Automatic extrusion bidirectional bending tool for iron core buckle strip installation

Abstract

The utility model discloses an automatic extruding and bidirectional bending tool for installing an iron core buckle strip. Comprising a workbench arranged on the lower portion of a rack, an iron core positioning device arranged on the workbench, a cross beam plate arranged on the top of the rack, a plurality of stand columns arranged between the workbench and the cross beam plate, and an annular lifting table arranged between the workbench and the cross beam plate and movably arranged on the stand columns in the vertical direction. The roller mounting seats are distributed on the annular lifting table in the circumferential direction of the annular lifting table, and the extrusion rollers are arranged on the roller mounting seats and located in an inner hole of the annular lifting table; the buckling strip lower end bending device is used for bending the lower end part of the buckling strip and enabling the lower end part of the buckling strip to be attached to the lower end face of the iron core, and the buckling strip upper end bending device is used for bending the upper end part of the buckling strip and enabling the upper end part of the buckling strip to be attached to the upper end face of the iron core. According to the utility model, the installation efficiency and quality of the iron core buckle strip are improved, and the manufacturing cost of the tool for installing the iron core buckle strip is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor iron core manufacturing process equipment technical field, concretely relates to a kind of automatic extrusion two-way bending tool for iron core clamping strip installation. BACKGROUND

[0002] The stator core is the core component of motor, which is made by stacking a plurality of core punching sheets. The manufacturing process of typical stator core is as follows: first, silicon steel sheet is punched into core punching sheet, then the core punching sheet is stacked, and the assembly of stator core is formed after welding.

[0003] There are various structures for stacking and fixing the core punching sheet of stator core. For example, it is fixed by welding or clamping structure. There is also a special structure for stacking and fixing the core punching sheet of stator core (as shown in Figure 4 After stacking the core punching sheet, a plurality of vertical dovetail grooves are formed on the outer cylinder of the core, and the core is fixed by inserting the iron core clamping strip (also known as stator clamping sheet) into the dovetail groove. The two ends of the iron core clamping strip are bent to form the limiting fixing of the two end faces of the core. The above-mentioned iron core clamping strip is straight strip shape and its cross section is arc-shaped (arc-shaped bow shape). The cross section of the iron core clamping strip is made into arc shape to facilitate the insertion of the iron core clamping strip into the dovetail groove, but there is still a certain gap between the iron core clamping strip and the dovetail groove after the insertion of the iron core clamping strip into the dovetail groove. The cooperation between them is not tight, so the iron core clamping strip needs to be knocked by the operator using a hammer to make it plastic deformation after being inserted into the dovetail groove, so as to realize the tight cooperation between the iron core clamping strip and the dovetail groove. After the tight cooperation between the iron core clamping strip and the dovetail groove is formed, the two ends of the iron core clamping strip need to be bent with a hammer to form 90 degree bending to limit the axial loosening of the iron core clamping strip.

[0004] The installation of the above-mentioned iron core clamping strip is manual work, which has the disadvantage of low production efficiency. In order to improve the production efficiency, the existing technology has developed an improved installation method of iron core clamping strip, which is to pre-bend one end of the iron core clamping strip into a right angle, then insert the iron core clamping strip into the dovetail groove of the core, and then use a special extrusion tool to extrude the iron core clamping strip in the dovetail groove of the core up and down. After extrusion, the other end of the iron core clamping strip which is not bent is bent by 90 degrees. However, this method still has some deficiencies, which are as follows: first, one end of the iron core clamping strip needs to be pre-bent, and pre-bending requires a special bending tool, which is expensive and increases the total time of iron core clamping strip installation; second, the up and down extrusion deformation of the iron core clamping strip in the dovetail groove will also cause certain deformation of the pre-bent part, thereby affecting the contact quality between the pre-bent end and the end face of the core.

[0005] Therefore, it is necessary to improve the existing iron core clamping strip installation technology to solve the above problems. Utility model content

[0006] In order to solve the above problems, the utility model provides a kind of automatic extrusion bidirectional bending tool for iron core clamping strip installation, to improve the efficiency and quality of iron core clamping strip installation, reduce the tool manufacturing cost of iron core clamping strip installation.Specific technical solutions are as follows:

[0007] A kind of automatic extrusion bidirectional bending tool for iron core clamping strip installation, including rack, workbench being arranged in the lower part of the rack, iron core positioning device being arranged on the workbench for installation and positioning iron core, crossbeam plate being arranged in the top of the rack, several numbers of stand being arranged between the workbench and the crossbeam plate, annular lifting platform being arranged between the workbench and the crossbeam plate and being arranged on the stand in up-down direction, roller mounting seat being arranged on the annular lifting platform and being arranged on the annular lifting platform along the circumferential distribution, extrusion roller for extruding clamping strip in iron core dovetail groove being arranged on the roller mounting seat and being located at the inner hole of the annular lifting platform;It is also provided with clamping strip lower end bender for bending the lower end portion of clamping strip and abutting on the lower end surface of iron core, and clamping strip upper end bender for bending the upper end portion of clamping strip and abutting on the upper end surface of iron core.

[0008] In the utility model, the crossbeam plate is provided with several numbers of lifting oil cylinder, and the lower end of the piston rod of the lifting oil cylinder is fixedly connected with the annular lifting platform.

[0009] Preferably, linear bearing is arranged on the annular lifting platform, and the annular lifting platform is movably arranged on the stand in up-down direction through the linear bearing.

[0010] As a preferred scheme of the clamping strip lower end bender in the utility model, the clamping strip lower end bender includes lower swing arm being rotatably arranged at the lower part of the iron core positioning device and being upwardly extended, tension spring being arranged on the iron core positioning device for pulling the lower swing arm to the outside of the iron core positioning device, limiting stopper being arranged on the iron core positioning device for limiting the swing angle of the lower swing arm to the outside, positioning step being arranged on the upper inner side of the lower swing arm for positioning the lower end surface of clamping strip, and guide surface being arranged on the upper outer side of the lower swing arm for bearing the pressure of the extrusion roller to push the lower swing arm to swing to the inner side, so that the lower end portion of the clamping strip is bent.

[0011] Among them, the number of the lower swing arm is several and is arranged at intervals along the circumferential direction of the iron core positioning device, and the outer side of the iron core positioning device is provided with several vertical grooves in up-down direction, each lower swing arm is movably arranged in the corresponding vertical groove and is rotatably arranged on the iron core positioning device through the hinge shaft.

[0012] As a further improvement of the lower end of the buckle strip bender, a through hole is arranged on the lower swing arm at the positioning step in the up-down direction, and a proximity switch is arranged in the through hole at the end face of the positioning step to detect whether the buckle strip is installed in place in the axial direction.

[0013] As a preferred scheme of the buckle strip upper end bender in the utility model, the buckle strip upper end bender comprises a servo cylinder fixed on the beam plate, a lifting seat arranged at a position below the beam plate and fixedly connected with the lower end part of the telescopic rod of the servo cylinder, an upper swing arm rotatably arranged on the lifting seat through a hinge shaft and arranged in a downward extending mode, a tension spring arranged on the lifting seat and used for pulling the upper swing arm to the outside of the lifting seat, a limiting stopper arranged on the lifting seat and used for limiting the swing angle of the upper swing arm to the outside, and a guide surface arranged at the lower outside of the upper swing arm and used for bearing the pressure of the extrusion roller to push the upper swing arm to swing to the inside so as to realize the upper end part bending of the buckle strip.

[0014] The guide surfaces on the lower swing arm and the upper swing arm are cam control surfaces, and after the transverse component force of the extrusion roller acts, the lower swing arm and the upper swing arm swing to the inside, thereby pushing the end part of the iron core buckle strip to form a 90-degree bending.

[0015] In order to enhance the stability and reliability of the up-down movement of the lifting seat, a further improvement scheme is that a plurality of guide rods are vertically arranged at the upper end of the lifting seat, a plurality of guide holes are correspondingly arranged on the beam plate, and the guide rods are arranged on the guide holes of the beam plate in the up-down direction.

[0016] The number of the upper swing arms is a plurality and they are arranged at intervals along the circumference of the lifting seat, a plurality of vertical grooves are formed in the outside of the lifting seat in the up-down direction, and each upper swing arm is movably arranged in the corresponding vertical groove and rotatably arranged on the lifting seat through the hinge shaft.

[0017] As a further improvement of the buckle strip upper end bender, an iron core pressure shaper is further arranged on the buckle strip upper end bender and used for axially pressing and shaping the iron core when the buckle strip is bent, and the iron core pressure shaper is a pressure shaping sleeve arranged at the lower end of the lifting seat.

[0018] Preferably, the height position of the lower end face of the pressure shaping sleeve is lower than the height position of the lowermost end of the upper swing arm, thereby forming a height difference, and the size of the height difference is equal to or slightly greater than the thickness size of the buckle strip (the size can be determined according to the maximum thickness of the iron core buckle strip according to the thickness tolerance of the iron core buckle strip).

