CN114054571B - Rapid shape adjusting method of multi-point forming die - Google Patents
Rapid shape adjusting method of multi-point forming die Download PDFInfo
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- CN114054571B CN114054571B CN202111244571.6A CN202111244571A CN114054571B CN 114054571 B CN114054571 B CN 114054571B CN 202111244571 A CN202111244571 A CN 202111244571A CN 114054571 B CN114054571 B CN 114054571B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/02—Die constructions enabling assembly of the die parts in different ways
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Abstract
The invention relates to the field of machining, in particular to a die for shaping a multipoint die to generate a stretched profile in multipoint shapingA quick shape adjusting method of a multipoint forming die comprises the following steps: the first step is that the highest position H after the last shape adjustment of the basic body unit is determined max Determining a reference position H of a base body unit ref (ii) a Second, calculating the secondary reference position H of the basic unit ref To the target position
Motion value Δ H of i (ii) a Third, the basic unit is driven from the current position H i Move to the reference position H ref (ii) a A fourth step of driving the base unit from the reference position H ref Move to the target position
According to the invention, the movement distance of the basic body unit is reduced, and the rotating speed mode of the motor is determined according to the movement amount of the basic body unit, so that the shape adjusting efficiency of the multi-point die is improved from the two aspects.
Description
Technical Field
The invention relates to the field of machining, in particular to a rapid shape adjusting method of a multipoint forming die, which is suitable for the multipoint die to adjust and generate a tensile molded surface in multipoint forming.
Background
When the multipoint forming die is used for shaping and generating a stretching profile, the shaping mechanism is required to finish the shaping, and each die basic body unit is driven by a motor to move to a target position. Because the space restriction of the cross-sectional area of the basic unit of the mould leads to that a motor can not be arranged under each unit, so the motor can not be directly connected and fixed with the basic unit of the mould, but after one basic unit is adjusted, the motor is separated from the basic unit, and then the motor is connected with other basic units and adjusted. Because the motor is not always connected with the mould, a clutch is arranged between the motor and the mould, and because the clutch needs to transmit the torque of the motor to the mould basic body unit, the clutch is contacted by a single leaning surface and can possibly slip, therefore, the clutch is in a tooth-shaped meshing structure, and no gap exists between the forward rotation and the reverse rotation of the clutch after meshing.
The position (current position) of the mold after the last reshaping is known, theoretically, the basic unit can be directly driven to the target position, but in practical situations, before the motor is meshed with the basic unit through the clutch, the motor may need to rotate by a certain angle to enable the clutches to be completely meshed with each other, and the rotating angles of each motor during meshing are not consistent and are not known, so that in the process, the idle rotation angles of the motors are not consistent and cannot be known, the part of gap generated by the movement of the mold is unknown, and the molded surface formed after the final reshaping of the mold has an unknown error with the theoretical molded surface.
The method usually adopted is to move the basic unit from the current position to the zero position (lowest position) and then from the zero position to the target position. The zero point position of each basic body unit needs to be calibrated one by one in advance, the calibrated data is stored in a database, the motion value of each basic body unit is calculated by combining the calibrated data before each shape adjustment, and the calibration process is time-consuming; meanwhile, in the process, the moving distance of the basic body units becomes very long, the multipoint mold is originally composed of hundreds of basic body units, and if each basic body unit is shaped in such a way, the total shaping time becomes very long, and the shaping efficiency is seriously influenced.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a rapid shape adjusting method of a multipoint forming die, the zero position of a die basic body unit is not required to be calibrated, the die basic body unit is not required to be moved to the zero position and then to a target position during each shape adjustment, the basic body unit is moved to a reference position (whether the basic body unit is in place or not is determined by a sensor) which is close to the highest position of the base body unit after the last shape adjustment, and then the basic body unit is moved to the target position, so that the amount of movement of the basic body unit is reduced, the rotating speed mode of a motor is determined according to the amount of movement of the basic body unit, and finally the shape adjusting efficiency of the multipoint die is greatly improved.
