CN112719969A - Large-scale thin wall spare damping clamping frock - Google Patents
Large-scale thin wall spare damping clamping frock Download PDFInfo
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- CN112719969A CN112719969A CN202011341526.8A CN202011341526A CN112719969A CN 112719969 A CN112719969 A CN 112719969A CN 202011341526 A CN202011341526 A CN 202011341526A CN 112719969 A CN112719969 A CN 112719969A
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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
The invention provides a large thin-wall part vibration reduction clamping tool which is used for solving the technical problems that an existing thin-wall part clamp is complex in structure, inconvenient to install and disassemble, low in positioning precision, poor in clamping quality, prone to self-excited vibration, and incapable of meeting clamping use requirements of thin-wall workpieces of different sizes due to deformation of the thin-wall workpieces caused by the material state, thermal stress in the machining process and the like. The thin-wall workpiece positioning device comprises a positioning base plate, wherein a thin-wall workpiece is arranged on the positioning base plate, a pressing component is arranged at the upper part of the thin-wall workpiece, a main pull rod is axially arranged in the thin-wall workpiece, two ends of the main pull rod are respectively fixedly connected with the positioning base plate and the pressing component, a plurality of groups of tightening components are arranged on the main pull rod, and the tightening components are matched with the thin-wall workpiece. The invention can not only improve the positioning and clamping quality of the thin-wall workpiece, but also relieve the self-excited vibration in the processing process, and avoid the deformation of the thin-wall workpiece caused by the material state, the thermal stress in the processing process and other reasons.
Description
Technical Field
The invention relates to the technical field of machining clamps, in particular to a large thin-walled part vibration reduction clamping tool.
Background
The large-scale revolving body thin-wall part is widely applied to the engineering machinery industry, has the characteristics of light weight, compact structure, material saving and the like, and plays an important role in mechanical assembly, so that higher dimensional precision and surface roughness are required to be ensured during processing. However, the large-scale revolving body thin-wall part has poor rigidity and strength due to large diameter and thin wall thickness, is easy to deform and vibrate under the action of clamping force and cutting force, is difficult to control the size precision of the part, is difficult to ensure the surface roughness and has poor processing manufacturability. The existing thin-wall workpiece clamp is complex in overall structure, inconvenient to mount and dismount, low in positioning accuracy, poor in clamping quality, easy to generate self-excited vibration in the machining process, easy to deform due to the material state of the thin-wall workpiece and the thermal stress in the machining process and the like, and the whole clamp cannot meet the clamping use requirements of thin-wall workpieces of different sizes.
Disclosure of Invention
The invention provides a large thin-wall part vibration reduction clamping tool, aiming at the technical problems that the existing thin-wall part clamp is complex in structure, inconvenient to mount and dismount, low in positioning precision, poor in clamping quality, prone to self-excited vibration and deformation, incapable of meeting clamping use requirements of thin-wall parts of different sizes and the like.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a large-scale thin wall spare damping clamping frock, includes the location base plate, be provided with the thin wall work piece on the location base plate, the upper portion of thin wall work piece is provided with compresses tightly the subassembly, and the inside axial of thin wall work piece is provided with main pull rod, and the both ends of main pull rod respectively with the location base plate with compress tightly subassembly fixed connection, and be provided with a plurality of groups on the main pull rod and prop tight subassembly, prop tight subassembly and thin wall work piece and cooperate.
The tightening component is at least provided with 2 groups and is respectively positioned at the upper part and the lower part of the main pull rod; the main pull rod is sleeved with a supporting spring, and the supporting spring is positioned between the 2 groups of tightening components.
The tightening component comprises a stretching rod, a tension spring and a component base body, the component base body is sleeved on the main pull rod, the stretching rod is perpendicular to the main pull rod, one end of the stretching rod is fixedly connected with the component base body, and the other end of the stretching rod is matched with the thin-wall workpiece; the supporting spring is sleeved on the stretching rod.
The stretching rods are of a three-section type telescopic structure, each group of stretching assemblies comprises 3 stretching rods, and the 3 stretching rods are circumferentially and uniformly fixed on the assembly base body.
