CN114657553A - Laser cladding device for titanium alloy surface modification - Google Patents
Laser cladding device for titanium alloy surface modification Download PDFInfo
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- CN114657553A CN114657553A CN202210245060.4A CN202210245060A CN114657553A CN 114657553 A CN114657553 A CN 114657553A CN 202210245060 A CN202210245060 A CN 202210245060A CN 114657553 A CN114657553 A CN 114657553A
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- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 91
- 238000004372 laser cladding Methods 0.000 title claims abstract description 47
- 230000004048 modification Effects 0.000 title claims abstract description 26
- 238000012986 modification Methods 0.000 title claims abstract description 26
- 230000007246 mechanism Effects 0.000 claims abstract description 55
- 238000005253 cladding Methods 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims description 32
- 238000012545 processing Methods 0.000 claims description 25
- 230000008569 process Effects 0.000 claims description 16
- 238000010606 normalization Methods 0.000 claims description 9
- 238000005192 partition Methods 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000012937 correction Methods 0.000 claims description 3
- 230000002708 enhancing effect Effects 0.000 claims description 3
- 230000004927 fusion Effects 0.000 claims description 3
- 238000000265 homogenisation Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 230000007547 defect Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000007669 thermal treatment Methods 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 150000003608 titanium Chemical class 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J2005/0077—Imaging
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Abstract
The invention discloses a laser cladding device for titanium alloy surface modification, which comprises a fixed plate, wherein the top end of the fixed plate is provided with a plurality of supporting legs, the top ends of the supporting legs are provided with supporting plates, the top ends of the supporting plates are provided with adjusting mechanisms, and the top ends of the adjusting mechanisms are provided with positioning mechanisms; a support frame is arranged on one side of the top end of the fixed plate, the cross section of the support frame is set to be an L-shaped structure, a hydraulic cylinder is arranged at one end of the top end of the support frame, a piston rod is arranged at the bottom end of the hydraulic cylinder, and the bottom end of the piston rod penetrates through the bottom end of the support frame and is provided with a protection mechanism; a control panel is arranged on one side wall of the support frame. The titanium alloy feeding mechanism has the advantages of reasonable and reliable structure, simple and convenient operation, and capability of feeding the titanium alloy surface quickly and stably for mechanism cladding, so that the working efficiency of a cladding device for cladding the titanium alloy surface can be improved, the productivity can be further improved, and the production cost can be saved.
Description
Technical Field
The invention relates to the technical field of laser cladding, in particular to a laser cladding device for titanium alloy surface modification.
Background
The laser cladding technology is a technological method for remarkably improving the wear resistance, corrosion resistance, heat resistance, oxidation resistance, electrical characteristics and the like of the surface of a base material by placing selected coating materials on the surface of a coated base body in different filling modes, simultaneously melting a thin layer on the surface of the base body through laser irradiation, and forming a surface coating which has extremely low dilution and is metallurgically combined with the base material after rapid solidification.
The device comprises a base, one end of the roller is connected with the base, a mechanical arm and a laser head are arranged above the roller, one side, close to the base, of the mechanical arm is connected with a storage barrel through a connecting rod, fan blades are mounted on the inner wall of the bottom of the storage barrel, the bottom of the storage barrel is rotatably connected with a rotating ring, a plurality of through grooves are formed in the rotating ring, and an L-shaped plate matched with the fan blades is connected to the through grooves in a sliding mode. The modification of roll outside has been realized to above-mentioned cladding device, however, when needs are modified titanium alloy surface, because titanium alloy's kind is right, and the shape is different, consequently when carrying out laser cladding to titanium alloy surface, need carry out fixed position to the titanium alloy of different shapes, simultaneously, when carrying out laser cladding to titanium alloy surface, can produce the spark and spread all around to can bring harm to next staff's clothes, and also make titanium alloy surface produce high temperature, can't dispel the heat very fast.
In addition, when the titanium alloy surface is subjected to modified laser cladding, the cladding time is short, and the cladding material and a processing part have thermal difference, so that residual stress exists in the cladding material, and defects such as cracks and air holes appear in the cladding layer. In the prior art, laser parameters are generally optimized by using experience to reduce the defect probability, but the method is time-consuming and labor-consuming and cannot realize real-time and on-line monitoring.
An effective solution to the problems in the related art has not been proposed yet.
Disclosure of Invention
Aiming at the problems in the related art, the invention provides a laser cladding device for titanium alloy surface modification, which aims to overcome the technical problems in the prior related art.
