A high-pressure water cutting device for removing sprue of magnesium alloy die casting

Abstract

The application relates to a high-pressure water cutting device for removing a sprue of a magnesium alloy die casting, which comprises a 'fang' shaped protective fence frame, an inlet and an outlet are arranged on the front side of the protective fence frame, a rectangular annular drainage ditch is formed on the ground inside the protective fence frame, a robot is arranged in the middle of the ground inside the drainage ditch, a water cutter and a flushing nozzle are respectively arranged at the tail end of a mechanical arm of the robot, the robot controls the cutting track of the water cutter, the flushing nozzle moves along the cutting track of the water cutter, and the cutting part is flushed; longitudinal travelling crane tracks are respectively arranged in the protective fence frames on the two sides of the robot, the travelling crane tracks are fixed on the ground and extend out of the inlet and the outlet of the protective fence frame; a carrying trolley is arranged on the travelling crane track, and a workpiece clamping table is fixedly connected to the carrying trolley. The high-pressure water cutting device adopts the robot to control the operation of the water cutter, the cutting is convenient and the precision is high; and a general die casting clamping table which is convenient and stable to clamp is designed.

Description

Technical Field

[0001] This invention relates to the technical field of waterjet cutting devices, and more specifically to a high-pressure waterjet cutting device for removing the gating system from magnesium alloy die-cast parts. Background Technology

[0002] Currently, waterjet cutting technology uses a booster to pressurize water to extremely high pressures, typically reaching hundreds of megapascals or even higher. This high-pressure water is then ejected from tiny nozzles (water jets), forming a high-speed water jet. Abrasive materials, such as garnet, can be added to the water to enhance cutting power. This high-speed water jet, or water jet containing abrasive, can cut various materials. Its principle is primarily based on using the kinetic energy of the water flow to disrupt the molecular structure of the material.

[0003] For large, integrated magnesium alloy die castings, traditional cutting methods may struggle to guarantee precision and efficiency. High-pressure water jet cutting, however, can remove the gating system with extremely high speed and precision, ensuring the casting remains undamaged. Its cutting accuracy can reach the millimeter level, meeting the stringent dimensional requirements of large die castings. High-pressure water jet cutting allows for precise cutting path planning based on the shape and location of the gating system, avoiding unnecessary damage to the casting. Furthermore, since no heat-affected zone is generated during the cutting process, it does not affect the performance and quality of the magnesium alloy die casting. High-pressure water jet cutting is suitable for removing gating systems of various shapes and sizes, easily handling straight, curved, or complex shapes. For large, integrated magnesium alloy die castings, the gating system shape is often complex, which traditional cutting methods may struggle to address, while high-pressure water jet cutting fully leverages its advantages; therefore, a water jet cutting device specifically designed for large, integrated magnesium alloy die castings is needed.

[0004] Moreover, the current integrated magnesium alloy die castings have a relatively complex structure with many structural surfaces on their upper and lower surfaces. Furthermore, different magnesium alloy die castings have different shapes and structures. Therefore, the water-to-water cutting device needs to be designed with a clamping structure that is easy to clamp and requires good clamping stability so as not to interfere with the water cutting trajectory. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a high-pressure water jet cutting device for removing the gating system from magnesium alloy die castings. This device uses a robot to control the operation of the water jet, making cutting convenient and highly accurate. It is also designed with a corresponding universal die casting clamping table that is convenient and stable for clamping.

[0006] A high-pressure water cutting device for removing the runner of a magnesium alloy die-casting part, including a "C"-shaped protective fence frame. There is an inlet and outlet on the front side of the protective fence frame. A rectangular ring-shaped drainage ditch is formed on the ground inside the protective fence frame. In the middle of the ground inside the drainage ditch, there is a robot. At the ends of the robotic arms on the robot, a water knife and a flushing nozzle are respectively installed and connected. Longitudinal traveling tracks are respectively arranged inside the protective fence frame on both sides of the robot. The traveling tracks are fixed on the ground and extend out of the inlet and outlet of the protective fence frame;

[0007] The workpiece clamping table includes a rectangular bottom plate. A rectangular positioning frame is fixedly connected to the bottom plate. A rectangular lifting frame is sleeved on the upper part of the positioning frame. On the left and right side walls at the upper end of the lifting frame, support plates are respectively formed. A number of longitudinally distributed pressing arms are arranged on the support plates. Pressing execution mechanisms are respectively arranged on the left and right sides of the lifting frame. The pressing execution mechanism includes a number of vertical pressing cylinders. The pressing cylinders are fixedly connected to the positioning side plates. The piston rods of the pressing cylinders pass through the positioning side plates and are respectively fixedly connected to the support plates of the lifting frame. The positioning side plates are respectively fixedly connected to the outer side walls on the left and right sides of the positioning frame;

[0008] A number of array-distributed support column assemblies are arranged inside the positioning frame. The support column assembly includes a vertical and cylindrical ejector column. A vertical positioning column is inserted at the lower end of the ejector column. A guide column sleeve with a D-shaped cross-section is inserted at the lower end of the positioning column. The lower end of the guide column sleeve is fixedly connected to the bottom plate. A vertical guide groove is formed on the outer wall on one side of the plane of the guide column sleeve. A horizontal stud is formed at the lower end of the positioning column. The stud passes through the guide groove of the guide column sleeve and is screwed with an inclined connecting rod. The upper end of the connecting rod is inserted with a T-shaped pin shaft. The pin shaft is inserted and fixed on a horizontal and longitudinal linkage rod; A number of vertical avoidance grooves are formed on the front end face of the positioning frame. The front end of the linkage rod extends out of the avoidance groove of the positioning frame and is inserted and fixed with a cross shaft. A number of locking components opposite to the cross shaft are fixedly connected to the front end face of the positioning frame; A repulsive upper magnet block and a lower magnet block are inserted inside the guide column sleeve. The lower magnet block abuts against the bottom plate. The upper magnet block is fixedly connected to the lower end face of the positioning column;

[0009] The locking component includes a "C"-shaped locking seat sleeved on the cross shaft. A locking plate is inserted inside the locking seat on the front side of the cross shaft. Longitudinal guide rods are inserted at the upper and lower ends of the locking plate. The guide rods are inserted on the locking seat. A longitudinal locking bolt is screwed in the middle of the locking seat. The end of the locking bolt abuts against the locking plate.

[0010] Partition plates are respectively fixedly connected to the ground on the front and rear sides of the robot. Gate railings are respectively arranged inside the inlet and outlet of the protective fence frame on both sides of the partition plates.

[0011] Preferably, a number of longitudinal installation slot holes are formed on both sides of the bottom plate. Screws are inserted into the installation slot holes. The bottom plate is fixedly connected to the carrier trolley through the screws.

[0012] Preferably, the outer side walls of each side of the positioning frame are flush with the inner side walls of the lifting frame, and drainage grooves penetrating the lower end face of the positioning frame are formed on the outer side walls of the left and right sides of the positioning frame.

[0013] Preferably, the pressing arm includes a horizontal arm rod, one end of which is inserted with a positioning bolt, which is screwed onto a support plate, and the other end of the arm rod is located directly above the positioning frame and is screwed with a vertical pressing bolt.

[0014] Preferably, the front end of the connecting rod on the support column assembly is higher than the lower end of the connecting rod, and the stud is screwed to the lower end of the connecting rod;

[0015] The lower end face of the top post is formed with an insertion hole opposite to the positioning post, and the length of the top post is not less than the length of the positioning post.

[0016] Preferably, a horizontal rectangular auxiliary plate is inserted in the middle and upper part of the positioning frame, and a number of positioning holes are arranged in an array on the auxiliary plate. The top material column is inserted into the positioning hole respectively. A rectangular ring-shaped baffle is fixed to the lower end face of the auxiliary plate and the baffle is fixed to the inner side wall of the positioning frame.

[0017] The auxiliary plate is provided with several vertical limiting posts.

[0018] Preferably, the upper end of the limiting post is located below the upper end of the top material post, and the lower end of the limiting post is screwed onto the auxiliary plate.

[0019] The beneficial effects of this invention are as follows:

[0020] This high-pressure water jet cutting device uses a robot to control the operation of the water jet, making cutting convenient and highly accurate; it is also designed with a corresponding universal die-casting clamping table that is convenient and stable for clamping. Attached Figure Description

[0021] Figure 1 This is a top view of the structure of the present invention;

[0022] Figure 2 This is a three-dimensional structural diagram of the workpiece clamping stage of the present invention;

[0023] Figure 3 This is a front view of the workpiece clamping stage of the present invention.

[0024] Figure 4 for Figure 3 A schematic cross-sectional view of the structure at point A-A;

[0025] Figure 5 for Figure 3 A schematic cross-sectional view of the structure at point B-B;

[0026] Figure 6This is a schematic side view structure diagram of the workpiece clamping table in the present invention.

[0027] In the figure: 1, protective fence frame; 2, drainage ditch; 3, robot; 4, water jet cutter; 5, flushing nozzle; 6, traveling crane track; 7, carrier trolley; 8, workpiece clamping table; 9, barrier railing; 10, partition board. Specific implementation mode

[0028] Example: As shown in Figures 1 to 6 In the figure, a high-pressure water cutting device for removing the runner of a magnesium alloy die-casting includes a "C"-shaped protective fence frame 1. There is an inlet and outlet on the front side of the protective fence frame 1. A rectangular ring-shaped drainage ditch 2 is formed on the ground inside the protective fence frame 1. In the middle of the ground inside the drainage ditch 2, a robot 3 is arranged. The ends of the robotic arms on the robot 3 are respectively installed and connected with a water jet cutter 4 and a flushing nozzle 5. The robot 3 controls the cutting trajectory of the water jet cutter 4. At the same time, the flushing nozzle 5 moves along the cutting trajectory of the water jet cutter 4 to flush the cutting part; Longitudinal traveling crane tracks 6 are respectively arranged inside the protective fence frames 1 on both sides of the robot 3. The traveling crane tracks 6 are fixed on the ground and extend out of the inlet and outlet of the protective fence frame 1; A carrier trolley 7 is arranged on the traveling crane track 6, and a workpiece clamping table 8 is fixedly connected to the carrier trolley 7;

[0029] The workpiece clamping table 8 includes a rectangular bottom plate 81. A rectangular positioning frame 82 is fixedly connected to the bottom plate 81. A rectangular lifting frame 83 is sleeved on the upper part of the positioning frame 82. Support plates 831 are respectively formed on the left and right side walls at the upper end of the lifting frame 83. A number of longitudinally distributed pressing arms 84 are arranged on the support plates 831. Pressing execution mechanisms 85 are respectively arranged on the left and right sides of the lifting frame 83. The pressing execution mechanism 85 includes a number of vertical pressing cylinders 851. The pressing cylinders 851 are fixedly connected to the positioning side plates 852. The piston rods of the pressing cylinders 851 pass through the positioning side plates 852 and are respectively fixedly connected to the support plates 831 of the lifting frame 83. The positioning side plates 852 are respectively fixedly connected to the outer side walls on the left and right sides of the positioning frame 82;

[0030] The positioning frame 82 has a number of support column assemblies 86 distributed in an array. The support column assembly 86 includes a vertical and cylindrical blanking column 861. A vertical positioning column 862 is inserted at the lower end of the blanking column 861. A guide column sleeve 863 with a D-shaped cross-section is inserted at the lower end of the positioning column 862. The lower end of the guide column sleeve 863 is fixedly connected to the bottom plate 81. A vertical guide groove 8631 is formed on the outer wall of one side of the plane of the guide column sleeve 863. A horizontal stud 8621 is formed at the lower end of the positioning column 862. The stud 8621 passes through the guide groove 8631 of the guide column sleeve 863 and is screwed with an inclined connecting rod 864. The upper end of the connecting rod 864 is inserted with a T-shaped pin shaft 865. The pin shaft 865 is inserted and fixed in a horizontal and longitudinal linkage rod 866. A number of vertical avoidance grooves 822 are formed on the front end face of the positioning frame 82. The front end of the linkage rod 866 extends out of the avoidance groove 822 of the positioning frame 82 and is inserted and fixed with a cross shaft 867. A number of locking assemblies 88 opposite to the cross shaft 867 are fixedly connected to the front end face of the positioning frame 82. A repulsive upper magnet block 868 and a lower magnet block 869 are inserted in the guide column sleeve 863. The lower magnet block 869 abuts against the bottom plate 81. The upper magnet block 868 is fixedly connected to the lower end face of the positioning column 862. Both the lower magnet block 869 and the upper magnet block 868 are made of strong magnets, such as neodymium iron boron magnets.

[0031] The locking assembly 88 includes a locking seat 881 sleeved on the cross shaft 867 and in a "C" shape. A locking plate 882 is inserted in the locking seat 881 on the front side of the cross shaft 867. Longitudinal guide rods 883 are inserted at the upper and lower ends of the locking plate 882. The guide rods 883 are inserted in the locking seat 881. A longitudinal locking bolt 884 is screwed in the middle of the locking seat 881. The end of the locking bolt 884 abuts against the locking plate 882. The locking bolt 884 will drive the locking plate 882 to move backward. Further, the locking plate 882 will带动横轴867和联动杆866后移,实现连杆864转动,连杆864转动会夹持固定在导向柱套863上,实现对定位柱862的定位。

[0032] Partition plates 10 are fixedly connected to the ground on the front and rear sides of the robot 3 respectively. The height of the partition plates 10 is equal to the height of the robotic arm on the robot 3, while the protective fence frame 1 needs to be higher than the height of the robotic arm on the robot 3.

[0033] Barrier gates 9 are respectively arranged at the entrances and exits of the protective fence frame 1 on both sides of the partition plate 10. When the carrier trolley 7 enters and exits the protective fence frame 1, the barrier gates 9 can be opened, but prevent personnel from entering the protective fence frame 1. Robotic arm

[0034] The base plate 81 has several longitudinal mounting slots 811 formed on both sides. Screws are inserted into the mounting slots 811, and the base plate 81 is fixed to the transport trolley 7 by the screws. The transport trolley 7 can move automatically on the vehicle track 6, but the travel distance is set, that is, the position of the transport trolley 7 at the front and rear ends of the vehicle track 6 is fixed.

[0035] The outer side walls of each side of the positioning frame 82 are flush with the inner side walls of the lifting frame 83. Drainage grooves 821 are formed on the outer side walls of the left and right sides of the positioning frame 82, penetrating the lower end face of the positioning frame 82. Cutting chips and water generated during cutting can be discharged from the drainage grooves 821.

[0036] The press-fit arm 84 includes a horizontal arm 841. One end of the arm 841 is inserted with a positioning bolt 842, which is screwed onto the support plate 831. The other end of the arm 841 is located directly above the positioning frame 82 and is screwed with a vertical pressing bolt 843. The arm 841 can rotate. At the same time, because the upper surface of the die-cast workpiece is not flat, the pressing bolt 843 can adjust the height of the pressing point.

[0037] The front end of the connecting rod 864 on the support column assembly 86 is higher than the lower end of the connecting rod 864, and the stud 8621 is screwed to the lower end of the connecting rod 864.

[0038] The lower end face of the top post 861 is formed with an insertion hole opposite to the positioning post 862. The length of the top post 861 is not less than the length of the positioning post 862, and the top post 861 can be pulled off the positioning post 862.

[0039] A horizontal rectangular auxiliary plate 89 is inserted into the middle and upper part of the positioning frame 82. A plurality of positioning holes 891 are arranged in an array on the auxiliary plate 89. The top material column 861 is inserted into the positioning holes 891 respectively. A rectangular annular baffle 810 is fixedly connected to the lower end face of the auxiliary plate 89. The baffle 810 is fixedly connected to the inner side wall of the positioning frame 82. The auxiliary plate 89 can constrain the top material column 861 and reduce the bending of the top material column 861.

[0040] The auxiliary plate 89 is provided with several vertical limiting posts 87, which limit the downward movement height of the die-cast workpiece.

[0041] The upper end of the limiting post 87 is located below the upper end of the top post 861, and the lower end of the limiting post 87 is screwed onto the auxiliary plate 89. The limiting post 87 can be detached from the auxiliary plate 89 to avoid interfering with the cutting trajectory of the water jet high-pressure water jet.

[0042] Working principle: This structure is a high-pressure water jet cutting device for removing the gating system from magnesium alloy die-cast parts. The high-pressure water jet cutting device has two innovative features.

[0043] One innovation is that the water jet 4 is mounted on the robot 3, with two cutting stations on both sides of the robot 3. The robot 3 can perform independent cutting at the two cutting stations, which can improve the efficiency of water jet cutting. Moreover, the cutting stations are equipped with safe and reliable protective measures.

[0044] Another innovation is the workpiece clamping table 8 for loading large integrated magnesium alloy die castings. The large integrated magnesium alloy die casting is first placed in the support column assembly 86 in the positioning frame 82. The corresponding position of the pressing arm 84 is adjusted, and the pressing cylinder 851 is activated to adjust the pressing arm 84 to move down and press the large integrated magnesium alloy die casting. At the same time, the top column 861 on the support column assembly 86 provides elastic support to the lower surface of the large integrated magnesium alloy die casting. Then, by adjusting the locking assembly 88, the connecting rod 864 in the support column assembly 86 is clamped and fixed on the guide column sleeve 863, so that the elastic support of the top column 861 changes to a fixed support.

[0045] Next, the press cylinder 851 is reset, and the large integrated magnesium alloy die casting is taken out from the positioning frame 82. The top material column 861 that coincides with or interferes with the water jet cutting trajectory is removed to avoid water jet cutting damaging the top material column 861. Then, the large integrated magnesium alloy die casting is clamped. At the same time, the positioning and clamping of the next large integrated magnesium alloy die casting of the same specification can be completed quickly.

[0046] The embodiments described are illustrative of the invention and are not intended to limit the invention. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the invention; therefore, the scope of protection of the invention should be as set forth in the claims.

Claims

1. A high-pressure water cutting device for removing the runner of a magnesium alloy die-casting part, comprising a "C"-shaped guardrail frame (1). There is an inlet and outlet on the front side of the guardrail frame (1). A rectangular ring-shaped drainage ditch (2) is formed on the ground inside the guardrail frame (1). It is characterized in that: A robot (3) is installed in the middle of the ground inside the drainage ditch (2). A water jet (4) and a flushing nozzle (5) are respectively installed and connected to the end of the robotic arm on the robot (3). Longitudinal carriage tracks (6) are respectively provided in the guardrail frames (1) on both sides of the robot (3). The carriage tracks (6) are fixed on the ground and extend out of the entrance and exit of the guardrail frames (1). A transport trolley (7) is provided on the carriage track (6). A workpiece clamping table (8) is fixed on the transport trolley (7). The workpiece clamping table (8) includes a rectangular base plate (81), a rectangular positioning frame (82) is fixed on the base plate (81), a rectangular lifting frame (83) is fitted on the upper part of the positioning frame (82), support plates (831) are formed on the left and right side walls of the upper end of the lifting frame (83), a number of longitudinally distributed pressing arms (84) are provided on the support plates (831), and pressing actuators (85) are provided on the left and right sides of the lifting frame (83). The pressing actuators (85) include a number of vertical pressing cylinders (851), the pressing cylinders (851) are fixed on the positioning side plate (852), the piston rod of the pressing cylinder (851) passes through the positioning side plate (852) and is fixed on the support plate (831) of the lifting frame (83), and the positioning side plate (852) is fixed on the outer side wall of the left and right sides of the positioning frame (82). The positioning frame (82) is provided with a plurality of arrayed support column assemblies (86). The support column assembly (86) includes a vertical cylindrical top column (861). A vertical positioning column (862) is inserted into the lower end of the top column (861). A D-shaped guide column sleeve (863) is inserted into the lower end of the positioning column (862). The lower end of the guide column sleeve (863) is fixed to the base plate (81). A vertical guide groove (8631) is formed on the outer wall of one side of the plane of the guide column sleeve (863). A horizontal stud (8621) is formed at the lower end of the positioning column (862). The stud (8621) passes through the guide groove (8631) of the guide column sleeve (863) and is screwed to an obliquely placed connecting rod (864). A T-shaped pin (865) is inserted into the upper end of (864), and the pin (865) is inserted and fixed to the horizontal longitudinal linkage rod (866); several vertical clearance grooves (822) are formed on the front end face of the positioning frame (82), and the front end of the linkage rod (866) extends out of the clearance groove (822) of the positioning frame (82) and is inserted and fixed to the horizontal shaft (867). Several locking components (88) opposite to the horizontal shaft (867) are fixed on the front end face of the positioning frame (82); the guide post sleeve (863) is filled with an upper magnet block (868) and a lower magnet block (869) that repel each other. The lower magnet block (869) abuts against the base plate (81), and the upper magnet block (868) is fixed to the lower end face of the positioning post (862); The locking component (88) includes a locking seat (881) sleeved on the horizontal shaft (867) and in a "C" shape. A locking plate (882) is inserted into the locking seat (881) on the front side of the horizontal shaft (867). Vertical guide rods (883) are inserted into the upper and lower ends of the locking plate (882). The guide rods (883) are inserted into the locking seat (881). A vertical locking bolt (884) is screwed in the middle of the locking seat (881), and the end of the locking bolt (884) abuts against the locking plate (882).

2. The high-pressure water jet cutting device for removing the gating system from magnesium alloy die-casting parts according to claim 1, characterized in that: Partition boards (10) are fixedly connected to the ground on the front and rear sides of the robot (3) respectively. Gate bars (9) are respectively arranged at the entrances and exits of the guardrail frames (1) on both sides of the partition boards (10).

3. The high-pressure water jet cutting device for removing the gating system from magnesium alloy die-casting parts according to claim 1, characterized in that: A number of vertical mounting slots (811) are formed on both sides of the bottom plate (81). Screws are inserted into the mounting slots (811), and the bottom plate (81) is fixedly connected to the carrier cart (7) by the screws.

4. The high-pressure water jet cutting device for removing the gating system from magnesium alloy die-casting parts according to claim 1, characterized in that: The outer side walls on each side of the positioning frame (82) are flush with the inner side walls of the lifting frame (83). Drainage grooves (821) penetrating the lower end surface of the positioning frame (82) are formed on the outer side walls on the left and right sides of the positioning frame (82).

5. The high-pressure water jet cutting device for removing the gating system from magnesium alloy die-cast parts according to claim 1, characterized in that: The press-fitting arm (84) includes a horizontal arm rod (841). A positioning bolt (842) is inserted into one end of the arm rod (841). The positioning bolt (842) is screwed on the support plate (831). The other end of the arm rod (841) is located directly above the positioning frame (82) and a vertical pressing bolt (843) is screwed thereon.

6. The high-pressure water jet cutting device for removing the gating system from magnesium alloy die-cast parts according to claim 1, characterized in that: The front end of the upper connecting rod (864) of the support column assembly (86) is higher than the lower end of the connecting rod (864). The stud (8621) is screwed on the lower end of the connecting rod (864). A jack hole opposite to the positioning column (862) is formed on the lower end surface of the ejector post (861). The length of the ejector post (861) is not less than the length of the positioning column (862).

7. The high-pressure water jet cutting device for removing the gating system from magnesium alloy die-cast parts according to claim 1, characterized in that: A horizontal rectangular auxiliary plate (89) is inserted into the middle and upper parts of the positioning frame (82). A number of positioning holes (891) are arranged in an array on the auxiliary plate (89). The ejector posts (861) are respectively inserted into the positioning holes (891). A rectangular ring-shaped retaining frame (810) is fixedly connected to the lower end surface of the auxiliary plate (89). The retaining frame (810) is fixedly connected to the inner side wall of the positioning frame (82). A number of vertical limiting columns (87) are arranged on the auxiliary plate (89).

8. The high-pressure water jet cutting device for removing the gating system from magnesium alloy die-cast parts according to claim 7, characterized in that: The upper ends of the limiting columns (87) are located below the upper ends of the ejector posts (861). The lower ends of the limiting columns (87) are screwed on the auxiliary plate (89).

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