Automatic core assembling and lowering system for side frame integral core

Abstract

The utility model belongs to foundry technology field provides a side frame integral core automatic group core core -drawing system, including sand mould transfer positioning mechanism, sand core group core mechanism, sand core core -drawing mechanism, sand core station, group core mould and control system, sand mould transfer positioning mechanism is positioned sand mould through the sand mould positioning mechanism cooperation of clamping positioning hole that is provided with in sand box both ends side face, sand core group core mechanism carries out group core to sand core through group core subassembly, and the combined sand core is transferred through the transfer mechanism, and the sand core core -drawing mechanism puts the sand core that combines well into the sand mould that is positioned through the core -drawing subassembly cooperation transfer mechanism and completes the core -drawing, this system has realized the group core core -drawing automation operation of side frame integral core, has promoted the group core efficiency and the core -drawing precision, has reduced the manual consumption, has reduced the labour intensity, has improved the working environment, has improved the operation security.

Description

Technical Field

[0001] This utility model belongs to the field of casting technology and relates to the core setting of sand core in the side frame casting process, specifically an automated core setting system for the integral core of the side frame. Background Technology

[0002] In side-frame casting production, the core assembly and placement operations are typically complex and labor-intensive. Traditional core assembly and placement methods rely heavily on manual labor, which is not only inefficient but also makes it difficult to guarantee the accuracy of core assembly and placement. Improper operation can easily affect the quality of the casting. Furthermore, due to the large size and weight of the integral core, it is prone to breakage during the sand core turning process, leading to the scrapping of the sand core and further impacting production efficiency. With the continuous development of industrial automation, the requirements for automation in the casting process are becoming increasingly stringent. Therefore, developing an automated core assembly and placement system for side-frame integral cores has significant practical implications. Utility Model Content

[0003] The purpose of this invention is to provide an automatic core assembly and core placement system for the side frame integral core, which can automate the assembly and core placement of the side frame core, thereby improving production efficiency and casting precision.

[0004] The technical solution adopted by this utility model to achieve the above objectives is as follows: An automatic core assembly and core lowering system for side-frame integral cores includes a sand mold transfer and positioning mechanism, a sand core assembly mechanism, a sand core lowering mechanism, a sand core station, an assembly jig, and a control system. The sand mold transfer and positioning mechanism includes a sand box, a sand mold base plate, a sand mold track, and a sand mold positioning mechanism. The sand mold is fixed inside the sand box. Positioning pin holes and guide pin holes are machined at both ends of the sand box, and clamping positioning holes are provided on the sides of both ends of the sand box. The sand box is placed on the sand mold base plate, and the sand mold base plate cooperates with the sand mold track to transfer the sand box. The sand mold positioning mechanism is located above the core lowering station on the sand box base plate and is used to position the sand mold in the sand box. The sand core assembly mechanism... The system includes a core assembly assembly and a first transfer mechanism. The core assembly assembly is connected to the first transfer mechanism, which operates above the sand core station and the core assembly fixture. The sand mold core lowering mechanism includes a core lowering assembly and a second transfer mechanism, which are connected to each other. The second transfer mechanism operates above the core assembly fixture and the sand mold base plate. The core assembly fixture includes a core assembly base plate, support columns, and positioning contacts. The support columns and positioning contacts are arranged on the core assembly base plate according to the shape of the sand core. The positioning contacts are driven by a positioning contact drive mechanism located in the core assembly base plate to position the sand core on the core assembly fixture.

[0005] Furthermore, the sand mold positioning mechanism includes a lifting motor, a lifting gear, a lifting rack, a lifting arm, a lifting telescopic rod, a lifting support platform, a clamping positioning frame, and clamping positioning claws. The clamping positioning frame is slidably connected to the lower part of the lifting support platform via the telescopic rod, and clamping positioning claws are provided on the clamping positioning frame. The lower end of the lifting arm is fixed to the clamping positioning frame, and a lifting rack is fixed on the lifting arm. The lifting rack meshes with the lifting gear driven by the lifting motor, which is fixed on the lifting support platform. The clamping positioning claws of the sand mold positioning mechanism cooperate with the clamping positioning holes on the sand box to position the sand mold.

[0006] Furthermore, the clamping and positioning claws are set on the claw seats on both sides according to the coordinate dimensions of the clamping and positioning holes on the sand box. The clamping and positioning claws are driven by a hydraulic positioning mechanism, which includes a positioning telescopic rod, a hydraulic drive rod, and claw seats. Claw seats are set at both ends of the positioning telescopic rod, and the middle part of the positioning telescopic rod is connected and fixed to the clamping and positioning frame. The hydraulic drive rod is set between the claw seats on both sides. Two oil chambers are set at both ends inside the hydraulic drive rod. The two oil chambers are connected to the hydraulic pump for oil supply through the first hydraulic port and the second hydraulic port, respectively.

[0007] Furthermore, the core assembly includes a gripping bracket, a flipping bracket, a core assembly micro cylinder, a flexible clamping pad, a flipping shaft, a flipping bearing, a laser rangefinder, a flipping drive motor, a core assembly lifting rod, a core assembly lifting rack, a core assembly lifting gear, and a core assembly lifting drive servo motor. The core assembly lifting drive servo motor is connected to drive the core assembly lifting gear, which meshes with the core assembly lifting rack fixed on the core assembly lifting rod. Flipping shafts are provided at both ends of the flipping bracket, and the flipping shafts at both ends are connected to the gripping bracket through flipping bearings. A core assembly micro cylinder is provided on the gripping bracket according to the shape of the sand core, and a flexible clamping pad is installed on the core assembly micro cylinder.

[0008] Furthermore, the core lifting rod is also equipped with a core rotation servo motor. The output rotation shaft of the core rotation servo motor is sleeved and extends out of the core lifting rod and is connected and fixed to the flipping bracket.

[0009] Furthermore, the lower core assembly includes a lower core claw bracket, a lower core micro cylinder, a flexible pad, a lower core lifting rod, a lower core lifting rack, a lower core lifting gear, and a lower core lifting drive servo motor. The lower core lifting drive servo motor is connected to drive the lower core lifting gear, which meshes with the lower core lifting rack fixed on the lower core lifting rod. The lower end of the lower core lifting rod is connected to the lower core claw bracket, and the lower part of the lower core claw bracket is equipped with a lower core micro cylinder according to the sand core structure. Each lower core micro cylinder has a flexible pad at its telescopic end.

[0010] Furthermore, the structure of the first transfer mechanism is the same as that of the second transfer mechanism, including a longitudinal drive servo motor, a first longitudinal drive gear, a second longitudinal drive gear, a longitudinal drive shaft, a drive shaft support bearing, a third longitudinal drive gear, a longitudinal moving rack, a longitudinal slide rail, a longitudinal slider, a transverse support frame, a transverse slide rail, a transverse drive servo motor, a transverse drive gear, and a transverse drive rack. Both ends of the transverse support frame are connected to the longitudinal slide rail via longitudinal sliders. A longitudinal drive rack is located below the longitudinal slide rail, a transverse slide rail is located above the transverse support frame, and a drive shaft support bearing and a longitudinal drive shaft are located below the transverse support frame. The system is rotatably connected, with a third longitudinal drive gear at both ends of the longitudinal drive shaft and a second longitudinal drive gear in the middle. A longitudinal drive servo motor is fixed in the middle of the transverse support frame. The drive shaft of the longitudinal drive servo motor is connected to drive the first longitudinal drive gear, which meshes with the second longitudinal drive gear. The third longitudinal drive gear meshes with the longitudinal drive rack. A lifting support frame is slidably connected above the transverse slide rail. A transverse drive servo motor is fixed on one side of the lifting support frame. The drive shaft of the transverse drive servo motor is connected to drive the transverse drive gear, which meshes with the transverse drive rack fixed on the transverse support frame.

[0011] Furthermore, the positioning contact drive mechanism includes a cylinder seat, a cylinder body, a slide rod, and a compression spring. The cylinder body is connected and fixed to the core base plate through the cylinder seat. The slide rod and compression spring are installed inside the cylinder body. The slide rod and compression spring work together with high-pressure air to realize the reciprocating motion of the positioning contact. A high-pressure air interface is provided at the tail of the pneumatic cylinder body to connect to high-pressure air.

[0012] Furthermore, the control system includes a programmable logic controller (PLC), a touch screen, and sensors; the PLC is electrically connected to the miniature cylinders and drive servo motors of the sand mold transfer and positioning mechanism, the sand core assembly mechanism, the sand core unloading mechanism, and the core assembly fixture, and is used to control the operation of sand core assembly and sand mold unloading.

[0013] The beneficial effects of this utility model are: High core-setting precision: Through precise mechanical structure and advanced system control, the sand mold and sand core are accurately positioned, ensuring that the sand core is placed accurately in the designated position within the sand mold. This avoids positional deviations that may occur with manual core setting, improves product dimensional accuracy and consistency, and reduces product defects caused by core-setting quality. The core-setting speed is fast; the mechanical system rationally divides the complex core-setting process into several parts, and the coordinated movement between the parts greatly shortens the time of the entire core-setting process. Reduce labor consumption and lower labor intensity; the entire side frame casting process requires no manual intervention, only manual work at the sand core correction station, which greatly reduces the manual labor intensity in the sand core assembly and sand mold core placement process; It improves the working environment and enhances operational safety; it frees workers from harsh working conditions and improves the working environment; it avoids safety risks such as heavy object handling and mechanical collisions that may occur during manual core setting, reduces the incidence of work-related accidents, and improves the safety of the production process.

[0014] The system offers strong data traceability; the automated core assembly and placement system can be equipped with production data recording capabilities. Compared to traditional core assembly and placement operations, the new system can record detailed information such as the placement time, location, and operator for each sand core. This facilitates traceability and quality monitoring of the production process, allowing for quick and accurate identification of causes and implementation of corrective measures should problems arise. Attached Figure Description

[0015] Figure 1 This is a general structural diagram of the system of this utility model; Figure 2 This is a schematic diagram of the structure of the sand box in this utility model; Figure 3 This is a three-dimensional structural diagram of the sand mold positioning mechanism in this utility model; Figure 4 This is a bottom view of the sand mold positioning mechanism in this utility model; Figure 5 This is a side view of the sand mold positioning mechanism in this utility model; Figure 6 yes Figure 5 Cross-sectional view of A_A; Figure 7 This is a schematic diagram of the core assembly in this utility model; Figure 8 This is a cross-sectional view of the core assembly; Figure 9 This is a schematic diagram of the transfer mechanism in this utility model; Figure 10 This is a structural schematic diagram of the lower core component of this utility model; Figure 11 This is a bottom view of the lower core component; Figure 12 This is a schematic diagram of the structure of the core assembly fixture in this utility model; Figure 13 This is a cross-sectional view of one side of the core assembly fixture. Detailed Implementation

