JPH03180300A - Method and apparatus for correcting press lead angle - Google Patents

Abstract

PURPOSE:To enable accurate and quick lead angle correction by making forward conversion of an angle set by an ununiform speed system one time a uniform speed system, making lead angle correction into this uniform system and then making backward conversion into the ununiform speed system. CONSTITUTION:When a lead angle correction command is given, a forward conversion means 16 converts a set angle thetas of the ununiform system into a corresponding set angle thetas' of the uniform speed system in accordance with a converted data (thetav, thetar) to be stored in a memory 17. Further, a lead angle correction means 8 a corresponding set angle thetas' and lead angle correction data Td, SPM and makes spark advance correction in the uniform speed system under a prescribed operation to require a corresponding corrected spark advance thetac'. Hereafter, this corresponding corrected spark advance thetac' is converted backward by a backward conversion means 19 into a corrected lead angle thetac of the uniform speed system in accordance with a converted data to be stored in a memory 21. This corrected lead angle thetac is required by each objective drive embodiment and each control object 8.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for correcting the advance angle of a press driven by a press shaft that rotates at an inconstant speed during one cycle.

[Prior Art] In a press, the operations of press constituent devices and peripheral devices are regulated by the rotation angle of a press shaft to ensure smooth operation without interference.

For this reason, the above press configuration equipment and peripheral equipment (hereinafter referred to as
Tentatively named the controlled object. ) at a large angle,
The starting point of the completion operation is set in advance as the cutting angle for each controlled object.

During actual press operation, each time the rotation angle of the press shaft reaches a set large angle or a set cutting angle, a control signal is output for starting and completing the controlled object.

As a means for setting such large angles and cutting angles and outputting control signals, a TATRA type rotor solo-tally cam switch and a child type rotary cam switch are widely used. This is because it has advantages such as high-speed processing of multiple points and easy setting changes.

Incidentally, each controlled object has a delay time as a unique value from when a control signal is input to when the start-up operation and the completion operation are actually completed. Furthermore, the rotation speed of the press shaft, that is, the number of strokes per minute (S
P M ) is generally capable of being switched continuously when it is intermittent.

Therefore, when setting the input angle and cutting angle using the electronic rotary cam switch, it is necessary to correct the setting SPM and the advance angle by the delay time of each controlled object. However, it is troublesome for the operator to perform this advance angle correction while determining the advance angle by manual calculation or the like. Therefore, there is a means for setting the large angle, 0 angle, and a means for setting advance angle correction data such as SPM and delay time! 3 and a means for correcting the lead angle of the large angle and cut angle set based on the lead angle correction data.

Flood angle correction is performed by automatic calculation.

An example of this is Japanese Patent Application Laid-open No. 137099/1983.

2. Problems to be Solved by the Invention] However, the advance angle correction method and device using automatic calculation described above are based on the premise that the rotation of the press shaft at the set S P M rotates at a constant speed during one cycle. Therefore, it can be applied to presses that rotate during one cycle or have nonuniform speeds, and attempts to do so have been abandoned due to the complexity of nonuniform speeds.

However, in line with the current demands for diversification, for example, drawing with fast return characteristics, improving productivity by shortening cycle time, improving drawing performance by keeping the bunch speed constant, or improving drawing performance by keeping the processing speed constant. As presses such as so-called link presses, which are suitable for performing cold forging, have a press shaft that rotates at an inconstant speed during one cycle, these presses are becoming more and more popular. There is a growing demand for development for accurate advance angle correction.

SUMMARY OF THE INVENTION An object of the present invention is to provide a press advance angle correction method and an advance angle correction device that can accurately and quickly correct the advance angle even in a press in which the press shaft rotates at an inconstant speed during one cycle.

[Means for Solving the Problem 1] The invention as set forth in claim 1 is a method for correcting the advance angle of a press driven by a press shaft that rotates at an inconstant speed during one cycle, the advance angle being corrected in an inconstant speed system. Convert the angle to a constant velocity system,
The feature is that after the advance angle is corrected based on the advance angle correction data in this constant velocity system, the angle is inversely converted again to return to the angle that has been corrected for the advance angle of the nonuniform velocity system.

