CN220698679U - Expansion and contraction jig and processing equipment - Google Patents

Abstract

The application provides an expansion jig and processing equipment, wherein the expansion jig comprises an expansion core and an expansion sleeve, the expansion core is sleeved on the expansion sleeve, the expansion sleeve comprises a plurality of expansion pieces capable of expanding and moving along the radial direction of the expansion core, the expansion cores are arranged at intervals in a surrounding mode, and the expansion cores are abutted with the expansion pieces to drive the expansion pieces to expand and contract along the radial direction of the expansion cores; the expansion output side of at least one expansion piece is provided with a positioning piece protruding out of the expansion piece along the expansion direction of the expansion piece, and the positioning piece is used for being matched with a corresponding notch on the workpiece to position the workpiece. The expansion output side of at least one expansion part of the expansion jig provided by the application is provided with a positioning part protruding out of the expansion part along the expansion direction of the expansion part, the positioning part can be in positioning fit with corresponding notches on a plurality of workpieces, the positioning part and the corresponding notches on the plurality of workpieces are in positioning fit, a plurality of workpieces can be aligned or primarily aligned along the axial notches of the expansion core, and the coaxial and aligned product along the axial direction of the expansion core can be obtained.

Description

Expansion and contraction jig and processing equipment

Technical Field

The application belongs to the technical field of machining, and more specifically relates to an expanding and shrinking jig and machining equipment.

Background

With the development of new energy, the market demand for driving devices such as motors is increasing, so that the manufacturing industry is promoted to accelerate the automatic production pace. The structure of the motor mainly comprises a rotor and a stator, wherein the stator is a static part of a motor body and consists of a magnetic conductive stator core, an electric drive winding, a fixed iron core, a plurality of parts for the winding, insulating materials, a lead-out part and the like, wherein the stator core is generally formed by stacking and welding a plurality of silicon steel sheets, and an expanding and contracting jig is adopted for assisting in the manufacturing process of the stator core so that the plurality of silicon steel sheets can be concentrically stacked. And traditional expansion tool expands to the concentric state back to multi-disc silicon steel sheet, and the staggered condition often appears in the kinking groove, hinders the kinking, often needs manual intervention, so leads to the uncontrollable and inefficiency of stator core precision that obtains.

Therefore, how to improve the manufacturing accuracy and efficiency of the stator core is to be solved.

Disclosure of Invention

The application provides an expansion jig can promote stator core's manufacturing accuracy and efficiency.

The technical scheme that this application adopted is: the expansion jig comprises an expansion core and an expansion sleeve, wherein the expansion core is sleeved with the expansion sleeve, the expansion sleeve comprises a plurality of expansion pieces capable of expanding and moving along the radial direction of the expansion core, the expansion core is surrounded by the expansion pieces at intervals, and the expansion core is abutted with the expansion pieces to drive the expansion pieces to expand and contract along the radial direction of the expansion core; and the expansion output side of at least one expansion piece is provided with a positioning piece protruding out of the expansion piece along the expansion direction of the expansion piece, and the positioning piece is used for being matched with a corresponding notch on a workpiece so as to position the workpiece.

Further, the positioning piece comprises a positioning part and a guiding part, and the positioning part and the guiding part are sequentially arranged on the expansion output side of the expansion piece along the expansion direction corresponding to the expansion piece; the positioning part is used for being matched with a corresponding notch on a workpiece to position the workpiece, and the guiding part is used for guiding the positioning part to be matched with the notch.

Further, the thickness of the positioning part is larger than that of the guiding part, and the joint surface of the positioning part and the guiding part adopts inclined chamfer or arc chamfer transition.

Further, an installing groove is concavely formed in the expanding output side of the expanding and contracting piece, and the positioning piece is detachably arranged in the installing groove.

Further, the positioning piece further comprises a base body, the positioning portion is arranged on the base body along the expanding direction of the expanding and contracting piece, the base body is detachably arranged in the mounting groove, and the base body and the mounting groove are respectively abutted to two sides of the circumference of the expanding core.

Further, at least one end of the mounting groove along the axial direction of the expansion core is communicated with the corresponding expansion and contraction piece, at least one end of the base body along the axial direction of the expansion core is in a sharp angle shape, and the base body is inserted into the mounting groove from the communicated end of the mounting groove through the sharp angle end.

Further, the expansion jig further comprises a limiting assembly, the limiting assembly is arranged on the end side of the expansion core along the axial direction of the expansion core, a convex plate which is arranged on the limiting assembly along the axial direction of the expansion core and faces to the expansion core and is convex towards the expansion core, the convex plate surrounds the expansion core along the circumferential direction of the expansion core, and the expansion members are respectively and elastically connected with the convex plate along the corresponding expansion direction.

