CN115482228A - Preparation process for strengthening cutting edge by using laser cladding technology - Google Patents

Preparation process for strengthening cutting edge by using laser cladding technology Download PDF

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Publication number
CN115482228A
CN115482228A CN202211176042.1A CN202211176042A CN115482228A CN 115482228 A CN115482228 A CN 115482228A CN 202211176042 A CN202211176042 A CN 202211176042A CN 115482228 A CN115482228 A CN 115482228A
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blade
laser cladding
server
judges
main
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CN115482228B (en
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梁改媛
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Yangjiang Anjiale Kitchen Industry Co ltd
Yangjiang Anjiayuan Hardware Products Co ltd
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Yangjiang Anjiale Kitchen Industry Co ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/0002—Inspection of images, e.g. flaw detection
    • G06T7/0004—Industrial image inspection
    • G06T7/001—Industrial image inspection using an image reference approach
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/60—Analysis of geometric attributes
    • G06T7/62—Analysis of geometric attributes of area, perimeter, diameter or volume
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/30—Subject of image; Context of image processing
    • G06T2207/30108—Industrial image inspection
    • G06T2207/30116—Casting
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/30—Subject of image; Context of image processing
    • G06T2207/30108—Industrial image inspection
    • G06T2207/30136—Metal
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/30—Subject of image; Context of image processing
    • G06T2207/30168—Image quality inspection
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Abstract

The invention relates to the technical field of image recognition, in particular to a preparation process for strengthening a blade by using a laser cladding technology, which comprises the following steps: collecting appearance information of the cutting edge; analyzing the cutting direction and the main force application part of the blade, and planning a path; when the server completes a laser cladding path, setting the laser cladding thickness according to the design impact point of the blade; forming a standard contrast image, and controlling an execution module to operate the laser cladding blade according to the setting; and collecting the appearance of the blade, and comparing the appearance with a standard contrast image to judge the quality of the laser cladding blade. Compared with the prior art, the laser cladding method has the advantages that the laser cladding operation is performed in a segmented mode by dividing the blade into the parts which are easy to wear by using the appearance of the blade, so that the integral strength of the blade is effectively improved, and the fact accuracy of laser cladding the blade is effectively improved.

Description

Preparation process for strengthening cutting edge by using laser cladding technology
Technical Field
The invention relates to the technical field of image recognition, in particular to a preparation process for strengthening a cutting edge by using a laser cladding technology.
Background
The laser cladding technology is developed rapidly in recent years as a technology aiming at part reinforcement, and the laser cladding is carried out on the cutting edge of the cutter, so that the wear resistance of the cutting edge of the cutter can be effectively improved, and the cutter is more convenient to use. Chinese patent application publication no: CN110218998A discloses a method for preparing a self-sharpening cutter based on surface laser cladding treatment at the cutting edge of the cutter, which utilizes a mode of arranging a cladding layer on one surface of the cutting edge to ensure that the abrasion degrees of the two surfaces of the cutting edge are different, thereby leading the cutting edge to be sharper and sharper, achieving the effect of self-sharpening, and greatly prolonging the service life of the cutter; chinese patent application publication no: CN106738062A discloses a two-dimensional gradient die-cutting knife roller and a method for forming a knife edge thereof, which utilizes a method of setting laser cladding powder with different hardness to change the strength of a single knife edge at different positions.
Therefore, the technical scheme has the following problems: the position of the blade which is easy to wear cannot be judged, so that the laser cladding strengthening position and the actual using position deviate.
Disclosure of Invention
Therefore, the invention provides a preparation process for strengthening a cutting edge by using a laser cladding technology, which is used for solving the problem that the laser cladding fact accuracy is reduced due to the fact that the deviation between a laser cladding strengthening position and an actual using position is caused by the fact that the position which is easy to wear of the cutting edge cannot be judged in the prior art.
