CN112975508A - Machining clamp and machining method for thin-wall shell part - Google Patents
Machining clamp and machining method for thin-wall shell part Download PDFInfo
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- CN112975508A CN112975508A CN202110327366.XA CN202110327366A CN112975508A CN 112975508 A CN112975508 A CN 112975508A CN 202110327366 A CN202110327366 A CN 202110327366A CN 112975508 A CN112975508 A CN 112975508A
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- mandrel
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- outer circle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/12—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for securing to a spindle in general
- B23Q3/14—Mandrels in general
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q2703/00—Work clamping
- B23Q2703/02—Work clamping means
- B23Q2703/10—Devices for clamping workpieces of a particular form or made from a particular material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
Abstract
A thin-wall shell processing clamp and a processing method, the clamp mainly comprises a mandrel, the mandrel comprises a first mandrel, a second mandrel and a rectangular key, the first mandrel and the second mandrel are detachably connected through a thread, the rectangular key 3 is fixedly connected on the surface of the outer circle of the first mandrel, the processing method can efficiently finish the processing of the parts with high quality, the finish machining of an inner step hole is finished at one time, the finish machining of the outer circle, a key groove and a radial mounting hole is finished at one time, the size precision and the form and position error are effectively ensured, and the outer circle, the key groove, a gap and the radial mounting hole are simultaneously positioned and clamped by the mandrel during the finish machining, so that the rigidity of a processing technology system is improved, the flutter is avoided, the processing deformation is prevented, in addition, the processing flow of the method is compact, the production efficiency is high, the size precision and the form and position error, and the heat treatment process is not needed, and the production cost is low.
Description
Technical Field
The invention belongs to the technical field of machining, and particularly relates to a machining clamp and a machining method for a thin-wall shell part.
Background
The thin-wall shell part has large available space inside, good rigidity, light weight and compact structure, and is widely applied to the fields of aviation, aerospace, chemical industry and the like. However, the wall thickness is thin, so that the clamping and positioning are not easy to perform during processing, and the removal allowance is large during processing, so that the deformation is easy to occur, and the dimensional accuracy and the form and position error are not easy to guarantee. As shown in fig. 2-5, the thin-walled housing part is made of stainless steel 2Cr13, is a hollow cylindrical part, is provided with a stepped inner hole, has a minimum wall thickness of 1.4mm, is provided with a key groove and a mounting hole on the surface of an outer circle, and has high dimensional accuracy and small form and position tolerance of the inner hole, the outer circle and the key groove.
At present, for the parts, a machining method of roughly turning an excircle, roughly boring an inner hole, finely turning the excircle, finely boring the inner hole, milling a key groove, drilling an excircle radial hole and milling a notch by adopting a five-axis machining center is often adopted, and the machining method is poor in concentricity of the inner hole and the excircle and inconsistent in excircle cylindricity due to the fact that the parts are thin in wall and easy to vibrate, and deformation of the parts can be further increased due to hollowness when the key groove and the excircle radial hole are machined. In order to solve the deformation, the heat treatment process is often increased, which results in longer processing period and increased cost.
Disclosure of Invention
In order to solve the defects, the invention provides the machining clamp and the machining method for the thin-wall shell part, which can efficiently finish machining of the thin-wall shell part with high quality, have compact machining process and high production efficiency, can ensure dimensional accuracy and form and position errors, have good part consistency, are convenient, stable and reliable to operate, do not need a heat treatment process and have low production cost.
The invention is realized by the following technical scheme.
The invention provides a machining clamp for a thin-wall shell part, which comprises a mandrel, wherein the mandrel comprises a first mandrel, a second mandrel and a rectangular key; the rectangular key is fixedly connected to the outer circle surface of the first mandrel;
the first mandrel comprises a first positioning column and a first mounting column, an internal threaded hole is formed in the center of the left end face of the first positioning column, the first mounting column is arranged on the right end face of the first positioning column, the diameter of the outer circle of the first positioning column is matched with the diameter of the inner hole of the right end of the part, and the internal threaded hole, the first positioning column and the first mounting column are coaxial;
the second mandrel comprises a second positioning column, a second tight top column and a connecting column, the left end face of the second positioning column is provided with the second tight top column, the end face of the second tight top column is provided with a tip hole, the right end face of the second positioning column is provided with the connecting column, the connecting column is an external thread, the diameter of the connecting column is smaller than the diameter of a small section of inner hole in the middle of the part, the external thread is matched with the internal thread hole of the first mandrel, and the diameter of the second positioning column is matched with the diameter of the inner hole;
when the clamping device is used, the clamping jaw of the machine tool clamps the first mounting column of the first mandrel, and the center of the machine tool tightly props against the center hole in the second tight propping column of the second mandrel.
A method for processing a thin-wall shell part by using the clamp comprises the following steps:
s10, blanking, and sawing a stainless steel bar stock by using a sawing machine, wherein the size of the stainless steel bar stock is phi 85mm multiplied by 112 mm;
s20, performing rough machining by ordinary turning, clamping the outer circle of the blank by a clamping jaw, turning the outer circle after rough turning of the end face, and turning the length size of 30-50 mm;
s21, turning around, clamping the machined excircle by a clamping jaw, roughly turning the end face and ensuring that the total length dimension is 110 mm; roughly turning the outer circle of an unprocessed blank;
s30, turning and milling the center for finish machining, clamping the machined excircle by the clamping jaws, finish turning the end face, milling the machined key groove by using an end mill, then finish boring the inner hole, and finishing the finish boring machining of the step inner hole of the whole part by one-time clamping;
s31, turning around, installing a clamp, enabling a jaw to clamp a first installation column of a first mandrel, sleeving a part, enabling the excircle of a first positioning column of the first mandrel to be matched with the inner hole at the right end of the part, enabling the end face of the front end of the first positioning column to be tightly attached to the step face at the bottom of the inner hole, enabling a rectangular key to slide into a key groove of the part, and enabling the upper plane of the rectangular key to be lower than the surface of the excircle of the part; inserting a second mandrel into an inner hole of the part to enable the second mandrel to be matched with the inner hole at the left end of the part, enabling a connecting column of the second mandrel to penetrate through a small section of inner hole at the middle position of the part and to be screwed into the inner threaded hole of the first mandrel, enabling the end face of the right end of a second positioning column of the second mandrel to be tightly attached to the step face at the bottom of the inner hole at the left end of the part, and finally enabling the center of a machine tool to be abutted against a center hole at the end face;
s32, finely turning the outer circle to enable the diameter of the outer circle to meet the requirements of the part;
and S33, milling notches according to design requirements, drilling radial holes according to the design requirements, and then reaming to finish machining.
Further, when blanking is performed in step S10, the material of the stainless steel bar stock used is 2Cr 13.
Further, in the step S20, when the outer circle is rough, the diameter of the outer circle is set to have a single-side margin of 1.5mm, so that the diameter of the rough is set to be equal to 83 mm.
Further, in the step S21, a single-side margin is left for the outer circle diameter of 1.5mm, and the diameter size is equal to 83 mm.
Further, in the step S30, the diameter of the end mill used is phi 2.
Further, in the steps S20 and S21, when the facing roughing is performed, the turning amount of 1mm is performed on one facing in each of the two steps.
Further, in step S30, when finishing the end faces, a material is removed from each end face by 1mm, so that the part has a designed length.
The invention has the beneficial effects that: by implementing the invention, the machining clamp and the machining method for the thin-wall shell can efficiently finish the machining of the parts with high quality, finish machining of the internal stepped hole is finished at one time, finish machining of the excircle, the key groove and the radial mounting hole is finished by taking the inner hole as a reference and clamping at one time, and the dimensional precision and the form and position error are effectively ensured. In addition, the excircle, the key slot, the notch and the radial mounting hole are precisely machined and are positioned and clamped by the mandrel, the rigidity of a machining process system is improved, chatter is avoided, machining deformation is prevented, meanwhile, the method is compact in machining process, high in production efficiency, capable of guaranteeing dimensional accuracy and form and position errors, good in part consistency, convenient to operate, stable and reliable, free of heat treatment procedures and low in production cost.
