JPH0144267Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a right angle shearing machine in which the upper and lower blades are bent at right angles along the X-axis and Y-axis directions.

Conventional technology As shown in Fig. 7, the upper and lower blades BU,
Each of the BLs is bent at right angles along the X-axis and Y-axis (referring to any two axes that are perpendicular to each other in a horizontal plane, and are the same in this specification), and
The upper and lower blades BU and BL are located within a box-shaped machine frame 1, and a plate material insertion slit notch 2 is formed horizontally across three adjacent sides of the box-shaped machine frame 1.
There are right angle shearing machines supported in either two consecutive lateral positions.

The upper blade BU is movable up and down, and the shearing blade part has a uniform inclination (rake angle) α with respect to the horizontal direction from one end of the blade to the other end via the intermediate bending part. After inserting the plate W into the slit notch 2 as shown in FIG. 8 (transverse plan view at the slit notch position in FIG. 7), if the upper blade BU is driven downward, A shearing action is sequentially applied to the surface of the plate material W in accordance with the direction of the above-mentioned inclination (proceeding from the X axis to the Y axis in FIGS. 7 and 8), and a desired rectangular blank material is cut off. upper and lower blades
The cutting action of BU and BL is a shearing action, unlike the scissoring action of soft sheets, etc.
The terminal ends of blades BU and BL (that is, the innermost ends of blades BU and BL in the Y-axis direction in Figures 7 and 8)
In BUa and BLa, a series of cutting processes must always be completed.

That is, for example, as shown in FIG. 9, when the upper blade BU is moved downward with the plate material W inserted beyond the terminal ends BUa and BLa of the blades BU and BL, the shearing action will continue along the cutting line a until the terminal ends of the blades.
As shown in Fig. 1, the cutting line a is extended well to the end of the blade, but when the upper and lower blades BU and BL overlap each other, the bottom surface of the upper blade BU
By BUb, the plate material immediately behind the lower blade BL
Wr is compressed downward, and the plate material W at the end of the cutting line a is illegally torn.

Therefore, the terminal BUa of blade BU, BL,
BLa (Figs. 7 to 9) does not substantially exert an effective shearing action, and the terminal end BUa of the blade,
As shown in Figures 7 and 8, BLa is usually made to have approximately the same depth as the terminal end 2a of the slit notch 2, and is applied to the machine frame 1 as a reaction force when the upper blade BU moves downward (during shearing action). In order to minimize the deformation stress (arrows A and B in Figure 7), the depth of the slit notch 2 should be set at the blade end BUa,
It is desirable to set it shallower than BLa.

Problems to be Solved by the Invention However, with the above-mentioned normal shearing machine, there are cases where the workpiece is a small-area workpiece W (Fig. 8), or the shearing work is carried out while moving the small workpiece W in the X-axis direction. There is no problem in some cases, but if the plate material is blade BU,
If the large plate material W has a large area exceeding the blade length of the BL and shearing work is performed while moving the large plate material W in the Y-axis direction, the following inconvenience will occur.

That is, the shearing operation performed while moving the large plate material W in the Y-axis direction means, for example, as shown in FIG. This is a process of inserting the slit deeper into the slit notch 2 in the depth direction and shearing it a second time along the cutting line c shown by the two-dot chain line.
In such work, the lower blade BL, which is improperly compressed by the bottom surface BUb of the upper blade mentioned above, must be
Although the plate material portion Wr directly behind has already been cut off as blank material 3 by the first shearing action, and the risk of the end of the cutting line c being illegally torn has been eliminated, the front edge of the plate material W
Wf collides with the terminal end 2a of the slit notch 2, and the plate material W cannot be further inserted in the Y-axis direction, resulting in the inconvenience that the second shearing action cannot be performed (FIG. 8). .

Means to Solve the Problem Therefore, this idea was developed to intentionally extend the end of the slit notch in the side machine frame on which the upper and lower blades are supported in the depth direction in the right angle shearing machine mentioned above. It is proposed that the period be extended to .

Example Examples will be explained with reference to FIGS. 1 to 6.

That is, Figures 1, 2, and 3 are a left side view, front view, and right side view showing the outer shape of the right angle shearing machine, respectively, and Figure 4 is a plan view with a part of the top plate cut away to show the internal structure. , Fig. 5 is a plan view in which a part of the top plate is cut out and drive mechanisms such as cylinders and links are omitted to clearly show the arrangement of the blades.
The figure is a schematic perspective view showing the upper and lower blades BU, BL, and the support mechanism and drive mechanism of the upper blade BU.

The box-shaped machine frame 4 of this embodiment has a substantially rectangular parallelepiped shape, and has horizontal slits 5 extending across three sides: the left side, the front side, and the right side. 5
a and 5b are notches 5 on the left side and right side respectively
The notch 5 on the right side is formed wide vertically so that a conveyor (not shown) for discharging cut blanks can enter therein, and the notch 5 on the left side is near the end of the notch 5a. Board material W
A touch switch 6 is provided to detect the approach of the vehicle to the terminal end and prevent a collision.

Reference numerals 7 and 8 denote cover plates that are attached above the slit notches 2 on the front and left sides via hinges 9 and 11, respectively, so that they can be opened and closed. When the cover plates 7 and 8 are opened, the side surface of the upper blade BU is opened. The upper blade BU is exposed and can be easily maintained.

12 is a table plate that extends below the notch 2, across the front and left sides, but when actually operating this right angle shearing machine,
It is used by assembling a plate material moving table 13 device having a plate material mounting surface at the same height as the table plate 12 (Fig. 1), and the plate material W is moved in the X and Y axis directions on the plate material moving table 13. It is adapted to be moved while being held by a work holder 14. 15 is a free ball on the table 13.

Reference numerals 16 and 17 are rectangular and circular reinforcing plates fixedly welded to the sides of the machine frame, respectively, and both serve to reduce the stress during shearing (arrows A and B in Figure 1) applied to the machine frame 4. In particular, the reinforcing plate 17 is designed so that its circular center coincides with the terminal end 5a of the notch to maximize the stress reducing effect.

The support mechanism and drive mechanism of the upper blade BU will be explained below.

That is, the lower blade BL is bolted to the left side and lower front side of the notch 5 as shown in the first, second and third figures, but the upper blade BU is fixed to the corners of both ends by the guide mechanism 21, which will be described later. The columnar guide post portion 22 is fixed to a ram 23 which is vertically movably supported and has a substantially right triangular shape in plan view, and is supported vertically movably with respect to the machine frame 4 (FIGS. 5 and 6).

The upper blade BU is provided with a uniform inclination (rake angle) α (rising from right to left in Fig. 6) with respect to the horizontal direction from one end of the blade to the other end via the intermediate bending part. The slope causes a shearing effect.

In this embodiment, the guide mechanism 21 that clamps and guides the guide post portions 22 at both ends of the ram 23 is as follows:
Almost the same as that shown in Special Publication No. 57-7850,
Two pressing cylinders 24 and 2 act to press each guide post portion 22 in the X and Y axis directions.
5, and a pair of wedge bodies 26, 27, 2, respectively, which receive and support the movement of the guide post section 22 due to the pressing force of the pressing cylinders 24, 25.
8, 29. Therefore, the guide post portion 22 is always supported by the pressing cylinders 24, 25 and the wedge bodies 26, 27, 28, 29 surrounding it on all sides (fifth,
Figure 6).

Further, the taper directions of the outer wedge bodies 26, 28 and the inner wedge bodies 27, 29 are reversed vertically, and the outer wedge bodies 26, 28 can be vertically inserted and removed using a clearance adjustment device (not shown). By doing this, the inner wedge body 2
The guide post portion 22, which is constantly pressed by the pressure cylinders 24 and 25, moves in parallel along the X and Y axis directions of the guide post portions 7 and 29. The ram 23 is moved in parallel along the axial direction, and the entire ram 23 is moved in parallel in the X and Y axis directions to adjust the clearance between the blades.

Next, explaining the drive mechanism, the drive mechanism of this embodiment includes three brackets 31 protruding from the ram 23, and a
The rotation shafts 34 and 35 are interlocked and connected via the link 32 and the crank plate 33, and the rotation shaft 3
It consists of 4 and 35 hydraulic cylinders 36 for driving.

37 is a link plate that interlocks and connects the rotating shaft 34 and the rotating shaft 35. When the hydraulic cylinder 36 expands and contracts, the link 32 moves up and down by the rotating shafts 34, 35 and the crank plate 33, and the ram 23 moves up and down. It's starting to move. 4a is a vertical wall part for supporting one end of the rotating shaft 35, which is installed in the machine frame 4;
b is a wall portion to which the cylinders 36 are connected.

Further, the hydraulic cylinder 36 of this embodiment is constructed by connecting two cylinders 36a and 36b that extend and contract independently back to back to form a cylinder that substantially extends and contracts in two stages and has two long and short strokes. When only one cylinder 36a is extended and the ram 23 moves downward by approximately half a stroke, the blade portion of the upper blade BU extending along the X axis meshes with the lower blade BL. Board material W
When the cylinders 36a and 36b extend and the ram 23 moves downward over the entire stroke, the upper blade BU and lower blade BL engage over the entire blade length, and the plate material W
It is designed to exert a series of shear actions represented by L-shaped shear lines perpendicular to the .

Then, the end BUa on the left side of the machine frame of the upper blade BU and the lower blade BL that are guided and driven so as to be movable up and down as described above,
With respect to BLa, the notch end 5a is formed to extend particularly to the following position.

That is, as shown in the first and fifth figures, the notch end 5a extends beyond the upper and lower blade ends BUa and BLa,
A deep cut is formed to a position extending a certain length in the depth direction (Y-axis direction), and the Y-axis direction cut depth D (the length from the front of the machine frame to the notch end 5a) is determined by the plate material moving table. 13, even when the plate material W with the maximum area is inserted to the deepest position by the work holder 14, the depth at which the front edge Wf does not come into contact with the notch end 5a, that is, the Y of the plate material W with the maximum area. The axial width Wy or the maximum movement distance My of the work holder 14 in the Y-axis direction on the moving table 13 (however, My is almost equal to Wy, and My
≧Wy) plus some allowance (Figure 5).

Since the right angle shearing machine of this embodiment is constructed as described above, it can be freely moved along the X and Y axes using a known moving mechanism (for example, Japanese Patent Application Laid-open No. 46-7944) schematically shown in FIGS. 1 and 5. If the work holder 14, which has now been used for a long time, grips the plate material W and performs the shearing action for the entire stroke while intermittently moving it in the Y-axis direction, the front end side Wf of the plate material W will be aligned with the machine frame 4.
The first movement is not hindered by interference from
Rectangular blank materials 3, 38 that are adjacent and continuous in the Y-axis direction (that is, the straight line portions of cutting lines b and c along the Y-axis are substantially continuous in a straight line) as shown in Fig. It can be cut out.

That is, to explain the above operation in detail, first, by moving the work holder 14 together with the plate material W, the first cutting line b (dotted chain line) on the surface of the plate material is aligned with the positions of the upper and lower blades BU, BL, and then the 1 by extending the cylinder 36 to its full stroke.
The blank material 3 is cut out along the second cutting line b, and then the upper blade BU is raised and the work holder 14 is moved a predetermined length in the Y-axis direction (at this time, the work holder 14 is placed at the deepest position). ) Align the second cutting line c (two-dot chain line) with the positions of the upper and lower blades BU and BL, and also extend the full stroke of the cylinder 36 to move along the second cutting line c. The blank material 38 is cut out, but there is a possibility that the upper blade BU will be improperly crushed by the second downward movement of the Y.
Since the plate material portion Wr immediately behind the lower blade BL along the axis has already been cut off as the blank material 3 by the first shearing action (Fig. 10), during the second downward movement of the upper blade BU However, there was no problem such as the end of the cut being torn, and since the end 5a of the slit notch was set to the depth described above (greater than the maximum movement distance My of the work holder 14), the second cut The cutting line c can be set to a position where the straight portion cx along the X axis is closest to the proximal end of the plate material W on the work holder 14 side. In other words, even if the width Wy of the plate material W in the Y-axis direction is larger than the length of the upper and lower blades BU and BL along the Y-axis, the adjacent rectangular blank material 3 as shown in FIG. 38, and the entire width of the plate material W along the Y axis can be effectively utilized.

