CN118875463B - A kind of emergency stop device for rotating friction welding spindle - Google Patents
A kind of emergency stop device for rotating friction welding spindle Download PDFInfo
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- CN118875463B CN118875463B CN202411366274.2A CN202411366274A CN118875463B CN 118875463 B CN118875463 B CN 118875463B CN 202411366274 A CN202411366274 A CN 202411366274A CN 118875463 B CN118875463 B CN 118875463B
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- 238000003466 welding Methods 0.000 title claims abstract description 165
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- 230000006870 function Effects 0.000 claims description 9
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- 238000013480 data collection Methods 0.000 claims description 3
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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
- B23K20/26—Auxiliary equipment
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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
- B23K20/122—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 using a non-consumable tool, e.g. friction stir welding
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to the technical field of friction welding, in particular to a rotary friction welding main shaft emergency stop device which comprises a main shaft and a four-jaw chuck, wherein the four-jaw chuck is used for clamping and fixing a workpiece to be welded, a base is arranged on one side wall of the four-jaw chuck, a fixed pipe is fixed on the base through a bolt, the main shaft is rotationally connected with the fixed pipe, a locking assembly is arranged on the main shaft, a locking assembly is arranged on the fixed pipe and used for locking and fixing the fixed pipe, a driving mechanism is arranged on the outer side of the fixed pipe and used for driving the locking assembly to lock or unlock, and when the driving mechanism drives the locking assembly to unlock, the locking assembly is synchronously driven to lock and fix the fixed pipe. According to the invention, the free switching between the rotary connection and the fixed connection can be realized between the main shaft and the fixed pipe, so that the main shaft and the motor connected with the main shaft still can keep the rotary function when the workpiece is stationary after the workpiece is welded, and the damage of inertia to the main shaft and the motor is reduced.
Description
Technical Field
The invention relates to the technical field of friction welding, in particular to a main shaft scram device for rotary friction welding.
Background
The rotary friction welding is used for clamping two objects when welding is carried out, one of the objects is rotated at a high speed, friction is generated through relative rotation of the two objects, the end part is melted, the clamped objects are pressed, the two objects are mutually extruded, welding of the objects is achieved, the main shaft is immediately stopped after the welding is finished, the two objects are kept relatively static, and the fact that the connection part of the objects is pulled due to relative movement of the two objects is avoided.
The Chinese patent with the publication number of CN112373044B discloses a vibration friction welding machine, which comprises a machine body and a vibration friction welding device, wherein the inside of the machine body is in a box shape, the bottom of the vibration friction welding device is fixedly connected to the inner wall of the machine body, two sides of the vibration friction welding device are movably connected to the inner wall of the machine body, the vibration friction welding device is used for welding parts, the vibration friction welding device comprises a welding head, a motor, a supporting rod, a base and a corner finishing device, the number of the welding head, the motor and the supporting rod are two, one end of the welding head is movably connected to the inside of the supporting rod, one end of the motor is movably connected to one side of the supporting rod, the bottom of the supporting rod is fixedly connected to the upper surface of a base, the top of the base is fixedly connected to the bottom of the corner finishing device, the lower surface of the base is fixedly connected to the inner wall of the machine body, the supporting rod is positioned at two ends of the base, and the supporting rod can keep the welding head at a certain height so that one of the two supporting rods can fix the welding parts above.
As described in the above application, in the existing friction welding machine, the main shaft is directly fixedly connected with the clamping mechanism (welding head), the motor drives the clamping mechanism to rotate through the main shaft, the workpiece is driven to rotate through the clamping mechanism, and welding is performed, so that the main shaft can stop rotating immediately when welding is completed, and at this time, the main shaft and the motor are damaged by the strong inertia generated when the main shaft rotating at high speed is suddenly stopped.
Disclosure of Invention
In order to solve the problems, the invention provides a main shaft scram device for rotary friction welding.
The invention adopts the following technical scheme that the rotary friction welding main shaft emergency stop device comprises a main shaft and a four-jaw chuck, wherein the four-jaw chuck is used for clamping and fixing a workpiece to be welded, a base is arranged on one side wall of the four-jaw chuck, a fixed pipe is fixed on the base through a bolt, and the main shaft is rotationally connected with the fixed pipe;
the locking device is characterized in that a locking component is arranged on the main shaft and used for locking and fixing the main shaft and the fixed pipe relatively, the locking component is arranged on the fixed pipe and used for locking and fixing the fixed pipe, a driving mechanism is arranged on the outer side of the fixed pipe and used for driving the locking component to lock or unlock, and the locking component is synchronously driven to lock and fix the fixed pipe when the driving mechanism drives the locking component to unlock.
As a further description of the above technical solution, the locking assembly includes a first locking mechanism and a second locking mechanism;
the first locking mechanism comprises a first locking seat sleeved on the outer side of the fixed pipe, a sliding block is welded on the inner wall of the first locking seat, the sliding block is in sliding connection with a first sliding groove formed in the outer wall of the fixed pipe, a spring is welded on one side wall of the sliding block and positioned in the first sliding groove, a plurality of first locking teeth are welded on one side wall, far away from the four-jaw chuck, of the first locking seat, and a plurality of limiting columns distributed in an annular equidistant mode are welded on the outer wall of the first locking seat;
The second locking mechanism comprises a second locking seat welded and fixed on the main shaft, a plurality of second locking teeth are welded on the surface, opposite to the first locking seat, of the second locking seat, and the second locking teeth and the first locking teeth are arranged in a staggered mode.
According to the technical scheme, the driving mechanism comprises an annular seat sleeved on the outer side of the fixed pipe, a second sliding groove is formed in the inner wall of the annular seat along the length direction, a sliding seat is connected in the second sliding groove in a sliding mode, a limiting ring is sleeved in the annular seat and is welded and fixed with the sliding seat, the inner wall of the limiting ring is provided with the annular sliding groove along the circumferential direction, the top end of the limiting column extends into the annular sliding groove, and a driving assembly is arranged on the inner wall of the annular seat and used for driving the limiting ring to move back and forth in the annular seat.
As a further description of the technical scheme, the driving assembly comprises a fixed block, the fixed block is welded and fixed at one end of the inner wall of the annular seat, an electric push rod is fixed on the fixed block, and the movable end of the electric push rod is welded and fixed with the limiting ring.
As a further description of the technical scheme, a fixing seat is welded on the outer wall of the annular seat, and a bolt hole is formed in the fixing seat.
As a further description of the technical scheme, the locking assembly comprises a round table seat and a connecting seat, wherein the round table seat is sleeved on the outer wall of the fixed pipe, the connecting seat is welded and fixed on the outer wall of the sliding seat, and a friction locking block matched with the round table seat for use is fixed on the top end of the connecting seat through bolts.
According to the technical scheme, the four-jaw chuck is characterized in that one end, close to the four-jaw chuck, of the main shaft is welded with a limiting disc, one end of the fixed pipe is provided with an annular groove matched with the limiting disc, an annular boss is arranged on the outer wall of one end of the fixed pipe, and a plurality of fastening bolts are connected to the annular boss in a threaded mode.
As a further description of the above technical solution, the emergency stop control unit is further included, the emergency stop control unit is disposed on the fixing base, and the emergency stop control unit includes:
The data collection module is used for collecting historical friction welding data of the rotary friction welding main shaft, wherein the historical friction welding data of the rotary friction welding main shaft are collected under the condition that the welding of a workpiece reaches the standard, and the historical friction welding data comprise a workpiece welding coefficient, welding control parameters, external environment temperature and friction welding time;
The welding control parameters comprise the rotating speed and the axial pressure of the main shaft;
Parameters affecting the welding coefficient of the workpiece include the thermal conductivity of the workpiece, the hardness of the workpiece and the friction coefficient of the workpiece;
The axial pressure refers to a force applied in the axial direction of two workpieces to be welded;
the friction welding time is the time when the main shaft stops rotating, namely the time required by the two workpieces to be welded to generate heat by mutual friction until the two workpieces are melted and connected together in the friction welding process.
The model training module is used for training a machine learning model for predicting the friction welding time based on the historical friction welding data, collecting the welding coefficient, the welding control parameter and the external environment temperature of the workpiece to be welded in real time, and predicting the friction welding time based on the trained machine learning model;
And the analysis control module controls the driving mechanism to work based on the predicted friction welding time, drives the locking assembly to separate through the driving mechanism, and synchronously drives the locking assembly to lock and fix the fixed pipe.
As a further description of the above technical solution, the expression of the workpiece welding coefficient is:
;
In the formula, Is the welding coefficient of the workpiece, and is the welding coefficient of the workpiece,Is the thermal conductivity of the workpiece and,For the hardness of the workpiece,Is the friction coefficient of the workpiece;、 And Is a weight factor, and、AndAre all greater than 0.
As a further description of the above technical solution, the training method of the machine learning model for predicting the friction welding time includes:
converting the acquired workpiece welding coefficient, welding control parameters and external environment temperature into a corresponding set of characteristic vectors;
and taking each group of feature vectors as input of the machine learning model, taking the friction welding time corresponding to each group of workpiece welding coefficients, welding control parameters and external environment temperature as output, taking the friction welding time actually corresponding to each group of workpiece welding coefficients, welding control parameters and external environment temperature as a prediction target, taking the minimum machine learning model loss function value as a training target, and stopping training when the machine learning model loss function value is smaller than or equal to a preset target loss value.
Advantageous effects
According to the rapid stopping device for the rotary friction welding main shaft, the main shaft and the fixed pipe are relatively locked and fixed through the locking component during welding, the four-jaw chuck can be driven to rotate through the main shaft, so that a workpiece clamped and fixed on the four-jaw chuck is driven to rotate, after welding is completed, the locking component is controlled to unlock, namely the main shaft is in rotational connection with the fixed pipe, namely the main shaft and the fixed pipe can be freely switched in rotational connection and fixed connection, so that after the workpiece is welded, the main shaft and a motor connected with the main shaft can still maintain the rotational function when the workpiece is stationary, the damage of inertia to the main shaft and the motor is reduced, namely the problem that in the prior art, the main shaft is required to stop rotating immediately when welding is completed, and the main shaft and the motor are damaged by strong inertia generated when the main shaft which rotates at high speed is rapidly in rapid stopping is completed at the moment is solved;
Further, when the driving mechanism drives the locking assembly to unlock, the locking assembly is synchronously driven to lock and fix the fixed pipe, so that the quick locking of the fixed pipe is synchronously realized while the unlocking of the locking assembly is realized, the quick braking of the workpiece clamped and fixed on the four-jaw chuck at one end of the fixed pipe is realized, and the phenomenon that the joint of the two objects is pulled due to the relative movement is avoided, so that the welding effect is influenced.
Drawings
The invention is further explained below with reference to the drawings and examples:
FIG. 1 is a schematic structural diagram of a rotational friction welding spindle scram device according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a rotational friction welding spindle scram device according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a split structure of a rotational friction welding spindle scram device according to an embodiment of the present invention;
Fig. 4 is a schematic structural diagram of a first locking mechanism according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a second locking mechanism according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a driving mechanism according to an embodiment of the present invention;
fig. 7 is a schematic structural view of a locking assembly according to an embodiment of the present invention;
fig. 8 is a block diagram of an emergency stop control unit according to an embodiment of the present invention.
The device comprises a main shaft, 101, a limiting disc, 2, a four-jaw chuck, 201, a base, 3, a fixing tube, 301, an annular boss, 302, a fastening bolt, 303, an annular groove, 304, a first sliding groove, 4, a locking assembly, 401, a round platform seat, 402, a connecting seat, 403, a friction locking block, 5, a first locking mechanism, 501, a first locking seat, 502, a sliding block, 503, a spring, 504, a limiting column, 505, a first locking tooth, 6, a second locking mechanism, 601, a second locking seat, 602, a second locking tooth, 7, a driving mechanism, 701, an annular seat, 702, a second sliding groove, 703, a sliding seat, 704, a limiting ring, 705, a fixing block, 706, an electric push rod, 707, a fixing seat, 708, a bolt hole, 709 and an annular sliding groove.
Detailed Description
The application is further described with reference to the following detailed drawings in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the implementation of the application easy to understand. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.
Example 1
Referring to fig. 1-6, an embodiment of the present invention provides a rotational friction welding main shaft emergency stop device, which includes a main shaft 1 and a four-jaw chuck 2, wherein the four-jaw chuck 2 is used for clamping and fixing a workpiece to be welded, a base 201 is arranged on a side wall of the four-jaw chuck 2, a fixing tube 3 is fixed on the base 201 by bolts, and the main shaft 1 is rotationally connected with the fixing tube 3;
The main shaft 1 is provided with a locking component which is used for relatively locking and fixing the main shaft 1 and the fixed pipe 3, the fixed pipe 3 is provided with a locking component 4 which is used for locking and fixing the fixed pipe 3, the outer side of the fixed pipe 3 is provided with a driving mechanism 7 which is used for driving the locking component to lock or unlock, and when the driving mechanism 7 drives the locking component to unlock, the locking component 4 is synchronously driven to lock and fix the fixed pipe 3.
The locking assembly comprises a first locking mechanism 5 and a second locking mechanism 6;
The first locking mechanism 5 comprises a first locking seat 501 sleeved on the outer side of the fixed pipe 3, a sliding block 502 is welded on the inner wall of the first locking seat 501, the sliding block 502 is in sliding connection with a first sliding groove 304 formed in the outer wall of the fixed pipe 3, a spring 503 is welded on one side wall of the sliding block 502, the spring 503 is positioned in the first sliding groove 304, a plurality of first locking teeth 505 are welded on one side wall, far away from the four-jaw chuck 2, of the first locking seat 501, and a plurality of limiting columns 504 distributed in an annular equidistant mode are welded on the outer wall of the first locking seat 501;
The second locking mechanism 6 comprises a second locking seat 601 fixed on the main shaft 1 in a welding way, a plurality of second locking teeth 602 are welded on the surface, opposite to the first locking seat 501, of the second locking seat 601, and the plurality of second locking teeth 602 and the plurality of first locking teeth 505 are arranged in a staggered way.
Specifically, this friction welding main shaft scram device is connected through being provided with fixed pipe 3 between main shaft 1 and four-jaw chuck 2, namely main shaft 1 is connected through fixed pipe 3 and four-jaw chuck 2, and rotate main shaft 1 and the motor that is connected with main shaft 1 and still can keep rotating the function, thereby reduce the harm of inertia to main shaft 1 and motor, in the prior art, need make main shaft 1 stop rotating immediately when welding processing, promptly, carry out relative locking fixedly with main shaft 1 and fixed pipe 3 through locking assembly, alright drive four-jaw chuck 2 rotation through main shaft 1, thereby drive the work piece rotation of clamping fixed on the four-jaw chuck 2, after the welding is accomplished, control locking assembly unblock, even make main shaft 1 and fixed pipe 3 rotate and be connected, make the work piece welding after accomplishing, main shaft 1 and the motor that is connected with main shaft 1 still can keep rotating the function, thereby reduce the harm of inertia to main shaft 1 and motor, in the prior art, overcome the problem that main shaft 1 and motor all produce harm at the powerful inertia that the moment that the high-speed rotation main shaft 1 produced when scram at the time when welding is accomplished.
Example 2
Referring to fig. 1-3 and fig. 6-7, the present embodiment further discloses a structure of a locking assembly 4 based on the above embodiment, the locking assembly 4 includes a circular stand 401 and a connecting seat 402, the circular stand 401 is sleeved on the outer wall of the fixed tube 3, the connecting seat 402 is welded and fixed on the outer wall of the sliding seat 703, and a friction locking block 403 matched with the circular stand 401 is fixed on the top end of the connecting seat 402 by bolts.
One end of the main shaft 1, which is close to the four-jaw chuck 2, is welded with a limiting disc 101, one end of the fixed pipe 3 is provided with an annular groove 303 matched with the limiting disc 101, an annular boss 301 is arranged on the outer wall of one end of the fixed pipe 3, and a plurality of fastening bolts 302 are connected to the annular boss 301 in a threaded manner.
Specifically, on the basis of embodiment 1, when the driving mechanism 7 drives the locking assembly to unlock, the locking assembly 4 is synchronously driven to lock and fix the fixed pipe 3, namely, after welding is completed, the locking assembly is controlled to unlock, namely, the main shaft 1 is rotationally connected with the fixed pipe 3, the friction locking block 403 is synchronously driven to move, the friction locking block 403 is extruded on the round platform 401, and the friction force between the friction locking block 403 and the round platform 401 forces the fixed pipe 3 to rapidly stop rotating, so that the aim of rapidly braking a workpiece is achieved.
Example 3
Referring to fig. 1-3 and fig. 6-7, the specific structure of the driving mechanism 7 is further disclosed in this embodiment based on the above embodiment, the driving mechanism 7 includes an annular seat 701 sleeved outside the fixed tube 3, a second sliding groove 702 is provided on an inner wall of the annular seat 701 along a length direction, a sliding seat 703 is slidably connected to the second sliding groove 702, a limiting ring 704 is sleeved in the annular seat 701, the limiting ring 704 and the sliding seat 703 are welded and fixed to each other, an annular sliding groove 709 is provided on an inner wall of the limiting ring 704 along a circumferential direction thereof, a top end of the limiting post 504 extends into the annular sliding groove 709, and a driving component is provided on an inner wall of the annular seat 701 for driving the limiting ring 704 to move back and forth in the annular seat 701.
The driving assembly comprises a fixed block 705, wherein the fixed block 705 is welded and fixed at one end of the inner wall of the annular seat 701, an electric push rod 706 is fixed on the fixed block 705, and the movable end of the electric push rod 706 is welded and fixed with the limiting ring 704.
A fixing seat 707 is welded on the outer wall of the annular seat 701, and a bolt hole 708 is formed in the fixing seat 707.
Specifically, a driving mechanism 7 is arranged on the outer side of the fixed pipe 3 and used for driving the locking assembly to lock or unlock, and when the driving mechanism 7 drives the locking assembly to unlock, the locking assembly 4 is synchronously driven to lock and fix the fixed pipe 3;
When the driving mechanism 7 drives the locking assembly to unlock, the locking assembly 4 is synchronously driven to lock and fix the fixed pipe 3, namely, after welding is completed, the electric push rod 706 is controlled to stretch at the moment, the limiting ring 704 is pushed to move towards the four-jaw chuck 2, the limiting ring 704 drives the first locking seat 501 to move towards the four-jaw chuck 2 through the limiting post 504, so that the first locking teeth 505 on the first locking seat 501 are separated from the second locking teeth 602 on the second locking seat 601, namely, unlocking of the locking assembly is realized, at the moment, the spindle 1 is rotationally connected with the fixed pipe 3, namely, the spindle 1 can not drive the fixed pipe 3 to rotate any more, and when the limiting ring 704 moves, the sliding seat 703 is synchronously driven to move, the friction locking block 403 is synchronously driven to move by the movement of the sliding seat 703 to be extruded on the round seat 401, and the friction force between the friction locking block 403 and the round seat 401 forces the fixed pipe 3 to stop rotating rapidly, so that the aim of rapidly braking a workpiece is achieved.
In summary, when the driving mechanism 7 drives the locking assembly to unlock, the locking assembly 4 is synchronously driven to lock and fix the fixed pipe 3, so that the locking assembly unlock is realized, the quick locking of the fixed pipe 3 is synchronously realized, the quick braking of the workpiece clamped and fixed on the four-jaw chuck 2 at one end of the fixed pipe 3 is realized, and the phenomenon that the connection part of the two objects is pulled due to relative movement is avoided, so that the welding effect is influenced.
Example 4
Referring to fig. 1-3 and 8, the system further includes a scram control unit, the scram control unit is disposed on the fixing seat 707, and the scram control unit includes:
The data collection module is used for collecting historical friction welding data of the rotary friction welding main shaft, wherein the historical friction welding data of the rotary friction welding main shaft are collected under the condition that the welding of a workpiece reaches the standard, and the historical friction welding data comprise a workpiece welding coefficient, welding control parameters, external environment temperature and friction welding time;
the welding control parameters comprise the rotating speed and the axial pressure of the main shaft 1;
Parameters affecting the welding coefficient of the workpiece include the thermal conductivity of the workpiece, the hardness of the workpiece, and the friction coefficient of the workpiece;
the axial pressure refers to a force applied in the axial direction of the two workpieces to be welded;
The friction welding time is the time during which the rotation of the main shaft 1 is stopped, that is, the time required for two workpieces to be welded to rub against each other to generate heat until they are melted and joined together during the friction welding.
The model training module is used for training a machine learning model for predicting the friction welding time based on the historical friction welding data, collecting the welding coefficient, the welding control parameter and the external environment temperature of the workpiece to be welded in real time, and predicting the friction welding time based on the trained machine learning model;
And the analysis control module controls the driving mechanism 7 to work based on the predicted friction welding time, and drives the locking assembly to separate through the driving mechanism 7 so as to synchronously drive the locking assembly 4 to lock and fix the fixed pipe 3.
The expression of the workpiece welding coefficient is:
;
In the formula, Is the welding coefficient of the workpiece, and is the welding coefficient of the workpiece,Is the thermal conductivity of the workpiece and,For the hardness of the workpiece,Is the friction coefficient of the workpiece;、 And Is a weight factor, and、AndAre all greater than 0.
It should be noted that the size of the weight coefficient is a specific numerical value obtained by quantizing each data, so that the subsequent comparison is convenient, and the size of the weight coefficient depends on the number of the comprehensive parameters and the corresponding weight coefficient is preliminarily set for each group of comprehensive parameters by a person skilled in the art.
It should be noted that the larger the workpiece welding coefficient, the shorter the friction welding time of the workpiece, conversely, the larger the thermal conductivity of the workpiece, the longer the friction welding time of the workpiece, and conversely, because the material with high thermal conductivity dissipates heat faster, and thus may require longer friction time to reach the required temperature, the larger the hardness of the workpiece, the longer the friction welding time of the workpiece, conversely, because the material with higher hardness generally requires longer time to generate sufficient friction heat to complete the welding, the larger the friction coefficient of the workpiece, the shorter the friction welding time of the workpiece, conversely, because the material with higher friction coefficient generates heat faster, thereby reducing the friction welding time.
It should be noted that the thermal conductivity, hardness and friction coefficient of the workpiece can be obtained through experiments, and not described herein too much, wherein the thermal conductivity can be obtained through a steady state method, that is, by maintaining a constant temperature difference at both ends of the material, measuring the heat flow rate, the hardness can be obtained through the brinell hardness, that is, by pressing a hard ball with a certain diameter into the surface of the material under a certain load, measuring the indentation diameter, and the friction coefficient can be obtained by using standard equipment such as a universal frictional wear tester, and testing according to a standard method (such as ASTM D1894 or ISO 8295), and directly measuring the friction coefficient.
The training method of the machine learning model for predicting the friction welding time comprises the following steps:
converting the acquired workpiece welding coefficient, welding control parameters and external environment temperature into a corresponding set of characteristic vectors;
And taking each group of feature vectors as input of a machine learning model, taking the friction welding time corresponding to each group of workpiece welding coefficients, welding control parameters and external environment temperature as output of the machine learning model, taking the friction welding time actually corresponding to each group of workpiece welding coefficients, welding control parameters and external environment temperature as a prediction target, taking a minimum machine learning model loss function value as a training target, and stopping training when the machine learning model loss function value is smaller than or equal to a preset target loss value.
The machine learning model can be one of a support vector machine regression model, a random forest regression model, a neural network regression model and the like.
In the machine learning model, the calculation formula of the prediction error is as follows: Wherein, the method comprises the steps of, wherein, For the number of the feature data,In order to predict the error of the signal,Is the firstThe predicted state value corresponding to the group characteristic data,Is the firstAnd the actual state value corresponding to the group training data is the friction welding time.
Specifically, be provided with scram control unit, through gathering the historical friction welding data of rotatory friction welding main shaft, based on the machine learning model of historical friction welding data training out prediction friction welding time, work piece welding coefficient of waiting to weld, welding control parameter and external environment temperature are gathered in real time, predict out friction welding time based on the machine learning model that training is accomplished, work based on the prediction welding time control actuating mechanism 7, drive locking subassembly separation through actuating mechanism 7, synchronous drive locking subassembly 4 is fixed to fixed pipe 3, the automatic friction welding time that has generated based on work piece welding coefficient, welding control parameter and external environment temperature has been realized promptly, need not to rely on artificial experience control, ensure the best balance of welding quality and efficiency.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the foregoing embodiments, and that the foregoing embodiments and description are merely illustrative of the principles of this invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, and these changes and modifications fall within the scope of the invention as hereinafter claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
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| CN202411366274.2A CN118875463B (en) | 2024-09-29 | 2024-09-29 | A kind of emergency stop device for rotating friction welding spindle |
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| CN202411366274.2A CN118875463B (en) | 2024-09-29 | 2024-09-29 | A kind of emergency stop device for rotating friction welding spindle |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101972892A (en) * | 2010-10-28 | 2011-02-16 | 西北工业大学 | Multifunctional friction welding table |
| CN110977142A (en) * | 2019-12-20 | 2020-04-10 | 辽宁工程技术大学 | An impact friction stir welding device for the connection of magnesium-aluminum alloy dissimilar workpieces |
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