Device for controlling grinding deformation of thin-wall hollow slender shaft
阅读说明:本技术 一种用于控制薄壁空心细长轴磨削变形的装置 (Device for controlling grinding deformation of thin-wall hollow slender shaft ) 是由 鲁攀 黄艳松 章灿 于 2019-10-20 设计创作,主要内容包括:一种用于控制薄壁空心细长轴磨削变形的装置,其包括,心棒、第一橡胶条、第二橡胶条、第三橡胶条和手柄。所述心棒包括顺序连接的第一棒身部、第二棒身部和第三棒身部,所述第一橡胶条用于套接在所述第一棒身部上,所述第二橡胶条用于套接在所述第二棒身部上,第三橡胶条用于套接在所述第三棒身部上,所述心棒与所述手柄可拆卸连接。本发明所提供的用于控制薄壁空心细长轴磨削变形的装置,能够对零件形成有效支撑,从而增强零件的整体刚性,有效控制了磨床夹持及磨削加工时零件薄壁部分的变形,也就可提高磨削参数,大大减少了磨削所需工时,从而大大提升了生产效率。此外还有效控制住了密封圈的连接位置分离的风险。(A device for controlling grinding deformation of a thin-wall hollow slender shaft comprises a mandrel, a first rubber strip, a second rubber strip, a third rubber strip and a handle. The utility model discloses a heart-piece, including the handle, the heart-piece includes first body portion, second body portion and third body portion that the order is connected, first rubber strip is used for cup jointing on the first body portion, the second rubber strip is used for cup jointing on the second body portion, the third rubber strip is used for cup jointing on the third body portion, the heart-piece with the handle can be dismantled and be connected. The device for controlling the grinding deformation of the thin-wall hollow slender shaft can effectively support parts, so that the integral rigidity of the parts is enhanced, the deformation of the thin-wall part of the parts during clamping and grinding of a grinding machine is effectively controlled, the grinding parameters can be improved, the working hours required by grinding are greatly reduced, and the production efficiency is greatly improved. In addition, the risk of separation of the connection positions of the sealing rings is effectively controlled.)
1. The utility model provides a device for controlling hollow slender axles grinding deformation of thin wall, hollow slender axles part of thin wall includes the axle body of wall thickness 0.5mm, the welding has five annular bosss on the axle body, there are first end spare and second end spare at the both ends of axle body welded connection respectively, is close to first end spare the boss be provided with one with the sealing washer that the axle body bonded, first end spare be provided with the blind hole of the hole intercommunication of axle body, second end spare be provided with in proper order with the same first intercommunicating pore of the hole diameter of axle body and the second intercommunicating pore of bigger diameter, second intercommunicating pore lateral wall is provided with the thin wall section of wall thickness 0.85 mm. The device is used for controlling the deformation of the thin-wall hollow slender shaft part when the outer circular surface of the boss is ground, and comprises a mandrel, a first rubber strip, a second rubber strip, a third rubber strip and a handle.
The mandrel comprises a first rod body part, a second rod body part and a third rod body part which are sequentially connected, the first rod body part is used for being inserted into the blind hole, the second rod body part is used for being inserted into the inner hole of the shaft body, the third rod body part is used for being inserted into the second communicating hole,
the diameter of the first rod body part is 1.8mm smaller than that of the blind hole, the length of the first rod body part is 1.5mm longer than that of the blind hole, the top surface and the side wall of the first rod body part are provided with first grooves which are crossed,
the diameter ratio of second barrel portion the diameter of the hole of axle body is 2mm less, and length ratio the hole of axle body detach with behind the connection position of first end head spare with first through-hole length with 1mm long, second barrel portion with the terminal surface that first barrel portion is adjacent is provided with first annular of concentric and second annular, first annular sets up first barrel portion with the crossing department of second barrel portion, first annular with be provided with between the second annular four with the first connecting groove that first recess corresponds, the outer disc of second barrel portion is provided with first spiral groove, the both ends of first spiral groove are connected with the third annular respectively.
The diameter ratio of third barrel the diameter of second intercommunicating pore is 2mm less, and length ratio the length of second intercommunicating pore is 20mm less, the outer disc of third barrel is provided with second spiral groove, the both ends of second spiral groove are connected with the fourth annular respectively. And the end surface of the third rod body is provided with a threaded connecting hole for connecting a handle.
The first rubber strip is used for being sleeved on the first rod body part, the second rubber strip is used for being sleeved on the second rod body part, the third rubber strip is used for being sleeved on the third rod body part,
the first rubber strip is provided with a cross part, a first annular part, a second annular part and a first communication part which are mutually connected corresponding to the first groove, the first annular groove, the second annular groove and the first communication groove respectively, the length dimension of each part of the first rubber strip is 1-2mm smaller than that of the corresponding groove respectively,
the second rubber strip and the third rubber strip are similar in structure and different in size, and the second rubber strip and the third rubber strip both comprise two circular rubber strips connected through a connecting rubber strip.
The mandrel is detachably connected with the handle through the threaded connecting hole.
2. The device according to claim 1, characterized in that the depth of the section of the third annular groove is not less than twice the radius of the section of the annular rubber strip of the second rubber strip.
3. The device according to claim 1, characterized in that the depth of the cross section of the fourth annular groove is not less than twice the radius of the cross section of the annular rubber strip of the third rubber strip.
4. The apparatus of claim 3 wherein said third and fourth ring grooves are grooves having a cross-sectional depth of 3 mm.
5. The device according to claim 1, characterized in that said first and second annular grooves are each provided with a section inclined to the axis of said mandrel and having a depth greater than 2/3 of the diameter of said first and second annular portions.
6. The method of claim 1, wherein the first, second, and third rubber strips are bonded to the mandrel.
7. The apparatus of claim 1, wherein the mandrel is fabricated using an ultra-hard aluminum alloy 7075-T6, and the heat treated state is solution aging.
8. The device of claim 1, wherein the first, second and third rubber strips are all rubber strips made by injection molding and having a circular cross section.
9. The apparatus of claim 8, wherein the first, second, and third rubber strips each have a cross-sectional radius set to 1.5 mm.
10. The device of claim 1, wherein the first groove, the first connecting groove, the first spiral groove and the second spiral groove are each provided with an arc surface having a radius of 1.5mm, and an arc length of the arc surface is 6/7 to 13/14 of an arc length of a semicircular surface having a radius of 1.5 mm.
Technical Field
The invention relates to the technical field of machining, in particular to a device for controlling deformation during grinding of an outer circular surface of a boss of a shaft body of a thin-wall hollow slender shaft part.
Background
Fig. 1 is a schematic diagram of a schematic structural principle of a cross-sectional view of a thin-walled hollow slender shaft part for an aircraft engine, and as shown in fig. 1, this thin-walled hollow slender shaft part 1 includes a shaft body 11 with a wall thickness of 0.5mm, five circular-ring-
The outer diameter phi 1 of the shaft body 11 is 15mm, the length L1 is larger than 900mm, the overall length L2 of the thin-wall hollow slender shaft part 1 is larger than 990mm, the depth L3 of the
In the production process, the outer disc of
In addition, because the wall thickness of the shaft body 11 is only 0.5mm, the
Disclosure of Invention
The technical problem to be solved by the invention is to provide a device for controlling the grinding deformation of a thin-wall hollow slender shaft, so as to reduce or avoid the problems mentioned above.
In order to solve the technical problem, the invention provides a device for controlling grinding deformation of a thin-wall hollow slender shaft, wherein a thin-wall hollow slender shaft part comprises a shaft body with the wall thickness of 0.5mm, five annular bosses are welded on the shaft body, a first end piece and a second end piece are respectively welded at two ends of the shaft body, a sealing ring which is bonded with the shaft body is arranged on the boss close to the first end piece, the first end piece is provided with a blind hole which is communicated with an inner hole of the shaft body, the second end piece is sequentially provided with a first communicating hole with the same diameter as the inner hole of the shaft body and a second communicating hole with a larger diameter, and the side wall of the second communicating hole is provided with a thin-wall section with the wall thickness of 0.85 mm. The device is used for controlling the deformation of the thin-wall hollow slender shaft part when the outer circular surface of the boss is ground, and comprises a mandrel, a first rubber strip, a second rubber strip, a third rubber strip and a handle.
The mandrel comprises a first rod body part, a second rod body part and a third rod body part which are sequentially connected, the first rod body part is used for being inserted into the blind hole, the second rod body part is used for being inserted into the inner hole of the shaft body, the third rod body part is used for being inserted into the second communicating hole,
the diameter of the first rod body part is 1.8mm smaller than that of the blind hole, the length of the first rod body part is 1.5mm longer than that of the blind hole, the top surface and the side wall of the first rod body part are provided with first grooves which are crossed,
the diameter ratio of second barrel portion the diameter of the hole of axle body is 2mm less, and length ratio the hole of axle body detach with behind the connection position of first end head spare with first through-hole length with 1mm long, second barrel portion with the terminal surface that first barrel portion is adjacent is provided with first annular of concentric and second annular, first annular sets up first barrel portion with the crossing department of second barrel portion, first annular with be provided with between the second annular four with the first connecting groove that first recess corresponds, the outer disc of second barrel portion is provided with first spiral groove, the both ends of first spiral groove are connected with the third annular respectively.
The diameter ratio of third barrel the diameter of second intercommunicating pore is 2mm less, and length ratio the length of second intercommunicating pore is 20mm less, the outer disc of third barrel is provided with second spiral groove, the both ends of second spiral groove are connected with the fourth annular respectively. And the end surface of the third rod body is provided with a threaded connecting hole for connecting a handle.
The first rubber strip is used for being sleeved on the first rod body part, the second rubber strip is used for being sleeved on the second rod body part, the third rubber strip is used for being sleeved on the third rod body part,
the first rubber strip is provided with a cross part, a first annular part, a second annular part and a first communication part which are mutually connected corresponding to the first groove, the first annular groove, the second annular groove and the first communication groove respectively, the length dimension of each part of the first rubber strip is 1-2mm smaller than that of the corresponding groove respectively,
the second rubber strip and the third rubber strip are similar in structure and different in size, and the second rubber strip and the third rubber strip both comprise two circular rubber strips connected through a connecting rubber strip.
The mandrel is detachably connected with the handle through the threaded connecting hole.
Preferably, the depth of the cross section of the third ring groove is not less than twice the radius of the cross section of the circular rubber strip of the second rubber strip.
Preferably, the depth of the cross section of the fourth ring groove is not less than twice the radius of the cross section of the circular rubber strip of the third rubber strip.
Preferably, the third ring groove and the fourth ring groove are grooves having a sectional depth of 3 mm.
Preferably, the first and second ring grooves are each provided with a cross section inclined to the axis of the mandrel and may have a depth greater than 2/3 of the diameters of the first and second annular portions.
Preferably, the first rubber strip, the second rubber strip and the third rubber strip are all bonded with the mandrel.
Preferably, the mandrel is made using a super hard aluminium alloy 7075-T6, the heat treated state being solution ageing.
Preferably, the first rubber strip, the second rubber strip and the third rubber strip are all rubber strips which are made in an injection molding mode and have circular sections.
Preferably, the first rubber strip, the second rubber strip and the third rubber strip are all set to have a section radius of 1.5 mm.
Preferably, the first groove, the first connecting groove, the first spiral groove and the second spiral groove are all provided with cambered surfaces with the radius of 1.5mm, and the arc length of the cambered surfaces is 6/7-13/14 of the arc length of a semi-circular surface with the radius of 1.5 mm.
The device for controlling the grinding deformation of the thin-wall hollow slender shaft can effectively support parts, so that the integral rigidity of the parts is enhanced, the deformation of the thin-wall part of the parts during clamping and grinding of a grinding machine is effectively controlled, the grinding parameters can be improved, the working hours required by grinding are greatly reduced, and the production efficiency is greatly improved. In addition, the risk of separation of the connection positions of the sealing rings is effectively controlled.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein the content of the first and second substances,
FIG. 1 is a schematic cross-sectional structural view of a thin-walled hollow slender shaft part for an aircraft engine;
FIG. 2 is a schematic diagram of the use of a device for controlling the grinding deformation of a thin-walled hollow elongate shaft according to an embodiment of the invention;
FIG. 3 is a schematic structural view of the mandrel of FIG. 2;
FIG. 4 is a schematic perspective view of the first blade portion and a portion of the second blade portion of FIG. 3;
FIG. 5 is a schematic view of the half-section structure of FIG. 4;
FIG. 6 is a schematic structural diagram of the first rubber strip of FIG. 2;
FIG. 7 is a schematic structural diagram of the second rubber strip (third rubber strip) in FIG. 2;
FIG. 8 is a schematic perspective view of the handle of FIG. 2;
fig. 9 is a schematic view of a partial cross-sectional structure of the first spiral groove of fig. 3 in a cross-sectional direction of an axis of the spiral direction.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings. Wherein like parts are given like reference numerals.
FIG. 1 is a schematic cross-sectional structural view of a thin-walled hollow slender shaft part for an aircraft engine; FIG. 2 is a schematic diagram of the use of a device for controlling the grinding deformation of a thin-walled hollow elongate shaft according to an embodiment of the invention; FIG. 3 is a schematic structural view of the mandrel of FIG. 2; FIG. 4 is a schematic perspective view of the first blade portion and a portion of the second blade portion of FIG. 3; FIG. 5 is a schematic view of the half-section structure of FIG. 4; FIG. 6 is a schematic structural diagram of a first rubber strip; FIG. 7 is a schematic structural diagram of a second rubber strip (a third rubber strip); FIG. 8 is a schematic perspective view of the handle of FIG. 2; fig. 9 is a schematic view of a partial cross-sectional structure of the first spiral groove of fig. 3 in a cross-sectional direction of an axis of the spiral direction. As shown with reference to figures 1-9,
the invention provides a device for controlling grinding deformation of a thin-wall hollow slender shaft, wherein a thin-wall hollow slender shaft part 1 comprises a shaft body 11 with the wall thickness of 0.5mm, five
The
the diameter of the first rod part 21 is 1.8mm smaller than that of the
the diameter ratio of second barrel portion 22 the diameter of the hole of axle body 11 is 2mm less, and length L9 ratio the hole of axle body 11 remove with behind the connection position of first
The diameter of the third barrel 23 is 2mm smaller than that of the
The first rubber strip 3 is sleeved on the first rod-shaped part 21, the
the first rubber strip 3 is provided with a cross part 31, a first annular part 32, a second annular part 33 and a first communication part 34 which are connected with each other corresponding to the first groove 211, the first ring groove 221, the second ring groove 222 and the first communication groove 223 respectively, the length dimension of each part of the first rubber strip 3 is 1-2mm smaller than that of the corresponding groove respectively,
the
The
The rigidity of the thin-wall hollow slender shaft part 1 is improved by inserting the through
The
the first rubber strip 3, the
Referring to fig. 9, in fig. 9, a schematic cross-sectional structure of the
The section radius of the second rubber strip 4 (i.e. the radius R1 of the connecting rubber strip 41) may be set to 1.5mm, so that after the connecting
Similarly, the dimension relationship between the
The diameter of the first shaft part 21 is 1.8mm smaller than the diameter of the
The length L8 of first shaft part 21 is 1.5mm longer than the length L3 of
The
In order to facilitate the evacuation of the air from the cavity during the insertion of the
For the
Similarly, for the
The first rubber strip 3, the
The diameter of the second shaft portion 22 is 2mm smaller than the diameter of the inner bore of the shaft body 11, and the length L9 is 1mm longer than the sum L6 of the length of the
The diameter of the third barrel 23 is 2mm smaller than the diameter of the
Through the
After the
When the technical scheme of the invention is applied, certain processing is usually required to be performed on the ejector pins of the grinding machine, for example, the standard ejector pins are subjected to tip removing operation, so that when the ejector pins at two ends clamp the
The handle portion of the
If the
Likewise, for the second spiral groove 231, the inclination angle may also be set to 30 °.
The device for controlling the grinding deformation of the thin-wall hollow slender shaft can effectively support parts, so that the integral rigidity of the parts is enhanced, the deformation of the thin-wall part of the parts during clamping and grinding of a grinding machine is effectively controlled, the grinding parameters can be improved, the working hours required by grinding are greatly reduced, and the production efficiency is greatly improved. In addition, the risk of separation of the connection positions of the sealing rings is effectively controlled.
It should be appreciated by those of skill in the art that while the present invention has been described in terms of several embodiments, not every embodiment includes only a single embodiment. The description is given for clearness of understanding only, and it is to be understood that all matters in the embodiments are to be interpreted as including technical equivalents which are related to the embodiments and which are combined with each other to illustrate the scope of the present invention.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent alterations, modifications and combinations can be made by those skilled in the art without departing from the spirit and principles of the invention.
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