阅读说明：本技术 一种螺纹轴线规及其螺纹部加工工艺 (Thread axis gauge and thread part machining process thereof ) 是由 文发模 张雪 邓启国 于 2021-01-19 设计创作，主要内容包括：本专利涉及螺纹孔位置度检测技术领域,具体是一种螺纹轴线规及其螺纹部加工工艺,一种螺纹轴线规包括螺纹部、光杆部和安装部,所述螺纹部、光干部和安装部依次连接,所述光杆部为圆柱形,且所述光杆部与螺纹部同轴,所述螺纹部包括依次设置的螺纹通端、螺纹渐变段和螺纹止端,所述螺纹止端与光杆部连接,所述螺纹通端的中径为d-(2通),所述螺纹止端的中径为d-(2止),所述螺纹渐变段的中径由螺纹通端中径渐变为螺纹止端中径,本方案螺纹部旋入螺纹孔时通过螺纹中径的配合不断消除轴向间隙,并找到螺纹轴心线,然后配合三坐标进行检测,从而判断螺纹孔的位置度误差。(The utility model relates to a screw hole position degree detects technical field, specifically is a screw axis rule and screw thread portion processing technology thereof, a screw axis rule include screw thread portion, polished rod portion and installation department, screw thread portion, light cadre and installation department connect gradually, polished rod portion is cylindrical, just polished rod portion is coaxial with screw thread portion, screw thread portion leads to end, screw thread gradual change section and screw thread dead end including the screw thread that sets gradually, the screw thread dead end is connected with polished rod portion, the well footpath that the screw thread leads to the end is d 2-way pipe The pitch diameter of the thread stop end is d 2 stop The pitch diameter of the thread gradual change section is gradually changed into a thread stop pitch diameter from a thread through pitch diameter, the axial clearance is continuously eliminated through the matching of the thread pitch diameter when the thread portion is screwed into the threaded hole in the scheme, the axial lead of the thread is found, and then the three-coordinate detection is carried out through the matching, so that the position degree error of the threaded hole is judged.)

1. A thread axis gauge, characterized in that: including screw thread portion, polished rod portion and installation department, screw thread portion, light cadre and installation department connect gradually, polished rod portion is cylindrical, just polished rod portion is coaxial with screw thread portion, screw thread portion leads to end, screw gradual change section and screw thread dead end including the screw thread that sets gradually, the screw thread dead end is connected with polished rod portion, the pitch of screw thread lead to end, screw gradual change section and screw thread dead end is P, the major diameter of screw thread lead to end, screw thread gradual change section and screw thread dead end is d, the path of screw thread lead to end, screw thread gradual change section and screw thread dead end is E, the path of screw thread lead to end is d_{2-way pipe}The pitch diameter of the thread stop end is d_{2 stop}The pitch diameter of the thread gradual change section is gradually changed from the pitch diameter of the through end of the thread to the pitch diameter of the stop end of the thread, and the pitch diameters of the thread surfaces of the through end of the thread, the thread gradual change section and the stop end of the thread, which face the smooth rod part, are all d_{2 stop}The length of the thread part is 1.5 xd, the length of the thread through end is 0.9 xd, the length of the thread stop end is 1.5 xp, and the rest part of the thread part is a thread gradual change section.

2. A thread gauge according to claim 1, wherein: the end part of the thread part and the end part of the installation part are both provided with a central hole which is coaxial with the polished rod part and the thread part.

3. A thread gauge according to claim 2, wherein: the installation department is the cuboid, just the installation department central point falls on polished rod portion axis.

4. A thread gauge according to claim 3, wherein: the length of installation department is 5 mm.

5. A process for working a threaded portion of a threaded axial gauge as claimed in any one of claims 1 to 4, wherein: the method comprises the following steps:

the method comprises the following steps: preparing a rough machining thread axis gauge, wherein the rough machining thread axis gauge comprises a part to be machined, a polished rod part and an installation part, and then quenching and tempering are carried out to enable the surface hardness of the rough machining thread axis gauge to reach 56-58 HRC;

step two: grinding the end of the thread to obtain a large diameter d, a small diameter E and a medium diameter d_{2 stop}A thread section with a pitch P and a length of 1.5 xd;

step three: and (4) grinding a finished product, namely grinding the thread surface of the thread section ground in the step two, which is opposite to the polished rod part, and grinding a thread through end, a thread gradual change section and a thread stop end.

Technical Field

The invention relates to the technical field of detection of position degree of a threaded hole, in particular to a threaded axis gauge and a machining process of a threaded part of the threaded axis gauge.

Background

Threaded connections are a relatively widely used connection, and therefore, detection of the location of threaded holes is particularly important. Currently, the position of a threaded hole is detected mainly by the following 3 ways:

the first mode is to directly perform sampling evaluation on the surface of the threaded hole by using three coordinates, namely, sampling points in the X direction and the Y direction of the threaded inner hole by using a three-coordinate probe, fitting the points into a circle by using software of a three-coordinate system, and finding the center of the circle, thereby performing position degree evaluation relative to a reference. The problem of large sampling point errors exists in the mode, the reason is that the probe can possibly obtain the maximum value and can also obtain the minimum value when sampling points are carried out on the inner hole of the thread, and the sampling point value consistency is poor.

The second mode is that a threaded through end mandrel is used for auxiliary measurement and evaluation, namely, corresponding threaded mandrels are manufactured according to the specifications of threaded holes, the middle diameter sizes of the mandrels are grouped according to the thread matching grade, each threaded mandrel in the current market is divided into 4 groups, the threaded mandrels are respectively screwed into the threaded holes during actual use, threaded mandrels with small matching gaps are judged and selected according to subjective consciousness of people, and then position degree evaluation and detection are carried out by matching with three coordinates; the method has the defects that the number of the threaded mandrels is too large, the management is disordered, the matching clearance is judged and selected through the subjective consciousness of people when the method is used, and large human judgment errors exist, so that the final result deviates from the actual size.

The third mode is that whether the position degree of the threaded hole is qualified or not is judged through the comprehensive inspection tool, namely, the corresponding comprehensive inspection tool is manufactured according to the position coordinate of the threaded hole of the product, then the product is placed on the comprehensive inspection tool, the polished rod mandrel is inserted into the threaded hole, the product can be smoothly inserted into the threaded hole, and the product is judged to be qualified, otherwise, the product is unqualified. However, the detection mode has the problems that the comprehensive detection tool is difficult to manufacture, and the precision of the detection tool is ultra-poor, and secondly, the detection mode can only judge whether the position degree of a product is qualified or not and cannot judge the ultra-poor data of the position of a specific direction relative to the theoretical size.

Disclosure of Invention

The invention aims to provide a thread axis gauge and a thread part machining process thereof so as to solve the problems in the background art.

In order to achieve the above object, the basic scheme of the invention is as follows:

the utility model provides a threaded shaft gauge, includes screw thread portion, smooth rod portion and installation department, screw thread portion, smooth rod portion and installation department connect gradually, smooth rod portion is cylindrical, just smooth rod portion and screw threadThe part is coaxial, screw portion is including the screw thread logical end, screw thread transition and the screw thread ending that set gradually, the screw thread ending is connected with polished rod portion, the pitch of screw thread logical end, screw thread transition and screw thread ending is P, the big footpath of screw thread logical end, screw thread transition and screw thread ending is d, the path of screw thread logical end, screw thread transition and screw thread ending is E, the path of screw thread logical end is d for d_{2-way pipe}The pitch diameter of the thread stop end is d_{2 stop}The pitch diameter of the thread gradual change section is gradually changed from the pitch diameter of the through end of the thread to the pitch diameter of the stop end of the thread, and the pitch diameters of the thread surfaces of the through end of the thread, the thread gradual change section and the stop end of the thread, which face the smooth rod part, are all d_{2 stop}The length of the thread part is 1.5 xd, the length of the thread through end is 0.9 xd, the length of the thread stop end is 1.5 xp, and the rest part of the thread part is a thread gradual change section.

The beneficial effects of the basic scheme are as follows: (1) according to the scheme, the axial clearance is continuously eliminated through the matching of the pitch diameters of the threads when the threaded portion is screwed into the threaded hole, the axial lead of the threads is found, and then three coordinates are matched for detection, so that the position degree error of the threaded hole is judged.

(2) The screw thread portion has the screw thread end that leads to promptly in this scheme, has the screw thread dead end again to link together screw thread end and screw thread dead end through the screw thread transition, consequently every screw thread specification only need make a screw thread axis rule can satisfy the requirement, thereby has reduced the management quantity, and eliminates artificial subjective meaning and judge clearance error.

(3) According to the scheme, the axis of the threaded hole can be accurately found, because the front end of the threaded axis gauge is the threaded part, the rear end of the threaded axis gauge is the polished rod part, and the polished rod part and the threaded part are coaxial, the axis can be accurately found after the threaded axis gauge is locked, the three-coordinate system is used for sampling the polished rod part, the center of a circle is found after software fitting, and the position error of the thread relative to a reference is evaluated.

Further, the end part of the thread part and the end part of the installation part are both provided with a central hole which is coaxial with the polished rod part and the thread part. The coaxial central hole is convenient for processing the thread part and ensures the coaxiality of the thread part and the polished rod part.

Further, the length of installation department is 5 mm. The scheme is a specific selection of a basic scheme.

A thread part machining process of a thread axis gauge comprises the following steps:

the method comprises the following steps: preparing a rough machining thread axis gauge, wherein the rough machining thread axis gauge comprises a part to be machined, a polished rod part and an installation part, and then quenching and tempering are carried out to enable the surface hardness of the rough machining thread axis gauge to reach 56-58 HRC;

step two: grinding the end of the thread to obtain a large diameter d, a small diameter E and a medium diameter d_{2 stop}A thread section with a pitch P and a length of 1.5 xd;

step three: and (4) grinding a finished product, namely grinding the thread surface of the thread section ground in the step two, which is opposite to the polished rod part, and grinding a thread through end, a thread gradual change section and a thread stop end.

The scheme has the beneficial effects that: (1) the scheme is firstly quenched and tempered, the surface hardness of the rough-machined thread axis gauge is increased, the threaded part is firmer and more wear-resistant, and the service life is prolonged.

(2) This scheme is earlier ground whole section of screw portion according to the parameter of screw thread dead end, then is wearing out the flank of screw of smooth rod portion dorsad according to the concrete parameter of screw thread lead to end, screw thread gradual change section to make screw thread lead to end, screw thread gradual change section, screw thread dead end reach the specified parameter requirement, but whole section screw portion keeps unanimous towards the flank of screw of smooth rod portion.

Drawings

FIG. 1 is an axial cross-sectional view of an embodiment of the present invention.

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.

Reference numerals in the drawings of the specification include: the smooth rod part 1, the mounting part 2, the central hole 3, the thread through end 4, the thread gradual change section 5 and the thread stop end 6.

Examples

Substantially as shown in figure 1: the utility model provides a threaded shaft rule, includes screw thread portion, polished rod portion 1 and installation department 2, and screw thread portion, polished rod portion and installation department 2 connect gradually, and polished rod portion 1 is cylindrical, and polished rod portion 1 is coaxial with screw thread portion, and screw thread portion tip and 2 tip of installation department all are equipped with polished rod portion 1, the coaxial centre bore 3 of screw thread portion, and the length of installation department 2 is 5 mm.

Thread portion leads to end 4 including the screw thread that sets gradually, screw thread transition 5 and screw thread end 6, and screw thread end 6 is connected with smooth rod portion 1, and the pitch of screw thread lead to end 4, screw thread transition 5 and screw thread end 6 is P, and the major diameter of screw thread lead to end 4, screw thread transition 5 and screw thread end 6 is d, and the path of screw thread lead to end 4, screw thread transition 5 and screw thread end 6 is E, and the path is d for the middle diameter of screw thread lead to end 4_{2-way pipe}The pitch diameter of the thread stop 6 is d_{2 stop}The pitch diameter of the thread gradual change section 5 is gradually changed from the pitch diameter of the thread through end 4 to the pitch diameter of the thread stop end 6, and the pitch diameters of the thread through end 4, the thread gradual change section 5 and the thread stop end 6 facing the polished rod part 1 are d_{2 stop}The length of the thread part is 1.5 x d, wherein the length of the thread end 4 is 0.9 x d, the length of the thread end 6 is 1.5 x P, and the thread transition section 5 is the rest of the thread part. P, d, E, d_{2-way pipe}、d_{2 stop}The parameters are set according to the parameters of the threaded hole to be detected, and no specific description is given in this embodiment.

The specific implementation process is as follows: when the thread gauge is used, a corresponding thread axis gauge is selected according to the thread specification of a detected product; then, the top mounting part 2 is held by hand, the thread part of the thread axis gauge is slowly screwed into the thread hole to the thread stop end 6 part, and the thread axis gauge is locked; and finally, sampling points of the polished rod part 1 of the thread axis gauge by using three coordinates, and automatically fitting the circle center or the axis line by using software so as to evaluate the position tolerance of the threaded hole.

A thread part machining process of a thread axis gauge comprises the following steps:

the method comprises the following steps: preparing a rough machining thread axis gauge, wherein the rough machining thread axis gauge comprises a part to be machined, a polished rod part and an installation part, and then quenching and tempering are carried out to enable the surface hardness of the rough machining thread axis gauge to reach 56-58 HRC;

step two: grinding the end of the thread to obtain a large diameter d, a small diameter E and a medium diameter d_{2 stop}A thread section with a pitch P and a length of 1.5 xd;

step three: and (4) grinding a finished product, namely grinding the thread surface of the thread section ground in the step two, which is opposite to the polished rod part, and grinding a thread through end, a thread gradual change section and a thread stop end.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The foregoing is merely an example of the present invention, and common general knowledge in the field of known specific structures and characteristics is not described herein in any greater extent than that known in the art at the filing date or prior to the priority date of the application, so that those skilled in the art can now appreciate that all of the above-described techniques in this field and have the ability to apply routine experimentation before this date can be combined with one or more of the present teachings to complete and implement the present invention, and that certain typical known structures or known methods do not pose any impediments to the implementation of the present invention by those skilled in the art. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.