JP2850288B2 - Wire straightening ruler cutting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for straightening a wire having a curl into a straight line, and for cutting the wire into a fixed length one after another.

[0002]

BACKGROUND OF THE INVENTION Making a large number of wires of a certain length, continuously drawing out the wire wound in a coil or drum, fix the curl through wire矯<br/> Masaki, total length cut Cut through the machine at a fixed length . The ruler cutting machine cuts when the tip of the wire hits a stopper at a fixed position.

[0003]

Total length cutting machine [0008] is when the wire becomes less than 3mm of steel, or curved by its own weight, it or buckling when exposed to tip the stopper, also lengthy amenities as long And other problems. The invention
Is a possible to automate, and waste the total length stopper total length cutting machine, the feed length of the wire feeding rolls at that location reaching the required value, it is an object to cut in exactly traveling.

[0004]

According to the present invention, there is provided a wire straightening / measuring device for cutting a set wire by centrally controlling a wire feed roll, a wire straightening machine, a cutting machine while running, and a drive motor of the above three members. It has a centralized control device that instructs the rotation speed and start / stop timing according to the thickness, running speed, and cutting length, and the running cutting machine has a groove formed by a cam roller at the tip of a driving lever that rotates in a vertical plane. while horizontally moving the tool rest with the cam, which has so Oshikiru the wire when the cam roller is around the bottom of the circular path, the central control device,
When the feed length of the wire feed rolls have reached the cutting length set to a value obtained by subtracting the length of the circular path of the cam roller activates the drive motor for driving the drive lever of the running in the cutting machine, through the driving lever to gradually increase the rotation speed of the Kamuro <br/> La, after allowed to reach the wire speed at the bottom of the circular path, returning by decreasing tOP, characterized in that the be stopped And

[0005]

In the wire straightening rule cutting device according to the present invention, the gauge is exclusively determined by the rotation angle of the wire feed roll. Although this part is a well-known technique, it is difficult to cut at the position at the moment when the gauge value reaches the required length of the wire. The wire rod travels at high speed and must be cut off while traveling without reducing the speed. When the stopped cutting machine is running in line with the wire speed and the machine is cut during running, the cutting position must be exactly the required length of the wire.

In the running cutter of the present invention, only the tool rest is movable along the wire, and the tool rest has a groove cam. Running
When the drive unit of the in- line cutting machine vertically turns the drive lever,
The cam roller at the tip of the drive lever makes one round from the top of the circular orbit. As a result, the tool rest with the grooved cam retreats, advances, and then retreats to the center. When the cam roller goes around the bottom of the circular orbit, the tool post moves at the highest speed, and then the tool post is cut.
The upper blade is pressed by a cam roller to perform a cutting operation.

[0007] speed of the centralized control apparatus, when the cam rollers on standby at the top of the circular path is around the circular trajectory starts with driving lever travel during cutting machine, reaching the bottom, wire of the present invention to be collected by a constant speed, and controls the driving dynamic motor running in the cutting machine. Thus the cam roller is gradually increased turning speed against the tool rest of the inertia and frictional resistance, the wire and a constant velocity is when cutting the wire in a circular orbit bottom, Ru is returned to the subsequent gradual decrease to top.

[0008]

FIG. 1 is a front view of an embodiment of the present invention. C at the right end is a carrier stand for rewinding and sending out the wire coil, and W is the wire. Three sets of wire feed rolls 1 are arranged on the traveling line L, and a wire straightening machine 2 is installed between them. The traveling cutting machine 3 is located at the left end of the traveling line L. A drive motor M3 of the driving motor M1 and the running in switching <br/> cross machine 3 of the wire feed rolls 1 at AC servomotor, the drive motor M2 of wire矯<br/> Masaki 2 is using an inverter motor. Wire rod 1, wire straightening machine 2, running cutting machine 3
Are known structures, and detailed description is omitted.
A tool rest 3a which is a movable part of the cutting machine 3 during running, a groove cam 6 thereof, a drive lever 4 swung by a drive motor M3,
The cam roller 5 at the tip, the guide rail 7 of the tool rest 3a which moves horizontally by the rotation of the cam roller 5, the cam roller 5
Indicates the cutting upper blade 8 or the like which is pushed down when it turns to the lowermost end.

According to the present invention, in order to straighten and cut a relatively small-diameter wire at the highest speed, the setting and detection of the cutting length are no longer performed by manual work and mechanical processing as in the prior art. In order to perform all non-contact processing, a numerical controller called a “motion controller” having a high-speed arithmetic function and a PLC (programmable logic controller) was adopted. As a result, the processing contents are executed on software by a program using the NC language and a program using the PLC language. FIG. 2 is a block diagram showing an outline of control of the centralized control device of the present invention.

In FIG . 2, reference numeral 10 denotes the above-mentioned "motion controller", which is named a centralized control device. Since the thickness, running speed, and cutting length of the wire are given to this, start and stop and rotation of the driving motor M1 for the feed roll, the driving motor M2 for the straightening machine, and the driving motor M3 for the cutting machine are performed. Indicate speed. As described above, the drive motors M1 and M3 are servo motors, and the drive motor M2 is an inverter motor. The other device of "PLC of other device" is an attached facility.

