CN109807573A - The method with tooth bracket of molding - Google Patents

Abstract

The invention discloses a kind of method of the molding with tooth bracket, include: setting blank；Form hollow middleware to blank rotary press modelling, middleware has closed end, generally cylindrical ontology and an open end, and open end includes generally annular lip and the protruding portion that radially extends internally from lip and be connected with ontology；And circumferentially turning open end to remove annular lip and retain at least part protruding portion.

Description

The method with tooth bracket of molding

[technical field]

Present invention relates in general to method of the molding with tooth bracket, planetary gear in especially a kind of molding vehicle gear box The method of the shell of frame.

[background technique]

It include toothed bracket in vehicle gear box to transmit torque.For example, using toothed pinion frame shell Body transmits torque between the pinion frame claw shaped piece of planetary gear set and the gear ring of another planetary gear set.It is common Ground molds cup shell by flow forming and molding process, and utilizes numerical control mill (CNC Milling) or whirling mill (WERA Milling) technique is cut into tooth.Numerical control mill once cuts a tooth, and after forming a tooth, and workpiece rotation reprocessing is another A tooth；Therefore, numerical control mill efficiency is lower.And when whirling mill operation, workpiece and cutting tool rotate simultaneously to obtain continuous cutting Multiple teeth；However the at high cost and versatility of whirling mill is poor.

A kind of method for forming planetary gear claw shaped piece is disclosed in US patent publication US2007/0234570.Its Rotary press modelling is carried out to form the wall portion for having different-thickness to blank, and window is then formed in wall portion by bore process.

A kind of method for forming integral gear box component is disclosed in US patent publication US2006/0205560. It utilizes flow forming and molding process molded housing and the internal tooth positioned at enclosure interior.

[summary of the invention]

According to an aspect of the present invention, a kind of method of the molding with tooth bracket is disclosed, includes: setting blank, and it is right Blank rotary press modelling is to form hollow middleware.The middleware has closed end, generally cylindrical ontology and opens End；Wherein, open end includes generally annular lip and the protrusion that radially extends internally from lip and be connected with ontology Portion.This method also include circumferentially turning open end with remove annular lip and retain at least part protruding portion.

In one embodiment, protruding portion includes multiple circumferentially distributed protruding portions, and multiple protruding portion is connected to lip Inner surface is simultaneously separated from each other.

In one embodiment, turning open end includes so that middleware is rotated in a circumferential direction and making the outer of cutting tool contact lip Surface is to remove lip and generate gap between adjacent protruding portion.

In one embodiment, this method also includes machining at least part protruding portion.

In one embodiment, machining at least part protruding portion include turning at least part protruding portion with remove to Few a part of protruding parts are in a part of radially inner side.

In one embodiment, machining at least part protruding portion includes the inner surface of turning at least part protruding portion To form annular groove.

In one embodiment, machining at least part protruding portion include turning at least part protruding portion with remove to A part of protruding parts are in a part of its end to form inclined end face less.

In one embodiment, machining at least part protruding portion includes polishing at least part protruding portion with shape At smooth surface.

In one embodiment, this method also includes machining middleware to form opening.

In one embodiment, machining middleware includes the ontology of punching press middleware to form side in the side-walls of ontology Opening.

In one embodiment, machining middleware includes the closed end of punching press middleware to form end at closed end Opening.

In one embodiment, setting blank includes the circular blank for the thickness that setting has not less than 6mm.

In one embodiment, this method also includes machining blank to form opening.

In one embodiment, to blank rotary press modelling with formed hollow middleware include rotary press modelling circular blank with Form the ontology of the wall thickness with 2mm to 3mm.

In one embodiment, the outer diameter of the ontology of middleware is not more than the internal diameter of lip.

According to another aspect of the present invention, a kind of method of the molding with tooth bracket is disclosed, includes: setting round billet Material, and rotary press modelling circular blank is to form generally cylindrical hollow middleware.The middleware has closed end, generally Cylindrical ontology and open end；Wherein open end includes generally annular lip and radially extends internally from lip Multiple discretely circumferentially distributed protruding portions, relative to ontology, radially prominent and ontology outer diameter is not more than lip The internal diameter of the lip.This method also includes turning open end, including so that middleware is rotated in a circumferential direction and cutting tool is made to contact ring The outer surface of shape lip forms multiple tooth-shape structures to remove entire annular lip and retain multiple protruding portion.

