CN212634364U - Special mandrel for processing slender thin-wall parts - Google Patents
Special mandrel for processing slender thin-wall parts Download PDFInfo
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- CN212634364U CN212634364U CN202021129448.0U CN202021129448U CN212634364U CN 212634364 U CN212634364 U CN 212634364U CN 202021129448 U CN202021129448 U CN 202021129448U CN 212634364 U CN212634364 U CN 212634364U
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- elastic sleeve
- end part
- mandrel
- wall pipe
- fastening nut
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Abstract
The utility model discloses a special mandrel for processing slender thin-wall pipe parts, which comprises a mandrel body, wherein the mandrel body comprises a left end part, a middle section and a right end part, the left end part, the middle section and the right end part are all cylinders, and the diameter of the left end part is equal to that of the right end part and is smaller than that of the middle section; the left end part of the mandrel is provided with a left fastening device, and the right end part of the mandrel is provided with a right fastening device; the mandrel body is coaxially provided with a plurality of sections of elastic sleeves, each elastic sleeve comprises an inner elastic sleeve and an outer elastic sleeve, the inner elastic sleeve is coaxially sleeved on the mandrel body, and the outer elastic sleeve is coaxially sleeved on the inner elastic sleeve. The utility model discloses machining precision is high, compact structure is practical, positioning accuracy is good, convenient operation.
Description
Technical Field
The utility model belongs to the technical field of machining, specifically speaking is a special dabber of long and thin wall pipe class part of processing.
Background
The thin-wall pipe parts are widely applied due to the characteristics of good corrosion resistance, high-temperature strength, good heat radiation resistance, strong impact resistance, material saving, light weight and the like. However, the thin-wall pipe part has high machining difficulty, and the problem that high machining precision is difficult to ensure in the field of machining is particularly that the thin and long thin-wall pipe part for a space nuclear power device has high precision requirement and high machining difficulty. The processing of thin-wall pipe parts has the following problems: 1) the thin-wall pipe part has small elastic modulus, and is easy to generate large elastic deformation under the action of cutting force and clamping force, so that the machining precision is influenced; 2) in the machining process, under the action of alternating cutting force, the thin-wall pipe parts are easy to generate resonance phenomenon which is not beneficial to machining, and leave vibration traces on the machined surface, so that the surface roughness and the dimensional accuracy of a workpiece are influenced; 3) the thin-wall pipe part has large length-diameter ratio, is easy to generate clamping deformation, has large positioning difficulty during processing and is difficult to clamp.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a special dabber of long and thin wall pipe class part of processing solves above technical problem.
In order to achieve the above purpose, the utility model adopts the technical scheme that: a special mandrel for processing slender thin-wall pipe parts comprises a mandrel body, wherein the mandrel body comprises a left end part, a middle section and a right end part, the left end part, the middle section and the right end part are all cylinders, and the diameter of the left end part is equal to that of the right end part and is smaller than that of the middle section; the left end part is provided with a left fastening device, and the right end part is provided with a right fastening device; the mandrel body is coaxially sleeved with a plurality of sections of elastic sleeves, each elastic sleeve comprises an inner elastic sleeve and an outer elastic sleeve, the inner elastic sleeve is coaxially sleeved on the mandrel body, and the outer elastic sleeve is coaxially sleeved on the inner elastic sleeve.
As a preferred technical scheme: the outer surface of the inner elasticity is a conical surface, and the inner surface of the outer elastic sleeve is a conical surface.
As a preferred technical scheme: the outer side of the left end part is provided with threads, the left fastening device is a left fastening nut, and the left fastening nut is in threaded fit connection with the outer side of the left end part.
As a preferred technical scheme: the right end part is provided with threads on the outer side, the right fastening device is a right fastening nut, and the right fastening nut is in threaded fit connection with the outer side of the right end part.
As a preferred technical scheme: the surface of left side fastening nut be the notch cuttype structure, the notch cuttype structure divide into first section and second section, the surface of second section for the conical surface.
As a preferred technical scheme: the inner hole of the right fastening nut is of a stepped hole structure.
As a preferred technical scheme: the surface of the inner elastic sleeve and the surface of the outer elastic sleeve are provided with a plurality of through grooves which are radial through grooves, one axial end of each through groove is open, and the other end of each through groove does not reach the end face.
As a preferred technical scheme: the two ends of the mandrel body are provided with tapered holes.
The utility model has the advantages that: a special dabber of processing slender thin wall pipe class part compares with traditional structure: 1) when the slender thin-wall pipe part is machined, the mandrel body is arranged in the slender thin-wall pipe part to play a supporting role, so that the deformation of the slender thin-wall pipe part is reduced; 2) the elastic sleeve is of an inner-layer structure and an outer-layer structure, the fastening devices at two ends are screwed down to enable the elastic sleeve to generate tensioning force, the tensioning force acts between the slender thin-wall pipe part and the elastic sleeve and generates friction force, the damping of a slender thin-wall pipe part processing system can be increased, and the influence of resonance is effectively eliminated; 3) the tensioning force can be controlled through the fastening structure and the elastic sleeve, and the fit clearance is adjusted to meet the requirements of different processing precision; 4) tapered holes at two ends of the mandrel body are used for clamping a machine tool, so that the positioning precision of a workpiece is improved, and the influence of clamping deformation on the machining precision of the workpiece can be eliminated by matching with a fastening nut; 5) compact structure, simple clamping and dismounting and easy operation.
Drawings
FIG. 1 is a schematic sectional view of the main body of the present invention;
FIG. 2 is a schematic sectional view of the elastic sheath of the present invention;
FIG. 3 is a schematic view of the inner elastic sleeve structure of the present invention;
FIG. 4 is a left side view of the inner elastic sleeve of the present invention;
FIG. 5 is a schematic view of the structure of the outer elastic sleeve of the present invention;
FIG. 6 is a left side view of the outer elastic sleeve of the present invention;
FIG. 7 is a schematic cross-sectional view of the left fastening device of the present invention;
FIG. 8 is a schematic cross-sectional view of the right fastening device of the present invention;
in the figure: 1. the mandrel comprises a mandrel body, 1-1 parts of left end parts, 1-2 parts of middle parts, 1-3 parts of right end parts, 1-4 parts of conical holes, 2 parts of slender thin-wall pipes, 3 parts of inner elastic sleeves, 4 parts of outer elastic sleeves, 5 parts of left fastening devices, 5-1 parts of first sections, 5-2 parts of second sections, 6 parts of right fastening devices, 6-1 parts of large holes, 6-2 parts of small holes and 7 parts of through grooves
Detailed Description
The invention is further described below with reference to the accompanying drawings:
referring to fig. 1-8, a special mandrel for processing slender thin-walled tube parts includes a mandrel body 1, the mandrel body 1 is of a solid structure, the mandrel body 1 includes a left end portion 1-1, a middle section 1-2 and a right end portion 1-3, the left end portion 1-1, the middle section 1-2 and the right end portion 1-3 are all cylinders, the center lines of the left end portion 1-1, the middle section 1-2 and the right end portion 1-3 are coaxial, and the diameter of the left end portion 1-1 is equal to that of the right end portion 1-3 and is smaller than that of the middle section 1-2; the left end part 1-1 is provided with a left fastening device 5, and the right end part 1-3 of the mandrel is provided with a right fastening device 6; the mandrel body 1 is coaxially provided with a plurality of sections of elastic sleeves, each elastic sleeve comprises an inner elastic sleeve 3 and an outer elastic sleeve 4, the inner elastic sleeve 3 is coaxially sleeved on the mandrel body 1, the outer elastic sleeve 4 is coaxially sleeved on the inner elastic sleeve 3, the structure is arranged in the slender thin-wall pipe part 2 and can play a supporting role for the slender thin-wall pipe part 2, the slender thin-wall pipe part 2 is clamped by screwing the left fastening device and the right fastening device, the deformation of the slender thin-wall pipe part 2 can be obviously reduced, and the elastic sleeves can generate tensioning force by screwing the left fastening device and the right fastening device, so that the processing damping of the slender thin-wall pipe part 2 is increased, the resonance influence is effectively eliminated, and the processing precision is improved.
As shown in fig. 1-8, the outer surface of the inner elastic sleeve 3 is a conical surface, the inner surface of the inner hole of the outer elastic sleeve 4 is a conical surface, the end with the large outer diameter of the inner elastic sleeve 3 is a left end, the end with the small outer diameter is a right end, the end with the large inner diameter of the outer elastic sleeve 4 is a left end, and the end with the small inner diameter is a right end, so that the resistance of the inner elastic sleeve 3 entering the inner hole of the outer elastic sleeve 4 can be reduced by the conical surface structure, and the inner elastic sleeve 3 and the outer elastic sleeve 4 are.
As shown in fig. 1-8, the outer side of a section of the left end portion 1-1 close to the middle section 1-2 is provided with threads, the left fastening device 5 is a left fastening nut, the left fastening nut is in threaded fit connection with the outer side of the left end portion 1-1, and the left fastening nut can be tightly connected with the mandrel body 1 by screwing the left fastening nut.
As shown in fig. 1-8, the outside of a section of the right end portion 1-3 of the mandrel close to the middle section 1-2 is provided with threads, the right fastening device 6 is a right fastening nut, the right fastening nut is in threaded fit connection with the outside of the right end portion 1-3, and the right fastening nut can be tightly connected with the mandrel body 1 by screwing the right fastening nut.
As shown in fig. 1-8, the left fastening nut outside is the notch cuttype structure, the notch cuttype structure divide into first section 5-1 and second section 5-2, the surface of second section 5-2 be the conical surface, the external diameter of first section 5-1 is greater than the maximum external diameter of second section 5-2, and the maximum external diameter of second section 5-2 is not more than the maximum external diameter of interior elastic sleeve 3, through screwing up left fastening nut, the hole of elastic sleeve 4 outside the conical surface embedding, the left end face of elastic sleeve 3 is withstood to the terminal surface of second section 5-2, promotes interior elastic sleeve 3 right axial displacement.
As shown in fig. 1-8, the inner hole of the right fastening nut is a stepped hole structure, the stepped hole structure forms two holes with different diameters, the larger diameter is a large hole 6-1, the smaller diameter is a small hole 6-2, the inner hole of the right fastening nut facing one end of the elastic sleeve is the large hole 6-1, the diameter of the large hole 6-1 is not smaller than the minimum inner diameter of the outer elastic sleeve 4, and by screwing the right fastening nut, one end of the large hole 6-1 of the right fastening nut abuts against the end face of the outer elastic sleeve 4 to push the outer elastic sleeve 4 to move axially leftwards.
As shown in fig. 1-8, the surfaces of the inner elastic sleeve 3 and the outer elastic sleeve 4 are provided with a plurality of through grooves 7, for example, the inner elastic sleeve 3, the through grooves 7 are radial through grooves, the through grooves 7 are uniformly distributed on the sleeve wall of the inner elastic sleeve 3, one axial end of each through groove 7 is open, the other end of each through groove does not reach the end surface, the number of the through grooves 7 can be four, eight or twelve, firstly, half of the through grooves 7 are axially formed from the left end surface of the inner elastic sleeve 3 to the right end of the inner elastic sleeve 3, then, the other half of the through grooves 7 are axially formed from the right end surface of the inner elastic sleeve 3 to the left end of the inner elastic sleeve 3, the structures of the through grooves 7 of the outer elastic sleeve 4 are the same as those of the through grooves 7 of the inner elastic sleeve 3, when the left fastening nut axially compresses the inner elastic sleeve 3, because the through grooves 7 are arranged on the surface of the inner elastic sleeve, the inner elastic sleeve 3 and the outer elastic sleeve 4 are clamped mutually under the tensioning action, when the outer elastic sleeve 4 is axially compressed by the right fastening nut, the sleeve wall of the outer elastic sleeve 4 is provided with the through groove 7, so that the outer elastic sleeve 4 is fully expanded in the radial direction to generate the tensioning force, the tensioning action is exerted between the outer elastic sleeve 4 and the slender thin-wall pipe part 2 to generate friction, the slender thin-wall pipe part 2 rotates along with the mandrel body 1 during turning, the deformation of the inner elastic sleeve 3 and the outer elastic sleeve 4 is adjusted by screwing the left fastening nut and the right fastening nut, the fit clearance between the outer elastic sleeve 4 and the inner wall of the slender thin-wall pipe part 2 is adjusted, and different machining precision requirements are met.
As shown in figures 1-8, the central holes at the two ends of the mandrel body 1 are high-precision tapered holes 1-4, and when machining is performed, the mandrel body 1 is clamped on a machine tool in a mode that the two ends of the mandrel body support against the tapered holes 1-4, so that the positioning precision of the mandrel body 1 on the machine tool is improved.
The working process of the embodiment is as follows: when a workpiece is clamped, a left-end fastening nut is sleeved on a left end part 1-1 of a mandrel, a first section of inner elastic sleeve 3 is sleeved on a right end of a mandrel body 1, the inner elastic sleeve 3 is moved to the left end of a middle part 1-2, a slender thin-walled tube part 2 is sleeved on the left end of the mandrel body 1, a first section of outer elastic sleeve 4 is installed on the right end of the mandrel body 1 and is matched and connected with the first section of inner elastic sleeve 3, the plurality of sections of inner elastic sleeves 3 and the outer elastic sleeves 4 are sleeved in this way, the slender thin-walled tube part 2 is moved to symmetrical positions at two ends of the middle part 1-2 of the mandrel, and finally the left fastening nut and the right fastening nut are screwed so that the inner elastic sleeve 3 and the outer elastic sleeve 4 are clamped mutually and generate tensioning force to tension the slender thin-walled tube part 2 and the elastic sleeves, and clamping of the slender thin-walled tube part 2 is completed; when the slender thin-wall pipe type part 2 is disassembled, the left fastening nut and the right fastening nut are unscrewed, the two nuts are replaced, the right fastening nut is arranged at the left end, one end of the large hole 6-1 faces the elastic sleeve, the left fastening nut is arranged at the right end, one end of the second section 5-2 of the left fastening nut faces the elastic sleeve, and the left fastening nut and the right fastening nut are gradually screwed, so that the inner elastic sleeve 3 and the outer elastic sleeve 4 are loosened.
The sizes of the mandrel body, the elastic sleeve, the left fastening nut and the right fastening nut and the number of the sections of the elastic sleeve are all determined by the size of the thin-wall pipe type part.
The foregoing examples are given for the purpose of illustrating the present invention in a clear and non-restrictive manner, and it will be apparent to those skilled in the art that variations and modifications of the present invention may be made in other variations and modifications based on the foregoing description, and it is not necessary or necessary to exhaustively enumerate all embodiments, and all such variations and modifications as are obvious and desirable in the art are within the scope of the present invention.
Claims (8)
1. The utility model provides a special dabber of long and thin wall pipe class part of processing, includes dabber body (1), dabber body (1) including left end portion (1-1), interlude (1-2) and right-hand member portion (1-3), its characterized in that: the left end part (1-1), the middle section (1-2) and the right end part (1-3) are all cylinders, the diameter of the left end part (1-1) is equal to that of the right end part (1-3) and is smaller than that of the middle section (1-2), the left end part (1-1) is provided with a left fastening device (5), and the right end part (1-3) is provided with a right fastening device (6); the mandrel body (1) is coaxially sleeved with a plurality of sections of elastic sleeves, each elastic sleeve comprises an inner elastic sleeve (3) and an outer elastic sleeve (4), the inner elastic sleeve (3) is coaxially sleeved on the mandrel body (1), and the outer elastic sleeve (4) is coaxially sleeved on the inner elastic sleeve (3).
2. The special mandrel for processing the slender thin-wall pipe parts as claimed in claim 1, wherein: the outer surface of the inner elastic sleeve (3) is a conical surface, and the inner surface of the outer elastic sleeve (4) is a conical surface.
3. The special mandrel for processing the slender thin-wall pipe parts as claimed in claim 1, wherein: the outer side of the left end part (1-1) is provided with threads, the left fastening device (5) is a left fastening nut, and the left fastening nut is in threaded fit connection with the outer side of the left end part (1-1).
4. The special mandrel for processing the slender thin-wall pipe parts as claimed in claim 1, wherein: the outer side of the right end part (1-3) is provided with threads, the right fastening device (6) is a right fastening nut, and the right fastening nut is in threaded fit connection with the outer side of the right end part (1-3).
5. The special mandrel for processing the slender thin-wall pipe parts as claimed in claim 3, wherein: the surface of left side fastening nut be the notch cuttype structure, the notch cuttype structure divide into first section (5-1) and second section (5-2), the surface of second section (5-2) be the conical surface.
6. The special mandrel for processing the slender thin-wall pipe parts as claimed in claim 4, wherein: the inner hole of the right fastening nut is of a stepped hole structure.
7. The special mandrel for processing the slender thin-wall pipe parts as claimed in claim 1, wherein: the surface of the inner elastic sleeve (3) and the surface of the outer elastic sleeve (4) are provided with a plurality of through grooves (7), the through grooves (7) are radial through grooves, one axial end of each through groove (7) is open, and the other end of each through groove does not reach the end face.
8. The special mandrel for processing the slender thin-wall pipe parts as claimed in claim 1, wherein: two ends of the mandrel body (1) are provided with tapered holes (1-4).
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CN202021129448.0U CN212634364U (en) | 2020-06-17 | 2020-06-17 | Special mandrel for processing slender thin-wall parts |
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CN202021129448.0U CN212634364U (en) | 2020-06-17 | 2020-06-17 | Special mandrel for processing slender thin-wall parts |
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