CN112757184B - Axial accurate positioning device and method for part test - Google Patents
Axial accurate positioning device and method for part test Download PDFInfo
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- CN112757184B CN112757184B CN202011575370.XA CN202011575370A CN112757184B CN 112757184 B CN112757184 B CN 112757184B CN 202011575370 A CN202011575370 A CN 202011575370A CN 112757184 B CN112757184 B CN 112757184B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
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Abstract
The application discloses accurate positioner of part test axial and method, the device includes: the axial positioning tool comprises a placing platform and an axial testing tool table which are integrally connected; the upper end part of the axial test tooling table is provided with a needle gauge fixing part and an axial clamping part; a first groove is formed in the middle of the needle gauge fixing part, and a first clamping sub groove and a second clamping sub groove which are used for respectively clamping two end parts of the needle gauge are respectively formed in two groove walls of the first groove; the axial clamping part is provided with a first clamping block and a second clamping block, a gap is formed between the first clamping block and the second clamping block to form a second groove, and the second groove is opposite to the first groove in position; the groove-shaped fixing tool is arranged on the placing platform, and the upper end portion of the groove-shaped fixing tool is provided with a fixing groove for placing the inner ring-shaped measured piece. According to the method, the uncertainty component introduced by the combination repeatability of auxiliary measurement elements is eliminated, and the uncertainty of the test of the parts in the same batch is reduced.
Description
Technical Field
The embodiment of the application relates to a part measurement and test technology, and relates to but is not limited to a device and a method for accurately positioning a part in a test axial direction.
Background
When the novel design is adopted in part production, a large number of bush type and mount pad type parts need to be subjected to precision test. The parts belong to inner ring parts, and the test covers the measurement of the distance between the middle ring groove and the tooth profile and the axial distance between the inner part of the inner ring and the end surface, and all belong to axial geometric parameters. Due to the design particularity, the opening aperture of the part is small, the measurement space is narrow, the design index is high, and the measurement work cannot be carried out by utilizing conventional measurement means such as a traditional three-coordinate measuring machine and a height measuring instrument.
The profile measuring instrument is a precision device for measuring the shapes of various machine part plain lines and section profiles, is provided with a small-size measuring arm and a measuring needle, and is suitable for scanning and measuring the axial inner dimension of a measured piece in a narrow and narrow space. However, the measurement of the profilometer requires the transverse placement of the inner ring-shaped part, and such parts cannot be directly and stably placed on the workbench; the important parameter, namely the axial distance between the inner part of the inner ring and the end face, can not be measured only by the V-shaped frame supporting part; the position of the measuring pin is in the measured piece, which hinders the observation and can not ensure the consistency of each positioning; if positioning is performed by a method of combining a plurality of tools, the measurement positions need to be recombined each time, a plurality of uncertainty components are introduced, and positioning repeatability is poor and efficiency is low.
From the investigation condition, because interior annular part is novel design, provides novel axial parameter's test demand, temporarily does not have in the trade and can realize the quick accurate method of location of axial.
The inner ring shape structure of part makes the measured piece can't stably place on the workstation, and special measuring condition can't only be provided by traditional V-arrangement frame, and the profile appearance can't accurate recognition axial positioning, and the axial distance that can only artifical range estimation location needs additionally to cooperate the installation with the help of other instrument synchronization. Among the current part measurement structure, the profile gauge stylus causes very easily during the scanning not hard up or even drops, not only can't guarantee the uniformity of every location, is unfavorable for reducing and measures the uncertainty, and the combined process is loaded down with trivial details moreover, the measurement success rate is on the low side, seriously influences efficiency of software testing.
Disclosure of Invention
In view of this, the embodiment of the present application provides an axial precision positioning device and method for testing a part.
According to a first aspect of the application, a device for axially and accurately positioning a part test is provided, comprising:
the axial positioning tool comprises a placing platform and an axial testing tool table which are integrally connected; the upper end part of the axial test tooling table is provided with a needle gauge fixing part and an axial clamping part; a first groove is formed in the middle of the needle gauge fixing part, and a first clamping sub groove and a second clamping sub groove which are used for respectively clamping two end parts of the needle gauge are respectively formed in two groove walls of the first groove; the axial clamping part is provided with a first clamping block and a second clamping block, a gap is formed between the first clamping block and the second clamping block to form a second groove, and the second groove is opposite to the first groove in position;
the fixed frock of cell type, set up in place on the platform, the upper end is provided with places the fixed slot that interior annular was surveyed the piece.
In some embodiments, the surface of the axial test tool table close to the groove-shaped fixing tool is a chamfer surface; the scarf is for keeping away from gradually from top to bottom the structure of the fixed frock of cell type.
