WO2021196676A1

WO2021196676A1 - Transformer silicon steel sheet stacking and welding method

Info

Publication number: WO2021196676A1
Application number: PCT/CN2020/132702
Authority: WO
Inventors: 秦江勋; 吴小飞; 唐庆凤
Original assignee: 南京安盛电子有限公司
Priority date: 2020-03-30
Filing date: 2020-11-30
Publication date: 2021-10-07
Also published as: CN111261399A

Abstract

A transformer silicon steel sheet stacking and welding method, comprising the following steps: step 1, material preparation; 2, E sheet stacking; 3, E sheet assembly: loading stacked E-shaped silicon steel sheets into a middle hole of a transformer framework, wherein the loading direction cannot be offset or skewed so as to prevent the silicon steel sheets from wire breakage due to damage to enameled wires for winding a coil in the framework; step 4, I sheet stacking and assembly: stacking I-shaped silicon steel sheets according to the stacking thickness of the E-shaped silicon steel sheets, and then placing the stacked I-shaped silicon steel sheets on the E-shaped silicon steel sheets; step 5, silicon steel sheet welding; and step 6, weld inspection. The transformer silicon steel sheet stacking and welding method has the following beneficial effects: the preparation process therefor is reasonable in design, the stacking and welding production efficiency of silicon steel sheet products is high, and the protection process is reasonably designed, so that the product rejection rate is low, the raw material production cost input is reduced, and the manufactured products are excellent and stable in quality.

Description

Stacking welding method of transformer silicon steel sheet

Technical field

The invention belongs to the technical field of application of transformer silicon steel sheets, and specifically relates to a method for stacking and welding transformer silicon steel sheets.

Background technique

Transformer (Transformer) is a device that uses the principle of electromagnetic induction to change the AC voltage. The main components are the primary coil, the secondary coil and the iron core (magnetic core). The main functions are: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization (magnetic saturation transformer), etc. According to the purpose, it can be divided into: power transformer and special transformer (electric furnace transformer, rectifier transformer, power frequency test transformer, voltage regulator , Mining transformers, audio transformers, intermediate frequency transformers, high frequency transformers, impact transformers, instrument transformers, electronic transformers, reactors, transformers, etc.).

Silicon steel sheet, it is a kind of ferrosilicon soft magnetic alloy with very low carbon content. Generally, the silicon content is 0.5~4.5%. The addition of silicon can increase the resistivity and maximum permeability of iron, and reduce the coercive force and iron core. Loss (iron loss) and magnetic aging. The silicon steel sheet is an important component of the transformer. It needs to be assembled and stacked during production. However, the existing production methods have low production efficiency, poor quality and unstable quality after testing.

Therefore, based on the above-mentioned problems, the present invention provides a method for stacking and welding transformer silicon steel sheets.

Summary of the invention

Objective of the invention: The objective of the present invention is to provide a method for stacking and welding transformer silicon steel sheets. The preparation process is reasonable in design, and the production efficiency of silicon steel sheet stacking and welding is high. At the same time, the rationally designed production process has a low product scrap rate and also saves raw material production. Cost investment, the products produced are of high quality and stable quality.

Technical Solution: The present invention provides a method for stacking and welding transformer silicon steel sheets, which includes the following steps, step 1, material preparation, preparation before production, and preparation of all raw materials required for product production. Step 2. Stack the E sheets, and stack the E-type silicon steel sheets according to the stack thickness of the holes in the transformer skeleton. Step 3. Assemble the E piece. Put the stacked E-shaped silicon steel piece into the middle hole of the transformer frame. Pay attention to the installation direction not to be skewed, so as to avoid the silicon steel piece from damaging the enameled wire of the wire bud inside the skeleton. Disconnected. Step 4. Stacking and assembling the I-type silicon steel sheet, stack the I-type silicon steel sheet according to the stacking thickness of the E-type silicon steel sheet, and then place it on the E-type silicon steel sheet. Step 5. Weld the silicon steel sheet. Step 6. Weld inspection.

In this technical solution, in the step 5, the transformer with stacked silicon steel sheets is placed in the welding jig, and the silicon steel sheets are welded using an argon arc welding machine. The welding current is 60-70 amperes and the welding speed is 3 mm per unit. Second, the argon flow rate is 5-7 liters per minute, and the distance between the tungsten needle of the welding gun and the silicon steel sheet is controlled between 1.5-2 mm for welding.

In this technical solution, the width of the welding seam in the step 6 is required to be 2.5-3 mm, and the welding seam is at the joining line of the E piece and the I piece, straight without offset, and smooth and bright.

In this technical solution, in the step 5, the transformer with stacked silicon steel sheets is placed in the welding jig, and the silicon steel sheets are welded using an argon arc welding machine. The welding current is 65 amperes and the welding speed is 3 millimeters per second. The argon flow rate is 6.5 liters per minute, and the distance between the tungsten needle of the welding gun and the silicon steel sheet is controlled between 1.8-2 mm for welding.

In this technical solution, the width of the weld in the step 6 is required to be 2.7-2.8 mm, and the weld is on the joining line of the E piece and the I piece, straight without offset, and smooth and bright.

Compared with the prior art, the beneficial effects of the transformer silicon steel sheet stack welding method of the present invention are: its preparation process design is reasonable, the silicon steel sheet product stack welding production efficiency is high, and the rationally designed production process has a low product scrap rate. It also saves the cost of raw material production, and the produced products are of high quality and stable quality.

Detailed ways

The present invention will be further clarified below in conjunction with specific examples.

Example one

The method for stacking and welding transformer silicon steel sheets of the present invention includes the following steps: Step 1, material preparation, preparation work before production, and preparation of all raw materials required for product production. Step 2. Stack the E sheets, and stack the E-type silicon steel sheets according to the stack thickness of the holes in the transformer skeleton. Step 3. Assemble the E piece. Put the stacked E-shaped silicon steel piece into the middle hole of the transformer frame. Pay attention to the installation direction not to be skewed, so as to avoid the silicon steel piece from damaging the enameled wire of the wire bud inside the skeleton. Disconnected. Step 4. Stacking and assembling the I-type silicon steel sheet, stack the I-type silicon steel sheet according to the stacking thickness of the E-type silicon steel sheet, and then place it on the E-type silicon steel sheet. Step 5. Weld the silicon steel sheet. Step 6. Weld inspection.

Further preferably, in this technical solution, in the step 5, the transformer with the stacked silicon steel sheets is placed in the welding jig, and the silicon steel sheets are welded using an argon arc welding machine, and the welding current is 60-70 amperes. The speed is 3 mm per second, the argon flow rate is 5-7 liters per minute, and the distance between the tungsten needle of the welding gun and the silicon steel sheet is controlled between 1.5-2 mm for welding; and the width of the weld in step 6 is required to be 2.5-3 Mm, the welding seam is at the joint line of the E piece and the I piece, straight without offset, smooth and bright.

Example two

Further preferably, in the step 5, the transformer with stacked silicon steel sheets is placed in the welding jig, and the silicon steel sheets are welded using an argon arc welding machine. The welding current is 65 amperes, the welding speed is 3 millimeters per second, and the argon The gas flow rate is 6.5 liters per minute, and the distance between the tungsten needle of the welding gun and the silicon steel sheet is controlled to be between 1.8-2 mm for welding; and the width of the welding seam in the step 6 is required to be 2.7-2.8 mm, and the welding seam is between the E slice and the I The joint line of the film is straight without offset, smooth and bright.

Compared with the conventional silicon steel sheet inserting process, the transformer silicon steel sheet stack welding method of Embodiment 1 or Embodiment 2 of the present invention has higher efficiency, better quality and more stable, and it will not happen due to the lack of tightness of the inserts. The change of transformer parameters fundamentally solves the loosening of the silicon steel sheet caused by the movement in the subsequent process after the transformer is inserted into the silicon steel sheet, resulting in no-load power consumption, higher no-load current, and transformer whistling during the finished transformer test. problem. Greatly reduce the loss caused by the scrap of the finished product, increase the yield of the finished product, and bring good economic benefits.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements can be made, and these improvements should also be regarded as the present invention. The scope of protection.

Claims

The method for stacking and welding transformer silicon steel sheets is characterized in that it comprises the following steps:

Step 1. Material preparation, preparation work before production, apply for all the raw materials required for production preparation;

Step 2. Stack the E sheets, and stack the E-type silicon steel sheets according to the stack thickness of the holes in the transformer skeleton;

Step 3. Assemble the E piece. Put the stacked E-shaped silicon steel piece into the middle hole of the transformer frame. Pay attention to the installation direction not to be skewed, so as to avoid the silicon steel piece from damaging the enameled wire of the wire bud inside the skeleton. Disconnected

Step 4. Stacking and assembling the I-type silicon steel sheet, stack the I-type silicon steel sheet according to the stacking thickness of the E-type silicon steel sheet, and then place it on the E-type silicon steel sheet;

Step 5. Welding of silicon steel sheet;

Step 6. Weld inspection.
The method for stacking and welding silicon steel sheets of a transformer according to claim 1, characterized in that: in step 5, the transformer with stacked silicon steel sheets is placed in a welding jig, and an argon arc welding machine is used to perform the welding process on the silicon steel sheets. For welding, the welding current is 60-70 amperes, the welding speed is 3 mm per second, the argon flow is 5-7 liters per minute, and the distance between the tungsten needle of the welding gun and the silicon steel sheet is controlled between 1.5-2 mm for welding.
The method for stacking welding of silicon steel sheets in a transformer according to claim 1, wherein the width of the welding seam in the step 6 is required to be 2.5-3 mm, and the welding seam is on the joint line of the E piece and the I piece, and there is no offset in a straight line. Smooth and bright.
The method for stacking and welding silicon steel sheets of a transformer according to claim 2, characterized in that: in step 5, the transformer with stacked silicon steel sheets is placed in a welding jig, and an argon arc welding machine is used to perform the welding process on the silicon steel sheets. Welding, the welding current is 65 amps, the welding speed is 3 mm per second, the argon flow rate is 6.5 liters per minute, and the distance between the tungsten needle of the welding gun and the silicon steel sheet is controlled between 1.8-2 mm for welding.
The method for stacking and welding transformer silicon steel sheets according to claim 3, characterized in that the width of the welding seam in the step 6 is required to be 2.7-2.8 mm, and the welding seam is on the joint line of the E piece and the I piece, and there is no offset in a straight line. Smooth and bright.