CN112650144A - Assembly method and device for hot forming part without repairing - Google Patents
Assembly method and device for hot forming part without repairing Download PDFInfo
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- CN112650144A CN112650144A CN202011507506.3A CN202011507506A CN112650144A CN 112650144 A CN112650144 A CN 112650144A CN 202011507506 A CN202011507506 A CN 202011507506A CN 112650144 A CN112650144 A CN 112650144A
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- hot forming
- forming part
- assembled
- spigot
- end frame
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/19—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path
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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
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/31—From computer integrated manufacturing till monitoring
- G05B2219/31282—Data acquisition, BDE MDE
Abstract
The application discloses a repair-free assembly method and a repair-free assembly device for hot forming parts, and the method comprises the following steps: collecting contour data of an inner spigot of a hot forming part to be assembled, and constructing a contour curve model of the inner spigot of the hot forming part according to the contour data; obtaining a contour curve of the inner spigot of the hot forming part through reverse modeling fitting according to the contour curve model, and determining contour models of the outer spigot of the end frame and the lock bottom matched with the inner spigot of the hot forming part according to the contour curve; and processing and preparing the end frame and the lock bottom according to the outline model of the end frame outer spigot and the lock bottom, and carrying out butt joint assembly on the hot forming part to be assembled, the end frame and the lock bottom. The application solves the technical problem that the efficiency of hot forming part assembly in the prior art is lower.
Description
Technical Field
The application relates to the technical field of machining, in particular to a repair-free assembling method and device for a hot forming part.
Background
The hot forming part is a part which is continuously hot-extruded and formed at high temperature, because the hot forming part is continuously hot-extruded and formed at high temperature, the hot forming part is influenced by the hot fluidity, the flow uniformity, the shrinkage deformation and the like of materials at high temperature and room temperature, the profile tolerance deviation of the hot forming part is larger, and for parts with higher precision requirements, such as butt seam rabbets, matching molded surfaces and the like, the hot forming part and the end frame have the problems of difficult butt joint and poor butt joint precision in the actual butt joint process,
at present, in order to ensure that the hot forming part is successfully butted with the end frame, a large amount of grinding and repairing are carried out on the prepared hot forming part by a bench worker, and then the hot forming part after grinding and repairing is matched and butted with the end frame. However, in the prior art, the hot forming part is polished and repaired by a bench worker, a large amount of time is consumed, the hot forming part processing time is long, and the hot forming part assembling efficiency is low.
Disclosure of Invention
The technical problem that this application was solved is: aiming at the problem of low assembly efficiency of thermoformed parts in the prior art, the invention provides a repair-free assembly method and a repair-free assembly device for thermoformed parts, in the scheme provided by the embodiment of the invention, a contour curve model of a thermoformed part inner spigot is constructed by collecting contour data of the thermoformed part inner spigot to be assembled, then a contour curve of the thermoformed part inner spigot is obtained by reverse modeling fitting according to the contour curve model, a contour model of an end frame outer spigot and a lock bottom matched with the thermoformed part inner spigot is determined according to the contour curve, then an end frame and the lock bottom are obtained by processing and preparing according to the contour models of the end frame outer spigot and the lock bottom, then the thermoformed parts to be assembled are butt-jointed with the end frame and the lock bottom, namely the end frame and the lock bottom matched with the thermoformed part inner spigot are processed and prepared according to the contour curve of the thermoformed part inner spigot to be assembled, need not to polish the repair through the bench worker to the thermoforming part, it is longer to have reduced thermoforming part process time, and then has improved the efficiency of thermoforming part assembly.
In a first aspect, an embodiment of the present application provides a repair-free assembling method for a thermoformed part, including:
collecting contour data of an inner spigot of a hot forming part to be assembled, and constructing a contour curve model of the inner spigot of the hot forming part according to the contour data;
obtaining a contour curve of the inner spigot of the hot forming part through reverse modeling fitting according to the contour curve model, and determining contour models of the outer spigot of the end frame and the lock bottom matched with the inner spigot of the hot forming part according to the contour curve;
and processing and preparing the end frame and the lock bottom according to the outline model of the end frame outer spigot and the lock bottom, and carrying out butt joint assembly on the hot forming part to be assembled, the end frame and the lock bottom.
In the scheme provided by the embodiment of the application, the contour curve model of the inner spigot of the hot forming part is constructed by collecting the contour data of the inner spigot of the hot forming part to be assembled, then, the contour curve of the inner spigot of the hot forming part is obtained by reverse modeling and fitting according to the contour curve model, determining a contour model of the end frame outer spigot and the lock bottom matched with the inner spigot of the hot forming part according to the contour curve, then processing and preparing an end frame and a lock bottom according to outline models of an end frame outer spigot and the lock bottom, then carrying out butt joint assembly on the hot forming part to be assembled, the end frame and the lock bottom, the end frame and the lock bottom matched with the contour curve of the inner spigot of the hot forming part to be assembled are machined and prepared according to the contour curve of the inner spigot of the hot forming part to be assembled, the hot forming part does not need to be polished and repaired by a bench worker, the processing time of the hot forming part is shortened, and the assembling efficiency of the hot forming part is improved.
Optionally, collecting profile data of the female end of the hot formed part to be assembled comprises:
fixedly installing the hot forming part to be assembled on a machine tool or a three-coordinate device through a preset clamp;
and acquiring coordinates of a plurality of points on the inner spigot of the hot forming part to be assembled through a preset acquisition strategy to obtain the profile data.
Optionally, the preset acquisition strategy includes:
densely collecting the upper corners and the arc positions of the inner rabbets of the hot forming parts to be assembled;
and carrying out sparse collection on other positions on the inner spigot of the hot forming part to be assembled.
Optionally, the processing and preparation of the end frame and the lock bottom according to the contour model of the end frame outer spigot and the lock bottom includes:
and constructing a numerical control machining program according to the outline models of the end frame outer spigot and the lock bottom, and machining and preparing according to the numerical control machining program to obtain the end frame and the lock bottom.
In a second aspect, an embodiment of the present application provides a repair-free assembling device for a thermoformed part, the device including:
the modeling unit is used for acquiring contour data of the inner spigot of the hot forming part to be assembled and constructing a contour curve model of the inner spigot of the hot forming part according to the contour data;
the determining unit is used for obtaining a contour curve of the inner spigot of the hot forming part through reverse modeling fitting according to the contour curve model, and determining contour models of the outer spigot of the end frame and the lock bottom matched with the inner spigot of the hot forming part according to the contour curve;
and the assembling unit is used for processing and preparing the end frame and the lock bottom according to the outline models of the end frame outer spigot and the lock bottom, and butt-jointing and assembling the hot-formed part to be assembled with the end frame and the lock bottom.
Optionally, the modeling unit is specifically configured to:
fixedly installing the hot forming part to be assembled on a machine tool or a three-coordinate device through a preset clamp;
and acquiring coordinates of a plurality of points on the inner spigot of the hot forming part to be assembled through a preset acquisition strategy to obtain the profile data.
Optionally, the preset acquisition strategy includes:
densely collecting the upper corners and the arc positions of the inner rabbets of the hot forming parts to be assembled;
and carrying out sparse collection on other positions on the inner spigot of the hot forming part to be assembled.
Optionally, the assembly unit is specifically configured to:
and constructing a numerical control machining program according to the outline models of the end frame outer spigot and the lock bottom, and machining and preparing according to the numerical control machining program to obtain the end frame and the lock bottom.
Drawings
FIG. 1 is a schematic flow chart illustrating a repair-free assembly method for a thermoformed part according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a front box body for weight reduction according to an embodiment of the present application;
FIG. 3 is a schematic structural view of an inner spigot of a hot formed part according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of an assembling apparatus for hot forming parts without repair according to an embodiment of the present disclosure.
Detailed Description
In the solutions provided in the embodiments of the present application, the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. 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 application.
The repair-free assembling method for the hot forming part provided by the embodiment of the application is further described in detail with reference to the attached drawings, and the specific implementation manner of the method can include the following steps (the method flow is shown in fig. 1):
step 101, collecting contour data of an inner spigot of a hot forming part to be assembled, and constructing a contour curve model of the inner spigot of the hot forming part according to the contour data.
In one possible implementation, collecting profile data of a male end in a hot formed part to be assembled includes: fixedly installing the hot forming part to be assembled on a machine tool or a three-coordinate device through a preset clamp; and acquiring coordinates of a plurality of points on the inner spigot of the hot forming part to be assembled through a preset acquisition strategy to obtain the profile data.
In the scheme provided by the embodiment of the application, the hot forming part to be assembled can be any three-section type hot forming box body in the front closing and weighting box body, wherein the front closing and weighting box body is formed by welding the three-section forming box body and the four-section machining end frame. Specifically, the structure of any heavy front box is shown in fig. 2.
In the solution provided in the embodiment of the present application, in order to match the hot-formed part to be assembled, a contour curve of the female end on the hot-formed part to be assembled needs to be constructed. The coordinates of a plurality of points of the female end of the thermoformed part to be assembled need to be collected before the contour curve of the female end of the thermoformed part to be assembled is constructed.
Further, in the scheme provided by the embodiment of the application, a plurality of sampling points are set on the inner spigot of the hot forming part to be assembled through a pre-programmed numerical control sampling point program, and the denser the sampling points are theoretically set, the more accurate the subsequently-fitted inner spigot profile curve model is. Specifically, there are various ways to collect the coordinates of a plurality of points on the inner spigot of the hot-formed part to be assembled through a preset collection strategy, and one of the ways is taken as an example for description.
Further, in a possible implementation manner, the preset acquisition policy includes: densely collecting the upper corners and the arc positions of the inner rabbets of the hot forming parts to be assembled; and carrying out sparse collection on other positions on the inner spigot of the hot forming part to be assembled.
Further, in the scheme provided by the embodiment of the application, when the contour data of the inner spigot of the hot forming part to be assembled is acquired according to a pre-programmed numerical control point acquisition program, the actual geometric coordinates of each point on the inner spigot of the hot forming part to be assembled can be acquired point by point through the edge finder probe according to the program, for example, the point acquisition is performed once every 5mm in the height direction of the cross section of the cylinder section. When the point is acquired by the probe of the edge finder, the contact force is required to be the same in each acquisition, namely the pointer of the dial indicator on the edge finder returns to zero to be regarded as in-place contact. Specifically, referring to fig. 3, a schematic structural diagram of an inner seam allowance of a hot-formed part according to an embodiment of the present application is provided.
102, obtaining a contour curve of the inner spigot of the hot forming part through reverse modeling fitting according to the contour curve model, and determining contour models of the outer spigot of the end frame and the lock bottom matched with the inner spigot of the hot forming part according to the contour curve.
Specifically, in the solution provided in the embodiment of the present application, after the contour curve model of the inner spigot of the thermoformed part is constructed according to the contour data, the contour curve of the inner spigot of the thermoformed part needs to be obtained by inverse modeling and fitting according to the contour curve model.
103, processing and preparing the end frame and the lock bottom according to the outline model of the end frame outer spigot and the lock bottom, and carrying out butt joint assembly on the thermal forming part to be assembled, the end frame and the lock bottom.
In one possible implementation manner, the processing and preparing the end frame and the lock bottom according to the contour model of the end frame outer spigot and the lock bottom comprises: and constructing a numerical control machining program according to the outline models of the end frame outer spigot and the lock bottom, and machining and preparing according to the numerical control machining program to obtain the end frame and the lock bottom.
Specifically, in the scheme provided by the embodiment of the application, the reversely constructed curve model of the actual contour of the inner spigot of the hot forming part to be assembled is subjected to 180-degree mirror image processing, and then the reprogramming is carried out according to the curve model subjected to the mirror image processing, so that the outer spigot and the lock bottom of the end frame are adaptively and cooperatively processed, and the height coincidence of the inner spigot of the hot forming part to be assembled and the outer spigot of the end frame is ensured. After the end frame is processed and prepared, the inner seam allowance of the thermal forming part to be assembled, the outer seam allowance of the end frame and the lock bottom are assembled, and adaptive butt joint assembly of the thermal forming part to be assembled, the end frame and locking is completed.
In the scheme provided by the embodiment of the application, the contour curve model of the inner spigot of the hot forming part is constructed by collecting the contour data of the inner spigot of the hot forming part to be assembled, then, the contour curve of the inner spigot of the hot forming part is obtained by reverse modeling and fitting according to the contour curve model, determining a contour model of the end frame outer spigot and the lock bottom matched with the inner spigot of the hot forming part according to the contour curve, then processing and preparing an end frame and a lock bottom according to outline models of an end frame outer spigot and the lock bottom, then carrying out butt joint assembly on the hot forming part to be assembled, the end frame and the lock bottom, the end frame and the lock bottom matched with the contour curve of the inner spigot of the hot forming part to be assembled are machined and prepared according to the contour curve of the inner spigot of the hot forming part to be assembled, the hot forming part does not need to be polished and repaired by a bench worker, the processing time of the hot forming part is shortened, and the assembling efficiency of the hot forming part is improved.
Based on the same inventive concept as the method shown in fig. 1, the embodiment of the present application provides a repair-free assembling device for hot forming parts, referring to fig. 4, the device includes:
the modeling unit 401 is used for acquiring contour data of the inner spigot of the hot forming part to be assembled and constructing a contour curve model of the inner spigot of the hot forming part according to the contour data;
a determining unit 402, configured to obtain a contour curve of the inner seam allowance of the thermoformed part by inverse modeling and fitting according to the contour curve model, and determine, according to the contour curve, contour models of an end frame outer seam allowance and a lock bottom that are matched with the inner seam allowance of the thermoformed part;
and the assembling unit 403 is configured to process and prepare an end frame and a lock bottom according to the outline model of the end frame outer spigot and the lock bottom, and perform butt assembly on the thermoformed part to be assembled, the end frame and the lock bottom.
