CN112917094A - Method for improving precision of sheet metal part - Google Patents
Method for improving precision of sheet metal part Download PDFInfo
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- CN112917094A CN112917094A CN201911243406.1A CN201911243406A CN112917094A CN 112917094 A CN112917094 A CN 112917094A CN 201911243406 A CN201911243406 A CN 201911243406A CN 112917094 A CN112917094 A CN 112917094A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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Abstract
The invention discloses a method for improving the precision of a sheet metal part, which comprises the following steps: selecting materials: selecting a board with uniform texture, and knowing related information about the board so as to select a stable process parameter for processing; drawing: unfolding a structural part to be processed into a flat plate piece, and drawing a graph according to the unfolded flat plate piece; blanking: when NC blanking is carried out, firstly, a numerical control machining program is compiled, namely, a drawn development figure is compiled into a program which can be recognized by an NC numerical control machining machine tool by using programming software; the method for improving the precision of the sheet metal part has the advantages of being high in precision of the part, simple in process, good in universality, capable of improving the appearance quality of the product, reducing the production cost and lightening the weight of the product.
Description
Technical Field
The invention relates to the technical field of sheet metal machining, in particular to a method for improving the precision of a sheet metal part.
Background
The sheet metal processing is a pivotal technology which needs to be mastered by a sheet metal technical staff, and is also an important process for sheet metal product forming, the sheet metal processing comprises the traditional methods and process parameters of cutting blanking, blanking processing, bending and pressing forming and the like, and also comprises various cold stamping die structures and process parameters, various equipment working principles and operation methods, and also comprises a new stamping technology and a new process, and the processing of a part sheet metal is called sheet metal processing.
Along with the development of sheet metal numerical control equipment, a large number of sheet metal structural forms formed by sheet metal stamping processing are adopted for cabinets, control consoles and the like, the bending precision of the sheet metal structural forms has direct influence on the use, the performance and the like of the whole product, in order to meet different design requirements, sheet metal parts are often bent into various shapes, the bending processing is widely applied to the sheet metal processing, is also the most common, the bending precision of sheet metal products is improved, and the sheet metal structural forms have an important effect on ensuring the product quality.
Disclosure of Invention
The invention aims to provide a method for improving the precision of a sheet metal part, which has the advantage of high precision of the part and solves the problem that the precision is reduced due to the resilience and deformation of the sheet metal part in the bending process of the conventional sheet metal product.
In order to achieve the purpose, the invention provides the following technical scheme: a method for improving the precision of a sheet metal part comprises the following steps:
step 1: selecting materials: selecting a board with uniform texture, and knowing related information about the board so as to select a stable process parameter for processing;
step 2: drawing: unfolding a structural part to be processed into a flat plate piece, and drawing a graph according to the unfolded flat plate piece;
and step 3: blanking: when NC blanking is carried out, firstly, a numerical control machining program is compiled, namely, a drawn expansion diagram is compiled into a program which can be recognized by an NC numerical control machining machine tool by using programming software, and the program is arranged on an iron plate step by step according to the programs to punch the structural shape of the flat plate;
and 4, step 4: and (4) riveting: the riveting piece is subjected to riveting operation through a punch press or a hydraulic riveting press, and is riveted on the sheet metal part;
and 5: bending: the method comprises the following steps of folding a 2D flat plate into a 3D part, wherein the machining of the 3D part needs a folding bed and a corresponding bending die to complete operation, and according to a certain bending sequence, the principle is that the next knife is firstly folded without interference and then is folded with interference;
step 6: anti-rebound: the pressure in the bending process is properly increased, the loading time is prolonged, and for workpieces with higher requirements on processing precision, the edge part of the whole plate can be removed during blanking, and reinforcing ribs are pressed in a bending area if possible to improve the rigidity of the part and inhibit resilience;
and 7: welding: welding a plurality of parts together to achieve the purpose of processing or welding the edge seams of single parts;
and 8: assembling: a plurality of parts or assemblies are assembled together according to a certain mode to form a complete sheet metal part.
Preferably, in step 1, the detailed conditions of the plate manufacturer, such as a production license, a quality certificate, a main product detection report, etc., should be known in detail, and then various data of the manufacturer are comprehensively analyzed to determine whether the requirements of production can be met.
Preferably, in step 2, the fabrication holes, grooves and notches are preprocessed, so as to prevent cracks from being generated due to uneven stress of the material during bending, the fabrication holes are generally required to be pre-grooved or punched, the groove width K is usually not less than t, the groove depth L is not less than t + r + K/2, and in order to prevent accumulated errors in multiple bending processes, positioning elements such as a pressure plate and a positioning pin need to be added during designing the die.
Preferably, in step 3, the flat plate structure after the part is spread on the plate material can be punched and formed by a punch in one or more steps.
Preferably, the structural shape of the flat plate piece can be cut out on an iron plate by using a laser cutting mode in the step 3.
Preferably, for a blank material with a pre-processed hole, if the hole is located in a bending deformation area during bending, the shape of the hole is stretched and deformed after bending, in order to avoid the hole positions distributed in the bending deformation area, the distance between the edges of the hole is generally ensured to be L more than or equal to 3 times of material thickness, and for a long waist-shaped hole parallel to a bending line, the distance between the edges of the hole is generally ensured to be L more than or equal to 4 times of material thickness in order to ensure the bending precision and prevent the hole positions from deforming.
Preferably, in step 4, the riveting member is a rivet pressing stud, a rivet pressing nut, or a rivet pressing screw, which are commonly used.
Preferably, in the step 5, for 90-degree bending, in order to facilitate forming, the height h of a right-angle side of the workpiece must be more than or equal to 2t, and if the height h of a straight side of a bending part is less than 2t, the height of a bent side is increased, so that the bending part is processed to a proper size after being bent and formed; or the bending deformation area is bent after the shallow groove is machined, and when a bent part with oblique angles on the bent side edge, namely the bending deformation area, is on the oblique line, the workpiece deforms after bending due to the fact that the straight line height of the tail end of the oblique line is low.
Preferably, in the step 5, the bending direction is determined by positioning the punched fracture zone of the blank as far as possible inside the bending member to prevent the microcracks in the fracture zone from spreading into cracks under the action of the tensile stress on the outside, and if the bending is necessary in two directions due to the restriction of the part structure, the bending radius is increased as far as possible or other processing measures are adopted, and if the bending is necessary in multiple directions, the bending line is bent at a certain angle with the fiber direction or is annealed and then bent.
Compared with the prior art, the invention has the beneficial effects that: the method for improving the precision of the sheet metal part has the advantages of high precision of the part, simple process, good universality, no need of improvement on the appearance quality of the product, reduction in production cost and reduction in the weight of the product.
Detailed Description
The present invention will now be described in more detail by way of examples, which are given by way of illustration only and are not intended to limit the scope of the present invention in any way.
The invention provides a technical scheme that: a method for improving the precision of a sheet metal part comprises the following steps:
step 1: selecting materials: selecting a board with uniform texture, and knowing related information about the board so as to select a stable process parameter for processing;
step 2: drawing: unfolding a structural part to be processed into a flat plate piece, and drawing a graph according to the unfolded flat plate piece;
and step 3: blanking: when NC blanking is carried out, firstly, a numerical control machining program is compiled, namely, a drawn expansion diagram is compiled into a program which can be recognized by an NC numerical control machining machine tool by using programming software, and the program is arranged on an iron plate step by step according to the programs to punch the structural shape of the flat plate;
and 4, step 4: and (4) riveting: the riveting piece is subjected to riveting operation through a punch press or a hydraulic riveting press, and is riveted on the sheet metal part;
and 5: bending: the method comprises the following steps of folding a 2D flat plate into a 3D part, wherein the machining of the 3D part needs a folding bed and a corresponding bending die to complete operation, and according to a certain bending sequence, the principle is that the next knife is firstly folded without interference and then is folded with interference;
step 6: anti-rebound: the pressure in the bending process is properly increased, the loading time is prolonged, and for workpieces with higher requirements on processing precision, the edge part of the whole plate can be removed during blanking, and reinforcing ribs are pressed in a bending area if possible to improve the rigidity of the part and inhibit resilience;
and 7: welding: welding a plurality of parts together to achieve the purpose of processing or welding the edge seams of single parts;
and 8: assembling: a plurality of parts or assemblies are assembled together according to a certain mode to form a complete sheet metal part.
The first embodiment is as follows:
selecting materials: selecting a board with uniform texture, and knowing related information about the board so as to select a stable process parameter for processing; drawing: unfolding a structural part to be processed into a flat plate piece, and drawing a graph according to the unfolded flat plate piece; blanking: when NC blanking is carried out, firstly, a numerical control machining program is compiled, namely, a drawn expansion diagram is compiled into a program which can be recognized by an NC numerical control machining machine tool by using programming software, and the program is arranged on an iron plate step by step according to the programs to punch the structural shape of the flat plate; and (4) riveting: the riveting piece is subjected to riveting operation through a punch press or a hydraulic riveting press, and is riveted on the sheet metal part; bending: the method comprises the following steps of folding a 2D flat plate into a 3D part, wherein the machining of the 3D part needs a folding bed and a corresponding bending die to complete operation, and according to a certain bending sequence, the principle is that the next knife is firstly folded without interference and then is folded with interference; anti-rebound: the pressure in the bending process is properly increased, the loading time is prolonged, and for workpieces with higher requirements on processing precision, the edge part of the whole plate can be removed during blanking, and reinforcing ribs are pressed in a bending area if possible to improve the rigidity of the part and inhibit resilience; welding: welding a plurality of parts together to achieve the purpose of processing or welding the edge seams of single parts; assembling: a plurality of parts or assemblies are assembled together according to a certain mode to form a complete sheet metal part.
Example two:
in the first embodiment, the following steps are added:
in step 1, the detailed conditions of the plate manufacturer, such as production license, quality certificate, main product detection report, etc., should be known in detail, and then various data of the manufacturer are comprehensively analyzed to determine whether the requirements of production can be met.
Selecting materials: selecting a board with uniform texture, and knowing related information about the board so as to select a stable process parameter for processing; drawing: unfolding a structural part to be processed into a flat plate piece, and drawing a graph according to the unfolded flat plate piece; blanking: when NC blanking is carried out, firstly, a numerical control machining program is compiled, namely, a drawn expansion diagram is compiled into a program which can be recognized by an NC numerical control machining machine tool by using programming software, and the program is arranged on an iron plate step by step according to the programs to punch the structural shape of the flat plate; and (4) riveting: the riveting piece is subjected to riveting operation through a punch press or a hydraulic riveting press, and is riveted on the sheet metal part; bending: the method comprises the following steps of folding a 2D flat plate into a 3D part, wherein the machining of the 3D part needs a folding bed and a corresponding bending die to complete operation, and according to a certain bending sequence, the principle is that the next knife is firstly folded without interference and then is folded with interference; anti-rebound: the pressure in the bending process is properly increased, the loading time is prolonged, and for workpieces with higher requirements on processing precision, the edge part of the whole plate can be removed during blanking, and reinforcing ribs are pressed in a bending area if possible to improve the rigidity of the part and inhibit resilience; welding: welding a plurality of parts together to achieve the purpose of processing or welding the edge seams of single parts; assembling: a plurality of parts or assemblies are assembled together according to a certain mode to form a complete sheet metal part.
Example three:
in the second embodiment, the following steps are added:
in step 2, pre-processing the process holes, grooves and notches, in order to prevent the materials from cracking caused by uneven stress during bending, the process holes are generally pre-grooved or punched, the groove width K is generally more than or equal to t, the groove depth L is more than or equal to t + r + K/2, and in order to prevent accumulated errors in the multiple bending process, positioning elements such as a pressure plate, a positioning pin and the like need to be added during the design of the die.
Selecting materials: selecting a board with uniform texture, and knowing related information about the board so as to select a stable process parameter for processing; drawing: unfolding a structural part to be processed into a flat plate piece, and drawing a graph according to the unfolded flat plate piece; blanking: when NC blanking is carried out, firstly, a numerical control machining program is compiled, namely, a drawn expansion diagram is compiled into a program which can be recognized by an NC numerical control machining machine tool by using programming software, and the program is arranged on an iron plate step by step according to the programs to punch the structural shape of the flat plate; and (4) riveting: the riveting piece is subjected to riveting operation through a punch press or a hydraulic riveting press, and is riveted on the sheet metal part; bending: the method comprises the following steps of folding a 2D flat plate into a 3D part, wherein the machining of the 3D part needs a folding bed and a corresponding bending die to complete operation, and according to a certain bending sequence, the principle is that the next knife is firstly folded without interference and then is folded with interference; anti-rebound: the pressure in the bending process is properly increased, the loading time is prolonged, and for workpieces with higher requirements on processing precision, the edge part of the whole plate can be removed during blanking, and reinforcing ribs are pressed in a bending area if possible to improve the rigidity of the part and inhibit resilience; welding: welding a plurality of parts together to achieve the purpose of processing or welding the edge seams of single parts; assembling: a plurality of parts or assemblies are assembled together according to a certain mode to form a complete sheet metal part.
