CN110695134B - Unbalanced load assessment method using unbalanced load online measurement device oriented to fine blanking progressive die - Google Patents
Unbalanced load assessment method using unbalanced load online measurement device oriented to fine blanking progressive die Download PDFInfo
- Publication number
- CN110695134B CN110695134B CN201911029046.5A CN201911029046A CN110695134B CN 110695134 B CN110695134 B CN 110695134B CN 201911029046 A CN201911029046 A CN 201911029046A CN 110695134 B CN110695134 B CN 110695134B
- Authority
- CN
- China
- Prior art keywords
- gravity sensor
- unbalanced load
- die
- fine blanking
- computer
- 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.)
- Active
Links
- 230000000750 progressive effect Effects 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000005259 measurement Methods 0.000 title claims description 10
- 230000005484 gravity Effects 0.000 claims abstract description 48
- 238000007599 discharging Methods 0.000 claims abstract description 26
- 238000003825 pressing Methods 0.000 claims abstract description 24
- 230000001133 acceleration Effects 0.000 claims description 42
- 238000004080 punching Methods 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000007723 die pressing method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Punching Or Piercing (AREA)
Abstract
The invention relates to a unbalanced load assessment method using an unbalanced load on-line measuring device facing a fine blanking progressive die, which solves the technical problem that an existing unbalanced load detecting device of the fine blanking progressive die cannot monitor in real time and comprises a feeding end gravity sensor, a discharging end gravity sensor, a data acquisition card and a computer, wherein the output end of the feeding end gravity sensor is connected with the data acquisition card through a signal wire, the output end of the discharging end gravity sensor is connected with the data acquisition card through the signal wire, and the data acquisition card is connected with the computer; the feeding end gravity sensor is configured to be connected to the left side of the pressing plate of the fine blanking progressive die, and the discharging end gravity sensor is configured to be connected to the right side of the pressing plate of the fine blanking progressive die. The invention is widely applied to the technical field of plastic forming dies.
Description
Technical Field
The invention relates to a measurement technology oriented to the field of plastic forming dies, in particular to a unbalanced load assessment method using an unbalanced load on-line measurement device oriented to a fine blanking progressive die.
Background
Along with the continuous popularization of the fine blanking technology, the fine blanking progressive die is increasingly widely applied to the manufacturing of precision parts. Compared with the traditional stamping progressive die, the fine stamping progressive die is subjected to the combined action of blanking force, blank pressing force and anti-jacking force in the working process. In addition, the clearance between the male die and the female die and the matching precision of all die parts are more severe than those of the traditional stamping progressive die. In the forming process, uneven gaps between the male die and the female die can be caused by unbalanced load, and the forming quality of the part is affected. In severe cases, even the male die collides or the male die breaks, thereby affecting the service life of the die. Aiming at the problem of unbalanced load of a multi-station fine blanking progressive die, the method for accurately calculating the die pressure center and optimizing the step layout of each station can be utilized to avoid large unbalanced load as far as possible, but the fluctuation of the performance of materials and the change of service environment can cause the instability of the forming process and the uncertainty of the unbalanced load degree.
The invention application of patent application number 201811068443.9 discloses a method for detecting unbalanced load of a multi-station press, which compares the calculated total punching force and total eccentric position of a die with an unbalanced load capacity curve of the pre-input multi-station press to detect the unbalanced load condition of the press so as to avoid damage to a slide guide and potential safety hazards. The invention patent number 201710693878.1 discloses an immediate unbalanced load device, which realizes unbalanced load response by adding a driving cylinder corresponding to a station, so that the stress center and the pressure center of a multi-station fine blanking die are overlapped, and the problems of damaged unbalanced load of the die and poor processing quality of parts are avoided. The invention patent number 201510409723.1 discloses a unbalanced load active balance fine blanking die structure, wherein a pressing plate is separated according to the number of stations and is controlled by an independent hydraulic cylinder, so that unbalanced load in the fine blanking process is balanced actively.