The compression assembly comprises a positioning pressing plate and a locking nut, the upper end of the main pull rod is provided with an external thread matched with the locking nut, and the main pull rod is in threaded connection with the locking nut; the positioning pressing plate is arranged on the upper portion of the thin-wall workpiece and fixed through a locking nut, and a through hole is formed in the positioning pressing plate.
The lower extreme of main pull rod is equipped with the external screw thread, is equipped with on the location base plate with main pull rod assorted screw hole, main pull rod and location base plate threaded connection.
The positioning substrate is provided with an inner positioning table and an outer positioning table which are staggered inside and outside, and the inner positioning table and the outer positioning table are both matched with the thin-wall workpiece; positioning holes are formed in the inner positioning table and the thin-wall workpiece, and the inner positioning table and the thin-wall workpiece are fixed through positioning pins.
The invention has the beneficial effects that: 1. the contact form between the tightening component and the thin-wall workpiece is changed to adapt to the profile structures of clamping parts of different thin-wall workpieces, so that the thin-wall workpiece support device not only can be used for supporting the thin-wall workpiece with an irregular inner cavity, but also can play a good role in vibration reduction, realize the vibration reduction of the thin-wall workpiece in the processing process, and improve the quality of a processed surface and the processing efficiency; 2. the tightening component adopts a unit type structure, so that the installation and the disassembly are convenient, and the diversified combination and collocation can be carried out according to the specific use requirements so as to adapt to the clamping of thin-wall workpieces with different size structures, realize the processing of the thin-wall workpieces with different diameter specifications and have strong adaptability; 3. the deformation control of the upper and lower ports of the thin-wall workpiece is realized by clamping the thin-wall workpiece between the positioning substrate and the positioning pressing plate; meanwhile, the pull rod is respectively in threaded connection with the positioning base plate and the positioning pressing plate and is matched with the inner positioning table, the outer positioning table and the positioning pins to limit the movement of the thin-wall workpiece, so that the thin-wall workpiece is completely positioned and clamped, the positioning and clamping quality of the thin-wall workpiece is improved, and the deformation of the thin-wall workpiece caused by the material state, the thermal stress in the machining process and other reasons is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is an exploded view of the present invention;
FIG. 2 is a structural cross-sectional view of the present invention;
FIG. 3 is a top view of the present invention;
FIG. 4 is a view taken along line A-A of FIG. 2;
FIG. 5 is a schematic view of the tightening assembly according to the present invention.
In the figure, 1 is a positioning substrate, 11 is an inner positioning table, 12 is an outer positioning table, 2 is a thin-wall workpiece, 3 is a main pull rod, 4 is a tensioning assembly, 41 is a stretching rod, 42 is a supporting spring, 43 is an assembly base body, 5 is a supporting spring, 6 is a positioning pressing plate, 61 is a through hole, and 7 is a locking nut.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
Embodiment 1, as shown in fig. 1 and 2, the invention provides a large thin-walled workpiece vibration reduction clamping tool, which includes a positioning substrate 1, a thin-walled workpiece 2 is arranged on the positioning substrate 1, and a pressing component is arranged on the upper portion of the thin-walled workpiece 2, that is, the thin-walled workpiece 2 is clamped between the positioning substrate 1 and the pressing component. The inner part of the thin-wall workpiece 2 is axially provided with a main pull rod 3, preferably the main pull rod 3 is arranged along the axis of the thin-wall workpiece 2, and two ends of the main pull rod 3 are respectively fixedly connected with the positioning substrate 1 and the pressing assembly to realize axial positioning of the thin-wall workpiece 2. The main pull rod 3 is provided with a plurality of groups of tightening components 4, the tightening components 4 are matched with the thin-wall workpiece 2, namely the tightening components 4 are used for applying even tightening force to the inside of the thin-wall workpiece 2, the main vibration and self-excited vibration in the process of cutting the thin-wall workpiece are reduced, and the processing surface quality and the processing efficiency of the thin-wall workpiece are improved.
Specifically, the tightening assembly 4 is provided with at least 2 groups and is respectively positioned at the upper part and the lower part of the main pull rod 3, so that uniform tightening force can be provided for the upper end and the lower end of the thin-wall workpiece. In this embodiment, prop tight subassembly be the movable sleeve and establish on main pull rod 3, for preventing to be located a set of supporting component on main pull rod 3 upper portion because self gravity landing downwards and with the gathering of a set of supporting component of main pull rod 3 lower part, cause the inside of thin wall work piece to prop tight power and exert unevenly, consequently, cover on main pull rod 3 and establish supporting spring 5, and supporting spring 5 is located between 2 groups of tight subassemblies 4, can play the effect that supports 2 groups of tight subassemblies well, in order to ensure that the inside atress of thin wall work piece 2 is even. In addition, the number of the set groups of the tightening components 4 can be specifically adjusted according to the size of the thin-wall workpiece, namely when the height of the thin-wall workpiece is low, 2 groups of tightening components can be arranged and respectively located at the upper end and the lower end of the thin-wall workpiece, when the height of the thin-wall workpiece is high, at least 3 groups of tightening components can be arranged and respectively distributed at the upper part, the middle part and the lower part of the thin-wall workpiece, and in the embodiment, the tightening components are provided with 3 groups and respectively located at the upper part, the middle part and the lower part of the thin-wall workpiece, so that axial and uniform supporting force can be provided for.
Preferably, as shown in fig. 5, the tightening assembly 4 is a flexible tightening assembly, which includes a stretching rod 41, a tightening spring 42 and an assembly base 43, the assembly base 43 is sleeved on the main pull rod 3, and the support spring 52 is disposed between the assembly bases 43 of the upper and lower tightening assemblies 4. The stretching rod 41 is perpendicular to the main pull rod 3, an external thread is arranged at the inner end of the stretching rod 41, a threaded hole matched with the stretching rod 41 is formed in the assembly base 43, and the inner end of the stretching rod 41 is in threaded connection with the assembly base 43. The outer end of the stretching rod 41 is matched with the thin-wall workpiece 2, namely, the outer end of the stretching rod 41 is propped against the inner wall of the thin-wall workpiece 2 to support the thin-wall workpiece. In the embodiment, the thin-walled workpiece 2 is cylindrical, and in order to ensure that a radial and uniform tightening force is provided for the inside of the thin-walled workpiece, each group of tightening assemblies 4 includes 3 stretching rods 41, specifically, as shown in fig. 4, the 3 stretching rods 41 are circumferentially and uniformly fixed on an assembly base 43, that is, an included angle between every two adjacent stretching rods is 120 °, so that the radial and uniform stress of the thin-walled workpiece is realized. Furthermore, the stretching rod 41 is of a horizontally placed T-shaped structure, and the outer end of the stretching rod 41 corresponds to the horizontal section of the T shape, so that the contact area between the stretching rod and the thin-wall workpiece is increased, the pressed area of the inner wall of the thin-wall workpiece is increased, and the better supporting effect on the thin-wall workpiece is ensured; meanwhile, in order to prevent the outer end of the stretching rod 41 from scratching the inner wall of the thin-walled workpiece, a plastic material may be adhered to the outer end surface of the stretching rod 41. Furthermore, the stretching rod 41 adopts a three-section type telescopic structure, so that the use requirements of thin-wall workpieces with different sizes can be met. The supporting spring 42 is sleeved on the stretching rod 41, and the original length of the supporting spring 42 is greater than that of the stretching rod 41, so that when two ends of the stretching rod are respectively connected with the assembly base body and the thin-wall workpiece 2, the supporting spring 42 can bear a compression force, and the corresponding supporting spring 42 can also give a rebound force to the assembly base body and the thin-wall workpiece 2, thereby playing a good vibration damping role and reducing main vibration and self-excited vibration of the thin-wall workpiece in the cutting process.
In the embodiment, the contact form (currently, cylindrical surface or line contact is generally adopted) between the tightening component and the thin-wall workpiece is changed to adapt to the profile structures of the clamping parts of different thin-wall workpieces, so that the thin-wall workpiece support device not only can be used for supporting the thin-wall workpiece with an irregular inner cavity, but also can play a good role in vibration reduction. And the tightening component adopts a unit type structure, so that the installation and the disassembly are convenient, and the diversified combination and collocation can be carried out according to specific use requirements so as to adapt to the clamping of thin-wall workpieces with different sizes and structures.
The compression assembly comprises a positioning pressing plate 6 and a locking nut 7, the upper end of the main pull rod 3 is provided with an external thread matched with the locking nut 7, and the main pull rod 3 is in threaded connection with the locking nut 7; the positioning pressing plate 6 is arranged on the upper portion of the thin-wall workpiece 2 and fixed through the locking nut 7, axial positioning of the thin-wall workpiece 2 is achieved, and a gasket can be placed between the positioning pressing plate 6 and the locking nut 7 to guarantee good locking effect of the locking nut 7. The lower extreme of main pull rod 3 is equipped with the external screw thread, is equipped with on the location base plate 1 with main pull rod 3 assorted screw hole, main pull rod 3 and location base plate 1 threaded connection. The structural design realizes that when the locking nut is screwed to move downwards along the axial direction, the positioning pressing plate 6 is pressed tightly, so that axial pressure is generated on the thin-wall workpiece 2, and further, the axial auxiliary positioning and clamping of the thin-wall workpiece are realized, namely, the moving freedom degree of the thin-wall workpiece in the Z-axis direction and the rotating freedom degree of the thin-wall workpiece around the X-axis or the Y-axis are limited. The positioning base plate 1 is provided with an inner positioning table 11 and an outer positioning table 12 which are staggered from inside to outside, the inner positioning table 11 and the outer positioning table 12 are matched with the thin-wall workpiece 2, namely, the lower part of the thin-wall workpiece 2 is clamped between the inner positioning table 11 and the outer positioning table 12, and the moving freedom of the thin-wall workpiece in the X-axis direction and the Y-axis direction is limited. Positioning holes are formed in the inner positioning table 11 and the thin-wall workpiece 2, and the inner positioning table 11 and the thin-wall workpiece 2 are fixed through positioning pins, so that the rotation freedom degree of the thin-wall workpiece 2 in the Z-axis direction is limited. In the embodiment, the deformation control of the upper and lower ports of the thin-wall workpiece is realized by clamping the thin-wall workpiece between the positioning substrate and the positioning pressing plate; meanwhile, the pull rod is respectively in threaded connection with the positioning base plate and the positioning pressing plate and is matched with the inner positioning table, the outer positioning table and the positioning pins to limit the movement of the thin-wall workpiece, so that the thin-wall workpiece is completely positioned and clamped, the positioning and clamping quality of the thin-wall workpiece is improved, and the deformation of the thin-wall workpiece caused by the material state, the thermal stress in the machining process and other reasons is avoided.
When the positioning base plate is used, 4 mounting holes are formed in the positioning base plate, the positioning base plate is mounted on a working table of a machine tool by matching the T-shaped block and the inner hexagonal screw with the mounting holes in the positioning base plate, and the center coordinate of the whole tool is measured and recorded by using the 3D probe; then the main pull rod is installed on the positioning base plate in a threaded connection mode; clamping the thin-wall workpiece between an inner positioning table and an outer positioning table of a positioning substrate, adjusting the circumferential position of the thin-wall workpiece to align a positioning hole on the thin-wall workpiece with a positioning hole on the inner positioning table, and installing a positioning pin for fixing; then installing a plurality of groups of tightening components on the main pull rod in a subsection manner; and finally, installing a positioning pressing plate and realizing locking and fixing by utilizing the threaded connection of a locking nut and the main pull rod.
In embodiment 2, as shown in fig. 3, a through hole 61 is formed in the positioning pressing plate 6, in this embodiment, the through hole 61 is of a fan-shaped structure, and 3 through holes are uniformly formed in the circumferential direction of the central axis of the positioning pressing plate 6. The 3 through holes provided respectively have the following functions: the tool is used for reducing the weight of the whole tool, is beneficial to disassembly, assembly and movement, is convenient for hoisting large thin-wall workpieces, and the like; secondly, the inner cavity is processed by the cutting fluid; thirdly, the use state of the tightening component is convenient to observe, the abnormal phenomenon is prevented from occurring, and the thin-wall workpiece is prevented from being damaged.
