CN208929248U - A kind of vehicle boring precision stepped hole General positioning fixture - Google Patents

A kind of vehicle boring precision stepped hole General positioning fixture Download PDF

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Publication number
CN208929248U
CN208929248U CN201821677790.7U CN201821677790U CN208929248U CN 208929248 U CN208929248 U CN 208929248U CN 201821677790 U CN201821677790 U CN 201821677790U CN 208929248 U CN208929248 U CN 208929248U
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CN
China
Prior art keywords
spreading
hole
mandrel
stepped hole
conical sleeve
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Active
Application number
CN201821677790.7U
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Chinese (zh)
Inventor
梁小春
曾剑辉
石鑫
熊瑛
龚仲斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangxi Hongdu Aviation Industry Group Co Ltd
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Jiangxi Hongdu Aviation Industry Group Co Ltd
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Priority to CN201821677790.7U priority Critical patent/CN208929248U/en
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Abstract

The utility model discloses a kind of vehicle boring precision stepped hole General positioning fixture, including conical sleeve and spreading mandrel, the left end of conical sleeve is in butt frustum structure, the combination pilot hole that there is right end the bellmouth of flaring out to turn threaded hole;Set collar is had on the axle body of the spreading mandrel, it is equipped with and the matched conical journal of conical sleeve bellmouth on the axle body of spreading mandrel positioned at the left side of set collar, the left end of spreading mandrel is equipped with and the matched external screw thread of conical sleeve threaded hole, the spreading shaft screw hole that there is right end the bellmouth of outer flaring to turn threaded hole, spreading shaft screw are preinstalled with shaft screw in hole.Flexibly, versatility is good, and spreading amplitude range is controllable, can cooperate the ladder PRECISION HOLE for processing different classes of part well, ensure that the position accuracy demands such as stepped hole concentricity for the production of the utility model fixture, dismounting.

Description

A kind of vehicle boring precision stepped hole General positioning fixture
Technical field
The utility model relates to field of machining, are specifically related to a kind of vehicle boring precision stepped hole General positioning fixture.
Background technique
In the mechanical part processing of aviation field, contain the zero of accurate stepped hole using plain clamp vehicle boring processing When part, dismounting is inconvenient, takes time and effort, and is unfavorable for batch production, and there are position inaccurates, cause the risk of part rejection;And it adopts When with special fixture, each part will be equipped with a sleeve clamp, higher cost, it is therefore necessary to design a kind of vehicle boring precision ladder Hole General positioning fixture.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, provide a kind of vehicle boring precision stepped hole general locating clip Tool.
Technical solutions of the utility model:
A kind of vehicle boring precision stepped hole General positioning fixture, including conical sleeve and spreading mandrel, the left end of conical sleeve In butt frustum structure, right end turns the combination pilot hole of threaded hole with the bellmouth of flaring out;The axis of the spreading mandrel Set collar is had with it, and the left side of set collar is located on the axle body of spreading mandrel equipped with matched with conical sleeve bellmouth Conical journal, the left end of spreading mandrel, which is equipped with, has the taper of outer flaring with the matched external screw thread of conical sleeve threaded hole, right end Hole turns the spreading shaft screw hole of threaded hole, and spreading shaft screw is preinstalled with shaft screw in hole.
Further, spreading mandrel right end excircle dimension is depending on the size of the stepped hole small end of part.
Further, the length of spreading mandrel right end Distance positioning collar is not more than the depth of part stepped hole.
Further, the length of spreading mandrel right end Distance positioning collar is 1/3-the 2/3 of part ladder hole depth.
Further, spreading mandrel is fabricated by the bar of 30CrMnSiA.
Flexibly, versatility is good, and spreading amplitude range is controllable for the production of the utility model fixture, dismounting, can cooperate well and add The ladder PRECISION HOLE of the different classes of part of work ensure that the position accuracy demands such as stepped hole concentricity, especially in batch part Processing aspect effect is more processed significantly, with the obvious advantage, can be increased substantially production efficiency, be reduced batch parts scrap rate, meet Production requirement.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model preferred embodiment;
Fig. 2 is the structural schematic diagram of conical sleeve in the utility model preferred embodiment;
Fig. 3 is the structural schematic diagram of spreading mandrel in the utility model preferred embodiment;
Fig. 4 is the structural schematic diagram of part in the utility model preferred embodiment;
Fig. 5 be Fig. 4 along the sectional view of A-A;
In figure: lathe spindle 1, conical sleeve 2, spreading mandrel 3, shaft screw 4, part 5, set collar 31, tapered shaft Neck 32.
Specific embodiment
In order to be easy to understand the technical means, creative features, achievement of purpose, and effectiveness of the utility model, under Face combines and is specifically illustrating, and the utility model is further described.
Embodiment: such as Fig. 1 --- shown in Fig. 5, a kind of vehicle boring precision stepped hole General positioning fixture, including conical sleeve 2 With spreading mandrel 3, the left end of conical sleeve 2 is in butt frustum structure, and there is right end the bellmouth of flaring out to turn threaded hole Combine pilot hole;Set collar 31 is had on the axle body of the spreading mandrel 3, is located at set collar on the axle body of spreading mandrel 3 31 left side is equipped with to be equipped with and conical sleeve 2 with the matched conical journal 32 of 2 bellmouth of conical sleeve, the left end of spreading mandrel 3 The matched external screw thread of threaded hole, the right end of spreading mandrel 3 are precision outer circle, and there is right end the bellmouth of outer flaring to turn threaded hole Spreading shaft screw hole, spreading shaft screw are preinstalled with shaft screw 4 in hole.
Further, 3 right end excircle dimension of spreading mandrel is depending on the size of the stepped hole small end of part 5.
Further, the length of 3 right end Distance positioning collar 31 of spreading mandrel is not more than the depth of 5 stepped hole of part.
Further, the length of 3 right end Distance positioning collar 31 of spreading mandrel is 1/3-the 2/3 of part ladder hole depth.
Further, spreading mandrel 3 is fabricated by the bar of 30CrMnSiA.
When clamping, the left end of conical sleeve 2 and lathe spindle 1 are cooperated into clamping, right end is spirally connected with 3 left end of spreading mandrel, Shaft screw 4, the ladder interstitial hole ruler of 3 right end excircle dimension of spreading mandrel and processing part is pre-installed in the right end of spreading mandrel 3 Very little matching.When part is processed, adjustment 3 left end of spreading mandrel is externally threaded elastic, pastes spreading mandrel 3 and conical sleeve 2 mutually Co-clip is tight, 5 stepped hole one end of part is bonded to the plane of set collar 31, on the right side of spreading mandrel 3 in accurate outer circle mating parts 5 Between hole be pressurized control spreading amplitude by the conical surface, make spreading mandrel by adjusting the elastic of the shaft screw 4 built in spreading mandrel 3 3 outer round surface are bonded with part interstitial hole inner hole surface, i.e., automatic retaining element, spreading amplitude-controllable system exist in a manner of " spreading " Within the scope of 0.1mm, to guarantee that 3 right side end of spreading mandrel cannot stretch out ladder nose end in practice, avoid manufacturing collision, then Part only needs to carry out by normal process method.
The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above.Current row The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments Only illustrate the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model is also It will have various changes and improvements, these various changes and improvements fall within the scope of the claimed invention.The utility model Claimed range is defined by the appending claims and its equivalent thereof.

Claims (5)

1. a kind of vehicle boring precision stepped hole General positioning fixture, including conical sleeve and spreading mandrel, which is characterized in that taper sheath The left end of cylinder is in butt frustum structure, the combination pilot hole that there is right end the bellmouth of flaring out to turn threaded hole;The spreading Set collar is had on the axle body of mandrel, the left side that set collar is located on the axle body of spreading mandrel is equipped with and conical sleeve taper The matched conical journal in hole, the left end of spreading mandrel be equipped with the matched external screw thread of conical sleeve threaded hole, right end, which has, to be extended out The bellmouth of mouth turns the spreading shaft screw hole of threaded hole, and spreading shaft screw is preinstalled with shaft screw in hole.
2. a kind of vehicle boring precision stepped hole General positioning fixture according to claim 1, which is characterized in that spreading mandrel is right Hold excircle dimension depending on the size of the stepped hole small end of part.
3. a kind of vehicle boring precision stepped hole General positioning fixture according to claim 1, which is characterized in that spreading mandrel is right The length of Distance positioning collar is held to be not more than the depth of part stepped hole.
4. a kind of vehicle boring precision stepped hole General positioning fixture according to claim 1 or 3, which is characterized in that spreading core The length of axis right end Distance positioning collar is 1/3-the 2/3 of part ladder hole depth.
5. a kind of vehicle boring precision stepped hole General positioning fixture according to claim 1, which is characterized in that spreading mandrel by The bar of 30CrMnSiA is fabricated.
CN201821677790.7U 2018-10-17 2018-10-17 A kind of vehicle boring precision stepped hole General positioning fixture Active CN208929248U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821677790.7U CN208929248U (en) 2018-10-17 2018-10-17 A kind of vehicle boring precision stepped hole General positioning fixture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821677790.7U CN208929248U (en) 2018-10-17 2018-10-17 A kind of vehicle boring precision stepped hole General positioning fixture

Publications (1)

Publication Number Publication Date
CN208929248U true CN208929248U (en) 2019-06-04

Family

ID=66724740

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201821677790.7U Active CN208929248U (en) 2018-10-17 2018-10-17 A kind of vehicle boring precision stepped hole General positioning fixture

Country Status (1)

Country Link
CN (1) CN208929248U (en)

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