MXPA97004916A - Apparatus and method for forging a pinion with teeth closely to a - Google Patents

Abstract

The present invention relates to a die apparatus for forging a solid workpiece having a head portion and a shank portion within a forged gear having a head portion close to a network, said matrix apparatus comprising: (a) a first matrix and a second matrix, and being characterized in that the combination of said first and second matrix is selectively movable relative to one another, said first matrix having a notch with a negative cavity therein that corresponds to said head portion close to a net for forging said head portion, and (b) an axial limiting member provided in at least one of said first and second matrix, configured to help limit the axial movement of the forged gear. and to help remove the head portion close to a network of said negative cavity.

Description

APPARATUS AND METHOD FOR FORGING A PINION WITH TEETH CLOSELY TO A NETWORK TECHNICAL FIELD The present invention relates to an apparatus and method for producing pinions and more specifically to an apparatus and method for producing heads in a manner close to a network of spikes using the preceding operation and without the need Lf. work separately the layout of the notch and teeth.

BACKGROUND OF THE INVENTION The sprockets used in cars and trucks have generally been manufactured according to a process consisting of several stages that include forging, turning, unfinished coring and finishing. A piece of solid work is generally forged in its overall overall shape, as illustrated in Figure 1, (example 15) which is a model having a head in the form of a simple cone-core without teeth or notches For example, the effects of providing an arrangement or configuration of the tooth in the gear head, the model is turned in a contour and the notches are uncorrected in the head of the workpiece forged to the desired depth and An angle in the specialized gear cutting equipment. In certain processes, up to three separate insertion cuts are made to provide the desired configuration or arrangement of the tooth, such as the first and second face (e.g., the driving and sliding face) of the tooth, as well as the root of the grooved head. to provide the required geometry for a pinion. These previous methods have not been fully satisfactory since the work piece is much larger in volume before the forging than the finished sprocket, which requires higher undesirable costs in terms of heating and material. In addition, the machine cut of the teeth arrangement is an expensive and time-consuming operation. Previously, forging close to a network was available for spiral bevelled gears forged from a powder material, for example as described in the abstract of US Patent No. 4,050,283 (Schober). A gear manufactured in accordance with the teachings of this reference is significantly different from a forged gear of a solid hardstock workpiece. Generally, a forged gear using this process is manufactured from a non-solid metal powder and wax binder that is first poured into a matrix and compacted to create a briquette, which is then sintered to melt the wax and provide a metallurgical bond between the individual dust particles. A gear produced according to this method only has about 80% density compared to that of a forged gear in the form of a solid workpiece ingot, which significantly reduces the strength of the gear and as such, limits its use to low power applications, l or an electric appliance for the home or for the garden and lawn mowing equipment (for example garden tractors). The forging from an unmilled powder material does not provide the desired flow of the grit in the gear wheels, therefore the torque is not as strong as the gear or a forged gear from A single ingot of ha dst ck A need has arisen in the industry to provide an apparatus and method by means of which the material of the workpiece can be preserved and pinioned in a manner similar to a network and preferably a pinion of differential shank, can be manufactured or formed using a slab operation that greatly reduces the removal of the stock material without the subsequent stages of complete deep work of the individual notches to provide the desired tooth arrangement. Previously due to technical difficulties in the forging of the pinion tooth configuration, and then removing the head from a pinion of the matrix once it was e forged without damaging the tooth arrangement.

SUMMARY OF THE INVENTION It is the object of the present invention to provide a pineapple fabricated in close proximity to a network without the need for unfinished work of complete depth of the tooth arrangement. Another object of the present invention is to provide a pinion close to a network using presses already ex i st e t s. It is still another object of the present invention to reduce The energy costs and material manufacturing of a pinion. It is still another object of the present invention to provide a forged pinion with high precision by compressive forces. It is still another object of the present invention to provide an apparatus and method for manufacturing a sprocket of near-network form which are intended and overcome the aforementioned deficiencies in the slab industry. Other objects, advantages and features of the present invention will be mentioned below and will be apparent to those skilled in the art after examining the following or may be experienced with the practice of the invention. In order to achieve the aforementioned objects and other objects in accordance with the purpose of this patent, the present invention comprises a press or matrix apparatus for forging the head close to a network of a pinion of a workpiece. solid and includes a first matrix or upper matrix that has a negative cavity corresponding to the head close to a network for forging the head. In addition, the apparatus includes an axial limiting member configured to assist in the removal of the forged gear from the negative cavity after forging. In one embodiment, the axial limiting member may be provided in the second lower die or matrix and the inner surface of the rod die and the surface of the stem portion are configured to provide a resistance and / or friction to the surface sufficient to assist in the substantial limitation of the axial movement of the forged gear while allowing the forged gear to rotate so that the forged head leaves the negative cavity of the first die or upper die. Preferably, a support band, such as one or more depressions, may be provided on the inner surface of the stem matrix, and the material within the depression may be forced or "melted" to form a stem projection on the surface of the stem. the stem portion while the head is being forged. The depression may extend either around the entire periphery of the inner surface or a selected part, as desired. The resulting rod projection having a depth from about 0.0254 to about 0.0508 mm can provide sufficient surface drag and / or friction to assist in restricting or preventing substantial axial radial movement of the gear to assist or assist in the removal of the forged head from the negative cavity. In another embodiment, the axial limiting member is located or provided in the first matrix or upper matrix. A tooth cavity may have a hole and a bolt that slides in may selectively extend through the hole to maintain a socket with the forged head while the tooth cavity of the first matrix or upper die moves away relative to the second lower die or matrix, thereby preventing substantial axial movement of the forged pinion while allowing radial or rotary movement help in the removal of the forged pinion from the negative cavity. In practice, a press or die apparatus can be provided to forge the head of a solid workpiece within the configuration in a manner close to a network. While the head is being forged, an axial limiting member can be formed on the stem portion of the forged gear. To remove the forged head from the press without nicking or damaging the forged head, the axial movement of the forged gear is limited while the rotational or radial movement of the forged gear is allowed. In one embodiment, the surface and / or rod resistance of the forged gear and the inner surface of the rod die limit axial movement while allowing radial rotation movement. When the projection of the rod is provided or formed in the portion of the rod, it can be preferably removed from the portion of the rod while it is being expelled or otherwise properly withdrawn from the rod matrix. In another embodiment, the press or toothed array apparatus has a hole and a bolt that extends and slides selectively through the hole to engage with the head. Once the slab is complete, the toothed die moves away from the forged gear in relation to the second die, while the pin remains in contact or recessed with the head to limit or otherwise prevent axial movement of the forged gear while radial movement is allowed.

BRIEF DESCRIPTION OF THE DRAWINGS While the specification concludes with the claims highlighted particularly and which claim in a distinctive manner the present invention, it is understood that it will be better understood from the following description taken in conjunction with the accompanying drawings, in which: Figure 1 is a perspective view of a forged pinion of the prior art. Figure 2 is a partial cross-sectional view of a press incorporating an embodiment of the apparatus and method of the present invention, in which the left side illustrates the press in a closed position and the right side illustrates the press in an open position . Figure 3 shows a bottom view of a toothed matrix that has a cavity close to a network of an anaje. Figure 4fl is a perspective view of a shape of a forged pinion of shape close to a network. Figure 4B is a perspective view of a second embodiment of a pinion forged close to an r-e. Figure 5 is a partial cross-sectional view of a matrix apparatus incorporating an alternative embodiment of the present invention in which the left side illustrates the array apparatus in a closed position and the right side illustrates the apparatus of matrix in an open position; and Figure 6 is a perspective view of an ingot having a portion of stem that has been forged and a head that has not been forged.

