Universal positioning press-fitting die for internally-wound stator and use method of universal positioning press-fitting die

Abstract

The invention discloses a universal positioning press-fitting die for an internally-wound stator and a use method. The press-fitting die comprises a bottom plate, a positioning block, a spring, a main mandrel, an auxiliary mandrel, an upper positioning die and a lower positioning die, the method comprises the steps that (1) the bottom plate is fixedly installed on the workbench; (2) a positioning block is welded to the bottom of a through hole II of the main mandrel; (3) the inner positioning section of the auxiliary mandrel is installed in the spring and installed in the through hole II of the main mandrel with the spring facing downwards; (4) the baffle of the main mandrel is installed in the through hole I of the bottom plate to be fixed; (5) a lower positioning die sequentially penetrates through the auxiliary mandrel and the main mandrel and is fixed to the bottom plate; (6) a lower workpiece is installed; (7) an upper workpiece is installed; (8) an upper positioning die penetrates through the auxiliary mandrel and is assembled on the upper workpiece; and (9) parameters of the pressure equipment are adjusted, the pressure equipment is started, the auxiliary mandrel, the upper positioning die and the upper workpiece move downwards synchronously, and workpiece press fitting is completed. The positioning press-fitting device is suitable for positioning press-fitting operation of the stator winding iron core and the machine shell, and is not limited to the application range of auxiliary press equipment.

Description

Technical Field

[0001] The invention relates to the technical field of motors, and in particular to a universal positioning press-fitting die for an inner winding stator and a use method thereof. Background Art

[0002] With the continuous development of motor technology and the increasing requirements of various industries for motor performance, the research and application of inner-wound stators have become increasingly widespread. In the process of industrial automation, the requirements for motor accuracy, efficiency and reliability are becoming higher and higher. At the same time, the trend of energy saving and environmental protection has also prompted people to study more efficient motor structures; mainly reflected in brushless DC motors, stepper motors, AC servo motors, etc. In order to meet the requirements of the inner-wound stator to achieve stronger motor performance in a limited space, the wire slot area is usually increased to increase the slot fill rate, and the press-fitting space will be limited, resulting in an increase in the difficulty of the press-fitting process; conventional press-fitting methods are difficult to ensure press-fitting quality and consistency, and are prone to the risk of stator scrapping.

[0003] At present, a ring pressing tool is used for the inner winding stator press-fitting process; after the casing is preheated to a certain temperature, it is vertically upward, and the stator winding core is manually placed vertically on the casing guide port (about C2), and then the stator winding core is pressed into the casing through the force of the pressure equipment. The main function of the ring pressing tool used in the prior art is to transfer the equipment pressure to the force-bearing surface of the stator winding core. It is difficult to achieve its positioning function. It mainly relies on manual feel to align. If you are not careful, it is easy to offset during the press-fitting process, and the stator winding core and the casing will get stuck, resulting in the scrapping of the stator; secondly, the crimping area of ​​the stator winding core is small, usually a circular ring area with a width of only 1-2mm, so that the ring pressing tool is usually designed to be thin, and the force-bearing area is small. Under the condition of large force, the ring pressing tool is easy to be damaged, resulting in the stator failing to be normally pressed into place and being scrapped. In summary, the existing technology has the disadvantages of large human differences, low operating efficiency, poor consistency, high risk of scrapping, and personal safety hazards. Summary of the invention

[0004] The purpose of the present invention is to provide a universal positioning press-fitting die for an inner winding stator and a use method thereof.

[0005] The technical solution adopted to achieve the technical purpose of the present invention is as follows: a universal positioning press-fitting die for an inner winding stator comprises: a bottom plate, a positioning block, a spring, a main core shaft, a secondary core shaft, an upper positioning die, and a lower positioning die.

[0006] A through hole I is provided at the center of the plate surface of the bottom plate, and a through groove is provided on one side of the through hole I.

[0007] A through hole II is provided at the center of the main spindle along the axis, and the through hole II is adapted to the diameter of the positioning block.

[0008] A baffle is provided at the bottom of the main core shaft.

[0009] The baffle plate is adapted to the through hole I of the base plate and is installed or removed through the guiding effect of the through groove.

[0010] The secondary core shaft comprises an inner positioning section and an axial positioning section.

[0011] The diameter of the inner positioning section is smaller than the inner diameter of the spring.

[0012] The axial positioning section is adapted to the through hole II of the main spindle.

[0013] The upper positioning mold and the lower positioning mold are arranged at intervals, and grooves I and II are respectively provided on opposite sides.

[0014] The groove I is used to avoid the vulnerable part of the upper end of the upper workpiece.

[0015] The groove II is used to avoid the vulnerable part of the lower end of the upper workpiece.

[0016] A through hole III is provided at the center of the groove I of the upper positioning die, and the through hole III is adapted to the diameter of the axial positioning section of the auxiliary core shaft.

[0017] The side wall of the groove I is provided with a plurality of wire outlet grooves.

[0018] A through hole IV is provided at the center of the groove II of the lower positioning die, and the through hole IV is adapted to the outer diameter of the main core shaft.

[0019] A positioning groove is provided on one side of the lower positioning die relative to the upper positioning die for positioning the lower workpiece.

[0020] The positioning block is welded in the through hole II of the main core shaft.

[0021] The baffle of the main core shaft is installed in the through hole I of the bottom plate, and the main core shaft passes through the through hole IV of the lower positioning mold.

[0022] The lower workpiece is mounted on the positioning groove of the lower positioning die.

[0023] One end of the spring is sleeved on the inner positioning section of the auxiliary core shaft, and the other end extends into the through hole II of the main core shaft to abut against the positioning block.

[0024] The upper end of the upper workpiece abuts against the upper positioning mold, and the lower end is placed in the lower workpiece.

[0025] After the axial positioning section of the auxiliary mandrel passes through the upper workpiece, it extends out of the through hole III of the upper positioning die.

[0026] Use pressure equipment to press down from the top of the upper positioning die, and press the upper workpiece into the lower workpiece through the compression spring to complete the press-fitting of the workpieces.

[0027] Furthermore, the upper workpiece includes a stator winding core.

[0028] Furthermore, the outgoing wires of the stator winding core are led out from the outgoing wire slots of the upper positioning mold.

[0029] Further, the lower workpiece includes a casing.

[0030] Furthermore, a plurality of screw holes I are provided on the surface of the bottom plate.

[0031] The screw holes I of the base plate are fixed on the workbench by installing screws b.

[0032] Furthermore, a plurality of screw holes II are provided on the surface of the bottom plate.

[0033] The positioning pressing die also includes a handle.

[0034] The handle is mounted on the screw hole II of the base plate by means of mounting screws a.

[0035] Furthermore, the upper positioning die is provided with a stopper for positioning the upper workpiece.

[0036] Furthermore, the upper positioning die and the lower positioning die are changed according to the actual requirements of press-fitting the workpiece.

[0037] A method for press-fitting a workpiece using the above-mentioned positioning press-fitting die comprises the following steps:

[0038] 1) Fix the base plate on the workbench and install the handle on the base plate.

[0039] 2) Install the positioning block into the bottom of the through hole II of the main spindle and weld it firmly.

[0040] 3) Install the inner positioning section of the auxiliary core shaft into the spring, and install it into the through hole II of the main core shaft with the spring facing downward.

[0041] 4) Place the baffle of the main spindle in the through groove of the base plate, and horizontally insert it into the through hole I of the base plate for fixing.

[0042] 5) Pass the lower positioning die through the secondary mandrel and the main mandrel in sequence and fix them on the base plate.

[0043] 6) Install the lower workpiece so that the bottom of the lower workpiece is installed on the positioning groove of the lower positioning mold.

[0044] 7) Install the upper workpiece so that the bottom of the upper workpiece is connected to the top of the lower workpiece.

[0045] 8) Pass the upper positioning die through the secondary mandrel and assemble it on the upper workpiece, with the lower end of the upper positioning die abutting against the upper workpiece.

[0046] 9) Adjust the parameters of the pressure equipment, start the pressure equipment, and the auxiliary mandrel, the upper positioning die and the upper workpiece move downward synchronously to complete the workpiece press fitting.

[0047] Furthermore, the parameters of the pressure equipment include pressing depth and pressure magnitude.

[0048] The technical effect of the present invention is unquestionable. The present invention provides a universal positioning and pressing die for an inner winding stator to replace the traditional manual pressing method and simultaneously ensure the pressing quality, efficiency and consistency. It is mainly suitable for the positioning and pressing operation of the stator winding core and the casing, and is not limited to the use scope of the auxiliary pressing equipment.

[0049] The present invention adopts a universal positioning press-fitting die to ensure the mechanical flexible positioning of the stator press-fitting process, which can realize functions such as rapid positioning and accurate and stable crimping, and meet the rapid changeover capability; the method is easy to operate and highly efficient, and avoids human differences to a great extent, while ensuring the press-fitting quality and consistency of the stator winding core and the housing, thereby improving the product qualification rate and reducing personal safety risks to a certain extent. The application environment of the universal positioning press-fitting die is relatively flexible, and it can be used in conjunction with hand presses, cylinder presses, servo presses and other equipment, and is suitable for the production model needs of enterprises with multiple varieties and small batches.

[0050] When the universal positioning press-fitting die for the inner winding stator provided by the present invention is used for press-fitting, no manual assistance is required, the risk of mechanical crushing is avoided, and the operation is more convenient and simple, the positioning is accurate, and human differences are avoided; thereby, the press-fitting efficiency of the inner winding stator is truly improved, while the press-fitting quality and consistency are guaranteed.

[0051] The invention has a novel structure, is concise and beautiful, and has flexible adjustment to ensure accurate positioning of the workpiece; the invention has good compatibility and interchangeability, and can ensure rapid model change; the invention meets the requirements of safe production and multi-variety small batch production, and simultaneously ensures the efficiency, quality and consistency of the inner winding stator press-fitting. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 This is a schematic diagram of the inner winding stator during press-fitting operation;

[0053] Figure 2 is a schematic diagram of the base plate; Figure 2 (a) is a top view of the base plate; Figure 2 (b) is a front view of the base plate;

[0054] Figure 3 This is a schematic diagram of the positioning block; Figure 3 (a) is the front view of the positioning block; Figure 3 (b) is a side view of the positioning block;

[0055] Figure 4 Schematic diagram of the main spindle; Figure 4 (a) is a side view of the main spindle; Figure 4 (b) is a cross-sectional view of the main spindle;

[0056] Figure 5 It is a schematic diagram of the secondary mandrel; Figure 5 (a) is a side view of the secondary mandrel; Figure 5 (b) is a front view of the secondary mandrel;

[0057] Figure 6 Schematic diagram of the upper positioning mold; Figure 6 (a) is the front view of the upper positioning die; Figure 6 (b) is a cross-sectional view of the upper positioning mold;

[0058] Figure 7 Schematic diagram of the lower positioning mold; Figure 7 (a) is the front view of the lower positioning mold; Figure 7 (b) is a cross-sectional view of the lower positioning mold;

[0059] Figure 8 This is the front view of the universal positioning press-fitting die assembly for the inner winding stator;

[0060] Fig. 9 This is a bottom view of the assembly of the universal positioning press-fitting die for the inner winding stator;

[0061] In the figure, a base plate 101, a through hole I1011, a through groove 1012, a screw hole I1013, a screw hole II1014, a positioning block 102, a spring 103, a main core shaft 104, a through hole II1041, a baffle 1042, a secondary core shaft 105, an inner positioning section 1051, an axial positioning section 1052, a handle 106, a mounting screw a107, a mounting screw b108, an upper positioning mold 109, a groove I1091, a through hole III1092, a wire outlet groove 1093, a lower positioning mold 110, a groove II1101, a through hole IV1102, a positioning groove 1103, a stator winding core 2, a casing 3, a pressure device 4, and a wire outlet 5. DETAILED DESCRIPTION

[0062] The present invention is further described below in conjunction with the embodiments, but it should not be understood that the above subject matter of the present invention is limited to the following embodiments. Without departing from the above technical ideas of the present invention, various substitutions and changes are made according to the common technical knowledge and customary means in the art, which should all be included in the protection scope of the present invention.

[0063] Embodiment 1:

[0064] See also Figures 1 to 9 A universal positioning press-fitting die for an inner winding stator includes: a bottom plate 101, a positioning block 102, a spring 103, a main core shaft 104, a secondary core shaft 105, an upper positioning die 109, and a lower positioning die 110.

[0065] A through hole I1011 is provided at the center of the plate surface of the bottom plate 101 , and a through groove 1012 is provided on one side of the through hole I1011 .

[0066] A through hole II1041 is provided at the center of the main spindle 104 along the axis, and the through hole II1041 is adapted to the diameter of the positioning block 102 .

[0067] A baffle 1042 is disposed at the bottom of the main spindle 104 .

[0068] The baffle 1042 is adapted to the through hole I1011 of the bottom plate 101 and is installed or removed through the guiding effect of the through groove 1012.

[0069] The auxiliary spindle 105 includes an inner positioning section 1051 and an axial positioning section 1052 .

[0070] The diameter of the inner positioning section 1051 is smaller than the inner diameter of the spring 103 .

[0071] The axial positioning section 1052 is adapted to the through hole II1041 of the main spindle 104 .

[0072] The upper positioning mold 109 and the lower positioning mold 110 are arranged at intervals, and a groove I1091 and a groove II1101 are respectively provided on opposite sides.

[0073] The groove I1091 is used to avoid the vulnerable part of the upper end of the upper workpiece.

[0074] The groove II1101 is used to avoid the vulnerable part of the lower end of the upper workpiece.

[0075] A through hole III1092 is provided at the center of the groove I1091 of the upper positioning die 109 , and the through hole III1092 is adapted to the diameter of the axial positioning section 1052 of the secondary core shaft 105 .

[0076] The side wall of the groove I1091 is provided with a plurality of wire outlet grooves 1093 .

[0077] A through hole IV1102 is provided at the center of the groove II1101 of the lower positioning mold 110 , and the through hole IV1102 is adapted to the outer diameter of the main core shaft 104 .

[0078] The lower positioning die 110 is provided with a positioning groove 1103 on one side opposite to the upper positioning die 109 for positioning the lower workpiece.

[0079] The positioning block 102 is welded in the through hole II1041 of the main core shaft 104 .

[0080] The baffle 1042 of the main spindle 104 is installed in the through hole I1011 of the bottom plate 101 , and the main spindle 104 passes through the through hole IV1102 of the lower positioning mold 110 .

[0081] The lower workpiece is mounted on the positioning groove 1103 of the lower positioning die 110 .

[0082] One end of the spring 103 is sleeved on the inner positioning section 1051 of the auxiliary spindle 105 , and the other end extends into the through hole II1041 of the main spindle 104 to abut against the positioning block 102 .

[0083] The upper end of the upper workpiece abuts against the upper positioning die 109, and the lower end is placed in the lower workpiece.

[0084] After the axial positioning section 1052 of the secondary mandrel 105 passes through the upper workpiece, it extends out of the through hole III1092 of the upper positioning die 109 .

[0085] The pressure device 4 is used to press downward from the top of the upper positioning die 109, and the upper workpiece is pressed into the lower workpiece by compressing the spring 103, thereby completing the press-fitting of the workpieces.

[0086] Embodiment 2:

[0087] A universal positioning and pressing die for an inner winding stator, the main technical content of which is shown in Example 1. Furthermore, the upper workpiece includes a stator winding core 2.

[0088] Embodiment 3:

[0089] A universal positioning and pressing die for an inner winding stator, the main technical content of which is shown in any one of embodiments 1 to 2. Furthermore, the outgoing wire 5 of the stator winding core 2 is led out from the outgoing wire slot 1093 of the upper positioning die 109.

[0090] Embodiment 4:

[0091] A universal positioning and pressing die for an inner winding stator, the main technical content of which is shown in any one of embodiments 1 to 3, and further, the lower workpiece includes a casing 3.

[0092] Embodiment 5:

[0093] A universal positioning and pressing die for an inner winding stator, the main technical content of which is shown in any one of embodiments 1 to 4. Furthermore, a plurality of screw holes I1013 are provided on the surface of the base plate 101.

[0094] The screw holes I1013 of the base plate 101 are fixed on the workbench by installing screws b108.

[0095] Embodiment 6:

[0096] A universal positioning and pressing die for an inner winding stator, the main technical content of which is shown in any one of embodiments 1 to 5. Furthermore, a plurality of screw holes II1014 are provided on the surface of the base plate 101.

[0097] The positioning pressing die further includes a handle 106 .

[0098] The handle 106 is installed at the screw hole II1014 of the base plate 101 by installing screws a107.

[0099] Embodiment 7:

[0100] A universal positioning and pressing die for an inner winding stator, the main technical content of which is shown in any one of embodiments 1 to 6. Furthermore, the upper positioning die 109 is provided with a stop for positioning the upper workpiece.

[0101] Embodiment 8:

[0102] A universal positioning and pressing die for an inner winding stator, the main technical content of which is shown in any one of embodiments 1 to 7. Furthermore, the upper positioning die 109 and the lower positioning die 110 are changed according to the actual requirements of the press-fitted workpiece.

[0103] Embodiment 9:

[0104] A method for press-fitting a workpiece using the positioning press-fitting die described in any one of embodiments 1 to 8, comprising the following steps:

[0105] 1) Fix the base plate on the workbench and install the handle on the base plate.

[0106] 2) Install the positioning block into the bottom of the through hole II of the main spindle and weld it firmly.

[0107] 3) Install the inner positioning section of the auxiliary core shaft into the spring, and install it into the through hole II of the main core shaft with the spring facing downward.

[0108] 4) Place the baffle of the main spindle in the through groove of the base plate, and horizontally insert it into the through hole I of the base plate for fixing.

[0109] 5) Pass the lower positioning die through the secondary mandrel and the main mandrel in sequence and fix them on the base plate.

[0110] 6) Install the lower workpiece so that the bottom of the lower workpiece is installed on the positioning groove of the lower positioning mold.

[0111] 7) Install the upper workpiece so that the bottom of the upper workpiece is connected to the top of the lower workpiece.

[0112] 8) Pass the upper positioning die through the secondary mandrel and assemble it on the upper workpiece, with the lower end of the upper positioning die abutting against the upper workpiece.

[0113] 9) Adjust the parameters of the pressure equipment, start the pressure equipment, and the auxiliary mandrel, the upper positioning die and the upper workpiece move downward synchronously to complete the workpiece press fitting.

[0114] Embodiment 10:

[0115] A universal positioning and pressing method for an inner winding stator. The main technical content is shown in Example 9. Furthermore, the parameters of the pressure equipment include the pressing depth and the pressure size.

[0116] Embodiment 11:

[0117] See also Figures 1 to 9 A universal positioning press-fitting die for an inner winding stator includes: a bottom plate 101, a positioning block 102, a spring 103, a main core shaft 104, a secondary core shaft 105, an upper positioning die 109, and a lower positioning die 110.

[0118] A through hole I1011 is provided at the center of the plate surface of the bottom plate 101 , and a through groove 1012 is provided on one side of the through hole I1011 .

[0119] A through hole II1041 is provided at the center of the main spindle 104 along the axis, and the through hole II1041 is adapted to the diameter of the positioning block 102 .

[0120] A baffle 1042 is disposed at the bottom of the main spindle 104 .

[0121] The baffle 1042 is adapted to the through hole I1011 of the bottom plate 101 and is installed or removed through the guiding effect of the through groove 1012.

[0122] The auxiliary spindle 105 includes an inner positioning section 1051 and an axial positioning section 1052 .

[0123] The diameter of the inner positioning section 1051 is smaller than the inner diameter of the spring 103 .

[0124] The axial positioning section 1052 is adapted to the through hole II1041 of the main spindle 104 .

[0125] The axial positioning section 1052 has relatively high requirements for roughness and precision.

[0126] The upper positioning mold 109 and the lower positioning mold 110 are arranged at intervals, and a groove I1091 and a groove II1101 are respectively provided on opposite sides.

[0127] The groove I1091 is used to avoid the vulnerable part of the upper end of the upper workpiece (such as the enameled wire at the upper end of the stator winding core).

[0128] The groove II1101 is used to avoid the vulnerable part of the lower end of the upper workpiece (such as the enameled wire at the lower end of the stator winding core).

[0129] A through hole III1092 is provided at the center of the groove I1091 of the upper positioning die 109 , and the through hole III1092 is adapted to the diameter of the axial positioning section 1052 of the secondary core shaft 105 .

[0130] The side wall of the groove I1091 is provided with a plurality of wire outlet grooves 1093 .

[0131] A through hole IV1102 is provided at the center of the groove II1101 of the lower positioning mold 110 , and the through hole IV1102 is adapted to the outer diameter of the main core shaft 104 .

[0132] The lower positioning die 110 is provided with a positioning groove 1103 on one side opposite to the upper positioning die 109 for positioning the lower workpiece.

[0133] The positioning block 102 is welded in the through hole II1041 of the main core shaft 104 .

[0134] The baffle 1042 of the main spindle 104 is installed in the through hole I1011 of the bottom plate 101 , and the main spindle 104 passes through the through hole IV1102 of the lower positioning mold 110 .

[0135] The lower workpiece is mounted on the positioning groove 1103 of the lower positioning die 110 .

[0136] One end of the spring 103 is sleeved on the inner positioning section 1051 of the auxiliary spindle 105 , and the other end extends into the through hole II1041 of the main spindle 104 to abut against the positioning block 102 .

[0137] The upper end of the upper workpiece abuts against the upper positioning die 109, and the lower end is placed in the lower workpiece.

[0138] After the axial positioning section 1052 of the secondary mandrel 105 passes through the upper workpiece, it extends out of the through hole III1092 of the upper positioning die 109 .

[0139] The pressure device 4 is used to press downward from the top of the upper positioning die 109, and the upper workpiece is pressed into the lower workpiece by compressing the spring 103, thereby completing the press-fitting of the workpieces.

[0140] Embodiment 12:

[0141] A universal positioning and pressing die for an inner winding stator, the main technical content of which is shown in Example 11. Furthermore, the upper workpiece includes a stator winding core 2.

[0142] Embodiment 13:

[0143] A universal positioning and pressing die for an inner winding stator, the main technical content of which is shown in any one of Examples 11 to 12. Furthermore, the output wire 5 of the stator winding core 2 (such as the three-phase lead wire of the stator winding core) is led out from the output wire slot 1093 of the upper positioning die 109.

[0144] Embodiment 14:

[0145] A universal positioning and pressing die for an inner winding stator, the main technical content of which is shown in any one of Examples 11 to 13, and further, the lower workpiece includes a casing 3.

[0146] Embodiment 15:

[0147] A universal positioning and pressing die for an inner winding stator, the main technical content of which is shown in any one of Examples 11 to 14. Furthermore, four screw holes I1013 are provided on the surface of the base plate 101.

[0148] The screw holes I1013 of the base plate 101 are fixed to the workbench by four mounting screws b108.

[0149] Embodiment 16:

[0150] A universal positioning and pressing die for an inner winding stator, the main technical content of which is shown in any one of Examples 11 to 15. Furthermore, four screw holes II1014 are provided on the surface of the base plate 101.

[0151] The positioning pressing die also includes two handles 106 .

[0152] The handle 106 is mounted on the screw hole II1014 of the base plate 101 by means of four mounting screws a107.

[0153] Embodiment 17:

[0154] A universal positioning and pressing die for an inner winding stator, the main technical content of which is shown in any one of Examples 11 to 16. Furthermore, the upper positioning die 109 is provided with a stop for positioning the upper workpiece.

[0155] Embodiment 18:

[0156] A universal positioning and pressing die for an inner winding stator, the main technical content of which is shown in any one of embodiments 11 to 17. Furthermore, the upper positioning die 109 and the lower positioning die 110 are changed according to the actual requirements of the press-fitted workpiece.

[0157] Embodiment 19:

[0158] A method for press-fitting a workpiece using the positioning press-fitting die described in any one of Examples 11-18, comprising the following steps:

[0159] 1) Fix the base plate on the workbench and install the handle on the base plate.

[0160] 2) Install the positioning block into the bottom of the through hole II of the main spindle and weld it firmly.

[0161] 3) Install the inner positioning section of the auxiliary core shaft into the spring, and install it into the through hole II of the main core shaft with the spring facing downward.

[0162] 4) Place the baffle of the main spindle in the through groove of the base plate, and horizontally insert it into the through hole I of the base plate for fixing.

[0163] 5) Pass the lower positioning die through the secondary mandrel and the main mandrel in sequence and fix them on the base plate.

[0164] 6) Install the lower workpiece so that the bottom of the lower workpiece is installed on the positioning groove of the lower positioning mold.

[0165] 7) Install the upper workpiece so that the bottom of the upper workpiece is connected to the top of the lower workpiece.

[0166] 8) Pass the upper positioning die through the secondary mandrel and assemble it on the upper workpiece, with the lower end of the upper positioning die abutting against the upper workpiece.

[0167] 9) Adjust the parameters of the pressure equipment, start the pressure equipment, and the auxiliary mandrel, the upper positioning die and the upper workpiece move downward synchronously to complete the workpiece press fitting.

[0168] Embodiment 20:

[0169] A universal positioning and pressing method for an inner winding stator. The main technical content is shown in Example 19. Furthermore, the parameters of the pressure equipment include the pressing depth and the pressure size.

[0170] Embodiment 21:

[0171] See also Figures 1 to 9 , a universal positioning press-fitting die for inner winding stators, a universal positioning press-fitting die for inner winding stators and a method of use, the main technical contents include:

[0172] A universal positioning press-fitting die for an inner winding stator and a method of use thereof are mainly suitable for the rapid positioning and press-fitting of a stator winding core and a housing, and meet the capability of rapid mold changeover. A universal positioning press-fitting die for an inner winding stator comprises a bottom plate 101, a positioning block 102, a spring 103, a main spindle 104, a secondary spindle 105, two handles 106, four mounting screws a107, four mounting screws b108, an upper positioning die 109, and a lower positioning die 110.

[0173] 1. The general positioning and pressing die for the inner winding stator is as follows:

[0174] 1) Base plate 101: It is placed on the workbench as a motherboard, and serves as a positioning support and connection for other components; 4 through holes (including countersunk holes) are evenly drilled on the surface to cooperate with mounting screws b108 for fastening to the workbench; 4 threaded holes are evenly drilled on the surface to cooperate with mounting screws a107 for fastening to the two handles 106; 1 through groove (arc + trumpet shape) is opened, and the arc part cooperates with the arc surface of the main spindle 104, and the trumpet shape provides a guide for the horizontal installation or disassembly of the main spindle 104.

[0175] 2) Positioning block 102: It is cylindrical and is inserted into the inner hole of the main core shaft 104 for positioning and welded closed.

[0176] 3) Spring 103: It is a common standard part, installed in the main spindle 104, and is used to support the elastic movement of the auxiliary spindle 105.

[0177] 4) Main spindle 104: The overall shape is "T"-shaped, with a higher outer circle precision, mainly used for positioning with the lower part of the casing; the step is waist-shaped, and its arc surface is mainly used for positioning with the arc surface of the through groove of the bottom plate 101, and its opposite side size is slightly smaller than the minimum width of the trumpet shape of the bottom plate 101, which is mainly convenient for horizontal loading or unloading of the main spindle 104; the inside is drilled with a through hole, and the roughness and precision requirements are relatively high, which is mainly used for axial elastic positioning with the auxiliary spindle 105.

[0178] 5) Secondary mandrel 105: It is cylindrical and divided into two sections. The small diameter section is slightly smaller than the inner diameter of the spring 103, mainly to enable it to be embedded in the spring 103 for positioning; the large diameter section has higher requirements for roughness and precision, and is mainly used for axial elastic positioning with the inner hole of the main mandrel 104.

[0179] 6) Handle 106: It is a common standard part, which is convenient for holding and carrying the press-fit die as a whole, and is fastened to the base plate 101 with the mounting screws a107.

