Synchronous adjusting mechanism for stainless steel corrugated plate forming die of liquefied natural gas storage tank

Abstract

The invention provides a synchronous adjusting mechanism for a stainless steel corrugated plate forming die of a liquefied natural gas storage tank, and belongs to the field of stainless steel sheet guide forming die systems. Comprising a first rack (1), a phase adjustable gear (2), an adjusting support block (3), a fixing screw (4), a first adjusting screw (5), a second adjusting screw (5-1), a phase fixing gear (7), a multifunctional gear shaft (6) and a second rack (8). The second rack 8 is connected with the right half part 12 of the small corrugation forming die and then moves synchronously, after the phase adjustable gear 2 is installed and adjusted, the phase relation of small corrugation forming through the left half part 10 of the small corrugation forming die and the right half part 12 of the small corrugation forming die can be accurately guaranteed, and mechanical transmission has the characteristic of rigidity. The problem of insufficient precision caused by a hydraulic servo system is solved, and the quality of small ripples is improved.

Description

Technical Field

[0001] The invention belongs to the category of a stainless steel sheet guiding forming die system, is a synchronous adjustment mechanism of a forming die, and specifically relates to a synchronous adjustment mechanism of a stainless steel corrugated plate forming die for a liquefied natural gas storage tank. Background Art

[0002] The requirements for the small corrugation forming mold of the stainless steel corrugated plate for liquefied natural gas storage tanks are very high. Since the large corrugations have been formed, nodules need to be formed at the intersection of the small corrugations and the large corrugations at the same time. The stainless steel corrugated plate is used to store liquefied natural gas. The operating environment temperature is -160℃. The thinning rate of the part material after stamping is less than 1%. There are no scratches and forming marks on the surface of the part after forming. After the stainless steel plate is deformed by the mold, the thickness of the 1.2mm thick precision stainless steel plate at the thinnest point is required to be >1.14mm. The surface of the plate is covered with plastic film during stamping. After stamping, not only is the surface of the stainless steel plate required to be free of scratches and strains, but also The film must be free of damage to meet the requirements. The mold currently used to complete this task is divided into three parts: a punch that moves up and down, a left die that moves left and right, and a right die. The mold movement is mainly controlled by a hydraulic servo system to achieve small corrugation forming. However, in the traditional forming process, there are problems such as thinning rate, scratches, forming marks and local damage to the film. To solve these problems, the movement of the left and right dies is more accurately controlled, and a gear rack mechanism is used to assist the hydraulic servo system to improve the movement accuracy of the left and right dies. A synchronous adjustment mechanism for a liquefied natural gas tank stainless steel corrugated plate forming mold is proposed to improve the quality of small corrugations. Summary of the invention

[0003] The synchronous adjustment mechanism of the stainless steel corrugated plate forming mold of the liquefied natural gas storage tank has the function of accurately adjusting the synchronization accuracy of the left and right molds of the small corrugated forming. It is characterized in that the structure consists of a first rack, a second rack, a phase-adjustable gear, a phase-fixed gear, a special-shaped fixed flat key, an adjustment wedge, and a locking nut. The present invention provides the following technical solutions: the first rack is meshed with the phase-adjustable gear, and the end face of the phase-adjustable gear is installed with an adjustment bracket block, the adjustment bracket block has a wedge block receiving groove, the adjustment bracket block is installed with a fixing screw, a first adjustment screw, and a second adjustment screw. The phase-adjustable gear and the phase-fixed gear are coaxially installed on the multifunctional gear shaft, the phase-fixed gear is meshed with the second rack, the multifunctional gear shaft has a gear phase fixed installation shaft section, a step shaft and a gear phase variable installation shaft section, the gear phase fixed installation shaft section has a gear installation fixed key, the gear phase variable installation shaft section has a special-shaped fixed flat key structure and a guide plane, the first adjustment screw is connected to install the second adjustment wedge, the second adjustment screw is connected to install the first adjustment wedge, and the first adjustment wedge and the second adjustment wedge are inside the wedge receiving groove.

[0004] As an optimization, the first adjusting screw and the second adjusting screw are installed with a locking nut and a tightening nut, the first adjusting screw and the second adjusting screw have a bolt round end and an annular groove, the first adjusting screw and the second adjusting screw are movably connected and installed on the second adjusting wedge and the wedge top T-slot of the first adjusting wedge through the bolt round end and the annular groove, the special-shaped fixed flat key has a first inclined surface and a second inclined surface, the second adjusting wedge has a second adjusting wedge expansion surface, the second adjusting wedge expansion surface is fitted and slidably installed on the second inclined surface, the first adjusting wedge has a first adjusting wedge expansion surface, the first adjusting wedge expansion surface is fitted and slidably installed on the first inclined surface.

[0005] As an optimization, the length range of the special-shaped fixed flat key of the special-shaped fixed flat key is 5mm to 30mm, the bottom width range of the special-shaped fixed flat key of the special-shaped fixed flat key is 4mm to 12mm, and the side angle range of the special-shaped fixed flat key is 3° to 8°.

[0006] As an optimization, the keyway width of the phase-adjustable gear ranges from 6 mm to 16 mm.

[0007] As an optimization, the range of the variable phase angle between the phase-adjustable gear and the gear phase-variable mounting shaft segment is greater than half of the center angle corresponding to one tooth of the phase-adjustable gear.

[0008] Compared with the prior art, the beneficial effects of the present invention are: the present invention achieves a better balance between adjustment convenience and movement reliability through the setting of variable gear phase, so that the relative movement accuracy of the left and right racks is improved, and the forming of higher quality small corrugations is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the synchronous adjustment mechanism of the molding die of the present invention; Figure 2 It is a schematic structural diagram of small corrugations, large corrugations, nodules and a forming mold of a stainless steel plate of the present invention; Figure 3 This is a schematic diagram of the structure of the multifunctional gear shaft of the present invention; Figure 4 This is a schematic diagram of the phase-adjustable gear structure of the present invention; Figure 5 It is a schematic diagram of the structure after the phase-adjustable gear and the multifunctional gear shaft of the present invention are installed; Figure 6 A schematic diagram of adjusting the bracket block and adjusting the wedge block according to the present invention; In the figure: 1-first rack; 2-phase adjustable gear; 3-adjusting bracket block; 4-fixing screw, 5-first adjustment screw; 5-1, second adjustment screw; 6-multi-function gear shaft; 7-phase fixed gear; 8-second rack; 9-corrugated plate; 10-left half of small corrugated forming mold; 11-top block of small corrugated forming mold; 12-right half of small corrugated forming mold; 13-gear phase fixed installation shaft section; 14-step shaft; 15-special-shaped fixed flat key; 16-special-shaped fixed flat key length; 17-flat key side clamp Angle; 18-guide plane; 19-gear phase variable installation shaft section; 20-gear installation fixing key; 21-bottom width of special-shaped fixing flat key; 22-first adjustment wedge; 23-second adjustment wedge; 24-keyway width; 25-locking nut; 26-tightening nut; 27-wedge accommodating groove; 28-second adjustment wedge expansion surface; 29-first adjustment wedge expansion surface; 30-t-slot at top of wedge; 31-bolt round end; 32-annular groove; 33-first inclined surface; 34-second inclined surface; 35-variable phase angle. DETAILED DESCRIPTION

[0010] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0011] like Figure 1-5The synchronous adjustment mechanism of the stainless steel corrugated plate forming die of the liquefied natural gas storage tank is characterized in that: the first rack (1) is meshedly installed with a phase-adjustable gear (2), the end surface of the phase-adjustable gear (2) is installed with an adjustment bracket block (3), the adjustment bracket block (3) has a wedge block receiving groove (27), the adjustment bracket block (3) is installed with a fixing screw (4), a first adjustment screw (5) and a second adjustment screw (5-1), the phase-adjustable gear (2) and the phase-fixed gear (7) are coaxially installed on the multifunctional gear shaft (6), the phase-fixed gear (7) is meshedly installed with a second rack (8), the multifunctional gear shaft (6) has a gear phase-fixed installation shaft section (13), a stepped shaft (14) and a gear phase-variable installation shaft section (19), the gear phase-fixed installation shaft section (13) has a gear installation fixing key (20), the gear phase-variable installation shaft section (19) has a special-shaped fixed flat key (15) structure and a guide plane (18), the first adjustment screw (5) is connected to and installed with the second adjustment wedge block (23), the second adjustment The screw (5-1) is connected to install the first adjusting wedge (22). The first adjusting wedge (22) and the second adjusting wedge (23) are inside the wedge receiving groove (27). The small corrugation of the corrugated plate (9) is formed by the left half (10) of the small corrugation forming mold, the top block (11) of the small corrugation forming mold and the right half (12) of the small corrugation forming mold. When the top block (11) of the small corrugation forming mold moves downward, the left half (10) of the small corrugation forming mold and the right half (12) of the small corrugation forming mold move downward. 12) synchronously move in opposite directions, the first rack (1) is connected to the left half (10) of the small corrugation forming mold and then moves synchronously, and the second rack (8) is connected to the right half (12) of the small corrugation forming mold and then moves synchronously, and the phase-adjustable gear (2) can accurately ensure the phase relationship between the small corrugation forming left half (10) of the small corrugation forming mold and the right half (12) of the small corrugation forming mold after being installed and adjusted, and the use of mechanical transmission has the characteristic of rigidity, which makes up for the lack of precision caused by the hydraulic servo system.

[0012] As an embodiment of the present invention, Figure 6As shown, the first adjusting screw (5) and the second adjusting screw (5-1) are installed with a locking nut (25) and a tightening nut (26), the first adjusting screw (5) and the second adjusting screw (5-1) have a bolt round end (31) and an annular groove (32), the first adjusting screw (5) and the second adjusting screw (5-1) are movably connected and installed on the second adjusting wedge (23) and the wedge top T-slot (30) of the first adjusting wedge (22) through the bolt round end (31) and the annular groove (32), the special-shaped fixing flat key (15) has a first inclined surface (33) and a second inclined surface (34), the second adjusting wedge ( The first adjusting wedge (23) has a second adjusting wedge expansion surface (28), the second adjusting wedge expansion surface (28) is slidably mounted on the second inclined surface (34), the first adjusting wedge (22) has a first adjusting wedge expansion surface (29), the first adjusting wedge expansion surface (29) is slidably mounted on the first inclined surface (33), and during adjustment, the first adjusting screw (5) and the second adjusting screw (5-1) move in opposite directions, that is, when the second adjusting wedge (23) is pushed in, the first adjusting wedge (22) is pushed out, and vice versa, so as to achieve the purpose of variable position between the phase-adjustable gear (2) and the gear phase-variable mounting shaft section (19).

[0013] As an embodiment of the present invention, Figure 3 As shown, the special-shaped fixed flat key length (16) of the special-shaped fixed flat key (15) ranges from 5 mm to 30 mm, the special-shaped fixed flat key bottom width (21) of the special-shaped fixed flat key (15) ranges from 4 mm to 12 mm, and the flat key side angle (17) of the special-shaped fixed flat key (15) ranges from 3° to 8°.

[0014] As an embodiment of the present invention, Figure 5 As shown, the keyway width (24) of the phase-adjustable gear (2) ranges from 6 mm to 16 mm, that is, the width of the keyway width (24) should be able to accommodate the special-shaped fixed flat key (15), the first adjustment wedge (22) and the second adjustment wedge (23) at the same time, so as to achieve the purpose of variable phase of the phase-adjustable gear (2).

[0015] As an embodiment of the present invention, Figure 5As shown, the range of the variable phase angle (35) between the phase-adjustable gear (2) and the gear phase variable mounting shaft section (19) is greater than half of the center angle corresponding to one tooth of the phase-adjustable gear (2). This is because the number of teeth of the gear and the rack is a natural number. When the relative mounting position is adjusted to one tooth, the changing angle is discontinuous. During the specific installation, it is required that the initial positions of the first rack (1) and the second rack (8) relative to each other can be continuously changed and adjusted. Of course, it only needs to be able to be adjusted within the range of the center angle corresponding to half a tooth.

[0016] Working principle: A synchronous adjustment mechanism for a stainless steel corrugated plate forming mold for a liquefied natural gas storage tank. The first rack 1 is connected to the left half 10 of the small corrugated forming mold and then moves synchronously. The second rack 8 is connected to the right half 12 of the small corrugated forming mold and then moves synchronously. After the phase-adjustable gear 2 is installed and adjusted, it can accurately ensure the phase relationship between the left half 10 of the small corrugated forming mold and the right half 12 of the small corrugated forming mold. The use of mechanical transmission has the characteristics of rigidity, which makes up for the lack of precision caused by the hydraulic servo system and improves the quality of the small corrugations.

[0017] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0018] Although the embodiments of the present invention have been shown and described, it is understandable to those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present 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, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. For example: changing the shape of the wedge from a guide plane to a contact surface, changing the shape of the fixed flat key, or changing the connection method between the flat key and the shaft are all within the scope of protection of the present invention.

Claims

1. The synchronous adjustment mechanism of the stainless steel corrugated plate forming mold for liquefied natural gas storage tanks has the function of accurately adjusting the synchronization accuracy of the left and right molds of small corrugated forming, which is characterized by The structure comprises a first rack, a second rack, a phase-adjustable gear, a phase-fixed gear, a special-shaped fixed flat key, an adjustment wedge, and a locking nut; the first rack (1) is meshedly mounted with the phase-adjustable gear (2); the end surface of the phase-adjustable gear (2) is mounted with an adjustment bracket block (3); the adjustment bracket block (3) has a wedge accommodating groove (27); the adjustment bracket block (3) is mounted with a fixing screw (4), a first adjustment screw (5), and a second adjustment screw (5-1); the phase-adjustable gear (2) and the phase-fixed gear (7) are coaxially mounted on a multifunctional gear shaft (6); the phase-fixed gear (7) is meshedly mounted with the second rack (8), the multifunctional gear shaft (6) comprises a gear phase fixed mounting shaft section (13), a stepped shaft (14) and a gear phase variable mounting shaft section (19), the gear phase fixed mounting shaft section (13) comprises a gear mounting fixed key (20), the gear phase variable mounting shaft section (19) comprises a special-shaped fixed flat key (15) structure and a guide plane (18), the first adjusting screw (5) is connected to and mounted with the second adjusting wedge (23), the second adjusting screw (5-1) is connected to and mounted with the first adjusting wedge (22), and the first adjusting wedge (22) and the second adjusting wedge (23) are inside the wedge accommodating groove (27).

2. The synchronous adjustment mechanism of the stainless steel corrugated plate forming die for the liquefied natural gas storage tank according to claim 1 is characterized in that The first adjusting screw (5) and the second adjusting screw (5-1) are installed with a locking nut (25) and a tightening nut (26); the first adjusting screw (5) and the second adjusting screw (5-1) have a bolt round end (31) and an annular groove (32); the first adjusting screw (5) and the second adjusting screw (5-1) are movably connected and installed on the second adjusting wedge block (23) and the first adjusting wedge block (23) through the bolt round end (31) and the annular groove (32). 2) has a T-shaped groove (30) at the top end of the wedge block, the special-shaped fixed flat key (15) has a first inclined surface (33) and a second inclined surface (34), the second adjusting wedge block (23) has a second adjusting wedge block expansion surface (28), the second adjusting wedge block expansion surface (28) is slidably mounted on the second inclined surface (34), and the first adjusting wedge block (22) has a first adjusting wedge block expansion surface (29), the first adjusting wedge block expansion surface (29) is slidably mounted on the first inclined surface (33).

3. The synchronous adjustment mechanism of the stainless steel corrugated plate forming die for the liquefied natural gas storage tank according to claim 1 is characterized in that The special-shaped fixed flat key (15) has a length (16) ranging from 5 mm to 30 mm, a bottom width (21) of the special-shaped fixed flat key (15) ranging from 4 mm to 12 mm, and a flat key side angle (17) of the special-shaped fixed flat key (15) ranging from 3° to 8°.

4. The synchronous adjustment mechanism of the stainless steel plate forming die for the liquefied natural gas tank according to claim 1, characterized in that The keyway width (24) of the phase-adjustable gear (2) ranges from 6 mm to 16 mm.

5. The synchronous adjustment mechanism of the stainless steel corrugated plate forming die for the liquefied natural gas storage tank according to claim 1 is characterized in that The range of the variable phase angle (35) between the phase-adjustable gear (2) and the gear phase-variable mounting shaft section (19) is greater than half of the corresponding center angle of one tooth of the phase-adjustable gear (2).

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