[0019] The iron core positioning device is provided with a positioning core shaft for positioning the inner hole of the iron core, the lower end of the lifting seat is provided with a first laser ranging sensor for detecting the height position size of the upper end surface of the positioning core shaft, the pressing and shaping sleeve is provided with a detection through hole in the up-down direction, and the upper end hole of the detection through hole is provided with a second laser ranging sensor for detecting the height position size of the upper end surface of the iron core.

[0020] The first laser ranging sensor is used for the control system to perceive the height position of the lifting seat relative to the iron core positioning device.

[0021] The side surface of the positioning core shaft is provided with a positioning key for realizing the circumferential positioning of the iron core.

[0022] In order to optimize the axial pressing and shaping force of the iron core clamping strip on the iron core during installation, a pressure sensor is arranged between the lower end of the telescopic rod of the servo cylinder and the lifting seat.

[0023] As a further improvement of the utility model, the lower inner side of the upper swing arm is provided with a avoiding step, the upper swing arm is provided with a thimble mounting hole in the up-down direction, the thimble mounting hole is provided with a thimble, the thimble mounting hole is provided with a pressing spring for pressing the thimble at the upper end position of the thimble, the upper end of the thimble mounting hole is provided with an adjusting screw plug for pressing the upper end of the pressing spring through thread cooperation connection, and the lower end of the thimble exposes to the avoiding step through the thimble mounting hole and is opposite to the clamping strip below.

[0024] Preferably, the thimble mounting hole is a stepped hole, the thimble is arranged in the lower small hole of the stepped hole and moves in the up-down direction, the pressing spring and the adjusting screw plug are arranged in the upper expansion hole of the stepped hole, the upper end position of the thimble is provided with a limiting flange in the upper expansion hole, and the lower end of the pressing spring presses the limiting flange.

[0025] In the utility model, the upper swing arm and the lower swing arm are made of high-speed steel material with good wear resistance.

[0026] In the utility model, the lifting oil cylinder, the servo cylinder, the proximity switch, the first laser ranging sensor, the second laser ranging sensor and the pressure sensor are connected with the control system respectively.

[0027] The operation steps of installing the iron core clamping strip by using the automatic extrusion bidirectional bending tool in the utility model are as follows:

[0028] (1) preparation: the operator presses the reset key of the control system, the control system controls the reset of the lifting oil cylinder and the servo cylinder, the annular lifting platform and the lifting seat are lifted to the highest position to leave the operation space for installing the clamping strip, the operator inputs the height parameter of the iron core into the control system;

[0029] (2) iron core installation: the iron core punching piece is placed on the positioning core shaft of the iron core positioning device; during the placing process of the iron core punching piece, the control system detects the total height of the iron core in real time through the second laser ranging sensor and displays it on the display, after all the iron core punching pieces are placed in position, until the iron core with the predetermined height is formed;

[0030] (3) clamping strip installation: the operator inserts the clamping strip into the dovetail groove of the iron core;

[0031] (4) clamping strip extrusion: the operator presses the extrusion bending operation key of the control system, the control system drives the annular lifting platform to move downward through the lifting oil cylinder, when the annular lifting platform moves downward, the extrusion roller on it extrudes the clamping strip in the dovetail groove of the iron core, the clamping strip and the dovetail groove form a close contact through the extrusion deformation, so that the fixation of the clamping strip in the dovetail groove is realized;

[0032] (5) clamping strip two-end bending: the annular lifting platform continues to move downward, so that the extrusion roller contacts the guide surface outside the lower swing arm, when the extrusion roller moves downward, the lower swing arm is swung to the inside direction through the guide surface outside the lower swing arm, so that the lower end part of the clamping strip is bent into a right angle and clings to the lower end surface of the iron core; then, the control system drives the annular lifting platform to move upward through the lifting oil cylinder, at the same time, the control system also drives the lifting seat to move downward through the servo cylinder, until the pressure shaping sleeve at the lower end of the lifting seat presses the upper end surface of the iron core, the control system controls the pressure on the iron core to the set value through the pressure sensor; then, the extrusion roller moving upward pushes the upper swing arm to swing to the inside direction through the guide surface outside the upper swing arm, so that the upper end part of the clamping strip is bent into a right angle and clings to the upper end surface of the iron core.

[0033] Preferably, before the step (4), the control system judges whether the installation of the buckle strip is in place through the proximity switch arranged on the lower swing arm, and when the lower end of the buckle strip does not contact the end face of the positioning step of the lower swing arm, the control system further drives the lifting oil cylinder and the servo cylinder to move the annular lifting platform and the lifting seat downward by a distance (at this time, the extrusion roller on the annular lifting platform is located close to the upper end of the buckle strip but does not contact the buckle strip), so that the ejector pin on the upper swing arm contacts the upper end of the buckle strip, and the buckle strip is pressed downward to contact the end face of the positioning step of the lower swing arm. After being in place, the control system drives the lifting oil cylinder and the servo cylinder to move the annular lifting platform and the lifting seat upward to reset to the original position.

[0034] If an abnormal situation occurs that the ejector pin cannot press the buckle strip downward to be in place, the control system sends an alarm information to remind the relevant operator to handle.

[0035] Preferably, during the step (5), the control system continues to shape and press the iron core for a pre-set pressure maintaining time, so that the adjacent iron core punching sheets are in full contact; and during the pressure maintaining time, the control system drives the annular lifting platform to move up and down several times through the lifting oil cylinder, so as to drive the extrusion roller to extrude the buckle strip in the dovetail groove of the iron core up and down, thereby realizing the addition of the position between the buckle strip and the dovetail groove of the iron core, and further improving the quality of the installation and positioning of the buckle strip.

[0036] The utility model discloses the following beneficial effects:

[0037] Firstly, the automatic extrusion bidirectional bending tool for iron core buckle strip installation realizes the extrusion deformation positioning of the iron core buckle strip in the dovetail groove of the iron core and the bidirectional two-end bending of the iron core buckle strip, thereby overcoming the drawbacks that the iron core buckle strip needs to be pre-bent at one end in the prior art, improving the efficiency and quality of the installation of the iron core buckle strip, and reducing the tool manufacturing cost of the installation of the iron core buckle strip.

[0038] Secondly, the automatic extrusion bidirectional bending tool for iron core buckle strip installation is provided with the lower swing arm with a guide surface on the buckle strip lower end bender and the upper swing arm with a guide surface on the buckle strip upper end bender, so that the extrusion roller can bend the two ends of the buckle strip while extruding the buckle strip, thereby not needing to apply a driving force to the two-end bending of the buckle strip, and greatly simplifying the structure of the automatic extrusion bidirectional bending tool.

[0039] Third, the utility model discloses an automatic extrusion bidirectional bending tool for iron core clamping strip installation is provided with the iron core pressing shaper for the axial pressure shaping of iron core when the clamping strip is bent on the upper end bending ware of the clamping strip, can guarantee the compactness of the contact between adjacent iron core punching sheet, thereby improving the iron core quality after the installation of iron core clamping strip.

[0040] Fourth, the utility model discloses an automatic extrusion bidirectional bending tool for iron core clamping strip installation is provided with the clamping strip placement online monitor on the lower end bending ware of the clamping strip, and is provided with the clamping strip placement correction remedier on the lower end bending ware of the clamping strip, the clamping strip placement online monitor includes the proximity switch at the positioning step end face of lower swing arm, can timely detect whether the situation of not in position appears when the operator places the clamping strip, the clamping strip placement correction remedier is in the situation of not in position of clamping strip placement, through the servo electric jar driving lift seat downward movement, so that the thimble on the upper swing arm carries out the elastic pressure correction to the clamping strip, ensures the placement of clamping strip in position, thereby further improve the adaptability and reliability of automatic extrusion bidirectional bending tool.

[0041] Fifth, the utility model discloses an automatic extrusion bidirectional bending tool for iron core clamping strip installation, and the lift seat is provided with first laser ranging sensor and second laser ranging sensor, can monitor whether the number of the iron core punching sheet (corresponding the height of iron core) placed by the operator is in position on line, thereby effectively avoiding the mistake of the operator to place more or less iron core punching sheet, further improve the adaptability and reliability of automatic extrusion bidirectional bending tool. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 It is the structure schematic diagram of an automatic extrusion bidirectional bending tool for iron core clamping strip installation of the utility model,

[0043] Figure 2 It is Figure 1 the partial enlarged view of the part of the lower end bending ware of clamping strip and the upper end bending ware of clamping strip in

[0044] Figure 3 It is Figure 2 the partial enlarged view of

[0045] Figure 4 It is the schematic diagram of the iron core of installing the clamping strip.

