Flange casting equipment and casting process capable of avoiding crack defect

Abstract

The invention discloses flange casting equipment capable of avoiding the crack defect and a casting process, and relates to the technical field of casting. The flange casting equipment comprises a base, a transmission device, a mounting cylinder, a feeding frame, a motor, a distribution box and a casting mechanism. According to the flange casting equipment, the spacer sleeve is arranged on the lower end cover, so that a worker can conveniently adjust the distance between the spacer sleeve and the lower end cover according to the thickness of a to-be-cast flange, and therefore the flange casting equipment can machine flanges of different specifications and thicknesses; the cooling device can synchronously cool the upper side face, the lower side face, the inner wall face and the outer wall face of the flange to prevent the cooling speed of the position, close to a cooling component, of the flange from being higher than the cooling speed of the position, away from the cooling component, of the flange, and the crack defect caused by uneven shrinkage during flange cooling is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of casting, in particular to flange casting equipment and a casting process for avoiding crack defects. Background Art

[0002] Flange is a component that connects pipes, valves, pumps and other equipment. It is usually used to seal and support piping systems. Nowadays, centrifugal casting machines, die casting machines, sand casting equipment and investment casting equipment are widely used to produce flanges.

[0003] The technical solution currently adopted by the equipment for producing flanges by centrifugal casting machines can refer to the patent document "CN107088651A Multi-piece Centrifugal Casting Flange Mold", but in the actual working process, since most cooling components can only cool a certain area of ​​the flange, the flange may sometimes produce crack defects due to uneven cooling shrinkage during the manufacturing process; in addition, the existing centrifugal casting machine usually controls the thickness of the flange by means of the pouring amount of molten metal and the speed of the centrifuge, but this control method is very unstable and the thickness of the flange often deviates. If a retaining structure is set when designing the mold, although the production accuracy of the flange can be improved, the application range of the mold is reduced, which is not conducive to mass production of flanges of different specifications. Summary of the invention

[0004] The purpose of the present invention is to provide a flange casting device and a casting process which can avoid crack defects, so as to solve the problems raised in the prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a flange casting device for avoiding crack defects, the flange casting device comprising a base, a transmission device, a mounting cylinder, a feed rack, a motor, a distribution box and a casting mechanism, the transmission device being arranged inside the base, the mounting cylinder and the motor being arranged relatively at the upper two ends of the base, the distribution box being arranged at one end above the base close to the motor, the mounting cylinder being provided with a first mounting groove and a second mounting groove inside, the feed rack being arranged in the first mounting groove, the casting mechanism being arranged in the second mounting groove, the casting mechanism comprising a roller, a mold, an upper end cover, a turntable, an exhaust assembly and a lower end cover, the roller being arranged on the turntable, one end of the transmission device being connected to the motor, the other end of the transmission device being connected to the turntable through a transmission shaft, the mold being arranged inside the roller, the upper end cover being arranged at the upper end of the mold, the lower end cover being arranged at the lower end of the mold, the exhaust assembly being arranged at the upper middle position of the lower end cover, and when the present invention is working, the motor is driven by the transmission device and the transmission shaft. The rotating turntable rotates at a high speed, thereby driving the roller, the mold, the upper end cover, the exhaust assembly and the lower end cover to rotate. When the smelted molten metal is poured into the mold, under the action of centrifugal force, the molten metal will be evenly distributed on the inner wall of the mold, and gradually form the required flange shape. The present invention is provided with a first cooling groove inside the mold, a retaining sleeve is provided below the upper end cover, a second cooling groove is provided at the lower end of the retaining sleeve, and a third cooling groove is provided at the upper end of the lower end cover. The first cooling groove, the second cooling groove, the third cooling groove and the exhaust assembly are connected. When the staff needs to cool the flange, cold air can be introduced into the third cooling groove. At this time, the cold air will flow along the first cooling groove and the second cooling groove, and finally sprayed out from the exhaust assembly. Compared with the cooling components used in current casting equipment, the present invention can synchronously cool the upper and lower sides of the flange as well as the inner wall and the outer wall to prevent the cooling rate of the flange close to the cooling component from being greater than the cooling rate of the flange away from the cooling component, thereby avoiding crack defects caused by uneven shrinkage during flange cooling.

[0006] Furthermore, an annular air inlet groove is provided at the lower end of the turntable, and the annular air inlet groove is connected with the air inlet end of the third cooling groove through the second air guide groove, and the air outlet end of the third cooling groove is connected with the air inlet end of the first cooling groove. A first air guide groove is also provided in the mold, and the air outlet end of the first air guide groove is connected with the exhaust component. Two groups of arc grooves are provided on the outside of the retaining sleeve, one group of arc grooves is connected with the air outlet end of the first cooling groove and the air inlet end of the second cooling groove, and the other group of arc grooves is connected with the air outlet end of the second cooling groove, The air inlet end of the first air guide groove is connected, and a mounting seat is also provided inside the mounting cylinder. A cooling system is provided inside the mounting seat. The working end of the cooling system is connected to the annular air inlet groove. The first cooling groove, the second cooling groove, and the third cooling groove in the present invention are all spiral structures. During the molding process of the molten metal in the mold, the turntable rotates above the mounting seat. When the flange needs to be cooled, cold air is transported to the annular air inlet groove through the cooling system and finally sprayed out from the exhaust assembly to cool down various areas of the flange.

[0007] Further, the exhaust assembly includes a movable cover, a first fixed cover and a second fixed cover, the movable cover is arranged on the outside of the first fixed cover, the second fixed cover is arranged inside the first fixed cover, a sealing spring rod is arranged inside the second fixed cover, the sealing spring rod is fixedly connected to the exhaust assembly, the upper end of the second fixed cover is provided with a second exhaust hole, the lower end of the second fixed cover is connected to the air outlet end of the first air guide groove, and the lower end of the first fixed cover is provided with a plurality of groups of first exhaust holes. During the molding process of the molten metal in the mold, the movable cover will wrap the first fixed cover to cover the molten metal. Block several groups of first exhaust holes. When the flange is cooled, the cold air discharged from the first air guide groove will first enter the second fixed cover, and increase the air pressure in the second fixed cover to push the sealing spring rod and the movable cover to move upward. When the sealing spring rod moves to above the second exhaust hole, the movable cover will be located at the upper end of the first fixed cover. At this time, several groups of first exhaust holes are no longer blocked, and the cold air will flow along the second exhaust holes and several groups of first exhaust holes. The inner wall area of ​​the flange can be cooled by the cold air flowing out of the several groups of first exhaust holes to avoid cracks in the flange due to uneven cooling and the like.

[0008] Furthermore, a cavity is provided inside the upper end cover, an electromagnet is provided at the upper end of the cavity, a telescopic frame is provided at the lower end of the cavity, the telescopic frame is fixedly connected to the baffle sleeve, the telescopic frame is movably installed in the cavity through a compression spring, and a permanent magnet is embedded in the end of the telescopic frame close to the electromagnet. When the thickness of the flange to be cast needs to be changed, the staff can turn on the electromagnet to drive the telescopic frame and the baffle sleeve to descend, so as to adjust the distance between the baffle sleeve and the lower end cover according to the thickness of the flange to be cast. The baffle sleeve can limit the flow range of the molten metal, thereby controlling the thickness of flanges of different specifications.

[0009] Furthermore, a slide groove is provided at the upper end of the mounting seat, the annular air inlet groove is located inside the slide groove, an induction groove is provided on the inner wall of the slide groove, and a piezoelectric sheet is provided in the induction groove. When the molten metal is formed in the mold, the annular air inlet groove is always located in the slide groove. When the flange needs to be cooled, under normal circumstances, the cold air discharged from the cooling system will completely enter the annular air inlet groove. However, if there is wear between the slide groove and the annular air inlet groove, some cold air will enter the induction groove. At this time, under the action of air pressure, the piezoelectric sheet will generate a set of electrical signals. When the piezoelectric sheet is connected to external equipment such as an oscilloscope, the staff can determine whether the sealing between the slide groove and the annular air inlet groove is damaged by monitoring the changes in the electrical signals on the oscilloscope, so that subsequent staff can promptly repair the mounting seat or turntable.

[0010] Furthermore, a positioning groove is provided at the lower end of the upper end cover, and a positioning block is provided at the upper end of the drum, and the positioning block cooperates with the positioning groove. During operation of the present invention, the positioning block is located in the positioning groove so that the motor drives the turntable to rotate, and the drum, mold, upper end cover, exhaust assembly and lower end cover rotate synchronously to avoid wear on the outer wall of the upper end cover. When the present invention is completed, the staff can directly remove the upper end cover from the installation cylinder to remove the flange later.

[0011] Furthermore, a bushing is provided on the outer side of the transmission shaft, a positioning track is provided on the outer side of the roller, and a plurality of groups of guide wheels are provided on the inner wall of the second mounting groove, and the plurality of groups of guide wheels are all in contact with the positioning track. The present invention can suppress radial runout of the roller and the transmission shaft through the bushing, the plurality of groups of guide wheels and the positioning track, thereby ensuring that the molten metal in the mold is evenly distributed on the inner wall of the mold.

[0012] A flange casting process for avoiding crack defects comprises the following steps: S1: Start the motor to make the casting mechanism rotate at high speed, and pour the molten metal into the mold through the feed rack; S2: After the molten metal forms the desired flange shape, the cooling system is turned on, and cold air is transported to the first cooling tank, the second cooling tank, the third cooling tank and the exhaust assembly through the cooling system to accelerate the cooling of the flange; S3: After the flange is cooled, turn off the motor and cooling system, and then the staff will take out the feed rack, upper end cover, and flange from the installation cylinder in turn.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: compared with the current flange casting equipment, the present invention is provided with an electromagnet and a retaining sleeve. When the thickness of the flange to be cast needs to be changed, the retaining sleeve can be driven to move by the electromagnet, thereby facilitating the staff to adjust the distance between the retaining sleeve and the lower end cover according to the thickness of the flange to be cast, and limiting the flow range of the molten metal by the retaining sleeve, so that the present invention can process flange thicknesses of different specifications. The present invention is also provided with a first cooling trough, a second cooling trough, a third cooling trough and an exhaust assembly. When the staff needs to cool the flange, the cooling system can make the cold air flow along the first cooling trough and the second cooling trough, and finally from the exhaust The gas component is sprayed out. Compared with the cooling components used in current casting equipment, the present invention can synchronously cool the upper and lower sides and the inner and outer wall surfaces of the flange to prevent the cooling rate of the flange close to the cooling component from being greater than the cooling rate of the flange far away from the cooling component, thereby avoiding crack defects caused by uneven shrinkage during flange cooling. Finally, the present invention is also provided with a sensing groove and a piezoelectric sheet. When the piezoelectric sheet is connected to external equipment such as an oscilloscope, the staff can determine whether the sealing between the slide groove and the annular air inlet groove is damaged by monitoring the changes in the electrical signal on the oscilloscope, so that the staff can promptly repair the mounting seat or turntable to avoid affecting the subsequent cooling of the flange. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the installation tube of the present invention; Figure 3 It is a cross-sectional schematic diagram of the installation tube of the present invention; Figure 4 It is a schematic diagram of the casting mechanism structure of the present invention; Figure 5 It is a schematic diagram of the drum structure of the present invention; Figure 6 It is a schematic diagram of the internal structure of the upper end cover and the retaining sleeve of the present invention; Figure 7 It is a schematic diagram of the mounting seat structure of the present invention; Figure 8 It is a schematic diagram of the structure of the exhaust assembly of the present invention when it is not working; Fig. 9 This is a schematic diagram of the structure of the exhaust assembly of the present invention when it is working.

[0015] In the figure: 1, base; 2, transmission device; 21, transmission shaft; 3, mounting cylinder; 31, first mounting groove; 32, second mounting groove; 33, mounting seat; 331, cooling system; 332, induction groove; 34, guide wheel; 35, bushing; 4, feed rack; 5, motor; 6, distribution box; 7, casting mechanism; 71, roller; 711, positioning block; 712, positioning track; 72, mold; 721, first cooling groove; 722, first air guide groove; 73, upper end cover ; 731, electromagnet; 732, telescopic frame; 733, stop sleeve; 734, arc groove; 735, second cooling groove; 736, positioning groove; 74, turntable; 741, annular air inlet groove; 742, second air guide groove; 75, exhaust assembly; 751, movable cover; 752, first fixed cover; 7521, first exhaust hole; 753, second fixed cover; 7531, second exhaust hole; 754, sealing spring rod; 76, lower end cover; 761, third cooling groove. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] Example: Figure 1-Figure 9As shown, the present invention provides a technical solution, a flange casting device that avoids crack defects, the flange casting device includes a base 1, a transmission device 2, a mounting cylinder 3, a feed rack 4, a motor 5, a distribution box 6 and a casting mechanism 7, the transmission device 2 is arranged inside the base 1, the mounting cylinder 3 and the motor 5 are relatively arranged at the upper ends of the base 1, the distribution box 6 is arranged at one end above the base 1 close to the motor 5, the mounting cylinder 3 is provided with a first mounting groove 31 and a second mounting groove 32, the feed rack 4 is arranged in the first mounting groove 31, the casting mechanism 7 is arranged in the second mounting groove 32, and the casting mechanism 7 is arranged in the second mounting groove 32. The mechanism 7 includes a roller 71, a mold 72, an upper end cover 73, a turntable 74, an exhaust assembly 75 and a lower end cover 76. The roller 71 is arranged on the turntable 74. One end of the transmission device 2 is connected to the motor 5. The other end of the transmission device 2 is connected to the turntable 74 through the transmission shaft 21. The mold 72 is arranged inside the roller 71. The upper end cover 73 is arranged at the upper end of the mold 72. The lower end cover 76 is arranged at the lower end of the mold 72. The exhaust assembly 75 is arranged at the middle position above the lower end cover 76. When the present invention is working, the motor 5 drives the turntable 74 at high speed through the transmission device 2 and the transmission shaft 21. The roller 71, the mold 72, the upper end cover 73, the exhaust assembly 75 and the lower end cover 76 rotate, and then the roller 71, the mold 72, the upper end cover 73, the exhaust assembly 75 and the lower end cover 76 rotate. When the smelted molten metal is poured into the mold 72, the molten metal will be evenly distributed on the inner wall of the mold 72 under the action of centrifugal force, and gradually form the required flange shape. The present invention is provided with a first cooling groove 721 inside the mold 72, a stopper sleeve 733 is provided below the upper end cover 73, a second cooling groove 735 is provided at the lower end of the stopper sleeve 733, and a third cooling groove 761 is provided at the upper end of the lower end cover 76. The first cooling groove 721, the second cooling groove 735 , the third cooling groove 761 is connected to the exhaust component 75. When the staff needs to cool the flange, cold air can be introduced into the third cooling groove 761. At this time, the cold air will flow along the first cooling groove 721 and the second cooling groove 735, and finally be ejected from the exhaust component 75. Compared with the cooling components currently used in casting equipment, the present invention can synchronously cool the upper and lower sides and the inner and outer wall surfaces of the flange to prevent the cooling rate of the flange close to the cooling component from being greater than the cooling rate of the flange far away from the cooling component, thereby avoiding crack defects caused by uneven shrinkage during flange cooling.

[0018] like Figure 4 , Figure 6-Figure 9As shown, the lower end of the turntable 74 is provided with an annular air inlet groove 741, and the annular air inlet groove 741 is connected to the air inlet end of the third cooling groove 761 through the second air guide groove 742, and the air outlet end of the third cooling groove 761 is connected to the air inlet end of the first cooling groove 721. The mold 72 is also provided with a first air guide groove 722, and the air outlet end of the first air guide groove 722 is connected to the exhaust component 75. Two groups of arc grooves 734 are provided on the outer side of the stopper sleeve 733, one group of arc grooves 734 is connected to the air outlet end of the first cooling groove 721 and the air inlet end of the second cooling groove 735, and the other group of arc grooves 734 is connected to the outlet end of the second cooling groove 735. The gas end and the air inlet end of the first air guide groove 722 are connected, and a mounting seat 33 is also provided inside the mounting tube 3. A cooling system 331 is provided inside the mounting seat 33. The working end of the cooling system 331 is connected to the annular air inlet groove 741. The first cooling groove 721, the second cooling groove 735, and the third cooling groove 761 in the present invention are all spiral structures. During the molding of the molten metal in the mold 72, the turntable 74 rotates above the mounting seat 33. When the flange needs to be cooled, cold air is transported to the annular air inlet groove 741 through the cooling system 331, and finally sprayed out from the exhaust component 75 to cool down various areas of the flange.

[0019] like Figure 8-Figure 9 As shown, the exhaust assembly 75 includes a movable cover 751, a first fixed cover 752 and a second fixed cover 753. The movable cover 751 is arranged on the outside of the first fixed cover 752, and the second fixed cover 753 is arranged inside the first fixed cover 752. A sealing spring rod 754 is arranged inside the second fixed cover 753, and the sealing spring rod 754 is fixedly connected to the exhaust assembly 75. The upper end of the second fixed cover 753 is provided with a second exhaust hole 7531, and the lower end of the second fixed cover 753 is connected to the air outlet end of the first air guide groove 722. The lower end of the first fixed cover 752 is provided with a plurality of groups of first exhaust holes 7521. During the molding process of the molten metal in the mold 72, the movable cover 751 will wrap the first fixed cover 752 to cover the plurality of groups of first exhaust holes 7521 (such as Figure 8 As shown in FIG. 1 ), when the flange is cooled, the cold air discharged from the first air guide groove 722 will first enter the second fixed cover 753, and the air pressure in the second fixed cover 753 will increase, so as to push the sealing spring rod 754 and the movable cover 751 to move upward. When the sealing spring rod 754 moves to the top of the second exhaust hole 7531, the movable cover 751 will be located at the upper end of the first fixed cover 752 (as shown in FIG. Fig. 9 As shown), at this time, the several groups of first exhaust holes 7521 are no longer blocked, and the cold air will flow along the second exhaust holes 7531 and the several groups of first exhaust holes 7521. The cold air flowing out from the several groups of first exhaust holes 7521 can cool the inner wall area of ​​the flange to avoid cracks in the flange due to uneven cooling and the like.

[0020] like Figure 4 , Figure 6 As shown, a cavity is provided inside the upper end cover 73, an electromagnet 731 is provided at the upper end of the cavity, a telescopic frame 732 is provided at the lower end of the cavity, the telescopic frame 732 is fixedly connected to the retaining sleeve 733, the telescopic frame 732 is movably installed in the cavity through a compression spring, and a permanent magnet is embedded at one end of the telescopic frame 732 close to the electromagnet 731. When the thickness of the flange to be cast needs to be changed, the staff can turn on the electromagnet 731, and drive the telescopic frame 732 and the retaining sleeve 733 to descend through the electromagnet 731, so as to adjust the distance between the retaining sleeve 733 and the lower end cover 76 according to the thickness of the flange to be cast, and the retaining sleeve 733 can limit the flow range of the molten metal, thereby controlling the thickness of flanges of different specifications.

[0021] like Figure 7 As shown, a slide groove is provided at the upper end of the mounting seat 33, and an annular air inlet groove 741 is located inside the slide groove. An induction groove 332 is provided on the inner wall of the slide groove, and a piezoelectric sheet is provided in the induction groove 332. When the molten metal is formed in the mold 72, the annular air inlet groove 741 is always located in the slide groove. When the flange needs to be cooled, under normal circumstances, the cold air discharged from the cooling system 331 will completely enter the annular air inlet groove 741. However, if there is wear between the slide groove and the annular air inlet groove 741, some cold air will enter the induction groove 332. At this time, under the action of air pressure, the piezoelectric sheet will generate a set of electrical signals. When the piezoelectric sheet is connected to an external device such as an oscilloscope, the staff can determine whether the sealing between the slide groove and the annular air inlet groove 741 is damaged by monitoring the changes in the electrical signals on the oscilloscope, so that subsequent staff can promptly repair the mounting seat 33 or the turntable 74.

[0022] like Figure 4-Figure 6 As shown, a positioning groove 736 is provided at the lower end of the upper end cover 73, and a positioning block 711 is provided at the upper end of the roller 71, and the positioning block 711 cooperates with the positioning groove 736. During the operation of the present invention, the positioning block 711 is located in the positioning groove 736, so that the motor 5 drives the turntable 74 to rotate, and the roller 71, the mold 72, the upper end cover 73, the exhaust assembly 75 and the lower end cover 76 rotate synchronously to avoid wear on the outer wall of the upper end cover 73. When the present invention is completed, the staff can directly remove the upper end cover 73 from the installation cylinder 3 so as to remove the flange later.

[0023] like Figure 2 , Figure 3 , Figure 5As shown, a bushing 35 is provided on the outer side of the transmission shaft 21, a positioning track 712 is provided on the outer side of the roller 71, and a plurality of groups of guide wheels 34 are provided on the inner wall of the second mounting groove 32, and the plurality of groups of guide wheels 34 are all in contact with the positioning track 712. The present invention can suppress radial runout of the roller 71 and the transmission shaft 21 through the bushing 35, the plurality of groups of guide wheels 34 and the positioning track 712, thereby ensuring that the molten metal in the mold 72 is evenly distributed on the inner wall of the mold 72.

[0024] like Figure 1-Figure 9 As shown, a flange casting process for avoiding crack defects in this embodiment includes the following steps: S1: Start the motor 5 to make the casting mechanism 7 rotate at high speed, and at the same time pour the molten metal into the mold 72 through the feed rack 4; S2: After the molten metal forms the desired flange shape, the cooling system 331 is turned on to transport cold air to the first cooling tank 721, the second cooling tank 735, the third cooling tank 761 and the exhaust assembly 75 through the cooling system 331 to accelerate the cooling of the flange; S3: After the flange is cooled, the motor 5 and the cooling system 331 are turned off, and then the staff takes out the feed rack 4, the upper end cover 73, and the flange from the installation cylinder 3 in sequence.

[0025] The working principle of the present invention is as follows: before working, the electromagnet 731 is turned on, and the telescopic frame 732 and the stopper sleeve 733 are driven to descend by the electromagnet 731 until the distance between the stopper sleeve 733 and the lower end cover 76 matches the thickness of the flange to be cast. During working, the turntable 74 is driven to rotate at high speed by the motor 5. When the smelted molten metal is poured into the mold 72, the molten metal will be evenly distributed on the inner wall of the mold 72 under the action of centrifugal force, and gradually form the required flange shape. When the staff needs to cool the flange, the cooling system 331 is used to transport cold air into the annular air inlet groove 741, and finally ejected from the exhaust assembly 75. During the flow, the cold air will synchronously cool the upper and lower sides of the flange and the inner and outer wall surfaces to avoid crack defects caused by uneven shrinkage when the flange is cooled. When the cooling of the flange is completed, the motor 5 and the cooling system 331 are turned off, and then the staff takes out the feed rack 4, the upper end cover 73, and the flange from the installation tube 3 in turn.

[0026] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. The embodiments should therefore be considered exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A flange casting device for avoiding crack defects, characterized in that: The flange casting equipment comprises a base (1), a transmission device (2), a mounting cylinder (3), a feed rack (4), a motor (5), a distribution box (6) and a casting mechanism (7), wherein the transmission device (2) is arranged inside the base (1), the mounting cylinder (3) and the motor (5) are arranged at two ends above the base (1) relative to each other, the distribution box (6) is arranged at one end above the base (1) close to the motor (5), a first mounting groove (31) and a second mounting groove (32) are arranged inside the mounting cylinder (3), the feed rack (4) is arranged in the first mounting groove (31), the casting mechanism (7) is arranged in the second mounting groove (32), the casting mechanism (7) comprises a roller (71), a mold (72), an upper end cover (73), a turntable (74), an exhaust assembly (75) and a lower end cover (76), the roller (71) is arranged on the turntable (74), the transmission device (2) is arranged inside the base (1), the mounting cylinder (3) and the motor (5) are arranged at two ends above the base (1), the distribution box (6) is arranged at one end above the base (1) close to the motor (5), a first mounting groove (31) and a second mounting groove (32) are arranged inside the mounting cylinder (3), the feed rack (4) is arranged in the first mounting groove (31), the casting mechanism (7) is arranged in the second mounting groove (32), and the casting mechanism (7) comprises a roller (71), a mold (72), an upper end cover (73), a turntable (74), an exhaust assembly (75) and a lower end cover (76), the roller (71) is arranged on the turntable (74), One end of the transmission device (2) is connected to the motor (5), and the other end of the transmission device (2) is connected to the turntable (74) via a transmission shaft (21). The mold (72) is arranged inside the drum (71), the upper end cover (73) is arranged at the upper end of the mold (72), the lower end cover (76) is arranged at the lower end of the mold (72), and the exhaust assembly (75) is arranged at the middle position above the lower end cover (76). A first cooling groove (721) is arranged inside the mold (72), a retaining sleeve (733) is arranged below the upper end cover (73), a second cooling groove (735) is arranged at the lower end of the retaining sleeve (733), and a third cooling groove (761) is arranged at the upper end of the lower end cover (76). The first cooling groove (721), the second cooling groove (735), the third cooling groove (761) and the exhaust assembly (75) are connected.

2. A flange casting device for avoiding crack defects according to claim 1, characterized in that: The lower end of the turntable (74) is provided with an annular air inlet groove (741), the annular air inlet groove (741) is connected to the air inlet end of the third cooling groove (761) through the second air guide groove (742), the air outlet end of the third cooling groove (761) is connected to the air inlet end of the first cooling groove (721), the mold (72) is further provided with a first air guide groove (722), the air outlet end of the first air guide groove (722) is connected to the exhaust assembly (75), and the outer side of the retaining sleeve (733) is provided with two groups of arc grooves (734), wherein one group of arcuate grooves (734) is connected to the air outlet end of the first cooling groove (721) and the air inlet end of the second cooling groove (735), and another group of arcuate grooves (734) is connected to the air outlet end of the second cooling groove (735) and the air inlet end of the first air guide groove (722), and a mounting seat (33) is also arranged inside the mounting tube (3), and a cooling system (331) is arranged inside the mounting seat (33), and the working end of the cooling system (331) is connected to the annular air inlet groove (741).

3. A flange casting device for avoiding crack defects according to claim 2, characterized in that: The exhaust assembly (75) comprises a movable cover (751), a first fixed cover (752) and a second fixed cover (753); the movable cover (751) is arranged on the outside of the first fixed cover (752); the second fixed cover (753) is arranged inside the first fixed cover (752); a sealing spring rod (754) is arranged inside the second fixed cover (753); the sealing spring rod (754) is fixedly connected to the exhaust assembly (75); a second exhaust hole (7531) is arranged at the upper end of the second fixed cover (753); the lower end of the second fixed cover (753) is connected to the air outlet end of the first air guide groove (722); and a plurality of groups of first exhaust holes (7521) are arranged at the lower end of the first fixed cover (752).

4. The flange casting equipment for avoiding crack defects according to claim 2 is characterized in that: A cavity is provided inside the upper end cover (73), an electromagnet (731) is provided at the upper end of the cavity, a telescopic frame (732) is provided at the lower end of the cavity, the telescopic frame (732) is fixedly connected to the stopper sleeve (733), the telescopic frame (732) is movably installed in the cavity via a compression spring, and a permanent magnet is embedded at one end of the telescopic frame (732) close to the electromagnet (731).

5. The flange casting equipment for avoiding crack defects according to claim 2 is characterized in that: A slide groove is provided at the upper end of the mounting seat (33), the annular air inlet groove (741) is located inside the slide groove, a sensing groove (332) is provided on the inner wall of the slide groove, and a piezoelectric sheet is provided in the sensing groove (332).

6. The flange casting equipment for avoiding crack defects according to claim 1 is characterized in that: The lower end of the upper end cover (73) is provided with a positioning groove (736), and the upper end of the roller (71) is provided with a positioning block (711), and the positioning block (711) matches the positioning groove (736).

7. The flange casting equipment for avoiding crack defects according to claim 1 is characterized in that: A shaft sleeve (35) is arranged on the outside of the transmission shaft (21), a positioning track (712) is arranged on the outside of the roller (71), and a plurality of groups of guide wheels (34) are arranged on the inner wall of the second installation groove (32), and the plurality of groups of guide wheels (34) are in contact with the positioning track (712).

8. A flange casting process for a flange casting device that avoids crack defects according to claim 2, characterized in that: The flange casting process comprises the following steps: S1: starting the motor (5) to rotate the casting mechanism (7) at high speed, and at the same time pouring the molten metal into the mold (72) through the feed rack (4); S2: After the molten metal forms a desired flange shape, the cooling system (331) is turned on, and cold air is transported to the first cooling tank (721), the second cooling tank (735), the third cooling tank (761) and the exhaust assembly (75) through the cooling system (331) to accelerate the cooling of the flange; S3: After the flange is cooled, the motor (5) and the cooling system (331) are turned off, and then the staff sequentially removes the feed rack (4), the upper end cover (73), and the flange from the installation cylinder (3).

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