阅读说明：本技术 标准恒流孔的孔径和圆柱度的测量方法 (Method for measuring aperture and cylindricity of standard constant-current hole ) 是由 程东旭 李浩亮 席高磊 王娟娟 许淑红 李倩 李红枝 艾丹 张小娜 高桂圆 于 2019-08-06 设计创作，主要内容包括：本发明公开了一种标准恒流孔的孔径和圆柱度的测量方法,其包括：清洗标准恒流孔；混合脱模材料以得到混合液；在标准恒流孔中构建油膜；将混合液注入构建有油膜的标准恒流孔中；使混合液固化,以得到固化模型；对固化模型进行脱模；测量固化模型的第一直径；测量油膜厚度；根据第一直径和油膜厚度获得标准恒流孔的孔径；对固化模型进行圆柱度检测。本发明提供的标准恒流孔的孔径和圆柱度的测量方法,通过在恒流孔中成型一种固化模型,通过对固化模型的测量来实现对恒流孔的孔径及圆柱度的检测,从而可以在不破坏零件的前提下实现对恒流孔的孔径的检测,同时实现了对圆柱度的检测。(The invention discloses a method for measuring the aperture and cylindricity of a standard constant-current hole, which comprises the following steps: cleaning a standard constant flow hole; mixing the demoulding materials to obtain a mixed solution; constructing an oil film in a standard constant flow hole; injecting the mixed solution into a standard constant flow hole with an oil film; solidifying the mixed solution to obtain a solidified model; demolding the curing model; measuring a first diameter of the solidification model; measuring the thickness of the oil film; obtaining the aperture of a standard constant flow hole according to the first diameter and the oil film thickness; and (5) detecting the cylindricity of the solidified model. According to the method for measuring the aperture and the cylindricity of the standard constant-current hole, the curing model is formed in the constant-current hole, and the aperture and the cylindricity of the constant-current hole are detected by measuring the curing model, so that the aperture of the constant-current hole can be detected on the premise of not damaging parts, and the cylindricity is detected at the same time.)

1. A method for measuring the aperture and cylindricity of a standard constant-current hole is characterized by comprising the following steps:

Cleaning a standard constant flow hole;

mixing the demoulding materials to obtain a mixed solution;

building an oil film in the standard constant flow orifice;

Injecting the mixed liquor into the standard constant flow hole with an oil film established;

solidifying the mixed solution to obtain a solidified model;

Demolding the curing model;

Measuring a first diameter of the solidification model;

Measuring the thickness of the oil film;

obtaining the aperture of the standard constant flow hole according to the first diameter and the oil film thickness;

And detecting the cylindricity of the curing model.

2. The method for measuring the aperture and the cylindricity of the standard constant-current hole according to claim 1, wherein the measuring of the oil film thickness specifically comprises:

measuring a second diameter of the circumference where the outer surface of the standard constant-current hole is located;

Constructing an oil film on the outer surface of the standard constant-current hole;

measuring a third diameter of the outer surface of the standard constant-current hole after an oil film is constructed;

And obtaining the oil film thickness according to the second diameter and the third diameter.

3. The method of measuring the pore size and cylindricity of a standard constant flow orifice of claim 1 wherein the release material comprises a liquid vinyl polysiloxane and a liquid hardener.

4. The method of claim 1, wherein the oil film is dimethicone.

5. The method of measuring the pore size and cylindricity of a standard constant flow orifice of claim 1, wherein prior to solidifying the mixed liquor to obtain a solidified model, the method further comprises:

and applying pressure to the mixed liquid in the standard constant-current hole.

6. The method of measuring the pore size and cylindricity of a standard constant flow orifice of claim 1, wherein after solidifying the mixed liquid to obtain a solidified model, the method further comprises:

And heating the standard constant-current hole within a preset temperature range.

7. the method of claim 6, wherein the predetermined temperature range is 80-100 ℃.

8. The method for measuring the aperture and the cylindricity of the standard constant-current hole according to claim 1, wherein the solidifying the mixed liquid to obtain a solidified model specifically comprises:

and standing the standard constant-current hole for a set time to enable the mixed liquid to form a curing model after curing.

9. the method of measuring the aperture and cylindricity of a standard constant flow orifice of claim 1, wherein after purging the standard constant flow orifice, the method further comprises:

And carrying out temperature and humidity balance on the standard constant-current hole in a detection environment.

10. the method for measuring the aperture and the cylindricity of the standard constant-current hole according to claim 1, wherein the cylindricity detection of the solidification model specifically comprises:

And detecting the cylindricity of the curing model by adopting three coordinates.

Technical Field

The invention relates to the technical field of cigarettes, in particular to a method for measuring the aperture and cylindricity of a standard constant-flow hole.

Background

the special standard constant flow hole for tobacco, commonly called as sonic nozzle, is used as standard apparatus for various special tobacco detecting instruments such as a resistance-smoking tester, a ventilation rate tester, a smoking machine drawing curve tester and the like, and has the main function of keeping the gas flow constant to the flow meeting the measuring requirement. Research shows that the pore-forming quality of the constant-flow hole special for tobacco has great influence on the flow and the quality of the output gas,

however, the aperture is smaller than 1mm, the depth is larger than 1mm, and part of the constant-flow hole nozzle is ruby, so the shape in the hole cannot be effectively monitored by the conventional image method. For the micropore, the inner contour of the micropore is measured, the micropore can be cut along a cross section passing through an axis, and the section is directly measured. The methods such as micro probe and white light interference can realize the measurement of the inner contour of the micro hole without damage, but the methods are relatively complex to realize and are not completely applicable. In addition, the existing methods cannot realize the detection of the cylindricity of the standard constant-current hole.

Disclosure of Invention

The invention aims to provide a method for measuring the aperture and the cylindricity of a standard constant-current hole, which aims to solve the problems in the prior art and realize the detection of the aperture and the cylindricity of the standard constant-current hole under the condition of not damaging parts.

the invention provides a method for measuring the aperture and cylindricity of a standard constant-current hole, which comprises the following steps:

Cleaning a standard constant flow hole;

Mixing the demoulding materials to obtain a mixed solution;

Building an oil film in the standard constant flow orifice;

injecting the mixed liquor into the standard constant flow hole with an oil film established;

solidifying the mixed solution to obtain a solidified model;

Demolding the curing model;

measuring a first diameter of the solidification model;

measuring the thickness of the oil film;

Obtaining the aperture of the standard constant flow hole according to the first diameter and the oil film thickness;

and detecting the cylindricity of the curing model.

The method for measuring the aperture and the cylindricity of the standard constant-current hole, wherein preferably, the measuring the oil film thickness specifically comprises the following steps:

Measuring a second diameter of the circumference where the outer surface of the standard constant-current hole is located;

Constructing an oil film on the outer surface of the standard constant-current hole;

measuring a third diameter of the outer surface of the standard constant-current hole after an oil film is constructed;

And obtaining the oil film thickness according to the second diameter and the third diameter.

The method for measuring the pore size and cylindricity of a standard constant-current orifice as described above, wherein preferably the release material comprises a liquid vinyl polysiloxane and a liquid hardener.

The method for measuring the pore diameter and the cylindricity of the standard constant-current hole as described above, wherein preferably the oil film is dimethicone.

The method for measuring the pore diameter and the cylindricity of the standard constant-current hole as described above, wherein preferably, before solidifying the mixed liquid to obtain a solidified model, the method further comprises:

and applying pressure to the mixed liquid in the standard constant-current hole.

The method for measuring the pore diameter and the cylindricity of the standard constant-current orifice as described above, wherein preferably, after solidifying the mixed liquid to obtain a solidification model, the method further comprises:

and heating the standard constant-current hole within a preset temperature range.

the method for measuring the aperture diameter and the cylindricity of the standard constant-current hole as described above, wherein the preset temperature range is preferably 80 to 100 ℃.

The method for measuring the aperture and the cylindricity of the standard constant-current hole, wherein preferably, the solidifying the mixed liquid to obtain a solidified model, specifically comprises:

and standing the standard constant-current hole for a set time to enable the mixed liquid to form a curing model after curing.

the method for measuring the aperture and the cylindricity of the standard constant-current hole as described above, wherein preferably, after the standard constant-current hole is cleaned, the method further comprises:

and carrying out temperature and humidity balance on the standard constant-current hole in a detection environment.

The method for measuring the aperture and the cylindricity of the standard constant-current hole preferably includes:

And detecting the cylindricity of the curing model by adopting three coordinates.

according to the method for measuring the aperture and the cylindricity of the standard constant-current hole, the curing model is formed in the constant-current hole, and the aperture and the cylindricity of the constant-current hole are detected by measuring the curing model, so that the aperture of the constant-current hole can be detected on the premise of not damaging parts, and the cylindricity is detected at the same time.

drawings

the following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Fig. 1 is a flowchart of a method for measuring the aperture and cylindricity of a standard constant-current orifice according to an embodiment of the present invention.

Detailed Description

reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.

as shown in fig. 1, an embodiment of the present invention provides a method for measuring the aperture and cylindricity of a standard constant flow hole, which includes the following steps:

And step S1, cleaning the standard constant-current hole.

And step S2, mixing the demolding materials to obtain a mixed solution.

And step S3, constructing an oil film in the standard constant-current hole.

the oil film can prevent the mixed liquid from directly contacting the inner wall of the constant-current hole, so that the mixed liquid is attached to the inner wall of the constant-current hole when being solidified and is difficult to demould. In particular, the oil film may be dimethicone.

And step S4, injecting the mixed liquid into a standard constant flow hole with an oil film.

and step S5, solidifying the mixed solution to obtain a solidified model.

And step S6, demolding the solidified model.

After the curing model is demoulded, the surface of the curing model and the inner surface of the constant flow hole can be slightly wiped to remove oil films attached to the outer wall of the curing model and in the constant flow hole so as to ensure the accuracy of measuring the diameter size of the curing model.

Step S7, measuring a first diameter of the cured model.

and step S8, measuring the oil film thickness.

And step S9, obtaining the aperture of the standard constant flow hole according to the first diameter and the oil film thickness.

after the mixed liquid is solidified in the constant flow hole to form a solidification model, the constant flow hole is filled by the solidification model and the oil film together, so that the diameter of the solidification model and the thickness of the oil film are added to obtain the aperture of the constant flow hole.

and step S10, cylindricity detection is carried out on the curing model. Wherein, the cylindricity detection can be carried out on the curing model by adopting three coordinates.

when the cylindricity of the curing model is detected, although the diameter of the curing model is smaller than the aperture of the standard constant-current hole, the cylindricity is not affected by the presence or absence of an oil film, so that the cylindricity of the standard constant-current hole can be reflected by detecting the cylindricity of the curing model.

according to the method for measuring the aperture and the cylindricity of the standard constant-current hole, provided by the embodiment of the invention, the curing model can be formed in the constant-current hole, and the aperture and the cylindricity of the constant-current hole can be detected by measuring the curing model, so that the aperture of the constant-current hole can be detected on the premise of not damaging parts, and the cylindricity can be detected at the same time.

Further, step S8 specifically includes:

and step S81, measuring a second diameter of the circumference of the outer surface of the standard constant flow hole.

And step S82, constructing an oil film on the outer surface of the standard constant-current hole.

And step S83, measuring the third diameter of the outer surface of the standard constant flow hole after the oil film is constructed.

And step S84, obtaining the oil film thickness according to the second diameter and the third diameter.

And subtracting the third diameter from the second diameter to obtain the total thickness of the oil film attached to the outer surface of the standard constant current hole, wherein the total thickness of the oil film can be considered to be consistent with the total thickness of the oil film attached to the inner wall of the standard constant current hole. Thus, the first diameter of the solidified model is added to the total thickness of the oil film to obtain the aperture size of the standard constant-current hole.

The demolding material comprises liquid vinyl polysiloxane and a liquid hardening agent, and the mixed liquid of the liquid vinyl polysiloxane and the liquid hardening agent can be solidified in a short time through mixing of the liquid vinyl polysiloxane and the liquid hardening agent, wherein in the embodiment, the solidification time is 10-15 min.

further, before step S5, the method further includes:

Pressure is applied to the mixed liquid in the standard constant-current hole, so that the mixed liquid can be filled in the standard constant-current hole, and air bubbles in the mixed liquid are eliminated.

further, after step S5, the method further includes:

and heating the standard constant-current hole within a preset temperature range so as to facilitate the demoulding of the curing mould from the standard constant-current hole.

The preset temperature range may be 80-100 ℃, and in this embodiment, is preferably 90 ℃.

further, step S5 specifically includes:

And standing the standard constant-current hole for a set time to solidify the mixed liquid to form a solidified model. The set time may be 10min to 15 min.

further, after step S1, the method further includes:

And carrying out temperature and humidity balance on the standard constant-current hole in the detection environment so as to eliminate the influence of environmental factors on the measurement data.

According to the method for measuring the aperture and the cylindricity of the standard constant-current hole, provided by the embodiment of the invention, the curing model is formed in the constant-current hole, and the aperture and the cylindricity of the constant-current hole are detected by measuring the curing model, so that the aperture of the constant-current hole can be detected on the premise of not damaging parts, and the cylindricity is detected at the same time.

The construction, features and functions of the present invention are described in detail in the embodiments illustrated in the drawings, which are only preferred embodiments of the present invention, but the present invention is not limited by the drawings, and all equivalent embodiments modified or changed according to the idea of the present invention should fall within the protection scope of the present invention without departing from the spirit of the present invention covered by the description and the drawings.