CN1200792C - Workpiece jointing method and appst. for connecting same - Google Patents
Workpiece jointing method and appst. for connecting same Download PDFInfo
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- CN1200792C CN1200792C CNB991185226A CN99118522A CN1200792C CN 1200792 C CN1200792 C CN 1200792C CN B991185226 A CNB991185226 A CN B991185226A CN 99118522 A CN99118522 A CN 99118522A CN 1200792 C CN1200792 C CN 1200792C
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
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Abstract
In the method for jointing workpieces, a servo-motor that stops at an aim-phase is used so that the 1st workpiece and the 2nd workpiece can be jointed. In such a method, the main shaft, in which said 1st workpiece is mounted, is rotated by siad servo-motor. Said 1st workpiece is contacted with said 2nd workpieces by means of the defined friction-pressure. After the joint-face between the 1st and the 2nd workpieces is softened to attain the desired state, the rotation speed of said main shaft is decreased. Before the rotation of the main shaft is stopped and when the phase of the main shaft is consistent with the stop-phase, the size of the torque, which is from said servo-motor and applied to said main shaft, of said main shaft is limited to be a definite value. By means of the friction-force between said joint-faces as well as the limited torque of said main shaft, the rotation of the main shaft will be stopped roughly at said stop-phase.
Description
Technical field
The present invention relates to a kind of workpiece joint method and engagement device that is used to engage workpiece, the relative rotation and the phase place that particularly relate in order to carry out between a plurality of workpiece cooperate and the friction welded method and the workpiece bonding device of employing servomotor.
Background technology
In the past, as the juncture of several workpiece, friction welded method was known.In this method, utilize the end face make two workpiece to be in contact with one another and rotate relatively and the frictional heat that produces and make its end face softening, by two workpiece being compressed mutually and two workpiece being bonded together.
This joint method is widely used for the joint of bar or tubing etc.Particularly since its engage precision, engage cost and productivity ratio higher, be very useful as the joint method of the product of producing in batches.
At this, in the past workpiece is engaged operation be illustrated.
At first, engaged 2 workpiece are installed on the workpiece bonding device.At this moment, the 1st workpiece is fixed on the chuck of rotary main shaft, and the 2nd workpiece is fixed on the non-rotary static chuck.At time t0 shown in Figure 8, main shaft begins rotation.After the rotating speed of main shaft reaches setting, keep this rotating speed, and the end face of the 1st workpiece of rotation is contacted with the end face of static the 2nd workpiece.At time t1, between two workpiece, apply the preheating thrust P0 that is used to make the both ends of the surface break-in by the thrust generator.Like this, owing to making the temperature of jointing end face, frictional heat rises.Through the t2 after the stipulated time, between two workpiece, apply friction thrust P1 greater than preheating thrust P0.Like this, the temperature of jointing end face rises significantly and forms heat zone, the metal softening of its heat zone.At time t3, two workpiece begin mutual embedding.Embedded quantity (total allowance) is relevant with the degree of depth of heat zone.At the metal softening of the joint interface time t4 to desired state, anxious being decelerated to of the rotation of workpiece stops.Meanwhile, between workpiece, apply upsetting thrust P2 greater than friction thrust P1.Like this, total allowance increases considerably.Be continuously applied the upsetting thrust P2 of certain hour in this state.The metal of heat zone cools off gradually, hardens.Its result, 2 workpiece are bonded together.
Shown in the double dot dash line among Fig. 8, be later than under the situation in the moment that applies upsetting thrust P2 in the moment that stops of main axis rotation, total allowance increases.On the other hand, shown in the dotted line among Fig. 8, be later than stopping under the situation constantly of main axis rotation in the moment that applies upsetting thrust P2, total allowance reduces.That is to say that the x1 or pressurization x2 time delay of upsetting thrust P2 time delay that stops by the change main shaft can adjust the total allowance when friction welded.
Below, with reference to Fig. 9 to the deceleration of main shaft and the speed of mainshaft when stopping and the relation between the main shaft torque be illustrated.
Fig. 9 represents to adopt induction conductivity as the main axis rotation motor, the speed of mainshaft, main shaft torque, thrust and total allowance in the workpiece joint method that the phase place of not carrying out between the workpiece cooperates.Dotted line among the figure is illustrated in when not making the contacted no-load run of two workpiece, the speed of mainshaft and main shaft torque during dry running.The time t5 that stops in the rotation of main shaft begins to apply upsetting thrust P2.
Before t4, be applied with the torque of its direction of rotation (positive direction) on the main shaft, main shaft is with certain rotating speed rotation.For the friction of revolving force on the joint interface between the workpiece that overcomes main shaft, the main shaft torque (dotted line) of the value of the main shaft torque (solid line) that at this moment applies during greater than dry running.At t4, stop to use torque to what main shaft applied that the rotation that is used to make main shaft stops.The direction that stops with torque is the direction (negative direction) opposite with the direction of rotation of main shaft.And, stop to equate with the value of the torque value when friction welded or during dry running.It is about 0.5 second that main axis rotation during dry running stops needed time T.Main shaft dwell time T when the main shaft when friction welded stops that the needed time, (from t4 to t5) was than dry running is short.This is because the friction between the workpiece is attached to cause on the deceleration torque as brake force.Like this, in not carrying out the friction welded operation that phase place cooperates, can utilize friction between the workpiece as a part that is used to make the anxious brake force of stopping of main axis rotation.Braking for motor can be adopted mechanical brakes such as disk brake.
