Cutting tool for friction lining paper for a torque converter

Abstract

The present invention relates to a paper cutting tool used for torque converters, wherein the paper cuts are made with dimensions of geometry, morphology and position within certain tolerances, such that it is a cutting tool for friction lining paper having a plurality of dies that are suitably distributed in a certain working area, so that the stresses of the cut on the adjacent edges of the cut lines are reduced, since there are gaps between the individual cutting areas that correspond to the pieces to be obtained.Care must be taken to ensure that the friction lining paper sheet has sufficient transverse dimensions to allow for a specific number of cuts. Therefore, a distribution of punches and an equal number of cutting cavities are provided, aligned to avoid stresses on the surrounding paper caused by adjacent cuts, which affects the tolerance of the cut dimensions and geometric tolerances. Furthermore, the area defined by the initial punch pattern must be cut to maximize the utilization of the friction lining paper.

Description

Technical field of the invention

[0001] The present invention relates to a cutting tool for paper, in particular for cutting friction lining paper, which is used for torque converters, wherein the dimensions of the geometry, morphology and position are within certain tolerances. background

[0002] Some devices have components that come into contact with each other during operation, causing friction and therefore wear. This wear is minimized by using a special type of paper, called segmented friction lining paper, which is bonded to the metal parts using a specific process. The friction lining paper has precise dimensions because the contact area on a metal plate of the torque converter is limited. Therefore, poor installation can lead to uneven wear of the friction lining paper during operation and / or performance failures of the torque converter itself. These failures can occur, for example, due to component displacement and oil flow issues through the friction lining paper. This would result in vibrations and noise during vehicle operation, as well as a deterioration of the vehicle's performance and operation. These friction lining paper segments are cut using a stamping or embossing process.This method is economical because the tool used consists of a blade mounted on a wooden base and a counterpart made of rubber or caoutchouc. The process is carried out manually by visually adjusting the material being cut and the blade. The following inventions for cutting paper are known and have been published in the following documents:

[0003] Canadian patent application number CA2158830 (A1), published on March 30, 1996, entitled “PUNCH TOOL WITH INTERCHANGEABLE DIE”, teaches a punching tool with an interchangeable die, so that different shapes or configurations can be punched from sheets of paper.

[0004] US patent application US4506824 (A), published on March 26, 1985, entitled "PAPER CUTTER," describes a paper cutter for separating exposure areas positioned along the longitudinal axis of a strip of photographic material. Individual print areas within an exposure area are also separated. The printing material is coded on its reverse side or at each edge of the exposure area according to the respective arrangement of the print areas, and the cutter decodes the edge code and generates a signal representing the arrangement of the print areas to be separated. The strip moves toward a cutting station, with the cutting elements in the cutting station being activated.

[0005] The method for cutting paper, especially friction-coated paper, must ensure compliance with the required dimensional tolerances for the cut paper segment. The main problems of the stamping process are: 1) The cutting accuracy of the tool is inadequate, as it does not meet the requirements of the product, which requires cutting accuracy tolerances of ± 0.15 mm, roundness tolerances of ± 0.2 mm and position tolerances of ± 0.2 mm; 2) Manual / visual adjustment of the material causes significant waste, as the process is very time-consuming and the material used depends on the accuracy with which the operator on duty works.

[0006] None of the above documents mention or describe devices that solve the problems mentioned above. Subject matter of the invention

[0007] The object of the present invention is to provide a cutting tool for friction lining paper with which the dimensions, geometry and position of the cut pieces are ensured within the tolerance limits defined for the applications required in torque converters. Brief description of the invention

[0008] To solve the problem of cutting friction lining paper pieces within permissible tolerances and to ensure cut reproducibility, a tool was developed that features a large number of dies appropriately distributed over a specific working area. Their distribution optimizes friction lining material consumption according to the required production volume and extends the service life of the cutting edges on the tool components due to the spacing created between them, thus reducing cutting stress.

[0009] Care must be taken to ensure that the friction lining paper sheet has sufficient transverse dimensions to allow for a certain number of cuts; for example, to make three aligned cuts in a row, the second cut is shifted a certain distance longitudinally to reduce the tension in the friction lining paper caused by the adjacent cut and to support compliance with dimensional tolerances.

[0010] Derived from the distribution of the punches and cutting cavities, a specific number of punching strokes are performed to cut the area defined by the initial pattern of the punches, thereby utilizing the greatest possible amount of friction lining paper while reducing waste. Brief description of the characters

[0011] The characteristic details of this innovative cutting tool for friction lining paper for a torque converter are clearly shown in the following description and in the accompanying figures and an illustration thereof, and the parts shown are designated by the same reference numerals. However, these drawings are shown for illustrative purposes only and are not to be considered as limiting the present invention. Fig. Figure 1 shows a perspective front view of the cutting tool. Fig. Figure 2 shows a perspective rear view of the cutting tool. Fig. Figure 3 shows a perspective side view of the cutting tool from the rear left. Fig. Figure 4 shows a perspective rear view of the cutting tool from the left. Fig. Figure 5 shows a perspective rear view of the cutting tool from below. Fig. Figure 6 shows a front view of the cutting tool. Fig. Figure 7 shows a front view of the cutting tool. Fig. Figure 8 shows a side view of the cutting tool from the left. Fig. Figure 9 shows a schematic rear view of the cutting tool along CUT AA in Fig. 8. Fig. Figure 10 shows a schematic side view of a cross-section of the cutting tool from the left. Fig. Figure 11 shows a second schematic side view of a cross-section of the cutting tool from the left. Fig. Figure 12 shows a side view of the cutting tool from the right. Fig. Figure 13 shows a top view of the cutting tool. Fig. Figure 14 shows a bottom view of the cutting tool. Fig. Figure 15 shows a perspective exploded view of the cutting tool from the rear. Fig. Figure 16 shows a perspective bottom view of a pressure shoe of the cutting tool. Fig. Figure 17 shows a perspective bottom view of a damping plate of the cutting tool. Fig. Figure 18 shows a detailed schematic view of a positioning element of the cutting tool. Fig. Figure 19 shows a perspective view of a positioning shaft of the cutting tool. Fig. Figure 20 shows a perspective view of a die holder plate of the cutting tool. Fig. Figure 21 shows a top view of a pressure pin of the stamp holder plate. Fig. Figure 22 shows a perspective view of a stamp of the stamp holder plate for the present invention. Fig. Figure 23 shows a perspective view of a punch guide plate of the cutting tool. Fig. Figure 24 shows a perspective view of a limiter aligner of a die holder limiter. Fig. Figure 25 shows a perspective view of a roll of a stamp holder limiter. Fig. Figure 26 shows a perspective top view of cutting dies. Fig. Figure 27 shows a perspective top view of paper feed guides. Fig. Figure 28 shows a perspective top view of paper output guides. Fig. Figure 29 shows a perspective top view of a lower counter-holder. Fig. Figure 30 shows a perspective top view of a workbench from behind. Fig. Figure 31 shows a perspective top view of a workbench base. Fig. Figure 32 shows a perspective top view of a workbench front panel. Fig. Figure 33 shows a perspective top view of a workbench back panel. Fig. Figure 34 shows a perspective top view of a workbench support. Fig. Figure 35 shows a perspective top view of workbench ramps. Fig. Figure 36 shows a perspective top view of a guide block. Fig. Figure 37 shows a top view of a section of the friction lining paper with the distribution of the cuts from a pattern area defined by the punch arrangement of the cutting tool of the present invention. Detailed description of the invention

[0012] The present invention relates to a cutting tool (01) for friction lining paper (02) used for torque converters, comprising a pressure shoe (100), pressure supports (200), an upper counter support (300), damping plates (350), a punch holder plate (400), a punch guide plate (500), cutting dies (600), a lower counter support (700), and a worktable (800). The cutting tool (01) complements a die-cutting press (not shown) which has the necessary features and capabilities for cutting friction lining paper (02) and is also synchronized with devices (not shown) for supplying the friction lining paper (02) in a manner that enables its processing by the cutting tool (01) of the present invention, for example, a paper feed device (not shown) which, together with the automatic feeder (not shown), controls the supply of the friction lining paper (02) to the cutting tool (01).

[0013] The pressure shoe (100), as in Fig. 1 to Fig. Figure 15 shows a plate with a dimension and thickness corresponding to the pressure exerted by the punch press (not shown) to make the cuts in the friction lining paper (02), and in particular is a plate with an upper shoe surface (101) and a lower shoe surface (102) such that a press shaft (not shown) sits on the upper shoe surface (101) which exerts a cutting pressure to transfer it to the punch holder plate (400) to produce the cut of the friction lining paper sheet (02) within the tool (01).

[0014] For illustrative purposes, the pressure shoe (100) is a plate with a rectangular geometry, although this geometry is adapted to the requirements of the friction lining paper cutting process (02). The pressure shoe (100) has a variety of shoe bores (110) for various purposes, for example, as support bores (111) to couple the pressure supports (200) and the upper counter support (300) in a superimposed state on the lower shoe surface (102), as shown in Fig. Figure 16 shows that near the transverse edges, aligned on the longitudinal plane of the pressure shoe (100) and symmetrical to its transverse axis, are bores that function as pressure seats (130) and are suitable for receiving the free end of a pressure pin (410) to transmit the force provided by the stamping press (not shown) to the punch holder plate (400). Furthermore, mounting notches (140) are provided near the vertices of the rectangular plate, as shown in Figure 16. Fig. 1, Fig. 5, Fig. 13 and Fig. 15 shown, to allow access to fasteners (not shown) of other components. The mounting notches (140) are elongated openings directed towards the nearest transverse edge and aligned parallel to the longitudinal axis of the pressure shoe (100), with a dimension that allows free passage for both fasteners (not shown) and a fastening tool (not shown) for installing or removing the fasteners (not shown).

[0015] At least one positioning element (120) is provided, as shown in Fig. 1, Fig. 4 to Fig. 6, Fig. 7, Fig. 8, Fig. 10 to Fig. 13, Fig. 16, Fig. 18 and Fig. Figure 19 shows a positioning element (121) housed in a corresponding positioning bore (112) in the pressure shoe (100) and comprising a positioning spring (121), a positioning screw (122), and a positioning shaft (123). The positioning bore (112) may be a blind bore, or alternatively, a through bore with a positioning plate (124) that closes the end facing the lower shoe surface (102) and is connected to the pressure shoe (100) by positioning connecting elements (125). The positioning plate (124) is aligned in the same plane as the lower shoe surface (102) to avoid interfering with other components. The positioning element (120) is positioned to align the pressure shoe (100) on the cutting tool (01) in a working position with the die-cutting press (not shown).According to the illustrated embodiment of the present invention, the positioning spring (121) is positioned concentrically in the positioning bore (112). The positioning shaft (123) is then placed onto the free end of the positioning spring (121), and the positioning screw (122) is then installed to depress the positioning shaft (123) and compress the positioning spring (121) such that a portion of the free end of the positioning shaft (123) protrudes beyond the upper shoe surface (101). The length of the positioning shaft (123) is less than the thickness of the pressure shoe (100), so that it has sufficient stroke, if necessary, to be received in the positioning bore (112). A shaft bore (123a) is provided, which is a double-diameter bore, to be retained by the head of the positioning screw (126).The positioning screw is properly mounted in the positioning plate (124) at the bottom of the positioning bore (112).

[0016] Each pressure support (200), as in Fig. 5, Fig. 6, Fig. 7 to Fig. 12 and Fig. As shown in Figure 16, a support is provided with a shorter length than the pressure shoe (100), the thickness of which is determined depending on the stroke of the press ram (not shown) of the stamping press (not shown) in order to provide the appropriate working height for the arrangement consisting of the pressure shoe (100), pressure support (200), and upper counter support (300), which are located in a superimposed configuration on the cutting tool (01). At least two pressure supports (200) are provided, each with a plurality of bores for coupling with fasteners of various components. The pressure supports (200) are mounted on the lower surface (102) of the shoe, aligned with and near the longitudinal edges of the pressure shoe (100), to which they are coupled by fasteners (not shown). Likewise, an upper counter support (300) is provided, which is coupled to the lower surface of the pressure supports (200) by fasteners (not shown).

[0017] The upper counterholder (300), as in Fig. 6 to Fig. 8, Fig. 11, Fig. 15 and Fig. As can be seen in Figure 16, a plate is coupled to the lower surface of the pressure supports (200) by means of fastening elements (not shown), having a length equal to the length of the pressure shoe (100) and a width at least equal to the area enclosed by the pressure supports (200) but less than the width of the pressure shoe (100), in particular less wide than the punch holder plate (400). The upper counterholder (300) has a plurality of upper counterholder bores (310) for various purposes for the operation of the cutting tool (01), for example, pin through bores (311) with a diameter for the free passage of a pressure pin (420), which are located near the transverse edges and are oriented symmetrically to the transverse axis of the upper counterholder (300) on its longitudinal plane, and which are coaxial with the pressure seats (130). Damping channels (320) are provided in which damping plates (350) are freely accommodated.The depth of the damping channels (320) allows the damping plates (350) to be exposed on the plane defined by the lower surface of the upper counter-support (300), and furthermore, their width allows the damping plates (350) to deform during operation of the cutting tool (01). The damping plates (350), as shown in . Fig. 8, Fig. 10, Fig. 11, Fig. 12, Fig. 16 and Fig. Figure 17 shows laminar bodies with damping bores (351) for coupling to the upper counterholder (300) by means of fastening elements (not shown), made of an elastic polymer material, through which the cutting force is gradually applied to the punch holder plate (400), with a length corresponding to that of the damping channels (320) in which they are housed and held in place by fastening elements (not shown).

[0018] The stamp holder plate (400), as in Fig. 1 to Fig. 12, Fig. 15 and Fig. As can be seen in Figure 20, the plate has a dimension and thickness corresponding to the pressure exerted by the die-cutting press (not shown) to make the cuts in the friction lining paper (02), and in particular is a plate with an upper punch holder surface (401) and a lower punch holder surface (402), such that the damping plates (350) and subsequently the upper counter-holder (300) sit on the upper punch holder surface (401) after the damping plates (350) have been deformed by the action of the die-cutting press (not shown), which exerts a cutting pressure on the pressure shoe (100) to produce the cut in the friction lining paper sheet (02) inside the tool (02).The punch holder plate (400) defines a working area, which is determined by the desired cutting area on the friction lining paper (02). This is necessary to prevent deformation of the friction lining paper (02) during operation of the die-cutting press (not shown) and to achieve a minimum force for cutting the desired paper sections. Within the area defined by the punch holder plate (400), a plurality of cutting punches (430) are distributed in a pattern determined by the pressure required to cut the friction lining paper, ensuring that the cut piece remains within the tolerance specifications for the paper being cut.