[0016] The preferred embodiments of the present invention will now be described with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0017] like Figures 1 to 13As shown, an automatic core assembly and core lowering system for a side frame integral core includes a sand mold transfer and positioning mechanism 1, a sand core assembly mechanism 2, a sand core lowering mechanism 3, a sand core station 4, a core assembly jig 5, and a control system. The sand mold transfer and positioning mechanism 1 includes a sand box 11, a sand mold base plate 12, a sand mold track 13, and a sand mold positioning mechanism 14. The sand mold 6 is fixed inside the sand box 11. The sand box 11 has positioning pin holes 111 and guide pin holes 112 machined at both ends for positioning the sand mold. Clamping positioning holes 113 are provided on the sides of both ends of the sand box 11. The sand box 11 is placed on the sand mold base plate 12, and the sand mold base plate 12 cooperates with the sand mold track 13 to transfer the sand box 11. The sand mold positioning mechanism 14 is located at the lower core position of the sand box base plate 12. The upper part includes a lifting motor 141, a lifting gear 142, a lifting rack 143, a lifting arm 144, a lifting telescopic rod 145, a lifting support platform 146, a clamping and positioning frame 147, and clamping and positioning claws 148. The clamping and positioning frame 147 is slidably connected to the lower part of the lifting support platform 146 via the telescopic rod 145, and the clamping and positioning claws 148 are provided on the clamping and positioning frame 147. The lower end of the lifting arm 144 is fixed to the clamping and positioning frame 147, and a lifting rack is fixed on the lifting arm 144. 142, the lifting rack 142 meshes with the lifting gear 142 driven by the lifting motor 141 fixed on the lifting support platform 146; the clamping and positioning jaws 148 of the sand mold positioning mechanism 14 cooperate with the clamping and positioning holes 113 on the sand box 11 to position the sand mold; the clamping and positioning jaws 148 are driven by a hydraulic positioning mechanism, which includes a positioning telescopic rod 149, a hydraulic drive rod 150, and jaw seats 151. Jaw seats 151 are provided at both ends of the positioning telescopic rod 149 for positioning. The telescopic rod 149 is connected and fixed to the clamping and positioning frame 147 in the middle. The hydraulic drive rod 150 is set between the two jaw seats 151 on both sides to drive the jaw seats 151 on both sides to close or separate. The hydraulic drive rod 150 has two oil chambers at both ends inside. The two oil chambers are connected to the hydraulic pump for oil supply through the first hydraulic port 152 and the second hydraulic port 153 respectively. The clamping and positioning jaws 148 are set on the jaw seats 151 on both sides according to the coordinate size of the clamping and positioning holes 113 on the sand box 11.

[0018] The sand core assembly mechanism 2 includes a core assembly component 21 and a first transfer mechanism 22. The core assembly component 21 is connected to the first transfer mechanism 22, and the first transfer mechanism 22 operates and transfers above the sand core station 4 and the core assembly fixture 5.

[0019] The core assembly 21 includes a gripping bracket 211, a flipping bracket 212, a core assembly miniature cylinder 213, a flexible clamping pad 214, a flipping shaft 215, a flipping bearing 216, a laser rangefinder 217, a flipping drive motor 218, a core assembly lifting rod 219, a core assembly lifting rack 220, a core assembly lifting gear 221, and a core assembly lifting drive servo motor 222. The core assembly lifting drive servo motor 222 drives the core assembly lifting gear 221, and the core assembly lifting gear 221 is fixed to the core assembly lifting rod 219. The core assembly rod 219 is equipped with a core assembly rotation servo motor 223. The output rotation shaft 224 of the core assembly rotation servo motor 223 is sleeved and extends out of the core assembly rod 219 and is connected and fixed to the flipping bracket 212. The flipping bracket 212 is equipped with flipping shafts 215 at both ends. The flipping shafts 215 at both ends are connected to the gripping bracket 211 through flipping bearings 216. The gripping bracket 211 is equipped with a core assembly micro cylinder 213 according to the shape of the sand core. A flexible clamping pad 214 is installed on the core assembly micro cylinder 213.

[0020] The sand mold core lowering mechanism 3 includes a core lowering assembly 31 and a second transfer mechanism 32. The core lowering assembly 31 is connected to the second transfer mechanism 32. The second transfer mechanism 32 operates and transfers above the core assembly jig 5 and the sand mold base plate 12.

[0021] The lower core assembly 31 includes a lower core claw bracket 311, a lower core micro cylinder 312, a flexible pad 313, a lower core lifting rod 314, a lower core lifting rack 315, a lower core lifting gear 316, and a lower core lifting drive servo motor 317. The lower core lifting drive servo motor 317 is connected to drive the lower core lifting gear 316. The lower core lifting gear 316 meshes with the lower core lifting rack 315 fixed on the lower core lifting rod 314. The lower end of the lower core lifting rod 314 is connected to the lower core claw bracket 311. The lower part of the lower core claw bracket 311 is equipped with a lower core micro cylinder 312 according to the sand core structure. Each lower core micro cylinder 312 has a flexible pad 313 at its telescopic end.

