CN102189455B - Grinding device of brake disc and grinding method thereof - Google Patents
Grinding device of brake disc and grinding method thereof Download PDFInfo
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- CN102189455B CN102189455B CN201110034851.4A CN201110034851A CN102189455B CN 102189455 B CN102189455 B CN 102189455B CN 201110034851 A CN201110034851 A CN 201110034851A CN 102189455 B CN102189455 B CN 102189455B
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- 238000000034 method Methods 0.000 title claims abstract description 75
- 230000002093 peripheral effect Effects 0.000 claims abstract description 15
- 238000005299 abrasion Methods 0.000 claims description 101
- 230000008569 process Effects 0.000 claims description 66
- 230000007246 mechanism Effects 0.000 claims description 55
- 238000012360 testing method Methods 0.000 claims description 14
- 230000008520 organization Effects 0.000 claims description 9
- 230000007423 decrease Effects 0.000 claims description 4
- 230000008901 benefit Effects 0.000 abstract description 2
- 239000004575 stone Substances 0.000 description 48
- 238000001514 detection method Methods 0.000 description 15
- 230000008859 change Effects 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 13
- 238000003860 storage Methods 0.000 description 13
- 238000004891 communication Methods 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 10
- 239000003921 oil Substances 0.000 description 10
- 238000005498 polishing Methods 0.000 description 9
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- 238000012545 processing Methods 0.000 description 8
- 230000009471 action Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000003754 machining Methods 0.000 description 5
- 239000010734 process oil Substances 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 238000012856 packing Methods 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 3
- 238000000205 computational method Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000003672 processing method Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000013214 routine measurement Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000007514 turning Methods 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000006061 abrasive grain Substances 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Abstract
The present invention provides a grinding device of a brake disc, and a grinding method for the grinding device, wherein the grinding device has the following advantages: low cost, capability of sufficiently reducing vibration of an end face and capability of realizing minimization of a grinding device, and reduced power consumption. The grinding device (10) comprises the following components: an upper millstone (16); a lower millstone (18); a platform driving motor (48); a supporting component (54) and an operation driving motor (56) which applies a rotation driving force for the supporting component (54). The platform driving motor (48) causes the supporting component (54) to move through a mode that a ground part (58b) of the brake disc (58) contacts with the upper millstone (16) and the lower millstone (18) from an outer peripheral surface and then the ground part (58b) enters between the upper millstone (16) and the lower millstone (18).
Description
Technical field
The present invention relates to a kind of brake disc (brake disc rotor, Block レ mono-キ デ イ ス Network ロ mono-タ) lapping device and Ginding process, particularly relate to lapping device and the Ginding process of the brake disc of the disk brake (disc brake) of the brake apparatus as automobile.
Background technology
In the past, disk brake is used to the device that the rotating shafts such as the axletree of automobile are braked.The structure of this disk brake is, the brake rim (brake pad) being undertaken operating by oil cylinder etc. is clamped and is fixed on the rotary shaft and the two sides of the brake disc rotated along with the rotation of rotating shaft, brake disc is braked, the rotation of axletree is stopped.
When axletree brake disc being arranged on such as automobile uses, brake disc is installed on axletree by installing component.Specifically, as shown in figure 20, first, brake disc 1 bolt 2 is fixed on wheel hub 3.Under the state being installed in the periphery of wheel hub 3 at bearing 4, wheel hub 3 is fixed on the end of axletree 5.The inner ring 4a of bearing 4 is arranged on wheel hub 3, and on inner ring 4a, in coaxial, the outer shroud 4b of configuration is arranged on the vehicle frame 6 of automobile.
Therefore, wheel hub 3 can slide relative to the vehicle frame 6 of automobile, if axletree 5 rotates, so, wheel hub 3 and brake disc 1 just with bearing 4 for benchmark rotate.
As shown in figure 21, in the disk brake of nearest automobile, the bearing 7 with inner ring 7a is assembled in bearing box 7b, and bearing box 7b is installed on vehicle frame 6a.In this disk brake, bearing 7b plays the effect as the outer shroud of bearing 7.
So in disk brake, brake disc 1, along with the rotation of axletree 5, rotates for benchmark with bearing 4,7, by being clamped the brake disc 1 of rotation from two sides by disc type liner (not shown), is braked by axletree 5.
Therefore, when, upon rotating, if produce whirling vibration on brake disc 1, so, brake rim just can not clamp brake disc 1 securely, and brake force declines, and produces abnormal sound, therefore, requires to process brake disc 1 accurately.Specifically, end face vibration (beating) of brake disc 1 must be reduced.Therefore, past, in order to reduce the end face vibration of brake disc 1, use the two sides (for example, referring to Japanese Unexamined Patent Publication 2002-263993 publication, Japanese Unexamined Patent Publication 2004-243488 publication and Japanese Unexamined Patent Publication 49-3180 publication) of the lapping device grinding brake disc 1 of traverse feed mode.
Figure 22 is a routine existing processing method of the brake disc for illustration of the lapping device using traverse feed mode, as shown in Figure 22 (a), in existing processing method, brake disc 1 is being supported by the support unit 8a rotated and under the state of being clamped by fixture (clamper) 8b, is inserting between mano 9a and metate 9b.Then, as shown in Figure 22 (b), mano 9a and metate 9b contacts with brake disc 1 in the mode of clamping brake disc 1, the two sides of grinding brake disc 1.Like this, the size of the end face of brake disc 1 vibration is reduced to about 1/1/2nd ~ tri-compared with vibrating with the end face before attrition process.
In recent years, the Requirement Increases of the brake disc 1 of end face vibration below 10 μm.But, in order to by above-mentioned processing method, by the end face vibration control of brake disc 1 below 10 μm, need in advance by the end face vibration control of the brake disc 1 before attrition process at about 20 ~ 30 μm.In the case, before attrition process, high-precision processing is needed in operation (turnery processing).Therefore, need the function improving turning machine (lathe), and, in order to maintain high-precision turnery processing, need the cutter changing turning machine continually.Like this, the manufacturing cost of brake disc 1 will increase greatly.
In the lapping device of above-mentioned traverse feed mode, grind brake disc 1 in the mode of clamping the two sides of brake disc 1 with mano 9a and metate 9b, therefore, the contact impedance of mano 9a and metate 9b and brake disc 1 increases.In the case, needing large driving force to make mano 9a and metate 9b rotate, therefore, large-scale drive unit must be used.So, be difficult to the miniaturization realizing lapping device, and the power consumption of lapping device increases.
Summary of the invention
Therefore, main purpose of the present invention is, providing a kind of can fully reduce end face vibration by low cost and can realize the miniaturization of lapping device, reduces lapping device and the Ginding process of the brake disc of power consumption.
According to a first aspect of the invention, provide a kind of lapping device of brake disc, this brake disc has the grinding unit that will grind, and the feature of the lapping device of this brake disc is, comprising: the bearing unit of supporting brake disc; Driving mechanism, it applies rotary driving force to bearing unit, and brake disc is rotated; Be configured in the first abrasion site and the mano rotated; Be configured in the second abrasion site of the below of the first abrasion site and the metate of rotation; Contact with above-mentioned mano and above-mentioned metate from its outer peripheral face with according to grinding unit, then the grinding unit mode entered between mano and metate makes the first travel mechanism of bearing unit movement.
According to a further aspect in the invention, a kind of Ginding process of brake disc is provided, it utilizes the mano of rotation and the grinding unit of metate to the brake disc supported by bearing unit to grind, the feature of the Ginding process of brake disc is, comprising: operation brake disc being rotated to bearing unit applying rotary driving force; Mano is configured in the operation of the first abrasion site; Metate is configured in the operation of the second abrasion site of the below of the first abrasion site; Contact with metate with mano from its outer peripheral face with according to grinding unit, then grinding unit enters the mode between mano and metate, makes the operation of bearing unit movement.
In the present invention, the brake disc supported by bearing unit is driven in rotation.In addition, mano is configured in the first abrasion site, and metate is configured in the second abrasion site below mano.In this case, contact with mano and metate from its outer peripheral face according to the grinding unit of brake disc, then grinding unit enters the mode between mano and metate, is moved by bearing unit.That is, in the present invention, the grinding unit of brake disc is ground towards inner circumferential side from side, periphery gradually by mano and metate.In the case, can prevent from applying power from mano and metate to grinding unit through-thickness.Like this, can prevent from producing bending stress at brake disc, therefore, it is possible to reduce the end face vibration of brake disc fully.Its result, does not need high-precision processing in operation (turnery processing), can reduce the manufacturing cost of brake disc before attrition process.In addition, grinding unit is little by little ground from side, periphery by mano and metate, therefore, it is possible to prevent from producing large contact impedance between mano and grinding unit and between metate and grinding unit.Like this, can reduce make mano and metate rotate needed for driving force, therefore, it is possible to be configured for more low price the parts (hereinafter referred to as grinding stone driving mechanism) driving mano and metate.In addition, in order to rotate mano and metate does not need large driving force, therefore, it is possible to realize the miniaturization of grinding stone driving mechanism.Its result, can not only realize the miniaturization of lapping device, and can reduce the power consumption of lapping device.In addition, mano and the contact impedance between metate and brake disc are minimized, therefore, it is possible to be reduced in the power (clamping force) of bearing unit fixing needed for brake disc.Like this, the distortion of brake disc itself can be prevented fully.Its result, can reduce the end face vibration of brake disc fully.
