CN102513905A - Auxiliary fixture and method for grinding two planes of valve seat - Google Patents
Auxiliary fixture and method for grinding two planes of valve seat Download PDFInfo
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- CN102513905A CN102513905A CN2011104441334A CN201110444133A CN102513905A CN 102513905 A CN102513905 A CN 102513905A CN 2011104441334 A CN2011104441334 A CN 2011104441334A CN 201110444133 A CN201110444133 A CN 201110444133A CN 102513905 A CN102513905 A CN 102513905A
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- valve seat
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- plane
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Abstract
The invention relates to an auxiliary fixture for grinding two planes of a valve seat. The auxiliary fixture comprises a circular baseplate with a step and a rail arranged on the circular baseplate thereon; four screw holes are distributed in quartering positions of the baseplate and the bottom plane of the rail uniformly; the baseplate and the rail are fixed by connection screws through the screw holes; a through hole is formed in the lateral surface of the rail, so that the screws on the side pass through the through hole, and the valve seat to be ground is fixed. The grinding method comprises the following steps of: cleaning, assembling, putting, fixing the valve seat, grinding the lower plane of the valve seat and grinding the upper plane of the valve seat. The auxiliary fixture ensures the planeness of the two planes of the valve seat, provides a guarantee for the quality of an inner conical valve surface turned by a lathe in the next process, and improves the one-time detection qualified rate of the valve surface of the valve seat, which is subjected to turning finish after the valve seat is disassembled from the lathe.
Description
Technical field
The present invention relates to the precision processing technology field, particularly relate to a kind of auxiliary mould and method thereof that is used for grinding valve seat two planes.
Technical background
Inlet valve seat, delivery valve seat are the flat parts that belongs to thinner thickness, and groundwork face is respectively 120 °, 90 ° an inner cone valve face.The form tolerance of inner cone valve face requires very high, promptly has linearity that the requirement of beating is arranged again.In lathe fine finishining inner cone valve face process, qualified when often finding clinical examination, but after pulling down part from turning attachment, overproof during check, so be a processing difficult problem always.Because, operated the master worker in the past and all be clamping parts by rule of thumb, turning processing, general every batch of part all will be reprocessed through repeated measurement, multiple clamping and could guarantee processing request.
Analyze reason: want to control well the processing effect of inner cone valve face; The clamping benchmark of lathe---part thickness plane must be worked into the requirement of drawing flatness in advance; Otherwise valve seat is clamping deformation on lathe easily, and above-mentioned defective phenomenon appears in the inner cone valve face after causing finally processing.But the processing on the thickness of valve seat two planes, in preceding working procedure---accomplish on the surface grinding machine, flatness error should be able to be controlled according to reason.
Analyze: surface grinding machine relies on the magnechuck magnetic attraction to be adsorbed in workpiece on the workbench, and emery wheel carries out grinding to valve seat thickness plane again.Valve seat is slim part, is easy to torsional deformation.Supposing has a torsional deformation originally; Under the effect of magnetic attraction; The deflection of distortion has been repaired, and two planes after the grinding are in the requirement that meets drawing flatness tolerance 0.02mm that has under the suction situation, but after eliminating electromagnetic attraction; Part becomes torsional deformation again again, causes that the flatness of free state still is bad after the part grinding.The thickness plane of grinding with surface grinding machine is as next procedure---the positioning and clamping benchmark of lathe turning valve face; Directly influence the installation accuracy of lathe; There is clamping deformation again in part, thereby the assay of the inner cone valve face free state after the final turning does not meet drawing requirement exactly.
Summary of the invention
The objective of the invention is to overcome above-mentioned deficiency of the prior art; A kind of auxiliary mould and method thereof that is used for grinding valve seat two planes is provided; Be used for solving surface grinding machine magnechuck magnetic force in the negative effect of process, guarantee the flatness on inlet valve seat and each two plane of delivery valve seat slim part.
The valve face of diesel engine intake valve seat, delivery valve seat and air inlet valve lever, exhasut valve stem match, and therefore, the size of inner cone valve face, form error directly influence intake valve, whether exhaust valve component leaks gas at air inlet, exhaust work state.Fig. 2 is a part at the get on the bus sketch map of inner cone valve face of lathe, and the dolly three-jaw is clamped turning attachment.After part is contained on the vehicle clamper, pressing plate workpiece pressing, car valve face.Suppose the plane out-of-flatness that part contacts with vehicle clamper, so, clinical examination is qualified, unclamps pressing plate, and it is overproof again to pull down behind the part check valve face applying degree.So in order to guarantee that inner cone valve face linearity, runout error after getting off still meet the requirements, the plane that part contacts with vehicle clamper before getting on the bus must be smooth.This vehicle clamper plane of orientation promptly is plane on the valve seat among Fig. 1.
Technical solution of the present invention is following:
A kind of auxiliary mould that is used for grinding valve seat two planes; Its characteristics are; This auxiliary mould comprises that one has the circular base plate of ladder and places the fence on this ladder; Four screw holes respectively are evenly distributed on chassis and fourth class office, fence baseplane respectively, and attachment screw fixes described chassis and fence through this screw hole, and the attachment screw head must not be exposed to the outside, chassis; Be provided with through hole in said fence side, supply the side screw to pass, be used for fixing valve seat to be ground.
Described attachment screw is interior hexagonal holding screw.
Described side screw is a hexagon socket cap head screw.
Circular base plate is used for cutting off, reduce magnechuck magnetic force the magnetic of valve seat is attached effect.
Fence and side screw are used for making valve seat to be fixed on the chassis, and when the surface grinding machine emery wheel cut, valve seat can not move freely.
The structural relation of chassis and fence must satisfy 3 requirements.
First: fence needs to be enclosed within the chassis shoulder especially on the circle.
Second: both matching relationships are matched in clearance, are convenient to frock and in use dismantle cleaning.
The 3rd: the chassis was fixed with being connected through four soket head cap screws of fence.Screw hole is evenly distributed on chassis and fourth class office, fence baseplane, and the center in screw hole hole is to parts center consistent size.
The method for grinding of the auxiliary mould that a kind of two planes that utilize above-mentioned grinding inlet valve seat, delivery valve seat are used, its characteristics are that this method comprises the steps:
1. the cleaning of auxiliary mould: unclamp all screws of this auxiliary mould, with the baseplane that clean cloth is cleaned its all parts, particularly chassis, this face will directly contact with the surface grinding machine work top.Purpose is the trueness error that prevents that dust from causing set of tools, thereby causes the element precision error.
2. the assembling of auxiliary mould: tighten the attachment screw between chassis and fence.
3. putting of auxiliary mould: auxiliary mould is positioned on the surface grinding machine workbench.
4. the cleaning of valve seat: clean the valve seat lower plane.
5. valve seat is placed: plane on the valve seat is downward, and last plane is put in downwards in the auxiliary mould, tightens fence side screw, prepares the grinding lower plane.
6. grinding valve seat lower plane: lower plane all mill good after, unclamp fence side screw, take out valve seat.
7. 4.-6. repeating step until the grinding of the lower plane of accomplishing all valve seats, is moved auxiliary mould from the surface grinding machine workbench.
8. plane on the grinding valve seat: clean the magnechuck surface, the lower plane of valve seat (mill) is downward, directly is put on the surface grinding machine magnechuck, and after holding, plane on the grinding valve seat guarantees the thickness of drawing requirement.
Compared with prior art, beneficial effect of the present invention is following:
(1) owing to adopted the structure on chassis, reduced magnechuck magnetic force the magnetic of valve seat part has been attached effect.
(2) owing to adopted the structure of fence, valve seat is fixed on the chassis, when the surface grinding machine emery wheel cut, the valve seat part can not move freely, and had guaranteed the accuracy of grinding.
(3) solved of the interference of surface grinding machine magnechuck magnetic attraction to slim part shape; Also there is the overproof phenomenon of flatness error after having eliminated valve seat part surface grinding machine processing thickness two sides; Guaranteed the precision of lathe clamping valve seat locating surface, avoided the clamping deformation of part on lathe, the guarantee in early stage finally is provided for lathe turning valve seat inner cone valve face once-forming, single pass check; Promptly effectively guarantee product quality, improved production efficiency again greatly.Product quality and working (machining) efficiency will be relied in the destabilizing factor of master craftsman's experience to free.
(4), improve and check disposable qualification rate after valve seat turning fine finishining valve face is got off for the quality of next procedure lathe turning inner cone valve face provides the prerequisite guarantee.
Description of drawings
Fig. 1 a is inlet valve seat to be processed, delivery valve seat.
Fig. 1 b is that valve seat is a grinding state afterwards.
Fig. 2 is turning attachment clamping, processing valve seat valve face sketch map.
Fig. 3 is that the auxiliary mould that the present invention is used for grinding valve seat two planes is made sketch map in the user mode of surface grinding machine work top.
Among the figure: 1---the surface grinding machine workbench; 2---the chassis; 3---attachment screw; 4---fence; 5---the side screw; 6---part to be processed; 7---surface grinding machine work emery wheel.
Fig. 4 a is the cutaway view on chassis among the present invention.
Fig. 4 b is the vertical view on chassis among the present invention.
Fig. 5 a is the cutaway view of fence among the present invention.
Fig. 5 b is the vertical view of fence among the present invention.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing the present invention is described further, but should limit protection scope of the present invention with this.
See also Fig. 3; Fig. 3 is that the auxiliary mould that the present invention is used for grinding valve seat two planes is made sketch map in the user mode of surface grinding machine work top; As shown in the figure, a kind of auxiliary mould that is used for grinding valve seat two planes comprises a stepped circular base plate 2 and places the fence 4 on this ladder; Four screw holes respectively are evenly distributed on chassis 2 and fourth class office, fence 4 baseplane respectively, and attachment screw 3 makes described chassis 2 fixing with fence 4 through this screw hole; Attachment screw 3 must not be exposed to the outside, chassis.Be provided with through hole in said fence 4 sides, supply side screw 5 to pass, be used for fixing valve seat to be ground.Attachment screw 3 is interior hexagonal holding screw.Side screw 5 is a hexagon socket cap head screw.
In order to make magnechuck magnetic force not play negative metamorphosis to workpiece, keep the flatness situation of free state, so that surface grinding machine finishing flatness just by means of chassis 2, makes valve seat not contact with magnechuck, magnetic force only holds auxiliary mould of the present invention.When magnechuck was worked, valve seat still was a free state, does not receive suction affects.When the emery wheel lengthwise movement, valve seat receives the power consistent with the grinding wheel movement direction in this auxiliary mould, is not having under the situation of fence, and workpiece can be skidded off, so utilize fence 4 and side screw 5 fixedly to surround valve seat.
Fig. 4 a is the cutaway view on chassis among the present invention, and Fig. 4 b is the vertical view on chassis among the present invention.As shown in the figure; The baseplane on chassis and last plane parallel degree require 0.01mm; Because the chassis is positioned on the platen magnechuck; The last plane on chassis promptly is the plane that valve seat is placed, and having only baseplane and last plane parallel degree is the such plane of 0.01mm, could guarantee the depth of parallelism and the flatness on the plane that valve seat grinds under free state.
A kind of method for grinding that utilizes this auxiliary mould comprises the steps:
1. the cleaning of auxiliary mould: unclamp all screws of this auxiliary mould, clean its all parts with clean cloth.Prevent the influence of dust, iron filings, burr to auxiliary mould.Seem trickle error, possibly cause the parallelism of two planes of valve seat processing inaccurate.
2. the assembling of auxiliary mould: tighten the attachment screw 3 between chassis and fence;
3. putting of auxiliary mould: auxiliary mould is positioned on the surface grinding machine workbench 1;
4. the cleaning of valve seat: clean the valve seat lower plane;
5. valve seat is placed: the last plane among Fig. 1 is put in this auxiliary mould; Lower plane upwards; Tighten hexagon socket cap head screw 5 gently; Because inlet valve seat, delivery valve seat are thin-walled parts, be very easy to distortion in stressed back, and the valve face applying degree that processes behind this part deformation can't satisfy drawing requirement.Valve seat cylindrical and fence endoporus (referring to Fig. 5) have certain interval, and the purpose of design is to take out valve seat after making things convenient for the valve seat grinding to accomplish like this.
6. grinding valve seat lower plane: cooling fluid is opened, and emery wheel 7 grinding inlet valve seats, delivery valve seat lower plane are selected grinding scope, speed and the amount of feeding.Because on the valve seat fit with the vehicle clamper location in the following road lathe operation in the plane, according to machining operations ABC, know that promptly the plane is smart benchmark on the valve seat, so the valve seat lower plane is as the thick benchmark processing earlier of surface grinding machine.Lower plane unclamps hexagon socket cap head screw 5 after all grinding well, takes out valve seat.
7. 4.-6. repeating step until the grinding of the lower plane of accomplishing all valve seats, is moved auxiliary mould from the surface grinding machine workbench;
8. plane on the grinding valve seat: clean the magnechuck surface, the last plane of valve seat upwards, the lower plane of the valve seat that grind is downward, directly is put on the surface grinding machine magnechuck, after holding, inlet valve seat is controlled, delivery valve seat thickness gets final product in plane on the grinding valve seat.
Go up the plane flatness with the blue powder check and whether meet drawing requirement, assay meets fully.
Show that through on probation use the utility model auxiliary mould, inlet valve seat, delivery valve seat only need stand up the grinding that once just can accomplish two planes.Traditional method for grinding need be through repeatedly standing up grinding, and the plane that grinds can only guarantee the flatness requirement as far as possible, can not satisfy drawing requirement fully, and the flatness quality on valve seat thickness plane is uncontrollable.Bring many troubles for following one lathe turning inner cone valve face, need to rely on master craftsman's rich experience and repeatedly check the ability turning of doing over again to go out to satisfy the inner cone valve face of drawing requirement.And this auxiliary mould is simple in structure, and is with low cost, simple to operate, realizes high efficiency production.
Claims (4)
1. auxiliary mould that is used for grinding valve seat two planes; It is characterized in that; This auxiliary mould comprises that one has the circular base plate (2) of ladder and places the fence (4) on this ladder; Four screw holes respectively are evenly distributed on chassis (2) and fourth class office, fence (4) baseplane respectively, and attachment screw (3) fixes described chassis (2) and fence (4) through this screw hole; Be provided with through hole in said fence (4) side, supply side screw (5) to pass, be used for fixing valve seat to be ground.
2. the auxiliary mould that is used for grinding valve seat two planes according to claim 1 is characterized in that, described attachment screw (3) is interior hexagonal holding screw.
3. the auxiliary mould that is used for grinding valve seat two planes according to claim 1 is characterized in that, described side screw (5) is a hexagon socket cap head screw.
4. method for grinding that utilizes the described auxiliary mould of claim 1, its characteristics are that this method comprises the steps:
1. the cleaning of auxiliary mould: unclamp all screws of this auxiliary mould, clean its all parts with clean cloth;
2. the assembling of auxiliary mould: tighten the attachment screw (3) between chassis and fence;
3. putting of auxiliary mould: auxiliary mould is positioned on the surface grinding machine workbench (1);
4. the cleaning of valve seat: clean the valve seat lower plane;
5. valve seat is placed: plane on the valve seat is downward, and last plane is put in downwards in the auxiliary mould, tightens fence side screw (5), prepares the grinding lower plane;
6. grinding valve seat lower plane: lower plane all mill good after, unclamp side screw (5), take out valve seat;
7. 4.-6. repeating step until the grinding of the lower plane of accomplishing all valve seats, is moved auxiliary mould from the surface grinding machine workbench;
8. plane on the grinding valve seat: clean the magnechuck surface, the lower plane of the valve seat that ground is downward, directly is put on the surface grinding machine magnechuck, and after holding, plane on the grinding valve seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104441334A CN102513905A (en) | 2011-12-27 | 2011-12-27 | Auxiliary fixture and method for grinding two planes of valve seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104441334A CN102513905A (en) | 2011-12-27 | 2011-12-27 | Auxiliary fixture and method for grinding two planes of valve seat |
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| Publication Number | Publication Date |
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| CN102513905A true CN102513905A (en) | 2012-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104441334A Pending CN102513905A (en) | 2011-12-27 | 2011-12-27 | Auxiliary fixture and method for grinding two planes of valve seat |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112276118A (en) * | 2020-09-30 | 2021-01-29 | 贵州安大航空锻造有限责任公司 | Planetary gear carrier cutting machining method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4567695A (en) * | 1983-03-29 | 1986-02-04 | Ina Walzlager Schaeffler Kg | Method and apparatus for machining roller bearings |
| CN201841421U (en) * | 2009-12-31 | 2011-05-25 | 德阳市东联机械成套设备厂 | Vertically-lathing tooling for brake disk of wind-driven generator |
| CN201872022U (en) * | 2010-11-29 | 2011-06-22 | 大连名阳实业有限公司 | Fixture for grinding inner bore of thin-wall component |
| CN201916294U (en) * | 2010-12-28 | 2011-08-03 | 台州职业技术学院 | Regulation and location mechanism for slender part |
| CN201979328U (en) * | 2011-04-12 | 2011-09-21 | 杭州千岛湖陆行泵业有限公司 | Clamp of eccentric bushing |
| CN102198612A (en) * | 2011-04-29 | 2011-09-28 | 滁州兴达机电有限公司 | Quick workpiece wedging mechanism |
-
2011
- 2011-12-27 CN CN2011104441334A patent/CN102513905A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4567695A (en) * | 1983-03-29 | 1986-02-04 | Ina Walzlager Schaeffler Kg | Method and apparatus for machining roller bearings |
| CN201841421U (en) * | 2009-12-31 | 2011-05-25 | 德阳市东联机械成套设备厂 | Vertically-lathing tooling for brake disk of wind-driven generator |
| CN201872022U (en) * | 2010-11-29 | 2011-06-22 | 大连名阳实业有限公司 | Fixture for grinding inner bore of thin-wall component |
| CN201916294U (en) * | 2010-12-28 | 2011-08-03 | 台州职业技术学院 | Regulation and location mechanism for slender part |
| CN201979328U (en) * | 2011-04-12 | 2011-09-21 | 杭州千岛湖陆行泵业有限公司 | Clamp of eccentric bushing |
| CN102198612A (en) * | 2011-04-29 | 2011-09-28 | 滁州兴达机电有限公司 | Quick workpiece wedging mechanism |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112276118A (en) * | 2020-09-30 | 2021-01-29 | 贵州安大航空锻造有限责任公司 | Planetary gear carrier cutting machining method |
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Application publication date: 20120627 |