CN109676834A - A kind of improvement technique of automobile moulding processing - Google Patents

A kind of improvement technique of automobile moulding processing Download PDF

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Publication number
CN109676834A
CN109676834A CN201811479309.8A CN201811479309A CN109676834A CN 109676834 A CN109676834 A CN 109676834A CN 201811479309 A CN201811479309 A CN 201811479309A CN 109676834 A CN109676834 A CN 109676834A
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China
Prior art keywords
software
process operation
processing
information
automobile
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CN201811479309.8A
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Chinese (zh)
Inventor
张华�
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QINGDAO ZEIT MOULD CO Ltd
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QINGDAO ZEIT MOULD CO Ltd
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Priority to CN201811479309.8A priority Critical patent/CN109676834A/en
Publication of CN109676834A publication Critical patent/CN109676834A/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00Moulds or cores; Details thereof or accessories therefor
    • B29C33/38Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
    • B29C33/3835Designing moulds, e.g. using CAD-CAM
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00Moulds or cores; Details thereof or accessories therefor
    • B29C33/38Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
    • B29C33/3842Manufacturing moulds, e.g. shaping the mould surface by machining
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0025Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

The invention discloses a kind of improvement techniques of automobile moulding processing, numerical control machining center is set, computer and AutoCAD software, HyperMesh software, AutodeskMoldflow simulation software, the ANSYS software for being built in computer, the machining code of numerical control machining center generates software, which includes the following steps.The present invention geometric manipulations and grid generation technique powerful using HyperMesh, quickly generate the excellent model of grid index, cooling scheme is optimized in MoldFlow, solves the problems, such as the warpage of instrument board and contraction substantially, avoids and re-molds bring cost and temporal loss;Then by prediction cutter distortion, error is compensated offline, improves machining accuracy for the first time and by vision-based detection mismachining tolerance, further processing is compensated in process;By error compensation twice, to improve the complex-curved machining accuracy of automobile injection molding moulding.