Further, the limiting assembly comprises a first limiting piece and a second limiting piece, the first limiting piece is arranged on one side of the plurality of expansion and contraction pieces along the axial direction of the expansion core, the second limiting piece is arranged on the other side of the plurality of expansion and contraction pieces along the axial direction of the expansion core, and the convex plates are respectively arranged on the first limiting piece and the second limiting piece; the first limiting piece is connected with the second limiting piece through a connecting piece, and the connecting piece penetrates through at least one circumferential interval among the plurality of expansion pieces.

Further, the expanding and shrinking jig further comprises a sensing piece, a reflecting piece and a stop block which is fixedly connected with the expanding core relatively, wherein the sensing piece is in inductive fit with the reflecting piece and is arranged on two sides of the expanding core relatively along the radial direction of the expanding core; when the plurality of expansion and contraction pieces are in a contracted state, the sensing piece is in inductive fit with the reflecting piece; when the expansion core moves along the axial direction of the expansion core to expand the plurality of expansion and contraction pieces, the stop block can cut off the induction fit between the sensing piece and the reflecting piece.

Further, the plurality of expansion and contraction pieces are arranged around the circumference of the expansion core at equal included angles, each expansion and contraction piece is provided with one positioning piece, and the positioning pieces axially divide the expansion and contraction output sides of the corresponding expansion and contraction pieces equally along the expansion core; a spring which is elastically arranged along the corresponding expanding and contracting direction is arranged between each expanding and contracting piece and one convex plate, and when the expanding and contracting piece is in an expanding and contracting state, the corresponding spring is in a compressed state; the expanding and shrinking jig further comprises a mounting seat and a driving piece, the driving piece is arranged on the mounting seat, the expanding core is movably connected to the mounting seat along the axial direction of the expanding core, the driving piece is in driving connection with the expanding core, the expanding and shrinking sleeve is arranged on one side of the mounting seat along the axial direction of the expanding core, the first limiting piece is arranged on one side of the plurality of expanding and shrinking pieces along the axial direction of the expanding core, which is close to the mounting seat, the first limiting piece is connected with the mounting seat, the second limiting piece is arranged on one side of the plurality of expanding and shrinking pieces along the axial direction of the expanding core, which is far away from the first limiting piece, and the second limiting piece is arranged on the axial end part of the expanding and shrinking jig in a sealing mode; the connecting piece comprises a plurality of connecting rods, the first limiting piece and the second limiting piece are connected through the connecting rods, and each connecting rod penetrates through the circumferential interval between two adjacent expansion pieces.

The application also provides processing equipment, including welding set and as above expand and contract tool, welding set is used for the welding warp expand the work piece after the position is expanded to expand to contract the tool.

In the expansion jig, the expansion sleeve is sleeved outside the expansion core, the expansion pieces of the expansion sleeve are respectively surrounded on the circumference of the expansion core, the expansion pieces are always abutted against the expansion core, the axial side wall of the expansion core can prop up and drive the expansion pieces to expand and move outwards along the radial directions of the expansion cores respectively corresponding to the expansion pieces by controlling the expansion core to move along the axial directions of the expansion core, and when the outer side of the expansion sleeve is sleeved with the workpieces which are stacked along the axial directions of the expansion cores, the expansion of the expansion pieces can act on the workpieces which are stacked to be positioned concentrically; and through controlling the expansion core to move along another axial direction of the expansion core, the expansion core gradually withdraws the supporting action force to a plurality of expansion and contraction pieces along with the movement of the expansion core, so that the expansion and contraction pieces can radially and simultaneously retract and move inwards along the expansion core corresponding to the expansion and contraction pieces, and when the expansion and contraction pieces retract to a state of separating from the workpiece, the workpiece which is positioned concentrically can be taken out, and the workpiece which is to be positioned concentrically can be sleeved again. The expansion cores are arranged at intervals of the expansion pieces, and the expansion pieces are always in an interval state in the expansion and contraction process, so that interference or abrasion between adjacent expansion pieces is avoided.

Further, the expansion output side of at least one expansion piece is provided with a positioning piece protruding from the expansion piece along the expansion direction of the expansion piece, the expansion output side of the expansion piece is the end side of the expansion piece for acting on a workpiece, at least one of the expansion pieces is provided with the positioning piece, the positioning piece can be in positioning fit with a corresponding notch on the workpiece, in the process that the workpieces are sleeved outside the expansion sleeve, the positioning piece is in positioning fit with the corresponding notch on the workpieces, the workpieces can be aligned or primarily aligned along the axial notch of the expansion core, and the workpieces are expanded to be in a concentric state by controlling the expansion of the expansion pieces, so that the coaxial and aligned product along the axial direction of the expansion core can be obtained.