As previously discussed, according to the present invention, can obtain a kind of can low cost and reduce end face vibration fully and the miniaturization of lapping device can be realized, reduce lapping device and the Ginding process of the brake disc of power consumption.
The lapping device of brake disc preferably also comprises: make the second travel mechanism that mano is retreated relative to the upper surface of grinding unit; Make the 3rd travel mechanism that metate is retreated relative to the lower surface of grinding unit; Testing agency, it detects mano and the first contact position of upper surface and the second contact position of metate and lower surface; With the controlling organization of control second travel mechanism and the 3rd travel mechanism, wherein, driving mechanism comprises motor, testing agency is based on the current value of motor, detect the first contact position and the second contact position, controlling organization, by controlling the second travel mechanism and the 3rd travel mechanism before the attrition process of grinding unit, mano is contacted with upper surface, and metate is contacted with lower surface, based on the first contact position detected by testing agency and the second contact position, calculate the first abrasion site and the second abrasion site.
In the case, based on the current value of motor, testing agency can be utilized to detect mano and first contact position of upper surface of grinding unit and the second contact position of the lower surface of metate and grinding unit.Therefore, without the need to arranging the testing agency for detecting the first contact position and the testing agency for detecting the second contact position in addition, therefore, it is possible to reduce the manufacturing cost of lapping device.In addition, the testing agency shared is utilized to detect the current value of motor, so just can with identical sensitivity, the change of the current value when change of current value when detection mano contacts with grinding unit and metate contact with grinding unit.In the case, can prevent, in the grinding degree of depth of the part that the upper surface of grinding unit is ground by mano to the first contact position is detected, and produce difference between the grinding degree of depth of the part of being ground by metate to the second contact position is detected at the lower surface of grinding unit.Like this, can prevent the centre position of the first contact position and the second contact position from significantly offseting from the center of the thickness direction of grinding unit.Therefore, it is possible to the centre position of the second abrasion site preventing the first abrasion site of calculating based on the first contact position and calculate based on the second contact position significantly offsets from the center of the thickness direction of grinding unit.That is, can easily make the center of the thickness direction of the grinding unit after attrition process close to desirable position (position in design).Its result, can improve the dimensional accuracy of brake disc.Usually, the electric capacity for the motor driven brake disc is little, and therefore, when mano or metate contact with brake disc is roughly micro-, the current value of motor also changes rapidly.Therefore, by detecting the current value be used for the motor that brake disc drives, the first contact position and the second contact position can be detected correctly and rapidly.
In addition, also can measure the end face vibration of the upper surface of the grinding unit before attrition process in advance, the position of this end face vibratory output lower than the first contact position is calculated as the first abrasion site.In the case, the end face vibration of the upper surface of grinding unit can reliably be reduced.Equally, also can measure the end face vibration of the lower surface of the grinding unit before attrition process in advance, the position exceeding this end face vibratory output than the second contact position is calculated as the second abrasion site.In the case, the end face vibration of the lower surface of grinding unit can reliably be reduced.
Controlling organization is preferred, after calculating the first abrasion site and the second abrasion site, by controlling the second travel mechanism and the 3rd travel mechanism, mano and metate is made to move to the first abrasion site and the second abrasion site respectively, by controlling the first travel mechanism, contact with the metate of the second abrasion site with the mano of the first abrasion site from outer peripheral face according to grinding unit, then grinding unit enters the mode between mano and metate, and bearing unit is moved.In this lapping device, controlling organization carries out for making mano to the control of the second travel mechanism of the first abrasion site movement; Make metate to the control of the 3rd travel mechanism of the second abrasion site movement; And the control of the first travel mechanism for the attrition process of implementing grinding unit.That is, in this lapping device, the attrition process of grinding unit is automatically implemented according to the first calculated abrasion site and the second abrasion site.In the case, when the continuous multiple brake disc of process, operator is without the need to setting the first abrasion site and the second abrasion site to implement attrition process to each brake disc, therefore, operating efficiency improves.
Bearing unit preferably includes: the rotating part rotated by above-mentioned driving mechanism; Fixture, it is for being fixed on above-mentioned rotating part by above-mentioned brake disc, and this fixture is arranged on above-mentioned brake disc; And pull bar, it is arranged in above-mentioned rotating part, can retreat along the vertical direction, and can be locked to above-mentioned fixture.In this lapping device, pull bar can be made to be locked to fixture, to utilize pull bar to be drawn by fixture downwards.Like this, brake disc is given as security downwards by fixture, and brake disc is fixed on rotating part.In the case, without the need to arranging the device for fixing brake disc on rotating part on fixture.Like this, the space above fixture can be used as the space of carrying out operating, therefore, operating efficiency improves.In addition, due to the structure of lapping device can be simplified, therefore, it is possible to reduce the manufacturing cost of lapping device.
First travel mechanism preferably includes: the holding unit kept in the mode that can rotate by bearing unit; With the adjustment part for carrying out horizontal adjustment to holding unit.In the case, even if the rotating shaft of brake disc tilts when changing the parts of lapping device etc., by carrying out the horizontal adjustment of holding unit, the inclination of the rotating shaft of brake disc can also easily be corrected.Like this, the maintenance of lapping device becomes easy.In addition, when the machining accuracy of holding unit is low, by carrying out the horizontal adjustment of holding unit, the horizontal adjustment of brake disc can be carried out.Like this, when the holding unit using machining accuracy low, also can carry out high-precision attrition process, therefore, holding unit need not be processed accurately.Its result, can reduce the manufacturing cost of lapping device.
By the detailed description of following embodiments of the present invention carried out with reference to the accompanying drawings, above-mentioned purpose of the present invention and other object, feature, aspect and advantage will be more readily apparent from clear.
Accompanying drawing explanation
Fig. 1 represents the lapping device of the brake disc of embodiments of the present invention.
Fig. 1 (a) is plane, and Fig. 1 (b) is side view.
Fig. 2 is the enlarged drawing representing mano and metate.
Fig. 3 represents that brake disc is fixed on the figure of the state on support unit.
Fig. 4 is the sectional view of the A-A line along Fig. 3.
Fig. 5 represents the state making pull bar (draw bar) 90-degree rotation under the state of fig. 4.
Fig. 6 is the block diagram of the control system of the lapping device representing embodiments of the present invention.
Fig. 7 is the flow chart of the control action representing operational part.
Fig. 8 represents that grinding starts the figure of the action of front mano, metate and brake disc.
Fig. 9 is the figure of the action of mano when representing attrition process, metate and brake disc.
Figure 10 is the figure representing the state of grinding mano, metate and brake disc before starting.
Figure 11 is the figure of the state of the end face vibration of brake disc before representing attrition process.
Figure 12 is the figure of the relation that the end face vibration of the upper surface of grinding unit before representing attrition process and the end face of lower surface vibrate.
Figure 13 is the figure of the state represented when using the lapping device of existing traverse feed mode to grind brake disc.
Figure 14 is the figure of the state represented when using the lapping device of embodiments of the present invention to grind brake disc.
Figure 15 (a) is the curve map of the change of the current value of the grinding stone drive motors representing comparative example,
Figure 15 (b) is the curve map of the change of the current value of the grinding stone drive motors representing embodiment.
Figure 16 is the figure of the lapping device of the brake disc representing other embodiments of the present invention, Figure 16 (a) is plane, its side view of Figure 16 (b).
Figure 17 is the side view of the lapping device of the lower surface of the linking part representing holding unit when tilting relative to upper surface.
Figure 18 is the plane of the lapping device of the brake disc representing other embodiments of the present invention.
Figure 19 is the plane of the lapping device of the brake disc representing another other embodiments of the present invention.
Figure 20 represents that brake disc is installed in the sectional view of the using state on axletree.
Figure 21 is the sectional view representing another other using state.
Figure 22 is the sectional view representing prior art, and Figure 22 (a) represents the state before attrition process, and Figure 22 (b) represents state during attrition process.
