CN209753949U - Hollow hub sand core positioning device - Google Patents
Hollow hub sand core positioning device Download PDFInfo
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- CN209753949U CN209753949U CN201920335838.4U CN201920335838U CN209753949U CN 209753949 U CN209753949 U CN 209753949U CN 201920335838 U CN201920335838 U CN 201920335838U CN 209753949 U CN209753949 U CN 209753949U
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Abstract
The utility model provides a hollow wheel hub sand core positioning device, which solves the technical problems of the existing hollow wheel hub sand core positioning device that the positioning is inclined, the wheel hub manufacturing rate is low and the potential safety hazard exists; the sand core positioning device comprises an upper die, a lower die, a sand core and a positioning connecting rod, wherein the upper section of the positioning connecting rod is detachably and fixedly connected with the upper die; a sand core locking part and a positioning part are arranged on the lower section of the positioning connecting rod from bottom to top, the sand core locking part is positioned in the sand core, and a positioning shunt sleeve is sleeved outside the positioning part; the bottom of the positioning flow-dividing sleeve is provided with a conical boss, and the sand core is provided with a conical groove matched with the sand core. The utility model discloses the wide application is in cavity wheel hub casting technical field.
Description
Technical Field
The utility model relates to a positioner especially relates to a cavity wheel hub psammitolite positioner.
background
The hollow hub is produced by using precoated sand to produce a sand core which is the same as a hollow area in advance, then fixing the sand core into a casting mould, obtaining a hollow hub blank through gravity or low-pressure pouring, changing the resin material in the sand core into sand through a specific temperature, and pouring the sand out of the hub blank to obtain the hollow hub.
At present, in the process of fixing the sand core to a casting mold, the sand core positioning is carried out by adopting the opening of the hub part of the wheel hub or the side mold of the spoke, the hollow wheel hub obtained by the method has low internal quality due to poor air exhaust of the sand core, and the surface of the wheel hub is bound to be provided with at least one hole, thereby influencing the appearance of the product.
In order to solve the problems, the Chinese patent application with the application number of 201120056445.3 discloses a structure for fixing a sand core in a wheel mold, which comprises an upper mold, a lower mold and the sand core, and further comprises a connecting rod, one section of the connecting rod is embedded in the sand core, a locking device is arranged on the upper mold, the locking device locks the exposed section of the connecting rod, the locking device consists of a lock seat and a lock handle, the lock seat is fixed on the upper mold, the exposed section of the connecting rod penetrates into the lock seat, a lock tongue is arranged at one end of the lock handle, and the lock tongue is inserted into the lock seat to lock the connecting rod.
However, it still has the following problems:
1. The rotation of the sand core cannot be limited, and the rotation of the sand core can cause the thickness of one side wall of the spoke of the product to be thin and the thickness of one side wall of the spoke to be thick;
2. The connecting rod and the lock seat are in clearance fit, and the sand core is necessarily deflected when the locking stress of the clearance fit is dead, so that the wall thickness in the product is uneven, and the manufacturing rate is low; and the deflection size can be enlarged along with the radial diameter, and when a large-size hub or a hollow position is large, the hub can be even scrapped or potential safety hazards can be caused.
3. The sand core has no vent hole, the gas in the sand core is not well discharged during casting, the gas hole is easy to appear in the product, and the product quality is poor.
disclosure of Invention
The utility model discloses to the technical problem that the rate is low and have the potential safety hazard to current cavity wheel hub psammitolite positioner location incline, wheel hub make, provide a location not incline, wheel hub make the rate high and do not have the cavity wheel hub psammitolite positioner of potential safety hazard.
Therefore, the utility model adopts the technical scheme that the sand core positioning device comprises an upper die, a lower die, a sand core and a positioning connecting rod, wherein the upper section of the positioning connecting rod is detachably and fixedly connected with the upper die; a sand core locking part and a positioning part are arranged on the lower section of the positioning connecting rod from bottom to top, the sand core locking part is positioned in the sand core, and a positioning shunt sleeve is sleeved outside the positioning part; the bottom of the positioning flow-dividing sleeve is provided with a conical boss, and the sand core is provided with a conical groove matched with the sand core.
Preferably, the lower section of the positioning part is provided with a conical positioning surface, and the outer diameter of the bottom end of the conical positioning surface is larger than that of the top end; the lower section of the inner hole of the positioning shunting sleeve is provided with a conical through hole matched with the conical positioning surface, and the upper section of the inner hole of the positioning shunting sleeve is provided with a cylindrical through hole matched with the upper section of the positioning part.
Preferably, the positioning connecting rod is axially provided with a hollow through hole.
Preferably, the taper of the tapered locating surface is in the range of 5-15 °.
Preferably, the taper of the conical positioning surface is 9.98-10.02 degrees.
Preferably, the positioning connecting rod upper segment is equipped with the ring groove, and the ring groove is connected with last mould through locking the bolt.
Preferably, the sand core locking part is provided with an annular sand core locking groove.
The beneficial effects of the utility model, the conical shape location connecting rod plays and connects four effects of psammitolite, psammitolite location, psammitolite fixed and psammitolite exhaust. The positioning and shunting sleeve has two functions of matching with the conical positioning connecting rod and shunting the aluminum liquid. The sand core locking part of the positioning connecting rod is embedded into the sand core and fixed with the sand core, and the conical positioning surface of the positioning part is matched with the conical through hole on the positioning shunt sleeve during the hub casting, so that the self-centering close fit is realized. The upper section of the positioning connecting rod is connected with the upper die, and the sand core is fixed to the accurate position of the casting die. The conical boss of the positioning diversion sleeve is matched and positioned with the conical groove arranged on the sand core. The mutual matching ensures that the positioning is not deviated and the manufacturing rate is high. The positioning and supporting of the hollow hub sand core can be easily realized, the safety is improved, and the hollow hub sand core can be applied to most hollow hubs.
Drawings
FIG. 1 is a schematic structural view of a positioning connecting rod, a positioning flow distribution sleeve and a sand core;
FIG. 2 is a schematic structural view of a positioning connecting rod and a sand core;
FIG. 3 is a front view of the positioning rod;
FIG. 4 is a schematic view of the positioning sleeve;
FIG. 5 is a schematic bottom view of the structure of FIG. 4;
Fig. 6 is a schematic view of the positioning of the sand core to the hub mold.
Description of the symbols in the drawings
1. Positioning the connecting rod; 2. positioning a flow distribution sleeve; 3. a sand core; 4. a hub blank; 5. locking the bolt; 6. a conical boss; 7. a tapered recess; 8. a conical positioning surface; 9. a tapered through hole; 10. a cylindrical through hole; 11. a hollow through hole; 12. a circular groove; 13. annular psammitolite locking groove.
Detailed Description
the present invention will be further described with reference to the following examples.
As shown in fig. 1-6, the utility model comprises an upper die, a lower die, a sand core 3 and a positioning connecting rod 1, wherein the upper section of the positioning connecting rod 1 is detachably and fixedly connected with the upper die; a sand core locking part and a positioning part are arranged on the lower section of the positioning connecting rod 1 from bottom to top, the sand core locking part is positioned inside a sand core 3, and a positioning shunting sleeve 2 is sleeved outside the positioning part; the bottom of the positioning flow-dividing sleeve 2 is provided with a conical boss 6, and the sand core 3 is provided with a conical groove 7 matched with the sand core.
The lower section of the positioning part is provided with a conical positioning surface 8, and the outer diameter of the bottom end of the conical positioning surface 8 is larger than that of the top end; the lower section of the inner hole of the positioning shunting sleeve 2 is provided with a conical through hole 9 matched with a conical positioning surface 8, the upper section of the inner hole is provided with a cylindrical through hole 10 matched with the upper section of the positioning part, and the upper part of the positioning connecting rod 1 is locked by the end face of the hole.
the positioning connecting rod 1 is axially provided with a hollow through hole 11, so that gas generated by expansion with heat and contraction with cold of the sand core 3 due to high temperature of aluminum liquid during casting can be discharged conveniently.
The size of the hub shaft is limited, the taper is not too large, the area of the matching surface is reduced due to the increase of the taper, the matching precision is affected, and the taper is too small and is easy to lock. The taper range of the conical positioning surface 8 is 5 degrees to 15 degrees, and the taper of the conical positioning surface 8 of the embodiment is 9.98 degrees to 10.02 degrees.
the upper section of the positioning connecting rod 1 is provided with a circular groove 12, and the circular groove 12 is connected with the upper die through a dead locking bolt 5.
The head of the dead lock bolt 5 is U-shaped.
The sand core locking part is provided with an annular sand core locking groove 13.
The sand core locking groove of this embodiment has two. When the sand core 3 is filled, the sand core locking part of the positioning connecting rod 1 is embedded into the sand core 3 and fixed with the sand core 3, and the conical positioning surface 8 of the positioning part is matched with the conical through hole 9 on the positioning shunt sleeve during the hub casting, so that the self-centering close fit is achieved. The upper section of the positioning connecting rod 1 is connected with the upper die, and the sand core 3 is fixed to the accurate position of the casting die. The conical boss 6 of the positioning diversion sleeve 2 is matched and positioned with the conical groove 7 arranged on the sand core 3.
The working principle is as follows:
Firstly, preheating a sand core 3 mould to a specific temperature, then putting a sand core locking part of a positioning connecting rod 1 into the sand core 3 mould and the positioning shunting sleeve 2, injecting precoated sand through a sand injection port, then preserving heat for a set number of seconds, then solidifying the precoated sand, opening the sand core mould to take out the sand core 3, and embedding the sand core locking part into the sand core 3 to play a role in connection and fixation.
As shown in fig. 6, the positioning shunting sleeve 2 is fixed on a hub casting mold through a positioning pin hole and a positioning pin, the casting mold is preheated to a specific temperature, the mold is opened, the positioning connecting rod 1 penetrates through a middle hole of the positioning shunting sleeve 2, so that a conical boss 6 at the bottom of the positioning shunting sleeve 2 is inserted into a conical groove 7 of the sand core 3, the axial rotation freedom degree of the sand core 3 is limited, a conical positioning surface 8 of the positioning connecting rod 1 is tightly attached to a conical through hole 9 of the positioning shunting sleeve 2, and the axial movement and the radial freedom degree of the sand core 3 are limited. Then the dead bolt 5 is inserted into the circular groove 12 of the positioning connecting rod 1, and the die is closed. At the moment, the sand core 3 is suspended in the hub die through the positioning connecting rod 1, a hub blank 4 is obtained through casting, and the middle sand core 3 is removed to obtain a hollow hub blank 4.
The conical positioning connecting rod 1 has four functions of connecting the sand core 3, positioning the sand core 3, fixing the sand core 3 and exhausting the sand core 3. The positioning and distributing sleeve 2 has two functions of matching with the conical positioning connecting rod 1 and distributing the molten aluminum, and is matched with each other to ensure that the positioning is not deviated, and the manufacturing rate is high. The utility model discloses use extensively nimble, can easily realize the location and the support of cavity wheel hub psammitolite 3, improve the security, can be applied to most cavity wheel hub.
However, the above embodiments are only examples of the present invention, and the scope of the present invention should not be limited thereby, and the replacement of the equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention should be covered by the claims of the present invention.
Claims (7)
1. A hollow hub sand core positioning device comprises an upper die, a lower die, a sand core and a positioning connecting rod, wherein the upper section of the positioning connecting rod is detachably and fixedly connected with the upper die; the positioning connecting rod is characterized in that a sand core locking part and a positioning part are arranged on the lower section of the positioning connecting rod from bottom to top, the sand core locking part is positioned in the sand core, and a positioning shunting sleeve is sleeved on the outer side of the positioning part; the bottom of the positioning flow-dividing sleeve is provided with a conical boss, and the sand core is provided with a conical groove matched with the sand core.
2. The positioning device for the hollow hub sand core according to claim 1, wherein a conical positioning surface is arranged on the lower section of the positioning part, and the outer diameter of the bottom end of the conical positioning surface is larger than that of the top end of the conical positioning surface; the lower section of the inner hole of the positioning flow-dividing sleeve is provided with a conical through hole matched with the conical positioning surface, and the upper section of the inner hole of the positioning flow-dividing sleeve is provided with a cylindrical through hole matched with the upper section of the positioning part.
3. The hollow hub sand core positioning device of claim 2, wherein the positioning connection rod is axially provided with a hollow through hole.
4. the hollow hub sand core positioning device of claim 3, wherein the taper of the tapered positioning surface is in the range of 5 ° to 15 °.
5. The hollow hub sand core positioning device of claim 4, wherein the taper of the tapered positioning surface is between 9.98 ° and 10.02 °.
6. the positioning device for the hollow hub sand core as claimed in claim 1, wherein an annular groove is formed in the upper section of the positioning connecting rod, and the annular groove is connected with the upper die through a dead locking bolt.
7. The hollow hub sand core positioning device of claim 1, wherein the sand core locking portion is provided with a ring-shaped sand core locking slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920335838.4U CN209753949U (en) | 2019-03-15 | 2019-03-15 | Hollow hub sand core positioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920335838.4U CN209753949U (en) | 2019-03-15 | 2019-03-15 | Hollow hub sand core positioning device |
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| Publication Number | Publication Date |
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| CN209753949U true CN209753949U (en) | 2019-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920335838.4U Active CN209753949U (en) | 2019-03-15 | 2019-03-15 | Hollow hub sand core positioning device |
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| CN (1) | CN209753949U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110976781A (en) * | 2020-01-08 | 2020-04-10 | 西华大学 | Sand casting core making process adopting rotary type telescopic core rod |
-
2019
- 2019-03-15 CN CN201920335838.4U patent/CN209753949U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110976781A (en) * | 2020-01-08 | 2020-04-10 | 西华大学 | Sand casting core making process adopting rotary type telescopic core rod |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Hollow wheel hub sand core positioning device Effective date of registration: 20210820 Granted publication date: 20191210 Pledgee: Weihai City Commercial Bank Limited by Share Ltd. high tech branch Pledgor: WEIHAI WANFENG MAGNESIUM S & T DEVELOPMENT Co.,Ltd. Registration number: Y2021980008065 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |