CN107775229A - Welding for bi-metal bandsaw blades is to tooth method - Google Patents
Welding for bi-metal bandsaw blades is to tooth method Download PDFInfo
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- CN107775229A CN107775229A CN201810064783.8A CN201810064783A CN107775229A CN 107775229 A CN107775229 A CN 107775229A CN 201810064783 A CN201810064783 A CN 201810064783A CN 107775229 A CN107775229 A CN 107775229A
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- base band
- welding
- solder side
- feeding electrode
- feeding
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- 238000003466 welding Methods 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000002184 metal Substances 0.000 title claims abstract description 14
- 230000035611 feeding Effects 0.000 claims abstract description 103
- 229910000679 solder Inorganic materials 0.000 claims abstract description 65
- 238000001514 detection method Methods 0.000 claims description 19
- 238000004458 analytical method Methods 0.000 claims description 7
- 230000011218 segmentation Effects 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 239000000284 extract Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 16
- 238000010586 diagram Methods 0.000 description 8
- 238000004070 electrodeposition Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000997 High-speed steel Inorganic materials 0.000 description 1
- 108010074506 Transfer Factor Proteins 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000001815 facial effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/02—Carriages for supporting the welding or cutting element
- B23K37/0252—Steering means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D65/00—Making tools for sawing machines or sawing devices for use in cutting any kind of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/047—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work moving work to adjust its position between soldering, welding or cutting steps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The present invention relates to the welding for bi-metal bandsaw blades to tooth method, first base band is installed on bands for band welding equipment, the image information of feeding electrode and base band solder side is obtained, analyzing and processing, obtains the initial central axis of feeding electrode and the angle bisector of base band solder side；On the basis of angle bisector, the angle of feeding electrode is adjusted so that angular error is in target zone；Control pusher dog to carry out one or many feedings, obtain the image information of base band solder side at feeding electrode and welding post, obtain final state central axis and angle bisector；Line on the basis of line between the center of arc of each base band solder side in base band, adjust the feeding stroke of pusher dog so that alternate position spike is in target zone.Present invention welding can realize Precision measurement and positioning to tooth method, the angular error between base band solder side and feeding electrode can be reduced into ± 0.05 °, feeding position error is reduced into ± 0.01mm, bands for band welding quality is effectively ensured.
Description
Technical field
Tooth method, more particularly, to individual particle welded band are sawed the present invention relates to the welding for bi-metal bandsaw blades
The welding of bar belongs to sawing device manufacturing field to tooth method.
Background technology
In the production of individual particle welded type saw blade, particle（It is generally spherical or cylindrical）Welding is to determine that saw blade quality is non-
Normal the key link.Requirement to this process is as follows：1）Ensure that the precision of welding particle feeding position is accurate；2）Ensure base band
The accuracy of solder side feeding；3）Ensure particle and the accuracy of feeding relative position.Base band solder side is generally and granulated
The circular arc of shape matching.
For current bands for band welding equipment, in its base band feeding (pusher dog feeding), cylinder feeding typically is used, is led to
The final position for crossing limitation cylinder feeding ensures the accurate of base band solder side feeding position.This feeding style welds in base band
Face geometry and the inconsistent situation of fingers contact base band feeding position geometry, it must just adjust the end of cylinder feeding
Stop bit is put, to ensure that base band solder side is on ideal position.This Adjustment precision is typically in 0 ~ 0.5mm scope（It is but actual
The precision of welding demand will reach 0.01mm）If without appropriate detection and method of adjustment, this adjustment is difficult to very
It is accurate.
In reality in welding process, the accurate feeding of base band solder side is to ensure the one side of welding quality, the most
Crucially to realize the precision positioning of welding particle and base band solder side.Therefore, it is necessary to be detected to particle and solder side,
And this detection is not present in current pusher dog feed system.
The process of individual particle welded band saw blade welding is as follows：Fig. 1 is original state schematic diagram, and pusher dog 1 is apart from previous
The length of tooth is ds, feeding electrode distance base band solder side distance is es, the central axis of feeding electrode 2 is with horizontal to X-axis（Respectively
The line direction of individual base band solder side center of arc）Angle be θ, the distance of the center of arc of adjacent base band solder side is
ed.Fig. 2 is solder side feeding schematic diagram, and pusher dog, which moves in the X-axis direction, promotes base band motion, and feeding stroke is ds, will be unwelded
Base band solder side delivers to welding position（Welding post）, then retract to initial position.Fig. 3 is that feeding finishes welding original state
Figure, the particle 3 that feeding electrode welds needs（High-speed steel or hard alloy）Deliver at welding post, while particle is pressed on
On base band solder side.
From the point of view of foregoing process, for the error of feeding stroke or the angular error of feeding electrode, when causing welding
The site error of grain and solder side.This site error is broadly divided into three classes：1）Angle between base band solder side and feeding electrode
Error is spent, as shown in figure 4, the angle bisector of solder side and feeding electrode centers axis are not parallel, both angles are Δ θ, i.e.,
For angular error.This kind of error can cause the distribution of force inequality of solder side, the fusion penetration of weld seam during welding uneven；2）Feeding position
Error, as shown in figure 5, the angle bisector of base band solder side and the central axis of feeding electrode are parallel to each other but misaligned,
Distance between the two is Δ d, as site error, and this kind of error causes welding to misplace.3）Above two error is superimposed upon one
The error risen（It is mostly this kind of error during actual welding）.
The content of the invention
In view of the shortcomings of the prior art, it is an object of the invention to：A kind of welding pair for bi-metal bandsaw blades is provided
Tooth method, in the welding link of individual particle welded type saw blade, to realize precision positioning between particle and base band, and feedback adjustment
Ensure this accuracy.
In order to solve the above-mentioned technical problem, technical scheme is as follows：Welding for bi-metal bandsaw blades is to tooth
Method, comprise the following steps：
1) base band is installed on bands for band welding equipment, obtains the image information of feeding electrode and base band solder side；
2) to step 1）The image information of acquisition is analyzed and processed, and obtains initial central axis and the base band welding of feeding electrode
The angle bisector in face；
3) on the basis of angle bisector, the angle of feeding electrode is adjusted so that the angle between base band solder side and feeding electrode
Error delta θ is spent in target zone；
4) control pusher dog to carry out one or many feedings, obtain the image letter of base band solder side at feeding electrode and welding post
Breath, and the image information is analyzed and processed, obtain base band welding at the final state central axis and welding post of feeding electrode
The angle bisector in face；
5) line on the basis of the line between the center of arc of each base band solder side in base band, according to step 4）In final state in
The intersection point a and step 4 of mandrel line and datum line）In angle bisector and datum line intersection point b relative position relation, adjustment
The feeding stroke d of pusher dogsSo that the alternate position spike Δ d ' between intersection point a and intersection point b is in target zone.
In the present invention, initial central axis refers to before angle adjustment, the geometric centre axes of feeding electrode.In final state
Mandrel line refers to after the completion of angle adjustment, the geometric centre axes of feeding electrode.Angle bisector refers to base band solder side
The angular bisector of fillet corresponding to circular arc.
Step 1）In, base band is installed on bands for band welding equipment, then feeding electrode position is adjusted to welding post
Behind place, the image information of feeding electrode and base band solder side is obtained.
Step 3）In, after the angle for adjusting feeding electrode, the image information of feeding electrode and base band solder side is reacquired,
Analysis calculates the angular error Δ θ obtained between feeding electrode and base band solder side, when Δ θ is not in target zone, continues
It is adjusted, until Δ θ is located in target zone.
Preferably, step 3）In, when adjusting the angle of feeding electrode, single adjusted value is Δ θ.
Step 3）In, target zone is 0 ~ 0.1 °, preferably 0 ~ 0.05 °.
Step 5）In, when intersection point a points are smaller with a distance from datum line direction from pusher dog compared with intersection point b points, reduce pusher dog
Feeding stroke ds, decreasing value is line segment ab length；When intersection point a points compared with intersection point b points from pusher dog with a distance from datum line direction more
When big, increase the feeding stroke d of pusher dogs, increment value is line segment ab length.
Step 5）In, adjust the feeding stroke d of pusher dogsAfterwards, control pusher dog to carry out one or many feedings, obtain feeding electricity
The image information of base band solder side at pole and welding post, analysis calculates now alternate position spike Δ d ' size, when Δ d ' is not in mesh
When in the range of mark, continue to adjust, until Δ d ' is located in target zone.
Step 5）In, target zone is 0 ~ 0.05mm, preferably 0 ~ 0.01mm.
The acquisition methods of the central axis of feeding electrode and the angle bisector of base band solder side include following process：To figure
As information carries out gray scale adjustment, appearance profile and the base band solder side position of feeding electrode are extracted by gray level threshold segmentation method
Profile, analysis is calculated by geometry and obtains central axis and angle bisector.
As shown in fig. 7, the revolver profile a1 and right wheel profile a2 of extraction feeding electrode, because feeding electrode cross-section is rule
Shape, the central axis a3 that can obtain feeding electrode is calculated by geometry；Equally, it can extract the profile of base band solder side
Line, such as base band the contour line b1 and b2 of solder side circular arc both sides, because base band welding facial contour is in arc-shaped, base band contour line b1
It is the end points of circular arc close to two end points of circular arc with b2, the angle bisector that can obtain base band solder side is calculated by geometry
b3。
Described image information is the two-dimensional image information parallel to substrate plane.
Described image information is obtained by vision-based detection module, and the vision-based detection module includes camera, the shooting
The axis of head is vertical with plane where base material.
Preferably, the axis of camera overlaps with the center of arc of base band solder side at welding post.
Obviously, vision-based detection module can be integrated into existing welding equipment corresponding position, and configure correlometer point counting
Processing module is analysed, the automatic progress to tooth can be achieved；Special welding can also be designed according to the above method to tooth equipment, installation
To at welding post, obtain to after tooth information, being adjusted manually to pusher dog stroke, feeding electrode angle etc., can also realize weldering
Connect to tooth.
A kind of welding method of bi-metal bandsaw blades, comprises the following steps：
1）Base band to be welded is installed on bands for band welding equipment, welded using method as described above to tooth；
2）Welding.
Compared to the method manually adjusted at present, present invention welding can realize Precision measurement and positioning to tooth method, can incite somebody to action
Angular error between base band solder side and feeding electrode is reduced to ± 0.05 ° from ± 0.5 °, by feeding position error from ±
0.2mm is reduced to ± 0.01mm, and bands for band welding quality is effectively ensured；Artificial experience need not be relied on, vision-based detection mould can be relied on
Block is carried out, alignment error efficiency high.
Brief description of the drawings
Fig. 1 is bi-metal bandsaw blades welding to tooth process original state schematic diagram.
Fig. 2 is bi-metal bandsaw blades welding to tooth process solder side feeding process schematic diagram.
Fig. 3 is that bi-metal bandsaw blades welding finishes welding original state schematic diagram to tooth process feeding.
Fig. 4 is that bi-metal bandsaw blades welds the angular error schematic diagram between base band solder side and feeding electrode during to tooth.
Fig. 5 is that bi-metal bandsaw blades welds the site error schematic diagram between base band solder side and feeding electrode during to tooth.
Fig. 6 is the two dimensional image of base band solder side at the welding post obtained in the first embodiment of the invention.
Fig. 7 is that the two dimensional image of base band solder side at the welding post obtained in the first embodiment of the invention carries out ash
Schematic diagram after degree adjustment.
Fig. 8 is base band solder side and feeding electrode position error transfer factor at welding post in the first of the invention embodiment
Preceding view.
Fig. 9 is the front view of bands for band welding equipment part-structure in the first embodiment of the invention（On）, top view
（In）And partial enlarged drawing at welding post（Under）.
Embodiment
Describe the present invention in detail below with reference to accompanying drawing and in conjunction with the embodiments.It should be noted that in the feelings not conflicted
Under condition, the feature in embodiment and embodiment in the present invention can be mutually combined.For sake of convenience, hereinafter as occurred
" on ", " under ", "left", "right" printed words, only represent that the upper and lower, left and right direction with accompanying drawing in itself is consistent, do not act limiting to structure
It is set for using.
As shown in figure 9, bands for band welding equipment used includes turntable 6, turntable 6 is rotationally solid close to the position of welding post
Due in rotating shaft 9, the bottom of turntable 6 is provided with the arc-shaped guide rail 8 concentric with rotating shaft, and turntable 6 can be around the shaft 9 under arc-shaped guide rail cooperation
Stable rotation, turntable 6 drive by servomotor, and turntable 6 is with servomotor by driving hinge 10 to be connected.Servomotor rotates
Angle and turntable movement angle are in one-to-one relationship, so as to realize that the precise angle of feeding electrode positions.It is provided with turntable
Welding head 7, welding head 7 are provided with feeding electrode 2.
Vision-based detection module 5 is installed on the field range of the surface of welding post, particle and feeding electrode positioned at detection
It is interior.
Base band 4 withstands roller seating space to horizontal direction feeding by pusher dog 1, wherein, pusher dog 1 is arranged on feeding driving platform 11
On, feeding driving platform 11 is made up of servomotor, leading screw and grating scale.The precision level of platform 11 is driven to fortune by feeding
It is dynamic, so as to realize base band level to inching.
Specific welding comprises the following steps to tooth process：
1）Manually adjust, feeding electrode and base band are adjusted to vision-based detection module within sweep of the eye；
2）Vision-based detection module carries out detection of taking pictures to the base band solder side in the visual field and the relative angular position of feeding electrode, obtains
To feeding electrode and the angular error Δ θ of base band solder side；
3）Driving hinge is driven to adjust turntable angle by servomotor, adjusted value is Δ θ, detection angles error of then taking pictures again
Δ θ, is adjusted repeatedly, until the angular error Δ θ of feeding electrode and base band solder side is in ± 0.05 °；
4）After completing the adjustment of feeding electrode angle, vision-based detection module is to the phase of base band solder side and feeding electrode at welding post
Detection of taking pictures is carried out to horizontal level, obtains the alternate position spike Δ d ' of particle and base band solder side at welding post；
5）To the feeding Traffic control system of feeding driving platform, adjusted value is Δ d ', then take pictures again detection particle and welding post
Locate the alternate position spike Δ d ' of base band solder side, adjust repeatedly, until the alternate position spike Δ d ' of particle and base band solder side at welding post
In ± 0.01mm.End-state is as shown in Figure 6 and Figure 7.
Step 2）With step 3）In, take pictures detection when, to photo carry out gray scale adjustment, extracted by gray level threshold segmentation method
The appearance profile of feeding electrode and the profile at base band solder side position, analysis acquisition central axis is calculated by geometry and angle is put down
Separated time, the angle of the central axis and angle bisector is angular error Δ θ.
Step 4）With step 5）In, by take pictures detection, obtain welding post at base band solder side angle bisector and
The distance between the central axis of feeding electrode, both intersection point a and intersection point b with datum line is alternate position spike Δ d '（See Fig. 8）.
The content that above-described embodiment illustrates should be understood to that these embodiments are only used for being illustrated more clearly that the present invention, without
For limiting the scope of the present invention, after the present invention has been read, the various equivalent form of values of the those skilled in the art to the present invention
Modification each fall within the application appended claims limited range.
Claims (10)
1. the welding for bi-metal bandsaw blades is to tooth method, it is characterised in that comprises the following steps：
1）By base band（4）It is installed on bands for band welding equipment, obtains feeding electrode（2）With the image information of base band solder side；
2）To step 1）The image information of acquisition is analyzed and processed, and obtains feeding electrode（2）Initial central axis and base band
The angle bisector of solder side（b3）；
3）With angle bisector（b3）On the basis of, adjust feeding electrode（2）Angle so that base band solder side and feeding electrode
（2）Between angular error Δ θ in target zone；
4）Control pusher dog（1）One or many feedings are carried out, obtain feeding electrode（2）With the figure of base band solder side at welding post
As information, and the image information is analyzed and processed, obtain feeding electrode（2）Final state central axis and welding post at base
The angle bisector of tape welding junction（b3）；
5）With base band（4）Line on the basis of line between the center of arc of upper each base band solder side, according to step 4）In end
The intersection point a and step 4 of state central axis and datum line）In angle bisector and datum line intersection point b relative position relation,
Adjust pusher dog（1）Feeding stroke dsSo that the alternate position spike Δ d ' between intersection point a and intersection point b is in target zone.
2. welding according to claim 1 is to tooth method, it is characterised in that step 1）In, base band is installed to bands for band
On welding equipment, then by feeding electrode（2）After at position adjustment to welding post, feeding electrode is obtained（2）With base band solder side
Image information.
3. welding according to claim 1 is to tooth method, it is characterised in that step 3）In, adjust feeding electrode（2）Angle
After degree, feeding electrode is reacquired（2）With the image information of base band solder side, analysis, which calculates, obtains feeding electrode（2）And base band
Angular error Δ θ between solder side, when Δ θ is not in target zone, continue to adjust, until Δ θ is located at target model
In enclosing.
4. welding according to claim 1 is to tooth method, it is characterised in that step 3）In, target zone is 0 ~ 0.1 °.
5. welding according to claim 1 is to tooth method, it is characterised in that step 5）In, when intersection point a points are compared with intersection point b points
From pusher dog（1）Distance more hour in datum line direction, reduce pusher dog（1）Feeding stroke ds, decreasing value is line segment ab length
Degree；When intersection point a points compared with intersection point b points from pusher dog（1）When distance in datum line direction is bigger, increase pusher dog（1）Feeding stroke
ds, increment value is line segment ab length.
6. welding according to claim 1 is to tooth method, it is characterised in that step 5）In, adjust pusher dog（1）Feeding row
Journey dsAfterwards, pusher dog is controlled（1）One or many feedings are carried out, obtain feeding electrode（2）With base band solder side at welding post
Image information, analysis calculate now alternate position spike Δ d ' size, when Δ d ' is not in target zone, continue to adjust, directly
It is located to Δ d ' in target zone.
7. welding according to claim 1 is to tooth method, it is characterised in that step 5）In, target zone is 0 ~ 0.05mm.
8. the welding according to claim any one of 1-7 is to tooth method, it is characterised in that feeding electrode（2）Central shaft
The acquisition methods of the angle bisector of line and base band solder side include following process：Gray scale adjustment is carried out to image information, passed through
Gray level threshold segmentation method extracts feeding electrode（2）Appearance profile and base band solder side position profile, pass through geometry calculate point
Analysis obtains central axis and angle bisector（b3）.
9. the welding according to claim any one of 1-7 is to tooth method, it is characterised in that described image information passes through vision
Detection module obtains, and the vision-based detection module includes camera, and the axis of the camera is vertical with plane where base material.
10. a kind of welding method of bi-metal bandsaw blades, it is characterised in that comprise the following steps：
1）By base band to be welded（4）It is installed on bands for band welding equipment, utilizes the method as described in claim any one of 1-9
Welded to tooth；
2）Welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810064783.8A CN107775229B (en) | 2018-01-23 | 2018-01-23 | Welding for bi-metal bandsaw blades is to tooth method and welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810064783.8A CN107775229B (en) | 2018-01-23 | 2018-01-23 | Welding for bi-metal bandsaw blades is to tooth method and welding method |
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| Publication Number | Publication Date |
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| CN107775229A true CN107775229A (en) | 2018-03-09 |
| CN107775229B CN107775229B (en) | 2018-04-27 |
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ID=61437281
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810064783.8A Active CN107775229B (en) | 2018-01-23 | 2018-01-23 | Welding for bi-metal bandsaw blades is to tooth method and welding method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110026683A (en) * | 2019-05-27 | 2019-07-19 | 广东工业大学 | A kind of bi-metal bandsaw blades welder and method |
| CN111811437A (en) * | 2020-09-10 | 2020-10-23 | 湖南泰嘉新材料科技股份有限公司 | Band saw blade welding quality detection method and device |
| CN112059388A (en) * | 2020-09-10 | 2020-12-11 | 湖南泰嘉新材料科技股份有限公司 | Method and device for monitoring welding quality of bimetal band saw blade |
| CN112059303A (en) * | 2020-09-02 | 2020-12-11 | 湖南泰嘉新材料科技股份有限公司 | Conveying device and conveying method for particles at tooth tips of bimetallic strip saw blade |
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| CN104028886A (en) * | 2014-04-30 | 2014-09-10 | 浙江爱易特智能技术有限公司 | Automatic soldering technology for alloy saw blade |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110026683A (en) * | 2019-05-27 | 2019-07-19 | 广东工业大学 | A kind of bi-metal bandsaw blades welder and method |
| CN110026683B (en) * | 2019-05-27 | 2021-10-01 | 广东工业大学 | Welding device and method for bimetal band saw blade |
| CN112059303A (en) * | 2020-09-02 | 2020-12-11 | 湖南泰嘉新材料科技股份有限公司 | Conveying device and conveying method for particles at tooth tips of bimetallic strip saw blade |
| CN111811437A (en) * | 2020-09-10 | 2020-10-23 | 湖南泰嘉新材料科技股份有限公司 | Band saw blade welding quality detection method and device |
| CN112059388A (en) * | 2020-09-10 | 2020-12-11 | 湖南泰嘉新材料科技股份有限公司 | Method and device for monitoring welding quality of bimetal band saw blade |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107775229B (en) | 2018-04-27 |
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