CN112718942A - Bending angle correction method for bending machine - Google Patents
Bending angle correction method for bending machine Download PDFInfo
- Publication number
- CN112718942A CN112718942A CN202011439264.9A CN202011439264A CN112718942A CN 112718942 A CN112718942 A CN 112718942A CN 202011439264 A CN202011439264 A CN 202011439264A CN 112718942 A CN112718942 A CN 112718942A
- Authority
- CN
- China
- Prior art keywords
- bending
- angle
- plate
- control system
- actual
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005452 bending Methods 0.000 title claims abstract description 414
- 238000012937 correction Methods 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 37
- 230000008569 process Effects 0.000 claims abstract description 14
- 230000009471 action Effects 0.000 claims abstract description 9
- 238000004364 calculation method Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000012545 processing Methods 0.000 description 5
- 230000002457 bidirectional effect Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010009 beating Methods 0.000 description 2
- 230000000875 corresponding effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Images
Classifications
-
- 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
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/004—Bending sheet metal along straight lines, e.g. to form simple curves with program control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
-
- 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
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/006—Bending sheet metal along straight lines, e.g. to form simple curves combined with measuring of bends
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention discloses a bending angle correction method for a bending machine, which comprises the following steps: 1. the angle correction system sends a pre-bending angle signal to the control system; 2. pre-bending the plate by using a bending machine and calculating compensation stroke data; 3. the bending machine performs compensation bending on the plate; 3.1, the bending machine executes bending action, and the angle correction system measures the actual bending angle; 3.2 the angle correction system feeds back the actual bending angle to the control system, and the control system compares the actual bending angle with the target bending angle; 3.3, the control system controls the bending machine to release the plate after compensation bending, the angle correction system detects and calculates compensation stroke data of the plate, the compensation stroke data are fed back to the control system, and the step 3.1 is returned; 4. and controlling the return stroke of the bending machine by the control system, and finishing the bending angle correction. The invention can achieve the bending target angle through pre-bending and one-time compensation correction, has high bending precision, does not need manual intervention in the bending process, and improves the efficiency and quality of the bending process.
Description
Technical Field
The invention relates to a control method of a bending machine, in particular to a bending angle correction method for the bending machine.
Background
The bending machine is a machine capable of bending a metal plate, and mainly comprises a support, a workbench, a clamping plate, an upper bending die, a lower bending die and the like. Because the panel beating has certain resilience characteristic, probably kick-backs and lead to the angle unqualified of bending after bending the release, in order to ensure the machining precision of bender, prior art's bender carries out the secondary or bend many times to the panel beating through angle compensation's mode.
The angle compensation device in the prior art comprises a hydraulic compensation device or a mechanical compensation device, and the working principle is as follows: setting a bending target angle, taking down the plate after bending and manually measuring a bending actual angle, if the bending actual angle is 1.5 degrees larger than the bending target angle, presetting a compensation value of 1.5 degrees before the bending machine bends for the second time, bending the plate for the second time by the bending machine according to the preset compensation value, taking down the plate after bending and manually measuring the bending actual angle, if the bending actual angle is 0.5 degrees larger than the bending target angle, presetting the compensation value of 1.5 degrees +0.5 degrees before the bending machine bends for the third time, and so on until the bending angle meets the plate processing requirement; and the subsequent bending of the plate can adopt a preset compensation value which finally meets the plate processing requirement. Because at the actual in-process of bending, the bender can't once reach the angle of presetting bending, need carry out artifical measurement and revise the offset and carry out corresponding action of bending again before bending at every turn, the operation is very inconvenient, and is inefficient, and the angle precision of bending is lower. Meanwhile, in the long-term production process of the bending machine, the performance of the bending machine is continuously reduced, the bending angle is subjected to larger and larger deviation, and the angle accuracy of plate bending processing can be ensured only by manually measuring and modifying a compensation value.
Chinese patent application CN201910439425.5 discloses a precision bending machine mechanical compensation workbench with an integral waveform sloping block structure, and specifically discloses: the workbench comprises a base and a cover plate, wherein a first square groove and a second square groove are formed in the cover plate; an upper inclined block and a lower inclined block which are both of a wave structure and are matched through a plurality of bidirectional inclined planes are arranged in the second square groove; the upper inclined block units are sequentially arranged and are in clearance fit, the upper surface of each upper inclined block unit is horizontal, and the lower surface of each upper inclined block unit is provided with a bidirectional inclined plane; the lower inclined block is of an integral structure, the lower surface of the lower inclined block is horizontal, and the upper surface of the lower inclined block is provided with a plurality of bidirectional inclined planes which correspond to the bidirectional inclined planes of the upper inclined block units one by one. This workstation needs to realize high accuracy and compensation function through the one-to-one cooperation of upper and lower inclined plane, and the compensation operation is inconvenient, and the compensation volume is decided by the inclined plane length of upper and lower voussoir, and the compensation precision angle, the controllability is relatively poor.
Disclosure of Invention
The invention aims to provide a bending angle correction method for a bending machine, which can achieve a bending target angle through pre-bending and one-time compensation correction, has high bending precision, does not need manual intervention in the bending process, and improves the efficiency and quality of the bending process.
The invention is realized by the following steps:
a bending angle correction method for a bending machine comprises the following steps:
step 1: an angle correction system of the bending machine sends a pre-bending angle signal to a control system;
step 2: the control system controls the bending machine to pre-bend the plate and calculates compensation stroke data;
and step 3: the control system controls the bending machine to perform compensation bending on the plate;
the specific steps of the compensation bending of the plate are as follows:
step 3.1: the control system controls the bending machine to perform bending action according to the compensation stroke data, releases the compensated bent plate and detects the bending actual angle of the plate through the angle correction system, namely the rebounded angle of the plate after the plate is released again;
step 3.2: the angle correction system feeds back the detected actual bending angle to the control system, and the control system compares the actual bending angle with the bending target angle:
I. if the actual bending angle is smaller than the target bending angle, executing the step 3.3;
II. If the actual bending angle is equal to the target bending angle, the plate bending process is finished, and the step 4 is carried out;
III, if the actual bending angle is smaller than the target bending angle, sending an angle abnormity alarm, and turning to the step 4;
step 3.3: the angle correction system detects and calculates the compensation stroke data of the plate, feeds the data back to the control system, and returns to the step 3.1;
and 4, step 4: and controlling the return stroke of the bending machine by the control system, and finishing the bending angle correction.
In the step 1, the pre-bending angle signal includes a pre-bending set angle, and the pre-bending angle set value is greater than the bending target angle.
The pre-bending set angle is 2-5 degrees larger than the bending target angle.
In the step 2, the specific steps of pre-bending the plate are as follows:
step 2.1: the control system controls the bending machine to perform pre-bending action on the plate according to the pre-bending angle signal and the bending target angle, releases the pre-bent plate and detects the pre-bending actual angle of the plate through the angle correction system, namely the rebounded angle of the plate after the plate is released;
step 2.2: the angle correction system feeds the detected pre-bending actual angle back to the control system, and the control system compares the pre-bending actual angle with the bending target angle:
I. if the actual pre-bending angle is larger than the target bending angle, executing the step 2.3;
II. If the pre-bending actual angle is equal to the bending target angle, the plate bending process is finished, and the step 4 is carried out;
III, if the actual pre-bending angle is smaller than the target bending angle, sending an angle abnormity alarm, and turning to the step 4;
step 2.3: the angle correction system detects and calculates the compensation stroke data of the plate and feeds the data back to the control system.
The detection and calculation method of the compensation stroke data of the plate comprises the following steps:
step S1: the angle correction system detects the angle before rebounding of the plate before releasing and the angle after rebounding of the plate after completely releasing;
step S2: the angle correction system calculates the rebound angle according to the rebound front angle and the rebound rear angle, and the calculation formula is as follows: the rebound angle is the angle after rebound-the angle before rebound;
step S3: and calculating the compensation stroke data of the upper beam of the bending machine during the next bending according to the springback angle.
In the step 2.2, when the pre-bending actual angle and the bending target angle are compared, the difference between the bending angles is set by the control system, and when the absolute value of the pre-bending actual angle-the bending target angle is less than or equal to the absolute value of the difference between the bending angles, the control system judges that the pre-bending actual angle is equal to the bending target angle.
In the step 3.2, when the actual bending angle is compared with the target bending angle, the difference between the bending angles is set by the control system, and when the absolute bending angle-the target bending angle is less than or equal to the absolute bending angle, the control system determines that the actual bending angle is equal to the target bending angle.
The allowable difference value of the bending angle is 0.3 degrees.
Compared with the prior art, the invention has the following beneficial effects:
1. the bending angle detection device disclosed by the invention realizes real-time detection of the bending angle after each bending action through the angle correction system, realizes accurate compensation of the next bending action according to the resilience angle of the bending machine before and after the plate is released, has high automation degree, does not need manual intervention in the bending process, and improves the efficiency and quality of the bending procedure on the basis of ensuring the precision of the bending angle.
2. According to the invention, the actual bending angle of the plate is detected through the angle correction system, so that the bending process can be reflected more accurately and actually, the compensation value does not need to be modified manually for many times, the accuracy of the next bending is ensured through automatically calculating the compensation stroke data, the compensation bending each time is more accurate, and the rejection rate of the plate is reduced.
Drawings
Fig. 1 is a flow chart of the bending angle correction method for the bending machine according to the invention.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Referring to fig. 1, a method for correcting a bending angle of a bending machine includes the following steps:
step 1: and the angle correction system of the bending machine sends a pre-bending angle signal to the control system. The angle correction system is arranged on the lower beam of the bending machine, so that the bending angle parameters of the plate can be conveniently collected in real time.
The pre-bending angle signal comprises a pre-bending set angle, and the pre-bending angle set value is larger than a bending target angle.
The pre-bending set angle is 2-5 degrees larger than the bending target angle, preferably 3 degrees, and can be determined according to different bending machine performances and processing requirements.
Step 2: and the control system controls the bending machine to pre-bend the plate and calculates compensation stroke data.
The specific steps of the pre-bending plate are as follows:
step 2.1: the control system controls the bending machine to perform pre-bending action on the plate according to the pre-bending angle signal and the bending target angle, releases the pre-bent plate and detects the pre-bending actual angle of the plate through the angle correction system, namely the rebounded angle of the plate after the plate is released.
Step 2.2: the angle correction system feeds the detected pre-bending actual angle back to the control system, and the control system compares the pre-bending actual angle with the bending target angle:
I. and if the actual pre-bending angle is larger than the target bending angle, executing the step 2.3.
II. And if the pre-bending actual angle is equal to the bending target angle, finishing the plate bending process and turning to the step 4.
And III, if the actual pre-bending angle is smaller than the target bending angle, sending an angle abnormity alarm, and turning to the step 4.
Step 2.3: the angle correction system detects and calculates the compensation stroke data of the plate and feeds the data back to the control system.
When the pre-bending actual angle and the bending target angle are compared, a bending angle allowance value is set through the control system, and when the pre-bending actual angle-the bending target angle is less than or equal to the bending angle allowance value, the control system judges that the pre-bending actual angle is equal to the bending target angle. Because of the influence of factors such as mechanical structure, panel characteristics, some small errors inevitably exist in the bending angle, and a certain bending error can be allowed through the setting of the allowable difference value of the bending angle, so that excessive bending or repeated working procedures are avoided.
And step 3: and the control system controls the bending machine to perform compensation bending on the plate.
The specific steps of the compensation bending of the plate are as follows:
step 3.1: and the control system controls the bending machine to perform bending action according to the compensation stroke data, releases the compensated bent plate and detects the bending actual angle of the plate through the angle correction system, namely the rebounded angle of the plate after the plate is released again. The angle correction system can be provided with a laser angle detection device, laser is projected on the plate to quickly detect the actual bending angle value of the plate, and the detection accuracy, the real-time performance and the stability are higher.
Step 3.2: the angle correction system feeds back the detected actual bending angle to the control system, and the control system compares the actual bending angle with the bending target angle:
I. and if the actual bending angle is smaller than the target bending angle, executing the step 3.3.
II. And if the actual bending angle is equal to the target bending angle, finishing the plate bending process and turning to the step 4.
And III, if the actual bending angle is smaller than the target bending angle, sending an angle abnormity alarm, and turning to the step 4.
Similarly, when the actual bending angle and the target bending angle are compared, and when the absolute bending angle-the target bending angle is less than or equal to the allowable difference value of the bending angle, the control system determines that the actual bending angle is equal to the target bending angle.
The allowable difference value of the bending angle is 0.2-0.5 degrees, namely the error between the final bending angle of the plate and the bending target angle is +/-0.2- +/-0.5 degrees, and the allowable difference value of the bending angle can be determined according to the processing requirements of customers, and is preferably 0.3 degrees.
Step 3.3: and (3) controlling the bending machine by the control system, detecting and calculating compensation stroke data of the plate by the angle correction system, feeding the compensation stroke data back to the control system, and returning to the step 3.1.
The detection and calculation method of the compensation stroke data of the plate comprises the following steps:
step S1: the angle correction system detects the angle before springback of the plate before release and the angle after springback of the plate after complete release. The angle correction system can detect the bending angle of the plate in real time or periodically in the release process of the plate, compares the currently detected bending angle value with the last bending angle value, reserves the larger bending angle value, and takes the detected maximum value of the bending angle as the rebound angle.