Specifically, when the expansion jig is used for stator core production, the multiple silicon steel sheets for manufacturing the stator core are sleeved outside the expansion sleeve in a stacking mode, meanwhile, a winding opening on each silicon steel sheet is matched with a positioning piece in a positioning mode, after the silicon steel sheets are placed in place, the multiple silicon steel sheets are expanded to be in a concentric state through controlling the expansion and expansion of the multiple expansion and contraction pieces, winding openings of the multiple silicon steel sheets form winding grooves along the axial direction of the expansion core through the positioning piece positioning effect, and winding grooves on the stator core produced by the expansion jig are tidy, the winding grooves on the stator core do not need to be corrected through manual intervention, and the winding process can be directly entered, so that the manufacturing precision and efficiency of the stator core are improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required for the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic perspective view of an expanding and contracting jig according to an embodiment of the present application;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1

FIG. 3 is a schematic diagram of the fitting of the expansion and contraction member and the positioning member;

FIG. 4 is a schematic diagram of a stacked workpiece sleeved on the expansion fixture;

fig. 5 is a schematic block diagram of a processing apparatus used in an embodiment of the present application.

Wherein, each reference sign in the figure:

10. expansion and contraction jig; 11. an expansion core; 12. a swelling and shrinking sleeve; 13. an expansion and contraction member; 14. a positioning piece; 15. a positioning part; 16. a guide part; 17. a mounting groove; 18. a base; 19. a limit component; 20. a convex plate; 21. a first limiting member; 22. a second limiting piece; 23. a connecting piece; 24. a spring; 25. a sensor member; 26. a light reflecting member; 27. a stop block; 28. a mounting base; 29. a driving member; 30. processing equipment; 31. and welding the assembly.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clear, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and simplify description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Referring to fig. 1 and 2, an expanding and contracting jig 10 according to an embodiment of the present application will be described. The expansion jig 10 provided by the embodiment of the application comprises an expansion core 11 and an expansion sleeve 12, wherein the expansion core 11 is sleeved on the expansion sleeve 12, the expansion sleeve 12 comprises a plurality of expansion pieces 13 capable of expanding and moving along the radial direction of the expansion core 11, the expansion cores 11 are surrounded by the expansion pieces 13 at intervals, and the expansion core 11 is abutted with the expansion pieces 13 to drive the expansion pieces 13 to expand and contract along the radial direction of the expansion core 11; the expansion output side of at least one expansion member 13 is provided with a positioning member 14 protruding from the expansion member 13 along the expansion direction of the expansion member 13, and the positioning member 14 is used for being matched with a corresponding notch on the workpiece to position the workpiece.

In the expansion jig 10, an expansion sleeve 12 is sleeved outside an expansion core 11, a plurality of expansion pieces 13 of the expansion sleeve 12 are respectively surrounded on the circumference of the expansion core 11, the expansion pieces 13 are always abutted against the expansion core 11, the expansion core 11 is controlled to move along the axial direction of the expansion core, the axial side wall of the expansion core 11 can prop up and drive the expansion pieces 13 to expand and move outwards along the radial directions of the expansion cores 11 respectively corresponding to the expansion pieces, and when the outer side of the expansion sleeve 12 is sleeved with workpieces which are stacked and placed along the axial direction of the expansion core 11, the expansion and expansion of the expansion pieces 13 can act on the stacked and placed workpieces to be in a concentric positioning state; and through controlling the expansion core 11 to move along the other axial direction, along with the movement of the expansion core 11, the expansion core 11 gradually withdraws the supporting action force to the plurality of expansion and contraction pieces 13, so that the plurality of expansion and contraction pieces 13 can simultaneously shrink and move inwards along the radial directions of the expansion cores 11 corresponding to the expansion and contraction pieces, and when the plurality of expansion and contraction pieces 13 shrink to a state of being separated from a workpiece, the workpiece which is positioned concentrically can be taken out, and the workpiece which is to be positioned concentrically can be sleeved again. The expansion cores 11 are surrounded by the expansion pieces 13 at intervals, and the expansion pieces 13 are always in an interval state in the expansion and contraction process, so that interference or abrasion between adjacent expansion pieces 13 is avoided.

Further, the expansion output side of at least one expansion member 13 is provided with a positioning member 14 protruding from the expansion member 13 along the expansion direction of the expansion member 13, the expansion output side of the expansion member 13 is the end side of the expansion member 13 for acting on the workpiece, at least one of the expansion members 13 is provided with the positioning member 14, the positioning member 14 can be in positioning fit with a corresponding notch on the workpiece, in the process of sleeving the plurality of workpieces outside the expansion sleeve 12, the positioning member 14 and the corresponding notch on the plurality of workpieces can be aligned or primarily aligned along the axial notch of the expansion core 11, and the plurality of workpieces can be expanded to a concentric state by controlling the expansion of the plurality of expansion members 13, so that a product concentric and aligned along the axial direction of the expansion core 11 can be obtained.

Specifically, when the expanding and shrinking jig 10 is used in stator core production, the plurality of silicon steel sheets for manufacturing the stator core are sleeved outside the expanding and shrinking sleeve 12 in a stacking manner, meanwhile, a winding opening on each silicon steel sheet is matched with the positioning piece 14 in a positioning manner, after the silicon steel sheets are placed in place, the plurality of silicon steel sheets are expanded to be in a concentric state by controlling the expanding and shrinking pieces 13, and winding openings of the plurality of silicon steel sheets form winding grooves along the axial direction of the expanding core 11 through the positioning effect of the positioning piece 14, and the winding grooves on the stator core produced by the expanding and shrinking jig 10 are tidy without manual intervention, so that the winding grooves on the stator core can be corrected, and the winding process can be directly entered, thereby improving the manufacturing precision and efficiency of the stator core.

In the above embodiment, the positioning member 14 may include the positioning portion 15 and the guiding portion 16, and the positioning portion 15 and the guiding portion 16 are sequentially disposed on the expansion output side of the expansion member 13 along the expansion direction of the corresponding expansion member 13; the positioning part 15 is used for being matched with a corresponding notch on the workpiece to position the workpiece, and the guiding part 16 is used for guiding the positioning part 15 to be matched with the notch.

When the plurality of expansion and contraction pieces 13 are in a completely contracted state, namely in an initial state, a plurality of workpieces are sleeved outside the expansion and contraction sleeve 12 in a laminated mode, gaps on the workpieces are matched with the guide parts 16 of the positioning pieces 14, the guide parts 16 are matched with the gaps to perform a preliminary positioning function on the workpieces, and the fact that certain matching gaps along the circumference of the expansion core 11 exist after the guide parts 16 are matched with the gaps of the workpieces can be understood that certain dislocation conditions exist along the circumference of the expansion core 11 on the gaps on the plurality of workpieces in the state that the guide parts 16 are matched with the gaps of the workpieces. Along with the gradual expansion of the expansion and contraction pieces 13, the positioning piece 14 gradually feeds to the inner side of the notch along the expansion and contraction direction of the corresponding expansion and contraction piece 13, namely the guide part 16 gradually guides the positioning part 15 to be matched with the notch, and after the positioning part 15 is matched with the notch of the workpiece, a fit clearance does not exist, namely the positioning is accurately positioned, along with the gradual expansion and contraction of the expansion and contraction piece 13, the expansion and contraction matched guide part 16 gradually guides the positioning part 15 to be matched with the notch, so that the positioning part 15 straightens the notch of the plurality of workpieces along the axial direction of the expansion core 11, and a product concentric and aligned along the axial direction of the expansion core 11 is obtained.

Wherein, the thickness H1 of the positioning portion 15 is greater than the thickness H2 of the guiding portion 16, and the joint surface of the positioning portion 15 and the guiding portion 16 adopts an inclined chamfer or an arc chamfer transition. Thickness H1 of location portion 15 and the thickness H2 of guide portion 16 and the width of breach are along the circumference size of expanding core 11, thickness H2 setting of guide portion 16 is less than the width of breach on the work piece, can make things convenient for the breach of work piece and the preliminary location cooperation of setting element 14, and the thickness H1 of location portion 15 is greater than or equal to the width of the breach of work piece, can be used for carrying out the fine positioning to the work piece, wherein the joint surface of location portion 15 and guide portion 16 adopts the joint setting that has the guiding effect, this application embodiment takes slope chamfer or arc chamfer transition setting as the example, so that guide portion 16 will locate portion 15 guide to with the breach cooperation.

In the above embodiment, the expansion output side of the expansion member 13 may be concavely provided with the mounting groove 17, and the positioning member 14 may be detachably disposed in the mounting groove 17. The mounting groove 17 is concavely formed in the expansion member 13, so that the expansion member 13 can be used as a base for a workpiece, the mounting position can be provided for the positioning member 14, and the positioning member 14 can be detachably arranged in a bolt connection mode or a buckle connection mode, so that the positioning member 14 with larger abrasion can be replaced, and the positioning accuracy is ensured.

