CN113182894B - Clamping method for double-sided processing of pipe clamping layer structure of array composite material - Google Patents
Clamping method for double-sided processing of pipe clamping layer structure of array composite material Download PDFInfo
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- CN113182894B CN113182894B CN202110362500.XA CN202110362500A CN113182894B CN 113182894 B CN113182894 B CN 113182894B CN 202110362500 A CN202110362500 A CN 202110362500A CN 113182894 B CN113182894 B CN 113182894B
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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
- B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
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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
- B23Q7/00—Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting
- B23Q7/02—Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting by means of drums or rotating tables or discs
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Abstract
The invention provides a clamping method for double-sided processing of an array composite pipe clamp layer structure. The invention comprises the following steps: fixing a first positioning plug into a central groove of the tooling clamp of the array composite pipe clamp layer structure; sleeving a central unit of the workpiece on a first positioning plug; sleeving the workpiece in the waist-shaped groove of the clamp by using a second positioning plug; selecting other part units of the workpiece and peripheral units of the workpiece for positioning and clamping; and processing the second surface of the workpiece, wherein the position of each positioning plug is the position of the first surface during processing. The clamping method does not generate horizontal force on the workpieces of the clamp layer structure of the array composite pipe, and does not damage the weak rigid structure of the workpieces of the clamp layer structure of the array composite pipe; the clamping device can clamp a workpiece with a plane bottom and can clamp a workpiece with a curved bottom according to the surface shape; the clamping method is simple in manufacture, convenient to use, high in machining efficiency and beneficial to achieving high machining precision.
Description
Technical Field
The invention relates to the technical field of mechanical precision/ultra-precision machining, in particular to a clamping method for double-side machining of an array composite pipe clamp layer structure.
Background
The sandwich structure of the array composite pipe belongs to a structure which is weak in rigidity and difficult to process, and is widely applied to manufacturing of industrial products such as aviation, aerospace, satellites and automobiles due to the characteristics of excellent impact resistance, vibration reduction, high specific strength, high specific stiffness and the like. The array composite pipe clamp layer structure workpiece can realize a weight reduction effect while playing a supporting role, the requirements on surface shape precision and surface roughness are high, the surface shape precision and the surface roughness of the prepared and molded array composite pipe clamp layer structure workpiece are poor, and the array composite pipe clamp layer structure workpiece cannot be directly used, so that the double surfaces of the array composite pipe clamp layer structure workpiece need to be processed to meet the use requirements of an upper surface and a lower surface.
However, the array composite pipe clamp layer structure unit is difficult to position in the double-sided machining process, and is easy to receive clamping stress in the positioning and clamping process, so that workpiece deformation is caused to influence machining precision, the positioning reference is guaranteed in the clamping process, and the workpiece structure is protected, so that the positioning and clamping difficulty is high. The existing clamping method for the clamping layer structure of the array composite pipe has certain disadvantages: firstly, the clamping process of the clamp is adjusted through the feedback of the stress deformation of the workpiece in the clamping process, and the clamping stress is generated on the workpiece in the adjusting process; secondly, multiple times of clamping are needed in the process of positioning and clamping the periodic structure, so that the manual influence is large, the positioning and clamping error is increased, and the accurate transmission of the reference is difficult to ensure; finally, the clamping method is only suitable for a specific certain array composite pipe clamp layer structure, and the universality is poor. In order to solve the defects, the invention provides a double-side processing and clamping method of an array composite pipe clamp layer structure, which has no clamping stress and uniform standard in double-side processing and is suitable for various unit shapes.
Disclosure of Invention
According to the technical problems, the clamping method for double-side processing of the array composite pipe clamp layer structure is provided, so that the requirement that double-side processing is difficult to position and clamp in the field of mechanical precision/ultra-precision processing of the array composite pipe clamp layer structure is met. The technical means adopted by the invention are as follows:
a clamping method for double-sided processing of an array composite pipe clamp layer structure comprises the following steps:
processing a first surface: s1, fastening the first surface tool clamp of the sandwich structure of the array composite pipe to a machine tool operating table through bolts;
s2, fixing the first positioning plug into a central groove of a first surface tool clamp of the array composite pipe clamp layer structure;
s3, sleeving the central unit of the sandwich structure workpiece of the array composite pipe on a first positioning plug in a central groove of a tool clamp on the first surface of the sandwich structure of the array composite pipe;
s4, selecting an array composite pipe clamp layer structure unit above the waist-shaped groove at the top of the array composite pipe clamp layer structure workpiece, sleeving the selected array composite pipe clamp layer structure unit from the top by using a second positioning plug, and rotating the workpiece left and right around the center of the workpiece to enable the second positioning plug to be just embedded into the waist-shaped groove;
s5, selecting other weak rigid units of the array composite pipe clamp layer structure workpiece and peripheral units of the workpiece according to the workpiece clamping requirement to sleeve the auxiliary positioning plug, and fastening the auxiliary positioning plug and the clamp by using a screw;
processing a second surface: s6, fastening the second surface tool clamp of the sandwich structure of the array composite pipe to a machine tool operating table through bolts;
s7, fixing the first positioning plug into a central groove of a tooling clamp on the second surface of the array composite pipe clamp layer structure;
s8, sleeving the central unit in the step S3 on a first positioning plug in a central groove of a tool clamp on a second surface of the sandwich structure of the array composite pipe;
s9, sleeving the second positioning plug into the unit selected in the step S4 from the top, and rotating the workpiece around the center of the workpiece left and right to enable the second positioning plug to be just embedded into the waist-shaped groove;
s10, selecting other weak rigid units of the array composite pipe clamp layer structure workpiece and peripheral units of the workpiece according to the workpiece clamping requirement to sleeve the auxiliary positioning plug, and fastening the auxiliary positioning plug and the clamp by using a screw;
further, the surface of the fixture of the array composite pipe clamp layer structure is the same as the bottom surface shape of the workpiece to be processed, and the threaded through hole in the fixture is a counter bore.
