Pressurizing casting equipment for alloy steel casting

Abstract

The invention discloses pressurizing casting equipment for alloy steel casting, and relates to the technical field of pressurizing casting, the pressurizing casting equipment comprises a fixing frame, a fixed mold body is fixedly installed on the fixing frame, the pressurizing casting equipment further comprises a movable mold body, the movable mold body is installed on the fixing frame through two sliding assemblies, a pouring opening is formed in the fixed mold body, and the movable mold body is connected with the fixed mold body. A liquid inlet cavity matched with the pouring opening is formed in the movable mold body; the pressing plate is installed on the fixing frame through two lifting assemblies, and the two lifting assemblies and the two sliding assemblies operate synchronously; the top die is installed at the bottom of the pressing plate in a sliding mode. The invention has the advantages that: after the pressure in the cavity reaches a threshold value, the gas pressure can be automatically converted into physical pressure, so that the constant pressure in the forming process can be maintained, the quality and performance of a casting can be effectively ensured, the demolding treatment after the casting is formed can be automatically completed, and the overall working efficiency is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure casting, and particularly relates to a pressure casting device for alloy steel casting. Background Technique

[0002] Alloy steel is an iron-carbon alloy formed by adding an appropriate amount of one or more alloying elements on the basis of ordinary carbon steel. According to the different added elements, it can meet the usage requirements in different fields. For example, titanium alloy steel added with titanium element is a material widely used in the aerospace industry. When casting titanium alloy steel, in order to improve the quality and performance of the casting, the pressure casting method is generally used to complete the production and processing.

[0003] When the existing pressure casting device works, generally, the liquid metal is first filled into the mold cavity by gas flushing (using inert gas), and then the gas pressure is increased to discharge the gas in the liquid metal and apply a certain pressure to the liquid metal to make it stably formed. However, the air pressure during the gas flushing process is not easy to control. When the pressure is too high, gas will enter the liquid metal to form cavities, and when the pressure is too low, the quality of the casting cannot be guaranteed. At present, the existing pressure casting device cannot convert the pressure form according to the pressure change in the cavity, and the demolding difficulty of the casting after casting is also relatively large. Therefore, it is necessary to design a pressure casting device for alloy steel casting. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a pressure casting device for alloy steel casting, which solves the problems raised in the above background technique.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A pressure casting device for alloy steel casting, including a fixed frame, on which a fixed mold body is fixedly installed, and further includes: A moving mold body, which is installed on the fixed frame through two sliding components. A pouring port is opened on the fixed mold body, and a liquid inlet cavity matching the pouring port is opened on the moving mold body; A pressing plate, which is installed on the fixed frame through two lifting components, and the two lifting components operate synchronously with the two sliding components; A top mold, which is slidably installed at the bottom of the pressing plate, and the top mold, the moving mold body and the fixed mold body are spliced to form a cavity; A buffer component, which is used to change the volume of the cavity when the pressure in the cavity rises. The buffer component includes a sealing plate that is hermetically and slidably installed on the moving mold body; The pressing component is used to increase the pressure applied downward by the top die when the buffering component is operating. The pressing component includes two connecting racks fixedly installed on the top of the top die, and two through grooves are formed on the pressing plate and are slidably matched with the corresponding connecting racks.

[0006] Furthermore, the sliding component is composed of a fixed rod, a chute, a first lead screw, and a first bevel gear. The fixed rod is fixedly installed on the moving die body. The chute is formed on the fixed frame, and the chute is slidably matched with the fixed rod. The first lead screw is rotatably installed on the fixed frame, and one end of the first lead screw located in the chute is threadedly connected to the fixed rod. The first bevel gear is fixedly installed on the first lead screw.

[0007] Furthermore, the lifting component is composed of a lifting groove, a lifting block, a second lead screw, and a second bevel gear. The lifting groove is formed on the fixed frame. The lifting block is fixedly installed on the side wall of the pressing plate, and the lifting block is slidably connected to the lifting groove. The second lead screw is rotatably installed on the fixed frame, and one end of the second lead screw located in the lifting groove is threadedly connected to the lifting block. The second bevel gear is fixedly installed on the second lead screw, and the second bevel gear meshes with the first bevel gear.

[0008] Furthermore, a servo motor is fixedly installed on the top of the fixed frame through a mounting frame, and the output end of the servo motor is fixedly connected to a driving rod rotatably matched with the mounting frame. A chain drive structure is installed between the driving rod and the two second lead screws.

