A method for positioning the machining position of a tip casting blank of a power transmission and transformation tower

Abstract

The invention relates to a method for positioning the processing position of a transmission and transformation tower tip casting blank, comprising the following steps: step 1, inserting a straight steel plate into an opening at a small head end of the transmission and transformation tower tip casting blank, and then lifting up both ends of the straight steel plate by using a first jack and a second jack, so as to achieve the purpose of placing the transmission and transformation tower tip casting blank on a marking platform; the center point in the height direction of one side of the opening is defined as point A, the center point in the height direction of the other side of the opening is defined as point B, and the center point of the end face of the horn end of the transmission and transformation tower tip casting blank is defined as point C, and the distances from point A, point B and point C to a reference plane of the marking platform are made equal by adjusting the first jack and the second jack; step 2, drawing a reference line L1 on the back of the transmission and transformation tower tip casting blank based on a line connecting point B and point C in space; the invention is beneficial in that it can position the processing position of the transmission and transformation tower tip casting blank.

Description

Technical Field

[0001] The invention relates to a method for locating the machining position of a tip casting blank of a power transmission and transformation iron tower. Background Art

[0002] The tower tip primarily connects the steel tube frame to the tower structure. One end of the tower tip is larger and trumpet-shaped, permanently welded to the seamless steel tube of the tower body. The other end tapers to a narrower end, which features a notch and a through-hole. A pin passes through the through-hole through the narrow end, creating a hinged connection to the tower structure. The tower tip's overall structure resembles a pipe.

[0003] The tip of a transmission tower is a tapered, thin-walled structure with uneven wall thickness. This is a special-shaped structure, typically produced by casting. This blank is then machined to create the trumpet-shaped end and the through-hole at the small end.

[0004] For the processing of blanks, fitters are required to mark the positions to be processed so as to locate the processing positions and ensure the processing accuracy. Summary of the Invention

[0005] The object of the present invention is to provide a method for machining and positioning a tip casting blank of a power transmission and transformation tower, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A method for locating the machining position of a tip casting blank of a power transmission and transformation tower comprises the following steps:

[0008] Step 1: insert a straight steel plate into the crotch of the small head end of the transmission and transformation tower tip casting blank, and then use the first jack and the second jack to jack up the two ends of the straight steel plate, so that the transmission and transformation tower tip casting blank can be placed on the marking platform; the center point of the height direction of one side of the crotch is defined as point A, the center point of the height direction of the other side of the crotch is defined as point B, and the end face center of the horn end of the transmission and transformation tower tip casting blank is defined as point C, and the distances from point A, point B and point C to the reference plane of the marking platform are equal by adjusting the first jack and the second jack;

[0009] Step 2: Based on the line connecting point B and point C in space, a reference line L1 can be drawn on the back of the transmission tower tip casting blank;

[0010] Step 3: Use the third, fourth, and fifth jacks to support the end face of the speaker end in a three-point support manner, and use another sixth jack to support the small end, so as to keep the end face of the speaker end facing downward and place the transmission and transformation tower tip casting blank upright on the marking platform; wherein, the fifth jack is aligned with the reference line L1 and the fifth jack is located on the side of the speaker end away from the small end; the third and fourth jacks are located on both sides of the fifth jack;

[0011] Step 4: Take two different points on the reference line L1, defined as points E and F. Place a square ruler on the marking platform near the small end, with one of the right-angled sides of the square ruler set vertically. Adjust the third and fourth jacks so that the distances from points E and F to the vertically set right-angled side of the square ruler are the same, thereby achieving leveling of the left and right sides of the small end.

[0012] Step 5. Take two different points on the reference line L1, defined as points J and K, and measure the vertical heights from points J and K to the marking platform to obtain the current actual height difference H between points J and K. Adjust the fifth jack and the sixth jack so that the current actual height difference H between points J and K is equal to the theoretical height difference △H between points J and K obtained based on the drawing. At this time, the front and rear sides of the small head are leveled. When the left and right sides and the front and rear sides of the small head are leveled, the machining allowance P of the horn end and the position of the center point R of the countersunk hole of the small head can be determined.

[0013] As a further solution of the present invention: in step one, an inclined wedge washer is placed on the marking platform, and the inclined wedge washer abuts against the outer wall surface of the speaker end to achieve positioning of the speaker end.

[0014] As a further solution of the present invention: in step three, an auxiliary support member is provided, and the sixth jack supports the small head end through the auxiliary support member.