Furthermore, the first positioning plug, the second positioning plug and the auxiliary positioning plug are the same as the array composite pipe clamp layer structure unit in size, a screw hole in the vertical direction is formed in the center, and the length is the remaining minimum height of the actually processed array composite pipe clamp layer structure workpiece.
Furthermore, the position of the central groove is the center of the fixture, the specification of the central groove is the same as that of the first positioning plug, and the groove depth of the central groove is one fourth to one third of the height of the first positioning plug.
Furthermore, the central line of the waist-shaped groove is superposed with the central line of the central groove, the width of the waist-shaped groove is the same as the size of the second positioning plug, the length of the waist-shaped groove is the size of the inner wall of the sandwich structure workpiece unit of the double-array composite pipe, and the distance between the central groove and the waist-shaped groove is one third to one fourth of the length of the workpiece.
Further, the central cell selected in step S8 is the same as the cell selected in step S3, and the cells of the tube-clamp layer structure of the array composite material selected in step S9 are the same as the cells selected in step S4.
Compared with the prior art, the invention has the following advantages:
the clamping method does not generate a force in the horizontal direction on the workpiece in the clamping layer structure of the array composite pipe, and does not generate internal stress on the workpiece in the clamping layer structure of the array composite pipe so as to damage the weak rigid structure of the workpiece in the clamping layer structure of the array composite pipe; the clamping device can clamp a workpiece with a plane bottom, can clamp a workpiece with a curved bottom according to the surface shape requirement, and avoids deformation of the workpiece with the array composite pipe clamp layer structure or falling off of the array composite pipe clamp layer structure unit in the clamping process; the clamping method is simple in manufacture, convenient to use, high in machining efficiency and beneficial to achieving high machining precision.
The clamping method adopted by the clamping method for the sandwich structure of the array composite pipe is suitable for the clamp layer structure of the array composite pipe with any shape, and has universality.
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 embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of double-sided processing and clamping of the pipe clamp layer structure of the array composite material of the invention.
Fig. 2 is a schematic top view of a double-sided processing fixture for an array composite pipe sandwich structure.
Fig. 3 is a schematic front view of a double-sided processing fixture for an array composite pipe sandwich structure.
FIG. 4 is a schematic view of a sandwich structure of the array composite tube.
FIG. 5 is a schematic view of clamping of a sandwich structure of an array composite pipe by machining a first surface on both sides.
FIG. 6 is a schematic view of clamping the sandwich structure of the array composite tube by machining the second surface of the sandwich structure.
In the figure: 1. the device comprises a central groove, 2 a waist-shaped groove, 3 a first positioning plug, 4 an array composite pipe clamp layer structure tooling fixture, 5 a counter bore, 6 an array composite pipe sandwich structure workpiece, 7 a second positioning plug and 8 an auxiliary positioning plug.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the embodiment discloses a clamping method for double-sided processing of an array composite pipe clamp layer structure, which includes the following steps:
processing a first surface: s1, fastening the first surface tool clamp of the sandwich structure of the array composite pipe to a machine tool operating table through bolts; the first surface tool clamp of the array composite pipe sandwich structure is shown in figures 2 and 3, a central groove 1 and a waist-shaped groove 2 are arranged in the array composite pipe sandwich structure tool clamp 4, the clamp 4 is connected with a machine tool through a bolt, the surface of the clamp 4 is the same as the bottom surface shape of a machined workpiece, and a threaded through hole in the clamp 4 is a counter bore 5 so as to avoid the phenomenon that the height of the bolt is too high to interfere with the installation and machining path of the workpiece.
S2, fixing the first positioning plug 3 into the central groove 1 of the first surface tool clamp of the array composite pipe sandwich structure;
s3, sleeving the central unit of the array composite pipe clamp layer structure workpiece 6 shown in the figure 4 on the first positioning plug 3 in the central groove 1 of the array composite pipe clamp layer structure first surface tool clamp;
s4, selecting an array composite pipe clamp layer structure unit above the waist-shaped groove 2 from the top of the array composite pipe clamp layer structure workpiece, sleeving the selected array composite pipe clamp layer structure unit into the second positioning plug 7 from the top, and rotating the workpiece around the center of the workpiece left and right to enable the second positioning plug 7 to be just embedded into the waist-shaped groove 2;
s5, as shown in fig. 5, selecting other weak rigid units and peripheral units of the workpiece in the pipe clamp layer structure of the array composite material to sleeve the auxiliary positioning plug 8, and fastening the auxiliary positioning plug 8 to the fixture by using a screw, in this embodiment, a wood fixture can be selected so that the screw can easily enter the wood fixture, and the fastening of the auxiliary positioning plug and the fixture is ensured;
as shown in fig. 6, the second surface processing: s6, fastening the second surface tool clamp of the sandwich structure of the array composite pipe to a machine tool operating table through bolts;
s7, fixing the first positioning plug 3 into the central groove 1 of the tooling clamp for the second surface of the array composite pipe sandwich structure;
s8, sleeving the central unit in the step S3 on the first positioning plug 3 in the central groove 1 of the tooling clamp on the second surface of the sandwich structure of the array composite pipe;
s9, sleeving the second positioning plug 7 into the unit selected in the step S4 from the top, and rotating the workpiece around the center of the workpiece left and right to enable the second positioning plug 7 to be just embedded into the waist-shaped groove 2;
s10, selecting other weak rigidity units and peripheral units of the array composite pipe clamp layer structure workpiece according to the workpiece clamping requirement to sleeve the auxiliary positioning plug 8, and fastening the auxiliary positioning plug 8 and a clamp by using a screw;
the first positioning plug 3, the second positioning plug 7 and the auxiliary positioning plug 8 are the same as the array composite pipe clamp layer structure unit in size, the center of the first positioning plug 3 is provided with a screw hole in the vertical direction, so that a workpiece is fastened with the clamp 4 through the screw by means of the first positioning plug 3, the second positioning plug 7 and the auxiliary positioning plug 8, the length is the minimum remaining height of the actually processed array composite pipe clamp layer structure workpiece, the workpiece is attached to the array composite pipe clamp layer structure unit in the clamping process, and clamping stress is prevented from being generated, so that the workpiece is protected. In the process of positioning and clamping, the first positioning plugs 3 with the same size as the array composite pipe clamp layer structure units are sleeved in the array composite pipe clamp layer structure units, so that no clamping stress exists between the first positioning plugs 3 and the array composite pipe clamp layer structure units.
The position of the central groove 1 is the center of the clamp, the specification of the central groove 1 is the same as that of the first positioning plug 3, and the groove depth of the central groove 1 is one fourth to one third of the height of the first positioning plug 3.
And in the step S3, the central unit of the array composite pipe clamp layer structure workpiece 6 is sleeved on the first positioning plug 3 in the central groove 1 of the array composite pipe sandwich structure tool clamp 4 to complete the determination of the central position of the array composite pipe clamp layer structure workpiece 6. The central line of the waist-shaped groove 2 is coincided with the central line of the central groove 1, the width of the waist-shaped groove 2 is the same as the size of the second positioning plug 7, the length of the waist-shaped groove 2 is twice the size of the inner wall of the sandwich structure workpiece unit of the array composite pipe, and the distance between the central groove 1 and the waist-shaped groove 2 is one quarter to one third of the length of the workpiece.
The workpiece 6 of the pipe clamp layer structure of the array composite material is a discontinuous entity, and the position of the selected unit is difficult to be accurately positioned in the actual positioning process, so that the waist-shaped groove 2 with the length being twice as long as the unit can ensure that the position of the selected unit can embed the second positioning plug 7 into the waist-shaped groove 2. The datum of the array composite pipe clamp layer structure workpiece 6 can be determined through two-point positioning of the central groove 1 and the waist-shaped groove 2, and two positioning units selected during processing of the second surface are the same as those of the first surface, so that accurate transmission of double-surface processing datum can be guaranteed.
And (4) sleeving the auxiliary positioning plug 8 into other weak-rigidity units of the array composite pipe clamp layer structure workpiece 6 selected in the step S5 according to the stress condition in the actual processing process, and fastening the workpiece and the clamp 4 by the aid of the auxiliary positioning plug 8 through screws so as to clamp the workpiece. In the positioning and clamping process, the auxiliary positioning plug 8 and the clamp 5 are fastened through screws, no clamping stress is generated between the auxiliary positioning plug 8 and the array composite pipe clamp layer structure workpiece 6, and the clamping error is reduced.
And during the second surface processing, according to the surface shape of the surface of the processed and formed workpiece, using a tool clamp 4 with a surface which is attached to the surface of the processed and formed workpiece to support the workpiece, and repeating the steps S1-S5 to realize reverse clamping of the workpiece, wherein the array composite pipe clamp layer structure unit selected in the step S6 is the same as the unit selected in the step S4 so as to ensure accurate transmission of the positioning reference.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. A clamping method for double-sided processing of an array composite pipe clamp layer structure is characterized by comprising the following steps:
processing a first surface: s1, fastening the first surface tool clamp of the sandwich structure of the array composite pipe to a machine tool operating table through bolts;
s2, fixing the first positioning plug into a central groove of a first surface tool clamp of the array composite pipe clamp layer structure;
s3, sleeving the central unit of the sandwich structure workpiece of the array composite pipe on a first positioning plug in a central groove of a tool clamp on the first surface of the sandwich structure of the array composite pipe;
s4, selecting an array composite pipe clamp layer structure unit above the waist-shaped groove at the top of the array composite pipe clamp layer structure workpiece, sleeving the selected array composite pipe clamp layer structure unit from the top by using a second positioning plug, and rotating the workpiece left and right around the center of the workpiece to enable the second positioning plug to be just embedded into the waist-shaped groove;
s5, selecting other weak rigid units of the array composite pipe clamp layer structure workpiece and peripheral units of the workpiece according to the workpiece clamping requirement to sleeve the auxiliary positioning plug, and fastening the auxiliary positioning plug and the clamp by using a screw;
processing a second surface: s6, fastening the second surface tool clamp of the sandwich structure of the array composite pipe to a machine tool operating table through bolts;
s7, fixing the first positioning plug into a central groove of a tooling clamp on the second surface of the array composite pipe clamp layer structure;
s8, sleeving the central unit in the step S3 on a first positioning plug in a central groove of a tool clamp on a second surface of the sandwich structure of the array composite pipe;
s9, sleeving the second positioning plug into the unit selected in the step S4 from the top, and rotating the workpiece around the center of the workpiece left and right to enable the second positioning plug to be just embedded into the waist-shaped groove;
s10, selecting other weak rigidity units and peripheral units of the array composite pipe clamp layer structure workpiece according to the workpiece clamping requirement to sleeve the auxiliary positioning plug, and fastening the auxiliary positioning plug and the clamp by using a screw.
2. The clamping method for double-sided processing of the pipe clamp layer structure of the array composite material according to claim 1, wherein the surface of a tool clamp of the pipe clamp layer structure of the array composite material is the same as the bottom surface of a workpiece to be processed, and the threaded through hole on the clamp is a counter bore.
3. The clamping method for double-sided processing of the array composite pipe clamp layer structure according to claim 1, wherein the first positioning plug, the second positioning plug and the auxiliary positioning plug are the same as the array composite pipe clamp layer structure unit in size, a screw hole is formed in the center of each of the first positioning plug, the second positioning plug and the auxiliary positioning plug in a vertical direction, and the length of each of the first positioning plug, the second positioning plug and the auxiliary positioning plug is the minimum height of a workpiece of the array composite pipe clamp layer structure after actual processing.
4. The clamping method for double-sided processing of the pipe clamp layer structure of the array composite material according to claim 1, wherein the position of the central groove is the center of the clamp, the specification of the central groove is the same as that of the first positioning plug, and the groove depth of the central groove is one quarter to one third of the height of the first positioning plug.
5. The clamping method for double-sided processing of the sandwich structure of the array composite pipe as claimed in claim 1, wherein the center line of the waist-shaped groove coincides with the center line of the central groove, the width of the waist-shaped groove is the same as the size of the second positioning plug, the length of the waist-shaped groove is twice the size of the inner wall of the sandwich structure workpiece unit of the array composite pipe, and the distance between the central groove and the waist-shaped groove is one quarter to one third of the workpiece length.
6. The method of claim 1, wherein the central unit selected in step S8 is the same as the unit selected in step S3, and the unit selected in step S9 is the same as the unit selected in step S4.
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| CN202110362500.XA CN113182894B (en) | 2021-04-02 | 2021-04-02 | Clamping method for double-sided processing of pipe clamping layer structure of array composite material |
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| CN115815647A (en) * | 2022-11-09 | 2023-03-21 | 大连理工大学 | Array composite pipe clamping method and device adopting internal expansion unit |
| CN115609035B (en) * | 2022-11-09 | 2024-06-18 | 大连理工大学 | Axial-posture-adaptive array composite pipe clamping device and method |
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| CN113182894A (en) | 2021-07-30 |
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