CN102528264A - Bimetal vacuum diffusion welding method of hydraulic pump/motor cylinder body - Google Patents
Bimetal vacuum diffusion welding method of hydraulic pump/motor cylinder body Download PDFInfo
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- CN102528264A CN102528264A CN2011103996129A CN201110399612A CN102528264A CN 102528264 A CN102528264 A CN 102528264A CN 2011103996129 A CN2011103996129 A CN 2011103996129A CN 201110399612 A CN201110399612 A CN 201110399612A CN 102528264 A CN102528264 A CN 102528264A
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- copper alloy
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- hotpressing stove
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- plunger hole
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- 238000003466 welding Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000009792 diffusion process Methods 0.000 title claims abstract description 23
- 238000007731 hot pressing Methods 0.000 claims abstract description 93
- 229910000881 Cu alloy Inorganic materials 0.000 claims abstract description 69
- 238000009413 insulation Methods 0.000 claims abstract description 19
- 239000010425 asbestos Substances 0.000 claims abstract description 8
- 239000004744 fabric Substances 0.000 claims abstract description 8
- 229910052895 riebeckite Inorganic materials 0.000 claims abstract description 8
- 238000005245 sintering Methods 0.000 claims abstract description 7
- 239000011159 matrix material Substances 0.000 claims description 18
- 239000007770 graphite material Substances 0.000 claims description 8
- 238000004886 process control Methods 0.000 claims description 7
- 238000005086 pumping Methods 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052799 carbon Inorganic materials 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 abstract 2
- 229910000746 Structural steel Inorganic materials 0.000 abstract 1
- 238000003825 pressing Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 43
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 239000011229 interlayer Substances 0.000 description 5
- 238000000429 assembly Methods 0.000 description 4
- 230000000712 assembly Effects 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005204 segregation Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 210000004907 gland Anatomy 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 238000005088 metallography Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000010183 spectrum analysis Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
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Abstract
The invention relates to a bimetal vacuum diffusion welding method of a hydraulic pump/motor cylinder body. The bimetal vacuum diffusion welding method comprises the following implementation steps of: (1) manufacturing all parts and assembling: pressing a copper alloy sleeve into each plunger hole, inserting a plunger hole expansion core into a hole of each copper alloy sleeve, placing a spherical surface copper alloy plate on the hemispherical surface at the upper end of a basal body, placing plunger hole heat insulation layers between the plunger hole expansion cores and the copper alloy sleeves, and placing hemispherical surface heat insulation layers between hemispherical surface pressure heads and the spherical surface copper alloy plate; (2) charging into a furnace: respectively placing the hemispherical surface pressure head on the upper surface of each cylinder body component, and laying asbestos cloth between layers of each cylinder body component; (3) sintering: controlling the vacuum degree, the heating-up process and the pressurizing process in a vacuum hot-pressing furnace; and (4) firstly uniformly cooling down, and then naturally cooling to the normal temperature. According to the bimetal vacuum diffusion welding method disclosed by the invention, interatomic mutual diffusion bonding of a copper alloy and carbon structural steel of the basal body can be realized, the structure of the copper alloy is more compact, the anti-friction effect is further improved and the working life is significantly prolonged.
Description
Technical field
The present invention relates to plant equipment manufacturing technology field, relate to the method that the vacuum diffusion welding of a kind of hydraulic pump/motor cylinder body bimetallic connects.
Background technology
In order to improve the service life of hydraulic pump/motor cylinder body, the plunger hole of cylinder body and hemisphere face generally use copper alloy as friction pair material, and promptly inner surface and the hemispherical outer surface at the cylinder body plunger hole adheres to the layer of copper alloy as wearing layer.How this wearing layer combines with the matrix (carbon junction steel) of cylinder body, various ways are arranged at present, but general way has two kinds: the one, and the integrated poured copper alloy of plunger hole and hemisphere face; The 2nd, plunger hole adopts interference fit to press-fit copper alloy cover, hemisphere face cast copper alloy.All there is defective in these two kinds of processes, and are integrated poured owing to gravity segregation occurs easily, cause material chemical composition inhomogeneous, reduced the wearability of material; The casting flaw that occurs when in addition pouring into a mould usually makes and scraps when cylinder body is worked into finishing operation.The method of plunger hole gland because interference fit is a physical bond, cylinder body copper sheathing when work often occurs and deviates from phenomenon.
Summary of the invention
The purpose of this invention is to provide the method that the vacuum diffusion welding of a kind of hydraulic pump/motor cylinder body bimetallic connects, solved in the prior art that bimetallic combines to exist gravity segregation, matrix embrittlement, micro-flaw and plunger hole copper sheathing to deviate from etc. to cause that the hydraulic pump/motor cylinder body is not wear-resisting, undercapacity and service life short problem.
The technical scheme that the present invention adopted is, the method that the vacuum diffusion welding of a kind of hydraulic pump/motor cylinder body bimetallic connects is implemented according to following steps:
Assemble again; Promptly in each plunger hole of matrix, be pressed into the copper alloy cover of a correspondence; The taper of copper alloy cover is down uncovered, inserts the plunger hole core that rises in each copper alloy trepanning from bottom to top, the hemisphere face copper alloy plate is placed on the hemisphere face of matrix upper end; Simultaneously in assembling process; Rise at plunger hole and to place the plunger hole thermal insulation layer of graphite material between core and the copper alloy cover, the hemisphere face thermal insulation layer of placement graphite material between hemisphere face pressure head and hemisphere face copper alloy plate, the housing assembly that obtains assembling;
Step 3, sintering: the vacuum of controlling all the time in the vacuum hotpressing stove is 1 * 10
1-1 * 10
-2Pa, and carry out intensification, the pressure process control in the vacuum hotpressing stove according to following three phases:
3.1) making that in 90-120 minute temperature evenly rises to 600 ℃ from room temperature in the vacuum hotpressing stove, the downward pressure of push-down head reaches 5-8MPa in the vacuum hotpressing stove simultaneously, is incubated 10-15 minute;
3.2) in 60-80 minute, make in the vacuum hotpressing stove temperature evenly rise to 750 ℃ from 600 ℃, the downward pressure of push-down head reaches 8-15MPa in the vacuum hotpressing stove simultaneously, is incubated 10-15 minute then;
3.3) make that in 60-90 minute temperature evenly rises to 850-870 ℃ from 750 ℃ in the vacuum hotpressing stove; The downward pressure of push-down head reaches 15-20MPa in the vacuum hotpressing stove simultaneously; Be incubated 60-65 minute then; In the insulating process, the downward pressure of push-down head reaches 20-30Mpa in the vacuum hotpressing stove;
The invention has the beneficial effects as follows, adopt matrix (carbon junction steel) integral solder of the process of vacuum diffusion welding, avoided pouring technology the gravity segregation in east and the phenomenon of press-offing that gland technology occurs to occur plunger hole and hemispherical copper alloy and cylinder body; In addition; The technical process of vacuum diffusion welding is hot pressing welding under vacuum state, and cylinder body plunger hole and hemisphere face copper alloy are had the secondary heat treatment effect, can eliminate the casting stress and the microscopic defect of copper alloy; It is fine and close more, even to make copper alloy organize, and wearability is further enhanced.
Description of drawings
Fig. 1 is the mounting structure sketch map of the vacuum hotpressing stove that relies on of the inventive method;
Fig. 2 is the housing assembly assembly structure sketch map in the inventive method;
Fig. 3 is the energy spectrum analysis figure that adopts bimetallic combination place that the inventive method obtains;
Fig. 4 is that the cylinder body bimetallic of the inventive method preparation combines face metallography microscope photo;
Fig. 5 is that the cylinder body bimetallic of existing method preparation combines face metallography microscope photo.
Among the figure, 1. hydraulic cylinder; 2. furnace body support; 3. body of heater; 4. push-down head; 5. housing assembly; 6. vacuum pumping opening; 7. electrode interface; 8. lower support seat; 9. support plate, 21. hemisphere face pressure heads; 22. hemisphere face thermal insulation layer; 23. sphere copper alloy plate; 24. plunger hole copper alloy cover, 25. plunger hole thermal insulation layers; The core 26. plunger hole rises; 27. matrix.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is elaborated.
As shown in Figure 1; The method that hydraulic pump/motor cylinder body bimetallic of the present invention vacuum diffusion welding connects relies on a kind of vacuum hotpressing stove Welding Structure, and its structure is; The body of heater 3 of vacuum hotpressing stove is installed through support plate 9 in furnace body support 2; The upper end of furnace body support 2 is provided with hydraulic cylinder 1, on the body of heater 3 of vacuum hotpressing stove, has vacuum pumping hole 6, and vacuum pumping hole 6 is connected with vacuum unit outside the furnace body support 2; The electrode interface 7 of the heater in the body of heater 3 is connected with the electric-control system of vacuum hotpressing stove; Body of heater 3 set inside have lower support seat 8 and push-down head 4; Push-down head 4 is arranged on the top of lower support seat 8; Lower support seat 8 passes body of heater 3 downwards and is fixedly mounted on the base plate of furnace body support 2; Push-down head 4 upwards passes body of heater 3 backs through connecting rod and is connected with hydraulic cylinder 1, is used to place the housing assembly 5 as processing object between lower support seat 8 and the push-down head 4.
The body of heater 3 of vacuum hotpressing stove is connected with the vacuum unit through vacuum pumping hole 6, is used to realize the vacuum state (1 * 10 of vacuum hotpressing stove
1-1 * 10
-2Pa); Push-down head 4 is connected with the hydraulic cylinder 1 that the vacuum hotpressing stove top is provided with through connecting rod; Push-down head 4 applies vertical load through the mode to the top to workpiece with lower support seat 8; Realize exerting pressure in the cylinder body vacuum welding process; Pressure limit is 5MPa-30Mpa, and electrode interface 7 is connected with external electric-control system, the unified Collaborative Control that realizes vacuum hotpressing stove internal temperature, pressure, displacement and vacuum.
The method that hydraulic pump/motor cylinder body bimetallic of the present invention vacuum diffusion welding connects, specifically implement according to following steps:
Assemble according to structure shown in Figure 2 again; Promptly in each plunger hole of matrix 27, be pressed into the copper alloy cover 24 of a correspondence; The taper of copper alloy cover 24 is down uncovered; Each copper alloy overlaps and inserts the plunger hole core 26 that rises in 24 holes from bottom to top, hemisphere face copper alloy plate 23 is placed on the hemisphere face of matrix 27 upper ends, simultaneously in assembling process; In order to prevent that cylinder body and hot-working frock from producing unnecessary welding adhesion; Must rise at plunger hole and place the plunger hole thermal insulation layer 25 of graphite material between core 26 and the copper alloy cover 24, between hemisphere face pressure head 21 and hemisphere face copper alloy plate 23, place the hemisphere face thermal insulation layer 22 of graphite material, the housing assembly 5 that obtains assembling.
Step 3, sintering: utilize the control system that corresponding vacuum welding parameter is set, the vacuum of controlling all the time in the vacuum hotpressing stove is 1 * 10
1-1 * 10
-2Pa, and carry out intensification, the pressure process control in the vacuum hotpressing stove according to following three phases:
3.1) making that in 90-120 minute temperature evenly rises to 600 ℃ from room temperature in the vacuum hotpressing stove, the downward pressure of push-down head 4 reaches 5-8MPa in the vacuum hotpressing stove simultaneously, is incubated 10-15 minute;
3.2) in 60-80 minute, make in the vacuum hotpressing stove temperature evenly rise to 750 ℃ from 600 ℃, the downward pressure of push-down head 4 reaches 8-15MPa in the vacuum hotpressing stove simultaneously, is incubated 10-15 minute then;
3.3) make that in 60-90 minute temperature evenly rises to 850-870 ℃ from 750 ℃ in the vacuum hotpressing stove; The downward pressure of push-down head 4 reaches 15-20MPa in the vacuum hotpressing stove simultaneously; Be incubated 60-65 minute then; In the insulating process, the downward pressure of push-down head 4 reaches 20-30Mpa in the vacuum hotpressing stove;
Assemble according to structure shown in Figure 2 again; Promptly in each plunger hole of matrix 27, be pressed into the copper alloy cover 24 of a correspondence; The taper of copper alloy cover 24 is down uncovered; Each copper alloy overlaps and inserts the plunger hole core 26 that rises in 24 holes from bottom to top, hemisphere face copper alloy plate 23 is placed on the hemisphere face of matrix 27 upper ends, simultaneously in assembling process; In order to prevent that cylinder body and hot-working frock from producing unnecessary welding adhesion; Must rise at plunger hole and place the plunger hole thermal insulation layer 25 of graphite material between core 26 and the copper alloy cover 24, between hemisphere face pressure head 21 and hemisphere face copper alloy plate 23, place the hemisphere face thermal insulation layer 22 of graphite material, the housing assembly 5 that obtains assembling.
Step 3, sintering: utilize the control system that corresponding vacuum welding parameter is set, the vacuum of controlling all the time in the vacuum hotpressing stove is 1 * 10
1Pa, and carry out intensification, the pressure process control in the vacuum hotpressing stove according to following three phases:
3.1) making that in 90 minutes temperature evenly rises to 600 ℃ from room temperature in the vacuum hotpressing stove, the downward pressure of push-down head 4 reaches 5MPa in the vacuum hotpressing stove simultaneously, is incubated 10 minutes;
3.2) in 60 minutes, make in the vacuum hotpressing stove temperature evenly rise to 750 ℃ from 600 ℃, the downward pressure of push-down head 4 reaches 8MPa in the vacuum hotpressing stove simultaneously, is incubated 10 minutes then;
3.3) make that in 60 minutes temperature evenly rises to 850 ℃ from 750 ℃ in the vacuum hotpressing stove; The downward pressure of push-down head 4 reaches 15MPa in the vacuum hotpressing stove simultaneously; Be incubated 60 minutes then, in the insulating process, the downward pressure of push-down head 4 reaches 20Mpa in the vacuum hotpressing stove;
Step 3, the vacuum of controlling in the vacuum hotpressing stove all the time are 1 * 10
-2Pa, and carry out intensification, the pressure process control in the vacuum hotpressing stove according to following three phases:
3.1) making that in 120 minutes temperature evenly rises to 600 ℃ from room temperature in the vacuum hotpressing stove, the downward pressure of push-down head 4 reaches 8MPa in the vacuum hotpressing stove simultaneously, is incubated 15 minutes;
3.2) in 80 minutes, make in the vacuum hotpressing stove temperature evenly rise to 750 ℃ from 600 ℃, the downward pressure of push-down head 4 reaches 15MPa in the vacuum hotpressing stove simultaneously, is incubated 15 minutes then;
3.3) make that in 90 minutes temperature evenly rises to 870 ℃ from 750 ℃ in the vacuum hotpressing stove; The downward pressure of push-down head 4 reaches 20MPa in the vacuum hotpressing stove simultaneously; Be incubated 65 minutes then, in the insulating process, the downward pressure of push-down head 4 reaches 30Mpa in the vacuum hotpressing stove;
Embodiment 3
Step 3, sintering: utilize the control system that corresponding vacuum welding parameter is set, the vacuum of controlling all the time in the vacuum hotpressing stove is 1 * 10
-1Pa, and carry out intensification, the pressure process control in the vacuum hotpressing stove according to following three phases:
3.1) making that in 100 minutes temperature evenly rises to 600 ℃ from room temperature in the vacuum hotpressing stove, the downward pressure of push-down head 4 reaches 6MPa in the vacuum hotpressing stove simultaneously, is incubated 12 minutes;
3.2) in 70 minutes, make in the vacuum hotpressing stove temperature evenly rise to 750 ℃ from 600 ℃, the downward pressure of push-down head 4 reaches 12MPa in the vacuum hotpressing stove simultaneously, is incubated 12 minutes then;
3.3) make that in 80 minutes temperature evenly rises to 860 ℃ from 750 ℃ in the vacuum hotpressing stove; The downward pressure of push-down head 4 reaches 18MPa in the vacuum hotpressing stove simultaneously; Be incubated 60 minutes then, in the insulating process, the downward pressure of push-down head 4 reaches 25Mpa in the vacuum hotpressing stove;
Step 3, sintering: the vacuum of controlling all the time in the vacuum hotpressing stove is 1.5 * 10
-2Pa, and carry out intensification, the pressure process control in the vacuum hotpressing stove according to following three phases:
3.1) making that in 110 minutes temperature evenly rises to 600 ℃ from room temperature in the vacuum hotpressing stove, the downward pressure of push-down head 4 reaches 7MPa in the vacuum hotpressing stove simultaneously, is incubated 10 minutes;
3.2) in 70 minutes, make in the vacuum hotpressing stove temperature evenly rise to 750 ℃ from 600 ℃, the downward pressure of push-down head 4 reaches 10MPa in the vacuum hotpressing stove simultaneously, is incubated 15 minutes then;
3.3) make that in 70 minutes temperature evenly rises to 860 ℃ from 750 ℃ in the vacuum hotpressing stove; The downward pressure of push-down head 4 reaches 16MPa in the vacuum hotpressing stove simultaneously; Be incubated 60 minutes then, in the insulating process, the downward pressure of push-down head 4 reaches 30Mpa in the vacuum hotpressing stove;
Combine the energy spectrum analysis figure from the bimetallic of Fig. 3, can be quantitative find out in the cylinder body that the inventive method prepares that each essential element of copper alloy is diffused into that the degree of depth and iron atom are diffused into the degree of depth in the copper alloy in the steel.In Fig. 3, Fe curve and Cu curved intersection place are the bimetallic interface, and abscissa is represented diffusion depth among the figure, and ordinate is represented the concentration of each atom diffusion.Find out that from Fig. 3 the degree of depth that Cu, Sn, Ni are diffused in the steel is about 22 μ m, the degree of depth that Fe is diffused in the copper alloy is about 20 μ m.In between the diffusion region of steel, because the infiltration of each element of copper alloy, carbon junction steel transforms for steel alloy, so bimetallic combines the intensity of the intensity of face greater than cylinder body matrix material carbon junction steel.
Combine the face gold as finding out the photo from the bimetallic of Fig. 4, on the faying face of copper alloy and carbon junction steel, two kinds of metals fully metallurgy changed; Comparison diagram 5 existing copper alloy gold are as finding out in the photo, through the copper alloy of vacuum diffusion welding, Pb more even distribution.
Utilize prepared hydraulic pump of method of the present invention or hydraulic motor cylinders; Owing in cylinder body hemisphere face and plunger hole, be respectively charged into hemisphere face copper alloy plate and copper alloy cover; Under vacuum state, carry out the HTHP Diffusion Welding, make the matrix (carbon junction steel) of cylinder body and copper alloy wearing layer reach metallurgical binding.So, the bimetallic cylinder body that utilizes vacuum diffusion welding to make, because bimetallic combines intensity high, wearing layer dense structure, chemical composition are evenly distributed, and make the wearability of cylinder body be greatly improved.Use with actual through various tests, prove that the bimetallic cylinder body that vacuum diffusion welding connects can satisfy hydraulic pump/motor fully in high pressure, high-revolving condition of work, has boundless application value.
Claims (3)
1. the method that connects of hydraulic pump/motor cylinder body bimetallic vacuum diffusion welding is characterized in that, implements according to following steps:
Step 1, elder generation make each parts respectively according to the drawing specification; Comprise the workpiece cylinder body matrix (27), the copper alloy cover (24) and the hemisphere face copper alloy plate (23) that will weld, and the plunger hole that is used in the welding process rise core (26) and hemisphere face pressure head (21);
Assemble again; Promptly in each plunger hole of matrix (27), be pressed into the copper alloy cover (24) of a correspondence; The taper of copper alloy cover (24) is down uncovered, inserts the plunger hole core (26) that rises in each copper alloy cover (24) hole from bottom to top, hemisphere face copper alloy plate (23) is placed on the hemisphere face of matrix (27) upper end; Simultaneously in assembling process; Rise between core (26) and the copper alloy cover (24) at plunger hole and to place the plunger hole thermal insulation layer (25) of graphite material, the hemisphere face thermal insulation layer (22) of placement graphite material between hemisphere face pressure head (21) and hemisphere face copper alloy plate (23), the housing assembly that obtains assembling (5);
Step 2, shove charge: the housing assembly (5) that step 1 assembles is put into the welded body of heater of vacuum hotpressing stove (3); With the plunger hole of each housing assembly (5) down, hemisphere face is placed on the lower support seat (8) in the vacuum hotpressing stove up; The upper surface of each housing assembly (5) is placed a hemisphere face pressure head (21); Area size according to different specification size and lower support seat (8); Put 3-7 housing assembly (5) for every layer, put the 3-4 layer altogether, the thick asbestos cloth of place mat 2-2.5mm between layer and the layer;
Step 3, sintering: the vacuum of controlling all the time in the vacuum hotpressing stove is 1 * 10
1-1 * 10
-2Pa, and carry out intensification, the pressure process control in the vacuum hotpressing stove according to following three phases:
3.1) making that in 90-120 minute temperature evenly rises to 600 ℃ from room temperature in the vacuum hotpressing stove, the downward pressure of push-down head (4) reaches 5-8MPa in the vacuum hotpressing stove simultaneously, is incubated 10-15 minute;
3.2) in 60-80 minute, make in the vacuum hotpressing stove temperature evenly rise to 750 ℃ from 600 ℃, the downward pressure of push-down head (4) reaches 8-15MPa in the vacuum hotpressing stove simultaneously, is incubated 10-15 minute then;
3.3) make that in 60-90 minute temperature evenly rises to 850-870 ℃ from 750 ℃ in the vacuum hotpressing stove; The downward pressure of push-down head (4) reaches 15-20MPa in the vacuum hotpressing stove simultaneously; Be incubated 60-65 minute then; In the insulating process, the downward pressure of push-down head (4) reaches 20-30Mpa in the vacuum hotpressing stove;
Step 4, first uniform decrease in temperature to 150 ℃-180 ℃, the housing assembly (5) that welding is good takes out vacuum hotpressing stove; Naturally cool to normal temperature again, remove rise core (26) and plunger hole thermal insulation layer of plunger hole and (25).
2. vacuum diffusion welding according to claim 1 connects hydraulic pump or the bimetallic method of hydraulic motor cylinders; It is characterized in that; In the described step 1; It is that cylindrical inner diameter is conical structure that copper alloy cover (24) is processed into external diameter, and plunger hole rises by the interior hole shape of core (26) cylindrical shape and copper alloy cover (24) according to the matched in clearance controlling dimension, and the spheric curvature of hemisphere face pressure head (21) is consistent with hemisphere face copper alloy plate (23).
3. vacuum diffusion welding according to claim 1 connects hydraulic pump or the bimetallic method of hydraulic motor cylinders; It is characterized in that described step 2 relies on a kind of vacuum hotpressing stove Welding Structure, its structure is; In furnace body support (2), the vacuum hotpressing furnace body is installed through support plate (9); The upper end of furnace body support (2) is provided with hydraulic cylinder (1), on the body of heater (3) of vacuum hotpressing stove, has vacuum pumping hole (6), and vacuum pumping hole (6) is connected with vacuum unit outside the furnace body support (2); The electrode interface (7) of the heater in the body of heater (3) is connected with the electric-control system of vacuum hotpressing stove; Body of heater (3) set inside has lower support seat (8) and push-down head (4); Push-down head (4) is arranged on the top of lower support seat (8); Lower support seat (8) passes body of heater (3) downwards and is fixedly mounted on the base plate of furnace body support (2), and push-down head (4) upwards passes body of heater (3) back through connecting rod and is connected with hydraulic cylinder (1).
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|---|---|---|---|
| CN 201110399612 CN102528264B (en) | 2011-12-05 | 2011-12-05 | Bimetal vacuum diffusion welding method of hydraulic pump/motor cylinder body |
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|---|---|---|---|
| CN 201110399612 CN102528264B (en) | 2011-12-05 | 2011-12-05 | Bimetal vacuum diffusion welding method of hydraulic pump/motor cylinder body |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103527468A (en) * | 2013-09-16 | 2014-01-22 | 中航力源液压股份有限公司 | Duplex metal cylinder body applicable to hydraulic pump or motor |
| CN104057201A (en) * | 2014-06-27 | 2014-09-24 | 中航力源液压股份有限公司 | Plunger piston hydraulic pump motor rotor dual alloy structure diffusion welding method |
| CN104070284A (en) * | 2014-07-10 | 2014-10-01 | 中航力源液压股份有限公司 | Diffusion welding method for pipe and pipe welding structure |
| CN105665912A (en) * | 2016-04-07 | 2016-06-15 | 中国南方航空工业(集团)有限公司 | Diffusion welding method for sealing structure of engine |
| CN106238897A (en) * | 2016-07-29 | 2016-12-21 | 西安东瑞机械制造有限公司 | A kind of hydraulic pump bimetallic cylinder high-frequency vacuum diffusion welding (DW) intelligent manufacturing system |
| CN107225318A (en) * | 2017-06-08 | 2017-10-03 | 中国科学院电子学研究所 | The diffusion welding method of metal telescoping pieces |
| CN108746977A (en) * | 2018-05-02 | 2018-11-06 | 中国航发北京航空材料研究院 | A kind of installation method of plunger pump cylinder body and copper sheathing |
| CN112570689A (en) * | 2020-11-18 | 2021-03-30 | 贵州鼎成熔鑫科技有限公司 | Copper reduction method for plunger hole of bimetallic cylinder body of hydraulic plunger pump and motor |
| CN112719667A (en) * | 2020-12-24 | 2021-04-30 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Plunger pump motor rotor bimetal structure process method |
| CN114012233A (en) * | 2021-11-24 | 2022-02-08 | 山东常林机械集团股份有限公司 | Diffusion welding method for plunger hole copper bush of hydraulic pump/motor cylinder |
| CN114473169A (en) * | 2022-02-28 | 2022-05-13 | 西安东瑞增材科技股份有限公司 | Diffusion welding method for wind tunnel electrode with bimetal cylindrical surface structure |
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| CN103527468A (en) * | 2013-09-16 | 2014-01-22 | 中航力源液压股份有限公司 | Duplex metal cylinder body applicable to hydraulic pump or motor |
| CN104057201A (en) * | 2014-06-27 | 2014-09-24 | 中航力源液压股份有限公司 | Plunger piston hydraulic pump motor rotor dual alloy structure diffusion welding method |
| CN104070284A (en) * | 2014-07-10 | 2014-10-01 | 中航力源液压股份有限公司 | Diffusion welding method for pipe and pipe welding structure |
| CN105665912B (en) * | 2016-04-07 | 2018-04-03 | 中国南方航空工业(集团)有限公司 | The diffusion welding method of engine seal structure |
| CN105665912A (en) * | 2016-04-07 | 2016-06-15 | 中国南方航空工业(集团)有限公司 | Diffusion welding method for sealing structure of engine |
| CN106238897A (en) * | 2016-07-29 | 2016-12-21 | 西安东瑞机械制造有限公司 | A kind of hydraulic pump bimetallic cylinder high-frequency vacuum diffusion welding (DW) intelligent manufacturing system |
| CN106238897B (en) * | 2016-07-29 | 2018-05-22 | 西安东瑞机械制造有限公司 | A kind of hydraulic pump bimetallic cylinder high-frequency vacuum diffusion welding (DW) intelligent manufacturing system |
| CN107225318A (en) * | 2017-06-08 | 2017-10-03 | 中国科学院电子学研究所 | The diffusion welding method of metal telescoping pieces |
| CN108746977A (en) * | 2018-05-02 | 2018-11-06 | 中国航发北京航空材料研究院 | A kind of installation method of plunger pump cylinder body and copper sheathing |
| CN112570689A (en) * | 2020-11-18 | 2021-03-30 | 贵州鼎成熔鑫科技有限公司 | Copper reduction method for plunger hole of bimetallic cylinder body of hydraulic plunger pump and motor |
| CN112719667A (en) * | 2020-12-24 | 2021-04-30 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Plunger pump motor rotor bimetal structure process method |
| CN114012233A (en) * | 2021-11-24 | 2022-02-08 | 山东常林机械集团股份有限公司 | Diffusion welding method for plunger hole copper bush of hydraulic pump/motor cylinder |
| CN114473169A (en) * | 2022-02-28 | 2022-05-13 | 西安东瑞增材科技股份有限公司 | Diffusion welding method for wind tunnel electrode with bimetal cylindrical surface structure |
| CN114473169B (en) * | 2022-02-28 | 2024-05-07 | 西安东瑞增材科技股份有限公司 | Diffusion welding method for bimetal cylindrical surface-shaped structure wind tunnel electrode |
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