CN213256964U

CN213256964U - Sand core for casting hub

Info

Publication number: CN213256964U
Application number: CN202021312291.5U
Authority: CN
Inventors: 赵清学; 王胜利; 张自强; 卢坤
Original assignee: Henan Jielang Precision Machine Tool Co ltd
Current assignee: Henan Jielang Precision Machine Tool Co ltd
Priority date: 2020-07-07
Filing date: 2020-07-07
Publication date: 2021-05-25
Anticipated expiration: 2030-07-07

Abstract

The utility model discloses a casting psammitolite technical field's a wheel hub foundry sand core, including the core that has hollow structure the outside of core is equipped with the sand bed, the both ends of core are equipped with positioning screw, positioning screw's one end runs through the sand bed, just the inside cavity of positioning screw is in order to form the interface channel who is linked together with the core inner chamber, the core outside is equipped with air guide hole and annular connection piece. The utility model provides a psammitolite comprises hollow structure's core and external application sand bed, and the hollow structure's that the core both ends set up positioning screw not only is convenient for the location of psammitolite, also is convenient for the interior gaseous discharge of psammitolite and the cooling of psammitolite, can also reduce the quantity of molding sand.

Description

Sand core for casting hub

Technical Field

The utility model relates to a casting psammitolite technical field, concretely relates to sand core is used in hub casting.

Background

The wheel hub is a cylindrical metal part which is used for supporting the tire in the tire by taking a wheel axle as a center, is an important part for connecting a brake drum, a wheel disc and a half shaft and is positioned at the center of the wheel for mounting the axle in a popular way, and the integral rigidity and the strength of the structure of the wheel hub are the keys for safe operation of the wheel. 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 the sand core is placed in a casting sand box to obtain a hollow hub blank through gravity or low-pressure casting, then the sand core with the resin material in the sand core being invalid is changed into sand through a specific temperature, and the sand is poured out of the hub blank to obtain the hollow hub.

After the sand core is placed in the sand box, if the sand core is unstable, finished products can be scrapped due to displacement in the hub casting and forming process, and meanwhile, the casting is longer in forming time due to the fact that the heat conduction efficiency of the molding sand is lower. Therefore, how to fix and cool the sand core becomes a problem to be solved urgently.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a sand core for hub casting.

The utility model discloses the technical scheme who adopts does:

the design is a sand core for casting of a hub, and comprises a core body with a hollow structure, wherein a sand layer is arranged on the outer side of the core body, positioning screws are arranged at two ends of the core body, one ends of the positioning screws penetrate through the sand layer, and the inner parts of the positioning screws are hollow so as to form a connecting channel communicated with an inner cavity of the core body.

Preferably, the core body is provided with air vents.

Preferably, the outer side of the core body is provided with an annular connecting sheet.

Preferably, the core body comprises an upper core body and a lower core body which are magnetically attracted to each other, the upper core body is provided with a connecting groove, and the lower core body is provided with a connecting block corresponding to the connecting groove.

Preferably, a first magnet is arranged on the inner side of the upper core body, and a second magnet is arranged on the inner side of the lower core body.

Preferably, the core body further comprises a spoke, a first slot is arranged at the joint of the upper core body and the lower core body, and one end of the spoke is inserted into the first slot.

Compared with the prior art, the utility model has the advantages that:

1. the utility model provides a psammitolite comprises hollow structure's core and external application sand bed, and the location of the psammitolite of not only being convenient for of the positioning screw that has hollow structure that the core both ends set up, the internal gaseous discharge of sand of also being convenient for and the cooling of psammitolite can also reduce the quantity of molding sand.

2. The utility model discloses it has the spoke to peg graft in the outside of core, and the casting of being convenient for has hollow structure's spoke to the weight of greatly reduced spoke.

Drawings

Fig. 1 is one of the schematic structural diagrams of the present invention;

fig. 2 is a second schematic structural diagram of the present invention;

FIG. 3 is a schematic view of the spoke construction;

FIG. 4 is a reference diagram of the utility model in use;

1 is the core, 2 is the sand bed, 3 is the positioning screw, 4 is the connecting channel, 5 is the air guide hole, 6 is the annular connection piece, 7 is the upper core body, 8 is the lower core body, 9 is first magnet, 10 is the second magnet, 11 is the connecting groove, 12 is the connecting block, 13 is first slot, 14 is the spoke, 15 is the spoke piece, 16 is the second slot, 17 is the inserted block, 18 is the second through-hole, 19 is the elastic cord, 20 is the drag flask, 21 is the bottom plate, 22 is the second through-hole, 23 is fastening nut, 24 is the cope flask, 25 is the roof.

Detailed Description

The following embodiments are only intended to illustrate the present invention in detail, and do not limit the scope of the present invention in any way. The unit module components, structures, mechanisms, sensors and other devices referred to in the following examples are all conventional and commercially available products unless otherwise specified.

Example 1: as shown in fig. 1, a sand core for hub casting, including core 1 with hollow structure, core 1 is the good conductor of heat, be equipped with sand layer 2 in the outside of core 1, the both ends of core 1 are equipped with positioning screw 3, and positioning screw 3's one end runs through sand layer 2, the inside cavity of this positioning screw 3 is in order to form the connecting channel 4 who is linked together with core 1 inner chamber, be equipped with air guide hole 5 and annular connection piece 6 on the core 1 lateral wall, the intraformational gas of sand gets into core 1 inner chamber through air guide hole 5, annular connection piece 6 both is convenient for core 1 and sand layer 2 to link to each other, also is convenient for the heat transfer of foundry goods and psammitolite.

In this embodiment, the core 1 includes that magnetism inhales the last core 7 and the core 8 that links to each other, goes up the core 7 inboard and is equipped with first magnet 9, and the core 8 inboard is equipped with second magnet 10 down, goes up the core 7 bottom and is equipped with connecting grooves 11, and the core 8 top is equipped with and connects connecting grooves 11 corresponding connecting block 12 down.

Example 2: as shown in fig. 2 and 3, the present embodiment is a further improvement based on embodiment 1, and is different from embodiment 1 in that: a plurality of first slots 13 are arranged at the connecting part of the upper core body 7 and the lower core body 8, spokes 14 are inserted in the first slots 13, the spokes 14 are formed by sequentially connecting a plurality of spoke blocks 15, one end of each spoke block 15 is provided with a second slot 16, the other end of each spoke block 15 is provided with an inserting block 17, meanwhile, a second through hole 18 is arranged in each spoke 14 along the length direction of the spoke 14, an elastic rope 19 is arranged in each second through hole 18, and two ends of each elastic rope 19 are fixedly connected with the spoke blocks 15 at the head end and the tail end.

The operation and use method of the sand core comprises the following steps:

as shown in fig. 4, firstly, the sand core is placed in the lower sand box 20, the bottom end of the positioning screw 3 at the bottom end of the sand core passes through the second through hole 22 of the bottom plate 21, then the nut 23 is screwed tightly on the positioning screw 3, then the upper sand box 24 is sleeved on the sand core, the top plate 25 is pressed on the sand core, the positioning screw 3 at the top end of the sand core passes through the second through hole 22 on the top plate 25, and then the fastening nut 23 is screwed to complete the fixation of the sand core; after liquid aluminum alloy is injected into the cavity, cooling water is injected into the inner cavity of the core body 1 by connecting the positioning screw rod 3 with a water pipe, the sand core and the casting are rapidly cooled, then the cope flask 24 is hoisted, the sand layer 2 on the outer side of the core body 1 is removed, and the core body 1 is taken out.

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent replacements made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims

1. A sand core for hub casting, characterized in that: including the core that has hollow structure the outside of core is equipped with the sand bed, the both ends of core are equipped with positioning screw, positioning screw's one end runs through the sand bed, just positioning screw inside cavity is in order to form the interface channel who is linked together with the core inner chamber.

2. The sand core for hub casting according to claim 1, wherein: and the core body is provided with an air guide hole.

3. The sand core for hub casting according to claim 1, wherein: and an annular connecting sheet is arranged on the outer side of the core body.

4. The sand core for hub casting according to claim 1, wherein: the core body comprises an upper core body and a lower core body which are magnetically attracted, wherein the upper core body is provided with a connecting groove, and the lower core body is provided with a connecting block corresponding to the connecting groove.

5. The sand core for hub casting according to claim 4, wherein: the inner side of the upper core body is provided with a first magnet, and the inner side of the lower core body is provided with a second magnet.

6. The sand core for hub casting according to claim 5, wherein: the core body further comprises a spoke, a first slot is formed in the joint of the upper core body and the lower core body, and one end of the spoke is inserted into the first slot.