[0022] The first transfer mechanism 22 includes a longitudinal drive servo motor 221, a first longitudinal drive gear 222, a second longitudinal drive gear 223, a longitudinal drive shaft 224, a drive shaft support bearing 225, a third longitudinal drive gear 226, a longitudinal moving rack 227, a longitudinal slide rail 228, a longitudinal slider 229, a transverse support frame 230, a transverse slide rail 231, a transverse drive servo motor 232, a transverse drive gear 233, and a transverse drive rack 234. Both ends of the transverse support frame 230 are connected to the longitudinal slide rail 228 via the longitudinal slider 229. A longitudinal drive rack 227 is located below the longitudinal slide rail 228. A transverse slide rail 231 is located above the transverse support frame 230. A drive shaft support bearing 225 is located below the transverse support frame 230 and is rotatably connected to the longitudinal drive shaft 224. A third longitudinal drive gear 226 is provided at both ends of the drive shaft 224, and a second longitudinal drive gear 223 is provided in the middle of the longitudinal drive shaft 224. A longitudinal drive servo motor 221 is fixed in the middle of the transverse support frame 230. The drive shaft of the longitudinal drive servo motor 221 is connected to drive the first longitudinal drive gear 222. The first longitudinal drive gear 222 meshes with the second longitudinal drive gear 223. The third longitudinal drive gear 226 meshes with the longitudinal drive rack 227. A lifting support frame 235 is slidably connected above the transverse slide rail 231. A transverse drive servo motor 232 is fixed on one side of the lifting support frame 235. The drive shaft of the transverse drive servo motor 232 is connected to drive the transverse drive gear 233. The transverse drive gear 233 meshes with the transverse drive rack 234 fixed on the transverse support frame 230.

[0023] The mechanical structure of the second transfer mechanism 32 is the same as that of the first transfer mechanism 22.

[0024] The core assembly jig 5 includes a core assembly base plate 51, a support column 52, and a positioning contact 53. The support column 52 and the positioning contact 53 are arranged on the core assembly base plate 51 according to the shape of the sand core. The positioning contact 53 is driven by a positioning contact drive mechanism set in the core assembly base plate 51 to position the sand core on the core assembly jig 5. The positioning contact drive mechanism includes a cylinder seat 54, a cylinder body 55, a slide rod 56, and a compression spring 57. The cylinder body 55 is connected and fixed to the core assembly base plate 51 through the cylinder seat 54. The slide rod 56 and the compression spring 57 are set in the cylinder body 55. The slide rod 56 and the compression spring 57 work together with high-pressure air to realize the reciprocating motion of the positioning contact 53. A high-pressure air interface 58 is set at the tail of the cylinder body 55 for connecting high-pressure air.

[0025] The control system includes a programmable logic controller (PLC), a touch screen, and sensors. The PLC is electrically connected to the sand mold transfer and positioning mechanism, the sand core assembly mechanism, the sand core unloading mechanism, the miniature cylinders of the assembly fixture, and the drive servo motors, and is used to control the operation of sand core assembly and sand mold unloading.

[0026] The operation steps of the side frame integral core automatic core assembly and core lowering system include: S1, the sand box 11 moves to the core lowering station via the sand mold track 13.

[0027] S2. Position the sand mold using the sand mold positioning mechanism 14; The sand mold positioning mechanism 14 is activated, and the positioning telescopic rod 149 drives the clamping positioning claws 148 to move inward and insert them into the clamping positioning holes 113 on both sides of the sand box 11 until the sand box 11 is clamped. The sand box 11 is then lifted to a certain height by the lifting arm 144 and then slowly lowered to complete the sand mold positioning. At this time, the sand mold coordinates are consistent with the system preset coordinates, and the sand mold is ready for core placement.

[0028] S3. The sand core moves to sand core station 4 via the sand core track; When the core support plate moves to the sand core station 4, it triggers the signal sensor set on the sand core track. When the core support plate stops moving, the sand core has reached the sand core station 4.

[0029] S4. The core assembly component 21 of the core assembly mechanism 2 moves to the top of the lower sand core of the sand core station 4 through the first transfer mechanism 22. The specific operation process is as follows: The longitudinal drive servo motor 221 of the first transfer mechanism 22 is started, driving the first longitudinal drive gear 222, the second longitudinal drive gear 223, the longitudinal drive shaft 224, and the third longitudinal drive gear 226. The longitudinal drive rack 227 causes the transverse slide rail 230 to move longitudinally along the longitudinal slide rail 228 by means of the longitudinal slider 229. At the same time, the transverse drive servo motor 232 is started, driving the transverse drive gear 233. The transverse drive rack 234 causes the core assembly 21 to move laterally along the transverse slide rail 230. The above transverse and longitudinal movements enable the core assembly mechanism 2 to be positioned above the lower sand core.

[0030] S5. Grab and flip the lower sand core; The core lifting drive servo motor 222 starts, driving the core lifting gear 221 to rotate, which in turn drives the lifting rack 220, causing the core lifting rod 219 to move downwards. This causes the flipping bracket 212 and the gripping bracket 211 to reach the set height, after which the core lifting drive servo motor 222 stops working. At this time, the laser rangefinder 217 set at both ends of the gripping bracket 211 measures the distance between the sand core and both sides of the gripping bracket 211. When the distances on both sides are different, the system automatically runs the horizontal drive servo motor 232 to automatically adjust the distance from both ends of the gripping bracket 211 to the sand core until the distance values ​​are the same. Then, the core micro cylinder 213 is activated to push the flexible clamping pad 214 to move, slowly clamping the upper sand core. The core lifting drive servo motor 222 is then started to drive the core lifting gear 221, which in turn drives the core lifting rack 220 to move the core lifting rod 219 upwards. After reaching the set height, the upward movement stops. Then, the flipping drive motor 218 is started to rotate the gripping bracket 211 180°, completing the sand core flipping.

[0031] In addition, when it is necessary to adjust the horizontal angle of the sand core, the core rotation servo motor 223 is started, and the output rotation shaft 224 of the core rotation servo motor 223 drives the flipping bracket 212 to rotate the corresponding horizontal angle.

[0032] S6. Transfer the lower sand core to the top of the core assembly jig 5; After the sand core is flipped or rotated, the first transfer mechanism 22 moves to the designated position according to the coordinates set by the control system. Here, the coordinates of the core assembly jig are fixed values. It then descends to the set height, releases the flexible clamping pad 214, and places the lower sand core into the target position. S7. The lower sand core is clamped and fixed on the core assembly jig 5 by the positioning contact 53, which further positions the lower sand core and prevents the sand core from shifting during subsequent operations. At this time, the positioning contact 53 moves slowly under the action of the cylinder body 55 and the slide rod 56 to the position set by the control system. During this process, the positioning contact 53 pushes the sand core, making the coordinates of the lower sand core more accurate and fixing the lower sand core to prevent the sand core position from moving in subsequent operations. S8. Grab the upper sand core and place it onto the lower sand core on the core assembly jig 5; S9, the core support plate 4 moves forward, and the other core support plate moves to the sand core turning station. Repeat S4 to S7 to complete the core assembly operation of another side frame. S10, the core assembly jig 5 runs along the core assembly jig track to the core repair station for sand core processing, including sand core cleaning, sand core repair, and coating. S11. Core assembly jig 5 is reset along the core assembly jig track, and the sand core is ready to be installed. S12. Grab, transport, and insert the assembled sand core; S121, the longitudinal drive servo motor of the second transfer mechanism 32 is started, driving the first longitudinal drive gear, the second longitudinal drive gear, the longitudinal drive shaft, and the third longitudinal drive gear. Through the longitudinal drive rack, the transverse slide rail moves longitudinally along the longitudinal slide rail by means of the longitudinal slider. At the same time, the transverse drive servo motor is started, driving the transverse drive gear. Through the transverse drive rack, the lower core assembly 31 moves laterally along the transverse slide rail. The above-mentioned transverse and longitudinal movements enable the sand core lower core mechanism 3 to be positioned above the assembled sand core. S122, the lower core lifting drive servo motor 317 starts, drives the lower core lifting gear 316 to rotate, and then drives the lower core lifting rack 315, which in turn drives the lower core lifting rod 314 to move downward, thereby driving the lower core claw bracket 311 to reach the set height. After the lower core claw bracket 311 reaches the set height, the lower core lifting drive servo motor 317 stops working. S123, The lower core claw bracket 311 is set with a lower core micro cylinder 312 according to the sand core structure. It is activated and grips the assembled sand core under the clamping action of multiple flexible pads 313. S124. Start the lower core lifting drive servo motor 317 and the longitudinal drive servo motor and the transverse drive servo motor of the second transfer mechanism 32 to lift the assembled sand core and position the assembled sand core above the positioned sand mold by the sand core lower core mechanism 3 through transverse and longitudinal movement. S125. Restart the core lifting drive servo motor 317 to lower the assembled sand core to the set coordinate in the sand mold. Release the air from the micro cylinder 312 to loosen the clamping of the flexible pad 313, thus completing the core lowering operation.

[0033] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A side frame integral core automatic core assembly and core placement system, characterized in that: The system includes a sand mold transfer and positioning mechanism, a sand core assembly mechanism, a sand core lowering mechanism, a sand core station, a core assembly fixture, and a control system. The sand mold transfer and positioning mechanism comprises a sand box, a sand mold base plate, a sand mold track, and a sand mold positioning mechanism. The sand mold is fixed inside the sand box, which has positioning pin holes and guide pin holes machined at both ends. Clamping and positioning holes are provided on the sides of both ends of the sand box. The sand box is placed on the sand mold base plate, and the sand mold base plate cooperates with the sand mold track to transfer the sand box. The sand mold positioning mechanism is located above the lowering mechanism on the sand box base plate and is used to position the sand mold in the sand box. The sand core assembly mechanism includes a core assembly assembly component and a... A transfer mechanism is provided, in which the core assembly is connected to a first transfer mechanism, which operates above the sand core station and the core assembly fixture; the sand mold core lowering mechanism includes a core lowering assembly and a second transfer mechanism, in which the core lowering assembly is connected to the second transfer mechanism; the second transfer mechanism operates above the core assembly fixture and the sand mold base plate; the core assembly fixture includes a core assembly base plate, support columns, and positioning contacts, which are arranged on the core assembly base plate according to the shape of the sand core, and the positioning contacts are driven by a positioning contact drive mechanism set in the core assembly base plate to position the sand core on the core assembly fixture.

2. The automatic core assembly and core placement system for a side frame integral core according to claim 1, characterized in that: The sand mold positioning mechanism includes a lifting motor, a lifting gear, a lifting rack, a lifting arm, a lifting telescopic rod, a lifting support platform, a clamping positioning frame, and clamping positioning claws. The clamping positioning frame is slidably connected to the lower part of the lifting support platform via the telescopic rod, and clamping positioning claws are provided on the clamping positioning frame. The lower end of the lifting arm is fixed to the clamping positioning frame, and a lifting rack is fixed on the lifting arm. The lifting rack meshes with the lifting gear driven by the lifting motor, which is fixed on the lifting support platform. The clamping positioning claws of the sand mold positioning mechanism cooperate with the clamping positioning holes on the sand box to position the sand mold.

3. The automatic core assembly and core placement system for a side frame integral core according to claim 2, characterized in that: The clamping and positioning claws are set on the claw seats on both sides according to the coordinate dimensions of the clamping and positioning holes on the sand box. The clamping and positioning claws are driven by a hydraulic positioning mechanism, which includes a positioning telescopic rod, a hydraulic drive rod, and claw seats. Claw seats are set at both ends of the positioning telescopic rod, and the middle part of the positioning telescopic rod is connected and fixed to the clamping and positioning frame. The hydraulic drive rod is set between the claw seats on both sides. Two oil chambers are set at both ends inside the hydraulic drive rod. The two oil chambers are connected to the hydraulic pump for oil supply through the first hydraulic port and the second hydraulic port, respectively.