Therefore, the invention adopts the following specific technical scheme:
a laser cladding device for titanium alloy surface modification comprises a fixing plate, wherein a plurality of supporting legs are arranged at the top end of the fixing plate, supporting plates are arranged at the top ends of the supporting legs, an adjusting mechanism is arranged at the top end of each supporting plate, and a positioning mechanism is arranged at the top end of each adjusting mechanism; a support frame is arranged on one side of the top end of the fixed plate, the cross section of the support frame is set to be an L-shaped structure, a hydraulic cylinder is arranged at one end of the top end of the support frame, a piston rod is arranged at the bottom end of the hydraulic cylinder, and the bottom end of the piston rod penetrates through the bottom end of the support frame and is provided with a protection mechanism; the support frame is provided with infrared thermal imager just to the position of laser beam machining head, and a lateral wall of support frame is provided with control panel, and adjustment mechanism, positioning mechanism, pneumatic cylinder, infrared thermal imager and protection machanism are connected with control panel electricity.
Furthermore, in order to enable the titanium alloy surface to move in the transverse and longitudinal directions during the laser cladding process, so that the titanium alloy surface can be guaranteed to be subjected to omnibearing cladding, the adjusting mechanism comprises two symmetrical support plates I arranged on one side of the top end of each support plate, and one end of one support plate is provided with a motor I; the output end of the first motor penetrates through the side wall of one of the first support plates and is provided with a first threaded rod, one end, far away from the first motor, of the first threaded rod is connected with the side wall of the other first support plate through a bearing, and a first moving block is sleeved on the circumferential side wall of the first threaded rod; the adjusting mechanism further comprises two symmetrical support plates II which are arranged at the top ends of the support plates and are positioned on one adjacent side of the support plates I, and one side of one support plate II is provided with a motor II; the output end of the second motor penetrates through the side wall of one of the second support plates and is provided with a second threaded rod, one end of the second threaded rod, far away from the second motor, is connected with the side wall of the other second support plate through a bearing, and a second moving block is sleeved on the circumferential side wall of the second threaded rod; a first threaded hole matched with the first threaded rod is formed in the side wall of one end of the first moving block, a long plate is arranged on one side wall of the first moving block, and a limiting groove is formed in the top end of the long plate; and a threaded hole II matched with the threaded rod is formed in the side wall of one end of the second moving block, a long rod is arranged on one side wall of the second moving block, a sliding block is sleeved on the side wall of the circumference of the long rod, and a limiting block matched with the limiting groove is arranged at the top end of the sliding block.
Furthermore, in order to keep the titanium alloy surface stable during cladding and clamp and position the titanium alloy in any shape, so that the stability of the titanium alloy in the cladding process is ensured, the quality of the titanium alloy surface after cladding is ensured, and meanwhile, the applicability of the cladding device is improved; the sliding groove is formed in the middle of the top end of the positioning frame, the third motor is arranged on the side wall of one end of the positioning frame, the output shaft of the third motor penetrates through the side wall of the positioning frame and is provided with the third threaded rod, and one end, far away from the third motor, of the third threaded rod is connected with the inner side wall of the sliding groove through a bearing.
Furthermore, in order to realize the connection among the driven block, the rotating block and the positioning block and further ensure the stability of the positioning mechanism in the working process, one side wall of the driven block is provided with a first arc-shaped groove, the bottom end of the driven block is provided with a connecting block matched with the sliding groove, and the middle part of one side wall of the connecting block is provided with a third threaded hole matched with the three phases of the threaded rod; an arc-shaped convex plate I matched with the arc-shaped groove I is arranged on the outer side of the circumferential side wall of the rotating block, and a plurality of arc-shaped grooves II are formed in the other side wall of the rotating block; the circumferential side wall of the positioning block is provided with a second arc-shaped convex plate, the other side wall of the positioning block is provided with a plurality of positioning columns, and the cross sections of the positioning columns are of semicircular structures.
Furthermore, in order to prevent sparks generated on the surface of the titanium alloy in the laser cladding process from splashing around, through the arrangement of the circular ring, gas entering the circular ring is discharged through the air outlet and forms an annular air curtain wall, so that the splashing of sparks can be prevented, the normal work of nearby workers is ensured, the heat of the titanium alloy after cladding can be dissipated, and the protection mechanism comprises an L-shaped connecting plate arranged at the bottom end of the piston rod; a laser is arranged in the middle of the bottom end of the horizontal section of the L-shaped connecting plate, a connecting pipe penetrates through the middle of the side wall of the vertical section of the L-shaped connecting plate, an air inlet pipe is arranged at one end of the connecting pipe, and a circular ring is arranged at one end, away from the air inlet pipe, of the connecting pipe; the side wall of the circumference outside the circular ring is provided with an air inlet matched with the air inlet pipe, the inside of the circular ring is provided with a cavity, and the top end of the cavity is provided with an arc-shaped structure; an annular partition plate is arranged inside the cavity, and an air outlet is formed in the bottom end of the cavity and close to the inner wall of the circular ring; the top of annular baffle sets up to the arc structure, and annular baffle sets up to one side in the cavity, and annular baffle reduces gradually towards the distance top-down of ring outer wall.
Preferably, the infrared thermal imager is used for collecting a cladding coating thermal image, and the thermal image is used for image enhancement, and the method specifically comprises the following steps:
step 1): enhancing histogram equalization;
step 2): carrying out white balance processing on the image with the enhanced homogenization, and taking the processed image as an input I;
step 3): performing self-adaptive correction on the input one in the step 2), smoothly adjusting each pixel point, improving the overall contrast of the image, and taking the processed image as an input two;
step 4): respectively calculating the weights of the hot area and the cold area, and carrying out normalization processing on the weights of the two areas; the hot area is a part with higher temperature in the processing process, and is a brighter area in the picture acquired by the infrared thermal imager, the cold area is a part with relatively lower temperature due to heat conduction and heat loss in the processing process, and is represented as a dark area in the picture acquired by the infrared thermal imager;
step 5) fusing the input I and the input II according to the weight after the normalization processing by using a multi-scale fusion strategy to obtain an enhanced image;
wherein, the normalization processing calculation formula is as follows:
in the formula (I), the compound is shown in the specification,
for the normalized weights, Wm(x, y) is the sum of the cold zone weight and the hot zone weight, WE(x, y) is the cold zone weight, Ws(x, y) is the hotspot weight;
by means of the technical scheme, the method and the device can achieve enhancement processing of the collected infrared image, and therefore characteristic information of the image can be obviously acquired.
The invention has the beneficial effects that:
1. the laser cladding device is reasonable and reliable in structure, simple and convenient to operate, and capable of rapidly and stably feeding the titanium alloy surface for laser cladding, so that the working efficiency of the cladding device for cladding the titanium alloy surface can be improved, the productivity can be further improved, and the production cost can be saved.
2. Through the setting of adjustment mechanism to can make titanium alloy's surface can carry out the ascending removal in horizontal and longitudinal direction when carrying out the laser cladding in-process, and then can guarantee that titanium alloy's surface can carry out the omnidirectional cladding, through the rotation of motor one and motor two, can make movable block one and movable block two remain stable at the removal in-process.
3. Through the setting of positioning mechanism to can make titanium alloy surface remain stable when cladding, can also carry out the centre gripping location to the titanium alloy of arbitrary shape, guarantee titanium alloy and cladding the stability of in-process, and then guarantee the titanium alloy surface and clad the quality after accomplishing, simultaneously, still improve the suitability that covers the device.
4. Through the setting of protection machanism to can avoid the titanium alloy surface to splash towards all around at the spark that carries out laser cladding's in-process production, through the setting of ring, make the gas that gets into the ring come out through the air outlet and can form annular air curtain wall one, and then can block splashing of spark, guarantee next door staff's normal work, can also carry out the thermal treatment to the titanium alloy after laser cladding accomplishes simultaneously.
5. The acquired infrared image is enhanced, so that the characteristic information of the image can be obviously acquired, and the defects and air holes in the cladding process can be monitored in real time and on line.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a laser cladding apparatus for titanium alloy surface modification according to an embodiment of the invention;
fig. 2 is a schematic structural diagram of an adjusting mechanism in a laser cladding device for titanium alloy surface modification according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of a positioning mechanism in a laser cladding apparatus for titanium alloy surface modification according to an embodiment of the invention;
FIG. 4 is a schematic structural diagram of a follower block in a laser cladding apparatus for titanium alloy surface modification according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a rotating block in a laser cladding apparatus for modifying a titanium alloy surface according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a positioning block in a laser cladding device for titanium alloy surface modification according to an embodiment of the invention;
fig. 7 is a schematic structural diagram of a protection mechanism in a laser cladding apparatus for titanium alloy surface modification according to an embodiment of the invention;
fig. 8 is a cross-sectional view of an air inlet pipe, a connecting pipe and a ring in a laser cladding apparatus for titanium alloy surface modification according to an embodiment of the present invention.
In the figure:
1. a fixing plate; 2. supporting legs; 3. a support plate; 4. an adjustment mechanism; 401. a first support plate; 402. a first motor; 403. a first threaded rod; 404. moving a first block; 4041. a long plate; 4042. a limiting groove; 405. a second support plate; 406. a second motor; 407. a second threaded rod; 408. a second moving block; 4081. a long rod; 4082. a slider; 4083. a limiting block; 5. a positioning mechanism; 501. a positioning frame; 5011. a sliding groove; 5012. a third motor; 5013. a third threaded rod; 502. a driven block; 5021. a first arc-shaped groove; 5022. connecting blocks; 5023. a third threaded hole; 503. rotating the block; 5031. a first arc-shaped convex plate; 5032. a second arc-shaped groove; 504. positioning blocks; 5041. a second arc-shaped convex plate; 5042. a positioning column; 6. a support frame; 7. a hydraulic cylinder; 8. a piston rod; 9. a protection mechanism; 901. an L-shaped connecting plate; 902. a laser; 903. a connecting pipe; 904. an air inlet pipe; 905. a circular ring; 9051. an air inlet; 9052. a chamber; 9053. an annular partition plate; 9054. an air outlet; 10. a control panel.
Detailed Description
For further explanation of the various embodiments, the drawings which form a part of the disclosure and which are incorporated in and constitute a part of this specification, illustrate embodiments and, together with the description, serve to explain the principles of operation of the embodiments, and to enable others of ordinary skill in the art to understand the various embodiments and advantages of the invention, and, by reference to these figures, reference is made to the accompanying drawings, which are not to scale and wherein like reference numerals generally refer to like elements.
According to the embodiment of the invention, the laser cladding device for titanium alloy surface modification is provided.
Referring to the drawings and the detailed description, the invention will be further described, as shown in fig. 1, a laser cladding apparatus for titanium alloy surface modification according to an embodiment of the invention includes a fixing plate 1, wherein a plurality of supporting legs 2 are arranged at the top end of the fixing plate 1, a supporting plate 3 is arranged at the top end of each supporting leg 2, an adjusting mechanism 4 is arranged at the top end of each supporting plate 3, and a positioning mechanism 5 is arranged at the top end of each adjusting mechanism 4; a supporting frame 6 is arranged on one side of the top end of the fixed plate 1, the cross section of the supporting frame 6 is set to be an L-shaped structure, a hydraulic cylinder 7 is arranged at one end of the top end of the supporting frame 6, a piston rod 8 is arranged at the bottom end of the hydraulic cylinder 7, and the bottom end of the piston rod 8 penetrates through the bottom end of the supporting frame 6 and is provided with a protection mechanism 9; an infrared thermal imager (not shown) is disposed at a position of the support frame 6 facing the laser processing head, a control panel 10 is disposed on a side wall of the support frame 6 (in addition, when the laser processing head is used specifically, a PLC controller is included in the control panel 10 for the control panel 10), and the adjusting mechanism 4, the positioning mechanism 5, the hydraulic cylinder 7, the infrared thermal imager and the protection mechanism 9 are sequentially electrically connected to the control panel 10.
By means of the technical scheme, the device is reasonable and reliable in structure, simple and convenient to operate, and capable of rapidly and stably feeding the titanium alloy surface for mechanism cladding, so that the working efficiency of a cladding device for cladding the titanium alloy surface can be improved, the productivity can be improved, and the production cost can be saved.
As shown in fig. 1-2, in one embodiment, for the adjusting mechanism 4, the adjusting mechanism 4 includes two symmetrical supporting plates one 401 disposed on one side of the top end of the supporting plate 3, wherein one end of one supporting plate one 401 is provided with a motor one 402 (in addition, in a specific application, an output shaft of the motor one 402 is connected with the supporting plate one 401 through a bearing); the output end of the first motor 402 penetrates through the side wall of one of the first support plates 401 and is provided with a first threaded rod 403, one end, far away from the first motor 402, of the first threaded rod 403 is connected with the side wall of the other first support plate 401 through a bearing, and a first moving block 404 is sleeved on the circumferential side wall of the first threaded rod 403; the adjusting mechanism 4 further comprises two symmetrical second supporting plates 405 which are arranged at the top end of the supporting plate 3 and located at the adjacent side of the first supporting plate 401, wherein one side of one second supporting plate 405 is provided with a second motor 406 (in addition, in a specific application, an output shaft of the second motor 406 is connected with the second supporting plate 405 through a bearing); the output end of the second motor 406 penetrates through the side wall of one of the second support plates 405 and is provided with a second threaded rod 407, one end, far away from the second motor 406, of the second threaded rod 407 is connected with the side wall of the other second support plate 405 through a bearing, and a second moving block 408 is sleeved on the circumferential side wall of the second threaded rod 407; a first threaded hole matched with the first threaded rod 403 is formed in the side wall of one end of the first moving block 404, a long plate 4041 is arranged on one side wall of the first moving block 404, and a limit groove 4042 is formed in the top end of the long plate 4041; threaded hole two with two 407 matched with of threaded rod is seted up to the one end lateral wall of movable block two 408, a lateral wall of movable block two 408 is provided with stock 4081, the circumference lateral wall cover of stock 4081 is equipped with sliding block 4082, and the top of sliding block 4082 is provided with spacing block 4083 with spacing groove 4042 matched with, thereby can make the surface of titanium alloy can carry out horizontal and ascending removal in the longitudinal direction when carrying out the laser cladding in-process, and then can guarantee that the surface of titanium alloy can carry out the omnidirectional cladding, rotation through motor 402 and motor two 406, can make movable block 404 and movable block two 408 remain stable in the removal process.
