5, reference numeral 50 denotes a relief hole machining unit, which is configured as described later, and is provided on the upstream side in the feed direction of the workpiece 2 of the machining unit 100 for pilot hole machining.
Like the processing units 100 to 500, they are provided on the base 1. The arrow indicates the feeding direction of the workpiece 2.

FIG. 6 is a partial cross-sectional side view showing an example of the processing unit 50 for processing the clearance hole in FIG. 5, and the same portions are denoted by the same reference numerals as those in FIG. In FIG. 5, 5
Reference numeral 1 denotes a main body, which is formed in a substantially U shape, is provided on a base 52 provided on the base 1, and is formed so as to be movable in the arrow direction, that is, the feeding direction of the workpiece 2 (the direction perpendicular to the paper surface). 5
Reference numeral 3 denotes a motor, which is provided on the base body 52 and allows the main body 51 to move via a moving screw (not shown). The base 52 has a dovetail groove 103 and a dovetail groove 54 provided on the base 1.
By engaging with the workpiece 2 through the engagement, it is possible to adjust the movement in the feed direction of the workpiece 2 and to restrain the movement of the workpiece 2 in the direction perpendicular to the feed direction.

Next, reference numeral 55 is a cassette, which is formed in a substantially U-shape, has a stripper 56 and a punch 57 at the upper part thereof so as to be vertically movable, and has a die 58 at the lower part. Punch 5
7 is formed so as to be vertically movable relative to the stripper 56, and the punch 57 and the die 58 are provided with relief holes (not shown) having an inner diameter larger than the inner diameter of the pilot hole 3 shown in FIG. 2 (a). The material 2 is formed so as to be drilled. 59
Is a hydraulic cylinder, which is provided on the upper part of the main body 51, and is provided with the power transmission rod 60 to remove the stripper 56 and the punch 5.
7 is formed to be drivable. With the above structure, one relief hole is formed in the workpiece 2 at the position shown in FIG. 6, and then the main body 51 is moved to the right by the motor 53. Can be drilled.

FIG. 7 is an explanatory view of a state at the time of starting the progressive feeding processing for the work material in the embodiment of the present invention, (a)
Shows a plane, (b) is a longitudinal cross section of a main part of the processing unit 100, and the same portions are denoted by the same reference numerals as those in FIGS. 2 to 5. In FIG. 7, the processing unit 200-
The details of 500 are omitted. In FIG. 7, the processing unit 50 is located at the center of the hole 14 (pilot guide 11) of the processing unit 100 and the escape hole 15 to be formed by the processing unit 50 on the upstream side in the feeding direction of the workpiece 2 of the processing unit 100. The distance is set to nP.

First, when starting the progressive machining, the workpiece 2 is processed from the machining unit 50 to the machining units 100 to 500.
It is inserted in the predetermined processing position over. In this case, since the workpiece 2 is not processed at all, the workpiece 2 can be easily inserted even if the obstacle as described above exists in the insertion path. Then, the escape hole 15 is formed in the workpiece 2 in the same manner as described with reference to FIG.

Next, the work material 2 is fed by nP in the direction of the arrow by a feeding device (not shown) or manual feeding,
The escape hole 15 formed in the work piece 2 is the processing unit 10
It reaches a position facing the pilot guide 11 and the hole 14 of 0. When the machining unit 100 is operated in this state, the punch 10 punches a pilot hole (not shown, see reference numeral 3 in FIG. 2A) in the workpiece 2. In this case, since the escape hole 15 is formed to have an inner diameter larger than the inner diameters of the pilot guide 11 and the hole 14, even if the pilot guide 11 descends, it does not interfere with the escape hole 15.

After that, when the workpiece 2 is pitch-fed by the feeding device and the next pilot hole is drilled, the pilot guide 11 is inserted into the pilot hole drilled as described above.
Since it is carried out in the state of being engaged, the pilot hole interval is accurately set to the dimension P. Next, when the pilot hole firstly formed in the workpiece 2 reaches the position of the pilot guide of the machining unit 200, the machining unit 100,
For example, the pilot hole 3 and the arcuate cut 4 shown in FIG. 2 can be processed by operating 200.

Thereafter, the successive machining units 300 to
Increase the number of simultaneous working units per 500,
After the operation of the processing unit at the final stage, it is possible to completely shift to a steady state. Since the escape hole 15 to be formed in the work piece 2 prevents interference with the pilot guide 11 in the processing unit 100,
Only the number corresponding to the number of installed pilot guides 11 of the processing unit 100 is required, and the subsequent operation of the processing unit 50 is stopped.

In this embodiment, an example in which the machining unit 50 for machining the escape hole 15 is operated by the hydraulic cylinder 59 is shown. However, mechanical means may be used as the operating means of the punch 57, and the operating load is small. In some cases it may be manual. Further, a plurality of escape holes 15 may be formed at the same time.
The escape hole 15 at the position corresponding to the pilot guide 11 of
Any material can be used as long as it can be drilled. Further, as shown in FIG. 7A, the position of the escape hole 15 is determined by the pilot guide 11
It is preferable that the distance between the hole 14 and the nP that engages with the work piece 2 be the pitch feed of the work material 2, but the present invention is not necessarily limited to this. If

[0030]

EFFECTS OF THE INVENTION The present invention has the configuration and operation as described above. Therefore, at the time of starting the progressive processing apparatus, the unprocessed workpiece is processed from the frontmost processing unit to the last processing unit. , Can be inserted in advance,
The work of inserting the work piece can be safely and easily performed. Further, since trial machining and adjustment work can be easily performed, the time and man-hours required for setup work can be greatly reduced, and the working efficiency of the main body of the progressive machining apparatus can be greatly increased.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part showing an example of a progressive processing apparatus that is a 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 the plane and (b) shows the cross section.

FIG. 3 is an enlarged vertical sectional view showing a main part of the processing unit 100 in FIG.

FIG. 4 is an enlarged vertical cross-sectional view showing a main part of a processing unit 100 when starting the progressive processing apparatus in FIG.

FIG. 5 is a plan view of an essential part showing an embodiment of the present invention.

FIG. 6 is a processing unit 50 for processing a clearance hole in FIG.
It is a partial cross-sectional side view which shows the example of FIG.

7A and 7B are explanatory views of a state at the time of starting the progressive feeding processing on the material to be processed in the embodiment of the present invention, FIG. 7A shows a plane, and FIG.

[Explanation of symbols]

 50 machining unit 100 machining unit 200 machining unit 300 machining unit 400 machining unit 500 machining unit 3 pilot hole 11 pilot guide 15 escape hole

Claims (2)

[Claims] 1. A plurality of processing units in which a cassette provided with a plurality of processing means is detachably mounted on a main body, and mP (m
Is an arbitrary positive integer, P is arranged at intervals of the feed pitch of the workpiece, and the plurality of processing steps are sequentially performed by the plurality of processing units for the pitch feed of the workpiece. In the configured progressive-feed machining apparatus, each machining unit is provided with a pilot guide that engages with a pilot hole formed in the workpiece, and a pilot guide is provided on the upstream side of the workpiece feeding direction of the machining unit for pilot hole machining. A progressive-feed machining apparatus comprising a machining unit for machining an escape hole having an inner diameter larger than the inner diameter of the hole. 2. The progressive machining apparatus according to claim 1, wherein the center distance between the pilot guide and the clearance hole of the pilot machining unit is nP (n is an arbitrary positive integer).