Straightening device and straightening machine

Abstract

The invention discloses a straightening device and a straightening machine, and relates to the technical field of motor manufacturing, the straightening machine comprises a workbench, a positioning plate and a first straightening assembly, the workbench is used for placing an annular workpiece, the positioning plate is arranged on the workbench, the first straightening assembly and the positioning plate are oppositely arranged, and the first straightening assembly is arranged on the workbench. The first straightening assembly comprises at least two abutting parts, the at least two abutting parts are used for being inserted into an area defined by the annular workpiece and used for making the annular workpiece abut against the positioning plate, and at least one abutting part is used for making reciprocating motion in the extending direction of the positioning plate and used for making the annular workpiece abut against the positioning plate. The annular workpiece is unfolded to form a strip-shaped workpiece; according to the invention, the consistency of the strip-shaped stator during unfolding can be improved, and the stator straightening effect is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of motor manufacturing, and in particular to a straightening device and a straightening machine. Background Art

[0002] After the straight stator of a motor is wound and circled, if the circled effect is not good, it needs to be straightened and circled again; or in related technologies, after the straight stator of a motor is reversely bent and circled and wound, it needs to be straightened and sorted, pinned and welded, and then bent and welded to complete the stator production. However, there is no corresponding straightening processing method for the above-mentioned reverse bent circle stator, and it can only be straightened manually. The straightening effect is random and consistency is difficult to guarantee.

[0003] The above content is only used to assist in understanding the technical solution of the invention and does not constitute an admission that the above content is prior art. Summary of the Invention

[0004] The main purpose of the present invention is to provide a straightening device and a straightening machine, which are intended to improve the consistency of the bar stator when it is unfolded and ensure the stator straightening effect.

[0005] To achieve the above object, the straightening machine proposed in the present invention comprises:

[0006] A workbench for placing annular workpieces;

[0007] A positioning plate, provided on the workbench;

[0008] The first straightening component is arranged opposite to the positioning plate. The first straightening component includes at least two pressing members. At least two of the pressing members are used to be inserted into the area enclosed by the annular workpiece and to abut the annular workpiece against the positioning plate. At least one of the pressing members is used to reciprocate along the extension direction of the positioning plate to unfold the annular workpiece into a strip-shaped workpiece.

[0009] In one embodiment, there are two pressing members, and the two pressing members have a first position inserted into the annular workpiece and a second position located at both ends of the strip workpiece. The two pressing members are used to move closer to or away from each other between the first position and the second position to unfold the annular workpiece to form the strip workpiece.

[0010] In one embodiment, the pressing member is configured as a roller, and the roller can roll along the surface of the annular workpiece and / or the strip workpiece.

[0011] In an embodiment, the straightening device further comprises a first straightening driving member, the first straightening driving member being configured to drive the two pressing members to relatively approach or move away from each other along a first direction along which the pressing members extend on the positioning plate; and / or, the first straightening driving member being configured to drive the pressing members to approach or move away from the positioning plate along a second direction intersecting the first direction.

[0012] In an embodiment, the first straightening assembly further comprises a straightening mounting member, the straightening mounting member being configured to elastically connect the pressing members and the first straightening driving member, so that the pressing members are elastically floated relative to the positioning plate.

[0013] In an embodiment, the straightening device further comprises a second straightening assembly, the second straightening assembly comprising a pressing plate oppositely arranged relative to the positioning plate, the pressing plate being configured to move towards the positioning plate so that the strip-shaped workpiece is clamped by the pressing plate and the positioning plate.

[0014] In an embodiment, the second straightening assembly further comprises a plurality of pressing columns, the plurality of pressing columns being arranged at intervals along a length direction of the pressing plate, each of the pressing columns being movably arranged on the pressing plate along a second direction, each of the pressing columns being configured to abut against the strip-shaped workpiece when the strip-shaped workpiece is clamped by the pressing plate and the positioning plate.

[0015] In an embodiment, the straightening device further comprises a second straightening driving member configured to drive the pressing plate to reciprocate along a direction opposite to the positioning plate.

[0016] In an embodiment, the positioning plate is provided with a convex arc surface on a side facing the first straightening assembly.

[0017] In an embodiment, the straightening device further comprises a limiting assembly arranged on a side of the positioning plate, the limiting assembly comprising a movable driving member and a limiting head, the movable driving member being configured to drive the limiting head to move so as to position the ring-shaped workpiece and / or the strip-shaped workpiece between the workbench and the limiting head.

[0018] The present application further provides a straightening machine, comprising:

[0019] The straightening device as described above;

[0020] A feeding device configured to feed the ring-shaped workpiece to the straightening device; and

[0021] A discharging device configured to discharge the strip-shaped workpiece from the straightening device.

[0022] In an embodiment, the straightening machine further comprises a demolding device for separating the mold supporting the annular workpiece from the annular workpiece.

[0023] In an embodiment, the demolding device comprises a placing assembly and a demolding assembly;

[0024] The placing assembly is used for placing the annular workpiece with the mold, and the demolding assembly comprises a first clamping member for clamping the outer circumferential side of the annular workpiece and a pressing demolding head for moving in a third direction towards the placing assembly to eject the mold located in the annular workpiece.

[0025] In an embodiment, the straightening machine further comprises a transfer driving member drivingly connected to the demolding assembly, which is used for driving the demolding assembly to reciprocate between a demolding position opposite to the placing assembly and a straightening position opposite to the workbench.

[0026] In an embodiment, the placing assembly comprises a placing table, a lifting driving member and a positioning seat, the placing table is provided with a through slot for the positioning seat and the mold of the annular workpiece to move, the placing table is used for carrying the annular workpiece, the positioning seat is used for carrying the mold of the annular workpiece, and the lifting driving member is used for driving the positioning seat to reciprocate along a third direction in which the through slot extends, so as to eject the mold after the annular workpiece is demolded.

[0027] The technical scheme of the present application sets the workbench, sets the positioning plate on the workbench, and sets the first straightening assembly opposite to the positioning plate. The annular workpiece is placed on the workbench, the first straightening assembly comprises at least two pressing members, and the at least two pressing members can abut the annular workpiece to the positioning plate when the at least two pressing members are inserted into the annular workpiece, so that the annular workpiece is clamped between the at least two pressing members and the positioning plate, and at least one pressing member can reciprocate along the extension direction of the positioning plate. When the annular workpiece is attached to the inner wall, each part of the annular workpiece is attached to the positioning plate, so that the annular workpiece is expanded to form a strip-shaped workpiece. When the annular workpiece is configured as an annular stator, the annular stator can be conveniently expanded and straightened into a strip-shaped stator. When the positioning plate and the first straightening assembly are limited, the consistency of the strip-shaped stator during expansion can be improved, and the straightening effect of the stator can be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0029] Figure 1 A structural schematic diagram of an embodiment of a stator winding production line provided by the present invention;

[0030] Figure 2 A structural schematic diagram of an embodiment of a straightening machine provided by the present invention;

[0031] Figure 3 A schematic structural diagram of an embodiment of a straightening device provided by the present invention;

[0032] Figure 4 for Figure 3 A local enlarged view at point A;

[0033] Figure 5 A schematic structural diagram of the straightening device provided by the present invention from another angle;

[0034] Figure 6 for Figure 5 A partial enlarged view at point B;

[0035] Figure 7 A structural schematic diagram of the straightening device provided by the present invention from another angle;

[0036] Figure 8 This is a structural schematic diagram of the straightening device provided by the present invention from another angle;

[0037] Figure 9 for Figure 2 A schematic structural diagram of an embodiment of a middle demoulding assembly;

[0038] Figure 10 for Figure 2 A schematic structural diagram of an embodiment of a middle feeding device;

[0039] Figure 11 for Figure 2 A structural diagram of an embodiment of placing components in the figure.

[0040] Description of Figure Numbers:

[0041] 1000. Stator winding production line;

[0042] 100, straightening machine; 200, rounding machine; 300, winding machine; 400, transfer device;

[0043] 10. Straightening device; 11. Workbench; 12. Positioning plate; 121. Convex arc surface; 131. First straightening assembly; 131a. Pressing member; 131b. Straightening mounting member; 132. Second straightening assembly; 132a. Pressing plate; 132b. Pressing column; 14. First straightening driver; 141. First sub-straightening driver; 142. Second sub-straightening driver; 143. Mounting member; 15. Second straightening driver; 151. Connecting rod; 16. Limiting assembly; 161. Limiting head; 162. Movable driver;

[0044] 20. Loading device; 30. Unloading device; 31. Second clamping member; 32. Lifting drive member; 40. Demolding device; 41. Placement assembly; 411. Placement table; 411a. Through slot; 412. Lifting drive member; 413. Positioning seat; 42. Demolding assembly; 421. First clamping member; 422. Pressing demoulding head; 50. Transfer drive member; 60. Frame; 70. Loading conveyor; 80. Unloading conveyor;

[0045] 1a, ring-shaped workpiece; 1b, bar-shaped workpiece; 1c, mold.

[0046] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0048] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0049] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor in the protection scope required by the present application.

[0050] After the motor straight bar stator is wound and coiled, if the coiling effect is not good, it needs to be straightened and coiled again; or in the related art, after the motor straight bar stator is coiled and wound in reverse, it needs to be straightened and arranged, and then pin welding is inserted and coiled and welded, to complete the stator production, and the reverse coiled stator does not have a corresponding straightening processing means, and can only be processed by artificial straightening, and the straightening effect is random, and consistency is difficult to guarantee.

[0051] The above content is only used to assist understanding of the technical solutions of the application, and does not represent the acknowledgement of the above content as prior art.

[0052] The present application provides a straightening device 10.

[0053] Please refer to Figures 3 to 8 In an embodiment of the present application, the straightening device 10 includes a workbench 11, a positioning plate 12 and a first straightening assembly 131, the workbench 11 is used to place the annular workpiece 1a, the positioning plate 12 is arranged on the workbench 11, the first straightening assembly 131 is arranged opposite to the positioning plate 12, the first straightening assembly 131 includes at least two pressing pieces 131a, at least two pressing pieces 131a are used to be inserted into the area enclosed by the annular workpiece 1a, and are used to abut the annular workpiece 1a to the positioning plate 12, at least one pressing piece 131a is used to reciprocate along the extension direction of the positioning plate 12, to expand the annular workpiece 1a to form a strip-shaped workpiece 1b.

[0054] In the present invention, the annular workpiece 1a can be a reverse-bent annular stator, wherein the reverse-bent annular stator can include a reverse-bent annular stator core and multiple windings, the reverse-bent annular stator core can include multiple sub-stator cores, the multiple sub-stator cores are sequentially connected to form a reverse-bent annular stator core, each sub-stator core has a winding portion on the outside, and a connecting portion connecting two adjacent sub-stator cores on the inside, when each winding portion is provided with a winding, a reverse-bent annular stator can be formed, and each winding portion of the annular stator is located on the outer circumference of the annular stator. The bar-shaped workpiece 1b can be a straight bar stator formed by unfolding the reverse-bent annular stator, and the straight bar stator can be bent forward to form an annular stator with the winding portion facing inward and the connecting portion facing outward.

[0055] The straightening device 10 of the present invention can be used as part of a straightening machine 100, which can be used in the production and processing of stators and is responsible for expanding annular stators into straight stators. The straightening machine 100 can be used to expand and straighten reverse-bent annular stators to form straight stators, or it can be used to expand forward-bent annular stators to form straight stators, without specific limitations herein.

[0056] Two pressing members 131a may be provided. When the two pressing members 131a are inserted into the inner cavity of the annular workpiece 1a, the two pressing members 131a press the annular workpiece 1a against the positioning plate 12, clamping the annular workpiece 1a between the pressing members 131a and the positioning plate 12. Then, at least one of the two pressing members 131a reciprocates along the extension direction of the positioning plate 12. When the pressing members 131a are in contact with the inner surface of the annular workpiece 1a, each portion of the annular workpiece 1a can be pressed against the positioning plate 12 under the pressure of the pressing members 131a, so that the annular workpiece 1a is separated along the seam position and unfolded along the positioning plate 12 to form a strip-shaped workpiece 1b. When the pressing members 131a reciprocate along the extension direction of the positioning plate 12, the two pressing members 131a may reciprocate along the extension direction of the positioning plate 12 simultaneously, for example, the two pressing members 131a move toward or away from each other along the extension direction of the positioning plate 12. Alternatively, one of the pressing members 131 a presses the annular workpiece 1 a against the positioning plate 12 , and the other pressing member 131 a reciprocates along the extending direction of the positioning plate 12 , which is not limited here.

[0057] Among them, the pressing member 131a can be electrically driven to move in the direction toward the positioning plate 12 to abut the annular workpiece 1a against the positioning plate 12, and reciprocate along the extension direction of the positioning plate 12 to unfold the annular workpiece 1a to form a strip workpiece 1b, or the pressing member 131a can be hydraulically driven or manually driven to achieve the unfolding of the above-mentioned annular workpiece 1a to the strip workpiece 1b, which is not specifically limited here.

[0058] The technical solution of the present invention is to set a workbench 11, set a positioning plate 12 on the workbench 11, and set a first straightening assembly 131 to be arranged opposite to the positioning plate 12, place the annular workpiece 1a on the workbench 11, set the first straightening assembly 131 to include at least two pressing members 131a, and when the at least two pressing members 131a are inserted into the annular workpiece 1a, the at least two pressing members 131a can press the annular workpiece 1a against the positioning plate 12, and clamp the annular workpiece 1a between the at least two pressing members 131a and the positioning plate 12. The positioning plates 12 are located between the at least one pressing member 131a, and at the same time, at least one pressing member 131a can reciprocate along the extension direction of the positioning plate 12. When the inner wall of the annular workpiece 1a is adhered to the positioning plate 12, each part of the annular workpiece 1a is adhered to the positioning plate 12, so that the annular workpiece 1a is unfolded to form a strip workpiece 1b. When the annular workpiece 1a is configured as an annular stator, it is convenient to unfold and straighten the annular stator into a strip stator. When limited by the positioning plate 12 and the first straightening component 131, the consistency of the strip stator when unfolding can be improved, thereby ensuring the stator straightening effect.

[0059] like Figure 3 、 Figure 4 As shown, in one embodiment, there are two pressing members 131a, and the two pressing members 131a have a first position inserted into the annular workpiece 1a, and a second position located at both ends of the strip workpiece 1b. The two pressing members 131a are used to move closer to or away from each other between the first position and the second position to unfold the annular workpiece 1a to form the strip workpiece 1b.

[0060] It is understood that when two pressure members 131a are provided and the two pressure members 131a can move toward or away from each other, one of the pressure members 131a can be responsible for unfolding the left half of the annular workpiece 1a, while the other pressure member 131a can be responsible for unfolding the right half of the annular workpiece 1a. The two parts of the annular workpiece 1a can be unfolded simultaneously, thereby improving the unfolding efficiency of the annular workpiece 1a. In addition, compared to providing three or more pressure members 131a, the installation cost of the first straightening assembly 131 can be reduced while ensuring the unfolding efficiency of the annular workpiece 1a. Furthermore, when the two pressure members 131a move toward or away from each other, the unfolded bar stator can be reciprocally stretched and straightened, preventing the unfolded bar stator from rebounding due to the release of residual stress, resulting in a certain degree of bending after straightening.

