A conveying system for spiral sand cores of low-pressure casting water-cooling casing

Abstract

The present invention provides a conveying system for spiral sand cores of low-pressure casting water-cooling housing, comprising a sand core and a conveying device, wherein a core head is provided on the sand core, the conveying device comprises a core lowering station and a sand core feeding device, wherein the core lowering station is arranged on one side of the sand core feeding device; the core lowering station comprises a clamping robot and a clamping frame, wherein the clamping robot is arranged on the top of the clamping frame; a clamping hand is provided on the clamping robot; the sand core feeding device comprises a lock core workbench, a transmission mechanism, a lock core base and a detection device; the detection device comprises a detection camera and a diffuse reflection photoelectric switch, wherein the detection camera is arranged on the top surface of the lock core workbench near the core lowering station, and the diffuse reflection photoelectric switch is arranged on one side of the top surface of the lock core workbench; a clamping finger is provided on the clamping hand, and a clamping groove matching the shape of the clamping finger is provided on the core head. By utilizing the structure of the present invention, the sand core grabbing work can be completed quickly, continuously and stably.

Description

Technical Field

[0001] The invention relates to the technical field of motor casting, and in particular to a conveying system for spiral sand cores of a low-pressure casting water-cooling casing. Background Art

[0002] At present, in the low-pressure casting production of electric vehicle motor water-cooling casing, although most of them still use manual methods to perform core setting operations, the working temperature of the mold cavity in the low-pressure casting production of the water-cooling casing is as high as more than 300 degrees. There is a problem of high-temperature radiation in manual core setting, and the spiral sand core of the water-cooling casing is large in size and irregular in shape. The manual core setting operation is labor-intensive and inefficient, and has randomness and uncertainty, making it difficult to ensure installation accuracy and speed; in addition, since the sand core is made of resin sand shot by a core shooting machine, its strength is limited, and the shape of the spiral water channel sand core is complex, it is easily damaged by a slight collision during the core setting process.

[0003] In order to solve the above technical problems, a patent document in China with patent number 201811345354.4 and announcement date 2020.07.14 discloses a surface dipping process and method for making sand cores of new energy vehicle motors; including an immersion box; wherein a transfer assembly is fixed to one side of the immersion box, a dipping bracket assembly is fixed to the lower end of the transfer assembly, a conveyor belt is provided on the side of the transfer assembly away from the immersion box, and a support frame is provided on the side of the conveyor belt. The present invention is provided with a dip coating bracket assembly, and uses an openable connecting rod to fix the support plate to a column. When transferring to the conveyor belt, the connecting rod is opened to make the support plate fall on the upper end of the conveyor belt for transportation, thereby avoiding damage to the object caused by manual transfer and improving the quality. Among them, the patent document discloses the steps of transferring the motor casing casting sand core, which includes: moving the motor casing casting sand core on the support plate upward by a pneumatic telescopic rod, and then moving the sliding seat to move along the slide rail. When it moves to the upper end of the conveyor belt, the pneumatic telescopic rod is lowered to make the motor casing casting sand core on the support plate fall above the conveyor belt, and then the connecting rods at both ends are rotated to make the support plate fall on the upper end of the conveyor belt, and then the motor casing casting sand core on the support plate is transported to the lower end of the surface treatment assembly through the conveyor belt.

[0004] However, according to the technical solution disclosed in the document, the sand core is placed on the conveyor belt by the cooperation of a pneumatic telescopic rod and a sliding seat, and there is no sand core transfer detection mechanism, which may cause the sand core to be damaged or placed in the wrong position. Summary of the invention

[0005] The invention provides a conveying system for spiral sand cores of a low-pressure casting water-cooling casing. By utilizing the structure of the invention, the sand core grabbing work can be completed quickly, continuously and stably, and the sand core conveying can be carried out in a timely manner.

[0006] To achieve the above object, the technical solution of the present invention is: a conveying system for spiral sand cores of low-pressure casting water-cooling casing, comprising a sand core and a conveying device, wherein a core head is provided on the sand core, and the conveying device comprises a core lowering station and a sand core feeding device, wherein the core lowering station is arranged on one side of the sand core feeding device;

[0007] The core setting station comprises a clamping robot and a clamping frame. The clamping robot is arranged on the top of the clamping frame. A clamping hand is arranged on the clamping robot.

[0008] The sand core feeding device includes a lock core workbench, a transmission mechanism, a lock core base and a detection device. The transmission mechanism includes a synchronous wheel, a transmission belt, a conveying motor, an annular guide rail and a slide seat. The synchronous wheel and the annular guide rail are arranged on the top surface of the lock core workbench. There are more than two synchronous wheels. The synchronous wheel is arranged on the inner side of the annular guide rail. The outer side of the synchronous wheel is connected to the transmission belt. The conveying motor is arranged at the bottom of the lock core workbench and passes through the lock core workbench to be fixedly connected to the center of the synchronous wheel on one side. The slide seat is slidably arranged and connected to the annular guide rail. There is more than one slide seat on the annular guide rail. Each slide seat is fixedly connected to the lock core base, and the slide seat is connected to the transmission belt; a fixed protrusion is provided on the lock core base.

[0009] The detection device includes a detection camera and a diffuse reflection photoelectric switch. The detection camera is arranged on the top surface of the lock core workbench near the lower core station, and the diffuse reflection photoelectric switch is arranged on one side of the top surface of the lock core workbench.

[0010] The clamping hand is provided with clamping fingers, and the core head is provided with clamping grooves which match the shape of the clamping fingers.

[0011] In the above arrangement, the sand core is installed on the lock core base, the lock core base is fixed on the slide, the conveying motor drives the synchronous wheel to rotate, and the synchronous wheel drives the slide to rotate along the annular guide rail through the transmission belt, thereby driving the sand core to move; when the sand core moves to the bottom of the clamping hand, the sand core at the corresponding position is moved to the next workstation by the clamping robot and the clamping hand, and at the same time, the lock core base on the next slide on the annular guide rail moves to the bottom of the clamping hand, so that the sand core grabbing work can be completed quickly, continuously and stably.

[0012] Furthermore, openings are provided on both sides of the fixing protrusion. In this way, the core head of the sand core is used for positioning so that the sand core can be reliably and stably docked with the lock core base.

[0013] Furthermore, the lock core base is provided with a core head slot on one side of the opening of the fixing protrusion, and the shape of the core head slot matches the core head of the sand core, so as to further improve the accuracy of positioning the sand core on the lock core base.

[0014] Furthermore, a first connecting block is fixedly provided on the outer side of the transmission belt, a second connecting block is provided on the slide seat, the first connecting block and the second connecting block are connected by bolts, and the slide seat is connected to the transmission belt through the cooperation of the first connecting block and the second connecting block.

[0015] Furthermore, the slide seat is provided with more than two pulleys, and the slide seat is slidably connected to the annular guide rail by the pulley clamping. In this way, the slide seat can stably rotate along the annular guide rail, thereby improving the stability of the sand core when the lock core base rotates.

[0016] Furthermore, the clamping robot also includes a rotating base, a mechanical arm, a rotating arm, a first flexion-extension motor, a second flexion-extension motor, a motor and a rotating motor.

[0017] The rotating base includes a fixed base, a slewing bearing and a rotating base. The fixed base is fixedly arranged on the clamping frame. The outer ring of the slewing bearing is fixed on the fixed base. An outer gear ring is provided on the outer ring of the slewing bearing. The inner ring of the slewing bearing is fixed on the rotating base. The rotating motor is installed on the rotating base. The output end of the rotating motor is connected with a gear, and the gear is meshed with the outer gear ring. The first flexion and extension motor is installed on the rotating base. One end of the mechanical arm is fixedly connected to the output shaft of the first flexion and extension motor. The second flexion and extension motor is installed on one end of the rotating arm, and the other end of the mechanical arm is connected to the output shaft of the second flexion and extension motor. The rotating arm includes a connecting arm, a connecting base and a rotating shaft. The second flexion and extension motor is installed on the connecting arm, and the connecting base is connected to the connecting arm. The rotating shaft is installed on the connecting base through a bearing. A first gear is installed on the rotating shaft. Motors are respectively installed on the connecting base on both sides of the rotating shaft, and a second gear meshing with the first gear is provided on the output shaft of the motor. The clamping hand is installed on the rotating shaft.

[0018] The above setting drives the rotating base to drive the mechanical arm to rotate through the rotating motor, the first flexion and extension motor and the second flexion and extension motor drive the rotating arm to swing, and the motor drives the rotating shaft to rotate. Through the above actions, the clamping robot can quickly and accurately complete the grasping action of the sand core on the lock core base.

[0019] Furthermore, the clamping hand comprises a crossbeam, a hand-held cylinder and clamping fingers; the crossbeam is installed at the lower end of the rotating shaft, and finger cylinders are respectively installed at both ends of the crossbeam, and the clamping fingers are connected to the finger cylinders.

[0020] Furthermore, the output end of each finger cylinder is connected to two clamping fingers. In this way, each clamping cylinder drives two clamping fingers to clamp the clamping grooves on the core head that match the shape of the clamping fingers, so that the clamping hand can clamp accurately and stably.

[0021] Furthermore, a control touch screen is also provided on one side of the lock core workbench, so as to facilitate the control of the conveying device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0023] Figure 2 It is a schematic diagram of the structure of the clamping robot in the present invention.

[0024] Figure 3 It is a schematic diagram of the disassembled structure of the sand core feeding device in the present invention.

[0025] Figure 4 It is a structural schematic diagram of the transmission mechanism in the present invention.

[0026] Figure 5 It is a structural schematic diagram of the lock core base in the present invention.

[0027] Figure 6 It is a structural schematic diagram of the lock core base in the present invention with the sand core installed. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figure 1-Figure 6 As shown, a conveying system for spiral sand cores of low-pressure casting water-cooled casings includes a sand core and a conveying device. A core head 31 is provided on the sand core 3. The conveying device includes a core setting station 1 and a sand core feeding device 2. The core setting station 1 is arranged on one side of the sand core feeding device 2.

[0030] The core setting station 1 comprises a clamping robot 11 and a clamping frame 12 . The clamping robot 11 is arranged on the top of the clamping frame 12 . A clamping hand 111 is arranged on the clamping robot 11 .

[0031] The sand core feeding device 2 includes a lock core workbench 21, a transmission mechanism 22, a lock core base 23 and a detection device. The transmission mechanism 22 includes a synchronous wheel 221, a transmission belt 222, a conveying motor 223, an annular guide rail 224 and a slide 225. The synchronous wheel 221 and the annular guide rail 224 are arranged on the top surface of the lock core workbench 21. There are two synchronous wheels 221. The synchronous wheel 221 is arranged on the inner side of the annular guide rail 224. The outer side of the synchronous wheel 221 is connected to the transmission belt 222. The conveying motor 223 is arranged at the bottom of the lock core workbench 21 and passes through the lock core workbench 21. The center of the synchronous wheel 221 on one side is fixedly connected. The slide 225 is slidably arranged and connected to the annular guide rail 224. There is more than one slide 225 on the annular guide rail 224. Each slide 225 is fixedly connected to the lock core base 23, and the slide 225 is connected to the transmission belt 222; a fixed protrusion 231 is provided on the lock core base 23.

[0032] The detection device includes a detection camera 24 and a diffuse reflection photoelectric switch 25 . The detection camera 24 is arranged on the top surface of the lock core workbench 21 close to the lower core station 1 , and the diffuse reflection photoelectric switch 25 is arranged on one side of the top surface of the lock core workbench 21 .

[0033] The clamping hand 111 is provided with a clamping finger 1111 , and the core head 31 is provided with a clamping groove 3111 matching the shape of the clamping finger 1111 .

[0034] In the above arrangement, the sand core is installed on the lock core base, the lock core base is fixed on the slide, the conveying motor drives the synchronous wheel to rotate, and the synchronous wheel drives the slide to rotate along the annular guide rail through the transmission belt, thereby driving the sand core placed on the lock core base to move; the diffuse reflection photoelectric switch measures the sand core on the lock core base during the sand core transmission process, and transmits the signal of the detected sand core to the conveying motor through the controller, and controls the conveying motor to stop rotating according to the time point when the sand core is measured, so that the sand core accurately reaches the preparation core lowering station; if the sand core cannot be detected, the conveying motor continues to rotate; the detection principle of the diffuse reflection photoelectric switch is as follows: since the diffuse reflection photoelectric switch is a sensor that integrates a reflector and a transmitter, when the sand core passes through the diffuse reflection photoelectric switch, the object reflects the light emitted by the slow reflection reflector to the receiver, so the diffuse reflection photoelectric switch generates a switch signal for the conveying motor to stop rotating, and this detection method is a prior art;.

[0035] A visual inspection device is installed on one side of the core lowering station to detect whether the transmitted sand core can meet the position accuracy requirement. After the transmission belt stops rotating, the inspection camera takes a picture of the sand core head and the lock core base on one side of the core lowering station, and then compares it with the graphic template on the inner side of the fixed protrusion of the lock core base with the accurate core head, to detect whether the fixed seat of the core head is accurately installed on the lock core base. If the fixed seat of the core head is accurately installed on the lock core base, a feedback signal is given to the clamping robot; if the fixed seat of the core head is not accurately installed on the lock core base, an alarm is issued; specifically, the inspection camera takes a picture of the sand core head and the lock core base on one side of the core lowering station, and compares it with the graphic template on the inner side of the fixed protrusion of the lock core base with the accurate core head, to detect whether the fixed seat of the core head is accurately installed on the lock core base. The specific steps include: pre-storing the graphic of the accurate core head being installed into the inner side of the fixed protrusion of the lock core base, and when the inspection camera takes a picture of the sand core core on one side of the core lowering station After taking photos of the core head and the lock core base, the photo of the detected sand core head and the lock core base is compared with the preset photo to determine the similarities of the two pictures. The algorithm for determining the similarities adopts the existing similarity algorithm. If the similarity reaches more than 80%, it is determined that the fixing seat of the core head is installed accurately on the lock core base, otherwise, it is determined to be inaccurate. This detection method is a prior art; the clamping robot moves down to clamp, clamps the core head of the sand core according to the established direction, position and strength, the clamping fingers clamp the clamping groove on the core head, takes the sand core vertically upward from the lock core conveyor belt, and puts it into the next workstation. The lock core base above the sand core feeding device is reinstalled and positioned with the sand core, and the conveying motor is restarted to carry out the next round of sand core transmission, detection and positioning work. In this way, the photoelectric switch detects the sand core, controls the motor to stop, and the detection camera detects the installation position of the sand core head at the lock core base, so that it can be accurately positioned and automatically detected, and the sand core grabbing work can be completed accurately, quickly and stably.

[0036] In this embodiment, openings 2311 are provided on both sides of the fixing protrusion 231. In this way, the core head of the sand core is positioned with the opening 2311, so that the sand core can be reliably installed on the lock core base 223.

[0037] The lock core base 23 is provided with a core head slot 2312 on one side of the opening of the fixing protrusion 231, and the shape of the core head slot 2312 matches the core head of the sand core 31. In this way, the accuracy of positioning the sand core 3 on the lock core base 23 is further improved.

[0038] A first connecting block 2221 is fixedly provided on the outer side of the transmission belt 222, and a second connecting block 2222 is provided on the slide 225. The first connecting block 2221 and the second connecting block 2222 are connected by bolts, and the slide 225 is connected to the transmission belt 222 through the cooperation of the first connecting block 2221 and the second connecting block 2222.

[0039] The slide 225 is provided with 4 pulleys 2251, and the slide 225 is slidably connected to the annular guide rail 224 by clamping the pulleys 2251. In this way, the slide can stably rotate along the annular guide rail, thereby improving the stability of the sand core when the lock core base rotates.

[0040] The gripping robot 11 further includes a rotating base 112 , a mechanical arm 113 , a rotating arm 114 , a finger cylinder 115 , a first flexion-extension motor 116 , a second flexion-extension motor 117 , a motor 118 and a rotating motor 119 .

[0041] The rotating base 112 includes a fixed base 1121, a slewing bearing and a rotating base 1122. The fixed base 1121 is fixedly arranged on the clamping frame 12. The outer ring of the slewing bearing is fixed on the fixed base 1121. An outer gear ring is arranged on the outer ring of the slewing bearing. The inner ring of the slewing bearing is fixed on the rotating base 1122. The rotating motor 119 is installed on the rotating base 1122. The output end of the rotating motor 119 is connected to a gear, and the gear is meshed with the outer gear ring. The first flexion and extension motor 116 is installed on the rotating base 1122. One end of the mechanical arm 113 is fixedly connected to the output shaft of the first flexion and extension motor 116. The second flexion and extension motor 117 is installed on one end of the rotating arm 114. The other end of the mechanical arm 113 is connected to the output shaft of the second flexion and extension motor 117. The rotating arm 114 includes a connecting arm 1141, a connecting seat 1142 and a rotating shaft 1143; the second flexion and extension motor 117 is installed on the connecting arm 1141, the connecting seat 1142 is connected to the connecting arm 1141, the rotating shaft 1143 is installed on the connecting seat 1142 through a bearing, a first gear is installed on the rotating shaft 1143, motors 118 are installed on both sides of the rotating shaft on the connecting seat, and a second gear meshing with the first gear is provided on the output shaft of the motor 118. A crossbeam 1112 is installed at the lower end of the rotating shaft 1143, and finger cylinders 115 are installed at both ends of the crossbeam, and the finger cylinders 115 are connected to the clamping fingers 1111.

[0042] The above setting drives the gear through the rotating motor, and the gear acts on the outer gear ring to make the rotating seat and the rotating motor rotate, thereby realizing the rotation of the mechanical arm and the rotating arm; the first flexion and extension motor and the second flexion and extension motor drive the mechanical arm and the rotating arm to swing respectively, and the motor works to realize the rotation of the rotating shaft under the action of the first gear and the second gear, thereby driving the rotation of the clamping fingers. Through the above actions, the clamping robot can quickly and accurately complete the grasping action of the sand core on the lock core base.

[0043] A control touch screen 26 is also provided on one side of the lock core workbench 21. In this way, it is convenient to control the conveying device.

Claims

1. A conveying system for spiral sand cores of low-pressure casting water-cooling housings, comprising a sand core and a conveying device, wherein a core head is provided on the sand core. Features: The conveying device includes a core setting station and a sand core feeding device, wherein the core setting station is arranged on one side of the sand core feeding device; The core setting station includes a clamping robot and a clamping frame, wherein the clamping robot is arranged on the top of the clamping frame; and a clamping hand is arranged on the clamping robot; The sand core feeding device includes a lock core workbench, a transmission mechanism, a lock core base and a detection device. The transmission mechanism includes a synchronous wheel, a transmission belt, a conveying motor, an annular guide rail and a slide seat. The synchronous wheel and the annular guide rail are arranged on the top surface of the lock core workbench. There are more than two synchronous wheels. The synchronous wheel is arranged on the inner side of the annular guide rail. The outer side of the synchronous wheel is connected to the transmission belt. The conveying motor is arranged at the bottom of the lock core workbench and passes through the center of the synchronous wheel on one side of the lock core workbench. The slide seat is slidably arranged and connected to the annular guide rail. There are more than one slide seat on the annular guide rail. Each slide seat is fixedly connected to the lock core base, and the slide seat is connected to the transmission belt. A fixed protrusion is arranged on the lock core base. The lock core base is provided with a core head slot on one side of the opening of the fixed protrusion. The shape of the core head slot matches the core head of the sand core. The detection device includes a detection camera and a diffuse reflection photoelectric switch. The detection camera is arranged on the top surface of the lock core workbench near the lower core station, and the diffuse reflection photoelectric switch is arranged on one side of the top surface of the lock core workbench; The clamping hand is provided with clamping fingers, and the core head is provided with clamping grooves matching the shape of the clamping fingers; The slide seat is provided with more than two pulleys, and the slide seat is slidably connected to the annular guide rail through the pulley clamping; The core head and opening of the sand core are positioned so that the sand core can be installed on the base of the lock core; The diffuse reflection photoelectric switch detects the sand core on the lock core base during the sand core transmission process, and transmits the detected sand core signal to the conveying motor through the controller. The conveying motor is controlled to stop rotating according to the time point when the sand core is detected, so that the sand core can accurately reach the preparation position for core placement; After the transmission belt stops rotating, the detection camera takes a picture of the sand core head and the lock core base on one side of the core lowering station, and then compares it with the graphic template on the inside of the fixing protrusion of the lock core base to detect whether the installation of the core head fixing seat on the lock core base is accurate. If the installation of the core head fixing seat on the lock core base is accurate, a signal is fed back to the clamping robot; if the installation of the core head fixing seat on the lock core base is inaccurate, an alarm is issued.

2. A conveying system for spiral sand cores of low-pressure casting water-cooling casing according to claim 1, Features: Openings are arranged on both sides of the fixing protrusion.

3. A conveying system for spiral sand cores of low-pressure casting water-cooling casing according to claim 1, Features: A first connecting block is fixedly arranged on the outer side of the transmission belt, a second connecting block is arranged on the slide seat, the first connecting block and the second connecting block are connected by bolts, and the slide seat is connected to the transmission belt through the cooperation of the first connecting block and the second connecting block.

4. A conveying system for spiral sand cores for low-pressure casting water-cooling casing according to claim 1, Features: The gripping robot also includes a rotating base, a mechanical arm, a rotating arm, a first flexion-extension motor, a second flexion-extension motor, a motor and a rotating motor; The rotating base includes a fixed base, a slewing bearing and a rotating base. The fixed base is fixedly arranged on the clamping frame. The outer ring of the slewing bearing is fixed on the fixed base. An outer gear ring is provided on the outer ring of the slewing bearing. The inner ring of the slewing bearing is fixed on the rotating base. The rotating motor is installed on the rotating base. The output end of the rotating motor is connected with a gear, and the gear is meshed with the outer gear ring. The first flexion and extension motor is installed on the rotating base. One end of the mechanical arm is fixedly connected to the output shaft of the first flexion and extension motor. The second flexion and extension motor is installed on one end of the rotating arm, and the other end of the mechanical arm is connected to the output shaft of the second flexion and extension motor. The rotating arm includes a connecting arm, a connecting base and a rotating shaft. The second flexion and extension motor is installed on the connecting arm, and the connecting base is connected to the connecting arm. The rotating shaft is installed on the connecting base through a bearing. A first gear is installed on the rotating shaft. Motors are respectively installed on the connecting base on both sides of the rotating shaft, and a second gear meshing with the first gear is provided on the output shaft of the motor. The clamping hand is installed on the rotating shaft.

5. A conveying system for spiral sand cores of low-pressure casting water-cooling casing according to claim 4, Features: The clamping hand comprises a crossbeam, a hand-held cylinder and clamping fingers; the crossbeam is installed at the lower end of the rotating shaft, and finger cylinders are respectively installed at both ends of the crossbeam, and the clamping fingers are connected to the finger cylinders.

6. A conveying system for spiral sand cores of low-pressure casting water-cooling casing according to claim 5, Features: The output end of each finger cylinder is connected to two gripping fingers respectively.

7. A conveying system for spiral sand cores of low-pressure casting water-cooling casing according to claim 1, Features: A control touch screen is also provided on one side of the lock core workbench.

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