阅读说明：本技术 一种基于蛇形流道的流动性测量装置及测量方法 (Mobility measuring device and method based on snake-shaped flow channel ) 是由 吕帅帅 汪兴兴 汪涛 王旭 倪红军 陈林飞 张福豹 张健 顾佳宇 夏文博 翟梦园 于 2020-06-23 设计创作，主要内容包括：本发明提供了一种基于蛇形流道的流动性测量装置及测量方法,包括：模具组件,至少一个,设置在机架上,每个所述模具组件包括上模板以及下模板,所述上模板设置在所述下模板上,所述下模板靠近所述上模板一面设置蛇形流道,所述上模板上设置流道口,所述流道口与所述蛇形流道的浇注入口相通；浇口杯,设置在所述上模板上,所述浇口杯通过所述流道口与所述浇注入口相通；以及加热装置,设置在所述机架上。本发明的一种基于蛇形流道的流动性测量装置及测量方法,将直流道改为蛇形流道,在模具组件尺寸不变的情况下增加了流道长度,所述上模板采用透明材料组成,便于测试过程中观察实验现象。(The invention provides a fluidity measuring device and a fluidity measuring method based on a snake-shaped flow channel, which comprises the following steps: the mold assemblies are arranged on the rack, each mold assembly comprises an upper template and a lower template, the upper template is arranged on the lower template, one surface of the lower template, which is close to the upper template, is provided with a snake-shaped runner, the upper template is provided with a runner port, and the runner port is communicated with a pouring inlet of the snake-shaped runner; the pouring cup is arranged on the upper template and communicated with the pouring inlet through the runner opening; and the heating device is arranged on the rack. According to the fluidity measuring device and the fluidity measuring method based on the snake-shaped flow channel, the direct flow channel is changed into the snake-shaped flow channel, the length of the flow channel is increased under the condition that the size of the die assembly is not changed, and the upper die plate is made of the transparent material, so that the experimental phenomenon can be observed conveniently in the testing process.)

1. A flow measurement device based on a serpentine flow channel, comprising:

the mold assemblies are arranged on the rack, each mold assembly comprises an upper template and a lower template, the upper template is arranged on the lower template, one surface of the lower template, which is close to the upper template, is provided with a snake-shaped runner, the upper template is provided with a runner port, and the runner port is communicated with a pouring inlet of the snake-shaped runner;

the pouring cup is arranged on the upper template and communicated with the pouring inlet through the runner opening; and

and the heating device is arranged on the rack.

2. The serpentine flow channel-based flow measurement device as claimed in claim 1, wherein the serpentine flow channel includes at least two straight flow channels and at least one semicircular flow channel, the two straight flow channels are connected by the semicircular flow channel, and the pouring inlet is connected to one end of one of the straight flow channels.

3. The serpentine flow channel-based fluidity measuring device according to claim 1, wherein the mold assembly further comprises a mold base, the lower mold plate abuts against a vertical limiting plate of the mold base, and the upper mold plate is positioned with the lower mold plate by a positioning pin arranged on the lower mold plate.

4. The serpentine flow channel-based flow measurement device of claim 1, wherein the upper plate is a transparent plate.

5. The serpentine flow channel based flow measurement device of claim 4, wherein the transparent material plate is one of a PC plate, a plexiglas plate, or a Permer plate.

6. A flow measurement method based on a snake-shaped flow channel is characterized by comprising the following steps:

s10 test preparation, namely detecting and cleaning the mobility measuring device based on the serpentine flow channel;

s20, configuring a material to be tested in a container, placing the container filled with the material to be tested in a heating device, and heating according to the test temperature condition to melt the material to be tested to obtain a molten material;

s30, pouring the melted material to be tested into a mould assembly through a pouring cup, and recording pouring result data, wherein the pouring result data comprises sample surface quality, sample filling length and flowing time; and

s40, when the die assembly is cooled to the room temperature, cleaning the material to be measured and resetting the fluidity measuring device based on the snake-shaped flow channel to finish the measurement of the material to be measured.

Technical Field

The invention relates to the technical field of investment casting teaching, in particular to a fluidity measuring device and a fluidity measuring method based on a snake-shaped flow channel.