[0061] like Figure 4 As shown, optionally, the pressing member 131a is configured as a roller, and the roller can roll along the surface of the annular workpiece 1a and / or the bar-shaped workpiece 1b.

[0062] It is understood that when the pressure member 131a is configured as a roller that can roll against the surface of the annular workpiece 1a, when the roller is in contact with the surface of the annular workpiece 1a and reciprocates along the extension direction of the positioning plate 12, the contact friction between the roller and the surface of the annular workpiece 1a can be reduced, thereby reducing damage to the surface of the annular workpiece 1a. When the annular workpiece 1a is configured as an annular stator, damage to the iron core and winding of the annular stator can be avoided. Even if the winding is on the inner circumference of the annular stator, when the roller rolls against the side of the stator where the winding is set, relative friction with the winding can be avoided, which may cause damage to the surface of the enameled wire of the winding.

[0063] Optionally, the straightening device 10 further includes a first straightening driver 14, configured to drive the two pressing members 131a to move closer to or farther from each other along a first direction in which the positioning plate 12 extends. The first straightening driver 14 can be configured as two cylinders, each of which drives the two pressing members 131a, or as two servo motor assemblies, each of which drives the two pressing members 131a, without limitation.

[0064] Alternatively, the first straightening driver 14 is configured to drive the pressing member 131a toward or away from the positioning plate 12 in a second direction, where the second direction intersects the first direction. In this case, two first straightening drivers 14 may be provided, each configured to drive the two pressing members 131a toward or away from the positioning plate 12 in the second direction. When the two pressing members 131a are driven toward the positioning plate 12, the pressing members 131a can push the annular workpiece 1a, causing the annular workpiece 1a to be clamped between the pressing members 131a and the positioning plate 12.

[0065] Alternatively, the first straightening drive member 14 can simultaneously realize the above-mentioned driving modes. In this case, Figure 5 、 Figure 7 、 Figure 8As shown, in one embodiment, the first straightening drive member 14 includes a first sub-straightening drive member 141, a second sub-straightening drive member 142 and a mounting member 143. The number of the first sub-straightening drive member 141, the second sub-straightening drive member 142 and the mounting member 143 is set corresponding to the number of the pressing members 131a. The mounting member 143 is used to install the first sub-straightening drive member 141 and the pressing member 131a. The first sub-straightening drive member 141 is driven to connect the pressing member 131a on the mounting member 143, so that the pressing member 131a can move closer to or farther away from the mounting member 143 along the second direction. When the first straightening drive 142 is moved away from the positioning plate 12, the second sub-straightening drive 142 drives the connecting mounting member 143. When two pressing members 131a are provided and two mounting members 143 are provided, two second sub-straightening drive members 142 can be provided. The two second sub-straightening drive members 142 are respectively used to drive the two mounting members 143 to move closer to or away from each other along the first direction, thereby driving the pressing members 131a located on the mounting members 143 to move closer to or away from each other, so that the first straightening drive 14 can simultaneously drive the two pressing members 131a to move relative to each other, and drive the two pressing members 131a to move relative to the positioning plate 12.

[0066] like Figure 4 、 Figure 8 As shown, in one embodiment, the first straightening assembly 131 further includes a straightening mounting member 131b, which elastically connects the pressing member 131a and the first straightening driving member 14 to allow the pressing member 131a to elastically float relative to the positioning plate 12.

[0067] When the pressing member 131a is configured as a roller, the straightening mounting member 131b can be set as a mounting frame for mounting the roller, the mounting frame can be connected to the output end of the first straightening drive member 14, and the mounting frame may include a first section driven and connected to the first straightening drive member 14, and a second section for mounting the roller, the first section and the second section can be linearly movably connected, and the first section and the second section can be elastically connected by an elastic member.

[0068] In this way, when the roller moves along the second direction toward the positioning plate 12 to abut the annular workpiece 1a, a rigid collision between the roller and the annular workpiece 1a can be avoided, which may cause damage to the annular workpiece 1a. When the annular workpiece 1a is configured as an annular stator, elastic buffering can be used to further prevent damage to the stator core and stator winding.

[0069] Moreover, when the pressure member 131a is configured as a roller, when the first straightening drive member 14 drives the roller to roll on the stator surface, not only can the roller reduce the friction with the stator surface, but the straightening mounting member 131b can also allow the roller to have a certain slight floating relative to the stator surface, thereby reducing the rigid impact of the roller on the stator during the rolling process, especially the rigid impact on the weak parts connecting the two adjacent stator cores, thereby avoiding the situation where micro cracks or local fractures are generated on the stator surface due to rolling.

[0070] Optionally, the workbench 11 is further provided with an avoidance groove, in which the two pressing members 131a are movably mounted, and the straightening mounting member 131b is connected to the pressing members 131a from bottom to top. Thus, when the annular workpiece 1a is placed between the two pressing members 131a, a portion of the annular workpiece 1a can be placed on the workbench 11 on one side of the two pressing members 131a, while the other portion of the annular workpiece 1a can be placed on the workbench 11 on the other side. This allows the workbench 11 to avoid the movement of the two pressing members 131a, while preventing the straightening mounting member 131b from interfering with the loading of the annular workpiece 1a and the unloading of the bar-shaped workpiece 1b.

[0071] In addition, in order to ensure the straightening effect of the straightening device 10 on the annular workpiece 1a, a second straightening component 132 can be provided. After the first straightening component 131 expands the annular workpiece 1a into a strip workpiece 1b, the strip workpiece 1b is pressurized. Figure 3 、 Figure 4 、 Figure 5 As shown, in one embodiment, the straightening device 10 also includes a second straightening component 132, and the second straightening component 132 includes a pressure plate 132a arranged opposite to the positioning plate 12, and the pressure plate 132a is used to move toward the positioning plate 12 so that the strip workpiece 1b is clamped by the pressure plate 132a and the positioning plate 12.

[0072] With such an arrangement, after the first straightening component 131 unfolds the annular workpiece 1a into a strip-shaped workpiece 1b, the operating pressure plate 132a can be moved toward the strip-shaped workpiece 1b abutting against the positioning plate 12, pressing on the strip-shaped workpiece 1b, so that the strip-shaped workpiece 1b is clamped between the pressure plate 132a and the positioning plate 12, maintaining pressure on the strip-shaped workpiece 1b to prevent the strip-shaped workpiece 1b from rebounding and shrinking, resulting in poor straightening effect.

[0073] In addition, in order to further improve the straightening effect of the bar workpiece 1b, as Figure 4As shown, in one embodiment, the second straightening assembly 132 further includes a plurality of pressure columns 132b, and the plurality of pressure columns 132b are spaced apart along the length direction of the pressure plate 132a, and each of the pressure columns 132b is movably provided on the pressure plate 132a along the second direction. When the bar workpiece 1b is clamped by the pressure plate 132a and the positioning plate 12, each of the pressure columns 132b is used to abut against the bar workpiece 1b.

[0074] In the above embodiment, a gas rod can be configured for each pressure column 132b, and the gas rod can be arranged on the pressure plate 132a. The pressure column 132b is driven to move along the second direction by the gas rod, or the pressure column 132b can be movably arranged on the pressure plate 132a along the second direction by being threadedly connected to the pressure plate 132a. This is not limited here.

[0075] When the pressure plate 132a cooperates with the positioning plate 12 to clamp the bar-shaped workpiece 1b, each pressure column 132b can independently move along the second direction, abutting against the bar-shaped workpiece 1b, and further maintain pressure on each section of the bar-shaped workpiece 1b, thereby enhancing the pressure-maintaining effect. When the bar-shaped workpiece 1b is configured as a bar-shaped stator, multiple pressure columns 132b can be arranged one-to-one with the multiple iron cores of the bar-shaped stator to maintain pressure on each sub-stator iron core, maintaining the smoothness of the connection between two adjacent sub-stator iron cores while avoiding damage to the weak connection points between the two sub-stator iron cores. Even if some sections of the straight stator are uneven, the multiple pressure columns 132b can be used to adjust them section by section to ensure the smoothness of each section of the straight stator.

[0076] The following describes the driving method of the movement of the pressing plate 132a. Figure 3 、 Figure 5 As shown, in one embodiment, the straightening device 10 further includes a second straightening driving member 15 drivingly connected to the pressing plate 132 a , and the second straightening driving member 15 is used to drive the pressing plate 132 a to reciprocate in a direction opposite to the positioning plate 12 .

[0077] The second straightening driving member 15 can be provided as two, and the two second driving members 15 can be respectively arranged on the two sides of the pressing plate 132a. Each second straightening driving member 15 can be drivingly connected to the pressing plate 132a through a connecting rod 151. The two second straightening driving members 15 can simultaneously drive the pressing plate 132a to reciprocate along the second direction, so that the pressing plate 132a can abut against the strip-shaped workpiece 1b and cooperate with the positioning plate 12 to clamp the strip-shaped workpiece 1b. In this way, the overall movement stroke of the pressing plate 132a is consistent, and each part of the pressing plate 132a can uniformly approach the straight bar stator after preliminary straightening, so as to ensure that each part of the straight bar stator is uniformly contacted and stressed by the pressing plate 132a, prevent the local stress concentration of the contact part between the straight bar stator and the pressing plate 132a, and avoid the occurrence of micro-cracks and local fractures in the secondary straightening process of the stator.

[0078] Alternatively, the pressing plate 132a can be driven in a manual control mode. For example, a lead screw is arranged on each side of the pressing plate 132a, and the pressing plate 132a is threadedly connected to the lead screws on the two sides, respectively. By manually rotating the lead screws, the pressing plate 132a can be driven to move relative to the positioning plate 12 along the second direction.

[0079] Optionally, as shown in Figure 6 , one side of the positioning plate 12 facing the first straightening assembly 131 is provided with a convex arc surface 121.

[0080] It can be understood that when the ring-shaped workpiece 1a is unfolded to form the strip-shaped workpiece 1b by the pressing member 131a, the strip-shaped workpiece 1b will accumulate elastic stress during the unfolding process. When the side of the positioning plate 12 abutting against the strip-shaped workpiece 1b is provided as the convex arc surface 121, the pressing member 131a and the plurality of pressing columns 132b can reversely bend the strip-shaped workpiece 1b. In the case of stress rebound of the strip-shaped workpiece 1b, the reverse bending and the stress rebound can offset each other, so as to make the flatness of the strip-shaped workpiece 1b better.

[0081] As shown in Figure 3 , Figure 4 In an embodiment, the straightening device 10 further includes a limiting assembly 16 located on one side of the positioning plate 12. The limiting assembly 16 includes a movable driving member 162 and a limiting head 161. The movable driving member is used to drive the limiting head 161 to move, so as to position the ring-shaped workpiece 1a and / or the strip-shaped workpiece 1b between the workbench 11 and the limiting head 161.

[0082] In the above embodiment, the limit assembly 16 may further include a movable driving member 162, which drives the connected limit head 161. When the annular workpiece 1a is placed on the workbench 11 and the annular workpiece 1a is against the positioning plate 12, the movable driving member 162 can drive the limit head 161 to move toward the side of the annular workpiece 1a away from the workbench 11, so that the annular workpiece 1a is clamped between the workbench 11 and the limit head 161, which can prevent the annular workpiece 1a from shifting during the unfolding process, resulting in inaccurate unfolding of the annular workpiece 1a.

[0083] Among them, the movable driving member 162 may include a first positioning driving member, a second positioning driving member and a positioning connecting member. The first positioning driving member may be arranged on the side of the positioning plate 12 away from the first straightening component 131. The first positioning driving member drives the second positioning driving member to rotate through the positioning connecting member. The second positioning driving member drives the limit head 161 to move in the vertical direction. When the limit component 16 is in a non-working state, the first positioning driving member can rotate the limit head 161 to the side of the positioning plate 12 away from the first straightening component 131. When the limit component 16 is in a working state, the first positioning driving member can rotate the limit head 161 to directly above the bar workpiece 1b and / or the annular workpiece 1a. The second positioning driving member drives the limit head 161 toward the bar workpiece 1b and / or the annular workpiece 1a, positioning the annular workpiece 1a and / or the bar workpiece 1b between the workbench 11 and the limit head 161, thereby realizing the positioning work of the annular workpiece 1a when it is unfolded.

[0084] See Figure 2 As shown, the present invention further provides a straightening machine 100, which includes a straightening device 10, a loading device 20, and an unloading device 30. The specific structure of the straightening machine 100 is similar to that of the above-mentioned embodiments. Since the straightening machine 100 adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be described in detail here. The loading device 20 is used to load the annular workpiece 1a into the straightening device 10, and the unloading device 30 is used to unload the bar-shaped workpiece 1b located in the straightening device 10.

[0085] The straightening machine 100 of the present invention also includes a frame 60, and the straightening device 10, the loading device 20 and the unloading device 30 are arranged on the frame 60, and the loading device 20 and the unloading device 30 can be respectively arranged on both sides of the straightening device 10. A loading conveying device 70 can also be provided on the side of the straightening machine 100 where the loading device 20 is provided, for conveying the annular workpiece 1a to the straightening machine 100. A unloading conveying device 80 can also be provided on the side of the straightening machine 100 where the unloading device 30 is provided. The unloading device 30 moves the straightened strip workpiece 1b to the unloading conveying device 80 for unloading operations.

[0086] When the annular workpiece 1a is configured as an annular stator, a mold 1c is provided on the annular stator to support and protect the annular stator core. When the annular stator is straightened into a straight stator bar by the straightening device 10, the annular stator needs to be demolded. To this end, the straightening machine 100 optionally further includes a demolding device 40, which is used to separate the mold 1c supporting the annular workpiece 1a from the annular workpiece 1a.

[0087] The structure of the demoulding device 40 is further described below. Figure 2 、 Figure 9 、 Figure 11 As shown, in one embodiment, the demoulding device 40 includes a placement component 41 and a demoulding component 42;

[0088] The placement component 41 is used to place the annular workpiece 1a having a mold 1c, and the demolding component 42 includes a first clamping member 421 and a downward pressing demolding head 422. The first clamping member 421 is used to clamp the outer peripheral side of the annular workpiece 1a, and the downward pressing demolding head 422 is used to move along a third direction toward the placement component 41 to eject the mold 1c located in the annular workpiece 1a.

[0089] In the present invention, the third direction can be the up and down direction. In the above embodiment, the placement component 41 can be arranged between the straightening device 10 and the loading device 20. After the loading device 20 obtains the annular workpiece 1a with the mold 1c from the loading conveyor 70, the annular workpiece 1a is placed on the placement component 41. The first clamping member 421 can be arranged on the outer peripheral side of the placement component 41, and is used to clamp and fix the annular workpiece 1a placed on the placement component 41. The downward pressing demolding head 422 can be arranged directly above the placement component 41, or directly below the placement component 41. The downward pressing demolding head 422 can be operated automatically or manually to move along the axial direction of the annular workpiece 1a toward the mold 1c, and the mold 1c is ejected from top to bottom or from bottom to top, so that the annular workpiece 1a completes the demolding operation.

[0090] In the above embodiment, in order to facilitate the loading of the annular workpiece 1a onto the workbench 11 after demoulding, as shown in FIG. Figure 2 、 Figure 9 As shown, in one embodiment, the straightening machine 100 also includes a transfer drive member 50 that drives and connects the demolding assembly 42, and the transfer drive member 50 is used to drive the demolding assembly 42 to move back and forth between a demolding position relative to the placement assembly 41 and a straightening position relative to the workbench 11.

