CN107834786B - Manufacturing method of tension screw type laminated iron core - Google Patents

Manufacturing method of tension screw type laminated iron core Download PDF

Info

Publication number
CN107834786B
CN107834786B CN201711162596.5A CN201711162596A CN107834786B CN 107834786 B CN107834786 B CN 107834786B CN 201711162596 A CN201711162596 A CN 201711162596A CN 107834786 B CN107834786 B CN 107834786B
Authority
CN
China
Prior art keywords
iron core
tightening
screw type
core
tension screw
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201711162596.5A
Other languages
Chinese (zh)
Other versions
CN107834786A (en
Inventor
王菁
雷雄
郑毅锋
贺开华
赵一香
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hunan Hunan Electric Power Co Ltd
Original Assignee
Hunan Hunan Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hunan Hunan Electric Power Co Ltd filed Critical Hunan Hunan Electric Power Co Ltd
Priority to CN201711162596.5A priority Critical patent/CN107834786B/en
Publication of CN107834786A publication Critical patent/CN107834786A/en
Application granted granted Critical
Publication of CN107834786B publication Critical patent/CN107834786B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K15/00Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies

Abstract

The invention relates to a method for manufacturing a tension screw type laminated iron core, which comprises the following steps: step 1, stacking iron core stamped sheets, installing a tensioning screw rod, axially and sectionally applying pressure to the iron core stamped sheets of the iron core, and preliminarily screwing a fastening element of the tensioning screw rod of the iron core in a compression state after the iron core stamped sheets are stacked and applied with pressure; step 2, compacting, namely compacting the preliminarily screwed iron core; step 3, when the iron core is at normal temperature, tightening the tightening screw of the iron core which is subjected to compaction treatment again; and 4, spot welding for fixing, namely spot welding the tensioning screw and the fastening element thereof to fix the iron core into a whole. The newly increased compaction treatment and the re-tightening treatment after the compaction treatment are carried out in the iron core laminating process, and then spot welding is carried out to form a whole, so that the laminated iron core is prevented from loosening, the laminated iron core is not easy to distort and deform, the electric performance of the motor is finally ensured, and the work efficiency is improved.

Description

Manufacturing method of tension screw type laminated iron core
Technical Field
The invention relates to a manufacturing method of a laminated iron core, in particular to a manufacturing method of a tension screw type laminated iron core.
Background
The types of laminated iron cores include: stator cores, rotor cores, pole cores, and the like. Structurally, the laminated iron core at least comprises a lamination of a group of iron core punching sheets, a group of axial fastening elements, and corresponding fasteners, locking devices and/or spot welding fixing structures.
The iron core is one of laminated iron cores. The iron core at least comprises a group of iron core laminations which are stacked and a group of axial fastening elements, wherein the axial fastening elements are tensioning screws, and fastening elements, locking devices and/or spot welding fixing structures corresponding to the tensioning screws.
Corresponding to the type of the laminated iron core, the type of the iron core correspondingly comprises the following steps: a tension screw type stator core, a tension screw type rotor core, a tension screw type magnetic pole core, etc.
The above conventional methods for manufacturing the tension screw type stator core, the tension screw type rotor core, the tension screw type pole core, and the like are substantially similar.
The stator core is divided into in its assembly: external press-fitting stator core and internal press-fitting stator core. Corresponding to the tightening screw type stator core, the corresponding division is: the stator core comprises a tension screw type external press-fitting stator core and a tension screw type internal press-fitting stator core.
The following description will be given by taking a conventional manufacturing method of a tension screw type external press-fit stator core as an example, and the general steps are as follows:
step 1, stacking iron core stamped sheets, installing a tensioning screw rod, axially and sectionally applying pressure to the iron core stamped sheets of the iron core, and screwing a fastening element of the tensioning screw rod of the iron core in a compression state after the iron core stamped sheets are stacked and applied with pressure;
and 2, spot welding for fixing, namely spot welding the tensioning screw and the fastening element thereof to fix the iron core into a whole.
And finally, completing the laminating molding of the tension screw type external press-fitting stator core.
Taking the manufacturing method of the conventional tension screw type external press-fitting stator core as an example, the manufacturing process comprises the following steps: tightening a fastening element of a tightening screw of a conventional tightening screw type external press-fit stator core in a compressed state: a nut; the tensioning screw is then fixed with its fastening element by spot welding: the nut is used for fixing the conventional tightening screw type external press-mounting type stator iron core into a whole and performing all operations of all steps at normal temperature.
The conventional manufacturing method of the tension screw type external press-fitting stator core has the following problems:
in the running process of the motor, the compaction degree of the conventional tightening screw type external press-mounting type stator core is easy to reduce, and even a loosening phenomenon is generated, so that the vibration of the conventional tightening screw type external press-mounting type stator core is increased, and the noise of the motor is correspondingly increased. The motor runs for a long time, the fatigue damage of a fastener of the conventional tension screw type external press-mounting type stator core is caused, the conventional tension screw type external press-mounting type stator core generates local heat, the insulation of a coil embedded in the conventional tension screw type external press-mounting type stator core is damaged, and therefore the electrical performance of the motor is damaged.
On the other hand, in the manufacturing process of laminating and molding the conventional tension screw type external press-fitting stator core according to the manufacturing method of the conventional tension screw type external press-fitting stator core, the stress generated by the punching sheets of the tension screw type external press-fitting stator core in the process of laminating and assembling is not eliminated; meanwhile, blanking stress generated by the punching sheet of the tension screw type external press-mounting type stator core in the punching process of the previous procedure is not eliminated. Therefore, after the conventional tension screw type external press-fitting stator core is laminated and molded according to the manufacturing method of the conventional tension screw type external press-fitting stator core, the conventional tension screw type external press-fitting stator core is easy to twist and deform and the like. Therefore, the wire embedding of the screw-type external press-mounting stator core in the next working procedure is difficult, even the insulation of the embedded coil is damaged, and finally the electrical performance of the motor is damaged. In addition, when the screw rod type external press-mounting type stator iron core is tightened in the next process, the stator iron core is difficult to sleeve and even scrapped, and the production cost is increased.
Disclosure of Invention
The invention aims to overcome the defects, and provides the manufacturing method of the tension screw type laminated iron core, which has the advantages that the compression degree of the laminated iron core is not reduced in the laminating forming and running processes, the laminated iron core is prevented from loosening, the laminated iron core is not easy to distort and deform, the electric performance of a motor is finally ensured, the work efficiency is improved, and the production cost is reduced.
The technical scheme of the invention is as follows: a manufacturing method of a tension screw type laminated iron core comprises the following steps:
step 1, stacking iron core stamped sheets, installing a tensioning screw rod, axially and sectionally applying pressure to the iron core stamped sheets of the iron core, and preliminarily screwing a fastening element of the tensioning screw rod of the iron core in a compression state after the iron core stamped sheets are stacked and applied with pressure;
step 2, compacting, namely compacting the preliminarily screwed iron core;
step 3, when the iron core is at normal temperature, tightening the tightening screw of the iron core which is subjected to compaction treatment again;
and 4, spot welding for fixing, namely spot welding the tensioning screw and the fastening element thereof to fix the iron core into a whole.
Preferably, the pressure for axially and sectionally pressing the iron core in the step 1 is the same.
Preferably, the pressure for axially and sectionally pressing the iron core in the step 1 is increased section by section.
Preferably, the pressure increase in the increase stage by stage is 1.1 to 1.25 times that of the pressure value in the last stage.
Preferably, when the compacting treatment in step 2 is performed, the iron core is placed vertically.
Preferably, the compacting treatment in step 2 is a vibratory aging compacting treatment.
Preferably, the compacting treatment in the step 2 is heating compacting treatment;
preferably, the heating temperature for heating the compacted iron core is preferably: 70 ℃ to 85 ℃; the heating and heat preservation time is not more than 24 h.
The invention has the beneficial technical effects that the iron core is newly added with compacting treatment in the iron core laminating process, and is screwed again after the compacting treatment and then is spot-welded into a whole, so that the reduction of the compacting degree of the iron core in the operation process of the motor is avoided, the laminated iron core does not generate the loosening phenomenon, the vibration of the iron core is reduced, and the noise of the motor is correspondingly reduced. Meanwhile, the iron core of the motor is prevented from generating heat locally in the operation process, and the insulation of a coil embedded in the iron core is prevented from being damaged, so that the electric performance of the motor is ensured. The iron loss of the iron core is reduced, and the electric performance of the motor is improved. On the other hand, after improvement, in the manufacturing process of laminating and molding the iron core according to the improved manufacturing method of the iron core, the stress generated in the process of laminating and assembling the iron core sheets of the iron core is eliminated; meanwhile, the blanking stress generated by the iron core punching sheet of the iron core in the punching process of the last procedure is also eliminated. Therefore, after the iron core is laminated and molded according to the improved manufacturing method of the iron core, the improved iron core is not easy to generate the problems of distortion, deformation and the like. Therefore, the problems that the wire embedding of the iron core in the next process is difficult and the insulation of the embedded coil is damaged are solved, and the electric performance of the motor is finally ensured. In addition, when the improved tension screw type external press-mounting type stator core is sleeved on the stator base in the next procedure, the sleeving is smooth, the working efficiency is improved, scrapping is avoided, and the production cost is reduced.
Drawings
FIG. 1: the invention is a schematic structural diagram of the heating and compacting treatment of the tension screw type external press stator iron core vertically placed in an oven in the embodiment 1 and the embodiment 2.
FIG. 2: the invention is a structural schematic diagram of the embodiment 3 of the invention, wherein the tension screw type internal press-mounting stator core is vertically placed in an oven for heating and compacting treatment.
FIG. 3: the invention is a structural schematic diagram of embodiment 4 that the tension screw type rotor core with the rotor bracket is vertically placed in an oven for heating and compacting treatment.
FIG. 4: the embodiment 5 of the invention is a structural schematic diagram of a heating compaction treatment of a tension screw type main pole iron core vertically placed in an oven.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to the attached drawings, the manufacturing method of the tension screw type laminated iron core comprises the following steps:
step 1, stacking iron core stamped sheets, installing a tensioning screw rod, axially and sectionally applying pressure to the iron core stamped sheets of the iron core, and preliminarily screwing a fastening element of the tensioning screw rod of the iron core in a compression state after the iron core stamped sheets are stacked and applied with pressure;
step 2, compacting, namely compacting the preliminarily screwed iron core;
step 3, when the iron core is at normal temperature, tightening the tightening screw of the iron core which is subjected to compaction treatment again;
and 4, spot welding for fixing, namely spot welding the tensioning screw and the fastening element thereof to fix the iron core into a whole.
First embodiment, referring to fig. 1, a method for manufacturing an iron core of an externally press-fitted stator core 1 of the present invention of the tension screw type, includes the steps of:
step 1, stacking iron core punching sheets I2 of a tension screw type external press-mounting type stator iron core 1, installing a tension screw I3, axially and sectionally applying pressure to the stator iron core 1, and preliminarily screwing a fastening element, namely a nut I4, of the tension screw I3 of the tension screw type external press-mounting type stator iron core 1 in a compression state after the iron core punching sheets I2 are stacked and applied pressure;
step 2, compacting, namely compacting the primarily tightened tightening screw type external press-mounting type stator core 1;
step 3, when the iron core is at normal temperature, tightening the tightening screw I3 of the tightening screw type external press-mounting stator iron core 1 which is subjected to compaction treatment again; (it is explained that if the compacting treatment of the above step is carried out in a specific manner of heating compacting treatment, the step of re-tightening the tension screw i 3 of the tension screw type external pressure mounting stator core 1 should be carried out after the heated tension screw type external pressure mounting stator core 1 is cooled to room temperature.)
And 4, spot welding and fixing, namely spot welding the tightening screw I3 and a fastening element, namely a nut I4, so that the tightening screw type external press-mounting type stator core 1 is fixed into a whole.
And thus, the laminating molding of the tension screw type external press-fitting stator core 1 is completed.
In the first embodiment, the step 1 of tensioning the screw-type external press-fitting stator core 1 applies pressure in an axial direction in a segmented manner, and in the operation process of compressing the tensioning screw-type external press-fitting stator core 1, the tensioning screw-type external press-fitting stator core 1 is laminated in the axial direction in a segmented manner, and the pressure applied by each iron core segment of the tensioning screw-type external press-fitting stator core 1 may be: and (3) segmenting and synchronously pressing, namely: the pressure applied by each axial iron core segment of the tension screw type external press-fitting stator iron core 1 is kept consistent. Under the way of subsection simultaneous compression, the pressure value applied to each axial iron core subsection of the tension screw type external press-fitting type stator iron core 1 is a conventional pressure value, and the conventional design requirement is met. In the step 1, a tool used for preliminary tightening in a compression state is a torque wrench, the tightening force is a group of fastening elements corresponding to a group of tightening screws I3, and the tightening force between nuts I4 is equivalent to the design requirement value. When preliminarily screwing up under the compression state, the screwing up sequence is as follows: proceeding in a symmetrical manner, namely: if the tension screw type external press-mounting type stator core 1 is circular, preliminary tightening is performed in a circumferential symmetry manner; if the tension screw type external press-fitting stator core 1 is axially symmetrical, preliminary tightening is performed in an axially symmetrical manner.
In the first embodiment, when the step 2 is performed with compaction, the tension screw type external press-fit stator core 1 is placed vertically, that is: the lamination direction of the iron core lamination I2 of the tension screw type external press-mounting stator iron core 1 is parallel to the horizontal plane, the compaction treatment mode is heating compaction treatment, and when the heating compaction treatment is adopted, the heating temperature of the tension screw type external press-mounting stator iron core 1 is 75 ℃. (ii) a The heating and heat preservation time is not more than 24 hours, the heating mode of the tightening screw type external press-mounting type stator iron core 1 is a resistance heating method, and the resistance heating method is specifically that a group of electric heating elements are uniformly distributed on the inner wall and the outer wall of the tightening screw type external press-mounting type stator iron core 1, and are uniformly distributed on the upper axial direction and the lower axial direction of the electric heating elements, so that the tightening screw type external press-mounting type stator iron core 1 is heated and heated; and simultaneously, the heated tension screw type external press-mounting type stator core 1 is wrapped and covered by a heat-insulating material to preserve heat.
In the first embodiment, the tool for re-tightening in step 3 is a torque wrench, the tightening force is the tightening force of the laminated iron core re-tightened by the torque wrench, and the tightening force of each tensioning screw of the laminated iron core after the compaction process reaches the tightening force of each tensioning screw of the laminated iron core during the initial tightening process before the compaction process, and the tightening sequence is performed in a symmetrical manner, that is: if the tension screw type external press-mounting type stator core 1 is circular, preliminary tightening is performed in a circumferential symmetry manner; if the tension screw type external press-fitting stator core 1 is axially symmetrical, preliminary tightening is performed in an axially symmetrical manner.
Second embodiment, referring to fig. 1, a method for manufacturing an iron core of an external press-fit stator core 1 of the present invention using a tension screw type includes the steps of:
step 1, stacking iron core punching sheets I2 of a tension screw type external press-mounting type stator iron core 1, installing a tension screw I3, axially and sectionally applying pressure to the stator iron core 1, and preliminarily screwing a fastening element, namely a nut I4, of the tension screw I3 of the tension screw type external press-mounting type stator iron core 1 in a compression state after the iron core punching sheets I2 are stacked and applied pressure;
step 2, compacting, namely compacting the primarily tightened tightening screw type external press-mounting type stator core 1;
step 3, when the iron core is at normal temperature, tightening the tightening screw I3 of the tightening screw type external press-mounting stator iron core 1 which is subjected to compaction treatment again; (it is explained that if the compacting treatment of the above step is carried out in a specific manner of heating compacting treatment, the step of re-tightening the tension screw i 3 of the tension screw type external pressure mounting stator core 1 should be carried out after the heated tension screw type external pressure mounting stator core 1 is cooled to room temperature.)
And 4, spot welding and fixing, namely spot welding the tightening screw I3 and a fastening element, namely a nut I4, so that the tightening screw type external press-mounting type stator core 1 is fixed into a whole.
And thus, the laminating molding of the tension screw type external press-fitting stator core 1 is completed.
In the second embodiment, the step 1 of tightening the screw-type external press-fitting stator core 1 applies pressure in an axial direction in a segmented manner, and during the operation of pressing the tightening screw-type external press-fitting stator core 1, the tightening screw-type external press-fitting stator core 1 is laminated in the axial direction in a segmented manner, and the pressure applied by each axial core segment may preferably be: and (3) segmented supercharging, namely: the pressure exerted by each axial iron core segment in the early stage of the tensioning screw type external press-fitting stator iron core 1 is kept consistent, and the pressure exerted by the last axial iron core segment is increased; the pressure applied to the last axial iron core segment is as follows: the pressure applied by each axial core segment in the previous stage is 1.1 times. Under the mode of sectional pressurization, the pressure value applied to each axial iron core section in the early stage of the tension screw type external press-fitting type stator iron core 1 is a conventional pressure value, and the conventional design requirements are met. In the step 1, a tool used for preliminary tightening in a compression state is a torque wrench, the tightening force is a group of fastening elements corresponding to a group of tightening screws I3, and the tightening force between nuts I4 is equivalent to the design requirement value. When preliminarily screwing up under the compression state, the screwing up sequence is as follows: proceeding in a symmetrical manner, namely: if the tension screw type external press-mounting type stator core 1 is circular, preliminary tightening is performed in a circumferential symmetry manner; if the tension screw type external press-fitting stator core 1 is axially symmetrical, preliminary tightening is performed in an axially symmetrical manner.
In the second embodiment, when the step 2 is performed with compaction, the tension screw type external press-fit stator core 1 is placed vertically, that is: the lamination direction of the iron core lamination I2 of the tension screw type external press-mounting stator iron core 1 is parallel to the horizontal plane, the compaction treatment mode is heating compaction treatment, and when the heating compaction treatment is adopted, the heating temperature of the tension screw type external press-mounting stator iron core 1 is 80 ℃. (ii) a The heating and heat preservation time is not more than 24 hours, the heating mode of the tension screw type external press-mounting type stator iron core 1 is a baking furnace heating method, and the baking furnace heating method is specifically that the tension screw type external press-mounting type stator iron core 1 is placed in a baking furnace I5 for heating and heat preservation.
In the second embodiment, the step 3 of re-tightening is performed by using a torque wrench, the tightening force is obtained by re-tightening the laminated iron core with the torque wrench, and the tightening force of each tension screw of the laminated iron core after the compaction process reaches the tightening force of each tension screw of the laminated iron core during the initial tightening process before the compaction process, and the tightening sequence is performed in a symmetrical manner: if the tension screw type external press-mounting type stator core 1 is circular, preliminary tightening is performed in a circumferential symmetry manner; if the tension screw type external press-fitting stator core 1 is axially symmetrical, preliminary tightening is performed in an axially symmetrical manner.
Third embodiment, referring to fig. 2, embodiment 2 a method for manufacturing an iron core of the present invention for a tension screw type internal press-fit stator iron core 6, which comprises the steps of:
step 1, stacking an iron core punching sheet II 8 of a tensioning screw type internal press-mounting type stator iron core 6 in a machine base 7, installing a tensioning screw II 9, axially and sectionally applying pressure to the stator iron core 6, and preliminarily screwing a fastening element, namely a nut II 10, of the tensioning screw II 9 of the tensioning screw type internal press-mounting type stator iron core 6 in a compression state after the iron core punching sheet II 8 is stacked and applied with pressure;
step 2, compacting, namely compacting the primarily screwed tightening screw type internal press-fitting stator core 6;
step 3, tightening the tightening screw II 9 of the tightening screw type internal press-fitting stator iron core 6 subjected to compaction again at normal temperature; (Note: if the compacting treatment is carried out by heating, the operation of tightening the tightening screw II 9 of the tightening screw type internal stator core 6 again in the above step should be carried out after the heated tightening screw type internal stator core 6 is cooled to room temperature.)
And 4, spot welding and fixing, namely spot welding the tensioning screw II 9 and a fastening element, namely a nut II 10, so that the tensioning screw type internal press-fitting stator core 6 is fixed into a whole.
Thus, the lamination molding of the tension screw type press-fit stator core 6 is completed.
Step 1 of the third embodiment is to tension the screw-type internal-press stator core 6 to apply pressure in sections and compress: during the operation of the tension screw type internal press-fit stator core 6, the tension screw type internal press-fit stator core 6 is laminated in the axial segments, and the pressure applied by each axial core segment may preferably be: gradually pressurizing in a segmented mode, namely: the pressure applied by each axial iron core segment of the tension screw type internal pressing stator iron core 6 is gradually increased; the pressure applied to the last axial iron core segment is as follows: the first axial core segment is pressed 1.25 times the pressure. Under the mode of gradually pressurizing in sections, the pressure value applied to the first axial iron core section of the tension screw type internal-pressing stator iron core 6 is a conventional pressure value. The tool used for preliminary tightening is a torque wrench, and the tightening force is a set of fastening elements corresponding to a set of tightening screws ii 9: the tightening force between the nuts II 10 is equivalent to the design requirement value, and the tightening sequence is preferably as follows: the preliminary tightening is carried out in a symmetrical manner, namely: if the tension screw type internal press-fit stator iron core 6 is circular, preliminary tightening is performed in a circumferential symmetry manner; if the tension screw type internal press-fit stator core 6 is axially symmetrical, preliminary tightening is performed in an axially symmetrical manner.
In the third embodiment, the placement state of the tension screw type internal press-fit stator core 6 during the step 2 compacting process is vertical placement, that is: the lamination direction of iron core punching sheets II 8 of the tension screw type internal pressing stator iron core 6 is parallel to the horizontal plane, the compaction treatment mode is vibration aging compaction treatment, and the types of the tension screw type internal pressing stator iron core 6 are a tension screw type internal pressing stator iron core and a tension screw type rotor iron core with a rotor support. Namely: after being laminated and formed, the tension screw type internal press-mounting type stator core and the machine base are vibrated, aged and compacted; and (3) carrying out vibration aging compaction treatment on the rotor iron core with the tension screw type rotor support and the rotor support after laminating and forming.
In the third embodiment, the tool for re-tightening in the step 3 is a torque wrench, and the tightening force is obtained by re-tightening the laminated iron core with the torque wrench so that the tightening force of each of the tension screws of the laminated iron core after the compaction process reaches the tightening force of each of the tension screws of the laminated iron core in the first tightening process before the compaction process. The tightening sequence is a symmetric tightening sequence, namely: if the tension screw type internal pressing stator iron core 6 is circular, screwing again in a circumferential symmetry mode; if the tension screw type internal press-fit stator core 6 is axially symmetrical, re-tightening is performed in an axially symmetrical manner.
Fourth embodiment, referring to fig. 3, embodiment 4 is a method for manufacturing an iron core according to the present invention, which includes the steps of:
step 1, stacking iron core punching sheets III 14 of a rotor iron core 12 with a tension screw rod type rotor support on a rotor support 13, installing a tension screw rod III 15, axially and sectionally applying pressure to the rotor iron core 12 with the tension screw rod type rotor support, and preliminarily screwing a fastening element of the tension screw rod III 15 of the rotor iron core 12 with the tension screw rod type rotor support in a compression state after the iron core punching sheets III 14 are stacked and applied with pressure;
step 2, compacting, namely compacting the rotor iron core 12 with the rotor bracket and the tightening screw rod which is preliminarily screwed;
step 3, when the iron core is at normal temperature, tightening the tightening screw III 15 of the rotor iron core 12 with the tightening screw type rotor support, which is subjected to the tightening treatment, again; (Note: if the compacting treatment in the above step is a specific manner of heating compacting treatment, the step of tightening the tension screw III 15 of the tension screw type rotor core with a rotor holder 12 again should be performed after the heated tension screw type rotor core with a rotor holder 12 is cooled to room temperature.)
And 4, spot welding and fixing, namely spot welding the tension screw III 15 and a fastening element thereof, namely a nut III 16, so that the rotor iron core 12 with the tension screw and the rotor bracket is fixed into a whole.
Thus, the lamination molding of the tension screw type rotor core 12 with the rotor bracket is completed.
In the four-step tightening screw type rotor core 12 with a rotor bracket according to the embodiment of the present invention, the tightening treatment in step 2 may be: and (5) vibrating, aging and compacting. During tight real processing, the placing state of the rotor core 12 with the tension screw type rotor bracket is vertical placing, namely: the lamination direction of iron core punching sheets III 14 of the rotor iron core 12 with the tension screw type rotor support is parallel to the horizontal plane.
The details of the method for manufacturing the rotor core 12 with a rotor holder of the fourth tension screw of the other embodiments of the present invention are substantially the same as those of the method for manufacturing the stator core 6 with an internal tension screw of the third tension screw of the above-described embodiments of the present invention.
Fifth embodiment, referring to fig. 4, and embodiment 5, a method for manufacturing an iron core according to the present invention includes the following steps:
step 1, stacking iron core punching sheets IV 19 of a tensioning screw type main pole iron core 18, installing a tensioning screw IV 20, axially and sectionally applying pressure to the main pole iron core 18, and preliminarily screwing a fastening element, namely a nut IV 21, of the tensioning screw IV 20 of the tensioning screw type main pole iron core 18 in a compression state after the iron core punching sheets IV 19 are stacked and applied with pressure;
step 2, compacting, namely compacting the primarily screwed tightening screw type main pole iron core 18;
step 3, when the iron core is at normal temperature, tightening the tightening screw IV 20 of the tightening screw type main pole iron core 18 which is subjected to tightening treatment again; (Note that if the compacting treatment in the above step is a specific manner of heating compacting treatment, the step of tightening the tension screw IV 20 of the tension screw type main pole iron core 18 again should be performed after the heated tension screw type main pole iron core 18 is cooled to room temperature.)
And 4, spot welding and fixing, namely spot welding the tightening screw IV 20 and a fastening element, namely a nut IV 21, so that the tightening screw type main pole iron core 18 is fixed into a whole.
To this end, the lamination molding of the tension screw type main pole core 18 is completed.
In the embodiment of the invention, the tightening treatment mode of the five-tensioning-screw type main pole iron core adopts heating tightening treatment. In the compacting process, the placing state of the tension screw type main pole iron core 18 is vertical placing, namely: the lamination direction of the core laminations IV 19 of the tension screw type main pole core 18 is parallel to the horizontal plane.
The specific contents of the method for manufacturing a rotor core of a five-tensioning-screw type direct-sleeved rotating shaft according to the embodiment of the present invention are substantially the same as those of the stator core 1 of the one-tensioning-screw type external-press-fit according to the embodiment of the present invention.
According to the invention, the iron core is newly added with compaction treatment in the iron core laminating process, and is screwed again after the compaction treatment and then is spot-welded into a whole, so that the reduction of the compression degree of the iron core in the operation process of the motor is avoided, the laminated iron core does not generate the loosening phenomenon, the vibration of the iron core is reduced, and the noise of the motor is correspondingly reduced. Meanwhile, the iron core of the motor is prevented from generating heat locally in the operation process, and the insulation of a coil embedded in the iron core is prevented from being damaged, so that the electric performance of the motor is ensured. The iron loss of the iron core is reduced, and the electric performance of the motor is improved. On the other hand, after improvement, in the manufacturing process of laminating and molding the iron core according to the improved manufacturing method of the iron core, the stress generated in the process of laminating and assembling the iron core sheets of the iron core is eliminated; meanwhile, the blanking stress generated by the iron core punching sheet of the iron core in the punching process of the last procedure is also eliminated. Therefore, after the iron core is laminated and molded according to the improved manufacturing method of the iron core, the improved iron core is not easy to generate the problems of distortion, deformation and the like. Therefore, the problems that the wire embedding of the iron core in the next process is difficult and the insulation of the embedded coil is damaged are solved, and the electric performance of the motor is finally ensured. In addition, when the improved tension screw type external press-mounting type stator core is sleeved on the stator base in the next procedure, the sleeving is smooth, the working efficiency is improved, scrapping is avoided, and the production cost is reduced.
The above are merely a few exemplary embodiments of the present invention. The scope of the invention as claimed is not limited to the embodiments. All technical solutions equivalent to the present embodiment belong to the protection scope of the present invention. The manufacturing method of the tension screw type laminated iron core is also suitable for manufacturing other similar laminated iron cores.

Claims (2)

1. The manufacturing method of the tension screw type laminated iron core is characterized by comprising the following steps of:
step 1, iron core punching segments are axially segmented and stacked, tensioning screws are installed, axial segmented pressure is applied to each axial iron core segment of an iron core of the iron core, after the iron core punching segments are stacked and segmented and applied with pressure, a fastening element of the tensioning screw of the iron core is preliminarily screwed down in a compression state, the pressure applied by the iron core in the axial segmented pressure is the same, or the pressure applied by the iron core in the axial segmented pressure is increased section by section, and the pressure increase is that the pressure value of the tail segment is 1.1-1.25 times of the pressure value of the first segment;
step 2, compacting treatment, namely, compacting treatment is carried out on the preliminarily screwed iron core, the compacting treatment mode is heating compacting treatment or vibration aging compacting treatment, and the heating temperature of the iron core subjected to the heating compacting treatment is as follows: 70 ℃ to 85 ℃; the heating and heat preservation time is not more than 24 hours;
step 3, when the iron core is at normal temperature, tightening the tightening screw of the iron core which is subjected to compaction treatment again;
and 4, spot welding for fixing, namely spot welding the tensioning screw and the fastening element thereof to fix the iron core into a whole.
2. The method for manufacturing a tension screw type laminated iron core according to claim 1, wherein the iron core is placed in a vertical position during the compacting process of the step 2.
CN201711162596.5A 2017-11-21 2017-11-21 Manufacturing method of tension screw type laminated iron core Active CN107834786B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711162596.5A CN107834786B (en) 2017-11-21 2017-11-21 Manufacturing method of tension screw type laminated iron core

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711162596.5A CN107834786B (en) 2017-11-21 2017-11-21 Manufacturing method of tension screw type laminated iron core

Publications (2)

Publication Number Publication Date
CN107834786A CN107834786A (en) 2018-03-23
CN107834786B true CN107834786B (en) 2020-03-27

Family

ID=61652121

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711162596.5A Active CN107834786B (en) 2017-11-21 2017-11-21 Manufacturing method of tension screw type laminated iron core

Country Status (1)

Country Link
CN (1) CN107834786B (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101640455A (en) * 2008-07-31 2010-02-03 上海电气集团上海电机厂有限公司 Method for machining magnetic-pole cores of AC/AC variable-frequency steel-rolling motor rotors
CN101908797A (en) * 2010-08-06 2010-12-08 天津市天发重型水电设备制造有限公司 Press mounting method for generator stator core stretching screw
CN102208849A (en) * 2011-03-07 2011-10-05 江苏通达动力科技股份有限公司 Hot sleeve shaft technology of wind-power rotor
CN102638137A (en) * 2011-02-10 2012-08-15 马涅蒂-马瑞利公司 Method for building magnetic core including laminations bound into packs for electrical machine
CN203434816U (en) * 2013-09-23 2014-02-12 黄石艾博科技发展有限公司 Stator expansion shaping mold
CN105305740A (en) * 2015-10-24 2016-02-03 江南水利水电工程公司 Stator lamination mounting quality control method
CN106208563A (en) * 2016-08-29 2016-12-07 杭州科德磁业有限公司 A kind of manufacture method of big precision iron core with a high standard

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101640455A (en) * 2008-07-31 2010-02-03 上海电气集团上海电机厂有限公司 Method for machining magnetic-pole cores of AC/AC variable-frequency steel-rolling motor rotors
CN101908797A (en) * 2010-08-06 2010-12-08 天津市天发重型水电设备制造有限公司 Press mounting method for generator stator core stretching screw
CN102638137A (en) * 2011-02-10 2012-08-15 马涅蒂-马瑞利公司 Method for building magnetic core including laminations bound into packs for electrical machine
CN102208849A (en) * 2011-03-07 2011-10-05 江苏通达动力科技股份有限公司 Hot sleeve shaft technology of wind-power rotor
CN203434816U (en) * 2013-09-23 2014-02-12 黄石艾博科技发展有限公司 Stator expansion shaping mold
CN105305740A (en) * 2015-10-24 2016-02-03 江南水利水电工程公司 Stator lamination mounting quality control method
CN106208563A (en) * 2016-08-29 2016-12-07 杭州科德磁业有限公司 A kind of manufacture method of big precision iron core with a high standard

Also Published As

Publication number Publication date
CN107834786A (en) 2018-03-23

Similar Documents

Publication Publication Date Title
US7202587B2 (en) Method and apparatus for the mounting of and circumferential displacement of radial forces in a stator core assembly
JP2001518275A (en) Modular stator core and method of manufacturing the same
CN101673984B (en) Clamp for rotor mechanical torsion chute
CN201048306Y (en) Top drive motor stator iron core
CN102005831B (en) Stator core of large wind driven generator and manufacturing method thereof
CN107834786B (en) Manufacturing method of tension screw type laminated iron core
CN106253538B (en) A kind of motor and its conducting ring fixed support device
CN104038000B (en) Dismantled and assembled copper cage rotor core laminates hot cover process
CN106981958A (en) A kind of internal permanent magnet synchronous motor rotor assembling method
US4188712A (en) Method for making stators for dynamoelectric machines
CN101226825A (en) Embedding mold and embedding method for coil kit in electro-hydraulic servo valve
CN107919755A (en) A kind of permanent-magnetic synchronous motor rotor field structure and motor
CN203135597U (en) An insulating structure of the tensioning screw rod of the stator core of a hydraulic generator
CN104362813B (en) Magnetic steel mounting method for 50kW ultrahigh permanent magnet generator rotor
CN203317339U (en) Hot sleeve pressurizing device of shaft and sleeve
CN206226144U (en) Stator core compressing structure, stator and motor
CN207782616U (en) A kind of servo motor assembled piece type stator iron core coiling clamping device
CN108880137B (en) On-site horizontal type edge section iron core stacking process for steam turbine generator
CN104779752A (en) Stator floating iron core locating and tensioning device and stator floating iron core installing method
EP2642646B1 (en) Method for manufacturing a stator
CN203840087U (en) External rotor motor of refrigeration compressor
CN102751824A (en) Stator pressing combination for efficient steel shell NEMA (national electrical manufacturers association) motor
CN202696405U (en) Press assembly combination for high-efficiency national electrical manufacturers association (NEMA) steel plate shell motor stator
CN201426054Y (en) Stator core compression structure
CN211959015U (en) Magnetic steel mounting device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant