CN219944882U - Flexible positioning welding tool - Google Patents

Abstract

The utility model provides a flexible positioning welding tool, which comprises the following components: the main frame is used for installing a main board, and the main board is provided with a first positioning hole corresponding to the assembly position of the power module; the elastic support assemblies are arranged on the bottom surface of the main frame, the tops of the elastic support assemblies penetrate through the first positioning holes to form support positions for the power modules, and the power modules can lift and displace on the elastic support assemblies; and the pressing plate is arranged on the top surface of the main frame and is provided with a pressing position and a non-pressing position, and when the pressing plate moves to the pressing position, the power module arranged on the elastic supporting component is pressed downwards. According to the utility model, the thickness change of the power module is compensated by the expansion and contraction amount of the elastic support piece, so that the power modules with different thicknesses can be positioned at the same height value by the pressing plate, and the power module has the characteristics of strong universality, simplicity in operation and high operation efficiency.

Description

Flexible positioning welding tool

Technical Field

The utility model relates to the technical field of PCB welding, in particular to a flexible positioning welding tool.

Background

The air conditioner control circuit board (abbreviated as a main board) is composed of various electronic components, when the main board is welded, common patch type components enter a reflow soldering after being printed by solder paste, and some high-power modules with pins are as follows: IPM (Intelligent Power Module), IGBT, diode and rectifier bridge, the process requires fixed-height welding, and the height of the welded power module and the main board keep a certain fixed value so as to ensure that the power module is well assembled with materials such as a radiator, a main board mounting box and the like, thereby achieving the purpose of normal operation of the power device.

At present, in order to improve production efficiency, the power modules with pins are usually welded by adopting a positioning welding tool to fix, and then enter a selective welding device to be automatically welded. The current fixed-position welding frock realizes the fixed-position of power module through the fixed-position height platform, and as shown in fig. 10, the fixed-position height platform includes: the top surface of the first-stage boss X forms a first limiting surface for supporting the main board 1; the second-stage boss Y is concentrically arranged on the top surface of the first-stage boss X and is suitable for the first positioning hole of the main board 1 to pass through, and the top surface of the second-stage boss Y forms a second limiting surface for supporting the power module 2; the limiting protrusions Z are concentrically arranged on the top surface of the secondary boss Y and are suitable for the second positioning holes of the power module 2 to penetrate through so as to position the power module 2. The whole step structure that is of location height fixing platform, the first spacing face that one-level boss top surface formed in the step form boss, with the supporting table top parallel and level of main plate, form the effective support to the bottom surface of mainboard jointly, the second grade boss top surface surpasses the top surface size H1 of mainboard after the location and the sum of power module body size H2, just in time satisfies the power module welding back power module top surface that requires apart from the top surface vertical height size H of mainboard, h1+h2=H promptly, ensures that power module high accuracy location is decided high.

However, the power module has different body heights according to different design demands, therefore, the second limiting surface of the positioning and height fixing platform needs to be set according to the body height difference of the power module, so that the positioning height of each power module is consistent, the adaptability of the tool is poor, although the positioning and height fixing platform can be set to be a detachable positioning and connecting structure, different positioning and height fixing platforms are replaced to be matched and applicable to different power modules, but different air conditioner mainboards are required, the types and specifications of the power modules are different, the positioning and height fixing platform needs to be frequently switched, the operation is complex, the operating efficiency of staff is affected, and quality problems are easily caused by the error in mounting of the positioning and height fixing platform.

Disclosure of Invention

The utility model aims to provide a flexible positioning welding tool, which solves the problems that the existing positioning welding tool is complex in operation, low in efficiency and incapable of guaranteeing the quality of products.

In order to achieve the above object, the present utility model provides a flexible positioning welding tool, including:

the main frame is used for installing a main board, and the main board is provided with a first positioning hole corresponding to the assembly position of the power module;

the elastic support assemblies are arranged on the bottom surface of the main frame, the tops of the elastic support assemblies penetrate through the first positioning holes to form support positions for the power modules, and the power modules can lift and displace on the elastic support assemblies;

and the pressing plate is arranged on the top surface of the main frame and is provided with a pressing position and a non-pressing position, and when the pressing plate moves to the pressing position, the power module arranged on the elastic supporting component is pressed downwards.

According to the flexible positioning welding tool, the height between the pressing plate and the main plate is set according to the welding height of the power module and the main plate, when the flexible positioning welding tool is used, the main plate is placed in the main frame, the power module is placed on the corresponding elastic supporting component, the pressing plate is pressed, the power module is pressed downwards, the top surface of the power module is attached to the bottom surface of the pressing plate under the elastic action of the elastic supporting component, the height of the power module is fixed, and when the thickness of the power module changes, the top surface of the power module can be guaranteed to be attached to the pressing plate all the time through elastic expansion and contraction of the elastic supporting component, so that the same height value is maintained.

Further, for the installation of convenient elastic support subassembly, flexible fixed-position welding frock still includes:

the two ends of the connecting plate are connected with the bottom surface of the main frame, and the elastic supporting components are arranged on the connecting plate at intervals.

Further, to accommodate different power modules, the elastic support assembly includes:

the elastic piece is vertically arranged on the connecting plate;

and the support piece is used for installing the power module and is detachably connected to the movable end of the elastic piece. Therefore, different supporting pieces can be selected according to different power modules, and switching of the whole elastic supporting assembly is avoided.

Further, the power module has a second positioning hole, and the support member includes:

the support column is connected with the elastic piece, and the top surface of the support column forms a support for the power module;

and the limiting column is overlapped on the top surface of the supporting column and is suitable for the second positioning hole of the power module to pass through. Through the ladder type structure, stable positioning of the power module is realized.

Further, the connecting plate is provided with a mounting hole, and the elastic piece is a spring thimble arranged in the mounting hole.

Further, the mounting hole runs through the connecting plate sets up, the spring thimble includes:

the sleeve is embedded in the mounting hole, and the bottom end of the sleeve extends inwards to form a circle of annular blocking edge;

the guide post is provided with a large-diameter section and a small-diameter section which are distributed up and down, the large-diameter section is connected with the sleeve in a sliding fit manner, and the small-diameter section at least partially extends out of the blocking edge of the sleeve;

the spring is sleeved on the small-diameter section of the guide post and is positioned between the large-diameter section and the blocking edge;

the clamp spring is sleeved on the small-diameter section extending out of the blocking edge;

the support piece is detachably connected to the top end of the large-diameter section of the guide post.

Compared with the common spring thimble, the through structure of the utility model can realize larger formation and is convenient to install and replace.

Further, in order to prevent the spring thimble from being polluted by soldering flux and causing bad rebound phenomenon when the spring thimble is subjected to selective welding, the flexible positioning welding fixture further comprises a protective cover, wherein the protective cover is arranged on the bottom surface of the connecting plate and used for covering the spring thimble.

Further, in order to facilitate replacement and maintenance, the number of the protection covers is consistent with that of the spring thimbles, and the protection covers are detachably connected to the bottom surface of the connecting plate.

Further, a ring sleeve connected with the mounting hole is arranged on the bottom surface of the connecting plate, a retainer ring extending outwards along the radial direction is arranged at the bottom end of the ring sleeve, two notches are symmetrically arranged on the peripheral wall of the retainer ring along the circumferential direction of the retainer ring, two grooves are symmetrically arranged on the top surface of the retainer ring, and the grooves and the notches are staggered;

the protection casing is bottom confined cylinder casing, the internal diameter of cylinder casing with the external diameter phase-match of retaining ring, just the inner wall on the top of cylinder casing is provided with two archs along circumference symmetry, the arch can pass through the breach to after rotatory certain angle, by the recess blocks.

The rotary buckle structure is simple in structure and convenient to detach and install rapidly.

Further, in order to facilitate the installation and fixation of the main board, the inner wall of the main frame is provided with a containing groove for placing the main board,

the top surface interval of main frame is provided with a plurality of locating parts, the locating part can rotate on the main frame with spacing mainboard in the accommodation groove.

Further, in order to realize the switching between the pressing position and the non-pressing position of the pressing plate, the top surface of the main frame is also provided with a hinging seat;

one side of the pressing plate is hinged to the hinged seat, so that the pressing plate can be turned over relative to the main frame.

Further, a first magnetic piece is arranged on the pressing plate, a second magnetic piece is arranged on the main frame, and when the pressing plate is turned to a pressing position, the first magnetic piece and the second magnetic piece are attracted to each other. The clamp plate adopts magnetism to inhale location structure and carries out quick actuation location with the main frame, ensures the fastening connection of clamp plate and main frame in the welding process, also can realize the quick uninstallation of mainboard after the welding is accomplished simultaneously.

According to the technical scheme, the flexible positioning welding tool mainly comprises the main frame for positioning the main board, the elastic supporting piece for positioning the power module and the pressing plate for positioning the high power module, the welding height of the power module is determined through the pressing plate, and the thickness change of the power module is compensated through the expansion and contraction amount of the elastic supporting piece, so that the power modules with different thicknesses can be positioned at the same height value by the pressing plate, the flexible height fixing of the power module is realized, the problem that the conventional positioning welding tool needs to frequently switch positioning height fixing tables is thoroughly avoided, and the flexible positioning welding tool provided by the utility model has the characteristics of strong universality, simplicity in operation and high operation efficiency.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.

FIG. 1 is a schematic diagram of the front structure of a flexible fixed-position welding tool of the present utility model;

FIG. 2 is a schematic view of the back structure of the flexible positioning welding tool of the present utility model;

FIG. 3 is a top view of the flexible tack welding tool of the present utility model;

FIG. 4 is a cross-sectional view taken along A-A in FIG. 3;

fig. 5 is an enlarged view of a portion B in fig. 4;

FIG. 6 is a schematic view of another embodiment of the flexible support assembly of FIG. 5;

FIG. 7 is a schematic view of the structure of the protective cover of the present utility model;

FIG. 8 is a schematic view of a part of the structure of the connecting plate of the present utility model;

FIG. 9 is a cross-sectional view taken along the direction C-C in FIG. 3;

FIG. 10 is a schematic structural view of a prior art welding fixture;

wherein:

1-a main board; a 2-power module; 3-a main frame; 4-an elastic support assembly; 5-pressing plates; 6, connecting a plate; 7-protecting cover; 8-limiting pieces; 9-hinging seats;

31-a containing groove; 32-a second magnetic member; 41-an elastic member; 42-a support; 51-a first magnetic member; 61-check ring; 62-notch; 63-grooves; 64-boss; 71-bump;

411-sleeve; 412-a guide post; 413-a spring; 414-snap springs; 421-support column; 422-limit posts.

Detailed Description

The present utility model will be described in detail below with reference to the drawings and embodiments, and it should be noted that the embodiments of the present utility model and features of the embodiments may be combined with each other without conflict.

It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The utility model provides a flexible positioning welding tool, which aims to solve the problems that the existing positioning welding tool is complex in operation, low in efficiency and incapable of guaranteeing the quality of products.

As shown in fig. 1 to 5, the flexible positioning welding fixture of this embodiment includes a main frame 3, an elastic support assembly 4 and a pressing plate 5, wherein, the main frame 3 is used for installing a main board 1, the main board 1 has a first positioning hole corresponding to the assembly position of the power module 2, the elastic support assembly 4 is used for installing the power module 2, the quantity matches with the quantity of the power modules 2 to be welded, the elastic support assembly 4 is arranged on the bottom surface of the main frame 3, and the first positioning hole on the main board 1 is fit to pass through, after the power module 2 is installed on the elastic support assembly 4, lifting displacement can be realized through the expansion and contraction of the elastic support assembly 4, the pressing plate 5 is arranged on the top surface of the main frame 3, and has a pressing position and a non-pressing position, and when the pressing plate 5 moves to the pressing position, the power module 2 installed on the elastic support assembly 4 is pressed downwards.

By applying the technical scheme of the embodiment, the welding height of the power module 2 generally refers to the height of the top surface of the power module 2 from the top surface of the main board 1, which is generally 7.2mm or 9mm, so that after the heat dissipation paste is brushed, the power module 2 is adhered to the bottom surface of the pressing board 5 conveniently, therefore, before use, the distance between the pressing board 5 at the pressing position and the main frame 3 is adjusted according to the welding height requirement of the power module 2, so that the distance between the pressing board 5 at the pressing position and the main board 1 is ensured to be equal to the welding height of the power module 2, when in use, the main board 1 is placed in the main frame 3, then the power module 2 is placed on the corresponding elastic supporting component 4, then the pressing board 5 presses the power module 2 and the elastic supporting component 4 downwards, and simultaneously, the top surface of the power module 2 is adhered to the bottom surface of the pressing board 5 under the elastic action of the elastic supporting component 4, so that the fixed height of the power module 2 is realized, and the pressing quantity of the pressing board 4 is correspondingly changed when the thickness of the power module 2 is changed in advance, so that the bottom surface of the power module 2 can be ensured to be always kept at the same high value with the pressing value of the pressing board 5.

Therefore, the flexible positioning welding tool provided by the utility model compensates the thickness change of the power module 2 through the expansion and contraction amount of the elastic supporting component 4, so that the power modules 2 with different thicknesses can be positioned at the same height value by the pressing plate 5, the flexible height setting of the power module 2 is realized, the problem that the conventional positioning welding tool needs to frequently switch positioning height setting platforms is thoroughly avoided, and the flexible positioning welding tool provided by the utility model has the characteristics of strong universality, simplicity in operation and high operation efficiency, and meanwhile, the good height setting and positioning of the power module 2 are ensured, and the welding quality of a final product is also ensured.

As shown in fig. 4 and 9, the main frame 3 is a rectangular frame structure, the inner wall of the frame is recessed outwards to form a containing groove 31 adapted to the shape and size of the motherboard 1, a plurality of limiting members 8 are installed on the main frame 3 at intervals, and the limiting members 8 can rotate on the main frame 3 to limit the motherboard 1 in the containing groove 31. When the main board 1 is installed, the main board 1 is placed in the accommodating groove 31, and the plurality of limiting pieces 8 are rotated to a limiting state, so that the fixing of the main board 1 is completed. Preferably, the bottom surface of the accommodating groove 31 is the same as the thickness of the main board 1 from the top surface of the main frame 3, so that the limiting piece 8 can conveniently position the main board 1.

As shown in fig. 1, the pressing plate 5 is disposed on the top surface of the main frame 3 in a reversible manner, specifically, two hinge seats 9 are disposed at intervals on the left side of the top surface of the main frame 3, and the left side of the pressing plate 5 is hinged on the two hinge seats 9, so that the pressing plate 5 can be turned over relative to the main frame 3. When the power module is used, the pressing plate 5 is turned upwards, so that the pressing plate 5 is positioned at a non-pressing position, the main board 1 and the power module 2 are installed, after the installation is completed, the pressing plate 5 is turned downwards, so that the pressing plate 5 is positioned at a pressing position attached to the main frame 3, and the power module 2 installed on the elastic support assembly 4 is pressed downwards.

As can be seen from fig. 4, the distance between the bottom surface of the pressing plate 5 and the bottom surface of the accommodating groove 31 is the overall height of the power module 2 after being welded to the motherboard 1, and the overall height of the welded motherboard 1 is more accurate due to the substrate tolerance of the motherboard 1 and the body tolerance of the power module 2 being absorbed. In addition, in order to be convenient for adjust the interval of clamp plate 5 and holding groove 31 bottom surface, can set up the briquetting that can adjust from top to bottom at clamp plate 5 corresponds to elastic support subassembly 4, both be convenient for height-adjusting, also avoid clamp plate 5 bottom surface unevenness, the error that warp and lead to.

In order to fix the pressing plate 5 at the pressing position, a detachable connection structure is required to be arranged between the opposite side of the pressing plate 5 and the main frame 3, for example, an elastic buckle can be arranged on the bottom surface of the pressing plate 5 in a clamping manner, a clamping groove is formed in the top surface of the main frame 3, or a clamping groove is formed in the bottom surface of the pressing plate 5, an elastic buckle is arranged on the top surface of the main frame 3, and connection between the elastic buckle and the clamping groove is realized or released through clamping fit of the elastic buckle and the clamping groove.

As shown in fig. 9, the pressing plate 5 and the main frame 3 of the present embodiment are fixed by magnetic attraction and positioning, specifically, a first magnetic member 51 is disposed on the pressing plate 5, and a second magnetic member 32 is disposed on the main frame 3, and when the pressing plate 5 is turned to the pressing position, the first magnetic member 51 and the second magnetic member 32 are attracted to each other. The clamp plate 5 adopts magnetism to inhale location structure and carries out quick actuation location with main frame 3, ensures the fastening connection of clamp plate 5 and main frame 3 in the welding process, also can realize the quick uninstallation of mainboard 1 after the welding is accomplished simultaneously.

Optionally, the pressing plate 5 may further adopt an integral fastening connection structure to connect with the main frame 3, and when the motherboard 1 and the power module are installed, the pressing plate 5 is removed, and after the installation is completed, the pressing plate 5 is fastened on the main frame 3.

As shown in fig. 2, in order to realize connection of the elastic support assembly 4 and the main frame 3, a connection plate 6 is erected on the bottom surface of the main frame 3, two ends of the connection plate 6 are connected with the bottom surface of the main frame 3, and the elastic support assembly 4 is arranged on the connection plate 6 at intervals.

As shown in fig. 4 and 8, since the main board 1 is mounted close to the top surface of the main frame 3, there is a height difference between the bottom surface of the main board 1 and the bottom surface of the main frame 3, in order to make the support positioning of the main board 1 more stable, the positioning error caused by the local deformation of the main board 1 is avoided, and the boss 64 is disposed at the position where the elastic support component 4 is mounted on the connecting board 6. Referring to fig. 5, the top surface of the boss 64 forms a support for the motherboard 1, and meanwhile, the top surface of the boss 64 further has a limiting table, which cooperates with the first positioning hole of the motherboard 1 to perform secondary positioning on the motherboard 1.

As shown in fig. 5 and 6, the elastic support assembly 4 includes an elastic member 41 and a support member 42, the elastic member 41 is vertically disposed on the connection board 6, the support member 42 is used for installing the power module 2, and the support member 42 is detachably connected to the movable end of the elastic member 41, so that different support members 42 can be selected according to different power modules 2, adaptability of the elastic support assembly 4 is improved, and switching of the whole elastic support assembly 4 is avoided.

During the concrete implementation, the second locating hole has on the power module 2, support piece 42 designs to ladder type structure, including support column 421 and spacing post 422, wherein, the bottom and the elastic component 41 threaded connection of support column 421 are convenient for change, and the top surface of support column 421 forms the support to power module 2, and spacing post 422 stack setting is at the top surface of support column 421, and is fit for the second locating hole of power module 2 to pass, like this, support column 421 supports power module 2, and spacing post 422 carries out spacingly to power module 2, realizes the stable location of power module 2.

It is easy to understand that the height of the limiting post 422 needs to be smaller than the body height of the power module 2, so that the phenomenon that the power module 2 floats up due to the fact that the pressing plate 5 does not press the power module 2 tightly is prevented.

Meanwhile, the elastic member 41 may be a micro damper disposed on the connection plate 6, for example, a micro gas spring, a spring thimble, a spring plunger, etc., so long as the power module 2 can be pressed down to be attached to the pressing plate 5 all the time, and can be restored to the original position after the external force is removed.

Referring to fig. 5, a feasible manner of using a spring thimble in the elastic member 41 of this embodiment is shown, in the drawing, a mounting hole penetrating up and down is formed on the connecting plate 6 and the boss 64, the elastic member 41 is disposed in the mounting hole, specifically, the elastic member 41 includes a sleeve 411, a guide pillar 412, a spring 413 and a clamp spring 414, where the sleeve 411 is embedded in the mounting hole, the bottom end of the sleeve 411 extends inward to form a ring-shaped blocking edge, the guide pillar 412 has a large diameter section and a small diameter section distributed up and down, the large diameter section is connected with the sleeve 411 in a sliding fit manner, the support member 42 is screwed on the top end of the large diameter section, the small diameter section of the guide pillar 412 extends out of the blocking edge at least partially, the spring 413 is sleeved on the small diameter section of the guide pillar 412 and is located between the large diameter section and the blocking edge, and the clamp spring 414 is sleeved on the small diameter section of the guide pillar extending out of the blocking edge, so as to prevent the guide pillar 412 from falling out, when the power module 2 on the support member 42 is pressed, the guide pillar 412 moves down, the spring 413 is compressed, and the generated elastic force will push the bottom surface 2 against the power module 5.

Referring to fig. 6, another possible way of using a spring thimble in the elastic member 41 of this embodiment is shown, in the drawing, the mounting holes formed on the connecting plate 6 and the boss 64 are blind holes with closed bottoms, the spring 413 is installed in the blind holes, the bottom of the guide post 412 is provided with a disc with a diameter matched with that of the blind holes, so that the guide post 412 slides up and down along the blind holes, in order to prevent the guide post 412 from falling out, the opening of the blind holes is provided with a snap spring 414, and the supporting member 42 is screwed on the top end of the guide post 412, so that when the power module 2 on the supporting member 42 is pressed, the guide post 412 moves down, the spring 413 is compressed, and the generated elastic force pushes the power module 2 against the bottom surface of the pressing plate 5.

In addition, because during automatic welding, the soldering flux needs to be sprayed automatically to the welding position below the main board 1, then the pins of the power module 2 are welded with the main board 1, and for the spring thimble structure with the open bottom as shown in fig. 5, the positioning welding tool is easy to pollute the spring thimble by the soldering flux when the spring thimble is subjected to selective welding, so that the poor rebound phenomenon of the guide pillar 412 is caused, and further, the positioning height is influenced, so that the product quality is abnormal. Therefore, in this embodiment, the protective cover 7 is additionally arranged on the bottom surface of the connecting plate 6, so that the spring thimble is prevented from being polluted and bonded by the soldering flux, and the abnormal phenomenon of no rebound is avoided.

As an alternative, the protection cover 7 is a strip-shaped large cover structure, and is fixed on the bottom surface of the connecting plate 6 through screws so as to cover all the spring thimbles.

As another alternative, in order to reduce the cost of the protection cover 7, the protection cover 7 is designed into a small cover structure, and is connected to the bottom of the mounting hole of the connecting plate 6, and the spring thimble is just covered.

Specifically, as shown in fig. 2, the number of the protecting covers 7 is consistent with the number of the spring thimbles, and the protecting covers 7 at corresponding positions are detached for maintenance by adopting threaded connection, snap connection or other quick-dismantling structures to be connected to the bottom surface of the connecting plate 6 to prevent the spring thimbles from being polluted and bonded by soldering flux.

Referring to fig. 7 and 8, a quick-dismantling connection mode of the protective cover 7 in this embodiment is shown, specifically, the bottom surface of the connecting plate 6 is provided with a ring sleeve connected with the mounting hole, the ring sleeve can be regarded as an extension of the inner wall of the mounting hole, the bottom end of the ring sleeve is provided with a retainer ring 61 extending outwards along the radial direction, two notches 62 are symmetrically arranged on the peripheral wall of the retainer ring 61 along the circumferential direction of the retainer ring 61, meanwhile, two grooves 63 are symmetrically arranged on the top surface of the retainer ring 61, the grooves 63 and the notches 62 are staggered, and in this embodiment, the two grooves are staggered by 90 degrees; the protection casing 7 is the closed cylinder casing of bottom, and the internal diameter matches with the external diameter of retaining ring 61, and the inner wall on the top of cylinder casing is provided with two arches 71 along circumference symmetry, and protruding 71 can pass through breach 62 to after rotatory 90, blocked by recess 63.

During installation, the protrusion 71 of the protection cover 7 slides into the upper part of the check ring 61 through the notch 62 of the connection plate 6, the check ring 61 is matched with the protrusion 71, the protection cover 7 can be lifted, the protection cover 7 is rotated by 90 degrees, the protrusion 71 falls into the groove 63 of the check ring 61, and therefore the protection cover 7 can be fixed on the check ring 61 of the connection plate 6 without falling off.

When the utility model is specifically used, a first positioning hole on the main board 1 to be welded and positioned passes through the elastic support component 4 by a manual or mechanical arm and is placed in the accommodating groove 31 of the main frame 3, and the main board 1 is pressed and positioned by rotating the limiting piece 8. Then, according to the design requirement, the second positioning holes on the power module 2 to be positioned are sequentially supported on the support columns 421 after passing through the limit columns 422. After that, the pressing plate 5 is buckled with the main frame 3, the first magnetic piece 51 and the second magnetic piece 32 firmly buckle the pressing plate 5 with the main frame 3, and the positioning and the height setting of the power module 2 are completed. The positioning welding tool enters the selective welding equipment through the assembly line to perform automatic welding, and is output to the next disassembly station after welding, the pressing plate 5 and the main frame 3 are disconnected by a mechanical arm or manually and are connected by magnetic attraction, the limiting piece 8 is twisted, the welded main plate 1 is taken out, and the welding is completed.

In the description of the present utility model, it should be understood that the terms "center", "front, rear, upper, lower, left, right", "horizontal, vertical, horizontal", and "top, bottom", etc. generally refer to an orientation or a positional relationship based on that shown in the drawings, only for convenience of describing the present utility model and simplifying the description, and that these orientation words do not indicate or imply that the apparatus or elements referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (12)

1. A flexible fixed-position welding frock, its characterized in that includes:

a main frame (3) for mounting a main board (1), the main board (1) having a first positioning hole corresponding to an assembly position of the power module (2);

the elastic support assemblies (4) are arranged on the bottom surface of the main frame (3), the tops of the elastic support assemblies (4) penetrate through the first positioning holes to form support positions for the power modules (2), and the power modules (2) can lift and move on the elastic support assemblies (4);

the pressing plate (5) is arranged on the top surface of the main frame (3) and is provided with a pressing position and a non-pressing position, and when the pressing plate (5) moves to the pressing position, the power module (2) arranged on the elastic supporting component (4) is pressed downwards.

2. The flexible tack weld tool of claim 1, wherein: further comprises:

the two ends of the connecting plate (6) are connected with the bottom surface of the main frame (3), and a plurality of elastic supporting components (4) are arranged on the connecting plate (6) at intervals.

3. The flexible tack weld tool of claim 2, wherein: the elastic support assembly (4) comprises:

an elastic piece (41) vertically arranged on the connecting plate (6);

and the support piece (42) is used for installing the power module (2), and the support piece (42) is detachably connected to the movable end of the elastic piece (41).

4. A flexible tack weld tool as in claim 3 wherein: the power module (2) has a second positioning hole, and the support (42) includes:

a support column (421) connected to the elastic member (41), the top surface of the support column (421) forming a support for the power module (2);

and the limiting column (422) is overlapped on the top surface of the supporting column (421) and is suitable for the second positioning hole of the power module (2) to pass through.

5. A flexible tack weld tool as in claim 3 wherein: the connecting plate (6) is provided with a mounting hole, and the elastic piece (41) is a spring thimble arranged in the mounting hole.

6. The flexible tack weld tool of claim 5, wherein: the mounting hole runs through connecting plate (6) setting, the spring thimble includes:

the sleeve (411) is embedded in the mounting hole, and the bottom end of the sleeve (411) extends inwards to form a circle of annular blocking edge;

the guide post (412) is provided with a large-diameter section and a small-diameter section which are distributed up and down, the large-diameter section is connected with the sleeve (411) in a sliding fit manner, and the small-diameter section at least partially extends out of the blocking edge of the sleeve (411);

the spring (413) is sleeved on the small-diameter section of the guide post (412) and is positioned between the large-diameter section and the blocking edge;

a clamp spring (414) sleeved on the small-diameter section extending out of the blocking edge;

the support (42) is detachably connected to the top end of the large diameter section of the guide post (412).

7. The flexible tack weld tool of claim 6, wherein: the spring thimble is characterized by further comprising a protective cover (7), wherein the protective cover (7) is arranged on the bottom surface of the connecting plate (6) and used for covering the spring thimble.

8. The flexible tack weld tool of claim 7, wherein: the number of the protective covers (7) is consistent with that of the spring ejector pins, and the protective covers (7) are detachably connected to the bottom surface of the connecting plate (6).

9. The flexible tack weld tool of claim 8, wherein: the bottom surface of the connecting plate (6) is provided with a ring sleeve connected with the mounting hole, the bottom end of the ring sleeve is provided with a retainer ring (61) extending outwards along the radial direction, two notches (62) are symmetrically arranged on the peripheral wall of the retainer ring (61) along the circumferential direction of the retainer ring (61), two grooves (63) are symmetrically arranged on the top surface of the retainer ring (61), and the grooves (63) and the notches (62) are staggered;

the protection casing (7) is the confined cylinder casing of bottom, the internal diameter of cylinder casing with the external diameter phase-match of retaining ring (61), just the inner wall on the top of cylinder casing is provided with two archs (71) along circumference symmetry, arch (71) can pass through breach (62) to after rotatory certain angle, by recess (63) block.

10. The flexible tack weld tool of claim 1, wherein: the inner wall of the main frame (3) is provided with a containing groove (31) for containing the main board (1),

the top surface interval of main frame (3) is provided with a plurality of locating parts (8), locating part (8) can rotate on main frame (3) with spacing mainboard (1) in accommodation groove (31).

11. The flexible tack weld tool of claim 1, wherein: the top surface of the main frame (3) is also provided with a hinging seat (9);

one side of the pressing plate (5) is hinged on the hinged seat (9) so that the pressing plate (5) can be turned over relative to the main frame (3).

12. The flexible tack weld tool of claim 11, wherein: the pressing plate (5) is provided with a first magnetic piece (51), the main frame (3) is provided with a second magnetic piece (32), and when the pressing plate (5) is turned to a pressing position, the first magnetic piece (51) and the second magnetic piece (32) are attracted to each other.