Casting device and method for robot articulated arm speed reducer casting production

Abstract

The invention discloses a casting device and method for robot articulated arm speed reducer casting production, and relates to the technical field of casting production. The device comprises a casting box and further comprises a micro-vibration platform, and a lifting push rod is arranged between the micro-vibration platform and the casting box through a lifting assembly; a compaction box is arranged at the lower end of the lifting push rod through a compression spring, and a compaction unit is arranged in the compaction box; the compaction unit comprises an extrusion assembly and a micro-pressure assembly; a forming unit is arranged on the micro-vibration compaction table and comprises a forming assembly and a micro-vibration assembly. The molding sand pouring device has the advantages that by adopting the mode that stable sand pouring is matched with pressing and vibration, molding sand can be poured and compacted at the same time, meanwhile, after pouring is completed, by adopting the mode that upper-portion multi-point pressing is matched with lower-portion micro-vibration, rapid molding of a sand mold in a sand box can be achieved, the compaction rate and hardness of molding sand are both higher, and the production efficiency is improved. And lifting demolding of the sand mold can be automatically achieved after casting is completed, the demolding efficiency is higher, and damage is not likely to happen.

Description

Technical Field

[0001] This invention relates to the technical field of casting production, and in particular to a casting apparatus and method for producing a robot articulated arm reducer casting. Background Technology

[0002] Robot articulated arm reducer castings are a key component of the reducer in robot articulated arms. They are mainly made of aluminum alloy or ductile iron by casting equipment. In the current casting process, reducer castings are usually made by first casting sand molds using casting equipment, and then pouring molten metal into the sand molds to complete the preparation.

[0003] Existing casting equipment typically employs various methods to cast castings. For example, a mechanical device for lifting casting molds, disclosed in CN102039378A, includes a metal mold, a tray, guide columns, a bracket, and a slide rail fixed to a base plate. The base plate is connected to a frame around its perimeter. A limiting plate is mounted on the top of the frame. The metal mold is mounted on the tray below the limiting plate by screws. The tray is connected to a flange on a gear sleeve by screws. The gear sleeve is mounted on the guide column. The gear is mounted on the output shaft of the transmission system reducer. The transmission system reducer is mounted on the bracket. A micro motor is connected to the slider through the reducer and a lead screw.

[0004] In existing equipment, when manufacturing sand molds, molding sand is usually poured directly into the sand box for casting, but the molding sand is not vibrated or pressed, resulting in low stability of the sand mold in the sand box. For example, the existing technology mentioned above can only fill the sand box with molding sand from the outside, but cannot achieve vibration and pressing during filling. At the same time, after the sand mold cavity in the sand box is cast, the sand mold cannot be quickly demolded from the molding mold plate, resulting in poor casting effect.

[0005] Therefore, there is an urgent need to design a casting device and method for producing robot articulated arm reducer castings to solve the above problems. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a casting apparatus and method for producing robot articulated arm reducer castings, thus solving the problems mentioned in the background section.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a casting apparatus for producing robot articulated arm reducer castings, comprising a casting box for casting reducer castings, and further comprising: The micro-vibration test platform is set inside the casting box, and a lifting push rod is installed between the micro-vibration test platform and the casting box through a lifting assembly; The lower end of the lifting push rod is equipped with a compaction box via a compression spring, and a compaction unit is installed inside the compaction box; The compaction unit includes an extrusion component and a micro-compression component. The extrusion component is equipped with a sand discharge telescopic pipe for injecting molding sand, and a compaction plate for extruding the molding sand is installed inside the extrusion component. The micro-compression component is installed on the compaction plate and contains multiple compaction discs for secondary extrusion of the molding sand. The micro-vibration stage is equipped with a molding unit, which includes a molding component and a micro-vibration component. The molding component contains a mold box, and the mold box contains a molding mold plate for molding. A sand box is installed on the mold box through a locking mechanism. The micro-vibration component is set in the micro-vibration stage to achieve compaction and micro-vibration of the molding sand.

[0008] Preferably, the casting box is rotatably mounted with an opening and closing door for sealing, and a control box is provided on the side of the casting box. The control box is used to control the opening, closing and operation status of the compaction unit and the molding unit.

[0009] Preferably, the lifting assembly includes multiple limiting guide rods fixedly installed between the micro-vibration test platform and the casting box, a lifting platform is slidably installed on the limiting guide rods, a mold-lifting hydraulic cylinder is fixedly installed inside the casting box, a lifting push rod is fixedly installed on the drive end of the mold-lifting hydraulic cylinder, and the lifting platform is set on the lifting push rod.

