JP3285901B2 - Progressive processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, when performing a process such as punching and bending drawing on a work material, performing each process in a set of devices, and sequentially performing the work material in the next process. The present invention relates to a progressive-feed processing apparatus that performs pitch-feeding to perform additional processing and completes processing in a final step.

[0002]

2. Description of the Related Art Conventionally, when a sheet metal product having a predetermined shape is manufactured by punching, bending, drawing, and forming a sheet material made of a structural material such as a steel sheet, several steps are required. Is normal. When the production quantity of such sheet metal products is large, each step or stage is individually processed in one processing die, and the workpiece is sequentially sent to the next stage to add processing. Then, means for completing the processing in the final stage is employed. Such a processing die is called a progressive die. For example, since one sheet metal product can be obtained for each stamp of the press, there is an advantage that the efficiency is extremely high.

In the above-mentioned conventional progressive die,
While the production speed is high, the delivery time from the input of the workpiece to the completion of processing is short, the work in the middle of the press process is small, and the mass production can be performed by a small number of people. Problems.
That is, since a plurality of pairs of punches and dies are incorporated in one mold, the mold structure becomes extremely complicated, requires high-precision mold manufacturing technology, increases the manufacturing period, and increases the manufacturing cost. Is expensive.

[0004] Also, when the mold is partially damaged, repaired, or adjusted, it is necessary to disassemble the entire mold, and these operations are complicated, which requires a great deal of time and man-hours. Furthermore, in the case of small-scale production of many kinds, when the shape and dimensions of the workpieces are slightly different, if the form of manufacturing a dedicated mold is adopted each time, the cost of the mold becomes relatively high. However, there is a problem that it cannot respond to the so-called FMS production system which is increasing.

In order to solve such a problem, the present applicant has already filed an application for a progressive-feed processing apparatus having a simple structure and capable of easily performing partial adjustment and the like (for example, Japanese Patent Application No. 2002-313,197). Hei 2-121760, 2-1
No. 21762). The present invention has been further improved based on these improved inventions.

FIG. 1 is a perspective view of an essential part showing an example of a progressive machining apparatus which is a premise of the present invention. In FIG.
Reference numerals 500 denote processing units, which are arranged on the base 1 at intervals of, for example, 2P (P is the feed pitch of the workpiece) in the feed direction of the workpiece (not shown). Each of these processing units 100 to 500 has one corresponding to a plurality of processing steps.
Although a pair of punches and dies are provided, the processing unit 1
00 will be described as an example. Reference numeral 101 denotes a main body, which is formed in a substantially U shape, and has a dovetail shape at a lower end portion.
Are integrally provided, and can be moved and adjusted in the feed direction of the workpiece by engaging with the dovetail groove 103 provided in the base 1.
In addition, it is formed so as to be able to restrain the movement of the workpiece in the direction perpendicular to the feed direction. 104 is a movement adjusting device, and 105 is a clamp device. Reference numeral 106 denotes a hydraulic cylinder, which is provided at the upper end of the main body 101. A position measuring device 107 is provided on a side surface of the hydraulic cylinder 106.

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.
Are provided so as to be able to move up and down, and a punch or a die or a pair (neither is shown) forming a pair with the die is provided at a lower portion, and is detachably provided on the main body 101. The positioning of the cassette 108 is performed by engagement with positioning members 309 and 310 as shown in the processing unit 300. 111 is a clamp screw. That is, the cassette 108 is moved to a positioning member (not shown,
00 (see reference numerals 309, 310).
In addition, a predetermined positioning can be performed by attaching to the clamp screw 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 vertically movable punch or die.

FIGS. 2A and 2B are explanatory views of a main part showing a processing state of a workpiece, in which FIG. 2A shows a plan view, FIG. 2B shows a cross section, and the same parts are denoted by the same reference numerals in FIG. Indicated by In FIG. 2, a workpiece 2 is intermittently fed at a pitch P in the direction of the arrow. That is, in FIG. 1 described above, the gap is fed between a pair of punches and a die provided in the cassette 108 (the same applies to other cassettes). 1 and 2, the processing units 100 to 100
Reference numeral 500 is formed so as to correspond to the processing step of the pilot hole 3, the processing step of the arc-shaped notch 4, and the first to third drawing steps, 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 located at a position P on the downstream side in the feed direction of the workpiece 2.
And a guide (not shown) that engages the Therefore, each time the processing unit 100 is operated, the pilot hole 3 is sequentially drilled, and the guide engages with the drilled pilot hole 3 to prevent an undesired displacement of the workpiece 2 and improve accuracy. Can be held.

