Apparatus for forming a perforated dumbbell-shaped part

Abstract

The utility model discloses a device with hole dumbbell -shaped part is along with forming, including mould cover, first mould core, second mould core, pad high ring and punch, first mould core, second mould core set up in mould cover, and first mould core is connected with second mould core contact, pad high ring is connected with mould cover bottom contact, punch is connected with forging equipment, and punch is located the top of mould cover, the use of the utility model makes the material metal streamline of the part produced continuously, and the organization is uniform, and the production process can be continuous, and has the advantages such as little machining allowance, high production efficiency, low manufacturing cost through forging forming.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical manufacturing technology, and in particular relates to a device for forming dumbbell-shaped parts with holes. Background Technology

[0002] A dumbbell-shaped part with a hole, such as Figure 9 As shown, this part has flanges at both ends with different outer diameters and a through hole in the center. It is a commonly used connecting component in various mechanical parts, bearing high loads during use. Due to its high load requirements, it generally needs to be forged to meet the usage requirements. However, because of the complex shape of this part, conventional conformal forging is difficult to achieve. Currently, the conventional manufacturing method is to forge the product as a single, regular cylindrical forging using free forging, and then machine it to the final required dimensions. This method results in large machining allowances, high machining stress, discontinuous product flow lines, unstable quality, low material utilization, low production efficiency, and high manufacturing costs. Therefore, there is a need to find a device for conformal forging of perforated dumbbell-shaped products, enabling rapid forming of the part, reducing machining allowances, maintaining the continuity of the structure, and improving part quality. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a device for the conformal forming of a dumbbell-shaped part with holes.

[0004] This utility model is achieved through the following technical solution.

[0005] This utility model provides a device for forming a dumbbell-shaped part with holes, including a mold sleeve, a first mold core, a second mold core, a shim ring, and a punch. The first mold core and the second mold core are disposed inside the mold sleeve and are in contact with each other. The shim ring is in contact with the bottom of the mold sleeve, and the punch is connected to a forging device and is located above the mold sleeve.

[0006] Preferably, the first mold core is semi-circular, and the inner wall of the first mold core is provided with a first groove, a protrusion and a second groove from top to bottom.

[0007] Preferably, the second mold core is semi-circular, and the inner wall of the first mold core is provided with a first groove, a protrusion and a second groove from top to bottom.

[0008] Preferably, the depth of the first groove is greater than the depth of the second groove.

[0009] Preferably, the protruding corners are rounded.

[0010] Preferably, the mold sleeve is provided with a through hole, through which the first mold core and the second mold core are inserted into the mold sleeve.

[0011] Preferably, the through hole is conical, the outer diameter of the shim ring is larger than the inner diameter of the through hole, and the inner diameter of the shim ring is smaller than the inner diameter of the through hole.

[0012] The beneficial effects of this utility model are as follows:

[0013] The use of this utility model results in parts with continuous metal flow lines and uniform structure, enabling continuous production. Through forging, it has advantages such as small machining allowance, high production efficiency, and low manufacturing cost. Attached Figure Description

[0014] Figure 1 This is a main sectional view of the bar billet being placed into the forming fixture according to this utility model;

[0015] Figure 2 This is a top view of the forming tooling of this utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the mold core and mold sleeve of this utility model;

[0017] Figure 4 This is a schematic diagram of the first-process billet obtained by this utility model;

[0018] Figure 5 This is a schematic diagram of the second process billet obtained by this utility model;

[0019] Figure 6 This is a schematic diagram of the punching state of this utility model;

[0020] Figure 7 This is a schematic diagram of the forging process of the dumbbell-shaped part with holes according to this utility model;

[0021] Figure 8 This is a structural schematic diagram of the dumbbell-shaped forging with holes according to this utility model;

[0022] Figure 9 This is a schematic diagram of a dumbbell-shaped part with holes;

[0023] In the figure: 1-Dumbbell-shaped part with holes, 2-Dumbbell-shaped part forging with holes, 3-First mold core, 4-Second mold core, 5-Mold sleeve, 6-Elevating ring, 7-Bar billet, 8-First process billet, 9-Second process billet, 10-Punch, 11-First groove, 12-Protrusion, 13-Second groove, 14-Through hole, 15-Inner hole. Detailed Implementation

[0024] The technical solution of this utility model is further described below, but the scope of protection is not limited to what is described.

[0025] Example 1:

[0026] like Figures 1 to 8As shown, an apparatus for forming a dumbbell-shaped part with holes includes a die sleeve 5, a first die core 3, a second die core 4, a support ring 6, and a punch 10. The first die core 3 and the second die core 4 are disposed inside the die sleeve 5 and are in contact with each other. The support ring 6 is in contact with the bottom of the die sleeve 5. The punch 10 is connected to a forging device and is located above the die sleeve 5.

[0027] The first mold core 3 is semi-circular, and the inner wall of the first mold core 3 is provided with a first groove 11, a protrusion 12 and a second groove 13 from top to bottom.

[0028] The second mold core 4 is semi-circular, and the inner wall of the first mold core 3 is provided with a first groove 11, a protrusion 12 and a second groove 13 from top to bottom.

[0029] The depth of the first groove 11 is greater than the depth of the second groove 13, which facilitates the formation of a structure in which the outer diameters of the flanges at both ends are inconsistent.

[0030] The corners of the protrusion 12 are rounded.

[0031] The mold sleeve 5 is provided with a through hole 14, through which the first mold core 3 and the second mold core 4 are inserted into the mold sleeve 5.

[0032] The through hole 14 is conical, and the outer diameter of the shim ring 6 is larger than the inner diameter of the through hole 14, while the inner diameter of the shim ring 6 is smaller than the inner diameter of the through hole 14.

[0033] The forging process of obtaining a dumbbell-shaped part 1 with holes by processing the bar billet 7 using this device on a forging equipment includes the following steps:

[0034] A1: Place the mold sleeve 5 above the shim ring 6, put the first mold core 3 and the second mold core 4 into the mold sleeve 5, connect the punch 10 to the forging equipment, complete the assembly of the forming fixture, and place the forming fixture on the forging worktable.

[0035] A2: After heating the bar billet 7, place it into the cavity between the first mold core 3 and the second mold core 4, so that the bottom of the bar billet 7 passes through the padding ring 6 and contacts the forging worktable.

[0036] A3: Then, the bar billet 7 is forged using forging equipment to obtain a dumbbell-shaped part 1 with holes.

[0037] In step A2, the bar billet 7 is heated to 1180°C and then forged after holding at that temperature. The diameter of the bar billet 7 is 100 mm and the holding time is 80 min.

[0038] The forging step in step A3 includes:

[0039] B1: Using the flat anvil of the forging equipment, the upper end of the rough bar billet 7 is upset to fill the upper cavity formed by the first groove 11 on the first mold core 3 and the second mold core 4, thus obtaining the first process billet 8;

[0040] B2: Flip the forming fixture along with the first process blank 8 by 180°, and then use the flat anvil of the forging equipment to upset the upper end of the first process blank 8 so that it fills the lower cavity formed by the second groove 13 on the first mold core 3 and the second mold core 4 to obtain the second process blank 9.

[0041] B3: Flip the forming fixture together with the second process blank 9 by 180°, use the punch 10 to punch out the inner hole 15 on the second process blank 9, then flip the forming fixture together with the second process blank 9 by 180°, and shape the part of the second process blank 9 located in the lower cavity so that it completely fills the lower cavity, to obtain the dumbbell-shaped part 1 with holes.

[0042] B4: Remove the first mold core 3, the second mold core 4 and the perforated dumbbell-shaped part forging 2 as a whole from the mold sleeve 5, then separate the first mold core 3 and the second mold core 4 to complete the forging of the perforated dumbbell-shaped part forging 2, and then machine the perforated dumbbell-shaped part forging 2 to produce the perforated dumbbell-shaped part 1.

Claims

1. A device for the conformal forming of a dumbbell-shaped part with a hole, characterized in that: The device includes a mold sleeve (5), a first mold core (3), a second mold core (4), a shim ring (6), and a punch (10). The first mold core (3) and the second mold core (4) are disposed inside the mold sleeve (5). The first mold core (3) and the second mold core (4) are in contact with each other. The shim ring (6) is in contact with the bottom of the mold sleeve (5). The punch (10) is connected to the forging equipment and is located above the mold sleeve (5).

2. The apparatus for forming a dumbbell-shaped part with a hole as described in claim 1, characterized in that: The first mold core (3) is semi-circular, and the inner wall of the first mold core (3) is provided with a first groove (11), a protrusion (12) and a second groove (13) from top to bottom.

3. The apparatus for conformal forming of a dumbbell-shaped part with a hole as described in claim 1, characterized in that: The second mold core (4) is semi-circular, and the inner wall of the first mold core (3) is provided with a first groove (11), a protrusion (12) and a second groove (13) from top to bottom.

4. The apparatus for forming a dumbbell-shaped part with a hole as described in claim 2 or 3, characterized in that: The depth of the first groove (11) is greater than the depth of the second groove (13).

5. The apparatus for conformal forming of a dumbbell-shaped part with a hole as described in claim 2 or 3, characterized in that: The protrusion (12) has rounded corners.

6. The apparatus for conformal forming of a dumbbell-shaped part with a hole as described in claim 1, characterized in that: The mold sleeve (5) is provided with a through hole (14), and the first mold core (3) and the second mold core (4) are inserted into the mold sleeve (5) through the through hole (14).

7. The apparatus for conformal forming of a dumbbell-shaped part with a hole as described in claim 6, characterized in that: The through hole (14) is conical, the outer diameter of the shim ring (6) is larger than the inner diameter of the through hole (14), and the inner diameter of the shim ring (6) is smaller than the inner diameter of the through hole (14).

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