A casting mold clamping fixture

Abstract

The utility model relates to foundry equipment field discloses a kind of foundry model clamping fixing device, including base and the guide rod of fixed connection on base, clamping assembly and fixed component, the guide rod is fixedly connected with top plate, the hydraulic cylinder is fixedly connected on the top plate, the output end of the hydraulic cylinder is fixedly connected with upper die plate, the stamping head is fixedly connected on the upper die plate, the return spring is fixedly connected on the upper die plate, the lower die plate is fixedly connected on the return spring, the upper mould is provided on the lower die plate, the lower mould is provided on the base, the clamping assembly is set on base. In the utility model, by setting two groups of mirror image air cylinder and clamping plate synergistic effect, can provide uniform stable clamping force to lower mould, while using with inclined plane dowel under the action of telescopic spring and the through-hole of lower mould Automatic insertion positioning, realize the quick, accurate positioning and firm fixation of lower mould of different volume.

Description

Technical Field

[0001] This utility model relates to the field of casting equipment, and in particular to a casting mold clamping and fixing device. Background Technology

[0002] Casting is an important industrial method for obtaining metal blanks with complex structures. Its core step is to use a casting mold to form a casting cavity, pour in molten metal, and let it cool and solidify to form a casting. During this process, ensuring that the upper and lower molds maintain precise and stable alignment and tight fit after mold closing is the key to preventing defects such as flash, burrs, dimensional deviations, and even arcing in the casting. Therefore, the reliability, convenience, and accuracy of the casting mold clamping and fixing device directly determine the efficiency, safety, and quality of the final product in casting production.

[0003] Currently, in foundries or traditional processes, the clamping and fixing of models mainly relies on several mechanical manual operations. The most common method is to use manual bolts and nuts, which are passed through the pre-drilled holes in the mold box flange and then tightened directly by workers using wrenches. In addition, eccentric wheel quick clamps are often used, where the eccentric wheel is moved past the dead point and self-locked by turning the pressure arm to clamp the model. Another common method is to use modular screw clamps, where the screw is turned so that the pressure head at the end presses against the model, and the force amplification effect of the screw pair is used to achieve fixation. These methods all achieve model fastening through simple mechanical principles and manual operation.

[0004] Traditional fixing methods rely heavily on manual adjustment and tightening, which can easily lead to uneven stress on various points of the mold. This can cause slight displacement during mold closing or pouring, directly affecting the shape and position accuracy and internal quality of the casting. Secondly, these methods have weak positioning capabilities, and mold alignment mainly relies on visual observation and manual adjustment, which is inefficient and difficult to guarantee accuracy. Furthermore, when it is necessary to change the mold, traditional clamping methods are cumbersome to operate, have long debugging time, and the equipment has poor production flexibility and adaptability, making it difficult to quickly respond to the production needs of multiple varieties. Therefore, a casting mold clamping and fixing device is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a casting model clamping and fixing device, which aims to improve the problems of low positioning accuracy, cumbersome operation and poor adaptability of the existing casting model clamping and fixing device.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a casting mold clamping and fixing device, comprising... A base and a guide rod fixedly connected to the base. A top plate is fixedly connected to the guide rod. A hydraulic cylinder is fixedly connected to the top plate. An upper template is fixedly connected to the output end of the hydraulic cylinder. A punching head is fixedly connected to the upper template. A return spring is fixedly connected to the upper template. A lower template is fixedly connected to the return spring. An upper mold is provided on the lower template. A lower mold is provided on the base. A clamping assembly is disposed on a base and is used to provide clamping force to the lower mold; A fixing component is disposed on the base and is used to provide a fixing force to the lower mold.

[0007] As a further description of the above technical solution: The clamping assembly includes a cylinder and a clamping plate. The cylinder is fixed on the base, and the output end of the cylinder is fixedly connected to the clamping plate.

[0008] As a further description of the above technical solution: The clamping plate has rounded corners at its edges.

[0009] As a further description of the above technical solution: The lower mold has a through hole, and the base has a mounting hole. The fixing assembly includes several sets of positioning pins, several sets of fixing plates, several sets of telescopic springs, and several sets of discs. The fixing plates are fixed in the mounting holes, the positioning pins pass through the fixing plates, the discs are fixed on the positioning pins, the two ends of the telescopic springs are respectively fixed on the fixing plates and the discs, the telescopic springs are sleeved on the positioning pins, and the through holes are adapted to the positioning pins.

[0010] As a further description of the above technical solution: Both sides of the positioning pin are provided with bevels.

[0011] As a further description of the above technical solution: The port of the through hole is chamfered.

[0012] As a further description of the above technical solution: The lower template has an embedded groove, and a connecting block is provided in the embedded groove. The embedded groove is adapted to the connecting block. The upper mold is fixed on the connecting block. The connecting block has an insertion hole. A folding plate is hinged to the lower template. An insertion block is fixedly connected to the folding plate. A straight groove is provided on the folding plate. A screw is threaded into the lower template. An elongated plate is fixedly connected to the screw. The elongated plate is adapted to the straight groove.

[0013] As a further description of the above technical solution: Both the embedding slot and the connecting block are T-shaped.

[0014] As a further description of the above technical solution: The side of the insert block away from the folding plate has a chamfer.

[0015] As a further description of the above technical solution: The plug is inserted into the socket.

[0016] This utility model has the following beneficial effects: 1. In this utility model, by setting up a clamping assembly driven by a cylinder and a positioning pin assembly held by a spring to work together, a fixed process of first accurately positioning the lower mold and then forcefully locking it is realized. The positioning pin ensures the initial position accuracy of the mold before clamping and effectively prevents micro-displacement. The clamping plates on both sides provide uniform and stable main clamping force. The coordination of the two in terms of timing and function overcomes the defects of uneven force and low positioning accuracy of the traditional manual fixing method, effectively improves casting accuracy and operating efficiency, and avoids damage to the mold surface.

[0017] 2. In this utility model, the T-slot and connecting block are matched to achieve quick centering and prevent detachment of the upper mold. The mechanical mechanism with flip-locking is adopted. The upper mold can be stably clamped and quickly released by rotating the screw, which replaces the traditional cumbersome bolt fastening method, shortens the mold replacement and debugging time, and improves the production efficiency and operation convenience of the equipment. Attached Figure Description

[0018] Figure 1 This is a front view schematic diagram of the main structure of a casting model clamping and fixing device proposed in this utility model; Figure 2 This is a bottom view schematic diagram of the main structure of a casting model clamping and fixing device proposed in this utility model; Figure 3 This utility model proposes a clamping and fixing device for casting molds. Figure 2 Enlarged view of region A in the middle; Figure 4 This is a top view schematic diagram of the main structure of a casting model clamping and fixing device proposed in this utility model; Figure 5 This utility model proposes a clamping and fixing device for casting molds. Figure 4 Enlarged schematic diagram of region B in the middle.

[0019] Legend: 1. Base; 2. Guide rod; 3. Top plate; 4. Hydraulic cylinder; 5. Upper template; 6. Punch head; 7. Return spring; 8. Lower template; 9. Upper mold; 10. Lower mold; 11. Cylinder; 12. Clamping plate; 13. Through hole; 14. Mounting hole; 15. Positioning pin; 16. Fixing plate; 17. Telescopic spring; 18. Disc; 19. Inclined surface; 20. Embedded groove; 21. Connecting block; 22. Insertion hole; 23. Folding plate; 24. Insertion block; 25. Screw; 26. Long oval plate; 27. Straight groove. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Reference Figures 1-3 An embodiment of this utility model provides a casting model clamping and fixing device, including a base 1 and a guide rod 2, a clamping assembly, and a fixing assembly fixedly connected to the base 1. A top plate 3 is fixedly connected to the guide rod 2, and a hydraulic cylinder 4 is fixedly connected to the top plate 3. An upper template 5 is fixedly connected to the output end of the hydraulic cylinder 4. A punch head 6 is fixedly connected to the upper template 5. A return spring 7 is fixedly connected to the upper template 5, and a lower template 8 is fixedly connected to the return spring 7. A sliding rod is provided between the lower template 8 and the upper template 5. The return spring 7 is sleeved on the sliding rod. An upper mold 9 is provided on the lower template 8. The lower template 8 forms a sliding pair with the guide rod 2 through a linear bearing, allowing it to slide up and down along the guide rod 2. In its natural state, the return spring 7 acts on the lower template 8, placing it at its upper limit position. When the upper template 5 moves downward, it first compresses the return spring 7 and indirectly pushes the lower template 8 and the upper mold 9 downward together through the spring force to close the mold. This can act as a buffer to avoid hard impact on the mold. The lower mold 10 is provided on the base 1. The clamping assembly is provided on the base 1 and is used to provide clamping force to the lower mold 10. The fixing assembly is provided on the base 1 and is used to provide fixing force to the lower mold 10.

[0022] Reference Figures 1-3 The clamping assembly includes a cylinder 11 and a clamping plate 12. The cylinder 11 is fixed on the base 1, and the output end of the cylinder 11 is fixedly connected to the clamping plate 12. There are two sets of clamping assemblies, which are mirror images of each other on the base 1 to provide clamping force to the lower mold 10. The edge of the clamping plate 12 is rounded to avoid scratching the mold surface during clamping.

[0023] Reference Figures 2-4The lower mold 10 has a through hole 13, which provides a precise insertion channel for the positioning pin 15 to achieve positioning of the lower mold 10. The end of the through hole 13 is chamfered, which facilitates the quick insertion of the positioning pin 15 and reduces the assembly wear between the edge of the through hole 13 and the positioning pin 15. The base 1 has a mounting hole 14, which provides a stable mounting cavity for the fixing plate 16, telescopic spring 17 and other fixing components. The fixing components include several sets of positioning pins 15, several sets of fixing plates 16, several sets of telescopic springs 17 and several sets of discs 18. The multiple sets of positioning pins 15, fixing plates 16, telescopic springs 17 and discs 18 can be distributed and adapted and elastically adjusted to firmly fix the lower mold 10 of different volumes. The fixing plate 16 is fixed in the mounting hole 14. The fixing plate 16 provides axial guidance and installation support for the positioning pin 15. The positioning pin 15 passes through the fixing plate 16 and can flexibly slide along the through hole of the fixing plate 16. The disc 18 is fixed to the positioning pin 15. The disc 18 acts as the force-bearing carrier for the telescopic spring 17, transmitting the elastic preload. The two ends of the telescopic spring 17 are fixed to the fixing plate 16 and the disc 18, respectively. The telescopic spring 17 applies a continuous extension preload to the positioning pin 15 through elastic deformation. The telescopic spring 17 is sleeved on the positioning pin 15. The positioning pin 15 provides a central limit for the telescopic spring 17 to prevent the spring from shifting or twisting. The through hole 13 is adapted to the positioning pin 15. The diameter of the through hole 13 is consistent with the positioning pin 15. The pin 15 has a precise outer diameter match to achieve tight insertion and positioning. Both sides of the positioning pin 15 are provided with inclined surfaces 19. The inclined surfaces 19 provide a smooth contact guide surface for the clamping plate 12. The inclined surfaces 19 contact the positioning pin 15 when the clamping plate 12 approaches or moves away from it. The clamping plate 12 pushes the positioning pin 15 along the axis of the fixed plate 16 by fitting and pressing against the inclined surfaces 19, so that it naturally transitions into the interior of the mounting hole 14. This ensures that the positioning pin 15 retracts smoothly without jamming and without damaging the inner wall of the mounting hole 14.

[0024] Reference Figures 4-5The lower template 8 has an embedded groove 20, which provides a precise installation and positioning slot for the connecting block 21. The connecting block 21 is installed inside the embedded groove 20. The connecting block 21 supports the upper mold 9 and enables a detachable connection with the lower template 8. The embedded groove 20 and the connecting block 21 are adapted to each other, ensuring that the connecting block 21 does not loosen or shift after installation. Both the embedded groove 20 and the connecting block 21 are T-shaped. The T-shape enhances the connection stability and prevents the connecting block 21 from falling off. The upper mold 9 is fixed to the connecting block 21, which allows for quick disassembly and replacement of the upper mold 9. The connecting block 21 has an insertion hole 22, which provides a channel for the insertion and fixing of the insertion block 24. A folding plate 23 is hinged to the lower template 8. The folding plate 23 can be rotated around the hinge point to control the insertion and removal of the insertion block 24. A plug 24 is fixedly connected to the folding plate 23. After the plug 24 is inserted into the socket 22, it locks the position of the connecting block 21. The side of the plug 24 away from the folding plate 23 is provided with a chamfer. This chamfer facilitates the quick insertion of the plug 24 into the socket 22. The plug 24 and the socket 22 are inserted into each other. This insertion fits together to firmly fix the connecting block 21 and the lower template 8. A straight groove 27 is opened on the folding plate 23. The straight groove 27 provides a limiting and driving channel for the elongated plate 26. The lower template 8 is internally threaded with a screw 25. Rotating the screw 25 can drive the elongated plate 26 to move axially. The elongated plate 26 is fixedly connected to the screw 25. After the elongated plate 26 is rotated 90 degrees, it can lock the folding plate 23 by intersecting with the straight groove 27. The elongated plate 26 and the straight groove 27 are adapted to each other. This adaptation ensures that the folding plate 23 is fixed without loosening or displacement.

[0025] Working principle: First, the lower mold 10 is placed on the working plane of the base 1. At this time, under the pre-tightening force of the telescopic spring 17, the upper part of the positioning pin 15 protrudes from the upper surface of the base 1. The chamfer of the end of the through hole 13 at the bottom of the lower mold 10 contacts the inclined surface 19 at the top of the positioning pin 15, which plays a preliminary guiding role. Due to the weight of the lower mold 10 itself and the guiding effect, when it is placed in the correct position, it will naturally squeeze the positioning pin 15 to partially retract until the through hole 13 and the positioning pin 15 are aligned. Under the action of the telescopic spring 17, the positioning pin 15 quickly springs into the through hole 13, realizing the initial pre-positioning of the lower mold 10 on the base 1. This process ensures that the mold will not shift significantly during subsequent clamping. Then, the two sets of mirror settings are activated. The cylinder 11 pushes the clamping plate 12 to move towards the center. It should be noted that the inner contour of the clamping plate 12 is precisely designed, and its movement path is intended to ultimately clamp the side wall of the lower mold 10. In the initial stage of its movement stroke, it first contacts the inclined surface 19 on the fully ejected positioning pin 15. As the clamping plate 12 continues to advance, guided by the inclined surface 19, the clamping plate 12 completely presses the positioning pin 15 back into the mounting hole 14, overcoming the elastic force of the telescopic spring 17. When the clamping plate 12 passes the positioning pin 15, its final stroke segment will firmly clamp onto the side wall of the lower mold 10, providing a strong lateral clamping force. At this time, since the positioning pin 15 has been pressed back, the lower mold 10 is finally fixed by the clamping plates on both sides. The friction and clamping force provided by the 12 joints ensure that the main function of the positioning pin 15 has been achieved in the initial positioning completed before clamping, which prevents the mold from moving during the clamping process. The logic of positioning first and then clamping is a conventional design idea that can be understood by those skilled in the art. Then, the upper mold 9 is installed by sliding the connecting block 21 into the T-shaped insertion groove 20 until it can no longer move, thus achieving lateral limitation. Subsequently, the folding plate 23 is flipped downward so that the insert 24 on it is inserted into the insertion hole 22 of the connecting block 21. Finally, the screw 25 is rotated to drive the long cylindrical plate 26 at its end to move downward. After the long cylindrical plate 26 exits from the straight groove 27 of the folding plate 23, the screw 25 is rotated 90 degrees so that the long axis of the long cylindrical plate 26 is aligned with the straight groove 27. The length direction of the slot 27 is perpendicular. At this time, the flat part of the elongated plate 26 is in contact with the body surface of the folding plate 23. The folding plate 23 is locked by friction and structural interference to prevent it from accidentally flipping open, thus realizing the rapid and reliable installation of the upper mold 9. Finally, the mold closing casting operation is carried out. The hydraulic cylinder 4 is started to drive the upper template 5 to move downward along the guide rod 2 to close the mold. After the mold is closed, the cavity is formed. At this time, the hydraulic cylinder 4 can continue to provide holding pressure to ensure that the upper and lower molds are tightly fitted during the casting process. The punch head 6 is used as a punch for extrusion casting in this embodiment. After the molten metal is injected into the cavity, it can move downward to apply high pressure to the molten metal that has not yet solidified to improve the density and mechanical properties of the casting. After the operation is completed, the hydraulic cylinder 4 returns.The upper template 5, under the action of the return spring 7, drives the lower template 8 to reset. Then, the folding plate 23 is released sequentially, the upper mold 9 is removed, and the cylinder 11 is released, the lower mold 10 is removed, thus completing one work cycle.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A clamping and fixing device for casting molds, characterized in that: include A base (1) and a guide rod (2) fixedly connected to the base (1). A top plate (3) is fixedly connected to the guide rod (2). A hydraulic cylinder (4) is fixedly connected to the top plate (3). An upper template (5) is fixedly connected to the output end of the hydraulic cylinder (4). A punch head (6) is fixedly connected to the upper template (5). A return spring (7) is fixedly connected to the upper template (5). A lower template (8) is fixedly connected to the return spring (7). An upper mold (9) is provided on the lower template (8). A lower mold (10) is provided on the base (1). A clamping assembly is disposed on a base (1) and is used to provide clamping force to the lower mold (10); A fixing component is disposed on the base (1) and is used to provide a fixing force to the lower mold (10).

2. The casting mold clamping and fixing device according to claim 1, characterized in that: The clamping assembly includes a cylinder (11) and a clamping plate (12). The cylinder (11) is fixed on the base (1), and the output end of the cylinder (11) is fixedly connected to the clamping plate (12).

3. The casting mold clamping and fixing device according to claim 2, characterized in that: The clamping plate (12) has rounded corners at its edges.

4. The casting mold clamping and fixing device according to claim 1, characterized in that: The lower mold (10) has a through hole (13), and the base (1) has an installation hole (14). The fixing component includes several sets of positioning pins (15), several sets of fixing plates (16), several sets of telescopic springs (17) and several sets of discs (18). The fixing plate (16) is fixed in the installation hole (14). The positioning pin (15) passes through the fixing plate (16). The disc (18) is fixed on the positioning pin (15). The two ends of the telescopic spring (17) are fixed on the fixing plate (16) and the disc (18) respectively. The telescopic spring (17) is sleeved on the positioning pin (15). The through hole (13) is adapted to the positioning pin (15).

5. A casting mold clamping and fixing device according to claim 4, characterized in that: Both sides of the positioning pin (15) are provided with inclined surfaces (19).

6. The casting mold clamping and fixing device according to claim 4, characterized in that: The port of the through hole (13) is chamfered.

7. The casting mold clamping and fixing device according to claim 1, characterized in that: The lower template (8) has an embedded groove (20) and a connecting block (21) is provided in the embedded groove (20). The embedded groove (20) is adapted to the connecting block (21). The upper mold (9) is fixed on the connecting block (21). The connecting block (21) has an insertion hole (22). The lower template (8) is hinged with a folding plate (23). The folding plate (23) is fixedly connected with an insertion block (24). The folding plate (23) has a straight groove (27). The lower template (8) is threaded with a screw (25). The screw (25) is fixedly connected with an elongated plate (26). The elongated plate (26) is adapted to the straight groove (27).

8. A casting mold clamping and fixing device according to claim 7, characterized in that: Both the embedding groove (20) and the connecting block (21) are T-shaped.

9. A casting mold clamping and fixing device according to claim 7, characterized in that: The insert (24) has a chamfer on the side away from the folding plate (23).

10. A casting mold clamping and fixing device according to claim 7, characterized in that: The plug (24) is plugged into the socket (22).

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