Automatic thermal spraying robot for die-casting die maintenance

Abstract

The invention relates to the technical field of plasma thermal spraying processing, in particular to an automatic thermal spraying robot for die-casting die maintenance, which comprises a bottom frame, a driving component, a driven screw rod, a moving component, a spray gun, an adjusting block, an adjusting component, a synchronous block, a synchronous component, a cooling system and a re-spraying positioning component, spiral spraying of the die-casting die is achieved in the mode that rotation of the die-casting die is combined with movement of the spraying gun, the adjusting component and the transmission are arranged, the spraying distance of the spraying gun to the die-casting die can be adjusted, meanwhile, the movement speed of the spraying gun can be synchronously adjusted, and cooling can be stopped at any time by arranging the cooling system and the re-spraying positioning component; and after cooling, it is guaranteed that the spray gun can be aligned to the position of the die-casting die before cooling, the quality of plasma thermal spraying is guaranteed, the maintenance effect of the die-casting die is improved, and then the quality of non-ferrous metal parts produced by the die-casting die is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of plasma thermal spraying processing, in particular to a thermal spraying automatic robot for maintenance of a die-casting die. BACKGROUND

[0002] As an important surface engineering technology, thermal spraying plays a key role in industrial manufacturing. Among them, plasma thermal spraying technology has shown significant advantages in the maintenance and performance improvement of die-casting dies due to its unique process characteristics. Plasma thermal spraying is a process method that forms a dense coating by using the extremely high temperature (usually up to 10000-15000 ℃) and energy density of high-temperature plasma formed by ionizing inert gases (such as argon, nitrogen or mixed gases) to instantaneously melt and high-speed spray the sprayed material to the substrate surface. Compared with traditional flame spraying, arc spraying and other technologies, the most significant feature of plasma thermal spraying is its ultra-high temperature characteristics, which makes it irreplaceable in the maintenance and maintenance of die-casting dies.

[0003] As a production tool for non-ferrous metal parts such as aluminum alloy, copper alloy, etc., the die-casting die surface is subjected to long-term erosion, corrosion and thermal fatigue of molten metal at high temperature during use, resulting in surface wear, cracking, corrosion and other failure phenomena. Therefore, the surface of the die-casting die needs to be maintained periodically to ensure the quality of the production of non-ferrous metal parts such as aluminum alloy, copper alloy, etc. Plasma thermal spraying technology can effectively deposit high-melting-point wear-resistant and heat-resistant materials (such as tungsten carbide, aluminum oxide, zirconium oxide, etc.) on the die surface to form a protective coating with excellent performance. In particular, its extremely high plasma temperature can completely melt these high-melting-point materials, ensuring good metallurgical bonding between the coating and the substrate, which is difficult to achieve by other thermal spraying processes. For example, the temperature of flame spraying is usually only 2500-3000 ℃, which is far from enough to melt ceramic materials such as aluminum oxide (melting point 2050 ℃); while arc spraying has higher temperature, but still has limitations when spraying high-melting-point materials. In contrast, the ultra-high temperature characteristics of plasma thermal spraying enable it to handle almost all known engineering materials, providing a wider choice for surface strengthening of die-casting dies.

[0004] However, the high-temperature characteristics of plasma thermal spraying also bring some challenges, the most important of which is the thermal influence on the substrate material. During the spraying process, the high-temperature plasma not only melts the sprayed material, but also produces significant heat input to the die substrate. If not controlled, the excessively high substrate temperature will cause the die to deform, concentrate thermal stress, and even degrade the performance of the substrate material. Especially for precision die-casting dies, slight thermal deformation can affect their dimensional accuracy and service life.

[0005] In the prior art, for example, the surface plasma thermal spraying process of forged aluminum alloy wheel hub of patent No. CN108531849A, by using compressed air to forcibly cool the hub during plasma spraying, so as to achieve the purpose of cooling the plasma thermal spraying effect.

[0006] In the prior art, by using compressed air to cool during thermal spraying, the problem of heat input to the base body during high-temperature plasma thermal spraying is solved. However, in actual work, using the method of plasma thermal spraying on the inner layer of the die casting mold at the same time, and cooling the outer surface of the die casting mold with compressed air, will cause the coating particles that have not completely solidified in the inner layer of the die casting mold to cool prematurely during thermal spraying maintenance of the die casting mold, resulting in insufficient spreading of the molten particles, and the bonding strength of the molten particles to the die casting mold is reduced. Secondly, using the method of spraying and cooling at the same time, the cooling compressed air also has the risk of disturbing the deposition of molten particles, causing uneven distribution of the coating sprayed on the die casting mold, affecting the maintenance effect of the die casting mold, and further affecting the quality of non-ferrous metal part production. In the prior art, the method of thermal spraying first and then cooling can also be used. However, this method requires the plasma thermal spraying action of the die casting mold to be completed in one go, and then the die casting mold is cooled, otherwise it will be difficult for the plasma spray gun to reposition to the original spraying position of the mold, resulting in uneven thermal spraying inside the mold. Secondly, when thermal spraying a larger die casting mold, if the die casting mold is completely sprayed, the high temperature of the base body will cause the mold to deform.

[0007] Therefore, a thermal spraying automation robot for die casting mold maintenance is proposed. SUMMARY

[0008] The purpose of the present application is to provide a thermal spraying automation robot for die casting mold maintenance. To solve the problem that in the prior art, during plasma thermal spraying maintenance of the die casting mold, spraying and cooling at the same time will affect the spraying quality, and spraying first and then cooling, when the die casting mold is large, completely spraying and then cooling will cause the mold base body to accumulate a lot of heat, causing the mold to deform, and using the method of spraying and cooling at the same time will cause the plasma spray gun to be difficult to reposition to the original spraying position, resulting in uneven spraying.

[0009] To achieve the above purpose, the present application provides the following technical solutions:

[0010] The utility model provides an automatic robot of thermal spraying for die casting mould maintenance, including the chuck that is provided with on the chassis, including drive component, driven screw rod, moving part, spray gun, adjusting component, synchronous block, synchronous component, cooling system and re -spraying positioning component, drive component is provided on the chassis to drive the chuck rotation, the rotating support is provided with on the chassis, driven screw rod is rotatably connected on the rotating support, moving part is connected between spray gun and driven screw rod, moving part is used for driving spray gun to move when driven screw rod rotates, adjusting component is used for adjusting the overhang length of spray gun, the synchronous slide groove is provided with on the chassis, synchronous block is slidably connected in the synchronous slide groove, synchronous component is provided on the synchronous block, which is used to adjust the transmission ratio of driven screw rod in cooperation with drive component when adjusting the overhang length of spray gun, the cooling system is provided on the chassis to rotate and cool the die casting mould in cooperation with drive component when the temperature of die casting mould is too high, the re -spraying positioning component is arranged at the lower end of driven screw rod, and the re -spraying positioning component is used to fix spray gun in cooperation with synchronous component when the die casting mould is cooled, and the die casting mould is reset to the position before cooling after cooling.

