CN202343616U - Moulding equipment for tube end of hard tube and hydraulic control system thereof - Google Patents
Moulding equipment for tube end of hard tube and hydraulic control system thereof Download PDFInfo
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- CN202343616U CN202343616U CN2011205237481U CN201120523748U CN202343616U CN 202343616 U CN202343616 U CN 202343616U CN 2011205237481 U CN2011205237481 U CN 2011205237481U CN 201120523748 U CN201120523748 U CN 201120523748U CN 202343616 U CN202343616 U CN 202343616U
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Abstract
The utility model provides moulding equipment for the tube end of a hard tube and a hydraulic control system thereof. The hydraulic control system of the moulding equipment for the tube end of the hard tube comprises an oil tank (16), a hydraulic oil pump (83) and a feeding oil cylinder (11), wherein the feeding oil cylinder (11) is connected to an extrusion moulding part in a driving manner, and connected to the hydraulic oil pump (83) and the oil tank (16) via a first hydraulic loop (17) respectively; and a first reversing valve (13) is arranged on the first hydraulic loop (17). The hydraulic control system further comprises a clamping oil cylinder, wherein the clamping oil cylinder is communicated with the hydraulic oil pump (83) and the oil tank (16) via a second hydraulic loop (88); the second hydraulic loop (88) and the first hydraulic loop (17) are arranged in parallel; and a second reversing valve (87) is arranged on the second hydraulic loop (88). The hydraulic control system of the moulding equipment for the tube end of the hard tube provided by the utility model is stable in structure, high in reliability, low in cost and high in production efficiency.
Description
Technical field
The utility model relates to the hydraulic machinery field in the engineering machinery, in particular to a kind of hard tube pipe end former and hydraulic control system thereof.
Background technology
Hydraulic hard tube is widely used in engineering machinery; Particularly in the high pressure field; Owing to the stability of the uniqueness that it had receives much concern, and since its cost of manufacture well below sebific duct, it is more and more obvious that hydraulic hard tube replaces the trend that is arranged on the sebific duct that does not have the relative motion position.For a long time, the making of hydraulic hard tube mainly contains dual mode, and a kind of is outside steel pipe, to withhold cutting ferrule; Adding sealing ring with the conical surface of cutting ferrule or the conical surface seals; The advantage of this mode of production mode is that production efficiency is high, and shortcoming is that the repetition assembling is poor, and cutting ferrule is restricted by import parts; Cost is high, and the production capacity expansion is limited.Another kind is to adopt the mode of welding that modular connection is welded on the steel pipe, and the advantage of this production method is that the sealing of joint is relatively good, and shortcoming is that production efficiency is low, and welding quality is difficult to control, and welding quality defects causes easily to be leaked and stop up.
The utility model content
The utility model aims to provide a kind of hard tube pipe end former and hydraulic control system thereof, Stability Analysis of Structures, and reliability is high, and is with low cost, and production efficiency is high.
To achieve these goals; An aspect according to the utility model; A kind of hydraulic control system of hard tube pipe end former is provided, has comprised fuel tank, hydraulic oil pump and feed cylinder, feed cylinder drives the extrusion modling portion that is connected to hard tube pipe end former; And be connected to hydraulic oil pump and fuel tank respectively through first hydraulic circuit; First hydraulic circuit is provided with first reversal valve of control feed cylinder switching-over, and hard tube pipe end moulding hydraulic control system also comprises the clamping oil cylinder that drives the clamping device that is connected to hard tube pipe end former, is communicated with through second hydraulic circuit between clamping oil cylinder and hydraulic oil pump and the fuel tank; The parallelly connected setting with first hydraulic circuit of second hydraulic circuit, second hydraulic circuit are provided with second reversal valve of control clamping oil cylinder switching-over.
Further, the clamping oil cylinder comprises the first clamping oil cylinder and the second clamping oil cylinder that parallel connection is provided with, and the rodless cavity of the first clamping oil cylinder is communicated with the rodless cavity of the second clamping oil cylinder, and the rod chamber of the first clamping oil cylinder is communicated with the rod chamber of the second clamping oil cylinder.