[0009] Furthermore, a plurality of connecting rods are fixedly installed on the bottom of the pressing plate. A plurality of connecting grooves are formed on the top die and are slidably matched with the corresponding connecting rods, and a tension spring is installed between each connecting groove and the corresponding connecting rod.

[0010] Furthermore, a cavity is formed on the moving die body and is hermetically and slidably matched with the sealing plate. A plurality of springs are installed between the cavity and the sealing plate. Two conduits are formed at the bottom of the cavity. Two through holes communicating with the corresponding conduits are formed on the side wall of the moving die body, and the two through holes are respectively corresponding to the two fixed rods. Two piston plates are hermetically and slidably installed in the two through holes.

[0011] Furthermore, a mounting rod is fixedly installed on the top of the piston plate, and a fixed rack is fixedly installed on the side wall of the mounting rod. A moving groove is formed on the fixed rod and is slidably matched with the mounting rod and the fixed rack. A connecting gear is rotatably installed on the pressing plate and is matched with the fixed rack, and the connecting gear meshes with the connecting rack.

[0012] Furthermore, a side groove is formed on the moving die body, and a rotating rod is fixedly installed in the side groove. A positioning plate is rotatably installed on the rotating rod, and torsion springs are installed between both ends of the positioning plate and the side groove. A plurality of positioning grooves are formed on the side wall of the top die and are matched with the positioning plate.

[0013] Compared with the existing technology, the advantages of the present invention are as follows: 1: Through the cooperation of the movable moving die body and the top die, the splicing or disassembly of the die can be quickly completed, and the multi-body disassembly greatly reduces the subsequent demoulding difficulty, effectively improving the overall working efficiency.

[0014] 2: Through the cooperation of the buffer component and the pressure application component, after the pressure in the cavity reaches the threshold value, the gas pressure can be automatically converted into physical pressure, so as to maintain the constancy of the pressure during the forming process, effectively ensuring the quality and performance of the casting.

[0015] 3: Through the cooperation of the positioning plate and the positioning groove, when using the position change of the top die to convert the pressure form, it can ensure that the top die will not be displaced due to the reaction force, so as to ensure the stability of the pressure form conversion.

[0016] In summary, after the pressure in the cavity reaches the threshold value, the present invention can automatically convert the gas pressure into physical pressure, so as to maintain the constancy of the pressure during the forming process, effectively ensuring the quality and performance of the casting, and the demoulding treatment after the casting is formed can be automatically completed, effectively improving the overall working efficiency. Brief Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of a pressure-boosting casting device for alloy steel casting proposed by the present invention; Figure 2 is Figure 1 a schematic structural diagram from another perspective; Figure 3 is Figure 2 a top view of; Figure 4 is Figure 3 a schematic structural diagram of the A-A plane in; Figure 5 is Figure 3 a schematic structural diagram of the B-B plane in; Figure 6 is Figure 4 a schematic enlarged structural diagram of the a part in; Figure 7 is Figure 5 a schematic enlarged structural diagram of the b part in; Figure 8 is Figure 1 a schematic structural diagram at the fixed die body in; Figure 9 is Figure 1 a schematic structural diagram at the movable die body in; Figure 10 is Figure 1 a schematic structural diagram at the pressure plate in; Figure 11 is Figure 1 a schematic structural view at the middle top mold; Figure 12 is Figure 9 a schematic structural view from another perspective; Figure 13 is Figure 11 a schematic structural view from another perspective.

[0018] In the figure: 1. fixed frame; 2. fixed mold body; 3. movable mold body; 4. pressing plate; 5. top mold; 6. cavity; 7. pouring port; 8. liquid inlet cavity; 9. fixed rod; 10. first lead screw; 11. first bevel gear; 12. lifting groove; 13. lifting block; 14. second lead screw; 15. second bevel gear; 16. servo motor; 17. driving rod; 18. chain drive structure; 19. connecting groove; 20. connecting rod; 21. tension spring; 22. cavity; 23. sealing plate; 24. spring; 25. conduit; 26. piston plate; 27. mounting rod; 28. fixed rack; 29. moving groove; 30. connecting gear; 31. connecting rack; 32. through groove; 33. side groove; 34. rotating rod; 35. positioning plate; 36. positioning groove. Specific implementation mode