[0011] Preferably, the drive component includes a driving shaft, a driven shaft, a transmission and a connecting unit, the left end of the driving shaft and the driven shaft is rotatably connected to the chassis, the right end of the driving shaft is fixedly connected to the chuck, the transmission is arranged on the driving shaft and the driven shaft, and the connecting unit is arranged at the right end of the driven shaft to connect the driven shaft with the driven screw rod during thermal spraying.

[0012] Preferably, the connecting unit includes a connecting slot, a connecting block, a connecting sleeve, a connecting plug rod and a connecting plug slot, the connecting slot is formed in the chassis, the connecting block is slidably connected in the connecting slot, the connecting sleeve is rotatably connected to the connecting block, the left end of the connecting sleeve is connected to the right end of the driven shaft through a sliding key, the connecting plug rod is arranged at the right end of the connecting sleeve, the connecting plug rod is polygonal in shape, the connecting plug slot is formed at the left end of the driven screw rod, the connecting plug rod is inserted into the connecting plug slot, and the connecting plug rod is polygonal in shape.

[0013] In the above scheme, the polygonal design is to enable the connecting plug rod to rotate and drive the driven screw rod to rotate together with the connecting plug slot when the connecting plug rod is inserted into the connecting plug slot.

[0014] Preferably, the moving part includes a moving frame, a moving limiting rod and a moving limiting slot, the moving limiting slot is formed in the chassis, the moving limiting rod is slidably connected in the moving limiting slot, the moving frame is fixed to the moving limiting rod, the moving frame is provided with a screw rod slot, and the moving frame moves through the screw rod slot in cooperation with the driven screw rod.

[0015] Preferably, the adjusting component comprises an adjusting rod, an adjusting groove, an adjusting block, an adjusting elastic member, an adjusting chamfer and an adjusting sleeve, the adjusting rod is fixedly connected to the moving frame, the adjusting groove is arranged in the adjusting rod, the adjusting block is slidably connected to the adjusting groove, the spray gun is fixed to the front end of the adjusting block, the adjusting elastic member is connected to the front end of the adjusting block and the inner wall of the adjusting rod, the adjusting chamfer is arranged at the rear end of the adjusting block, the adjusting sleeve is slidably connected to the outside of the adjusting rod, and the right end of the adjusting sleeve is matched with the adjusting chamfer.

[0016] In the above scheme, when the moving frame moves left and right, the adjusting rod moves left and right, and then the adjusting block and the spray gun move left and right, so that the spray gun sprays one side of the die casting mold and slowly moves, and is matched with the rotation of the die casting mold, so as to comprehensively spray the die casting mold. When the length of the spray gun extending out of the adjusting rod needs to be adjusted, the position of the adjusting sleeve only needs to be adjusted.

[0017] Preferably, the synchronous component comprises a synchronous connecting rod, a synchronous limiting groove, a driving lever, a driven lever, a synchronous limiting rod and a switching unit, the synchronous connecting rod is fixed to the right end of the synchronous block, the synchronous limiting groove is arranged on the synchronous connecting rod, the driving lever and the driven lever are fixed to the upper end of the synchronous block, the driving lever and the driven lever are connected with the transmission, the synchronous limiting rod is fixed to the lower end of the adjusting sleeve, the lower end of the synchronous limiting rod is slidably connected with the synchronous limiting groove, and the switching unit is arranged in the synchronous limiting rod. The switching unit is used to change the synchronous state of the synchronous connecting rod and the synchronous limiting rod.

[0018] Preferably, the switching unit comprises a switching groove, a switching rod, a switching baffle and a switching elastic member, the switching groove is arranged in the synchronous limiting rod, the switching rod is slidably connected to the switching groove, the switching baffle is arranged on the side of the switching rod, the switching elastic member is abutted to the lower end of the switching baffle and the inner wall of the synchronous limiting rod, respectively, the switching rod is provided with friction particles at the upper end and the lower end, the upper end of the switching rod is matched with the lower end of the adjusting rod, and the lower end of the switching rod is matched with the bottom of the synchronous limiting groove.

[0019] In the above scheme, when the position of the synchronous block changes, the synchronous block can also drive the driven lever and the driving lever to change the position, and then change the transmission ratio of the driving shaft and the driven shaft, so that the spray gun can not only adjust the distance from the spray gun to the inner wall of the die casting mold to ensure the effect of plasma spraying when spraying different aperture die casting molds, but also can change the transmission ratio of the transmission according to the extension position of the spray gun when adjusting the position of the spray gun, and then change the rotation speed of the transmission shaft.

[0020] Preferably, the side of the synchronous limiting rod is slidably connected with a stabilizing block, and the lower end of the stabilizing block is matched with the upper end of the switching baffle.

[0021] The hands of the operator are convenient when adjusting the position of the adjusting sleeve, and the lower end of the switching rod is stably kept in friction with the bottom of the synchronous limiting groove.

[0022] Preferably, the cooling system uses compressed air to cool the non-spraying area of the surface of the die casting mold.

[0023] Preferably, the complex spraying positioning component comprises a horizontal pushing groove, a horizontal pushing block, a vertical pushing groove, a vertical pushing block, a vertical pushing plate, a friction groove, a friction block, a friction rod, a friction spring and a friction baffle, the horizontal pushing groove is arranged at the right side of the connecting groove, the horizontal pushing block is slidingly connected in the connecting groove, the left end of the horizontal pushing block is fixedly connected with the right end of the connecting block, the vertical pushing groove is arranged at the rear end of the horizontal pushing groove, the vertical pushing block is slidingly connected in the vertical pushing groove, the front end of the vertical pushing block is provided with a vertical pushing chamfer, the vertical pushing chamfer is matched with the right end of the horizontal pushing block, the vertical pushing plate is fixedly arranged at the rear end of the vertical pushing block, the friction groove is arranged in the synchronous connecting rod, the friction block is slidingly connected in the friction groove, the friction rod is fixedly connected with the front end of the friction block, the friction baffle is arranged outside the front end of the fixed connecting rod, the friction baffle is connected with the friction rod, the friction spring is abutted at both ends with the rear end of the friction baffle and the front end of the fixed connecting rod, the front end of the friction baffle is matched with the rear end of the vertical pushing plate, and the rear end of the friction block is matched with the switching rod.

[0024] In the above scheme, when the vertical pushing plate moves backward, the rear end of the vertical pushing plate is abutted with the front end of the friction baffle, and the friction baffle is driven to move backward to extrude the friction spring, and the rear end of the friction block is matched with the switching rod, wherein the matching means that the friction block is driven to move backward when the friction baffle moves backward, the rear end of the friction block is abutted with the front end of the switching rod, and the switching rod is locked by the friction block.

[0025] Compared with the prior art, the present application has the following beneficial effects:

[0026] The application realizes the clamping and rotation of the die-casting mold by setting the driving component and the chuck, realizes the spraying and transverse movement of the die-casting mold by setting the spray gun and the moving component, realizes the spiral spraying of the die-casting mold by the self-rotation of the die-casting mold combined with the movement of the spray gun, realizes the full and uniform spraying of the inner cavity of different die-casting molds by adjusting the spraying distance of the spray gun and the moving speed of the spray gun at the same time, avoids the phenomenon of repeated spraying or missing spraying, and realizes the plasma thermal spraying of the large die-casting mold. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a whole three-dimensional structure schematic diagram of the application;

[0028] Figure 2 It is a transmission structure schematic diagram of the application;

[0029] Figure 3 It is a driving component cross-section structure schematic diagram of the application;

[0030] Figure 4 It is a synchronous component structure schematic diagram of the application;

[0031] Figure 5 It is a die-casting mold spraying state structure schematic diagram of the application;

[0032] Figure 6 It is a synchronous component structure schematic diagram of the application;

[0033] Figure 7 It is a synchronous limiting rod cross-section structure schematic diagram of the application;

[0034] Figure 8 It is a Figure 7 It is an enlarged structure schematic diagram of A in the application;

[0035] Figure 9 It is a re-spraying positioning component cross-section structure schematic diagram of the application;

[0036] Figure 10 It is a Figure 9 It is a chassis internal structure schematic diagram of B in the application.

[0037] In the figure: 1, base frame; 11, rotating support; 12, synchronous sliding groove; 2, chuck; 3, driving part; 4, driven screw; 5, moving part; 6, spray gun; 8, adjusting part; 9, synchronous block; 101, synchronous part; 102, re-spraying positioning part; 31, driving shaft; 32, driven shaft; 34, connecting unit; 341, connecting groove; 342, connecting block; 343, connecting sleeve; 344, connecting plug; 345, connecting slot; 331, moving driving cone wheel; 332, fixed driving cone wheel; 333, fixed driven cone wheel; 334, moving driven cone wheel; 335, steel belt; 51, moving frame; 52, moving limiting rod; 53, moving limiting groove; 81, adjusting rod; 82, adjusting groove; 83, adjusting block; 84, adjusting elastic member; 85, adjusting chamfer; 86, adjusting sleeve; 1011, synchronous connecting rod; 1012, synchronous limiting groove; 1013, driving lever; 1014, driven lever; 1015, synchronous limiting rod; 1016, switching unit; 10161, switching groove; 10162, switching lever; 10163, switching baffle; 10164, switching elastic member; 10151, stabilizing block; 1021, horizontal pushing groove; 1022, horizontal pushing block; 1023, vertical pushing groove; 1024, vertical pushing block; 10241, vertical pushing chamfer; 1025, vertical pushing plate; 1026, friction groove; 1027, friction block; 1028, friction rod; 1029, friction elastic member; 1030, friction baffle. DETAILED DESCRIPTION

[0038] In order to make the technical solutions in the embodiments of the present application clear and complete, and the features and advantages more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0039] EMBODIMENT

[0040] Please refer to Figures 1 to 2The application provides a hot spraying automatic robot for die casting mold maintenance, which comprises a chassis 1, a chuck 2 arranged on the chassis 1, a driving component 3, a driven screw rod 4, a moving component 5, a spraying gun 6, an adjusting component 8, a synchronous block 9, a synchronous component 101, a cooling system and a re-spraying positioning component 102, wherein the chuck 2 can adopt a pneumatic chuck, such as a Japanese Hidari combined three-jaw pneumatic chuck, or a mechanical manual three-jaw chuck, and only needs to be able to fix the die casting mold in the center of the chuck 2, the driving component 3 is arranged on the chassis 1 to drive the chuck 2 to rotate, a rotating support 11 is arranged on the chassis 1, the driven screw rod 4 is rotatably connected to the rotating support 11, the moving component 5 is connected between the spraying gun 6 and the driven screw rod 4, the moving component 5 is used to drive the spraying gun 6 to move when the driven screw rod 4 rotates, the adjusting component 8 is used to adjust the extension length of the spraying gun 6, a synchronous sliding groove 12 is arranged on the chassis 1, the synchronous block 9 is slidably connected in the synchronous sliding groove 12, the synchronous component 101 is arranged on the synchronous block 9, which is used to adjust the transmission ratio of the driven screw rod 4 in coordination with the driving component 3 when the extension length of the spraying gun 6 is adjusted, the cooling system is arranged on the chassis 1 to cool the die casting mold while rotating in coordination with the driving component 3 when the temperature of the die casting mold is too high, and the re-spraying positioning component 102 is arranged at the lower end of the driven screw rod 4, which is used to fix the spraying gun 6 in coordination with the synchronous component 101 when the die casting mold is cooled, and reset the die casting mold to the position before cooling after the cooling is completed.

[0041] Please refer to Figures 2 to 3 The driving component 3 comprises a driving shaft 31, a driven shaft 32, a transmission and a connecting unit 34, the driving shaft 31 and the driven shaft 32 are rotatably connected to the chassis 1 at the left ends, the driving shaft 31 is fixedly connected to the chuck 2 at the right end, and when the driving shaft 31 rotates, the chuck 2 is driven to rotate, thereby driving the die casting mold clamped by the chuck 2 to rotate, the transmission is arranged on the driving shaft 31 and the driven shaft 32, and the connecting unit 34 is arranged at the right end of the driven shaft 32, which is used to connect the driven shaft 32 and the driven screw rod 4 during hot spraying.

[0042] Please refer to Figure 7 Specifically, a permanent magnet synchronous motor is arranged on the chassis 1, the output end of the permanent magnet synchronous motor is connected to the right end of the driving shaft 31, and the permanent magnet synchronous motor can drive the driving shaft 31 to rotate forward or reverse, and when the rotation is stopped, the permanent magnet synchronous motor can also keep the driving shaft 31 in a locked state.

[0043] Please refer to Figure 2The transmission in the application adopts a CVT transmission, comprising a movable driving cone 331, a fixed driving cone 332, a fixed driven cone 333, a movable driven cone 334 and a steel belt 335. The movable driving cone 331 is slidably connected to the driving shaft 31 through a sliding key. The fixed driving cone 332 is fixed to the right end of the movable driving cone 331 on the driving shaft 31. The fixed driven cone 333 is fixed to the driven shaft 32. The movable driven cone 334 is slidably connected to the driven shaft 32 through a sliding key. The movable driven cone 334 is connected to the right end of the fixed driven cone 333 on the driven shaft 32. The steel belt 335 is connected between the movable driving cone 331, the fixed driving cone 332, the movable driven cone 334 and the fixed driven cone 333.

[0044] Please refer to Figures 2 to 3 The connecting unit 34 comprises a connecting groove 341, a connecting block 342, a connecting sleeve 343, a connecting plug rod 344 and a connecting plug groove 345. The connecting groove 341 is formed in the base frame 1. The connecting block 342 is slidably connected in the connecting groove 341. The connecting sleeve 343 is rotatably connected to the connecting block 342. The left end of the connecting sleeve 343 is connected to the right end of the driven shaft 32 through a sliding key. The connecting sleeve 343 can be slidably connected to the driven shaft 32 through the sliding key. The sliding direction is left-right. The connecting plug rod 344 is arranged at the right end of the connecting sleeve 343. The connecting plug rod 344 is polygonal in shape. The polygonal design is to enable the connecting plug rod 344 to rotate and drive the driven lead screw 4 to rotate together under the cooperation of the connecting plug groove 345 when the connecting plug rod 344 is inserted into the connecting plug groove 345. The connecting plug groove 345 is formed in the left end of the driven lead screw 4. The connecting plug rod 344 is inserted into the connecting plug groove 345.

[0045] Please refer to Figures 3 to 5 The moving part 5 comprises a moving frame 51, a moving limiting rod 52 and a moving limiting groove 53. The moving limiting groove 53 is formed in the base frame 1. The moving limiting rod 52 is slidably connected in the moving limiting groove 53. The moving frame 51 is fixed to the moving limiting rod 52. The moving frame 51 is provided with a lead screw groove. The moving frame 51 moves through the cooperation of the lead screw groove and the driven lead screw 4. The driven lead screw 4 is a ball screw. When the driven lead screw 4 rotates, the driven lead screw 4 can move the moving frame 51 left and right under the cooperation of the lead screw groove and the limiting of the moving limiting rod 52 and the moving limiting groove 53.

[0046] In the above scheme, the moving limiting rod 52 and the moving limiting groove 53 can also be omitted. The limiting of the moving frame 51 is realized by the synchronous limiting rod 1015 and the synchronous limiting groove 1012, so as to reduce the cost of the equipment. The design of the moving limiting rod 52 and the moving limiting groove 53 can further guarantee the supporting and stability effect.

[0047] Please refer to Figures 4 to 8, the adjusting component 8 comprises an adjusting rod 81, an adjusting groove 82, an adjusting block 83, an adjusting elastic member 84, an adjusting chamfer 85 and an adjusting sleeve 86, the adjusting rod 81 is fixedly connected to the moving frame 51, the adjusting groove 82 is formed in the adjusting rod 81, the adjusting block 83 is slidably connected in the adjusting groove 82, the spray gun 6 is fixed to the front end of the adjusting block 83, when the moving frame 51 moves leftward and rightward, the adjusting rod 81 moves leftward and rightward, and then the adjusting block 83 and the spray gun 6 move leftward and rightward, so that the spray gun 6 sprays the die casting die and moves slowly, and the die casting die rotates, so as to comprehensively spray the die casting die, the adjusting elastic member 84 is connected to the front end of the adjusting block 83 and the inner wall of the adjusting rod 81, the adjusting chamfer 85 is arranged at the rear end of the adjusting block 83, the adjusting sleeve 86 is slidably connected to the outside of the adjusting rod 81, and the right end of the adjusting sleeve 86 is matched with the adjusting chamfer 85, wherein the matching refers to that, when it is necessary to adjust the length of the spray gun 6 extending out of the adjusting rod 81, the position of the adjusting sleeve 86 needs to be adjusted, and the length of the spray gun 6 extending out of the adjusting rod 81 is taken as an example, when the radius of the inner cavity of the die casting die is large, the adjusting sleeve 86 is only needed to be moved rightward, the adjusting sleeve 86 moves the adjusting block 83 forward along the adjusting chamfer 85, and then the adjusting block 83 moves the spray gun 6 forward while pressing the adjusting elastic member 84, so that the spray gun 6 gradually moves to the appropriate position in the inner cavity of the die casting die, and the position of the spray gun 6 can be adjusted, thereby ensuring the spraying quality.

[0048] Please refer to Figures 4 to 8 , the synchronous component 101 comprises a synchronous connecting rod 1011, a synchronous limiting groove 1012, a driving lever 1013, a driven lever 1014, a synchronous limiting rod 1015 and a switching unit 1016, the synchronous connecting rod 1011 is fixed to the right end of the synchronous block 9, the synchronous limiting groove 1012 is formed in the synchronous connecting rod 1011, the driving lever 1013 and the driven lever 1014 are fixed to the upper end of the synchronous block 9, the driving lever 1013 and the driven lever 1014 are connected with the transmission, wherein the driving lever 1013 is rotationally connected to the moving driving cone 331 at the right end, the driven lever 1014 is rotationally connected to the moving driven cone 334 at the left end, the driving lever 1013 can drive the moving driving cone 331 to move leftward and rightward, and the moving driving cone 331 can rotate relative to the driving lever 1013, the driven lever 1014 and the moving driven cone 334 are the same, the synchronous limiting rod 1015 is fixed to the lower end of the adjusting sleeve 86, the lower end of the synchronous limiting rod 1015 is slidably connected to the synchronous limiting groove 1012, and the switching unit 1016 is arranged in the synchronous limiting rod 1015, and the switching unit 1016 is used to change the synchronization state of the synchronous connecting rod 1011 and the synchronous limiting rod 1015.

[0049] Please refer to Figures 7 to 8The switching unit 1016 comprises a switching groove 10161, a switching rod 10162, a switching baffle 10163 and a switching elastic member 10164. The switching groove 10161 is arranged in the synchronous limiting rod 1015. The switching rod 10162 is slidingly connected in the switching groove 10161. The switching baffle 10163 is arranged at the side of the switching rod 10162. The two ends of the switching elastic member 10164 respectively abut against the lower end of the switching baffle 10163 and the inner wall of the synchronous limiting rod 1015. The upper and lower ends of the switching rod 10162 are both provided with friction particles, which are not shown in the figure. The friction particles are used to ensure sufficient friction when the upper end of the switching rod 10162 is in contact with the adjusting rod 81 or the lower end of the switching rod 10162 is in contact with the bottom of the synchronous limiting groove 1012. The upper end of the switching rod 10162 cooperates with the lower end of the adjusting rod 81. The lower end of the switching rod 10162 cooperates with the bottom of the synchronous limiting groove 1012. Here, the cooperation means that when the upper end of the switching rod 10162 keeps in contact with the adjusting rod 81 under the action of the elastic force of the switching elastic member 10164, the lower end is not in contact with the bottom of the synchronous limiting groove 1012. At this time, the switching rod 10162 is locked with the adjusting rod 81 due to the friction, so that the synchronous limiting rod 1015 and the adjusting sleeve 86 are fixed relative to the adjusting rod 81, thereby ensuring that the position of the spray gun 6 is fixed.When the switching rod 10162 moves downward, the switching baffle 10163 presses the switching elastic member 10164 downward, the lower end of the switching rod 10162 contacts the synchronous limiting groove 1012 of the synchronous connecting rod 1011, the upper end of the switching rod 10162 is separated from the contact with the adjusting rod 81, the switching rod 10162 is unlocked with the adjusting rod 81, at this time, the switching rod 10162 can also keep the synchronous limiting rod 1015, the adjusting sleeve 86 and the synchronous connecting rod 1011 synchronous due to the friction with the bottom of the synchronous limiting groove 1012, and then the position of the moving adjusting sleeve 86 is adjusted to adjust the extension length of the spray gun 6, the position of the synchronous connecting rod 1011 can also be changed synchronously, and then the position of the synchronous block 9 is changed, the right end of the driving dial rod 1013 is rotationally connected with the moving driving cone gear 331, the left end of the driven dial rod 1014 is rotationally connected with the moving driven cone gear 334, therefore, when the position of the synchronous block 9 is changed, the synchronous block 9 can also drive the driven dial rod 1014 and the driving dial rod 1013 to change the position, and then the position of the moving driven cone gear 334 and the moving driving cone gear 331 is changed, and then the transmission ratio of the driving shaft 31 and the driven shaft 32 is changed, so that when the spray gun 6 sprays the die casting mold with different diameters, the distance between the spray gun 6 and the inner wall of the die casting mold can be adjusted to ensure the effect of plasma spraying, and when the position of the spray gun 6 is adjusted, the transmission ratio of the transmission is changed according to the extension position of the spray gun 6, and then the rotation speed of the transmission shaft is changed, and finally the left and right moving speed of the spray gun 6 is changed, so that the spray gun 6 can change the extension position of the spray gun 6 according to the size of the inner diameter of the die casting mold, and automatically change the rotation speed of the driven shaft 32, and then the moving speed of the spray gun 6 can be changed, so that the moving speed of the spray gun 6 matches the inner diameter of the die casting mold, and then the uniformity and comprehensiveness of the spray gun 6 on the inner wall of the die casting mold during plasma spraying is ensured, and there is no un-sprayed area due to the large inner diameter of the die casting mold and the fast moving speed of the spray gun 6, and there is no overlapping of the spraying area due to the small inner diameter of the die casting mold and the slow moving speed of the spray gun 6, and the quality of the plasma thermal spraying is further ensured.

[0050] Please refer to Figure 8The side of the synchronous limiting rod 1015 is slidably connected with a stabilizing block 10151, and the lower end of the stabilizing block 10151 is matched with the upper end of the switching baffle 10163. The matching here refers to that, when the position of the adjusting sleeve 86 needs to be adjusted to change the extension length of the spray gun 6, at this time, the switching baffle 10163 needs to be pressed downward to extrude the switching elastic member 10164, so that the switching baffle 10163 drives the switching rod 10162 to move downward, the upper end of the switching rod 10162 is disengaged from the adjusting rod 81, and the lower end of the switching rod 10162 is in contact and friction with the bottom of the synchronous limiting groove 1012. Then, the position of the adjusting sleeve 86 is adjusted to change the extension length of the spray gun 6. In order to free one hand of the operator and keep the lower end of the switching rod 10162 in stable friction with the bottom of the synchronous limiting groove 1012, the stabilizing block 10151 is arranged. When the lower end of the switching rod 10162 is in contact with the bottom of the synchronous limiting groove 1012, the switching baffle 10163 moves to the lower side end of the stabilizing block 10151. At this time, the stabilizing block 10151 only needs to be pushed to the upper end of the switching baffle 10163 to be in contact with the switching baffle 10163, so that the switching rod 10162 can be kept in the position in contact with the bottom of the synchronous limiting groove 1012. The synchronous block 9 is also provided with a fastening bolt, which can fix the synchronous block 9 and the chassis 1 after being tightened. When the spray gun 6 is adjusted, the stabilizing block 10151 moves to the upper end of the switching baffle 10163, and the operator can loosen the fastening bolt to make the adjusting sleeve 86 drive the synchronous block 9 to move when the position of the adjusting sleeve 86 is adjusted. After adjustment, the operator only needs to tighten the fastening bolt to fix the synchronous block 9.

[0051] The cooling system uses compressed air to cool the non-spraying area on the outer surface of the die casting mold. Specifically, the chuck 2 is provided with a temperature sensor for monitoring the temperature of the die casting mold. When the temperature of the die casting mold is high, an abnormal temperature signal will be sent to the cooling system. The cooling system can be fixed on the chassis 1, which is not shown in the figure. The cooling nozzle is arranged at a position capable of blowing the side of the rotating die casting mold. The cooling system is a compressed air cooling system, which includes a buffer gas storage tank, a precision pressure regulating valve, an electromagnetic valve group, a mass flow controller, a cooling nozzle, a PLC control cabinet, a pipeline system, etc. The cooling system is provided with a signal processing unit for receiving signals sent by the temperature sensor and driving the cooling nozzle to spray according to the received signals.

[0052] The above cooling system can also be manually controlled. When the temperature sensor detects a temperature signal, the operator can observe the specific temperature of the die casting mold and control the spray gun 6 to stop thermal spraying and control the telescopic cylinder to start working when the temperature is too high. The cooling system is turned on to cool the die casting mold. After cooling, the cooling system is turned off, and then the telescopic cylinder is extended to the left, and the spray gun 6 starts plasma thermal spraying at the same time when the telescopic cylinder is completely reset.

[0053] Please refer toFigures 9 to 10 The repositioning part 102 comprises a horizontal pushing groove 1021, a horizontal pushing block 1022, a vertical pushing groove 1023, a vertical pushing block 1024, a vertical pushing plate 1025, a friction groove 1026, a friction block 1027, a friction rod 1028, a friction spring 1029 and a friction baffle 1030. The horizontal pushing groove 1021 is arranged at the right side of the connecting groove 341, the horizontal pushing block 1022 is slidingly connected in the connecting groove 341, the left end of the horizontal pushing block 1022 is fixedly connected with the right end of the connecting block 342, the vertical pushing groove 1023 is arranged at the rear end of the horizontal pushing groove 1021, the vertical pushing block 1024 is slidingly connected in the vertical pushing groove 1023 of the connecting groove 341, the front end of the vertical pushing block 1024 is provided with a vertical pushing chamfer 10241, the vertical pushing chamfer 10241 is matched with the right end of the horizontal pushing block 1022. The matching here means that when the connecting block 342 moves right to drive the connecting sleeve 343 to move right, the connecting sleeve 343 is separated from the sliding key of the driven shaft 32, the connecting block 342 drives the horizontal pushing block 1022 to move right, the horizontal pushing block 1022 moves right to contact the vertical pushing chamfer 10241, and the horizontal pushing block 1022 drives the vertical pushing block 1024 and the vertical pushing plate 1025 to move backward along the vertical pushing chamfer 10241 until the vertical pushing chamfer 10241 is completely moved to the rear end of the horizontal pushing block 1022. The vertical pushing plate 1025 is fixedly connected at the rear end of the vertical pushing block 1024. The friction groove 1026 is arranged in the synchronous connecting rod 1011, the friction block 1027 is slidingly connected in the friction groove 1026, the friction rod 1028 is fixedly connected at the front end of the friction block 1027, the friction baffle 1030 is arranged outside the front end of the fixed connecting rod, the friction baffle 1030 is connected with the friction rod 1028, the friction spring 1029 is respectively abutted at both ends with the rear end of the friction baffle 1030 and the front end of the fixed connecting rod, the front end of the friction baffle 1030 is matched with the rear end of the vertical pushing plate 1025. The matching here means that when the vertical pushing plate 1025 moves backward, the rear end of the vertical pushing plate 1025 abuts against the front end of the friction baffle 1030 to drive the friction baffle 1030 to move backward to press the friction spring 1029. The rear end of the friction block 1027 is matched with the switch rod 10162. The matching here means that when the friction baffle 1030 moves backward, the friction block 1027 moves backward to abut against the front end of the switch rod 10162, so that the switch rod 10162 is locked by the friction block 1027.

[0054] Please refer to Figure 3 A telescopic air cylinder is further arranged at the right end of the connecting block 342. When the temperature sensor detects that the temperature of the die casting mold is too high, the telescopic air cylinder starts to work to drive the connecting block 342 to move right, so that the connecting sleeve 343 is separated from the sliding key of the driven shaft 32, and the driven shaft 32 is not rotated to drive the driven lead screw 4 to rotate when the cooling system works, so that the connecting block 342 continues to rotate to drive the die casting mold to rotate, and the movable part 5 and the spray gun 6 connected with the driven lead screw 4 are not moved.

[0055] Specifically, the transmission ratio of the driving shaft 31 and the driven shaft 32 is much greater than 1, and is always an integer multiple, that is, the driven shaft 32 rotates one circle, and the driving shaft 31 rotates more than one circle, for example, one circle, two circles, and so on. The driven shaft 32 and the connecting sleeve 343 are connected by a sliding key. The driven shaft 32 is provided with only one key groove, and the connecting sleeve 343 is also provided with only one spline. The purpose of the integer multiple design and the key groove and spline being provided with only one set is to enable the driving shaft 31 to rotate n times the number of circles when the key groove is re-aligned with the spline after the driven shaft 32 rotates n circles, so that the driving shaft 31 can drive the chuck 2 and the die casting mold to always return to the position of the nozzle 6 before cooling. The purpose of the transmission ratio being much greater than 1 is to provide more adjustment positions to meet the transmission ratio requirements of the driving shaft 31 and the driven shaft 32 when adjusting the length of the nozzle 6. The adjustment rod 81 can also be marked with multiple integer positions of the transmission ratio of the driving shaft 31 and the driven shaft 32 to facilitate the operator to adjust.

[0056] Working principle: When maintaining the die casting mold for producing non-ferrous metal parts, first place the die casting mold on the chuck 2, then clamp the bottom of the die casting mold with the chuck 2, and then adjust the distance between the nozzle 6 and the inner wall of the die casting mold according to the inner cavity radius of the die casting mold to ensure the quality of the plasma spraying. When adjusting the distance between the nozzle 6 and the inner cavity radius of the die casting mold, only the switching baffle 10163 needs to be actuated to move downward to press the switching elastic member 10164. The downward movement of the switching baffle 10163 drives the switching rod 10162 to move downward, so that the upper end of the switching rod 10162 is out of contact with the adjustment rod 81, the adjustment rod 81 is unlocked, and the lower end of the switching rod 10162 is in contact with the bottom of the synchronous limiting groove 1012, so that the lower end of the switching rod 10162 is locked with the synchronous connecting rod 1011 by friction. Then, the stabilizing block 10151 is inserted into the upper end of the switching baffle 10163 to keep the switching rod 10162 in this position. Finally, the fastening bolt on the synchronous block 9 is loosened to enable the synchronous block 9 to slide relative to the chassis 1.

[0057] When the position of the spray gun 6 needs to be adjusted according to the size of the inner diameter of the die casting mold, after the above preparation work is completed, the operator only needs to control the sliding of the adjusting sleeve 86 on the adjusting rod 81 to change the position of the spray gun 6 to extend, and at the same time, the transmission ratio of the driving shaft 31 and the driven shaft 32 is adjusted, so that the moving speed of the driven shaft 32 driving the spray gun 6 can be synchronized and adjusted, so that the spray gun 6 can always ensure that the plasma thermal spraying nozzle area will not overlap or be missing when plasma thermal spraying is performed on different inner diameter die casting molds, ensuring the comprehensiveness and uniformity of single spraying; Here, taking the die casting mold with a larger inner diameter as an example, after the above preparation work is completed, the operator only needs to move the adjusting sleeve 86 to the right, so that the adjusting sleeve 86 moves to the right and extrudes the adjusting chamfer 85, and pushes the adjusting block 83 forward along the adjusting chamfer 85, the adjusting block 83 moves forward to further extend the adjusting rod 81, until the spray gun 6 moves to the appropriate position of the die casting mold and stops; During the movement of the adjusting sleeve 86, the adjusting sleeve 86 will drive the synchronous limit rod 1015 and the switching rod 10162 to move synchronously to the right, the switching rod 10162 moves to drive the synchronous connecting rod 1011, the synchronous block 9, the driving rod 1013 and the driven rod 1014 to move to the right, so that the driving rod 1013 and the driven rod 1014 drive the moving driving cone 331 and the moving driven cone 334 to move to the right, so that the rotating radius of the steel belt 335 at the driving shaft 31 becomes smaller, and the rotating radius of the steel belt 335 at the driven shaft 32 becomes larger, so that in the subsequent operation of the permanent magnet synchronous motor, the speed of the driven shaft 32 becomes slower under the condition that the speed of the driving shaft 31, the chuck 2 and the die casting mold does not change, so that the speed of the connecting sleeve 343 and the driven lead screw 4 driven by the driven shaft 32 becomes slower, and finally the moving speed of the moving frame 51 connected with the driven lead screw 4 becomes slower, so that the moving speed of the spray gun 6 on the moving frame 51 can be relatively slow when spraying the die casting mold with a larger hole diameter, so as to achieve the effect of no missing or over-spraying in plasma thermal spraying.

[0058] After adjusting the position of the adjusting sleeve 86, the operator only needs to tighten the fastening bolt on the synchronization block 9 again to fix the synchronization block 9 with the chassis 1, then pull out the stabilizing block 10151 to move to the side of the switching baffle 10163, so that the switching baffle 10163 moves upward under the action of the switching elastic member 10164, and then the switching rod 10162 moves upward, the lower end of the switching rod 10162 is separated from the contact with the synchronization limiting groove 1012, and the upper end of the switching rod 10162 is in abutment and locking with the lower end of the adjusting rod 81, realizing the fixation of the position of the spray gun 6, at the same time, when the driven screw rod 4 drives the spray gun 6 to move, the switching rod 10162 will not rub with the synchronization limiting groove 1012 to affect the movement, then the operator opens the permanent magnet synchronous motor to drive the main shaft 31 to rotate, the main shaft 31 drives the chuck 2 and the die casting mold to rotate, and the main shaft 31 drives the driven shaft 32 to rotate under the transmission of the transmission, and then the connecting sleeve 343 and the driven screw rod 4 rotate to drive the spray gun 6 to move, realizing the rotation of the die casting mold and the movement of the spray gun 6 during the plasma thermal spraying, and realizing the spraying and maintenance of the inner wall of the die casting mold, when the spraying thickness is not enough once, the operator only needs to reverse the permanent magnet synchronous motor to make the spray gun 6 move in the opposite direction again, and the reciprocating multiple times can meet the demand of the spraying thickness, ensuring the stability and uniformity of the plasma thermal spraying, and the phenomenon of overlapping spraying or missing spraying does not occur, improving the spraying quality and ensuring the maintenance effect.

[0059] In the plasma thermal spraying of a larger or overall longer die casting mold, the die casting mold will accumulate more heat due to the longer spraying time, so when the die casting mold accumulates a certain amount of heat, it needs to be cooled in time. When the temperature of the die casting mold is too high, the temperature sensor on the chuck 2 will send a temperature abnormality signal, and the cooling system will start to work to cool the die casting mold by spraying compressed air. At the same time, the telescopic air cylinder starts to work to drive the connecting block 342 to move to the right, and the connecting block 342 drives the connecting sleeve 343 to move to the right, and the connecting sleeve 343 is disconnected from the slide key of the driven shaft 32, so that when the driven shaft 32 rotates, it cannot drive the connecting sleeve 343 to rotate, the driven screw 4 rotates, and further cannot drive the spray gun 6 to move; When the connecting block 342 moves to the right, the connecting block 342 will push the horizontal push block 1022 to the right, and the horizontal push block 1022 moves to the right and contacts the longitudinal push angle 10241, and pushes the longitudinal push block 1024 and the longitudinal push plate 1025 backward along the longitudinal push angle 10241. When the longitudinal push plate 1025 moves backward, the rear end of the longitudinal push plate 1025 will abut against the front end of the friction baffle 1030, and drive the friction baffle 1030 to move backward to extrude the friction elastic member 1029. When the friction baffle 1030 moves backward, it will drive the friction block 1027 to move backward, and the friction block 1027 moves backward and abuts against the front end of the switching rod 10162, thereby making the switching rod 10162 be abutted and locked by the friction block 1027, and finally realizing the locking of the left and right moving directions of the spray gun 6, and realizing that when the cooling system cools the die casting mold, the die casting mold can continue to rotate under the drive of the driving shaft 31, realizing omnidirectional cooling while making the spray gun 6 stop working and remain in the original position, facilitating re-spraying after cooling, and avoiding repeated spraying areas.

[0060] When the cooling is finished and the plasma thermal spraying of the die casting mold needs to be continued, because the switching rod 10162 is locked by the friction block 1027 during the cooling, and the synchronization block 9 is fixed on the base frame 1 by the fastening bolt, the upper end of the switching rod 10162 is always in contact with the adjusting rod 81, so that the synchronization block 9, the switching rod 10162, the adjusting rod 81, the spray gun 6, the adjusting frame and the driven screw rod 4 all remain in the fixed state, the driven screw rod 4 cannot rotate, and further the connecting sleeve 343 cannot rotate, so that the sliding key at the left end of the connecting sleeve 343 always remains at the position before the cooling. When the cooling is finished, the telescopic cylinder extends to the left to drive the connecting block 342 to move to the left, the connecting block 342 drives the connecting sleeve 343 to move to the left, when the connecting sleeve 343 moves to the left, the sliding key of the connecting sleeve 343 will abut against the right end surface of the driven shaft 32 first, at this time, the longitudinal push chamfer 10241 is still at the rear end of the horizontal push block 1022, and the longitudinal push plate 1025 still pushes the friction baffle 1030 to make the friction block 1027 lock with the switching rod 10162. When the driven shaft 32 rotates to make the key groove on the driven shaft 32 coincide with the sliding key of the connecting sleeve 343, the connecting sleeve 343 moves to the left along the key groove until the connecting block 342 is completely reset, at this time, the driven screw rod 4 resumes the rotation, and the horizontal push block 1022 also completely moves to the left end of the longitudinal push chamfer 10241, the longitudinal push block 1024, the longitudinal push plate 1025, the friction baffle 1030 and the friction block 1027 are reset forward under the action of the friction elastic member 1029, the friction block 1027 is separated from the contact with the switching rod 10162, and the switching rod 10162 is unlocked again, so that the spray gun 6 can continue to move leftward and rightward under the driving of the driven screw rod 4. The key groove on the driven shaft 32 and the spline on the connecting sleeve 343 are only provided with one, and the special design of the transmission ratio of the driving shaft 31 and the transmission shaft can make the connecting sleeve 343 be connected with the driven shaft 32 again, so that the die casting mold at the driving shaft 31 can always return to the position before the cooling of the spray gun 6, which is convenient for continuing the spraying, prevents the spraying area from being repeated when the spraying is continued, and can cool in time when the plasma thermal spraying is overheated, and can also ensure that the spray gun 6 can continue to spray at the position before the cooling after the cooling is finished, so that the continuity and uniformity of the plasma thermal spraying can be ensured, and the spraying quality is improved.

[0061] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, not limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. An automated thermal spraying robot for die-casting mold maintenance, comprising a base frame (1), wherein a clamping plate (2) is provided on the base frame (1), characterized in that: The system includes a drive component (3), a driven lead screw (4), a moving component (5), a spray gun (6), an adjusting component (8), a synchronizing block (9), a synchronizing component (101), a cooling system, and a re-spray positioning component (102). The drive component (3) is mounted on the base frame (1) to drive the chuck (2) to rotate. The base frame (1) is equipped with a rotating bracket (11). The driven lead screw (4) is connected to the rotating bracket (11). The moving component (5) is connected between the spray gun (6) and the driven lead screw (4) to drive the spray gun (6) to move when the driven lead screw (4) rotates. The adjusting component (8) is used to adjust the extension length of the spray gun (6). The base frame (102) is mounted on the base frame (102). The base frame (1) is provided with a synchronous slide groove (12), and the synchronous block (9) is slidably connected in the synchronous slide groove (12). The synchronous component (101) is provided on the synchronous block (9), which is used to adjust the transmission ratio of the driven screw (4) in conjunction with the drive component (3) when adjusting the extension length of the spray gun (6). The cooling system is provided on the base frame (1), which is used to cool the die casting mold while rotating it in conjunction with the drive component (3) when the die casting mold temperature is too high. The re-spray positioning component (102) is provided at the lower end of the driven screw (4), which is used to fix the spray gun (6) in conjunction with the synchronous component (101) when the die casting mold is cooled, and to reset the die casting mold to the position before cooling after cooling is completed.

2. The automated thermal spraying robot for die-casting mold maintenance according to claim 1, characterized in that: The drive component (3) includes a drive shaft (31), a driven shaft (32), a gearbox, and a connecting unit (34). The left ends of the drive shaft (31) and the driven shaft (32) are rotatably connected to the base frame (1). The right end of the drive shaft (31) is fixedly connected to the chuck (2). The gearbox is set on the drive shaft (31) and the driven shaft (32). The connecting unit (34) is set on the right end of the driven shaft (32) and is used to connect the driven shaft (32) to the driven lead screw (4) during thermal spraying.

3. The automated thermal spraying robot for die-casting mold maintenance according to claim 2, characterized in that: The connecting unit (34) includes a connecting groove (341), a connecting block (342), a connecting sleeve (343), a connecting rod (344), and a connecting slot (345). The connecting groove (341) is opened on the base frame (1). The connecting block (342) is slidably connected in the connecting groove (341). The connecting sleeve (343) is rotatably connected to the connecting block (342). The left end of the connecting sleeve (343) is connected to the right end of the driven shaft (32) via a sliding key. The connecting rod (344) is located at the right end of the connecting sleeve (343). The connecting rod (344) is polygonal in shape. The connecting slot (345) is opened at the left end of the driven lead screw (4). The connecting rod (344) is inserted into the connecting slot (345).

4. The automated thermal spraying robot for die-casting mold maintenance according to claim 1, characterized in that: The movable component (5) includes a movable frame (51), a movable limiting rod (52), and a movable limiting groove (53). The movable limiting groove (53) is opened on the base frame (1). The movable limiting rod (52) is slidably connected in the movable limiting groove (53). The movable frame (51) is fixed on the movable limiting rod (52). The movable frame (51) is provided with a lead screw groove. The movable frame (51) moves in cooperation with the driven lead screw (4) through the lead screw groove.

5. The automated thermal spraying robot for die-casting mold maintenance according to claim 3, characterized in that: The adjusting component (8) includes an adjusting rod (81), an adjusting groove (82), an adjusting block (83), an adjusting spring (84), an adjusting chamfer (85), and an adjusting sleeve (86). The adjusting rod (81) is fixedly connected to the moving frame (51). The adjusting groove (82) is opened inside the adjusting rod (81). The adjusting block (83) is slidably connected inside the adjusting groove (82). The spray gun (6) is fixed to the front end of the adjusting block (83). The two ends of the adjusting spring (84) are respectively connected to the front end of the adjusting block (83) and the inner wall of the adjusting rod (81). The adjusting chamfer (85) is set at the rear end of the adjusting block (83). The adjusting sleeve (86) is slidably connected to the outside of the adjusting rod (81). The right end of the adjusting sleeve (86) cooperates with the adjusting chamfer (85).

6. The automated thermal spraying robot for die-casting mold maintenance according to claim 5, characterized in that: The synchronization component (101) includes a synchronization link (1011), a synchronization limiting groove (1012), an active lever (1013), a driven lever (1014), a synchronization limiting rod (1015), and a switching unit (1016). The synchronization link (1011) is fixed to the right end of the synchronization block (9), the synchronization limiting groove (1012) is formed on the synchronization link (1011), and the active lever (1013) and driven lever (1014) are fixed to the synchronization block (9). At the upper end, the active lever (1013) and the driven lever (1014) are connected to the gearbox. The synchronous limit lever (1015) is fixed at the lower end of the adjusting sleeve (86). The lower end of the synchronous limit lever (1015) is slidably connected to the synchronous limit groove (1012). The switching unit (1016) is set inside the synchronous limit lever (1015). The switching unit (1016) is used to change the synchronization state of the synchronous connecting rod (1011) and the synchronous limit lever (1015).

7. The automated thermal spraying robot for die-casting mold maintenance according to claim 6, characterized in that: The switching unit (1016) includes a switching groove (10161), a switching rod (10162), a switching baffle (10163), and a switching spring (10164). The switching groove (10161) is opened in the synchronous limiting rod (1015). The switching rod (10162) is slidably connected in the switching groove (10161). The switching baffle (10163) is set on the side of the switching rod (10162). The two ends of the switching spring (10164) abut against the lower end of the switching baffle (10163) and the inner wall of the synchronous limiting rod (1015), respectively. Friction particles are provided at both the upper and lower ends of the switching rod (10162). The upper end of the switching rod (10162) cooperates with the lower end of the adjusting rod (81), and the lower end of the switching rod (10162) cooperates with the bottom of the synchronous limiting groove (1012).

8. The automated thermal spraying robot for die-casting mold maintenance according to claim 7, characterized in that: The synchronizing limit rod (1015) is slidably connected to a stabilizing block (10151) on its side, and the lower end of the stabilizing block (10151) cooperates with the upper end of the switching baffle (10163).

9. The automated thermal spraying robot for die-casting mold maintenance according to claim 1, characterized in that: The cooling system uses compressed air to cool the non-coated areas on the outer surface of the die-casting mold.

10. The automated thermal spraying robot for die-casting mold maintenance according to claim 7, characterized in that: The re-spray positioning component (102) includes a horizontal push groove (1021), a horizontal push block (1022), a vertical push groove (1023), a vertical push block (1024), a vertical push plate (1025), a friction groove (1026), a friction block (1027), a friction rod (1028), a friction spring (1029), and a friction baffle (1030). The horizontal push groove (1021) is located on the right side of the connecting groove (341), and the horizontal push block (1022) is slidably connected to the connecting groove (341). The left end of the horizontal push block (1022) is fixedly connected to the right end of the connecting block (342). The vertical push groove (1023) is located at the rear end of the horizontal push groove (1021), and the vertical push block (1024) is slidably connected to the vertical push groove (341) within the vertical push groove (1023). The front end of the vertical push block (1024) is provided with a vertical push chamfer (10241). The longitudinal push chamfer (10241) is engaged with the right end of the transverse push block (1022). The longitudinal push plate (1025) is fixed to the rear end of the longitudinal push block (1024). The friction groove (1026) is opened in the synchronous connecting rod (1011). The friction block (1027) is slidably connected in the friction groove (1026). The friction rod (1028) is fixedly connected to the front end of the friction block (1027). The friction baffle (1030) is set on the outer side of the front end of the fixed connecting rod. The friction baffle (1030) is connected to the friction rod (1028). The two ends of the friction spring (1029) abut against the rear end of the friction baffle (1030) and the front end of the fixed connecting rod, respectively. The front end of the friction baffle (1030) is engaged with the rear end of the longitudinal push plate (1025). The rear end of the friction block (1027) is engaged with the switching rod (10162).

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