JP3285907B2 - 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-described structure, the structure is simpler than that of the conventional progressive die, and the production is easy. Although it has the advantage of being able to be processed, it has the following problems.

FIG. 7 is a sectional front view of a main part showing an example of the processing unit in FIGS. 1 and 2, and shows, for example, a cassette 108 of the processing unit 100. In FIG. 2, the processing unit 100 is shown to process two pilot holes 3, but in FIG. 7, the processing unit 100 is simplified to process one pilot hole.

In FIG. 7, reference numeral 11 denotes a punch body, which is formed in a hollow cylindrical shape with a bottom and has a punch 12 fixed to the bottom by means of bonding or caulking, and
The punch pad 13 and the pressing member 14 for adjusting the stroke are accommodated. A punch head 15 is provided above the pressing member 14, a screw 16 is provided at an intermediate portion, and the male screw 16 is screwed with a screw 17 so as to be provided at an upper end portion of the punch body 11. And the punch 12 is pressed.

Reference numeral 18 denotes a stripper, which is formed in a hollow cylindrical shape with a bottom, into which the punch body 11 is inserted so as to be slidable up and down.
Is formed to penetrate. Reference numeral 20 denotes a sleeve, which is fixed to the upper portion of the cassette 108 via an adhesive, and holds the stripper 18 so as to be slidable up and down. Reference numerals 21 and 22 denote springs which are interposed between the stripper 18 and the cassette 108 and between the pressing member 14 and the stripper 18, respectively, and formed so as to urge the stripper 18 and the punch body 11 upward. Further, a part of the outer peripheral surface of the punch body 11 and the stripper 18 is cut to form a parallel reference surface 23, and the parallel reference surface 23 is slidable with an end surface of a parallel reference plate 24 provided at the upper end of the cassette 108. The punch body 11 is formed so as to restrict the rotation of the punch body 11 by being brought into contact with the punch body 11. A die 25 has a through hole 26 through which the punch 12 can enter, and is fixed to the lower portion of the cassette 108 so as to face the punch 12. 27 is a detent pin, 2
8 is a fixing screw.

By operating the hydraulic cylinder 106 shown in FIG. 1, the punch head 15 is pressed downward through an operating rod (not shown) to cause the punch 12 to enter the through hole 26. Thus, the pilot hole 3 as shown in FIG. 2A can be formed in the workpiece 2. In this case, the elasticity of the spring 21 is
First, the stripper 1
8 comes into contact with the surface of the workpiece 2 and the spring 21 bends.
2 is bent, and the pilot hole 3 is processed. After a predetermined stroke of the punch 12 has been lowered, the hydraulic cylinder 1
When the operation of step 06 is released, the stripper 18 and the punch body 11 rise due to the elasticity of the springs 21 and 22. In this case, first, the punch body 11 rises, and the punch 12 is removed from the workpiece 2. Since the stripper 18 presses the workpiece 2 until the punch 12 is completely removed,
It is possible to prevent the workpiece 2 from undesirably moving or jumping up with the removal of the punch 12.

In general, the processing shape in the punching process or the punching process using the punch 12 and the die 25 having the above-described configuration is not a fixed shape, but is usually changed as appropriate according to the processing specifications. In such a case, it is needless to say that the punch 12 and the die 25 used in the processing unit need to be replaced in accordance with the processing specifications. The shape also needs to be changed.

In the conventional configuration shown in FIG.
In response to the change of the processing specification, not only the punch 12 and the die 25 but also the stripper 18 having the through hole 19 is provided.
Must also be converted. In this case, the exchange of the punch 12 and the die 25 is relatively difficult, but the exchange of the stripper 18 is very complicated, and the number of work steps required for the exchange is large. Further, since the stripper 18 has a hollow cylindrical configuration with a bottom and the through hole 19 needs to be formed corresponding to the position and shape of the punch 12,
There is a problem that the time and man-hour required for the production are large, and the cost is high.

In order to further improve the processing accuracy, it is necessary to match the axes of the punch 12, the through hole 19, and the through hole 26 of the die 25, and the angular positions in the horizontal direction. However, in the conventional configuration shown in FIG. 7, the die 25 is particularly set in the horizontal angular position by the detent pin 27, and the fixing screw 28 is fixed.
This is an aspect of fixing by. Therefore, at first glance, it seems that the setting of the axis and the angular position is performed accurately,
Since there is a small gap between the die 25 and the fixing screw 28 and the cassette 108, it is necessary to accurately set the axis and the angular position only by tightening the fixing screw 28. Is difficult. For this reason, fine adjustment is required after the die 25 is mounted on the cassette 108, and there is a problem that it requires much more man-hour and time than the replacement work.

