JPS6324779B2 - - Google Patents

Description

[Detailed description of the invention] The present invention cuts a wire rod into a predetermined length using a wire cutting machine equipped with an automatic feeding device, and transfers the cut length material to an automatic processing system using an automatic transfer device. The present invention relates to a method and apparatus for synchronizing a wire cutting machine and a processing system in an automatic processing line that processes wire rods.

Conventionally, this type of automatic processing line has been able to be automated and has been implemented under the conditions that it constantly handles a fixed-length material and constantly performs a constant processing on the fixed-length material. It was customary to In this case, based on the constantly constant processing time necessary for a certain processing on the automatic processing equipment located at the end of the automatic processing line, the standard length materials are intermittently sent to the automatic processing equipment according to the processing time. The cutting time required to feed the wire to the wire cutting machine using an automatic feeding device for a fixed length and cut it can be made to match the processing time described above, and therefore the wire feed rate can also be maintained at a constant rate. I wish it were constant. This type of automatic processing line is preferable because it has extremely high productivity and can save manpower. However, on the other hand, it has a major drawback in that it only has the ability to produce single items. Therefore, for example, when there are many different lengths of standard-length materials, or there are multiple types of processing details that vary widely, the wire rod can be cut by feeding the length of the changed standard-length materials into the wire cutting machine. The cutting time required to complete the process will change unless you change the wire feed speed of the automatic feeder, and if the processing content changes, the processing time will also change, so the automatic processing line that only has the above-mentioned single-item production capacity can handle this. Can not. If you are forced to adapt, the cutting time required to cut out one piece of standard length material
In the relationship between T ₀ sec/1 piece and the machining time τ ₀ sec/1 piece required to process 1 piece of standard length material, when T ₀ < τ ₀ , processing is delayed and the intermediate stock of standard length material or wire rod is It is necessary to stop the cutting machine, and when T ₀ > τ ₀ , the automatic processing equipment needs to be stopped because cutting of the standard length material is delayed, and in either case, not only the production capacity of the automated line cannot be fully utilized, but also In order to achieve complete automation, it becomes necessary to add additional equipment. Of course, it would be better to have multiple automatic processing lines that are suitable for the processing time determined by the length and processing content of various types of standard-length materials, but in this case, it would be better to have multiple automatic processing lines that are suitable for the processing time determined by the length and processing content of various types of standard materials. This is not a problem if there is strong demand, but if there is not, production will be extremely low compared to the huge capital investment.
Investment efficiency deteriorates. In addition, in recent years, methods have been developed and implemented to add numerical control functions by introducing computers into the field of processing equipment.
Not only does this make the device complicated and extremely expensive, but it also takes a lot of time to input data, so it cannot be said to be common.

The present invention solves the above-mentioned drawbacks of the conventional automatic processing line for mass production of single items, and changes the standard length of the wire within a certain range without using a numerical control device that uses a complicated and expensive computer. This invention has been made to provide a method and device for synchronizing a wire cutting machine and a processing system that can configure an automatic processing line that can respond to changes in processing time that occur as a result of selecting multiple types of processing. It is something.

The gist of the present invention is to set the wire rod feeding speed to a wire rod cutting machine by an automatic feeding device so that it can be automatically switched between high and low speeds, and to set the wire rod feeding speed to a wire rod cutting machine by an automatic feeding device so as to be able to automatically switch between high and low speeds, and to set the wire rod feeding speed to a wire rod cutting machine between the wire rod cutting machine and the automatic processing system so that the wire rod feeding speed can be automatically switched between high and low speeds. As soon as the standard length material is placed on the cradle of the transfer device that transfers the standard length material to the automatic processing system, and as soon as the standard length material is being processed by the automatic processing system, it is simultaneously and constantly processed. If it is detected that the wire material is on the pedestal and being processed by the automatic processing system at the same time, the wire feed speed is automatically switched to a low speed, otherwise it is automatically switched to a high speed. , the time difference that exists between the cutting time required to feed and cut a wire rod to a predetermined length into a wire rod cutting machine and the processing time required to process a fixed length material with an automatic processing system,
The cutting time and the machining time are made to synchronize by gradually decreasing the length as the operating time progresses.