[0046] In the figure: 1, rack, 2, workbench, 3, core positioning device, 4, cross beam plate, 5, column, 6, ring-shaped lifting platform, 7, roller mounting seat, 8, core, 9, buckle strip, 10, extrusion roller, 11, buckle strip lower end bender, 12, buckle strip upper end bender, 13, lifting oil cylinder, 14, linear bearing, 15, hinge shaft, 16, lower swing arm, 17, tension spring, 18, limit stop, 19, positioning step, 20, guide surface, 21, vertical groove body, 22, through hole, 23, proximity switch, 24, servo cylinder, 25, lifting seat, 26, pressure sensor, 27, upper swing arm, 28, guide rod, 29, pressure shaping sleeve, 30, positioning mandrel, 31, first laser distance measuring sensor, 32, detection through hole, 33, second laser distance measuring sensor, 34, avoidance step, 35, thimble mounting hole, 36, thimble, 37, pressure spring, 38, adjusting screw plug, 39, limit flange, 40, core punching sheet, 41, dovetail groove, 42, buckle strip bending part. DETAILED DESCRIPTION

[0047] The specific embodiments of the utility model will be further described below in combination with the drawings and examples. The following examples are only used to more clearly illustrate the technical scheme of the utility model, and cannot limit the protection scope of the utility model.

[0048] Example 1:

[0049] As Figures 1 to 4 shown is an embodiment of the automatic extrusion bidirectional bending tool for core buckle strip installation of the utility model, comprising a rack 1, a workbench 2 arranged at the lower part of the rack 1, a core positioning device 3 arranged on the workbench 2 for installing and positioning a core 8, a cross beam plate 4 arranged at the top of the rack 1, a plurality of columns 5 arranged between the workbench 2 and the cross beam plate 4, a ring-shaped lifting platform 6 arranged between the workbench 2 and the cross beam plate 4 and moving along the up-down direction and arranged on the columns 5, roller mounting seats 7 arranged on the ring-shaped lifting platform 6 and distributed along the circumference of the ring-shaped lifting platform 6, extrusion rollers 10 arranged on the roller mounting seats 7 and located at the inner hole of the ring-shaped lifting platform 6 for extruding the buckle strip 9 in the dovetail groove 41 of the core 8; further provided are a buckle strip lower end bender 11 for bending the lower end part of the buckle strip 9 and abutting against the lower end face of the core 8, and a buckle strip upper end bender 12 for bending the upper end part of the buckle strip 9 and abutting against the upper end face of the core 8.

[0050] In the embodiment, a plurality of lifting oil cylinders 13 are arranged on the cross beam plate 4, and the lower end of the piston rod of the lifting oil cylinder 13 is fixedly connected with the ring-shaped lifting platform 6.

[0051] Preferably, a linear bearing 14 is arranged on the ring-shaped lifting platform 6, and the ring-shaped lifting platform 6 is arranged on the column 15 and moves up and down through the linear bearing 14.

[0052] As a preferred solution of the lower end bending device 11 of the clamping strip, the lower end bending device 11 comprises a lower swing arm 16 arranged on the lower part of the core positioning device 3 and extending upward through a hinge shaft 15, a tension spring 17 arranged on the core positioning device 3 and used to pull the lower swing arm 16 outward, a limiting block 18 arranged on the core positioning device 3 and used to limit the swing angle of the lower swing arm 16, a positioning step 19 arranged on the upper inner part of the lower swing arm 16 and used to position the lower end face of the clamping strip 9, and a guide surface 20 arranged on the upper outer part of the lower swing arm 16 and used to bear the pressure of the extrusion roller 10 to push the lower swing arm 16 to swing inward, thereby realizing the partial bending of the lower end of the clamping strip 9.

[0053] In the embodiment, a plurality of lower swing arms 16 are arranged on the core positioning device 3 and spaced along the circumference of the core positioning device 3. A plurality of vertical grooves 21 are arranged on the outer part of the core positioning device 3 along the vertical direction. Each lower swing arm 16 is arranged in a corresponding vertical groove 21 and rotates on the core positioning device 3 through the hinge shaft 15.

[0054] As a further improvement of the lower end bending device 11, a through hole 22 is arranged on the lower swing arm 16 along the vertical direction at the position of the positioning step 19. A proximity switch 23 is arranged in the through hole 22 and used to detect whether the clamping strip 9 is installed in place along the axial direction.

[0055] As a preferred solution of the upper end bending device 12 of the clamping strip, the upper end bending device 12 comprises a servo cylinder 24 fixed on the cross beam plate 4, a lifting seat 25 arranged below the cross beam plate 4 and fixedly connected with the lower end of the telescopic rod of the servo cylinder 24, an upper swing arm 27 arranged on the lifting seat 25 and extending downward through a hinge shaft 15, a tension spring 17 arranged on the lifting seat 25 and used to pull the upper swing arm 27 outward, a limiting block 18 arranged on the lifting seat 25 and used to limit the swing angle of the upper swing arm 27, and a guide surface 20 arranged on the lower outer part of the upper swing arm 27 and used to bear the pressure of the extrusion roller 10 to push the upper swing arm 27 to swing inward, thereby realizing the partial bending of the upper end of the clamping strip 9.

[0056] The guide surface 20 on the lower swing arm 16 and the upper swing arm 27 is a cam control surface, which is caused to swing inwards by the transverse force of the pinch roller 10, so as to push the end of the core clamping strip 9 to form a 90-degree bend.

[0057] In order to enhance the stability and reliability of the up-and-down movement of the lifting seat 25, a further improvement is that a plurality of guide rods 28 are arranged on the upper end of the lifting seat 25, and a plurality of guide holes are arranged on the cross beam plate 4, and the guide rods 28 are arranged to move up and down in the guide holes of the cross beam plate 4.

[0058] The number of the upper swing arms 27 is several and they are arranged at intervals along the circumference of the lifting seat 25, and a plurality of vertical grooves 21 are arranged on the outer side of the lifting seat 25 along the up-and-down direction, and each of the upper swing arms 27 is arranged to move in the corresponding vertical groove 21 and is arranged to rotate on the lifting seat 25 through the hinge shaft 15.

[0059] As a further improvement of the upper end bending device of the clamping strip, an iron core pressing shaper is arranged on the upper end bending device 12 of the clamping strip 9, which is used to press and shape the iron core 8 in the axial direction when the clamping strip 9 is bent, and the iron core pressing shaper is a pressing shaper sleeve 29 arranged on the lower end of the lifting seat 25.

[0060] Preferably, the height position of the lower end surface of the pressing shaper sleeve 29 is lower than the height position of the lowermost end of the upper swing arm 27, so as to form a height difference, and the size of the height difference is equal to or slightly greater than the thickness of the clamping strip 9 (specifically, it can be determined according to the thickness tolerance of the iron core clamping strip 9, and the maximum thickness of the iron core clamping strip 9 is used for determination).

[0061] In this embodiment, the iron core positioning device 3 is provided with a positioning core shaft 30 for positioning the inner hole of the iron core 8, the lower end of the lifting seat 25 is provided with a first laser distance sensor 31 for detecting the height position size of the upper end surface of the positioning core shaft 30, and the pressing shaper sleeve 29 is provided with a detection through hole 32 in the up-and-down direction, and the upper end hole of the detection through hole 32 is provided with a second laser distance sensor 33 for detecting the height position size of the upper end surface of the iron core 8.

[0062] The first laser distance sensor 31 is used for the control system to perceive the height position of the lifting seat 25 relative to the iron core positioning device 3; when the iron core punching sheet 40 of the iron core 8 is not installed on the iron core positioning device 3, the second laser distance sensor 33 is used for the control system to perceive the height position of the lower positioning plane of the iron core positioning device 3, and when the iron core punching sheet 40 of the iron core 8 is installed on the iron core positioning device 3, the second laser distance sensor 33 is used for the control system to perceive the height position of the uppermost end surface of the uppermost iron core punching sheet 40 on the iron core positioning device 3.

[0063] In this embodiment, the side surface of the positioning mandrel 30 is provided with a positioning key (not shown in the figure) for realizing the circumferential positioning of the core.

[0064] In order to optimize the axial pressing and shaping force of the core clamping strip 9 during installation, a pressure sensor 26 is arranged between the lower end of the extension rod of the servo cylinder 24 and the lifting seat 25.

[0065] As a further improvement of this embodiment, the lower inner side of the upper swing arm 27 is provided with a clearance step 34, the upper swing arm 27 is provided with a thimble mounting hole 35 in the up-down direction, a thimble 36 is arranged in the thimble mounting hole 35, a top pressure spring 37 is arranged in the thimble mounting hole 35 at the upper end position of the thimble 36, the upper end of the thimble mounting hole 35 is threadedly connected with an adjusting screw plug 38 which presses the upper end of the top pressure spring 37, and the lower end of the thimble 36 is exposed to the clearance step 34 and is opposite to the clamping strip 9 below.

[0066] Preferably, the thimble mounting hole 35 is a stepped hole, the thimble 36 is arranged in the lower small hole of the stepped hole in the up-down direction, the top pressure spring 37 and the adjusting screw plug 38 are arranged in the upper expanded hole of the stepped hole, the upper end position of the thimble 36 is provided with a limiting flange 39 arranged in the upper expanded hole, and the lower end of the top pressure spring 37 abuts against the limiting flange 39.

[0067] In this embodiment, the upper swing arm 27 and the lower swing arm 16 are made of high-speed steel material with good wear resistance.

[0068] In this embodiment, the lifting oil cylinder 13, the servo cylinder 24, the proximity switch 23, the first laser distance measuring sensor 31, the second laser distance measuring sensor 33 and the pressure sensor 26 are respectively connected to the control system.

[0069] In this embodiment, the automatic extrusion bidirectional bending tool is used for the operation steps of the core clamping strip installation as follows:

[0070] (1) Preparation: the operator presses the reset key of the control system, the control system controls the lifting oil cylinder 13 and the servo cylinder 24 to reset, so that the annular lifting platform 6 and the lifting seat 25 are lifted to the highest position to leave the operation space for the installation of the clamping strip 9; the operator inputs the height parameter of the core 8 into the control system;

[0071] (2) Core installation: The core punching sheets 40 are placed on the positioning mandrel 30 of the core positioning device 3; during the placement of the core punching sheets 40, the control system detects the total height of the core 8 in real time through the second laser ranging sensor 33 and displays it on the display in real time, and waits until all the core punching sheets 40 are placed in place until the core 8 of the predetermined height is formed;

[0072] (3) Buckle bar installation: The operator inserts the buckle bar 9 into the dovetail groove 41 of the iron core 8;

[0073] (4) Buckle strip extrusion: The operator presses the extrusion bending operation key of the control system, and the control system drives the annular lifting platform 6 to move downward through the lifting cylinder 13. When the annular lifting platform 6 moves downward, the extrusion roller 10 on it squeezes the buckle strip 9 in the dovetail groove 41 of the iron core 8. Through extrusion deformation, the buckle strip 9 forms a close contact with the dovetail groove 41, thereby achieving the fixation of the buckle strip 9 in the dovetail groove 41;

[0074] (5) Bending the two ends of the buckle strip: the annular lifting platform 6 continues to move downward, so that the extrusion roller 10 contacts the guide surface 20 on the outer side of the lower swing arm 16. When the extrusion roller 10 moves downward, it pushes the lower swing arm 16 to swing inward through the guide surface 20 on the outer side of the lower swing arm 16, thereby bending the lower end of the buckle strip 9 into a right angle and abutting against the lower end surface of the iron core 8; then, the control system drives the annular lifting platform 6 to move upward through the lifting cylinder 13. At the same time, the control system also drives the lifting seat 25 to move downward through the servo electric cylinder 24 until the pressure shaping sleeve 29 at the lower end of the lifting seat 25 presses the upper end surface of the iron core 8. The control system controls the pressure applied to the iron core 8 to a set value through the pressure sensor 26; then, the upward-moving extrusion roller 10 pushes the upper swing arm 27 to swing inward through the guide surface 20 on the outer side of the upper swing arm 27, thereby bending the upper end of the buckle strip 9 into a right angle and abutting against the upper end surface of the iron core 8.

[0075] Preferably, before the (4) buckle strip is squeezed, the control system determines whether the buckle strip 9 is installed in place through the proximity switch 23 provided on the lower swing arm 16. When the lower end of the buckle strip 9 does not contact the end face of the positioning step 19 of the lower swing arm 16, the control system also drives the lifting cylinder 13 and the servo electric cylinder 24 to move, so that the annular lifting platform 6 and the lifting seat 25 each move down a distance (at this time, the squeezing roller 10 on the annular lifting platform 6 is just located near the upper end of the buckle strip 9 but does not contact the buckle strip 9), so that the ejector pin 36 on the upper swing arm 27 contacts the upper end of the buckle strip 9 and presses the buckle strip 9 down until its lower end contacts the end face of the positioning step 19 of the lower swing arm 16. After it is in place, the control system drives the lifting cylinder 13 and the servo electric cylinder 24 to move, so that the annular lifting platform 6 and the lifting seat 25 rise and return to their original positions.

[0076] If the abnormal situation that the ejector pin 36 cannot press the clamping strip 9 into place occurs, the control system sends an alarm message to remind the relevant operating personnel to handle it.

[0077] Preferably, during the folding process of the two ends of the clamping strip in step (5), the control system continues to shape and press the iron core 8 for a pre-set pressure maintaining time, so that the upper and lower adjacent iron core punching sheets 40 are in full contact; and during the continued time period of shaping and pressing, the control system drives the annular lifting platform 6 to move up and down reciprocatingly for several times through the lifting oil cylinder 13, so as to drive the extrusion roller 10 to extrude the clamping strip 9 in the dovetail groove 41 of the iron core 8 up and down reciprocatingly, thereby realizing the clamping strip 9 and the iron core 8 dovetail groove 41 between the fixed position, so as to further improve the quality of the clamping strip installation and positioning.

[0078] The above only describes the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. An automatic extrusion and bidirectional bending tool for installing core buckle strips, characterized in that: The cam is provided with a plurality of support members, and the support members are provided with a plurality of support members, and the support members are provided with a plurality of support members, and the support members are provided with a plurality of support members, and the support members are provided with a plurality of support members, and the support members are provided with a plurality of support members, and the support members are provided with a plurality of support members, and the support members are provided with a plurality of support members, and the support members are provided with a plurality of support members, and the support members are provided with a plurality of support members, and the support members are provided with a plurality of support members, and the support members are provided with a plurality of support members, and the support members are provided with a plurality of support members, and the support members are provided with a plurality of support members, and the support members are provided with a plurality of support members, and the support members are provided with a plurality of support members, and the support members are provided with a plurality of support members, and the support members are provided with a plurality of support members, and the support members are provided with a plurality of support members, and the support members are provided with a plurality of support members, 2. The automatic extrusion bidirectional bending tool for installing core buckle strips according to claim 1, characterized in that: A number of lifting cylinders are provided on the crossbeam plate, and the lower ends of the piston rods of the lifting cylinders are fixedly connected to the annular lifting platform.

3. The automatic extrusion bidirectional bending tool for installing core buckle strips according to claim 1, characterized in that: The bender at the lower end of the buckle strip includes a lower swing arm that is arranged at the lower position of the iron core positioning device and extends upward through a hinge shaft, a tension spring arranged on the iron core positioning device for pulling the lower swing arm toward the outside of the iron core positioning device, a limit block arranged on the iron core positioning device for limiting the outward swing angle of the lower swing arm, a positioning step arranged at the upper inner position of the lower swing arm for positioning the lower end face of the buckle strip, and a guide surface arranged at the upper outer position of the lower swing arm for bearing the pressure of the extrusion roller to push the lower swing arm to swing inward to achieve bending of the lower end portion of the buckle strip.

4. The automatic extrusion bidirectional bending tool for installing core buckle strips according to claim 3, characterized in that: There are several lower swing arms and they are arranged at intervals along the circumference of the core positioning device. The outer side of the core positioning device is provided with several vertical slots along the up and down directions. Each lower swing arm is movably arranged in the corresponding vertical slot and is rotatably arranged on the core positioning device through the hinge shaft.

5. The automatic extrusion bidirectional bending tool for installing core buckle strips according to claim 3, characterized in that: A through hole is provided on the lower swing arm at the positioning step along the up-down direction, and a proximity switch is provided at the end surface of the positioning step in the through hole for detecting whether the buckle strip is installed in place in the axial direction.

6. The automatic extrusion bidirectional bending tool for installing core buckle strips according to claim 1, characterized in that: The bender for the upper end of the buckle strip includes a servo electric cylinder fixed on the cross beam plate, a lifting seat arranged below the cross beam plate and fixedly connected to the lower end of the telescopic rod of the servo electric cylinder, an upper swing arm arranged on the lifting seat and extending downward by a hinge shaft, a tension spring arranged on the lifting seat for pulling the upper swing arm toward the outside of the lifting seat, a limit block arranged on the lifting seat for limiting the outward swing angle of the upper swing arm, and a guide surface arranged at the outer side of the lower part of the upper swing arm for bearing the pressure of the extrusion roller to push the upper swing arm to swing inward, thereby realizing the bending of the upper end part of the buckle strip.

7. The automatic extrusion bidirectional bending tool for installing core buckle strips according to claim 6, characterized in that: A number of guide rods are erected upwardly from the upper end of the lifting seat, and a number of guide holes are correspondingly provided on the crossbeam plate. The guide rods are arranged on the guide holes of the crossbeam plate so as to move in the up and down directions.

8. The automatic extrusion bidirectional bending tool for installing core buckle strips according to claim 6, characterized in that: There are a plurality of upper swing arms, which are arranged at intervals along the circumference of the lifting seat. A plurality of vertical slots are opened on the outer side of the lifting seat in the up-down direction. Each upper swing arm is movably arranged in a corresponding vertical slot and is rotatably arranged on the lifting seat through the hinge shaft.

9. The automatic extrusion bidirectional bending tool for installing core buckle strips according to claim 8, characterized in that: The iron core positioning device is provided with a positioning core shaft for positioning the inner hole of the iron core, and the lower end of the lifting seat is provided with a first laser ranging sensor for detecting the height position size of the upper end surface of the positioning core shaft; a pressure sensor is provided between the lower end of the telescopic rod of the servo electric cylinder and the lifting seat.

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