Beveled stator welding tool

Abstract

The present invention relates to a beveled-piece stator welding tool, including a base, a lifting platform, an internal expansion mechanism, and a downward pressing mechanism. There are multiple guide pillars above the base, and the inner sides of the guide pillars are on a circumference; the lifting platform is above the base, and the guide pillars pass through the lifting platform; an inner support is installed on the base, and an annular insertion space is formed between the outer periphery of the inner support, the upper side of the lifting platform, and the inner side of the guide pillars; an inclined mechanism is provided outside the inner support; an expansion block is provided outside the inner support, and an internal expansion mechanism is provided inside the inner support; the downward pressing mechanism presses down the stator punchings stacked in the insertion space. The present invention can ensure that an oblique weld is formed between the stator punchings placed in the insertion space through the inclined mechanism, and can ensure that there is a torsion angle between the stator punchings; the stator punchings placed in the space can be pushed to be neat through the cooperation of the internal expansion mechanism and the guide pillars; and the downward pressing mechanism can ensure that the upper and lower adjacent stator punchings are closely fitted during welding, thereby improving the welding quality.

Description

Technical Field

[0001] The invention relates to an inclined-piece stator welding tool. Background Art

[0002] The motor stator is welded together by stacking multiple stator punchings. Each stator punching has a welding groove on the outside. When welding, the stator punchings to be welded are placed in the tooling, and then welded by manual or automatic welding machines. At present, the welding grooves on the outside of most stator punchings are straight welds, and the welding grooves on the upper and lower stator punchings are in a straight line. According to customer requirements, the stator punchings need to be twisted at a certain angle, and the current tooling can hardly meet this welding requirement. Summary of the invention

[0003] In view of the above problems, an object of the present invention is to provide a bevel-piece stator welding tool with a reasonable structure and capable of ensuring accurate assembly of stator punching sheets.

[0004] The technical solution for implementing the present invention is as follows

[0005] The inclined-slice stator welding tool comprises a base, a lifting platform, an inner expansion mechanism, and a downward pressing mechanism. The base is placed horizontally, and a plurality of guide pillars are arranged vertically at intervals along the outer periphery above the base, and the inner sides of the plurality of guide pillars are on a circle.

[0006] The lifting platform is annular and is located above the base. The guide column passes through the lifting platform, and the lifting platform moves up and down along the travel of the guide column.

[0007] An inner support with a hollow interior is fixedly mounted in the middle of the base, and an annular insertion space for stacking and placing stator punching sheets is formed between the outer periphery of the inner support, the top of the lifting platform, and the inner side of the guide column;

[0008] An oblique mechanism is arranged outside the inner support so that when the stator punching sheets are stacked and placed in the insertion space, the welding grooves at corresponding positions on the outer sides of the upper and lower adjacent stator punching sheets form an obliquely arranged weld bead;

[0009] At least one expansion block is arranged outside the inner support, and an inner expansion mechanism is arranged inside the inner support to drive the expansion block to push outward to expand and align the inner side of the stator punching sheet or to retract it to the inner side;

[0010] The pressing mechanism presses down the stacked stator punching sheets in the insertion space from top to bottom from above the insertion space.

[0011] Furthermore, the internal expansion mechanism includes an expansion block pushing mechanism and a driving mechanism for driving the expansion block pushing mechanism to move;

[0012] The inner support is a circular ring body with an internal cavity, and a mounting surface for mounting the expansion block is cut out on the outer periphery of the inner support. The mounting surface is a vertical surface arranged axially along the circumference of the inner support, and the expansion block is arranged along the axial direction of the inner support;

[0013] The expansion block pushing mechanism is arranged in the inner support, driving the expansion block to push outward to expand and align the inner side of the stacked stator punching sheets placed in the space;

[0014] A reset mechanism is arranged between the inner support and the expansion block, which drives the expansion block to retract toward the inner support after the expansion block pushing mechanism loses the outward expansion force on the expansion block, so as to separate the expansion block from the inner side of the stator punching sheet.