[0011] Figure 3 is a diagram action, showing the drive lever 4 mainly driving motor M3 for driving in the cutting machine 3 is pivoted with a circular orbit 9 of cam rollers 5 at the tip. The cam roller 5 normally stands by at a position directly above the circular orbit 9. Drive motor M
The feed length is measured by the rotation angle of the wire feed roller 1 driven by the feed rod 1. When the feed length reaches a value obtained by subtracting the length of the circular orbit 9 from the required cutting length set in the central control device 10 , the drive motor M3 is started. Then, the drive lever 4 starts turning, and the cam roller 5 starts running on the circular orbit 9 .

[0012] As can be seen better in Figure 1, since the cam roller 5 is fitted in a vertical cam groove 6 of the tool rests 3a, the cam roller 5 to pivot by a horizontal movement of the tool rests 3a along the guide rail 7 Become. Therefore, in order for the cam roller 5 shown in FIG. 3 to orbit the circular orbit 9, it is necessary to overcome the inertia of the stationary tool rest 3a, the frictional resistance with the guide rail 7, and the frictional resistance between the driving parts. When the cam roller 5 comes to the lowermost position of the circular orbit 9, the tool rest 3a must run at the same speed as the traveling speed of the wire W , and at the same time, the cutting upper blade 8 must be pushed down to perform cutting during traveling.

[0013] is carried out by the driving force of all these operations is the driving motor M 3. Therefore, how to control the driving motor M3, which is an AC servomotor, how the above-described operation is performed depends on the characteristics of the cutting machine 3 during traveling , particularly, uncertain frictional resistance. There is no choice but to decide. The experiment is an experiment in which the cam roller 5 shown in FIG. 3 controls the turning speed from the point A at the standby position to the circular orbit 9 to reach the lowest point B and return to the point A again as shown in FIG. .

FIG . 4 is a diagram in which the horizontal axis represents time, and the vertical axis represents the turning speed of the cam roller 5. While waiting at the point A in FIG. 3, the speed is 0, and time elapses on the horizontal axis. The point at which the drive motor M3 starts is denoted by A on the horizontal axis in FIG.
From there, the rotation of the cam roller 5 starts, and the speed is gradually increased to overcome friction and the like. Start cam roller 5 in FIG. 3 at point A, a little before the time of reaching the lowermost point B, a constant wire speed v of the point A or <br/> we increasing the speed of FIG. 4 is indicated by a one-dot chain line
Ing to the door constant velocity. Since the average speed of the cam roller 5 in FIG. 3 from the point A to the point B is １ ／ of the wire running speed v, the feed length of the wire feed roll 1 is changed from the cut length to the circular orbit after the previous cutting. When the cam roller 5 is activated when the value obtained by subtracting the length of the entire circumference 9 is reached, when the cam roller 5 comes to the lowest position, the wire cutting position is right below the cutting upper blade 8. .

When the cam roller 5 shown in FIG . 3 reaches the lowest point B, the gradually increased speed reaches the maximum value of the wire running speed v in FIG. 4, and the speed is maintained for a short time. In the meantime, traveling cutting is performed. Then, since the cam roller 5 gradually stops at the speed to the standby position and stops, the slope becomes a downward slope in FIG. 4 and reaches the point A on the horizontal axis. The experimental goal is to control the speed of the cam roller 5 and, consequently, the drive speed of the drive motor M3 so as to draw the trapezoidal diagram of FIG. This experiment only needs to be performed once for the cutting machine 3 during the same traveling, and there is no effect even if the target wire W changes.

[0016]

Since the wire straightening meter long cutting apparatus according to the present invention belongs to a wide small quantity production system, the time and effort Ru manually adjusted pollock total length of the total length cutting device prior to each time the wire in question is changed Was big. According to the present invention, it is sufficient to simply change the set values of the thickness of the wire, the traveling speed, and the cutting length of the central control device. In particular, the ruler cutting section of the present invention works without difficulty, no matter how thin the wire is, because the gauge is measured by the rotation angle of the wire feed roll, and centrally controls the combination of the tool rest with groove cam and the cam roller of the cutting machine during running. It was operated by the device so that it was possible to cut while traveling accurately at the position where the cutting length was reached .

[Brief description of the drawings]

FIG. 1 is a conceptual elevational view of one embodiment of the present invention.

FIG. 2 is an explanatory block diagram of the apparatus of FIG. 1;

FIG. 3 is an operation explanatory view of the running cutting machine of FIG. 1;

4 is a speed showing a change in the turning speed of the cam roller 5 in FIG. 3;
- it is a time diagram.

[Explanation of symbols]

Reference Signs List 1 wire feed roll 2 wire straightening machine 3 running cutting machine 3a tool post 4 drive lever 5 cam roller 6 groove cam 7 guide rail 8 cutting upper blade 9 circular orbit 10 centralized control device W wire M1 drive motor M2 drive motor M3 drive motor

Claims (1)

(57) [Claims] 1. A wire feed roll, a wire straightening machine, a cutting machine during running, and a drive motor of the above three members are centrally controlled, and each of them is set according to a set wire thickness, running speed, and cutting length. comprising a centralized control unit for instructing the start and stop timing and the rotation speed, the running of the cutting machine, while the horizontal movement of the tool rest grooved cam by the cam roller of the driving lever tip to pivot in a vertical plane, the cam roller is circular track When turning around the bottom of the wire rod, the centralized control device is
When the feed length of the wire feed roll reaches the value obtained by subtracting the length of the circular orbit of the cam roller from the set cutting length,
It activates the drive motor for driving the drive lever of the running in the cutting machine, through the driving lever to gradually increase the rotation speed of the cam roller, after allowed to reach the wire speed at the bottom of the circular path, and is gradually decreased A wire straightening ruler cutting device characterized by returning to the top and stopping.