A casting mold for machining a machine tool base

Abstract

The present invention discloses a casting mold for machining a machine tool base, comprising a mold body, including a group of iron shells, a corresponding molding cavity is arranged on the iron shells, and a corresponding sand box is covered in the molding cavity; a buckle mechanism is used to lock and fix a group of the iron shells; an exhaust mechanism comprises an exhaust hole arranged on the iron shells, an abutting ball is movably arranged in the exhaust hole, and a pressure plate with a filter hole is fixedly connected to the upper part of the abutting ball upward through a spiral spring, a group of tightening support columns connected by hot melt adhesive are arranged inside the spiral spring, and a three-way pipe is detachably installed on the exhaust hole; an exhaust mechanism comprises an exhaust piston movably arranged at both ends of the three-way pipe, corresponding compression springs are respectively squeezed and installed between the exhaust pistons, and metal wires are fixedly connected between the exhaust pistons. The present invention can discharge the gas generated by the thermal decomposition of organic matter in the sand coating to prevent defects such as pores and depressions from occurring in the casting.

Description

Technical Field

[0001] The invention relates to the technical field of machine tool base casting processing, in particular to a casting mold for machine tool base processing. Background Art

[0002] The machine tool base is one of the basic components of CNC machine tools. At present, the machine tool base is mainly processed by casting. With the improvement of casting technology, the iron mold sand casting process has begun to be widely used in the casting process of machine tool bases.

[0003] The existing casting mold for the casting processing of the machine tool base mainly includes a group of iron shells with a cavity and a sand box arranged in the cavity of the iron shell. After the iron shells are molded together, the sand box arranged in the iron shell is combined to form a workpiece casting cavity of the machine tool base. Since some organic materials are needed in the sand box during the sand coating process, these organic materials will produce gas when they are decomposed by heat. Due to the poor exhaust performance of the iron mold sand box, it is easy to cause the gas to fail to be discharged from the iron shell in time and remain in the casting, thereby causing defects such as pores and depressions in the casting. In severe cases, it may even cause the casting to be scrapped.

[0004] Therefore, the purpose of this invention is to design a casting mold for machine tool base processing that can effectively discharge the gas generated by the thermal decomposition of organic matter in the sand coating without affecting the casting process, thereby preventing defects such as pores and depressions in the casting. Summary of the invention

[0005] In view of the technical problems existing in the above-mentioned prior art, the present invention provides a casting mold for machining a machine tool base, which can effectively solve the technical problems existing in the above-mentioned prior art.

[0006] The technical solution of the present invention is:

[0007] A casting mold for machining a machine tool base, comprising

[0008] The mold body comprises a set of iron shells arranged up and down, and the opposite sides of the iron shells are respectively provided with corresponding molding cavities, and the molding cavities are covered with a layer of corresponding sand boxes;

[0009] A buckle mechanism is used to lock and fix a group of the iron shells. After a group of the iron shells are locked and fixed, the sand boxes are combined into a workpiece casting cavity, and a casting port connected to the workpiece casting cavity is fixedly provided on the upper iron shell;

[0010] The exhaust mechanism comprises an exhaust hole arranged on the iron shell, wherein one end of the exhaust hole close to the sand box is spherically arranged and penetrates the iron shell, and a corresponding abutting ball is movably arranged in the exhaust hole, and the end of the abutting ball abuts against the end of the exhaust hole close to the sand box to form a closure for the exhaust hole; the upper part of the abutting ball is upwardly fixedly connected to a corresponding pressure plate with filter holes by a coil spring, and a group of tightening support columns connected by hot melt adhesive are arranged on the inner side of the coil spring, and the opposite ends of the tightening support columns are respectively fixed to the pressure plate with filter holes and the abutting ball; the ends of the exhaust holes away from the sand box are detachably installed with corresponding three-way pipes, and the middle part of the three-way pipes is installed in the exhaust hole by a threaded connection, and forms a tight abutment against the pressure plate with filter holes;

[0011] The air extraction mechanism comprises air extraction pistons movably arranged at both ends of the three-way pipe, corresponding compression springs are respectively squeezed and installed between the air extraction pistons, and corresponding metal wires are respectively fixedly connected to opposite sides of the air extraction pistons.

[0012] After the casting is completed, the metal wire is heated and stretched under the elastic force of the compression spring, the vacuum piston is pushed outward to form a negative pressure on the exhaust hole, and at the same time, the hot melt adhesive melts in a high temperature environment, and a group of the tightening support columns are arranged at intervals; under a negative pressure environment, the coil spring is compressed, the abutment ball moves upward, and the gas in the sand box is discharged into the exhaust hole through the gap between the abutment ball and the exhaust hole; after the exhaust is completed, the negative pressure value in the exhaust hole is reduced, and the abutment ball is reset under the elastic force of the coil spring to close the exhaust hole.

[0013] The ends of the tightening support columns are respectively fixed with receiving grooves for receiving the melted hot melt adhesive.

[0014] The storage groove is composed of a circle of panels which are inclined outwards and surround the top support column.

[0015] The metal wire is made of copper.

[0016] The bottom of the iron shell located on the bottom side is integrally formed in a grid shape and is provided with corresponding supporting plates downwardly, and the air extraction mechanisms are respectively located in the grid spaces formed by the supporting plates.

[0017] A group of the iron shells are respectively fixedly connected with corresponding butt joint convex edges at the periphery thereof, and the butt joint convex edges on the group of the iron shells are locked and fixed by the buckle mechanism.

[0018] The fastening mechanism includes a plurality of C-shaped buckle plates, one end of which is respectively installed with a corresponding tightening bolt by a threaded connection. After the C-shaped buckle plate is clamped into the docking flange, the tightening bolt is screwed down to lock and fix a group of docking flanges on the iron shell.

[0019] A group of corresponding fixing rods for lifting are respectively fixedly connected to both sides of a group of iron shells.

[0020] The outer ends of the fixing rods are respectively fixedly connected with corresponding anti-separation plates.

[0021] Advantages of the present invention:

[0022] 1) Based on the traditional iron shell sand box, the present invention adds an exhaust mechanism, which includes an exhaust hole arranged on the iron shell, and the exhaust hole is spherically arranged at one end close to the sand box and penetrates the iron shell, and a corresponding abutting ball is movably arranged in the exhaust hole, and the end of the abutting ball abuts against the end of the exhaust hole close to the sand box to form a closure for the exhaust hole; the upper part of the abutting ball is upwardly fixedly connected to a corresponding pressure plate with filter holes through a coil spring, and a group of tightening support columns connected by hot melt adhesive are arranged on the inner side of the coil spring, and the opposite ends of the tightening support columns are respectively fixed to the pressure plate with filter holes and the abutting ball; the end of the exhaust hole away from the sand box is detachably installed with a corresponding three-way pipe, and the middle part of the three-way pipe is installed in the exhaust hole by a threaded connection, and forms a tight abutment with the corresponding pressure plate with filter holes.

[0023] The three-way pipe of the exhaust mechanism is used to limit the pressure plate with filter holes, and then a group of tightening support columns connected by hot melt adhesive provide sufficient rigid support for the abutting sphere, thereby effectively forming a stable support for the abutting sphere, so as to form sufficient support effect on the sand box where the exhaust hole is located, thereby ensuring that the casting process can proceed smoothly.

[0024] 2) With the intervention of the three-way pipe of the exhaust mechanism, the present invention can further add an exhaust mechanism, which includes an exhaust piston movably arranged at both ends of the three-way pipe, corresponding compression springs are respectively squeezed and installed between the exhaust pistons, and corresponding metal wires are respectively fixedly connected to the opposite sides of the exhaust pistons. After the casting is completed, the mold body is in a high-temperature environment, and the hot melt adhesive between a group of tightening support columns is melted, so that a group of tightening support columns are arranged at intervals; and the metal wire of the exhaust mechanism is stretched by the compression spring under the high temperature environment, and under the elastic force of the compression spring, the exhaust piston is pushed outward to form a negative pressure on the exhaust hole; under the negative pressure environment, the coil spring is compressed, the abutment ball moves up, and the gas in the sand box is discharged into the corresponding exhaust hole through the gap between the abutment ball and the exhaust hole; after the exhaust is completed, the negative pressure value in the exhaust hole is reduced, and the abutment ball is reset under the elastic force of the coil spring to close the exhaust hole. Therefore, without affecting the casting process, the gas generated by the thermal decomposition of organic matter in the coating sand can be effectively discharged, thereby effectively preventing defects such as pores and depressions in the casting.

[0025] 3) The ends of the tightening support column of the present invention are respectively fixed with a receiving groove for receiving the melted hot melt adhesive, and the receiving groove is composed of a circle of enclosure plates inclined outward and surrounding the tightening support column. The melted hot melt adhesive is received by the receiving groove. After demolding, the three-way pipe, the air extraction mechanism, and the exhaust mechanism can be disassembled one by one for recycling and reprocessing, and the melted hot melt adhesive can be cleaned to prevent the melted hot melt adhesive from flowing into the exhaust hole, thereby ensuring that the subsequent casting and use of the present invention will not be affected, thereby ensuring the practical effect of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention.

[0027] Figure 2 It is a schematic diagram of the bottom side structure.

[0028] Figure 3 It is a cross-sectional view of the present invention.

[0029] Figure 4 It is a schematic diagram of the assembly of the exhaust mechanism and the air suction mechanism of the present invention.

[0030] Figure 5 This is a usage state diagram of the present invention.

[0031] Figure 6 It is a schematic structural diagram of a machine tool base cast by the present invention.

[0032] In the accompanying drawings: mold body 1, iron shell 101, sand box 102, fastening mechanism 2, C-shaped buckle plate 201, tightening bolt 202, casting mouth 3, exhaust mechanism 4, exhaust hole 401, abutment ball 402, coil spring 403, pressure plate with filter hole 404, three-way pipe 405, hot melt adhesive 5, tightening support column 6, exhaust mechanism 7, exhaust piston 701, compression spring 702, metal wire 703, storage cavity 8, docking flange 9, fixing rod for lifting 10, anti-detachment plate 11, support plate 12. DETAILED DESCRIPTION

[0033] In order to facilitate understanding by those skilled in the art, the structure of the present invention is further described in detail with reference to the embodiments in conjunction with the accompanying drawings:

[0034] refer to Figure 1-6 , a casting mold for machining a machine tool base, comprising

[0035] The mold body 1 comprises a set of iron shells 101 arranged up and down, and a corresponding molding cavity is respectively arranged on opposite sides of the iron shells 101, and the molding cavity is covered with a corresponding sand box 102;

[0036] The buckle mechanism 2 is used to lock and fix a group of the iron shells 101. After the group of the iron shells 101 are locked and fixed, the sand boxes 102 are combined into a workpiece casting cavity. A casting port 3 connected to the workpiece casting cavity is fixedly provided on the upper iron shell 101;

[0037] The exhaust mechanism 4 comprises an exhaust hole 401 provided on the iron shell 101. The exhaust hole 401 is spherically provided at one end close to the sand box 102 and penetrates the iron shell 101. A corresponding abutting ball 402 is movably provided in the exhaust hole 401. The end of the abutting ball 402 abuts against the end of the exhaust hole 401 close to the sand box 102 and closes the exhaust hole 401. The upper part of the abutting ball 402 is fixedly connected upwardly to a corresponding A pressure plate 404 with filter holes, a group of tightening support columns 6 connected by hot melt adhesive 5 are arranged on the inner side of the coil spring 403, and the opposite ends of the tightening support columns 6 are respectively fixed to the pressure plate 404 with filter holes and the abutting ball 402; the ends of the exhaust holes 401 away from the sand box 102 are respectively detachably installed with corresponding three-way pipes 405, and the middle part of the three-way pipe 405 is installed in the exhaust hole 401 by threaded connection, and forms a tightening abutment with the pressure plate 404 with filter holes;

[0038] The air extraction mechanism 7 comprises air extraction pistons 701 movably arranged at both ends of the three-way pipe 405 , corresponding compression springs 702 are respectively squeezed and installed between the air extraction pistons 701 , and corresponding metal wires 703 are respectively fixedly connected to the opposite sides of the air extraction pistons 701 .

[0039] On the basis of the traditional iron shell sand box 1, the present invention is additionally provided with an exhaust mechanism 4, and a three-way pipe of the exhaust mechanism 4 is used to limit the pressure plate 404 with filter holes, and then a group of tightening support columns 6 connected by hot melt adhesive 5 provide sufficient rigid support for the abutting ball 402, thereby effectively forming a stable support for the abutting ball 402, so as to form a sufficient supporting effect on the sand box 102 where the exhaust hole 401 is located, thereby ensuring that the casting process can proceed smoothly.

[0040] After the casting is completed, the metal wire 703 is heated and stretched under the elastic force of the compression spring 702, and the vacuum piston 701 is pushed outward to form a vacuum on the exhaust hole 401. At the same time, the hot melt adhesive 5 melts in a high temperature environment, and a group of the tightening support columns 6 are arranged at intervals; in a negative pressure environment, the coil spring 403 is compressed, and the abutment sphere 402 moves up, and the gas in the sand box 102 is discharged into the exhaust hole 401 through the interval between the abutment sphere 402 and the exhaust hole 401; after the exhaust is completed, the negative pressure value in the exhaust hole 401 is reduced, and the abutment sphere 402 is reset under the elastic force of the coil spring 403 to form a closure on the exhaust hole 401, so as to maintain the support of the sand shell at the exhaust hole 401.

[0041] With the intervention of the three-way pipe 405 of the exhaust mechanism 4, the present invention can further add an exhaust mechanism 7 to realize the vacuum of the exhaust hole 401 after the casting is completed, so as to facilitate the exhaust process. After the exhaust is completed, the negative pressure value in the exhaust hole 401 is reduced, and the abutting ball 402 is reset under the elastic force of the coil spring 403 to close the exhaust hole 401. Therefore, without affecting the casting process, the gas generated by the thermal decomposition of organic matter in the coating sand is effectively discharged, thereby effectively preventing defects such as pores and depressions from occurring in the casting.

[0042] The ends of the tightening support column 6 are respectively fixed with receiving grooves 8 for receiving the melted hot melt adhesive 5. The receiving groove 8 is composed of a circle of enclosure plates arranged on the tightening support column 6 in an outwardly inclined manner.

[0043] The melted hot melt adhesive 5 is received by the receiving groove 8. After demolding, the three-way pipe 405, the vacuum mechanism 7, and the exhaust mechanism 4 can be disassembled one by one for recycling and reprocessing, and the melted hot melt adhesive 5 can be cleaned to prevent the melted hot melt adhesive 5 from flowing into the exhaust hole 401, thereby ensuring that the subsequent casting and use of the present invention will not be affected, thereby ensuring the practical effect of the present invention.

[0044] The metal wire 703 is made of copper. The bottom of the iron shell 101 at the bottom is formed in a grid shape and is integrally formed with a corresponding support plate 12 downwardly arranged. The exhaust mechanism 4 and the air extraction mechanism 7 are respectively located in the grid space formed by the support plate 12.

[0045] A corresponding butt joint flange 9 is fixedly connected outwardly at the periphery of a group of the iron shells, and the butt joint flange 9 on a group of the iron shells is locked and fixed by the buckle mechanism 2. The buckle mechanism 2 comprises a plurality of C-shaped buckle plates 201, and one end of the C-shaped buckle plates 201 is respectively installed with corresponding jacking bolts 202 by threaded connection. After the C-shaped buckle plates 201 are clamped to the butt joint flange 9, the jacking bolts 202 are screwed down to lock and fix the butt joint flange 9 on a group of the iron shells.

[0046] A set of corresponding lifting fixing rods 10 are fixedly connected to both sides of a set of iron shells 101. The outer ends of the fixing rods 10 are fixedly connected to corresponding anti-separation plates 11.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A casting mold for machining a machine tool base, characterized in that: include The mold body (1) comprises a set of iron shells (101) arranged in an upper and lower manner, and a corresponding molding cavity is respectively arranged on opposite sides of the set of iron shells (101), and the molding cavity is covered with a layer of corresponding sand box (102); A buckling mechanism (2) is used to lock and fix a group of the iron shells (101); after the group of the iron shells (101) are locked and fixed, the sand boxes (102) are combined into a workpiece casting cavity, and a casting port (3) connected to the workpiece casting cavity is fixedly provided on the upper iron shell (101); The exhaust mechanism (4) comprises an exhaust hole (401) arranged on the iron shell (101), the exhaust hole (401) is arranged in a spherical shape at one end close to the sand box (102) and penetrates the iron shell (101), a corresponding movable abutting ball (402) is arranged in the exhaust hole (401), the end of the abutting ball (402) abuts against one end of the exhaust hole (401) close to the sand box (102) and forms a seal on the exhaust hole (401); the upper part of the abutting ball (402) is fixedly connected upwardly to a spiral spring (403) A corresponding pressure plate (404) with filter holes is provided inside the coil spring (403), and a group of tightening support columns (6) connected by hot melt adhesive (5) are arranged, and the opposite ends of the tightening support columns (6) are respectively fixed to the pressure plate (404) with filter holes and the abutting ball (402); a corresponding three-way pipe (405) is detachably installed at the end of the exhaust hole (401) away from the sand box (102), and the middle part of the three-way pipe (405) is installed in the exhaust hole (401) by threaded connection, and forms a tightening abutment with the pressure plate (404) with filter holes; The air extraction mechanism (7) comprises movable air extraction pistons (701) arranged at both ends of the three-way pipe (405), corresponding compression springs (702) are respectively squeezed and installed between the air extraction pistons (701), and corresponding metal wires (703) are respectively fixedly connected to opposite sides of the air extraction pistons (701); After the casting is completed, the metal wire (703) is heated and stretched under the elastic force of the compression spring (702), and the exhaust piston (701) is pushed outward to form a negative pressure on the exhaust hole (401). At the same time, the hot melt adhesive (5) melts in a high temperature environment, and a group of the tightening support columns (6) are arranged at intervals. Under the negative pressure environment, the coil spring (403) is compressed, the abutting ball (402) moves upward, and the gas in the sand box (102) is discharged into the exhaust hole (401) through the interval between the abutting ball (402) and the exhaust hole (401). After the exhaust is completed, the negative pressure value in the exhaust hole (401) is reduced, and the abutting ball (402) is reset under the elastic force of the coil spring (403) to close the exhaust hole (401). The ends of the tightening support columns (6) are respectively fixedly connected with receiving grooves (8) for receiving the melted hot melt adhesive (5).

2. A casting mold for machining a machine tool base according to claim 1, characterized in that: The storage groove (8) is composed of a circle of panels that are inclined outward and surround the tightening support column (6).

3. A casting mold for machining a machine tool base according to claim 2, characterized in that: The metal wire (703) is made of copper.

4. The casting mold for machining a machine tool base according to claim 1, characterized in that: The bottom of the iron shell (101) located at the bottom side is integrally formed in a grid shape, with corresponding support plates (12) arranged downwardly, and the air extraction mechanisms (7) are respectively located in the grid spaces formed by the support plates (12).

5. The casting mold for machining a machine tool base according to claim 1, characterized in that: A group of the iron shells are respectively fixedly connected outwardly with corresponding butt joint flanges (9) at their peripheries, and the butt joint flanges (9) on the group of the iron shells are locked and fixed by the buckle mechanism (2).

6. A casting mold for machining a machine tool base according to claim 5, characterized in that: The buckling mechanism (2) comprises a plurality of C-shaped buckle plates (201), one end of each of the C-shaped buckle plates (201) being respectively installed with corresponding tightening bolts (202) by means of threaded connection. After the C-shaped buckle plates (201) are buckled onto the docking flanges (9), the tightening bolts (202) are screwed downward to lock and fix a group of docking flanges (9) on the iron shell.

7. The casting mold for machining a machine tool base according to claim 1, characterized in that: A set of corresponding hanging fixing rods (10) are respectively fixedly connected to both sides of a set of iron shells (101).

8. The casting mold for machining a machine tool base according to claim 7, characterized in that: The outer ends of the fixed rods (10) are respectively fixedly connected to corresponding anti-separation plates (11).

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