JPH029526A - Scrap cutting device - Google Patents

Abstract

PURPOSE:To quickly grasp throughput by installing a detecting means which detects the amount being pushed out by one cycle of pushing out operation with a material pusher and a detecting means which detects the amount of movement of a presser slide. CONSTITUTION:Before the commencement of works, specific gravity rho is set in advance by a specific gravity setter. Scrap materials A are compressed to a cut width W in a feeding box 4, and the tips of materials A are compressed by a presser slide 6 in an up-and-down direction. Next, the push-out board 26 of a material pusher 5 advances to push out a required amount of materials A ahead of a bottom plate 3, and then the board 26 retreats slightly. The distance of the advance and retreat of the board 26 are then detected, and the pushed out amount (cut length S) is calculated by a controlling device. Next, the slide 6 is lowered to compress materials A, and the amount of movement of the slide 6 is detected and the height h of materials A is calculated by the controlling device. Then, the materials A are cut. The controlling device calculates the weight of cut materials from the height h, cut length S, specific gravity rho and cut width W.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field 111) This invention relates to a cutting device for compressing and cutting scrap.

[Conventional technology]

After the scrap is compressed, it is cut into appropriate lengths and processed. The structure of such a scrap cutting device will be explained using FIGS. 1 and 2. An upper cutting blade 2 that can be raised and lowered and a lower cutting blade 3 that is fixed are provided facing each other on a frame 1. The frame 1 is connected with a feeding box 4 into which scrap material is fed, and a material pusher 5 which pushes out the scrap material in the box 4 between the upper blade 2 and the lower blade 3. A presser slide 6 is provided at the rear of the extrusion direction to press the scrap material downward.

In the above scrap cutting device, the scrap material is compressed in the width direction by the feeding box 4, the compressed material is pushed forward by the material pusher 5, the scrap material is compressed vertically by the presser slide 6, and then Cut between the blade 2 and the lower blade 3.

[Problem to be solved by the invention]

By the way, in the process of cutting scrap, the throughput of the process is determined based on the weight of the cut scrap.

In this case, the throughput of the entire scrap processing factory, which is equipped with many cutting devices, compression devices, etc., can be almost accurately calculated using a truck scale installed in the factory. On the other hand, there is no effective way to measure the throughput of each cutting device. There is.

However, there is a problem that the judgment based on the intuition of the operator has large variations and lacks reliability.

On the other hand, with the method based on the number of cut pieces, etc., the size of the compressed pieces obtained by compressing scrap changes depending on the density inside the scrap, so accurate values cannot be obtained. Even if the amount of feed per cycle is the same, the height when pressed up and down with the presser slide changes due to the difference in the density inside the scrap, and the size of the scrap lump to be cut changes.

Further, the specific gravity of the scrap mass after compression may also change depending on the type of content in the scrap. For this reason, the size of the cut scrap lumps varies with each cutting cycle, and when the yield is calculated based on the number of scrap lumps, there is a problem that the processed weight cannot be obtained accurately.

As described above, if the throughput of each cutting device cannot be accurately grasped, there will be variations in the amount of work for each device, which will cause a decrease in the operating rate.

Therefore, it is an object of the present invention to provide a cutting device that measures the size of the scrap lump to be cut at the same time as cutting, and allows the throughput to be quickly determined.

[Means to solve the problem]

In order to solve the above-mentioned problems, the present invention provides a feeding box for feeding scrap materials into a frame that is provided with a vertically movable upper cutting blade and a fixed lower cutting blade facing each other, and a feeding box in which the scrap materials in the box are placed. A pusher for extruding material is connected between the upper blade and the lower blade, and the frame is provided with a presser slide that presses the scrap material downward at the rear of the upper blade in the extrusion direction, and the scrap material compressed by the presser slide is In a scrap cutting device that extrudes a material with a pusher and cuts the material between an upper blade and a lower blade, a detection means detects the amount of extrusion for each I cycle of the extrusion operation of the material pusher, and a detection means detects the amount of movement of the presser slide. This means that a means has been established.

[Effect]

The weight of the scrap lump to be cut is as shown in Figure 4, where W is the cutting width of the scrap, h is the height of the compressed scrap material, S is the cutting length of the scrap, and ρ is the specific gravity of the scrap. It is obtained by wXhXSXρ.

In this case, the scrap height h and the scrap cutting length S are variables that change, and the height h can be obtained by subtracting it from the strokes of the upper and lower blades if the movement amount of the presser slide is known, and the cutting length The width S is equal to the extrusion amount per cycle of the material extrusion means, the cutting width W is constant depending on the specifications of the device, and the specific gravity ρ is determined by the internal content of the scrap, so it cannot be set in advance. can.

Therefore, by calculating the height h and cutting length S of the scrap material from the amount of material extrusion obtained from the detection means and the amount of movement of the presser slide, and multiplying these by W and ρ, the material can be cut every cycle. The weight of the scrap mass can be calculated.

In addition, since the amount of movement of the presser slide indicates the contact position between the compressed scrap material and the upper blade, it is fed back to the upper blade drive unit, and the upper blade is rapidly moved until just before the contact position. If the cutting feed is then started, the cutting I cycle time can be shortened and work efficiency can be improved.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 to 3, the scrap cutting device of the embodiment includes a portal frame 1 constituting the shear body, a feeding box 4 connected to the rear of the frame 1, and a feeding box 4 connected to the rear of the frame 1. It consists of a material pusher 5.

A cutting slide 8 having an upper cutting blade 2 fixed to its lower end and a material presser slide 6 are attached to the open lower portion of the frame 1 so as to be movable up and down. The cutting slide 8 is attached to the frame 1
The cutting slide 8 is driven by one or more hydraulic cylinders 9 attached to the upper frame 1a, and there are gibs 10 on both sides of the opening lower part for guiding the movement of the cutting slide 8.
is installed.

On the other hand, the presser slide 6 is operated by a hydraulic cylinder 11 attached to the rear of the cutting slide driving cylinder 8 of the upper frame 1a.
Driven by. Further, as shown in FIGS. 5 and 6, a roller chain 12 equipped with a positioning stopper is attached to the presser slide 6, and the roller chain 12 is attached to a support frame 13 on the upper frame 1a. A rotary encoder 17 is attached to a rotating shaft 15 of the chain wheel 14 via a coupling 16.

This rotary encoder 17, as shown in FIG.
It is connected to the vIall device 18 that controls each cutting function of the cutting device, and when the presser slide 6 moves up and down, it is rotated by the roller chain 12 and chain wheel 14, detects the amount of movement of the presser slide 6, and converts it with electricity. The signal is sent to the controller 18 as a signal.

At the lower part of the open lower part of the frame 1, there is provided a support stand IS located below the presser slide 6;
A lower shearing blade 3 is attached to the upper front side of the shearing blade 9 . This lower blade 3 is formed linearly in the width direction, and the cutting slide 8
When the blade lowers, it comes into sliding contact with the end face of the upper blade 2.

As shown in FIG. 1, the upper blade 2 has a cutting edge shape that is inclined vertically in the width direction, and due to this inclination,
A required shear angle, the so-called shear angle, is obtained between the lower blade 3 and the lower blade 3.

As shown in FIG. 3, the feeding box 4 includes a slide #H and a press plate 210 that moves in the width direction on one side of a material feeding slide plate 21 having a side wall 20 on the opposite side.
2, the upper part serves as an opening for introducing scrap materials, and a pusher 112 is provided at the upper part of the side wall 2o to close the opening.
3 is rotatably attached.

The press plate 22 is attached to a support arm 24 rotatably attached to the side of the slide plate 21, and a plurality of drive cylinders 25 for driving the press plate 22 are provided on the side of the feeding box 4. It is being The above pressing plate 22
As shown by the chain line in FIG. 3, the movement stroke of is set so that when it is moved to the maximum, only the cutting width W, that is, the same length as the hem of the lower blade 3, remains on the temporary slide 21. The scrap material t1 put into the feeding box 4 is compressed by the pressing plate 22 between it and the side wall 20, and is compressed to the cutting width.

As shown in FIG. 7, the material busher 5 connected to the rear of the feeding box 4 has an extrusion plate 26 having the same width as the cutting width, and moves the extrusion plate 26 in the length direction of the material slide Fi21. It consists of a drive cylinder 27. This material pusher 5 pushes the scrap material compressed in the feeding box 4 forward by a predetermined amount for each cycle of cutting, and after all the scrap material has been pushed out from between the upper blade 2 and the lower blade 3, It is controlled so that it returns to the rear end position.

A rail 35 is provided at the lower part of the drive cylinder 27 along the cylinder 27, and a slide cover 36 is movably mounted on the rail 35. A chain 28 is stretched between the slide cover 36 and the push-out plate 26, and when the push-out plate 26 moves, the slide cover 36 moves together.

A chain wheel 29 is attached to the middle of the chain 28, and as shown in FIG. 8, a low reencoder 31 is attached to the rotating shaft 30 of the chain wheel 2S via a coupling. This rotary encoder 31, like the rotary encoder 17 connected to the presser slide 6, is connected to the controller 18, and when the push-out plate 26 moves, its linear motion is converted into rotational motion by the chain 28 and chain wheel 2. is changed, the rotary encoder 31 rotates, and the amount of movement is detected,
It is sent to the controller 18 as an electrical signal.

A specific gravity setting device 32 and a printer 33 are connected to the controller 18, and the specific gravity setting device 32 can input specific gravity in digital quantities. The value of this specific gravity is determined by the type 11 and shape of the contents contained in the scrap material.

Further, the controller 18 is equipped with a memory section and an arithmetic circuit that performs multiplication, division, addition, and subtraction, and calculates the numerical values input as electrical signals from both rotary encoders 17.31 and the specific gravity setting device 32 for each cycle of cutting by - This value is then stored in the memory section, and then multiplied by the cutting width W (mechanical specifications determined by the length of the lower blade 3) preset inside the memory section.
The integrated value is output on a display provided on the surface of the board of the controller 18 or on a printer 33. Further, the calculated values are added and stored in order, and can be output as the total amount of volume for the day.