Next, in the processing unit 200, the arc-shaped notch 4 is processed. And the processing unit 30
At 0, the first drawing is performed, a bowl-shaped projection 5 is formed on the workpiece 2, and the arc-shaped notch 4 expands its width to change into an arc-shaped groove 6. Further, in the processing unit 400, the second drawing 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 is performed, and the height of the protrusion 5 is formed to a predetermined size. Thereafter, although not shown, edge cutting and other processes are performed to obtain a predetermined bowl-shaped sheet metal product. Processing units 200 to 500
Also in the above, it is a matter of course that positioning for ensuring predetermined accuracy is performed by providing a guide that engages with the pilot hole 3.

[0011]

According to the progressive machining apparatus having the above structure, the structure is simpler than that of a conventional progressive die, and the production is easy. Although it has the advantage that it can be processed, there are the following problems in the progressive processing including drawing.

FIGS. 3A and 3B are cross-sectional views showing the state in which drawing is performed. FIG. 3A shows a state before processing, FIG. 3B shows a state during processing, and FIG. 3C shows a state after processing. Is shown. In FIG. 3, reference numeral 11 denotes a punch, and 12 denotes a die. For example, the processing units 100 and 200 shown in FIGS.
Corresponding to Next, reference numeral 13 denotes a drawing die, and 14 denotes a drawing punch, which corresponds to, for example, the processing units 300 to 500 in FIGS. A spring 1 is provided in the drawing die 13.
A knockout pin 16 is provided, which is urged downward by 5 and formed to be slidable up and down. Next, the aperture punch 14 is fixed on the holding plate 17, and a wrinkle holder 18 is interposed on the aperture punch 14. The wrinkle holder 18 is moved by a movable plate 20 through a rod 19 penetrating the holding plate.
The spring 21 is formed so as to be able to move up and down and to be urged upward by a spring 21.

With the above configuration, when processing is performed,
From the state shown in FIG.
3 is operated downward by the hydraulic cylinder 106 shown in FIG. 1 or the like, processing is performed as shown in FIG. 3B. That is, the punching process is performed by the engagement between the punch 11 and the die 12, and the drawing process is performed by the drawing die 13 and the drawing punch 14. In the drawing process, the drawing die 13 and the wrinkle retainer 18 and the knockout pin 16 and the drawing punch 14 come into contact with each other via the workpiece 2. Is performed. In this case, since the wrinkle retainer 18 presses the workpiece 2 against the lower end surface of the drawing die 13 by a predetermined spring pressure, the workpiece 2 is allowed to move in the horizontal direction at the corresponding portion, and the workpiece 2 is moved. The plastic deformation is advanced, and the generation of undesired wrinkles in the workpiece 2 is prevented. h is the drawing depth or the height of the protrusion 5. Next, after processing is completed, as shown in FIG.
When the hydraulic press 1 and the drawing die 13 are moved upward by the backward movement of the hydraulic cylinder 106 and the like, the workpiece 2 can be pitch-fed. In this case, since the knockout pin 16 is urged downward by the spring 15, the protrusion 5 can be easily discharged from the drawing die 13.

As is apparent from FIG. 3B, during the drawing, the workpiece 2 is pushed down by the drawing depth h from the level before the processing, and the gap between the punch 11 and the drawing die 13 is reduced. Fig. 3
Return to the old level as shown in (c). When such a vertical movement of the workpiece 2 occurs, a tensile stress, a compressive stress, and a bending stress are generated in the workpiece 2, which causes a problem that deformation and a reduction in dimensional accuracy are caused.
As a means for solving such a problem, it is not preferable to increase the interval between the processing units because the entire apparatus becomes longer and the occupied space increases.

As is apparent from FIG. 3, the drawing die 13 reciprocates by a stroke of 2h + α during drawing. Here, α is a gap, which is set in order to smoothly feed the workpiece 2 at the pitch. That is, for the drawing depth h, the drawing die 13 needs a stroke of 2h + α. Generally, in a hydraulic cylinder, the larger the stroke, the larger the required energy. In the progressive machining apparatus which is the subject of the present invention, the plurality of machining units are provided with independent drive means, respectively. In the processing means including the processing unit, all the strokes require 2h + α or more, and there is a problem that the required pressure oil amount becomes large.

The present invention solves the above-mentioned problems, and in a progressive processing including a drawing step or a bending step, there is no change in the processing level of a workpiece, and a progressive processing apparatus capable of reducing energy consumption. The purpose is to provide.

[0017]

In order to achieve the above-mentioned object, according to the present invention, a plurality of processing units each having a cassette having a plurality of processing means detachably mounted on a main body are provided in a plurality of processing steps. In the feed direction of the workpiece, mP (m is an arbitrary positive integer, P is the feed pitch of the workpiece) is disposed at intervals of mP, and the plurality of processes are performed with respect to the pitch feed of the workpiece. In a progressive feeding apparatus configured to sequentially perform the steps by the plurality of processing units, a punch driving unit and a die driving unit are provided to face a punching unit or a die driving unit in a processing unit corresponding to a drawing step or a bending step, In addition, a technical means is adopted in which these driving means are formed so as to be interlockable.

[0018]

According to the above construction, the processing level of the material to be processed is constant, high-precision processing can be performed, and energy consumption can be reduced.

[0019]

4 and 5 are a sectional front view and a side view, respectively, showing a main part of an embodiment of the present invention. 4 and 5, reference numeral 301 denotes a main body of the processing unit, which corresponds to the main body for the first drawing in FIG. The main body 301 of the processing unit is in a dovetail groove 303 provided in the base 1 and is mounted via a dovetail 302. A cassette 308 provided with a deep drawing die and a punch, which will be described later, is fixed to a predetermined position of the main body 301 via positioning members 309 and 310 via a clamping screw 311. Reference numeral 306 denotes a hydraulic cylinder that operates a die described later.

Next, reference numeral 31 denotes a die attaching member, which fixes a drawing die 32 at the lower end thereof and a cassette 30.
8 is provided so as to be vertically slidable via a sleeve 33 fitted to the sleeve 8. The die attaching member 31 is connected to the rod 35 which engages with the hydraulic cylinder 306 via the connecting member 34. Reference numeral 36 denotes a knockout pin, and the die attaching member 31 and the die 3
It is formed so as to be vertically slidable in 2 and urged downward via a spring 37. Reference numeral 38 denotes a position measuring device, which is provided above the hydraulic cylinder 306.

Numeral 39 denotes a holding member which is fixed to the lower portion of the cassette 308 and has a wrinkle holder 40 and a punch 4.
1 are held so as to be vertically movable. Next, reference numerals 42 and 43 denote a wrinkle holding hydraulic cylinder and a punch hydraulic cylinder, respectively, which are provided at a lower portion of the main body 301, and each
And directly or via a connecting member such as a rod. A position measuring device 44 is provided below the punch hydraulic cylinder 43. The position measuring devices 38 and 44 are configured to detect upper and lower working ends of the die 32 and the punch 41, respectively, and to control application and release of hydraulic pressure to the hydraulic cylinder 306 and the punch hydraulic cylinder 43.

With the above configuration, first, the hydraulic cylinder 30
6, the die 32 and the knockout pin 36
Are lowered, and their lower ends are brought into contact with the workpiece 2.
The workpiece 2 is clamped between the holding member 39, the wrinkle holder 40 and the punch 41. Next, pressure oil is introduced into the wrinkle holding hydraulic cylinder 42 and the punch hydraulic cylinder 43 to urge the wrinkle holding 40 and the punch 41 upward. As a result, the workpiece 2 is pinched by the wrinkle retainer 40 and the die 32, and the punch 41 enters the die 32 against the urging pressure of the spring 37 to perform the first drawing (the processing unit in FIG. 2). Forming of the protrusion 5 by 300)
Is performed.

FIG. 6 is a sectional view of a main part showing a state of the first drawing, and the same parts are denoted by the same reference numerals as in FIGS. 4 and 5. As is clear from FIG. 6, by the first drawing,
Even if the punch 41 enters the die 32, the level of the workpiece 2 is substantially the same as that before processing, and the level of the workpiece 2 shown in FIG. No deformation of the material 2 occurs.

After the completion of the first drawing, the application of the hydraulic pressure to the wrinkle holding hydraulic cylinder 42 and the punch hydraulic cylinder 43 is released, the urging of the wrinkle holding 40 is released, and the punch 41 is lowered. The knockout pin 36 is urged downward by the spring 37. When the hydraulic cylinder 306 is operated in the reverse direction at the same time as or after a short period of time as described above, the die 32 is raised, and at the same time, the workpiece 2 is discharged from the die 32 by the spring 37. The state shown in the figure is restored, and the first drawing process is completed.

FIG. 7 is a sectional view of a main part showing a state of the second drawing, and the same parts are denoted by the same reference numerals as in FIG. After the completion of the first drawing as shown in FIG. 6,
In FIGS. 1 and 2, the workpiece 2 is pitch-fed to a processing unit 400 corresponding to the second drawing step, and the second drawing on the projection 5 is performed. 7, for easy understanding, the reference numerals of the respective constituent members are indicated by the reference numerals in FIG. 6 showing the first drawing process.

First, as shown in FIG. 7A, the die 32 and the knockout pin 36 are lowered, and the knockout pin 36 contacts the upper end of the projection 5 formed by the first drawing. Next, as shown in (b), the wrinkle holder 40 and the punch 41 rise and enter the projection 5 to reach the upper end of the projection 5. From this state, the punch 41 further rises and enters the die 32 as shown in (c), a part of the second drawing is performed, and the height of the projection 5 is increased.

In this case, the wrinkle retainer 40 presses the outer periphery of the top of the protrusion 5 with the die 32 at a predetermined pressure with a predetermined pressure, thereby allowing the workpiece 2 to slide and plastically deform while preventing wrinkles from occurring. Next, as shown in (d), the die 32 descends, and the second drawing is continued and completed while holding the workpiece 2 with the wrinkle holder 40. After the second drawing, the punch 41
Is lowered and the die 32 is raised. In this case, the knockout pin 36 presses the protrusion 5 and
2 and return to the state of FIG. During the second drawing, the level of the workpiece 2 is substantially the same as in the first drawing. Thereafter, the third drawing is performed in the same procedure as described above.

In this embodiment, an example of drawing is described, but the present invention can be similarly applied to bending and compression. Also, an example in which a hydraulic cylinder is used as the driving means has been described. However, a hydraulic cylinder containing air, water, or the like may be used, and a driving means other than the hydraulic cylinder may be used. Further, the arrangement intervals of the processing units can be generally set to mP (m is a positive integer), and the arrangement intervals may be changed as necessary.

[0029]

Since the present invention has the configuration and operation as described above, the following effects can be obtained.

(1) In the progressive processing including drawing or bending, the stroke of the driving means can be reduced, and the energy consumption can be reduced. (2) Since the processing level of the workpiece is substantially the same plane, and undesired deformation or distortion is not generated in the workpiece, the processing accuracy can be improved.

(3) Since the stroke in the processing means such as the drawing is small, it is easy to manufacture a mold and the like.
The dimensional accuracy can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part showing an example of a progressive feed processing apparatus as a premise of the present invention.

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

FIGS. 3A and 3B are cross-sectional views illustrating a state where a drawing process is performed, in which FIG. 3A illustrates a state before processing, FIG. 3B illustrates a state during processing, and FIG. 3C illustrates a state after processing.

FIG. 4 is a sectional front view of a main part showing an embodiment of the present invention.

FIG. 5 is a side view of a main part showing an embodiment of the present invention.

FIG. 6 is a sectional view of a main part showing a state of a first drawing process.

FIG. 7 is a sectional view of a main part showing a state of a second drawing process.

[Explanation of symbols]

100, 200, 300, 400, 500 Processing unit 306 Hydraulic cylinder 32 Die 41 Punch 43 Punch hydraulic cylinder

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B30B 13/00 B21D 22/20

Claims (1)

(57) [Claims] 1. A plurality of processing units each having a cassette provided with a plurality of processing means detachably mounted on a main body, and having a plurality of processing units corresponding to a plurality of processing steps in a feeding direction of a workpiece in the direction of mP (m
Is an arbitrary positive integer, and P is disposed at intervals of the workpiece feed pitch) so that the plurality of processing steps are sequentially performed by the plurality of processing units for the pitch feed of the workpiece. In the progressive feeding apparatus thus configured, a punch driving unit and a die driving unit are provided facing each other in a processing unit corresponding to a drawing process or a bending process, and these driving units are formed so as to be interlocked. Progressive processing equipment.