[0091] With this arrangement, when the first clamping member 421 can clamp the annular workpiece 1a, after the annular workpiece 1a is demolded, the intermediate driving member 50 can drive the first clamping member 421 to move from the demolding position to the straightening position, thereby loading the demolded annular workpiece 1a onto the workbench 11. This eliminates the need for an additional loading assembly for the demolded annular workpiece 1a, and allows a portion of the demolding device 40 to be used to complete the loading of the demolded annular workpiece 1a. This can reduce the size of the straightening machine 100 and reduce the cost of the straightening machine 100.

[0092] Moreover, in order to further reduce the volume of the straightening machine 100, the demoulding assembly 42 and the unloading device 30 can also be installed on the same fixed frame, and the transfer drive member 50 can drive the connection to the fixed frame, thereby driving the demoulding assembly 42 and the unloading device 30 to move simultaneously. In this way, the transfer drive member 50 can be set to drive the demoulding assembly 42 and the unloading device 30 to move between the demoulding position, the straightening position and the unloading position, so that a single drive structure can simultaneously meet the transportation requirements of demoulding, straightening and unloading, thereby improving the compactness and reducing the volume of the straightening machine 100.

[0093] When the demolding assembly 42 and the blanking device 30 are installed on the same fixed frame and are both driven to move by the transfer drive 50, optionally, the blanking device 30 may include a lifting drive 32 and a second clamping member 31. The lifting drive 32 may be arranged on the fixed frame, and the lifting drive 32 drives the second clamping member 31 so that the second clamping member 31 can reciprocate along the third direction. In this way, when the transfer drive 50 drives the blanking device 30 to move above the workbench 11, the lifting drive 32 can drive the second clamping member 31 to descend, so that the second clamping member 31 can grab the straightened straight bar stator.

[0094] In addition, the transit drive member 50 can also drive the first clamping member 421 to move along the third direction. When the demolding assembly 42 is in the demolding position relative to the placement assembly 41, the first clamping member 421 can be driven to move toward the annular workpiece 1a, so that the first clamping member 421 can be moved to the circumferential side of the annular workpiece 1a, thereby facilitating the clamping of the annular workpiece 1a. When the demolding assembly 42 is in the straightening position relative to the workbench 11, the first clamping member 421 can be driven to move toward the workbench 11, so that the first clamping member 421 can place the demolded annular workpiece 1a on the workbench 11.

[0095] In the present invention, in order to realize the collection of the mold 1c after demolding, optionally, the placement component 41 includes a placement table 411, a lifting drive 412 and a positioning seat 413, the placement table 411 is provided with a through slot 411a, the through slot 411a is used for the movement of the positioning seat 413 and the mold 1c of the annular workpiece 1a, the placement table 411 is used to support the annular workpiece 1a, the positioning seat 413 is used to support the mold 1c of the annular workpiece 1a, the lifting drive 412 is used to drive the positioning seat 413 to move back and forth along the third direction extending from the through slot 411a, so as to eject the mold 1c after the annular workpiece 1a is demolded.

[0096] By setting a through slot 411a on the placement table 411, when the demoulding head 422 is pressed down to eject the mold 1c from the annular workpiece 1a, the mold 1c can be moved out of the placement table 411 through the through slot 411a. In addition, due to the setting of the positioning seat 413, when the mold 1c is ejected, the mold 1c can be supported by the positioning seat 413, and the positioning seat 413 is driven by the lifting drive member 412 to reciprocate in the third direction extending along the through slot 411a, so that when the mold 1c is ejected, the lifting drive member 412 can drive the positioning seat 413 to move downward, so that the positioning seat 413 moves downward at the same time as the mold 1c. When the annular workpiece 1a after demoulding is removed from the placement table 411, the lifting drive member 412 can drive the positioning seat 413 to rise, driving the mold 1c to rise synchronously, so that the mold 1c can be higher than the placement table 411, so that it is convenient to remove the material from the positioning seat 413.

[0097] like Figure 1 As shown, the present invention also proposes a stator winding production line 1000, including a de-rounding machine 200, a winding machine 300 and a straightening machine 100. The de-rounding machine 200 is used to reversely bend the bar-shaped stator core to form an annular stator core. The winding machine 300 is arranged on one side of the de-rounding machine 200, for receiving the annular stator core, and for winding wire on the annular stator core to form an annular stator. The straightening machine 100 is arranged on a side of the winding machine 300 away from the de-rounding machine 200, and the straightening machine 100 is used to straighten the annular stator to form a bar-shaped stator.

