MXPA97004708A - Cube, pulley and met - Google Patents

Abstract

The present invention relates to a pulley with a hub that is formed by notching with roller of a portion of metal displaced radially from one side of an intergral, annular sheet of metal that leaves a cloth and where the improvement is characterized because comprises: the disk has an annular inward portion forming an annular collar that extends radially inwardly of an inner diameter of the hub and wherein the collar is integral with the fabric prior to forming the roller notch of the hub and defines an orifice no exit from the cu

Description

CUBE, PULLEY AND METHOD * DESCRIPTION OF THE INVENTION The invention relates to a cube or pulley of a metal sheet made by forming on a roller , but more particularly the invention relates to a hub with a dead hole and a method for shaping the hub. The machined cubes are sometimes linked to -. »Fabrics and flanges formed from sheet metal for manufacturing pulleys A sheet metal cloth (or disc) and flange are attached to a hub machined by welding or bronze welding. A machined hub can provide complicated shapes such as a closed hole, but it introduces the problems of weight, cost and a problematic process of joining accurately and align a fabric and flange portion to complete the pulley. The cubes or sheet metal pulley can be formed by forming with press using a series of dies or rotating formation using mandrels or rollers or a combination thereof. For example, a pulley with an integral hub that is press formed is described in U.S. Patent No. 5,441,456 with a stepped orifice in Figure 5 and a hole with a groove that receives a groove in Figure 8. grooves 25 receiving the web are formed by spinning on the flange the pulley. Another pulley with an integral hub is shown in U.S. Patent 4,824,422. One problem area with press forming and spin forming processes is that they can introduce bent metal shapes that introduce high tension areas into the folds that are subject to failure by cracking and fracture by fatigue. German Patent No. 4444526 describes a method of forming a hub by rotating formation where a forming roller is pressed against a side of a rotating annular disc of the metal sheet, which is supported on an opposite side with a head mandrel. The forming roller moves progressively rapidly and inwardly against the side of the rotating disk, which displaces a portion of metal while the thinned part of the disk and form a side wall having a thickness that is less than the thickness of the original metal sheet. An annular wave was formed as the metal is displaced and which progressively extends axially. A forming roller presses the metal annularly displaced against a mandrel, while simultaneously forming an integral cube to the disk. The present invention relates to spinning formation of this type where a cube is integral with a cloth or disk and where a cube is formed of metal displaced from one side of the disc formed of the metal sheet. One problem with such cubes is that complicated orifice shapes (is can not be produced easily compared to the machined cubes. A hub according to the present invention is a rotating strip formed of a radially displaced metal portion of one side of an integral sheet metal sheet or fabric. An annular collar that extends into the hub and create a hole without an exit. The collar is integral with the hub and the cloth or disc and is formed from the same sheet of metal. The hub thus formed, which is integral with the fabric or collar disc, can be joined to a flange or the end of the disc can be formed into a flange to form a pulley. During the entanglement process, a forming roll is pressed against the side of an annular disk of the metal sheet. The forming roller is moved progressively, radially inwardly against the side of the rotating disk, which displaces a portion of metal in the form of an axially extending annular wave. The metal thus displaced is pressed against a forming roller to form the integral hub having a hole. The annular disc has an inner diameter that is smaller than a maximum diameter of the hub bore. A stepped mandrel maintains an inward, annular portion of the disc during the rotary notching process to form the hub and defines a collar annular that is integral with the disk and the cube creating a * hole without cube exit. An object of the invention is to provide a pulley with a hub, which is integral with a cloth or disc and integral with a collar to define a hole without exit from the hub. The dead hole and the integral collar can be advantageously used to join the hub in a precise axial position in an arrow or shaft.

Optionally, a key or flute can be formed in the hole with no outlet. Another object of the invention is to provide a method of notching a bucket with an integral fabric and collar from a metal foil disc to provide a dead-end hole. BRIEF DESCRIPTION OF THE DRAWINGS These and other objects or advantages of the invention will be apparent after reviewing the drawings and descriptions thereof, in which: Figure 1 is a cross-sectional diagram, 20 illustrating the key elements of a machine for form by rotary notching and an annular disc placed in the machine for the formation of rotary notching; Figure 2 is a view similar to Figure 1, but showing the machine and the disc placed near the beginning of the formation of the notch; Figure 3 is a view similar to Figure 2, but showing a progressive operational stage; Figure 4 is a view similar to Figure 3, i but showing a progressive operational stage; Figure 5 is a view similar to Figure 4, but showing the stoppage of the final notch formation; Figure 6 is an enlarged view of a portion of Figure 5, showing a hub of the invention as formed by notching and still positioned in the machine; Figure 7 is an enlarged view taken along line 7-7 of Figure 6 and showing a detail of the tooling of the roller notch; Figure 8a - 8e are cross sections as along a radial line from the centerline of an annular disc showing the progressive displacement of the metal portion from a portion of the annular disc and the formation of a hub of the invention, - Figure 8f is a partial view , similar to Figure 9e illustrating a fold or fold in the formation of a cube; Figure 9 is a cross-sectional view of a flat pulley with a hub of the invention; Figure 10 is a cross-sectional view of a v-rim pulley with a hub of the invention; Figure 11 is a cross-sectional view of * a pulley with a v-band with a hub of the invention; Figure 12 is a cross-sectional view of a pulley with a flange portion engaging the band that is attached to a hub of the invention; Figure 13 is a view taken along line 13-13 of Figure 9, showing an optional embodiment of an integral fabric with a hub of the invention; Figure 14 is a view similar to Figure 13 f10 showing an optional embodiment for a cube of the invention. With reference to Figures 1-7, an annular disc 10 of sheet metal is placed for work with a rotary notching forming machine 12, which includes a head mandrel 14, a stepped mandrel 16, a first forming roller 18, a holding roller 20 and a second forming roll or finishing roller 22 of the hub. In Figure 1, the annular disk 10 is placed on a guide piece 24 of the head mandrel 14, where the outer diameter 26 of the guide piece is dimensioned for an inner diameter 28 of the disk. The head 14 has a cylindrical groove 30 sized to receive the outer diameter 32 of the disc and where the groove has a depth 34 that is less than the thickness T of the disc.

The stepped mandrel 16 has a guide piece that receives the hole 38 with an internal diameter 40 dimensioned to receive the guide piece, an external diameter 42 dimensioned for a desired internal diameter of a hub that will be formed, a radial step 44 sized for a desired thickness of the hub to be formed and an end 46 dimensioned to receive and retain an inward, annular portion 48 of the disk. The step mandrel 16, the -_, first forming roll 18, holding roll 20 < s 10 and the second forming roller 22 are positioned separately from the mandrel head 14 in an initial position, to facilitate loading and positioning of the annular disk 10 on the guide piece and against the mandrel head. Figure 2 shows the machine 12 for training of notching with roller in an initial run position where the annular disk is beginning to be shaped into a shape that, when finished, includes the features of the invention. The stepped mandrel is moved in an axial direction M, where the guide piece 24 is in a coupled position with the hole 38 that receives the guide piece. The end 46 is pressed against the annular inner portion 48 of the disc, to retain it in position during the forming process. The holding roller 20 is transferred to its operating position and moved in a direction H, of such so that a cylindrical surface 50 of the roller presses against an exposed annular portion 52 of the disk so what keeps in an interleaved position against the mandrel head. i The forming roller is transferred to a position for the initial formation by moving it in a SA direction, such that a rounded edge 54 of the forming roll is pressed against the disk. The mandrel and the head are rotated, which rotates the disk. The holding roller 20 and the forming roller 18 are also free to rotate as the disc rotates. The forming roller with its rounded surface 54 initiates the displacement of a portion of the metal 58 on one side of the disc, which is supported on an opposite side by the head of the mandrel. The initial displacement forms an annular groove 60 on the side of the disc that is worked. The forming roller is progressively moved radially inward against the side of the disc, which displaces metal from the side of the disc and thins the disc, while forming a further side wall thin 62 in a portion of the disc. The forming roller forms an annular wave 64 that extends axially in a progressive manner of the displaced metal. The forming roller continues to move progressively inward in the direction SR2 as shows in Figure 4. Ring wave 64 extending axially, it lengthens and comes in contact with a * tapered surface 66 of the forming roller. The tapered surface is oriented so that it is substantially parallel 68 when in contact with the ring wave that is extends axially. The contact with the tapered surface causes the wave to take on an initial cube shape 70. The radially inward movement of the first forming roll is stopped in one position ^ wr. predetermined, as the annular wave that extends ^ 10 progressively approaches the contact with the stepped mandrel. As shown in Figure 5, the roll 22 for formation of the secondary hub or shape is activated and placed with a tapered surface 72 against the annular wave 64 that extends progressively. The surface The tapered mandrel is placed to be substantially parallel 74 with the stepped mandrel 16, when in contact with the annular wave 64. The shaping roller is moved in shape. 'f progressively radially inward in the direction SR3, which presses the annular wave 64 against the stepped mandrel which forms the hub 76, which is integral with the disc and the disc having a thinner side wall 62 or fabric. As shown in Figure 6, the inward, annular portion 48 of the disc is maintained between the end 46 of the stepped mandrel and the head 14. The portion 48 toward inside, annular defines an annular collar that is integral with the disc and the cube, creating a hole without exit of the cube, which will be explained later along with Figures 9a to 9e. With reference to Figure 7, it is preferred that the The head mandrel includes a tapered surface 80 at an angle A of about 2 - 3o, or more preferably of 2 ° 2"and a tapered surface 82 of the obverse at an angle B of about 1 - 2o and more preferably of about Io 31". When such spindle taper chuck , the side wall 62 (shown in hidden lines for clarity) is used, the side wall progressively tapers to the angle A and in one direction of the wave 64 during the forming process as the forming roll moves in shape progressive radially inward and progressively tapers on the obverse at an angle B during the formation of the wave as the shaping roll progressively moves radially inwardly. The tapering and tapering of the side wall of the disc prevents the displaced metal from fold as the hub is formed during the process for the formation of notch with roller. Figures 8a to 8e illustrate the progressive formation of a hub of the invention, when a head mandrel having a taper and an obverse taper is uses. As previously explained, the process for forming an integral cube of the invention, is initiated with an annular disk 10 of the metal sheet with an inner, annular portion that is held in interleaved form between the stepped mandrel and the head mandrel (not shown) 5 in the Figure 8a. With reference to Figure 8b, an annular wave 64 that extends progressively is formed as the forming roller progressively moves radially inwardly r "*" inwardly of the disc as the metal is displaced from the side of a disk. The thinner side wall 84 is formed, which tapers progressively in a direction of the wave 64. As the wave is formed, an annular groove 88 is progressively also formed in a generally opposite manner to the ring wave on the side opposite of disc. As the shaping roller progressively moves radially inwardly, the annular wave 64 extends axially further away as shown in Figure 8c and the annular groove 90 becomes deeper in an annular band that narrows. With reference to Figure 8d, the side wall 86 tapers on the obverse as the shaping roll moves progressively radially inward and the side wall follows the taper obverse of the spindle chuck. Annular wave 64 extends axially to a greater extent and can form a curl 92 around the rounded surface 54 of the forming roller. The annular groove 92 begins to compress to 1 degree that it becomes deeper and narrower. 5 In Figure 8e, the process for forming is completed when the second roll or forming roll 22 forms the annular wave in a cube 76. The annular groove 96 is compressed leaving an integral disc 10, the hub 76 and the "aunt collar that defines a hole without exit 94 cube, where the inner diameter 28 of the disc is smaller than the diameter 42 that establishes the hole of the hub. If care is not taken during the notching process, it is possible that the annular groove is compressed in such a way that a portion of the side wall is bends on itself as the annular groove 88, 90, 92, 94 is compressed when the hub 76 is formed. With reference to Figure 8f, an integral cube 98 with a sidewall of disk 100 and an annular collar 102, may include a circumferential fold if care is not taken in forming the side wall during the training process. It is believed that when the side wall 84 is formed with a taper followed by an obverse taper, it helps to control the flow of the displaced metal, such that there is no noticeable bending of the metal near the hub which could weaken the metal. cube, when the slot 94 is compressed. The cube with a fold 104 usually results when a mandrel is used flat head. The hub 76 of the invention with its integral disc 10 or fabric and the integral annular collar 78, can be used together with the pulleys, for example, those shown in Figures 9-14. With reference to Figure 9, a cylindrical pulley 106 is illustrated. The outer circumferential edge of the disc 10 (or fabric) is divided in a known manner to form an integral cylindrical rim 108. A pulley 110 with a v-rim is shown in FIG.

Figure 10, in which the outer circumferential edge of the disc 10 is divided in a known manner, to form a rim 110 having a plurality of v-grooves 112 for coupling a band with a v-rim. In Figure 11, a v-belt pulley 114 is shown where the outer circumferential edge of the disc 10 is divided in a known manner, to form a rim 114 having at least one v-groove 116. In Figure 12, a combination of V-belt / V-belt pulley 118, where the outer circumferential edge of the disk 10 is formed in known manner on a substantially cylindrical surface 120. A flange of the notched metal sheet 122 is manufactured in known manner, such as by use of a sheet container of metal and forming it by rotary notching on a flange which includes processes for forming notches with a roller and is made to include a v-band groove 124 and v-grooves 126. The rim 118 is formed with a cylindrical member 128 having a diameter that is greater than the rim 20 of the disc 10. The rim 120 of the disc 10 is attached to the cylindrical member 128 by means of a rubber layer 130. The rubber layer 130 can be advantageously used to provide elasticity between the hub 16 and the flange 122 to effect a damping.

As shown in Figure 12, the hub 76 is positioned on an arrow 132, which is shown in hidden lines. The pulley 118 is attached to the arrow 132, such as by means of a cover screw 134, shown in hidden lines. With reference to Figure 13, the disc 136 may optionally include a plurality of perforations 138, to define the arms 140 that join the flange of the pulley 142. The perforations are optionally used to lighten the pulley. A key 144 can be formed optionally in the hole of the integral hub 146. With reference to Figure 14, the disc 10 may optionally include a hub 148 having a groove that receives a groove 150 formed in its orifice.

The above detailed description is made with the # purpose of illustration only and is not intended to limit the scope of the claims. ?

Claims (18)

1. CLAIMS # 1. A pulley with a hub that is formed by a roller notch of a metal portion radially displaced from one side of an integral metal sheet disc and wherein the improvement is characterized in that it comprises: an annular collar that is extends into an internal diameter of the hub and in which the collar is integral with the disc and hub and creates a dead hole ? .10 of the cube. The pulley according to claim 1, characterized in that the disc interconnects a flange with a portion receiving the selected band from the group consisting of i) a substantially cylindrical surface and 15 ii) at least one v-groove. The pulley according to claim 2, characterized in that the flange is formed from the metal sheet by notching formation. The pulley according to claim 3, characterized in that the fabric is integrally joined to the flange. The pulley according to claim 3, characterized in that the fabric is attached to the flange with an intermediate layer of rubber. 6. The pulley according to claim 3, "Characterized in that the cube_has a groove that receives the flute formed in an inner diameter of the cube. The pulley according to claim 3, characterized in that the hub has a key formed in an internal diameter of the hub. The pulley according to claim 1, characterized in that the disc has a side wall with a radially outer portion, tapering in one direction 10 towards the cube and a radially inner, interconnected portion that tapers on the obverse. 9. A cube formed by notching with roller of a portion of metal radially displaced from one side of an integral sheet metal disk and characterized in that The improvement comprises: an annular collar extending inwards from an inner diameter of the hub and in which the collar is integral with the fabric and the hub and creates a hole without exit from the hub. 10. The hub according to claim 9, characterized in that the hub has grooves that receive the groove formed in an internal diameter of the hub. The cube according to claim 8, characterized in that the hub has a key formed in a 25 inner diameter of the cube. 12. A method for forming a cube by pressing # a forming roll against one side of a rotating annular disc of the metal sheet while the disc is supported on an opposite side with a rotating head mandrel; move 5 of the forming roll progressively radially inwardly against the side of the rotating disc and displacing a portion of metal, while the part that slims from the disc and forms a side wall and forms ^ - - simultaneously an annular wave that extends axially, iflr ^ 10 progressive metal shifted; finishing the radial movement of the shaping roller, while pressing the annular wave against an axially extending, rotating mandrel while simultaneously forming an integral hub with the disk and with a hole configured for the 15 mandrel, wherein the improvement is characterized in that it comprises: rotating an annular disk having an inner diameter that is smaller than a maximum diameter of the hub orifice; 20 pressing the wave against an axially extending stepped mandrel, rotating with an adjacent end of the rotating head, the end dimensioned to press and hold an annular inward portion of the disc, located between the inner diameter of the disc and the maximum diameter of the disc. 25 cube hole, when the cube is formed, the portion towards inside the disc that defines an annular collar, which is integral with the disc and the hub, creating a hole without exit from the hub. I 13. The process according to claim 5, characterized in that during the step of forming the side wall, the steps comprise progressively tapering a portion of the side wall in a wave direction during the formation of the wave; and so on and progressively taper the obverse of a W 10 portion of the side wall during the formation of the wave. 14. The process in accordance with the claim 13, characterized in that during the step of forming the side wall, the step of supporting the disk with a rotating head having a first annular surface that is 15 towards the disc, followed by a second annular surface with an obverse taper separating from the disc. 15. The process in accordance with the claim 14, characterized in that the first surface is tapered at an angle of approximately plus 2-3 and the second 20 surface is tapered at an angle of minus 1 - 2o. 16. The process according to claim 14, further characterized in that it comprises the step of forming a key in the dead hole. 17. The process according to claim 13, further characterized in that it comprises the step of forming a groove in the dead hole. The process according to claim 13, further characterized in that it comprises the steps of forming an annular, progressive groove on the side of the disk supported by the head, the groove formed progressively, generally opposite to the ring wave; and compress the groove without substantial bending of the displaced metal during the stage 10 press the annular wave against the mandrel extending axially.