The operating principle of the adjusting mechanism 4 is as follows: when the titanium alloy needs to move transversely, the control panel 10 starts the second motor 406, the second threaded rod 407 is driven to rotate by the output shaft of the second motor 406, and the second movable block 408 is driven to move transversely under the matching of the second threaded rod 407 and the second threaded hole, so that the long rod 4081, the sliding block 4082 and the limiting block 4083 are driven to move transversely, and the titanium alloy is driven to move transversely;
when the titanium alloy needs to move longitudinally, the control panel 10 starts the first motor 402, the first threaded rod 403 is driven to rotate through the output shaft of the first motor 402, and the first movable block 404 is driven to move transversely under the matching of the first threaded rod 403 and the first threaded hole, so that the long plate 4041, the sliding block 4082 and the limiting block 4083 are driven to move longitudinally, and the titanium alloy is driven to move longitudinally.
As shown in fig. 1 and fig. 3 to 6, in an embodiment, for the positioning mechanism 5, the positioning mechanism 5 includes a positioning frame 501 provided with a top end of a limiting block 4083, two ends of the top end of the positioning frame 501 are provided with symmetrical driven blocks 502, one side of the driven block 502 is provided with a rotating block 503, and one side of the rotating block 503 is provided with a plurality of positioning blocks 504; the middle of the top end of the positioning frame 501 is provided with a sliding groove 5011, the side wall of one end of the positioning frame 501 is provided with a motor three 5012, an output shaft of the motor three 5012 penetrates through the side wall of the positioning frame 501 and is provided with a threaded rod three 5013, and one end, far away from the motor three 5012, of the threaded rod three 5013 is connected with the inner side wall of the sliding groove 5011 through a bearing; an arc groove I5021 is formed in one side wall of the driven block 502, a connecting block 5022 matched with the sliding groove 5011 is arranged at the bottom end of the driven block 502, and a threaded hole III 5023 matched with a threaded rod III 5013 is formed in the middle of one side wall of the connecting block 5022; the outer side of the circumferential side wall of the rotating block 503 is provided with a first arc-shaped convex plate 5031 matched with the first arc-shaped groove 5021, and the other side wall of the rotating block 503 is provided with a plurality of second arc-shaped grooves 5032; the circumference lateral wall of locating piece 504 is provided with two 5041 of arc flange, another lateral wall of locating piece 504 is provided with a plurality of reference column 5042 (in addition, when concrete application, the material of above-mentioned reference column 5042 sets up to elastic silica gel material), and the cross section of reference column 5042 sets up to semi-circular structure, thereby can make titanium alloy surface remain stable when cladding, can also carry out the centre gripping location to the titanium alloy of arbitrary shape, titanium alloy stability at cladding in-process has been guaranteed, and then guaranteed the titanium alloy surface and clad the quality after accomplishing, and simultaneously, the suitability of cladding the device has still been improved.
The working principle of the positioning mechanism 5 is as follows: firstly, the titanium alloy to be processed is placed in the middle of the top end of the positioning frame 501, then the motor 5012 is started, the output shaft of the motor 5012 drives the threaded rod 5013 to rotate, the threaded rod 5013 is matched with the threaded hole 5023, so that the two driven blocks 502 move towards the middle of the positioning frame 501, when the positioning block 504 contacts the irregular titanium alloy, the positioning block 504 and the rotating block 503 are driven to rotate, the non-contact positioning block 504 can continuously abut against the titanium alloy, and the titanium alloy can be clamped and positioned.
As shown in fig. 1 and 7-8, in one embodiment, for the guard mechanism 9, the guard mechanism 9 includes an L-shaped connecting plate 901 disposed at the bottom end of the piston rod 8; a laser 902 is arranged in the middle of the bottom end of the horizontal section of the L-shaped connecting plate 901, a connecting pipe 903 penetrates through the middle of the side wall of the vertical section of the L-shaped connecting plate 901, an air inlet pipe 904 is arranged at one end of the connecting pipe 903 (in specific application, the conveying gas of the air inlet pipe 904 can be selected as inert gas), and a circular ring 905 is arranged at one end of the connecting pipe 903 away from the air inlet pipe 904; an air inlet 9051 matched with the air inlet pipe 904 is formed in the side wall of the outer circumference of the circular ring 905, a cavity 9052 is formed in the circular ring 905, and an arc-shaped structure is arranged at the top end of the cavity 9052; an annular partition board 9053 is arranged inside the chamber 9052, and an air outlet 9054 is formed in the bottom end of the chamber 9052 and close to the inner wall of the circular ring 905; the top of annular baffle 9053 sets up to the arc structure, and annular baffle 9053 sets up in cavity 9052 the slope, annular baffle 9053 reduces gradually towards the distance top-down of ring 905 outer wall, thereby can avoid the titanium alloy surface to splash towards all around at the spark that carries out laser cladding's in-process production, setting through ring 905, make the gas that gets into ring 905 come out and can form annular air curtain wall one through air outlet 9054, and then can block splashing of spark, guarantee next door staff's normal work, can also carry out the thermal treatment to the titanium alloy after the laser cladding is accomplished simultaneously.
The working principle of the protection mechanism 9 is as follows: through the inside gas that dashes into of intake pipe 904 connecting pipe 903, then inside gaseous entering ring 905 through air intake 9051 for gaseous from air outlet 9054 outflow, and then can form an annular wind curtain wall under the effect of annular baffle 9053.
Further, the infrared thermal imager is used for collecting a cladding coating thermal image, and the thermal image is used for image enhancement, and the method specifically comprises the following steps:
step 1): enhancing histogram equalization;
step 2): carrying out white balance processing on the image with the enhanced homogenization, and taking the processed image as an input I;
step 3): performing self-adaptive correction on the input one in the step 2), smoothly adjusting each pixel point, improving the overall contrast of the image, and taking the processed image as an input two;
step 4): respectively calculating the weights of the hot area and the cold area, and carrying out normalization processing on the weights of the two areas; the hot area is a part with higher temperature in the processing process, and is a brighter area in the picture acquired by the infrared thermal imager, the cold area is a part with relatively lower temperature due to heat conduction and heat loss in the processing process, and is represented as a dark area in the picture acquired by the infrared thermal imager;
step 5) fusing the input I and the input II according to the weight after the normalization processing by using a multi-scale fusion strategy to obtain an enhanced image;
wherein, the normalization processing calculation formula is as follows:
in the formula (I), the compound is shown in the specification,
for the normalized weights, Wm(x, y) is the sum of the cold zone weight and the hot zone weight, WE(x, y) is the cold zone weight, Ws(x, y) is the hotspot weight;
by means of the technical scheme, the method and the device can achieve enhancement processing of the collected infrared image, and therefore characteristic information of the image can be obviously acquired.
For the convenience of understanding the technical solutions of the present invention, the working principle or the operation mode of the present invention in the practical process will be described in detail below.
In practical application, firstly, titanium alloy to be processed is placed in the middle of the top end of the positioning frame 501, then the motor 5012 is started, the output shaft of the motor 5012 drives the threaded rod 5013 to rotate, the threaded rod 5013 is matched with the threaded hole tris5023, so that the two driven blocks 502 move towards the middle of the positioning frame 501, when the positioning block 504 contacts irregular titanium alloy, the positioning block 504 and the rotating block 503 are driven to rotate, the positioning block 504 which is not contacted can continuously abut against the titanium alloy, the titanium alloy can be clamped and positioned, then gas is injected into the connecting pipe 903 through the gas inlet pipe 904, then the gas enters the circular ring 905 through the gas inlet 9051, under the action of the annular partition 9053, the gas flows out from the gas outlet 9054, an annular wind curtain wall can be formed, then the hydraulic cylinder 7 is started through the control panel 10, and the piston rod 8 is driven to move downwards, further driving the laser 902 to move downwards, and then starting the laser 902 through the control panel 10 to perform laser cladding on the surface of the titanium alloy;
when the titanium alloy needs to move transversely, the control panel 10 starts the second motor 406, the second threaded rod 407 is driven to rotate by the output shaft of the second motor 406, and the second movable block 408 is driven to move transversely under the matching of the second threaded rod 407 and the second threaded hole, so that the long rod 4081, the sliding block 4082 and the limiting block 4083 are driven to move transversely, and the titanium alloy is driven to move transversely;
when the titanium alloy needs to move longitudinally, the control panel 10 starts the first motor 402, the first threaded rod 403 is driven to rotate through the output shaft of the first motor 402, and the first movable block 404 is driven to move transversely under the matching of the first threaded rod 403 and the first threaded hole, so that the long plate 4041, the sliding block 4082 and the limiting block 4083 are driven to move longitudinally, and the titanium alloy is driven to move longitudinally.
In conclusion, by means of the technical scheme, the laser cladding device is reasonable and reliable in structure, simple and convenient to operate, and capable of rapidly and stably feeding the titanium alloy surface for laser cladding, so that the working efficiency of the cladding device for cladding the titanium alloy surface can be improved, the productivity can be improved, and the production cost can be saved; through the arrangement of the adjusting mechanism 4, the surface of the titanium alloy can move in the transverse and longitudinal directions during the laser cladding process, so that the surface of the titanium alloy can be subjected to omnibearing cladding, and the first moving block 404 and the second moving block 408 can be kept stable during the moving process through the rotation of the first motor 402 and the second motor 406; by arranging the positioning mechanism 5, the surface of the titanium alloy can be kept stable during cladding, the titanium alloy in any shape can be clamped and positioned, the stability of the titanium alloy in the cladding process is ensured, the quality of the titanium alloy surface after cladding is finished is further ensured, and meanwhile, the applicability of the cladding device is improved; through the setting of protection machanism 9 to can avoid the titanium alloy surface to splash towards all around in-process that carries out laser cladding to produce, through the setting of ring 905, make the gas that gets into ring 905 come out and can form annular air curtain wall one through air outlet 9054, and then can block splashing of spark, guarantee next door staff's normal work, can also carry out the thermal treatment to the titanium alloy after laser cladding accomplishes simultaneously.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The utility model provides a titanium alloy surface modification is with laser cladding device, includes fixed plate (1), its characterized in that:
the top end of the fixing plate (1) is provided with a plurality of supporting legs (2), the top ends of the supporting legs (2) are provided with supporting plates (3), the top end of each supporting plate (3) is provided with an adjusting mechanism (4), and the top end of each adjusting mechanism (4) is provided with a positioning mechanism (5);
a supporting frame (6) is arranged on one side of the top end of the fixing plate (1), the cross section of the supporting frame (6) is of an L-shaped structure, a hydraulic cylinder (7) is arranged at one end of the top end of the supporting frame (6), a piston rod (8) is arranged at the bottom end of the hydraulic cylinder (7), and the bottom end of the piston rod (8) penetrates through the bottom end of the supporting frame (6) and is provided with a protection mechanism (9);
an infrared thermal imager is arranged at the position, opposite to the laser processing head, of the support frame (6), a control panel (10) is arranged on one side wall of the support frame (6), and the adjusting mechanism (4), the positioning mechanism (5), the hydraulic cylinder (7), the infrared thermal imager and the protection mechanism (9) are electrically connected with the control panel (10);
the adjusting mechanism (4) comprises two symmetrical first supporting plates (401) arranged on one side of the top end of the supporting plate (3), and one end of one first supporting plate (401) is provided with a first motor (402);
the output end of the first motor (402) penetrates through the side wall of one of the first support plates (401) and is provided with a first threaded rod (403), one end, far away from the first motor (402), of the first threaded rod (403) is connected with the side wall of the other first support plate (401) through a bearing, and a first moving block (404) is sleeved on the circumferential side wall of the first threaded rod (403);
the adjusting mechanism (4) further comprises two symmetrical second supporting plates (405) which are arranged at the top ends of the supporting plates (3) and located on one adjacent side of the first supporting plate (401), and one side of one second supporting plate (405) is provided with a second motor (406);
the output end of the second motor (406) penetrates through the side wall of one of the second support plates (405) and is provided with a second threaded rod (407), one end, far away from the second motor (406), of the second threaded rod (407) is connected with the side wall of the other second support plate (405) through a bearing, and a second moving block (408) is sleeved on the circumferential side wall of the second threaded rod (407).
2. The laser cladding device for titanium alloy surface modification according to claim 1, wherein a first threaded hole matched with the first threaded rod (403) is formed in a side wall of one end of the first moving block (404), a long plate (4041) is arranged on a side wall of the first moving block (404), and a limit groove (4042) is formed in a top end of the long plate (4041).
3. The laser cladding device for titanium alloy surface modification according to claim 1 or 2, wherein a second threaded hole matched with the second threaded rod (407) is formed in a side wall of one end of the second moving block (408), a long rod (4081) is arranged on a side wall of the second moving block (408), a sliding block (4082) is sleeved on a circumferential side wall of the long rod (4081), and a limit block (4083) matched with the limit groove (4042) is arranged at the top end of the sliding block (4082).
4. The laser cladding device for titanium alloy surface modification according to any one of claims 1 to 3, wherein the positioning mechanism (5) comprises a positioning frame (501) provided with a top end of the limiting block (4083), two ends of the top end of the positioning frame (501) are provided with symmetrical driven blocks (502), one side of each driven block (502) is provided with a rotating block (503), and one side of each rotating block (503) is provided with a plurality of positioning blocks (504);
sliding groove (5011) has been seted up at the top middle part of locating rack (501), the one end lateral wall of locating rack (501) is provided with motor three (5012), just the output shaft of motor three (5012) runs through the lateral wall of locating rack (501) and is provided with threaded rod three (5013), just threaded rod three (5013) are kept away from the one end of motor three (5012) with the inside lateral wall of sliding groove (5011) passes through the bearing and connects.
5. The laser cladding device for titanium alloy surface modification according to any one of claims 1 to 4, wherein an arc-shaped groove I (5021) is formed in one side wall of the driven block (502), a connecting block (5022) matched with the sliding groove (5011) is arranged at the bottom end of the driven block (502), and a threaded hole III (5023) matched with the threaded rod III (5013) is formed in the middle of one side wall of the connecting block (5022).
6. The laser cladding device for titanium alloy surface modification according to claim 5, wherein a first arc-shaped convex plate (5031) matched with the first arc-shaped groove (5021) is arranged on the outer side of the circumferential side wall of the rotating block (503), and a plurality of second arc-shaped grooves (5032) are formed in the other side wall of the rotating block (503).
7. The laser cladding device for titanium alloy surface modification according to claim 1, wherein a second arc-shaped convex plate (5041) is disposed on a circumferential side wall of the positioning block (504), a plurality of positioning posts (5042) are disposed on the other side wall of the positioning block (504), and a cross section of each positioning post (5042) is a semicircular structure.
8. The laser cladding device for titanium alloy surface modification according to claim 2 or 4, wherein the shielding mechanism (9) comprises an L-shaped connecting plate (901) arranged at the bottom end of the piston rod (8);
the laser device (902) is arranged in the middle of the bottom end of the horizontal section of the L-shaped connecting plate (901), a connecting pipe (903) penetrates through the middle of the side wall of the vertical section of the L-shaped connecting plate (901), an air inlet pipe (904) is arranged at one end of the connecting pipe (903), and a circular ring (905) is arranged at one end, far away from the air inlet pipe (904), of the connecting pipe (903).
9. The laser cladding device for titanium alloy surface modification according to claim 1, wherein an air inlet (9051) matched with the air inlet pipe (904) is formed in the side wall of the outer circumference of the circular ring (905), a cavity (9052) is formed in the circular ring (905), and an arc-shaped structure is arranged at the top end of the cavity (9052);
an annular partition plate (9053) is arranged inside the cavity (9052), and an air outlet (9054) is formed in the bottom end of the cavity (9052) and close to the inner wall of the circular ring (905);
the top end of the annular partition plate (9053) is of an arc-shaped structure, the annular partition plate (9053) is obliquely arranged in the cavity (9052), and the distance from the annular partition plate (9053) to the outer wall of the circular ring (905) is gradually reduced from top to bottom.
10. The laser cladding apparatus for modifying the surface of a titanium alloy according to claim 1, wherein: the infrared thermal imager is used for collecting cladding coating thermal images, and the thermal images are used for image enhancement, and the method specifically comprises the following steps:
step 1): enhancing histogram equalization;
step 2): carrying out white balance processing on the image with the enhanced homogenization, and taking the processed image as an input I;
step 3): performing self-adaptive correction on the input one in the step 2), smoothly adjusting each pixel point, improving the overall contrast of the image, and taking the processed image as an input two;
step 4): respectively calculating the weights of the hot area and the cold area, and carrying out normalization processing on the weights of the two areas; the hot area is a part with higher temperature in the processing process, and is a brighter area in the picture acquired by the infrared thermal imager, the cold area is a part with relatively lower temperature due to heat conduction and heat loss in the processing process, and is represented as a dark area in the picture acquired by the infrared thermal imager;
step 5) fusing the input I and the input II according to the weight after the normalization processing by using a multi-scale fusion strategy to obtain an enhanced image;
wherein, the normalization processing calculation formula is as follows:
in the formula (I), the compound is shown in the specification,
for the normalized weights sought, Wm(x, y) is the sum of the cold zone weight and the hot zone weight, WE(x, y) is the cold zone weight, Ws(x, y) is the hotspot weight;
by means of the technical scheme, the method and the device can achieve enhancement processing of the collected infrared image, and therefore characteristic information of the image can be obviously acquired.
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Application publication date: 20220624 Assignee: Jiangsu Jiangan Precision Mould Co.,Ltd. Assignor: Jiangsu electronic information Vocational College Contract record no.: X2023980052417 Denomination of invention: A Laser Cladding Device for Surface Modification of Titanium Alloy Granted publication date: 20230915 License type: Common License Record date: 20231218 |