The positioning element 14 may further include a base 18, the positioning portion 15 is disposed on the base 18 along the expanding direction of the expanding and contracting element 13, the base 18 is detachably disposed in the mounting groove 17, and the base 18 and the mounting groove 17 are respectively abutted to each other along two sides of the circumference of the expanding core 11. The thickness H3 of the base 18 of the positioning member 14 is thicker than that of the positioning portion 15, and the structural strength of the base 18 is higher than that of the positioning portion 15, so as to provide a stronger structural stability for the positioning portion 15, and the positioning portion 15 and the base 18 may be integrally formed or fixedly connected, and in this embodiment, the positioning member 14 is integrally formed. Setting the dimension of the base 18 along the circumferential direction of the core 11, namely the thickness H3, to be greater than or equal to the circumferential dimension W1 of the mounting groove 17 along the core 11, and when the dimension H3 of the base 18 along the circumferential direction of the core 11 is greater than the circumferential dimension W1 of the mounting groove 17 along the core 11, the base 18 is in interference fit with the mounting groove 17; when the size H3 of the base body 18 along the circumferential direction of the expansion core 11 is equal to the size W1 of the mounting groove 17 along the circumferential direction of the expansion core 11, the base body 18 is embedded with the mounting groove 17, and by adopting the two types of matching, the mounting groove 17 can play a role in accurately limiting the structure of the base body 18, so that the mounting groove 17 plays a role in fixing the positioning piece 14 and improves the structural stability of the positioning piece 14.

In the above embodiment, at least one end of the mounting groove 17 along the axial direction of the expansion core 11 is provided through the corresponding expansion member 13, at least one end of the base 18 along the axial direction of the expansion core 11 is provided in a tapered shape, and the base 18 is inserted into the mounting groove 17 from the through end of the mounting groove 17 through the tapered end. At least one end of the mounting groove 17 is communicated along the axial direction of the expansion core 11, at least one end of the base body 18 along the axial direction of the expansion core 11 is in a sharp angle shape or other shapes capable of guiding the insertion of the base body 18 from the communicated end of the mounting groove 17, so that the mounting is only required to insert one end of the base body 18 into the mounting groove 17 and then force to continuously act on the base body 18 until the base body 18 is completely inserted, the positioning part 15 and the guide part 16 are not required to act, and the mounting is simple and convenient.

Further, the expanding and contracting jig 10 in the above embodiment may further include a limiting assembly 19, the limiting assembly 19 is disposed on an end side of the plurality of expanding and contracting members 13 along the axial direction of the expanding core 11, the limiting assembly 19 is provided with a convex plate 20 along the axial direction of the expanding core 11 and protruding toward the plurality of expanding and contracting members 13, the convex plate 20 is circumferentially provided with the plurality of expanding and contracting members 13 along the circumferential direction of the expanding core 11, and the plurality of expanding and contracting members 13 are respectively elastically connected with the convex plate 20 along the corresponding expanding and contracting directions. The limiting component 19 can be of an integrally formed structure or a detachable structure, the limiting component is not limited in this aspect, the limiting component is applicable, the convex plates 20 on the limiting component 19 can be whole plates with closed heads and tails, the convex plates 20 arranged in a surrounding mode can also be arranged at intervals, the convex plates 20 are used as limiting supports, the plurality of expansion and contraction pieces 13 are elastically connected with the convex plates 20 along the corresponding expansion and contraction directions, and accordingly the limiting component can be contracted under the elastic action in the contraction process of the expansion and contraction pieces 13, and the problem that the loading and unloading are affected due to the fact that the expansion and contraction pieces 13 are not driven by the expansion cores 11 in the contraction process is avoided. The limiting component 19 may be disposed at one end side or two end sides of the plurality of expansion members 13 along the axial direction of the expansion core 11, and is specifically determined according to actual needs, so that the position of the limiting component 19 is set to be capable of elastically matching with the plurality of expansion members 13 under the condition of not interfering the expansion and contraction movement of the plurality of expansion members 13, and the elastic connection between the expansion members 13 and the convex plate 20 may be set by adopting a spring or other elastic devices, so that the expansion members 13 are driven by elastic force in the contraction process.

In the above embodiment, the limiting assembly 19 may include a first limiting member 21 and a second limiting member 22, where the first limiting member 21 is disposed at one end side of the plurality of expansion members 13 along the axial direction of the expansion core 11, the second limiting member 22 is disposed at the other end side of the plurality of expansion members 13 along the axial direction of the expansion core 11, and the convex plates 20 are respectively disposed on the first limiting member 21 and the second limiting member 22; the first limiting member 21 and the second limiting member 22 are connected by a connecting member 23, and the connecting member 23 is arranged to penetrate at least one circumferential space between the plurality of expansion members 13. In this embodiment, it can be understood that the limiting component 19 is disposed at two axial end sides of the expansion core 11 of the expansion members 13, specifically, the first limiting component 21 is disposed at one axial end side of the expansion members 13 along the expansion core 11, and the second limiting component 22 is disposed at the other axial end side of the expansion members 13 along the expansion core 11, so that one axial end of the expansion members 13 along the expansion core 11 is elastically connected with the convex plate 20 on the first limiting component 21, and the other axial end of the expansion members 13 along the expansion core 11 is elastically connected with the convex plate 20 on the second limiting component 22, thereby enabling the expansion member 13 to be subjected to symmetrical elastic action and contributing to improving the stress stability of the structure.

The first limiting piece 21 and the second limiting piece 22 are connected by adopting the connecting piece 23, the overall structural stability of the limiting assembly 19 is improved, the stable support during elastic action is facilitated for the plurality of expansion pieces 13, the connecting piece 23 penetrates through the circumferential intervals between the plurality of expansion pieces 13 to connect the first limiting piece 21 and the second limiting piece 22 so as to avoid interference of expansion movement and feeding and discharging of the expansion pieces 13, the connecting piece 23 can only penetrate through the circumferential intervals between two adjacent expansion pieces 13, and also can penetrate through the circumferential intervals between the plurality of adjacent expansion pieces 13 without limitation, so that the device is applicable.

In an embodiment, the expanding and shrinking fixture 10 further includes a sensing element 25, a reflective element 26, and a stop block 27 relatively and fixedly connected to the expanding core 11, where the sensing element 25 and the reflective element 26 are inductively matched and disposed on two sides of the expanding core 11 along the radial direction of the expanding core 11; when the plurality of expansion and contraction pieces 13 are in a contracted state, the sensing piece 25 is in inductive fit with the reflecting piece 26; when the expansion core 11 moves along the axial direction of the expansion core 11 to expand the plurality of expansion and contraction members 13, the stop block 27 can cut off the induction fit between the sensing member 25 and the reflecting member 26.

The sensing element 25 may be a photoelectric sensor capable of emitting and sensing light, the reflecting element 26 may be a reflective mirror disposed opposite to the photoelectric sensor, and the initial sensing state in this embodiment may be a light sensing state of the photoelectric sensor, or an interrupt sensing state of the photoelectric sensor, where the two conditions depend on the actual positions of the sensing element 25 and the reflecting element 26 relative to the expansion core 11, and the embodiment uses the light sensing state of the photoelectric sensor as the initial sensing state, and the plurality of expansion and contraction elements 13 are in a fully contracted state when the sensing element 25 is in the initial sensing state. The stop block 27 which is fixedly arranged opposite to the expansion core 11 is arranged between the sensing piece 25 and the reflecting piece 26, when the sensing piece 25 is in a sensing initial state, the stop block 27 is in a transmitting light path or a receiving light path which does not cover the sensing piece 25, and the stop block 27 gradually advances and covers the transmitting light path or the receiving light path of the sensing piece 25 in the expansion process of driving the expansion pieces 13 along the axial movement of the expansion core 11, so that the sensing of the sensing piece 25 is interrupted, and in the automatic operation, the sensing on/off of the sensing piece 25 can be used for feeding back the current working state so as to know the working dynamics of the expansion jig 10.

Of course, the sensing element 25 and the reflecting element 26 may be arranged at intervals along the axial direction of the expansion core 11, so as to feedback the moving distance of the expansion core 11, thereby facilitating understanding of expansion degrees of the expansion elements 13; the stop 27 may be replaced by an arrangement of an elongate expansion core 11.

In an embodiment, a plurality of expansion and contraction members 13 are enclosed along the circumference of the expansion core 11 at equal angles, each expansion and contraction member 13 is provided with a positioning member 14, and the positioning members 14 axially divide the expansion and contraction output sides of the corresponding expansion and contraction members 13 in a bisection manner along the expansion core 11. The expansion and contraction pieces 13 are arranged around the expansion core 11 along the circumferential direction of the expansion core at equal included angles so as to have equal effect on each direction when expanding and acting on the workpieces, thereby being beneficial to the concentric positioning of the workpieces; and each expansion and contraction piece 13 is provided with a positioning piece 14, and a plurality of positioning pieces 14 are used for positioning a workpiece at the same time, so that the positioning accuracy is facilitated, and the extrusion acting force in the positioning process can be differentiated through the plurality of positioning pieces 14, so that the damage to each positioning piece 14 is reduced. Each positioning element 14 is disposed in the middle of the corresponding expansion element 13, that is, the parts of the corresponding expansion element 13 located at two sides of the positioning element 14 along the circumferential direction of the expansion core 11 are symmetrical with respect to the positioning element 14, so that the two symmetrical parts of the expansion element 13 with respect to the corresponding positioning element 14 have the same effect when acting on the workpiece, and the fixing effect on the positioning element 14 is the same, which is helpful for reducing the probability of local deformation caused by stress of the structure.

A spring 24 which is elastically arranged along the corresponding expanding and contracting direction is arranged between each expanding and contracting piece 13 and a convex plate 20, and when the expanding and contracting piece 13 is in an expanding state, the corresponding spring 24 is in a compressed state; the first limiting upper protruding plate 20 in this embodiment may be set in one-to-one correspondence with the number of the plurality of expansion members 13, or may be set to be a coaming structure with closed ends, and of course, the second limiting upper protruding plate 20 may also be set in one-to-one correspondence with the number of the plurality of expansion members 13, or be set to be a coaming structure with closed ends, where, as the expansion members 13 expand, the spring 24 is gradually set by a compression and accumulation force, so that the expansion core 11 is always propped against the plurality of expansion members 13 by using the elastic force of the spring 24 when the expansion members 13 contract. The elastic two ends of the spring 24 can directly act on the expansion and contraction member 13 and the convex plate 20 respectively, or can be indirectly connected by adopting an intermediate connecting member, so that the elastic two ends are not limited.

The expanding and shrinking jig 10 can further comprise a mounting seat 28 and a driving piece 29, the driving piece 29 is arranged on the mounting seat 28, the expanding core 11 is movably connected to the mounting seat 28 along the axial direction of the expanding core 11, the driving piece 29 is in driving connection with the expanding core 11, the expanding and shrinking sleeve 12 is arranged on one side of the mounting seat 28 along the axial direction of the expanding core 11, the first limiting piece 21 is arranged on one side of the plurality of expanding and shrinking pieces 13 along the axial direction of the expanding core 11, which is close to the mounting seat 28, the first limiting piece 21 is connected with the mounting seat 28, the second limiting piece 22 is arranged on one side of the plurality of expanding and shrinking pieces 13 along the axial direction of the expanding core 11, which is far away from the first limiting piece 21, and the second limiting piece 22 is arranged at the axial end part of the expanding and shrinking jig 10 in a sealing manner; the connecting piece 23 comprises a plurality of connecting rods, the first limiting piece 21 and the second limiting piece 22 are connected through the plurality of connecting rods, and each connecting rod penetrates through the circumferential interval between two adjacent expansion pieces 13.

The expansion core 11 is arranged on the mounting seat 28, specifically, the expansion core 11 is movably arranged on the mounting seat 28 in a penetrating manner, one end of the expansion core 11 protrudes out of the mounting seat 28, the expansion sleeve 12 is sleeved on the protruding end of the expansion core 11, and the expansion core 11 is driven by the driving piece 29 to move relative to the mounting seat 28 so as to realize synchronous expansion or contraction of the expansion pieces 13 on the expansion sleeve 12. The first limiting piece 21 is fixedly connected with the mounting seat 28, and the structural stability of the first limiting piece 21 is increased by utilizing the mounting seat 28, so that the convex plate 20 on the first limiting piece 21 is helped to provide stable elastic fit for the expanding and contracting piece 13. The second limiting piece 22 is opposite to the first limiting piece 21, the second limiting piece 22 is arranged at the end part of the expansion core 11, far away from the mounting seat 28, the first limiting piece 21 and the second limiting piece 22 are connected through a plurality of connecting rods to be relatively fixed, the first limiting piece 21 is fixed with the mounting seat 28, and therefore the second limiting piece 22 can also indirectly realize stable structure by means of the mounting seat 28, so that the convex plate 20 on the second limiting piece 22 is conducive to providing stable elastic fit for the expansion piece 13, the number of the connecting rods is equal to the number of the spacing positions of the expansion pieces 13, and of course, the plurality of spacing positions are equally spaced along the circumferential direction of the expansion core 11, so that the second limiting piece 22 can be uniformly fixed along the circumferential direction of the expansion core 11.

The embodiment of the application also provides a processing device 30, which comprises a welding assembly 31 and the expansion jig 10 as described above, wherein the welding assembly 31 is used for welding a workpiece after expansion positioning of the expansion jig 10.

The workpiece can be silicon steel sheets for manufacturing the stator core, the expansion and expansion effect of the stacked silicon steel sheets is utilized by the expansion and contraction jig 10 to obtain a concentric and wire winding port alignment state along the direction of the expansion core 11, and then a plurality of silicon steel sheets are welded by controlling a welding head of the welding assembly 31 to obtain the stator core.

The processing device 30 in this embodiment includes the expansion and contraction tool 10 in any embodiment, so that the beneficial effects brought by the expansion and contraction tool 10 in any embodiment are not described herein.

The foregoing description of the preferred embodiments of the present application is not intended to be limiting, but is intended to cover any and all modifications, equivalents, and alternatives falling within the spirit and principles of the present application.

Claims (11)

1. The utility model provides a shrink tool which characterized in that includes:

an expansion core; and

the expansion sleeve is sleeved with the expansion core and comprises a plurality of expansion pieces capable of expanding and moving along the radial direction of the expansion core, the expansion core is surrounded by the expansion pieces at intervals, and the expansion core is abutted with the expansion pieces to drive the expansion pieces to expand and contract along the radial direction of the expansion core;

the expansion output side of at least one expansion piece is provided with a positioning piece protruding out of the expansion piece along the expansion direction of the expansion piece, and the positioning piece is used for being matched with a corresponding notch on a workpiece to position the workpiece.

2. The expansion jig according to claim 1, wherein the positioning member comprises a positioning portion and a guiding portion, which are sequentially provided on an expansion output side of the expansion member in an expansion direction corresponding to the expansion member;

the positioning part is used for being matched with a corresponding notch on a workpiece to position the workpiece, and the guiding part is used for guiding the positioning part to be matched with the notch.

3. The expansion and contraction jig according to claim 2, wherein the thickness of the positioning portion is larger than the thickness of the guiding portion, and the joint surface of the positioning portion and the guiding portion adopts an inclined chamfer or an arc chamfer transition.

4. The expansion and contraction jig according to claim 2, wherein the expansion and contraction output side of the expansion and contraction member is concavely provided with a mounting groove, and the positioning member is detachably arranged in the mounting groove.

5. The expansion jig according to claim 4, wherein the positioning member further comprises a base body, the positioning portion is disposed on the base body along the expansion direction of the expansion member, the base body is detachably disposed in the mounting groove, and the base body and the mounting groove are respectively abutted against each other along two circumferential sides of the expansion core.

6. The expansion jig according to claim 5, wherein at least one end of the mounting groove in the axial direction of the expansion core is provided with a corresponding expansion member, at least one end of the base body in the axial direction of the expansion core is provided with a pointed shape, and the base body is inserted into the mounting groove from the provided end of the mounting groove through the pointed end.

7. The expansion jig according to any one of claims 1 to 6, further comprising a limiting assembly, wherein the limiting assembly is arranged on the end side of the expansion members along the axial direction of the expansion core, a convex plate protruding towards the expansion members along the axial direction of the expansion core is arranged on the limiting assembly, the expansion members are arranged around the periphery of the expansion core, and the expansion members are respectively and elastically connected with the convex plate along the corresponding expansion direction.

8. The expansion jig according to claim 7, wherein the limiting assembly comprises a first limiting piece and a second limiting piece, the first limiting piece is arranged on one side of the expansion pieces along the axial direction of the expansion core, the second limiting piece is arranged on the other side of the expansion pieces along the axial direction of the expansion core, and the convex plates are respectively arranged on the first limiting piece and the second limiting piece;

the first limiting piece is connected with the second limiting piece through a connecting piece, and the connecting piece penetrates through at least one circumferential interval among the plurality of expansion pieces.

9. The expansion and contraction jig according to any one of claims 1 to 6, further comprising a sensing member, a reflecting member and a stop block which is fixedly connected with the expansion core relatively, wherein the sensing member and the reflecting member are in inductive fit and are arranged on two sides of the expansion core relatively along the radial direction of the expansion core;

when the plurality of expansion and contraction pieces are in a contracted state, the sensing piece is in inductive fit with the reflecting piece;

when the expansion core moves along the axial direction of the expansion core to expand the plurality of expansion and contraction pieces, the stop block can cut off the induction fit between the sensing piece and the reflecting piece.

10. The expansion and contraction fixture according to claim 8, wherein the expansion and contraction pieces are arranged in a surrounding mode along the circumferential direction of the expansion core at equal included angles, each expansion and contraction piece is provided with one positioning piece, and the positioning piece axially bisects the expansion and contraction output side of the corresponding expansion and contraction piece along the expansion core;

a spring which is elastically arranged along the corresponding expanding and contracting direction is arranged between each expanding and contracting piece and one convex plate, and when the expanding and contracting piece is in an expanding and contracting state, the corresponding spring is in a compressed state;

the expanding and shrinking jig further comprises a mounting seat and a driving piece, the driving piece is arranged on the mounting seat, the expanding core is movably connected to the mounting seat along the axial direction of the expanding core, the driving piece is in driving connection with the expanding core, the expanding and shrinking sleeve is arranged on one side of the mounting seat along the axial direction of the expanding core, the first limiting piece is arranged on one side of the plurality of expanding and shrinking pieces along the axial direction of the expanding core, which is close to the mounting seat, the first limiting piece is connected with the mounting seat, the second limiting piece is arranged on one side of the plurality of expanding and shrinking pieces along the axial direction of the expanding core, which is far away from the first limiting piece, and the second limiting piece is arranged on the axial end part of the expanding and shrinking jig in a sealing mode;

the connecting piece comprises a plurality of connecting rods, the first limiting piece and the second limiting piece are connected through the connecting rods, and each connecting rod penetrates through the circumferential interval between two adjacent expansion pieces.

11. A processing apparatus comprising a welding assembly for welding a workpiece positioned by expanding the expansion jig, and the expansion jig according to any one of claims 1 to 10.