[0098] In the present invention, the stator winding production line 1000 further includes a transfer device 400, which is connected to the de-rounding machine 200, the winding machine 300 and the straightening machine 100 in sequence. The portion of the transfer device 400 located at the straightening machine 100 may be a loading and conveying device 70. The transfer device 400 has an input end close to the de-rounding machine 200 and an output end close to the straightening machine 100. The transfer device 400 loads a mold 1c for carrying an annular workpiece 1a from the input end. The operator loads a bar core into the de-rounding machine 200, and the de-rounding machine 200 bends the bar core into a ring shape to form an annular stator core, so that each sub-stator core of the annular stator core is The winding part faces the outside of the annular stator core, and the formed annular stator core is placed on the mold 1c of the transfer device 400, and is moved to the winding machine 300 via the transfer device 400. The winding machine 300 forms a reverse-bent annular stator, and is placed on the transfer device 400. It is transferred to the straightening machine 100 via the transfer device 400. The straightening machine 100 obtains the annular stator with the mold 1c, demolds the mold 1c, and straightens and unfolds the annular stator to form a bar-shaped stator. At the same time, the demolded mold 1c is moved to the transfer device 400 and transferred via the transfer device 400 to be unloaded from the output end of the transfer device 400 to complete the stator winding work.

[0099] The above description is merely an exemplary embodiment of the present invention and does not limit the scope of protection of the present invention. Any equivalent structural transformation made by using the contents of the present invention description and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the scope of protection of the present invention.

Claims

1. A straightening device, characterized in that: include: A workbench for placing annular workpieces; A positioning plate, provided on the workbench; The first straightening component is arranged opposite to the positioning plate. The first straightening component includes at least two pressing members. At least two of the pressing members are used to be inserted into the area enclosed by the annular workpiece and to abut the annular workpiece against the positioning plate. At least one of the pressing members is used to reciprocate along the extension direction of the positioning plate to unfold the annular workpiece into a strip-shaped workpiece.

2. The straightening device according to claim 1, characterized in that There are two pressing members, each of which has a first position inserted into the annular workpiece and a second position located at both ends of the strip workpiece. The two pressing members are used to move closer to or away from each other between the first position and the second position to unfold the annular workpiece to form the strip workpiece.

3. The straightening device according to claim 2, characterized in that The pressing member is configured as a roller, and the roller can roll along the surface of the annular workpiece and / or the strip workpiece.

4. The straightening device according to claim 2, characterized in that The straightening device also includes a first straightening drive member, which is used to drive the two pressure members to move closer to or away from each other along a first direction extending from the positioning plate; and / or, the first straightening drive member is used to drive the pressure members to move closer to or away from the positioning plate along a second direction, and the second direction intersects with the first direction.

5. The straightening device according to claim 4, characterized in that The first straightening assembly further includes a straightening mounting member, which elastically connects the pressing member and the first straightening driving member so that the pressing member elastically floats relative to the positioning plate.

6. The straightening device according to claim 1, characterized in that The straightening device further includes a second straightening assembly, which includes a pressing plate arranged opposite to the positioning plate, and the pressing plate is used to move toward the positioning plate so that the strip workpiece is clamped by the pressing plate and the positioning plate.

7. The straightening device according to claim 6, characterized in that The second straightening assembly also includes a plurality of pressure columns, which are arranged at intervals along the length direction of the pressure plate. Each of the pressure columns is movably arranged on the pressure plate along the second direction. When the bar workpiece is clamped by the pressure plate and the positioning plate, each of the pressure columns is used to abut against the bar workpiece.

8. The straightening device according to claim 6, characterized in that The straightening device further comprises a second straightening driving member drivingly connected to the pressing plate, wherein the second straightening driving member is used for driving the pressing plate to reciprocate in a direction opposite to the positioning plate.

9. The straightening device according to claim 1, characterized in that A convex arc surface is provided on a side of the positioning plate facing the first straightening assembly.

10. The straightening device according to any one of claims 1 to 9, characterized in that The straightening device also includes a limit assembly located on one side of the positioning plate, and the limit assembly includes a movable driving member and a limit head. The movable driving member is used to drive the limit head to move so as to position the annular workpiece and / or strip workpiece between the workbench and the limit head.

11. A straightening machine, characterized in that: include: The straightening device according to any one of claims 1 to 10; A loading device, the loading device is used to load the annular workpiece into the straightening device; as well as A blanking device is used to blank the bar-shaped workpiece located on the straightening device.

12. The straightening machine according to claim 11, characterized in that The straightening machine further comprises a demoulding device for separating the mold supporting the annular workpiece from the annular workpiece.

13. The straightening machine according to claim 12, characterized in that The demoulding device includes a placement component and a demoulding component; The placement assembly is used to place an annular workpiece having a mold, and the demoulding assembly includes a first clamping member and a downward-pressing demoulding head. The first clamping member is used to clamp the outer peripheral side of the annular workpiece, and the downward-pressing demoulding head is used to move along a third direction toward the placement assembly to eject the mold located in the annular workpiece.

14. The straightening machine according to claim 13, characterized in that The straightening machine further comprises a transfer drive member drivingly connected to the demoulding assembly, wherein the transfer drive member is used to drive the demoulding assembly to reciprocate between a demoulding position opposite to the placement assembly and a straightening position opposite to the workbench.

15. The straightening machine according to claim 13, wherein The placement assembly includes a placement table, a lifting drive and a positioning seat. The placement table is provided with a through slot, and the through slot is used for the movement of the positioning seat and the mold of the annular workpiece. The placement table is used to support the annular workpiece, and the positioning seat is used to support the mold of the annular workpiece. The lifting drive is used to drive the positioning seat to reciprocate along the third direction extending from the through slot, so as to eject the mold after the annular workpiece is demolded.

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