[0015] Furthermore, the expansion block pushing mechanism includes a pushing sleeve and a pushing wedge block;

[0016] The push sleeve is in the inner support, and the driving mechanism drives the push sleeve to move up and down in the vertical direction of the inner support; a wedge groove concave inwardly is arranged on the outer periphery of the push sleeve;

[0017] An assembly hole is opened in the radial direction of the inner support, and the assembly hole connects the outside and the inside of the inner support. The push wedge block is placed in the assembly hole, and the outer end of the push wedge block cooperates with the inner side of the expansion block, and the inner end of the push wedge block cooperates with the outer wall of the push sleeve; the push sleeve drives the push wedge block to push the expansion block outward to expand; the wedge groove is used for the inner end of the push wedge block to make way for the expansion block to retract toward the inward support.

[0018] An upper limit piece is fixedly mounted on the upper side of the push sleeve and cooperates with the upper side of the inner support to limit the downward stroke of the push sleeve. An inner increase block is mounted below the push sleeve and is connected to the driving mechanism.

[0019] Furthermore, the driving mechanism includes a driving rod and an upper reset member, the upper end of the driving rod is connected to the inner increase block, the lower end of the driving rod passes through the base and extends downward, and as the driving end, the lower end of the driving rod is provided with a driving slot; the upper reset member is provided between the lower surface of the inner increase block and the upper surface of the base, and is compressed by the two to store energy;

[0020] An annular support platform is fixedly arranged in the middle below the base, and the support platform is fixedly assembled on a transfer platform which moves back and forth in a horizontal direction. A lower limit piece is arranged in the support platform, and the lower end portion of the driving rod is arranged on a limit portion which cooperates with the lower limit piece to limit the rising stroke of the driving rod.

[0021] Furthermore, the reset mechanism includes a reset elastic member and a connecting member. A step hole penetrating the inner and outer sides of the expanding block is opened in the expanding block. The front end of the connecting member is a connecting end, and the rear end of the connecting member is a limiting end. The front end of the connecting member passes through the step hole from the outer side of the expanding block and is connected to the inner support so that the expanding block is assembled outside the inner support. The reset elastic member is placed in the step hole and is compressed by the step surface of the step hole and the limiting end of the connecting member.

[0022] When the expansion block pushing mechanism drives the expansion block to push outward, the reset elastic member is compressed and stores energy. After the inner expansion pushing mechanism loses the outward supporting force on the expansion block, the reset elastic member pushes the expansion block to retract in the inward supporting direction.

[0023] Furthermore, the expansion block includes an expansion block body vertically assembled on the assembly surface, an obliquely arranged assembly groove is opened on the outer side of the expansion block body, an expansion bar inserted into the inner notch of the stator punching sheet is fixedly installed in the assembly groove, and the expansion bar is exposed from the assembly groove.

[0024] Furthermore, the inclined mechanism includes an assembly block and an inclined bar, an installation groove is opened outside the inner support along the axial direction, the installation groove passes through the upper and lower surfaces of the inner support, the upper groove size of the installation groove is larger than the lower groove size, and the assembly block is inserted into the installation groove from top to bottom; a limiting structure is provided between the assembly block and the installation groove to limit the radial movement of the assembly block along the inner support after the assembly block is inserted into the installation groove;

[0025] A positioning block is fixedly arranged on the base, a positioning hole is opened on the positioning block, and a plug-in unit is fixedly arranged on the lower end surface of the assembly block, and the plug-in unit is inserted into the positioning hole.

[0026] Furthermore, the pressing mechanism comprises an annular pressing template located just above the insertion space, and the pressing template is pressed down above the stator punching sheet in the insertion space;

[0027] An extension portion is extended outwardly from the outer circumference of the lower pressing template and cooperates with the upper end surface of the guide column to form a limit for the lower pressing stroke of the lower pressing template.

[0028] The above technical solution is adopted. When in use, the stator punching sheets are stacked one by one and placed in the placement space. After the stator punching sheets are placed, the welding grooves on the outer sides of the stator punching sheets form oblique welds; the welding tool is pushed to the bottom of the welding machine, and the pulling end of the pull-down mechanism is inserted into the driving groove at the lower end of the driving rod, driving the driving rod to move downward, thereby pushing the sleeve to slide downward in the inner support, pushing the outer wall of the sleeve through the pushing wedge block, and pushing the expansion block outward to move, and the expansion bars on the expansion block push the inner sides of all the stator punching sheets to push and shape them; at the same time, the pressing mechanism presses down from the top of the placement space to press the stator punching sheets tightly; and then the welding machine is used to weld the oblique welds on the outer sides of the stator punching sheets. , so that the stator punching sheet forms a whole; after welding is completed, the pull-down mechanism is disengaged from the driving pull rod, and the upper reset member drives the pushing sleeve to move until the inner end of the wedge block is pushed into the wedge groove, so that the expansion bar is disengaged from the inner side of the stator punching sheet and no longer contacts; the downward pressing mechanism is reset upward, and the welding tooling is transferred to the assembly position outside the welding machine through the transfer platform, and the upper tooling plate is removed; and the ejector rod is upward under the action of external force and drives the lifting platform to rise upward, that is, the stator punching sheet on the lifting platform can be ejected upward, and the automatic unloading process after completion, the stator punching sheet is transported away from the welding tooling as a whole; then, the ejector rod and the lifting platform descend to their original positions, realizing a one-time assembly, welding, and unloading process. The present invention can ensure that an oblique weld is formed between stator punchings placed in the space through the oblique mechanism, and can ensure that there is a twisting angle between the stator punchings; the stator punchings placed in the space can be pushed to be neat through the cooperation of the internal expansion mechanism and the guide pillar; and the downward pressing mechanism can ensure that the upper and lower adjacent stator punchings are closely fitted during welding, thereby improving the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the three-dimensional structure of the welding tool under the welding machine;

[0030] Figure 2 for Figure 1 Schematic diagram of the end plane;

[0031] Figure 3 This is a three-dimensional structural schematic diagram of the welding tool;

[0032] Figure 4 for Figure 3 A cross-sectional view of

[0033] Figure 5 It is a schematic diagram of the annular pressing template in the present invention;

[0034] Figure 6 for Figure 5 A schematic diagram of the structure after the pressing mechanism is hidden;

[0035] Figure 7 for Figure 6 A side plan view of a

[0036] Figure 8 for Figure 5 The schematic diagram of the structure after removing the stator punching is hidden in the middle;

[0037] Fig. 9 for Figure 8 The structural diagram after the upper and lower tooling plates are hidden;

[0038] Fig.10 It is a structural schematic diagram of the inner support in the present invention;

[0039] Fig.11 for Fig.11 A rear view structural diagram of ;

[0040] Fig.12 It is a schematic diagram of the structure of the push sleeve in the present invention;

[0041] Fig.13 It is a structural schematic diagram of the inclined mechanism in the present invention;

[0042] Fig.14 It is a structural schematic diagram of the guide column in the present invention;

[0043] Fig.15 It is a schematic diagram of the structure of the swelling block in the present invention;

[0044] Fig.16 for Fig.15 A rear view structural diagram of ;

[0045] Fig.17 It is a schematic diagram of the structure after the stator punching sheets are assembled into a whole;

[0046] In the accompanying drawings, 1 is a base, 2 is a lifting platform, 3 is a guide column, 4 is a fixed block, 5 is a push rod, 6 is a guide sleeve, 7 is an inner support, 8 is a lower liner, 9 is an upper liner, 10 is an annular insertion space, 11 is a pad, 12 is a lower tooling plate, 13 is an upper tooling plate, 14 is a clearance groove, 15 is a lower positioning pin, 16 is an upper positioning pin, 17 is a weld, 18 is an assembly block, 19 is an inclined strip, 20 is an installation groove, 21 is an upper notch of the installation groove, 22 is a limiting portion, 23 is a limiting surface, 24 is a positioning block, 25 is Positioning hole, 26 is the plug-in unit, 27 is the assembly surface, 28 is the expansion block, 29 is the expansion strip, 30 is the pushing sleeve, 31 is the pushing wedge block, 32 is the axial section, 33 is the wedge groove, 34 is the assembly hole, 35 is the upper limit member, 36 is the inner increase block, 37 is the driving pull rod, 38 is the upper reset member, 39 is the driving slot, 40 is the supporting platform, 41 is the transfer platform, 42 is the lower limit member, 43 is the limit part, 44 is the connecting part, 45 is the step hole, 46 is the annular lower pressure template, 47 is the extension part, and 48 is the welding machine.

