A servo-driven die-casting machine

Abstract

The present invention discloses a servo-driven die-casting machine, belonging to the field of metal casting, including a machine tool. On the upper surface of the machine tool, a base, a first bracket, a support, and a second bracket are fixedly arranged in sequence from left to right. The top of the first bracket is rotatably connected to a first injection pressure pipe. The left end of the first injection pressure pipe is integrally formed with an injection pipe. The outer surface of the injection pipe is rotatably connected to a fixed valve. Through the setting of a servo motor and a series of transmission mechanisms, such as the coordinated action of a crank, a connecting rod, a helical gear, an incomplete gear, etc., the present invention can precisely control the movement of the first piston and the second piston, as well as the rotation and communication state of the first injection pressure pipe and the second injection pressure pipe, so as to achieve precise control of the injection amount, injection speed, and injection time of the molten metal. Through the cooperative design of the injection pipe and the fixed valve, the first injection pressure pipe and the inside of the fixed mold can be intermittently communicated, effectively avoiding the occurrence of backflow and pressure relief of the molten metal inside the fixed mold and the movable mold during the die-casting process.

Description

Technical Field

[0001] The present invention relates to the technical field of metal casting, and particularly to a servo-driven die casting machine. Background Art

[0002] A servo-driven die casting machine is an advanced die casting equipment, mainly used for injecting molten metal liquid into a mold, and obtaining the required die-cast parts after cooling and forming.

[0003] Traditional die casting machines mostly adopt pneumatic or hydraulic drive methods, with relatively low control precision, and it is difficult to achieve precise control of the process of injecting molten metal, resulting in unstable product quality and poor consistency.

[0004] It is impossible to effectively avoid the backflow and pressure relief of molten metal, affecting die casting quality and production efficiency; and the feeding and injection systems are relatively complex, and the coordination between components is poor, resulting in slow extraction and injection speeds of molten metal and low production efficiency. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a servo-driven die casting machine, which solves the problems raised in the above background art.

[0006] Technical Solution: To solve the above technical problems, according to one aspect of the present invention, more specifically, a servo-driven die casting machine includes a machine tool. On the upper surface of the machine tool, a base, a first bracket, a support, and a second bracket are fixedly arranged in sequence from left to right. The top of the first bracket is rotatably connected to a first injection pressure pipe. The left end of the first injection pressure pipe is integrally formed with an injection pipe. The outer surface of the injection pipe is rotatably connected to a fixed valve. The left side of the fixed valve is communicated with a fixed mold. An active mold is arranged on the left side of the fixed mold. The upper surface of the first injection pressure pipe is communicated with a second injection pressure pipe. Both the front and rear surfaces of the outer surface of the second injection pressure pipe are communicated with a first material pipe. The opposite ends of the two first material pipes are both communicated with a second material pipe. The right ends of the two second material pipes are jointly connected to a third material pipe. A first piston is movably connected inside the first injection pressure pipe. The right end of the first piston is fixedly connected to a first fixed rod. The first fixed rod is located on the right side of the first injection pressure pipe and is rotatably connected to a connecting rod. The right end of the connecting rod is rotatably connected to a crank. The rear surface of the outer surface of the crank is rotatably connected to an L-shaped frame. The L-shaped frame is fixedly connected to the rear surface of the support. A turntable is fixed to the rear end of the crank. A servo motor is fixed to the rear surface of the turntable;

[0007] The front end of the output shaft of the servo motor is fixedly connected to the rear end of the crank. A first helical gear is fixedly installed at the front end of the crank. A second helical gear is meshed and connected to the bottom of the first helical gear. Two third helical gears are symmetrically and fixedly installed on the outer surface of the first injection pipe. An incomplete gear is arranged between the two third helical gears below the first injection pipe. Transmission wheels are fixedly installed at the bottoms of the incomplete gear and the second helical gear respectively. A transmission belt is jointly arranged on the outer surfaces of the two transmission wheels. A second piston is slidably connected inside the second injection pipe. A second fixing rod is fixedly installed at the top of the second piston. Two fixing rings are fixedly installed inside the base. Guide grooves are respectively formed on the opposite sides of the two fixing rings. A guide rod is slidably connected inside the two guide grooves jointly. The outer surface of the guide rod is fixedly connected to the top of the second fixing rod.

[0008] Furthermore, an injection port is formed through the left end of the injection pipe. A valve port is formed through the inside of the fixed valve. The valve port is communicated with the injection port.

[0009] Furthermore, the third material pipe is rotatably connected inside the second support. The right end of the third material pipe penetrates to the right side of the second support and is rotatably connected with an adapter pipe. The adapter pipe is fixedly connected to the second support. The third material pipe, the first injection pipe and the two fixing rings are coaxial.

[0010] Furthermore, the guide groove is a wavy groove formed by connecting a plurality of arc grooves.

[0011] Furthermore, the incomplete gear and the second helical gear are drivingly connected through the two transmission wheels and the transmission belt.

[0012] Furthermore, the incomplete gear is adapted to the two third helical gears.

[0013] Furthermore, the third material pipe is connected to an external heat preservation furnace through the adapter pipe. The movable mold is driven by an external mold closing device.

[0014] Furthermore, the fixing ring is of an annular structure. The outer surface of the first piston is attached to the inner surface of the first injection pipe. The outer surface of the second piston is attached to the inner surface of the second injection pipe.

[0015] The beneficial effects of a servo-driven die casting machine of the present invention are as follows:

[0016] (1). By arranging a servo motor and a series of transmission mechanisms, such as the coordinated action of a crank, a connecting rod, a helical gear, an incomplete gear, etc., the present invention can accurately control the movement of the first piston and the second piston, as well as the rotation and communication states of the first injection pipe and the second injection pipe, so as to realize the precise control of the injection amount, injection speed and injection time of the molten metal, and improve the product quality and consistency;

[0017] Through the cooperative design of the injection pipe and the fixed valve, the first injection pressure pipe can be intermittently communicated with the inside of the fixed mold, effectively avoiding the backflow and pressure relief of the molten metal inside the fixed mold and the movable mold during the die-casting process, and improving the stability and reliability of the die-casting process.

[0018] (2) When the first injection pressure pipe is separated from the inside of the fixed mold in the present invention, the second injection pressure pipe is communicated with the first material pipe. At this time, when the first piston slides to the right, a negative pressure will be generated in the injection pressure pipe, and the molten metal is extracted from the external holding furnace through the first material pipe, the second material pipe, and the third material pipe. This process utilizes the pressure difference generated by the piston movement to achieve the automatic material suction function, and can quickly and efficiently complete the extraction and injection process of the molten metal, improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below with reference to the drawings and specific implementation methods.

[0020] Figure 1 is a schematic structural diagram of the present invention;

[0021] Figure 2 is a schematic cross-sectional structural diagram of the present invention;

[0022] Figure 3 is a schematic structural diagram of the machine tool in the present invention;

[0023] Figure 4 is a schematic structural diagram of the first injection pressure pipe and the second injection pressure pipe in the present invention;

[0024] Figure 5 For the present invention Figure 4 is a schematic left view structural diagram;

[0025] Figure 6 For the present invention Figure 4 is a schematic partial cross-sectional structural diagram;

[0026] Figure 7 is a schematic left view structural diagram of the fixed ring and the first injection pressure pipe in the present invention.

[0027] In the figure: 1. Machine tool; 2. Base; 3. First bracket; 4. Support; 5. Second bracket; 6. First injection pressure pipe; 7. Injection pipe; 71. Injection port; 8. Fixed valve; 81. Valve port; 9. Fixed mold; 10. Movable mold; 11. Second injection pressure pipe; 12. First material pipe; 13. Second material pipe; 14. Third material pipe; 15. Adapter; 16. First piston; 17. First fixed rod; 18. Connecting rod; 19. Crank; 20. Turntable; 21. Servo motor; 22. First helical gear; 23. Second helical gear; 24. Third helical gear; 25. Incomplete gear; 26. Driving wheel; 27. Transmission belt; 28. Second piston; 29. Second fixed rod; 30. Fixed ring; 31. Guide groove; 32. Guide rod; 33. L-shaped bracket. Detailed Embodiments

[0028] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0029] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Referring to Figures 1-7 , a servo-driven die-casting machine includes a machine tool 1. On the upper surface of the machine tool 1, a base 2, a first bracket 3, a support 4, and a second bracket 5 are fixedly arranged in sequence from left to right. The top of the first bracket 3 is rotatably connected to a first injection pressure pipe 6. The left end of the first injection pressure pipe 6 is integrally formed with an injection pipe 7. The outer surface of the injection pipe 7 is rotatably connected to a fixed valve 8. The left side of the fixed valve 8 is communicated with a fixed mold 9. A movable mold 10 is arranged on the left side of the fixed mold 9. The movable mold 10 is driven by an external mold clamping device, and the mold clamping device controls the movement of the movable mold 10. Above the outer surface of the first injection pressure pipe 6, a second injection pressure pipe 11 is communicated. The front and rear sides of the outer surface of the second injection pressure pipe 11 are both communicated with a first material pipe 12. The opposite ends of the two first material pipes 12 are both communicated with a second material pipe 13. The right ends of the two second material pipes 13 are jointly connected to a third material pipe 14. A first piston 16 is movably connected inside the first injection pressure pipe 6. The right end of the first piston 16 is fixedly connected to a first fixed rod 17. The first fixed rod 17 is located on the right side of the first injection pressure pipe 6 and is rotatably connected to a connecting rod 18. The right end of the connecting rod 18 is rotatably connected to a crank 19. The rear surface of the outer surface of the crank 19 is rotatably connected to an L-shaped frame 33. The L-shaped frame 33 is fixedly connected to the rear surface of the support 4. A turntable 20 is fixed to the rear end of the crank 19. A servo motor 21 is fixed to the rear surface of the turntable 20;

[0031] The front end of the output shaft of the servo motor 21 is fixedly connected to the rear end of the crank 19. A first helical gear 22 is fixed to the front end of the crank 19. The bottom of the first helical gear 22 is meshed and connected with a second helical gear 23. Two third helical gears 24 are symmetrically fixed to the outer surface of the first injection pressure pipe 6. An incomplete gear 25 is arranged between the two third helical gears 24 below the first injection pressure pipe 6. Transmission wheels 26 are fixed to the bottoms of the incomplete gear 25 and the second helical gear 23 respectively. A transmission belt 27 is jointly arranged on the outer surfaces of the two transmission wheels 26. A second piston 28 is slidably connected inside the second injection pressure pipe 11. The top of the second piston 28 is fixedly connected to a second fixed rod 29. Two fixed rings 30 are fixedly arranged inside the base 2. Guide grooves 31 are opened on the opposite sides of the two fixed rings 30. A guide rod 32 is jointly slidably connected inside the two guide grooves 31. The outer surface of the guide rod 32 is fixedly connected to the top of the second fixed rod 29;

[0032] During die casting, the servo motor 21 operates to drive the crank 19 to rotate. The rotation of the crank 19 pushes and pulls the fixed rod one 17 and the piston one 16 through the connecting rod 18, causing the piston one 16 to slide left and right. At the same time, under the sequential transmission of the helical gear one 22, the helical gear two 23, the transmission wheel 26, and the transmission belt 27, the incomplete gear 25 rotates. The continuous rotation of the incomplete gear 25 will intermittently mesh and drive with the two helical gears three 24 in sequence. Under the drive of the two helical gears three 24, the injection pressure pipe one 6 rotates axially in a reciprocating manner in the positive and negative directions. The injection pipe 7 rotates accordingly, and under the blockage of the fixed valve 8, the injection pressure pipe one 6 is intermittently communicated with the inside of the fixed mold 9. At the same time, the injection pressure pipe one 6 drives the injection pressure pipe two 11, the fixed rod two 29, and the guide rod 32 to swing accordingly. When the guide rod 32 slides inside the wavy guide groove 31, it will drive the piston two 28 to reciprocate inside the injection pressure pipe two 11 through the fixed rod two 29, causing the inside of the material pipe one 12 to be intermittently communicated with the inside of the injection pressure pipe two 11; when the injection pressure pipe one 6 is separated from the inside of the fixed mold 9, the injection pressure pipe two 11 is communicated with the material pipe one 12. At this time, the piston one 16 slides to the right, causing negative pressure inside the injection pressure pipe, and then sequentially extracting the molten metal in the heat preservation furnace through the material pipe one 12, the material pipe two 13, and the material pipe three 14. Subsequently, when the piston one 16 slides to the left, the piston two 28 slides to block the material pipe one 12, and the inside of the injection pressure pipe one 6 is communicated with the inside of the fixed mold 9. Under the push of the piston one 16, the molten liquid is injected into the inside of the fixed mold 9. Thus, after repeated operations of feeding and pressurizing, it waits for cooling and forming.

[0033] Refer to Figures 2-4 , an injection port 71 is penetrated and opened at the left end of the injection pipe 7, and a valve port 81 is penetrated and opened inside the fixed valve 8. The valve port 81 is communicated with the injection port 71. When the injection pressure pipe one 6 drives the injection pipe 7 to rotate, the injection port 71 rotates and intersects with the valve port 81, blocking the inside of the injection pressure pipe one 6 from the inside of the fixed mold 9, thereby avoiding the reverse flow and pressure relief of the molten metal inside the fixed mold 9 and the movable mold 10.

[0034] Refer to Figure 2 , the material pipe three 14 is rotatably connected to the inside of the support two 5. The right end of the material pipe three 14 penetrates to the right side of the support two 5 and is rotatably connected with a transfer pipe 15. The transfer pipe 15 is fixedly connected to the support two 5. The material pipe three 14, the injection pressure pipe one 6, and the two fixing rings 30 are coaxial. The material pipe three 14 is connected to the external heat preservation furnace through the transfer pipe 15; when the injection pressure pipe one 6 rotates, it will drive the material pipe one 12, the material pipe two 13, and the material pipe three 14 on both sides to rotate synchronously, and maintain the connection with the external heat preservation furnace under the connection of the transfer pipe 15 to ensure the supply of molten metal.

[0035] Refer to Figures 6-7 , the guide groove 31 is a wavy groove composed of multiple arc grooves connected. The incomplete gear 25 and the helical gear two 23 are connected by two transmission wheels 26 and a transmission belt 27.

[0036] Refer toFigure 6 , the incomplete gear 25 is adapted to the two helical gears 24 and intermittently meshes to achieve reciprocating swing.

[0037] Refer to Figures 2-6 , the fixing ring 30 is a circular ring structure, the outer surface of the first piston 16 is fitted to the inner surface of the first injection pressure pipe 6, and the outer surface of the second piston 28 is fitted to the inner surface of the second injection pressure pipe 11.

[0038] The above embodiments only represent several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the appended claims.

Claims

1. A servo-driven die casting machine, comprising a machine tool (1), characterized in that: On the upper surface of the machine tool (1), a base (2), a first bracket (3), a support (4), and a second bracket (5) are successively fixed from left to right. At the top of the first bracket (3), a first injection pressure pipe (6) is rotatably connected. At the left end of the first injection pressure pipe (6), an injection pipe (7) is integrally formed. A fixed valve (8) is rotatably connected to the outer surface of the injection pipe (7). A fixed mold (9) is communicated with the left side of the fixed valve (8). A movable mold (10) is arranged on the left side of the fixed mold (9). A second injection pressure pipe (11) is communicated with the upper part of the outer surface of the first injection pressure pipe (6). Feeding pipes one (12) are communicated with the front and rear of the outer surface of the second injection pressure pipe (11). The opposite ends of the two feeding pipes one (12) are respectively communicated with feeding pipes two (13). The right ends of the two feeding pipes two (13) are jointly connected to a feeding pipe three (14). A first piston (16) is movably connected inside the first injection pressure pipe (6). A first fixed rod (17) is fixedly connected to the right end of the first piston (16). The first fixed rod (17) is located on the right side of the first injection pressure pipe (6) and is rotatably connected to a connecting rod (18). The right end of the connecting rod (18) is rotatably connected to a crank (19). The rear of the outer surface of the crank (19) is rotatably connected to an L-shaped bracket (33). The L-shaped bracket (33) is fixedly connected to the rear surface of the support (4). A turntable (20) is fixed to the rear end of the crank (19). A servo motor (21) is fixed to the rear surface of the turntable (20). The front end of the output shaft of the servo motor (21) is fixedly connected to the rear end of the crank (19). A first helical gear (22) is fixed to the front end of the crank (19). A second helical gear (23) is meshed and connected to the bottom of the first helical gear (22). Two third helical gears (24) are symmetrically fixed to the outer surface of the first injection pressure pipe (6). An incomplete gear (25) is arranged between the two third helical gears (24) below the first injection pressure pipe (6). Transmission wheels (26) are respectively fixed to the bottoms of the incomplete gear (25) and the second helical gear (23). A transmission belt (27) is jointly arranged on the outer surfaces of the two transmission wheels (26). A second piston (28) is slidably connected inside the second injection pressure pipe (11). A second fixed rod (29) is fixedly connected to the top of the second piston (28). Two fixed rings (30) are fixed to the inner side of the base (2). Guide grooves (31) are respectively opened on the opposite sides of the two fixed rings (30). A guide rod (32) is jointly slidably connected inside the two guide grooves (31). The outer surface of the guide rod (32) is fixedly connected to the top of the second fixed rod (29).

2. The servo-driven die-casting machine according to claim 1, characterized in that: An injection port (71) is formed through the left end of the injection pipe (7). A valve port (81) is formed through the fixed valve (8). The valve port (81) is communicated with the injection port (71).

3. A servo-driven die casting machine according to claim 1, characterized in that: The material pipe three (14) is rotatably connected to the inside of the bracket two (5), the right end of the material pipe three (14) passes through the right side of the bracket two (5), and is rotatably connected with a transfer tube (15), the transfer tube (15) is fixedly connected to the bracket two (5), the material pipe three (14), the injection tube one (6), and the two fixing rings (30) are coaxial.

4. A servo-driven die casting machine according to claim 1, characterized in that: The guide groove (31) is a wave-shaped groove composed of a plurality of connected arc grooves.

5. A servo-driven die casting machine according to claim 1, characterized in that: The incomplete gear (25) is connected to the second bevel gear (23) via two transmission wheels (26) and a transmission belt (27).

6. A servo-driven die casting machine according to claim 1, characterized in that: The incomplete gear (25) is matched with the two bevel gears (24).

7. A servo-driven die casting machine according to claim 3, characterized in that: The material pipe three (14) is connected to an external heat preservation furnace via the transfer pipe (15), and the movable mold (10) is driven by an external mold clamping device.

8. A servo-driven die casting machine according to claim 1, characterized in that: The fixing ring (30) is a circular ring structure, the outer surface of the piston one (16) fits with the inner surface of the injection tube one (6), and the outer surface of the piston two (28) fits with the inner surface of the injection tube two (11).

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