The angle correction system adopts prior art's laser emitter, high definition digtal camera etc. detects the angle of bending of panel, a pair of laser emitter and high definition digtal camera are at the underbeam both sides symmetrical arrangement of bender, a pair of laser emitter is respectively to two face transmission laser beams of bending of panel, and gather the image of two bundles of laser beams that correspond through the high definition digtal camera of side, confirm the contained angle of the laser beam of panel both sides according to two laser beam images at the same moment, this contained angle is the angle of bending of panel at this moment promptly. The angle correction system may also adopt other devices or methods to perform real-time detection of the plate angle, which is not described herein again.
Step S2: the angle correction system calculates the rebound angle according to the rebound front angle and the rebound rear angle, and the calculation formula is as follows: the rebound angle is the angle after rebound-the angle before rebound.
Step S3: and calculating compensation stroke data of the upper beam of the bending machine during the next bending according to the springback angle, namely stroke data of the upper beam of the bending machine which needs to be moved downwards more during the next bending so as to meet the bending compensation of the plate. The compensation stroke data corresponding to the springback angle is calculated by a calculation module in a control system of the bending machine, the calculation process is determined according to the performance of the bending machine and the characteristics of the plate, various factors which may influence the bending precision, such as the performance reduction rate of the bending machine, the elastic coefficient of the plate and the like, can be taken into consideration, and compared with a compensation mode of directly setting a compensation angle value through manual measurement in the prior art, the compensation method has higher precision and adaptability.
And 4, step 4: and controlling the return stroke of the bending machine by the control system, and finishing the bending angle correction.
Example 1:
the width of the V-shaped opening of the lower die of the bending machine adopted in the embodiment is 100mm, and the angle of the V-shaped opening is 78 degrees. Setting plate parameters through a control system of the bending machine: the length of the plate is 1200mm, the thickness is 7mm, the material is an iron plate, the allowable difference value of the bending angle is set to be 0.3 degrees, the bending target angle of the plate is set to be 135 degrees, and the pre-bending set angle is 138 degrees.
The control system controls the bending machine to pre-bend the plate, and the angle correction system detects that the pre-bending actual angle of the plate is 136.1 degrees under the condition that the die on the bending machine compresses the plate, namely the rebound angle before pre-bending release. The control system controls the bending machine to release the plate, after the bending machine has no pressure on the plate, the angle correction system detects that the rebound angle of the plate after the plate is completely released is 139.7 degrees, the rebound angle of the plate is 3.6 degrees, the compensation stroke data needing to be moved more when the upper beam of the bending machine is bent next time is calculated to be 3.81mm, and the data are fed back to the control system.
The control system controls the bending machine to perform compensation bending, namely, compensation stroke data of 3.81mm is added to stroke data of upper beam walking of the bending machine, then bending is performed again, and after bending, the bending angle of the plate is detected through the angle correction system, namely, the angle before rebounding of the plate before releasing is 132.2 degrees. The control system controls the bending machine to release the plate, and after the bending machine has no pressure on the plate, the angle correction system detects that the rebounded angle of the completely released plate is 135.1 degrees, is larger than the bending target angle by 135 degrees, has an error of 0.1 degree, and is smaller than the bending angle by an allowed difference value of 0.3 degrees.
The control system judges that the bending angle is qualified, the bending machine system controls the return stroke of the bending machine, and the bending angle correction is finished.
Example 2:
the width of the V-shaped opening of the lower die of the bending machine adopted in the embodiment is 100mm, and the angle of the V-shaped opening is 78 degrees. Setting plate parameters through a control system of the bending machine: the length of the plate is 1200mm, the thickness is 7mm, the material is an iron plate, the allowable difference value of the bending angle is set to be 0.3 degrees, the bending target angle of the plate is set to be 135 degrees, and the pre-bending set angle is 138 degrees.
The control system controls the bending machine to pre-bend the plate, and the angle correction system detects that the pre-bending actual angle of the plate is 136.3 degrees under the state that the die on the bending machine compresses the plate, namely the rebound angle before pre-bending release. The control system controls the bending machine to release the plate, after the bending machine has no pressure on the plate, the angle correction system detects that the rebound angle of the plate after the plate is completely released is 139.5 degrees, the rebound angle of the plate is 3.2 degrees, the compensation stroke data which needs to be moved more when the upper beam of the bending machine is bent next time is calculated to be 3.425mm, and the data is fed back to the control system.
The control system controls the bending machine to perform compensation bending, namely compensation stroke data 3.425mm is added to stroke data of upper beam walking of the bending machine, then bending is performed again, and after bending, the bending angle of the plate is detected through the angle correction system, namely the angle before rebounding of the plate before releasing is 133.1 degrees. The control system controls the bending machine to release the plate, after the bending machine has no pressure on the plate, the angle correction system detects that the rebounded angle of the completely released plate is 135.9 degrees, the error of the rebounded angle with the bending target angle of 135 degrees is 0.9 degrees, the allowable difference value exceeding the bending angle is 0.3 degrees, and secondary compensation bending needs to be executed. The angle correction system calculates the rebound angle to be 2.8 degrees, calculates the compensation stroke data which needs to be moved more when the upper beam of the bending machine is bent next time to be 1.75mm and feeds back the data to the control system.
The control system controls the bending machine to perform compensation bending, namely, compensation stroke data of 1.75mm is added to stroke data of upper beam walking of the bending machine, then bending is performed again, and after bending, the bending angle of the plate is detected through the angle correction system, namely, the angle before rebounding of the plate before releasing is 132.5 degrees. The control system controls the bending machine to release the plate, after the bending machine has no pressure on the plate, the angle correction system detects that the rebounded angle of the completely released plate is 134.9 degrees, is smaller than the bending target angle of 135 degrees and has an error of 0.1 degree, and is smaller than the bending angle and allows the difference value of 0.3 degrees.
The control system judges that the bending angle is qualified, the bending machine system controls the return stroke of the bending machine, and the bending angle correction is finished.
Example 3:
the width of the V-shaped opening of the lower die of the bending machine adopted in the embodiment is 100mm, and the angle of the V-shaped opening is 78 degrees. Setting plate parameters through a control system of the bending machine: the length of the plate is 1200mm, the thickness is 7mm, the material is an iron plate, the allowable difference value of the bending angle is set to be 0.3 degrees, the bending target angle of the plate is set to be 135 degrees, and the pre-bending set angle is 138 degrees.
The control system controls the bending machine to pre-bend the plate, and the angle correction system detects that the pre-bending actual angle of the plate is 136.4 degrees in the state that the die on the bending machine compresses the plate, namely the rebound angle before pre-bending release. The control system controls the bending machine to release the plate, after the bending machine has no pressure on the plate, the angle correction system detects that the rebound angle of the plate after the plate is completely released is 139.9 degrees, the rebound angle of the plate is 3.5 degrees, the compensation stroke data needing to be moved more when the upper beam of the bending machine is bent next time is calculated to be 3.08mm, and the data are fed back to the control system.
The control system controls the bending machine to perform compensation bending, namely, compensation stroke data of 3.08mm is added into stroke data of upper beam walking of the bending machine, then bending is performed again, and after bending, the bending angle of the plate is detected through the angle correction system, namely, the angle before rebounding of the plate before releasing is 133.8 degrees. The control system controls the bending machine to release the plate, after the bending machine has no pressure on the plate, the angle correction system detects that the rebounded angle of the completely released plate is 136.4 degrees, the error of the rebounded angle with the bending target angle of 135 degrees is 1.4 degrees, the allowable difference value exceeding the bending angle is 0.3 degrees, and secondary compensation bending needs to be performed. The angle correction system calculates that the springback angle is 2.6 degrees, calculates that the compensation stroke data which needs to be moved more when the upper beam of the bending machine bends next time is 2.315mm, and feeds back the data to the control system.
The control system controls the bending machine to perform compensation bending, namely compensation stroke data 2.315mm is added to stroke data of upper beam walking of the bending machine, then bending is performed again, and after bending, the bending angle of the plate is detected through the angle correction system, namely the angle before rebounding before the plate is released again is 131.9 degrees. The control system controls the bending machine to release the plate, after the bending machine has no pressure on the plate, the angle correction system detects that the rebounded angle of the completely released plate is 134.2 degrees, is smaller than the bending target angle by 135 degrees and has an error of 0.8 degrees, and the allowable difference value of exceeding the bending angle is 0.3 degrees.
And the control system judges that the bending angle is unqualified and sends out an angle abnormity alarm, the bending machine system controls the return stroke of the bending machine, and the bending angle correction is finished.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a method of angle correction of bending for bender, characterized by: the method comprises the following steps:
step 1: an angle correction system of the bending machine sends a pre-bending angle signal to a control system;
step 2: the control system controls the bending machine to pre-bend the plate and calculates compensation stroke data;
and step 3: the control system controls the bending machine to perform compensation bending on the plate;
the specific steps of the compensation bending of the plate are as follows:
step 3.1: the control system controls the bending machine to perform bending action according to the compensation stroke data, releases the compensated bent plate and detects the bending actual angle of the plate through the angle correction system, namely the rebounded angle of the plate after the plate is released again;
step 3.2: the angle correction system feeds back the detected actual bending angle to the control system, and the control system compares the actual bending angle with the bending target angle:
I. if the actual bending angle is smaller than the target bending angle, executing the step 3.3;
II. If the actual bending angle is equal to the target bending angle, the plate bending process is finished, and the step 4 is carried out;
III, if the actual bending angle is smaller than the target bending angle, sending an angle abnormity alarm, and turning to the step 4;
step 3.3: the angle correction system detects and calculates the compensation stroke data of the plate, feeds the data back to the control system, and returns to the step 3.1;
and 4, step 4: and controlling the return stroke of the bending machine by the control system, and finishing the bending angle correction.
2. The bending angle correction method for bending machines according to claim 1, characterized in that: in the step 1, the pre-bending angle signal includes a pre-bending set angle, and the pre-bending angle set value is greater than the bending target angle.
3. The bending angle correction method for bending machines according to claim 2, characterized in that: the pre-bending set angle is 2-5 degrees larger than the bending target angle.
4. The bending angle correction method for bending machines according to claim 1, characterized in that: in the step 2, the specific steps of pre-bending the plate are as follows:
step 2.1: the control system controls the bending machine to perform pre-bending action on the plate according to the pre-bending angle signal and the bending target angle, releases the pre-bent plate and detects the pre-bending actual angle of the plate through the angle correction system, namely the rebounded angle of the plate after the plate is released;
step 2.2: the angle correction system feeds the detected pre-bending actual angle back to the control system, and the control system compares the pre-bending actual angle with the bending target angle:
I. if the actual pre-bending angle is larger than the target bending angle, executing the step 2.3;
II. If the pre-bending actual angle is equal to the bending target angle, the plate bending process is finished, and the step 4 is carried out;
III, if the actual pre-bending angle is smaller than the target bending angle, sending an angle abnormity alarm, and turning to the step 4;
step 2.3: the angle correction system detects and calculates the compensation stroke data of the plate and feeds the data back to the control system.
5. The bending angle correction method for bending machines according to claim 1 or 4, characterized in that: the detection and calculation method of the compensation stroke data of the plate comprises the following steps:
step S1: the angle correction system detects the angle before rebounding of the plate before releasing and the angle after rebounding of the plate after completely releasing;
step S2: the angle correction system calculates the rebound angle according to the rebound front angle and the rebound rear angle, and the calculation formula is as follows: the rebound angle is the angle after rebound-the angle before rebound;
step S3: and calculating the compensation stroke data of the upper beam of the bending machine during the next bending according to the springback angle.
6. The bending angle correction method for bending machines according to claim 4, wherein: in the step 2.2, when the pre-bending actual angle and the bending target angle are compared, the difference between the bending angles is set by the control system, and when the absolute value of the pre-bending actual angle-the bending target angle is less than or equal to the absolute value of the difference between the bending angles, the control system judges that the pre-bending actual angle is equal to the bending target angle.
7. The bending angle correction method for bending machines according to claim 1, characterized in that: in the step 3.2, when the actual bending angle is compared with the target bending angle, the difference between the bending angles is set by the control system, and when the absolute bending angle-the target bending angle is less than or equal to the absolute bending angle, the control system determines that the actual bending angle is equal to the target bending angle.
8. The bending angle correction method for bending machines according to claim 6 or 7, characterized in that: the allowable difference value of the bending angle is 0.3 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011439264.9A CN112718942B (en) | 2020-12-08 | 2020-12-08 | Bending angle correction method for bending machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011439264.9A CN112718942B (en) | 2020-12-08 | 2020-12-08 | Bending angle correction method for bending machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112718942A true CN112718942A (en) | 2021-04-30 |
| CN112718942B CN112718942B (en) | 2023-05-12 |
Family
ID=75598962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011439264.9A Active CN112718942B (en) | 2020-12-08 | 2020-12-08 | Bending angle correction method for bending machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112718942B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115338288A (en) * | 2022-10-18 | 2022-11-15 | 南通康海机床有限公司 | Intelligent control system of numerical control bending machine |
| CN117584526A (en) * | 2024-01-18 | 2024-02-23 | 维亘精密机械(苏州)有限公司 | Stamping die and rebound compensation method |
| CN118357317A (en) * | 2024-06-20 | 2024-07-19 | 上海兴源东安电气设备制造有限公司 | Control method of bending equipment, electronic equipment and bending angle detection system |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5007264A (en) * | 1987-11-19 | 1991-04-16 | Feintool International Holding | Method and apparatus for the bending of workpieces |
| CN1259889A (en) * | 1997-06-20 | 2000-07-12 | 卢恰诺·加斯帕里尼 | Machine for press-bending metal sheet |
| US20030000268A1 (en) * | 2000-01-17 | 2003-01-02 | Hitoshi Omata | Sheet thickness detecting method and device therefor in bending machine, reference inter-blade distance detecting method and device therefor, and bending method and bending device |
| US20070186602A1 (en) * | 2004-02-18 | 2007-08-16 | Giovanni Cella | Process and pneumatic device for detecting the bending angle of a plate sheet in a bending press |
| CN201755607U (en) * | 2010-07-23 | 2011-03-09 | 杭州捷塔科技有限公司 | On-line detecting and compensating device used in bend pipe processing |
| CN102240703A (en) * | 2011-04-21 | 2011-11-16 | 中国电子科技集团公司第十四研究所 | Non-contact dieless processing forming angle measuring method |
| CN103575238A (en) * | 2013-10-10 | 2014-02-12 | 西安交通大学 | Angle detection device used for bending machine |
| CN105251823A (en) * | 2015-09-17 | 2016-01-20 | 中国石油天然气集团公司 | Automatic control system and method for vertical hydraulic cold steel pipe machine |
| CN105880332A (en) * | 2015-01-26 | 2016-08-24 | 上海宝钢高新技术零部件有限公司 | Hydraulic hollow tube springback control method and device |
| CN205701948U (en) * | 2016-06-02 | 2016-11-23 | 广州大学 | There is automatization's bender of visualization function |
| CN106599517A (en) * | 2016-12-30 | 2017-04-26 | 南京埃斯顿自动化股份有限公司 | Correction method for bending angle and sliding block depth based on technologic database |
| CN108435856A (en) * | 2018-04-13 | 2018-08-24 | 吉林长光启元自动化控制有限公司 | Slider of bender location compensation method, system, equipment and digital control system |
| CN109248940A (en) * | 2018-08-27 | 2019-01-22 | 宁波欣达（集团）有限公司 | The bending method of automatic integrated system and application automatic integrated system |
| CN109482671A (en) * | 2018-11-13 | 2019-03-19 | 郑丽丽 | A kind of bending plate angle detection device |
| CN210586544U (en) * | 2019-08-06 | 2020-05-22 | 江阴市宏业机械制造有限公司 | Pipe bending machine capable of automatically detecting and memorizing compensation rebound angle |
-
2020
- 2020-12-08 CN CN202011439264.9A patent/CN112718942B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5007264A (en) * | 1987-11-19 | 1991-04-16 | Feintool International Holding | Method and apparatus for the bending of workpieces |
| CN1259889A (en) * | 1997-06-20 | 2000-07-12 | 卢恰诺·加斯帕里尼 | Machine for press-bending metal sheet |
| US20030000268A1 (en) * | 2000-01-17 | 2003-01-02 | Hitoshi Omata | Sheet thickness detecting method and device therefor in bending machine, reference inter-blade distance detecting method and device therefor, and bending method and bending device |
| US20070186602A1 (en) * | 2004-02-18 | 2007-08-16 | Giovanni Cella | Process and pneumatic device for detecting the bending angle of a plate sheet in a bending press |
| CN201755607U (en) * | 2010-07-23 | 2011-03-09 | 杭州捷塔科技有限公司 | On-line detecting and compensating device used in bend pipe processing |
| CN102240703A (en) * | 2011-04-21 | 2011-11-16 | 中国电子科技集团公司第十四研究所 | Non-contact dieless processing forming angle measuring method |
| CN103575238A (en) * | 2013-10-10 | 2014-02-12 | 西安交通大学 | Angle detection device used for bending machine |
| CN105880332A (en) * | 2015-01-26 | 2016-08-24 | 上海宝钢高新技术零部件有限公司 | Hydraulic hollow tube springback control method and device |
| CN105251823A (en) * | 2015-09-17 | 2016-01-20 | 中国石油天然气集团公司 | Automatic control system and method for vertical hydraulic cold steel pipe machine |
| CN205701948U (en) * | 2016-06-02 | 2016-11-23 | 广州大学 | There is automatization's bender of visualization function |
| CN106599517A (en) * | 2016-12-30 | 2017-04-26 | 南京埃斯顿自动化股份有限公司 | Correction method for bending angle and sliding block depth based on technologic database |
| CN108435856A (en) * | 2018-04-13 | 2018-08-24 | 吉林长光启元自动化控制有限公司 | Slider of bender location compensation method, system, equipment and digital control system |
| CN109248940A (en) * | 2018-08-27 | 2019-01-22 | 宁波欣达（集团）有限公司 | The bending method of automatic integrated system and application automatic integrated system |
| CN109482671A (en) * | 2018-11-13 | 2019-03-19 | 郑丽丽 | A kind of bending plate angle detection device |
| CN210586544U (en) * | 2019-08-06 | 2020-05-22 | 江阴市宏业机械制造有限公司 | Pipe bending machine capable of automatically detecting and memorizing compensation rebound angle |
Non-Patent Citations (1)
| Title |
|---|
| 王书易等: "基于立体视觉的折弯角度测量系统的研究", 《自动化技术与应用》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115338288A (en) * | 2022-10-18 | 2022-11-15 | 南通康海机床有限公司 | Intelligent control system of numerical control bending machine |
| CN115338288B (en) * | 2022-10-18 | 2023-12-01 | 广州市珠江机床厂有限公司 | Intelligent control system of numerical control bending machine |
| CN117584526A (en) * | 2024-01-18 | 2024-02-23 | 维亘精密机械(苏州)有限公司 | Stamping die and rebound compensation method |
| CN117584526B (en) * | 2024-01-18 | 2024-04-26 | 维亘精密机械(苏州)有限公司 | Stamping die and rebound compensation method |
| CN118357317A (en) * | 2024-06-20 | 2024-07-19 | 上海兴源东安电气设备制造有限公司 | Control method of bending equipment, electronic equipment and bending angle detection system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112718942B (en) | 2023-05-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112718942A (en) | Bending angle correction method for bending machine | |
| CN110076241B (en) | Bending resilience intelligent compensation device, progressive die and bending resilience compensation method | |
| CN107138944B (en) | The two workpiece automatic aligning methods based on spatial point error correction | |
| CN201755607U (en) | On-line detecting and compensating device used in bend pipe processing | |
| CN109590357B (en) | Metal plate bending method and terminal | |
| CN101898211A (en) | On-line detection and compensation system applied to bend processing | |
| JPH02142620A (en) | Method of bending sheet piece at fixed angle of bending | |
| CN108941321B (en) | Method for manufacturing stamping die of beam parts | |
| CN106599517B (en) | A kind of bearing calibration of bending angle based on technological data bank and sliding block depth | |
| CN113399856A (en) | CCD (Charge coupled device) alignment pulse hot-press welding system and welding method | |
| CN112388265B (en) | Flexible clamping, measuring and positioning device for radiation unit | |
| CN104014613B (en) | A kind of non-contact laser on-line checking bar linearity mechanism and detection method | |
| EP1638710A1 (en) | System for metering the bending angle in a machine for bending metallic sheets and/or sections, as well as method and machine for bending metallic sheets and/or sections using such system | |
| CN118397105A (en) | Positioning calibration teaching method and system based on machine vision traversal | |
| CN110576084B (en) | Bending machine deflection compensation amount control device based on pressure adjustment and adjusting method thereof | |
| CN110102607A (en) | JCO steel pipe forming tune type technique | |
| CN116689567B (en) | Intelligent bent pipe control system and control method for bent pipe orthopaedics | |
| CN117620672A (en) | Method for improving equipment docking precision through dynamic adjustment and compensation | |
| CN115921594B (en) | 500 ton-level automatic intelligent shape correction equipment | |
| CN116619046B (en) | Cabinet sheet metal forming machine based on stainless steel case | |
| CN111151602A (en) | Robot bending system and method with fault-tolerant function | |
| CN111069359A (en) | Speed planning method applied to bending synchronous following of bending robot | |
| CN115237056B (en) | Multi-tool rapid deviation rectifying method for industrial robot | |
| CN213561290U (en) | Digit control machine tool machining precision compensation mechanism | |
| JP3072875B2 (en) | Method and apparatus for correcting a workpiece having a complicated shape |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Bending angle correction method for bending machine Granted publication date: 20230512 Pledgee: Bank of China Limited Dongtai Branch Pledgor: Jiangsu Hongdong Industrial Automation Co.,Ltd. Registration number: Y2024980027853 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |