Magnesium alloy die-casting forming equipment

Abstract

The invention provides magnesium alloy die-casting forming equipment, and belongs to the field of casting equipment, the magnesium alloy die-casting forming equipment comprises a base of a die-casting machine and a fixed die at the top of the base, a movable die is arranged at the top of the fixed die, a hydraulic oil cylinder for driving the movable die to move vertically is arranged at the top of the movable die, an annular containing groove is formed in the top of the fixed die, and an annular cutting mechanism is arranged in the containing groove. According to the device, the limiting ring, the cutter, the limiting sleeve, the servo motor, the gear and the cam are arranged, the servo motor drives the gear and the cam to rotate, a transmission relation is established between the gear and a tooth groove in the bottom of the limiting ring, and meanwhile the cam rotates to intermittently extrude the cutter to move in the vertical direction; according to the flash cutting device, extrusion force consistent with the rotation direction can be applied to the flash through rotation of the cutter, vertical movement of the cutter is matched, the cutter applies vertical extrusion force to the flash, and through organic cooperation of the two different extrusion forces, the better cutting effect is achieved, and the cutting efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of casting equipment, and particularly relates to a magnesium alloy die-casting forming equipment. Background Art

[0002] Magnesium alloy is an alloy material based on magnesium. Common magnesium alloy compositions include manganese, zinc, zirconium, aluminum, etc. The uniqueness of magnesium alloy lies not only in its low density, high strength, and outstanding elastic modulus, but also in its good impact load-bearing capacity, which shines in industrial fields such as chemical industry and hardware. The production and forming processes of magnesium alloy mainly include die-casting, extrusion, hot rolling, and powder metallurgy. Different forming methods are suitable for different shape and size requirements. Using die-casting equipment to manufacture magnesium alloy can make magnesium alloy castings have excellent dimensional accuracy and is suitable for mass production;

[0003] In the existing magnesium alloy die-casting equipment, a magnesium alloy permanent mold low-pressure casting cavity with the publication number of CN118357439A, after lifting the casting upper mold by a hydraulic cylinder, cancels the extrusion of several groups of T-shaped pressure rods, so that the T-shaped pressure rods pop outwards and drive the wire-receiving mechanism to move. When the T-shaped pressure rods move outwards, they will cancel the pulling of the second pull rope. At this time, the annular cutting knife will cut off the burrs and flash of the casting, which can facilitate the subsequent processing of magnesium alloy castings;

[0004] However, when this device is actually used, the annular cutting knife only cuts the flash of the casting through reciprocating motion in the vertical direction, with poor cutting effect, slow cutting speed, and low efficiency;

[0005] Therefore, we propose a new magnesium alloy die-casting forming equipment. Summary of the Invention

[0006] In view of this, the purpose of this application is to provide a magnesium alloy die-casting forming equipment to reduce the flash of magnesium alloy castings and improve product precision.

[0007] To solve the above technical problems, this application provides the following technical solutions:

[0008] A magnesium alloy die-casting forming equipment, including the base of the die-casting machine and the fixed mold on its top. A movable mold is arranged on the top of the fixed mold. A hydraulic cylinder for driving its vertical movement is arranged on the top of the movable mold. An annular receiving groove is arranged on the top of the fixed mold, and a circumferential cutting mechanism is arranged in the receiving groove;

[0009] The circumferential cutting mechanism includes: a cutting knife attached to the inner circumferential wall of the receiving groove. A limiting ring is sleeved outside the cutting knife, and a tooth groove is opened at the bottom of the limiting ring;

[0010] A servo motor is provided at the bottom of the receiving groove of the fixed mold. The output end of the servo motor is fixedly connected to a gear, which meshes with the tooth groove at the bottom of the limit ring. The other end of the gear is connected to a cam, and the cam is arranged at the bottom of the cutting tool.

[0011] A limit sleeve is provided on the upper side of the inner wall surface of the limit ring. A first spring is arranged inside the limit sleeve. A sliding groove is formed on the outer side wall of the cutting tool, and the limit sleeve is embedded in the sliding groove on the outer side wall of the cutting tool.

[0012] A limit mechanism is further provided at the opening position at the top of the receiving groove. The limit mechanism includes: a baffle plate, a connecting pipe, a connecting column and a second spring. The baffle plate is arranged above the cutting tool. A flow channel for the coolant to flow through is arranged inside the baffle plate. The connecting pipe is arranged on the side wall of the baffle plate. The connecting column is connected between the baffle plate and the outer wall of the inner ring of the receiving groove of the fixed mold. The second spring is arranged between the baffle plate and the connecting column.

