Spoke forming die, spoke manufacturing device and hub manufacturing equipment

Abstract

The spoke forming die, the spoke manufacturing device and the composite hub manufacturing equipment comprise the movable die and the fixed die, and the insert positioning groove is formed in the spoke forming groove body of the movable die, so that an insert can be positioned when the insert is placed, and the position of the insert in the die can be kept when the die is closed and die-cast; and the position precision of the insert in the spoke is improved, so that the spoke and the rim can be better welded, and the quality of the composite hub is improved. Specifically, a pouring gate hole is formed in the middle of the fixed die, a spoke forming groove body of the movable die is communicated with the pouring gate hole, and a lateral opening of an insert positioning groove in the spoke forming groove body faces the middle of the movable die. The flow of the casting material can be guided and limited through the lateral opening, and the position of the insert in the spoke forming groove body is kept through the insert positioning groove when the casting material flows, so that the insert is prevented from being driven by the flow of the casting material, and the position precision of the insert is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of wheel hub manufacturing equipment, and specifically relates to a spoke forming die, a spoke manufacturing device and a wheel hub manufacturing equipment. Background Art

[0002] Traditional iron hubs are strong and inexpensive, but they have many parts and welding points, so there are many processing steps and the appearance is not beautiful. Hubs cast from materials such as aluminum alloys have good integrity and beautiful appearance, but they are expensive and the rim part has limited strength, which can easily damage the rim part when using tools to disassemble and install tires. In order to overcome the shortcomings of both, composite hubs have appeared in recent years, for example, composed of iron rims and aluminum alloy spokes, with iron inserts embedded in the outer ends of the spokes, and welding to the rim is achieved through the inserts.

[0003] In the manufacturing process of such a composite wheel hub, it is necessary to first place multiple inserts into the mold cavity of the spoke mold at the position corresponding to the outer end of the spoke, and then inject casting material (such as aluminum alloy melt) into the mold cavity for die casting, so as to form a spoke with inserts combined at the end of each spoke. In the above process steps, the flow of casting material in the mold cavity will drive the insert, so that the position of the insert in the mold cavity is offset or skewed relative to its predetermined position, resulting in the position accuracy of the insert in the finished spoke is not ideal. In the subsequent rim and spoke welding step, the position accuracy of the insert will lead to welding quality problems. For example, the actual position of the insert in the spoke is slightly skewed relative to its ideal position. When one end of the insert contacts the inner side of the rim, the other end has a large gap with the inner side of the rim. Then, the width and welding strength of the welding parts at both ends of the insert will be inconsistent. A thin casting layer will be attached to the surface of one end of the insert with a larger gap. This layer will also cause welding quality problems, thereby affecting the yield rate of the composite wheel hub. Utility Model Content

[0004] The utility model is designed to solve the above problems, and aims to provide a mold that can more efficiently manufacture the spokes of a composite hub and make the spokes more precise. The utility model adopts the following technical solutions:

[0005] The utility model provides a spoke forming mold for manufacturing spokes of a composite wheel hub, wherein the outer end of each spoke of the spoke is embedded with an insert for fixing to the rim, and the mold has the following technical features, comprising: a movable mold and a fixed mold that match each other, wherein the middle part of the fixed mold has a runner hole, and the movable mold has a plurality of spoke forming grooves that are respectively connected to the runner holes when the molds are closed, and are used to form the spokes, and the spoke forming grooves have an insert positioning portion for positioning the position of the insert in the spoke forming grooves, and the insert positioning portion has an insert positioning groove for embedding the insert, and one side of the insert positioning groove has a lateral opening, and the opening direction of the lateral opening is toward the middle part of the movable mold.

[0006] The spoke forming mold provided by the utility model may also have such technical features, wherein the spoke forming groove body is U-shaped, the two ends of the U-shape are located in the middle of the movable mold, the bottom of the U-shape is located at the corner or edge of the movable mold, and the insert positioning groove is arranged at the bottom of the U-shape of the spoke forming groove body.

[0007] The spoke forming mold provided by the utility model may also have such technical features, wherein the movable mold has an overflow groove portion, the overflow groove portion has an overflow limiting protrusion adjacent to the U-shaped bottom of the spoke forming groove body, and a pair of insert limiting protrusions connected to one side of the overflow limiting protrusion are formed at the U-shaped bottom of the spoke forming groove body, the spacing between the pair of insert limiting protrusions corresponds to the overall length of the insert, and the insert positioning groove is formed between one side of the overflow limiting protrusion and the pair of insert limiting protrusions.

[0008] The spoke forming mold provided by the utility model may also have such technical features, wherein 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, and 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.

[0009] The spoke forming mold provided by the utility model may also have such technical features, wherein the insert has a sheet portion in the form of an arc-shaped sheet, the end face is the outer surface of the sheet portion, the sheet portion also has one or more combining holes, and a side groove wall of the insert positioning groove also has one or more engaging protrusions corresponding to the combining holes, formed in the insert matching sub-groove.

[0010] The spoke forming mold provided by the utility model may also have such a technical feature, wherein the insert limiting protrusion is in the shape of a rectangular plate with rounded corners, and the protrusion height is smaller than the groove depth at the bottom of the U-shaped spoke forming groove body.

[0011] The spoke forming mold 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.

[0012] The spoke forming mold provided by the utility model may also have such technical features, and also includes: a core, having a core forming end face and a core column portion, wherein the middle portion of the movable mold has an installation matching hole matching the core, and the core is embedded in the installation matching hole, the spoke also has a spoke plate portion located in the middle, the spoke plate portion has a convex surface and a concave surface, the middle portion of the spoke plate portion has a center hole, the core forming end face is used to form the concave surface of the spoke plate portion, the core column portion is used to form the center hole, and the fixed mold also has a spoke plate convex surface forming groove for forming the convex surface of the spoke plate portion and a spoke forming matching groove body corresponding to the multiple spoke forming groove bodies.

[0013] The utility model provides a spoke manufacturing device for manufacturing spokes of a composite wheel hub, wherein the ends of each spoke of the spoke are embedded with inserts for welding with a rim, and the device has the following technical features, comprising: a die-casting machine; and a spoke forming mold, which is arranged in the die-casting machine and cooperates with the die-casting machine to manufacture the spokes, wherein the spoke forming mold is the above-mentioned spoke forming mold.

[0014] The utility model provides a wheel hub manufacturing equipment, which is used to manufacture a composite wheel hub, wherein the composite wheel hub has a rim and spokes made of different materials. The equipment has the following technical features, which include: a spoke manufacturing device, which is used to manufacture the spokes, wherein the outer end of each spoke is embedded with an insert for fixing to the rim; and a press-fit welding device, which is used to press-fit the spoke into the inner ring of the rim and weld the inserts at the outer end of the spoke to the rim respectively, so as to form the composite wheel hub, wherein the spoke manufacturing device is the above-mentioned spoke manufacturing device.

[0015] Function and effect of utility model

[0016] According to the present invention, the spoke forming mold, spoke manufacturing device and composite wheel hub manufacturing equipment include a movable mold and a fixed mold, wherein the movable mold is provided with an insert positioning groove in the spoke forming groove body used to form the spokes, so that the insert can be positioned when the insert is placed, and the position of the insert in the mold can be maintained during the die-casting, thereby improving the position accuracy of the insert in the final finished spoke, so that the spoke and the rim can be better welded, and the quality of the composite wheel hub is improved. Specifically, a runner hole is provided in the middle of the fixed mold, the spoke forming groove body of the movable mold is connected to the runner hole, and the lateral opening of the insert positioning groove in the spoke forming groove body faces the middle of the movable mold, so that when the casting is injected into the mold cavity of the mold in the die-casting state through the runner hole for die-casting, the flow of the casting can be guided and restricted through the lateral opening, and the position of the insert in the spoke forming groove body can be maintained through the insert positioning groove when the casting flows, so as to avoid it being driven by the flow of the casting, thereby improving the position accuracy of the insert. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the spoke forming mold in the mold closing state in the embodiment of the utility model;

[0018] Figure 2 It is a three-dimensional diagram of the spoke forming mold in the embodiment of the utility model in the mold opening state;

[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 movable mold at different angles in the embodiment of the utility model;

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

[0022] Figure 6 It is a three-dimensional diagram of the fixed mold in the embodiment of the utility model;

[0023] Figure 7 is a three-dimensional diagram of an insert in an embodiment of the utility model;

[0024] Figure 8 It is a three-dimensional diagram of the insert at different angles in the embodiment of the utility model;

[0025] Fig. 9 It is a three-dimensional diagram of a movable mold with an insert placed in an embodiment of the utility model;

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

[0027] Fig.11is a cross-sectional view of a spoke forming die with an insert placed therein in an embodiment of the utility model;

[0028] Fig.12 yes Fig.11 Enlarged view of the inner part of the middle circle C;

[0029] Fig.13 It is a stereoscopic view of the finished spoke in the embodiment of the utility model.

[0030] Reference numerals:

[0031] 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

[0032] 11211; lateral opening 11211a; bottom surface of positioning groove 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 portion 1221; overflow matching groove 123; runner hole 124; fixed mold Mounting hole 128; fixed mold limiting hole 129; cavity 130; spoke plate forming cavity 131; spoke forming cavity 132; overflow cavity 133; exhaust channel 134; insert 200; first sheet portion 210; strip portion 211; special-shaped sheet portion 212; positioning end 2121; first combining through hole 2122; first combining notch 2123; arc-shaped connecting portion 220; arc-shaped bottom surface 221; second sheet portion 230; second combining through hole 231; second combining notch 232; arc-shaped outer end surface 233; spoke 300; spoke body 310; spoke plate portion 311; center hole 3111; spoke 312. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the utility model easy to understand, the spoke forming mold, spoke manufacturing device and composite hub manufacturing equipment of the utility model are specifically described below in combination with embodiments and drawings.

[0034] <Example>

[0035] This embodiment provides a spoke forming die, which is used to cooperate with a die-casting machine for die-casting, so as to manufacture spokes of a composite hub, and the outer end of each spoke of the spoke is pre-embedded with an insert for fixing with the rim. In this embodiment, a composite hub rim is an iron rim, and the spoke is an aluminum alloy spoke with pre-embedded iron inserts as an example for specific description. In an alternative solution, the rim and the spoke can also be made of other materials respectively, and the insert can also be made of other materials that can be effectively welded to the rim by conventional welding.

[0036] Figure 1 2 is a three-dimensional diagram of the spoke forming mold in the embodiment of the present invention in the mold closing state. Figure 2 It is a stereoscopic view of the spoke forming mold in the mold opening state in the embodiment of the utility model.

[0037] like Figure 1 and Figure 2 As shown, the spoke forming mold 100 includes a movable mold 110, a fixed mold 120 and a core (not shown in the figure), and the three cooperate to perform the die-casting of the above-mentioned spokes. The core is embedded in the mounting hole in the middle of the movable mold 110, and then the whole formed by the two is installed on the die-casting machine. The movable mold 110 and the fixed mold 120 are arranged relatively parallel on the die-casting machine. The die-casting machine can drive the movable mold 110 embedded with the core to move toward the fixed mold 120 for mold closing, and can drive the movable mold 110 embedded with the core to move in a direction away from the fixed mold 120 for mold opening. In the mold closing state, a cavity for injecting castings and molding the spokes is formed between the parting surface of the movable mold 110, the end surface of the core and the parting surface of the fixed mold 120.

[0038] Figure 3 : is a three-dimensional diagram of the movable mold in this embodiment, Figure 4 2 is a stereogram of the movable mold at different angles in this embodiment. Figure 5 yes Figure 3 Enlarged view of the part within the middle circle A.

[0039] like Figures 3 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] Figure 6 It is a three-dimensional diagram of the fixed mold in this embodiment.

[0059] like Figure 6 As shown, 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] Figure 7 is a three-dimensional diagram of the insert in this embodiment, Figure 8 It is a stereoscopic view of the insert at different angles in this embodiment.

[0067] like Figure 7 and Figure 8As shown, the insert 200 is formed integrally by a bent sheet, and its cross section in the length direction is U-shaped. The insert 200 can be roughly divided into a first sheet portion 210, an arc-shaped connecting portion 220 and a second sheet portion 230 along its bending direction.

[0068] The first sheet portion 210 is in the shape of a slightly curved irregular sheet, including a strip portion 211 in the shape of a rectangular strip, two irregular sheet portions 212 extending from one side of the strip portion 211 in the width direction, and a notch formed between the two irregular sheet portions 212. The outer end of each irregular sheet portion 212 is a triangular sheet-shaped positioning end portion 2121. Each irregular sheet portion 212 has a first circular through hole 2122 for combination running through the middle, and a first notch 2123 for combination in the shape of a rounded square on one side.

[0069] The arc-shaped connecting portion 220 is connected between the first sheet portion 210 and the second sheet portion 220, and its two ends in the width direction are bent portions. The outer side of the arc-shaped connecting portion 220 forms an arc-shaped bottom surface 221. The arc-shaped bottom surface 221 is a quadratic surface, has an arc along its length direction, and has 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 221.

[0070] The second sheet portion 230 is in the shape of a strip with a slight curvature as a whole. Three circular second through holes 231 for combination are distributed on the second sheet portion 230. The shape and arrangement of the three engaging protrusions 11341 match the three second through holes 231 for combination. The second sheet portion 230 has a second square-shaped notch 232 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 230. The curvature of the groove bottom surface matches the curvature of the arc-shaped outer end surface 233 of the second sheet portion 230.

[0071] Fig. 9 is a three-dimensional diagram of the movable mold with the insert placed in this embodiment, Fig.10 yes Fig. 9 The enlarged view of the part inside the middle circle B, Fig.11 is a cross-sectional view of the spoke forming mold with the insert placed in this embodiment, Fig.12 yes Fig.11 Enlarged view of the inner part of circle C.

[0072] like Figures 9 to 12As shown, in the mold opening state, the insert 200 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 mold cavity 130, and the mold 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).

[0073] 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 channel 314 is formed by the corresponding overflow groove portion 113, the exhaust groove 115, the overflow matching groove 123 and the end face of the fixed mold 120. From the cross-section, the height of the exhaust channel 314 (the height on the mold thickness) is very small.

[0074] 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.

[0075] Among them, in the mold open state, when the insert 200 is placed on the insert positioning part 1121 of the movable mold 110, its arc-shaped bottom surface 221 is roughly in contact with the bottom surface 11211b of the positioning groove of the insert positioning groove 11211, and the outer side surface of the second sheet portion 230 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 231, and a pair of insert limiting protrusions 11212 are respectively in contact or abutment with both sides of the length direction of the insert 200, so that the insert 200 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.

[0076] In the mold closing state, the insert 200 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 221 of the insert 200 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 200 respectively abut against the bottom surface of the spoke-forming matching groove body 122 of the fixed mold 120, thereby further fixing the insert 200 and making it less likely to be displaced.

[0077] When molten metal is injected into the cavities of the movable mold 110 and the fixed mold 120 for die casting, the molten metal flows in the directions indicated by the arrows D1 and D2 in the figure in sequence. At the insert positioning portion 1121 where the insert 200 is placed, the molten metal flows in the directions indicated by D2 to D4 at the same time, filling the spoke forming cavity 132 around the insert 200, thereby forming spokes that wrap around the insert 200. At this time, since the insert 200 is embedded in the insert matching sub-groove 11211c and the fitting protrusion 11211d is embedded in the multiple second combination holes of the insert 200, the molten metal flowing along the D2 direction cannot push the insert 200 in this direction; since the insert 200 is stuck between a pair of insert limiting protrusions 11212, the molten metal flowing along the D3 and D4 directions cannot push the insert 200 in the corresponding directions; and since the insert 200 is pressed by the bottom surface 11211b of the positioning groove of the movable mold 110 and the bottom of the spoke forming matching groove body 122 of the fixed mold 120, the flow of the molten metal cannot cause the insert to float up and down or tilt in the thickness direction of the mold. Therefore, during the die casting process, the insert 200 will always maintain its predetermined position in the cavity.

[0078] Fig.13 It is a stereogram of the finished spoke in this embodiment.

[0079] like Fig.13 As shown, the spoke 300 manufactured by the spoke forming mold 100 includes a spoke body 310 made of aluminum alloy and a plurality of inserts 200. The spoke body 310 has a spoke plate portion 311 located in the middle and a plurality of spokes 312 extending radially outward from the edge of the spoke plate portion 311. An insert 200 is embedded at the outer end of each spoke 312. Most of the insert 200 is embedded in the outer end of the spoke 312. Only the outer side surface of the second sheet portion 230 and a small part of the arc bottom surface 221 are exposed outside the spoke 312 for welding. Since the mold has the insert positioning portion 1121, the positioning of each insert 200 relative to the outer end of the corresponding spoke 312 is very accurate, and the outer peripheral size accuracy of the finished spoke 300 is high.

[0080] This embodiment also provides a spoke manufacturing device, including the above-mentioned spoke forming mold 100, a die-casting machine, an automatic soup feeder, and an insert pre-positioning mechanism. The spoke forming mold 100 is installed on the die-casting machine, and is driven by the die-casting machine to open and close the mold. The die-casting machine can be a horizontal die-casting machine. The automatic soup feeder is used to automatically supply molten metal to the die-casting machine, and the die-casting machine then injects the molten metal into the cavity 130 of the spoke forming mold 100 in the closed mold state, and keeps the temperature and pressure for a predetermined time for die casting. The insert pre-positioning mechanism is used to arrange the plurality of the above-mentioned inserts 200 to be consistent with the arrangement of the plurality of inserts 200 in the finished spoke, and put the arranged plurality of inserts 200 into the plurality of insert positioning parts 1121 of the movable mold 110 of the spoke forming mold 100 in the open mold state to improve production efficiency. The die-casting machine, the automatic soup feeder, and the insert pre-positioning mechanism can adopt the structures in the prior art, which will not be described in detail.

[0081] This embodiment also provides a manufacturing device for a composite wheel hub, which includes the above-mentioned spoke manufacturing device, rim manufacturing device, and press-fit welding device. Among them, the rim manufacturing device rolls the iron strip to form an iron ring, and further spins and punches the iron ring to form an iron rim. The press-fit welding device is used to press the above-mentioned aluminum alloy spoke 300 into the corresponding inner ring of the rim, and weld between each iron insert 200 and the middle part of the inner side of the iron rim, so as to fix the spoke 300 to the inner ring of the rim to form a composite wheel hub. The rim manufacturing device and the press-fit welding device can adopt the structure in the prior art, which will not be described in detail.

[0082] Functions and Effects of the Embodiments

[0083] The spoke forming mold, spoke manufacturing device and composite wheel hub manufacturing equipment provided in this embodiment include a movable mold and a fixed mold, wherein the movable mold is provided with an insert positioning groove in the spoke forming groove body for forming spokes, so that the insert can be positioned when the insert is placed, and the position of the insert in the mold can be maintained during die casting, thereby improving the position accuracy of the insert in the final finished spoke, so that the spoke and the rim can be better welded, and the quality of the composite wheel hub is improved. Specifically, a runner hole is provided in the middle of the fixed mold, the spoke forming groove body of the movable mold is connected to the runner hole, and the lateral opening of the insert positioning groove in the spoke forming groove body faces the middle of the movable mold, so when the molten metal is injected into the mold cavity of the mold in the mold closing state through the runner hole for die casting, the flow of the molten metal can be guided and restricted through the lateral opening, and the position of the insert in the spoke forming groove body can be maintained through the insert positioning groove when the molten metal flows, so that it is prevented from being driven by the flow of the molten metal, thereby improving the position accuracy of the insert.

[0084] In the embodiment, the spoke forming groove body is U-shaped, the insert positioning groove is arranged at the bottom of the U-shape, and the insert positioning groove is a three-sided surrounding structure. Except for the side opening, the other three sides are provided with protrusions. Therefore, when the molten metal flows to the insert, the position of the insert can be maintained to prevent the insert from being displaced or skewed.

[0085] Furthermore, the insert is a sheet-like piece with a U-shaped cross-section, and the insert limiting protrusions on both sides of the insert positioning groove have a relatively low protrusion height, which is less than the depth of the spoke forming groove body. Therefore, during die-casting, the molten metal can also be injected into the middle of the insert from both sides of the insert positioning groove, which improves the die-casting efficiency while also avoiding the displacement or skewing of the insert caused by the flow of molten metal in this direction through the insert limiting protrusions on both sides.

[0086] Furthermore, one side wall of the insert positioning groove also has an insert matching sub-groove and a plurality of matching protrusions, which can be matched with a sheet portion of the insert, so that the insert is less likely to be driven by the flow of the molten metal, and the positioning effect is better. And because the groove depth of the insert matching sub-groove is very shallow and the protrusion height of the matching protrusion is also small, while achieving a better positioning effect, it will not affect the placement of the insert, and the insert can still be easily placed in the insert positioning groove.

[0087] Furthermore, when the molds are closed, the insert can be pressed down by the bottom surface of the positioning groove on the movable mold and the spoke-shaped bottom surface of the groove body on the fixed mold, thereby further avoiding the flow of molten metal during the die-casting process causing the insert to be displaced or tilted in the thickness direction of the mold, thereby achieving a better positioning effect on the insert.

[0088] Furthermore, the movable mold also has an overflow groove and an exhaust groove. The movable mold also has an overflow matching groove matching therewith, so that the gas in the cavity can be quickly drawn out during the die-casting process, reducing the occurrence of air entanglement, shrinkage holes, etc. during the filling process, so that the combination between the spoke ends of the molded spokes and the inserts is better, and there is no empty bag at the spoke ends, thereby making the overall strength of the finished composite hub higher.

[0089] Furthermore, the movable mold also has multiple push holes, all of which are located close to the insert positioning groove. Therefore, after the die-casting is completed, the multiple push holes can be used to push out the formed spokes, which is more convenient for removing the parts. In addition, the outer end of the spoke embedded with the insert is relatively strong, and it is not easy to damage the finished spokes when pushing at this position.

[0090] Furthermore, the movable mold also has a plurality of insert mounting holes, which can be conveniently set and replaced with corresponding inserts to form protrusions of manufacturer's words, model words, batch words, etc. on the spokes without having to process these words in subsequent steps, making production more efficient.

[0091] 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.

[0092] For example, in the above embodiment, the movable mold has five spoke forming grooves, each of which is in an axisymmetric U-shape. In an alternative solution, the spoke forming grooves may have other numbers according to the actual required spoke shape, and the shape of each spoke forming groove may also be other shapes, which may be axisymmetric or non-axisymmetric. The insert positioning portion is arranged at one end of the spoke forming groove away from the center of the movable mold, which can also achieve the corresponding technical effect.

[0093] In the above embodiment, since the molten metal is injected from the runner hole in the middle, the insert positioning groove is open on one side toward the middle of the mold and surrounded on the other three sides. In an alternative solution, the mold may also adopt a runner design in other prior arts, with the lateral opening of the insert positioning groove facing the corresponding direction of molten metal inflow, which can also achieve the corresponding technical effect.

[0094] In the above embodiment, the insert is in the form of a U-shaped sheet. In an alternative solution, the insert may also be in other shapes, such as a rounded L-shaped sheet or a question mark-shaped sheet, etc., as long as the insert has the above-mentioned arc-shaped bottom surface and end surface.

[0095] In the above embodiment, the core has a columnar portion for forming the center hole of the spoke. In an alternative solution, the core may be of other shapes, and the center hole may not be formed first during the die-casting process, but may be further processed in a subsequent step.

