Forging forming method of integral bulkhead

Abstract

The invention provides a forging forming method for an integral bulkhead, aims to solve the problems that materials cannot well fall into a cavity in the forging process of a forge piece, so that positioning is not stable, and the materials cannot well enter the cavity, and relates to the field of forging. A forging forming method of an integral bulkhead comprises the steps that a plate-shaped initial blank is formed; the rod-shaped blank is pressed downwards in the diameter direction of the rod-shaped blank, the rod-shaped blank is widened, and therefore the plate-shaped initial blank is obtained; forming a target forge piece; during forming, the plate-shaped initial blank is placed in a forming die designed according to the target forge piece to be pressed to obtain the target forge piece, the forming die comprises an upper die and a lower die, and the distance from a wad part forming boss of the lower die to a parting surface is larger than the distance from a wad part forming boss of the upper die to the parting surface; a plurality of bridge part extending parts for positioning are arranged on the lower die, and when a target forge piece is formed, the bridge part extending parts are matched with the edge of the plate-shaped initial blank in an abutting mode for positioning, so that the plate-shaped initial blank is fixed.

Description

Technical Field

[0001] The invention relates to the field of forging, in particular to a forging forming method for an integral partition frame. Background Art

[0002] Typically, the integral bulkhead is machined from a frameless perforated plate-shaped forging blank of similar shape. The preparation of the forging blank raw material requires multiple forgings, and in order to meet ultrasonic testing requirements, a large amount of forging blank surface is machined and removed, resulting in a high manufacturing cost for the bulkhead.

[0003] In order to reduce material loss, a Chinese patent application with publication number CN117718421A discloses a titanium alloy integral bulkhead forging method, which is to directly place a rod-shaped blank in a forming die for die forging. Although this method can save materials, in order to promote the flow of materials, a thinner skin is usually designed at the hole position of the bulkhead, so a skin forming boss is set in the corresponding cavity of the die during die forging. However, in the existing forming method, the skin is designed to be symmetrically distributed along the parting plane. In this method, when the blank is formed in the cavity, it first contacts the lower die skin forming boss. The blank cannot fall into the cavity well during forming, which will cause unstable positioning and the material cannot enter the cavity well, resulting in unstable quality of forgings. 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 problem of unstable positioning and poor entry of the material into the cavity caused by the material failing to fall into the cavity well during the die forging process.

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

[0006] Design of a plate-shaped preform; designing a plate-shaped preform without a frame hole according to the shape of the partition frame, wherein the length of the plate-shaped preform is consistent with the length of the partition frame;

[0007] Cutting materials; cutting materials according to the size of the plate-shaped blank to obtain a rod-shaped blank;

[0008] Forming a plate-shaped blank; pressing the rod-shaped blank downward along the diameter direction of the rod-shaped blank to widen the rod-shaped blank until the size of the rod-shaped blank meets the requirements, thereby obtaining the plate-shaped blank;

[0009] The target forging is formed; the target forging has a bulkhead body corresponding to the shape of the bulkhead, and also has a skin-connecting part arranged in the frame hole of the bulkhead body. When forming, the plate-like blank is placed in a forming mold designed according to the target forging and pressed to obtain the target forging, wherein the forming mold includes an upper mold and a lower mold that cooperate with each other, the distance from the forming boss of the skin-connecting part of the lower mold to the parting surface is greater than the distance from the forming boss of the skin-connecting part of the upper mold to the parting surface, and 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 skin-connecting part of the lower mold, and when the target forging is formed, the bridge extensions are abutted against the edges of the plate-like blank to fix the plate-like blank;

[0010] The skin material of the target forging is removed to finally form the bulkhead.

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

[0012] Furthermore, there are at least three bridge extensions, one of which is arranged at one side of the cavity of the lower mold, and the other two are respectively arranged at two ends of the cavity of the lower mold.

[0013] Furthermore, the bulkhead material is titanium alloy.

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

[0015] Furthermore, the plate-shaped blank forming step adopts a rapid forging machine.

[0016] The beneficial effects of the present invention are as follows: in a forging forming method of an integral partition frame of the present invention, the distance from the skin-connecting forming boss 43 of the lower die 41 to the parting surface 44 is set to be greater than the distance from the skin-connecting forming boss 43 of the upper die 42 to the parting surface 44, so that when forming the target forging 2, the plate-like blank can be better dropped into the cavity of the lower die, which is beneficial to the flow of material to the mold cavity, thereby facilitating the forming of the forging, and a plurality of positioning bridge extensions 411 are provided on the lower die 41, and during the forming process, the bridge extensions 411 are abutted and cooperated with the edges of the plate-like blank 3 to fix the plate-like blank 3, which facilitates the positioning of the plate-like blank and ensures that the blank is stably positioned in the cavity, and ensures that the position of the plate-like blank 3 will not change during forming, thereby improving the forming stability of the target forging, reducing the probability of producing unqualified products, and helping to reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 It is a schematic diagram when the target forging is forged by the existing die forging method;

[0019] Figure 3 It is a structural diagram of the bulkhead;

[0020] Figure 4 It is a schematic diagram of the structure of a plate-shaped preform;

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

[0022] Figure 6 yes Figure 5 Section along AA;

[0023] Figure 7 It is a schematic diagram of the structure of a forming die of the target forging of the present invention;

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

[0025] Fig. 9 Schematic diagram of the top view of the lower die;

[0026] As shown in the figure: a bulkhead 1, a target forging 2, a plate-shaped blank 3, a bulkhead body 101, a skin-connecting portion 201, a frame hole 102, a lower die 41, an upper die 42, a skin-connecting portion forming boss 43, a parting surface 44, a bridge portion 45, and a bridge portion extension 411. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0028] like Figure 1 and Figure 2 As shown, when the existing bulkhead parts are formed by die forging, the skin-forming boss 43 of the upper die 42 and the skin-forming boss 43 of the lower die are designed symmetrically with respect to the parting surface 44. That is, the distance from the skin-forming boss 43 of the upper die 42 to the parting surface 44 is equal to the distance from the skin-forming boss 43 of the lower die 41 to the parting surface 44. In this way, when forming the target forging 2, the blank will first contact the skin-forming boss 43 of the lower die during the swinging process, and the blank cannot fall into the cavity, resulting in unstable positioning and the material cannot flow into the cavity well, affecting the forming quality of the forging. Figures 3 to 8 In order to solve the above problems, a forging method of an integral bulkhead of the present invention comprises the following steps:

[0029] Step 1, designing a plate-shaped preform 3; designing a frameless plate-shaped preform 3 with a similar shape according to the shape of the partition frame 1, wherein the length of the plate-shaped preform 3 is consistent with the length of the partition frame 1;

[0030] Step 2, blanking: blanking according to the size of the plate-shaped blank 3 to obtain a rod-shaped blank;

[0031] Step 3, forming a plate-shaped blank 3; pressing the rod-shaped blank downward along the diameter direction of the rod-shaped blank to widen the rod-shaped blank until the size of the rod-shaped blank meets the requirements, thereby obtaining the plate-shaped blank 3;

[0032] Step 4, forming the target forging 2; the target forging 2 has a bulkhead body 101 corresponding to the shape of the bulkhead 1, and also has a skin-connecting part 201 arranged in the frame hole 102 of the bulkhead body 101. During the forming process, 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, wherein the forming mold includes an upper mold 42 and a lower mold 41 that cooperate with each other, and the distance from the skin-connecting part forming boss 43 of the lower mold 41 to the parting surface 44 is greater than the distance from the skin-connecting part forming boss 43 of the upper mold 42 to the parting surface 44. 43 to the parting surface 44, the lower die 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 skin-connecting portion of the lower die 41, when the target forging 2 is formed, the bridge extensions 411 are abutted against the edge of the plate-like blank 3 to be positioned, so that the plate-like blank 3 is clamped and fixed in the lower mold cavity, thereby fixing the plate-like blank 3, preventing the plate-like blank 3 from sliding out of the bridge 45 during forming, and ensuring that the position of the plate-like blank 3 will not change during forming;

[0033] Step 5: removing the material of the skinned portion 201 of the target forging 2 to finally form the bulkhead 1.

[0034] It is understandable that, in order to facilitate material flow, a smooth transition should be adopted between the skin-connecting portion 201 of the target forging 2 and the bulkhead body portion 101 .

[0035] The present invention first forms the rod-shaped blank into a plate-shaped blank of the same length as the bulkhead, and then places the plate-shaped blank in a forming die for forging, which makes it easier to place and position the plate-shaped blank in the forming die. Figure 8As shown, the present invention sets the distance from the skin-joining forming boss 43 of the lower die 41 to the parting surface 44 to be greater than the distance from the skin-joining forming boss 43 of the upper die 42 to the parting surface 44, that is, the height of the skin-joining forming boss 43 of the lower die is reduced, so that the plate-shaped blank can be better placed in the cavity of the lower die when forming the target forging 2, so that the plate-shaped blank can be better restricted by the lower mold cavity wall and the bridge 45 during the process of forming the target forging 2, which is beneficial for the material to flow to the mold cavity, thereby facilitating the forming of the forging. Fig. 9 As shown, the present invention also provides a plurality of positioning bridge extensions 411 on the lower die 41, and during the forming process, the bridge extensions 411 abut against the edges of the plate-shaped blank 3 to fix the plate-shaped blank 3, thereby ensuring that the blank is stably positioned 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 the present invention, the higher the height of the bridge extension 411 is, the greater the adverse effect on the forming of the target forging 2 is, while if it is too low, the positioning effect is relatively poor. Taking all factors into consideration, in the present invention, the optimal height of the bridge extension 411 is H, (h+20) mm≤H≤(h+30) mm, where h is the height of the skin-jointed forming boss 43 of the lower die 41.

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

[0038] The material of the bulkhead can be various metal materials. In one embodiment of the present invention, the material of the bulkhead is titanium alloy. When the material of the bulkhead is titanium alloy, during the forming process of the plate-shaped blank 3, the deformation amount of the rod-shaped blank per fire is controlled to be 20%-50%; during the forming process of the target forging 2, the pressing speed of the plate-shaped blank 3 is preferably 2-5mm / s. When the deformation amount per fire is controlled to be 20%-50%, the quality of the target forging and the bulkhead parts is the best.

[0039] In order to improve production efficiency, the step of forming the plate-shaped blank 3 preferably uses a fast forging machine. Compared with ordinary forging machines, fast forging machines have higher operation frequency and higher production efficiency, and can also reduce the number of firings of the formed plate-shaped blank. In addition, fast forging machines have lower energy usage and depreciation costs, which can also save costs.

Claims

1. A forging method for an integral bulkhead, It is characterized in that The following steps are involved: Designing a plate-shaped preform (3); designing a plate-shaped preform (3) without a frame hole according to the shape of the partition frame (1), wherein the length of the plate-shaped preform (3) is consistent with the length of the partition frame (1); Cutting the material; cutting the material according to the size of the plate-shaped blank (3) to obtain a rod-shaped blank; Forming a plate-shaped blank (3); pressing the rod-shaped blank downward along the diameter direction of the rod-shaped blank 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 bulkhead body (101) corresponding to the shape of the bulkhead (1), and also has a skin-jointing portion (201) arranged in a frame hole (102) of the bulkhead body (101). During the forming process, the plate-shaped blank (3) is placed in a forming die designed according to the target forging (2) to obtain the target forging (2), wherein the forming die includes an upper die (42) and a lower die (41) that cooperate with each other, and the skin-jointing portion forming boss of the lower die (41) The distance between the upper mold (42) and the parting surface (44) is greater than the distance between the skin-forming boss (43) of the upper mold (42) and 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 skin-forming boss (43) of the lower mold (41); when the target forging (2) is formed, the bridge extensions (411) are in contact with the edge of the plate-shaped blank (3) to be positioned, so as to fix the plate-shaped blank (3); The material of the skin-connected portion (201) of the target forging (2) is removed, and finally the bulkhead (1) is formed.

2. A forging method for an integral bulkhead as claimed in claim 1, It is characterized in that The height of the bridge extension portion (411) is H, (h+20) mm≤H≤(h+30) mm, and h is the height of the skin-jointing forming boss (43) of the lower mold (41).

3. A forging method for an integral bulkhead as claimed in claim 1, It is characterized in that There are at least three bridge extensions (411), one of which is arranged at one side of the cavity of the lower mold (41), and the other two are arranged at two ends of the cavity of the lower mold (41).

4. A forging method for an integral bulkhead as claimed in claim 1, It is characterized in that The material of the bulkhead is titanium alloy.

5. A forging method for an integral bulkhead as claimed in claim 4, It is characterized in that During the forming process of the plate-shaped blank (3), the deformation amount of the rod-shaped blank per fire is controlled at 20%-50%. During the forming process of the target forging (2), the pressing speed of the plate-shaped blank (3) is 2-5 mm / s, and the deformation amount of each fire is controlled at 20%-50%.

6. A forging method for an integral bulkhead as claimed in claim 1, It is characterized in that The step of forming the plate-shaped blank (3) adopts a rapid forging machine.

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