Self-locking fixed type inner chill structure for aluminum alloy sand mold casting and using method of self-locking fixed type inner chill structure

Abstract

The invention discloses a self-locking fixing type aluminum alloy sand mold casting internal chill structure and a using method, the self-locking fixing type aluminum alloy sand mold casting internal chill structure comprises an internal chill body, two fixing structures and a baffle, mounting grooves for connecting locking rods are formed in the two sides of the internal chill body, and clamping assemblies for fixing the locking rods in the mounting grooves are mounted in the mounting grooves; the two fixing structures are mounted at the upper end of the mounting groove and are in contact connection with the locking rod, the baffle is mounted on one side of the internal chill body through a connecting part, and one side of the baffle is in contact connection with one end of the locking rod; the locking rod can be compressed and fixed in the mounting groove in the radial direction of the mounting groove, the situation that molding sand falls off due to friction between the locking rod and a sand mold is avoided, the mounting efficiency and quality of the inner chill body are greatly improved, the locking rod can be detached and replaced, cyclic utilization of the locking rod is achieved, meanwhile, the locking rod can be replaced after being damaged, and the service life of the inner chill body is prolonged. The service life of the internal chill body is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of sand casting, in particular to an inner chiller structure for self-locking fixed aluminum alloy sand casting and a use method thereof. Background Art

[0002] Sand casting refers to a casting method that produces castings in sand molds. Steel, iron and most non-ferrous alloy castings can be obtained by sand casting. In aluminum alloy sand casting, the design of the internal cooling iron structure is to increase the local cooling rate of the casting, thereby controlling the solidification sequence of the casting, reducing defects such as shrinkage cavities and shrinkage, and improving the quality of the casting.

[0003] In the related art, in aluminum alloy casting products, the use of inner cooling iron in sand mold is one of the important process means to improve the quality of castings in sand casting, and is particularly suitable for the production of high-quality aluminum alloy products. The main reason is that the use of inner cooling iron can control the solidification sequence to achieve sequential solidification, thereby reducing the internal defects of the castings, preventing shrinkage cavities and shrinkage, improving the density of the castings, improving the quality of the castings, reducing internal defects (such as pores, inclusions, etc.), refining the grains, improving the mechanical properties of the castings, eliminating thermal stress and preventing the generation of cracks, etc. However, the use of inner cooling iron often requires precise design and control, and the key and difficulty lies in the precise placement and fixed support issues, because the inner cooling iron needs to be accurately placed in the correct position of the sand mold to ensure uniform cooling and solidification of the castings. At the same time, the inner cooling iron needs to be properly fixed and supported in the sand mold to prevent displacement during pouring and solidification. Therefore, we need to propose a self-locking fixed inner cooling iron structure and use method for aluminum alloy sand casting. Summary of the invention

[0004] The purpose of the present invention is to provide a self-locking fixed inner chiller structure and use method for aluminum alloy sand casting, which has the advantages that the inner chiller can be accurately and conveniently supported and fixed in the position inside the sand mold, reducing the difficulty of use and improving the production rhythm, so as to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A self-locking fixed inner chiller structure for aluminum alloy sand casting, comprising an inner chiller body, both sides of which are provided with mounting grooves for connecting a locking rod, and a clamping assembly for fixing the locking rod in the mounting groove is installed in the mounting groove;

[0007] Two fixing structures, the two fixing structures are installed at the upper ends of the installation slots, and the two fixing structures are in contact with and connected to the locking rods; and:

[0008] A baffle is installed on one side of the inner cold iron body through a connecting portion, and one side of the baffle is in contact and connected with one end of the locking rod.

[0009] Through the setting of the above scheme, the connecting part is first disassembled, and then the baffle is removed, the fixed structure is rotated to a horizontal (i.e., open) position, and then the locking rod is placed in the installation groove. At this time, the fixed structure is rotated again to contact and connect with the locking rod. This process fixes the locking rod; the clamping assembly squeezes and fixes the locking rod in the groove body, and then the connecting part is used to install the baffle on one side of the inner cold iron body.

[0010] Preferably, the clamping assembly includes an arc-shaped clamping plate and a plurality of high-strength spring sheets, the plurality of high-strength spring sheets are fixedly installed in the installation groove, and the arc-shaped clamping plate is welded to the middle portions of the plurality of high-strength spring sheets.

[0011] Through the setting of the above scheme, the high-strength spring sheet can release elastic potential energy to connect the locking rod with the inner wall of the mounting groove, and the locking rod can be compressed along the radial direction of the mounting groove, that is, the natural state of the locking rod is lifted by the high-strength spring sheet, and it can be compressed into the groove body and the groove body under the action of elasticity.

[0012] Preferably, the fixing structure includes a threaded rod, a clamping plate and an adjusting nut, the threaded rod is fixedly welded to one end of the inner cold iron body, one end of the clamping plate is rotatably connected to the adjusting threaded rod, the adjusting nut is connected to the threaded rod, and the adjusting nut is in contact with one end of the clamping plate for fixing the locking rod.

[0013] Through the setting of the above scheme, the adjusting nut is rotated, and then the clamping plate is rotated according to the demand, the clamping plate is contacted and connected with the locking rod, and then the adjusting nut is rotated to fix one end of the clamping plate. The clamping plate can further increase the fixing effect of the locking rod.

[0014] Preferably, a sponge layer is provided on one side of the clamping plate, the sponge layer is in contact with the locking rod, L-shaped blocks are fixedly welded on both sides of the inner cold iron body, and one end of the clamping plate is engaged in the L-shaped block to limit one end of the clamping plate.

[0015] Through the setting of the above scheme, the sponge layer can reduce the wear on the locking rod when the clamping plate fixes the locking rod. The end of the clamping plate away from the threaded rod is engaged in the L-shaped block, which can fix the clamping plate and increase the fixing effect of the locking rod.

[0016] Preferably, the inner chiller body structure is trapezoidal, and the inner chiller body is made of aluminum alloy.

[0017] By setting the above scheme, the trapezoidal internal cooling iron body can better contact the inside of the casting due to its shape characteristics, especially in the area that needs rapid cooling. Aluminum alloy material has good thermal conductivity and can quickly conduct heat from the inside of the casting, thereby shortening the solidification time of the casting.

[0018] Preferably, the fixing structure includes a knob plate, one end of which is rotatably connected to one end of the inner chiller body, and the knob plate is in contact with the locking rod.

[0019] Through the arrangement of the above solution, the locking rod can be fixed by rotating one end of the knob plate.

[0020] Preferably, the connecting portion includes two mounting bolts, the two mounting bolts are mounted on the baffle, a threaded hole for threaded connection of the two mounting bolts is opened on one side of the inner chiller body, and a limiting portion is provided between the baffle and the inner chiller body.

[0021] Through the arrangement of the above scheme, the baffle can be fixedly mounted on one end of the inner cooling iron body by connecting with the mounting bolts and the threaded holes.

[0022] Preferably, the limiting portion includes two limiting blocks, a limiting groove is provided on one side of the inner chiller body, and the two limiting blocks are engaged in the limiting groove to quickly connect the baffle plate to one side of the inner chiller body.

[0023] Through the arrangement of the above scheme, when the baffle is connected to one end of the inner cooling iron body, the limit block is engaged in the limit groove, and the mounting bolt can be quickly aligned with the threaded hole, thereby increasing the installation efficiency of the baffle.

[0024] Preferably, the baffle is provided with two grooves for the mounting bolts to engage with, and the mounting bolts are sleeved with rubber pads that are in contact with the grooves.

[0025] By setting the above-mentioned scheme and the groove, the protrusion of the mounting bolt can be avoided, the wear and loosening of the mounting bolt can be reduced, and the stability of the mounting bolt can be further increased by setting the rubber pad.

