CN114754653A - Device and method for measuring diameter of round tube product by cross method - Google Patents
Device and method for measuring diameter of round tube product by cross method Download PDFInfo
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- CN114754653A CN114754653A CN202210540193.4A CN202210540193A CN114754653A CN 114754653 A CN114754653 A CN 114754653A CN 202210540193 A CN202210540193 A CN 202210540193A CN 114754653 A CN114754653 A CN 114754653A
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- 238000005259 measurement Methods 0.000 claims description 22
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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
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- 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
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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
- G01B5/02—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
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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
- G01B5/12—Measuring arrangements characterised by the use of mechanical techniques for measuring diameters internal diameters
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Abstract
The invention discloses a device for measuring the diameter of a round tube product by a cross method, which comprises a workbench, a base, a plurality of measuring components, a plurality of tolerance probe components, a positioning column and a positioning component, wherein the workbench is provided with a base; the positioning column is connected with the base, and the positioning assembly comprises a positioning sliding rod capable of moving along the radial direction; at least two measuring assemblies are arranged vertically to each other, and the measuring assemblies are connected with the workbench; the measuring assembly comprises a measuring sliding rod and a swinging rod which can move along the radial direction, the measuring sliding rod 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 sliding rod, 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 cross-method diameter measuring method for the round tube product. The invention has the beneficial effects that: automatic continuous production is realized, products are taken and placed through a robot, qualified parts and unqualified parts are opened, and efficiency is greatly improved.
Description
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 pipe products, such as tail pipes and the like, are detected to determine whether the products are qualified, and key dimensions (inner diameter, outer diameter and height) are usually measured.
Chinese patent document CN212363051U discloses a tolerance testing tool for the roundness of the inner diameter of a pipe fitting, which comprises a threaded cylinder, the inner side wall of the threaded cylinder is in threaded connection with two threaded rods, the outer side wall of the threaded cylinder is fixedly connected with an installation box, the outer side wall of the installation box penetrates through and is in threaded connection with a sleeve, the inner side wall of the installation box is fixedly connected with a cross rod, the outer side wall of the cross rod is fixedly sleeved with a moving block, the outer side wall of the cross rod is sleeved with a moving block in a sliding manner, the movable block is connected with the movable block through a plurality of third springs, the movable block is positioned between the sleeve and the movable block and is contacted with the outer side wall of the sleeve, a plurality of measuring scales are arranged in the mounting box, one end of each measuring scale penetrates through the mounting box and extends outwards, the dipperstick other end is connected with the horizontal pole lateral wall through many first springs, the dipperstick lateral wall passes through latch mechanism and is connected with the movable block. Although the precision and the efficiency of measurement are improved to a certain extent, the method still needs to depend on manual operation and is not suitable for the requirement that whether the product is qualified or not needs to be directly judged on a production line.
Chinese patent document CN110966949A discloses a method for measuring the inner diameter of a rain sewage pipe, which is used for measuring the inner diameter of a circular pipe, and includes: step S1, selecting a datum point inside the circular tube; step S2, on the cross section circle where the reference point is located in the circular tube, the length value of the reference point from the inner wall of the circular tube is measured in any three measuring directions in a cross shape taking the reference point as the center; step S3, respectively obtaining the measuring points on the inner wall of the circular tube corresponding to the reference points along the measuring direction according to the measuring direction, and respectively processing to obtain the side lengths of three sides of a triangle according to three length values according to the triangle formed by the three measuring points; and step 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. The diameter value is obtained according to the side length of the triangle, the measurement result is accurate, the adaptability is strong, the diameter value needs to be indirectly obtained through calculation, certain equipment needs to be invested, and the investment 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 forms part of the prior art that is already known to a person skilled in the art.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: how to solve among the prior art pipe product and detecting whether qualified process inefficiency problem.
The invention solves the technical problems through 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 components, a plurality of tolerance probe components, a positioning column and a positioning component, wherein the positioning column and the positioning component are used for clamping the circular tube product; the base is connected with the workbench, the positioning column is connected with the base and comprises at least three first channels which are arranged in the radial direction; the positioning assembly comprises a positioning sliding rod which is connected with the first channel in a sliding manner;
at least two measuring assemblies are arranged vertically to each other, and the measuring assemblies are connected with the workbench; the measuring assembly comprises a measuring sliding rod and a swinging rod, the measuring sliding rod can move along the radial direction, the measuring sliding rod is connected with the first channel in a sliding mode, the measuring sliding rod comprises at least two measuring blocks, the adjacent measuring blocks are arranged at intervals along the length direction of the measuring sliding rod, the middle part of the swinging rod is hinged to the base, one end of the swinging rod is movably connected with the measuring sliding rod, and the other end of the swinging rod extends to the side face of one tolerance probe assembly;
Each tolerance probe assembly comprises an upper tolerance probe and a lower tolerance probe, and the upper tolerance probe and the lower tolerance probe are connected with the workbench.
The diameter of a product is measured by 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 positioned in the tolerance range; according to the invention, only whether the product is qualified or not needs to be judged, the automatic continuous production can be realized by the equipment, the product is taken and placed by the robot, qualified parts and unqualified parts are separated, and the efficiency is greatly improved.
Preferably, the outer circumference of the positioning column comprises at least two limiting convex edges, the positioning sliding rod comprises a positioning sliding block, and when the round tube product is fixed, the limiting convex edges and the positioning sliding block are abutted to the inner side face of the round tube product.
Three-point positioning is realized by the limiting convex edges and the positioning sliding blocks, the positioning is reliable, the positioning device can be adapted to products in a certain range, and the adaptability is good.
Preferably, the base includes a second channel corresponding to the first channel, the bottom of the positioning slide bar and the bottom of 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 sliding 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, tolerance probe subassembly still includes base, retaining member, go up the tolerance probe with tolerance probe parallel connection down the base, go up the tolerance probe with tolerance probe structure is the same down, it includes a probe section of thick bamboo, reset spring, probe to go up the tolerance probe, the one end of a probe section of thick bamboo is the cecum, the other end is the open end, a probe section of thick bamboo can sliding connection the base, the probe connection the open end of a probe section of thick bamboo, reset spring is located the inside of a probe section of thick bamboo, reset spring's both ends respectively the butt be in the cecum of a probe section of thick bamboo with the probe.
Go up the tolerance probe and be the spring probe with tolerance probe down, can realize the work that resets, realize repetitious usage.
Preferably, the two sides of one end of the oscillating rod connected with the measuring slide rod are arc-shaped, the hinged point of the oscillating rod and the base and the contact position of the oscillating rod and the tolerance probe assembly are long arm sections, the hinged point of the oscillating rod and the base and the contact position of the oscillating rod and the measuring slide rod are short arm sections, and the long arm section is more than 10 times of the short arm section.
The long arm section is more than 10 times of the short arm section, so that the size can be enlarged, and the measurement precision is improved.
The invention also discloses a measuring method of the device for measuring the diameter by adopting the circular tube product cross method, which comprises the following steps:
step S1: processing an upper tolerance checking fixture and a lower tolerance checking fixture, respectively placing the upper tolerance checking fixture and the lower tolerance checking fixture on the positioning column and clamping the upper tolerance checking fixture and the lower tolerance checking fixture, debugging the device, and determining the positions of the upper tolerance probe and the lower tolerance probe;
step S2: placing a product to be detected in a positioning column, and clamping the product through a positioning assembly;
step S3: when the inner diameter of a product is detected, the measuring assembly acts to drive the measuring slide bar to move until the measuring block is contacted with the inner wall of the product to be detected, and when the other ends of the swing rods of all the measuring assemblies are only contacted with the lower tolerance probe, the product is qualified, otherwise, the product is unqualified; when the outer diameter of the product is detected, the measuring assembly acts to drive the measuring slide rod to move until the measuring block is contacted with the outer wall of the product to be measured, and when the other ends of the swing rods of all the measuring assemblies are only contacted with the upper tolerance probe, 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 detection tool and the inner diameter lower tolerance detection tool are respectively processed, the following steps are performed:
Step S11, sleeving the tolerance gauge on the inner diameter into a positioning column, clamping by the positioning column and a positioning assembly, simultaneously moving the measuring assembly to be in contact with the inner wall of the product and then fixing a lower tolerance probe after the measuring assembly is in contact with the oscillating bar, and debugging the lower tolerance probe of the product;
step S12, sleeving the inner diameter lower tolerance gauge into a positioning column, clamping by the positioning column and a positioning assembly, simultaneously moving the measuring assembly to be in contact with the inner wall of the product and then fixing an upper tolerance probe after the upper tolerance probe is in contact with the oscillating bar, and debugging the upper tolerance probe of the product;
if detect the product external diameter, process respectively on the external diameter tolerance examine utensil and the external diameter tolerance examine the utensil back down, carry out following step:
step S13, sleeving the tolerance gauge on the outer diameter into a positioning column, clamping by the positioning column and a positioning assembly, simultaneously moving the measuring assembly to be in contact with the outer wall of the product and then fixing an upper tolerance probe after the upper tolerance probe is in contact with the oscillating bar, and debugging the upper tolerance probe of the product;
and step S14, sleeving the outer diameter lower tolerance checking tool into the positioning column, clamping by the positioning column and the positioning component, simultaneously moving the measuring component to be in contact with the outer wall of the product and then fixing the lower tolerance probe after the measuring component is in contact with the oscillating bar, and debugging the lower tolerance probe of the product.
Preferably, in step S2, the positioning assembly and the measuring assembly are first moved, the positioning slide bar and the measuring slide bar move to the center of the circle by more than 2mm along the first channel, the product to be measured is then 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 block contacts with the inner wall of the product to be measured, so as to clamp the product to be measured.
The device and the method of the invention replace manual work to detect the critical dimension of the workpiece; in the automatic production, a production workpiece is clamped and placed in the device, and whether the inner diameter, the outer diameter and the height of a product are within the dimensional tolerance range of a qualified product or not is automatically detected; when the detected size is within the qualified tolerance range, the equipment sends out a product qualified signal, and the workpiece normally flows into the next procedure; and if the detected size is not within the qualified tolerance range, the equipment sends out an unqualified product signal, and the workpiece normally flows into an unqualified area to be detected. Data reading is not needed, and only the qualification judgment is needed, so that the efficiency is greatly improved; and can be detected at one time with inner or outer diameter and height.