Furthermore, by performing a shearing action while intermittently moving the plate material W along the X-axis direction, it is of course possible to cut out continuous rectangular blanks adjacent to each other in the X-axis direction, thereby making the plate material Even if the length Wx of W in the X-axis direction is larger than the length of the upper and lower blades BU and BL along the X-axis, the entire length of the plate material W along the X-axis can be used effectively. In a shearing machine, the vertical movement of the upper blade BU can only move by a half stroke, so if you first cut only in the Cutting line d (one-dot chain line) e (two-dot chain line)
(The connecting point g between the straight cutting line d and the L-shaped cutting line e is substantially included on one continuous cutting line d and e), and the blank material 39 is long in the X-axis direction. It is also possible to extract it as

Note that the length and width of the plate material W as the material are set in accordance with the standard, so there is no problem when performing the above shearing work using the plate material W that conforms to the standard, but if the dimensions are outside the standard, there will be no problem. If the width Wy of the plate W in the Y-axis direction is excessive, when the plate W is inserted and moved to the back in the Y-axis direction by the work holder 14, the front edge Wf of the plate There is a risk of accidental collision with the notch end 5a of the plate material W, but even in such a case, in the above embodiment, the touch switch 6
If the closest approach to a is detected, the work holder 14
Since the known drive system (not shown) is immediately stopped, deformation of the plate material W and damage to the work holder 14 etc. due to collision of the plate material with the machine frame 4 can be prevented.

Further, instead of attaching the reinforcing plates 16 and 17, the stress on the machine frame 4 may be reduced by increasing the wall thickness of the machine frame 4 itself.

Effects of the invention As is clear from the above explanation, the right angle shearing machine according to this invention does not suffer from the disadvantages mentioned at the beginning, and even when working with large-area plates,
Blank materials that are adjacent and continuous in either direction of the Y-axis can be cut out, allowing for more freedom in the layout of the blanks.
In addition, even if the end of the workpiece is about to collide with the end of the slit notch, the touch switch will detect the approach of the workpiece and stop the movement of the work holder, preventing the workpiece from colliding with the machine frame. You can prevent accidents such as bending or damage to the machine frame.

Furthermore, since the slit notch is made as narrow as possible to allow the plate material to be inserted, the stress that deforms the machine frame can be kept to a minimum even if it is extended in the depth direction.

[Brief explanation of the drawing]

Figures 1 to 3 show the external appearance of the right angle shearing machine, with Figure 1 being a left side view and Figure 2 being a front view.
Figure 3 is a right side view, Figure 4 is a plan view with a portion of the top plate cut away to show the internal structure, and Figure 5 is a top view with a portion of the top plate cut away, with drive mechanisms such as cylinders and links omitted. A plan view clearly showing the arrangement of the blades.
Figure 6 is a schematic perspective view showing the upper and lower blades and the support mechanism and drive mechanism for the upper blade. Figure 7 is a perspective view of a conventional right angle shearing machine. Figure 8 is also a slit cutout. 9 is an explanatory diagram showing the shearing action at the end of the blade, and FIG. 10 is a plan view showing the cutting order when cutting continuous blank material in the Y-axis direction from a plate material. For example, FIG. 11 is an example of board cutting showing the cutting order when cutting out a blank material elongated in the X-axis direction. 4...Box-shaped machine frame, 5...Slit notch, 5a
... Termination, 6 ... Touch switch, 14 ... Work holder, BU ... Upper blade, BL ... Lower blade, BUa, BLa ... End, W ... Plate material.

Claims (1)

[Scope of utility model registration request] Each of the upper and lower blades is bent along the X-axis and Y-axis directions, and the upper and lower blades are formed within a box-shaped machine frame and across three adjacent sides of the box-shaped machine frame. The slit notch for inserting the plate material is supported on the inside of two consecutive sides, and the slit notch on the side where the upper and lower blades are located is formed into an elongated slit notch that is slightly wider than the plate material into which it is inserted. At the same time, the terminal end of the slit notch extends in the depth direction beyond the ends of the upper and lower blades, and a touch switch for detecting the plate material is provided at the terminal end of the extended slit cutout, and the touch switch 1. A right angle shearing machine, which is connected to a drive system of a work holder for moving plate material, and is configured such that the work holder for moving plate material stops when it approaches the end of a slit notch in the plate material.