Description of reference numerals
10,10a, 10b, 10c lapping device
12 cylinders
16 manos
18 metates
20,22 mill spindles
28,30 grinding stone drive motors
32,34 grinding stone cut-in devices
36 base stations
38 adjustment plates
48 drive motors
50 rotary screws
52,53,93,98 holding units
54 support units
56 task driven motors
58 brake discs
58b grinding unit
58d upper surface
58e lower surface
60 fixtures
66 pull bars
84 ECU
94 turntables
96 electric rotating machines
P1, P2 abrasion site
Detailed description of the invention
Below, with reference to accompanying drawing, the lapping device of the brake disc of embodiments of the present invention is described.With reference to Fig. 1, the lapping device 10 of the brake disc of one embodiment of the present invention is vertical two flat tool, comprises side and sees cylinder 12 roughly in U-shaped.In the recess 14 of cylinder 12, the mano 16 of grinding brake disc 58 (aftermentioned) and metate 18 are arranged opposite at coaxially with interval.As shown in Figure 2, mano 16 comprises: discoideus substrate 16a and multiple (being 18 in the present embodiment) polishing slate (segment) 16b equally spaced arranged at the outer peripheral face of substrate 16a.Metate 18 comprises: discoideus substrate 18a and multiple (being 18 in the present embodiment) the polishing slate 18b equally spaced arranged at the outer peripheral face of substrate 18a.The material of polishing slate 16b and polishing slate 18b such as can use CBN (cubic boron nitride) abrasive particle or diamond abrasive grain.
As shown in Figure 1, mano 16 and metate 18 are supported by mill spindle 20,22 in the mode that can rotate respectively.Mill spindle 20,22 is respectively by band 24,26 and grinding stone drive motors 28,30 interlock.Therefore, the rotary driving force of grinding stone drive motors 28,30 passes to mill spindle 20,22 by band 24,26, and like this, mano 16 and metate 18 are driven in rotation.That is, in lapping device 10, grinding stone drive motors 28 plays function as driving the grinding stone driving mechanism of mano 16, and grinding stone drive motors 30 plays function as driving the grinding stone driving mechanism of metate 18.Mill spindle 20,22 arranges grinding stone cut-in device 32,34 respectively.Grinding stone cut-in device 32,34 such as comprises motor.Mill spindle 20,22 is retreated in axial direction based on the driving force of grinding stone cut-in device 32,34.So mano 16 and metate 18 are retreated relative to the grinding unit 58b (with reference to Fig. 3 described later) of brake disc 58.
Be provided with base station 36 in the position adjacent with cylinder 12, base station 36 arranges adjustment plate 38.Adjustment plate 38 is installed on base station 36 by multiple (being 3 in the present embodiment) adjustment part 40.Adjustment part 40 comprises adjustment screw 40a and clamping screw 40b.The roughly cylindrical shape of adjustment screw 40a, end has flange part 40c thereon.Adjustment screw 40a screws togather with adjustment plate 38 on base station 36.Clamping screw (lock bolt) 40b inserts adjustment screw 40a, and screws togather with base station 36.Between the flange part 40c and the head of clamping screw 40b of adjustment screw 40a, be provided with packing ring not shown in the figures, adjustment screw 40a presses downwards across this packing ring bolt 40b that is locked.Like this, adjust screw 40a to be restricted in the movement of above-below direction.
Adjustment screw 40a is arranged in the mode that can rotate relative to clamping screw 40b, by making adjustment screw 40a rotate, the part screwed togather with adjustment screw 40a in adjustment plate 38 can be made to move up and down.Therefore, make three to adjust screw 40a selectively and rotate, the horizontal adjustment adjusting plate 38 can be carried out.
Adjustment plate 38 arranges pair of tracks 42 abreast, pair of tracks 42 arranges sliding stand 44.Sliding stand 44 has the roller 46 rotated on track 42, can move along track 42 to arrow X-direction.In addition, platform drive motors 48 is fixed on adjustment plate 38.One end of bar-shaped rotary screw 50 is fixed on the rotating shaft (not shown) of platform drive motors 48.Another side and the sliding stand 44 of rotary screw 50 screw togather.Under the effect of the rotary driving force of platform drive motors 48, rotary screw 50 rotates, and sliding stand 44 moves to arrow X-direction.
With reference to Fig. 1 (b), sliding stand 44 arranges holding unit 52.Holding unit 52 comprises: the maintaining part 52b in inside with the tubular of bearing 52a; With linking part 52c when having and overlook being roughly OBL tabular.Maintaining part 52b is fixed on the upper surface of linking part 52c.Linking part 52c is such as directly fixed on sliding stand 44 by retainer (such as bolt etc.) not shown in the figures.In the present embodiment, sliding stand 44, platform drive motors 48, rotary screw 50 and holding unit 52 are included in the first travel mechanism Tr.
Holding unit 52 arranges the support unit 54 of the rotating shaft 54a (with reference to Fig. 3) with tubular.Rotating shaft 54a is kept by bearing 52a (holding unit 52) in the mode that can rotate.Be linked with electrodynamic type task driven motor 56 at rotating shaft 54a, under the effect of the rotary driving force of task driven motor 56, rotating shaft 54a (support unit 54) rotates.In addition, in order to simplify accompanying drawing, do not represent in FIG, but in task driven motor 56, be provided with the current detecting part 86 (with reference to Fig. 6 described later) of the value for detecting the electric current flowing through task driven motor 56.Current detecting part 86 can use various current sensor.
Brake disc 58 uses fixture 60 to be fixed on support unit 54.The A-A line sectional view of Fig. 3 to be the partial cross section figure representing support unit 54, brake disc 58 and fixture 60, Fig. 4 be Fig. 3.In FIG, in order to simplify accompanying drawing, the clamping device 62 shown in Fig. 3 and Fig. 4, component (mating member) 64, pull bar (draw bar) 66, oil cylinder 68 and oil cylinder 74 do not represent in the drawings.
As shown in Figure 3, brake disc 58 is supported by the clamping device 62 supported portion part 54 that hollow is discoideus.In the present embodiment, support unit 54 and clamping device 62 are included in rotating part M.Clamping device 62 is arranged there is the discoideus component 64 of the hollow of the external diameter less than clamping device 62.The axle center of support unit 54, clamping device 62 and component 64 is roughly consistent.Component 64 is inserted through in the hole 58a at the center of brake disc 58.Like this, the axle center of brake disc 58 and the axle center of support unit 54 roughly consistent.In addition, other parts of Thickness Ratio of the peripheral part 58b of brake disc 58 are thick.In brake disc 58, peripheral part 58b is the grinding unit should ground by mano 16 (with reference to Fig. 2) and metate 18 (with reference to Fig. 2).Below, the peripheral part 58b of brake disc 58 is called grinding unit 58b.
Pull bar 66 and oil cylinder 68 are set in support unit 54.The fastener 66b that pull bar 66 comprises axle portion 66a and arranges in the upper end of axle portion 66a, according to can rotating and can (axis) retreats along the vertical direction mode arranging.Axle portion 66a is inserted through in the rotating shaft 54a of support unit 54.Axle portion 66a is provided with gear grooved (pinion (pinion gear)) 70.In the present embodiment, support unit 54, fixture 60, clamping device 62 and pull bar 66 are included in bearing unit N.Also with reference to Fig. 4, rack pinion (rack gear) 72 is installed in oil cylinder 68.Rack pinion 72 is arranged according to the mode extended along the direction vertical with axle portion 66a, based on oil cylinder 68 driving force and retreat.Rack pinion 72 is engaged with the gear grooved 70 (with reference to Fig. 3) of axle portion 66a, and retreated by rack pinion 72, pull bar 66 pivots.With reference to Fig. 4, the roughly rectangular shape roughly in broad warp when holding section 66b overlooks.With reference to Fig. 3, in the lower end of axle portion 66a, oil cylinder 74 is installed.Axle portion 66a is based on driving force (axis) advance and retreat along the vertical direction of oil cylinder 74.Oil cylinder 68,74 is such as connected with controller not shown in the figures, and operator can make oil cylinder 68,74 work by operation control.
Fixture 60 has the inner space 76,78 of substantial cylindrical shape.Inner space 78 is at lower surface one side opening of fixture 60, and inner space 76 is formed in the upside of inner space 78 in fixture 60.With reference to Fig. 3 and Fig. 4, between inner space 76 and inner space 78, be provided with a counter septum (dividing plate) 80.The communication paths 82 that inner space 76 is communicated with inner space 78 is formed between next door 80 and next door 80.
With reference to Fig. 4, it is the roughly rectangular shape of minor face broad warp that communication paths 82 has when overlooking.When overlooking, the width of communication paths 82 is shorter than the length on the long limit of fastener 66b.Therefore, when overlooking, when the long limit of fastener 66b and the long limit of communication paths 82 roughly orthogonal, fastener 66b (pull bar 66) movement is downwards stoped by next door 80.With reference to Fig. 5, when overlooking, the length on the long limit of communication paths 82 is longer than the length on the long limit of fastener 66b.The width of communication paths 82 is wider than the width of fastener 66b.Therefore, when overlooking, when the long limit of fastener 66b and the long limit of communication paths 82 almost parallel, fastener 66b can by communication paths 82.That is, pull bar 66 (fastener 66b) can move downwards.