[0047] 100 is the stator punching sheet. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] like Figure 1-17 As shown, the inclined-piece stator welding tool comprises a base 1, a lifting platform 2, an inner expansion mechanism, and a downward pressure mechanism. The base is placed horizontally, and a plurality of guide pillars 3 are arranged vertically along the outer periphery above the base. The guide pillars are cylindrical, with the same height and size. The number of guide pillars is arranged around the base according to the needs. In the drawings of this application, it is shown that seven guide pillars are arranged, and the inner sides of the seven guide pillars are on a circumference. The diameter of the circumference formed is adapted to the outer diameter of the stator punching 100, so as to facilitate the determination of the outer diameter of the stator punching. A fixing block 4 is installed under the base, and the middle and both ends of the fixing block have mounting holes respectively. The mounting hole in the middle is used for screws to pass through and connect with the lower end of the guide pillar to install the guide pillar, and the mounting holes at both ends are used to screw in the screws to connect the fixing block to the lower surface of the base. In this structure, when it is necessary to replace the guide pillars of different heights or maintain them, the screws connecting the middle part with the lower end of the guide pillar can be directly unscrewed from the bottom of the base, which is convenient for replacement.

[0050] The lifting platform is annular and is located above the base. A clearance hole for a clearance guide column is provided on the lifting platform. The guide column passes through the lifting platform, and the lifting platform moves up and down along the stroke of the guide column; a plurality of ejector rods 5 are vertically fixedly arranged below the lifting platform, and the plurality of ejector rods are distributed around the lifting platform. The lower ends of the ejector rods pass through the base and extend downward as ejection docking ends. When in use, a vertically telescopic driving cylinder, such as an air cylinder, an oil cylinder, an electric cylinder, etc., is equipped. The driving end of the driving cylinder is fixedly connected to a top plate, and a driving rod corresponding to the number and position of the ejector rods is fixed on the top plate. The driving cylinder drives the top plate to rise, and the ejection rod on the top plate corresponds to the ejector rod, and drives the ejector rod upward and drives the lifting platform to rise upward, that is, the stator punching on the lifting platform can be ejected upward, and this process is the automatic unloading process after the stator punching welding is completed; then, the driving cylinder descends, and the ejector rod and the lifting platform descend to their original positions, waiting for the next unloading process. During the lifting process of the lifting platform, the guide column forms a stable guide for the lifting platform. At the position where the lifting platform passes through the guide column, a guide sleeve 6 is added to cooperate with the guide column to make the lifting of the lifting platform more stable and smooth.

[0051] An inner support 7 with a circular cavity inside is fixedly assembled in the middle of the base, the lower end of the inner support is fixedly assembled in the middle of the base by a lower liner 8, and an upper liner 9 is fixedly assembled on the upper end of the inner support by screws, and the cross-sectional shapes of the upper and lower liner blocks match the inner support; of course, the inner support can be directly assembled to the base, and the upper and lower liner blocks are added, which can not only protect the inner support, but also reduce the use size of the inner support, thereby reducing the processing difficulty and processing cost of the inner support.

[0052] An annular insertion space 10 is formed between the outer periphery of the inner support, the top of the lifting platform, and the inner side of the guide column for the stator punching sheets 100 to be stacked and placed; the bottom of the insertion space has a pad 11 and a lower tooling plate 12, and the top has an upper tooling plate 13, and the pad, upper and lower tooling plates are all annular bodies placed in the horizontal direction; the pad is fixedly assembled on the lifting platform by screws, and a clearance groove 14 is opened on the outer peripheral wall of the pad, and the upper end of the push rod is connected to the lifting platform by screws, where the screw is below the clearance groove, and the clearance groove makes way for the assembly of the push rod, which is convenient for installation. The lower tooling plate is above the pad, and contacts with the stator punching sheets at the bottom layer in the insertion space to form a support; the material of the lower tooling plate is copper to avoid adhesion with the stator punching sheets during welding; a lower positioning pin 15 is fixed on the lifting platform, and the lower positioning pin passes through the pad and the lower tooling plate in turn upward and exposes the lower tooling plate, and is inserted into the inner groove of the stator punching sheets at the bottom layer of the insertion space to position the stator punching sheets at the bottom layer of the insertion space. The upper tooling plate is fixedly connected with an upper positioning pin 16 extending downward, which is inserted into the inner groove of the uppermost stator punching sheet in the insertion space to position the uppermost stator punching sheet in the insertion space; the uppermost and lowermost stator punching sheets are the upper and lower end plates of the stator, and the winding grooves of these two stator punching sheets are slightly larger than other stator punching sheets, which is convenient for the later stator winding; since the upper and lower end plates cannot be positioned by the inclined bars 19, positioning pins are used for positioning. The outer periphery of the upper and lower tooling plates is distributed with arc grooves for guide columns 3 at corresponding positions, and after the tooling plates are placed in the insertion space, the guide columns are in the arc grooves to limit the tooling plates and prevent them from rotating.