In one embodiment, the inner surface that protruding portion extends internally from lip is more than the inner surface of ontology；This method into One step includes machining multiple tooth-shape structures to form multiple teeth, and machining multiple tooth-shape structures includes the multiple tooth-shape structures of turning With remove tooth-shape structure more than a part of ontology radially inner side the inner surface of multiple teeth is flushed with the inner surface of ontology with Form smooth inner surface.

In one embodiment, machining multiple tooth-shape structures further comprises the interior of the multiple tooth-shape structures of circumferentially turning Surface is to form annular groove.

In one embodiment, machining multiple tooth-shape structures further comprises the multiple tooth-shape structures of turning to remove tooth form Structure is located at a part of its end to form inclined end face.

In one embodiment, machining multiple tooth-shape structures further comprises that multiple tooth-shape structures of polishing are smooth to be formed Surface.

One or more embodiment according to the present invention molding is low with the method manufacturing cost of tooth bracket and manufacture efficiency It is high.

It should be understood that providing above-mentioned brief description for being introduced into will further describe in detailed description in simplified form A series of selections concept, do not mean that the crucial or basic feature for confirming protected present subject matter, this hair Bright range will uniquely be defined by claims hereof.In addition, the theme protected is not limited to overcome above or this theory The embodiment of any disadvantage described in any part in bright book.

Individually or the one or more embodiments being described below in detail are read in conjunction with the figure, one or more of the invention is special Sign and/or advantage will be evident.

[Detailed description of the invention]

One or more embodiments for a better understanding of the present invention are tied by way of example in present specification It closes attached drawing and specific embodiments of the present invention is described in further detail, in which:

Fig. 1 schematically illustrates the molding of one or more embodiments according to the present invention with the method for tooth bracket.

Fig. 2 schematically illustrates the method for one or more embodiments according to the present invention for forming the base with tooth bracket Material.

Fig. 3 A schematically illustrates the method rotary press modelling of the one or more embodiments according to the present invention of blank shown in Fig. 2 The first middleware afterwards.

Fig. 3 B schematically illustrates the sectional view of A-A along the first middleware shown in Fig. 3 A.

Fig. 4 is the schematic diagram according to the second middleware after the machining of the method for one embodiment of the invention.

Fig. 5 is to be illustrated according to schematic diagram Fig. 6 of the third middleware after the machining of the method for one embodiment of the invention Property show the molding band tooth bracket of method institute of one or more embodiments according to the present invention.

[specific embodiment]

As needed, specific embodiments of the present invention are disclosed in present specification；It is, however, to be understood that being disclosed Embodiment be only that can pass through the example of the invention that a variety of, alternative form is implemented.Attached drawing is not necessarily to scale；It can be with Some features are expanded or shunk to show the details of particular elements.Same or similar appended drawing reference can indicate identical parameters and portion Part or modifications and substitutions object similar therewith.In the following description, multiple behaviour are described in multiple embodiments of conception Make parameter and component.These specific parameters and component only are not meant to limit as example in the present specification.Therefore, Specific structure and function details disclosed in this specification should not be construed limitation, and be only used for instructing skill in the art Art personnel implement representative basis of the invention in a variety of forms.

In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time The orientation or positional relationship of the instructions such as needle ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of The description present invention and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with spy Fixed orientation construction and operation, therefore be not considered as limiting the invention.

Fig. 1 schematically shows method 100 of the molding with tooth bracket of one or more embodiments according to the present invention.Side Method 100 includes setting blank 110, and hollow middleware 120 is then formed to 110 rotary press modelling of blank.Wherein, the middleware 120 ontology 124 and open end 126 with closed end 122, generally cylindrical.Open end 126 includes generally annular Lip 127 and the protruding portion 128 extended radially inwardly from lip 127, and protruding portion 128 is connected with ontology 124.Method S100 It further include turning open end 126 to remove annular lip 127 and retain at least part of protruding portion 128.

Specifically, at step S110, method 100 provides substantially blank 110, and can place it in for being spun into At the core model of type.Fig. 2 is schematically illustrated for forming the blank 110 with tooth bracket.Blank 110 can be almost circular base Material.As shown, blank 110 can be as general as circular plate for the section with certain thickness h1.In one embodiment, Medium carbon steel can be used in blank 110.Certainly, as needed, other alternative materials can also be used.The thickness h 1 of blank 110 can root Selected according to the demand of gearbox or pinion frame, for example, not less than 4mm, not less than 6mm or not less than 8mm etc.. In some embodiments, the thickness h 1 of blank 110 can be suitable with the thickness of closed end 122 with tooth bracket.Blank 110 can pass through Any appropriate method molding, such as punching press.In the illustrated embodiment, blank 110 may include central opening 138.

Then, at step S130, using rotary press modelling turned blank 110 to form middleware 120.In some embodiments In, the first middleware 120 formed via step S130 is as shown in Fig. 3 A, 3B.Middleware 120 can be hollow overall cylindrical Structure, and may include closed end 122, ontology 124 and open end 126.

Closed end 122 refers to the end with bottom wall (end wall).In one embodiment, the closing of middleware 120 End 122 includes the end wall of entity.It is other for connecting that the bottom wall of entity can mold multiple openings in subsequent procedure of processing Component.In other embodiments, opening, bumps can also be formed on blank in the way of punching press etc. before rotary press modelling step Etc. shapes.In this way, closed end 122 includes having central opening as shown in Figure 3A in the middleware 120 made of rotary press modelling 138 bottom wall.Closed end 122 can have the thickness substantially the same with blank 110, such as 6mm.

With continued reference to Fig. 3 A to 3B, ontology 124 is substantially hollow cylinder.In other words, ontology 124 is along perpendicular to it Axis A can have the cross section of substantially circular ring shape.One end of ontology 124 is connected with the periphery of closed end 122, and along axis A extends.For purpose of explanation, the side wall 123 of ontology 124 is shown as extending vertically from closed end 122 in figure.In other implementations In scheme, as needed, the side wall 123 of ontology 124 can also have other angles, such as 60 degree, 75 relative to closed end 122 Degree, 105 degree, 120 degree etc..Similarly, in various embodiments side wall 123 relative to closed end 122 can also have it is certain fall Angle (not shown) is to form smooth transition.In one or more embodiments, 124 side wall of ontology obtained by rotary press modelling 123 thickness h 2 can be less than the thickness h 1 of blank 110.For example, the side wall 123 of ontology 124 can have the thickness of 2mm to 3mm. In this way, when carrying out such as punching press aperture to the side wall 123 of ontology 124 in subsequent procedure of processing, since wall thickness is lower, drop The low difficulty of stamping procedure.In other embodiments, the wall thickness h2 of ontology 124 also can be equal to or greater than blank 110 thickness h1.It should be understood that although ontology 124 is shown as cylindrical in figure, ontology 124, which also has, in other embodiments is incrementally increased Radius is to form bowl-type or clock hull shape.

Referring to Fig. 3 B, the open end 126 of middleware 124 includes the lip 127 and protruding portion 128 of annular.Wherein, lip 127 can form the circular ring shape shown in Fig. 3 A generally.Relative to ontology 124, lip 127 can radially B be outwardly protruded.Specifically Ground, it is the internal diameter of R2 that lip 127, which can have size, i.e. the radius of the inner surface 121 of lip 127 can be R2.Correspondingly, ontology 124 can have size for the outer diameter of R1, i.e. the radius of the outer surface 125 of the side wall 123 of ontology 124 can be R1.Wherein, ontology 124 outer diameter R1 is not more than the internal diameter R2 of lip 127.In one embodiment and as shown in Figure 3B, R1 is less than R2.In other words, Radially B can have clearance C between the inner surface 121 of lip 127 and the outer surface of ontology 124.In this way, in institute as follows State and be turned after lip 127, the radial outside of protruding portion 128 can have biggish processing space, can as needed and cut Ream enough redundancy sections.In another embodiment, according to processing or forming needs, R1 can have identical with R2 big It is small；In other words, clearance C can be substantially zero.

From lip 127, radially B's protruding portion 128 extends internally.As shown in the figure, protruding portion 128 is connected with ontology 124. In this way, after being turned lip 127 at step S170 as described below, at least part of the protruding portion 128 retained The connection with ontology 124 can be kept, and thereby is processed into the tooth 129 of bracket 140 in subsequent handling.One or more real It applies in example, protruding portion 128 can be multiple, and can be dispersedly distributed circumferentially.For example, in the embodiment as shown in fig. 3 a, it is open End 126 has eight protruding portions 128a, 128b, 128c, 128d, 128e, 128f, 128g, 128h.These protruding portions are circumferentially equal Even distribution is simultaneously spaced from each other.Multiple protruding portions being dispersedly distributed it is final be processed be shaped to tooth after, be capable of providing and its The steady engagement of its component such as gear ring.In another embodiment, according to the design of matching other components, open end 126 can also only have a protruding portion.

For simplicity, the company in the sectional view shown in Fig. 3 B, between lip 127, protruding portion 128 and ontology 124 It connects position and is shown as right angle.It should be understood that in various embodiments, it can also between lip 127, protruding portion 128 and ontology 124 Inclined-plane (as schematically shown in Fig. 5) or chamfering (not shown) are molded to form smooth transition.

Optionally, at step S150, method 100 can machine the first middleware 120 further to form multiple openings. For example, the first middleware 120 can be placed on mold and it is processed for example, by Sheet Metal Forming Technology with cutter, thus It is formed at closed end 122 open-ended.For example, caning be processed central opening 138 after gearbox is completed with reference to Fig. 4 It is passed through for transmission shaft (not shown)；Or also can be processed welding opening 137 in further manufacturing process with claw shaped piece Weld together.Certainly, other machining modes can also be used for example to drill etc. to form one or more openings to form the Two middlewares 120 '.

Alternatively, as it was noted above, base can also be machined by modes such as punching press, drillings before rotary press modelling step Material 110 is to mold open-ended 137 and/or 138 etc..In this way, the closing of the middleware 120 obtained by rotary press modelling process Hold the opening at 122 without separately formed after rotary press modelling step.The advantages of this mode, is without designing and provide Dedicated for the stamping die of forming open 137 and/or 138, processing cost is reduced.

In another example, with further reference to the second middleware 120 ' of Fig. 4.At step S150, method 100 can also be Side opening 136 is formed on the side wall 123 of the ontology 124 of middleware 120 for example to install pinion gear (not shown).In other realities It applies in scheme, other bore process can also be used and carry out forming open.

Fig. 1 is returned to, then at step S170, the first middleware 120 can be further processed by turning process in method 100 To remove the annular lip 127 for being entirely located at open end, and retains protruding portion 128 or retain a part of protruding portion 128.This Retained at least part protruding portion 128 can be processed then to obtain tooth 129 in sample.

Specifically, at step S170, method 100 may include making middleware 120 around axis A weeks using fixture (not shown) To rotation, while making turning cutting tool from the outer surface 142 of the external contact lip 127 of middleware 120, and with turning process Gradually inwardly promote, finally gets rid of entire annular lip 127 and optionally the one of removal 128 radial outside of protruding portion Part simultaneously generates gap 130 between protruding portion 128.That is, the multiple at least part protruding portions 128 retained form tooth-shape structure 128'.After step S170, method forms the third middleware 120 " with tooth-shape structure, as shown in Figure 5.In certain situations Under, if it is possible to enough turning accuracies are provided, the part of the protruding portion 128 retained or tooth-shape structure 128 ' can be directly as Final tooth simultaneously cooperates with other components without further processing.In other words, third middleware 120 " can be final band tooth Bracket.

Relative to traditional in such a way that numerical control mill is come molding gear, turning process is more efficient；And relative to whirling mill, Turning process has biggish cost advantage.

Due to removing only lip 127, and at least part of protruding portion 128 is able to retain and forms tooth-shape structure 128 ', During following process, tooth-shape structure 128 ' can be processed to mold final tooth 129.

Optionally, at step S190,128 ' further progress of tooth-shape structure is machined.For example, method 100 may include The multiple tooth-shape structures of turning.In this way, being capable of forming final tooth 129 by machine-cut tooth structure 128 '.

For example, with reference to Fig. 3 B, protruding portion 128 may include the first part 131 positioned at its radially inner side.In step S190 Place, method 100 are turned the first part 131 of protruding portion 128 or tooth-shape structure 128 '.As shown in the figure, it can be turned described Multiple tooth-shape structures 128 ' be more than the ontology radially inner side a part make the inner surface 144 of the multiple tooth 129 with The inner surface 145 of the ontology is flushed to form smooth inner surface.It alternatively, in another embodiment, can also turning Fall the multiple tooth-shape structure 128 ' and be located at a part of radially inner side to make tooth 129 itself that there is smooth inner surface, and nothing It need to be flushed with the inner surface of ontology.This is especially beneficial in the case where rotary press modelling precision is not high, because being obtained by rotary press modelling To the inner surface of protruding portion 128 may have rough surface.

It in some embodiments, at step S190 further include circumferentially be turned tooth-shape structure 128 ' referring to Fig. 3 B Two parts 132 mold card collar groove 133 with the inner surface in tooth 129.One embodiment of card collar groove 133 is shown in FIG. 6. In various embodiments, card collar groove 133 can have multiple section shape, such as rectangle (referring to Fig. 3 B), triangle as needed (referring to Fig. 6), trapezoidal, arch etc..It should be understood that since bracket 140 can have multiple teeth 129 being dispersedly distributed, card collar groove 133 It can also be made of multiple segments on different teeth.Although these segments have phase relative to axis A including multiple segments Same axial position.In this way, multiple segments are formed using single turning process, to have lower manufacturing cost, simultaneously The card collar groove 133 that can ensure to process matches with retainer ring (not shown).Although card collar groove 133 is shown as forming in the accompanying drawings First part 131 is being eliminated at the inner surface 144 that is formed, in other embodiments, can not also remove first part 131 And the shaping clasp slot directly on protruding portion 128.

In another embodiment, protruding portion 128 may also include the Part III 134 positioned at its axial end.By in step Rapid S190 is turned this Part III 134, can mold as needed a variety of patterns in the axial end portion of tooth 129, such as incline Oblique end face, plane, step surface, groove etc..Fig. 6, which is shown, has inclined-plane 135 on tooth 129.Similarly, single turning can also be passed through Come the Part III being turned in multiple protruding portion 128.

It should be understood that protruding portion 128 or tooth-shape structure 128 ' can be turned at step S190 as needed positioned at other The part of position.In addition, the other way other than the turning such as plane, milling, mill, brill, boring can also be used to machine protruding portion 128. For example, in certain embodiments, the obtained protruding portion of rotary press modelling may not be able to meet accuracy requirement.Therefore, to protruding portion 128 machining may also comprise polishing protruding portion 128 to provide more smooth surface.

For purpose of explanation, in this example, the turning process of step S190 is arranged after step S170.In other realities It applies in mode, step S190 can also be first carried out, protruding portion 128 is processed, execute step S170 again then to be turned lip 127。

The method of molding of the invention with tooth bracket processes the middleware that rotary press modelling obtains using turning process And toothed bracket is obtained, without the lower numerical control mill of efficiency or high-cost whirling mill, provide a kind of low cost The method with tooth bracket of molding.

As this specification is stated, the present invention provides a kind of form with tooth bracket by one or more embodiments Method.It should be understood, however, that those of skill in the art can be variously changed these specific embodiments, modifications and variations The spirit and scope limited without departing from the claims in the present invention.Any process described otherwise above in flow chart or herein Or method description is construed as, and can not press sequence shown or discussed, including according to related function by basic Mode or in the opposite order simultaneously, Lai Zhihang function, this should be by the embodiment of the present invention those of skill in the art Member is understood.

Point out in claim is considered as novel and non-obvious specific combination and sub-portfolio.These power Benefit requires to can be related to "one" element or " first " element or similar characteristics.Such claim is construed as including One or more this elements, both neither requiring nor excluding two or more this elements.The feature of description, function, element and/ Or other combinations of characteristic can be by the modification to current claim or by the application or related Shen to sub-portfolio Please in propose and advocate right.Such claim, no matter its is not wider, narrower compared with former claim, equally or not Together, it is all considered as being included in subject of the present invention.

Claims (20)

1. a kind of method of the molding with tooth bracket, includes:

Blank is set；

To the blank rotary press modelling to form hollow middleware, the middleware has closed end, generally cylindrical Ontology and open end, the open end include generally annular lip and radially extend internally from the lip and with The connected protruding portion of the ontology；And

Circumferentially open end described in turning is to remove the lip of the annular and retain at least part protruding portion.

2. described more according to the method described in claim 1, wherein the protruding portion includes multiple circumferentially distributed protruding portions A protruding portion is connected to the lip inner surface and is separated from each other.

3. according to the method described in claim 2, wherein open end described in the turning includes that the middleware is made to rotate in a circumferential direction And cutting tool are made to contact the outer surface of the lip to remove the lip and generate gap between adjacent protruding portion.

4. according to the method described in claim 1, also including: machining at least part protruding portion.

5. according to the method described in claim 4, wherein, machining at least part protruding portion includes described in turning At least part protruding portion is to remove at least part protruding parts in a part of radially inner side.

6. according to the method described in claim 4, wherein, machining at least part protruding portion includes described in turning The inner surface of at least part protruding portion is to form annular groove.

7. according to the method described in claim 4, wherein, machining at least part protruding portion includes described in turning At least part protruding portion with remove at least part protruding parts in its end a part to form inclined end face.

8. according to the method described in claim 4, wherein, machining at least part protruding portion includes described in polishing At least part protruding portion is to form smooth surface.

9. according to the method described in claim 1, also comprising machining the middleware to form opening.

10. according to the method described in claim 9, wherein the machining middleware include the ontology of middleware described in punching press with Side opening is formed in the side-walls of the ontology.

11. according to the method described in claim 9, wherein the machining middleware includes the closed end of middleware described in punching press It is open-ended to be formed at the closed end.

12. according to the method described in claim 1, wherein the setting blank includes that setting has the thickness for being not less than 6mm Circular blank.

13. according to the method for claim 12, also comprising machining the blank to form opening.

14. according to the method for claim 12, wherein it is described to the blank rotary press modelling to form hollow middleware The ontology of the wall thickness with 2mm to 3mm is formed including circular blank described in rotary press modelling.

15. according to the method described in claim 1, wherein, the outer diameter of the ontology of the middleware is interior no more than the lip Diameter.

16. a kind of method of the molding with tooth bracket, includes:

Circular blank is set；

Circular blank described in rotary press modelling to form generally cylindrical hollow middleware, the middleware have closed end, Generally cylindrical ontology and open end, the open end include generally annular lip and radially from the lip Multiple discretely circumferentially distributed protruding portions that portion extends internally, the lip are radially protruded relative to the ontology And the outer diameter of the ontology is not more than the internal diameter of the lip；And

Open end described in turning, wherein turning open end includes so that the middleware is rotated in a circumferential direction and making described in cutting tool contact The outer surface of annular lip forms multiple tooth-shape structures to remove the entire annular lip and retain the multiple protruding portion.

17. according to the method for claim 16, wherein the protruding portion is more than from the inner surface that the lip extends internally The inner surface of the ontology；The method further includes machining the multiple tooth-shape structure to form multiple teeth, the machine Processing multiple tooth-shape structures includes that the multiple tooth-shape structure of turning is inside more than the ontology diameter to remove the tooth-shape structure A part of side flushes the inner surface of the multiple tooth with the inner surface of the ontology to form smooth inner surface.

18. according to the method for claim 17, the multiple tooth-shape structures of machining further comprise circumferentially turning institute The inner surface of multiple tooth-shape structures is stated to form annular groove.

19. according to the method for claim 18, the multiple tooth-shape structures of machining further comprise that turning is the multiple Tooth-shape structure is located at a part of its end to remove the tooth-shape structure to form inclined end face.

20. according to the method for claim 19, wherein the multiple tooth-shape structures of machining further comprise described in polishing Multiple tooth-shape structures are to form smooth surface.