CN112504064A - Device for measuring overall dimension and assembly precision of V-shaped roller and using method thereof - Google Patents
Device for measuring overall dimension and assembly precision of V-shaped roller and using method thereof Download PDFInfo
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- CN112504064A CN112504064A CN202011128521.7A CN202011128521A CN112504064A CN 112504064 A CN112504064 A CN 112504064A CN 202011128521 A CN202011128521 A CN 202011128521A CN 112504064 A CN112504064 A CN 112504064A
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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
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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
- G01B5/20—Measuring arrangements characterised by the use of mechanical techniques for measuring contours or curvatures
Abstract
The invention relates to a device for measuring the overall dimension and the assembly precision of a V-shaped roller, which comprises a main ruler frame, wherein a left ruler and a right ruler which can be lifted are respectively arranged at two ends of the main ruler frame, length scales are respectively arranged on the left ruler and the right ruler, a V-shaped boss with a known angle is arranged in the middle of the main ruler frame, the V-shaped boss is of a bilaterally symmetrical structure, a fan-shaped annular dovetail groove is arranged on the V-shaped boss, an arc-shaped left angle ruler which slides leftwards and an arc-shaped right angle ruler which slides rightwards are arranged in the fan-shaped annular dovetail groove, a left angle ruler edge foot is arranged at the left side of the left angle ruler, a right angle ruler edge foot is arranged at the right side of the right angle ruler, angle scales are respectively arranged on the left angle ruler and the right angle ruler, and the intersection point of extension lines of the left angle ruler edge. The invention has high measuring precision, simple and safe operation, has the capability of measuring the overall dimension index of the V-shaped roller, ensures that the overall dimension and the assembly precision of the applied V-shaped roller meet the requirements, and provides guarantee for the adjustment of the flatness of the roller way.
Description
Technical Field
The invention relates to the technical field of precision detection, in particular to a device for measuring the outline dimension and the assembly precision of a V-shaped roller and a using method thereof.
Background
The quality detection of the round bar in the production of the round bar special steel is an essential step, the automatic ultrasonic detection of the round bar is generally carried out by adopting a spiral scanning mode that the round bar is linearly advanced by rotating the round bar through a sound field, the reliability of the detection mode is obviously influenced by the dynamic concentricity of the round bar and the rotating sound field, the dynamic concentricity refers to the concentricity of the round bar and the rotating sound field in the process of entering the rotating sound field, the dynamic concentricity of the round bar and the rotating sound field is influenced by the static concentricity and the linear advancing stability of the round bar, the static concentricity refers to the concentricity of the round bar and the rotating sound field in a static state, the V-shaped roller of the round bar enters the rotating sound field, the angle of the V-shaped roller generally influences the height of the round bar on the V-shaped roller, the linear advancing stability of the round bar depends on the shape size and the assembly precision, and the shape size and the assembly precision of the V-shaped roller determine whether the round bar swings or jumps on, therefore, the good overall dimension and the assembly precision of the V-shaped roller become the basic guarantee for stable and reliable detection. The V-shaped roller is easy to deform, so that the precision of the outline dimension is deteriorated, and the running stability of the round bar is seriously influenced by the V-shaped roller with an out-of-tolerance outline. Therefore, it is necessary to measure and screen the profile and mounting accuracy of the V-roll, but a complete and accurate measuring device for the V-roll is not available at present. In view of the above, it is necessary to provide a device for measuring V-roll, so as to measure the following external dimension indexes of V-roll: the angle of the V-shaped groove, the vertical symmetry of two sides of the V-shaped groove, the section roundness of the V-shaped roller, the virtual sharp bottom radius of the V-shaped groove, the assembly concentricity and the parallelism of a shaft hole and a shaft of the V-shaped roller and the like.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a device for measuring the overall dimension and the assembly precision of a V-shaped roller and a using method thereof, which have the advantages of high measurement precision, simplicity and safety in operation, capability of measuring the overall dimension index of the V-shaped roller, capability of ensuring that the overall dimension and the assembly precision of the V-shaped roller in use meet the requirements, and guarantee for the adjustment of the flatness of a roller way.
