A kind of superhigh precision clamping device
Technical field
The utility model belongs to technical field of mechanical processing more particularly to a kind of superhigh precision clamping device.
Background technique
When blade structure is run around its rotation axis, since structure is produced relative to the quality uneven distribution of axis
Raw centrifugal force, centrifugal force make flabellum that imbalance occur at runtime, and so that flabellum bearing is generated vibration and form noise.For routine
Flabellum product, long-term uneven rotation leads to bearing accelerated wear test, serious to reduce properties of product and service life;For precision
Spend high high-precision instrument and equipment, the precision of the serious lowering apparatus equipment of the off-center operation of flabellum.
In actual production and application, using dynamic balance measuring instrument to blade structure product carry out performance detection and
Monitoring, vibratory output is converted by mechanical structure by the amount of unbalance of acquisition, and finally convert to computer processing system into
Row analysis.The balance and structural stability of dynamic balance measuring instrument itself clamping device are the most criticals for influencing its performance and precision
Factor.Therefore how using suitable machining process be continuously improved dynamic balance measuring instrument clamping device dimensional accuracy and
The accuracy of form and position is the emphasis studied in field.
The detection superhigh precision clamping device of dynamic balancing at present, be primarily present following deficiency: 1) fixture is for components
Chucking power is inadequate, and fixture dynamic balance performance itself is poor, causes error occur when detecting to components;2) existing fixture is clamping
When nonstandard shaped piece (such as the workpiece with slot or the form of gear tooth), clip jaw can be clamped in slot or tooth gaps cause partially
The heart is unable to complete high-precision nonstandard parts machining;3) such as fan part application when each be both needed to carry out dynamic balancing
Detection, and usually require to carry out multiple groups detection to each sample, clamping device needs extremely frequently to be filled when in use
Folder flicks, and existing clamping device seriously affects the measuring accuracy of test sample when hitting, and service life is very short.Therefore, it mentions
Height detects the performance of applied frock clamp in dynamic balancing and precision is of great significance.
Utility model content
For overcome the deficiencies in the prior art, the utility model is intended to provide a kind of superhigh precision clamping device.
It is described according to the superhigh precision clamping device of the utility model embodiment, including collet, sleeve and bulb locking member
Collet is made of Gripper body and grips end;Gripper body both ends are hollow structure, Gripper body one end and collet
Clamping end connection, Gripper body other end outside have Gripper body end thread, have folder on the inside of the Gripper body other end
Head body end locking hole, Gripper body center are equipped with the second enhancing annular groove, and the second enhancing annular groove is located at folder
In the hollow structure of head ontology one end, in the outside of the second enhancing annular groove, Gripper body outer wall is equipped with Gripper body point of shoulder
Face;The grips end is hollow structure, and grips end is by grips end splay end and grips end shoulder
End composition, grips end splay end center are equipped with the first enhancing annular groove;Wherein, Gripper body one end, grips
Multiple continuous cutting grooves through outer wall are formed on end point of shoulder and grips end splay end outer wall;The sleeve is hollow
Structure, sleeve include that end and sleeve second are held in parallel in parallel for sleeve splay end, sleeve first, the parallel end both ends difference of sleeve first
It terminates sleeve splay end and sleeve second is held in parallel, end outer wall is equipped with the annulus shaft shoulder, sleeve first to the sleeve first in parallel
The internal diameter held in parallel is greater than the internal diameter that sleeve second is held in parallel, and sleeve second is equipped with bush whorl in end outside in parallel;The bulb
Locking member includes balled end and the threaded joints that connect with balled end.