The invention has the advantages that:
(1) the diameter of the product is measured by 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 positioned in the tolerance range; according to the automatic continuous production equipment, only whether the product is qualified or not needs to be judged, automatic continuous production can be achieved, the product is taken and placed through a robot, qualified parts and unqualified parts are opened, and efficiency is greatly improved;
(2) The limiting convex edges and the positioning sliding blocks realize three-point positioning, the positioning is reliable, the positioning device can be adapted to products in a certain size range, and the adaptability is good;
(3) the upper tolerance probe and the lower tolerance probe are spring probes, so that the resetting 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 enlarged, and the measurement precision is improved;
(5) the device and the method of the invention replace manual work to detect the critical dimension of the workpiece; in the automatic production, a production workpiece is clamped and placed in the device, and whether the inner diameter, the outer diameter and the height of a product are within the dimensional tolerance range of a qualified product or not is automatically detected; when the detected size is within the qualified tolerance range, the equipment sends out a product qualified signal, and the workpiece normally flows into the next procedure; and if the detected size is not within the qualified tolerance range, the equipment sends out an unqualified product signal, and the workpiece normally flows into an unqualified area to be detected. Data reading is not needed, and only the qualification judgment is needed, so that the efficiency is greatly improved; and can be detected at one time with inner or outer diameter and height.
Drawings
FIG. 1 is a schematic structural diagram of a device for cross-measuring the diameter of a round pipe product according to an embodiment of the invention;
FIG. 2 is a top view of an apparatus for cross-measuring a diameter of a round tube product according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a base according to an embodiment of the present invention;
FIG. 4 is a schematic view of a positioning post according to an embodiment of the present invention;
FIG. 5 is a schematic view of a leveling assembly according to an embodiment of the present invention;
FIG. 6 is a schematic view of the structure of a measuring slide bar according to an embodiment of the present invention;
FIG. 7a is a schematic diagram of an example of a swing link according to an embodiment of the present invention;
FIG. 7b is a diagram of an example II of achieving size enlargement of a swing link according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a positioning slide bar according to an embodiment of the present invention;
FIG. 9 is a schematic structural view 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 on an embodiment of the present invention;
FIG. 11 is a schematic structural view of a height measuring assembly according to an embodiment of the present invention;
FIG. 12 is a schematic view of a clamping of a product to be tested according to an embodiment of the present invention;
FIG. 13 is a schematic diagram of the pendulum rod of the embodiment of the present invention not being connected to both the lower tolerance probe and the upper tolerance probe;
FIG. 14 is a schematic diagram of a pendulum rod in an embodiment of the present invention in communication with a lower tolerance probe and not in communication with an upper tolerance probe;
FIG. 15 is a schematic diagram of the pendulum rod of the present invention in communication with both the lower tolerance probe and the upper tolerance probe;
FIG. 16 is a schematic view illustrating the determination of whether the inner diameter size is acceptable or not according to an embodiment of the present invention;
FIG. 17 is a schematic view of an embodiment of the present invention measuring unequal height products;
FIG. 18 is a schematic illustration of measuring the outer diameter of a product according to an embodiment of the present invention;
the reference numbers in the figures:
1. a work table;
2. a base; 21. a second channel;
3. a leveling component; 31. a measuring cylinder; 32. measuring a slide bar; 321. a slide bar body; 322. a first measurement block; 323. a second measurement block; 324. a hinged block; 33. a 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 barrel; 532. a return spring; 533. a probe; 54. a lower tolerance probe;
6. a vertical tolerance probe assembly;
7. a positioning column; 71. a limiting convex rib; 72. a first channel;
8. a positioning assembly; 81. positioning the air cylinder; 82. positioning the slide bar;
9. a height measuring assembly; 91. a column; 92. a height measuring cylinder; 93. a range finder;
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
as shown in fig. 1 and 2, the device for measuring the diameter of a circular tube product by using 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 components have the same structure and are respectively positioned at a horizontal position and a vertical position, the measuring component positioned at the horizontal position is a horizontal measuring component 3, the measuring component positioned at the vertical position is a vertical measuring component 4, the two measuring components are mutually and vertically distributed, the horizontal measuring component is used for measuring the inner diameter in the horizontal direction, the vertical measuring component 4 is used for measuring the inner diameter in the vertical direction, the two tolerance probe components are respectively a horizontal tolerance probe component 5 and a vertical tolerance probe component 6, the horizontal tolerance probe component 5 is matched with the horizontal measuring component 3 for use, and the vertical tolerance probe component 6 is matched with the vertical measuring component 4 for use.
The base 2 is disc-shaped, the base 2 is provided with screw holes in a circumferential array, the base 2 is fixedly connected with the workbench 1 through screws, pin shafts or 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 the movement of the positioning assembly 8, the horizontal measuring assembly 3 and the vertical measuring assembly 4 away from or close to the center of the base 2 in the second channel 21. Referring to fig. 3, a second channel 21 'is used for the bottom of the horizontal measuring assembly 3 to slide in, a second channel 21 "is used for the bottom of the vertical measuring assembly 4 to slide in, and a second channel 21' is used for the bottom of the positioning assembly 8 to slide in. The second channel 21 ' is angled at 45 degrees to the second channel 21 ', and the second channel 21 ' is angled at 45 degrees to the second channel 21 ".