[0010] Preferably, the extrusion assembly includes a compaction plate slidably installed in the compaction box, and a sand discharge telescopic pipe is arranged between the compaction plate and the casting box. A sleeve ring is fixedly installed on the lifting push rod, and multiple extrusion push rods for driving the compaction plate to rise and fall are fixedly installed between the sleeve ring and the compaction plate.

[0011] Preferably, the micro-compression assembly includes a lifting motor fixedly mounted on the compaction plate, and a drive roller fixedly mounted on the drive end of the lifting motor. Lifting pressure rods are fixedly mounted inside the compaction box through multiple sets of lifting springs. Multiple compaction discs are fixedly mounted on the lower part of each lifting pressure rod, and each compaction disc is slidably connected to the compaction plate. A lifting arc plate is fixedly mounted on each lifting pressure rod, and multiple lifting cams that cooperate with the corresponding lifting arc plates are fixedly mounted on the drive roller.

[0012] Preferably, the molding component includes multiple support plates fixedly installed inside the mold box, and the molding mold plate is placed on the multiple support plates, and two positioning plates are fixedly installed on the mold box.

[0013] Preferably, the locking mechanism includes multiple positioning guide posts fixedly installed on the mold box, and multiple positioning holes that cooperate with the corresponding positioning guide posts are opened on both the sand box and the compaction box. Two control handles are fixedly installed on the side of the sand box. An adsorption mechanism for demolding is installed between the sand box and the compaction box. Two positioning plates are fixedly installed on the sand box, and two positioning bolts are threaded on each of the two positioning plates. Each positioning bolt cooperates with a corresponding positioning plate.

[0014] Preferably, the adsorption mechanism includes two electromagnetic adsorption plates fixedly installed on the side of the compaction box, and two electromagnetic adsorption components are fixedly installed on the sand box, and each electromagnetic adsorption component has an adsorption groove that cooperates with the corresponding electromagnetic adsorption plate.

[0015] Preferably, the micro-vibration assembly includes a micro-vibration groove formed within the micro-vibration platform, and the mold box is slidably installed within the micro-vibration groove. Multiple micro-vibration springs are fixedly installed between the bottom wall of the micro-vibration groove and the mold box. A micro-vibration motor is fixedly installed within the micro-vibration groove. A drive rod is fixedly installed on the drive end of the micro-vibration motor, and a micro-vibration disk is fixedly installed on the drive rod. Multiple micro-vibration protrusions are fixedly installed on the micro-vibration disk, and a vibration contact rod that cooperates with the multiple micro-vibration protrusions is fixedly installed at the bottom of the mold box.

[0016] A casting method for producing a robot articulated arm reducer casting, using a casting apparatus for producing the aforementioned robot articulated arm reducer casting, includes the following steps: S1. When performing sand casting, first put the sand box onto the mold box through the locking mechanism so that the bottom of the sand box is completely aligned with the plane of the molding mold plate. S2. Start the lifting assembly to move the compaction box down to the top of the sand box, and then start the sand discharge telescopic pipe to pour molding sand into the sand box; S3. While the molding sand is being poured, the micro-vibration components are activated to perform micro-vibration, which improves the fluidity and pre-compactness of the molding sand. S4. After the sand box is filled with molding sand, start the extrusion and compaction components to compact the molding sand in the sand box. S5. While compacting, the micro-vibration component is activated to perform simultaneous compaction and vibration, thereby improving the compaction rate and hardness of the molding sand. S6. After compaction, start the lifting assembly and use the lifting push rod to move the compaction box and sand box upwards together to demold. Then remove the sand box from the compaction box to complete the sand mold preparation.

[0017] This invention provides a casting apparatus and method for producing robot articulated arm reducer castings. It has the following beneficial effects: 1. When preparing sand molds for castings, this casting device can achieve flexible casting operations through the control box. The shape of the molding mold plate can be flexibly adjusted according to the shape of the casting. It is suitable for the requirements of molding flexibility for complex robot articulated arm reducer castings, and can effectively improve the yield of castings.

[0018] 2. When preparing the casting sand mold, this casting device uses a combination of a compaction plate and multiple compaction discs to fully and comprehensively press the molding sand poured into the sand box, allowing the molding sand to fully compress and contact the molding mold plate, effectively improving the compactness and hardness of the sand mold.

[0019] 3. When preparing the casting sand mold, this casting device can simultaneously add molding sand and vibrate the molding sand in the sand box through the micro-vibration component, thereby achieving simultaneous sand addition and vibration compaction. This can effectively improve the fluidity of the molding sand and achieve pre-compactment of the molding sand.

[0020] 4. When preparing the sand mold for casting, this casting device can simultaneously press and vibrate the molding sand in the sand box after the molding sand is poured, through the cooperation of the pressing component and the micro-vibration component, effectively improving the compaction rate and hardness of the molding sand and realizing the rapid preparation of the sand mold.

[0021] 5. When preparing the sand mold for casting, this casting device can simultaneously lift the compaction box and the sand box by means of the cooperation of the mold-lifting hydraulic cylinder and the adsorption component after the sand mold is prepared. This allows the sand box to be quickly separated from the micro-vibration compaction table, thus achieving the simultaneous separation of the sand mold and the molding mold plate in the sand box. This enables automatic demolding of the sand mold and improves demolding efficiency.

[0022] In summary, this invention achieves simultaneous pouring and compaction of molding sand by using a combination of stable sand injection, pressing, and vibration. Furthermore, after pouring, the use of multi-point pressing at the top and micro-vibration at the bottom enables rapid molding of the sand mold within the sand box, resulting in higher compaction rate and hardness of the molding sand. Additionally, the invention automatically lifts and demolds the sand mold after casting, resulting in higher demolding efficiency and less risk of damage.

[0023] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. Attached Figure Description

[0024] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the casting device for producing a robot articulated arm reducer casting according to the present invention; Figure 2 for Figure 1 Schematic diagram of the structure of the casting box; Figure 3 for Figure 2 A schematic diagram of the structure after removing the casting box; Figure 4 for Figure 3 Schematic diagram of the lifting push rod and compaction box; Figure 5 for Figure 4 A schematic diagram of the structure after rotation at a certain angle; Figure 6 for Figure 4 Schematic diagram of the internal structure of the medium-pressure compaction chamber; Figure 7 for Figure 3 Schematic diagram of the structure of the intermediate compression spring and the compaction box; Figure 8 for Figure 6 A schematic diagram of the structure with a centrally fitted ring and a compaction plate; Figure 9 for Figure 8 A schematic diagram of the structure of the lifting motor and the compaction plate; Figure 10 for Figure 3 Schematic diagram of the structure of the micro-vibration test platform, mold box, and sand box; Figure 11 for Figure 10 A structural decomposition diagram; Figure 12 for Figure 10 Schematic diagram of the micro-vibration test platform and mold box; Figure 13 for Figure 12 Schematic diagram of the longitudinal internal structure of the micro-seismic test platform; Figure 14 for Figure 12 Schematic diagram of the transverse internal structure of the micro-seismic test platform; Figure 15 for Figure 14 Front view of the intermediate mold box and the micro-vibration plate.

[0025] In the diagram: 1. Casting box, 2. Control box, 3. Opening and closing door, 4. Micro-vibration compaction platform, 5. Lifting platform, 6. Mold box, 7. Limiting guide rod, 8. Sand discharge telescopic tube, 9. Mold lifting hydraulic cylinder, 10. Lifting push rod, 11. Sand box, 12. Compaction box, 13. Compression spring, 14. Electromagnetic adsorption plate, 15. Sleeve ring, 16. Extrusion push rod, 17. Compaction plate, 18. Compaction disc, 19. Lifting pressure rod, 20. Lifting spring, 21. Lifting motor, 22. Drive roller, 23. Lifting arc plate, 24. Lifting cam, 25. Molding mold plate, 26. Electromagnetic adsorption component, 27. Micro-vibration groove, 28. Control handle, 29. Positioning plate, 30. Positioning guide post, 31. Micro-vibration motor, 32. Micro-vibration disc, 33. Drive rod, 34. Micro-vibration spring, 35. Micro-vibration protrusion, 36. Vibration contact rod. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0027] Example 1: Refer to Figures 1-4 A casting apparatus for producing a robot articulated arm reducer casting includes a casting box 1 for casting the reducer casting, a drive source for driving is provided inside the casting box 1, and a plurality of heat dissipation openings for heat dissipation are provided on its side.

[0028] This casting apparatus also includes: The micro-vibration stage 4 is set inside the casting box 1. The micro-vibration stage 4 plays a supporting role to ensure that the sand mold of the casting can be cast smoothly.

[0029] A lifting push rod 10 is provided between the micro-vibration stage 4 and the casting box 1 through a lifting assembly. The lifting assembly includes multiple limiting guide rods 7 fixedly installed between the micro-vibration stage 4 and the casting box 1. A lifting platform 5 is slidably installed on the limiting guide rods 7. A mold-lifting hydraulic cylinder 9 is fixedly installed inside the casting box 1, and a lifting push rod 10 is fixedly installed on the drive end of the mold-lifting hydraulic cylinder 9. The lifting platform 5 is set on the lifting push rod 10. The lifting platform 5 can slide up and down through the limiting action of multiple limiting guide rods 7, enabling the lifting platform 5 to slide vertically stably without deviation or separation.

