CN113834412B - Symmetry gauge and method for detecting symmetry of key groove - Google Patents
Symmetry gauge and method for detecting symmetry of key groove Download PDFInfo
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- CN113834412B CN113834412B CN202010511998.7A CN202010511998A CN113834412B CN 113834412 B CN113834412 B CN 113834412B CN 202010511998 A CN202010511998 A CN 202010511998A CN 113834412 B CN113834412 B CN 113834412B
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 152
- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 238000005259 measurement Methods 0.000 claims description 7
- 238000012360 testing method Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000105 evaporative light scattering detection Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B5/25—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention relates to a symmetry degree gauge, relates to the technical field of gauges, and solves the technical problems that in the prior art, the symmetry degree detection efficiency of a key slot is low, the detection is not suitable for batch detection, the labor intensity of operators is high, and the detection accuracy is low. The technical characteristics include a bottom plate, the lower part of which is provided with leveling feet; the detection mechanism is fixedly arranged above the bottom plate; the detection mechanism comprises a detection rod, the detection end of the detection rod is provided with two sections of same Archimedes spiral arcs which are symmetrically arranged, and the Archimedes spiral arcs are inserted into key grooves of the detected piece and used for detecting the symmetry degree of the key grooves. The method has the advantages of simple whole detection process, convenient operation, improved detection efficiency and accuracy, low labor intensity of operators and suitability for batch detection.
Description
Technical Field
The invention relates to the technical field of detectors, in particular to a symmetry detector and a method for detecting symmetry of a key slot.
Background
Symmetry refers to the axis of the machined dimension that must lie within the tolerance value required for Symmetry and between two parallel planes symmetrical with respect to an auxiliary plane passing through the reference axis, subject to positional tolerances.
Shaft diameter keyway applications are common, and almost all movement and torque transfer is accomplished by it, such as: the industries of motors, generators, gas turbines, automobiles, trains, ships and the like are not in existence, so that the measurement of the symmetry degree of the shaft diameter is not only a common and common measurement, but also a measurement which is time-consuming and labor-consuming, or is measured by adopting three-coordinate equipment, and the summary of the measurement method of the symmetry degree of the shaft diameter is carried out under the condition of no three coordinates,
In the mass shaft diameter key slot processing production, the traditional symmetry degree measuring method has two kinds, firstly, the shaft is placed in the V-shaped surface by utilizing the symmetry characteristics of the V-shaped surface and the two side surfaces of the V-shaped iron at 90 degrees on a flat plate, then the side surfaces are positioned, the side surfaces of the shaft diameter key slot are parallel to the side surfaces of the V-shaped iron by using a dial indicator, the other side surfaces are positioned by turning over 180 degrees, the other side surfaces of the shaft diameter key slot are measured by using the dial indicator, the reading difference of the dial indicator is the symmetry degree value, and therefore, the measuring mode has lower efficiency, is not suitable for mass detection, has high labor intensity of operators and has low detection accuracy.
Disclosure of Invention
The invention provides a symmetry degree gauge and a method for detecting the symmetry degree of a key groove, which are used for solving the technical problems that the symmetry degree detection efficiency of the key groove is low, the detection is not suitable for batch detection, the labor intensity of operators is high, and the detection accuracy is low in the prior art.
In order to solve the technical problems, the technical scheme of the invention is as follows:
A symmetry gauge, comprising:
The lower part of the bottom plate is provided with leveling feet;
the detection mechanism is fixedly arranged above the bottom plate;
the detection mechanism comprises a detection rod, wherein the front end of the detection rod is a detection end, and the detection end is inserted into a key slot of a detected piece and is used for positioning and detecting the symmetry degree of the key slot;
The center of the key slot of the detected piece coincides with the center of the detection rod, and the cross section of the detection end at the front end of the detection rod is composed of six symmetrical lines: the two straight lines, the two circular arc lines and the two Archimedes spiral lines are symmetrically distributed along the central axis of the detection rod, two radiuses of any section passing through the axis of the detection rod are equal, the minimum diameter size is that the two straight lines pass through the axis and intersect, the maximum diameter size is that the two straight lines pass through the axis and intersect with the two circular arcs, and the excessive size between the straight lines and the circular arcs is realized by the Archimedes spiral lines;
the distance between the two straight lines is smaller than the size of two sides of the key groove of the detected piece;
the distance between the two sections of arc lines and the two sections of Archimedes spiral lines is larger than the size of two sides of a key groove of the detected piece;
When the size of the key slot of the detected piece is qualified, the detection end of the detection rod is inserted into the key slot and rotates the detection rod, and two sections of arc lines or two sections of Archimedes spiral lines are simultaneously attached to two sides of the key slot;
When the size of the key slot of the detected piece is unqualified, the detection end of the detection rod is inserted into the key slot and rotates the detection rod, and two sections of arc lines or two sections of Archimedes spiral lines are not attached to two sides of the key slot at the same time.
Further, the detection mechanism includes:
The detection rod seat is fixedly arranged on one side above the bottom plate, the detection rod is rotationally connected with the detection rod seat through a linear bearing, one end of the detection rod, which is close to a detected piece, is a detection end, and the other end of the detection rod is a manual end;
the positioning seat is arranged on one side of the detection rod seat and fixedly arranged above the bottom plate, and a detected piece is placed on the positioning seat;
The sliding table is arranged above the bottom plate through a linear guide rail and moves linearly along the linear guide rail towards or away from the detected piece;
The sliding table is fixedly provided with a dial indicator, the sliding table is provided with a swinging rod, the swinging rod is rotationally connected with the sliding table through a rotating shaft, one end of the swinging rod is a V-shaped groove, the center of the V-shaped groove is coplanar with the center of the detection rod, the other end of the swinging rod is a step rod, the step surface of the step rod is coplanar with the center of the V-shaped groove, and the step rod is vertically attached to a measuring head of the dial indicator;
During measurement, the V-shaped groove is attached to the circumferential surface of the detected piece, and the distance A from the center of the detected piece to the rotating shaft is equal to the distance B from the measuring head of the dial indicator to the rotating shaft;
When the size of the key slot of the detected piece is unqualified, the detecting end of the detecting rod is inserted into the key slot and rotates the detecting rod, two sections of arc lines or two sections of Archimedes spiral lines are not attached to two sides of the key slot at the same time, the detected piece acts on one side of the V-shaped groove at one end of the swinging rod, the swinging rod acts on the measuring head of the dial indicator, and the double of the reading of the dial indicator is symmetry.
Further, the V-shaped groove is 90-degree V-shaped.
Further, the method for detecting the symmetry degree of the key slot by the gauge specifically comprises the following steps:
Firstly, placing a detected piece on a positioning seat, pushing a sliding table, enabling a V-shaped groove at one end of a swinging rod on the sliding table to be attached to the circumferential surface of the detected piece, and keeping the sliding table motionless;
Pushing the detection rod to enable a detection end at one end of the detection rod to be inserted into a key groove on a detected piece, rotating the detection rod, and enabling the detected piece to drive the swing rod to swing by taking the rotating shaft as a circle center if two side faces of the key groove are asymmetric and two sections of arc lines or two sections of Archimedes lines are not attached to two sides of the key groove at the same time;
And thirdly, the measuring head of the dial indicator contacts with the other end of the swing rod and displays a numerical value, and the double of the numerical value is the symmetry degree of the key slot.
The invention has the following beneficial effects:
The symmetry degree detection tool provided by the invention has the advantages that the detection end of the detection rod consists of two straight lines, two circular arc lines and two Archimedes spiral lines, the detection end of the detection rod is inserted into the key slot of a detected piece, the center of the key slot can be coincided with the center of the detection rod, if the two sides of the key slot are asymmetric, the center of the detected piece is deviated from the center of the detection rod, namely, the center of the key slot is deviated, only one Archimedes spiral line or one circular arc contacts one side, the detected piece is further moved, the detected piece moves to drive the swing rod to rotate, the deviation is detected through the dial indicator, the numerical value is read, and the double of the numerical value is the symmetry degree, so that the whole detection process is simple, the operation is convenient, the detection efficiency and accuracy are improved, the labor intensity of operators is low, and the symmetry degree detection tool is suitable for batch detection.
Drawings
The invention is described in further detail below with reference to the drawings and the detailed description.
FIG. 1 is a schematic diagram of a symmetry gauge according to the present invention;
FIG. 2 is a schematic top view of a symmetry gauge according to the present invention;
Fig. 3 is a schematic cross-sectional view of a detecting end of a detecting rod of the symmetry detecting tool according to the present invention.
Reference numerals in the drawings denote:
1. A bottom plate; 2. a detection rod seat; 3. a detection rod; 4. a member to be detected; 5. a positioning seat; 6. swing rod; 7. a rotating shaft; 8. a sliding table; 9. a dial indicator; 10. a linear guide rail; 11. leveling the ground feet.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. 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.
Referring to fig. 1-3, a symmetry gauge includes:
the bottom plate 1, the lower part of the bottom plate 1 is provided with leveling feet 11;
the detection mechanism is fixedly arranged above the bottom plate 1;
the detection mechanism comprises a detection rod 3, wherein the front end of the detection rod 3 is a detection end, and the detection end is inserted into a key slot of a detected piece 4 and is used for positioning and detecting the symmetry degree of the key slot;
The cross section of the detection end at the front end of the detection rod 3 is composed of six symmetrical lines: the two straight lines, the two circular arc lines and the two Archimedes spiral lines are symmetrically distributed along the central axis of the detection rod 3, two radiuses of any section passing through the axis of the detection rod 3 are equal, the minimum diameter size is that the two straight lines pass through the axis and intersect, the maximum diameter size is that the two straight lines pass through the axis and intersect with the two circular arcs, and the size transition between the straight lines and the circular arcs is realized by the Archimedes spiral line;
the distance between the two straight lines is smaller than the size of the two sides of the key slot of the detected piece 4;
The distance between the two sections of arc lines and the two sections of Archimedes spiral lines is larger than the size of the two sides of the key slot of the detected piece 4;
When the size of the key slot of the detected piece 4 is qualified, the detection end of the detection rod 3 is inserted into the key slot and the detection rod 3 is rotated, and two sections of arc lines or two sections of Archimedes spiral lines are simultaneously attached to two sides of the key slot;
when the size of the key slot of the detected piece 4 is unqualified, the detecting end of the detecting rod 3 is inserted into the key slot and rotates the detecting rod 3, and two sections of arc lines or two sections of Archimedes spiral lines are not attached to two sides of the key slot at the same time.
Working principle: the centers of the key grooves of the detected piece 4 and the detected piece 4 are overlapped in theory, but the actual production condition is that the center of the detected piece 4 and the center of the key groove of the detected piece 4 are not overlapped, so that the symmetry degree of the key groove needs to be detected, and the cross section of the detection end at the front end of the detection rod 3 is composed of six symmetrical lines: the straight line, the circular arc line and the Archimedes spiral line are symmetrically distributed along the axial line of the detection rod 3, namely, the radius of any section passing through the axial center is equal, the minimum dimension is the distance dimension between two surfaces, namely the dimension of the through end of the key slot plug gauge, the diameter dimension of two sections of circular arcs with the maximum dimension, and the excess dimension between the straight line and the circular arcs is realized by the Archimedes spiral line, so that the detection rod 3 is inserted into the key slot and the detection rod 3 is rotated on the premise that the product dimension is qualified, the diameter dimension is equal to the key slot dimension, and the positions of the detection rod 3 are equal to the key slot dimension, so that the center of the detection rod 3 is coincident with the center of the key slot; if the two sides of the key slot are asymmetric, that is, the center of the key slot is deviated from the center of the detected piece 4, because the center of the detected piece 4 is coplanar with the center of the detecting rod 3, only one archimedes spiral line or one circular arc firstly contacts one side of the key slot and then contacts the other key slot side, the process can lead the detected piece 4 to move, and the key slot asymmetry of the detected piece 4 can be detected through the detecting mechanism.
The distance between the two straight lines is smaller than the size of the two sides of the key slot of the detected piece 4, namely the size of the detection plug gauge, so that the detection end of the detection rod 3 can be ensured to be smoothly inserted into the key slot of the detected piece 4; the distance between the two sections of arc lines and the two sections of Archimedes spiral lines is larger than the size of the two sides of the key slot of the detected piece 4, so that when the detecting rod 3 is rotated, the arc or the Archimedes spiral lines can be ensured to contact with the two sides of the key slot;
Firstly, placing a detected piece 4 in a detection mechanism, inserting a detection end at one end of a detection rod 3 into a key groove of the detected piece 4, rotating the detection rod 3, and if two sides of the key groove are asymmetric, namely the center of the key groove is deviated from the center of the detected piece 4, as the center of the detected piece 4 is coplanar with the center of the detection rod 3, only one Archimedean spiral line or one circular arc firstly contacts one side surface of the key groove and then contacts the other key groove side surface, wherein the process can lead the detected piece 4 to move, and the asymmetry of the key groove of the detected piece 4 can be detected through the detection mechanism; if the key slot is qualified in size, the detection rod 3 is inserted into the key slot and the detection rod 3 is rotated, the diameter size of the detection rod is equal to the key slot size, the detection rod 3 is equal to the key slot size, the center of the detection rod 3, the center of the key slot and the center of the detected piece 4 are ensured to be coincident, the detected piece 4 does not move, and the detection mechanism does not act; the leveling foundation 11 can ensure that the bottom plate 1 is in a horizontal state, and meanwhile, the Archimedes spiral line or the circular arc is in smooth contact with the side surface of the key groove, so that the detection rod 3 can be separated from the key groove when the detection rod 3 is twisted in the opposite direction, and the surface of the key groove cannot be damaged.
The detection mechanism comprises:
The detection rod seat 2 is fixedly arranged on one side above the bottom plate 1, the detection rod 3 is rotationally connected with the detection rod seat 2 through a linear bearing, one end of the detection rod 3, which is close to the detected piece 4, is a detection end, and the other end of the detection rod 3 is a manual end;
The positioning seat 5 is arranged on one side of the detection rod seat 2 and fixedly arranged above the bottom plate 1, and a detected piece 4 is placed on the positioning seat 5;
The sliding table 8 is arranged above the bottom plate 1 through a linear guide rail 10, and the sliding table 8 moves linearly along the linear guide rail 10 towards or away from the detected piece 4;
The sliding table 8 is fixedly provided with a dial indicator 9, the sliding table 8 is provided with a swinging rod 6, the swinging rod 6 is rotationally connected with the sliding table 8 through a rotating shaft 7, one end of the swinging rod 6 is a V-shaped groove, the center of the V-shaped groove is coplanar with the center of the detection rod 3, the other end of the swinging rod 6 is a step rod, the step surface of the step rod is coplanar with the center of the V-shaped groove, and the step rod is vertically attached to the measuring head of the dial indicator 9;
during measurement, the V-shaped groove is attached to the circumferential surface of the detected piece 4, and the distance A from the center of the detected piece 4 to the rotating shaft 7 is equal to the distance B from the measuring head of the dial indicator 9 to the rotating shaft 7;
when the size of the key slot of the detected piece 4 is unqualified, the detecting end of the detecting rod 3 is inserted into the key slot and rotates the detecting rod 3, two sections of circular arc lines or two sections of Archimedes spiral lines are attached to two sides of the key slot at different time, the detected piece 4 applies force to one side of the V-shaped groove at one end of the swinging rod 6, the swinging rod 6 applies force to the measuring head of the dial indicator 9, and the double of the reading of the dial indicator 9 is symmetry.
Working principle: placing the detected piece 4 on the positioning seat 5, attaching the dial indicator 9 to the step bar at the other end of the swing rod 6, and clearing the dial indicator 9, so that whether the swing rod 6 rotates clockwise or anticlockwise, the swing rod 6 is attached to the measuring head of the dial indicator 9, displaying a numerical value, guaranteeing the measurement precision, pushing the sliding table 8 to move towards the detected piece 4, attaching the V-shaped groove at one end of the swing rod 6 to the detected piece 4, keeping the sliding table 8 motionless, at the moment, inserting the detection end at one end of the detection rod 3 into the key slot of the detected piece 4, rotating the manual end of the detection piece 3, attaching two arc lines or two Archimedes spiral lines to two sides of the key slot, ensuring that the center of the detection rod 3 is coplanar with the center of the detected piece 4, if the key slot is qualified, the detection rod 3 is inserted into the key slot and the detection rod 3 is rotated, the diameter of the detection rod 3 is equal to the size of the key slot, the equal positioning ensures that the center of the detection rod 3, the center of the key slot and the center of the detected piece 4 are coincident, thus the detected piece 4 does not apply force to the V-shaped groove, namely, the detected piece 4 does not apply force to the swinging rod 6, the swinging rod 6 does not move, the dial indicator 9 does not have readings, if the two sides of the key slot are asymmetric, namely, the center of the key slot and the center of the detected piece 4 deviate, only one Archimedes spiral line or one circular arc firstly contacts one side of the key slot and then contacts with the other side of the key slot, the process can enable the detected piece 4 to move, the detected piece 4 applies force to the V-shaped groove, namely, the swinging rod 6, the swinging rod 6 rotates around the rotating shaft 7, the swinging rod 6 acts on the measuring head of the dial indicator 9, the dial indicator 9 displays a reading, because the distance A from the center of the detected piece 4 to the rotating shaft 7 is equal to the distance B from the measuring head of the dial indicator 9 to the rotating shaft 7, the step surface of the step rod is coplanar with the center of the V-shaped groove, as shown in fig. 2, the deviation of the center of the detected piece 4 and the center of the detecting rod 3 is displayed on the dial indicator 9 by one-to-one ratio according to the lever principle, and the two times of the numerical value of the dial indicator 9 is the symmetry. Of course, no matter how the swing rod 6 rotates, the dial indicator 9 can display corresponding values, namely symmetry, the whole process is simple and easy, the labor intensity of operators is low, the efficiency is high, the precision is high, and the device is suitable for occasions of batch detection.
The V-shaped groove is 90-degree V-shaped.
Working principle: the 90-degree V-shaped device can furthest remove the side surface of the detected piece 4, and meanwhile, the detected piece 4 can better apply force to the V-shaped groove, so that the swing rod 6 can be guaranteed to normally rotate, and finally, the test result is guaranteed; the situation that the detected piece 4 and the V-shaped groove slide is avoided.
The method for detecting the symmetry of the key slot by the gauge specifically comprises the following steps:
Firstly, placing a detected piece 4 on a positioning seat 5, pushing a sliding table 8, enabling a V-shaped groove at one end of a swinging rod 6 on the sliding table 8 to be attached to the circumferential surface of the detected piece 4, and keeping the sliding table 8 motionless;
Secondly, pushing the detection rod 3 to enable a detection end at one end of the detection rod 3 to be inserted into a key groove on a detected piece, rotating the detection rod 3, and at the moment, if two side faces of the key groove are asymmetric, two sections of arc lines or two sections of Archimedes lines are not attached to two sides of the key groove at the same time, the detection rod 3 can drive the detected piece 4 to move, and the detected piece 4 drives the swing rod 6 to swing by taking the rotating shaft 7 as a circle center;
And thirdly, the measuring head of the dial indicator 9 contacts with the other end of the swing rod 6 and displays a numerical value, and the double of the numerical value is the symmetry degree of the key slot.
Working principle: the whole process is simple to operate, the labor intensity of operators is low, and the method is suitable for occasions of batch detection.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (3)
1. Symmetry gauge, characterized by comprising:
The leveling device comprises a bottom plate (1), wherein leveling feet (11) are arranged at the lower part of the bottom plate (1);
the detection mechanism is fixedly arranged above the bottom plate (1);
The detection mechanism comprises a detection rod (3), wherein the front end of the detection rod (3) is a detection end, and the detection end is inserted into a key slot of a detected piece (4) and is used for positioning and detecting the symmetry degree of the key slot;
The cross section of the detection end at the front end of the detection rod (3) is composed of six symmetrical sections of three lines: the device comprises two straight lines, two circular arc lines and two Archimedes spiral lines, wherein the two straight lines, the two circular arc lines and the two Archimedes spiral lines are symmetrically distributed along the central axis of a detection rod (3), two radiuses of any section passing through the axis of the detection rod (3) are equal, the minimum diameter size is that the two straight lines pass through the axis and intersect with the two straight lines, the maximum diameter size is that the two straight lines pass through the axis and intersect with the two circular arcs, and the excessive size between the straight lines and the circular arcs is realized by the Archimedes spiral lines;
the distance between the two sections of straight lines is smaller than the size of two sides of a key groove of the detected piece (4);
The distance between the two sections of arc lines and the two sections of Archimedes spiral lines is larger than the size of two sides of a key groove of the detected piece (4);
When the size of a key slot of the detected piece (4) is qualified, the detection end of the detection rod (3) is inserted into the key slot and rotates the detection rod (3), two sections of arc lines or two sections of Archimedes spiral lines are simultaneously attached to two sides of the key slot, and the Archimedes spiral lines or the arc lines are in smooth contact with the side surfaces of the key slot;
When the size of a key slot of the detected piece (4) is unqualified, the detection end of the detection rod (3) is inserted into the key slot and rotates the detection rod (3), two sections of arc lines or two sections of Archimedes spiral lines are not attached to two sides of the key slot at the same time, and only one Archimedes spiral line or one arc is contacted with one side surface of the key slot at first to be in smooth contact;
the detection mechanism includes:
the detection rod seat (2), the detection rod seat (2) is fixedly arranged on one side above the bottom plate (1), the detection rod (3) is rotationally connected with the detection rod seat (2) through a linear bearing, one end of the detection rod (3) close to the detected piece (4) is a detection end, and the other end of the detection rod (3) is a manual end;
The positioning seat (5) is arranged on one side of the detection rod seat (2) and fixedly arranged above the bottom plate (1), and a detected piece (4) is placed on the positioning seat (5);
the sliding table (8) is arranged above the bottom plate (1) through a linear guide rail (10), and the sliding table (8) moves linearly along the linear guide rail (10) towards or away from the detected piece (4);
The device comprises a sliding table (8), a dial indicator (9) is fixedly arranged on the sliding table (8), a swinging rod (6) is arranged on the sliding table (8), the swinging rod (6) is rotationally connected with the sliding table (8) through a rotating shaft (7), one end of the swinging rod (6) is a V-shaped groove, the center of the V-shaped groove is coplanar with the center of a detection rod (3), the other end of the swinging rod (6) is a stepped rod, the step surface of the stepped rod is coplanar with the center of the V-shaped groove, and the stepped rod is vertically attached to a measuring head of the dial indicator (9);
during measurement, the V-shaped groove is attached to the circumferential surface of the detected piece (4), and the distance A from the center of the detected piece (4) to the rotating shaft (7) is equal to the distance B from the measuring head of the dial indicator (9) to the rotating shaft (7);
When the size of the key slot of the detected piece (4) is unqualified, two sections of arc lines or two sections of Archimedes spiral lines are not attached to two sides of the key slot at the same time, and the double of the reading of the dial indicator (9) is the symmetry degree.
2. The symmetry-testing device according to claim 1, wherein the V-shaped slot is a90 degree V-shape.
3. The symmetry gauge as claimed in claim 2, wherein the method for detecting the symmetry of the key slot comprises the following steps:
Firstly, placing the detected piece (4) on a positioning seat (5), pushing a sliding table (8), enabling a V-shaped groove at one end of a swinging rod (6) on the sliding table (8) to be attached to the circumferential surface of the detected piece (4), and keeping the sliding table (8) motionless;
secondly, pushing the detection rod (3) to enable a detection end at one end of the detection rod (3) to be inserted into a key slot on a detected piece (4), rotating the detection rod (3), wherein if two side faces of the key slot are asymmetric, two sections of arc lines or two sections of Archimedes lines are not simultaneously attached to two sides of the key slot, the detection rod (3) can drive the detected piece (4) to move, and the detected piece (4) drives the swing rod (6) to swing by taking the rotating shaft (7) as a circle center;
and thirdly, the measuring head of the dial indicator (9) is contacted with the other end of the swing rod (6) and displays a numerical value, and the double of the numerical value is the symmetry degree of the key slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010511998.7A CN113834412B (en) | 2020-06-08 | 2020-06-08 | Symmetry gauge and method for detecting symmetry of key groove |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010511998.7A CN113834412B (en) | 2020-06-08 | 2020-06-08 | Symmetry gauge and method for detecting symmetry of key groove |
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| CN113834412A CN113834412A (en) | 2021-12-24 |
| CN113834412B true CN113834412B (en) | 2024-06-28 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211954007U (en) * | 2020-06-08 | 2020-11-17 | 长春市春求科技开发有限公司 | Symmetry degree detection tool |
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|---|---|---|---|---|
| US4658262A (en) * | 1985-02-19 | 1987-04-14 | Duhamel Raymond H | Dual polarized sinuous antennas |
| SU1525430A1 (en) * | 1987-09-18 | 1989-11-30 | В. А. Озерский | Device for measuring symmetry of shaft key slot |
| SU1504481A1 (en) * | 1988-01-14 | 1989-08-30 | Всесоюзный Проектно-Конструкторский Институт Технологии Электротехнического Производства | Measure for checking devices for monitoring deviation from symmetry and parallelism of keyways on outer surface of cylindrical parts |
| CN2047778U (en) * | 1989-05-24 | 1989-11-15 | 哈尔滨量具刃具厂科学技术协会 | Symmetry measuring instrument for keyseat on a shaft |
| RU2253086C1 (en) * | 2004-02-03 | 2005-05-27 | Тверской государственный технический университет | Arrangement for measuring of the veener groove parameters of an opening |
| CN201672902U (en) * | 2010-05-08 | 2010-12-15 | 湖北威风汽车配件股份有限公司 | Rapid and convenient camshaft keyway symmetry detector |
| CN206573062U (en) * | 2017-03-24 | 2017-10-20 | 广州雅新金属制品有限公司 | The measurement apparatus of workpiece symmetry |
| JP2019015705A (en) * | 2017-07-11 | 2019-01-31 | 長野精工株式会社 | Key groove symmetry degree measurement device, tuning method of key groove symmetry degree measurement device, and measurement method of symmetry degree of key groove by key groove symmetry degree measurement device |
| CN111121600A (en) * | 2019-12-31 | 2020-05-08 | 广德锦汭轴承有限公司 | Detection tool for detecting diameter of auxiliary screw nut raceway of ball screw for automobile |
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2020
- 2020-06-08 CN CN202010511998.7A patent/CN113834412B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211954007U (en) * | 2020-06-08 | 2020-11-17 | 长春市春求科技开发有限公司 | Symmetry degree detection tool |
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