CN109590773B - Positioning device with flexible structure and positioning method thereof - Google Patents
Positioning device with flexible structure and positioning method thereof Download PDFInfo
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- CN109590773B CN109590773B CN201811368444.5A CN201811368444A CN109590773B CN 109590773 B CN109590773 B CN 109590773B CN 201811368444 A CN201811368444 A CN 201811368444A CN 109590773 B CN109590773 B CN 109590773B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
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Abstract
A positioning device with a flexible structure and a positioning method thereof are provided, wherein the positioning device with the flexible structure is arranged on a chuck; the positioning device with a flexible structure is contacted with the positioning inclined plane of the positioning teeth through the groove edge of the positioning groove 5; a small gap is reserved between the Z-direction positioning surface 3 of the positioning device with the flexible structure and the Z-direction positioning surface of the chuck; the middle of the positioning device with a flexible structure is provided with a threaded through hole, and a blind rivet is arranged on the threaded through hole; tensioning the blind rivet by using a tensioning device, and moving the positioning device to the direction of the chuck until the Z-direction positioning surface of the chuck is tightly attached to the Z-direction positioning surface 3 of the positioning device with a flexible structure; when the bottom of the positioning device positioning groove 5 with a flexible structure moves towards the direction of the positioning teeth, the U-shaped notch 10 deforms, and the bottom opening of the positioning groove expands; the part below the U-shaped notch 10 on the positioning inclined surface of the positioning groove 5 is tightly attached to the positioning inclined surface of the positioning tooth to clamp the positioning tooth, so that the positioning device with a flexible structure and the chuck are positioned at high precision.
Description
Technical Field
The invention relates to the technical field of positioning and clamping between a machine tool and a workpiece in precision machine manufacturing, in particular to a positioning device with a flexible structure and a positioning method thereof.
Background
The prior art device needs to be positioned in two directions simultaneously, so that two or more than two connecting devices need to be combined for use, and the installation requirement of the combined device is high. And the clamp pin is only suitable for middle and large-sized parts with lower precision, and the clamping pin and the central hole are greatly abraded and have shorter service life because the positioning is rigid. The prior art also has the defects that the surface area of the finish machining is large, the machining is difficult and the cost is high, and the grooves can generate stress concentration when being deformed, so that the service life is influenced.
In summary, the existing device has the disadvantages of large surface area for finish machining and large machining difficulty; when the tension device works, abrasion or stress concentration is easy to generate in the process of positioning and assembling at the same time, and the service life of the supporting plate is influenced.
Disclosure of Invention
The technical problem solved by the invention is as follows: the positioning device with the flexible structure and the positioning method thereof overcome the defects of the prior art, the surface area needing finish machining is small, the machining efficiency is improved, and the machining difficulty and the machining cost are reduced; stress distribution is even in the positioning process, and the structure utilization rate is higher. The service life of the positioning device is prolonged.
The technical scheme of the invention is as follows: a positioning device with a flexible structure, comprising: the device comprises a working supporting plate (1), a Z-direction positioning surface (3), a circular boss (4), a positioning groove (5), a positioning inclined surface (7), a through groove (9), a U-shaped notch (10) and a reinforcing structure (11);
the working supporting plate (1) is connected with the chuck (2) through a connecting device for positioning, and a circular boss (4) is arranged below the working supporting plate (1); the bottom surface of the circular boss (4) is a Z-direction positioning surface of the working supporting plate (1), and a plurality of positioning grooves (5) which are uniformly distributed in the circumferential direction are formed in the Z-direction positioning surface (3); the side wall of the positioning groove is provided with a bulge and a positioning inclined surface (7) which is opposite to the bulge; two sides of each positioning groove (5) are respectively provided with a through groove (9), a U-shaped notch (10) facing the through groove (9) is arranged on the groove wall between the positioning groove (5) and the through groove (9), and the center of the bottom of the supporting plate is provided with a reinforcing structure (11).
The working supporting plate (1) comprises a large cylinder and a small cylinder, the upper surface of the large cylinder is the upper end surface (12) of the supporting plate, the edge of the upper end surface of the large cylinder is provided with an annular boss protruding outwards in the radial direction, and the other end surface of the large cylinder and the upper end surface of the small cylinder are connected and integrally processed; through holes (13) are arranged on the central axes of the large cylinder and the small cylinder, the small cylinder is a circular boss (4), and the Z-direction positioning surface 3 is the lower end surface of the small cylinder, namely the bottom surface.
The positioning grooves (5) are located on the Z-direction positioning face (3), a plurality of uniformly distributed positioning grooves (5) are arranged in the diameter direction of the Z-direction positioning face (3), and the positioning grooves (5) are rectangular grooves.