[0019] A variety of punch holder bores (410) are provided for different purposes, for example, pin bores (not shown) located near the transverse edges and aligned on the longitudinal plane of the punch holder plate (400) and symmetrical to its transverse axis, in each of which pressure pins (420) are installed, arranged coaxially with the pin passage bores (311) and with the pressure seats (130). The pressure pins (420) are, as shown in Fig. Figure 21 shows cylindrical elements installed on the upper punch holder surface (401), with a conical free end arranged in the pressure seats (130) suitable for absorbing the force supplied by the stamping press (not shown) via the pressure shoe (100), and a lower end with means for coupling to retaining means such as pin retaining setscrews (not shown) for releasably holding the pressure pin (420) in the pin bore (not shown). Therefore, setscrew bores (412) are provided for the installation of setscrews (not shown) that hold the end of the pressure pin (420) housed in the pin bore (not shown) and that project from the distal edge of the punch holder plate (400) perpendicular to the axis of the pin bore (not shown).Additionally, sliding bores (413) are provided, which are through bores in which punch holder slides (440) are installed, defining a displacement path of the punch holder plate (400) during operation of the cutting tool (01). The free ends of separating springs (530) rest on the lower punch holder surface (402).

[0020] Limiting bores (414) are provided through which punch holder limiters (540) slide and which supplement the means for limiting the sliding movement in the transverse and longitudinal direction of the punch holder plate (400).

[0021] Punch bores (415) are provided in which punch fastening elements (433) are located to hold the cutting punches (430) rigidly at a specific location and in a specific orientation, which enables the cutting of the friction lining paper (02) without the stresses spreading to the adjacent cut, thereby ensuring that the cutting of the desired friction lining paper piece (02) is within the geometric and positional tolerances.

[0022] The cutting dies (430), as in Fig. Figure 22 shows elements with a prismatic cross-section and a geometry corresponding to the shape of the friction lining paper piece (02) to be obtained; for example, they are bodies with a prismatic cross-section in the form of a circular segment. The cutting punches (430) have a sharp punch edge (431) with which the friction lining paper (02) is cut when the cutting tool (01) is operated; on one of their surfaces, for example, the distal surface opposite the sharp punch edge (431), there are punch mounting holes (432) in which the punch mounting elements (433) are coupled for the rigid fixation of each cutting punch (430) to the lower punch holder surface (402) of the punch holder plate (400).The multitude of cutting dies (430) are arranged in a distribution pattern that enables the stresses occurring during the cutting process in the friction lining paper (02) to be relieved, in order to ensure the dimensional properties remain within the specified tolerance limits for the friction lining paper piece (02) to be obtained. The distribution pattern of the cutting dies (430) defines a pattern area (02a), as shown in . Fig. Figure 37 shows rows of friction lining paper pieces (02) to be obtained, aligned in columns of friction lining paper pieces. For illustration, twelve cutting dies (430) are provided, forming the distribution pattern, the pattern area (02a) being suitable for aligning three paper pieces to be cut in each of the twelve cutting rows (F1-F12), and the width of the friction lining paper (02) enabling the alignment of three cutting columns (C1-C3) such that, in each of these rows, the spaced paper pieces are produced when the friction lining paper (02) is cut by the cutting dies (430) in a single cutting stroke performed by the die-cutting press (not shown), i.e.The cuts for obtaining the paper piece are made separately in the same cutting row (F1-F2), thus preventing the transfer of deformations and the propagation of stresses that occur during the punching of the friction lining paper (02) into the space defined for an adjacent paper piece, thereby ensuring the dimensional and geometric properties of the paper piece to be obtained. Optionally, the distribution pattern of the punches is such that some cutting rows (F1-F12) do not cut any paper pieces, so that in these initially cut-free zones the cuts are later created when the friction lining paper (02) is advanced in the cutting tool (01) to take the position of an adjacent cutting row.

[0023] The Fig. The punch guide plate (500) shown in Figure 23 is a plate with a surface area having a dimension equal to or greater than the pattern area (02a) circumscribed by the punch holder plate (400), and with a thickness corresponding to the stresses that occur during the operation of the cutting tool (01); it provides a plurality of guide cavities (510) with the same geometry and dimensions as the cutting punches (430), with which they are aligned to receive them slidably, with the necessary dimensional and tolerance deviations to allow alternating up and down movement of the cutting punches (430) through them; the punch guide plate (500) is a plate with an upper guide surface (501) and a lower guide surface (502) that rests on the lower counter support (700).A variety of punch bores (520) are provided for different purposes, for example, spring bores (521), which are blind holes in the upper guide surface (501) in which separating springs (530) are freely accommodated; limiter bores (522) in the upper guide surface (501) in which punch holder limiters (540) are rigidly installed; and guide bores (523), which are through bores, distributed according to the position of the punch holder slides (440) with which they are aligned to define the upward and downward displacement path of the punch holder plate (400).

[0024] The separating springs (530) are extending coil springs of a length that creates a gap between the punch holder plate (400) and the cutting dies (600) when the stamping press (not shown) retracts its press shank (not shown) and releases the pressure on the die shoe (100), allowing the friction lining paper (02) to slide between the lower guide surface (502) of the punch guide plate (500) and between the upper cutting surface (601) of the cutting dies (600). The number of separating springs (530) depends on the force required to hold the punch holder plate (400) at a distance from the cutting dies (600) when the stamping press (not shown) retracts its press shank (not shown).

[0025] The die holder limiters (540) include limiting rollers (541) which are in Fig. 25 loosely coupled with limiting screws (542) are shown to complement the definition of the upward and downward movement path of the punch holder plate (400) during actuation of the punch press (not shown) in order to cut the friction lining paper (02) and to obtain the paper pieces within the required geometric, dimensional, and positional tolerance limits. At the free end of each limiting screw (542) is a limiter aligner (543) such as the one shown in Fig. 24 is provided, with which the punch holder plate (400) is aligned with the pressure shoe (100). The number of punch holder limiters (540) depends on the operating characteristics of the cutting tool (01); for illustration, six punch holder limiters (540) are distributed on the punch holder guide plate (400). In these punch holder limiters (540), there is a floating coupling between the punch holder plate (400) and the punch guide plate (500), so that the limiting screws (542) are rigidly installed in the punch guide plate and the limiting roller (541) in each of them has a diameter that allows the up and down movement of the punch holder plate (400), since it is longer than the thickness of the punch holder plate (400).

[0026] Punch holder guides (550) are cylindrical rods rigidly mounted to the punch guide plate (500) by means of guide fixing elements (552) and a guide disc (551). In addition to the punch holder slides (440) on the punch holder plate (400), these punch holder guides (550) slide from the workbench supports (840) and from the workbench plates (820, 830) and the lower counter support (700). The number of punch holder guides (550) depends on the operating characteristics of the cutting tool (01); four punch holder guides (540) are shown for illustrative purposes.

[0027] The Fig. The cutting dies (600) shown in Figure 26 are plates with a surface area larger than the pattern area (02a) circumscribed by the punch holder plate (400) and with a thickness corresponding to the stresses that occur during operation of the cutting tool (01); a plurality of cutting cavities (610) with the same geometry and dimensions as the cutting punches (430) with which they are aligned to receive them slidably is provided, with necessary dimensional and tolerance deviations to allow an alternating up-and-down movement of the cutting punches (430) through them to cut the friction lining paper (02); optionally, more than one plate is provided to form the cutting die (600);Alternatively, two adjacent plates in the same plane are provided to form the cutting dies (600), each being a plate with an upper cutting surface (601) and a lower cutting surface (not shown) that rests on the lower support (700). A plurality of bores (620) are provided for various purposes, such as die bores (621), which are through bores distributed according to the position of the cutting cavities (610) for the installation of fasteners (not shown) for rigid coupling between the cutting dies (600) and the lower support (700). The circumferential edges of the cutting cavities (610) located on the upper cutting surface (601) are sharp edges that interact with the sharp edges of the cutting punches (430) to produce the desired cut of the paper piece.

[0028] The lower counterholder (700), as in Fig. 26 and Fig. Figure 29 shows a plate with a surface area larger than the pattern area (02a) circumscribed by the punch holder plate (400) and with a thickness corresponding to the stresses that occur during operation of the cutting tool (01). A die cavity (710) of sufficient dimensions is provided to accommodate the cutting dies (600). A plurality of counter-support cavities (720) with the same geometry and dimensions as the cutting punches (430) are provided, with which they are aligned to receive them slidingly, with the necessary dimensional and tolerance deviations to allow alternating up-and-down movement of the cutting punches (430) through them. The lower counter-support (700) is a plate with an upper surface of the lower counter-support (701) and a lower surface of the lower counter-support (702), which rests on the workbench support (840).The die cavity (710) has a depth such that the upper cutting surface (601) is aligned in the same plane as the upper surface of the lower support (701) when these two components are coupled. A plurality of lower support bores (730) are provided for various purposes, such as die retaining bores (731), which are bores aligned coaxially with the die bores (621) for the installation of fasteners (not shown) for rigid coupling between the cutting dies (600) and the lower support (700). The lower surface of the lower support (702) rests against the upper surface of the workbench support (840), for which purpose fastening bores (732) of the lower support are provided to secure the lower support (700) to the workbench support (840).Furthermore, counter-support slide bores (733) are provided for the installation of counter-support slides (740), from which the punch holder guide (550) slides. Additionally, centering bores (734) are provided in a dimension that allows for the accommodation of support centering pins (843), which are appropriately arranged for the aligned coupling between the lower counter-support (700) and the workbench support (840).

