阅读说明：本技术 一种用于拐角零件平面度检测的检具 (A examine utensil for turning part plane degree detects ) 是由 吴焕兴 许洪霞 于 2019-02-28 设计创作，主要内容包括：本发明涉及一种用于拐角零件平面度检测的检具,包括本体,所述拐角零件包括被测平面和侧壁面,所述本体的前端具有检测头,且该检测头具有圆滑状的检测面,检测时,上述检测面与上述侧壁面相抵,上述本体的底面具有向后凹陷的前低后高的检测台阶,该检测台阶沿本体前后方向的长度大于被测平面在该方向上的长度。本发明能避免检测头沿侧壁面移动时划伤零件表面,检测台阶的设置能实现对被测平面的平面度的检测,且该检测台阶的高度由平面度要求和零件的厚度决定,检测时,检测头的检测面沿侧壁面移动,当检测台阶与被测平面没有接触点时,被测平面的平面度符合要求,当检测台阶与被测平面有接触点时,则被测平面的平面度超出要求。(The invention relates to a checking fixture for detecting the flatness of a corner part, which comprises a body, wherein the corner part comprises a detected plane and a side wall surface, the front end of the body is provided with a detecting head, the detecting head is provided with a smooth detecting surface, the detecting surface is abutted against the side wall surface during detection, the bottom surface of the body is provided with a detecting step which is recessed backwards and is low in front and high in back, and the length of the detecting step along the front and back directions of the body is greater than that of the detected plane along the direction. The invention can avoid scratching the surface of the part when the detection head moves along the side wall surface, the arrangement of the detection step can realize the detection of the flatness of the detected plane, the height of the detection step is determined by the flatness requirement and the thickness of the part, during the detection, the detection surface of the detection head moves along the side wall surface, when the detection step has no contact point with the detected plane, the flatness of the detected plane meets the requirement, and when the detection step has a contact point with the detected plane, the flatness of the detected plane exceeds the requirement.)

1. The detecting tool for detecting the flatness of the corner part comprises a body (1), wherein the corner part (3) comprises a detected plane (31) and a side wall surface (32), and is characterized in that a detecting head (2) is arranged at the front end of the body (1), the detecting head (2) is provided with a smooth detecting surface (21), the detecting surface (21) is in contact with the side wall surface (32) during detection, a detecting step (14) which is concave backwards is arranged on the bottom surface of the body (1), and the length of the detecting step (14) along the front-back direction of the body (1) is larger than that of the detected plane (31) in the direction.

2. The checking fixture according to claim 1, characterized in that the detection surface (21) has a horizontal clearance with the lower front end surface (11) of the body (1).

3. The testing fixture according to claim 1, characterized in that the testing surface (21) protrudes out of the body (1) or the lower front end surface (11) of the body (1) is recessed backwards.

4. The testing fixture according to any one of claims 1 to 3, characterized in that the testing head (2) is integral with the body (1).

5. The testing fixture according to claim 4, wherein the body (1) is block-shaped, the testing head (2) is also block-shaped and has a thickness smaller than that of the body (1), and grip grooves (13) for fingers to be inserted are formed on two side surfaces of the body (1).

6. The testing fixture according to any one of claims 1 to 3, wherein the testing head (2) is a roller rotatably disposed on the body (1), the roller rotates around a central axis perpendicular to the tested plane (31), and the roller has a smooth wheel surface, and the wheel surface when the roller contacts the side wall surface (32) is the testing surface (21).

7. The testing fixture according to claim 6, characterized in that the number of the testing heads (2) is at least two and is arranged side by side along the left-right direction of the body (1).

8. The testing fixture according to claim 6, wherein the body (1) is block-shaped, the front end of the body (1) is provided with a through groove (12) which is opened forwards, the testing head (2) is arranged at the opening end of the through groove (12) through an upper rotating shaft and a lower rotating shaft, and a gap is reserved between the testing head (2) and the rear groove wall of the through groove (12).

9. The testing fixture according to claim 8, wherein most of the testing heads (2) are located in the through groove (12), or at most half of the testing heads (2) are located in the through groove (12), the front edges of the upper and lower groove walls of the through groove (12) respectively extend horizontally and outwards to form semicircular protective ledges (15) with the corresponding rotating shaft as the center, the front ends of the protective ledges (15) are respectively formed with straight sections, and the sections on the protective ledges (15) on the lower side of the testing heads (2) are the front end surfaces (11).

10. The testing fixture according to claim 8, characterized in that the body (1) is formed with holding grooves (13) for fingers to insert into on both side surfaces of the rear end.

Technical Field

The invention relates to the field of flatness detection, in particular to a detection tool for detecting the flatness of a corner part.

Background

For detecting the flatness of a part with a corner, the following two detection methods are commonly used at present: (1) attaching a measured plane of the sheet metal part to a horizontal platform, and measuring a gap between the sheet metal part and the platform by using a feeler gauge so as to reflect the flatness by the gap; (2) a measured plane of the sheet metal part is attached to the horizontal platform, and the height fluctuation of the upper surface of the sheet metal part is measured by the aid of a dial indicator matched with a cantilever so as to reflect the flatness by means of height variation.

The two detection methods have the following problems: (1) inaccurate detection: the clearance gauge has a width, the gap between the measured metal plate and the plane is arched, and the measured value is smaller than the actual value; (2) the measurement efficiency is low: the feeler gauge and the dial gauge belong to single-point measurement, and have poor measurement operability and low efficiency for longer parts; (3) for common sheet metal bending, the flatness requirements of the bending R angle and the bevel angle are met, and the measurement difficulty is high (the height of the R angle or the height of the uneven angle cannot be distinguished). From the foregoing, it can be seen that there is still a need for an improved inspection tool for inspecting the flatness of corner parts.

Disclosure of Invention

The invention aims to solve the first technical problem of providing a gauge for detecting the flatness of a corner part, which is used for accurately detecting the flatness of the corner part.

The second technical problem to be solved by the invention is to provide a checking fixture for detecting the flatness of the corner part, which is convenient to use and high in detection efficiency aiming at the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows: a detection tool for detecting the flatness of a corner part comprises a body, wherein the corner part comprises a detected plane and a side wall surface, and is characterized in that a detection head is arranged at the front end of the body and provided with a smooth detection surface, the detection surface is in contact with the side wall surface during detection, a detection step which is recessed backwards and is low in front and high in back is arranged on the bottom surface of the body, and the length of the detection step along the front-back direction of the body is greater than that of the detected plane in the front-back direction.

For avoiding the R angle of the part better, a horizontal gap is formed between the detection surface and the lower front end surface of the body, so that the interference of the R angle to the flatness detection can be avoided.

The horizontal gap between the detection surface and the lower front end surface of the body can be realized in various specific ways, and preferably, the detection surface protrudes out of the body or the lower front end surface of the body is recessed backwards.

In order to stabilize the internal structure of the checking fixture, preferably, the detecting head and the body are integrated.

Further, preferably, the body has a block shape, the detection head has a block shape, the thickness of the detection head is smaller than that of the body, and grip grooves into which fingers are inserted are formed on both side surfaces of the body. Through setting up as above make examine utensil simple structure to make things convenient for operating personnel's operation.

In order to improve the detection efficiency, preferably, the detection head is a roller rotatably disposed on the body, the roller rotates around a central axis perpendicular to the plane to be detected, the roller has a smooth wheel surface, and the wheel surface when the roller contacts with the side wall surface is the detection surface. The rolling along the side wall face of gyro wheel can make the utensil of examining move along the measured plane fast like this to realize the short-term test to the plane degree of the measured plane.

In order to further improve the moving stability of the checking fixture along the detected plane, at least two detecting heads are arranged in parallel along the left and right direction of the body.

In order to make the checking fixture simple in integral structure and enable the detection head to smoothly rotate, the body is in a block shape, the front end of the body is provided with a through groove with a forward opening, the detection head is arranged at the opening end of the through groove through an upper rotating shaft and a lower rotating shaft, and a gap is reserved between the detection head and the rear groove wall of the through groove.

The rotation of the detection head in the body can be realized in various specific ways, preferably, most of the detection head is located in the through groove, or at most half of the detection head is located in the through groove, the front edges of the upper groove wall and the lower groove wall of the through groove respectively extend outwards and horizontally to form semicircular protective convex edges with the corresponding rotating shaft as the center of a circle, and the front ends of the protective convex edges are respectively formed with straight sections.

For the operation of operating personnel, be formed with the groove of holding that supplies the finger embedding on the both sides side of the rear end of body respectively.

Compared with the prior art, the invention has the advantages that: the detection tool is provided with the detection head, the detection head is provided with the smooth detection surface, so that the surface of a part can be prevented from being scratched when the detection head moves along the side wall surface, the detection of the flatness of the detected plane can be realized and the detection accuracy is improved through the arrangement of the detection step, the height of the detection step is determined by the flatness requirement and the thickness of the part, during detection, the detection surface of the detection head moves along the side wall surface, when the detection step has no contact point with the detected plane, the flatness of the detected plane meets the requirement, and when the detection step has a contact point with the detected plane, the flatness of the detected plane exceeds the requirement.

Drawings

FIG. 1 is a schematic structural diagram of a gauge in embodiment 1 of the invention;

FIG. 2 is a schematic view of the structure of FIG. 1 in another direction;

FIG. 3 is a schematic view of the structure of FIG. 1 in still another direction;

FIG. 4 is a schematic view of a use state of the gauge in embodiment 1 of the present invention;

FIG. 5 is a schematic view of the structure of FIG. 4 in another direction;

FIG. 6 is a cross-sectional view taken along A-A of FIG. 5;

FIG. 7 is a schematic structural diagram of a gauge in embodiment 2 of the present invention;

fig. 8 is a schematic structural diagram of a detection tool in embodiment 3 of the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.