CN113059322A - Variable-thickness frame edge processing method - Google Patents
Variable-thickness frame edge processing method Download PDFInfo
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- CN113059322A CN113059322A CN202110331172.7A CN202110331172A CN113059322A CN 113059322 A CN113059322 A CN 113059322A CN 202110331172 A CN202110331172 A CN 202110331172A CN 113059322 A CN113059322 A CN 113059322A
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- 238000003672 processing method Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 68
- 230000008569 process Effects 0.000 claims abstract description 59
- 238000004519 manufacturing process Methods 0.000 claims abstract description 39
- 239000011265 semifinished product Substances 0.000 claims abstract description 18
- 239000000047 product Substances 0.000 claims abstract description 13
- 238000012545 processing Methods 0.000 claims abstract description 11
- 238000005452 bending Methods 0.000 claims abstract description 10
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 238000003754 machining Methods 0.000 claims abstract description 9
- 230000032683 aging Effects 0.000 claims abstract description 6
- 230000008595 infiltration Effects 0.000 claims abstract description 6
- 238000001764 infiltration Methods 0.000 claims abstract description 6
- 230000003647 oxidation Effects 0.000 claims abstract description 6
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 6
- 238000004381 surface treatment Methods 0.000 claims abstract description 6
- 238000007689 inspection Methods 0.000 claims description 10
- 238000010791 quenching Methods 0.000 claims description 10
- 230000000171 quenching effect Effects 0.000 claims description 10
- 238000000465 moulding Methods 0.000 claims description 8
- 238000013461 design Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000012937 correction Methods 0.000 claims description 5
- 230000007935 neutral effect Effects 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract 1
- 238000003801 milling Methods 0.000 description 10
- 230000035882 stress Effects 0.000 description 10
- 239000000126 substance Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 4
- 238000005057 refrigeration Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
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- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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 belongs to the field of tool manufacturing, and particularly relates to a variable-thickness frame edge processing method; firstly, adding process information including pin holes, positioning holes and the like on a product digifax to obtain a process digifax; designing a variable-thickness frame edge expansion digital model on the basis of the process digital model; manufacturing a three-dimensional expansion process digital model, a detection template and a shape template by using an expansion digital model; manufacturing a semi-finished product of the variable-thickness frame edge by using a machining mode according to a three-dimensional unfolding process digital model, and checking whether the semi-finished product of the variable-thickness frame edge is qualified or not according to a check template; designing a tool digifax by using a process digifax, and manufacturing a variable-thickness frame edge bending forming tool by using the tool digifax; using the appearance sample plate to correct the quenched variable-thickness frame edge; and performing subsequent thermal surface treatment such as artificial aging, infiltration, oxidation and the like to obtain qualified parts. The invention can effectively accelerate the production period and greatly reduce the part scrap caused by the defects of the processing technology.
Description
Technical Field
The invention belongs to the field of tool manufacturing, and particularly relates to a variable-thickness frame edge processing method.
Background
Variable thickness parts are widely used in the aerospace field. The variable thickness frame to which the present invention is applied is also a typical example. The thickness of the middle section of the frame edge is the thickest, and the thickness of the two ends of the part needs to be changed for many times, and the material of the part is 7075-0. The conventional processing method is chemical milling, and the process comprises the steps that a process unit designs and manufactures an expansion sample plate, an appearance sample plate and a forming tool according to a part digital model or drawing; the production unit carries out blanking according to the unfolding sample plate; then, carrying out chemical milling on the area with the thickness needing to be changed; bending and molding by using a molding tool; quenching treatment is carried out to eliminate stress; and (4) using the shape template for shape correction, and performing subsequent thermal surface treatment such as artificial aging, infiltration, oxidation and the like to obtain the part.
The problems existing in the conventional chemical milling process adopted at present are as follows:
1. the variable thickness frame has a missing etching defect when chemical milling is performed in batch, which results in scrapping of parts.
2.7075-0 material internal structure is inhomogeneous under 0 state, and stress is unbalanced, and chemical milling process has aggravated material internal stress unbalance, makes the part warp more violent in the quenching process, and the school shape degree of difficulty increases.
3. The chemical milling waste liquid in the chemical milling sample plate processing mode is polluted greatly and is not beneficial to environmental protection.
Disclosure of Invention
1. Solves the technical problem
The invention provides a variable-thickness frame edge processing method. The scrapping of parts caused by the chemical milling machining missing corrosion defect can be effectively reduced; the internal stress is increased due to the processing, and the problem of material deformation in the quenching process is aggravated; the manufacturing period of the parts can be effectively shortened.
2. Technical scheme
The invention provides a variable-thickness frame edge processing method, which comprises the following steps:
step S1, designing and manufacturing a three-dimensional unfolding process digital model containing process information, an inspection template and an appearance template according to the variable-thickness frame edge inspection part product digital model;
step S2, directly processing a variable-thickness frame edge semi-finished product by using a machining mode according to a three-dimensional unfolding process digifax;
step S3, designing a tool digital model according to the process digital model, wherein the tool digital model is provided with process information;
step S4, manufacturing a forming tool of the variable-thickness frame edge by using a tool digital model, and engraving process information corresponding to the tool digital model on the forming tool;
step S5, bending and molding the semi-finished product of the variable-thickness frame edge by using a molding tool to obtain the variable-thickness frame edge without heat treatment;
step S6, using the shape template to correct the shape of the variable thickness frame after heat treatment, so that the variable thickness frame is attached to the shape line of the shape template;
and step S7, performing subsequent heat meter treatment on the deformed frame edge subjected to shape correction to obtain the finally qualified deformed frame edge part.
Preferably, the variable-thickness frame edge semi-finished product in the step S2 is machined by a numerically-controlled machine tool, and the machining mode has higher precision, so that the part scrappage caused by chemical milling machining and corrosion leakage defect of the part can be effectively reduced, and the problem of stress deformation in manufacturing is reduced.
Preferably, the steps S2, S3 may be performed in parallel after the completion of the step S1 to further reduce the manufacturing cycle.
Preferably, in the step S4, the forming tool is processed with process information corresponding to the tool digital model; the forming detection of the bending forming of the semi-finished product is more visual and accurate.
Preferably, after step S5 is completed, the non-heat-treated variable thickness frame is heat-treated to relieve stress; the heat treatment may be a quenching treatment to relieve stress.
Preferably, in step S7, the subsequent thermal surface treatment at least includes artificial aging, infiltration, and oxidation. And stress is eliminated, so that the surface quality of the part meets the design requirement.
Preferably, the step S1 is further implemented as follows:
the first step is as follows: measuring the thickness of each thickness layer of the variable thickness frame, and calculating the expansion value of each thickness layer based on the thickness values of the neutral layers of different thickness layers and the corresponding bending radius;
the second step is that: and opening a part product digital analog in the CATIA, and extracting an expansion digital analog of the maximum thickness layer, a shape cross line and a shape cross line of each thickness layer. And shifting the external crossed lines of the thickness layers by corresponding expansion values on the expansion digital model with the maximum thickness to obtain the expansion external lines of the thickness layers, and manufacturing the three-dimensional expansion digital model.
The third step: and designing and generating a three-dimensional entity digifax in the CATIA part design module, and adding process information including pin holes, positioning holes and the like required by production on the three-dimensional entity digifax to obtain a three-dimensional expansion process digifax.
The fourth step: manufacturing a detection sample plate according to the maximum thickness layer expansion contour line, the pin hole, the positioning hole and the like, wherein the detection sample plate is carved with each thickness layer expansion contour line; and manufacturing the appearance sample plate according to the appearance cross line, the pin hole, the positioning hole and the like of the maximum thickness layer.
The fifth step: and manufacturing a process digifax containing process information such as pin holes, positioning holes, part outline lines and the like according to the product digifax.
3. Advantageous effects
The invention provides a variable-thickness frame edge processing method. The variable-thickness frame edge semi-finished product is processed by using a mechanical cutting processing process mode, so that the production period can be effectively shortened, and the part scrap caused by the defects of the processing process is greatly reduced. Meanwhile, the deformation degree in the quenching process caused by stress generated in the chemical milling mode can be effectively reduced. The pollution harm to the environment is greatly reduced. The processing method provided by the invention uses digital design and manufacturing, and middle part links are processed in parallel, so that the manufacturing period can be greatly shortened.
Drawings
The invention comprises 3 figures, which are described as follows:
FIG. 1 is a variable thickness rim part;
FIG. 2 is a three-dimensional unfolding template for variable thickness rims;
fig. 3 is a variable thickness rim inspection template.
Detailed Description
The processing method provided by the invention is described in detail in the following with reference to the attached drawings,
the processing method provided by the invention comprises the steps of designing and manufacturing a three-dimensional expansion process digital model containing process information, an inspection sample plate and a shape sample plate according to a variable-thickness frame edge inspection part product digital model; the specific design and manufacturing process is that at least process information including pin holes, positioning holes and the like is added to a product digifax to obtain a process digifax; designing a variable-thickness frame edge expansion digital model on the basis of the process digital model; manufacturing a three-dimensional expansion process digital model, a detection template and a shape template by using an expansion digital model; manufacturing a semi-finished product of the variable-thickness frame edge by using a machining mode according to a three-dimensional unfolding process digital model, and checking whether the semi-finished product of the variable-thickness frame edge is qualified or not according to a check template; designing a tool digifax by using a process digifax, and manufacturing a variable-thickness frame edge bending forming tool by using the tool digifax; using the appearance sample plate to correct the quenched variable-thickness frame edge; performing subsequent thermal surface treatment such as artificial aging, infiltration, oxidation and the like to obtain qualified parts; the specific implementation process comprises the following steps:
(1) according to the variable-thickness frame edge inspection part product digital-analog design shown in figure 1, a three-dimensional expansion process digital-analog, an inspection sample plate, an appearance sample plate and a process digital-analog are manufactured.
The first step is as follows: measuring the thickness of each thickness layer of the variable thickness frame, and calculating the expansion value of each thickness layer based on the thickness values of the neutral layers of different thickness layers and the corresponding bending radius;
the second step is that: and opening a part product digital model in the CATIA, and extracting an expansion digital model of the maximum thickness layer and appearance crossed lines of each thickness layer. And shifting the external crossed lines of the thickness layers by corresponding expansion values on the expansion digital model of the maximum thickness layer to obtain the expansion external lines of the thickness layers, and manufacturing the three-dimensional expansion digital model. The reason for selecting the maximum thickness layer is that the expansion value of each thickness layer is included in the maximum thickness layer expansion numerical model, the shape cross lines of all the thickness layers can be extracted at one time, and the expansion shape lines of the corresponding thickness layers can be obtained only by offsetting the corresponding thickness layer expansion numerical value subsequently. The method has the advantages of one-time extraction, effective reduction of similar steps, avoidance of errors caused by operation and improvement of efficiency.
The third step: a three-dimensional entity digital analog is designed and generated in the CATIA part design module, required process information including pin holes, positioning holes and the like is manufactured on the three-dimensional entity digital analog to obtain a three-dimensional expansion process digital analog, and the figure 2 shows. The three-dimensional expansion digital model is used for machining the variable-thickness frame edge semi-finished product.
The fourth step: and manufacturing a detection sample plate according to the maximum thickness layer expansion contour line, the pin hole, the positioning hole and the like, wherein the detection sample plate is shown in figure 3, and the expansion contour lines of all the thickness layers are carved on the detection sample plate. The inspection template is used for inspecting whether the semi-finished product of the variable-thickness frame edge manufactured by the numerical control machining unit is qualified or not. And manufacturing the appearance sample plate according to the appearance cross line, the pin hole, the positioning hole and the like of the maximum thickness layer. The shape template is used for correcting the shape of the quenched variable-thickness frame edge.
The fifth step: and manufacturing a process digifax containing process information such as pin holes, positioning holes, part outline lines and the like according to the product digifax.
(2) And manufacturing the variable-thickness frame edge semi-finished product by using a numerical control machine according to a three-dimensional expansion process digital model, checking whether the variable-thickness frame edge semi-finished product is correct according to the check template, and checking whether the variable-thickness frame edge semi-finished product is correct according to the check template.
(3) And designing a tool digifax by using the process digifax, wherein the tool digifax is provided with process information such as pin holes, positioning holes, part outline lines and the like.
(4) And manufacturing the forming tool of the variable-thickness frame edge according to the tool digital model. And processing process information such as pin holes, positioning holes, part outline lines and the like on the forming tool.
(5) And bending and molding the variable-thickness frame edge semi-finished product by using a molding tool to obtain the non-heat-treated variable-thickness frame edge.
(6) And quenching the non-heat-treated variable-thickness frame edge to eliminate stress.
(7) And (5) correcting the edges of the variable-thickness frames subjected to heat treatment by using the shape template, so that the edges are attached to the shape of the shape template, and inspecting to be qualified. And when the shape correction can not be completed within 30min after quenching, the part must be put into a refrigeration house, the maximum delay time between the quenching treatment and the refrigeration of the part must not exceed 30min, and the part is stored for 7 days at the temperature of-18 ℃ in the refrigeration house for the longest time. The shape correction must be completed within 30 minutes after the quenching treatment or within 30 minutes after the cold storage is taken out.
(8) And carrying out subsequent thermal surface treatment such as artificial aging, infiltration, oxidation and the like on the corrected variable-thickness frame edge to obtain the finally qualified variable-thickness frame edge part.
While specific embodiments of the present invention have been described above, it should be noted that the above embodiments are not all routine techniques in the art; the invention is not limited to the specific embodiments described above, wherein equipment and structures not described in detail are understood to be practiced in a manner common in the art; those skilled in the art can make various changes or modifications within the scope of the claims to make various simple deductions, changes or substitutions, such as the cutting parameters listed in the specification, and can slightly deviate in practical implementation without departing from the essence of the invention; such modifications are to be considered as falling within the scope of the present invention.
Claims (9)
1. A variable thickness frame edge processing method is characterized by comprising the following steps:
step S1, designing and manufacturing a three-dimensional unfolding process digital model containing process information, an inspection template and an appearance template according to the variable-thickness frame edge inspection part product digital model;
step S2, directly processing a variable-thickness frame edge semi-finished product by using a machining mode according to a three-dimensional unfolding process digifax;
step S3, designing a tool digital model according to the process digital model, wherein the tool digital model is provided with process information;
step S4, manufacturing a forming tool of the variable-thickness frame edge by using a tool digital model, and engraving process information corresponding to the tool digital model on the forming tool;
step S5, bending and molding the semi-finished product of the variable-thickness frame edge by using a molding tool to obtain the variable-thickness frame edge without heat treatment;
step S6, using the shape template to correct the shape of the variable thickness frame after heat treatment, so that the variable thickness frame is attached to the shape line of the shape template;
and step S7, performing subsequent heat meter treatment on the deformed frame edge subjected to shape correction to obtain the finally qualified deformed frame edge part.
2. The method for processing a variable-thickness frame edge according to claim 1, wherein in step S1, at least process information including the pin holes and the positioning holes is added to the product digifax to obtain a process digifax; designing a variable-thickness frame edge expansion digital model on the basis of the process digital model; and manufacturing a three-dimensional expansion process digital model, a check template and a shape template by using the expansion digital model.
3. The variable-thickness frame edge processing method according to claim 1 or 2, wherein step S1 is implemented as follows:
the first step is as follows: measuring the thickness of each thickness layer of the variable thickness frame, and calculating the expansion value of each thickness layer based on the thickness values of the neutral layers of different thickness layers and the corresponding bending radius;
the second step is that: opening a part product digital analog in the CATIA, and extracting an expansion digital analog of a maximum thickness layer, a shape cross line and a shape cross line of each thickness layer; shifting the external crossed lines of all the thickness layers by corresponding expansion values on the expansion digital model with the maximum thickness to obtain the expansion external lines of all the thickness layers, and manufacturing a three-dimensional expansion digital model;
the third step: designing and generating a three-dimensional entity digital analog in a CATIA part design module, and adding process information including pin holes and positioning holes required by production on the three-dimensional entity digital analog to obtain a three-dimensional expansion process digital analog;
the fourth step: manufacturing a detection sample plate according to the maximum thickness layer expansion contour line, the pin hole and the positioning hole, wherein the detection sample plate is carved with each thickness layer expansion contour line; manufacturing an appearance sample plate according to the appearance cross line, the pin hole and the positioning hole of the maximum thickness layer;
the fifth step: and manufacturing a process digifax containing the pin hole, the positioning hole and the part outline process information according to the product digifax.
4. The method of claim 1, wherein the semi-finished product of the variable thickness rim in step S2 is machined by a numerical control machine.
5. The method of processing a variable thickness rim as claimed in claim 1, wherein the steps S2, S3 are performed in parallel after completion of the step S1.
6. The method of claim 1, wherein the forming tool processes process information corresponding to a tool model in step S4.
7. The method of claim 1, wherein the bent and formed variable thickness rim is heat-treated in step 5.
8. The method of processing a variable thickness rim according to claim 7, wherein the heat treatment is a quenching treatment.
9. The method of claim 1, wherein the step S7, the subsequent thermal surface treatment includes at least artificial aging, infiltration, and oxidation.
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Application publication date: 20210702 |