Since the sliding surfaces of the stripper 18, the sleeve 20 and the punch body 11 are repeatedly slid up and down for each machining stroke, lubricating oil is generally supplied for smoothing the machining stroke and preventing wear. Is normal. Therefore, the lubricating oil may leak from the sliding portion and adhere to the workpiece 2 not only during the processing but also during the stop. Although the lubricating oil adhered can be removed by washing after finishing the processing, it may not be completely removed depending on the specifications of the product. In particular, for food or sanitary use, there is a demand that the work material 2 is not contaminated by the lubricating oil, and the above configuration has a problem that such a demand cannot be satisfied.

An object of the present invention is to provide a progressive processing apparatus which solves the above problems, facilitates replacement of punches and dies, improves processing accuracy, and prevents contamination of a workpiece. With the goal.

[0021]

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 execute the steps by the plurality of processing units, a stripper formed in a hollow cylindrical shape with a bottom and configured to be vertically slidable with respect to the cassette; A punch body interposed slidably up and down, a punch mounted at the lower end of the punch body so as to penetrate the bottom of the stripper, and a punch through a gap for inserting a workpiece. A body provided with at least a die provided in the cassette so as to face the body, and a plurality of through-holes formed in a hollow cylindrical shape through the inner and outer peripheral surfaces of the stripper; And a stripper plate removably attached to the lower end of the base plate, and the through hole is filled with a solid lubricant.

[0022]

According to the above construction, it is not necessary to replace the stripper body even when the punch is replaced, and so-called oilless driving becomes possible.

[0023]

FIG. 3 is a sectional front view of an essential part showing an embodiment of the present invention, and FIGS. 4 and 5 are sectional views taken along lines AA and BB in FIG. 3, respectively. The same reference numerals as those in FIG. 7 are used. 3 to 5, reference numeral 31 denotes a stripper body, which is formed in a hollow cylindrical shape.
At the lower end, a stripper plate 32 having a through hole 19 that allows the punch 12 to penetrate is provided detachably. The stripper body 31 has a plurality of through holes 33 penetrating through the inner and outer peripheral surfaces, and the solid lubricant 3 is provided in these through holes 33.
Fill 4 It is preferable that the solid lubricant 34 binds, for example, fine powder graphite with a binder.
The through hole 3 facing the parallel reference plane 23 is also provided on the parallel reference plate 24.
5 and the solid lubricant 34 is filled.

Next, reference numeral 36 denotes a punch body, which is formed in a solid cylindrical shape, and a punch holder 37 is detachably provided at the bottom,
The punch 12 is held. 38 is a punch plate,
The punch holder 37 is detachably provided at the bottom of the punch body 36, and holds the punch holder 37 inside the punch body 36. Punch body 3
A punch head 39 is integrally protruded from the upper end of 6, and a stroke adjusting screw 40 is screwed thereto. Die 25
Is detachably provided on a die holder 41 buried under the cassette 108 with a die plate 42 interposed therebetween, facing the punch 12 and the stripper plate 32.

Next, the manner of connection between the stripper body 31 and the stripper plate 32 will be described with particular reference to FIGS. FIG. 6 is a perspective view showing a connection portion between the stripper main body 31 and the stripper plate 32, and the same portions are denoted by the same reference numerals as those in FIGS. 4 to 6, reference numeral 43 denotes a positioning projection,
Reference numeral 44 denotes a positioning recess, which is provided corresponding to the stripper plate 32 and the stripper main body 31, respectively. 4
5 is a fixing screw and 46 is a screw hole. The positioning projections 43 and the positioning recesses 44 are formed with reference to a Y axis parallel to the parallel reference plane 23 and an X axis orthogonal to the Y axis. Also stripper plate 32
Is also machined with reference to the Y axis and the X axis. When the stripper plate 32 is attached to the stripper body 31, the fixing screws 45 may be fastened after the positioning projections 43 are fitted into the positioning recesses 44.

With the above configuration, the through hole 19, the positioning projection 43, and the positioning recess 44 are all formed in the Y direction.
When the stripper plate 32 is replaced, the punch 12
The positioning of the through hole 19 corresponding to the above can be performed automatically and with high accuracy. 4 to 6, an example in which the positioning projections 43 are provided on the stripper plate 32 and the positioning recesses 44 are provided on the stripper body 31 has been described. However, the positioning projections are provided on the stripper body 31 and the stripper plate 32 is provided. It is a matter of course that the positioning recess may be provided in the first position.

Although not shown, the positioning means by fitting the positioning projections and the positioning recesses between the die 25 and the die holder 41, and between the lower end surface of the punch body 36 and the punch plate 38. Is also provided. Therefore, when the die 25 and the punch plate 38 are replaced, the same positioning as that of the stripper plate 32 can be automatically performed with high accuracy.

Next, a method for fixing the sleeve 20 and the die holder 41 to the cassette 108 will be described with reference to FIG. Although the sleeve 20 and the die holder 41 are fixed to the cassette 108 via an adhesive, high-precision processing cannot be performed unless the fixing positions are correct. In the present invention, in order to fix the sleeve 20 and the die holder 41 with high accuracy, a fixing jig (not shown) is used as follows.

The fixing jig is, for example, a sleeve 20
It is formed in a cylindrical or cylindrical shape having an outer diameter dimension which can be vertically slidably fitted therein, and has a die holder 4 on its lower end surface.
1 is provided with a concave portion or a protrusion corresponding to the positioning protrusion or the positioning concave portion provided on the upper end surface. First, in a state where only the die holder 41 is fitted to the lower portion of the cassette 108, the fixing jig and the sleeve 20 are attached.
In this state, the fixing jig is inserted from above the cassette 108 until it reaches the die holder 41, and the positioning projection and the positioning recess are fitted. In this state, if an adhesive is filled and solidified in a gap previously provided between the outer peripheral surfaces of the sleeve 20 and the die holder 41 and the cassette 108, the sleeve 20 and the die holder 41 can be fixed at accurate positions. You can do it.

Next, in FIG. 3, by operating the punch body 36 downward, the workpiece 2 can be processed by the same operation as that in FIG. In this case, the vertical movement of the stripper body 31 causes the through hole 33 to move.
The solid lubricant 34 filled in the stripper body 31
Is supplied to the sliding surface between the sleeve 20 and the punch body 36 to smooth the sliding and prevent the sliding surface from being worn. The solid lubricant 34 is placed on the parallel reference plane 2.
3 and the sliding surface between the parallel reference plate 24. In this case, a small amount of the solid lubricant 34 is supplied to the sliding surface, and the solid lubricant 34 stays only on the sliding surface.

[0031]

Since the present invention has the above-described configuration and operation, it is possible to easily perform conversion of a punch, a die, and the like in accordance with a change in a processing shape of a workpiece, and to improve processing accuracy. . In addition, since the solid lubricant is used for the sliding portion of the movable member, there is an effect that contamination of the workpiece can be prevented and clean processing can be performed.

[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.

FIG. 3 is a sectional front view of a main part showing an embodiment of the present invention.

FIG. 4 is a sectional view taken along line AA in FIG.

FIG. 5 is a sectional view taken along line BB in FIG. 3;

FIG. 6 is a perspective view showing a connection portion between a stripper main body and a stripper plate.

FIG. 7 is a sectional front view of a main part showing an example of the processing unit in FIGS. 1 and 2;

[Explanation of symbols]

100, 200, 300, 400, 500 Processing unit 31 Stripper body 32 Stripper plate 34 Solid lubricant 36 Punch body

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B30B 13/00 B21D 37/18

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 cassette is formed in a hollow cylindrical shape with a bottom and is configured to be slidable up and down with respect to the cassette, and a punch body interposed slidably up and down within the stripper. ,
At least a punch mounted at the lower end of the punch body so as to penetrate the bottom of the stripper, and a die provided in the cassette so as to face the punch with a gap for inserting a workpiece interposed therebetween. The stripper is formed by a main body having a hollow cylindrical shape and having a plurality of through holes penetrating through the inner and outer peripheral surfaces, and a stripper plate detachably attached to a lower end portion of the main body. A progressive feeder, wherein the through hole is filled with a solid lubricant.