Sand core mold rapid assembly apparatus and assembly method

Abstract

The application discloses a kind of sand core mould fast assembly equipment and assembly method, the equipment includes: including fixed in workshop horizontal ground walking track assembly, and walking track assembly cross section is concave design;The sand core compaction device assembly is set on the walking track assembly, and the sand core compaction device assembly can walk along the concave type two sides of walking track assembly;The walking track assembly concave groove is embedded with the mandrel support assembly that can be carried out up and down movement and radial movement along the axial free travel, also embedded with the sand core support assembly that can be carried out up and down movement and radial movement along the axial free travel, and the walking track assembly end upper surface is provided with shaft end fixing frame.The application adopts horizontal assembly mode, can efficiently complete the whole sand core mould assembly task, reduce the requirement to site, reduce labor intensity, improve assembly security and efficiency.

Description

Technical Field

[0001] This invention relates to the field of rocket engine casing molding technology, specifically to a rapid assembly equipment and method for sand core molds. Background Technology

[0002] Solid rocket motors are the primary power source for various missile weapons today and have a wide range of applications in the aerospace field. The solid rocket motor casing serves as both the propellant tank and the combustion chamber, and also as the body of the rocket or missile. With the rapid development of rocket motor casing molding technology, more efficient sand core molds are beginning to be used in mass production.

[0003] Sand core molds are mainly used to form the internal holes and cavities of castings. Thin and long sand core molds can be divided into several small and simple sand cores, while large-sized sand core molds need to be assembled after the segmented processing is completed.

[0004] In existing technologies, the segmented assembly of sand core molds often adopts a vertical assembly method. However, vertical assembly has high site requirements, and the assembly process is inefficient and not very safe. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention proposes a rapid assembly device and method for sand core molds. The method employs a horizontal assembly approach, which reduces site requirements, lowers labor intensity, and improves assembly safety and efficiency.

[0006] To achieve the above objectives, this invention designs a rapid assembly device for sand core molds, which is used to sequentially mount multiple sand cakes onto a mandrel. Its special feature is that it includes a walking track assembly fixed on a horizontal ground in the factory, and the cross-section of the walking track assembly is concave.

[0007] The first end of the walking track assembly is provided with a sand cake flipping assembly, which is used to flip the sand cake that is placed vertically in the axial direction into a sand cake that is placed horizontally in the axial direction; a sand core pressing device assembly is mounted on the walking track assembly, which can travel along the concave sides of the walking track assembly.

[0008] A cantilever crane assembly is provided on the side of the walking track assembly near the sand cake flipping assembly. The cantilever crane assembly is used to suspend the axially horizontally placed sand cake and place it on the sand core pressing device assembly.

[0009] The concave groove of the travel track assembly contains at least two spaced-apart mandrel support assemblies for supporting the mandrels during the assembly process. Each mandrel support assembly can move freely along the axial direction within the concave groove and can move vertically and radially. The concave groove of the travel track assembly also contains several sand core support assemblies for supporting sand cakes. Each sand core support assembly can move freely along the axial direction within the concave groove and can move vertically and radially.

[0010] The upper surface of the end of the travel track assembly is provided with a shaft end fixing bracket, which is used to fix the end of the spindle.

[0011] The rapid assembly equipment for sand core molds also includes an electrical control assembly for programmable control.

[0012] Furthermore, the walking track assembly includes a walking frame with a concave cross-section. The upper surfaces of the concave sides of the walking frame are respectively provided with driving racks arranged along the axial direction and used to drive the sand core pressing device assembly to move. The two sides inside the concave side of the walking frame are respectively provided with linear guide rail assemblies arranged along the axial direction and used to drive the mandrel support assembly and the sand core support assembly to move.

[0013] Furthermore, the sand core clamping device assembly includes a traveling frame mounted on a traveling track assembly. A traveling motor is installed inside the traveling frame, and the traveling motor drives traveling gears mounted on the side of the traveling frame. Each traveling gear travels along a corresponding driving rack. Symmetrically arranged and axially extending clamping linear guide assemblies are mounted on the upper surface of the traveling frame. A clamping plate is slidably connected to each clamping linear guide assembly. A vertically arranged clamping frame is fixed to the upper surface of the first end of each clamping plate. A clamping cylinder is fixed to the traveling frame, and the movable end of the clamping cylinder is connected to the clamping frame, pushing the clamping frame and clamping plate to translate axially along the clamping linear guide assembly. A saddle for supporting the sand cake is fixed to the upper surface of the last end of each clamping plate, and a sensor for detecting whether the sand cake is in position is located below the saddle.

[0014] Furthermore, the cantilever crane assembly includes a rotatable frame fixed to the ground inside the factory building, the rotatable frame being connected to a hook for hooking sand cakes, and a winch motor for controlling the movement of the hook being fixed on the rotatable frame.

[0015] Furthermore, the spindle support assembly includes a spindle support block for supporting the spindle. A first worm gear reducer is disposed at the lower end of the spindle support block. A first support mounting plate is fixedly disposed on the lower end face of the first worm gear reducer. A first servo motor for driving the first worm gear reducer to move up and down is fixedly disposed on the upper surface of the first support mounting plate. A first adjusting linear guide rail assembly is disposed symmetrically and extends radially on the lower surface of the first support mounting plate. A first traveling mounting plate is slidably connected to the lower end of the first adjusting linear guide rail assembly. A first linear traveling motor assembly for driving the spindle support assembly to move axially is disposed on the lower end face of the first traveling mounting plate. A reset sensor is disposed on the lower end face of the spindle support block. When the spindle support block moves up and down to the lower limit position, the reset sensor provides a status signal to the electrical control assembly.

[0016] Furthermore, the sand core support assembly includes a sand core support block for supporting the sand core. A second worm gear reducer is provided at the lower end of the sand core support block. A second support mounting plate is fixedly provided on the lower end face of the second worm gear reducer. A second servo motor for driving the second worm gear reducer to move up and down is fixedly provided on the upper surface of the second support mounting plate. A second adjusting linear guide rail assembly is provided on the lower surface of the second support mounting plate, which is symmetrically arranged and extends radially. A second traveling mounting plate is slidably connected to the lower end of the second adjusting linear guide rail assembly. A second linear traveling motor assembly for driving the sand core support assembly to move axially is provided on the lower end face of the second traveling mounting plate. A limit proximity switch is provided on the lower end face of the sand core support block. When the sand core support block moves up and down to the lower limit position, the limit proximity switch provides a status signal to the electrical control assembly.

[0017] Furthermore, the shaft end fixing frame includes a fixing frame fixed to the upper surface of the end of the travel track assembly. The upper surface of the fixing frame is chiseled with an arc-shaped groove. A shaft end fixing sleeve is arranged symmetrically with the arc-shaped groove directly above the arc-shaped groove. Fixing plates extend radially to both sides of the shaft end fixing sleeve. The fixing plates are connected to the shaft end fixing frame by bolts. A semi-circular hard rubber pad matching the diameter of the spindle is embedded in the inner wall of the arc-shaped groove of the shaft end fixing sleeve.

[0018] Furthermore, it also includes a mandrel tensioning assembly for fixing the sand cake to the mandrel. The mandrel tensioning assembly includes two semi-circular cones sandwiched between the outer periphery of the mandrel and the inner periphery of the sand cake and arranged symmetrically. Each semi-circular cone has a flange extending radially from its end. Each flange extends to the outside of a metal bushing pre-embedded in the inner periphery of the sand cake. Each flange is fixed to the corresponding metal bushing by screws.

[0019] This invention also designs a rapid assembly method for sand core molds, applicable to the aforementioned rapid assembly equipment for sand core molds, characterized by the following steps:

[0020] S1) First, the electrical control assembly drives the first servo motor on the mandrel support assembly near the shaft end fixing frame through a preset program to raise the corresponding mandrel support block to a suitable height; the existing mandrel is hoisted above the sand core mold quick assembly equipment, and then the end of the mandrel is lowered into the arc groove of the fixing frame, and the other parts of the mandrel are lowered into the upper end of the mandrel support block. The end of the mandrel is clamped by the shaft end fixing sleeve to complete the fixing of the mandrel; the sand core mold is divided into several sections, each section is called a sand cake, and the sand cakes are numbered and marked as 1, 2, 3...N, and stacked around the sand cake flipping assembly in the assembly order;

[0021] S2) The No. 1 sand cake is hoisted above the sand core pressing device assembly by the cantilever crane assembly, and the No. 1 sand cake is placed on the saddle. After the No. 1 sand cake is placed stably, the No. 1 sand cake is assembled.

[0022] S3) After the sensor on the sand core clamping device assembly detects the signal, it sends a hoisting command to the electrical control assembly. The electrical control assembly controls the walking motor on the sand core clamping device assembly to drive the walking gear, so that the sand core clamping device assembly carries the No. 1 sand cake and moves along the direction of the shaft end fixing frame. At this time, for sand cakes with different numbers, the electrical control assembly drives the first servo motor on the mandrel support assembly near the shaft end fixing frame through a preset program to adjust the center height of the mandrel during the assembly process to adapt to sand cakes of different diameters, so that the center hole of the No. 1 sand cake passes through the mandrel and stops when it runs to the waiting area between the two mandrel support assemblies.

[0023] S4) Start the first servo motor on the mandrel support assembly away from the shaft end fixing frame, so that the corresponding mandrel support block rises and presses against the mandrel; then start the first servo motor on the mandrel support assembly close to the shaft end fixing frame, so that the corresponding mandrel support block falls back to the lowest point position. At this time, the corresponding reset sensor is triggered, indicating that the sand core clamping device assembly can continue to move forward.

[0024] S5) After the sand core clamping device assembly brings the No. 1 sand cake to the predetermined position on the mandrel, it stops. The mandrel tensioning assembly is installed between the mandrel and the center positioning hole of the No. 1 sand cake to lock the No. 1 sand cake on the mandrel, thus completing the assembly of the No. 1 sand cake.

