Hub manufacturing system

Abstract

The utility model provides a hub manufacturing system, which comprises spoke manufacturing equipment, rim manufacturing equipment and hub manufacturing equipment, and can be used for manufacturing composite hubs with spokes and rims made of different materials. Due to the fact that the spoke manufacturing equipment is provided with the spoke outer circle turning device, the periphery of a die-cast spoke workpiece can be turned, the roundness of the periphery of the spoke workpiece can be improved, the spoke workpiece can be better matched with a rim, and the risk that the rim is torn and loses efficacy when stressed is reduced. Due to the fact that the spoke manufacturing equipment is provided with the spoke finishing device, the outer surface of the spoke workpiece can be automatically subjected to finish machining, burr removal and other surface defects, the appearance of the composite hub is more attractive, and particularly, the spoke finishing device comprises an insert surface treatment mechanism. The casting material thin layer attached to the outer surface of the insert embedded in the outer end of the spoke of the spoke can be removed, so that the casting material thin layer can be prevented from influencing the welding quality when the spoke and a rim are welded subsequently, and the welding strength is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of wheel hub manufacturing, and in particular relates to a wheel hub manufacturing system. Background Art

[0002] At present, there are many types of electric vehicle and motorcycle wheel hubs on the market, one of which is a composite wheel hub, whose spokes and rims are made of different materials, for example, the rim is made of iron, the spokes are made of aluminum alloy, and the outer periphery of the spokes is embedded with iron inserts and welded to the rim through the inserts to form a whole. Such composite wheel hubs have beautiful appearance and lower cost than pure aluminum alloy wheels, and higher edge strength, so they have been widely used. The existing composite wheel hubs of this type are manufactured by corresponding manufacturing systems. The existing manufacturing systems have some shortcomings, which lead to some shortcomings of the manufactured composite wheel hubs: first, due to mold size margins and other reasons, a thin layer of aluminum alloy is usually attached to the surface of the inserts in the aluminum alloy spokes manufactured by die casting. During welding, the presence of this thin layer will affect the welding quality, and then affect the bonding strength between the spokes and the rim, bringing safety hazards during use; second, such composite wheel hubs are subject to thermal expansion and contraction during welding, and the dimensional accuracy of the outer ring of the rim is affected, which leads to axial swing when the wheel rotates, affecting the user's driving experience and also bringing certain safety hazards.

[0003] In addition, existing manufacturing systems usually do not have automated equipment that can automatically perform surface finishing on spokes, especially details such as the spoke sides, which are generally still manually ground and polished, with low processing efficiency. Due to the complex surface structure, manual grinding and polishing can easily cause surface defects or cause worker injuries.

[0004] Therefore, in order to further improve the user's driving experience and improve driving safety, a new type of composite wheel hub with higher spoke-rim bonding strength and higher rim size accuracy is needed. Accordingly, in order to be able to produce this new type of composite wheel hub on a large scale and efficiently, a corresponding new manufacturing system is also needed. Utility Model Content

[0005] The utility model is designed to solve the above problems and aims to provide a hub manufacturing system capable of manufacturing a composite hub with higher spoke and rim bonding strength and higher rim size accuracy. The utility model adopts the following technical solutions:

[0006] The utility model provides a hub manufacturing system for manufacturing a composite hub, characterized in that it comprises: a spoke manufacturing device for manufacturing a spoke with an insert embedded at the end of each spoke; a rim manufacturing device for manufacturing a rim workpiece; and a hub manufacturing device for combining the spoke with the rim workpiece to obtain the composite hub, wherein the spoke manufacturing device comprises: a die-casting device for die-casting a casting to manufacture a spoke workpiece; a spoke outer circle turning device for turning the outer circumference of the spoke workpiece to improve the roundness of the outer circumference of the spoke workpiece; and a spoke outer circle turning device for turning the outer circumference of the spoke workpiece to improve the roundness of the outer circumference of the spoke workpiece; and a spoke outer circle turning device for turning the outer circumference of the spoke workpiece to improve the roundness of the outer circumference of the spoke workpiece. A finishing device is used to finish the surface of the spoke workpiece, and the spoke finishing device includes an insert surface treatment mechanism for removing the thin layer of the casting attached to the outer surface of the insert. The rim workpiece does not have a rim structure. The hub manufacturing equipment includes: a press-fit welding device for arranging the spoke on the inner ring of the rim workpiece and welding the insert to the rim workpiece to obtain a hub workpiece; and a rim shaping device for spinning the rim workpiece part of the hub workpiece to form the rim structure on the rim workpiece part.

[0007] The wheel hub manufacturing system provided by the utility model may also have such technical features, wherein the outer end portion of each of the spokes has an arc-shaped end face, the spoke outer circle turning device is used to turn multiple of the arc-shaped end faces, and the spoke finishing device also includes: a surface polishing mechanism for grinding and polishing the outer end face of the spoke; and a detail polishing mechanism for grinding and polishing the details of the spoke.

[0008] The wheel hub manufacturing system provided by the utility model may also have such technical features, wherein the insert surface treatment mechanism is a rotary milling cutter, the outer end face of the spoke includes the side surfaces facing adjacent spokes, and the surface polishing mechanism includes a flying wing wheel for grinding and polishing the side surfaces.

[0009] The wheel hub manufacturing system provided by the utility model may also have such technical features, wherein the surface polishing mechanism also includes: a driving motor, a driving wheel, a contact wheel, a tensioning wheel, a tensioning driving cylinder and a sanding belt, the driving wheel is coaxially connected to the output end of the driving motor, the sanding belt is sleeved on the driving wheel, the contact wheel and the tensioning wheel, and the tensioning driving cylinder is used to drive the tensioning wheel to move in a direction away from the driving wheel, thereby tensioning the sanding belt.

[0010] The wheel hub manufacturing system provided by the utility model may also have such technical features, wherein the spoke is an aluminum alloy spoke embedded with the insert, the details of the spoke include the intersections of adjacent spokes and the corners of the hollowed-out parts of the spokes, and the detail polishing mechanism is a radial floating file machine for grinding and polishing the intersections and the corners.

[0011] The hub manufacturing system provided by the utility model may also have such technical features, wherein the spoke outer circle turning device includes: a rotating unit, used to assemble the spoke workpiece and drive the spoke workpiece to rotate; a slide, which can be movably arranged on one side of the rotating unit along the axial direction of the spoke workpiece assembled on the rotating unit; a slide driving mechanism, used to drive the slide to move; a turning tool assembly, which can be movably arranged on the slide along the radial direction of the spoke workpiece assembled on the rotating unit, and has a turning tool for turning the arc-shaped end face of the spoke workpiece; and a turning tool driving mechanism, used to drive the turning tool assembly to move.

[0012] The hub manufacturing system provided by the utility model may also have such technical features, wherein the spoke manufacturing equipment also includes a spoke forming mold, which is arranged on the die-casting device and is used to inject the casting for die-casting to form the spokes, and the spoke forming mold includes a movable mold and a fixed mold, and the movable mold has a plurality of spoke forming grooves for forming the spokes, and the spoke forming grooves have insert positioning grooves for placing the inserts and positioning the inserts during the die-casting process, and the middle part of the fixed mold has a runner hole. When the mold is closed, the spoke forming groove is connected to the runner hole, and the insert positioning groove has a lateral opening, and its opening direction is toward the middle part of the movable mold.

[0013] The wheel hub manufacturing system provided by the utility model may also have such technical features, wherein the insert is a curved sheet-like piece having an arc-shaped bottom surface and an arc-shaped and convex end surface, and the end surface has a plurality of through holes, the bottom of the insert positioning groove is located at the bottom of the spoke forming groove body, the bottom of the insert positioning groove has a shape corresponding to the bottom surface of the insert, a groove wall on one side of the insert positioning groove has an insert matching sub-groove corresponding to the end surface of the insert, and a groove wall on one side of the insert positioning groove also has a plurality of mating protrusions corresponding to the through holes, formed in the insert matching sub-groove.

[0014] The wheel hub manufacturing system provided by the utility model may also have such a technical feature, wherein the fixed mold has a plurality of spoke forming matching grooves, which are respectively used to cooperate with the plurality of spoke forming grooves of the movable mold to form a spoke forming cavity, and in the thickness direction of the movable mold and the fixed mold, the distance from the bottom of the insert positioning groove to the bottom of the spoke forming matching groove corresponds to the overall height of the insert.

[0015] Function and effect of utility model

[0016] According to the wheel hub manufacturing system of the utility model, it includes a spoke manufacturing device, a rim manufacturing device and a hub manufacturing device, and can manufacture a composite wheel hub with different spoke and rim materials. Among them, since the spoke manufacturing device has a spoke outer circle turning device, it can turn the outer periphery of the die-cast spoke workpiece, so that the roundness of the outer periphery of the spoke workpiece can be improved, so that it can better match the rim, and reduce the risk of rim tearing failure when subjected to force. In addition, since the spoke manufacturing device also has a spoke finishing device, it can automatically finish the outer surface of the spoke workpiece, remove burrs and other surface defects inevitably generated by die casting, and make the appearance of the composite wheel hub more beautiful. In particular, the spoke finishing device includes an insert surface treatment mechanism, which can remove the thin layer of casting material attached to the outer surface of the insert embedded in the outer end of the spoke of the spoke, so that the thin layer of casting material can be avoided from affecting the welding quality when the spoke and the rim are welded later, and the welding strength is guaranteed. Furthermore, since the rim workpiece manufactured by the rim manufacturing equipment does not have a rim structure, and the hub manufacturing equipment has a rim shaping device for spinning and shaping the rim part and processing the rim structure, the rim can be shaped after the spokes and the rim are welded to eliminate the influence of thermal expansion and contraction during welding on the rim size accuracy, thereby further improving the dimensional accuracy of the composite hub. By using such a composite hub in electric vehicles or motorcycles, users have a better driving experience and safer driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a block diagram of a wheel hub manufacturing system in an embodiment of the utility model;

[0018] Figure 2 It is a structural exploded view of the spoke forming die in the embodiment of the utility model;

[0019] Figure 3 It is a three-dimensional diagram of the movable mold in the embodiment of the utility model;

[0020] Figure 4 It is a three-dimensional diagram of the fixed mold in the embodiment of the utility model;

[0021] Figure 5 yes Figure 3 A magnified view of the part inside the middle circle A;

[0022] Figure 6 is a three-dimensional diagram of an insert in an embodiment of the utility model;

[0023] Figure 7 is a cross-sectional view of a spoke forming die with an insert placed therein in an embodiment of the utility model;

[0024] Figure 8 yes Figure 7 Enlarged view of the inner part of the middle circle C;

[0025] Fig. 9 It is a three-dimensional diagram of the spoke car outer circle device in the embodiment of the utility model;

[0026] Fig.10 yes Fig. 9 Enlarged view of the part inside the middle circle D;

[0027] Fig.11 It is a three-dimensional diagram of the turning tool assembly in the embodiment of the utility model;

[0028] Fig.12 is a three-dimensional diagram of a spoke finishing device in an embodiment of the utility model;

[0029] Fig.13 It is a stereoscopic view of the spoke finishing device at different angles in the embodiment of the utility model;

[0030] Fig.14 It is a three-dimensional diagram of the surface polishing mechanism in the embodiment of the utility model;

[0031] Fig.15 It is a three-dimensional diagram of the auxiliary polishing mechanism in the embodiment of the utility model;

[0032] Fig.16 It is a three-dimensional diagram of the detail polishing mechanism in the embodiment of the utility model;

[0033] Fig.17 It is a three-dimensional diagram of the surface treatment mechanism of the insert in the embodiment of the utility model;

[0034] Fig.18 It is a stereoscopic diagram of the spokes in the embodiment of the utility model.

[0035] Reference numerals:

[0036] Wheel hub manufacturing system 1000; spoke forming mold 100; movable mold 110; movable mold parting surface 110A; mounting matching hole 111; fitting protrusion 1111; fitting groove 1111a; spoke forming groove body 112; center axis 112A; insert positioning portion 1121; insert limiting protrusion 11212; insert positioning groove 11211; lateral opening 11211a; positioning groove bottom surface 11211b; insert matching sub-groove 11211c; fitting protrusion 11211d; overflow groove portion 113; overflow limiting protrusion 1131; edge portion 11311; overflow accommodating groove 1132; overflow guiding groove 1133; overflow hole 114; exhaust groove 115; push hole 116; insert mounting hole 117; movable mold mounting hole 118 ; movable mold guide hole 119; fixed mold 120; fixed mold parting surface 120A; spoke plate convex molding groove 121; spoke molding matching groove body 122; groove bottom surface part 1221; overflow matching groove 123; runner hole 124; fixed mold mounting hole 128; fixed mold limiting hole 129; cavity 130; spoke plate molding cavity 131; spoke molding cavity 132; overflow cavity 133; exhaust channel 134; spoke manufacturing equipment 200; die casting device 210; insert arrangement device 220; spoke workpiece transfer device 230; spoke outer circle device 240; device housing 241; sliding window 242; rotating unit 243; rotating seat 2431; slide unit 244; slide 2441; guide groove 24411; slide drive mechanism 244 2; slide rail 2443; tool unit 245; tool assembly 2451; tool mounting seat 24511; tool 24512; guide protrusion 24513; tool drive mechanism 2452; automatic assembly unit 246; spoke finishing device 600; first loading mechanism 620; first loading platform 621; spoke loading part 622; spoke transfer mechanism 630; multi-axis robot arm 631; surface polishing mechanism 640; first bracket 641; driving wheel 642; contact wheel 643; tensioning wheel 644; tensioning wheel bracket 645; tensioning driving cylinder 646; sanding belt 647; flying wing wheel 648; auxiliary polishing mechanism 650; second bracket 651; first support wheel 652; second support wheel 653; detail polishing mechanism 660; file 661; insert surface treatment mechanism 670; milling cutter 671; second loading mechanism 680; rim manufacturing equipment 300; hub manufacturing equipment 400; press-fit welding device 410; rim shaping device 420; hub workpiece transfer device 430; quality inspection equipment 500; bearing linkage inspection device 510; hub appearance inspection device 520; industrial control unit 700; spoke 8; spoke body 81; spoke plate portion 811; center hole 811a; spoke 812; outer end portion 8121; arc-shaped end face 8121a; first end face 81a; second end face 82b; insert 9; first sheet portion 91; strip portion 911; special-shaped sheet portion 912; positioning end portion 9121; first through hole for combination 9122;First combination notch 9123; arc-shaped connecting portion 92; arc-shaped bottom surface 921; second sheet portion 93; second combination through hole 931; second combination notch 932. ; DETAILED DESCRIPTION

[0037] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the wheel hub manufacturing system of the present invention is specifically described below in conjunction with embodiments and drawings.

[0038] <Example>

[0039] Figure 1 It is a three-dimensional diagram of the wheel hub manufacturing system in this embodiment.

[0040] like Figure 1 As shown, the wheel hub manufacturing system 1000 includes: a spoke manufacturing device 200, a rim manufacturing device 300, a hub manufacturing device 400, a quality inspection device 500 and an industrial control unit 700. Among them, the spoke manufacturing device 200 is used to manufacture aluminum alloy spokes with multiple iron inserts embedded in them. The rim manufacturing device 300 is used to manufacture wheel rims. The hub manufacturing device 400 is used to put the spokes into the inner ring of the rim and weld the multiple inserts to the rim to form a composite hub. The quality inspection device 500 performs quality inspection on the welded hub. The industrial control unit 700 includes multiple industrial computers, which are used to control the above-mentioned devices to achieve automated production.

[0041] The structure of each device will be described in detail below.

[0042] The spoke manufacturing equipment 200 includes a spoke forming mold 100 , a die-casting device 210 , an insert arranging device 220 , a spoke workpiece transferring device 230 , a spoke outer circle turning device 240 and a spoke finishing device 250 .

[0043] Figure 2 is a structural exploded view of the spoke forming mold in this embodiment, Figure 3 : is a three-dimensional diagram of the movable mold in this embodiment, Figure 4 It is a three-dimensional diagram of the fixed mold in this embodiment.

[0044] like Figures 2 to 4 As shown, the spoke molding die 100 includes a movable die 110, a fixed die 120 and a core (not shown in the figure), wherein the core is embedded in the mounting hole in the middle of the movable die 110 to form a whole. In the open mold state, inserts can be placed in the movable die 110. In the closed mold state, a cavity for injecting castings and molding the spokes is formed between the parting surface of the movable die 110, the end surface of the core and the parting surface of the fixed die 120.

[0045] Figure 5 yes Figure 3Enlarged view of the part within the middle circle A.