Further, the oil circuit between the rod chamber of the first clamping oil cylinder and second reversal valve is provided with first sequence valve, and the oil circuit between the rodless cavity of the second clamping oil cylinder and second reversal valve is provided with second sequence valve.
Further, second hydraulic circuit comprises that at oil-feed oil circuit between clamping oil cylinder and the hydraulic oil pump and the oil return circuit between clamping oil cylinder and fuel tank, first sequence valve and second sequence valve all are arranged on the oil-feed oil circuit.
Further, be provided with hydraulic lock between the feed cylinder and first reversal valve.
Further, the hydraulic oil delivery side of pump is provided with check valve.
Further, the hydraulic oil delivery side of pump is provided with overflow passage, and overflow passage is provided with overflow valve.
According to the utility model on the other hand, a kind of hard tube pipe end former is provided, has comprised the hydraulic control system of hard tube pipe end former, the hydraulic control system of hard tube pipe end former is the hydraulic control system of above-mentioned hard tube pipe end former.
Use the technical scheme of the utility model, hydraulic control system comprises feed cylinder and clamping oil cylinder, and feed cylinder is connected to the extrusion modling portion of hard tube pipe end former, and the clamping hydraulic oil cylinder driving is connected to the clamping device of hard tube pipe end former.Respectively feed cylinder and clamping oil cylinder are controlled through hydraulic control system, adopted single pump heavy wool cylinder control technology, guarantee feed cylinder and clamping oil cylinder working stability, simple in structure, reliability is high, effectively increases work efficiency.Second hydraulic circuit between the rod chamber of the first clamping oil cylinder and second reversal valve is provided with first sequence valve, and second hydraulic circuit between the rodless cavity of the second clamping oil cylinder and second reversal valve is provided with second sequence valve.Through sequence valve the job order of the first clamping oil cylinder and the second clamping oil cylinder is controlled, can be satisfied the moulding needs, guarantee Forming Quality.Be provided with hydraulic lock between the feed cylinder and first reversal valve, can when moulding, keep the moulding pressure stability, thereby guarantee Forming Quality.
Description of drawings
The accompanying drawing that constitutes the part of the utility model is used to provide the further understanding to the utility model, and illustrative examples of the utility model and explanation thereof are used to explain the utility model, do not constitute the improper qualification to the utility model.In the accompanying drawings:
Fig. 1 shows the structure principle chart according to the hydraulic control system of the hard tube pipe end former of the embodiment of the utility model;
Fig. 2 shows the structural representation according to the hard tube pipe end former of the embodiment of the utility model;
Fig. 3 show according to the A-A of Fig. 2 to the broken section structural representation;
Fig. 4 shows the extrusion modling half module structural representation according to the hard tube pipe end former of the embodiment of the utility model;
Fig. 5 shows the left TV structure sketch map according to Fig. 4;
Fig. 6 shows the structural representation according to second clamping device of the hard tube pipe end former of the embodiment of the utility model;
Fig. 7 shows the structural representation according to first clamping device of the hard tube pipe end former of the embodiment of the utility model;
Fig. 8 shows B-B according to Fig. 6 to the sectional structure sketch map;
Fig. 9 shows C-C according to Fig. 7 to the sectional structure sketch map;
Figure 10 shows the structural representation according to the guide pad of the hard tube pipe end former of the embodiment of the utility model; And
Figure 11 shows the plan structure sketch map according to Figure 10.
The specific embodiment
Hereinafter will and combine embodiment to specify the utility model with reference to accompanying drawing.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
Like Fig. 2 or shown in Figure 3, according to the embodiment of the utility model, hard tube pipe end former comprises work supporting bable tops 70, feeding portion 10, clamping part 20, extrusion modling portion 30 and heating part 50.Clamping part 20, extrusion modling portion 30 and heating part 50 set gradually along the direction of feed of feeding portion 10.Feeding portion 10 is arranged on the outer end of extrusion modling portion 30, and drive extrusion modling portion 30 to hard tube 40 to be formed away from or draw close.Clamping part 20 clamps hard tube 40 to be formed, makes hard tube 40 to be formed in moulding in extrusion modling portion 30 under the effect of feeding portion 10.Heating part 50 is arranged between extrusion modling portion 30 and the clamping part 20; Hard tube 40 to be formed is in getting into extrusion modling portion 30 before the moulding; Be introduced in the heating part 50 and heat; So that make hard tube 40 to be formed have good plasticity, be convenient to moulding in extrusion modling portion 30, and can have good Forming Quality.When hard tube 40 moulding to be formed; Heating part 50 is near extrusion modling portion 30; Make hard tube 40 to be formed after being heated to suitable temperature, directly get into moulding in the extrusion modling portion 30, this moment, hard tube 40 to be formed had more excellent plasticity, and continuity is better; Efficient is higher, and Forming Quality is more guaranteed.
Extrusion modling portion 30 is arranged on the work supporting bable tops 70 through forming part installing plate 60, and feed cylinder 11 is connected on the forming part installing plate 60.The bottom of forming part installing plate 60 is provided with rail plate; Be correspondingly provided with sliding guide groove on the work supporting bable tops 70; Under the driving action of feed cylinder 11; Forming part installing plate 60 can slide along sliding guide groove, thus drive extrusion modling portion 30 away from or near hard tube 40 to be formed, with the pipe end moulding of accomplishing hard tube 40 to be formed with take out action.
Extrusion modling portion 30 comprises moulding extrusion die 31 and plug 32, and plug 32 is arranged in the moulding extrusion die 31 and stretches out moulding extrusion die 31.Plug 32 includes the step axle that matches with hard tube 40 to be formed; Little shaft portion can get in the pipe of hard tube 40 to be formed; Formation is to the radial location of hard tube 40 to be formed, and the large-diameter portion branch can form the axial location to hard tube 40 to be formed, guarantees the pipe end constructions of hard tube 40 to be formed.The big footpath of plug 32 equals the external diameter of hard tube 40 to be formed, and path equals the internal diameter of hard tube 40 to be formed.The extension elongation of plug 32 is advisable so that hard tube 40 to be formed is formed good radial location.Plug 32 can also can be removably disposed in to be squeezed in the pattern 31 with to be squeezed into pattern 31 one-body molded.In the present embodiment, first end of plug 32 is arranged in the plug mounting blocks 33, and through bolt plug 32 is fixedly connected with plug mounting blocks 33.Second end of plug 32 passes and is squeezed into pattern 31 and stretches out and be squeezed into outside the pattern 31, and when moulding, hard tube 40 to be formed is formed the location.When the specification of hard tube 40 to be formed and shape change, can change plug 32, simple in structure, easy to use to adapt to new moulding needs, adaptability is good.On the plug 32 pad can also be set, control the distance of moulding end distance, satisfy the needs of hard tube pipe end moulding from the mouth of pipe through the thickness of adjustment pad.
Be squeezed into pattern 31 and comprise adjustable first being squeezed into pattern 311 and second and being squeezed into pattern 312 of relative distance; First is squeezed into the bottom that pattern 311 and second is squeezed into pattern 312 is provided with by first slide rail 313, and forming part installing plate 60 is provided with first gathering sill 61 that cooperates with first slide rail 313.First gathering sill 61 is arranged on the forming part installing plate 60 perpendicular to the length direction of hard tube 40 to be formed, and the motion that is squeezed into pattern 31 is formed guide effect.First be squeezed into pattern 311 the outer end be connected with first driving mechanism, first drive mechanism first is squeezed into pattern 311 and slides along first gathering sill 61, thereby realizes the clamping of extrusion forming mould 31 and unclamp action.First driving mechanism is a telescoping mechanism; Can be cylinder etc.; In the present embodiment, first driving mechanism is connected on the forming part installing plate 60 for the piston rod that is fixedly installed on the first clamping oil cylinder, 14, the first clamping oil cylinders 14 on the forming part installing plate 60 through fixed support 12.The first clamping oil cylinder, 14 along continuous straight runs are arranged on a side that is squeezed into pattern 31, are fixed on the forming part installing plate 60, move along direction of feed with being squeezed into pattern 31.The first clamping oil cylinder 14 be connected first be squeezed into pattern 311 side direction, be used to control the folding mould action that is squeezed into pattern 31, its clamping and unclamp the direction of feed of direction perpendicular to feeding portion 10.
