CN110877209A - Low-stress clamping tool and method for precision sheet parts - Google Patents
Low-stress clamping tool and method for precision sheet parts Download PDFInfo
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- CN110877209A CN110877209A CN201910997165.3A CN201910997165A CN110877209A CN 110877209 A CN110877209 A CN 110877209A CN 201910997165 A CN201910997165 A CN 201910997165A CN 110877209 A CN110877209 A CN 110877209A
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- clamping
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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
- B23Q3/065—Work-clamping means adapted for holding workpieces having a special form or being made from a special material for holding workpieces being specially deformable, e.g. made from thin-walled or elastic material
Abstract
The invention provides a low-stress clamping tool and a low-stress clamping method for precision titanium alloy sheet parts, wherein the clamping tool consists of a left part and a right part, and a main body of each part is provided with a bevel edge for clamping and a clamping groove for clamping the parts; the clamping groove is provided with a lateral opening, and the plane shape of the clamping groove is triangular; an included angle between two actually existing edges of the clamping groove is equal to a certain included angle of the thin plate type part to be processed; the bevel edge for clamping is arranged on the side surface of the main body; when the sheet part to be processed is positioned in the clamping groove of the tool, the bevel edge for clamping is parallel to the diagonal line of the sheet part to be processed. According to the invention, by designing the low-stress clamping tool, the direction parallel to the diagonal direction of the parallelogram clamping surface of the sheet part to be processed is taken as the clamping direction of the jaw of the vice, so that the clamping stress of the part can be reduced, the clamping reliability of the part can be ensured, the clamping stress is uniformly distributed, the stress concentration is reduced, and the processing precision of the sheet part is ensured.
Description
Technical Field
The invention relates to the field of aviation manufacturing, in particular to a low-stress clamping tool and a low-stress clamping method for precision thin plate parts.
Background
In an aviation head-up display system, a thin plate part provides a positioning and mounting reference for an optical subassembly in the aviation head-up display system, so that the form and position tolerance precision of the part is high. The parts are mostly thin plates with the thickness of about 5mm, the materials are mostly titanium alloys difficult to process, X, Y, Z three-direction processing is carried out on the parts during processing, due to the fact that the thickness is small, the materials are difficult to process, cutter back-off phenomenon is easily generated due to cutting action in the traditional processing process, the phenomenon of upper thickness, lower thickness and size super-difference is caused, and deformation is obvious after processing.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a low-stress clamping tool and a low-stress clamping method for a precision titanium alloy sheet part.
The technical scheme of the invention is as follows:
the low-stress clamping tool for the precision sheet parts is characterized in that: the thin plate type part is a thin plate type part with a parallelogram clamping surface;
the tool consists of a left part and a right part, wherein the main bodies of the two parts are completely the same and the whole tool is blocky; the main body of each part is provided with a bevel edge for clamping and a clamping groove for clamping a part;
the clamping groove is positioned on the front surface of the main body and is provided with a lateral opening and a triangular plane shape; an included angle between two actually existing edges of the clamping groove is equal to a certain included angle in a parallelogram clamping surface of the sheet part to be processed;
the bevel edge for clamping is positioned on the side surface of the main body; when the thin plate part to be processed is positioned in the clamping groove of the tool, the bevel edge for clamping is parallel to a diagonal line of the thin plate part to be processed, which is opposite to the included angle of two sides of the clamping groove.
Further preferred scheme, a low stress clamping frock of accurate sheet metal class part, its characterized in that: and a abdicating groove is formed at the vertex of the included angle of the clamping groove.
Further preferred scheme, a low stress clamping frock of accurate sheet metal class part, its characterized in that: parallelogram clamp for clamping two side lengths of groove and thin plate part to be processedThe lengths of two adjacent edges in the holding surface are in the same proportion, and the proportionality coefficient is less than 1: l isGi＝a×LPiWherein i is the serial number of the edge of the clamping groove, i is 1 or 2, and LGiFor clamping the side length of the groove, LPiThe length of the corresponding side in the parallelogram clamping surface of the sheet part to be processed is a proportionality coefficient.
Further preferred scheme, a low stress clamping frock of accurate sheet metal class part, its characterized in that: a is more than 0.8 and less than 0.98.
Further preferred scheme, a low stress clamping frock of accurate sheet metal class part, its characterized in that: clamping groove depth D: d is more than 0.5D and less than 1.5D, wherein D is the thickness of the edge of the parallelogram clamping surface of the sheet part to be processed.
Further preferred scheme, a low stress clamping frock of accurate sheet metal class part, its characterized in that: the bottom surface and the side wall of the clamping groove have the requirements of flatness, verticality, parallelism and surface roughness higher than the precision requirement of the sheet part to be processed.
The method for realizing low-stress clamping of the precision sheet part by using the tool is characterized by comprising the following steps of: the method comprises the following steps:
step 1: the clamping tool is arranged in a vice, and clamping grooves of the left part and the right part of the clamping tool are oppositely arranged;
step 2: placing two opposite angles of a parallelogram clamping surface of a sheet part to be processed in clamping grooves of a left part and a right part of a clamping tool respectively;
and step 3: and adjusting the jaw of the vice, slowly clamping the vice, and pressing the upper surface of the part to enable the lower surface of the part to be tightly attached to the clamping groove until the part reaches a clamping state.
Advantageous effects
According to the invention, by designing the low-stress clamping tool, the direction parallel to the diagonal direction of the parallelogram clamping surface of the sheet part to be processed is taken as the clamping direction of the jaw of the vice, so that the clamping stress of the part can be reduced, the clamping reliability of the part can be ensured, the clamping stress is uniformly distributed, the stress concentration is reduced, and the processing precision of the sheet part is ensured.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1: a two-dimensional schematic view of a part;
FIG. 2 is a drawing: a three-dimensional schematic diagram of the front surface of the part;
FIG. 3: a three-dimensional schematic diagram of the reverse side of the part;
FIG. 4 is a drawing: a schematic diagram of the left half part of the low-stress clamping tool;
FIG. 5: a right half schematic view of the low-stress clamping tool;
FIG. 6: a low-stress clamping tool combination schematic diagram;
FIG. 7: a schematic diagram of a fixture clamping part;
FIG. 8: a tool stress schematic diagram;
FIG. 9: the part is a stress decomposition schematic diagram;
FIG. 10: the part is uniformly stressed.
Detailed Description
The following detailed description of embodiments of the invention is intended to be illustrative, and not to be construed as limiting the invention.
According to the external dimension of the precision titanium alloy sheet part, see the attached drawings I-III: the two-dimensional and three-dimensional schematic diagram of the part is that the sheet part is a sheet part with a parallelogram clamping surface; designing a low-stress clamping tool, wherein the tool consists of a left part and a right part, the main bodies of the two parts are completely the same, and the whole part is blocky, and is shown in the attached drawings of four parts to six parts: the main body of each part is provided with a bevel edge for clamping and a clamping groove for clamping a part.
The clamping groove is positioned on the front surface of the main body and is provided with a lateral opening and a triangular plane shape; the included angle between two actually existing edges of the clamping groove is equal to a certain included angle in the parallelogram clamping surface of the sheet part to be processed. The included angle vertex of the clamping groove is provided with a abdicating groove which can be cylindrical, rectangular or square.
The length of two edges of the clamping groove is in the same proportion with the length of two adjacent edges in a parallelogram clamping surface of the sheet part to be processed, and the proportionality coefficient is less than 1: l isGi＝a×LPiWherein i is the serial number of the edge of the clamping groove, i is 1 or 2, and LGiFor clamping the side length of the groove, LPiThe corresponding side length in the parallelogram clamping surface of the sheet part to be processed is represented by a proportionality coefficient, wherein a is more than 0.8 and less than 0.98. Clamping groove depth D: d is more than 0.5D and less than 1.5D, wherein D is the thickness of the edge of the parallelogram clamping surface of the sheet part to be processed. The bottom surface and the side wall of the clamping groove have the requirements of flatness, verticality, parallelism and surface roughness higher than the precision requirement of the sheet part to be processed.
The bevel edge for clamping is positioned on the side surface of the main body; when the thin plate part to be processed is positioned in the clamping groove of the tool, the bevel edge for clamping is parallel to a diagonal line of the thin plate part to be processed, which is opposite to the included angle of two sides of the clamping groove.
The method for realizing low-stress clamping of the precision sheet part by using the tool comprises the following steps:
step 1: selecting a vice with a proper jaw, opening the jaw to the maximum, installing a clamping tool into the vice, and oppositely placing clamping grooves of the left part and the right part of the clamping tool;
step 2: placing two opposite angles of a parallelogram clamping surface of a sheet part to be processed in clamping grooves of a left part and a right part of a clamping tool respectively;
and step 3: and adjusting the jaw of the vice, slowly clamping the vice, and pressing the upper surface of the part to enable the lower surface of the part to be tightly attached to the clamping groove until the part reaches a clamping state.
Then, the cutting processing such as milling, drilling and the like of the parts can be carried out.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.
Claims (7)
1. The utility model provides a low stress clamping frock of accurate sheet metal class part which characterized in that: the thin plate type part is a thin plate type part with a parallelogram clamping surface;
the tool consists of a left part and a right part, wherein the main bodies of the two parts are completely the same and the whole tool is blocky; the main body of each part is provided with a bevel edge for clamping and a clamping groove for clamping a part;
the clamping groove is positioned on the front surface of the main body and is provided with a lateral opening and a triangular plane shape; an included angle between two actually existing edges of the clamping groove is equal to a certain included angle in a parallelogram clamping surface of the sheet part to be processed;
the bevel edge for clamping is positioned on the side surface of the main body; when the thin plate part to be processed is positioned in the clamping groove of the tool, the bevel edge for clamping is parallel to a diagonal line of the thin plate part to be processed, which is opposite to the included angle of two sides of the clamping groove.
2. The low-stress clamping tool for the precision sheet parts as claimed in claim 1, wherein the tool comprises: and a abdicating groove is formed at the vertex of the included angle of the clamping groove.
3. The low-stress clamping tool for the precision sheet parts as claimed in claim 1, wherein the tool comprises: the length of two edges of the clamping groove is in the same proportion with the length of two adjacent edges in a parallelogram clamping surface of the sheet part to be processed, and the proportionality coefficient is less than 1: l isGi＝a×LPiWherein i is the serial number of the edge of the clamping groove, i is 1 or 2, and LGiFor clamping the side length of the groove, LPiThe length of the corresponding side in the parallelogram clamping surface of the sheet part to be processed is a proportionality coefficient.
4. The low-stress clamping tool for the precision sheet parts as claimed in claim 2, wherein the tool comprises: a is more than 0.8 and less than 0.98.
5. The low-stress clamping tool for the precision sheet parts as claimed in claim 1, wherein the tool comprises: clamping groove depth D: d is more than 0.5D and less than 1.5D, wherein D is the thickness of the edge of the parallelogram clamping surface of the sheet part to be processed.
6. The low-stress clamping tool for the precision sheet parts as claimed in claim 1, wherein the tool comprises: the bottom surface and the side wall of the clamping groove have the requirements of flatness, verticality, parallelism and surface roughness higher than the precision requirement of the sheet part to be processed.
7. The method for realizing low-stress clamping of the precision sheet part by using the tool of claim 1 is characterized by comprising the following steps of: the method comprises the following steps:
step 1: the clamping tool is arranged in a vice, and clamping grooves of the left part and the right part of the clamping tool are oppositely arranged;
step 2: placing two opposite angles of a parallelogram clamping surface of a sheet part to be processed in clamping grooves of a left part and a right part of a clamping tool respectively;
and step 3: and adjusting the jaw of the vice, slowly clamping the vice, and pressing the upper surface of the part to enable the lower surface of the part to be tightly attached to the clamping groove until the part reaches a clamping state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910997165.3A CN110877209A (en) | 2019-10-20 | 2019-10-20 | Low-stress clamping tool and method for precision sheet parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910997165.3A CN110877209A (en) | 2019-10-20 | 2019-10-20 | Low-stress clamping tool and method for precision sheet parts |
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| Publication Number | Publication Date |
|---|---|
| CN110877209A true CN110877209A (en) | 2020-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910997165.3A Pending CN110877209A (en) | 2019-10-20 | 2019-10-20 | Low-stress clamping tool and method for precision sheet parts |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2957158B1 (en) * | 1998-04-07 | 1999-10-04 | 株式会社浅井鉄工所 | Small deformed object gripping device |
| CN203357289U (en) * | 2013-07-05 | 2013-12-25 | 许大农 | Combined clamping forceps mouth suitable for precision special-shaped part |
| CN203611625U (en) * | 2013-12-16 | 2014-05-28 | 东莞市宝华数控科技有限公司 | Workpiece alignment device for fine engraving machine |
| CN204075822U (en) * | 2014-09-04 | 2015-01-07 | 四川工程职业技术学院 | Sheet workpiece plane machining clamping device |
| CN205834767U (en) * | 2016-08-08 | 2016-12-28 | 成都四威高科技产业园有限公司 | A kind of vice clamping number milling sheet part tooling |
| CN206393255U (en) * | 2016-12-22 | 2017-08-11 | 卢远东 | A kind of processing unit (plant) for base plate of radiator |
-
2019
- 2019-10-20 CN CN201910997165.3A patent/CN110877209A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2957158B1 (en) * | 1998-04-07 | 1999-10-04 | 株式会社浅井鉄工所 | Small deformed object gripping device |
| CN203357289U (en) * | 2013-07-05 | 2013-12-25 | 许大农 | Combined clamping forceps mouth suitable for precision special-shaped part |
| CN203611625U (en) * | 2013-12-16 | 2014-05-28 | 东莞市宝华数控科技有限公司 | Workpiece alignment device for fine engraving machine |
| CN204075822U (en) * | 2014-09-04 | 2015-01-07 | 四川工程职业技术学院 | Sheet workpiece plane machining clamping device |
| CN205834767U (en) * | 2016-08-08 | 2016-12-28 | 成都四威高科技产业园有限公司 | A kind of vice clamping number milling sheet part tooling |
| CN206393255U (en) * | 2016-12-22 | 2017-08-11 | 卢远东 | A kind of processing unit (plant) for base plate of radiator |
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Application publication date: 20200313 |