Below, with reference to Figure 10 and Figure 11 the workpiece joint method that the phase place of carrying out between the workpiece cooperates is illustrated.
Figure 10 represents to adopt servomotor as the relation of main axis rotation with the speed of mainshaft, main shaft torque, thrust and total allowance in the workpiece joint method of motor in order to carry out phase place to cooperate.Figure 11 represents the relation of main shaft torque, main shaft phase place, thrust and total allowance.As shown in figure 10, the rotation of main shaft and Fig. 9 are set in the same manner it are stopped after second at T.Apply upsetting thrust P2 at time t5.In addition, dotted line is represented main shaft torque under the friction free dry running state among Figure 10.
In the compression bonding method of Figure 10, the rotation status of main shaft is fed control, and the position of rotation between two workpiece (phase place) is consistent.Time t4 is the time that the rotation of main shaft reduces speed now.For rotation is slowed down, the size of main shaft torque reduces gradually.Like this, the direction of main shaft torque is altered to the direction (negative direction) opposite with the direction of rotation of main shaft.Before the rotation of main shaft stopped, the impact when stopping in order correctly to carry out phase place cooperation and reduction was controlled servomotor, and the rotating speed of servomotor is slowly reduced.In this control, rotating speed and time relation are the exponential relationship of regulation.By the speed of mainshaft is changed along the deceleration curve of regulation, reduce the caloric value on the joint interface between two workpiece.Therefore, the softening no longer development of joint interface.So the metal that only will soften by the rotation of workpiece is to the radially release of contact interface.Its result, the contact area between the workpiece increases, and the friction between two workpiece increases.Aim at phase place in order to overcome this friction, on servomotor, be applied with relatively large torque.Like this, before the rotation of main shaft stops, making main axis rotation, on the direction of rotation (positive direction) of main shaft, apply bigger main shaft torque in order to overcome the friction between two workpiece that become brake force.Like this, as shown in figure 11, carry out phase place at time t5 and cooperate, so that main shaft stops on the target phase (0 °).
But, in fact owing to being had to go to the toilet at 0.5 second, the main shaft that rotates with the high speed of 2000rpm stops, even reach target phase (0 °) in time t5 main shaft phase place, because the big main shaft torque that applies on the direction of rotation (positive direction) of main shaft, main shaft will be above target phase and toning.In order to revise the rotation of this toning part, apply the correction torque of the direction opposite (negative direction) with direction of rotation.Like this, finally make the phase place of main shaft consistent with target phase (0 °).In addition, by reverse correction torque, make coupling part phase place unanimity under the state of distortion of workpiece.
In order to make the metal sclerosis at junction surface in this state, reaching target phase (0 °) afterwards, continue on two workpiece, to apply the main shaft torque and the upsetting thrust P2 of negative direction.After the metal sclerosis at junction surface, remove and apply main shaft torque and upsetting thrust P2.
When unloading the workpiece of such joint from engagement device, because its flexible effect, distortion is restored slightly.Like this, finally determine the phase place between the workpiece.Therefore, in this workpiece joint method, estimate the recovery amount of distortion and set the target phase (0 °) that main shaft stops.
As shown in figure 10, and Fig. 9 similarly the time t5 when main shaft stops between workpiece, to apply upsetting thrust P2.But different with the situation of Fig. 9, the recruitment of total allowance also changes because of the distortion between the workpiece before time t5.Because the variation of the total allowance that distortion is produced, total allowance is greater than the situation of Fig. 9.In addition, open an example that discloses the workpiece bonding device that carries out the phase place cooperation in the flat 9-174260 communique the spy.
But because the dispersiveness that workpiece material is formed, the resistance that friction produced on the joint interface varies in size.Therefore, under the big situation of the friction of joint interface, apply the main shaft torque as shown in phantom in Figure 11.I.e. main shaft torque when time t5 big usually the time, and, the torque that is used to revise toning on negative direction, applied sharp.Because this correction torque, main shaft surpass target phase (0 °) once more.Therefore, for the phase place with main shaft is adapted to target phase (0 °), must apply the main shaft torque of positive direction once more.Its result, two workpiece are being bonded together under the state of positive direction distortion.That is to say, under the state of the opposite direction distortion in the bonding part shown in solid line among Figure 11, engaging.Therefore, when workpiece bonding device unloads workpiece, because the recovery of this distortion, final phase place departs to opposite direction.Total allowance also increases on the contrary.
When the present inventor measured the phase place of the product that twists to opposite direction, the error of final phase place was 3 °.Therefore, only allow the product of 10 fens units for phase error, above-mentioned this final phase place will become defective work to the product that opposite direction departs from.In addition, this phenomenon is particularly evident under the situation of the thin-walled tubular material that joint interface is closely fixed.
Summary of the invention
Purpose of the present invention can be carried out the workpiece joint method that phase place cooperates accurately for providing a kind of.
In order to achieve the above object, the 1st embodiment of the present invention provides a kind of workpiece joint method that adopts servomotor to engage the 1st workpiece and the 2nd workpiece.This joint method comprises that employing produces relative rotary motion between the 1st workpiece and the 2nd workpiece servomotor makes the operation of the main axis rotation that the 1st workpiece is installed; Make the 1st workpiece and the 2nd workpiece the contacted operation of friction pressure with regulation; After softening to desirable state, the composition surface of the 1st and the 2nd workpiece makes the operation of the rotating speed deceleration of main shaft; Before the rotation of main shaft stops, when the phase place of main shaft and regulation stop phase place when consistent, the size of the main shaft torque that will apply to main shaft from servomotor is limited in the operation of setting; By making the rotation of main shaft roughly stop at the operation that stops on the phase place by power that friction produced between the composition surface and confined main shaft torque.
The 2nd embodiment of the present invention provides after a kind of operation that the rotating speed of main shaft slows down in above-mentioned the 1st embodiment, also comprises applying the workpiece joint method of operation that overcomes the power that is produced by the friction between the composition surface and main shaft is roughly stopped at stop the main shaft torque of direction of rotation on the phase place, main shaft (positive direction).
It is a kind of in above-mentioned the 1st embodiment that the 3rd embodiment of the present invention provides, the restriction of the electric current that provides to servomotor is provided the restriction operation of main shaft torque, and the size of the main shaft torque that applies according to this confined electric current is the workpiece joint method less than the value of frictional force between the composition surface.
It is a kind of in above-mentioned the 1st embodiment that the 4th embodiment of the present invention provides, and the 1st and the 2nd workpiece is the workpiece joint method of tubular material.
It is a kind of in above-mentioned the 1st embodiment that the 5th embodiment of the present invention provides, being suitable for the 1st workpiece is 2, the 2nd workpiece is 1, carries out the workpiece joint method of the workpiece bonding device (50) that phase place cooperates on the both ends of the surface that each the 1st workpiece are bonded on the 2nd workpiece.
The 6th embodiment of the present invention provides a kind of workpiece bonding device that is used to engage the 1st workpiece and the 2nd workpiece.This device possesses the main shaft of fixing the 1st workpiece; Servomotor so that make main axis rotation, thereby makes the 1st workpiece rotate relatively with respect to the 2nd workpiece; Detect the phase-detection mechanism of main shaft phase place; The pressure generator is so that make the 1st workpiece and the 2nd workpiece contact with the friction pressure of stipulating; Be used to control the controller of servomotor rotation.Controller makes the rotating speed of main shaft slow down after the composition surface of the 1st and the 2nd workpiece softens to desirable state, before the rotation of main shaft stops, stop phase place when consistent when the phase place of main shaft and regulation, to be restricted to setting from the size that servomotor is applied to the main shaft torque on the main shaft, stop on the phase place by the rotation of main shaft roughly being stopped at by power that friction produced between the composition surface and confined main shaft torque.
Novel feature of the present invention as can be known from additional claims.By the following explanation of present most preferred embodiment being done with reference to accompanying drawing, can understand objects and advantages of the present invention simultaneously.
Description of drawings
Fig. 1 is the sectional view of the workpiece bonding device of the 1st embodiment.
Fig. 2 is the transverse sectional view of workpiece bonding device in the presentation graphs 1.
Fig. 3 is the block diagram of the control device of workpiece bonding device in the presentation graphs 1.
Fig. 4 is the sequential chart of the workpiece joint method of expression present embodiment.
Fig. 5 A is the sequential chart that is used for the workpiece joint method phase place fitting method of key diagram 4.
Fig. 5 B is that rotation stops the speed of mainshaft before and the sequential chart of main shaft phase place among the presentation graphs 5A.
Fig. 6 is the partial sectional view of workpiece bonding device among expression the 2nd embodiment.
Fig. 7 is the partial sectional view of workpiece bonding device among expression the 3rd embodiment.
Fig. 8 is the sequential chart of expression workpiece joint method in the past.
Fig. 9 is the sequential chart of expression workpiece joint method in the past.
Figure 10 is the sequential chart of workpiece joint method in the example in the past of representing other.
Figure 11 is the sequential chart of workpiece joint method in the example in the past of representing other.
The specific embodiment
Below, referring to figs. 1 through Fig. 3 the workpiece bonding device 1 of the present invention the 1st embodiment is illustrated.By this workpiece bonding device 12 workpiece W1, W2 are joined together.
As shown in Figure 2, equipment support 2 is a horizontal arrangement.Slip as the thrust generator is fixed on the equipment support 2 by bearing bracket stand 3 with servomotor 4.In order to make 5 one-tenth levels of lead screw shaft, the one end is installed in by shaft coupling 6 and slides with on the rotating shaft of servomotor 4, and the other end is by bearing bracket stand 7 rotatably supports.On equipment support 2, be formed with straight dynamic bearing (linear guide) 8 abreast with lead screw shaft 5.Main spindle box 9 can be configured on this straight dynamic bearing 8 slidably along straight dynamic bearing 8.Arm 9a extends downwards from main spindle box 9.Arm 9a is connected with lead screw shaft 5 spirals by nut 10 and force cell 11.When making lead screw shaft 5 rotations by slip with servomotor 4, main spindle box 9 slides to Y direction shown in Figure 2.At this moment, force cell 11 is measured the actual thrust between nut 10 and the arm 9a.
On the equipment support 2 relative with chuck 13 to the position on dispose clamp 18.This clamp 18 is the workpiece W2 of tubulose fixedly.The right-hand retainer 19 that is disposed at clamp 18.
And workpiece bonding device 1 possesses the unshowned control device of Fig. 2.Its control device comprises controller shown in Figure 3 23.On controller 23, be connected with the operation board 22 that constitutes by CTR20 and digital switch 21.Be connected with above-mentioned slip servomotor 4 by sliding with servo-driver (servo amplifier) 24 on the controller 23.And, be connected with above-mentioned main axis rotation servomotor 14 by rotation with servo-driver (servo amplifier) 25 on the controller 23.In addition, be connected with the quality guarantee device 28 that constitutes by CRT26 and CPU27 on the controller 23.Quality guarantee device 28 passes to controller 23 with the signal relevant with the time with the length of workpiece.On the CPU27 of quality guarantee device 28, be connected with speed of mainshaft meter 29.Speed of mainshaft meter 29 monitors the rotation status (for example rotating speed, phase place and torque) of main shaft 12, and the signal relevant with the rotation status of this main shaft 12 passed to CPU27.In addition, speed of mainshaft meter 29 also can monitor main axis rotation servomotor 14.Above-mentioned force cell 11 is connected on the controller 23 by conveyer 30.Conveyer 30 is connected with the CPU27 of quality guarantee device 28, transmits and the relevant signal of thrust (pressure) that is provided between the workpiece.
In addition, adopt each to enclose, be that per 360 degree are exported the motor of 10000 pulse signals as main axis rotation servomotor 14.Therefore, can detect the position of rotation of main axis rotation accurately by controller 23 with servomotor 14.
Below, with reference to Fig. 4 and Fig. 5 the workpiece joint method of workpiece bonding device 1 is illustrated.Fig. 4 represents the speed of mainshaft, thrust (pressure) and total allowance with time series respectively.
At first, workpiece W1, W2 are clamped in respectively on chuck 13 and the clamp 18, and make the central axis unanimity of each workpiece.Then, at time t0 shown in Figure 4, make main shaft 12 rotations with motor 14 by main axis rotation.The rotating speed of main shaft 12 is maintained definite value (for example 2000rpm).Make lead screw shaft 5 rotations by sliding with servomotor 4, and main spindle box 9 is moved to workpiece W2 along Y direction (with reference to Fig. 2).In addition, the rotating speed of main shaft 12 is to set according to material and the shape (for example tubing/middle real material, outside dimension) of workpiece W1, W2.
Afterwards, at time t1, workpiece W1, W2 are in contact with one another.At this moment, carry out the frictional heating operation, on the contact interface of workpiece W1, W2, apply preheating thrust P0.This preheating thrust P0 is the less pressure that is applied to for the concavo-convex break-in that makes the composition surface between two workpiece W1, the W2.By at two workpiece W1.Apply preheating thrust P0 between the W2, the increase of the transition torque that the contact initial stage of two workpiece W1, W2 can be produced suppresses lowlyer.Like this, through certain hour and time of advent during t2, beginning applies the friction thrust P1 greater than preheating thrust P0 between two workpiece W1, W2.Therefore, produce frictional heat on joint interface, because this frictional heat, the metal of joint interface begins to soften.Like this, at time t3, two workpiece W1, W2 begin to embed.
Begin to through the time t4 behind the certain hour from the t2 that applies friction thrust P1, joint interface softens to desirable state.Carry out upsetting pressurization operation at time t4, the control main axis rotation is used servomotor 14 so that the rotation of main shaft 12 is slowed down.Like this, at the time t5 that main shaft 12 stops, applying upsetting thrust P2 with servomotor 4 greater than the thrust P1 that rubs by sliding.
With reference to Fig. 5 A, Fig. 5 B to the deceleration of main shaft 12 and the speed of mainshaft, main shaft torque and main shaft phase place when stopping described in detail.In Fig. 5 A, Fig. 5 B, solid line is represented the variation of each state in the present embodiment, and dotted line is represented the variation of each state in the example in the past.
At first, when the composition surface that controller 23 is judged two workpiece W1, W2 had reached desirable soft state (time t4), controller 23 stopped the rotation of main shaft 12, applied the main shaft torque of opposite with direction of rotation (bearing) on motor 14 in main axis rotation.Though under the situation that the rotation of main shaft 12 slowly stops, needn't to apply the main shaft torque of negative direction, in the present embodiment, to stop in order making to have to go to the toilet at 0.5 second, so on negative direction, applied big torque with the main shaft of the rotating speed rotation of 2000rpm.