In order to achieve the purpose, the invention provides a preparation process for strengthening a cutting edge by using a laser cladding technology, which comprises the following steps:
s1, collecting appearance information of the blade by using an image collecting module, and transmitting the information to a server;
s2, when the server obtains the appearance information of the blade, analyzing the cutting direction and the main force application part of the blade to plan a laser cladding path;
s3, when the server finishes the path planning of the laser cladding, setting the thickness of the laser cladding according to the design impact point of the blade so as to enhance the durability of the blade;
s4, when the server completes the path setting and the laser cladding thickness setting according to the appearance information of the blade, the server generates a standard contrast image when the blade completes the laser cladding, and controls an execution module to operate the laser cladding blade according to the setting;
and S5, when the laser cladding operation is finished, the image acquisition module acquires the appearance of the blade and compares the appearance with the standard contrast image to judge the quality of the laser cladding blade.
Further, when the image acquisition module acquires appearance information of the cutting edge and transmits the appearance information to the server, the server establishes a coordinate system on a projection plane of the cutting edge, wherein the origin of the coordinate system is the position of the tool nose of the cutting edge, and the server establishes an appearance function y = F (x) of the cutting edge according to the appearance contour of the cutting edge, wherein y is a vertical coordinate of the projection of the cutting edge, and x is a horizontal coordinate of the projection of the cutting edge; the derivative of the appearance function y = F (x) is y ', the server analyzes the cutting edge according to the continuity of y',
if y' exists in any x value in the range of y, the server judges that the shape of the blade is streamline, and takes the appearance function y = F (x) as a laser cladding path to carry out laser cladding operation;
if y 'does not exist in any x value in the range of y, the server judges that the shape of the blade is zigzag, and judges that the blade part corresponding to y' > 0 is used for carrying out segmented laser cladding operation.
Further, when the server judges that a single blade is streamline, the server takes the blade corresponding function origin as the starting point position, the blade corresponding function y derivative y' =0 as the blade position as the end point, and the server sets the blade part from the starting point to the end point as the main acting part, and the corresponding part is the non-main part.
Further, when the server judges that the single blade is in the sawtooth shape, the server judges that the position where the y' does not exist is a tooth tip part, and further judgment is carried out according to the x value corresponding to each tooth tip part;
for the ith blade, wherein i =1,2,3, \8230;, n, n is the maximum number of blades, the number of tips of the ith blade is Qi, the server is further provided with a first predetermined number of tips Q α and a second predetermined number of tips Q β, wherein Q α < Q β is greater than 0, the first predetermined number of tips Q α is the minimum number of active tips and the second predetermined number of tips Q β is the maximum number of active blades, the server compares Qi with Q α and Q β to determine the cutting action of the tips of the blade in the cutting action,
if Qi is less than Q alpha, the server judges that the cutting action of the sawtooth in the blade cutting is small, judges that the origin of the function corresponding to the blade is the starting point position, the blade position of the derivative y 'of the function corresponding to the blade, which corresponds to the first y' =0, is the end point, and the position from the starting point to the end point is the main acting force part of the ith blade;
if Q alpha is not less than Qi and not more than Q beta, the server judges that the sawtooth is in the cutting action generated in the cutting of the blade, the original point of the function corresponding to the blade is the starting point position, the position of the derivative y 'of the function y corresponding to the blade is the end point, the position of the blade corresponding to the first y' =0, and the positions of all tooth tips of the blade are main acting parts of the ith blade;
and if Q beta is less than Qi, the server judges that the cutting action of the saw teeth in the blade cutting is large, and judges that the tooth tip positions are main acting parts of the blade.
Further, when the server determines the main force application part of the single serrated blade, the server is provided with a tip reinforcement necessary distance δ p, and when the main force application part is the tip, the server determines a blade part in the range of δ p before and after the tip as the main force application part, and at the same time, the server sets a position of the serrated blade not belonging to the main force application part as a non-main part.