In summary, the above technical solutions mostly use an independent cylinder or a driving cylinder dedicated to a station to actively seek balance, or directly judge whether there is a potential safety hazard of unbalanced load from the level of the press, and do not monitor the unbalanced load from the real-time production perspective. From the production practice of factories, the unbalanced load condition in the production process is changed instantaneously, and the service life of the die is seriously influenced. Therefore, it is necessary to monitor and evaluate the unbalanced load condition of the fine blanking progressive die in real time in the actual working process, and provide references for die design and subsequent measures for balancing the unbalanced load.
Disclosure of Invention
The invention provides a unbalanced load assessment method by using an unbalanced load online measurement device oriented to a fine blanking progressive die, aiming at solving the technical problem that an existing unbalanced load detection device of the fine blanking progressive die cannot monitor in real time.
The basic principle of the invention is that gravity sensors arranged at the feeding end and the discharging end of a fine blanking progressive die pressing plate are utilized to measure acceleration change curves at two sides of the feeding end and the discharging end of the die; then the measured acceleration signals are transmitted to a computer by utilizing a data acquisition card, and the difference of signals at the two sides of the feeding end and the discharging end of the fine blanking progressive die can be judged by combining signal processing; when the signal deviation value exceeds the set threshold, the deviation load is too serious. At this time, the production should be stopped as soon as possible, and the balance adjustment of the mold should be performed.
The invention provides an unbalanced load on-line measuring device for a fine blanking progressive die, which comprises a feeding end gravity sensor, a discharging end gravity sensor, a data acquisition card and a computer, wherein the output end of the feeding end gravity sensor is connected with the data acquisition card through a signal wire; the feeding end gravity sensor is configured to be connected to the left side of the pressing plate of the fine blanking progressive die, and the discharging end gravity sensor is configured to be connected to the right side of the pressing plate of the fine blanking progressive die.
The invention also provides a unbalanced load assessment method applying the unbalanced load online measurement device facing the fine blanking progressive die, which comprises the following steps:
step 1, a critical deviation value delta set by a computer c ；
Step 2, feeding back an acceleration signal to a computer by a gravity sensor at a feeding end and feeding back the acceleration signal to the computer by the gravity sensor at a discharging end in the fine blanking progressive die working process;
step 3, the computer generates a curve (1) and a curve (2) according to the received acceleration signals;
step 4, the computer calculates the deviation value delta=b 1 -a 1 ，a 1 Representing the acceleration value of curve (1), b 1 An acceleration value representing a curve (2);
step 5, the computer compares the deviation value delta with the critical deviation value delta c Comparison is made when delta>Δ c And when the unbalanced load is judged to be too large, the production is reminded to be stopped in time, and the balance adjustment is carried out on the die.
Preferably, in step 1, Δ c The specific determination process is as follows:
(1) Placing strips at the punching step, blanking in an idle station state, and closing the die to finish the fine blanking forming process; acquiring acceleration signal curves of a gravity sensor at a feeding end and a gravity sensor at a discharging end by using a data acquisition card, calculating acceleration deviation values at any moment based on curve interpolation, and recording the maximum acceleration deviation value delta 1 ；
(2) Placing a strip at the blanking step, wherein the punching step is in an idle station state, and closing the die to finish the fine blanking forming process; obtaining a pressing plate by using a data acquisition cardAcceleration signal curves of the gravity sensors at two sides, calculating acceleration deviation values at any moment based on curve interpolation, and recording maximum acceleration deviation values delta 2 ；
(3) Calculating critical deviation delta c ＝|Δ 1 -Δ 2 |。
The method has the beneficial effects that the method can realize the real-time measurement of the unbalanced load of the fine blanking progressive die, and effectively and accurately provide reference for the die design and the follow-up measures of balanced unbalanced load. And dynamically judging acceleration signal deviation values of gravity sensors arranged at the feeding end and the discharging end, judging the severity of the unbalanced load state of the die according to the magnitude of the signal deviation, and determining whether to add a balance weight to improve the unbalanced load degree of the die.
Further features of the invention will be apparent from the description of the embodiments that follows.
Drawings
FIG. 1 is a schematic diagram of a fine blanking progressive die comprising two steps of punching and blanking;
FIG. 2 is a schematic diagram of the construction and installation of an off-load on-line measurement device;
in fig. 3, the acceleration curve of the gravity sensors installed at the feeding end and the discharging end in the ideal case is shown in fig. 3 (a), and the acceleration curve of the gravity sensors installed at the die in the unbalanced load case is shown in fig. b.
The symbols in the drawings illustrate:
1. the die comprises an upper die holder, a guide post, a pressing plate fixing plate, a female die, a guide sleeve, a lower die holder, a dowel bar, a counter-jacking device, a female die backing plate, a counter-jacking device, the blanking die comprises a die body, a die pressing plate, a punching die, a blank holder dowel bar, a die backing plate, an inner hole positioning die, a blanking die and a die fixing plate. 20. The feeding end gravity sensor, the discharging end gravity sensor, the data acquisition card, the signal wire and the computer are respectively arranged at the feeding end and the discharging end, the data acquisition card, the signal wire and the computer are respectively arranged at the feeding end and the discharging end, and the arrow direction in the figure 2 is the moving direction of the strip.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the fine blanking progressive die comprising two steps of punching and blanking comprises an upper die holder 1, a guide post 2, a pressing plate fixing plate 3, a die 4, a guide sleeve 5, a lower die holder 6, a dowel bar 7, a dowel bar 8, a counter-ejector 9, a die backing plate 10, a counter-ejector 11, a pressing plate 13, a punching punch 14, a blank holder dowel bar 15, a punch backing plate 16, an inner hole positioning punch 17, a blanking punch 18 and a punch fixing plate 19. The left side of fig. 1 is the strip feed end and the right side is the discharge end. The fine blanking progressive die comprises two working steps of punching and blanking, wherein the working stations are sequentially associated to finish different processing steps, and a series of forming operations of the working stations are finished in one stroke of a fine blanking press.
As shown in fig. 2, the offset load online measurement device facing the fine blanking progressive die comprises a feeding end gravity sensor 20, a discharging end gravity sensor 21, a data acquisition card 22, a signal wire 23, a signal wire 24 and a computer 25, wherein the feeding end gravity sensor 20 is fixedly arranged on the left side of the pressing plate 13, the discharging end gravity sensor 21 is fixedly arranged on the right side of the pressing plate 13, the output end of the feeding end gravity sensor 20 is connected with the data acquisition card 22 through the signal wire 23, the output end of the discharging end gravity sensor 21 is connected with the data acquisition card 22 through the signal wire 24, and the data acquisition card 22 is connected with the computer 25. In the working process of the material pressing plate 13, acceleration signals of the feeding end gravity sensor 20 and the discharging end gravity sensor 21, which change along with time, are read by utilizing the data acquisition card 22, and are transmitted to the computer 25, so that two acceleration signal curves can be generated by signal processing software in a coordinate axis taking acceleration as an ordinate and time as an abscissa.
After the fine blanking progressive die is closed, the strip at the first station forms a punching operation under the combined action of the punching male die 14, the pressing plate 13, the female die 4 and the counter-ejector 9, at this time, the pressing plate 13 moves upwards, and at the same time, the strip at the second station forms a blanking operation under the combined action of the blanking male die 18, the inner hole positioning male die 17, the pressing plate 13, the female die 4 and the counter-ejector 11. Likewise, the platen 13 moves upward. Under ideal unbalanced load conditions, the acceleration signal curves (1) and (2) given by the feeding end gravity sensor 20 and the discharging end gravity sensor 21 arranged on two sides of the pressing plate 13 should be completely overlapped, as shown in fig. 3 (a).