Description

A kind of improvement technique of automobile moulding processing
Technical field
The present invention relates to the improvement techniques that automobile parts processing technique field more particularly to a kind of automobile moulding are processed.
Background technique
Injection mold is a kind of tool for producing plasthetics;Also plasthetics complete structure and accurate dimension are to confer to Tool.Injection molding is a kind of processing method used when producing certain complex-shaped components in batches.It refers specifically to melt heated Plastics by injection molding machine high pressure inject die cavity obtain formed products after cooling and solidifying.
Traditional automobile large-sized plastic rubber part is since structure is complicated, and regional area thickness distribution is uneven, in injection moulding process Very big warpage and contraction problem are produced, also, since the mold accuracy of manufacture is not high, Product Precision is caused to further decrease.
Summary of the invention
The purpose of the present invention is to solve disadvantages existing in the prior art, and a kind of automobile moulding processing proposed Improvement technique, by the way that it is excellent quickly to generate grid index using the powerful geometric manipulations and grid generation technique of HyperMesh Good model, optimizes cooling scheme in MoldFlow, solves the problems, such as the warpage of instrument board and contraction substantially, avoids Re-mold bring cost and temporal loss;Then by prediction cutter distortion, error is compensated offline, is mentioned High machining accuracy for the first time by vision-based detection mismachining tolerance, further compensates processing in process;Pass through two Secondary error compensation, to improve the complex-curved machining accuracy of automobile injection molding moulding.
To achieve the goals above, present invention employs following technical solutions:
A kind of improvement technique of automobile moulding processing, is arranged numerical control machining center, computer and is built in computer AutoCAD software, HyperMesh software, AutodeskMoldflow simulation software, ANSYS software, numerical control machining center add Work code building software, the improvement technique the following steps are included:
The modeling and deformation analysis of S1, plastic parts: the three-dimensional mould of automobile moulding is established in the AutoCAD software of computer Type then passes through HyperMesh software finite element grid by the threedimensional model by HyperMesh Software Create mid-plane model The R-trias triangular mesh of generation is imported Moldflow simulation software by the R-trias triangular mesh for generating high quality In, carry out mold flow analysis modeling, obtain the not warpage for meeting production and contraction complex-curved automobile injection mold model and its Cooling system;
S2, cutter situation inspection;Part process model is imported under CAM environment, includes the 3D solid of part in process modeling Model, process operation program, the geometric drive information of process operation, the balance information that process operation is included, the processing of advance and retreat knife Trajectory parameters, the macroelement that advance and retreat knife is included, the cutter location information of machining locus and used tool-information;Read part Feature recognition result list;Feature recognition result list is feature identification as a result, having recorded the characteristic information that part is included, Cavity feature, hole characteristic, muscle feature, corner feature and contour feature including part;Choose the processing behaviour of advance and retreat knife interference checking Make and obtains relevant parameter information;The process operation for needing to carry out advance and retreat knife locus interference inspection is clicked, batch is supported to choose; Corresponding class is created in inside to the process operation of each selection and stores corresponding process operation parameter information, process operation parameter Information include process operation serial number, process operation type, the geometric drive information of process operation, process operation balance information, The detailed advance and retreat knife knife rail information that advance and retreat knife macroelement and macroelement include, is finally stored in a manner of list in inside Record all process operation classes of acquisition;Generate the machining locus of process operation;The internal interface of CAM software is called, is obtained The knife rail information of process operation calculates corresponding cutter path and shows in face of engineering staff;According to engineering staff's interaction The modified knife rail of the parameter in-time generatin of modification;Engineering staff is macro to corresponding advance and retreat knife according to the machining locus quickly generated Parameter is replaced, is inserted into, deletes, and system senses corresponding Parameters variation, internal interface is called, immediately to process operation It modifies, recalculates the cutter location of operation advance and retreat knife, generate new into withdrawing track.
S3, cutter distortion compensation: it is analyzed using surface characteristics of the AutoCAD software to threedimensional model, passes through curvature Nephanalysis finished surface each section feature of radius and slope predicts mismachining tolerance, using the biasing shape to error opposite direction At a new finished surface, machining code is obtained;
S4, the compensation of vision-based detection mismachining tolerance: numerical control machining center is processed according to the machining code that S2 is obtained, process In by the processing of Machine Vision Inspecting System real-time measurement numerically-controlled machine tool, obtain the collection of mismachining tolerance using Feedback Neural Network It closes, and establishes the compensation model of geometric error, then change G code and mismachining tolerance is compensated;
S5, mold carry out the processing of automobile moulding after processing is completed, according to injection mould processing method.
Preferably, the S1 specifically further includes the following contents: HyperMesh software by offset in the software, Trim function repairs the part of threedimensional model, completes mid-plane model.
Preferably, the S2 is specifically includes the following steps: to mould parts specificity analysis, and machined parameters are determining and cutter system The determination of system;Cutting force during prediction tool sharpening, the horizontal-shift after cutter stress is analyzed with ANSYS, thus Predict mismachining tolerance.
Preferably, the machining accuracy of the automobile moulding is 0.004mm.
Preferably, the grid Automatic Optimal function of smooth, cleanup, equivalence of the HyperMesh software Can, for optimizing the quality of grid.
Preferably, it is described for ANSYS when, using to the biasing of error opposite direction one new processing table of formation Face, during biasing, the error for prediction is constant value, and directly offset forms machined surface, and the error for prediction is not normal Value first finds out the error of key point, biases key point, the key point after biasing is linked to be a free form surface using CAD software, It is programmed using CAM software, obtains machining code and imported into the processing that numerical control machining center is compensated offline.
The invention has the following advantages:
1, using HyperMesh powerful geometric manipulations and grid generation technique, the excellent model of grid index is quickly generated, Cooling scheme is optimized in MoldFlow, the warpage of instrument board and contraction is solved the problems, such as substantially, avoids and re-mold Bring cost and temporal loss;
2, then error is compensated by prediction cutter distortion offline, improves machining accuracy for the first time, in process, By vision-based detection mismachining tolerance, further processing is compensated;
3, by error compensation twice, to improve the complex-curved machining accuracy of automobile injection molding moulding.
Detailed description of the invention
Fig. 1 is a kind of flow diagram of the improvement technique of automobile moulding processing proposed by the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
In the description of the present invention, it is to be understood that, term " on ", "lower", "front", "rear", "left", "right", "top", The orientation or positional relationship of the instructions such as "bottom", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, merely to just In description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with Specific orientation construction and operation, therefore be not considered as limiting the invention.
Referring to Fig.1, the improvement technique of a kind of automobile moulding processing, is arranged numerical control machining center, computer and is built in AutoCAD software, HyperMesh software, AutodeskMoldflow simulation software, the ANSYS software of computer, numerical control processing The machining code at center generates software, the improvement technique the following steps are included:
The modeling and deformation analysis of S1, plastic parts: the three-dimensional mould of automobile moulding is established in the AutoCAD software of computer Type then passes through HyperMesh software finite element grid by the threedimensional model by HyperMesh Software Create mid-plane model The R-trias triangular mesh of generation is imported Moldflow simulation software by the R-trias triangular mesh for generating high quality In, carry out mold flow analysis modeling, obtain the not warpage for meeting production and contraction complex-curved automobile injection mold model and its Cooling system;
S2, cutter situation inspection;Part process model is imported under CAM environment, includes the 3D solid of part in process modeling Model, process operation program, the geometric drive information of process operation, the balance information that process operation is included, the processing of advance and retreat knife Trajectory parameters, the macroelement that advance and retreat knife is included, the cutter location information of machining locus and used tool-information;Read part Feature recognition result list;Feature recognition result list is feature identification as a result, having recorded the characteristic information that part is included, Cavity feature, hole characteristic, muscle feature, corner feature and contour feature including part;Choose the processing behaviour of advance and retreat knife interference checking Make and obtains relevant parameter information;The process operation for needing to carry out advance and retreat knife locus interference inspection is clicked, batch is supported to choose; Corresponding class is created in inside to the process operation of each selection and stores corresponding process operation parameter information, process operation parameter Information include process operation serial number, process operation type, the geometric drive information of process operation, process operation balance information, The detailed advance and retreat knife knife rail information that advance and retreat knife macroelement and macroelement include, is finally stored in a manner of list in inside Record all process operation classes of acquisition;Generate the machining locus of process operation;The internal interface of CAM software is called, is obtained The knife rail information of process operation calculates corresponding cutter path and shows in face of engineering staff;According to engineering staff's interaction The modified knife rail of the parameter in-time generatin of modification;Engineering staff is macro to corresponding advance and retreat knife according to the machining locus quickly generated Parameter is replaced, is inserted into, deletes, and system senses corresponding Parameters variation, internal interface is called, immediately to process operation It modifies, recalculates the cutter location of operation advance and retreat knife, generate new into withdrawing track.
S3, cutter distortion compensation: it is analyzed using surface characteristics of the AutoCAD software to threedimensional model, passes through curvature Nephanalysis finished surface each section feature of radius and slope predicts mismachining tolerance, using the biasing shape to error opposite direction At a new finished surface, machining code is obtained;
S4, the compensation of vision-based detection mismachining tolerance: numerical control machining center is processed according to the machining code that S2 is obtained, process In by the processing of Machine Vision Inspecting System real-time measurement numerically-controlled machine tool, obtain the collection of mismachining tolerance using Feedback Neural Network It closes, and establishes the compensation model of geometric error, then change G code and mismachining tolerance is compensated;
S5, mold carry out the processing of automobile moulding after processing is completed, according to injection mould processing method.
The S1 specifically further includes the following contents: HyperMesh software passes through offset, trim function pair in the software The part of threedimensional model is repaired, and mid-plane model is completed, and the S2 is specifically includes the following steps: to mould parts characteristic point Analysis, machined parameters determination and the determination of tooling system;It predicts the cutting force during tool sharpening, analyzes knife with ANSYS Thus horizontal-shift after having stress predicts mismachining tolerance, the machining accuracy of the automobile moulding is 0.004mm, described The grid automatic majorization function of smooth, cleanup, equivalence of HyperMesh software, for optimizing the matter of grid Amount, it is described for ANSYS when, using to the biasing of error opposite direction one new finished surface of formation, biasing Cheng Zhong, the error for prediction are constant value, and directly offset forms machined surface, and the error for prediction is not constant value, first finds out pass The error of key point biases key point, the key point after biasing is linked to be a free form surface using CAD software, utilizes CAM software It is programmed, obtains machining code and imported into the processing that numerical control machining center is compensated offline.
In the present invention, using HyperMesh powerful geometric manipulations and grid generation technique, it is excellent quickly to generate grid index Good model, optimizes cooling scheme in MoldFlow, solves the problems, such as the warpage of instrument board and contraction substantially, avoids Re-mold bring cost and temporal loss;Then by prediction cutter distortion, error is compensated offline, is mentioned High machining accuracy for the first time by vision-based detection mismachining tolerance, further compensates processing in process;Pass through two Secondary error compensation, to improve the complex-curved machining accuracy of automobile injection molding moulding.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto, Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.

Claims (6)

1. a kind of improvement technique of automobile moulding processing, which is characterized in that setting numerical control machining center and is built in computer AutoCAD software, HyperMesh software, AutodeskMoldflow simulation software, the ANSYS software of computer, numerical control processing The machining code at center generates software, the improvement technique the following steps are included:
The modeling and deformation analysis of S1, plastic parts: the three-dimensional mould of automobile moulding is established in the AutoCAD software of computer Type then passes through HyperMesh software finite element grid by the threedimensional model by HyperMesh Software Create mid-plane model The R-trias triangular mesh of generation is imported Moldflow simulation software by the R-trias triangular mesh for generating high quality In, carry out mold flow analysis modeling, obtain the not warpage for meeting production and contraction complex-curved automobile injection mold model and its Cooling system;
S2, cutter situation inspection;Part process model is imported under CAM environment, includes the 3D solid of part in process modeling Model, process operation program, the geometric drive information of process operation, the balance information that process operation is included, the processing of advance and retreat knife Trajectory parameters, the macroelement that advance and retreat knife is included, the cutter location information of machining locus and used tool-information;Read part Feature recognition result list;Feature recognition result list is feature identification as a result, having recorded the characteristic information that part is included, Cavity feature, hole characteristic, muscle feature, corner feature and contour feature including part;Choose the processing behaviour of advance and retreat knife interference checking Make and obtains relevant parameter information;The process operation for needing to carry out advance and retreat knife locus interference inspection is clicked, batch is supported to choose; Corresponding class is created in inside to the process operation of each selection and stores corresponding process operation parameter information, process operation parameter Information include process operation serial number, process operation type, the geometric drive information of process operation, process operation balance information, The detailed advance and retreat knife knife rail information that advance and retreat knife macroelement and macroelement include, is finally stored in a manner of list in inside Record all process operation classes of acquisition;Generate the machining locus of process operation;The internal interface of CAM software is called, is obtained The knife rail information of process operation calculates corresponding cutter path and shows in face of engineering staff;According to engineering staff's interaction The modified knife rail of the parameter in-time generatin of modification;Engineering staff is macro to corresponding advance and retreat knife according to the machining locus quickly generated Parameter is replaced, is inserted into, deletes, and system senses corresponding Parameters variation, internal interface is called, immediately to process operation It modifies, recalculates the cutter location of operation advance and retreat knife, generate new into withdrawing track;
S3, cutter distortion compensation: it is analyzed using surface characteristics of the AutoCAD software to threedimensional model, passes through radius of curvature With nephanalysis finished surface each section feature of slope, mismachining tolerance is predicted, form one using to the biasing of error opposite direction A new finished surface, obtains machining code;
S4, the compensation of vision-based detection mismachining tolerance: numerical control machining center is processed according to the machining code that S2 is obtained, process In by the processing of Machine Vision Inspecting System real-time measurement numerically-controlled machine tool, obtain the collection of mismachining tolerance using Feedback Neural Network It closes, and establishes the compensation model of geometric error, then change G code and mismachining tolerance is compensated;
S5, mold carry out the processing of automobile moulding after processing is completed, according to injection mould processing method.
2. a kind of improvement technique of automobile moulding processing according to claim 1, which is characterized in that the S1 is specifically gone back Including the following contents: HyperMesh software repairs the part of threedimensional model by offset, trim function in the software It mends, completes mid-plane model.
3. a kind of improvement technique of automobile moulding processing according to claim 1, which is characterized in that the S2 is specifically wrapped Include following steps: to mould parts specificity analysis, machined parameters determination and the determination of tooling system;During prediction tool sharpening Cutting force, thus the horizontal-shift after cutter stress is analyzed with ANSYS predicts mismachining tolerance.
4. a kind of improvement technique of automobile moulding processing according to claim 1, which is characterized in that the automobile injection molding The machining accuracy of part is 0.004mm.
5. a kind of improvement technique of automobile moulding processing according to claim 2, which is characterized in that described The grid automatic majorization function of smooth, cleanup, equivalence of HyperMesh software, for optimizing the matter of grid Amount.
6. a kind of improvement technique of automobile moulding processing according to claim 1, which is characterized in that described for using When ANSYS, a new finished surface is formed using to the biasing of error opposite direction, during biasing, for prediction Error is constant value, and directly offset forms machined surface, and the error for prediction is not constant value, first finds out the error of key point, is biased Key point after biasing is linked to be a free form surface using CAD software, is programmed, is added using CAM software by key point Work code simultaneously imported into the processing that numerical control machining center is compensated offline.
CN201811479309.8A 2018-12-05 2018-12-05 A kind of improvement technique of automobile moulding processing Pending CN109676834A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111497104A (en) * 2020-04-20 2020-08-07 重庆鼎鼎科技有限公司 Injection molding part machining and forming method
CN117087054A (en) * 2023-09-05 2023-11-21 固安县方神机械有限公司 Soft capsule mold changing method and system

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CN106584031A (en) * 2016-12-20 2017-04-26 柳州通为机械有限公司 Manufacturing method of automobile box body part injection mold based on Moldflow
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US4922431A (en) * 1988-11-16 1990-05-01 Automation Intelligence, Inc. Method and apparatus of tool control in arbitrary plane operations
US5691909A (en) * 1995-12-29 1997-11-25 Western Atlas Method of virtual machining to predict the accuracy of part to be made with machine tools
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CN111497104A (en) * 2020-04-20 2020-08-07 重庆鼎鼎科技有限公司 Injection molding part machining and forming method
CN117087054A (en) * 2023-09-05 2023-11-21 固安县方神机械有限公司 Soft capsule mold changing method and system
CN117087054B (en) * 2023-09-05 2024-02-09 固安县方神机械有限公司 Soft capsule mold changing method and system

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Application publication date: 20190426