JPS649125B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cutting device that automatically cuts a long material to a preset size, and particularly to a cutting device that eliminates weight errors after cutting and improves material yield. .

For example, in the forging industry, when manufacturing a product, a bar material formed into a long regular length is cut into required dimensions using a cutting device at a steelworks, and the cut material is then forged.

By the way, in recent years, when a long cut material is cut into a predetermined set length using a cutting device, emphasis is placed on the weight error accompanying the dimensional error rather than the individual dimensional error of the cut material, and it is important to minimize the weight error. ization is required. Dimensional errors that cause such weight errors are caused by the fact that the material to be cut has a fixed size at a steelworks, for example, 5.5 mm.
If the end material is manufactured in a length of 1.5 m, there will normally be an error of several tens of millimeters, so if the end material is individually cut using a cutting device, an error in the weight of the end material will occur as will be described later. That is, as shown in FIG. 1, a long workpiece 1 of dimension L is
When a cutting device having a cylindrical lower blade 2 and a flat upper blade 3 performs restraint cutting to the dimension l set by the sizing stopper 4, if the cutting is performed sequentially as b ₁ , b ₂ . . . bn, then It is the material bn adjacent to the terminal material e that causes the most weight error as a product. For example, if the length E of the terminal material e remains at an appropriate length (normally longer than the diameter of the material), then the adjacent material can be
The cutting blade surface of bn is normal and there is no weight error, but as shown in Figures 3 and 4, if the dimension E of the end material e is shorter than the material diameter, the cylindrical lower blade 2 is The cutting material 1 is insufficiently restrained, a flat load acts on the flat upper blade 3, and the cutting surface between the adjacent material bn and the end material e deteriorates, resulting in the adjacent material bn
will result in a weight error. At the same time, the end material e may deform and become clogged within the cylindrical lower blade 2, and in this case, as shown in FIG.
is pushed out and discharged, but there is a risk that the cylindrical lower blade 2 may be scratched and damaged. Furthermore, the length E of the terminal material e
In an extreme case, if is short, the terminal material e will be completely deformed as shown in Fig. 6, the cutting surface between the adjacent material bn and the terminal material e will be significantly deteriorated, and the adjacent material bn will have a weight error. In addition to damaging the corner of the cylindrical lower blade 2, the end material e gets clogged within the cylindrical lower blade 2, and the subsequent workpiece 5
If it is not sent, problems will occur.

Furthermore, as shown in Fig. 7, if the dimension E of the terminal material e is slightly shorter than the set dimension l, the adjacent material bn
The cut surface between the end material e and the end material e becomes normal, and the adjacent material
bn does not cause a weight error, but the subsequent workpiece 5
If the extruded end material e is discharged to the normal material side due to a mistake in the end material sorting device in the subsequent process, a weight error will result. Furthermore, if the terminal material e is slightly shorter than the set dimension l, the terminal material e may tilt and stay between the cylindrical lower blade 2 and the sizing stopper 4, as shown in FIG. 8, when it is discharged. . When the terminal material e is cut in this state,
If the lower cylindrical blade 2 and the upper flat blade 3 are damaged, problems such as this will occur. Furthermore, as shown in FIG. 9, the end material e stays between the sizing stopper 4 and the subsequent workpiece 5, and if cutting is performed in this state, the tip surface of the subsequent workpiece 5 will be scraped off. As a result, the upper flat blade 3 is damaged and the tip surface of the subsequent broken material 5 is deteriorated, which in turn causes a weight error.

In this way, the dimension of the length E of the terminal material e not only causes a weight error of the adjacent material bn and the terminal material e, but also causes secondary damage to the cylindrical lower blade 2, flat upper blade 3, etc. A problem arose.

Conventionally, in order to avoid such problems, the adjacent material bn and the terminal material e were discharged together without cutting the adjacent material bn. This discharge is performed by retracting the sizing stopper 4. According to this method, the yield rate was poor because the adjacent material bn, which could originally be used, was also disposed of as waste.

As another workaround, after cutting b _o+1 ,
If the sizing stopper 4 is tentatively retracted by an amount equivalent to about 1/2 of the set dimension l, and the uncut adjacent material bn and end material e fall during that time, they will be treated as scrap materials, and if they do not fall. There is a method of returning the sizing stopper 4 and cutting the adjacent material bn. In this case, waste of material can be reduced more than in the above method, but if the lengths of the adjacent material bn and the end material e match when the sizing stopper 4 is retracted, the material will not fit into the sizing stopper 4. Cylindrical lower blade 2
There is a problem in that the sizing stopper 4 does not return to its original position, and the sizing stopper 4 moves each time a piece of material is cut. There was also the problem that it took a long time to move the equipment, reducing work efficiency.

In view of the above-mentioned problems of the conventional cutting device, this invention has been developed to improve and eliminate these problems.It cuts without causing any weight error in the material to be cut, does not damage the cutting blade, etc., and improves the material yield. To provide an improved cutting device.

That is, the present invention includes a cutting section comprising a cylindrical lower blade and a flat upper blade, a sizing stopper disposed in front of the cylindrical lower blade for setting the cutting length of the material to be cut, and a tip end surface of the material to be cut. In the terminal material processing device that continuously cuts the material to be cut while the material is in contact with a fixed size stopper, a large number of blades are provided at a set position behind the cutting blade surface of the cylindrical lower blade and at the rear end position of the material to be cut. The light emitters and receivers are disposed facing each other with the workpiece sandwiched between them at equidistant positions in the axial direction of the workpiece between a dimension slightly longer than the maximum cutting length of the workpiece, so that the rear end surface of the workpiece is A plurality of detection means for detecting with light beams and a plurality of reference values are set in advance regarding the cutting of the terminal material and the adjacent material, and the remaining total length of the material to be cut is measured using the detection signal of the detection means. Calculate the dimensions of the end material by dividing the total length of the material to be cut by the cutting length of the material to be cut, and if the end material is larger than the maximum value or smaller than the minimum value of the reference values, cut the material. The cutting device is characterized in that it has an arithmetic control unit that issues a cutting command if the cut is within the range between the maximum value and the minimum value.

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

In FIG. 10, 10 is a cylindrical lower blade, and 11 is a flat upper blade, and the material 1 to be cut is restrained and cut by both of them. 1
Reference numeral 2 denotes a fixed-size stopper provided in front of the cylindrical lower blade 10, and is attached to the tip of an adjustment shaft 13 that is supported so as to be movable back and forth. The adjustment shaft 13 has a thread carved on its outer peripheral surface, and is rotated by a pulse motor 15 via a rotary gear mechanism 14, so that it can move back and forth by a predetermined amount depending on the rotation angle. Note that the rotary gear mechanism 14 is movable relative to the adjustment shaft 13 in the axial direction, and rotates integrally with the adjustment shaft 13 in the rotational direction. Further, the adjustment shaft 13 is provided with a disk 16a having a large number of slits formed around the periphery, and the number of the slits is counted by a pulse coder 16 or the like, thereby detecting the rotation angle of the adjustment shaft 13. . Reference numeral 17 denotes a detection means provided behind the tip surface of the cylindrical lower blade 10 by an appropriate distance.For example, mounting boards 18 and 19 are arranged above and below the material 1 to be cut, and the lower surface of one mounting board 18 is A plurality of receivers G ₁ , G ₂ . . . are arranged along the longitudinal direction.
...Gn is arranged at equal intervals with a slight interval α,
The light receivers G ₁ and G ₂ are mounted on the top surface of the other mounting board 19.
...... Phototubes K ₁ , K ₂ ... corresponding to Gn individually
…Kn is provided. Further, the dimension W between the rearmost phototube _K1 and the foremost phototube Kn of the detection means 17 is set to be slightly longer than the maximum cutting length set in the cutting device. The material to be cut 1 is the phototube K ₁ , K ₂ . . . Kn and the photoreceiver.
G ₁ , G ₂ ......passes between Gn, and the rear end is
The phototubes K 1 , K 2 stop inside the detection means 17, and the phototubes K ₁ , K ₂ ......
Either light of Kn corresponds to the light receiver G ₁ , G ₂
When the light is received at Gn, the position of the rear end surface of the material to be cut 1 is detected by the first phototube and the light receiver, and the remaining total length of the material to be cut 1 is measured based on this. That is, the dimension T from the tip surface of the cylindrical lower blade 10 to the rearmost phototube K _{1 and photoreceiver G 1 of the detection means 17 is set to a certain value, and the distance T from the tip of the cylindrical lower blade 10 to the phototube K 1} and photoreceiver G ₁ at the rearmost end of the detection means 17 is set to a certain value. For example K ₄ and G ₄
Then, by calculating T-3α, the dimension L' from the tip surface of the cylindrical lower blade 10 to the rear end surface of the material to be cut 1 is obtained, and the preset cutting length l is set to the dimension L'. By adding them, the total length L of the material to be cut 1 at that point in time is determined.