The present invention is applicable to thread rolling processing and button head processing, in which the length L of the standard length material is _L1 , _L2 ...Ln, and the processing performed on both ends of the standard length material using an automatic processing system requires different processing times. It is a combination of two types of forging processing, and therefore there are three processing modes: screw-button head shown as a in Fig. 1, screw-button head shown as screw b, and button head-button head shown as c, so the processing time for each is An example will be explained in which τa, τb, and τc are different from each other. FIG. 2 is a plan view illustrating the outline of the embodiment. 1 is wire cutting machine 2
This is an automatic feeding device that feeds the wire to the wire rod. The automatic feeding device 1 uses pinch rollers 11, 11 which are rotationally driven by a drive source M at a predetermined speed to feed a wire W wound around a payoff stand (not shown), for example.
is fed into the wire cutting machine 2 according to the arrow. The wire cutting machine 2 cuts the cutting blade 21 when the length of the wire W fed into the wire cutting machine 2, which is determined by the product of the predetermined rotation speed and rotation time of the pinch rollers 11, 11, reaches a predetermined length. The wire rod W can be cut between runs. (An explanation of the auxiliary equipment for achieving length accuracy is skipped.) The cut standard length material SW falls according to the thick arrow and is placed between the wire cutting machine 2 and the automatic processing system described later. It is placed on one end of the pedestal of the automatic transfer device 3 close to the wire cutting machine 2 . The automatic transfer device 3 is composed of, for example, a walking beam, and the pedestal 31 is a fixed beam thereof, and the place where the standard length material SW is dropped from the wire cutting machine 2 and placed is No. 1 of the fixed beam. It is set to be a lane. The movable beam (not shown) of the walking beam 3 is set to operate intermittently in synchronization with the completion of processing according to the processing time of the automatic processing system, which will be described later. By repeating intermittent operations, the loaded standard length material SW is sequentially moved to the No. 2 lane, No. 3 lane, ... No. n lane on the fixed beam, and sent to the other end, and the final operation is performed. Accordingly, the material is transferred to the automatic processing system shown as 4. Automatic processing system 4
For example, a processing equipment group consisting of two automatic thread rolling devices 41 and 41' and two automatic button head forming devices 42 and 42', which are arranged symmetrically on the left and right, and a processing device group according to the required processing mode. equipment movement rails 43 and 43 that enable the equipment used for the processing to be moved and placed at a predetermined processing position;
When the standard length material SW placed on the line connecting the left and right machining positions and transferred from the automatic transfer device 3 is displaced in the direction of arrow a←→b and displaced in the direction of a, This is a processing device that waits for the left end of the material SW in the figure on the left side, and when it is displaced in the b direction, the standard length material SW
It is composed of a group of feed rollers 44 that rotate in forward and reverse directions so that the right end in the figure can be processed by a processing device waiting on the right side. The automatic processing system 4 is provided with a discharge device (not shown) for discharging the processed standard length material SW. The drive source M of the automatic feeder 1 is set by a speed setting device 6 to rotate at a predetermined high speed or low speed. To change the rotation speed,
A detection mechanism, such as a limit switch LS, provided in a position close to the No. 1 lane of the receiving table 31, and a detection mechanism, such as an electric circuit Ec provided in the feed roller group 44, provided within the automatic processing system are used. The limit switch LS is set so that the feeler can come into contact with the standard length material SW on the No. 1 lane, and the electric circuit Ec is set to be closed when the standard length material SW is on the feed roller group 44. Therefore, while the standard length material SW is on the No. lane, a detection signal is sent from the limit switch LS.
If S ₁ =1 is not the case, a detection signal S ₁ =0 is output, and while the fixed length material SW is being placed on the feed roller group 44 and being processed, a detection signal is output from the electric circuit Ec. If S ₂ = 1, otherwise the detection signal S ₂
=0 will be output. The above respective detection signals S ₁ and S ₂ are sent to the AND element 5, and the corresponding detection signals S 1 and S 2 are sent to the AND element 5.
It is processed in the AND element 5 as S ₁ ×S ₂ =1 S ₁ ×S ₂ =0. The output _S3 of the AND element 5 is sent via the relay R to the connected speed setting device 6. The speed setting device 6 includes _{a high-speed circuit v1 that maintains the rotational speed of the drive source M at a predetermined high speed and a low-speed circuit v2 that} maintains the rotational speed of the drive source M at a low speed, and is activated in response to the output _S3 of the AND element 5. With the above relay R,
For example, in the case of the above output 1, the contact of the low speed circuit v ₂ is closed as a fall, while the contact of the high speed circuit v ₁ is opened as a release, and when there is no output S ₃ , the contact of the low speed circuit v ₂ is opened as a release. The contact point of the high-speed circuit _v1 is made to fall and remain closed, while the contact point of the high-speed circuit v1 is kept closed by falling. Note that 7 is a speed control device. Therefore, the automatic feeding device 1 controls the feeding speed of the wire W by the signal _S1 from the limit switch LS mentioned above and the signal _S2 from the electric circuit Ec. When it is detected that the standard length material SW is being processed without the material SW (S ₁ = 0) x (S ₂ = 1) = 0...v ₁ (high speed circuit) (2) No. 1 of the cradle 31 When it is detected that there is a standard size material SW in the lane and that the standard size material SW is being processed (S ₁ = 1) x (S ₂ = 1) = 1...v ₂ (low speed circuit) (3) cradle 31 When it is detected that there is a standard-length material SW in No. 1 lane and that the standard-length material SW processing is completed (S ₁ = 1) x (S ₂ = 0) = 0...v ₁ (high-speed circuit) circuit is automatically closed in each case, and the wire is cut while changing the speed to high speed feed v ₁ or low speed feed v ₂ according to the rotational speed of the drive source M, which is automatically switched by the speed control device. It is possible to send it to machine 2. The high speed v ₁ m/min and low speed v ₂ m/min of the wire rod feeding speed determined by the high speed v 1 and low speed v ₂ of the rotational speed of the drive source M set by the speed setting device ₆ are processed by the automatic processing line. It is specifically set in consideration of the longest to shortest length L of the standard length material SW and the longest to shortest machining time τ.

A case in which the automatic processing line having the above configuration is operated will be described below. At the start of the automatic processing line, there is no standard length material SW on the No. 1 line of the walking beam 31, which is the transfer device 3, so the signal of the limit switch LS is S ₁ = 0, and the signal of the automatic processing system 4 is also There is no standard length material SW, so there is no electric circuit.
Since the signal from Ec is also S ₂ =0, the speed setting device 6 of the drive source M is in a state where the high speed circuit v ₁ is closed. Therefore, the automatic feeder 1 has a high speed feed v ₁ m/min
The wire rod W is fed into the wire rod cutting machine 2, and the wire rod cutting machine 2 cuts the wire rod W using a cutting blade 21 that automatically operates when the fed wire rod W reaches a predetermined length L. Standard length material cut to length L
SW is No. of cradle 31 of walking beam 3.
Fall into lane 1. The movable beam of the walking beam moves the standard length material SW on the No. 1 lane to the No. 2 lane by jump feeding, and then moves the standard length material SW on the No. 1 lane to the No. 2 lane.
This operation is repeated intermittently every time the No. 1 lane of the SW arrives, and after n intermittent operations, the standard length material SW is transferred to the automatic processing system 4. During this time, the wire rod cutting machine 2 is intermittently repeating the operation of sequentially cutting the wire rod W, which is subsequently fed in at a high speed of v ₁ m/min, into standard length materials SW. The first cut length material SW and the following standard length material SW are
While it stays for a short time until it falls on No. 1 lane and moves to the next lane by the operation of walking beam 3, it maintains contact with the contact of the limit switch LS, so the limit switch LS intermittently
Detection signal of standard length material SW on No. 1 lane S ₁ = 1
is emitted. The signal S ₁ =1 is input to the AND element 5, but until the first standard length material SW is transferred to the automatic processing system 4, the signal S 1 =1 is input to the AND element 5.
Since the signal from S ₂ =0, the speed setting device 6
The circuit maintains high speed _V1 . first length material
By transferring the SW onto the feed roller group 44 in the automatic processing system 4, the roller group 44 is
The electric circuit Ec provided in is closed and emits a detection signal S ₂ =1. The signal S ₂ = 1 is a standard length material
The SW is displaced to the left and right on the roller group 44,
After the left and right ends are processed, they are output until they are discharged from the pinch roller group 44. On the other hand, due to the operation of the movable beam of walking beam 3, the No. 1 lane becomes an empty lane, so
The detection signal from the limit switch LS becomes S ₁ =0, so the wire W is fed at the same high speed v ₁ as before.
The standard length material SW is fed at a speed of m/min and cut by the wire cutting machine 2. The standard length material SW is the standard length material SW being processed by the automatic processing system.
Since the movable beam does not operate until the machining is completed, the limit switch LS remains on the No. 1 lane.
During this period, the limit switch LS outputs a detection signal S ₁ =1. Here, S ₁ =1 and S ₂ =1 are input to AND element 5, and output S ₃ is sent to relay R. Relay R is thereby activated, opening the terminal of high-speed circuit _v1 and simultaneously dropping the terminal of low-speed circuit _v2 , so that high-speed circuit _v1 is opened and low-speed circuit _v2 is closed. becomes. Therefore, the rotation of the drive source M is automatically switched from high speed rotation _v1 to low speed rotation _v2 . The pinch rollers 11, 11 of the automatic feed device 1, which are rotationally driven by the drive source M, change the feed speed of the wire W from high speed feed _v1 to low speed feed _v2 in accordance with the automatic switching of the rotational speed of the drive source M. , and this low speed feed v ₂ is maintained while the standard length material SW is being processed. When the machining of the standard length material SW is completed and it is discharged from the automatic machining system 4, the electric circuit Ec
is open, so the detection signal from the electric circuit Ec is S ₂ = 0, which is the input AND
In element 5, S ₁ ×S ₂ =0, so S ₃ output is stopped. When the input of the output _S3 disappears, the relay R can no longer keep the low speed circuit _v2 in the speed setting device 6 closed, and at the same time as releasing it, the high speed circuit _v1 is closed, and along with this, the drive source M is closed. Rotation speed also returns to high speed v ₁ , pinch roller 1 of automatic feeder 1
The feed speed of wire rods W No. 1 and 11 also returns to high speed feed _v1 . On the other hand, at this point, the walking beam 3 is set to work in conjunction with the automatic processing system 4.
is activated when the processed standard-length material SW is discharged from the automatic processing system 4 by the unillustrated discharge device, and the standard-length material SW that had been on the No. 1 lane until then is
Move the SW to the No. 2 lane, move the standard size material SW on the No. 2 lane to the No. 3 lane, and transfer the standard size material SW on the No. n lane to the automatic processing system. Therefore, as soon as the next process in the automatic processing system 4 begins, the No. 1 lane becomes an empty lane and is in the state of SW waiting for falling standard length materials. Therefore, the limit switch LS outputs a signal V ₁ =0,
As mentioned above, even if the processing signal S ₂ =1 is output from the automatic processing system 4, the AND element 5 does not output.
Therefore, the wire rod feeding speed is maintained at the high speed feed v ₁ , the wire rod W is fed into the wire rod cutting machine 2 at high speed and cut, and the cut standard length material SW falls and is replenished in the empty No. 1 lane. Ru. Each time the machining of the standard length material SW is completed, the above operation is repeated and automatic operation continues.

