阅读说明：本技术 内螺纹成型加工模具的游动芯头及其加工方法 (Movable core head of internal thread forming processing die and processing method thereof ) 是由 丁勇胜 景恒朝 张�杰 王传刚 于 2021-08-04 设计创作，主要内容包括：本申请涉及内螺纹加工技术领域,尤其涉及一种内螺纹成型加工模具的游动芯头及其加工方法,包括有YL10.2细颗粒硬质合金材质的基体。如此设置,游动芯头的材质设置为牌号为YL10.2的细颗粒硬质合金材质,在耐磨性上,改善游动芯头表面成型环沟,降低粘铜上有较明显的优势。(The application relates to the technical field of internal thread processing, in particular to a moving core print of an internal thread forming processing die and a processing method thereof, which comprises a substrate made of YL10.2 fine-particle hard alloy. So set up, the material of the core that moves about sets up to the fine grain carbide material that the trade mark is YL10.2, in the wearability, improves the core surface shaping ring groove that moves about, reduces to glue and has more obvious advantage on the copper.)

1. A moving core head of an internal thread forming processing die is characterized by comprising a substrate made of YL10.2 fine-particle hard alloy.

2. The floating core print of the internal thread forming processing die according to claim 1, wherein the base body comprises a guide section (1), a cylindrical body section (2), a transition deformation section (3) and a shaping section (4) which are coaxially and sequentially arranged, the outer diameter of the cylindrical body end is larger than that of the shaping section (4), and the guide section (1) and the transition deformation section (3) are arranged in a circular truncated cone shape.

3. The floating core print of the internal thread forming mold according to claim 2, wherein the transition deformation section (3) forms an angle of 22 degrees with the cylindrical section (2).

4. The floating core print of an internal thread forming die according to claim 2, wherein the guide section (1) forms an angle of 11 degrees with the cylindrical section (2).

5. The floating core print of an internal thread forming die according to claim 2, wherein a side of the guide section (1) remote from the cylindrical section (2) transitions through an arc.

6. The floating core print of an internal thread forming die according to claim 2, wherein a side of the shaping segment (4) away from the cylindrical segment (2) transitions through an arc.

7. The floating core of a female screw forming die according to claim 1, wherein said base body is provided with a center hole (5) penetrating in an axial direction.

8. A method for processing a moving core print of an internal thread forming and processing die, which is based on the moving core print of the internal thread forming and processing die as claimed in any one of claims 1 to 7, and is characterized by comprising the following steps:

grinding a YL10.2 fine particle hard alloy blank into a central hole (5) by using an internal grinding machine;

carrying out angle detection on the YL10.2 fine particle hard alloy blank by using a checking grinding wheel;

according to the angle detection result, finely grinding the YL10.2 fine particle hard alloy blank by using a cylindrical grinding machine;

polishing the YL10.2 fine particle hard alloy blank by using a polishing device.

9. The process of claim 8, wherein said refining includes:

semi-refining the YL10.2 fine particle cemented carbide blank using a model W20 grinding paste;

the YL10.2 fine particle cemented carbide stock was refined using a model W7 grinding paste.

10. The process of claim 8, wherein said polishing comprises:

polishing the YL10.2 fine particle hard alloy blank by using a grinding paste of W5 model;

the YL10.2 fine particle cemented carbide blank was polished using a model W0.5 abrasive paste.

Technical Field

The application relates to the technical field of internal thread processing, in particular to a moving core print of an internal thread forming and processing die and a processing method thereof.

Background

The method comprises an internal thread forming process, wherein a moving core head for forming is made of YG6 and YG8 common hard alloy materials, the moving core head cannot completely meet the requirements of the working conditions of a new forming process of high speed, large helix angle and high density thin and high tooth in the forming process, and the phenomena of annular groove, copper staining and roughness frequently occur on the position of a variable diameter belt of the moving core head, so that the service life is short, and even the scrapped condition occurs.

Therefore, how to solve the problem of short service life caused by the phenomena of ring groove, copper adhesion and roughness frequently occurring at the position of the variable diameter belt of the existing floating core head is a key technical problem to be solved by technical personnel in the field.

Disclosure of Invention

In order to overcome the problems in the related art at least to a certain extent, the application aims to provide the moving core print of the internal thread forming processing die and the processing method thereof, which can solve the problem that the service life is short due to the fact that the ring groove, copper staining and roughness often appear on the reducing belt part of the existing moving core print. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the application are described in detail in the following.

The application provides a core that moves about of internal thread shaping mold processing, including the base member of YL10.2 fine grain carbide material.

Preferably, the base body comprises a guiding section, a cylindrical section, a transition deformation section and a shaping section which are coaxial and sequentially arranged, the outer diameter of the cylindrical end is larger than that of the shaping section, and the guiding section and the transition deformation section are arranged in a circular truncated cone shape.

Preferably, the transition deformation section forms an included angle of 22 degrees with the cylindrical section.

Preferably, the guide section and the cylindrical section form an included angle of 11 degrees.

Preferably, one side of the guide section away from the cylindrical section is in arc transition.

Preferably, a side of the shaping section away from the cylindrical section is transited through an arc.

Preferably, the base body is provided with a central hole running through in the axial direction.

The application also provides a processing method of the moving core print of the internal thread forming and processing die, which is based on the moving core print of the internal thread forming and processing die and comprises the following steps:

grinding a central hole of YL10.2 fine-particle hard alloy blank by using an internal grinding machine;

carrying out angle detection on the YL10.2 fine particle hard alloy blank by using a checking grinding wheel;

according to the angle detection result, finely grinding the YL10.2 fine particle hard alloy blank by using a cylindrical grinding machine;

polishing the YL10.2 fine particle hard alloy blank by using a polishing device.

Preferably, said refining comprises:

semi-refining the YL10.2 fine particle cemented carbide blank using a model W20 grinding paste;

the YL10.2 fine particle cemented carbide stock was refined using a model W7 grinding paste.

Preferably, the polishing comprises:

polishing the YL10.2 fine particle hard alloy blank by using a grinding paste of W5 model;

the YL10.2 fine particle cemented carbide blank was polished using a model W0.5 abrasive paste.

The technical scheme provided by the application can comprise the following beneficial effects:

the matrix of the moving core is made of a fine-particle hard alloy material with the mark of YL10.2, and due to the characteristics of high strength, high hardness and high wear resistance, the surface forming annular groove of the moving core can be improved in wear resistance, copper adhesion is reduced, and the service life is prolonged.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a block diagram of a floating core of the present internal thread forming die, according to some exemplary embodiments.

In the figure: 1. a guide section; 2. a cylinder section; 3. a transition deformation section; 4. a shaping section; 5. a central bore.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus or methods consistent with aspects of the present application.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

Hereinafter, embodiments will be described with reference to the drawings. The embodiments described below do not limit the contents of the invention described in the claims. The entire contents of the configurations shown in the following embodiments are not limited to those required as solutions of the inventions described in the claims.

Referring to fig. 1, the present embodiment provides a floating core of an internal thread forming mold, which includes a substrate made of a fine-grained cemented carbide with a mark of YL10.2, and due to the characteristics of high strength, high hardness and high wear resistance, a forming ring groove on the surface of the floating core can be improved in wear resistance, copper adhesion is reduced, and the service life is prolonged.

It should be noted that, the existing core print is made of YG6, YG8, and when the product processing production is less than 20 tons, the reducing belt has ring groove. After the floating core head is made of fine-particle hard alloy material with the mark of YL10.2, the floating core head still has the characteristics of smooth surface, no annular groove and no copper adhesion even if the product is processed and produced by 30 tons.

So set up, the material of the core that moves about sets up to the fine grain carbide material that the trade mark is YL10.2, in the wearability, improves the core surface shaping ring groove that moves about, reduces to glue and has more obvious advantage on the copper.

In the embodiment, the base body comprises a guide section 1, a cylindrical section 2, a transition deformation section 3 and a shaping section 4 which are coaxial and sequentially arranged, and the outer diameters of connecting areas of the adjacent guide section 1, the cylindrical section 2, the transition deformation section 3 and the shaping section 4 are consistent, wherein the guide section 1 is in a circular truncated cone shape, the cross section of the guide section is gradually increased along the direction close to the cylindrical section 2, and the guide section is used for guiding the copper pipe to the cylindrical section 2; the outer diameter of the cylinder end is larger than that of the shaping section 4, the transition deformation section 3 is in a round table shape, the cross section of the transition deformation section is gradually increased along the direction close to the cylinder section 2, and the transition deformation section is used for transitionally deforming the copper pipe of the cylinder section 2 to the shaping section 4.

In some preferred schemes, the included angle formed by the transition deformation section 3 and the cylindrical section 2 is 22 degrees, which is beneficial to ensure the smoothness of the copper pipe from the cylindrical section 2 to the shaping section 4, and simultaneously reduces the abrasion to the transition deformation section 3.

In order to avoid the problem that the expansion speed of the copper pipe is high, the included angle formed by the guide section 1 and the cylinder section 2 is 11 degrees, so that the copper pipe can be prevented from being cracked and damaged, and the rejection rate is reduced.

Wherein, one side of the guide section 1 far away from the cylinder section 2 is in arc transition; the side edge of the shaping section 4 far away from the cylinder section 2 is in circular arc transition, so that the edge angle can be reduced, and the copper pipe is protected.

And the base body is provided with a central hole 5 which penetrates along the axial direction and is used for being connected with the core bar, so that the movement of the moving core head is convenient to realize.

The application also provides a processing method of the moving core print of the internal thread forming and processing die, which is based on the moving core print of the internal thread forming and processing die and comprises the following steps:

grinding a YL10.2 fine particle hard alloy blank into a central hole 5 by using an internal grinding machine;

so as to fix YL10.2 fine particle hard alloy blank, facilitate the subsequent processing of the outer circumference, at the same time, when using, can be connected with the core bar, facilitate the movement of the moving core head.

Carrying out angle detection on the YL10.2 fine particle hard alloy blank by using a checking grinding wheel;

here, according to the design requirement, the angle detection is carried out on YL10.2 fine particle hard alloy blank, and then the depth and the size of the subsequent processing of the outer circumference surface are judged,

according to the angle detection result, finely grinding the YL10.2 fine particle hard alloy blank by using a cylindrical grinding machine;

the cylindrical grinding machine performs semi-fine grinding and fine grinding according to an angle detection result and design requirements, the size requirement is determined, a certain tolerance requirement is required, the tolerance requirement is + 005 mm, and the outer surface of the moving core head can be automatically processed by the cylindrical grinding machine.

Polishing the YL10.2 fine particle hard alloy blank by using a polishing device.

After polishing, the smoothness of the outer surface of the moving core head can be enhanced, and the smoothness of the drawn copper pipe is improved.

So set up, the material of the core that moves about sets up to the fine grain carbide material that the trade mark is YL10.2, on the wearability, improves the core surface shaping ring groove that moves about, reduces to glue and has more obvious advantage on the copper.

In some preferred embodiments, the fine grinding of the cylindrical grinding machine includes:

semi-refining the YL10.2 fine particle cemented carbide blank using a model W20 grinding paste;

the YL10.2 fine particle cemented carbide stock was refined using a model W7 grinding paste.

So, use assorted corresponding grinding paste to carry out half accurate grinding and correct grinding, be favorable to promoting the correct grinding effect.

In some preferred embodiments, the polishing of the polishing apparatus comprises:

polishing the YL10.2 fine particle hard alloy blank by using a grinding paste of W5 model;

the YL10.2 fine particle cemented carbide blank was polished using a model W0.5 abrasive paste.

Therefore, the polishing effect can be improved by polishing for multiple times through the grinding pastes of different models, and the smoothness of the outer surface is favorably improved.

It should be noted that the terms "first," "second," and the like, as used herein, are not intended to limit the specific order, but merely to distinguish one element or function from another. The stated "horizontal", "vertical", "up", "down", "left" and "right" are the moving core heads of the internal thread forming processing mould and the processing method thereof in the state of laying as shown in figure 1.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments. The multiple schemes provided by the application comprise basic schemes of the schemes, are independent of each other and are not restricted to each other, but can be combined with each other under the condition of no conflict, so that multiple effects are achieved together.

While embodiments of the present application have been shown and described above, it is to be understood that the above embodiments are exemplary and not to be construed as limiting the present application, and that changes, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.