Like this, when the rotating speed of main shaft 12 during less than setting, controller 23 control main axis rotation make its torque that applies direction of rotation (positive direction) with motors 14, so that make the rotating speed of main shaft 12 consistent with the deceleration curve of regulation and stop on the target phase (0 °) of regulation.In detail, the brake force that produces with respect to the friction on the joint interface applies the main shaft torque that main shaft is rotated to positive direction by main axis rotation between two workpiece W1, W2 with motor 14.Afterwards, controller 23 according to the signal from speed of mainshaft meter 29 detect regulation stop control beginning phase theta the time (t5), it is definite value (torque-limiting) below the Q that controller 23 makes the size of main shaft torque, will be limited in setting with the electric current that servomotor 14 provides to main axis rotation.Like this, shown in Fig. 5 B, main shaft 12 is stopping when moment t5 only advances to moment t5a because of the frictional force between workpiece W1, the W2.At this moment, the phase place of main shaft 12 is for only from stopping to control the advanced final phase place A of braking angle [alpha] of beginning phase theta.The inertia turning moment of frictional force, torque-limiting Q and rotary part kind between braking angle [alpha] and workpiece W1, the W2 is relevant, obtains by carrying out conjugation test in advance.In addition, for relatively, in Fig. 5 A, 5B, represent variation of the prior art with double dot dash line.
Though being set in, servomotor 14 stops on the target phase (0 °) when zero load, but when workpiece engages, when detecting (t5) when stopping control beginning phase theta, with the torque-limiting Q of main shaft torque limit at smaller value, servomotor 14 mainly stops at target phase (0 °) control that roughly stops before by the frictional force between workpiece W1, the W2 to begin on the phase theta (final phase place A) by controller 23.Therefore, before the rotation of main shaft 12 stopped, what do not apply negative direction or positive direction between workpiece W1, W2 stopped torque more greatly.
Like this, same as the prior art till the time t5, apply phase place on servomotor 14 in main axis rotation and cooperate and use torque, so that it is stopped on the target phase (0 °).But, after controller 23 detects the time t5 that stops to control the beginning phase theta, only apply the torque-limiting Q of direction of rotation (positive direction) on servomotor 14 in main axis rotation.
Consider the distortion recovery amount of braking angle [alpha] and two workpiece W, W2 when workpiece bonding device 1 unloads, will stop to control the beginning phase theta and be set in before 5 ° of the target phase of servomotor 14 (0 °) for example.And, in the present embodiment, as shown in Figure 4,, between two workpiece W1, W2, apply and be used for the upsetting thrust P2 that solid phase engages two workpiece W1, W2 at the time t5 that main shaft 12 stops.And the size of torque-limiting Q is set for by not producing the value of slip based on the experiment in advance of crimping conditions such as the profile of each workpiece and material on the joint interface of main shaft 12.The moment that applies upsetting thrust P2 can be set arbitrarily according to desirable total allowance.The moment that applies upsetting thrust P2 is according to determining from the elapsed time that t4 begins, if but apply moment of upsetting thrust P2 according to the phase place adjustment of main shaft 12, then can make the bonding error of workpiece littler.
Like this, after stopping to apply upsetting thrust P2, unclamp chuck 13, main spindle box 9 is moved to left, unload workpiece W1, the W2 of joint, thereby obtain the workpiece W1, the W2 that engage with desirable phase place from engagement device 1.
As mentioned above, slide with the control of motor 4 and main axis rotation by controller 23 with position command, torque and the rotating speed of motor 14.Therefore, when unloading workpiece W1, the W2 of joint, can obtain correct workpiece W1, the W2 that cooperates of phase place from workpiece bonding device 1.Wherein, because the dispersiveness of elastic properties of materials coefficient, the error when unloading workpiece W1, W2 produces for example error about 15 minutes.And, total allowance is controlled at for example about 8mm.In addition, the joint of workpiece W1, the W2 that is undertaken by this workpiece joint method not only can carry out in metal of the same race, also can carry out in metal not of the same race.
In addition, in the present embodiment, speed of mainshaft meter 29 constitutes phase-detection mechanism.
Can obtain following effect according to the workpiece joint method among the 1st embodiment.
(1) as Figure 10 and shown in Figure 11, in workpiece joint method in the past, when phase place cooperates, because the friction on the joint interface increases before main axis rotation stops, so with respect to by the friction caused brake force, quickening to be applied with big main shaft torque on the side (positive direction), and carrying out the deceleration of main axis rotation and stop, so that the phase place between two workpiece becomes target phase (0 °).
Relative therewith, in the 1st embodiment,, be limited in the electric current that flows in the servomotor 14 by controller 23 when the phase place of main shaft 12 becomes when stopping control beginning phase theta.Therefore, the export-restriction with the main shaft torque can not apply above predetermined restricted torque Q.Produce the value of sliding because this torque-limiting Q is set in not make on the joint interface, so by the frictional force on the joint interface, main axis rotation stops at its phase place and is roughly and stops on the control beginning phase theta.
Its result before main axis rotation stops, owing to be applied with bigger main shaft torque on the main shaft 12, stops control beginning phase theta so the phase place between workpiece W1, the W2 is roughly.
And, as shown in Figure 5, owing under the state that applies the torque-limiting Q on the direction (positive direction) that makes main axis rotation continuously, finish the joint of workpiece, engage under the state that the phase place between workpiece W1, the W2 is left-hand tools direction (positive direction) side twists.Like this, can carry out the cooperation of phase place, reverse so prevent the direction of twist between workpiece W1, the W2 reliably owing to before main axis rotation stops, needn't applying bigger main shaft torque.Therefore, when unloading workpiece W1, the W2 of joint,, also can guarantee the phase place of two workpiece W1, W2 reliably even distortion is restored from workpiece bonding device 1.
(2) owing to the workpiece W1, the W2 that adopt tubulose, so when main shaft 12 slowed down and stops, the friction on the joint interface of each workpiece W1, W2 sharply increased.By on one's own initiative this frictional force being used for the brake force of main axis rotation before stopping, making the rotation of main shaft 12 stop to be roughly reliably and stop on the control beginning phase theta.
(3) be limited to main shaft 12 when stopping though carrying out applying in the method that phase place cooperates the moment of upsetting thrust P2 in the prior art, but in the present embodiment, because the moment that applies upsetting thrust P2 is not limited to main shaft 12 when stopping, so the free degree of crimping condition increases.Its result, the crimping condition enactment that can easily suit.
(4) owing to, when phase place cooperates, do not apply the torque that overcomes the rubbing surface resistance, can carry out the phase place cooperation in ground, in addition, can use small-sized main axis rotation servomotor 14 so can economize as prior art.And, under the situation of the servomotor 14 that uses identical power consumption, compared with prior art, can carry out the friction welded of the bigger workpiece of diameter.
(5) adopt the engagement device of mechanical work piece in the past of oil pressure, for example disclosed workpiece bonding device produces the impulsive sound of 120～140db when phase place cooperates in the special fair 8-15673 communique.Relative therewith, according to the workpiece joint method of present embodiment, do not apply bigger main shaft torque during owing to deceleration, so when phase place cooperates, do not produce impulsive sound.
(6) in the workpiece bonding device 1 of present embodiment, owing to the main shaft 12 of rotation is moved and carry out crimping, so can be chosen in the fixing means of workpiece W2 fixing on the non-rotary clamp 18 arbitrarily.
With reference to Fig. 6 the workpiece bonding device 40 of the 2nd embodiment is illustrated.In addition, give identical symbol for structure identical and parts, and omission will be described with the 1st embodiment.
In the 1st embodiment, main shaft 12 1 sides that are positioned at rotation one side are what slide.But be provided with non-rotary clamp 41 in the workpiece bonding device 40 of the 2nd embodiment movably.
As shown in Figure 6, clamp 41 is slidably disposed on the straight dynamic bearing 8.Clamp 41 is connected on the lead screw shaft 5 by nut 10 and force cell 11 spirals.Workpiece W2 is fixed by clamp 41.Be used to limit workpiece W2 and be fixed on clamp 41 to axially movable retainer 42.On equipment support 2, be fixed with relative with retainer 42 to, be used for the main spindle box 43 of rotatably support main shaft 12.Workpiece W1 is fixed by the chuck 13 of main shaft 12.In the 2nd embodiment, by clamp 41 will move, non-rotary workpiece W2 goes up by the workpiece W1 that is pressed in rotation and two workpiece W1, W2 are joined together.
Therefore, by implementing above-mentioned workpiece joint method, then can obtain effect identical with the 1st embodiment except above-mentioned (6) with this workpiece bonding device 40.In addition because main shaft 12 do not move, so main axis rotation become easily with the configuration of the necessary electric wiring of control of servomotor 14, in addition, owing to the weight saving that is moved parts, so but clamp 41 high-speed mobile, very practicality.
With reference to Fig. 7 the workpiece bonding device 50 of the 3rd embodiment is illustrated.In addition, give identical symbol for structure identical and parts, and omission will be described with the 1st embodiment.
In workpiece bonding device 50, engaging on intermediate piece W3 has two workpiece W1, and carries out the phase place cooperation of the workpiece W1 at two ends simultaneously.
As shown in Figure 7, workpiece bonding device 50 possesses two sideway swivels of workpiece W1 on equipment support 2 and the mobile parts (sliding with servomotor 4, main axis rotation servomotor 14 etc.) that are used to make separately.That is, intermediate piece W3 is fixed on the clamp 51, and two workpiece W1 are pressed against while rotating on the both ends of the surface of this intermediate piece W3.
Therefore, implement above-mentioned workpiece joint method, then can obtain the effect identical with the 1st embodiment by workpiece bonding device 50 with the 3rd embodiment.In addition, owing to can engage two workpiece W1 simultaneously, thus can improve the productivity ratio of unit interval, very practical.
In addition, the present invention is not limited in the various embodiments described above, also can followingly implement.
In order to limit the main shaft torque, with the electric current restriction of servomotor 14 rotation of main shaft 12 is stopped by carrying out main axis rotation, but be not limited in this.For example also can followingly implement.
(1) with the electric current (servo stopping) of servomotor 14 main shaft 12 is stopped by cutting off fully to main axis rotation.Wherein, though can not carry out Position Control in this case, the detection of position of rotation itself can be carried out.
(2) for the rotation that makes main shaft 12 stops, can adopting an interlock.This function forbids adding the axle rotation of interlocking and moving, and the rotation of axle is slowed down when applying interlocking, moves to stop.On the other hand, the rotation of axle and moving begins once more when removing interlocking.
(3) workpiece bonding device 1 is operation automatically, but but also can make this interrupt that operates to automatically.In this case, can when emergency, stop workpiece bonding device 1 rapidly.
(4) also can main shaft 12 be stopped by the machine locking device that slave controller 23 or not to the pulse (rotation move) of motor 14 outputs.
(5), can make the output of main shaft torque saturated and main shaft 12 is stopped in order not export torque with respect to torque instruction above setting.In this case, export torque value when saturated and less than the resistance that produces by the friction on the joint interface time, become parallel and state that phase deviation remains unchanged under this state.
So long as before the main shaft 12 that is applied with bigger main shaft torque on the main shaft 12 stops, detect stop control beginning phase theta after, not controlling servomotor 14 stops on the target phase (0 °), and the structure of only utilizing friction between the workpiece and torque-limiting Q that the rotation of main shaft is stopped, then other structure can change arbitrarily.
In the various embodiments described above, main axis rotation is delivered to main shaft 12 with the rotation of servomotor 14 by each gear 15,16 and 17.But can be not yet by these gears 15,16 and 17 and by servomotor 14 direct drive shaft 12.
In the various embodiments described above, begin through during the t4 after the stipulated time from the time t2 that applies friction thrust P1, the rotation of main shaft reduces speed now.Promptly by time control, the rotation of main shaft reduces speed now.But the size Control that the length of workpiece W1, W2 in the time of also can be according to crimping reduces speed now.That is to say that according to detecting total allowance with slip with the relevant information of the rotation of servomotor 4, the rotation of main shaft reduces speed now when reaching the regulation total allowance.
With reference to accompanying drawing embodiments of the invention are illustrated, but the present invention is not limited to this, can in the record of appending claims and the scope that is equal to thereof, change.
Claims (6)
1. a workpiece joint method is used to adopt servomotor (14) to engage the 1st workpiece (W1) and the 2nd workpiece (W2, W3), it is characterized in that:
Comprise that employing produces relative rotary motion between above-mentioned the 1st workpiece (W1) and the 2nd workpiece (W2, W3) above-mentioned servomotor (14) makes the operation of main shaft (12) rotation that above-mentioned the 1st workpiece (W1) is installed;
Make above-mentioned the 1st workpiece (W1) and above-mentioned the 2nd workpiece (W2, W3) the contacted operation of friction pressure (P0, P1) with regulation;
(t4) makes the operation that the rotating speed of above-mentioned main shaft (12) slows down after the composition surface of the above-mentioned the 1st and the 2nd workpiece (W1, W2, W3) softens to desirable state;
Before the rotation of above-mentioned main shaft (12) stops, when the phase place of above-mentioned main shaft (12) and regulation stop phase place (θ) when consistent (t5), the size of the main shaft torque that will apply to above-mentioned main shaft (12) from above-mentioned servomotor (14) is limited in the operation of setting (Q);
By making the rotation of above-mentioned main shaft (12) roughly stop at the above-mentioned operation that stops on the phase place by power that friction produced between the above-mentioned composition surface and confined main shaft torque.
2. workpiece joint method according to claim 1, it is characterized in that: after the operation that the rotating speed of above-mentioned main shaft (12) slows down, also comprise applying overcoming the power that produces by the friction between the above-mentioned composition surface and making above-mentioned main shaft roughly stop at the operation of the main shaft torque of the above-mentioned direction of rotation that stops on the phase place, above-mentioned main shaft.
3. workpiece joint method according to claim 1, it is characterized in that: the restriction of the electric current that provides to above-mentioned servomotor (14) is provided the restriction operation of above-mentioned main shaft torque, and the size of the above-mentioned main shaft torque (Q) that applies according to this confined electric current is the value less than frictional force between the above-mentioned composition surface.
4. workpiece joint method according to claim 1 is characterized in that: above-mentioned the 1st workpiece and the 2nd workpiece (W1, W2, W3) are tubular material.
5. workpiece joint method according to claim 1, it is characterized in that: be applicable to that above-mentioned the 1st workpiece (W1) is 2, above-mentioned the 2nd workpiece (W3) is 1, carries out the workpiece bonding device (50) that phase place cooperates on the both ends of the surface that each the 1st workpiece (W1) are bonded on above-mentioned the 2nd workpiece (W3).
6. a workpiece bonding device is used to engage the 1st workpiece (W1) and the 2nd workpiece (W2, W3), it is characterized in that:
The main shaft (12) that possesses fixing above-mentioned the 1st workpiece (W1);
Servomotor (14) so that make above-mentioned main shaft (12) rotation, thereby makes above-mentioned the 1st workpiece (W1) with respect to the relative rotation of above-mentioned the 2nd workpiece (W2, W3);
Detect the phase-detection mechanism (29) of above-mentioned main shaft (12) phase place;
Pressure generator (4,5,9a, 10) is so that make above-mentioned the 1st workpiece (W1) and above-mentioned the 2nd workpiece (W2, W3) contact with the friction pressure (P0, P1) of regulation;
Controller (23) is so that control the rotation of above-mentioned servomotor (14);
Above-mentioned controller (23) is at the above-mentioned the 1st and the 2nd workpiece (W1, W2, W3) (t4) slowed down the rotating speed of above-mentioned main shaft (12) after composition surface softened to desirable state, before the rotation of above-mentioned main shaft (12) stops, stop phase place (θ) when consistent (t5) when the phase place of above-mentioned main shaft (12) and regulation, to be restricted to setting (Q) from the size that above-mentioned servomotor (14) are applied to the main shaft torque on the above-mentioned main shaft (12), by making the rotation of above-mentioned main shaft (12) roughly stop at above-mentioned stopping on the phase place by power that friction produced between the above-mentioned composition surface and confined main shaft torque.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25287398A JP4478229B2 (en) | 1998-09-07 | 1998-09-07 | Friction welding method |
| JP252873/1998 | 1998-09-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1247113A CN1247113A (en) | 2000-03-15 |
| CN1200792C true CN1200792C (en) | 2005-05-11 |
Family
ID=17243361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB991185226A Expired - Lifetime CN1200792C (en) | 1998-09-07 | 1999-09-06 | Workpiece jointing method and appst. for connecting same |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP4478229B2 (en) |
| KR (1) | KR100343300B1 (en) |
| CN (1) | CN1200792C (en) |
| TW (1) | TW426567B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007118346A1 (en) * | 2006-04-13 | 2007-10-25 | Changchun Cnc Machine Tool Co., Ltd. | Friction drive apparatus by ball screw in rotary friction welding machine |
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| US20060043155A1 (en) * | 2004-08-24 | 2006-03-02 | Jeff Lovin | Method and system of friction welding |
| DE102005040265A1 (en) * | 2005-08-24 | 2007-03-01 | Müller Weingarten AG | Method and device for controlling and regulating forces on servo-electric presses |
| KR100809643B1 (en) | 2006-10-27 | 2008-03-07 | 정운규 | Apparatus for a friction welding |
| CN101952077B (en) * | 2008-02-22 | 2013-08-28 | 株式会社丰田自动织机 | Friction welding device |
| JP5290779B2 (en) * | 2008-03-05 | 2013-09-18 | 株式会社豊田自動織機 | Friction welding method |
| DE102009049892B3 (en) * | 2009-10-20 | 2011-01-05 | Emag Holding Gmbh | Device for connecting a workpiece with a joining part using laser radiation, where the workpiece and the joining part are connected along a given joining line by a welding seam, comprises a workpiece carrier movable along a guide web |
| CN102310263A (en) * | 2010-06-30 | 2012-01-11 | 中村留精密工业株式会社 | Friction compression joint machine and friction compression joint method |
| CN101972890A (en) * | 2010-10-14 | 2011-02-16 | 西安交通大学 | Servo direct-drive double-acting multifunctional friction welding machine |
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| US8887388B2 (en) | 2010-11-22 | 2014-11-18 | Andrew Llc | Method for interconnecting a coaxial connector with a solid outer conductor coaxial cable |
| JP5841755B2 (en) * | 2011-06-30 | 2016-01-13 | 高周波熱錬株式会社 | Rack manufacturing apparatus and rack manufacturing method |
| CN102896433A (en) * | 2012-10-17 | 2013-01-30 | 国家电网公司 | Automatic welding method of columnar piece |
| JP6530882B2 (en) * | 2012-12-27 | 2019-06-12 | 高周波熱錬株式会社 | Rack manufacturing apparatus and rack manufacturing method |
| US11465230B2 (en) * | 2018-07-18 | 2022-10-11 | Citizen Watch Co., Ltd. | Machine tool |
| CN110227882B (en) * | 2019-05-31 | 2021-02-19 | 杭州奥霸机械制造有限公司 | Automobile accessory machining welding equipment and using method thereof |
| JP7261678B2 (en) * | 2019-07-04 | 2023-04-20 | シチズン時計株式会社 | Machine tools and processing methods |
| DE112020004580T5 (en) * | 2019-09-26 | 2022-06-09 | Hitachi Astemo, Ltd. | Method of making a bar |
| CN110888357B (en) * | 2019-11-22 | 2021-06-29 | 珠海格力智能装备有限公司 | Robot control method and device |
| CN111660004A (en) * | 2020-06-22 | 2020-09-15 | 中国核工业第二二建设有限公司 | Welding equipment and method for embedded part of steel bar |
| CN111745290A (en) * | 2020-08-04 | 2020-10-09 | 桐乡辰宇机械有限公司 | Friction welding equipment and welding method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3491661B2 (en) * | 1996-08-22 | 2004-01-26 | トヨタ自動車株式会社 | Friction welding method |
-
1998
- 1998-09-07 JP JP25287398A patent/JP4478229B2/en not_active Expired - Lifetime
-
1999
- 1999-09-06 TW TW088115329A patent/TW426567B/en not_active IP Right Cessation
- 1999-09-06 CN CNB991185226A patent/CN1200792C/en not_active Expired - Lifetime
- 1999-09-06 KR KR1019990037630A patent/KR100343300B1/en active IP Right Grant
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007118346A1 (en) * | 2006-04-13 | 2007-10-25 | Changchun Cnc Machine Tool Co., Ltd. | Friction drive apparatus by ball screw in rotary friction welding machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4478229B2 (en) | 2010-06-09 |
| KR100343300B1 (en) | 2002-07-15 |
| JP2000084680A (en) | 2000-03-28 |
| CN1247113A (en) | 2000-03-15 |
| KR20000022928A (en) | 2000-04-25 |
| TW426567B (en) | 2001-03-21 |
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Correction item: Inventor Correct: First inventor Kawaura Koichi False: First inventor Chuan Puguang Number: 19 Volume: 21 |
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Granted publication date: 20050511 |