[0026] A method for using a self-locking fixed internal cooling iron structure for aluminum alloy sand casting, comprising the following steps:

[0027] S1. Screen high silica sand (silicon dioxide content 99.8%) and control the particle size to 70-140 mesh;

[0028] S2. Add one part of silica sand and 0.003-0.005 part of sulfonic acid into the mixer, rotate at 80 rpm / min, heat to 50-60°C, mix for 3-5 hours and set aside;

[0029] S3, placing the molding sand mixed with the curing agent and the furan resin in the powder supply cabin and ink cartridge of the binder injection sand molding equipment respectively, loading the sand mold printing data into the industrial computer, starting the equipment to start the sand mold preparation until the preparation is completed;

[0030] S4, move the molding chamber to the drying room and let it stand for 3-5 hours for curing. After the curing is completed, take out the sand mold and move it to the cleaning room to clean the sand mold;

[0031] S5. Install the inner chiller body of corresponding size specifications according to the position on the drawing. It is worth noting that when installing the inner chiller body, remove the mounting bolts, then remove the baffle, and then try to press the two locking rods into the mounting groove by hand. The high-strength spring sheet can release elastic potential energy to connect the locking rods with the inner wall of the mounting groove, and then use the mounting bolts to connect with the threaded holes, fix the baffle on one side of the inner chiller body, and then use the fixing structure to further fix the locking rod, and then put it into the corresponding installation position. The purpose is to avoid the friction between the locking rod and the sand mold during the installation process, causing the sand to fall off, or the inner chiller body to loosen after installation.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. The present invention can compress and fix the locking rod in the installation groove along the radial direction of the installation groove by setting the clamping assembly, so as to prevent the friction between the locking rod and the sand mold and cause the molding sand to fall off.

[0034] 2. The present invention can further increase the fixing effect of the locking rod and the stability of the inner chiller body by setting a fixing structure, so that the inner chiller body can be installed in a self-locking manner, which greatly improves the installation efficiency and quality of the inner chiller body.

[0035] 3. The present invention can install the baffle on one side of the inner cooling iron body through the setting of the connecting part, and fix the locking rod in the installation groove. The baffle can be removed by disassembling the connecting part, so that the locking rod can be disassembled and replaced, which can be recycled. At the same time, the locking rod can be replaced after damage, thereby extending the service life of the inner cooling iron body. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of the present invention;

[0037] Figure 2 This is one of the explosion structure schematic diagrams of the present invention;

[0038] Figure 3 This is the second schematic diagram of the explosion structure of the present invention;

[0039] Figure 4 It is a cross-sectional structural schematic diagram of the present invention;

[0040] Figure 5 It is a schematic structural diagram of another embodiment of the present invention.

[0041] In the figure: 1. inner cooling iron body; 2. locking rod; 3. mounting groove; 4. baffle; 5. arc clamping plate; 6. high-strength spring sheet; 7. threaded rod; 8. clamping plate; 9. adjusting nut; 10. L-shaped block; 11. sponge layer; 12. knob plate; 13. mounting bolt; 14. threaded hole; 15. limit block; 16. limit groove; 17. groove; 18. rubber pad. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Embodiment 1:

[0044] See also Figure 1 , the present invention provides a technical solution:

[0045] A self-locking fixed inner chiller structure for aluminum alloy sand casting, comprising an inner chiller body 1, the inner chiller body 1 is trapezoidal in structure, and the inner chiller body 1 is made of aluminum alloy material. The inner chiller body 1 with a trapezoidal structure can better contact with the inside of the casting due to its shape characteristics, especially in areas where rapid cooling is required. The aluminum alloy material has good thermal conductivity and can quickly conduct heat from the inside of the casting, thereby shortening the solidification time of the casting;

[0046] refer to Figure 3 and Figure 4 , mounting grooves 3 for connecting the locking rod 2 are provided on both sides of the inner chiller body 1, and a clamping assembly for fixing the locking rod 2 in the mounting groove 3 is installed in the mounting groove 3;

[0047] Specifically, the clamping assembly includes an arc-shaped clamping plate 5 and a plurality of high-strength spring sheets 6. The plurality of high-strength spring sheets 6 are fixedly installed in the installation groove 3, and the arc-shaped clamping plate 5 is welded to the middle parts of the plurality of high-strength spring sheets.

[0048] The high-strength spring sheet 6 can release elastic potential energy to connect the locking rod 2 to the inner wall of the mounting groove 3. The locking rod 2 can be compressed along the radial direction of the mounting groove 3, that is, the natural state of the locking rod 2 is to be lifted by the high-strength spring sheet 6, and can be compressed into the groove body and the groove body under the action of elasticity.

[0049] refer to Figures 1 to 4 , two fixing structures are installed at the upper end of the mounting groove 3, and the two fixing structures are in contact with and connected to the locking rod 2;

[0050] Furthermore, the fixing structure includes a threaded rod 7, a clamping plate 8 and an adjusting nut 9. The threaded rod 7 is fixedly welded to one end of the inner chilled iron body 1. One end of the clamping plate 8 is rotatably connected to the adjusting threaded rod 7. The adjusting nut 9 is connected to the threaded rod 7, and the adjusting nut 9 is in contact with one end of the clamping plate 8 to fix the locking rod 2. A sponge layer 11 is provided on one side of the clamping plate 8, and the sponge layer 11 is in contact with the locking rod 2. L-shaped blocks 10 are fixedly welded on both sides of the inner chilled iron body 1, and one end of the clamping plate 8 is engaged in the L-shaped block 10 to limit one end of the clamping plate 8.

[0051] Turn the adjusting nut 9, and then turn the clamping plate 8 as needed. The clamping plate 8 is in contact with the locking rod 2, and then the adjusting nut 9 is turned to fix one end of the clamping plate 8. The clamping plate 8 can further increase the fixing effect of the locking rod 2. The end of the clamping plate 8 away from the threaded rod 7 is engaged in the L-shaped block 10, which can fix the clamping plate 8 and increase the fixing effect of the locking rod 2 to avoid the displacement of the inner chiller 1 body during the casting or solidification process. The sponge layer 11 can reduce the wear on the locking rod when the clamping plate 8 fixes the locking rod 2.

[0052] refer to Figure 2 and Figure 3 The baffle plate 4 is installed on one side of the inner chiller body 1 through a connecting portion, and one side of the baffle plate 4 is in contact with one end of the locking rod 2. The connecting portion includes two mounting bolts 13, and the two mounting bolts 13 are installed on the baffle plate 4. A threaded hole 14 for threaded connection of the two mounting bolts 13 is opened on one side of the inner chiller body 1, and a limiting portion is provided between the baffle plate 4 and the inner chiller body 1. The mounting bolts 13 are connected to the threaded hole 14, so that the baffle plate 4 can be fixedly installed on one end of the inner chiller body 1.

[0053] When the baffle plate 4 is fixedly installed on one side of the inner chiller body 1 , the mounting bolts 13 are connected with the threaded holes 14 , so that the baffle plate 4 can be fixedly installed on one end of the inner chiller body 1 , and the baffle plate 4 fixes the locking rod 2 in the mounting groove 3 .

[0054] On the basis of the above embodiment, the limiting part includes two limiting blocks 15 , and a limiting groove 16 is provided on one side of the inner chiller body 1 . The two limiting blocks 15 are engaged in the limiting groove 16 to quickly connect the baffle 4 to one side of the inner chiller body 1 .

[0055] When the baffle plate 4 is connected to one end of the inner chiller body 1 , the limiting block 15 is engaged in the limiting groove 16 , so that the mounting bolt 13 can be quickly aligned with the threaded hole 14 , thereby increasing the installation efficiency of the baffle plate 4 .

[0056] Furthermore, two grooves 17 for the mounting bolts 13 to engage are formed on the baffle plate 4 , and a rubber pad 18 is sleeved on the mounting bolt 13 and is in contact with the grooves 17 .

[0057] The groove 17 can prevent the mounting bolt 13 from protruding, thereby reducing wear and loosening of the mounting bolt 13 . The rubber pad 18 can further increase the stability of the mounting bolt 13 .

[0058] Embodiment 2:

[0059] refer to Figure 5 The difference between the second embodiment and the first embodiment lies in the difference in the fixing structure:

[0060] The fixing structure includes a knob plate 12, one end of which is rotatably connected to one end of the inner chiller body 1, and the knob plate 12 is in contact with the locking rod 2. The locking rod 2 can be fixed by rotating one end of the knob plate 12.

[0061] Embodiment 3:

[0062] The difference between this embodiment 3 and the embodiments 1 and 2 is that: this embodiment also provides a method for using a self-locking fixed internal chiller structure for aluminum alloy sand casting, including the following method steps:

[0063] S1. Screen high silica sand (silicon dioxide content 99.8%) and control the particle size to 70-140 mesh;

[0064] S2. Add one part of silica sand and 0.003-0.005 part of sulfonic acid into the mixer, rotate at 80 rpm / min, heat to 50-60°C, mix for 3-5 hours and set aside;

[0065] S3, placing the molding sand mixed with the curing agent and the furan resin in the powder supply cabin and ink cartridge of the binder injection sand molding equipment respectively, loading the sand mold printing data into the industrial computer, starting the equipment to start the sand mold preparation until the preparation is completed;

[0066] S4, move the molding chamber to the drying room and let it stand for 3-5 hours for curing. After the curing is completed, take out the sand mold and move it to the cleaning room to clean the sand mold;

[0067] S5. Install the inner chiller body 1 of corresponding size specifications according to the position on the drawing. It is worth noting that when installing the inner chiller body 1, remove the mounting bolts 13, then remove the baffle 4, and then try to press the two locking rods 2 into the mounting groove 3 by hand. The high-strength spring sheet 6 can release elastic potential energy to contact and connect the locking rod 2 with the inner wall of the mounting groove 3, and then use the mounting bolts 13 to connect with the threaded hole 14, and fix the baffle 4 on one side of the inner chiller body 1. Then use the fixing structure to further fix the locking rod 2, and then put it into the corresponding installation position. The purpose is to avoid the friction between the locking rod 2 and the sand mold during the installation process, causing the molding sand to fall off, or the inner chiller body 1 to become loose after installation.

[0068] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-locking fixed inner chiller structure for aluminum alloy sand casting, comprising an inner chiller body (1), Features: The inner cooling iron body (1) is provided with mounting grooves (3) for connecting the locking rod (2), and the mounting grooves (3) are provided with clamping components for fixing the locking rod (2) in the mounting grooves (3); Two fixing structures, the two fixing structures are installed at the upper ends of the installation grooves (3), and the two fixing structures are in contact and connection with the locking rods (2); and: A baffle (4) is installed on one side of the inner cold iron body (1) through a connecting portion, and one side of the baffle (4) is in contact and connected with one end of the locking rod (2).

2. A self-locking fixed inner chiller structure for aluminum alloy sand casting according to claim 1, Features: The clamping assembly comprises an arc-shaped clamping plate (5) and a plurality of high-strength spring sheets (6); the plurality of high-strength spring sheets (6) are fixedly installed in the installation groove (3), and the arc-shaped clamping plate (5) is welded to the middle parts of the plurality of high-strength spring sheets.

3. The self-locking fixed inner chiller structure for aluminum alloy sand casting according to claim 1, Features: The fixing structure comprises a threaded rod (7), a clamping plate (8) and an adjusting nut (9); the threaded rod (7) is fixedly welded to one end of the inner cold iron body (1); one end of the clamping plate (8) is rotatably connected to the adjusting threaded rod (7); the adjusting nut (9) is connected to the threaded rod (7); and the adjusting nut (9) is contact-connected to one end of the clamping plate (8) for fixing the locking rod (2).

4. The self-locking fixed inner chiller structure for aluminum alloy sand casting according to claim 3, Features: A sponge layer (11) is provided on one side of the clamping plate (8), and the sponge layer (11) is in contact with and connected to the locking rod (2). L-shaped blocks (10) are fixedly welded on both sides of the inner cold iron body (1), and one end of the clamping plate (8) is engaged in the L-shaped block (10) to limit the position of one end of the clamping plate (8).

5. The self-locking fixed inner chiller structure for aluminum alloy sand casting according to claim 1, Features: The inner cooling iron body (1) has a trapezoidal structure, and is made of an aluminum alloy material.

6. The self-locking fixed inner chiller structure for aluminum alloy sand casting according to claim 1, Features: The fixing structure comprises a knob plate (12), one end of which is rotatably connected to one end of the inner cold iron body (1), and the knob plate (12) is in contact with and connected to the locking rod (2).

7. The self-locking fixed inner chiller structure for aluminum alloy sand casting according to claim 1, Features: The connecting portion comprises two mounting bolts (13), the two mounting bolts (13) being mounted on the baffle plate (4), a threaded hole (14) for threaded connection of the two mounting bolts (13) being provided on one side of the inner chiller body (1), and a limiting portion being provided between the baffle plate (4) and the inner chiller body (1).

8. The self-locking fixed inner chiller structure for aluminum alloy sand casting according to claim 7, Features: The limiting portion comprises two limiting blocks (15), a limiting groove (16) is provided on one side of the inner chiller body (1), and the two limiting blocks (15) are engaged in the limiting groove (16) to quickly connect the baffle plate (4) to one side of the inner chiller body (1).

9. The self-locking fixed inner chiller structure for aluminum alloy sand casting according to claim 8, Features: The baffle (4) is provided with two grooves (17) for engaging with the mounting bolts (13), and the mounting bolts (13) are sleeved with rubber pads (18) that are in contact with the grooves (17).

10. A method for using a self-locking fixed internal cooling iron structure for aluminum alloy sand casting, It is characterized in that The method comprises the following steps: S1. Screen high silica sand (silicon dioxide content 99.8%) and control the particle size to 70-140 mesh; S2. Add one part of silica sand and 0.003-0.005 part of sulfonic acid into the mixer, rotate at 80 rpm / min, heat to 50-60°C, mix for 3-5 hours and set aside; S3, placing the molding sand mixed with the curing agent and the furan resin in the powder supply cabin and ink cartridge of the binder injection sand molding equipment respectively, loading the sand mold printing data into the industrial computer, starting the equipment to start the sand mold preparation until the preparation is completed; S4, move the molding chamber to the drying room and let it stand for 3-5 hours for curing. After the curing is completed, take out the sand mold and move it to the cleaning room to clean the sand mold; S5. Install the inner cooling iron body (1) of corresponding size specifications according to the position on the drawing. It is worth noting that when installing the inner cooling iron body (1), remove the mounting bolts (13), then remove the baffle (4), and then try to press the two locking rods (2) into the mounting groove (3) by hand. The high-strength spring sheet (6) can release elastic potential energy to contact and connect the locking rod (2) with the inner wall of the mounting groove (3), and then use the mounting bolts (13) to connect with the threaded hole (14), and fix the baffle (4) on one side of the inner cooling iron body (1). Then use the fixing structure to further fix the locking rod (2), and then put it into the corresponding installation position. The purpose is to avoid the locking rod (2) rubbing against the sand mold during the installation process, causing the molding sand to fall off, or the inner cooling iron body (1) to become loose after installation.

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