CN216205927U - Depth measuring device for inner concave hole - Google Patents
Depth measuring device for inner concave hole Download PDFInfo
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- CN216205927U CN216205927U CN202120194449.1U CN202120194449U CN216205927U CN 216205927 U CN216205927 U CN 216205927U CN 202120194449 U CN202120194449 U CN 202120194449U CN 216205927 U CN216205927 U CN 216205927U
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Abstract
The utility model discloses an inner concave hole depth measuring device, which is used for measuring whether the hole depth of an inner concave hole formed by the inward concave processing of an open end surface is qualified or not, and the depth measuring device comprises: the installation body is equipped with the locating surface on the installation body, and relative locating surface parallel and the last locating surface and the lower locating surface that the interval was laid, and the locating surface is used for laminating with the trompil terminal surface when measuring to fix a position the installation body. The installation body is internally provided with a measuring rod which is arranged in a sliding manner, the measuring end of the measuring rod extends out of the positioning surface, and the opposite marking end of the measuring rod extends out of the upper limiting surface and the lower limiting surface. The measuring end of measuring stick is used for inserting the hole bottom of inner groovy behind locating surface laminating trompil terminal surface, and the end of marking of measuring stick is used for after the measuring end inserts the hole bottom of inner groovy, marks the position of spacing face and lower limiting surface relatively on to when marking the end and being located between spacing face and the lower limiting surface, mark the hole depth of inner groovy qualified, otherwise, the hole depth of inner groovy is unqualified.
Description
Technical Field
The utility model relates to the field of hole depth measuring devices for parts with small holes, in particular to a concave hole depth measuring device.
Background
Taking the measurement of the part (rivet) shown in fig. 1 as an example, the current method for measuring the hole depth of the tapered small hole of the part to be 2.52 ± 0.1mm is as follows:
projection measurement of an imager: the part is needed to be cut in a half-section way, the part is placed under an imager for projection, a computer acquires points, and the distance between the leftmost end of the hole-type left end circular arc and the right end face of the part is the size of the hole depth.
And (3) measuring proofing paste: filling the sample paste into the pore cavity, and measuring the size of the sample paste by a conventional method after the sample paste is hardened to obtain the depth size of the pore.
And (3) measuring by using a height measuring instrument: and a second-stage special V-shaped block is required to be made, so that the parts are vertically and fixedly placed, and the depth dimension of the hole is measured by using a pointed probe.
And (3) measurement by an imager: high cost, low efficiency and high quality risk. Parts need to be cut, so that waste cost is caused; the computer is operated to take point measurement, which consumes long time; parts can only be checked by spot and cannot be measured by 100%, so that part of the parts cannot be measured and quality risks exist.
And (3) measuring proofing paste: long time consumption and inaccurate measurement. The measurement accuracy depends on the sample paste is not good, when the sample paste is not filled in the inner hole cavity, the sample paste taken out is inaccurate in measurement, and the waiting time of the whole measurement process is too long.
And (3) measuring by using a height measuring instrument: high cost and large measurement error. A secondary tool is needed to fix the parts, so that the manufacturing and management costs of the tool are increased; when the part is fixed, the part is required to be supported against one end face of the part, but the total length of the part has dimensional tolerance, so that the data error measured by the height gauge is large; to ensure accuracy, the reference plane needs to be realigned for each measurement, which is time-consuming and inefficient.
SUMMERY OF THE UTILITY MODEL
The utility model provides a device for measuring the depth of an inner concave hole, which aims to solve the technical problems of low detection efficiency, high manufacturing cost and large detection error in the conventional measuring mode.
The technical scheme adopted by the utility model is as follows:
an inner concave hole depth measuring device for measuring whether the hole depth of an inner concave hole formed by concave processing of a perforated end face is qualified or not, the depth measuring device comprising: the mounting body is provided with a positioning surface, an upper limiting surface and a lower limiting surface which are parallel to the positioning surface and are arranged at intervals, and the positioning surface is used for being attached to the end face of the opening during measurement so as to position the mounting body; a measuring rod is arranged in the mounting body in a sliding manner, the measuring end of the measuring rod extends out of the positioning surface, and the opposite marking end of the measuring rod extends out of the upper limiting surface and the lower limiting surface; the measuring end of measuring stick is used for inserting the hole bottom of inner groovy behind locating surface laminating trompil terminal surface, and the end of marking of measuring stick is used for after the measuring end inserts the hole bottom of inner groovy, marks the position of spacing face and lower limiting surface relatively on to when marking the end and being located between spacing face and the lower limiting surface, mark the hole depth of inner groovy qualified, otherwise, the hole depth of inner groovy is unqualified.
Furthermore, the positioning surface is a plane attached to the end surface of the opening; the upper limiting surface and the lower limiting surface are planes which are parallel to the positioning surface respectively; the mounting body is provided with a mounting channel for mounting the measuring rod, and the mounting channel is vertically communicated with the positioning surface, the lower limiting surface and the upper limiting surface; the measuring rod is arranged in the mounting channel in a sliding manner.
Furthermore, when the hole depth of the upper limiting surface, which is an inner concave hole, is the lower tolerance hole depth of the lower tolerance limit value of the tolerance, the lower tolerance plane is flush with the marking end of the measuring rod inserted into the hole bottom of the inner concave hole; and when the hole depth of the lower limiting surface, which is the concave hole, is the upper tolerance hole depth of the tolerance upper limit value, the upper tolerance plane is flush with the marking end of the measuring rod inserted into the hole bottom of the concave hole.
Further, the lower limit tolerance hole depth is designed by considering the safety margin from the actual lower limit hole depth of the inner concave hole; the upper limit tolerance hole depth is the upper limit tolerance safety hole depth designed by considering the safety margin from the actual upper limit hole depth of the inner concave hole.
Further, the mounting body is columnar; a positioning surface is formed on the lower end surface of the mounting body; an upper limiting surface and a lower limiting surface are formed on the upper end surface of the mounting body, and the upper limiting surface and the lower limiting surface are sequentially arranged along the axial direction and are arranged in half along the circumferential direction; the mounting channel extends through the mounting body along an axis.
Further, the measuring rod comprises a mounting section and a measuring head which are connected along the axial direction; the section of the mounting section is matched with the section of the mounting channel so as to guide the sliding of the measuring rod; the measuring head is matched with the concave hole.
Furthermore, the section of the installation channel is circular, and the section of the installation section is circular matched with the section of the installation channel; or the section of the installation channel is a polygon, and the section of the installation section is a polygon matched with the section of the installation channel.
Further, the depth measuring device further comprises a fixing pin for fixing the measuring rod in the mounting body when the depth measuring device is not in use.
Furthermore, a through hole communicated with the mounting channel is formed in the side wall of the mounting body; an inner concave groove is arranged on the wall surface of the measuring rod; the fixing pin penetrates through the through insertion hole and then is inserted into the inner groove, so that the measuring rod is fixed in the installation body.
Furthermore, the wall surface of the measuring rod is provided with marking points for marking positions; and the upper limiting surface or the lower limiting surface is provided with a reference point so as to mark the inner groove to align with the through-insertion hole after the mark point aligns with the reference point.
The utility model has the following beneficial effects:
the device for measuring the depth of the inner concave hole has the advantages of exquisite structure, simple and easy measurement operation, convenient assembly and disassembly, low manufacturing cost and good detection effect; parts are not required to be fixed by a special clamp, and parts are not required to be cut, so that the manufacturing cost is low, and the detection efficiency is high; no matter how complex the structure of the hole to be measured is, the depth of the hole to be measured can be measured as long as the position of the hole to be measured can be placed into the measuring device, and the measuring device has wide application range and good universality; the measurement is not limited by the space position, the measuring rod of the measuring device is manually inserted into the measured hole, and the mounting body is attached to the end face of the hole with the measured hole, so that whether the hole depth of the measured hole is qualified or not can be quickly judged, waiting time is not needed, and the verticality of parts is not needed to be guaranteed, so that the measuring efficiency is high, and the flexibility is good; the position of the measuring end plane of the measuring rod relative to the upper limiting surface and the lower limiting surface is visual and easy to judge, and errors are not easy to occur, so that the detection accuracy is high; the depth measuring device is used for multiple batches of products, is convenient to operate and high in accuracy, and the measuring efficiency is improved to 1 minute per piece from 5 minutes per piece in the prior art.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:
FIG. 1 is a schematic structural diagram of a part to be measured;
fig. 2 is a schematic sectional view of an inner recess depth measuring apparatus according to a preferred embodiment of the present invention.
Description of the figures
101. An opening end face; 102. an inner concave hole; 20. installing a body; 201. positioning the surface; 202. an upper limiting surface; 203. a lower limiting surface; 30. a measuring rod; 301. an inner groove; 40. and fixing the pin.
Detailed Description
The embodiments of the utility model will be described in detail below with reference to the accompanying drawings, but the utility model can be embodied in many different forms, which are defined and covered by the following description.
Referring to fig. 2, a preferred embodiment of the present invention provides an inner recess depth measuring apparatus for measuring whether a hole depth of an inner recess 102 formed by an inward recess process of an open end face 101 is acceptable, the depth measuring apparatus including: the installation body 20 is provided with a positioning surface 201, an upper positioning surface 202 and a lower positioning surface 203 which are parallel to the positioning surface 201 and arranged at intervals, and the positioning surface 201 is used for being attached to the opening end surface 101 during measurement so as to position the installation body 20. The mounting body 20 is provided with a sliding measuring rod 30, a measuring end of the measuring rod 30 extends out of the positioning surface 201, and an opposite marking end of the measuring rod 30 extends out of the upper limiting surface 202 and the lower limiting surface 203. The measuring end of the measuring rod 30 is used for being inserted into the hole bottom of the inner concave hole 102 after the positioning surface 201 is attached to the opening end surface 101, the marking end of the measuring rod 30 is used for marking the positions of the upper limiting surface 202 and the lower limiting surface 203 relatively after the measuring end is inserted into the hole bottom of the inner concave hole 102, so that when the marking end is located between the upper limiting surface 202 and the lower limiting surface 203, the hole depth of the inner concave hole 102 is qualified, and otherwise, the hole depth of the inner concave hole 102 is unqualified.
When the device for measuring the depth of the inner concave hole is used for measuring the depth of the inner concave hole 102 formed in the opening end face 101, the measuring rod 30 is firstly arranged in the installation body 20, then the positioning face 201 of the installation body 20 is attached to the opening end face 101 to limit the installation body 20, then the measuring rod 30 is slid to enable the measuring end of the measuring rod 30 to be inserted into the bottom of the inner concave hole 102, and finally the position of the marking end of the measuring rod 30 relative to the upper limiting face 202 and the lower limiting face 203 is observed, if the marking end of the measuring rod 30 is positioned between the upper limiting face 202 and the lower limiting face 203, the depth of the inner concave hole 102 is qualified, and if the marking end of the measuring rod 30 exceeds the upper limiting face 202 or is lower than the lower limiting face 203, the depth of the inner concave hole 102 is unqualified.
The device for measuring the depth of the inner concave hole has the advantages of exquisite structure, simple and easy measurement operation, convenient assembly and disassembly, low manufacturing cost and good detection effect; parts are not required to be fixed by a special clamp, and parts are not required to be cut, so that the manufacturing cost is low, and the detection efficiency is high; no matter how complex the structure of the hole to be measured is, the depth of the hole to be measured can be measured as long as the position of the hole to be measured can be placed into the measuring device, and the measuring device has wide application range and good universality; the measurement is not limited by the space position, the measuring rod of the measuring device is manually inserted into the measured hole, and the mounting body is attached to the end face of the hole with the measured hole, so that whether the hole depth of the measured hole is qualified or not can be quickly judged, waiting time is not needed, and the verticality of parts is not needed to be guaranteed, so that the measuring efficiency is high, and the flexibility is good; the position of the measuring end plane of the measuring rod relative to the upper limiting surface 202 and the lower limiting surface 203 is visual and easy to judge, errors are not easy to occur, and therefore the detection accuracy is high; the depth measuring device is used for multiple batches of products, is convenient to operate and high in accuracy, and the measuring efficiency is improved to 1 minute per piece from 5 minutes per piece in the prior art.
Optionally, as shown in fig. 2, the positioning surface 201 is a flat surface that is attached to the opening end surface 101. The upper and lower limiting surfaces 202 and 203 are planes parallel to the positioning surface 201. The mounting body 20 is provided with a mounting channel for mounting the measuring rod 30, and the mounting channel is vertically communicated with the positioning surface 201, the lower limiting surface 203 and the upper limiting surface 202. The measuring rod 30 is slidably mounted in the mounting channel. The measuring device for the depth of the inner concave hole is simple in measuring structure and easy to process and manufacture.
In this alternative, as shown in fig. 2, the upper limit surface 202 is a lower tolerance plane which is flush with the marked end of the measuring rod 30 inserted into the bottom of the inner recess 102 when the hole depth of the inner recess 102 is the lower tolerance hole depth of the lower tolerance value. The lower limit surface 203 is an upper tolerance plane which is flush with the marked end of the measuring rod 30 inserted into the bottom of the inner recess 102 when the hole depth of the inner recess 102 is the upper tolerance hole depth of the upper tolerance value. When the design is carried out, when the hole depth of the inner concave hole 102 is the lower tolerance hole depth of the lower tolerance limit value, the marking end of the measuring rod 30 inserted into the hole bottom of the inner concave hole 102 is flush with the upper limiting surface 202, so that the upper limiting surface 202 is a lower tolerance plane; similarly, when the hole depth of the inner recess 102 is the upper tolerance hole depth of the upper tolerance value, the marked end of the measuring rod 30 inserted into the bottom of the inner recess 102 is made flush with the lower limit surface 203, so that the lower limit surface 203 is the lower tolerance plane, and the distance between the upper tolerance plane and the lower tolerance plane is the tolerance range value allowed by the inner recess 102, so that when the marked end of the measuring rod 30 is located between the upper limit surface 202 and the lower limit surface 203, including the upper limit surface 202 or the lower limit surface 203, flush, it indicates that the hole depth of the inner recess 102 is within the allowed tolerance range, i.e., the hole depth of the inner recess 102 is acceptable, and if the marked end exceeds the upper limit surface 202 or is lower than the lower limit surface 203, it indicates that the hole depth of the inner recess 102 is not within the allowed tolerance range, and the hole depth of the inner recess 102 is unacceptable.
Preferably, the lower-limit-tolerance hole depth is a lower-limit-tolerance safety hole depth designed in consideration of a safety margin from the actual lower-limit hole depth of the inner recessed hole 102. The upper-limit-tolerance hole depth is an upper-limit-tolerance safety hole depth designed in consideration of a safety margin from the actual upper-limit hole depth of the inner recess 102. As shown in fig. 1, the inner concave hole 102 has a hole depth of 2.42mm to 2.62mm, and 2.42mm is an actual lower limit hole depth and 2.62mm is an actual upper limit hole depth. When in design, considering the safety margin, the design range of the measuring device is 2.44 mm-2.61 mm, 2.44mm is the lower limit tolerance safety hole depth, and 2.61mm is the upper limit tolerance safety hole depth. Two tolerance limit positions: when the lower limit tolerance hole is deep, the marking end of the measuring rod 30 is flush with the upper limiting surface 202, and the length of the measuring end of the measuring rod 30 extending out of the positioning surface 201 is 2.44 mm; when the upper limit tolerance hole is deep, the marking end of the measuring rod 30 is flush with the lower limit surface 203, and the length of the measuring end of the measuring rod 30 extending out of the locating surface 201 is 2.61 mm. When the lower limit tolerance hole depth and the upper limit tolerance hole depth are designed, the safety margin is considered, the influence of detection precision caused by manufacturing and processing errors of the measuring device can be reduced, and the detection precision of the measuring device is improved.
Alternatively, as shown in fig. 2, the mounting body 20 has a cylindrical shape. The lower end surface of the mounting body 20 forms a positioning surface 201. The upper end surface of the mounting body 20 forms an upper limiting surface 202 and a lower limiting surface 203, and the upper limiting surface 202 and the lower limiting surface 203 are sequentially arranged along the axial direction and are arranged in half along the circumferential direction. The mounting channel extends through the mounting body 20 along an axis. The measuring device for the depth of the inner concave hole has simple measuring structure and easy processing and preparation
In this alternative, the measuring rod 30 comprises a mounting section and a measuring head connected in axial direction, as shown in fig. 2. The cross-section of installation section sets up with the cross-section cooperation of installation passageway to slide to measuring stick 30 and lead, and effectively prevent measuring stick 30 and detect the skew of relative installation passageway when detecting, and then improve and detect the precision. The measuring head is matched with the inner concave hole 102, or the appearance of the measuring head is similar to that of the inner concave hole 102, but the size of the measuring head is smaller than that of the inner concave hole 102, so that the detection accuracy is further improved.
In the alternative, the cross section of the installation channel is circular, and the cross section of the installation section is circular matched with the cross section of the installation channel. Or the cross section of the installation channel is a polygon, and the cross section of the installation section is a polygon matched with the cross section of the installation channel, so that the measuring rod 30 can be effectively prevented from rotating relative to the installation channel, and the measuring precision and the installation convenience are improved.
Optionally, as shown in fig. 2, the depth measuring device further comprises a fixing pin 40, the fixing pin 40 being used to fix the measuring rod 30 in the mounting body 20 when the depth measuring device is not in use.
In this alternative, as shown in fig. 2, a through hole communicating with the mounting passage is formed in a side wall of the mounting body 20. The wall surface of the measuring rod 30 is provided with an inner concave groove 301. The fixing pin 40 penetrates through the insertion hole and then is inserted into the inner groove 301, so that the measuring rod 30 is fixed in the installation body 20, when the measuring device is not used, the measuring rod 30 slides out of the installation body 20, and the measuring rod 30 is prevented from being lost.
Preferably, the measuring rod 30 is provided with a marking point on a wall surface thereof for marking a position. The upper or lower limiting surface 202 or 203 is provided with a reference point to mark the inner groove 301 to be aligned with the insertion hole after the mark point is aligned with the reference point, so that the fixing pin 40 is smoothly inserted into the insertion hole and the inner groove 301.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An inner recess hole depth measuring device for measuring whether or not a hole depth of an inner recess hole (102) formed by an inwardly concave processing of an open end face (101) is acceptable, the depth measuring device comprising:
the mounting device comprises a mounting body (20), wherein a positioning surface (201), an upper limiting surface (202) and a lower limiting surface (203) which are parallel to the positioning surface (201) and arranged at intervals are arranged on the mounting body (20), and the positioning surface (201) is used for being attached to the opening end surface (101) during measurement so as to position the mounting body (20);
a measuring rod (30) which is arranged in a sliding manner is arranged in the mounting body (20), the measuring end of the measuring rod (30) extends out of the positioning surface (201), and the opposite marking end of the measuring rod (30) extends out of the upper limiting surface (202) and the lower limiting surface (203);
the measuring end of the measuring rod (30) is used for being inserted into the hole bottom of the inner concave hole (102) after the positioning surface (201) is attached to the opening end surface (101), the marking end of the measuring rod (30) is used for marking the positions relative to the upper limiting surface (202) and the lower limiting surface (203) after the measuring end is inserted into the hole bottom of the inner concave hole (102), so that when the marking end is located between the upper limiting surface (202) and the lower limiting surface (203), the hole depth of the inner concave hole (102) is marked to be qualified, otherwise, the hole depth of the inner concave hole (102) is not qualified.
2. The inner recess depth measuring device according to claim 1,
the positioning surface (201) is a plane attached to the opening end surface (101);
the upper limiting surface (202) and the lower limiting surface (203) are planes which are parallel to the positioning surface (201) respectively;
the mounting body (20) is provided with a mounting channel for mounting the measuring rod (30), and the mounting channel is vertically communicated with the positioning surface (201), the lower limiting surface (203) and the upper limiting surface (202);
the measuring rod (30) is arranged in the mounting channel in a sliding mode.
3. The inner recess depth measuring device according to claim 2,
when the hole depth of the inner concave hole (102) is the lower limit tolerance hole depth of the tolerance lower limit value, the upper limit surface (202) is a lower tolerance plane which is flush with the marking end of the measuring rod (30) inserted into the hole bottom of the inner concave hole (102);
when the hole depth of the inner concave hole (102) is the upper limit tolerance hole depth of the tolerance upper limit value, the lower limit surface (203) is an upper tolerance plane which is flush with the marking end of the measuring rod (30) inserted into the hole bottom of the inner concave hole (102).
4. An internal concave hole depth measuring device according to claim 3,
the lower limit tolerance hole depth is designed according to the actual lower limit hole depth of the inner concave hole (102) and considering a safety margin;
the upper tolerance hole depth is an upper tolerance safety hole depth designed with a safety margin taken into account by the actual upper tolerance hole depth of the inner recess (102).
5. The inner recess depth measuring device according to claim 2,
the mounting body (20) is columnar;
the lower end surface of the mounting body (20) forms the positioning surface (201);
the upper limiting surface (202) and the lower limiting surface (203) are formed on the upper end surface of the mounting body (20), and the upper limiting surface (202) and the lower limiting surface (203) are sequentially arranged along the axial direction and are arranged in half along the circumferential direction;
the mounting channel extends through the mounting body (20) along an axis.
6. The inner recess depth measuring device according to claim 5,
the measuring rod (30) comprises a mounting section and a measuring head which are connected along the axial direction;
the section of the mounting section is matched with the section of the mounting channel so as to guide the sliding of the measuring rod (30);
the measuring head is arranged in a matched manner with the concave hole (102).
7. The inner recess depth measuring device according to claim 6,
the section of the mounting channel is circular, and the section of the mounting section is circular matched with the section of the mounting channel; or
The cross section of the installation channel is a polygon, and the cross section of the installation section is a polygon matched with the cross section of the installation channel.
8. The inner recess depth measuring device according to claim 2,
the depth measuring device further comprises a fixing pin (40), the fixing pin (40) being used for fixing the measuring rod (30) in the mounting body (20) when the depth measuring device is not in use.
9. The inner recess hole depth measuring device according to claim 8,
the side wall of the mounting body (20) is provided with a through hole communicated with the mounting channel;
an inner concave groove (301) is formed in the wall surface of the measuring rod (30);
the fixing pin (40) penetrates through the penetrating hole and then is inserted into the inner groove (301) so as to fix the measuring rod (30) in the installation body (20).
10. The inner recess depth measuring device according to claim 9,
marking points for marking positions are arranged on the wall surface of the measuring rod (30);
and a reference point is arranged on the upper limiting surface (202) or the lower limiting surface (203), so that the inner groove (301) is marked to be aligned with the through-inserting hole after the marking point is aligned with the reference point.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120194449.1U CN216205927U (en) | 2021-01-25 | 2021-01-25 | Depth measuring device for inner concave hole |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120194449.1U CN216205927U (en) | 2021-01-25 | 2021-01-25 | Depth measuring device for inner concave hole |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112964154A (en) * | 2021-02-09 | 2021-06-15 | 中国航发哈尔滨东安发动机有限公司 | Space distance detection measuring tool and method |
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2021
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112964154A (en) * | 2021-02-09 | 2021-06-15 | 中国航发哈尔滨东安发动机有限公司 | Space distance detection measuring tool and method |
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Address after: 412000 No. 1018, Hangfei Avenue, Lusong District, Zhuzhou City, Hunan Province Patentee after: Hunan Xingtu Aerospace and Spacecraft Manufacturing Co.,Ltd. Address before: Dong Jiaduan 412002 in Hunan province Zhuzhou city Lusong District Patentee before: AVIC POWER ZHUZHOU AVIATION PARTS MANUFACTURING Co.,Ltd. |
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