As shown in fig. 4, the positioning column 7 is of a cylindrical structure as a whole, the outer circumference of the positioning column includes two limiting protruding ridges 71, the limiting protruding ridges 71 extend axially along the cylindrical surface, the cross section of the limiting protruding ridges 71 is a circular arc and is located at a side far away from the first passage 72, as shown in fig. 12, wherein the limiting protruding ridges 71 are used in cooperation with the positioning assembly 8 to fix the product. The positioning column 7 further comprises three first passages 72, and the first passages 72 are vertically penetrated and communicated with the cylindrical surface. The first passage 72 corresponds to the position of the second passage 21, and the first passage 72 is mainly used for accommodating the upper parts of the positioning assembly 8, the horizontal measuring assembly 3 and the vertical measuring assembly 4 to slide in the first passage. The second channel 21 and the first channel 72 correspond up and down to form a sliding channel at the front end of the positioning component 8, the horizontal measuring component 3 and the vertical measuring component 4. Where the locating post 7 interferes with another member, a portion may be cut away, such as an arcuate block at the location of the first channel 72'.
The horizontal measuring unit 3 and the vertical measuring unit 4 have the same structure, and the horizontal measuring unit 3 is taken as an example for the description of the present embodiment.
As shown in fig. 1 and 5, the horizontal measuring component 3 includes a measuring cylinder 31, a measuring slide bar 32 and a swing bar 33, the measuring cylinder 31 is fixed on the workbench 1 through a cylinder mounting seat, the telescopic end of the measuring cylinder 31 is directly or indirectly connected with one end of the measuring slide bar 32, the indirect connection refers to the realization of the connection of the two through intermediate structural members such as a connecting block, the swing bar 33 is hinged on the workbench 1 through a pin shaft, the first end of the swing bar 33 is in contact connection with the measuring slide bar 32, the second end of the swing bar 33 extends to one side of the horizontal tolerance probe component 5, and the second end can be in contact with the horizontal tolerance probe component 5 after the swing bar 33 can rotate for a certain angle along the pin shaft.
As shown in fig. 5 and 6, the measuring slide bar 32 is an elongated 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 slide bar body 321 is integrally formed with the first measuring block 322, the second measuring block 323 and the hinge block 324, and the thicknesses of the slide bar body 321 are the same for the first measuring block 322, the second measuring block 323 and the hinge block 324; the first measuring block 322, the second measuring block 323 and the hinge block 324 are sequentially connected to the sliding rod body 321 at intervals, and the first measuring block 322 is farthest away from the measuring cylinder 31; as shown in fig. 1, the sliding 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, the right end of the first measuring block 322 and the left end of the second measuring block 323 are both cylindrical surfaces, the first measuring block 322 is in contact with the inner wall of the product during measurement, the second measuring block 323 is in contact with the outer wall of the product during measurement, and a gap between the first measuring block 322 and the second measuring block 323 is used for accommodating the product; the right end of the second measuring block 323 is a vertical surface, the left end of the hinging block 324 is a vertical surface, a gap between the second measuring block 323 and the hinging block 324 is used for being in contact connection with the first end of the swing rod 33, the outer wall of the first end of the swing rod 33 is a cylinder or an arc surface, and the cylinder surface is always tangent to the vertical surfaces of the second measuring block 323 and the hinging block 324. 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 hinged 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 hinged point of the swing rod 33 and the base 2 and the contact position of the swing rod 33 and the measuring slide rod 32 are short arm sections, and the long arm section is more than 10 times of the short arm section. As shown in fig. 7a, the first end of the swing link 33 is the end of the short arm section far away from the pin, the second end of the swing link 33 is the end of the long arm section far away from the pin, the first end of the swing link 33 moves by 1.38mm, the second end moves by 18.06mm, and as shown in fig. 7b, the first end of the swing link 33 moves by 1.16mm, and the second end moves by 15.32mm, so that the size amplification is realized, and the measurement accuracy is improved.
As shown in fig. 1, the positioning assembly 8 includes a positioning cylinder 81 and a positioning slide rod 82, the positioning cylinder 81 is fixed on the workbench 1 through a cylinder mounting seat, and a telescopic end of the positioning cylinder 81 is directly or indirectly connected to one end of the positioning slide rod 82. In this embodiment, the positioning slide 82 has the same structure as 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 portion 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 may only include a positioning slide block 821, the right end surface of the positioning slide block 821 is a cylindrical surface, and when a circular tube product needs to be fixed, the limiting convex rib 71 and the positioning slide block 821 are abutted against the inner side surface of the circular tube product, so that three-point fixing is realized.
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 description.
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 upper tolerance probe 53 and the lower tolerance probe 54 have the same structure, and this embodiment is described by taking the upper tolerance probe 53 as an example, as shown in fig. 10, the upper tolerance probe 53 includes a probe cylinder 531, a return spring 532, a probe 533, the left end of the probe cylinder 531 is a blind end, the right end is an open end, the probe cylinder 531 can be slidably connected with the base 51, the probe 533 is connected with 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 respectively abut against the blind end of the probe cylinder 531 and the left end of the probe 533, the right end of the probe 533 can contact with the second end of the swing link 33, the probe 533 can trigger a switch-on signal after contacting with the swing link 33, if the end of the probe 533 can be provided with a pressure sensor for pressure identification, and when the pressure sensor identifies pressure, it is indicated to be on; of course, other identification means are possible.
As shown in fig. 1 and fig. 11, the device for measuring the diameter of the round tube product by the cross-type method further comprises a height measuring assembly 9, wherein the height measuring assembly 9 comprises a column 91, a height measuring cylinder 92 and a distance measuring instrument 93, the column 91 is connected with the workbench 1, the height measuring cylinder 92 is connected with the top of the column 91, and the distance measuring instrument 93 is connected with the height measuring cylinder 92. The distance measuring instrument 93 is a laser distance measuring instrument, the precision of the distance measuring instrument is 0.01mm, the requirement of measuring precision is met, the laser distance measuring instrument measures actual data, the actual data is compared with a set laser distance measuring instrument height tolerance range, whether the actual data is qualified or not is confirmed, and a signal is sent.
