JP2000263184A - Controller for automatic apparatus in forging press line - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a controller for an automatic apparatus in a forging press, by which the phenomenon that materials are omissively fed is prevented, and the forging precision and the productivity can be improved. SOLUTION: In an inlet side carrying device 3, a material detector 6 for detecting whether the feeding material is supplied into a transfer feeder 4 or not, and the control unit 7 for controlling the feeding movement of the transfer feeder 4 are provided. This controller 7 executes the ordinary feeding movement to the transfer feeder 4 when such detecting signal as to supply the material is received from the material detector 6, and temporarily stops the transfer feeder 4 at a waiting position when the detecting signal is not received from the material detector 6, and then, when the detecting signal of the material to be successively supplied is received within the setting time of this temporary stop, the transfer feeder 4 is started, and reversely, when the detecting signal of the material is not received within the setting time, the transfer feeder 4 is started at the same time of completing the setting time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for an automation device in a forging press line. More specifically, the present invention relates to a device for preventing a decrease in productivity caused by a synchronization of a production tempo between a heating furnace in a forging press line and an automatic device for supplying a material to the forging press being out of synchronization.

[0002]

2. Description of the Related Art Conventionally, it has been difficult to perfectly synchronize the cycle time between a heating furnace and an automatic forging press apparatus (for example, a transfer feeder) in a forging press line. The reason is as follows. Generally, the heating furnace adjusts the production tempo by the billet feed speed. A mechanism for feeding a billet of a heating furnace is generally a mechanism for sandwiching a billet between upper and lower gears and rotating the gear. The feed speed is determined by controlling the number of rotations of the gear. Accordingly, the slippage between the gear and the billet or the cut end face of the billet is slanted, and if there is a burr or a burr, there is no gap between the billet and the actual production tempo varies. This makes perfect entrainment difficult.

[0003] If not synchronized as described above, the following problem occurs. If the production tempo of the heating furnace is faster than the production tempo of the transfer feeder, the number of billets coming out of the heating furnace is larger than the forging press throughput, so there may be a transfer error between the heating furnace and the forging press, or the billet is rejected. As a result, the operation rate is reduced and the amount of reject material (defective products) is increased, leading to a decrease in productivity. If the production tempo of the heating furnace is slower than the production tempo of the transfer feeder, the state in which the billet coming out of the heating furnace is smaller than the processing amount of the forging press causes a missing tooth between the multi-step dies in the forging press. Therefore, since the total forging load varies, the thickness accuracy of the forged product is degraded, and a product with poor accuracy is generated, thereby deteriorating productivity. However, since the above-described adjustment is an adjustment method that allows the generation of the reject material from the beginning, such adjustment for reducing the productivity is not practical or employed.
Therefore, in most cases, as described above, the production tempo of the heating furnace is adjusted to be slightly slower than the production tempo of the transfer feeder. For this reason, the phenomenon of missing teeth occurs in a certain synchronous state.

[0004] The phenomenon of tooth loss will be described in detail as follows. Cycle time 3 seconds (Productivity
4 forging presses at a production tempo of 1200 pieces / hour)
Suppose that all the processes are stamped in the process. 100% die stamping is one of the transport methods of press production, in which a forged product is forged in all steps (1 to 4 steps) of a multi-step die, and forged and transported at one stroke in one stroke of a press. It is. In the above case, the transfer feeder of the forging press operates in a cycle of 3 seconds, but the heating furnace produces a billet with a slightly longer cycle time for the above reason. When the slight deviation of the cycle time is accumulated up to about one cycle time, a phenomenon called omission occurs. More specifically, the forging press from 1 to 4 steps in which all the forged products are formed and produced is removed from the forging in one step and is formed in only 2 to 4 steps. Once the omission occurs in this one step, in the next cycle, molding is performed in one step, three steps and four steps after two steps are eliminated, and three steps and four steps are sequentially performed. When this omission occurred, the entire forging process was performed with a forging load of 2,000 tf and a press deformation of 2 mm and a product thickness of 25 mm was removed. The load of the forging process was removed, and for example, there was a 1000 tf forging load in three finishing processes. In this case, the load of 1000 tf disappears and the deformation of the press is reduced by half to 1 mm, and the product thickness becomes 24 mm.

In order to solve this problem, Japanese Patent Publication No. Hei 6-77878 entitled "Load control device for automatic mechanical forging press" has been proposed as a slide adjusting mechanism. However,
Since the slide adjustment is operated at a high speed, the structure becomes complicated, and it is considered that operating a portion to which an impact load is applied is not good in terms of durability.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above circumstances, and has solved a problem that occurs in a forging press line due to a shift in the production tempo between a heating furnace and a forging press automation device, resulting in a stable operation. It is an object of the present invention to provide a control device capable of securing product accuracy and improving productivity.

[0007]

The control device of the automation device in the forging press line according to claim 1 comprises: a forging press;
In the forging press line having an automation device for feeding the material to the forging press and an input side transfer device for feeding the material heated by the heating furnace to the automation device, the material to be fed to the automation device is supplied to the input side transfer device. A material detector for detecting whether or not there is, and a control device for controlling the feed operation of the automation device, the control device, when receiving a detection signal of material supply from the material detector, the When the automation device performs a normal feeding operation and does not receive a detection signal from the material detector, the automation device is temporarily stopped at a standby position, and the next material to be supplied within a set time of the pause is set. When the detection signal is received, the automation device is started, and when the detection signal of the material is not received within the set time, the automation device is started at the same time as the end of the set time. It is characterized in.

According to the first aspect of the present invention, if the supply of the material to the entrance-side conveying device is performed smoothly, the material is fed into the forging press by a normal feeding operation. When the supply of the material to the entrance-side transport device is delayed, if the delay is within the set time, the automation device is started immediately and is fed into the forging press, so that the material does not fall out. If the supply of material to the entry side transfer device is delayed for more than the set time or the supply is
After the set time is over, the automation device is started, but if material is missing in the setting process at this time, it ends only with that process, and it does not affect the subsequent process and the tooth loss does not continuously shift, so In addition, a decrease in productivity can be minimized.

[0009]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a forging press line to which the present invention is applied, FIG. 2 is an explanatory diagram of an operation of a transfer feeder, and FIG. 3 is a flowchart of a control operation in a control device of the present invention.

In FIG. 1, reference numeral 1 denotes a heating furnace such as an induction heater for heating a material; 2, a conveyor for transferring the heated material from the heating furnace 1 to a post-writing side conveying device 3;
Reference numeral 3 denotes a transfer device for feeding the material into a transfer feeder 4 to be described later. Reference numeral 4 denotes a transfer feeder, which is one of automated devices for sequentially transferring the material between multi-step dies 6 in a forging press 5 to be described later. Frame.
Note that the material W is a forging material having a square cross section, and is often a long billet, but a slab having a short length is also included in the concept.

The transport conveyor 2 has stoppers 21,
22 and a pusher 23, and the stopper 2
1 and 22 are alternately operated to take the material supply timing, and the pusher 23 feeds the material W to the entrance side of the entrance side transport device 3. The entrance-side transport device 3 is a known device that drives an endless belt 31 with a motor 32.

The transfer feeder 4 is provided with a plurality of (for example, five for each) feed rods 41, 41 arranged in parallel.
) And a pair of gripping claws 42 is used to carry the material. This corresponds to the 0 process to be delivered. As shown in FIG. 2, the transfer feeder 4 holds two feed rods 41, 41 by clamping, lift, advance, and advance.
Operate in the order of down → unclamping → return, and synchronize with the stamping process of the forging press 5, and change the material from 0 process to 1 process die of the forging press 5 to 1 process die to 2 process die. In this method, the two-step mold is fed in order to the three-step mold, and the three-step mold to the step mold. The starting point of the clamp operation, that is, the arrival point of the return operation is the standby position (home position).

The above components are common to known forging press lines. In FIG. 1, reference numeral 6 denotes a material detector, which detects that the material W has been supplied to the entrance side of the entrance side transport device 3. The material detector 6 is configured to detect a temperature equal to or higher than a set value, for example, a known hot metal detector.

A control device 7 receives a detection signal from the material detector 6 and issues an operation command signal to the transfer feeder 4. The control device 7 is constituted by a known information processing device such as a microcomputer. .

The control operation of the control device 7 is as follows. (1) When a detection signal indicating that material is supplied is received from the material detector 6, the transfer feeder 4 is caused to perform a normal feeding operation. (2) When the detection signal is not received from the material detector 6, the transfer feeder 4 is temporarily stopped at the standby position. If the detection signal of the material to be supplied next is received within the set time of the temporary stop, the transfer feeder 4 is started. If the detection signal of the material is not received within the set time, the transfer feeder 4 is ended simultaneously with the end of the set time. 4 is started.

Next, the control method will be described in detail with reference to the flowcharts of FIGS. (1) Usually, the material W is supplied one after another to the entrance-side transfer device 3,
The transfer feeder 4 feeds the material W to the forging press 5 in synchronization with the press operation of the forging press 5. During this time, the transfer feeder 4 repeats the normal feeding operation (step 100).

(2) When the material detector 6 cannot detect the material W on the entrance side of the entrance-side conveying device 3 (step 101 · N
O), the control device 7 temporarily stops the transfer feeder 4 at the standby position (step 102).

During the set time for temporarily stopping, the next material W is supplied to the entry side of the entry side transport device 3, and when the material detector 6 detects this (step 103 YES).
), The control device 7 activates the transfer feeder 4 (step 104). In this case, since the material W is applied to the forging press 5 without missing the tooth of the material W, no production failure occurs. In short, some delay in material supply is caused by the forging press 5
As long as the operation timing does not deviate, the press work can be performed normally.

Next, when the next material W is not supplied to the entrance side of the entrance side transport device 3 during the set time of the temporary stop,
After sending the last billet at the end of production or forging press 5
It is probable that the above occurred at the upstream transfer facility on the upstream side. In this case, if the set time passes without a detection signal being issued (step 105), the transfer feeder 4 is activated at that time. Since the position of the last material W at the end of the production can be patterned, a defective product may not be produced by adjusting the shut height. However, in the present embodiment, the defective material W is placed on the front die of the multi-step die 6. At the start of work and the end of work until the material W is arranged, no control operation is performed.

[0020]

According to the first aspect of the present invention, when the supply of the material to the entrance side transfer device is delayed due to a difference between the cycle time of the heating furnace and the cycle time of the forging press, the transfer feeder is temporarily stopped. As a result, it is possible to prevent the material from missing between the multi-step dies in the forging press, so that the reduction in productivity can be limited to a minimum and defective products can be suppressed to a minimum. In other words, according to the present invention, even if the cycle of the superheater and the cycle of the forging press are slightly inferior, it is possible to prevent omission and improve productivity.

[Brief description of the drawings]

FIG. 1 is a block diagram of a forging press line to which the present invention is applied.

FIG. 2 is an explanatory diagram of an operation of a transfer feeder.

FIG. 3 is a flowchart of a control operation in the control device of the present invention.

[Explanation of symbols]

 Reference Signs List 3 Inlet-side conveying device 4 Transfer feeder 5 Forging press 6 Material detector 7 Control device

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4E087 AA10 BA14 CA11 CB01 DA01 EA00 EA15 EB07 EC01 ED33 FA01 FA23 FB05 GA01 GA04 GA06 GA20

Claims (1)

[Claims] In a forging press line having a forging press, an automatic device for feeding a material to the forging press, and an input-side transfer device for feeding the material heated by a heating furnace to the automatic device, the fore-end transfer device is A material detector for detecting whether or not the material to be fed to the automation device is supplied; and a control device for controlling a feeding operation of the automation device, wherein the control device has a material supply from the material detector. When the detection signal is received, the automation device performs a normal feeding operation, and when the detection signal is not received from the material detector, the automation device is temporarily stopped at a standby position, and this pause setting is performed. When the detection signal of the material to be supplied next is received within the time, the automation device is activated, and when the detection signal of the material is not received within the set time, at the same time as the end of the set time. A control system for an automatic apparatus in the forging press line, characterized in that activating the automation device.