CN112958894B

CN112958894B - Rotor spot welding process

Info

Publication number: CN112958894B
Application number: CN202110176731.1A
Authority: CN
Inventors: 周建章; 周兵
Original assignee: Chongqing Baoyou Electromechanical Co ltd
Current assignee: Chongqing Baoyou Electromechanical Co ltd
Priority date: 2021-02-07
Filing date: 2021-02-07
Publication date: 2023-03-10
Anticipated expiration: 2041-02-07
Also published as: CN112958894A

Abstract

The invention relates to the technical field of pipe fitting upper caps, and particularly discloses a rotor spot welding process, which comprises the following steps of 1: placing a rotor into a conveying mechanism; step 2, transmission: conveying the rotor to a jacking mechanism by using the conveying mechanism in the step 1; step 3, jacking: lifting the rotor to a spot welding position by using the lifting mechanism in the step 2; step 4, positioning: the positioning mechanism fixes the rotor in the jacking mechanism; step 5, spot welding: the rotor lamination spot welding device further comprises a welding head for spot welding, and the welding head is used for carrying out spot welding on the rotor lamination; step 6, replacing materials: and resetting the positioning mechanism and the jacking mechanism to enable the rotor subjected to spot welding to fall into the conveying mechanism, conveying the next rotor which is not subjected to spot welding into the jacking mechanism by the conveying mechanism, and repeating the steps 2 to 5 for processing. The invention aims to provide a rotor spot welding process to solve the technical problem of low efficiency of the process of plugging a cap by a pipe fitting.

Description

Rotor spot welding process

Technical Field

The invention relates to the technical field of motor rotor welding, and particularly discloses a rotor spot welding process.

Background

The rotor is a rotating part of the generator and is an important component of the generator. The yoke of the rotor is usually made of a plurality of steel plate laminations which are stacked and then fixed by a plurality of axial welds along the circumferential direction of the rotor laminations.

At present, a common method for welding rotor laminations is to manually use a welding gun to weld for multiple times, and after one welding is finished, the welding gun needs to rotate a specific angle to weld the next time until the welding is finished. The welding method has low welding efficiency, and the welding quality is unstable during manual operation, so that the requirement of mass production is difficult to meet.

Disclosure of Invention

The invention aims to provide a rotor spot welding process to solve the technical problem that the operation steps of the rotor spot welding process are complicated.

In order to achieve the purpose, the basic scheme of the invention is as follows: the rotor spot welding process is characterized by comprising the following steps of:

step 1, feeding: placing a rotor into a conveying mechanism;

step 2, transmission: conveying the rotor to a jacking mechanism by using the conveying mechanism in the step 1;

step 3, jacking: lifting the rotor to a spot welding position by using the lifting mechanism in the step 2;

step 4, positioning: the positioning mechanism fixes the rotor in the jacking mechanism;

step 5, spot welding: the welding head is used for carrying out spot welding on the lamination of the rotor;

step 6, replacing materials: and resetting the positioning mechanism and the jacking mechanism to enable the rotor subjected to spot welding to fall into the conveying mechanism, conveying the next rotor which is not subjected to spot welding into the jacking mechanism by the conveying mechanism, and repeating the steps 2 to 5 for processing.

The working principle and the beneficial effects of the basic scheme are as follows: compare with current rotor spot welding technology, in this scheme, utilize conveying mechanism to carry the rotor, utilize climbing mechanism to realize breaking away from the rotor from conveying mechanism and carry to soldered connection department, utilize positioning mechanism to press from both sides tight fixed to the rotor, improve the stability of carrying out the spot welding in-process to the rotor, utilize the soldered connection to carry out the spot welding to the rotor, and finally utilize positioning mechanism, climbing mechanism and conveying mechanism reset, the rotor that makes the spot welding accomplish can in time discharge, and in time carry out the pay-off to the rotor that does not weld in step, thereby rotor welding continuous processing's welding efficiency has greatly been improved, the welded time cost has effectively been shortened, practical manual operation step has been simplified, reduce the manual manufacturing cost.

Further, the conveying mechanism in the step 1 comprises two groups of conveying chains, the two groups of conveying chains are arranged in parallel, and the first telescopic mechanism is arranged right below a gap between the two groups of conveying chains.

Has the beneficial effects that: this technical scheme is through setting up the conveying chain of two parallels to the realization supports the axial both ends of rotor. Simultaneously can also utilize the clearance between two parallel conveying chains are adjacent to realize holding first telescopic machanism, and first telescopic machanism's flexible end can conflict to the bottom of rotor through the clearance between two conveying chains to realize the technical effect that the lower mould lifted the rotor.

Further, a plurality of support seats are arranged on each group of conveying chains along the circumferential direction, and third grooves used for supporting the end portions of the rotors are formed in the support seats.

Has the beneficial effects that: this technical scheme is through addding the support seat to the effect of rotor shaft end cooperation support is realized. And a third groove is formed in the bracket seat, so that the end part of the rotor is stably supported.

Further, in step 2 climbing mechanism includes the workstation, the workstation lateral wall is fixed with the mould, open the bottom of going up the mould has first recess, workstation lateral wall fixedly connected with is used for carrying the conveying mechanism of rotor, be equipped with vertical flexible first telescopic machanism under conveying mechanism, first telescopic machanism's free end fixedly connected with is used for with last mould complex lower mould, open the top of lower mould has the second recess, the space that first recess and second recess formed can hold the space of rotor.

Has the advantages that: this technical scheme utilizes first telescopic machanism to carry out the ascending propelling movement of vertical side through setting up in order to realize carrying out the rotor under conveying mechanism. In the process that the first telescopic mechanism extends upwards, the lower die at the end part of the first telescopic mechanism jacks up the rotor, and then the lower die is enabled to realize the technical effect of supporting and bearing. The second recess of lower mould realizes holding the rotor, effectively avoids the rotor to take place from the lower mould condition of droing. At the in-process of first flexible jack-up lower mould, the lower membrane can be with the inconsistent cooperation of upper die, and then makes first recess and second recess form a complete space and be used for holding the rotor. The rotor is offset behind driving motor, and driving motor drives the rotor and carries out intermittent type and rotates, makes the rotor rotate in the space that first recess and second recess formed. And after the rotor rotates for a certain angle, the welding head welds the laminations of the rotor. After the welding is completed, the shrinkage of the first telescopic mechanism enables the rotor to fall into the conveying mechanism again, and the function of discharging the rotor is achieved.

Furthermore, the workbench is also fixedly connected with a second telescopic mechanism which is horizontally telescopic, and the telescopic end of the second telescopic mechanism is matched with the end part of the rotor.

Has the advantages that: the rotor is lifted by the first telescopic mechanism and then is positioned on the same horizontal plane with the second telescopic mechanism, and then the second telescopic mechanism which is horizontally telescopic is utilized to extend, so that the telescopic end of the second telescopic mechanism is abutted against the end part of the rotor, and the rotor is pushed to be close to the driving motor.

Furthermore, the workstation top is fixed with the loading board, it has the slide to open on the loading board, the slide extending direction is on a parallel with the driving motor axial, sliding connection has the backup pad on the slide, second telescopic machanism fixed connection in the backup pad lateral wall.

Has the advantages that: this technical scheme is through seting up the slide on the loading board to in the realization backup pad is in the ascending free slip of horizontal direction, and then the realization is adjusted the second telescopic machanism position, in order to freely select the position of fixed second telescopic machanism according to the axial length of rotor.

Further, the supporting plate is perpendicular to the bearing plate.

Has the beneficial effects that: this technical scheme is through injecing the position vertical relation of backup pad and loading board to the realization is to the stable support of second telescopic machanism.

Further, the slide is the bar slide.

Has the advantages that: this technical scheme is through the slide that adopts bar structure to in the free slip of realization backup pad.

Furthermore, the left side and the right side of the lower die of the workbench are respectively fixed with a third telescopic mechanism, and a support block matched with the side wall of the lower die is fixed at the telescopic end of the third telescopic mechanism.

Has the advantages that: this technical scheme is through addding third telescopic machanism to realize pressing from both sides tightly fixedly to the lower mould, effectively improve the stability that the lower mould supported the rotor process.

Furthermore, the side wall of the workbench is fixedly connected with a positioning rod, a positioning block is fixed at the free end of the positioning rod and is positioned at the output shaft of the driving motor, and the end part of the positioning block can be abutted to the gap between adjacent laminations of the rotor.

Has the advantages that: this technical scheme utilizes the locating piece of locating lever so that insert the clearance department to the adjacent lamination of rotor, and every time driving motor rotates, the locating piece alright in order to insert the clearance to the adjacent lamination of next rotor, and then makes a gasket position department of waiting to weld towards the soldered connection. Through the clearance grafting cooperation of the adjacent lamination of locating piece and rotor, reach the technological effect of rotation angle location, ensure that the angle of rotor every turn all keeps unanimous.

Drawings

FIG. 1 is a schematic cross-sectional side view of a rotor spot welding apparatus according to an embodiment of the present invention;

fig. 2 isbase:Sub>A schematic cross-sectional view taken atbase:Sub>A-base:Sub>A in fig. 1.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises a workbench 1, a servo motor 2, a matching block 3, a welding head 4, an upper die 5, a first groove 6, a lower die 7, a second groove 8, an air pump 9, an air duct 10, a conveying chain 11, a bracket base 12, a third groove 13, a first telescopic air cylinder 14, a bearing plate 15, a slide way 16, a supporting plate 17, a third telescopic air cylinder 18 and a resisting block 19.

Basically, the rotor spot welding process comprises the following steps:

step 1, feeding: placing the rotor into a conveying mechanism;

and step 2, transmission: conveying the rotor to a jacking mechanism by using the conveying mechanism in the step 1;

As shown in attached

drawings

1 and 2, the rotor spot welding process is applied to a workbench, a servo motor 2 is fixed on the bottom of the workbench 1 through bolts, a driving shaft of the servo motor 2 is parallel to a horizontal plane, a matching block 3 is fixed on the driving shaft of the servo motor 2 through coaxial key connection, and a key groove matched with the shaft end of a rotor is formed in the end portion of the matching block 3.

The top of the working table 1 is also fixed with a welding head 4, the welding head 4 faces vertically to the right lower side, and the welding head 4 is positioned above the matching block 3. An upper die 5 is further welded and fixed to the top of the workbench 1, a first groove 6 is formed in the bottom of the upper die 5, and the longitudinal section of the first groove 6 is of a semicircular structure. The axis of the first groove 6 is coaxial with the rotation axis of the servo motor 2. The top of the workbench 1 is also fixedly connected with an air pump 9 through bolts, the output end of the air pump 9 is fixedly connected with an air duct 10, and the air duct 10 can be freely bent and fixed at any posture. The output end of the gas guide tube 10 faces the bottom of the welding head 4.

The lateral wall of workstation 1 is equipped with conveying mechanism, and conveying mechanism includes two conveying chain 11 that the structure is the same, and every conveying chain 11 is closed loop construction, and every conveying chain 11 has a plurality of support frame bases 12 along circumference equidistant array, and the third recess 13 that is used for supporting the rotor tip is seted up on the top of every support frame base 12. A first vertical telescopic cylinder 14 is fixed under the space between the two conveying chains 11 through a bolt, a telescopic end of the first telescopic mechanism is fixedly connected with a lower die 7 in a welding mode, a second groove 8 is formed in the top of the lower die 7, and the structure of the second groove 8 is symmetrical to that of the first groove 6. The cavity formed by butting the first groove 6 and the second groove 8 is a cylindrical cavity, and the cavity formed by butting the first groove 6 and the second groove 8 is coaxial with the servo motor 2.

A bearing plate 15 is fixed on the top of the workbench 1 at one side of the conveying chain 11 far away from the servo motor 2 through a bolt, two mutually parallel slideways 16 are formed in the top of the bearing plate 15, and the extending direction of the slideways 16 is parallel to the axial direction of the servo motor 2. The supporting plate 17 is connected to the slide way 16 of the bearing plate 15 in a sliding manner, the supporting plate 17 is fixedly connected with a second telescopic cylinder 20 through a bolt, the second telescopic cylinder 20 freely stretches along the horizontal direction, and a push plate matched with the end of the rotor is fixedly connected to the telescopic end key of the second telescopic cylinder 20.

The left side and the right side of the lower die 7 of the workbench 1 are respectively provided with a third telescopic cylinder 18 through bolts, the telescopic direction of the third telescopic cylinder 18 is parallel to the horizontal plane, the telescopic end of each third telescopic cylinder 18 is fixedly connected with a supporting block 19, and the outer wall of each supporting block 19 is matched with the side wall of the lower die 7. The side wall of the workbench 1 is fixedly connected with a positioning rod 21, a positioning block 22 is fixed at the free end of the positioning rod 21, the positioning block 22 is located on the right side of the output shaft of the servo motor 2, the positioning block 22 is of a sheet plate structure, and the end part of the positioning block 22 is flexible and can be inserted into a gap between adjacent laminations of the rotor in a butting mode.

The specific implementation process is as follows: firstly, an operator places the rotors on the support bases 12 of the conveying chain 11 in sequence, wherein the two axial ends of the rotors are respectively placed in the third grooves 13 of the support bases 12. Then, the operator starts the conveying chain 11 to rotate, and the rotor horizontally moves from right to left under the action of the rotation of the conveying chain 11. When the rotor removed to first telescopic cylinder 14 directly over, operating personnel stopped the rotation of conveying chain 11 to start first telescopic cylinder 14 and upwards stretch out and draw back, because first telescopic cylinder 14 is located between the conveying chain 11 of two parallels, consequently at the vertical in-process that upwards stretches out and draws back of first telescopic cylinder 14, the lower mould 7 of the flexible end of first telescopic cylinder 14 was with the rotor jack-up from up down, the in-process rotor at the jack-up fell into in the second recess 8 of lower mould 7. Along with the continuous rising of first telescopic cylinder 14, the rotor leaves the supporting seat and gets close to upper die 5, until the top of lower mould 7 supports against the top of upper die 5. The top of the rotor in this state enters the first groove 6, and the first groove 6 and the second groove 8 buckle the rotor in the space.

Then the operator starts the second telescopic cylinder 20, the push plate at the telescopic end of the second telescopic cylinder 20 extends towards the direction close to the rotor until abutting against the end part of the rotor, and the push plate pushes the end part of the rotor into the key groove of the servo motor 2 along with the continuous extension of the second telescopic cylinder 20. And then, starting the two third telescopic cylinders 18, wherein the third telescopic cylinders 18 extend to the position close to the lower die 7 until the abutting blocks 19 of the third telescopic cylinders 18 abut against the outer wall of the lower die 7. The welding head 4 is then activated to spot weld the outer wall of the rotor. After welding is finished at one position, the servo motor 2 is started, the servo motor 2 drives the rotor to synchronously rotate until the rotor rotates to the next position in the circumferential direction, and the welding head 4 is enabled to continue to perform spot welding. Each time the servomotor 2 is rotated, the positioning block 22 can be inserted into the gap between adjacent laminations of the next rotor, thereby positioning a pad to be welded toward the welding head 4. After the complete welding is completed, an operator controls the second telescopic cylinder 20 and the third telescopic cylinder 18 to retract in sequence, the first telescopic cylinder 14 is started to descend after the retraction is completed, and the rotor moves downwards along with the lower die 7 under the action of gravity until the rotor falls into the third groove 13 of the support base 12 again. Finally, the operator controls the conveying chain 11 to rotate continuously, conveys the welded rotor away from the first telescopic cylinder 14, and conveys the next rotor to be welded to a position right above the telescopic end of the first telescopic cylinder 14.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be defined by the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. The rotor spot welding process is characterized in that the process is applied to a workbench, a servo motor is fixed on the bottom of the workbench through a bolt, a driving shaft of the servo motor is parallel to the horizontal plane, a matching block is fixedly connected with the driving shaft of the servo motor through a coaxial key, a key groove matched with the shaft end of a rotor is formed in the end portion of the matching block, an upper die is further fixedly welded on the top of the workbench, a first groove is formed in the bottom of the upper die, the longitudinal section of the first groove is of a semicircular structure, the axis of the first groove is coaxial with the rotating shaft of the servo motor, a conveying mechanism is arranged on the side wall of the workbench, a vertically telescopic first telescopic cylinder is fixed below the conveying mechanism through a bolt, a telescopic end of the first telescopic mechanism is fixedly welded to a lower die, a second groove is formed in the top of the lower die, the structure of the second groove is mutually symmetrical with the first groove, a cavity formed by butting of the first groove and the second groove is a cylindrical structure cavity, a cavity formed by butting the first groove and the second groove is coaxial with the servo motor, a bearing plate is fixed on the top of the workbench by bolts at one side of the conveying chain away from the servo motor, two mutually parallel slideways are formed on the top of the bearing plate, the extending direction of the slideways is parallel to the axial direction of the servo motor, a supporting plate is connected on the slideways of the bearing plate in a sliding manner, a second telescopic cylinder is fixedly connected on the supporting plate by bolts and freely stretches along the horizontal direction, a push plate used for matching the end part of the rotor is fixedly connected on the telescopic end key of the second telescopic cylinder, third telescopic cylinders are respectively fixed on the left side and the right side of the lower die of the workbench by bolts, the stretching direction of the telescopic ends of the third telescopic cylinders is parallel to the horizontal plane, abutting blocks are fixedly connected on the telescopic ends of all the third telescopic cylinders, and the outer walls of the abutting blocks are matched with the side walls of the lower die, the side wall of the workbench is fixedly connected with a positioning rod, a positioning block is fixed at the free end of the positioning rod and is positioned on the horizontal right side of the output shaft of the servo motor, the positioning block is of a sheet plate structure, and the end part of the positioning block is flexible and can be inserted into a gap between adjacent laminations of the rotor in a butting mode;

the method comprises the following steps:

step 1, feeding: placing the rotor into a conveying mechanism; the conveying mechanism comprises two groups of conveying chains, the two groups of conveying chains are arranged in parallel, and the first telescopic mechanism is arranged right below a gap between the two groups of conveying chains;

step 4, positioning: the positioning mechanism fixes the rotor in the jacking mechanism; the first telescopic cylinder ascends, the rotor leaves the supporting seat and approaches the upper die until the top end of the lower die abuts against the top end of the upper die, the top of the rotor in the state enters the first groove, the first groove and the second groove buckle the rotor in the space, then the second telescopic cylinder is started, a push plate at the telescopic end of the second telescopic cylinder extends towards the direction close to the rotor until the top of the rotor abuts against the end of the rotor, the push plate pushes the end of the rotor into a key groove of a servo motor along with the continuous extension of the second telescopic cylinder, then two third telescopic cylinders are started, and the third telescopic cylinders extend towards the position close to the lower die until abutting blocks of the third telescopic cylinders abut against the outer wall of the lower die;

step 5, spot welding: the welding head is used for carrying out spot welding on the lamination of the rotor; after one position is welded, starting a servo motor, driving the rotor to synchronously rotate by the servo motor until the rotor is circumferentially rotated to the next position, and continuously performing spot welding on a welding head;

step 6, replacing materials: and resetting the positioning mechanism and the jacking mechanism to enable the spot-welded rotor to fall into the conveying mechanism, conveying the next non-spot-welded rotor into the jacking mechanism by the conveying mechanism, and repeating the steps 2 to 5 for processing.

2. The rotor spot welding process according to claim 1, characterized in that: and a plurality of support seats are arranged on each group of conveying chains along the circumferential direction, and third grooves for supporting the end parts of the rotors are formed in the support seats.