CN215144446U - Machine tool box casting mold structure and blank formed by sand casting - Google Patents
Machine tool box casting mold structure and blank formed by sand casting Download PDFInfo
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- CN215144446U CN215144446U CN202121130695.7U CN202121130695U CN215144446U CN 215144446 U CN215144446 U CN 215144446U CN 202121130695 U CN202121130695 U CN 202121130695U CN 215144446 U CN215144446 U CN 215144446U
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Abstract
The utility model discloses a machine tool box casting mold structure and a blank formed by sand casting, which comprises a cover box and a lower sand box, wherein a sand mold and a lower cavity are arranged in the lower sand box, and a plurality of sand cores are arranged in the lower cavity; the sand cores are provided with core heads which are respectively fixed on the corresponding inner walls of the sand molds, and a plurality of core supports are arranged between the sand cores and the sand molds; the cover box cover is arranged on the lower sand box and connected through a plurality of fasteners, sand is filled in the cover box, and an upper cavity is arranged at the inner side corresponding to the lower cavity; a pouring cup is arranged above the cover box, a pouring gate is arranged in the pouring cup, and the pouring gate is communicated with the lower cavity through a pouring system; the casting mold structure of the machine tool box body is reasonable in parting, and the sand mold and the sand core are simple in structure and easy to arrange; the mould assembling is convenient, the positioning is accurate, the position of the sand core is not easy to change, so that the size of the formed blank casting is accurate, and the casting defects are few.
Description
Technical Field
The utility model relates to the casting technology field, concretely relates to lathe box casting mold structure and blank of sand casting molding.
Background
The main parts of the machine tool, such as the bed, the column, the beam, the box, etc., are usually obtained by casting a blank and processing the blank. Resin sand casting is a mature casting method, and adopts a casting mode that resin is used as a binder, a curing agent is matched for hardening and forming to form a sand core or a sand mold, and then pouring is carried out; the hot-method precoated resin sand, the hot-box resin sand, the cold-box resin sand, the furan resin self-hardening sand and the like are mainly used. The resin sand has high strength after hardening, is particularly suitable for machine molding, and can be used for manufacturing complex and thin-wall castings. Therefore, large machine tool parts are generally molded by resin sand casting.
If the main shaft box body is an important part of a numerical control machine tool and is mainly used for clamping a cutter and driving the cutter to rotate, the rotating speed range of the main shaft, the output torque and the operation stability of the main shaft have direct influence on processing. The structure of main shaft box is not complicated, and the appearance is comparatively regular, but need set up the shaft hole of a plurality of directions, and these holes are cast out through the cast mode together, can reduce subsequent processingquantity, but in the casting process, the setting of psammitolite and sand mould is comparatively critical, need not consider convenient operation, also need guarantee that the size and the appearance of shaping back foundry goods blank meet the requirements, consequently it is more important to design a sand casting fashioned lathe box casting mould structure.
Disclosure of Invention
The utility model aims at providing a fashioned lathe box casting mould structure of sand casting and blank to the problem that prior art exists.
In order to achieve the above object, the utility model adopts the following technical scheme:
a machine tool box body casting mold structure formed by sand casting comprises a cover box and a lower sand box which are matched with each other, wherein a sand mold is filled in the lower sand box, a lower cavity is arranged in the sand mold, a plurality of sand cores are arranged in the lower cavity in an arrangement and combination mode, and a main body structure of a box body is formed between the sand cores and the lower cavity; the sand cores are provided with core heads which are respectively fixed on the corresponding inner walls of the sand molds, and a plurality of core supports are arranged between the sand cores and the sand molds; the cover box cover is arranged on the lower sand box and connected through a plurality of fasteners, sand is filled in the cover box, an upper cavity is arranged at the position corresponding to the lower cavity at the inner side, and a core support is also arranged between the upper cavity and the sand core which is close to the upper cavity; a pouring cup is arranged above the cover box, a pouring gate is arranged in the pouring cup, and the pouring gate is communicated with the lower cavity through a pouring system; and the cover box is also provided with a riser and an air outlet which are communicated with the upper cavity.
The casting mold structure of the machine tool box body is reasonable in parting, and the sand mold and the sand core are simple in structure and easy to arrange; the mould assembling is convenient, the positioning is accurate, the position of the sand core is not easy to change, so that the size of the formed blank casting is accurate, and the casting defects are few.
The parting surface is arranged on the flat box wall, namely the plane of the matching surface of the cover box and the drag box, so that most of the structure of the casting is positioned in the drag box, particularly the sand cores are all positioned in the drag box, the core setting operation of workers is facilitated, the cover box can be aligned to the cover box as required, the operation is convenient, and the subsequent molding is facilitated.
The core head arranged on each sand core is clamped in the sand mold, so that the sand cores are convenient to fix, and the core head is also beneficial to forming holes in the casting; the core head portion engaged with the sand mold has a slope.
The use of chaplet cooperates the setting of core head, can further support and fix these psammitolites, especially great psammitolite, utilizes the chaplet to support, can avoid it to rock, also can not float during the molten iron pouring for fashioned foundry goods size and shape are more accurate.
The pouring cup is arranged on the cover box, so that molten iron can be poured conveniently; the riser arranged on the cover box is convenient and practical, and can accurately judge whether the molten iron is full of the cavity; the air outlet is convenient for exhausting.
Further, the number of the sand cores is three, namely a first sand core and a second sand core which are arranged below the sand cores side by side, and a third sand core which is positioned above the first sand core and the second sand core; the core heads of the first sand core and the second sand core are respectively fixed at the bottom of the sand mold in a clamping manner, the core head of the third sand core is fixed at the side wall of the sand mold in a clamping manner, and the periphery of the third sand core and the sand mold are provided with the chaplets at intervals.
The machine tool box body can complete the forming of an internal structure by arranging three main sand cores, and simultaneously cast large holes and small holes together, thereby reducing subsequent machining; the three sand cores are matched and supported with each other, and by combining the reasonable arrangement of the chaplets and the core heads, the whole structure is stable and firm, and can still keep the original position under the impact of molten iron.
Furthermore, air outlet ropes are preset in the sand cores and extend to the sand molds through the core heads and penetrate through the sand molds to penetrate out of the drag flasks.
The air outlet rope is convenient for exhausting air in the sand core, and is led out of the sand box through the core head and the sand mold, so that the gas is prevented from being accumulated in the cavity (the lower cavity and the upper cavity), and the burden of exhausting the cavity is increased.
Furthermore, a plurality of movable blocks are further arranged in the lower cavity, the movable blocks are arranged at corners and/or arc-shaped outlines, and the movable blocks are fixedly connected to the inner wall of the sand mold.
The movable block can be flexibly replaced and adjusted according to the actual shape to produce a series of box bodies with different outer contours but not very large differences, and each box body is prevented from being newly modeled.
Further, the pouring system comprises a cross gate arranged in the cover box, and a plurality of straight gates and ingates arranged in the drag flask; the middle part of the horizontal pouring gate is communicated with the pouring gate, the straight pouring gates are respectively connected and communicated with the horizontal pouring gate, one end of the inner pouring gate is communicated with the lower end part of the straight pouring gate, and the other end of the inner pouring gate is communicated with the lower cavity.
The pouring system with the structure is easy to arrange, molten iron can be conveniently filled into the cavity from different positions, and the filling is stable.
Furthermore, sealing mud strips are arranged on the upper end surface of the sand mold around the periphery of the lower cavity. When the cover box is closed, the sealing mud strips are pressed, the sealing effect can be achieved, the high-temperature molten iron is prevented from seeping from the parting surface, and safety is guaranteed while waste of the molten iron is avoided.
Furthermore, flange edges are arranged on the peripheries of the end parts of the drag flask and the cover box, and the fastening pieces are split bolts connected to the flange edges. The flange edges are arranged to facilitate connection of split bolts, the split bolts are multiple groups, and the split bolts are convenient to assemble and disassemble and high in connection strength.
Furthermore, vertical reinforcing ribs are respectively arranged on the peripheries of the drag flask and the cover box, so that the strength and the stability can be improved; and a plurality of through holes are respectively formed in the box walls between the adjacent reinforcing ribs, and the through holes can be used for exhausting air and are convenient for leading out the air outlet rope.
Furthermore, the periphery of the sand core, the inner periphery of the lower cavity and the inner periphery of the upper cavity are respectively coated with a refractory coating layer, the sand core, the sand mold and the pouring cup are all self-hardening resin sand such as furan resin self-hardening sand, and a sand structure with certain strength can be formed after hardening and molding.
Further, the blank is manufactured by utilizing the machine tool box casting structure formed by sand casting, and the blank is a gray iron casting formed by pouring molten iron into the lower cavity and the upper cavity and solidifying.
Compared with the prior art, the beneficial effects of the utility model are that: 1. the casting mold structure of the machine tool box body is reasonable in parting, and the sand mold and the sand core are simple in structure and easy to arrange; the mould assembling is convenient, the positioning is accurate, and the position of the sand core is not easy to change, so that the size of the formed blank casting is accurate, and the casting defects are fewer; 2. the parting surface is arranged on the flat box wall, namely the plane of the matching surface of the cover box and the drag box, so that most of the structure of the casting is positioned in the drag box, particularly the sand core is completely positioned in the drag box, the core setting operation of workers is facilitated, the cover box can be aligned to the cover box as required, the operation is convenient, and the subsequent molding is facilitated; 3. the core head arranged on each sand core is convenient for clamping and fixing the sand core and is also beneficial to forming holes on a casting; 4. the core support is used and matched with the arrangement of the core head, the sand cores, particularly large sand cores, can be further supported and fixed, and the core support can be used for avoiding shaking and preventing the sand cores from floating when molten iron is poured, so that the size and the shape of a formed casting are more accurate; 5. the arrangement of the air outlet holes, the air outlet ropes and the through holes is convenient for the exhaust of sand cores and sand molds, and the air hole defects can be reduced.
Drawings
FIG. 1 is a schematic overall sectional view of a casting mold structure of a sand casting machine tool box according to the present invention;
FIG. 2 is a schematic cross-sectional structure diagram of a casting mold structure of a sand casting machine tool box of the present invention;
FIG. 3 is a schematic side view of a casting mold structure of a machine tool box for sand casting according to the present invention;
FIG. 4 is a schematic top view of a cover box of a machine tool box casting structure for sand casting according to the present invention;
in the figure: 1. a drag flask; 2. covering the box; 3. sand molding; 4. a lower cavity; 5. a third sand core; 6. a first sand core; 7. a second sand core; 8. a core print; 9. an upper cavity; 10. core supporting; 11. a pouring cup; 12. a gate; 13. a cross gate; 14. a sprue; 15. an inner pouring channel; 16. a riser; 17. an air outlet; 18. a gas outlet rope; 19. a movable block; 20. oppositely pulling the bolts; 21. reinforcing ribs; 22. a through hole; 23. identifying; 24. and (4) flange edges.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "middle", "upper", "lower", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The first embodiment is as follows:
as shown in fig. 1 to 4, a machine tool box casting mold structure formed by sand casting comprises a cover box 2 and a drag box 1 which are used in cooperation, wherein a sand mold 3 is filled in the drag box 1, a lower cavity 4 is arranged in the sand mold 3, a plurality of sand cores are arranged in the lower cavity 4 in an arrangement and combination mode, and a main body structure of the machine tool box is formed between the sand cores and the sand mold 3; the sand cores are provided with core heads 8, the core heads 8 are respectively fixed on the corresponding inner walls of the sand molds 3, and a plurality of chaplets 10 are arranged between the sand cores and the sand molds 3; the cover box 2 is covered on the lower sand box 1 and is connected with the lower sand box through a plurality of fasteners, sand is filled in the cover box 2, an upper cavity 9 is arranged at the position corresponding to the lower cavity 4 at the inner side, and a chaplet 10 is also arranged between the upper cavity 9 and the sand core which is close to the upper cavity; a pouring cup 11 is arranged above the cover box 2, a pouring gate 12 is arranged in the pouring cup 11, and the pouring gate 12 is communicated with the lower cavity 4 through a pouring system; and a riser 16 and an air outlet 17 which are communicated with the upper cavity 9 are also arranged on the cover box 2.
The casting mold structure of the machine tool box body is reasonable in parting, and the sand mold and the sand core are simple in structure and easy to arrange; the mould assembling is convenient, the positioning is accurate, the position of the sand core is not easy to change, so that the size of the formed blank casting is accurate, and the casting defects are few.
The parting surface is arranged on the flat box wall, namely the plane of the matching surface of the cover box 2 and the drag box 1, so that most of the structure of the casting is positioned in the drag box 1, particularly, the sand cores are all positioned in the drag box 1, the core setting operation of workers is facilitated, the cover box 2 is only required to be aligned to the cover box according to the requirement, the operation is convenient, and the subsequent molding is also facilitated.
The core print 8 arranged on each sand core is clamped in the sand mould 3, so that the sand cores are convenient to fix, and the core print 8 is also beneficial to forming of holes in the casting; the core head portion engaged with the sand mold has a slope.
The use of chaplet 10, the cooperation of setting of core print 8 can further support and fix these psammitolites, especially great psammitolite, utilizes the chaplet to support, can avoid it to rock, also can not float during the molten iron pouring for fashioned foundry goods size and shape are more accurate.
The pouring cup 11 is arranged on the cover box 2, so that molten iron can be poured conveniently; the riser 16 arranged on the cover box 2 is convenient and practical, and can accurately judge whether the cavity is filled with molten iron; the air outlet 17 is convenient for air exhaust.
Further, the number of the sand cores is three, namely a first sand core 6 and a second sand core 7 which are arranged below the sand cores side by side, and a third sand core 5 which is positioned above the first sand core 6 and the second sand core 7; the core heads of the first sand core 6 and the second sand core 7 are respectively fixed at the bottom of the sand mold 3 in a clamping manner, the core head of the third sand core 5 is fixed on the side wall of the sand mold 3 in a clamping manner, and the core supports 10 are arranged around the third sand core 5 and between the sand mold 3 at intervals.
The machine tool box body can complete the forming of an internal structure by arranging three main sand cores, and simultaneously cast large holes and small holes together, thereby reducing subsequent machining; the three sand cores are matched and supported with each other, and by combining the reasonable arrangement of the chaplets and the core heads, the whole structure is stable and firm, and can still keep the original position under the impact of molten iron.
Furthermore, air outlet ropes 18 are preset in the third sand core 5, the first sand core 6 and the second sand core 7, and the air outlet ropes 18 extend to the sand mold 3 through the core heads 8 and penetrate through the sand mold 3 to penetrate out of the drag flask 1.
The air outlet rope 18 is convenient for exhausting air in the sand core, and is led out of the sand box through the core head and the sand mold, so that the accumulation of air in the cavity (the lower cavity and the upper cavity) is avoided, and the burden of exhausting the cavity is increased.
Further, a plurality of movable blocks 19 are further arranged in the lower cavity 4, the movable blocks 19 are arranged at corners and arc-shaped outlines, and the movable blocks 19 are fixedly connected to the inner wall of the sand mold 3.
The movable block 19 can be flexibly replaced and adjusted according to the actual shape to produce a series of box bodies with different outer contours but not very large differences, and each box body is prevented from being newly modeled.
Further, the gating system includes a cross runner 13 provided in the head box 2, and a plurality of gates 14 and gates 15 provided in the drag flask 1; the middle part of the horizontal pouring gate 13 is communicated with the sprue 12, the straight pouring gates 14 are respectively connected and communicated with the horizontal pouring gate 13, one end of the inner pouring gate 15 is communicated with the lower end part of the straight pouring gate 14, and the other end of the inner pouring gate is communicated with the lower cavity 4.
The pouring system with the structure is easy to arrange, molten iron can be conveniently filled into the cavity from different positions, and the filling is stable.
Furthermore, sealing mud strips are arranged on the upper end surface of the sand mold 3 around the lower cavity 4. When the cover box 2 is covered, the cover box presses the sealing mud strips, a sealing effect can be achieved, high-temperature molten iron is prevented from seeping from a parting surface, and safety is guaranteed while waste of the molten iron is avoided.
Further, the end portions of the drag flask 1 and the cover box 2 are provided with flange edges 24 on the periphery, and the fastening members are split bolts 20 connected to the flange edges 24. The flange edges 24 are convenient for the connection of the split bolts 20, the split bolts 20 are in multiple groups, the assembly and disassembly are convenient, and the connection strength is high.
Furthermore, the flange edge 24 is provided with an identifier 23 which is aligned up and down, and the identifier 23 is favorable for accurate alignment of the cover box 2 and the drag box 1, because the inside of the box is difficult to observe after the box is closed, and the accuracy of mold closing can be ensured through the identifier preset outside.
Furthermore, the peripheries of the drag flask 1 and the cover box 2 are respectively provided with a vertical reinforcing rib 21, so that the strength and the stability can be improved; the box walls between the adjacent reinforcing ribs 21 are respectively provided with a plurality of through holes 22, and the through holes 22 can be used for exhausting air and are convenient for leading out an air outlet rope.
Furthermore, the periphery of the sand core, the inner periphery of the lower cavity 4 and the inner periphery of the upper cavity 9 are respectively coated with a refractory coating layer, the sand core, the sand mold 3 and the pouring cup 11 are all self-hardening resin sand, such as furan resin self-hardening sand, and a sand structure with certain strength can be formed after hardening and molding.
Example two:
this implementation provides the shaping mode of lathe box foundry goods blank.
The blank is a gray iron casting which is formed by pouring molten iron into the lower cavity 4 and the upper cavity 9 and solidifying.
Specifically, molten iron is poured from the pouring cup 11, enters the lower cavity 4 through the pouring system, gradually rises into the upper cavity 9 along with the filling of the molten iron, and enters the riser 16, and then pouring is stopped; and after the molten iron is solidified and the casting is cooled, opening the cover box 2, lifting the casting out, and cleaning and polishing by falling sand to obtain a blank of the box casting.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A machine tool box body casting mold structure formed by sand casting is characterized by comprising a cover box and a lower sand box which are matched with each other, wherein a sand mold is filled in the lower sand box, a lower cavity is arranged in the sand mold, a plurality of sand cores are arranged in the lower cavity in an arrangement and combination mode, and a main body structure of a box body is formed between the sand cores and the lower cavity; the sand cores are provided with core heads which are respectively fixed on the corresponding inner walls of the sand molds, and a plurality of core supports are arranged between the sand cores and the sand molds; the cover box cover is arranged on the lower sand box and connected through a plurality of fasteners, sand is filled in the cover box, an upper cavity is arranged at the position corresponding to the lower cavity at the inner side, and a core support is also arranged between the upper cavity and the sand core which is close to the upper cavity; a pouring cup is arranged above the cover box, a pouring gate is arranged in the pouring cup, and the pouring gate is communicated with the lower cavity through a pouring system; and the cover box is also provided with a riser and an air outlet which are communicated with the upper cavity.
2. The machine tool box casting structure formed by sand casting according to claim 1, wherein the number of the sand cores is three, and the three sand cores are respectively a first sand core and a second sand core which are arranged below the three sand cores side by side, and a third sand core which is arranged above the first sand core and the second sand core; the core heads of the first sand core and the second sand core are respectively fixed at the bottom of the sand mold in a clamping manner, the core head of the third sand core is fixed at the side wall of the sand mold in a clamping manner, and the periphery of the third sand core and the sand mold are provided with the chaplets at intervals.
3. The sand casting machine box casting structure according to claim 1, wherein an air outlet rope is preset in each sand core, extends to the sand mold through the core print and penetrates through the sand mold to pass out of the drag flask.
4. The sand casting machine box casting mold structure according to claim 1, wherein a plurality of movable blocks are further arranged in the lower cavity, the movable blocks are arranged at corners and/or arc-shaped contours, and the movable blocks are fixedly connected to the inner wall of the sand mold.
5. The sand cast machine box casting structure of claim 1 wherein the gating system includes a cross runner disposed in the head box and a plurality of sprues and ingates disposed in the drag box; the middle part of the horizontal pouring gate is communicated with the pouring gate, the straight pouring gates are respectively connected and communicated with the horizontal pouring gate, one end of the inner pouring gate is communicated with the lower end part of the straight pouring gate, and the other end of the inner pouring gate is communicated with the lower cavity.
6. The sand casting machine box casting structure as claimed in claim 1, wherein the upper end surface of the sand mold is provided with sealing mud strips around the periphery of the lower cavity.
7. The sand casting machine box casting structure as claimed in claim 1, wherein the ends of the drag flask and the cover box are provided with flange edges around the peripheries thereof, and the fastening member is a split bolt connected to the flange edges; and the flange edge is provided with an upper and lower alignment mark.
8. The sand casting machine tool box casting structure as claimed in claim 1, wherein the outskirts of the drag flask and the cover box are respectively provided with vertical reinforcing ribs, and the walls between the adjacent reinforcing ribs are respectively provided with a plurality of through holes.
9. The sand casting machine tool box casting structure according to claim 1, wherein the outer periphery of the sand core, the inner periphery of the lower cavity and the inner periphery of the upper cavity are respectively coated with a refractory coating layer, and the sand core, the sand mold and the sprue cup are all self-hardening resin sand.
10. A blank manufactured by using the sand-cast machine tool box casting mold structure as claimed in claim 1, wherein the blank is a gray iron casting which is formed by pouring molten iron into the lower cavity and the upper cavity and solidifying.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121130695.7U CN215144446U (en) | 2021-05-25 | 2021-05-25 | Machine tool box casting mold structure and blank formed by sand casting |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121130695.7U CN215144446U (en) | 2021-05-25 | 2021-05-25 | Machine tool box casting mold structure and blank formed by sand casting |
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| CN215144446U true CN215144446U (en) | 2021-12-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115106485A (en) * | 2022-05-11 | 2022-09-27 | 北京航星机器制造有限公司 | Sand core assembly and mould for sand casting thin-wall structure |
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2021
- 2021-05-25 CN CN202121130695.7U patent/CN215144446U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115106485A (en) * | 2022-05-11 | 2022-09-27 | 北京航星机器制造有限公司 | Sand core assembly and mould for sand casting thin-wall structure |
| CN115106485B (en) * | 2022-05-11 | 2024-01-09 | 北京航星机器制造有限公司 | Sand core assembly and mold for sand casting thin-wall structure |
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