JPS6016856B2 - Positioning device for the tool of a press for punching out metal plates from strips or strips of material, such as strips of tin plate, etc., which are fed intermittently through the tool. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tool positioning device for a press for punching metal plates from a strip or strip of material, such as a strip of tin plate or the like, which is fed intermittently through the tool. wherein the tool is rotatably supported about an axis of rotation perpendicular to the material feed plane when installed in the press machine, and the axis is further provided with a positioning mechanism attached to the tool or tool carrier. The device allows arbitrary displacement of strips or strips of material, such as strips of tinplate, in the plane in which they are fed.

Particularly when using strip material for stamping metal bevels, there is an important problem in efficiently utilizing the material and minimizing the stamping time.

For the above reasons, efforts have been made to select the shape of the slopes in such a way that the strip material is most efficiently utilized by abutting the side edges of each of two adjacent slopes.

Triangular and similar platelet shapes are considered here by way of example. In order to cut out the above-mentioned slope, a punching method in which the slope changes the so-called direction (Schuler, Hambuch,
It is known that this process is carried out on page 14).

In this method, the tin plate is first fed once through the tool, then rotated through 180° in the cutting plane and then returned through the tool again, with the same small plate as in the previous tool. are punched out from the area of material left over from the previous cutting process. However, the above-mentioned method not only has the disadvantage that the strip material has to be fed through the tool twice in order to obtain one cutout slope, but also is economically suitable only for strip material. Should.

Furthermore, the press machine has two tools (2
It is also said that the machine is equipped with a heavy-duty machine and that two cuts are made for each cutting process.

In order to perform the above two types of cutting, a significantly larger press machine is required. This is because the cutting force is 2 as a natural result.
This is because it must be doubled. Moreover, the tools used for this are very expensive, so that this method is only of interest for mass production. Furthermore, when using only one tool, the cutting table is arranged so that it can be moved back and forth at right angles to the direction of feed of the web material, thus making possible a zigzag arrangement with the feed of the web material, so that the pieces are cut in the direction of feed of the web material and at right angles thereto. They are punched out in two rows that are different from each other in different directions, and the eyes are separated from each other (
Schuler, Hamb, p. 283) is also known.

The above method is particularly used when punching out pieces of round or similar shape.

However, with such a cutting device, it is impossible to cut out, for example, a small triangular slope while avoiding interference. For such purposes, multiple cutting tools are also required in the presses described above, or after the strip of material has passed through the press it must be rotated by 1800 degrees and fed through the tool again. Another known cutting machine (DT-Tower 1532089) is equipped with a cutting table that can reciprocate at right angles to the direction of feed of the strip material, and the cutting table can be used for multiple cutting. As is known in the art, there are two cutting devices attached to each row, of which only one of the cutting devices can be moved at any time to the top of the strip of material in its end position. There is.

The above embodiment also requires two tools, and the nuclear embodiment has a negative impact on the economics of the press using it due to the high cost of the tools.

Furthermore, additional space is required for the range of motion of the tool at the bottom of the cutting stage. The object of the invention is to more simply solve the problems discussed with cutting devices as described above.

According to the present invention, the rotation axis of the tool can be displaced within a plane into which a strip or band-shaped material such as a band-shaped tin plate is fed by a positioning device attached to the tool or tool carrier. Proposed. Advantageously, the positioning device described above is formed by two ribs and is attached to two pivot points on the tool or tool carrier by means of connecting bolts.

Furthermore, the connecting bolt of one of the two pestles mentioned above is
An important feature is that the tool or even the tool, together with its pivot point on the carrier, is guided forcibly relative to a stationary part of the press, for example a press stand.

In this case, the forced guidance can be formed as a longitudinal slit or can be configured in accordance with the respective desired stroke, movement and/or movement of the tool.
Alternatively, it may be formed in various shapes depending on the rotational movement, such as a straight long hole or a curved slit. However, according to the present invention, the village that is connected to the forcibly guided pivot point is arranged on a fixed press rock part, such as a press table, and is perpendicular to the direction in which the strip material is fed. It is also possible to be guided by an additional guiding device located there. In this case, the additional guide devices can be rearranged in a replaceable manner, so that the seating arrangement layer can be replaced with a different guide device if necessary, such as in the form of a stamped bevel or strip of material. Another characteristic feature according to the invention is that the pivot points of the two punches are arranged on two sliding rings, each of which is provided on the tool or on the tool carrier; It is guided through a long hole provided between two pin points and fixed in the hole.

The sliding ring is displaced by means of an adjusting screw which is known per se. The drive for operating the positioning device is preferably arranged outside the range of the tool and the press stand and is preferably a drive with two cranks with central shaft drive. In this case, it is advantageous for the crank pin of the two-crank drive to be arranged in such a way that it can be displaced and fixed in a guide groove provided in the crank arm. For example, an adjustment screw known per se is arranged for displacing the crankshaft. Furthermore, the at least one crank arm is designed as a double-armed crank to enable translational movement of the tool if required. Without departing from the spirit of the invention, it is also possible to use any other drive mechanism as the drive device, such as a cylinder with two piston rods filled with pressure.

