A detection and repair device for plasma arc wire additive manufacturing

Abstract

The application relates to the technical field of additive manufacturing, and particularly relates to a detection and repair device for plasma arc wire additive manufacturing, which comprises a controller, a detection mechanism, a repair mechanism and a hammering mechanism, the bottom of the detection mechanism is provided with a base plate, the detection mechanism comprises a laser ranging sensor, a screw sliding table, an annular guide rail and a rotating assembly, the repair mechanism comprises a spray head, a storage tank, a laser generator, an extrusion assembly, an angle adjusting assembly and a smearing assembly, the hammering mechanism comprises a conical hammer block, a transmission assembly and a pressing assembly, the detection and repair device for plasma arc wire additive manufacturing can achieve the effect of synchronously detecting the size defects of a workpiece while the workpiece is printed by a welding torch, and the outer contour of the printed circular workpiece is detected from bottom to top in sequence by the screw sliding table, so that the detection efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of additive manufacturing, in particular to a detection and repair device for plasma arc wire additive manufacturing. BACKGROUND

[0002] In the additive manufacturing process, due to the melting and solidification of the material, the size of the part is easy to deviate due to factors such as temperature change and material shrinkage, and the main reason for this defect is that the thermal expansion coefficient of the material does not match, the melting temperature changes greatly or the process parameters are not set properly, etc. Since the additive manufacturing equipment is generally a three-axis machining method, it is straight and easy to print square workpieces, but when printing circular workpieces, the above problems are particularly obvious, so it is not possible to effectively guarantee the roundness of the circular workpiece.

[0003] The existing plasma additive manufacturing equipment cannot simultaneously detect the size of the circular workpiece forming layer while printing the circular workpiece, and it is even more impossible to repair in time when defects are detected, thereby reducing the size precision and surface quality of the formed workpiece. SUMMARY

[0004] The purpose of the present application is to provide a detection and repair device for plasma arc wire additive manufacturing, which solves the problem that the existing additive manufacturing equipment cannot simultaneously detect the size of the workpiece while printing the workpiece.

[0005] To achieve this purpose, the present application adopts the following technical solutions:

[0006] The application provides a detection and repair device for plasma arc wire additive manufacturing, which comprises a controller, a detection mechanism, a repair mechanism and a hammering mechanism. The bottom of the detection mechanism is provided with a base plate. The detection mechanism comprises a laser ranging sensor, a lead screw sliding table, an annular guide rail and a rotating assembly. The annular guide rail is fixedly arranged on the top of the base plate. The rotating assembly is arranged on the top of the base plate. The lead screw sliding table is fixedly arranged on the top of the rotating assembly through two connecting rods. A sliding plate is slidably arranged on the outer wall of the lead screw sliding table. An L-shaped plate is fixedly arranged on the outer wall of the sliding plate. The laser ranging sensor is fixedly arranged on the bottom outer wall of the L-shaped plate. The repair mechanism is arranged on the outer wall of the L-shaped plate. The repair mechanism comprises a spray head, a storage tank, a laser generator, an extrusion assembly, an angle adjusting assembly and a smearing assembly. A support plate is fixedly arranged on the outer wall of the L-shaped plate. A hinged seat is fixedly arranged on the top of the support plate. A hinged shaft is arranged on the hinged seat. A hinged block is fixedly arranged on the outer wall of the hinged shaft. The spray head and the laser generator are fixedly arranged on the hinged block. The angle adjusting assembly is arranged between the hinged seat and the hinged shaft. A support frame is fixedly arranged on the top of the L-shaped plate. The storage tank is fixedly arranged on the support frame. The extrusion assembly is inserted into the storage tank. The smearing assembly is arranged on the L-shaped plate. The hammering mechanism is arranged on the outer wall of the L-shaped plate. The hammering mechanism comprises a conical hammer block, a transmission assembly and a pressing assembly. An installation plate is fixedly arranged on the side wall of the hinged block. The pressing assembly is arranged on the installation plate. The transmission assembly is arranged between the hinged shaft and the pressing assembly. The conical hammer block is fixedly arranged on the pressing assembly. The laser generator, the laser ranging sensor, the rotating assembly, the extrusion assembly, the angle adjusting assembly and the smearing assembly are electrically connected with the controller.

[0007] Further, the rotating assembly comprises a stepping motor, a cylindrical gear and a toothed ring. The stepping motor is fixedly arranged on the top of the base plate. The cylindrical gear is fixedly arranged on the output end of the stepping motor. The toothed ring is rotatably arranged on the top of the annular guide rail. The cylindrical gear is in meshing connection with the toothed ring. The lead screw sliding table is fixedly connected with the top ends of the two connecting rods. The stepping motor is electrically connected with the controller.

[0008] Further, the extrusion assembly comprises a servo motor, a pressing plate, an extrusion rod, a first connecting rod and a second connecting rod. The servo motor is fixedly arranged on the top of the L-shaped plate. The first connecting rod is fixedly arranged on the output end of the servo motor. The pressing plate is slidably arranged on the outer wall of the support frame through two guide rods. The extrusion rod is inserted into the storage tank. The top end of the extrusion rod is fixedly connected with the bottom of the pressing plate. The second connecting rod is hingedly arranged between the end, away from the servo motor, of the first connecting rod and the pressing plate. The extrusion rod is sleeved with an extension spring. The top of the storage tank and the bottom of the pressing plate are respectively in abutment with the two ends of the extension spring. The bottom of the storage tank is provided with a discharge port. The discharge port and the spray head are fixedly provided with a high-temperature-resistant hose therebetween. The servo motor is electrically connected with the controller.

[0009] Further, the angle adjusting assembly comprises a micro motor, a first driving wheel, a first driven wheel and a first belt, the micro motor is fixedly arranged on the outer wall of the hinge seat, the first driving wheel is fixedly arranged on the output end of the micro motor, the first driven wheel is fixedly arranged on one end of the hinge shaft, the first belt is sleeved between the first driving wheel and the first driven wheel, and the first driving wheel is smaller than the first driven wheel, and the micro motor is electrically connected with the controller.

[0010] Further, the troweling assembly comprises an electric push rod, a sliding rail, a sliding block and a troweling roller, the sliding rail is fixedly arranged on the outer wall of one end of the L-shaped plate close to the tooth ring, the sliding block is slidingly arranged on the top of the sliding rail, the electric push rod is inserted into the other end of the L-shaped plate, the output end of the electric push rod is fixedly connected with the sliding block, the top of the sliding block is fixedly provided with a mounting block, the outer wall of the mounting block is fixedly provided with a inserting rod and two limiting rods, a mounting frame is sleeved between the inserting rod and the two limiting rods, the troweling roller is rotatably arranged on the end of the mounting frame away from the inserting rod, and the electric push rod is electrically connected with the controller.

[0011] Further, the transmission assembly comprises a first bevel gear, a second bevel gear, a second driving wheel, a second driven wheel and a second belt, the first bevel gear is fixedly arranged on the end of the hinge shaft away from the first driven wheel, the outer wall of the mounting plate is fixedly provided with a first rotating shaft and a second rotating shaft, respectively, the second bevel gear and the second driving wheel are fixedly arranged on the bottom end and the top end of the first rotating shaft, respectively, the second bevel gear is larger than the first bevel gear, the first bevel gear and the second bevel gear are in meshing connection, the second driven wheel is fixedly arranged on the top end of the second rotating shaft, and the second belt is sleeved between the second driving wheel and the second driven wheel.

[0012] Further, the pressing assembly comprises a wedge-shaped rotating table, a ball, a return spring and a lifting rod, the outer wall of the mounting plate is fixedly provided with two limiting blocks, the lifting rod is slidingly arranged between the two limiting blocks, the top of the lifting rod is fixedly provided with a flange, the ball is rotatably arranged on the top end of the lifting rod, the return spring is sleeved on the outer wall of the upper half of the lifting rod, the wedge-shaped rotating table is fixedly arranged on the bottom end of the second rotating shaft, the ball is in abutment with the bottom of the wedge-shaped rotating table, the conical hammer block is fixedly connected with the bottom end of the lifting rod, and the bottom of the flange and the top of the limiting block close to the ball are in abutment with the two ends of the return spring, respectively.

[0013] Further, the bottom of the conical hammer block is fixedly provided with a rubber head.

[0014] Further, the outer wall of the inserting rod is sleeved with a buffer spring, and the outer wall of the mounting frame and the outer wall of the mounting block are in abutment with the two ends of the buffer spring, respectively.

[0015] Further, the outer wall of the hinge block is fixedly provided with a high-definition camera, and the high-definition camera is electrically connected with the controller.

[0016] The beneficial effects of the present application are as follows:

[0017] 1. The present application is realized by designing detection mechanism, i.e. laser ranging sensor, screw slide, ring guide rail and rotating assembly, through rotating assembly driving laser ranging sensor rotation, realizing automatic following of welding gun, so that while welding gun prints workpiece, the effect of synchronous detection of workpiece size defects is achieved, and the periphery of the printed circular workpiece is detected from bottom to top in turn, avoiding omission and improving detection efficiency.

[0018] 2. The present application is realized by designing repair mechanism, i.e. including spray head, storage tank, laser generator, extrusion assembly and angle adjusting assembly, when detecting that there is a pit on the surface of the workpiece, the hot melt metal powder in the storage tank can be extruded by the extrusion assembly to repair the pit, and when detecting that there is a hump on the surface of the workpiece, the hump is hot melted and reshaped by the laser emitter, compared with the prior art, different repair measures can be taken in real time for different size problems generated in the printing process of the circular workpiece, thereby improving the practicability of the device. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings in the embodiments of the present application are briefly introduced as follows.

[0020] Figure 1 is a schematic view of the three-dimensional structure of the present application Figure 1 ;

[0021] Figure 2 is an enlarged view of A in Figure 1 ;

[0022] Figure 3 is an enlarged view of B in Figure 1 ;

[0023] Figure 4 is a schematic view of the three-dimensional structure of the present application Figure 2 ;

[0024] Figure 5 is an enlarged view of C in Figure 4 ;

[0025] Figure 6 is an enlarged view of D in Figure 4 ;

[0026] Figure 7 is a schematic view of the plane structure of the present application Figure 1 ;

[0027] Figure 8 is an enlarged view of E in Figure 7 ;

[0028] Figure 9 is a schematic view of the plane structure of the present application Figure 2 ;

[0029] Figure 10 is Figure 9 enlarged view of F in FIG. 1;

[0030] Figure 11 is a schematic view of the present application without the substrate, the circular guide rail and the rotating assembly;

[0031] Figure 12 is Figure 11 enlarged view of G in FIG. 1;

[0032] in the figure:

[0033] the detection mechanism 1,

[0034] the laser ranging sensor 10,

[0035] the screw slide 11, the slide plate 110, the L-shaped plate 111

[0036] the circular guide rail 12,

[0037] the rotating assembly 13, the stepper motor 130, the cylindrical gear 131, the gear ring 132,

[0038] the repair mechanism 2,

[0039] the spray head 20, the high-temperature-resistant hose 200,

[0040] the storage tank 21,

[0041] the laser generator 22,

[0042] the extrusion assembly 23, the servo motor 230, the pressing plate 231, the extrusion rod 232, the first connecting rod 233, the second connecting rod 234, the extension spring 235,

[0043] the angle adjustment assembly 24, the micro motor 240, the first driving wheel 241, the first driven wheel 242, the first belt 243,

[0044] the smoothing assembly 25, the electric push rod 250, the slide rail 251, the sliding block 252, the smoothing roller 253, the insertion rod 254, the buffer spring 255,

[0045] the high-definition camera 26,

[0046] the hammering mechanism 3,

[0047] the conical hammer block 30, the rubber head 300,

[0048] the transmission assembly 31, the first bevel gear 310, the second bevel gear 311, the second driving wheel 312, the second driven wheel 313, the second belt 314,

[0049] Pressing assembly 32, wedge-shaped turntable 320, ball 321, return spring 322, lifting rod 323, flange 324,

[0050] Base plate 4. DETAILED DESCRIPTION

[0051] The technical solutions of the present application will be further described below in combination with the drawings and through specific embodiments.

[0052] Wherein, the drawings are only used for exemplary illustration, and the representation is only a schematic diagram, not a physical diagram, and cannot be understood as a limitation on the present patent; in order to better illustrate the embodiments of the present application, some components of the drawings will be omitted, enlarged or reduced, and do not represent the actual product size.

[0053] Referring to Figures 1 to 12 As shown in the figure, a detection and repair device for plasma arc wire additive manufacturing includes a controller, a detection mechanism 1, a repair mechanism 2 and a hammering mechanism 3;

[0054] The bottom of the detection mechanism 1 is provided with a base plate 4, the detection mechanism 1 includes a laser ranging sensor 10, a lead screw sliding table 11, an annular guide rail 12 and a rotating assembly 13, the annular guide rail 12 is fixedly arranged on the top of the base plate 4, the rotating assembly 13 is arranged on the top of the base plate 4, the lead screw sliding table 11 is fixedly arranged on the top of the rotating assembly 13 through two connecting rods, a sliding plate 110 is slidably arranged on the outer wall of the lead screw sliding table 11, an L-shaped plate 111 is fixedly arranged on the outer wall of the sliding plate 110, and the laser ranging sensor 10 is fixedly arranged on the bottom outer wall of the L-shaped plate 111;

[0055] The repair mechanism 2 is arranged on the outer wall of the L-shaped plate 111, the repair mechanism 2 includes a spray head 20, a storage tank 21, a laser generator 22, an extrusion assembly 23, an angle adjusting assembly 24 and a smearing assembly 25, a support plate is fixedly arranged on the outer wall of the L-shaped plate 111, a hinge seat is fixedly arranged on the top of the support plate, a hinge shaft is arranged on the hinge seat, a hinge block is fixedly arranged on the outer wall of the hinge shaft, the spray head 20 and the laser generator 22 are both fixedly arranged on the hinge block, the angle adjusting assembly 24 is arranged between the hinge seat and the hinge shaft, a support frame is fixedly arranged on the top of the L-shaped plate 111, the storage tank 21 is fixedly arranged on the support frame, the extrusion assembly 23 is inserted on the storage tank 21, and the smearing assembly 25 is arranged on the L-shaped plate 111;

[0056] The hammering mechanism 3 is arranged on the outer wall of the L-shaped plate 111, and the hammering mechanism 3 comprises a conical hammer block 30, a transmission assembly 31 and a pressing assembly 32. The side wall of the hinged block is fixedly provided with a mounting plate, the pressing assembly 32 is arranged on the mounting plate, the transmission assembly 31 is arranged between the hinged shaft and the pressing assembly 32, and the conical hammer block 30 is fixedly arranged on the pressing assembly 32. The laser generator 22, the laser ranging sensor 10, the rotating assembly 13, the extruding assembly 23, the angle adjusting assembly 24 and the smoothing assembly 25 are all electrically connected with the controller.

[0057] Referring to Figure 2 The rotating assembly 13 comprises a stepping motor 130, a cylindrical gear 131 and a toothed ring 132. The stepping motor 130 is fixedly arranged on the top of the base plate 4, the cylindrical gear 131 is fixedly arranged on the output end thereof, and the toothed ring 132 is rotatably arranged on the top of the annular guide rail 12. The cylindrical gear 131 and the toothed ring 132 are in meshing connection. The screw sliding table 11 is fixedly connected with the top ends of the two connecting rods. The stepping motor 130 is electrically connected with the controller. In the additive manufacturing process, due to the melting and solidification of the material, the size of the part is easily affected by factors such as temperature change and material shrinkage, and the main reasons for such defects are that the thermal expansion coefficients of the materials are not matched, the melting temperature changes greatly or the process parameters are not properly set. Since the additive manufacturing equipment is generally in three-axis machining mode, it is relatively easy to print square workpieces, but the above problems are particularly obvious when printing circular workpieces, so it is difficult to effectively guarantee the roundness of the circular workpiece. Before printing the circular workpiece, the laser ranging sensor 10 cooperates with the toothed ring 132 to pre-detect the size of the outer wall of the circular workpiece standard part from bottom to top and store it in the controller as a preset outer contour standard size value of the circular workpiece, that is, the distance value between the output end of the laser ranging sensor 10 and the entire outer edge of the circular workpiece from bottom to top. For example, the distance value is 5 cm. The distance value measured by the laser ranging sensor 10 during one rotation should be 5 cm. If the distance value is greater than or less than 5 cm, it indicates that the size is deviated and needs to be repaired. When additive manufacturing, the controller starts the stepping motor 130, so that the cylindrical gear 131 on the output end thereof rotates clockwise. Since the cylindrical gear 131 is in meshing connection with the toothed ring 132, and the toothed ring 132 is in rotational connection with the annular guide rail 12, and the screw sliding table 11 is fixedly arranged on the annular guide rail 12, the toothed ring 132 and the screw sliding table 11 at the top thereof are driven to rotate counterclockwise, the laser ranging sensor 10 is driven to rotate, the automatic following of the welding gun is realized, and the synchronous detection effect is achieved. In cooperation with the screw sliding table 11, the outer contour of the printed circular workpiece is detected from bottom to top in sequence.

[0058] Referring to Figure 5As shown, the extrusion assembly 23 comprises a servo motor 230, a pressing plate 231, an extrusion rod 232, a first connecting rod 233 and a second connecting rod 234, the servo motor 230 is fixedly arranged at the top of the L-shaped plate 111, the first connecting rod 233 is fixedly arranged at the output end of the servo motor 230, the pressing plate 231 is slidingly arranged on the outer wall of the support frame through two guide rods, the extrusion rod 232 is inserted on the storage tank 21, and the top end of the extrusion rod 232 is fixedly connected with the bottom of the pressing plate 231, the second connecting rod 234 is hingedly arranged between the end of the first connecting rod 233 away from the servo motor 230 and the pressing plate 231, the outer wall of the extrusion rod 232 is sleeved with an extension spring 235, the top of the storage tank 21 and the bottom of the pressing plate 231 abut against two ends of the extension spring 235 respectively, the bottom of the storage tank 21 is provided with a discharge port, the discharge port and the spray head 20 are fixedly provided with a high-temperature-resistant hose 200, the servo motor 230 is electrically connected with the controller, when the measured distance value is less than 5 cm, it indicates that the outer contour of the circular workpiece has a pit defect, at this time, the servo motor 230 is started through the controller, so that the output end thereof rotates clockwise, since the output end thereof is fixedly connected with one end of the first connecting rod 233, the other end of the first connecting rod 233 and the side wall of the pressing plate 231 are hingedly connected with two ends of the second connecting rod 234 respectively, the pressing plate 231 is fixedly connected with the top end of the extrusion rod 232, the extrusion rod 232 is inserted with the storage tank 21, the pressing plate 231 is slidingly connected with the support frame through two guide rods, so that the pressing plate 231 is pressed to drive the extrusion rod 232 to press downward in the inside of the storage tank 21, the hot molten metal powder is transported from the high-temperature-resistant hose 200 to the spray head 20, and then sprayed into the pit from the spray head 20 for filling.

[0059] Referring to Figure 12As shown, the angle adjusting assembly 24 comprises a micro motor 240, a first driving wheel 241, a first driven wheel 242 and a first belt 243, the micro motor 240 is fixedly arranged on the outer wall of the hinge seat, the first driving wheel 241 is fixedly arranged on the output end thereof, the first driven wheel 242 is fixedly arranged on one end of the hinge shaft, the first belt 243 is sleeved between the first driving wheel 241 and the first driven wheel 242, and the first driving wheel 241 is smaller than the first driven wheel 242, the micro motor 240 is electrically connected with the controller, in the initial state, the spray angle of the spray head 20 is downward, only the obliquely downward concave can be filled, and when it is found that the angle of the concave is inconsistent with the spray angle of the spray head 20, that is, the obliquely upward concave or the horizontally inward concave, first, the controller is used to stop the micro motor 240, so that the rotation of the first driving wheel 241 on the output end thereof is counterclockwise, and then the controller is used to start the micro motor 240, so that the first driving wheel 241 on the output end thereof is counterclockwise, and since the first driven wheel 242 is fixedly connected with the hinge shaft, the hinge block is hinged with the hinge seat through the hinge shaft, and the spray head 20 is fixedly connected with the hinge block, thereby driving the spray head 20 to rotate from bottom to top, until the inclination angle of the spray head 20 is consistent with that of the concave, thereby facilitating the hot-melt metal powder sprayed by the spray head 20 to be just shot into the concave, thereby meeting the filling modification of the concaves with different inclination angles, and the flexibility of the device is improved.

[0060] With reference to Figure 6 As shown, the smoothing assembly 25 comprises an electric push rod 250, a sliding rail 251, a sliding block 252 and a smoothing roller 253, the sliding rail 251 is fixedly arranged on the outer wall of the L-shaped plate 111 close to one end of the gear ring 132, the sliding block 252 is slidingly arranged on the top of the sliding rail 251, the electric push rod 250 is inserted into the other end of the L-shaped plate 111, the output end thereof is fixedly connected with the sliding block 252, the top of the sliding block 252 is fixedly provided with a mounting block, the outer wall of the mounting block is fixedly provided with a plug rod 254 and two limiting rods, the plug rod 254 and the two limiting rods are sleeved with a mounting frame, and the smoothing roller 253 is rotatably arranged on the end of the mounting frame away from the plug rod 254; the electric push rod 250 is electrically connected with the controller, when the gear ring 132 drives the smoothing roller 253 to come in front of the filled concave in counterclockwise rotation, the electric push rod 250 is started through the controller, so that the output end thereof drives the sliding block 252 to slide in the sliding rail 251 towards the end close to the circular workpiece, since the sliding block 252 is fixedly connected with the plug rod 254 and the two limiting rods through the mounting block, the plug rod 254 and the two limiting rods are inserted with the mounting frame, and the smoothing roller 253 is rotatably connected with the mounting frame, thereby driving the smoothing roller 253 to move close to the end close to the concave, until the outer edge of the smoothing roller 253 is tightly attached to the hot-melt metal powder filled in the concave, under the counterclockwise rotation of the gear ring 132, the smoothing is completed, thereby achieving the repairing effect, and when the measured distance value is greater than 5 cm, it indicates that the convex, i.e. the hump problem, appears on the outer surface of the circular product, at this time, the laser generator 22 is started through the controller to perform hot-melt reshaping on the hump.

[0061] With reference to Figure 8 As shown, the transmission assembly 31 comprises a first bevel gear 310, a second bevel gear 311, a second driving wheel 312, a second driven wheel 313 and a second belt 314, the first bevel gear 310 is fixedly arranged at the end of the articulated shaft away from the first driven wheel 242, the outer wall of the mounting plate is fixedly arranged with a first rotating shaft and a second rotating shaft respectively, the second bevel gear 311 and the second driving wheel 312 are fixedly arranged at the bottom end and the top end of the first rotating shaft respectively, the second bevel gear 311 is larger than the first bevel gear 310, and the first bevel gear 310 and the second bevel gear 311 are meshed and connected, the second driven wheel 313 is fixedly arranged at the top end of the second rotating shaft, the second belt 314 is sleeved between the second driving wheel 312 and the second driven wheel 313, and the second driving wheel 312 is larger than the second driven wheel 313. While the articulated shaft rotates to adjust the spray angle of the spray head 20, the first bevel gear 310 is fixedly connected with the end of the articulated shaft away from the first driven wheel 242, the second bevel gear 311 and the second driving wheel 312 are fixedly connected with the bottom end and the top end of the first rotating shaft respectively, the first bevel gear 310 and the second bevel gear 311 are meshed and connected, the second driven wheel 313 is fixedly connected with the top end of the second rotating shaft, the second driving wheel 312 and the second driven wheel 313 are sleeved through the second belt 314, so as to drive the second rotating shaft to rotate. By designing the transmission assembly, the linkage operation of the repairing mechanism and the hammering mechanism can be realized, compared with the prior art, the number of driving sources of the device can be maximized, the power consumption can be reduced, the cost of detection and repair can be saved, and the overall structure of the device can be locked. The cost and occupied space of the device are reduced, the device is installed on the top of the substrate of the additive manufacturing equipment, and then the device is matched with the additive manufacturing equipment, the use efficiency is improved.

[0062] With reference to Figure 10As shown, the pressing assembly 32 comprises a wedge-shaped turntable 320, a ball 321, a return spring 322 and a lifting rod 323, two limiting blocks are fixedly arranged on the outer wall of the mounting plate, the lifting rod 323 is slidingly arranged between the two limiting blocks, the top of the lifting rod 323 is fixedly provided with a flange 324, the ball 321 is rotatably arranged at the top end of the lifting rod 323, the return spring 322 is sleeved on the outer wall of the upper half of the lifting rod 323, the wedge-shaped turntable 320 is fixedly arranged at the bottom end of the second rotating shaft, the ball 321 abuts against the bottom of the wedge-shaped turntable 320, the conical hammer block 30 is fixedly connected with the bottom end of the lifting rod 323, the bottom of the flange 324 and the top of the limiting block close to the ball 321 are respectively in abutment with the two ends of the return spring 322, when the second rotating shaft rotates, since the wedge-shaped turntable 320 is fixedly connected with the bottom end of the second rotating shaft, the ball 321 abuts against the bottom end of the wedge-shaped turntable 320, the ball 321 is rotatably connected with the lifting rod 323, the lifting rod 323 is slidingly connected with the mounting plate through the two limiting blocks, so that the lifting rod 323 is vertically slid by the abutment of the ball 321 with the rotation of the wedge-shaped turntable 320, and then the conical hammer block 30 at the bottom of the lifting rod 323 and the rubber head 300 are lowered to synchronously hammer the forming layer of the workpiece.

[0063] Referring to Figure 10 As shown, the bottom of the conical hammer block 30 is fixedly provided with the rubber head 300, the rubber head 300 is made of high-temperature-resistant rubber material, and is arranged at the bottom of the circular hammer block, so that the forming layer can be hammered by the conical hammer block 30, the residual stress in the formed part is effectively released, the internal organization form of the metal is improved, the uniformity of the organization is improved, the plasticity is improved while the mechanical properties are improved, the effect of inhibiting crack initiation is achieved, and the fatigue life of the formed part is improved. The rubber head 300 is made of flexible material, which will not crack the workpiece compared with metal material, and plays a protective role.

[0064] Referring to Figure 6 As shown, the outer wall of the insertion rod 254 is sleeved with a buffer spring 255, the outer wall of the mounting frame and the outer wall of the mounting block are in abutment with the two ends of the buffer spring 255 respectively, and the buffer spring 255 ensures that the abutting force applied by the smoothing roller 253 on the outer wall of the circular workpiece is reduced while the hot-melt metal powder is smoothed, so that the circular workpiece does not stop rotating, and the laser distance sensor 10 continues to rotate with the tooth ring 132 to detect the remaining profile of the circular workpiece.

[0065] Referring to Figure 12 As shown, the outer wall of the hinged block is fixedly provided with a high-definition camera 26, the high-definition camera 26 is electrically connected with the controller, and the high-definition camera 26 provides a repair field of view for the nozzle 20 or the laser generator 22 after the laser distance sensor 10 detects the defects of the workpiece, so that the device can be accurately operated.

[0066] The working principle of this invention: During additive manufacturing, the dimensions of parts are easily affected by factors such as temperature changes and material shrinkage due to the melting and solidification of materials. The main reasons for this defect are mismatched thermal expansion coefficients, large variations in melting temperature, or improper process parameter settings. Since additive manufacturing equipment is generally a three-axis machining method, it is relatively easy to print square workpieces. However, the above problems are particularly pronounced when printing round workpieces, making it impossible to effectively guarantee the roundness of the outer contour of the round workpiece. Before printing the round workpiece, the laser range sensor 10, in conjunction with the toothed ring 132, first detects the outer wall dimension of the standard round workpiece from bottom to top and stores it inside the controller. This serves as the preset standard outer contour dimension value of the round workpiece, i.e., the entire outer wall dimension from the output end of the laser range sensor 10 to the round workpiece from bottom to top. For example, if the spacing between the outer edges is 5 cm, the spacing measured by the laser rangefinder 10 rotating one revolution should always be 5 cm. If there is a spacing greater than or less than 5 cm, it indicates that there is a dimensional deviation and repair is required. During additive manufacturing, the stepper motor 130 is started by the controller, which causes the cylindrical gear 131 on its output end to rotate clockwise. Since the cylindrical gear 131 is meshed with the gear ring 132, and the gear ring 132 is rotatably connected to the annular guide rail 12, and the lead screw slide 11 is fixed on the annular guide rail 12, it drives the gear ring 132 and the lead screw slide 11 on its top to rotate counterclockwise. By driving the laser rangefinder 10 to rotate, the welding gun is automatically followed, thereby achieving synchronous detection. Then, in conjunction with the lead screw slide 11, the outer contour of the printed circular workpiece is inspected from bottom to top.

[0067] When the measured spacing value is less than 5 cm, it indicates that there is a pit defect on the outer contour of the circular workpiece. At this time, the servo motor 230 is started by the controller, so that its output end rotates clockwise. Since its output end is fixedly connected to one end of the first connecting rod 233, the other end of the first connecting rod 233 and the side wall of the pressure plate 231 are respectively hinged to the two ends of the second connecting rod 234. The pressure plate 231 is fixedly connected to the top end of the extrusion rod 232. The extrusion rod 232 is inserted into the storage tank 21. The pressure plate 231 is slidably connected to the support frame through two guide rods, so that the pressure plate 231 presses down and drives the extrusion rod 232 to press down inside the storage tank 21, and the hot melt metal powder is transported from the high temperature resistant hose 200 to the nozzle 20, and then sprayed from the nozzle 20 into the pit for filling.

[0068] When the tooth ring 132 rotates counterclockwise to drive the smoothing roller 253 to the front of the filled pit, the controller starts the electric push rod 250, and the output end of the electric push rod 250 drives the sliding block 252 to slide in the sliding rail 251 towards the end close to the circular workpiece. Since the sliding block 252 is fixedly connected with the insertion rod 254 and the two limiting rods through the mounting block, the insertion rod 254 and the two limiting rods are inserted with the mounting frame, and the smoothing roller 253 is rotatably connected with the mounting frame, thereby driving the smoothing roller 253 to move close to the end close to the pit, until the outer edge of the smoothing roller 253 is tightly attached to the hot-melt metal powder filled in the pit. Under the counterclockwise rotation of the tooth ring 132, the smoothing is completed, thereby achieving the repairing effect. The buffer spring 255 ensures that the hot-melt metal powder is smoothed while reducing the resistance applied by the smoothing roller 253 to the outer wall of the circular workpiece, so that the circular workpiece does not stop rotating, and the laser ranging sensor 10 continues to rotate with the tooth ring 132 to detect the remaining contour of the circular workpiece.

[0069] When the measured distance value is greater than 5 cm, it indicates that the outer surface of the circular product has a convexity, i.e. a hump problem. At this time, the laser generator 22 is started by the controller to heat and reshape the hump.

[0070] In the initial state, the spray angle of the spray head 20 is downward, which can only satisfy the filling of the downward inclined pit in the pit. When the angle of the pit is found to be inconsistent with the spray angle of the spray head 20, i.e. the upward inclined pit or the horizontally inward pit, the controller is used to stop the rotation of the tooth ring 132 by stopping the stepping motor 130, and then the micro motor 240 is started by the controller, so that the first driving wheel 241 on the output end of the micro motor 240 rotates counterclockwise. Since the first driven wheel 242 is fixedly connected with the hinge shaft, the hinge block is hingedly connected with the hinge seat through the hinge shaft, and the spray head 20 is fixedly connected with the hinge block, thereby driving the spray head 20 to rotate from bottom to top until the inclination angle of the pit is consistent, thereby facilitating the hot-melt metal powder sprayed by the spray head 20 to enter the pit, thereby satisfying the filling and modification of pits with different inclination angles, and improving the flexibility of the device.

[0071] The high-definition camera 26 facilitates the provision of a repair field for the spray head 20 or the laser generator 22 after the laser ranging sensor 10 detects the defects of the workpiece, thereby facilitating the accurate operation of the device.

[0072] When the hinge shaft rotates to adjust the spray angle of the spray head 20, the first bevel gear 310 is fixedly connected with the end of the hinge shaft away from the first driven wheel 242, the second bevel gear 311 and the second driving wheel 312 are fixedly connected with the bottom end and the top end of the first rotating shaft respectively, the first bevel gear 310 and the second bevel gear 311 are meshingly connected, the second driven wheel 313 is fixedly connected with the top end of the second rotating shaft, and the second driving wheel 312 and the second driven wheel 313 are sleeved by the second belt 314, thereby driving the second rotating shaft to rotate.

[0073] When the second rotating shaft rotates, the wedge-shaped rotating table 320 is fixedly connected with the bottom end of the second rotating shaft, the ball 321 is in contact with the bottom end of the wedge-shaped rotating table 320, the ball 321 is rotatably connected with the lifting rod 323, the lifting rod 323 is slidably connected with the mounting plate through two limiting blocks, so that the lifting rod 323 is driven to vertically slide by the rotation of the wedge-shaped rotating table 320 to contact the ball 321, and then the conical hammer block 30 at the bottom of the lifting rod 323 and the rubber head 300 are driven to descend, and the forming layer of the workpiece is synchronously hammered.

[0074] The rubber head 300 is made of high-temperature-resistant rubber material and is arranged at the bottom of the circular hammering block. The rubber head 300 can hammer the forming layer through the conical hammer block 30, effectively release the residual stress inside the formed part, improve the internal organization form of the metal, improve the uniformity of the organization, enhance the plasticity while improving the mechanical properties, play a role in inhibiting crack initiation, and then improve the fatigue life of the formed part. The rubber head 300 is made of flexible material and will not crack the workpiece compared with metal material, which plays a protective role.

Claims

1. A testing and repair device for plasma arc wire additive manufacturing, characterized in that: The system includes a controller, a detection mechanism (1), a repair mechanism (2), and a hammering mechanism (3). The bottom of the detection mechanism (1) is provided with a base plate (4). The detection mechanism (1) includes a laser rangefinder (10), a lead screw slide (11), an annular guide rail (12), and a rotating assembly (13). The annular guide rail (12) is fixedly mounted on the top of the base plate (4), and the rotating assembly (13) is located on the top of the base plate (4). The lead screw slide (11) is fixedly mounted on the top of the rotating assembly (13) by two connecting rods. The outer wall of the lead screw slide (11) is... A sliding plate (110) is provided, and an L-shaped plate (111) is fixedly provided on the outer wall of the sliding plate (110). A laser rangefinder (10) is fixedly provided on the bottom outer wall of the L-shaped plate (111). A repair mechanism (2) is provided on the outer wall of the L-shaped plate (111). The repair mechanism (2) includes a nozzle (20), a storage tank (21), a laser generator (22), a squeezing assembly (23), an angle adjustment assembly (24), and a smoothing assembly (25). A support plate is fixedly provided on the outer wall of the L-shaped plate (111), and a top of the support plate is fixedly provided with... There is a hinge seat, a hinge shaft is provided on the hinge seat, and a hinge block is fixed on the outer wall of the hinge shaft. The nozzle (20) and the laser generator (22) are both fixed on the hinge block. The angle adjustment component (24) is located between the hinge seat and the hinge shaft. A support frame is fixed on the top of the L-shaped plate (111). The storage tank (21) is fixed on the support frame. The extrusion component (23) is inserted into the storage tank (21). The smoothing component (25) is located on the L-shaped plate (111). The hammering mechanism (3) is located on the outer wall of the L-shaped plate (111). 3) Includes a conical hammer block (30), a transmission assembly (31), and a pressing assembly (32). A mounting plate is fixedly provided on the side wall of the hinge block. The pressing assembly (32) is provided on the mounting plate. The transmission assembly (31) is provided between the hinge shaft and the pressing assembly (32). The conical hammer block (30) is fixedly provided on the pressing assembly (32). The laser generator (22), the laser range sensor (10), the rotation assembly (13), the extrusion assembly (23), the angle adjustment assembly (24), and the smoothing assembly (25) are all electrically connected to the controller. The rotating assembly (13) includes a stepper motor (130), a cylindrical gear (131), and a gear ring (132). The stepper motor (130) is fixedly mounted on the top of the base plate (4), the cylindrical gear (131) is fixedly mounted on its output end, and the gear ring (132) is rotatably mounted on the top of the annular guide rail (12). The cylindrical gear (131) and the gear ring (132) are meshed together. The lead screw slide (11) is fixedly connected to the top ends of the two connecting rods. The stepper motor (130) is electrically connected to the controller. The angle adjustment assembly (24) includes a micro motor (240), a first drive wheel (241), a first driven wheel (242), and a first belt (243). The micro motor (240) is fixed on the outer wall of the hinge seat. The first drive wheel (241) is fixed on its output end. The first driven wheel (242) is fixed on one end of the hinge shaft. The first belt (243) is sleeved between the first drive wheel (241) and the first driven wheel (242). The first drive wheel (241) is smaller than the first driven wheel (242). The micro motor (240) is electrically connected to the controller. The extrusion assembly (23) includes a servo motor (230), a pressure plate (231), an extrusion rod (232), a first connecting rod (233), and a second connecting rod (234). The servo motor (230) is fixedly mounted on the top of the L-shaped plate (111), and the first connecting rod (233) is fixedly mounted on its output end. The pressure plate (231) is slidably mounted on the outer wall of the support frame via two guide rods. The extrusion rod (232) is inserted into the storage tank (21), and the top end of the extrusion rod (232) is fixedly connected to the bottom end of the pressure plate (231). Then, the second link (234) is hinged between the end of the first link (233) away from the servo motor (230) and the pressure plate (231). A telescopic spring (235) is sleeved on the outer wall of the extrusion rod (232). The top of the storage tank (21) and the bottom of the pressure plate (231) respectively abut against the two ends of the telescopic spring (235). The bottom of the storage tank (21) is provided with a discharge port. A high-temperature resistant hose (200) is fixed between the discharge port and the nozzle (20). The servo motor (230) is electrically connected to the controller. The transmission assembly (31) includes a first bevel gear (310), a second bevel gear (311), a second driving wheel (312), a second driven wheel (313), and a second belt (314). The first bevel gear (310) is fixedly mounted on the end of the hinge shaft away from the first driven wheel (242). A first rotating shaft and a second rotating shaft are fixedly mounted on the outer wall of the mounting plate, respectively. The second bevel gear (311) and the second driving wheel (312) are fixedly mounted on the bottom and top ends of the first rotating shaft, respectively. The second bevel gear (311) is larger than the first bevel gear (310), and the first bevel gear (310) and the second bevel gear (311) are meshed together. The second driven wheel (313) is fixedly mounted on the top end of the second rotating shaft. The second belt (314) is sleeved between the second driving wheel (312) and the second driven wheel (313), and the second driving wheel (312) is larger than the second driven wheel (313).

2. The detection and repair device for plasma arc wire additive manufacturing according to claim 1, characterized in that: The smoothing assembly (25) includes an electric push rod (250), a slide rail (251), a slider (252), and a smoothing roller (253). The slide rail (251) is fixedly mounted on the outer wall of one end of the L-shaped plate (111) near the toothed ring (132). The slider (252) is slidably mounted on the top of the slide rail (251). The electric push rod (250) is inserted into the other end of the L-shaped plate (111), and its output end is fixedly connected to the slider (252). A mounting block is fixedly mounted on the top of the slider (252). A rod (254) and two limit rods are fixedly mounted on the outer wall of the mounting block. A mounting frame is sleeved between the rod (254) and the two limit rods. The smoothing roller (253) is rotatably mounted on the end of the mounting frame away from the rod (254). The electric push rod (250) is electrically connected to the controller.

3. The detection and repair device for plasma arc wire additive manufacturing according to claim 2, characterized in that: The pressing assembly (32) includes a wedge-shaped turntable (320), a ball bearing (321), a return spring (322), and a lifting rod (323). Two limiting blocks are fixedly provided on the outer wall of the mounting plate. The lifting rod (323) is slidably disposed between the two limiting blocks. A flange (324) is fixedly provided on the top of the lifting rod (323). The ball bearing (321) is rotatably disposed on the top of the lifting rod (323). The return spring (322) is sleeved on the upper half of the outer wall of the lifting rod (323). The wedge-shaped turntable (320) is fixedly disposed at the bottom end of the second rotating shaft. The ball bearing (321) abuts against the bottom of the wedge-shaped turntable (320). The conical hammer block (30) is fixedly connected to the bottom end of the lifting rod (323). The bottom of the flange (324) and the top of one of the limiting blocks near the ball bearing (321) abut against the two ends of the return spring (322), respectively.

4. The detection and repair device for plasma arc wire additive manufacturing according to claim 3, characterized in that: A rubber head (300) is fixedly provided at the bottom of the conical hammer block (30).

5. The detection and repair device for plasma arc wire additive manufacturing according to claim 4, characterized in that: A buffer spring (255) is fitted on the outer wall of the insertion rod (254), and the outer walls of the mounting bracket and the mounting block respectively abut against the two ends of the buffer spring (255).

6. The detection and repair device for plasma arc wire additive manufacturing according to claim 5, characterized in that: A high-definition camera (26) is fixedly installed on the outer wall of the hinge block, and the high-definition camera (26) is electrically connected to the controller.

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