CN114754653B - Device and method for measuring diameter of circular tube product by cross method - Google Patents

Device and method for measuring diameter of circular tube product by cross method Download PDF

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Publication number
CN114754653B
CN114754653B CN202210540193.4A CN202210540193A CN114754653B CN 114754653 B CN114754653 B CN 114754653B CN 202210540193 A CN202210540193 A CN 202210540193A CN 114754653 B CN114754653 B CN 114754653B
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measuring
probe
product
tolerance
positioning
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CN114754653A (en
Inventor
冯金邻
柯连运
刘文成
梅华
戴慧君
杨翰辰
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Baolong Anhui Auto Parts Co ltd
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Baolong Anhui Auto Parts Co ltd
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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
    • G01B5/08—Measuring arrangements characterised by the use of mechanical techniques for measuring diameters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/04—Sorting according to size
    • 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
    • G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
    • G01B5/06—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness for measuring thickness
    • G01B5/061—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness for measuring thickness height gauges
    • 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
    • G01B5/08—Measuring arrangements characterised by the use of mechanical techniques for measuring diameters
    • G01B5/12—Measuring arrangements characterised by the use of mechanical techniques for measuring diameters internal diameters

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)

Abstract

The invention discloses a device for measuring diameter of a circular tube product by a cross method, which comprises a workbench, a base, a plurality of measuring assemblies, a plurality of tolerance probe assemblies, a positioning column and a positioning assembly, wherein the workbench is provided with a plurality of measuring assemblies; the positioning column is connected with the base, and the positioning assembly comprises a positioning slide bar capable of moving along the radial direction; at least two measuring components are arranged perpendicular to each other, and the measuring components are connected with the workbench; the measuring assembly comprises a measuring slide bar and a swinging rod, the measuring slide bar can move along the radial direction, the measuring slide bar comprises at least two measuring blocks, the middle part of the swinging rod is hinged with the base, one end of the swinging rod is movably connected with the measuring slide bar, and the other end of the swinging rod extends to the side face of the tolerance probe assembly; the tolerance probe assembly includes an upper tolerance probe and a lower tolerance probe arranged in parallel in a horizontal plane. The invention also discloses a method for measuring the diameter of the round tube product by the cross method. The invention has the beneficial effects that: automatic continuous production is realized, products are picked and placed through a robot, and qualified pieces and unqualified pieces are separated and placed, so that the efficiency is greatly improved.

Description

Device and method for measuring diameter of circular tube product by cross method
Technical Field
The invention relates to the technical field of product size measurement, in particular to a device and a method for measuring the size of a circular tube product.
Background
The existing circular tube products, such as tail pipes and the like, detect and confirm whether the products are qualified or not, usually measure critical dimensions (inner diameter, outer diameter and height), at present, the inner diameter of the circular tube is mostly measured by a vernier caliper by a cross method, and after measuring data is compared with a target value, the qualified products and unqualified products are distinguished, so that the problems of large error and low efficiency exist in manual reading.
Chinese patent document CN212363051U discloses a pipe fitting internal diameter roundness tolerance gauge, including the screw thread section of thick bamboo, screw thread section of thick bamboo inside wall threaded connection has two threaded rods, screw thread section of thick bamboo lateral wall fixedly connected with install bin, install bin lateral wall runs through and threaded connection has the sleeve, install bin inside wall fixedly connected with horizontal pole, the fixed movable block that has cup jointed of horizontal pole lateral wall, the movable block has been cup jointed in the horizontal pole lateral wall slip, the movable block is connected with the movable block through many third springs, the movable block is located between sleeve and the movable block and contacts with the sleeve lateral wall, install bin inside is equipped with a plurality of dippers, dipperstick one end runs through install bin and outwards extends, the dipperstick other end is connected with the horizontal pole lateral wall through many first springs, the dipperstick lateral wall is connected with the movable block through joint mechanism. Although the accuracy and efficiency of measurement are improved to a certain extent, the method still needs to rely on manual operation and is not suitable for the requirement that whether the product is qualified or not needs to be directly judged on the production line.
Chinese patent document CN110966949a discloses a method for measuring an inner diameter of a sewage pipe, for measuring an inner diameter of a circular pipe, comprising: s1, selecting a datum point in the circular tube; step S2, measuring the length value of the datum point from the inner wall of the circular tube in three optional measuring directions in a cross shape taking the datum point as the center on a cross section circle where the datum point is positioned in the circular tube; step S3, measuring points on the inner wall of the circular tube corresponding to the datum point along the measuring direction are respectively obtained according to the measuring direction, a triangle formed by the three measuring points is processed according to the three length values, and the side lengths of three sides of the triangle are obtained; and S4, processing according to the side lengths of the three sides of the triangle to obtain a diameter value of the circumscribed circle corresponding to the triangle, and outputting the diameter value as the inner diameter of the circular tube. Diameter values are obtained according to the side length of the triangle, the measurement result is accurate, the adaptability is high, but the diameter values are obtained indirectly by means of calculation, certain equipment is needed, and the input cost is high.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information has been made as prior art that is well known to a person of ordinary skill in the art.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: how to solve the problem of low efficiency of the process of detecting whether the round tube product is qualified or not in the prior art.
The invention solves the technical problems by the following technical means:
the device for measuring the diameter of the circular tube product by the cross method comprises a workbench, a base, a plurality of measuring assemblies, a plurality of tolerance probe assemblies, a positioning column and a positioning assembly, wherein the positioning column and the positioning assembly are used for clamping the circular tube product; the base is connected with the workbench, the positioning column is connected with the base, and the positioning column comprises at least three first channels which are radially arranged; the positioning assembly comprises a positioning slide rod which is connected with the first channel in a sliding manner;
at least two measuring assemblies are arranged perpendicular to each other, and the measuring assemblies are connected with the workbench; the measuring assembly comprises a measuring slide rod and a swinging rod, the measuring slide rod can move along the radial direction and is connected with the first channel in a sliding manner, the measuring slide rod comprises at least two measuring blocks, the adjacent measuring blocks are arranged at intervals along the length direction of the measuring slide rod, the middle part of the swinging rod is hinged with the base, one end of the swinging rod is movably connected with the measuring slide rod, and the other end of the swinging rod extends to the side face of one tolerance probe assembly;
Each tolerance probe assembly includes an upper tolerance probe and a lower tolerance probe, each of which is connected to the table.
