CN117346641A

CN117346641A - Detection device for measuring flatness of hole periphery and flatness measuring method

Info

Publication number: CN117346641A
Application number: CN202311181893.XA
Authority: CN
Inventors: 林轶玮; 赵汉兴; 陈祖兴; 李卫; 廖勇
Original assignee: Dongfeng Liuzhou Motor Co Ltd
Current assignee: Dongfeng Liuzhou Motor Co Ltd
Priority date: 2023-09-13
Filing date: 2023-09-13
Publication date: 2024-01-05

Abstract

The invention discloses a detection device for measuring the flatness of a hole periphery and a flatness measurement method, wherein the detection device comprises a detection part, a connecting rod and a matching part, an abdication port is formed on the side part of the detection part and is used for providing an abdication space when the detection part passes through a hole of a workpiece to be detected, the connecting rod is perpendicular to the upper surface of the detection part, one end of the connecting rod is arranged on the detection part, a first scale mark is arranged on the periphery of the connecting rod, the matching part is arranged on the connecting rod in a sliding manner along the extending direction of the connecting rod, the matching part is provided with a detection position for clamping the workpiece to be detected together with the detection part to measure and a removal position far away from the detection part on the moving stroke of the matching part, the matching part is slid along the connecting rod to be abutted against the upper surface of the workpiece after passing through the hole of the workpiece to be detected, the matching part is abutted against the lower surface of the workpiece, the workpiece is clamped together with the detection part to measure, and the measured value is compared with the thickness value of the known workpiece, and the flatness parameter of the hole periphery can be obtained.

Description

Detection device for measuring flatness of hole periphery and flatness measuring method

Technical Field

The invention relates to the technical field of detection, in particular to a detection device for measuring flatness of a hole periphery and a flatness measuring method.

Background

In the automobile part industry, in the processing process of each part, a circle of plane around the surface of the hole is used as a matching end for connecting other parts when the hole and the shaft are matched, and besides the requirements on the position precision and the processing precision, the flatness with certain precision requirements are also required, that is to say, the flatness of the surface around the hole is required to be controlled within a specified range so as to meet the assembly requirements.

Regarding the prior art, the flatness detection method for the corresponding plane of the part hole is roughly divided into three types: firstly, the traditional flatness detection tool is adopted for detection, the detection tool is large in size and not easy to take and put, a product is required to be dissected in advance, a detected surface is exposed, a part support body is manufactured, detection pins are inserted after all positions are positioned for detection, the measurement process is complex, the cost consumption is high, and the limitation of parts with small parts is large; secondly, a mode of inserting a large-end go-no-go gauge is adopted, the operation is simple, but the relative measurement result is inaccurate; thirdly, three-coordinate detection is adopted, the shape of many small and medium parts is complex, the precision requirement is high, the traditional measurement mode can not meet the detection requirement, the detection is needed to be carried out on a three-coordinate measuring instrument, the detection precision is high, but the efficiency is low, and the cost investment is large.

Disclosure of Invention

The invention mainly aims to provide a detection device for measuring flatness of a hole periphery and a flatness measuring method, and aims to provide the detection device for measuring flatness of the hole periphery, which has the advantages of relatively small volume, simple structure, lighter operation, capability of saving time required for measurement and capability of measuring on a production site.

In order to achieve the above object, the present invention provides a detection device for measuring flatness of a hole circle, wherein the detection device for measuring flatness of a hole circle comprises:

the side part of the detection part is provided with a yielding opening for providing a yielding space when the detection part passes through a hole of a workpiece to be detected;

the connecting rod is perpendicular to the upper surface of the detection part, one end of the connecting rod is arranged on the detection part, and a first scale line is arranged on the periphery of the connecting rod; the method comprises the steps of,

the matching part is arranged on the connecting rod in a sliding way along the extending direction of the connecting rod, and the matching part is provided with a detection position for clamping the workpiece to be detected together with the detection part on the moving stroke of the matching part so as to measure and a moving-out position far away from the detection part.

Optionally, the matching part comprises a main body part and an observation part protruding from the middle part of the upper surface of the main body part, and the upper surface of the matching part is provided with a through hole penetrating through the observation part and the main body part and is used for being sleeved on the connecting rod in a sliding way;

the observation part is provided with an exposure opening at the side part for reading the measured value, and a second scale mark is arranged at the position of the observation part corresponding to the exposure opening.

