Bidirectional forging head upsetting tool

Abstract

The tool comprises an outer die sleeve, a conical inner die body is movably placed in the outer die sleeve, the inner die body is composed of two symmetrically-spliced inverted-cone-shaped half die cores, the two half die cores are both movably attached to an inverted-cone-shaped groove in the outer die sleeve, a die cavity is formed between the two half die cores, and the outer die sleeve is provided with an inverted-cone-shaped groove. An upper port and a lower port of the die cavity are exposed out of the upper end and the lower end of the outer die sleeve respectively, the upper side and the lower side in the die cavity are each provided with a pier head groove, an upper ejector rod is inserted into the upper port of the die cavity, and a lower ejector rod is inserted into the lower port of the die cavity. By arranging the outer die sleeve, the two half die cores, the upper ejector rod and the lower ejector rod to form a special half die structure, double-end upsetting of a forge piece can be achieved within one heating number only through one-way pressure in the forging process, and the problem that existing double-end upsetting rough machining needs to depend on horizontal forging equipment is solved; most existing vertical forging equipment can meet the requirements, and the application range is wider.

Description

Technical Field

[0001] The present invention relates to the technical field of forging upsetting processing, and in particular to a forging two-way upsetting tooling. Background Technique

[0002] Forging upsetting processing is an important metal forming process, mainly used for manufacturing forgings with an upset head structure. It uses a mold to locally upset a heated metal blank to form the required upset head shape.

[0003] At present, the single-way upsetting of forgings can generally be achieved by simple tooling such as a material tray and forged by a vertical forging equipment. However, if one wants to achieve two-way upsetting in one heat, special equipment such as horizontal forging is often required, but the application scope of such equipment is relatively narrow and is not common in most forging factories.

[0004] Therefore, we propose a forging two-way upsetting tooling to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a forging two-way upsetting tooling to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: A forging two-way upsetting tooling includes an outer mold sleeve. A conical inner mold body is movably placed in the outer mold sleeve. The inner mold body is composed of two symmetrically assembled inverted conical half mold cores, and both half mold cores are movably close to the inverted conical groove in the outer mold sleeve. A mold cavity is formed between the two half mold cores. The upper port and the lower port of the mold cavity respectively expose from the upper and lower ends of the outer mold sleeve. Upsetting grooves are respectively arranged on the upper and lower sides in the mold cavity. An upper ejector rod is inserted into the upper port of the mold cavity, and a lower ejector rod is inserted into the lower port of the mold cavity. After the upper ejector rod is pressed downward into the inner mold body, the lower ejector rod is then pressed upward into the inner mold body to realize double-headed upsetting of the forging.

[0007] In a further embodiment, the upper and lower end faces of the outer mold sleeve and the inner mold body are flush with each other.

[0008] In a further embodiment, the pressing plate size of the upper ejector rod is larger than the upper end opening size of the half mold core, and the pressing plate size of the lower ejector rod is larger than the lower end opening size of the half mold core.

[0009] In a further embodiment, mechanical clamping jaws are provided outside the outer die sleeve. The mechanical clamping jaws include a pair of clamping rods and a pair of cushion blocks. The clamping rods are clamped on both sides outside the outer die sleeve, and a ball screw module is installed at the rear ends of the pair of clamping rods. The cushion blocks are placed under the outer die sleeve, and a push rod is connected to the rear end of the cushion block. A connecting rod is hinged between the push rod and the clamping rod through a hinge shaft. A bracket is slidably connected under the push rod, and a first telescopic member is installed under the bracket. The first telescopic member is supported and fixed through a mounting frame, and a second telescopic member for driving the push rod to move horizontally is also installed at the rear side of the mounting frame. A support plate is installed under the second telescopic member, and the support plate is slidably connected to the mounting frame vertically.

[0010] In a further embodiment, the upper edge of the cushion block protrudes beyond the upper edge of the push rod.

[0011] In a further embodiment, a through groove is also formed on the mounting frame, and the output shaft of the second telescopic member penetrates through the inside of the through groove.

[0012] In a further embodiment, a sliding groove is formed in the push rod, and the hinge shaft for connecting the push rod and the connecting rod slidably penetrates through the inside of the sliding groove.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: By providing an outer die sleeve, two half die cores, an upper ejector rod, and a lower ejector rod, the present invention forms a special split die structure, enabling the double-end upsetting of forgings to be achieved in one heat treatment with only unidirectional pressure during the forging process, solving the problem that the current double-end upsetting processing relies on horizontal forging equipment, and enabling most existing vertical forging equipment to meet the requirements, with a wider application range. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic structural diagram of the outer die sleeve and the half die core of the present invention after being half-sectioned; Figure 3 is a schematic structural diagram of the present invention in the state where the upper ejector rod is pressed in; Figure 4 is a schematic structural diagram of the present invention in the state where the lower ejector rod is pressed in; Figure 5 is a schematic structural diagram of the present invention in the state of the forging-complete and flipped die.

[0015] In the figure: 1. Outer die sleeve; 2. Half die core; 21. Upset head groove; 3. Upper ejector rod; 4. Lower ejector rod; 5. Clamping rod; 6. Cushion block; 7. Push rod; 8. Connecting rod; 9. Hinge shaft; 10. Ball screw module; 11. Bracket; 12. First telescopic member; 13. Mounting frame; 14. Support plate; 15. Second telescopic member. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0017] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0019] Please refer to Figure 1-2 , a two-way upsetting tooling for forgings, including an outer mold sleeve 1. A vertically penetrating inverted conical groove is formed inside the outer mold sleeve 1. A conical inner mold body is movably placed in the inverted conical groove. The inner mold body is composed of two symmetrically joined inverted conical half mold cores 2. And both of the two half mold cores 2 are movably and closely attached to the inverted conical groove inside the outer mold sleeve 1. A mold cavity is formed between the two half mold cores 2. The upper port and the lower port of the mold cavity respectively expose from the upper and lower ends of the outer mold sleeve 1. A upsetting groove 21 is respectively arranged on the upper and lower sides inside the mold cavity. The upper port of the mold cavity is inserted with an upper ejector rod 3, and the lower port of the mold cavity is inserted with a lower ejector rod 4. During forging, first, a cushion body is arranged under the outer mold sleeve 1. The vertical forging machine first punches the upper ejector rod 3, so that when the upper ejector rod 3 is pressed into the inner mold body, the lower ejector rod 4 will not be pressed into the inner mold body. Then, the cushion body arranged under the outer mold sleeve 1 is removed, and the upper ejector rod 3 is continuously punched. The bottom of the lower ejector rod 4 is reversely stressed, that is, it is pressed upward into the inner mold body to realize the two-way upsetting processing of the forging.

[0020] Specifically, the upper and lower end faces of the outer mold sleeve 1 and the inner mold body are flush with each other. At the same time, the size of the pressing plate of the upper ejector rod 3 is larger than the upper opening size of the half mold core 2, and the size of the pressing plate of the lower ejector rod 4 is larger than the lower opening size of the half mold core 2, which facilitates the pressing plates to closely adhere to the upper and lower end faces of the inner mold body after the upper ejector rod 3 and the lower ejector rod 4 are pressed in.

[0021] Please refer to Figures 3-5 , for the convenience of forging processing on a quick forging machine, a mechanical gripper is provided outside the outer mold sleeve 1. The mechanical gripper includes a pair of clamping rods 5 and a pair of cushion blocks 6. The clamping rods 5 are used to clamp on both sides outside the outer mold sleeve 1, and a ball screw module 10 is installed at the rear end of the pair of clamping rods 5. Specifically, the ball screw module 10 includes a screw rod and a pair of ball nuts. The two clamping rods 5 are respectively fixed to the ball nuts, and the screw rod is a double-headed screw rod with two opposite and symmetric thread directions. The end of the screw rod is also connected to a driving motor, so that when the screw rod rotates, the ball nuts drive the two clamping rods 5 to approach or separate, realizing the clamping or loosening of the outer mold sleeve 1. When clamping, the outer mold sleeve 1 is limited, which is convenient for forging. The cushion block 6 is used to pad under the outer mold sleeve 1 to play the role of a cushion body, and a push rod 7 is connected to the rear end of the cushion block 6. A connecting rod 8 is hinged between the push rod 7 and the clamping rod 5 through a hinge shaft 9. A sliding connection is provided between the push rod 7 and a bracket 11 below, and a first telescopic member 12 is installed below the bracket 11. The first telescopic member 12 is supported and fixed by a mounting frame 13, and a second telescopic member 15 for driving the push rod 7 to move horizontally is also installed at the rear side of the mounting frame 13. A support plate 14 is installed below the second telescopic member 15, and the support plate 14 is vertically slidably connected to the mounting frame 13 so that when the push rod 7 follows the first telescopic member 12 to lift and lower, the support plate 14 can lift and slide synchronously. At the same time, when the push rod 7 follows the second telescopic member 15 to move horizontally, it will slide inside the second telescopic member 15.

[0022] Specifically, when in use, the telescopic member can be, but not limited to, a cylinder or a hydraulic cylinder. During the initial forging, the cushion block 6 pads under the outer mold sleeve 1 (as Figure 3 shown). After the upper ejector rod 3 is pressed into the inner mold body, the second telescopic member 15 is controlled to retract, so as to pull the cushion block 6 out from under the outer mold sleeve 1 through the push rod 7. At the same time, the first telescopic member 12 extends, driving the push rod 7 and the cushion block 6 to rise, without affecting the pressing operation of the lower ejector rod 4 (as Figure 4 shown). Finally, when it is necessary to tilt the outer mold sleeve 1, the cushion block 6 is controlled to move to hook the corner of the outer mold sleeve 1 (as Figure 5 shown).

[0023] Specifically, the upper edge of the cushion block 6 protrudes from the upper edge of the push rod 7, so that an included angle is formed between the cushion block 6 and the push rod 7, which is convenient for hooking the bottom corner of the outer mold sleeve 1 when tilting the outer mold sleeve 1.

[0024] A through groove is also provided on the mounting frame 13, and the output shaft of the second telescopic member 15 penetrates through the inside of the through groove, facilitating the up and down movement of the outer mold sleeve 1.

[0025] A chute is provided inside the push rod 7, and the hinge shaft 9 for connecting the push rod 7 and the connecting rod 8 slidably penetrates through the inside of the chute, so that when the clamping rod 5 clamps or loosens, the hinge shaft 9 can telescopically slide in the chute along the clamping or loosening direction of the clamping rod 5.

[0026] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0027] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A forging bidirectional pier head tooling, comprising an outer die sleeve (1), characterized in that: A conical inner mold body is movably placed in the outer mold sleeve (1), and the inner mold body is composed of two symmetrically assembled inverted conical half mold cores (2), and the two half mold cores (2) are both movably attached to the inverted conical groove in the outer mold sleeve (1), and a mold cavity is formed between the two half mold cores (2). The upper port and the lower port of the mold cavity are exposed from the upper and lower ends of the outer mold sleeve (1) respectively, and a pier head groove (21) is provided on the upper and lower sides of the mold cavity respectively. The upper port of the mold cavity is plugged with an upper ejector rod (3), and the lower port of the mold cavity is plugged with a lower ejector rod (4). After the upper ejector rod (3) is pressed downward into the inner mold body, the lower ejector rod (4) is then pressed upward into the inner mold body, so as to achieve double-headed roughening of the forging.

2. A forging bidirectional pier head tooling according to claim 1, characterized in that: The upper and lower end surfaces of the outer mold sleeve (1) and the inner mold body are flush with each other.

3. A forging bidirectional pier head tooling according to claim 1, characterized in that: The size of the pressure plate of the upper ejector rod (3) is larger than the size of the upper opening of the half mold core (2), and the size of the pressure plate of the lower ejector rod (4) is larger than the size of the lower opening of the half mold core (2).

4. A forging bidirectional pier head tooling according to claim 1, characterized in that: The outer mold sleeve (1) is provided with a mechanical clamp outside, and the mechanical clamp includes a pair of clamping rods (5) and a pair of cushion blocks (6). The clamping rods (5) are clamped on both sides of the outer mold sleeve (1), and a ball screw module (10) is installed at the rear end of the pair of clamping rods (5). The cushion block (6) is cushioned under the outer mold sleeve (1), and a push rod (7) is connected to the rear end of the cushion block (6). A connecting rod (8) is hinged between the push rod (7) and the clamping rod (5) through a hinge shaft (9). A bracket (11) is slidably connected under the push rod (7), and a telescopic member 1 (12) is installed under the bracket (11). The telescopic member 1 (12) is supported and fixed by a mounting frame (13), and a telescopic member 2 (15) for driving the push rod (7) to move horizontally is also installed on the rear side of the mounting frame (13). A support plate (14) is installed under the telescopic member 2 (15), and the support plate (14) is vertically slidably connected to the mounting frame (13).

5. A forging bidirectional pier head tooling according to claim 4, characterized in that: The upper edge of the cushion block (6) protrudes from the upper edge of the push rod (7).

6. A forging bidirectional pier head tooling according to claim 4, characterized in that: The mounting frame (13) is also provided with a through slot, and the output shaft of the second telescopic member (15) passes through the interior of the through slot.

7. A forging bidirectional pier head tooling according to claim 4, characterized in that: A sliding groove is provided in the push rod (7), and a hinge shaft (9) for connecting the push rod (7) and the connecting rod (8) slides through the interior of the sliding groove.

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