CN111964551A

CN111964551A - Bearing roller size and circular run-out detection device and use method

Info

Publication number: CN111964551A
Application number: CN202010767925.4A
Authority: CN
Inventors: 郑金芳
Original assignee: Lishui Zhiyuan Technology Co ltd
Current assignee: Shandong Zhaoyang Bearing Co ltd
Priority date: 2020-08-03
Filing date: 2020-08-03
Publication date: 2020-11-20
Anticipated expiration: 2040-08-03
Also published as: CN111964551B

Abstract

The invention provides a bearing roller size and circle run-out detection device, which comprises a base, wherein a V-shaped block is fixedly installed at the top of the base, a roller is placed at the groove of the V-shaped block, a first arc-shaped plate is attached to the outer side of the roller, a second arc-shaped plate is arranged on the side, away from the roller, of the first arc-shaped plate, a connecting plate is fixedly installed between the second arc-shaped plate and the first arc-shaped plate, and a barrel is fixedly installed on the first arc-shaped plate in an array mode, and the bearing roller size and circle run-: the device has the advantages of structural detection, simple and convenient operation, capability of simultaneously measuring the size precision and the circular runout error of the bearing roller, short measuring time, intuitive measuring result, capability of automatic measurement, capability of measuring only by mounting the roller on equipment, no need of operation of professionals, great improvement on the measuring efficiency, simple integral structure of the equipment, difficult damage and low cost, and further improvement on the production efficiency.

Description

Bearing roller size and circular run-out detection device and use method

Technical Field

The invention relates to the technical field of measuring equipment, in particular to a bearing roller size and circular run-out detection device and a using method thereof.

Background

At present, a rolling bearing is a precise mechanical element that changes sliding friction between a running shaft and a shaft seat into rolling friction, thereby reducing friction loss. The rolling bearing generally comprises four parts, namely an inner ring, an outer ring, a roller and a retainer, wherein the inner ring is used for being matched with a shaft and rotating together with the shaft; the outer ring is matched with the bearing seat to play a supporting role; the roller is uniformly distributed between the inner ring and the outer ring by means of the retainer, the roller is a core element in the rolling bearing, rolling friction exists between opposite moving surfaces due to the existence of the roller, the roller is an element bearing load when the bearing operates and is the weakest part in the roller bearing, the manufacturing quality of the roller bearing has great influence on the working performance (such as rotation precision, vibration, noise, flexibility and the like) of the bearing and is a main factor influencing the service life of the bearing, the size precision of the roller greatly determines the quality and durability of the bearing, so the size precision and the circular runout error of the roller need to be controlled very accurately, but the existing rolling bearing has low yield and poor durability, the reason is that the size of the roller is very inconvenient to measure and needs to be measured by professional measuring equipment, but the professional equipment is high in price, the operation is complicated, the measurement items are many, the measurement is time-consuming, and the operation needs professional personnel, so the method is not suitable for the common production and processing process.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides a bearing roller size and circle run-out detection device which can simultaneously measure the size precision and the circle run-out error of a bearing roller, has short measurement time, visual measurement result and automatic measurement, can measure the size precision and the circle run-out error only by mounting the roller on equipment, does not need professional operation, greatly improves the measurement efficiency, has simple integral structure, is not easy to damage, has low cost and further improves the production efficiency.

The invention adopts the technical scheme for solving the technical problems that: the bearing roller size and circular runout detection device comprises a base, wherein a V-shaped block is fixedly installed at the top of the base, a roller is placed at the groove of the V-shaped block, a first arc-shaped plate is attached to the outer side of the roller, a second arc-shaped plate is arranged on the first arc-shaped plate far away from the roller, a connecting plate is fixedly installed between the second arc-shaped plate and the first arc-shaped plate, cylinders are fixedly installed on the first arc-shaped plate in an array manner, the other ends of the cylinders penetrate through the second arc-shaped plate and are fixedly connected with the second arc-shaped plate, a telescopic rod is connected to the inner wall of the cylinder in a sliding manner, a first spring fixedly connected with one end of the cylinder far away from the roller is fixedly installed at one end of the telescopic rod, through holes are distributed on the first arc-shaped plate in an array manner, one end of the cylinder close to, the grating ruler is provided with a reading head near one end of the cylinder body, sliding grooves are symmetrically arranged at two sides of the inner wall of the cylinder body, extending sliding rods which penetrate through the sliding grooves and are fixedly connected with the reading head are fixedly arranged at two sides of the telescopic rod, a supporting plate which is positioned around the roller is fixedly arranged at the top of the base in an array mode, a sliding rod which penetrates through the supporting plate is connected onto the supporting plate in a sliding mode, a connecting plate is fixedly arranged at one end, close to the roller, of the sliding rod, a connecting rod which is fixedly connected with the second arc-shaped plate is symmetrically and fixedly arranged at one end, close to the roller, of the connecting plate, a second spring which surrounds the sliding rod is fixedly arranged between the connecting plate and the supporting plate, a first box body is fixedly arranged at one end, far away from the roller, of the, first bottom half fixed mounting have with backup pad and base fixed connection's second box, first box inner wall bottom fixed mounting has first pipe, first pipe passes inside extending to the second box behind the second box top, the second box is close to the inside fixed mounting of backup pad one end and has the second pipe, sealing connection has the third pipe between second pipe and the first pipe, third pipe intercommunication second pipe and first pipe, first pipe inner wall fixed mounting has the valve, second pipe inner wall fixed mounting has the check valve, second box inner wall sliding seal has the second push pedal that is located second pipe and first pipe below, the backup pad one end inner wall is kept away from to the second box is equipped with the air vent. The structure can measure the circle run-out and the size of the roller simultaneously, and the measuring device has two sets, can be matched with each other for measurement, improves the accuracy and can verify each other.

For further improvement, a first limiting ring positioned between the first guide pipe and the push plate is fixedly arranged on the inner wall of the first box body.

Further perfecting, second box inner wall fixed mounting has the second spacing ring that is located between second push pedal and the air vent.

Further perfection, the inside fixed mounting of base has the electro-magnet. This structure can adsorb ferromagnetic ball.

Further perfection, the inside of the base is symmetrically provided with a containing cavity, the inside of the containing cavity is fixedly provided with an air cylinder, an air cylinder output shaft passes through the inner wall at the top of the containing cavity and then reaches the upper part of the base, a return plate is fixedly arranged at the position of the air cylinder output shaft, the inside of the return plate is symmetrically provided with a first lead screw and a first auxiliary slide bar, the rear end of the first lead screw is rotatably connected with the inner wall at the rear end of the return plate, the front end of the first lead screw is provided with a first motor, the first motor is fixedly connected with the inner wall at the front end of the return plate, the front end and the rear end of the first auxiliary slide bar are fixedly connected with the inner walls at the front end and the rear end of the return plate, the outer side of the first lead screw is in threaded connection with a first fixing plate, the outer side of the first auxiliary slide bar is in sliding connection with a second fixing, the right end of the second lead screw is rotatably connected with the second fixing plate, the left end of the second lead screw is provided with a second motor fixedly connected with the first fixing plate, the second auxiliary sliding rod is fixedly connected with the first fixing plate and the second fixing plate, the outer side of the second lead screw is in threaded connection with a sliding plate, the sliding plate is in sliding connection with the second auxiliary sliding rod, the sliding plate is symmetrically and slidably connected with lifting rods penetrating through the sliding plate, the lifting rods are located between the second lead screw and the second auxiliary sliding rod, a first pressing plate for supporting the roller is fixedly installed at the bottom of each lifting rod, a second pressing plate is fixedly installed at the top of each lifting rod, third springs are fixedly installed at the top of each first pressing plate and the bottom of each sliding plate, and a pressure gauge for supporting the sliding plate at the top by a measuring.

A use method of a bearing roller size and circle run-out detection device comprises the following steps:

firstly, installation: filling liquid into the first box body and the second box body, clamping the roller between the first arc-shaped plates, enabling the first arc-shaped plates to be tightly attached to the roller, enabling the roller to abut against the V-shaped block, then closing the valve, starting the air cylinder to descend, enabling the first pressing plate to descend for a certain distance after contacting with the roller, enabling the third spring to be pressed, enabling the first pressing plate to ascend to drive the lifting rod to ascend, and enabling the lifting rod to pull a measuring head of the pressure gauge;

secondly, measurement: starting the second motor and the first motor, enabling the first pressing plate to be clung to the roller for irregular sliding, wherein the roller has a circle run-out error when rolling, the first pressing plate can be driven to ascend or descend when rolling, the real-time degree of the pressure gauge is recorded, the error of the roller can be visually seen by drawing a line graph, when the maximum diameter position of the roller rolls to the first arc-shaped plate, the first arc-shaped plate can be driven to move towards the direction of the supporting plate, the supporting plate drives the sliding rod to move when moving, the sliding rod drives the pushing plate to move, the pushing plate pushes liquid in the first box body out through the one-way valve, at the moment, the position of the sliding rod is fixed, when the roller rotates to the minimum diameter, the telescopic rod is pressed by the first spring to stretch out from the through hole to abut against the roller, when the telescopic rod stretches out, the reading head can be driven to move, the barrel that a plurality of arrays distribute can be different according to the telescopic link distance that stretches out, and then measures whether the size of roller accords with the regulation, and the numerical value of pressure gauge can carry out the comparison with the numerical value of grating chi, improves measurement accuracy when reducing the error to can verify each other.

The invention has the beneficial effects that: the device has the advantages of structural detection, simple and convenient operation, capability of simultaneously measuring the size precision and the circular runout error of the bearing roller, short measuring time, intuitive measuring result, capability of automatic measurement, capability of measuring only by mounting the roller on equipment, no need of operation of professionals, great improvement on the measuring efficiency, simple integral structure of the equipment, difficult damage and low cost, and further improvement on the production efficiency.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 is a partial enlarged view A of FIG. 1;

FIG. 4 is a partial enlarged view B of FIG. 1;

FIG. 5 is a schematic view of the structure of the V-block of the present invention;

fig. 6 is a schematic structural view of the first casing of the present invention.

Description of reference numerals: the device comprises a base 1, a V-shaped block 2, an electromagnet 3, a first fixed plate 4, a first auxiliary slide rod 5, a second fixed plate 6, a second lead screw 7, a first arc-shaped plate 8, a sliding plate 9, a third spring 10, a second pressing plate 11, a pressure gauge 12, a lifting rod 13, a first pressing plate 14, a second motor 15, a first lead screw 16, a clip plate 17, a first motor 18, a first limit ring 19, a push plate 20, a third guide pipe 21, a sliding rod 22, a second spring 23, a second guide pipe 24, a one-way valve 25, a second limit ring 26, a second box 27, a vent hole 28, a second push plate 29, a valve 30, a first guide pipe 31, a first box 32, a grating ruler 33, a sliding chute 34, a reading head 35, a cylinder 36, a connecting plate 37, a first spring 38, an extension slide rod 39, a telescopic rod 40, a connecting plate 41, a roller 42, a through hole 43, an air cylinder 44, an accommodating cavity 45, a second auxiliary slide rod 46, a second arcuate plate 48.

Detailed Description

The invention will be further described with reference to the accompanying drawings in which:

with reference to figures 1, 2, 3, 4, 5, 6: the bearing roller size and circular runout detection device in the embodiment comprises a base 1, wherein a V-shaped block 2 is fixedly mounted at the top of the base 1, a roller 42 is placed at the groove of the V-shaped block 2, a first arc-shaped plate 8 is attached to the outer side of the roller 42, a second arc-shaped plate 48 is arranged on the first arc-shaped plate 8 far away from the roller 42, a connecting plate 41 is fixedly mounted between the second arc-shaped plate 48 and the first arc-shaped plate 8, a barrel 36 is fixedly mounted on the first arc-shaped plate 8 in an array manner, the other end of the barrel 36 penetrates through the second arc-shaped plate 48 and is fixedly connected with the second arc-shaped plate, a telescopic rod 40 is slidably connected with the inner wall of the barrel 36, a first spring 38 fixedly connected with one end of the barrel 36 far away from the roller 42 is fixedly mounted at one end of the telescopic rod 40 far away from the roller 42, through holes 43 are distributed on the, the utility model discloses a reading device, including barrel 36, telescopic link 40, telescopic link 37, base 1, support plate 37, roller 42, second arc board 48, the barrel 36 both sides are equipped with grating scale 33, grating scale 33 and second arc board 48 fixed connection, grating scale 33 is close to barrel 36 one end and installs reading head 35, barrel 36 inner wall bilateral symmetry is equipped with

spout

34, 40 both sides fixed mounting of telescopic link has the extension slide bar 39 who passes behind the spout 34 and reading head 35 fixed connection, base 1 top array fixed mounting has the backup pad 47 that is located roller 42 all around, sliding connection has the slide bar 22 that passes backup pad 47 on the backup pad 47, slide bar 22 is close to roller 42 one end fixed mounting has connecting plate 37, connecting plate 37 is close to roller 42 one end symmetry fixed mounting have with second arc board 48 fixed connection's connecting rod 50, fixed mounting has second spring 23 around slide bar 22 between connecting plate 37 and the backup pad 47, roller, the other end of the sliding rod 22 passes through the first box body 32 and is close to one end of the supporting plate 47 and is connected with the supporting plate in a sliding and sealing manner, the other end of the sliding rod 22 is fixedly provided with a push plate 20 connected with the inner wall of the first box body 32 in a sliding and sealing manner, the bottom of the first box body 32 is fixedly provided with a second box body 27 fixedly connected with the supporting plate 47 and the base 1, the bottom of the inner wall of the first box body 32 is fixedly provided with a first guide pipe 31, the first guide pipe 31 passes through the top of the second box body 27 and then extends into the second box body 27, the second box body 27 is close to the inner part of one end of the supporting plate 47 and is fixedly provided with a second guide pipe 24, a third guide pipe 21 is fixedly connected between the second guide pipe 24 and the first guide pipe 31, the third guide pipe 21 is communicated with the second guide pipe 24 and the first guide pipe 31, the, the inner wall of the second box body 27 is connected with a second push plate 29 positioned below the second guide pipe 24 and the first guide pipe 31 in a sliding and sealing manner, the inner wall of one end, away from the supporting plate 47, of the second box body 27 is provided with a vent hole 28, the inner wall of the first box body 32 is fixedly provided with a first limit ring 19 positioned between the first guide pipe 31 and the push plate 20, the inner wall of the second box body 27 is fixedly provided with a second limit ring 26 positioned between the second push plate 29 and the vent hole 28, the base 1 is internally and fixedly provided with an electromagnet 3, the base 1 is internally and symmetrically provided with accommodating cavities 45, the accommodating cavities 45 are internally and fixedly provided with air cylinders 44, output shafts of the air cylinders 44 pass through the inner walls at the tops of the accommodating cavities 45 and reach the upper part of the base 1, output shafts of the air cylinders 44 are fixedly provided with return plates 17, the return plates 17 are internally and symmetrically provided with first lead screws 16 and first auxiliary slide, a first motor 18 is mounted at the front end of the first lead screw 16, the first motor 18 is fixedly connected with the inner wall of the front end of the return plate 17, the front end and the rear end of the first auxiliary slide bar 5 are fixedly connected with the inner walls of the front end and the rear end of the return plate 17, the outer side of the first lead screw 16 is in threaded connection with a first fixed plate 4, the outer side of the first auxiliary slide bar 5 is in sliding connection with a second fixed plate 6, a second lead screw 7 and a second auxiliary slide bar 46 are symmetrically arranged between the first fixed plate 4 and the second fixed plate 6, the second lead screw 7 and the second auxiliary slide bar 46 are horizontally aligned, the right end of the second lead screw 7 is in rotating connection with the second fixed plate 6, a second motor 15 fixedly connected with the first fixed plate 4 is mounted at the left end of the second lead screw 7, the second auxiliary slide bar 46 is fixedly connected with the first fixed plate 4 and the second fixed plate 6, and the outer side of, the sliding plate 9 is slidably connected with a second auxiliary sliding rod 46, the sliding plate 9 is symmetrically and slidably connected with a lifting rod 13 penetrating through the sliding plate 9, the lifting rod 13 is located between a second lead screw 7 and the second auxiliary sliding rod 46, a first pressing plate 14 abutting against a roller 42 is fixedly installed at the bottom of the lifting rod 13, a second pressing plate 11 is fixedly installed at the top of the lifting rod 13, a third spring 10 is fixedly installed at the top of the first pressing plate 14 and the bottom of the sliding plate 9, and a measuring head abutting against a pressure gauge 12 at the top of the sliding plate 9 is fixedly installed at the bottom of the second pressing plate 11.

With reference to figures 1, 2, 3, 4, 5, 6: a use method of a bearing roller size and circle run-out detection device comprises the following steps:

firstly, installation: filling liquid into the first box body 32 and the second box body 27, clamping the roller 42 between the first arc-shaped plates 8, enabling the first arc-shaped plates 8 to be tightly attached to the roller 42, enabling the roller 42 to abut against the V-shaped block 2, then closing the valve 30, starting the air cylinder 44 to descend, enabling the first pressing plate 14 to descend for a certain distance after contacting the roller 42, enabling the third spring 10 to be pressed, enabling the first pressing plate 14 to ascend to drive the lifting rod 13 to ascend, and enabling the lifting rod 13 to pull a measuring head of the pressure gauge 12;

secondly, measurement: the second motor 15 and the first motor 18 are started, so that the first pressing plate 14 is clung to the roller 42 to slide irregularly, because the roller 42 has a circular run-out error when rolling, the first pressing plate 14 is driven to ascend or descend when rolling, the real-time degree of the pressure gauge 12 is recorded, the error of the roller 42 can be visually seen by drawing a line graph, when the position of the maximum diameter of the roller 42 rolls to the first arc-shaped plate 8, the first arc-shaped plate 8 can be driven to move towards the supporting plate 47, the sliding rod 22 is driven to move when the supporting plate 47 moves, the sliding rod 22 moves to push the push plate 20, the push plate 20 pushes out the liquid in the first box body 32 through the one-way valve 25, at the moment, the position of the sliding rod 22 is fixed, when the roller 42 rotates to the minimum diameter, the telescopic rod 40 is pressed by the first spring 38 and extends out of the through hole 43 to abut against the roller 42, and when the telescopic rod 40, therefore, people can read out the circle run-out error of the roller 32 through the grating ruler 33, the plurality of the barrel bodies 36 distributed in an array can further measure whether the size of the roller 42 meets the specification according to different distances of the extending telescopic rods 40, the numerical value of the pressure gauge 12 can be compared with the numerical value of the grating ruler 33, the error is reduced, the measurement precision is improved, and mutual verification can be carried out.

While the invention has been shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the appended claims.

Claims

1. The utility model provides a bearing roller size and circle detection device that beats, includes base (1), characterized by: the roller-type vacuum cleaner is characterized in that a V-shaped block (2) is fixedly mounted at the top of the base (1), a roller (42) is placed at the groove of the V-shaped block (2), a first arc plate (8) is attached to the outer side of the roller (42), a second arc plate (48) is arranged on the side, away from the roller (42), of the first arc plate (8), a connecting plate (41) is fixedly mounted between the second arc plate (48) and the first arc plate (8), a barrel body (36) is fixedly mounted on the first arc plate (8), the other end of the barrel body (36) penetrates through the second arc plate (48) and is fixedly connected with the second arc plate, a telescopic rod (40) is slidably connected to the inner wall of the barrel body (36), a first spring (38) fixedly connected with one end, away from the roller (42), of the telescopic rod (40) is fixedly mounted at one end, away from the roller (42), of the barrel body (36), and through, barrel (36) are close to roller (42) one end and through-hole (43) intercommunication, barrel (36) both sides are equipped with grating chi (33), grating chi (33) and second arc (48) fixed connection, grating chi (33) are close to barrel (36) one end and install reading head (35), barrel (36) inner wall bilateral symmetry is equipped with spout (34), telescopic link (40) both sides fixed mounting have pass behind spout (34) with reading head (35) fixed connection's extension slide bar (39), base (1) top array fixed mounting has backup pad (47) that are located roller (42) all around, sliding connection has slide bar (22) that pass backup pad (47) on backup pad (47), slide bar (22) are close to roller (42) one end fixed mounting and have connecting plate (37), connecting plate (37) are close to roller (42) one end symmetry fixed mounting and have the connecting rod with second arc (48) fixed connection (50) A second spring (23) surrounding the sliding rod (22) is fixedly mounted between the connecting plate (37) and the supporting plate (47), the supporting plate (47) is far away from one end of the roller (42) and is fixedly provided with a first box body (32), the other end of the sliding rod (22) penetrates through the first box body (32) to be close to one end of the supporting plate (47) and is connected with the sliding seal, the other end of the sliding rod (22) is fixedly provided with a push plate (20) connected with the inner wall of the first box body (32) in a sliding seal manner, the bottom of the first box body (32) is fixedly provided with a second box body (27) fixedly connected with the supporting plate (47) and the base (1), the bottom of the inner wall of the first box body (32) is fixedly provided with a first guide pipe (31), the first guide pipe (31) penetrates through the top of the second box body (27) and then extends into the second box body (27), and the second box body (27) is close to one, sealing connection has third pipe (21) between second pipe (24) and first pipe (31), third pipe (21) intercommunication second pipe (24) and first pipe (31), first pipe (31) inner wall fixed mounting has valve (30), second pipe (24) inner wall fixed mounting has check valve (25), second box (27) inner wall sliding seal is connected with second push pedal (29) that are located second pipe (24) and first pipe (31) below, backup pad (47) one end inner wall is kept away from in second box (27) is equipped with air vent (28).

2. The bearing roller size and run-out detection apparatus of claim 1, wherein: and a first limiting ring (19) positioned between the first guide pipe (31) and the push plate (20) is fixedly arranged on the inner wall of the first box body (32).

3. The bearing roller size and run-out detection apparatus of claim 1, wherein: and a second limiting ring (26) positioned between a second push plate (29) and the vent hole (28) is fixedly arranged on the inner wall of the second box body (27).

4. The bearing roller size and run-out detection apparatus of claim 1, wherein: an electromagnet (3) is fixedly arranged in the base (1).

5. The bearing roller size and run-out detection apparatus of claim 1, wherein: the inner symmetry of the base (1) is provided with a containing cavity (45), the inner fixed mounting of the containing cavity (45) is provided with a cylinder (44), an output shaft of the cylinder (44) passes through the inner wall of the top of the containing cavity (45) and then reaches the top of the base (1), the output shaft of the cylinder (44) is fixedly provided with a return plate (17), the inner symmetry of the return plate (17) is provided with a first lead screw (16) and a first auxiliary slide bar (5), the rear end of the first lead screw (16) is rotatably connected with the inner wall of the rear end of the return plate (17), the front end of the first lead screw (16) is provided with a first motor (18), the first motor (18) is fixedly connected with the inner wall of the front end of the return plate (17), the front end of the first auxiliary slide bar (5) is fixedly connected with the inner walls of the front end and the rear end of the return plate (17), the outer side of, a second fixing plate (6) is connected to the outer side of the first auxiliary sliding rod (5) in a sliding manner, a second lead screw (7) and a second auxiliary sliding rod (46) are symmetrically arranged between the first fixing plate (4) and the second fixing plate (6), the second lead screw (7) and the second auxiliary sliding rod (46) are horizontally aligned, the right end of the second lead screw (7) is rotatably connected with the second fixing plate (6), a second motor (15) fixedly connected with the first fixing plate (4) is installed at the left end of the second lead screw (7), the second auxiliary sliding rod (46) is fixedly connected with the first fixing plate (4) and the second fixing plate (6), a sliding plate (9) is connected to the outer side of the second lead screw (7) in a threaded manner, the sliding plate (9) is connected with the second auxiliary sliding rod (46) in a sliding manner, and lifting rods (13) penetrating through the sliding plate (9) are symmetrically and slidably connected to the sliding plate (9) on the, lifter (13) are located between second lead screw (7) and the supplementary slide bar of second (46), lifter (13) bottom fixed mounting has first clamp plate (14) of propping roller (42), lifter (13) top fixed mounting has second clamp plate (11), first clamp plate (14) top and sliding plate (9) bottom fixed mounting have third spring (10), second clamp plate (11) bottom fixed mounting has pressure gauge (12) that the measuring head propped sliding plate (9) top.

6. A method of using the bearing roller size and run-out detection apparatus of claim 1, comprising the steps of:

firstly, installation: liquid is filled in the first box body (32) and the second box body (27), the roller (42) is clamped between the first arc-shaped plates (8), the first arc-shaped plates (8) are tightly attached to the roller (42), the roller (42) is abutted to the V-shaped block (2), then the valve (30) is closed, the air cylinder (44) is started to descend, the first pressing plate (14) descends a certain distance after contacting the roller (42), the third spring (10) is pressed, the first pressing plate (14) ascends to drive the lifting rod (13) to ascend, and the lifting rod (13) pulls a measuring head of the pressure gauge (12);

secondly, measurement: the second motor (15) and the first motor (18) are started, so that the first pressing plate (14) is clung to the roller (42) to slide irregularly, the roller (42) has a circular jumping error during rolling, the first pressing plate (14) is driven to ascend or descend during rolling, the real-time degree of the pressure gauge (12) is recorded, the error of the roller (42) can be visually seen by drawing a line graph, when the position with the maximum diameter of the roller (42) rolls to the first arc-shaped plate (8), the first arc-shaped plate (8) can be driven to move towards the direction of the supporting plate (47), the sliding rod (22) is driven to move when the supporting plate (47) moves, the sliding rod (22) moves to push the push plate (20), the liquid in the first box body (32) is pushed out through the one-way valve (25) by the push plate (20), the position of the sliding rod (22) is fixed at the moment, when the roller (42) rotates to the minimum diameter, the telescopic rod (40) is pressed by the first spring (38) and extends out of the through hole, support roller (42), telescopic link (40) can drive reading head (35) when stretching out and remove, thereby people can read out the circle run-out error of roller (32) through grating chi (33), barrel (36) that a plurality of arrays distribute can be different according to telescopic link (40) distance that stretches out, and then measure whether the size of roller (42) accords with the regulation, the numerical value of pressure gauge (12) can be compared with the numerical value of grating chi (33), improve measurement accuracy when reducing the error, and can verify each other.