Tool and attachment system for eliminating coating impregnation defects in stators

Abstract

The invention relates to a tool for eliminating coating impregnation defects in the internal walls of stators, comprising: a substantially laminar damping piece (F) made of a malleable material, wherein a face (F1) thereof has a curvature of not more than 20º, while the other face (F2) is flat; a rigid base (P) that fixedly supports the damping piece (F) by means of the flat face (F2); and connection elements for firmly connecting the damping piece (F) to the rigid base (P). The invention also relates to a system for hangingly attaching a stator, formed by: an attachment and rotation system positioned centrally inside the stator (E) and designed to support and rotate at least three tools for eliminating coating impregnation defects in the internal walls of motor stators.

Description

[0001] TOOL AND CLAMPING SYSTEM FOR ELIMINATING IMPREGNATING DEFECTS IN STATOR COATINGS

[0002] TECHNICAL FIELD OF THE INVENTION

[0003] The present invention relates to the technical field of Mechanics, because it provides a tool to eliminate impregnation defects of resin and / or varnish coatings on motor stators; as well as providing a clamping system, comprising said tool, which holds the stator in a suspended manner and in turn eliminates the resin and / or varnish impregnation defects, by the use of the tool.

[0004] BACKGROUND OF THE INVENTION

[0005] The impregnation process involves adding varnish or resin—where varnish is resin plus solvent and resin is an organic polymer—to the motor stator to fill all the spaces, thus increasing the motor's thermal conductivity and mechanical and dielectric strength. Of the two filling agents, resins produce the best results, and these can be polyester, epoxy, or silicone resins.

[0006] Currently, during the development of the resin impregnation process by dripping, traces of resin are observed. 1 , delamination in the inner diameter 2 and stator oscillation correction for electric motor 3 .

[0007] The drip resin impregnation process in electric motors presents several challenges that affect the quality of the final product. Currently, problems such as resin traces, delamination in the inner diameter, and stator wobble have been identified. These issues are critical, given that the quality standard specifies the absence of contamination in the inner diameter, as any alteration can cause interference in the final motor assembly. Another challenge has been delamination at the jaw contact points. During contact between the jaws and the material, the stack laminations can separate excessively, producing lamination gaps in the inner diameter that exceed the given specifications. These irregularities can lead to eddy currents, which, in turn, negatively impact motor performance.

[0008] US patent document US2024079939A1 describes an impregnation installation for symmetrical axial components of electric motors that includes: a fixed support frame; a fixed heating station for heating each component to a predefined temperature, each fixed heating station having one or more motorized support devices to support the components and a rotational movement, in both directions of rotation around a predefined axis of rotation, and a tilting movement, with respect to a predefined plane, provided in each component mounted on its respective support device; an impregnation module for coating at least part of each component with an impregnating substance; and a transport and loading / unloading module for transferring components to and from the fixed heating stations.The support frame has a handling and guiding device, which has the impregnation modules and the transport and loading / unloading modules mounted on it in a movable manner and, in a removable manner, selectively receives another mobile working module from the impregnation plant.

[0009] Patent document W02023248030A1 describes an impregnation plant for axially symmetrical components (100) of electric motors, comprising: a support frame (12), one or more component heating stations (14), one or more motorized units (16) for supporting and handling the components, one or more component impregnation units (18), and one or more component transport and loading / unloading units (20). Each motorized support and handling unit (16) comprises at least one gripping device (22) for a respective component, motorized devices (24) for rotating the gripping devices (22), and motorized means (26) for translating (26) each of the motorized support and handling units (16).Each gripping device (22) comprises an annular body (28) provided with an axially symmetrical internal cavity (30) having a maximum dimension greater than the maximum dimension of each component, such that said internal cavity (30) can internally house the component. Each annular body (28) comprises at least one gripping means (32) oriented towards the internal cavity (30) for grasping the outer lateral surface of each component and holding it in the internal cavity (30).

[0010] Patent document EP3756770A1 describes an impregnation plant for hollow internal cylindrical components of electric motors. The plant comprises at least one heating station, configured to heat the components to a predetermined temperature; at least one impregnation station, configured to coat the components with an impregnating substance; at least one finishing station, configured to permanently bond the impregnating substance to each component; and at least one support apparatus, configured to rotatably support a component and move it from one workstation to another. The support apparatus comprises at least one gripping assembly, provided with a plurality of grippers extendable by rotation about a predefined axis, and at least one actuator assembly, configured to rotate the grippers about the predefined axis in both directions.Each clamp is petal-shaped, with a first root portion articulated to the body of the support apparatus and a second gripping portion formed integrally in one piece with the first root portion and inclined at a predetermined angle with respect to the first root portion, wherein the second gripping portion is arc-shaped and provided with a knurled gripping surface for contact gripping the inner cylindrical surface of a respective component.