On forming part installing plate 60, also comprise being parallel to second gathering sill 62 that first gathering sill 61 is provided with, between first gathering sill 61 and second gathering sill 62, be provided with lever 63.In second gathering sill 62, be mounted slidably bending connecting rod 64, the bending angle of bending connecting rod 64 is the right angle, and first end of bending connecting rod 64 is hinged to first end of lever 63, second end of bending connecting rod 64 be hinged on first be squeezed into pattern 311 the outer end.Second end of lever 63 be hinged to second be squeezed into pattern 312 the outer end.When being squeezed into pattern 31 when being in the matched moulds state; Be squeezed into pattern 31, lever 63 and bending connecting rod 64 and form square structure; When being squeezed into pattern 31 when being in die opening state; Bending connecting rod 64 is squeezed into pattern 311 to the movement outside that is squeezed into pattern 31 with first, and under the induced effect of bending connecting rod 64, first end that is connected with bending connecting rod 64 and the bending connecting rod 64 of lever 63 move in the same way; Lever 63 with second be squeezed into second end that pattern 312 is connected along first be squeezed into pattern 311 direction of motion counter motion, thereby realize that through lever 63 and bending connecting rod 64 first is squeezed into the synchronous on-off that pattern 311 and second is squeezed into pattern 312 and moves.Lever 63 and bending connecting rod 64 also can be set here, and make second to be squeezed into pattern 312 and to be fixedly installed on the forming part installing plate 60.
Be squeezed into pattern 31 and can be the combination of a plurality of laminated structures, can make on the one hand to be squeezed into 31 pairs of hard tubes 40 realizations to be formed of pattern clamping positioning action more uniformly, can realize the moulding needs of the hard tube pipe end constructions of more specifications on the other hand.
Please combine referring to Fig. 4 and shown in Figure 5; First of the pattern 31 that is squeezed into of the embodiment of the utility model is squeezed into pattern 311 and second and is squeezed into pattern 312 and includes two parts platy structure that is connected through bolt, is squeezed into the centre position that pattern 311 and second is squeezed into pattern 312 first and is provided with plug installing hole that adapts with plug 32 shapes and the pipe end constructions extrusion modling hole that is used for moulding hard tube 40 to be formed.
Please combine referring to Fig. 6 to shown in Figure 9; Clamping part 20 is fixedly installed on the work supporting bable tops 70; Include clamping device installing plate 21 and clamping device 22, clamping device 22 is arranged on the clamping device installing plate 21 along the length direction perpendicular to hard tube 40 to be formed movably.Clamping device 22 comprises first holder 221 and the outer end of second holder, 222, the first holders 221 that cooperate with first holder 221 is connected with second driving mechanism, and second drive mechanism, first holder 221 steps up or unclamps hard tube 40 to be formed.Second holder 222 can be fixedly installed on the clamping device installing plate 21, also can be slidably disposed on the clamping device installing plate 21.Second driving mechanism is here for to be fixedly installed on the second clamping oil cylinder 23 on the clamping device installing plate 21 through fixed support 12.Second driving mechanism also can be other telescoping mechanism.The second clamping oil cylinder horizontal fixed is arranged on the clamping device installing plate 21 or the supporting bable tops 70 of working, and flexible direction is controlled the holding action of clamping device 22 perpendicular to the direction of feed of feeding portion 10.
The medium position correspondence of first holder 221 and second holder 222 is provided with the clamping hole that matches with the external diameter of hard tube 40 to be formed, is interference fit between this clamping hole and the hard tube to be formed 40.First holder 221 is fixedly attached on the second clamping oil cylinder 23 through connecting bolt.
Heating part 50 comprises the heat induced coil, and hard tube 40 to be formed is located in the heat induced coil.The heat induced coil is provided with near extrusion modling portion 30; To guarantee after the part to be formed of hard tube 40 to be formed fully heats, can to get into moulding in the extrusion modling portion 30 rapidly; Make the part to be formed of hard tube 40 to be formed keep good plasticity; Reduce greatly and pressure, save the extruding power consumption, reduce production costs.The heat induced coil can be fixedly installed on the forming part installing plate 60, also can be slidably disposed on work supporting bable tops 70 or the forming part installing plate 60.
When hard tube 40 to be formed was heated, the electric current that feeds in the heat induced coil was an electric current of intermediate frequency, and power frequency is 3000～8000HZ, and heating-up temperature is 900 to 1150 degrees centigrade.The Kelvin effect that electric current of intermediate frequency can avoid high frequency electric to bring, make hard tube 40 to be formed inside and outside the surface quality of being heated after the even extrusion modling good, do not need machined can satisfy the joint requirement.900 to 1150 degrees centigrade heating-up temperature makes steel pipe softer; Hot extrusion is mobile better, is more conducive to hard tube 40 to be formed and fully is squeezed into forming surface, improves the extrusion modling quality; Also help the protection tube mouth structure, prevent that the structure to hard tube 40 to be formed causes damage in the extrusion modling process.The heat induced coil also can replace with heating arrangements such as induction furnaces.
Please combine referring to Figure 10 and shown in Figure 11, can also at least one guidance set 24 be set along the length direction of hard tube 40 to be formed on the clamping device installing plate 21, guidance set 24 comprises first guide pad 241 and second guide pad 242 that relative distance is adjustable.Comprise waist shape installing hole 243 on first guide pad 241 and second guide pad 242, and be arranged on the clamping device installing plate 21 through the bolt that is arranged in the waist shape installing hole 243.Hard tube 40 to be formed is arranged between first guide pad 241 and second guide pad 242.When changing the hard tube 40 to be formed of different tube diameters; Can regulate the spacing between first guide pad 241 and second guide pad 242 through the position of bolt in waist shape installing hole 243 of adjusting on first guide pad 241 and second guide pad 242, make guidance set 24 can supporting role preferably be arranged to hard tube 40 to be formed all the time.
Among each above-mentioned embodiment, the cross sectional shape of guide rail can be V-arrangement, Y shape, T shape, circular or other shape.
Please combine referring to shown in Figure 1, hard tube pipe end former also includes the hydraulic control system of control feed cylinder 11, the first clamping oil cylinder 14 and 23 actions of the second clamping oil cylinder.This hydraulic control system comprises fuel tank 16, hydraulic oil pump 83, drive the drive motors 82 of hydraulic oil pump 83, be arranged on the output of hydraulic oil pump 83 check valve 81, be arranged on the skimmer circuit in check valve 81 downstream and be arranged on the overflow valve 84 on the skimmer circuit; Also comprise feed cylinder 11; Feed cylinder 11 is connected to hydraulic oil pump 83 and fuel tank 16 respectively through first hydraulic circuit 17; First hydraulic circuit 17 is provided with first reversal valve 13 of control feed cylinder 11 switching-overs; Between first reversal valve 13 and feed cylinder 11, also be provided with hydraulic lock 15; Can form the pressurize effect to feed cylinder 11, it is stable that hard tube 40 to be formed can be keep-uped pressure when moulding, guarantees Forming Quality.Reversal valve can be pilot operated directional control valve, hand-operated direction valve or solenoid directional control valve, and in the middle of the present embodiment, reversal valve is solenoid directional control valve.
Hydraulic oil flows out from fuel tank 16; Convert pressure oil into through hydraulic oil pump 83; Flow into feed cylinder 11 through first reversal valve 13 then; The expanding-contracting action of control feed cylinder 11, the fluid that overflows of feed cylinder 11 flows back in the fuel tank 16 through first hydraulic circuit 17 from the return line of first reversal valve 13, uses so that continue.
Hydraulic control system also comprises the clamping oil cylinder; The clamping oil cylinder is connected to hydraulic oil pump 83 and fuel tank 16 respectively through second hydraulic circuit 88; Second hydraulic circuit 88 and the 17 parallelly connected settings of first hydraulic circuit, second hydraulic circuit 88 are provided with second reversal valve 87 of control clamping oil cylinder switching-over.The clamping oil cylinder comprises the first clamping oil cylinder 14 and the rodless cavity of the second clamping oil cylinder, 23, the first clamping oil cylinders 14 and the rodless cavity UNICOM of the second clamping oil cylinder 23 that parallel connection is provided with, the rod chamber UNICOM of the rod chamber of the first clamping oil cylinder 14 and the second clamping oil cylinder 23.
Second hydraulic circuit 88 between the rod chamber of the first clamping oil cylinder 14 and second reversal valve 87 is provided with the rodless cavity of first sequence valve, 86, the second clamping oil cylinders 23 and second hydraulic circuit 88 between second reversal valve 87 is provided with second sequence valve 85.
Second hydraulic circuit 88 comprises that at oil-feed oil circuit between clamping oil cylinder and the hydraulic oil pump 83 and the oil return circuit between clamping oil cylinder and fuel tank 16, first sequence valve 86 and second sequence valve 85 all are arranged on the oil-feed oil circuit.
When the pipe end moulding that begins hard tube 40 to be formed, as required the length of hard tube is carried out blanking with the length of the required consumption of pipe end moulding earlier, and the final moulding length of assurance hard tube can satisfy design demand.For example
(diameter is 12mm; Pipe thickness is 2mm) hard tube; Need be the cone seal body of 24 degree at the tapering that length of end face extrusion modling is 10mm; During blanking; The monolateral hard tube moulding consumption length that needs to consider is 17.2mm, i.e. need to consider to increase the monolateral pipe range of 7.2mm in the blanking process.
After blanking is accomplished; Hard tube 40 to be formed is inserted in the electromagnetic induction coil; Plug 32 is got into about the interior 2mm of moulding end face of hard tube 40 to be formed, hard tube 40 to be formed is formed radial locations, second reversal valve 87 is got; Spool is positioned at the left side station of second reversal valve 87; The right side station UNICOM of second reversal valve 87, hydraulic oil gets into rodless cavity one side of the first clamping oil cylinder 14 and the second clamping oil cylinder 23, and carries hydraulic oil to the rodless cavity of the first clamping oil cylinder 14 and the second clamping oil cylinder 23.Under the effect of hydraulic oil, the first clamping oil cylinder 14 stretches out, and clamps plug 32, and plug 32 is formed radial location, and forms the pressing mold space.The second clamping oil cylinder 23 of this moment is owing to the inhibition of second sequence valve 85, and hydraulic oil can not get in the rodless cavity of the second clamping oil cylinder 23, and the second clamping oil cylinder 23 maintains the original state.
Hydraulic oil continues to carry; After the pressure of hydraulic oil overcame the resistance of second sequence valve 85, second sequence valve 85 was opened, and hydraulic oil gets in the rodless cavity of the second clamping oil cylinder 23; The piston rod of the second clamping oil cylinder 23 stretches out, and makes clamping device 22 clamp hard tube 40 to be formed.Clamp plug 32 formation pressing mold spaces through being squeezed into pattern 31 earlier; The advantage that clamps hard tube 40 to be formed through clamp mechanism 22 again is; Earlier find the steel pipe center accurately with plug 32, after avoiding clamping hard tube 40 to be formed earlier, hard tube 40 off-centre to be formed cause losing of plug 32 when the moulding feeding.
After clamping hard tube 40 to be formed, start the heat induced coil power, utilize electric current of intermediate frequency to be added in the end inserting branch of the hard tube 40 hot to be formed in the heat induced coil, make hard tube 40 deliquescing to be formed.The power frequency preferred 3000 that feeds is to 8000HZ, and the part to be formed of moulding hard tube 40 is heated to 900 to 1150 degrees centigrade.On this temperature, carry out extrusion modling, can make the portion of hot to be formed of deliquescing hard tube 40 to be formed mobile better, be more conducive to extruding; Can part to be formed fully be squeezed into forming surface during extruding; And extruding force reduces greatly, saves the extruding power consumption, reduces production costs.
Cut off the heat induced coil power afterwards; First reversal valve 13 is got; Control feed cylinder 11 feedings make to be squeezed into pattern 31 and to draw close to hard tube 40 to be formed, and make and be squeezed into pattern 31 and reach predetermined stroke end; Make first reversal valve, 13 dead electricity then, make feed cylinder 11 keep briquetting pressure 15 to 300 seconds.
The left station of controlling second reversal valve 87 is in UNICOM's state, this moment hydraulic oil UNICOM's to the first clamping oil cylinder 14 and the second clamping oil cylinder 23 rod chamber one side, and to the rod chamber conveying hydraulic oil of the first clamping oil cylinder 14 and the second clamping oil cylinder 23.Under the effect of hydraulic oil, the piston rod of second clamping cylinder 23 retraction, clamping device 22 unclamps in type hard tube.And under the drag effect of first sequence valve 86, hydraulic oil can't get into the rod chamber of the first clamping oil cylinder 14, and the piston rod of the first clamping oil cylinder 14 keeps stretching out state.After the pressure of hydraulic oil overcame the resistance of first sequence valve 86, under the effect of hydraulic oil, piston rod bounced back, and unclamped to be squeezed into pattern 31.Control 13 switching-overs of first reversal valve then, make feed cylinder 11 retractions, accomplish a molding cycle.In the rapping process; Unclamp earlier be squeezed into pattern may because of molded hard tube can not radial deflection and cause forming surface pulled situation; Therefore, need control clamping cylinder with sequence valve and drive earlier clamp mechanism 22 and unclamp molded hard tube, unclamp then and be squeezed into pattern 31.
From above description; Can find out; The utility model the above embodiments have realized following technique effect: hydraulic control system comprises feed cylinder and clamping oil cylinder; Feed cylinder is connected to the extrusion modling portion of hard tube pipe end former, and the clamping hydraulic oil cylinder driving is connected to the clamping device of hard tube pipe end former.Respectively feed cylinder and clamping oil cylinder are controlled through hydraulic control system, adopted single pump heavy wool cylinder control technology, guarantee feed cylinder and clamping oil cylinder working stability, simple in structure, reliability is high, effectively increases work efficiency.Second hydraulic circuit between the rod chamber of the first clamping oil cylinder and second reversal valve is provided with first sequence valve, and second hydraulic circuit between the rodless cavity of the second clamping oil cylinder and second reversal valve is provided with second sequence valve.Through sequence valve the job order of the first clamping oil cylinder and the second clamping oil cylinder is controlled, can be satisfied the moulding needs, guarantee Forming Quality.Be provided with hydraulic lock between the feed cylinder and first reversal valve, can when moulding, keep the moulding pressure stability, thereby guarantee Forming Quality.
The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (8)
1. the hydraulic control system of a hard tube pipe end former; It is characterized in that; Comprise fuel tank (16), hydraulic oil pump (83) and feed cylinder (11); Said feed cylinder (11) drives the extrusion modling portion that is connected to said hard tube pipe end former; And be connected to said hydraulic oil pump (83) and said fuel tank (16) respectively through first hydraulic circuit (17); Said first hydraulic circuit (17) is provided with first reversal valve (13) of the said feed cylinder of control (11) switching-over, and said hard tube pipe end moulding hydraulic control system also comprises the clamping oil cylinder that drives the clamping device be connected to said hard tube pipe end former, is communicated with through second hydraulic circuit (88) between said clamping oil cylinder and said hydraulic oil pump (83) and the said fuel tank (16); Said second hydraulic circuit (88) and the parallelly connected setting of said first hydraulic circuit (17), said second hydraulic circuit (88) are provided with second reversal valve (87) of the said clamping oil cylinder switching-over of control.
2. the hydraulic control system of hard tube pipe end former according to claim 1; It is characterized in that; Said clamping oil cylinder comprises the first clamping oil cylinder (14) and the second clamping oil cylinder (23) that parallel connection is provided with; The rodless cavity of the said first clamping oil cylinder (14) is communicated with the rodless cavity of the said second clamping oil cylinder (23), and the rod chamber of the said first clamping oil cylinder (14) is communicated with the rod chamber of the said second clamping oil cylinder (23).
3. the hydraulic control system of hard tube pipe end former according to claim 2; It is characterized in that; Oil circuit between the rod chamber of the said first clamping oil cylinder (14) and said second reversal valve (87) is provided with first sequence valve (86), and the oil circuit between the rodless cavity of the said second clamping oil cylinder (23) and said second reversal valve (87) is provided with second sequence valve (85).
4. according to the hydraulic control system of the hard tube pipe end former described in the claim 3; It is characterized in that; Second hydraulic circuit (88) comprise be positioned at the oil-feed oil circuit between said clamping oil cylinder and the said hydraulic oil pump (83) and be positioned at said clamping oil cylinder and said fuel tank (16) between oil return circuit, said first sequence valve (86) and said second sequence valve (85) all are arranged on the said oil-feed oil circuit.
5. according to the hydraulic control system of each described hard tube pipe end former in the claim 1 to 4, it is characterized in that, be provided with hydraulic lock (15) between said feed cylinder (11) and said first reversal valve (13).
6. the hydraulic control system of hard tube pipe end former according to claim 5 is characterized in that, the output of said hydraulic oil pump (83) is provided with check valve (81).
7. the hydraulic control system of hard tube pipe end former according to claim 5 is characterized in that, the output of said hydraulic oil pump (83) is provided with overflow passage, and said overflow passage is provided with overflow valve (84).
8. hard tube pipe end former; The hydraulic control system that comprises hard tube pipe end former; It is characterized in that the hydraulic control system of said hard tube pipe end former is the hydraulic control system of each described hard tube pipe end former in the claim 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205237481U CN202343616U (en) | 2011-12-14 | 2011-12-14 | Moulding equipment for tube end of hard tube and hydraulic control system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205237481U CN202343616U (en) | 2011-12-14 | 2011-12-14 | Moulding equipment for tube end of hard tube and hydraulic control system thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202343616U true CN202343616U (en) | 2012-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205237481U Expired - Fee Related CN202343616U (en) | 2011-12-14 | 2011-12-14 | Moulding equipment for tube end of hard tube and hydraulic control system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202343616U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954059A (en) * | 2012-11-19 | 2013-03-06 | 无锡九条龙汽车设备有限公司 | Connecting method of sequence valve action loop of hydraulic system |
| CN109595129A (en) * | 2018-12-13 | 2019-04-09 | 北京金风科创风电设备有限公司 | Impeller locking hydraulic system and wind generating set |
-
2011
- 2011-12-14 CN CN2011205237481U patent/CN202343616U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954059A (en) * | 2012-11-19 | 2013-03-06 | 无锡九条龙汽车设备有限公司 | Connecting method of sequence valve action loop of hydraulic system |
| CN109595129A (en) * | 2018-12-13 | 2019-04-09 | 北京金风科创风电设备有限公司 | Impeller locking hydraulic system and wind generating set |
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