[0029] Paper guides (750) are provided at the distal ends of the lower counter-holder (700), which are in Fig. 26 to Fig. Figure 28 shows a system designed to hold the friction lining paper (02) in a process path and to facilitate feeding it to the cutting tool (01), with paper feed guides (751) and paper output guides (752) being indicated. Each of the paper guides engages at the corners of the lower support (700); each guide has an alignment channel (751a, 752a) in which the friction lining paper (02) is guided in alignment for cutting within the defined cutting tolerances. A channel root (751b, 752b) is aligned in the same plane as the upper cutting surface (601), which facilitates the unobstructed movement of the cutting paper (02).

[0030] The in Fig. 30 to Fig. 36 Workbench shown (800) comprises a workbench base plate (810), a workbench front plate (820), a workbench rear plate (830), a workbench support (840) and workbench ramps (850) as well as a guide block (860).

[0031] The in Fig. The workbench base plate (810) shown in Figure 31 is a plate with a surface area and thickness suitable for the stresses that occur in the structure of the cutting tool (01) when it is in operation. Workbench anchor holes (811) are provided for the placement of anchoring devices (not shown) that ensure the positioning of the cutting tool (01) on the floor. A suitable number of rope ring holders (812) are also mounted on this plate, enabling the complete tool to be loaded and moved using a crane and chains, as is common practice for this type of tool.

[0032] The in Fig. The workbench front plate (820) shown in Figure 32 is a plate that is perpendicularly coupled to the workbench base plate (810) and has a geometry and thickness that allow it to absorb the stresses that occur in the cutting tool (01) when it is in operation, for which purpose it has a certain height. A series of workbench front plate holes are provided at the upper edge of the workbench front plate (820) for various purposes, such as front support holes (821) for coupling the workbench support (840) by fasteners (not shown); and front guide holes (822) in which the ends of the punch holder guides (550) are slidably housed. The workbench front plate (820) has discharge windows (823) to provide visual access to the cutting tool's (01) cutting collection area and, if necessary, to remove the cutting material accumulated in this area through the discharge windows (823).

[0033] The in Fig. The workbench rear plate (830) shown in Figure 33 is a plate that is perpendicularly coupled to the workbench base plate (810) and has a geometry and thickness that allow it to absorb the stresses that occur in the cutting tool (01) when it is in operation, for which purpose it has a specific height corresponding to that of the workbench front plate (820). A series of workbench rear plate holes are provided at the upper edge of the workbench rear plate (830) for various purposes, such as rear support holes (831) for coupling the workbench support (840) by means of fasteners (not shown); and rear guide holes (832) in which the ends of the punch holder guides (550) are slidably accommodated.

[0034] The workbench front plate (820) and the workbench rear plate (830) are coupled perpendicularly to the workbench base plate (810) and aligned parallel to each other, arranged symmetrically to the longitudinal axis of the workbench base plate (810) and their free edges form a plane that runs parallel to the workbench base plate (810) and determines a working height that is suitable for operation in conjunction with the stamping press (not shown), from which the coupling of the various components takes place.

[0035] The in Fig. The workbench support (840) shown in Figure 34 is a rectangular frame with a suitable thickness to withstand the stresses that occur during the operation of the cutting tool (01), with the same surface area as the lower counter support (700) to which it is coupled. The workbench support (840) is coupled to the free edges of the workbench front plate (820) and the workbench rear plate (830) by fasteners (not shown), thus providing a rigid structure that withstands the stresses during the operation of the cutting tool (01).A variety of support bores are provided for different purposes, for example, support mounting bores (841) to accommodate the fasteners (not shown) that enable the coupling of the workbench support (840) to the workbench front plate (820) and the workbench rear plate (830); guide support bores (842) are also provided in which the ends of the punch holder guides (550) are slidably mounted and which are accordingly aligned coaxially with the front guide bores (822) and the rear guide bores (832). Ramp support bores (833) are provided for the rigid mounting of the workbench ramps (850) by fasteners (not shown). Centering pins (843) are provided, which are aligned coaxially with the centering bores (734) of the lower counter support (700) and are slidably mounted there.

[0036] The in Fig. The 35 workbench ramps (850) shown are ideally coupled to the distal ends of the workbench support (840), which are laminar bodies, with a ramp anchoring section (851) and a loading section (852) in which the paper pieces obtained by actuating the cutting tool (01) slide. Ramp anchoring sections (851a) are provided in the ramp anchoring section (851) for the installation of fasteners (not shown) for mounting the workbench ramps (850) to the workbench support (840).For illustration, two workbench ramps (850) are provided, which are oriented in a mirror image to each other, wherein the loading sections (852) have an inclination with respect to the plane defined by the workbench support (840), wherein the lower edges of the workbench ramps (850) are spaced apart from each other for the passage of the cut pieces of paper, so that together with the facing inner surfaces of the workbench front plate (820) and the workbench rear plate (830) an ejection funnel is formed.

[0037] The leading block (860), as in Fig. Figure 36 shows a prismatic body mounted on the workbench base plate (810) between the workbench front plate (820) and the workbench rear plate (830), which helps to position an automatic feeder (not shown) for material (not shown) to the cutting tool (01) and to achieve precise sliding of the material within the cutting tool (01), in conjunction with a material flow control (not shown) according to the calculation carried out for the cutting of the friction lining paper (02), at a displacement step distance per stroke of the punch press (not shown). Best embodiment of the invention

[0038] To produce the cut of a piece of paper with dimensional properties within the tolerances specified for its application, friction lining paper (02) is fed to a feed end of the cutting tool into a position in which the die-cutting press (not shown) is in a retracted position, so that the separating springs (530) are extended and press on the punch holder plate (400), thereby separating it from the cutting dies (600).

[0039] In this state, the friction lining paper (02) slides into the input alignment channels (751a) of the paper feed guides (751) and up to the output alignment channels (752a) of the paper output guides (752), and the end is coupled to a paper pull device (not shown) which, together with the automatic feeder (not shown), complements the displacement of the friction lining paper (02) by the cutting tool (01) and creates tension in it to ensure that the paper pieces are cut within the required dimensional and geometric tolerance limits.Once the friction lining paper (02) is in the desired position, the die-cutting press (not shown) is activated, so that its press shaft (not shown) presses on the pressure shoe (100), and the counter-holder thereby compresses the damping plates (350) to deform them and subsequently presses the upper counter-holder (300) against the pressure pins (420), causing the punch holder plate (400) to move towards the cutting dies (600). This causes the punches to slide into the guide cavities (510) and towards the cutting cavities (610) in the cutting dies (600), so that the friction lining paper (02) is cut by the sharp edges of the cutting punches (430) and the cutting cavities (610). The cutting pattern of the produced paper pieces is a discontinuous pattern, as shown in . Fig.Figure 37 illustrates why, after a cutting stroke of the die-cutting press (not shown), uncut zones remain. Therefore, the press shaft (not shown) must be retracted so that the separating springs (530) extend again and press against the punch holder plate (400), thus separating it from the cutting dies (600). Both the automatic feeder (not shown) and the paper puller (not shown) are activated synchronously to move the friction lining paper (02) in the cutting tool (01), creating tension on it to change its position and produce a cut in other zones that do not have a cut for the paper piece. In a new position, the die-cutting press (not shown) is reactivated to produce a new cutting cycle.It is necessary to repeat a certain number of cutting cycles with the same number of strokes of the stamping press (not shown) in order to produce all possible cuts in an initial pattern area (02a) defined by the distribution of the cutting punches (430). For example, for the cutting pattern defined by the distribution of the cutting punches (430) proposed in the present application, five strokes of the stamping press (not shown) are required to complete the area of ​​an initial pattern.

[0040] The invention has been sufficiently described to enable a person with average technical knowledge to reproduce and obtain the results mentioned by the inventors in the present invention. However, any person skilled in the technical field may make modifications not described in this application within the scope of the present invention. If, however, the application of such modifications in a given structure or in the manufacturing process thereof requires the subject matter claimed in the following claims, then such structures should be included in the scope of the invention. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] CA 2158830

[0003] US 4506824 (A

[0004]

Claims

[1] Cutting tool (01) for friction lining paper (02) used for torque converters, characterized bythat it comprises a pressure shoe (100), which is a plate with an upper shoe surface (101) and a lower shoe surface (102), such that the free end of a press shaft of a punching press rests on the upper shoe surface (101) to exert a cutting pressure to produce the cut of the friction lining paper (02); pressure supports (200), which are pads attached to the lower shoe surface (102) and whose thickness is determined depending on the stroke of the press ram; an upper counterholder (300), which is a plate coupled to the lower surface of the pressure supports (200);a punch holder plate (400), which is a plate with a dimension and thickness corresponding to the pressure exerted by the punching press to make the cuts in the friction lining paper (02), with an upper punch holder surface (401) facing the upper counter-holder (300) and a lower punch holder surface (402) on which a plurality of cutting punches (430) are provided; a punch guide plate (500), which is a plate having a plurality of guide cavities (510) with the same geometry and dimensions as the cutting punches (430) with which they are aligned, and with dimensional and tolerance deviations that allow them to be slidably received;Cutting dies (600) which are plates having a plurality of cutting cavities (610) with the same geometry and dimensions as the cutting punches (430) with which they are aligned to receive them slidingly, with dimensional and tolerance deviations to accommodate them and allow alternate up and down movement of the cutting punches (430) therethrough for cutting friction lining paper (02); a lower counterholder (700) which is a plate having a die cavity (710) of sufficient dimension to receive cutting dies (600) and a plurality of counterholder cavities (720) with the same geometry and dimensions as the cutting punches (430) with which they are aligned to receive them slidingly, with dimensional and tolerance deviations that allow alternate up and down movement of the cutting punches (430) therethrough;a workbench (800) having structural elements designed to withstand the stresses that occur in the cutting tool (01) during operation; so that the friction lining paper moves between the lower guide surface (502) and the upper cutting surface (601) of the cutting dies (600); a plurality of cutting punches (430) arranged in an array corresponding to a discontinuously distributed pattern so that the pieces of paper are cut at a distance from one another when the friction lining paper (02) is cut with the cutting punches (430) in a single cutting stroke performed by the punching press, in order to relieve the stresses in the friction lining paper (02) that occur during cutting and to ensure that the dimensional properties, roundness and position are within the tolerance limits specified for the piece of paper;Damping plates (350) made of a resilient polymer material coupled to the upper anvil (300) by fasteners for gradually exerting a cutting force on the punch holder plate (400); wherein:; - the damping plates (350) first sit on the upper punch holder surface (401); - the upper counterholder (300) rests on the upper punch holder surface (401) after the damping plates (350) have been deformed and compressed by the action of the punch press exerting a cutting pressure on the pressure shoe (100) in order to produce the cut of the friction lining paper sheet (02) in the tool (02). [2] Cutting tool (01) for friction lining paper (02) according to claim 1, further characterized by that the cutting tool (01) complements a punching press which has the properties and capabilities required for cutting friction lining paper (02). [3] Cutting tool (01) for friction lining paper (02) according to claim 1, further characterized by that the cutting tool (01) is synchronized with a paper pulling device and with an automatic feed in order to control the feed of the friction lining paper (02) to the cutting tool (01). [4] Cutting tool (01) for friction lining paper (02) according to claim 1, further characterized by in that the pressure shoe (100) has a plurality of shoe bores (110) for various purposes, for example support bores (111) for coupling the pressure supports (200) and the upper counter-holder (300) in a superimposed state on the lower shoe surface (102). [5] Cutting tool (01) for friction lining paper (02) according to claim 1, further characterized bythat near the transverse edges and aligned on the longitudinal plane of the pressure shoe (100) and symmetrical to its transverse axis there are holes which act as pressure seats (130) and are suitable for receiving the free end of a pressure pin (410) in order to transmit the force provided by the punch press to the punch holder plate (400). [6] Cutting tool (01) for friction lining paper (02) according to claim 1, further characterized by in that each pressure support (200) is a support with a shorter length than the pressure shoe (100), the thickness of which is determined as a function of the stroke of the press ram of the punching press in order to provide the appropriate working height of the assembly of pressure shoe (100), pressure support (200) together with the upper counter-holder (300), which are located in a superimposed configuration on the cutting tool (01). [7] Cutting tool (01) for friction lining paper (02) according to claim 1, further characterized bythat at least two pressure supports (200) with a plurality of bores are provided for coupling with fastening elements of various components. [8] Cutting tool (01) for friction lining paper (02) according to claim 1, further characterized by that the pressure supports (200) are mounted on the lower shoe surface (102), aligned with and near the longitudinal edges of the pressure shoe (100), to which they are coupled by fastening elements. [9] Cutting tool (01) for friction lining paper (02) according to claim 1, further characterized by that an upper counter-holder (300) is provided which is coupled to the lower surface of the pressure supports (200) by fastening elements. [10] Cutting tool (01) for friction lining paper (02) according to claim 1, further characterized byin that the upper counter-holder (300) is a plate which is coupled to the lower surface of the pressure supports (200) by fastening elements, with a length equal to the length of the pressure shoe (100) and a width which is at least equal to the area defined by the pressure supports (200), but smaller than the width of the pressure shoe (100), in particular less wide than the punch holder plate (400). [11] Cutting tool (01) for friction lining paper (02) according to claim 1, further characterized by in that the upper counter-holder (300) has pin through-holes (311) with a diameter for the free passage of a pressure pin (420), which are located near the transverse edges and are aligned on the longitudinal plane of the upper counter-holder (300) symmetrically to its transverse axis, which are coaxial with the pressure seats (130). [12] Cutting tool (01) for friction lining paper (02) according to claim 1, further characterized bythat damping channels (320) are provided in which damping plates (350) are freely accommodated. [13] Cutting tool (01) for friction lining paper (02) according to claim 1, further characterized by that damping channels (320) are provided with a depth such that the damping plates (350) are exposed on the plane defined by the lower surface of the upper counter-holder (300), and with a width that allows the deformation of the damping plates (350) during operation of the cutting tool (01).

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