The middle part of the positioning groove (5) is provided with a positioning inclined plane (7) which protrudes inwards, the section of the position, provided with the positioning inclined plane, in the positioning groove (5) is in an isosceles trapezoid shape, the short side of the trapezoid is a groove bottom, and the long side of the trapezoid is a notch;
through grooves (9) are formed in the two sides of each positioning groove (5), and the through grooves (9) are rectangular grooves.
A circular groove is formed in the center of the Z-direction positioning surface (3) of the circular boss (4); the through hole (13) is positioned in the center of the circular groove and is an internal thread hole.
The central reinforcing structure (11) at the bottom of the supporting plate is provided with a circular groove bottom bulge from the Z direction to the central position of the positioning surface (3), and the height of the bulge is lower than the groove depth of the circular groove.
The central reinforcing structure 11 at the bottom of the plate is of an annular structure, the annular structure is provided with protruding reinforcing ribs which are uniformly distributed around, and the reinforcing ribs extend to the inner wall of the circular groove at the central position of the Z-direction positioning surface (3).
The work supporting plate (1) is made of stainless steel 4Cr 13.
The invention relates to a positioning method of a positioning device with a flexible structure, which comprises the following steps:
(1) placing a positioning device with a flexible structure on a chuck; the positioning device with a flexible structure is contacted with the positioning inclined plane of the positioning teeth through the groove edge of the positioning groove (5);
(2) the clearance between the Z-direction positioning surface (3) of the positioning device with the flexible structure and the Z-direction positioning surface of the chuck is 0.2-0.3 mm;
(3) a blind rivet is arranged on a through hole in the middle of the positioning device with a flexible structure;
(4) tensioning the blind rivet by using a tensioning device to ensure that the Z-direction positioning surface of the chuck is tightly attached to the Z-direction positioning surface (3) of the positioning device with a flexible structure;
(5) in the process that the bottom of a positioning device positioning groove (5) with a flexible structure moves towards the positioning tooth, a U-shaped notch (10) deforms, and the opening of the positioning groove expands (namely the groove of the positioning groove widens along the straight line distance);
(6) the part below the U-shaped notch on the positioning inclined plane of the positioning groove is tightly attached to the positioning inclined plane of the positioning tooth, so that the positioning of the positioning device with a flexible structure and the chuck is realized.
Compared with the prior art, the invention has the advantages that:
(1) a working supporting plate (1) is connected with a chuck (2) through a connecting device for positioning, and a circular boss (4) is arranged below the working supporting plate (1); the bottom surface of the circular boss (4) is a Z-direction positioning surface of the working supporting plate (1), and a plurality of positioning grooves (5) which are uniformly distributed in the circumferential direction are formed in the Z-direction positioning surface (3); the side wall of the positioning groove is provided with a bulge and a positioning inclined surface (7) which is opposite to the bulge; two sides of each positioning groove (5) are respectively provided with a through groove (9), a U-shaped notch (10) facing the through groove (9) is arranged on the groove wall between the positioning groove (5) and the through groove (9), and the center of the bottom of the supporting plate is provided with a reinforcing structure (11). The quick and accurate positioning of the machined part of the machine tool in the working process can be realized.
(2) In the positioning process, the positioning working surface of the positioning groove inclined surface (7) is positioned at the lower part of the positioning inclined surface, and only the fine machining is needed to be carried out on the lower part of the positioning groove inclined surface in the machining process. The surface area needing finish machining is small, the machining efficiency is improved, and the machining difficulty and the machining cost are reduced;
(3) by arranging the U-shaped notch 10, the stress distribution is uniform in the positioning process, and the structural utilization rate is high.
(4) The central reinforcing structure 11 at the bottom of the plate is of an annular structure, the annular structure is provided with protruding reinforcing ribs which are uniformly distributed towards the periphery, and the reinforcing ribs extend to the inner wall of the circular groove at the central position of the Z-direction positioning surface (3). The rigidity of the positioning device with the flexible structure is ensured, and the deformation of the positioning device caused by the tensioning device is reduced.
(5) The surface area needing finish machining is small, the machining efficiency is improved, and the machining difficulty and the machining cost are reduced; stress distribution is even in the positioning process, and the structure utilization rate is higher. The service life of the positioning device is prolonged. The reinforcing structure is arranged, so that the rigidity of the positioning device with the flexible structure is ensured, and the deformation of the positioning device caused by the tensioning device is reduced.
Drawings
Figure 1 is a side view of a work pallet of the present invention.
Figure 2 is a bottom view of the work pallet of the present invention.
Fig. 3 is a schematic view of the connection of the work pallet to the chuck base when unlocked.
Fig. 4 is a schematic view of the connection of the work pallet and the chuck base during locking.
Detailed Description
The invention is described in further detail below with reference to the figures and specific embodiments.