DETAILED DESCRIPTION OF THE INVENTION Referring now to the numbers of the drawings in detail which similarly to the numerals indicate the same element through the views, Figure 2 generally represents a matrix or press apparatus indicated with numeral 20, which it can include any kind of press or matrix apparatus known in the industry used in forging operations such as a hydraulic, steam, steam, or mechanical press capable of applying a sufficient amount of force (for example about 500 to around 3000 tons or from around 4.5-106N to around- from 2.7-107N) in a single piece of work, depending on the size of the part. The array apparatus 20 includes a first matrix or upper mat 22 and a second matrix or lower matrix 80 which in the present invention are used together in a closed die forging operation. The first matrix 22 characterizes a toothed array 26, exemplified in Figure 2, which may be centered on a central ee 91 and which may have a plurality of tooth segments 28 and a negative cavity 27 (see Figure 3) that can forge the desired shape near a network of the head 92 of a gear 90, such as a pinion, and preferably a pinion of the differential rod q? e possesses a tooth configuration that can be spiral helical in shape, and which can include a plurality of tooth (for example 93) that are parallel to each other. A stencil die 30 is exemplified located on the toothed array 26 and may also be centered on the central axis 91 to assist in forging the upper surface 95 on the head 92 of the gear 90 with various indications, such as information or alpha / numbered designs. . Preferably, a center rnacho or a projection 31 can be centered on a stencil matrix 30 to allow the forging of a notch or female center 96 can be used in the later work operations or with the present invention to assist in the removal of the head (for example 192) from the toothed array (for example 126), as will be described in more detail. A centered support matrix 32 can be located on the stencil matrix 30 which can assist the stencil matrix 30 to forge the upper surface 95 of the head 92 with the female center 96 and / or any desired information. The first die 22 can also be provided with a guide piece 34 fixed along the central axis 91 which generally centers the upper tooling (for example, a serial matrix 30)., a support matrix 32 and a serrated die 26) in a matrix holder 40. The support of a matrix 40 may be a ring-shaped support substantially surrounding the notched die 26, the stoncil matrix 30 and the stiffening matrix 32 and collaborates to rigidly fix or secure these elements in the desired orientation or position. One or more die caps 42 can be used to hold the die holder 40 in place, and can be rigidly mounted to the die pad 44 by inserting a connector, such as a screw or bolt 43 for example, through? orifice 420 in the die cap 42 and within a hole 440 in the die pad 44. The top surface 400 of the die holder 40 should be substantially level with the bottom surface 44B of the matrix cloth 44 so that the toothed mat 26, the stencil matrix 3, the support matrix 32 and the guide member 34 remain fixed rigidly in place and preferably they can not rotate or otherwise move in relation to one another during the forging stroke, which is exemplified by arrow fl. With the present invention, assemblies and techniques known in the industry can be used to center and / or fix or secure the upper tooling (for example, stencil matrix 30, support matrix 32 and toothed matrix 26), if desired. The toothed array 26 and the etchant array 30 can preferably be removed, and replaced by another toothed array (for example, 26) or a stencil array (for example, 30) having a toothed con? Guration and spacing. different, information, or the absence of the male center 31. The flexibility to interchange the matrix and the stencil matrix (eg, 26 and 30) allows gears of different sizes, shapes and separations to be forged in the same apparatus of matrix 20 in a simple and economical way. The second die 80 is exemplified as including a rod die 82 having a rod cavity 84 which is generally configured to receive a rod portion 98 of a preformed compound 16, as exemplified in FIG. 6. The following specification contemplates that the shank portion 98 be forged before the head 92. The present invention also contemplates that the head 92 can be forged before or prior to the shank portion 90. The shank matrix 82 is configured to allow movement selective of the portion of rod 98 to assist in the removal of the head 92 of the serrated die 26 during the retraction stroke, or when the first die 22 moves away from the head 92, as exemplified by arrow "B" in ia Figure 2. The rod array 82 may have a number of sections with various diameters, as exemplified in the first portion 86, a second portion 87, and an array of sections. portion 88 of inner surface 85 in Figure 2, each having a different useful diameter that is generally configured to correspond to the shape and to cooperate with or hold on the portion of shank 98 of the preformed compound 16, and to assist in adjusting the pressure that can be applied to the stem portion 98. Generally, the diameter change in the region or transition area 81 between the portions (e.g., between the first portion 86 and the second portion). portion 87) is sudden or pronounced (ie, not gradual) and is also adapted and configured to dispose or hold the portion of rod 98 that had already been forged or that was previously forged. Alternatively, the rod array 82 can generally be cylindrical in shape, which is preferred if the rod portion 98 has not yet been forged.

In the method of the present invention for forging teeth in the form of a chain to a gear network or arrangement, and specifically in pinions with helical angles, the grooves forged in the head 92 between the teeth 93 may allow the first matrix 22 contacting or otherwise touching second matrix 80, causing damage or even failure to the first and / or second matrix 22 and 80. To help avoid or eliminate contact between the first and second matrix 22 and 80, respectively, during the forging stroke, the upper surface 83A of the rod array 82 may include a recess S3A around the outer portion of the upper surface 83 which cooperates in the formation of an annular projection 94 around the lower portion of the head 92 during the forging stroke, as exemplified in Figure 4B. Referring to Fig. 2 according to the present invention, an axial limiting member 99 is provided to assist in removing the forged head 92 from the cavity 27 of the tooth matrix 26. In an embodiment, a sufficient amount of strength and / or surface friction can be provided between the surface 98A of the rod portion 98 and the inner surface 85 of the rod array 82, so that the axial movement of the forged gear 90 can be substantially limited, still allowing the forged gear 90 to rotate or move in a radial direction whereby the teeth 93 generally begin to unscrew or otherwise disengage from the toothed die 26, thereby allowing the head 92 to disengage or be removed of the cavity 27 without nicking or otherwise damaging the teeth 93. The strength provided in the present invention should be sufficient so that the shank portion 98 is not removed (e.g., raised) from the rod cavity 84 while the first and the second matrix (22 and 80) separate (see arrow "B"). A preferred embodiment of the axial limiting number 99 of the present invention includes one or more supporting bands 39? other suitable devices or configurations that can be provided on the inner surface 85 to help prevent or substantially limit the axial movement of forged gear 90 after the head 92 has been forged, and while the first die 22 is retracted or otherwise it moves away from the second die 80. However, the fastener band 89 of the present invention allows radial or rotational movement of the forged gear 90 while the first die 22 retracts. The support band 89 may be a depression or other suitable indentation, nick or hollow portion on the inner surface 85 that extends around part of the inner surface 85, or may preferably extend 360 degrees around the inner surface 85. Alternatively , the support band 89 may include a number of suitable depressions (not shown) provided on the inner surface 85. The support band 89 only needs to be sufficiently deep and / or wide, so that the resultant stem projection 08B on The shank portion 98 cooperates in providing sufficient strength and / or surface friction between the shank portion 98 and the inner surface 85 of the shank matrix 82. A depth of about 0.01 to about 0 , 02 inches (0.254rnrn to 0.508mrn) and one length (or width) a Along the inner surface 85 from about 3, lnnm to about 12, / may be enough to pro to provide sufficient surface resistance and / or friction, to assist in the removal of the head 92 from the cavity 27. The support band 89 may preferably be placed adjacent or in close proximity to the transition area 81 where the diameter the inner surface 85 changes (for example near the first and second portions 86 and 87). While the support band 89 may be located at any point along the length of the inner surface 85, it is still preferred that the support band 89 be provided on the interior surface portion 85 with the largest diameter. large (e.g., first portion 86) to increase the strength (e.g., surface friction) and effectively prevent axial movement of the shank portion 98 of the rod die 32 while the first die 20 is retracted or it moves away in relation to the second track 80. In order to manufacture gear close to a net 90, several preforming steps can be carried out to provide a suitable solid preformed compound 16, as exemplified in FIG. 6. Generally, the gears manufactured by the techniques and methods of forging can be used in industrial applications or automotive high-power, and can be made from raw material rolled in hot Either turned barstock that can be ferrous or non-ferrous material. Preferably, the raw material can be low-grade alloy steel or carbon dioxide having a carbon content of about 0., 05% to about 0.5%, or preferably from about 2% to about 4%. Suitable illustrative examples used in the present invention include flISI (Omepcan Tron Steel Institute) 8620, 8625, 8822 or 4620. From raw materials and using techniques known in the industry, such as cutting or sawing, a work piece can be provided. individual, solid, which generally has a cylindrical shape. In the present invention, the volume of the solid workpiece should be suitably selected, and it can be cut to have a volume approximately equal to that of the cavity 27 and the rod cavity 84, including the support band 89 and the hollow 83A, since the present invention is preferably used in a closed matrix forging operation and involves said operation. The work piece can be coated or impregnated L7 with a lubricant, such as graphite, which helps to reduce the flow of metal along the surfaces of the toothed die 26, the stencil die 30 and the rod cavity 84 (for example, the inner surface 85 and the recess 830), which in turn, helps to reduce the possibility that the forged gear 90 adhere to the surfaces of the toothed die 26, the stencil die 30, or the rod cavity 84 after the blow of forge The solid workpiece can be forged using conventional forging techniques known to those skilled in the art, initially to provide the shank portion 98, which is exemplified in FIG. 6. After forging, the shank portion 98, the head 16A of the preformed compound 16 can be heated as quickly as possible in practice to a temperature of at least about 1300 ° F (700 ° C), and preferably from about 1600 ° F to about of 2000 ° C (850 ° C ~ 1100 ° C), to take advantage of or enhance the improved ductility and malleability of the metal at increased temperatures, and so that the shaped compound 16 is sufficiently malleable. In another embodiment, the entire workpiece (i.e. the head and stem part) can be heated concurrently, and can be forged in the same die or press apparatus (i.e., 20) in sequence, effectively eliminating in this way the need for extreme heating (eg, head 160) between forging strokes.

The formation or forging of a gear in a manner close to a network 90 according to the present invention can be achieved with the single stroke of the press 20, effectively reducing time consumption and costly precision work operations. The present invention can place the preformed compound 16, similar to that exemplified in FIG. 6, between the first and the second matrix (for example, 22 and 80), by inserting the portion of the rod 98 into the cavity of the rod 84. A lubricant within the rod cavity 84 of the rod boss 82 and the negative cavity 27 of the toothed die 26 prior to the forging stroke to help prevent the gear 90 from adhering or otherwise attaching to the inner surface 85 of the cavity 84 and the forging surface 280. While the first die 22 can generally be forced into the second die 80 in an axial direction, and preferably in a downward vertical direction, as indicated by the arrow " A ", the material of the head 16A can be pressed into the cavity 27, exemplified in Figure 3, to shape or forge the head 92 of a gear close to a network 90 which generally has the desired arrangement of a tooth or tooth configuration, which is exemplified in Figures 4 and 4B. The press or die apparatus 20 selectively applies a sufficient amount of force, such as from about 500 to about 3,000 tons (4.5 x 106 to 2.7 x 10? N) to the head 160 in a single stroke to forge or otherwise to shape the head 92, as exemplified in Figures 40-4B. While the first die 22 looses or otherwise shapes the head 92, some of the material of the stem part 98"melts" or otherwise flows down the support band 89 to form a rod projection 98B. The left side of Figure 2 exemplifies the press or die apparatus 20 in a closed position after completion of the forging portion of the bead to shape or otherwise manufacture the head 92 of the forged gear 90. In a subsequent manner, The first die 22 can be withdrawn selectively or away from the forged gear 90 relative to the second die 80, preferably moving away axially upwardly from the second die 80, as shown by the arrow "B" and shown in FIG. exemplifies on the right side of Figure 2. While the die 22 shrinks or moves away from the second die 80 (see arrow "B" in Figure 2) the axial limiting member 99 substantially limited the axial movement of the forged gear 90, and still allows the radial or rotational movement of the forged gear 90, whereby the teeth 93 are generally unscrewed or detached from the teeth 28 of the toothed matrix 26. After the head 92 detaches or is removed from the tooth. Another mode of the toothed array 26, an ejector rod (not shown) can help to remove or eject the rod portion 98"to the rod cavity 84. The rod projection 98B should have a width and a depth narrow enough so that the ejection rod can "calibrate" or otherwise remove the shank projection 98B while the shank portion 98 is being removed (e.g., ejected) "the shank matrix 84. i the surface of the resulting portion of the shank 98 is not smooth enough after it has been "calibrated" it is contemplated that this portion of the surface could be further worked, as desired or as needed. The edge 94 can be worked out of the head 92 or the other way removed using, for example, a lathe, and the surface of the forged gear 90, including the head 92 and / or the shank portion 98, can be polished or finished. in other mode using standard techniques and equipment in the industry. In Figure 5 an alternative embodiment of the present invention is exemplified to fabricate or shape (i.e., forge) the head close to a pinion network, and includes features and elements that are substantially identical to the corresponding features and elements. of figures 4B and 6. These essentially identical elements and features are designated using reference numbers of t is digits in which the last two digits correspond to the reference number used in figures 4B and 6. Accordingly, the specification of the press or matrix part 120 does not contain a redundant description of elements and features identical or similar to the elements exemplified in Figures 1 to 4B and 6. The axial limiting member 199 is located or placed "Jo in the first die 122 where the head 192 of the gear 190 can also be removed or otherwise unlocked from the tooth die. 126 substantially limiting the axial movement of the forged gear 190 while it is allowed to move in the radial or rotational direction. The first die 122 may include a toothed die 126 generally centered on the central axis 191 having one or more toothed segments 128. The toothed die 126 may also include a centered hole 129, which may be configured to allow the diagonal portion "Je a bolt 150, which may also be centered on a central axis 191, selectively to slide through a centered hole 129. The bolt 150 may be generally "T" shaped and may have a distal end of cylindrical shape and preferably may have a projection or center rnacho 150 (a) to assist in the forging of a female groove or hub 195 on the upper surface 195 of the head 192. A guide ring 152 is illustrated as being placed on the toothed matrix 126 and around the bolt 150 to help maintain the bolt 150 along the central axis 191 «jel gear 190. Placed between the guide ring 152 and the bolt 1 0, and on the toothed die 126 can there are one or more springs 154, preferably belleville springs, which can exactly coincide with the upper surface 125 of the toothed matrix 126 and the lower surface 133 of a matrix "e ring-shaped support 132. The adjustment ratio" je la support die 132 and the proximal portion of pin 150 could be contiguous to help prevent support beam 132 from moving axially relative to but not 150 during the retraction stroke of toothed array L26, as shown in FIG. exemplifies in the "or right" of Figure 5 by arrow "B". Placed on the guide ring 152 and the bolt 150 there can be a bolt-shaped bracket in the form of ring 148 with an internal hole 149 which includes a tapered portion 1490 and a non-tapered portion 149BThe non-tapered portion 149B is caliped and configured to allow the distal portion 1560 of a piston rod 156 to slide back and forth through the tapered portion 1490. Hydraulic seals 157 may be provided, such as 0-shaped rings, around the non-tapered portion 149B effectively to isolate the first portion 161B of the chamber 161 in the cylinder 160, and around the proximal portion 156B of the piston rod 156 pair-a, this way, effectively isolating in hydraulic form the first and second portions 161fl and 161B, respectively, of the chamber 161.

A ring-shaped die holder 140 is illustrated as cooperating with the toothed-matrix support 126, the guide-ring 152 and the supporting die of the bolt 148. While the cylinder 160 is exemplified in Figure 5 as a integral structure, it is contemplated that the cylinder 160 could comprise a number of individual parts or components connected or attached. Positioned around the cylinder 160 may be a cylinder housing 162 to assist carrying the forged load through the first mat 122, and specifically through a ring-shaped bolt support die 148 and the guide ring 152. to the notched die 126. The cylinder housing 162 may also help to reduce the effect that the forged load may have on the operations of the cylinder 160 and its chamber 161, the piston rod 156 and the operations "Jel bolt 150. During the blow forging portion, exemplified by the arrow "0" in Figure 5, the first portion IB of the chamber 161 can selectively be sufficiently preselected and the second portion 1610 of the chamber 161 selectively be sufficiently ventilated so that the bolt 150 can be placed in a retracted forged position, as exemplified on the left side of Figure 5. When the first die 122 begins to retract or move away rse in relation to the second matrix 180, as exemplified on the right-hand side of Figure 5, the member of? Axial limitation 199 cooperates substantially to avoid the axial movement of the forged gear 190. The second previously ventilated portion 1610 can be selectively constrained in sufficient manner and the first portion 161B can be selectively ventilated sufficiently for the rod piston 155 can maintain its axial position pressed against the upper surface of the bolt 150 or otherwise engage this and, preferably, the male center 1500 remains posi c? ona < in the cent or female 196. When the notched die 126 retracts in relation to the second die 180, the hydraulic pressure in the second chamber 1610 selectively may be sufficient to overcome the force of the springs 154 to assist maintaining the axial position of the piston rod 156 so that the bolt 150 can remain engaged with the upper surface 195 of the head 192 or "side" against it. When the toothed die 126 and other portions of the first die 122 are retracted or moved away from the second die 180, the forging gear may be limited or otherwise prevented from moving axially, however, the shank portion 198 of the gear 190 can be allowed to rotate in the array "Je rod 182 so that the head 192 can be removed" from the notched die 126 without nicking or otherwise damaging the teeth 193 on the forged head 192. Alternatively, a support band (eg, 89 in Figure 2) may also be provided on the rod die 182 to further assist in removing the head L92 from the toothed die 126. Having shown and described the modalities Preferred embodiments of the present invention, new adaptations of the apparatus and method for forging a gear as described herein can be achieved by appropriate modifications for someone skilled in the industry, without departing from the scope of the invention. nce of the invention. For example, the present invention has been described as having a first matrix 22 in motion while the second matrix 80 remains static. It is contemplated that the present invention may include a second matrix 80 that is in motion, while the first matrix 22 remains static. In addition, the present invention can be used to forge various types of gears, such as ring gears or pinions. Although the foregoing description requires that the shank portion 98 of the ingot be forged first, it is contemplated that the head 160 of the preformed compound 16 can be forged to provide the head 92 before "Jel forged" to the shank portion 98, or The forging of the head and the shank portion 98 of the preformed ingot can be achieved in the same die apparatus. Other potential modifications will be apparent to those skilled in the art. Accordingly, the scope of the present invention could be considered in terms of the following claims and is meant <It is not limited in the details, structure and operations shown as described in the memory "Jescriptive and di uos.

Claims (9)

NOVELTY OF THE INVENTION CLAIMS

1. - An improved die apparatus for forging a solid workpiece having a head and a portion of a rod within a forged gear having a shape head close to a network, said matrix apparatus comprising: (a) a first die and a second die, said first and second die being selectively movable relative to each other, said first die having a toothed die with a negative cavity therein, said head corresponding closely to a net for forging said die; and (b) an axial limiting member located in at least one of said first and second matrix, and configured to assist in removing the head in a shape close to a network of said negative cavity.

2. The device according to claim 1, further characterized in that said axial limiting member is configured to allow a radial movement < Said forged gear while the first die moves away relative to said second die.

3. The apparatus "matrix" according to claim 2, further characterized in that said second matrix comprises a stem matrix that has an interior surface, are "Jo said matrix" Je rod configured to receive said portion "Je rod" Of the solid workpiece, they possess a portion of a surface, such as a member, which has a structure configured to provide axial resistance between the surface of said stem portion and the surface. said inner surface.

4. The apparatus "matrix" according to claim 3, further characterized in that said member of 1 axial mutation comprises a support band including a depression formed in said inner surface to form a stem projection on said surface. of said portion of the rod.

5. The rna iz apparatus according to claim 4, further characterized in that said "Jepresion is e? Tien < Substantially around the entire periphery of said inner surface.

6. The device according to claim 4, further characterized in that said support band includes at least two depressions formed in said inner surface.

7. The device according to claim 4, said depression having a depth of about 0.254 nm to about "Je 0.508 nm.

8. The matrix apparatus according to claim 4, further characterized in that said rod array has "a number" of portions, with one of said portions having a different effective outer diameter, and said band of support being provided in the portion of the largest effective outer diameter. _. The apparatus according to claim 4 further comprises means for removing said rod projection. 10. The apparatus and matrix according to claim 1, further characterized in that said axial limiting member is provided in said first matrix. 11. The die apparatus according to claim 10, further characterized in that said first die has a serrated die with an opm, and a slidable pin that enters through said orifice, said press being selectively ex ten through said hole to substantially maintain the engagement against said first head "shape" close to a network while said toothed matrix moves away from said second matrix. 12. The matrix apparatus according to claim 1, characterized in that said limiting member is located in said first and second matrix. 13. An improved method for producing a forged gear that has a head "near a network and a portion of a rod" with a solid work, < Which comprises the steps of: (a) providing a press; (b) forge the head "He the piece" He works solid with said press inside "He the configuration near a network; and (c) removing said forged head from said press without damaging said forged head. 14. The method according to claim 13, wherein the stage further limits the axial movement of said forged gear allowing the radial movement of said forged gear. 15.- The method «Je conformity with the claim 13, further comprising the steps of: (d) providing a press having a first and a second matrix; and (e) applying a resistance to said portion of said shank gear to limit the axial movement of said forged gear allowing the movement of said forged gear rotation. 16.- The method «In accordance with the claim 14, which further comprises the step of: (d) providing a press having a first die and a second die, including said first die a toothed die having a hole and a selectively slidable pin disposable through the die. orifice; (e) engaging said bolt against said head of said forged gear; and (f) moving said toothed array away from said forged gear relative to said second matrix. 17. An improved method for producing a forged gear which has a head close to a network and a portion of a solid work, which comprises the steps to: provide: a matting apparatus possesses a first die and a second die, said second die having a rod die with a support band which is provided on the inner surface of said rod die; (b) forging the head close to a network of said piece "Work with said apparatus"; (c) forging-a rod projection on said stem portion; and (d) removing said head of form near a network of said mat i z apparatus 18.- The method according to the claim 17, which comprises the step of substantially limiting the axial movement of said forged gear while allowing radial movement of said forged gear. 1

9. The method according to claim 17, comprising the step of removing said forged gear from said second matrix. 20. The method according to claim 17, which comprises "the step" to remove the rod projection from the portion of the rod.