CN113829136B - Machining method suitable for hollow thin-wall gear shaft - Google Patents

Machining method suitable for hollow thin-wall gear shaft Download PDF

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Publication number
CN113829136B
CN113829136B CN202111256996.9A CN202111256996A CN113829136B CN 113829136 B CN113829136 B CN 113829136B CN 202111256996 A CN202111256996 A CN 202111256996A CN 113829136 B CN113829136 B CN 113829136B
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grinding
inner hole
hollow thin
gear shaft
wall
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CN113829136A (en
Inventor
刘芳雪
王福生
李代瀛
邓昌峻
肖建锋
杨超
彭加亮
郑建彬
叶爽
刘昌全
姜汝海
吴恒
�田�浩
李靖
周浩
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Chengdu Qingshan Industry Co ltd
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Chengdu Qingshan Industry Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00—Other grinding machines or devices
    • B24B27/0076—Other grinding machines or devices grinding machines comprising two or more grinding tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/06—Work supports, e.g. adjustable steadies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
    • B24B5/04—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces externally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/36—Single-purpose machines or devices
    • B24B5/48—Single-purpose machines or devices for grinding walls of very fine holes, e.g. in drawing-dies

Abstract

The invention provides a processing method suitable for a hollow thin-wall gear shaft, which can ensure the production quality of the hollow thin-wall gear shaft and improve the processing efficiency, wherein the hollow thin-wall gear shaft comprises a first inner hole, a third inner hole and a second inner hole which are sequentially arranged from a large end part to a small end part, the outer wall of the hollow thin-wall gear shaft is provided with 1 first excircle and 2 second excircles, and the first excircle and the second excircle are positioned between the third inner hole and the second inner hole, the processing method comprises the following steps: clamping, namely clamping the large end part and the small end part of the hollow thin-wall gear shaft by adopting a clamping piece; and grinding, namely grinding the first outer circle and the second outer circle by adopting a combined type forming CBN grinding wheel, grinding the first inner hole by adopting an umbrella-shaped CBN grinding wheel, grinding the second inner hole by adopting a first columnar CBN grinding wheel, and grinding the third inner hole by adopting a second columnar CBN grinding wheel.

Description

Machining method suitable for hollow thin-wall gear shaft
Technical Field
The invention relates to the field of automobile part machining, in particular to a machining method suitable for a hollow thin-wall gear shaft.
Background
The hollow thin-wall gear shaft used in the field of DCT double-clutch automobiles has the characteristics of complex structure and large heat treatment deformation, and the coaxiality precision requirements of a plurality of parts such as a stepped inner hole, a stepped outer circle and the like of a hollow part are all within 0.015mm due to high assembly precision requirements.
At present, most parts of the parts are machined by using a common grinding machine or a turning and grinding center, and different parts meet the requirement of coaxiality of a plurality of parts through converting references.
Disclosure of Invention
The invention aims to provide a processing method suitable for a hollow thin-wall gear shaft, which can ensure the production quality of the hollow thin-wall gear shaft and improve the processing efficiency.
The embodiment of the invention is realized by the following steps:
the utility model provides a processing method suitable for hollow thin wall pinion, hollow thin wall pinion includes first hole, third hole and the second hole that sets gradually from big tip to little tip, and the outer wall of hollow thin wall pinion is provided with 1 first excircle and 2 second excircles, and first excircle and second excircle are located between third hole and the second hole, and this processing method includes: clamping, namely clamping the large end part and the small end part of the hollow thin-wall gear shaft by adopting a clamping piece; and grinding, namely grinding the first outer circle and the second outer circle by adopting a combined type forming CBN grinding wheel, grinding the first inner hole by adopting an umbrella-shaped CBN grinding wheel, grinding the second inner hole by adopting a first columnar CBN grinding wheel, and grinding the third inner hole by adopting a second columnar CBN grinding wheel.
In a preferred embodiment of the present invention, the grinding process includes:
roughly grinding the first outer circle and the second outer circle;
fine grinding the first outer circle and the second outer circle, and simultaneously rough grinding the first inner hole and the second inner hole;
and fine grinding the third inner hole.
In a preferred embodiment of the present invention, the clamping member includes:
the chuck of the elastic three-jaw clamps the small end clamping surface of the outer wall of the small end part;
and the chuck of the elastic hydraulic three-jaw clamps the large-end clamping surface of the outer wall of the large-end part.
In a preferred embodiment of the present invention, the single-side grinding allowance of the first inner hole, the second inner hole, the first outer circle and the second outer circle is 0.12mm; the unilateral grinding allowance of the third inner hole is 0.075mm.
In a preferred embodiment of the present invention, the grinding process includes: and the grinding process takes the tooth top of the pinion as a reference, clamps the excircle of the hollow thin-wall gear shaft and drives the hollow thin-wall gear shaft to rotate.
In a preferred embodiment of the present invention, the outer circle of the pinion tooth top satisfies a runout of 0.01mm.
In the preferred embodiment of the invention, the outer diameter of the combined type forming CBN grinding wheel is 565.14mm, the length is 88.23mm, the aperture of an inner hole is 100mm, the linear speed is 80m/s, and the abrasive particle size is 80um.
In a preferred embodiment of the present invention, the umbrella-shaped CBN grinding wheel has an outer diameter of 36.63mm, a length of 23mm, an inner hole aperture of 18mm, a linear velocity of 60m/s and a grinding particle size of 100um.
In a preferred embodiment of the present invention, the first cylindrical CBN grinding wheel has an outer diameter of 22mm, a length of 26mm, an inner hole diameter of 10mm, a linear velocity of 60m/s and a grinding particle size of 100um.
In a preferred embodiment of the present invention, the second cylindrical CBN grinding wheel has an outer diameter of 20mm, a length of 25mm, an inner hole diameter of 8mm, a linear velocity of 40m/s and a grinding particle size of 100um.
The embodiment of the invention has the beneficial effects that: this technical scheme carries out simultaneous processing with the disposable clamping of hollow thin wall pinion on equipment to a plurality of holes, the excircle on the hollow thin wall pinion, optimizes into a process many processes of accurate conversion many times, uses compound grinder processing, promotes machining efficiency, promotes a plurality of positions hole and excircle axiality, with the axiality accuracy control within 0.015mm, promotes product quality.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is an embodiment of the present invention;
FIG. 2 is a schematic structural view of a combined CBN grinding wheel according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of an umbrella-shaped CBN grinding wheel according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a first columnar CBN grinding wheel according to an embodiment of the invention.
Icon: 100-hollow thin-wall gear shaft; 110 — a first bore; 120-a third bore; 130-a second bore; 140-first outer circle; 150-second outer circle; a-a small end clamping surface; b-a large end clamping surface; 001-axial positioning probe; 002-online probe; 200-forming a CBN grinding wheel in a combined mode; 300-umbrella-shaped CBN grinding wheel; 400-first cylindrical CBN grinding wheel. 210-a first grinding section; 220-a second grinding section; 230-a third grinding section; 240-avoidance slot; 250-mounting holes; 260-a positioning groove; 270-fixing hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
First embodiment
Referring to fig. 1, the hollow thin-walled pinion used in the DCT dual clutch automobile field has the characteristics of a complex structure and large heat treatment deformation, the hollow thin-walled pinion 100 includes a first inner hole 110, a third inner hole 120, and a second inner hole 130 sequentially arranged from a large end to a small end, the outer wall of the hollow thin-walled pinion 100 is provided with 1 first outer circle 140 and 2 second outer circles 150, and the first outer circle 140 and the second outer circle 150 are located between the third inner hole 120 and the second inner hole 130. The diameter of the first outer circle 140 is 35mm, the diameter of the second outer circle 150 is 34mm, the diameter of the first inner hole 110 is 45mm, the diameter of the second inner hole 130 is 26mm, and the diameter of the third inner hole 120 is 28mm.
The embodiment provides a processing method suitable for a hollow thin-wall gear shaft 100, which comprises the following steps:
1. clamping, namely clamping the large end part and the small end part of the hollow thin-wall gear shaft 100 by adopting a clamping piece; specifically, a small end clamping surface A of the outer wall of the small end part is clamped by an elastic three-jaw chuck; and a large-end clamping surface B of the outer wall of the large end part is clamped by adopting an elastic hydraulic three-jaw chuck.
2. And (3) grinding, namely grinding the first outer circle 140 and the second outer circle 150 by using the combined type forming CBN grinding wheel 200, grinding the first inner hole 110 by using the umbrella-shaped CBN grinding wheel 300, grinding the second inner hole 130 by using the first columnar CBN grinding wheel 400, and grinding the third inner hole 120 by using the second columnar CBN grinding wheel.
More specifically, the grinding process comprises the following specific steps:
the grinding processing takes the addendum of a pinion as a reference, an axial positioning probe 001 and an online probe 002 are adopted to detect whether the reference is correct, the outer circle of the hollow thin-wall gear shaft 100 is clamped and drives the hollow thin-wall gear shaft 100 to rotate, the outer circle of the addendum of the pinion meets the jumping of 0.01mm, the product rotating speed is 121r/min, a first outer circle 140 and a second outer circle 150 are roughly ground by adopting a combined type forming CBN grinding wheel 200, the speed of the combined type forming CBN grinding wheel 200 is 70m/s, the linear speed is 80m/s, the grinding material with the grinding wheel specification is 5SG, and the first processing feeding amount of the combined type forming CBN grinding wheel 200 is 2.5mm/min; the second processing feed amount is 0.8mm/min; the third processing feed amount was 0.2mm/min.
The grinding processing is based on the tooth top of a pinion, the outer circle of the hollow thin-wall gear shaft 100 is clamped and the hollow thin-wall gear shaft 100 is driven to rotate, the outer circle of the tooth top of the pinion meets the jumping of 0.01mm, the first outer circle 140 and the second outer circle 150 are finely ground by adopting a combined forming CBN grinding wheel 200, meanwhile, the first inner hole 110 and the second inner hole 130 are roughly ground by adopting an umbrella-shaped CBN grinding wheel 300 and a first columnar CBN grinding wheel 400 respectively, the linear speed of the umbrella-shaped CBN grinding wheel 300 is 60m/s, the linear speed of the first columnar CBN grinding wheel 400 is 40m/s, and the single-side grinding allowance of the first inner hole 110, the second inner hole 130, the first outer circle 140 and the second outer circle 150 is 0.12mm;
and the grinding processing takes the tooth top of the pinion as a reference, the outer circle of the hollow thin-wall gear shaft 100 is clamped and driven to rotate, the outer circle of the tooth top of the pinion meets the jumping requirement of 0.01mm, a second cylindrical CBN grinding wheel is adopted to finish grind the third inner hole 120, the unilateral grinding allowance of the third inner hole 120 is 0.075mm, and the linear speed of the second cylindrical CBN grinding wheel is 60m/s.
Specific grinding process parameters are shown in table 1 below:
Figure BDA0003324200540000061
Figure BDA0003324200540000071
TABLE 1
More specifically, referring to fig. 2-4, the combined molded CBN grinding wheel 200 has an outer diameter of 565.14mm, a length of 88.23mm, an inner hole aperture of 100mm, a linear velocity of 80m/s, and an abrasive grain size of 80um. The combined type forming CBN grinding wheel 200 is a customized grinding wheel, the outer wall of the grinding wheel body is provided with a first grinding part 210, a second grinding part 220 and a third grinding part 230 for grinding one first outer circle 140 and 2 second outer circles 150, the diameters of the second grinding part 220 and the third grinding part 230 are 1mm larger than that of the first grinding part 210, and an avoiding groove 240 is formed between the second grinding part 220 and the third grinding part 230. The middle part of the grinding wheel body is provided with a mounting hole 250, a positioning groove 260 and a fixing hole 270 which are convenient to mount.
The external diameter of the umbrella-shaped CBN grinding wheel 300 is 36.63mm, the length is 23mm, the aperture of an inner hole is 18mm, the linear velocity is 60m/s, and the abrasive particle size is 100um.
The outer diameter of the grinding of the first cylindrical CBN grinding wheel 400 is 22mm, the length is 26mm, the aperture of an inner hole is 10mm, the linear velocity is 60m/s, and the abrasive particle size is 100um.
The outer diameter of the second cylindrical CBN grinding wheel is 20mm, the length is 25mm, the aperture of an inner hole is 8mm, the linear speed is 40m/s, the abrasive particle size is 100um, and the first cylindrical CBN grinding wheel 400 and the second cylindrical CBN grinding wheel are the same in shape structure and are different only in parameters.
In conclusion, according to the technical scheme, the hollow thin-wall gear shaft 100 is clamped on equipment at one time, a plurality of inner holes and outer circles on the hollow thin-wall gear shaft 100 are simultaneously machined, a plurality of procedures of multiple accurate conversion are optimized into one procedure, a composite grinding machine is used for machining, machining efficiency is improved, coaxiality of the inner holes and the outer circles at a plurality of positions is improved, coaxiality accuracy is controlled within 0.015mm, and product quality is improved.
This description describes examples of embodiments of the invention, and is not intended to illustrate and describe all possible forms of the invention. It should be understood that the embodiments described in this specification can be implemented in many alternative forms. The figures are not necessarily to scale; some features may be exaggerated or minimized to show details of particular components. Specific structural and functional details disclosed are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present invention. It will be appreciated by persons skilled in the art that a plurality of features illustrated and described with reference to any one of the figures may be combined with features illustrated in one or more other figures to form embodiments which are not explicitly illustrated or described. The described combination of features provides a representative embodiment for a typical application. However, various combinations and modifications of the features consistent with the teachings of the present invention may be used as desired for particular applications or implementations.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. The utility model provides a processing method suitable for hollow thin wall pinion, hollow thin wall pinion includes first hole, third hole and the second hole that sets gradually from big tip to little tip, the outer wall of hollow thin wall pinion is provided with 1 first excircle and 2 second excircle, first excircle and second excircle are located between third hole and the second hole, its characterized in that, processing method includes:
clamping, namely clamping the large end part and the small end part of the hollow thin-wall gear shaft by adopting a clamping piece;
grinding, namely grinding the first outer circle and the second outer circle by using a combined type formed CBN grinding wheel, grinding the first inner hole by using an umbrella-shaped CBN grinding wheel, grinding the second inner hole by using a first columnar CBN grinding wheel, and grinding the third inner hole by using a second columnar CBN grinding wheel;
the grinding process comprises the following steps:
roughly grinding the first outer circle and the second outer circle;
finish grinding the first outer circle and the second outer circle, and rough grinding the first inner hole and the second inner hole simultaneously;
and fine grinding the third inner hole.
2. The machining method suitable for the hollow thin-walled gear shaft according to claim 1, wherein the clamping member comprises:
the chuck of the elastic three-jaw clamps the small end clamping surface of the outer wall of the small end part;
and the chuck of the elastic hydraulic three-jaw clamps the large-end clamping surface of the outer wall of the large end part.
3. The machining method suitable for the hollow thin-walled gear shaft according to claim 1, characterized in that the single-side grinding allowance of the first inner hole, the second inner hole, the first outer circle and the second outer circle is 0.12mm; and the unilateral grinding allowance of the third inner hole is 0.075mm.
4. The machining method suitable for the hollow thin-walled gear shaft according to claim 1, wherein the grinding step comprises: and the grinding processing uses the tooth top of the pinion at the small end part as a reference, clamps the excircle of the hollow thin-wall gear shaft and drives the hollow thin-wall gear shaft to rotate.
5. The machining method for the hollow thin-walled gear shaft according to claim 4, wherein the outer circle of the pinion tooth crest satisfies a runout of 0.01mm.
6. The machining method suitable for the hollow thin-walled toothed shaft according to claim 1, wherein the combined type formed CBN grinding wheel has an outer diameter of 565.14mm, a length of 88.23mm, an inner hole aperture of 100mm, a linear velocity of 80m/s and an abrasive particle size of 80um.
7. The machining method suitable for the hollow thin-walled gear shaft according to claim 1, characterized in that the umbrella-shaped CBN grinding wheel grinds 36.63mm in outer diameter, 23mm in length, 18mm in inner hole diameter, 60m/s in linear velocity and 100um in abrasive grain size.
8. The machining method suitable for the hollow thin-walled gear shaft according to claim 1, wherein the first cylindrical CBN grinding wheel is used for grinding with an outer diameter of 22mm, a length of 26mm, an inner hole diameter of 10mm, a linear speed of 60m/s and a grinding particle size of 100um.
9. The machining method suitable for the hollow thin-walled gear shaft according to claim 1, wherein the second cylindrical CBN grinding wheel is used for grinding with an outer diameter of 20mm, a length of 25mm, an inner hole diameter of 8mm, a linear speed of 40m/s and a grinding particle size of 100um.
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JP2652823B2 (en) * 1991-04-22 1997-09-10 日野自動車工業株式会社 Manufacturing method of gear shaft
CN102079045A (en) * 2009-12-01 2011-06-01 贵州航天控制技术有限公司 Processing method of parts with long shaft and thin wall and processing clamp thereof
CN108044318B (en) * 2017-12-19 2020-12-11 中石化石油机械股份有限公司三机分公司 Machining process of thin-wall and deep-hole cylinder sleeve
CN108213874A (en) * 2018-01-12 2018-06-29 中国航发哈尔滨东安发动机有限公司 Titanium alloy hollow thin-wall long shaft part processing method
CN109695623B (en) * 2019-02-01 2020-07-31 河南科技大学 Integral lightweight gear shaft and manufacturing process thereof
CN110216430B (en) * 2019-04-30 2022-01-25 兴化市统一齿轮有限公司 Method for processing hollow gear shaft

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