Further, when the server determines the main acting part and the non-main part of the single blade, a first preset thickness d α and a second preset thickness d β are set in the server, wherein d α is greater than 0 and less than d β, when the laser cladding operation is performed, the server controls the execution module to perform laser cladding on the main acting part of the single blade by using the second preset thickness d β, and controls the execution module to perform laser cladding on the non-main part of the single blade by using the first preset thickness d α, and meanwhile, the server performs pre-generation on a laser cladding image of the blade to judge the quality of the laser cladding by using a standard comparison map.
Further, when the server controls the execution module to perform the laser cladding operation on the ith blade, the jth part of the ith blade is preset with a laser cladding thickness Pi j and a laser cladding rate Vi j, wherein j =1,2,3, \8230;, m, m is the maximum number of bits of the blade, the server is provided with a first preset thickness pa, a second preset thickness pp, a first preset laser cladding rate va and a second preset laser cladding rate V β, wherein pa < P > 0 < P β, va < V > 0 < V β, the first preset thickness pa is a non-main part thickness, the second preset thickness P β is a main impact point thickness, the first preset laser cladding rate va is a maximum low-speed laser cladding rate, the second preset laser rate V β is a minimum high-speed laser cladding rate, and V β correspond to pa, pa and P β correspond to Pi, P j is compared with P α and P β, so as to determine the rate of Vi j,
if Pi j is less than P alpha, the server judges that the j-th position is a non-main part and judges that Vij = V beta, and simultaneously, the server controls the execution module to use the V beta to perform laser cladding operation;
if the P alpha is less than or equal to the Pi j and less than or equal to the P beta, the server judges that the jth position is a transition part and further judges according to the jth-1 position, wherein the thickness of the jth +1 position is different from that of the jth-1 position;
if the j-1 th position is the main force application part, the server judges that the j th position is the rear end of the main force application part, and simultaneously controls the execution module to accelerate and stop spraying the laser cladding material;
if the j-1 th position is the non-main part, the server judges that the j position is the front end of the main acting part, and simultaneously, the server controls the execution module to decelerate;
and if the P beta is less than the Pi j, the server judges that the j-th position is a main acting part, judges that Vij = V alpha, and controls the execution module to perform laser cladding operation by using the V alpha.
Further, when the server controls the execution module to complete the laser cladding operation of a single blade, the server controls the image acquisition module to shoot the blade and transmit a completed image to the server, meanwhile, the server compares the standard contrast image with the outline of the completed image, and if the area enclosed by the outline of the main acting part of the blade and the horizontal coordinate is larger than the corresponding position of the standard contrast image, the server judges that the laser cladding of the blade is qualified.
Further, when the server judges that the laser cladding of the single blade is unqualified, the server judges that the corresponding unqualified part of the blade is subjected to secondary laser cladding according to the standard contrast image.
Further, when the server determines to perform secondary laser cladding, the server controls the execution module to perform secondary laser cladding on the unqualified part by taking the distance of δ p before the start of the unqualified part as a starting point, taking V beta as a laser cladding rate and taking y = F (x) as a path until the distance of δ p after cladding to the tail end of the unqualified part.
Compared with the prior art, the laser cladding method has the advantages that the laser cladding operation is performed in a segmented mode by dividing the blade into the parts which are easy to wear by using the appearance of the blade, so that the integral strength of the blade is effectively improved, and the fact accuracy of laser cladding the blade is effectively improved.
Furthermore, by analyzing the appearance of the blade, the classification of the blade is judged and the laser cladding path is determined, so that the laser cladding path is effectively simplified, and the fact accuracy of the laser cladding blade is further improved.
Further, the actual use part of the blade is determined by analyzing the shape trend of the streamline blade, so that the material is effectively saved, and the fact accuracy of laser cladding of the blade is further improved.
Further, through the mode of analyzing the shape trend of the sawtooth-shaped cutting edge, the classification of the sawtooth-shaped cutting edge is refined, the accuracy of judging the sawtooth action is effectively improved, and meanwhile the fact accuracy of laser cladding cutting edges is further improved.
