Cooling device for die-casting production line

Abstract

The utility model relates to a cooling device for a die-casting production line. The cooling device comprises a transfer mechanical arm, a feeding conveying belt for cooling, N cooling water tanks, a discharging conveying belt for cooling and a truss mechanical arm for cooling. The transfer mechanical arm is used for taking down the casting from the die-casting machine and transferring the casting to the feeding conveying belt for cooling; the feeding conveying belt for cooling is used for moving the casting to the cooling water tank side; the N cooling water tanks are linearly arranged, and a temperature sensor, a medicine concentration sensor and a heating device are arranged in each cooling water tank; the discharging conveying belt for cooling is used for moving the castings to the next working procedure side. The truss mechanical arm for cooling is used for transferring the casting among all the parts; the cooling device has the advantages that the multiple cooling water ponds are arranged, the temperatures of the cooling water ponds are set to be different, the cooling water ponds conform to a temperature change curve of a casting material, it is ensured that ideal microstructures and physical properties of die castings are kept in the cooling process, and the problems of deformation, cracks and the like are effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of die casting, especially to a cooling device for die casting production line. BACKGROUND

[0002] Die casting machine is a precision forming equipment for manufacturing metal parts, which forms the required shape and size by injecting molten metal liquid into the mold cavity. Die casting technology is widely used in automobile, aerospace, electronics, home appliances and other industries, because this process can efficiently produce parts with complex structure, high surface quality and high dimensional accuracy.

[0003] As shown in Figure 1 and Figure 2 , it is a schematic diagram of the structure of aluminum die casting equipment, including movable die and fixed die. The forming process of die casting is as follows: the furnace melts aluminum ingot, as shown in Figure 3 , the molten aluminum liquid is poured into the pushing cavity, the movable die and the fixed die are closed, and the pushing rod pushes the aluminum liquid in the pushing cavity between the fixed die and the movable die to form the required casting. After the casting is formed, it is taken down, cooled and sent to the edge removing station, and the edge removing process is performed by manual or machine (after the die casting is completed, the edge will have a ring of burrs or flash). After edge removal, it enters the polishing equipment for polishing and polishing. Finally, according to customer requirements, sand blasting and brightening are performed.

[0004] The above-mentioned equipment production line has the following defects: currently, the cooling of aluminum castings is mainly realized by water cooling and air drying, but the cooling speed has no good control method, and each type (material, structure, etc.) of die casting has a specific temperature change curve. Local cooling too fast or too slow will cause problems such as deformation and cracking.

[0005] Based on this, the present case is proposed. CONTENT OF THE UTILITY MODEL

[0006] The utility model aims at providing a cooling device for die casting production line to solve the problems in the background art.

[0007] In order to achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0008] A cooling device for die casting production line, comprising a transfer mechanical arm, a cooling upper feeding conveyor belt, N cooling water pools, a cooling lower feeding conveyor belt and a cooling truss mechanical arm.

[0009] The transfer mechanical arm is used to take down the casting from the die casting machine and transfer it to the cooling upper feeding conveyor belt.

[0010] The cooling upper feeding conveyor belt is used to move the casting to the side of the cooling water pool.

[0011] The N cooling water pools are arranged in a straight line, and each cooling water pool is equipped with a temperature sensor, a drug concentration sensor and a heating device. The temperature sensor is used to monitor the water temperature of the cooling water pool in real time, the drug concentration sensor is used to monitor the drug concentration of the cooling water pool in real time, and the heating device is used to heat the cooling water pool.

[0012] The cooling conveyor belt is used to move the casting to the next process side;

[0013] The cooling truss robotic arm can be vertically lifted and moved along the direction of the cooling water tanks. It is used to transfer castings on the cooling loading conveyor belt to the cooling water tanks, move the castings from one cooling water tank to the next, and finally transfer the castings from the cooling water tanks to the cooling unloading conveyor belt.

[0014] Furthermore, the cooling water pool is connected to a circulation pipeline, and a filter, a water supply pipe, and a chemical dosing pipe are installed on the circulation pipeline. The water in the cooling water pool is filtered to remove impurities, water is replenished through the water supply pipe, and the concentration of the drug is increased through the chemical dosing pipe.

[0015] Furthermore, the cooling conveyor belt is a mesh belt, and a water receiving tray and a drain pipe are provided below it.