Reference numeral 20 denotes an arithmetic control section that performs predetermined arithmetic processing based on the measurement signal from the detection means 17 and controls the rotation of the pulse motor 15 as described later. This arithmetic control unit 20 divides the measured total length L of the material 1 to be cut by the set cutting dimension l, and calculates the dimension E of the end material e.
If this dimension E is within a certain range, the adjacent material bn and the terminal material e are cut, and if it is outside the range, the adjacent material bn and the terminal material e are not cut, and the pulse The motor 15 is operated to move the fixed size stopper 12 back by a predetermined amount to discharge the adjacent material bn and the end material e together. For example, the calculated terminal material e
As shown in Fig. 11, the dimension E of E ₁ to _{E 7} (E ₇ =
In the case of either of l), if we are now in the vicinity of E ₁ , cutting the adjacent material bn and the end material e will cause a weight error in the adjacent material bn, and the end material e will also be deformed. Because there is a risk of damaging the cylindrical lower blade 10, etc., the adjacent material bn is not cut, but the sizing stopper 12 is moved back by an appropriate amount P ₁ (P ₁ = E ₁ + β) and the adjacent material is removed.
bn and the terminal material e are discharged together. The same applies when E is shorter than ₁ . Also, the calculated dimensions of the terminal material e are
If it is near E ₆ , it is possible to cut the adjacent material bn, but there is a risk that the cylindrical lower blade 10 and the flat upper blade 11 will be damaged when discharging the terminal material e, so in this case as well, the adjacent material bn cannot be cut. The sizing stopper 12 is moved back by an appropriate amount P ₂ (P ₂ = E ₆ + β) without cutting the adjacent material.
bn and the terminal material e are discharged together. The same applies if it is longer than E ₆ . Note that E ₁ and E ₆ are set, for example, based on the material diameter dimension of the material to be cut 1, and β is set to a value larger than α and to a value that does not allow the terminal material e to accumulate. Further, if the calculated dimension of the terminal material e is within the range of E ₂ to _{E 5} , the sizing stopper 12 is not moved, the adjacent material bn is cut, and the terminal material e is discharged by the subsequent material to be cut.

The above-described cutting dimension l and the terminal material e when not cut
The calculated dimensions E ₁ , E _{6 ,} etc. are input into the calculation control unit 20 in advance. In addition, the cutting device does not continuously supply the material 1 to be cut, but feeds the material 1 intermittently one by one, and when the light receiver _G1 at the last part of the detection means 17 receives the light, the cutting device cuts the material with the cylindrical lower blade 10 and the flat upper blade 11 at one end. The operation is stopped, and when a subsequent workpiece (not shown) comes into contact with the rear end surface of the previous workpiece 1 and light reception by the detection means 17 becomes impossible, the cutting operation is performed again. put.

To explain the operation of the cutting device with the above configuration, first, the sizing stopper 12 is positioned so that the cutting length is l, and then the long workpiece 1 is moved from the rear to the cylindrical lower blade 10. The cutting tool is sequentially restrained and cut by the lower cylindrical blade 10 and the upper flat blade 11 while the tip is brought into contact with the sizing stopper 12. As the cutting progresses, the leading end surface of the material to be cut 1 comes into contact with the sizing stopper 12, and the rear end surface enters the detection means 17 and the phototube K ₁ ,
K ₂ ......Kn light corresponds to the receiver G ₁ , G ₂ ......
When light is received at Gn, the cutting operation is stopped based on this, the remaining total length L of the material to be cut 1 is determined, and the total length dimension L is transmitted to the calculation control section 20. The arithmetic control unit 20 divides the transmitted dimension L by the pre-given cutting dimension l, and compares the dimension E of the terminal material e with the pre-given values E ₄ and E ₆ , and if it is outside the range. Emit a non-cutting signal for adjacent material bn,
If it is within the range, a disconnection signal will be issued. Thereafter, the subsequent material to be cut is supplied, and when it comes into contact with the rear end surface of the previous material to be cut 1, the cutting operation is started again. When the cutting of the cutting material b _o-1 is completed, the operation is performed based on a signal from the calculation control section 20. That is, the signal from the calculation control unit 20 is not cut, and the fixed size stopper 1
When retracting 2 by P ₁ or P ₂ , flat blade 1
1 is stopped, the pulse motor 15 is operated, and the adjusting shaft 13 is moved by a predetermined amount via the rotary gear mechanism 14 to discharge the adjacent material bn and the terminal material e together. When the ejection is completed, the sizing stopper 12 is returned to its original position. Also, if the signal from the calculation control unit 20 is cut, the adjacent material bn is cut as is,
After that, the terminal material e is discharged. After discharging the terminal material e, cutting of the subsequent material to be cut 1 is newly started.