In some embodiments, the uppermost ends of the surfaces of the first clamping block and the second clamping block, which are close to the groove-shaped fixing tool, are vertical surfaces which can be abutted against the inner annular measured piece; except vertical off-plane, the piece is held to first card with the piece is held to the second card is close to the remaining face of the fixed frock of cell type is regarded as the scarf of axial test frock platform.
In some embodiments, the second groove, the first groove and the securing groove have the same centerline along the axial direction of the inner ring of the inner annular measured piece; the second groove, the first groove and the fixing groove are symmetrical along the center line.
In some embodiments, the two end portions of the gauge have a shape that matches the first and second catch grooves, respectively;
after the two end parts of the needle gauge are clamped in the first clamping sub groove and the second clamping sub groove, the two end parts of the needle gauge are fixed in the first clamping sub groove and the second clamping sub groove through a fixing part, and the needle gauge is fixed on the needle gauge fixing part.
According to a second aspect of the present application, there is provided a method for axially accurately positioning a part test, comprising:
fixing the inner annular tested piece in a fixing groove of a groove type fixing tool in the part testing axial accurate positioning device;
clamping a fixture at the internal test position S of the inner annular tested piece, wherein the fixture and the inner annular tested piece are arrangedA contact surface S which is close to the end surface of the axial clamping part and is abutted 0 ，
Measuring the axial distance x from the internal test position S to the central axis of the needle gauge by using a profile measuring instrument i And measuring the contact surface S by using a three-coordinate measuring machine 0 An axial distance Δ x to the needle gauge central axis;
calculating the axial distance from the internal test position S of the internal annular tested piece to the contact surface S0 as follows: x = x i -△x。
Therefore, compared with the prior art, the embodiment of the application has the beneficial effects that:
the accurate positioner of part test axial and method that this application embodiment provided, through setting up the fixed frock of axial positioning frock and cell type, are fixed in the needle gauge fixed part with the needle gauge, utilize the method of single dress card batch test to guarantee the dress card uniformity, make the distance of interior annular measured piece's terminal surface to needle gauge axis is unchangeable at the multiple repeated measurement's of single assembly in-process, and fixed being applied to the test of batch part after three coordinate measuring machine record, eliminated by the uncertainty component of auxiliary measurement element combination repeatability introduction, reduced the uncertainty of the same kind of same batch part test.
Drawings
Fig. 1 is a schematic structural diagram illustrating a component testing axial precision positioning apparatus according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a part test item provided in an embodiment of the present application;
fig. 3 is an axial parameter schematic diagram of an inner annular measured piece provided in an embodiment of the present application.
Detailed Description
Fig. 1 is a schematic structural diagram of a component testing axial precision positioning apparatus provided in an embodiment of the present invention, and as shown in fig. 1, the component testing axial precision positioning apparatus in the embodiment of the present invention includes:
the axial positioning tool 20 comprises a placing platform 21 and an axial testing tool table 22 which are integrally connected; the upper end part of the axial test tooling table 22 is provided with a needle gauge fixing part 23 and an axial clamping part 24; a first groove 25 is formed in the middle of the needle gauge fixing part 23, and a first clamping sub groove and a second clamping sub groove for respectively clamping two end parts of the needle gauge 40 are respectively formed in two groove walls of the first groove 25; the axial holding part 24 is provided with a first holding block 26 and a second holding block 27, a gap is formed between the first holding block 26 and the second holding block 27 to form a second groove 28, and the second groove 28 is opposite to the first groove 25;
and the groove-shaped fixing tool 30 is arranged on the placing platform 21, and the upper end part of the groove-shaped fixing tool is provided with a fixing groove for placing the inner annular measured piece 10.
In the embodiment of the present application, the groove-shaped fixing tool 30 is fixedly disposed on the placing platform 21.
In some embodiments, the surface of the axial test tool table 22 close to the groove-shaped fixing tool 30 is a chamfer surface; the inclined plane is a structure gradually far away from the groove-shaped fixing tool 30 from top to bottom.
In some embodiments, the uppermost ends of the surfaces of the first clamping block 26 and the second clamping block 27 close to the groove-shaped fixing tool 30 are vertical surfaces which can be abutted against the inner annular measured part 10; except for the vertical surface, the first clamping block 26 and the second clamping block 27 are close to the groove-shaped fixing tool 30, and the rest surfaces of the groove-shaped fixing tool are used as the inclined cutting surfaces of the axial test tool table.
In some embodiments, the second groove 28, the first groove 25 and the fixing groove have the same center line along the inner ring axial direction of the inner ring-shaped measured member 10; the second groove 28, the first groove 25 and the fixing groove are symmetrical along the center line.