[0013] Preferably, a groove is formed on the outer side wall of the baffle plate. The first end of the connecting column is embedded in the groove on the outer side of the baffle plate. The second end of the connecting column is fixed to the outer wall of the inner ring of the receiving groove of the fixed mold. The second spring is arranged between the first end of the connecting column and the groove on the outer side of the baffle plate.

[0014] The baffle plate is an arc-shaped plate. A plurality of the baffle plates are arranged in a circular array with the central axis of the fixed mold as the center. The top surface of the baffle plate is flush with the parting surface of the fixed mold. The concave inner wall surface of the baffle plate fits against the inner wall surface of the receiving groove of the fixed mold.

[0015] Preferably, a "C"-shaped flow channel is arranged inside the baffle plate. The internal flow channel of the baffle plate includes a horizontal part parallel to the bottom surface of the moving mold, and the internal flow channel of the baffle plate further includes a vertical part parallel to the vertical wall surface of the receiving groove of the fixed mold.

[0016] The connecting pipe is communicated with the flow channel inside the baffle plate, and a flange is arranged at the end of the connecting pipe.

[0017] A round hole is further arranged at the middle position of the side wall of the baffle plate. An electric heating wire is arranged in the round hole inside the baffle plate, and the electric heating wire is arranged in the notch of the internal flow channel of the baffle plate.

[0018] Preferably, an inclined groove is arranged at the bottom end corner of the baffle plate. The inclined groove at the bottom end corner of the baffle plate includes two inclined surfaces and a vertical surface. The inclined surface of the inclined groove at the bottom of the baffle plate is parallel to the inclined surface of the cutting edge of the cutting tool. The inclined groove of the baffle plate is arranged directly above the cutting tool.

[0019] Preferably, a crushing block is provided at the top of the limiting ring. The top of the crushing block is conical. A wedge block is provided on the outer side of the bottom of the baffle. The wedge block is arranged on the top of the crushing block. The inclined surface at the bottom of the wedge block is parallel to the inclined surface on the side of the crushing block away from the fixed mold.

[0020] Preferably, a limiting block is provided at the bottom edge of the baffle. An inclined surface is provided at the bottom of the limiting block. The inclined surface at the bottom of the limiting block is parallel to the inclined surface on the side of the crushing block close to the fixed mold.

[0021] Preferably, a sliding groove is provided inside the receiving groove of the fixed mold. A slider is arranged in the sliding groove on the side wall of the fixed mold. A third spring is provided at the bottom of the opening on the side wall of the slider. The other end of the third spring abuts against the bottom of the cutting knife.

[0022] The cutting knife includes a vertical part and a horizontal part. The horizontal part of the cutting knife is embedded in the sliding groove on the side wall of the slider.

[0023] Preferably, a first sleeve is provided on the lower side of the vertical wall surface of the limiting ring. A guiding block is provided at the opening of the first sleeve. The side of the guiding block penetrating through the vertical wall surface of the limiting ring is an inclined surface.

[0024] The other end of the first sleeve is connected to an oil pipe. The other end of the oil pipe is connected to a second sleeve. The second sleeve is connected to the bottom of the horizontal part of the limiting ring. A piston is arranged inside the second sleeve. The other end of the piston is connected to the bottom of the crushing block. A fourth spring is arranged between the piston and the second sleeve.

[0025] Preferably, a square chip removal hole is provided on the side wall of the fixed mold. The bottom edge of the chip removal hole is flush with the top surface of the limiting ring.

[0026] Preferably, a connecting seat is provided on the side wall of the receiving groove of the fixed mold. The connecting seat is clamped to the bottom of the horizontal part of the limiting ring. A bearing is arranged at the connecting part between the connecting seat and the limiting ring.

[0027] Compared with the prior art, the present application has at least the following beneficial effects:

[0028] In the present invention, by providing a limiting ring, a cutting knife, a limiting sleeve, a servo motor, a gear and a cam, the servo motor drives the gear and the cam to rotate. A transmission relationship is established between the gear and the tooth groove at the bottom of the limiting ring. At the same time, the cam rotates to intermittently squeeze the cutting knife to move in the vertical direction. The cutting knife can apply a squeezing force consistent with the rotation direction to the flash during rotation. Cooperating with the vertical movement of the cutting knife, the cutting knife applies a vertical squeezing force to the flash. Through the organic cooperation of two different squeezing forces, a better cutting effect is achieved and the cutting efficiency is improved.

