Motor base casting forming device and method thereof

Abstract

The invention discloses a motor base casting forming device and method, belongs to the technical field of motor manufacturing, and is suitable for production of motor bases for new energy automobiles. The device comprises an evanescent mode casting forming unit and a casting post-processing unit, the post-processing unit integrates a sand recycling conveying belt, a bearing buffering mechanism, a pre-cooling system, a driving assembly, a guiding-out piece and a transferring sand removing mechanism, the core is bearing pieces which are arranged in a staggered mode and provided with elastic buffering and built-in water ways, and the working states are switched in cooperation with air cylinder driving. The method is automatically achieved through the whole process of casting forming preparation, buffering receiving, sand-iron separation, precooling discharging, guiding-out and transferring and online sand removal. Through double protection of elastic buffering and water-cooling pre-cooling, impact damage and uneven cooling of castings are avoided, sand and iron are separated synchronously, the recovery rate is high, the automation degree is high, the forming precision and production efficiency of the motor base are effectively improved, and the requirements for batch production and high precision of automobile manufacturing are met.

Description

Technical Field

[0001] This invention relates to the field of motor manufacturing technology, and in particular to a motor frame casting and forming apparatus and method. Background Technology

[0002] As the automotive manufacturing industry rapidly transforms towards new energy vehicles, the performance requirements for the core component—the motor—are increasing. The motor housing, as a critical load-bearing and protective component, directly impacts the assembly accuracy, operational stability, and overall vehicle range of the automotive motor due to its molding precision, structural strength, and production efficiency. In the motor manufacturing field, lost foam casting has become one of the mainstream casting processes for automotive motor housings because it can adapt to the complex cavity structures of motor housings, such as cooling channels and heat sinks.

[0003] However, existing motor housing casting technology has many problems that need to be solved in the post-processing stage of automotive motor housings: Automotive motor housings are mostly thin-walled and complex structures with densely integrated heat sinks. The existing sand box tilting unloading method causes the castings to fall directly, and the impact force can easily cause the heat sinks to break and the housing to deform, resulting in a high scrap rate and seriously affecting the assembly qualification rate of automotive motors. In addition, the sand-iron separation efficiency is low. After lost foam casting, the molding sand is mixed with the castings during unloading, and the molding sand residue can easily adhere to critical parts such as the cavity and bolt holes of the motor housing, making subsequent cleaning processes cumbersome. The degree of automation is low, requiring manual intervention, which is not only labor-intensive but also results in inconsistent production rhythms, making it difficult to adapt to the needs of automated production lines in automotive manufacturing. Therefore, it is necessary to develop an automated motor base casting and forming device and method to solve the pain points in the post-processing of automotive motor bases and meet the stringent requirements of the automotive manufacturing industry for core motor components. Summary of the Invention

[0004] To address the technical problems existing in the background art, the present invention proposes a motor base casting and forming device.

[0005] The present invention provides a casting and forming device for an electric motor base, comprising: The lost foam casting molding unit includes a suspended bottom discharge sand box, which is used to hold the lost foam sand mold of the motor base. The bottom of the sand box is provided with a discharge structure for releasing the motor base casting and molding sand after casting. A casting post-processing unit is disposed below the sand box, and the post-processing unit includes: A sand recycling conveyor belt is arranged horizontally, with baffles on both sides, and supports are fixed to the outside of the baffles. A buffer mechanism is provided between the sand box and the sand recycling conveyor belt, including a fixed crossbeam and a movable crossbeam arranged in parallel, with the fixed crossbeam fixed between the two side supports. Multiple sets of strip-shaped support members are installed one-to-one on the opposite side walls of the fixed crossbeam and the movable crossbeam. The support members all extend in an oblique upward direction, and the support members on the fixed crossbeam and the support members on the movable crossbeam are inclined in opposite directions. All support members are arranged in a straight line array along the length of the corresponding crossbeam, and the two sets of support members are interspersed in space to form a support angle for supporting the high-temperature motor base casting after casting. The drive assembly includes a mounting base and a cylinder. The mounting base is fixed to one end of the sand recycling conveyor belt. The cylinder is mounted obliquely upward on the mounting base. The output end of the cylinder is fixedly connected to the movable crossbeam. The extension and retraction of the cylinder can drive the movable crossbeam to move, so that the two sets of bearing components can form an interlaced bearing state or a single-sided bearing unloading state. The sand removal mechanism includes a rotating roller conveyor belt mounted above the baffle of the sand recovery conveyor belt. The rotating roller conveyor belt is composed of multiple independently rotating rollers with gaps between them. A sand removal device is provided above the rotating roller conveyor belt, and the sand removal device includes multiple sets of downward air jet nozzles.

