JPS6360038A - Operation of hot forging device - Google Patents

Abstract

PURPOSE:To enable the operation having no breakdown of a heater with the efficiency of full capacity all the time by finding the difference in the retreating limit reaching time of a movable shearing blade and the material moving start time and the difference in the advance start time of a clamper and a material stopping time on each forging timing. CONSTITUTION:A proximity sensor 60 is provided at the retreat limit of the reciprocating stroke of a clamper 53 and a proximity sensor 61 is provided at the retreat limit of a mobile blade 52 as well. The advance starting time t4 from the retreat limit of the clamper 53 is detected by the proximity sensor 60 and the retreat limit reaching time t1 of the mobile blade 52 by the sensor 61 respectively. The moving start time t2 of the material and its moving stoppage time t3 are detected by the pulse generator 74 composing the control means linked with the motor 31 of the exclusive driving source provided on a material feeder 3. From the detection result of the four times t1, t2, t3, t4 a transmission is performed to a comparator 62 and displayer 64 and the respective difference is displayed on the displayer 64.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention uses coiled glands and rods as materials, unwinds and straightens them in the same line, heats them, and then intermittently and continuously processes them into products such as bolts. This is a method for operating a hot fabrication machine for forging and forming, in particular, a special drive r! h
The present invention relates to a method of operating a hot forging apparatus in which a material feeder is driven and controlled by a synchronous operation command signal obtained by extracting the forging timing of a forging machine as an electric signal.

[Conventional technology] Coil-shaped glands and rods are used as materials, which are unwound, straightened and heated in the same line, and then continuously forged intermittently into products such as bolts. Bending straightening machine, material feeder, heater, and scattering machine are installed in sequence i1! A well-known hot image iri device is one disclosed in Japanese Patent Application Laid-Open No. 58-38632.

However, this known hot forging apparatus has many disadvantages because the material feeder and the forging machine are simply mechanically connected.

For this reason, the Kaku+ is specially designed for the material feeder! ! Provide an I7 source,
By electrically connecting this material feeder and the forging machine, the above-mentioned simple a! Netsuma T! solves the inconveniences of mechanical connection! Regarding the i-manufacturing device, the present applicant previously filed a joint application with another applicant (Japanese Patent Application No. 38903/1983).

In the previously filed technology, a material feeder equipped with a dedicated drive source is driven in synchronization with the forging timing of a forging machine by a control means shown in FIG.

That is, the control means in FIG. 3 is for the case where the dedicated drive source is an electric motor, and includes a supply amount setting device (70) for inputting and setting the feed amount of material required for one forging, and A calculator (71) for calculating the feed speed, a motor operation control section (72), a motor power supply section (73), and a pulse generator (31) connected to a dedicated motor (31) provided in the material feeder. 74) and! A steel piece (75a) and a proximity switch (75b) formed at an angle corresponding to the period during which material can be fed are attached to the May 7 shaft of 8I Zoki.
and a forging machine rotational neck detector (75), and the rotational position detector (75) detects the motor (31).
), and by determining the material feed speed using the B calculator (71) for the position command, the material feeder is made to feed a predetermined length of material during the material feedable period of the forging machine. This is what I did.

Problems to be Solved by the Invention However, when the material feeder is provided with a dedicated drive source and the material feeder is operated only by being electrically connected to the forging machine by the control means configured as described above, the following problems occur. There was a problem like this.

In other words, the period during which material can be fed by the material feeder in this type of hot forging equipment is limited to a specific position where the clamper and movable shearing blade that constitute the material cutting mechanism provided inside the forging machine do not block the material feed movement. must be completed while at the retraction limit of the reciprocating stroke.

Therefore, the synchronous operation 1 command signal by the control means described above is also issued while the clamper and the movable blade are at the retraction limit of their operating strokes.

However, during actual operation, due to various factors such as response delay of the control means, the situation as shown in FIGS. 4 and 5 may occur, for example.

FIGS. 4 and 5 show the synchronous operation command signal transmitted by the rotational position detector (75), the movement of the material, and the material shear inside the forging machine when the operation is performed only by electrical connection by the control means. This is an example of a special sample of the relationship between the movement of the movable blade and the material grasping clamper, with time on the horizontal axis and position on the vertical axis.

In addition, Fig. 4 shows the condition where the number of material feeds is 120 times per minute and the material feed length per time is 35 sn, and Fig. 5 shows the condition where the number of material feeds is 190 times per minute and the material feed length per time is 30 sn. This is when the operation was carried out under the following conditions.

FIG. 4 shows the time point t when the material feed movement starts! There is no margin between the time t when the movable shearing blade reaches the retract limit that allows material movement, and it is necessary to take measures to delay the material feed movement start time t8. After moving forward from the retraction limit position that allows movement and stopping material movement, material #
[The time point t when the clumber starts moving straight from the retraction limit to grasp []
There is a considerable margin between 4 and 4, which increases the number of material feeds.
Fig. 5 shows the operating conditions that can be taken by the position h, and, contrary to the case of Fig. Although there is a margin, there is no margin between the time t when the material feed movement stops and the time t4 when the clamper starts moving straight from the retraction limit, indicating an operational state in which it is necessary to take measures to provide a margin or to reduce the number of times the material is fed. It is something.

However, it is completely unclear whether such an operating condition exists unless a special sampling is carried out when operating only with the previously applied control means, and if operation continues under the conditions shown in Figure 4 mentioned above, However, there is a problem that material movement starts before the retraction limit of the movable shearing blade is reached, which may cause breakage of the movable blade or damage to the heater, and that it is uneconomical to operate at a lower efficiency than the capacity. In addition, when operating under conditions shown in Fig. 5, it is economical to operate with a power cup, but there is a risk that the clumber may close during the movement of materials and cause damage to the heater. There's a problem.

Therefore, it has been desired to develop an operating method that allows continuous operation at peak efficiency and without the risk of heater breakage.

Means for Solving the Problems The present invention has been made in response to the above-mentioned needs, and each time the a-forming machine operates, it detects both the start and stop of material feed movements, which were not detected in the past, as well as the forging It detects four points: the time when the material shearing movable blade installed in the machine reaches its retraction limit, and the time when the material grasping clamper starts moving straight beyond the retraction limit, and calculates the difference between the material movement start point and the time when the movable blade reaches its retraction limit, as well as the material The gist of the operation is to calculate the difference between the point at which movement stops and the point at which the clumber starts moving straight.

Effect of the present invention! According to the 1i process method, the shearing movable blade is determined at each forging timing! The degree of margin can be instantly checked as an absolute value based on the difference between the time when the limit is reached and the time when the material movement starts, and the difference between the time when the clamper starts moving straight and the time when the material stops.
In addition, if there is room, appropriate measures such as efficiency improvement measures can be taken quickly.

Example Hereinafter, the present invention will be specifically explained with reference to the drawings.

Figure 1 is an overall view showing an example of a hot forging machine, where (A) is a plan view, (B) is a side view, and Figure 2 explains the material cutting mechanism installed inside the forging machine. It is a diagram.

In the figure, (1) is a coil unwinding machine that rewinds materials such as coiled soft wires and rods, ■ is a bend straightening machine that straightens the material that is being unwound and fed, and (3) is a coil unwinding machine that rewinds materials such as coiled soft wire and rods. A pinotirol-type material feeder is used for feeding, (4) is a heater consisting of an A-conductor heating coil, etc., and (2) is a forging machine.

The material feed am (3) is controlled by a motor (
3I), and is operated synchronously with the forging timing of the forging machine ■ by the control means having the configuration shown in FIG. Equipped with a working forging head, mold, etc., and material feed l! ! It also includes a material cutting mechanism that cuts the material M (see FIG. 2) that is fed in predetermined lengths by (3).

As shown in FIG. 2, the material cutting mechanism includes a fixed blade (51) fixedly installed and a movable blade (52) placed opposite to each other.
and a club/par (53) arranged opposite to the fixed blade (51).
), it consists of a movable blade (52) and a clamper (5).
3) is connected in the same way as the forging head to the main shaft connected to the motor that is the drive machine of the forging machine (2).

This clapper (53) and movable blade (52) are connected to a forging machine (
They operate at the timings described below during one rotation of the motor 9. In other words, the movable blade (52) is
While rotating, they move forward and backward, except for staying at the retractable limit position and the forward limit position for a certain period of time, respectively.

On the other hand, the clamper (53) moves forward from the retraction limit and reaches the forward limit at the end of the retraction limit of the movable blade (52), and at the beginning of the advance from the retraction limit of the movable blade (52) and when cutting the material. It remains at the forward limit until it is completed, and then the movable blade (5
During the forward movement step 2), it operates to retreat to the retraction limit.

In the hot forging HFIZ having the above configuration, the operating method of the present invention is carried out as follows.

That is, as shown in FIG.
A proximity sensor (old) is provided at the retreat limit of 2), in other words, at the retreat limit, and the proximity sensor (60) detects the time t4 when the club/par (53) starts moving straight from the retreat limit, and the movable blade The proximity sensor (
6I).

Further, the time point t when material movement starts and the time point t when movement stops are the above-mentioned control means (third
Detection is performed by a pulse generator (74) constituting the circuit (see figure).

Then, at each of these four time points jl+tt, t3.
From the detection result of j4, the arithmetic unit (62) determines the material movement start time t! and the time point t when the movable blade reaches its retraction limit, Δ
The comparator (63
) and the display (64), and the display (64) displays the respective differences ΔT, and ΔT. - way,
The comparator (63) is set in advance with the allowable upper and lower limits of ΔT1 and ΔT, which are manually input.
If one or both of T and T are outside the permissible upper and lower limits, an alarm is issued by a buzzer or a lamp to notify the operator of the abnormal operating state.

If an alarm is issued by this comparator (63), the operator can check ΔT and ΔT displayed on the display (64).

For example, if ΔT1 does not have enough margin as shown in FIG. 4, the rotation angle detector (75 ), or by attaching a time adjustment device to the position command calculator (71) and giving U extension time, the synchronous operation 1 command signal t is generated. (see Fig. 4), or in other words, the starting of the material feeder (3) is delayed. Take the 7th position. Further, if there is a large margin in ΔT as shown in FIG. 4 described above, measures are taken to increase efficiency by increasing the number of forgings, in other words, the number of revolutions per minute of the forging machine.

Furthermore, if the ΔT or ΔT value displayed on the display (64) is outside the allowable upper and lower limits, the operator may
If it is not possible to take adjustment measures such as setting the aircraft to a stop, 1. - Take a position.

Note that the detection of the time t4 when the clamper (53) starts moving straight and the time t1 when the movable blade (52) reaches its retreat limit is shown in FIG. 2 because these are connected to the main shaft of the forging machine β). A proximity sensor (60) is located at a position phased by a predetermined angle with respect to the proximity sensor (75b) of the rotation degree detector (75).
, (Gl) may be provided for detection.

Furthermore, the time points t1゜t, at which the movement of the material starts and stops, are not obtained from the pulse generator (74) connected to the motor (31) that is the drive source of the material feeder (3), but are obtained from the material, for example. The straightening roll shaft attached to the exit side of the coil unwinding machine (1), which has a long contact length and stops rotating by reliably following the stoppage of movement of the material, or the straightening roll in the front stage of the straightening machine ■ A pulse generator may be connected to the shaft for detection.

Furthermore, the present invention omit the bend straightening machine (2) and the material feeder (3) in the device configuration equipment, and provide both functions to the coil unwinding machine (1), or the material feeder Of course, the present invention can also be applied to a hot forging apparatus having a line configuration in which only (3) is omitted and the function is provided to the bend straightening machine (3).

Effects of the Invention According to the operating method of the present invention described in detail above, the retraction limit of the movable blade constituting the material cutting mechanism provided in the a-making machine that governs the period during which the material can be fed, which has not been detected in the past, is detected. The arrival point, the straight-line start point of the clamper, the actual movement start point and the movement stop point of the material are detected each time for forging timing, and the point in time when the retraction limit of the movable blade is reached and the point in time when the material starts moving is detected. Difference and Clumber's IIH
The difference between the time when the movement of the material starts and the time when the movement of the material stops is constantly monitored and confirmed, and if there is an abnormality, the position according to the situation can be quickly taken, so that the following effects can be obtained.

■ Able to always operate under the efficiency of the Nohka Cup.

■ Accidents such as heater damage can be reliably prevented.

■ Continuous operation for as long as possible is possible, and the operating rate can be improved.

[Brief explanation of the drawing]

Fig. 1 is an overall view showing an example of a hot forging apparatus to which the present invention is applied; Fig. 1 (a) is a plan view, Fig. 2 (b) is a side view, and Fig. 2 is a material cutting mechanism inside the forging machine. FIG. 3 is a diagram showing a control means for synchronizing a material feeder with a dedicated drive source to a forging machine, and FIGS. 4 and 5 are a diagram showing a conventional method. It is a figure showing an example of the actual operation state by a hot forging device. ■...Coil unwinding machine 2...Bending straightening machine 3.
...Material feeder number...Heating device 5...Forging machine GO, 0+...Proximity sensor 62...Arithmetic unit 63...Comparator 6t...Display figure 3

Claims (1)

[Claims] A material feeder having at least a heater and a dedicated drive source is provided in the front stage of the forging machine from the downstream side to the upstream side, and the material feeder is synchronously operated by extracting the forging timing of the forging machine as an electric signal. A method of operating a hot forging machine whose drive is controlled by a command signal, the method comprising: a time when a material shearing movable blade provided in the forging machine reaches a retraction limit; a time when a material grasping clamper starts moving straight from the retraction limit; and The starting point and stopping point of the material feed are detected, and the difference between the point in time when the movable blade reaches the retraction limit and the point in time when the material starts moving, and the difference between the point in time when the clamper starts moving beyond the retracting limit and the point in time when the movement of the material stops. A method of operating a hot forging device characterized by operating the hot forging device while determining the difference between the two.