[0046] like Figures 2 to 5 As shown, the movable mold 110 is generally in the shape of a rectangular block, with one surface in the thickness direction facing the fixed mold 120, and a movable mold parting surface 110A is provided on the surface. The movable mold 110 has a plurality of holes and grooves, including a mounting matching hole 111, five spoke forming grooves 112, five overflow grooves 113, five overflow holes 114, five exhaust grooves 115, ten pusher holes 116, five insert mounting holes 117, a pair of movable mold mounting holes 118, and four movable mold guide holes 119. Among them, the spoke forming grooves 112, the overflow grooves 113, and the exhaust grooves 115 are all arranged at the movable mold parting surface 110A.

[0047] The mounting matching hole 111 is used to embed the core, which is located in the middle of the movable mold 110 and penetrates along the thickness direction of the movable mold 110. The mounting matching hole 111 is generally a circular through hole, and its inner wall has a circle of inwardly protruding protrusions 1111, and the protrusions 1111 are evenly distributed along the circumference of the protrusions 1111. There is a certain distance between the upper end of the protrusions 1111 and one end of the mounting hole 111 located at the fixed mold matching surface 112, so the upper end of the protrusions 1111 forms a circle of supporting surfaces 1111b.

[0048] The core is generally cylindrical in shape, and its outer peripheral shape matches the mounting hole 111 on the movable mold 110, and can be inserted into the mounting hole 111 and abut against the support surface 1111b. One end of the core has a molding end face and a molding column with a diameter smaller than the molding end face. The molding end face is used to mold the concave surface of the spoke plate portion of the spoke, and the molding column is used to form a through center hole in the middle of the spoke for mounting a bearing.

[0049] The spoke forming groove 112 is used to form spokes. It is a roughly U-shaped groove, and the two ends of the U shape are respectively connected to the mounting matching hole 111, and the connection position between the spoke forming groove 112 and the mounting matching hole 111 has a rounded corner, and the groove bottom of the spoke forming groove 112 also has a rounded corner. The spoke forming groove 112 has an axially symmetrical structure, wherein the direction of the axis 112A is consistent with the radial direction of the mounting matching hole 111. In this embodiment, the width of the U-shaped bottom of the spoke forming groove 112 is greater than the width of the two sides of the U shape, and the edge of the U-shaped bottom of the spoke forming groove 112 has an outwardly protruding arc.

[0050] The U-shaped bottom edge of the spoke forming groove 112 has an insert positioning portion 1121 for pre-placing the insert and positioning the insert in the spoke forming groove 112 during placement and die-casting. The insert positioning portion 1121 includes an insert positioning groove 11211 for inserting the insert to position it.

[0051] The insert positioning groove 11211 is formed between the adjacent overflow groove portion 113 and the spoke forming groove body 112. Specifically, the overflow groove portion 113 has an overflow limiting protrusion 1131 in the form of an annular protrusion, one side portion 11311 of the protrusion is an arc-shaped strip protrusion adjacent to the U-shaped bottom of the spoke forming groove body 112, and a pair of insert limiting protrusions 11212 are formed near the side portion 11311 in the U-shaped bottom of the spoke forming groove body 112. The insert positioning groove 11211 is formed between the side portion 11311 and the pair of insert limiting protrusions 11212, and is a groove with a three-sided surrounding structure, one side of which has a lateral opening 11211a, and the opening direction of the lateral opening 11211a is toward the center of the movable mold 110.

[0052] The insert limiting protrusion 11212 is a rectangular parallelepiped protrusion with rounded corners, and its length direction is the axial direction of the spoke forming groove body 112, its surface direction is roughly perpendicular to the length direction of the spoke forming groove body 112, and its width direction is also the protrusion height direction. The size of the insert limiting protrusion 11212 is relatively small, its length is less than the width of the U-shaped bottom of the insert positioning groove 11211, and its width (i.e., the protrusion height) is slightly less than the depth of the U-shaped bottom of the insert positioning groove 11211. A pair of insert limiting protrusions 11212 are respectively formed at both ends of the insert positioning groove 11211 in the length direction, and the spacing between them is substantially consistent with the overall length of the insert.

[0053] The insert positioning groove 11211 is generally a strip-shaped arc-shaped groove, and its curvature is consistent with the curvature of the U-shaped bottom edge of the spoke-shaped groove body 112. The two sides of the groove bottom of the insert positioning groove 11211 have rounded corners in the width direction, and the overall shape of the groove bottom is consistent with the shape of the bottom surface of the insert. The positioning groove bottom surface 11211b of the insert positioning groove 11211 is a curved surface with a curvature as a whole and rounded corners on both sides in the width direction, and the curved surface matches the bottom surface of the insert. A side wall of the insert positioning groove 11211 (the side wall located on the side of the overflow limiting protrusion 1131) has an insert matching sub-groove 11211c with a shallow groove depth, and its shape matches the appearance of a sheet-like portion of the insert, and its bottom surface also has a curvature that matches the outer end surface of the sheet-like portion. A plurality of flat cylindrical engaging protrusions 11211d are also formed in the insert matching sub-groove 11211c, and the shapes and arrangements thereof respectively match the shapes and arrangements of the plurality of through holes on the above-mentioned sheet-like portion of the insert.

[0054] Therefore, the insert can be placed at the insert positioning portion 1121 and positioned, the bottom surface of the insert is roughly fitted with the bottom surface 11211b of the positioning groove, the two ends of the insert in the length direction are respectively in contact with the facing surfaces of a pair of insert limiting protrusions 11212, the end surface of a sheet portion of the insert is roughly fitted with the bottom of the insert matching sub-groove 11211c, and the multiple engaging protrusions 11211 are respectively engaged in the multiple through holes on the sheet portion of the insert, so that the insert is stuck and will not fall out of the mold in the open mold state, and will not be pushed due to the flow of the casting during die casting in the closed mold.

[0055] The overflow groove 113 is used to receive gas, gas inclusions, molten metal, etc. in the cavity. The overflow groove 113 is arranged beside the U-shaped bottom of each spoke-forming groove 112. The overflow groove 113 also has an axisymmetric structure and is coaxial with the corresponding spoke-forming groove 112. The overflow groove 113 includes an overflow limiting protrusion 1131, an overflow receiving groove 1132, and an overflow guiding groove 1133.

[0056] The overflow limiting protrusion 1131 is a generally square annular protrusion, and its corners and edges are rounded, and one side 11311 thereof faces the spoke forming groove body 112 and is connected to the U-shaped bottom of the spoke forming groove body 112, and the side 11311 of the overflow limiting protrusion 1131 has an arc that matches the U-shaped bottom of the spoke forming groove body 112. The above-mentioned insert matching sub-groove 11211c and the engaging protrusion 11211d are formed on one side wall of the side 11311 facing the spoke forming groove body 112.

[0057] The overflow receiving groove 1132 is formed inside the overflow limiting protrusion 1131 and is a groove body that is roughly in the shape of an inverted terrace with rounded corners. The overflow guiding groove 1133 is an inclined triangular groove, and its groove opening is located at the above-mentioned edge of the overflow limiting protrusion 1131.

[0058] The insert matching groove 1134 is formed in the middle of a side surface 1131a of the above-mentioned edge of the overflow limiting protrusion 1131 facing the spoke forming groove body 112, and the side surface 1131a has the above-mentioned curvature and the surface direction is perpendicular to the surface in the thickness direction of the movable mold 110. The fitting groove 1134 is a groove with a very shallow depth, and is a curved strip groove as a whole, and has a shape matching an end surface in the width direction of the entire insert, and the fitting groove 1134 has three flat cylindrical fitting protrusions 11341 matching the through holes on the insert.

[0059] The overflow hole 114 is used to allow excess molten metal to flow out. It is a circular through hole with a smaller diameter. One end of the overflow hole 114 is located in the middle of the bottom of the overflow receiving groove 1132, and the other end is located on the other surface of the movable mold 110 in the thickness direction (i.e., the surface opposite to the movable mold parting surface 110A), and its extension direction is the thickness direction of the movable mold 110.

[0060] The exhaust groove 115 is used to discharge the gas and gas inclusions in the cavity. It is a flat groove body that may have a bend, extending from one end of the insert matching groove 1134 away from the spoke forming groove body 112 and extending to the edge of the movable mold 110 close to the insert matching groove 1134. A portion of the exhaust groove 115 is formed on the upper surface and one side surface of one edge of the overflow limiting protrusion 1131, and the other portion is formed on the surface of the movable mold 110 in the thickness direction and the portion may have a bend.

[0061] The push hole 116 is used to set a corresponding push rod so as to push the spoke out of the mold after it is formed. The push hole 116 is a circular through hole with a smaller diameter, one end of which is located at the bottom of the U-shaped bottom of the spoke forming groove 112 and close to the insert positioning groove 11211, and the other end is located on the other surface of the movable mold 110 in the thickness direction, and the extension direction is the thickness direction of the movable mold 110. In this embodiment, each spoke forming groove 112 is correspondingly provided with two push holes 116.

[0062] The insert mounting hole 117 is a square tapered groove, the end with a smaller diameter is located at the bottom of the U-shaped bottom of the spoke forming groove body 112 and close to the insert positioning groove 11211, and is located between a pair of push holes 116, and the other end with a larger diameter is located on the other surface of the movable mold 110 in the thickness direction, and its extension direction is the thickness direction of the movable mold 110. The cross section of the insert mounting hole 117 in its extension direction is a rounded rectangle, and its hole diameter changes uniformly. The insert mounting hole 117 is used to install a corresponding insert so as to form a specific shape on the surface of the outer end of the spoke. For example, an insert with a model-shaped groove on the end face can form a model-shaped protrusion on the surface of the outer end of the spoke.

[0063] The movable mold mounting hole 118 is used to cooperate with the corresponding mounting rod to mount the movable mold 110 on the die-casting machine. The movable mold mounting hole 118 is a circular through hole that penetrates along the length direction of the movable mold 110 and is staggered with the above-mentioned overflow hole 114, the push hole 116, and the insert mounting hole 117.

[0064] The movable mold guide hole 119 is used to cooperate with the corresponding guide rod to guide the movement of the movable mold 110 during the die casting process. The movable mold guide hole 119 is a circular hole with one end closed. Four movable mold guide holes 119 are respectively arranged at the four corners of the movable mold 110, and are staggered with the movable mold mounting hole 118, the overflow hole 114, the push hole 116, and the insert mounting hole 117.

[0065] The fixed mold 120 is also roughly in the shape of a rectangular block, and its overall size is basically the same as that of the movable mold 110. It has a fixed mold parting surface 120A on one surface facing the thickness direction of the movable mold 110. The fixed mold 120 has a spoke plate convex molding groove 121, five spoke molding matching groove bodies 122, five overflow matching grooves 123, a runner hole 124, a pair of fixed mold mounting holes 128 and four fixed mold limit holes 129. Among them, the runner hole 124 is formed in the middle of the fixed mold 120, and the spoke plate convex molding groove 121, the spoke molding matching groove body 122 and the overflow matching groove 123 are all located at the fixed mold parting surface 120A.

[0066] The spoke plate convex surface forming groove 121 is substantially a circular groove, and the bottom edge of the groove has a rounded corner, which is used to form the convex surface of the middle spoke plate portion of the spoke.

[0067] The shapes and arrangement of the plurality of spoke-shaped matching grooves 122 correspond to the plurality of spoke-shaped matching grooves 112. The spoke-shaped matching grooves 122 are also U-shaped, and the two ends of the U-shaped grooves are respectively connected to the spoke plate convex surface forming grooves 121, and the connecting positions of the spoke-shaped matching grooves 122 and the spoke plate convex surface forming grooves 121 have rounded corners. The difference between the spoke-shaped matching grooves 122 and the spoke-shaped matching grooves 112 is that the bottom of the U-shaped grooves does not have a protrusion, but has a groove bottom surface portion 1221 that is approximately flat. The groove bottom surface portion 1221 is slightly inclined relative to the surface direction of the fixed mold 120, so that the groove depth of the bottom of the U-shaped groove of the spoke-shaped matching grooves 122 gradually deepens from the middle of the fixed mold 120 to the outside. In addition, the overall groove depth of the spoke-shaped matching grooves 122 is greater than the overall groove depth of the spoke-shaped grooves 112.

[0068] The shapes and arrangement of the multiple overflow matching grooves 123 correspond to the multiple overflow grooves 113. The overflow matching grooves 123 are generally rectangular grooves with rounded corners, and one side thereof is connected to one end (the bottom of the U-shape) of the corresponding spoke-shaped matching groove body 122. The size of the overflow matching grooves 123 is slightly larger than the outer dimensions of the overflow limiting protrusions 1131.

[0069] The runner hole 124 is a tapered through hole, the end with a larger hole diameter is located on the side of the fixed mold parting surface 120A, and the end with a smaller hole diameter is located on the other surface in the thickness direction of the fixed mold 120, and the runner hole 124 has a two-stage tapered hole structure, and a step with rounded corners is formed between the two stages of the tapered hole. The end with a larger hole diameter of the runner hole 124 also has a rounded corner.

[0070] The fixed die mounting hole 128 is a small circular through hole that penetrates along the length direction of the fixed die 120 and is staggered with the above-mentioned runner hole 124 for mounting the fixed die 120 on the die-casting machine.

[0071] The fixed mold limiting hole 129 is used to cooperate with the corresponding fixing rod to limit the fixed mold 120 during the mold closing and opening process, so that it remains parallel to the movable mold 110 and directly in front of the movable mold 110 in the moving direction. The fixed mold limiting hole 129 is a circular hole with one end closed, and four fixed mold limiting holes 129 are respectively arranged at the four corners of the fixed mold 120. The four fixed mold limiting holes 129 are staggered with the fixed mold mounting holes 128.

[0072] Figure 6 is a three-dimensional diagram of the insert in this embodiment.

[0073] like Figure 6 As shown, the insert 9 is formed integrally from a bent sheet, and its cross section in the length direction is U-shaped. The insert 9 can be roughly divided into a first sheet portion 91, an arc-shaped connecting portion 92 and a second sheet portion 93 along its bending direction.

[0074] The first sheet portion 91 is in the shape of a slightly curved irregular sheet, including a rectangular strip-shaped strip portion 911, two irregular sheet portions 912 extending from one side of the strip portion 911 in the width direction, and a notch formed between the two irregular sheet portions 912. The outer end of each irregular sheet portion 912 is a triangular sheet-shaped positioning end portion 9121. Each irregular sheet portion 912 has a first circular through hole 9122 for combination running through the middle, and a first notch 9123 for combination in the shape of a rounded square on one side.

[0075] The arc-shaped connecting portion 92 is connected between the first sheet portion 91 and the second sheet portion 93, and its two ends in the width direction are bent portions. The outer side of the arc-shaped connecting portion 92 forms an arc-shaped bottom surface 921. The arc-shaped bottom surface 921 is a quadratic surface, having an arc along its length direction and rounded corners on both sides in the width direction. The groove bottom shape of the above-mentioned insert positioning groove 11211 matches the arc-shaped bottom surface 921.

[0076] The second sheet portion 93 is in the shape of a strip with a slight curvature as a whole. Three circular second through holes 931 for combination are distributed on the second sheet portion 93. The shape and arrangement of the three engaging protrusions 11341 match the three second through holes 931 for combination. The second sheet portion 93 has a second square-shaped notch 932 for combination in the shape of a rounded corner on both sides of the length direction. The overall shape of the insert matching sub-groove 11211c matches the outer contour of the second sheet portion 93, and the curvature of the groove bottom surface matches the curvature of the arc-shaped outer end surface 933 of the second sheet portion 93.

[0077] Figure 7 is a cross-sectional view of the spoke forming mold with the insert placed in this embodiment, Figure 8 yes Figure 7 Enlarged view of the inner part of circle C.

[0078] like Figure 7and Figure 8 As shown, in the mold opening state, the insert 9 can be placed at each insert positioning portion 1121. In the mold closing state, the movable mold parting surface 110A of the movable mold 110 and the fixed mold parting surface 120B of the fixed mold 120 cooperate to form a cavity 130, and the cavity 130 includes a spoke plate molding cavity 131, a plurality of spoke molding cavities 132, a plurality of overflow cavities 133, an exhaust channel 314 and a center hole molding cavity (not shown in the figure).

[0079] The spoke plate forming cavity 131 is formed by the mounting matching hole 111 of the movable mold 110, the core forming end face and column of the core, and the spoke plate convex forming groove 121 of the fixed mold 120. The spoke forming cavity 132 is formed by the corresponding spoke forming groove body 112 and the spoke forming matching groove body 122, and is U-shaped as a whole, and the two ends of the U shape are respectively connected to the spoke plate forming cavity 131 in the middle. The overflow cavity 133 is formed by the corresponding overflow groove part 113 and the overflow matching groove 123, and one end thereof is connected to one end (the bottom of the U shape) of the corresponding spoke forming cavity 132. The center hole forming cavity is formed by the outer peripheral surface of the column of the core and the runner hole 124 of the fixed mold 120, and one end thereof is connected to the spoke plate forming cavity 131. The exhaust passage 314 is formed by the corresponding overflow groove portion 113 , the exhaust groove 115 , the overflow matching groove 123 , and the end surface of the fixed mold 120 .

[0080] Therefore, after the mold is closed, molten metal (molten aluminum alloy) can be injected into the cavity 130 of the mold 100 through the runner hole 124 and die-cast to form aluminum alloy spokes with inserts 200 embedded in the ends of each spoke.

[0081] Among them, in the mold open state, when the insert 9 is placed in the insert positioning part 1121 of the movable mold 110, its arc-shaped bottom surface 921 is roughly in contact with the bottom surface 11211b of the positioning groove 11211 of the insert positioning groove, and the outer side surface of the second sheet portion 93 is roughly in contact with the bottom surface of the groove of the insert matching sub-groove 11211c, and the three engaging protrusions 11211d are respectively embedded in the three second combining through holes 931, and a pair of insert limiting protrusions 11212 are respectively in contact or abutment with the two sides of the length direction of the insert 9, so that the insert 9 is stuck in the insert positioning part 1121, and will not fall out of the movable mold 110 in the mold open state, and it is not easy to be displaced.

[0082] In the mold closing state, the insert 9 is positioned by the insert positioning portion 1121 and is further pressed by the passive mold 110 and the fixed mold 120 along the thickness direction thereof, and the arcuate bottom surface 921 of the insert 9 abuts against the bottom surface 11211b of the positioning groove, and the upper end surfaces (i.e., the tips of the triangles) of a pair of positioning end portions 2121 of the insert 9 abut against the bottom surfaces of the spoke-forming matching groove body 122 of the fixed mold 120, respectively, thereby further fixing the insert 9 and making it less likely to be displaced.

[0083] The spoke forming mold 100 is disposed in a die-casting device 210. The die-casting device 210 drives the spoke forming mold 100 to open and close the mold, and performs die-casting to form spokes using the spoke forming mold 100. In this embodiment, the die-casting device 210 is a horizontal die-casting machine, and a movable mold 110 and a fixed mold 120 embedded with a core are installed on the die-casting machine in parallel with each other.

[0084] The insert arrangement device 220 is used to automatically arrange the multiple inserts required for manufacturing a spoke into an arrangement consistent with the multiple insert placement positions in the mold (that is, an arrangement consistent with the multiple inserts in the final product). The insert arrangement device 220 includes a vibration plate, an insert pre-positioning mechanism, an insert placement mechanism, and an insert detection mechanism.

[0085] The vibration plate adjusts a plurality of disordered inserts to the same orientation through vibration and outputs them to a loading platform in sequence. The inserts on the loading platform are in a standing state with the positioning ends facing upward.

[0086] The insert pre-positioning mechanism includes a rotatable turntable and a plurality of inserting stations evenly arranged on the edge of the turntable. The arrangement of the plurality of inserting stations is consistent with the arrangement of the plurality of inserts in the final spoke product. Each inserting station can keep the insert in a standing state with the positioning end facing upward. By rotating the turntable, each inserting station can be directed toward the above-mentioned loading platform in turn.

[0087] The insert placement mechanism is a robot that can pick up the insert on the mounting table and place it on the insert station that the mounting table is currently facing.

[0088] The insert detection mechanism includes a turntable and a plurality of micro switches arranged on the edge of the turntable. The arrangement of the micro switches is also consistent with the arrangement of the plurality of inserts in the final spoke product, and is used to detect whether all the required inserts have been grasped when the spoke workpiece transfer device 230 grasps the arranged plurality of inserts.

[0089] The specific structure of the insert arrangement device 220 can be found in CN115246003A and will not be described in detail.

[0090] The spoke workpiece transfer device 230 is used to simultaneously grab multiple inserts required for manufacturing a spoke arranged by the insert arrangement device 220 and place them into the movable mold 110 of the spoke forming mold 100 in the open mold state, and is used to grab the spoke from the spoke forming mold 100 in the open mold state after the die casting is completed. The spoke workpiece transfer device 230 includes an industrial robot arm, an insert grabbing mechanism and a spoke grabbing mechanism that are arranged on the end joint of the industrial robot arm in opposite directions, and one of them can be turned toward the mold by rotating the end joint. The insert grabbing mechanism includes a plurality of small clamps that can simultaneously clamp multiple inserts on the insert pre-positioning mechanism. The spoke grabbing mechanism includes a larger movable clamp for clamping the material handle of the spoke. The specific structure of the spoke workpiece transfer device 230 can also be found in CN115246003A, which will not be repeated here.

[0091] During production, the insert arrangement device 220 arranges the number of inserts required to produce one spoke. Then, the insert grabbing mechanism of the spoke workpiece transfer device 230 moves to the pre-positioning disk of the insert arrangement device 220, grabs the arranged multiple inserts at the same time, and puts them into the various insert placement positions of the movable mold 110 in the open mold state. After putting them down, the insert grabbing mechanism of the spoke workpiece transfer device 230 withdraws from the range of the die-casting device 210. After that, the die-casting device 210 closes the spoke forming mold 100 with the inserts, and injects molten aluminum alloy liquid into the closed mold, maintains a predetermined temperature and pressure for a predetermined time, so as to perform die-casting to form an aluminum alloy spoke workpiece. Finally, the die-casting device 210 opens the spoke forming mold 100, and after the end joint of the spoke workpiece transfer device 230 rotates, the spoke grabbing mechanism grabs the material handle of the spoke workpiece formed by die-casting, and removes the spoke workpiece from the mold. Then the next production cycle can begin.

[0092] The manufactured spoke workpiece includes a spoke plate portion located in the middle thereof and a plurality of spokes extending radially outward from the edge of the spoke plate portion. The spoke plate portion has a central hole penetrating in the middle thereof, and an insert is pre-embedded at the outer end of each spoke.

[0093] The spoke outer circle turning device 240 is used to turn the outer circle of the die-cast aluminum alloy spokes, so that the outer circumference of the spokes has better roundness, more precise size, and better matching with the rim.

[0094] Fig. 9 is a three-dimensional diagram of the spoke car outer circle device in this embodiment, Fig.10 yes Fig. 9 The enlarged view of the inner part of the middle circle D, Fig.11 2 is a three-dimensional diagram of the turning tool assembly in this embodiment.

[0095] like Figures 9 to 11As shown, the spoke turning device 240 includes a device housing 241 , a sliding window 242 , a rotating unit 243 , a slide unit 244 , a turning tool unit 245 and an automatic assembly unit 246 .

[0096] The device housing 241 is a shell that is generally in the shape of a cuboid with missing corners and has a lateral opening. The rotating unit 243, the slide unit 244, and the turning tool unit 245 are all installed inside the device housing 241. The sliding window 242 is slidably arranged on the device housing 241. When it slides to one side, the lateral opening can be exposed. When it slides to the other side, the lateral opening can be covered. When covered, a roughly closed space is formed inside the device housing 241 and the sliding window 242. In addition, a sensor starter and stopper for sensing the lateral opening is also installed on the device housing 241. When the sliding window 242 slides to expose the lateral opening, the sensor starter and stopper controls the rotating unit 243, the slide unit 244, and the turning tool unit 245 to stop working.

[0097] The rotating unit 243 includes a rotating seat 2431 and a rotating driving mechanism for driving the rotating seat 2431 to rotate. The rotating seat 2431 is installed on one side of the length direction of the device housing 241 and is located at the lateral opening. The middle part of the rotating seat 2431 has a rotating shaft for driving the spoke workpiece to rotate, and the rotating shaft is horizontally arranged. In this embodiment, the rotating shaft is interference-fitted with the center hole of the spoke workpiece, so that the spoke workpiece can be driven to rotate synchronously.

[0098] The slide unit 244 includes a slide 2441, a slide drive mechanism 2442, and a slide rail 2443. The two slide rails 2443 are arranged at the bottom of the device housing 241 and extend along the length direction of the device housing 241. The slide 2441 is slidably engaged with the two slide rails 2443. The upper surface of the slide 2441 has a plurality of guide grooves 24411. The extension direction of the guide grooves 24411 is horizontal and perpendicular to the extension direction of the slide rails 43. The cross section of the guide groove 24411 is an inverted T-shape, that is, the notch is the bottom of the T-shape.

[0099] The turning tool unit 245 includes a turning tool assembly 2451 and a turning tool driving mechanism 2452 .

