CN115283937A - Thin-wall annular sheet metal part assembling device and method - Google Patents
Thin-wall annular sheet metal part assembling device and method Download PDFInfo
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- CN115283937A CN115283937A CN202210864644.XA CN202210864644A CN115283937A CN 115283937 A CN115283937 A CN 115283937A CN 202210864644 A CN202210864644 A CN 202210864644A CN 115283937 A CN115283937 A CN 115283937A
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- 239000002184 metal Substances 0.000 title claims abstract description 136
- 238000000034 method Methods 0.000 title claims abstract description 56
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- 238000010030 laminating Methods 0.000 claims abstract description 6
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 4
- 238000000429 assembly Methods 0.000 claims abstract description 3
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 15
- 235000011089 carbon dioxide Nutrition 0.000 claims description 15
- 238000003825 pressing Methods 0.000 claims description 15
- 238000004364 calculation method Methods 0.000 claims description 13
- 238000012360 testing method Methods 0.000 claims description 10
- 238000010009 beating Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
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- 230000002159 abnormal effect Effects 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
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
- B23P11/02—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits
- B23P11/025—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits by using heat or cold
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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
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/01—Aircraft parts
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Abstract
The application provides an assembly quality and a method of thin-wall annular sheet metal parts, which belong to the technical field of aviation manufacturing assembly, and the assembly quality of the thin-wall annular sheet metal parts comprises the following steps: the mould is matched with the sheet metal part which shrinks in a low-temperature environment, a plurality of positioning bolts which slide along the radial direction are arranged on the mould, and different positioning bolts can be simultaneously inserted into different sheet metal holes; a base on which the part is placed; the clamp assemblies are fixed on the base and distributed on the periphery of the part, and are used for stabilizing the position of the part on the base; be equipped with the aiming axis on the base, be equipped with first guide plane on the aiming axis, be equipped with the dabber hole on the mould, dabber hole inner wall butt the lateral wall of aiming axis, just be equipped with the second guide plane with the laminating of first guide plane on the dabber hole. According to the scheme, the deformation of the sheet metal part in the assembling process is reduced, and meanwhile the requirement on the assembly angle direction is met.
Description
Technical Field
The application relates to the field of aviation manufacturing and assembling, in particular to a thin-wall annular sheet metal part assembling device and method.
Background
The technical requirements for assembly of the aircraft engine at the present stage are higher and higher, the assembly difficulty is increased, an operator with high skill level cannot necessarily finish the assembly by a traditional manual assembly mode, more innovative technologies are required for assembly of the aircraft engine, the problem cannot be solved only by a traditional knocking method, a hot-fitting method and a cold-fitting method, a diffuser shell assembly needs to be assembled with a large-diameter sheet metal part in an interference fit mode, the assembly has an angular requirement, the assembly difficulty is high, meanwhile, the base material of the part is high-temperature alloy, the cooling speed is high, the traditional assembly method cannot meet the assembly requirement, and the following defects exist: the roundness of the sheet metal part is large and the sheet metal part is of a special-shaped structure, the stress deformation of the sheet metal part is large and irregular in the assembling process, and the deformation cannot be controlled; the assembly interference magnitude is large, the part shrinkage recovery time is short, and clamping stagnation can occur once the sheet metal part is inclined in the assembly process; the sheet metal hole and the base part have angular requirements in the assembling process, the angular direction of the traditional assembling method cannot be controlled, and the assembling efficiency and the success rate are low. An automatic assembly scheme of an assembly machine is adopted by external automatic manufacturers in the fields of automobiles and the like, but the automatic assembly technology of the assembly machine is not successfully applied to the batch production of aviation parts because the aviation parts have higher precision requirement and complex molded surfaces.
Disclosure of Invention
In view of this, the application provides an assembling device and method for a thin-wall annular sheet metal part, which solve the problems in the prior art, reduce deformation of the sheet metal part in the assembling process and meet the requirement on the assembling angle direction.
