阅读说明：本技术 一种定子铁芯叠装夹具 (Stator core lamination fixture ) 是由 陈志强 王攀利 于 2019-10-30 设计创作，主要内容包括：本申请提供了一种定子铁芯叠装夹具,包括：心轴(1),其外圆上开有键槽；定位键(2),可拆卸安装在心轴(1)的键槽内,定位键(2)包括凸出于心轴(1)外圆表面的条形凸起,将多个冲片零件套装在心轴(1)上,以使所述冲片零件的槽口适配接纳所述条形凸起；垫板(3),安装在心轴(1)上,并位于多个冲片零件的一端；压板(4),安装在心轴(1)上,并位于多个冲片零件的另一端；螺母(5),螺接在心轴(1)上,且位于压板(4)的背离冲片零件的一侧,用于压紧压板(4)。本申请解决了斜槽定子铁芯叠装困难,槽型一致性差的问题,组件的加工质量得到了很大的提高,提高了加工效率。缩短了零件加工周期。(The application provides a stator core closed assembly anchor clamps includes: a mandrel (1) with a key slot on the outer circle; the positioning key (2) is detachably arranged in a key groove of the mandrel (1), the positioning key (2) comprises strip-shaped protrusions protruding out of the outer circle surface of the mandrel (1), and a plurality of punching parts are sleeved on the mandrel (1) so that notches of the punching parts are matched with and receive the strip-shaped protrusions; the backing plate (3) is arranged on the mandrel (1) and is positioned at one end of the punching sheet parts; the pressing plate (4) is arranged on the mandrel (1) and is positioned at the other ends of the punching sheet parts; and the nut (5) is screwed on the mandrel (1), is positioned on one side of the pressing plate (4) departing from the punching sheet part, and is used for pressing the pressing plate (4). The stator core stacking device solves the problems that stator cores of the skewed slots are difficult to stack and the consistency of the slot shapes is poor, greatly improves the processing quality of the assembly, and improves the processing efficiency. The processing period of the parts is shortened.)

1. A stator core lamination anchor clamps which characterized in that includes:

the key groove forming device comprises a mandrel (1), a key groove is formed in the direction forming a set angle with the axial direction of the mandrel on the outer circle of the mandrel;

the punching piece part punching device comprises a positioning key (2) which is detachably arranged in a key groove of a mandrel (1), wherein the positioning key (2) comprises strip-shaped bulges protruding out of the outer circle surface of the mandrel (1), and a plurality of punching piece parts are sleeved on the mandrel (1) so that notches of the punching piece parts are matched with and receive the strip-shaped bulges;

the backing plate (3) is arranged on the mandrel (1) and is positioned at one end of the punching sheet parts;

the pressing plate (4) is arranged on the mandrel (1) and is positioned at the other ends of the punching sheet parts;

and the nut (5) is screwed on the mandrel (1), is positioned on one side of the pressing plate (4) departing from the punching sheet part, and is used for pressing the pressing plate (4).

2. The stator core stacking fixture according to claim 1, wherein the mandrel (1) comprises a limiting plate (11), a stacking section (12) and a pressing section (13) in sequence along an axial direction, the outer diameter of the limiting plate is larger than that of the stacking section (12) and used for limiting axial movement of the backing plate (3), the outer diameter of the stacking section (12) is larger than that of the pressing section (13) and used for installing a positioning key (2) and a punching part, and at least part of the pressing section (13) is provided with external threads.

3. The stator core assembling clamp according to claim 2, wherein a cover plate (6) is arranged between the pressing plate (4) and the punching part, the inner diameter of the cover plate (6) is larger than the outer diameter of the assembling section (12) and smaller than the outer diameter of the pressing plate (4), and the pressing plate (4) can press the cover plate (6) when moving axially along the pressing section (13) of the mandrel.

4. The stator core stacking fixture of claim 1, wherein the set angle is determined according to the size of a chute after lamination of punching parts.

5. The stator core lamination jig according to claim 1, wherein the positioning key (2) is fixed on the mandrel (1) through dovetail fit, the key groove of the mandrel (1) is a dovetail groove, the cross section of the positioning key (2) is provided with two sections with different widths, the positioning key is inserted into the key groove of the mandrel (1) through dovetail fit, and the part with the smaller width is positioned outside the key groove.

Technical Field

The invention belongs to the technical field of stator core processing, and particularly relates to a stator core stacking fixture.

Background

The stator core assembly of the aviation motor is shown in figure 1, a plurality of circumferential grooves are formed in a central through hole close to the inside of the stator core assembly, and the stator core is formed by welding or bonding a plurality of punching sheet parts after being stacked. The problem of uneven groove shapes of the iron cores after being stacked exists in the processing of the stator iron cores. After the stator is machined, the slots need to be repaired repeatedly for two or three times due to poor slot type consistency, the workload is large, the iron core quality is poor, and the machining period is long.