[0025] S6) When the sand core clamping device assembly returns to the waiting area between the two mandrel support assemblies, it pauses and starts the second servo motor on the sand core support assembly, causing the corresponding sand core support block to rise and support the installed No. 1 sand cake; the first servo motor on the mandrel support assembly away from the shaft end fixing frame is started, causing the corresponding mandrel support block to fall back to the lowest point position. At this time, the corresponding reset sensor is triggered, indicating that the sand core clamping device assembly can continue to return to the initial position.

[0026] S7) Apply glue to the end face of sand cake No. 2 beforehand, repeat steps S2) to S6) to complete the assembly of sand cake No. 2, and return the sand core clamping device assembly to the initial position.

[0027] S8) After all the sand cakes are installed, lock the first end of the mandrel to complete the assembly work and wait for transportation.

[0028] Furthermore, in S2), before hoisting the sand cake by the cantilever crane assembly, the end face of the sand cake is cleaned of loose sand and preparations are made for hoisting.

[0029] The advantages of this invention are:

[0030] 1. This invention is used for assembling large-size sand core molds, can adapt to the assembly needs of different models of sand core molds, is easy to adjust, and facilitates users to switch between production needs of different products.

[0031] 2. This invention adopts a horizontal assembly method, which is fast, precise, safe and reliable.

[0032] 3. The adjacent sand cores of the present invention are bonded by pneumatic compression, which can effectively prevent problems such as weak bonding and edge damage;

[0033] 4. The present invention is simple to operate during assembly, and manual intervention can be stopped at any time to repair the sand core;

[0034] The present invention relates to a rapid assembly equipment and method for sand core molds. It adopts a horizontal assembly method, which can efficiently complete the assembly task of the entire sand core mold, reduce site requirements, reduce labor intensity, and improve assembly safety and efficiency. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of the rapid assembly equipment for sand core molds in this invention when the sand core is not installed;

[0036] Figure 2 This is a schematic diagram of the overall structure of the rapid assembly equipment for sand core molds in this invention when assembling an installed sand core;

[0037] Figure 3 for Figure 2 A schematic diagram of the structure of the walking track assembly;

[0038] Figure 4 for Figure 2 A schematic diagram of the structure of the shaft end fixing bracket;

[0039] Figure 5 for Figure 2 A schematic diagram of the structure of the core clamping device assembly in the middle;

[0040] Figure 6for Figure 2 A schematic diagram of the structure of the sand core support assembly;

[0041] Figure 7 for Figure 2 A schematic diagram of the mandrel support assembly in the middle;

[0042] Figure 8 for Figure 2 A schematic diagram of the exploded structure of the two spindle tensioning assemblies;

[0043] Figure 9 for Figure 2 A schematic diagram of the sand cake flipping assembly in the middle;

[0044] Figure 10 This is a flowchart of the rapid assembly method for sand core molds in this invention;

[0045] In the diagram: 1. Shaft end fixing frame; 2. Traveling track assembly; 3. Cantilever crane assembly; 4. Sand core pressing device assembly; 5. Sand core support assembly; 6. Mandrel support assembly; 7. Mandrel tensioning assembly; 8. Mandrel; 9. Electrical control assembly; 10. Sand cake flipping assembly.

[0046] The shaft end fixing bracket 1 includes: fixing bracket 1-1, shaft end fixing sleeve 1-2, fixing plate 1-3, and hard rubber pad 1-4;

[0047] The travel track assembly 2 includes: a travel frame 2-1, a drive rack 2-2, and a linear guide assembly 2-3;

[0048] The cantilever crane assembly 3 includes: a rotatable hanger 3-1, a hook 3-2, and a winch motor 3-3;

[0049] The sand core clamping device assembly 4 includes: a walking frame 4-1, a clamping plate 4-2, a clamping linear guide rail assembly 4-3, a walking motor 4-4, a walking gear 4-5, a saddle 4-6, a clamping cylinder 4-7, a clamping frame 4-8, and a sensor 4-9.

[0050] The sand core support assembly 5 includes: sand core support block 5-1, second servo motor 5-2, limit proximity switch 5-3, second linear travel motor assembly 5-4, second adjusting linear guide rail assembly 5-5, second support mounting plate 5-6, second travel mounting plate 5-7, and second worm gear reducer 5-8.

[0051] The spindle support assembly 6 includes: a spindle support block 6-1, a first servo motor 6-2, a reset sensor 6-3, a first linear motion motor assembly 6-4, a first adjustable linear guide rail assembly 6-5, a first support mounting plate 6-6, a first travel mounting plate 6-7, and a first worm gear reducer 6-8.

[0052] The spindle tensioning assembly 7 includes: a semi-circular cone 7-1 and a flange 7-2;

[0053] The sand cake turning assembly 10 includes: a turning frame 10-1, a drive wheel 10-2, a turning frame 10-3, and a drive motor system 10-4. Detailed Implementation

[0054] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0055] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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 invention.

