CN208109307U - A kind of hobboing cutter cutter ring cutter hub mating surface positive pressure force test system - Google Patents
A kind of hobboing cutter cutter ring cutter hub mating surface positive pressure force test system Download PDFInfo
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- CN208109307U CN208109307U CN201820222803.5U CN201820222803U CN208109307U CN 208109307 U CN208109307 U CN 208109307U CN 201820222803 U CN201820222803 U CN 201820222803U CN 208109307 U CN208109307 U CN 208109307U
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Abstract
The utility model more particularly to a kind of hobboing cutter cutter ring cutter hub mating surface positive pressure force test system.The system adopts instrument, hobboing cutter, eddy current displacement sensor, industrial personal computer, pressure sensor including number, wherein：Groove is locally opened up in the mating surface of the cutter ring and/or cutter hub, so that reserving the spatial joint clearance in the pressure sensitive area for accommodating the pressure sensor in the mating surface；One surface in the pressure sensitive area and a surface of the spatial joint clearance consolidate；Under original steady-state, there are a given small initial perpendicular extrusion deformation degree δ in the pressure sensitive area0；The number, which adopts instrument, to acquire the output signal of the three-dimensional force transducer, pressure sensor and eddy current displacement sensor in real time, and is transmitted to industrial personal computer.The utility model is difficult to carry out the normal pressure in cutter ring cutter hub mating surface the limitation of real time monitoring measurement when solving hobboing cutter rolling broken rock.
Description
Technical field
The utility model belongs to the intersection of complete-section tunnel boring machine technology, signal analysis and processing technology and catalase
Field, is related in a kind of cutter ring of disc cutter cutter hub mating surface that positive pressure force test system more particularly to one kind being capable of real-time monitorings
Disk cutter rolls the test macro of normal pressure in cutter ring cutter hub mating surface in rock break-off process.
Background technique
Since 21 century, with the rapid development of China's economy and the continuous improvement of the level of urbanization, ground can use sky
Between it is fewer and fewer, reinforcement the development and utilization of the underground space are had become in order to which current urbanization necessarily becomes with what urban modernization was built
Gesture.During underground space tunnel excavation, excavation is high-efficient, construction quality is excellent, geology adapts to by it for full face tunnel boring machine
Property equal various features by force, be gradually widely used.Full face tunnel boring machine can be divided into two types again：One kind is tunneling boring rock
Stone rock tunnel(ling) machine (Full Face Rock Tunnel Boring Machine, country's habit are referred to as TBM, similarly hereinafter), it is main
It is used to have the lithostratigraphy of certain self-stable ability to tunnel, tunnels (diversion tunnel, railway tunnel especially suitable for field long tunnel
Road etc.)；Another kind is tunneling boring soft ground tunnelling machine (country's habit is referred to as shield machine, similarly hereinafter), is mainly used for having water
Stratum, weak unstable surrounding rock and there are the city underground engineering of stringent requirement of settlement control or the pick of river-crossing tunnel engineering to earth's surface
Into.All in all, during 13, the market demand of China's full face tunnel boring machine is estimated more than 200, and industrial value is up to
50000000000 yuan.
Disk cutter (hereinafter referred to as hobboing cutter) is core broken rock cutter (its performance direct relation of complete-section tunnel boring machine
Efficiency and engineering safety are excavated to development machine), complete-section tunnel boring machine front end is fixedly installed in by tool apron
At different location on cutterhead.Hobboing cutter is generally made of components such as cutter ring, cutter hub, cutter shaft and bearings, wherein cutter ring passed through
Cooperation of being full of is assembled on cutter hub periphery.When complete-section tunnel boring machine works, hobboing cutter is under powerful cutterhead thrust, meeting
Directly press and wedge scar by cutter ring, and revolves as cutterhead is rotated around cutter head center axis；Meanwhile it also can be around rolling
Knife own axes (hereinafter referred to as hobboing cutter axis) rotation, with lasting rolling fractured rock.Due to full face tunnel boring machine working environment
Extremely severe, knife rock mechanism is extremely complicated in addition, leads to the failure accidents such as cutter ring fatigue fracture, cutter ring heel and toe wear frequency
The life that takes place frequently (such as shows through engineering statistics：In Qinling Tunnel work progress, the cost of cutter consumption just accounts about construction totle drilling cost
30%~40%).Especially in hard rock or ultrahard rock stratum tunneling construction, cutter ring is under the action of periodical cutting stress, and one
As initiated failure crackle is generated from the mating surface with cutter hub, and in complicated cutting stress, interference fit prestressing force (following system
Referred to as assembly prestress) comprehensive function under, crackle occur derivative crosses, cause cutter ring finally generate fatigue fracture failure thing
Therefore.As it can be seen that normal pressure when to hobboing cutter broken rock on cutter ring and cutter hub mating surface carries out testing research, to grasp hobboing cutter rolling broken rock
Normal pressure changing rule characteristic under aforesaid stresses effect on cutter ring and cutter hub mating surface in the process, can help to instruct hobboing cutter
Design of structure type (such as determines optimum interference value), is particularly advantageous for improving hobboing cutter service life under hard-heading man's condition.
Since development machine working environment is extremely severe, sword bed rock stone failure procedure is extremely acute when hobboing cutter rolling broken rock in addition
It is strong, lead to the normal pressure being difficult in direct collecting test hobboing cutter cutter ring-cutter hub mating surface using the prior art.Currently, related rolling
The research report that normal pressure in hobboing cutter cutter ring-cutter hub mating surface is directly or indirectly tested in knife rolling rock break-off process is still rare.