In the process of automatic operation described above, the feeding time t at high speed feed v ₁ m/min and the feeding time t at low speed feed v ₂ m/min required to feed the wire rod W of length L for a fixed length to the wire rod cutting machine and cut it. The time difference between the cutting time (t+T), which is the sum of the feeding time T at It becomes synchronized with τ. This will be explained with reference to an operation explanatory diagram shown in FIG. 3a, in which time (sec) is plotted on the horizontal axis and motion is plotted on the vertical axis. However, to avoid tedious explanations, the following conditions must be followed.

(1) The falling time from when the standard length material SW cut by the wire cutting machine 2 falls to the No. 1 lane of the receiving table 31 is ignored and is set to 0 seconds.

(2) Discharge of processed standard-length material SW from automatic processing system 4 and associated unprocessed standard-length material from transfer device 3
Ignore the time required to replenish SW and set it to 0 seconds.

After the automatic processing line starts operating, the signal S ₁ =
0, S ₂ = 0, so there is no output S ₃ , so the wire W is sent to the wire cutting machine 2 at a high speed of v ₁ m/min and cut by the cutting blade that operates every t ₀ sec.
The material is then turned into a standard length material SW having a length L, and is sequentially placed on all of the above lanes. Next, by the operation of the walking beam 3, the standard length workpiece SW is transferred to the automatic processing system, a processing cycle requiring processing time τ is started, and a signal S ₂ =1 is output. However, at this point, the No. 1 lane is empty due to the operation of the walking beam 3, so the detection signal S ₁ from the limit switch LS is 0, so
There is no output of S ₃ , and the wire feed speed is high speed feed v ₁ .
The wire rod W is maintained for t ₀ sec, and after t ₀ sec, the wire rod W is caught by the standard length material SW of length L and falls to the No. 1 lane, and as a result, the signal S ₁ = 1 is output, and the processing is continuing. Therefore, S ₃ outputs, and the wire feed speed is low v ₂ m/
Changed to min. The low-speed _v2 feed continues until the walking beam 3, which operates upon completion of the machining cycle, moves the standard length material SW from the No. 1 lane and leaves the lane empty, and returns to high-speed _v1 at the start of the machining cycle. During the machining cycle τsec, the cutting time of the regular length material SW to be replenished with the regular length material SW processed in the relevant machining cycle is t ₀ = t, and the part T of the cutting time of the regular length material SW to be replenished in the machining cycle. will be included. Therefore, at the start of the next machining cycle, a portion v ₂ T of the length L of the standard length material SW to be replenished corresponding to that machining cycle has already been fed into the wire cutting machine 2. Therefore the high speed v ₁ after the start of the machining cycle
The length of the wire to be sent after returning to is L−v ₂ T
= v ₁ t is sufficient. Furthermore, the machining cycle τ
Even within the processing cycle, the wire rod W corresponding to the processing cycle is fed by v ₂ T, and the residence time of the fixed length material SW on the No. 1 lane is longer than the processing cycle, and accordingly, the wire rod W is fed at a low speed v ₂ T. The length l of the advance feed is Machining cycle l = Tv ₂ /60 = (τ-60/v ₁ L) v ₂ /60 Machining cycle l = Tv ₂ /60 = τv ₂ /60 (1 + v ₂ /v ₁ )−Lv ₂ /v ₁ (1+v ₂ /v ₁ ) Machining cycle l=Tv ₂ /60 =τv ₂ /60 [1+v ₂ /v ₁ +(v ₂ /v ₁ ) ² ]−Lv ₂ /v ₁
[1+v ₂ /v ₁ + (v ₂ /v ₁ ) ² ] Here, replace v ₂ /v ₁ with α = τv ₂ /60 (1 + α + α ² ) − Lα (1 + α + α ² ) Therefore, machining cycle ln = Tnv ₂ /60 = τv ₂ /60 (1+α+α ² …α ^n-1 ) −Lα (1+α+α ² …α ^n-1 ) = τv ₂ /60・1−α ⁿ /1−α−Lτ・1−τ ⁿ / 1-
τ By the way, α<1 Therefore, in machining cycle n → ∞, it increases while decreasing its rate of increase as ln=1/1−α(τv ₂ /60−Lα)=const. Eventually, its value changes over time. In other words, the machining time and the cutting time (t+T) are synchronized. Figure 3b shows high and low feed speeds of the wire rod W for length L, with the high speed feed speed v ₁ being twice the low speed feed speed v ₂ , and the feed start time of the corresponding wire rod W for each machining cycle τ as a reference. The distribution of feeding time is expressed with length L on the vertical axis and time on the horizontal axis. As the cutting time t+T for feeding and cutting the length L with respect to the machining time τ increases as the machining cycle progresses, the time for low-speed feed v ₂ increases, and after several machining cycles, the almost ideal high-speed feed v ₁ and low speed It is clear from FIG. _3b that the processing time .tau. and the cutting time t+T are synchronized by the time distribution with the feed rate v2.

On the other hand, FIG. 3b also shows that the range of the difference in feed length per unit time between high-speed feed v ₁ and low-speed feed v ₂ is
It is shown that the limit of the length L of the standard length material SW and the range of the machining time τ are regulated to enable synchronization of the cutting time t+T and the machining time τ. In other words, when the machining time τ is used as the standard, the high-speed feed v _{1
Lmax and _}
The length of the standard length material SW must be within Lmin, and if the length of the standard material SW is longer than Lmax, it will be waiting for cutting, and if it is less than Lmin, it will be waiting for processing. Also, when using the length of the standard length material SW as a standard, high speed feed v ₁ m/min and low speed feed v ₂
v ₁ and v ₂ respectively indicating feed in m/min only
The machining time τ must fall between τmin and τmax, which are determined by the intersections of L and the length L of the standard length material SW. A processing waiting phenomenon occurs. Therefore, it is necessary to avoid the above phenomenon in implementation. As a countermeasure to this, if the difference between high and low feed speeds is increased, the range in which cutting time t+T and machining time τ can be tuned can be expanded.
However, in this method, if the difference between the two high and low speeds is too large, inertial rotation of the electric motor M and other mechanical problems will occur, making it difficult to properly control the feed.