Optionally, the connecting rod is provided with a guide groove extending along the extending direction of the connecting rod, a guide protrusion corresponding to the guide groove is convexly arranged at the inner side of the mounting hole, and the guide protrusion is slidably mounted in the guide groove.

Optionally, a mounting groove is formed in the inner side wall of the mounting hole, an elastic piece is connected to the bottom of the mounting groove, and the guiding protruding portion is connected with the elastic piece.

Optionally, the detecting portion includes a body portion and two clamping arms formed on two sides of the yielding port, and each clamping arm is hinged on the body portion.

Optionally, the detecting device for measuring the flatness of the hole periphery includes a detachable connection structure, and the detachable connection structure is disposed between the detecting portion and the connecting rod.

Optionally, a screw hole is formed in the detecting part in a penetrating manner, threads are formed on the periphery of the connecting end of the connecting rod, and the connecting rod is connected with the detecting part in a threaded manner;

the detachable connection structure comprises the screw hole and the screw thread.

Optionally, the detachable connection structure includes first magnetism portion and second magnetism portion, be formed with the spread groove on the detection portion, install on the spread groove first magnetism portion, be equipped with the second magnetism portion on the link of connecting rod, first magnetism portion with second magnetism portion magnetism is different.

Optionally, a plurality of detection convex parts with the same height are arranged on the end surface of the matching part facing to one side of the detection part at intervals.

The invention also provides a flatness measuring method for measuring flatness at a detection surface of a hole to be detected, wherein the hole to be detected also comprises a back surface opposite to the detection surface, and the measuring method comprises the following steps:

selecting a proper detection part according to the size of a hole to be detected;

assembling a proper detection part and a connecting rod into a primary assembly part, wherein a yielding port is formed on the side part of the detection part;

the primary assembly part is transversely arranged in the hole to be detected, so that two clamping arms of the abdication port are respectively arranged at two sides of the hole to be detected;

rotating the connecting rod in a way that the axis of the connecting rod gradually approaches to the axis of the hole to be detected, so that the detection part moves from the detection surface side of the hole to be detected to the back surface side;

the matching part is sleeved on the connecting rod in a sliding way and is positioned at one side of the detection surface to form a measurement structure, wherein the matching part is provided with an exposure opening;

and rotating the measuring structure to enable the measuring structure to be stagnant at different positions, so as to obtain actual scale values correspondingly arranged on the connecting rod through the exposure opening.

According to the technical scheme provided by the invention, after the detection part passes through the hole of the workpiece to be detected and is abutted against the lower surface of the workpiece, the matching part slides along the connecting rod towards the direction close to the detection part and is abutted against the upper surface of the workpiece, the workpiece is clamped by the detection part together for measurement, the measured value corresponding to one scale mark of the connecting rod Zhou Cedi is read, the measured value is compared with the thickness value of the known workpiece to obtain the planeness parameter of the hole circle, the operation is simple, the use time is short, the workpiece itself does not need to be dismantled, and the measurement can be carried out on the production site.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of an embodiment of a detecting device according to the present invention;

FIG. 2 is a schematic perspective view of the engaging portion in FIG. 1;

FIG. 3 is a schematic perspective view of the detecting unit in FIG. 1;

FIG. 4 is a schematic perspective view of the connecting rod of FIG. 1;

FIG. 5 is a schematic view of the structure of the inspection device (clamping a workpiece to be inspected);

FIG. 6 is a flow chart of an embodiment of a flatness measurement method according to the present invention;

fig. 7 is a schematic diagram of the flatness measuring method of fig. 6.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				100	Detection device	31	Main body part
1	Detection part	32	Observation unit
				11	Abdication port	321	Exposing port
12	Body part	33	Through hole
				13	Clamping arm	34	Mounting hole
2	Connecting rod	35	Guide projection
				21	Guide groove	4	Screw hole
3	Mating part	5	Screw thread

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

In order to solve the above problems, the present invention provides a detection device for measuring flatness of a hole circle, and fig. 1 to 5 are specific embodiments of the detection device for measuring flatness of a hole circle provided by the present invention.