With reference to Fig. 3, when when the upper fixing brake disc 58 of support unit 54 (clamping device 62), first operator is inserted through the mode in the 58a of hole with component 64, and clamping device 62 loads brake disc 58.Then, process oil air cylinder 74, makes pull bar 66 rise.Specifically, make pull bar 66 increase, with the top making fastener 66b be positioned at the position (position that fastener 66b contacts with next door 80) shown in Fig. 3.Then, with reference to Fig. 5, to make fastener 66b enter the mode of inner space 76 by communication paths 82, brake disc 58 loads fixture 60.Then, with reference to Fig. 4, by process oil air cylinder 68, rotating rod 66, to make the long limit of fastener 66b and the long limit of communication paths 82 when overlooking roughly orthogonal.Then, with reference to Fig. 3, by process oil air cylinder 74, pull bar 66 is declined, make the lower surface of fastener 66b be locked on the upper surface in next door 80.Like this, fixture 60 is pulled to below by pull bar 66, and brake disc 58 is pressed downwards by fixture 60.Its result, brake disc 58 is fixed on support unit 54 (clamping device 62).
On the other hand, when pulling down brake disc 58 from support unit 54, first, operator's process oil air cylinder 74, makes pull bar 66 rise.Then, process oil air cylinder 68, as shown in Figure 5, during to overlook, the almost parallel mode in the long limit of fastener 66b and the long limit of communication paths 82 makes pull bar 66 rotate.Then, to make fastener 66b by the mode of communication paths 82, lift fixture 60 upward, pull down fixture 60 from brake disc 58.Like this, brake disc 58 can be pulled down.
With reference to Fig. 1 (a), cylinder 12 is provided with ECU (electronic-controlled installation) 84.Comprise with reference to Fig. 6, ECU84: detection unit 88; Storage part 90 and operational part 92.Detection unit 88 and operational part 92 are such as realized by CPU (central operation processor) and program.Storage part 90 such as comprises RAM (random access storage device) and ROM (read-only storage), for storing various data, and plays function as the working region of operational part 92.In addition, part or all of detection unit 88 or operational part 92 also can be realized by hardware such as circuit.
Grinding stone drive motors 28,30, grinding stone cut-in device 32,34, platform drive motors 48 and task driven motor 56 be electrically connected with operational part 92, current detecting part 86 is electrically connected with the detection unit 88 of ECU84.Grinding stone drive motors 28,30, grinding stone cut-in device 32,34, platform drive motors 48 and task driven motor 56 controlled by operational part 92.Below, the control action of operational part 92 is described.
Fig. 7 ~ Figure 10 is for illustration of the control action of operational part 92.With reference to Fig. 1, Fig. 6 and Fig. 7, when starting to grind brake disc 58, first operational part 92 by making task driven motor 56 start, makes brake disc 58 rotate (step S1).The rotary speed preferably such as 100rpm ~ 500rpm of brake disc 58.
Then, also with reference to Fig. 8 (a), operational part 92 starts by making platform drive motors 48, makes the grinding unit 58b of brake disc 58 enter (step S2) between mano 16 and metate 18.Now, the interval G1 (with reference to Fig. 8 (a)) of mano 16 and metate 18 is larger than the thickness of grinding unit 58b.
Then, also with reference to Fig. 8 (b), operational part 92 starts by making grinding stone drive motors 28 and grinding stone cut-in device 32, mano 16 is rotated and decline (step S3).Then, operational part 92 judges whether detection unit 88 detects the contact position (step S4) of mano 16 and grinding unit 58b.Herein, in lapping device 10, utilize because of mano 16 and the contact impedance of grinding unit 58b and the current value rising this point of task driven motor 56, detect the contact position of mano 16 and grinding unit 58b.Specifically, first, current detecting part 86 detects the current value of task driven motor 56, provides the signal corresponding to detected current value to detection unit 88.Then, detection unit 88, based on the signal provided by current detecting part 86, judges whether the current value of task driven motor 56 exceedes the first threshold of regulation.To set forth first threshold later.When current value exceedes first threshold, detection unit 88 judges that mano 16 contacts with grinding unit 58b, according to the position (highly) of now mano 16, makes marks in the storage area of the regulation of storage part 90.So the contact position of mano 16 and grinding unit 58b is just judged to bonding part 88 and detects.When making marks in the storage area of the regulation of storage part 90, operational part 92 judges that the contact position of mano 16 and grinding unit 58b is detected.
In step s 4 which, when the contact position of mano 16 and grinding unit 58b is not detected, operational part 92 makes mano 16 decline, until the contact position of mano 16 and grinding unit 58b is detected.
Also with reference to Fig. 8 (c), in step s 4 which, when the contact position of mano 16 and grinding unit 58b is detected, operational part 92 controls grinding stone cut-in device 32, makes mano 16 return initial position (step S5).
Then, also with reference to Figure 10, operational part 92 based in step s 4 which detected come mano 16 and the contact position of grinding unit 58b, calculate the abrasion site P1 that mano 16 grinds grinding unit 58b, and calculated abrasion site P1 be stored in (step S6) in storage part 90.In addition, abrasion site P1 is at least calculated by the position of the below of the upper surface 58d as grinding unit 58b.Later the computational methods of abrasion site P1 will be set forth.
Below, also with reference to Fig. 8 (d), operational part 92 starts by making grinding stone drive motors 30 and grinding stone cut-in device 34, metate 18 is rotated and rise (step S7).Then, operational part 92 judges whether the contact position of metate 18 and grinding unit 58b is judged to bonding part 88 and detects (step S8).Metate 18 is detected according to the method identical with the detection method of the contact position of grinding unit 58b with above-mentioned mano 16 with the contact position of grinding unit 58b.That is, based on the current value of the detected next task driven motor 56 of current detecting part 86, the contact position of metate 18 and grinding unit 58b is judged to bonding part 88 and detects.In above-mentioned steps S4, in order to detect that the contact position of mano 16 and grinding unit 58b uses first threshold, and in step s 8, in order to detect that the contact position of metate 18 and grinding unit 58b uses Second Threshold.To set forth Second Threshold later.
In step s 8, when the contact position of metate 18 and grinding unit 58b is not detected, operational part 92 makes metate 18 rise, until the contact position of metate 18 and grinding unit 58b is detected.
Also with reference to Fig. 8 (e), in step s 8, when the contact position of metate 18 and grinding unit 58b is detected, operational part 92 controls grinding stone cut-in device 34, makes metate 18 turn back to initial position (step S9).
Below, also with reference to Figure 10, operational part 92 based in step s 8 detected come metate 18 and the contact position of grinding unit 58b, calculate the abrasion site P2 that metate 18 grinds grinding unit 58b, and calculated abrasion site P2 is stored in (step S10) in storage part 90.In addition, abrasion site P2 is at least calculated by the position of the top of the lower surface 58e as grinding unit 58b.Later the computational methods of abrasion site P2 will be set forth.
Then, also with reference to Fig. 8 (f), operational part 92 console drive motors 48, makes brake disc 58 retreat (step S11).Specifically, brake disc 58 is retreated, to make the outside in the space of grinding unit 58b between mano 16 and metate 18.
Below, also with reference to Fig. 9 (a) and Figure 10, operational part 92, by controlling grinding stone cut-in device 32,34, makes mano 16 and metate 18 move to abrasion site P1, P2 (step S 12) respectively.Now, mano 16 and metate 18 rotate.In addition, the interval G2 (with reference to Figure 10) between abrasion site P1 and abrasion site P2 is less than the thickness of the grinding unit 58b of brake disc 58.
Below, also with reference to Fig. 9 (b) ~ Fig. 9 (d), operational part 92 console drive motors 48, makes the grinding unit 58b of brake disc 58 enter (step S13) between mano 16 and metate 18.Now, brake disc 58 rotates.In step s 13, as shown in Fig. 9 (b), first operational part 92 makes brake disc 58 advance to mano 16 and metate 18 side, contacts with the polishing slate 18b (with reference to Fig. 2) of the polishing slate 16b of the outer peripheral face 58c with mano 16 that make grinding unit 58b (with reference to Fig. 2) and metate 18.Then, as shown in Fig. 9 (c), (d), operational part 92 makes grinding unit 58b enter between mano 16 and metate 18.Then, the grinding of the operational part 92 upper surface 58d and lower surface 58e that make brake disc 58 the advance to grinding unit 58b position of terminating.The position (position of the advance stopping of brake disc 58) that the grinding of grinding unit 58b terminates is pre-stored in storage part 90.
Then, also with reference to Fig. 9 (e), operational part 92, by controlling grinding stone cut-in device 32,34, makes mano 16 and metate 18 be back to initial position (step S14).Finally, also with reference to Fig. 9 (f), operational part 92 console drive motors 48, makes brake disc 58 be back to initial position (step S15).Like this, the attrition process of lapping device 10 pairs of brake discs 58 terminates.Then, change the brake disc 58 after attrition process and other brake discs before attrition process, repeat the process of above-mentioned steps S1 to step S15.
Herein, the computational methods of abrasion site P1, P2 in above-mentioned steps S6 and step S10 are described.
Figure 11 and Figure 12 represents a routine state of the end face vibration of the brake disc 58 before attrition process.Figure 11 represents in grinding unit 58b, when making brake disc 58 revolve to turn around by the state of the part of the position shown in the B-B line of Fig. 4.Figure 12 represents the track (height change of above-below direction) when making brake disc 58 revolve to turn around by the track (height change of above-below direction) of the outer rim b1 (with reference to Figure 11) of the upper surface 58d (with reference to Figure 11) of the position shown in the B-B line of Fig. 4 and the outer rim b2 (with reference to Figure 11) of lower surface 58e (with reference to Figure 11).In addition, in Figure 11 and Figure 12, represent the center of the thickness direction of grinding unit 58b with dotted line C1.
With reference to Figure 11 and Figure 12, brake disc 58 before attrition process has end face vibration S1, S2 (with reference to Figure 12) respectively at upper surface 58d (with reference to Figure 11) and lower surface 58e (with reference to Figure 11), is roughly sine curve by the outer rim b1 of B-B line of Fig. 4, the track of the one-period of b2.With reference to Figure 12, in above-mentioned steps S3, when making mano 16 decline, when mano 16 drops to position P3 mutually level with the maximum height of the outer rim b1 of upper surface 58d, first contact upper surface 58d (outer rim b1).Herein, the current value flowing through task driven motor 56 when the first threshold used in above-mentioned steps S4 is ground degree of depth d1 with upper surface 58d (outer rim b1) by mano 16 from the P3 of position is equal.Therefore, in above-mentioned steps S4, when the grinding degree of depth that mano 16 grinds upper surface 58d exceedes degree of depth d1, the current value of task driven motor 56 exceedes first threshold, and the contact position of mano 16 and grinding unit 58b (upper surface 58d) is judged to bonding part 88 and detects.Therefore, detection unit 88 has detected the position P4 of degree of depth d1 lower than position P3 in the vertical direction, it can be used as the contact position of mano 16 and grinding unit 58b (upper surface 58d).First threshold preference is as being that the mode of 20 μm ~ 30 μm sets according to degree of depth d1.Then, degree of depth d1 and degree of depth d2 is added by operational part 92, thus calculates abrasion site P1.Degree of depth d2 is pre-stored in storage part 90.Degree of depth d2 is such as positioned at the mode of the position below it according to abrasion site P1 and sets compared with the upper surface 58d of the grinding unit 58b before attrition process.Such as, also can measure the end face vibration S1 of the upper surface 58d before attrition process in advance, measured end face vibration S1 is set as degree of depth d2.That is, also the position that end face at least low compared with contact position P4 vibrates S1 can be calculated as abrasion site P1.In the case, the end face vibration of upper surface 58d can reliably be reduced.
With reference to Figure 12, in above-mentioned steps S7, when making metate 18 rise, when rising to the position P5 of the height identical with the minimum altitude of the outer rim b2 of lower surface 58e, first metate 18 contacts with lower surface 58e (outer rim b2).Herein, the Second Threshold used in above-mentioned steps S8 is equal with the current value flowing through task driven motor 56 when lower surface 58e (outer rim b2) has been ground degree of depth d4 by metate 18 from the P5 of position.Therefore, in above-mentioned steps S8, when the grinding degree of depth that metate 18 grinds lower surface 58e exceedes degree of depth d4, the current value of task driven motor 56 exceedes Second Threshold, and the contact position of metate 18 and grinding unit 58b (lower surface 58e) is judged to bonding part 88 and detects.Therefore, detection unit 88 detects the position P6 exceeding degree of depth d4 in the vertical direction than position P5, it can be used as the contact position of metate 18 and grinding unit 58b (lower surface 58e).Second Threshold preference is as being that the mode of 20 μm ~ 30 μm sets according to degree of depth d4.Then, operational part 92, by being added by degree of depth d4 and degree of depth d5, calculates abrasion site P2.Degree of depth d5 is pre-stored in storage part 90.Degree of depth d5 is such as located thereon the mode of putting in orientation according to abrasion site P2 and sets compared with the lower surface 58e of the grinding unit 58b before attrition process.Such as, also can measure the end face vibration S2 of the lower surface 58e before attrition process in advance, measured end face vibration S2 is set as degree of depth d5.That is, also the position at least exceeding end face and vibrate S2 compared with contact position P5 can be calculated as abrasion site P2.In the case, the end face vibration of lower surface 58e can reliably be reduced.In addition, above-mentioned first threshold and Second Threshold suitably set according to the state (end face vibration) of the grinding unit 58b before attrition process, degree of depth d1 and degree of depth d4 preferably sets according to the mode be equal to each other, but the mode that can be also different value according to degree of depth d1 and degree of depth d4 sets.
In the present embodiment, abrasion site P1 is equivalent to the first abrasion site, abrasion site P2 is equivalent to the second abrasion site, task driven motor 56 is equivalent to driving mechanism, and grinding stone cut-in device 32 is equivalent to the second travel mechanism, and grinding stone cut-in device 34 is equivalent to the 3rd travel mechanism, position P4 is equivalent to the first contact position, position P6 is equivalent to the second contact position, and current detecting part 86 and detection unit 88 play function as testing agency, and operational part 92 is equivalent to controlling organization.
Below, compare with the lapping device of existing traverse feed mode, while the action effect of lapping device 10 is described.Figure 13 is the schematic diagram of the state represented when using the lapping device of existing traverse feed mode to grind brake disc.Figure 13 is in Figure 22 (b), observes figure when brake disc 1, mano 9a and metate 9b along arrow X1 direction.In addition, Figure 13 (b) represents the state after making brake disc 1 revolve turnback under the state of Figure 13 (a).
As shown in figure 13, in the lapping device of traditional traverse feed mode, as shown in arrow Y1, Y2, making mano 9a and metate 9b from clipping brake disc 1 up and down, then grinding upper surface and the lower surface of brake disc 1.Herein, the brake disc 1 before attrition process has large end face vibration (such as about 50 μm).Therefore, when grinding beginning, the upper surface of brake disc 1 and the contact position of mano 9a, and the contact position of the lower surface of brake disc 1 and metate 9b (when observing from the axis direction of brake disc 1) in the circumference of brake disc 1 is very far apart from one another.In the case, the power F1 (F2) brake disc 1 applied from mano 9a along thickness direction and from metate 9b along thickness direction to the power F3 (F4) that brake disc 1 applies, be a good distance off and be reverse power in the circumference of brake disc 1.Therefore, larger bending stress is produced at brake disc 1.When grinding terminate rear mano 9a and metate 9b leave brake disc 1 time, this bending stress shows as the crooked of brake disc 1 itself.Its result, cannot reduce the end face vibration of brake disc 1 fully.
As shown in figure 14, in the lapping device 10 of present embodiment, when grinding grinding unit 58b, mano 16 and metate 18 are configured (fixing) respectively at abrasion site P1, P2.Grinding unit 58b contacts from outer peripheral face 58c with mano 16 and metate 18, then enters between mano 16 and metate 18 and is polished.That is, in lapping device 10, grinding unit 58b is ground towards inner circumferential side from side, periphery gradually by mano 16 and metate 18.In the case, can prevent from applying power along thickness direction to brake disc 58 (grinding unit 58b) from mano 16 and metate 18.Like this, owing to can prevent producing bending stress at brake disc 58, therefore, it is possible to reduce the end face vibration of brake disc 58 fully.Its result, before attrition process in operation (turnery processing), does not need high-precision processing, can reduce the manufacturing cost of brake disc 58.In addition, in the case, compared with the lapping device of the existing traverse feed mode of whole on the two sides of mano 9a and metate 9b simultaneous grinding brake disc 1, can prevent from producing large contact impedance between mano 16 and grinding unit 58b and between metate 18 and grinding unit 58b.Can reduce like this and make mano 16 and metate 18 rotate required driving force, therefore, grinding stone drive motors 28,30 can use more cheap motor.In addition, in order to make mano 16 and metate 18 rotate, do not need large driving force, therefore, grinding stone drive motors 28,30 can adopt miniaturized structure.Like this, the miniaturization of lapping device 10 can not only be realized, and the power consumption of lapping device 10 can be reduced.
Because mano 16 and the contact impedance between metate 18 and brake disc 58 reduce, therefore, it is possible to reduce the power (clamping force) being used for fixing brake disc 58 on support unit 54.The distortion of brake disc 58 itself can be prevented so fully.As a result, the end face vibration of brake disc 58 can fully be reduced.
In the lapping device 10 of present embodiment, abrasion site P1 is positioned at below it compared with the upper surface 58d of grinding unit 58b, abrasion site P2 is the side of being located thereon compared with the lower surface 58e of grinding unit 58b, therefore, it is possible to reliably reduce the end face vibration of grinding unit 58b.
In addition, in the lapping device 10 of present embodiment, based on the current value of the detected next task driven motor 56 of current detecting part 86, detection unit 88 can detect the contact position of mano 16 and grinding unit 58b and the contact position of metate 18 and grinding unit 58b.In the case, without the need to arranging separately the testing agency of the contact position for detecting mano 16 and grinding unit 58b and the testing agency for the contact position that detects metate 18 and grinding unit 58b, therefore, it is possible to reduce the manufacturing cost of lapping device 10.
In addition, utilize the current detecting part 86 shared to detect the current value of task driven motor 56, the change of the current value when change of current value when mano 16 contacts with grinding unit 58b and metate 18 contact with grinding unit 58b can be gone out like this with identical sensitivity technique.In the case, following situation can be prevented: at the grinding degree of depth d1 (with reference to Figure 12) of the part that the upper surface 58d of grinding unit 58b was ground by mano 16 before contact position P4 (with reference to Figure 12) is detected, and produce between the grinding degree of depth d4 (with reference to Figure 12) of the part of being ground by metate 18 before contact position P6 (with reference to Figure 12) is detected at lower surface 58e poor.Like this, can prevent the centre position of contact position P4 and contact position P6 from significantly departing from the center C1 (with reference to Fig. 2) of the thickness direction of grinding unit 58b.Therefore, it is possible to prevent the abrasion site P1 that calculates based on contact position P4 and the center of the thickness direction of the grinding unit 58b after attrition process is significantly departed from the centre position of abrasion site P2 that calculates based on contact position P6.That is, can easily make the center of the thickness direction of the grinding unit 58b after attrition process close to desirable position (position in design).Its result, can improve the dimensional accuracy of brake disc 58.
In addition, by detecting the current value of grinding stone drive motors 28,30, the contact position of mano 16 and metate 18 and grinding unit 58b can be detected, but preferred detection goes out the current value of work drive motors 56.Usually, the capacity ratio grinding stone drive motors 28 of task driven motor 56 and the electric capacity of grinding stone drive motors 30 little a lot (about 1/1/10th ~ 15th), therefore, the current value of the current value ratio grinding stone drive motors 28,30 of task driven motor 56 more easily changes.Therefore, when mano 16 or metate 18 contact a little with brake disc 58, the current value of task driven motor 56 also changes rapidly.Therefore, by detecting the current value of task driven motor 56, the contact position of mano 16 and metate 18 and grinding unit 58b can be detected correctly and rapidly.
In abrasion site 10, operational part 92 carry out for the control of the grinding stone cut-in device 32,34 that mano 16 and metate 18 are contacted with grinding unit 58b, the calculating of abrasion site P1, P2, for making mano 16 and metate 18 to the control of the control of the grinding stone cut-in device 32,34 of abrasion site P1, P2 movement and the platform drive motors 48 for the attrition process of implementing grinding unit 58b.That is, in lapping device 10, by the control of operational part 92, automatically calculate abrasion site P1, P2, and automatically implement the attrition process of grinding unit 58b.In the case, when processing multiple brake disc continuously, operator also without the need to setting abrasion site P1, P2 and implementing attrition process in each brake disc, and therefore, operating efficiency improves.
In lapping device 10, the pull bar 66 arranged at support unit 54 is utilized fixture 60 to be pulled to below, thus at the upper fixing brake disc 58 of support unit 54 (clamping device 62).Therefore, without the need to arranging the device being used for fixing brake disc 58 on support unit 54 on fixture 60.In the case, the space of the top of fixture 60 can be used as the space of carrying out operating, therefore, operating efficiency improves.In addition, due to the structure of lapping device 10 can be simplified, therefore, it is possible to reduce the manufacturing cost of lapping device 10.
Below, to use the situation of the lapping device grinding brake disc of existing traverse feed mode as comparative example, compare with the situation (embodiment) using the lapping device 10 of present embodiment to grind brake disc.
In a comparative example, according to method illustrated in fig. 22 grinding brake disc.As mano and metate, use the grinding stone identical with the mano 16 of Fig. 2 and metate 18.The materials'use CBN abrasive particle of polishing slate.In addition, the rotary speed of mano and metate is 1000rpm respectively, and the rotary speed of brake disc is 200rpm.Use with the mill spindle 20 of Fig. 1,22, be with 24,26 and grinding stone drive motors 28,30 identical components, make mano and metate rotation.Use the component identical with the bearing 52a of Fig. 1 and task driven motor 56, brake disc is rotated.In addition, use and the grinding stone cut-in device 32 of Fig. 1,34 identical components, mano and metate are moved up and down.In a comparative example, according to the method identical with the method in the step S4 and step S8 of Fig. 7, detect the contact position of mano and metate and brake disc, the contact position this detected is as the grinding starting position of mano and metate.
In an embodiment, the materials'use CBN abrasive particle of polishing slate 16b and polishing slate 18b.The rotary speed of mano 16 and metate 18 is 1000rpm respectively, and the rotary speed of brake disc is 200rpm.
The brake disc that external diameter (diameter) is 296mm is all employed in comparative example and embodiment.In a comparative example, grind 8 brake discs, in an embodiment, grind 20 brake discs.The upper surface of brake disc and the amount of grinding (being equivalent to degree of depth d2 and the degree of depth d5 of Figure 12) of lower surface are set as 0.12mm respectively.
Table 1 and table 2 represent the grinding result (change of end face vibration) of comparative example and embodiment respectively.The end face vibration (the end face vibration S1 with reference to Figure 12) of the upper surface of brake disc is represented in table 1 and table 2.Mean value in table 1 and table 2 is the value rounded up after decimal point.
(table 1)
(table 2)
As shown in table 1, in a comparative example, the end face of the brake disc before attrition process vibrates large, end face vibration cannot be reduced fully.And as shown in table 2, in an embodiment, the end face of the brake disc before attrition process vibrates large, also can reduce end face vibration fully.End face vibration particularly before attrition process is more than 100 μm, also end face vibration can be reduced to less than 10 μm.
In above-mentioned comparative example and embodiment, while the attrition process of brake disc, measure the current value of grinding stone drive motors.Figure 15 represents its result.Figure 15 (a) represents the routine measurement result in comparative example, and Figure 15 (b) represents the routine measurement result in embodiment.In addition, in fig .15, solid line represents the current value of the grinding stone drive motors driving mano, and dotted line represents the current value of the grinding stone drive motors driving metate.In the comparative example shown in Figure 15 (a), carry out the attrition process of brake disc at period T1.Peak A 1 before period T1, A2 are grinding starting position in order to calculate mano and metate and make the value that produces when mano and metate and brake disc.In the embodiment shown in Figure 15 (b), carry out the attrition process of brake disc at period T2.Peak A 3 before period T2, A4 are abrasion site P1, P2 in order to calculate mano 16 and metate 18 (with reference to Figure 12) and make mano 16 and metate 18 and the value produced during brake disc.
As shown in figure 15, in a comparative example, at period T1, the current value of grinding stone drive motors significantly rises, but in an embodiment, at period T2, the ascensional range of the current value of grinding stone drive motors 28,30 is little.It can thus be appreciated that, in a comparative example, at mano and produce large contact impedance between metate and brake disc, but in an embodiment, do not produce large contact impedance at mano 16 and between metate 18 and brake disc.Therefore, in lapping device 10 used in an embodiment, in order to make mano 16 and metate 18 rotate, do not need large driving force.Therefore, grinding stone drive motors 28,30, without the need to using H.D motor, can use cheap motor.The manufacturing cost of lapping device 10 can be reduced like this.
In the above-described embodiment, the position that the grinding of upper surface 58d and lower surface 58e that operational part 92 makes brake disc 58 advance to grinding unit 58b in step s 13 terminates, then, in step S14, make mano 16 and metate 18 be back to initial position, but, also can implement other process after step s 13 before step S14.Such as, also can, after step S13 terminates, mano 16 be declined, and make metate 18 increase, like this, carry out the grinding fine finishining of upper surface 58d and lower surface 58e.Or, also after step S13 terminates, or sparking out can be carried out after above-mentioned grinding fine finishining.Sparking out refers to, under the state that the position of the above-below direction of mano 16 and metate 18 is fixing, the rotation of mano 16 and metate 18 is maintained the stipulated time.
In addition, in the above-described embodiment, in the first travel mechanism Tr (with reference to Fig. 1), the linking part 52c of holding unit 52 is secured directly on sliding stand 44, but the structure of the first travel mechanism is not limited to above-mentioned example.Below, accompanying drawing is used to be described.
Figure 16 represents the lapping device 10a of other embodiments of the present invention.The difference of the lapping device 10a shown in Figure 16 and above-mentioned lapping device 10 is, replaces the first travel mechanism Tr, arranges the first travel mechanism TrA.Therefore, for the structure of the lapping device 10a beyond the first travel mechanism TrA, the description thereof will be omitted.In addition, the difference of the first travel mechanism TrA and above-mentioned first travel mechanism Tr is, has multiple (being 3 in the present embodiment) adjustment part 40; And replace holding unit 52, there is holding unit 53.In addition, holding unit 53 is with the difference of above-mentioned holding unit 52, replaces linking part 52c, has the linking part 52d of tabular.Therefore, for the structure of the first travel mechanism TrA beyond multiple adjustment part 40 and linking part 52d, the description thereof will be omitted.
With reference to Figure 16 (a), the linking part 52d of the first travel mechanism TrA of lapping device 10a has the shape reaming a round part when overlooking.Linking part 52d is installed on sliding stand 44 by multiple (being 3 in the present embodiment) adjustment part 40.In the present embodiment, three adjustment parts 40 (being 120 degree of intervals in the present embodiment) configure at equal intervals around holding unit 53 axle.As mentioned above, adjustment part 40 comprises adjustment screw 40a and clamping screw 40b, and adjustment screw 40a has flange part 40c in end thereon.With reference to Figure 16 (b), adjustment screw 40a screws togather with linking part 52d on sliding stand 44.Clamping screw 40b is inserted through in adjustment screw 40a, and screws togather with sliding stand 44.Between the flange part 40c and the head of clamping screw 40b of adjustment screw 40a, be provided with packing ring not shown in the figures, adjustment screw 40a presses downwards across this packing ring bolt 40b that is locked.Like this, the movement adjusting the above-below direction of spiral shell 40a is restricted.
Adjustment screw 40a is arranged in the mode that can rotate relative to bolt 40b, therefore, by making adjustment screw 40a rotate, the part screwed togather with adjustment screw 40a in linking part 52d can be made to move up and down.Therefore, in lapping device 10a, by rotating three the adjustment screw 40a linking sliding stand 44 and linking part 52d selectively, the horizontal adjustment of holding unit 53 can be carried out.The horizontal adjustment of brake disc 58 can be carried out like this.As a result, when the attrition process of brake disc 58, can prevent grinding unit 58b from contacting with mano 16 and metate 18 under the state tilted relative to mano 16 and metate 18, and can high-precision attrition process be carried out.
In lapping device 10a, such as shown in figure 17, when the lower surface of linking part 52d tilts relative to upper surface, rotate by making three adjustment screw 40a of the first travel mechanism TrA selectively, carry out the horizontal adjustment of linking part 52d (holding unit 53), the horizontal adjustment of brake disc 58 can be carried out like this.Therefore, in lapping device 10a, when the machining accuracy of linking part 52d (holding unit 53) is low, by carrying out the horizontal adjustment of linking part 52d, the high-precision attrition process of brake disc 58 can be carried out like this.In other words, according to lapping device 10a, the linking part 52d (holding unit 53) that machining accuracy can be used low carries out high-precision attrition process.
In lapping device 10a, such as, when change through time deterioration parts (such as bearing 52a) time, even if because of the scale error etc. that parts self exist, the rotating shaft K of brake disc 58 tilts, utilize the adjustment part 40 of the first travel mechanism TrA to carry out the horizontal adjustment of holding unit 53, easily can correct the inclination of rotating shaft K like this.
As mentioned above, according to lapping device 10a, the horizontal adjustment adjusting plate 38 can not only be carried out, also can carry out the horizontal adjustment of holding unit 53.Like this, when use machining accuracy low holding unit 53, also can carry out high-precision attrition process, therefore, also can process holding unit 53 accurately.The manufacturing cost of lapping device 10a can be reduced like this.In addition, when changing the parts of lapping device 10a etc., even if the rotating shaft K of brake disc 58 tilts, by carrying out the horizontal adjustment of holding unit 53, the inclination of rotating shaft K can easily be corrected.Like this, the maintenance of lapping device 10a becomes easy.
In the above-described embodiment, as shown in Figure 1, in the direction of the arrowx, advance by making brake disc 58 thus brake disc 58 is entered between mano 16 and metate 18, but the moving method of brake disc 58 is not limited to above-mentioned example.Below, accompanying drawing is used to be described.
Figure 18 is the plane of the lapping device 10b representing other embodiments of the present invention.The difference of the lapping device 10 shown in lapping device 10b and Fig. 1 shown in Figure 18 is, sliding stand 44 is according to arranging along the mode of Z-direction movement; And replace holding unit 52 and holding unit 93 is set.Therefore, for making sliding stand 44 can along the lapping device 10b beyond the structure of the structure of Z-direction movement and holding unit 93, the description thereof will be omitted.
As shown in figure 18, in lapping device 10b, on adjustment plate 38, pair of tracks 42 is arranged according to the mode extended along arrow Z-direction (direction orthogonal with the arrow X-direction of Fig. 1 when overlooking).Sliding stand 44 has the roller 46 rotated on track 42, can move along track 42 to arrow Z-direction.In addition, platform drive motors 48 is fixed on adjustment plate 38.Bar-shaped rotary screw 50 is fixed on the rotating shaft (not shown) of platform drive motors 48.Side, top and the sliding stand 44 of rotary screw 50 screw togather.Utilize the rotary driving force of platform drive motors 48, rotary screw 50 rotates, and sliding stand 44 moves towards arrow Z-direction.
Sliding stand 44 arranges holding unit 93.Holding unit 93 comprises: the maintaining part (not shown) same with the maintaining part 52b of Fig. 1; With the linking part 93a of the tabular be roughly rectangle when having and overlook.The linking part 52c of linking part 93a and Fig. 1 is same, is secured directly on sliding stand 44.The maintaining part of holding unit 93 is fixed on the end of cylinder 12 side on linking part 93a.Same with above-mentioned lapping device 10, the bearing unit N of supporting brake disc 58 is arranged in the maintaining part of holding unit 93.In such configuration, by making sliding stand 44 move along arrow Z-direction, same with above-mentioned lapping device 10, brake disc 58 can be made to enter between mano 16 and metate 18.The effect same with above-mentioned lapping device 10 can be obtained like this.In the present embodiment, sliding stand 44, platform drive motors 48, rotary screw 50 and maintenance single 93 are included in the first travel mechanism TrB.
In addition, also can replace the linking part 93a of holding unit 93, above-mentioned linking part 52d (Figure 16) is set, same with above-mentioned lapping device 10a, link holding unit and sliding stand 44 by multiple adjustment part 40.
Figure 19 is the plane of the lapping device 10c represented in another other embodiments of the present invention.The difference of the lapping device 10 shown in lapping device 10c and Fig. 1 shown in Figure 19 is, does not arrange track 42; Replace sliding stand 44 and turntable 94 is set; Replace platform drive motors 48 and rotary screw 50 and setting table electric rotating machine 96; And replace holding unit 52 and holding unit 98 is set.Therefore, for the structure of the lapping device 10c beyond turntable 94, platform electric rotating machine 96 and holding unit 98, the description thereof will be omitted.
As shown in figure 19, in lapping device 10c, in the mode that can rotate, turntable 94 is set on base station 36.Setting table electric rotating machine 96 in base station 36, turntable 94 is fixed on the rotating shaft 96a of platform electric rotating machine 96.The rotary driving force of platform rotary drive motor 96 is passed to turntable 94 by rotating shaft 96a, so turntable 94 rotates along arrow R direction.
Turntable 94 arranges holding unit 98.Holding unit 98 comprises: the maintaining part (not shown) same with the maintaining part 52b of Fig. 1; And discoideus linking part 98a.The linking part 52c of linking part 98a and Fig. 1 is same, is secured directly on turntable 94.Linking part 98a and turntable 94 coaxial are arranged.The maintaining part of holding unit 98 is fixed on linking part 98a.The maintaining part of holding unit 98 is arranged according to the mode of the axle center bias with turntable 94 (linking part 98a).Same with above-mentioned lapping device 10, the bearing unit N of supporting brake disc 58 is arranged in the maintaining part of holding unit 98.In such configuration, by making turntable 94 rotate along arrow R direction, same with above-mentioned lapping device 10, brake disc 58 can be made to enter between mano 16 and metate 18.The effect same with above-mentioned lapping device 10 can be obtained like this.In the present embodiment, turntable 94, platform electric rotating machine 96 and holding unit 98 are included in the first travel mechanism TrC.
In addition, also can replace the linking part 98a of holding unit 98 and above-mentioned linking part 52d (Figure 16) is set, same with above-mentioned lapping device 10a, link holding unit and turntable 94 by multiple adjustment part 40.
In the above-described embodiment, based on the change of the current value of task driven motor 56, detect the contact position of mano 16 and grinding unit 58b and the contact position of metate 18 and grinding unit 58b, but, detect that the method for the contact position of mano 16 and grinding unit 58b and the contact position of metate 18 and grinding unit 58b is not limited to above-mentioned example.Such as, also based on the change of the driving torque of the driving torque of task driven motor 56 or grinding stone drive motors 28,30, the contact position of mano 16 and grinding unit 58b and the contact position of metate 18 and grinding unit 58b can be detected.In the case, torque sensor is set in task driven motor 56 or grinding stone drive motors 28,30.
In addition, in the above-described embodiment, in order to calculate abrasion site P1, P2, after making mano 16 contact grinding unit 58b, metate 18 is contacted with grinding unit 58b, but the calculation method of abrasion site P1, P2 is not limited to above-mentioned example.Such as, both mano 16 and metate 18 can have been made to contact with grinding unit 58b simultaneously and calculate abrasion site P1, P2, also after making metate 18 contact with grinding unit 58b, mano 16 can be contacted with grinding unit 58b, then calculates abrasion site P1, P2.
In addition, in the above-described embodiment, abrasion site P1 is positioned at below it compared with the upper surface 58d of grinding unit 58b, and abrasion site P2 is the side of being located thereon compared with the lower surface 58e of grinding unit 58b, but the abrasion site of mano 16 and metate 18 is not limited to above-mentioned example.Such as, the abrasion site of mano 16 also can be the top of the position P7 (the outer rim b1 of upper surface 58d is minimum position) of Figure 12, and the abrasion site of metate 18 also can be the below of the position P8 of Figure 12 (the outer rim b2 of lower surface 58e is the highest position).
Above, preferred forms of the present invention is illustrated, but, obviously only otherwise depart from the scope of the present invention and aim, just can various change be carried out.Scope of the present invention is only defined by the appended claims.
Claims (5)
1. a lapping device for brake disc, this brake disc has the grinding unit that will be polished, and the feature of the lapping device of described brake disc is, comprising:
Support the bearing unit of described brake disc;
Driving mechanism, it applies rotary driving force to described bearing unit, and described brake disc is rotated;
Mano and metate;
Make the first travel mechanism of described bearing unit movement;
Make the second travel mechanism that described mano is retreated relative to the upper surface of described grinding unit;
Make the 3rd travel mechanism that described metate is retreated relative to the lower surface of described grinding unit;
Testing agency, it detects the first contact position of described mano and described upper surface and the second contact position of described metate and described lower surface; With
Control the controlling organization of described second travel mechanism and described 3rd travel mechanism, wherein,
Described driving mechanism comprises motor,
Described first contact position and described second contact position, based on the current value of described motor, detect in described testing agency,
Described controlling organization, before the attrition process of described grinding unit, by controlling described second travel mechanism, described mano is contacted with described upper surface, the first abrasion site is calculated based on described first contact position detected by described testing agency, and by controlling described 3rd travel mechanism, described metate is contacted with described lower surface, the second abrasion site of the below of described first abrasion site is calculated based on described second contact position detected by described testing agency
Described controlling organization, after calculating described first abrasion site, before the attrition process of described grinding unit, described mano is made to move to described first abrasion site by controlling described second travel mechanism, and after calculating described second abrasion site, before the attrition process of described grinding unit, described metate is made to move to described second abrasion site by controlling described 3rd travel mechanism
Described first abrasion site is positioned at below described first contact position, and described second abrasion site is positioned at above described second contact position,
Interval between described first abrasion site and described second abrasion site is less than the thickness of the described grinding unit of described brake disc,
Described first travel mechanism according to described grinding unit from the outer peripheral face of this grinding unit be configured in described first abrasion site and carry out the described mano that rotates and be configured in described second abrasion site and the described metate carrying out rotating contacts, then described grinding unit enters the mode between described mano and described metate, and described bearing unit is moved.
2. the lapping device of brake disc as claimed in claim 1, is characterized in that:
Described controlling organization, after calculating described first abrasion site and described second abrasion site, by controlling described second travel mechanism and described 3rd travel mechanism, described mano and described metate is made to move to described first abrasion site and described second abrasion site respectively, by controlling described first travel mechanism, contact with the described metate of described second abrasion site with the described mano of described first abrasion site from described outer peripheral face according to described grinding unit, then described grinding unit enters the mode between described mano and described metate, described bearing unit is moved.
3. the lapping device of brake disc as claimed in claim 1 or 2, is characterized in that:
Described bearing unit comprises:
The rotating part rotated by described driving mechanism;
Fixture, it is for being fixed on described rotating part by described brake disc, and this fixture is arranged on described brake disc; With
Pull bar, it is arranged in described rotating part, can retreat along the vertical direction, and can be locked to described fixture.
4. the lapping device of brake disc as claimed in claim 1 or 2, is characterized in that:
Described first travel mechanism comprises: the holding unit kept in the mode that can rotate by described bearing unit; With the adjustment part for carrying out horizontal adjustment to described holding unit.
5. a Ginding process for brake disc, it utilizes the mano of rotation and the grinding unit of metate to the brake disc supported by bearing unit to grind, and the feature of the Ginding process of described brake disc is, comprising:
To the operation that bearing unit applying rotary driving force makes brake disc rotate;
Before the attrition process of described grinding unit, described mano is made to decline and contact with the upper surface of described grinding unit, detect the first contact position of described mano and described upper surface, and calculate the operation of the first abrasion site based on described first contact position;
Before the attrition process of described grinding unit, described metate is made to rise and contact with the lower surface of described grinding unit, detect the second contact position of described metate and described lower surface, and calculate the operation of the second abrasion site below described first abrasion site based on described second contact position;
After calculating described first abrasion site, before the attrition process of described grinding unit, described mano is made to move to the operation of described first abrasion site;
After calculating described second abrasion site, before the attrition process of described grinding unit, described metate is made to move to the operation of described second abrasion site; With
Make the operation of described bearing unit movement,
Described first abrasion site is positioned at below described first contact position, and described second abrasion site is positioned at above described second contact position,
Interval between described first abrasion site and described second abrasion site is less than the thickness of the described grinding unit of described brake disc,
In the operation making described bearing unit movement, contact with the described metate being configured in described second abrasion site with the described mano being configured in described first abrasion site from the outer peripheral face of this grinding unit according to described grinding unit, then described grinding unit enters the mode between described mano and described metate, and described bearing unit is moved.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-018630 | 2010-01-29 | ||
| JP2010018630A JP5524643B2 (en) | 2010-01-29 | 2010-01-29 | Brake disk rotor grinding apparatus and grinding method |
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| Publication Number | Publication Date |
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| CN102189455A CN102189455A (en) | 2011-09-21 |
| CN102189455B true CN102189455B (en) | 2014-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110034851.4A Active CN102189455B (en) | 2010-01-29 | 2011-01-28 | Grinding device of brake disc and grinding method thereof |
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| JP (1) | JP5524643B2 (en) |
| CN (1) | CN102189455B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6110736B2 (en) * | 2013-06-18 | 2017-04-05 | ヨシワ工業株式会社 | Finishing machine |
| CN106271938B (en) * | 2016-08-09 | 2018-02-23 | 宁波市鄞州一箭精密机械有限公司 | A kind of double face abrading machine |
| CN108381389A (en) * | 2017-01-10 | 2018-08-10 | 苏州国质信网络通讯有限公司 | A kind of rotary grinding device |
| CN109551328B (en) * | 2017-09-22 | 2024-03-15 | 上海龙钰电梯配件有限公司 | Pre-grinding device for main drive additional brake of escalator |
| CN108406471A (en) * | 2018-03-28 | 2018-08-17 | 广德盛源电器有限公司 | A kind of two-sided polishing lathe of brake(-holder) block |
| CN108466152A (en) * | 2018-04-27 | 2018-08-31 | 苏州富强科技有限公司 | A kind of auto-measuring formula side polishing line |
| CN112548719B (en) * | 2020-12-15 | 2022-09-30 | 长春斯迈尔科技有限公司 | Surface auxiliary treatment equipment for carbon fiber material processing |
| CN113414651B (en) * | 2021-08-24 | 2021-11-05 | 烟台宏田汽车零部件股份有限公司 | Bidirectional clamping and damping brake disc polishing mechanical equipment |
| DE102022108706A1 (en) * | 2022-04-11 | 2023-10-12 | DVS Universal Grinding GmbH | GRINDING DEVICE AND METHOD FOR GRINDING A WORKPIECE |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5133155A (en) * | 1989-05-04 | 1992-07-28 | Ernst Thielenhaus Kg | Apparatus for grinding disk faces |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4701482B2 (en) * | 2000-08-10 | 2011-06-15 | 日本精工株式会社 | Method of manufacturing wheel bearing unit with brake rotor |
| JP2002263993A (en) * | 2001-03-12 | 2002-09-17 | Nisshin Kogyo Kk | Device and method for grinding brake disk rotor |
| JP2004066392A (en) * | 2002-08-06 | 2004-03-04 | Daisho Seiki Kk | Grinding method of vertical type double-head surface grinding machine for machining brake disk |
| JP4323828B2 (en) * | 2003-02-14 | 2009-09-02 | アイシン高丘株式会社 | Method and apparatus for grinding disc sliding surface in brake disc assembly |
| JP4846297B2 (en) * | 2005-08-03 | 2011-12-28 | Ｎｔｎ株式会社 | Brake disk braking surface processing device |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5133155A (en) * | 1989-05-04 | 1992-07-28 | Ernst Thielenhaus Kg | Apparatus for grinding disk faces |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2011156606A (en) | 2011-08-18 |
| CN102189455A (en) | 2011-09-21 |
| JP5524643B2 (en) | 2014-06-18 |
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