In order to realize the effect, the technical scheme of the invention is as follows:
a rapid shape adjusting method of a multipoint forming die comprises the following steps:
in a first step, a reference position H of the basic body unit is determined ref ；
Further, the position of the mold after the last shaping is known, theoretically, the position can only be directly jumped to the second step without the need of the step, but in the actual situation, before the clutch is engaged each time, the motor may need to rotate a certain angle to enable the clutches to be completely engaged with each other, and the rotating angle of each motor is not necessarily the same when each motor is engaged, so that in the process, the idle rotation angle of the motor is not consistent and cannot be known, and therefore, the basic body unit of the mold needs to be moved to a certain known position, namely the reference position H ref And referencing the reference position H ref The system database is stored with the purpose of eliminating this rotational play (the play that occurs when the clutch is engaged).
Highest position H after shape adjustment through last die basic body unit max To determine a reference position H ref The movement distance of the die is as small as possible, and the self movement limit of the basic body unit of the die is set to be H lim Is obviously H ref ≤H lim . Determination of a reference position H ref The limit position H of the movement of the basic die body unit is required to be determined according to lim The judgment is carried out, and two conditions are as follows:
the first condition is as follows: highest position H after last mould basic body shape adjustment max With extreme position H of movement of the mould base unit itself lim Distance is less than H (i.e. H) lim -H max H) reference position H ref ＝H max + h, where h is the customized minimum movement distance for clearance elimination, h should be moderate in size, too small may not play a role in clearance elimination, and too large may increase unnecessary shaping time, thereby reducing efficiency.
Case two: when H is present lim -H max When the time is less than or equal to h, the basic units of the die are movedExtreme position H max As a reference position H ref I.e. H ref ＝H max . At the moment, the basic body of the previous die needs to be adjusted to form a limit position H for movement with the basic body unit of the die lim Determining the basic body unit with the distance less than h, and marking the basic body unit as U i And recording and storing in a database, wherein i is the number of the basic unit.
In determining the reference position H ref Thereafter, each basic body unit is moved to the reference position H ref Theoretical motion value Δ h of i Can pass through delta h i ＝H ref -H i Is calculated to obtain wherein H i Is the current location of the base unit.
Second, calculating the secondary reference position H of the basic unit ref To the target position
Motion value Δ H of i ；
In a first step, the reference position H of the basic body unit has been determined ref It is worth noting that the reference positions H of all the basic body units ref Are all the same, i.e.
Wherein i is the number of the basic body units, and N is the total number of the basic body units;
target position of simultaneous basic body unit
Is also known, so the reference position H of the basic body unit is compared ref And target location
By passing
Calculating to obtain the difference value delta H between the reference position and the target position of the basic body unit i ；
The object is to reduce the amount of movement of the basic body unit as much as possible and to reduce the time consumed in the shape adjustment.
Third, driving the basic body unit to the reference position H ref ；
By means of a determined reference position H ref By moving the basic mould units to the reference position H by means of the shaping mechanism ref And determines whether the mold base body unit is moved in place by a sensor, thereby eliminating the rotational clearance (clearance generated when the clutch is engaged).
For H in the first step lim -H max In the case of > H, the base body unit is moved directly into the reference position H ref Then the method can be carried out;
for H in the first step lim -H max H, the basic body unit to be determined and recorded i U moves downwards H and then moves the basic body unit to the reference position H ref 。
In the whole process, the motor rotating speed mode is determined according to the motor rotating speed mode selection rule.
The basic body unit moving to the reference position H ref Then, the clutch between the motor and the base unit is engaged continuously and cannot be disengaged, and the next step is completed continuously.