[0030] When the mold-removing hydraulic cylinder 9 is started, it will drive the lifting push rod 10 on its drive end to move up and down, which in turn drives the lifting platform 5 on the lifting push rod 10 to move, realizing the compaction and demolding auxiliary operations during casting.

[0031] The lower end of the lifting push rod 10 is equipped with a compaction box 12 via a compression spring 13. When the lifting push rod 10 moves up and down, it will synchronously drive the compaction box 12 to move up and down via the compression spring 13. When the compaction box 12 moves down to the lowest position and cannot move further, the lifting push rod 10 will continue to move down and squeeze the compression spring 13 to compress it. At the same time, the compaction box 12 will not move. That is, when the compaction box 12 moves to the lowest position, the lifting push rod 10 can still move vertically down stably.

[0032] In a further embodiment, a compaction unit is provided inside the compaction box 12. The compaction unit is used to achieve stable pouring of molding sand, and at the same time, it can perform stable compaction work while pouring molding sand, thereby improving the compaction rate and hardness of molding sand, improving the molding efficiency of sand mold, and making the molded sand mold harder and less prone to damage.

[0033] The micro-vibration stage 4 is equipped with a molding unit, which is used to realize the rapid molding and demolding of sand molds. By using vibration compaction, the molding efficiency of sand molds can be accelerated, the compaction rate of sand molds can be improved, and automatic demolding of sand molds can be realized after preparation, resulting in higher demolding efficiency.

[0034] The casting box 1 is rotatably mounted with an opening and closing door 3 for sealing. The opening and closing door 3 is used to seal the casting box 1, improve the sealing performance during sand casting, and prevent the molding sand from overflowing during sand casting.

[0035] A control box 2 is provided on the side of the casting box 1. The control box 2 is used to control the opening and closing and operation status of the compaction unit and the molding unit, so as to realize the automated preparation of sand mold and the casting efficiency of casting.

[0036] Example 2: Refer to Figures 2-7 as well as Figures 10-12 The difference between this embodiment and embodiment one is that the molding unit includes a molding component and a micro-vibration component. The molding component is provided with a mold box 6, and the mold box 6 is provided with a molding mold plate 25 for molding. A sand box 11 is installed on the mold box 6 through a locking mechanism.

[0037] The molding assembly includes multiple support plates fixedly installed inside the mold box 6, and the molding mold plate 25 is placed on the multiple support plates. Two positioning plates 29 are fixedly installed on the mold box 6. The molding mold plate 25 is placed in the mold box 6 by multiple support plates. The support plates can position the molding mold plate 25 and can be quickly installed, placed and removed. During casting, the molding mold plate 25 of appropriate shape is selected and placed in the mold box 6 for fixation, so that sand mold cavities of different shapes can be quickly cast.

[0038] The locking mechanism includes multiple positioning guide posts 30 fixedly installed on the mold box 6, and multiple positioning holes that cooperate with the corresponding positioning guide posts 30 are opened on both the sand box 11 and the compaction box 12. Two control handles 28 are fixedly installed on the side of the sand box 11. The sand box 11 can be moved as a whole by two controls. When casting the casting, the sand box 11 is first lifted by two controls, and then the positioning hole on the sand box 11 is aligned with the positioning guide post 30 at the corresponding position on the mold box 6. Then the sand box 11 is released, so that the sand box 11 automatically slides to the bottom of the positioning guide post 30 under the action of gravity. When the sand box 11 slides down to the bottom of the positioning guide post 30, the lower surface of the sand box 11 completely overlaps with the upper surface of the molding mold plate 25, that is, the sand box 11 completely covers the molding mold on the molding mold plate 25. At this time, molding sand is poured into the sand box 11, and a sand model cavity that is exactly the same as the molding mold is formed in the sand box 11, thereby completing the sand model cavity preparation work.

[0039] Two positioning plates are fixedly installed on the sand box 11, and two positioning bolts are threaded on each of the two positioning plates, and each positioning bolt is engaged with the corresponding positioning plate 29. When the sand box 11 falls to its lowest position, the positioning bolts on its positioning plate can be rotated to rotate and screw into the positioning plate 29 at the corresponding position on the mold box 6, thus completing the re-fixation of the sand box 11. This prevents the sand box 11 from shaking during the preparation of the sand mold and effectively improves the stability of the internal sand mold forming.

[0040] Example 3: Refer to Figures 2-3 as well as Figures 8-15 The difference between this embodiment and embodiment two is that the compaction unit includes an extrusion component and a micro-compression component. The extrusion component is provided with a sand discharge telescopic pipe 8 for injecting molding sand. The extrusion component is provided with a compaction plate 17 for extruding molding sand. The micro-compression component is provided on the compaction plate 17 and is provided with a plurality of compaction discs 18 for secondary extrusion of molding sand.

[0041] Once the sand box 11 is positioned, the mold-lifting hydraulic cylinder 9 can be activated to move the lifting push rod 10 downward. When the lifting push rod 10 moves downward, it will move the compaction box 12 downward as a whole through the compression spring 13. When the compaction box 12 moves downward, the positioning holes on it will engage with multiple positioning guide posts 30. When the compaction box 12 moves downward and is pressed against the upper part of the sand box 11, the compaction box 12 moves to the lowest position, that is, the compaction box 12 can no longer move downward.

[0042] After the compaction box 12 has been lowered, the sand release expansion pipe 8 can be opened to pour the molding sand into the lower part of the compaction plate 17 through the sand release expansion pipe 8, and then drop it into the sand box 11 through the compaction box 12 until the sand box 11 is full, which means the molding sand pouring is complete.

[0043] The extrusion assembly includes a compaction plate 17 that is slidably installed in the compaction box 12, and a sand discharge telescopic pipe 8 is provided between the compaction plate 17 and the casting box 1. A sleeve ring 15 is fixedly installed on the lifting push rod 10, and multiple extrusion push rods 16 for driving the compaction plate 17 to rise and fall are fixedly installed between the sleeve ring 15 and the compaction plate 17. After the compaction box 12 has moved down, when the mold-lifting hydraulic cylinder 9 is started to drive the lifting push rod 10 to move down, the compaction box 12 cannot move down at this time, while the lifting push rod 10 will continue to move down and squeeze the compression spring 13. That is, the relative position of the lifting push rod 10 and the compaction box 12 will change at this time. When the lifting push rod 10 moves down, it will drive multiple pressing push rods 16 to move down through the sleeve ring 15. When the multiple pressing push rods 16 move down, they will drive the compaction plate 17 to move down synchronously. When the compaction plate 17 moves down to be level with the upper part of the sand box 11, the downward movement is completed. At this time, the compaction plate 17 will squeeze and limit the upper part of the sand box 11, completing the initial pressing of the upper part.

[0044] In a further embodiment, the micro-compression assembly includes a lifting motor 21 fixedly mounted on the compaction plate 17, and a drive roller 22 fixedly mounted on the drive end of the lifting motor 21. Lifting pressure rods 19 are fixedly mounted inside the compaction box 12 through multiple sets of lifting springs 20. Multiple compaction plates 18 are fixedly mounted on the lower part of each lifting pressure rod 19, and each compaction plate 18 is slidably connected to the compaction plate 17. A lifting arc plate 23 is fixedly mounted on each lifting pressure rod 19, and multiple lifting cams 24 that cooperate with the corresponding lifting arc plate 23 are fixedly mounted on the drive roller 22. After the molding sand in the sand box 11 is filled, the mold-lifting hydraulic cylinder 9 can be started to drive the lifting push rod 10 to continue to move down, thereby driving the compaction plate 17 to move down to fully press the molding sand in the sand box 11, completing the full pressing of the molding sand and improving the compaction rate and hardness of the molding sand.

[0045] While the pressing plate 17 is pressing down, the lifting motor 21 is started, which drives the drive roller 22 and multiple lifting cams 24 to rotate synchronously. When the lifting cam 24 rotates, it will contact the lifting arc plate 23 on the corresponding lifting pressure rod 19. When the lifting cam 24 rotates from the low point to the high point on the lifting arc plate 23, the lifting arc plate 23 will automatically move down. When the lifting cam 24 rotates from the high point to the low point, the lifting arc plate 23 will automatically move up. Thus, the reciprocating lifting of the lifting pressure rod 19 can be achieved by the continuous rotation of the lifting cam 24 and the elastic reset action of the two lifting springs 20. When the lifting pressure rod 19 moves up and down, it will drive the multiple compaction plates 18 below it to move up and down. When the compaction plates 18 move up and down, they will repeatedly press the molding sand below it. By cooperating with the multiple compaction plates 18, the molding sand can be pressed at multiple points, which can further improve the pressing effect of the molding sand, further improve the density of the molding sand, and make the molding sand easier to form.

[0046] In a further embodiment, a micro-vibration component is disposed within the micro-vibration platform 4 to achieve compact micro-vibration of the molding sand. The micro-vibration component includes a micro-vibration groove 27 formed within the micro-vibration platform 4, and the mold box 6 is slidably installed within the micro-vibration groove 27, so that the mold box 6 can slide stably up and down within the micro-vibration groove 27.

[0047] Multiple micro-vibration springs 34 are fixedly installed between the bottom wall of the micro-vibration groove 27 and the mold box 6. A micro-vibration motor 31 is fixedly installed inside the micro-vibration groove 27. A drive rod 33 is fixedly installed on the drive end of the micro-vibration motor 31, and a micro-vibration disk 32 is fixedly installed on the drive rod 33. Multiple micro-vibration protrusions 35 are fixedly installed on the micro-vibration disk 32, and a vibration contact rod 36 that cooperates with the multiple micro-vibration protrusions 35 is fixedly installed at the bottom of the mold box 6. When the micro-vibration motor 31 is started, it will drive the drive rod 33 and the micro-vibration disk 32 to rotate. When the micro-vibration disk 32 rotates, it will drive the multiple micro-vibration protrusions 35 on it to rotate. When the micro-vibration protrusions 35 rotate, they will alternately press and contact with the vibration contact rod 36 at the bottom of the mold box 6. That is, when the micro-vibration protrusions 35 and the vibration contact rod 36 press and contact each other, they will lift and lower the vibration contact rod 36. Thus, the reciprocating lifting and lowering of the vibration contact rod 36 can be achieved through the cooperation of multiple micro-vibration protrusions 35 and the micro-vibration disk 32.

[0048] When the vibration contact rod 36 reciprocates, it will synchronously drive the mold box 6 to reciprocate. Then, through the elastic reset action of multiple micro-vibration springs 34, the mold box 6 will reciprocate. When the mold box 6 reciprocates, it will synchronously drive the sand box 11 to reciprocate. This will achieve reciprocating micro-vibration of the molding sand in the sand box 11, thereby improving the density of the molding sand in the sand box 11 through micro-vibration.

[0049] While the molding sand is being poured, the micro-vibration component is activated to drive the sand box 11 to vibrate simultaneously, which can improve the fluidity and pre-compactment of the molding sand. After the molding sand is poured, the extrusion component and the compaction component are activated to compact the molding sand in the sand box 11. At the same time, the micro-vibration component is activated to press and vibrate simultaneously, which can effectively improve the compaction rate and hardness of the molding sand.

[0050] An adsorption mechanism for demolding is installed between the sand box 11 and the compaction box 12. The adsorption mechanism includes two electromagnetic adsorption plates 14 fixedly installed on the side of the compaction box 12. Two electromagnetic adsorption components 26 are fixedly installed on the sand box 11, and each electromagnetic adsorption component 26 has an adsorption groove that cooperates with the corresponding electromagnetic adsorption plate 14. When the compaction box 12 moves down to fit against the sand box 11, the electromagnetic adsorption plate 14 on the compaction box 12 will be locked and adsorbed onto the electromagnetic adsorption component 26 on the sand box 11, that is, at this time the compaction box 12 and the sand box 11 form a whole.

[0051] After the molding sand in the sand box 11 has been compacted and formed, the sand box 11 is unlocked, and then the mold-lifting hydraulic cylinder 9 is activated to move the compaction box 12 upward. The upward movement of the compaction box 12 will cause the sand box 11 to move upward synchronously through the adsorption effect of the adsorption mechanism, thereby causing the sand box 11 to separate from the molding mold plate 25, thus completing the automatic demolding of the sand mold in the sand box 11. After the sand box 11 has moved upward, the adsorption effect of the adsorption mechanism can be released, and the sand box 11 can be taken out from the compaction box 12, realizing the removal of the sand mold. At this time, the casting work of the casting in the sand mold can be carried out.

[0052] The specific working principle of this casting device is as follows: When casting the part, first lift the sand box 11 by two control levers 28, then align the positioning hole on the sand box 11 with the corresponding positioning guide post 30 on the mold box 6, and then release the sand box 11 so that the sand box 11 automatically slides down to the bottom of the positioning guide post 30 under the action of gravity. Once the sand box 11 is positioned, the mold-lifting hydraulic cylinder 9 can be activated to move the lifting push rod 10 downward. When the lifting push rod 10 moves downward, it will move the compaction box 12 downward as a whole through the compression spring 13. When the compaction box 12 moves downward, the positioning holes on it will engage with multiple positioning guide posts 30. When the compaction box 12 moves downward and is pressed against the upper part of the sand box 11, the compaction box 12 moves to the lowest position, that is, the compaction box 12 can no longer move downward.

[0053] After the compaction box 12 has been lowered, the sand release expansion pipe 8 can be opened to pour the molding sand into the lower part of the compaction plate 17 through the sand release expansion pipe 8, and then drop it into the sand box 11 through the compaction box 12 until the sand box 11 is full, which means the molding sand pouring is complete.

[0054] After the compaction box 12 has moved down, the mold-lifting hydraulic cylinder 9 is activated to drive the lifting push rod 10 to move down. The lifting push rod 10 moves down and drives multiple extrusion push rods 16 to move down through the sleeve ring 15. When the multiple extrusion push rods 16 move down, they will drive the compaction plate 17 to move down synchronously. When the compaction plate 17 moves down to be level with the upper part of the sand box 11, the downward movement is complete. At this time, the compaction plate 17 will squeeze and limit the upper part of the sand box 11, completing the initial pressing of the upper part.

[0055] After the molding sand in the sand box 11 is filled, the mold-lifting hydraulic cylinder 9 can be started to drive the lifting push rod 10 to continue to move down, which in turn drives the compaction plate 17 to move down to fully press the molding sand in the sand box 11, completing the full pressing of the molding sand. At the same time, the micro-pressure component drives multiple compaction plates 18 to move back and forth, pressing the molding sand in the sand box 11 back and forth, improving the compaction rate and hardness of the molding sand.

[0056] While the molding sand is being poured, the micro-vibration component is activated to drive the sand box 11 to vibrate simultaneously, thereby improving the fluidity and pre-compactment of the molding sand. After the molding sand is poured, the extrusion component and the compaction component are activated to compact the molding sand in the sand box 11. At the same time, the micro-vibration component is activated to press and vibrate simultaneously, effectively improving the compaction rate and hardness of the molding sand.

[0057] After the molding sand in the sand box 11 has been compacted and formed, the sand box 11 is unlocked and the mold release hydraulic cylinder 9 is started to move the compaction box 12 upward. The upward movement of the compaction box 12 will drive the sand box 11 to move upward synchronously through the adsorption of the adsorption mechanism, thereby causing the sand box 11 to separate from the molding mold plate 25, and completing the automatic demolding of the sand mold in the sand box 11. After the sand box 11 has moved up, the adsorption effect of the adsorption mechanism is released, and the sand box 11 is removed from the compaction box 12, thus realizing the removal of the sand mold. At this time, the casting of the casting inside the sand mold can be carried out.

[0058] This invention also provides a casting method for producing robot articulated arm reducer castings, using a casting apparatus for producing the aforementioned robot articulated arm reducer castings, comprising the following steps: S1. When performing sand casting, the sand box 11 is first fitted onto the mold box 6 through a locking mechanism, so that the bottom of the sand box 11 is completely aligned with the plane of the molding mold plate 25. S2. Start the lifting assembly to move the compaction box 12 down to the top of the sand box 11, and then start the sand discharge telescopic pipe 8 to pour molding sand into the sand box 11. S3. While the molding sand is being poured, the micro-vibration components are activated to perform micro-vibration, which improves the fluidity and pre-compactness of the molding sand. S4. After the sand box 11 is filled with molding sand, start the extrusion component and the compaction component to compact the molding sand in the sand box 11. S5. While compacting, the micro-vibration component is activated to perform simultaneous compaction and vibration, thereby improving the compaction rate and hardness of the molding sand. S6. After compaction, start the lifting assembly and use the lifting push rod 10 to move the compaction box 12 and sand box 11 upward together to demold. Then, remove the sand box 11 from the compaction box 12 to complete the sand mold preparation.

[0059] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A casting apparatus for producing robot articulated arm reducer castings, comprising a casting box (1) for casting reducer castings, characterized in that, Also includes: The micro-vibration test platform (4) is set inside the casting box (1), and a lifting push rod (10) is set between the micro-vibration test platform (4) and the casting box (1) through a lifting assembly. The lower end of the lifting push rod (10) is provided with a compaction box (12) via a compression spring (13), and a compaction unit is provided inside the compaction box (12); The compaction unit includes an extrusion component and a micro-compression component. The extrusion component is equipped with a sand discharge telescopic pipe (8) for injecting molding sand. The extrusion component is equipped with a compaction plate (17) for extruding molding sand. The micro-compression component is set on the compaction plate (17) and is equipped with multiple compaction discs (18) for secondary extrusion of molding sand. A molding unit is provided on the micro-vibration stage (4). The molding unit includes a molding component and a micro-vibration component. A mold box (6) is provided inside the molding component, and a molding mold plate (25) for molding is provided inside the mold box (6). A sand box (11) is installed on the mold box (6) through a locking mechanism. The micro-vibration component is set inside the micro-vibration stage (4) to achieve compact micro-vibration of the molding sand.

2. The casting apparatus for producing robot articulated arm reducer castings according to claim 1, characterized in that, The casting box (1) is rotatably mounted with an opening and closing door (3) for sealing. A control box (2) is provided on the side of the casting box (1). The control box (2) is used to control the opening, closing and operation status of the compaction unit and the molding unit.

3. The casting device for producing robot articulated arm reducer castings according to claim 1, characterized in that, The lifting assembly includes multiple limiting guide rods (7) fixedly installed between the micro-vibration platform (4) and the casting box (1). A lifting platform (5) is slidably installed on the limiting guide rods (7). A mold-lifting hydraulic cylinder (9) is fixedly installed inside the casting box (1). A lifting push rod (10) is fixedly installed on the drive end of the mold-lifting hydraulic cylinder (9). The lifting platform (5) is set on the lifting push rod (10).

4. The casting apparatus for producing robot articulated arm reducer castings according to claim 3, characterized in that, The extrusion assembly includes a compaction plate (17) that is slidably installed in the compaction box (12), and a sand discharge telescopic pipe (8) is arranged between the compaction plate (17) and the casting box (1). A sleeve ring (15) is fixedly installed on the lifting push rod (10), and a plurality of extrusion push rods (16) for driving the compaction plate (17) to rise and fall are fixedly installed between the sleeve ring (15) and the compaction plate (17).

5. A casting apparatus for producing robot articulated arm reducer castings according to claim 4, characterized in that, The micro-compression assembly includes a lifting motor (21) fixedly installed on the compaction plate (17), and a drive roller (22) fixedly installed on the drive end of the lifting motor (21). The compaction box (12) is fixedly installed with lifting pressure rods (19) through multiple sets of lifting springs (20). Each lifting pressure rod (19) has multiple compaction discs (18) fixedly installed at its lower part. Each compaction disc (18) is slidably connected to the compaction plate (17). Each lifting pressure rod (19) has a lifting arc plate (23) fixedly installed on it. The drive roller (22) has multiple lifting cams (24) that cooperate with the corresponding lifting arc plate (23).

6. A casting apparatus for producing a robot articulated arm reducer casting according to claim 5, characterized in that, The molding assembly includes multiple support plates fixedly installed in the mold box (6), and the molding mold plate (25) is placed on the multiple support plates. Two positioning plates (29) are fixedly installed on the mold box (6).

7. A casting apparatus for producing robot articulated arm reducer castings according to claim 6, characterized in that, The locking mechanism includes multiple positioning guide posts (30) fixedly installed on the mold box (6), and multiple positioning holes that cooperate with the corresponding positioning guide posts (30) are opened on both the sand box (11) and the compaction box (12). Two control handles (28) are fixedly installed on the side of the sand box (11). An adsorption mechanism for demolding is installed between the sand box (11) and the compaction box (12). Two positioning plates are fixedly installed on the sand box (11), and two positioning bolts are threaded on both positioning plates. Each positioning bolt cooperates with the corresponding positioning plate (29).

8. A casting apparatus for producing a robot articulated arm reducer casting according to claim 7, characterized in that, The adsorption mechanism includes two electromagnetic adsorption plates (14) fixedly installed on the side of the compaction box (12), and two electromagnetic adsorption components (26) fixedly installed on the sand box (11), and each electromagnetic adsorption component (26) has an adsorption groove that cooperates with the corresponding electromagnetic adsorption plate (14).

9. A casting apparatus for producing a robot articulated arm reducer casting according to claim 8, characterized in that, The micro-vibration assembly includes a micro-vibration groove (27) opened in the micro-vibration platform (4), and a mold box (6) is slidably installed in the micro-vibration groove (27). Multiple micro-vibration springs (34) are fixedly installed between the bottom wall of the micro-vibration groove (27) and the mold box (6). A micro-vibration motor (31) is fixedly installed in the micro-vibration groove (27). A drive rod (33) is fixedly installed on the drive end of the micro-vibration motor (31), and a micro-vibration disk (32) is fixedly installed on the drive rod (33). Multiple micro-vibration protrusions (35) are fixedly installed on the micro-vibration disk (32), and a vibration contact rod (36) that cooperates with the multiple micro-vibration protrusions (35) is fixedly installed at the bottom of the mold box (6).

10. A casting method for producing robot articulated arm reducer castings, using the casting apparatus for producing robot articulated arm reducer castings as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. When sand casting is performed, the sand box (11) is first fitted onto the mold box (6) through the locking mechanism so that the bottom of the sand box (11) is completely aligned with the plane of the molding mold plate (25). S2. Start the lifting assembly to move the compaction box (12) down to the top of the sand box (11), and then start the sand discharge telescopic pipe (8) to pour molding sand into the sand box (11); S3. While the molding sand is being poured, the micro-vibration components are activated to perform micro-vibration, which improves the fluidity and pre-compactness of the molding sand. S4. After the sand box (11) is filled with molding sand, start the extrusion component and the compaction component to compact the molding sand in the sand box (11); S5. While compacting, the micro-vibration component is activated to perform simultaneous compaction and vibration, thereby improving the compaction rate and hardness of the molding sand. S6. After compaction, start the lifting assembly and drive the compaction box (12) and sand box (11) to move upward together to demold via the lifting push rod (10). Then remove the sand box (11) from the compaction box (12) to complete the sand mold preparation.

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