Further, through the mode that sets up the reinforcement buffer distance to the sawtooth-shaped cutting edge prong, when effectively having avoided the error that leads to because of laser cladding operation itself, further promoted the fact precision of laser cladding cutting edge.
Furthermore, through the mode of presetting the laser cladding, the image of the qualified product of the cutting edge is formed, and the fact accuracy of the laser cladding cutting edge is further improved while the product quality of the laser cladding operation is effectively improved.
Furthermore, the thickness of laser cladding is controlled by adjusting the laser cladding rate, so that the number of unqualified products caused by expansion of laser cladding products due to different materials is effectively reduced, and the fact accuracy of the laser cladding blade is further improved.
Furthermore, through the mode of comparing the laser cladding product with the corresponding preset qualified product image, the accuracy of quality judgment of laser cladding is effectively improved, and meanwhile the fact accuracy of the laser cladding blade is further improved.
Furthermore, unqualified products are repaired in a secondary cladding mode, so that the material waste rate is effectively reduced, and the fact accuracy of laser cladding of the cutting edge is further improved.
Furthermore, unqualified products are repaired in advance and in a wrong repairing mode, and the fact accuracy of the laser cladding cutting edge is further improved while the repairing accuracy is effectively improved.
Drawings
FIG. 1 is a flow chart of a manufacturing process for strengthening a blade by using a laser cladding technology according to the present invention;
FIG. 2 is a schematic structural diagram of a manufacturing apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic view of a streamlined blade according to an embodiment of the present invention;
FIG. 4 is a schematic view of a small serrated edge for serrated cutting according to an embodiment of the present invention;
FIG. 5 is a schematic view of a serrated edge in a serrated cutting action according to an embodiment of the present invention;
FIG. 6 is a schematic view of a saw blade with a large serrated edge for a serrated cutting action according to an embodiment of the present invention;
wherein: 1: a main force application part; 2: non-main part.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described in conjunction with the following examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Fig. 1 is a flow chart of a manufacturing process for strengthening a blade by using a laser cladding technique according to the present invention, which includes:
s1, collecting appearance information of the blade by using an image collecting module, and transmitting the information to a server;
s2, when the server obtains the appearance information of the blade, analyzing the cutting direction and the main acting part of the blade to plan a laser cladding path;
s3, when the server completes a laser cladding path, setting the laser cladding thickness according to the design stress point of the blade so as to enhance the durability of the blade;
s4, when the server completes path setting and laser cladding thickness setting according to appearance information of the blade, the server generates a standard contrast image when the blade completes laser cladding, and controls an execution module to perform operation on the laser cladding blade according to the setting;
and S5, when the laser cladding operation is finished, the image acquisition module acquires the appearance of the blade and compares the appearance with a standard contrast image to judge the quality of the laser cladding blade.
FIG. 2 is a schematic diagram of a manufacturing apparatus according to an embodiment of the present invention.
The mode that the appearance of utilizing the cutting edge uses the wearing and tearing position with the cutting edge division carries out the laser cladding operation in segments, when effectively having promoted the bulk strength of cutting edge, has effectively promoted the fact precision of laser cladding cutting edge.
Specifically, when the image acquisition module acquires appearance information of the cutting edge and transmits the appearance information to the server, the server establishes a coordinate system on a projection plane of the cutting edge, wherein the origin of the coordinate system is the position of the cutting edge, and the server establishes an appearance function y = F (x) of the cutting edge according to the appearance profile of the cutting edge, wherein y is a vertical coordinate of the projection of the cutting edge, and x is a horizontal coordinate of the projection of the cutting edge; the derivative of the appearance function y = F (x) is y ', the server analyzes the blade according to the continuity of y',
please refer to fig. 3, which is a schematic view of a streamlined blade according to an embodiment of the present invention,
wherein, the laser cladding thickness of the non-main part 2 is smaller than that of the main acting part 1.