In order to expand the range in which the above-mentioned cutting time t+T and machining time τ can be synchronized, the present invention provides a high-speed feed v ₁ m/min within a range in which the feed speed can be properly controlled.
and low speed feed v ₂ m/min, from a high feed speed group to a low feed speed group, and from these, set the length L of the standard length material and the machining time τ. The automatic processing line is operated using one set that is appropriately selected depending on the conditions. This is the fourth
A description will be given according to the embodiment shown in the figures. What is shown as 61 in FIG _. 4 is a speed setting device corresponding to ₆ in FIG. It consists of three parallel circuits each connected to a terminal that becomes open when the other is closed.
Parallel circuits Hv ₁ , Mv ₁ and Lv ₁ of high-speed circuit v ₁ and parallel circuits Hv ₂ , Mv _{2 and}
A terminal is inserted into each of Lv ₂ , and among the terminals, Hv ₁ and Hv ₂ are simultaneously closed by select switch Hs, Mv ₁ and Mv ₂ terminals are simultaneously closed by select switch Ms, The Lv ₁ and Lv ₂ terminals are configured to be closed simultaneously by a select switch Ls, and a variable resistor is connected in series to each circuit, and the speed conditions given to the drive source M are controlled by the variable resistor. Depending on the device, the Hv ₁ , Mv ₁ and Lv ₁ circuits are used for high, medium and low rotational speeds in the higher speed range, respectively, and the Hv ₂ ,
The Mv ₂ and Lv ₂ circuits are set to take high, medium, and low rotational speeds in the lower speed range, respectively. Therefore, when starting the operation of the automatic processing line, by selecting the select switch mentioned above, the wire rod feeding speed is switched between two predetermined high and low speeds within a relatively high speed range by selecting Hs, and by selecting Ms. By selecting Ls, the speed can be switched between two predetermined high and low speeds within the intermediate speed range, and by selecting Ls, the predetermined high and low two speeds can be switched within a relatively low speed range.
The wire rod is fed in by changing the stage speed. Therefore, if combinations of high and low feed speeds are arranged side by side or partially overlapped from the high speed range to the low speed range, it is possible to synchronize the cutting time t+T and machining time τ that exist for each set. The range can be expanded dramatically without any difficulty, and it can be done extremely easily by simply operating the select switch button.

Of course, the circuit configuration in which high speed and low speed are one set is not limited to the three sets shown in Fig. 4, but the number of sets is set depending on the processing time associated with the processing content and the length of the regular length material to be processed. . Figure 5 shows an example of this, where the combination of high-level H speeds is v ₁ = 40 m/min, v ₂
= 25 m/min, medium M speed combination v ₁ = 30
m/min, v ₂ = 15 m/min If the combination of lower L speeds is v ₁ = 20 m/min, v ₂ = 8 m/min, it is possible to synchronize the cutting time in accordance with the machining time τ. The length L of the standard length material is expressed as the length L on the vertical axis.
The machining time τ is plotted on the horizontal axis and is shown as H, M, and L, respectively. This allows for an extremely wide range of machining time τ and standard length material SW with three 2-speed combinations.
It is proved that it is possible to synchronize the cutting time t+T and the machining time in response to changes in the length L.

What has been described above is the case when an automatic processing line is operated under standard condition settings.
The present invention exhibits a self-matching function even under special conditions. For example, even if the automatic processing line is brought to an emergency stop for some reason and then restarted, even if the wire has been fed into the wire cutting machine 2 for a certain length, Unless the cut material is fed in and cut, the cut material will not fall and be placed on the No. 1 lane of the pedestal 31 and will not emit the signal S ₁ = 1. If there is no standard-length material on the pedestal 31, the transfer of the standard-length material from the walking beam 3 to the automatic processing system is interrupted, so the signal S ₂ =1 is not transmitted, and the wire rod is The feed rate is maintained at high speed v ₁ to continue cutting, and as the operating time passes, the standard automatic machining cycle that has been set in sequence is returned to. Even if the starting conditions of the respective devices belonging to the automatic processing line are different, this automatic tuning function still performs its function and makes corrections as described above.

In the above embodiment, the limit switch LS and the electric circuit EC are used as the detection mechanism, but the invention is not limited to this. Any means that can detect the presence or absence of the presence may be used, and it goes without saying that the method of transmitting the detection signal to the speed setting device corresponding to the above-mentioned means may also be different from the above embodiment. It is within the scope of the invention.

Furthermore, in the above embodiment, the specified length material is transferred from the automatic transfer device to the automatic processing system and processed, but the automatic transfer device and the automatic processing system are arranged in an overlapping manner, and the automatic transfer device transfers the specified length material to the automatic processing system. It is also possible to set the left and right edges to be machined sequentially while the material is moving. In this case, the automatic transfer device's fixed-length material movement cycle can be set to match the longer machining time of either the left or right end, and A mechanism for detecting as soon as a regular length material is being processed may be provided in the final processing device. It should be noted that the type of processing is, of course, not limited to processing both ends of a regular length material.