[0006] Preferably, vertical grooves are provided at the connection positions of the fixed crossbeam and the movable crossbeam with the corresponding bearing components, and limiting holes are provided at the bottom of the grooves; a slider is fixedly connected to the end of the bearing component, the slider slides in cooperation with the vertical groove, a vertically extending limiting rod is fixedly connected to the bottom of the slider, the limiting rod is inserted into the limiting hole, and a spring is sleeved on the outside of the limiting rod, with both ends of the spring abutting against the bottom of the slider and the bottom of the groove, respectively, forming an elastic buffer structure.

[0007] By absorbing the impact force of the casting falling through the elastic extension and contraction of the spring, the thin-walled structure and heat sink of the motor base in automobiles are prevented from breaking or deforming due to impact, which greatly reduces the scrap rate of castings and meets the high precision requirements of motor manufacturing.

[0008] Preferably, the bearing member has an internal water channel along its length, and both the fixed crossbeam and the movable crossbeam have parallel water inlet and outlet pipes arranged laterally. The water inlet and outlet pipes are provided with branch interfaces corresponding to the position of each bearing member, and the branch interfaces are connected to both ends of the internal water channel of the corresponding bearing member through flexible hoses to form a casting precooling system.

[0009] Preferably, the fixed crossbeam has multiple sets of downwardly extending guide members on the side away from the movable crossbeam. These guide members are arranged in a straight array, and their inclination direction matches the inclination direction of the support member on the fixed crossbeam. This guide member is used to guide the motor base casting onto the rotary conveyor belt. This achieves synchronous heat exchange between the casting and the support member, quickly removing heat from the casting and preventing internal stress and dimensional springback caused by uneven cooling in automotive motor bases, thus ensuring the flatness accuracy of the assembly surface.

[0010] Preferably, the fixed crossbeam has multiple sets of downwardly extending guide members on the side away from the movable crossbeam. The guide members are arranged in a straight array, and their tilting direction matches the tilting direction of the bearing member on the fixed crossbeam, for guiding the motor base casting to move towards the rotary conveyor belt.

[0011] It provides a stable guiding and transfer channel for castings, preventing them from falling directly from the carrier to the roller conveyor belt, preventing scratches on the surface of the automotive motor base and structural damage, connecting the receiving and transfer processes, and improving the continuity of automated production.

[0012] Preferably, each set of the carrier and guide components has multiple sets of rollers on its upper surface. This converts the sliding friction between the casting and the carrier / guide components into rolling friction, significantly reducing the transfer resistance, preventing scratches on the casting surface due to friction, reducing wear on the carrier components, extending the equipment's service life, and meeting the high precision requirements for surface roughness of automotive motor housings.

[0013] Preferably, the inclination angle between the bearing components on the fixed beam and the horizontal direction is 15°~35°, which precisely balances the sliding speed of the casting and the buffering effect. This avoids the casting sliding too fast and causing overload due to excessive angle, and also prevents the molding sand from accumulating and failing to separate smoothly due to insufficient angle, thus ensuring the efficiency of synchronous separation of sand and iron and meeting the cycle time requirements of mass production in automobile manufacturing.

[0014] Preferably, the device is implemented based on any one of claims 1-7, characterized by comprising the following steps: S1: Casting preparation. Place the lost foam sand mold of the motor base into the suspended bottom unloading sand box to complete the lost foam casting process. After the motor base casting is completely solidified, start the debugging of the casting post-processing unit; extend the control cylinder to drive the movable crossbeam to move, so that the fixed crossbeam and the load-bearing parts on the movable crossbeam form an interlaced bearing state; connect the built-in water circuit of the load-bearing parts to the water inlet and outlet pipes of the crossbeam through flexible hoses, start the pre-cooling system, and circulate the cold water in the water circuit; S2: Open the unloading structure at the bottom of the sand box. The cast motor base casting falls from the bottom of the sand box to the bearing angle formed by the staggered bearing components. During the process of the casting sliding along the inclined bearing surface, the bearing component moves downward along the vertical slide groove through the slider, and the compressed spring achieves elastic buffering to avoid impact damage to the casting. S3: During the falling and sliding process of the casting, the attached molding sand leaks out from the interlacing gaps between the bearing components and falls into the sand recycling conveyor belt below, where it is transported to the molding sand recycling station for recycling. S4: The precooling system continues to work. Cold water carries away the heat conducted from the casting to the bearing surface through the built-in water channel of the bearing component, precooling the casting to 400℃~500℃. The control cylinder contracts, driving the movable crossbeam to move the corresponding bearing component away, leaving only the bearing component on the fixed crossbeam to form a feeding ramp, and the casting slides smoothly down the ramp. S5: The downward-sloping casting is guided by the guide piece on the side of the fixed crossbeam and falls smoothly into the roller conveyor belt; the rollers rotate independently to drive the casting to the sand removal station. During the transfer, the molding sand remaining on the surface of the casting leaks out from the gap between the rollers and falls into the sand recovery conveyor belt. S6: When the casting is transferred to the sand removal station, the sand removal device above the roller conveyor belt is activated. The nozzle blows air downwards to remove the residual sand particles attached to the surface of the casting. The blown-off sand particles fall from the gap between the rollers into the sand recovery conveyor belt. The casting that has completed sand removal is transported by the roller conveyor belt to the subsequent heat treatment or machining station, and finally formed into a qualified motor base.

[0015] It achieves fully automated integration of the entire process of "casting and forming - buffering and receiving - sand and iron separation - pre-cooling - transfer - sand removal", eliminating the need for manual intervention and greatly improving production efficiency.

[0016] Preferably, in step S1, the inlet temperature of the precooling system is controlled at 15℃~30℃, and the water flow velocity is 0.8m / s~1.5m / s. Precise control of the precooling rate ensures that the temperature of the bearing surface does not exceed 120℃, preventing high-temperature damage to the bearing components and casting surfaces, while also preventing excessively rapid cooling that could cause cracks in the casting, thus adapting to the material characteristics and molding requirements of automotive motor housings.

[0017] Preferably, in step S6, the jet pressure of the sand removal device is controlled at 0.4MPa~0.8MPa, and the distance between the nozzle and the casting surface is 150mm~300mm. This efficiently removes residual sand particles from the casting surface while avoiding damage to the casting surface due to excessive jet pressure or too close distance, ensuring the cleanliness and surface accuracy of the mounting surface of the automotive motor base, reducing subsequent grinding processes, and lowering manufacturing costs.

[0018] The motor base casting and forming device proposed in this invention has the following beneficial effects: Through staggered bearing and elastic buffering, the motor slides to the corner for positioning and water pre-cooling, effectively avoiding impact damage and uneven cooling of the motor base in automobiles; improving automobile manufacturing production efficiency: integrating unloading → receiving → buffering → pre-cooling → sand and iron separation → sand removal → transfer into one integrated process, without the need for manual intervention, improving production efficiency and adapting to the mass production needs of automobile manufacturing. Reduce automotive motor manufacturing costs: Increase molding sand recovery rate, reduce casting scrap rate, reduce subsequent grinding and cleaning processes, reduce material waste and labor costs, and meet the cost control needs of the automotive manufacturing industry; Enhanced equipment adaptability: Designed with thin walls and complex structure for automotive motor housings, the tilt angle of the load-bearing components, elastic buffer parameters, water cooling flow rate, etc. are precisely matched to the molding requirements of automotive motor housings, and can be compatible with the production of motor housings for new energy vehicles of different specifications.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the retractable movable crossbeam in this invention; Figure 3 This is a schematic diagram of the buffer mechanism in the carrier component of the present invention; Figure 4 This is a schematic diagram of the water-cooling mechanism in the carrier component of the present invention; Figure 5 This is a schematic diagram of the structure of the fixed crossbeam, the movable crossbeam, and the load-bearing component in this invention; The following are the labels in the diagram: 1. Hanging bottom unloading sand box; 2. Sand recovery conveyor belt; 201. Baffle; 202. Support; 3. Bearing component; 301. Fixed crossbeam; 302. Movable crossbeam; 303. Vertical chute; 304. Sliding block; 305. Limiting rod; 306. Limiting hole; 307. Spring; 308. Roller; 309. Internal water channel; 310. Water inlet pipe; 311. Water outlet pipe; 312. Flexible hose; 313. Outlet component; 4. Cylinder; 401. Mounting base; 5. Rotary roller conveyor belt; 6. Sand removal device. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0022] like Figures 1-3 The above describes a casting and molding device for a motor base. The device is adapted to the lost foam casting process and includes a lost foam casting unit and a casting post-processing unit, with the following specific structure: Lost foam casting molding unit: includes a suspended bottom unloading sand box 1, which is used to hold the lost foam sand mold of the motor base for automobiles. The bottom of the sand box is equipped with an unloading structure, such as a pull-out unloading door, for releasing the high-temperature motor base casting and molding sand after casting, avoiding the impact risk of traditional tilting unloading. The casting post-processing unit, located below the sand box, is used for buffering and receiving the castings, separating sand and iron, pre-cooling, transferring, and removing sand. Specifically, it includes: Sand recycling conveyor belt 2: It is horizontally arranged directly below the sand box. Leak-proof baffles 201 are provided on both sides of the conveyor belt. Supports 202 are fixed to the outside of the baffles 201. It is used to centrally recycle molding sand and transport it to the sand mold preparation station for casting automotive motor base for recycling. The receiving and buffering mechanism is set between the sand box and the sand recycling conveyor belt 2. It includes a fixed crossbeam 301 and a movable crossbeam 302 arranged in parallel. The fixed crossbeam 301 is fixed between the two side supports 202. Multiple sets of strip-shaped bearing members 3 are respectively installed on the opposite side walls of the fixed crossbeam 301 and the movable crossbeam 302. The bearing members 3 all extend in an oblique upward direction. The bearing members 3 on the fixed crossbeam 301 and the bearing members 3 on the movable crossbeam 302 are inclined in opposite directions. All the bearing members 3 are arranged in a straight line along the length of the corresponding crossbeam. The two sets of bearing members 3 are interspersed in space to form a bearing angle for receiving the high-temperature automotive motor base casting after casting. Elastic buffer structure: Vertical grooves 303 are provided at the connection positions of the fixed crossbeam 301 and the movable crossbeam 302 with the corresponding bearing member 3. The bottom of the groove is provided with a limiting hole 306. A slider 304 is fixedly connected to the end of the bearing member 3. The slider 304 slides in cooperation with the vertical groove 303. A vertically extending limiting rod 305 is fixedly connected to the bottom of the slider 304. The limiting rod 305 is inserted into the limiting hole 306. A spring 307 is sleeved on the outside of the limiting rod 305. The two ends of the spring 307 abut against the bottom of the slider 304 and the bottom of the groove, respectively, to absorb the impact force of the casting falling and protect the thin-walled structure and heat sink of the automotive motor base. Casting pre-cooling system: The bearing 3 has an internal water channel 309 along its length, which is located close to the upper surface of the bearing 3; the fixed crossbeam 301 and the movable crossbeam 302 are both provided with parallel water inlet pipes 310 and water outlet pipes 311 arranged laterally. The water inlet pipes 310 and water outlet pipes 311 are provided with branch interfaces corresponding to the position of each bearing 3. The branch interfaces are connected to the two ends of the internal water channel 309 of the corresponding bearing 3 through high temperature resistant flexible hoses 312, which are used to quickly remove the heat from the casting and avoid dimensional deviations caused by uneven cooling of the automotive motor base; Drive assembly: includes mounting base 401 and cylinder 4. Mounting base 401 is fixed to one end of sand recycling conveyor belt 2. Cylinder 4 is mounted obliquely upward on mounting base 401. The output end of cylinder 4 is fixedly connected to movable crossbeam 302. The tilt angle of cylinder 4 is consistent with the tilt angle of bearing member 3 on movable crossbeam 302. The extension and retraction of cylinder 4 can drive movable crossbeam 302 to move, so that the two sets of bearing members 3 can switch to staggered bearing state or single-sided bearing unloading state. Outlet mechanism: On the side of the fixed crossbeam 301 away from the movable crossbeam 302, there are multiple sets of downwardly inclined outlet components. The outlet components are arranged in a straight array, and their inclination direction is adapted to the inclination direction of the bearing component 3 on the fixed crossbeam 301. The upper surface of each set of bearing component 3 and outlet component is provided with multiple sets of rollers 308 to reduce the sliding resistance of the casting and avoid scratching the surface of the automotive motor base. The sand removal mechanism includes a roller conveyor belt 5 mounted above the baffle 201 of the sand recovery conveyor belt 2. The roller conveyor belt 5 consists of multiple independently rotating rollers with gaps between them (the gap width is adapted to the particle size of the molding sand). A sand removal device 6 is installed above the roller conveyor belt 5. The sand removal device 6 includes multiple sets of downward air-blowing nozzles to blow away residual molding sand from the surface of the casting, ensuring the assembly accuracy of the automotive motor base.

[0023] Furthermore, the inclination angle between the bearing member 3 on the fixed crossbeam 301 and the horizontal direction is 15°~35°. This angle setting can prevent the motor base of the automobile from sliding down too fast, ensuring both the elastic buffering effect and the smooth separation of molding sand from the gap of the bearing member 3.

[0024] Furthermore, the flexible hose 312 is a high-temperature resistant flexible pipeline with a temperature resistance of ≥120℃ and a pressure resistance of ≥0.6MPa. The branch interfaces of the inlet pipe 310 and the branch interfaces of the outlet pipe 311 are all equipped with seals at the connection points with the flexible hose 312 to prevent water leakage from affecting the operation of the equipment.

[0025] A method for casting motor base Based on the above-mentioned device, the specific steps include: S1: Casting and Molding Preparation The lost foam casting mold of the automotive motor base is placed in the suspended bottom unloading sand box 1 to complete the lost foam casting process. After the motor base casting is completely solidified and the temperature drops to 550℃~800℃, the casting post-processing unit is started for debugging. The control cylinder 4 extends and drives the movable crossbeam 302 to move, so that the fixed crossbeam 301 and the carrier 3 on the movable crossbeam 302 form an interlaced bearing state. The built-in water channel 309 of the carrier 3 is connected to the water inlet pipe 310 and water outlet pipe 311 of the crossbeam through the flexible hose 312. The pre-cooling system is started to circulate cold water in the water channel. The cold water inlet temperature is controlled at 15℃~30℃ and the water flow speed is 0.8m / s~1.5m / s to ensure that the temperature of the bearing surface does not exceed 120℃, so as to avoid high temperature damage to the carrier 3 and the surface of the automotive motor base.

[0026] S2: Casting unloading and buffer receiving The unloading structure at the bottom of the sand box is opened, and the cast automotive motor base part falls from the bottom of the sand box to the bearing angle formed by the staggered bearing parts 3. During the sliding process of the casting along the inclined surface of the bearing parts 3, the roller 308 reduces the sliding resistance. The bearing parts 3 move downward along the vertical slide groove 303 through the slider 304. The compression spring 307 achieves elastic buffering. The maximum vertical displacement of the bearing parts 3 is limited to 5mm~15mm by the cooperation of the limiting rod 305 and the limiting hole 306, so as to avoid the spring 307 from being over-compressed and failing, avoid impact damage to the casting, and protect the heat sink and thin-walled structure of the automotive motor base.

[0027] S3: Simultaneous separation of casting and molding sand During the falling and sliding process of the casting, the attached molding sand leaks out from the staggered gaps between the bearing components 3 and falls into the sand recycling conveyor belt 2 below. The sand recycling conveyor belt 2 transports the sand to the molding sand recycling station for recycling, realizing the simultaneous separation of sand and iron and reducing subsequent cleaning processes.

[0028] S4: Casting precooling and blanking switching The precooling system works continuously, and cold water carries away the heat conducted from the casting to the bearing surface through the built-in water channel 309 of the bearing component 3, precooling the casting to 400℃~500℃, reducing the internal stress of the casting, and ensuring the dimensional stability of the automotive motor base; the control cylinder 4 retracts, driving the movable crossbeam 302 to move the corresponding bearing component 3 away, leaving only the bearing component 3 on the fixed crossbeam 301 to form a feeding ramp, and the casting slides smoothly down the ramp.

[0029] S5: Casting Export and Transfer The casting slides down through the guide part on the side of the fixed crossbeam 301, and is assisted by the roller 308 to slide smoothly into the rotary conveyor belt 5; the rotary roller rotates independently to drive the casting to be conveyed to the sand removal station. During the conveying process, the molding sand remaining on the surface of the casting leaks out from the gap between the rotary rollers and falls into the sand recovery conveyor belt 2 to achieve secondary sand-iron separation.

[0030] S6: Online sand removal and subsequent processing. When the casting is transferred to the sand removal station, the sand removal device 6 above the roller conveyor belt 5 is activated. The nozzle blows air downwards to remove the residual sand particles attached to the surface of the casting. The air pressure is controlled at 0.4MPa~0.8MPa, and the distance between the nozzle and the surface of the casting is 150mm~300mm to ensure that the sand particles are completely removed without damaging the surface of the casting. The blown-off sand particles fall into the sand recovery conveyor belt 2 from the gap between the rollers. The casting that has completed sand removal is transported by the roller conveyor belt 5 to the subsequent heat treatment or machining station, and finally formed into a qualified motor base that meets the precision requirements of automobile assembly.

[0031] In this embodiment, during operation: S1: Casting and Molding Preparation The lost foam sand mold of the Y-series 355 motor base for new energy vehicles is placed in the suspended bottom unloading sand box 1 to complete the lost foam casting process. After the motor base casting is completely solidified (temperature drops to 700℃), the casting post-processing unit is started; the control cylinder 4 extends and drives the movable crossbeam 302 to move, so that the fixed crossbeam 301 and the bearing 3 on the movable crossbeam 302 form an interlaced bearing state; the pre-cooling system is turned on, the cold water inlet temperature is 20℃, and the water flow speed is 1.2m / s; S2: Casting unloading and buffer receiving Open the electric sliding plate unloading structure at the bottom of the sand box. The motor base casting falls from the bottom of the sand box to the bearing angle and slides along the roller 308 on the surface of the bearing 3. After the bearing 3 is pressed, it moves downward 8mm along the vertical slide groove 303 through the slider 304. The spring 307 is compressed to absorb the impact force, and there are no obvious impact marks on the casting. S3: Simultaneous separation of casting and molding sand During the sliding process of the casting, the attached molding sand leaks out from the gap between the bearings 3 and falls into the sand recycling conveyor belt 2, which then transports it to the molding sand recycling station. S4: Casting precooling and blanking switching The precooling system works continuously for 30 minutes, and the casting temperature drops to 450℃. The control cylinder 4 contracts, and the movable crossbeam 302 drives the carrier 3 to move away. The carrier 3 on the fixed crossbeam 301 forms a feeding ramp, and the casting slides smoothly down the ramp. S5: Casting Export and Transfer The casting is guided by the roller 308 of the guide bearing 3 and falls smoothly into the rotary conveyor belt 5. The rotary roller drives the casting to the sand removal station at a speed of 10r / min, and the residual molding sand leaks out from the gap between the rotary rollers. S6: Online Sand Removal and Follow-up Treatment The sand removal device 6 is activated, and the nozzle sprays air at a pressure of 0.6MPa to blow away the residual sand particles on the surface of the casting. The blown-off sand particles fall into the sand recycling conveyor belt 2. The casting that has completed sand removal is transported to the heat treatment station by the roller conveyor belt 5 and finally formed into a qualified motor base for new energy vehicles.

[0032] Implementation effect The Y-series 355 motor housing for new energy vehicles produced in this embodiment has a dimensional deviation of ≤±0.2mm, a surface roughness Ra=5.8μm, a heat sink integrity rate of 100%, a scrap rate of 2.1%, a single-piece production cycle shortened to 45 minutes, and a molding sand recovery rate of 96.5%, fully meeting the high-precision and mass production requirements of the automotive manufacturing industry for motor housings.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0034] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and simplifying the description, and do not 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.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] The above description is only a preferred embodiment 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 and forming device for an electric motor base, characterized in that, include: The lost foam casting molding unit includes a suspended bottom discharge sand box (1), which is used to hold the lost foam sand mold of the motor base. The bottom of the sand box is provided with a discharge structure for releasing the motor base casting and molding sand after casting. A casting post-processing unit is disposed below the sand box, and the post-processing unit includes: The sand recycling conveyor belt (2) is arranged horizontally, with baffles (201) on both sides, and a bracket (202) is fixed to the outside of the baffles (201). The receiving buffer mechanism is set between the sand box and the sand recycling conveyor belt (2), including a fixed crossbeam (301) and a movable crossbeam (302) arranged in parallel. The fixed crossbeam (301) is fixed between the two side supports (202). Multiple sets of strip-shaped support members (3) are installed one-to-one on the opposite side walls of the fixed crossbeam (301) and the movable crossbeam (302). The support members (3) all extend in an oblique upward direction, and the support members (3) on the fixed crossbeam (301) and the support members (3) on the movable crossbeam (302) are inclined in opposite directions. All support members (3) are arranged in a straight line along the length of the corresponding crossbeam, and the two sets of support members (3) are interspersed in space to form a support angle for supporting the high-temperature motor base casting after casting. The drive assembly includes a mounting base (401) and a cylinder (4). The mounting base (401) is fixed to one end of the sand recycling conveyor belt (2). The cylinder (4) is mounted obliquely upward on the mounting base (401). The output end of the cylinder (4) is fixedly connected to the movable crossbeam (302). The cylinder (4) can extend and retract to drive the movable crossbeam (302) to move, so that the two sets of bearing members (3) form an interlaced bearing state or a single-sided bearing unloading state. The sand removal mechanism includes a rotating conveyor belt (5) mounted above the baffle (201) of the sand recovery conveyor belt (2). The rotating conveyor belt (5) is composed of multiple independently rotating rollers with gaps between them. A sand removal device (6) is provided above the rotating conveyor belt (5). The sand removal device (6) includes multiple sets of downward air jet nozzles.

2. The motor base casting and forming device according to claim 1, characterized in that, Vertical grooves (303) are provided at the connection positions of the fixed crossbeam (301) and the movable crossbeam (302) with the corresponding bearing member (3). A limiting hole (306) is provided at the bottom of the groove. A slider (304) is fixedly connected to the end of the bearing member (3). The slider (304) slides with the vertical groove (303). A vertically extending limiting rod (305) is fixedly connected to the bottom of the slider (304). The limiting rod (305) is inserted with the limiting hole (306). A spring (307) is sleeved on the outside of the limiting rod (305). The two ends of the spring (307) abut against the bottom of the slider (304) and the bottom of the groove, respectively, to form an elastic buffer structure.

3. The motor base casting and forming device according to claim 1, characterized in that, The bearing member (3) has an internal water channel (309) along its length. The fixed crossbeam (301) and the movable crossbeam (302) are both provided with parallel water inlet pipes (310) and water outlet pipes (311) arranged laterally. The water inlet pipes (310) and water outlet pipes (311) are provided with branch interfaces corresponding to the position of each bearing member (3). The branch interfaces are connected to the two ends of the internal water channel (309) of the corresponding bearing member (3) through flexible hoses (312) to form a casting precooling system.

4. The motor base casting and forming device according to claim 1, characterized in that, The fixed crossbeam (301) has multiple sets of downwardly inclined guide members on the side away from the movable crossbeam (302). The guide members are arranged in a straight array, and their inclination direction is adapted to the inclination direction of the bearing member (3) on the fixed crossbeam (301) to guide the motor base casting to the roller conveyor belt (5).

5. The motor base casting and forming device according to claim 1, characterized in that, The fixed crossbeam (301) has multiple sets of downwardly inclined guide members on the side away from the movable crossbeam (302). The guide members are arranged in a straight array, and their inclination direction is adapted to the inclination direction of the bearing member (3) on the fixed crossbeam (301) to guide the motor base casting to the roller conveyor belt (5).

6. The motor base casting and forming device according to claim 5, characterized in that, Each set of the carrier (3) and the guide is provided with multiple sets of rollers (308) on its upper surface.

7. The motor base casting and forming device according to claim 1, characterized in that, The bearing members (3) on the fixed crossbeam (301) and the movable crossbeam (302) are inclined at an angle of 15° to 35° to the horizontal direction.

8. A method for casting and forming a motor base, implemented based on the apparatus described in any one of claims 1-7, characterized in that, Includes the following steps: S1: Casting preparation, place the lost foam sand mold of the motor base in the hanging bottom unloading sand box (1) to complete the lost foam casting process. After the motor base casting is completely solidified, start the debugging of the casting post-processing unit; control the cylinder (4) to extend and drive the movable crossbeam (302) to move, so that the fixed crossbeam (301) and the carrier (3) on the movable crossbeam (302) form an interlaced bearing state; connect the built-in water channel (309) of the carrier (3) to the water inlet pipe (310) and water outlet pipe (311) of the crossbeam through the flexible hose (312), start the pre-cooling system, and make the cold water circulate in the water channel; S2: Open the unloading structure at the bottom of the sand box, and the cast motor base casting falls from the bottom of the sand box to the bearing angle formed by the staggered bearing parts (3); during the process of the casting sliding along the surface of the inclined bearing parts (3), the bearing parts (3) move downward along the vertical slide groove (303) through the slider (304), and the compression spring (307) achieves elastic buffering to avoid impact damage to the casting; S3: During the falling and sliding process of the casting, the attached molding sand leaks out from the interlaced gaps between the bearings (3) and falls into the sand recycling conveyor belt (2) below, and is transported by the sand recycling conveyor belt (2) to the molding sand recycling station for recycling. S4: The precooling system continues to work. Cold water carries away the heat conducted from the casting to the bearing surface through the built-in water channel (309) of the bearing component (3), so that the casting is precooled to 400℃~500℃. The control cylinder (4) contracts, drives the movable crossbeam (302) to move the corresponding bearing component (3) away, leaving only the bearing component (3) on the fixed crossbeam (301) to form a feeding ramp, and the casting slides down the ramp smoothly. S5: The downward-sloping casting is guided by the guide piece on the side of the fixed crossbeam (301) and falls smoothly into the roller conveyor belt (5); the rollers rotate independently to drive the casting to the sand removal station. During the transfer, the molding sand remaining on the surface of the casting leaks out from the gap between the rollers and falls into the sand recovery conveyor belt (2). S6: When the casting is transferred to the sand removal station, the sand removal device (6) above the roller conveyor belt (5) is activated. The nozzle blows air downwards to remove the residual sand particles attached to the surface of the casting. The blown-off sand particles fall from the gap between the rollers into the sand recovery conveyor belt (2). The casting that has completed the sand removal is transported by the roller conveyor belt (5) to the subsequent heat treatment or machining station and finally formed into a qualified motor base.

9. The method for casting and forming a motor base according to claim 8, characterized in that, In step S1, the inlet temperature of the precooling system is controlled at 15℃~30℃, and the water flow velocity is 0.8m / s~1.5m / s.

10. The method for casting and forming a motor base according to claim 8, characterized in that, In step S6, the jet pressure of the sand removal device (6) is controlled at 0.4MPa~0.8MPa, and the distance between the nozzle and the surface of the casting is 150mm~300mm.

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