According to the invention, the diameter of a product is measured through the horizontal measuring component positioned at the horizontal position and the vertical measuring component positioned at the vertical position, the measured actual data is compared with the tolerance range of the target diameter, and the dimension is qualified only when the dimensions in the horizontal direction and the vertical direction are both within the tolerance range; the invention only needs to judge whether the product is qualified or not, the equipment can realize automatic continuous production, the product is picked and placed by a robot, and the qualified piece and the unqualified piece are separated and placed, so that the efficiency is greatly improved.
Preferably, the outer circumference of reference column includes two at least spacing bead, the location slide bar includes the location slider, and when the pipe product was fixed, spacing bead and location slider butt at the medial surface of pipe product.
The three-point positioning is realized by the limiting convex edges and the positioning sliding blocks, the positioning is reliable, the product in a certain range can be adapted, and the adaptability is good.
Preferably, the base comprises a second channel corresponding to the first channel, the bottoms of the positioning slide bar and the measuring slide bar are located in the second channel, and the measuring block is located in the first channel.
Preferably, the positioning assembly further comprises a positioning cylinder, the positioning cylinder is connected with the workbench, and the telescopic end of the positioning cylinder is connected with the positioning slide rod.
Preferably, the measuring assembly further comprises a measuring cylinder, the measuring cylinder is connected with the workbench, and the telescopic end of the measuring cylinder is connected with the measuring slide rod.
Preferably, the tolerance probe assembly further comprises a base and a locking piece, the upper tolerance probe and the lower tolerance probe are connected in parallel with the base, the upper tolerance probe and the lower tolerance probe are identical in structure, the upper tolerance probe comprises a probe cylinder, a reset spring and a probe, one end of the probe cylinder is a blind end, the other end of the probe cylinder is an open end, the probe cylinder can be connected with the base in a sliding mode, the probe is connected with the open end of the probe cylinder, the reset spring is located in the probe cylinder, and two ends of the reset spring are respectively abutted to the blind end of the probe cylinder and the probe.
The upper tolerance probe and the lower tolerance probe are spring type probes, so that reset work can be realized, and repeated use can be realized.
Preferably, two sides of one end of the swing rod connected with the measuring slide bar are arc-shaped, the contact positions of the swing rod and the base and the tolerance probe assembly are long arm sections, the contact positions of the swing rod and the base and the swing rod and the measuring slide bar are short arm sections, and the long arm sections are more than 10 times of the short arm sections.
The long arm section is more than 10 times of the short arm section, so that the size can be enlarged, and the measurement accuracy is improved.
The invention also discloses a measuring method of the device for measuring the diameter by adopting the cross method of the circular tube product, which comprises the following steps:
step S1: processing an upper tolerance gauge and a lower tolerance gauge, respectively placing the upper tolerance gauge and the lower tolerance gauge on a positioning column, clamping the positioning column, debugging the device, and determining the positions of an upper tolerance probe and a lower tolerance probe;
step S2: placing a product to be tested on a positioning column, and clamping through a positioning assembly;
step S3: when the inner diameter of a product is detected, the measuring assembly acts, the measuring slide bar is driven to move until the measuring block contacts with the inner wall of the product to be detected, and when the other ends of the swinging rods of all the measuring assemblies only contact with the lower tolerance probe, the product is qualified, otherwise, the product is unqualified; when the outer diameter of a product is detected, the measuring assembly acts to drive the measuring slide rod to move to the contact of the measuring block and the outer wall of the product to be detected, and when the other ends of the swinging rods of all the measuring assemblies are only contacted with the upper tolerance probes, the product is qualified, otherwise, the product is unqualified.
Preferably, in step S1, if the inner diameter of the product is detected, after the inner diameter upper tolerance gauge and the inner diameter lower tolerance gauge are respectively machined, the following steps are performed:
Step S11, sheathing the tolerance gauge on the inner diameter into a positioning column, clamping by the positioning column and a positioning assembly, enabling the measuring assembly to act simultaneously and contact with the inner wall of a product and then not move, enabling a lower tolerance probe to contact with a swing rod and then fixing, and completing debugging of the lower tolerance probe of the product;
step S12, sheathing the inner diameter lower tolerance gauge into a positioning column, clamping by the positioning column and a positioning assembly, enabling the measuring assembly to act simultaneously and contact with the inner wall of a product and then not move, enabling an upper tolerance probe to contact with a swing rod and then fixing, and completing debugging of the upper tolerance probe of the product;
if the outer diameter of the product is detected, respectively processing an upper outer diameter tolerance gauge and a lower outer diameter tolerance gauge, and then carrying out the following steps:
step S13, sleeving the tolerance gauge on the outer diameter into a positioning column, clamping by the positioning column and a positioning assembly, enabling the measuring assembly to act simultaneously and contact with the outer wall of a product and then not move, enabling an upper tolerance probe to contact with a swing rod and then fixing, and completing debugging of the upper tolerance probe of the product;
and S14, sleeving the outer diameter lower tolerance gauge into a positioning column, clamping by the positioning column and a positioning assembly, enabling the measuring assembly to act simultaneously and contact with the outer wall of the product and then be fixed, and enabling the lower tolerance probe to contact with the swing rod and then be fixed, thus completing the debugging of the lower tolerance probe of the product.
Preferably, in step S2, the positioning assembly and the measuring assembly are moved first, the positioning slide bar and the measuring slide bar move towards the center of the circle by more than 2mm along the first channel, then the product to be measured is placed on the positioning column, the positioning assembly is moved, the positioning slide bar moves away from the center of the circle, and the positioning slide bar contacts with the inner wall of the product to be measured, so that the product to be measured is clamped.
The device and the method replace manual detection of the critical dimension of the workpiece; in automatic production, clamping the produced workpiece, placing the workpiece in the device, and automatically detecting whether the inner diameter, the outer diameter and the height of the product are within the dimensional tolerance range of the qualified product; the detection size is within the acceptable tolerance range, the equipment sends out a product acceptable signal, and the workpiece normally flows into the next working procedure; the detection size is not within the acceptable tolerance range, the equipment sends out a product unacceptable signal, and the workpiece normally flows into an unacceptable to-be-detected area. The data is not required to be read, only whether the data is qualified or not is required to be judged, and the efficiency is greatly improved; and can detect the inner diameter or the outer diameter and the height at one time.
