CN107246856B - Positioning device and positioning method for expandable support inner cavity type cylindrical part - Google Patents
Positioning device and positioning method for expandable support inner cavity type cylindrical part Download PDFInfo
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- CN107246856B CN107246856B CN201710642592.0A CN201710642592A CN107246856B CN 107246856 B CN107246856 B CN 107246856B CN 201710642592 A CN201710642592 A CN 201710642592A CN 107246856 B CN107246856 B CN 107246856B
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- mandrel
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- side wall
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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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
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Abstract
The invention discloses a positioning device and a positioning method for an expandable support inner cavity type cylindrical part, wherein the positioning device comprises: the mandrel is symmetrically arranged on the expansion positioning mechanisms at the left end and the right end of the mandrel; the expansion positioning mechanism comprises an expansion limiting sleeve which is fixedly arranged on the mandrel, the middle part of the mandrel is taken as the inner part, the two ends of the mandrel are taken as the outer parts, the expansion limiting sleeve comprises a circumferential side wall with an outward opening, and the circumferential side wall is annular and is coaxial with the mandrel; the movable limiting sleeve is positioned outside the expansion limiting sleeve and driven to move forward and backward along the axial direction of the mandrel, and the expansion limiting sleeve is provided with a circumferential side wall with an inward opening; the circumferential side wall can be inserted into the circumferential side wall in a matching way; the expansion part comprises an arc surface protrusion formed on the outer edge of the circumferential side wall and a notch formed on the circumferential side wall, wherein when the circumferential side wall is inserted into the circumferential side wall, the circumferential side wall expands, the arc surface protrusion is supported with the inner cavity of the cylindrical part in a propping manner, and a plurality of supporting points are formed to realize positioning. The invention has the advantage of simple positioning.
Description
Technical Field
The invention relates to the technical field of mechanical design, in particular to a positioning device and a positioning method for an expandable support inner cavity type cylindrical part.
Background
The tube-shape spare is common mechanical design product, to its diameter, circularity, straightness's geometric dimensions such as straightness that hangs down and form and position tolerance's measurement, generally need measure the location to it with the help of some positioner, the locate mode commonly used can roughly divide into excircle location and inner chamber location two kinds, especially when needs use the inner chamber as the benchmark, when appraising excircle parameter, just need to stabilize the support to the inner chamber, thereby can establish the axis and measure the benchmark, and, when required detection work piece length is great, more need one kind can realize that the positioner of inner chamber fixed measures the location to the tube-shape spare. Therefore, a detection positioning tool is needed to be designed to perform measurement auxiliary positioning on the cylindrical member, so that accurate measurement of each geometric quantity is completed.
Disclosure of Invention
The invention aims to provide a positioning device and a positioning method for an expandable support inner cavity type cylindrical part, aiming at the technical defects in the prior art, and the positioning device and the positioning method can realize auxiliary positioning for detecting the geometric quantity of the cylindrical part.
The technical scheme adopted for realizing the purpose of the invention is as follows:
an inflatable supported internal cavity barrel positioning device comprising:
the mandrel is symmetrically arranged on the expansion positioning mechanisms at the left end and the right end of the mandrel;
the expansion positioning mechanism comprises a positioning device and a positioning device,
the expansion limiting sleeve is fixedly arranged on the mandrel, the middle part of the mandrel is taken as the inner part, the two ends of the mandrel are taken as the outer parts, the expansion limiting sleeve comprises a circumferential side wall with an outward opening, and the circumferential side wall is annular and is coaxially arranged with the mandrel;
the movable limiting sleeve is positioned outside the expansion limiting sleeve and driven to move forward and backward along the axial direction of the mandrel, and a circumferential side wall with an inward opening is arranged on the movable limiting sleeve; the circumferential side wall can be inserted into the circumferential side wall in a matching way;
the expansion part comprises an arc surface protrusion formed on the outer edge of the circumferential side wall and a notch formed on the circumferential side wall, wherein when the circumferential side wall is inserted into the circumferential side wall, the circumferential side wall expands, the arc surface protrusion is supported with the inner cavity of the cylindrical part in a propping manner, and a plurality of supporting points are formed to realize positioning.
Preferably, the notch comprises an inner circular notch and an outer strip-shaped notch which are of an integral structure.
Preferably, a pressure spring is arranged between the movable limiting sleeve and the expansion limiting sleeve and used for pushing the movable limiting sleeve to separate from the expansion limiting sleeve.
Preferably, the movable limiting sleeve is pushed by a locking nut, and the locking nut is in threaded connection with the mandrel.
Preferably, the notches are uniformly distributed on the circumferential side wall in an annular manner, so that the circumferential side wall forms an equidistant petal-shaped structure.
Preferably, two ends of the mandrel are provided with positioning tip holes for positioning and clamping the mandrel on the deflection instrument.
Preferably, the dabber is the step shaft, including setting up the interlude in central point, the both ends of interlude are equipped with function section and the working section that the diameter reduces in proper order, the working section is the location utensil, supports on V type supporting rack.
Preferably, the interference setting is put at the functional section in the central point of bloated tight stop collar, and its axial position is restricted by interlude terminal surface, activity stop collar clearance sets up at the functional section.
Preferably, the movable limiting sleeve and the expansion limiting sleeve are both made of bearing steel materials and are subjected to quenching treatment.
Preferably, the outer side of the outer edge of the movable limiting sleeve is provided with a conical surface, the conical surface comprises two sections of conical surfaces, a first conical surface positioned at the lower part is an assembly guide cone for guiding, and a second conical surface positioned at the upper part is a matching conical degree for controlling the axial assembly position.
In another aspect, the method for positioning the positioning device for the expandable support internal cavity type barrel comprises the following steps:
(1) the expansion limiting sleeve is fixedly arranged on the mandrel, the movable limiting sleeve is sleeved on the mandrel,
(2) and sleeving the cylindrical part, after the positioning expansion position is determined, pushing the movable limiting sleeve into the expansion limiting sleeve, expanding the circumferential side wall outwards, pushing the cambered surface bulge to abut against the inner cavity of the cylindrical part, and pushing until the cylindrical part cannot move axially under the action of external force, so that positioning is realized.
Preferably, in the step (1), a locking nut is screwed in the outer side of the movable limiting sleeve, and in the step (2), the movable limiting sleeve is pushed by the locking nut.
Compared with the prior art, the invention has the beneficial effects that:
the expansion limiting sleeve with the arc-surface petal-shaped bulges can realize simultaneous contact positioning of multiple points of the tubular part, so that the tubular part is uniformly stressed, the expansion force can be adjusted by the screwing-in length of the locking nut, the movable limiting sleeve can be quickly rebounded by the pressure spring, the arc-surface bulges are retracted, the tubular part is quickly installed and clamped, and the detection and clamping efficiency is improved.
Drawings
FIG. 1 is a block diagram of an expandable support lumen cartridge positioning device;
fig. 2 is a schematic structural view of the mandrel.
FIG. 3 is an external view of the expansion stop collar;
fig. 4 is a side view of the expansion stop collar.
FIG. 5 is an enlarged view of the conical surface of the outer edge of the movable stop collar.
Wherein: 1-mandrel, 2-expansion limiting sleeve, 3-movable limiting sleeve, 4-locking nut, 5-pressure spring, 6-working section, 7-functional section, 8-middle section, 9-cambered surface bulge and 10-notch.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1-5, the present invention discloses an expandable support lumen type cylinder positioning device, comprising:
the mandrel comprises a mandrel 1 and expansion positioning mechanisms symmetrically arranged at the left end and the right end of the mandrel 1;
the expansion positioning mechanism comprises a positioning device and a positioning device,
the expansion limiting sleeve 2 is fixedly arranged on the mandrel 1, the middle of the mandrel 1 is taken as the inside, the two ends of the mandrel are taken as the outside, the expansion limiting sleeve 2 comprises a circumferential side wall which is opened outwards, and the circumferential side wall is annular and is coaxial with the mandrel 1;
the movable limiting sleeve 3 is positioned on the outer side of the expansion limiting sleeve 2 and driven to move back and forth along the axial direction of the mandrel 1, and the movable limiting sleeve 3 is provided with a circumferential side wall which is opened inwards; the circumferential side wall can be inserted into the circumferential side wall in a matching way;
and the expansion part comprises an arc-shaped bulge 9 formed on the outer edge of the circumferential side wall and a notch 10 formed on the circumferential side wall.
The movable limiting sleeve 3 and the expansion limiting sleeve 2 are both made of bearing steel materials and are subjected to quenching treatment. Improving the hardness and increasing the wear resistance.
Most preferably, the notch 10 comprises an inner circular notch and an outer strip-shaped notch which are integrally formed, and the arrangement of the notches facilitates quick expansion and retraction of the circumferential side wall.
Most preferably, a pressure spring 5 is arranged between the movable limiting sleeve 3 and the expansion limiting sleeve 2, and the pressure spring 5 is used for pushing the movable limiting sleeve 3 to be separated from the expansion limiting sleeve 2. Due to the arrangement of the pressure spring 5, the movable limiting sleeve 3 rebounds quickly, the cambered surface protrusion 9 is retracted quickly, and the cylindrical part can be detached conveniently.
Most preferably, the movable limiting sleeve 3 is pushed by a locking nut 4, and the locking nut 4 is in threaded connection with the mandrel 1. When the locking nut 4 is screwed inwards, the movable limiting sleeve 3 can be stably pushed, and after the locking nut 4 is screwed with the external thread of the mandrel 1, the movable limiting sleeve 3 is pushed to feed along the axial direction along with the continuous screwing of the locking nut 4 and the external thread of the mandrel 1, so that the petal-shaped cambered surface bulges 9 of the expansion limiting sleeve 2 are outwards expanded, the cylindrical part is expanded, and meanwhile, the movable limiting sleeve 3 enables the pressure spring 5 to be compressed; when the locking nut 4 returns, the pressure spring 5 rebounds, the movable limiting sleeve 3 returns, the expanding limiting sleeve 2 is retracted through the petal-shaped cambered surface protrusions 9, and the cylindrical part can be taken down.
Most preferably, the outer side of the outer edge of the movable limiting sleeve 3 is provided with a conical surface. So that the movable stop collar 3 can be smoothly inserted into the expansion stop collar 2. The outer edge outer side conical surface of the movable limiting sleeve comprises two sections of conical surfaces, an assembly guide cone located at the lower portion and a matching cone located at the upper portion, the assembly guide cone is used for guiding, and the matching cone is used for controlling the axial assembly position.
Most preferably, the notches are uniformly distributed on the circumferential side wall in an annular shape, so that the circumferential side wall forms an equidistant petal-shaped structure. The multi-point simultaneous contact positioning of the cylindrical part can be realized, the stress of the cylindrical part is uniform, and the expansion force can be adjusted by the screwing-in length of the locking nut.
Most preferably, the two ends of the mandrel 1 are provided with positioning center holes for positioning and clamping the mandrel 1 on a deflection instrument, the mandrel 1 is ground and processed with high precision, the positioning center holes meeting the national standard are processed on the two end surfaces, after the processing is finished, the positioning center holes at the two ends are positioned and clamped on the deflection instrument, and the radial runout of each diameter section is measured and is less than 0.01 mm.
Most preferably, the mandrel 1 is a stepped shaft and comprises a middle section 8 arranged at the center, the two ends of the middle section are provided with a functional section 7 and a working section 6, the diameters of the functional section and the working section are sequentially reduced, and the working section 6 is a positioning tool and is supported on a V-shaped supporting frame. The working section 6 is provided with a thread section for screwing the locking nut 4 to realize the positioning of the tool, the center position of the expansion limiting sleeve 2 is arranged in the functional section in an interference manner, the axial position of the expansion limiting sleeve is limited by the end surface of the middle section, and the clearance of the movable limiting sleeve 3 is arranged in the functional section.
In another aspect, the method for positioning the positioning device for the expandable support internal cavity type barrel comprises the following steps:
(1) the expansion limiting sleeve is fixedly arranged on the mandrel 1, the movable limiting sleeve 3 is sleeved on the mandrel 1,
(2) the barrel-shaped part is sleeved, after the positioning expansion position is determined, the movable limiting sleeve 3 is pushed into the expansion limiting sleeve, the circumferential side wall expands outwards, the cambered surface bulge 9 abuts against the inner cavity of the barrel-shaped part, and the barrel-shaped part is pushed until the barrel-shaped part cannot move axially under the action of external force, so that positioning is realized.
Most preferably, the two expansion limiting sleeves 2 are assembled with the mandrel 1 in an interference manner, the middle section 8 end face of the mandrel 1 is axially limited, the two compression springs 5 are respectively sleeved on the two expansion limiting sleeves 3, the two ends of each movable limiting sleeve are screwed into the locking nuts 4 after the mandrel 1 is sleeved with the two movable limiting sleeves 3, the screwing positions are based on the fact that the cambered protrusions 9 of the expansion limiting sleeves 2 do not stretch outwards, the cylindrical part is sleeved, the locking nuts 4 are screwed in respectively after the positioning expansion positions are determined, the cylindrical part cannot move axially under the action of external force until the cylindrical part cannot move axially, and finally the positioned cylindrical part is placed on the V-shaped support frame, so that the geometric quantity detection of the cylindrical part can be carried out.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. An inflatable supported internal cavity barrel positioning device, comprising:
the mandrel is symmetrically arranged on the expansion positioning mechanisms at the left end and the right end of the mandrel;
the expansion positioning mechanism comprises a positioning device and a positioning device,
the expansion limiting sleeve is fixedly arranged on the mandrel, the middle part of the mandrel is taken as the inner part, the two ends of the mandrel are taken as the outer parts, the expansion limiting sleeve comprises a circumferential side wall with an outward opening, and the circumferential side wall is annular and is coaxially arranged with the mandrel;
the movable limiting sleeve is positioned outside the expansion limiting sleeve and driven to move forward and backward along the axial direction of the mandrel, and a circumferential side wall with an inward opening is arranged on the movable limiting sleeve; a circumferential sidewall matably insertable into the circumferential sidewall;
the expansion part comprises an arc surface bulge formed on the outer edge of the circumferential side wall and a notch formed on the circumferential side wall, wherein when the circumferential side wall is inserted into the circumferential side wall, the circumferential side wall expands, and the arc surface bulge is propped against the inner cavity of the cylindrical part to form multiple supporting points to realize positioning; the outer side of the outer edge of the movable limiting sleeve is provided with a conical surface, the conical surface comprises two sections of conical surfaces, the first conical surface positioned at the lower part is an assembly guide cone and used for guiding, and the second conical surface positioned at the upper part is a matching cone and used for controlling the axial assembly position;
the mandrel is a stepped shaft and comprises a middle section arranged at the central position, the two ends of the middle section are provided with a functional section and a working section, the diameters of the functional section and the working section are sequentially reduced, the working section is a positioning tool and is supported on a V-shaped supporting frame, the central position of the expansion limiting sleeve is arranged at the functional section in an interference manner, the axial position of the expansion limiting sleeve is limited by the end surface of the middle section, and the gap of the movable limiting sleeve is arranged at the functional section;
and two ends of the mandrel are provided with positioning tip holes for positioning and clamping the mandrel on the deflection instrument.
2. The device as claimed in claim 1, wherein a compression spring is provided between the movable stop collar and the expansion stop collar for urging the movable stop collar away from the expansion stop collar.
3. The device of claim 1, wherein the movable stop collar is advanced by a lock nut, the lock nut being threadably connected to the mandrel.
4. The inflatable supported internal chamber cartridge positioning device of claim 1, wherein the notch comprises an inner circular notch and an outer strip notch of a unitary structure.
5. The device of claim 1, wherein the indentations are evenly distributed in a ring shape on the circumferential sidewall such that the circumferential sidewall forms equally spaced lobes.
6. A method of positioning an inflatable supported internal chamber barrel positioning device as recited in claim 1, comprising the steps of:
(1) the expansion limiting sleeve is fixedly arranged on the mandrel, the movable limiting sleeve is sleeved on the mandrel,
(2) and sleeving the cylindrical part, after the positioning expansion position is determined, pushing the movable limiting sleeve into the expansion limiting sleeve, expanding the circumferential side wall outwards, pushing the cambered surface bulge to abut against the inner cavity of the cylindrical part, and pushing until the cylindrical part cannot move axially under the action of external force, so that positioning is realized.
7. The positioning method according to claim 6, wherein in the step (1), a locking nut is screwed in the outer side of the movable limiting sleeve, and in the step (2), the movable limiting sleeve is pushed by the locking nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710642592.0A CN107246856B (en) | 2017-07-31 | 2017-07-31 | Positioning device and positioning method for expandable support inner cavity type cylindrical part |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710642592.0A CN107246856B (en) | 2017-07-31 | 2017-07-31 | Positioning device and positioning method for expandable support inner cavity type cylindrical part |
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| CN107246856A CN107246856A (en) | 2017-10-13 |
| CN107246856B true CN107246856B (en) | 2021-05-04 |
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| CN201710642592.0A Active CN107246856B (en) | 2017-07-31 | 2017-07-31 | Positioning device and positioning method for expandable support inner cavity type cylindrical part |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107945373B (en) * | 2017-11-27 | 2023-07-07 | 安徽智佳信息科技有限公司 | Automatic vending machine spike adjustment mechanism |
| CN108687541A (en) * | 2018-06-08 | 2018-10-23 | 浙江卓越电子有限公司 | A kind of CNC engraving machines frock clamp and application method |
| CN115265276A (en) * | 2022-07-28 | 2022-11-01 | 无锡市星迪仪器有限公司 | Multi-axis positioning device and method |
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