CN108145411B - EGR valve assembly production line and assembly method thereof - Google Patents
EGR valve assembly production line and assembly method thereof Download PDFInfo
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- CN108145411B CN108145411B CN201711476697.XA CN201711476697A CN108145411B CN 108145411 B CN108145411 B CN 108145411B CN 201711476697 A CN201711476697 A CN 201711476697A CN 108145411 B CN108145411 B CN 108145411B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims description 18
- 238000003466 welding Methods 0.000 claims abstract description 61
- 238000012360 testing method Methods 0.000 claims abstract description 53
- 238000007789 sealing Methods 0.000 claims abstract description 50
- 230000007246 mechanism Effects 0.000 claims abstract description 10
- 238000009434 installation Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000000498 cooling water Substances 0.000 claims description 6
- 241000463219 Epitheca Species 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 230000006872 improvement Effects 0.000 description 13
- 230000008569 process Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
- B23P19/027—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same using hydraulic or pneumatic means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automatic Assembly (AREA)
Abstract
The invention discloses an EGR valve assembly production line, which comprises a locating piece press-fitting device (1), a valve plate welding device, a vacuum actuator manual mounting table, a valve shell leakage testing device, an upper shell mounting device, an integral leakage testing device and a conveyor belt (2), wherein the locating piece press-fitting device (1), the valve plate welding device, the vacuum actuator manual mounting table, the valve shell leakage testing device, the upper shell mounting device, the integral leakage testing device and the conveyor belt (2) are sequentially arranged, a fixture clamp (3) is arranged on the conveyor belt (2), the fixture clamp (3) clamps a valve shell (4.1) to sequentially pass through the devices so as to complete the assembly of an EGR valve, the locating piece press-fitting device (1) comprises a press-fitting table (1.1) and a press-fitting mechanism arranged in the press-fitting table (1.1), and the press-fitting mechanism comprises a liner sleeve press-fitting structure (1.2), a gasket main liner press-fitting structure (1.3), a sealing ring press-fitting structure (1.4) and a retainer press-fitting structure (1.5). The invention provides an EGR valve assembly production line capable of assembling an EGR valve, in particular to an EGR valve assembly production line capable of accurately and rapidly installing a positioning piece at a valve rod.
Description
Technical Field
The invention relates to the field of automobile EGR valve production machinery, in particular to an EGR valve assembly production line and an assembly method thereof.
Background
As is well known, EGR has been increasingly used in the field of emission control of internal combustion engines as an emission control measure that is low in cost, has little modification to the engine itself, and is effective in reducing NOx. In the process of engine operation, part of exhaust gas is introduced into an air inlet pipe, mixed with fresh air or atomized mixed gas and then enters an engine cylinder for re-combustion. This method is an effective measure for reducing NOx and emission.
The EGR valve comprises a cavity, a valve rod and a valve plate are arranged at the cavity to separate or communicate the cavity, the working performance of the EGR valve is determined due to the matching tightness of the valve plate and the cavity, the EGR valve is assembled by a plurality of parts, the existing production line cannot meet the assembly requirement of the EGR valve, particularly the positioning and mounting precision of the valve rod where the valve plate is located is required to be very accurate, the parts at the valve rod are numerous, and the existing assembly production line cannot assemble the parts at the valve rod accurately and rapidly.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the EGR valve assembly production line can assemble an EGR valve, and particularly can accurately and quickly install a positioning piece at a valve rod.
The invention solves the problems by adopting the following technical scheme: an EGR valve assembly line, its characterized in that: including setting up setting element pressure equipment device, valve block welding set, vacuum actuator manual mount table, valve casing reveal testing arrangement, epitheca installation device, whole testing arrangement, conveyer belt of revealing in order, be equipped with frock clamp on the conveyer belt, frock clamp centre gripping valve casing is equipped with the assembly of EGR valve in order through above-mentioned device in order, setting element pressure equipment device includes the pressure equipment platform, establishes the pressure equipment mechanism in the pressure equipment platform, the pressure equipment mechanism includes lining cover pressure equipment structure, gasket main lining cover pressure equipment structure, sealing washer pressure equipment structure, keeps piece pressure equipment structure, be equipped with the pilot hole in the valve casing, the pressure equipment subassembly is with lining cover, gasket and main lining, sealing washer, keeps the piece to be pressed in the pilot hole in order.
Compared with the prior art, the invention has the advantages that: the conveying belt conveys valve casings on the tool clamp to sequentially pass through each assembly device of the EGR valve assembly production line, and the assembly device comprises a positioning piece press-fitting device and a positioning piece press-fitting device, wherein the positioning piece press-fitting device is used for installing five parts in assembly holes of the valve casings corresponding to the valve rods; the vacuum actuator manual installation table is used for manually installing the vacuum actuator on one side of the valve casing; the valve plate welding device is used for inserting a valve rod into the assembly hole, placing the valve plate into the cavity of the valve housing, and then welding the valve housing and the valve plate; the valve shell leakage testing device is used for testing the sealing performance of the partition of the cavity after the valve plate and the valve rod are assembled; an upper shell mounting device; the upper shell is used for assembling the upper shell and the valve shell and comprises a locating pin and an automatic screw feeding device; the whole leakage testing device is used for supplying air to the air inlet of the EGR valve to test the tightness of an air path of the EGR valve, supplying air to the cooling water inlet of the EGR valve to test the tightness of a water path of the EGR valve, and assembling the EGR valve through an EGR valve assembling production line.
As an improvement of the invention, the inner liner press-fitting structure comprises a first push rod, the head of the first push rod is provided with a first boss for placing the inner liner, the periphery of the first boss is provided with a first supporting sleeve for being matched with an inner hole of the inner liner, by the improvement, the first push rod is used for pushing the inner liner on the first boss into the assembly hole, and the first supporting sleeve is used for supporting the inner liner so as to ensure that the inner liner is coaxial with the assembly hole in the process of loading the inner liner.
In addition, the gasket main bushing press-fitting structure comprises a second push rod, the head of the second push rod is provided with a second boss for placing the main bushing and the gasket, the second boss is provided with an expansion sleeve for keeping the axis of the main bushing consistent with the axis of the second push rod, the second boss is also provided with a second support sleeve for being matched with an inner hole of the gasket, by the improvement, the second push rod is used for placing the main bushing and the gasket on the second boss into the assembly hole, the expansion sleeve is used for keeping the axis of the main bushing consistent with the axis of the assembly hole in the process of placing the main bushing, and the second support sleeve is used for keeping the axis of the gasket consistent with the axis of the assembly hole in the process of placing the gasket.
As a further improvement of the invention, the main bushing is internally provided with a conical hole, the expansion sleeve comprises two annular bodies sleeved on the second boss and a plurality of elastic pieces which are arranged between the two annular bodies and elastically bulge outwards along the radial direction of the annular bodies, the elastic pieces are arranged at intervals along the circumferential direction of the annular bodies and are propped against the inner wall of the conical hole, and by the improvement, if the hole in the main bushing is the conical hole, the axis of the main bushing cannot be aligned with the axis of the assembly hole if only the main bushing is placed on the second boss, so that the main bushing is inclined in the loading process to influence the accurate assembly of the subsequent valve rod, the expansion sleeve is arranged, and the elastic pieces of the expansion sleeve are arranged at intervals along the circumferential direction of the second boss and are propped against the inner wall of the conical hole, so that the axis of the main bushing is consistent with the axis of the assembly hole.
As a further improvement of the invention, the seal ring press-fitting structure comprises a third push rod, the head of the third push rod is provided with a third boss for placing the seal ring, the third boss is also provided with a retaining sleeve, the retaining sleeve is provided with a retaining hole for abutting against the outer wall of the seal ring, the diameter of the retaining hole is smaller than that of the mounting hole, the retaining sleeve abuts against the third push rod elastically through a first spring, by the improvement, the third push rod is used for placing the seal ring into the mounting hole, and since the seal ring is tightly matched with the inner wall of the mounting hole after being placed into the mounting hole, the outer wall of the seal ring is slightly smaller than that of the mounting hole, if the seal ring is placed on the second boss only, the outer wall of the seal ring is easy to be damaged when being placed into the mounting hole, so that the retaining sleeve is arranged to limit the outer diameter of the seal ring, the diameter of the retaining sleeve is smaller than the inner diameter of the mounting hole, during assembly, the third push rod pushes the retaining sleeve and the third boss to align with the mounting hole in the valve housing, the retaining sleeve abuts against the valve housing, the third push rod continues to push the third push the seal ring into the mounting hole, and the diameter of the seal ring returns to the original position after the retaining sleeve is in the original position due to the fact that the diameter of the retaining sleeve is smaller than the diameter of the mounting hole, and the diameter of the seal ring is completely restored to the original position after the spring is placed into the mounting hole.
According to the invention, the outer wall of the third push rod is provided with a guide post in a protruding mode, the retaining sleeve is provided with a guide groove which is used for being matched with the guide post to prevent the retaining sleeve and the third boss from rotating relatively along the circumferential direction, and the guide groove is matched with the guide post through the improvement, so that the fact that the third push rod and the retaining sleeve rotate relatively during relative movement but the outer ring and the inner ring of the sealing ring rotate relatively is avoided, and therefore the sealing performance of the sealing ring is affected.
As a further improvement of the invention, the holding sheet press-fitting structure comprises a fourth push rod, the head of the fourth push rod is provided with a fourth boss for placing the holding sheet, a fourth supporting sleeve for matching with the inner hole of the holding sheet is further arranged outside the fourth boss, by the improvement, the fourth push rod is used for placing the holding sheet into the assembly hole, and the fourth supporting sleeve is used for keeping the axis of the holding sheet consistent with the axis of the assembly hole in the process of placing the holding sheet.
As a further improvement of the present invention, the liner press-fitting structure includes a first push rod, the gasket main liner press-fitting structure includes a second push rod, the seal ring press-fitting structure includes a third push rod, the holding piece press-fitting structure includes a fourth push rod, the first push rod is driven by a first pneumatic rail provided on the press-fitting stage, the second push rod is driven by a second pneumatic rail provided on the press-fitting stage, the third push rod is driven by a third pneumatic rail provided on the press-fitting stage, the fourth push rod is driven by a fourth pneumatic rail provided on the press-fitting stage, and a second spring is provided between the press-fitting stage and the third pneumatic rail, and by the improvement, since the seal ring and the holding piece are both in close fit with the fitting hole, a second spring is provided after pushing the third pneumatic rail of the third push rod and the fourth pneumatic rail of the fourth push rod to assist the return of the third push rod and the fourth push rod to the initial position after the assembly.
As an improvement of the invention, the mounting table is provided with a servo structure for sequentially moving the liner sleeve press-fitting structure, the gasket main liner press-fitting structure, the sealing ring press-fitting structure and the retaining sheet press-fitting structure to the arrangement aligned with the assembly holes.
The invention adopts another technical scheme for solving the problems as follows: an assembling method of an EGR valve assembling production line comprises the following steps,
a, mounting a valve shell into a fixture, and moving the fixture to a positioning piece press-mounting device by a conveyor belt;
b, an operator places the inner bushing on the first boss, places the main bushing and the gasket on the second boss, places the sealing ring on the third boss, places the retaining sheet on the fourth boss, and then starts the positioning piece press-fitting device to operate;
c, the first pneumatic guide rail moves the first push rod of the inner liner sleeve press-fit structure into the assembly hole of the valve housing, and the inner liner sleeve is installed in the assembly hole;
d, the second pneumatic guide rail moves the second push rod of the gasket main bushing press-fit structure into the assembly hole of the valve housing, and the gasket and the main bushing are installed into the assembly hole;
e, the third pneumatic guide rail moves the third push rod of the seal ring press-fitting structure into the assembly hole of the valve housing, and the seal ring is installed in the assembly hole;
f, the fourth pneumatic guide rail moves the fourth push rod of the holding piece press-fitting structure into the assembly hole of the valve housing, and the holding piece is installed in the assembly hole;
g, the conveyor belt continues to convey, and the valve shell with the positioning piece is conveyed to a valve plate welding device;
h, inserting the valve rod into the assembly hole, and loading the valve plate into the cavity of the valve casing and propping against the valve rod;
i, valve block welding set welds valve block and valve rod in order to fix each other, includes: the first welding, the welding power is adjusted to 200W, and the welding depth is a first welding line of 0 mm-0.2 mm; the second welding, the welding power is adjusted to 900W, the first welding line is melted, and the second welding line with the total depth of 1.8 mm-2.3 mm is welded;
j, the conveying belt moves the tool clamp to a manual installation table of the vacuum actuator, and an operator manually installs the vacuum actuator on the valve housing;
k, the conveying belt moves the tool clamp to a valve casing leakage testing device, the valve casing leakage testing device ventilates the valve casing, and the sealing performance of the valve plate and the cavity of the valve casing is tested;
and l, the conveying belt moves the tool clamp to an upper shell mounting device, an operator manually places the upper shell on the valve shell, and the upper shell mounting device presses the locating pin into the valve shell and screws the locating pin to fix the locating pin.
m, the conveyer belt removes frock clamp to whole testing arrangement that reveals, and whole testing arrangement carries out the test of water route sealing performance and the test of gas circuit sealing performance to the whole after the assembly, including the air feed in order to test the leakproofness of EGR valve gas circuit to the air inlet department of EGR valve, carries out the air feed in order to test the leakproofness of EGR valve water route to the cooling water import department of EGR valve.
Compared with the prior art, the invention has the advantages that: the conveying belt conveys valve casings on the tool clamp to sequentially pass through each assembly device of the EGR valve assembly production line, and the assembly device comprises a positioning piece press-fitting device and a positioning piece press-fitting device, wherein the positioning piece press-fitting device is used for installing five parts in assembly holes of the valve casings corresponding to the valve rods; the vacuum actuator manual installation table is used for manually installing the vacuum actuator on one side of the valve casing; the valve plate welding device is used for inserting a valve rod into the assembly hole, placing the valve plate into the cavity of the valve housing, and then welding the valve housing and the valve plate; the valve shell leakage testing device is used for testing the sealing performance of the partition of the cavity after the valve plate and the valve rod are assembled; an upper shell mounting device; the upper shell is used for assembling the upper shell and the valve shell and comprises a locating pin and an automatic screw feeding device; the integral leakage testing device is used for supplying air to the air inlet of the EGR valve to test the tightness of an air path of the EGR valve, one jin of air is supplied to the cooling water inlet of the EGR valve to test the tightness of a water path of the EGR valve, the EGR valve is assembled through an EGR valve assembly production line, and five parts of an inner bushing, a gasket, a main bushing, a sealing ring and a retaining sheet are required to be installed in an assembly hole, so that the five parts are accurately and quickly installed in the assembly hole in sequence through the positioning piece press-fitting device;
the valve rod is arranged in the assembly hole, the valve plate is arranged in the cavity and is propped against the valve rod, the valve plate and the valve rod are welded through the valve plate welding device, the welding seam of the welding position of the valve plate and the valve rod is deeper, if the one-time welding is completed, air bubbles are easily generated at the bottom of the welding seam due to the fact that the temperature of the valve plate and the valve rod is lower, the valve plate is in cold joint and is not fixed firmly, the original one-time welding is replaced by the two-time welding, the welding power of the first welding is 200W, the depth is smaller than 0mm to 0.2mm, the welding seam is used for heating and pre-welding the joint of the valve plate and the valve rod, the air bubbles are not easy to generate, the power is increased to 900W during the second welding, the welding liquid flows to the place with higher temperature due to the fact that the first welding position has a certain temperature during the first welding, and the welding seam of the first welding position is melted, and the total depth is 1.8mm to 2.3mm, the welding seam is not easy to generate air bubbles, and the welding is firm;
and through two sealing performance tests, namely, the first sealing test ventilates the valve casing for the valve casing leakage testing device, and tests the sealing performance of the cavity of the valve plate and the valve casing, and the second sealing test is the test of the waterway sealing performance and the air path sealing performance of the assembled whole by the whole leakage testing device, so that the sealing performance is ensured, the mode that the prior art only has one whole test is replaced, and the air path sealing performance is poor, because the assembly precision is not high in the assembly process of the upper shell and the valve casing or the valve plate and the cavity are not firmly sealed, the reason that the sealing performance is not required can not be accurately obtained only through one whole test, and if the valve plate and the cavity are not firmly sealed, defective products are removed, the next upper shell installation step is avoided, and unnecessary procedure waste is reduced in the valve casing leakage testing device.
Drawings
Fig. 1 is a schematic diagram of the whole structure of a positioning member press-fitting device.
Fig. 2 is a schematic diagram of the whole structure of the press-fitting mechanism.
Fig. 3 is a schematic cross-sectional structure of the press-fitting structure of the inner liner.
Fig. 4 is a schematic cross-sectional structure of a gasket main bushing press-fitting structure.
Fig. 5 is a schematic cross-sectional structure of a press-fitting structure of a seal ring.
Fig. 6 is a schematic sectional structure of the holding sheet press-fitting structure.
Fig. 7 is a schematic diagram of the overall structure of the EGR valve.
Fig. 8 is a schematic view showing a sectional structure of an EGR valve fitting hole.
Fig. 9 is a schematic diagram of a cross-sectional structure of a welding part of a valve rod and a valve plate of the EGR valve.
1-positioning piece press fitting device, 1.1-press fitting table, 1.2-inner liner press fitting structure, 1.2.1-first push rod, 1.2.2-first boss, 1.2.3-first support sleeve, 1.3-gasket main liner press fitting structure, 1.3.1-second push rod, 1.3.2-second boss, 1.3.3-expansion sleeve, 1.3.3.1-body, 1.3.3.2-elastic sheet, 1.3.4-second support sleeve, 1.4-seal ring press fitting structure, 1.4.1-third push rod, 1.4.2-third boss, 1.4.3-retaining sleeve, 1.4.4-retaining hole, 1.4.5-first spring, 1.4.6-guide post, 1.4.7-guide groove, 1.5-retaining sheet press fitting structure, 1.5.1-fourth push rod, 1.5.2-fourth boss, 1.5.3-fourth supporting sleeve, 1.6-first pneumatic guide rail, 1.7-second pneumatic guide rail, 1.8-third pneumatic guide rail, 1.9-fourth pneumatic guide rail, 1.10-second spring, 1.11-servo structure, 1.11.1-servo motor, 1.11.2-lead screw, 2-conveyor belt, 3-tool clamp, 4-EGR valve, 4.1-valve housing, 4.1.1-assembly hole, 4.2-inner liner, 4.3-gasket, 4.4-main liner, 4.5-sealing ring, 4.6-holding piece, 4.7-valve rod, 4.8-valve plate, 4.9-cavity, 4.10-vacuum actuator, 4.11-upper shell, 4.12-screw, 4.13-air inlet, 4.14-cooling water inlet, 5-first welding seam, 6-second welding seam.
Detailed Description
As shown in figures 1 to 9 of the drawings,
an EGR valve assembly line, its characterized in that: including setting up setting element press-fit device 1, valve block welding set, vacuum actuator manual mount table, valve casing reveal testing arrangement, epitheca installation device, whole test device, conveyer belt 2 reveal, be equipped with frock clamp 3 on the conveyer belt 2, frock clamp 3 centre gripping valve casing 4.1 is in order through the assembly of above-mentioned device in order with accomplishing the EGR valve, setting element press-fit device 1 includes press-fit table 1.1, establishes the press-fit mechanism in press-fit table 1.1, press-fit mechanism includes inside lining cover press-fit structure 1.2, gasket main bushing press-fit structure 1.3, sealing washer press-fit structure 1.4, keeps piece press-fit structure 1.5, be equipped with pilot hole 4.1.1 in the valve casing 4.1, press-fit assembly is with inside lining 4.2, gasket 4.3 and main bushing 4.4, sealing washer 4.5, keeps piece 4.6 to impress in pilot hole 4.1.1 in order.
The inner liner press-fitting structure 1.2 comprises a first push rod 1.2.1, a first boss 1.2.2 used for placing an inner liner 4.2 is arranged at the head of the first push rod 1.2.1, and a first supporting sleeve 1.2.3 used for being matched with an inner hole of the inner liner 4.2 is arranged at the periphery of the first boss 1.2.2.
The gasket main bushing press-fitting structure 1.3 comprises a second push rod 1.3.1, a second boss 1.3.2 used for placing a main bushing 4.4 and a gasket 4.3 is arranged at the head of the second push rod 1.3.1, an expansion sleeve 1.3.3 used for keeping the axis of the main bushing 4.4 consistent with the axis of the second push rod 1.3.1 is arranged at the second boss 1.3.2, and a second support sleeve 1.3.4 used for being matched with an inner hole of the gasket 4.3 is further arranged at the second boss 1.3.2.
Wherein, be equipped with the bell mouth in the main bush 4.4, the tight cover that expands 1.3.3 is including the cover establish two annular body 1.3.3.1 on second boss 1.3.2 and establish along the radially outwards protruding elastic slice 1.3.3.2 of annular body 1.3.3.1 between two annular body 1.3.3.1, elastic slice 1.3.3.2 is a plurality of and along the circumference interval setting of annular body 1.3.3.1, elastic slice 1.3.3.2 offsets with the inner wall in bell mouth.
The sealing ring press-fitting structure 1.4 comprises a third push rod 1.4.1, a third boss 1.4.2 used for placing a sealing ring 4.5 is arranged at the head of the third push rod 1.4.1, a retaining sleeve 1.4.3 is further arranged outside the third boss 1.4.2, the retaining sleeve 1.4.3 is provided with a retaining hole 1.4.4 used for propping against the outer wall of the sealing ring 4.5, the diameter of the retaining hole 1.4.4 is smaller than that of the assembly hole 4.1.1, and the retaining sleeve 1.4.3 and the third push rod 1.4.1 are elastically propped against each other through a first spring 1.4.5.
The outer wall of the third push rod 1.4.1 is provided with a guide post 1.4.6 in a protruding mode, and the retaining sleeve 1.4.3 is provided with a guide groove 1.4.7 which is used for being matched with the guide post 1.4.6 to prevent the retaining sleeve 1.4.3 and the third boss 1.4.2 from rotating relatively along the circumferential direction.
The holding sheet press-fitting structure 1.5 comprises a fourth push rod 1.5.1, a fourth boss 1.5.2 used for placing the holding sheet 4.6 is arranged at the head of the fourth push rod 1.5.1, and a fourth supporting sleeve 1.5.3 used for being matched with an inner hole of the holding sheet 4.6 is further arranged outside the fourth boss 1.5.2.
The gasket main liner press-fitting structure 1.3 comprises a second push rod 1.3.1, the sealing ring press-fitting structure 1.4 comprises a third push rod 1.4.1, the retaining piece press-fitting structure 1.5 comprises a fourth push rod 1.5.1, the first push rod 1.2.1 is driven by a first pneumatic guide rail 1.6 arranged on the press-fitting table 1.1, the second push rod 1.3.1 is driven by a second pneumatic guide rail 1.7 arranged on the press-fitting table 1.1, the third push rod 1.4.1 is driven by a third pneumatic guide rail 1.8 arranged on the press-fitting table 1.1, the fourth push rod 1.5.1 is driven by a fourth pneumatic guide rail 1.9 arranged on the press-fitting table 1.1, and a second spring 1.10 is arranged between the press-fitting table 1.1 and the third pneumatic guide rail 1.8 and between the press-fitting table 1.1 and the fourth pneumatic guide rail 1.9.
The mounting table is provided with a servo structure 1.11 for sequentially moving the liner sleeve press-fitting structure 1.2, the gasket main liner press-fitting structure 1.3, the sealing ring press-fitting structure 1.4 and the retaining piece press-fitting structure 1.5 to the alignment assembly hole 4.1.1, the servo structure 1.11 comprises a servo motor 1.11.1 and a lead screw 1.11.2, and the lead screw 1.11.2 rotates in the press-fitting table 1.1 to accurately drive the press-fitting table 1.1 to move along the axial direction of the lead screw 1.11.2.
An assembly method of an EGR valve assembly line, characterized in that: it comprises the following steps of the method,
b, mounting the valve housing 4.1 into the fixture 3, and moving the fixture 3 to the positioning piece press-mounting device 1 by the conveyor belt 2;
b, an operator places the inner bushing 4.2 on the first boss 1.2.2, the main bushing 4.4 and the gasket 4.3 on the second boss 1.3.2, the sealing ring 4.5 on the third boss 1.4.2, the retaining piece 4.6 on the fourth boss 1.5.2, and then the positioning piece press-fitting device 1 is started to operate;
c, the first pneumatic guide rail 1.6 moves the first push rod 1.2.1 of the inner liner pressing structure 1.2 into the assembly hole 4.1.1 of the valve casing 4.1, and the inner liner 4.2 is assembled into the assembly hole 4.1.1;
d, the second pneumatic guide rail 1.7 moves the second push rod 1.3.1 of the gasket main bushing press-fit structure 1.3 into the assembly hole 4.1.1 of the valve casing 4.1, and the gasket 4.3 and the main bushing 4.4 are assembled into the assembly hole 4.1.1;
e, the third pneumatic guide rail 1.8 moves the third push rod 1.4.1 of the sealing ring press-fitting structure 1.4 into the assembly hole 4.1.1 of the valve casing 4.1, and the sealing ring 4.5 is installed into the assembly hole 4.1.1;
f, the fourth pneumatic guide rail 1.9 moves the fourth push rod 1.5.1 of the holding piece press-fitting structure 1.5 into the assembly hole 4.1.1 of the valve casing 4.1, and the holding piece 4.6 is assembled into the assembly hole 4.1.1;
g, the conveyor belt 2 continues to convey, and the valve casing 4.1 with the positioning piece is conveyed to a valve plate welding device;
h, inserting the valve rod 4.7 into the assembly hole 4.1.1, and loading the valve plate 4.8 into the cavity 4.9 of the valve casing 4.1 and propping against the valve rod 4.7;
i, valve block welding set welds valve block 4.8 and valve rod 4.7 in order to be fixed each other, includes: a first welding process, wherein the welding power is adjusted to 200W, and the welding depth is 0 mm-0.2 mm; the second welding, the welding power is adjusted to 900W, the first welding line is melted, and the second welding line 6 with the total depth of 1.8 mm-2.3 mm is welded; the welding depth of the two welds here does not include the end values of the two ends.
j, the conveyor belt 2 moves the tool clamp 3 to a manual installation table of the vacuum actuator, and an operator manually installs the vacuum actuator 4.10 on the valve housing 4.1;
k, the conveyor belt 2 moves the tool clamp 3 to a valve casing leakage testing device, the valve casing leakage testing device ventilates the valve casing 4.1, and the sealing performance of the valve plate 4.8 and the cavity 4.9 of the valve casing 4.1 is tested;
l, the conveyor belt 2 moves the tool clamp 3 to an upper shell mounting device, an operator manually places the upper shell 4.11 on the valve shell 4.1, and the upper shell mounting device presses the locating pin into the upper shell mounting device and screws the locating pin into the upper shell mounting device to fix the locating pin.
m, conveyer belt 2 removes frock clamp 3 to whole testing arrangement that reveals, and whole testing arrangement that reveals carries out water route sealing performance's test and gas circuit sealing performance's test to the whole after the assembly, including carrying out the air feed to the air inlet 4.13 department of EGR valve in order to test the leakproofness of EGR valve gas circuit, carries out the air feed to the cooling water import 4.14 department of EGR valve in order to test the leakproofness of EGR valve water route.
The foregoing is illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary. All changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (10)
1. An EGR valve assembly line, its characterized in that: including setting up setting element pressure equipment device (1), valve block welding set, vacuum actuator manual mount table, valve casing reveal testing arrangement, epitheca installation device, whole test device, conveyer belt (2) of revealing, be equipped with frock clamp (3) on conveyer belt (2), frock clamp (3) centre gripping valve casing (4.1) are in order through the assembly of above-mentioned device in order with accomplishing the EGR valve, setting element pressure equipment device (1) include pressure equipment platform (1.1), establish the pressure equipment mechanism in pressure equipment platform (1.1), pressure equipment mechanism includes inside lining pressure equipment structure (1.2), gasket main lining pressure equipment structure (1.3), sealing washer pressure equipment structure (1.4), keeps piece pressure equipment structure (1.5), be equipped with mounting hole (4.1.1) in valve casing (4.1), pressure equipment mechanism is with inside lining (4.2), gasket (4.3) and main lining (4.4), sealing washer (4.5), keeps piece (4.1.1) in order to be pressed into mounting hole.
2. The EGR valve assembly line according to claim 1, characterized in that: the inner liner press-fitting structure (1.2) comprises a first push rod (1.2.1), a first boss (1.2.2) for placing an inner liner (4.2) is arranged at the head of the first push rod (1.2.1), and a first supporting sleeve (1.2.3) matched with an inner hole of the inner liner (4.2) is arranged at the periphery of the first boss (1.2.2).
3. The EGR valve assembly line according to claim 1, characterized in that: the gasket main bushing press-fitting structure (1.3) comprises a second push rod (1.3.1), a second boss (1.3.2) for placing a main bushing (4.4) and a gasket (4.3) is arranged at the head of the second push rod (1.3.1), an expansion sleeve (1.3.3) for keeping the axis of the main bushing (4.4) consistent with the axis of the second push rod (1.3.1) is arranged on the second boss (1.3.2), and a second supporting sleeve (1.3.4) matched with an inner hole of the gasket (4.3) is further arranged on the second boss (1.3.2).
4. The EGR valve assembly line according to claim 3, characterized in that: the main bushing (4.4) is internally provided with a conical hole, the expansion sleeve (1.3.3) comprises two annular bodies (1.3.3.1) sleeved on the second boss (1.3.2) and elastic sheets (1.3.3.2) arranged between the two annular bodies (1.3.3.1) and protruding outwards in the radial direction of the annular bodies (1.3.3.1), the elastic sheets (1.3.3.2) are arranged in a plurality of annular bodies (1.3.3.1) at intervals in the circumferential direction, and the elastic sheets (1.3.3.2) are propped against the inner wall of the conical hole.
5. The EGR valve assembly line according to claim 1, characterized in that: the sealing ring press-fitting structure (1.4) comprises a third push rod (1.4.1), a third boss (1.4.2) for placing a sealing ring (4.5) is arranged at the head of the third push rod (1.4.1), a retaining sleeve (1.4.3) is arranged outside the third boss (1.4.2), the retaining sleeve (1.4.3) is provided with a retaining hole (1.4.4) for propping against the outer wall of the sealing ring (4.5), the diameter of the retaining hole (1.4.4) is smaller than that of the assembly hole (4.1.1),
the retaining sleeve (1.4.3) is elastically abutted against the third push rod (1.4.1) through the first spring (1.4.5).
6. The EGR valve assembly line according to claim 5, characterized in that: the outer wall of the third push rod (1.4.1) is provided with a guide post (1.4.6) in a protruding mode, the retaining sleeve (1.4.3) is provided with a guide groove (1.4.7) which is used for being matched with the guide post (1.4.6) to prevent the retaining sleeve (1.4.3) and the third boss (1.4.2) from rotating relatively along the circumferential direction.
7. The EGR valve assembly line according to claim 1, characterized in that: the holding sheet press-fitting structure (1.5) comprises a fourth push rod (1.5.1), a fourth boss (1.5.2) for placing the holding sheet (4.6) is arranged at the head of the fourth push rod (1.5.1), and a fourth supporting sleeve (1.5.3) matched with the inner hole of the holding sheet (4.6) is further arranged outside the fourth boss (1.5.2).
8. The EGR valve assembly line according to claim 1, characterized in that: the lining sleeve press-fitting structure (1.2) comprises a first push rod (1.2.1), the gasket main lining sleeve press-fitting structure (1.3) comprises a second push rod (1.3.1), the sealing ring press-fitting structure (1.4) comprises a third push rod (1.4.1), the retaining piece press-fitting structure (1.5) comprises a fourth push rod (1.5.1), the first push rod (1.2.1) is driven by a first pneumatic guide rail (1.6) arranged on a press-fitting table (1.1), the second push rod (1.3.1) is driven by a second pneumatic guide rail (1.7) arranged on the press-fitting table (1.1), the third push rod (1.4.1) is driven by a third pneumatic guide rail (1.8) arranged on the press-fitting table (1.1), the fourth push rod (1.5.1) is driven by a fourth pneumatic guide rail (1.9) arranged on the press-fitting table (1.1) and a fourth pneumatic guide rail (1.9) arranged between the fourth pneumatic guide rail and the fourth pneumatic guide rail (1.1.1.1).
9. The EGR valve assembly line according to claim 1, characterized in that: the mounting table is provided with a servo structure (1.11) for sequentially moving the liner sleeve press-fitting structure (1.2), the gasket main liner press-fitting structure (1.3), the sealing ring press-fitting structure (1.4) and the retaining piece press-fitting structure (1.5) to the alignment assembly hole (4.1.1).
10. An assembly method of an EGR valve assembly production line is characterized in that: it comprises the following steps of the method,
a, mounting a valve housing (4.1) into a fixture (3), and moving the fixture (3) to a positioning piece press-mounting device (1) by a conveyor belt (2);
b, an operator places the inner bushing (4.2) on the first boss (1.2.2), places the main bushing (4.4) and the gasket (4.3) on the second boss (1.3.2), places the sealing ring (4.5) on the third boss (1.4.2), places the retaining piece (4.6) on the fourth boss (1.5.2), and then starts the positioning piece press-fitting device (1) to operate;
c, the first pneumatic guide rail (1.6) moves the first push rod (1.2.1) of the inner liner pressing structure (1.2) into the assembly hole (4.1.1) of the valve casing (4.1), and the inner liner (4.2) is installed in the assembly hole (4.1.1);
d, the second pneumatic guide rail (1.7) moves the second push rod (1.3.1) of the gasket main bushing press-fit structure (1.3) into the assembly hole (4.1.1) of the valve casing (4.1), and the gasket (4.3) and the main bushing (4.4) are assembled into the assembly hole (4.1.1);
e, the third pneumatic guide rail (1.8) moves the third push rod (1.4.1) of the sealing ring press-fitting structure (1.4) into the assembly hole (4.1.1) of the valve casing (4.1), and the sealing ring (4.5) is installed in the assembly hole (4.1.1);
f, the fourth pneumatic guide rail (1.9) moves the fourth push rod (1.5.1) of the holding piece press-fitting structure (1.5) into the assembly hole (4.1.1) of the valve casing (4.1), and the holding piece (4.6) is installed in the assembly hole (4.1.1);
g, continuously conveying the conveyor belt (2), and conveying the valve casing (4.1) with the positioning piece to a valve plate welding device;
h, inserting the valve rod (4.7) into the assembly hole (4.1.1), and loading the valve plate (4.8) into the cavity (4.9) of the valve casing (4.1) and propping against the valve rod (4.7);
i, valve block welding set welds valve block (4.8) and valve rod (4.7) in order to fix each other, includes: the first welding, the welding power is adjusted to 200W, and the welding depth is a first welding line of 0 mm-0.2 mm; the second welding, the welding power is adjusted to 900W, the first welding line is melted, and the second welding line with the total depth of 1.8 mm-2.3 mm is welded;
j, the conveying belt (2) moves the tool clamp (3) to a manual installation table of the vacuum actuator, and an operator manually installs the vacuum actuator (4.10) on the valve casing (4.1);
k, the conveying belt (2) moves the tool clamp (3) to a valve casing leakage testing device, the valve casing leakage testing device ventilates the valve casing (4.1), and the sealing performance of the valve plate (4.8) and the cavity (4.9) of the valve casing (4.1) is tested;
l, the conveying belt (2) moves the tool clamp (3) to an upper shell mounting device, an operator manually places an upper shell (4.11) on the valve shell (4.1), and the upper shell mounting device presses a locating pin into the upper shell mounting device and screws a screw (4.12) to fix the locating pin;
m, conveyer belt (2) remove frock clamp (3) to whole testing arrangement that reveals, whole testing arrangement that reveals carries out water route sealing performance's test and gas circuit sealing performance's test to the whole after the assembly, including carrying out the air feed in order to test the leakproofness of EGR valve gas circuit to air inlet (4.13) department of EGR valve, carry out the air feed in order to test the leakproofness of EGR valve water route to cooling water import (4.14) department of EGR valve.
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| CN201711476697.XA CN108145411B (en) | 2017-12-29 | 2017-12-29 | EGR valve assembly production line and assembly method thereof |
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| CN109702485B (en) * | 2019-01-10 | 2024-02-06 | 四川鑫元瑞科技有限公司 | Catalyst converter press fitting equipment |
| CN110017982A (en) * | 2019-04-03 | 2019-07-16 | 温州市温纳汽车配件有限公司 | EGR valve assembly detection production line and assembly and detection method |
| CN111168380A (en) * | 2020-01-17 | 2020-05-19 | 宁波力品格自动化科技有限公司 | Automatic assembly machine for controllable gas spring valve members |
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