Hub die casting and production process thereof

Abstract

The invention relates to the technical field of hub machining, and discloses a hub die casting and a production process thereof, and the production process of the hub die casting comprises the following steps: roughly turning a feeding water gap position, and cutting off a water gap material generated during hub die casting; primary punching and forward punching are conducted, specifically, the hub is clamped through punching equipment, and a spoke ring at one end of the hub is punched; primary punching and reverse punching are conducted, specifically, the hub is clamped through punching equipment, a spoke ring at the other end of the hub is punched, and the placement direction of the hub is opposite to the placement direction of the hub during primary punching and forward punching; and tapping is conducted, specifically, a tapping machine is used for conducting tapping on the inner concave part of the hub. The precision of hub punching can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of hub processing, and in particular to a hub die-casting and a production process thereof. Background Art

[0002] Currently, after the flower hub is die-cast, it needs to be processed through turning, punching, tapping and other processes to form a finished flower hub.

[0003] Existing finished flower hubs such as Figure 1 As shown, it includes a hub shell and a spoke ring. The spoke ring is installed at both ends of the hub shell. A plurality of through holes are opened on the spoke ring, and the inner cavity at one end of the hub shell is recessed inward to form a plurality of concave portions with threaded holes.

[0004] Currently, when hubs are produced and processed, it is necessary to punch holes in the spoke rings at both ends of the hub shell. The parting line of the hub shell is often used as the positioning reference for the two clampings. However, since the hub shell is usually cylindrical, it is easy for the hub shell to be angularly offset during the clamping process, resulting in deviations in the relative positions of the through holes of the spoke rings at both ends of the hub shell. Summary of the Invention

[0005] In order to improve the punching accuracy of the hub, the present application provides a hub die-casting and a production process thereof.

[0006] In a first aspect, the present application provides a hub die-casting production process, which adopts the following technical solution: A hub die-casting production process comprises the following steps: Rough turning of the feed gate position to remove the gate material produced during hub die casting; One-shot punching is a forward punching method. The hub is clamped with a punching device and the spoke ring at one end of the hub is punched. In a reverse punching, the hub is clamped by the punching equipment and the spoke ring at the other end of the hub is punched. The hub is placed in the opposite direction compared to the forward punching. Tapping: Use a tapping machine to drill and tap the inner concave part of the hub; Among them, the clamping device of the punching equipment for clamping the flower hub includes a base, a first clamping seat, a second clamping seat and a positioning pin; the first clamping seat is arranged on the base, and the second clamping seat is rotatably connected to the base to approach or move away from the first clamping seat, and is used to clamp the flower hub together with the first clamping seat; the positioning pin is arranged on the base, and is used to insert the through hole formed by the forward punching of the flower hub during the reverse punching of the punching, so as to limit the flower hub.

[0007] By adopting the technical scheme, the placing directions of the hub are opposite in the one-time punching forward stamping and one-time punching reverse stamping steps, and the positioning pin is inserted into the punched through hole to limit the through hole, thereby effectively reducing the problem of position deviation of the through hole caused by clamping deviation. In addition, the first clamping seat and the second clamping seat in the clamping device work cooperatively to ensure the stability of the hub during punching, thereby further improving the machining precision and product consistency.

[0008] Optionally, after the one-time punching reverse stamping step, the method further comprises a secondary punching step of chamfering the through hole by stamping, and the chamfering is performed in two times, i.e., first, the spoke ring at one end of the hub is chamfered by stamping, and then the hub is inverted to chamfer the spoke ring at the other end of the hub by stamping.

[0009] By adopting the technical scheme, the punched through hole is chamfered to form a smoother appearance, reduce the harm caused by personnel touching, and be more conducive to the later assembly of the product.

[0010] Optionally, after the tapping step, the method further comprises a fine turning step of fine turning the hub.

[0011] Optionally, before the rough turning feeding water gap step, the method further comprises a pressing inner sleeve step of pressing the insert of the hub into the inner cavity of the hub by stamping.

[0012] Optionally, the base has a limiting seat protruding from the base, the limiting seat is provided with at least two limiting seats, and the limiting seats jointly enclose a limiting cavity for inserting one end of the hub; in the one-time punching forward stamping step, the hub cooperates with the limiting cavity.

[0013] By adopting the technical scheme, the limiting cavity enclosed by the limiting seat cooperates with one end of the hub to ensure the position stability of the hub during the one-time punching forward stamping, and improve the efficiency of the hub cooperating with the clamping device during the one-time punching forward stamping.

[0014] Optionally, the base movably has a movement blocking pin, when the first clamping seat and the second clamping seat cooperate to clamp the hub, the movement blocking pin can be moved to be inserted into the second clamping seat to limit the movement of the second clamping seat relative to the base.

[0015] By adopting the technical scheme, when the first clamping seat and the second clamping seat clamp the hub, the movement blocking pin is inserted into the second clamping seat, thereby effectively preventing accidental movement of the second clamping seat during stamping, and improving the stability of the stamping process.

[0016] Optionally, the first clamping seat is fixed to the base.

[0017] Optionally, the first clamping seat is rotationally connected to the base, and a synchronizing member is arranged between the first clamping seat and the second clamping seat, so that when the second clamping seat rotates, the first clamping seat is driven to rotate synchronously and mirror-imaged. The base comprises a main body and a sliding seat, the sliding seat is arranged on the main body for placing the flower hub and has opposite punching positions and loading and unloading positions; when the sliding seat is located at the punching position, the flower hub on the sliding seat can be clamped by the first clamping seat and the second clamping seat; when the sliding seat is located at the loading and unloading position, the sliding seat is located outside the active range of the first clamping seat and the second clamping seat. The sliding seat, the first clamping seat and / or the second clamping seat are provided with a linkage member, so that when the first clamping seat and the second clamping seat rotate in a direction away from each other, the sliding seat can be driven to move from the punching position to the loading and unloading position.

[0018] By adopting the above technical solution, the synchronous rotation of the first clamping seat and the second clamping seat is realized by the synchronizing member to realize mirror-imaged movement, thereby improving the visibility during clamping and the convenience of installing the flower hub. The punching position and the loading and unloading position of the sliding seat further optimize the operation process, so that the operator can perform loading and unloading operations on the flower hub at the loading and unloading position of the punching position, thereby improving the safety of the operation. The linkage member automatically drives the sliding seat to move when the clamping seat rotates, thereby reducing manual intervention and improving the degree of automation and safety of production.

[0019] Optionally, the first clamping seat and the second clamping seat are provided with a clearance hole for the punching head of the punching device to provide a sufficient working space for the punching head and avoid interference of the clamping device with the punching head during the punching process.

[0020] By adopting the above technical solution, the clearance hole provides a sufficient working space for the punching head, thereby avoiding interference of the clamping device with the punching head during the punching process.

[0021] In a second aspect, the application provides a production process for a flower hub die casting, which adopts the following technical solution: A flower hub die casting is made by using any one of the production processes for a flower hub die casting described above In summary, the application has at least one of the following beneficial effects: Through the cooperation of the step-by-step punching, the positioning pin limiting and the clamping device, the application can improve the consistency and accuracy of punching of the spoke rings at both ends of the flower hub, reduce the positional deviation of the punching, and improve the assembly accuracy and use performance of the product. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structural schematic view of a finished flower hub die casting; Figure 2 is a flowchart of the first embodiment of the application; Figure 3 is a structural schematic diagram of the clamping device in Embodiment One of the present application; Figure 4 is a top view of the clamping device in Embodiment One of the present application; Figure 5 is a structural schematic diagram of the cooperation between the hub and the clamping device in a one-time punching and forward stamping step in Embodiment One of the present application; Figure 6 is a three-dimensional structural schematic diagram of the clamping device in Embodiment One of the present application; Figure 7 is a structural schematic diagram of the clamping device in Embodiment Two of the present application; Figure 8 is a structural schematic diagram of the cooperation between the clamping device and the hub in Embodiment Two of the present application; Figure 9 is a structural schematic diagram of the second clamping seat in Embodiment Three of the present application; Figure 10 is a sectional view at A-A in Figure 9 .

[0023] Reference signs: 1, hub shell; 2, spoke circle; 3, through hole; 4, inner recess; 5, base; 51, main body; 52, sliding seat; 6, first clamping seat; 7, second clamping seat; 8, positioning pin; 81, support section; 82, plug-in section; 9, limiting seat; 10, limiting cavity; 11, blocking pin; 12, synchronization piece; 121, gear; 13, stamping position; 14, feeding and discharging position; 15, linkage piece; 151, connecting rope; 152, rope winding column; 16, accommodation hole; 17, clamping part; 18, mounting seat; 19, insertion slot; 20, handle; 21, waste box; 22, inlet. DETAILED DESCRIPTION

[0024] The following will be described in detail in combination with the accompanying drawings. Figures 1-10 The present application will be further described in detail.

[0025] Embodiment One: Please refer to Figure 2 , Figure 2 is a step flow schematic diagram of one embodiment of the hub press casting production process provided by the present application.

[0026] In one specific embodiment, the hub press casting production process comprises: Step One: press the inner bushing, press the insert of the hub into the inner cavity of the hub through stamping.

[0027] It should be noted that in this step, the nozzle material around the hub must first be knocked off with a wooden stick. The inner sleeve is then assembled with the hub and pressed into place using a hydraulic press, securing the inner sleeve to the hub's interior. After this step is completed, a tapered nozzle material extending along the hub's axis and with a pointed corner remains at one end of the hub.

[0028] Step 2: Roughly turn the feed gate position and remove the gate material produced during the hub die-casting.

[0029] It should be noted that in this step, the hub is placed in a CNC lathe and clamped by the fixture of the CNC lathe, and then the remaining sharp-angled nozzle material of the hub is turned.

[0030] Step 3: Punch forward once, use the punching equipment to clamp and position the hub, and punch the spoke ring 2 at one end of the hub to form a through hole 3.

[0031] Step 4: Punch in reverse, use the punching equipment to clamp and position the hub, and punch the spoke ring 2 at the other end of the hub to form a through hole 3, wherein the hub is placed in the opposite direction compared to the forward punching.

[0032] Step 5: Secondary punching: Use punching equipment to clamp and position the hub, and punch and chamfer the through hole 3 on the spoke ring 2 at one end of the hub.

[0033] Step 6: Secondary punching and reverse punching. Use punching equipment to clamp and position the hub, and punch and chamfer the through hole 3 on the spoke ring 2 at the other end of the hub. The hub is placed in the opposite direction compared to the first punching and forward punching.

[0034] It should be noted that the punching equipment in steps three to six are all hydraulic presses, and steps three and four share one hydraulic press, and steps five and six share another hydraulic press. The difference between the two hydraulic presses is that the shapes of the punching heads are different, and the clamping devices for clamping the hubs on the two hydraulic presses are the same.

[0035] Step 7: Tapping: Use a multi-axis drilling and tapping machine to drill and tap the inner concave portion 4 of the hub.

[0036] It should be noted that during this step, the base of the multi-axis tapping machine, which houses the hub, can be adjusted horizontally. This allows the hub to be drilled before the drilling station and then automatically moved to the tapping station for tapping, completing the process in one go to improve tapping efficiency. After tapping, the hub should be rinsed in warm water. Use an air gun to remove impurities from the hub surface and the tapping holes.

[0037] Step 8: Fine-turn the hub, including the outer surface and inner hole of the hub.

[0038] It should be noted that in this step, the hub is placed in the numerical control lathe, and the outer surface of the hub is first finished, then washed with warm water and dried, and then placed in the numerical control lathe to finish the inner hole of the hub. After completion, wash with warm water and dry.

[0039] Step nine: inspect the packaging, check the product surface pores, and use the go-no-go gauge to sample the threaded holes. The qualified products are packaged with bubble bags.

[0040] Referring to Figure 3 , Figure 4 and Figure 5 , further, the application also discloses a clamping device for clamping the hub in the punching equipment. The clamping device comprises a base 5, and a first clamping seat 6, a second clamping seat 7, a positioning pin 8 and a limiting seat 9 installed on the base 5.

[0041] Among them, the first clamping seat 6 and the second clamping seat 7 both have a clamping part 17 in the shape of a semicircle, and the arc openings of the clamping parts 17 of the first clamping seat 6 and the second clamping seat 7 are opposite. In this embodiment, the first clamping seat 6 is fixed on the upper surface of the base 5, and one end of the second clamping seat 7 is hinged to the upper surface of the base 5 through a pin shaft, and the hinge axis extends vertically, so that the second clamping seat 7 can rotate towards or away from the first clamping seat 6.

[0042] In use, first rotate the second clamping seat 7 away from the first clamping seat 6 to form an opening between one end of the first clamping seat 6 and one end of the second clamping seat 7 for the hub to enter between the first clamping seat 6 and the second clamping seat 7, then place the hub between the first clamping seat 6 and the second clamping seat 7, and make the outer peripheral wall of the hub shell 1 of the hub fit into the inner periphery of the clamping part 17 of the first clamping seat 6, so that the hub is coaxial with the first clamping seat 6. Then rotate the second clamping seat 7 towards the first clamping seat 6, when the end of the second clamping seat 7 away from the hinged end abuts against the first clamping seat 6, the clamping part 17 of the second clamping seat 7 also abuts against the outer peripheral wall of the hub shell 1, at this time the clamping part 17 of the first clamping seat 6 and the clamping part 17 of the second clamping seat 7 jointly clamp the hub, and the hub is located directly below the moving punching head of the punching equipment. The punching head (not shown in the figure) is cylindrical and has multiple punching heads according to the hole position, and the multiple punching heads are installed on the template driven by the air cylinder. When punching, the template moves downward to drive the punching head downward to punch the spoke ring 2.

[0043] In order to make room for the waste punched by the punching head, a relief hole 16 corresponding to the punching head is formed on the clamping part 17, in this embodiment, the relief hole 16 penetrates the clamping part 17 vertically, and the waste punched falls away from the clamping part 17 through the relief hole 16.

[0044] Referring to Figure 5 and Figure 6The limiting seat 9 and the positioning pin 8 are used for further limiting the position of the hub. Specifically, the limiting seat 9 is fixed on the upper surface of the base 5, and the limiting seat 9 has a plurality on the base 5. Each limiting seat 9 is in the shape of an arc piece, and the limiting seat 9 is coaxial with the clamping part 17 of the first clamping seat 6. In this embodiment, the limiting seat 9 has three, and the three limiting seats 9 jointly define a limiting cavity 10 for limiting one end of the hub.

[0045] The positioning pin 8 is in the shape of a column and is fixed on the base 5. The positioning pin 8 is provided in a plurality on the base 5, and the distribution direction of the positioning pin 8 is coaxial with the distribution direction of the limiting seat 9. The positioning pin 8 is used for inserting the through hole 3. Specifically, each positioning pin 8 includes a support section 81 and an insertion section 82 which are coaxially connected in sequence from bottom to top. The support section 81 and the insertion section 82 are both in the shape of a cylinder. The outer diameter of the support section 81 is larger than the hole diameter of the through hole 3, and the outer diameter of the insertion section 82 is consistent with the hole diameter of the through hole 3. In this embodiment, the positioning pin 8 has three. The upper surface of the support section 81 is flush with the upper surface of the limiting seat 9.

[0046] In the step of one-time punching forward stamping, the end of the hub matched with the limiting seat 9 is inserted into the limiting cavity 10 enclosed by the limiting seat 9. At the same time, the top of the insertion section 82 of the positioning pin 8 supports the spoke circle 2 at the bottom end of the hub, so that the hub quickly reaches the coaxial position with the clamping part 17 of the first clamping seat 6. The hub is not easy to move relative to the first clamping seat 6 in the movement of the second clamping seat 7 under the limitation of the limiting seat 9.

[0047] In the step of one-time punching reverse stamping, the hub is placed on the base 5 with the spoke circle 2 that has not been punched upward and the spoke circle 2 that has been punched downward. The insertion section 82 of each positioning pin 8 is inserted into a different through hole 3 of the spoke circle 2 that has been punched. The support section 81 supports the spoke circle 2 to quickly guide the hub to the position for punching, so that the hub is coaxial with the first clamping seat 6.

[0048] Further, in order to improve the stability of the first clamping seat 6 and the second clamping seat 7 when clamping the hub, the base 5 is fixed with a mounting seat 18. The mounting seat 18 is movably provided with a displacement blocking pin 11 in a straight line direction. The displacement blocking pin 11 can be slidably provided on the mounting seat 18, or can be threadedly provided on the mounting seat 18. The second clamping seat 7 is provided with a slot 19 for inserting the displacement blocking pin 11.

[0049] When the first clamping seat 6 and the second clamping seat 7 jointly clamp the hub, the slot 19 of the second clamping seat 7 is opposite to the displacement blocking pin 11. At this time, the displacement blocking pin 11 is moved to be inserted into the slot 19, which can prevent the second clamping seat 7 from rotating relative to the base 5, so that the second clamping seat 7 is positioned relative to the base 5. After the punching is completed, the displacement blocking pin 11 is moved out of the second clamping seat 7, so that the second clamping seat 7 can be rotated again.

[0050] In addition, in order to facilitate the rotation of the second clamping seat 7, the second clamping seat 7 is fixed with a handle 20 extending in a straight line.

[0051] Embodiment two: The difference between the embodiment and the embodiment one is that the first clamping seat 6 and the base 5 are arranged differently.

[0052] Specifically, referring to Figure 7 and Figure 8 In the embodiment, the first clamping seat 6 is also connected to the base 5 through a pin shaft hinge, the rotation axis of the first clamping seat 6 is parallel to the rotation axis of the second clamping seat 7, and the hinge end of the first clamping seat 6 is close to the hinge end of the second clamping seat 7.

[0053] The first clamping seat 6 and the second clamping seat 7 have a synchronization part 12. The synchronization part 12 includes two gears 121 fixed to the hinge ends of the first clamping seat 6 and the second clamping seat 7, respectively, and coaxial with the rotation axes of the first clamping seat 6 and the second clamping seat 7, respectively. The two gears 121 are meshed with each other, so that when one of the first clamping seat 6 and the second clamping seat 7 rotates, the other one rotates in a mirror image.

[0054] Therefore, when the hub is matched with the clamping device, the second clamping seat 7 is first rotated away from the first clamping seat 6, and the first clamping seat 6 is simultaneously rotated, so that the opening between the first clamping seat 6 and the second clamping seat 7 is increased, and the hub is matched with the limiting seat 9 and the positioning pin 8.

[0055] Moreover, in the embodiment, the base 5 includes a main body 51 and a sliding seat 52, the sliding seat 52 is in an inverted T shape in a longitudinal section and slides on the base 5 in a straight line, and the upper surface of the sliding seat 52 is flush with the upper surface of the base 5. The positioning pin 8, the limiting seat 9 and the mounting seat 18 are all fixed on the upper surface of the sliding seat 52, the first clamping seat 6 and the second clamping seat 7 are both hinged on the main body 51, and the first clamping seat 6 and the second clamping seat 7 are mirror-symmetrically rotated along the sliding direction of the sliding seat 52.

[0056] The sliding seat 52 has a punching position 13 and an up-down position 14 when it slides on the subject. Specifically, when the sliding seat 52 is located at the punching position 13, the first clamping seat 6 and the second clamping seat 7 can be rotated to coaxially clamp the hub. When the sliding seat 52 is located at the up-down position 14, the sliding seat 52 moves away from the first clamping seat 6 and the second clamping seat 7, and the positioning pin 8 and the limiting seat 9 for limiting the hub are away from the position opposite to the punching head of the punching equipment. The operator loads and unloads the hub at the up-down position 14 to improve the safety of the operation.

[0057] In order to drive the sliding seat 52 to move, in this embodiment, a linkage member 15 is provided between the sliding seat 52 and both the first clamping seat 6 and the second clamping seat 7. In other embodiments, the sliding seat 52 may have the linkage member 15 only between the first clamping seat 6 or only between the sliding seat 52 and the second clamping seat 7. When the first clamping seat 6 and the second clamping seat 7 move away from each other, the linkage member 15 drives the sliding seat 52 to move from the punching position 13 to the loading and unloading position 14.

[0058] Taking the linkage 15 between the sliding seat 52 and the second clamping seat 7 as an example, the linkage 15 includes a connecting rope 151 and a rope winding post 152. The rope winding post 152 is fixed to the main body 51, and the upper and lower material positions 14 of the sliding seat 52 are located between the punching position 13 and the rope winding post 152. One end of the connecting rope 151 is fixed to the mounting seat 18, and the other end of the connecting rope 151 is fixed to the second clamping seat 7. The connecting rope 151 is then passed around the rope winding post 152.

[0059] When the sliding seat 52 is located at the punching position 13 and the first clamping seat 6 and the second clamping seat 7 jointly clamp the hub, the connecting rope 151 is in a relaxed state. When the first clamping seat 6 and the second clamping seat 7 rotate away from each other until the opening between them is large enough for the positioning pin 8 and the limit seat 9 to move out, the connecting rope 151 is in a stretched state. The first clamping seat 6 and the second clamping seat 7 continue to move away from each other, pulling the connecting rope 151 together, causing the connecting rope 151 to pull the sliding seat 52 toward the upper and lower material positions 14 until the sliding seat 52 reaches the upper and lower material positions 14.

[0060] On the contrary, when it is necessary to move the sliding seat 52 back to the punching position 13, the first clamping seat 6 and the second clamping seat 7 can be rotated toward each other until the opening can allow the positioning pin 8 and the limit seat 9 to pass through, and then the sliding seat 52 can be pushed back to the punching position 13, and then the first clamping seat 6 and the second clamping seat 7 can be rotated toward each other until they abut against each other and jointly clamp the flower hub, and then the blocking pin 11 can be inserted into the second clamping seat 7.

[0061] Example 3: The embodiment of the present application differs from the above-mentioned embodiment 1 and embodiment 2 in that the ways of setting the clearance holes 16 on the first clamping seat 6 and the second clamping seat 7 are different.

[0062] Reference Figure 9 and Figure 10Specifically, the first clamp seat 6 and the second clamp seat 7 are provided with the relief holes 16 in the same way. Taking the second clamp seat 7 as an example, in the embodiment, the relief hole 16 is communicated from the upper surface of the clamping portion 17 to the outer circumferential side of the clamping portion 17, and the relief hole 16 is inclined downward along the upper surface of the clamping portion 17 towards the outer circumferential side. The outer circumferential side of the second clamp seat 7 is detachably provided with a waste box 21 through a bolt, and the waste box 21 is provided with an inlet 22 communicated with the relief hole 16. Similarly, the first clamp seat 6 is also detachably provided with the waste box 21.

[0063] The waste material punched during punching can fall into the waste box 21 through the relief hole 16 and the inlet 22 to be collected, and the operator can take down the waste box 21 to clean it regularly, so that the convenience of collecting the waste material can be improved.

[0064] Embodiment four: The embodiment of the application discloses a hub pressure casting, which is obtained by the production process of the embodiment one or the embodiment two or the embodiment three.

[0065] The above are preferred embodiments of the application, and are not intended to limit the protection scope of the application. Therefore, equivalent changes made on the basis of the structure, shape and principle of the application should be covered within the protection scope of the application.

Claims

1. A hub die casting production process, characterized in that: The following steps are involved: Rough turning of the feed gate position to remove the gate material produced during hub die casting; A punching device is used to clamp the hub and punch the spoke ring (2) at one end of the hub; A punching device is used to clamp the hub and punch the spoke ring (2) at the other end of the hub, wherein the hub is placed in the opposite direction to the one-time punching device; Tapping: using a tapping machine to drill and tap the inner concave portion (4) of the hub; The punching equipment is used for clamping the flower hub, and the clamping device comprises a base (5), a first clamping seat (6), a second clamping seat (7) and a positioning pin (8); the first clamping seat (6) is arranged on the base (5), and the second clamping seat (7) is rotatably connected to the base (5) to approach or move away from the first clamping seat (6), and is used to clamp the flower hub together with the first clamping seat (6); the positioning pin (8) is arranged on the base (5), and is used to insert the through hole (3) formed by the forward punching of the flower hub during the reverse punching of the punching, so as to limit the flower hub.

2. A hub die casting production process according to claim 1, characterized in that: After the first punching and reverse punching step, the method further includes: a second punching step, wherein the through hole (3) is chamfered by punching, and the chamfering step is performed twice, firstly the spoke ring (2) at one end of the hub is punched and chamfered, and then the hub is inverted and the spoke ring (2) at the other end of the hub is punched and chamfered.

3. A hub die casting production process according to claim 1, characterized in that: The tapping step also includes: fine turning of the hub, and fine turning of the outer surface and inner hole of the hub.

4. A hub die casting production process according to claim 1, characterized in that: Before the step of rough turning the feed water inlet position, the step also includes: pressing the inner liner, and pressing the insert of the hub into the inner cavity of the hub by stamping.

5. The hub die-casting production process according to claim 1, characterized in that: The base (5) is provided with a limiting seat (9) protruding from the base (5), and at least two limiting seats (9) are provided, and the limiting seats (9) together enclose a limiting cavity (10) for inserting one end of the flower hub; in a single punching forward punching step, the flower hub cooperates with the limiting cavity (10).

6. The hub die-casting production process according to claim 1, characterized in that: A movable blocking pin (11) is provided on the base (5); when the first clamping seat (6) and the second clamping seat (7) cooperate to clamp the flower hub, the blocking pin (11) can be moved to be inserted into the second clamping seat (7) to limit the movement of the second clamping seat (7) relative to the base (5).

7. The hub die-casting production process according to claim 6, characterized in that: The first clamping seat (6) is fixed on the base (5).

8. The hub die-casting production process according to claim 6, characterized in that: The first clamping seat (6) is rotatably connected to the base (5), and a synchronization member (12) is provided between the first clamping seat (6) and the second clamping seat (7), and the synchronization member (12) drives the first clamping seat (6) to rotate synchronously in a mirror image when the second clamping seat (7) rotates; The base (5) includes a main body (51) and a sliding seat (52); the sliding seat (52) slides on the main body (51) for placing the flower hub, and has a relative punching position (13) and an upper and lower material position (14); when the sliding seat (52) is located at the punching position (13), the flower hub on the sliding seat (52) can be clamped by the first clamping seat (6) and the second clamping seat (7); when the sliding seat (52) is located at the upper and lower material position (14), the sliding seat (52) is located outside the movable range of the first clamping seat (6) and the second clamping seat (7); A linkage member (15) is provided between the sliding seat (52) and the first clamping seat (6) and / or the second clamping seat (7), so that when the first clamping seat (6) and the second clamping seat (7) rotate away from each other, the sliding seat (52) can be driven to move from the punching position (13) to the upper and lower material positions (14).

9. The hub die-casting production process according to claim 1, characterized in that: The first clamping seat (6) and the second clamping seat (7) are provided with a clearance hole (16) for making way for a punching head of a punching device for punching holes.

10. A hub die casting, characterized in that: The hub is manufactured using the hub die-casting production process described in any one of claims 1 to 9.

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