CN110091252B - Mandrel for grinding end face cover plate and processing method of end face cover plate - Google Patents

Mandrel for grinding end face cover plate and processing method of end face cover plate Download PDF

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Publication number
CN110091252B
CN110091252B CN201910379614.8A CN201910379614A CN110091252B CN 110091252 B CN110091252 B CN 110091252B CN 201910379614 A CN201910379614 A CN 201910379614A CN 110091252 B CN110091252 B CN 110091252B
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China
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cylinder
hole
cover plate
plane
blank
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CN110091252A (en
Inventor
魏成双
席忠斌
李辉
孙盛丽
刘剑
姜秀英
岳云淼
叶云青
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Harbin Turbine Co Ltd
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Harbin Turbine Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00Component parts such as frames, beds, carriages, headstocks
    • B24B41/06Work supports, e.g. adjustable steadies

Abstract

A mandrel for grinding an end face cover plate and a processing method of the end face cover plate relate to the field of machining. The end cover plate processed by the turning processing mode has poor coaxial precision of an excircle and an inner hole. The end face cover plate processing steps are as follows: clamping the blank on a horizontal lathe, roughly turning the outer circular surfaces, the end surfaces and the inner holes of the three cylinders, and reserving machining allowance of 3 mm; tempering the blank to HRC 31-35; finely turning the outer circular surfaces, end surfaces and inner holes of the three cylinders, respectively reserving machining allowance of 0.5-0.6mm on the outer circular surfaces of the second cylinder and the third cylinder, and turning other surfaces accurately; the mandrel is fixed in the inner hole of the blank, and the outer circular surfaces of the second cylinder and the third cylinder of the end face cover plate are finely ground by using a grinding machine to be processed to a standard size; respectively scribing outline lines of a first plane and a second plane on the outer end face of the first cylinder; cutting a first plane and a second plane by using a linear cutting machine; 5 circular holes were scribed on the outer end face of the first cylinder. The invention is used for processing the end cover plate.

Description

Mandrel for grinding end face cover plate and processing method of end face cover plate
Technical Field
The invention relates to the field of machining, in particular to a mandrel for grinding an end face cover plate and a machining method of the end face cover plate.
Background
The end cover plate is a positioning part, the outer circle and the inner hole of the end cover plate have coaxial precision requirements, the prior turning processing mode is adopted, the roughness is not ideal enough, and the coaxial precision of the outer circle and the inner hole is poor, so the core shaft for grinding the end cover plate and the processing method thereof are developed.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the end cover plate processed by the turning processing mode has poor coaxial precision of an outer circle and an inner hole, and further provides a mandrel for grinding the end cover plate and a processing method of the end cover plate.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a mandrel for grinding an end face cover plate comprises a locking portion 10-1 and a positioning portion 10-2, wherein the locking portion 10-1 is arranged on the end face of the front end of the positioning portion 10-2, the front end of the locking portion 10-1 is provided with an external thread, and the front end of the positioning portion 10-2 is provided with a conical surface.
Further, the taper of the conical surface at the front end of the positioning part 10-2 is 1: 3000.
The end face cover plate is formed by sequentially connecting three cylinders with sequentially decreasing outer diameters, the three cylinders are coaxially and integrally arranged, the three cylinders are respectively a first cylinder 1, a second cylinder 2 and a third cylinder 3, a first inner hole 4 is formed in the middle of the end face of the first cylinder 1, a second inner hole 5 is formed in the middle of the end face of the second cylinder 2, a third inner hole 6 is formed in the middle of the end face of the third cylinder 3, the inner diameter of the first inner hole 4 is smaller than that of the second inner hole 5 and that of the third inner hole 6, and the inner diameter of the second inner hole 5 is larger than that of the third inner hole 6; the outer circumferential side wall of the first cylinder 1 is respectively provided with a first plane 7 and a second plane 8, and the first plane 7 and the second plane 8 are arranged in an intersecting manner; five circular holes 1-1 are uniformly distributed on the end surface of the first cylinder 1 along the circumferential direction;
the end face cover plate comprises the following specific processing steps:
step one, forging a blank to be processed;
step two, rough machining of the blank: clamping a blank on a clamp of a horizontal lathe, clamping a cutter on a tool row of the lathe, roughly turning the outer circular surfaces and the end surfaces of a first cylinder 1, a second cylinder 2 and a third cylinder 3, as well as a first inner hole 4, a second inner hole 5 and a third inner hole 6, and reserving machining allowance of 3mm during rough machining;
step three, heat treatment: tempering the blank to HRC 31-35;
step four, performing primary finish machining on the blank: aligning by taking the axis of the blank as a reference, and finely turning the outer circular surfaces and the end surfaces of the first cylinder 1, the second cylinder 2 and the third cylinder 3, as well as a first inner hole 4, a second inner hole 5 and a third inner hole 6 respectively, wherein machining allowance of 0.5-0.6mm is reserved on the outer circular surfaces of the second cylinder 2 and the third cylinder 3 respectively, and other surfaces are finely turned to standard sizes according to a drawing;
step five, finish machining the blank: the mandrel 10 is inserted into the inner hole of the blank from the side of the third inner hole 6, the conical surface at the front end of the positioning part 10-2 is positioned in the third inner hole 6, the threaded end of the locking part 10-1 extends out of the first inner hole 4, the threaded end of the locking part 10-1 is screwed on the threaded end of the locking part 10-1 through the hexagon nut 9, the end surface cover plate and the mandrel 10 are fastened together, the mandrel and the blank are fixed on a workbench of a grinding machine, the mandrel is aligned by taking the axis of the mandrel as a reference, and the outer circular surfaces of the second cylinder 2 and the third cylinder 3 of the end surface cover plate are accurately ground by the grinding machine to be processed;
step six, bench worker: respectively scribing outline lines of a first plane 7 and a second plane 8 on the outer end face of the first cylinder 1;
step seven, cutting: fixedly mounting the end face cover plate on a linear cutting machine, and cutting a first plane 7 and a second plane 8 by using the linear cutting machine;
step eight, bench worker: 5 round holes 1-1 are scribed on the outer end face of the first cylinder 1, and sharp edges of each round hole 1-1 are blunted.
Furthermore, the included angle a between the connecting lines between the central points of the two adjacent circular holes 1-1 and the central point of the first inner hole 4 is 60 degrees.
Further, the angle b between the outline of the second plane 8 and the diameter of the intersection of the first plane 7 and the second plane 8 is 55 °.
The invention has the beneficial effects that:
aiming at the structural characteristics and the processing condition of the end face cover plate component, the developed special core shaft is positioned on the inner hole to grind the excircle, so that the processing precision of the inner hole excircle is improved, and the coaxiality of the inner hole and the excircle of the end face cover plate reaches 0.01 mm.
Drawings
FIG. 1 is a cross-sectional view of an end cover plate;
FIG. 2 is a front view of the end cover plate;
FIG. 3 is a schematic structural diagram of a mandrel insertion end cover plate;
fig. 4 is a schematic structural view of the mandrel.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings:
the first embodiment is as follows: as shown in fig. 4, the mandrel for grinding an end surface cover plate according to the present embodiment includes a locking portion 10-1 and a positioning portion 10-2, the locking portion 10-1 is disposed at a front end surface of the positioning portion 10-2, a front end of the locking portion 10-1 has an external thread, and a front end of the positioning portion 10-2 has a conical surface.
The second embodiment is as follows: the taper of the conical surface at the front end of the positioning part 10-2 in the embodiment is 1: 3000.
Other components and connection modes are the same as those of the first embodiment.
The third concrete implementation mode: as shown in fig. 1 to 3, the end cover plate of the present embodiment is formed by sequentially connecting three cylinders with sequentially decreasing outer diameters, the three cylinders are coaxially and integrally disposed, the three cylinders are respectively a first cylinder 1, a second cylinder 2 and a third cylinder 3, the outer diameter of the first cylinder 1 is 110mm, the outer diameter of the second cylinder 2 is 70mm, the outer diameter of the third cylinder 3 is 50mm, a first inner hole 4 is formed in the middle of the end face of the first cylinder 1, the aperture of the first inner hole 4 is 15mm, a second inner hole 5 is formed in the middle of the end face of the second cylinder 2, the aperture of the second inner hole 5 is 25mm, a third inner hole 6 is formed in the middle of the end face of the third cylinder 3, the aperture of the third inner hole 6 is 22mm, the inner diameter of the first inner hole 4 is smaller than the inner diameters of the second inner hole 5 and the third inner hole 6, and the inner diameter of the second inner hole 5 is larger than the inner diameter of the third inner hole 6; a first plane 7 and a second plane 8 are respectively cut on the side wall of the outer circumference of the first cylinder 1, and the first plane 7 and the second plane 8 are arranged in an intersecting way; five round holes 1-1 are uniformly distributed on the end surface of the first cylinder 1 along the circumferential direction, and the aperture of each round hole is 11 mm;
the end face cover plate comprises the following specific processing steps:
step one, forging a blank to be processed;
step two, rough machining of the blank: clamping a blank on a clamp of a horizontal lathe, clamping a cutter on a tool row of the lathe, roughly turning the outer circular surfaces and the end surfaces of a first cylinder 1, a second cylinder 2 and a third cylinder 3, as well as a first inner hole 4, a second inner hole 5 and a third inner hole 6, and reserving machining allowance of 3mm during rough machining;
step three, heat treatment: tempering the blank to HRC 31-35;
step four, performing primary finish machining on the blank: aligning by taking the axis of the blank as a reference, and finely turning the outer circular surfaces and the end surfaces of the first cylinder 1, the second cylinder 2 and the third cylinder 3, as well as a first inner hole 4, a second inner hole 5 and a third inner hole 6 respectively, wherein machining allowance of 0.5-0.6mm is reserved on the outer circular surfaces of the second cylinder 2 and the third cylinder 3 respectively, and other surfaces are finely turned to standard sizes according to a drawing;
step five, finish machining the blank: the mandrel 10 is inserted into the inner hole of the blank from the side of the third inner hole 6, the conical surface at the front end of the positioning part 10-2 is positioned in the third inner hole 6, the threaded end of the locking part 10-1 extends out of the first inner hole 4, the threaded end of the locking part 10-1 is screwed on the threaded end of the locking part 10-1 through the hexagon nut 9, the end surface cover plate and the mandrel 10 are fastened together, the mandrel and the blank are fixed on a workbench of a grinding machine, the mandrel is aligned by taking the axis of the mandrel as a reference, and the outer circular surfaces of the second cylinder 2 and the third cylinder 3 of the end surface cover plate are accurately ground by the grinding machine to be processed;
step six, bench worker: respectively drawing outline lines of a first plane 7 and a second plane 8 on the outer end face of the first cylinder 1, wherein the farthest distance from the first plane 7 to the outer circumferential surface of the first cylinder 1 is 104 mm;
step seven, cutting: fixedly mounting the end face cover plate on a linear cutting machine, and cutting a first plane 7 and a second plane 8 by using the linear cutting machine;
step eight, bench worker: 5 circular holes 1-1 are drilled on the outer end face of the first cylinder 1, sharp edges of the circular holes 1-1 are blunted, drawing numbers are printed, and the end face cover plate is machined.
The other components and the connection mode are the same as those of the second embodiment.
The fourth concrete implementation mode: as shown in fig. 2, in the present embodiment, an angle a between a connecting line between a central point of each of two adjacent circular holes 1-1 and a central point of the first inner hole 4 is 60 °.
Other components and connection modes are the same as those of the third embodiment.
The fifth concrete implementation mode: as shown in fig. 2, in the present embodiment, the angle b between the outline of the second plane 8 and the diameter of the intersection of the first plane 7 and the second plane 8 is 55 °.
Other components and connection modes are the same as those of the third embodiment.

Claims (3)

1. A method for processing an end cover plate by a mandrel for grinding the end cover plate,
the mandrel for grinding the end face cover plate comprises a locking part (10-1) and a positioning part (10-2), wherein the locking part (10-1) is arranged at the front end face of the positioning part (10-2), the front end of the locking part (10-1) is provided with an external thread, the front end of the positioning part (10-2) is provided with a conical surface, and the conicity of the conical surface at the front end of the positioning part (10-2) is 1: 3000;
the end face cover plate is formed by sequentially connecting three cylinders with sequentially decreasing outer diameters, the three cylinders are coaxially and integrally arranged, the three cylinders are respectively a first cylinder (1), a second cylinder (2) and a third cylinder (3), a first inner hole (4) is formed in the middle of the end face of the first cylinder (1), a second inner hole (5) is formed in the middle of the end face of the second cylinder (2), a third inner hole (6) is formed in the middle of the end face of the third cylinder (3), the inner diameter of the first inner hole (4) is smaller than the inner diameters of the second inner hole (5) and the third inner hole (6), and the inner diameter of the second inner hole (5) is larger than the inner diameter of the third inner hole (6); a first plane (7) and a second plane (8) are respectively arranged on the side wall of the outer circumference of the first cylinder (1), and the first plane (7) and the second plane (8) are arranged in an intersecting manner; five round holes (1-1) are uniformly distributed on the end surface of the first cylinder (1) along the circumferential direction;
the method is characterized in that: the end face cover plate comprises the following specific processing steps:
step one, forging a blank to be processed;
step two, rough machining of the blank: clamping a blank on a clamp of a horizontal lathe, clamping a cutter on a tool row of the lathe, roughly turning the outer circular surfaces and the end surfaces of a first cylinder (1), a second cylinder (2) and a third cylinder (3), as well as a first inner hole (4), a second inner hole (5) and a third inner hole (6), and reserving machining allowance of 3mm during rough machining;
step three, heat treatment: tempering the blank to HRC 31-35;
step four, performing primary finish machining on the blank: aligning by taking the axis of the blank as a reference, and finely turning the outer circular surfaces and the end surfaces of the first cylinder (1), the second cylinder (2) and the third cylinder (3), as well as the first inner hole (4), the second inner hole (5) and the third inner hole (6), wherein machining allowance of 0.5-0.6mm is reserved on the outer circular surfaces of the second cylinder (2) and the third cylinder (3), and other surfaces are finely turned to standard sizes according to a drawing;
step five, finish machining the blank: the mandrel (10) is inserted into the inner hole of the blank from the side of the third inner hole (6), the conical surface at the front end of the positioning part (10-2) is positioned in the third inner hole (6), the threaded end of the locking part (10-1) extends out of the first inner hole (4), the threaded end of the locking part (10-1) is screwed on the threaded end of the locking part (10-1) through a hexagonal nut (9), the end surface cover plate and the mandrel (10) are fastened together, the mandrel and the blank are fixed on a workbench of a grinding machine, alignment is carried out by taking the axis of the mandrel as a reference, and the second cylinder (2) and the outer circular surface of the third cylinder (3) of the end surface cover plate of the grinding machine are finely ground to be processed;
step six, bench worker: respectively scribing outline lines of a first plane (7) and a second plane (8) on the outer end face of the first cylinder (1);
step seven, cutting: fixedly mounting the end face cover plate on a linear cutting machine, and cutting a first plane (7) and a second plane (8) by using the linear cutting machine;
step eight, bench worker: 5 round holes (1-1) are drilled on the outer end face of the first cylinder (1), and sharp edges of each round hole (1-1) are blunt.
2. The method for machining an end cover plate by using the mandrel for grinding the end cover plate as claimed in claim 1, wherein: the included angle (a) between the connecting line of the central points of the two adjacent round holes (1-1) and the central point of the first inner hole (4) is 60 degrees.
3. The method for machining an end cover plate by using the mandrel for grinding the end cover plate as claimed in claim 1, wherein: the angle (b) between the outline of the second plane (8) and the diameter of the intersection of the first plane (7) and the second plane (8) is 55 deg.
CN201910379614.8A 2019-05-08 2019-05-08 Mandrel for grinding end face cover plate and processing method of end face cover plate Active CN110091252B (en)

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CN110091252B true CN110091252B (en) 2020-12-18

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110653873A (en) * 2019-09-09 2020-01-07 昆山佳腾光电塑胶有限公司 Method for machining hexagonal square hole of plastic product by using hexagonal cutter
CN111941014A (en) * 2020-08-21 2020-11-17 重庆川仪调节阀有限公司 Machining method of valve seat component
CN111975302B (en) * 2020-08-26 2021-10-26 重庆川仪调节阀有限公司 Machining method based on sleeve type valve plug part

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Publication number Priority date Publication date Assignee Title
SU1115860A1 (en) * 1980-07-30 1984-09-30 Turkov Sergej V Method of fitting races
CN102672425A (en) * 2012-04-28 2012-09-19 重庆市江津区宏盛机械制造有限公司 Processing technology of turntable
CN203045521U (en) * 2013-01-10 2013-07-10 哈尔滨飞机工业集团有限责任公司 Cylinder part external grinding jig
CN103341735A (en) * 2013-07-09 2013-10-09 中联重科股份有限公司 Hollow shaft and manufacturing method thereof
CN103600208A (en) * 2013-11-26 2014-02-26 靖江市华强重工设备制造有限公司 Method for machining roll shafts of full-automatic melting-free lead ingot granulators

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US7748718B2 (en) * 2005-06-20 2010-07-06 The Gleason Works Expanable mandrel

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1115860A1 (en) * 1980-07-30 1984-09-30 Turkov Sergej V Method of fitting races
CN102672425A (en) * 2012-04-28 2012-09-19 重庆市江津区宏盛机械制造有限公司 Processing technology of turntable
CN203045521U (en) * 2013-01-10 2013-07-10 哈尔滨飞机工业集团有限责任公司 Cylinder part external grinding jig
CN103341735A (en) * 2013-07-09 2013-10-09 中联重科股份有限公司 Hollow shaft and manufacturing method thereof
CN103600208A (en) * 2013-11-26 2014-02-26 靖江市华强重工设备制造有限公司 Method for machining roll shafts of full-automatic melting-free lead ingot granulators

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