For the fine blanking progressive die, the upward moving accelerations at the two sides of the pressing plate 13 are different due to the forces required for punching and blanking, and the acceleration signal curves of the gravity sensors at the two sides of the pressing plate obtained through collection are displayed and acquired by the computer at the moment, as shown in fig. 3 (b), in the diagram, the curve (1) corresponds to the acceleration signal curve of the gravity sensor 20 at the feeding end, and the curve (2) corresponds to the acceleration signal curve of the gravity sensor 21 at the discharging end. As can be seen from the figure, from t 0 Starting at the moment, the two curves start to deviate. Let t be 1 The moment is the current moment, and the acceleration value of the curve (1) corresponding to the moment is a 1 The acceleration value of curve (2) is b 1 Then the computer calculates t 1 Deviation value delta=b of time 1 -a 1 Will t 1 The deviation value delta of time and the critical deviation value delta initially set by the computer c Comparison is made when delta>Δ c When the method is used, the unbalanced load is judged to be serious, the production is reminded to be stopped in time, and an operator improves the unbalanced load condition of the die by adding the balance weight.
Critical deviation delta for computer settings c The method is determined according to the test die condition, and specifically comprises the following steps of:
step 1, placing strips at the punching step, wherein the blanking step is in an idle station state, and closing a die to finish the fine blanking forming process; acquiring acceleration signal curves of gravity sensors at two sides of a pressing plate by using a data acquisition card, calculating acceleration deviation values at any moment based on curve interpolation, and recording maximum acceleration deviation values delta 1 ；
Step 2, placing a strip at the blanking step, wherein the punching step is in an idle station state, and closing the die to finish the fine blanking forming process; acquiring acceleration signal curves of gravity sensors at two sides of a pressing plate by using a data acquisition card, calculating acceleration deviation values at any moment based on curve interpolation, and recording maximum acceleration deviation values delta 2 ；
Step 3, calculating the critical deviation value delta c ＝|Δ 1 -Δ 2 |。
The invention and its embodiments have been described above by way of illustration and not limitation, and the invention is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one skilled in the art is informed by this disclosure, other configurations of parts, driving devices and connection modes are adopted without creatively designing similar structures and embodiments without departing from the spirit of the present invention, and the present invention shall not be limited by the scope of the present invention.
Claims (1)
1. The unbalanced load assessment method is characterized in that the unbalanced load on-line measurement device for the fine blanking progressive die comprises a feeding end gravity sensor, a discharging end gravity sensor, a data acquisition card and a computer, wherein the output end of the feeding end gravity sensor is connected with the data acquisition card through a signal wire, the output end of the discharging end gravity sensor is connected with the data acquisition card through a signal wire, and the data acquisition card is connected with the computer; the feeding end gravity sensor is configured to be connected to the left side of a pressing plate of the fine blanking progressive die, the discharging end gravity sensor is configured to be connected to the right side of the pressing plate of the fine blanking progressive die, and the unbalanced load assessment method comprises the following steps:
step 1, a critical deviation value delta set by a computer c ；Δ c The determination process of (2) is as follows:
(1) Placing strips at the punching step, blanking in an idle station state, and closing the die to finish the fine blanking forming process; acquiring acceleration signal curves of a gravity sensor at a feeding end and a gravity sensor at a discharging end by using a data acquisition card, calculating acceleration deviation values at any moment based on curve interpolation, and recording the maximum acceleration deviation value delta 1 ；