If y' exists in any x value in the range of y, the server judges that the shape of the blade is streamline, and takes the appearance function y = F (x) as a laser cladding path to carry out laser cladding operation;
if y 'does not exist in any x value in the range of y, the server judges that the shape of the blade is zigzag, and judges that the blade part corresponding to y' > 0 is subjected to segmented laser cladding operation.
Through the mode of analyzing the appearance of the cutting edge, the classification of the cutting edge is judged and the laser cladding path is determined, so that the laser cladding path is effectively simplified, and the fact accuracy of the laser cladding cutting edge is further improved.
Specifically, when the server determines that a single blade is a streamline shape, the server sets the blade portion from the start point to the end point as the main force application portion, the and portion of which is the non-main portion, with the origin of the blade correspondence function as the start point position and the blade position corresponding to the derivative y' =0 of the blade correspondence function y as the end point.
Through the mode of analyzing the shape trend of the streamline type cutting edge, the actual use part of the cutting edge is determined, and the fact accuracy of laser cladding cutting edges is further improved while materials are effectively saved.
Specifically, when the server judges that a single blade is serrated, the server judges that the position where y' does not exist is a tooth tip part, and further judgment is carried out according to the x value corresponding to each tooth tip part;
for the ith blade, where i =1,2,3, \8230;, n, n is the maximum blade number, the number of tips of the ith blade is Qi, the server is further provided with a first predetermined number of tips Q α and a second predetermined number of tips Q β, where Q α < Q β is greater than 0, the first predetermined number of tips Q α is the minimum effective number of tips and the second predetermined number of tips Q β is the maximum effective number of blades, the server compares Qi with Q α and Q β to determine the cutting action of the tips of the blade in the cutting action,
fig. 4 is a schematic view of a saw-tooth cutting edge with a small saw-tooth cutting effect according to an embodiment of the present invention.
If Qi is less than Q alpha, the server judges that the cutting action of the saw teeth in the blade cutting process is small, and judges that the original point of the function corresponding to the blade is the starting point position, the blade position of the derivative y 'of the function y corresponding to the blade, which corresponds to the first y' =0, is the end point, and the position from the starting point to the end point is the main acting part of the ith blade;
FIG. 5 is a schematic view of a saw-tooth blade for a saw-tooth cutting operation according to an embodiment of the present invention.
If Q alpha is not less than Qi and not more than Q beta, the server judges that the sawtooth is in the cutting action generated in the cutting of the blade, and judges that the origin of the function corresponding to the blade is the starting point position, the position of the derivative y 'of the function y corresponding to the blade is the terminal point corresponding to the first blade position where y' =0 is, and the positions of all tooth tips of the blade are main acting parts of the ith blade;
fig. 6 is a schematic view of a saw blade with a large saw tooth cutting effect according to an embodiment of the present invention.
If Q beta is less than Qi, the server judges that the cutting action of the saw teeth in the blade cutting is large, and judges that the positions of the tooth tips are main acting parts of the blade.
Through the mode of analyzing the shape trend of the sawtooth-shaped cutting edge, the classification of the sawtooth-shaped cutting edge is refined, and the fact accuracy of the laser cladding cutting edge is further improved while the accuracy of judging the sawtooth effect is effectively improved.
Specifically, when the server determines the main force application part of a single serrated blade, the server sets the tooth point reinforcement necessary distance δ p, and when the main force application part is the tooth point, the server determines the blade part in the range of δ p before and after the tooth point as the main force application part, and sets the position of the serrated blade not belonging to the main force application part as the non-main part.
Through setting up the mode to the reinforcement buffer distance of zigzag cutting edge prong, when effectively having avoided the error that leads to because of laser cladding operation itself, further promoted the fact precision of laser cladding cutting edge.