Background

Casting is one of the basic processes of the modern basic machinery manufacturing industry. Fluidity is one of the casting properties of an alloy, and directly influences the mold filling capacity of the liquid alloy. The better the fluidity of the alloy, the stronger the mold filling capability, the more the casting with clear outline, thin wall and complex can be cast, and simultaneously the alloy is also beneficial to the floating and discharging of impurities and gas and the shrinkage and repair in the solidification process; and the alloy with poor fluidity is difficult to fill the die cavity, the die filling capability is poor, and the defects of insufficient casting, cold shut, air holes, slag inclusion and the like are easy to generate.

With the development of the technology, the investment casting technology develops and grows. Investment casting, also known as precision casting or lost wax casting, is a process in which a fusible material (such as wax) is used to make a precise fusible model, a plurality of layers of refractory coatings are applied to the model, the refractory coating is dried and hardened to form an integral shell, the lost wax is melted by heating the shell, the shell is baked at high temperature to form a refractory shell, liquid metal is poured into the refractory shell, and the casting is obtained after cooling. Investment casting has certain advantages over other casting methods. With the development of investment casting technology, the variety of the mould materials is increasingly diversified, and the compositions are different. The molding materials are generally divided into high-temperature, medium-temperature and low-temperature molding materials according to the melting point of the molding materials. The melting point of the low-temperature mould material is about 60 ℃, and the paraffin-stearic acid mixture is widely applied to China as the low-temperature mould material at present.

In the experimental practice teaching of various colleges and universities, some fluidity measurement teaching experiments are usually carried out in order to present the investment casting process to students, and the fluidity measurement teaching experiments are realized by a fluidity measurement teaching device. The flow channel of the prior fluidity measurement teaching device is a linear flow channel, and the flow channel is simple and the short flow channel length test phenomenon is not obvious.

Disclosure of Invention

In order to solve the problems, the invention provides a flow measurement device and a flow measurement method based on a snake-shaped flow channel.

In order to achieve the above purpose, the invention adopts a technical scheme that:

a serpentine flow channel based flow measurement device comprising: the mold assemblies are arranged on the rack, each mold assembly comprises an upper template and a lower template, the upper template is arranged on the lower template, one surface of the lower template, which is close to the upper template, is provided with a snake-shaped runner, the upper template is provided with a runner port, and the runner port is communicated with a pouring inlet of the snake-shaped runner; the pouring cup is arranged on the upper template and communicated with the pouring inlet through the runner opening; and the heating device is arranged on the rack.

Furthermore, the snake-shaped runner comprises at least two straight runners and at least one semicircular runner, the two straight runners are connected through the semicircular runner, and the pouring inlet is connected with one end of one straight runner.

Further, the die assembly further comprises a die base, the lower die plate is abutted to the vertical limiting plate of the die base, and the upper die plate is located with the lower die plate through a locating pin arranged on the lower die plate.

Further, the upper template is a transparent material plate.

Further, the transparent material plate is one of a PC plate, an organic glass plate, or a paml plate.

The invention also provides a fluidity measuring method based on the snake-shaped flow channel, which comprises the following steps: s10 test preparation, namely detecting and cleaning the mobility measuring device based on the serpentine flow channel; s20, configuring a material to be tested in a container, placing the container filled with the material to be tested in a heating device, and heating according to the test temperature condition to melt the material to be tested to obtain a molten material; s30, pouring the melted material to be tested into a mould assembly through a pouring cup, and recording pouring result data, wherein the pouring result data comprises sample surface quality, sample filling length and flowing time; and S40, when the die assembly is cooled to the room temperature, cleaning the material to be measured and resetting the fluidity measuring device based on the snake-shaped flow channel to finish the measurement of the material to be measured.

Compared with the prior art, the technical scheme of the invention has the following advantages:

according to the fluidity measuring device and the fluidity measuring method based on the snake-shaped flow channel, the direct flow channel is changed into the snake-shaped flow channel, the length of the flow channel is increased under the condition that the size of the die assembly is not changed, and the upper die plate is made of the transparent material, so that the experimental phenomenon can be observed conveniently in the testing process.

Drawings

The technical solution and the advantages of the present invention will be apparent from the following detailed description of the embodiments of the present invention with reference to the accompanying drawings.

FIG. 1 is a block diagram of a serpentine flow channel based flow measurement device according to an embodiment of the present invention;

FIG. 2 is a block diagram of a mold assembly according to one embodiment of the present invention;

FIG. 3 is a top plate block diagram according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view of the mold assembly and the pouring cup after they are connected according to one embodiment of the invention;

fig. 5 is a flow chart illustrating a flow measurement method based on a serpentine flow channel according to an embodiment of the present invention.

Reference numerals

The device comprises a frame 1, a storage table 11, a mould assembly 2, an upper mould plate 21, a runner port 211, a lower mould plate 22, a snake-shaped runner 221, a pouring inlet 222, a straight runner 223, a semicircular runner 224, a clamping device 23, a mould base 24, a 241 vertical limiting plate, a 25 positioning pin, a pouring cup 3, a heating device 4 and a container 41.

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.

The present embodiment provides a fluidity measuring device based on a serpentine flow channel, as shown in fig. 1, including: frame 1, mould assembly 2, pouring basin 3 and heating device 4. At least one of the die assemblies 2 is arranged on the rack 1, so that multiple groups of experiments can be carried out simultaneously, and the classroom experiment time is saved. The pouring cup 3 is arranged on the die assembly 2, and the heating device 4 is arranged on the frame 1. The frame 1 the mould subassembly 2 and pouring basin 3 all adopts stainless steel material or aluminum alloy material preparation, prevents that equipment from rustting, and the clearance is difficult.

The rack 1 comprises a storage table 11, wherein the storage table 11 is used for containing test materials and auxiliary appliances such as a cleaning shovel. The die assembly 2, the pouring cup 3 and the heating device 4 are all arranged on the rack 1, and the height design of the rack 1 refers to human engineering, so that the experimental operation is easy.

As shown in fig. 2 to 4, the mold assembly 2 includes an upper mold plate 21 and a lower mold plate 22, the upper mold plate 21 is disposed on the lower mold plate 22, the upper mold plate 21 is a transparent material plate, and the transparent material plate is one of a PC plate, an organic glass plate, or a paml plate. The transparent material plate is used as the upper template 21, so that the flowing and forming processes of the low-temperature die material in the runner of the lower template 22 in the pouring process are visualized, and the experimental phenomenon is easy to observe. Meanwhile, the visual upper template 21 is combined, so that the surface appearance and the quality of the sample obtained under different pouring conditions can be visually observed.

The die assembly 2 further comprises a die base 24, the lower die plate 22 abuts against a vertical limiting plate of the die base 24, and the upper die plate 21 is located on the lower die plate 22 through a locating pin 25 arranged on the lower die plate 22. The upper template 21 is pressed against the lower template 22 by an "L" shaped clamping device 23 arranged on the frame 1.

A serpentine runner 221 is arranged on one side of the lower template 22 close to the upper template 21, a runner port 211 is arranged on the upper template 21, and the runner port 211 is communicated with a pouring inlet 222 of the serpentine runner 221. The serpentine runner 221 includes at least two straight runners 223 and at least one semicircular runner 224, the two straight runners 223 are connected through the semicircular runner 224, and the pouring inlet 222 is connected to one end of one straight runner 223. In the design of the straight flow channel 223 and the semicircular flow channel 224, the lengths of the straight flow channel 223 and the semicircular flow channel 224 are generally designed to be fixed integer values so as to facilitate the measurement and reading of experimental data.

The pouring cup 3 communicates with the pouring inlet 222 through the runner port 211. The bottom of the pouring cup 3 is a conical pipe, the runner port 211 is a conical hole, the inner wall of the conical hole is matched with the outer wall of the conical pipe, the conical pipe is accommodated in the conical hole, the pouring cup 3 is tightly pressed with the upper template 21 under the action of self gravity, and leakage of wax materials in the pouring process is avoided.

The invention also provides a fluidity measuring method based on the snake-shaped flow channel, which comprises the following steps: and S10, preparing a test, and detecting and cleaning the mobility measuring device based on the serpentine flow channel. S20, a material to be measured is configured in a container, the container filled with the material to be measured is placed in a heating device, and the material to be measured is melted to obtain a molten material by heating according to the test temperature condition. S30, pouring the melted material to be tested into the mould assembly through the pouring cup, and recording pouring result data, wherein the pouring result data comprises the surface quality of the sample, the filling length of the sample and the flowing time. And S40, when the die assembly is cooled to the room temperature, cleaning the material to be measured and resetting the fluidity measuring device based on the snake-shaped flow channel to finish the measurement of the material to be measured.

Two groups of wax formulas of a wax formula A and a wax formula B are used as materials to be measured, and three groups of temperature experiments are simultaneously carried out on each group of wax formula, so that the fluidity measurement method based on the serpentine flow channel is explained and comprises the following steps:

s10 test preparation, wherein the method comprises the steps of checking floating dust and impurities on the surfaces of a snake-shaped flow channel-based fluidity measuring device and a cleaning flow channel, and arranging three mold assemblies 2 on the snake-shaped flow channel-based fluidity measuring device, wherein the mold assemblies 2 are respectively numbered 1#, 2#, and 3 #.

S20 preparing a wax formula A, placing three beakers filled with the wax formula A in a heating device 4, wherein the three beakers are numbered 1 ' #, 2 ' #and3 ' #respectively, and the heating temperatures are respectively as follows: heating the wax material formula A in the three beakers to melt at 65 ℃, 75 ℃ and 85 ℃ to obtain a molten material.

S30, the molten material of the 1 ' # beaker is poured into the 1# mold assembly 2, the molten material of the 2 ' # beaker is poured into the 2# mold assembly 2, and the molten material of the 3 ' # beaker is poured into the 3# mold assembly 2. And respectively recording pouring result data, observing the surface quality of the samples obtained under different pouring conditions, and recording the filling lengths of the pouring samples obtained under different pouring conditions.

S40, cleaning the wax material, and after the mould assembly is cooled to room temperature, cleaning the wax material on the mould assembly 2 and the experiment table to prepare for the next experiment.

Repeating the step S20, preparing a wax material formula B, placing three beakers filled with the wax material formula B in a heating device 4, wherein the numbers of the three beakers are respectively 1 ' #, 2 ' #and3 ' #, and the heating temperatures are respectively as follows: heating the wax material formula B in the three beakers to be molten at 65 ℃, 75 ℃ and 85 ℃ to obtain a molten material.

Repeating the step of S30, pouring the melted material of the melted 1 ' # beaker into the 1# mold assembly 2, pouring the melted material of the melted 2 ' # beaker into the 2# mold assembly 2, and pouring the melted material of the melted 3 ' # beaker into the 3# mold assembly 2. And respectively recording pouring result data, observing the surface quality of the samples obtained under different pouring conditions, and recording the filling lengths of the pouring samples obtained under different pouring conditions.

And repeating the step S40, cleaning the wax material on the mold component 2 and the experiment table after the mold component 2 is cooled to the room temperature, resetting the mobility measuring device based on the serpentine flow channel, and completing the mobility measurement of the wax material formula A and the wax material formula B.

The wax material formula is injected from the upper end of the pouring cup 3, flows into the pouring inlet 222 through the pouring cup 3, sequentially flows forwards along the snake-shaped flow channel 221, the molten material flows and fills in the flow channel of the die assembly 2, the flowing process of the molten material can be directly observed through the transparent plate, the molten material is cooled after the cooling time of the molten material is reached, and finally the quality of the fluidity of the molten material is represented by the length of the filled type after the molten material is cooled. And meanwhile, the visual transparent plate is combined, so that the surface appearance and quality of the sample obtained under different pouring conditions can be visually observed. The flow re-length at three temperatures for the different wax formulations is shown in Table 1 below

It can be seen from table 1 that the higher the temperature, the longer the flow length, the different wax formulations also have different flow lengths at the same temperature.

Table 1.

The above description is only an exemplary embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes that are transformed by the content of the present specification and the attached drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.