JP3486770B2 - Forging press equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] TECHNICAL FIELD The present invention relates to a press forging of a material.
And a forging press device. [0002] 2. Description of the Related Art Conventionally, in an automatic mechanical forging press,
A load control device has been proposed to improve product thickness accuracy.
(Registered utility model No. 2534472,
JP-A-7-47500, hereinafter referred to as prior arts 1 and 2 respectively.
). FIG. 9 shows a forging press disclosed in prior art 1.
FIG. 4 is a diagram showing a shut height control device of FIG. See FIG. 9
Then, the shut height control device is continuously operated by the mold.
Forging press to form a material into a forged product by stamping
The device 50 is provided. [0004] This shut height control device is made of gold.
Continuously measure the stamping load while in the mold
Measuring means for obtaining the load. The measuring means is a housing
Load sensor 5 provided on 51 columns 51a, 51b
2a, 52b and Dykiss from the output from the load sensor
Load cell converter 53 that calculates and outputs the load
You. Further, the shut height control device is provided with an adjusting device.
A step 54 is provided. This adjusting means 54 includes a CPU 55
Standard stamping load and load cell conversion
Of the measured die load from the measuring device 53 and its deviation
If the deviation exceeds a predetermined allowable value, the deviation
Hydraulic mode based on the shut height correction value corresponding to
Output a drive command to the hydraulic motor 63, and
Adjust the height. FIG. 10 shows a crank disclosed in prior art 2.
It is sectional drawing which shows a press device. Referring to FIG. 10, a crank press device
Numeral 60 denotes a lower mold 63 placed on a bed 61 and a slide
And an upper mold 66 attached to the
The slide mechanism is moved up and down by the link mechanism.
Has been established. In this crank press device 60,
In addition to the mold 63 and the upper mold 66,
When the id 64 is lowered, the upper and lower dies 63 and 66 are completely
Before closing, abutment surfaces 69 and 70 are provided to abut each other.
The stamping load of the press
And set the contact surfaces to contact each other during the molding operation.
By controlling the stamping load of the press, the product
It is configured to achieve thickness accuracy of. [0009] The above-mentioned prior arts 1 and 2
To improve product thickness accuracy in forging press machine
As a countermeasure, the prerequisites have been
Drafting of the stamping conditions to be changed is drastic,
At present, the actual product thickness accuracy has not been improved.
It is. As a specific example, in the prior art 2, in the press
Is a certain fixed condition, for example, the whole process in the press
There is a forged product, if you decide to stamp 100%, always a few articles
Want to stamp by stamping on
Between the production tempo of the forging press and that of the forging press
In some cases, a toothless state may occur temporarily. In particular,
When the equipment becomes faster, this phenomenon occurs more frequently.
You. [0011] Then, the production by load feedback
Since the product thickness cannot be controlled and the total load varies,
The thickness accuracy of the manufactured product is deteriorated. As a result, tooth loss occurs
This means that total thickness accuracy cannot be improved.
You. Further, this problem is solved in consideration of missing teeth.
6-7787 as a slide adjustment mechanism for
No. 8 (hereinafter referred to as “prior art 3”).
There is something. FIG. 11 shows a load control device shown in prior art 3.
FIG. 2 is a diagram showing a schematic configuration of the device. Referring to FIG. 11, an automatic mechanical forging device
80 rises to the eccentric shaft via the connecting rod 83
A plurality of dies are provided on the lower bottom surface of the slide 82 which is suspended freely.
The upper dies 86 are mounted in a row, and the
Forging part in which the lower mold 85 is juxtaposed on the upper surface of
The material is supplied, and it is sequentially fed to the next mold in each single process to complete the molding.
It consists of a transfer unit for taking out finished goods. In this automatic mechanical forging device, each die
Article inspection to detect the presence of material or molding
Based on a detection signal from the detection section 88 and the molded article detection section 88.
Calculation to output the effective command of the additional amount stored in advance
The control section 89 receives the effective instruction and connects to the connecting section.
Eccentric to the wrist pin 85 inserted below the
Turn the adjusting lever 90 to be fitted to the desired angle by hydraulic pressure.
And an operating portion that moves to move the position of the bottom dead center. [0016] However, in the prior art 3 as well,
Riding at high speed is limited and frequent
If it is operated at the same time, there are problems such as poor durability.
In fact, it is not a solution
You. Therefore, a technical problem of the present invention is to prevent tooth slippage.
Stop function and product thickness control function by load control
To provide a forging press device. [0018] According to the present invention, a forging press is provided.
Automated part that feeds material into the forging press part
The material heated in the step and the heating furnace to the automation means
An input-side transport device having a loading means for loading, and
The forging press section performs continuous stamping with a die
In a forging press device for forming a material into a forged product,
The forging press has a shut height that controls the thickness of the molded product.
Control means, wherein the carry-in means sends the data to the automation means.
Material detection to detect whether material to be loaded is supplied
Device and a feed operation control for controlling the feed operation of the automation means.
Control means, and the feeding operation control means includes a
When a detection signal indicating that material is supplied is received from the detector,
Let the automation means perform a normal operation, and
If it does not receive a signal indicating that material is being supplied from
Pause the activating means, and within the set time
When the detection signal of the next supplied material is received,
Activate the means and receive the material detection signal within the set time.
If you do not cut off,
Activating the automation means, the shut height control means
In the state where the material is in the mold, the stamping load is continuously
Measuring means for measuring to obtain a measurement die load;
Comparison between the standard stamping load and the measured stamping load
The deviation is determined, and when the deviation exceeds a predetermined allowable value,
Based on the shut height correction value corresponding to the deviationBefore
Adjusting means for adjusting the shut height.
And a forging press device characterized by the following. [0019] Embodiments of the present invention will be described below.
This will be described with reference to the drawings. FIG. 1 is a perspective view of a forging press according to an embodiment of the present invention.
2 is a block diagram of the line of the transfer device, and FIG.
FIG. 3 is a diagram for explaining the operation of a feeder according to an embodiment of the present invention.
It is a flowchart of the control operation | movement of a forging press apparatus. In FIG. 1, a forging press device 10 comprises
Heating furnaces such as induction heaters for heating materials
1 and the material heated by the heating furnace 1
Conveyor 2 for conveying from the conveyor and forging the conveyed material
Entry side transfer device 3 to be sent to press section 5 and forging of material
Forging press part 5 to be worked, and entry side conveyance in forging press part 5
One of the automated devices that feeds the material from device 3 in order
A transfer feeder 4 and a forging press 5
The material that is placed and transported by the transfer feeder 4
And a multi-step die 6 for forging press. The forging press section 5 has a frame on the outer periphery.
5A. The material W is a forging material having a square cross section.
Are often long billets, but short billets.
Love is also included in the concept. The transport conveyor 2 is provided with a stopper
A shear 9 is provided, and the stoppers 7 and 8 are alternately operated.
To feed the material, and press the pusher 9
The material W is fed into the entrance of the side transfer device 3.
You. The entrance-side transfer device 3 includes an endless belt 11
Is a well-known device that is driven by a motor 12. The transfer feeder 4 is composed of two
A plurality of feed rods 13 (e.g.,
5) gripping claws 14 so that they can be transported.
The pair of gripping claws 14 are configured and known.
Forging press with 4 dies and a die before 1 process
This corresponds to the 0 step of delivering the material. This transfer feeder 4 is shown in FIG.
Clamp the two feed rods 13
Ft → advance → down → unclamp → re
Operate in the order of turns to form the forging press 5
Synchronize with the process, and forging the material from 0 process of forging press 5 to 1 process
For a mold, a two-step mold from a one-step mold to a two-step mold
To three-step molds, three-step molds to four-step molds,
To do. The starting point of the clamp operation
The arrival point of the return operation is the standby position (home position
). Each of the above components is a known forging press
Common to the line. Referring again to FIG. 1, the input side transport device 3
A material detector 15 is provided on one end side. This material inspection
In the detector 15, the material W is supplied to the entrance side of the entrance-side transport device 3.
And outputs the detection signal to the detection output converter 16.
Output. This material detector 15 is, for example,
Use a known hot metal detector such as a
It is configured to detect. The detection output converter 16 is a material detector.
15 and converts it into a digital signal
You. The analog signal from the detection output converter 16 is
It is input to the adjustment arithmetic unit 20 described below. This adjustment arithmetic unit
The feed operation control unit 17 of 20 outputs the detection output converter 16
To the transfer feeder 4 according to the digital signal of
A device that issues an operation command signal and is a known microcontroller.
It consists of an information processing device (CPU) such as a computer.
You. The feed movement provided in the adjustment operation device 20
The control operation of the operation control unit 17 is as follows. First, the feed operation control unit 17 is provided with a material detector.
15 through the detection output converter 16 from the material
When receiving a supply detection signal,
The feeder 4 is caused to perform a normal feed operation. On the other hand, the feed operation control unit 17 is provided with a material detector.
When no detection signal is received from
The feeder 4 is temporarily stopped at the standby position. This pause
Receive the detection signal of the next material to be supplied within the set time
And the transfer feeder 4 are activated, and within the set time
If no material detection signal is received at the end of the set time
At the same time, the transfer feeder 4 is started. Next, a control method of the feed operation control unit 17 will be described.
Will be described in detail based on the flowcharts of FIGS. Normally, the material W is successively transferred to the entrance-side transfer device 3.
The transfer feeder 4 is supplied to the forging press 5
Material W is fed into the forging press 5 in synchronization with the press operation
No. During this time, the transfer feeder 4 performs the normal feeding operation.
Is repeated (step SA1). Here, the material detector 6 is connected to the entrance-side transfer device 3.
If the material W cannot be detected on the entry side (step SA
2 is NO), the feed operation control unit 17
The printer 4 is temporarily stopped at the standby position (step SA3). During the set time for this pause, the following
The material W is supplied to the entry side of the entry-side transfer device 3, and the
When the material detector 15 detects (YE in step SA4)
S), the feed control unit 17 starts the transfer feeder 4.
(Step SA5). In this case, extraction of the material W
The raw material W is sent to the forging press section 5 without injuries.
No birth defects occur. In short, some delay in material supply
As long as it does not deviate from the operation timing of the forging press section 5,
Press work is done normally. Next, during the set time of the pause, the next material
When W is not supplied to the entrance side of the entrance-side transfer device 3, the production
After sending the last billet of the end, or forging press part 5
It is considered that an abnormality has occurred at the upstream transfer facility
It is. In this case, the detection time is not output and the set time
Has elapsed (step SA6), the transformer
The fafeeder 4 is started. The last element at the end of this production
Since the position of the material W can be patterned, it can be shut
It is possible to prevent defective products by adjusting
In the embodiment, the material W is placed on the front mold of the multi-step mold 6.
At the start and end of the work until the
I try not to. FIG. 4 shows a forged preform according to an embodiment of the present invention.
FIG. 2 is a block diagram mainly showing a forging press section of the screw device. Referring to FIG. 4, forging press section 5
This press frame is provided with a frame housing 5A.
The housing 5A includes a bed 21a and a slide 21b.
It is arranged. The detection output converter 16 described above is adjusted
It is connected to the feed operation control unit 17 in the control device 20.
You. In FIG. 4, for convenience of explanation, the bed 21 a
And slide part 21b and shut height adjustment device.
It is shown outside the frame housing 5A. Not shown
However, a lower mold (first mold) is provided in the bed 21a.
The upper slide portion 21b is provided with an upper mold (second mold).
Type) is provided. And shut height H
Is defined by the sliding portion 21a and the sliding portion 21b.
You. The slide portion 21b is moved upward by a hydraulic motor 22.
It is driven in the downward direction, whereby the shut height H
Will change. The material (not shown) is stamped with upper and lower dies.
(Pressed), based on ShutHit H
And forged to a thickness and weight according to the shut height H.
Will be. By the way, as described above, the forging press section
In the case of No. 5, when continuous stamping is performed,
Mold and die holder (press flare)
Thermal expansion occurs in the
The thickness or the like deviates from a predetermined value. In short, forged product spirit
The degree will decrease. Such a decrease in accuracy is due to mold lubrication.
Time when the cooling by the agent and the press are stopped (radiation
Time), mold preheating and mold wear etc.
Therefore, the accuracy variation becomes extremely complicated. With such forging accuracy (weight and thickness)
According to the experiments of the present inventors, the variation is
It was found that there was a correlation with the load. In other words, continuous
During hitting, when stamping with material W
The load (type) applied to the bed 21a and the slide 21b
There is a correlation between the hitting load) and the accuracy of the forged product.
Immediately after restarting the press after stopping, there is no material W
Bed part 21a and slide part 21b at the time of stamping in a state
Load (hereinafter, this load is referred to as the die kiss load)
And forging accuracy. Accordingly, the forging press according to the embodiment of the present invention is
In the wristless device, the shut height control device is a load cell
Shut height system in converter 23 and adjustment arithmetic unit 20
Control unit 24, and as shown in the drawing, a press frame
A load sensor is provided on each of the columns 5B and 5C of the housing 5A.
(Eg, strain gauges) 25a and 25b are provided,
These load sensors 25a and 25b are
It is connected to a converter 23. The load cell converter 23 is provided with an adjustment calculating device.
Connected to the shut height control unit 24 in the
You. The shut height control unit 24 includes a timing determination unit.
26, a press position detector 27 is connected.
Next, a position sensor for detecting the position of the slide portion 21b is provided.
(Encoder) 28 is connected. And
The boat height controller 24 controls the hydraulic pressure as described later.
A motor drive command signal is given to drive the slide portion 21b.
To adjust the shut height H. Specifically, referring to FIGS. 4 and 5,
To adjust the shut height when starting
You. When starting the press, make sure that the material is
Operate the machine without inserting it (there is no material).
Such an operation state is called idle operation. Step SB
1). When stamping is performed without any material, the bed 21
The lower die a contacts the upper die of the slide portion 21b.
And press frame housing according to the load at the time of stamping
5A will be distorted. That is, the bed 21a and the bed
Press frame housing according to the load applied to the ride portion 21b
The body 5A is distorted, and the distortion of the press frame housing 5A is caused.
If the amount of measurement is measured, the bed 21a and the slide 21
It is possible to know the load applied to b (the die kiss load). When stamping is performed without any material (hereinafter referred to as
Below, stamping in this state is called idle operation)
The amount of frame distortion is measured by the strain gauges 25a and 25b.
And given to the load cell converter 23 as a distortion signal.
It is. These distortion signals are supplied to amplifiers 23a and 23a, respectively.
b and converted to multiplexed signal by the multi-brexor 23c
Is done. This multiplexed signal is digitized by the A / D converter 23d.
Shut height control with CPU
Sent to the unit 24. The shut height control unit 24 has a distortion
The relationship between the load and the load (daikiss load) is set in advance.
The shut height control unit 24 converts the digital signal
In response, calculate the daisy load and measure this daisy load.
The memory device is used as the measured dyke load (daikiss load data).
Store in storage 31. In this way, idle operation starts
After that, the measurement of the die kiss load is performed n times (n is an integer of 2 or more).
Perform (Step SB2). Next, the first to n-th die
The kiss load data is sent to the shut height control unit 24,
Stored in the storage device 31. In the shut height control unit 24, a storage device
31 to the first to n-th die kiss load data.
Average to obtain an average die kiss load t1 (step SB)
3). Here, a preset reference die kiss load (a
Load (T1) according to the set reference shut height
In the shut height control unit 24,
The difference between the load T1 and the reference die kiss load T1
(T1-tl) is obtained (step S4), and the absolute value (T
1-t1) exceeds a preset allowable value TC1.
{Absolute value (T1-t1)> allowable value TC1}
The light control unit 24 calculates the shut height adjustment value dh1.
You. Specifically, in the shut height control unit 24, dh
1 = (T1−T1) × C1 is obtained (step SB)
5). Here, C1 is a predetermined constant. The timing determining section 26 detects the press position.
The detection press position detected by the detector 27 is given.
The timing determining unit 26 determines the position based on the detected press position.
Determine whether the shut height adjustment is possible and
Shut height control if shut height adjustment is possible
The section 24 is supplied with a shut height adjustment permission signal.
Then, in response to the shut height adjustment permission signal,
The height control unit 24 converts the hydraulic motor drive command signal to hydraulic pressure.
It is provided to the motor 22 to drive the slide portion 21b (this
, When dh1 is negative, the sliding portion 21b
It is driven downward, and when dhl is positive, the slide portion
21b is driven upward). At this time, the slide portion 21
b is detected by the encoder 28,
It is fed back to the height controller. Shut high
In the controller 24, the detected movement amount is the shut height.
When the adjustment amount dh1 is reached, the hydraulic motor 13 is stopped, and
The correction of the jet height H is completed (step SB6). When the correction of the shut height H is completed, the system
The hat height control unit 24 allows the material to be inserted into the mold.
You. This allows the material to be pressed as described below.
It is started (step SB7). On the other hand, the absolute value (T1-t1) is equal to the allowable value TC.
If it is less than or equal to 1, ｛absolute value (T1−t1) ≦ allowable value TC
1 #, the CPU 15a executes Step SB7. As described above, press of the material is permitted.
Material is inserted into the mold and the stamping is performed.
You. Referring now to FIG. 4 and FIG.
Is started (step SB8), and the mold is
When hitting, the press frame is slightly
And a gap is created between the molds. This stamp
Also in the case of the press frame housing 5A according to the load
Will be distorted, and the amount of frame distortion will be
a and 25b, respectively, and load
It is provided to the meter converter 23. Each of these distortion signals
Amplified by the amplifiers 23a and 23b,
The signal is converted into a multiplex signal at 23c. This multiplex signal is A /
The signal is converted into a digital signal by the D converter 23d and adjusted.
It is sent to the device 20. The shut height control unit 24 includes:
The relationship between the amount of strain and the stamping load (load with material)
Is stored in the storage device 31 in advance.
The height control unit 24 stores the data stored in the storage device 31.
Calculates stamping load in response to digital signal from
You. The stamping load is measured and the stamping load (the stamping load data
Are stored in the storage device 31 again. like this
After starting the actual stamping, measure the stamping load n times
Is performed (step SB9). That is, the first to n-th types
Hit load data is stored from the shut height control unit 24
It is stored in the device 31. Next, the shut height control unit 24 performs the first
To the n-th stamping load data from the storage device 31
And averaged to obtain an average stamping load t2 (Step S
B10). In addition, the shut height control unit 24
Set reference stamping load (reference
Load T2 is applied in accordance with the
In the light control unit 24, the average stamping load t1 and the standard stamping
Compare with the load T2 to find the deviation (T2-t2)
(Step SB11). The absolute value (T2−t2) is set to a preset value.
If the capacity value exceeds TC2, ｛absolute value (T2-t2))> allowable
The value TC2 # and the shut height control unit 24
The site adjustment amount dh2 is calculated. Specifically, the CPU 15
In a, dh2 = (T2−t2) × C2 is obtained (step
SB12). Here, C2 is a predetermined constant.
You. As described above, the shut height control unit 24
Is the shut height adjustment permission from the timing determination unit 26.
When receiving the enable signal, the shut height control unit 24
A motor drive command signal is given to the hydraulic motor 22 to
Drive section 21b (in this case, if dh2 is negative,
In this case, the slide portion 21b is driven downward, and dh2 is
When positive, the slide portion 21b is driven upward.
). At this time, the shut height control unit 24
The detected movement amount of the portion 21b is equal to the shut height adjustment amount dh2.
Then, the hydraulic motor 22 is stopped and the shut height H
Is completed (step S13). Then,
Step SB9 is executed again. On the other hand, the absolute value (T2-t2) is equal to the allowable value TG.
If it is 1 or less, ｛absolute value (T2−t2) ≦ allowable value TG
2｝, the CPU 15a executes Step SB9 again. It should be noted that the stamping is temporarily stopped and restarted.
In the case of
After adjusting the height, the stamping is restarted. When the stamping process is performed as described above,
In this case, as shown in FIG.
Only slightly fluctuates in the vicinity of the weight, and as a result, forged products
Both the thickness and weight of the
It becomes possible. On the other hand, when the shut height adjustment is not performed
As shown in FIG. 8, with the lapse of the stamping processing time,
The stamping load increases, which results in the thickness and weight of the forged product.
The quantity will decrease over time, forgings
Can not maintain the accuracy of. As described above, the embodiment of the present invention
Then, even at the start of stamping, based on the reference die kiss load
Since the shut height is adjusted, the mold and die
The stamping load due to variations in thermal expansion of the holder, etc.
A forged product that can be corrected from the beginning and has high accuracy from the beginning of stamping
Obtainable. [0063] As described above, according to the present invention,
Heating furnace cycle time and forging press cycle time
The supply of material to the entry-side conveyor was delayed due to misalignment
When the transfer feeder stops temporarily,
Prevents material slippage between multi-step molds in the tool
Product, it is possible to minimize the decrease in productivity and
Can also be minimized. In other words, in the present invention, the heating furnace and the forging
Prevent tooth loss even if the synchronization of the wrestling cycle is a little poor
And increase productivity. Further, according to the present invention, at the start of stamping,
Adjust the shut height based on the reference die kiss load
To obtain a highly accurate forged product from the beginning of stamping.