The technical purpose of the invention is realized by the following technical scheme:
the device for measuring the overall dimension and the assembly precision of the V-shaped roller comprises a main ruler frame, wherein a left ruler and a right ruler which can be lifted are respectively arranged at two ends of the main ruler frame, the left ruler and the right ruler are both provided with length scales, the middle of the main ruler frame is provided with a V-shaped boss with a known angle, the V-shaped boss is of a bilaterally symmetrical structure, be provided with fan annular dovetail on the V-arrangement boss, be equipped with gliding curved left angle chi left and gliding curved right angle chi right in the fan annular dovetail, the left side of left angle chi is equipped with left angle chi limit foot, left angle chi limit foot is located the radial direction of curved left angle chi, the right side of right angle chi is equipped with right angle chi limit foot, right angle chi limit foot is located the radial direction of curved right angle chi, left angle chi and right angle chi all are equipped with the angle scale, the nodical and the both ends bottom of main chi frame of the extension line of left angle chi limit foot and right angle chi limit foot are in on the same straight line.
In one embodiment, the V-shaped boss is provided with an arc-shaped step, the arc-shaped step is provided with a detachable sector-shaped angle square pressing block, the arc-shaped step of the V-shaped boss and the outer arc surface of the angle square pressing block form a sector-shaped dovetail groove, and the sector-shaped dovetail groove is detachable in structure and convenient to detach and replace the left ruler and the right ruler.
In one embodiment, the angle square pressing block is provided with a plurality of through holes, the arc-shaped step is provided with screw holes matched with the through holes, and the fixing bolt penetrates through the through holes and is in threaded connection with the screw holes to fix the angle square pressing block on the arc-shaped step.
In one embodiment, the left angle square is provided with an arc-shaped left butt joint part, the right angle square is provided with an arc-shaped right butt joint part, the left butt joint part is provided with a butt joint bulge, the right butt joint part is provided with a butt joint clamping groove matched with the butt joint bulge, and the butt joint bulge is embedded with the butt joint clamping groove to enable the left butt joint part and the right butt joint part to be connected in a sliding mode.
In one embodiment, ruler clamping grooves are formed in two ends of the main ruler frame respectively and are matched with the left ruler or the right ruler, ruler positioning bolts are arranged on the side faces of the ruler clamping grooves and fix the left ruler or the right ruler in the ruler clamping grooves.
The method for using the device for measuring the outer dimension and the assembly precision of the V-shaped roller comprises the following steps,
and (3) placing the main ruler frame above the V-shaped roller, adjusting the heights of the left ruler and the right ruler at two ends of the main ruler frame to enable the left ruler and the right ruler to be in contact with a roller of the V-shaped roller, aligning the V-shaped boss to the V-shaped groove of the V-shaped roller, and adjusting the angles of the left angle ruler and the right angle ruler on the V-shaped boss.
In one embodiment, the angle of the V-shaped groove of the V-shaped roller is measured, the main ruler frame is arranged above the V-shaped groove of the V-shaped roller opposite to the axis of the V-shaped roller, the V-shaped boss of the main ruler frame is close to the V-shaped groove of the V-shaped roller and extends out of the left angle ruler and the right angle ruler on the V-shaped boss, the left angle square side foot of the left angle square and the right angle square side foot of the right angle square are respectively attached to the groove edge of the V-shaped groove, the extending angle of the left angle square is read, the extending angle of the right angle square is read, the sum of the extending angle of the left angle square, the extending angle of the right angle square and the extending angle of the V-shaped boss is equal to the V-shaped angle value of the V-shaped groove in the position, the angles of the V-shaped grooves in different positions of the same V-shaped roller are measured, the V-shaped angle values in multiple positions of the same V-shaped roller are obtained, the deviation of the V-shaped angle values is calculated, the V-shaped roller with small deviation of the V-shaped angle values in all the positions is reserved, and the V-shaped roller with large deviation of the V.
In one embodiment, the vertical symmetry of two sides of a V-shaped groove is measured, a roller shaft of a V-shaped roller is horizontally placed, a main ruler frame is placed over the V-shaped groove of the V-shaped roller opposite to the axis of the V-shaped roller, a left angle ruler and a right angle ruler on a V-shaped boss are extended, so that a left angle ruler side foot of the left angle ruler and a right angle ruler side foot of the right angle ruler are respectively attached to the groove side of the V-shaped groove, the main ruler frame is adjusted to keep the upper edge of the main ruler frame horizontal, the extending angle of the left angle ruler is read, the extending angle of the right angle ruler is read, the difference between the extending angle of the left angle ruler and the extending angle of the right angle ruler is the V-shaped groove inclination angle, the smaller the V-shaped groove inclination angle is, the better the vertical symmetry of two sides of the V-shaped groove is measured, the inclination angles of the V-shaped grooves in different directions of the same V-shaped roller are obtained, the deviation of the V-shaped groove, and V-shaped rollers with larger deviation of the inclination angles of the V-shaped grooves in all directions are removed.
In one embodiment, the distance from the virtual pointed bottom of the V-shaped groove to the surface of the roller is measured, so that the left corner square edge foot of the left corner square and the right corner square edge foot of the right corner square are respectively attached to the groove edge of the V-shaped groove, the left ruler and the right ruler are respectively extended to be in contact with the surface of the roller, the extension length of the left ruler is read, the extension length of the right ruler is read, and the average value of the extension length of the left ruler and the extension length of the right ruler is the distance from the virtual pointed bottom of the V-shaped groove to the surface of the roller.
In one embodiment, the roundness of the section of the V-shaped roller, the parallelism and the concentricity of the assembly of the V-shaped roller and the roller are measured, the left angle square and the right angle square are respectively and fully attached to the V-shaped groove in one direction, the left ruler and the right ruler are respectively extended out to be in contact with the surface of the roller and keep continuous contact, the left ruler and the right ruler are adjusted to enable the extension lengths of the left ruler and the right ruler to be the same, the V-shaped roller is rotated to observe the contact condition of the left angle square and the right angle square with the groove edge of the V-shaped groove, if the left angle square or the right angle square and the V-shaped groove are simultaneously extruded or gaps are simultaneously generated, the roundness of the V-shaped groove is poor, if the left angle square or the right angle square and the V-shaped groove are non-uniformly extruded or non-uniform gaps are generated, the V-shaped groove is not parallel to the assembly of.
The invention has the following beneficial effects:
the V-shaped roller measuring device is simple in structure, simple and convenient to operate and complete in function, and can measure various overall dimension values of the V-shaped roller; the V-shaped roller mounting device is suitable for large specification range of V-shaped rollers, can measure the external dimensions and the assembly precision of V-shaped rollers of various specifications within a certain specification range through the left angle square and the right angle square, screens to ensure that the external shapes meet the requirements, provides basic guarantee for subsequent assembly of a conveying roller way and adjustment of straightness, and can measure the mounting precision of a hole shaft of the online applied V-shaped roller, thereby guiding the maintenance and adjustment of the mounting precision of the V-shaped roller.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the present invention for measuring the outer dimension and assembly accuracy of a V-roll.
In the figure: 1-main ruler frame, 2-V-shaped roller, 3-rolling shaft, 4-left ruler, 5-right ruler, 6-left angle ruler, 7-right angle ruler, 8-V-shaped boss, 9-angle ruler pressing block, 10-fixing bolt, 11-left angle ruler edge foot, 12-right angle ruler edge foot, 13-left butt joint part, 14-right butt joint part and 15-ruler positioning bolt.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
It should be noted that all the directional terms such as "upper" and "lower" referred to herein are used with respect to the view of the drawings, and are only for convenience of description, and should not be construed as limiting the technical solution.
As shown in fig. 1 and 2.
As shown in fig. 1, the device for measuring the overall dimension and the assembly precision of the V-shaped roller comprises a main ruler frame 1, wherein a left ruler 4 and a right ruler 5 which can be lifted are respectively arranged at two ends of the main ruler frame 1, the left ruler 4 and the right ruler 5 are both provided with length scales with the bottom end as a starting point, ruler clamping grooves are respectively arranged at two ends of the main ruler frame 1, the ruler clamping grooves are matched with the left ruler 4 or the right ruler 5, ruler positioning bolts 15 are arranged on the side surfaces of the ruler clamping grooves, and the left ruler 4 or the right ruler 5 is fixed in the ruler clamping grooves by the ruler positioning bolts 15, wherein the ruler clamping grooves are also provided with the length scales, the left ruler 4 or the right ruler 5 extends downwards, and the corresponding length value can be obtained by reading the length value extending from the left ruler 4 or the;
the middle of the main ruler frame 1 is provided with a V-shaped boss 8 with a known angle, the V-shaped boss 8 is of a bilateral symmetry structure, the V-shaped boss 8 is provided with an arc-shaped step in the thickness direction, a detachable fan-shaped angle square pressing block 9 is arranged on the arc-shaped step, the angle square pressing block 9 is provided with a plurality of through holes, the arc-shaped step is provided with screw holes matched with the through holes, a fixing bolt 10 penetrates through the through holes to be in threaded connection with the screw holes to fix the angle square pressing block 9 on the arc-shaped step, the arc-shaped step is of an inward concave inclined plane structure, the outer arc surface of the angle square pressing block 9 is of an inward concave inclined plane structure, the arc-shaped step of the V-shaped boss 8 and the outer arc surface of the angle square pressing block 9 form a fan-shaped annular dovetail groove, a left angle square 6 sliding leftwards and a right angle square 7 sliding rightwards are arranged in the fan-shaped annular dovetail groove, the depth, the left side of the left angle square 6 is provided with a left angle square edge foot 11, the left angle square edge foot 11 is positioned in the radial direction of the arc-shaped left angle square 6, namely the left angle square edge foot 11 is equivalent to the radius of the circle of the left angle square 6, the right side of the right angle square 7 is provided with a right angle square edge foot 12, the right angle square edge foot 12 is positioned in the radial direction of the arc-shaped right angle square 7, namely the right angle square edge foot 12 is equivalent to the radius of the circle of the right angle square 7, the left angle square 6 is provided with an angle scale with the left side as a starting point, the right angle square 7 is provided with an angle scale with the right side as a starting point, corresponding angle values can be obtained by reading the extending angle of the left angle square 6 or the right angle square 7, the arc curvature of the arc-shaped step, the arc curvature of the outer arc-shaped surface of the angle square pressing block 9, the arc curvature of the left angle square 6 and the arc curvature of the right angle square 7 are all the same, therefore, the circle center of the arc-shaped, The circle center of the circle where the left angle square 6 is located coincides with the circle center of the circle where the right angle square 7 is located, the intersection point of the extension lines of the left angle square side foot 11 and the right angle square side foot 12 is the circle center, no matter how the extension angle of the left angle square 6 or the right angle square 7 is adjusted, the intersection point of the extension lines of the left angle square side foot 11 and the right angle square side foot 12 is unchanged, and the intersection point and the bottoms of the two ends of the main square frame 1 are on the same straight line.
In this embodiment, the left square 6 is provided with an arc-shaped left butt joint portion 13, the right square 7 is provided with an arc-shaped right butt joint portion 14, the left butt joint portion 13 is provided with a butt joint protrusion, the right butt joint portion 14 is provided with a butt joint slot matched with the butt joint protrusion, the butt joint protrusion and the butt joint slot are embedded to enable the left butt joint portion 13 and the right butt joint portion 14 to be connected in a sliding mode, the left butt joint portion 13 is located below the sector annular dovetail groove, and the right butt joint portion 14 is located above the sector annular dovetail groove.
In the embodiment, the side surface of the inner arc surface of the arc step, which is contacted with the right angle square 7, is provided with vernier graduation scale from right to left, and the side surface of the outer arc surface of the angle square pressing block 9, which is contacted with the left angle square 6, is provided with vernier graduation scale from left to right.
The device for measuring the overall dimension and the assembly precision of the V-shaped roller can measure the angle of a V-shaped groove of the V-shaped roller 2, the vertical symmetry of two sides of the V-shaped groove, the distance from a virtual sharp bottom of the V-shaped groove to the surface of a rolling shaft 3, the section roundness of the V-shaped roller 2 and the parallelism and concentricity of the assembly of the V-shaped roller 2 and the rolling shaft 3.
As shown in FIG. 2, the method for using the device for measuring the outer dimension and the assembling accuracy of the V-roll 2 comprises the steps of,
measuring the angle of a V-shaped groove of a V-shaped roller 2, placing a main ruler frame 1 over the axis of the V-shaped roller 2 above the V-shaped groove of the V-shaped roller 2, enabling a V-shaped boss 8 of the main ruler frame 1 to be close to the V-shaped groove of the V-shaped roller 2, extending a left angle ruler 6 and a right angle ruler 7 on the V-shaped boss 8, enabling a left angle ruler edge leg 11 of the left angle ruler 6 and a right angle ruler edge leg 12 of the right angle ruler 7 to be respectively attached to the groove edge of the V-shaped groove, reading the extending angle of the left angle ruler 6, reading the extending angle of the right angle ruler 7, and measuring the extending angle of the V-shaped groove of the same V-shaped roller 2, obtaining the V-shaped angle values of a plurality of directions of the same V-shaped roller 2 and calculating the deviation of the V-shaped angle values because the angle of the V-shaped boss 8 is known, and (3) keeping the V-shaped rollers 2 with smaller deviation of V-shaped angle values in all directions, and rejecting the V-shaped rollers 2 with larger deviation of V-shaped angle values in all directions.
Measuring the vertical symmetry of two sides of a V-shaped groove, horizontally placing a rolling shaft 3 of a V-shaped roller 2, placing a main ruler frame 1 over the V-shaped groove of the V-shaped roller 2 just opposite to the axis of the V-shaped roller 2, extending a left angle ruler 6 and a right angle ruler 7 on a V-shaped boss 8, respectively attaching a left angle ruler side leg 11 of the left angle ruler 6 and a right angle ruler side leg 12 of the right angle ruler 7 to the groove side of the V-shaped groove, adjusting the main ruler frame 1 to keep the upper edge of the main ruler frame 1 horizontal, reading the extending angle of the left angle ruler 6, reading the extending angle of the right angle ruler 7, because the V-shaped boss 8 is a bilateral symmetry structure, the difference between the extending angle of the left angle ruler 6 and the extending angle of the right angle ruler 7 is the inclination angle of the V-shaped groove, the main ruler frame 1 is positioned above the V-shaped roller 2 and parallel to the rolling shaft 3 of the V-shaped roller 2, and the left angle ruler 6 and the right angle ruler 7 simultaneously extend to closely attach to the groove side of the, the extending angle of the left angle square 6 is close to the extending angle of the right angle square 7, if the vertical symmetry of the two sides of the V-shaped groove is poor, the extending angle of the left angle square 6 is different from the extending angle of the right angle square 7 greatly, so the smaller the angle of inclination of the V-shaped groove, the better the vertical symmetry of the two sides of the V-shaped groove, the angle of inclination of the V-shaped groove of different directions of the same V-shaped roller 2 is measured, the angle of inclination of the V-shaped groove of multiple directions of the same V-shaped roller 2 is obtained, the deviation of the angle of inclination of the V-shaped groove is calculated, the V-shaped roller 2 with smaller deviation of the angle of inclination of the V-shaped groove of each direction is reserved.
Measuring the distance from the virtual sharp bottom of the V-shaped groove to the surface of the roller 3, so that a left angle square side foot 11 of a left angle square 6 and a right angle square side foot 12 of a right angle square 7 are respectively attached to the groove edge of the V-shaped groove, because the left angle square side foot 11 and the right angle square side foot 12 are both attached to the groove edge of the V-shaped groove, the virtual sharp bottom of the V-shaped groove is superposed with the intersection point of the extension lines of the left angle square side foot 11 and the right angle square side foot 12, respectively extend out of the left ruler 4 and the right ruler 5 to be in surface contact with the roller 3, because the intersection point of the extension lines of the left angle square side foot 11 and the right angle square side foot 12 and the bottoms of the two ends of the main ruler frame 1 are on the same straight line, the extending length of the left ruler 4, the extending length of the right ruler 5, the length of the roller 3 between the left ruler 4 and the right ruler 5, and the length of the rollers at the bottoms of the two ends of the main ruler frame 1 form a right, therefore, the extension length of the left ruler 4 and the extension length of the right ruler 5 are read, and the average value of the extension lengths of the left ruler 4 and the right ruler 5 is the distance from the virtual bottom of the V-shaped groove to the surface of the roller 3.
Measuring the roundness of the section of the V-shaped roller 2 and the parallelism and concentricity of the assembly of the V-shaped roller 2 and the roller 3, adjusting a left angle square 6 and a right angle square 7 to be fully attached to the V-shaped groove in one direction, respectively extending out a left ruler 4 and a right ruler 5 to be in contact with the surface of the roller 3 and keep continuous contact, adjusting the left ruler 4 and the right ruler 5 to ensure that the extension lengths of the left ruler 4 and the right ruler 5 are the same, namely the upper edge of the main ruler frame 1 is kept parallel to the roller 3, rotating the V-shaped roller 2, observing the contact condition of the left angle square 6 and the right angle square 7 with the groove edge of the V-shaped groove, if the left angle square 6 or the right angle square 7 and the V-shaped groove simultaneously extrude or simultaneously generate a gap, indicating that the section of the V-shaped groove in the direction is different from the section of the V-shaped groove in the previous direction, indicating the poor roundness of the V-shaped groove, and if the left angle square, the V-shaped groove is not parallel to the assembly of the roller shaft 3, and the V-shaped roller 2 with the section out of roundness or not parallel to the assembly of the roller shaft 3 is readjusted or eliminated.
The invention has simple structure, simple and convenient operation and complete functions, and can measure all the appearance size values of the V-shaped roller 2; the invention is suitable for the V-shaped roller 2 with a large specification range, can measure the external dimensions and the assembly precision of the V-shaped rollers 2 with various specifications in a certain specification range through the left angle square 6 and the right angle square 7, screens and ensures that the external shapes meet the requirements, provides a basic guarantee for the subsequent assembly and the straightness adjustment of a conveying roller way, and can measure the hole shaft installation precision of the online applied V-shaped roller 2, thereby guiding the maintenance and adjustment of the installation precision of the adjusted V-shaped roller.
The invention can also be popularized and applied to the measurement of the external dimension and the assembly precision of various high-precision conveying V-shaped rollers 2, and the measuring device with different specification coverage ranges can be manufactured according to the specification of the V-shaped roller 2 to be measured, and is used for the measurement of the external dimension and the assembly precision of the V-shaped rollers 2 with various specifications.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
- The device for measuring the overall dimension and the assembly precision of the V-shaped roller is characterized by comprising a main ruler frame (1), wherein a left ruler (4) and a right ruler (5) which can be lifted are respectively arranged at two ends of the main ruler frame (1), length scales are respectively arranged on the left ruler (4) and the right ruler (5), a V-shaped boss (8) with a known angle is arranged in the middle of the main ruler frame (1), the V-shaped boss (8) is of a bilateral symmetry structure, a fan-shaped annular dovetail groove is arranged on the V-shaped boss (8), a left arc-shaped left angle ruler (6) sliding leftwards and a right arc-shaped right angle ruler (7) sliding rightwards are arranged in the fan-shaped dovetail groove, a left angle ruler edge foot (11) is arranged on the left side of the left angle ruler (6), the left angle ruler edge foot (11) is arranged in the radial direction of the left arc-shaped angle ruler (6), a right angle ruler edge foot (12) is arranged on the right side of the right angle ruler (7), and the right angle ruler edge foot (12) is arranged in the radial direction of, the left angle ruler (6) and the right angle ruler (7) are both provided with angle scales, and the intersection point of the extension lines of the left angle ruler side foot (11) and the right angle ruler side foot (12) and the bottoms of the two ends of the main ruler frame (1) are positioned on the same straight line.
- 2. The device for measuring the outer dimension and the assembly precision of the V-shaped roller according to claim 1, characterized in that the V-shaped boss (8) is provided with an arc-shaped step, the arc-shaped step is provided with a detachable fan-shaped angle square pressing block (9), and the arc-shaped step of the V-shaped boss (8) and the outer arc surface of the angle square pressing block (9) form a fan-shaped dovetail groove.
- 3. The apparatus for measuring the outer dimension and assembling accuracy of a V-roll according to claim 2, wherein the square pressure block (9) is provided with a plurality of through holes, the curved step is provided with screw holes for fitting the through holes, and the fixing bolts (10) are threaded through the through holes and the screw holes to fix the square pressure block (9) to the curved step.
- 4. The apparatus for measuring the outer dimension and assembly accuracy of a V-roll according to claim 1, wherein the left square (6) is provided with an arc-shaped left butt joint portion (13), the right square (7) is provided with an arc-shaped right butt joint portion (14), the left butt joint portion (13) is provided with a butt joint protrusion, the right butt joint portion (14) is provided with a butt joint groove matched with the butt joint protrusion, and the butt joint protrusion is engaged with the butt joint groove to slidably connect the left butt joint portion (13) and the right butt joint portion (14).
- 5. The V-shaped roller overall dimension and assembly accuracy measuring device as claimed in claim 1, characterized in that two ends of the main ruler frame (1) are respectively provided with a ruler clamping groove, the ruler clamping grooves are matched with the left ruler (4) or the right ruler (5), a ruler positioning bolt (15) is arranged on the side surface of each ruler clamping groove, and the ruler positioning bolt (15) fixes the left ruler (4) or the right ruler (5) in the ruler clamping grooves.
- The use method of the device for measuring the overall dimension and the assembly precision of the V-shaped roller is characterized in that a main ruler frame (1) is placed above the V-shaped roller (2), the heights of a left ruler (4) and a right ruler (5) at two ends of the main ruler frame (1) are adjusted, the left ruler (4) and the right ruler (5) are made to be in contact with a rolling shaft (3) of the V-shaped roller (2), a V-shaped boss (8) is aligned to a V-shaped groove of the V-shaped roller (2), and the angles of a left angle square (6) and a right angle square (7) on the V-shaped boss (8) are adjusted.
- 7. The method for using the device for measuring the outer dimension and the assembling accuracy of the V-roll according to claim 6, characterized in that the angle of the V-shaped groove of the V-roll (2) is measured, the main blade frame (1) is placed over the V-shaped groove of the V-roll (2) facing the axis of the V-roll (2), the V-shaped boss (8) of the main blade frame (1) is placed close to the V-shaped groove of the V-roll (2), the left square (6) and the right square (7) on the V-shaped boss (8) are protruded, so that the left square leg (11) of the left square (6) and the right square leg (12) of the right square (7) are respectively fitted to the groove sides of the V-shaped groove, the angle of the left square (6) is read, the angle of the right square (7) is read, the sum of the angle of the protruded angle of the left square (6), the protruded angle of the right square (7) and the angle of the V-shaped boss (8) is equal to the V-shaped groove angle value of the V-shaped groove orientation, the angles of V-shaped grooves in different directions of the same V-shaped roller (2) are measured to obtain V-shaped angle values of the same V-shaped roller (2) in multiple directions, the deviation of the V-shaped angle values is calculated, the V-shaped roller (2) with small deviation of the V-shaped angle values in all the directions is reserved, and the V-shaped roller (2) with large deviation of the V-shaped angle values in all the directions is removed.
- 8. The method for using a device for measuring the outer dimension and assembling accuracy of a V-roll according to claim 6, wherein the vertical symmetry of both sides of the V-groove is measured, the roller (3) of the V-roll (2) is horizontally placed, the main scale frame (1) is placed over the V-groove of the V-roll (2) facing the axis of the V-roll (2), the left square (6) and the right square (7) on the V-boss (8) are extended so that the left square leg (11) of the left square (6) and the right square leg (12) of the right square (7) respectively abut against the groove sides of the V-groove, the main scale frame (1) is adjusted to keep the upper edge of the main scale frame (1) horizontal, the extending angle of the left square (6) is read, the extending angle of the right square (7) is read, the difference between the extending angle of the left square (6) and the extending angle of the right square (7) is the inclined angle of the V-groove, the smaller the inclination angle of the V-shaped groove is, the better the vertical symmetry of two sides of the V-shaped groove is, the V-shaped groove inclination angles of different directions of the same V-shaped roller (2) are measured, the V-shaped groove inclination angles of a plurality of directions of the same V-shaped roller (2) are obtained, the deviation of the V-shaped groove inclination angles is calculated, the V-shaped roller (2) with smaller deviation of the V-shaped groove inclination angles in all directions is reserved, and the V-shaped roller (2) with larger deviation of the V-shaped groove inclination angles.
- 9. The use method of the device for measuring the outer dimension and the assembling accuracy of the V-shaped roller as claimed in claim 6, wherein the distance from the virtual bottom of the V-shaped groove to the surface of the roller (3) is measured so that the left square leg (11) of the left square (6) and the right square leg (12) of the right square (7) respectively fit the groove sides of the V-shaped groove, the left square leg (4) and the right square leg (5) respectively extend out to contact the surface of the roller (3), the extension length of the left square leg (4) is read, the extension length of the right square leg (5) is read, and the average value of the extension length of the left square leg (4) and the extension length of the right square leg (5) is the distance from the virtual bottom of the V-shaped groove to the surface of the roller (3).
- 10. The method for using the device for measuring the outer dimension and the assembling accuracy of a V-shaped roller according to claim 6, wherein the roundness of the section of the V-shaped roller (2), the parallelism and the concentricity of the assembly of the V-shaped roller (2) and the roller (3) are measured, the left square (6) and the right square (7) are respectively adjusted to be sufficiently fitted to the V-shaped groove in one direction, the left ruler (4) and the right ruler (5) are respectively extended to be in contact with the surface of the roller (3) and kept in continuous contact with the surface, the left ruler (4) and the right ruler (5) are adjusted so that the extended lengths of the left ruler (4) and the right ruler (5) are the same, the V-shaped roller (2) is rotated, the contact condition of the left square (6) and the right square (7) with the V-shaped groove side is observed, and if the left square (6) or the right square (7) and the V-shaped groove are simultaneously extruded or simultaneously generate a gap, the roundness of the V-, if the left angle square (6) or the right angle square (7) and the V-shaped groove generate uneven extrusion or generate uneven gaps, the V-shaped groove is not parallel to the assembly of the roller (3), and the V-shaped roller (2) with the section out of roundness or not parallel to the assembly of the roller (3) is readjusted or eliminated.
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