[0011] In order to contribute to the solution of the problems found in the state of the art, a tool has been developed to eliminate impregnation defects of resin and / or varnish coatings in motor stators; as well as providing a clamping system, which includes said tool, which holds the stator in a suspended manner and in turn eliminates the coating defects of resin and / or varnish impregnation, by the use of the tool.

[0012] The characteristic details of the present invention are clearly shown in the following detailed description, figures and examples which are included for the sole purpose of illustrating its conception, technical advantages and some of its preferred embodiments.

[0013] BRIEF DESCRIPTION OF THE FIGURES

[0014] Figure 1 is a conventional perspective view of a damping piece (F) that is part of the tool for removing resin impregnation defects on internal walls of motor stators, as proposed by the present invention.

[0015] Figure 2 is a conventional perspective view of a preferred embodiment of the damping piece (F) that forms part of the tool for removing resin impregnation defects on internal walls of motor stators, according to the present invention.

[0016] Figure 3 is a top plan view of the damping piece (F) illustrated in Figure 2, according to the present invention.

[0017] Figure 4 is a side view of the damping piece (F) illustrated in Figure 2, according to the present invention, showing a close-up of a section to illustrate the detail of the chamfer.

[0018] Figure 5 is an exploded perspective view of the tool for removing resin impregnation defects on internal walls of motor stators, according to the present invention.

[0019] Figure 6 is an exploded top perspective view of the tool for removing resin impregnation defects from the internal walls of motor stators, according to the present invention, showing all its components. Figure 7 is an exploded bottom perspective view of the tool for removing resin impregnation defects from the internal walls of motor stators, according to the present invention.

[0020] Figure 8 is a side exploded perspective view of the tool for removing resin impregnation defects on internal walls of motor stators, according to the present invention.

[0021] Figure 9 is a conventional perspective view of the tool for removing resin impregnation defects on internal walls of motor stators, according to the present invention, in its assembled condition.

[0022] Figure 10 is another conventional perspective view of the tool for removing resin impregnation defects on internal walls of motor stators, according to the present invention, in its assembled condition.

[0023] Figure 11 is a side view of the tool for removing resin impregnation defects on internal walls of motor stators, according to the present invention, in its assembled condition.

[0024] Figure 12 is a conventional perspective view of the tool shown in Figure 9, where the location of cuts A-A' and B-B' are schematically illustrated.

[0025] Figure 13 is a cross-section A-A' of the tool for removing resin impregnation defects on internal walls of motor stators, according to the present invention.

[0026] Figure 14 is a longitudinal section B-B' of the tool for removing resin impregnation defects on internal walls of motor stators, according to the present invention.

[0027] Figure 15 is a perspective view of a stator clamping system applied to a motor stator, schematically illustrating the arrangement of three tools for removing resin impregnation defects on the internal walls of motor stators, according to the present invention. Figure 16 is a comparative image showing the defects caused by different prototype damping parts (F) (byc), compared with the conventional clamp (a).

[0028] DETAILED DESCRIPTION OF THE INVENTION

[0029] As previously mentioned, resin and / or varnish traces refer to the unwanted thickness of these coatings that accumulates at the contact points of the clamps or the points where they grip the stator. To address this issue, a new clamping system has been implemented with a tool that significantly reduces impregnation defects. This innovation not only improves the product's aesthetic quality but also optimizes its functionality.

[0030] Furthermore, careful control has been exercised over product oscillation during the impregnation process. The new tool configuration provides greater stability to the stator, especially during the constant rotation required at this stage. By mitigating oscillation, the stator's position is kept constant, reducing the possibility of additional resin contamination.

[0031] The solution is to reduce and / or eliminate the resin footprint 1 , delamination in the inner diameter 2 and stator oscillation correction for electric motors 3 .

[0032] 1 Resin footprint: residues of said substance present in the internal diameter of the stator that may be greater than the product specification after the resin dripping process, which may determine whether the stator resulting from this process is rejected for the next process because it will have a physical interference with its counterpart “rotor”.