Example four:
in the third embodiment, the following steps are added:
in the step 3, the flat plate structure after the part is unfolded can be punched and formed on the plate by one step or multiple steps by adopting a punch; the structural shape of the flat plate piece can also be cut out on an iron plate by utilizing a laser cutting mode.
Selecting materials: selecting a board with uniform texture, and knowing related information about the board so as to select a stable process parameter for processing; drawing: unfolding a structural part to be processed into a flat plate piece, and drawing a graph according to the unfolded flat plate piece; blanking: when NC blanking is carried out, firstly, a numerical control machining program is compiled, namely, a drawn expansion diagram is compiled into a program which can be recognized by an NC numerical control machining machine tool by using programming software, and the program is arranged on an iron plate step by step according to the programs to punch the structural shape of the flat plate; and (4) riveting: the riveting piece is subjected to riveting operation through a punch press or a hydraulic riveting press, and is riveted on the sheet metal part; bending: the method comprises the following steps of folding a 2D flat plate into a 3D part, wherein the machining of the 3D part needs a folding bed and a corresponding bending die to complete operation, and according to a certain bending sequence, the principle is that the next knife is firstly folded without interference and then is folded with interference; anti-rebound: the pressure in the bending process is properly increased, the loading time is prolonged, and for workpieces with higher requirements on processing precision, the edge part of the whole plate can be removed during blanking, and reinforcing ribs are pressed in a bending area if possible to improve the rigidity of the part and inhibit resilience; welding: welding a plurality of parts together to achieve the purpose of processing or welding the edge seams of single parts; assembling: a plurality of parts or assemblies are assembled together according to a certain mode to form a complete sheet metal part.
Example five:
in the fourth example, the following steps were added:
for a blank material with a pre-processed hole, if the hole is located in a bending deformation area during bending, the shape of the hole can be stretched and deformed after bending, in order to avoid the hole positions distributed in the bending deformation area, the distance between the edges of the hole is generally ensured to be L being more than or equal to 3 times of material thickness, and for a long waist-shaped hole parallel to a bending line, the distance between the edges of the hole is generally ensured to be L being more than or equal to 4 times of material thickness in order to ensure the bending precision and prevent the hole positions from deforming.
Selecting materials: selecting a board with uniform texture, and knowing related information about the board so as to select a stable process parameter for processing; drawing: unfolding a structural part to be processed into a flat plate piece, and drawing a graph according to the unfolded flat plate piece; blanking: when NC blanking is carried out, firstly, a numerical control machining program is compiled, namely, a drawn expansion diagram is compiled into a program which can be recognized by an NC numerical control machining machine tool by using programming software, and the program is arranged on an iron plate step by step according to the programs to punch the structural shape of the flat plate; and (4) riveting: the riveting piece is subjected to riveting operation through a punch press or a hydraulic riveting press, and is riveted on the sheet metal part; bending: the method comprises the following steps of folding a 2D flat plate into a 3D part, wherein the machining of the 3D part needs a folding bed and a corresponding bending die to complete operation, and according to a certain bending sequence, the principle is that the next knife is firstly folded without interference and then is folded with interference; anti-rebound: the pressure in the bending process is properly increased, the loading time is prolonged, and for workpieces with higher requirements on processing precision, the edge part of the whole plate can be removed during blanking, and reinforcing ribs are pressed in a bending area if possible to improve the rigidity of the part and inhibit resilience; welding: welding a plurality of parts together to achieve the purpose of processing or welding the edge seams of single parts; assembling: a plurality of parts or assemblies are assembled together according to a certain mode to form a complete sheet metal part.
Example six:
in the fifth example, the following steps were added:
in step 4, the riveting member generally adopts a rivet pressing stud, a rivet pressing nut and a rivet pressing screw.
Selecting materials: selecting a board with uniform texture, and knowing related information about the board so as to select a stable process parameter for processing; drawing: unfolding a structural part to be processed into a flat plate piece, and drawing a graph according to the unfolded flat plate piece; blanking: when NC blanking is carried out, firstly, a numerical control machining program is compiled, namely, a drawn expansion diagram is compiled into a program which can be recognized by an NC numerical control machining machine tool by using programming software, and the program is arranged on an iron plate step by step according to the programs to punch the structural shape of the flat plate; and (4) riveting: the riveting piece is subjected to riveting operation through a punch press or a hydraulic riveting press, and is riveted on the sheet metal part; bending: the method comprises the following steps of folding a 2D flat plate into a 3D part, wherein the machining of the 3D part needs a folding bed and a corresponding bending die to complete operation, and according to a certain bending sequence, the principle is that the next knife is firstly folded without interference and then is folded with interference; anti-rebound: the pressure in the bending process is properly increased, the loading time is prolonged, and for workpieces with higher requirements on processing precision, the edge part of the whole plate can be removed during blanking, and reinforcing ribs are pressed in a bending area if possible to improve the rigidity of the part and inhibit resilience; welding: welding a plurality of parts together to achieve the purpose of processing or welding the edge seams of single parts; assembling: a plurality of parts or assemblies are assembled together according to a certain mode to form a complete sheet metal part.
Example seven:
in example six, the following steps were added:
in the step 5, for 90-degree bending, in order to facilitate forming, the height h of a right-angle edge of a workpiece is required to be more than or equal to 2t, if the height h of a straight edge of a part needing to be bent is designed to be less than 2t, the height of the bent edge is required to be increased, and the bent part is processed to be in a proper size after being bent and formed; or the shallow groove is processed in the bending deformation area and then bent, when a bending part with oblique angles on the bending side edge, namely the bending deformation area, is on the oblique line, the workpiece deforms after bending due to the fact that the straight line height of the tail end of the oblique line is low; when the bending direction is determined, the blanking fracture zone of the blank is positioned at the inner side of the bending piece as much as possible, the micro-cracks in the fracture zone are prevented from expanding into cracks under the action of the tensile stress at the outer side, if the bending is limited by the structure of the part and needs to be carried out in two directions, the bending radius is increased as much as possible or other process measures are adopted, and if the bending is carried out in multiple directions, the bending line and the fiber direction form a certain angle or are subjected to annealing treatment and then are bent.
Selecting materials: selecting a board with uniform texture, and knowing related information about the board so as to select a stable process parameter for processing; drawing: unfolding a structural part to be processed into a flat plate piece, and drawing a graph according to the unfolded flat plate piece; blanking: when NC blanking is carried out, firstly, a numerical control machining program is compiled, namely, a drawn expansion diagram is compiled into a program which can be recognized by an NC numerical control machining machine tool by using programming software, and the program is arranged on an iron plate step by step according to the programs to punch the structural shape of the flat plate; and (4) riveting: the riveting piece is subjected to riveting operation through a punch press or a hydraulic riveting press, and is riveted on the sheet metal part; bending: the method comprises the following steps of folding a 2D flat plate into a 3D part, wherein the machining of the 3D part needs a folding bed and a corresponding bending die to complete operation, and according to a certain bending sequence, the principle is that the next knife is firstly folded without interference and then is folded with interference; anti-rebound: the pressure in the bending process is properly increased, the loading time is prolonged, and for workpieces with higher requirements on processing precision, the edge part of the whole plate can be removed during blanking, and reinforcing ribs are pressed in a bending area if possible to improve the rigidity of the part and inhibit resilience; welding: welding a plurality of parts together to achieve the purpose of processing or welding the edge seams of single parts; assembling: a plurality of parts or assemblies are assembled together according to a certain mode to form a complete sheet metal part.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A method for improving the precision of a sheet metal part is characterized by comprising the following steps: the method comprises the following steps:
step 1: selecting materials: selecting a board with uniform texture, and knowing related information about the board so as to select a stable process parameter for processing;
step 2: drawing: unfolding a structural part to be processed into a flat plate piece, and drawing a graph according to the unfolded flat plate piece;
and step 3: blanking: when NC blanking is carried out, firstly, a numerical control machining program is compiled, namely, a drawn expansion diagram is compiled into a program which can be recognized by an NC numerical control machining machine tool by using programming software, and the program is arranged on an iron plate step by step according to the programs to punch the structural shape of the flat plate;
and 4, step 4: and (4) riveting: the riveting piece is subjected to riveting operation through a punch press or a hydraulic riveting press, and is riveted on the sheet metal part;
and 5: bending: the method comprises the following steps of folding a 2D flat plate into a 3D part, wherein the machining of the 3D part needs a folding bed and a corresponding bending die to complete operation, and according to a certain bending sequence, the principle is that the next knife is firstly folded without interference and then is folded with interference;
step 6: anti-rebound: the pressure in the bending process is properly increased, the loading time is prolonged, and for workpieces with higher requirements on processing precision, the edge part of the whole plate can be removed during blanking, and reinforcing ribs are pressed in a bending area if possible to improve the rigidity of the part and inhibit resilience;
and 7: welding: welding a plurality of parts together to achieve the purpose of processing or welding the edge seams of single parts;
and 8: assembling: a plurality of parts or assemblies are assembled together according to a certain mode to form a complete sheet metal part.
2. The method for improving the precision of the sheet metal part as claimed in claim 1, wherein: in step 1, the detailed conditions of the plate manufacturer, such as a production license, a quality certificate, a main product detection report, etc., should be known in detail, and then various data of the manufacturer are comprehensively analyzed to determine whether the requirements of production can be met.
3. The method for improving the precision of the sheet metal part as claimed in claim 1, wherein: in the step 2, the fabrication holes, grooves and notches are preprocessed, in order to prevent the material from generating cracks due to uneven stress in bending, the fabrication holes are generally needed to be pre-grooved or punched, the groove width K is generally more than or equal to t, the groove depth L is more than or equal to t + r + K/2, and in order to prevent accumulated errors in the multiple bending processes, positioning elements such as a pressure plate and a positioning pin need to be added when the die is designed.
4. The method for improving the precision of the sheet metal part as claimed in claim 1, wherein: and 3, punching the flat plate structure formed by spreading the part on the plate by one or more steps by using a punch.
5. The method for improving the precision of the sheet metal part as claimed in claim 1, wherein: in step 3, the structural shape of the flat plate piece can be cut out on an iron plate by using a laser cutting mode.
6. The method for improving the precision of the sheet metal part as claimed in claim 1, wherein: for the blank material with the pre-processed holes, if the holes are located in a bending deformation area during bending, the shape of the holes can be stretched and deformed after bending, in order to avoid the hole positions being distributed in the bending deformation area, the hole edge distance generally ensures that L is more than or equal to 3 times of material thickness, and for long waist-shaped holes parallel to a bending line, the hole edge distance generally ensures that L is more than or equal to 4 times of material thickness in order to ensure the bending precision and prevent the hole positions from deforming.
7. The method for improving the precision of the sheet metal part as claimed in claim 1, wherein: in step 4, the riveting piece generally adopts a press riveting stud, a press riveting nut and a press riveting screw.
8. The method for improving the precision of the sheet metal part as claimed in claim 1, wherein: in the step 5, for 90-degree bending, the height h of a right-angle side of a workpiece is required to be more than or equal to 2t for forming, and if the height h of a straight side of a part needing to be bent is designed to be less than 2t, the height of the bent side is increased, so that the bent part is processed to be in a proper size after being bent and formed; or the bending deformation area is bent after the shallow groove is machined, and when a bent part with oblique angles on the bent side edge, namely the bending deformation area, is on the oblique line, the workpiece deforms after bending due to the fact that the straight line height of the tail end of the oblique line is low.
9. The method for improving the precision of the sheet metal part as claimed in claim 1, wherein: in the step 5, the blanking fracture zone of the blank is positioned at the inner side of the bending piece as much as possible when the bending direction is determined, the micro-cracks in the fracture zone are prevented from expanding into cracks under the action of the tensile stress at the outer side, if the bending is carried out in two directions due to the limitation of the part structure, the bending radius is increased as much as possible or other process measures are adopted, and if the bending is carried out in multiple directions, the bending line and the fiber direction form a certain angle or are bent after annealing treatment.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114227011A (en) * | 2021-12-31 | 2022-03-25 | 苏州铭尚精密钣金有限公司 | Production system for sheet metal part of artificial door lock of intelligent door lock |
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