Hot extrusion preforming tool and forming tool for wheel edge supporting shaft blank

Abstract

The utility model relates to a hot extrusion preforming tool and a forming tool for a wheel edge supporting shaft blank, which comprise a bottom die, an extrusion groove used for extruding the blank is arranged at the top of the bottom die; the pre-forming lower die is arranged in the extrusion groove, and a shaping groove used for blank extrusion pre-forming is formed in the middle of the pre-forming lower die; and the pressing cover is arranged at the top of the bottom die and used for pressing the pre-forming lower die, and a through hole used for avoiding the first pressing block is formed in the middle of the pressing cover. The utility model relates to the technical field of wheel edge supporting shaft manufacturing. According to the hot extrusion preforming tool and the hot extrusion forming tool for the wheel edge supporting shaft blank, through the arrangement of the preforming lower die, a steel blank piece can be preliminarily shaped, subsequent shaping machining is facilitated, the difficulty of directly extruding the steel blank piece into a wheel edge supporting shaft is lowered, and therefore the production efficiency of the wheel edge supporting shaft is improved; and the quality of the wheel edge supporting shaft is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of manufacturing of wheel side support shafts, in particular to a hot extrusion preforming tooling and a forming tooling for a blank of a wheel side support shaft. Background Art

[0002] The wheel side support shaft is mainly used for wheel side support at both ends of a drive axle of construction machinery vehicles (such as road rollers, excavators, loaders, etc.). It is welded to both ends of the axle housing and is used to connect the drive axle housing and the internal gear ring. The half shaft passes through the middle of the shaft tube. When in the working state, this part not only has to bear the self-weight of the vehicle but also the impact force and counter impact force brought by the road surface during driving. Therefore, it has relatively high requirements for mechanical properties, especially sufficient stiffness, wear resistance and seismic resistance, and it is a kind of safety component on construction machinery vehicles.

[0003] Because the wheel side support shaft is mostly used in heavy machinery and is a safety component of heavy machinery, it has relatively high strength requirements for itself, and its shape is relatively large, resulting in difficulty in completing extrusion in one go during extrusion forming, thus leading to a low yield rate of the production of the wheel side support shaft and difficulty in improving production efficiency. Content of the Utility Model

[0004] Aiming at the deficiencies existing in the prior art, the purpose of the utility model is to provide a hot extrusion preforming tooling and a forming tooling for a blank of a wheel side support shaft, so as to solve the technical problems mentioned in the above background art.

[0005] The above technical purpose of the utility model is achieved through the following technical solutions:

[0006] A hot extrusion preforming tooling for a blank of a wheel side support shaft, including a bottom die, on the top of which there is an extrusion groove for extruding the blank;

[0007] A preforming lower die, which is arranged in the extrusion groove and has a shaping groove in the middle for preforming the extrusion of the blank;

[0008] A gland, which is arranged on the top of the bottom die and is used for pressing the preforming lower die tightly, and there is a through hole in the middle of the gland for avoiding a first pressing block;

[0009] A first pressing block, which is arranged on the top of the gland, and a shallow punching head is formed by the protrusion at the bottom of the first pressing block, and an extrusion assembly is connected to the top;

[0010] A first electromagnetic heating ring is fixedly connected inside the preforming lower die, and a pressure contact switch for starting the first electromagnetic heating ring is connected to the top of the gland.

[0011] Further, a positioning post is fixedly connected to the inner bottom wall of the extrusion groove. An extrusion part is formed by the top of the positioning post protruding. A first positioning groove for sleeving the positioning post is opened at the bottom of the extrusion groove.

[0012] Further, the extrusion assembly includes a support post, a top plate, and a hydraulic press. A plurality of support posts are annularly arranged on the top of the gland. The top of the support post is fixedly connected to the top plate. The top of the top plate is fixedly connected to the hydraulic press. The output shaft of the hydraulic press penetrates through the top plate and is detachably connected to the first pressing block.

[0013] Further, a pressing plate for extruding the pressure contact switch is arranged on the top of the first pressing block. The pressing plate is slidably connected to the support post. The middle part of the pressing plate is slidably connected to the output shaft of the hydraulic press through a damper.

[0014] In summary, the present utility model includes at least one of the following beneficial technical effects:

[0015] 1. For the hot extrusion preforming tooling of the wheel side support shaft blank, by setting the preforming lower die, the steel blank can be preliminarily shaped, which is convenient for subsequent sizing processing, so as to reduce the difficulty of directly extruding the steel blank into the wheel side support shaft, thereby improving the production efficiency of the wheel side support shaft and enhancing the quality of the wheel side support shaft.

[0016] 2. For the hot extrusion preforming tooling of the wheel side support shaft blank, by setting the first electromagnetic heating ring and the pressure contact switch, the steel blank can be heated before shaping, so that the steel blank is heated and softened, which can effectively improve the shaping efficiency and thus improve the preforming efficiency.

[0017] A hot extrusion forming tooling for a wheel side support shaft blank, the hot extrusion forming tooling for the wheel side support shaft blank includes the hot extrusion preforming tooling for the wheel side support shaft blank, and further includes a second pressing block, the top of which is detachably connected to the output shaft of the hydraulic press and the bottom of which protrudes to form a deep drawing head;

[0018] A sizing lower die, which is placed in the extrusion groove and is provided with a sizing groove in the middle for extruding the preformed blank.

[0019] Further, a second positioning groove for sleeving the positioning post is opened at the bottom of the sizing lower die, and the second positioning groove is communicated with the sizing groove.

[0020] Further, a second electromagnetic heating ring is fixedly connected inside the sizing lower die.

[0021] In summary, the present utility model includes the following beneficial technical effects:

[0022] The hot extrusion forming tooling for the blank of the hub bearing shaft can extrude and form the preformed hub bearing shaft by setting a second pressing block and a sizing lower die, thereby completing the production of the hub bearing shaft, reducing the extrusion forming difficulty of the hub bearing shaft, and improving the production efficiency of the hub bearing shaft. Brief Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 It is a schematic structural diagram of the hot extrusion preforming tooling and the forming tooling for the blank of the hub bearing shaft of the present invention.

[0025] Figure 2 It is a schematic structural diagram of the hot extrusion preforming tooling and the forming tooling for the blank of the hub bearing shaft of the present invention during preforming.

[0026] Figure 3 It is a schematic structural diagram of the hot extrusion preforming tooling and the forming tooling for the blank of the hub bearing shaft of the present invention during sizing.

[0027] In the figure, 1, bottom die; 2, preforming lower die; 3, gland; 4, first pressing block; 5, extrusion groove; 6, shaping groove; 7, through hole; 8, shallow punching head; 9, extrusion assembly; 91, support column; 92, top plate; 93, hydraulic press; 10, first electromagnetic heating ring; 11, pressure contact switch; 12, positioning column; 13, extrusion part; 14, first positioning groove; 15, pressing plate; 16, second pressing block; 17, deep punching head; 18, sizing lower die; 19, sizing groove; 20, second positioning groove; 21, second electromagnetic heating ring; 22, preformed blank; 23, formed blank. Detailed Description of the Embodiments

[0028] The following will further elaborate on the present invention in conjunction with the drawings.

[0029] Embodiment:

[0030] Referring to Figure 1 - Figure 2 , a hot extrusion preforming tooling for the blank of the hub bearing shaft disclosed by the present invention includes a bottom die 1, and an extrusion groove 5 for extruding the blank is opened at the top thereof;

[0031] A preforming lower die 2 is arranged in the extrusion groove 5, and a shaping groove 6 for preforming the extrusion of the blank is opened in the middle thereof;

[0032] A gland 3 is arranged at the top of the bottom die 1 and is used to press the pre - forming lower die 2. A through - hole 7 for avoiding the first pressing block 4 is formed in the middle of the gland 3;

[0033] The first pressing block 4 is arranged at the top of the gland 3. A shallow punching head 8 is formed by the protrusion at the bottom of the first pressing block 4, and an extrusion assembly 9 is connected to the top;

[0034] A first electromagnetic heating ring 10 is fixedly connected inside the pre - forming lower die 2, and a pressure - contact switch 11 for starting the first electromagnetic heating ring 10 is connected to the top of the gland 3.

[0035] In this embodiment, the pre - forming lower die 2 is placed in the extrusion groove 5 of the bottom die 1, and then the steel blank is placed in the shaping groove 6 of the pre - forming lower die 2.

[0036] Subsequently, the gland 3 is placed on the top of the bottom die 1 and fastened by fasteners. Finally, the first pressing block 4 is connected to the extrusion assembly 9 to complete the preparation process for the extrusion forming of the wheel side support shaft.

[0037] After getting ready, press the pressure - contact switch 11 to make the first electromagnetic heating ring 10 operate to generate an alternating magnetic field to rapidly heat the steel blank. After the heating is completed, lower the first pressing block 4 through the extrusion assembly 9. Subsequently, the first pressing block 4 passes through the through - hole 7 reserved in the gland 3 and contacts the steel blank.

[0038] Because the steel blank softens under the action of high temperature, the first pressing block 4 will continuously press the steel blank under the pressure applied by the extrusion assembly 9, so that the outer wall of the steel blank fits with the shaping groove 6 due to deformation, thereby shaping the steel blank into a pre - formed blank 22.

[0039] After the steel blank is pressed into the pre - formed blank 22, it is necessary to replace the first pressing block 4 to further press the pre - formed blank 22. Therefore, it is necessary to disconnect the connection between the first pressing block 4 and the hydraulic press 93, so the first pressing block 4 and the output shaft of the hydraulic press 93 are detachably connected by means of threaded fastening or screw fastening, etc.

[0040] In a further preferred embodiment of the present utility model, as Figure 2 shown, a pressing part 13 is formed by the protrusion at the top of the positioning column 12, and a first positioning groove 14 for sleeving the positioning column 12 is formed at the bottom of the extrusion groove 5.

[0041] In this embodiment, the positioning posts 12 provided can cooperate with the first positioning grooves 14 of the preforming lower die 2, so that after the preforming lower die 2 is installed, it has a fixing effect on the preforming lower die 2. And an extrusion part 13 is arranged at the top of the positioning post 12, which can cooperate with the shallow punching head 8 at the bottom of the first pressing block 4 to punch small holes at the upper and lower ends of the preformed blank 22, so as to preform the inner hole of the wheel side support shaft.

[0042] In a further preferred embodiment of the present utility model, as Figure 2 shown, the extrusion assembly 9 includes a support column 91, a top plate 92 and a hydraulic press 93. A plurality of support columns 91 are arranged in a circular array at the top of the gland 3. The top of the support column 91 is fixedly connected to the top plate 92, and the top of the top plate 92 is fixedly connected to the hydraulic press 93. The output shaft of the hydraulic press 93 penetrates through the top plate 92 and is detachably connected to the first pressing block 4.

[0043] In this embodiment, by setting the hydraulic press 93, the first pressing block 4 can be pushed down by hydraulic pressure, so that the steel blank can be better extruded, and thus the steel blank can be efficiently shaped into a preformed blank.

[0044] In a further preferred embodiment of the present utility model, as Figure 2 shown, a pressing plate 15 for pressing the pressure switch 11 is arranged at the top of the first pressing block 4. The pressing plate 15 is slidably connected to the support column 91, and the middle part of the pressing plate 15 is slidably connected to the output shaft of the hydraulic press 93 through a damper.

[0045] In this embodiment, by setting the pressing plate 15, when the hydraulic press 93 pushes the first pressing block 4 down, the pressing plate 15 can move down together with the first pressing block 4, and then press the pressure switch 11 to make the first electromagnetic heating ring 10 heat the steel blank, so that the first pressing block 4 can efficiently extrude the steel blank into the preformed blank 22. And the pressing plate 15 is slidably connected to the output shaft of the hydraulic press 93 through a damper. After the preforming of the steel blank is completed, when the hydraulic press 93 drives the first pressing block 4 to rise, the pressing plate 15 can be directly lifted, and then the pressing plate 15 no longer presses the pressure switch 11, so that the first electromagnetic heating ring 10 stops heating the blank. Then, after the pressing plate 15 contacts the top plate 92, it is pressed and reset by the top plate 92, so that the pressure switch 11 can still be actively activated when the hydraulic press 93 is used next time.

[0046] Refer to Figure 1 - Figure 3, a hot extrusion forming tooling for a hub bearing shaft blank disclosed by the present utility model, the hot extrusion forming tooling for the hub bearing shaft blank includes a hot extrusion preforming tooling for the hub bearing shaft blank, and further includes a second pressing block 16, the top of which is detachably connected to the output shaft of a hydraulic press 93, and a deep drawing head 17 is formed by a protrusion at the bottom;

[0047] A sizing lower die 18, which is placed in an extrusion groove 5, and a sizing groove 19 for extruding a preformed blank 22 is provided in the middle.

[0048] In this embodiment, when in use, the preforming lower die 2 is taken out from the bottom die 1, then the sizing lower die 18 is placed in the bottom die 1, then the preformed blank 22 is placed in the sizing groove 19, and finally the first pressing block 4 is removed, and the second pressing block 16 is connected to the output shaft of the hydraulic press 93.

[0049] After getting ready, the hydraulic press 93 is pressed down to make the second pressing block 16 pass through the through hole 7 of the pressing cover 3 and contact the preformed blank 22. Subsequently, the deep drawing head 17 will insert into the preformed hole of the preformed blank 22. Under the extrusion of the second pressing block 16, the preformed blank 22 is extruded and deformed, and the preformed blank 22 is made to fit with the sizing groove 19 to form a formed blank 23, so as to complete the extrusion of the hub bearing shaft.

[0050] In a further preferred embodiment of the present utility model, as Figure 3 shown, a second positioning groove 20 for sleeving the positioning column 12 is provided at the bottom of the sizing lower die 18, and the second positioning groove 20 communicates with the sizing groove 19.

[0051] In this embodiment, by providing the second positioning groove 20, the sizing lower die 18 can be positioned by the positioning column 12 during installation, which can improve the installation efficiency of the sizing lower die 18.

[0052] In a further preferred embodiment of the present utility model, as Figure 3 shown, a second electromagnetic heating ring 21 is fixedly connected inside the sizing lower die 18.

[0053] In this embodiment, by providing the second electromagnetic heating ring 21, the second electromagnetic heating ring 21 can be operated by pressing the pressure contact switch 11 by the pressing plate 15 before the second pressing block 16 extrudes the preformed blank 22, so as to heat up and soften the preformed blank 22, and improve the extrusion forming efficiency.

[0054] The embodiments of this specific implementation manner are all preferred embodiments of the present utility model, and do not limit the protection scope of the present utility model accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A hot extrusion preforming tool for a wheel support shaft blank, characterized in that: It comprises a bottom die (1), the top of which is provided with an extrusion groove (5) for extruding a blank; A preforming lower die (2), which is arranged in the extrusion groove (5) and has a shaping groove (6) in the middle for preforming the blank by extrusion; A pressure cover (3) is arranged on the top of the bottom mold (1) and is used to press the preforming lower mold (2), and a through hole (7) is opened in the middle of the pressure cover (3) for avoiding the first pressure block (4); A first pressing block (4) is arranged on the top of the pressure cover (3), the bottom of the first pressing block (4) is raised to form a shallow punch portion (8), and the top is connected to an extrusion assembly (9); A first electromagnetic heating ring (10) is fixedly connected inside the preforming lower mold (2), and a pressure touch switch (11) for starting the first electromagnetic heating ring (10) is connected to the top of the pressure cover (3).

2. The hot extrusion preforming tooling for a wheel support shaft blank according to claim 1 is characterized in that: A positioning column (12) is fixedly connected to the inner bottom wall of the extrusion groove (5), a top protrusion of the positioning column (12) forms an extrusion portion (13), and a first positioning groove (14) for sleeve-mounting the positioning column (12) is provided at the bottom of the extrusion groove (5).

3. The hot extrusion preforming tooling for a wheel support shaft blank according to claim 2 is characterized in that: The extrusion assembly (9) comprises a support column (91), a top plate (92) and a hydraulic press (93); a plurality of support columns (91) are arranged in a circular array on the top of the pressure cover (3); the top of the support column (91) is fixedly connected to the top plate (92); the top of the top plate (92) is fixedly connected to the hydraulic press (93); the output shaft of the hydraulic press (93) passes through the top plate (92) and is detachably connected to the first pressure block (4).

4. The hot extrusion preforming tooling for a wheel support shaft blank according to claim 3 is characterized in that: A pressing plate (15) for pressing the pressure touch switch (11) is arranged on the top of the first pressing block (4); the pressing plate (15) is slidably connected to the supporting column (91); and the middle part of the pressing plate (15) is slidably connected to the output shaft of the hydraulic press (93) via a damper.

5. A hot extrusion molding tool for a wheel side support shaft blank, characterized in that: The hot extrusion preforming tooling of the wheel support shaft blank according to claim 4 further comprises a second pressing block (16), the top of which is detachably connected to the output shaft of the hydraulic press (93) and the bottom of which is convexly formed with a deep punching head (17); The lower shaping die (18) is placed in the extrusion groove (5) and has a shaping groove (19) in the middle thereof for extruding a preformed blank (22).

6. The hot extrusion molding tool for a wheel support shaft blank according to claim 5, characterized in that: A second positioning groove (20) for sleeve-mounting the positioning column (12) is provided at the bottom of the shaping lower mold (18), and the second positioning groove (20) is communicated with the shaping groove (19).

7. The hot extrusion molding tool for a wheel support shaft blank according to claim 5, characterized in that: A second electromagnetic heating ring (21) is fixedly connected inside the lower shaping die (18).

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