[0056] like Figures 1-9 As shown, the sand core mold rapid assembly equipment of the present invention is used to sequentially mount multiple sand cakes onto the mandrel 8, including a walking track assembly 2 fixed on the horizontal ground inside the factory, and the cross-section of the walking track assembly 2 is concave.

[0057] The first end of the walking track assembly 2 is provided with a sand cake flipping assembly 10, which is used to flip the sand cake that is placed vertically in the axial direction into a sand cake that is placed horizontally in the axial direction; a sand core pressing device assembly 4 is mounted on the walking track assembly 2, which can travel along the concave sides of the walking track assembly 2.

[0058] Specifically, the mandrel 8 is a hollow shaft structure with locking thread sections and locking nuts at both ends, and the middle positioning section can position the sand core mold.

[0059] Preferably, the walking track assembly 2 includes a walking frame 2-1 with a concave cross-section. The upper surfaces of the concave sides of the walking frame 2-1 are respectively provided with driving racks 2-2 arranged along the axial direction and used to drive the sand core pressing device assembly 4. The two sides inside the concave side of the walking frame 2-1 are respectively provided with linear guide rail assemblies 2-3 arranged along the axial direction and used to drive the mandrel support assembly 6 and the sand core support assembly 5.

[0060] Driven by a motor, the sand core clamping device assembly 4 can travel linearly on the linear guide assembly 2-3. Similarly, the mandrel support assembly 6 and the sand core support assembly 5 can travel independently on the linear guide assembly 2-3, and their working positions can be adjusted.

[0061] Preferably, the sand core clamping device assembly 4 includes a traveling frame 4-1 mounted on the traveling track assembly 2. A traveling motor 4-4 is installed inside the traveling frame 4-1. The traveling motor 4-4 drives traveling gears 4-5 mounted on the side of the traveling frame 4-1. Each traveling gear 4-5 travels along a corresponding driving rack 2-2. A symmetrically arranged, axially extending clamping linear guide assemblies 4-3 are mounted on the upper surface of the traveling frame 4-1. Each clamping linear guide assembly 4-3 is slidably connected to... There is a pressing plate 4-2; a vertically arranged pressing frame 4-8 is fixed on the upper surface of the first end of each pressing plate 4-2; a pressing cylinder 4-7 is fixed on the traveling frame 4-1, and the movable end of the pressing cylinder 4-7 is connected to the pressing frame 4-8, pushing the pressing frame 4-8 and the pressing plate 4-2 to translate axially along the pressing linear guide assembly 4-3; a saddle 4-6 for carrying the sand cake is fixed on the upper surface of the end of each pressing plate 4-2, and a sensor 4-9 for detecting whether the sand cake is in place is provided below the saddle 4-6.

[0062] Preferably, the sand cake flipping assembly 10 includes a flipping frame 10-1, a drive wheel 10-2, a flipping frame 10-3, and a drive motor system 10-4, which can flip a sand cake that is placed vertically in the axial direction into a sand cake that is placed horizontally in the axial direction by 90°, which facilitates assembly.

[0063] The walking track assembly 2 is provided with a cantilever crane assembly 3 on the side near the end of the sand cake flipping assembly 10. The cantilever crane assembly 3 is used to suspend the horizontally placed sand cake and place it on the sand core pressing device assembly 4.

[0064] Preferably, the cantilever crane assembly 3 includes a rotatable hanger 3-1 fixed on the ground inside the factory building. The rotatable hanger 3-1 is connected to a hook 3-2 for hooking the sand cake. A winch motor 3-3 for controlling the movement of the hook 3-2 is fixed on the rotatable hanger 3-1.

[0065] The concave groove of the walking track assembly 2 contains at least two spaced-apart mandrel support assemblies 6 for supporting the mandrel 8 during the assembly process. Each mandrel support assembly 6 can move freely along the axial direction within the concave groove, and each mandrel support assembly 6 can move up and down and radially. The concave groove of the walking track assembly 2 also contains a plurality of sand core support assemblies 5 for supporting sand cakes. Each sand core support assembly 5 can move freely along the axial direction within the concave groove, and each sand core support assembly 5 can move up and down and radially.

[0066] Preferably, the spindle support assembly 6 includes a spindle support block 6-1 for supporting the spindle 8. A first worm gear reducer 6-8 is provided at the lower end of the spindle support block 6-1. A first support mounting plate 6-6 is fixedly provided on the lower end face of the first worm gear reducer 6-8. A first servo motor 6-2 for driving the first worm gear reducer 6-8 to move up and down is fixedly provided on the upper surface of the first support mounting plate 6-6. A first adjusting linear guide rail assembly 6-5 is symmetrically arranged and extends radially on the lower surface of the first adjusting linear guide rail assembly 6-5. A first traveling mounting plate 6-7 is slidably connected to the lower end of the first adjusting linear guide rail assembly 6-5. A first linear traveling motor assembly 6-4 for driving the spindle support assembly 6 to move axially is provided on the lower end face of the first traveling mounting plate 6-7. A reset sensor 6-3 is provided on the lower end face of the spindle support block 6-1. When the spindle support block 6-1 moves up and down to the lower limit position, the reset sensor 6-3 provides a status signal to the electrical control assembly 9.