Some documents (containing patent) determined for cutter ring assembly technology problem and cutter ring interference fit parameter, are mostly based on emulation examination
It tests or empirical hypothesis makes.Such as：A kind of disk cutter geological adaptability design method based on CAD/CAE and optimization design
(Chinese patent CN101710349A), with sleeve thickness between cutter ring structural parameters, cutter ring and cutter hub matching allowance and bearing
Deng being used as design variable, establishes disk cutter CAD Parametric Model Library, and use finite element method, obtain meeting and want
The thickness of sleeve between the optimal cutter ring asked and cutter hub matching allowance and bearing；Periodical literature《Luo Binsi boring machine cutter
Assembly technology》(Xue Beifang, engineering machinery, 1987 (12):41-43) describe the experience of the cutter ring magnitude of interference of Luo Binsi hobboing cutter
Value；Academic dissertation《TBM disk cutter pile penetration and Design of Structural parameters research》(Central South University, 2012), at the beginning of theory
Walk determine disk cutter magnitude of interference on the basis of, accurate simulation has been carried out using numerical method, analyze cutter ring cutter hub magnitude of interference,
Affecting laws of three single factor tests of bearing outer ring magnitude of interference and cutter ring thickness to each strength of parts of hobboing cutter assembly；Document《Hobboing cutter
The research of tungsten carbide button's tooth》Describe hobboing cutter stress, cutter hub material, bore tooth and perforation assembly magnitude of interference.It is above-mentioned imitative
True analysis and theoretical hypothesis are urgently subject to reliable authentication by research technique.
In other application field, although there are some reports in relation to contact normal pressure testing scheme, as LED module contacts
Force test device and its detection method (application number：201410520251.2), engine overhead air distribution camshaft contact stress survey
Method for testing (application number：201410110600.3), train wheel-rail contact force wireless detection device (application number：
201210362394.6), the bow net contact force prediction method (application number based on NARX neural network：201110436222.4),
The contact resistance and contact force synchro measure structure and method (application number of MEMS material：201410790613.X), multidimensional contact
Power and real contact area dynamic synchronization test macro and method (application number：201611030857.3) etc., but can not be direct
Or it is applied to this special occasions of hobboing cutter broken rock indirectly.
Summary of the invention
It is existing to overcome the purpose of the utility model is to provide a kind of hobboing cutter cutter ring cutter hub mating surface positive pressure force test system
Means are difficult to test the limitation for obtaining normal pressure size in hobboing cutter broken rock moment cutter ring cutter hub mating surface, can be used for instructing hobboing cutter
Design of structure type (such as determines optimal value of interference fit), is particularly advantageous for improving hobboing cutter under hard-heading man's condition and uses the longevity
Life.
A kind of hobboing cutter cutter ring cutter hub mating surface positive pressure force test system, including hobboing cutter normal line cutting experiment platform, data are adopted
Collection instrument (hereinafter referred to as number adopts instrument), hobboing cutter, eddy current displacement sensor, industrial personal computer, pressure sensor, it is characterised in that：
The hobboing cutter normal line cutting experiment platform include rack, moved cross beam, tool apron, rock material bin, horizontal table,
Vertical Cylinders, longitudinal oil cylinder and cross cylinder；The hobboing cutter includes cutter ring, cutter hub, cutter shaft, bearing and end cap；The hobboing cutter peace
In the tool apron；Three-dimensional force transducer is also equipped between the tool apron and the moved cross beam；
The main feature of disk cutter sword bottom contact force distribution character test macro also resides in：
Groove is locally opened up in the mating surface of the cutter ring and/or cutter hub, so that reserving in the mating surface for accommodating
The spatial joint clearance in the pressure sensitive area of the pressure sensor；One surface in the pressure sensitive area and the one of the spatial joint clearance
Surface consolidation, and another surface in the pressure sensitive area and another surface of the spatial joint clearance fit closely；Incipient stability
Under state (after the i.e. described cutter ring and the normal elastic conjunction of cutter hub, when room temperature does not roll broken rock), there are one in the pressure sensitive area
A given small initial perpendicular extrusion deformation degree δ0；
Line outlet groove is excavated along hobboing cutter axis on the cutter ring and/or cutter hub, to lay the letter of the pressure sensor
Number cable；
Label raised points, the laying position of position and the pressure sensitive area are laid on the side of the customization hobboing cutter
Set one-to-one correspondence and alignment；
The probe of the eddy current displacement sensor is fixedly installed in the tool apron side, and the probe and rotation are extremely
The label raised points at minimum point are to just；
The number adopts instrument can acquire the defeated of the three-dimensional force transducer, pressure sensor and eddy current displacement sensor in real time
Signal out, and it is transmitted to industrial personal computer, to carry out processing analysis.
Preferably, the pressure sensor uses high-temperature resistant membrane formula pressure sensor.
Preferably, the pressure sensor is installed in the hobboing cutter equiangularly spacedly.
Preferably, there are protrusions at the center of groove described in wherein at least one；The spatial joint clearance by it is described protrusion with
It is surrounded jointly between structure feature (groove or protrusion) corresponding thereto.
More preferably, elastic element loop is entered the protrusion；One surface in the pressure sensitive area and the elasticity member
The open end of part fits closely, and another surface in the pressure sensitive area and structure feature (another protrusion table corresponding thereto
The open end of face or groove floor or another elastic element) it fits closely；Under original steady-state, the elastic element
Under the resilient force of generation, so that there are a given small initial perpendicular extrusion deformation degrees in the pressure sensitive area
δ1；The δ0Much larger than δ1。
Preferably, the groove be it is circumferential open up, and the circumferential size feature of the groove is about passing through the hobboing cutter
The intermediate symmetry plane of axis is symmetrical.
Preferably, the elastic element is pressure spring.