The invention has the advantages that:
(1) According to the invention, the diameter of a product is measured through the horizontal measuring component positioned at the horizontal position and the vertical measuring component positioned at the vertical position, the measured actual data is compared with the tolerance range of the target diameter, and the dimension is qualified only when the dimensions in the horizontal direction and the vertical direction are both within the tolerance range; according to the invention, whether the product is qualified or not is only judged, the equipment can realize automatic continuous production, the product is picked and placed by a robot, and the qualified piece and the unqualified piece are separated and placed, so that the efficiency is greatly improved;
(2) The three-point positioning is realized by the limiting convex edges and the positioning sliding blocks, the positioning is reliable, products in a certain size range can be matched, and the adaptability is good;
(3) The upper tolerance probe and the lower tolerance probe are spring type probes, so that the reset work can be realized, and the repeated use can be realized;
(4) The long arm section is more than 10 times of the short arm section, so that the size can be amplified, and the measurement precision is improved;
(5) The device and the method replace manual detection of the critical dimension of the workpiece; in automatic production, clamping the produced workpiece, placing the workpiece in the device, and automatically detecting whether the inner diameter, the outer diameter and the height of the product are within the dimensional tolerance range of the qualified product; the detection size is within the acceptable tolerance range, the equipment sends out a product acceptable signal, and the workpiece normally flows into the next working procedure; the detection size is not within the acceptable tolerance range, the equipment sends out a product unacceptable signal, and the workpiece normally flows into an unacceptable to-be-detected area. The data is not required to be read, only whether the data is qualified or not is required to be judged, and the efficiency is greatly improved; and can detect the inner diameter or the outer diameter and the height at one time.
Drawings
FIG. 1 is a schematic structural view of a device for measuring diameter by cross method of a circular tube product according to an embodiment of the invention;
FIG. 2 is a top view of a device for measuring diameter by cross method of a round tube product according to an embodiment of the invention;
FIG. 3 is a schematic view of a base of an embodiment of the present invention;
FIG. 4 is a schematic view of a positioning column according to an embodiment of the present invention;
FIG. 5 is a schematic view of the structure of a level measurement assembly according to an embodiment of the present invention;
FIG. 6 is a schematic view of a measuring slide bar according to an embodiment of the present invention;
FIG. 7a is a schematic diagram of an example one of an enlarged size of a swing link according to an embodiment of the present invention;
fig. 7b is a schematic diagram of a second example of a swing link implementation size enlargement according to an embodiment of the present invention;
FIG. 8 is a schematic view of a positioning slide bar according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of the configuration of a horizontal tolerance probe assembly according to an embodiment of the present invention;
FIG. 10 is a cross-sectional view of a tolerance probe according to an embodiment of the present invention;
FIG. 11 is a schematic view of the structure of a height measurement assembly according to an embodiment of the present invention;
FIG. 12 is a schematic diagram of clamping a product to be tested according to an embodiment of the present invention;
FIG. 13 is a schematic view of an embodiment of the present invention wherein the pendulum rod is not connected to the lower tolerance probe and the upper tolerance probe;
FIG. 14 is a schematic view of an embodiment of the present invention with a swing link in communication with a lower tolerance probe and not in communication with an upper tolerance probe;
FIG. 15 is a schematic view of the embodiment of the present invention wherein the pendulum rod is in communication with the lower tolerance probe and the upper tolerance probe;
FIG. 16 is a schematic diagram showing the determination of whether the inner diameter size is acceptable or not according to the embodiment of the present invention;
FIG. 17 is a schematic diagram of an embodiment of the present invention for measuring unequal height products;
FIG. 18 is a schematic view of an embodiment of the invention for measuring the outer diameter of a product;
reference numerals in the drawings:
1. a work table;
2. a base; 21. a second channel;
3. a level measurement assembly; 31. measuring a cylinder; 32. measuring a sliding rod; 321. a slide bar body; 322. a first measurement block; 323. a second measurement block; 324. a hinge block; 33. swing rod;
4. a vertical measurement assembly;
5. a horizontal tolerance probe assembly; 51. a base; 52. a locking member; 53. an upper tolerance probe; 531. a probe cylinder; 532. a return spring; 533. a probe; 54. a lower tolerance probe;
6. a vertical tolerance probe assembly;
7. positioning columns; 71. a limit rib; 72. a first channel;
8. a positioning assembly; 81. positioning a cylinder; 82. positioning a slide bar;
9. a height measurement assembly; 91. a column; 92. a height measuring cylinder; 93. a range finder;
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are 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.
Embodiment one:
as shown in fig. 1 and 2, the device for measuring diameter of a circular tube product by a cross method comprises a workbench 1, a base 2, two measuring assemblies, two tolerance probe assemblies, a positioning column 7 and a positioning assembly 8; the two measuring assemblies are identical in structure and are respectively positioned at a horizontal position and a vertical position, the measuring assembly positioned at the horizontal position is a horizontal measuring assembly 3, the measuring assembly positioned at the vertical position is a vertical measuring assembly 4, the two measuring assemblies are vertically distributed, the horizontal measuring assembly is used for measuring the inner diameter in the horizontal direction, the vertical measuring assembly 4 is used for measuring the inner diameter in the vertical direction, the two tolerance probe assemblies are respectively a horizontal tolerance probe assembly 5 and a vertical tolerance probe assembly 6, the horizontal tolerance probe assembly 5 is matched with the horizontal measuring assembly 3, and the vertical tolerance probe assembly 6 is matched with the vertical measuring assembly 4.
The base 2 is disc-shaped, the base 2 is provided with a circumferential array of screw holes, the base 2 is fixedly connected with the workbench 1 through screws, pin shafts, bolts and the like, the base 2 further comprises three second channels 21 arranged along the radial direction, and the second channels 21 are communicated with the top surface and the cylindrical surface of the base 2 and are not communicated with the bottom surface. The second channel 21 facilitates movement of the positioning assembly 8, the level measuring assembly 3, and the vertical measuring assembly 4 within the second channel 21 away from or toward the center of the base 2. Referring to fig. 3, the second channel 21' is used for sliding the bottom of the horizontal measuring assembly 3 in, the second channel 21 "is used for sliding the bottom of the vertical measuring assembly 4 in, and the second channel 21" is used for sliding the bottom of the positioning assembly 8 in. The second channel 21 ' is at an angle of 45 degrees to the second channel 21 ', and the second channel 21 ' is at an angle of 45 degrees to the second channel 21 ".
As shown in fig. 4, the positioning column 7 is integrally in a cylindrical structure, the outer circumference of the positioning column includes two limiting ribs 71, the limiting ribs 71 extend along the axial direction of the cylindrical surface, the cross section of the limiting ribs 71 is circular arc, and the limiting ribs 71 are located at one side far away from the first channel 72, as shown in fig. 12, wherein the limiting ribs 71 and the positioning assembly 8 are matched for use to fix a product. The positioning column 7 further comprises three first channels 72, and the first channels 72 are of a structure penetrating up and down and are communicated with the cylindrical surface. The first channel 72 corresponds to the position of the second channel 21, the first channel 72 being mainly intended to accommodate sliding therein the upper parts of the positioning assembly 8, the level measuring assembly 3, the vertical measuring assembly 4. The second channel 21 and the first channel 72 are vertically corresponding to form a sliding channel at the front ends of the positioning component 8, the horizontal measuring component 3 and the vertical measuring component 4. Wherein the positioning post 7, as it interferes with other components, may be cut away in part, such as by cutting away an arcuate block at the location of the first channel 72'.
The structure of the horizontal measuring unit 3 and the vertical measuring unit 4 are the same, and the horizontal measuring unit 3 is taken as an example in this embodiment.
As shown in fig. 1 and 5, the horizontal measuring assembly 3 includes a measuring cylinder 31, a measuring slide bar 32, and a swinging rod 33, where the measuring cylinder 31 is fixed on the workbench 1 through a cylinder mounting seat, a telescopic end of the measuring cylinder 31 is directly or indirectly connected with one end of the measuring slide bar 32, and the indirect connection refers to connection between the measuring cylinder and the measuring slide bar 32 through an intermediate structural member such as a connecting block, the swinging rod 33 is hinged on the workbench 1 through a pin shaft, a first end of the swinging rod 33 is in contact connection with the measuring slide bar 32, a second end of the swinging rod 33 extends to one side of the horizontal tolerance probe assembly 5, and after the swinging rod 33 can rotate along the pin shaft by a certain angle, the second end can be in contact with the horizontal tolerance probe assembly 5.
As shown in fig. 5 and 6, the measuring slide bar 32 has a strip structure, and the measuring slide bar 32 includes a slide bar body 321, a first measuring block 322, a second measuring block 323, and a hinge block 324; the sliding rod body 321, the first measuring block 322, the second measuring block 323 and the hinging block 324 are integrally formed, and the thicknesses of the sliding rod body 321 of the first measuring block 322, the second measuring block 323 and the hinging block 324 are the same; the first measuring block 322, the second measuring block 323 and the hinging block 324 are sequentially connected to the sliding rod body 321 at intervals, and the first measuring block 322 is farthest from the measuring cylinder 31; as shown in fig. 1, the slide rod body 321 slides in the second channel 21, and the first measuring block 322 and the second measuring block 323 slide in the first channel 72.
As shown in fig. 6, wherein the right end of the first measuring block 322 and the left end of the second measuring block 323 are cylindrical surfaces, the first measuring block 322 contacts with the inner wall of the product when measuring, the second measuring block 323 contacts with the outer wall of the product when measuring, and a gap between the first measuring block 322 and the second measuring block 323 is used for accommodating the product; the right-hand member of second measurement piece 323 is the vertical face, and the left end of articulated piece 324 is the vertical face, and the space between second measurement piece 323 and the articulated piece 324 is used for being connected with the first end contact of pendulum rod 33, and the outer wall of the first end of pendulum rod 33 is cylinder or circular arc face, and the cylinder is tangent with the vertical face of second measurement piece 323 and articulated piece 324 all the time. When the measuring slide bar 32 moves in the radial direction, the first end of the swing rod 33 can be driven to rotate around the pin shaft, and then the second end also rotates.
The hinge point of the swing rod 33 and the base 2 and the contact position of the swing rod 33 and the tolerance probe assembly are long arm sections, the hinge point of the swing rod 33 and the base 2 and the contact position of the swing rod 33 and the measurement slide rod 32 are short arm sections, and the long arm sections are more than 10 times of the short arm sections. As shown in fig. 7a, the first end of the swing rod 33 is the end of the short arm section away from the pin shaft, the second end of the swing rod 33 is the end of the long arm section away from the pin shaft, the first end of the swing rod 33 moves by 1.38mm, the second end moves by 18.06mm, and as shown in fig. 7b, the first end of the swing rod 33 moves by 1.16mm, and the second end moves by 15.32mm, thereby realizing size amplification and improving measurement accuracy.
As shown in fig. 1, the positioning assembly 8 comprises a positioning cylinder 81 and a positioning slide rod 82, wherein the positioning cylinder 81 is fixed on the workbench 1 through a cylinder mounting seat, and the telescopic end of the positioning cylinder 81 is directly or indirectly connected with one end of the positioning slide rod 82. In this embodiment, the positioning slide 82 is identical in structure to the measuring slide 32. Because the positioning assembly 8 is only used for positioning, the positioning slide rod 82 does not need to be provided with a part for measuring the outer wall and connecting the swing rod 33 in a contact manner, as shown in fig. 8, the positioning slide rod 82 can only comprise a positioning slide block 821, the right end face of the positioning slide block 821 is a cylindrical surface, and when a round tube product needs to be fixed, the limiting convex rib 71 is abutted with the inner side face of the positioning slide block 821 to realize three-point fixation.
The horizontal tolerance probe assembly 5 and the vertical tolerance probe assembly 6 have the same structure, and in this embodiment, the horizontal tolerance probe assembly 5 is taken as an example for illustration.
As shown in fig. 9, the horizontal tolerance probe assembly 5 includes a base 51, a retaining member 52, an upper tolerance probe 53, and a lower tolerance probe 54.
The base 51 is fixedly connected to the workbench 1, the base 51 is provided with two through holes penetrating horizontally and a locking hole vertically communicated with the through holes, the upper tolerance probe 53 and the lower tolerance probe 54 can be slidably connected into the through holes, and the locking piece 52 is connected with the locking hole and is abutted to the upper tolerance probe 53 and the lower tolerance probe 54, so that the upper tolerance probe 53 and the lower tolerance probe 54 are locked.
The upper tolerance probe 53 has the same structure as the lower tolerance probe 54, and in this embodiment, the upper tolerance probe 53 is illustrated as an example, as shown in fig. 10, the upper tolerance probe 53 includes a probe cylinder 531, a return spring 532, and a probe 533, where the left end of the probe cylinder 531 is a blind end, the right end is an open end, the probe cylinder 531 is slidably connected to the base 51, the probe 533 is connected to the open end of the probe cylinder 531, the return spring 532 is located inside the probe cylinder 531, two ends of the return spring 532 are respectively abutted against the blind end of the probe cylinder 531 and the left end of the probe 533, the right end of the probe 533 may contact with the second end of the swing rod 33, after the probe 533 contacts with the swing rod 33, a turn-on signal may be triggered, for example, an end of the probe 533 may be provided with a pressure sensor for identifying a pressure, and when the pressure sensor identifies the pressure, the turn-on is displayed; of course, other ways of identification are also possible.
As shown in fig. 1 and 11, the device for measuring diameter by cross method of round tube product further comprises a height measuring assembly 9, wherein the height measuring assembly 9 comprises a stand column 91, a height measuring cylinder 92 and a distance measuring instrument 93, the stand column 91 is connected with the workbench 1, the height measuring cylinder 92 is connected with the top of the stand column 91, and the distance measuring instrument 93 is connected with the height measuring cylinder 92. The distance meter 93 is a laser distance meter, the precision of which is 0.01mm, meets the requirement of measuring precision, measures actual data by the laser distance meter, compares the actual data with the height tolerance range of the set laser distance meter, confirms whether the laser distance meter is qualified or not, and sends out a signal.
In the embodiment, the inner diameter of a product is measured through the horizontal measuring component 3 positioned at the horizontal position and the vertical measuring component 4 positioned at the vertical position, whether actual data are positioned in the tolerance range of the inner diameter or not is measured, and if the two directions are positioned in the tolerance range, the inner diameter size is qualified; meanwhile, the height measurement assembly 9 realizes height measurement and judges whether the height measurement assembly is positioned in a height tolerance, and if the height measurement assembly is positioned in the height tolerance, the height measurement assembly is qualified in height dimension; only if the inner diameter and the height are qualified, the product is qualified, otherwise, the product is unqualified. The device can realize automatic continuous production by judging whether the product is qualified or not, and the product is picked and placed by a robot, and the qualified piece and the unqualified piece are separated and placed, so that the efficiency is greatly improved.
Embodiment two:
the embodiment provides a method for measuring the inner diameter of a round tube product by adopting the cross method in the first embodiment, which comprises the following steps:
step S1: debugging the device;
specifically, if the inner diameter of a certain product is phi 81+/-0.3 mm, the upper limit size is phi 81.3mm, and the lower limit size is phi 80.7mm. And machining a lower tolerance gauge and an upper tolerance gauge with the inner diameters of phi 80.70mm and phi 81.3mm before equipment debugging.
The inner diameter lower tolerance test tool with phi of 80.70mm is sleeved into the positioning column 7, the positioning cylinder 81 acts to drive the positioning slide rod 82 to move away from the circle center until the positioning slide block 821 contacts with the inner wall of the inner diameter lower tolerance test tool, the movement is stopped, the positioning slide block 821 and the limiting convex edge 71 form three supporting points, and the lower tolerance test tool is clamped; the horizontal measuring assembly 3 and the vertical measuring assembly 4 act simultaneously, namely the measuring cylinder 31 acts, the measuring slide bar 32 moves away from the center of a circle, the first measuring block 322 contacts with the inner wall of the tolerance gauge on the inner diameter, the swinging rod 33 is driven to rotate around the pin shaft in the moving process of the measuring slide bar 32, the swinging rod 33 is kept motionless after stopping rotating, the lower tolerance probe 54 is fixed after moving the lower tolerance probe 54 to contact with the second end of the swinging rod 33, and the debugging of the lower tolerance probe 54 of the product is completed; the lower tolerance probes 54 of the horizontal measuring assembly 3 and the vertical measuring assembly 4 are debugged in the same way.
The inner diameter upper tolerance checking fixture with phi of 81.3mm is sleeved into the positioning column 7, the positioning cylinder 81 acts to drive the positioning slide rod 82 to move away from the circle center until the positioning slide block 821 contacts with the inner wall of the upper tolerance checking fixture, the movement is stopped, the positioning slide block 821 and the limiting convex edge 71 form three supporting points, and the upper tolerance checking fixture is clamped; the horizontal measuring component 3 and the vertical measuring component 4 act simultaneously, namely the measuring cylinder 31 acts, the measuring slide bar 32 moves away from the center direction, the first measuring block 322 contacts with the inner wall of the upper tolerance gauge, the swinging rod 33 is driven to rotate around the pin shaft in the moving process of the measuring slide bar 32, the swinging rod 33 is kept still after stopping rotating, and the lower tolerance probe 54 stretches out to be longer than the upper tolerance probe 53, so that the second end of the swinging rod 33 can compress the lower tolerance probe 54 to shorten the lower tolerance probe 54 in the rotating process of the swinging rod 33 until the swinging rod 33 does not rotate any more, the upper tolerance probe 53 is fixed after the upper tolerance probe 53 contacts with the second end of the swinging rod 33, and the upper tolerance probe 53 of the product is debugged; the upper tolerance probes 53 of the horizontal measuring assembly 3 and the vertical measuring assembly 4 are debugged in the same way.
Height tolerance debugging refers to laser range finder specification debugging.
In the initial state of the apparatus, the height measuring cylinder 92 is retracted.
Step S2: placing a product to be tested on the positioning column 7 and clamping the product through the positioning assembly 8;
specifically, as shown in fig. 12, the positioning component 8, the horizontal measuring component 3 and the vertical measuring component 4 are firstly moved simultaneously, so that the positioning slide rod 82 and the measuring slide rod 32 move 2-3mm towards the center of the circle along the first channel 72 and the second channel 21, the product is ensured to be sleeved outside the positioning column, and then the product to be measured is placed on the positioning column 7, and at the moment, the product is positioned on the first measuring block 322 and the second measuring block 323;
the positioning cylinder 81 acts to drive the positioning slide rod 82 to move away from the circle center until the positioning slide block 821 contacts with the inner wall of the lower tolerance checking fixture, and the movement is stopped, so that the positioning slide block 821 and the limiting convex rib 71 form three supporting points (points A, B and C) to clamp a product to be tested.
Step S3: and the measuring assembly acts to drive the measuring slide rod to move until the measuring block contacts with the inner wall of the product to be measured, and the other ends of the swinging rods 33 of all the measuring assemblies only contact with the lower tolerance probes, so that the product is qualified, or else, the product is unqualified.
Specifically, the horizontal measuring assembly 3 and the vertical measuring assembly 4 operate simultaneously, or the horizontal measuring assembly 3 and the vertical measuring assembly 4 may operate sequentially, and in order to improve the measuring efficiency, they typically operate simultaneously; this embodiment will be described with simultaneous operation as an example. The measuring cylinders 31 of the horizontal measuring assembly 3 and the vertical measuring assembly 4 are operated, and the measuring slide bar 32 moves radially away from the center of the circle until the cylindrical surfaces of the first measuring blocks 322 of the horizontal measuring assembly 3 and the vertical measuring assembly 4 contact the inner wall of the product (as shown by points D and E in fig. 12).
During the movement of the measuring slide bar 32, the swing rod 33 is driven to rotate around the pin shaft, the second end of the swing rod 33 of the horizontal measuring assembly 3 is close to the horizontal tolerance probe assembly 5, and the second end of the swing rod 33 of the vertical measuring assembly 4 is close to the vertical tolerance probe assembly 6. In this embodiment, the lower tolerance probes 54 of the horizontal tolerance probe assembly 5 and the vertical tolerance probe assembly 6 extend longer and the upper tolerance probes 53 extend shorter.
As shown in fig. 13, the second end of the swing link 33 of the horizontal measuring assembly 3 is not connected to the lower tolerance probe 54 and the upper tolerance probe 53, or the second end of the swing link 33 of the vertical measuring assembly 4 is not connected to the lower tolerance probe 54 and the upper tolerance probe 53, which means that the inner diameter of the dimension of the test product is smaller than the lower tolerance dimension of the product and the inner diameter of the product is not qualified.
As shown in fig. 14, the second end of the swing link 33 of the level measuring assembly 3 is in communication with the lower tolerance probe 54 and is not in communication with the upper tolerance probe 53; and the second end of the swing link 33 of the vertical measurement assembly 4 is in communication with the lower tolerance probe 54 and not in communication with the upper tolerance probe 53; two instructions for testing product dimensions to be within tolerance; and the inner diameter of the product is qualified.
If only the horizontal measuring assembly 3 or the vertical measuring assembly 4 satisfies the condition that the lower tolerance probe 54 is connected and the upper tolerance probe 53 is not connected, the product is still unqualified.
As shown in fig. 15, after the second end of the swing rod 33 of the horizontal measuring assembly 3 is connected with the lower tolerance probe 54, the swing rod continues to rotate, compresses the lower tolerance probe 54 and is connected with the upper tolerance probe 53, or the second end of the swing rod 33 of the vertical measuring assembly 4 is connected with the lower tolerance probe 54 and the upper tolerance probe 53, which means that the inner diameter of the dimension of the tested product is larger than the lower tolerance dimension of the product and the inner diameter of the product is unqualified.
To sum up, as shown in fig. 16, only if the horizontal measuring component 3 or the vertical measuring component 4 is satisfied, the product is not connected with the upper tolerance probe 53, and the dimension of the inner diameter is acceptable, otherwise, the dimension is unacceptable.
Meanwhile, the laser range finder measures actual data, compares the actual data with a set height tolerance range of the laser range finder, confirms whether the height is qualified or not, and sends out a qualified or unqualified signal.
Only if the inner diameter and the height are qualified, the product is a qualified product.
As shown in fig. 17, the present embodiment can measure not only a round tube product of equal height but also an inner diameter and a height of a product of different heights.
Embodiment III:
the difference between the method for measuring the outer diameter of the round tube product by the cross method and the device for measuring the outer diameter by the device in the embodiment is that: the horizontal tolerance probe assembly 5 is positioned on the right side of the swing rod 33 of the horizontal measurement assembly 3, the upper tolerance probe 53 is positioned below the upper tolerance probe 53, and the extension length of the upper tolerance probe 53 is greater than the length of the upper tolerance probe 53; the vertical tolerance probe assembly 6 is located on the upper side of the swing link 33 of the level measurement assembly 3.
The method for measuring the outer diameter of the round tube product by the cross method comprises the following steps of reference to the second embodiment:
step S1: debugging the device;
specifically, if the outer diameter of a certain product is phi 100+/-0.3 mm, the upper limit size is phi 100.3mm, and the lower limit size is phi 99.7mm. And machining a lower tolerance gauge and an upper tolerance gauge with the inner diameters phi of 99.70mm and 100.3mm before equipment debugging.
The tolerance gauge on the outer diameter with the diameter phi of 100.3mm is sleeved into the positioning column 7, the positioning cylinder 81 acts to drive the positioning slide rod 82 to move away from the circle center until the positioning slide block 821 contacts with the inner wall of the tolerance gauge on the outer diameter, the movement is stopped, the positioning slide block 821 and the limiting convex rib 71 form three supporting points, and the upper tolerance gauge is clamped; the horizontal measuring component 3 and the vertical measuring component 4 act simultaneously, namely the measuring cylinder 31 acts, the measuring slide bar 32 moves towards the direction close to the center of a circle, the second measuring block 323 contacts with the outer wall of the upper tolerance gauge, the swinging rod 33 is driven to rotate around a pin shaft in the moving process of the measuring slide bar 32, the swinging rod 33 is kept motionless after stopping rotating, the upper tolerance probe 53 is fixed after moving the upper tolerance probe 53 to contact with the second end of the swinging rod 33, and the debugging of the upper tolerance probe 53 of the product is completed; the lower tolerance probes 54 of the horizontal measuring assembly 3 and the vertical measuring assembly 4 are debugged in the same way.
The outer diameter lower tolerance test tool with phi of 99.7mm is sleeved into the positioning column 7, the positioning cylinder 81 acts to drive the positioning slide rod 82 to move away from the circle center until the positioning slide block 821 contacts with the inner wall of the outer diameter lower tolerance test tool, the movement is stopped, the positioning slide block 821 and the limiting convex edge 71 form three supporting points, and the lower tolerance test tool is clamped; the horizontal measuring component 3 and the vertical measuring component 4 act simultaneously, namely the measuring cylinder 31 acts, the measuring slide bar 32 moves towards the direction close to the center of a circle, the second measuring block 323 contacts with the outer wall of the upper tolerance gauge, and in the moving process of the measuring slide bar 32, the swinging rod 33 is driven to rotate around a pin shaft, and after the swinging rod 33 stops rotating, the swinging rod 33 is kept motionless; because the extension length of the upper tolerance probe 53 is greater than that of the lower tolerance probe 54, the second end of the swing rod 33 compresses the upper tolerance probe 53 to shorten the upper tolerance probe 53 in the rotation process of the swing rod 33 until the swing rod 33 is not rotated any more, the lower tolerance probe 54 is fixed after the lower tolerance probe 54 is moved to be in contact with the second end of the swing rod 33, and the lower tolerance probe 54 of the product is debugged; the upper tolerance probes 53 of the horizontal measuring assembly 3 and the vertical measuring assembly 4 are debugged in the same way.
Height tolerance debugging refers to laser range finder specification debugging.
Step S2: placing a product to be tested on the positioning column 7 and clamping the product through the positioning assembly 8;
specifically, as shown in fig. 12, the positioning component 8, the horizontal measuring component 3 and the vertical measuring component 4 are firstly moved simultaneously, so that the positioning slide rod 82 and the measuring slide rod 32 move 2-3mm towards the center of the circle along the first channel 72 and the second channel 21, the product is ensured to be sleeved outside the positioning column 7, and then the product to be measured is placed on the positioning column 7, and at the moment, the product is positioned on the first measuring block 322 and the second measuring block 323;
the positioning cylinder 81 acts to drive the positioning slide rod 82 to move away from the circle center until the positioning slide block 821 contacts with the inner wall of the lower tolerance checking fixture, and the movement is stopped, so that the positioning slide block 821 and the limiting convex rib 71 form three supporting points (points A, B and C) to clamp a product to be tested.
Step S3: and the measuring components act, the measuring cylinder 31 drives the measuring slide rod 32 to move until the measuring block contacts with the outer wall of the product to be measured, and the other ends of the swinging rods 33 of all the measuring components only contact with the upper tolerance probes 53, so that the product is qualified, and otherwise, the product is unqualified.
Specifically, the horizontal measuring assembly 3 and the vertical measuring assembly 4 operate simultaneously, or the horizontal measuring assembly 3 and the vertical measuring assembly 4 may operate sequentially, and in order to improve the measuring efficiency, they typically operate simultaneously; this embodiment will be described with simultaneous operation as an example.
The measuring cylinders 31 of the horizontal measuring assembly 3 and the vertical measuring assembly 4 are operated, and the measuring slide bar 32 moves in the radial direction close to the center of the circle until the cylindrical surfaces of the second measuring blocks 323 of the horizontal measuring assembly 3 and the vertical measuring assembly 4 contact with the outer wall of the product (as points F and G in fig. 18).
During the movement of the measuring slide bar 32, the swing rod 33 is driven to rotate around the pin shaft, the second end of the swing rod 33 of the horizontal measuring assembly 3 is close to the horizontal tolerance probe assembly 5, and the second end of the swing rod 33 of the vertical measuring assembly 4 is close to the vertical tolerance probe assembly 6. In this embodiment, the upper tolerance probes 53 of the horizontal tolerance probe assembly 5 and the vertical tolerance probe assembly 6 extend longer and the lower tolerance probes 54 extend shorter.
If the second end of the swing rod 33 of the horizontal measurement assembly 3 is not connected with the upper tolerance probe 53 and the lower tolerance probe 54, or the second end of the swing rod 33 of the vertical measurement assembly 4 is not connected with the upper tolerance probe 53 and the lower tolerance probe 54, the outer diameter of the dimension of the test product is larger than the upper tolerance dimension of the product, and the outer diameter of the product is unqualified.
If the second end of the swing link 33 of the level measuring assembly 3 is in communication with the upper tolerance probe 53 and not in communication with the lower tolerance probe 54; and the second end of the swing link 33 of the vertical measurement assembly 4 is in communication with the upper tolerance probe 53 and not in communication with the lower tolerance probe 54; two instructions for testing product dimensions to be within tolerance; and the outer diameter of the product is qualified. If only the horizontal measuring assembly 3 or the vertical measuring assembly 4 satisfies the condition that the lower tolerance probe 54 is connected and the upper tolerance probe 53 is not connected, the outer diameter of the product is still unqualified.
If the second end of the swing rod 33 of the horizontal measuring assembly 3 is connected with the upper tolerance probe 53 and the lower tolerance probe 54, or the second end of the swing rod 33 of the vertical measuring assembly 4 is connected with the upper tolerance probe 53 and the lower tolerance probe 54, the outer diameter of the dimension of the tested product is smaller than the upper tolerance dimension of the product, and the outer diameter of the product is unqualified.
In summary, the outer diameter is sized to be acceptable only if either the horizontal measuring assembly 3 or the vertical measuring assembly 4 meets the condition that it is in communication with the upper tolerance probe 53 and not in communication with the lower tolerance probe 54, and is otherwise unacceptable.
Meanwhile, the laser range finder measures actual data, compares the actual data with a set height tolerance range of the laser range finder, confirms whether the height is qualified or not, and sends out a qualified or unqualified signal.
Only if the outer diameter and the height are qualified, the product is a qualified product. The embodiment can measure not only round tube products with equal heights, but also outer diameters and heights of products with different heights.
Of course, the second embodiment and the third embodiment may be integrated, that is, the horizontal tolerance probe assemblies 5 are disposed on two sides of the second end of the swing rod 33 of the horizontal measurement assembly 3, and the vertical tolerance probe assemblies 6 are disposed on two sides of the second end of the swing rod 33 of the vertical measurement assembly 4; after the inner diameter size is detected, the outer diameter is detected, and the height detection is synchronously performed.
Of course, the second embodiment and the third embodiment may be separately performed, and the height detection and the inner diameter detection or the outer diameter detection may be integrated.
The device and the method in the embodiment replace manual detection of the critical dimension of the workpiece. In automatic production, clamping the produced workpiece, placing the workpiece in the device, and automatically detecting whether the inner diameter, the outer diameter and the height of the product are within the dimensional tolerance range of the qualified product; the detection size is within the acceptable tolerance range, the equipment sends out a product acceptable signal, and the workpiece normally flows into the next working procedure; the detection size is not within the acceptable tolerance range, the equipment sends out a product unacceptable signal, and the workpiece normally flows into an unacceptable to-be-detected area. The efficiency is greatly improved, data is not required to be read, and whether the data is qualified or not is only required to be judged.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. The device for measuring the diameter of the circular tube product by the cross method is characterized by comprising a workbench, a base, a plurality of measuring assemblies, a plurality of tolerance probe assemblies, a positioning column and a positioning assembly, wherein the positioning column and the positioning assembly are used for clamping the circular tube product; the base is connected with the workbench, the positioning column is connected with the base, and the positioning column comprises at least three first channels which are radially arranged; the positioning assembly comprises a positioning slide rod which is connected with the first channel in a sliding manner;
at least two measuring assemblies are arranged perpendicular to each other, and the measuring assemblies are connected with the workbench; the measuring assembly comprises a measuring slide rod and a swinging rod, the measuring slide rod can move along the radial direction and is connected with the first channel in a sliding manner, the measuring slide rod comprises at least two measuring blocks, the adjacent measuring blocks are arranged at intervals along the length direction of the measuring slide rod, the middle part of the swinging rod is hinged with the base, one end of the swinging rod is movably connected with the measuring slide rod, and the other end of the swinging rod extends to the side face of one tolerance probe assembly;
each tolerance probe assembly includes an upper tolerance probe and a lower tolerance probe, each of which is connected to the table.
2. The device for measuring diameter of round tube product according to claim 1, wherein the outer circumference of the positioning column comprises at least two limiting ribs, the positioning slide bar comprises a positioning slide block, and when the round tube product is fixed, the limiting ribs are abutted with the positioning slide block on the inner side surface of the round tube product.
3. The device for measuring diameter of round tube products by cross method according to claim 1, wherein the base comprises a second channel corresponding to the first channel, the positioning slide bar and the bottom of the measuring slide bar are positioned in the second channel, and the measuring block is positioned in the first channel.
4. The device for measuring diameter of round tube products by cross method according to claim 1, wherein the positioning assembly further comprises a positioning cylinder, the positioning cylinder is connected with the workbench, and the telescopic end of the positioning cylinder is connected with the positioning slide rod.
5. The device for measuring diameter of round tube products by cross method according to claim 1, wherein the measuring assembly further comprises a measuring cylinder, the measuring cylinder is connected with the workbench, and a telescopic end of the measuring cylinder is connected with the measuring slide rod.
6. The device for measuring diameter by using a tubular product cross method according to claim 1, wherein the tolerance probe assembly further comprises a base and a locking piece, the upper tolerance probe and the lower tolerance probe are connected with the base in parallel, the upper tolerance probe and the lower tolerance probe are identical in structure, the upper tolerance probe comprises a probe cylinder, a reset spring and a probe, one end of the probe cylinder is a blind end, the other end of the probe cylinder is an open end, the probe cylinder can be connected with the base in a sliding mode, the probe is connected with the open end of the probe cylinder, the reset spring is located in the probe cylinder, and two ends of the reset spring are respectively abutted against the blind end of the probe cylinder and the probe.
7. The device for measuring the diameter of the round tube product by the cross method according to claim 1, wherein two sides of one end of the swing rod connected with the measuring slide rod are arc-shaped, the hinge point of the swing rod and the base and the contact position of the swing rod and the tolerance probe assembly are long arm sections, the hinge point of the swing rod and the base and the contact position of the swing rod and the measuring slide rod are short arm sections, and the long arm sections are more than 10 times of the short arm sections.
8. A method for measuring diameter by using the device for measuring diameter of round tube product by cross method according to any one of the claims 1-7, characterized by comprising the following steps:
Step S1: processing an upper tolerance gauge and a lower tolerance gauge, respectively placing the upper tolerance gauge and the lower tolerance gauge on a positioning column, clamping the positioning column, debugging the device, and determining the positions of an upper tolerance probe and a lower tolerance probe;
step S2: placing a product to be tested on a positioning column, and clamping through a positioning assembly;
step S3: when the inner diameter of a product is detected, the measuring assembly acts, the measuring slide bar is driven to move until the measuring block contacts with the inner wall of the product to be detected, and when the other ends of the swinging rods of all the measuring assemblies only contact with the lower tolerance probe, the product is qualified, otherwise, the product is unqualified; when the outer diameter of a product is detected, the measuring assembly acts to drive the measuring slide rod to move to the contact of the measuring block and the outer wall of the product to be detected, and when the other ends of the swinging rods of all the measuring assemblies are only contacted with the upper tolerance probes, the product is qualified, otherwise, the product is unqualified.
9. The method according to claim 8, wherein in step S1, if the inner diameter of the product is detected, the following steps are performed after the upper tolerance gauge and the lower tolerance gauge are respectively processed:
step S11, sheathing the tolerance gauge on the inner diameter into a positioning column, clamping by the positioning column and a positioning assembly, enabling the measuring assembly to act simultaneously and contact with the inner wall of a product and then not move, enabling a lower tolerance probe to contact with a swing rod and then fixing, and completing debugging of the lower tolerance probe of the product;
Step S12, sheathing the inner diameter lower tolerance gauge into a positioning column, clamping by the positioning column and a positioning assembly, enabling the measuring assembly to act simultaneously and contact with the inner wall of a product and then not move, enabling an upper tolerance probe to contact with a swing rod and then fixing, and completing debugging of the upper tolerance probe of the product;
if the outer diameter of the product is detected, respectively processing an upper outer diameter tolerance gauge and a lower outer diameter tolerance gauge, and then carrying out the following steps:
step S13, sleeving the tolerance gauge on the outer diameter into a positioning column, clamping by the positioning column and a positioning assembly, enabling the measuring assembly to act simultaneously and contact with the outer wall of a product and then not move, enabling an upper tolerance probe to contact with a swing rod and then fixing, and completing debugging of the upper tolerance probe of the product;
and S14, sleeving the outer diameter lower tolerance gauge into a positioning column, clamping by the positioning column and a positioning assembly, enabling the measuring assembly to act simultaneously and contact with the outer wall of the product and then be fixed, and enabling the lower tolerance probe to contact with the swing rod and then be fixed, thus completing the debugging of the lower tolerance probe of the product.
10. The method for measuring diameter of round tube product according to claim 8, wherein in step S2, the positioning assembly and the measuring assembly are moved first, the positioning slide bar and the measuring slide bar move along the first channel to the center of circle by more than 2mm, then the product to be measured is placed on the positioning column, the positioning assembly is moved, the positioning slide bar moves away from the center of circle, and the positioning slide bar contacts with the inner wall of the product to be measured, so as to clamp the product to be measured.
CN202210540193.4A 2022-05-18 2022-05-18 Device and method for measuring diameter of circular tube product by cross method Active CN114754653B (en)

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