[0067] Adjusting the first adjusting linear guide assembly 6-5 can adjust the radial working position of the spindle support assembly 6 to accommodate different spindles. The first linear travel motor assembly 6-4 drives the axial movement of the spindle support assembly 6, adjusting its position on the travel track assembly 2.

[0068] Preferably, the sand core support assembly 5 includes a sand core support block 5-1 for supporting the sand core. A second worm gear reducer 5-8 is provided at the lower end of the sand core support block 5-1. A second support mounting plate 5-6 is fixedly provided on the lower end face of the second worm gear reducer 5-8. A second servo motor 5-2 for driving the second worm gear reducer 5-8 to move up and down is fixedly provided on the upper surface of the second support mounting plate 5-6. A second adjusting linear guide rail assembly 5-5 is symmetrically arranged and extends radially on the lower surface of the second adjusting linear guide rail assembly 5-5. A second traveling mounting plate 5-7 is slidably connected to the lower end of the second adjusting linear guide rail assembly 5-5. A second linear traveling motor assembly 5-4 for driving the sand core support assembly 5 to move axially is provided on the lower end face of the second traveling mounting plate 5-7. A limit proximity switch 5-3 is provided on the lower end face of the sand core support block 5-1. When the sand core support block 5-1 moves up and down to the lower limit position, the limit proximity switch 5-3 provides a status signal to the electrical control assembly 9.

[0069] Adjusting the second adjusting linear guide assembly 5-5 allows for adjustment of the radial working position of the sand core support assembly 5, adapting to different sand core molds. The second linear travel motor assembly 5-4 drives the axial movement of the sand core support assembly 5, adjusting its position on the travel track assembly 2.

[0070] The upper surface of the end of the walking track assembly 2 is provided with a shaft end fixing bracket 1, which is used to fix the end of the spindle 8.

[0071] Preferably, the shaft end fixing frame 1 is made of welded steel profiles and includes a fixing frame 1-1 fixed to the upper surface of the end of the travel track assembly 2. The upper surface of the fixing frame 1-1 is chiseled with an arc-shaped groove. A shaft end fixing sleeve 1-2 is arranged symmetrically with the arc-shaped groove directly above the arc-shaped groove. Fixing plates 1-3 extend radially to both sides of the shaft end fixing sleeve 1-2. The fixing plates 1-3 are connected to the shaft end fixing frame 1 by bolts. The inner wall of the arc-shaped groove of the shaft end fixing sleeve 1-2 is inlaid with a semi-circular hard rubber pad 1-4 that matches the shaft diameter of the spindle 8.

[0072] Hard rubber pads 1-4 are embedded in the inner wall of the arc-shaped groove of the shaft end fixing sleeve 1-2, which can accommodate a certain range of swing angles when fixing the mandrel 8, facilitating centering adjustment during assembly. Various sizes of shaft end fixing sleeves 1-2 are available for easy replacement and are suitable for mandrels 8 with different diameters.

[0073] The rapid assembly equipment for sand core molds also includes an electrical control assembly 9 for programmable control. The electrical control assembly 9 comprises various components such as wires, signal lines, air pipes, solenoid valves, electrical control cabinets, touch screens, frequency converters, and PLCs, enabling programmable control.

[0074] This rapid assembly equipment for sand core molds also includes a mandrel tensioning assembly 7, which is used to fix the sand cake on the mandrel 8. The mandrel tensioning assembly 7 includes two semi-circular cones 7-1 sandwiched between the outer periphery of the mandrel 8 and the inner periphery of the sand cake and arranged symmetrically. Each semi-circular cone 7-1 has a flange 7-2 extending radially from its end. Each flange 7-2 extends to the outside of a metal bushing pre-embedded in the inner periphery of the sand cake. Each flange 7-2 is fixed to the corresponding metal bushing by screws.

[0075] Between the mandrel 8 and the sand cake, several mandrel tensioning assemblies 7 of different specifications and sizes are used for tensioning and are fixed with screws.

[0076] This invention also provides a rapid assembly method for sand core molds, applicable to the aforementioned rapid assembly equipment for sand core molds, comprising the following steps:

[0077] S1) First, the electrical control assembly 9 drives the first servo motor 6-2 on the spindle support assembly 6 near the shaft end fixing frame 1 through a preset program, raising the corresponding spindle support block 6-1 to a suitable height; the existing spindle 8 is hoisted above the sand core mold quick assembly equipment, and then the end of the spindle 8 is lowered and placed in the arc groove of the fixing frame 1-1, and the other positions of the spindle 8 are lowered and placed on the upper end of the spindle support block 6-1. The end of the spindle 8 is clamped by the shaft end fixing sleeve 1-2, completing the fixing of the spindle 8; the sand core mold is divided into several sections, each section is called a sand cake, and the sand cakes are numbered and marked as 1, 2, 3...N, and stacked around the sand cake flipping assembly 10 in the assembly order.

[0078] S2) The No. 1 sand cake is hoisted to the top of the sand core pressing device assembly 4 by the cantilever crane assembly 3, and the No. 1 sand cake is placed on the saddle 4-6. After the No. 1 sand cake is placed stably, the No. 1 sand cake is assembled.

[0079] Preferably, before hoisting the sand cake by the cantilever crane assembly 3, the end face of the sand cake should be cleaned of loose sand and preparations for hoisting should be made in advance.

[0080] S3) After the sensor 4-9 on the sand core clamping device assembly 4 detects the signal, it sends a hoisting command to the electrical control assembly 9. The electrical control assembly 9 controls the walking motor 4-4 on the sand core clamping device assembly 4 to run, driving the walking gear 4-5, so that the sand core clamping device assembly 4 carries the No. 1 sand cake and moves along the direction of the shaft end fixing frame 1. At this time, for sand cakes with different numbers, the electrical control assembly 9 drives the first servo motor 6-2 on the mandrel support assembly 6 near the shaft end fixing frame 1 through a preset program to adjust the center height of the mandrel 8 during the assembly process, adapting to sand cakes of different diameters, so that the center hole of the No. 1 sand cake passes through the mandrel 8, and stops when it runs to the waiting area between the two mandrel support assemblies 6.

[0081] S4) Start the first servo motor 6-2 on the spindle support assembly 6 away from the shaft end fixing frame 1, so that the corresponding spindle support block 6-1 rises and presses against the spindle 8; then start the first servo motor 6-2 on the spindle support assembly 6 near the shaft end fixing frame 1, so that the corresponding spindle support block 6-1 falls back to the lowest position. At this time, the corresponding reset sensor 6-3 is triggered, indicating that the sand core clamping device assembly 4 can continue to move forward.

[0082] S5) After the sand core pressing device assembly 4 brings the No. 1 sand cake to the predetermined position on the mandrel 8, it stops. The mandrel tensioning assembly 7 is installed between the mandrel 8 and the center positioning hole of the No. 1 sand cake to lock the No. 1 sand cake on the mandrel 8, thus completing the assembly of the No. 1 sand cake.

[0083] S6) When the sand core clamping device assembly 4 returns to the waiting area between the two mandrel support assemblies 6, it pauses and starts the second servo motor 5-2 on the sand core support assembly 5, causing the corresponding sand core support block 5-1 to rise and support the installed No. 1 sand cake; start the first servo motor 6-2 on the mandrel support assembly 6 away from the shaft end fixing frame 1, causing the corresponding mandrel support block 6-1 to fall back to the lowest point position. At this time, the corresponding reset sensor 6-3 is triggered, indicating that the sand core clamping device assembly 4 can continue to return to the initial position.

[0084] S7) Apply glue to the end face of sand cake No. 2 beforehand, repeat steps S2) to S6) to complete the assembly of sand cake No. 2, and return the sand core clamping device assembly 4 to the initial position.

[0085] S8) After all the sand cakes are installed, lock the head of the mandrel 8 to complete the assembly work and wait for transportation.

[0086] Specifically, in S4), the sand core support assembly 5 is used to rise and support the sand cake, providing sufficient support force. The purpose is to prevent the mandrel 8 from bending and deforming as the overall mass of the sand core mold increases with the assembly of the sand cake. If the mandrel is short and the number of sand cakes installed is small, the number of sand core support assemblies 5 used for support can be reduced as appropriate according to the degree of bending deformation of the mandrel 8.

[0087] The present invention relates to a rapid assembly equipment and method for sand core molds. It adopts a horizontal assembly method, which can efficiently complete the assembly task of the entire sand core mold, reduce site requirements, reduce labor intensity, and improve assembly safety and efficiency.