Specifically, when the server determines a main acting part and a non-main part of a single blade, a first preset thickness d alpha and a second preset thickness d beta are arranged in the server, wherein d alpha is more than 0 and less than d beta, when laser cladding operation is carried out, the server controls the execution module to carry out laser cladding on the main acting part of the single blade by using the second preset thickness d beta, the server controls the execution module to carry out laser cladding on the non-main part of the single blade by using the first preset thickness d alpha, and meanwhile, the server carries out pre-generation on a laser cladding image of the blade so as to judge the quality of the laser cladding by using the laser cladding image as a standard.
Through the mode of presetting the laser cladding, the image of the qualified product of the cutting edge is formed, the quality of the laser cladding operation product is effectively improved, and meanwhile the fact accuracy of the laser cladding cutting edge is further improved.
Specifically, when the server controls the execution module to carry out laser cladding operation on the ith blade, the jth part of the ith blade is preset with laser cladding thickness Pi j and laser cladding rate Vij, wherein j =1,2,3, \8230;, m and m are the maximum positions of the blade, the server is provided with a first preset thickness P alpha and a second preset thickness P beta, a first preset laser cladding rate V alpha and a second preset laser cladding rate V beta, wherein, P alpha is more than 0 and less than P beta, V alpha is more than 0 and less than V beta, the first preset thickness P alpha is the thickness of a non-main part, the second preset thickness P beta is the thickness of a main impact point, the first preset laser cladding rate V alpha is the maximum low-speed laser cladding rate, the second preset laser cladding rate V beta is the minimum high-speed laser cladding rate, V beta corresponds to P alpha, V alpha corresponds to P beta, pi j is compared with P alpha and P beta to determine the rate of Vij,
if Pi j is smaller than P alpha, the server judges that the jth position is a non-main part, and judges that Vij = V beta, and meanwhile, the server controls the execution module to perform laser cladding operation by using the V beta;
if the P alpha is less than or equal to the Pi j and less than or equal to the P beta, the server judges the jth position as a transition part and further judges according to the jth-1 position, wherein the thickness of the jth +1 position is different from that of the jth-1 position;
if the j-1 th position is the main acting part, the server judges that the j position is the rear end of the main acting part, and simultaneously controls the execution module to accelerate and stop spraying the laser cladding material;
if the j-1 th position is a non-main part, the server judges that the j position is the front end of a main acting part, and meanwhile, the server controls the execution module to decelerate;
and if the P beta is less than the Pi j, the server judges that the j-th position is a main acting part, judges that Vij = V alpha, and simultaneously controls the execution module to perform laser cladding operation by using the V alpha.
The thickness of laser cladding is controlled by adjusting the laser cladding rate, so that the number of unqualified products caused by expansion of laser cladding products due to different materials is effectively reduced, and the fact accuracy of the laser cladding blade is further improved.
Specifically, when the server controls the execution module to complete laser cladding operation of a single blade, the server controls the image acquisition module to shoot the blade and transmits a completed image to the server, meanwhile, the server compares a standard comparison image with the outline of the completed image, and if the area enclosed by the outline of the main force application part of the blade and the horizontal coordinate is larger than the corresponding position of the standard comparison image, the server judges that laser cladding of the blade is qualified.
Through the mode of comparing the laser cladding product with the corresponding preset qualified product image, the accuracy of quality judgment of laser cladding is effectively improved, and meanwhile the fact accuracy of the laser cladding blade is further improved.
Specifically, when the server judges that the laser cladding of a single blade is unqualified, the server judges that the corresponding unqualified part of the blade is subjected to secondary laser cladding according to the standard comparison image.
Through the mode of carrying out secondary cladding to unqualified product, repair unqualified product, when effectively having reduced the material abandonment rate, further promoted the fact precision of laser cladding cutting edge.
Specifically, when the server judges that secondary laser cladding is performed, the server controls the execution module to perform secondary laser cladding on the unqualified part by taking the distance δ p before the beginning of the unqualified part as a starting point, taking V beta as a laser cladding rate and taking y = F (x) as a path until the distance δ p after the end of the unqualified part is clad.