[0029] In the present invention, by providing a baffle, a connecting pipe and a spring, a flow channel for the coolant to flow is provided inside the baffle. A liquid at a required temperature is injected into the connecting pipe by an external pumping device. The flow channel inside the baffle is filled by the pressure of the flowing liquid. By controlling the temperature of the injected liquid, the temperature of the baffle can be controlled, and the temperature of the flash part can be controlled during the casting forming stage, so as to control the state of the flash part, suppress the flow state of the flash part, and reduce the generation of flash.

[0030] In the present invention, by providing a baffle and an electric heating wire, the electric heating wire is designed at the central part of the baffle, and the electric heating wire is designed at the inner corner of the vertical part and the horizontal part of the flow channel inside the baffle, which is convenient for assisting in heating the liquid in the flow channel to prevent the temperature difference caused by the loss during the heat conduction process. By controlling the temperature of the baffle to be close to or the same as the temperature of the fixed mold and the moving mold, the temperature consistency is maintained, which is beneficial to preventing the uneven temperature distribution between the fixed mold and the moving mold, thereby reducing the flash phenomenon caused by the uneven distribution of the clamping force due to the thermal expansion and contraction caused by the temperature, and improving the product quality.

[0031] In the present invention, by providing a limiting ring, a crushing block and a wedge block, during the rotation of the limiting ring, through the organic cooperation of the crushing block and the wedge block, the waste can be crushed and refined. Under the action of the tip of the crushing block, the large-piece flash waste has a good crushing effect, which is convenient for collecting the waste for recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present disclosure and, together with the specification, are further used to explain the principles of the present disclosure and enable those skilled in the relevant art to implement and use the present disclosure.

[0033] Figure 1 is a schematic diagram of the overall structure in the present application;

[0034] Figure 2 is a front view of the overall structure in the present application;

[0035] Figure 3 is a schematic diagram of the sectional structure of the fixed mold in the present application;

[0036] Figure 4 is in the present application Figure 3 is an enlarged schematic diagram of part A;

[0037] Figure 5 is a top view of the fixed mold structure in the present application;

[0038] Figure 6 is a top view of the limiting ring structure in the present application;

[0039] Figure 7 is a bottom view of the baffle structure in the present application;

[0040] Figure 8 Schematic diagram of the broken block structure in this application;

[0041] Figure 9 Schematic diagram of the servo motor structure in this application;

[0042] Figure 10 Schematic diagram of the slider structure in this application;

[0043] Figure 11 Schematic diagram of the guide block structure in this application;

[0044] Figure 12 Schematic diagram of the cross-section structure of the second sleeve in this application.

[0045] [Reference numerals]

[0046] 1, Base; 2, Fixed mold; 201, Slider; 202, Third spring; 203, Connecting seat; 3, Movable mold; 4, Hydraulic cylinder; 5, Cutting knife; 501, Limit ring; 502, Limit sleeve; 503, First spring; 504, Broken block; 505, First sleeve; 5051, Guide block; 5052, Oil pipe; 506, Second sleeve; 5061, Piston; 5062, Fourth spring; 6, Servo motor; 601, Gear; 602, Cam; 7, Baffle; 701, Connecting pipe; 7011, Flange; 702, Connecting column; 703, Second spring; 704, Electric heating wire; 705, Wedge block; 706, Limit block. Detailed implementation manners

[0047] The following provides a detailed description of a magnesium alloy die-casting forming device provided by this application in combination with the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit this application.

[0048] As Figures 1 - 6 shown, a magnesium alloy die-casting forming device provided by an embodiment of this application includes the base 1 of the die-casting machine and the fixed mold 2 on its top. A movable mold 3 is arranged on the top of the fixed mold 2, and a hydraulic cylinder 4 for driving it to move vertically is arranged on the top of the movable mold 3. An annular receiving groove is arranged on the top of the fixed mold 2, and a circumcision mechanism is arranged in the receiving groove;

[0049] The circumcision mechanism includes: a cutting knife 5 attached to the inner wall surface of the receiving groove. A limit ring 501 is sleeved outside the cutting knife 5, and a tooth groove is opened at the bottom of the limit ring 501;

[0050] A servo motor 6 is provided at the bottom of the receiving groove of the fixed mold 2, and a gear 601 is fixedly connected to the output end of the servo motor 6. The gear 601 is meshed with the tooth groove at the bottom of the limiting ring 501. The other end of the gear 601 is connected to a cam 602, which is provided at the bottom of the cutter 5.

[0051] A limiting sleeve 502 is provided on the upper side of the inner wall of the limiting ring 501, a spring 503 is provided inside the limiting sleeve 502, a sliding groove is provided on the outer wall of the cutter 5, and the limiting sleeve 502 is embedded in the sliding groove of the outer wall of the cutter 5;

[0052] A limiting mechanism is also provided at the top opening position of the receiving groove, and the limiting mechanism includes: a baffle 7, a connecting pipe 701, a connecting column 702 and a second spring 703. The baffle 7 is provided above the cutter 5, and a flow channel for the flow of coolant is provided inside the baffle 7. The connecting pipe 701 is provided on the side wall of the baffle 7, the connecting column 702 is connected between the baffle 7 and the inner wall of the outer ring of the receiving groove of the fixed mold 2, and the second spring 703 is provided between the baffle 7 and the connecting column 702;

[0053] A molding cavity is provided between the fixed mold 2 and the movable mold 3, and a magnesium alloy liquid injection channel is provided on the top of the movable mold 3. A ladle is provided on the top of the movable mold 3, and the ladle is communicated with the injection channel. In the actual production process, the movable mold 3 is driven to move in the vertical direction by the hydraulic cylinder 4, and when the movable mold 3 is buckled on the fixed mold 2, the baffle 7 is pressed against the fixed mold 2 under the extrusion of the spring 2 703, and a plurality of baffles 7 are arranged in a ring to close the gap between the fixed mold 2 and the movable mold 3. The high-temperature magnesium alloy liquid can be injected into the molding cavity through the ladle to fill the entire molding cavity, and then the desired casting can be obtained after cooling;

[0054] During the production process, when flash appears on the casting, after the movable mold 3 is away from the fixed mold 2, the servo motor 6 is started to drive the gear 601 to rotate, and a transmission relationship is established between the gear 601 and the tooth groove at the bottom of the limit ring 501. When the limit ring 501 rotates, the cutter 5 is driven to rotate, and at the same time, the cam 602 rotates intermittently to squeeze the cutter 5 to make it move in the vertical direction;

[0055] During the process of the cutter 5 cutting the burrs, the cutter 5 can apply an extrusion force in the same direction of rotation to the burrs through rotation. Meanwhile, the cutting edge of the cutter 5 is in the process of changing, and it is not easy for the cutting edge to become blunt. With the vertical movement of the cutter 5, the cutter 5 applies a vertical extrusion force to the burrs. Through the organic cooperation of two different extrusion forces, a better cutting effect is achieved, and the cutting efficiency is improved.

[0056] During the upward movement of the cutting knife 5 in the vertical direction, the cutting knife 5 presses against the baffle 7, applying a pressing force to the baffle 7 to cause the baffle 7 to disengage from the fixed mold 2. The moving distance of the baffle 7 is the same as the width of the cutting knife 5. Thus, for flash wider than the cutting knife 5, the baffle 7 can provide good support for the flash. At the same time, under the extrusion of the second spring 703, the baffle 7 presses on the cutting knife 5, causing the cutting knife 5 to fit against the outer wall of the casting, thereby precisely cutting the flash and achieving a better cutting effect;

[0057] The liquid at the required temperature is injected into the connecting pipe 701 through an external pumping device. The pressure of the flowing liquid is used to fill the flow channels inside the baffle 7. By controlling the temperature of the injected liquid, the temperature of the baffle 7 can be controlled. During the casting forming stage, the temperature of the flash part can be controlled, thereby controlling the state of the flash part to suppress the flowing state of the flash part and reduce the generation of flash.

[0058] In this embodiment, as Figures 3 - 12 shown, a groove is formed on the outer wall of the baffle 7. The first end of the connecting column 702 is embedded in the groove on the outside of the baffle 7, and the second end of the connecting column 702 is fixed to the outer ring inner wall of the receiving groove of the fixed mold 2. The second spring 703 is arranged between the first end of the connecting column 702 and the groove on the outside of the baffle 7;

[0059] The baffle 7 is an arc-shaped plate. A number of baffles 7 are arranged in a circular array with the central axis of the fixed mold 2 as the center. The top surface of the baffle 7 is flush with the parting surface of the fixed mold 2, and the concave inner wall surface of the baffle 7 fits against the inner ring wall surface of the receiving groove of the fixed mold 2;

[0060] The side wall groove of the baffle 7 is in sliding fit with the connecting column 702, which provides a guiding function when the baffle 7 moves away from the open receiving groove of the fixed mold 2, enabling the baffle 7 to move smoothly. The baffle 7 is squeezed by the second spring 703 to achieve a stable effect and prevent the baffle 7 from impacting the fixed mold 2;

[0061] At the same time, since the baffle 7 is an arc-shaped plate, it can fit the opening shape of the top receiving groove of the fixed mold 2. A number of baffles 7 can form a closed ring after approaching and closing each other. Thus, the baffle 7 can just go around the inner ring part of the receiving groove once, thereby closing the gap between the fixed mold 2 and the moving mold 3, reducing the generation of flash, extending the penetration resistance and path of the magnesium alloy liquid, achieving a good sealing effect, and reducing the generation of flash phenomenon;

[0062] The baffle 7 has an extrusion effect on the fixed mold 2, which can limit the shape of the fixed mold 2 and disperse the mold expansion force received by the fixed mold 2 when impacted by the magnesium alloy liquid. At the same time, the baffle 7 has a supporting effect on the moving mold 3, which can achieve a good supporting effect to ensure the pressure of the contact surface, effectively disperse the demolding force generated by the moving mold 3 on the fixed mold 2 under the action of the hydraulic cylinder 4, is beneficial to achieving a higher clamping force, and reducing the generation of flash phenomenon.

[0063] Inside the baffle 7, a "C"-shaped flow channel is provided. The internal flow channel of the baffle 7 includes a horizontal portion parallel to the bottom surface of the moving mold 3, and the internal flow channel of the baffle 7 further includes a vertical portion parallel to the vertical wall surface of the receiving groove of the fixed mold 2;

[0064] The connecting pipe 701 is communicated with the internal flow channel of the baffle 7, and a flange 7011 is provided at the end of the connecting pipe 701;

[0065] A circular hole is also provided at the middle position of the side wall of the baffle 7, and an electric heating wire 704 is provided in the internal circular hole of the baffle 7. The electric heating wire 704 is arranged in the notch of the internal flow channel of the baffle 7;

[0066] The internal flow channel of the baffle 7 is designed to have a shape with multiple bending parts, and its bending parts include designs facing the corner positions of the baffle 7, which is beneficial to increasing the contact area between the external temperature-control liquid and the baffle 7, facilitating the rapid control of the temperature of the baffle 7. The baffle 7 can be made of a metal material with the characteristics of thermal expansion and contraction. By controlling the temperature of the external temperature-control liquid, the temperature of the baffle 7 can be regulated. When injecting high-temperature magnesium alloy liquid into the molding cavity, by controlling the temperature of the baffle 7 to be close to or the same as that of the fixed mold 2 and the moving mold 3, the temperature consistency can be maintained, which is beneficial to preventing the phenomenon of uneven temperature distribution between the fixed mold 2 and the moving mold 3;

[0067] During the cooling and forming stage of the magnesium alloy liquid in the molding cavity, both the fixed mold 2 and the moving mold 3 are in the cooling state. At this time, the baffle 7 is controlled to be close to or the same as the temperature of the fixed mold 2 and the moving mold 3, maintaining the temperature consistency, and preventing quality problems caused by stress concentration due to local over-cooling and shrinkage of the casting, thus improving the quality of the casting;

[0068] The internal flow channel of the baffle 7 includes a vertical part and a horizontal part. Among them, the vertical part is arranged close to the fixed mold 2, and the horizontal part is arranged close to the moving mold 3, which is beneficial to controlling the temperature of the contact parts between the baffle 7 and the fixed mold 2 and the moving mold 3;

[0069] The electric heating wire 704 is designed at the central part of the baffle 7, and the electric heating wire 704 is designed at the inner corner of the vertical part and the horizontal part of the internal flow channel of the baffle 7, which is convenient for assisting in heating the liquid in the flow channel to prevent temperature differences caused by heat loss during the heat conduction process;

[0070] By designing the flange 7011, it is convenient to connect the pipeline of the external pumping equipment and at the same time achieve a good sealing effect;

[0071] Among them, the electric heating wire 704 is provided with a supporting temperature sensor for detecting its working temperature.

[0072] The bottom end corners of the baffle 7 are provided with an inclined groove. The inclined groove at the bottom end corners of the baffle 7 includes two inclined surfaces and a vertical surface. The inclined surfaces of the inclined groove at the bottom of the baffle 7 are parallel to the edge inclined surfaces of the cutting knife 5. The inclined groove of the baffle 7 is arranged directly above the cutting knife 5;

[0073] A gap is designed between the inclined groove at the bottom of the baffle 7 and the fixed mold 2, facilitating the upward movement of the cutting knife 5. When the cutting knife 5 moves upward, it can extrude the baffle 7 to achieve the movement of the baffle 7. At the same time, due to the guiding effect of the inclined surface of the inclined groove on the cutting knife 5, the moving direction of the cutting knife 5 can be maintained. Due to the existence of the inclined groove, the cutting knife 5 can closely adhere to the fixed mold 2, thus accurately cutting off the flash.

[0074] At the top of the limiting ring 501, there is a crushing block 504. The top of the crushing block 504 is conical. On the outer side of the bottom of the baffle 7, there is a wedge block 705. The wedge block 705 is arranged on the top of the crushing block 504. The bottom inclined surface of the wedge block 705 is parallel to the inclined surface on the side of the crushing block 504 away from the fixed mold 2;

[0075] After the cutting knife 5 cuts the flash, the waste of the flash drops onto the top of the limiting ring 501 along the edge of the cutting knife 5. During the rotation of the limiting ring 501, the waste is affected by the centrifugal force and moves along the top surface of the limiting ring 501 towards its edge. When the waste moves to the position of the crushing block 504, it is vibrated and crushed under the extrusion of the crushing block 504. The crushing block 504 can crush and refine the waste. Under the action of the tip of the crushing block 504, it has a good crushing effect on large pieces of flash waste;

[0076] The top surface of the limiting ring 501 is a flat straight surface. When the waste moves to the inclined surface of the crushing block 504, its moving direction changes. There is also a wedge block 705 at the bottom of the baffle 7. Between the bottom inclined surface of the wedge block 705 and the inclined surface of the crushing block 504, there is an inclined channel, which is conducive to achieving the impact effect on the waste and achieving a better crushing and refining effect.

[0077] At the bottom edge of the baffle 7, there is a limiting block 706. The bottom of the limiting block 706 is provided with an inclined surface. The bottom inclined surface of the limiting block 706 is parallel to the inclined surface on the side of the crushing block 504 close to the fixed mold 2;

[0078] The inclined surface of the limiting block 706 at the bottom of the baffle 7 is used for organic cooperation with the crushing block 504 to achieve the crushing and refining of the waste.

[0079] Inside the receiving groove of the fixed mold 2, a sliding groove is opened. In the sliding groove on the side wall of the fixed mold 2, there is a slider 201. At the bottom of the opening on the side wall of the slider 201, there is a spring three 202. The other end of the spring three 202 abuts against the bottom of the cutting knife 5;

[0080] The cutting knife 5 includes a vertical part and a horizontal part. The horizontal part of the cutting knife 5 is embedded in the sliding groove on the side wall of the slider 201;

[0081] The slide block 201 slides in the slide groove on the side wall of the receiving groove to guide the cutter 5 to achieve stable and accurate movement of the cutter 5. The spring 3 202 buffers the cutter 5 to prevent the cutter 5 from cutting the flash edge by colliding with the hard surface, thereby protecting the cutter 5.

[0082] The horizontal portion of the cutter 5 is embedded in the opening of the slider 201 to prevent the cutter 5 from detaching upward from the slider 201 , thus playing a limiting role.

[0083] A sleeve 505 is disposed on the lower side of the vertical wall of the limiting ring 501, and a guide block 5051 is disposed at the opening of the sleeve 505. One side of the guide block 5051 that penetrates the vertical wall of the limiting ring 501 is an inclined surface;

[0084] The other end of the sleeve 1 505 is connected to an oil pipe 5052, and the other end of the oil pipe 5052 is connected to the sleeve 2 506, and the sleeve 2 506 is connected to the bottom of the horizontal part of the limit ring 501. A piston 5061 is arranged inside the sleeve 2 506, and the other end of the piston 5061 is connected to the bottom of the crushing block 504. A spring 4 5062 is arranged between the piston 5061 and the sleeve 2 506;

[0085] When the slider 201 moves relative to the guide block 5051, the slider 201 squeezes the inclined surface of the guide block 5051, so that the guide block 5051 is close to the sleeve 1 505. Hydraulic oil is injected into the sleeve 1 505. Based on the incompressible property of the hydraulic oil, the hydraulic oil in the sleeve 1 505 enters the sleeve 2 506 through the oil pipe 5052, so as to do work on the piston 5061. The piston 5061 squeezes the crushing block 504, so that the crushing block 504 moves upward, and the distance between the crushing block 504 and the wedge block 705 is compressed, and the waste between the crushing block 504 and the wedge block 705 is squeezed, so as to achieve a crushing effect.

[0086] At the same time, the crushing block 504 squeezes the wedge block 705, so that the wedge block 705 drives the baffle plate 7 away from the fixed mold 2, thereby facilitating the upward movement of the cutter 5, reducing the squeezing force of the baffle plate 7 on the cutter 5, and allowing the cutter 5 to move smoothly;

[0087] When the crushing block 504 is in an upwardly extending state and abuts against one side of the limit block 706, the crushing block 504 has a limiting effect on the limit block 706, and can limit the position of the limit block 706 and the baffle 7, so that the baffle 7 is close to the fixed mold 2;

[0088] Among them, the limit block 706 is set at the edge position of the baffle 7, and the crushing block 504 can contact with two adjacent and mutually fitting limit blocks 706 at the same time to achieve a positioning effect, with strong integrity and compact structure.

[0089] The side wall of the fixed mold 2 is provided with a square chip removal hole, and the bottom edge of the chip removal hole is flush with the top surface of the limit ring 501;

[0090] By rotating the limit ring 501 to apply a centrifugal force to the waste material, the waste material can be discharged from the chip removal channel. By collecting and utilizing the discharged waste material, the waste of resources can be reduced.

[0091] A connecting seat 203 is arranged on the side wall of the accommodating groove of the fixed mold 2. The connecting seat 203 is clamped to the bottom of the horizontal part of the limit ring 501, and a bearing is arranged at the connecting part of the connecting seat 203 and the limit ring 501;

[0092] The limit ring 501 is limited by the connecting seat 203, and at the same time, the smooth and stable rotation of the limit ring 501 is ensured by the bearing.

Claims

1. A magnesium alloy die-casting forming device, including the base (1) of a die-casting machine and the fixed die (2) at its top. A moving die (3) is arranged on the top of the fixed die (2), and a hydraulic cylinder (4) for driving the moving die (3) to move vertically is arranged on the top of the moving die (3). It is characterized in that, The top of the fixed mold (2) is provided with an annular receiving groove, and a circumcision mechanism is arranged in the receiving groove; The circumcision mechanism includes: a cutting knife (5) attached to the inner circumferential wall surface of the receiving groove. A limiting ring (501) is sleeved outside the cutting knife (5), and a tooth groove is formed at the bottom of the limiting ring (501); A servo motor (6) is arranged at the bottom of the receiving groove of the fixed mold (2). The output end of the servo motor (6) is fixedly connected with a gear (601). The gear (601) meshes with the tooth groove at the bottom of the limiting ring (501). The other end of the gear (601) is connected with a cam (602), and the cam (602) is arranged at the bottom of the cutting knife (5); A limiting sleeve (502) is arranged on the upper side of the inner circumferential wall surface of the limiting ring (501). A first spring (503) is arranged inside the limiting sleeve (502). A sliding groove is formed on the outer side wall of the cutting knife (5), and the limiting sleeve (502) is embedded in the sliding groove on the outer side wall of the cutting knife (5); A limiting mechanism is further arranged at the opening position at the top of the receiving groove. The limiting mechanism includes: a baffle (7), a connecting pipe (701), a connecting column (702) and a second spring (703). The baffle (7) is arranged above the cutting knife (5). A flow channel for the coolant to flow is arranged inside the baffle (7). The connecting pipe (701) is arranged on the side wall of the baffle (7). The connecting column (702) is connected between the baffle (7) and the outer circumferential inner wall of the receiving groove of the fixed mold (2). The second spring (703) is arranged between the baffle (7) and the connecting column (702).

2. The magnesium alloy die-casting forming equipment according to claim 1, wherein: A groove is formed on the outer side wall of the baffle (7). The first end of the connecting column (702) is embedded in the groove on the outer side of the baffle (7). The second end of the connecting column (702) is fixed to the outer circumferential inner wall of the receiving groove of the fixed mold (2). The second spring (703) is arranged between the first end of the connecting column (702) and the groove on the outer side of the baffle (7); The baffle (7) is an arc-shaped plate. A plurality of the baffles (7) are annularly arranged around the central axis of the fixed mold (2). The top surface of the baffle (7) is flush with the parting surface of the fixed mold (2). The concave inner wall surface of the baffle (7) is attached to the inner circumferential wall surface of the receiving groove of the fixed mold (2).

3. The magnesium alloy die-casting forming equipment according to claim 1, characterized in that: A "C"-shaped flow channel is arranged inside the baffle (7). The internal flow channel of the baffle (7) includes a horizontal part parallel to the bottom surface of the moving mold (3), and the internal flow channel of the baffle (7) further includes a vertical part parallel to the vertical wall surface of the receiving groove of the fixed mold (2); The connecting pipe (701) is communicated with the internal flow channel of the baffle (7), and a flange (7011) is arranged at the end of the connecting pipe (701); A round hole is further arranged at the middle position of the side wall of the baffle (7). An electric heating wire (704) is arranged in the round hole inside the baffle (7), and the electric heating wire (704) is arranged in the notch of the internal flow channel of the baffle (7).

4. The magnesium alloy die-casting forming equipment according to claim 1, characterized in that: A chute is provided at the bottom corner of the baffle (7). The chute at the bottom corner of the baffle (7) includes two inclined surfaces and a vertical surface. The inclined surfaces of the chute at the bottom of the baffle (7) are parallel to the edge inclined surfaces of the cutting tool (5). The chute of the baffle (7) is provided directly above the cutting tool (5).

5. The magnesium alloy die-casting forming equipment according to claim 1, characterized in that: A crushing block (504) is provided at the top of the limiting ring (501). The top of the crushing block (504) is conical. A wedge block (705) is provided on the outer side of the bottom of the baffle (7). The wedge block (705) is provided on the top of the crushing block (504). The bottom inclined surface of the wedge block (705) is parallel to the inclined surface on the side of the crushing block (504) away from the fixed mold (2).

6. The magnesium alloy die-casting forming equipment according to claim 1, wherein: A limiting block (706) is provided at the bottom edge of the baffle (7). The bottom of the limiting block (706) is provided with an inclined surface. The bottom inclined surface of the limiting block (706) is parallel to the inclined surface on the side of the crushing block (504) close to the fixed mold (2).

7. The magnesium alloy die-casting forming equipment according to claim 5, wherein: A chute is provided inside the receiving groove of the fixed mold (2). A slider (201) is provided in the chute on the side wall of the fixed mold (2). A third spring (202) is provided at the bottom of the opening on the side wall of the slider (201). The other end of the third spring (202) abuts against the bottom of the cutting tool (5). The cutting tool (5) includes a vertical portion and a horizontal portion. The horizontal portion of the cutting tool (5) is embedded in the chute on the side wall of the slider (201).

8. The magnesium alloy die-casting forming equipment according to claim 7, wherein: A first sleeve (505) is provided on the lower side of the vertical wall surface of the limiting ring (501). A guiding block (5051) is provided at the opening of the first sleeve (505). The side of the guiding block (5051) penetrating through the vertical wall surface of the limiting ring (501) is an inclined surface. The other end of the first sleeve (505) is connected to an oil pipe (5052). The other end of the oil pipe (5052) is connected to a second sleeve (506). The second sleeve (506) is connected to the bottom of the horizontal portion of the limiting ring (501). A piston (5061) is provided inside the second sleeve (506). The other end of the piston (5061) is connected to the bottom of the crushing block (504). A fourth spring (5062) is provided between the piston (5061) and the second sleeve (506).

9. The magnesium alloy die-casting forming equipment according to claim 1, characterized in that: A square chip removal hole is provided on the side wall of the fixed mold (2). The bottom edge of the chip removal hole is flush with the top surface of the limiting ring (501).

10. The magnesium alloy die-casting forming equipment according to claim 1, wherein: A connecting seat (203) is provided on the side wall of the receiving groove of the fixed mold (2). The connecting seat (203) is clamped to the bottom of the horizontal portion of the limiting ring (501). A bearing is provided at the connecting portion between the connecting seat (203) and the limiting ring (501).

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