Die for reducing surface defects of machine tool casting

Abstract

The utility model discloses a mould for reducing surface defects of machine tool castings, which comprises a bottom plate, limiting columns are fixedly connected to the top of the bottom plate close to the left side and the right side, and the positions of the outer surfaces of the limiting columns close to the bottom are movably sleeved with a bottom mould. The positions, close to the front face and the back, of the top of the bottom plate are fixedly connected with first communicating blocks, the sides, close to the center of the bottom plate, of the first communicating blocks are fixedly connected with first atomizing nozzles, and the positions, close to the first atomizing nozzles, of the outer surfaces of the first communicating blocks are fixedly connected with second atomizing nozzles. Second communicating blocks are arranged on the front faces and the back faces of the limiting columns correspondingly, and a top mold is arranged on the top of the bottom mold. According to the casting mold, the bottom mold and the top mold are arranged, so that the burr removal difficulty is reduced, and the possibility that defects possibly appear on the surface of a casting in the burr removal process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tool casting, in particular to a mold for reducing surface defects of machine tool castings. Background Art

[0002] Machine tool casting molds are mainly tools used to cast metal parts. Their main function is to shape the molten metal during the casting process so that it solidifies into a workpiece of the desired shape. Through the use of molds, manual operations can be greatly reduced, the degree of production automation can be improved, production costs can be reduced, and production efficiency can be improved.

[0003] At present, during the use of existing machine tool casting molds, some defects will appear on the surface of the casting after demolding due to various reasons, such as some internal exhaust problems, deformation caused by uneven cooling, etc., which will cause defects on the mold surface and may lead to a decrease in the strength and durability of the casting, reduce its bearing capacity and service life, and seriously directly affect the normal operation of the equipment or products. Utility Model Content

[0004] The utility model aims to solve the problem of internal exhaust after pouring and the problem of uneven cooling during cooling in the prior art, and proposes a mold for reducing surface defects of machine tool castings.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A mold for reducing surface defects of machine tool castings, comprising a base plate, wherein the top of the base plate is fixedly connected to limiting columns near the left and right sides, the outer surfaces of the limiting columns are movably connected to the bottom mold near the bottom, the top of the base plate is fixedly connected to a first connecting block near the front and back, the first connecting block is fixedly connected to a first atomizing nozzle on one side near the center of the base plate, the outer surface of the first connecting block is fixedly connected to a second atomizing nozzle near the first atomizing nozzle, the second atomizing nozzle is located at the top of the top mold and is equidistantly distributed in an array, the front and back of the limiting columns are both provided with second connecting blocks, the top of the bottom mold is provided with a top mold, the connection line between the bottom mold and the top mold is located at a flat position, pouring ports are provided on the left and right sides of the top of the top mold near the back, and a closing plate is provided on the top of the top mold.

[0007] Preferably, a second exhaust hole is opened at the top of the top mold near the front, and a first exhaust hole is opened at the inner side of the top of the top mold near the edge. The inner sides of the first exhaust hole and the second exhaust hole are movably sleeved with sealing columns, and the top of the sealing columns is fixedly connected to the closing plate.

[0008] Preferably, the bottom mold is fixedly connected to a bottom sealing block near the top corner, the bottom of the top mold is fixedly connected to a top sealing block near the top corner, the top of the top sealing block is threadedly connected to a fixing bolt, the bottom of the bottom sealing block is fixedly connected to a nut, and the fixing bolt is threadedly connected to the nut.

[0009] Preferably, the bottom of the second connecting block is fixedly connected to the bottom plate, and a third atomizing nozzle is fixedly connected to one side of the second connecting block close to the center of the bottom plate.

[0010] Preferably, a support column is fixedly connected to a position near the middle of the bottom of the closing plate, and the bottom of the support column fits with a position near the center of the top of the top mold.

[0011] Preferably, when the bottom of the support column fits with the top of the top mold, the bottom of the sealing column at the bottom of the closing plate is flush with the inner bottom of the first exhaust hole and the second exhaust hole.

[0012] Compared with the prior art, the utility model provides a mold for reducing surface defects of machine tool castings, which has the following beneficial effects:

[0013] 1. The mold for reducing surface defects of machine tool castings is provided with a bottom mold and a top mold. Generally, in order to quickly demold, the connecting line of the mold is designed on the parting line of the mold, but this will result in burrs near the parting line of the casting after demolding, and these burrs are located at the parting position of the casting, which is troublesome to remove. The removal process may cause defects on the casting surface. By providing the position of the connecting line between the bottom mold and the top mold, the connecting line is staggered from the parting line of the casting, so that the burrs are located in a relatively flat position after the casting is taken out later, making it easier to remove the burrs, thereby reducing the possibility of defects on the casting surface caused by the burr removal process.

[0014] 2. The mold for reducing surface defects of machine tool castings is provided with a first exhaust hole and a second exhaust hole. The first exhaust hole is provided at a position where, during the pouring process, bubbles are likely to appear at some corners or some higher positions. The first exhaust hole and the second exhaust hole are provided to remove the bubbles generated during the pouring process as much as possible, further reducing the possibility of defects on the casting surface. The equipment adopts a first atomizing nozzle, a second atomizing nozzle and a third atomizing nozzle, which can evenly cool the mold surface, improve the effect of the casting after demolding, and help reduce the possibility of defects on the casting surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of a mold for reducing surface defects of machine tool castings proposed by the utility model;

[0016] Figure 2 The utility model is a schematic diagram of a top sealing block of a mold for reducing surface defects of machine tool castings.

[0017] Figure 3 The utility model is a schematic diagram of a top mold of a mold for reducing surface defects of machine tool castings.

[0018] Figure 4 The utility model is a schematic diagram of a closing plate of a mold for reducing surface defects of machine tool castings.

[0019] In the figure: 1. bottom plate; 2. limiting column; 3. first connecting block; 4. first atomizing nozzle; 5. second atomizing nozzle; 6. bottom mold; 7. top mold; 8. third atomizing nozzle; 9. second connecting block; 10. bottom sealing block; 11. fixing bolt; 12. closing plate; 13. pouring gate; 14. top sealing block; 15. supporting column; 16. sealing column; 17. nut; 18. first exhaust hole; 19. second exhaust hole. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0022] Reference Figure 1-4, a mold for reducing surface defects of machine tool castings, comprising a bottom plate 1, a limiting column 2 is fixedly connected to the top of the bottom plate 1 near the left and right sides, the outer surface of the limiting column 2 is movably connected to the bottom mold 6 near the bottom, a first connecting block 3 is fixedly connected to the top of the bottom plate 1 near the front and back, a first atomizing nozzle 4 is fixedly connected to the first connecting block 3 on one side near the center of the bottom plate 1, a second atomizing nozzle 5 is fixedly connected to the outer surface of the first connecting block 3 near the first atomizing nozzle 4, the second atomizing nozzle 5 adopts this distribution method mainly to provide support stability, a second connecting block 9 is provided on the front and back of the limiting column 2, the bottom of the second connecting block 9 is fixedly connected to the bottom plate 1, a third atomizing nozzle 8 is fixedly connected to the second connecting block 9 on one side near the center of the bottom plate 1, the first atomizing nozzle 4, the second atomizing nozzle 5 and the third The atomizing nozzle 8 is provided to evenly cool the mold surface to ensure that the temperature of the casting is evenly distributed during the solidification process, and to avoid surface defects such as cracks and bubbles caused by excessive temperature gradients. A top mold 7 is provided on the top of the bottom mold 6, and the connecting line between the bottom mold 6 and the top mold 7 is designed in a flat place, which is convenient for removing burrs after the casting is taken out later. A pouring port 13 is provided on the left and right sides of the top of the top mold 7 near the back, and a closing plate 12 is mounted on the top of the top mold 7. A support column 15 is fixedly connected to the bottom of the closing plate 12 near the middle. When the bottom of the support column 15 is in contact with the top of the top mold 7, the bottom of the sealing column 16 at the bottom of the closing plate 12 is flush with the inner bottom of the first exhaust hole 18 and the second exhaust hole 19, and the bottom of the support column 15 is in contact with the top of the top mold 7 near the center.

[0023] Reference Figure 2-4 Described, the top of the top mold 7 is provided with a second exhaust hole 19 near the front, the second exhaust hole 19 is located near the top of the mold and at the transition, which is convenient for the discharge of bubbles during pouring, the top inner side of the top of the top mold 7 is provided with a first exhaust hole 18 near the edge, the first exhaust hole 18 is located at the transition of the mold, which is convenient for the discharge of bubbles, the inner sides of the first exhaust hole 18 and the second exhaust hole 19 are both movably sleeved with a sealing column 16, the top of the sealing column 16 is fixedly connected to the closing plate 12, the bottom mold 6 is fixedly connected to a bottom sealing block 10 near the top corner, the bottom of the top mold 7 is fixedly connected to a top sealing block 14 near the top corner, the top of the top sealing block 14 is threadedly connected to a fixing bolt 11, the bottom of the bottom sealing block 10 is fixedly connected to a nut 17, and the fixing bolt 11 is threadedly connected to the nut 17.

[0024] In the utility model, when using, the user can first spray lubricating oil on the inside of the bottom mold 6 and the top mold 7, preheat the bottom mold 6 and the top mold 7, and then fix the position of the bottom mold 6 by the limit column 2. After the position of the bottom mold 6 is fixed, the first connecting block 3 and the second connecting block 9 can be connected to the coolant delivery pipeline, and then the position of the top mold 7 is determined by the bottom sealing block 10 and the top sealing block 14, and then the bottom mold 6 and the top mold 7 are closed and fixed by the fixing bolts 11 and the nuts 17, and then the pouring port 13 is opened. Casting is carried out. During this process, the air is exhausted through the first exhaust hole 18 and the second exhaust hole 19 to avoid bubbles in the mold. After the exhaust is completed, the closing plate 12 can be fixed through the positions of the first exhaust hole 18 and the second exhaust hole 19. The support column 15 plays a supporting role. The surface of the mold is cooled by the first atomizing nozzle 4, the second atomizing nozzle 5 and the third atomizing nozzle 8. The mold can be cooled more comprehensively by the first atomizing nozzle 4, the second atomizing nozzle 5 and the third atomizing nozzle 8, thereby reducing the possibility of defects in the mold after demolding.

[0025] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. A mold for reducing surface defects of machine tool castings, comprising a base plate (1), characterized in that: The top of the bottom plate (1) is fixedly connected to a limiting column (2) near the left and right sides; the outer surface of the limiting column (2) is movably connected to the bottom mold (6) near the bottom; the top of the bottom plate (1) is fixedly connected to a first connecting block (3) near the front and back sides; the first connecting block (3) is fixedly connected to a first atomizing nozzle (4) on one side near the center of the bottom plate (1); the outer surface of the first connecting block (3) is fixedly connected to a second atomizing nozzle (5) near the first atomizing nozzle (4); the front and back sides of the limiting column (2) are both provided with a second connecting block (9); the top of the bottom mold (6) is provided with a top mold (7); the top left and right sides of the top of the top mold (7) are provided with pouring ports (13) near the back sides; and the top of the top mold (7) is provided with a closing plate (12).

2. A mold for reducing surface defects of machine tool castings according to claim 1, characterized in that: A second exhaust hole (19) is provided at a position near the front of the top of the top mold (7), and a first exhaust hole (18) is provided at a position near the edge of the inner side of the top of the top mold (7). The inner sides of the first exhaust hole (18) and the second exhaust hole (19) are both movably sleeved with a sealing column (16), and the top of the sealing column (16) is fixedly connected to the closing plate (12).

3. A mold for reducing surface defects of machine tool castings according to claim 1, characterized in that: A bottom sealing block (10) is fixedly connected to a position near the top corner of the bottom mold (6); a top sealing block (14) is fixedly connected to a position near the top corner of the bottom of the top mold (7); a fixing bolt (11) is threadedly connected to the top of the top sealing block (14); a nut (17) is fixedly connected to the bottom of the bottom sealing block (10); and the fixing bolt (11) is threadedly connected to the nut (17).

4. A mold for reducing surface defects of machine tool castings according to claim 1, characterized in that: The bottom of the second connecting block (9) is fixedly connected to the bottom plate (1), and a third atomizing nozzle (8) is fixedly connected to one side of the second connecting block (9) close to the center of the bottom plate (1).

5. A mold for reducing surface defects of machine tool castings according to claim 1, characterized in that: A support column (15) is fixedly connected to a position near the middle of the bottom of the closing plate (12), and the bottom of the support column (15) fits with a position near the center of the top of the top mold (7).

6. A mold for reducing surface defects of machine tool castings according to claim 5, characterized in that: When the bottom of the support column (15) fits with the top of the top mold (7), the bottom of the sealing column (16) at the bottom of the closing plate (12) is flush with the inner bottom of the first exhaust hole (18) and the second exhaust hole (19).

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