CN216758113U

CN216758113U - Complex cross beam casting system

Info

Publication number: CN216758113U
Application number: CN202220182624.XU
Authority: CN
Inventors: 李远发; 谭魏; 郭族帆; 郑梁; 陈炎; 宋卓能; 陈善荣
Original assignee: Ka Fung Industrial Technology Huizhou Co ltd
Current assignee: Ka Fung Industrial Technology Huizhou Co ltd
Priority date: 2022-01-21
Filing date: 2022-01-21
Publication date: 2022-06-17
Anticipated expiration: 2032-01-21

Abstract

The utility model discloses a complex cross beam casting system, relates to the technical field of magnesium alloy gravity casting, and solves the problem of large complex thin-wall cross beam casting through magnesium alloy gravity. The complex beam casting system comprises a pouring gate; wherein the inlet runner has an inlet end and an outlet end, the outlet end for communicating with the mold cavity; the pouring channels are multiple and are respectively communicated with different parts of the die cavity. The plurality of the feeding gates are communicated with different parts of the casting die cavity, and when casting is carried out, casting can be carried out simultaneously from the plurality of parts of the casting die cavity, so that the flowing stroke of casting liquid is reduced, casting can be completed quickly, and the cold shut defect caused by quick cooling of alloy melt is avoided. In addition, a plurality of exhaust risers are arranged and connected with different parts of the casting die cavity, so that all parts of the casting die cavity can exhaust in the casting process, and the defect of sand holes caused by air entrainment is avoided.

Description

Complex cross beam casting system

Technical Field

The utility model relates to the technical field of casting equipment, in particular to a complex cross beam casting system.

Background

The casting produced by the die-casting process has the advantages of good moldability, strong impact resistance and the like, and can effectively ensure the impact resistance of the casting, particularly the part of the casting with weaker mechanical properties in the traditional sense, such as a thinner corner, and the like.

In the die casting process, the molten liquid for casting can be rapidly cooled after being injected into the die, and the cooled molten liquid cannot continue to extend and flow in the die, so that the casting can be failed to manufacture, and the casting needs to be completed in time before the molten liquid is cooled. Among them, for castings with complex structures such as magnesium alloy automobile instrument panel beams (Cross Car beams, CCB for short), because of the complex structure, the flow channel of the molten liquid is lengthened in the casting process, especially for finer Beam bones, and the like, the existing casting system is often prone to defects such as insufficient cast-in-place, and the castings cannot be cast completely. In view of the defects, if the casting pressure is increased, defects such as cracks are likely to be caused. At present, the CCB produced is mainly made of steel and cannot be effectively integrally formed during casting, the size precision of the CCB made of the steel is low, the size precision is poor, and welding is still needed for splicing at a fine rib beam; moreover, the CCB made of steel has weak alkali corrosion resistance, high cost and low cost performance.

In addition, when the existing casting system carries out the casting of the complex cross beam of the type, the serious condition of insufficient exhaust exists, the defects of air entrainment and the like occur, so that the casting has air holes, the mechanical property of the casting is seriously influenced, and the quality of the casting cannot meet the use requirement.

SUMMERY OF THE UTILITY MODEL

The utility model provides a complex cross beam casting system, aiming at solving the defects that the existing casting system is easy to have insufficient casting, can not finish casting, cracks, insufficient exhaust and the like when casting a complex cross beam.

The purpose of the utility model is realized by the following technical scheme.

A complex beam casting system comprises a sprue; the inlet runner is provided with an inlet end and an outlet end, the outlet end of the inlet runner is communicated with the casting mold cavity, and the cast melt can be injected from the inlet end of the inlet runner and flows into the casting mold cavity through the inlet runner;

the pouring channels are multiple and are respectively communicated with different parts of the die cavity.

In a preferred embodiment, the sprue is a sprue; and the inlet channel is vertical to the plane of the casting mould cavity.