[0033] 2Delamination in the inner diameter: separation between laminations that make up the body of the electric motor stator, generated by the current clamping system by exerting a greater concentration of force at the contact points of its insert geometry; this separation determines that the resulting stator is not viable for the next process because it will be affected in the electrical and magnetic performance.

[0034] 3 Stator oscillation for electric motor: effect of stator position variation against the resin dripping system in one revolution about the axis of the supporting system, affecting the uniformity of the resin layer applied in each area of ​​the stator since each drop falls closer or further away from the insulating paper that must be soaked by it.

[0035] A. Tool for removing defects in the impregnation of resins and / or varnishes in motor stators.

[0036] Therefore, an object of the present invention is a tool for removing defects in the impregnation of resins and / or varnishes on stators, such as delamination and resin and / or varnish marking on the internal walls of motor stators. This tool comprises: a damping piece (F) of a substantially laminar configuration, made of a malleable material, wherein one of its faces (F1) has a curvature of no more than 20°, while the other face is flat (F2); a rigid base (P) configured to firmly support the damping piece (F) by means of its flat face (F2); and to be securely attached to a mechanism; and

[0037] - fastening elements to strongly join the shock-absorbing piece (F) to the rigid base (P); which can be selected from the following group: glues, screws (4), bolts with nuts, nails, pins, spindles, and / or a combination thereof.

[0038] It is preferable to use a malleable material to manufacture the damping piece (F) so that it conforms to the inner wall of the stator (E) and adapts to the different diameter measurements of said stator (E). An example of this malleable material could be a thermoplastic polyether ether ketone; although another malleable material that provides the advantages sought by the present invention could be used.

[0039] A preferred embodiment of the tool for removing delamination defects and resin marks on the internal walls of motor stators, according to the present invention, is where the damping piece (F) comprises: a series of grooves (F3 and F4) on the face (F1) with a curvature no greater than 20°; and a series of protrusions (FT) resulting from the grooves (F3 and F4). This configuration effectively eliminates delamination and resin marks, as excess resin is concentrated in the grooves (F3 and F4) and distributed to areas with less resin, resulting in a more homogeneous resin layer.

[0040] The orientation of the grooves (F3 and F4) will be that which facilitates and eliminates delamination and resin marking; for example, the orientation can be longitudinal (F3), transverse (F4), diagonal, circular, either simultaneously or not; to cite some examples.

[0041] Another preferred embodiment of the tool according to the present invention is when the shock-absorbing piece (F) further comprises fastening elements for attaching to the rigid base (P); for example, these can be perforations (F5) through which the joining elements, for example, screws (4), are inserted to strongly join the shock-absorbing piece (F) to the rigid base (P).

[0042] A more preferred embodiment of this tool is when the protrusions (F1”) located at the ends of the piece comprise a chamfer; for example, a 3 mm x 60° chamfer with a radius at the intersection, thereby achieving a good distribution of the resin or varnish

[0043] A further embodiment of the tool for removing delamination defects and resin marks on the internal walls of motor stators is when the rigid base (P) has a profile in the shape of a “T”, and its vertical portion (P2) is of a rectangular configuration and has a lower hole (P3) in its central part.

[0044] Therefore, in one modality of the tool in question, the horizontal portion (P1) of the rigid base comprises fastening elements to fix the shock-absorbing piece (F); these can be holes (P4) into which the joining elements are inserted that join and fix the shock-absorbing piece (F) strongly, so that said holes (P4) coincide in shape, dimensions and location, with the shape, dimensions and location of the perforations (F5) of the shock-absorbing piece (F).

[0045] In a further embodiment of the tool according to the present invention, it further comprises: a connecting piece (I) configured to join said tool to a support base (B); and a first clamping element (3) for securing the tool to the support base (B).

[0046] The connecting piece (I) can be machined in one piece and may comprise the following elements: an upper rectangular channel (I2) located in the upper central part of the connecting piece (I), which has sufficient dimensions to receive the vertical portion (P2) of the rigid base (P) inside; a longitudinal eyelet (I3) at the bottom of the upper rectangular channel (I2) with a socket (not shown) for a screw head, symmetrical to the center by 34 mm between them; a lower rectangular channel (11), located in the lower central part of said connecting piece (I); and a fork (I4) was provided at the center of the longitudinal edge of each wall of the lower rectangular channel (11).

[0047] In an alternative embodiment of the connecting piece (I) is that the section comprising the upper rectangular channel (12) is narrower than the section where the lower longitudinal channel (11) is located; which can be done by applying an external longitudinal recess (I5) in the section where the upper rectangular channel (I2) is located; and a chamfer (I5') towards the section where the lower rectangular channel (11) is located; but it can be done in some other way.

[0048] The first fastening element (3) can be a stainless steel screw which is inserted through the bottom of the connecting piece (I) passing through the eyelet (I3) until its tip is fixed in the lower hole (P3) of the rigid base (P).

[0049] Another embodiment of the tool according to this invention is that it may further comprise: a base-support (B) configured to operationally support the tool that removes delamination defects and resin marks on the internal walls of motor stators of the present invention; and a second clamping element (1) for securing the base-support (B) with said tool.

[0050] It should be clarified that the base-support (B) can be of those already known in the state of the art, such as those made up of: a lower rectangular channel (B1) located in the lower central part of the base-support (B) and an upper rectangular channel; a transverse central perforation (B4) at the midpoint of the length of the base-support (B) and between the upper section (B2) and the section where the lower rectangular channel (B1) is located;

[0051] - Two external support elements (B5) are provided on each side of the base (B), on which the lower edges of the lower rectangular channel (11) of the connecting piece (I) rest, and are therefore located externally and diametrically opposite each other, with respect to the central transverse perforation (B4), between the upper section (B2) and the section comprising the lower longitudinal channel (B1); and a lower transverse perforation (B3) that passes transversely through the walls of the lower rectangular channel (B1) located towards the extremities below the external support elements (B5).

[0052] It should also be noted that the base-support can be modified for improved functionality. For example, the upper channel can be removed, and the upper section (B2) can be made either completely solid or not, and have a substantially rectangular shape to fit snugly into the lower rectangular channel (11) of the connecting piece (I), thus achieving a better grip. The external support elements (B5) can be: rectangular projections, laminar projections, channels, grooves, circular projections, and / or a combination thereof.

[0053] As a second fastening element (1) a stainless steel screw can be used, which is housed in the duct formed by the fork perforation (I4) of the connecting piece (I) and the transverse central perforation (B4) of the base-support (B).

[0054] B. System for securing stators and eliminating defects in the impregnation of resins and / or varnishes in motor stators.

[0055] According to Figure 15, another object of the present invention is a system for the suspended support of a stator (E), which comprises:

[0056] - a conventional (unillustrated) clamping and rotating system, located in the inner center of the stator (E) and configured to support and rotate;

[0057] - at least three tools for removing coating impregnation defects on the internal walls of motor stators, according to claims 1 to 21, which are diametrically opposed and equidistant from each other, attached to the clamping and rotation system by means of their base-support (B) and their damping pieces (F) make contact with the internal wall of the stator (E). EXAMPLES

[0058] The following examples are included to illustrate the concept, technical advantages, and some preferred embodiments of the present invention and should not be considered as limiting the scope of protection of the present invention.

[0059] Example 1. Construction of a tool to remove delamination defects and resin marks on the internal walls of motor stators.

[0060] A conventional base-support (B) was manufactured, which is a piece of AISI / SAE 1018 steel with general dimensions of 60 X 25 X 22 mm (length X width X height), and had a lower rectangular channel (B1 ) of 11 X 8.3 mm; an upper rectangular channel of 8 mm diameters; a transverse perforation (B3) that passes through the walls of the upper rectangular channel (B1 ) towards each of its ends, said transverse perforation (B3) had a diameter of 4 mm and were located at a separation of 37 mm between them; a central transverse perforation (B4) of 6.5 mm diameter at the center and 11 mm away from the base of the base-support (B); and two external support elements (B5) on each side of the base-support (B), which were 4 mm high X 2.5 mm wide and located at a height of 11.7 mm from the base of said base-support (B).

[0061] A connecting piece (I) was manufactured, which is also a piece of AISI / SAE 4140T blued steel, with dimensions of 50 x 30 x 48.4 mm (length x width x height). It was provided with a lower rectangular channel (11) of 20 x 18 mm, where it was coupled to the upper portion (B2) comprising the upper rectangular channel of the base-support (B). It also had an upper rectangular channel (I2) of 8 x 6 mm; a longitudinal eyelet (I3) of 4.3 mm diameter with a socket (not shown) for a screw head of 7.5 x 4.5 mm diameter and symmetrical to the center by 34 mm between them, was provided at the bottom of the upper rectangular channel (I2), connecting to the lower rectangular channel (11). A fork (I4) was provided in the center of the longitudinal edge of each wall of the lower rectangular channel (11), said central fork (I4) had a diameter of 6.5 mm at the center and 6.5 mm away from its base.

[0062] To reduce the width of the portion comprising the upper rectangular channel (12), a 20 mm side cutout was machined with a depth of 20.4 mm ending in a 45° chamfer (15) at the intersection of the overall base width; and four lower side cuts of 15 x 11.2 mm were created due to the location of the fork (I4).

[0063] The connecting piece (I) has the function of holding the base-support (B), which makes a connection between a central rotation system (not illustrated) and the connecting piece (I), controlling the total height of the system and conducting the clamping force from the central system to the internal walls of the stator.

[0064] The method of joining the base-support (B) to the connecting piece (I) is illustrated in Figures 6 to 14, where the portion comprising the upper rectangular channel (B2) of the base-support (B) is inserted into the lower rectangular channel (I1) of the connecting piece (I). Therefore, it is important that the central transverse perforation (B4) and the perforation of the fork (I4) coincide in dimensions, shape, and location to allow the insertion of the second screw (1), which passes through both pieces and is secured with a nut (2), so that the base-support (B) and connecting piece (I) are firmly joined together. The screw (1) used was ISO4762 M6x35 and the nut DIN4032 M6, both stainless steel.

[0065] A rigid base (P), with a T-shaped profile in this example, was made of SAE 304 stainless steel with overall dimensions of 60 x 16 x 7.7 mm (length x width x height). The vertical portion (P2) was configured and sized to fit snugly and longitudinally into the upper rectangular channel (I2) of the connecting piece (I). A central lower hole (P3) was provided in the center of the vertical portion (P2). Four through-holes (P4) were drilled linearly in the center of the horizontal portion (P1)'s flat surface. The through-holes at the ends were spaced 48 mm apart and had a total depth of [missing value], while the through-holes at the center were spaced 16 mm apart and also had a total depth of [missing value].

[0066] To join the rigid base (P) with the connecting piece (I), the vertical portion (P2) of the rigid base (P) was inserted into the upper rectangular channel (I2) of the connecting piece (I), then a first screw (3) was inserted vertically through the lower part of the connecting piece (I), passing through the longitudinal eyelet (I3) until it was inserted into the lower central hole (P3) of said rigid base (P), see figures 6 to 14. The screw (3) was ISO4762 M4x25 stainless.

[0067] A shock-absorbing piece (F) was also manufactured, which was a rectangular, laminar piece of PEEK thermoplastic with overall dimensions of 60 x 16 x 4 mm (length x width x height); a series of longitudinal (F3) and transverse (F4) grooves, 1 mm wide and 2 mm deep, were machined into this piece, creating rows of quadrangular protrusions (FT) on its laminar face where it has a curvature no greater than 20°; four perforations (F5) of 3.3 mm in diameter were also made, leaving an area free of protrusions (FT) around each perforation (F5) to allow the seating of the head of a screw (4) of 6.5 mm in diameter and a depth of 2 mm with respect to the crest of the upper diameter; in this case, 6 longitudinal rows and 20 transverse rows of quadrangular protrusions (FT) were formed; The transverse rows of quadrangular protuberances (F1 ”) at the ends were given a chamfer (F5) of 3 mm X 60°.

[0068] The screw (4) to join the shock absorber piece (F) to the rigid base (P) was an ISO7380 M3x8 head screw, which was inserted through the hole (F5) of the shock absorber piece (F), until it reached the hole (P4) of the rigid base (P).

[0069] This is why the rigid base (P) must maintain the geometry of the damping piece (F) to prevent its deformation; in addition, this damping piece (F) provides flexibility of adjustment for different positions or sizes of the stators; and withstands high temperature and humidity environments to which the stator is subjected during its use.

[0070] The damping piece (F) makes contact with the internal walls of the stator, improving the distribution of stresses to prevent delamination, as well as channeling excess resin away from the surface of the stator, preventing contamination in unwanted areas. This damping piece (F) withstands high compressive force, high temperatures, humidity and chemical resistance for handling the resin.It has a Rockwell R126 hardness, a temperature range of -28 to 248°C, a tensile strength of 14,000-16,000 psi, is chemical resistant, electrically insulating, food contact safe, high strength, low thermal expansion, slippery, wear resistant, and can be used with acetic acid, acetone, beverages, bleach, coolant, diesel fuel, food, fuel oil, gasoline, heating oil, hydraulic fluid, hydrochloric acid, hydrogen peroxide, isopropyl alcohol, kerosene, methanol, methyl ethyl ketone (MEK), mineral oil, phosphoric acid, sodium hydroxide, and water. Chemical resistance: Acetic acid, acetone, bleach, coolant, diesel fuel, fuel oil, gasoline, heating oil, hydraulic fluid, hydrochloric acid, hydrogen peroxide, isopropyl alcohol, kerosene, methanol, methyl ethyl ketone (MEK), mineral oil, phosphoric acid, sodium hydroxide, water.

[0071] Example 2. Evaluation of the tool for removing delamination defects and resin marks on the internal walls of motor stators.

[0072] According to the requirements of the stator design and control plan, these indicate that there cannot be contamination or resin trace greater than 60 p in the inner diameter of a stator, just as a delamination defect greater than 500 p is not allowed.

[0073] The machines (clamps) for holding stators, of the state of the art, present serious deficiencies, evidenced by contamination and the delamination effect on the inner diameter of the stator, defects that can be seen in figure 16.

[0074] In accordance with the product and process requirements, a first prototype of a damping component (F), as shown in Figure 1, was developed. This prototype initially eliminated the delamination defect in the inner diameter. However, the resin mark persisted (see Figure 17), leading to the design of a second prototype of the damping component, as shown from Figure 2 onwards.

[0075] For this new prototype, as already mentioned, the basic geometry of the first prototype was maintained (Figure 1), implementing a groove that reduced the impregnation surface. This aimed to decrease or eliminate the visual evidence of the applied resin marks, see Figure 18.

[0076] After conducting multiple tests with the second prototype, a significant improvement in the impregnation pattern was observed. Measurements of the mark thickness revealed that they were virtually imperceptible. However, the measurement system was validated to ensure its reliability.

[0077] For this test, a stator (E) with an inner diameter range of 227 mm was used.

[0078] After verifying that the measuring system was correct, more samples were taken to determine the thickness difference between the pieces manufactured with the original jaws and the new tools. The results obtained are shown in Figure 16, where it can be seen that the tools that had the damping piece (F) of the present invention (byc) had a better distribution of the resin.

[0079] Measurements confirmed the effectiveness of the new design compared to the previous clamps. Unfortunately, after conducting several experiments with the second prototype, a failure occurred: the shock-absorbing piece (F) detached from the base of the insert. This happened because the two components were bonded with an adhesive, which proved insufficient given the system's exposure to high temperatures and constant forces. Despite this, at this stage of development, the shock-absorbing piece (F) of the present invention fulfilled its intended function, but its lifespan, subject to constant exposure to a high-temperature environment, must be considered.

[0080] Given this situation, a mechanical assembly between components was implemented, offering a more robust solution to prevent future failures. The rigid base (P) was also redesigned, facilitating faster manufacturing and allowing its adjustment to different stator models (E), thus increasing the system's versatility.

[0081] Despite the challenges encountered, the development of the new prototypes demonstrates significant progress in stator (E) quality control. The second prototype met initial expectations, and the shift to a mechanical assembly method represents a crucial step toward continuous improvement. The ability to adapt to various stator models also promises a positive impact on the operability and logistics of the production process.

Claims

CLAIMS 1. A tool for removing coating impregnation defects on the internal walls of motor stators, characterized in that it comprises: - a damping element (F) of a substantially laminar configuration, made of a malleable material, wherein one of its faces (F1) has a curvature no greater than 20°, while the other face is flat (F2); a rigid base (P) configured to firmly support the damping element (F) by means of its flat face (F2); and to be firmly attached to some mechanism; and - joining elements to strongly join the shock absorber piece (F) to the rigid base (P).

2. The tool of claim 1, wherein the malleable material from which the shock-absorbing part (F) is made is a thermoplastic polyether ether ketone material.

3. The tool according to claim 1, wherein the joining elements for strongly joining the shock-absorbing piece (F) to the rigid base (P) are selected from the following group: glues, screws (4), screws with nuts, nails, bolts, spindles, and / or a combination thereof.

4. The tool according to claim 1, wherein the damping piece (F) comprises: a series of indentations (F3 and F4) on the face (F1) having a curvature no greater than 20°; and a series of protrusions (FT) originating from the indentations (F3 and F4).

5. The tool of claim 4, wherein the slots (F3 and F4) are arranged longitudinally (F3), transversely (F4) and / or diagonally, simultaneously or not.

6. The tool according to claims 1 and 4, characterized in that the shock-absorbing piece (F) further comprises fixing elements for attachment to the rigid base (P).

7. The tool according to claim 6, wherein the fastening elements are perforations (F5) through which the joining elements are inserted to strongly join the shock-absorbing piece (F) with the rigid base (P).

8. The tool according to claim 4, wherein the protrusions (F1 ”) located at the ends comprise a chamfer.

9. The tool of claim 8, wherein the chamfer is 3 mm X 60° with a radius at the intersection.

10. The tool as claimed in claim 1, wherein the rigid base (P) has a “T” shaped profile, and its vertical portion (P2) is of a rectangular configuration and has a lower hole (P3) in its central part.

11. The tool of claim 10, wherein the horizontal portion (P1) comprises fastening elements for attaching to the shock-absorbing piece (F).

12. The tool according to claim 11, wherein the fastening elements are through holes (P4) into which the joining elements are inserted, which join and firmly fix the shock-absorbing piece (F), such that said holes (P4) coincide in shape, dimensions and location with the shape, dimensions and location of the perforations (F5) of the shock-absorbing piece (F).

13. The tool according to claim 1, characterized in that it further comprises: a connecting piece (I) configured to join said tool to a support base (B); and a first clamping element (3) to fasten the tool to the support base (B).

14. The tool of claim 13, wherein the connecting piece (I) comprises: an upper rectangular channel (I2) located in the upper central part of the connecting piece (I), which has sufficient dimensions to receive the vertical portion (P2) of the rigid base (P) inside; a longitudinal eyelet (I3) at the bottom of the upper rectangular channel (I2) with a socket for a screw head; a lower rectangular channel (11), located in the lower central part of said connecting piece (I); and a fork (I4) provided at the center of the longitudinal edge of each wall of the lower rectangular channel (11).

15. The tool of claim 14, wherein the connecting piece (I) further comprises an external longitudinal recess (I5) in the section where the upper rectangular channel (I2) is located; and a chamfer (I5') towards the section where the lower rectangular channel (11) is located.

16. The tool according to claim 15, wherein the chamfer (I5') is 45°.

17. The tool according to claims 13 and 14, wherein the fastening element (3) is a stainless steel screw which is inserted through the lower part of the connecting piece (I) passing through the eyelet (I3) until its tip is fixed in the lower hole (P3) of the rigid base (P).

18. The tool according to claims 13 and 14, characterized in that it further comprises: a base-support (B) configured to operationally support the tool that removes delamination defects and resin marks on the internal walls of motor stators; and a second clamping element (1) for securing the base-support (B) with said tool.

19. The tool of claim 18, wherein the base-support (B) comprises: a substantially rectangular upper section (B2) for insertion into the lower rectangular channel (11) of the connecting piece (I); a lower rectangular channel (B1) located in the lower central part of the base-support (B); a transverse central perforation (B4) machined at the midpoint of the length of the base-support (B) and between the upper section (B2) and the section where the lower rectangular channel (B1) is located; - Two external support elements (B5) are provided on each side of the base (B), on which the lower edges of the lower rectangular channel (11) of the connecting piece (I) rest, and are therefore located externally and diametrically opposite each other, with respect to the central transverse perforation (B4), between the upper section (B2) and the section comprising the lower longitudinal channel (B1); and a lower transverse perforation (B3) that passes transversely through the walls of the lower rectangular channel (B1) located towards the extremities below the external support elements (B5).

20. The tool according to claim 19, wherein the external support elements (B5) are: rectangular projections, laminar projections, channels, grooves, circular projections, and / or a combination thereof.

21. The tool according to claims 14 and 18, wherein the second fastening element (1) is a stainless steel screw, which is housed in the duct formed by the fork perforation (I4) of the connecting piece (I) and the transverse central perforation (B4) of the base-support (B).

22. A system for securing a stator, characterized in that it comprises: - a clamping and rotation system, which is located in the inner center of the stator (E) and is configured to support and rotate; - at least three tools for removing coating impregnation defects on the internal walls of motor stators, in accordance with claims 1 to 21, which are diametrically opposed and equidistant from each other, attached to the clamping and rotation system by means of their support base (B) and their damping pieces (F) make contact with the internal wall of the stator (E).

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