[0053] An inclined mechanism is arranged outside the inner support, which enables the welding grooves at corresponding positions on the outer sides of the upper and lower adjacent stator punching sheets to form an obliquely arranged weld bead 17 when the stator punching sheets are stacked and placed in the insertion space; the inclined mechanism includes an assembly block 18 and an inclined bar 19, and an installation groove 20 is opened outside the inner support along the axial direction, the installation groove runs through the upper and lower surfaces of the inner support, the size of the upper notch 21 of the installation groove is larger than the size of the lower notch, and the assembly block is inserted into the installation groove from top to bottom; a limiting structure is arranged between the assembly block and the installation groove, which limits the radial movement of the assembly block along the inner support after the assembly block is inserted into the installation groove; There are limiting parts 22 extending toward the middle on both sides of the installation groove, and limiting surfaces 23 cooperating with the limiting parts on both sides of the assembly block. The limiting parts block the limiting surfaces, and the limiting parts and limiting surfaces constitute the limiting structure above to limit the inclined bar in the installation groove and prevent it from moving in the horizontal direction; the outer wall of the assembly block is provided with an inclined groove for the inclined bar to be inserted, and the inclined bar is fixedly installed in the inclined groove, and the outer side of the inclined bar is an insertion part inserted into the inner groove of the stator punching sheet to form an oblique arrangement of the inner grooves of the upper and lower adjacent stator punching sheets, that is, it can realize the oblique arrangement of the welding grooves on the outside of the stator punching sheets. The limiting structure does not extend to the upper notch of the installation groove. When the assembly block needs to be taken out of the installation groove, the assembly block is taken out upward. Due to the large size of the upper notch and the absence of the limiting structure, the assembly block can be smoothly separated from the installation groove, which is also convenient for the assembly block to be assembled into the installation groove. A positioning block 24 is fixedly provided with screws on the base, a positioning hole 25 is opened on the positioning block, and a plug-in 26 is fixedly provided on the lower end surface of the assembly block, and the plug-in is inserted into the positioning hole. When the plug-in is inserted into the positioning hole, it indicates that the assembly block is assembled in place. This structure can better enable the assembly block to be accurately assembled.

[0054] The inner support is a circular ring body with an internal cavity, and two assembly surfaces 27 are cut out on the outer periphery of the inner support. The assembly surfaces are vertical surfaces arranged axially along the circumferential surface of the inner support. Each assembly surface is correspondingly equipped with a swelling block 28, and the swelling block is arranged axially along the inner support; the swelling block includes an swelling block body vertically assembled on the assembly surface, and an obliquely arranged assembly groove is opened on the outer side of the swelling block body, and an expansion bar 29 inserted into the inner side notch of the stator punching sheet is fixedly installed in the assembly groove, and the expansion bar is exposed from the assembly groove. When the stator punching sheet is expanded outward, the outer side of the expansion bar is pushed outward against the inner wall of the stator punching sheet.

[0055] An inner expansion mechanism is provided in the inner support, which drives the expansion block to push outward to expand and align the inner side of the stator punching sheet or retract it inward; the inner expansion mechanism includes an expansion block pushing mechanism and a driving mechanism that drives the expansion block pushing mechanism to move; the expansion block pushing mechanism is arranged in the inner support, which drives the expansion block to push outward to expand and align the inner side of the stacked stator punching sheet inserted in the space; a reset mechanism is provided between the inner support and the expansion block, which drives the expansion block to retract toward the inner support after the expansion block pushing mechanism loses the outward expansion force on the expansion block, so that the expansion block is separated from the inner side of the stator punching sheet.