[0180] 7) Mounting screw a107 and mounting screw b108: They are common standard parts and serve as installation and fixing functions.

[0181] 8) Upper positioning die 109: mainly in the shape of a "cap", used for positioning with the upper workpiece (such as the stator winding core). A through hole is drilled in the center for axial positioning with the secondary core shaft 105, the bottom pin groove is mainly used to avoid the vulnerable parts of the workpiece (such as the enameled wire on the upper end of the stator winding core), the side milling pin processing 3 grooves are used for leading out the vulnerable parts of the workpiece (such as the three-phase lead-out wire of the stator winding core), and the bottom pin stop is used for positioning with the workpiece (such as the stress-bearing annular surface of the stator winding core).

[0182] 9) Lower positioning die 110: used for positioning with the lower workpiece (such as the housing). A through hole is drilled in the center for axial matching and positioning with the main core shaft 104. The upper pin groove is used to avoid the vulnerable parts of the workpiece (such as the enameled wire at the lower end of the stator winding core). The top pin stop is used for positioning with the workpiece (such as the stress-bearing annular surface of the housing).

[0183] 2. The method of use when pressing the inner winding stator is as follows:

[0184] 1) Place the base plate 101 stably on the workbench of the arbor press, cylinder press or servo press, and fasten it with 4 mounting screws b108;

[0185] 2) Fasten the two handles 106 and the base plate 101 with the four mounting screws a107;

[0186] 3) Insert the positioning block 102 into the inner hole at the bottom of the main mandrel 104 for positioning (leave a suitable welding depth), and weld it firmly from the bottom;

[0187] 4) Insert the small diameter end of the secondary spindle 105 into the spring 103 to position it, and then install the entire spindle 105 into the main spindle 104 with the spring 103 facing downwards;

[0188] 5) Place the assembly components of steps 3) to 4) above (hereinafter referred to as "middle positioning mold") at a suitable position near the bottom plate 101 and place it steadily;

[0189] 6) The lower positioning die 110 is passed from top to bottom through the secondary mandrel 105 and is positioned with the main mandrel 104;

[0190] 7) Load the lower workpiece (such as a housing) from top to bottom so that the lower part is positioned with the stopper of the lower positioning mold 110, and load the upper workpiece (such as a stator winding core) from top to bottom to connect with the upper part of the lower workpiece (such as a housing);

[0191] 8) Assemble and position the upper positioning die 109 with the auxiliary mandrel 105 from top to bottom, so that the lower part and the upper workpiece (such as the stator winding core) are positioned, and at the same time, the vulnerable part of the upper workpiece (such as the three-phase lead wire of the stator winding core) is led out from the opening slot;

[0192] 9) The assembly of steps 5) to 8) is horizontally installed into the through groove of the bottom plate 101 with the opposite side of the waist-shaped step of the main core shaft 104 facing the straight line, and then the main core shaft 104 is rotated 90° clockwise so that the two arc surfaces are aligned;

[0193] 10) Adjust the parameters of the pressure equipment according to the technical requirements. Under safe environmental conditions, start the pressure equipment, that is, the pressure head moves downward, and the auxiliary core shaft 105, the upper positioning die 109 and the upper workpiece (such as the stator winding core) move downward synchronously, and the stator press-fitting is completed.

[0194] 3. Other instructions

[0195] The middle positioning mold (mentioned in the above Item 2 and Item 5)) is a universal mold, and the upper positioning mold 109 and the lower positioning mold 110 can be quickly changed according to the actual needs of the press-fitted workpiece (inner winding stator).

[0196] The universal positioning press-fitting die for inner-wound stators does not require manual assistance during the press-fitting process, thus avoiding the risk of mechanical crushing injuries. The operation is more convenient and simple, the positioning is accurate, and human differences are avoided. This truly improves the press-fitting efficiency of the inner-wound stator while ensuring the press-fitting quality and consistency.

Claims

1. A universal positioning press-fitting die for inner winding stator, characterized in that: include: A bottom plate (101), a positioning block (102), a spring (103), a main spindle (104), a secondary spindle (105), an upper positioning die (109), and a lower positioning die (110); A through hole I (1011) is provided at the center of the plate surface of the bottom plate (101), and a through groove (1012) is provided on one side of the through hole I (1011); A through hole II (1041) is provided at the center of the main core shaft (104) along the axis, and the through hole II (1041) is adapted to the diameter of the positioning block (102); A baffle (1042) is provided at the bottom of the main core shaft (104); The baffle (1042) is adapted to the through hole I (1011) of the bottom plate (101), and is installed or removed through the guiding effect of the through groove (1012); The secondary core shaft (105) comprises an inner positioning section (1051) and an axial positioning section (1052). The diameter of the inner positioning section (1051) is smaller than the inner diameter of the spring (103). The axial positioning section (1052) is adapted to the through hole II (1041) of the main core shaft (104); The upper positioning mold (109) and the lower positioning mold (110) are arranged at intervals, and groove I (1091) and groove II (1101) are respectively provided on opposite sides; The groove I (1091) is used to avoid the vulnerable part of the upper end of the upper workpiece; The groove II (1101) is used to avoid the vulnerable part of the lower end of the upper workpiece; A through hole III (1092) is provided at the center of the groove I (1091) of the upper positioning die (109), and the through hole III (1092) is adapted to the diameter of the axial positioning section (1052) of the auxiliary mandrel (105); The side wall of the groove I (1091) is provided with a plurality of wire outlet grooves (1093); A through hole IV (1102) is provided at the center of the groove II (1101) of the lower positioning mold (110), and the through hole IV (1102) is adapted to the outer diameter of the main core shaft (104); A positioning groove (1103) is provided on one side of the lower positioning die (110) opposite to the upper positioning die (109) for positioning the lower workpiece; The positioning block (102) is welded in the through hole II (1041) of the main core shaft (104); The baffle plate (1042) of the main spindle (104) is installed in the through hole I (1011) of the bottom plate (101), and the main spindle (104) passes through the through hole IV (1102) of the lower positioning mold (110); The lower workpiece is mounted on the positioning groove (1103) of the lower positioning die (110); One end of the spring (103) is sleeved on the inner positioning section (1051) of the auxiliary core shaft (105), and the other end extends into the through hole II (1041) of the main core shaft (104) to abut against the positioning block (102); The upper end of the upper workpiece abuts against the upper positioning mold (109), and the lower end is placed in the lower workpiece; After the axial positioning section (1052) of the auxiliary mandrel (105) passes through the upper workpiece, it extends out of the through hole III (1092) of the upper positioning die (109); The pressure device (4) is used to press downward from the top of the upper positioning die (109), and the upper workpiece is pressed into the lower workpiece through the compression spring (103), thereby completing the press-fitting of the workpieces.

2. The universal positioning press-fitting die for inner winding stator according to claim 1, characterized in that: The upper workpiece comprises a stator winding core (2).

3. The universal positioning press-fitting die for inner winding stator according to claim 2, characterized in that: The outgoing wires (5) of the stator winding core (2) are led out from the outgoing wire slots (1093) of the upper positioning mold (109).

4. The universal positioning press-fitting die for inner winding stator according to claim 1, characterized in that: The lower workpiece comprises a casing (3).

5. The universal positioning press-fitting die for inner winding stator according to claim 1, characterized in that: The bottom plate (101) is provided with a plurality of screw holes I (1013); The screw holes I (1013) of the base plate (101) are fixed on the workbench by installing screws b (108).

6. The universal positioning press-fitting die for inner winding stator according to claim 1, characterized in that: A plurality of screw holes II (1014) are provided on the surface of the bottom plate (101); The positioning pressing die also includes a handle (106); The handle (106) is mounted on the screw hole II (1014) of the base plate (101) by means of mounting screws a (107).

7. The universal positioning press-fitting die for inner winding stator according to claim 1, characterized in that: The upper positioning die (109) is provided with a stopper for positioning the upper workpiece.

8. The universal positioning press-fitting die for inner winding stator according to claim 1, characterized in that: The upper positioning die (109) and the lower positioning die (110) are changed according to the actual requirements of press-fitting workpieces.

9. A method for press-fitting a workpiece using the positioning press-fitting die according to any one of claims 1 to 8, characterized in that: The following steps are involved: 1) Fix the base plate on the workbench and install the handle on the base plate; 2) Install the positioning block into the bottom of the through hole II of the main spindle and weld it firmly; 3) Install the inner positioning section of the secondary spindle into the spring, and install the spring into the through hole II of the main spindle with the spring facing downward; 4) Place the baffle of the main spindle in the through groove of the bottom plate and horizontally insert it into the through hole I of the bottom plate for fixing; 5) Pass the lower positioning die through the secondary mandrel and the main mandrel in sequence and fix it on the bottom plate; 6) Load the lower workpiece so that the bottom of the lower workpiece is installed on the positioning groove of the lower positioning mold; 7) Load the upper workpiece so that the bottom of the upper workpiece is connected to the top of the lower workpiece; 8) Pass the upper positioning die through the secondary mandrel and assemble it on the upper workpiece, with the lower end of the upper positioning die abutting against the upper workpiece; 9) Adjust the parameters of the pressure equipment, start the pressure equipment, and the auxiliary mandrel, the upper positioning die and the upper workpiece move downward synchronously to complete the workpiece press fitting.

10. A universal positioning and pressing method for inner winding stator, characterized in that: The parameters of the pressure equipment include pressing depth and pressure magnitude.

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