CN107160290A - End face precision, the high efficient grinding fixture of positioning are grouped based on screw thread - Google Patents
End face precision, the high efficient grinding fixture of positioning are grouped based on screw thread Download PDFInfo
- Publication number
- CN107160290A CN107160290A CN201710325348.1A CN201710325348A CN107160290A CN 107160290 A CN107160290 A CN 107160290A CN 201710325348 A CN201710325348 A CN 201710325348A CN 107160290 A CN107160290 A CN 107160290A
- Authority
- CN
- China
- Prior art keywords
- positioning
- screw thread
- injector body
- oil injector
- face
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
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Classifications
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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
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
Abstract
The invention discloses a kind of end face precision, high efficient grinding fixture that positioning is grouped based on screw thread, including：Support (1) and the multiple oil injector body positioning holes being arranged on support (1), each oil injector body positioning hole top is installed by supporting positioning bushing (2), oil injector body loads in oil injector body positioning hole through supporting positioning bushing (2), screw thread positioning sleeve (3) is installed at the top of supporting positioning bushing (2), it is threadedly coupled between external screw thread and the internal thread of screw thread positioning sleeve (3) at the top of oil injector body, realizes the location and installation to oil injector body.The present invention is simple in construction, and manufacturing cost is low, and clamping workpiece is safe and reliable, positioning precision is high, drastically increases production efficiency, has reached the purpose of " efficient ", meets multi items, the batch production requirements of polytypic engine fuel injector body.
Description
Technical field
The invention belongs to fuel injector processing tool technical field, be related to a kind of end face that positioning is grouped based on screw thread it is accurate,
High efficient grinding fixture.
Background technology
The function of fuel injector is the passage for controlling fuel oil to enter combustion chamber.And oil injector body is then the important composition of fuel injector
One of part, its function be injection pump supply fuel oil enter oil injector body after, high pressure effect under, by middle pad (or oil filter
Couple) enter pintle nozzle match-ing parts, and sprayed into and formed in combustion chamber with HTHP air with good atomization quality by the regular hour
Good combustion mixture, meets the performance indications requirement of engine.For this oil injector body and middle pad (or oil filter couple)
End face seal is the timing of influence high pressure fuel, quantitative key.The high-power engine oil injector body sealing of multi items model
End face design diagram is shown in Fig. 1, oil injector body total length≤115mm；The seal face A at the top of the oil injector body of different model
Size to the step end face B at middle part is 31~52mm；Fastening thread M is M20~M24, and pitch 1.5mm, accuracy of thread G is 5h
~6h；Seal face A surface roughness Ra 0.16um, seal face A are 0.05mm to the perpendicularity of fastening thread, and require close
End-blocking face A flatness optical parallel instrument inspection must not more than three interference fringes.The high precision design of seal face require to
Processing brings certain difficulty, if seal face existing defects, and the supply of the course of work intermediate fuel oil error occurs and starts influence
Machine Performance And Reliability.
Original processing scheme is the precision turning that screw thread and end face are completed using turning center clamped one time, then passes through precision
The screw thread positioning grinding end face not being grouped.
The major technique defect of original processing scheme is：
(1) the screw thread positioning and clamping part not being grouped using precision, positioning precision is low, it is impossible to fully meet seal face
Requirement on machining accuracy, causes seal face overproof to the perpendicularity of fastening thread, quality stability is poor.
(2) single-piece clamping oil injector body, low production efficiency are used, it is impossible to meet the requirement of batch production.
The content of the invention
(1) technical problem to be solved
The technical problem to be solved in the present invention is：Develop a kind of end face accurate grinding folder that positioning is grouped based on accuracy of thread
Tool, and more than one piece installation way is used, it is adapted to the processing of multi items model engine fuel injector body seal face, it is accurate fixed to reach
Position, efficiently production, the purpose of accurate grinding, meet the seal face grinding of Multiple Type engine fuel injector body, it is ensured that batch
Production requirement.
(2) technical scheme
In order to solve the above-mentioned technical problem, the present invention provides a kind of end face precision, high efficient mill that positioning is grouped based on screw thread
Fixture is cut, it includes：Support 1 and the multiple oil injector body positioning holes being arranged on support 1, each oil injector body positioning hole top
Supporting positioning bushing 2 is installed, oil injector body loads in oil injector body positioning hole through supporting positioning bushing 2, supporting positioning bushing 2
Top is installed to be threadedly coupled between external screw thread and the internal thread of screw thread positioning sleeve 3 at the top of screw thread positioning sleeve 3, oil injector body, real
Now to the location and installation of oil injector body.
Wherein, after the supporting positioning bushing 2 and screw thread positioning sleeve 3 are arranged on support 1, both top end face C
Progress polishes processing, realizes top end face C Surface 0.2~0.4um of roughness Ra, and it is tolerance value that top end face C, which is located at distance,
0.03~0.05mm and parallel between support baseplane benchmark D two parallel planes.
Wherein, the support 1 uses material for grey cast-iron, on support plane F be located at distance for tolerance value 0.01~
0.03mm and parallel between support baseplane benchmark D two parallel planes.
Wherein, it is described supporting positioning bushing 2 bottom end face E be located at distance for 0.03~0.05mm of tolerance value and parallel to
Between support baseplane benchmark D two parallel planes.
Wherein, in the fastening thread of the screw thread positioning sleeve 3 through axis be located at distance for 0.03~0.05mm of tolerance value and
Between support baseplane benchmark D two parallel planes.
Wherein, the installation on the supporting positioning bushing 2 and support between oil injector body positioning hole is coordinated using gap, spray
0.2~0.4um of oily body positioning hole surface roughness Ra.
Wherein, the installation between the screw thread positioning sleeve 3 and supporting positioning bushing 2 uses interference fits, and supporting positioning
It is used for the hole surface 0.4~0.8um of roughness Ra for installing screw thread positioning sleeve 3 on bushing 2, it is public affairs that the baseplane G in hole, which is located at distance,
Between 0.005~0.01mm of difference and two parallel planes for installing centerline hole perpendicular to screw thread positioning sleeve.
Wherein, the screw thread positioning sleeve upper surface J and lower surface K 0.4~0.8um of surface roughness Ra, and upper surface J and
The planes of lower surface K two are between two parallel planes that distance is 0.005~0.01mm of tolerance value and is passed through in screw thread.
Wherein, the screw thread positioning sleeve 3 is designed as internal thread hole M20~M24 seriation positioning sleeve.
Wherein, 8 oil injector body positioning holes are set on the support 1.
(3) beneficial effect
End face precision, high efficient grinding fixture that positioning is grouped based on screw thread that above-mentioned technical proposal is provided, devise one
The fixture mount of secondary 8 oil injector bodies of clamping, drastically increases production efficiency, has reached the purpose of " efficient ", meet many
The batch production requirements of kind, polytypic engine fuel injector body；The seriation screw thread positioning bushing of different size is devised, it is full
Foot the oil injector body end face accurate grinding of multi items engine different sizes, strong adaptability；And employ grouped in screw thread
Positioning, greatly improves the positioning precision of workpiece, has reached the purpose of " be accurately positioned, accurate grinding "；Clamp structure is simple, system
Cause low, clamping workpiece is safe and reliable, positioning precision is high, its end face precision mill that positioning is grouped based on accuracy of thread invented
Fixture is cut, with certain originality and advance.
Brief description of the drawings
Fig. 1 is multi items model high-power engine oil injector body seal face design diagram in the prior art.
Fig. 2 is fixture general illustration of the embodiment of the present invention, and b figures are the top view of a figures.
Fig. 3 is fixture mount schematic diagram of the embodiment of the present invention, and b figures are the top view of a figures.
Fig. 4 is supporting positioning bushing schematic diagram of the embodiment of the present invention.
Fig. 5 is screw thread positioning sleeve schematic diagram of the embodiment of the present invention, and b figures are the top view of a figures.
Embodiment
To make the purpose of the present invention, content and advantage clearer, with reference to the accompanying drawings and examples, to the present invention's
Embodiment is described in further detail.
(1) application environment
Process equipment corresponding to the present embodiment fixture uses universal vertical surface grinding machine.
(2) fixture General layout Plan
Analyzed according to Fig. 1, the benchmark of the top seal face A perpendicularity requirement of oil injector body is fastening thread central diameter, position
The middle bench upper surface B that size is part is put, chuck designs should be positioned with the fastening thread of oil injector body, limited with step
Position；Simultaneously in order to meet batch production requirements, according to the disk size of process equipment, 8 workpiece of clamped one time.
The present embodiment clamp structure is shown in Fig. 2, including support 1 and the multiple oil injector body positioning holes being arranged on support 1, often
Supporting positioning bushing 2 is installed on individual oil injector body positioning hole top, and oil injector body loads oil injector body through supporting positioning bushing 2 to be determined
In the hole of position, the interior of external screw thread at the top of screw thread positioning sleeve 3, oil injector body and screw thread positioning sleeve 3 is installed at supporting positioning bushing 2 top
It is threadedly coupled between screw thread, realizes the location and installation to oil injector body.
In the present embodiment, 8 oil injector body positioning holes are set simultaneously on support 1.
For the uniformity of 8 oil injector body cross grinding sizes ensureing clamped one time, all supportings position the Hes of bushing 2
After screw thread positioning sleeve 3 is arranged on support 1, both top end face C carry out polishing processing, realize that top end face C Surface is thick
Rugosity Ra0.2~0.4um, and it is 0.03~0.05mm of tolerance value and flat parallel to support bottom that top end face C, which must be positioned at distance,
Between face benchmark D two parallel planes；Must be positioned at distance through axis in the fastening thread of screw thread positioning sleeve 3 is tolerance value 0.03
~0.05mm and between support baseplane benchmark D two parallel planes；The bottom end face E of supporting positioning bushing 2 is necessary
Between two parallel planes positioned at distance for 0.03~0.05mm of tolerance value and parallel to support baseplane benchmark D.
(2) fixture mount scheme
The support Design of fixture is shown in Fig. 3, and main function is that supporting positions bushing 2 and screw thread positioning sleeve 3, and clamping fuel injector
Body realizes end face accurate grinding.It is clamped one time 8 according to process equipment disk specifications design support to improve processing efficiency
Oil injector body.
Support uses material for grey cast-iron, and casting retrogressing is fought abrasive jet cleaning；According to the length ruler of different oil injector bodies
Very little and grinding size uniformity, design support total height is 115 ± 0.02mm；In order to ensure the fixture overall precision after assembling
It is required that, the installation on supporting positioning bushing 2 and support between oil injector body positioning hole is coordinated using gap, oil injector body positioning hole
0.2~0.4um of surface roughness Ra, and on support plane F must be positioned at distance for 0.01~0.03mm of tolerance value and parallel to
Between support baseplane benchmark D two parallel planes.
(3) bushing scheme is positioned
Positioning bushing conceptual design is shown in Fig. 4, and main function is support thread positioning sleeve 3, realizes the different screw threads of oil injector body
The quick-replaceable of central diameter positioning and clamping.Material is used for high-quality tool steel, by quenching reach heat treatment hardness for 53~
58HRC；According to the different length of multi items oil injector body design supporting positioning bushing overall height dimension h, screw thread positioning sleeve 3 and branch
The installation held between positioning bushing 2 uses interference fits, to ensure to be used to pacify in the accuracy of positioning, and supporting positioning bushing 2
Hole surface 0.4~0.8um of roughness Ra of screw thread positioning sleeve 3 is filled, it is tolerance value 0.005 that the baseplane G in hole, which must be positioned at distance,
Between~0.01mm and two parallel planes for installing centerline hole perpendicular to screw thread positioning sleeve.
(4) screw thread positioning sleeve scheme
Screw thread positioning sleeve conceptual design is shown in Fig. 5, and main function is mounted on supporting positioning bushing 2, improves the pitch diameter of thread
Positioning and clamping realizes the accurate grinding of oil injector body end face.The part is the key component of jig Design, and the accuracy of screw thread positioning is straight
Connect the grinding accuracy for having influence on oil injector body end face.Therefore, using material for high-hardenability, high rigidity, high-wearing feature and quenching
Indeformable high carbon alloy tool steel, reaches that heat treatment hardness is 60~64HRC by quenching；In order to ensure the dress of fixture entirety
With precision, screw thread positioning sleeve 3 is installed and uses interference fits, and gap value is 0.016mm, and the magnitude of interference is 0.025mm；Screw thread positioning sleeve
Upper surface J and lower surface K 0.4~0.8um of surface roughness Ra, and it is tolerance value 0.005 that J and the planes of K two, which must be positioned at distance,
Between~0.01mm and two parallel planes passed through in screw thread；In order to meet the grinding of different series oil injector body, screw thread
Positioning sleeve 3 is designed as internal thread hole M20~M24 seriation positioning sleeve, and enters luggage with the supporting positioning bushing of different height
With using, while to ensure screw thread positioning precision, according to oil injector body pitch diameter of thread size, by the pitch diameter of thread of positioning sleeve
2~3 groups are designed as, central diameter group size is shown in Table 1, and requires screw thread accumulated error ＜ 0.005mm, surface roughness
Ra0.2~0.4um.
The pitch diameter of thread group size of the screw thread positioning sleeve of table 1
During using the present embodiment fixture, fixture is mounted on equipment disk and locked first, according to the different spiral shells of oil injector body
Line central diameter size is installed and tightened, and grinding is carried out after 8 oil injector bodies are clamping.
The present embodiment has following distinguishing feature：
(1) fixture mount of 8 oil injector bodies of clamped one time has been invented, production efficiency is drastically increased, reached " high
The purpose of effect ", meets multi items, the batch production requirements of polytypic engine fuel injector body.
(2) the seriation screw thread positioning bushing of different size has been invented, the spray of multi items engine different size is met
Oily body end face accurate grinding, strong adaptability；And grouped positioning in screw thread is employed, greatly improve the positioning accurate of workpiece
Degree, has reached the purpose of " be accurately positioned, accurate grinding ".
(3) clamp structure is simple, and manufacturing cost is low, and clamping workpiece is safe and reliable, positioning precision is high, its invent based on
The end face precise grinding clamp of accuracy of thread packet positioning, with certain originality and advance.
By producing checking, the fixture is easy to use, and workpiece positioning security is reliable；Processing efficiency is improved on the basis of original
8 times, product qualification rate has reached 100%.The inventive technique is given birth to applied to the batch of all model injector bodies of diesel engines
Production, 8000 accounting of production outline, 2880h when can save table of equipment, save more than 40 ten thousand yuan of expense per year.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, some improvement and deformation can also be made, these improve and deformed
Also it should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of end face precision, high efficient grinding fixture that positioning is grouped based on screw thread, it is characterised in that including：Support (1) and set
Multiple oil injector body positioning holes on support (1) are put, supporting positioning bushing (2) is installed on each oil injector body positioning hole top,
Oil injector body loads in oil injector body positioning hole through supporting positioning bushing (2), and screw thread is installed at the top of supporting positioning bushing (2) and is determined
It is threadedly coupled, is realized to fuel injector between external screw thread and the internal thread of screw thread positioning sleeve (3) at the top of position set (3), oil injector body
The location and installation of body.
2. end face precision, the high efficient grinding fixture as claimed in claim 1 that positioning is grouped based on screw thread, it is characterised in that institute
After supporting positioning bushing (2) and screw thread positioning sleeve (3) are stated on support (1), both top end face C carry out polishing place
Reason, realize top end face C Surface 0.2~0.4um of roughness Ra, and top end face C be located at distance for tolerance value 0.03~
0.05mm and parallel between support baseplane benchmark D two parallel planes.
3. end face precision, the high efficient grinding fixture as claimed in claim 2 that positioning is grouped based on screw thread, it is characterised in that institute
State support (1) and use material for grey cast-iron, plane F is located at distance for 0.01~0.03mm of tolerance value and parallel to branch on support
Between frame baseplane benchmark D two parallel planes.
4. end face precision, the high efficient grinding fixture as claimed in claim 2 that positioning is grouped based on screw thread, it is characterised in that institute
The bottom end face E for stating supporting positioning bushing (2) is located at distance for 0.03~0.05mm of tolerance value and parallel to support baseplane base
Between quasi- D two parallel planes.
5. end face precision, the high efficient grinding fixture as claimed in claim 2 that positioning is grouped based on screw thread, it is characterised in that institute
State and be located at distance for 0.03~0.05mm of tolerance value through axis in the fastening thread of screw thread positioning sleeve (3) and put down perpendicular to support bottom
Between face benchmark D two parallel planes.
6. end face precision, the high efficient grinding fixture as claimed in claim 2 that positioning is grouped based on screw thread, it is characterised in that institute
State the installation on supporting positioning bushing (2) and support between oil injector body positioning hole using gap to coordinate, oil injector body positioning hole
0.2~0.4um of surface roughness Ra.
7. end face precision, the high efficient grinding fixture as claimed in claim 6 that positioning is grouped based on screw thread, it is characterised in that institute
State the installation between screw thread positioning sleeve (3) and supporting positioning bushing (2) and use interference fits, and supporting is positioned and used on bushing (2)
In the hole surface 0.4~0.8um of roughness Ra for installing screw thread positioning sleeve (3), it is tolerance value that the baseplane G in hole, which is located at distance,
Between 0.005~0.01mm and two parallel planes for installing centerline hole perpendicular to screw thread positioning sleeve.
8. end face precision, the high efficient grinding fixture as claimed in claim 7 that positioning is grouped based on screw thread, it is characterised in that institute
State screw thread positioning sleeve upper surface J and lower surface K 0.4~0.8um of surface roughness Ra, and upper surface J and the planes of lower surface K two position
Between two parallel planes that distance passes through for 0.005~0.01mm of tolerance value and in screw thread.
9. end face precision, the high efficient grinding fixture as claimed in claim 8 that positioning is grouped based on screw thread, it is characterised in that institute
State the seriation positioning sleeve that screw thread positioning sleeve (3) is designed as internal thread hole M20~M24.
10. end face precision, the high efficient grinding fixture of positioning are grouped based on screw thread as claimed in any one of claims 1-9 wherein, its
It is characterised by, 8 oil injector body positioning holes is set on the support (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710325348.1A CN107160290A (en) | 2017-05-10 | 2017-05-10 | End face precision, the high efficient grinding fixture of positioning are grouped based on screw thread |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710325348.1A CN107160290A (en) | 2017-05-10 | 2017-05-10 | End face precision, the high efficient grinding fixture of positioning are grouped based on screw thread |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107160290A true CN107160290A (en) | 2017-09-15 |
Family
ID=59812571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710325348.1A Pending CN107160290A (en) | 2017-05-10 | 2017-05-10 | End face precision, the high efficient grinding fixture of positioning are grouped based on screw thread |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107160290A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4545152A (en) * | 1982-03-10 | 1985-10-08 | Maschinenfabrik Gehring, Gmbh & Co. Kommanditgesellschaft | Grinding apparatus |
| CN2724925Y (en) * | 2004-08-19 | 2005-09-14 | 梁意 | Oil atomizer multifunction universal clamp |
| CN203527246U (en) * | 2013-10-31 | 2014-04-09 | 烟台福尔精密机械有限公司 | Fixture applicable to cutting and grinding process of end surface of oil injector |
| CN204221596U (en) * | 2014-10-21 | 2015-03-25 | 江苏新银叶传动机电有限公司 | Grinder dress in multistation high precision numerical control end |
| CN205630303U (en) * | 2016-04-15 | 2016-10-12 | 重庆川仪自动化股份有限公司 | Optical locating frock is thrown to hole of precious stone pipe |
-
2017
- 2017-05-10 CN CN201710325348.1A patent/CN107160290A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4545152A (en) * | 1982-03-10 | 1985-10-08 | Maschinenfabrik Gehring, Gmbh & Co. Kommanditgesellschaft | Grinding apparatus |
| CN2724925Y (en) * | 2004-08-19 | 2005-09-14 | 梁意 | Oil atomizer multifunction universal clamp |
| CN203527246U (en) * | 2013-10-31 | 2014-04-09 | 烟台福尔精密机械有限公司 | Fixture applicable to cutting and grinding process of end surface of oil injector |
| CN204221596U (en) * | 2014-10-21 | 2015-03-25 | 江苏新银叶传动机电有限公司 | Grinder dress in multistation high precision numerical control end |
| CN205630303U (en) * | 2016-04-15 | 2016-10-12 | 重庆川仪自动化股份有限公司 | Optical locating frock is thrown to hole of precious stone pipe |
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Application publication date: 20170915 |