Assembling process of stator ventilation slot plate of hydraulic generator
阅读说明：本技术 一种水轮发电机定子通风槽板的组装工艺 (Assembling process of stator ventilation slot plate of hydraulic generator ) 是由 杨钢 于 2020-08-03 设计创作，主要内容包括：本发明提供了一种水轮发电机定子通风槽板的组装工艺,步骤包括：步骤1,将呈扇形的定子冲片两个下角卡装在装夹工具的两个定位件的阶台处,使定子冲片与装夹工具固定在一起；步骤2,翻转装夹工具,使定子冲片搁放在垫块顶面；步骤3,将通风槽钢卡放在装夹工具的定位槽中,并使通风槽钢底面贴靠定子冲片表面；步骤4,将定子冲片与通风槽钢焊接在一起,完成组装；步骤5,将焊接好的定子通风槽板与装夹工具分离,继续开展下一产品组装；本发明不仅能够大幅提高产品合格率,而且能够大幅提高组装效率。(The invention provides an assembly process of a stator ventilation slot plate of a hydraulic generator, which comprises the following steps: step 1, clamping two lower corners of a fan-shaped stator punching sheet at the steps of two positioning pieces of a clamping tool, so that the stator punching sheet and the clamping tool are fixed together; step 2, turning over the clamping tool to enable the stator punching sheet to be placed on the top surface of the cushion block; step 3, clamping the ventilation channel steel in a positioning groove of a clamping tool, and enabling the bottom surface of the ventilation channel steel to be attached to the surface of the stator punching sheet; step 4, welding the stator punching sheet and the ventilation channel steel together to complete assembly; step 5, separating the welded stator ventilation slot plate from the clamping tool, and continuing to assemble the next product; the invention not only can greatly improve the product percent of pass, but also can greatly improve the assembly efficiency.)
1. The assembly process of the stator ventilation slot plate of the hydraulic generator is characterized by comprising the following steps of:
step 1, clamping two lower corners (10) of a fan-shaped stator punching sheet (2) at the step positions of two positioning pieces (5) of a clamping tool to fix the stator punching sheet (2) and the clamping tool together;
step 2, turning over the clamping tool to enable the stator punching sheet (2) to be placed on the top surface of the cushion block (8);
step 3, clamping the ventilation channel steel (7) in a positioning groove (3) of a clamping tool, and enabling the bottom surface of the ventilation channel steel (7) to be attached to the surface of the stator punching sheet (2);
step 4, welding the stator punching sheet (2) and the ventilation channel steel (7) together;
step 5, separating the welded stator ventilation slot plate from the clamping tool, and continuing to assemble the next product;
the clamping tool comprises a positioning plate (1), two positioning pieces (5) are fixedly arranged on the same side face of the positioning plate (1), a step (11) is arranged on the inner side of each positioning piece (5), the steps (11) of the two positioning pieces (5) are arranged oppositely and symmetrically with respect to the central line (12) of the positioning plate, and the surfaces of the steps (11) of the two positioning pieces (5) are used for simultaneously abutting against the edges of two lower corners (10) of the stator punching sheet (2);
the positioning plate (1) is also provided with a positioning groove (3), the width of the positioning groove (3) is 0.15-0.2 mm larger than that of the ventilation channel steel (7), and the length of the positioning groove (3) is 0.3-0.5 mm larger than that of the ventilation channel steel (7);
the center lines of the two positioning pieces (5), the center line of the positioning groove (3) and the center line (12) of the positioning plate are intersected at the circle center of the stator punching sheet (2);
the clamping tool further comprises a cushion block (8) arranged on the operating platform, and when the stator punching sheet (2) is placed on the top surface of the cushion block (8), the bottom surfaces of the two positioning pieces (5) and the bottom surface of the cushion block (8) are coincided on the operating platform surface (9) at the same time.
2. The assembly process according to claim 1, wherein: in the step 1, the clamping tool is erected and fixed by means of arm force, and then the stator punching sheet (2) is vertically inserted between the two positioning pieces (5), so that the two lower corners (10) of the stator punching sheet (2) are clamped at the steps of the two positioning pieces (5).
3. The assembly process according to claim 1, wherein: in the step 1, the positioning pieces (5) are upwards, the clamping tool is horizontally placed, then the stator punching sheet (2) is transversely inserted between the two positioning pieces (5), and two lower corners (10) of the stator punching sheet (2) are clamped at the steps of the two positioning pieces (5).
4. The assembly process according to claim 1, 2 or 3, wherein: the positioning piece (5) is connected to the positioning piece (5) through the fastening piece (6), and after the fastening piece (6) is loosened, the positioning piece (5) can rotate under the action of external force.
5. The assembly process according to claim 4, wherein: when the fastening element (6) is released, the two positioning elements (5) can be moved towards each other or towards each other by means of an external force.
6. The assembly process according to claim 5, wherein: the positioning plate (1) is rectangular or arc-shaped.
Technical Field
The invention relates to a production process of a hydraulic generator part, in particular to an assembly process of a hydraulic generator stator ventilation slot plate.
Background
The stator ventilation slot plate of the hydraulic generator consists of a stator punching sheet and a ventilation channel steel, wherein the ventilation channel steel and the stator punching sheet form a whole in a spot welding mode, and the ventilation channel steel is used for forming a radial air duct and ventilating and cooling a stator core and a stator coil. The ventilating slot steel material is generally non-magnetic I-shaped steel, and the mounting position of the ventilating slot steel material is in the center of the teeth of the stator punching sheet or on two sides of the uniformly distributed teeth and is parallel to the side edge of the tooth groove of the stator punching sheet.
In the production process of the stator ventilation slot plate of the hydraulic generator, the requirement on the welding position of the ventilation channel steel, particularly the position of the ventilation channel steel relative to the stator punching sheet is high (the relative position of the ventilation channel steel and the stator punching sheet seriously affects the qualification rate of products), and the existing methods for assembling the ventilation slot plate (such as a direct marking method and a positioning jig alignment method disclosed by CN 204366302U) have the problems of high labor and time consumption and low qualification rate. Based on this, the inventor has earlier developed a clamping instrument of hydraulic generator stator air duct board (refer to document CN207593135U), including the sector plate, be provided with the bolt subassembly that is used for spacing at the sector plate lateral wall, be provided with a plurality of strip holes of mutual interval along the sector plate radial, the one end in strip hole extends to the arc end of sector plate, and the section of strip hole in the width direction in strip hole is the T type structure. Although the tool can clamp the ventilation channel steel through the strip-shaped holes and achieve the effect of accurate positioning, for the stator ventilation slotted plate of the medium-sized hydroelectric generating set, only about 83-85% of product yield (stator ventilation slotted plate assembly yield) can be achieved by the tool, and the assembly efficiency of each skilled operator can only reach 10-12 per hour.
Disclosure of Invention
The invention aims to provide an assembly process of a stator ventilation slot plate of a hydraulic generator, which is used for improving the product percent of pass and the assembly efficiency.
In order to achieve the above object, the present invention adopts the following technical solutions.
An assembly process of a hydro-generator stator ventilation slot plate comprises the following steps:
the clamping tool comprises a positioning plate, two positioning pieces are fixedly arranged on the same side of the positioning plate, a step is arranged on the inner side of each positioning piece, the steps of the two positioning pieces are oppositely arranged and symmetrically arranged along the central line of the positioning plate, and the surfaces of the steps of the two positioning pieces are used for simultaneously abutting against the edges of two lower corners of the stator punching sheet;
the positioning plate is also provided with a positioning groove, the width of the positioning groove is 0.15-0.2 mm larger than that of the ventilation channel steel, and the length of the positioning groove is 0.3-0.5 mm larger than that of the ventilation channel steel;
the center lines of the two positioning pieces, the center line of the positioning groove and the center line of the positioning plate are intersected at the circle center of the stator punching sheet;
the clamping tool further comprises a cushion block arranged on the operating table, and when the stator punching sheet is placed on the top surface of the cushion block, the bottom surfaces of the two positioning pieces and the bottom surface of the cushion block are coincided on the operating table surface at the same time.
As a preferred scheme, in
As a preferred scheme, in
Preferably, the step is a right-angle step, that is, the corner of the step is a right angle.
Further, the side of the step completely leans on with the side edge of the stator punching sheet.
Furthermore, the setting element passes through the fastener and connects on the setting element, and when the fastener pine take off the back, the setting element can rotate with the help of the effect of external force, adopts such structure still to be convenient for assemble the ventilation frid of different specifications (mainly towards the stator punching sheet of different radians).
Furthermore, when the fastener is loosened, the two positioning parts can move oppositely or oppositely under the action of external force, and the structure is adopted, so that the ventilation slotted plates with different specifications (mainly aiming at stator punching sheets with different lengths) can be assembled conveniently.
Preferably, the positioning plate is rectangular or arc-shaped.
By adopting the method, the product percent of pass can be greatly improved, the assembly efficiency can be greatly improved, the assembly percent of pass of the stator ventilation slot plate of the medium-sized hydroelectric generating set can be more than 99 percent aiming at the stator ventilation slot plate, and the assembly efficiency of each skilled operator can reach 25-26 per hour; by adopting the method, the steps are very compliant with the natural operation habit of a human body, the step of clamping the stator punching sheet in the whole operation process is particularly ingenious, and the problem that the relative position of the stator punching sheet and the ventilation channel steel is easy to change is solved in a simple mode.
Drawings
FIG. 1 is a schematic view of a clamping tool used in
FIG. 2 is a side view schematically showing a chuck used in
FIG. 3 is a schematic view of a positioning plate of the chucking tool in
fig. 4 is a schematic view of the chuck used in
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the following embodiments are only used for understanding the principle of the present invention and the core idea thereof, and do not limit the scope of the present invention. It should be noted that modifications to the invention as described herein, which do not depart from the principles of the invention, are intended to be within the scope of the claims which follow.
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