Stator core's groove is certain angle slope along stator core's axial and stator core's axis, can further explain through fig. 2, and fig. 2 is traditional closed assembly anchor clamps structure, adopts pin 7 location to come the closed assembly towards the structure of piece cell type, inserts towards piece cell type closed assembly promptly and forms with the pin 7, and the subassembly clamping process is as follows in anchor clamps: firstly, a base plate 3 is arranged on a mandrel 1, then a pin 7 is arranged in a hole of the base plate 3, then a plurality of punching sheet parts 8 are arranged on the mandrel 1, then a cover plate 6 and a pressing plate 4 are sequentially arranged, and finally a nut 5 is fastened. Fig. 2 only shows a pin schematically, and it can be seen that the slots formed by stacking the plurality of punching parts 8 are inclined (rotation angle) at a certain angle with the axis of the stator core, the rotation angle a of the assembly is controlled by the inclination of the holes on the backing plate, and the hole diameter and the angle size on the assembly determine the position of the positioning pin, and the angle ensures that the laminated slot angle required by the design data is a slot pitch, so the determination of the angle and the size is particularly important, and the size is calculated according to an empirical calculation formula of the angle of one tooth, and has an error compared with the actual size.

In addition, the conventional jig structure is suitable for the straight-tooth iron core. At present, the stator core generally adopts a twisted chute structure, the tooth form is twisted and inclined, and the iron core is not suitable for being stacked. Through analyzing the clamp structure, the main reasons are that the size of the punching sheet groove is small, the strength of the pins is poor, the punching sheet is unstable, and due to the fact that a plurality of pins need to be matched at the same time, stacking is difficult, and discharging is difficult. The groove shape consistency is poor, and the processing efficiency is low. Therefore, in actual production, a groove repairing process is added to ensure the dimensional requirement of the groove type.

Disclosure of Invention

In order to solve at least one of the above-mentioned technical problem, the application provides a stator core closed assembly anchor clamps for improve the iron core quality, promote machining efficiency, shorten this type of stator core's processing cycle, practice thrift manpower resources and manufacturing cost.

This application stator core closed assembly anchor clamps includes:

the mandrel is provided with a key groove on the outer circle of the mandrel along the direction forming a set angle with the axial direction of the mandrel;

the positioning key is detachably arranged in a key groove of the mandrel and comprises strip-shaped bulges protruding out of the outer circle surface of the mandrel, and a plurality of punching parts are sleeved on the mandrel so that notches of the punching parts are matched with and receive the strip-shaped bulges;

the base plate is arranged on the mandrel and is positioned at one end of the punching sheet parts;

the pressing plate is arranged on the mandrel and is positioned at the other ends of the punching sheet parts;

and the nut is in threaded connection with the mandrel, is positioned on one side of the pressing plate, which deviates from the punching sheet part, and is used for pressing the pressing plate.

Preferably, the mandrel sequentially comprises a limiting plate, an overlapping section and a pressing section along the axial direction, the outer diameter of the limiting plate is larger than that of the overlapping section and used for limiting the axial movement of the backing plate, the outer diameter of the overlapping section is larger than that of the pressing section and used for installing a positioning key and a punching part, and at least part of the pressing section is provided with external threads.

Preferably, a cover plate is arranged between the pressing plate and the punching sheet part, the inner diameter of the cover plate is larger than the outer diameter of the stacking section and smaller than the outer diameter of the pressing plate, and the cover plate can be pressed tightly when the pressing plate moves axially along the pressing section of the mandrel.

Preferably, the set angle is determined according to the size of the stacked chute of the stamped parts.

Preferably, the positioning key is fixed on the spindle through dovetail fit, the key groove of the spindle is a dovetail groove, the cross section of the positioning key is provided with two sections with different widths, the positioning key is inserted into the key groove of the spindle through dovetail fit, and the part with the smaller width is positioned outside the key groove.

The stator core stacking device solves the problems that stator cores of the skewed slots are difficult to stack and the consistency of the slot shapes is poor, greatly improves the processing quality of the assembly, and improves the processing efficiency. The processing period of the parts is shortened.

Drawings

Fig. 1 is a schematic view of a stator core structure of the present application.

Fig. 2 is a schematic view of a conventional stator core stacking tool.

Fig. 3 is a schematic view of a stator core stacking tool according to an embodiment of the present application.

FIG. 4 is a front view of the mandrel of the embodiment of FIG. 3 of the present application.

FIG. 5 is a schematic illustration of the mandrel grooving of the embodiment of the present application shown in FIG. 4.

FIG. 6 is a front view of the mandrel slotting and setting key embodiment of FIG. 4 of the present application.

FIG. 7 is a schematic view of the positioning key of section A-A of the mandrel slot of the embodiment of the present application shown in FIG. 6.

The punching die comprises a mandrel 1, a positioning key 2, a backing plate 3, a pressing plate 4, a nut 5, a cover plate 6, a pin 7, a punching sheet part 8, a limiting plate 11, a stacking section 12 and a pressing section 13.

Detailed Description

In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all embodiments of the present application. The embodiments described below with reference to the drawings are illustrative and intended to be used for explaining the present application and should not be construed as limiting the present application. All other embodiments that can be derived by a person skilled in the art from the embodiments given herein without making any creative effort fall within the protection scope of the present application. Embodiments of the present application will be described in detail below with reference to the drawings.

In the description of the present invention, it is to be understood that the terms "central", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations and positional relationships based on those illustrated in the drawings, and are used merely to facilitate the description of the invention and to simplify the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be taken as limiting the scope of the invention.

The invention provides a stator core stacking clamp, as shown in fig. 3, which mainly comprises:

the device comprises a mandrel 1, a driving device and a control device, wherein a key groove is formed in the outer circle of the mandrel along the direction forming a set angle with the axial direction of the mandrel;

the positioning key 2 is detachably arranged in a key groove of the mandrel 1, the positioning key 2 comprises strip-shaped protrusions protruding out of the outer circle surface of the mandrel 1, and a plurality of punching parts are sleeved on the mandrel 1, so that notches of the punching parts are matched with the strip-shaped protrusions;

the backing plate 3 is arranged on the mandrel 1 and is positioned at one end of the punching sheet parts;

the pressing plate 4 is arranged on the mandrel 1 and is positioned at the other ends of the punching sheet parts;

and the nut 5 is screwed on the mandrel 1, is positioned on one side of the pressing plate 4, which is far away from the punching sheet part, and is used for pressing the pressing plate 4.

In this application, the navigation key is the core part of anchor clamps, and its size must be with part notch size fit clearance 0.015mm-0.025mm, and its inclination 21 is the required rotation angle of subassembly.

In some optional embodiments, as shown in fig. 4, the mandrel 1 includes, in order along the axial direction, a limiting plate 11, an assembling section 12 and a pressing section 13, an outer diameter of the limiting plate is greater than an outer diameter of the assembling section 12 for limiting the axial movement of the backing plate 3, an outer diameter of the assembling section 12 is greater than an outer diameter of the pressing section 13 for installing the positioning key 2 and the punching component, and the pressing section 13 has at least a part with an external thread.

In some optional embodiments, referring to fig. 3, a cover plate 6 is arranged between the pressing plate 4 and the punching part, the inner diameter of the cover plate 6 is larger than the outer diameter of the stacking section 12 and smaller than the outer diameter of the pressing plate 4, when the pressing plate 4 moves axially along the pressing section 13 of the mandrel, the cover plate 6 can be pressed, the pressing plate 4 is transited through the cover plate 6, the pressing force of the pressing plate 4 acts on the punching stacking lamination 8, and the direct pressing connection on the stacking section 12 of the mandrel is prevented.

In some alternative embodiments, the set angle is determined according to the size of the laminated oblique groove of the stamped part, for example, 21 °.

In some alternative embodiments, the positioning key 2 is fixed on the mandrel 1 through a dovetail fit, the key groove of the mandrel 1 is a dovetail groove, the cross section of the positioning key 2 is two sections with different widths, and referring to fig. 6 and 7, the positioning key is inserted into the key groove of the mandrel 1 through the dovetail fit, and the part with the smaller width is positioned outside the key groove, it should be understood that the part positioned outside the key groove is only used for orientation, and as can be seen from the structural diagram of the stator core shown in fig. 1, the part positioned outside the key groove is only filled in the opening of the slot of the stator core.

The dovetail matching structure is adopted with the mandrel to the positioning key, so that the assembly is reliable, and the disassembly is convenient. The groove of locating key is processed on backing plate and the apron, the installation of being convenient for, the installation is:

firstly, the positioning key is installed on the mandrel, then the backing plate is installed on the mandrel, then a plurality of punching sheet parts are installed on the mandrel, then the cover plate and the pressing plate are sequentially installed, and finally the nut is fastened.

The use effect of the stacking fixture is that the problems of difficult stacking of stator iron cores of the skewed slots and poor uniformity of slot shapes are solved, the original process of repairing and ensuring slot shapes is cancelled, and an effective method is provided for stacking of stator iron core components of the skewed slots. The dimensions of the part notch are positioned by a key slot. Simple stacking and good stator slot-type consistency. The original stator needs to be manually filed for about 3 hours, the annual manual groove filing time is 195 multiplied by 3 to 585 hours, only one part can save the annual capital for about 585 multiplied by 40 to 2.34 ten thousand yuan, and 40 is the labor cost per hour. The invention solves the quality problem of uneven slot shapes after the iron cores of the skewed slots are stacked, greatly improves the processing quality of the assembly and improves the processing efficiency. The processing period of the parts is shortened.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.