[0016] Furthermore, it includes a cooling drying unit located above the cooling unloading conveyor belt for drying castings on the cooling unloading conveyor belt.

[0017] The advantages of this invention are as follows: By setting up multiple cooling water pools for cooling the die-cast parts, each with a different temperature setting that conforms to the temperature change curve of the casting material, it can ensure that the die-cast parts maintain ideal microstructure and physical properties during the cooling process, effectively avoiding problems such as deformation and cracks. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a die-casting machine in the prior art;

[0019] Figure 2 for Figure 1 Front view diagram;

[0020] Figure 3 for Figure 1 Enlarged diagram of part A in the diagram;

[0021] Figure 4 This is a schematic diagram of the layout of the die-casting production line in the embodiment;

[0022] Figure 5 This is a schematic diagram of the furnace system layout in the embodiment;

[0023] Figure 6This is a three-dimensional structural diagram of the tilting furnace in the embodiment;

[0024] Figure 7 This is a schematic diagram of the structure of the pushing chamber and the feeding filter section in the embodiment;

[0025] Figure 8 for Figure 7 A schematic diagram of the completed assembly;

[0026] Figure 9 This is a schematic diagram of the cooling water flow channel arrangement inside the push rod in the embodiment;

[0027] Figure 10 This is a schematic diagram of the feeding device in the embodiment;

[0028] Figure 11 This is a schematic diagram of the installation of the cooling and lubrication device on the die-casting machine in the embodiment;

[0029] Figure 12 This is a schematic diagram of the cooling and lubrication device in the embodiment;

[0030] Figure 13 for Figure 11 Enlarged schematic diagram of part B in the diagram;

[0031] Figure 14 This is a schematic diagram of the cooling device in the embodiment;

[0032] Figure 15 This is a schematic diagram of the cooling water tank of the cooling device in the embodiment.

[0033] Figure 16 , Figure 17 , Figure 18 , Figure 19 These are schematic diagrams of the grinding device from different perspectives in the embodiments;

[0034] Figure 20 and Figure 21 This is a schematic diagram showing the state in which the rear gate and filter plate of the grinding device are lifted in the embodiment;

[0035] Figure 22 This is a schematic diagram of the structure of the vibratory grinding device in the embodiment;

[0036] Figure 23 This is a three-dimensional structural diagram of the grinding tank in the embodiment;

[0037] Figure 24 This is a top view of the grinding tank in the embodiment, where the mesh ramp plate is not raised.

[0038] Figure 25 This is a schematic diagram of the structure of the closed material discharge plate at the bottom of the grinding tank in the embodiment;

[0039] Figure 26 Fig. 1 is a schematic view of a furnace system according to an embodiment of the present application; Figure 23 Fig. 2 is a schematic view of a furnace system according to another embodiment of the present application;

[0040] Figure 27 Fig. 3 is a schematic view of a driving structure of a mesh climbing plate according to an embodiment of the present application;

[0041] Figure 28 Fig. 4 is a schematic view of a mesh climbing plate according to an embodiment of the present application;

[0042] Legend of reference numerals

[0043] 1. Furnace system; 101. Furnace; 102. Holding furnace; 103. Turntable; 1031. Lifting base; 1032. Turntable; 1033. Filter screen; 1034. Electromagnet; 1035. Vibrator; 104. Spray cooling unit; 105. Waste liquid tank;

[0044] 2. Die casting machine; 201. Moving die; 202. Stationary die; 203. Feeding device; 2031. Pushing cavity; 2032. Pushing rod; 2033. Feeding mechanical arm; 2034. Outer cylinder; 2035. Inner cylinder; 2036. Filter screen replacing mechanical arm; 2037. Feeding filter screen; 2038. Lifting ring; 2039. Cooling water flow channel; 204. Frame; 205. Cooling and lubricating device; 2051. Cooling and lubricating rotating unit; 2052. Cooling and lubricating lifting unit; 2053. Cooling and lubricating seat; 2054. Cooling water spray head; 2055. Lubricant spray head; 2056. Air blowing port; 2057. Liquid receiving disc; 2058. Waste liquid discharge pipeline;

[0045] 3. Cooling device; 301. Transfer mechanical arm; 302. Cooling feeding conveyor belt; 303. Cooling water pool; 304. Cooling discharging conveyor belt; 305. Cooling air drying unit; 306. Cooling gantry mechanical arm; 307. Temperature sensor; 308. Drug concentration sensor; 309. Heating device; 310. Filter; 311. Water supplement pipeline; 312. Drug supplement pipeline;

[0046] 4. Polishing device; 401. Polishing cavity; 402. Polishing belt assembly; 403. Polishing driving part; 404. Water guide plate; 405. Water tank; 406. Water pump; 407. Backflow channel; 408. Waste chip groove; 409. Guard plate; 410. Fresh water groove; 411. Backflow hole; 412. Gate plate; 413. Filter plate; 414. Water outlet of water tank;

[0047] 5. Vibratory grinding device; 501. Feeding conveyor belt for cleaning; 502. Discharging conveyor belt for cleaning; 503. Cleaning tank; 504. Gantry robotic arm for cleaning; 505. Drying unit for cleaning; 506. Vibrating base; 507. Grinding tank; 508. Mesh plate; 509. Mesh ramp plate; 510. Guide hole; 511. Guide rail groove; 512. Discharge port; 513. Enclosed discharge plate; 5131. Filter section; 5132. Enclosed section; 5133. Open section;

[0048] 6. Edge removal device. Detailed Implementation

[0049] The present invention will be further described in detail below with reference to the embodiments. It should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" etc. indicated by the accompanying drawings are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0050] This embodiment proposes a die-casting production line, such as Figure 4 As shown, the process flow includes, in sequence, a furnace system 1, a die-casting machine 2, a cooling device 3, an edge-removing device 6, a grinding device 4, and a vibratory grinding device 5. After the aluminum ingot is melted into molten aluminum by the furnace system 1, it is poured into the die-casting machine 2 for die casting. The cast parts are first cooled, then hammered to remove the edges, and then polished. Finally, according to customer requirements, they undergo a brightening treatment in the vibratory grinding device 5.

[0051] like Figure 5 and Figure 6 As shown, the furnace system 1 includes a tiltable furnace 101, a holding furnace 102, a turntable 103, a spray cooling unit 104, and a waste liquid tank 105. The turntable 103 includes a liftable base 1031 and a turntable 1032 located above the base. The holding furnace 102 and the waste liquid tank 105 are located on opposite sides of the turntable 103. A pocket-shaped filter screen 1033 is installed on the turntable 1032 and can be positioned above the holding furnace 102 or the waste liquid tank 105. The furnace 101 is located on one side of the holding furnace 102. After the furnace 101 is tilted, the molten aluminum liquid is poured into the holding furnace 102 through the pocket-shaped filter screen 1033. The spray cooling unit 104 is located above the waste liquid tank 105 and is used to cool the pocket-shaped filter screen 1033.

[0052] The use of the furnace system 1 includes the following process: the worker puts the aluminum ingot into the furnace 101, the furnace 101 melts the aluminum ingot and then pours it out, at this time the bucket-shaped filter screen 1033 is driven by the rotating disc 1032 to be above the holding furnace 102, the aluminum liquid poured out passes through the bucket-shaped filter screen 1033 and then enters the holding furnace 102, most of the dregs in the aluminum liquid are left in the bucket-shaped filter screen 1033, the rotating disc 1032 rotates the bucket-shaped filter screen 1033 to be above the waste liquid tank 105, the spraying cooling unit 104 sprays water to cool the dregs, the waste liquid flows into the waste liquid tank 105, and the cooled dregs can be taken away for recycling.

[0053] As preferred, the base 1031 is provided with an electromagnet 1034 for attracting the rotating disc 1032, and the rotating disc 1032 is provided with a vibrator 1035 for vibrating the bucket-shaped filter screen 1033. After the electromagnet 1034 attracts the rotating disc 1032, the aluminum liquid can maintain the stability of the rotating disc 1032 during pouring, so as to avoid the tilting of the rotating disc 1032. The vibration of the bucket-shaped filter screen 1033 by the vibrator 1035 can promote the separation of the aluminum liquid and the dregs in the bucket-shaped filter screen 1033. Due to the provision of the vibrator 1035, the electromagnet 1034 can better maintain the stability of the rotating disc 1032.

[0054] The base 1031 is provided to be liftable, so that the rotating disc 103 can adapt to different models of the furnace 101.

[0055] As shown in Figures 7 to 10 The die casting machine 2 includes a feeding device 203, the feeding device 203 includes a pushing cavity 2031, a pushing rod 2032, a feeding mechanical arm 2033 and a filter screen replacement mechanical arm 2036, one end of the pushing cavity 2031 is open as an aluminum liquid outlet, the other end of the pushing cavity 2031 is open, the end of the pushing rod 2032 enters the inside of the pushing cavity 2031 through the end opening, and the top surface of the pushing cavity 2031 is open as an aluminum liquid inlet. The top surface opening of the pushing cavity 2031 is provided with an inlet filter part outside, the aluminum liquid is filtered through the inlet filter part and then enters the pushing cavity 2031, and the feeding mechanical arm 2033 is provided with a ladle (prior art, not shown in the figure), the feeding mechanical arm 2033 pours the aluminum liquid in the furnace system 1 into the pushing cavity 2031 by controlling the ladle.

[0056] The feeding filter part comprises an outer cylinder 2034 and an inner cylinder 2035. The outer cylinder 2034 is open at both top and bottom and hollow. The opening diameter of the outer cylinder 2034 at both ends is larger than the opening diameter of the top surface of the pushing cavity 2031. The lower part of the outer cylinder 2034 is fixed outside the top surface opening of the pushing cavity 2031. The inner cylinder 2035 can be exactly fitted into the hollow part of the outer cylinder 2034. The inner cylinder 2035 is open at both top and bottom and hollow. The opening diameter of the top end is larger than that of the bottom end. The opening diameter of the bottom end is equal to the opening diameter of the top surface of the pushing cavity 2031. The bottom end opening of the inner cylinder 2035 is fixed with a feeding filter screen 2037 in the hollow part of the inner cylinder 2035. The feeding filter screen 2037 is in the form of a circular truncated cone with the top smaller than the bottom. A lifting ring 2038 is arranged on the feeding filter screen 2037 and exposed outside the outer cylinder 2034. The filter screen replacing mechanical arm 2036 can disassemble and assemble the feeding filter screen 2037 by grabbing the lifting ring 2038. In addition, in order to prevent the aluminum liquid from splashing, the outer cylinder 2034 and the inner cylinder 2035 have a certain height, which is at least higher than the height of the pushing cavity 2031.

[0057] The use process of the feeding device 203 comprises the following steps. The inner cylinder 2035 is installed in the outer cylinder 2034. The feeding mechanical arm 2033 scoops the aluminum liquid in the holding furnace 102 with a ladle and pours it into the inner cylinder 2035. The aluminum liquid poured into the inner cylinder 2035 is filtered by the feeding filter screen 2037 and then enters the pushing cavity 2031. The dregs in the aluminum liquid are left in the inner cylinder 2035. The pushing rod 2032 pushes the aluminum liquid in the pushing cavity 2031 into the space between the movable die 201 and the fixed die 202. When the dregs in the inner cylinder 2035 are relatively large, the filter screen replacing mechanical arm 2036 lifts the inner cylinder 2035 by grabbing the lifting ring 2038 and then disassembles it. After cleaning the feeding filter screen 2037, the inner cylinder 2035 is installed in the outer cylinder 2034 again.

[0058] When the inner cylinder 2035 is installed, if the outer wall of the inner cylinder 2035 and the inner wall of the outer cylinder 2034 are straight arms, the inner cylinder 2035 will be stuck when it is tilted during the falling process, which will cause the installation to be out of place. In order to solve this defect, the inner diameter of the hollow part of the outer cylinder 2034 gradually decreases from the top to the bottom and forms an inverted circular truncated cone cavity. The outer diameter of the inner cylinder 2035 gradually decreases from the top to the bottom and forms an inverted circular truncated cone. With this design, the inner cylinder 2035 can be guided along the inner wall of the outer cylinder 2034 during the falling process, so that the sticking phenomenon can be avoided.

[0059] As preferred, the part of the push rod 2032 entering the push cavity 2031 is provided with an internal cooling water channel 2039, which forms a cooling water inlet and a cooling water outlet at the side wall of the push rod 2032. A cooling circulation pipeline is arranged inside the push rod 2032, which is used to properly reduce the temperature of the boiling metal liquid, preventing the die casting from being hollow due to the boiling of the metal liquid. Of course, the temperature of the cooling water should be appropriate, and should not excessively reduce the temperature of the aluminum liquid to ensure the quality of the die casting.

[0060] As shown in Figures 10 to 12 The die casting machine 2 comprises a frame 204, a movable die 201 and a fixed die 202, the frame 204 is provided with a cooling and lubricating device 205, the cooling and lubricating device 205 comprises a cooling and lubricating rotating unit 2051, a cooling and lubricating lifting unit 2052 and a cooling and lubricating seat 2053, the cooling and lubricating rotating unit 2051 is fixed on the frame 204, the rotating end of which is fixed with the cooling and lubricating lifting unit 2052, the lifting end of the cooling and lubricating lifting unit 2052 is fixed with the cooling and lubricating seat 2053, and the cooling and lubricating seat 2053 can be lowered into the space between the movable die 201 and the fixed die 202 after the two are separated. One side of the cooling and lubricating seat 2053 is provided with a cooling water nozzle 2054 and a blowing port 2056, and the opposite side is provided with a lubricant nozzle 2055 and a blowing port 2056. The inside of the cooling and lubricating seat 2053 is provided with a cooling water pipeline, a lubricating liquid pipeline and an air duct, the cooling water pipeline is used to supply external cooling water to the cooling water nozzle 2054, the lubricating liquid pipeline is used to supply external lubricating liquid to the lubricant nozzle 2055, and the air duct is used to supply air generated by an external fan to the blowing port 2056.

[0061] The bottom surface of the cooling and lubricating seat 2053 is provided with two liquid receiving discs 2057 located below the cooling water nozzle 2054 and the lubricant nozzle 2055 respectively, the outer side of the liquid receiving disc 2057 is just in contact with the side wall of the movable die 201 or the fixed die 202 after separation. The cooling and lubricating seat 2053 is provided with a cooling water recovery channel and a lubricating liquid recovery channel, the bottom surface of the liquid receiving disc 2057 is an inclined surface inclined to the side of the cooling and lubricating seat 2053, which is used to guide the cooling water in the disc into the cooling water recovery channel and guide the lubricating liquid in the disc into the lubricating liquid recovery channel.

[0062] The use process of the cooling and lubricating device 205 is as follows:

[0063] When the die casting is completed, the movable die 201 and the fixed die 202 are opened, and the casting is taken out, the cooling and lubricating lifting unit 2052 drives the cooling and lubricating seat 2053 to descend between the movable die 201 and the fixed die 202, at this time, the cooling water spray head 2054 is aligned with the movable die 201, and the lubricant spray head 2055 is aligned with the fixed die 202, the cooling water spray head 2054 sprays cooling water to cool the movable die 201, the sprayed cooling water is collected and guided through the liquid collecting disc 2057, and then enters the cooling water recovery flow channel;

[0064] After the movable die 201 is cooled, the cooling and lubricating rotating unit 2051 drives the cooling and lubricating seat 2053 to rotate, so that the cooling water spray head 2054 is aligned with the fixed die 202, and the lubricant spray head 2055 is aligned with the movable die 201, at this time, the air outlet 2056 on the side of the movable die 201 blows air to dry the movable die 201, after drying, the movable die 201 is sprayed with lubricating liquid for lubrication, and the liquid collecting disc 2057 below recovers the lubricating liquid to the lubricating liquid recovery flow channel; at this time, the cooling water spray head 2054 on the side of the fixed die 202 sprays cooling water to cool the fixed die 202, the sprayed cooling water is collected and guided through the liquid collecting disc 2057, and then enters the cooling water recovery flow channel;

[0065] After the movable die 201 is cooled, the cooling and lubricating rotating unit 2051 drives the cooling and lubricating seat 2053 to rotate, so that the cooling water spray head 2054 is aligned with the movable die 201, and the lubricant spray head is aligned with the fixed die 202, at this time, the air outlet 2056 on the side of the fixed die 202 blows air to dry the fixed die 202, after drying, the fixed die 202 is sprayed with lubricating liquid for lubrication, and the liquid collecting disc 2057 below recovers the lubricating liquid to the lubricating liquid recovery flow channel;

[0066] After the movable die 201 is cooled, the cooling and lubricating rotating unit 2051 drives the cooling and lubricating seat 2053 to rotate, so that the cooling water spray head 2054 is aligned with the movable die 201, and the lubricant spray head is aligned with the fixed die 202, at this time, the air outlet 2056 on the side of the fixed die 202 blows air to dry the fixed die 202, after drying, the fixed die 202 is sprayed with lubricating liquid for lubrication, and the liquid collecting disc 2057 below recovers the lubricating liquid to the lubricating liquid recovery flow channel;

[0067] Although the liquid collecting disc 2057 is arranged at the bottom of the cooling and lubricating seat 2053, lubricating liquid and cooling water will inevitably accumulate on the bottom surface between the movable die 201 and the fixed die 202 of the die casting machine 2. As preferred, as shown in Figure 13 , the die casting machine 2 is provided with a waste liquid tank and a waste liquid discharge pipeline 2058 on the bottom surface between the movable die 201 and the fixed die 202, for discharging the uncollected lubricating liquid and cooling water.

[0068] As shown in Figure 14 and Figure 15As shown, the cooling device 3 comprises a transfer robot 301, a cooling feeding conveyor 302, N cooling water pools 303, a cooling discharging conveyor 304, a cooling air-drying unit 305 and a cooling gantry robot 306. The transfer robot 301 is used to take the castings from the die casting machine 2 and transfer them to the cooling feeding conveyor 302. The cooling feeding conveyor 302 is used to move the castings to the side of the cooling water pools 303. The N cooling water pools 303 are arranged in a straight line, and each cooling water pool 303 is provided with a temperature sensor 307, a drug concentration sensor 308 and a heating device 309. The cooling water pool 303 is connected with a circulating pipeline, and the circulating pipeline is provided with a filter 310, a water supplement pipe 311 and a drug supplement pipe 312. The temperature sensor 307 is used to monitor the water temperature of the cooling water pool 303 in real time, and the drug concentration sensor 308 is used to monitor the drug concentration of the cooling water pool 303 in real time. The water in the cooling water pool 303 is filtered by the filter 310, supplemented by the water supplement pipe 311, supplemented by the drug supplement pipe 312, and heated by the heating device 309 to keep the water temperature of the cooling water pool constant at a set value. The cooling discharging conveyor 304 is used to move the castings to the side of the edge removing device, and the cooling discharging conveyor 304 is a mesh belt provided with a water collecting tray and a drain pipe below. The castings coming out of the cooling water pool 303 have a lot of water remaining on them, and the remaining water flows into the water collecting tray through the mesh of the conveyor belt and is discharged through the drain pipe. The cooling air-drying unit 305 is located above the cooling discharging conveyor 304 and is used to air-dry the castings on the cooling discharging conveyor 304. The cooling gantry robot 306 can vertically lift and move along the arrangement direction of the cooling water pools 303, and is used to transfer the castings on the cooling feeding conveyor 302 to the cooling water pools 303, move the castings from the previous cooling water pool 303 to the next cooling water pool 303, and finally transfer the castings from the cooling water pool 303 to the cooling discharging conveyor 304.

[0069] For the cooling of the die castings, a plurality of cooling water pools 303 are provided, and the temperature of each cooling water pool 303 is set differently. The temperature setting needs to meet the temperature change curve of the casting material, which can ensure that the die castings maintain the ideal microstructure and physical properties during the cooling process, effectively avoiding the occurrence of problems such as deformation and cracking. The temperature setting process of each cooling water pool 303 is as follows:

[0070] The water temperature Ti of the i-th cooling water pool 303 is calculated by the following formula:

[0071] Ti = a * T env + (T0-T -k(i*Δt) )e env + b;

[0072] Wherein, a is a proportional adjustment coefficient, which is a constant; b is an offset adjustment coefficient, which is a constant. By introducing the adjustment coefficients, the actual temperature change curve of the casting can be more accurately fitted;

[0073] T0 is the initial temperature of the casting before cooling; T env is the ambient temperature; e is the base of the natural logarithm, which is approximately equal to 2.71828; k is the thermal conductivity of the casting;

[0074] t is time, Δt = t total / N, t total represents the total cooling time, t total =-1 / k*ln((T f -T env ) / (T0-T env )); T f is the final temperature of the casting after cooling.

[0075] After the casting is cooled and output in the cooling device 3, manual edge removal is performed in the knocking edge removal device, and then polishing is performed in the polishing device 4. The knocking edge removal device in the embodiment is realized by using an existing device, but for the polishing device 4, in order to realize the processing of the debris generated by polishing, the applicant has developed a new structure, as shown in Figures 16 to 21 .

[0076] The polishing device 4 includes a polishing cavity 401, a polishing belt assembly 402, a polishing drive part 403, a water guide plate 404, a water tank 405, a water pump 406, a backflow channel 407, a debris tank 408, a guard plate 409, and a clean water tank 410. The water guide plate 404 is placed vertically, the upper part thereof is a vertical plate extending to the top of the polishing cavity 401, the lower part thereof is a horizontal plate extending to the bottom of the polishing cavity 401, the middle part thereof is an arc surface, and the arc surface is provided with a backflow hole 411. The polishing belt assembly 402 is installed in the polishing cavity 401 and is driven to operate by the polishing drive part 403, and the polishing belt assembly 402 is located on the front side of the water guide plate 404. The debris tank 408 is located on the rear side of the water guide plate 404, the two ends of the backflow channel 407 are respectively communicated with the backflow hole 411 and the debris tank 408, the side part of the debris tank 408 is provided with a detachable gate plate 412 and a filter plate 413, and the clean water tank 410 is adjacent to the filter plate 413 side of the debris tank 408. The water tank 405 is installed on the top of the water guide plate 404, the water outlet of the water tank 405 is arranged on the front side of the water guide plate 404, the water pump 406 is installed in the clean water tank 410, and the water outlet of the water pump 406 extends to the water tank 405 through a pipeline.

[0077] The use process of the polishing device 4 is as follows:

[0078] The worker polishes the finished casting on the polishing belt assembly 402, and the debris generated during polishing accumulates at the bottom of the polishing cavity 401, that is, the horizontal plate under the deflector 404. The water in the water tank 405 falls along the deflector 404 through the water outlet 414 of the water tank, and the accumulated debris is flushed into the backflow hole 411. The water carrying the debris flows through the backflow hole 411, the backflow channel 407, and enters the waste tank 408. The water in the waste tank 408 is filtered through the filter plate 413 and then enters the clean water tank 410. The water in the clean water tank 410 is lifted by the water pump 406 and then returns to the water tank 405. The water level in the water tank 405 needs to be replenished according to the actual water consumption, and a water replenishment pipe 311 and a water level sensor can be provided for automatic replenishment. When the waste tank 408 accumulates a large amount of waste, the gate plate 412 is pulled up to clean out the waste. When the filter plate 413 does not filter well, it can be removed for cleaning and replacement.

[0079] As a preferred, the guard plate 409 is installed on the outside of the polishing belt assembly 402 to block sparks flying outward during polishing.

[0080] As shown in Figures 22 to 28 The vibration grinding device 5 includes a cleaning feeding conveyor belt 501, a cleaning pool 503, a cleaning gantry mechanical arm 504, a cleaning discharging conveyor belt 502, a cleaning air drying unit 505, a vibration base 506, and an annular grinding groove 507 installed above the vibration base 506. The tangential direction of the annular grinding groove 507 is provided with a discharge port, and the top surface of the grinding groove 507 is provided with an arc-shaped mesh flat plate 508. One end of the mesh flat plate 508 connects the tangential discharge port, and the other end is provided with a separable and inclined mesh climbing plate 509. During discharging, one end of the mesh climbing plate 509 connects the other end of the mesh flat plate 508, and the other end of the mesh climbing plate 509 connects the bottom surface of the grinding groove 507. During grinding, the mesh climbing plate 509 moves out of the grinding groove 507. The mesh diameter of the mesh flat plate 508 and the mesh climbing plate 509 is larger than the particle size of the grinding medium but smaller than the size of the casting. One end of the cleaning feeding conveyor belt 501 connects the tangential discharge port of the grinding groove 507, and the other end connects one end of the cleaning pool 503. The cleaning discharging conveyor belt 502 is provided at the other end of the cleaning pool 503. The cleaning discharging conveyor belt 502 is a mesh belt and is provided with a water receiving tray and a drain pipe below. The cleaning air drying unit 505 is provided above the cleaning discharging conveyor belt 502. The cleaning gantry mechanical arm 504 can be vertically lifted and horizontally moved to convey the casting on the cleaning feeding conveyor belt 501 into the cleaning pool and move the casting in the cleaning pool to the cleaning discharging conveyor belt 502.

[0081] The use process of the vibration grinding device 5 is as follows:

[0082] The finished castings are polished, and if they need to be polished, the workers throw the castings into the grinding tank 507 filled with grinding medium (such as steel balls), at this time the mesh climbing plate 509 is connected to the other end of the mesh flat plate 508;

[0083] The grinding tank 507 is started, and the surface of the casting becomes bright through vibration and the addition of polishing agents;

[0084] After the mesh climbing plate 509 is installed, the grinding tank 507 is started again, and the grinding medium passes through the mesh climbing plate 509 during vibration and falls from the mesh of the mesh climbing plate 509, the casting climbs the mesh climbing plate 509 during vibration and enters the cleaning upper conveying belt 501 along the mesh flat plate 508, then is cleaned in the water tank under the action of the cleaning gantry robot 504 and enters the cleaning lower conveying belt 502, the water remaining on the casting falls through the mesh of the conveying belt and is collected in the water collecting tray and discharged through the drain pipe, and the cleaned casting is dried by the cleaning drying unit 505.

[0085] The connection between the mesh climbing plate 509 and the mesh flat plate 508 can be manually installed or automatically lifted, and in this embodiment, the automatic lifting mode is adopted. The vibration grinding device 5 of this embodiment comprises a climbing plate moving part, the bottom surface of the grinding tank 507 is provided with a guide hole 510, the inner wall of the grinding tank 507 is provided with a guide rail groove 511 between the guide hole 510 and the other end of the mesh flat plate 508, the mesh climbing plate 509 is slidingly connected to the guide rail groove 511 and can slide along the guide rail groove 511, and is driven by the climbing plate moving part. The transmission structure of the mesh climbing plate 509 can be realized by the gear and rack mode. During grinding, the mesh climbing plate 509 is lowered below the bottom surface of the grinding tank 507; during discharging, the mesh climbing plate 509 is raised to connect with the other end of the mesh flat plate 508 by overcoming the resistance of the grinding medium.

[0086] As shown in Figure 25 The bottom surface of the grinding tank 507 is provided with a discharge port 512, the outer wall of the bottom surface of the grinding tank 507 is slidingly connected with a closed discharge plate 513 and a discharge plate moving part, and the discharge plate moving part is used to drive the closed discharge plate 513 to translate. The plate surface of the closed discharge plate 513 is sequentially a filter screen section 5131, a closed section 5132 and an open section 5133 along the sliding direction, the filter screen section 5131 is used to filter out the debris in the grinding tank 507 when corresponding to the discharge port 512, the closed section 5132 is used to block the bottom surface discharge port 512 of the grinding tank 507 when corresponding to the discharge port 512, and the open section 5133 is used to tilt the grinding medium in the grinding tank 507 when corresponding to the discharge port 512. By providing a closed discharge plate 513, three working states of closing during grinding, filtering out debris during cleaning and tilting out grinding medium during non-operation can be realized.

[0087] The above examples are only used to explain the concept of the present application, and are not intended to limit the scope of protection of the present application. Any non-essential changes made to the present application using this concept shall fall within the scope of protection of the present application.

Claims

1. A cooling device for a die casting line, characterized in that, The transfer mechanical arm, the feeding conveyor belt for cooling, N cooling water pools, the discharging conveyor belt for cooling and the truss mechanical arm for cooling are included. The transfer mechanical arm is used to take the castings from the die casting machine and transfer them to the feeding conveyor belt for cooling. The feeding conveyor belt for cooling is used to move the castings to the side of the cooling water pools. The N cooling water pools are arranged in a straight line, and each cooling water pool is provided with a temperature sensor, a drug concentration sensor and a heating device. The discharging conveyor belt for cooling is used to move the castings to the side of the next process. The truss mechanical arm for cooling can be vertically lifted and moved along the arrangement direction of the cooling water pools, and is used to transfer the castings on the feeding conveyor belt for cooling to the cooling water pools, move the castings from the previous cooling water pool to the next cooling water pool, and finally transfer the castings from the cooling water pool to the discharging conveyor belt for cooling.

2. A cooling device for a die casting line as claimed in claim 1, characterized in that The cooling water pool is connected with a circulating pipeline, and the circulating pipeline is provided with a filter, a water supplement pipe and a drug supplement pipe.

3. A cooling device for a die casting line as claimed in claim 1, characterized in that The water in the cooling water pool is filtered to remove impurities through the filter, supplemented with water through the water supplement pipe, and supplemented with drug concentration through the drug supplement pipe.

4. A cooling device for a die casting line as claimed in claim 1, characterized in that The discharging conveyor belt for cooling is a mesh belt, and is provided with a water receiving tray and a drain pipe below. The cooling and air drying unit is located above the discharging conveyor belt for cooling, and is used to air dry the castings on the discharging conveyor belt for cooling.

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