A method for manufacturing an air cannon nozzle opening fixture

Abstract

The application relates to a manufacturing method of an air cannon connecting pipe opening tool, which comprises the following steps: S1: manufacturing a structure piece according to a hopper inclined plate of a cargo compartment; the structure piece is a 1:1 model of the hopper inclined plate; S2: penetrating a ball flat steel with the air cannon connecting pipe, and drawing a first theoretical hole shape line on the ball flat steel; S3: opening the ball flat steel; S4: penetrating the hopper inclined plate with the air cannon connecting pipe, drawing a second theoretical hole shape line on the hopper inclined plate, and drawing a normal projection center line; S5: opening the hopper inclined plate; S6: installing the air cannon connecting pipe and positioning; S7: checking the installation position of the air cannon connecting pipe; S8: cutting the air cannon connecting pipe along the contact intersection surface of the air cannon connecting pipe and the structure piece and the contact intersection surface of the air cannon connecting pipe and the ball flat steel, and manufacturing the opening tool. Compared with the prior art, the opening tool is used, the opening is accurate and high in quality.

Description

Technical Field

[0001] This invention relates to the field of air cannon nozzles for ships, and more particularly to a method for manufacturing a tooling for opening holes in air cannon nozzles. Background Technology

[0002] On ships, air cannon nozzles need to pass through both cargo hold ramps and bulb flats, and the air cannon nozzles have spatial angles in multiple directions, making their installation quite difficult. In addition, the AM software used has limitations and cannot provide the necessary opening data for on-site air cannon nozzle installation.

[0003] In the existing technology, when the pre-assembly station is constructed according to the HOPA / PB / PC structural sheet body of the hull, and the construction is not normally arranged, the hull flat steel in the longitudinal area from the bow to the midship is arranged horizontally and regularly, while the hull flat steel in the longitudinal area from the midship to the stern is not arranged horizontally and directly, but is arranged at a 20° angle upward from the horizontal plane, and the hopper wall plate is made of wear-resistant steel material.

[0004] The air cannon nozzle on the inclined plate of the transfer hopper must pass through the aforementioned horizontal or non-horizontal spherical flat steel structure, and ensure that the bent air cannon nozzle forms a 25° angle with the wall plate with a 25° angle and then turns 12°. After that, lines are drawn and irregular pipe holes are opened. This step relies entirely on the worker's experience and requires repeated comparisons and trials.

[0005] Against this backdrop, the process of drilling and measuring coordinates for the air cannon nozzle is challenging, time-consuming, and prone to rework and waste. During construction, the theoretical hole shape line of irregular holes at multiple angles is difficult to locate accurately, and the angle between the air cannon nozzle and the wall panel, as well as the spatial coordinates of the air cannon nozzle flange, cannot be measured. Drawing the theoretical hole shape line is difficult, requiring multiple dimensional measurements, repeated hole adjustments, and trial installations of the air cannon nozzle. Therefore, improvements are needed. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a method for manufacturing a high-precision and high-quality air gun nozzle opening tool.

[0007] The technical solution adopted by this invention to solve the above-mentioned technical problem is: a method for manufacturing an air cannon nozzle opening tool, characterized in that it includes the following steps:

[0008] S1: Fabricate a structural sheet based on the hopper ramp of the cargo hold; the structural sheet is a 1:1 model of the hopper ramp;

[0009] S2: Use an air cannon nozzle to pierce the ball flat steel and draw a first theoretical hole shape line on the ball flat steel;

[0010] S3: Opening hole for flat steel;

[0011] S4: Use an air cannon nozzle to pierce the inclined plate of the hopper, and draw a second theoretical hole shape line on the inclined plate of the hopper, and draw the center line of the orthographic projection;

[0012] S5: Opening a hole in the inclined plate of the hopper;

[0013] S6: Install and position the air cannon connector;

[0014] S7: Inspect the installation position of the air cannon connector;

[0015] S8: Cut the air gun nozzle along the contact surface between the air gun nozzle and the structural plate, and along the contact surface between the air gun nozzle and the ball flat steel to obtain the opening tooling.

[0016] In step S1, the structural piece can simulate only the part of the hopper ramp where the air cannon nozzle is installed. Generally, for higher simulation accuracy, the structural piece is a 1:1 model of the hopper ramp with a radius of 1m centered on the air cannon nozzle.

[0017] Preferably, the first theoretical hole shape line in step S2 is drawn as follows: First, within 200mm of the end of the spherical flat steel, draw the vertical initial major diameter line and the horizontal initial minor diameter line of the elliptical hole. Then, rotate the initial major diameter line and the initial minor diameter line around the center of the elliptical hole towards the stern or bow by 12°, draw the major diameter line and the minor diameter line again, and erase the initial major diameter line and the initial minor diameter line. Then, draw points ABCDEF according to the theoretical layout dimensions. Finally, draw an arc connecting point ABCDE to obtain the first theoretical hole shape line.

