Improved aluminum alloy wheel spinning forming die

Abstract

The utility model discloses an improved aluminum alloy wheel spinning forming die which comprises an upper die and a lower die, a material ejection forming groove is formed in the middle of the top face of the lower die, a material ejection forming block is inserted in the material ejection forming groove in a sleeved mode, and the bottom face of the material ejection forming block abuts against the bottom face of the material ejection forming groove in a pressing mode. A vertical stepped through hole extending downwards is formed in the middle of the bottom face of the ejection forming groove, and the bottom end of the vertical stepped through hole extends out of the bottom face of the lower die. The central axis of the upper die and the central axis of the ejection forming block can be guaranteed to coincide basically, the concentricity of the upper die and the ejection forming block can be guaranteed, the inner end of the rim at the bottom of the hub can be guaranteed to have enough machining allowance, the bottom face of the outer end of the rim is a plane, and the flatness quality of the bottom face of the rim at the bottom of the hub in the heat treatment procedure after spinning of the hub can be guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to wheel hub processing equipment technical field more specifically relates to an improved aluminum alloy wheel spinning forming die. BACKGROUND

[0002] With the proportion of new energy vehicles more and more big, the wheel light weight and high strength, high quality wheel become the common subject of everybody's research, spinning technology is widely used in the wheel industry, has become a very important process in the wheel production process.

[0003] Conventional spinning wheel inner rim forming is insufficient, such as Figure 1 As shown, the inner end of the wheel hub's bottom rim is a plane, which makes the subsequent machining allowance very small, so that the post-processing is slightly too large due to insufficient allowance, and the size cannot meet the design requirements and is scrapped; moreover, the outer end of the bottom rim extends vertically downward, and the bottom end surface is not flat, so that the flatness is not ideal in the later stage.

[0004] At the same time, the existing top material forming block on the upper die and the lower die does not have a center alignment positioning mechanism, so that there is a small deviation when the upper die and the top material forming block are pressed together, that is, the concentricity of the vertical lines of the two centers is not ideal, which affects the subsequent spinning forming effect. UTILITY MODEL CONTENTS

[0005] The utility model aims at overcoming the prior art's shortcomings, providing an improved aluminum alloy wheel spinning forming die, which can ensure that the center axis of the upper die and the top material forming block are basically coincident, ensure the concentricity, make the pressing positioning accurate, and at the same time, it can ensure that the inner end of the wheel hub's bottom rim has sufficient machining allowance, and the outer end bottom surface of this rim is a plane, which can ensure the flatness quality of the bottom surface of the wheel hub's bottom rim during the wheel hub spinning heat treatment process.

[0006] The utility model solves the technical problem by the following scheme:

[0007] An improved aluminum alloy wheel spinning forming die, comprising an upper die and a lower die, a top material forming groove is formed in the middle part of the top surface of the lower die, a top material forming block is inserted into the top material forming groove, the bottom surface of the top material forming block is pressed against the bottom surface of the top material forming groove, a vertical stepped through hole extending downward is formed in the middle part of the bottom surface of the top material forming groove, the bottom end of the vertical stepped through hole protrudes from the bottom surface of the lower die, the lower part of the vertical stepped through hole is a large diameter hole section, a top material rod is inserted into the vertical stepped through hole, the outer side wall of the top material rod is close to the inner side wall of the small diameter hole section of the upper part of the vertical stepped through hole, and the top end of the top material rod is fixedly connected to the middle bottom surface of the top material forming block by bolts.

[0008] The top surface of the top material forming block is formed with a lower forming groove, the upper die is above the lower forming groove, the middle part of the top surface of the upper die is formed with a downward extending upper stepped through hole, the upper part of the center guide shaft is at the upper stepped through hole and is fixedly connected to the upper die through bolts, the lower part of the center guide shaft extends out of the bottom small diameter hole section of the upper stepped through hole and is inserted into a center positioning through hole formed in the middle part of the bottom surface of the lower forming groove, and the outer side wall of the lower part of the center guide shaft is tightly attached to the inner side wall of the center positioning through hole.

[0009] The inner side wall of the upper part of the top material forming groove is a tapered wall surface, the bottom surface edge of the top material forming groove is formed with a plurality of downward extending positioning holes, the outer side wall of the upper part of the top material forming block is tightly attached to the inner side wall of the upper part of the top material forming groove, the top material forming block cooperates with the top material forming groove, and the guide rod fixedly arranged on the bottom surface of the top material forming block is inserted into the corresponding positioning hole.

[0010] The outer side wall of the lower die is an outer spinning forming wall surface, and the bottom end outer side wall is formed with a radially extending buffer support part.