Optionally, the modeling unit 401 is specifically configured to: fixedly installing the hot forming part to be assembled on a machine tool or a three-coordinate device through a preset clamp; and acquiring coordinates of a plurality of points on the inner spigot of the hot forming part to be assembled through a preset acquisition strategy to obtain the profile data.
Optionally, the preset acquisition strategy includes: densely collecting the upper corners and the arc positions of the inner rabbets of the hot forming parts to be assembled; and carrying out sparse collection on other positions on the inner spigot of the hot forming part to be assembled.
Optionally, the assembling unit 403 is specifically configured to: and constructing a numerical control machining program according to the outline models of the end frame outer spigot and the lock bottom, and machining and preparing according to the numerical control machining program to obtain the end frame and the lock bottom.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (8)
1. A repair-free assembly method for thermoformed parts, comprising:
collecting contour data of an inner spigot of a hot forming part to be assembled, and constructing a contour curve model of the inner spigot of the hot forming part according to the contour data;
obtaining a contour curve of the inner spigot of the hot forming part through reverse modeling fitting according to the contour curve model, and determining contour models of the outer spigot of the end frame and the lock bottom matched with the inner spigot of the hot forming part according to the contour curve;
and processing and preparing the end frame and the lock bottom according to the outline model of the end frame outer spigot and the lock bottom, and carrying out butt joint assembly on the hot forming part to be assembled, the end frame and the lock bottom.
2. The method of claim 1, wherein collecting profile data for the female end of the thermoformed parts to be assembled comprises:
fixedly installing the hot forming part to be assembled on a machine tool or a three-coordinate device through a preset clamp;
and acquiring coordinates of a plurality of points on the inner spigot of the hot forming part to be assembled through a preset acquisition strategy to obtain the profile data.
3. The method of claim 2, wherein the preset acquisition strategy comprises:
densely collecting the upper corners and the arc positions of the inner rabbets of the hot forming parts to be assembled;
and carrying out sparse collection on other positions on the inner spigot of the hot forming part to be assembled.
4. The method of any one of claims 1 to 3, wherein the preparing the end bell and the lock base according to the contour model processing of the end bell outer spigot and the lock base comprises:
and constructing a numerical control machining program according to the outline models of the end frame outer spigot and the lock bottom, and machining and preparing according to the numerical control machining program to obtain the end frame and the lock bottom.
5. A repair-free assembling device for hot-formed parts is characterized by comprising:
the modeling unit is used for acquiring contour data of the inner spigot of the hot forming part to be assembled and constructing a contour curve model of the inner spigot of the hot forming part according to the contour data;
the determining unit is used for obtaining a contour curve of the inner spigot of the hot forming part through reverse modeling fitting according to the contour curve model, and determining contour models of the outer spigot of the end frame and the lock bottom matched with the inner spigot of the hot forming part according to the contour curve;
and the assembling unit is used for processing and preparing the end frame and the lock bottom according to the outline models of the end frame outer spigot and the lock bottom, and butt-jointing and assembling the hot-formed part to be assembled with the end frame and the lock bottom.
6. The apparatus of claim 5, wherein the modeling unit is specifically configured to:
fixedly installing the hot forming part to be assembled on a machine tool or a three-coordinate device through a preset clamp;
and acquiring coordinates of a plurality of points on the inner spigot of the hot forming part to be assembled through a preset acquisition strategy to obtain the profile data.
7. The apparatus of claim 6, wherein the preset acquisition strategy comprises:
densely collecting the upper corners and the arc positions of the inner rabbets of the hot forming parts to be assembled;
and carrying out sparse collection on other positions on the inner spigot of the hot forming part to be assembled.
8. The device according to any one of claims 5 to 7, characterized in that the assembly unit is specifically configured to:
and constructing a numerical control machining program according to the outline models of the end frame outer spigot and the lock bottom, and machining and preparing according to the numerical control machining program to obtain the end frame and the lock bottom.
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| CN202011507506.3A CN112650144B (en) | 2020-12-18 | 2020-12-18 | Assembly method and device for hot forming part without repairing |
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| CN202011507506.3A CN112650144B (en) | 2020-12-18 | 2020-12-18 | Assembly method and device for hot forming part without repairing |
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| CN112650144B CN112650144B (en) | 2023-02-24 |
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