[0019] Referring to Figures 1 - 13 , a pressure casting device for alloy steel casting includes a fixed frame 1, on which a fixed mold body 2 is fixedly installed, and further includes: a movable mold body 3, the movable mold body 3 is installed on the fixed frame 1 through two sliding components, the sliding components are composed of a fixed rod 9, a chute, a first lead screw 10 and a first bevel gear 11, the fixed rod 9 is fixedly installed on the movable mold body 3, the chute is opened on the fixed frame 1, and the chute is slidably matched with the fixed rod 9, the first lead screw 10 is rotatably installed on the fixed frame 1, and one end of the first lead screw 10 located in the chute is threadedly connected with the fixed rod 9, the first bevel gear 11 is fixedly installed on the first lead screw 10, when the first lead screw 10 rotates, the cooperation between the fixed rod 9 and the chute enables the movable mold body 3 to move closer to or away from the fixed mold body 2, facilitating the connection during casting and the separation during demolding.

[0020] The fixed die body 2 is provided with a pouring port 7, and the moving die body 3 is provided with a liquid inlet cavity 8 that cooperates with the pouring port 7. The pouring port 7 is used to fill the liquid metal into the cavity 6 by means of gas flushing. The equipment for gas flushing is an existing product, and its working principle and specific structure will not be elaborated here. At the same time, the equipment for gas flushing is not shown in the figure. The liquid inlet cavity 8 is used to input the liquid metal from one end of the moving die body 3 into the cavity 6, which is convenient for demoulding after subsequent forming. In addition, reasonable exhaust channels and exhaust holes are provided in the cavity 6 to ensure that the gas in the cavity 6 can be smoothly discharged during the filling process of the liquid metal. These exhaust channels and exhaust holes are usually arranged at the top, corners and other parts of the casting mold that are prone to gas accumulation, so that the gas can escape in time and avoid being wrapped by the liquid metal and mixed into it. The setting of the exhaust channels and exhaust holes is also an existing technology, so it is not shown in the figure.

[0021] The pressing plate 4 is installed on the fixed frame 1 through two lifting components, and the two lifting components operate synchronously with the two sliding components. The lifting component is composed of a lifting groove 12, a lifting block 13, a second lead screw 14 and a second bevel gear 15. The lifting groove 12 is opened on the fixed frame 1. The lifting block 13 is fixedly installed on the side wall of the pressing plate 4, and the lifting block 13 is slidably connected with the lifting groove 12. The second lead screw 14 is rotatably installed on the fixed frame 1, and one end of the second lead screw 14 located in the lifting groove 12 is threadedly connected with the lifting block 13. The second bevel gear 15 is fixedly installed on the second lead screw 14, and the second bevel gear 15 meshes with the first bevel gear 11. When the second lead screw 14 rotates, the pressing plate 4 can move up and down relative to the fixed die body 2 through the cooperation of the lifting groove 12 and the lifting block 13, so as to drive the top die 5 to move up and down relative to the fixed die body 2. Through the meshing action of the first bevel gear 11 and the second bevel gear 15, when the second lead screw 14 rotates, the first lead screw 10 can be driven to rotate at the same time, so that the top die 5 and the moving die body 3 approach or separate from the fixed die body 2 at the same time, which is convenient for quickly completing the splicing of the whole equipment or the demoulding of the casting.

[0022] The top of the fixed frame 1 is fixedly installed with a servo motor 16 through a mounting frame, and the output end of the servo motor 16 is fixedly connected with a driving rod 17 that is rotationally matched with the mounting frame. A chain drive structure 18 is installed between the driving rod 17 and the two second lead screws 14. The servo motor 16 can specifically adopt a servo motor of model 130ST-M05025LFB. The chain drive structure 18 is an existing technology, and its working principle and specific structure will not be elaborated here. When the servo motor 16 works, it can provide drive for the two second lead screws 14 at the same time through the chain drive structure 18, so as to drive the movement of the top die 5 and the moving die body 3.

[0023] The top mold 5 is slidably installed at the bottom of the pressure plate 4. After the top mold 5 is spliced with the moving die body 3 and the fixed die body 2, a cavity 6 is formed. A plurality of connecting rods 20 are fixedly installed at the bottom of the pressure plate 4. A plurality of connecting grooves 19 that are slidably matched with the corresponding connecting rods 20 are formed on the top mold 5. A tension spring 21 is installed between each connecting groove 19 and the corresponding connecting rod 20. Under the pulling force of the tension spring 21, the top mold 5 remains in close contact with the pressure plate 4 when not under downward pressure. The cross-sections of the connecting rod 20 and the connecting groove 19 are both inverted T-shaped, which can ensure the moving direction of the top mold 5 relative to the pressure plate 4 and the stable connection between the two. Through the cooperation of the connecting groove 19 and the connecting rod 20, the top mold 5 can move relative to the pressure plate 4. Therefore, after the pressure plate 4, the fixed die body 2, and the moving die body 3 are spliced and their positions remain unchanged, the downward movement of the top mold 5 can be used to apply pressure to the liquid metal located in the cavity 6, so that it is formed under a certain pressure, improving the quality of the casting.

[0024] The buffer assembly is used to change the volume of the cavity 6 when the pressure in the cavity 6 increases. The buffer assembly includes a sealing plate 23 that is slidably installed on the moving die body 3. A cavity 22 that is slidably sealed with the sealing plate 23 is formed on the moving die body 3. A plurality of springs 24 are installed between the cavity 22 and the sealing plate 23. Two conduits 25 are formed at the bottom of the cavity 22. Two through holes that communicate with the corresponding conduits 25 are formed on the side wall of the moving die body 3, and the two through holes are respectively corresponding to the positions of the two fixed rods 9. Piston plates 26 are slidably installed in the two through holes in a sealed manner. When the pressure in the cavity 6 does not reach the threshold value, the sealing plate 23 is in a protruding state due to the elastic force of the spring 24. When the cavity 6 is filled with liquid metal and gas pressure is applied to it, the increase in pressure will cause the sealing plate 23 to overcome the elastic force of the spring 24 and enter the cavity 22. Subsequently, the cavity 6 becomes a complete space for the casting to be formed. After casting is completed, the top mold 5, the moving die body 3, and the fixed die body 2 are separated. At this time, the cavity 6 is in an open state, and the air pressure decreases. The elastic force of the spring 24 will cause the sealing plate 23 to move upward, pushing the casting away from the moving die body 3, so that the demolding process is automatically completed.

[0025] The pressure - applying assembly is used to increase the pressure applied downward by the top die 5 when the buffering assembly is operating. The pressure - applying assembly includes two connecting racks 31 fixedly installed on the top of the top die 5. Two through - slots 32 that are slidably engaged with the corresponding connecting racks 31 are provided on the pressure plate 4. An installation rod 27 is fixedly installed on the top of the piston plate 26, and a fixed rack 28 is fixedly installed on the side wall of the installation rod 27. A moving slot 29 that is slidably engaged with the installation rod 27 and the fixed rack 28 is provided on the fixed rod 9. A connecting gear 30 that is engaged with the fixed rack 28 is rotatably installed on the pressure plate 4, and the connecting gear 30 is meshed with the connecting rack 31. When the sealing plate 23 moves downward, the gas makes the piston plate 26 move upward through the conduit 25. The piston plate 26 drives the fixed rack 28 to move through the installation rod 27. Then, the movement of the fixed rack 28 drives the connecting gear 30 to rotate, and further makes the connecting rack 31 on the other side meshed with it move downward. Therefore, the top die 5 moves downward. The pressure applied by the top die 5 to the liquid metal in the cavity 6 makes it better formed. At the same time, the pressure applied by the top die 5 also makes the sealing plate 23 remain in the same position in the cavity 22. Thus, when the gas pressure applied reaches the threshold value, the top die 5 automatically applies a physical pressure to the liquid metal, so as to better ensure the pressure magnitude and improve the forming effect.

[0026] A side slot 33 is provided on the moving die body 3, and a rotating rod 34 is fixedly installed in the side slot 33. A positioning plate 35 is rotatably installed on the rotating rod 34, and torsion springs are installed between both ends of the positioning plate 35 and the side slot 33. A plurality of positioning slots 36 that are engaged with the positioning plate 35 are provided on the side wall of the top die 5. The elastic force of the torsion spring applies a force to keep the positioning plate 35 in a horizontal state. The installation position of the positioning plate 35 in the side slot 33 enables it to deflect downward but not upward. Therefore, after the positioning plate 35 is inserted into the positioning slot 36, the top die 5 can only move downward relative to the moving die body 3, so as to ensure the stability of the position of the top die 5 moving downward after being affected by the sealing plate 23, and ensure the pressure effect exerted on the casting in the cavity 6.

[0027] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above - mentioned embodiments. What is described in the above - mentioned embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A pressure casting device for alloy steel casting, comprising a fixed frame (1), and a fixed die body (2) is fixedly installed on the fixed frame (1), characterized in that, It further includes: A moving die body (3), the moving die body (3) is installed on a fixed frame (1) through two sliding components, a pouring port (7) is formed on the fixed die body (2), and a liquid inlet cavity (8) matching the pouring port (7) is formed on the moving die body (3); A pressing plate (4), the pressing plate (4) is installed on the fixed frame (1) through two lifting components, and the two lifting components operate synchronously with the two sliding components; A top die (5), the top die (5) is slidably installed at the bottom of the pressing plate (4), and after the top die (5) is spliced with the moving die body (3) and the fixed die body (2), a cavity (6) is formed; A buffer component, the buffer component is used to change the volume of the cavity (6) when the pressure in the cavity (6) increases, and the buffer component includes a sealing plate (23) sealed and slidably installed on the moving die body (3); A pressing component, the pressing component is used to increase the pressure applied downward by the top die (5) when the buffer component operates, and the pressing component includes two connecting racks (31) fixedly installed on the top of the top die (5), and two through grooves (32) slidably matched with the corresponding connecting racks (31) are formed on the pressing plate (4).

2. The pressure casting equipment for alloy steel casting according to claim 1, wherein The sliding component is composed of a fixed rod (9), a chute, a first lead screw (10) and a first bevel gear (11). The fixed rod (9) is fixedly installed on the moving die body (3), the chute is formed on the fixed frame (1), and the chute is slidably matched with the fixed rod (9). The first lead screw (10) is rotatably installed on the fixed frame (1), and one end of the first lead screw (10) located in the chute is threadedly connected with the fixed rod (9). The first bevel gear (11) is fixedly installed on the first lead screw (10).

3. The pressure casting device for alloy steel casting according to claim 2, characterized in that, The lifting component is composed of a lifting groove (12), a lifting block (13), a second lead screw (14) and a second bevel gear (15). The lifting groove (12) is formed on the fixed frame (1), the lifting block (13) is fixedly installed on the side wall of the pressing plate (4), and the lifting block (13) is slidably connected with the lifting groove (12). The second lead screw (14) is rotatably installed on the fixed frame (1), and one end of the second lead screw (14) located in the lifting groove (12) is threadedly connected with the lifting block (13). The second bevel gear (15) is fixedly installed on the second lead screw (14), and the second bevel gear (15) is meshed with the first bevel gear (11).

4. A pressure casting device for alloy steel casting according to claim 3, characterized in that, A servo motor (16) is fixedly installed on the top of the fixed frame (1) through a mounting frame, and an output end of the servo motor (16) is fixedly connected with a driving rod (17) rotatably matched with the mounting frame. A chain drive structure (18) is installed between the driving rod (17) and the two second lead screws (14).

5. The pressure casting equipment for alloy steel casting according to claim 1, characterized in that, A plurality of connecting rods (20) are fixedly installed at the bottom of the pressing plate (4), a plurality of connecting grooves (19) slidably matched with the corresponding connecting rods (20) are formed on the top die (5), and a tension spring (21) is installed between each connecting groove (19) and the corresponding connecting rod (20).

6. The pressure casting device for alloy steel casting according to claim 1, characterized in that, A cavity (22) which is in sealed sliding fit with the sealing plate (23) is formed in the moving die body (3), and a plurality of springs (24) are installed between the cavity (22) and the sealing plate (23). Two conduits (25) are formed at the bottom of the cavity (22). Through holes which communicate with the corresponding conduits (25) are formed in the side wall of the moving die body (3), and the two through holes correspond to the two fixing rods (9) respectively. Piston plates (26) are installed in the two through holes in a sealed and sliding manner.

7. The pressure casting device for alloy steel casting according to claim 6, characterized in that, An installation rod (27) is fixedly installed at the top of the piston plate (26), and a fixed rack (28) is fixedly installed on the side wall of the installation rod (27). A moving groove (29) which is in sliding fit with the installation rod (27) and the fixed rack (28) is formed in the fixing rod (9). A connecting gear (30) which is matched with the fixed rack (28) is rotatably installed on the pressing plate (4), and the connecting gear (30) is meshed with a connecting rack (31).

8. The pressure-increasing casting equipment for alloy steel casting according to claim 1, characterized in that, A side groove (33) is formed in the moving die body (3), and a rotating rod (34) is fixedly installed in the side groove (33). A positioning plate (35) is rotatably installed on the rotating rod (34), and torsion springs are installed between the two ends of the positioning plate (35) and the side groove (33). A plurality of positioning grooves (36) which are matched with the positioning plate (35) are formed in the side wall of the top die (5).

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