On the one hand, the application provides a thin wall annular sheet metal component assembly quality adopts following technical scheme:
the utility model provides a thin wall annular sheet metal component assembly quality, be equipped with a plurality of evenly distributed's sheet metal hole on the sheet metal component circumference lateral wall, the sheet metal component assembles in annular part, the part outer wall is equipped with along radial convex boss, thin wall annular sheet metal component assembly quality includes:
the outer side surface of the die is matched with the inner side surface of the sheet metal part contracted in the low-temperature environment, a plurality of positioning bolts sliding along the radial direction are arranged on the die, and different positioning bolts can be simultaneously inserted into different sheet metal holes;
a base on which the part is placed;
the clamp assemblies are fixed on the base and distributed on the periphery of the part, and are used for stabilizing the position of the part on the base;
wherein, be equipped with on the base with behind the fixed position the coaxial guiding shaft of part, be equipped with first guide plane on the guiding shaft, be equipped with the confession on the mould the dabber hole that the guiding shaft passed, the center of dabber hole with the axle center coincidence of mould, dabber hole inner wall butt the lateral wall of guiding shaft, just be equipped with the second guide plane with the laminating of first guide plane on the dabber hole.
Optionally, the diameter shrinkage of the sheet metal part in a low-temperature environment is 0.3-0.38mm.
Optionally, the number of the sheet metal holes is even, when the sheet metal part and the part are correctly assembled, an included angle between the boss and one of the sheet metal holes is α, an included angle between a straight line perpendicular to the first guide plane and passing through the axis of the guide shaft and the boss axis of the part after being fixed is α, and an axis direction of any one of the pins is perpendicular to the second guide plane.
Optionally, the fixture assembly includes a plurality of pressing blocks distributed on the base, and when the pressing blocks are fixed on the base through bolts, the pressing blocks press the process outer ring on the outer edge of the part on the base.
Optionally, the fixture assembly comprises a circumferential positioning block fixed on the base, the part rotates on the base in the circumferential direction until the boss abuts against the circumferential positioning block, and the angle between the straight line perpendicular to the first guide plane and passing through the guide shaft axis and the included angle between the boss axis is alpha.
Optionally, a through hole for the mandrel to pass through is formed in the die, a rectangular frame is fixed on the die, the center of the rectangular frame coincides with the axis of the die, the inner wall of the rectangular frame forms the inner hole, the rectangular frame comprises a three-side frame with an opening on one side and a guide strip with a closed opening, and the inner wall of the guide strip forms the second guide plane.
Optionally, one side back to the base on the guiding shaft is equipped with the screw rod, thin wall annular sheet metal component assembly quality still includes the application of force subassembly, the application of force subassembly is including encircleing switching sleeve and the nut in the dabber outside, nut and the coaxial setting of switching sleeve, the nut with screw rod threaded connection rotates the nut drives switching sleeve's terminal surface laminating and compressing tightly the mould.
On the other hand, the thin-wall annular sheet metal part assembling method provided by the application adopts the following technical scheme:
optionally, the assembling method of the thin-wall annular sheet metal part includes the following steps:
collecting the shrinkage deformation amount of the sheet metal part under the dry ice cooling through theoretical calculation and tests, and collecting the shrinkage amount of the sheet metal part under the dry ice cooling through theoretical calculation and test data;
designing the mould according to the average value of the data of the dry ice cooling shrinkage of the sheet metal part;
fixing the part to the base as described above by means of the jig assembly as described above;
mounting the cooled sheet metal part on the die, and enabling the plug pin to penetrate through the sheet metal hole;
controlling the die to enable a guide shaft on the base to penetrate through an inner hole of the mandrel and ensure that a first guide plane is attached to a second guide plane;
applying pressure towards the base to the die to enable the die and the sheet metal part to enter the part and reach a designed position;
returning the sheet metal part to normal temperature, returning the bolt, and taking out the die.
To sum up, the application comprises the following beneficial technical effects:
according to the method, the sheet metal part and the parts are assembled by adopting a cold-assembling method, and the die matched with the low-temperature sheet metal part is designed, so that the problems of large roundness and large local stress deformation in the sheet metal part assembling process are solved;
the clamp assembly is designed to determine the position and the circumferential state of a part on the base, the assembly angle is controlled through the matching of the guide shaft and the inner hole of the mandrel, the problem that the sheet metal part cannot rotate due to large interference after assembly is solved, the assembly angle cannot meet the drawing requirement is solved, meanwhile, the guide shaft and the inner hole of the mandrel are precisely matched, the part is controlled to be inclined, the problem of clamping stagnation in the assembly process is solved, the problem that the part is difficult to advance and retreat in the assembly process, and final assembly fails is avoided;
the assembly pressure is applied through the screw mechanism and the gravity of the die, so that the pressure in the assembly process can be generated, the parts are uniformly stressed, and the problems of slight clamping stagnation or no assembly of metal plates to the bottom in the assembly process are assisted.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural view of a sheet metal part according to the present application;
FIG. 2 is a schematic structural view of a mold according to the present application;
FIG. 3 is a schematic view of an assembly structure of a sheet metal part and a part according to the present application;
FIG. 4 is a schematic view of an assembly structure of a sheet metal part and a part when the nut is used for applying assembly pressure according to the present application.
Description of reference numerals: 1. a sheet metal part; 11. a sheet metal hole; 2. a part; 21. a boss; 3. a mold; 31. a bolt; 32. an inner hole of the mandrel; 33. a second guide plane; 34. three frames; 35. a guide strip; 4. a base; 41. a guide shaft; 42. a first guide plane; 5. circumferential positioning blocks; 51. a pressing block; 52. a waist-shaped groove; 53. a process outer ring; 6. a screw; 61. a nut; 62. an adapter sleeve.
Detailed Description
The embodiments of the present application will be described in detail below with reference to the accompanying drawings.
The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The present application is capable of other and different embodiments and its several details are capable of modifications and/or changes in various respects, all without departing from the spirit of the present application. It should be noted that the features in the following embodiments and examples may be combined with each other without conflict. 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.
It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the present application, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. In addition, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to or other than one or more of the aspects set forth herein.
It should be further noted that the drawings provided in the following embodiments are only schematic illustrations of the basic concepts of the present application, and the drawings only show the components related to the present application rather than the numbers, shapes and dimensions of the components in actual implementation, and the types, the numbers and the proportions of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.
In addition, in the following description, specific details are provided to provide a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.
The embodiment of the application provides a thin-wall annular sheet metal part assembling device.
As shown in fig. 1-3, a plurality of uniformly distributed sheet metal holes 11 are formed in a circumferential side wall of the sheet metal part 1, the sheet metal part 1 is assembled in an annular part 2, and a boss 21 protruding in a radial direction is formed in an outer wall of the part 2, wherein the number of the sheet metal holes 11 is even, when the sheet metal part 1 and the part 2 are correctly assembled, an included angle between the boss 21 and one sheet metal hole 11 is α, and α in this embodiment is equal to 15 °.
The thin-wall annular sheet metal part 1 assembling device comprises:
as shown in fig. 2, a mold 3, the outer side of the mold 3 is matched with the inner side of the sheet metal part 1, which contracts in a low-temperature environment, a plurality of positioning pins 31 which slide along the radial direction are arranged on the mold 3, different positioning pins 31 penetrate through the side wall of the mold 3 and can be inserted into different sheet metal holes 11 at the same time, the number of the pins 31 is two, and the two pins 31 are distributed relatively.
A base 4, said part 2 being placed on said base 4.
The fixture assembly is fixed on the base 4 and distributed on the periphery of the part 2, and the fixture assembly is used for stabilizing the position of the part 2 on the base 4.
As shown in fig. 3, wherein, be equipped with on the base 4 with behind the fixed position the coaxial leading axle 41 of part 2, be equipped with first guide plane 42 on the leading axle 41, be equipped with the confession on the mould 3 the dabber hole 32 that leading axle 41 passed, the center of dabber hole 32 with the axle center coincidence of mould 3, dabber hole 32 inner wall butt the lateral wall of leading axle 41, just be equipped with the second guide plane 33 with the laminating of first guide plane 42 on the dabber hole 32.
The base material of the part 2 is high-temperature alloy, the cooling speed is high, the shrinkage of the part 2 cannot meet the assembly requirement by adopting a hot-charging method through calculation, and the sheet metal part 1 and the part 2 are assembled by adopting a cold-charging method.
Collecting the shrinkage deformation of the sheet metal part 1 under the cooling of dry ice through theoretical calculation and test;
according to the mean value of the data of the dry ice cooling shrinkage of the sheet metal part 1, a mould 3 matched with the profile of the sheet metal part 1 is designed, and the problems of large roundness and large local stress deformation in the process of assembling the sheet metal part 1 are solved; specifically, by theoretical calculation and tests, the shrinkage deformation amount of the sheet metal part 1 under the dry ice cooling is collected, and the shrinkage amount of the sheet metal part 2 under the dry ice cooling is collected by theoretical calculation and test data:
Δ D = Φ A- Φ D (Φ A is the diameter before cooling and Φ D is the diameter after cooling)
Φ D = Φ a + Φ a B C (B is the coefficient of expansion and contraction of the material, C is the temperature)
The diameter shrinkage of the sheet metal part 1 is 0.4mm through theoretical calculation, and the average diameter shrinkage of the sheet metal part 1 is 0.3 mm-0.38 mm through experimental data collection.
According to the mean value of the data of the dry ice cooling shrinkage of the sheet metal part 1, a mould 3 matched with the outline of the sheet metal part 1 after shrinkage is designed, and the problems of large roundness and large local stress deformation in the process of assembling the sheet metal part 1 are solved; through computational analysis, because sheet metal component 1 circularity is great and the structure abnormal shape, need its profile correction of its profile with its profile assorted mould 3, also guarantee the even atress of assembling process sheet metal component 1 simultaneously, avoid local atress to lead to sheet metal component 1 to warp uncontrollable and make the assembly degree of difficulty increase.
The assembly of heterotypic structure sheet metal component 1 has the angular requirement, through the cooperation control assembly angle of leading shaft 41 and dabber hole 32, solve the assembly and accomplish the back, because there is great interference to lead to the unable rotation of sheet metal component 1, cause the unsatisfied drawing requirement's of assembly angle problem, leading shaft 41 and dabber hole 32 precision fit simultaneously, control part 2 slope, the jamming problem in the solution assembling process, it makes 2 advance and retreat difficulties of part to avoid assembling process, final assembly failure.
Finally, by utilizing the expansion characteristic of the normal-temperature sheet metal part 1, a gap is formed between the expanded sheet metal part 1 and the mold 3, the mold 3 is convenient to take out, and the problem that the mold 3 cannot be taken out after assembly is solved ingeniously. And (3) carrying out an assembly test by using the die 3, and optimizing and perfecting the scheme according to the field assembly condition.
Specifically, the fixture assembly includes a circumferential positioning block 5 fixed on the base 4, the part 2 rotates on the base 4 in the circumferential direction until the boss 21 abuts against the circumferential positioning block 5, and the angle between the straight line perpendicular to the first guide plane 42 and passing through the axis of the guide shaft 41 and the axis of the boss 21 is alpha. The part 2 on the base 4 is circumferentially positioned by a circumferential positioning block 5. So that the boss 21 and the first guide plane 42 maintain a determined circumferential relationship.
The clamp assembly comprises a plurality of pressing blocks 51 distributed on a base 4, and when the pressing blocks 51 are fixed on the base 4 through bolts, the pressing blocks 51 press a process outer ring 53 on the outer edge of the part 2 on the base 4. The part 2 which is positioned is stabilized on the base 4 by the press piece 51. The pressing block 51 is provided with a waist-shaped groove 52 for a bolt to pass through, and the length direction of the waist-shaped groove 52 extends along the proceeding direction of the die 3, so that the pressing block 51 can slide along the waist-shaped groove 52, and the pressing block 51 is controlled to be close to the part 2. The process outer ring 53 is an extra portion machined on the outer periphery of the component 2 to fix the component 2, and the process outer ring 53 is removed after the assembly is completed to restore the original shape of the component 2.
The design makes arbitrary the axis direction perpendicular to of bolt 31 second guide plane 33, after bolt 31 inserted sheet metal hole 11, just can guarantee the contained angle of sheet metal hole 11 and boss 21, promptly, satisfies the angular requirement of assembly. Specifically, during assembly, one of the pins 31 aligns with the second guide plane 33, the first guide plane 42 aligns with the second guide plane 33, the pin 31 aligns with the first guide plane 42, and the pin 31 and the first guide plane 42 maintain a certain circumferential relationship, so that the sheet metal hole 11 and the boss 21 maintain a certain circumferential relationship, that is, the sheet metal hole 11 aligns with the first guide plane 42 in the assembly process, so that an included angle between the sheet metal hole 11 and the boss 21 is α, and the assembly angular requirement is met.
Be equipped with the through-hole that supplies the dabber to pass on the mould 3, be fixed with the rectangle frame on the mould 3, the center of rectangle frame and the axle center coincidence of mould 3, the inner wall of rectangle frame forms the hole, the rectangle frame includes one side open-ended trilateral frame 34 and seals open-ended guide strip 35, and trilateral frame 34 and guide strip 35 pass through the bolt fastening on mould 3, the inner wall of guide strip 35 forms second guide plane 33. The individual guide strips 35 allow the second guide plane 33 to be quickly found during the assembly process.
As shown in fig. 4, one side of leading axle 41 back to base 4 is equipped with screw rod 6, thin wall annular sheet metal component 1 assembly quality still includes application of force subassembly, application of force subassembly is including encircleing switching sleeve 62 and the nut 61 in the dabber outside, nut 61 and the coaxial setting of switching sleeve 62, nut 61 with screw rod 6 threaded connection rotates nut 61 drives switching sleeve 62's terminal surface laminating and compress tightly mould 3.
The assembly pressure is applied through the gravity of the screw mechanism and the mold 3, so that the pressure in the assembly process can be generated, the part 2 is uniformly stressed, slight clamping stagnation or the problem that a metal plate is not assembled to the bottom in the assembly process is assisted to be completed, the assembly of the sheet metal part 1 is better completed, the maximum pressure and the minimum pressure required by the assembly are calculated through a calculation formula P = delta/Df (Ca/Ea + Ci/Ei) of the interference fit assembly press-in force, an appropriate screw thread is selected, and the assembly pressure is transmitted through the screwing force.
The sheet metal part 1 has large roundness and is of a special-shaped structure, the sheet metal part 1 is large and irregular in stress deformation in the assembling process, and the deformation cannot be controlled; the wall thickness of sheet metal component 1 is thin only 0.8mm, and the diameter is about 400mm, and size and technical condition can only guarantee under the restraint state usually, during the assembly, in case the atress is inhomogeneous will take place irregular deformation, lead to the assembly degree of difficulty increase.
Through the heterotypic structure of analysis sheet metal component 1, design restraint mould 3, correctable sheet metal component 1 circularity avoids panel beating atress deformation problem in the assembling process simultaneously, but restraint mould 3's overall dimension is difficult point really, need carry out theoretical calculation and a large amount of field test, just can confirm, the time and the method of certain solidification dry ice cooling sheet metal component 1 simultaneously, otherwise just can have the problem of the assembly clearance mismatch of mould 3 and sheet metal component 1.
The assembly interference magnitude of this application is great, and the 2 shrink volume recovery time of part is fast, and in case the slope of sheet metal component 1 in the assembling process, the jamming will appear. The recovery time of the shrinkage of the sheet metal part 1 is short, a series of flow actions in the assembly process must be coherent, otherwise, once the shrinkage is recovered, the sheet metal part 1 cannot rotate in the sheet metal part 2 due to large interference of the sheet metal part 2, and the sheet metal part simultaneously advances and retreats difficultly.
This application is through the analysis, and manual assembly is the angular requirement of unable assurance, can't guarantee the 2 slope problems of part in the assembling process simultaneously, and through the mould 3 of this application of design, anchor clamps subassembly, base 4, aiming at shaft 41 and the supplementary assembly fixture of dabber hole 32, through two point demands above the frock control, reduce the assemble duration by a wide margin, the assembly is accomplished to high efficiency in effective cooling time.
This application sheet metal component 1 is except interference fit, still will be less than 2 base member surfaces of part, still can have the jamming phenomenon occasionally in the assembling process, so assembly pressure is required, and assembly pressure requires to be the even atress of messenger's part 2, consequently, through looking up relevant data, selects nut and screw thread size through calculating, transmits assembly pressure through the nut mode of screwing.
This application uses nut 61 transmission assembly pressure in assembling process, controls sheet metal component 1 assembly depth and pressure overload risk through effective thread length and adapter sleeve 62.
The traditional manual assembly can not realize the interference assembly of the thin-wall large-diameter sheet metal part 1, the failure rate is 100%, the assembly can be quickly completed in effective cooling time by applying the die 3 and the self-positioning mechanism, a large amount of field tests prove that the assembly scheme is efficient and reliable, the success rate is more than 98%, the labor intensity of operators is reduced, the cost is greatly reduced, the product quality is guaranteed, and the interference assembly technology is advanced in scientific development.
The embodiment of the application also discloses an assembly method of the thin-wall annular sheet metal part 1,
a method for assembling a thin-wall annular sheet metal part 1 comprises the following steps:
through theoretical calculation and experiments, the shrinkage deformation amount of the sheet metal part 1 cooled by the dry ice is collected, and the shrinkage amount of the sheet metal part 2 cooled by the dry ice is collected through theoretical calculation and experimental data.
And designing the mold 3 according to the average value of the dry ice cooling shrinkage data of the sheet metal part 1.
The part 2 is secured to the base 4 by the clamp assembly described above. Specifically, the boss 21 abuts against the circumferential positioning block 5, the boss 21 does not abut against the circumferential positioning block 50.02 clearance gauge, and the part 2 is tightly pressed, so that the problem that the boss 21 and the positioning block of the part 2 generate a gap in the assembling process to cause angular over-tolerance is avoided; the adjusting press block 51 presses the process outer ring 53.
And (3) mounting the cooled sheet metal part 1 on the die 3, and enabling the bolt 31 to penetrate through the sheet metal hole 11.
And controlling the die 3 to enable the guide shaft 41 on the base 4 to penetrate through the mandrel inner hole 32, and ensuring that the first guide plane 42 is attached to the second guide plane 33.
A pressure is applied to the mould 3 towards the base 4, so that the mould 3 and the sheet metal part 1 enter the part 2 and reach the design position. Specifically, the nut is tightened with a wrench to apply the assembly pressure.
And returning the sheet metal part 1 to the normal temperature, returning the bolt 31, and taking out the die 3.
And loosening the nut, taking out the die 3, and checking whether the bottom surface of the metal plate is higher than the base body of the part 2.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (8)
1. The utility model provides an annular sheet metal component assembly quality of thin wall, be equipped with a plurality of evenly distributed's panel beating hole on the sheet metal component circumference lateral wall, the sheet metal component assembles in annular part, the part outer wall is equipped with along radial convex boss, its characterized in that, annular sheet metal component assembly quality of thin wall includes:
the outer side surface of the die is matched with the inner side surface of the sheet metal part contracted in the low-temperature environment, a plurality of positioning bolts sliding along the radial direction are arranged on the die, and different positioning bolts can be simultaneously inserted into different sheet metal holes;
a base on which the part is placed;
the clamp assemblies are fixed on the base and distributed on the periphery of the part, and are used for stabilizing the position of the part on the base;
wherein, be equipped with on the base with behind the fixed position the coaxial leading shaft of part, be equipped with first guide plane on the leading shaft, be equipped with the confession on the mould the dabber hole that the leading shaft passed, the center of dabber hole with the axle center coincidence of mould, dabber hole inner wall butt the lateral wall of leading shaft, just be equipped with the second guide plane with the laminating of first guide plane on the dabber hole.
2. The thin-walled annular sheet metal component assembly device of claim 1, wherein the diameter shrinkage of the sheet metal component in a low temperature environment is 0.3-0.38mm.
3. The thin-wall annular sheet metal part assembling device according to claim 1, wherein the number of the sheet metal holes is even, when the sheet metal part and the part are correctly assembled, an included angle between the boss and one of the sheet metal holes is α, an included angle between a straight line which is perpendicular to the first guide plane and passes through the axis of the guide shaft and the axis of the boss of the part after being fixed in position is α, and the axis direction of any one of the pins is perpendicular to the second guide plane.
4. The thin-wall annular sheet metal part assembling device as claimed in claim 1, wherein the clamp assembly comprises a plurality of pressing blocks distributed on a base, and when the pressing blocks are fixed on the base through bolts, the pressing blocks press the process outer ring on the outer edge of the part against the base.
5. The assembly device for the thin-walled annular sheet metal part according to claim 3, wherein the clamp assembly comprises a circumferential positioning block fixed on the base, and when the part rotates circumferentially on the base until the boss abuts against the circumferential positioning block, an included angle between a straight line perpendicular to the first guide plane and passing through the axis of the guide shaft and the axis of the boss is α.
6. The assembly device for the thin-wall annular sheet metal parts according to claim 1, wherein a through hole for a mandrel to pass through is formed in the die, a rectangular frame is fixed on the die, the center of the rectangular frame is overlapped with the axis of the die, the inner hole is formed in the inner wall of the rectangular frame, the rectangular frame comprises a three-side frame with an opening on one side and a guide strip with a closed opening, and the second guide plane is formed in the inner wall of the guide strip.
7. The assembly device of thin-wall annular sheet metal parts according to claim 1, characterized in that one side of the guide shaft, which faces away from the base, is provided with a screw, the assembly device of thin-wall annular sheet metal parts further comprises a force application component, the force application component comprises a switching sleeve and a nut which surround the outer side of the mandrel, the nut and the switching sleeve are coaxially arranged, the nut is in threaded connection with the screw, the nut is rotated to drive the end face of the switching sleeve to be attached to and tightly press the die.
8. The method for assembling the thin-wall annular sheet metal part is characterized by comprising the following steps of:
collecting the shrinkage deformation amount of the sheet metal part under the dry ice cooling through theoretical calculation and test, and collecting the shrinkage amount of the sheet metal part under the dry ice cooling through theoretical calculation and test data;
designing the mold according to any one of claims 1-7 according to the mean value of the data of the dry ice cooling shrinkage of the sheet metal part;
securing the part to the base of any of claims 1-7 by the clamp assembly of any of claims 1-7;
mounting the cooled sheet metal part on the die, and enabling the plug pin to penetrate through the sheet metal hole;
controlling the die to enable a guide shaft on the base to penetrate through an inner hole of the mandrel and ensure that a first guide plane is attached to a second guide plane;
applying pressure towards the base to the die to enable the die and the sheet metal part to enter the part and reach a designed position;
and returning the sheet metal part to normal temperature, returning the bolt and taking out the die.
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|---|---|
| CN115283937B (en) | 2023-11-10 |
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