The cutting device of this embodiment has the structure described above, and its operation will be explained next.

First, before starting work, the specific gravity is set in advance using the specific gravity setting device 32.

9 to 14 show the cutting process by the cutting device, and FIG. 9 shows the initial state of cutting. In this state, the scrap material A is compressed to the cutting width by the press plate 22 inside the feeding box 4, and the front end of the scrap material A is compressed vertically by the presser slide 6.

Next, as shown in FIG.
Then, as shown in FIG. 11, the push-out plate 26 is moved back by a slight amount.

At this time, the forward and backward distances of the material pusher 5 are detected by the rotary encoder 31, and the detection signals are sent to the controller 1.
8, the controller 18 calculates the forward and backward amounts to calculate the actual extrusion amount of the material pusher 5 (this is the cutting length S), and stores the numerical value in the memory section. In addition,
The amount of retraction of the material pusher 5 is appropriately set using a digital switch provided in the controller 18 or the like.

Next, as shown in FIG. 12, the presser slide 6 is lowered, and the receiver presses and compresses the scrap material A between it and the stand 19. Pressure on the hold down slide 6 is continued throughout the next cutting process to immobilize the movement of the scrap material.

In the above case, the distance moved by the presser foot slide 6 is detected by the row encoder 17, and the detected amount is sent to the controller 1B as an electric signal. The controller 18 subtracts the amount of manual movement and the cutting stroke of the upper blade 2 to obtain scrap material A.
The height h after compression is calculated and stored.

Then, as shown in FIG. 13, the upper blade 2 descends and cuts the scrap material between it and the lower blade 3. After the cutting is finished,
The upper blade 2 and the presser slide 6 are raised, returning to the initial state shown in FIG. 14, and the same operation as described above is repeated.

During the cutting cycle, the controller 18 calculates the weight of the cut scrap lump by multiplying the stored height h and cutting length S by the preset specific gravity ρ and cutting width W.

This calculated numerical value is stored, and the numerical value is added every cycle according to a command to the controller 18. When one charge of scrap material into the feeding box 4 is completed, the charged value is The numerical value is displayed on the display or printer 33. Further, the weight 41 corresponding to this I charge is further added, and when one day's worth of work is completed, the weight of the scrap lump processed in that one day can be displayed on the printer 33.

In addition, in the above embodiment, in the feeding box,
This shows a cutting device with a structure equipped with a pressure plate that compresses the scrap material to the cutting width, but it can also be used with a guillotine shear, etc., which directly pushes out the scrap material fed into the feeding box with a material pusher, presses it with a presser slide, and cuts it. Similarly to the above, the present invention can also be applied.

〔Effect of the invention〕

As explained above, this invention detects the cutting height and cutting length of scrap material at the same time as the cutting cycle, and calculates the weight of the scrap lump to be cut. Therefore, the amount of scrap processed can be accurately calculated. In addition, it is possible to understand the work output while operating the equipment.

Therefore, by using this cutting device, it is possible to increase the operating rate by adjusting the dispersion in the throughput between each cutting device according to the production plan, and to replace consumable parts by understanding the accurate throughput. Since the timing can be determined appropriately, stable maintenance and safe operation of the equipment can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a front view of a scrap cutting device according to the present invention;
Figure 2 is a partial longitudinal side view of the same as above, and Figure 3 is the I-
1-line cross-sectional view, Figure 4 (a) (bl is a diagram showing the same cutting structure as above, Figure 5 is a side view showing the detection part of the presser foot slide, Figure 6 is a cross-sectional view showing the main part of the detection part) A top view, FIG. 7 is a side view showing the movement amount detection section of the material pusher, and FIG.
9 to 14 are cross-sectional views of the main parts of the figure, and are diagrams showing the cutting process. 1... Frame, 2... Upper cutting blade, 3... Lower cutting blade, 4... Feeding box, 5...
・Material pusher, 6... Presser slide, 17
...Rotary encoder, 18...Controller, 22...Press plate, 25...
・Drive cylinder, 26... Extrusion plate, 27.
...Drive cylinder, 31...Rotary encoder, A...
scrap material.

Claims (1)

[Claims] (1) A feeding box into which scrap materials are fed into a frame equipped with a vertically movable upper cutting blade and a fixed lower cutting blade facing each other, and a feeding box in which the scrap material in the box is placed between the upper blade and the lower blade. A pusher for extruding the material is connected to the frame, and the frame is provided with a presser slide that presses the scrap material downward at the rear of the upper blade in the extrusion direction, and the pusher pushes out the scrap material compressed by the presser slide, and A scrap cutting device that cuts between a blade and a lower blade is provided with a detection means for detecting the amount of extrusion for each cycle of the extrusion operation of the material pusher and a detection means for detecting the amount of movement of the presser slide. Characteristic scrap cutting equipment.