Preferably, contact pins are arranged between the elastic element and the pressure sensitive area.
The working principle of hobboing cutter cutter ring cutter hub mating surface positive pressure force test system is：It is described according to linear elastic deformation theory
The vertical extrusion deformation degree δ in pressure sensitive area is (including the initial perpendicular extrusion deformation degree δ under original steady-state0Or δ1, and
Vertical extrusion deformation degree δ under hobboing cutter stress state3) it is proportional to the normal pressure N on the fitting surface, and δ can be passed by pressure
Sensor detected, and export the voltage V of given scale；According to this feature, in conjunction with rating test as a result, can incite somebody to action
The voltage V of the pressure sensor output is converted into normal pressure N.
The utility model is beneficial in that：The utility model provides a kind of hobboing cutter cutter ring cutter hub mating surface normal pressure
Test macro is difficult to carry out the normal pressure in cutter ring cutter hub mating surface real time monitoring measurement when solving hobboing cutter rolling broken rock
Limitation；Test result is accurate and reliable, avoids the strong step breaking feature generated by hobboing cutter sword bottom due to leads to sensor quilt
Rock scrapes the risk of damage；In addition, the related application research achievement of the utility model, also can refer to guide roll knife design of structure type
(such as determining optimum interference value) is particularly advantageous for improving hobboing cutter service life under hard-heading man's condition.
Detailed description of the invention
The utility model patent is further illustrated with reference to the accompanying drawings and examples.
Fig. 1 is the structural schematic diagram of hobboing cutter normal line cutting experiment platform.
Fig. 2 is the structural schematic diagram of standard hob.
Fig. 3 is 17 cun of normal section flat sword hobboing cutter cutter ring blade structure size factor schematic diagrames.
Fig. 4 is the laying pattern 1 of pressure sensor in the utility model specific implementation one.
Fig. 5 is the partial enlarged view in Fig. 4 at I.
Fig. 6 be pressure sensor in the utility model specific implementation one laying pattern 2 at the same position I under part
Enlarged drawing.
Fig. 7 be pressure sensor in the utility model specific implementation one laying pattern 3 at the same position I under part
Enlarged drawing.
Fig. 8 be pressure sensor in the utility model specific implementation one laying pattern 4 at the same position I under part
Enlarged drawing.
Fig. 9 be pressure sensor in the utility model specific implementation one laying pattern 5 at the same position I under part
Enlarged drawing.
Figure 10 be pressure sensor in the utility model specific implementation one laying pattern 6 at the same position I under office
Portion's enlarged drawing.
Figure 11 be pressure sensor in the utility model specific implementation one laying pattern 7 at the same position I under office
Portion's enlarged drawing.
Figure 12 is to pass through to increase elasticity on the basis of laying pattern 5 as shown in Figure 9 in the utility model specific implementation one
The laying pattern 8 formed after element at the same position I under partial enlarged view.
Figure 13 is to pass through to increase elasticity on the basis of laying pattern 6 as shown in Figure 10 in the utility model specific implementation one
The laying pattern 9 formed after element at the same position I under partial enlarged view.
Figure 14 is to pass through to increase elasticity on the basis of laying pattern 7 as shown in figure 11 in the utility model specific implementation one
The laying pattern 10 formed after element at the same position I under partial enlarged view.
Figure 15 is in the utility model specific implementation one by increasing other the possible laying types formed after elastic element
Formula 11 at the same position I under partial enlarged view.
Figure 16 is the three dimensional structure diagram of the groove circumferentially opened up out in cutter hub mating surface.
Figure 17 is hanging down for the variation of t at any time that acquisition obtains when carrying out the test of normal pressure test analysis under hobboing cutter stress state
The voltage letter that straight force signal curve, eddy current displacement sensor output voltage signal curve, three adjacent pressure sensors export
Number curve.
Figure 18 is positive the label raised points position signal of pressure test analysis test equiangularly spaced arrangement when terminating
Figure.
Specific embodiment
Specific implementation one.
The utility model specific implementation one is described in detail now in conjunction with Fig. 1 to Figure 18.
A kind of hobboing cutter cutter ring cutter hub mating surface positive pressure force test system of the utility model, including hobboing cutter standard as shown in Figure 1
Wire cutting experimental bench, number adopt instrument (not shown), hobboing cutter (4), eddy current displacement sensor (only draw it and pop one's head in (10)), industrial personal computer
(not shown), pressure sensor (only drawing the pressure sensitive area (4-8) of pressure sensor into Figure 15 in Fig. 4)；Such as Fig. 1 institute
Show, hobboing cutter normal line cutting experiment platform normally comprises rack (1), moved cross beam (2), tool apron (3), rock material bin (5), water
Flat workbench (6), Vertical Cylinders (7), longitudinal oil cylinder (8) and cross cylinder (14)；In this example, selects in engineering and be widely used
17 cun of normal section flat sword hobboing cutters of certain type standard (using 17 cun of normal section flat sword cutter rings as shown in Figure 3) as research object
(hereinafter referred to as standard hob).It is illustrated in figure 2 the general structure of standard hob, including cutter ring (4-1), cutter hub (4-2), snap ring
(4-3), cutter shaft (4-4), bearing (4-5), seal assembly (4-6) and end cap (4-7).As shown in figure 3,17 cun of the type normal sections are flat
The size factor of angle of throat circle includes：Cutter ring outer diameter R is 216mm；By hot-mounting process, the inner hole table of cutter ring (4-1) as shown in Figure 3
(unnumbered) close contact of the external cylindrical surface of cutter hub (4-2) and interference fit is formed in face (4-1-4) and Fig. 2, contacted with each other
Local surfaces be referred to as the mating surface of cutter ring and the mating surface of cutter hub, hereafter referred to collectively as mating surface；Cutter ring (4-1) it is interior
The basic size R in holeinFor 142mm；Other include transition arc r at blade0For 1.8mm, tool point angle θ0For 6 °, the wide a of blade0For
13mm。
As depicted in figs. 1 and 2, hobboing cutter (4) is mounted in tool apron (3) by cutter shaft (4-4)；Tool apron (3) and moved cross beam
(2) three-dimensional force transducer (9) are also equipped between, to the three-dimensional cutting force that hobboing cutter (4) is subject in real-time measurement cutting process
(vertical force, lateral force and rolling force).
The main feature of the utility model hobboing cutter cutter ring cutter hub mating surface positive pressure force test system also resides in：
As shown in Figures 4 to 7, groove is processed in the mating surface of cutter ring (4-1) and/or cutter hub (4-2), so that cutter ring
Pressure sensitive area (the 4- for accommodating the pressure sensor is reserved after (4-1) and cutter hub (4-2) hot charging in the mating surface
8) spatial joint clearance (41)；One surface in pressure sensitive area (4-8) and a surface of spatial joint clearance (41) consolidate, and pressure sensitive
Another surface in area (4-8) fits closely under assembly prestress effect with another surface of spatial joint clearance (41), and initial steady
Determine under state (i.e. after the normal elastic conjunction of cutter ring (4-1) and cutter hub (4-2), when room temperature does not roll broken rock), pressure sensitive area (4-
8) there are a given small initial perpendicular extrusion deformation degree δ0.Pressure sensitive area (4-8) is in spatial joint clearance (41)
It is specific to lay form, because at least there are following three kinds for the Working position of the groove and processing dimension different：
1, pattern 1 is laid.As shown in Figure 4 and Figure 5, part is opened respectively in the mating surface of cutter ring (4-1) and cutter hub (4-2)
Equipped with groove (4-1-4-3) and groove (4-2-3), and the position of the groove is corresponding, so that cutter ring (4-1) and cutter hub (4-
2) spatial joint clearance (41) for laying the pressure sensor is reserved after assembling in the mating surface；Pressure sensitive area (4-
8) bottom (4-2-2) of lower surface and groove (4-2-3) consolidates, and the upper surface of pressure sensitive area (4-8) is at cutter ring (4-1)
With the bottom (4-1-4-1) after the normal elastic conjunction of cutter hub (4-2) (under assembly prestress effect), with groove (4-1-4-3)
It fits closely or the bottom (4-1-4-1) of the upper surface of pressure sensitive area (4-8) and groove (4-1-4-3) consolidates, and pressure
The lower surface of induction zone (4-8) and the bottom (4-2-2) of groove (4-2-3) fit closely；(i.e. cutter ring under original steady-state
After the normal elastic conjunction of (4-1) and cutter hub (4-2), room temperature and when not rolling broken rock), pressure sensitive area (4-8) there are one to give
Fixed small initial perpendicular extrusion deformation degree δ0。
2, pattern 2 is laid.As shown in fig. 6, only groove (4-2-3) is processed in the mating surface of cutter hub (4-2), so that cutter ring
The spatial joint clearance (41) for laying pressure sensor is reserved after the assembly of (4-1) and cutter hub (4-2) in the mating surface；Other
With laying pattern 1.
3, pattern 3 is laid.As shown in fig. 7, the groove of small size is only processed in the mating surface of cutter ring (4-1), so that knife
The spatial joint clearance (41) for laying pressure sensor is reserved after circle (4-1) and cutter hub (4-2) assembly in the mating surface；Its
He is the same as laying pattern 1.
For the ease of exporting the test signal of the pressure sensor, according to structure and assembly features as shown in Figure 2,
It is excavated out along the axis of cutter shaft as shown in Figure 2 (4-4) (hereinafter referred to as hobboing cutter axis) direction such as Fig. 5 or Fig. 6 institute on cutter hub (4-2)
The wire casing (4-2-1) shown, to lay the signal cable (4-8-1) of pressure sensor；Alternatively, can also be as shown in fig. 7, in knife
It encloses on (4-1) and excavates line outlet groove (4-2-1) along the hobboing cutter axis.
In order to optimize the contact quality of Fig. 4 to Tu7Zhong pressure sensitive area (4-8), preferably, the utility model is specifically real
Shi Yizhong, in addition to locally opening up the groove in the mating surface of cutter ring (4-1) and/or cutter hub (4-2), wherein at least one institute
Stating the center of groove, there are protrusions；Cutter ring (4-1) and cutter hub (4-2) assembly after, in the mating surface by it is described protrusion with
The spatial joint clearance (41) are surrounded jointly between its opposite structure feature (groove or protrusion).Similarly, pressure sensitive area (4-
8) the specific laying form in spatial joint clearance (41), because it is described protrusion open up position, number, size difference at least exist
There are following four kinds of forms：
1, pattern 4 is laid.As shown in figure 8, part offers respectively in the mating surface of cutter ring (4-1) and cutter hub (4-2)
Groove (4-1-4-3) and groove (4-2-3), and the position of two grooves is corresponding；Only there are circles at the center of groove (4-1-4-3)
Column-shaped projection (4-1-4-2)；After cutter ring (4-1) and cutter hub (4-2) assembly, the surface of cylindrical protrusions (4-1-4-2) and groove
(4-2-3) surrounds spatial joint clearance (41) jointly；The lower surface in pressure sensitive area (4-8) and the bottom (4-2-2) of groove (4-2-3)
Consolidation, and the upper surface of pressure sensitive area (4-8) is tight with the surface of cylindrical protrusions (4-1-4-2) under assembly prestress effect
Closely connected conjunction, and under original steady-state, pressure sensitive area (4-8) there are a given small initial perpendicular extrusion deformation degrees
δ0。
2, pattern 5 is laid.As shown in figure 9, the center for the groove (4-2-3) being only located in the mating surface of cutter hub (4-2) is stayed
There is cylindrical protrusions (4-2-3-1)；The upper surface in pressure sensitive area (4-8) and the bottom (4-1-4-1) of groove (4-1-4-3) are solid
Knot.
3, pattern 6 is laid.Unlike Fig. 8, as shown in Figure 10, only part is opened respectively in the mating surface of cutter ring (4-1)
Equipped with groove (4-1-4-3), the surface of cylindrical protrusions (4-1-4-2) and groove (4-1-4-3) lower edge are (with cutter hub (4-2)
Mating surface it is coplanar) surround spatial joint clearance (41) jointly.
4, pattern 7 is laid.Unlike Fig. 8, as shown in figure 11, only part is opened respectively in the mating surface of cutter hub (4-2)
Equipped with groove (4-2-3)；And there are cylindrical protrusions (4-1-4-2) positioned at the center of the mating surface of cutter ring (4-1).
In order to advanced optimize Figure 12 into Figure 15 pressure sensitive area (4-8) contact quality, and rigid contact is become
Flexible contact, so that the risk that pressure sensitive area (4-8) is crushed reduces, in the utility model specific implementation one, aforementioned
On the basis of laying pattern 4~laying pattern 7, by the raised support frame as elastic element, that is, first in space when assembling
The elastic element loop is entered into the protrusion, open end and pressure sensitive area (4-8) of the elastic element in gap (41)
Contact；Under assembly prestress effect, the one side of pressure sensitive area (4-8) and the open end of elastic element are fitted closely, and press
The another side of power induction zone (4-8) and structure feature (another convex surfaces or groove floor or another corresponding thereto
The open end of elastic element) it fits closely；Under original steady-state, under the resilient force that the elastic element generates, so that
There are a given small initial perpendicular extrusion deformation degree δ in the pressure sensitive area (4-8) of pressure sensor1；δ0It is much larger than
δ1.Similarly, the specific laying form of pressure sensitive area (4-8) in spatial joint clearance (41), because it is described protrusion open up position,
Number, at least there are following three kinds for the difference of size：
1, pattern 8 is laid.As shown in figure 12, the support frame by raised (4-2-3-1) as elastic element (4-9)；Elasticity
Element (4-9) is specially spring；When assembly, elastic element (4-9) loop is first entered into protrusion (4-2-3- in spatial joint clearance (41)
1), fit closely the lower end surface of elastic element (4-9) and the bottom (4-2-2) of groove (4-2-3), then in elastic element (4-
9) pressure sensitive area (4-8) is pressed on open end, that is, upper surface.So under assembly prestress effect, pressure sensitive
The lower surface in area (4-8) and the open end of elastic element (4-9) fit closely, and the upper surface of pressure sensitive area (4-8) with
The bottom surface (4-1-4-1) of its opposite groove (4-1-4-3) fits closely；In the resilient force that elastic element (4-9) is generated
Under so that pressure sensitive area (4-8) there are a given small initial perpendicular extrusion deformation degree δ1。
2, pattern 9 is laid.As shown in figure 13, on the basis of laying pattern 6 as shown in Figure 10, by increasing elastic element
(4-9), which can be obtained, lays pattern 9.
3, pattern 10 is laid.As shown in figure 14, on the basis of laying pattern 7 as shown in figure 11, by increasing elasticity member
Part (4-9), which can obtain, lays pattern 10.
It is worth noting that detailed all possible laying pattern can not be described as space is limited, but in aforementioned class
On the basis of laying pattern 1~laying pattern 10, other possible new laying patterns can be formed by slightly changing and combining.
For example, laying pattern 11 as shown in figure 15；For another example, it is locally opened up in cutter ring (4-1) mating surface fluted (referred to as previous recessed
Slot), and there are cylindrical protrusions for previous groove center, using the support frame as elastic element；In the mating surface of cutter hub (4-2) with
It is equally opened up at previous groove relative position fluted (referred to as latter groove), latter bottom portion of groove and pressure sensitive area (4-8)
One side consolidation；Protrusion is inserted in elastic element activity, and the open end of elastic element and the another side of pressure sensitive area (4-8) are tight
Closely connected conjunction.
Preferably, the groove be it is circumferential open up, and the circumferential size feature of the groove is about passing through the hobboing cutter
The intermediate symmetry plane of axis is symmetrical.As shown in figure 16, the groove (4-2- circumferentially to be opened up out in the mating surface of cutter hub (4-2)
3)。
Preferably, the elastic element is pressure spring.
Preferably, contact pins (not shown) is arranged between the elastic element and pressure sensitive area (4-8).
As shown in Figure 1 and Figure 4, in the side of the hobboing cutter, as being laid with label raised points (10) on end cap (4-7), and
Its installation position is corresponded and is aligned with the installation position of pressure sensitive area (4-8)；Marking raised points (10) is irony round shape
Body, carrying magnetic sucker；
As shown in Figure 1, the probe (10) of the eddy current displacement sensor is fixedly installed in tool apron (3) side, and pop one's head in
(10) can with rotation to the label raised points (11) at minimum point to just；At this point, the eddy current displacement sensor can detect
Peak voltage signal, the signal are used for the actual cut revolving speed and pressure sensitive area (4-8) of calculating determination hobboing cutter (4) indirectly
Relative position.
The number adopts instrument can acquire three-dimensional force transducer (9), the pressure sensor and current vortex displacement biography in real time
The output signal of sensor, and it is transmitted to the industrial personal computer, to carry out processing analysis.
It is worth noting that the hobboing cutter used in the utility model hobboing cutter cutter ring cutter hub mating surface positive pressure force test system with
The standard hob there are in partial structurtes difference (such as opening up fluted, raised) and element composition difference (such as joined bullet
Property element, pressure sensor).Preferably, in order to enable the difference is minimum, to reduce to normal pressure in the mating surface point
The influence of cloth feature, while the processing capacity in the mating surface is suitably reduced, to save time and cost, size should be used as far as possible
Diaphragm type (formula containing paillon) pressure sensor of smaller especially pressure sensitive area compact dimensions；In addition, it is contemplated that the standard
(such as by taking 17 cun of hobboing cutters of Wei Erte full face rock tunnel boring machine as an example, when which assembles, cutter ring can be pre- for the hot-mounting process of hobboing cutter
It is first heated to 180~200 DEG C in industrial baking oven, is packed into cutter hub immediately, magnitude of interference is 0.008~0.16mm), in order to avoid
The pressure sensor just fails because of high temperature when hobboing cutter assembles, and recommends to use high-temperature resistant membrane formula pressure sensor.More
Specifically, recommend to use HT201 type Flexiforce high temperature film pressure sensor in the utility model specific implementation one；The type
The operating temperature range of pressure sensor is -9~204 DEG C, and for the linearity up to 1.2%, the diameter in pressure sensitive area is only 9.53mm,
Thickness is only 0.203mm, and highest range is up to 445N；When pressure sensitive area all contacts, footprint pressure is up to
6.24MPa；When pressure sensitive area only 1/5 contact area, footprint pressure reaches as high as 31.2MPa.It can be seen that the type pressure passes
Sensor is compact-sized, and size is very small, and can high temperature resistant, accuracy is high, therefore substantially meets the utility model test request.
Preferably, in order to increase data collection capacity, the pressure sensor is installed on the hobboing cutter equiangularly spacedly
It is interior.As shown in figure 18, when several pressure sensitive areas are evenly mounted in the hobboing cutter by equiangularly spaced Δ θ, accordingly
Ground marks raised points (11), and also interval delta θ is equably arranged on end cap (4-7) at the same angle.
The working principle of hobboing cutter cutter ring cutter hub mating surface positive pressure force test system is：It is described according to linear elastic deformation theory
The vertical extrusion deformation degree δ in pressure sensitive area is (including the initial perpendicular extrusion deformation degree δ under original steady-state0Or δ1, and
Vertical extrusion deformation degree δ under hobboing cutter stress state3) it is proportional to the normal pressure N on the fitting surface, and δ can be passed by pressure
Sensor detected, and export the voltage V of given scale；According to this feature, in conjunction with rating test as a result, can incite somebody to action
The voltage V of the pressure sensor output is converted into normal pressure N.So, can be cooperated using the hobboing cutter cutter ring cutter hub
Face positive pressure force test system real-time monitoring goes out the normal pressure situation of change in the mating surface.It should be added that when neglecting
Slightly manufacture and when rigging error, it is considered that the normal pressure N under original steady-state be it is uniformly distributed, generated by assembly prestress；
And the normal pressure N under hobboing cutter stress state is then generated by cutting stress and assembly prestress superposition, is non-uniformly distributed.
The utility model can test the normal pressure in cutter ring of disc cutter cutter hub mating surface as follows：
Step 1：Test prepares：
Step by step 1.1：(identical material, heat treatment under the premise of guaranteeing to the maximum extent with the standard hob similarity
Technique, outer dimension, assembly technology etc.), only referring to such as Fig. 4 to figure in the mating surface of cutter ring (4-1) and/or cutter hub (4-2)
Any one technical solution (this example scheme preferably as shown in figure 14) shown in 15 carries out small part change design；
Step by step 1.2：On the basis of substep 1.1, manufacture is processed with a series of mating surface tolerance dimension (basic sizes
Identical, only tolerance range position and tolerance values are different) cutter ring (4-1) and cutter hub (4-2)；
Step by step 1.3：Cutter ring (4-1) and cutter hub with a series of value of interference fit are chosen by way of the apolegamy of scene
(4-2)；
Step by step 1.4：By identical hot-mounting process, by selected cutter ring (4-1) and cutter hub (4-2) in dedicated assembly tooling, even
Same elastic element (4-9) and pressure sensitive area (4-8) be assembled into together for rating test a series of hobboing cutters (hereafter referred to collectively as
Demarcate hobboing cutter)；When ignoring manufacture and rigging error, it is considered that only value of interference fit is different for the calibration hobboing cutter；
Step 2：Rating test：
Step by step 2.1：Using means such as theoretical calculation, simulation analysis, predict that the calibration hobboing cutter is matched in the given interference of difference
Normal pressure N under resultant, in the cutter ring cutter hub mating surface of the calibration hobboing cutter.Document (failure of the strong .TB880E cutter of dagger-axe with change
It makes and the assembly of center cutter [J] rock drilling machinery pneumatic tool, 2016 (1):58-61) the given effective interference of minimum of theoretical calculation
Measure ΔminWhen mating surface on normal pressure；Document (Wu Feng .TBM disk cutter pile penetration and Design of Structural parameters research
[D] Central South University, 2012) normal pressure in mating surface is calculated based on magnitude of interference design theory, and limited using large commercial
Meta analysis software Abaqus establishes cutter ring-cutter hub interference fit finite element model, and obtains mating surface under different magnitude of interference
On normal pressure；Using above-mentioned well-known technique, substep 2.1 can be implemented, details are not described herein；
Step by step 2.2：The calibration hobboing cutter is respectively connected to the hobboing cutter cutter ring cutter hub mating surface positive pressure force test system,
Actual measurement obtains the voltage V of the pressure sensor output under hobboing cutter stress state；
Step by step 2.3：Fitting obtains linear fit functional relation of the normal pressure N about the voltage V, shaped like following formula
(1) shown in：
N=f (V) (1)
Step 3：Normal pressure test analysis in the mating surface under hobboing cutter stress state；As shown in Fig. 1 and 18, cutting-in is given
The type of h and rock sample (12) are rolled on the hobboing cutter cutter ring cutter hub mating surface positive pressure force test system using the calibration
Knife carries out rolling broken rock test, three-dimensional force transducer (9), the pressure sensor and the current vortex position during acquisition test
The output signal of displacement sensor；According to the output signal of the pressure sensor and eddy current displacement sensor, in conjunction with step 2
Fitting function relational expression (1) obtained, reverse go out pressure sensor described in any rolling broken rock moment on a mating
The angular position theta of normal pressure N and the pressure sensor.
It in this example, analyzes for ease of calculation, before step 3 beginning, manually the hobboing cutter (4) when rotation zero load, makes
It obtains one of label raised points (11) and is located at extreme lower position as shown in Figure 1, that is, mark raised points (11) and pop one's head in (10)
Just close to simultaneously face.In position as shown in Figure 1, start to test, when hobboing cutter turns over Δ θ counterclockwise, terminates experiment；At this point,
Label raised points (11) when initial with probe (10) face are turning now to D point as shown in figure 18；It is assumed that as shown in figure 17, by a definite date
Between acquisition obtain t at any time variation vertical force signal curve (101), eddy current displacement sensor output voltage signal curve
(301), the voltage signal curve of three adjacent pressure sensor output, i.e. curve (201)~curve (203).Due to current vortex
The strong and weak size of displacement sensor output voltage signal reflects the distance change relationship of probe (10) and label raised points (11),
The voltage signal magnitude of eddy current displacement sensor output at this time is maximum, that is, reaches Vmax as shown in figure 17.Therefore according to this
The interval time and position that working characteristics and eddy current displacement sensor output signal maximum value occur, it can calculate and more connect
The hobboing cutter actual measurement average rotation angular speed of nearly truth can calculate acquisition (0~t3) such as the data and curves according to shown in Figure 17
Average rotation angular velocity omega 1 in this time interval is Δ θ/t3.The angular position theta (similarly hereinafter) at any point is on definition hobboing cutter
Angle (counterclockwise measure) of the line of center of circle O relative to plumb line OA in the point and Figure 18, the then position angle in Figure 18 at D point
For Δ θ, D point and its symmetrically to locate position angle a little about OA be 360 °-Δ θ.Similarly, t2 moment, pressure can be calculated in Figure 17
The angular position theta of induction zone is t2* Δ θ/t3.
Preferably, in order to improve measuring accuracy, step 2 further include it is following step by step：
Step by step 2.4：Calibration hobboing cutter installation is connected to the hobboing cutter cutter ring cutter hub mating surface positive pressure force test system,
Using the test macro to give identical vertical linear load FvRoll fixed steel as shown in Figure 1 repeatedly with given uniform angular velocity
Plate (13), actual measurement obtain the pressure sensitive area and are in different location angle θiThe voltage value of corresponding output when (i=1,2,3 ... n)
Vi, and count and obtain average voltage level Vi.N is determined by the sample frequency of the pressure sensor.When hobboing cutter rolling is horizontal positioned and
When thick steel plate (13) being fixedly secured, each moment shows good consistency, it is however generally that, during which three-dimensional force transducer (9)
The vertical force for surveying acquisition is more gentle, approximate vertical force signal curve (100) as shown in figure 17.
Step by step 2.5：The average voltage level V and formula (1) at the θ of different location angle obtained based on substep 2.4, fitting obtain institute
State pressure sensitive area positive pressure value N on a mating about the voltage value V and pressure sensitive area anchor location
The fitting function relational expression of angular position theta, shaped like shown in following formula (2)：
N=f1(θ,V) (2)
Step by step 2.6：Will the fitting function relational expression (2) that obtain in substep 2.5, carry out shaped like being corrected shown in following formula (3)：
In formula,For the correction value of normal pressure N；κ is correction factor；
Step by step 2.7：Correction factor κ is assigned；Vertical linear load F will be given in substep 2.4vAct on lower different location angle θi(i=
1,2,3 ... n) and θiCorresponding average voltage levelSubstitution formula (3) obtains a series of normal pressure correction values
Step by step 2.8：A series of normal pressure correction values that substep 2.7 is obtainedVertically decomposed with horizontal direction,
And using superposition summation principle, the resultant force for obtaining vertical direction is calculatedWith the resultant force of horizontal direction
Step by step 2.9：According to cutter ring static balance condition, calculates and obtainRelative to FvRelative error Δ1,Relative to
The relative error Δ of zero2；
Step by step 2.10：Gather principle based on circulation examination, correction factor κ assigned to different values, repeat substep 2.7~point
Step 2.10, works as Δ1And Δ2Overall relative error minimum when, corresponding correction factor κ be optimized parameter, again substitute into formula (3)
To replace formula (1).
The utility model is beneficial in that：The utility model provides a kind of hobboing cutter cutter ring cutter hub mating surface normal pressure
Test macro is difficult to carry out the normal pressure in cutter ring cutter hub mating surface real time monitoring measurement when solving hobboing cutter rolling broken rock
Limitation；Test result is accurate and reliable, avoids the strong step breaking feature generated by hobboing cutter sword bottom due to leads to sensor quilt
Rock scrapes the risk of damage；In addition, the related application research achievement of the utility model, also can refer to guide roll knife design of structure type
(such as determining optimum interference value) is particularly advantageous for improving hobboing cutter service life under hard-heading man's condition.
The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not
It is confined to this, anyone skilled in the art is within the technical scope disclosed by the utility model, practical according to this
Novel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model
Within enclosing.
Claims (8)
1. a kind of hobboing cutter cutter ring cutter hub mating surface positive pressure force test system, including the acquisition of hobboing cutter normal line cutting experiment platform, data
Instrument, hobboing cutter, eddy current displacement sensor, industrial personal computer, pressure sensor, it is characterised in that：
The hobboing cutter normal line cutting experiment platform includes rack, moved cross beam, tool apron, rock material bin, horizontal table, vertical
Oil cylinder, longitudinal oil cylinder and cross cylinder；The hobboing cutter includes cutter ring, cutter hub, cutter shaft, bearing and end cap；The hobboing cutter is mounted on
In the tool apron；Three-dimensional force transducer is also equipped between the tool apron and the moved cross beam；
Groove is locally opened up in the mating surface of the cutter ring and/or cutter hub, so that reserving in the mating surface described for accommodating
The spatial joint clearance in the pressure sensitive area of pressure sensor；One surface in the pressure sensitive area and a surface of the spatial joint clearance
Consolidation, and another surface in the pressure sensitive area and another surface of the spatial joint clearance fit closely；In the cutter ring and
After the normal elastic conjunction of cutter hub, when room temperature does not roll broken rock, the pressure sensitive area given small initial hangs down there are one
Straight extrusion deformation degree δ0；
Line outlet groove is excavated along hobboing cutter axis on the cutter ring and/or cutter hub, to lay the signal wire of the pressure sensor
Cable；
Label raised points, one a pair of installation position of position and the pressure sensitive area are laid on the side of the hobboing cutter
It answers and is aligned；
The probe of the eddy current displacement sensor is fixedly installed in the tool apron side, and the probe with rotate to minimum
The label raised points at point are to just；
The data collecting instrument can acquire the defeated of the three-dimensional force transducer, pressure sensor and eddy current displacement sensor in real time
Signal out, and it is transmitted to industrial personal computer, to carry out processing analysis.
2. hobboing cutter cutter ring cutter hub mating surface positive pressure force test system according to claim 1, it is characterised in that：Wherein at least
There are protrusions at the center of one groove；The spatial joint clearance is common between the structure feature by the protrusion and corresponding thereto
It surrounds.
3. hobboing cutter cutter ring cutter hub mating surface positive pressure force test system according to claim 2, it is characterised in that：By elastic member
Part loop enters the protrusion；One surface in the pressure sensitive area and the open end of the elastic element fit closely, and described
Another surface in pressure sensitive area is fitted closely with structure feature corresponding thereto；Under original steady-state, the elastic element
Under the resilient force of generation, so that there are a given small initial perpendicular extrusion deformation degrees in the pressure sensitive area
δ1；The δ0Much larger than δ1。
4. hobboing cutter cutter ring cutter hub mating surface positive pressure force test system according to claim 3, it is characterised in that：The elasticity
Element is pressure spring.
5. hobboing cutter cutter ring cutter hub mating surface positive pressure force test system according to claim 4, it is characterised in that：The elasticity
Contact pins are set between element and the pressure sensitive area.
6. according to claim 1, hobboing cutter cutter ring cutter hub mating surface positive pressure force test system, feature described in 2,3,4 or 5 exist
In：The pressure sensor uses high-temperature resistant membrane formula pressure sensor.
7. according to claim 1, hobboing cutter cutter ring cutter hub mating surface positive pressure force test system, feature described in 2,3,4 or 5 exist
In：The pressure sensor is installed on equiangularly spacedly in the hobboing cutter.
8. according to claim 1, hobboing cutter cutter ring cutter hub mating surface positive pressure force test system, feature described in 2,3,4 or 5 exist
In：The groove is circumferentially to open up, and the circumferential size feature of the groove is about the intermediate symmetry for passing through the hobboing cutter axis
Plane is symmetrical.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108036886A (en) * | 2018-02-08 | 2018-05-15 | 湘潭大学 | A kind of hobboing cutter cutter ring cutter hub mating surface positive pressure force test system and its test method |
| CN110295915A (en) * | 2019-07-02 | 2019-10-01 | 中国科学院武汉岩土力学研究所 | A kind of combined-breaking rock TBM bad ground driving method for realizing three axis force detection |
| CN111636884A (en) * | 2020-05-29 | 2020-09-08 | 江苏马超地下工程设备有限公司 | Shield machine cutter for micro tunnel equipment |
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2018
- 2018-02-08 CN CN201820222803.5U patent/CN208109307U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108036886A (en) * | 2018-02-08 | 2018-05-15 | 湘潭大学 | A kind of hobboing cutter cutter ring cutter hub mating surface positive pressure force test system and its test method |
| CN108036886B (en) * | 2018-02-08 | 2023-11-21 | 中铁山河工程装备股份有限公司 | Positive pressure testing system and method for mating surface of hob ring and hob body |
| CN110295915A (en) * | 2019-07-02 | 2019-10-01 | 中国科学院武汉岩土力学研究所 | A kind of combined-breaking rock TBM bad ground driving method for realizing three axis force detection |
| US11486249B2 (en) | 2019-07-02 | 2022-11-01 | Institute Of Rock And Soil Mechanics, Cas | Combined rock-breaking TBM tunneling method in complex strata for realizing three-way force detection |
| CN111636884A (en) * | 2020-05-29 | 2020-09-08 | 江苏马超地下工程设备有限公司 | Shield machine cutter for micro tunnel equipment |
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