In some embodiments, fig. 2 is a schematic diagram of a part test item provided by an embodiment of the present invention, and as shown in fig. 2, two end portions of the needle gauge 40 have shapes respectively matching with the first and second chucking sub grooves; after the two end portions of the needle gauge 40 are clamped in the first clamping sub-groove and the second clamping sub-groove, the groove spaces of the first clamping sub-groove and the second clamping sub-groove are filled, and part of the space is exposed out of the first clamping sub-groove and the second clamping sub-groove. Thus, after the two end portions of the needle gauge 40 are engaged with the first and second engaging grooves, the two end portions of the needle gauge 40 are fixed to the first and second engaging grooves by a fixing member such as a pressing plate, so that the needle gauge is fixed to the needle gauge fixing portion 23.
In the embodiment of the application, firstly, the needle gauge 40 is fixed in a longitudinal groove of the axial positioning tool 20 and is compacted by a pressing plate; the inner ring-shaped measured piece 10 is placed in a V-shaped groove of the groove-shaped fixing tool 30.
In the embodiment of the present application, the axial retaining part 24 is configured as a groove-shaped structure to reduce the contact area with the inner annular measured piece 10, so that the contact between the axial retaining part 24 and the inner annular measured piece 10 is more stable.
In the embodiment of the application, in consideration of the uncertainty of processing and manufacturing, sporadic burrs and bulges are easily caused on the annular surface (the end surface close to the axial clamping part 24) of the shoulder end of the inner annular measured part 10, so that a phenomenon of large flatness error is formed; if a larger contact plane is used to mate with it, unstable contact is likely to result. The embodiment of the application adopts a small contact surface mode for contact, and the design of the middle groove-shaped structure of the axial clamping part 24 reduces the contact area to one tenth or even less than the area of the shoulder end ring surface of the part.
The design of the small contact surface can avoid accidental burrs or bulges, and an area with good flatness is selected for contact, so that the problem of unstable contact caused by flatness processing errors of the shoulder end ring surface of the inner ring-shaped measured part 10 is solved, and the contact stability is improved.
Measuring the axial distance from the left working face of the axial positioning tool to the center of the needle gauge by using a three-coordinate measuring machine by using a contourgraph; the measuring needle sequentially scans the inner contour of the inner ring of the measured piece and the outer contour of the needle gauge to obtain the axial distance of the inner ring and the outer contour of the needle gauge; and the two distances are differed to obtain the axial distance from the inner position of the measured piece to the shoulder end ring surface.
Fig. 2 is a schematic view of a part test item provided by the embodiment of the present application, and as shown in fig. 2, the embodiment of the present application addresses a test requirement of an axial parameter of an inner annular tested piece 10, namely, an axial distance x from an inner position S of a part of the inner annular tested piece 10 to an annular surface of a right shoulder and a right end of the tested piece, that is, a design size "1.5 ± 0.01" shown in fig. 3. Book (notebook)The embodiment of the application measures the contact surface S of the ring surface of the right shoulder and the right end of the measured piece and the special fixture through a measurement auxiliary element 0 The axial distance delta x from the center O of the needle gauge on the right V-shaped groove realizes the indirect measurement of the value of the measured parameter x. In fig. 3, the Δ x value can be measured by a coordinate measuring machine with the aid of a fixture, and the uncertainty of the measurement can reach U =0.001mm, which obviously satisfies the test accuracy shown in fig. 3. With the aid of the fixture, the axial distance x from the inner position S of the inner ring-shaped measured piece 10 to the center O of the needle gauge 40 on the V-shaped groove on the right needle gauge fixing part 23 can be measured by the profile measuring instrument i . It should be understood by those skilled in the art that the illustration in fig. 3 is merely an example, and that the embodiments of the present application may test any relevant dimension of the inner ring-shaped tested object, and may also achieve other test accuracies.
The embodiment of the application also discloses an axial accurate positioning method for part testing, which comprises the following steps:
fixing an inner annular tested piece in a fixing groove of a groove-type fixing tool in the part testing axial accurate positioning device in the embodiment;
clamping a fixture at the internal test position S of the inner annular tested piece, wherein the fixture is abutted with the contact surface S of the inner annular tested piece, which is close to the end surface of the axial clamping part 0 ，
Measuring the axial distance x from the internal test position S to the central axis of the needle gauge by using a profile measuring instrument i And measuring the contact surface S by using a three-coordinate measuring machine 0 An axial distance Δ x to the needle gauge central axis;
calculating the axial distance from the internal test position S of the internal annular tested piece to the contact surface S0 as follows: x = x i -△x。
The embodiment of the application innovatively provides an axial quick and accurate positioning idea for the full-class inner annular measured piece 10, and is used for realizing the intercommunication of inner annular part tools, realizing quick and accurate clamping, improving the measurement accuracy and repeatability, effectively reducing the repeatability error and increasing the uncertainty of the measurement result to U =0.003mm.
The embodiment of the application solves the technical problems that the inner ring-shaped part cannot be measured, cannot be measured completely and cannot be measured accurately, the measurement efficiency and accuracy are effectively improved, and the measurement feasibility of parts with special structures is improved.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in various embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention. The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one of 8230, and" comprising 8230does not exclude the presence of additional like elements in a process, method, article, or apparatus comprising the element.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described device embodiments are only illustrative, for example, the division of the unit is only one logical function division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units; can be located in one place or distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, all functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be separately used as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and shall cover the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. An axial precision positioning device for testing parts, the device comprising:
the axial positioning tool comprises a placing platform and an axial testing tool table which are integrally connected; the upper end part of the axial test tooling table is provided with a needle gauge fixing part and an axial clamping part; a first groove is formed in the middle of the needle gauge fixing part, and a first clamping sub groove and a second clamping sub groove which are used for respectively clamping two end parts of the needle gauge are respectively formed in two groove walls of the first groove; the axial clamping part is provided with a first clamping block and a second clamping block, a gap is formed between the first clamping block and the second clamping block to form a second groove, and the second groove is opposite to the first groove;
the groove-shaped fixing tool is arranged on the placing platform, and a fixing groove for placing the inner annular measured piece is formed in the upper end part of the groove-shaped fixing tool; the first clamping block and the second clamping block are close to the groove-shaped fixing tool, and the uppermost end of the surface of the groove-shaped fixing tool is a vertical surface capable of being abutted against the inner annular tested piece.
2. The positioning device according to claim 1, wherein the surface of the axial test tool table close to the groove-shaped fixing tool is a chamfered surface; the scarf is for keeping away from gradually from top to bottom the structure of the fixed frock of cell type.
3. The positioning device as set forth in claim 2, wherein the remaining surfaces of the first and second clamping blocks near the groove-shaped fixture are chamfered surfaces of the axial test fixture table, except for the vertical surface.
4. The positioning device as set forth in claim 1, wherein said second groove, said first groove and said fixing groove have the same center line in the axial direction of the inner ring of said inner annular measured member; the second groove, the first groove and the fixing groove are symmetrical along the center line.
5. The positioning device according to claim 1, wherein both end portions of the needle gauge have shapes respectively matching the first and second retainer grooves;
after the two end parts of the needle gauge are clamped in the first clamping sub groove and the second clamping sub groove, the two end parts of the needle gauge are fixed in the first clamping sub groove and the second clamping sub groove through a fixing part, and the needle gauge is fixed on the needle gauge fixing part.
6. A method for accurately positioning a part in an axial direction during testing, the method comprising:
fixing an inner annular tested piece in a fixing groove of a groove-shaped fixing tool in the part testing axial precision positioning device according to any one of claims 1 to 5;
clamping a fixture at the internal test position S of the inner annular tested piece, wherein the fixture is abutted with the contact surface S of the inner annular tested piece, which is close to the end surface of the axial clamping part 0 ，
Measuring the axial distance x from the internal test position S to the central axis of the needle gauge by using a profile measuring instrument i And measuring the contact surface S by using a three-coordinate measuring machine 0 An axial distance Δ x to the needle gauge central axis;
calculating the internal test position S to the contact surface S of the internal ring-shaped tested piece 0 The axial distance of (a) is: x = x i -△x。
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011575370.XA CN112757184B (en) | 2020-12-28 | 2020-12-28 | Axial accurate positioning device and method for part test |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011575370.XA CN112757184B (en) | 2020-12-28 | 2020-12-28 | Axial accurate positioning device and method for part test |
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| CN112757184A CN112757184A (en) | 2021-05-07 |
| CN112757184B true CN112757184B (en) | 2022-10-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201110755Y (en) * | 2007-11-20 | 2008-09-03 | 神龙汽车有限公司 | Sliding teeth sleeve anti-loose flute axial direction dimensional measurement chucking appliance |
| CN106403756B (en) * | 2016-10-20 | 2019-09-20 | 深圳市中图仪器股份有限公司 | A kind of measuring device, taper plug gauge fixture and the taper ring-ga(u)ge fixture of long tubing taper thread |
| JP6372906B1 (en) * | 2018-03-06 | 2018-08-15 | 有限会社丸之内マシーナリ | measuring device |
| CN110497316A (en) * | 2019-08-16 | 2019-11-26 | 陕西科技大学 | A kind of high-accuracy portable fixed length measuring device |
| CN211317097U (en) * | 2020-01-22 | 2020-08-21 | 浙江省方正校准有限公司 | Large-size thread micrometer calibration rod detection device |
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