CN205254276U - Gapless positioning fixture of awl in hollow shaft class work piece - Google Patents

Gapless positioning fixture of awl in hollow shaft class work piece Download PDF

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Publication number
CN205254276U
CN205254276U CN201620002180.1U CN201620002180U CN205254276U CN 205254276 U CN205254276 U CN 205254276U CN 201620002180 U CN201620002180 U CN 201620002180U CN 205254276 U CN205254276 U CN 205254276U
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China
Prior art keywords
tapered sleeve
positioning fixture
mandrel
hollow shaft
taper sleeve
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Application number
CN201620002180.1U
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Chinese (zh)
Inventor
张立辉
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Zhuzhou Gear Co Ltd
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Zhuzhou Gear Co Ltd
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Priority to CN201620002180.1U priority Critical patent/CN205254276U/en
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Abstract

The utility model relates to a gapless positioning fixture of awl in hollow shaft class work piece, it is by dabber, taper sleeve and hexagonal nut triplex, have the central through hole on the taper sleeve, taper sleeve circumference has the vertical cut (V. Cut) groove of equipartition, and both ends misplace the fluting each other and form the breach groove about this taper sleeve, and dabber both ends face has the center bevel hole, and the dabber upper end is the helicitic texture, and the lower part is the toper boss, and the lower extreme is the sphere body, this dabber suit is in hollow shaft class work piece to the taper sleeve of packing into stretches out to be connected and to constitute the positioning fixture with the hexagonal nut. This taper sleeve circumference etc. Separately has equipartition breach groove, under the exogenic action, makes it to become the elastic sleeve. During the use, under the effect of the packing force of nut, the hole of taper sleeve contracts gradually, up to holding the outside diameter of mandrel tightly to realization zero clearance location. The utility model discloses simple structure, convenient reliable, this positioning fixture have improved product machining accuracy, and it is the basis of making the high -end product, has extensive application prospect at quick -witted processing enterprises.

Description

The gapless positioning fixture of a kind of hollow shaft type workpiece inner cone
Technical field
The utility model relates to the gapless positioning fixture of a kind of hollow shaft type workpiece inner cone, and it is a kind of for operations such as gear industry mill external tooth, mill external splines, cylindrical grinding, mill external screw threads
Positioning fixture.
Background technology
At present, in drive axle of heavy truck, there is a kind of hollow shaft type workpiece. This Workpiece structure inner via hole, there are rectangular spline, cylindrical, screw thread outward, require spline pitch circle, cylindrical and nut pitch circle coaxially higher, after heat treatment, grind in spline, cylindrical grinding and hard cutting thread process, all taking the inner conical surface at product two ends as positioning datum, but there is defect in jig Design, tapered sleeve in fixture and mandrel cylindrical are that matched in clearance position error is large, and particularly uncompensated after wearing and tearing, fit clearance is larger, position error is larger, so converted products cannot reach high precision.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned defect, and a kind of gapless positioning fixture of a kind of hollow shaft type workpiece inner cone reliable, with low cost simple in structure, convenient is provided.
For solving the problems of the technologies described above, the utility model adopts following technical scheme: the gapless positioning fixture of a kind of hollow shaft type workpiece inner cone, is characterized in that this described positioning fixture is made up of mandrel, tapered sleeve and six square nut three parts;
Described tapered sleeve is provided with central through hole, tapered sleeve is circumferentially with uniform vertical cut (V. cut) groove, this vertical cut (V. cut) groove is from tapered sleeve upper end open and lower ending opening, and the upper and lower two ends of tapered sleeve mutual dislocation is slotted and formed gap slot, makes its tapered sleeve under the effect of external force, form elastic conical drogue;
Described mandrel both ends of the surface are provided with the center taper hole for locating, and this mandrel upper end is helicitic texture, and mandrel top is cylinder, and bottom is cone boss, and lower end is spherical surface body, are cylinder between cone boss and spherical surface body; This core sleeve is contained in hollow shaft type workpiece, and packs tapered sleeve into and stretch out and be connected with six square nuts and form positioning fixture.
Mandrel in the utility model is through workpiece hole clamping workpiece, and mandrel lower taper is protruding
Platform outer cone coordinates location with workpiece inner cone, and the center taper hole of mandrel both ends of the surface was located and supporting role with top cooperation of lathe. The outer cone of tapered sleeve coordinates with workpiece inner cone, and tapered sleeve endoporus coordinates with mandrel cylindrical, plays the role of positioning. Six square nuts promote tapered sleeve by nut and down carry out workpiece location and workpiece pressing.
The center taper hole at the mandrel two ends in the utility model require lower end sphere, male cone (strobilus masculinus) and nut lower end cylindrical with respect to the runout error of center taper hole in 0.003, roughness is less than Ra0.4, conical surface angle is identical with the interior coning angle of product. Mandrel is through product endoporus clamping, and the outer cone of mandrel lower taper boss coordinates location with workpiece one end inner cone. The run-out tolerance of the relative internal diameter of outer cone of tapered sleeve is in 0.003, and the perpendicularity of the relative endoporus in tapered sleeve upper surface is in 0.003, and tapered sleeve three place's roughness are all less than Ra0.4; Tapered sleeve endoporus coordinates with mandrel cylindrical, the outer cone of tapered sleeve coordinates with workpiece other end inner cone, compress tapered sleeve by six square nuts, workpiece is located between the conical surface of two ends, while, the outer cone of tapered sleeve was by the guide effect of workpiece inner cone along with the increase of the thrust of six square nuts, and the endoporus of tapered sleeve shrinks gradually, until hold the external diameter of mandrel tightly, realize gapless location. The upper and lower center of mandrel taper hole was located and supporting role with top cooperation of lathe, and machine tool chief axis chuck clamps mandrel lower end sphere, completes the location clamping process of whole product.
The utility model technical essential is the structure of tapered sleeve, and circumference equal dividing has 12 gap slots (not groove), and adjacent gap slot mutual dislocation arranges, under external force, makes it to become and has the little resilient sleeve that swells and dwindle. In use, under the effect of the thrust of six square nuts, the outer cone of tapered sleeve is by the guide effect of workpiece inner cone, and the endoporus of tapered sleeve shrinks gradually, until hold the external diameter of mandrel tightly, thus realize gapless location.
The utility model is simple in structure, convenient reliable, with low cost, and the gapless positioning fixture of this hollow shaft type workpiece inner cone has improved this series products machining accuracy, and it is the basis of manufacturing high-end product, and in machined, enterprise is with a wide range of applications.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the sectional structure schematic diagram of tapered sleeve;
Fig. 3 is the plan structure schematic diagram of tapered sleeve;
In figure: 1-mandrel, 2-tapered sleeve, 3-six square nuts, 21-gap slot.
Detailed description of the invention
Be described in detail below in conjunction with accompanying drawing and to the utility model, the gapless positioning fixture of a kind of hollow shaft type workpiece inner cone, is characterized in that this described positioning fixture is made up of mandrel 1, tapered sleeve 2 and six square nut 3 three parts;
Described tapered sleeve 2 is provided with central through hole, tapered sleeve 2 is circumferentially with uniform vertical cut (V. cut) groove 21, this vertical cut (V. cut) groove 21 is from tapered sleeve 2 upper end open and lower ending opening, and tapered sleeve two ends mutual dislocation fluting and form gap slot Shang Xia 2, makes its tapered sleeve 2 under the effect of external force, form elastic conical drogue;
Described mandrel 1 both ends of the surface are provided with the center taper hole for locating, and this mandrel 1 upper end is helicitic texture, and mandrel 1 top is cylinder, and bottom is cone boss, and lower end is spherical surface body, is cylinder between cone boss and spherical surface body; This mandrel 1 is sleeved in hollow shaft type workpiece, and packs tapered sleeve 2 into and stretch out and be connected with six square nuts 3 and form positioning fixture. Tapered sleeve 2 in the present embodiment is circumferentially with 12 uniform vertical cut (V. cut) grooves 21.
Mandrel 1 in the utility model is through workpiece hole clamping workpiece, mandrel 1 bottom cone
Shape boss outer cone coordinates location with workpiece inner cone, and the center taper hole of mandrel 1 both ends of the surface was located and supporting role with top cooperation of lathe. The outer cone of tapered sleeve 2 coordinates with workpiece inner cone, and tapered sleeve 2 endoporus coordinate with mandrel 1 cylindrical, play the role of positioning. Six square nuts 3 promote tapered sleeve by nut and down carry out workpiece location and workpiece pressing.
When this positioning fixture uses, the first step, is inserted in workpiece in mandrel 1, packs tapered sleeve 2 into, tightens six square nuts 3, after workpiece product sequence is complete, then reverse operating, take out product, complete a working cycles.
The utility model is simple in structure, convenient reliable, with low cost, and the gapless positioning fixture of this hollow shaft type workpiece inner cone has improved this series products machining accuracy, and it is the basis of manufacturing high-end product, and in machined, enterprise is with a wide range of applications.

Claims (2)

1. the gapless positioning fixture of hollow shaft type workpiece inner cone, is characterized in that this described positioning fixture is made up of mandrel (1), tapered sleeve (2) and six square nut (3) three parts;
Described tapered sleeve (2) is provided with central through hole, tapered sleeve (2) is circumferentially with uniform vertical cut (V. cut) groove (21), this vertical cut (V. cut) groove (21) is from tapered sleeve (2) upper end open and lower ending opening, be that the upper and lower two ends of tapered sleeve (2) mutual dislocation is slotted and forms gap slot, make its tapered sleeve (2) under the effect of external force, form elastic conical drogue;
Described mandrel (1) both ends of the surface are provided with the center taper hole for locating, and this mandrel (1) upper end is helicitic texture, and mandrel (1) top is cylinder, and bottom is cone boss, and lower end is spherical surface body, is cylinder between cone boss and spherical surface body; This mandrel (1) is sleeved in hollow shaft type workpiece, and packs tapered sleeve (2) into and stretch out and be connected with six square nuts (3) and form positioning fixture.
2. the gapless positioning fixture of a kind of hollow shaft type workpiece inner cone as claimed in claim 1, is characterized in that described tapered sleeve (2) is circumferentially with 12 uniform vertical cut (V. cut) grooves (21).
CN201620002180.1U 2016-01-05 2016-01-05 Gapless positioning fixture of awl in hollow shaft class work piece Active CN205254276U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620002180.1U CN205254276U (en) 2016-01-05 2016-01-05 Gapless positioning fixture of awl in hollow shaft class work piece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620002180.1U CN205254276U (en) 2016-01-05 2016-01-05 Gapless positioning fixture of awl in hollow shaft class work piece

Publications (1)

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CN205254276U true CN205254276U (en) 2016-05-25

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CN201620002180.1U Active CN205254276U (en) 2016-01-05 2016-01-05 Gapless positioning fixture of awl in hollow shaft class work piece

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CN (1) CN205254276U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110293430A (en) * 2019-06-24 2019-10-01 中国航发动力股份有限公司 A kind of flexible anti-vibration mandrel and clamping method for processing thin-walled tubes part
CN112756710A (en) * 2021-01-07 2021-05-07 中国航发中传机械有限公司 Self-centering anti-vibration clamp for grinding and machining thin-web-plate gear part and clamping method
CN113458917A (en) * 2021-09-06 2021-10-01 成都志力科技发展有限责任公司 Accurate guidance steering wheel shell anchor clamps of polishing

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110293430A (en) * 2019-06-24 2019-10-01 中国航发动力股份有限公司 A kind of flexible anti-vibration mandrel and clamping method for processing thin-walled tubes part
CN112756710A (en) * 2021-01-07 2021-05-07 中国航发中传机械有限公司 Self-centering anti-vibration clamp for grinding and machining thin-web-plate gear part and clamping method
CN113458917A (en) * 2021-09-06 2021-10-01 成都志力科技发展有限责任公司 Accurate guidance steering wheel shell anchor clamps of polishing
CN113458917B (en) * 2021-09-06 2021-11-16 成都志力科技发展有限责任公司 Accurate guidance steering wheel shell anchor clamps of polishing

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