A kind of liquefied natural gas stainless steel corrugated plate nodular press-inlay mold structure

Abstract

A kind of LNG stainless steel corrugated plate nodal punch insert mould structure belongs to the category of large and small corrugation intersection nodal forming mould system of stainless steel sheet, it is the guide mechanism of forming mould composite motion, with the function of reducing the thinning rate at nodal, it is characterized in that the structure is composed of vertical top block, left three guide surface inclined insert, right three guide surface inclined insert and six guide surface vertical insert parts, including six guide surface vertical top block (1), three guide surface left inclined insert (2) and three guide surface right inclined insert (3), the beneficial effects of the present application are: left first guide inclined surface 19, right first guide inclined surface 22, left auxiliary lifting guide inclined surface 6, right auxiliary lifting guide inclined surface 9 are added, the impact degree when three guide surface left inclined insert 2 and three guide surface right inclined insert 3 begin to contact large corrugation is reduced, the thinning rate at nodal is reduced, and the damage of plastic film is greatly relieved, the product quality at large and small corrugation nodal is improved.

Description

Technical Field

[0001] This invention belongs to the category of stainless steel sheet large and small corrugation intersection nodule forming mold system. It is a guide mechanism for the composite motion of forming mold and has the function of reducing the thinning rate at the nodule. Specifically, it relates to a liquefied natural gas stainless steel corrugated sheet nodule stamping insert mold structure. Background Technology

[0002] The high-precision stainless steel corrugated plates used in liquefied natural gas (LNG) storage tanks are formed simultaneously with both large and small corrugations and nodules. The forming molds are small, and the nodule shapes are complex, making these areas prone to tearing, indentation, and high thinning rates during forming. This fails to meet the French GTT company's M3013 (marine storage tank) quality standard. Furthermore, stamping after covering the surface with a plastic film results in the film being crushed or significantly deformed, also indicating substandard product quality. Due to the operating environment temperature of -160℃, the material thinning rate after stamping must be less than 0.05%. The complex structure at the nodule areas, coupled with the significant pressure exerted by the liquefied natural gas on the stainless steel corrugated plates during transport due to ship movement, further exacerbates the problem. The shape also has high requirements; when forming the nodules, it is necessary to use oblique motion inserts and vertical motion inserts. In particular, the oblique motion inserts are a composite motion of horizontal and vertical motion. The motion is achieved within a specified stroke by relying on the contact guidance between the bottom surface and the oblique surface of the insert and the upper surface and the side surface of the vertical motion mold parts. It is necessary to ensure both motion accuracy and service life of the inserts, avoid the product accuracy decrease due to rapid wear of the inserts, and at the same time ensure that the thinning rate at the contact point between the inserts and the nodules does not exceed the specified requirements. In order to obtain nodules that meet the requirements, the mold inserts are improved and a liquefied natural gas stainless steel corrugated plate nodule stamping insert mold structure is proposed. Summary of the Invention

[0003] A stamping insert structure for stainless steel corrugated sheet nodules used in liquefied natural gas is disclosed. This structure serves as a guide mechanism for the compound motion of the forming die, reducing the thinning rate at the nodules. The structure is characterized by comprising a vertical top block, three left-side inclined guide blocks, three right-side inclined guide blocks, and six vertical guide blocks. The six vertical guide blocks include a left main lifting inclined guide surface, a left auxiliary lifting inclined guide surface, a left horizontal guide plane, a right horizontal guide plane, a right auxiliary lifting inclined guide surface, a right main lifting inclined guide surface, and a vertical insert. The three left-side inclined guide blocks include a left guide plane, a left first guide inclined surface, and a left second guide inclined surface. The three right-side inclined guide blocks... The insert has a right guide plane, a right first guide ramp, and a right second guide ramp. The left horizontal guide plane is slidably mounted against the left guide plane. The left auxiliary lifting guide ramp is slidably mounted against the left first guide ramp. The left main lifting guide ramp is slidably mounted against the left second guide ramp. The right horizontal guide plane is slidably mounted against the right guide plane. The right auxiliary lifting guide ramp is slidably mounted against the right first guide ramp. The right main lifting guide ramp is slidably mounted against the right second guide ramp. The inclined insert push arm pushes the three guide surfaces of the left inclined insert and the three guide surfaces of the right inclined insert to move horizontally. The vertical top block push rod pushes the six guide surfaces of the vertical top block to move vertically.

[0004] As an optimization, the length of the top block horizontal guide surface of the left main lifting guide ramp and the right horizontal guide plane is in the range of 5mm-20mm, the length of the top block auxiliary lifting guide ramp of the left auxiliary lifting guide ramp and the right auxiliary lifting guide ramp is in the range of 5mm-16mm, and the length of the top block main lifting guide ramp of the left horizontal guide plane and the right main lifting guide ramp is in the range of 6mm-30mm.

[0005] As an optimization, the horizontal length of the inclined block guide surface of the left guide plane and the right guide plane is in the range of 3mm-8mm, the length of the inclined block auxiliary lifting guide surface of the left first guide inclined surface and the right first guide inclined surface is in the range of 3mm-12mm, and the length of the inclined block main lifting guide surface of the left second guide inclined surface and the right second guide inclined surface is in the range of 3mm-13mm.

[0006] As an optimization, the left auxiliary lift guide ramp has a left auxiliary lift guide ramp angle, the range of which is 5°-10°; the left main lift guide ramp has a left main lift guide ramp angle, the range of which is 30°-60°; the right auxiliary lift guide ramp has a right auxiliary lift guide ramp angle, the range of which is 5°-10°; and the right main lift guide ramp has a right main lift guide ramp angle, the range of which is 30°-60°.

[0007] Compared with the prior art, the beneficial effects of the present invention are: by adding an auxiliary lifting guide slope and a first guide slope, the present invention reduces the impact of the inclined insert on the large corrugations, reduces the thinning rate at the nodule and the degree of damage to the plastic film, and obtains high-quality large and small corrugation nodules while completing the molding of high-quality small corrugations. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the liquefied natural gas stainless steel corrugated plate nodule stamping insert mold structure of the present invention; Figure 2 This is a schematic diagram of the structure of the inclined insert, the six guide surface vertical top block, and the driving element of the present invention; Figure 3 This is a schematic diagram of the structure of the large and small corrugations and nodules of the present invention; Figure 4 This is a schematic diagram showing the length dimensions of the vertical top block guide surface of the six guide surfaces of the present invention; Figure 5 This is a schematic diagram showing the length of the guide surface of the inclined insert in this invention; Figure 6 This is a schematic diagram comparing the vertical component velocity of the oblique insert of the present invention with that of the original scheme; Figure 7 This is a schematic diagram showing the angle dimensions of the auxiliary lifting guide ramp and the main lifting guide ramp of the present invention.

[0009] In the diagram: 1 - Six guide surfaces, vertical top block; 2 - Three guide surfaces, left oblique insert; 3 - Three guide surfaces, right oblique insert; 4 - Vertical insert; 5 - Left main lift guide slope; 6 - Left auxiliary lift guide slope; 7 - Left horizontal guide plane; 8 - Right horizontal guide plane; 9 - Right auxiliary lift guide slope; 10 - Right main lift guide slope; 11 - Oblique insert push arm; 12 - Vertical top block push rod; 13 - Large corrugation; 14 - Small corrugation; 15 - Left joint; 16 - Right joint; 17 - Top of small corrugation near the joint; 18 - Left guide plane; 19 - Left first guide slope. ; 20-Left second guide ramp; 21-Right guide plane; 22-Right first guide ramp; 23-Right second guide ramp; 24-Length dimension of the top block horizontal guide surface; 25-Length dimension of the top block auxiliary lifting guide ramp; 26-Length dimension of the top block main lifting guide ramp; 27-Horizontal length dimension of the oblique insert guide surface; 28-Length dimension of the oblique insert auxiliary lifting guide ramp; 29-Length dimension of the oblique insert main lifting guide surface; 30-Angle of the left auxiliary lifting guide ramp; 31-Angle of the left main lifting guide ramp; 32-Angle of the right auxiliary lifting guide ramp; 33-Angle of the right main lifting guide ramp. Detailed Implementation

[0010] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, and the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0011] like Figure 1-5The diagram shows a liquefied natural gas stainless steel corrugated plate nodule stamping insert mold structure, characterized in that it has the function of reducing the thinning rate of the nodule part when forming small corrugated nodules. The structure is composed of a vertical top block, three left guide surface inclined inserts, three right guide surface inclined inserts, and six guide surface vertical inserts. The six guide surface vertical top block (1) has a left main lifting guide inclined surface (5), a left auxiliary lifting guide inclined surface (6), a left horizontal direction guide plane (7), a right horizontal direction guide plane (8), a right auxiliary lifting guide inclined surface (9), a right main lifting guide inclined surface (10), and a vertical insert (4). The three guide surface left inclined inserts (2) have a left guide surface... The left horizontal guide plane (18), the left first guide slope (19), and the left second guide slope (20) are attached to the left guide plane (18). The right oblique insert (3) of the three guide planes has a right guide plane (21), a right first guide slope (22), and a right second guide slope (23). The left horizontal guide plane (7) is attached to the left guide plane (18) and the left auxiliary lift guide slope (6) is attached to the left first guide slope (19). The rising speed of the left oblique insert (2) of the three guide planes is reduced so that the impact of the left oblique insert (2) of the three guide planes on the nodule is reduced. The left main lift guide slope (5) is attached to the left first guide slope (20). Two guide ramps (20), the right horizontal guide plane (8) is fitted and slidably installed with the right guide plane (21), the right auxiliary lifting guide ramp (9) is fitted and slidably installed with the right first guide ramp (22), reducing the rising speed of the three guide surface right oblique inserts (3) so that the impact of the three guide surface right oblique inserts (3) on the nodule is reduced, reducing the thinning rate at the nodule, the right main lifting guide ramp (10) is fitted and slidably installed with the right second guide ramp (23), the oblique insert push arm (11) pushes the three guide surface left oblique inserts (2) and the three guide surface right oblique inserts (3) to move horizontally, The vertical top block push rod (12) pushes the six guide surface vertical top blocks (1) to move vertically. The inclined insert push arm (11) and the vertical top block push rod (12) are driven by the hydraulic servo system to maintain a stable speed. The stainless steel corrugated plate includes large corrugations (13), small corrugations (14), left nodule (15), right nodule (16) and the top of the small corrugation near the nodule (17). The three guide surface left inclined inserts (2) guide the formation of the left nodule (15). The three guide surface right inclined inserts (3) guide the formation of the right nodule (16). The vertical insert (4) guides the formation of the top of the small corrugation near the nodule (17).

[0012] As one embodiment of the present invention, such as Figure 6As shown, due to the addition of the left auxiliary lifting guide slope (6), the right auxiliary lifting guide slope (9), the left first guide slope (19), and the right first guide slope (22), the vertical velocity of the original three guide surfaces left oblique insert (2) and the three guide surfaces right oblique insert (3) is the velocity at both ends of S2. The velocity change is large, the acceleration and impact are large, which causes the thinning rate at the nodule to increase and the plastic film to break. The present invention divides the velocity into three segments, where the distance between S1 and S2 is small, and a small velocity is added between S1 and S3, which greatly reduces the vertical velocity of the three guide surfaces left oblique insert (2) and the three guide surfaces right oblique insert (3). At the same time, it also reduces the acceleration and impact when the velocity changes, reduces the thinning rate at the nodule, and greatly alleviates the breakage of the plastic film.

[0013] As one embodiment of the present invention, such as Figure 4 As shown, the length dimension (24) of the top block horizontal guide surface of the left main lifting guide slope (5) and the right horizontal guide plane (8) is in the range of 5mm-20mm, the length dimension (25) of the top block auxiliary lifting guide slope of the left auxiliary lifting guide slope (6) and the right auxiliary lifting guide slope (9) is in the range of 5mm-16mm, and the length dimension (26) of the top block main lifting guide slope of the left horizontal guide plane (7) and the right main lifting guide slope (10) is in the range of 6mm-30mm.

[0014] As one embodiment of the present invention, such as Figure 5 As shown, the horizontal length dimension (27) of the inclined insert guide surface of the left guide plane (18) and the right guide plane (21) ranges from 3mm to 8mm, the length dimension (28) of the inclined insert auxiliary lifting guide surface of the left first guide slope (19) and the right first guide slope (22) ranges from 3mm to 12mm, and the length dimension (29) of the inclined insert main lifting guide surface of the left second guide slope (20) and the right second guide slope (23) ranges from 3mm to 13mm.

[0015] As one embodiment of the present invention, such as Figure 7 As shown, the left auxiliary lift guide slope (6) has a left auxiliary lift guide slope angle (30), the range of which is 5°-10°; the left main lift guide slope (5) has a left main lift guide slope angle (31), the range of which is 30°-60°; the right auxiliary lift guide slope (9) has a right auxiliary lift guide slope angle (32), the range of which is 5°-10°; and the right main lift guide slope (10) has a right main lift guide slope angle (33), the range of which is 30°-60°.

[0016] Working principle: A liquefied natural gas stainless steel corrugated plate nodule stamping insert mold structure is provided. It adds a left first guide slope 19, a right first guide slope 22, a left auxiliary lifting guide slope 6, and a right auxiliary lifting guide slope 9. This reduces the impact when the left-side inclined insert 2 and the right-side inclined insert 3 of the three guide surfaces initially contact the large corrugations, thereby reducing the thinning rate at the nodule and significantly mitigating plastic film damage. After multiple trials, the dimensional parameters of the six guide surface vertical top block 1, the three guide surface left-side inclined insert 2, and the three guide surface right-side inclined insert 3 were obtained. This achieves a balance between manufacturing qualified products and extending the service life of the insert mold.

[0017] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0018] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention. The scope of the invention is defined by the appended claims and their equivalents. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present invention. For example, adding one or two more insert guide surfaces, changing the transition fillet size parameters between the six guide surfaces and the vertical top block guide surface, etc., are all within the scope of protection of the present invention.

Claims

1. A die structure for stamping inserts of stainless steel corrugated sheet nodules for liquefied natural gas, characterized in that it reduces the thinning rate of the nodule portion during the forming of small corrugated nodules. The structure consists of a guide surface vertical top block, three guide surface left inclined blocks, and three guide surface right inclined blocks; the six guide surface vertical top blocks (1) have a left main lifting guide inclined surface (5), a left auxiliary lifting guide inclined surface (6), a left horizontal direction guide plane (7), a right horizontal direction guide plane (8), a right auxiliary lifting guide inclined surface (9), a right main lifting guide inclined surface (10), and a vertical block (4); the three guide surface left inclined blocks (2) have a left guide plane (18), a left first guide inclined surface (19), and a left second guide inclined surface (20); the three guide surfaces The right oblique insert (3) has a right guide plane (21), a right first guide slope (22) and a right second guide slope (23). The left guide plane (18) is slidably mounted on the left horizontal guide plane (7). The left first guide slope (19) is slidably mounted on the left auxiliary lift guide slope (6). The left second guide slope (20) is slidably mounted on the left main lift guide slope (5). The right guide plane (21) is slidably mounted on the right horizontal guide plane (8). The right first guide slope (22) is slidably mounted on the auxiliary lifting guide slope (9), and the right second guide slope (23) is slidably mounted on the right main lifting guide slope (10). The inclined block push arm (11) pushes the left inclined block (2) and the right inclined block (3) of the three guide surfaces to move horizontally. The vertical top block push rod (12) pushes the vertical top block (1) of the six guide surfaces to move vertically. The left auxiliary lifting guide slope (6) has a left auxiliary lifting guide slope angle (30). The angle (30) of the surface is in the range of 5°-10°. The left main lift guide slope (5) has a left main lift guide slope angle (31), which is in the range of 30°-60°. The right auxiliary lift guide slope (9) has a right auxiliary lift guide slope angle (32), which is in the range of 5°-10°. The right main lift guide slope (10) has a right main lift guide slope angle (33), which is in the range of 30°-60°.

2. The liquefied natural gas stainless steel corrugated plate nodule stamping insert mold structure according to claim 1, characterized in that... The length (24) of the top block horizontal guide surface of the left horizontal guide plane (7) and the right horizontal guide plane (8) ranges from 5mm to 20mm. The length (25) of the top block auxiliary lift guide surface of the left auxiliary lift guide slope (6) and the right auxiliary lift guide slope (9) ranges from 5mm to 16mm. The length (26) of the top block main lift guide surface of the left main lift guide slope (5) and the right main lift guide slope (10) ranges from 6mm to 30mm.

3. The liquefied natural gas stainless steel corrugated plate nodule stamping insert mold structure according to claim 1, characterized in that... The horizontal length dimension (27) of the inclined insert guide surface of the left guide plane (18) and the right guide plane (21) ranges from 3mm to 8mm. The length dimension (28) of the inclined insert auxiliary lifting guide surface of the left first guide slope (19) and the right first guide slope (22) ranges from 3mm to 12mm. The length dimension (29) of the inclined insert main lifting guide surface of the left second guide slope (20) and the right second guide slope (23) ranges from 3mm to 13mm.

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