[0100] The turning tool assembly 2451 includes a turning tool mounting seat 24511 and a turning tool 24512. The turning tool mounting seat 24511 is generally in the shape of a rectangular block. Two mutually parallel guide protrusions 24513 are provided at the bottom of the turning tool mounting seat 24511. The shape of the guide protrusions 24513 matches the shape of the guide groove 411. The two guide protrusions 24513 are respectively slidably embedded in the two guide grooves 411, so that the turning tool mounting seat 24511 can move along the extension direction of the guide groove 411. The two sides of the turning tool mounting seat 24511 are respectively provided with mounting grooves with square cross-sections. The turning tool 24512 includes a blade body and a blade tip. The blade body is in the shape of a rectangular parallelepiped and is embedded in the mounting groove on one side of the turning tool mounting seat 24511. The blade tip is wedge-shaped and is located outside one side of the turning tool mounting seat 24511.

[0101] The automatic assembly unit 60 is an industrial robot arm, which is arranged outside the device housing 241 and located outside the side of the spoke outer circle turning device 240 having a sliding window 242. It is used to grasp the spoke workpiece to be processed and place it into the device housing 241 and assemble it on the rotating seat 2431, and to remove the spoke workpiece that has completed the outer circle turning operation from the rotating seat 2431 and move it to the outside of the device housing 241 and then place it at a designated position.

[0102] In this embodiment, when the spoke workpiece is being turned on the outer circumference, the rotating seat 2431 drives the spoke workpiece to rotate at a speed of 1800r / min, and the turning tool 24512 turns the outer circumference of the spoke workpiece at a speed of 700mm / min. The aluminum alloy layer with a thickness of 40 wires is roughly turned off at the outer end of each spoke of the spoke workpiece, and the outer circumference turning process takes about 12s.

[0103] According to the casting margin of the cavity of the spoke forming die 100 of this embodiment, the outer surface of the insert 9 is covered with a thin aluminum alloy layer, and the aluminum alloy layer with a thickness of 40 wires is turned without basically touching the insert 9, that is, after the outer circle turning process, a very thin aluminum alloy layer may still be attached to the outer surface of the second sheet portion 93 of the insert 9. In addition, when the aluminum alloy spoke is formed by die casting, due to factors such as insufficient mold closing pressure and insufficient clamping force, the outer surface of the aluminum alloy spoke is inevitably subject to some small defects such as burrs. Therefore, a spoke finishing device is provided in this embodiment.

[0104] Fig.12 is a stereoscopic diagram of the spoke finishing device in this embodiment, Fig.13 It is a stereoscopic view of the spoke finishing device at different angles in this embodiment.

[0105] like Fig.12 and Fig.13As shown, the spoke finishing device 600 includes a first loading mechanism 620, a spoke transfer mechanism 630, a surface polishing mechanism 640, an auxiliary polishing mechanism 650, a detail polishing mechanism 660, an insert surface treatment mechanism 670, and a second loading mechanism 680. The spoke finishing device 600 also includes a housing (not shown) composed of a plurality of protective plates, which accommodates the above-mentioned mechanisms to prevent burrs and the like from flying out during the processing and causing damage to the staff or other surrounding equipment or workpieces.

[0106] The first loading mechanism 620 is used to place the spokes to be surface treated. The first loading mechanism 620 includes a first loading platform 621 and a plurality of spoke loading parts 622 arranged on the table surface of the first loading platform 621. The spoke loading parts 622 are used to load the spoke workpiece to be processed, so that the surface direction of the spoke workpiece is roughly horizontal with the table surface, and one end face of the spoke workpiece is facing upward, which is convenient for the robot arm to pick up. In this embodiment, the spoke workpiece has three fan-shaped spokes, and accordingly, each spoke loading part 622 includes three rectangular blocks. The three spokes of the spoke workpiece can be respectively loaded on the three rectangular blocks, so that the spoke workpiece is placed roughly horizontally on the first loading platform 621.

[0107] The spoke transfer mechanism 630 is used to take the spokes to be surface treated from the first loading mechanism 620, and transfer the spokes to each processing mechanism in turn, and transfer the spokes that have completed the surface treatment to the second loading mechanism 680. The spoke transfer mechanism 630 includes a multi-axis mechanical arm 631 and a spoke grabbing assembly (not shown in the figure) arranged on the multi-axis mechanical arm 631. In this embodiment, the spoke grabbing assembly includes three support members that can move radially along the same central axis so as to approach or move away from each other, and a cylinder that drives the three support members to move. Therefore, the three support members can extend into the center hole of the spoke workpiece in a state of approaching each other, and move away from each other (i.e., open) under the drive of the cylinder, so as to support the inner wall of the center hole and grab the spoke workpiece. In addition, a rubber buffer is also provided at one end of the support member that is used to press against the inner wall of the center hole, which can avoid damage to the inner wall of the center hole when opening, and can also increase the friction between the support member and the inner wall of the center hole, so that the mechanical arm can drive the spoke to rotate.

[0108] By gripping the spoke workpiece in this way, the two axial end faces and the periphery of the spoke workpiece are unobstructed, which facilitates grinding and polishing thereof.

[0109] Fig.14 It is a three-dimensional diagram of the surface polishing mechanism in this embodiment.

[0110] like Fig.14As shown, the surface polishing mechanism 640 is used to grind and polish the outer surface of the spoke to remove burrs on the two end faces and side faces of the spoke (i.e., the end faces facing each other of two adjacent spokes). The surface polishing mechanism 640 includes a first bracket 641, a driving wheel 642, a contact wheel 643, a tensioning wheel 644, a tensioning wheel bracket 645, a tensioning driving cylinder 646, a sanding belt 647, and a flying wing wheel 648, that is, the surface polishing mechanism 640 is in the form of a sanding belt machine.

[0111] The first bracket 641 includes a supporting vertical plate and a cross bar for mounting the contact wheel 643 .

[0112] The driving wheel 642 is rotatably mounted on the first bracket 641 and connected to a driving motor (not shown in the figure).

[0113] The contact wheel 643 is rotatably mounted on the crossbar of the first bracket 141. Relative to the driving wheel 642, the contact wheel 643 is located above and closer to the spoke transfer mechanism 630. The size of the contact wheel 643 is substantially the same as that of the driving wheel 642.

[0114] The tension wheel 644 is rotatably arranged on the tension wheel bracket 645, and the tension wheel bracket 645 is installed on the output end (piston rod) of the tension driving cylinder 646. The tension wheel 644 is arranged above the driving wheel 642 and the contact wheel 643, and the extension direction of the tension driving cylinder 646 is upward.

[0115] The abrasive belt 647 is mounted on the driving wheel 642, the contact wheel 643 and the tensioning wheel 644. When the tensioning driving cylinder 646 pushes the tensioning wheel 644 upward, the abrasive belt 647 is tensioned; the driving motor rotates the driving wheel 642, driving the abrasive belt 647, the contact wheel 643 and the tensioning wheel 644 to rotate. At this time, the spoke to be processed is pressed onto the rotating abrasive belt 647 at the contact wheel 643 by the mechanical arm, so that the outer surface of the spoke can be ground and polished.

[0116] In this embodiment, the driving wheel 642, the contact wheel 643, and the tensioning wheel 644 are all rubber wheels for sanding belts.

[0117] The flying wing wheel 648 (also called a flap emery cloth wheel, flap sandpaper wheel, etc.) is coaxially connected to the contact wheel 643, and can rotate synchronously with the contact wheel 643 when the contact wheel 643 rotates. The flying wing wheel 648 is close to the contact wheel 643, and the distance between the two is small, which is smaller than the radius of the spoke. The diameter of the flying wing wheel 648 is larger than the contact wheel 643. When the first end face or the second end face of the spoke to be processed is pressed onto the contact wheel 643 by the robotic arm, the spokes of the spokes just contact the emery cloth sheet on the periphery of the flying wing wheel 648. Through the rotation of the flying wing wheel 648, the outer surface of the spokes of the spokes, especially the facing end faces (side faces) of two adjacent spokes, can be ground and polished to remove burrs.

[0118] Fig.15 It is a three-dimensional diagram of the auxiliary polishing mechanism in this embodiment.

[0119] like Fig.15 As shown, the auxiliary polishing mechanism 650 is also used to grind and polish the outer surface of the spoke, and includes a second bracket 651, a first support wheel 652, a second support wheel 653 and a sanding belt (not shown in the figure).

[0120] The second bracket 651 includes a support plate and a wheel bracket installed on one side of the support plate and extending outward. The first support wheel 652 and the second support wheel 653 are rotatably installed at the two ends of the wheel bracket, and are located in the same vertical direction. The first support wheel 652 and the second support wheel 653 are both rubber wheels for sanding belts, and their sizes are roughly the same. The sanding belt is mounted on the first support wheel 652 and the second support wheel 653.

[0121] The surface polishing mechanism 640 and the auxiliary polishing mechanism 650 are respectively arranged on both sides of the spoke transfer mechanism 630 (robotic arm). In order to reduce the footprint, these mechanisms are arranged relatively compactly. Due to the limitations of the rotation angle and other aspects of the multi-axis robotic arm 631, a small part of the polishing operation can be assisted by the auxiliary polishing mechanism 650.

[0122] Fig.16 It is a three-dimensional diagram of the detail polishing mechanism in this embodiment.

[0123] like Fig.16 As shown, the detail polishing mechanism 660 is used to polish the details of the outer surface of the spoke, such as the inner corners of the spoke (such as the intersection of the roots of two adjacent spokes, and the corners of the hollowed-out part when the spoke has a hollowed-out structure), and further remove the burrs of the details that cannot be removed by the flying wing wheel 648. The detail polishing mechanism 660 is arranged on the top of the first bracket 141. In this embodiment, the detail polishing mechanism 660 is used as a radial floating file machine, and its model is LL-NFL-C-9K0-050. The file 661 of the detail polishing mechanism 660 is in the shape of a long and thin strip and is arranged horizontally. After the detail polishing mechanism 660 is started, each detail of the spoke to be polished is moved to the file 661 by the mechanical arm, and the file 661 floats to remove the burrs of the details.

[0124] Fig.17 It is a three-dimensional diagram of the insert surface treatment mechanism in this embodiment.

[0125] like Fig.17As shown, the insert surface treatment mechanism 670 is used to scrape off the thin aluminum alloy layer on the outer surface of the insert at the spoke end. In this embodiment, the insert surface treatment mechanism 670 is a rotary milling cutter, and is provided with 6# to 8# milling cutters 671. After the insert surface treatment mechanism 670 is started, the outer surface of the insert at the end of each spoke of the wheel is moved to the milling cutter 671 by the mechanical arm, and the milling cutter 671 scrapes off the thin layer of casting material attached to the outer surface of the insert.

[0126] The second loading mechanism 680 is used to load the spokes that have completed surface processing so that other robot arms or workers can transfer these spokes to the next station or warehouse, etc. The structure of the second loading mechanism 680 is the same as that of the first loading mechanism 120, and will not be repeated.

[0127] In this embodiment, the spoke workpiece is made of aluminum alloy with a hardness of approximately 76HBW to 83HBW. When grinding the first end face and the second end face, the rotation speed of the driving wheel 143 is 1800r / min, and the force with which the robotic arm presses the first end face / second end face against the contact wheel 144 is approximately 1.5kg.

[0128] Fig.18 It is a three-dimensional diagram of the spokes in this embodiment.

[0129] like Fig.18 As shown, the spoke 8 includes a spoke body 81 and a plurality of inserts 9. The spoke body 81 includes a spoke plate portion 811 in the middle and a plurality of fan-shaped spokes 812 extending radially outward from the edge of the spoke plate portion 811. The spoke plate portion 811 has a through central hole 811a in the middle. The outer end 8121 of the spoke 812 is arc-shaped and has an arc-shaped end face 8121a away from the center of the spoke. The two axial end faces of the spoke body 81 are respectively a first end face 81a and a second end face 82b.

[0130] The spoke outer turning device 240 is used to perform turning processing on a plurality of arc-shaped end faces 8121a (which are on a uniform circumference).

[0131] The surface polishing mechanism 140 and the auxiliary polishing mechanism 150 are used to polish the first end face 81 a and the second end face 82 b of the spoke 8 , wherein the flying wing wheel 148 is particularly used to polish the edge of the spoke 812 .

[0132] The detail polishing mechanism 160 is used to polish details such as the intersection of the roots of two adjacent spokes 812 and the corners of the hollowed-out parts when the spokes 812 have a hollowed-out structure.

[0133] By using the spoke manufacturing equipment 200, an aluminum alloy spoke with an insert pre-embedded at the outer end of each spoke can be manufactured.

[0134] The wheel rim manufacturing equipment 300 includes a coil welding machine, an expansion machine, a vertical spinning machine, a vertical expanding machine, and a punching machine. The coil welding machine rolls a rectangular sheet of iron strip into a coil and welds the two ends connected after rolling up to make an iron ring. The expanding machine is used to press the iron ring to form an iron ring with better roundness and concave along its circumferential middle. The vertical spinning machine is used to spin-form the expanded iron ring, and preliminarily process the groove bottom and bead seat structure for installing the tire on the iron ring, but do not process the rim structure first, so as to obtain the rim workpiece. The vertical expanding machine is used to expand and form the rim workpiece after spinning, so that the size of the groove bottom and the bead seat basically reaches the corresponding design size. The punching machine is used to punch out the valve core hole on the expanded rim workpiece. These equipment and corresponding processing methods are prior art and will not be described in detail.

[0135] The wheel hub manufacturing equipment 400 includes a press-fit welding device 410 , a rim shaping device 420 , and a wheel hub workpiece transferring device 430 .

[0136] The press-fit welding device 410 is used to press-fit the wheel spoke into the wheel rim workpiece, and weld the inserts on the outer ends of the wheel spokes to the inner ring of the wheel rim respectively, so as to form the wheel hub workpiece. The press-fit welding device 410 can specifically adopt the structure in CN114850671A, which will not be described in detail.

[0137] The rim shaping device 420 is a vertical spinning shaping machine, which is used to cooperate with the corresponding shaping mold to spin and shape the rim part of the hub workpiece, so that the edges on both sides of the rim part are rolled outward to form a rim structure for mounting a tire, so that the rim part becomes the structure of a finished rim. That is, in the corresponding manufacturing method of this system, the rim is not curled first in the manufacturing process of the rim, but the rim is curled and shaped after the spokes and the rim workpiece are welded, so that the size of the rim is more accurate.

[0138] The hub workpiece transfer device 430 is also an industrial robot arm, which is used to place the spokes and rim workpieces to be welded on the press-fit welding device 410 respectively, and is also used to remove the welded hub workpiece from the press-fit welding device 410 and assemble it on the rotating shaft of the rim shaping device 420, and is also used to remove the shaped hub from the rim shaping device 420 and transfer it to a predetermined position.

[0139] Optionally, the wheel hub is also spray-painted.

[0140] After the hub is manufactured, workers install a sleeve and two bearings in the center hole of the hub to form a final hub product. Optionally, workers can also perform some finishing on the hub, such as further removing miscellaneous edges.

[0141] The quality inspection device 500 is used to perform quality inspection on the manufactured composite wheel hub, and includes a bearing linkage inspection device 510 and a wheel hub appearance inspection device 520 .

[0142] The bearing linkage detection device 510 is used to detect the linkage of the two bearings of the wheel hub to ensure that the two bearings can rotate synchronously.

[0143] The wheel hub appearance inspection device 520 is used to inspect the appearance of the wheel hub, and includes a loading platform for placing the wheel hub to be inspected and multiple 3D cameras arranged toward the loading platform. The wheel hub appearance inspection device 520 can photograph the wheel hub on the loading platform through multiple 3D cameras to obtain depth maps of the wheel hub at different angles, and identify surface defects of the wheel hub, assembly errors (for example, using the wrong model of spokes) and other problems based on the multiple depth maps and a predetermined image detection algorithm.

[0144] Functions and Effects of the Embodiments

[0145] The hub manufacturing system provided in this embodiment includes a spoke manufacturing device, a rim manufacturing device and a hub manufacturing device, and can manufacture a composite hub with different spoke and rim materials. Among them, since the spoke manufacturing device has a spoke outer circle turning device, it can turn the outer periphery of the die-cast spoke workpiece, so that the roundness of the outer periphery of the spoke workpiece can be improved, so that it can better match the rim and reduce the risk of rim tearing failure when subjected to force. In addition, since the spoke manufacturing device also has a spoke finishing device, it can automatically finish the outer surface of the spoke workpiece, remove burrs and other surface defects inevitably generated by die casting, and make the appearance of the composite hub more beautiful. In particular, the spoke finishing device includes an insert surface treatment mechanism, which can remove the thin layer of casting material attached to the outer surface of the insert embedded in the outer end of the spoke of the spoke, so that the thin layer of casting material can be avoided from affecting the welding quality when the spoke and the rim are welded later, and the welding strength is guaranteed. Furthermore, since the rim workpiece manufactured by the rim manufacturing equipment does not have a rim structure, and the hub manufacturing equipment has a rim shaping device for spinning and shaping the rim part and processing the rim structure, the rim can be shaped after the spokes and the rim are welded to eliminate the influence of thermal expansion and contraction during welding on the rim size accuracy, thereby further improving the dimensional accuracy of the composite hub. By using such a composite hub in electric vehicles or motorcycles, users have a better driving experience and safer driving.

[0146] In the embodiment, the rotating shaft on the rotating seat in the spoke outer circle turning device is interference fit with the center hole on the spoke workpiece, which is easy to assemble and can stably drive the spoke workpiece to rotate at high speed. The slide can move axially along the spoke workpiece, and the turning tool assembly on the slide can move radially along the spoke workpiece, thereby accurately and efficiently performing turning processing on the outer periphery of the spoke workpiece.

[0147] Furthermore, the spoke finishing device also includes a surface polishing mechanism and a detail polishing mechanism, which can grind and polish details such as the two end faces of the spoke workpiece, the sides of each spoke, the intersection of the roots of two adjacent spokes, and the corners of the hollow parts on the spokes, and can achieve fully automated outer surface finishing in conjunction with an industrial robot arm, which not only improves production efficiency, but also produces spokes with beautiful appearance, and even the details are free of surface defects such as burrs.

[0148] Furthermore, the spoke finishing device also includes an auxiliary polishing mechanism, which can limit the stroke of the robot arm by grinding and polishing a portion of the surface with the auxiliary polishing mechanism, thereby reducing the overall surface area of ​​the spoke finishing device.

[0149] Furthermore, since a spoke forming mold with insert positioning grooves is used, when multiple inserts are pre-placed in the mold in an open state, the inserts can be embedded in the positioning grooves and are not likely to fall off or shift in position. When the mold is closed for die casting, the inserts can also be positioned through the positioning grooves to prevent the flow of the casting from causing the inserts to shift in position, thereby producing spokes with more accurate insert positions.

[0150] Furthermore, the bottom of the insert positioning groove matches the bottom surface shape of the insert, and one side wall of the insert positioning groove also has a matching sub-groove matching the end surface of the insert, and the matching sub-groove has a mating protrusion matching the through hole on the insert, so the insert can be stably placed in the positioning groove and is not easily moved by the casting. And because the height of the mating protrusion is small, it will not make the placement of the insert difficult, and the insert can still be easily placed in the positioning groove by utilizing the elasticity of the sheet-like insert.

[0151] Furthermore, the insert has two pointed positioning ends, and the height of the insert positioning groove in the mold cavity after mold closing matches the height from the positioning end of the insert to its bottom. Therefore, after mold closing, the mold can also press the insert in the height direction, thereby avoiding the insert from floating in the height direction when the casting flows, and further improving the position accuracy of the insert in the final spoke.

[0152] The above embodiments are only used to illustrate the specific implementation of the utility model, and the utility model is not limited to the description scope of the above embodiments. The technicians in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and the description are only to illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

[0153] For example, in the above embodiment, the system is used to manufacture a composite wheel hub including an iron rim and aluminum alloy spokes. In an alternative, the system can also manufacture composite wheel hubs composed of other materials, for example, the spokes can also be made of magnesium-aluminum alloy, industrial plastics, etc.

Claims

1. A wheel hub manufacturing system for manufacturing a composite wheel hub, characterized in that: include: Spoke manufacturing equipment for manufacturing spokes with inserts embedded in the ends of each spoke; Wheel rim manufacturing equipment, used for manufacturing wheel rim workpieces; as well as A wheel hub manufacturing device is used to combine the wheel spoke with the wheel rim workpiece to obtain the composite wheel hub. Wherein, the spoke manufacturing equipment comprises: A die-casting device, used for die-casting a casting to manufacture a spoke workpiece; A spoke outer rounding device, used for turning the outer circumference of the spoke workpiece to improve the roundness of the outer circumference of the spoke workpiece; and A spoke finishing device is used to finish the outer surface of the spoke workpiece. The spoke finishing device includes an insert surface treatment mechanism for removing a thin layer of the casting material attached to the outer surface of the insert, The wheel rim workpiece does not have a wheel flange structure, The wheel hub manufacturing equipment comprises: A press-fit welding device, used for arranging the spokes on the inner ring of the rim workpiece, and welding the insert to the rim workpiece to obtain a hub workpiece; and The rim shaping device is used for spinning and shaping the rim workpiece part of the hub workpiece to form the wheel flange structure on the rim workpiece part.

2. The wheel hub manufacturing system according to claim 1, Features: The outer end of each spoke has an arc-shaped end surface. The spoke outer circle turning device is used to turn the plurality of arc-shaped end faces. The spoke finishing device also includes: A surface polishing mechanism, used for grinding and polishing the outer end surface of the spoke; and The detail polishing mechanism is used for grinding and polishing the details of the spokes.

3. The wheel hub manufacturing system according to claim 2, characterized in that: in, The insert surface treatment mechanism is a rotary milling cutter, The outer end surface of the spoke includes the side surfaces of adjacent spokes facing each other. The surface polishing mechanism comprises a flying wing wheel for grinding and polishing the side surface.

4. The wheel hub manufacturing system according to claim 3, characterized in that: in, The surface polishing mechanism also includes: a driving motor, a driving wheel, a contact wheel, a tensioning wheel, a tensioning driving cylinder and an abrasive belt. The driving wheel is coaxially connected to the output end of the driving motor. The abrasive belt is mounted on the driving wheel, the contact wheel and the tensioning wheel. The tensioning drive cylinder is used to drive the tensioning wheel to move in a direction away from the driving wheel, thereby tensioning the abrasive belt.

5. The wheel hub manufacturing system according to claim 2, characterized in that: in, The spoke details include the intersections of adjacent spokes and the corners of the hollowed-out spokes. The detail polishing mechanism is a radial floating file machine, which is used to grind and polish the intersection and the corner.

6. The wheel hub manufacturing system according to claim 2, Features: Wherein, the wheel spoke outer circle device comprises: A rotating unit, used for assembling the spoke workpiece and driving the spoke workpiece to rotate; A slide table is movably arranged on one side of the rotating unit along the axial direction of the spoke workpiece mounted on the rotating unit; A slide drive mechanism, used for driving the slide to move; a turning tool assembly, which is movably disposed on the slide along the radial direction of the spoke workpiece mounted on the rotating unit, and has a turning tool for turning the arc-shaped end surface of the spoke workpiece; and The turning tool driving mechanism is used to drive the turning tool assembly to move.

7. The wheel hub manufacturing system according to claim 1, characterized in that: in, The spoke manufacturing equipment further includes a spoke forming die, which is arranged on the die-casting device and is used to inject the casting material for die-casting to form the spoke. The spoke forming die comprises a movable die and a fixed die. The movable die has a plurality of spoke forming grooves for forming the spokes. The spoke forming groove body has an insert positioning groove for placing the insert and positioning the insert during the die casting process. The middle part of the fixed mold is provided with a runner hole. When the mold is closed, the spoke forming groove is connected with the runner hole. The insert positioning groove has a lateral opening, and the opening direction thereof is toward the middle part of the movable mold.

8. The wheel hub manufacturing system according to claim 7, characterized in that: in, The insert is a curved sheet-like piece having an arc-shaped bottom surface and an arc-shaped and outwardly convex end surface, and the end surface has a plurality of through holes. The bottom of the insert positioning groove is located at the bottom of the spoke forming groove body. The bottom of the insert positioning groove has a shape corresponding to the bottom surface of the insert, One side groove wall of the insert positioning groove has an insert matching sub-groove corresponding to the end face of the insert. A groove wall on one side of the insert positioning groove also has a plurality of engaging protrusions corresponding to the through holes, which are formed in the insert matching sub-groove.

9. The wheel hub manufacturing system according to claim 7, characterized in that: in, The fixed mold has a plurality of spoke forming matching grooves, which are respectively used to cooperate with the plurality of spoke forming grooves of the movable mold to form a spoke forming cavity. In the thickness direction of the movable mold and the fixed mold, the distance from the groove bottom of the insert positioning groove to the groove bottom of the spoke forming matching groove body corresponds to the overall height of the insert.

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