(2) Placing a strip at the blanking step, wherein the punching step is in an idle station state, and closing the die to finish the fine blanking forming process; acquiring acceleration signal curves of gravity sensors at two sides of a pressing plate by using a data acquisition card, and calculating acceleration bias at any moment based on curve interpolationThe difference value is recorded with the maximum acceleration deviation delta 2 ；
(3) Calculating critical deviation delta c ＝|Δ 1 -Δ 2 |；
Step 2, feeding back an acceleration signal to a computer by a gravity sensor at a feeding end and feeding back the acceleration signal to the computer by the gravity sensor at a discharging end in the fine blanking progressive die working process;
step 3, the computer generates a curve (1) and a curve (2) according to the received acceleration signals;
step 4, the computer calculates the deviation value delta=b 1 -a 1 ，a 1 Representing the acceleration value of curve (1), b 1 An acceleration value representing a curve (2);
step 5, the computer compares the deviation value delta with the critical deviation value delta c Comparison is made when delta>Δ c And when the unbalanced load is judged to be too large, the production is reminded to be stopped in time, and the balance adjustment is carried out on the die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911029046.5A CN110695134B (en) | 2019-10-28 | 2019-10-28 | Unbalanced load assessment method using unbalanced load online measurement device oriented to fine blanking progressive die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911029046.5A CN110695134B (en) | 2019-10-28 | 2019-10-28 | Unbalanced load assessment method using unbalanced load online measurement device oriented to fine blanking progressive die |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110695134A CN110695134A (en) | 2020-01-17 |
| CN110695134B true CN110695134B (en) | 2024-03-15 |
Family
ID=69203684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911029046.5A Active CN110695134B (en) | 2019-10-28 | 2019-10-28 | Unbalanced load assessment method using unbalanced load online measurement device oriented to fine blanking progressive die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110695134B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4046040A (en) * | 1976-07-06 | 1977-09-06 | Bourdo Charles A | Progressive die sensor |
| US6487506B1 (en) * | 1999-10-15 | 2002-11-26 | The Minster Machine Company | Thru-stroke tipping moment severity monitor |
| CN101614754A (en) * | 2008-09-04 | 2009-12-30 | 清华大学 | Lorry unbalance loading dynamic testing method and warning system |
| CN202071389U (en) * | 2011-04-27 | 2011-12-14 | 金丰机器工业股份有限公司 | Punch press with function of acceleration detecting |
| CN102489546A (en) * | 2011-12-05 | 2012-06-13 | 湖北汽车工业学院 | Method and system for measuring plastic deformation load |
| CN102520672A (en) * | 2011-12-05 | 2012-06-27 | 湖北汽车工业学院 | Method and system for monitoring plastic deformation process and defects |
| CN103350127A (en) * | 2013-06-28 | 2013-10-16 | 洛阳北川重工机械有限公司 | Deflection analysis method of terminal pieces in multi-step blanking of precision progressive die |
| CN204194530U (en) * | 2014-10-17 | 2015-03-11 | 武汉中航精冲技术有限公司 | With the continuous fine stamping die of billot Self-centering device |
| CN104785574A (en) * | 2015-03-26 | 2015-07-22 | 华南理工大学 | Measuring device and measuring method for measuring high-speed stamping formation force of progressive die |
| CN205904307U (en) * | 2016-07-29 | 2017-01-25 | 天津市久跃科技有限公司 | Multiple detection upgrades mould |
| DE102017204142A1 (en) * | 2017-03-13 | 2018-09-13 | Robert Bosch Gmbh | DEVICE FOR ASSEMBLING AT LEAST ONE COMPONENT AND METHOD FOR MONITORING THE QUALITY OF SUCH A SEALING DEVICE |
| CN110143009A (en) * | 2019-05-21 | 2019-08-20 | 山东省科学院激光研究所 | A kind of press machine multiple spot non-linear prediction control system |
| CN210876833U (en) * | 2019-10-28 | 2020-06-30 | 威海华邦精冲科技股份有限公司 | Offset load on-line measuring device for fine blanking progressive die |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004058471A1 (en) * | 2004-11-24 | 2006-06-08 | Pilz Gmbh & Co. Kg | Safety device for an automated system with at least one automatically movable part of the system |
-
2019
- 2019-10-28 CN CN201911029046.5A patent/CN110695134B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4046040A (en) * | 1976-07-06 | 1977-09-06 | Bourdo Charles A | Progressive die sensor |
| US6487506B1 (en) * | 1999-10-15 | 2002-11-26 | The Minster Machine Company | Thru-stroke tipping moment severity monitor |
| CN101614754A (en) * | 2008-09-04 | 2009-12-30 | 清华大学 | Lorry unbalance loading dynamic testing method and warning system |
| CN202071389U (en) * | 2011-04-27 | 2011-12-14 | 金丰机器工业股份有限公司 | Punch press with function of acceleration detecting |
| CN102489546A (en) * | 2011-12-05 | 2012-06-13 | 湖北汽车工业学院 | Method and system for measuring plastic deformation load |
| CN102520672A (en) * | 2011-12-05 | 2012-06-27 | 湖北汽车工业学院 | Method and system for monitoring plastic deformation process and defects |
| CN103350127A (en) * | 2013-06-28 | 2013-10-16 | 洛阳北川重工机械有限公司 | Deflection analysis method of terminal pieces in multi-step blanking of precision progressive die |
| CN204194530U (en) * | 2014-10-17 | 2015-03-11 | 武汉中航精冲技术有限公司 | With the continuous fine stamping die of billot Self-centering device |
| CN104785574A (en) * | 2015-03-26 | 2015-07-22 | 华南理工大学 | Measuring device and measuring method for measuring high-speed stamping formation force of progressive die |
| CN205904307U (en) * | 2016-07-29 | 2017-01-25 | 天津市久跃科技有限公司 | Multiple detection upgrades mould |
| DE102017204142A1 (en) * | 2017-03-13 | 2018-09-13 | Robert Bosch Gmbh | DEVICE FOR ASSEMBLING AT LEAST ONE COMPONENT AND METHOD FOR MONITORING THE QUALITY OF SUCH A SEALING DEVICE |
| CN110143009A (en) * | 2019-05-21 | 2019-08-20 | 山东省科学院激光研究所 | A kind of press machine multiple spot non-linear prediction control system |
| CN210876833U (en) * | 2019-10-28 | 2020-06-30 | 威海华邦精冲科技股份有限公司 | Offset load on-line measuring device for fine blanking progressive die |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110695134A (en) | 2020-01-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5192830B2 (en) | Online measurement of quality characteristics of punch rivet joining and clinching | |
| KR101139010B1 (en) | Thin plate press molding device and thin plate press molding method | |
| US9089892B2 (en) | Joining method | |
| CN106334726A (en) | Die abnormality prediction system, press machine provided with the same, and die abnormality prediction method | |
| JP7261984B2 (en) | punching equipment | |
| CN103752624B (en) | A kind of hot-strip method for correcting error and system | |
| TWI566061B (en) | The management system of the mold clamping device | |
| CN210876833U (en) | Offset load on-line measuring device for fine blanking progressive die | |
| CN110695134B (en) | Unbalanced load assessment method using unbalanced load online measurement device oriented to fine blanking progressive die | |
| CN104785574B (en) | Measuring device and measuring method for measuring high-speed stamping formation force of progressive die | |
| CN105651640A (en) | Full-automatic detection device of Shore durometer and method thereof | |
| US20030000268A1 (en) | 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 | |
| CN100399038C (en) | Integrated circuit transfer device | |
| CN103163065B (en) | Cold extrusion lubricating effect detecting device and detecting method | |
| CN106077158A (en) | A kind of cold-rolled steel sheet collecting machine, shear system and rewinding method | |
| KR100924100B1 (en) | Tip testing device, measuring method of shear friction factors using the tip testing device and estimating method for lubricant characteristics using the tip testing device | |
| CN205926670U (en) | Cold -rolled steel sheet is received material machine and is cut board system | |
| TW583037B (en) | Slug float detecting device and detection method thereof | |
| CN205786254U (en) | Transmission overload protection arrangement and slide rail frictional force detecting system | |
| CN105333844A (en) | Online rapid measurement apparatus and method for detecting rivet point dimension | |
| KR102559051B1 (en) | Method and Apparatus for Measuring Press Die Parallelism and Press Apparatus Monitoring Method | |
| CN221209442U (en) | Combined mechanism for straightening machine pressing control compensation and roll gap calibration | |
| CN216283231U (en) | Angular deformation measuring device | |
| TWI708644B (en) | Punching device capable of detecting acoustic emission signals and method for detecting punching defects | |
| JP7212260B2 (en) | Quality determination method for thin plate pressed parts, quality determination device for thin plate pressed parts, and press working system |
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 | ||
| CB02 | Change of applicant information |
Country or region after: China Address after: 264500 No.2, Guangzhou road, Rushan Economic Development Zone, Weihai City, Shandong Province Applicant after: Weihai Huabang Precision Industry Co.,Ltd. Address before: 264500 No.2, Guangzhou road, Rushan Economic Development Zone, Weihai City, Shandong Province Applicant before: WEIHAI HUABANG FINEBLANKING CO.,LTD. Country or region before: China |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |