CN218015632U

CN218015632U - Casting system of composite disc friction ring

Info

Publication number: CN218015632U
Application number: CN202222478107.XU
Authority: CN
Inventors: 贺关水; 岳殿亮; 刘广胜
Original assignee: Yantai Winhere Auto Part Manufacturing Co ltd
Current assignee: Yantai Winhere Auto Part Manufacturing Co ltd
Priority date: 2022-09-19
Filing date: 2022-09-19
Publication date: 2022-12-13
Anticipated expiration: 2032-09-19

Abstract

The utility model relates to a gating system of composite disc friction ring, including psammitolite, vertical watering and annular runner, be equipped with first interface channel on the psammitolite, first interface channel is located the center of waiting to form the work piece, the annular runner is watered and is watered with last annular including the lower annular of intercommunication, first interface channel's upper end with vertical watering intercommunication, the lower extreme with the intercommunication is watered to lower annular, lower annular is watered through lower ingate and lower die cavity intercommunication, the die cavity is used for forming down the braking face down, go up annular runner through last ingate and last die cavity intercommunication, it is used for forming the braking face to go up the die cavity. Through watering the intercommunication with annular down with last annular, realize going up the braking face and pouring simultaneously with braking face down, guarantee that the temperature distribution of hot water is even in the upper and lower braking face in the pouring process, the solidification process is even to guarantee that the micro structure of pouring formation is even, effectively reduced the risk that the braking face produced thermal fatigue crack.

Description

Casting system of composite disc friction ring

Technical Field

The utility model relates to a casting technical field, concretely relates to gating system of compound dish friction ring.

Background

Kinetic energy is converted into heat energy through a brake disc in the braking process of the automobile, and the heat energy is mainly transferred to the brake disc, so that the automobile is stopped. The brake disc belongs to a safety piece and is concerned with the driving safety of the automobile. During the braking process of the automobile, the brake disc can reach high temperature, thermal fatigue cracks are easily formed on the braking surface along with the increase of the service time of the automobile, the braking efficiency is reduced or the braking is failed. Composite disc friction rings are often used on high performance vehicles with a higher risk of crack failure.

The crack failure risk of the brake disc is closely related to a pouring system in the casting process of the brake disc, namely the pouring and filling process of the composite disc friction ring casting has an important influence on the thermal fatigue performance of the composite disc friction ring casting. The existing composite disc friction ring pouring system mainly comprises a sprue, a cross gate, a filter screen and an ingate. The sprue is located one side of waiting to pour into a mould the work piece, and molten iron passes through the sprue and gets into the cross gate, and after the filter screen filtration, molten iron gets into the foundry goods along the big excircle of the lower braking surface of friction ring foundry goods from three ingates, then reaches the braking surface through the rib, finally is full of whole foundry goods completely.

Because the ingate enters molten iron from the maximum excircle of the friction ring, the path and time for filling the friction ring of the composite disc by the molten iron are long, the temperature is reduced quickly, the temperature of the molten iron in the area of the friction ring close to the ingate is high, the temperature of the molten iron in the area far away from the ingate is low, so that the temperature of the molten iron in the circumferential direction is not uniformly distributed, the microstructure generated in the solidification process is not uniform, and then the molten iron is heated in the braking process to generate expansion or shrink generated in the cooling process to be inconsistent, and the risk of generating thermal fatigue cracks is high. In addition, as molten iron enters the casting from the lower braking surface only through the ingate and then fills the upper braking surface through the ribs, the temperature difference of the molten iron on the upper braking surface and the lower braking surface is large, so that the microstructure difference in the solidification process is large.

SUMMERY OF THE UTILITY MODEL

The utility model discloses casting process easily causes the subassembly microstructure inhomogeneous among the prior art, leads to the problem that thermal fatigue resistance ability is low, provides a gating system of compound dish friction ring.

The utility model provides an above-mentioned technical problem's technical scheme as follows: the utility model provides a gating system of composite disc friction ring, includes psammitolite, vertical runner and annular runner, be equipped with first connecting channel on the psammitolite, first connecting channel is located the center of treating the shaping work piece, the annular runner is including the lower annular runner and the last annular runner of intercommunication, the upper end of first connecting channel with vertical runner intercommunication, the lower extreme with lower annular runner intercommunication, lower annular runner is through interior runner and lower die cavity intercommunication down, the die cavity is used for forming braking surface down, go up annular runner through last interior runner and last die cavity intercommunication, it is used for forming braking surface to go up the die cavity.

On the basis of the technical scheme, the utility model discloses a reach the convenience of use and the stability of equipment, can also make following improvement to foretell technical scheme:

furthermore, the device also comprises a plurality of second connecting channels, wherein the second connecting channels are uniformly arranged along the circumferential direction of the first connecting channel, one end of each second connecting channel is communicated with the upper annular pouring channel, and the other end of each second connecting channel is communicated with the lower annular pouring channel.

Furthermore, go up the die cavity with be equipped with the rib chamber that a plurality of circumference rotation set up on the die cavity down, it is a plurality of the rib chamber is extended to all around by the center, the rib chamber is used for forming the rib on treating the shaping work piece.

Furthermore, the upper ingate and the lower ingate are provided with a plurality of ingates, and the rotating directions of the upper ingate and the lower ingate are the same as the rotating direction of the rib cavity.

Further, the upper ingate and the lower ingate are positioned on the minimum inner circle of the workpiece to be formed.

Further, the upper ingate and the lower ingate are arranged in a staggered manner with the second connecting channel.

Further, still include the dashpot, the dashpot is located the lower extreme of first connecting channel, first connecting channel pass through the dashpot with lower annular is watered and is communicate.

Further, the buffer slot is the notch cuttype that the lower extreme is little and the upper end is big.

Further, the casting device also comprises a casting ceramic filter screen, wherein the casting ceramic filter screen is positioned between the vertical pouring channel and the first connecting channel.

The beneficial effects of the utility model are that: the first connecting channel is arranged at the center of the workpiece to be formed, so that molten iron is uniformly dispersed into the upper and lower annular pouring channels from the center, the pouring path is short, and the temperature loss of the molten iron is small; through watering the intercommunication with annular down with last annular, realize going up the braking face and pouring simultaneously with braking face down, guarantee that the pouring in-process upper and lower braking face in the molten iron temperature distribute evenly, the solidification process is even to guarantee that the microstructure that the pouring formed is even, make each position of braking face inflation or shrink unanimous, thermal stress is little, and the heat strength improves greatly, has effectively reduced the risk that the braking face produced thermal fatigue crackle.

Drawings

FIG. 1 is a top view of the inventive gating system;

FIG. 2 is a cross-sectional view taken along line B-B of FIG. 1 in accordance with the present invention;

fig. 3 is a schematic view of the casting molding of the present invention.

The reference numbers are recorded as follows: 1. an upper braking surface; 2. a lower braking surface; 3. a sand core; 4. a vertical pouring channel; 5. casting a ceramic filter screen; 6. a first connecting passage; 7. a lower annular runner; 8. a lower inner pouring gate; 9. a second connecting channel; 10. an upper annular runner; 11. an inner pouring channel is arranged; 12. an upper cavity; 13. a lower cavity; 14. a buffer tank; 15. a rib cavity; 16. and (4) ribs.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", 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 to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

The principles and features of the present invention will be described with reference to the drawings, which are provided for illustration only and are not intended to limit the scope of the invention.

As shown in fig. 1 and 3, the utility model discloses a gating system of composite disc friction ring, it includes psammitolite 3, vertical runner 4 and annular runner, be equipped with first connecting channel 6 on the psammitolite 3, first connecting channel 6 is located the center of treating the shaping work piece and treats the center of shaping composite disc friction ring promptly, the annular runner is including the lower annular runner 7 and the last annular runner 10 of intercommunication, the upper end of first connecting channel 6 with vertical runner 4 intercommunication, the lower extreme with lower annular runner 7 intercommunication, lower annular runner 7 is through lower ingate 8 and lower die cavity 13 intercommunication, die cavity 13 is used for forming braking face 2 down, go up annular runner 10 through ingate 11 and last die cavity 12 intercommunication, it is used for forming braking face 1 to go up die cavity 12. By arranging the upper annular pouring channel 10 and the lower annular pouring channel, molten iron flows uniformly from the center to the periphery, so that the uniform temperature distribution and the uniform solidification in the pouring process are ensured, the microstructures of the upper braking surface 1 and the lower braking surface 2 are uniform, and the risk of thermal fatigue cracks generated on the braking surfaces is reduced; molten iron firstly flows into the lower annular pouring gate 7 and then upwards flows into the upper annular pouring gate 10, so that the smoothness of the molten iron flow is ensured, bubbles are prevented from being generated, casting defects are avoided, and the qualification rate of products is improved; through watering 10 with annular down and watering 7 intercommunication on will going up, realize pouring simultaneously and go up braking face 1 and braking face 2 down, further guarantee that 2 molten iron temperature distributions of braking face are even about the upper and lower, improve the life of composite disc friction ring, improve the security of using.

Specifically, the vertical pouring gate 4 is in a horn shape with a large upper end and a small lower end, so that molten iron is poured into the vertical pouring gate 4 conveniently, and the convenience of operation is improved.

The gating system further comprises a casting ceramic filter screen 5, wherein the casting ceramic filter screen 5 is positioned between the vertical pouring gate 4 and the first connecting channel 6. The impurities in the molten iron are filtered through the ceramic filter screen 5 for casting, so that the casting defect is avoided, and the service life of the braking surface is prolonged.

The ceramic filter screen 5 for casting has a three-dimensional net structure, can effectively filter metal melt, is high-temperature resistant and has high molten iron impact resistance.

The gating system further comprises a plurality of second connecting channels 9, the second connecting channels 9 are evenly arranged along the circumferential direction of the first connecting channel 6, one end of each second connecting channel 9 is communicated with the upper annular pouring gate 10, and the other end of each second connecting channel 9 is communicated with the lower annular pouring gate 7. Through setting up a plurality of second connecting channel 9, make the molten iron from lower annular runner 7 even flow to last annular runner 10 in, guarantee that the molten iron temperature distribution is even.

In this embodiment, four second connecting passages 9 are provided, and four second connecting passages 9 penetrate through the sand core 3 and are uniformly arranged along the circumferential direction, so that the molten iron flows from the lower ring-shaped pouring gate 7 to the upper ring-shaped pouring gate 10 uniformly.

Optionally, the number of the second connecting channels 9 can be increased according to the size of the friction ring, so that the pouring efficiency of the friction ring is ensured, molten iron is ensured to be poured uniformly, and thermal fatigue cracks generated on the braking surface of the friction ring are reduced.

Go up die cavity 12 with be equipped with a plurality of rib chamber 15 that circumference rotation set up on the die cavity 13 down, it is a plurality of rib chamber 15 extends to all around by the center, rib chamber 15 is used for connecting upper die cavity 12 and lower die cavity 13. The rib cavities 15 are arranged to form the connecting ribs 16 with the rotating direction on the workpiece, so that the structural strength of the workpiece is improved, the heat dissipation effect is improved, and the service life of the workpiece is prolonged. Through setting up the rib chamber 15 to the structure of circumference rotation to form circumference rotation's rib 16, when the vehicle travel, make the air current pass through rib 16 and dispel the heat to the work piece, improve the radiating effect to the work piece.

The number of the upper ingate 11 and the number of the lower ingate 8 are both multiple, and the rotating directions of the upper ingate 11 and the lower ingate 8 are the same as the rotating direction of the rib cavity 15. The molten iron is ensured to be uniformly filled in the workpiece to be formed, and the defects of bubble generation and the like are avoided.

In this embodiment, the upper ingate 11 and the lower ingate 8 are four, the four upper ingates 11 are communicated with the upper annular runner 10, and the four lower ingates 8 are communicated with the lower annular runner 7, so that the upper braking surface 1 and the lower braking surface 2 are simultaneously poured, uniform microstructure is ensured to be uniformly distributed in molten iron temperature, and the performance of resisting thermal fatigue cracks is improved.

The upper ingate 11 and the lower ingate 8 are positioned on the minimum inner circle of the workpiece to be formed. Molten iron is uniformly dispersed into the upper die cavity 12 and the lower die cavity 13 from the minimum inner circle to the outside, the path through which a workpiece is filled is small, the temperature loss of the molten iron is small, and the solidification process is uniform, so that the workpiece with uniform microstructure is obtained, and the service life of the workpiece is prolonged.

The gating system further comprises a buffer groove 14, wherein the buffer groove 14 is positioned at the lower end of the first connecting channel 6, and the first connecting channel 6 is communicated with the lower annular pouring channel 7 through the buffer groove 14. Through setting up dashpot 14 at the lower extreme of first connecting channel 6, cushion the molten iron that flows into the annular and water, make gentle the flowing to the annular down water 7 of watering of flowing, avoid producing the bubble defect, guarantee simultaneously that there is sufficient quantity of molten iron to flow into in die cavity 12 and the lower die cavity 13, guarantee the shaping effect of work piece, avoid appearing because of the not enough casting defect that produces of molten iron.

In this embodiment, the buffer tank 14 has a stepped shape with a smaller lower end and a larger upper end. The molten iron is ensured to smoothly flow into the lower annular pouring gate 7, and the defects of bubble generation and the like are avoided.

The utility model discloses a pouring process as follows:

molten iron firstly passes through the vertical pouring gate 4, is filtered by the ceramic filter screen 5 for casting, and then reaches the lower annular pouring gate 7 through the first connecting channel 6, and because the lower annular pouring gate 7 is communicated with the upper annular pouring gate 10, the molten iron flows into the upper annular pouring gate 10 through the lower annular pouring gate 7, fills the upper cavity 12 through the upper pouring gate 11 to form the upper braking surface 1, and fills the lower cavity 13 through the lower pouring gate 8 to form the lower braking surface 2. Because the upper cavity 12 and the lower cavity 13 are poured simultaneously, the temperature distribution of molten iron is uniform, the solidification processes of the two braking surfaces are uniform, microstructures generated in the solidification processes are uniform, and further the amount of expansion generated by heating in the braking process or the amount of contraction generated in the cooling process are consistent, the risk of generating thermal fatigue cracks is reduced, and the service life is prolonged.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The utility model provides a gating system of composite disc friction ring, characterized in that, includes psammitolite (3), vertical runner (4) and annular runner, be equipped with first connecting channel (6) on psammitolite (3), first connecting channel (6) are located the center of treating the shaping work piece, the annular runner is including lower annular runner (7) and last annular runner (10) of intercommunication, the upper end of first connecting channel (6) with vertical runner (4) intercommunication, the lower extreme with lower annular runner (7) intercommunication, lower annular runner (7) are through ingate (8) and lower die cavity (13) intercommunication down, die cavity (13) are used for forming braking face (2) down, go up annular runner (10) through ingate (11) and last die cavity (12) intercommunication, it is used for forming braking face (1) to go up die cavity (12).

2. The gating system according to claim 1, further comprising a plurality of second connecting channels (9), wherein the plurality of second connecting channels (9) are uniformly arranged along the circumference of the first connecting channel (6), one end of each second connecting channel (9) is communicated with the upper annular pouring channel (10), and the other end of each second connecting channel is communicated with the lower annular pouring channel (7).

3. The gating system according to claim 1 or 2, wherein a plurality of rib cavities (15) which are arranged in a circumferential rotating manner are arranged on the upper cavity (12) and the lower cavity (13), the plurality of rib cavities (15) extend from the center to the periphery, and the rib cavities (15) are used for forming ribs (16) on a workpiece to be formed.

4. A gating system according to claim 3, wherein the upper ingate (11) and the lower ingate (8) are provided in plurality, and the upper ingate (11) and the lower ingate (8) rotate in the same direction as the direction of rotation of the bar cavity (15).

5. The gating system according to claim 4, wherein the upper ingate (11) and the lower ingate (8) are located on the smallest inner circle of the workpiece to be shaped.

6. The gating system according to claim 5, wherein the upper ingate (11) and the lower ingate (8) are arranged staggered with respect to the second connecting channel (9).

7. The gating system according to claim 1, further comprising a buffer trough (14), the buffer trough (14) being located at a lower end of the first connecting channel (6), the first connecting channel (6) being in communication with the lower annular runner (7) through the buffer trough (14).

8. The gating system of claim 7, wherein the buffer reservoir (14) is stepped with a smaller lower end and a larger upper end.

9. The gating system according to claim 1, further comprising a casting ceramic filter screen (5), the casting ceramic filter screen (5) being located between the vertical runner (4) and the first connecting channel (6).