CN114535434B - Novel embedded splicing sleeve extrusion bulging hydraulic system - Google Patents
Novel embedded splicing sleeve extrusion bulging hydraulic system Download PDFInfo
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- CN114535434B CN114535434B CN202210223354.7A CN202210223354A CN114535434B CN 114535434 B CN114535434 B CN 114535434B CN 202210223354 A CN202210223354 A CN 202210223354A CN 114535434 B CN114535434 B CN 114535434B
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- 238000001125 extrusion Methods 0.000 title claims abstract description 86
- 239000003921 oil Substances 0.000 claims abstract description 123
- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 239000010705 motor oil Substances 0.000 claims abstract description 12
- 230000009471 action Effects 0.000 claims abstract description 9
- 238000002788 crimping Methods 0.000 claims description 43
- 239000002199 base oil Substances 0.000 claims description 20
- 230000002457 bidirectional effect Effects 0.000 claims description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 60
- 229910052782 aluminium Inorganic materials 0.000 abstract description 60
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 40
- 239000010959 steel Substances 0.000 description 40
- 230000006835 compression Effects 0.000 description 13
- 238000007906 compression Methods 0.000 description 13
- 230000001276 controlling effect Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 8
- 238000007789 sealing Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 6
- 229910000838 Al alloy Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000000007 visual effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 102220584151 Androgen receptor_H64X_mutation Human genes 0.000 description 1
- 244000304337 Cuminum cyminum Species 0.000 description 1
- 241000721047 Danaus plexippus Species 0.000 description 1
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
- B30B1/32—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by plungers under fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
- B30B15/166—Electrical control arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
- B30B15/18—Control arrangements for fluid-driven presses controlling the reciprocating motion of the ram
- B30B15/183—Controlling the filling of the press cylinder during the approach stroke of the ram, e.g. prefill-valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/26—Programme control arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/024—Installations or systems with accumulators used as a supplementary power source, e.g. to store energy in idle periods to balance pump load
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
- F15B21/087—Control strategy, e.g. with block diagram
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B3/00—Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Press Drives And Press Lines (AREA)
Abstract
The invention discloses a novel embedded splicing sleeve extrusion bulging hydraulic system, which comprises: a high pressure oil control system comprising: the motor and the supercharger are arranged on the motor oil tank; the mold mounting mechanism is connected with the supercharger at one end; the axial extrusion system is connected with the other end of the die mounting mechanism; the first motor is used for providing power for the first hydraulic pump, the motor oil tank is connected with the input end of the first hydraulic pump, and the first hydraulic pump is used as a low-pressure oil source of the high-pressure oil control system. Further, the first hydraulic pump is respectively connected with a two-position two-way electromagnetic directional valve and a first one-way valve through a hydraulic pipeline, and the two-position two-way electromagnetic directional valve is connected with a first pilot overflow valve through a hydraulic pipeline. The invention uses one-step molding technology of combined action of axial extrusion and high-pressure internal expansion, and the steel-cored aluminum strand embedded tube type splicing sleeve structure is molded in one step through plastic deformation of materials at normal temperature.
Description
Technical Field
The invention relates to the technical field of splicing sleeve extrusion bulging equipment, in particular to a novel embedded splicing sleeve extrusion bulging hydraulic system.
Background
The existing steel-cored aluminum strand full-tension splicing sleeve mainly comprises a steel crimping pipe and an aluminum crimping pipe, wherein during crimping, the aluminum strand is firstly stripped to expose the steel strand, the steel strand is crimped by the steel crimping pipe, and then the aluminum alloy splicing sleeve, the aluminum strand and the steel strand are crimped together by the aluminum alloy crimping pipe. This conventional crimping method is prone to two problems:
(1) The damage to the steel core caused by the crimping of the steel core splicing sleeve;
in the traditional splicing process of the overhead conductor of the power transmission and transformation project, galvanized steel strand (or aluminum-clad steel strand) joints of steel core aluminum strands and ground wires are directly sleeved with steel pipes to be hydraulically connected, if the steel pipes are not matched with the steel strands in hardness, the size of a crimping die is unreasonable, the crimping pressure is insufficient, the defects of under-voltage, loose strands, over-voltage, surface damage of steel wires and the like are easy to occur, and the holding force of the joints does not meet the standard requirements. Among the steel strand crimping defect factors causing the steel-cored aluminum strand and the ground wire, the unmatched hardness of the steel tube and the steel strand is the most unavoidable, and in the production process of the aluminum-clad steel strand, the cold-drawn steel wire passes through the aluminum liquid plating, so that the cold-drawn steel wire is correspondingly tempered once, the hardness of the cold-drawn steel wire is reduced, the hardness of the steel strand is lower than that of the steel tube, and the steel wire of the steel strand is bitten by the inner wall of the steel tube during crimping, so that the grip of the joint is reduced.
(2) The crimping quality of the aluminum splicing sleeve is difficult to ensure;
in the traditional splicing process of the overhead conductor of the power transmission and transformation project, because the yield strength of the steel core is far greater than that of aluminum, plastic deformation hardening is generated at the crimping position of the aluminum stranded wire and the aluminum alloy splicing sleeve, and the section of the single aluminum stranded wire is thinned.
In summer, when the temperature is increased, the steel core expands outwards to extrude the aluminum stranded wires, the aluminum stranded wires and the aluminum alloy splicing sleeve expand inwards and outwards to continuously extrude the steel core, and as the yield strength of the steel core is far greater than that of aluminum, the plastic deformation hardening is continuously generated at the crimping part of the aluminum stranded wires, and the cross section of the single aluminum stranded wire is continuously thinned.
In winter, when the temperature is reduced, the section of the steel core is thinned due to the fact that the section of the steel core is in an elastic range, the pressure applied to the aluminum stranded wires by the steel core is reduced, the section of the aluminum stranded wires is also shrunk, but the section of the aluminum stranded wires is not expanded due to the fact that the aluminum stranded wires are subjected to yield hardening, and gaps are generated among the aluminum stranded wires. Rainwater, atmosphere, dirt and corrosive medium permeate into gaps of the aluminum stranded wires of the crimping joint, so that the surfaces of the aluminum stranded wires are oxidized, aluminum oxide is generated, contact resistance of crimping parts of the steel-cored aluminum stranded wires connecting tube is increased, heat is generated, and finally the steel-cored aluminum stranded wires fail.
In order to solve the problems of damage to the steel core, unstable crimping quality of the aluminum splicing sleeve and the like caused by the traditional crimping method, a novel embedded type splicing sleeve extrusion bulging hydraulic process is necessary to design, so that the steel-cored aluminum stranded wire is molded at one time, high-precision cutting-free machining is realized, the crimping quality is higher, the labor intensity is reduced, and the engineering cost is reduced.
Disclosure of Invention
The invention provides a novel embedded splicing sleeve extrusion bulging hydraulic system which solves the problems and adopts a one-step forming technology of axial extrusion-high-pressure internal bulging combined action to enable a steel-cored aluminum strand embedded pipe type splicing sleeve structure to be formed at one step through plastic deformation of materials at normal temperature.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention relates to a novel embedded splicing sleeve extrusion bulging hydraulic system, which comprises:
a high pressure oil control system for providing a power source, comprising: the motor and the supercharger are arranged on the motor oil tank;
the mold mounting mechanism is connected with the supercharger at one end;
an axial extrusion system connected to the other of the die mounting mechanisms;
the first motor is used for providing power for the first hydraulic pump, the motor oil tank is connected with the input end of the first hydraulic pump, and the first hydraulic pump is used as a low-pressure oil source of the high-pressure oil control system.
Further, the first hydraulic pump is connected with a two-position two-way electromagnetic directional valve and a first one-way valve through a hydraulic pipeline respectively, the two-position two-way electromagnetic directional valve is connected with a first pilot overflow valve through a hydraulic pipeline, the first pilot overflow valve is used for setting working pressure of the first hydraulic pump, and the two-position two-way electromagnetic directional valve is used for controlling boosting and unloading of the first hydraulic pump.
Further, the output end of the first hydraulic pump is connected with a first one-way valve through a hydraulic pipeline, and the first one-way valve is connected with a two-position four-way electromagnetic reversing valve through a hydraulic pipeline.
Further, the supercharger forms a bidirectional supercharging loop with a third one-way valve, a fourth one-way valve, a fifth one-way valve and a two-position four-way electromagnetic reversing valve of the second one-way valve through a hydraulic pipeline, one end of the bidirectional supercharging loop is connected with the first one-way valve, the other end of the bidirectional supercharging loop is connected with an oil inlet of the first pressure relay, and the first pressure relay is connected with the two-position two-way electromagnetic reversing valve.
Further, the die mounting mechanism includes:
the two frames are symmetrically arranged, the two frames are arranged on the machine base, and the motor oil tank is arranged on one side of the machine base;
the compression joint die is characterized in that a die supporting frame is arranged in the compression joint die, the die supporting frame is arranged between the two frames, the die supporting frame is arranged on the machine base, a sealing connecting disc is arranged in the die supporting frame, a workpiece is positioned between the die supporting frame and the sealing connecting disc, the outer surface of the sealing connecting disc is connected with the workpiece, the sealing connecting disc is used for sealing a gap workpiece between the workpiece and the die supporting frame, and a piston rod is arranged at the extrusion end of the die supporting frame.
Further, the crimping die comprises an inner die, an outer die and an additional die, wherein the additional die is arranged in the inner die and the outer die.
Further, the axial compression system includes:
the second hydraulic pump is connected with a hydraulic pump oil tank, the hydraulic pump oil tank is connected with an extrusion cylinder through an oil delivery pipe, the second hydraulic pump is positioned on the oil delivery pipe, and the extrusion cylinder is connected with a piston rod; the piston rod can contact the workpiece through the action of the extrusion cylinder, and the crimping die is used for axially extruding the workpiece and fixing the workpiece.
The reversing valve is arranged on the engine base oil tank, the reversing valve is connected with the extrusion cylinder through an oil return pipe, the reversing valve is connected with the engine base oil tank through an oil return pipe, the engine base oil tank is used for recovering oil of the oil return pipe, and the engine base oil tank is arranged on the other side of the engine base.
Further, the second hydraulic pump is connected with a two-position two-way electromagnetic directional valve through a hydraulic pipeline, the two-position two-way electromagnetic directional valve is connected with a second pilot overflow valve through a hydraulic pipeline, the second pilot overflow valve is used for setting working pressure of the second hydraulic pump, and the two-position two-way electromagnetic directional valve is used for controlling boosting and unloading of the second hydraulic pump.
Further, the output end of the second hydraulic pump is connected with a sixth one-way valve through a hydraulic pipeline, and the sixth one-way valve is respectively connected with a three-position four-way electromagnetic reversing valve, an energy accumulator and a second pressure relay through a hydraulic pipeline.
Further, the extrusion cylinder is connected with the first throttle valve and the second throttle valve which are connected in series, the two-time working switching of the extrusion cylinder is controlled by the two-position two-way electromagnetic directional valve and the two-position two-way electromagnetic directional valve, and the three-position four-way electromagnetic directional valve is respectively connected with the second hydraulic pump, the engine base oil tank, the extrusion cylinder, the first throttle valve and the two-position two-way electromagnetic directional valve through hydraulic pipelines.
In the technical scheme, the novel embedded splicing sleeve extrusion bulging hydraulic system provided by the invention has the following beneficial effects:
1. the one-step forming technology of the combined action of axial extrusion and high-pressure internal expansion is applied to form the steel-cored aluminum strand embedded pipe type splicing sleeve structure in one step, so that high-precision non-cutting machining is realized.
2. The steel-cored aluminum strand embedded tube type splicing sleeve extrusion bulging machine adopts hydraulic transmission and PLC control, realizes automatic control of production process flow, and improves the automation degree, efficiency and product qualification rate of equipment.
3. The high-pressure oil system adopts a bidirectional pressurizing loop; the extrusion system adopts two throttle valves to connect in series a secondary work feeding loop, and the energy accumulator maintains pressure, so that the crimping quality is higher, the labor intensity is reduced, and the engineering cost is reduced.
4. The hydraulic pump is simple in design and easy to maintain, is matched with a double-acting hydraulic pump to operate, adopts a double-loop structural design, and can work by being provided with a double-oil-way electric pump or a motor pump.
5. The double acting hydraulic cylinder can avoid the problem of spring elastic fatigue and slow reset, and can shorten the piston reset time.
6. The embedded pipe type crimp surface of the steel-cored aluminum stranded wire is wide, the crimp frequency is low, and the crimp deformation and the elongation rate can be reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
Fig. 1 is a schematic structural diagram of a novel extrusion bulging hydraulic system with an embedded splicing sleeve according to an embodiment of the present invention;
FIG. 2 is a schematic illustration of the high pressure oil control system of FIG. 1;
FIG. 3 is a schematic view of the axial compression system of FIG. 1;
FIG. 4 is a process flow diagram of a novel embedded splicing sleeve extrusion bulging hydraulic system provided by an embodiment of the invention;
FIG. 5 is a simplified schematic diagram of a crimping model of a steel-cored aluminum strand embedded aluminum splicing sleeve of a novel embedded splicing sleeve extrusion bulging hydraulic system provided by an embodiment of the invention;
fig. 6 is a wiring diagram of a PLC electronic control system of a novel embedded splicing sleeve extrusion bulging hydraulic system according to an embodiment of the present invention.
Reference numerals illustrate:
1. a high pressure oil control system; 2. a die mounting mechanism; 3. an axial extrusion system;
101. a motor; 102. a first hydraulic pump; 103. a supercharger; 104. a hydraulic pump oil tank; 105. a motor oil tank; 106. a first pilot-operated relief valve; 107. the second two-position two-way electromagnetic reversing valve; 108. a first two-position two-way electromagnetic directional valve; 109. two-position four-way electromagnetic reversing valve; 110. a first one-way valve; 111. a second one-way valve; 112. a third one-way valve; 113. a fourth one-way valve; 114. a fifth check valve; 115. a first pressure relay;
201. a frame; 202. a base; 203. sealing the receiving disc; 204. a mold support; 205. crimping a die; 206. a workpiece; 207. a piston rod;
301. an engine base oil tank; 303. a reversing valve; 304. an oil delivery pipe; 305. an oil return pipe; 306. an accumulator; 307. three-position four-way electromagnetic reversing valve; 308. a first throttle valve; 309. a second throttle valve; 310. an inner and outer mold; 311. an additional die; 312. an extrusion cylinder; 314. a second pressure relay; 315. a third two-position two-way electromagnetic directional valve; 316. a second pilot relief valve; 317. a sixth one-way valve; 318. a second hydraulic pump; 319. a fifth two-position two-way electromagnetic directional valve; 320. a fourth two-position two-way electromagnetic directional valve;
401. an embedded layer tube; 402. wrapping the embedded layer pipe part; 403. the embedded layer pipe part is not wrapped; 404. a wire shaping ring; 405. a first aluminum splice tube crimp segment; 406. an uncrimped section of the aluminum splicing sleeve; 407. and the two aluminum splicing sleeves are in crimping connection.
Detailed Description
In order to make the technical scheme of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.
See fig. 1-6;
the embodiment of the invention provides a novel embedded splicing sleeve extrusion bulging hydraulic system, which comprises:
the high-pressure oil control system 1 for providing a power source, which can achieve pressure increase and discharge by injection and discharge of high-pressure oil, includes: a motor 101 and a supercharger 103, the motor 101 and the supercharger 103 being disposed on a motor sump 105;
a die mounting mechanism 2, one end of the die mounting mechanism 2 being connected to the supercharger 103;
an axial compression system 3, said axial compression system 3 being connected to the other one of the die mounting mechanisms 2;
the first motor 101 is used for providing power for the first hydraulic pump 102, the motor oil tank 105 is connected with the input end of the first hydraulic pump 102, and the first hydraulic pump 102 is used as a low-pressure oil source of the high-pressure oil control system 1.
The first hydraulic pump 102 is respectively connected with a first two-position two-way electromagnetic directional valve 108 and a first one-way valve 110 through hydraulic pipelines, the first two-position two-way electromagnetic directional valve 108 is connected with a first pilot overflow valve 106 through hydraulic pipelines, the first pilot overflow valve 106 is used for setting the working pressure of the first hydraulic pump 102, and the first two-position two-way electromagnetic directional valve 108 is used for controlling the boosting and unloading of the first hydraulic pump 102.
The output end of the first hydraulic pump 102 is connected with a first check valve 110 through a hydraulic pipeline, and the first check valve 110 is connected with a two-position four-way electromagnetic directional valve 109 through a hydraulic pipeline.
The booster 103 forms a bidirectional booster circuit with a second check valve 111, a third check valve 112, a fourth check valve 113, a fifth check valve 114 and a two-position four-way electromagnetic directional valve 109 through hydraulic pipelines, one end of the bidirectional booster circuit is connected with the first check valve 110, the other end is connected with an oil inlet of a first pressure relay 115, and the first pressure relay 115 is connected with the second two-position two-way electromagnetic directional valve 107.
The bidirectional boost circuit may continuously provide a boost circuit of high pressure oil. The booster 103 adopts a booster cylinder, and the booster cylinder is provided with one large piston and two small pistons which are connected together through a piston rod.
When the first check valve 110 is turned on, the oil in the hydraulic pump oil tank 104 can flow to the two-position four-way electromagnetic directional valve 109 after passing through the first hydraulic pump 102, and then flow into the booster 103, and can also flow into the first pressure relay 115 after passing through the second check valve 111 and the fifth check valve 114; the oil returned by the first pressure relay 115 can flow out of the high-pressure oil control system 1 through the second two-position two-way electromagnetic directional valve 107, can flow out of the high-pressure oil control system 1 through the fourth one-way valve 113, the booster 103 and the two-position four-way electromagnetic directional valve 109 in sequence, and can also flow out of the high-pressure oil control system 1 through the fourth one-way valve 113, the third one-way valve 112 and the two-position four-way electromagnetic directional valve 109 in sequence.
The work of the two-position four-way electromagnetic directional valve 109 is controlled by an electromagnetic valve coil 6YA and an electromagnetic valve coil 7YA on the two-position four-way electromagnetic directional valve 109, the oil inlet passage of the two-position four-way electromagnetic directional valve 109 is controlled by the electromagnetic valve coil 6YA, and the oil outlet passage is controlled by the electromagnetic valve coil 7 YA; the two-position two-way electromagnetic directional valve 108 is controlled to act by an electromagnetic valve coil 9YA thereon; the two-position two-way electromagnetic directional valve 107 is controlled to act by an electromagnetic valve coil 8YA thereon; the booster 103 is provided with an SQ6 travel switch and an SQ7 travel switch, the SQ6 travel switch corresponds to the intake end of the booster 103 and is used as a travel switch of the intake end of the booster 103, the SQ7 travel switch corresponds to the exhaust end of the booster 103 and is used as a travel switch of the exhaust end of the booster 103, and the SQ6 travel switch and the SQ7 travel switch function as alternate limiting of injection pressure oil (alternate limiting of oil injected onto the inner mold 310 and the outer mold mounting mechanism 2 is performed through the SQ6 travel switch and the SQ7 travel switch). The first pressure relay 115 has a pressure controller SP2 thereon.
The die mounting mechanism 2 includes:
two symmetrically arranged frames 201, wherein two frames 201 are arranged on a stand 202, and the motor oil tank 105 is arranged on one side of the stand 202;
the crimping die 205, be provided with in the crimping die 205 in the mould support frame 204, the mould support frame 204 sets up between two frames 201, and on the mould support frame 204 installation and the frame 202, be provided with sealed flange 203 in the mould support frame 204, work piece 206 is located between mould support frame 204 and the sealed flange 203, and the surface and the work piece 206 of sealed flange 203 are connected, and sealed flange 203 is used for sealed work piece 206 and the space work piece between the mould support frame 204, the extrusion end of mould support frame 204 is provided with piston rod 207.
The crimping die 205 comprises an inner die 310 and an outer die 310 and an additional die 311, the additional die 311 is arranged in the inner die 310, the additional die 311 and the inner die 310 together form the complete crimping die 205, specifically, the inner die 310 and the outer die 310 are used for axially extruding the workpiece 206, the additional die 311 is used for fixing the workpiece 206, the additional die 311 is fixed in the inner tube of the splicing tube of the workpiece 206, and the additional die 311 provides pressure from inside to outside for the workpiece 206 in the radial direction; the inner and outer dies 310 are connected to the electrical signal output end of the first pressure relay 115, and the first pressure relay 115 is used for controlling the speed of the oil input to the inner and outer dies 310, i.e. controlling the axial compression joint of the inner and outer dies 310 to the workpiece 206.
The axial compression system 3 comprises:
a second hydraulic pump 318, the second hydraulic pump 318 is connected with the hydraulic pump oil tank 104, the hydraulic pump oil tank 104 is connected with the extrusion cylinder 312 through the oil delivery pipe 304, the second hydraulic pump 318 is positioned on the oil delivery pipe 304, and the extrusion cylinder 312 is connected with the piston rod 207; the piston rod 207 can contact the workpiece 206 by the action of the pressing cylinder 312, and the crimping die 205 is used to axially press the workpiece 206 and fix the workpiece 206.
The reversing valve 303 is arranged on the engine base oil tank 301, the reversing valve 303 is connected with the extrusion cylinder 312 through an oil return pipe 305, the reversing valve 303 is connected with the engine base oil tank 301 through the oil return pipe 305, the engine base oil tank 301 is used for recovering oil of the oil return pipe 305, and the engine base oil tank 301 is arranged on the other side of the engine base 202.
The second hydraulic pump 318 is connected to a third two-position two-way electromagnetic directional valve 315 through a hydraulic pipeline, the third two-position two-way electromagnetic directional valve 315 is connected to a second pilot relief valve 316 through a hydraulic pipeline, the second pilot relief valve 316 is used for setting the working pressure of the second hydraulic pump 318, and the third two-position two-way electromagnetic directional valve 315 is used for controlling the boosting and unloading of the second hydraulic pump 318.
The output end of the second hydraulic pump 318 is connected with a sixth check valve 317 through a hydraulic pipeline, the sixth check valve 317 is connected with the three-position four-way electromagnetic directional valve 307, the accumulator 306 and the second pressure relay 314 through hydraulic pipelines, the accumulator 306 is used for maintaining pressure of the extrusion cylinder 312, the second pressure relay 314 is used for converting working conditions, and the second pressure relay can be used for controlling the speed of oil input into the extrusion cylinder 312, namely controlling the extrusion of the workpiece 206 by the piston rod.
The working feeding of the extruding cylinder 312 adopts a serial speed regulation mode of the first throttle valve 308 and the second throttle valve 309, the two-time working switching is controlled by the fourth two-position two-way electromagnetic directional valve 320 and the fifth two-position two-way electromagnetic directional valve 319, the oil inlet P of the three-position four-way electromagnetic directional valve 307 is connected with the second hydraulic pump 318, the oil return port T is connected with the engine base oil tank 301, the working port a is connected with the left cavity (rodless cavity) of the extruding cylinder 312, the working port B of the three-position four-way electromagnetic directional valve 307 is connected with the first throttle valve 308 and the fifth two-position two-way electromagnetic directional valve 319, specifically, the working port B of the three-position four-way electromagnetic directional valve 307 is connected with the A end of the first throttle valve 308 and the A end of the fifth two-position two-way electromagnetic directional valve 319, the B end of the first throttle valve 308 is connected with the A end of the second throttle valve 309 and the A end of the fourth two-position two-way electromagnetic directional valve 320, and the B end of the fourth two-position two-way electromagnetic directional valve 320 is connected with the extruding cylinder 312.
The axial extrusion system 3 performs axial extrusion processing on a workpiece, a hydraulic actuating element of the axial extrusion system is an extrusion cylinder 312, the extrusion cylinder 312 can realize the actions of giving (feeding fast and slowly), maintaining pressure and withdrawing (withdrawing fast), the movement direction of the extrusion cylinder 312 is controlled by a three-position four-way electromagnetic directional valve 307, the working feeding of the extrusion cylinder 312 adopts a serial speed regulation mode of a first throttle valve 308 and a second throttle valve 309, the switching of the two-time working is controlled by a fifth two-way electromagnetic directional valve 320 and a fourth two-way electromagnetic directional valve 319, an oil inlet P of the three-position four-way electromagnetic directional valve 307 is connected with a second hydraulic pump 318, an oil return port T is connected with a base oil tank 301, a working port A is connected with a left cavity (rodless cavity) of the extrusion cylinder 312, a working port B is connected with a first throttle valve 308 and a fifth two-way electromagnetic directional valve 319, a working port B of the three-position four-way electromagnetic directional valve 307 is connected with an A end of the first throttle valve 308 and an A end of the two-way electromagnetic directional valve 319, a B end of the first two-way electromagnetic directional valve 308 is connected with an A end of the second throttle valve 309, an A end of the fourth two-way electromagnetic directional valve 320, and a second two-way electromagnetic directional valve 319 is connected with a second end of the two-way electromagnetic directional valve 309, and a two-way electromagnetic directional valve is connected with a second end of the two-way electromagnetic directional valve 309.
The action of the third two-position two-way electromagnetic directional valve 315 is controlled by the upper electromagnetic valve coil 5 YA. The second pressure relay 314 is provided with a pressure controller SP1. The three-position four-way electromagnetic directional valve 307 is controlled by the solenoid valve coil 2YA and the solenoid valve coil 1YA, the communication between the working port a of the three-position four-way electromagnetic directional valve 307 and the engine base oil tank 301 and the communication between the working port B and the second hydraulic pump 318 are controlled by the solenoid valve coil 1YA, and the communication between the working port a of the three-position four-way electromagnetic directional valve 307 and the second hydraulic pump 318 and the communication between the working port B and the engine base oil tank 301 are controlled by the solenoid valve coil 2YA. The two-position two-way electromagnetic directional valve 319 has an electromagnetic valve coil 3YA thereon. The two-position two-way electromagnetic directional valve 320 has an electromagnetic valve coil 4YA thereon.
All travel switches are positioned on the total control board, travel switch SQ1, travel switch SQ2, travel switch SQ3, travel switch SQ4, travel switch SQ5, travel switch SQ6 and travel switch SQ7 are connected in parallel to form a travel switch group, and as shown in fig. 6, manual and automatic selection is performed through LK three-position selector switches (with locks). The specific working conditions of the switches are as follows:
SQ1: when the piston rod 207 approaches the workpiece 206, the travel switch SQ1 acts to enable the solenoid valve coil 3YA to be electrified, the solenoid valve coil 1YA is continuously electrified, pressure oil of the hydraulic pump 102 enters a right cavity of the extrusion cylinder 312 through the sixth one-way valve 317, the three-position four-way electromagnetic directional valve 307, the first throttle valve 308 and the fifth two-position two-way electromagnetic directional valve 320, the left cavity of the extrusion cylinder 312 discharges oil to the hydraulic pump oil tank 105 through the three-position four-way electromagnetic directional valve 307, the piston rod 207 is converted from fast forward to one-time working, the workpiece is axially pre-extruded, and the extrusion speed is regulated by the first throttle valve 308.
SQ2: when the piston rod 207 is once in place, the travel switch SQ2 acts to cut off the solenoid valve coil 1YA and the solenoid valve coil 3YA, the piston rod 207 stops pushing, the extrusion system maintains pressure, meanwhile, the relay KM1 is electrified to enable the motor 101 to drive the additional die 311 to operate, the additional die 311 is withdrawn from the working position, and high-pressure oil of the internal expansion system continues to be input into the inner cavity of the workpiece 206.
SQ3: when the start button is pressed, the solenoid valve coil 1YA is electrified, so that the three-position four-way electromagnetic directional valve 307 is switched to the medium-pressure position, the pressure oil of the second hydraulic pump 318 enters the right cavity of the extrusion cylinder 312 through the sixth one-way valve 317 and the three-position four-way electromagnetic directional valve 307, the left cavity discharges oil to the engine base oil tank 301 through the three-position four-way directional valve 307, and the piston rod 207 is rapidly pushed leftwards. The travel switch SQ3 is actuated to de-energize the solenoid coil 1YA, and the inner and outer dies 310 and workpiece 206 are in place.
SQ4; when the additional die 311 is reset, the travel switch SQ4 acts, on the one hand, the relay KM2 is powered off, and the motor 101 drives the additional die 311 to stop running; on the other hand, solenoid valve coils 1YA, 3YA and 4YA are electrified, and pressure oil of the hydraulic pump 102 sequentially enters the right cavity of the extrusion cylinder 312 through a sixth one-way valve 317, a three-position four-way electromagnetic directional valve 307, a first throttle valve 308 and a second throttle valve 309, so that secondary working is realized.
SQ5: when the piston rod 207 is retracted to the home position, the travel switch SQ5 acts to de-energize all of the electromagnets 2YA, 8YA and 9 YA. All travel switches and solenoid valves (namely, the first two-position two-way solenoid valve 108, the second two-position two-way solenoid valve 107, the two-position four-way solenoid valve 109, the three-position four-way solenoid valve 307, the third two-position two-way solenoid valve 315, the fifth two-position two-way solenoid valve 320 and the fourth two-position two-way solenoid valve 319) are restored to the initial state, and are ready for a new round of processing.
SQ6 and SQ7: after the solenoid valve coil 3YA is electrified, the solenoid valve coil 6YA of the high-pressure oil control system 1 is electrified, the two-position four-way electromagnetic directional valve 109 is switched to the left position to conduct the oil inlet path, and the two-position four-way electromagnetic directional valve 109 is continuously commutated by alternately electrifying the booster 103, the travel switch SQ6 and the travel switch SQ7 of the two-way booster circuit and the solenoid valve coil 6YA and the solenoid valve coil 7YA, so that high-pressure oil is continuously input into the inner cavity of the workpiece 206.
Fig. 5 is a simplified crimping model of a steel-cored aluminum strand embedded aluminum splicing sleeve, which comprises an embedded pipe 401, an outer embedded layer variable step aluminum pipe, an aluminum splicing sleeve and a wire shaping ring 404, wherein the embedded pipe 401 is embedded between 19 twisted steel strands of a round wire concentric twisted overhead wire and 19 twisted steel-cored aluminum strands of the round wire concentric twisted overhead wire, and wraps the round wire concentric twisted overhead wire 19 twisted steel strands after central butt crimping, the outer embedded layer variable step aluminum pipe 402 is embedded outside the round wire concentric twisted overhead wire 19 twisted steel strands, and simultaneously wraps and inserts the embedded pipe and the non-embedded pipe for a distance, the outer embedded layer variable step aluminum pipe comprises a wrapped embedded pipe part 402 and a non-wrapped embedded pipe part 403, the wire shaping ring 404 is fixed at the position of +20mm of the connecting end of the 19 twisted steel-cored aluminum strand splicing sleeve, and the aluminum splicing sleeve is outside the outer embedded layer variable step aluminum pipe so that the embedded pipe 401 is tightly attached to the round wire concentric twisted steel strands of the round wire concentric twisted overhead wire, and the outer embedded layer variable step aluminum pipe is tightly attached to the round wire concentric twisted steel strands to the round wire 19 twisted steel strands, and the outer embedded layer variable step aluminum pipe is attached to the round wire, and the aluminum splicing sleeve is tightly attached to the round wire concentric twisted wire layer twisted steel wire, and forms an aluminum splicing sleeve. The aluminum connecting tube comprises a first aluminum connecting tube crimping section 405, an aluminum connecting tube non-crimping section 406 and a second aluminum connecting tube crimping section 407, and the lengths of the first aluminum connecting tube crimping section, the second aluminum connecting tube crimping section 407 and the externally-embedded variable-step aluminum tube are the same.
When the piston of the extrusion cylinder 312 of the extrusion bulging machine is in situ, the compression mold 205 is placed in the mold supporting rod 204 and uniformly sleeved on the workpiece 206, namely, uniformly sleeved on the non-compression joint sections on the Quan Zhangli aluminum splicing sleeve, the embedded aluminum pipe and the wire qualitative ring, after the workpiece 206 and the compression mold 205 are installed, the hydraulic pump 102 and the motor 101 are started, the motor 101 is used for conveying hydraulic oil, hydraulic pressure is provided, and the structure can enter an automatic machining process. The switching of the system conditions is achieved by means of the travel switches SQ 1-SQ 7 and the first pressure relay 115 (and the second pressure relay 314) mounted at various locations on the press expander.
The specific process comprises the following steps:
a. the ram 312 is fast-forwarding (advancing). When the button SB1 is pressed, the solenoid valve coil 1YA is energized to switch the three-position four-way electromagnetic directional valve 307 to the right position (i.e., the middle position is the middle pressure of the three positions of middle seal, middle bleed and middle pressure), the pressure oil of the second hydraulic pump 318 enters the right chamber (rod chamber) of the squeeze cylinder 312 through the sixth check valve 317 and the three-position four-way electromagnetic directional valve 307, the left chamber is discharged to the engine base oil tank 301 through the three-position four-way directional valve 307, and the piston rod 207 is rapidly pushed to the left.
b. And (5) performing one-time operation. When the piston rod 207 approaches the workpiece 206, i.e. the piston rod 207 is about to contact the workpiece 206, the travel switch SQ1 is operated to energize the solenoid valve coil 3YA, at this time, the fifth two-position two-way electromagnetic directional valve 319 is closed, the solenoid valve coil 1YA continues to be energized, the pressurized oil of the second hydraulic pump 318 enters the right cavity of the extrusion cylinder 312 through the sixth one-way valve 317, the three-position four-way electromagnetic directional valve 307, the first throttle valve 308 and the fourth two-position two-way electromagnetic directional valve 320, at this time, the fourth two-position two-way electromagnetic directional valve 320 is closed, the left cavity of the extrusion cylinder 312 discharges oil to the engine base oil tank 301 through the three-position four-way electromagnetic directional valve 307, the piston rod 207 is converted from fast forward to one-time operation, so that the workpiece 206 is axially pre-extruded by the inner and outer dies 310, and the extrusion speed is set by the first throttle valve 308.
c. High-pressure oil is injected into the workpiece 206 by the high-pressure oil control system 1 through the two-position four-way electromagnetic directional valve 109. The solenoid valve coil 3YA continues to be electrified, and meanwhile, the solenoid valve coil 6YA of the high-pressure oil control system 1 is electrified, namely, the two-position four-way electromagnetic directional valve 109 is switched to the left position shown in fig. 2 (namely, the oil inlet passage is conducted), the two-position four-way electromagnetic directional valve 109 is continuously commutated by means of alternating electrification of the solenoid valve coil 6YA and the solenoid valve coil 7YA by means of the supercharger 103, the travel switch SQ6 and the travel switch SQ7, and high-pressure oil is continuously input into the inner cavity of the workpiece 206 through the supercharger 103.
The supercharger 103 is a double-acting supercharger, the travel switch SQ6 is connected with a left end circuit of the supercharger 103 in series, the electromagnetic directional valve 6YA is controlled to work, the travel switch SQ7 is connected with a right end circuit of the supercharger 103, and the electromagnetic directional valve 7YA is controlled to work.
The second check valve 111, the third check valve 112, the fourth check valve 113 and the fifth check valve 114 form a bidirectional pressurization circuit with the double-acting supercharger 103 and the two-position two-way electromagnetic directional valve 109. After the travel switch SQ6 is communicated with a circuit at the left end of the booster 103, the electromagnetic directional valve 6YA works, and pressure oil output by the hydraulic pump 102 enters a large oil cavity and a small oil cavity at the left end of the booster cylinder through the two-position two-way electromagnetic directional valve 109 to push the piston to move rightwards; the oil in the large oil cavity at the right end of the booster cylinder flows back to the oil tank through the two-position two-way electromagnetic directional valve 109, and the oil in the small oil cavity at the right end of the booster cylinder is output through the fifth one-way valve 114. At this time, the second check valve 112 and the fourth check valve 114 are closed.
The travel switch SQ7 is connected with a circuit at the right end of the booster 103, the electromagnetic directional valve 7YA works, and pressure oil output by the first hydraulic pump 102 enters a large oil cavity and a small oil cavity at the right end of the booster cylinder through the two-position two-way electromagnetic directional valve 109 to push the piston to move reversely and leftwards; the oil in the large oil cavity at the left end of the booster cylinder flows back to the oil tank through the two-position two-way electromagnetic directional valve 109, and the oil in the small oil cavity at the left end of the booster cylinder is output through the fifth one-way valve 114. At this time, the second check valve 111 and the fourth check valve 113 are closed.
When the piston rod 207 is pushed to the left until the inner and outer dies 310 axially press the workpiece 206 to a theoretical position, that is, when the axially pressed workpiece 206 meets the requirement, the travel switch SQ3 is operated to turn off the solenoid valve coil 1YA, and high-pressure oil is injected into the workpiece 206 through the two-position four-way electromagnetic directional valve 109 and the booster 103.
The workpiece 206 is gradually shortened by axial pre-extrusion on the one hand by simultaneous operation of one-time feeding and injection of high-pressure oil with set pressure; on the other hand, the high-pressure oil causes the inner part region of the workpiece 206 to expand and deform outwards in a ring, the circumferential size of the workpiece is increased, and the workpiece 206 forms initial waves under the combined action of axial pre-extrusion and high-pressure internal expansion.
d. Removing the additional die 311, i.e., away from the workpiece 206), after the piston rod 207 is once advanced into place, the travel switch SQ2 is actuated to de-energize the solenoid valve coil 1YA, de-energize the solenoid valve coil 3YA (the SQ2 travel switch is serially connected with the solenoid valve coils 1YA and 3YA, de-energize the solenoid valve coils 1YA and 3YA after the travel switch SQ2 is actuated), the two-position two-way solenoid directional valve 319 is brought into communication from the closed state, the piston rod 207 stops advancing, the compression system maintains pressure, and simultaneously the relay KM1 in the PLC electronic control system is energized to drive the additional die 31, the motor 101 is used to deliver hydraulic oil to provide hydraulic pressure, the additional die 311 is withdrawn from the working position, and the high pressure oil control system 1 continues to hold the input of high pressure oil into the inner cavity of the workpiece 206.
e. And (5) secondary working. When the additional die 311 is regulated to reset through the switches KM1 and KM2, the additional die 311 acts on the workpiece 206 again after resetting, and the travel switch SQ4 is started, so that on one hand, the relay KM2 is powered off to stop the motor 101; on the other hand, the solenoid valve coil 1YA, the solenoid valve coil 3YA and the solenoid valve coil 4YA are electrified, the two-position two-way electromagnetic directional valve 32 is in a closed state from a communicating state, and the pressure oil of the second hydraulic pump 318 sequentially enters the right cavity of the extrusion cylinder 312 through the sixth one-way valve 317, the three-position four-way electromagnetic directional valve 307, the first throttle valve 308 and the second throttle valve 309, so that secondary working is realized. The secondary working speed is smaller than the primary working speed and is determined by the opening degree of the second throttle 309. The workpiece 206 continues to deform and shorten by axial compression, while the high pressure oil of the internal expansion, which is increased to a fixed value, will cause the workpiece 206 with the initial corrugation to continue bulging until the workpiece 206 assumes the corrugated shape constrained by the crimping die 205, i.e., the workpiece 206 will be constrained by the inner and outer dies 310 after internal expansion, as shown in fig. 5.
f. And (5) maintaining pressure. When the secondary work is in place, the second pressure relay 314 acts when the pressure of the axial extrusion system 3 reaches the set value of the second pressure relay 314, the solenoid valve coil 1YA, the solenoid valve coil 3YA and the solenoid valve coil 4YA are powered off to enable the three-position four-way electromagnetic directional valve 307, the fourth two-position two-way electromagnetic directional valve 320 and the fifth two-position two-way electromagnetic directional valve 319 to be restored to the positions shown in fig. 3 (namely, the three-position four-way electromagnetic directional valve 307 is restored to the middle position, the fifth two-position two-way electromagnetic directional valve 319 and the fourth two-position two-way electromagnetic directional valve 320 are both in the communication position), the solenoid valve coil 5YA is powered on to enable the third two-position two-way directional valve 315 to be switched to the upper position (the oil outlet channel is conducted), the hydraulic pump 102 is unloaded, the sixth one-way valve 317 is automatically closed, the extrusion cylinder 312 is maintained by the accumulator 306, the plastic deformation during the workpiece forming is stabilized, at this time, the internal expansion high-pressure oil continues to be input into the inner cavity of the workpiece 206, the fixed high-pressure is kept, the time relay T37 starts timing, and the time relay T37 is arranged on the hydraulic pipeline connecting the first one-way valve 110 and the two-position electromagnetic directional valve 109.
g. Releasing the high-pressure oil. After the timing of the time relay T37 expires, the solenoid valve coil 6YA and the solenoid valve coil 7YA are de-energized, and simultaneously, the solenoid valve coil 8YA and the solenoid valve coil 9YA are energized, the solenoid valve coil 8YA is energized to switch the second two-position two-way electromagnetic directional valve 107 to the right position (the right position is the oil outlet passage of the second two-position two-way electromagnetic directional valve 107 being on), and the solenoid valve coil 9YA is energized to switch the first two-position two-way electromagnetic directional valve 108 to the upper position (the upper position is the oil outlet passage of the first two-position two-way electromagnetic directional valve 108 being on). The first hydraulic pump 102 is unloaded, and the high-pressure oil in the hole of the workpiece 206 is released and discharged back to the engine base oil tank 301 through the second two-position two-way electromagnetic directional valve 107.
h. And (5) fast backing. When the high-pressure oil is released to zero, the first pressure relay 115 turns off the solenoid valve coil 5YA and turns on the solenoid valve coil 2YA, the third two-way two-position electromagnetic directional valve 315 is reset (the oil inlet channel is conducted), the three-position four-way electromagnetic directional valve 307 is switched to the left position (middle seal), the pressure oil of the second hydraulic pump 318 sequentially enters the left cavity of the extrusion cylinder 312 through the sixth one-way valve 317 and the three-position four-way electromagnetic directional valve 307, the right cavity discharges oil to the engine base oil tank 301 through the fourth two-way electromagnetic directional valve 320 and the three-position four-way electromagnetic directional valve 307, and the piston of the extrusion cylinder 312 rapidly retreats.
i. In situ: when the piston rod 207 is retracted to the home position, the travel switch SQ5 is operated to turn off the solenoid valve coil 2YA, the solenoid valve coil 8YA, and the solenoid valve coil 9 YA. All travel switches and solenoid valve coils are restored to an initial state, namely all solenoid valve coils are not electrified, all travel switches are not started, and preparation is made for a new round of processing.
Referring to fig. 6, according to the actual I/O interface and other controlled objects, the system adopts S72200 series programmable controllers, and according to the control requirement of the system, 13 person-conveying points and 13 output points are required, so CPU226 is selected as a control module. The existing input/output points can meet the requirements of the system without expansion, wherein the input/output power supply of the PLC is direct current 24V, and the normally open contact of the input end switching device is selected. The intelligent control system comprises a travel switch SQ1, a travel switch SQ2, a travel switch SQ3, a travel switch SQ4, a travel switch SQ5, a travel switch SQ6, a travel switch SQ7, a button SB1, a button SB2, a three-position rotation selecting switch LK (with a lock), a pressure controller SP1, a pressure controller SP2, an alternating current contactor KM1, an alternating current contactor KM2, a solenoid valve coil 1YA, a solenoid valve coil 2YA, a solenoid valve coil 3YA, a solenoid valve coil 4YA, a solenoid valve coil 5YA, a solenoid valve coil 6YA, a solenoid valve coil 7YA, a solenoid valve coil 8YA, a solenoid valve coil 9YA, an intermediate relay KA, an indicator lamp A1, an audible and visual alarm A2 and an audible and visual alarm A3. According to the process characteristics of the extrusion bulging machine, in order to ensure the normal operation of the machine, the PLC program is designed as 3 parts: and (3) manually running the program, automatically running the program and carrying out emergency interruption. The manual operation mode and the automatic operation mode are switched by a change-over switch LK, and the whole processing process is automatically completed in the automatic operation mode; when the manual operation mode is adopted, each step is advanced once, the start button is needed to be pressed once, and the stop button is pressed to automatically retract. In the control module of the CPU226, the travel switches SQ1, SQ2, SQ3, SQ4, SQ5, SQ6 and SQ7 are connected in parallel to form a total travel switch, and the functions of the total travel switch are fast forward limit, one-time work forward limit, workpiece die in-place, additional die reset, fast backward limit and injection pressure oil alternate limit. The buttons SB1 and SB2 can respectively control the start and stop of the PLC wiring circuit, and the manual operation mode and the automatic operation mode are switched by switching the three-position selector switch LK. Pressure controllers SP1 and SP2 pressure controllers can set pressures, and reaching a pressure set point can achieve contact closure and zero pressure control. When the coils of the alternating-current contactors KM1 and KM2 are electrified, the corresponding normally open contacts are closed, so that the circuit is connected (220V-380V), the additional die 311 is removed, and then the main power supply is connected. The alternating-current contactor KM1, the travel switch SQ2 and the power supply of the additional die motor are connected in series, after the travel switch SQ2 acts, the normally open contact of the alternating-current contactor KM1 is closed to enable the power supply of the additional die motor to be connected, and the motor 101 operates to enable the additional die to exit from the working position; the alternating-current contactor KM2, the travel switch SQ4 and the additional die motor power supply are connected in series, after the travel switch SQ2 acts, the normally open contact of the alternating-current contactor KM1 is closed, so that the additional die motor power supply is disconnected, the motor 101 stops running, and the additional die is withdrawn from the working position. The electromagnetic valve coil layers formed by parallel connection of the electromagnetic valve coils 1YA, 2YA, 3YA, 4YA, 5YA, 6YA, 7YA, 8YA and 9YA play roles in controlling the on-off of the electromagnetic valve, unloading the extrusion pump and the high-pressure pump, and injecting and releasing high-pressure oil. The intermediate relay KA is electrically contacted when the coil is electrified to switch on the circuit (24V-220V) for protecting output. The A1 indicator lamp is used for indicating the running state, and the A2 and A3 audible and visual alarms can give out sound and light to alarm when the system fails to run.
The components of the present application are preferably as follows:
an electric motor: YE2 three-phase asynchronous motor
Hydraulic pump: sireddsq
A supercharger: new style XP01-08-10-15
Travel switch WKJDHK-2T
Oil tank of hydraulic pump: yingshang force process WB418
Motor oil tank: large-gloss power motoo
Pilot-operated relief valve: tsunami force on DBDS6K
Controlling an electromagnet: waytopWCGD-102A
Two-position two-way electromagnetic reversing valve: mingchang valve 2W
Check valve: fengquan valve H61X/H62X/H64X
Two-position four-way electromagnetic reversing valve: tai Ming YC24D-15
A frame: APCAR201
And (3) a stand: stand KX-TG32-4
Sealing connection disc: environment-friendly YJD star-shaped red poise
And (3) supporting a die: auspicious music YQ-110
Crimping die: JSTAD-955 manufactured by Japanese pressed terminal
A piston rod: baobao machine 40cr
And (3) a hydraulic cylinder: monarch sail cylinder type hydraulic cylinder HC
Reversing valve: hongdehao 4WE6D61/OFCG24Z5
Oil delivery pipe: excellent road 6mm-203mm
Oil return pipe: cummins/Conmins ISM/QSM
An energy accumulator: he Deke SB330-4A1/112U-330A
Three-position four-way electromagnetic reversing valve: binding force BL4WE06H
Throttle valve: EST/Isst ASC200-08
And (3) extruding a cylinder: part force QF-500T
A button: schneider electric XB2BW33B1C
Three-position selector switch (with lock): schneider electrical K1D002ULHC
A pressure controller: aisonic VC-4000
An alternating current contactor: schneider electric LC1D38M7C
Solenoid valve coil: fei Situo solenoid valve coil MSFG-24/42-50/604527
An intermediate relay: schneider electric RXM2LB2ED
Indication lamp: schneider electrical XB4BVM4
An audible and visual alarm: yuexian YX02K-R
The electric components used by the novel embedded splicing sleeve extrusion bulging hydraulic system are all commercial products.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the invention, which is defined by the appended claims.
Claims (9)
1. Novel embedded splicing sleeve extrusion bulging hydraulic system, characterized in that, this support includes:
high pressure oil control system (1) for providing a power source, comprising: a motor (101) and a supercharger (103), the motor (101) and the supercharger (103) being arranged on a motor oil tank (105);
the die mounting mechanism (2), one end of the die mounting mechanism (2) is connected with the supercharger (103);
an axial extrusion system (3), the axial extrusion system (3) being connected to the other of the die mounting mechanisms (2);
the first motor (101) is used for providing power for the first hydraulic pump (102), the motor oil tank (105) is connected with the input end of the first hydraulic pump (102), and the first hydraulic pump (102) is used as a low-pressure oil source of the high-pressure oil control system (1);
the die mounting mechanism (2) includes:
two symmetrically arranged frames (201), wherein two frames (201) are arranged on a machine base (202), and the motor oil tank (105) is arranged on one side of the machine base (202);
crimping mould (205), be provided with in crimping mould (205) in mould support frame (204), mould support frame (204) set up between two frames (201), mould support frame (204) are installed and are on frame (202), be provided with sealed flange (203) in mould support frame (204), work piece (206) are located between mould support frame (204) and sealed flange (203), and the surface and the work piece (206) of sealed flange (203) are connected, and sealed flange (203) are used for sealed space work piece between work piece (206) and the mould support frame (204), the extrusion end of mould support frame (204) is provided with piston rod (207).
2. The novel embedded splicing sleeve extrusion bulging hydraulic system according to claim 1, wherein the first hydraulic pump (102) is respectively connected with the first two-position two-way electromagnetic directional valve (108) and the first one-way valve (110) through hydraulic pipelines, the first two-position two-way electromagnetic directional valve (108) is connected with the first pilot overflow valve (106) through hydraulic pipelines, the first pilot overflow valve (106) is used for setting the working pressure of the first hydraulic pump (102), and the first two-position two-way electromagnetic directional valve (108) is used for controlling the boosting and unloading of the first hydraulic pump (102).
3. The novel embedded splicing sleeve extrusion bulging hydraulic system according to claim 2, wherein the output end of the first hydraulic pump (102) is connected with a first one-way valve (110) through a hydraulic pipeline, and the first one-way valve (110) is connected with a two-position four-way electromagnetic reversing valve (109) through the hydraulic pipeline.
4. A novel embedded splicing sleeve extrusion bulging hydraulic system according to claim 3, wherein the booster (103) forms a bidirectional booster circuit with the second check valve (111), the third check valve (112), the fourth check valve (113), the fifth check valve (114) and the two-position four-way electromagnetic reversing valve (109) through hydraulic pipelines respectively, one end of the bidirectional booster circuit is connected with the first check valve (110), the other end of the bidirectional booster circuit is connected with an oil inlet of the first pressure relay (115), and the first pressure relay (115) is connected with the second two-position two-way electromagnetic reversing valve (107).
5. The novel embedded splicing sleeve extrusion bulging hydraulic system according to claim 1, wherein the crimping die (205) comprises an inner die (310) and an outer die (311), and the additional die (311) is arranged in the inner die (310).
6. A new in-line splicing sleeve extrusion bulging hydraulic system according to claim 1, characterized in that said axial extrusion system (3) comprises:
the second hydraulic pump (318), the second hydraulic pump (318) connects the hydraulic pump oil tank (104), the said hydraulic pump oil tank (104) connects the extrusion cylinder (312) through the oil delivery pipe (304), the said second hydraulic pump (318) locates at the oil delivery pipe (304), the said extrusion cylinder (312) connects with piston rod (207); the piston rod (207) can contact the workpiece (206) through the action of the extrusion cylinder (312), and the crimping die (205) is used for axially extruding the workpiece (206) and fixing the workpiece (206).
The reversing valve (303), reversing valve (303) set up on frame oil tank (301), reversing valve (303) are connected extrusion jar (312) through return oil pipe (305), reversing valve (303) are connected frame oil tank (301) through return oil pipe (305), and frame oil tank (301) are used for retrieving the oil of return oil pipe (305), and frame oil tank (301) set up in the opposite side of frame (202).
7. The novel embedded splicing sleeve extrusion bulging hydraulic system according to claim 6, wherein the second hydraulic pump (318) is connected with a third two-position two-way electromagnetic directional valve (315) through a hydraulic pipeline, the third two-position two-way electromagnetic directional valve (315) is connected with a second pilot overflow valve (316) through a hydraulic pipeline, the second pilot overflow valve (316) is used for setting the working pressure of the second hydraulic pump (318), and the third two-position two-way electromagnetic directional valve (315) is used for controlling the boosting and unloading of the second hydraulic pump (318).
8. The novel embedded splicing sleeve extrusion bulging hydraulic system according to claim 7, wherein the output end of the second hydraulic pump (318) is connected with a sixth one-way valve (317) through a hydraulic pipeline, and the sixth one-way valve (317) is respectively connected with the three-position four-way electromagnetic reversing valve (307), the energy accumulator (306) and the second pressure relay (314) through hydraulic pipelines.
9. The novel embedded splicing sleeve extrusion bulging hydraulic system according to claim 8, wherein the extrusion cylinder (312) is connected with the first throttling valve (308) and the second throttling valve (309) which are connected in series, the two-time working switching of the extrusion cylinder (312) is controlled by a fourth two-position two-way electromagnetic directional valve (320) and a fifth two-position two-way electromagnetic directional valve (319), and the three-position four-way electromagnetic directional valve (307) is respectively connected with the second hydraulic pump (318), the engine base oil tank (301), the extrusion cylinder (312), the first throttling valve (308) and the fifth two-position two-way electromagnetic directional valve (319) through hydraulic pipelines.
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| GB768258A (en) * | 1954-06-08 | 1957-02-13 | Fawcett Preston & Co Ltd | Improvements in or relating to hydraulic pressure intensifiers or boosters |
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