CN101844321A - Positioning clamp for finished plane - Google Patents

Positioning clamp for finished plane Download PDF

Info

Publication number
CN101844321A
CN101844321A CN 201010195741 CN201010195741A CN101844321A CN 101844321 A CN101844321 A CN 101844321A CN 201010195741 CN201010195741 CN 201010195741 CN 201010195741 A CN201010195741 A CN 201010195741A CN 101844321 A CN101844321 A CN 101844321A
Authority
CN
China
Prior art keywords
lining
concentric arcs
bush
concentric
boss
Prior art date
Application number
CN 201010195741
Other languages
Chinese (zh)
Inventor
陈平
吴勇
Original Assignee
南通星维油泵油嘴有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 南通星维油泵油嘴有限公司 filed Critical 南通星维油泵油嘴有限公司
Priority to CN 201010195741 priority Critical patent/CN101844321A/en
Publication of CN101844321A publication Critical patent/CN101844321A/en

Links

Abstract

The invention relates to a positioning clamp for a finished plane, which comprises a bush with an opening, wherein the cross section of the bush is 'C' shaped; and at least three concentric arc bosses which are concentric with the bush are arranged on the inner surface of the bush. The concentric arc bosses are arranged on the inner surface of the bush, which is equivalent to that the middle part of an inner hole of the bush is cut, and thus, a contact area between the inner hole of the bush and the outer circle of a workpiece is reduced and influences of a processing shape of the inner hole of the bush on the clamping of the workpiece are avoided. Furthermore, the concentric arc bosses are uniformly arranged on the outer surface of the bush and concentric with the bush, so the contact area between the outer surface of the bush and a base body of the clamp is reduced and therefore avoids generating a small aperture between the outer circle of the bush and the base body of the clamp. A sinking groove and a concentric arc deformation groove are formed in the bush, so the wall thickness of a deformation surface of the bush is always kept the same and uniform deformation of the bush is guaranteed in a working process.

Description

A kind of positioning fixture that is used for finished plane

Technical field

The present invention relates to a kind of positioning fixture, specifically, relate to a kind of positioning fixture that is used for finished plane, it comprises the lining that has an opening, and this lining cross section is " C " shape.

Background technology

Along with the raising day by day that exhaust emissions of diesel engine requires, the operating pressure of diesel fuel system is also improving constantly.The pump end pressure of diesel fuel system has been brought up to 1200bar by 800bar, and the pump end pressure of electric-controlled co-rail system has been brought up to 1800bar.Rise to 25-30Mpa below the 20Mpa of the opening pressure of fuel injector by the S type.Improving constantly of injection pressure of injector also improved the requirement of the sealing property of fuel system.Fuel injector is as the fuel system operational terminal, and it has the many places sealing surface, for example the junction of the oil-in of oil injector body and high-pressure oil pipe, oil injector body plane and intermediate mass plane, intermediate mass plane and needle valve of fuel spray nozzle coupling part body plane.According to the industry technology standard, each place of being tightly connected is by flat seal, and the flatness that requires sealing surface is less than 0.0015mm, and roughness is less than Ra0.1.Sealing property can exert an influence to whole system.Sealing property is not good, can cause serious consequences such as leakage of oil, fuel injector hysteresis are opened, pressure is not enough, diesel engine can not start.

Existing positioning fixture includes lining, and this lining is c-shaped.As depicted in figs. 1 and 2, lining is directly to open an otch on cylinder.The positioning fixture of this structure can satisfy the fuel injector workpiece universal of different series.Because require to guarantee the stability of clamping workpiece, the cooperation face length of lining endoporus and excircle of workpiece, beating of plane that guiding length produces inadequately when avoiding clamping workpiece and cylindrical is overproof.But behind the liner sleeve length lengthening, the accuracy of manufacture of endoporus has produced very big variation.Because the aperture of the technical difficulty of slotted hole processing in the middle of being exactly is little, the aperture at two is big.And the small-bore of middle part deflection when clamping also is unlikely to reach the aperture at two, workpiece stressed in the lining endoporus so in fact in the middle part of lining, and two clamping in hole is unsettled.Be subjected to cutting force when grinding after, workpiece can produce the trace vibrations in the hole.After the positioning fixture processing of adopting this kind structure, use laser plane degree scanner to detect workpiece, can find the concavo-convex phenomenon in the well-regulated plane of surface of the work, the workpiece planarization degree is undesirable, and the workpiece qualification rate is low.So, than higher occasion, especially requiring the occasion on super grinding plane in required precision, the positioning fixture of this structure can not guarantee that the flatness of workpiece meets specification requirement.

Summary of the invention

Technical problem to be solved by this invention provides a kind of positioning fixture that is used for finished plane, with the flatness of raising workpiece, and then the sealing property and the qualification rate of raising workpiece, make workpiece meet specification requirement.

For solving the problems of the technologies described above, the technical solution used in the present invention is:

A kind of positioning fixture that is used for finished plane comprises the lining that has an opening, and this lining cross section is " C " shape, it is characterized in that, described sleeve inner surface is furnished with at least three concentric arcs boss concentric with lining.

Described concentric arcs boss is three, and is evenly arranged in sleeve inner surface.

Described concentric arcs boss is five, and wherein, a concentric arcs boss is positioned at the top at lining middle part; Two concentric arcs boss are arranged symmetrically in the lower end of lining front portion, and its angle is 120 degree; All the other two concentric arcs boss are arranged symmetrically in the lower end at lining rear portion, and its angle is 120 degree.

The outer surface of described lining is evenly arranged at least three concentric arcs boss concentric with lining.

The concentric arcs boss of described sleeve outer surface is three, and the position of the concentric arcs boss of itself and sleeve inner surface is corresponding, and the concentric arcs boss extends axially two ends to lining along sleeve outer surface.

The other end relative with its opening is provided with deep gouge and concentric arcs distortion groove in the described lining, and this deep gouge is communicated with lining endoporus and concentric arcs distortion groove, and this concentric arcs distortion groove is concentric with lining.

Compared with prior art, adopt its advantage of technical scheme of this patent to be:

1. improve the flatness of workpiece, and then improve the sealing property and the qualification rate of workpiece.Structure after the improvement is provided with the concentric arcs boss in sleeve inner surface, is equivalent to the middle part excision with the lining endoporus.The concentric arcs boss can evenly be arranged three in sleeve inner surface, perhaps can arrange five respectively at lining front portion, middle part and rear portion.Layout can reduce the contact area of lining endoporus and excircle of workpiece like this, can avoid the influence of the machining shape of lining endoporus to workpiece.

2. lining is installed in clip base firmly, avoids producing the small-bore between the cylindrical of lining and the clip base.Outer surface at lining is evenly arranged the concentric arcs boss.This concentric arcs boss is concentric with lining.Like this, the outer surface of lining and the contact area of clip base have just reduced, thereby can avoid producing the small-bore between the cylindrical of lining and the clip base.

3. workpiece is subjected to force direction and lining to be subjected to force direction consistent in clip base in lining.The concentric arcs boss of sleeve outer surface is corresponding mutually with the concentric arcs lug boss position of sleeve inner surface.Like this, can guarantee that workpiece is subjected to force direction and lining to be subjected to force direction consistent in lining in clip base.

4. lining is out of shape evenly in the course of the work.The other end relative with its opening is provided with deep gouge and concentric arcs distortion groove in the lining.Concentric arcs distortion groove is concentric with lining.Like this, the wall thickness of lining deformation plance remains unanimity, can guarantee that lining is out of shape evenly in the course of the work.

Description of drawings

Fig. 1 is the longitudinal sectional view of the lining mentioned in the background technology.

Fig. 2 is the A-A cutaway view among Fig. 1.

Fig. 3 is the longitudinal sectional view of the lining in this patent.

Fig. 4 is the A-A cutaway view among Fig. 3.

Fig. 5 is the B-B cutaway view among Fig. 3.

Fig. 6 is the C-C cutaway view among Fig. 3.

Among the figure, 1, opening, 2, lining, 3, the concentric arcs boss, 4, the concentric arcs boss, 5, deep gouge, 6, concentric arcs distortion groove.

The specific embodiment

To shown in Figure 6, a kind of positioning fixture that is used for finished plane of patent of the present invention comprises lining 2 as Fig. 3.One side of this lining 2 has an opening 1.Like this, the cross section of lining 2 is " C " shape.This lining 2 inner surfaces are arranged at least three concentric arcs boss 3 concentric with lining 2.According to actual conditions, the quantity of concentric arcs boss 3 and layout can have various ways, but preferred following two kinds of layouts:

First kind of layout type: the quantity of concentric arcs boss 3 is three, and is evenly arranged in lining 2 inner surfaces.From the cross section of lining 2, concentric arcs boss 3 is divided equally 360 degree to the line at lining 2 centers, and promptly the angle between the adjacent connection lines is 120 degree.Wherein, the top that is arranged in lining 2 inner surfaces with a concentric arcs boss 3 is good.Can allow workpiece in lining 2, fixedly positioning like this.

Second kind of layout type: concentric arcs boss 3 is arranged in front portion, middle part and the rear portion of lining 2 inner surfaces.Concentric arcs boss 3 is set so at interval, reduces material on the one hand, can reduce the generation of small-bore on the other hand.In this layout, with the quantity of concentric arcs boss 3 be five for good.A top that is positioned at lining 2 middle parts in five concentric arcs boss 3, two concentric arcs boss 3 are arranged symmetrically in the lower end of lining 2 front portions, and all the other two concentric arcs boss 3 are arranged symmetrically in the lower end at lining 2 rear portions.From the cross section of lining 2, the concentric arcs boss of lining 2 front portions 3 is to the line at lining 2 centers, overlaps with the concentric arcs boss 3 at the lining 2 rear portions line to lining 2 centers.The concentric arcs boss 3 at lining 2 middle parts is to the line at lining 2 centers, and the concentric arcs boss 3 of lining 2 front portions is 120 degree to the angle between the line at lining 2 centers; The concentric arcs boss 3 of lining 2 front portions also is 120 degree to the angle between the line at lining 2 centers.Adopt the advantage of this kind structure to be: fully to use for reference the advantage of vee-block, can make the elongated increase reliability of positioning of spigot surface of clamping workpiece face, eliminated the phenomenon of median pore radius little (with respect to the two ends projection) again.3 conducts of boss that are positioned at the top at lining 2 middle parts are subjected to the pressing plate of clamping force, and the phenomenon of median pore radius little (with respect to the two ends projection) no longer works to the location.

Structure before improving, lining 2 endoporus middle part is easy to generate the small-bore, and this can cause the well-regulated plane of surface of the work concavo-convex.Structure after the improvement is provided with concentric arcs boss 3, is equivalent to the middle part excision with lining 2 endoporus.Like this, can avoid lining 2 endoporus middle part to produce the small-bore, thereby improve the flatness of workpiece, and then improve the sealing property and the qualification rate of workpiece, make workpiece meet specification requirement.Use the positioning fixture of this structure, its operation principle is used for reference vee-block of the prior art and three-jaw opening quotation Positioning Principle, and the contact area of lining 2 endoporus and excircle of workpiece is reduced, and can avoid the influence of the machining shape of lining 2 endoporus to clamping.

As a kind of improvement project, the outer surface of lining 2 is evenly arranged at least three concentric arcs boss 4 concentric with lining 2.Because suit lining 2 in the clip base,,, evenly arrange concentric arcs boss 4 at the outer surface of lining 2 with reference to the fit system between lining 2 endoporus and the workpiece for producing the small-bore between the cylindrical of avoiding lining 2 and the clip base.This concentric arcs boss 4 is concentric with lining 2.Like this, the outer surface of lining 2 and the contact area of clip base have just reduced, thereby can avoid producing the small-bore between the cylindrical of lining 2 and the clip base.

Consider the layout of above-mentioned concentric arcs boss 3 at lining 2 inner surfaces, the concentric arcs boss 4 that is arranged in lining 2 outer surfaces is three, the position of the concentric arcs boss 3 of its position and lining 2 inner surfaces is corresponding, and concentric arcs boss 4 extends axially to the two ends of lining 2 along lining 2 outer surfaces.Like this, a concentric arcs boss 4 is arranged in lining 2 outer surface tops, and other two concentric arcs boss 4 are arranged symmetrically in the lower end of lining 2 outer surfaces, and adjacent two concentric arcs boss 4 centers are 120 degree to the angle of the line at lining 2 centers.Adopt this kind structure, can guarantee the uniformity of the stressed maintenance direction of the stressed and lining 2 of workpiece in lining 2 in clip base.

Further, be out of shape in the course of the work evenly for making lining 2, the other end relative with its opening 1 in the lining 2 is provided with deep gouge 5 and concentric arcs distortion groove 6.Deep gouge 5 is communicated with lining 2 endoporus and concentric arcs distortion groove 6.Concentric arcs distortion groove 6 is concentric with lining 2.Like this, the wall thickness of lining deformation plance remains unanimity, can guarantee that lining 2 is out of shape evenly in the course of the work.

The invention is not restricted to the above-mentioned specific embodiment, any lining 2 inner surfaces arrange at least three with the positioning fixture of the concentric concentric arcs boss 3 of lining 2 all in the protection domain at this patent.

Claims (9)

1. positioning fixture that is used for finished plane, comprise the lining (2) that has an opening (1), the cross section of this lining (2) is " C " shape, it is characterized in that, described lining (2) inner surface is arranged at least three concentric arcs boss (3) concentric with lining (2).
2. according to the described positioning fixture that is used for finished plane of claim 1, it is characterized in that described concentric arcs boss (3) is three, and be evenly arranged in lining (2) inner surface.
3. according to the described positioning fixture that is used for finished plane of claim 2, it is characterized in that the concentric arcs boss (3) in the described concentric arcs boss (3) is arranged in the top of lining (2) inner surface.
4. according to the described positioning fixture that is used for finished plane of claim 1, it is characterized in that described concentric arcs boss (3) is arranged in front portion, middle part and the rear portion of described lining (2) inner surface.
5. according to the described positioning fixture that is used for finished plane of claim 4, it is characterized in that described concentric arcs boss (3) is five, wherein, a concentric arcs boss (3) is positioned at the top at lining (2) middle part; Two concentric arcs boss (3) are arranged symmetrically in the anterior lower end of lining (2), and its angle is 120 degree; All the other two concentric arcs boss (3) are arranged symmetrically in the lower end at lining (2) rear portion, and its angle is 120 degree.
6. according to any one described positioning fixture that is used for finished plane in the claim 1 to 5, it is characterized in that the outer surface of described lining (2) is evenly arranged at least three concentric arcs boss (4) concentric with lining (2).
7. according to the described positioning fixture that is used for finished plane of claim 6, it is characterized in that, the concentric arcs boss (4) of described lining (2) outer surface is three, the position of the concentric arcs boss (3) of itself and lining (2) inner surface is corresponding, and concentric arcs boss (4) extends axially to the two ends of lining (2) along lining (2) outer surface.
8. according to any one described positioning fixture that is used for finished plane in the claim 1 to 5, it is characterized in that, the other end relative with its opening (1) is provided with deep gouge (5) and concentric arcs distortion groove (6) in the described lining (2), this deep gouge (5) is communicated with lining (2) endoporus and concentric arcs distortion groove (6), and this concentric arcs distortion groove (6) is concentric with lining (2).
9. according to the described positioning fixture that is used for finished plane of claim 7, it is characterized in that, the other end relative with its opening (1) is provided with deep gouge (5) and concentric arcs distortion groove (6) in the described lining (2), this deep gouge (5) is communicated with lining (2) endoporus and concentric arcs distortion groove (6), and this concentric arcs distortion groove (6) is concentric with lining (2).
CN 201010195741 2010-06-09 2010-06-09 Positioning clamp for finished plane CN101844321A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201010195741 CN101844321A (en) 2010-06-09 2010-06-09 Positioning clamp for finished plane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201010195741 CN101844321A (en) 2010-06-09 2010-06-09 Positioning clamp for finished plane

Publications (1)

Publication Number Publication Date
CN101844321A true CN101844321A (en) 2010-09-29

Family

ID=42769232

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201010195741 CN101844321A (en) 2010-06-09 2010-06-09 Positioning clamp for finished plane

Country Status (1)

Country Link
CN (1) CN101844321A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1274866A1 (en) * 1985-05-22 1986-12-07 Ждановский Филиал Кировоградского Проектно-Конструкторско-Технологического Института "Почвомаш" Die for cutting tubes
CN2105364U (en) * 1991-12-09 1992-05-27 杨家祥 Universal cutter grinding clamp
GB2352663A (en) * 1999-04-06 2001-02-07 Michael Irvine Jig for use in sharpening cutting tools
CN2593951Y (en) * 2002-11-14 2003-12-24 辽河石油勘探局总机械厂 Wedge style automatic centralizing clamp
CN201310837Y (en) * 2008-11-19 2009-09-16 达昌电子科技(苏州)有限公司 Connecting and positioning protective sleeve for liquid crystal display backlight tube
CN201744903U (en) * 2010-06-09 2011-02-16 南通星维油泵油嘴有限公司 Positioning fixture for refining plane

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1274866A1 (en) * 1985-05-22 1986-12-07 Ждановский Филиал Кировоградского Проектно-Конструкторско-Технологического Института "Почвомаш" Die for cutting tubes
CN2105364U (en) * 1991-12-09 1992-05-27 杨家祥 Universal cutter grinding clamp
GB2352663A (en) * 1999-04-06 2001-02-07 Michael Irvine Jig for use in sharpening cutting tools
CN2593951Y (en) * 2002-11-14 2003-12-24 辽河石油勘探局总机械厂 Wedge style automatic centralizing clamp
CN201310837Y (en) * 2008-11-19 2009-09-16 达昌电子科技(苏州)有限公司 Connecting and positioning protective sleeve for liquid crystal display backlight tube
CN201744903U (en) * 2010-06-09 2011-02-16 南通星维油泵油嘴有限公司 Positioning fixture for refining plane

Similar Documents

Publication Publication Date Title
CN1261685C (en) High pressure fuel spraying pipe with connection head
JP5032610B2 (en) Fuel injection device
US6843275B2 (en) High-pressure fuel injection pipe
KR101015482B1 (en) Connection head structure of high pressure fuel injection tube
US9593654B2 (en) Injector sleeve
US8353272B2 (en) Fuel injection system with compensation element
DE102009051065B3 (en) Fuel distributor
US20040079339A1 (en) Fuel injection system
US7770602B2 (en) Double wall pipe
KR20110010745A (en) Hold-down member for a fuel injection device
DE10333721B4 (en) Fuel rail with a connection piece
EP1509693B1 (en) Fuel injection valve for internal combustion engines
TW201437521A (en) Fluid pressure cylinder
EP1752655B1 (en) A device for connection between a rail for fuel under pressure and at least one injector, for an internal-combustion engine
CZ20023424A3 (en) Sealing arrangement for fuel injection valve
DE102005020380A1 (en) Fuel injection device for internal combustion engine, has fuel injecting valve fastened directly to fuel distribution line by connection body, where valve and body are placed without abutment on surfaces of mounting hole in cylinder head
CN102187082A (en) Thermal protection for fuel injectors
US6789783B2 (en) Fuel injection valve for internal combustion engines
US6575142B2 (en) High-pressure fuel system for internal combustion engines
CN104854341A (en) Piston fuel pump for an internal combustion engine
CN102076955B (en) Decoupling element for fuel injection device
US20060032947A1 (en) Fuel injection valve for internal combustion engines
CN202468115U (en) Symmetrical integral high-pressure common rail pipe
CN201572929U (en) Special-shaped seal groove processing cutter
US7478582B2 (en) High pressure pump and manufacturing process thereof

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20100929