In the embodiment, the inner diameter of the product is measured by the horizontal measuring component 3 positioned at the horizontal position and the vertical measuring component 4 positioned at the vertical position, whether the measured actual data is 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 dimension of the inner diameter is qualified; meanwhile, the height measuring component 9 realizes the height measurement and judges whether the height measurement is within the height tolerance or not, and the height measurement is qualified if the height measurement is within the height tolerance; only when the inner diameter and the height are both qualified, the product is qualified, otherwise, the product is unqualified. Only need to judge whether qualified to the product, this equipment can realize automatic continuous production, and the product is got through the robot and is put, and qualified spare is divided with unqualified spare and is opened, and efficiency obtains improving by a wide margin.
The second embodiment:
the embodiment provides a method for measuring an inner diameter of a round pipe product by adopting a 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 80.7 mm. And machining a lower tolerance checking fixture and an upper tolerance checking fixture with the inner diameters of phi 80.70mm and phi 81.3mm before debugging the equipment.
Sleeving a lower tolerance checking tool with the inner diameter of 80.70mm into the positioning column 7, driving the positioning slide rod 82 to move away from the center of a circle by the action of the positioning cylinder 81 until the positioning slide block 821 is contacted with the inner wall of the lower tolerance checking tool with the inner diameter, stopping moving, forming three supporting points by the positioning slide block 821 and the limiting convex edge 71, and clamping the lower tolerance checking tool; the horizontal measuring component 3 and the vertical measuring component 4 act simultaneously, namely the measuring cylinder 31 acts, the measuring slide rod 32 moves towards the direction far away from the circle center, the first measuring block 322 is contacted with the inner wall of the tolerance checking fixture on the inner diameter, the swing rod 33 is driven to rotate around the pin shaft in the movement process of the measuring slide rod 32, the swing rod 33 is kept still after the swing rod 33 stops rotating, the lower tolerance probe 54 is fixed after the lower tolerance probe 54 is moved to be contacted with the second end of the swing rod 33, and the debugging of the lower tolerance probe 54 of the product is finished; the lower tolerance probes 54 of the horizontal measuring assembly 3 and the vertical measuring assembly 4 are debugged in the same way.
Sleeving a tolerance gauge with the inner diameter of phi 81.3mm into the positioning column 7, driving the positioning slide rod 82 to move away from the center of a circle by the action of the positioning cylinder 81 until the positioning slide block 821 is contacted with the inner wall of the upper tolerance gauge, stopping moving, and forming three supporting points by the positioning slide block 821 and the limiting convex edge 71 to clamp the upper tolerance gauge; 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 away from the circle center, the first measuring block 322 is in contact with the inner wall of the upper tolerance checking fixture, the swing bar 33 is driven to rotate around the pin shaft in the movement process of the measuring slide bar 32, the swing bar 33 is kept motionless after the swing bar 33 stops rotating, and the extending length of the lower tolerance probe 54 is greater than that of the upper tolerance probe 53, so that the second end of the swing bar 33 can compress the lower tolerance probe 54 to shorten the same until the swing bar 33 does not rotate any more, the upper tolerance probe 53 is fixed after the upper tolerance probe 53 is moved to be connected with the second end of the swing bar 33, and the debugging of the upper tolerance probe 53 of a product is completed; the upper tolerance probe 53 of the horizontal measuring component 3 and the vertical measuring component 4 are debugged in the same way.
The height tolerance debugging is debugged according to the instruction of the laser range finder.
In the initial state of the apparatus, the height measuring cylinder 92 is retracted.
Step S2: placing a product to be tested in the positioning column 7, and clamping through the positioning assembly 8;
specifically, as shown in fig. 12, the positioning assembly 8, the horizontal measuring assembly 3, and the vertical measuring assembly 4 are simultaneously operated, so that the positioning slide rod 82 and the measuring slide rod 32 move 2-3mm to the center of a circle along the first channel 72 and the second channel 21, so as to ensure that the product can be sleeved outside the positioning column, and then the product to be measured is placed on the positioning column 7, and at this time, the product is located in 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 is contacted 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 edge 71 form three supporting points (point A, point B and point C), and the product to be detected is clamped.
Step S3: and (3) the measuring components act to drive the measuring slide rod to move until the measuring block is contacted with the inner wall of the product to be measured, and the other ends of the swing rods 33 of all the measuring components are only contacted with the lower tolerance probe, so that the product is qualified, otherwise, the product is unqualified.
Specifically, the horizontal measuring component 3 and the vertical measuring component 4 act simultaneously, or the horizontal measuring component 3 and the vertical measuring component 4 act sequentially, and in order to improve the measuring efficiency, the horizontal measuring component 3 and the vertical measuring component 4 usually act simultaneously; the present embodiment will be described with reference to a simultaneous operation as an example. The measuring cylinders 31 of the horizontal measuring assembly 3 and the vertical measuring assembly 4 both act, and the measuring slide rod 32 moves in the radial direction 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 in points D and E in fig. 12).
