CN203853835U - Clamp for machining of positioning pin hole of cylinder cover of engine - Google Patents

Clamp for machining of positioning pin hole of cylinder cover of engine Download PDF

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Publication number
CN203853835U
CN203853835U CN201420227394.XU CN201420227394U CN203853835U CN 203853835 U CN203853835 U CN 203853835U CN 201420227394 U CN201420227394 U CN 201420227394U CN 203853835 U CN203853835 U CN 203853835U
Authority
CN
China
Prior art keywords
hole
base
cylinder cover
processing
fixture
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.)
Expired - Fee Related
Application number
CN201420227394.XU
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Chinese (zh)
Inventor
马小磊
周全刚
李玉奎
李东波
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.)
Weichai Power Co Ltd
Original Assignee
Weichai Power Co Ltd
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 Weichai Power Co Ltd filed Critical Weichai Power Co Ltd
Priority to CN201420227394.XU priority Critical patent/CN203853835U/en
Application granted granted Critical
Publication of CN203853835U publication Critical patent/CN203853835U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a clamp for machining of a positioning pin hole of a cylinder cover of an engine. The clamp for machining of the positioning pin hole of the cylinder cover of the engine comprises a base, wherein a positioning mechanism and a clamping mechanism are arranged on the base, the positioning mechanism comprises a positioning claw which can be installed in an air inlet valve seat mouth of the cylinder cover in a clamped mode and an expansion mechanism which can be installed in an air channel mouth of the cylinder cover in a clamped mode, and the clamping mechanism comprises a pressing claw which can be installed on the top surface of the cylinder cover in a pressed mode so as to tightly press the cylinder cover onto the base. According to the clamp for machining of the positioning pin hole of the cylinder cover of the engine, the air inlet channel valve seat mouth, with the highest workblank precision, of the cylinder cover and an exhaust channel mouth, with the highest workblank precision, of the cylinder cover are used for positioning for machining of the positioning pin hole, the positioning precision is high, machining deviation, caused by nonuniformity of workblanks is avoided, allowance distribution for machining in the subsequent stages is guaranteed, and hidden dangers such as water leakage or gas leakage caused by thin wall of the inner cavity of the cylinder cover are avoided. The clamp for machining of the positioning pin hole of the cylinder cover of the engine is simple in structure and fast and convenient to operate, the clamping way is effective, and thus the machining precision of the positioning pin hole of the cylinder cover is effectively guaranteed.

Description

For processing the fixture of engine cylinder cap dowel hole
Technical field
The utility model relates to a kind of for processing the fixture of engine cylinder cap dowel hole.
Background technology
Cylinder head is the important component part of engine, so the machining of cylinder head is most important.In cylinder head processing, the processing of dowel hole is to guarantee that the first of cylinder head machining accuracy is also a most important procedure.Inner-cavity structure more complicated due to cylinder head, if dowel hole processing partially, the surplus that can affect rear operation processing is distributed, and may cause cylinder head inner chamber somewhere wall thin, under the severe situations such as engine high-temperature high pressure, there is inner chamber to break and cause the hidden danger of leaking or leaking gas.Therefore, how guaranteeing the machining accuracy in cylinder head dowel pin hole, is the problem that first will consider in the machining of cylinder head.Present technical scheme is generally to utilize the surrounding black skin of cylinder head or end face etc. to position processing, such as patents such as Granted publication CN 101879680 B, CN 102729066 A.Because the peripheric surface casting accuracy of cylinder head blank is not high, can cause the processing of dowel hole to be offset than theoretical value.
Summary of the invention
The technical problems to be solved in the utility model be to provide a kind of positioning precision high for processing the fixture of engine cylinder cap dowel hole.
For solving the problems of the technologies described above, the utility model comprises base, base is provided with detent mechanism and clamp mechanism, it is characterized in that described detent mechanism comprises the locating detent that can be installed on cylinder head air intake duct valve seat mouth and the tension mechanism that can be installed on cylinder-head port mouth, thereby described clamp mechanism comprises that can be fitted in cylinder head end face is pressed on the paw on base by cylinder head.
Described base upper surface is fixed with two block length strip back-up blocks along fore-and-aft direction, and two back-up blocks are symmetrical set, and the outside portion of every back-up block is provided with guide plate, and the height of described guide plate is higher than the height of back-up block.
Described back-up block is interval with groove along fore-and-aft direction, and described back-up block is provided with and is fixedly mounted with hole at groove.
Described base is all fixed with block at the corresponding every back-up block of rear side.
Described paw is moved up and down by the clamping cylinder driving being fixed on base.
Described paw is provided with the pressure head being made of copper.
Described locating detent is fixed on location-plate, and described location-plate is moved up and down by the positional cylinder driving being fixed on base.
On described location-plate, be connected with the guider that can location-plate be moved up and down and be play the guiding role, described guider is fixed on base.
Described locating detent is taper, and it is interval with a plurality of fins on the conical surface, and the maximum gauge of described locating detent is greater than the diameter of air intake duct valve seat mouth.
Described tension mechanism comprises the positioning seat setting gradually from bottom to top, flat board and tensioner pawl, positioning seat is fixed on base, the upper surface of positioning seat is symmetrical set two steady pins, the bottom of positioning seat is provided with tensioner cylinder accommodation space, the rear portion of positioning seat be provided with for the piston rod of tensioner cylinder through and pilot hole that piston rod is led, the piston rod of tensioner cylinder passes pilot hole and in its end, is fixed with the contiguous block of stretching, on contiguous block, be connected with horizontally disposed flat board, dull and stereotyped upper surface is provided with the alignment pin of stretching on two, two alignment pins are symmetrical, the corresponding steady pin of flat back is provided with the hole that sees through that is strip, see through the length in hole and the castor of tensioner pawl from adapting, tensioner pawl is two, and it is symmetrical set, the body of each tensioner pawl be provided with for steady pin, pass slip hole and the fixing hole passing for alignment pin, described slip hole comprises vertical section and the bending segment that bends laterally.
Adopt after said structure, the utility model is according to principle of six-point fixing, utilize air intake duct valve seat mouth and the exhaust road junction that cylinder head blank precision is the highest to position to process dowel hole, positioning precision is higher, avoided the dowel hole causing because of blank problem of non-uniform to process partially, after guaranteeing, the surplus of operation processing is distributed, and avoids the hidden danger of breaking and leaking or leak gas because of the thin inner chamber causing of cylinder head internal chamber wall.Tension mechanism is symmetrical structure, and its center line overlaps with cylinder head center line, and two tensioner pawls can synchronously stretch in exhaust duct and while spreading is located cylinder head, guarantees the correct position of cylinder head after clamping.The utility model is simple in structure, convenient to operation, and clamping mode is effective, thereby effectively guarantees the machining accuracy in cylinder head dowel pin hole.
Accompanying drawing explanation
Below in conjunction with the drawings and the specific embodiments, the utility model is described in further detail:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the top view of Fig. 1;
Fig. 3 is perspective view of the present utility model;
Fig. 4 is the structural representation of the utility model clamping cylinder lid;
Fig. 5 is the structural representation of tension mechanism;
Fig. 6 is the structural representation of Fig. 5 tensioner pawl spreading;
Fig. 7 is the perspective view of Fig. 5;
Fig. 8 is tension mechanism and exhaust road junction Tensioning structure schematic diagram;
Fig. 9 is the structural representation of positioning seat;
Figure 10 is tensioner cylinder and dull and stereotyped syndeton schematic diagram;
Figure 11 is the structural representation of tensioner pawl;
Figure 12 is dull and stereotyped structural representation.
The specific embodiment
Air flue is the important component part of engine, by free form surface, formed, complex-shaped, the characteristic of its circulation is having a strong impact on the performance of diesel engine, and air flue generally no longer carries out machining, therefore, air flue is the highest place of cylinder head blank casting accuracy, due to the air inlet road junction of cylinder head not at cylinder head center and exhaust road junction in cylinder head in the heart, so the exhaust road junction 15 that the utility model utilization is positioned at the air intake duct valve seat mouth at cylinder head top and is positioned at cylinder head sidepiece positions.
As shown in Figures 1 to 12, for processing the fixture of engine cylinder cap dowel hole, comprise base 1, the left and right sides of base 1 offers respectively the holddown groove 11 of a plurality of monolateral openings, base 1 is provided with detent mechanism and clamp mechanism, detent mechanism comprises the locating detent 51 that can be installed on cylinder head air intake duct valve seat mouth and the tension mechanism that can be installed on cylinder head exhaust road junction 15, thereby clamp mechanism comprises that can be fitted in cylinder head end face is pressed on the paw 7 on base 1 by cylinder head.
Base 1 upper surface is fixed with two block length strip back-up blocks 2 along fore-and-aft direction, two back-up blocks 2 are symmetrical set, the outside portion of every back-up block 2 is provided with the guide plate 23 consistent with back-up block 2 length, the height of guide plate 23 is higher than the height of back-up block 2, thereby the left and right sides of cylinder head is positioned.Guide plate 23 can be made integrative-structure with back-up block 2.Every back-up block 2 is interval with groove 21 along fore-and-aft direction, and be provided with and be fixedly mounted with hole 22 at groove 21 places, by wearing bolt back-up block 2 is packed on base 1 being fixedly mounted with 22 places, hole, the setting of groove 21 also can conveniently be discharged the iron filings that produce in process, guarantees cylinder head positioning precision.Base 1 is all fixed with block 8 at the corresponding every back-up block 2 of rear side, and the position of 8 pairs of cylinders of block is carried out spacing.
Base 1 upper surface is respectively equipped with clamping cylinder 72 in the both sides of back-up block 2, on the piston rod of clamping cylinder 72, be connected with paw 7, paw 7 press-fits end and stretches out to back-up block 2 sides, the bottom surface that paw 7 press-fits end is provided with the pressure head 71 being made of copper, due to the self-characteristic of copper, this kind of pressure head 71 damage to cylinder head when clamping cylinder covers is little.
Locating detent 51 is fixed on location-plate 5, location-plate 5 is fixed on the piston rod of positional cylinder 53, and drive and move up and down by positional cylinder 53, location-plate 5 links stretch out left and are connected with the guider 4 that can location-plate 5 be moved up and down and be play the guiding role, guider 4 is prior art, does not repeat them here.
In the present embodiment, locating detent 51 is taper, its from the bottom to top diameter increase gradually, locating detent 51 is interval with three fins 52 on the conical surface, by fin 52 is set, make locating detent 51 and air intake duct valve seat mouth contact and change line into and contact by face, thereby make locating detent 51 better be inserted into air flue valve seat mouth, position, the maximum gauge on locating detent 51 tops is greater than the diameter of air intake duct valve seat mouth, thereby effectively cylinder head is positioned.In the utility model, locating detent 51 also can redesign according to the concrete condition of part, can be designed to spring detent or other structures.
The end that press-fits of location-plate 5 and paw 7 be arranged in parallel with link, press-fits end and is connected by a montant with link, and the location-plate 5 of this kind of structure or paw 7 can be applied to the power of positional cylinder 52 or clamping cylinder 72 outputs in cylinder head better, and what press-fit is tighter.
Base 1 upper surface is fixed with tension mechanism between two blocks 8, thereby tension mechanism comprises and stretches into the tensioner pawl that spreading positions cylinder head behind cylinder head exhaust road junction.In the present embodiment, the concrete structure of tension mechanism is as follows: it comprises the positioning seat 9 be arrangeding in parallel successively from bottom to top, flat board 3 and tensioner pawl 6, 9 pairs of flat boards 3 of positioning seat and tensioner pawl 6 support, positioning seat 9 is fixed on base 1, the left and right sides of positioning seat 9 offers respectively the holddown groove 11 of a plurality of monolateral openings, the upper surface of positioning seat 9 is symmetrical set two steady pins 91, the bottom of positioning seat 9 is provided with tensioner cylinder accommodation space, the rear portion of positioning seat 9 be provided with for the piston rod 12 of tensioner cylinder 10 through and pilot hole 92 that piston rod 12 is led, the piston rod of tensioner cylinder 10 passes pilot hole 92 and in its end, is fixed with the contiguous block 13 of stretching, on contiguous block 13, be connected with horizontally disposed dull and stereotyped 3, the upper surface of positioning seat 9 contacts with dull and stereotyped 3 bottom surface, thereby 9 pairs of flat boards 3 of positioning seat support.It is symmetrical that the front end of dull and stereotyped 3 upper surfaces is provided with 31, two alignment pins 31 of alignment pin of stretching on two, the corresponding steady pin 91 in rear end of dull and stereotyped 3 upper surfaces be provided be strip see through hole 32, see through the length in hole 32 and the castor of tensioner pawl 6 from adapting.Tensioner pawl 6 is two, it is symmetrical set, the body of each tensioner pawl 6 be provided with for steady pin 91, pass slip hole 62 and the fixing hole 61 passing for alignment pin 31, the slightly larger in diameter of fixing hole 61 is in the diameter of alignment pin 31, slip hole 62 comprises vertical section and bending segment, vertically the length of section need guarantee that the length that tensioner pawl protracts can just in time enter cylinder head exhaust duct, thereby the length of bending segment guarantees tensioner pawl 6, can clamp cylinder head exhaust duct by spreading, realizes tensioner.During tension mechanism assembling, steady pin 91 passes dull and stereotyped 3 the slip hole 62 that sees through hole 32 and tensioner pawl 6 successively, thereby alignment pin 31 is fixed tensioner pawl 6 through the fixing hole 61 of tensioner pawl 6, during tensioner, the piston rod 12 of tensioner cylinder 10 is retracted forward, thereby making two alignment pins 31 drive two tensioner pawls 6 to move forward extend in cylinder head exhaust duct, positioning seat 9 is motionless, two steady pins 91 slide into after bending segment gradually by the tensioner of tensioner pawl 6 front ends 63 spreading along slip hole 62, thereby realize tensioner location.
The medial surface of tensioner pawl 6 rear ends is inclined-plane, and two tensioner pawls 6 are when original state, and You compare great gap, its rear end, prevents that both interfere rear end when tensioner pawl 6 is promoted to travel forward by tensioner cylinder 10.
The utility model is according to principle of six-point fixing, and its using method is as follows:
cylinder head 14 is pushed or pulled on back-up block 2, and it is spacing that cylinder head 14 left and right sides are directed to plate 23, after block 8 is encountered in cylinder head 14 rear ends, stops, and now two rotary freedoms of cylinder head 14 vertical direction one-movement-freedom-degrees and along continuous straight runs are locked;
after cylinder head 14 puts in place, positional cylinder 53 drives location-plate 5 to decline, and locating detent 51 inserts cylinder head 14 air intake duct valve seat mouths, and two one-movement-freedom-degrees of cylinder head 14 horizontal direction are limited;
tensioner cylinder 10 drives tension mechanism effect by the both sides tensioner of exhaust duct, limits cylinder head 14 rotary freedom vertically;
so far, the six-freedom degree of cylinder head 14 all limits, and the position of cylinder head 14 is fixed.Two clamping cylinders 72 fall simultaneously, and cylinder head 14 is compressed.
The utility model is according to principle of six-point fixing, utilize air intake duct valve seat mouth and the exhaust road junction 15 that cylinder head blank precision is the highest to position to process dowel hole, positioning precision is higher, avoided the dowel hole causing because of blank problem of non-uniform to process partially, after guaranteeing, the surplus of operation processing is distributed, and avoids the hidden danger of breaking and leaking or leak gas because of the thin inner chamber causing of cylinder head internal chamber wall.Tension mechanism is symmetrical structure, and its center line overlaps with cylinder head center line, and two tensioner pawls 6 can synchronously stretch in exhaust duct and while spreading is located cylinder head, guarantees the correct position of cylinder head after clamping.The utility model is simple in structure, convenient to operation, and clamping mode is effective, thereby effectively guarantees the machining accuracy in cylinder head dowel pin hole.
The utility model is not limited to the processing of cylinder head, and similarly box parts, also can be used the utility model to process.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model.Previous embodiment has been described in detail the utility model, and for a person skilled in the art, its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement.In every case within inventive concept scope of the present utility model, any modification of making, be equal to replacement, improvement etc., within being all included in protection domain of the present utility model.

Claims (10)

1. one kind for processing the fixture of engine cylinder cap dowel hole, comprise base, base is provided with detent mechanism and clamp mechanism, it is characterized in that described detent mechanism comprises the locating detent that can be installed on cylinder head air intake duct valve seat mouth and the tension mechanism that can be installed on cylinder-head port mouth, thereby described clamp mechanism comprises that can be fitted in cylinder head end face is pressed on the paw on base by cylinder head.
2. according to claim 1 for processing the fixture of engine cylinder cap dowel hole, it is characterized in that described base upper surface is fixed with two block length strip back-up blocks along fore-and-aft direction, two back-up blocks are symmetrical set, the outside portion of every back-up block is provided with guide plate, and the height of described guide plate is higher than the height of back-up block.
3. according to claim 2 for processing the fixture of engine cylinder cap dowel hole, it is characterized in that described back-up block is interval with groove along fore-and-aft direction, described back-up block is provided with and is fixedly mounted with hole at groove.
4. according to claim 2 for processing the fixture of engine cylinder cap dowel hole, it is characterized in that described base is all fixed with block at the corresponding every back-up block of rear side.
5. according to claim 1 for processing the fixture of engine cylinder cap dowel hole, it is characterized in that described paw is moved up and down by the clamping cylinder driving being fixed on base.
6. according to claim 5 for processing the fixture of engine cylinder cap dowel hole, it is characterized in that described paw is provided with the pressure head being made of copper.
7. according to claim 1 for processing the fixture of engine cylinder cap dowel hole, it is characterized in that described locating detent is fixed on location-plate, described location-plate is moved up and down by the positional cylinder driving being fixed on base.
8. according to claim 7 for processing the fixture of engine cylinder cap dowel hole, it is characterized in that being connected with the guider that can location-plate be moved up and down and be play the guiding role on described location-plate, described guider is fixed on base.
9. according to claim 8 for processing the fixture of engine cylinder cap dowel hole, it is characterized in that described locating detent is taper, it is interval with a plurality of fins on the conical surface, and the maximum gauge of described locating detent is greater than the diameter of air intake duct valve seat mouth.
According to described in claim 1 to 9 any one for processing the fixture of engine cylinder cap dowel hole, it is characterized in that described tension mechanism comprises the positioning seat setting gradually from bottom to top, flat board and tensioner pawl, positioning seat is fixed on base, the upper surface of positioning seat is symmetrical set two steady pins, the bottom of positioning seat is provided with tensioner cylinder accommodation space, the rear portion of positioning seat be provided with for the piston rod of tensioner cylinder through and pilot hole that piston rod is led, the piston rod of tensioner cylinder passes pilot hole and in its end, is fixed with the contiguous block of stretching, on contiguous block, be connected with horizontally disposed flat board, dull and stereotyped upper surface is provided with the alignment pin of stretching on two, two alignment pins are symmetrical, the corresponding steady pin of flat back is provided with the hole that sees through that is strip, see through the length in hole and the castor of tensioner pawl from adapting, tensioner pawl is two, and it is symmetrical set, the body of each tensioner pawl be provided with for steady pin, pass slip hole and the fixing hole passing for alignment pin, described slip hole comprises vertical section and the bending segment that bends laterally.
CN201420227394.XU 2014-05-06 2014-05-06 Clamp for machining of positioning pin hole of cylinder cover of engine Expired - Fee Related CN203853835U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420227394.XU CN203853835U (en) 2014-05-06 2014-05-06 Clamp for machining of positioning pin hole of cylinder cover of engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420227394.XU CN203853835U (en) 2014-05-06 2014-05-06 Clamp for machining of positioning pin hole of cylinder cover of engine

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CN203853835U true CN203853835U (en) 2014-10-01

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104384804A (en) * 2014-11-19 2015-03-04 深圳市大族激光科技股份有限公司 Impeller blade and impeller upper plate laser welding method and clamping method and jig
CN104589111A (en) * 2014-11-27 2015-05-06 芜湖福马汽车零部件有限公司 Punching fixture for air suction valve base
CN105171371A (en) * 2015-10-20 2015-12-23 成都飞机工业(集团)有限责任公司 Clamping head
CN105922037A (en) * 2016-06-08 2016-09-07 广东长盈精密技术有限公司 Fixture and air pressure detection mechanism thereof
CN106424520A (en) * 2016-10-20 2017-02-22 安徽会合智能设备有限公司 Brake shoe clamping mechanism applied to brake shoe riveting press
CN106493536A (en) * 2016-12-14 2017-03-15 上海君屹工业自动化股份有限公司 A kind of insulating boot assemble mechanism
CN110076597A (en) * 2019-05-24 2019-08-02 芜湖永裕汽车工业股份有限公司 Engine cylinder cap oil sealing hole and camshaft hole fixture for processing and processing method
CN113263312A (en) * 2021-07-16 2021-08-17 成都飞机工业(集团)有限责任公司 Airplane frame positioning structure based on tolerance distribution and process method

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104384804A (en) * 2014-11-19 2015-03-04 深圳市大族激光科技股份有限公司 Impeller blade and impeller upper plate laser welding method and clamping method and jig
CN104589111A (en) * 2014-11-27 2015-05-06 芜湖福马汽车零部件有限公司 Punching fixture for air suction valve base
CN105171371A (en) * 2015-10-20 2015-12-23 成都飞机工业(集团)有限责任公司 Clamping head
CN105922037A (en) * 2016-06-08 2016-09-07 广东长盈精密技术有限公司 Fixture and air pressure detection mechanism thereof
CN106424520A (en) * 2016-10-20 2017-02-22 安徽会合智能设备有限公司 Brake shoe clamping mechanism applied to brake shoe riveting press
CN106424520B (en) * 2016-10-20 2018-06-01 安徽航大智能科技有限公司 A kind of brake-shoe clamp system applied to brake-shoe riveter
CN106493536A (en) * 2016-12-14 2017-03-15 上海君屹工业自动化股份有限公司 A kind of insulating boot assemble mechanism
CN110076597A (en) * 2019-05-24 2019-08-02 芜湖永裕汽车工业股份有限公司 Engine cylinder cap oil sealing hole and camshaft hole fixture for processing and processing method
CN113263312A (en) * 2021-07-16 2021-08-17 成都飞机工业(集团)有限责任公司 Airplane frame positioning structure based on tolerance distribution and process method

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GR01 Patent grant
EXPY Termination of patent right or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20141001

Termination date: 20150506