A tool for forging an inner-cone flat cover

Abstract

The utility model relates to a kind of tool of forging inner cone flat cover, tool includes: hydraulic press, hydraulic press includes platform and erecting lift mechanism on the upper end of platform, the piston rod of lift mechanism lower end connects pressure head;Lower mould, place on platform, position corresponds to the lower of pressure head, middle is equipped with through hole, through hole is inverted round table shape;Forging, set on the upper end of lower mould, lower end has a part and enters into through hole, and the part extends to the surface of platform towards lower end;Upper die, card into the upper end of forging, upper die includes: first, for cylinder, upper end with the upper end of forging flush;Second, set on the lower end of first, for inverted round table shape;Among them, lower mould, forging and upper die coaxially set.The tool of the utility model is simple in structure, easy to process, high in efficiency, and stable in shape and performance.

Description

Technical Field

[0001] This utility model relates to the field of forging equipment technology, and in particular to a tooling for forging an inner conical flat cover. Background Technology

[0002] The inner conical flat cap has two integrally formed parts: the upper part is cylindrical with an inverted frustum-shaped groove at the top, and the lower part is also inverted frustum-shaped. During forging, the inner conical flat cap is usually produced with a large amount of raw material according to the maximum outline of the product, and is formed through multiple forgings. The outer part can be forged into a small shape, while the inner groove can only be filled or pressed into a small shape with a punch, and then machined to form the final shape.

[0003] The above methods involve long forging, heat treatment, and machining times, low efficiency, and significant performance differences within the same batch of products.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model discloses a tooling for forging an inner conical flat cover, thereby solving the problem of low forging efficiency of the inner conical flat cover.

[0006] The technical solution adopted in this utility model is as follows: A tooling for forging an inner conical flat cap includes: a hydraulic press, the hydraulic press including a platform and a lifting mechanism mounted on the upper part of the platform, the piston rod at the lower end of the lifting mechanism being connected to a pressure head; a lower die, placed on the platform, positioned below the pressure head, with a through hole in the middle, the through hole being an inverted frustum shape; a forging, disposed on the upper end of the lower die, a portion of its lower end being inserted into the through hole, and this portion extending downwards to the surface of the platform; and an upper die, inserted into the upper end of the forging, the upper die including: a first part, which is a cylinder, the upper end of which is flush with the upper end of the forging; and a second part, disposed below the first part, which is an inverted frustum shape; wherein the lower die, the forging, and the upper die are coaxially arranged.

[0007] A further technical solution is that the forging includes: a third part, which is a cylinder with a groove at the upper end, the shape of which corresponds to the upper mold; and a fourth part, which is an inverted frustum shape, connected to the lower end of the third part and inserted into the through hole.

[0008] A further technical solution is that the outer diameter of the forging is larger than the outer diameter of the lower die.

[0009] A further technical solution is that the inner side of the lower mold has a chamfer at the edge of the upper end of the through hole, and the outer edge of the lower end of the second part has a chamfer.

[0010] A further technical solution is that the first part and the second part are integrally formed.

[0011] A further technical solution is that the upper and lower molds are made of alloy steel 42CrMo4.

[0012] A further technical solution is that the hydraulic press also includes a centering device, which includes two telescopic cylinders and two guide sleeves symmetrically arranged around the axis of the forging. The telescopic cylinders and guide sleeves are located on both sides of the platform and are mounted on the ground. The piston rod of the telescopic cylinder passes through the guide sleeve, and the end of the piston rod near the forging is connected to a clamping arm. The telescopic cylinder is horizontally arranged and can drive the piston rod to extend or retract toward the axis so that the two clamping arms hold the lower die, the blank, or the upper die on both sides.

[0013] A further technical solution is that the end of the clamping arm near the forging is arc-shaped, and several rollers are rotatably arranged on the inner side along the arc surface. The rollers protrude from the arc surface, and at least two of the rollers are tangent to the outer diameter of the lower die or the upper die.

[0014] The beneficial effects of this utility model embodiment are as follows: (I) A tooling for forging an inner conical flat cover according to an embodiment of the present utility model, by first placing the blank in the middle of the upper end of the lower die, and slightly upsetting it so that part of the blank is pressed into the through hole of the lower die to position the blank and the lower die, then placing the upper die in the middle of the upper end of the blank, upsetting the upper die, the blank and the lower die to the set size, a coaxial lower die, forging and upper die can be obtained. After demolding, the forging can be processed. The structure is simple, the processing is convenient and efficient, and the shape and performance are stable.

[0015] (ii) Furthermore, the hydraulic press also includes a centering device, which performs centering when the billet is placed on the lower die and when the upper die is placed on the billet. The piston rod of the telescopic cylinder extends and drives the clamping arm to move toward the set axis. The clamping arm pushes the lower die, the billet or the upper die to move toward the set axis, ensuring that the billet can flow evenly in all directions during upsetting and ensuring product quality. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the tooling for the forged inner cone flat cover of this utility model.

[0017] Figure 2 This is a cross-sectional view of the inner conical flat cover forging of this utility model.

[0018] Figure 3 This is a top view of the hydraulic press used in the tooling for forging the inner conical flat cover of this utility model.

[0019] In the picture: 1. Upper mold; 11. First part; 12. Second part; 2. Lower mold; 21. Through hole; 3. Forging; 31. Third part; 311. Groove; 32. Fourth part; 4. Hydraulic press; 41. Platform; 5. Centering device; 51. Column; 52. Telescopic cylinder; 53. Guide sleeve; 54. Arm; 541. Roller. Detailed Implementation

[0020] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0021] Example: This embodiment discloses a tooling for forging an inner conical flat cap.

[0022] like Figure 1 As shown, the tooling includes a hydraulic press 4, a lower die 2, a forging 3, and an upper die 1.

[0023] The hydraulic press 4 includes a platform 41 and a lifting mechanism mounted on the upper end of the platform 41, with a piston rod at the lower end of the lifting mechanism connected to a pressure head. For example, the hydraulic press 4 is a commercially available single-arm hydraulic press 4.

[0024] The lower mold 2 is placed on the platform 41, positioned below the pressure head, with a through hole in the middle, which is shaped like an inverted frustum.

[0025] The forging 3 is positioned on the upper end of the lower die 2. A portion of the lower end of the forging 3 is inserted into a through hole, and this portion extends downwards to the surface of the platform 41. For example... Figure 2 As shown, for example, the forging 3 includes a third part 31 and a fourth part 32. The third part 31 is a cylinder with a groove 311 at its upper end, the shape of which corresponds to the upper mold 1. The fourth part 32 is an inverted frustum shape, connected to the lower end of the third part 31, and inserted into the through hole.

[0026] The upper die 1 is inserted into the upper end of the forging 3. The upper die 1 includes a first part 11 and a second part 12. The first part 11 is a cylinder, with its upper end flush with the upper end of the forging 3, which facilitates the stable pressing of the upper die 1 into the blank. The second part 12 is located at the lower end of the first part 11 and is in the shape of an inverted frustum. Specifically, the first part 11 and the second part 12 are integrally formed. The lower die 2, the forging 3, and the upper die 1 are coaxially arranged.

[0027] Furthermore, the upper die 1 and lower die 2 are made of 42CrMo4 alloy steel. Specifically, the upper die 1 and lower die 2 are forged at 1230℃, with a holding time equal to the thickness of the forging blank multiplied by 0.2 min. The upper die 1 is formed by free forging, and the lower die 2 is formed by ring rolling on a ring mill. After forming, they undergo heat treatment: quenching at 930℃, with a holding time equal to the thickness of the forging blank multiplied by 1.2 min; tempering at 620℃, with a holding time equal to the thickness of the forging blank multiplied by 2.4 min; and finally, machining.

[0028] like Figure 1 As shown, preferably, the outer diameter of the forging 3 is larger than the outer diameter of the lower die 2, which facilitates the subsequent spinning and rolling of the die and forging 3 together, thereby improving the cylindricity of the product.

[0029] like Figure 1 As shown, further, the inner side of the lower mold 2 has a chamfer at the edge of the upper end of the through hole, and the outer edge of the lower end of the second part 12 has a chamfer, which facilitates the demolding of the forging 3.

[0030] like Figure 3 As shown, the hydraulic press 4 further includes a centering device 5. The centering device 5 includes several columns 51 symmetrically arranged around the axis of the forging 3, two telescopic cylinders 52, and two guide sleeves 53. The columns 51, telescopic cylinders 52, and guide sleeves 53 are located on both sides of the platform 41. The telescopic cylinders 52 and guide sleeves 53 are mounted on the columns 51. The piston rod of the telescopic cylinder 52 passes through the guide sleeve 53. The end of the piston rod near the forging 3 is connected to a clamping arm 54. The telescopic cylinder 52 is horizontally arranged and can drive the piston rod to extend or retract toward the axis, so that the two clamping arms 54 clamp the two sides of the lower die 2 or the upper die 1. Preferably, the end of the clamping arm 54 near the forging 3 is arc-shaped, and several rollers 541 are rotatably arranged along the arc surface on the inner side. The rollers 541 protrude from the arc surface, and at least two rollers 541 are tangent to the outer diameter of the lower die 2 or the upper die 1. The centering resistance is reduced by the rolling friction between the rollers 541 and the die. When placing the lower die 2 on the platform 41 of the hydraulic press 4, placing the blank on the lower die 2, and placing the upper die 1 on the blank, alignment is achieved. The piston rod of the telescopic cylinder 52 extends and drives the clamping arm 54 to move towards a set axis. The clamping arm 54 pushes the lower die 2, the blank, or the upper die 1, causing them to move towards the set axis. Several sets of telescopic cylinders 52 and clamping arms 54 are arranged at intervals along the length of the column 51 to ensure simultaneous alignment of the lower die 2, the blank, and the upper die 1. Of course, in other embodiments of this invention, the operator can also manually measure the alignment using a ruler.

[0031] Forging 3 involves the following steps during forging: Feeding.

[0032] Forging heating: Heat to 850±50℃ and hold for 120±30 min; heat to 1250±15℃ and hold for 180~240 min.

[0033] Free forging: (1) Upsetting, rolling, drawing, and rolling flat, repeat once. (2) Place the lower die 2 on the platform 41 of the hydraulic press 4, place the billet in the middle of the upper end of the lower die 2, and slightly upset it so that part of the billet is pressed into the through hole of the lower die 2 to position the billet and the lower die 2. (3) Place the upper die 1 in the middle of the upper end of the billet and upset it to the set size. (4) Roll the lower die 2, forging 3 and upper die 1 together.

[0034] In this embodiment, the blank is first placed in the middle of the upper end of the lower die 2, and then slightly upsetting is performed to press part of the blank into the through hole of the lower die 2 to position the blank and the lower die 2. Then, the upper die 1 is placed in the middle of the upper end of the blank, and the upper die 1, the blank and the lower die 2 are upset to the set size to obtain the coaxial lower die 2, forging 3 and upper die 1. After demolding, the forging 3 can be further processed. The structure is simple, the processing is convenient and efficient, and the shape and performance are stable.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A tooling for forging an inner conical flat cap, characterized in that: The tooling includes: A hydraulic press, comprising a platform and a lifting mechanism mounted on the upper part of the platform, wherein the piston rod at the lower end of the lifting mechanism is connected to a pressure head; The lower mold is placed on the platform, positioned below the pressure head, with a through hole in the center, the through hole being a frustum shape; A forging is disposed on the upper end of the lower die, with a portion of the lower end inserted into the through hole, and the portion extending downwards to the surface of the platform; The upper die is inserted into the upper end of the forging, and the upper die includes: The first part is a cylinder, with its upper end flush with the upper end of the forging; The second part, located at the lower end of the first part, is in the shape of an inverted frustum; The lower die, forging, and upper die are coaxially arranged.

2. The tooling for forging an inner conical flat cap according to claim 1, characterized in that, The forging includes: The third part is a cylinder with a groove at the top, the shape of which corresponds to the upper mold. The fourth part is shaped like an inverted frustum and is connected to the lower end of the third part, fitting into the through hole.

3. The tooling for forging an inner conical flat cap according to claim 1, characterized in that: The outer diameter of the forging is larger than the outer diameter of the lower die.

4. The tooling for forging an inner conical flat cap according to claim 1, characterized in that: The inner side of the lower mold has a chamfer at the edge of the upper end of the through hole, and the outer edge of the lower end of the second part has a chamfer.

5. The tooling for forging an inner conical flat cap according to claim 1, characterized in that: The first and second parts are molded as a single piece.

6. The tooling for forging an inner conical flat cap according to claim 1, characterized in that: The upper and lower molds are made of alloy steel 42CrMo4.

7. The tooling for forging an inner conical flat cap according to claim 1, characterized in that: The hydraulic press also includes a centering device, which includes two telescopic cylinders and two guide sleeves symmetrically arranged around the axis of the forging. The telescopic cylinders and guide sleeves are located on both sides of the platform and are mounted on the ground. The piston rod of the telescopic cylinder passes through the guide sleeve, and the end of the piston rod near the forging is connected to a clamping arm. The telescopic cylinder is horizontally arranged and can drive the piston rod to extend or retract toward the axis so that the two clamping arms hold the lower die, the blank, or the upper die on both sides.

8. The tooling for forging an inner conical flat cap according to claim 7, characterized in that: The end of the arm near the forging is arc-shaped, and several rollers are rotatably arranged along the arc surface on the inner side. The rollers protrude from the arc surface, and at least two of the rollers are tangent to the outer diameter of the lower or upper die.

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