Drawings
FIG. 1 is a schematic view of a clamp structure;
figure 2 is a front view of the housing parts,
FIG. 3 is a top view of FIG. 2;
FIG. 4 is a cross-sectional view A-A of FIG. 2;
FIG. 5 is a schematic three-dimensional structure of the housing;
in the figure: 1-a first mandrel, 11-a first positioning column, 12-a first mounting column, 2-a second mandrel, 21-a second positioning column, 22-a second tightening top column, 23-a connecting column and 3-a rectangular key.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
As shown in fig. 1, a machining fixture for a thin-walled shell part comprises a mandrel, wherein the mandrel comprises a first mandrel 1, a second mandrel 2 and a rectangular key 3; the rectangular key 3 is fixedly connected to the outer circle surface of the first mandrel;
the first mandrel 1 comprises a first positioning column 11 and a first mounting column 12, an internal threaded hole is formed in the center of the left end face of the first positioning column 11, the first mounting column 12 is arranged on the right end face of the first positioning column 11, the diameter of the outer circle of the first positioning column 11 is matched with the diameter of the inner hole in the right end of a part, and the internal threaded hole, the first positioning column 11 and the first mounting column 12 are coaxial;
the second mandrel 2 comprises a second positioning column 21, a second tight supporting column 22 and a connecting column 23, the second tight supporting column 22 is arranged on the left end face of the second positioning column 21, a tip hole is formed in the end face of the second tight supporting column 22, the connecting column 23 is arranged on the right end face of the second positioning column 21, the connecting column 23 is an external thread, the diameter of the connecting column 23 is smaller than the diameter of the inner hole of the small section in the middle of the part, the external thread is matched with the internal thread hole of the first mandrel 1, and the diameter of the second positioning column 21 is matched with the diameter of;
when the clamping jaw is used, the clamping jaw of the machine tool clamps the first mounting column 12 of the first mandrel 1, and the center of the machine tool tightly pushes against a center hole on the second tight ejection column 22 of the second mandrel 2.
The specific processing method comprises the following steps:
the method comprises the following steps: blanking, and sawing a stainless steel bar material 2Cr13 with the size of phi 85mm multiplied by 112mm by a sawing machine.
Step two: rough machining of a common vehicle:
1. the clamping jaws clamp the outer circle of the blank, the end face is roughly turned, and the blank can be obtained after light is emitted, the single-side allowance of the outer circle is 1.5mm, the diameter size is phi 83mm, and the turning length size is 30-50 mm.
2. Turning around, clamping the machined excircle by a clamping jaw, roughly turning the end face, and ensuring that the total length dimension is 110mm (the two end faces are respectively provided with 1mm allowance); roughly turning the outer circle of an unprocessed blank, wherein the diameter of the outer circle is left with a single-side allowance of 1.5mm, and the diameter size reaches phi 83 mm.
Step three: finish machining of a turning and milling center:
3. clamping the machined excircle by the clamping jaws, finely turning the end face, removing 1mm of material, milling the key groove by using an end mill with the specification of phi 2, finely boring an inner hole, and finishing the finish boring of the whole step inner hole by one-step clamping.
4. Turning around and installing a clamp. Clamping a first mounting column 12 of a first mandrel 1 by a clamping jaw, sleeving a part, matching the excircle of a first positioning column 11 of the first mandrel 1 with the inner hole at the right end of the part, tightly attaching the front end face of the first positioning column 11 to the step face at the bottom of the inner hole, sliding a rectangular key 3 into a key groove of the part, and enabling the upper plane of the rectangular key 3 to be lower than the surface of the excircle of the part; inserting the second mandrel 2 into the inner hole of the part to enable the second mandrel 2 to be matched with the inner hole of the left end of the part, enabling the connecting column 23 of the second mandrel 2 to penetrate through a small section of inner hole in the middle of the part to be screwed into the inner threaded hole of the first mandrel 1, enabling the end face of the right end of the second positioning column 21 of the second mandrel 2 to be tightly attached to the step face of the bottom of the inner hole of the left end of the part, and finally enabling the center of a machine tool to abut against the center hole of the end face of the second tight supporting.
5. And (3) finely turning the outer circle to enable the diameter of the outer circle to meet the requirements of parts, milling a 40-degree notch, drilling a radial hole, and reaming the hole.
At this moment, the excircle, the step inner hole, the key slot and the radial mounting hole of the thin-wall shell part are all processed, and the finish machining of the inner step hole is completed at one time; the finish machining of the excircle, the key slot, the 40-degree notch and the radial mounting hole all uses an inner hole as a reference, and one-time clamping is completed, so that the size precision and the form and position error are effectively guaranteed. In addition, the excircle, the key groove, the 40-degree notch and the radial mounting hole are precisely machined and are positioned and clamped by the mandrel, so that the rigidity of a machining process system is improved, and the vibration is avoided.
Claims (8)
1. The utility model provides a add clamping apparatus for thin wall casing part which characterized in that: the device comprises a mandrel, wherein the mandrel comprises a first mandrel, a second mandrel and a rectangular key; the rectangular key is fixedly connected to the outer circle surface of the first mandrel;
the first mandrel comprises a first positioning column and a first mounting column, an internal threaded hole is formed in the center of the left end face of the first positioning column, the first mounting column is arranged on the right end face of the first positioning column, the diameter of the outer circle of the first positioning column is matched with the diameter of the inner hole of the right end of the part, and the internal threaded hole, the first positioning column and the first mounting column are coaxial;
the second mandrel comprises a second positioning column, a second tight top column and a connecting column, the left end face of the second positioning column is provided with the second tight top column, the end face of the second tight top column is provided with a tip hole, the right end face of the second positioning column is provided with the connecting column, the connecting column is an external thread, the diameter of the connecting column is smaller than the diameter of a small section of inner hole in the middle of the part, the external thread is matched with the internal thread hole of the first mandrel, and the diameter of the second positioning column is matched with the diameter of the inner hole;
when the clamping device is used, the clamping jaw of the machine tool clamps the first mounting column of the first mandrel, and the center of the machine tool tightly props against the center hole in the second tight propping column of the second mandrel.
2. A method for processing a thin-wall shell part by using the clamp is characterized by comprising the following steps:
s10, blanking, and sawing a stainless steel bar stock by using a sawing machine, wherein the size of the stainless steel bar stock is phi 85mm multiplied by 112 mm;
s20, performing rough machining by ordinary turning, clamping the outer circle of the blank by a clamping jaw, turning the outer circle after rough turning of the end face, and turning the length size of 30-50 mm;
s21, turning around, clamping the machined excircle by a clamping jaw, roughly turning the end face and ensuring that the total length dimension is 110 mm; roughly turning the outer circle of an unprocessed blank;
s30, turning and milling the center for finish machining, clamping the machined excircle by the clamping jaws, finish turning the end face, milling the machined key groove by using an end mill, then finish boring the inner hole, and finishing the finish boring machining of the step inner hole of the whole part by one-time clamping;
s31, turning around, installing a clamp, enabling a jaw to clamp a first installation column 12 of a first mandrel 1, sleeving a part, enabling the excircle of a first positioning column 11 of the first mandrel 1 to be matched with the inner hole at the right end of the part, enabling the front end face of the first positioning column 11 to be tightly attached to the step face at the bottom of the inner hole, enabling a rectangular key 3 to slide into a key groove of the part, and enabling the upper plane of the rectangular key 3 to be lower than the excircle surface of the part; inserting a second mandrel 2 into an inner hole of a part to enable the second mandrel 2 to be matched with the inner hole at the left end of the part, enabling a connecting column 23 of the second mandrel 2 to penetrate through a small section of inner hole at the middle position of the part and be screwed into the inner threaded hole of the first mandrel 1, enabling the end face of the right end of a second positioning column 21 of the second mandrel 2 to be tightly attached to the step face at the bottom of the inner hole at the left end of the part, and finally enabling a machine tool tip to be abutted against a tip hole at the end face of a second tightening top;
s32, finely turning the outer circle to enable the diameter of the outer circle to meet the requirements of the part;
and S33, milling notches according to design requirements, drilling radial holes according to the design requirements, and then reaming to finish machining.
3. A method of machining a thin-walled casing part as claimed in claim 2, wherein: in the step S10, when blanking is performed, the material of the stainless steel bar stock is 2Cr 13.
4. A method of machining a thin-walled casing part as claimed in claim 2, wherein: in the step S20, when the outer circle rough machining is performed, the diameter of the outer circle is set to have a single-side margin of 1.5mm, so that the diameter of the rough machining is set to be equal to 83 mm.
5. A method of machining a thin-walled casing part as claimed in claim 2, wherein: in the step S21, a single-sided margin of the outer circle diameter is 1.5mm, and the diameter size is equal to 83 mm.
6. A method of machining a thin-walled casing part as claimed in claim 2, wherein: in step S30, the end mill used has a diameter of phi 2.
7. A method of machining a thin-walled casing part as claimed in claim 2, wherein: in the steps S20 and S21, when the facing is rough, the turning amount of 1mm is performed in each of the two steps.
8. A method of machining a thin-walled casing part as claimed in claim 2, wherein: in step S30, when finishing the end faces, 1mm of material is removed from each end face to make the part have the designed length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110327366.XA CN112975508A (en) | 2021-03-26 | 2021-03-26 | Machining clamp and machining method for thin-wall shell part |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110327366.XA CN112975508A (en) | 2021-03-26 | 2021-03-26 | Machining clamp and machining method for thin-wall shell part |
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| CN112975508A true CN112975508A (en) | 2021-06-18 |
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| CN202110327366.XA Pending CN112975508A (en) | 2021-03-26 | 2021-03-26 | Machining clamp and machining method for thin-wall shell part |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113369502A (en) * | 2021-06-28 | 2021-09-10 | 成都飞机工业（集团）有限责任公司 | Turning method of ultrathin-wall bushing |
| CN113523718A (en) * | 2021-07-08 | 2021-10-22 | 哈尔滨电气动力装备有限公司 | Manufacturing process of nuclear main pump bearing guide ring key groove of nuclear power station |
| CN114083243A (en) * | 2021-12-06 | 2022-02-25 | 河北燕兴机械有限公司 | Thin-wall shell machining process |
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| CN207807185U (en) * | 2018-01-19 | 2018-09-04 | 铜陵市三圆特种铸造有限责任公司 | A kind of workpiece positional punch tooling |
| CN109396766A (en) * | 2018-11-30 | 2019-03-01 | 河南红宇精密机械有限公司 | A kind of thin-wall case processing technology |
| CN112247488A (en) * | 2020-10-14 | 2021-01-22 | 常州机电职业技术学院 | Process for ensuring precision of ring groove of disc seat sleeve nut |
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2021
- 2021-03-26 CN CN202110327366.XA patent/CN112975508A/en active Pending
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| CN102922234A (en) * | 2012-10-31 | 2013-02-13 | 贵州航飞精密制造有限公司 | Process for processing external threads of thin-wall threaded sleeve and threaded sleeve turning clamp used for same |
| KR101712769B1 (en) * | 2016-03-15 | 2017-03-06 | 한구일 | A suction nut and mould of power sprayer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113369502A (en) * | 2021-06-28 | 2021-09-10 | 成都飞机工业（集团）有限责任公司 | Turning method of ultrathin-wall bushing |
| CN113369502B (en) * | 2021-06-28 | 2022-05-06 | 成都飞机工业（集团）有限责任公司 | Turning method of ultrathin-wall bushing |
| CN113523718A (en) * | 2021-07-08 | 2021-10-22 | 哈尔滨电气动力装备有限公司 | Manufacturing process of nuclear main pump bearing guide ring key groove of nuclear power station |
| CN114083243A (en) * | 2021-12-06 | 2022-02-25 | 河北燕兴机械有限公司 | Thin-wall shell machining process |
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Application publication date: 20210618 |
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