A fourth step of driving the base unit to the target position
Here, the basic body unit has been moved to the reference position H ref Thus continuing to drive it to the target position
Each basic body unit motion amount is Δ H calculated previously i In the whole process, the motor rotating speed mode is determined according to the motor rotating speed mode selection rule; movement of the base unit to the target position
After that, the clutch between the motor and the basic unit is separatedRepeating the previous step and the present step to continue driving the remaining basic units until all basic units move to the target position
And then the process is finished.
For the setting of the motor rotation speed modes in the third step and the fourth step, it is obvious that the rotation speed of the motor directly influences the shape-adjusting movement speed of the basic unit, theoretically, the higher the rotation speed of the motor is, the better the motor rotation speed is, but actually, when the multipoint mold is adjusted, the motor should not be too fast in starting and stopping, and the purpose is to reduce the impact on the basic unit, so the rotation speed of the motor is set to be a mode in which the front section and the tail section of the movement run slowly, the middle running is fast, and two modes can be set according to the selection rule of the motor rotation speed modes.
In a first mode: when the amount of movement of the basic body unit is enough, the rotating speed of the motor is changed from the front section to the tail section in the shape adjusting process, namely the speed change mode, and the maximum rotating speed of the motor is set as n max From zero to a maximum speed n max Acceleration is linear with acceleration time t ac ＝t 1 (ii) a From the maximum speed n of the motor max The deceleration to zero speed is also linear with a deceleration time t re ＝t 3 -t 2 The duration of the intermediate maximum speed is t co ＝t 2 -t 1 Wherein n is max Value, t ac Value, t re Value and t co Minimum value of (mint) co ) Are all self-defined.
And a second mode: when the amount of movement of the basic body unit is short, the motor can be in a general rotating speed state, and the general rotating speed is n nor The motor maintains this constant rotational speed throughout the process.
Knowing the pitch P of the basic unit, while the basic unit is moved from the current position H i Moved to a reference position H ref Theoretical motion value Δ h of i Reference position H with respect to the base body unit ref To the target position
Motion value Δ H of i Are known.
From the current position H for the basic body unit i Moved to a reference position H ref The motor speed pattern may be determined by the following rule: when in use
When the mode is selected, selecting a second mode; when in use
Selecting a first mode;
similarly, from the reference position H for the basic body unit ref Move to a target position
The motor speed pattern may be determined by the following rule: when the temperature is higher than the set temperature
When the mode is selected, selecting a second mode; when in use
Mode one is selected.
It is to be noted and is apparent that,
the invention has the advantages that: the zero position of the basic body unit of the die does not need to be calibrated, and the early calibration time is saved; the movement amount of the basic unit body is calculated by comparing the target position with the reference position, so that the movement amount of the basic unit body is reduced, and the shape adjusting time is further greatly reduced; the impact of the motor on the basic unit body is reduced through the determination of the motor rotating speed mode, and the time consumed in the shape adjusting process is further reduced, so that the efficiency of the multipoint forming die during shape adjustment can be effectively improved, and precious production time is saved.
Drawings
FIG. 1 is an overall flow chart of the present invention.
Fig. 2 is a schematic view of the connection relationship between the motor and the base unit according to the present invention.
Fig. 3 is a schematic diagram (case one) of the determination of the reference position of the basic body unit in the present invention.
Fig. 4 is a schematic diagram of the determination of the reference position of the basic body unit in the present invention (case two).
Fig. 5 is a schematic diagram of the reference position and the target position of the basic body unit in the present invention (case one).
Fig. 6 is a schematic diagram of the reference position and the target position of the basic body unit in the present invention (case two).
Fig. 7 is a motor shift pattern of the present invention.
Fig. 8 is the constant speed mode of the motor of the present invention.
In the figure: 1. basic unit of mould, 2, clutch, 3, motor, 4, position (current position) H after last shape adjustment of basic unit i And 5. Basic body unit reference position H ref 6. limit position of movement H of the basic body unit lim 7, current highest position H of basic unit max And 8. Target position of basic unit
Detailed Description
The invention is described in detail below with reference to the attached drawing figures:
the method comprises the following steps: determining a reference position H of the base body unit 1 ref 5
The first condition is as follows:
when the method is used for adjusting the shape of the basic unit 1 of the die for the first time and the current position of the basic unit of the die is unknown, the reference position H of the basic unit ref 5 can be determined empirically and are generally set around the middle of the range of motion of the mould base body unit 1.