The effects of the automatic processing line of the present invention are as follows: (1) By distributing the cutting time required to feed the wire into the cutting machine and cut it by two feed speeds, high and low, (a) Depending on the type of processing. It is possible to synchronize the cutting time with changes in the machining time in automatic machining systems that vary from time to time, and (b) it is possible to synchronize the cutting time with the machining time even if the length of the standard length material to be machined changes. C. Furthermore, even if the machining time and length of the standard length material are changed at the same time, it is possible to synchronize the machining time with the cutting time, D. Moreover, the synchronization is performed by a self-tuning function, and E. Even if there is a limit to the range of length changes for standard-length materials and the range of changes to machining time, settings can be made to correspond to each stage. (2) The function of synchronizing the machining time and cutting time described above can be achieved using extremely simple equipment without using any sophisticated, complicated, or expensive equipment. (3) Therefore, one automatic processing line can process multiple regular length materials of different lengths, and the processing time can vary depending on the combination or selection of multiple processing types. (4) The selection of a select switch that covers the range according to the machining time determined by the type of machining and the length of the standard length material. (5) In the automatic processing line in which the present invention is implemented, the fixed-length material before processing does not make any machining errors, and the automatic feeding device equipped with a temporary stocking function (6) The automatic machining system will no longer have to wait for the arrival of standard length materials, and the automatic machining line will operate automatically, with machining time as cycle time. (7) Complete automation It has great practical effects, such as labor savings, (8) and extremely low equipment costs for automation.

[Brief explanation of the drawing]

Figures 1a, b, and c are front views showing processing examples for explaining the variety of processing on an automatic processing line that implements the present invention, and Figure 2 provides an overview of the embodiment of the present invention. A plan view, FIG. 3a is a diagram for explaining the operation of the apparatus of the present invention, and FIG. 3b is a diagram for explaining that the difference between the cutting time and the processing time in FIG. 3a is sequentially synchronized. , FIG. 4 is a circuit diagram of a speed setting device used in an embodiment of the second invention of the present application, and FIG. 5 is a diagram showing a specific example of a range in which cutting time and processing time can be synchronized according to the second invention. . 1... Automatic feeding device, 2... Wire cutting machine, 3...
...Automatic transfer device, 4...Automatic processing system, 31
...cradle, W...wire rod, SW...standard length material, v ₁ ,
Hv ₁ , Mv ₁ , and Lv ₁ ... High-speed feeding speed of wire or high-speed feeding circuit, v ₂ , Hv ₂ , Mv ₂ and Lv ₂
...Low feeding speed or slow feeding circuit of wire rod, t
...High-speed feed time, T...Low-speed feed time, t+T
...Cutting time, τ...Processing time, L...Length of standard length material, LS, EC...Detection mechanism.

Claims (1)