[0056] The expansion block pushing mechanism includes a pushing sleeve 30 and a pushing wedge block 31; the pushing sleeve is a hollow circular ring body, and two axial sections 32 are cut along the axial direction on the outer wall of the pushing sleeve. The pushing sleeve is in the cavity in the inner support, and the outer wall of the pushing sleeve forms a sliding fit with the inner wall of the inner support. The driving mechanism drives the pushing sleeve to move up and down in the vertical direction in the inner support; an inwardly recessed wedge groove 33 is provided on the axial section of the outer periphery of the pushing sleeve; three wedge grooves of each axial section are arranged at intervals in the horizontal direction.

[0057] A square assembly hole 34 is opened in the radial direction of the inner support, and the assembly hole connects the outside and the inside of the inner support; the outer end face of the pushing wedge is a connecting plane fixedly connected to the expansion block screw, and the inner end face is an arc-shaped end; the pushing wedge is placed in the assembly hole, the outer end of the pushing wedge is fixedly connected to the inner side of the expansion block, and the inner end of the pushing wedge cooperates with the outer wall of the pushing sleeve; the pushing sleeve drives the pushing wedge to push the expansion block outward to expand, so that the expansion bar on the expansion block can push the inner side of the stator punching sheet outward to push and shape it; the wedge groove is for the inner end of the pushing wedge to make way when the expansion block retracts toward the inner support, and the wedge groove is a shape adapted to the inner end of the pushing wedge.

[0058] The upper part of the push sleeve is fixedly equipped with an upper limit piece 35 that cooperates with the upper part of the inner support to limit the downward stroke of the push sleeve. The lower part of the push sleeve is fixedly equipped with an inner increase block 36 by screws, and the inner increase block is connected to the driving mechanism. The setting of the inner increase block reduces the height dimension of the push sleeve, reduces the material used for the push sleeve, reduces the processing difficulty and processing cost, and saves the cost of the push sleeve (the push sleeve requires high precision and wear resistance, and the processing cost is relatively high).

[0059] The driving mechanism includes a driving rod 37 and an upper reset member 38. The upper end of the driving rod is connected to the inner increase block to drive the movement of the inner increase block. The lower end of the driving rod extends through the base to the bottom of the base as the driving end. The lower end of the driving rod is provided with a driving slot 39; the upper reset member is arranged between the lower surface of the inner increase block and the upper surface of the base, and is compressed by the two to store energy. The upper reset member is made of springs, shrapnel, etc.; when the inner expansion is shaped, the driving rod pulls the inner increase block downward and pushes the sleeve downward, thereby pushing the expansion block outward by pushing the wedge block. This action is maintained during the welding process of the welding machine.

[0060] A circular support platform 40 is fixedly arranged in the middle of the lower part of the base, and the support platform is fixedly assembled on a transfer platform 41 that moves back and forth in the horizontal direction. A lower limiter 42 is arranged in the support platform, and the lower end of the driving rod is arranged on a limiter 43 that cooperates with the lower limiter to limit the upward stroke of the driving rod, so as to ensure the accuracy of the upward and downward stroke of the push sleeve. Among them, the transfer platform is driven by a common method, such as a motor with a lead screw, or a cylinder / oil cylinder with a lead screw, which will not be described here.

[0061] The reset mechanism includes a reset elastic member and a connecting member (stud) 44. The reset elastic member is a reset spring. A step hole 45 that runs through the inside and outside of the expanding block is opened in the expanding block. The front end of the connecting member is the connecting end, and the rear end of the connecting member is the limiting end. The front end of the connecting member passes through the step hole from the outside of the expanding block and is connected to the inner support to assemble the expanding block outside the inner support. The reset elastic member is placed in the step hole and is compressed by the step surface of the step hole and the limiting end of the connecting member. When the expanding block pushing mechanism drives the expanding block to be pushed outward, the reset elastic member is compressed and stores energy. After the internal expansion pushing mechanism loses the outward supporting force on the expanding block, the reset elastic member pushes the expanding block to retract in the direction of the inner support.

[0062] The pressing mechanism presses down the stacked stator sheets in the insertion space from top to bottom. The pressing mechanism includes an annular pressing template 46 located just above the insertion space, which presses down on the stator sheets in the insertion space; an extension 47 extends outward from the outer circumference of the pressing template to cooperate with the upper end surface of the guide column to limit the pressing stroke of the pressing template. The pressing mechanism is assembled above the welding machine, and the lifting and lowering action of the pressing template is driven by the driving cylinder.

[0063] Before welding, the welding tool is outside the welding machine 48, and the pad 11 and the lower tooling plate 12 are placed at the bottom of the placement space in turn, and one or more stator punching sheets 100 are placed into the placement space at a time. When placing the stator punching sheets, the inner grooves of the stator punching sheets are made to slide down and overlap in turn against the inclined bars and placed horizontally. After the stator punching sheets are placed, the upper tooling plate is pressed on the uppermost stator punching sheets, and the upper positioning pins under the upper tooling plate are inserted into the inner grooves of the uppermost stator punching sheets for positioning, and the welding grooves on the outer sides of the stator punching sheets form oblique welds; the welding tool is pushed to the bottom of the welding machine through the transfer platform 41, and the pulling end of the pull-down mechanism is inserted into the driving groove at the lower end of the driving rod, driving the driving rod to move downward, thereby pushing the sleeve to slide downward in the inner support, pushing the outer wall of the sleeve through the pushing wedge block, and pushing the expansion block outward to move, and the expansion bar on the expansion block pushes the inner side of all stator punching sheets, Push and align the shape; at the same time, the upper annular pressing template presses down from above the inserted space to press the stator punching sheets tightly. After the above process is completed, the oblique weld on the outside of the stator punching sheet is welded by a welding machine to form the stator punching sheet as a whole; after welding is completed, the pull-down mechanism is disengaged from the driving pull rod, and the upper reset member drives the push sleeve to move until the inner end of the wedge block is pushed into the wedge groove, so that the expansion bar is disengaged from the inner side of the stator punching sheet and no longer contacts; the pressing mechanism is reset upward, and the welding tooling is transferred to the assembly position outside the welding machine through the transfer platform, and the upper tooling plate is removed; and the ejector rod is upward under the action of external force and drives the lifting platform to rise upward, that is, the stator punching sheet on the lifting platform can be ejected upward, and the automatic unloading process is completed, and the stator punching sheet is transported away from the welding tooling as a whole; then, the ejector rod and the lifting platform descend to their original positions to realize a one-time assembly, welding and unloading process.

Claims

1. The inclined-piece stator welding tool is characterized by: It includes a base, a lifting platform, an inner expansion mechanism, and a downward pressure mechanism. The base is placed horizontally, and a plurality of guide pillars are arranged vertically at intervals along the outer periphery above the base, and the inner sides of the plurality of guide pillars are on a circle; the lifting platform is annular, and the lifting platform is located above the base, and the guide pillars pass through the lifting platform, and the lifting platform moves up and down along the travel of the guide pillars; an inner support with a cavity inside is fixedly assembled in the middle of the base, and an annular insertion space for the stator punching sheets to be stacked and placed is formed between the outer periphery of the inner support, the upper part of the lifting platform, and the inner side of the guide pillars; an inclined mechanism is arranged outside the inner support, which makes the welding grooves at the corresponding positions on the outer sides of the upper and lower adjacent stator punching sheets form an obliquely arranged weld bead when the stator punching sheets are stacked and placed in the insertion space; at least one expansion block is arranged outside the inner support, and a An internal expansion mechanism that drives the expansion block to push outward to expand and align the inner side of the stator punching sheet or retract it to the inner side; the pressing mechanism presses down the stacked stator punching sheets in the inserted space from top to bottom above the inserted space; the internal expansion mechanism includes an expansion block pushing mechanism and a driving mechanism that drives the expansion block pushing mechanism to move; the inner support is a circular ring body with an internal cavity, and an assembly surface for assembling the expansion block is cut out on the outer periphery of the inner support, and the assembly surface is a vertical surface arranged axially along the circumferential surface of the inner support, and the expansion block is arranged axially along the inner support; the expansion block pushing mechanism is arranged in the inner support, and drives the expansion block to push outward to expand and align the inner side of the stacked stator punching sheets in the inserted space; a mechanism is provided between the inner support and the expansion block when the expansion block pushing mechanism loses its outward expansion force on the expansion block After that, the expansion block is driven to retract toward the inner support, so that the expansion block is separated from the inner side of the stator punching sheet by a reset mechanism; the expansion block includes an expansion block body vertically assembled on the assembly surface, and an inclined assembly groove is provided on the outer side of the expansion block body, and an expansion bar inserted into the inner notch of the stator punching sheet is fixedly installed in the assembly groove, and the expansion bar is exposed from the assembly groove; the inclined mechanism includes an assembly block and an inclined bar, and an installation groove is provided outside the inner support along the axial direction, and the installation groove passes through the upper and lower surfaces of the inner support, the upper notch size of the installation groove is larger than the lower notch size, and the assembly block is inserted into the installation groove from top to bottom; a limiting structure is provided between the assembly block and the installation groove, and after the assembly block is inserted into the installation groove, the radial movement of the assembly block along the inner support is limited; a positioning block is fixedly provided on the base, and the ... A positioning hole is provided on the positioning block, and a plug-in is fixedly provided on the lower end surface of the assembly block, and the plug-in is inserted into the positioning hole; the expansion block pushing mechanism includes a pushing sleeve and a pushing wedge block; the pushing sleeve is in the inner support, and the driving mechanism drives the pushing sleeve to perform lifting and lowering movements in the vertical direction of the inner support; an inwardly recessed wedge groove is provided on the outer periphery of the pushing sleeve; an upper limit positioning member that cooperates with the upper part of the inner support to limit the descending stroke of the pushing sleeve is fixedly provided above the pushing sleeve, and an inner increase block is provided below the pushing sleeve, and the inner increase block is connected to the driving mechanism; the driving mechanism includes a driving pull rod and an upper reset member, the upper end of the driving pull rod is connected to the inner increase block, the lower end of the driving pull rod extends through the base to the bottom as the driving end, and the lower end of the driving pull rod is provided with a driving card slot;The upper reset member is arranged between the lower surface of the inner increase block and the upper surface of the base, and is compressed by the two to store energy; an annular support platform is fixedly arranged in the middle of the lower part of the base, and the support platform is fixedly assembled on the transfer platform that moves back and forth in the horizontal direction, and a lower limit member is arranged in the support platform, and the lower end of the driving pull rod is arranged on a limit part that cooperates with the lower limit member to limit the upward stroke of the driving pull rod; the pressing mechanism includes an annular pressing template located just above the insertion space, and the pressing template is pressed down on the upper part of the stator punching in the insertion space; an extension part is extended outward from the outer circumference of the pressing template to cooperate with the upper end surface of the guide column to limit the pressing stroke of the pressing template. ; 2. The oblique-slice stator welding tool as claimed in claim 1, characterized in that: An assembly hole is opened in the radial direction of the inner support, and the assembly hole connects the outside and the inside of the inner support. The push wedge block is placed in the assembly hole, and the outer end of the push wedge block cooperates with the inner side of the expansion block, and the inner end of the push wedge block cooperates with the outer wall of the push sleeve; the push sleeve drives the push wedge block to push the expansion block outward to expand; the wedge groove is used for the inner end of the push wedge block to make way for the expansion block to retract toward the inward support.

3. The oblique-slice stator welding tool as claimed in claim 1 or 2, characterized in that: The reset mechanism includes a reset elastic member and a connecting member. A step hole penetrating the inner and outer sides of the expanding block is opened in the expanding block. The front end of the connecting member is a connecting end, and the rear end of the connecting member is a limiting end. The front end of the connecting member passes through the step hole from the outer side of the expanding block and is connected to the inner support so that the expanding block is assembled outside the inner support. The reset elastic member is placed in the step hole and is compressed by the step surface of the step hole and the limiting end of the connecting member. When the expansion block pushing mechanism drives the expansion block to push outward, the reset elastic member is compressed and stores energy. After the inner expansion pushing mechanism loses the outward supporting force on the expansion block, the reset elastic member pushes the expansion block to retract in the inward supporting direction.

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