During the movement of the measuring slide bar 32, the swing link 33 is driven to rotate around the pin shaft, the second end of the swing link 33 of the horizontal measuring component 3 is close to the horizontal tolerance probe component 5, and the second end of the swing link 33 of the vertical measuring component 4 is close to the vertical tolerance probe component 6. In this embodiment, the lower tolerance probe 54 of the horizontal tolerance probe assembly 5 and the vertical tolerance probe assembly 6 extend longer and the upper tolerance probe 53 extends shorter.
As shown in fig. 13, the second end of the swing link 33 of the horizontal measurement 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 measurement assembly 4 is not connected to the lower tolerance probe 54 and the upper tolerance probe 53, which indicates that the inner diameter of the tested 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 leveling unit 3 is connected to the lower tolerance probe 54, and is not connected to the upper tolerance probe 53; and the second end of the swing link 33 of the vertical measuring component 4 is connected with the lower tolerance probe 54 and is not connected with the upper tolerance probe 53; two show that the test product dimensions lie within the tolerance range; the inner diameter of the product is qualified.
If only the horizontal measuring unit 3 or the vertical measuring unit 4 satisfies the condition of being connected to the lower tolerance probe 54 and not connected to the upper tolerance probe 53, the product is still unqualified.
As shown in fig. 15, after the second end of the swing link 33 of the horizontal measuring assembly 3 is connected with the lower tolerance probe 54, the rotation is continued, the lower tolerance probe 54 is compressed and is connected with both the upper tolerance probe 53, or the second end of the swing link 33 of the vertical measuring assembly 4 is connected with both the lower tolerance probe 54 and the upper tolerance probe 53, which indicates that the inner diameter of the tested product size is larger than the lower tolerance size of the product, and the inner diameter of the product is not qualified.
In summary, as shown in fig. 16, the inner diameter of the product is qualified only if the horizontal measuring assembly 3 or the vertical measuring assembly 4 is in connection with the lower tolerance probe 54 and not in connection with the upper tolerance probe 53, otherwise, the inner diameter is not qualified.
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 when the inner diameter and the height are both qualified, the product is qualified.
As shown in fig. 17, this embodiment can measure the inner diameter and height of the round tube products with equal height, and also can measure the inner diameter and height of the products with unequal height.
Example three:
in this embodiment, when the above method for measuring the outer diameter of the circular tube product by the cross method is used, and the outer diameter is measured by the above device, the difference from the device in the first embodiment is that: the horizontal tolerance probe assembly 5 is positioned at the right side of the swing rod 33 of the horizontal measuring assembly 3, the upper tolerance probe 53 is positioned below the upper tolerance probe 53, and the protruding length of the upper tolerance probe 53 is greater than that of the upper tolerance probe 53; the vertical tolerance probe assembly 6 is located on the upper side of the pendulum 33 of the leveling assembly 3.
Referring to the second embodiment, the steps of the cross-type method for measuring the outer diameter of the round tube product are as follows:
step S1: debugging the device;
specifically, if the outer diameter of a certain product is phi 100 +/-0.3 mm, the upper limit size of the product is phi 100.3mm, and the lower limit size of the product is phi 99.7 mm. And machining a lower tolerance checking fixture and an upper tolerance checking fixture with the inner diameters of phi 99.70mm and phi 100.3mm before debugging the equipment.
The tolerance checking tool on the outer diameter with the diameter 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 center of the circle until the positioning slide block 821 is contacted with the inner wall of the tolerance checking tool on the outer diameter, the movement is stopped, the positioning slide block 821 and the limiting convex edge 71 form three supporting points, and the upper tolerance checking 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 circle center, the second measuring block 323 is in contact with the outer wall of the upper tolerance checking fixture, the swing rod 33 is driven to rotate around the pin shaft in the movement process of the measuring slide bar 32, the swing rod 33 is kept still after the swing rod 33 stops rotating, the upper tolerance probe 53 is fixed after the upper tolerance probe 53 is moved to be in contact with the second end of the swing rod 33, and the debugging of the upper tolerance probe 53 of a 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.
Sleeving a lower tolerance gauge with the outer diameter of phi 99.7mm into the positioning column 7, driving the positioning slide rod 82 to move away from the center of the circle by the action of the positioning cylinder 81 until the positioning slide block 821 is contacted with the inner wall of the lower tolerance gauge, stopping moving, forming three supporting points by the positioning slide block 821 and the limiting convex edge 71, and clamping the lower tolerance gauge; 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 circle center, the second measuring block 323 contacts with the outer wall of the upper tolerance checking fixture, the swing rod 33 is driven to rotate around the pin shaft in the movement process of the measuring slide bar 32, and the swing rod 33 is kept stationary after the swing rod 33 stops rotating; because the extension length of the upper tolerance probe 53 is greater than that of the lower tolerance probe 54, in the rotation process of the swing rod 33, the second end of the swing rod 33 compresses the upper tolerance probe 53 to shorten the upper tolerance probe, until the swing rod 33 does not rotate any more, and after the lower tolerance probe 54 is moved to be in contact with the second end of the swing rod 33, the lower tolerance probe 54 is fixed, and the debugging of the lower tolerance probe 54 of a product is completed; the upper tolerance probe 53 of the horizontal measuring component 3 and the vertical measuring component 4 are debugged in the same way.
The height tolerance debugging is debugged according to the instruction of the laser range finder.
Step S2: placing a product to be detected in 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 moved simultaneously, so that the positioning sliding rod 82 and the measuring sliding rod 32 move 2-3mm to the center of a circle along the first channel 72 and the second channel 21, so as to ensure that the product can be sleeved outside the positioning column 7, and then the product to be measured is placed on the positioning column 7, and at this time, the product is located in 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 is contacted with the inner wall of the lower tolerance checking fixture, and stops moving, so that the positioning slide block 821 and the limiting convex edge 71 form three supporting points (point A, point B and point C), and the product to be detected is clamped.
Step S3: and (3) the measuring components act, the measuring cylinder 31 drives the measuring slide rod 32 to move to the measuring block to be contacted with the outer wall of the product to be measured, the other ends of the swing rods 33 of all the measuring components are only contacted with the upper tolerance probe 53, the product is qualified, and otherwise, the product is unqualified.
Specifically, the horizontal measuring assembly 3 and the vertical measuring assembly 4 act simultaneously, or the horizontal measuring assembly 3 and the vertical measuring assembly 4 act sequentially, and in order to improve the measuring efficiency, the horizontal measuring assembly 3 and the vertical measuring assembly 4 usually act simultaneously; the present embodiment will be described by taking simultaneous operations as an example.
The measuring cylinders 31 of the horizontal measuring assembly 3 and the vertical measuring assembly 4 both act, and the measuring slide bar 32 moves radially 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 the outer wall of the product (such as points F and G in fig. 18).
During the movement of the measuring slide bar 32, the swing link 33 is driven to rotate around the pin shaft, the second end of the swing link 33 of the horizontal measuring component 3 is close to the horizontal tolerance probe component 5, and the second end of the swing link 33 of the vertical measuring component 4 is close to the vertical tolerance probe component 6. In this embodiment, the upper tolerance probe 53 of the horizontal tolerance probe assembly 5 and the vertical tolerance probe assembly 6 extend longer and the lower tolerance probe 54 extends shorter.
If the second end of the swing link 33 of the horizontal measurement component 3 is not connected to the upper tolerance probe 53 and the lower tolerance probe 54, or the second end of the swing link 33 of the vertical measurement component 4 is not connected to the upper tolerance probe 53 and the lower tolerance probe 54, it indicates that the outer diameter of the tested product size is greater than the upper tolerance size of the product, and the outer diameter of the product is not qualified.
If the second end of the swing link 33 of the horizontal measuring component 3 is connected with the upper tolerance probe 53 and is not connected with the lower tolerance probe 54; and the second end of the swing link 33 of the vertical measuring component 4 is connected with the upper tolerance probe 53 and is not connected with the lower tolerance probe 54; two show that the test product dimensions lie within the tolerance range; the outer diameter of the product is qualified. If only the horizontal measuring unit 3 or the vertical measuring unit 4 satisfies the condition of being connected to the lower tolerance probe 54 and not connected to the upper tolerance probe 53, the outer diameter of the product is still not qualified.
If the second end of the swing link 33 of the horizontal measurement component 3 is connected with both the upper tolerance probe 53 and the lower tolerance probe 54, or the second end of the swing link 33 of the vertical measurement component 4 is connected with both the upper tolerance probe 53 and the lower tolerance probe 54, it indicates that the outer diameter of the tested product size is smaller than the upper tolerance size of the product, and the outer diameter of the product is not qualified.
In summary, the outer diameter of the product is only qualified if either the horizontal measuring unit 3 or the vertical measuring unit 4 is connected to the upper tolerance probe 53 and not connected to the lower tolerance probe 54, otherwise, the outer diameter is not qualified.
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 when the outer diameter and the height are both qualified, the product is qualified. The embodiment can measure circular tube products with equal height and can also measure the outer diameter and the height of products with unequal height.
Of course, the second embodiment and the third embodiment may also be integrated, that is, the horizontal tolerance probe assemblies 5 are disposed on two sides of the second end of the swing link 33 of the horizontal measuring assembly 3, and the vertical tolerance probe assemblies 6 are disposed on two sides of the second end of the swing link 33 of the vertical measuring assembly 4; and after the inner diameter size is detected, the outer diameter is detected, and the height is synchronously detected.
Of course, the second embodiment and the third embodiment may be performed separately, and the height detection may be integrated with the inner diameter detection or the outer diameter detection.
The device and method in the above embodiments replace manual detection of critical dimensions of workpieces. In automatic production, a produced workpiece is clamped and placed in the device, and whether the inner diameter, the outer diameter and the height of a product are within the dimensional tolerance range of a qualified product is automatically detected; when the detected size is within the qualified tolerance range, the equipment sends out a product qualified signal, and the workpiece normally flows into the next procedure; and if the detected size is not within the qualified tolerance range, the equipment sends out an unqualified product signal, and the workpiece normally flows into an unqualified area to be detected. The efficiency is greatly improved, data reading is not needed, and only the qualification judgment is needed.
The above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding 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 components, a plurality of tolerance probe components, a positioning column and a positioning component, wherein the positioning column and the positioning component are used for clamping the circular tube product; the base is connected with the workbench, the positioning column is connected with the base and comprises at least three first channels which are arranged in the radial direction; the positioning assembly comprises a positioning sliding rod which is connected with the first channel in a sliding manner;
at least two measuring assemblies are arranged vertically to each other, and the measuring assemblies are connected with the workbench; the measuring assembly comprises a measuring sliding rod and a swinging rod, the measuring sliding rod can move along the radial direction, the measuring sliding rod is connected with the first channel in a sliding mode, the measuring sliding rod comprises at least two measuring blocks, the adjacent measuring blocks are arranged at intervals along the length direction of the measuring sliding rod, the middle part of the swinging rod is hinged to the base, one end of the swinging rod is movably connected with the measuring sliding rod, and the other end of the swinging rod extends to the side face of one tolerance probe assembly;
each tolerance probe assembly comprises an upper tolerance probe and a lower tolerance probe, and the upper tolerance probe and the lower tolerance probe are connected with the workbench.
2. The device for measuring the diameter of the round tube product by the cross method according to claim 1, wherein the outer circumference of the positioning column comprises at least two limiting convex edges, the positioning sliding rod comprises a positioning sliding block, and when the round tube product is fixed, the limiting convex edges and the positioning sliding block abut against the inner side surface of the round tube product.
3. The device for cross-method diameter measurement of circular tube products of claim 1, wherein the base comprises a second channel corresponding to the first channel, the bottom of the positioning slide bar and the bottom of the measuring slide bar are located in the second channel, and the measuring block is located in the first channel.
4. The device for measuring the diameter of the round tube product by the cross method according to claim 1, wherein the positioning assembly further comprises a positioning cylinder, the positioning cylinder is connected with the workbench, and a telescopic end of the positioning cylinder is connected with the positioning sliding rod.
5. The device for measuring the diameter of a round tube product by the cross method according to claim 1, wherein 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.
6. The device for measuring the diameter of a circular tube product by adopting a cross method according to claim 1, wherein the tolerance probe assembly further comprises a base and a locking member, 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 have the same structure, the upper tolerance probe comprises a probe tube, a return spring and a probe, one end of the probe tube is a blind end, the other end of the probe tube is an open end, the probe tube can be connected with the base in a sliding manner, the probe is connected with the open end of the probe tube, the return spring is located inside the probe tube, and two ends of the return spring are respectively abutted against the blind end of the probe tube and the probe.
7. The device for measuring the diameter of the circular tube product by the cross method according to claim 1, wherein two sides of one end of the oscillating bar connected with the measuring slide bar are arc-shaped, the hinged point of the oscillating bar and the base and the contact position of the oscillating bar and the tolerance probe assembly are long arm sections, the hinged point of the oscillating bar and the base and the contact position of the oscillating bar and the measuring slide bar are short arm sections, and the long arm section is more than 10 times of the short arm section.
8. The method for measuring the diameter of the round tube product by the cross method according to any one of the claims 1 to 7 is characterized by comprising the following steps:
Step S1: processing an upper tolerance checking fixture and a lower tolerance checking fixture, respectively placing the upper tolerance checking fixture and the lower tolerance checking fixture on the positioning column and clamping the upper tolerance checking fixture and the lower tolerance checking fixture, debugging the device, and determining the positions of the upper tolerance probe and the lower tolerance probe;
step S2: placing a product to be detected in a positioning column, and clamping the product through a positioning assembly;
step S3: when the inner diameter of a product is detected, the measuring assembly acts to drive the measuring slide bar to move until the measuring block is contacted with the inner wall of the product to be detected, and when the other ends of the swing rods of all the measuring assemblies are only contacted 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 measuring block to be in contact with the outer wall of the product to be detected, and when the other ends of the swing rods of all the measuring assemblies are only in contact with the upper tolerance probe, the product is qualified, otherwise, the product is unqualified.
9. The method for measuring the diameter of the round pipe product by the cross method according to claim 8, wherein in step S1, if the inner diameter of the product is detected, after an inner diameter upper tolerance gauge and an inner diameter lower tolerance gauge are respectively machined, the following steps are performed:
step S11, sleeving the tolerance gauge on the inner diameter into the positioning column, clamping the tolerance gauge by the positioning column and the positioning component, making the measuring component move simultaneously and contact with the inner wall of the product and then be fixed, and making the lower tolerance probe of the product contact with the swing rod and then be fixed;
Step S12, sleeving the inner diameter lower tolerance gauge into a positioning column, clamping by the positioning column and a positioning assembly, simultaneously moving the measuring assembly to be in contact with the inner wall of the product and then fixing an upper tolerance probe after the upper tolerance probe is in contact with the oscillating bar, and debugging the upper tolerance probe of the product;
if detect the product external diameter, process respectively on the external diameter tolerance examine utensil and the external diameter tolerance examine the utensil back down, carry out following step:
step S13, sleeving the tolerance gauge on the outer diameter into a positioning column, clamping by the positioning column and a positioning assembly, simultaneously moving the measuring assembly to be in contact with the outer wall of the product and then fixing an upper tolerance probe after the upper tolerance probe is in contact with the oscillating bar, and debugging the upper tolerance probe of the product;
and step S14, sleeving the outer diameter lower tolerance checking tool into the positioning column, clamping by the positioning column and the positioning component, simultaneously moving the measuring component to be in contact with the outer wall of the product and then fixing the lower tolerance probe after the measuring component is in contact with the oscillating bar, and debugging the lower tolerance probe of the product.
10. The method for measuring a diameter of a round tube product by a cross method according to claim 8, wherein in step S2, the positioning assembly and the measuring assembly are operated, the positioning slide bar and the measuring slide bar move more than 2mm toward the center of the circle along the first channel, the product to be measured is placed on the positioning column, the positioning assembly is operated, the positioning slide bar moves away from the center of the circle, and the positioning slide block contacts with the inner wall of the product to be measured, so as to clamp the product to be measured.
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