CN110258271A - A kind of milling machine and its control method - Google Patents
A kind of milling machine and its control method Download PDFInfo
- Publication number
- CN110258271A CN110258271A CN201910549597.8A CN201910549597A CN110258271A CN 110258271 A CN110258271 A CN 110258271A CN 201910549597 A CN201910549597 A CN 201910549597A CN 110258271 A CN110258271 A CN 110258271A
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- oil
- milling machine
- oil cylinder
- down assembly
- road surface
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/08—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades
- E01C23/085—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades using power-driven tools, e.g. vibratory tools
- E01C23/088—Rotary tools, e.g. milling drums
Abstract
The present invention relates to milling machine fields, disclose a kind of milling machine and its control method, wherein milling machine includes the milling and planing drum cut for road pavement, and the level-one splicing component of cutting swarf is accepted set on the front of milling and planing drum, the milling machine further includes holding down assembly, and the both ends of the level-one splicing component are equipped with being capable of holding down assembly relative to its rotation；Driving assembly, it is described be rotationally connected with it is described hold down assembly, and can drive it is described hold down assembly rotate so that it is described hold down assembly to be connected to road surface and adjust to hold down assembly act on the pressing force on operation road surface.In the milling machine course of work, it holds down assembly and is connected to untreated surface, make to be cut the road surface that the cutting swarf to be formed will not be not processed around related by milling and planing drum, keeps the volume of cutting swarf not too big, guarantee that cutting swarf will not block the material receiving port of level-one splicing component；And driving assembly can act on the pressing force on operation road surface according to adjusting to hold down assembly the case where level-one splicing component two sides road surface.
Description
Technical field
The present invention relates to milling machine field more particularly to a kind of milling machine and its control methods.
Background technique
Pavement milling machine is one of the equipment of asphalt pavement conserving construction machinery, is mainly used for highway, town road, machine
The excavations of the asphalt concrete pavements such as field, goods yard renovates, and can be used for removing road surface, to gather around packet, oily wave, reticulate pattern, track etc. scarce
It falls into, the milling that may further be used to the plucking and surface layer faulting of slab ends of excavated pavement pit slot and groove and cement pavement is flat.
When milling machine operation, machining is carried out to operation road surface by the milling and planing drum of milling machine, in order to avoid milling and planing drum is cut
Cut the waste for the ground surface material to be formed, it will usually be recycled to the ground surface material that milling and planing drum is handled.The prior art
In the mode that generallys use be setting level-one material-receiving device, milling and planing drum is accepted by the level-one material-receiving device, operation road surface is cut
The paveio(u)r obtained when processing is cut, it is subsequent that the ground surface material is recycled.
Because the construction technology that the waste recovery that pavement structure and milling are got off recycles needs, usual road pavement is layered
Construction, to carry out machining to different pavement structures.When encountering the poor section of adhesive layer, when milling machine operation, can be produced
Raw larger piece paveio(u)r (especially bitumen layer), and being greater than level-one material-receiving device in the size of large stretch of ground surface material can connect
When the full-size of the paveio(u)r of receipts, paveio(u)r can not be successfully the material receiving port into level-one material-receiving device, then lead to one
The material receiving port of grade splicing component is easily blocked by large-sized paveio(u)r, to influence the normal work of milling machine.
Summary of the invention
The purpose of the present invention is to provide a kind of milling machines, occur the sheet that can not be handled when can be avoided milling machine operation
Paveio(u)r, to guarantee milling machine normal operation.
Another object of the present invention is to provide a kind of control methods of milling machine, solve the splicing of level-one splicing component
The problem of mouth is easily blocked by large stretch of paveio(u)r.
To achieve this purpose, the present invention adopts the following technical scheme:
A kind of milling machine, including the milling and planing drum for being cut operation road surface, and set on the front of the milling and planing drum
To accept the level-one splicing component of cutting swarf, the milling machine further include:
It holds down assembly, the both ends of the level-one splicing component, which are equipped with, to hold down assembly relative to described in its rotation；
Driving assembly, the driving component be connected to it is described hold down assembly, and can drive it is described hold down assembly rotation with
It holds down assembly to be connected to hold down assembly described in operation road surface and adjusting described in making and acts on the pressing force on operation road surface.
As a kind of optimal technical scheme of above-mentioned milling machine, the driving component includes oil cylinder, be set to the oil cylinder without
Pressure sensor in rod cavity or rod chamber, and the hydraulic control unit that the control oil cylinder is flexible, the piston rod of the oil cylinder
It is rotationally connected with described hold down assembly；The hydraulic control unit includes:
Oil pump, fuel tank, the fuel tank, the oil pump and the oil cylinder are sequentially communicated and form circulation loop；
Control valve group, the control valve group can selectively be such that the piston rod of oil cylinder described in the oil pump control stretches out,
Retract or keep current state.
As a kind of optimal technical scheme of above-mentioned milling machine, the control valve group includes the first working condition, the second work
Make state and third working condition；
The control valve group is in the first working condition, and the rod chamber of the oil cylinder is connected to the oil outlet of the oil pump,
The rodless cavity of the oil cylinder is connected to the fuel tank；
The control valve group is in the second working condition, and the rodless cavity is connected to the oil outlet of the oil pump, described to have
Rod cavity is connected to the fuel tank；
The control valve group is in third working condition, and the rod chamber is connected to the rodless cavity.
As a kind of optimal technical scheme of above-mentioned milling machine, the hydraulic control unit further includes being located on the fuel tank
The decompression overflow valve of trip, the oil outlet of the oil pump are connected to the oil inlet of the decompression overflow valve, and the control valve group can
The rod chamber and/or the rodless cavity is selectively controlled to be connected to the oil inlet of the decompression overflow valve.
It further include rack as a kind of optimal technical scheme of above-mentioned milling machine, each described hold down assembly includes:
Multiple pressing plates, multiple pressing plates are sequentially connected, and at least one described press plate rotary is connected to the oil cylinder
Piston rod；
Rotation axis, each pressing plate of the rotation axis connection are simultaneously rotationally connected with the rack, and the rotation axis is opposite
It is fixed in the pressing plate.
The present invention also provides the control method of above-mentioned milling machine, in the milling machine course of work, the driving component is controlled
Movement acts on the pressing force on operation road surface to adjust described hold down assembly.
A kind of optimal technical scheme of control method as above-mentioned milling machine, the driving component include oil cylinder, are set to
Pressure sensor in the oil cylinder rodless cavity or rod chamber, and the hydraulic control unit that the control oil cylinder is flexible；The liquid
Pressing control unit includes oil pump, fuel tank and control valve group, and the control valve group can selectively make described in the oil pump control
Oil cylinder stretches out, retracts or keeps current state；
The rod chamber or the oil pressure in rodless cavity for obtaining the oil cylinder, and pre-set pressure range is obtained according to operation road surface,
The pre-set pressure range refers to corresponding pressing force range when being applied to different work road surface that holds down assembly；
According to the size relation of oil pressure range corresponding to the oil pressure and the pre-set pressure range, the control is adjusted
The working condition of valve group stretches out the piston rod of oil cylinder described in the oil pump control, retracts or keep current state, so that described
The pressing force for being applied to operation road surface hold down assembly in pre-set pressure range.
A kind of optimal technical scheme of control method as above-mentioned milling machine, in the oil pressure in the preset pressure model
When enclosing in corresponding oil pressure range, the piston rod that the control valve group controls the oil cylinder keeps current state.
A kind of optimal technical scheme of control method as above-mentioned milling machine, the oil pressure in the rod chamber of the oil cylinder
Greater than oil pressure range corresponding with the pre-set pressure range maximum value when, the control valve group controls the piston of the oil cylinder
Bar retracts；
Oil pressure in the rod chamber of the oil cylinder is less than the minimum of oil pressure range corresponding with the pre-set pressure range
When value, the piston rod that the control valve group controls the oil cylinder stretches out.
A kind of optimal technical scheme of control method as above-mentioned milling machine, the hydraulic control unit further include being located at
The decompression overflow valve of the fuel tank upstream, the oil outlet of the oil pump are connected to the oil inlet of the decompression overflow valve, the control
Valve group processed can selectively control the rod chamber and/or the rodless cavity and be connected to the oil inlet of the decompression overflow valve；
The cracking pressure of decompression overflow valve is adjusted according to operation road surface, the cracking pressure is more than or equal to and the default pressure
The maximum value of the corresponding oil pressure range of power range.
Beneficial effects of the present invention: the rotation that holds down assembly is set to the two sides of level-one splicing component by the present invention, and milling machine exists
In the course of work, driving assembly driving, which holds down assembly to rotate so as to hold down assembly, is connected to untreated surface, so that by milling
The cutting swarf that drum cutting is formed will not be not processed around related road surface, then make the volume of cutting swarf not too big,
Guarantee that level-one splicing component can accept cutting swarf and cutting swarf will not block the material receiving port of level-one splicing component；And driving group
Part can act on the pressing force on operation road surface according to adjusting to hold down assembly the case where level-one splicing component two sides road surface, guarantee pressure
The pressing force that tight component acts on operation road surface will not increase the running resistance of milling machine because excessive, will not be because of pressing force mistake
Effect small and that compression is not achieved.
The control method of milling machine provided by the invention, realize the milling machine course of work in, control driving assembly movement with
Adjusting holds down assembly and acts on the pressing force on operation road surface, guarantee to hold down assembly act on the pressing force on operation road surface will not be because of mistake
The effect of compression will not be not achieved because pressing force is too small in running resistance that is big and increasing milling machine.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, institute in being described below to the embodiment of the present invention
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also implement according to the present invention
The content of example and these attached drawings obtain other attached drawings.
Fig. 1 is the structural schematic diagram of milling machine provided in an embodiment of the present invention；
Fig. 2 is level-one splicing component provided in an embodiment of the present invention and the location diagram that holds down assembly；
Fig. 3 is the connection schematic diagram provided in an embodiment of the present invention to hold down assembly with rack；
Fig. 4 is the structural schematic diagram of pressing plate provided in an embodiment of the present invention；
Fig. 5 is the structural schematic diagram of hydraulic control unit provided in an embodiment of the present invention；
Fig. 6 is the control method flow chart that milling machine provided in an embodiment of the present invention uses automatic control mode.
In figure:
1, milling and planing drum；2, level-one splicing component；3, it holds down assembly；31, rotation axis；32, pressing plate；321, bent plate；322, pacify
Fill gusset；323, pin shaft；
41, oil cylinder；42, overflow valve is depressurized；
5, two position and four-way reversing valve；51, A1 mouthfuls；52, B1 mouthfuls；53, P1 mouthfuls；54, T1 mouthfuls；
6, three position four-way directional control valve；61, A2 mouthfuls；62, B2 mouthfuls；63, P2 mouthfuls；64, T2 mouthfuls；
7, rack；71, mounting plate.
Specific embodiment
To keep the technical problems solved, the adopted technical scheme and the technical effect achieved by the invention clearer, below
In conjunction with attached drawing and pass through specific embodiment to further illustrate the technical scheme of the present invention.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing and it is not all.
Fig. 1 is the structural schematic diagram of milling machine provided in this embodiment, including milling and planing drum 1 and level-one splicing component 2, wherein
Milling and planing drum 1 forms cutting swarf during milling and planing drum 1 works, level-one connects for cutting untreated operation road surface
Expect that component 2 is set to the front of dilute milling and planing drum 1 to accept cutting swarf, cutting swarf constantly will be pushed to level-one splicing by milling and planing drum 1
Component 2.The structure of above-mentioned milling and planing drum 1 and level-one splicing component 2 is the prior art, no longer superfluous in detail herein to chat.
Since milling and planing drum 1 is during cutting operation road surface, it is possible to the road surface of 1 two sides of milling and planing drum can be connected
Band gets up to be formed the excessive cutting swarf of volume, and the openings of sizes of material receiving port is limited on level-one splicing component 2, therefore usually large stretch of
Cutting swarf will cannot be introduced on level-one splicing component 2, cause level-one splicing component 2 block, and aggravate level-one splicing group
Abrasion between part 2 and cutting swarf.
Fig. 2 is level-one splicing component provided in this embodiment and the location diagram that holds down assembly, and Fig. 3 is that the present embodiment mentions
The connection schematic diagram to hold down assembly with rack supplied.As shown in Figures 1 to 3, the present embodiment is distinguished at the both ends of level-one splicing component 2
Setting holds down assembly 3, and during milling machine work, hold down assembly 3 road surfaces for being connected to 2 both ends of level-one splicing component, makes
The cutting swarf that is formed by the cutting of milling and planing drum 1 will not be not processed around related road surface, then make the volume of cutting swarf
It is not too big, guarantee that level-one splicing component 2 can accept cutting swarf and cutting swarf will not block the splicing of level-one splicing component 2
Mouthful.
Milling machine is equipped with rack 7, and holding down assembly 3 is rotationally connected with rack 7, and rack 7 is equipped with driving assembly, driving group
Part is connected to rack 7, driving assembly and 3 rotation connections that hold down assembly, and holds down assembly 3 relative to level-one by driving assembly control
Splicing component 2 rotates, and makes hold down assembly 3 abuttings or separating operation road surface.In the milling machine course of work, holding down assembly 3 is connected to
Operation road surface, when milling machine does not work, hold down assembly 3 separating operation road surfaces.
For the road surface of layering, such as grade road, usual base and surface layer composition, surface layer main material is pitch, base
Main material is cement stabilized macadam.Milling machine needs construction in layer when In Grade road is constructed.Due to base and face
The material of layer forms difference, and corresponding required pressing force is also just different, and the driving assembly in the present embodiment can be according to wait locate
The surface conditions of reason, adjust 3 pressing forces for acting on operation road surface that hold down assembly, and guarantee, which holds down assembly, 3 acts on operation road surface
Pressing force will not increase the running resistance of milling machine because excessive, the effect of compression will not be not achieved because pressing force is too small
Fruit.
Fig. 4 is the structural schematic diagram of pressing plate provided in this embodiment, and as shown in Figure 3 and Figure 4, each holding down assembly 3 includes
Rotation axis 31 and multiple pressing plates 32, plurality of pressing plate 32 are successively intervally arranged along the horizontal direction perpendicular to milling machine vehicle body,
Can by multiple pressing plates 32 by the welding of pin shaft 323, be bolted or other Automatic manual transmission modes link together, do not do herein
It is specific to limit.One piece of strip pressing plate 32 can also be used, by strip pressing plate 32 along the level side perpendicular to milling machine vehicle body
To extension.Preferably, rack 7 is equipped with multiple mounting plates 71, and mounting plate 71 is successively arranged alternately with pressing plate 32, rotation axis 31
One end sequentially passes through pressing plate 32 and mounting plate 71, and rotation axis 31 is fixed relative to pressing plate 32, and rotation axis 31 and mounting plate 71 rotate
Connection, driving assembly includes oil cylinder 41, at least one pressing plate 32 is rotationally connected with the piston rod of oil cylinder 41.In the piston of oil cylinder 41
When bar is stretched out or retracted, when pressing plate 32 will be rotated relative to rack 7, to adjust the pressing force that pressing plate 32 acts on operation road surface.
Further, as shown in figure 4, pressing plate 32 is in plow-shape structure, 321 He of bent plate for acting on operation road surface is specifically included
It is connected to the installing web plate 322 of 321 upper surface of bent plate.The corresponding central angle of bent plate 321 is preferably 140 ° -150 °, is guaranteeing to press
Under the premise of tight 2 two sides road surface of level-one splicing component, guiding movement is carried out, moving resistance is reduced.
Since bent plate 321 is in the milling machine course of work, compresses operation road surface for a long time and there are problems that serious wear,
For this purpose, bent plate 321 is made of wear-resistant material, and is equipped with wearing layer in the lower surface of bent plate 321, to reduce bent plate 321
The degree of wear.Preferably, wearing layer can be welded in the lower surface of bent plate 321, and wearing layer is made of existing wear-resistant material,
This no longer illustrated in greater detail, can determine according to use demand as the thickness of wearing layer, no longer limit herein.Certainly
One piece, two pieces three pieces or more can be can be in the lower surface inlaying abrasion-resistant alloy block of bent plate 321, the quantity of wear-resisting alloy block
It is more, it is preferred to use three pieces.The material that wear-resisting alloy block is made no longer limits herein, and wear-resisting property in the prior art is preferably resistance to
Adjustment gold can use.
Fig. 5 is the structural schematic diagram of hydraulic control unit provided in this embodiment, as shown in figure 5, driving assembly further includes
Pressure sensor in 41 rodless cavity of oil cylinder or rod chamber, and the hydraulic control unit that control oil cylinder 41 is flexible.Hydraulic control
Unit processed includes oil pump, fuel tank and control valve group, wherein fuel tank, oil pump and oil cylinder 41 are sequentially communicated and form circulation loop.It is logical
Overregulate the oil pressure in oil cylinder 41, i.e., adjustable 3 pressing forces for acting on operation road surface that hold down assembly.
For this purpose, the control valve group of the present embodiment has multiple working conditions can be according to not in the milling machine course of work
The pavement behavior of processing, the state of adjusting control valve group, so that the piston rod of oil pump control oil cylinder 41 stretches out, retracts or keep to work as
Preceding state.
The position being rotatablely connected based on rotation axis 31 and rack 7 and pressing plate 32 are connect with the piston rod rotation of oil cylinder 41
Positional relationship it is different, the piston rod of oil cylinder 41 can be made to stretch out, pressing plate 32 acts on the pressure reduction on operation road surface, oil cylinder 41
Piston rod retract, pressing plate 32 act on operation road surface pressure increase.The piston rod of oil cylinder 41 can also be made to stretch out, pressing plate 32
The pressure for acting on operation road surface increases, and the piston rod of oil cylinder 41 retracts, and the pressure that pressing plate 32 acts on operation road surface reduces.This
In embodiment, referring to shown in Fig. 2 and Fig. 4, oil cylinder 41 is located at the top of Anchor plate kit 3, the piston rod of oil cylinder 41 and 32 edge of pressing plate
The rear end thereof of milling machine direction of advance connects, and rotation axis 31 is located at pressing plate 32 along the front end of milling machine direction of advance, oil cylinder 41
Piston rod stretch out, pressing plate 32 act on operation road surface pressure reduce.
In the present embodiment, oil cylinder 41 is arranged in a one-to-one correspondence with pressing plate 32, and it is synchronous that hydraulic control unit controls two oil cylinders 41
Work, the possible height degree in road surface certainly based on 2 two sides of level-one splicing component is different, can also be by oil cylinder 41 and hydraulic control
Unit is arranged in a one-to-one correspondence.Below by taking hydraulic control unit controls two synchronous workings of oil cylinders 41 as an example, to hydraulic control unit
Structure describe in detail.
Specifically, control valve group includes the first working condition, the second working condition and third working condition；At control valve group
In the first working condition, the rod chamber of oil cylinder 41 is connected to the oil outlet of oil pump, and the rodless cavity of oil cylinder 41 is connected to fuel tank.The mistake
The extension elongation of Cheng Zhong, 41 piston rod of oil cylinder are gradually increased, and increase more situation suddenly suitable for operation road surface, can be reduced
It is applied to the pressing force on operation road surface, avoids pressing force excessive and increases the running resistance of milling machine, is reduced with pressing plate 32 to milling
The influence of planer operating efficiency.
Control valve group is in the second working condition, and rodless cavity is connected to the oil outlet of oil pump, and rod chamber is connected to fuel tank.It should
In the process, the extension elongation of 41 piston rod of oil cylinder is gradually reduced, and reduces many situations suddenly suitable for operation road surface, passes through increasing
Large plate 32 is applied to the pressing force on 2 two sides road surface of level-one splicing component, makes pressing plate 32 that can be connected to operation road surface always, no
It will appear large stretch of paveio(u)r, guarantee that level-one splicing component 2 being capable of smooth splicing.
Control valve group is in third working condition, and rod chamber is connected to rodless cavity.During being somebody's turn to do, 41 piston rod of oil cylinder is stretched
Length remains unchanged out, and the pressing force that pressing plate 32 is applied to untreated surface keeps in a certain range, being suitable for operation road surface
The case where planarization is held essentially constant.
In the present embodiment, control valve group include two position and four-way reversing valves 5 and a three position four-way directional control valve 6, two
Four-way reversing valve 5 has A1 mouth 51, B1 mouth 52, P1 mouth 53 and T1 mouth 54, and wherein A1 mouth 51 is connected to rod chamber, B1 mouth 52 and nothing
Rod cavity connection, two position and four-way reversing valves 5 electric must be in right position, and A1 mouth 51 is connected to P1 mouth 53, and B1 mouth 52 is connected to P1 mouth 53；Two
5 power loss of position and four-way reversing valve is in left position, and A1 mouth 51 is not connected to P1 mouth 53, B1 mouth 52 with T1 mouth 54.
Three position four-way directional control valve 6 has A2 mouth 61, B2 mouth 62, P2 mouth 63 and T2 mouth 64, wherein A2 mouth 61 and A1 mouth 51 connect
Logical, B2 mouth 62 is connected to B1 mouth 52, and P2 mouth 63 is connected to the oil outlet of oil pump, and T2 mouth 64 is connected to fuel tank.3-position 4-way commutation
6 left position of valve obtains electric, and A2 mouth 61 is connected to P2 mouth 63, and B2 mouth 62 is connected to T2 mouth 64；The right position of three position four-way directional control valve 6 obtains electric, A2
Mouth 61 is connected to T2 mouth 64, and B2 mouth 62 is connected to P2 mouth 63；6 power loss of three position four-way directional control valve is in middle position, A2 mouth 61, B2 mouth 62
It is connected to simultaneously with T2 mouth 64, P2 mouth 63 is not connected to A2 mouth 61, B2 mouth 62, T2 mouth 64.
When control valve group is in the first working condition, two position and four-way reversing valves 5 obtain electric in right position, three position four-way directional control valve
6 left positions obtain electric；When control valve group is in the second working condition, two position and four-way reversing valves 5 obtain electric in right position, 3-position 4-way commutation
The right position of valve 6 obtains electric；When control valve group is in third working condition, two position and four-way reversing valves, 5 power loss is in left position, and 3-position 4-way changes
Middle position is in 6 power loss of valve.
Increase suddenly much on road surface, the oil pressure in oil circuit can increase suddenly, and the amplitude increased is larger, due to control
The switching of valve group working condition needs the time, in order to avoid reduction pressing force increases and influence the traveling of milling machine, in fuel tank
Upstream setting decompression overflow valve 42, control valve group can selectively control rod chamber and/or rodless cavity and decompression overflow valve 42
Oil inlet connection, make no matter under any situation, at least one in rod chamber and rodless cavity can be with the oil inlet of decompression overflow valve 42
Mouth connection, the cracking pressure of decompression overflow valve 42 is adjusted according to operation road surface, which is more than or equal to pre-set pressure range
The maximum value of corresponding oil pressure range, adjusting decompression overflow valve 42 can open in time according to the oil pressure in 41 rod chamber of oil cylinder,
To guarantee oil pressure relief.
And the oil outlet of oil pump is connected to the oil inlet of decompression overflow valve 42, entire hydraulic control unit because of failure or
When operation road surface the reasons such as increases suddenly and oil pressure occurs and increase emergency, decompression overflow valve 42 can be used as safety valve use,
Guarantee the oil pressure relief of hydraulic control unit；And when 6 power loss of three position four-way directional control valve is in middle position, due to oil pump out of the mouth
The increase of oil pressure, decompression overflow valve 42 are opened, and the working oil that oil pump provides can be back to fuel tank by depressurizing overflow valve 42.
The present embodiment additionally provides a kind of control method of above-mentioned milling machine, in the milling machine course of work, controls driving group
Part movement is to adjust 3 pressing forces for acting on operation road surface that hold down assembly.
Above-mentioned control method includes MANUAL CONTROL mode and automatic control mode, and milling machine is equipped with control panel, control
Panel is equipped with MANUAL CONTROL mode and automatic control mode, controls milling machine to manually control mould to driver's property of can choose
Formula or automatic control mode work.
When milling machine is worked with automatic control mode, since driver can not see the road of 2 two sides of level-one splicing component
Face situation, can observe the surface conditions of 2 two sides of level-one splicing component in real time by support staff, and with phone or video or its
His any mode informs that driver, driver adjust the cracking pressure of decompression overflow valve 42 according to the surface conditions recognized, with
And the working condition of control valve group.Camera can also be set in the two sides of level-one splicing component 2, be connect level-one by camera
The surface conditions of material 2 two sides of component are cranked in real time on the display of milling machine driver's cabin, understand operation road convenient for driver
Face situation.
Fig. 6 is the control method flow chart that milling machine provided in this embodiment uses automatic control mode, as shown in fig. 6,
Milling machine adjusts the cracking pressure of decompression overflow valve 42, pressure sensor measurement oil according to the pressure in oil cylinder 41 in the present embodiment
Oil pressure in the rod chamber of cylinder 41 specifically uses the control of automatic control mode below with reference to Fig. 6 to milling machine in the present embodiment
Method processed is described in detail.
Oil pressure in S1, acquisition 41 rod chamber of oil cylinder, and corresponding pre-set pressure range, and root are obtained according to operation road surface
The cracking pressure of decompression overflow valve 42 is adjusted according to operation road surface.
Wherein, pre-set pressure range refers to and holds down assembly 3 pressing force range when being applied to different work road surface, makees
The case where industry road surface and pre-set pressure range correspond, and the operation road surface of unlike material and the difference of thickness of cutting are corresponding
Pre-set pressure range also all can be different, can by be repeated several times test determine unlike material operation road surface a variety of
Corresponding pre-set pressure range under thickness of cutting.
In the present embodiment, the cracking pressure of the corresponding decompression overflow valve 42 in different work road surface is different, depressurizes overflow valve 42
Cracking pressure is more than or equal to the maximum value of oil pressure range corresponding with pre-set pressure range.
The size relation of S2, the oil pressure range according to corresponding to oil pressure and pre-set pressure range in rod chamber adjust control
The working condition of valve group processed stretches out the piston rod of oil pump control oil cylinder 41, retracts or keep current state, so as to hold down assembly
3 are applied to the pressing force on operation road surface in pre-set pressure range.
Mainly include the following three types situation:
When S21, the oil pressure in rod chamber are in the corresponding oil pressure range of pre-set pressure range, adjusting control valve group makes to control
Valve group processed is in third working condition, and the piston rod that control valve group controls oil cylinder 41 keeps current state.
When S22, the oil pressure in rod chamber are greater than the maximum value of the corresponding oil pressure range of pre-set pressure range, control is adjusted
Valve group makes control valve group be in the second working condition, and the piston rod that control valve group controls oil cylinder 41 stretches out, until in rod chamber
Oil pressure is adjusted to third working condition in the oil pressure range corresponding to pre-set pressure range, then by control valve group.
When S23, the oil pressure in rod chamber are less than the minimum value of the corresponding oil pressure range of pre-set pressure range, control is adjusted
Valve group makes control valve group be in the first working condition, and the piston rod that control valve group controls oil cylinder 41 retracts, until in rod chamber
Oil pressure is adjusted to third working condition in the oil pressure range corresponding to pre-set pressure range, then by control valve group.
In the present embodiment, two position and four-way reversing valves 5, three position four-way directional control valve 6 and decompression overflow valve 42 are solenoid valve, and
And the adjusting of the cracking pressure of overflow valve 42 is depressurized, it can manually adjust, proportion magnetic valve can also be used, by adjusting electric current
Value adjusts the cracking pressure of proportion magnetic valve.
Obviously, the above embodiment of the present invention is just for the sake of clearly illustrating examples made by the present invention, and being not is pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention
Protection scope within.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ", only
For descriptive purposes, it is not understood to indicate or imply relative importance.Wherein, term " first position " and " second position "
For two different positions.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Claims (10)
1. a kind of milling machine including the milling and planing drum (1) for being cut operation road surface, and is set to the milling and planing drum (1)
Front is to accept the level-one splicing component (2) of cutting swarf, which is characterized in that the milling machine further include:
Hold down assembly (3), and the both ends of the level-one splicing component (2), which are equipped with, to hold down assembly relative to described in its rotation
(3)；
Driving assembly, the driving component be connected to it is described hold down assembly (3), and described (3) rotation that holds down assembly can be driven
So that it is described hold down assembly (3) be connected to operation road surface and hold down assembly described in adjusting (3) act on the pressing force on operation road surface.
2. milling machine according to claim 1, which is characterized in that the driving component includes oil cylinder (41), is set to described
Pressure sensor in oil cylinder (41) rodless cavity or rod chamber, and the hydraulic control unit that the control oil cylinder (41) is flexible, institute
The piston rod rotation for stating oil cylinder (41), which is connected to, described holds down assembly (3)；The hydraulic control unit includes:
Oil pump, fuel tank, the fuel tank, the oil pump and the oil cylinder (41) are sequentially communicated and form circulation loop；
Control valve group, the control valve group can selectively be such that the piston rod of oil cylinder described in the oil pump control (41) stretches out,
Retract or keep current state.
3. milling machine according to claim 2, which is characterized in that the control valve group includes the first working condition, second
Working condition and third working condition；
The control valve group is in the first working condition, and the rod chamber of the oil cylinder (41) is connected to the oil outlet of the oil pump,
The rodless cavity of the oil cylinder (41) is connected to the fuel tank；
The control valve group is in the second working condition, and the rodless cavity is connected to the oil outlet of the oil pump, the rod chamber
It is connected to the fuel tank；
The control valve group is in third working condition, and the rod chamber is connected to the rodless cavity.
4. milling machine according to claim 2, which is characterized in that the hydraulic control unit further includes being located at the fuel tank
The decompression overflow valve (42) of upstream, the oil outlet of the oil pump are connected to the oil inlet of decompression overflow valve (42), the control
Valve group processed can selectively control the rod chamber and/or the rodless cavity and the oil inlet of decompression overflow valve (42) connects
It is logical.
5. milling machine according to claim 2, which is characterized in that it further include rack (7), it is each described to hold down assembly (3)
Include:
Multiple pressing plates (32), multiple pressing plates (32) are sequentially connected, and at least one described pressing plate (32) is rotationally connected with institute
State the piston rod of oil cylinder (41)；
Rotation axis (31), the rotation axis (31) connects each pressing plate (32) and is rotationally connected with the rack (7), described
Rotation axis (31) is fixed relative to the pressing plate (32).
6. a kind of control method of the milling machine as described in any one of claim 1 to 5, which is characterized in that the milling machine course of work
In, the movement of control the driving component acts on the pressing force on operation road surface to adjust hold down assembly (3).
7. the control method of milling machine according to claim 6, which is characterized in that the driving component includes oil cylinder
(41), the pressure sensor being set in the oil cylinder (41) rodless cavity or rod chamber, and the liquid that the control oil cylinder (41) is flexible
Press control unit；The hydraulic control unit includes oil pump, fuel tank and control valve group, and the control valve group can selectively make
Oil cylinder described in the oil pump control (41) stretches out, retracts or keeps current state；
The rod chamber or the oil pressure in rodless cavity for obtaining the oil cylinder (41), and corresponding preset pressure is obtained according to operation road surface
Range, the pre-set pressure range refer to that hold down assembly (3) are applied to corresponding pressing force model when different work road surface
It encloses；
According to the size relation of oil pressure range corresponding to the oil pressure and the pre-set pressure range, the control valve group is adjusted
Working condition, stretch out the piston rod of oil cylinder described in the oil pump control (41), retract or keep current state, so that described
Hold down assembly (3) be applied to the pressing force on operation road surface in pre-set pressure range.
8. the control method of milling machine according to claim 7, which is characterized in that in the oil pressure in the preset pressure
When in the corresponding oil pressure range of range, the piston rod that the control valve group controls the oil cylinder (41) keeps current state.
9. the control method of milling machine according to claim 7, which is characterized in that in the rod chamber of the oil cylinder (41)
Oil pressure when being greater than the maximum value of oil pressure range corresponding with the pre-set pressure range, the control valve group controls the oil cylinder
(41) piston rod retracts；
Oil pressure in the rod chamber of the oil cylinder (41) is less than the minimum of oil pressure range corresponding with the pre-set pressure range
When value, the piston rod that the control valve group controls the oil cylinder (41) stretches out.
10. the control method of milling machine according to claim 7, which is characterized in that the hydraulic control unit further includes
Decompression overflow valve (42) positioned at the fuel tank upstream, the oil inlet of the oil outlet of the oil pump and decompression overflow valve (42)
Connection, the control valve group can selectively control the rod chamber and/or the rodless cavity and the decompression overflow valve
(42) oil inlet connection；
The cracking pressure of decompression overflow valve (42) is adjusted according to operation road surface, the cracking pressure is more than or equal to and the default pressure
The maximum value of the corresponding oil pressure range of power range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910549597.8A CN110258271A (en) | 2019-06-24 | 2019-06-24 | A kind of milling machine and its control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910549597.8A CN110258271A (en) | 2019-06-24 | 2019-06-24 | A kind of milling machine and its control method |
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| CN110258271A true CN110258271A (en) | 2019-09-20 |
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ID=67920909
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| CN201910549597.8A Pending CN110258271A (en) | 2019-06-24 | 2019-06-24 | A kind of milling machine and its control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111034581A (en) * | 2019-12-30 | 2020-04-21 | 长沙中能装备制造有限公司 | Branch chopper |
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