Through in advance and wrong back prosthetic mode, repair the defective products, when effectively having promoted the repair rate of accuracy, further promoted the fact precision of laser cladding cutting edge.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can be within the protection scope of the invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention; various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A preparation process for strengthening a cutting edge by using a laser cladding technology is characterized by comprising the following steps:
s1, collecting appearance information of the blade by using an image collecting module, and transmitting the information to a server;
s2, when the server obtains the appearance information of the blade, analyzing the cutting direction and the main force application part of the blade to plan a laser cladding path;
s3, when the server finishes the path planning of the laser cladding, setting the thickness of the laser cladding according to the design impact point of the blade so as to enhance the durability of the blade;
s4, when the server completes the path setting and the laser cladding thickness setting according to the appearance information of the blade, the server generates a standard contrast image when the blade completes the laser cladding, and controls an execution module to operate the laser cladding blade according to the setting;
and S5, when the laser cladding operation is finished, the image acquisition module acquires the appearance of the blade and compares the appearance with the standard contrast image to judge the quality of the laser cladding blade.
2. The preparation process for strengthening the blade by using the laser cladding technology as claimed in claim 1, wherein when the image acquisition module acquires appearance information of the blade and transmits the appearance information to the server, the server establishes a coordinate system on a projection plane of the blade, wherein an origin of the coordinate system is a blade tip position of the blade, and the server sets an appearance function y = F (x) of the blade according to an appearance profile of the blade, wherein y is a vertical coordinate of a projection of the blade, and x is a horizontal coordinate of the projection of the blade; the derivative of the appearance function y = F (x) is y ', the server analyzes the cutting edge according to the continuity of y',
if y' exists in any x value in the range of y, the server judges that the shape of the blade is streamline, and takes the appearance function y = F (x) as a laser cladding path to carry out laser cladding operation;
if y 'does not exist in any x value in the range of y, the server judges that the shape of the blade is zigzag, and judges that the blade part corresponding to y' > 0 is used for carrying out segmented laser cladding operation.
3. The process of claim 2, wherein when the server determines that a single blade is streamline, the server sets the blade portion from the starting point to the end point as the main force acting portion, and the corresponding portion is the non-main portion, with the blade corresponding to the function origin as the starting point position and the blade corresponding to the derivative y' =0 of the function y as the end point.
4. The process for preparing the blade strengthened by the laser cladding technology according to claim 3, wherein when the server determines that a single blade is serrated, the server determines that the position where y' does not exist is a tooth tip part, and further determines according to the x value corresponding to each tooth tip part;
for the ith blade, wherein i =1,2,3, \8230;, n, n is the maximum blade number, the number of tips of the ith blade is Qi, the server is further provided with a first predetermined number of tips Q α and a second predetermined number of tips Q β, wherein Q α < Q β is greater than 0, the first predetermined number of tips Q α is the minimum effective number of tips and the second predetermined number of tips Q β is the maximum effective number of blades, the server compares Qi with Q α and Q β to determine the cutting action of the tips of the blade in the cutting action,
if Qi is less than Q alpha, the server judges that the cutting action of the sawtooth in the blade cutting is small, judges that the origin of the function corresponding to the blade is the starting point position, the blade position of the derivative y 'of the function corresponding to the blade, which corresponds to the first y' =0, is the end point, and the position from the starting point to the end point is the main acting force part of the ith blade;
if Q alpha is not less than Qi and not more than Q beta, the server judges that the sawtooth is in the cutting action generated in the cutting of the blade, the original point of the function corresponding to the blade is the starting point position, the position of the derivative y 'of the function y corresponding to the blade is the end point, the position of the blade corresponding to the first y' =0, and the positions of all tooth tips of the blade are main acting parts of the ith blade;
and if Q beta is less than Qi, the server judges that the cutting action of the saw teeth in the blade cutting is large, and judges that the tooth tip positions are main acting parts of the blade.
5. The process for preparing a blade strengthened by a laser cladding technique according to claim 4, wherein when the server determines the main force application part of a single serrated blade, the server sets a tooth tip strengthening necessary distance δ p, and when the main force application part is the tooth tip, the server determines a blade part ranging from δ p before and after the tooth tip as the main force application part, and sets a position of the serrated blade not belonging to the main force application part as a non-main part.
6. The process for preparing the blade strengthened by the laser cladding technology according to claim 5, wherein when the server determines the main force application part and the non-main part of a single blade, the server is provided with a first preset thickness d α and a second preset thickness d β, wherein d α is greater than 0 and less than d β, when the laser cladding operation is performed, the server controls the execution module to perform laser cladding on the main force application part of the single blade by using the second preset thickness d β, and controls the execution module to perform laser cladding on the non-main part of the single blade by using the first preset thickness d α, and meanwhile, the server pre-generates a laser cladding image of the blade to judge the quality of the laser cladding by using a standard map.
7. The process of claim 6, wherein when the server controls the execution module to perform the laser cladding operation on the ith cutting edge, the jth portion of the ith cutting edge is preset with a laser cladding thickness Pij and a laser cladding rate Vij, wherein j =1,2,3, 8230, m is the maximum position number of the cutting edge, the server is provided with a first preset thickness P α and a second preset thickness P β, a first preset laser cladding rate V α and a second preset laser cladding rate V β, wherein 0 < P α < P β,0 < V α < V β, the first preset thickness P α is a non-main portion thickness, the second preset thickness P β is a main force point thickness, the first preset laser rate V α is a maximum low-speed laser cladding rate, the second preset laser rate V β is a minimum high-speed laser cladding rate, and V β correspond to P α, V α corresponds to P β, and Vij is compared with P β to determine the high-speed laser cladding rate P α,
if Pij is less than P alpha, the server judges that the jth position is a non-main part, judges that Vij = V beta, and controls the execution module to perform laser cladding operation by using the V beta;
if the P alpha is not more than Pij is not more than P beta, the server judges the jth position as a transition part and further judges according to the jth-1 position, wherein the thickness of the jth +1 position is different from that of the jth-1 position;
if the j-1 th position is the main force application part, the server judges that the j th position is the rear end of the main force application part, and simultaneously controls the execution module to accelerate and stop spraying the laser cladding material;
if the j-1 th position is the non-main part, the server judges that the j position is the front end of the main acting part, and simultaneously, the server controls the execution module to decelerate;
and if the P beta is less than Pij, the server judges that the j-th position is a main acting part, judges that Vij = V alpha, and controls the execution module to perform laser cladding operation by using the V alpha.
8. The preparation process for strengthening the blade by using the laser cladding technology as claimed in claim 7, wherein when the server controls the execution module to complete the laser cladding operation of a single blade, the server controls the image acquisition module to shoot the blade and transmits a completed image to the server, and simultaneously, the server compares the standard comparison image with a profile of the completed image, and if an area enclosed by the profile of the main acting part of the blade and the horizontal coordinate is larger than a corresponding position of the standard comparison image, the server determines that the laser cladding of the blade is qualified.
9. The process for preparing the blade strengthened by the laser cladding technology according to claim 8, wherein when the server judges that the laser cladding of a single blade is unqualified, the server judges that the corresponding unqualified part of the blade is subjected to secondary laser cladding according to the standard comparison image.
10. The process for preparing the blade strengthened by the laser cladding technology according to claim 9, wherein when the server determines to perform secondary laser cladding, the server controls the execution module to perform secondary laser cladding on the unqualified part by taking the distance δ p before the start of the unqualified part as a starting point, taking V β as a laser cladding rate, and taking y = F (x) as a path until the distance δ p after the end of the unqualified part is clad.
CN202211176042.1A 2022-09-26 2022-09-26 Preparation process for strengthening cutting edge by utilizing laser cladding technology Active CN115482228B (en)

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