CN119427229A - A shot peening correction method for chordal shape deviation of wall panel parts - Google Patents
A shot peening correction method for chordal shape deviation of wall panel parts Download PDFInfo
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- CN119427229A CN119427229A CN202411634252.XA CN202411634252A CN119427229A CN 119427229 A CN119427229 A CN 119427229A CN 202411634252 A CN202411634252 A CN 202411634252A CN 119427229 A CN119427229 A CN 119427229A
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- wallboard
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
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Abstract
The invention belongs to the technical field of shot blasting forming, and discloses a shot blasting correction method for the chord-wise shape out-of-tolerance of wallboard parts, which comprises the following steps of dividing a wallboard thickness area; measuring out-of-tolerance data, drawing a wallboard appearance out-of-tolerance chart, determining a shot blasting correction area according to the out-of-tolerance degree, determining shot blasting correction machine tool parameters according to the thickness of the wallboard and the out-of-tolerance data, protecting a non-shot blasting area of a part before shot blasting, and performing shot blasting correction on the machine tool. The technical problems of low efficiency, low accuracy, dependence on manual experience and the like of the existing shape correction mode are solved. The invention realizes accurate identification and correction of the chord-wise outline deviation of the wallboard.
Description
Technical Field
The invention belongs to the technical field of shot blasting forming, and particularly relates to a shot blasting correction method for a wall plate part with a chord direction shape out of tolerance.
Background
The quality of manufacture of wing panels as an important component of an aircraft structure is directly related to the safety performance and the flight life of the aircraft. Shot blasting forming is used as an advanced special technique for processing aircraft sheet metal, and plays a key role in manufacturing wing wallboard. The technology carries out accurate impact on the metal surface through the tiny shot sprayed at high speed, and induces the plastic deformation of the material surface layer, thereby realizing the accurate forming of complex shapes, and simultaneously enhancing the strength and the fatigue life of the material.
However, the complexity of shot peening technology is not negligible, and its key is how to precisely control a series of interrelated process parameters to ensure stability of the shaping process and accuracy of the results. These parameters include, but are not limited to, shot pressure, shot size, shot angle, and shot velocity. The selection and regulation of these parameters not only requires extremely high technical precision, but also takes into account various factors such as material properties, structural characteristics of the wall panels and final forming requirements, any minor deviation may have a significant impact on the forming precision.
In practice, due to the interplay and constraints between these process parameters, it is often necessary to determine the optimal combination of parameters through extensive experimentation and optimization. However, even so, it is still difficult to completely avoid the problem of forming defects such as out-of-tolerance in chordwise profile of the panel due to improper parameter setting. In general, aiming at the problem of out-of-tolerance appearance of the wallboard, the manual experience is mainly relied on to test and correct the wallboard for multiple times, so that the efficiency is low, the cost is high, and the consistency of forming quality is difficult to ensure. In addition, due to inaccuracy of correction, manual correction by workers is also required, which not only puts high demands on the skill level of the workers, but also further increases manufacturing costs and uncertainty.
To overcome these limitations, there is a need for a more accurate and efficient method of calibrating to achieve accurate identification and correction of wall panel chordwise camber. Based on the urgent need, the invention provides a reliable parameter selection method for the problem of out-of-tolerance of the chord-wise appearance of the wallboard, improves the stability and the precision of the correction result, is also beneficial to reducing the manufacturing cost, improving the production efficiency, and promoting the further development and the wide application of the shot blasting forming technology.
Disclosure of Invention
The shot blasting correction method for the wall plate type part chord direction outline overstep aims to solve the technical problems that an existing correction mode is low in efficiency and accuracy, relies on manual experience and the like, and achieves accurate identification and correction of the wall plate chord direction outline overstep.
In order to achieve the above purpose, the technical scheme adopted by the application is as follows:
a shot blasting correction method for the chord direction shape out of tolerance of wallboard parts comprises the following steps:
step 1, dividing a thickness area of a wallboard;
Step 2: measuring out-of-tolerance data and drawing a wallboard appearance out-of-tolerance chart;
step 3, determining a shot blasting correction area according to the out-of-tolerance degree;
step 4, determining shot blasting correction machine tool parameters according to the thickness of the wallboard and the out-of-tolerance data;
Step 5, protecting the non-shot blasting area of the part before shot blasting;
And 6, shot blasting and shape correction of the machine tool.
According to the further scheme, the step 1 specifically comprises the step of dividing the wing wallboard into a thickness area smaller than 2mm, a thickness area 2-5 mm and a thickness area larger than 5mm according to the thickness by performing geometric analysis on the wing wallboard.
The method comprises the following step 2, namely placing wing wallboard with out-of-tolerance chord-wise appearance after shot blasting forming on a tooling type frame, respectively recording the maximum value of the clearance between the wallboard and a template at the boundary of each rib and the position of a bonding area, and drawing an out-of-tolerance chart, wherein the chord-wise template is arranged at each rib position on the tooling type frame, and the appearance of the chord-wise template is bonded with the theoretical chord-wise appearance of the wallboard.
The method comprises the following step 3, namely determining the length range of the out-of-tolerance of the appearance of the wallboard through a tooling type frame, namely shot blasting correction length range, wherein the width range is the whole wallboard width, and the edge subsidence area of the wallboard, which is different from the thickness of the surrounding web plate by more than 2mm, is not included.
In step 4, selecting a projectile medium according to the maximum value of the exceeding difference between the thickness of the wall plate and the clearance of the profile, wherein the projectile medium comprises the following concrete steps:
When the thickness of the wallboard is greater than 5mm, large-sized shots (the type of correction shot is consistent with the type of chordwise shot forming) may be used;
When the thickness of the wallboard is between 2 and 5mm, the shot medium is determined according to the thickness profile gap out-of-tolerance maximum value of the wallboard, when the gap out-of-tolerance maximum value is larger than 5cm, large-size shots (the type of the shot is consistent with the type of the chordwise shot blasting forming) can be used, when the gap out-of-tolerance maximum value is larger than 2cm and smaller than 5cm, small-size shots (the type of the shot is consistent with the type of the chordwise shot blasting forming) can be used, and when the gap out-of-tolerance maximum value is smaller than 2cm, an ultrasonic wave shape corrector is used for carrying out manual shot blasting shape correction;
When the thickness of the wallboard is smaller than 2mm, the rotary vane is used for manual shot blasting shaping, and the rotation speed of the rotary vane is generally 5000-6500 r/min.
As a further scheme of the invention, the large-size shot peening pressure is generally 0.6-0.9 times of the chordwise peening forming pressure, the small-size shot peening pressure is generally 1-1.5 times of the chordwise peening forming pressure, and the machine peening speed is 6-10 m/min.
The method is characterized in that the step 5 specifically comprises the steps of protecting the edges of the wall plate without ribs, a thin web area with the thickness smaller than 2mm and a web sinking area with the thickness more than 2mm different from the surrounding web, and protecting the top of the vertical rib for the wall plate with ribs, wherein the rib root R area, the web sinking area, the edges and other areas are required to be protected.
The method comprises the following step 6, namely hanging and clamping the wallboard on a machine tool fixture, leading the front Liang Chaoshang and the back beam of the part to face downwards, taking care of clamping the ribbed wallboard in a free state while keeping the ribs horizontal, applying no prestressing force, and carrying out reverse shot blasting correction on the correction area by adopting preset shot blasting parameters.
Compared with the prior art, the application has the beneficial effects that:
1. according to the invention, by controlling shot blasting correction parameters more accurately, accurate correction of the chord-wise appearance of the wallboard is realized, reworking and scrapping caused by insufficient forming precision are reduced, and further the production cost is reduced.
2. The traditional method often depends on empirical adjustment and multiple trial and error, and has high requirement on experience of operators. The invention reduces the dependence on manual experience, reduces production delay and cost increase caused by insufficient experience, and improves the stability and reliability of the production process.
3. According to the invention, through accurately identifying the exceeding degree of the wallboard and controlling the shot blasting correction parameters, the repeated trial and error process caused by improper selection of the correction parameters is reduced, so that the production period is shortened, and the production efficiency is improved.
4. In summary, the invention has the advantages of improving production efficiency, improving forming precision, reducing dependence on manual experience and the like, and compared with the prior art, the invention obviously reduces manufacturing cost. These advantages make the invention have wide application prospect and market competitiveness in the aerospace manufacturing industry.
The application will be further described with reference to the drawings and examples.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention.
In the drawings:
FIG. 1 is a schematic view of thickness partitioning of a wall plate part according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a wall plate part and a tooling frame according to an embodiment of the present invention;
Fig. 3 is a schematic diagram of a chord-wise outer shape of a wallboard part according to an embodiment of the present invention.
The numbers in the figures show that the chord-wise template is 1, the chord-wise profile is 2 and the template is attached to the wallboard after shot blasting, and the chord-wise profile is 3 and the wallboard is out of tolerance after shot blasting.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by those skilled in the art without making any inventive effort based on the embodiments of the present invention are within the scope of protection of the present invention.
The invention aims to provide a shot blasting correction method for the chord-wise shape out-of-tolerance of wallboard parts, which can solve the problem that delivery is affected by the chord-wise shape out-of-tolerance after forming due to improper shot blasting parameter selection of wallboard parts.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
In the embodiment of the application, a certain wallboard part is taken as an example, and the thickness of the whole part is changed within the range of 1-8 mm. As shown in FIG. 1, the specific steps are as follows.
Step 1, dividing the thickness area of the wallboard.
And performing geometric analysis on the wing wallboard, and dividing the wallboard into a thickness area smaller than 2mm, a thickness area of 2-5 mm and a thickness area larger than 5mm according to the thickness. As shown in table 1.
Table 1 wall thickness partition (Unit: mm)
| Rib position | 0~17 | 17~20 | 20~22 | 22~28 |
| Thickness of (L) | Greater than 5 | 2~5 | Greater than 5 | Less than 2 |
Step 2, measuring out-of-tolerance data, and drawing a wall plate appearance out-of-tolerance chart.
And placing the wall plate with the out-of-tolerance profile of the wall plate after shot blasting forming on a tooling type frame, wherein chord direction templates are arranged at each rib position on the tooling type frame, and the profile of the wall plate is attached to the theoretical chord direction profile of the wall plate as shown in figure 2. And respectively recording the maximum value of the gap between the wall plate and the template at the boundary of the profile of each rib and the position of the attaching region, and drawing an outline out-of-tolerance chart.
Table 2 wall chord outline super-tolerance chart (unit: cm)
And step 3, determining a shot blasting correction area according to the out-of-tolerance degree.
The shot-peening correction surface is the inner surface of the wing wallboard, and for the area with the thickness of the wallboard being less than 2mm, a machine tool is not used for shot-peening correction. The shot peen shape is determined according to thickness and ranges from 0 rib to 22 ribs in length and the width ranges from the whole panel width, and panel edge subsidence areas which are different from the surrounding web thickness by more than 2mm are not included.
And 4, determining parameters of the shot blasting correction machine tool according to the thickness of the wallboard and the out-of-tolerance data.
The selection of the shot medium can be determined according to the maximum value of the wall thickness and the shape clearance exceeding difference, ASH460 shots are used for shot blasting forming in the area with the wall thickness being larger than 5mm, namely 0 ribs to 17 ribs and 20 ribs to 22 ribs, the shot medium is determined according to the maximum value of the shape clearance exceeding difference of the wall thickness in the area with the wall thickness being 2 to 5mm, the maximum value of the shape clearance exceeding difference of the wall 17 to 20 ribs is larger than 2cm and smaller than 5cm, and ASH230 shots are used. In the area with the thickness of the wallboard less than 2mm, manual shot blasting shaping is carried out by using a rotary vane, and the shot blasting rotating speed of the rotary vane is selected to be 5000r/min.
ASH460 shot peening pressure is selected to be 0.8 times of chord direction shot peening pressure, namely 0-17 rib peening pressure is 0.12MPa, 20-22 rib peening pressure is 0.16MPa, ASH230 shot peening pressure is selected to be 1.2 times of chord direction peening pressure, namely 17-20 rib peening pressure is 0.16MPa.
The machine speed was chosen to be 6m/min.
And 5, protecting the non-shot blasting area of the part before shot blasting.
For the wall plate without ribs, the edges of the wall plate, the thin web area with the thickness smaller than 2mm and the web sinking area with the thickness different from the surrounding web by more than 2mm are required to be protected, and for the wall plate with ribs, the top of the vertical ribs, the R area of the ribs, the web sinking area, the edges and other areas are required to be protected.
And 6, shot blasting and shape correction of the machine tool.
And (3) hanging and clamping the wallboard onto a machine tool fixture, wherein the front Liang Chaoshang and the back beam of the part face downwards, the ribbed wallboard is noted to keep the ribs horizontal, the wallboard is clamped in a free state, no prestress is applied, and the reverse shot blasting correction is carried out on the correction area by adopting the set shot blasting parameters.
The object of the present invention has been accomplished.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (8)
1. A shot blasting correction method for the chord direction shape out of tolerance of wallboard parts is characterized by comprising the following steps:
step 1, dividing a thickness area of a wallboard;
Step 2: measuring out-of-tolerance data and drawing a wallboard appearance out-of-tolerance chart;
step 3, determining a shot blasting correction area according to the out-of-tolerance degree;
step 4, determining shot blasting correction machine tool parameters according to the thickness of the wallboard and the out-of-tolerance data;
Step 5, protecting the non-shot blasting area of the part before shot blasting;
And 6, shot blasting and shape correction of the machine tool.
2. The shot peening correction method for the chord-wise outer shape out of tolerance of the wallboard part according to claim 1 is characterized in that the wallboard is divided into a thickness zone smaller than 2mm, a thickness zone 2-5 mm and a thickness zone larger than 5mm by geometric analysis of the wing wallboard in step 1.
3. The shot blasting correction method for the chord-wise outline overstep of the wallboard part is characterized in that step 2 is characterized in that a wing wallboard with the chord-wise outline overstep after shot blasting is placed on a tool type frame, the maximum value of the clearance between the wallboard and a template at the outline boundary of each rib position and the position of a fitting area are recorded respectively, an outline overstep chart is drawn, and the chord-wise template is arranged at each rib position on the tool type frame, and the outline of the chord-wise template is fitted with the theoretical chord-wise outline of the wallboard.
4. The method for shot peening and sizing the chord direction shape exceeding of the wallboard part according to claim 1, wherein the step 3 is characterized in that a length range of the wall plate shape exceeding is determined through a tool type frame, namely the shot peening and sizing length range, the width range is the whole width of the wallboard, and a wallboard edge sinking area which is different from the surrounding web thickness by more than 2mm is not included.
5. A method for correcting the chord-wise out-of-tolerance shot blast of a wallboard-like part according to claim 3, wherein in step 4, shot media are selected according to the maximum value of the out-of-tolerance of the thickness of the wallboard and the out-of-tolerance of the profile, specifically:
when the thickness of the wall plate is greater than 5mm, large-size pellets can be used;
When the thickness of the wallboard is between 2cm and 5mm, the shot medium is determined according to the thickness profile gap out-of-tolerance maximum value of the wallboard, when the gap out-of-tolerance maximum value is larger than 5cm, large-size shots can be used, when the gap out-of-tolerance maximum value is larger than 2cm and smaller than 5cm, small-size shots can be used, and when the gap out-of-tolerance maximum value is smaller than 2cm, an ultrasonic shaping machine is used for carrying out manual shot blasting shaping;
When the thickness of the wallboard is smaller than 2mm, the rotary vane is used for manual shot blasting shaping, and the rotation speed of the rotary vane is generally 5000-6500 r/min.
6. The method for correcting the shape of the wall plate part by shot blasting with the chord direction out of tolerance according to claim 5, wherein the shot blasting pressure of the large-size shot is generally 0.6-0.9 times of the forming pressure of the chord direction shot blasting, the shot blasting pressure of the small-size shot is generally 1-1.5 times of the forming pressure of the chord direction shot blasting, and the shot blasting speed of a machine tool is 6-10 m/min.
7. The method for shot peening correction of the chord wise outer shape of the wallboard part, which is disclosed in claim 1, is characterized in that the step 5 is specifically that for the wallboard without ribs, the edge of the wallboard needs to be protected, the thin web area with the thickness smaller than 2mm, and the web sinking area with the thickness more than 2mm different from the surrounding web, and for the wallboard with ribs, the top of the stud needs to be protected, the R area of the rib root, the web sinking area, the edge and other areas.
8. The method for shot peening and shape correction of the chord direction shape out of tolerance of the wallboard part according to claim 1, wherein the step 6 is characterized in that the wallboard is hung and clamped on a machine tool fixture, the front Liang Chaoshang of the part is arranged on the back beam, the ribbed wallboard is noted to be kept horizontal, the wallboard is clamped in a free state, no prestress is applied, and the shape correction area is subjected to reverse shot peening and shape correction by adopting set shot peening parameters.
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| CN202411634252.XA CN119427229A (en) | 2024-11-15 | 2024-11-15 | A shot peening correction method for chordal shape deviation of wall panel parts |
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