The invention as set forth in claim 2 is a method for correcting the advance angle of a press driven by a press shaft rotating at an inconstant speed during one cycle, the method comprising: predetermining a set angle set in an inconstant speed system; Based on the conversion data between the inconstant velocity system angle and the constant velocity system angle, it is converted to a corresponding setting angle for the constant velocity system, and then the converted corresponding setting angle is corrected with advance angle correction data to obtain a corresponding correction advance. The angle is determined, and then this corresponding corrected advance angle is inversely converted based on the conversion data to determine the corrected advance angle in the non-uniform speed system for outputting a control signal when the rotation angles of the press shafts become equal. Characterized by seeking.

Further, the invention as set forth in claim 3 is an advance angle correction device for a press driven by a press shaft that rotates at an inconstant speed during one cycle, comprising: an angle for operating a controlled object in an inconstant speed system; An angle setting means for setting data, an advance angle correction data setting means for setting advance angle correction data for the controlled object, a memory for storing exchange data between an inconstant velocity system angle and a constant velocity system angle, and the angle. forward conversion means for converting the five setting angles not set by the setting means into machine speed yarn angles based on conversion data stored in the J memory; and a corresponding setting angle converted by the IIN conversion means as false advance angle correction data. a lead angle correction means for correcting the lead angle to obtain a corresponding corrected lead angle; This configuration includes a conversion means and a memory that stores the corrected advance angle obtained by the inverse conversion so that it can be compared with the rotation angle of the press shaft.

Furthermore, in the invention as set forth in claim 4, the lead angle correction data setting means is formed of a delay time setting scale and SPM setting means for manually setting the delay time and SPM of each of the controlled objects in advance. It is characterized by

Furthermore, in the invention as set forth in claim 5, the advance angle correction data setting means automatically detects the SPM from the delay time setting means for manually setting the delay time of each control object in advance and the press operation state. to the advance angle correction means.
It is characterized by comprising an SPM automatic detection means formed to be able to output an M signal.

[Function] In the invention described in claim 1, angles for starting and stopping the controlled object are set in a state in which the press is actually operated, that is, in an inconstant speed system. Then, this set angle is once converted to a constant velocity system, and the advance angle is corrected in this constant velocity system.
It is then transformed back into an inconstant velocity system. Therefore, even if the press has any custom-made inconstant speed rotation, the angle can be set in the actually operating inconstant speed system, so it is easy to handle, and advance angle correction without errors can be accurately and automatically achieved.

Further, in the invention described in claim 2, conversion data between an inconstant velocity system angle specific to the press and a constant velocity system angle when rotating at a constant speed is stored in advance automatically or manually.

Here, the set angle may be set as a value for the non-four-speed system actually used.

Then, the set angle is converted to a corresponding set angle for the W speed system based on the conversion data. Then, in a constant velocity system, the corresponding set angle is subjected to advance angle correction using the advance angle correction data to obtain a corresponding corrected advance angle. Although the advance angle is corrected in a constant velocity system, it can be corrected quickly and accurately as in the conventional system.

Thereafter, the corresponding corrected advance angle is inversely converted based on the conversion data and returned to the corrected advance angle in the non-uniform velocity system. Therefore, if the rotation angle of the press shaft becomes equal to the corrected advance angle, the first control step can be achieved accurately.

That is, once the setting angle is set in the non-uniform velocity system, the advance angle is corrected in the constant velocity system based on predetermined advance angle correction data, and then the angle is reversely converted to the non-uniform velocity system. Therefore, the advance angle can be easily and automatically corrected for any press having nonuniform rotation characteristics.

In the third aspect of the invention, angle data for operating the controlled object is set in the angle setting means. It may be set as the angle of the inconstant velocity system actually operated. Further, in the lead angle correction data setting means, lead angle correction data such as the delay time of the controlled object and the relevant SPM are manually or automatically set.

This advance angle correction data is not related to inconstant velocity systems or constant velocity systems.

Furthermore, conversion data comparing the inconstant velocity system angle and the constant velocity system angle is stored in advance in the memory by writing or automatic detection writing.

Here, when an advance angle correction command is issued, the forward conversion means converts the set angle in the non-uniform speed system into the set angle in the constant speed system, that is, the corresponding set angle, using the conversion data. Next, the advance angle correction means advances the corresponding set angle converted into Y(1) using the advance angle correction data, and obtains the corrected angle in the constant velocity system, that is, the corresponding corrected advance angle.Continued Then, this corresponding corrected advance angle is converted into a corrected advance angle (corrected advance angle) of an inconstant velocity system by an inverse conversion means based on the conversion data, and is stored in a memory.