[0011] The top surface of the inner side of the buffer support part is formed with an upward extending annular protruding ring, and the top surface of the inner side of the annular protruding ring is formed with an annular groove.

[0012] The prominent effect of the utility model is:

[0013] It can make the center axes of the upper die and the top material forming block basically coincide through the center guide shaft, ensure the concentricity, make the pressing and positioning accurate, can ensure that the inner end of the bottom flange of the hub has sufficient machining allowance, and the outer end bottom surface of the flange is a plane, and the flatness quality of the bottom surface of the bottom flange of the hub during the heat treatment process after spinning can be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a partial structure schematic view of the prior art die;

[0015] Figure 2 is a partial structure schematic view of the utility model;

[0016] Figure 3 is Figure 2 a partial enlarged view of DETAILED DESCRIPTION

[0017] Embodiment, see as Figures 2 to 3As shown, an improved aluminum alloy wheel spinning forming die comprises an upper die 10 and a lower die 20, a top material forming groove is formed in the middle of the top surface of the lower die 20, a top material forming block 30 is inserted into the top material forming groove, the bottom surface of the top material forming block 30 is pressed against the bottom surface of the top material forming groove, the middle of the bottom surface of the top material forming groove is formed with a downward extending vertical stepped through hole 21, the bottom end of the vertical stepped through hole 21 extends out of the bottom surface of the lower die 20, the lower part of the vertical stepped through hole 21 is a large diameter hole section, a top material rod 40 is inserted into the vertical stepped through hole 21, the outer side wall of the top material rod 40 is close to the inner side wall of the small diameter hole section of the upper part of the vertical stepped through hole 21, an extension guide part 49 is formed on the bottom outer side wall of the top material rod 40, the extension guide part 49 is inserted into the small diameter hole section of the lower part of the vertical stepped through hole 21, and the outer side wall thereof is close to the inner side wall of the small diameter hole section of the lower part of the vertical stepped through hole 21, and the top end of the top material rod 40 is fixedly connected to the middle bottom surface of the top material forming block 30 by bolts;

[0018] The top surface of the top material forming block 30 is formed with a lower forming groove, the upper die 10 is above the lower forming groove, the middle part of the top surface of the upper die 10 is formed with a downward extending upper stepped through hole 11, the upper part of the center guide shaft 50 is connected at the upper stepped through hole 11 and is fixedly connected to the upper die 10 by bolts, the lower part of the center guide shaft 50 extends out of the small diameter hole section of the bottom of the upper stepped through hole 11 and is inserted into the center positioning through hole 31 formed in the middle of the bottom surface of the lower forming groove, and the lower part outer side wall of the center guide shaft 50 is close to the inner side wall of the center positioning through hole 31.

[0019] Further, the center positioning through hole 31 is aligned with and corresponds to the top extension hole 41 formed in the middle of the top surface of the top material rod 40.

[0020] Further, the upper inner side wall of the top material forming groove is a tapered wall surface, the bottom edge of the bottom surface of the top material forming groove is formed with a plurality of downward extending positioning holes, the upper outer side wall of the top material forming block 30 is close to the upper inner side wall of the top material forming groove, the top material forming block 30 cooperates with the top material forming groove, and the fixed guide rod 32 of the bottom surface of the top material forming block 30 is inserted into the corresponding positioning hole.

[0021] Further, the upper stepped through hole 11 comprises a top large diameter hole section, a middle hole section and a bottom small diameter hole section, the inner diameter of the middle hole section is larger than that of the bottom small diameter hole section and smaller than that of the top large diameter hole section.

[0022] The outer diameter of the upper connecting part of the center guide shaft 50 is larger than the outer diameter of the center guide shaft 50, the upper connecting part is inserted into the middle hole section, the bottom surface thereof is pressed against the bottom end surface of the middle hole section and is fixedly connected by bolts, and the outer side wall of the upper connecting part is close to the inner side wall of the middle hole section.

[0023] The outer side wall of the lower die 20 is an outer spinning forming wall, and a radially extending buffer support part 22 is formed on the bottom end outer side wall.

[0024] An annular raised ring 23 extending upward is formed on the top surface of the inner side of the buffer support part 22, and an annular groove 24 is formed on the top surface of the inner side of the annular raised ring 23.

[0025] In the embodiment, the lower part of the center guide shaft 50 extends out of the bottom small diameter hole section of the upper stepped through hole 11 and is inserted into the center positioning through hole 31 formed in the middle part of the bottom surface of the lower forming groove, and the lower part outer side wall of the center guide shaft 50 is in close contact with the inner side wall of the center positioning through hole 31, so that the positioning between the upper die 10 and the top material forming block 30 is accurate, the center axes of the two are basically coincident, and the concentricity is ensured.