And a second condition:
if the mould shape adjustment is completed before and the related data is written into the database, the highest position H after the shape adjustment is carried out by the last mould basic body unit 1 max 7 to determine a reference position H ref 5, the movement distance of the die is as small as possible, and the self movement limit position of the die basic body unit 1 is set to be H lim 6, very clearly H ref ≤H lim . Determining a reference position H ref 5 the limit position H of the movement of the basic die unit 1 is required lim 6, judging, there are two cases:
the first condition is as follows: highest position H after last mould basic body unit 1 shape adjustment max 7 and the movement limit position H of the die basic body unit 1 lim The distance of 6 is less than H, i.e. H lim -H max At > H, reference position H ref ＝H max + h, where h is the user-defined minimum movement distance for clearance elimination, h should be moderate in size, too small may not play a role in eliminating the clearance, and too large may increase unnecessary shaping time and reduce efficiency.
And a second condition: when H is present lim -H max When the speed is less than or equal to H, the die basic body unit 1 moves by itself to the limit position H max 7 as reference position H ref 5, i.e. H ref ＝H max . At this time, the shape of the last mold base body unit 1 needs to be adjusted and then moved to the extreme position H of the movement of the mold base body unit 1 itself lim The 6 basic body units 1 with the distance less than h are determined and marked as U i And recording and storing in a database, wherein i is the number of the basic unit 1.
In determining a reference position H ref After 5, each basic body unit is moved to the reference position H ref Theoretical motion value Δ h of 5 i Can pass through Δ h i ＝H ref -H i Is calculated to obtain, wherein H i Is the current position 4 of the base body unit 1.
Step two: calculating the reference position H of the base unit 1 ref 5 to the target position
Motion value Δ H of 8 i
In a first step, the reference position H of the base body unit 1 has been determined ref 5, it is worth noting thatReference position H of all elementary volume units 1 ref 5 are all identical, i.e.
Wherein i is the number of the basic unit 1, and N is the total number of the basic unit 1.
Target position of the simultaneous basic body unit 1
8 are also known, and therefore compare the reference position H of the base body unit 1 ref 5 and target position
8, by
Calculating the reference position H of the basic body unit 1 ref 5 with the target position
Difference Δ H of 8 i ；
Step three: driving the base unit 1 to the reference position H ref 5
By means of a determined reference position H ref 5, moving the mold base unit 1 to the reference position H by means of the shape-adjusting mechanism ref 5 and determining whether the mold base unit 1 is moved to the reference position H by a sensor ref 5。
For H in the first step lim -H max In the case of > H, the base body unit 1 is moved directly into the reference position H ref 5, obtaining the product; for H in the first step lim -H max H, the basic body unit to be determined and recorded i U moves downwards H and moves the basic body unit 1 into the reference position H ref 5. In the whole process, the motor rotating speed mode is determined according to the motor rotating speed mode selection rule.
The basic body unit 1 moves to the reference position H ref After 5, the clutch between the electric machine 3 and the basic body unit 1The device 2 continues to engage and cannot disengage, and continues to complete the next step.
Step four: driving the basic body unit 1 to the target position H tar 8
Here, the basic body unit 1 has been moved to the reference position H ref 5, thus continuing to drive it to the target position
The amount of movement of each basic body unit 1 is Δ H calculated previously i And in the whole process, the rotating speed mode of the motor 3 is determined according to the rotating speed mode selection rule of the motor 3.
The basic body unit 1 moves to the target position
After 8, the clutch 2 between the machine and the basic units 1 is disengaged, and the shape adjusting mechanism repeats the steps and continues to drive the remaining basic units 1 until all basic units 1 move to the target position
And 8, ending.
For the setting of the rotation speed modes of the motor 3 in the third step and the fourth step, there are two modes:
in a first mode: when the amount of movement of the basic unit 1 is sufficient, the rotating speed of the motor 3 is changed from the front section to the tail section in the shape adjusting process, namely, the speed change mode is obtained, and the maximum rotating speed of the motor 3 is set as n max From zero speed to a maximum speed n of the motor 3 max Acceleration is linear with acceleration time t ac ＝t 1 (ii) a From the maximum speed n of the motor 3 max The deceleration to zero speed is also linear with a deceleration time t re ＝t 3 -t 2 With the intermediate maximum speed lasting for a time t co ＝t 2 -t 1 . Wherein n is max Value, t ac Value, t re Value and t co Minimum value mint of co Are all defined by experience.
And a second mode: when the amount of movement of the base body unit 1 is shortWhen the motor 3 is in a normal rotation speed state, the normal rotation speed is n nor The motor 3 maintains this constant speed throughout the process for empirical customization.
Knowing the pitch P of the basic unit 1, the basic unit 1 is moved from the current position H i 4 to a reference position H ref Theoretical motion value Δ h of 5 i Reference position H with the base body unit 1 ref 5 to the target position
Motion value Δ H of 8 i Are known.
For the base body unit 1 from the current position H i 4 to a reference position H ref The rotation speed mode of the motor 3 can be determined by the following rule: when in use
When the mode is selected, selecting a second mode; when in use
When the first mode is selected;
similarly, for the base body unit 1 from the reference position H ref 5 to the target position
The motor 3 speed pattern can be determined by the following rule 8: when in use
When the mode is selected, selecting a second mode; when in use
Mode one is selected.
It should be noted that the above-mentioned embodiments are illustrative and not to be construed as limiting the invention, and that those skilled in the art will be able to make modifications and adaptations without departing from the principle of the invention and such modifications and adaptations are intended to be considered as within the scope of the invention.
Claims (7)
1. A rapid shape adjusting method of a multipoint forming die is characterized by comprising the following steps:
in a first step, a reference position H of the basic mould body unit is determined ref ；
Second, calculating the secondary reference position H of the basic unit of the mold ref To the target position
Motion value Δ H of i ；
Third, driving the basic die unit to the reference position H ref ；
Fourthly, driving the basic unit of the die to the target position
In the third step and the fourth step, the motor rotating speed mode is determined by selecting a regular quantity according to the motor rotating speed mode;
in a first step, the mould base body unit is moved into a defined reference position H ref And the reference position H is set ref Storing in system database, and adjusting highest position H after last mold basic body unit max To determine a reference position H ref The self-motion limit position of the basic body unit of the die is H lim ，H ref ≤H lim At the determination of the reference position H ref Thereafter, each mold base unit is moved to the reference position H ref Theoretical motion value Δ h of i Can pass through delta h i ＝H ref -H i Is calculated to obtain, wherein H i Is the current position of the basic body unit of the mould.
2. The method for rapid prototyping as in claim 1 wherein the first step is specifically determining the reference position H ref The limit position H of the movement of the basic die body unit is required to be determined according to lim The judgment is carried out, and the judgment is carried out,
situation(s)Firstly, the method comprises the following steps: highest position H after last mould basic body unit shape adjustment max With extreme position H of movement of the mould base unit itself lim Distance greater than H, i.e. H lim -H max >H, reference position H ref ＝H max + h, wherein h is a customized minimum movement distance for clearance elimination;
case two: when H is present lim -H max When the height is less than or equal to H, the highest position H of the mould basic body unit after shape adjustment max As a reference position H ref I.e. H ref ＝H max At the moment, the basic die body unit is adjusted to be in the shape and moves to the limit position H with the basic die body unit per se lim The basic unit of the die with the distance less than h is marked as U i And recording and storing the data in a database, wherein i is the serial number of the basic body unit of the mould.
3. The method for rapid prototyping as in claim 2 wherein the second step is embodied such that the reference position H of the basic body unit of the die has been determined in the first step ref Reference position H of all mould basic body units ref Are all the same, i.e.
Wherein i is the serial number of the basic die body units, and N is the total number of the basic die body units;
target position of basic body unit of mould
Is known, comparing the reference position H of the basic body unit of the mould ref And target position
By passing
Calculating to obtain the reference position and the target position of the basic body unit of the moldAs a motion value Δ H i 。
4. A method for rapid prototyping as described in claim 3 wherein the third step is embodied by determining the reference position H ref By moving the basic mould units to the reference position H by means of a shaping mechanism ref Determining whether the basic die body unit moves in place through a sensor, and further eliminating a rotating gap generated when the motor is meshed with the basic die body unit through a clutch;
for H in the first step lim -H max >H, moving the basic die unit to the reference position H ref ；
For H in the first step lim -H max H, determining and recording the determined and recorded basic die body units U i Moving down H, and moving the basic die unit to the reference position H ref ；
In the whole process, the motor rotating speed mode is determined according to the motor rotating speed mode selection rule,
the basic die unit is moved to the reference position H ref And then, the clutch between the motor and the basic body unit of the die is continuously engaged and cannot be separated, and the next step is continuously completed.
5. Method for the rapid prototyping of a multipoint forming die as set forth in claim 4, characterized in that the fourth step consists in the basic die body unit having been moved to the reference position H ref Thus continuing to drive it to the target position
The movement amount of each mould basic body unit is delta H obtained by previous calculation i In the whole process, determining a motor rotating speed mode according to a motor rotating speed mode selection rule; the basic die unit is moved to a target position
Then, the clutch between the motor and the basic die body units is separated, and the previous step and the current step are repeated to continue driving the rest basic die body units until all basic die body units move to the target positions
And then the process is finished.
6. The rapid prototyping method of the multi-point prototyping mould of claim 5, characterized in that the motor rotation speed mode selection rule in the third step and the fourth step is as follows:
in a first mode: when the amount of movement of the basic body unit of the die is enough, the rotating speed of the motor is changed from the front section to the tail section in the shape adjusting process, namely the speed change mode, and the maximum rotating speed of the motor is set as n max From zero speed to a maximum speed n max The acceleration is linear and the acceleration time is t ac ＝t 1 (ii) a From the maximum speed n of the motor max The deceleration to zero speed is also linear with a deceleration time t re ＝t 3 -t 2 With the intermediate maximum speed lasting for a time t co ＝t 2 -t 1 Wherein n is max Value, t 1 Value, t 2 Value, t 3 The values are all self-defined;
and a second mode: when the movement amount of the basic body unit of the die is short, the motor is in a general rotating speed state, and the general rotating speed is n nor The motor maintains this constant rotational speed throughout the process.
7. The method of claim 6, wherein the pitch of the basic mold unit is known as P, and the basic mold unit is moved from the current position H i Moved to a reference position H ref Theoretical motion value Δ h of i Reference position H of the basic body unit of the mould ref To the target position
Motion value Δ H of i The method comprises the steps of (1) knowing;
from the current position H for the mould base unit i Moved to a reference position H ref When is coming into contact with
When the mode is selected, selecting a second mode; when in use
When the first mode is selected;
from the reference position H for the mould basic body unit ref Moved to a target position
When in use
When the mode is selected, selecting a second mode; when the temperature is higher than the set temperature
When the first mode is selected;
wherein t is co Minimum value mint of co Is self-defined.
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| CN104525668B (en) * | 2014-11-12 | 2016-06-08 | 常州工学院 | Shape method adjusted by the drift of a kind of multi-point forming processing curve |
| CN104393717B (en) * | 2014-12-15 | 2016-08-10 | 上海电气集团上海电机厂有限公司 | A kind of shape adjusting method of multi-point forming flexible die |
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