The invention relates to a positioning device with a flexible structure and a positioning method thereof, wherein the positioning device with the flexible structure is arranged on a chuck; the positioning device with a flexible structure is contacted with the positioning inclined plane of the positioning teeth through the groove edge of the positioning groove 5; a small gap is reserved between the Z-direction positioning surface 3 of the positioning device with the flexible structure and the Z-direction positioning surface of the chuck; the middle of the positioning device with a flexible structure is provided with a threaded through hole, and a blind rivet is arranged on the threaded through hole; tensioning the blind rivet by using a tensioning device, and moving the positioning device to the direction of the chuck until the Z-direction positioning surface of the chuck is tightly attached to the Z-direction positioning surface 3 of the positioning device with a flexible structure; when the bottom of the positioning device positioning groove 5 with a flexible structure moves towards the direction of the positioning teeth, the U-shaped notch 10 deforms, and the bottom opening of the positioning groove expands; the part below the U-shaped notch 10 on the positioning inclined surface of the positioning groove 5 is tightly attached to the positioning inclined surface of the positioning tooth to clamp the positioning tooth, so that the positioning device with a flexible structure and the chuck are positioned at high precision.
The invention relates to a positioning device with a flexible structure, which comprises a working supporting plate (1), a Z-direction positioning surface (3), a circular boss (4), a positioning groove (5), a positioning inclined surface (7), a through groove (9), a U-shaped notch (10) and a reinforcing structure (11);
the working supporting plate (1) is connected with the chuck (2) through a connecting device for positioning, and a circular boss (4) is arranged below the working supporting plate (1); the bottom surface of the circular boss (4) is a Z-direction positioning surface of the working supporting plate (1), and a plurality of positioning grooves (5) which are uniformly distributed in the circumferential direction are formed in the Z-direction positioning surface (3); the side wall of the positioning groove is provided with a bulge and a positioning inclined surface (7) which is opposite to the bulge; two sides of each positioning groove (5) are respectively provided with a through groove (9), a U-shaped notch (10) facing the through groove (9) is arranged on the groove wall between the positioning groove (5) and the through groove (9), and the center of the bottom of the supporting plate is provided with a reinforcing structure (11).
Fig. 1 and 2 show a schematic structural view of a work pallet 1 according to the present invention. The working supporting plate (1) comprises a large cylinder and a small cylinder, wherein the axial direction of the cylinder is defined as the Z direction of a coordinate system, and the end face of the cylinder is defined as an XOY plane of the coordinate system. The upper surface of the large cylinder is the upper end surface (12) of the supporting plate, the edge of the upper end surface of the large cylinder is provided with an annular boss which protrudes outwards along the radial direction, and the other end surface of the large cylinder and the upper end surface of the small cylinder are connected and integrally processed; through holes (13) are arranged on the central axes of the large cylinder and the small cylinder, the small cylinder is a circular boss (4), and the Z-direction positioning surface 3 is the lower end surface of the small cylinder, namely the bottom surface. The material of the work pallet (1) is preferably stainless steel 4Cr 13.
The constant head tank 5 is located Z to locating surface 3, is equipped with the constant head tank 5 of a plurality of equipartitions along the diameter direction of Z to locating surface 3, and constant head tank 5 is the rectangular channel. The middle part of the positioning groove 5 is provided with a positioning inclined plane (7) which protrudes inwards, the section of the position of the positioning inclined plane in the positioning groove 5 is in an isosceles trapezoid shape, the short side of the trapezoid is the groove bottom, and the long side of the trapezoid is the notch; through grooves (9) are formed in the two sides of each positioning groove (5), each through groove (9) is a rectangular groove, and a circular groove is formed in the center of the Z-direction positioning surface (3) of each circular boss (4); the through hole (13) is positioned in the center of the circular groove and is an internal thread hole. The central reinforcing structure (11) at the bottom of the supporting plate is provided with a circular groove bottom bulge from the Z direction to the central position of the positioning surface (3), and the height of the bulge is lower than the groove depth of the circular groove.
The central reinforcing structure 11 at the bottom of the plate is of an annular structure, the annular structure is provided with protruding reinforcing ribs which are uniformly distributed around, and the reinforcing ribs extend to the inner wall of the circular groove at the central position of the Z-direction positioning surface (3). The reinforcing structure 11 ensures the rigidity of the positioning device with a flexible structure, when the tensioning device locks the blind rivet, the blind rivet can cause the center of the upper end surface (12) of the supporting plate to be concave, and the reinforcing structure 11 can ensure the flatness of the upper end surface of the supporting plate when the tensioning device is locked. The thickness of the U-shaped notch (10) between the through groove (9) and the positioning groove (5), namely the thickness of the thinnest part of the groove wall between the through groove (9) and the positioning groove (5), namely the position of the arc end of the U-shaped notch, is 0.5-1.5 mm. The U-shaped notch can be flexibly deformed in the positioning process, the length of the U-shaped notch is consistent with that of the positioning groove (5), stress distribution is uniform in the positioning process, the structural utilization rate is high, and the service life of the positioning device is prolonged
The upper end surface (12) of the supporting plate is connected with a workpiece to be processed, and the workpiece to be processed needs to have a surface matched with the upper end surface (12) of the supporting plate. The workpiece to be processed comprises a shaft and a cube, and when the workpiece to be processed is the shaft, one end face of the shaft is connected with the upper end face (12) of the supporting plate; when the processing is cubic, one surface of the cubic is connected with the upper end surface (12) of the supporting plate.
The machine tool is provided with a chuck which is a cylinder, the lower end surface of the chuck is connected with the machine tool, and the upper end surface of the chuck is provided with positioning teeth. The positioning teeth protrude from the upper end face of the chuck and are uniformly distributed along the circumferential direction, the protrusions are in the shape of a strip with an isosceles trapezoid cross section, and the positioning teeth are matched with a positioning inclined surface (7) of a positioning groove (5) of a positioning device with a flexible structure; two side surfaces of the positioning teeth, namely two inclined edges of the isosceles trapezoid are positioning inclined surfaces; a Z-direction positioning surface protruding from the upper end surface of the chuck is arranged between every two positioning teeth, and the height of the Z-direction positioning surface is far lower than the height of the positioning teeth, namely the height of the isosceles trapezoid. The positioning device with the flexible structure is matched with the positioning teeth of the chuck through the positioning groove (5), and the included angle formed by the positioning inclined planes (7) on the two sides in the positioning groove (5) is preferably 1-2 degrees smaller than the positioning inclined planes of the positioning teeth.
In the positioning process, the positioning working face of the positioning groove inclined face (7) is positioned at the lower part of the positioning inclined face, and only the fine machining is needed to be carried out on the lower part of the positioning groove inclined face in the machining process. The surface area needing finish machining is reduced, the machining efficiency is improved, and the machining difficulty and the machining cost are reduced. The wall thickness of the U-shaped notch (10) between the through groove (9) and the positioning groove (5), namely the thickness of the thinnest part of the groove wall between the through groove (9) and the positioning groove (5), namely the position of the arc end of the U-shaped notch, is preferably 0.5 mm-1.5 mm. The upper end surface (12) of the supporting plate is connected with a workpiece to be processed, and the workpiece to be processed needs to have a surface matched with the upper end surface (12) of the supporting plate.
The workpiece to be processed comprises a shaft and a cube, and when the workpiece to be processed is the shaft, one end face of the shaft is connected with the upper end face (12) of the supporting plate; when the processing is cubic, one surface of the cubic is connected with the upper end surface (12) of the supporting plate. The machine tool is provided with a chuck which is a cylinder, the lower end surface of the chuck is connected with the machine tool, and the upper end surface of the chuck is provided with positioning teeth. The positioning teeth protrude from the upper end face of the chuck and are uniformly distributed along the circumferential direction, the protrusions are in the shape of a strip with an isosceles trapezoid cross section, and the positioning teeth are matched with a positioning inclined surface (7) of a positioning groove (5) of a positioning device with a flexible structure;
two side surfaces of the positioning teeth, namely two inclined edges of the isosceles trapezoid are positioning inclined surfaces; a Z-direction positioning surface protruding from the upper end surface of the chuck is arranged between every two positioning teeth, and the height of the Z-direction positioning surface is far lower than the height of the positioning teeth, namely the height of the isosceles trapezoid.
The positioning device with the flexible structure is matched with the positioning teeth of the chuck through the positioning groove (5), and the included angle formed by the positioning inclined planes (7) on the two sides in the positioning groove (5) is preferably 1-2 degrees smaller than the positioning inclined planes of the positioning teeth. In the positioning process, the positioning working surface of the positioning groove inclined surface (7) is positioned at the lower part of the positioning inclined surface, and only the fine machining can be carried out on the lower part of the positioning groove inclined surface in the machining process.
Fig. 3 is a schematic view showing the connection between the work pallet and the chuck base when unlocked. When the work supporting plate 1 is connected with the chuck 2 and the connecting device does not lock the work supporting plate 1 and the chuck 2, a certain gap exists between the Z-axis positioning surface 3 and the Z-axis reference surface 12. The two side surfaces of the 4 positioning grooves 5 on the supporting plate are inclined surfaces, and the width of the lower end of each positioning groove 5 is larger than that of the upper end. Two side surfaces of 4 positioning teeth 6 on the chuck are also inclined surfaces, and the width of the lower end of each positioning tooth 6 is larger than that of the upper end of each positioning tooth. The slope of the side surface 7 of the positioning groove is slightly larger than that of the side surface 8 of the positioning tooth, and the width of the bottom of the positioning groove 5 is slightly smaller than that of the root of the positioning tooth 6. When the connecting device is not tensioned, the side surface 7 of the positioning groove is in line contact with the side surface 8 of the matched positioning tooth.
Fig. 4 shows a schematic view of the connection of the work pallet and the chuck base during locking. When the connecting device locks the working supporting plate 1 and the chuck 2, a gap does not exist between the Z-axis positioning surface 3 and the Z-axis reference surface 4, the two working surfaces are tightly attached, the gap is 0, the U-shaped notch 10 is deformed and outwardly bent, and the inclination of the inclined surface at the lower part of the U-shaped notch 10 of the positioning groove 5 is changed and is equal to the inclination of the inclined surfaces at the two sides of the positioning tooth. The side surface 7 of the positioning groove is completely attached to the two side surfaces 8 of the positioning teeth to form surface contact.
The chuck is positioned with the working supporting plate to provide a positioning reference for the supporting plate. The connecting device and the connected device lock the working supporting plate and the chuck base body, so that no gap exists between the Z-axis positioning surface of the working supporting plate and the Z-axis reference surface of the chuck base body.
The positioning device of the invention is a work supporting plate 1 which is connected with a chuck 2 through a connecting device for positioning. For Z-direction positioning, the supporting plate is positioned through a Z-direction positioning surface 3, wherein the Z-direction positioning surface 3 of the workpiece supporting plate is the end surface of a lower circular boss 4; for circumferential positioning, 4 positioning grooves 5 which are circumferentially and uniformly distributed are arranged in the boss 4 and are matched with the positioning teeth 6 on the corresponding chuck 2. The side 7 of constant head tank has certain inclination, and the 7 inclinations in side of constant head tank are slightly bigger than 8 inclinations in location flank, and the bottom width of constant head tank 5 is slightly littleer than the root width of location tooth 6, and logical groove 9 has all been opened on the both sides of every constant head tank 5, and the U type breach 10 that has the logical groove towards 5 both sides of constant head tank, and the wall thickness that logical groove 9 and constant head tank 5 were located to U type breach 10 is 0.5 ~ 1.5 mm. The center of the bottom of the supporting plate is provided with a reinforcing structure 11, so that the flatness of the upper end surface 12 when the supporting plate is connected is ensured.
The end face of the working supporting plate 1 is circular, and a threaded hole 13 is formed in the center of the supporting plate 1 and used for installing a connecting device. The outer ring of the lower end of the working supporting plate 1 is provided with a circular boss 4, the end face of the circular boss 4 is provided with 4 positioning grooves 5 along the radial direction, the central lines of the 4 positioning grooves 5 point to the center of the working supporting plate, and the end face of the circular boss is divided into four faces which are four Z-axis positioning faces 3 respectively. The Z-axis positioning surface 3 is positioned at the bottommost part of the working supporting plate 1 and is matched with the Z-axis reference surface 12 on the chuck to perform Z-direction positioning. The central position of the inner ring of the circular boss 4 is distributed with a reinforcing structure 11 which can ensure the flatness of the upper end surface 12 of the supporting plate when the connecting device is tensioned. The workpiece supporting plate 1 is made of rustproof steel, is integrally formed in one step, such as integrally cutting and casting, and can be subjected to a heat treatment process if needed.
When the work supporting plate 1 is connected with the chuck 2 and the connecting device does not lock the work supporting plate 1 and the chuck 2, a certain gap exists between the Z-axis positioning surface 3 and the Z-axis reference surface 12. The two side surfaces of the 4 positioning grooves 5 on the supporting plate are inclined surfaces, and the width of the lower end of each positioning groove 5 is larger than that of the upper end. Two side surfaces of 4 positioning teeth 6 on the chuck are also inclined surfaces, and the width of the lower end of each positioning tooth 6 is larger than that of the upper end of each positioning tooth. The slope of the side surface 7 of the positioning groove is slightly larger than that of the side surface 8 of the positioning tooth, and the width of the bottom of the positioning groove 5 is slightly smaller than that of the root of the positioning tooth 6. When the connecting device is not tensioned, the side surface 7 of the positioning groove is in line contact with the side surface 8 of the matched positioning tooth. When the connecting device locks the working supporting plate 1 and the chuck 2, a gap does not exist between the Z-axis positioning surface 3 and the Z-axis reference surface 4, the two working surfaces are tightly attached, the gap is 0, the U-shaped notch 10 is deformed and outwardly bent, and the inclination of the inclined surface at the lower part of the U-shaped notch 10 of the positioning groove 5 is changed and is equal to the inclination of the inclined surfaces at the two sides of the positioning tooth. The side surface 7 of the positioning groove is completely attached to the two side surfaces 8 of the positioning teeth to form surface contact.
The end face of the working supporting plate 1 is circular, and a threaded hole 13 is formed in the center of the supporting plate 1 and used for installing a connecting device. The outer ring of the lower end of the working supporting plate 1 is provided with a circular boss 4, the end face of the circular boss 4 is provided with 4 positioning grooves 5 along the radial direction, the central lines of the 4 positioning grooves 5 point to the center of the working supporting plate, and the end face of the circular boss is divided into four faces which are four Z-axis positioning faces 3 respectively. The Z-axis positioning surface 3 is positioned at the bottommost part of the working supporting plate 1 and is matched with the Z-axis reference surface 12 on the chuck to perform Z-direction positioning. The central position of the inner ring of the circular boss 4 is distributed with a reinforcing structure 11 which can ensure the flatness of the upper end surface 12 of the supporting plate when the connecting device is tensioned. The workpiece supporting plate 1 is made of rustproof steel, is integrally formed in one step, such as integrally cutting and casting, and can be subjected to a heat treatment process if needed.
When the work supporting plate 1 is connected with the chuck 2 and the connecting device does not lock the work supporting plate 1 and the chuck 2, a certain gap exists between the Z-axis positioning surface 3 and the Z-axis reference surface 12. The two side surfaces of the 4 positioning grooves 5 on the supporting plate are inclined surfaces, and the width of the lower end of each positioning groove 5 is larger than that of the upper end. Two side surfaces of 4 positioning teeth 6 on the chuck are also inclined surfaces, and the width of the lower end of each positioning tooth 6 is larger than that of the upper end of each positioning tooth. The slope of the side surface 7 of the positioning groove is slightly larger than that of the side surface 8 of the positioning tooth, and the width of the bottom of the positioning groove 5 is slightly smaller than that of the root of the positioning tooth 6. When the connecting device is not tensioned, the side surface 7 of the positioning groove is in line contact with the side surface 8 of the matched positioning tooth.
When the connecting device locks the working supporting plate 1 and the chuck 2, a gap does not exist between the Z-axis positioning surface 3 and the Z-axis reference surface 4, the two working surfaces are tightly attached, the gap is 0, the U-shaped notch 10 is deformed and outwardly bent, and the inclination of the inclined surface at the lower part of the U-shaped notch 10 of the positioning groove 5 is changed and is equal to the inclination of the inclined surfaces at the two sides of the positioning tooth. The side surface 7 of the positioning groove is completely attached to the two side surfaces 8 of the positioning teeth to form surface contact.
The chuck is positioned with the working supporting plate to provide a positioning reference for the supporting plate. The connecting device and the connected device lock the working supporting plate and the chuck base body, so that no gap exists between the Z-axis positioning surface of the working supporting plate and the Z-axis reference surface of the chuck base body.
The invention relates to a positioning method of a positioning device with a flexible structure, which comprises the following steps:
(1) placing a positioning device with a flexible structure on a chuck; the positioning device with a flexible structure is contacted with the positioning inclined plane of the positioning teeth through the groove edge of the positioning groove (5);
(2) the clearance between the Z-direction positioning surface (3) of the positioning device with the flexible structure and the Z-direction positioning surface of the chuck is 0.2-0.3 mm;
(3) a blind rivet is arranged on a through hole in the middle of the positioning device with a flexible structure;
(4) tensioning the blind rivet by using a tensioning device to ensure that the Z-direction positioning surface of the chuck is tightly attached to the Z-direction positioning surface (3) of the positioning device with a flexible structure;
(5) in the process that the bottom of a positioning device positioning groove (5) with a flexible structure moves towards the positioning tooth, a U-shaped notch (10) deforms, and the opening of the positioning groove expands (namely the groove of the positioning groove widens along the straight line distance);
(6) the part below the U-shaped notch on the positioning inclined plane of the positioning groove is tightly attached to the positioning inclined plane of the positioning tooth, so that the positioning of the positioning device with a flexible structure and the chuck is realized.
In the positioning process, the positioning working surface of the positioning groove inclined surface (7) is positioned at the lower part of the positioning inclined surface, and only the fine machining is needed to be carried out on the lower part of the positioning groove inclined surface in the machining process. The surface area needing finish machining is small, the machining efficiency is improved, and the machining difficulty and the machining cost are reduced; through setting up U-shaped breach 10, stress distribution is even among the positioning process, and structure utilization is higher. The central reinforcing structure 11 at the bottom of the plate is of an annular structure, the annular structure is provided with protruding reinforcing ribs which are uniformly distributed towards the periphery, and the reinforcing ribs extend to the inner wall of the circular groove at the central position of the Z-direction positioning surface (3). The rigidity of the positioning device with the flexible structure is ensured, and the deformation of the positioning device caused by the tensioning device is reduced.
The surface area needing finish machining is small, the machining efficiency is improved, and the machining difficulty and the machining cost are reduced; stress distribution is even in the positioning process, and the structure utilization rate is higher. The service life of the positioning device is prolonged. The reinforcing structure is arranged, so that the rigidity of the positioning device with the flexible structure is ensured, and the deformation of the positioning device caused by the tensioning device is reduced.
Claims (6)
1. A positioning device with a flexible structure, comprising: the device comprises a working supporting plate (1), a Z-axis positioning surface (3), a circular boss (4), a positioning groove (5), a positioning groove inclined surface (7), a through groove (9), a U-shaped notch (10) and a reinforcing structure (11);
the working supporting plate (1) is connected with the chuck (2) through a connecting device for positioning, and a circular boss (4) is arranged below the working supporting plate (1); the bottom surface of the circular boss (4) is a Z-axis positioning surface of the working supporting plate (1), and a plurality of positioning grooves (5) which are uniformly distributed in the circumferential direction are formed in the Z-axis positioning surface (3); the side wall of the positioning groove is provided with a bulge and an opposite positioning groove inclined surface (7); two sides of each positioning groove (5) are respectively provided with a through groove (9), a U-shaped notch (10) facing the through groove (9) is arranged on the groove wall between the positioning groove (5) and the through groove (9), and the center of the bottom of the supporting plate is provided with a reinforcing structure (11);
the middle part of the positioning groove (5) is provided with a positioning groove inclined plane (7) which protrudes inwards, the section of the position, provided with the positioning inclined plane, in the positioning groove (5) is in an isosceles trapezoid shape, the short side of the trapezoid is a groove bottom, and the long side of the trapezoid is a notch;
the central reinforcing structure 11 at the bottom of the plate is of an annular structure, the annular structure is provided with protruding reinforcing ribs which are uniformly distributed towards the periphery, and the reinforcing ribs extend to the inner wall of the circular groove at the central position of the Z-axis positioning surface (3);
the bottom surface of a circular groove formed in the central reinforcing structure (11) at the bottom of the supporting plate at the central position of the Z-axis positioning surface (3) is protruded, and the height of the protrusion is lower than the depth of the circular groove;
the thickness of the U-shaped notch (10) between the through groove (9) and the positioning groove (5), namely the thickness of the thinnest part of the groove wall between the through groove (9) and the positioning groove (5), namely the position of the arc end of the U-shaped notch is 0.5-1.5 mm;
through grooves (9) are formed in the two sides of each positioning groove (5), and the through grooves (9) are rectangular grooves.
2. A positioning device with a flexible structure, according to claim 1, characterized in that: the working supporting plate (1) comprises a large cylinder and a small cylinder, the upper surface of the large cylinder is a Z-axis reference surface (12), the edge of the upper end surface of the large cylinder is provided with an annular boss protruding outwards in the radial direction, and the other end surface of the large cylinder and the upper end surface of the small cylinder are connected and integrally processed; through holes (13) are arranged on the central axes of the large cylinder and the small cylinder, the small cylinder is a circular boss (4), and the Z-axis positioning surface 3 is the lower end surface of the small cylinder, namely the bottom surface.
3. A positioning device with a flexible structure, according to claim 1, characterized in that: the positioning groove (5) is positioned on the Z-axis positioning surface (3), a plurality of uniformly distributed positioning grooves (5) are arranged along the diameter direction of the Z-axis positioning surface (3), and the positioning grooves (5) are rectangular grooves.
4. A positioning device with a flexible structure, according to claim 1, characterized in that: a circular groove is formed in the center of the Z-axis positioning surface (3) of the circular boss (4); the through hole (13) is positioned in the center of the circular groove and is an internal thread hole.
5. A positioning device with a flexible structure, according to claim 1, characterized in that: the work supporting plate (1) is made of stainless steel 4Cr 13.
6. A positioning method of a positioning device with a flexible structure is characterized by comprising the following steps:
(1) placing a positioning device with a flexible structure on a chuck; the positioning device with a flexible structure is contacted with the positioning inclined plane of the positioning teeth through the groove edge of the positioning groove (5); the working supporting plate (1) is connected with the chuck (2) through a connecting device for positioning, and a circular boss (4) is arranged below the working supporting plate (1); the bottom surface of the circular boss (4) is a Z-axis positioning surface of the working supporting plate (1), and a plurality of positioning grooves (5) which are uniformly distributed in the circumferential direction are formed in the Z-axis positioning surface (3); the side wall of the positioning groove is provided with a bulge and an opposite positioning groove inclined surface (7); two sides of each positioning groove (5) are respectively provided with a through groove (9), a U-shaped notch (10) facing the through groove (9) is arranged on the groove wall between the positioning groove (5) and the through groove (9), and the center of the bottom of the supporting plate is provided with a reinforcing structure (11); the middle part of the positioning groove (5) is provided with a positioning groove inclined plane (7) which protrudes inwards, the section of the position, provided with the positioning inclined plane, in the positioning groove (5) is in an isosceles trapezoid shape, the short side of the trapezoid is a groove bottom, and the long side of the trapezoid is a notch; the central reinforcing structure 11 at the bottom of the plate is of an annular structure, the annular structure is provided with protruding reinforcing ribs which are uniformly distributed towards the periphery, and the reinforcing ribs extend to the inner wall of the circular groove at the central position of the Z-axis positioning surface (3); the central reinforcing structure 11 at the bottom of the plate is of an annular structure, the annular structure is provided with protruding reinforcing ribs which are uniformly distributed towards the periphery, and the reinforcing ribs extend to the inner wall of the circular groove at the central position of the Z-axis positioning surface (3); the bottom surface of a circular groove formed in the central reinforcing structure (11) at the bottom of the supporting plate at the central position of the Z-axis positioning surface (3) is protruded, and the height of the protrusion is lower than the depth of the circular groove;
the thickness of the U-shaped notch (10) between the through groove (9) and the positioning groove (5), namely the thickness of the thinnest part of the groove wall between the through groove (9) and the positioning groove (5), namely the position of the arc end of the U-shaped notch is 0.5-1.5 mm;
through grooves (9) are formed in the two sides of each positioning groove (5), and the through grooves (9) are rectangular grooves;
(2) the clearance between the Z-axis positioning surface (3) of the positioning device with the flexible structure and the Z-axis positioning surface of the chuck is adjusted to be 0.2-0.3 mm;
(3) installing a blind rivet on a through hole in the middle of the positioning device with a flexible structure;
(4) tensioning the blind rivet by using a tensioning device to ensure that the Z-axis positioning surface of the chuck is tightly attached to the Z-axis positioning surface (3) of the positioning device with a flexible structure;
(5) in the process that the bottom of a positioning groove (5) of the positioning device with a flexible structure moves towards the positioning tooth, a U-shaped notch (10) deforms, and the opening of the positioning groove expands;
(6) the part below the U-shaped notch on the positioning inclined plane of the positioning groove is tightly attached to the positioning inclined plane of the positioning tooth, so that the positioning of the positioning device with a flexible structure and the chuck is realized.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811368444.5A CN109590773B (en) | 2018-11-16 | 2018-11-16 | Positioning device with flexible structure and positioning method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811368444.5A CN109590773B (en) | 2018-11-16 | 2018-11-16 | Positioning device with flexible structure and positioning method thereof |
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| CN109590773B true CN109590773B (en) | 2021-06-11 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1354708A (en) * | 2000-04-10 | 2002-06-19 | 帕斯卡株式会社 | Tool holder |
| CN101704200A (en) * | 2009-09-25 | 2010-05-12 | 上海麦迅机床工具技术有限公司 | Resetting device using flexible positioning and rigid clamping in combination and positioning method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2424868Y (en) * | 2000-04-06 | 2001-03-28 | 薛跃龙 | Flexible repeat positioning device for clamp |
| DE102005030820B3 (en) * | 2005-07-01 | 2006-08-17 | Ott-Jakob Gmbh & Co. Spanntechnik Kg | Tensioning device e.g. for removable connection of two machine parts, has machine part having clamping unit and cooperating counterpart in second machine part with unit having axially adjustable clamping element and plier elements |
| CN201049428Y (en) * | 2007-05-30 | 2008-04-23 | 薛俊伦 | Flexible deformability rigid repetition accurate positioning device |
| CN102152149B (en) * | 2011-05-12 | 2013-05-29 | 上海麦迅机床工具技术有限公司 | High rigidity and flexibility locating clamp and locating method of locating clamp |
| CN204053516U (en) * | 2014-07-01 | 2014-12-31 | 西安斯诺机械智能科技有限公司 | The flexible quick change supporting plate of a kind of high accuracy |
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2018
- 2018-11-16 CN CN201811368444.5A patent/CN109590773B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1354708A (en) * | 2000-04-10 | 2002-06-19 | 帕斯卡株式会社 | Tool holder |
| CN101704200A (en) * | 2009-09-25 | 2010-05-12 | 上海麦迅机床工具技术有限公司 | Resetting device using flexible positioning and rigid clamping in combination and positioning method thereof |
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