[0088] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A rapid assembly device for sand core molds, used to sequentially mount multiple sand cakes onto a mandrel (8), characterized in that: Includes a walking track assembly (2) fixed on the horizontal ground inside the factory, and the cross-section of the walking track assembly (2) is concave; The first end of the walking track assembly (2) is provided with a sand cake flipping assembly (10), which is used to flip the sand cake placed vertically in the axial direction into a sand cake placed horizontally in the axial direction; a sand core pressing device assembly (4) is mounted on the walking track assembly (2), which can travel along the concave sides of the walking track assembly (2). The walking track assembly (2) is provided with a cantilever crane assembly (3) on the side near the end of the sand cake flipping assembly (10). The cantilever crane assembly (3) is used to suspend the sand cake that is placed horizontally in the axial direction and place it on the sand core pressing device assembly (4). The concave groove of the walking track assembly (2) is fitted with at least two spaced mandrel support assemblies (6) for supporting the mandrels (8) during the assembly process. Each mandrel support assembly (6) can move freely along the axial direction in the concave groove and can move up and down and radially. The concave groove of the walking track assembly (2) is also fitted with a number of sand core support assemblies (5) for supporting sand cakes. Each sand core support assembly (5) can move freely along the axial direction in the concave groove and can move up and down and radially. The spindle support assembly (6) includes a spindle support block (6-1) for supporting the spindle (8). A first worm gear reducer (6-8) is provided at the lower end of the spindle support block (6-1). A first support mounting plate (6-6) is fixedly provided on the lower end face of the first worm gear reducer (6-8). A first servo motor (6-2) for driving the first worm gear reducer (6-8) to move up and down is fixedly provided on the upper surface of the first support mounting plate (6-6). Symmetrically arranged and radially extending components are provided on the lower surface of the first support mounting plate (6-6). The first adjusting linear guide assembly (6-5) has a first traveling mounting plate (6-7) slidably connected to its lower end. The lower end face of the first traveling mounting plate (6-7) is provided with a first linear traveling motor assembly (6-4) for driving the spindle support assembly (6) to move axially. The lower end face of the spindle support block (6-1) is provided with a reset sensor (6-3). When the spindle support block (6-1) moves up and down to the lower limit position, the reset sensor (6-3) provides a status signal to the electrical control assembly (9). The sand core support assembly (5) includes a sand core support block (5-1) for supporting the sand core. A second worm gear reducer (5-8) is provided at the lower end of the sand core support block (5-1). A second support mounting plate (5-6) is fixedly provided on the lower end face of the second worm gear reducer (5-8). A second servo motor (5-2) for driving the second worm gear reducer (5-8) to move up and down is fixedly provided on the upper surface of the second support mounting plate (5-6). A second servo motor (5-2) is provided on the lower surface of the second support mounting plate (5-6) and is symmetrically arranged and extends radially. The second adjustable linear guide assembly (5-5) has a second traveling mounting plate (5-7) slidably connected to its lower end. The lower end face of the second traveling mounting plate (5-7) is provided with a second linear traveling motor assembly (5-4) for driving the sand core support assembly (5) to move axially. The lower end face of the sand core support block (5-1) is provided with a limit proximity switch (5-3). When the sand core support block (5-1) moves up and down to the lower limit position, the limit proximity switch (5-3) provides a status signal to the electrical control assembly (9). The upper surface of the end of the walking track assembly (2) is provided with a shaft end fixing bracket (1), which is used to fix the end of the spindle (8); The rapid assembly equipment for sand core molds also includes an electrical control assembly (9) for implementing programmable control.

2. The rapid assembly equipment for sand core molds according to claim 1, characterized in that: The walking track assembly (2) includes a walking frame (2-1) with a concave cross-section. The upper surfaces of the concave sides of the walking frame (2-1) are respectively provided with driving racks (2-2) arranged along the axial direction and used to drive the sand core pressing device assembly (4) to move. The two sides inside the concave side of the walking frame (2-1) are respectively provided with linear guide rail assemblies (2-3) arranged along the axial direction and used to drive the spindle support assembly (6) and the sand core support assembly (5) to move.

3. The rapid assembly equipment for sand core molds according to claim 2, characterized in that: The sand core clamping device assembly (4) includes a traveling frame (4-1) mounted on a traveling track assembly (2). A traveling motor (4-4) is installed inside the traveling frame (4-1). The traveling motor (4-4) drives a traveling gear (4-5) mounted on the side of the traveling frame (4-1). Each traveling gear (4-5) travels along a corresponding driving rack (2-2). A clamping linear guide rail assembly (4-3) is symmetrically arranged and extends axially on the upper surface of the traveling frame (4-1). A clamping device is slidably connected to each of the clamping linear guide rail assemblies (4-3). Plate (4-2); a vertically arranged pressing frame (4-8) is fixed on the upper surface of the first end of each pressing plate (4-2); a pressing cylinder (4-7) is fixed on the traveling frame (4-1), the movable end of the pressing cylinder (4-7) is connected to the pressing frame (4-8), and pushes the pressing frame (4-8) and the pressing plate (4-2) to move axially along the pressing linear guide assembly (4-3); a saddle (4-6) for carrying sand cake is fixed on the upper surface of the end of each pressing plate (4-2), and a sensor (4-9) for detecting whether the sand cake is in place is provided below the saddle (4-6).

4. The rapid assembly equipment for sand core molds according to claim 3, characterized in that: The cantilever crane assembly (3) includes a rotatable hanger (3-1) fixed on the ground inside the factory building. The rotatable hanger (3-1) is connected to a hook (3-2) for hooking sand cakes. A winch motor (3-3) for controlling the movement of the hook (3-2) is fixed on the rotatable hanger (3-1).