[Claims] 1. A wire rod cutting machine equipped with an automatic feeding device cuts a wire rod into a predetermined length to obtain a standard length material, and the standard length material is transferred to an automatic processing system by an automatic transfer device. In the case of processing the wire rod by the automatic feeding device, the feeding speed of the wire rod by the automatic feeding device can be automatically switched to a predetermined high or low speed, and as soon as the wire rod is placed on the cradle of the automatic transfer device, the automatic By making it possible to constantly detect whether the machining system is currently machining, the machining system will operate at a low speed only when it detects that a regular-length material is on the pedestal and is being machined, and at a high speed otherwise. By setting automatic switching so that A method for synchronizing a wire cutting machine and a processing system in an automatic processing line, the method comprising sequentially reducing the existing time difference and synchronizing the processing system as the operating time passes. However, when the length of the standard length material is based on the machining time, the length of the standard length material is: Machining time × High speed feed rate > Length of the standard length material > Machining time × Low speed feed speed The machining time when the length of the standard length material is used as the standard The tunable range is defined as length of standard length material/low speed feed rate > machining time > length of standard size material/high speed feed speed. 2. The above-mentioned wire cutting on an automatic processing line in which a wire rod is cut into a predetermined length by a wire cutting machine to obtain a standard length material, and the standard length material is transferred to an automatic processing system by an automatic transfer device and processed. The wire rods are fed into the machine when the wire rods are placed on the cradle of the automatic transfer device.
In addition, when feeding with an automatic feeder that automatically switches to a predetermined low speed when processing is in progress on an automatic processing line, and a predetermined high speed when it is not, a combination of high and low speeds within a higher speed range is used. By providing multiple sets of high and low speeds that are combined within the lower speed range, the cutting required for each set of wire rods to be fed to a wire rod cutting machine for a predetermined length and cut. The time difference between the time and the machining time required for machining a standard-length material with an automatic machining system can be sequentially reduced and synchronized as the operating time progresses. Multiple ranges are set in parallel or partially overlapped. In an automatic processing line, the suitable set is selected and used according to the cutting time, which varies depending on the length of the standard length material, and the processing time, which is determined depending on the type of processing. How to synchronize wire cutting machine and automatic processing system. 3. A wire cutting machine that cuts wire rods whose feeding length is determined by the product of the feed speed of an automatic feeding device and time to produce a standard length material, and selectively performs multiple types of processing on the standard length materials. and an automatic transfer device that transfers the standard length material cut out by the above-mentioned wire cutting machine to the automatic processing system. A detection mechanism that is provided in close proximity to a predetermined position where a standard-length material is placed immediately after cutting, and outputs a signal S ₁ =1 when there is a standard-length material at the predetermined position, and outputs a signal S ₁ =0 when there is no standard-length material at the predetermined position. and a detection mechanism provided in the automatic processing system that outputs a signal S ₂ =1 when a fixed-length material is being processed in the automatic processing system and outputs a signal S ₂ =0 when it is not being processed, and the automatic feeding device. and a speed setting device for setting the rotational speed of the drive source.
The speed setting device has a built-in high-speed circuit and a low-speed circuit that maintain the rotational speed of the drive source at predetermined high and low speeds, _{respectively .} While each output is S ₁ ×S ₂ = 1, the low-speed circuit is closed and the high-speed circuit is opened, and while the output is S ₁ ×S ₂ = 0, the high-speed circuit is closed and the low-speed circuit is opened. By configuring automatic switching, it is possible to eliminate the time difference between the cutting time required to feed a wire rod into a wire cutting machine to a predetermined length and cut it, and the processing time required to process a fixed length material using an automatic processing system. A synchronization device for a wire cutting machine and an automatic processing system in an automatic processing line, characterized in that the synchronization can be performed by sequentially reducing the length as the operating time elapses. 4. A wire cutting machine that cuts wire rods whose feeding length is determined by the product of the feed speed of an automatic feeder and time to produce a standard length material, and selectively performs multiple types of processing on the standard length materials. and an automatic transfer device that transfers the standard length material cut out by the above-mentioned wire cutting machine to the automatic processing system. A detection mechanism that is provided in close proximity to a predetermined position where a standard-length material is placed immediately after cutting, and outputs a signal S ₁ =1 when there is a standard-length material at the predetermined position, and outputs a signal S ₁ =0 when there is no standard-length material at the predetermined position. and a detection mechanism provided in the automatic processing system that outputs a signal S ₂ =1 when a fixed-length material is being processed in the automatic processing system and outputs a signal S ₂ =0 when it is not being processed, and the automatic feeding device. and a speed setting device for setting the rotational speed of the drive source.
The speed setting device has a built-in high-speed circuit and a low-speed circuit in which one is closed and the other is opened by the operation of the relay, and each of the high-speed circuit and low-speed circuit has a plurality of circuits connected to the terminals of the relay. Consisting of parallel circuits, each circuit in the high speed circuit operates from high speed to low speed within a higher speed range.
Each circuit in the low speed circuit is set to a predetermined speed from high speed to low speed within the low speed range, and a terminal is inserted into each circuit, and each of the multiple select switches corresponding to the number of parallel circuits is set. is the terminal of the high-order circuit in the high-speed circuit and the high-order circuit in the low-speed circuit, the terminal of the next circuit in the high-speed circuit and the next circuit in the low-speed circuit, and the terminal of the third-order circuit in the high-speed circuit. and the terminals of the third-place circuit in the low-speed circuit are set so that the corresponding terminals are connected as one set, as shown in the figure, so that the high-speed circuit and the low-speed circuit of each set can be closed at the same time, A high-speed circuit and a low-speed circuit are selected from among a plurality of sets by the select switch according to the cutting time, which varies depending on the length of the standard length material, and the machining time, which is determined by the type of machining. However, while the outputs of the above signals S ₁ and S ₂ are S ₁ ×S ₂ = 1, the low-speed circuit is closed and the high-speed circuit is opened, and while the outputs of the signals S 1 and S 2 are S ₁ ×S ₂ = 0, the high-speed circuit is closed. By configuring the relay to operate as if closing and opening a low-speed circuit, each group can gradually reduce the time difference between the cutting time and the machining time as the operating time progresses, making it possible to synchronize. A synchronization device between a wire cutting machine and an automatic processing system in an automatic processing line, which is characterized by: