Trimming and punching composite die and press machine for hub inner supporting body forge piece

Abstract

The utility model relates to an edge cutting and punching composite die and a press machine for a hub inner supporting body forge piece. The composite die comprises an upper die base, a punch fixedly connected to the upper die base, a die core of which the inner cavity modeling is consistent with the modeling of a hub inner supporting body forge piece blank, and a lower die base rigidly connected with the die core, a trimming and shearing cutting edge used for removing forging burrs is formed between the outer side of the die core and the outer side of the upper die base cavity through a preset gap, and a hole used in cooperation with a punch is formed in the die core. In the production process of the hub inner supporting body forge piece, burrs generated during forging can be efficiently removed, a blank can be punched, and the milling time is shortened, the production cost is reduced, and the heat treatment performance is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of production of wheel hub inner support body forgings, in particular to a composite die and a press for trimming and punching the wheel hub inner support body forgings. Background Art

[0002] The wheel hub inner support body forging blank is typically forged using open die forging, which produces burrs. Previously, there were two methods for removing burrs: one was to mill them out during machining using a milling cutter. This method not only affects machining efficiency but also limits machining positioning due to the irregular shape of the burrs. Another common method is manual deburring, where the burrs are removed manually using tools such as angle grinders after the blank is forged off the production line. This method is inefficient and unsuitable for mass production.

[0003] In addition, the finished forgings of the inner support body of the wheel hub are generally provided with lightening holes, which are usually completely closed in the blank stage. That is, a lot of metal needs to be removed during the subsequent milling of the lightening holes. This method not only reduces the machining efficiency, but also reduces the effectiveness of quenching to a certain extent because the position of the lightening holes in the blank is completely closed, which is not conducive to improving the heat treatment performance of the product. Utility Model Content

[0004] In order to solve the above problems, the purpose of the present invention is to provide a composite die for trimming and punching the inner support body forging of the hub, which can not only quickly cut off the burrs, but also punch the weight-reducing holes of the blank.

[0005] According to one aspect of the present invention, a composite die for trimming and punching of a hub inner support forging is provided, comprising: an upper die base, a punch fixedly connected to the upper die base, a die core whose inner cavity shape is consistent with the shape of a hub inner support forging blank, a lower die base rigidly connected to the die core, a predetermined gap between the outer side of the die core and the outer side of the upper die base cavity forming a trimming shearing edge for removing forging burrs, and a hole provided on the die core for use with the punch.

[0006] Preferably, the trimming and punching composite die of the hub inner support forging also includes a material stripping device that is connected to each other and can move relative to the lower die base in the vertical direction. The material stripping device includes: a push plate, a top block for pushing the push plate upward, a guide sleeve, a rib plate, and a punching plate. The guide sleeve and the fixed support column are clearance-fitted for guiding the material stripping device when it moves up and down, wherein the two ends of the support column are rigidly connected to the lower die base and the die core respectively, and the upper and lower sides of the rib plate are rigidly connected to the punching plate and the push plate respectively.

[0007] Preferably, a spring unloading device is installed on the upper die base, and the spring unloading device includes: a cotter pin, a push rod configured as a stepped cylinder with a pin hole at the upper end for installing the cotter pin, and a spring arranged around the push rod.

[0008] Preferably, the upper die base and the lower die base are installed in the positioning grooves of the upper large plate and the lower large plate respectively.

[0009] Preferably, the trimming and punching composite die for the hub inner support forging further comprises a support column, both ends of which are provided with threaded holes, which are rigidly connected to the lower die base and the die core respectively by bolts.

[0010] According to another aspect of the present invention, a press is provided for operating the above-mentioned composite die for trimming and punching the inner support forging of the hub, the press comprising: a slider for driving the upper half of the die upward and downward, and a corresponding lower ejection device of the press acting on the ejector block.

[0011] Preferably, the press is further provided with a robot having a robot gripper for picking up and placing the wheel hub inner support body forging blank relative to the die core.

[0012] A composite die for trimming and punching of a hub inner support forging, comprising an upper plate and a lower plate, wherein the lower plate is provided with a positioning groove, in which a lower die seat is mounted, and a material ejection device and a support column are mounted on the lower die seat, wherein the material ejection device comprises a ejector block, a push plate, a guide sleeve, a rib plate, and a punching plate, and a die core is mounted on the support column; a second positioning groove is provided on the upper plate, in which an upper die seat is mounted, and a punch and an upper ejection device are mounted on the upper die seat, and the upper ejection device comprises a cotter pin, a spring, and a ejector rod.

[0013] The beneficial effect of the utility model is that it can efficiently complete the removal of burrs of the support body forging inside the wheel hub, is suitable for mass production, and can simultaneously complete the punching of the support body forging, which has a significant improvement in improving its heat treatment performance and shortening the milling processing time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 It is a front view showing the upper half of the mold of the present invention in a lifted state.

[0016] Figure 2 This is a front view showing the trimming and punching state after the upper half of the die has been lowered.

[0017] Figure 3 It is a front view showing the material return state after the upper half of the mold moves upward. DETAILED DESCRIPTION

[0018] The following detailed description of exemplary embodiments of the present invention is provided in conjunction with the accompanying drawings. The exemplary embodiments described below and illustrated in the accompanying drawings are intended to teach the principles of the present invention and enable those skilled in the art to implement and use the present invention in a variety of environments and for a variety of applications. Therefore, the scope of protection of the present invention is defined by the appended claims, and the exemplary embodiments are not intended to, and should not be considered to, limit the scope of protection of the present invention. Furthermore, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not necessarily drawn to actual proportions. Any reference to orientations or positions, such as top, bottom, left, right, top, and bottom, is based on the orientations or positions shown in the accompanying drawings and is intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation, and are therefore not to be construed as limiting the present invention. Throughout the accompanying drawings, identical elements are represented by identical or similar reference numerals. Conventional structures or partial structures may be omitted where they may cause confusion or difficulty in understanding the present disclosure.

[0019] Please refer to the following Figure 1 The composite die for trimming and punching of the inner support body forging of the wheel hub of the utility model is described in combination with the embodiment, including: a top block 1, a lower large plate 2, a lower die base 3, a push plate 4, a guide sleeve 5, a support column 6, a rib plate 7, a punching plate 8, a mold core 9, an upper large plate 10, an upper die base 11, a blank of the inner support body forging of the wheel hub 12, a cotter pin 13, a push rod 14, a spring 15, and a punch 16.

[0020] Among them, a positioning groove is provided on the upper large plate 10, and the upper die base 11 is installed in this positioning groove and is rigidly connected to the upper large plate 10 by bolts; the punch 16 is fixed to the upper die base 11 by bolts; the push rod 14 is a stepped cylinder, which is arranged on the upper die base 11, and a spring 15 is arranged around the outer side of a section with a small diameter of the push rod 14. A pin hole is provided at the upper end of the push rod 14 for installing a cotter pin 13.

[0021] The lower plate 2 is provided with a positioning groove, into which the lower die holder 3 is mounted and rigidly connected to the lower plate 2 via bolts. The support column 6 has threaded holes at both ends, rigidly connected to the lower die holder 3 and the die core 9 via bolts. The internal cavity of the die core 9 matches the shape of the support forging blank 13 within the wheel hub, ensuring accurate positioning during trimming and punching. A predetermined gap is provided between the outer side of the die core 9 and the outer side of the cavity of the upper die holder 11, both of which serve as cutting edges for trimming. The die core 9 is provided with a hole for use with the punch 16.

[0022] The stripping device consists of a top block 1, a push plate 4, a guide sleeve 5, a rib plate 7, and a punch plate 8. Each component is rigidly connected. The rib plate 7 has threaded holes on both its upper and lower sides, which are rigidly connected to the punch plate 8 and push plate 4 with bolts. The rib plate 7 serves as a support for the punch plate 8. The sheared burrs ultimately land on the punch plate 8. The entire stripping device is movable vertically relative to the lower die base 3. The guide sleeve 5 in the stripping device has a clearance fit with the fixed support column 6, which serves as a guide during its vertical movement.

[0023] When using the mold designed by the utility model, the first step is to Figure 1 As shown, the press slide drives the upper part of the mold, namely the upper plate 10, the upper die seat 11, the cotter pin 13, the ejector pin 14, the spring 15 and the punch 16, to move upward to the highest point. The mold is in an open state. At this time, the spring 15 arranged around the ejector pin 14 is in a natural state. Subsequently, the robot gripper (not shown in the figure) places the wheel hub inner support body forging blank 12 in the cavity of the die core 9. At this time, the wheel hub inner support body forging blank 12 is partially positioned, that is, it can only move upward. In the second step, the press slide drives the upper part of the mold downward. As the downward process proceeds, the punch 16 passes through the wheel hub inner support body forging blank 12 and falls into the hole on the die core 9, thus completing the punching. At the same time, the burr is sheared off the wheel hub inner support body forging blank 12 under the combined shear force of the outer side of the upper die seat 11 cavity and the outer side of the die core 9, until it descends to the bottom dead center of the press slide. Figure 2 As shown, at this time, the lower end face of the push rod 14 contacts the wheel hub inner support body forging blank 12, and the spring 15 is in a compressed state. In the third step, the press slider drives the upper half of the mold upward. At this time, the push rod 14 pushes the wheel hub inner support body forging blank 12 under the reaction force of the spring to prevent the blank from sticking to the punch 16. Then, the wheel hub inner support body forging blank 12 falls into the mold cavity of the mold core 9 under the action of gravity. After the press slider moves upward to the highest point and stops, the robot gripper takes away the wheel hub inner support body forging blank 12. Then, the lower ejection device of the press (not shown in the figure) acts on the ejector block 1 to push the material removal device of this utility model upward until the upper end face of the punching plate 8 is higher than the upper end face of the mold core 9, as shown specifically. Figure 3 At this point, the burrs sheared from the forging blank are higher than the upper end face of the die core. The press's side ejector (not shown) pushes the burrs horizontally away from the die. The press's lower ejector mechanism then returns, and gravity also forces the die's return mechanism back. This completes the deburring and punching process for the hub's inner support body forging blank.

[0024] According to the composite die for trimming and punching of the inner support body forging of the wheel hub of this embodiment, after the support body forging is positioned with the help of the die, the burrs generated during forging can be efficiently removed when the press is lowered once, and the punching of the blank can also be completed at the same time. The blank of the inner support body forging of the wheel hub can be stably placed on the die core 9, and its upper die base 11 and die core 9 can be used as shearing edges for removing forging burrs. The punch 16 is fixedly connected to the upper die base 11, and the burrs can be removed while punching can be completed.

[0025] The shape of the inner cavity of the mold core 9 is substantially consistent with the shape of the inner support body forging blank 12 of the wheel hub, which can ensure smooth placement of the blank into the mold core and accurate positioning.

[0026] The punch 16 is rigidly connected and fixed on the upper die base 11 . When working, the punch 16 and the hole provided on the die core 9 jointly complete the punching process of the blank.

[0027] Among them, a spring unloading device is installed on the upper die base 11, namely a cotter pin 13, a push rod 14, and a spring 15, which uses elastic force to prevent the wheel hub inner support forging blank 12 and the punch 16 from sticking.

[0028] Among them, the lower part of the mold is provided with a material return device. After the burrs of the blank are cut off, the material return device can push the burrs up to a height higher than the mold core 9, making it convenient for the side cylinder of the press or other equipment to remove the burrs.

[0029] In the description of this application, the meaning of "multiple" is two or more than three, unless otherwise clearly defined. Unless otherwise clearly defined and defined, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. Although the present invention has been described with reference to various specific embodiments, it should be understood that variations can be made within the spirit and scope of the concept of the described utility model. Therefore, it is intended that the present invention is not limited to the described embodiments, but will have the full scope defined by the language of the appended claims.

Claims

1. A composite die for trimming and punching of a hub inner support forging, characterized in that: include: An upper die seat (11), a punch (16) fixedly connected to the upper die seat (11), a die core (9) having an inner cavity shape consistent with the shape of a hub inner support body forging blank (12), a lower die seat (3) rigidly connected to the die core (9), a trimming shearing edge for removing forging burrs formed by a predetermined gap between the outer side of the die core (9) and the outer side of the cavity of the upper die seat (11), and a hole for use with the punch (16) on the die core (9).

2. The composite die for trimming and punching of the inner support forging of the wheel hub according to claim 1, characterized in that: The invention also comprises a material ejection device which is connected to each other and can move relative to the lower die base (3) in a vertical direction. The material ejection device comprises: a material ejection plate (4), a top block (1) for pushing the material ejection plate (4) upward, a guide sleeve (5), a rib plate (7), and a material punching plate (8). A clearance fit is formed between the guide sleeve (5) and a fixed support column (6) for guiding the material ejection device when the material ejection device moves up and down. The two ends of the support column (6) are respectively rigidly connected to the lower die base (3) and the die core (9), and the upper and lower sides of the rib plate (7) are respectively rigidly connected to the material punching plate (8) and the material ejection plate (4).

3. The trimming and punching composite die for the wheel hub inner support forging according to claim 1, characterized in that: A spring unloading device is installed on the upper die seat (11), and the spring unloading device comprises: a cotter pin (13), a push rod (14) which is configured as a stepped cylinder and has a pin hole at the upper end for installing the cotter pin (13), and a spring (15) arranged around the push rod (14).

4. The trimming and punching composite die for the wheel hub inner support forging according to claim 1, characterized in that: The upper die base (11) and the lower die base (3) are respectively installed in the positioning grooves of the upper large plate (10) and the lower large plate (2).

5. The trimming and punching composite die for the wheel hub inner support forging according to claim 1, characterized in that: It also comprises a support column (6), wherein threaded holes are provided at both ends of the support column (6) and are respectively rigidly connected to the lower die base (3) and the die core (9) via bolts.

6. A press machine, characterized in that: A press machine for operating a composite die for trimming and punching a hub inner support forging as claimed in any one of claims 2 to 5, the press machine comprising: a slider for driving the upper half of the die upward and downward, and a corresponding ejector device at the bottom of the press machine acting on the ejector block (1).

7. The press according to claim 6, characterized in that A robot is also provided, which has a robot gripper for picking up and placing the wheel hub inner support body forging blank relative to the mold core (9).

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