4. The automatic core assembly and core placement system for a side frame integral core according to claim 1, characterized in that: The core assembly includes a gripping bracket, a flipping bracket, a core assembly micro cylinder, a flexible clamping pad, a flipping shaft, a flipping bearing, a laser rangefinder, a flipping drive motor, a core assembly lifting rod, a core assembly lifting rack, a core assembly lifting gear, and a core assembly lifting drive servo motor. The core assembly lifting drive servo motor is connected to drive the core assembly lifting gear, which meshes with the core assembly lifting rack fixed on the core assembly lifting rod. Flipping shafts are provided at both ends of the flipping bracket, and the flipping shafts at both ends are connected to the gripping bracket through flipping bearings. A core assembly micro cylinder is provided on the gripping bracket according to the shape of the sand core, and a flexible clamping pad is installed on the core assembly micro cylinder.

5. The automatic core assembly and core placement system for a side frame integral core according to claim 4, characterized in that: The core lifting rod is also equipped with a core rotation servo motor. The output rotation shaft of the core rotation servo motor is sleeved and extends out of the core lifting rod and is connected and fixed to the flipping bracket.

6. The automatic core assembly and core placement system for a side frame integral core according to claim 1, characterized in that: The lower core assembly includes a lower core claw bracket, a lower core micro cylinder, a flexible pad, a lower core lifting rod, a lower core lifting rack, a lower core lifting gear, and a lower core lifting drive servo motor. The lower core lifting drive servo motor is connected to drive the lower core lifting gear. The lower core lifting gear meshes with the lower core lifting rack fixed on the lower core lifting rod. The lower end of the lower core lifting rod is connected to the lower core claw bracket. The lower part of the lower core claw bracket is equipped with a lower core micro cylinder according to the sand core structure. Each lower core micro cylinder has a flexible pad at its telescopic end.

7. The automatic core assembly and core placement system for a side frame integral core according to claim 1, characterized in that: The first and second transfer mechanisms have the same structure, each including a longitudinal drive servo motor, a first longitudinal drive gear, a second longitudinal drive gear, a longitudinal drive shaft, a drive shaft support bearing, a third longitudinal drive gear, a longitudinal moving rack, a longitudinal slide rail, a longitudinal slider, a transverse support frame, a transverse slide rail, a transverse drive servo motor, a transverse drive gear, and a transverse drive rack. Both ends of the transverse support frame are connected to the longitudinal slide rail via longitudinal sliders. A longitudinal drive rack is located below the longitudinal slide rail, and a transverse slide rail is located above the transverse support frame. A drive shaft support bearing is located below the transverse support frame and rotates with the longitudinal drive shaft. Next, a third longitudinal drive gear is set at both ends of the longitudinal drive shaft, and a second longitudinal drive gear is set in the middle of the longitudinal drive shaft. The longitudinal drive servo motor is fixed in the middle of the transverse support frame. The drive shaft of the longitudinal drive servo motor is connected to drive the first longitudinal drive gear. The first longitudinal drive gear meshes with the second longitudinal drive gear. The third longitudinal drive gear meshes with the longitudinal drive rack. A lifting support frame is slidably connected above the transverse slide rail. A transverse drive servo motor is fixed on one side of the lifting support frame. The drive shaft of the transverse drive servo motor is connected to drive the transverse drive gear. The transverse drive gear meshes with the transverse drive rack fixed on the transverse support frame.

8. The automatic core assembly and core placement system for a side frame integral core according to claim 1, characterized in that: The positioning contact drive mechanism includes a cylinder seat, a cylinder body, a slide rod, and a compression spring. The cylinder body is connected and fixed to the core base plate through the cylinder seat. The slide rod and compression spring are installed inside the cylinder body. The slide rod and compression spring work together with high-pressure air to realize the reciprocating motion of the positioning contact. A high-pressure air interface is provided at the tail of the pneumatic cylinder body for connecting high-pressure air.

9. The automatic core assembly and core placement system for a side frame integral core according to claim 1, characterized in that: The control system includes a programmable logic controller (PLC), a touch screen, and sensors. The PLC is electrically connected to the sand mold transfer and positioning mechanism, the sand core assembly mechanism, the sand core unloading mechanism, the miniature cylinders of the assembly fixture, and the drive servo motors, and is used to control the sand core assembly and sand mold unloading operations.

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