Referring to fig. 1, the detecting device 100 for measuring flatness of a hole circle includes a detecting portion 1, a connecting rod 2 and a matching portion 3, a yielding opening 11 is formed at a side portion of the detecting portion 1, so as to provide a yielding space when the detecting portion 1 passes through a hole of a workpiece to be detected, the connecting rod 2 is perpendicular to an upper surface of the detecting portion 1, one end of the connecting rod is mounted on the detecting portion 1, a first scale line is disposed on a peripheral side of the connecting rod 2, the matching portion 3 is slidably disposed on the connecting rod 2 along an extending direction of the connecting rod 2, and the matching portion 3 has a detecting position for clamping the workpiece to be detected together with the detecting portion 1 on a moving stroke thereof so as to measure and a moving-out position away from the detecting portion 1.

According to the technical scheme provided by the invention, after the detection part 1 passes through the hole of the workpiece to be detected and is abutted against the lower surface of the workpiece, the matching part 3 slides along the connecting rod 2 towards the direction close to the detection part 1 and is abutted against the upper surface of the workpiece, the workpiece is clamped by the detection part 1 together for measurement, the measured value corresponding to the first scale line on the periphery of the connecting rod 2 is read, the measured value is compared with the thickness value of the known workpiece, the flatness parameter of the hole periphery can be obtained, the operation is simple, the time consumption is short, the workpiece itself does not need to be dismantled, and the measurement can be carried out on the production site.

In this embodiment, the measured scale value is a thickness scale value, and since the thickness of the workpiece after the machining is completed is known, the flatness value can be obtained by comparing the measured thickness value with the known thickness value, for example, the difference between the measured thickness value and the known thickness value may be obtained.

Specifically, in order to improve accuracy of reading the scale value, in this embodiment, the matching portion 3 includes a main body portion 31 and an observation portion 32 protruding from a middle portion of an upper surface of the main body portion 31, a through hole 33 penetrating the observation portion 32 and the main body portion 31 is provided on an upper surface of the matching portion 3, and is used for being slidably sleeved on the connecting rod 2, an exposure opening 321 is provided on a side portion of the observation portion 32, for reading a measurement value, a second scale mark is further provided at a position of the observation portion 32 corresponding to the exposure opening 321, reading the scale value through the exposure opening 321 is more intuitive and more accurate than reading the scale value at an uppermost end of the matching portion 3, in addition, by dividing the matching portion 3 into two parts, using the main body portion 31 for abutting against an upper surface of a workpiece, using the exposure opening 321 on the observation portion 32 to read the measurement value, the two can be prevented from being mutually influenced, the measurement accuracy is further improved, in addition, it is worth mentioning that the second scalable line can be used in combination with the first scalable line, a measurement mode similar to a vernier caliper is adopted, for example, the connecting rod 2 can be used as a main scale in the vernier caliper, the observation portion 32 can be used as a vernier, wherein the second scalable line can be set to be 9mm long and 10 equal divisions can be performed, the measurement accuracy value of the mode can reach 0.1mm, thus, when the matching portion 3 is slid, the integer scale of the first scalable line and the vernier scale of the second scalable line are read, the vernier scale is read in such a way that the scale value corresponding to the scale line aligned by overlapping the second scalable line and the first scalable line in the observation portion 32 is read, and the vernier scale value can be obtained by multiplying the scale value by the accuracy value, and adding the two scale values to obtain the measurement of the measured workpiece, and similarly, the second scale value can be set to be 19mm long and divided by 20, the measurement accuracy can be improved to 0.05mm, the second scale value can be set to be 49mm and divided by 50, and the measurement accuracy can be improved to 0.02mm.

In order to ensure that the fitting portion 3 can stably slide on the connecting rod 2 without shaking to cause measurement errors, in this embodiment, a mounting hole 34 is formed in the fitting portion 3 to slidably sleeve the fitting portion 3 on the connecting rod 2, a guide groove 21 extending along the extending direction of the connecting rod 2 is formed in the connecting rod 2, a guide protrusion 35 corresponding to the guide groove 21 is protruding on an inner side of the mounting hole 34, and the guide protrusion 35 is slidably mounted in the guide groove 21. Through the sliding fit of the guide convex part 35 and the guide groove 21, the matching part 3 can stably slide along the extending direction of the connecting rod 2, shake is not generated, measurement errors caused by the fact that the matching part 3 is not parallel to the detecting part 1 are avoided, and moreover, a first scale value can be arranged in the guide groove, so that the extending direction of the scale mark is consistent with the moving direction of the matching part 3, and the errors are reduced.

Further, considering that after the fitting portion 3 is located in the position where the detecting portion 1 clamps the workpiece to be measured up and down, the fitting portion 3 may be read around the axis direction of the connecting rod 2 for multiple times to improve measurement accuracy, in this embodiment, an installation groove is formed on the inner side wall of the installation hole 34, an elastic member is connected to the bottom of the installation groove, the guiding protrusion 35 is connected to the elastic member, when the fitting portion 3 rotates, the installation groove may provide a space for letting down for the elastic protrusion, and the elastic member may provide a restoring effect for the elastic protrusion, so as to restore when cooperating with the guiding groove 21, and continue to play a guiding role.

Specifically, considering that the detection portion 1 is too small to be difficult to extend into the hole to be detected when extending into the hole to be detected, in this embodiment, the detection portion 1 includes a body portion 12 and two clamping arms 13 formed on two sides of the yielding port 11, and each clamping arm 13 is hinged on the body portion 12, so that in the extending process, the clamping arms 13 can rotate around a hinge point to further provide a larger yielding space for the yielding port 11, so that the hole to be detected with different sizes can be adapted.

Specifically, considering that the hole to be detected is particularly small when the detecting portion 1 extends into the hole to be detected, when the clamping arm 13 is still not suitable for use by rotating, in this embodiment, the detecting device 100 for measuring the flatness of the circumference of the hole includes a detachable connection structure provided between the detecting portion 1 and the connecting rod 2, by which a suitable detecting portion 1 can be selected for flatness measurement. The solution to be described may be separate from the solution described above or may be provided simultaneously.

Further, a screw hole 4 is formed in the detecting portion 1 in a penetrating manner, threads 5 are formed on the periphery of the connecting end of the connecting rod 2, and the connecting rod 2 is connected with the threads 5 of the detecting portion 1; the detachable connecting structure comprises the screw hole 4 and the screw thread 5, and the screw thread 5 and the screw hole 4 are matched, so that the rigidity and the strength of a connecting piece connected with the screw hole are improved while the detachable connecting structure can be detached, and damage caused by overlarge force in the operation process is avoided.

Further, considering that the connecting rod 2 needs to be kept perpendicular to the pool of the detecting portion 1, in this embodiment, the detachable connection structure includes a first magnetic portion and a second magnetic portion, a connection groove is formed on the detecting portion 1, the first magnetic portion is installed on the connection groove, a second magnetic portion is installed on the connection end of the connecting rod 2, the first magnetic portion and the second magnetic portion are different in magnetism, connection installation can be achieved only by inserting the second magnetic portion of the connecting rod 2 into the first magnetic portion of the connection groove, and the connecting rod 2 and the detecting portion 1 can be ensured to be kept in a perpendicular state without rotating or the like.

Specifically, when the surface of the hole circle of the automobile workpiece is processed, not only the situation that the flatness effect is poor due to the local convex part, but also the situation that the hole circle is locally sunken is also present, in order to be able to simultaneously measure the flatness of the hole circle when the situation that the local concave part exists, in this embodiment, a plurality of detection convex parts with the same height are arranged at intervals towards the end face of the detection part 1 side of the matching part 3. By extending the detection protrusion into the partial depression to measure the flatness of the aperture peripheral ring, measurement errors when the partial depression exists are avoided, and a detection device 100 capable of accurately measuring the flatness under different conditions is provided.

In addition, referring to fig. 6, the present invention further provides a method for measuring flatness at a detection surface of a hole to be detected, wherein the hole to be detected further includes a back surface opposite to the detection surface, and the method comprises the following steps:

s10: the appropriate probe portion 1 is selected according to the size of the hole to be detected.

S20: the detection part 1 and the connecting rod 2 are assembled into a primary assembly, wherein a yielding port 11 is formed on the side part of the detection part 1.

S30: the primary assembly is transversely arranged in the hole to be detected, so that the two clamping arms 13 of the yielding port 11 are respectively arranged at two sides of the hole to be detected.

In this embodiment, reference may be made to step (1) in fig. 7.

S40: the connecting rod 2 is rotated in such a manner that the axis of the connecting rod 2 gradually approaches the axis of the hole to be detected, so that the detecting portion 1 moves from the detection surface side of the hole to be detected to the back surface side.

In this embodiment, reference may be made to steps (2), (3) and (4) in fig. 7.

S50: the matching part 3 is slidably sleeved on the connecting rod 2 and is positioned on one side of the detection surface to form a measurement structure, wherein the matching part 3 is provided with an exposure opening 321.

In this embodiment, reference may be made to steps (5) and (6) in fig. 7.

S60: the measuring structure is rotated to be stopped at different positions, so that the actual scale value correspondingly arranged on the connecting rod 2 is obtained through the exposing port 321.

In this embodiment, a suitable detecting portion 1 is selected according to the size of a hole to be detected, the suitable detecting portion 1 and connecting rod 2 are assembled into a primary assembly, wherein a yielding port 11 is formed on the side portion of the detecting portion 1, the primary assembly is transversely arranged in the hole to be detected, so that two clamping arms 13 of the yielding port 11 are respectively arranged at two sides of the hole to be detected, the connecting rod 2 is rotated in a manner that the axis of the connecting rod 2 gradually approaches the axis of the hole to be detected, so that the detecting portion 1 moves from the side of the detecting surface of the hole to be detected to the side of the back surface, a matching portion 3 is slidably sleeved on the connecting rod 2 and is positioned on the side of the detecting surface to form a measuring structure, the matching portion 3 is provided with a yielding port 321, the measured value can be read through the yielding port 321, in order to improve the accuracy of the measured value, the measuring structure can be rotated multiple times, so that the measured value can be obtained at different positions, the measuring structure is correspondingly arranged at the two sides of the connecting rod 2 in a manner that the axis of the yielding port 321 is gradually approaches the axis of the hole to be detected, then the measured value is stopped at the same level as the actual measured value, the measured value can be obtained, and the measured value can be measured value is obtained multiple times, and the average value is obtained, and the measured value is obtained by comparing the measured value with the average value obtained value in a known level, and the average value obtained value and the average value is obtained value.

The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the specification and drawings of the present invention or direct/indirect application in other related technical fields are included in the scope of the present invention.

Claims

1. A detection device for measuring flatness of a hole periphery, comprising:

2. The detecting device for measuring flatness of a hole circle according to claim 1, wherein the fitting portion includes a main body portion and an observation portion protruding from a middle portion of an upper surface of the main body portion, and a through hole penetrating the observation portion and the main body portion is provided on the upper surface of the fitting portion for sliding fit over the connecting rod;

3. The detecting device for measuring flatness of a hole circle according to claim 1, wherein the fitting portion is formed with a mounting hole for slidably fitting the fitting portion on the connecting rod, the connecting rod is formed with a guide groove extending in the extending direction of the connecting rod, a guide protrusion corresponding to the guide groove is provided on an inner side of the mounting hole, and the guide protrusion is slidably mounted in the guide groove.

4. The detecting device for measuring flatness of a hole circle as claimed in claim 3, wherein the inner side wall of the mounting hole is formed with a mounting groove, an elastic member is provided at the bottom of the mounting groove in connection, and the guide protrusion is connected with the elastic member.

5. The device for measuring flatness of a hole circle according to claim 1, wherein the detecting portion includes a body portion and two clamping arms formed at both sides of the relief opening, each of the clamping arms being hinged to the body portion.

6. The apparatus for measuring flatness of a hole circle according to claim 1, wherein the apparatus for measuring flatness of a hole circle includes a detachable connection structure provided between the detecting portion and the connecting rod.

7. The detecting device for measuring flatness of a hole circle according to claim 6, wherein a screw hole is formed through the detecting portion, a screw thread is formed on a circumferential side of a connecting end of the connecting rod, and the connecting rod is screw-coupled to the detecting portion;

8. The device for measuring flatness of a hole circle according to claim 6, wherein the detachable connection structure includes a first magnetic portion and a second magnetic portion, the detection portion is formed with a connection groove, the connection groove is provided with the first magnetic portion, the connection end of the connection rod is provided with the second magnetic portion, and the first magnetic portion and the second magnetic portion are different in magnetism.

9. The detecting device for measuring flatness of a hole circle according to claim 1, wherein the end face of the fitting portion facing the detecting portion side is provided with a plurality of detecting protrusions of the same height at intervals.

10. A method of measuring flatness for flatness measurement at a detection surface of a hole to be detected, the hole to be detected further comprising a back surface opposite to the detection surface, characterized in that the method comprises the steps of: