CN217551088U - Loam core frock of magnesium alloy arc thin wall foundry goods - Google Patents
Loam core frock of magnesium alloy arc thin wall foundry goods Download PDFInfo
- Publication number
- CN217551088U CN217551088U CN202221234466.4U CN202221234466U CN217551088U CN 217551088 U CN217551088 U CN 217551088U CN 202221234466 U CN202221234466 U CN 202221234466U CN 217551088 U CN217551088 U CN 217551088U
- Authority
- CN
- China
- Prior art keywords
- core
- box
- bottom plate
- hole
- loam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The utility model discloses a core tool for a magnesium alloy arc thin-wall casting, wherein a lower core box and an upper core box are sequentially fixed on a rectangular bottom plate, four frames of splicing surfaces of the upper box and the lower box are respectively provided with a semicircular hole, and four semicircular holes and a semicircular hole are respectively encircled to form a circular hole; a cross connecting rod is arranged between the lower core box and the upper core box, and the cross connecting rods are in a cross shape which is vertical to each other; the loam core upper box and the loam core lower box are symmetrically arranged by taking the splicing surface as the center, the inner wall and the outer wall are smoothly spliced in an aligned mode, and the shape of a die cavity after die assembly is the same as that of the inner cavity of the arc-shaped thin-wall casting; four outer ports of the cross connecting rod are respectively provided with a screw hole, the middle parts of four edges of the rectangular bottom plate are respectively welded with a bottom plate vertical lug which is erected upwards, the middle part of each bottom plate vertical lug is respectively provided with a central hole, a loam core positioning shaft is respectively inserted in the central hole of each bottom plate vertical lug, and the inner end of each loam core positioning shaft is respectively screwed into the corresponding cross connecting rod screw hole. The tool can accurately ensure the size precision of the loam core and the positioning accuracy of the cross-shaped positioning hole.
Description
Technical Field
The utility model relates to a frock is used in the magnesium alloy casting, especially relates to a loam core frock of magnesium alloy arc thin wall foundry goods, belongs to magnesium alloy precision casting technical field.
Background
The core is commonly called as "sand core" or "core", and is used to form the internal structure of the casting during casting, and is usually made of core sand prepared from raw sand and a binder (water glass, resin, etc.) by hand or machine in a core box. Before casting, "sand core" is placed in casting mould, after the molten metal is poured in and condensed, it is removed when the sand is produced, so that a cavity can be formed in the casting.
An airplane detector is arranged below the front side of a cockpit of some helicopters, the middle section of a shell of the airplane detector is spherical, the periphery of the middle section of the shell is respectively cut off by planes, namely the upper part and the lower part of the shell are spherical, the left plane and the right plane are parallel, the front plane and the rear plane are parallel, the centers of the upper spherical surface and the lower spherical surface are provided with vertical center holes, the two vertical center holes are positioned on the vertical diameter line of the spherical surfaces together, and the outer ends of the vertical center holes are respectively provided with a lug boss. The centers of the left plane and the right plane are respectively provided with a transverse central hole, the two transverse central holes share the same axis, the axis of the transverse central hole is vertically intersected with the axis of the vertical central hole at the center of the sphere, and the outer ends of the transverse central holes are also respectively provided with a lug boss. The front side and the rear side of the middle section of the shell are connected with spherical crown shells, the middle section is spliced into a complete spherical shell, and the left side and the right side of the spherical shell are still planes, so that the spherical shell is convenient to clamp and mount.
The inner cavity of the shell is provided with a rotating part rotating around a transverse axis, in order to reduce weight and ensure detection precision, the wall thickness of the shell of the aircraft detector is required to be thin, the outer edge of the built-in rotating part is attached to the outer wall of the spherical shell to rotate as much as possible, and therefore the wall thickness of the shell of the aircraft detector is only designed to be a thin wall of 2.5 mm. Because the spherical surface of the inner wall of the shell is a non-processing surface, the tolerance of the inner cavity can only be positive but not negative, namely, the wall thickness of the product can only be thin but not thick, so the size precision of the sand core is higher.
The size precision of the arc surface of the inner cavity of the shell is difficult to control, the mould is split into multiple surfaces, after the mould is machined, the arc shape is difficult to be consistent, the arc shape of the sand core is difficult to reach an ideal state, and the arc shapes at the two ends are difficult to guarantee to be distributed on the same spherical surface.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the problem that exists among the prior art, provide a loam core frock of magnesium alloy arc thin wall foundry goods, can accurately guarantee the size precision of loam core, make and keep accurate even clearance between loam core outer wall and the sand box inner mould wall, and guarantee the location accuracy of cross locating hole, improve the foundry goods quality.
In order to solve the technical problem, the utility model discloses a loam core frock of magnesium alloy arc thin wall foundry goods, including the rectangle bottom plate, be fixed with loam core lower box on the rectangle bottom plate, the last port of loam core lower box is overlapped with the cross connecting rod; the middle parts of four frames of the lower core box are respectively provided with a lower core box semicircular hole with an upward opening, four support rods of the cross connecting rod are respectively embedded in the corresponding lower core box semicircular holes and are coaxial with each other, the upper part of the lower core box is superposed and connected with an upper core box, the middle parts of lower ports of the four frames of the upper core box are respectively provided with an upper core box semicircular hole with a downward opening, and each upper core box semicircular hole and the lower core box semicircular hole are encircled to form a complete core box circular hole; the loam core upper box and the loam core lower box are symmetrically arranged by taking a splicing surface as a center, the inner wall and the outer wall are smoothly spliced in an aligned mode, and the shape of a die cavity formed by the assembly of the loam core upper box and the loam core lower box is the same as that of an inner cavity of the arc-shaped thin-wall casting; the outer ports of four supporting rods of the cross connecting rod are respectively provided with a cross connecting rod screw hole, the middle parts of four edges of the rectangular bottom plate are respectively welded with bottom plate vertical lugs which are erected upwards, the middle parts of the height directions of the bottom plate vertical lugs are respectively provided with a through bottom plate vertical lug center hole, a loam core positioning shaft matched with the bottom plate vertical lug center hole is respectively inserted into the bottom plate vertical lug center hole, the inner end of each loam core positioning shaft is respectively provided with a screw thread section, and the screw thread sections of the loam core positioning shafts are respectively screwed into the corresponding cross connecting rod screw holes.
As the utility model discloses an improvement, be equipped with a plurality of bottom plate locating holes on the rectangle bottom plate, it has the bottom plate locating pin to peg graft respectively in each bottom plate locating hole, four bights of lower extreme of box under the loam core are equipped with box locating hole under the loam core respectively, and the upper end of each bottom plate locating pin is pegged graft respectively in box locating hole under corresponding loam core.
As a further improvement of the utility model, four bights in the upper end of box under the loam core are equipped with box locating hole under the loam core respectively, and it has box locating pin under the loam core to peg graft respectively in the box locating hole under each loam core, four bights in the lower extreme of box on the loam core are equipped with box locating hole on the loam core respectively, and box locating pin is pegged graft respectively on corresponding loam core under each loam core in the box locating hole.
As a further improvement of the utility model, the major axis of the cross connecting rod extends along the axis of the length direction of the bottom plate, and the outer end heads of the major axis and the minor axis respectively and symmetrically exceed the inner wall of the mold cavity of the loaf core box.
Compared with the prior art, the utility model discloses following beneficial effect has been obtained: the axis of the four positioning holes which are distributed in a cross shape can be accurately ensured to be vertically intersected with the sphere center, the axis of the two positioning holes in the center of the cambered surface is positioned on the diameter line of the vertical middle section, the mold closing and positioning with a sand box are facilitated, and the inner spherical surface precision of a casting can be accurately ensured after the mold closing.
Drawings
The invention is described in further detail below with reference to the attached drawings and the detailed description, wherein the drawings are provided for reference and illustration purposes only and are not intended to limit the invention.
FIG. 1 is a perspective view of a core assembly for a magnesium alloy arc thin-wall casting of the present invention;
fig. 2 is an exploded view of fig. 1.
In the figure: 1. a rectangular bottom plate; 2. a bottom plate vertical lug; 2a, a central hole of a vertical lug of the bottom plate; 3. putting the loam core into a box; 3a, arranging a semicircular hole in the loam core lower box; 4. a cross-shaped connecting rod; 5. putting the loam core into a box; 5a, arranging a semicircular hole on the loam core upper box; 6. the loam core positions the axle.
Detailed Description
In the following description of the present invention, the terms "upper", "lower", "front", "rear", "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, and do not mean that the device must have a specific orientation.
As shown in fig. 1 and 2, the utility model discloses loam core frock of magnesium alloy arc thin wall foundry goods, including rectangle bottom plate 1, the middle part at four borders of rectangle bottom plate 1 has welded respectively and has upwards stood up bottom plate vertical lug 2, and the middle part of 2 direction of height of each bottom plate vertical lug is equipped with the bottom plate vertical lug centre bore 2a that link up respectively.
The rectangular bottom plate 1 is provided with a plurality of bottom plate positioning holes, bottom plate positioning pins are respectively inserted into the bottom plate positioning holes, the lower core box 3 is rectangular, four corners of the lower end of the lower core box 3 are respectively provided with lower core box positioning holes, the upper ends of the bottom plate positioning pins are respectively inserted into the corresponding lower core box positioning holes, and the lower core box 3 is fixed on the rectangular bottom plate 1.
Accurately processing a cross connecting rod 4 in advance, wherein the cross connecting rod 4 comprises a long shaft and a short shaft which are mutually vertical and are connected into a whole in a cross shape; the two ends of the long shaft and the two ends of the short shaft are respectively provided with a cross connecting rod screw hole which extends inwards along the axis.
The bottom of the loam core lower box 3 is through, and the shape of the inner cavity of the loam core lower box is consistent with the shape of the inner wall of the lower half part of the product; the middle parts of four frames of the lower sand core box 3 are respectively provided with a lower sand core box semicircular hole 3a with an upward opening, and the axes of the lower sand core box semicircular holes 3a are vertically crossed and are positioned in the plane of the upper port.
The cross connecting rod 4 is placed at an upper port of the lower sand core box 3, two ends of the long shaft are respectively positioned in two semicircular holes 3a of the lower sand core box 3 in the width direction of the lower sand core box and extend out for the same distance symmetrically, two ends of the short shaft are respectively positioned in two semicircular holes 3a of the lower sand core box 3 in the length direction of the lower sand core box and extend out for the same distance symmetrically.
And four corners at the upper end of the lower core box 3 are respectively provided with lower core box positioning holes, and lower core box positioning pins are respectively inserted into the lower core box positioning holes. The upper core box 5 is superposed above the lower core box 3, four corners of the lower end of the upper core box 5 are respectively provided with upper core box positioning holes, and each lower core box positioning pin is respectively inserted into the corresponding upper core box positioning hole. The loam core upper box 5 and the loam core lower box 3 are symmetrically arranged by taking the splicing surface as a center, the inner wall and the outer wall are smoothly aligned and spliced, and the shape of a die cavity formed by combining the loam core upper box 5 and the loam core lower box 3 is the same as that of an inner cavity of the arc-shaped thin-wall casting.
The middle parts of the lower ports of the four frames of the upper core box 5 are respectively provided with upper core box semicircular holes 5a with downward openings, and the upper core box semicircular holes 5a and the lower core box semicircular holes 3a respectively enclose complete core box circular holes.
The long shaft of the cross connecting rod 4 extends along the axial line of the length direction of the bottom plate, and the outer ends of the long shaft and the short shaft respectively and symmetrically exceed the inner wall of the mold cavity of the mud core box.
The central holes 2a of the vertical lugs of each bottom plate are respectively inserted with a loam core positioning shaft 6 matched with the central holes, and the outer end head of each loam core positioning shaft 6 can be provided with an inner square tenon so as to rotate the loam core positioning shaft 6. The inner end of each sand core positioning shaft 6 is respectively provided with a thread section, and the thread sections of each sand core positioning shaft are respectively screwed into the corresponding screw holes of the cross connecting rod, so that the cross connecting rod 4 is accurately positioned, the long shaft and the two round holes in the length direction of the sand core box are coaxial, and the short shaft and the two round holes in the width direction of the sand core box are coaxial.
Resin sand is poured into a die cavity formed by closing the upper sand core box 5 and the lower sand core box 3 and tamped, after the resin sand is solidified, the four sand core positioning shafts 6 are disassembled, the upper sand core box 5 and the lower sand core box 3 are sequentially disassembled, and a sand core blank can be obtained, wherein the shape and the size of the sand core blank are consistent with the accuracy of the inner cavity of a product after the sand core blank is subjected to shape modification.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention. In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent replacement or equivalent transformation fall within the protection scope required by the utility model. The technical features of the present invention that have not been described can be realized by or using the prior art, and are not described herein again.
Claims (4)
1. The utility model provides a loam core frock of magnesium alloy arc thin wall foundry goods, includes the rectangle bottom plate, its characterized in that: a loam core lower box is fixed on the rectangular bottom plate, and a cross connecting rod is superposed on an upper port of the loam core lower box; the middle parts of four frames of the lower core box are respectively provided with a lower core box semicircular hole with an upward opening, four support rods of the cross connecting rod are respectively embedded in the corresponding lower core box semicircular holes and are coaxial with each other, the upper part of the lower core box is superposed and connected with an upper core box, the middle parts of lower ports of the four frames of the upper core box are respectively provided with an upper core box semicircular hole with a downward opening, and each upper core box semicircular hole and the lower core box semicircular hole are encircled to form a complete core box circular hole; the loam core upper box and the loam core lower box are symmetrically arranged by taking a splicing surface as a center, the inner wall and the outer wall are smoothly spliced in an aligned mode, and the shape of a die cavity formed by the assembly of the loam core upper box and the loam core lower box is the same as that of an inner cavity of the arc-shaped thin-wall casting; the outer ports of four supporting rods of the cross connecting rod are respectively provided with a cross connecting rod screw hole, the middle parts of four edges of the rectangular bottom plate are respectively welded with a bottom plate vertical lug which is erected upwards, the middle part of the height direction of each bottom plate vertical lug is respectively provided with a through bottom plate vertical lug center hole, a loam core positioning shaft matched with the bottom plate vertical lug center hole is respectively inserted in each bottom plate vertical lug center hole, the inner end of each loam core positioning shaft is respectively provided with a screw thread section, and the screw thread sections of each loam core positioning shaft are respectively screwed into the corresponding cross connecting rod screw holes.
2. The loam core frock of magnesium alloy arc thin wall foundry goods of claim 1 characterized in that: the rectangular bottom plate is provided with a plurality of bottom plate positioning holes, bottom plate positioning pins are respectively inserted into the bottom plate positioning holes, the four corners of the lower end of the loam core lower box are respectively provided with loam core lower box positioning holes, and the upper ends of the bottom plate positioning pins are respectively inserted into the corresponding loam core lower box positioning holes.
3. The loam core frock of magnesium alloy arc thin wall foundry goods of claim 1 characterized in that: the four corners of the lower end of the upper core box are respectively provided with a core lower box positioning hole, a core lower box positioning pin is inserted into each core lower box positioning hole, a core upper box positioning hole is arranged at each corner of the lower end of the core upper box, and each core lower box positioning pin is inserted into the corresponding core upper box positioning hole.
4. The mud core tool for the magnesium alloy arc thin-wall casting according to claim 1, 2 or 3, characterized in that: the long shaft of the cross connecting rod extends along the axis of the length direction of the bottom plate, and the outer ends of the long shaft and the short shaft respectively and symmetrically exceed the inner wall of the die cavity of the mud core box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221234466.4U CN217551088U (en) | 2022-05-18 | 2022-05-18 | Loam core frock of magnesium alloy arc thin wall foundry goods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221234466.4U CN217551088U (en) | 2022-05-18 | 2022-05-18 | Loam core frock of magnesium alloy arc thin wall foundry goods |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217551088U true CN217551088U (en) | 2022-10-11 |
Family
ID=83499664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221234466.4U Active CN217551088U (en) | 2022-05-18 | 2022-05-18 | Loam core frock of magnesium alloy arc thin wall foundry goods |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217551088U (en) |
-
2022
- 2022-05-18 CN CN202221234466.4U patent/CN217551088U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105328120A (en) | Transverse-molding and vertical-casting casting molding method for casting | |
| CN217551088U (en) | Loam core frock of magnesium alloy arc thin wall foundry goods | |
| CN210435318U (en) | Casting mold for producing special-shaped castings | |
| CN108513469A (en) | A kind of center production method, center and electronic device | |
| CN205165741U (en) | Horizontal type vertical stroke of foundry goods is watered sand mould and is erect turning device | |
| CN104493098B (en) | A kind of core manufacture method of many inner cavity revolution body structural member | |
| CN213162988U (en) | Casting chill mold capable of being used for rapid production change | |
| CN104493099B (en) | The core of many inner cavity revolution body structural member | |
| CN217749240U (en) | Mud core shaping tool for magnesium alloy inner spherical surface casting | |
| CN114713768B (en) | Casting technology of thin-wall discontinuous magnesium alloy spherical shell of aircraft detector | |
| CN210996381U (en) | Die-casting mold core capable of realizing one-step molding of aircraft tail wing | |
| CN217901331U (en) | Tensile sample sand mold structure for low pressure casting | |
| CN219335880U (en) | Ultralow temperature ball valve casting mould | |
| CN217749229U (en) | Swing pouring device for thin-wall magnesium alloy shell | |
| CN114453558B (en) | Casting device for large conical titanium alloy shell castings | |
| CN213944776U (en) | Train pair wheel casting mould | |
| CN210359140U (en) | Mould assembly for casting cylinder cover of compressor of oil extraction machine | |
| CN217018510U (en) | Cylinder body casting chaplet with preset positioning structure | |
| CN104924530B (en) | A kind of plastic compression mould for miniature electronic fuse part | |
| JPH11191942A (en) | Stator core for frameless motor, manufacture of the stator core and molding die for internal chill for manufacturing the stator core | |
| CN213162934U (en) | Universal die bottom plate for sand casting and manual molding | |
| CN215315504U (en) | Drum-shaped flange wax mold integrated forming mold | |
| CN216938285U (en) | Cope and drag formula thrust wheel side cap sand box mould structure | |
| CN214236171U (en) | Wax module tree of compressor balancing piece | |
| CN212419537U (en) | Casting sand box suitable for casting various models |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |