Round cover separation coaxiality detection device and detection method thereof

Abstract

The invention discloses a circular cover separation coaxiality detection device and a detection method thereof, and aims to provide a device which can realize quantitative detection of the coaxiality of an inner hole of a cover leakage seat and a positioning hole of a conveyor belt so as to accurately adjust the coaxiality of the inner hole of the cover leakage seat and the positioning hole of the conveyor belt. And the stability and the reliability of the lower cover are improved. The circular cover separation coaxiality detection device comprises a core sleeve; the core shaft is rotationally arranged in the core sleeve, the core shaft can slide along the core sleeve, and an axial hole is formed in the core shaft; the tensioning mechanism is used for tensioning and fixing the core sleeve in the inner hole of the drain cover seat; the dial indicator is arranged at the upper end of the mandrel; the measuring assembly comprises a floating rod arranged in the axial hole in a sliding mode, a measuring sliding block arranged at the lower end of the mandrel in a sliding mode in the radial direction of the mandrel, a driving piece driving the measuring sliding block to move and a measuring head rotationally arranged on a measuring head sliding block, and the measuring head is in linkage with a measuring head of the dial indicator through the floating rod.

Description

Technical Field

[0001] The invention relates to the field of circular cover splitting, and in particular to a circular cover splitting coaxiality detection device and a detection method thereof. Background Art

[0002] In the metal packaging industry, canned food and other food packaging use a large number of easy-open lid packaging, resulting in a large amount of easy-open lids, which is a large-scale industrial production. When producing easy-open lids, the stacked lid blanks (the lid blanks are stacked from bottom to top in the inner hole of the lid-leaking seat of the lid-separating device) need to be divided into pieces and sent into the positioning holes of the conveyor belt, and then sent step by step by the conveyor belt into the forming molds of each station for riveting, scoring, riveting pull rings and other forming. When the production line is running fast, whether the cover blanks can be stably and reliably separated into the positioning holes of the conveyor belt one by one is the key to whether the easy-open cover can be produced normally; and the coaxiality accuracy between the center of the cover seat of the cover separation device and the positioning hole of the conveyor belt directly determines the accuracy of the cover blanks being separated into the positioning holes of the conveyor belt when separating the covers. The better the coaxiality, the more accurate the cover separation and the more stable the production. On the contrary, if the coaxiality is not good, the cover blanks are easily separated obliquely, resulting in the cover blanks being unable to fall into the positioning holes to complete the positioning. In the mildest case, the cover blanks are deformed by the workstation mold, and in the worst case, the cover is stuck and damages the conveyor belt, machines and other equipment.

[0003] At present, the coaxiality between the cover separation device and the flexible belt hole cannot be detected because the conveyor belt is made of rubber material and its flexible hole wall cannot be detected. The current alignment method is to make a stepped alignment core rod according to the diameter of the positioning hole of the drain cover seat and the conveyor belt, and use this alignment core rod to insert from the drain cover seat hole and then insert it into the flexible positioning hole for alignment; at present, this method often has the problem of poor coaxial alignment accuracy between the inner hole of the drain cover seat and the positioning hole of the conveyor belt, and the alignment operation is difficult. Specifically, if the centering core rod and the inner hole of the drain cover seat fit too tightly, it is difficult to move the core rod and the alignment operation is difficult; if the centering core rod and the inner hole of the drain cover seat fit too loosely, the alignment accuracy will be poor, resulting in poor coaxiality between the inner hole of the drain cover seat and the positioning hole of the conveyor belt; on the other hand, when the centering core rod is inserted into the positioning hole of the flexible conveyor belt, is it inserted naturally or inserted through the deformation of the conveyor belt (if inserted through the deformation of the conveyor belt, the coaxiality between the inner hole of the drain cover seat and the positioning hole of the conveyor belt is poor)? Due to space limitations, it is impossible to observe and can only be evaluated by the operator's feeling and judgment, so the effect is not good, and repeated adjustments and verifications are required, which is labor-intensive and time-consuming, and the alignment operation is difficult. Summary of the invention

[0004] The purpose of the present invention is to overcome the problem that the flexible positioning hole is difficult to measure, and to provide a circular cover coaxiality detection device and detection method that can realize quantitative detection of the coaxiality between the inner hole of the leaky cover seat and the positioning hole of the conveyor belt, so as to accurately adjust the coaxiality between the inner hole of the leaky cover seat and the positioning hole of the conveyor belt, and improve the stability and reliability of the lower cover.

[0005] The technical solution of the present invention is: A circular cover coaxiality detection device, comprising: Core sleeve; A core shaft is rotatably arranged in the core sleeve and can slide along the core sleeve, and an axial hole is arranged in the core shaft; A tensioning mechanism, which tensions and fixes the core sleeve in the inner hole of the drain cover seat, and the core shaft is coaxial with the inner hole of the drain cover seat; A dial indicator is arranged at the upper end of the mandrel, with the probe of the dial indicator facing the axial hole; The measuring assembly includes a floating rod slidably set in the axial hole, a measuring slider slidably set at the lower end of the core shaft along the radial direction of the core shaft, a driving member for driving the measuring slider to move, and a measuring head rotatably set on the probe slider. The measuring head is linked to the side head of the dial indicator through the floating rod. During the rotation of the measuring head, the floating rod triggers the probe of the dial indicator. The specific use method of the circular cover sub-cover coaxiality detection device of the present scheme refers to the circular cover sub-cover coaxiality detection method described below, which adopts the core shaft to rotate at least 360 degrees. During this process, if the core shaft and the orifice measuring snare are not coaxial, the measuring head will rotate, thereby triggering the probe of the dial indicator through the floating rod. In this way, the coaxiality of the leaking cover seat and the orifice measuring snare can be measured by the reading of the dial indicator, thereby realizing the quantitative detection of the coaxiality of the inner hole of the leaking cover seat and the positioning hole of the conveyor belt; if the reading of the dial indicator falls within the set range, it means that the coaxiality is qualified; if the reading of the dial indicator exceeds the set range, it means that the coaxiality is unqualified. If the coaxiality is unqualified, the position of the leaking cover seat is moved, and then the coaxiality is measured again until the maximum reading of the sub-meter falls within the set range; thereby accurately adjusting the coaxiality of the inner hole of the leaking cover seat and the positioning hole of the conveyor belt, effectively improving the stability and reliability of the lower cover.

[0006] Preferably, the measuring head includes a measuring rod and a push rod, a push plate is provided at the lower end of the floating rod, and the push rod is located below the push plate. The push rod can abut against the push plate and lift up the push plate during the rotation of the push rod. In this way, during the process of measuring the coaxiality, the measuring rod abuts against the inner wall of the orifice measuring trap, and the push rod abuts against the push plate and lifts up the push plate; during the rotation of the mandrel, if the mandrel and the orifice measuring trap are not coaxial, the measuring rod will drive the measuring head to rotate, so that the push rod lifts the push plate and the floating rod to trigger the measuring head of the dial indicator.

[0007] Preferably, the measuring assembly further comprises a spring, a limiting portion is provided on the measuring slide block, and the top plate moves downward under the action of the spring and abuts against the limiting portion.

[0008] Preferably, the tensioning mechanism comprises: A tensioning sleeve is sleeved outside the core sleeve, and a conical surface is provided on the outer side of the core sleeve; A tensioning nut threadably connected to the core sleeve and located above the tensioning sleeve; The tensioning assembly includes a plurality of guide holes distributed in sequence on the tensioning sleeve in the circumferential direction, a tensioning block slidably arranged in each guide hole, and an elastic ring surrounding the outside of each tensioning block. The tensioning block is provided with an inclined surface that matches the conical surface, and the elastic ring provides elastic force (the elastic ring provides a centripetal elastic force) so that the inclined surface of the tensioning block is closely attached to the conical surface. In this way, the tensioning sleeve and the tensioning block can be pushed to move by tightening the tensioning nut, so that the tensioning block cooperates with the conical surface to push out each tensioning block, thereby realizing the tensioning and fixing of the core sleeve in the inner hole of the drain cover seat through the tensioning mechanism, realizing automatic alignment, and making the core shaft coaxial with the inner hole of the drain cover seat.

[0009] Preferably, a slot is provided on the outer side of the tension block, and the elastic ring is limited in the slot. In this way, the elastic ring can be limited by the slot to ensure that the elastic ring holds the inclined surface of the tension block tightly against the conical surface.

[0010] Preferably, the elastic ring is an elastic rubber ring or an elastic metal clamping ring.

[0011] Preferably, the upper sleeve of the mandrel is provided with a limit sleeve, and the limit sleeve is provided with a set screw, and the set screw locks the limit sleeve on the mandrel, and the limit sleeve is located above the core sleeve. In this way, when the position of the measuring head needs to be adjusted, the position of the measuring head can be adjusted by loosening the set screw and then moving the mandrel. After the position of the measuring head is adjusted, the limit sleeve is locked and fixed on the mandrel by tightening the set screw, and then the mandrel and the measuring assembly are supported on the top of the core sleeve by the limit sleeve; and after tightening the set screw, the rotation of the mandrel is not affected.

[0012] Preferably, a bearing is sleeved on the mandrel, and the bearing is located between the limiting sleeve and the core sleeve. In this way, after tightening the set screw, the rotation of the mandrel will not be affected, and the mandrel can rotate easily.

[0013] Preferably, a mounting seat is provided at the lower end of the core shaft, a slide groove is provided on the mounting seat and extends radially along the core shaft, a measuring slider is slidably arranged in the slide groove, and a driving member includes a driving bolt which is arranged on the mounting seat and drives the measuring slider to slide.

[0014] As a preference, it also includes an orifice measuring snare, whose inner hole is coaxial with the outer circle. When testing the coaxiality, the orifice measuring snare is placed in the positioning hole on the conveyor belt, and its outer circle diameter is matched with the positioning hole without clearance, so that the rigid inner hole of the orifice measuring snare replaces the unmeasurable flexible positioning hole of the conveyor belt, making the unmeasurable become measurable.

[0015] A circular cover sub-cover coaxiality detection method using a circular cover sub-cover coaxiality detection device comprises the following steps: First, place an orifice measurement snare into the positioning hole on the conveyor belt; The circular cover sub-cover coaxiality detection device is installed, the core sleeve is placed in the drain cover seat, and the core sleeve is tightened and fixed in the inner hole of the drain cover seat through the tensioning mechanism. At this time, the core shaft is coaxial with the inner hole of the drain cover seat; Second, the position of the measuring head is adjusted. The core shaft is moved downward along the core sleeve so that the measuring head is located in the inner hole of the orifice measuring ring. Then, the driving member drives the measuring head slider to move so that one end of the measuring head is against the inner wall of the orifice measuring ring, and drives the measuring head to rotate so that the floating rod triggers the measuring head of the dial indicator. Third, measure the coaxiality. Rotate the mandrel at least 360 degrees and use the dial indicator reading to measure the coaxiality of the drain cover seat and the orifice measuring snare.

[0016] If the reading of the dial indicator falls within the set range, it means that the coaxiality is qualified; If the reading of the dial indicator exceeds the set range, it means that the coaxiality is unqualified. If the coaxiality is unqualified, move the position of the drain cover seat according to the measured value and the offset direction, and then return to the third step to measure the coaxiality again until the maximum reading of the dial indicator falls within the set range. In this way, the coaxiality of the drain cover seat and the orifice measuring trap can be measured by the reading of the dial indicator, thereby realizing the quantitative detection of the coaxiality of the inner hole of the drain cover seat and the positioning hole of the conveyor belt; at the same time, the coaxiality of the inner hole of the drain cover seat and the positioning hole of the conveyor belt can be accurately adjusted to effectively improve the stability and reliability of the lower cover.

[0017] The beneficial effects of the present invention are: it can realize the quantitative detection of the coaxiality of the inner hole of the drain cover seat and the positioning hole of the conveyor belt, can indicate the offset amount and the offset direction, so as to accurately adjust the coaxiality of the inner hole of the drain cover seat and the positioning hole of the conveyor belt, and improve the stability and reliability of the lower cover; it can effectively solve the current problem of poor coaxiality between the inner hole of the drain cover seat and the positioning hole of the conveyor belt, and the inefficiency of the trial and error method of repeated adjustment and startup verification, thereby improving the startup reliability and reducing the defective rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional structural schematic diagram of a circular cover segment coaxiality detection device of the present invention.

[0019] Figure 2 It is a schematic diagram of a partial cross-sectional structure of a measuring component of a circular cover segment coaxiality detection device of the present invention.

[0020] Figure 3 It is a partial structural schematic diagram of the circular cover segment coaxiality detection device of the present invention during practical application.

[0021] In the figure: Core sleeve 1, conical surface 1.1; Mandrel 2; Dial indicator 3, probe 3.1; Tensioning sleeve 4.1, tensioning nut 4.2, tensioning assembly 4.3, tensioning block 4.31, elastic ring 4.32; Measuring assembly 5, floating rod 5.1, measuring slide block 5.2, measuring head 5.3, measuring rod 5.31, ejector rod 5.32, driving member 5.4, driving bolt 5.41, annular sleeve 5.42, ejector plate 5.5, spring 5.6, travel limiter 5.7, step surface 5.8; Limit sleeve 6; Bearing 7; Set screw 8; Locking bolt 9; Conveyor belt 10; Orifice measurement snare 11; Drain cover seat 12. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: Specific embodiment 1, as Figure 1 , Figure 2 , Figure 3 As shown, a circular cover coaxiality detection device includes a core sleeve 1, a core shaft 2, a dial indicator 3, a tensioning mechanism and a measuring component 5.

[0023] The core shaft 2 is rotatably arranged in the core sleeve 1, and the core shaft 2 can slide along the core sleeve 1. In this embodiment, the core sleeve 1 and the core shaft 2 are coaxially distributed. An axial hole is provided in the core shaft 2. The axial hole extends along the axial direction of the core shaft 2 and passes through both ends of the core shaft 2.

[0024] The tensioning mechanism is arranged on the core sleeve 1, and is used to tension and fix the core sleeve 1 in the inner hole of the drain cover seat 12. When the tensioning mechanism tensions and fixes the core sleeve 1 in the inner hole of the drain cover seat 12, the core shaft 2 is coaxial with the inner hole of the drain cover seat 12. The inner hole of the drain cover seat 12 is a circular hole.

[0025] The dial gauge 3 is arranged at the upper end of the mandrel 2. The probe of the dial gauge 3 is arranged downward. The probe of the dial gauge 3 faces the axial hole.

[0026] The measuring assembly 5 comprises a floating rod 5.1 slidably arranged in the axial hole, a measuring slider 5.2 slidably arranged at the lower end of the mandrel 2, a driving member 5.4 driving the measuring slider 5.2 to move, and a measuring head 5.3 arranged on the measuring head slider through a rotating shaft. The measuring slider 5.2 slides radially along the mandrel 2. The measuring head 5.3 is linked with the side head of the dial gauge 3 through the floating rod 5.1. When the measuring head 5.3 rotates around the rotating shaft, the floating rod 5.1 triggers the measuring head of the dial gauge 3.

[0027] The specific method of using the circular cover sub-cover coaxiality detection device of this embodiment refers to the circular cover sub-cover coaxiality detection method described below, which adopts the core shaft 2 to rotate 360 ​​degrees. During this process, if the core shaft 2 is not coaxial with the orifice measuring snare 11, the measuring head 5.3 will rotate (the measuring head 5.3 will rotate around its rotation axis), thereby triggering the measuring head of the dial indicator 3 through the floating rod 5.1. In this way, the coaxiality of the leaking cover seat 12 and the orifice measuring snare 11 can be measured through the maximum reading of the dial indicator 3, thereby realizing the leaking cover seat 12 Quantitative detection of the coaxiality between the inner hole and the positioning hole of the conveyor belt 10; if the maximum reading of the dial indicator 3 falls within the set range, it means that the coaxiality is qualified; if the maximum reading of the dial indicator 3 exceeds the set range, it means that the coaxiality is unqualified. If the coaxiality is unqualified, move the position of the drain cover seat 12 according to the data and direction during measurement, and then measure the coaxiality again until the maximum reading of the dial indicator falls within the set range; thereby accurately adjusting the coaxiality of the inner hole of the drain cover seat 12 and the positioning hole of the conveyor belt 10, effectively improving the stability and reliability of the lower cover.

[0028] Specific embodiment 2, as Figure 1 , Figure 2 , Figure 3 As shown, a circular cover coaxiality detection device includes a core sleeve 1, a core shaft 2, a dial indicator 3, a tensioning mechanism and a measuring component 5.

[0029] The core shaft 2 is rotatably arranged in the core sleeve 1, and the core shaft 2 can slide along the core sleeve 1. In this embodiment, the core sleeve 1 and the core shaft 2 are coaxially distributed. An axial hole is provided in the core shaft 2. The axial hole extends along the axial direction of the core shaft 2 and passes through both ends of the core shaft 2. A limit sleeve 6 is provided on the upper sleeve of the core shaft 2. A set screw 8 is provided on the limit sleeve 6. The set screw 8 locks the limit sleeve 6 on the core shaft 2, and the limit sleeve 6 is located above the core sleeve 1.

[0030] like Figure 3 As shown, the tensioning mechanism is arranged on the core sleeve 1, and is used to tension and fix the core sleeve 1 in the inner hole of the drain cover seat 12. When the tensioning mechanism tensions and fixes the core sleeve 1 in the inner hole of the drain cover seat 12, the core shaft 2 is coaxial with the inner hole of the drain cover seat 12. The inner hole of the drain cover seat 12 is a circular hole, and the axis of the inner hole of the drain cover seat 12 is vertically distributed. In this embodiment, the tensioning mechanism includes a tensioning sleeve 4.1, a tensioning nut 4.2 and a tensioning assembly 4.3. The tensioning sleeve 4.1 is sleeved on the outside of the core sleeve 1. A conical surface 1.1 is provided on the outer surface of the core sleeve 1. Specifically, an annular cone is provided on the outer surface of the core sleeve 1, and the outer diameter of the annular cone gradually decreases from bottom to top, and the outer side surface of the annular cone constitutes the conical surface 1.1.

[0031] The tensioning nut 4.2 is connected to the core sleeve 1 by threads, and the tensioning nut 4.2 is located above the tensioning sleeve 4.1. The tensioning assembly 4.3 includes a number of guide holes evenly distributed on the tensioning sleeve 4.1 in the circumferential direction, a tensioning block 4.31 slidably arranged in each guide hole, and an elastic ring 4.32 surrounding the outside of each tensioning block 4.31. The guide holes extend along the radial direction of the tensioning sleeve 4.1 and penetrate the inner and outer side walls of the tensioning sleeve 4.1. The tensioning blocks 4.31 correspond to the guide holes one by one. The tensioning block 4.31 is provided with an inclined surface that matches the conical surface 1.1. The elastic ring 4.32 provides elastic force so that the inclined surface of the tensioning block 4.31 is tightly attached to the conical surface 1.1. In this way, the tensioning sleeve 4.1 can be pushed downward by tightening the tensioning nut 4.2, and the tensioning sleeve 4.1 drives the tensioning block 4.31 to move downward together. In this process, the inclined surface of the tensioning block 4.31 cooperates with the conical surface 1.1 to push out each tensioning block 4.31, thereby realizing the tensioning and fixing of the core sleeve 1 in the inner hole of the drain cover seat 12 through the tensioning mechanism.

[0032] The dial indicator 3 is arranged at the upper end of the mandrel 2. The probe 3.1 of the dial indicator 3 is arranged downward. The probe of the dial indicator 3 faces the axial hole. In this embodiment, the measuring rod of the dial indicator 3 is inserted into the upper end of the axial hole, and a locking bolt 9 is provided on the top of the mandrel 2. The end of the locking bolt 9 is against the measuring rod of the dial indicator 3, so that the dial indicator 3 is locked and fixed to the upper end of the mandrel 2. Of course, it should be noted that this is only one installation method of the dial indicator 3 being arranged at the upper end of the mandrel 2, and the dial indicator 3 can also be installed at the upper end of the mandrel 2 in other ways.

[0033] The measuring assembly 5 comprises a floating rod 5.1 slidably arranged in the axial hole, a measuring slider 5.2 slidably arranged at the lower end of the mandrel 2, a driving member 5.4 driving the measuring slider 5.2 to move, and a measuring head 5.3 arranged on the measuring head slider through a rotating shaft. The measuring slider 5.2 slides radially along the mandrel 2. The measuring head 5.3 is linked with the side head of the dial gauge 3 through the floating rod 5.1. When the measuring head 5.3 rotates around the rotating shaft, the floating rod 5.1 triggers the measuring head of the dial gauge 3.

[0034] In this embodiment, the measuring head 5.3 includes a measuring rod 5.31 and a push rod 5.32, wherein the measuring rod 5.31 extends radially along the rotating shaft of the measuring head 5.3, and the end of the measuring rod 5.31 is inclined downward; the push rod 5.32 extends radially along the rotating shaft of the measuring head 5.3. When the measuring rod 5.31 rotates downward around the rotating shaft of the measuring head 5.3, the push rod 5.32 rotates upward around the rotating shaft of the measuring head 5.3. A top plate 5.5 is provided at the lower end of the floating rod 5.1. The push rod 5.32 is located below the top plate 5.5. When the push rod 5.32 rotates upward around the rotating shaft of the measuring head 5.3, it can abut against the top plate 5.5 and lift up the top plate 5.5.

[0035] A circular cover coaxiality detection device also includes an orifice measuring snare. The inner hole of the orifice measuring snare is coaxial with the outer circle (the outer circle is the outer side of the orifice measuring snare). An annular boss is provided on the upper part of the outer side surface of the orifice measuring snare. When the coaxiality is detected, the orifice measuring snare is placed in the positioning hole on the conveyor belt, and the outer circle diameter of the orifice measuring snare is matched with the positioning hole without clearance, and the annular boss is supported on the conveyor belt, so that the rigid inner hole of the orifice measuring snare replaces the unmeasurable flexible positioning hole of the conveyor belt, and the unmeasurable becomes measurable.

[0036] The specific method of using the circular cover coaxiality detection device of this embodiment is as follows: First, as Figure 3 As shown, an aperture measuring snare 11 is placed in the positioning hole on the conveyor belt 10 for separating the caps. The outer diameter of the aperture measuring snare 11 is matched with the positioning hole without clearance (the outer diameter of the aperture measuring snare 11 is consistent with the inner diameter of the positioning hole), and the inner hole of the aperture measuring snare 11 is coaxial with the outer diameter, so that the flexible positioning hole with a rough surface is transformed into a rigid measurable hole with a smooth surface.

[0037] like Figure 1 , Figure 3 As shown, the circular cover sub-cover coaxiality detection device is installed, the core sleeve 1 is placed in the drain cover seat 12, and the core sleeve 1 is tensioned and fixed in the inner hole of the drain cover seat 12 by the tensioning mechanism, and the core shaft 2 is coaxial with the inner hole of the drain cover seat 12. Specifically, the tensioning sleeve 4.1 is pushed down by tightening the tensioning nut 4.2, and the tensioning sleeve 4.1 drives the tensioning block 4.31 to move down together. In this process, the inclined surface of the tensioning block 4.31 cooperates with the conical surface 1.1 to push out each tensioning block 4.31, so that the core sleeve 1 is tensioned and fixed in the inner hole of the drain cover seat 12 by the tensioning mechanism, and then the circular cover sub-cover coaxiality detection device is installed in the drain cover seat 12.

[0038] Second, adjust the position of the measuring head 5.3. Loosen the set screw 8 and move the mandrel 2 downward along the core sleeve 1 so that the measuring head 5.3 is located in the inner hole of the orifice measuring snare 11. Then tighten the set screw 8 to lock and fix the limit sleeve 6 on the mandrel 2. The mandrel 2 and the measuring assembly 5 are supported on the top of the core sleeve 1 through the limit sleeve 6. After tightening the set screw 8, the rotation of the mandrel 2 is not affected. Next, the driving member 5.4 moves with the probe slider, so that one end of the measuring head 5.3 is against the inner wall of the orifice measuring snare 11, and drives the measuring head 5.3 to rotate so that the floating rod 5.1 triggers the probe of the dial indicator 3.

[0039] Third, to measure the coaxiality, the core shaft 2 is rotated at least 360 degrees (generally, the core shaft 2 can be rotated 360 degrees, but in actual measurement, in order to ensure that the core shaft 2 rotates 360 degrees, it can be rotated a certain angle more). During this process, if the core shaft 2 is not coaxial with the orifice measuring snare 11, the measuring head 5.3 will rotate (the measuring head 5.3 will rotate around its rotation axis), thereby triggering the probe of the dial indicator 3 through the floating rod 5.1. Specifically, since the end of the measuring rod 5.31 is against the inner wall of the orifice measuring snare 11, and the end of the measuring rod 5.31 is tilted downward; in the process of the core shaft 2 rotating 360 degrees, if the core shaft 2 is not coaxial with the orifice measuring snare 11, the measuring rod 5.31 will rotate downward around the rotation axis of the measuring head 5.3, and the push rod 5.32 will rotate upward around the rotation axis of the measuring head 5.3, thereby lifting the floating rod 5.1 through the top plate 5.5, and the floating rod 5.1 triggers the probe of the dial indicator 3. In this way, the coaxiality between the drain cover seat 12 and the orifice measuring snare 11 can be measured by the maximum reading of the dial gauge 3, thereby realizing the quantitative detection of the coaxiality between the inner hole of the drain cover seat 12 and the positioning hole of the conveyor belt 10. If the maximum reading of the dial gauge 3 falls within the set range, it means that the coaxiality is qualified, and at this time, the position of the drain cover seat 12 can be fixed. If the maximum reading of the dial gauge 3 exceeds the set range, it means that the coaxiality is unqualified. If the coaxiality is unqualified, the position of the drain cover seat 12 is moved according to the data and direction during the measurement, and then the coaxiality is measured again until the maximum reading of the dial gauge falls within the set range. At this time, the position of the drain cover seat 12 can be fixed; thereby accurately adjusting the coaxiality between the inner hole of the drain cover seat 12 and the positioning hole of the conveyor belt 10, and effectively improving the stability and reliability of the lower cover.

[0040] Compared with the prior art which uses a centering core rod to align the coaxiality of the leak cover seat 12 and the positioning hole of the conveyor belt 10, there is a problem that the coaxiality alignment accuracy between the inner hole of the leak cover seat 12 and the positioning hole of the conveyor belt 10 is poor, and repeated adjustment and verification are required, which is labor-intensive and time-consuming, and the alignment operation is difficult; in this embodiment, a circular cover coaxiality detection device is used to measure and align the positioning holes of the leak cover seat 12 and the conveyor belt 10, which can realize quantitative detection of the coaxiality of the inner hole of the leak cover seat 12 and the positioning hole of the conveyor belt 10, thereby accurately adjusting the coaxiality of the inner hole of the leak cover seat 12 and the positioning hole of the conveyor belt 10, and improving the stability and reliability of the lower cover; it can effectively solve the current problem of poor coaxiality between the inner hole of the leak cover seat 12 and the positioning hole of the conveyor belt 10, and the inefficient trial and error method of repeated adjustment and startup verification, thereby improving startup reliability and reducing defective rate.

[0041] Specifically, Figure 1 , Figure 2 As shown, a mounting seat is provided at the lower end of the mandrel 2. The mounting seat and the mandrel 2 can be integrally formed, or the mounting seat and the mandrel 2 can be separately manufactured and connected as a whole by bolts or welding. A slide groove is provided on the mounting seat extending radially along the mandrel 2. The measuring slide block 5.2 is slidably arranged in the slide groove.

[0042] The driving member 5.4 comprises a driving bolt 5.41, which is arranged on the mounting seat and parallel to the sliding direction of the measuring slide block 5.2. The driving bolt 5.41 drives the measuring slide block 5.2 to slide.

[0043] In one embodiment, the driving bolt 5.41 is rotatably arranged on the mounting seat, and the driving bolt 5.41 is connected to the measuring slide block 5.2 through threads. Thus, by rotating the driving bolt 5.41, the measuring slide block 5.2 is driven to slide along the slide groove.

[0044] In another embodiment, if Figure 2 As shown, the driving bolt 5.41 is connected to the mounting seat by threads, and the driving bolt 5.41 is provided with a coaxially distributed annular sleeve 5.42, which is fixed on the driving bolt 5.41, and the measuring slide block 5.2 is provided with a groove, and a part of the annular sleeve 5.42 extends into the groove. In this way, by rotating the driving bolt 5.41, the annular sleeve 5.42 is driven to move axially along the driving bolt 5.41, so that the annular sleeve 5.42 cooperates with the groove to drive the measuring slide block 5.2 to slide along the slide groove.

[0045] In this embodiment, Figure 1 As shown, the measuring slider 5.2 is provided with a limit portion. In this embodiment, the measuring slider 5.2 is provided with an upwardly distributed step surface 5.8, which constitutes the limit portion. The top plate 5.5 moves downward along the axial hole under the gravity of the floating rod 5.1 and the top plate 5.5 and abuts against the limit portion.

[0046] like Figure 1 As shown, the measuring slide block 5.2 is also provided with a travel limiter 5.7, which is located below the push rod 5.32 and limits the downward rotation angle of the push rod 5.32.

[0047] Further, such as Figure 1 As shown, the measuring assembly 5 also includes a spring 5.6. The spring 5.6 is sleeved on the floating rod 5.1, the upper end of the spring abuts on the step of the inner wall of the axial hole, and the lower end of the spring abuts on the top plate 5.5. The top plate 5.5 moves downward under the action of the spring 5.6 and abuts on the limiter. In this way, the top plate 5.5 will move downward along the axial hole and abut on the limiter under the combined action of the gravity of the floating rod 5.1 and the top plate 5.5 and the spring 5.6.

[0048] Further, such as Figure 1 As shown, a bearing 7 is sleeved on the core shaft 2. The bearing 7 is located between the limiting sleeve 6 and the core sleeve 1. The bearing 7 is supported on the top of the core sleeve 1, and the limiting sleeve 6 is supported on the bearing 7. In this way, after tightening the set screw 8, the rotation of the core shaft 2 will not be affected, and the core shaft 2 can be rotated easily.

[0049] Further, such as Figure 1 As shown, the end of the measuring rod 5.31 is provided with a spherical surface. In the process of measuring coaxiality, the end of the measuring rod 5.31 is pressed against the inner wall of the orifice measuring snare 11 through the spherical surface, so that the friction between the end of the measuring rod 5.31 and the inner wall of the orifice measuring snare 11 can be reduced during the rotation of the core shaft 2.

[0050] The end of the push rod 5.32 is provided with a spherical surface. In the process of measuring the coaxiality, the end of the push rod 5.32 is pressed against the lower surface of the top plate 5.5 through the spherical surface.

[0051] Further, such as Figure 1 As shown, the outer side of the tension block 4.31 is provided with a slot. The elastic ring 4.32 is limited in the slot. In this way, the elastic ring 4.32 can be limited by the slot to ensure that the elastic ring 4.32 makes the inclined surface of the tension block 4.31 close to the conical surface 1.1.

[0052] The elastic ring 4.32 is an elastic rubber ring, such as a rubber band; or the elastic ring 4.32 is an elastic metal clamp ring, which has a fracture and is not a complete circular ring.

[0053] In this embodiment, there are one or more tensioning components 4.3, the conical surface 1.1 on the outer side surface of the core sleeve 1 corresponds to the tensioning components 4.3 one by one, and the inclined surface of the tensioning block 4.31 is tightly attached to the corresponding conical surface 1.1.

[0054] In one embodiment, there are two tensioning assemblies 4.3, one above the other. Each tensioning assembly 4.3 includes 3-6 guide holes. Each tensioning assembly 4.3 has 1-3 elastic rings 4.32. In the figure, each tensioning assembly 4.3 has 2 elastic rings 4.32, one above the other.

[0055] In another embodiment, there is one tensioning assembly 4.3. Each tensioning assembly 4.3 includes 3-6 guide holes. Each tensioning assembly 4.3 has 1-3 elastic rings 4.32. In the figure, each tensioning assembly 4.3 has 2 elastic rings 4.32, one above the other.

[0056] Specific embodiment three, a circular cover sub-cover coaxiality detection method using a circular cover sub-cover coaxiality detection device, the specific structure of the circular cover sub-cover coaxiality detection device in this method refers to specific embodiment one or specific embodiment two.

[0057] The method for detecting the coaxiality of a circular cover comprises the following steps: First, as Figure 3As shown, an aperture measuring snare 11 is placed in the positioning hole on the conveyor belt 10 for separating the covers. The outer diameter of the aperture measuring snare 11 is matched with the positioning hole without clearance (the outer diameter of the aperture measuring snare 11 is consistent with the inner diameter of the positioning hole), and the inner hole of the aperture measuring snare 11 is coaxial with the outer circle, so that the flexible positioning hole with a rough surface is transformed into a rigid measurable hole with a smooth surface.

[0058] like Figure 1 , Figure 3 As shown, the circular cover sub-cover coaxiality detection device is installed, the core sleeve 1 is placed in the drain cover seat 12, and the core sleeve 1 is tensioned and fixed in the inner hole of the drain cover seat 12 by the tensioning mechanism, and the core shaft 2 is coaxial with the inner hole of the drain cover seat 12. Specifically, the tensioning sleeve 4.1 is pushed down by tightening the tensioning nut 4.2, and the tensioning sleeve 4.1 drives the tensioning block 4.31 to move down together. In this process, the inclined surface of the tensioning block 4.31 cooperates with the conical surface 1.1 to push out each tensioning block 4.31, so that the core sleeve 1 is tensioned and fixed in the inner hole of the drain cover seat 12 by the tensioning mechanism, and then the circular cover sub-cover coaxiality detection device is installed in the drain cover seat 12.

[0059] Second, adjust the position of the measuring head 5.3, move the mandrel 2 downward along the core sleeve 1, so that the measuring head 5.3 is located in the inner hole of the orifice measuring snare 11; specifically, loosen the set screw 8, move the mandrel 2 downward along the core sleeve 1, so that the measuring head 5.3 is located in the inner hole of the orifice measuring snare 11; then tighten the set screw 8, lock and fix the limit sleeve 6 on the mandrel 2, and support the mandrel 2 and the measuring assembly 5 on the top of the core sleeve 1 through the limit sleeve 6; Next, the driving member 5.4 moves the probe slider, so that one end of the measuring head 5.3 abuts against the inner wall of the orifice measuring snare 11, and drives the measuring head 5.3 to rotate so that the floating rod 5.1 triggers the probe of the dial indicator 3; specifically, the driving member 5.4 moves the probe slider, so that the end of the measuring rod 5.31 of the measuring head 5.3 abuts against the inner wall of the orifice measuring snare 11, and drives the measuring head 5.3 to rotate through the measuring rod 5.31, so that the push rod 5.32 rotates upward around the rotating shaft of the measuring head 5.3, and the top plate 5.5 and the floating rod 5.1 are lifted up by a set distance (for example, the top plate 5.5 and the floating rod 5.1 are lifted up by 1-2 mm), so that the floating rod 5.1 triggers the probe of the dial indicator 3.

[0060] Third, to measure the coaxiality, rotate the mandrel 2 at least 360 degrees (generally, the mandrel 2 can be rotated 360 degrees, but in actual measurement, in order to ensure that the mandrel 2 rotates 360 degrees, it can be rotated a certain angle more), and measure the coaxiality of the drain cover seat 12 and the orifice measuring snare 11 through the maximum reading of the dial indicator 3; specifically, since the end of the measuring rod 5.31 is against the inner wall of the orifice measuring snare 11, and the end of the measuring rod 5.31 is tilted downward; in the process of the mandrel 2 rotating 360 degrees, if the mandrel 2 and the orifice measuring snare 11 are not coaxial, the measuring rod 5.31 will rotate downward around the rotating axis of the measuring head 5.3, and at the same time, the push rod 5.32 will rotate upward around the rotating axis of the measuring head 5.3, thereby lifting the floating rod 5.1 through the top plate 5.5, and the floating rod 5.1 triggers the measuring head of the dial indicator 3; therefore, the coaxiality of the drain cover seat 12 and the orifice measuring snare 11 can be measured through the maximum reading of the dial indicator 3.

[0061] If the maximum reading of the dial indicator 3 falls within the set range, it means that the coaxiality is qualified. At this time, the position of the drain cover seat 12 can be fixed.

[0062] If the maximum reading of the dial gauge 3 exceeds the set range, it means that the coaxiality is unqualified. If the coaxiality is unqualified, move the position of the drain cover seat 12 according to the data and direction during measurement, and then return to the third step to measure the coaxiality again until the maximum reading of the dial gauge falls within the set range. In this way, the coaxiality of the drain cover seat 12 and the orifice measuring snare 11 can be measured by the maximum reading of the dial gauge 3, thereby realizing the quantitative detection of the coaxiality of the inner hole of the drain cover seat 12 and the positioning hole of the conveyor belt 10; at the same time, the coaxiality of the inner hole of the drain cover seat 12 and the positioning hole of the conveyor belt 10 can be accurately adjusted to effectively improve the stability and reliability of the lower cover.

[0063] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent transformation made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A circular cover coaxiality detection device, characterized in that: include: Core sleeve; A core shaft is rotatably arranged in the core sleeve and can slide along the core sleeve, and an axial hole is arranged in the core shaft; A tensioning mechanism, which tensions and fixes the core sleeve in the inner hole of the drain cover seat, and the core shaft is coaxial with the inner hole of the drain cover seat; A dial indicator is arranged at the upper end of the mandrel, with the probe of the dial indicator facing the axial hole; The measuring assembly includes a floating rod slidably set in the axial hole, a measuring slider slidably set at the lower end of the core shaft along the radial direction of the core shaft, a driving member for driving the measuring slider to move, and a measuring head rotatably set on the probe slider. The measuring head is linked to the side head of the dial indicator through the floating rod. During the rotation of the measuring head, the floating rod triggers the probe of the dial indicator.

2. The circular cover coaxiality detection device according to claim 1 is characterized in that: The measuring head comprises a measuring rod and a push rod. A push plate is arranged at the lower end of the floating rod. The push rod is located below the push plate. The push rod can abut against and lift up the push plate during rotation.

3. The circular cover coaxiality detection device according to claim 2 is characterized in that: The measuring assembly also includes a spring, and a limiting portion is provided on the measuring slide block. The top plate moves downward under the action of the spring and abuts against the limiting portion.

4. The circular cover coaxiality detection device according to claim 1, 2 or 3, characterized in that: The tensioning mechanism comprises: A tensioning sleeve is sleeved outside the core sleeve, and a conical surface is provided on the outer side of the core sleeve; A tensioning nut threadably connected to the core sleeve and located above the tensioning sleeve; The tensioning assembly includes a plurality of guide holes circumferentially distributed on the tensioning sleeve, a tensioning block slidably arranged in each guide hole, and an elastic ring surrounding the outside of each tensioning block. The tensioning block is provided with an inclined surface matching the conical surface, and the elastic ring provides elastic force to make the inclined surface of the tensioning block close to the conical surface.

5. The circular cover coaxiality detection device according to claim 4 is characterized in that: A clamping groove is arranged on the outer side surface of the tensioning block, and the elastic ring is limited in the clamping groove.

6. The circular cover coaxiality detection device according to claim 4 is characterized in that: The elastic ring is an elastic rubber ring or an elastic metal clamping ring.

7. The circular cover coaxiality detection device according to claim 1, 2 or 3, characterized in that: The upper part of the core shaft is provided with a limit sleeve, and the limit sleeve is provided with a set screw, which locks and fixes the limit sleeve on the core shaft, and the limit sleeve is located above the core sleeve; the upper part of the core shaft is provided with a bearing, and the bearing is located between the limit sleeve and the core sleeve.

8. The circular cover coaxiality detection device according to claim 1, 2 or 3, characterized in that: The lower end of the core shaft is provided with a mounting seat, a slide groove extending radially along the core shaft is provided on the mounting seat, and the measuring slider is slidably arranged in the slide groove. The driving member includes a driving bolt, which is arranged on the mounting seat and drives the measuring slider to slide.

9. The circular cover coaxiality detection device according to claim 1, 2 or 3, characterized in that: It also includes an orifice measuring snare, whose inner hole is coaxial with the outer circle.

10. A detection method using the circular cover coaxiality detection device according to any one of claims 1 to 9, characterized in that: The following steps are included: First, place an orifice measurement snare into the positioning hole on the conveyor belt; Put the core sleeve into the drain cover seat, and tighten and fix the core sleeve in the inner hole of the drain cover seat through the tensioning mechanism. At this time, the core shaft is coaxial with the inner hole of the drain cover seat; Second, the position of the measuring head is adjusted. The core shaft is moved downward along the core sleeve so that the measuring head is located in the inner hole of the orifice measuring ring. Then, the driving member drives the measuring head slider to move so that one end of the measuring head is against the inner wall of the orifice measuring ring, and drives the measuring head to rotate so that the floating rod triggers the measuring head of the dial indicator. Third, rotate the core shaft 360 degrees and measure the coaxiality of the drain cover seat and the orifice measuring ring through the dial indicator reading.

Images