A method of forging a monolithic bulkhead

Abstract

The application provides a forging forming method of an integral partition frame, and relates to the field of forging.The forging forming method of the integral partition frame comprises the following steps: plate-shaped initial blank forming; pressing a rod-shaped blank along the diameter direction of the rod-shaped blank to widen the rod-shaped blank, so that the plate-shaped initial blank is obtained; target forging forming; and placing the plate-shaped initial blank in a forming die designed according to the target forging during the forming, so that the target forging is pressed to obtain the target forging.The forming die comprises an upper die and a lower die, the distance from the skin part forming boss of the lower die to the parting surface is greater than the distance from the skin part forming boss of the upper die to the parting surface, and a plurality of positioning bridge extension parts are arranged on the lower die.The plate-shaped initial blank is positioned by abutting and cooperating with the edges of the plate-shaped initial blank through the bridge extension parts during the target forging forming, so that the plate-shaped initial blank is fixed.

Description

Technical Field

[0001] This invention relates to the field of forging, specifically a forging method for an integral partition frame. Background Technology

[0002] Typically, integral partition frames are machined from frameless perforated plate-shaped forging blanks of similar shape. The preparation of the forging blank raw materials requires multiple forging processes, and in order to meet the requirements of ultrasonic testing, the amount of material removed by machining on the surface of the forging blank is large, resulting in high manufacturing costs for the partition frames.

[0003] To reduce material waste, Chinese Patent Application Publication No. CN117718421A discloses a method for forging an integral titanium alloy spacer frame. This method involves directly placing a bar-shaped billet into a forming die for forging. While this method can save material, to promote material flow, a thin connecting layer is typically designed at the hole positions of the spacer frame. Therefore, a forming boss for the connecting layer is set in the die cavity during forging. However, in existing forming methods, the connecting layer is designed to be symmetrically distributed along the parting line. In this way, when the billet is formed in the cavity, it first contacts the forming boss of the connecting layer on the lower die. The billet cannot fall into the cavity well during forming, which can cause unstable positioning and poor material entry into the cavity, resulting in inconsistent forging quality. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a forging method for an integral partition frame, so as to solve the problems of unstable positioning and poor material entry into the cavity caused by the material not falling well into the cavity during the forging process.

[0005] The technical solution adopted by this invention to solve its technical problem is: a forging method for an integral partition frame, comprising the following steps:

[0006] Plate-shaped blank design; a frameless plate-shaped blank is designed according to the shape of the partition frame, wherein the length of the plate-shaped blank is the same as the length of the partition frame;

[0007] Cutting: Cut the sheet-shaped billet according to its dimensions to obtain a rod-shaped billet;

[0008] Plate-shaped initial blank forming; pressing down the rod-shaped blank along the diameter direction to widen the rod-shaped blank until the size of the rod-shaped blank meets the requirements, thereby obtaining the plate-shaped initial blank;

[0009] The target forging is formed by placing the plate-shaped blank in a forming mold designed according to the shape of the partition frame and a connecting part disposed in the frame hole of the partition frame body. During forming, the plate-shaped blank is placed in a forming mold designed according to the target forging and pressed to obtain the target forging. The forming mold includes an upper mold and a lower mold that cooperate with each other. The distance from the forming boss of the connecting part of the lower mold to the parting surface is greater than the distance from the forming boss of the connecting part of the upper mold to the parting surface. The lower mold is provided with a plurality of positioning bridge extensions. The height of the bridge extensions is greater than the height of the forming boss of the connecting part of the lower mold. During the forming of the target forging, the plate-shaped blank is positioned by the abutting fit between the bridge extensions and the edge of the plate-shaped blank to fix the plate-shaped blank.

[0010] The material attached to the outer layer of the target forging is removed to ultimately form the partition frame.

[0011] Furthermore, the height of the bridge extension is H, h+20≤H≤h+30, where h is the height of the forming boss of the connecting skin part of the lower mold.

[0012] Furthermore, the bridge extension has at least three parts, one of which is located on one side of the cavity of the lower mold, and the other two are located at both ends of the cavity of the lower mold.

[0013] Furthermore, the partition frame is made of titanium alloy.

[0014] Furthermore, during the forming process of the plate-shaped billet, the deformation per heat of the rod-shaped billet is controlled at 20%-50%, and during the forming process of the target forging, the pressing speed of the plate-shaped billet is 2-5 mm / s, and the deformation per heat is controlled at 20%-50%.

[0015] Furthermore, the plate-shaped billet forming step is performed using a high-speed forging machine.

[0016] The beneficial effects of this invention are as follows: In the forging method of an integral partition frame of this invention, the distance from the forming boss 43 of the connecting part of the lower die 41 to the parting surface 44 is set to be greater than the distance from the forming boss 43 of the connecting part of the upper die 42 to the parting surface 44. This allows the plate-shaped blank to fall into the cavity of the lower die better when forming the target forging 2, which is conducive to the flow of material to the die cavity and thus facilitates the forming of the forging. The lower die 41 is provided with multiple positioning bridge extensions 411. During the forming process, the bridge extensions 411 abut against the edge of the plate-shaped blank 3 to fix the plate-shaped blank 3. The plate-shaped blank is conveniently positioned and the blank is stably positioned in the cavity. This ensures that the position of the plate-shaped blank 3 will not change during forming, thereby improving the forming stability of the target forging, reducing the probability of producing defective products, and helping to reduce production costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the existing forming die structure for the target forging;

[0018] Figure 2 This is a schematic diagram of the target forging using existing die forging methods;

[0019] Figure 3 This is a structural diagram of the partition frame;

[0020] Figure 4 This is a schematic diagram of the structure of a plate-shaped initial billet;

[0021] Figure 5 This is a schematic diagram of the target forging;

[0022] Figure 6 yes Figure 5 Sectional view along AA;

[0023] Figure 7 This is a schematic diagram of the forming mold structure for the target forging of the present invention;

[0024] Figure 8 This is a schematic diagram of the target forging using the die forging method of the present invention;

[0025] Figure 9 This is a top view of the lower mold structure.

[0026] The figure shows: 1 partition frame, 2 target forging, 3 plate-shaped blank, 101 partition frame body, 201 connecting skin, 102 frame hole, 41 lower die, 42 upper die, 43 forming boss of connecting skin, 44 parting surface, 45 bridge, and 411 bridge extension. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] like Figure 1 and Figure 2 As shown, in existing die forging processes for frame parts, the connecting boss 43 of the upper die 42 and the connecting boss 43 of the lower die are designed symmetrically with respect to the parting surface 44. That is, the distance from the connecting boss 43 of the upper die 42 to the parting surface 44 is equal to the distance from the connecting boss 43 of the lower die 41 to the parting surface 44. This causes the billet to first contact the connecting boss 43 of the lower die during the forging process, preventing it from falling into the cavity. This results in unstable positioning and poor material flow into the cavity, affecting the forging quality. Figures 3 to 8 To address the aforementioned problems, the present invention provides a forging method for an integral partition frame, comprising the following steps:

[0029] Step 1: Design of plate-shaped blank 3; Design a frameless plate-shaped blank 3 with a similar shape to the shape of the partition frame 1, wherein the length of the plate-shaped blank 3 is the same as the length of the partition frame 1;

[0030] Step 2: Blanking; Blanking is performed according to the dimensions of the plate-shaped billet 3 to obtain a rod-shaped billet;

[0031] Step 3: Forming the plate-shaped billet 3; Pressing the rod-shaped billet down along its diameter to widen it until the dimensions of the rod-shaped billet meet the requirements, thereby obtaining the plate-shaped billet 3;

[0032] Step 4: Forming the target forging 2; The target forging 2 has a frame body portion 101 corresponding to the shape of the frame 1, and also has a connecting portion 201 disposed in the frame hole 102 of the frame body portion 101. During forming, the plate-shaped blank 3 is placed in a forming mold designed according to the target forging 2 and pressed to obtain the target forging 2. The forming mold includes an upper mold 42 and a lower mold 41 that cooperate with each other. The distance from the connecting portion forming boss 43 of the lower mold 41 to the parting surface 44 is greater than that of the connecting portion forming boss of the upper mold 42. The distance from the parting surface 44 to the parting surface 43 is such that the lower mold 41 is provided with a plurality of positioning bridge extensions 411. The height of the bridge extensions 411 is greater than the height of the forming boss 43 of the connecting skin part of the lower mold 41. When the target forging 2 is formed, the bridge extensions 411 are positioned by abutting against the edge of the plate-shaped blank 3 to fix the plate-shaped blank 3 in the lower mold cavity, thereby fixing the plate-shaped blank 3 and preventing the plate-shaped blank 3 from sliding out from the bridge 45 during forming, ensuring that the position of the plate-shaped blank 3 will not change during forming.

[0033] Step 5: Remove the material from the skin portion 201 of the target forging 2 to finally form the partition frame 1.

[0034] Understandably, in order to facilitate material flow, a smooth transition should be adopted between the skin portion 201 of the target forging 2 and the frame body portion 101.

[0035] This invention first forms a plate-shaped initial blank from a rod-shaped billet, with the same length as the partition frame. Then, the plate-shaped initial blank is placed in a forming mold for die forging, which facilitates the placement and positioning of the plate-shaped initial blank within the forming mold. During the die forging process, such as... Figure 8As shown, in this invention, the distance from the forming boss 43 of the connecting part of the lower die 41 to the parting surface 44 is set to be greater than the distance from the forming boss 43 of the connecting part of the upper die 42 to the parting surface 44. That is, the height of the forming boss 43 of the lower die is reduced, so that when forming the target forging 2, the plate-shaped blank can fall better into the cavity of the lower die. This allows the plate-shaped blank to be better restricted by the cavity wall of the lower die and the bridge part 45 during the forming of the target forging 2, which is beneficial for the material to flow into the die cavity and thus for the forming of the forging. Figure 9 As shown, the present invention also provides multiple positioning bridge extensions 411 on the lower mold 41. During the forming process, the bridge extensions 411 abut against the edge of the plate-shaped blank 3 to fix the plate-shaped blank 3, ensuring stable positioning of the blank in the lower mold cavity, facilitating its placement, and ensuring that the position of the plate-shaped blank 3 does not change during forming. Therefore, the method of the present invention improves the forming stability of the target forging through the above measures.

[0036] In this invention, the higher the height of the bridge extension 411, the greater the adverse effect on the forming of the target forging 2; conversely, if it is too low, the positioning effect is relatively poor. Taking all factors into consideration, the optimal height of the bridge extension 411 in this invention is H, where (h+20)mm≤H≤(h+30)mm, and h is the height of the forming boss 43 of the connecting skin portion of the lower die 41.

[0037] The bridge extension 411 serves to fix the plate-shaped blank 3, preventing its position from changing during the forming of the target forging 2. The bridge extension 411 can be two or more. For example... Figure 9 As shown in the embodiment of the present invention, there are three bridge extensions 411, one of which is disposed on one side of the cavity of the lower mold 41, and the other two are disposed at both ends of the cavity of the lower mold 41.

[0038] The partition frame can be made of various metals. In one embodiment of the present invention, the partition frame is made of titanium alloy. When the partition frame is made of titanium alloy, during the forming process of the plate-shaped billet 3, the deformation per burn of the rod-shaped billet is controlled at 20%-50%; during the forming process of the target forging 2, the pressing speed of the plate-shaped billet 3 is preferably 2-5 mm / s, and when the deformation per burn is controlled at 20%-50%, the quality of the obtained target forging and partition frame parts is optimal.

[0039] To improve production efficiency, the forming step of the plate-shaped billet 3 is preferably performed using a high-speed forging machine. Compared with a conventional forging machine, the high-speed forging machine has a higher operating frequency and higher production efficiency. It can also reduce the number of forging passes required to form the plate-shaped billet, and the high-speed forging machine has lower energy consumption and depreciation costs, thus saving costs.

Claims

1. A method of forging a monolithic bulkhead, characterized by, Includes the following steps: Plate-shaped blank (3) design: A plate-shaped blank (3) without frame holes is designed according to the shape of the partition frame (1), wherein the length of the plate-shaped blank (3) is the same as the length of the partition frame (1); Cutting: Cut the billet according to the dimensions of the plate-shaped billet (3) to obtain a rod-shaped billet; The plate-shaped blank (3) is formed; the rod-shaped blank is pressed down along the diameter direction to widen the rod-shaped blank until the size of the rod-shaped blank meets the requirements, thereby obtaining the plate-shaped blank (3); The target forging (2) is formed; the target forging (2) has a frame body part (101) corresponding to the shape of the frame (1), and also has a connecting part (201) provided in the frame hole (102) of the frame body part (101). During forming, the plate-shaped blank (3) is placed in a forming mold designed according to the target forging (2) and pressed to obtain the target forging (2). The forming mold includes an upper mold (42) and a lower mold (41) that cooperate with each other. The connecting part of the lower mold (41) has a forming boss. (43) The distance to the parting surface (44) is greater than the distance from the forming boss (43) of the upper mold (42) to the parting surface (44). The lower mold (41) is provided with a plurality of positioning bridge extensions (411). The height of the bridge extensions (411) is greater than the height of the forming boss (43) of the lower mold (41). When the target forging (2) is formed, the bridge extensions (411) are positioned by abutting against the edge of the plate blank (3) to fix the plate blank (3). Remove the material from the skin portion (201) of the target forging (2) to finally form the partition (1).

2. The forging method for an integral partition frame as described in claim 1, characterized in that, The height of the bridge extension (411) is H, (h+20)mm≤H≤(h+30)mm, where h is the height of the connecting skin forming boss (43) of the lower mold (41).

3. The forging method for an integral partition frame as described in claim 1, characterized in that, The bridge extension (411) has at least three parts, one of which is located on one side of the cavity of the lower mold (41), and the other two are located at both ends of the cavity of the lower mold (41).

4. The forging method for an integral partition frame as described in claim 1, characterized in that, The partition frame is made of titanium alloy.

5. The forging method for an integral partition frame as described in claim 4, characterized in that, During the forming process of the plate-shaped billet (3), the deformation per fire of the rod-shaped billet is controlled at 20%-50%. During the forming process of the target forging (2), the pressing speed of the plate-shaped billet (3) is 2-5 mm / s, and the deformation per fire is controlled at 20%-50%.

6. The forging method for an integral partition frame as described in claim 1, characterized in that, The forming step of the plate-shaped billet (3) is performed using a high-speed forging machine.

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