Exemplary embodiment according to the present utility model, described Gripper body one end are formed with the first cutting groove, and described
One cutting groove is parallel with center of collet axis;First cutting groove one end is formed with ellipse cutting groove, first cutting
Slot prolongs the other end and extends to grips end point of shoulder, and grips end point of shoulder is formed with the second cutting groove and third cutting groove;
Third cutting groove extends to grips end splay end, and grips end splay end is formed with the 4th cutting groove and the 5th cutting
Slot;Wherein, on its normal direction perspective plane, the angle of the first cutting groove and the second cutting groove is 90 ° -125 °, the second cutting groove with
The angle of third cutting groove is 65 ° -85 °, and the angle of third cutting groove and the 4th cutting groove is 120 ° -155 °;5th cutting groove
For curve, one end is connect with the 4th cutting groove, and one end is connect with the outer end face of grips end, and (i.e. curve exists chord length
The line of two-end-point on normal direction perspective plane) it with the angle of the 4th cutting groove is 50 ° -65 °.
The both ends of exemplary embodiment according to the present utility model, grips end splay end are surrounded by inclined-plane.
Exemplary embodiment according to the present utility model, the sleeve second are equipped with blind hole in end outside in parallel.
Exemplary embodiment according to the present utility model, the annulus shaft shoulder are equipped with recessed in the side towards sleeve splay end
Slot.
Exemplary embodiment according to the present utility model is equipped with the first holding holes and the second clamping in grips end
Hole, grips end be connected on the inside of one end with Gripper body and Gripper body on the inside of be formed with the first noumenon inner hole, first
The diameter of ontology inner hole is greater than the diameter D of the first holding holes and the second holding holes.
Exemplary embodiment according to the present utility model, the first holding holes of the collet and the diameter D of the second holding holes
For Φ 2mm- Φ 8mm, the diameter of the first noumenon inner hole is D+2.0mm-2.8mm.
Exemplary embodiment according to the present utility model, the radius of the grips end inner hole rounding arc are 1/6D-
D, the lateral distance a of circular arc two-end-point are 3/100D-1/5D, and the fore-and-aft distance b of circular arc two-end-point is 6/100D-1/10D.
The groove width of exemplary embodiment according to the present utility model, the first enhancing annular groove is 1/6D-1/2D,
In, the medial launder diameter d1 of the first enhancing annular groove is D+1mm.
The groove width of exemplary embodiment according to the present utility model, the second enhancing annular groove is 1/8D-1/2D,
In, the medial launder diameter of the second enhancing annular groove is D+1mm.
Exemplary embodiment according to the present utility model, grips end outer end face to the second holding holes and first
The distance (L) of ontology inner hole junction is 3D-5D.
Exemplary embodiment according to the present utility model, locking hole include that spherical interior hole portion and internal screw thread connected to it connect
The radius r of socket part, spherical interior hole portion is 0.5D-0.55D, and the spherical interior hole portion centre of sphere and the distance lambda of Gripper body end end face are
0.05D, female threaded joint internal screw thread λ 2 is having a size of 5/6D;In the balled end of the bulb locking member and the spherical of locking member
Hole portion coincides, and the threaded joints of the bulb locking member and the female threaded joint shape of locking hole match.
Utility model compared with prior art, has according to the superhigh precision clamping device of the utility model exemplary embodiment
It has the advantage that
1) clamping device of the utility model can significantly improve the dynamic balance performance of itself;
2) clamping device of the utility model can significantly improve the chucking power for clamped part;
3) clamping device of the utility model can carry out superhigh precision clamping to the nonstandard part of abnormity;
4) clamping device of the utility model can significantly improve service life.
Detailed description of the invention
Fig. 1 is the section assembly structure diagram according to the superhigh precision clamping device of the utility model embodiment;
Fig. 2 is the schematic diagram of the section structure according to the collet of the utility model embodiment;
Fig. 3 is the schematic diagram of the section structure according to the sleeve of the utility model embodiment;
Fig. 4 is the collet partial enlargement structural representation according to the utility model embodiment;
Fig. 5 is the schematic diagram according to the grips end inner hole rounding arc angle of the utility model embodiment;
Fig. 6 is the grips end splay end the schematic diagram of the section structure according to the utility model embodiment;
Fig. 7 is the partial enlargement structural representation according to the collet locking hole of the utility model embodiment;
Fig. 8 is the structural schematic diagram according to the collet bulb locking member of the utility model embodiment.
In figure, A collet, A1- grips end, A11- clamping end splay end, A12- clamping end point of shoulder, A13- are continuous
Multistage cutting, the first holding holes of A14-, the second holding holes of A15-, A16- first enhance annular groove, the clamping end A17- outer end face,
A121- clamping end inner hole rounding arc angle, A13- cutting groove, the first cutting groove of A131-, the second cutting groove of A132-, A133-
Three cutting grooves, the 4th cutting groove of A134-, the 5th cutting groove of A135-, A136- ellipse cutting groove;A2- Gripper body, A21- folder
Head ontology shoulder end face, A22 second enhance annular groove, A23- the first noumenon inner hole, A24- Gripper body end thread, A25- collet
Body end locking hole;
B- sleeve, B11- sleeve splay end, B12- sleeve first are held in parallel, the B13- annulus shaft shoulder, and B14- sleeve second is parallel
End, B16- bush whorl, B18- blind hole, the first inner hole of B21-, the second inner hole of B22-, B23- third inner hole.
C- bulb locking member, C1- balled end, C2- threaded joints.
Specific embodiment
The utility model is described in detail in the following with reference to the drawings and specific embodiments.
As shown in Figure 1, superhigh precision clamping device according to the present utility model, including collet A, sleeve B and bulb locking
Part C, collet A are made of Gripper body A2 and grips end A1.
As shown in Fig. 2, the both ends Gripper body A2 are hollow structure, the one end Gripper body A2 and grips end A1 connect
It connects, there is Gripper body end thread A24 on the outside of the Gripper body A2 other end, there is collet sheet on the inside of the Gripper body A2 other end
Body end portion locking hole A25, the center Gripper body A2 are equipped with the second enhancing annular groove A22, and second, which enhances annular groove A22, is located at
In the hollow structure of the one end Gripper body A2, in the outside of the second enhancing annular groove A22, Gripper body outer wall is equipped with collet sheet
Body shoulder end face A21;The grips end A1 is hollow structure, and grips end A1 is by grips end splay end A11
It is formed with grips end point of shoulder A12, the grips end center splay end A11 is equipped with the first enhancing annular groove A16;Its
In, multiple pass through is formed on the one end Gripper body A2, grips end point of shoulder A12 and grips end splay end A11 outer wall
Wear the continuous cutting groove A13 of outer wall.
As shown in figure 3, sleeve B be hollow structure, sleeve B include sleeve splay end B11, sleeve first in parallel end B12 and
Sleeve second holds B14 in parallel, and the end both ends B12 terminate sleeve splay end B11 to sleeve first respectively in parallel and sleeve second is held in parallel
B12, end B12 outer wall is equipped with annulus shaft shoulder B13 to sleeve first in parallel, and the internal diameter of the end B12 in parallel of sleeve first is greater than sleeve the
The internal diameter of two parallel end B14, the outside end B14 is equipped with bush whorl B16 to sleeve second in parallel.
As shown in figure 4, the one end Gripper body A2 is formed with the first cutting groove A131, the first cutting groove A131 and center of collet
Axis is parallel;First one end cutting groove A131 is formed with ellipse cutting groove A136, and the first cutting groove A131 prolongs the other end and extends to
Grips end point of shoulder, grips end point of shoulder A12 are formed with the second cutting groove A132 and third cutting groove A133;Third
Cutting groove A133 extends to grips end splay end A11, and grips end splay end is formed with the 4th cutting groove A134 and
Five cutting groove A135;Wherein, on its normal direction perspective plane, the angle of the first cutting groove A131 and the second cutting groove A132 is 90 °-
125 °, the angle of the second cutting groove A132 and third cutting groove A133 is 65 ° -85 °, third cutting groove A133 and the 4th cutting groove
The angle of A134 is 120 ° -155 °;5th cutting groove A135 is curve, and one end is connect with the 4th cutting groove A134, the other end
It is connect with the outer end face A17 of grips end A1, chord length (line of curve two-end-point on normal direction perspective plane) and the 4th
The angle of cutting groove A134 is 50 ° -65 °.
The utility model realizes that fixture connects in comprehensive clamping of clamped part by the cutting groove of setting Spiral distribution
Touching clamps the superhigh precision of special-shaped shop parts to realize, and significantly improves the chucking power and clamping essence of clamping device
Degree, significantly improves its dynamic balance performance in working condition.
As shown in figure 4, the both ends of grips end splay end A11 are surrounded by inclined-plane.
As shown in figure 3, the outside end B14 is equipped with blind hole B18 to sleeve B second in parallel.
As shown in figure 3, annulus shaft shoulder B13 is equipped with groove in the side towards sleeve splay end.
As shown in Fig. 2, the diameter (D) of the first holding holes A14 and the second holding holes A15 of collet A are Φ 1mm- Φ 8mm,
The diameter of the first noumenon inner hole A23 is D+2.0mm-2.8mm.
As shown in figure 5, the radius of grips end A1 inner hole rounding arc is 1/6D-D, the lateral distance of circular arc two-end-point
It (a) is 3/100D-1/5D, the fore-and-aft distance (b) of circular arc two-end-point is 6/100D-1/10D.The utility model is by pressing from both sides collet
It holds end and carries out the setting of inner hole rounding arc, significantly reduce part in frequent clamping process to the abrasion of collet, improve collet
Service life.
As shown in fig. 6, the groove width (σ 1) of the first enhancing annular groove A16 is 1/6D-1/2D, the centre of the first enhancing annular groove
Slot diameter (d1) is D+1mm.
As shown in Fig. 2, the groove width of the second enhancing annular groove A22 is 1/6D-1/2D, the medial launder of the second enhancing annular groove is straight
Diameter is D+1mm.
As shown in fig. 6, grips end outer end face A17 is to the second holding holes A15 and the junction the first noumenon inner hole A23
Distance (L) be 3D-5D.
As shown in figure 3, sleeve first is held in parallel sets the second inner hole B22 in B12, sleeve second is held in B14 set third in parallel
Inner hole B23, the B12 wall thickness for holding B14 parallel with sleeve second in end is 2mm-5mm to sleeve first in parallel.
As shown in fig. 7, locking hole A25 includes spherical interior hole portion A251 and female threaded joint A252 connected to it, ball
The radius r of hole portion is 0.5D-0.55D in shape, and the distance lambda of the spherical interior hole portion centre of sphere and Gripper body end end face is 0.05D, interior
Threaded joints internal screw thread λ 2 is having a size of 5/6D.
As shown in figure 8, bulb locking member C includes the balled end C1 and threaded joints C2 connecting with end.
As shown in Figure 1, the balled end C1 of the bulb locking member C and the spherical interior hole portion A251 of locking member coincide,
The female threaded joint A252 shape of the threaded joints C2 and locking hole A25 of the bulb locking member C match and mutually
Connection.
The utility model avoids directly generating Gripper body shock, by face by setting (high rigidity) bulb locking member
Contact is changed to spherical point contact, significantly reduces frequent clamping during being on active service and flicks the influence to gripping apparatus grips performance, shows
Write the service life for improving clamping device.
Embodiment 1
Prepare superhigh precision clamping device according to the utility model embodiment, number be respectively S1, S2, S3, S4 and
S5, structural parameters are shown in Table 1.
Table 1
On the basis of collet axle center, the geometric tolerance that number is S1, S2, S3, S4, S5, S6, S7 and S8 is measured,
Its precision is shown in Table 2.
Table 2
As can be seen from Table 2, number is respectively the clamping of S1, S2, S3, S4, S5, S6, S7 and S8 in the utility model embodiment
Device, grips end and Gripper body concentricity are not more than 0.002mm, and the concentricity of collet and sleeve is not more than 0.003mm,
The concentricity of Gripper body end locking hole and collet is not more than 0.002mm, to guarantee the precision of clamping device itself and steady
It is qualitative;Grips end splay end flatness is not more than 0.002mm, guarantees that the high-precision of collet and sleeve is assembled, improves clamping
The precision and chucking power of device;Outer end face bounce in grips end is not more than 0.002mm, and the bounce of clamping end point of shoulder outer circle is little
In 0.002mm, the circle bounce of sleeve splay end right side is not more than 0.002, and outer circle bounce in end is not more than 0.002 to sleeve first in parallel,
Guarantee the clamping device accuracy of form and position in high-speed rotation process and balance quality.
Embodiment 2
The detection of dynamic balancing precision is carried out to the clamping device that number is respectively S1, S2, S3, S4, S5, S6, S7 and S8.
Test apparatus: Magnetic Force Mill, supersonic wave cleaning machine, high-pressure washer, ZMI balancing machine, hand press, three rich
Board dial test indicator (1 μm of precision), directly be respectively 0.997mm, 1.197mm, 1.497mm, 1.997mm, 2.997mm,
The specification stick of 4.997mm, 5.997mm and 7.997mm.
Detection method: on ZMI balancing machine, being driven by electric motor and rotated, and precision measurement instrument dial test indicator (essence is utilized
Degree μm) concentricity detection is carried out, test result is shown in Table 3.
Table 3
Remarks: difference is the difference of single concentricity precision maxima and minima.
Seen from table 3, the utility model embodiment number is the clamping device of S1, S2, S3, S4, S5, S6, S7 and S8,
When carrying out the detection of dynamic balancing precision, concentricity precision single measurements are not more than 4 μm, and each number sample is repeatedly being surveyed
When amount, the difference of concentricity precision maxima and minima is not more than 3 μm.Therefore, the clamping dress of the utility model embodiment
It sets itself and is remarkably improved detection accuracy when clamping workpiece carries out dynamic balancing measurement detection with excellent balance quality.
Embodiment 3
Use shaft-like (with keyway) part that number is 2mm to diameter under same clamped condition for the clamping device of S4
Both ends carry out grinding, multiple groups measurement, and sample precision see the table below 4.
Table 4
Embodiment 4
Use the shaft-like that number is 2mm to diameter under same clamped condition for the clamping device of S4 (with the form of gear tooth)
Part both ends carry out grinding, multiple groups measurement, and sample precision see the table below 5.
Table 5
Embodiment 5
Use shaft-like (with keyway) part that number is 3mm to diameter under same clamped condition for the clamping device of S5
Both ends carry out grinding, multiple groups measurement, and sample precision see the table below 6.
Table 6
Embodiment 6
Use the shaft-like that number is 6mm to diameter under same clamped condition for the clamping device of S7 (with the form of gear tooth)
Part both ends carry out grinding, multiple groups measurement, and sample precision see the table below 7.
Table 7
Embodiment 7
Use the shaft-like that number is 8mm to diameter under same clamped condition for the clamping device of S8 (with the form of gear tooth)
Part both ends carry out grinding, multiple groups measurement, and sample precision see the table below 8.
Table 8
The utility model embodiment compared with the existing technology, may be implemented to have the superhigh precision of excellent dynamic balance performance to press from both sides
Device is held, and is able to achieve the superhigh precision clamping to special-shaped non-standard component, and the service life of clamping device can be significantly improved.
Above-described specific embodiment, to the purpose of this utility model, technical scheme and beneficial effects carried out into
One step is described in detail, it should be understood that being not used to limit the foregoing is merely specific embodiment of the present utility model
Determine the protection scope of the utility model, within the spirit and principle of the utility model, any modification for being made equally is replaced
It changes, improve, should be included within the scope of protection of this utility model.