In order to remove the metal plate from the tool, for example, a removal and transfer device known per se is arranged.

It is also possible to connect to the cutting device according to the invention a station known per se for adjusting the position of the metal plate, for example a rotating cradle. In this regard, various different embodiments are known, and it is possible to adopt one that corresponds to the shape of the metal slope in each case. An important feature of the invention is that metal plates of different shapes can be punched out with maximum efficiency of the material and with only one tool, transversely cutting the metal strip of material. This means that there is no need to move the tool horizontally or to move the tool horizontally.

Furthermore, significant space savings are achieved below the cutting stage.
The positioning of the tool according to the invention necessarily generates only a few inertia forces due to the few pivoting strokes that can be carried out at the same time, so that the actual driving force can be designed to be weak.

Furthermore, the tool carrier can be of simple construction. This is because the tool attachment portion can be moved and adjusted arbitrarily according to the needs of each case. The device according to the invention can furthermore work with conventional zigzag cutting methods and rotary cutting methods.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be explained in more detail in the following with reference to the accompanying drawings, which schematically show parts of two exemplary embodiments. The cutting device according to the invention shown in FIGS. 1 and 2 has a metal 4 single-sided receiving box 2 fixed to a press table, the box having sliding edges 6 on its top surface.
It carries 1. A tool is displaceably mounted on the sliding edge 61. The entire tool, as already mentioned above, consists essentially of a lower part 1 of the tool accommodating a female mold holder 8 and a female mold 7, which lower part is provided with a guide hole in which a bushing 9 is fitted; A guide column 10 is movably guided through the guide hole, and further comprises a holding plate 11 to which the guide column 10 and a male die 14 are fixed. The holding plate 11 is fastened to the cutting punch 24 by means of a holding angle 62 in a manner and in a manner not shown in detail in the attached figures.

The iron holding angle holds the holding plate 11 and carries out the holding plate 11 when the cutting village 24 is raised or lowered, but also allows the entire tool to be pivoted relative to the cutting punch.
At the height 17 of the material feed plane, a strip of tin plate 16 is fed step by step through the tool, and is held down by a hold-down ring 19 during each cutting process.

The hold-down ring 19 is accommodated in the hold-down device 18, with a rubber spring 20 being provided between the hold-down device and the holding plate 11 for punching. There is a pull-out groove 2a inside the box 2 for receiving a small metal piece.The small metal piece 15 punched through this is pulled out from the inside of the tool into a small piece holder by a Kosaka transferor 63 that matches the shape and size of the small piece 15. 64.

Although the driving of the Kosaka transition element 63 will not be explained in detail, the stroke of the transition element changes each time depending on the position of the small plate 15 that has been pushed out and has not yet moved into the pull-out groove 2a. configured to obtain. Furthermore, take-out transfer device 4
1 is placed, the conveyor grasps the metal piece 15 in the position where it was pushed down by the jaws 47, 48, and then guides it onto the rotating pedestal 43.

On the rotating pedestal, the metal piece 15 is rotated into the required position, and then guided to the tool of the next connected press. The arrow 44 indicates the direction of rotation of the rotating presentation table 43, in which the piece 15 must be rotated in order to obtain the same position required for processing in the next connected press. It is the direction. In order to control the tool in the required position during punching, two punches 67 and 68 are pivotally connected to the lower part 1 of the tool by means of connecting bolts 65 and 66.

Connecting bolts 65 and 66 are connected to sliding rings 69 and 70
The sliding ring is displaceable by adjusting screws 73 and 74 in elongated holes 71 and 72 arranged in the lower part of the tool. The long hole 71 above
, 72, the longitudinal direction of which coincides with the joining line of the pivot points 75 and 76. Furthermore, the connecting bolt 65 is supported by a block 77 that is iron-fitted with the slit, and is guided through the slit 78 of the metal piece receiving box 2.

The other end of the above villages 67 and 68 is connected to the crank pin 79
and 80' are connected to crank arms 81 and 82 of a drive device using two cranks. Also in this crank case, crank arms 81 and 8
Sliding rings 85 and 86 are provided which can be displaced in guide grooves 81a and 82a provided in 2 by means of adjusting screws 83 and 84 and fixed in the grooves, with which the crank Arms 81 and 82
radius is adjusted. The crank arms 81 and 82 are driven via drive pinions 87 and 88, intermediate gears 89 and 90 and a common drive gear 91. A drive lever 93 driven by a cam is attached to the shaft 92 of the drive gear 91. The cam itself is not shown. The movement of the cam causes a rotation of the drive gear 91 during one step of the cutting village 24, and a reverse rotation as indicated by the arrow 94 during the next step. The above rotation amount is such that the crank arms 81 and 82 are rotated by 180 degrees.
is selected so that it rotates only by a certain amount.

The structure of the cutting device shown in FIG. 3 is exactly the same as that of the previously described embodiment. This diamond cutter is designed to cut the metal piece 4/piece 15 using a zigzag cutting method. At this time, since the shape of the metal piece 15 is different, naturally the male shape 14 and the frame 47 of the take-out and transfer device 41 must also be deformed to fit it. Now, in this embodiment, since the small metal piece 15 is always pushed down in the same posture, there is no need for the next connected rotating pedestal 43 to rotate.

The functional aspects of the cutting device shown in FIGS. 1 and 2 will now be described. It is therefore possible to punch out metal plates 15 of different shapes with a zigzag cutting method without rotating the tool, or alternatively with a rotating tool cutting method. When using a method of cutting by rotating the tool, adjust the adjustment screws 73 and 74 to rotate the entire tool into the metal 4.
By displacing the tool in the lateral direction relative to the one-piece cradle 2, the tool can be rotated by any angle within the range from oo to 90o.

At this time, the rotation amount by which the male mold 14 moves is related to the position of the rotating shaft 45, and the position is determined by adjusting the strokes of the two punches 67, 68. In this embodiment, the stroke of the punch is given by the effective radius of crank arms 81 and 82, and these radii are adjustable by adjusting screws 83 and 84. The actual position of the rotation axis 45 of the tool can be moved arbitrarily by a combination of the radius lengths of the crank arms 81 and 82 and the courses of the crank pins 79 and 80. For example, crank arm 81
and 82 radius, crank pins 79 and 80 are 1
If they are misplaced by 80 degrees and are chosen to be of equal length, the rotation axis 4 located in the center of the male mold 14
A rotation of the tool around 5 occurs. crank arm 81
By changing the radius of the crank arm 82 to zero and setting the radius of the crank arm 82 to a value within an adjustable range, the rotating shaft 45 can be moved to
Put it in position 5. If the radius of the crank arm 81 is increased opposite the axis of rotation to a value equal to the radius of the crank arm 82, the tool will move in parallel as its axis of rotation 45 moves to infinity.

This condition is represented in FIG. 3 and is utilized in the zigzag cutting method. Pivot point 7 as already mentioned above
Due to the 5 and 76 possible displacements, the cutting device according to the invention has the possibility of obtaining an infinite number of different rotation angles and displacements that can be set independently of one another.

To facilitate adjustment, adjustment screws 83 and 84 and 73 and 74 are provided with suitable graduations. It is possible to make structural changes other than those described above without departing from the spirit of the invention.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a cutting device according to the present invention, and FIG.
FIG. 3 is a cross-sectional view taken along line E-F in the figure, and is another plan view of the cutting mount shown in FIG. 1, showing a state in which the relative positions of the crank pin and the arm have been changed. In the figure, 16... band-shaped tin plate, 17...
...Material feeding surface, 45...Tool rotation axis, 6
5,66...Connection bolt, 67,68...Mura, 69,70...Slip ring, 71,72...
...Long hole, 73,74...Adjustment screw, 75,7
6... Pivot point, 78... Slit, 79, 80
...Crank pin, 81, 82 ...Crank arm, 8
1a, 82a...Guide groove, 83, 84...
Adjustment screw, 85, 86...Sliding ring, 87,
88... Small gear, 89, 90... Intermediate gear, 91... Driving gear, 92... Axis of the driving gear. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. A punching tool installed in a press is rotatably supported around a rotational axis perpendicular to the material supply plane, which shaft is furthermore supported by a positioning device attached to the tool or to the tool carrier. A small metal plate from a strip or strip of material, such as a tin plate or the like, which is fed intermittently through a tool, such that it can be displaced arbitrarily within the plane in which the strip or strip of material is fed. In the tool positioning device of a press machine for punching, the positioning device is
Two rods 67, 68 are pivoted to two pivot points 75, 76 of the tool or tool carrier by means of connecting bolts 65, 66, the connecting bolt 65 of one rod 67 being Together with the pivot point 75 of the tool or tool carrier, it is forcibly guided with respect to a stationary press member, such as a press stand;
or formed by a curved slit; 2.
Two coupling bolts 6 arranged at two pivot points 75, 76
5, 66 are supported by two sliding rings 69, 70, which are fitted into slots (
71, 72 and can be fixed in elongated holes, these elongated holes being arranged in the direction of the straight line connecting the two pivot points 75, 76, and the two sliding rings 69, 7
0 can be moved through the elongated holes 71, 72 by adjusting screws 73, 74, and the other ends of the rods 67 and 68 are arranged specifically outside the range of the tool and the press table. It is connected to crank pins 79 and 80 of crank arms 81 and 82 of a drive device using two cranks driven by a central shaft, and the crank pins are inserted into guide grooves 81a and 82a provided in the crank arms by adjusting screws 8.
3 and 84 and fixed in the grooves, and that the effective radius of the crank arm is adjusted by these sliding rings, at least A tool positioning device for a press machine, characterized in that one crank arm 81 is formed as a double-arm crank.