CN216912020U

CN216912020U - High-strength thick and large gray cast iron flywheel pouring system

Info

Publication number: CN216912020U
Application number: CN202123393043.5U
Authority: CN
Inventors: 纪明中
Original assignee: Suzhou Cmb Machinery Co ltd
Current assignee: Suzhou Cmb Machinery Co ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-07-08
Anticipated expiration: 2031-12-30

Abstract

The utility model relates to the technical field of casting systems, in particular to a high-strength thick and large gray cast iron flywheel casting system. The sprue gate comprises a sprue cup, a sprue vertically extending from the bottom of the sprue cup, a main cross gate extending from the bottom of the sprue to two sides in a horizontal symmetrical mode, a second cross gate vertically extending upwards and downwards from the left end of the main cross gate, a bayonet arranged at the right end of the second cross gate and the right end of the main cross gate, a plurality of inner gates communicated with the bayonet, and a plurality of cavities communicated with the inner gates through a plurality of water inlet sheets. The utility model has the advantages that: the utility model disperses the water inlet sheets, one surface is not concentrated, and the other surface is filled with water, each cavity adopts 4 water inlet sheets to distribute water, the water inlet is quick and uniform, the water cannot be concentrated, and the water is dispersed to reduce the difference of temperature fields during solidification shrinkage, thereby improving the quality of castings, and improving the bad inner cavities of the castings and the difference of temperature fields during solidification shrinkage caused by the impact of the concentrated water on sand molds.

Description

High-strength thick and large gray cast iron flywheel pouring system

Technical Field

The utility model relates to the technical field of casting systems, in particular to a high-strength thick and large gray cast iron flywheel casting system.

Background

The high-strength thick gray cast iron automobile flywheel product has the rotating speed of 3000 plus 5000r/min under the high-speed rotating working environment, so that the casting part can reach the following performance standard: 1) the dimensional precision is high, the dimensional tolerance meets the CT6 level, and the interference with connected assembly accessories is prevented; 2) the rotating speed is high, and the requirement on the balance degree is high. 3) The inner cavity of the casting cannot have slag inclusion, pores and cracks.

Most of the prior art adopts centralized single-side water inlet and high pouring temperature, so that slag inclusion and air holes in the inner cavity of a casting can be smoothly discharged, but the difference of temperature fields is large when the casting is solidified and shrunk by the high pouring temperature and the single-side centralized water inlet mode, so that the size of the casting is different and cannot meet the size requirement, and the high pouring temperature and the centralized water inlet mode can also cause a sand mold to be incapable of bearing the condition that the casting is not flushed into the casting to form a non-casting defect. The high temperature can make the foundry goods sintering serious, increases the clearance cost, and the sintering is clear not clean, can lead to adding the positioning deviation man-hour, leads to the foundry goods machining dimension to reach, causes badly.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a high-strength thick gray cast iron flywheel pouring system to overcome the defects in the prior art.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a thick big grey cast iron flywheel the gating system of high strength, it includes the pouring basin, from the sprue of pouring basin bottom vertical extension, from the main horizontal runner of sprue bottom horizontal symmetry to both sides extension, from the vertical upwards of horizontal runner left end and downwardly extending's second horizontal runner, set up the bayonet socket of second horizontal runner and main horizontal runner right-hand member, with a plurality of ingates of bayonet socket intercommunication each other and through a plurality of die cavities that a plurality of income water pieces are linked together with the ingate.

Preferably, all be provided with the cassette at the intermediate portion of the main cross gate of both sides, the income water flow proportion of the main cross gate in left side, the main cross gate in right side, sprue, second cross gate and ingate section is 1: 1.9: 2.5: 1: 0.3.

preferably, overflow pieces are arranged at the positions where each group of cavities is not communicated with the ingate.

Preferably, the left end and the right end of the bayonet arranged on the second cross gate are symmetrically provided with the ingate, the left end and the right end of the bayonet at the right end of the main cross gate are symmetrically provided with the ingate, and the bayonet is connected to the middle part of the ingate.

Preferably, the ingate is disposed around the cavity, and the ingate has an arc shape.

Preferably, each group of cavities is matched with 4 groups of water inlet sheets to be matched and communicated with the ingate.

The utility model has the beneficial effects that: the utility model disperses the water inlet sheets, one surface is not concentrated, and the other surface is filled with water, each cavity adopts 4 water inlet sheets to distribute water, the water inlet is quick and uniform, the water cannot be concentrated, and the water is dispersed to reduce the difference of temperature fields during solidification shrinkage, thereby improving the quality of castings, and improving the bad inner cavity of the castings and the difference of temperature fields during solidification shrinkage caused by the impact of the concentrated water on sand molds; the size detection of the casting manufactured by the system confirms that the size deviation of the casting is kept between 0.4 and 0.6 mm; the finished product rate of the casting reaches 98 percent.

Drawings

FIG. 1 is a schematic structural diagram of a high-strength thick gray cast iron flywheel casting system according to the present invention;

in the figure: 1. a cup; 3. a main runner; 4. a second runner; 5. a bayonet; 6. an inner pouring channel; 7. a water entry sheet; 8. a cavity; 9. a filter disc; 10. and (4) an overflow sheet.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1, the present embodiment is a high-strength thick gray cast iron flywheel casting system, which includes a sprue cup 1, a sprue extending vertically from the bottom of the sprue cup, a main runner 3 extending horizontally and symmetrically from the bottom of the sprue to both sides, a second runner 4 extending vertically and upwardly and downwardly from the left end of the main runner, a bayonet 5 provided at the right end of the second runner and the main runner, a plurality of ingates 6 communicating with the bayonet, and a plurality of cavities 8 communicating with the ingates through a plurality of water inlet sheets 7.

The intermediate part at the main cross gate of both sides all is provided with cassette 9, and the income water flow proportion of the main cross gate in left side, the main cross gate in right side, sprue, second cross gate and ingate section is 1: 1.9: 2.5: 1: 0.3. the both sides of main horizontal runner all set up the cassette, can effectually filter the impurity that reduces the income water, play the buffering and keep away the effect of sediment to improve the pouring quality of foundry goods, the foundry goods inner chamber can not have and press from both sides sediment, gas pocket or crackle, and the sprue is direct to want the intercommunication with main horizontal runner, and the income water circulation is smooth and easy, can be full of the die cavity fast, raises the efficiency.

And overflow pieces 10 are arranged at the positions where each group of cavities is not communicated with the ingate. Each group of cavities of the left main cross pouring channel corresponds to one group of overflow pieces for placing excessive water and matching absorption; every group die cavity at the main runner on right side all corresponds and sets up two sets of overflow pieces, because main runner lug connection on right side is in the ingate, in order to prevent the overflow, consequently uses two sets of cooperations to absorb to cooperate the pouring through reducing into the water flow.

The left end and the right end of the bayonet of the second cross gate are symmetrically provided with one ingate, the left end and the right end of the bayonet of the right end of the main cross gate are symmetrically provided with one ingate, and the bayonet is connected to the middle part of the ingate.

The ingate is arranged around the cavity and is arc-shaped. The ingate is arranged around the cavity, so that the ingate can be matched with the water inlet sheet for use, the shape of the cavity is matched, and the water inlet is dispersed.

Every group die cavity all cooperate 4 group's income water slices cooperation with the ingate switch-on makes at least 70% position equipartition of die cavity put into the water slice, goes into water to the die cavity through the income water slice of difference, and it is fast, even, can not concentrate into water to go into water, disperses the difference of the temperature field when the income water reduces the solidification shrink to improve the quality of foundry goods. The hardness of the sand mould of the system is more than 85, and particularly, the hardness of the periphery of the template must be more than 80.

In the implementation case, in the casting process, the casting temperature is reduced, the casting control temperature 1380-1400, and the casting temperature of the tail mold can not be lower than 1340, so that the temperature field difference is reduced when the casting is solidified and shrunk, and the size of the casting is uniform.

The sand mold has the advantages that the water inlet sheets are dispersed, water is introduced into the sand mold without being concentrated, 4 water inlet sheets are adopted for each cavity to distribute water, the water is introduced quickly and uniformly, the water is not concentrated, the water is dispersed, and the difference of temperature fields during solidification and shrinkage is reduced, so that the quality of castings is improved, and the bad inner cavity of the castings and the difference of temperature fields during solidification and shrinkage caused by impact on the sand mold due to the concentrated water are improved; the size detection of the casting manufactured by the system confirms that the size deviation of the casting is kept between 0.4 and 0.6 mm; the finished product rate of the casting reaches 98 percent.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. The utility model provides a thick big grey cast iron flywheel the gating system of high strength which characterized in that: the sprue structure comprises a sprue cup, a sprue vertically extending from the bottom of the sprue cup, a main horizontal runner horizontally and symmetrically extending from the bottom of the sprue to two sides, a second horizontal runner vertically extending upwards and downwards from the left end of the main horizontal runner, a bayonet provided with the second horizontal runner and the right end of the main horizontal runner, a plurality of ingates communicated with the bayonet, and a plurality of cavities communicated with the ingates through a plurality of water inlet sheets.

2. The high-strength thick gray cast iron flywheel gating system according to claim 1, wherein: all be provided with the cassette in the intermediate part of the main horizontal runner in both sides, the income water flow proportion of the main horizontal runner in left side, the main horizontal runner in right side, sprue, second horizontal runner and ingate section is 1: 1.9: 2.5: 1: 0.3.

3. the high-strength thick gray cast iron flywheel gating system according to claim 1, wherein: and overflow pieces are arranged at the positions where each group of cavities is not communicated with the ingate.

4. The high-strength thick gray cast iron flywheel gating system according to claim 1, wherein: the left end and the right end of the bayonet of the second cross gate are symmetrically provided with one ingate, the left end and the right end of the bayonet of the right end of the main cross gate are symmetrically provided with one ingate, and the bayonet is connected to the middle part of the ingate.

5. The high-strength thick gray cast iron flywheel gating system according to claim 1, wherein: the ingate is arranged around the cavity and is arc-shaped.

6. The high-strength thick gray cast iron flywheel gating system according to claim 1, wherein: each group of cavities is matched with 4 groups of water inlet sheets to be communicated with the ingate.