Therefore, the advance angle can be corrected by simply setting the set angle in the actually operated non-uniform speed system, so any press with non-uniform speed rotation characteristics can be corrected automatically and quickly.

Furthermore, in the invention described in claim 4, since the lead angle correction data setting means is formed of the delay time setting means and the SPM setting means, it is only necessary to manually set the delay time and SPM for each. Automatic advance angle correction is easy.

Furthermore, in the invention set forth in claim 5, since the advance angle correction data setting means is automatically detected and set by the SPM or the SPM automatic detection means, even if the operating speed of the press is changed depending on the processing mode, The lead angle is automatically corrected in real time.

Therefore, it is not necessary to stop the press once and the applicability is wide.9 I-Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(First Embodiment) In FIG. 1, reference numeral 4 indicates a block that rotates at an inconstant speed during a cycle. This press shaft 4 and link mechanism 3
A press 1 is formed by a handle drive shaft 2 and a slide plate (not shown). The drive shaft 2 is rotated at a constant speed by a motor 5 (toy rubber 6), and the rotation speed thereof can be varied by an SPM setting means 111 (details of which will be described later).

The press 1 is provided with a lead angle correction device 10, and is also provided with an automatic conversion data creation device 30 in order to further expand the convenience of the second lead angle correction command IO and to facilitate collection. There is. Note that the memory 21 and the output means 20 forming a part of the advance angle correction device 10 form a conventional general electronic rotary cam switch. In other words, the output means 20 outputs either the rotation angle θp of the press detected by the angle detector 7 connected to the press shaft 11 or the corrected advance angle (
When it becomes equal to (corrected advance angle) θC, a control signal S for starting and completing the controlled object 8 is output. Note that the angle detection 37 is formed from an absolute encoder.

Here, the advance angle correction device 10 sets the value to be stored in the memory 21, that is, the setting angle θS, to the angle (large angle, cutting angle) (large angle, cutting angle) (main angle) obtained by advance angle correction based on the characteristics of the controlled object 8 and the S P M. In the invention, the corrected advance angle θC) is the one in which the breath shaft 4 rotates at an inconstant speed, but the set angle θS and the advance angle correction data (delay time Td, SPM)
It is configured so that it can be automatically calculated just by setting the .

That is, the present advance angle correction device 10 has an angle aQ determining means 11.
and advance angle correction data setting means 12 (delay time setting means 13
．． It is composed of an SPM setting means 14), a memory 15 for storing conversion data, a forward conversion means 16, a memory 17 for storing the corresponding setting angle θS', an advance angle correction means 18, one inverse conversion means, and the memory 21. ing.

The angle setting means 11 sets the operation start point and operation completion point of each controlled object 8 as a set angle θS (large angle, cutting angle) corresponding to the nonuniform rotation angle θV of the press shaft 4. be. 8. The constant angle θS may be set as a value for the inconstant velocity system actually operated, and the operator is not forced to perform dark conversion or the like.

Further, the lead angle correction data setting means 12 (13, 14)
The delay time T d from when the control signal S, which is the national value of the SPM and each controlled object 8, is input (cut off) until the starting operation starts (completion operation ends), that is, the advance angle correction data (
This is a means for setting SPM, Td). This advance angle correction data is easy to set even for an inconstant velocity system such as this press because it is the same as for a conventional constant velocity system. Note that the delay time Td of each controlled object 8 may be constant since it is a unique value, but in order to expand the applicability of the - layer, it is configured such that it can be set as a different value for the press speed, that is, SPM. Good too.

Now, as shown in No. 21k, the memory 15 stores the conversion data (θV, θr) of the so-called open angle of both systems, which compares the angle θV of the inconstant velocity system with the angle θr of the constant velocity system.・This conversion data was created based on the following technique 11i! Sign.

Now, suppose that the press shaft 4 is rotated from the top dead center of the slide (rotation angle 0 degrees), and for example, if we count the clock pulse signals of -running 'tau 12 from the rotation start point 117 until an arbitrary time elapses. , the count value is n, and if the total count value until the press shaft 4 rotates once and returns to the top dead center of the slide is N, then the etc. of the press shaft 4 at the time when the count value n is Rotation angle θ in speed system
r is determined as (n,'N) x 360 degrees.

At the same time, of the rotation angle θρ of the angle detector 7, the rotation angle θ■ (inconstant velocity system angle) when the above counted value becomes n
By comparing the angles θV and θr, it is possible to obtain data for mutually converting the angle θV of the inconstant velocity system and the angle θr of the constant velocity system.

Therefore, biangulation θV and θr may be calculated manually in advance and stored in a table as shown in FIG. will be created automatically. Note that this device 30
The details will be described later.

Next, the forward conversion means 16 converts the set angle θ in the nonuniform velocity system to
This means converts S into an angle equivalent to the setting angle of the constant velocity system, that is, a corresponding setting angle θS' based on the conversion data (θ■, θr). That is, in order to carry out the technical feature of the present invention, ``the angle setting and the generation of the control all signal S are performed in an actual non-uniform velocity system, the advance angle correction is performed in a constant velocity system.'' The constant velocity system angle (θS) is converted into a constant velocity system angle (θS'). The converted constant velocity system angle, that is, the corresponding set angle θS' is stored in the memory 17.

Now, the advance angle correction is performed by the advance angle correction means 18.

The advance angle correction means 18 is formed to have the following calculation functions and the like.

Here, for ease of understanding, the delay time T d of the control pair @8 that lights up the control signal S is 50 rn s e c,
Consider a case where the angle at which the controlled object 8 must complete the startup operation (angle θS of the inconstant velocity system) is 70 degrees.

Then, the angle setting means 11 sets θs = 70 degrees, and this 70 degrees is l1ll'? The conversion means 16 has a second
As shown in the figure, it is stored in the memory 17 after being converted to θS'=40 degrees.

Therefore, the advance angle correction means 18 first calculates the average angular velocity ω of the press shaft 4 in a constant velocity system. This average angular velocity ω
is the SPM set by the SPM setting means 14 or A, then ω=(A/'60sec)X (360 degrees)
-60-A degrees/' S e C.

Here, the average angular velocity in a constant velocity system ω-00・A degree/
s e c, the delay time Td set by the delay time setting means 13 is 5 () m s e (: (5L)
□1O-3sec), and the SPM set by the SPM setting hand fQL4 is 60 sprn, then the advance angle (　) 20 is the equation of motion of the rotating system θ-ωL (θ: angle.

6J diangular velocity, t: time), it is determined as follows.

△θ= (60s p m ・60 degrees/'5ec)X(
50￥C10-'5ec) -18 degrees.

However, the corresponding corrected advance angle θC' obtained by correcting the advance angle θS' corresponding to t and f is θc'=θS'-Δθ=10 degrees-18 degrees=22 degrees.

That is, the constant velocity system angle is 22 degrees.

Thus, the inverse conversion means 1 inversely converts the corresponding corrected advance angle θC' into an inconstant velocity system advance angle correction means degree, that is, a corrected advance angle θC, based on the conversion data (θV, θr). As is clear from FIG. 2, θc'=22 is equal to θC-26 degrees. This corrected advance angle θc (=26 degrees) is stored in the memory 21.

It is clear that the advance angle correction means 18 may perform Δθ-ω·'r[1 in real time, or may prepare a table in advance.

Furthermore, in the above case, in the case where the SPM is 12O5ρm, the corresponding corrected advance angle θC1' is 4 degrees, and the corrected advance angle θC3 is 4 degrees even in an inconstant velocity system, as shown by the two-dot chain line in Fig. 2. degree.

Note that the start and end of the completion operation can be determined in the same manner.

Next, the automatic conversion data creation device 30 will be explained.

The device 30 includes the angle detector 7. Sampling means 31
．． Counter 33. Operation 1a32. Storage means 35 (36
, 37), etc.

The counter 33 counts the clock pulse signal CLK from the clock pulse signal generator 38, and can output the timing and the count value n up to that point every time interval set by the sampling time setter 34. ,
In addition, when the press shaft 4 rotates once, the total count value N can also be output.

Then, the sampling means 31 launches the rotation angle θp at each time point (timing) when the count value n is output,
The angle is stored as the inconstant velocity angle θV and stored in the memory 36.

On the other hand, when the count value]1 is output, the computing unit 32 calculates the angle θr at that time in the constant velocity system, and the memory 37
3. [to make oneself think].

``The 4th speed system degree θr is θr-
It is determined as (n/N) x 360 degrees.

Therefore, the storage means 35 (36, 37) stores the inconstant velocity system angle θ■ and the constant velocity system angle θr, and the comparison data at the same timing is converted data (θV, θr
) is stored in the memory 5.

The storage means 35 and the memory 15 can be formed integrally.

Next, the operation of this embodiment will be explained with reference to FIGS. 1 and 2.

(Create conversion data) This is performed using the automatic conversion data creation device 30.

First, the press shaft 4 is rotated once, and the total count value N of the clock pulse signal CLK of the counter 33 is obtained and temporarily stored in the calculator 32. You can also set it manually.

Next, a sampling interval (ms to μS) is set using the sampling time setter 34, and the press shaft 4 is rotated at an inconstant speed again.

Then, the counter 33 outputs the count value n (at that time) of the set interval to the arithmetic unit 32 (sampling means 31
).

Here, the sampling means 31 detects (latches) the inconstant velocity system angle θV of the press shaft 4 at that point in time and stores it in the memory 36. On the other hand, the arithmetic unit 32 performs a predetermined calculation process to calculate the angle θV of the press shaft 4 at that point in time. The speed system angle θr is calculated and stored in the memory 37.

Thus, the conversion data (θV θr) can be automatically stored in the memory 15.

Here, it can be understood that even if the press shaft 4 rotates at an inconstant speed, such as a link press, it can be converted into a constant speed angle using only the angle detector 7 connected to the press shaft 4.

In addition, the total count value N and the setting interval It (
i! f rt may be determined within the same cycle of the press shaft.

Furthermore, this conversion data creation is based on the press shaft 4 at this time.
The resolution of the converted data can be greatly improved by slowing down the rotational speed of the converter and setting the frequency of the clovk pulse signal CLK to be high.

(Advance angle correction) The angle of the press shaft 4 at which each controlled object 8 should start the starting operation (
θ■) and the angle (θV) at which the completion operation should be completed are set in the angle setting means 11 as an inconstant velocity system angle. Further, each controlled object 8. : Set the delay time Td with SPM
(Press speed) SPM to be operated in setting means 14
Set. That is, advance angle correction data (Td, SPM
).

Here, when a lead angle correction command is given, the +:+n conversion means 16 converts the set angle θS of the infidel system to the corresponding set angle θS of the constant speed system based on the conversion data (θV, θr),
Memorize to 7.

Subsequently, the advance angle correction means 8 manually adjusts the setting angle θS' and the advance angle correction data (Td, Sr-'M) by adjusting χ.
After the above-mentioned predetermined calculation, the lead angle is corrected in the constant velocity system to obtain the corresponding corrected lead angle θC'.

Thereafter, this corresponding corrected advance angle θC' is inversely converted into a corrected advance angle θC of an inconstant velocity system by a single inverse conversion means based on the conversion data, and is stored in the memory 21. This corrected advance angle θC is, for example, 60 s p m as shown in FIG.
, 120 sp rn, which is required for the driving mode as a χ↑ phenomenon, and is also required for each controlled object 8.

(Press operation) If you start the motor 5 and start the breather 1, it will work.

Response 1. lI4 performs press working while rotating at a non-uniform speed during one cycle. As the press shaft 4 rotates, the angle detector 7 momentarily detects the rotation angle θP in the non-uniform speed system and inputs it to the output means 20. do.

The output means 20 stores the manually input rotation angle θp in the memory 2.
1, a control signal S is output to the controlled object 8 to restrict its operation start time (angle) and completion operation start time (angle).

Therefore, smooth press operation without interference between the mold and the conveying means is ensured.

According to this embodiment, the setting angle θ of the inconstant velocity system is
After converting S into the corresponding setting angle θS' of the constant velocity system based on the conversion data (θV, θC), advance angle correction data (T
d, SPM), and the corresponding corrected advance angle θ
Since this is a correction method in which C' is inversely converted again to the corrected advance angle θC of the inconstant speed system and stored, the press shaft 4 can be automatically advanced accurately and quickly even in a press that rotates at inconstant speeds during the cycle. Corner correction is possible. Since the operator can easily set the angle in the non-uniform speed system during actual operation, handling is extremely simple, labor is drastically reduced, and there is no possibility of setting mistakes. As a result, it will greatly contribute to increasing rivalry with Link Press and others.

Further, the advance angle correction device 10 has constant means 1112 (1
3, 14) and each conversion/[stage 16.1'J, advance angle correction means 18, and memory 15.17.21. Corrections can be performed automatically.

Furthermore, an automatic creation device 30 for conversion data (θv, Oc)
Since there is also a predetermined distance, the operator's work such as manual calculation and comparison can be done at once, and this 4'l angle extraction can be performed extremely quickly and accurately.

(Second Embodiment) In this second practical example, as shown in FIG. Manually setting delay time setting method ■3 and S
P M setting means ■ 1 side was removed from 4, but SPM 2'A constant - 1 stage 1.1 was replaced with SPM
It is formed from an automatic detection means 14', and is capable of setting the SPM of the flood angle correction data in real time.

That is, the SPM automatic detector Vj, 14' detects the speed of the press 1 during actual operation using the SP as advance angle correction data.
M is determined and outputted to the advance angle correction means 18. For this reason, the speed of the motor 5 is varied by a speed determiner 6', and the rotational speed of the drive i1[]2 is detected by a tachogenerator 5'. Note that, instead of the tacho generator 5', a pulse generator may be used, for example, and furthermore, it is possible to detect from the press shaft and the 11th rule instead of from the jIB moving shaft 2 or the motor 5. That is, as shown by the two-dot chain line in FIG. 3, the angle detector 7 may be used to detect the press speed in #1.

Further, in order to automatically correct the advance angle in real time, the advance angle correction means 18 and one inverse conversion means receive a new SPM signal from the SPM automatic detection means 14'. When this occurs, the new SPM is used to correct the advance angle and perform inverse conversion.

Therefore, the corrected advance angle θC in the memory 21 is always updated in real time to the latest value when the push speed changes dynamically or passively.

According to this second embodiment, since the SPM of the advance angle correction data is updated and set to match the press speed, the same effects as those of the second embodiment can be achieved. Furthermore, there is no need to manually set the SPM, and the optimum advance angle correction adapted to the press operation mode can be automatically performed, dramatically expanding the applicability.

In each of the above embodiments, the lead angle correction device 10 and the automatic conversion data creation device 30 are configured in a bar-rosync type configuration for convenience of explanation, but the configuration is not limited to this, and for example, as shown in FIG. Similarly, it is also possible to perform horizontal construction using the components of the press control device 100.

In other words, the control device in Figure 4! 100 is a CPU l0I that has a drive control function for the entire press and is in charge of calculations, execution, and instructions.
, a ROM 102 that stores various programs. RAM 103 as memory; keyboard 1041 for setting various data; display 105; clock circuit 10b for time management;
, interrupt time management circuit 107 and input/output board 108 .
It consists of 109 mag. Therefore, in the case of the first embodiment, each setting means 11.12<13° of the advance angle correction means 10
・1) on the keyboard 104, each memory 15.17 2
1 in the RAM 103, the conversion means 16.19 and the advance angle correction means 18 in the CPU LOL and the ROM 102,
It is possible to build horizontally. The same applies to the automatic conversion data creation device 30. For example, the counter 33 is the interrupt time management circuit 107. The clock pulse signal generator 38 can be formed using the RAM 103, or the clock pulse signal generator 38 can be formed using an oscillator in the clock circuit 10.6.

[Effect of Fanming] The invention described in claim 1 converts the angle set in the non-uniform velocity system into a uniform velocity system, and after correcting the advance angle in this uniform velocity system, the angle is changed again to the nonuniform angle. By converting it back to the speed system, we get
The advance angle can be automatically corrected by simply setting the angle in the non-uniform speed system in which the press is actually operated.

Further, the invention described in claim 2 provides a corresponding correction in which the fS setting angle is set as an inconstant velocity system angle and is converted to a corresponding setting angle of a constant velocity system using conversion data, and advance angle correction is performed in the constant velocity system. This method calculates the advance angle and then uses the conversion data to convert it back to the corrected advance angle for a constant velocity system and stores it. Accurate and quick advance angle correction can be performed. As a result, the use of link press etc. can be expanded.

Further, the invention described in claim 3 is formed to include an angle setting means, a lead angle correction data setting means, a memory, a forward conversion means, a lead angle correction means, an inverse conversion means, etc. Since the configuration is such that lead angle correction is performed in a constant velocity system while the output is actually performed in an inconstant velocity system, the setting work for the operator is extremely easy, and lead angle correction is automatically performed accurately and quickly. It can be carried out.

Furthermore, the invention set forth in claim 4 has a configuration in which the delay time and SPM of the controlled object are manually set by the lead angle correction data setting means. is extremely simple.

Furthermore, in the invention as set forth in claim 5, if the delay time of the controlled object is manually set in advance by the lead angle correction data setting means, the SPM is automatically detected and set by the SPM automatic detection means. In addition to the effects of the invention recited in claim 3, the press operation mode can be optimally selected each time, and even in such a case, the advance angle can be automatically corrected in real time.

[Brief explanation of drawings]

Figure 1 is a professional diagram showing the first embodiment of the present invention;
The figures are also diagrams for explaining the operation, FIG. 3 is a block diagram showing the second embodiment, and FIG. 4 is a block diagram showing a modified example. DESCRIPTION OF SYMBOLS 1...Press, 4...Press shaft, 5...Motor, 5'...Tachogenerator, 7...Angle detector, 8...Controlled object, 10...Advance angle correction device , 11...Angle setting means, 12...Advance angle correction data setting means, 13...Delay time setting means, 14...SPM setting means, 14'...SPM automatic detection means, 15...・Memo for storing conversion data 16...Forward conversion means, 17...Memory, 18...Advance angle correction means, 19...Inverse conversion means, 20...Output means, 21...Memory , 30... Automatic conversion data creation device, 31... Sampling means, 32... Arithmetic unit, 33... Counter, 35 (36, 37)... Storage means.

Claims (5)

[Claims] (1) A method for correcting the advance angle of a press driven by a press shaft that rotates at an inconstant speed during one cycle, in which the angle set in the inconstant speed system is once converted to a constant speed system, and then After correcting the lead angle based on the lead angle correction data,
A press advance angle correction method characterized by performing inverse conversion again to return to an angle that has been corrected for an inconstant velocity system. (2) A method for correcting the advance angle of a press driven by a press shaft that rotates at an inconstant speed during one cycle, in which the set angle set in the inconstant speed system is equalized with a predetermined inconstant speed system angle. Based on the conversion data with the speed system angle, it is converted to a corresponding setting angle of the constant velocity system, and then the converted corresponding setting angle is corrected with advance angle correction data to obtain a corresponding corrected advance angle, and then this corresponding correction is performed. The advance angle of the press is inversely converted based on the conversion data to obtain a corrected advance angle in an inconstant velocity system for outputting a control signal when the rotation angles of the press shafts become equal. Corner correction method. (3) An advance angle correction device for a press driven by a press shaft that rotates at an inconstant speed during one cycle, and an angle setting means for setting angle data for operating a controlled object in an inconstant speed system; A lead angle correction data setting means for setting lead angle correction data for the controlled object; a memory for storing conversion data between an inconstant velocity system angle and a constant velocity system angle; forward converting means for converting into a constant velocity system angle based on the conversion data stored in the memory; and correcting the corresponding set angle converted by the forward converting means with the advance angle correction data to obtain a corresponding corrected advance angle. an advance angle correction means; an inverse conversion means for inversely converting the corresponding corrected advance angle obtained by the advance angle correction means based on the conversion data to obtain a corrected advance angle of the nonuniform velocity system; and a correction obtained by the inverse conversion. A press advance angle correcting device comprising a memory that stores an advance angle in a manner that can be compared with the rotation angle of the press shaft. (4) The first stage advance angle correction data setting means is formed of a delay time setting means and an SPM setting means for manually setting the delay time and SPM of each of the controlled objects in advance. The advance angle correction device for the press described in 2. (5) The lead angle correction data setting means includes a delay time setting means for manually setting the delay time of each controlled object in advance, and a delay time setting means that automatically detects the SPM from the press operation state and sends the SPM signal to the advance angle correction means. SP formed to be able to output
4. The advance angle correcting device for a press according to claim 3, further comprising M automatic detection means.