[0018] Preferably, the theoretical layout dimensions are as follows: point A and point B are on the same straight line as the major diameter, and AB = 165 mm; point C and point D are on the same straight line as the minor diameter, and CD = 233 mm; EF passes through point B and is parallel to the minor diameter, and EF = 220 mm.

[0019] Preferably, step S4, drawing the second theoretical hole shape line, is as follows: draw a vertical line passing through point E on the hopper inclined plate, translate the vertical line 10mm to the left or right, draw the center point O of the elliptical hole on the vertical line, and draw the horizontal initial minor diameter line and the vertical initial major diameter line of the elliptical hole. Then rotate the initial minor diameter line and the initial major diameter line 12° with point O as the center towards the stern or bow of the ship to obtain the major diameter line and the minor diameter line of the elliptical hole, and erase the initial major diameter line and the initial minor diameter line. Then, draw points GHIJ and the orthographic projection center line according to the second theoretical layout dimensions. Finally, draw the connection points ABCD of the elliptical hole to obtain the second theoretical hole shape line.

[0020] Preferably, the second theoretical layout dimensions are such that points G, H, and the major diameter are on the same straight line, and GH = 270 mm; points I, J, and the minor diameter are on the same straight line, and IJ = 114 mm.

[0021] Preferably, if the distance between the stern and the air cannon nozzle is greater than the distance between the bow and the air cannon nozzle, the initial minor axis and the initial major axis are rotated 12° toward the bow; if the distance between the stern and the air cannon nozzle is less than the distance between the bow and the air cannon nozzle, the initial minor axis and the initial major axis are rotated 12° toward the stern.

[0022] Preferably, when the initial minor diameter and the initial major diameter are rotated 12° toward the bow, the vertical line in step S4 is shifted 10mm to the right; when the initial minor diameter and the initial major diameter are rotated 12° toward the stern, the vertical line in step S4 is shifted 10mm to the left.

[0023] Preferably, the orthographic projection centerline of step S4 is formed by extending the major diameter of the elliptical hole by 200-300 mm.

[0024] Preferably, the inspection in step S7 is as follows: when the bulb flat steel is horizontal, the two short sides of two isosceles triangles with an angle of 25° are aligned, attached, and fixed to the air cannon nozzle and the center line of the orthographic projection, respectively; when the bulb flat steel is not horizontal, a triangle template with an angle of 92° is aligned, attached, and fixed to the air cannon nozzle and the center line of the orthographic projection.

[0025] Preferably, the method for manufacturing the air cannon nozzle perforation fixture further includes: using the aforementioned perforation fixture, marking the highest and lowest points of the hole at the hopper inclined plate where the air cannon nozzle passes through; then, placing the aforementioned perforation fixture above the highest and lowest points and fitting it against the hopper inclined plate; and drawing lines along the edge of the perforation fixture to obtain the hole profile line to be perforated. The hole is then perforated on the structural surface of the hopper inclined plate in the cargo hold, where the flat steel is located.

[0026] Compared with the prior art, the advantages of the present invention are: by drawing the first theoretical hole shape line and the second theoretical hole shape line, the opening of the air gun pipe of the transfer barge is accurate and of high quality, and there is no need for multiple hole repairs; by using a structural piece that is 1:1 replicated with the hopper inclined plate for pre-assembly, a hole-opening tooling is made, and then the hole-opening tooling is used to open a hole on the structural surface of the hopper inclined plate with the ball flat steel, making the hole opening more accurate. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the first theoretical aperture line, which is rotated towards the stern according to an embodiment of the present invention, using the initial minor diameter line and the initial major diameter line.

[0028] Figure 2 This is a schematic diagram of the first theoretical aperture shape line, which is rotated toward the bow of the ship according to an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the second theoretical aperture shape line with the vertical line shifted to the left in an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the first theoretical aperture shape line where the vertical line moves to the right according to an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of the orthographic projection centerline of the vertical line shifted to the left in an embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of the orthographic projection centerline of the vertical line shifted to the right in an embodiment of the present invention;

[0033] Figure 7 This is a cross-sectional view of the air cannon nozzle and the ball-piercing flat steel according to an embodiment of the present invention;

[0034] Figure 8 This is a cross-sectional view of the air gun nozzle through-hole structure sheet according to an embodiment of the present invention;

[0035] Figure 9 This is a schematic diagram of the opening of the bulb flat steel rotating towards the stern according to an embodiment of the present invention, showing the initial minor diameter and initial major diameter of the bulb flat steel.