And only by measuring the stamping load,
Since the jet height correction amount can be calculated, the configuration is simple.
And the shut height can be adjusted with high accuracy.
There is an effect that can be cut.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a line of a forging press device according to an embodiment of the present invention. FIG. 2 is an explanatory diagram of an operation of a transfer feeder. FIG. 3 is a flowchart of a control operation of the forging press device according to the embodiment of the present invention. FIG. 4 is a block diagram mainly showing a forging press section of the forging press device according to the embodiment of the present invention. FIG. 5 is a flowchart for explaining shut height adjustment when starting a press. FIG. 6 is a flowchart for explaining shut height adjustment in continuous stamping. FIG. 7 is a diagram showing a relationship between a stamping load and a forged product thickness (weight) when shut height adjustment control is performed. FIG. 8 is a diagram illustrating a relationship between a stamping load and a forged product thickness (weight) when shut height adjustment control is not performed. FIG. 9 is a diagram showing a shut height control device for a forging press disclosed in Prior Art 1. FIG. 10 is a cross-sectional view showing a crank press device disclosed in the related art 2. FIG. 11 is a diagram showing a schematic configuration of a load control device shown in Prior Art 3. [Description of Signs] 1 Heating furnace 2 Conveyor 3 Inlet-side conveying device 4 Transfer feeder 5 Forging press section 5A Press frame housing 5B, 5C Column 6 Multi-step mold 7, 8 Stopper 9 Pusher 11 Endless belt 12 Motor 13 Feed Rod 14 Gripping claw 15 Material detector 16 Detection output converter 17 Feeding operation control unit 20 Adjustment operation unit 21a Bed unit 21b Slide unit 22 Hydraulic motor 23 Load cell converters 23a and 23b Amplifier 23c Multiplexer 23d A / D converter 24 Shut Height control units 25a, 25b Load sensors (strain gauges) 26 Timing determination unit 27 Position sensors (encoders) 50 Forging press device 51 Housings 51a, 51b Posts 52a, 52b Load sensors 53 Load meter converters 54 Adjusting means 55 CPU 56 Hydraulic pressure Motor 60k Link press device 61 Bed 63 Lower die 64 Slide 66 Upper die 69, 70 Contact surface 80 Automatic mechanical forging device 81 Bed 82 Slide 83 Connecting rod 85 Wrist pin 86 Upper die 87 Lower die 88 Mold detection Unit 89 Operation control unit 90 Adjust lever

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-27129 (JP, A) JP-A-50-69668 (JP, A) JP-A-5-319769 (JP, A) JP-A-63-19769 72439 (JP, A) JP-A-4-367400 (JP, A) JP-A-61-22227 (JP, U) JP-A-6-19949 (JP, U) (58) Fields investigated (Int. ⁷ , DB name) B21J 1/00-13/14 B21J 17/00-19/04 B21K 1/00-31/00 B21D 43/00 B21D 43/05 B30B 13/00 B30B 15/00 B30B 15/30 108

Claims (1)

(57) [Claims 1] A forging press section, an automatic means for feeding a material to the forging press section, and a carry-in means for carrying the material heated by a heating furnace into the automation means. A forging press unit, comprising: an inlet-side conveying device, wherein the forging press unit is configured to continuously stamp with a mold to form a material into a forged product; Height control means, the carry-in means, a material detector for detecting whether or not a material to be fed to the automation means is supplied, and a feeding operation control means for controlling the feeding operation of the automation means, The feed operation control unit, when receiving a detection signal indicating that a material is supplied from the material detector, causes the automation unit to perform a normal operation, and outputs a signal indicating that a material is supplied from the material detector. When only not taken, the to pause the automated means activates said automated means upon receipt of a detection signal of the material to be subsequently fed into the pause set time,
When the detection signal of the material is not received within the set time, the automation unit is activated at the same time as the end of the set time, and the shut height control unit continues the stamping load in a state where the material is in the mold. Measuring means to obtain a measurement stamping load by measuring, and comparing a predetermined reference stamping load and the measurement stamping load to obtain a deviation thereof, and when the deviation exceeds a predetermined allowable value, forging press apparatus characterized by comprising an adjustment means for adjusting the pre-Symbol shut height based on the shut height correction value corresponding to the deviation.