[0096] In the above embodiment, the mold is used to inject aluminum alloy melt to hydraulically cast aluminum alloy spokes, and the insert is an iron part. In an alternative solution, the insert can also be made of other materials that can be effectively welded to the rim by conventional welding methods, and the spokes can also be made of other materials suitable for die casting, such as aluminum-magnesium alloy.

Claims

1. A spoke forming mold, used for injecting castings to form spokes, wherein each spoke end of the spoke is embedded with an insert, wherein the insert has an arc-shaped bottom surface and an arc-shaped and convex end surface, characterized in that: include: The movable mold and fixed mold match each other. Wherein, the middle part of the fixed mold has a runner hole, The movable mold has a plurality of spoke forming grooves respectively connected to the runner holes when the mold is closed, and is used to form the spokes. The spoke forming groove body is provided with an insert positioning portion for positioning the insert in the spoke forming groove body. The insert positioning portion has an insert positioning groove for embedding the insert. One side of the insert positioning groove is provided with a lateral opening, and the opening direction of the lateral opening is toward the middle part of the movable mold.

2. The spoke forming mold according to claim 1, characterized in that: in, The spoke forming groove is in a U shape, with both ends of the U shape located in the middle of the movable mold, and the bottom of the U shape located at the corner or edge of the movable mold. The insert positioning groove is arranged at the U-shaped bottom of the spoke forming groove body.

3. The spoke forming mold according to claim 2, characterized in that: in, The movable die has an overflow groove portion, and the overflow groove portion has an overflow limiting protrusion adjacent to the U-shaped bottom of the spoke forming groove body. A pair of insert limiting protrusions connected to one side of the overflow limiting protrusion are formed at the bottom of the U-shaped spoke forming groove body, and the spacing between the pair of insert limiting protrusions corresponds to the overall length of the insert. The insert positioning groove is formed on one side of the overflow limiting protrusion and between the pair of insert limiting protrusions.

4. The spoke forming mold according to claim 3, characterized in that: in, 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.

5. The spoke forming mold according to claim 4, characterized in that: in, The insert has a sheet-like portion in an arc-shaped sheet, and the end surface is the outer surface of the sheet-like portion. The sheet portion also has one or more coupling holes. A groove wall on one side of the insert positioning groove also has one or more engaging protrusions corresponding to the combining hole, which are formed in the insert matching sub-groove.

6. The spoke forming mold according to claim 3, characterized in that: in, The insert limiting protrusion is in the shape of a rectangular plate with rounded corners, and the protrusion height is smaller than the groove depth at the bottom of the U-shaped spoke forming groove body.

7. The spoke forming mold according to claim 1, 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.

8. The spoke forming mold according to claim 1, characterized in that: Also includes: The core has a core forming end surface and a core column portion, The middle part of the movable mold has a mounting hole matching the core, and the core is embedded in the mounting hole. The spoke also has a spoke plate portion located in the middle, the spoke plate portion has a convex surface and a concave surface, and the middle of the spoke plate portion has a central hole. The core molding end surface is used to form the concave surface of the web portion, The core column portion is used to form the center hole. The fixed mold further comprises a spoke plate convex surface forming groove for forming the convex surface of the spoke plate portion and a spoke forming matching groove body corresponding to the plurality of spoke forming groove bodies.

9. A wheel spoke manufacturing device for manufacturing wheel spokes, wherein the ends of each spoke of the wheel spoke are embedded with inserts for welding to the rim, characterized in that: include: Die casting machine; as well as The spoke forming die is arranged in the die casting machine and is used for cooperating with the die casting machine to manufacture the spoke. Wherein, the spoke forming mold is the spoke forming mold according to any one of claims 1-8.

10. A wheel hub manufacturing device for manufacturing a composite wheel hub, wherein the composite wheel hub has a rim and spokes made of different materials, characterized in that: include: A spoke manufacturing device for manufacturing the spokes; as well as A welding device is used to weld the inserts at the ends of each spoke of the wheel to the rim to form the composite wheel hub, Wherein, the spoke manufacturing device is the spoke manufacturing device according to claim 9.

Images