In a preferred embodiment, the outlet ends of a plurality of said gates communicate with said mold cavities at different heights.

In a more preferable embodiment, the bottom of the outlet end of the pouring gate is provided with a straight pouring pit; the straight pouring gate pit is communicated with the feeding gate and the casting mold cavity.

In a more preferred embodiment, the outlet of the sprue cup in communication with the mold cavity is higher than the bottom of the sprue cup.

In a more preferred embodiment, the inner bottom surface of the straight casting pit is a circular arc surface.

In a preferred embodiment, the outlet end of the sprue is in communication with the mold cavity via an ingate; the cross-sectional area of the ingate is smaller than the cross-sectional area of the ingate.

In a more preferred embodiment, the number of the ingates is at least two, and the casting liquid flows into the mold cavity in directions away from each other in the two ingates during casting.

As a preferred embodiment, the inlet end of the pouring channel is provided with a pouring cup; the pouring cup is provided with a wide opening with the caliber gradually reduced along the pouring direction.

In a preferred embodiment, an exhaust riser is further provided in the complex beam casting system described in any one of the above embodiments; the exhaust riser is in communication with the mold cavity.

In a more preferred embodiment, the vent head is provided in plurality, and the plurality of vent heads communicate with different portions of the mold cavity.

Further, the exhaust riser is arranged at least at the position between two inlet runners connected with the mold cavity or corresponding to the tail end or the thin wall of the casting.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

according to the complex cross beam casting system, the plurality of the feeding gates are communicated with different parts of the casting mold cavity, when casting is carried out, casting liquid is simultaneously cast from the plurality of parts of the casting mold cavity through the plurality of the feeding gates, and the feeding gates are communicated with the casting mold cavity through the plurality of the inner pouring gates, so that the flowing stroke of the casting liquid is greatly reduced, the temperature distribution and the solidification sequence adjustment of different parts of a casting are carried out, the casting is rapidly finished, the cold shut defect caused by rapid cooling of alloy liquid is avoided, the problems of insufficient pouring and incapability of finishing casting are solved, and the production of the casting is ensured.

The pouring gate is a straight pouring gate, the pouring cup is arranged at the inlet end of the pouring gate, the straight pouring gate pit is arranged at the bottom of the pouring gate, the pouring of casting liquid can be assisted by the pouring cup, the turbulent flow region and the pouring pressure are adjusted and distributed by the straight pouring gate pit, the molten liquid can be rapidly and greatly introduced, and the molten liquid can smoothly flow into the casting mold cavity, so that the rapid completion of the pouring operation is further ensured.

In addition, set up a plurality of exhaust risers, a plurality of exhaust risers are connected with the different positions in mould chamber, make each position in the casting process mould chamber all can exhaust, greatly avoid the gassing, avoid the gassing to produce the sand hole defect, and then avoid the formation of gas pocket in the foundry goods, effectively guarantee the product quality of foundry goods.

The complex cross beam casting system disclosed by the utility model is used for casting the complex cross beam, so that the complex cross beam can be integrally formed by die casting, the production efficiency is high, the process is simplified, welding is not required, the die casting size precision is high, and the size is accurate and stable. Particularly, when CCB is cast, the production purpose of replacing steel with light magnesium alloy is realized, so that the produced CCB is light in weight, the weight reduction purpose is achieved, the light weight reduction target reaches more than 40%, the alkali corrosion resistance is higher, the cost is low, and the cost performance is high.

Drawings

FIGS. 1 and 2 are schematic diagrams of the complex beam casting system of the present invention in different angles of the axis side structure during casting operation in an embodiment;

FIG. 3 is a schematic view of the structure of the sprue with the sprue cup, the sprue cup and the ingate;

FIG. 4 is a schematic cross-sectional view of the pouring cup;

FIG. 5 is a schematic cross-sectional view of a sprue cup in the sprue gate;

FIG. 6 is a schematic structural view of a CCB produced using the complex beam casting system of the present invention;

the attached drawings are marked as follows: 1-pouring gate, 2-casting die cavity, 3-pouring cup, 4-sprue pit, 5-ingate, 6-exhaust riser, 7-melt and 8-casting.

Detailed Description

The technical solutions of the present invention are further described in detail below with reference to specific examples and drawings, but the scope and implementation of the present invention are not limited thereto.

In the description of the specific embodiments, it should be noted that the terms "top," "bottom," "upper," "lower," "left," "right," and the like are used for distinguishing and descriptive purposes only and not for purposes of indicating or implying that a particular structure or element must have a particular orientation, be constructed and operative in a particular orientation, and are not intended to indicate or imply relative importance.

Unless expressly stated or limited otherwise, the terms "mounted," "disposed," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The complex beam casting system of the present invention can be used for casting CCBs, and obviously, the casting system is not limited to casting production of CCBs, and can be applied to similar complex beams. Moreover, based on the casting system, the components of the casting system are subjected to suitable adjustment within a proper range according to the structure of a specific casting, and casting production and use can be provided for various complex castings outside the complex cross beam.

Example one

When the complex cross beam casting system is used for casting, the casting 8 is formed in a die-casting mode. The mold has a mold cavity 2 adapted to the shape of the product casting, and the mold cavity 2 is an internal cavity structure integrally communicated with the mold cavity 2, so that the melt 7 can flow inside the mold cavity 2 and be integrally formed into the desired casting 8 after cooling. The complex beam casting system of the utility model can cast the melt 7 for the casting cavity 2 in the die during the die-casting molding, so that the melt 7 can be molded in the casting cavity 2 smoothly.

According to the material composition of the casting 8 produced by actual die casting, the melt 7 is specifically a material melt of the corresponding casting 8, and if the casting 8 is CBB, the corresponding melt 7 is a magnesium alloy melt of the CCB casting. Moreover, the actually used mold can be made of various heat-resistant materials, for example, when the casting 8 is CCB, the adopted mold is a sand mold; alternatively, recessed cavities are preformed in the inner surfaces of the sand molds that are clamped together, and these cavities can be formed together as the mold cavity 2 after clamping.

Referring to fig. 1 and 2, the complex beam casting system of the present invention specifically includes an inlet runner 1. The gate 1 can be a separate casting channel or a casting channel integrally formed on the mold, and in the specific embodiment shown in fig. 1 and 2, the gate 1 is designed as a separate casting channel. In addition, when the pouring gate 1 is used for pouring, the pouring gate and the casting cavity 2 of the mold are communicated with each other, and a pouring and flowing channel can be provided for the molten liquid 7 to enter the casting cavity 2 in the pouring process. Specifically, the inlet runner 1 is provided with an inlet end and an outlet end, wherein the inlet end is arranged at the top of the inlet runner 1, the outlet end is arranged at the bottom of the inlet runner 1, and a flow passage is arranged between the inlet end and the outlet end; furthermore, the inlet end of the pouring gate 1 is arranged away from the mold, for example, above the mold, a pouring gate communicated with the casting cavity 2 is arranged on the mold, and the outlet end of the pouring gate 1 is communicated with the pouring gate, so that the pouring gate 1 is communicated with the casting cavity 2.

In the die casting, the melt 7 is poured from the inlet end of the sprue 1, and the poured melt flows in the runner of the sprue 1 to the outlet end of the sprue 1 and flows into the mold cavity 2, and is finally molded in the mold cavity 2.

In a preferred embodiment, and referring again to fig. 1 and 2, in the complex beam casting system, the sprue 1 is provided in plurality. Wherein, a plurality of advance to water 1 and carry out the intercommunication with mould chamber 2 according to foundry goods 8's structure and arrange, make a plurality of advance to water 1 respectively with the different positions intercommunication in mould chamber 2, it sets up the principle for specifically arranging can make each advance the most distant point apart from this advance to water 1 that waters that 1 outflow fused liquid 7 flows into in arriving in the mould chamber 1 basically simultaneously to set up, greatly reduce the flow stroke of fused liquid 7 in mould chamber 1, thereby realize accomplishing the casting fast, avoid watering inadequately and can't accomplish the defect of casting, guarantee the production of foundry goods 8. Of course, in the case of a more complex structure of the casting 8, if there are finer connecting structures, the melt 7 does not easily flow into the mold cavity 2 at the time of casting at the positions corresponding to the finer connecting structures, and it is also possible to arrange that the corresponding sprue 1 communicates with the mold cavity 2 at the positions to ensure perfect die-casting of the corresponding fine connecting structures at the positions.

Further, the outlet ends of the plurality of gates 1 have different heights, and the outlet ends of the plurality of gates 1 have different heights at the communication with the mold cavity 2 during casting. Therefore, the melt 7 injected into each sprue 1 can be of a layered injection type, and when a plurality of sprues 1 are used for simultaneous casting, the filling can be realized layer by layer, so that the filling is stable, sequential solidification and feeding supplement are facilitated, and the casting of a cross beam with a complex shape, in particular the casting of large and medium castings 8 with a complex shape and a large height, is realized.

As in the particular embodiment shown, for die casting of a CCB, the sprue 1 is provided in eight. The eight feeding channels 1 are mainly divided into left three and right four left and right two rows, the left and right two rows correspond to left and right main beams of the CCB, the feeding channels 1 in the left and right two rows are basically uniformly distributed and communicated with a casting mold cavity 2, the three feeding channels 1 on the left side correspond to high positions of the CCB, and the outlet ends of the three feeding channels 1 on the left side are higher than the outlet ends of the four feeding channels 1 on the right side; in addition, a pouring channel 1 is arranged to be communicated with the middle position of the mold cavity 2, the position corresponds to the position with more thin beams in the middle of the CCB, and the casting yield of the thin beams in the middle of the CCB can be improved.

In a preferred embodiment, please refer to fig. 1 and fig. 2 again, an exhaust riser 6 is further disposed in the complex beam casting system, and is used for exhausting the molten liquid 7 into the mold cavity 2 during casting molding, so as to avoid air entrainment, further avoid formation of air holes in the casting 8, and effectively ensure product quality of the casting 8. Specifically, the exhaust riser 6 is a straight-bar pipeline, the bottom of the exhaust riser is communicated with the casting mold cavity 2, and the top of the exhaust riser is open and directly communicated with the outside; and optionally, the venting riser 6 may be a separate venting conduit or a venting conduit integrally formed with the mold, as in the embodiment shown in fig. 1 and 2, the venting riser 6 is designed as a separate venting conduit.

Moreover, a plurality of exhaust risers 6 are provided. Wherein, a plurality of exhaust risers 6 are communicated with different parts of the casting die cavity 2, and exhaust is realized by utilizing the principle of a communicator. And an exhaust riser 6 is provided in communication at least between the channels connecting the two gates 1 of the mold cavity 2, preferably at the farthest point from the gate 1 where the melt 7 flowing out of each gate 1 flows into the mold cavity 1, and the exhaust riser 6 is provided at the end or thin wall corresponding to the casting 8. In the particular embodiment shown in fig. 1 and 2, in the die casting of the CCB, the venting risers 6 are provided at the middle, at the ends and at the thin walls of the connecting beam sections corresponding to the CCB.

In die casting, the melt 7 flows into the cavity 2 through the plurality of gates 1, and casting is performed, and the gas in the cavity 2 is squeezed while the melt 7 flows in the cavity 2. At this time, the gas can be discharged from the degassing riser 6 to the outside, so that the gas trapping in the cavity 2 is avoided, and the level of the melt 7 is controlled, thereby ensuring the molding quality of the casting 8.

Example two

The present embodiment is the same as the first embodiment. Further, as shown in fig. 1 to fig. 3, in the complex beam casting system of the present embodiment, the sprue 1 is a sprue having a length from top to bottom. In addition, when the casting system performs casting of the casting 8, the sprue 1 of the sprue structure is perpendicular to the plane of the casting cavity 2, so that the conduction pressure of the molten liquid 7 to the casting 8 can be increased in the process of draining the molten liquid 7 during casting, and the die casting performance of the casting 8 is improved.

Further, a pouring cup 3 is provided at the inlet end of the sprue 1, the pouring cup 3 being adapted to receive the melt 7 from the ladle and to introduce the melt 7 into the sprue 1 of the sprue structure. Specifically, as shown in fig. 4, the pouring cup 3 has a wide mouth with a gradually decreasing diameter along the pouring direction, so that the pouring cup 3 can quickly receive a large amount of melt 7 to assist in quick pouring.

Furthermore, a straight runner nest 4 is arranged at the bottom of the outlet end of the sprue 1, so that the impact of the melt 7 injected from the sprue 1 of the straight runner structure on the bottom casting mold of the sprue 1 can be buffered, the turbulent flow area of the melt 7 in the bottom area is shortened, the pressure and flow distribution in the sprue 1 are improved, the local resistance coefficient and pressure loss at the corner are reduced, and good die-casting molding is realized.

Specifically, as shown in fig. 3 and 5, the sprue 4 is disposed at the bottom of the sprue 1, and the sprue 4 is communicated with the sprue 1 and the mold cavity 2. The outlet of the straight pouring gate pit 4 communicating with the mold cavity 2 is higher than the bottom of the straight pouring gate pit 4. Therefore, before the melt 7 is injected into the sprue 1 from top to bottom and flows into the mold cavity 2, the melt 7 can be injected downwards to the sprue bush 4, the injection pressure of the melt 7 is buffered by the sprue bush 4, and then the melt 7 with the liquid level reaching the height of the outlet of the sprue bush 4 communicated with the mold cavity 2 flows into the mold cavity 2, so that the die-casting pressure on the casting 8 can be improved.

In addition, referring to fig. 5 again, the inner bottom surface of the direct casting runner cavity 4 is designed to be a circular arc surface, and specifically, the inner peripheral angles of the bottom of the direct casting runner cavity 4 are all circular arc angles, so that the remaining time of the melt 7 at the bottom of the direct casting runner cavity 4 can be effectively avoided, and the turbulent flow zone of the melt 7 in the direct casting runner cavity 4 when the melt flows into the casting mold cavity 2 is shortened.

EXAMPLE III

The present embodiment is the same as the first or second embodiment. Further, referring to fig. 1 to fig. 3, in the complex beam casting system of the present embodiment, the outlet end of the inlet runner 1 is communicated with the casting cavity 2 through the inner runner 5. As a final runner of this casting system, communication between the sprue 1 and the mold cavity 2 is performed by the ingate 5 at the time of casting, and the melt 7 in the sprue 1 can be directly introduced into the mold cavity 2.

Specifically, the cross-sectional area of the ingate 5 is smaller than the cross-sectional area of the ingate 1. When casting, the melt 7 flows into the ingate 5 with a small cross section area from the ingate 1 with a large cross section area, so that large casting pressure can be formed, the flow speed at the outlet of the ingate 5 becomes fast, the scouring force to the casting mold and the die is increased, and the filling of large castings is facilitated.

Further, referring to fig. 1 to 3, a single sprue 1 is connected to the mold cavity 2 through at least two ingates 5, and the flow and conduction directions of the ingates 5 are different to distribute the flow rate of the melt 7 and control the filling speed and direction. In the embodiment shown in fig. 1 to 3, the single ingate 1 is communicated with the casting cavity 2 through two ingates 5, the two ingates 5 are respectively arranged and communicated at the left side and the right side of the ingate 1, and the flow conducting directions of the two ingates 5 are respectively at the left front side and the right front side.

In a preferred embodiment, among a plurality of ingates 5 connected to a single ingate 1, the tail end of a part of the ingates 5 can be communicated with the casting cavity 2 and the near end of the ingate 1, and the tail end of a part of the ingates 5 can be communicated with the casting cavity 2 and the far end of the ingate 1, so that the casting and mold filling at a far position can be supplemented, the distribution of the molten liquid 7 is uniform, the temperature distribution and the solidification sequence of different parts in the casting 8 can be adjusted, the casting can be rapidly finished, and the product quality of the casting 8 is ensured.

Example four

The complex beam casting system is adopted to cast and produce CCB beams, wherein AM60B magnesium alloy is used as the material of the CCB beams, and as shown in figure 6, the size of the produced product is accurately controlled at 1877 x 436 x 462mm, and the weight of the product is 4.6 kg.

The mechanical property test of the produced AM60B magnesium alloy CCB is carried out, a sample piece mechanical property test (test bar) is completed according to GBT228.1, and the tensile strength, the yield strength and the elongation at break of the AM60B magnesium alloy CCB are measured to be more than or equal to 240mMpa, more than or equal to 130MPa and more than or equal to 10 percent; the Brinell hardness of the material according to GBT231.1 is more than or equal to 58HBW (sample block). The test result shows that the cast AM60B magnesium alloy CCB has excellent comprehensive properties.

The above embodiments are only preferred embodiments of the present invention, and the technical solutions of the present invention are described in further detail, but the above descriptions are exemplary, not exhaustive, and are not limited to the disclosed embodiments, the scope and implementation manner of the present invention are not limited thereto, and any changes, combinations, deletions, substitutions, or modifications without departing from the spirit and principle of the present invention will be included in the scope of the present invention.

Claims

1. A complex cross beam casting system is characterized by comprising a pouring gate; the inlet runner is provided with an inlet end and an outlet end, the outlet end of the inlet runner is communicated with the casting mold cavity, and the cast melt can be injected from the inlet end of the inlet runner and flows into the casting mold cavity through the inlet runner; the inlet gates are multiple and are respectively communicated with different parts of the casting mold cavity, and the outlet ends of the inlet gates and the casting mold cavity are different in height.

2. The complex beam gating system of claim 1, wherein the ingate is a sprue; and the inlet channel is vertical to the plane of the casting mould cavity.

3. The complex beam casting system according to claim 2, wherein a straight runner nest is arranged at the bottom of the outlet end of the inlet runner; the straight pouring gate pit is communicated with the feeding gate and the casting mold cavity.

4. A complex beam casting system according to claim 3, wherein the outlet of the sprue cup in communication with the mould cavity is higher than the bottom of the sprue cup.

5. The complex beam casting system as defined in claim 3, wherein the inner bottom surface of the sprue pocket is a circular arc surface.

6. A complex beam gating system according to claim 1, wherein the outlet end of the ingate communicates with the mold cavity through an ingate; the cross-sectional area of the ingate is smaller than the cross-sectional area of the ingate.

7. The complex beam gating system of claim 6, wherein the number of the ingates is at least two, and casting liquid flows into the mold cavity in the two ingates in directions away from each other during casting.

8. The complex beam gating system of claim 1, wherein the inlet end of the sprue is provided with a pouring cup; the sprue cup is provided with a wide mouth with the caliber gradually reduced along the pouring direction.

9. The complex beam casting system according to any one of claims 1 to 8, wherein an exhaust riser is provided; the exhaust riser is in communication with the mold cavity.

10. The complex beam gating system of claim 9, wherein the strain relief is a plurality of strain relief ports, the plurality of strain relief ports being in communication with different portions of the mold cavity; and the exhaust riser is arranged at least at the position between the two feeding channels connected with the casting cavity or the position corresponding to the tail end or the thin wall of the casting.