The other structure is the same as embodiment 1.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The utility model provides a large-scale thin wall spare damping clamping frock which characterized in that: including location base plate (1), be provided with thin wall work piece (2) on location base plate (1), the upper portion of thin wall work piece (2) is provided with and compresses tightly the subassembly, and the inside axial of thin wall work piece (2) is provided with main pull rod (3), and the both ends of main pull rod (3) respectively with location base plate (1) with compress tightly subassembly fixed connection, and be provided with a plurality of groups on main pull rod (3) and prop tight subassembly (4), prop tight subassembly (4) and cooperate with thin wall work piece (2).
2. The large-scale thin-walled part vibration reduction clamping tool according to claim 1, characterized in that: the tightening component (4) is at least provided with 2 groups and is respectively positioned at the upper part and the lower part of the main pull rod (3); the main pull rod (3) is sleeved with a supporting spring (5), and the supporting spring (5) is positioned between the 2 groups of tightening components (4).
3. The large-scale thin-walled part vibration reduction clamping tool according to claim 2, characterized in that: the tightening component (4) comprises a stretching rod (41), a supporting spring (42) and a component base body (43), the component base body (43) is sleeved on the main pull rod (3), the stretching rod (41) is perpendicular to the main pull rod (3), one end of the stretching rod (41) is fixedly connected with the component base body (43), and the other end of the stretching rod (41) is matched with the thin-wall workpiece (2); the supporting spring (42) is sleeved on the stretching rod (41).
4. The large-scale thin-walled part vibration reduction clamping tool according to claim 3, characterized in that: the stretching rods (41) are of a three-section type telescopic structure, each group of stretching assemblies (4) comprises 3 stretching rods (41), and the 3 stretching rods (41) are circumferentially and uniformly fixed on the assembly base body (43).
5. The large thin-walled part vibration reduction clamping tool according to claim 1 or 4, characterized in that: the compression assembly comprises a positioning pressing plate (6) and a locking nut (7), the upper end of the main pull rod (3) is provided with an external thread matched with the locking nut (7), and the main pull rod (3) is in threaded connection with the locking nut (7); the positioning pressing plate (6) is arranged on the upper portion of the thin-wall workpiece (2) and fixed through a locking nut (7), and a through hole (61) is formed in the positioning pressing plate (6).
6. The large-scale thin-walled part vibration reduction clamping tool according to claim 5, characterized in that: the lower extreme of main pull rod (3) is equipped with the external screw thread, be equipped with on location base plate (1) with main pull rod (3) assorted screw hole, main pull rod (3) and location base plate (1) threaded connection.
7. The large thin-walled part vibration reduction clamping tool according to claim 1, 4 or 6, characterized in that: an inner positioning table (11) and an outer positioning table (12) which are staggered inside and outside are arranged on the positioning substrate (1), and both the inner positioning table (11) and the outer positioning table (12) are matched with the thin-wall workpiece (2); positioning holes are formed in the inner positioning table (11) and the thin-wall workpiece (2), and the inner positioning table (11) and the thin-wall workpiece (2) are fixed through positioning pins.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011341526.8A CN112719969B (en) | 2020-11-25 | 2020-11-25 | Large-scale thin wall spare damping clamping frock |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011341526.8A CN112719969B (en) | 2020-11-25 | 2020-11-25 | Large-scale thin wall spare damping clamping frock |
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| CN112719969A true CN112719969A (en) | 2021-04-30 |
| CN112719969B CN112719969B (en) | 2022-04-05 |
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| CN113618434A (en) * | 2021-10-11 | 2021-11-09 | 沈阳马卡智工科技有限公司 | Clamping tool device and clamping method for thin-wall part machining |
| CN115351512A (en) * | 2022-09-05 | 2022-11-18 | 山东省章丘鼓风机股份有限公司 | Machining method for conical arc-shaped air inlet of ventilator |
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|---|---|
| CN112719969B (en) | 2022-04-05 |
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