5. The rapid assembly equipment for sand core molds according to claim 1, characterized in that: The shaft end fixing frame (1) includes a fixing frame (1-1) fixed on the upper surface of the end of the travel track assembly (2). The upper surface of the fixing frame (1-1) is chiseled with an arc-shaped groove. A shaft end fixing sleeve (1-2) is arranged symmetrically above the arc-shaped groove. The shaft end fixing sleeve (1-2) has fixing pieces (1-3) extending radially to both sides. The fixing pieces (1-3) are connected to the shaft end fixing frame (1) by bolts. The inner wall of the arc-shaped groove of the shaft end fixing sleeve (1-2) is inlaid with a semi-circular hard rubber pad (1-4) that matches the shaft diameter of the spindle (8).

6. The rapid assembly equipment for sand core molds according to claim 1, characterized in that: It also includes a mandrel tensioning assembly (7) for fixing the sand cake on the mandrel (8). The mandrel tensioning assembly (7) includes two semi-circular cones (7-1) sandwiched between the outer periphery of the mandrel (8) and the inner periphery of the sand cake and arranged symmetrically. Each semi-circular cone (7-1) has a flange (7-2) extending radially from its end. Each flange (7-2) extends to the outside of a metal bushing pre-embedded in the inner periphery of the sand cake. Each flange (7-2) is fixed to the corresponding metal bushing by screws.

7. A method for rapid assembly of sand core molds, applicable to the rapid assembly equipment for sand core molds as described in any one of claims 1 to 6, characterized in that, Includes the following steps: S1) First, the electrical control assembly (9) drives the first servo motor (6-2) on the spindle support assembly (6) near the shaft end fixing frame (1) through a preset program, raising the corresponding spindle support block (6-1) to a suitable height; the existing spindle (8) is hoisted to the top of the sand core mold quick assembly equipment, and then the end of the spindle (8) is lowered and placed in the arc groove of the fixing frame (1-1), and the other positions of the spindle (8) are lowered and placed on the upper end of the spindle support block (6-1). The end of the spindle (8) is clamped by the shaft end fixing sleeve (1-2) to complete the fixing of the spindle (8); the sand core mold is divided into several sections, each section is called a sand cake, the sand cake is numbered and marked as 1, 2, 3...N, and stacked around the sand cake flipping assembly (10) in the assembly order; S2) The No. 1 sand cake is hoisted to the top of the sand core pressing device assembly (4) by the cantilever crane assembly (3), and the No. 1 sand cake is placed on the saddle (4-6). After the No. 1 sand cake is placed stably, the No. 1 sand cake is assembled. S3) After the sensor (4-9) on the sand core pressing device assembly (4) detects the signal, it sends a hoisting command to the electrical control assembly (9). The electrical control assembly (9) controls the walking motor (4-4) on the sand core pressing device assembly (4) to run and drive the walking gear (4-5), so that the sand core pressing device assembly (4) carries the No. 1 sand cake and walks along the direction of the shaft end fixing frame (1). At this time, for sand cakes with different numbers, the electrical control assembly (9) drives the first servo motor (6-2) on the mandrel support assembly (6) near the shaft end fixing frame (1) through a preset program to realize the adjustment of the center height of the mandrel (8) during the assembly process, adapting to sand cakes of different diameters, so that the center hole of the No. 1 sand cake passes through the mandrel (8) and stops when it runs to the waiting area between the two mandrel support assemblies (6). S4) Start the first servo motor (6-2) on the spindle support assembly (6) away from the shaft end fixing frame (1) to make the corresponding spindle support block (6-1) rise and press against the spindle (8); then start the first servo motor (6-2) on the spindle support assembly (6) close to the shaft end fixing frame (1) to make the corresponding spindle support block (6-1) fall back to the lowest point position. At this time, the corresponding reset sensor (6-3) is triggered, indicating that the sand core clamping device assembly (4) can continue to move forward; S5) The sand core pressing device assembly (4) stops after bringing the No. 1 sand cake to the predetermined position on the mandrel (8). The mandrel tensioning assembly (7) is installed between the mandrel (8) and the center positioning hole of the No. 1 sand cake to lock the No. 1 sand cake on the mandrel (8) and complete the assembly of the No. 1 sand cake. S6) When the sand core clamping device assembly (4) returns to the waiting area between the two mandrel support assemblies (6), it pauses and starts the second servo motor (5-2) on the sand core support assembly (5) to raise the corresponding sand core support block (5-1) and support the installed No. 1 sand cake; start the first servo motor (6-2) on the mandrel support assembly (6) away from the shaft end fixing frame (1) to lower the corresponding mandrel support block (6-1) back to the lowest point position. At this time, the corresponding reset sensor (6-3) is triggered, indicating that the sand core clamping device assembly (4) can continue to return to the initial position. S7) Apply glue to the end face of sand cake No. 2 in advance, repeat steps S2)~S6) to complete the assembly of sand cake No. 2, and return the sand core pressing device assembly (4) to the initial position; S8) After all the sand cakes are installed, lock the head of the mandrel (8) to complete the assembly work and wait for transportation.

8. The rapid assembly method for sand core molds according to claim 7, characterized in that: Before hoisting the sand cake by the cantilever crane assembly (3) in S2), the end face of the sand cake should be cleaned of loose sand and the hoisting preparation work should be done in advance.

Images