[0036] Figure 10 This is a schematic diagram of the opening of the spherical flat steel with the initial minor diameter and initial major diameter rotating toward the bow, according to an embodiment of the present invention.

[0037] Figure 11 This is a schematic diagram of the opening of the structural sheet body rotating towards the stern according to an embodiment of the present invention, showing the initial minor diameter and initial major diameter.

[0038] Figure 12 This is a schematic diagram of the opening of the structural sheet body rotating towards the bow according to an embodiment of the present invention, showing the initial minor diameter and initial major diameter. Detailed Implementation

[0039] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0040] like Figure 1-12 As shown in the preferred embodiment of the present invention, the method for manufacturing the air cannon nozzle opening fixture includes the following steps:

[0041] S1: Create a structural plate based on the hopper ramp of the cargo hold; the structural plate is a 1:1 model of the hopper ramp; the structural plate can simulate only the part of the hopper ramp where the air cannon nozzle is installed.

[0042] S2: As Figure 4 As shown, an air cannon nozzle is used to pierce the flat steel ball; as Figure 6As shown, within 200mm of the end of the bulb flat steel, draw the initial vertical major diameter line and the initial horizontal minor diameter line of the elliptical hole. If the distance between the stern and the air gun nozzle is greater than the distance between the bow and the air gun nozzle, rotate the initial minor diameter line and the initial major diameter line 12° towards the bow; if the distance between the stern and the air gun nozzle is less than the distance between the bow and the air gun nozzle, rotate the initial minor diameter line and the initial major diameter line 12° towards the stern. Then, draw the major diameter line and the minor diameter line again, and erase the initial major diameter line and the initial minor diameter line. Then, according to the theoretical layout dimensions, draw points A, B, C, D, E, and F respectively. Finally, draw an arc connecting points A, B, C, E, and F to obtain the first theoretical hole shape line. The theoretical layout dimensions are: points A and B are on the same straight line as the major diameter line, AB = 165mm; points C and D are on the same straight line as the minor diameter line, CD = 233mm; EF passes through point B and is parallel to the minor diameter line, EF = 220mm.

[0043] S3: Cut the bulb flat steel according to the first theoretical hole shape line to make a hole in the bulb flat steel;

[0044] S4: Use an air cannon nozzle to penetrate the structural sheet; such as Figure 7 As shown, draw a vertical line passing through point E on the structural plate. When the initial minor axis and initial major axis are rotated 12° towards the bow, the vertical line is shifted 10mm to the right; when the initial minor axis and initial major axis are rotated 12° towards the stern, the vertical line is shifted 10mm to the left. Draw the center point O of the elliptical hole on the vertical line, as well as the horizontal initial minor axis and vertical initial major axis of the elliptical hole. If the distance between the stern and the air gun nozzle is greater than the distance between the bow and the air gun nozzle, the initial minor axis and initial major axis are rotated 12° towards the bow; if the distance between the stern and the air gun nozzle is less than the distance between the bow and the air gun nozzle... Then, rotate the initial minor axis and initial major axis 12° towards the stern to obtain the major axis and minor axis of the elliptical hole, and erase the initial major axis and initial minor axis. Then, according to the second theoretical lofting dimensions, draw points G, H, I, J and the orthographic projection centerline respectively. Finally, draw the elliptical hole connecting points G, H, I and J to obtain the second theoretical hole shape line, and draw the orthographic projection centerline. Points G, H and the major axis are on the same straight line, GH = 270mm; points I, J and the minor axis are on the same straight line, IJ = 114mm; the orthographic projection centerline is formed by extending the major axis of the elliptical hole by 200-300mm.

[0045] S5: Cut holes in the structural sheet according to the second theoretical hole shape line cutting method;

[0046] S6: Install and position the air cannon connector;

[0047] S7: For horizontal bulb flat steel, align and fix the two short sides of an isosceles triangle with an acute angle of 25° to the air cannon nozzle and the center line of the orthographic projection, respectively; for non-horizontal bulb flat steel, align and fix a 92° triangle template to the air cannon nozzle and the center line of the orthographic projection, to verify the accuracy of the air cannon nozzle position.

[0048] S8: Use measuring equipment (such as a total station) to detect the coordinates of the air cannon nozzle, and then compare them with the theoretical coordinates. After confirming that they are accurate, cut the air cannon nozzle along the contact intersection surface between the air cannon nozzle and the structural plate, as well as the contact intersection surface between the air cannon nozzle and the ball flat steel to make the opening tooling.

[0049] S9: According to the hole-making fixture, mark the highest and lowest points of the hole where the air cannon pipe passes through the inclined plate of the hopper. Then, move the hole-making fixture to the highest and lowest points and make the hole-making fixture fit with the inclined plate of the hopper. Draw a line along the edge of the hole-making fixture to obtain the hole shape line to be made. Make the hole on the structural surface of the inclined plate of the hopper with the ball flat steel.

Claims

1. A method for making an air cannon adapter opening tool, the method comprising: The method comprises the following steps: ​ S1: fabricating a structure piece according to the hopper chute plate; the structure piece is a 1:1 model of the hopper chute plate; S2: penetrating the ball flat steel with the air cannon connector and drawing a first theoretical hole shape line on the ball flat steel; the first theoretical hole shape line is drawn as follows: on the ball flat steel within 200 mm from the connection between the air cannon and the ball flat steel, drawing the vertical initial major diameter line and the horizontal initial minor diameter line of the elliptical hole, then rotating the initial major diameter line and the initial minor diameter line around the center of the elliptical hole by 12° toward the stern or the bow, drawing the major diameter line and the minor diameter line again, erasing the initial major diameter line and the initial minor diameter line, then drawing A point, B point, C point, D point, E point and F point according to the theoretical lofting size, and finally drawing an arc connecting line connecting A point, B point, C point, D point and E point to obtain the first theoretical hole shape line; if the distance from the stern to the air cannon connector is greater than the distance from the bow to the air cannon connector, the initial minor diameter line and the initial major diameter line are rotated by 12° toward the bow; if the distance from the stern to the air cannon connector is less than the distance from the bow to the air cannon connector, the initial minor diameter line and the initial major diameter line are rotated by 12° toward the stern; S3: opening holes in the ball flat steel; S4: penetrating the structure piece with the air cannon connector, drawing a second theoretical hole shape line on the structure piece, and drawing a normal projection center line; the second theoretical hole shape line is drawn as follows: drawing a vertical line passing through E point on the structure piece, shifting the vertical line by 10 mm to the left or to the right, drawing the center O of the elliptical hole on the vertical line, and drawing the horizontal initial minor diameter line and the vertical initial major diameter line of the elliptical hole, then rotating the initial minor diameter line and the initial major diameter line around the center O by 12° toward the stern or the bow to obtain the major diameter line and the minor diameter line of the elliptical hole, and erasing the initial major diameter line and the initial minor diameter line, then drawing G point, H point, I point, J point and the normal projection center line according to the second theoretical lofting size, and finally drawing an elliptical hole connecting G point, H point, I point and J point to obtain the second theoretical hole shape line; S5: opening holes in the structure piece; S6: installing the air cannon connector and positioning; S7: checking the installation position of the air cannon connector; S8: cutting the air cannon connector along the contact intersection surface between the air cannon connector and the structure piece, and the contact intersection surface between the air cannon connector and the ball flat steel to obtain an opening tool.

2. The fabrication method of the air cannon connector opening tool according to claim 1, characterized in that: the theoretical lofting size is that A point and B point are on the same straight line, AB=165 mm; C point, D point and the minor diameter line are on the same straight line, CD=233 mm; EF line passes through B point and is parallel to the minor diameter line, EF=220 mm.

3. The method of claim 1, wherein: the second theoretical lofting size is that G point, H point and the major diameter line are on the same straight line, GH=270 mm; I point, J point and the minor diameter line are on the same straight line, IJ=114 mm.

4. The method of claim 1, wherein: when the initial minor diameter line and the initial major diameter line are rotated by 12° toward the bow, the vertical line is shifted by 10 mm to the right in step S4; when the initial minor diameter line and the initial major diameter line are rotated by 12° toward the stern, the vertical line is shifted by 10 mm to the left in step S4.

5. The method of claim 3, wherein: The normal projection center line of the step S4 is formed by extending the long diameter line of the elliptical hole by 200-300 mm.

6. The method of claim 1, wherein: The inspection of the step S7 is that when the ball flat steel is horizontal, two short sides of an isosceles triangle plate with an acute angle of 25° are respectively positioned and fixed with the air cannon connecting pipe and the normal projection center line; when the ball flat steel is not horizontal, a triangle sample plate with an angle of 92° is positioned and fixed with the air cannon connecting pipe and the normal projection center line.

7. The method of claim 1, wherein: The method for manufacturing the air cannon connecting pipe opening tool further comprises the following steps: drawing the highest point and the lowest point of the hole at the chute inclined plate of the air cannon connecting pipe by the opening tool, then placing the opening tool on the highest point and the lowest point, and making the opening tool adhere to the chute inclined plate to draw a line along the edge of the opening tool to obtain a hole type line, and opening a hole on the structure surface of the chute inclined plate of the cargo compartment where the ball flat steel is located.

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