An automatic spraying and baking equipment for high-power corrugated resistors

Abstract

The present invention relates to the technical field of resistance processing equipment, and particularly relates to an automatic spraying and baking equipment for high-power corrugated resistors, which includes a workbench, as well as a painting station and a baking station located on the workbench. The workbench is also provided with a circulating conveying system, which includes a conveying track, a plurality of fixtures rotatably installed on the conveying track for placing resistors, and a conveying driving mechanism for driving the conveying track to move, so as to drive the plurality of fixtures to sequentially pass through the painting station and the baking station; the painting station includes a water curtain cabinet, as well as a rotating mechanism located in the water curtain cabinet for driving the fixture to rotate, a paint spraying gun facing the fixture, and an azimuth adjusting mechanism for adjusting the orientation of the spraying gun; the baking station includes a self-leveling area, a heating area, a baking oven area, and a cooling area arranged in sequence. The self-leveling area is at room temperature, the temperature of the baking oven area is higher than that of the heating area, and a blanking area is arranged behind the cooling area. It realizes the integrated production of spraying and baking the insulating paint on the surface of high-power corrugated resistors.

Description

Technical Field

[0001] The present invention relates to the technical field of resistance processing equipment, and particularly relates to a high-power corrugated resistor automatic spraying and baking equipment. Background Art

[0002] Currently, Figure 6 As shown, the bellows (ceramic tube) of the high-power corrugated resistor is cylindrical. The process of its surface insulation layer generally adopts two processes: spraying and immersion. Before this century, most power resistor manufacturing enterprises used immersion equipment for painting. The equipment was relatively simple, but it was difficult to control the paint thickness. At the same time, personnel needed to work closely, and the paint was extremely harmful to the human body, resulting in most people being reluctant to engage in painting work. The spraying method has the advantages of uniform spraying, easy thickness control, and remote control compared with the immersion method, and has gradually become popular in recent years.

[0003] Currently, the paint drying adopts the method of baking in an independent industrial oven. Spraying and baking use independent equipment respectively. A certain number of transfer racks are required during the connection process. The loading and unloading of the transfer, and the pushing and pulling of the product into and out of the oven pose uncontrollable risks to product quality, production process, and manufacturing cost. Summary of the Invention

[0004] In view of the above technical problems in the prior art, the present invention provides a high-power corrugated resistor automatic spraying and baking equipment, which integrates automatic spraying and baking, and is an intelligent production equipment provided for controlling product quality, production process, and reducing manufacturing cost.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] Provide a high-power corrugated resistor automatic spraying and baking equipment, including a workbench, a painting station and a baking station located on the workbench. The workbench is also provided with a circulating conveying system, which includes a conveying track, a plurality of fixtures rotatably installed on the conveying track for placing resistors, and a conveying driving mechanism for driving the conveying track to move, so as to drive the plurality of fixtures to pass through the painting station and the baking station in sequence;

[0007] The painting station includes a water curtain cabinet, a rotating mechanism located in the water curtain cabinet for driving the fixture to rotate, a paint spray gun facing the fixture, and an azimuth adjusting mechanism for adjusting the orientation of the spray gun;

[0008] The baking station includes a self-leveling area, a heating-up area, a baking furnace area and a cooling area arranged in sequence. The self-leveling area is at room temperature. The temperature of the baking furnace area is higher than that of the heating-up area. A blanking area is arranged behind the cooling area.

[0009] Specifically, the heating-up area includes a heating-up zone 1 and a heating-up zone 2 for temperature increase. The baking furnace area includes a baking furnace zone 1 and a baking furnace zone 2 for temperature increase.

[0010] Specifically, the temperature in the first heating zone is 40°C to 60°C, the temperature in the second heating zone is 70°C to 90°C, the temperature in the first baking zone is 130°C to 150°C, and the temperature in the second baking zone is 190°C to 210°C.

[0011] Specifically, the jig includes a support shaft for vertically inserting the resistor, and a bearing and a driving wheel fixed to the support shaft. The support shaft is rotatably mounted on the conveyor track through the bearing, and the support shaft is provided with a plurality of steps with different diameters to accommodate resistors with different inner diameters to be inserted thereon.

[0012] Specifically, the rotating mechanism includes two or more rollers arranged in a row and a friction belt wound around the rollers. The friction belt rubs against the driving wheel of the passing jig to drive the support shaft to rotate.

[0013] Specifically, the azimuth adjustment mechanism includes a longitudinal driving mechanism for driving the paint spraying gun to move longitudinally, a transverse driving mechanism for driving the paint spraying gun to reciprocate transversely along the moving direction of the chain, and a swing driving mechanism for driving the paint spraying gun to swing up and down.

[0014] Specifically, the conveyor track is a chain, the workbench is provided with a rotatable steering sprocket, the chain is arranged on the workbench along a preset track via the steering sprocket, and the conveying driving mechanism includes a conveying motor and a driving sprocket fixed to the output shaft of the conveying motor. The driving sprocket engages with the chain.

[0015] Specifically, the segments of the chain located in the self-leveling zone, the heating zone, the baking zone and the cooling zone are continuously bent, and the number of the bent segments is relied on to determine the residence time in the corresponding zone.

[0016] Specifically, the self-leveling zone, the heating zone, the baking zone and the cooling zone are respectively provided with outer covers, and adjacent zones are isolated by heat-insulating and heat-preserving rock wool boards, with openings left for the conveyor track and the jig to pass through.

[0017] Specifically, the outer cover of the baking zone includes a steel plate layer on the outside, a rock wool layer in the middle and a stainless steel layer on the inside.

[0018] Advantages of the present invention:

[0019] A high-power corrugated resistor automatic spraying and baking equipment of the present invention, compared with the prior art, 1. realizes the integrated production of spraying and baking the surface insulating paint of high-power corrugated resistors, omits the existing intermediate turnover rack, eliminates the potential quality problems caused by humans and machines, and reduces the labor cost. 2. Compared with the current independent operation mode of painting and baking, the efficiency of the integrated production equipment is improved; 3. The innovative circulating curve conveying system technology of the present invention reduces the space occupied by the current high-power corrugated resistor spraying and baking process. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of a high-power corrugated resistor automatic spraying and baking equipment in the embodiment.

[0021] Figure 2 It is a top view of a high-power corrugated resistor automatic spraying and baking equipment in the embodiment.

[0022] Figure 3 It is a front view of a high-power corrugated resistor automatic spraying and baking equipment in the embodiment.

[0023] Figure 4 It is a schematic diagram of the painting station in the embodiment.

[0024] Figure 5 It is a schematic diagram of the cooperation between the fixture and the corrugated resistor in the embodiment.

[0025] Figure 6 It is a schematic diagram of the corrugated resistor to be painted and baked.

[0026] Reference numerals:

[0027] Workbench 1, blanking area 110, loading area 120;

[0028] Circulating conveyor system 2, conveyor track 21, steering sprocket 22, conveyor motor 23, driving sprocket 24, tensioning system 25;

[0029] Fixture 3, support shaft 31, bearing 32, driving wheel 33;

[0030] Corrugated resistor 4, water curtain cabinet 5;

[0031] Rotating mechanism 6, roller 61, friction belt 62;

[0032] Paint gun 7, azimuth adjustment mechanism 8;

[0033] Self-leveling area 9, heating area 10, heating area 101, heating area 102, baking oven area 12, baking oven area 121, baking oven area 122, cooling area 13;

[0034] Air-cooled fan 14, outer cover 15, heat-insulating and heat-preserving rock wool board 16, electric heating tube 17, air supply motor 18. Detailed implementation manners

[0035] The present invention will be described in detail below in conjunction with specific embodiments and the accompanying drawings.

[0036] A high-power corrugated resistor automatic spraying and baking equipment in this embodiment uses an automatic spraying process and a tunnel-type assembly line baking oven for painting and baking the high-power corrugated resistor. Through an innovatively designed integrated circulation conveying system, the spraying process and the baking process are seamlessly connected, including a reciprocating automatic spraying system, a non-standard tunnel furnace baking line, a product placement stepped universal fixture, a multi-temperature section intelligent control system, etc.

[0037] Specifically, as Figures 1 to 5 shown, it includes a workbench 1, as well as a painting station and a baking station located on the workbench 1. The workbench 1 is also provided with a circulation conveying system 2, which includes a conveying track 21, a plurality of fixtures 3 rotatably installed on the conveying track 21 for placing resistors, and a conveying driving mechanism for driving the movement of the conveying track 21 to drive the plurality of fixtures 3 to pass through the painting station and the baking station in sequence.

[0038] In this embodiment, the conveying track 21 is a chain. The workbench 1 is provided with a rotatable steering sprocket 22. The chain is arranged on the workbench 1 along a preset trajectory via the steering sprocket 22. The conveying driving mechanism includes a conveying motor 23 and a driving sprocket 24 fixed to the output shaft of the conveying motor 23. The driving sprocket 24 engages with the chain. In this way, the conveying motor 23 drives the driving sprocket 24 to rotate to drive the chain to move, thereby driving the plurality of fixtures 3 to move, and integrally connecting the paint spraying system and the baking tunnel furnace line. The driving track adopts a curved reciprocating layout design during the baking stage, improving the energy utilization rate on the basis of reducing the space. A tensioning system 25 is also provided on the workbench 1. It uses a direct-connected variable-frequency motor with a turbine reducer as the driving force and is equipped with an existing weight-type tensioning device to adjust the tension of the chain. A loading area 120 is arranged beside the workbench 1.

[0039] The fixture 3 includes a support shaft 31 for the resistor to be vertically inserted thereon, as well as a bearing 32 and a driving wheel 33 fixed to the support shaft 31. The support shaft 31 is rotatably installed on the conveying track 21 through the bearing 32. The top of the support shaft 31 is provided with a plurality of steps with different diameters to adapt to resistors with different inner diameters inserted thereon. Specifically, there are 7 types of porcelain tube inner diameters Ф40 - Ф110mm for the corrugated resistor 4. The stepped straight rod fixture 3 can be common to all corrugated resistors 4, making the adaptability relatively wide.

[0040] The painting station includes a water curtain cabinet 5, as well as a rotating mechanism 6 for driving the fixture 3 to rotate in the water curtain cabinet 5, a paint spraying gun 7 facing the fixture 3, and an azimuth adjusting mechanism 8 for adjusting the orientation of the spray gun. The water curtain cabinet 5 is characterized in that it can directly hit the remaining paint powder during painting into the pool or the water curtain surface, and the odor generated during painting and a small amount of unabsorbed paint powder are filtered through multiple water curtain curtains and discharged outside the painting room by an exhaust fan, thus playing a role in purifying the painting working environment and protecting personal health, and also enhancing the surface finish of the painted workpiece.

[0041] Specifically, the rotating mechanism 6 includes two or more rollers 61 arranged in a row and a friction belt 62 wound around the rollers 61. The friction belt 62 rubs against the driving wheel 33 of the passing fixture 3 to drive the support shaft 31 to rotate, driving the fixture 3 to rotate at the painting station. The orientation adjustment mechanism 8 includes a longitudinal driving mechanism (not shown in the figure, and actually a conventional driving mechanism such as a cylinder or a screw-nut mechanism can be used) that drives the paint spray gun 7 to move longitudinally, a transverse driving mechanism (not shown in the figure, and actually a conventional driving mechanism such as a cylinder or a screw-nut can be used similarly) that drives the paint spray gun 7 to reciprocate horizontally along the moving direction of the chain, and a swinging driving mechanism that drives the paint spray gun 7 to swing up and down. Specifically, an electric motor driving a belt is used to drive the swing. The figure also shows a structure that drives the rotating mechanism 6 to approach or move away from the fixture 3. Relying on the movement of the chain to drive the fixture 3 to move, when the friction belt 62 approaches and adheres to the roller 61, the roller 61 can be driven to rotate by the frictional force.

[0042] The baking station includes a self-leveling area 9, a heating-up area 10, a baking oven area 12, and a cooling area 13 arranged in sequence. Specifically, the segments of the chain located in the self-leveling area 9, the heating-up area 10, the baking oven area 12, and the cooling area 13 are continuously bent and arranged, and the number of the bent segments is relied on to determine the residence time in the corresponding area. The self-leveling area 9 is a normal-temperature area, and the self-leveling area 9 allows the paint to dry naturally in the shade. The temperature of the baking oven area 12 is higher than that of the heating-up area 10. A blanking area 110 is arranged behind the cooling area 13. The heating-up area 10 is a medium-low temperature baking area, and the baking oven area 12 is a medium-high temperature baking area. Two air-cooling fans 14 are installed on the top of the cooling area 13 to force-air-cool the resistor after baking. The self-leveling area 9, the heating-up area 10, the baking oven area 12, and the cooling area 13 are respectively provided with an outer cover 15, and adjacent areas are isolated by a heat-insulating and heat-preserving rock wool board 16, with an opening left for the conveying track 21 and the fixture 3 to pass through. Each area is provided with an electric heating tube 17 and a air-circulating motor 18, and the temperature control of each area is independent. Specifically, the outer cover 15 of the baking oven area 12 includes a steel plate layer on the outside, a rock wool layer in the middle, and a stainless steel layer on the inside.

[0043] Specifically, the heating-up area 10 includes a heating-up area one 101 with a temperature increase and a heating-up area two 102. The baking oven area 12 includes a baking oven area one 121 with a temperature increase and a baking oven area two 122. The temperature of the heating-up area one 101 is 40°C to 60°C, the temperature of the heating-up area two 102 is 70°C to 90°C, the temperature of the baking oven area one 121 is 130°C to 150°C, and the temperature of the baking oven area two 122 is 190°C to 210°C.

[0044] In one implementation, during specific operation:

[0045] First, at the loading area 120, a robot or a worker places the bellows of the high-power resistor vertically on the fixture 3. It is only necessary to confirm that the inner hole at the bottom of the bellows is sleeved with the corresponding stepped outer cylinder of the fixture 3. The conveying chain moves the fixture 3 with the sleeved bellows to the left. The steering sprocket 22 turns the fixture 3 by 90 degrees. When the position is transferred to the spraying area of the water curtain cabinet 5, when the bellows inductor senses that the bellows is sleeved on the fixture 3, the program control system starts the four-axis following system of the spray gun (rotation depends on the action of the friction belt 62 and the roller 61, up and down depends on the action of the longitudinal driving mechanism, left and right reciprocation depends on the transverse driving mechanism, and up and down angle depends on the swing driving mechanism). At the same time, the oil pressure painting device is started, and the spray gun 7 is aligned with the bellows for full outer surface painting work.

[0046] After the spraying is completed (the time and the spray gun trajectory can be set intelligently), the following system of the spray gun 7 resets and waits for the next repeated action. The painted bellows and its fixture 3 continue to move with the chain and are transferred. After a certain time, they reach the self-leveling area of the tunnel furnace baking line. In the self-leveling area 9, the fixture 3 is arranged in a curve and reciprocates. The chain reciprocates 6 times in the self-leveling area 9. The bellows stays in the self-leveling area for 15 minutes, allowing the ethylene glycol monobutyl ether in the paint to naturally volatilize and dry.

[0047] The bellows fixture 3 moves with the chain from the self-leveling area to the first heating zone 101. In the first heating zone 101, it reciprocates in a curve with the chain 6 times. The bellows stays in the first heating zone 101 for 15 minutes, and the set temperature is 50°C.

[0048] The bellows fixture 3 moves with the chain from the first heating zone 101 to the second heating zone 102. In the second heating zone 102, it reciprocates in a curve with the chain 6 times. The bellows stays in the second heating zone 102 for 15 minutes, and the set temperature is 80°C.

[0049] The bellows fixture 3 moves with the chain from the second heating zone 102 to the first baking zone 121. In the first baking zone 121, it reciprocates in a curve with the chain 10 times. The bellows stays in the first baking zone 121 for 25 minutes, and the set temperature is 140°C.

[0050] The bellows fixture 3 moves with the chain from the first baking zone 121 to the second baking zone 122. In the second baking zone 122, it reciprocates in a curve with the chain 10 times. The bellows stays in the second baking zone 122 for 25 minutes, and the set temperature is 200°C.

[0051] The bellows fixture 3 moves with the chain from the second baking zone 122 to the cooling zone 13. In the cooling zone 13, it reciprocates in a curve with the chain 6 times. The bellows stays in the cooling zone 13 for 15 minutes. The cooling zone 13 cools the bellows in a high-temperature state to room temperature.

[0052] The bellows treatment tool 3 moves from the cooling area 13 to the blanking area 110 along with the chain. The robot or manual labor takes away the cooled bellows and it flows into the next process. The empty treatment tool 3 continues to be conveyed along with the return chain, returns to the feeding area 120, and completes an automatic spraying and baking process.

[0053] In the description of the present invention, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] The standard parts used in the present invention can all be purchased from the market. The special-shaped parts can be customized according to the description of the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, welding, etc. that are mature in the prior art. The machines, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be elaborated here.

[0055] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. An automatic spraying and baking equipment for high-power corrugated resistors, characterized in that: It includes a workbench, a painting station and a baking station located on the workbench. The workbench is also provided with a circulating conveying system, which includes a conveying track, a plurality of jigs rotatably installed on the conveying track for placing resistors, and a conveying driving mechanism for driving the conveying track to move, so as to drive the plurality of jigs to pass through the painting station and the baking station in sequence; The painting station includes a water curtain cabinet, a rotating mechanism located in the water curtain cabinet for driving the jig to rotate, a paint gun facing the jig, and an azimuth adjusting mechanism for adjusting the orientation of the paint gun; The baking station includes a self-leveling area, a heating-up area, a baking oven area and a cooling area arranged in sequence. The self-leveling area is at normal temperature. The temperature of the baking oven area is higher than that of the heating-up area. A blanking area is arranged behind the cooling area; The azimuth adjusting mechanism includes a longitudinal driving mechanism for driving the paint gun to move longitudinally, a transverse driving mechanism for driving the paint gun to reciprocate horizontally along the moving direction of the chain, and a swinging driving mechanism for driving the paint gun to swing up and down; The conveying track is a chain. The workbench is provided with a rotatable steering sprocket. The chain is arranged on the workbench along a preset track via the steering sprocket. The conveying driving mechanism includes a conveying motor and a driving sprocket fixed to the output shaft of the conveying motor. The driving sprocket engages with the chain.

2. The automatic spraying and baking equipment for high-power corrugated resistors according to claim 1, wherein: The heating-up area includes a heating-up area 1 and a heating-up area 2 with temperature rising. The baking oven area includes a baking oven area 1 and a baking oven area 2 with temperature rising.

3. The high-power corrugated resistor automatic spraying and baking equipment according to claim 2, characterized in that: The temperature of the heating-up area 1 is 40°C to 60°C, the temperature of the heating-up area 2 is 70°C to 90°C, the temperature of the baking oven area 1 is 130°C to 150°C, and the temperature of the baking oven area 2 is 190°C to 210°C.

4. A high-power corrugated resistor automatic spraying and baking device according to claim 1, characterized in that: The jig includes a support shaft for the resistor to be vertically inserted thereon, and a bearing and a driving wheel fixed to the support shaft. The support shaft is rotatably installed on the conveying track through the bearing. The support shaft is provided with a plurality of steps with different diameters to adapt to resistors with different inner diameters to be inserted thereon.

5. An automatic spraying and baking equipment for high-power corrugated resistors according to claim 4, characterized in that: The rotating mechanism includes two or more rollers arranged in a row and a friction belt wound around the rollers. The friction belt rubs against the driving wheel of the passing jig to drive the support shaft to rotate.

6. A high-power corrugated resistor automatic spraying and baking equipment according to claim 1, characterized in that: The sections of the chain located in the self-leveling area, the heating-up area, the baking oven area and the cooling area are continuously bent, and the number of the bent sections is relied on to determine the residence time in the corresponding area.

7. An automatic spraying and baking equipment for high-power corrugated resistors according to claim 1, characterized in that: The self-leveling area, the heating-up area, the baking oven area and the cooling area are respectively provided with outer covers. The adjacent areas are isolated by heat-insulating and heat-preserving rock wool boards, and openings for the conveying track and the jigs to pass through are left therein.

8. An automatic spraying and baking equipment for high-power corrugated resistors according to claim 7, characterized in that: The outer cover of the baking oven area includes a steel plate layer on the outside, a rock wool layer in the middle and a stainless steel layer on the inside.

Images