The above-mentioned operations are repeated in sequence to continuously cut the material 1 to be cut into predetermined dimensions l. In addition, defective terminal materials are sorted by a terminal material sorting device and are disposed of as waste.

As explained above, according to the present invention, during cutting, the rear end position of the material to be cut is detected by the detection means to measure the remaining total length of the material to be cut, and based on the measurement result, the arithmetic control section The dimensions of the end material that will be generated last are calculated, and it is automatically determined whether or not it is possible to cut between the end material and its adjacent material. If cutting is not possible, the sizing stopper is moved back and the adjacent material and end material are cut. When cutting is possible, the cutting is continued, and after cutting the adjacent material, the remaining end material is ejected, and the material to be cut is cut to the set size without any weight error. In addition, the end material that is cut and discharged after each cut can be reliably avoided and discharged together with the adjacent material, which may cause a weight error, and the material yield can be improved, as well as the quality of the cut material. There is no risk of damaging the cutting jig.

In addition, the detection means detects the end of the material to be cut by the presence or absence of visible light transmitted between the light emitter and receiver.
There is no detection error, and since a large number of light emitters and receivers are provided, even if the length of the material to be cut or the cutting length changes, it can be detected and cut without any problem. Furthermore, with the above cutting device, the need to move the sizing stopper backward to eject the end material is limited to specific cases, and the amount of movement is small, so it does not take much time to eject the end material, greatly improving work efficiency. improve.

[Brief explanation of the drawing]

Fig. 1 is a diagram explaining the operating principle of a conventional cutting device, Fig. 2 is a sectional view showing good cutting of the end part of the material to be cut, and Figs. 3 to 9 are diagrams illustrating the end part of the material to be cut. FIG. 10 is a cross-sectional view showing a defective cut; FIG. 10 is a drawing showing an embodiment of the cutting device according to the present invention;
The figure is a drawing showing the dimensional error of the end portion of the material to be cut. 10... Cylindrical lower blade, 11... Flat upper blade, 12...
Sizing stopper, 15... Pulse motor, 17...
Detection means, 20... Arithmetic control unit, 1... Material to be cut, bn... Adjacent material, e... Terminal material, K ₁ , K ₂ ...
...Kn...Phototube, G ₁ , G ₂ ......Gn...Photoreceiver.

Claims (1)

[Claims] 1. A cutting section consisting of a cylindrical lower blade and a flat upper blade, a sizing stopper arranged in front of the cylindrical lower blade and setting the cutting length of the material to be cut, and a sizing stopper that sets the cutting length of the material to be cut. In the terminal material processing device that continuously cuts the material to be cut while the material is in contact with are arranged facing each other with the workpiece sandwiched between them at equal intervals in the axial direction of the workpiece between a dimension slightly longer than the maximum cutting length of the workpiece, and the rear end surface of the workpiece is detected with a light beam. A plurality of detection means and a plurality of reference values are set in advance for cutting the end material and the adjacent material, and the remaining total length of the material to be cut is measured using the detection signal of the detection means, and the remaining length of the material to be cut is measured. The dimensions of the terminal material are calculated by dividing the total length by the cutting length of the material to be cut, and if the terminal material is larger than the maximum value or smaller than the minimum value of the reference values, no cutting is performed and the maximum value is calculated. and a calculation control unit that issues a cutting command if the value is within a range between and a minimum value.