CN107088590A - The punch press feeder and its method of work of a kind of quick identification sheet material skew - Google Patents
The punch press feeder and its method of work of a kind of quick identification sheet material skew Download PDFInfo
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- CN107088590A CN107088590A CN201710422541.7A CN201710422541A CN107088590A CN 107088590 A CN107088590 A CN 107088590A CN 201710422541 A CN201710422541 A CN 201710422541A CN 107088590 A CN107088590 A CN 107088590A
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- sheet material
- feeding roller
- mark point
- video camera
- motion control
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- 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
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/02—Advancing work in relation to the stroke of the die or tool
- B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
- B21D43/08—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by rollers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The present invention relates to a kind of punch press feeder of quick identification sheet material skew and its method of work, including feeding roller, drift, video camera, sheet material Motion Control Platform, drive mechanism, analytical equipment and measuring mechanism；Sheet material Motion Control Platform horizontal is set, and feeding roller horizontal is arranged on sheet material Motion Control Platform, and sheet material is moved along direction of feed between sheet material Motion Control Platform and feeding roller, and mark point is provided with sheet material；Drive mechanism is connected with feeding roller, and feeding roller is used to transport sheet material along direction of feed；Video camera is arranged at the top of sheet material Motion Control Platform, video camera and measuring mechanism are set gradually along direction of feed, the shooting direction of video camera is along Z axis, video camera is used for initial pictures of the shot mark point in camera watch region, analytical equipment is connected with video camera, and analytical equipment is used for the initial Y-axis coordinate according to initial pictures evaluation of markers point；When sheet material enters the stamped area of drift, the actual Y-axis coordinate of measuring mechanism measurement markers point.
Description
Technical field
The invention belongs to Full-automatic punching machine feeder field, more particularly to a kind of punch press of quick identification sheet material skew is sent
Material machine and its method of work.
Background technology
Currently, the various part number of applications by the completion of punch press punch process are huge, and these parts are greatly
It is not only dangerous larger by work such as feeding, discharge and punching press of the manual operations to complete sheet material, and efficiency, quality,
The indexs such as stock utilization are also difficult to ensure that, in addition, for the slightly larger raw material of weight or size（Sheet metal）, only by single
Manpower is difficult to material serving punch press, completes feeding work without suitable feed mechanism again, greatly limit this kind of material
Processing and utilization.
In order to solve this problem, artificial participation is reduced as far as possible, and in the market is proposed automatic feeder for punch successively.It is old
Punch press can retain, it is only necessary to autoloader is added, while in host computer（The control computer of feeder）Read in software
The CAD diagram shape files of workpiece are taken, the discharge of workpiece are carried out in advance, it is possible to common punch press is transformed, self-feeding is realized,
Reach the purpose of " machine substitute human labor ".
At present, in terms of punch press automatic feeder research and development, mainly there are following several types on domestic market：
（1）The feeder of purely mechanic linkage.The feeding of material is controlled by the movement travel of punch press（Or stepping）, the form send
Material machine is simple in construction, with low cost, but the requirement to raw material is strict, it is necessary to be same type of whole plate material, therefore only
It is suitable for the processing of a few regular shape raw material（Such as strip circle strip）.
（2）Semi-automatic auxiliary equipment, the programming of a position is fixed by the actual raw material size obtained, relies on
Simple digital control system carries out a point position stepping, and this equally limits the flexible processing to raw material, is only applicable to specification of the same race, big
The disposable processing of batch raw material.
（3）Using the autoloader of machine vision technique.Using computer, in the sheet material of given shape（It is mostly rectangular
Shape or strip material）Upper progress multiple rule part（It is such as circular, square）And a few irregular shape part is carried out
Permutation and combination and automated programming, so as to realize the automation of whole punching production.
However, the problems such as being limited to machining accuracy, driving sheet material completes the feeding roller of feed motion it is difficult to ensure that in axis
Diameter dimension on direction is completely the same, and therefore, the frictional force of feeding roller is also to be difficult to ensure that completely in the axial direction
Consistent；Secondly, the abrasion condition of feeding roller is also not quite similar during use, so as to cause the frictional force of feeding roller in axis
It is difficult to ensure that on direction completely the same.Therefore, above-mentioned many reasons can cause sheet material that " wandering off " phenomenon occurs during feeding.
Existing Full-automatic feeder, there is the problem of material " wandering off " greatly occurs, so that percent defective increase, material
Utilization rate is reduced, and diel is even damaged sometimes.
For the problem that wanders off of above-mentioned autoloader, the technical measures taken at present are：Feeding roller two ends are adjusted to compress
The thrust of spring, that is, change the thrust between feeding roller and sheet material, so that changing feeding roller is applied to rubbing on sheet material
Power is wiped, the sheet material caused by being compensated with this problems such as feeding roller machining accuracy wanders off phenomenon（The big local sheet material of frictional force
Feed speed is high）.But, the problem of above-mentioned measure is present is：It is adjusted in the pressing force of the spring to each feeding roller two ends
When, due to no convenience, intuitively Adjustment effect detection method and device, can only be by the experience of commissioning staff and debugging after
Punching press testing results repeatedly, therefore not only the technical difficulty of debugging efforts is big, requires high to the technical merit for adjusting personnel, Er Qiehua
Time-consuming length, the wastage of debugging sheet material is big, diel is even damaged sometimes, therefore, either when feeder dispatches from the factory
The examination and test of products stage, or in user using scene, all in the urgent need to detection debugging that is a set of simple and easy to do, having regulations to abide by
Method, is finally reached the purpose for preventing sheet material from wandering off.
The content of the invention
It is an object of the invention to provide the punch press feeding that a kind of convenience, quick identification sheet material that is directly perceived, being easy to implement are offset
Machine and its method of work, can realize that the semi-automatic of exfactory inspection process is examined and debugged, significantly improve inspection and debugging effect
Rate, efficiently solves sheet material in punch press feeder and wanders off the technical problem of detection.
To reach above-mentioned purpose, the invention provides following scheme：A kind of punch press feeder of quick identification sheet material skew,
Including feeding roller and drift, it is characterised in that：Also include video camera, sheet material Motion Control Platform, drive mechanism, analytical equipment and
Measuring mechanism；
Wherein, the sheet material Motion Control Platform horizontal is set, and feeding roller horizontal is arranged on sheet material Motion Control Platform,
Sheet material is moved along direction of feed between sheet material Motion Control Platform and feeding roller, and mark point is provided with sheet material；Drive mechanism
It is connected with feeding roller, feeding roller is used to transport sheet material along direction of feed；
Note horizontal plane is X/Y plane, and the wherein direction of feed of sheet material is X-axis, and the direction vertical with X-axis is Y-axis in X/Y plane, with
The vertical direction of X/Y plane is Z axis；
Video camera is arranged at the top of sheet material Motion Control Platform, and video camera and measuring mechanism set gradually along direction of feed, taken the photograph
The shooting direction of camera is along Z axis, and video camera is used for initial pictures of the shot mark point in camera watch region, analytical equipment and shooting
Machine is connected, and analytical equipment is used for the initial Y-axis coordinate according to initial pictures evaluation of markers point；When sheet material enters the Stamping Area of drift
During domain, the actual Y-axis coordinate of measuring mechanism measurement markers point.
In order to reduce calculation error and measurement error, video camera, sheet material Motion Control Platform and drift are in X/Y plane
Position coordinates is fixed, and video camera is used to shoot the sheet material below drift, and mark point is included in the image that video camera is shot
Positional information.By analytical equipment, such as motion control computer, the position of the mark point of sheet material in the image shot to video camera
Confidence breath is handled and analyzed, and obtains position coordinates of the sheet material mark point along X-axis and Y direction.Because the motion of X-axis is relative
Accurately, only drift condition can just be made and clearly judged by the skew of Y-axis coordinate, while only needing to carry out Y-axis coordinate
Amendment, can just cause sheet material to return on the central axis of sheet material Motion Control Platform, therefore only need to measure the position of Y direction
Coordinate can just meet and be actually needed.
Drift of the present invention is adjacent with measuring mechanism, or, measuring mechanism is arranged in the stamped area of drift.
Video camera of the present invention is adjacent with drift.Video camera is arranged on the top of sheet material, and in installation site permission
In the case of, close proximity to the position of drift.Due to sheet material deviation not all the time in one direction, cause to be possible to actually sending
Deviate very big during material, but the deviation very little that measurement is drawn, in order to reduce measurement error, using this structure, video camera with
Safe distance between drift can make in the cognitive range of those skilled in the art clearly to be judged.
Measuring mechanism of the present invention is Steel Ruler.Actual Y-axis coordinate can be by the steel that is installed in punch press stamped area
Board foot measurement is obtained, and also can be measured acquisition by the instrument of other convenient measurements, thus, be can obtain the physical location of mark point
Coordinate, especially actual Y-axis coordinate.
A kind of method of work of the punch press feeder of quick identification sheet material skew, it is characterised in that：Comprise the following steps：
1）Mark point is made on sheet material；
2）Sheet material is moved in the presence of feeding roller along direction of feed, and mark point initially enters the camera watch region of video camera, shooting
Machine carries out shooting and obtaining initial pictures to mark point, and analytical equipment is according to the initial Y-axis coordinate of initial pictures evaluation of markers point；
3）Step 2）After end, sheet material is moved along direction of feed in the presence of feeding roller and further moved, then measuring mechanism
Measure the actual Y-axis coordinate of now mark point；
4）Judge whether sheet material motion offsets according to the difference of actual Y-axis coordinate and initial Y-axis coordinate.
Wherein, initial Y-axis coordinate is the ideal coordinates of mark point.When sheet material moves to punch press under the driving of feeding roller
During stamped area, sheet material mark point also moves to punch press stamped area therewith, now, and the coordinate of the mark point of sheet material is designated as sheet material
The actual position coordinate of mark point, actual position coordinate is compared with ideal coordinates, so that it may judge the feed motion of sheet material
With the presence or absence of the problem of wandering off, and can obtain sheet material X/Y plane walk it is to the rear produced by offset size, greatly facilitated and sent
The debugging process of material machine, reduces the technical requirements to commissioning staff, improves debugging efficiency.
Mark point of the present invention is cross mark point, the center of the center of circle either sheet material of round piece.The program
Purpose be that providing one is easy to judge the reference point whether sheet material wanders off, and is easy to image recognition and manual identified.
Compared with prior art, the punch press feeder and its method of work for the quick identification sheet material skew that the present invention is provided pass through
Sheet material mark point position recognizes and analyzed, and accurately shows the position coordinates of mark point, is the sheet material driving before feeder dispatches from the factory
Partial inspection greatly facilitates inspection, judgement and debugging process that whether sheet material wanders off, reduced there is provided the foundation quantified
The technical requirements of commissioning staff, improve inspection debugging efficiency, substantially reduce sheet material and wander off caused product disqualification rate.This
Invention installs video camera by the camera watch region near drift, so that it may which the sheet material and its mark point in camera watch region are clapped
According to according to the information of mark point in the image of shooting, the position coordinates of mark point being can obtain after control system is handled, especially
It is the coordinate of the Y-direction of mark point；Afterwards, when sheet material moves further into stamped area under the driving of feeding roller, utilize
The Steel Ruler can be measured to the mark point moved in stamped area, so that the actual bit to mark point in the Y direction
Coordinate is put, the coordinate value is designated as Y（Actual value）, by Y（Actual value）With Y（Ideal value）It is compared, so as to judge sheet material
Whether wander off, and can obtain the size of offset, i.e. offset a=Y（Actual value）—Y（Ideal value）.
Brief description of the drawings
Fig. 1 is sheet material deflection the first schematic diagram of harmful effect of the embodiment of the present invention.
Fig. 2 is sheet material deflection the second schematic diagram of harmful effect of the embodiment of the present invention.
Fig. 3 implements the punch press feeder front view of quick identification sheet material skew for the present invention.
Fig. 4 implements the punch press feeder top view of quick identification sheet material skew for the present invention（Sheet material does not wander off）.
Fig. 5 implements the punch press feeder top view of quick identification sheet material skew for the present invention（Sheet material wanders off）.
Fig. 6 implements the punch press feeder measurement procedure figure of quick identification sheet material skew for the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Base
Embodiment in the present invention, it is all that those of ordinary skill in the art are obtained on the premise of creative work is not made
Other embodiment, belongs to the scope of protection of the invention.
As shown in figure 1, wandering off due to sheet material 3, the impact position of current drift 4 is not completely in sheet material 3
On, the consequence caused is that the workpiece 2 machined has breach.Wherein sheet material 3 is by forming breach 5 after the punching press of drift 4.
As shown in Fig. 2 wandering off due to sheet material 3, the position that workpiece 2 is planned is not on sheet material 3.It can be seen that, plate
Wandering off for material 3 not only brings the waste of material, moreover, reducing the qualification rate of product.
For the foregoing reasons, a kind of punch press feeder of quick identification sheet material skew, including feeding are present embodiments provided
Roller 7, drift 4, video camera 6, sheet material Motion Control Platform 1, drive mechanism, analytical equipment and measuring mechanism.
The horizontal of sheet material Motion Control Platform 1 is set, and the horizontal of feeding roller 7 is arranged on sheet material Motion Control Platform 1, plate
Material 3 is moved along direction of feed between sheet material Motion Control Platform 1 and feeding roller 7.Drive mechanism is connected with feeding roller 7, feeding
Roller 7 is used to transport sheet material 3 along direction of feed.
Horizontal plane is X/Y plane, and the direction of feed of sheet material is that vertical with X-axis direction in X-axis, X/Y plane is Y-axis, with XY
The vertical direction of plane is Z axis.
Mark point is provided with sheet material 3.Mark point is sheet material mark point.
Video camera 6 is arranged at the top of sheet material Motion Control Platform 1, video camera 6 and measuring mechanism along direction of feed successively
Set, the shooting direction of video camera 6 is along Z axis, and video camera 6 is used for initial pictures of the shot mark point in camera watch region, analysis
Device is connected with video camera 6, and analytical equipment is used for the initial Y-axis coordinate according to initial pictures evaluation of markers point；When sheet material 3 enters
During the stamped area of drift 4, the actual Y-axis coordinate of measuring mechanism measurement markers point.
Preferably, the present embodiment analytical equipment selects motion control computer.
Preferably, the shot region and camera watch region of the present embodiment camera are equal.
In order to reduce calculation error and measurement error, video camera 6, sheet material Motion Control Platform 1 and drift 4 are in X/Y plane
Position coordinates fix, video camera 6 is used to shoot the sheet material 3 of the lower section of drift 4, is included in the image of the shooting of video camera 6
The positional information of mark point.The position letter of the mark point of sheet material in the image shot by motion control computer to video camera 6
Breath is handled and analyzed, and obtains position coordinates of the sheet material mark point along X-axis and Y direction.Because the motion of X-axis is relatively smart
Really, only drift condition can just be made and clearly judged by the skew of Y-axis coordinate, while only needing to repair Y-axis coordinate
Just, just sheet material can be returned on the central axis of sheet material Motion Control Platform, therefore only needs to measure the position seat of Y direction
Mark can just meet and be actually needed.
Actual Y-axis coordinate can be measured by the Steel Ruler 8 being installed in punch press stamped area and obtained, and can also pass through its other party
Just the instrument measured measures acquisition, thus, can obtain the actual position coordinate of mark point, especially actual Y-axis coordinate.
Preferably, the present embodiment measuring mechanism is Steel Ruler 8.
Drift 4 is adjacent with Steel Ruler 8, or, Steel Ruler 8 is arranged in the stamped area of drift 4.As drift 4 is in XY
Coordinate spacing of the coordinate and Steel Ruler 8 of plane between the coordinate of X/Y plane is smaller.
Further, video camera 6 is arranged on the top of sheet material 3, and video camera 6 can be adjacent with drift 4.
Due to sheet material 3 deviation not all the time in one direction, cause to be possible to deviate in actual feeding process very big,
But the deviation very little that measurement is drawn, in order to reduce measurement error, in the case where installation site allows, close proximity to drift 4
Position.Safe distance between video camera 6 and drift 4 can make in the cognitive range of those skilled in the art clearly to be sentenced
It is disconnected.
Based on the punch press feeder of above-mentioned quick identification sheet material skew, the present embodiment also provides the quick identification sheet material skew
Punch press feeder method of work, it is characterised in that：Comprise the following steps：
1）Mark point is made on sheet material 3（Mark point is sheet material mark point）；
2）Sheet material 3 is moved in the presence of feeding roller 7 along direction of feed, and mark point initially enters the camera watch region of video camera 6, takes the photograph
Camera 6 to mark point shoot obtaining initial pictures, and analytical equipment is sat according to the initial Y-axis of initial pictures evaluation of markers point
Mark；Wherein, initial Y-axis coordinate is the ideal coordinates of mark point, is that easy description is designated as Y（Ideal value）.
3）Step 2）After end, sheet material 3 is moved along direction of feed in the presence of feeding roller 7 and further moved, Ran Hougang
The actual Y-axis coordinate of the sheet material measurement 3 of board foot 8 mark point in stamped area；Actual Y-axis coordinate is designated as Y（Actual value）；
4）Judge whether sheet material motion offsets according to the difference of actual Y-axis coordinate and initial Y-axis coordinate；To the Y of mark point（It is preferable
Value）With the Y of mark point（Actual value）It is compared, obtains offset of the mark point along Y direction, that is, sheet material is along Y direction
Offset.
When moving to punch press stamped area under driving of the sheet material 3 in feeding roller 7, sheet material mark point also moves to punching therewith
Bed stamped area, now, the coordinate of the mark point of sheet material 3 is designated as the actual position coordinate of sheet material mark point, actual position coordinate
It is compared with ideal coordinates, so that it may judge the feed motion of sheet material 3 with the presence or absence of the problem that wanders off, and can obtain sheet material in XY
Plane walks produced offset size to the rear, has greatly facilitated the debugging process of feeder, has reduced to commissioning staff's
Technical requirements, improve debugging efficiency.Cause simultaneously because actual deviation often deviates for Y direction, the deviation of X-direction is only needed
Sheet material Motion Control Platform 1 is adjusted, it is to avoid the adjustment of feeding roller 7.
Preferably, mark point is cross mark point, the center of the center of circle either sheet material 3 of circular workpiece 2.The party
The purpose of case is that providing one is easy to judge the reference point whether sheet material wanders off, and is easy to image recognition and manual identified.
The present embodiment employs sheet material mark point Characteristic Extraction and computing technique, by camera 6, in shot region just
The image including mark point can must be included comprising sheet material 3, the position for judging sheet material mark point can be found out by image processing techniques
Put coordinate Y（Ideal value）, thus just can obtain the reference coordinate whether shifted in motion process of the sheet material after.By Y
（Actual value）With Y（Ideal value）It is compared, so as to judge whether sheet material wanders off, and can obtain the size of offset, i.e.,
Offset a=Y（Actual value）—Y（Ideal value）.
The method of work of the present embodiment is convenient, directly perceived, easily realize, only Y-axis coordinate can be analyzed, without cumbersome
Artificial detection and adjustment just may be such that sheet material all the time in the feeding state that does not offset, it is achieved thereby that convenient, fast, nothing
The detection process of operating personnel's subjective experience is needed, the purpose that intelligent, automatic detection sheet material wanders off has been reached, so as to reduce
The fraction defective of product.
Specific case used herein is set forth to the principle and embodiment of the present invention, and above example is said
The bright method and its core concept for being only intended to help to understand the present invention；Simultaneously for those of ordinary skill in the art, foundation
The thought of the present invention, will change in specific embodiments and applications.In summary, this specification content is not
It is interpreted as limitation of the present invention.
Claims (6)
1. a kind of punch press feeder of quick identification sheet material skew, including feeding roller and drift, it is characterised in that：Also include shooting
Machine, sheet material Motion Control Platform, drive mechanism, analytical equipment and measuring mechanism；
Wherein, the sheet material Motion Control Platform horizontal is set, and feeding roller horizontal is arranged on sheet material Motion Control Platform,
Sheet material is moved along direction of feed between sheet material Motion Control Platform and feeding roller, and mark point is provided with sheet material；Drive mechanism
It is connected with feeding roller, feeding roller is used to transport sheet material along direction of feed；
Note horizontal plane is X/Y plane, and the wherein direction of feed of sheet material is X-axis, and the direction vertical with X-axis is Y-axis in X/Y plane, with
The vertical direction of X/Y plane is Z axis；
Video camera is arranged at the top of sheet material Motion Control Platform, and video camera and measuring mechanism set gradually along direction of feed, taken the photograph
The shooting direction of camera is along Z axis, and video camera is used for initial pictures of the shot mark point in camera watch region, analytical equipment and shooting
Machine is connected, and analytical equipment is used for the initial Y-axis coordinate according to initial pictures evaluation of markers point；When sheet material enters the Stamping Area of drift
During domain, the actual Y-axis coordinate of measuring mechanism measurement markers point.
2. the punch press feeder of quick identification sheet material skew according to claim 1, it is characterised in that：The drift is with surveying
Measuring mechanism is adjacent, or, measuring mechanism is arranged in the stamped area of drift.
3. the punch press feeder of quick identification sheet material skew according to claim 1 or 2, it is characterised in that：The shooting
Machine is adjacent with drift.
4. the punch press feeder of quick identification sheet material skew according to claim 1 or 2, it is characterised in that：The measurement
Mechanism is Steel Ruler.
5. a kind of work side of the punch press feeder of quick identification sheet material skew as described in claim 1-4 any claims
Method, it is characterised in that：Comprise the following steps：
1）Mark point is made on sheet material；
2）Sheet material is moved in the presence of feeding roller along direction of feed, and mark point initially enters the camera watch region of video camera, shooting
Machine carries out shooting and obtaining initial pictures to mark point, and analytical equipment is according to the initial Y-axis coordinate of initial pictures evaluation of markers point；
3）Step 2）After end, sheet material is moved along direction of feed in the presence of feeding roller and further moved, then measuring mechanism
Measure the actual Y-axis coordinate of now mark point；
4）Judge whether sheet material motion offsets according to the difference of actual Y-axis coordinate and initial Y-axis coordinate.
6. the method for work of the punch press feeder of quick identification sheet material skew according to claim 5, it is characterised in that：Institute
It is cross mark point, the center of the center of circle either sheet material of round piece to state mark point.
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| CN201710422541.7A CN107088590A (en) | 2017-06-07 | 2017-06-07 | The punch press feeder and its method of work of a kind of quick identification sheet material skew |
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| CN201710422541.7A CN107088590A (en) | 2017-06-07 | 2017-06-07 | The punch press feeder and its method of work of a kind of quick identification sheet material skew |
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| CN109746336A (en) * | 2019-02-18 | 2019-05-14 | 上海宝承自动化设备有限公司 | A kind of punch press feeder feeding mechanism |
| CN111530981A (en) * | 2020-05-09 | 2020-08-14 | 王洪兴 | Copper strips system of processing |
| CN112223423A (en) * | 2020-08-17 | 2021-01-15 | 苏州思立达电子有限公司 | Method for judging adhesive tape die-cutting straightness through edge contact |
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| CN111530981A (en) * | 2020-05-09 | 2020-08-14 | 王洪兴 | Copper strips system of processing |
| CN111530981B (en) * | 2020-05-09 | 2021-12-17 | 三门峡汇盛电工科技有限公司 | Copper strips system of processing |
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Application publication date: 20170825 |