[0026] Moreover, the radially extending buffer support part 22 is formed on the bottom end of the outer side wall of the lower die 20, and the top surface is a plane, so that the outer end top surface of the bottom flange of the formed hub 100 is a plane during spinning, and the flatness quality of the bottom surface of the bottom flange of the hub 100 during the heat treatment process after spinning of the hub 100 is ensured.

[0027] The top surface of the inner side of the buffer support part 22 is formed with the annular raised ring 23 extending upward, and the top surface of the inner side of the annular raised ring 23 is formed with the annular groove 24, so that the top surface of the inner end of the bottom flange of the hub 100 after spinning of the hub 100 is formed with the upper annular raised part 101 extending downward, the machining allowance at the position is increased, and the subsequent machining effect is ensured, and the machining is not easy to be scrapped.

[0028] After machining, the upper die 10 is lifted, the top material rod 40 is connected to the top material oil cylinder through the bottom part of the top material rod 40, the top material rod 40 is lifted by the push rod of the top material oil cylinder, the top material forming block 30 is lifted, the hub 100 thereon is lifted, the separation of the hub 100 from the lower die 20 is realized, and the demolding is facilitated.

[0029] The above only describes the preferred embodiments of the present application, and it should be pointed out that, for ordinary skilled persons in the technical field, some improvements and decorations can be made without departing from the technical principles of the present application, and these improvements and decorations should also be regarded as the protection scope of the present application.

Claims

1. An improved aluminum alloy wheel spinning forming die comprising an upper die (10) and a lower die (20), characterized in that: The lower mold (20) has a top surface with a top forming groove in the middle. The top forming block (30) is inserted into the top forming groove. The bottom surface of the top forming block (30) is pressed against the bottom surface of the top forming groove. The bottom surface of the top forming groove has a vertical stepped through hole (21) extending downward in the middle. The bottom end of the vertical stepped through hole (21) extends out of the bottom surface of the lower mold (20). The lower part of the vertical stepped through hole (21) is a large diameter hole section. The top forming rod (40) is inserted into the vertical stepped through hole (21). The outer side wall of the top forming rod (40) is close to the inner side wall of the small diameter hole section at the top of the vertical stepped through hole (21). The top end of the top forming rod (40) is fixedly connected to the bottom surface of the top forming block (30) in the middle by bolts. The top surface of the top forming block (30) is formed with a lower forming groove. The upper mold (10) is located above the lower forming groove. The upper mold (10) has a downward-extending upper stepped through hole (11) formed in the middle of the top surface. The upper connecting part of the central guide shaft (50) is located at the upper stepped through hole (11) and is fixedly connected to the upper mold (10) by bolts. The lower part of the central guide shaft (50) extends out of the bottom small diameter hole section of the upper stepped through hole (11) and is inserted into the central positioning through hole (31) formed in the middle of the bottom surface of the lower forming groove. The lower outer side wall of the central guide shaft (50) is close to the inner side wall of the central positioning through hole (31). The outer wall of the lower mold (20) is an external spin forming wall, and a radially extending buffer support part (22) is formed on its bottom outer wall. The inner side of the buffer support (22) has an upwardly extending annular protrusion (23) formed on the top surface, and the inner side of the annular protrusion (23) has an annular groove (24) formed on the top surface.

2. The improved aluminum alloy wheel spinning forming die of claim 1 wherein: The central positioning through hole (31) is aligned and corresponds to the top extension hole (41) formed in the middle of the top surface of the top material rod (40).

3. The improved aluminum alloy wheel spinning forming die of claim 1 wherein: The upper inner wall of the top forming groove is a conical wall. The bottom edge of the top forming groove is formed with multiple downwardly extending positioning holes. The upper outer wall of the top forming block (30) is in close contact with the upper inner wall of the top forming groove. The top forming block (30) cooperates with the top forming groove. The guide rod (32) fixed on the bottom surface of the top forming block (30) is inserted into the corresponding positioning hole.

4. The improved aluminum alloy wheel spinning forming die of claim 1 wherein: The upper stepped through hole (11) includes a top large-diameter hole section, a middle hole section and a bottom small-diameter hole section, wherein the inner diameter of the middle hole section is larger than that of the bottom small-diameter hole section but smaller than that of the top large-diameter hole section; The outer diameter of the upper connecting part of the central guide shaft (50) is larger than the outer diameter of the central guide shaft (50). The upper connecting part is inserted into the middle hole section, and its bottom surface is pressed against the bottom end face of the middle hole section and fixedly connected by bolts. The outer side wall of the upper connecting part is close to the inner side wall of the middle hole section.

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