[0015] As a further solution of the present invention: the auxiliary support member includes: a strip iron block and two branches; the two branches are welded and fixed to the strip iron block; the strip iron block is inserted into the crotch of the small head end; and the two branches support the small head end.

[0016] As a further solution of the present invention: the strip iron block is welded to the top rod of the sixth jack.

[0017] As a further solution of the present invention: the sixth jack is placed on the marking platform through a square box.

[0018] As a further solution of the present invention: a positioning iron block for limiting the position of the sixth jack is welded to the square box; the positioning iron block abuts against the main body of the sixth jack.

[0019] As a further solution of the present invention: the positioning iron block is fixed to the top of the square box by spot welding.

[0020] As a further solution of the present invention: the third jack, the fourth jack and the fifth jack are all pointed cone jacks.

[0021] As a further solution of the present invention: the first jack, the second jack, the sixth jack, the third jack, the fourth jack and the fifth jack are all hydraulic jacks.

[0022] The beneficial effect of this embodiment is that the processing position of the tip casting blank of the power transmission and transformation tower can be located. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a flow chart of a method for locating the machining position of a tip casting blank of a power transmission and transformation tower according to the present invention;

[0024] Figure 2 It is a schematic diagram of adjusting the position of the transmission and transformation tower tip casting blank by the first jack and the second jack in step 1 of a method for machining the transmission and transformation tower tip casting blank of the present invention;

[0025] Figure 3 It is a schematic diagram of leveling the left and right sides of the small end in step 4 of a method for machining a transmission and transformation tower tip casting blank of the present invention;

[0026] Figure 4 This is a schematic diagram of leveling the front and rear sides of the small end in step five of a method for machining a transmission and transformation tower tip casting blank of the present invention;

[0027] Figure 5 The present invention is a schematic diagram of a transmission and transformation tower tip formed by machining a transmission and transformation tower tip casting blank.

[0028] List of attached figures: transmission and transformation tower tip casting blank 100, marking platform 200, first jack 101, second jack 102, third jack 103, fourth jack 104, fifth jack 105, sixth jack 106, right-angle ruler 201, straight steel plate 202, inclined wedge washer 203. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] See also Figures 1 to 5In the embodiment of the present invention, one end of the transmission tower tip casting blank 100 is bent into a trumpet shape, which can also be called a trumpet end. After the excess part of this end is cut off, it is permanently connected to the seamless steel pipe of the tower body by welding. The other end gradually shrinks, which is also called the small head end. The small head end is provided with an opening, which is hinged to the tower structure through clearance fit. When processing the small head end, it is necessary to determine the position of the turning hole, and when processing the trumpet end, it is necessary to determine the processing range. Therefore, it is necessary to locate the processing position on the transmission tower tip casting blank 100.

[0031] A method for machining and positioning a tip casting blank 100 of a power transmission and transformation tower comprises the following steps:

[0032] Step 1: Insert the straight steel plate 202 into the crotch of the small end of the transmission tower tip casting blank 100, and then use the first jack 101 and the second jack 102 to lift the two ends of the straight steel plate 202, so that the transmission tower tip casting blank 100 can be placed on the marking platform 200;

[0033] The center point of the height direction of one side of the crotch is defined as point A, the center point of the height direction of the other side of the crotch is defined as point B, and the end face center of the horn end of the transmission and transformation tower tip casting blank 100 is defined as point C. By adjusting the first jack 101 and the second jack 102, the distances from point A, point B and point C to the reference plane of the marking platform 200 are equal;

[0034] Step 2: Based on the line connecting point B and point C in space, a reference line L1 can be drawn on the back of the transmission tower tip casting blank 100;

[0035] Step 3: Use the third jack 103, the fourth jack 104, and the fifth jack 105 to support the end face of the speaker end in a three-point support manner, and use another sixth jack 106 to support the small end, so as to keep the end face of the speaker end facing downward and place the transmission and transformation tower tip casting blank 100 vertically on the marking platform 200; wherein, the fifth jack 105 is aligned with the reference line L1 and the fifth jack 105 is located on the side of the speaker end away from the small end; the third jack 103 and the fourth jack 104 are located on both sides of the fifth jack 105;

[0036] Step 4: Select two different points on the reference line L1, defined as points E and F, and place the square 201 on the marking platform 200 near the small end, with one of the right-angled sides of the square 201 set vertically. Adjust the third jack 103 and the fourth jack 104 so that the distances from points E and F to the vertically set right-angled side of the square 201 are the same, thereby achieving leveling of the left and right sides of the small end.

[0037] Step five, take two different points on the reference line L1, define them as points J and K, measure the vertical heights from points J and K to the marking platform 200, and obtain the current actual height difference H between points J and K; by adjusting the fifth jack 105 and the sixth jack 106, make the current actual height difference H between points J and K equal to the theoretical height difference △H between points J and K obtained based on the drawing, and now the front and rear sides of the small head end are leveled; when the left and right sides and the front and rear sides of the small head end are leveled, the machining allowance P of the horn end and the position of the center point R of the countersunk hole of the small head end can be determined.

[0038] In step 1, points A, B, and C are all points in space and are not attached to the transmission tower tip casting blank 100. Points A, B, and C are not shown in the figure. Points A, B, and C can define a plane. By adjusting the first jack 101 and the second jack 102, the position of the plane can be adjusted. When the distances from points A, B, and C to the reference plane of the marking platform 200 are equal, the plane defined by points A, B, and C is parallel to the reference plane of the marking platform 200. The reference line L1 is the intersection of the plane defined by points A, B, and C and the outer surface of the transmission tower tip casting blank 100. The reference line L1 can be drawn along the outer surface of the transmission tower tip casting blank 100 using a fixed height method.

[0039] As a specific embodiment, in step 1, a wedge washer 203 is placed on the marking platform 200. The wedge washer 203 abuts the outer wall surface of the horn end to achieve positioning of the horn end. The straight steel plate 202 and the wedge washer 203 position the two ends of the transmission tower tip casting blank 100.

[0040] As a specific embodiment, in step three, auxiliary support member 204 is provided, and the sixth jack 106 supports the small end through auxiliary support member 204. Specifically, auxiliary support member 204 comprises a strip of iron and two branches; the two branches are welded and fixed to the strip of iron; the strip of iron is inserted into the crotch of the small end; the two branches support the small end. As a specific embodiment, the strip of iron is welded to the top rod of the sixth jack 106.

[0041] As a specific embodiment, the sixth jack 106 is placed on the marking platform 200 through a square box. The height of the sixth jack 106 can be raised by the square box. The sixth jack 106 supports the small end. The square box is welded with a positioning iron block for limiting the position of the sixth jack 106; specifically, the positioning iron block is fixed to the top of the square box by spot welding. The spot welding method is used to facilitate subsequent dismantling and continued use. The positioning iron block abuts against the main body of the sixth jack 106. The structure of the transmission tower tip casting blank 100 causes the small end to generate a component force on the sixth jack 106 forward. The provision of the positioning iron block can offset this component force and prevent the sixth jack 106 from moving relative to the square box.

[0042] As a specific embodiment, the third jack 103, the fourth jack 104 and the fifth jack 105 are all pointed cone jacks. The first jack 101, the second jack 102, the sixth jack 106, the third jack 103, the fourth jack 104 and the fifth jack 105 are all hydraulic jacks.

[0043] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0044] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A method for positioning the machining position of a tip casting blank of a power transmission and transformation tower, characterized in that: The following steps are involved: Step 1: insert a straight steel plate into the crotch of the small head end of the transmission and transformation tower tip casting blank, and then use the first jack and the second jack to lift the two ends of the straight steel plate, so that the transmission and transformation tower tip casting blank can be placed on the marking platform; the center point of the height direction of one side of the crotch is defined as point A, the center point of the height direction of the other side of the crotch is defined as point B, and the end face center of the horn end of the transmission and transformation tower tip casting blank is defined as point C, and the distances from point A, point B and point C to the reference plane of the marking platform are equal by adjusting the first jack and the second jack; Step 2: Based on the line connecting point B and point C in space, a reference line L1 can be drawn on the back of the transmission tower tip casting blank; Step 3: Using a third jack, a fourth jack, and a fifth jack to support the end face of the horn end in a three-point support manner, while supporting the small end end by another sixth jack, thereby keeping the end face of the horn end downward and placing the transmission and transformation tower tip casting blank upright on the marking platform; wherein the fifth jack is aligned with the reference line L1 and the fifth jack is located on the side of the horn end away from the small end end; the third jack and the fourth jack are located on both sides of the fifth jack; Step 4: Take two different points on the reference line L1, defined as points E and F, and place a square ruler on the marking platform close to the small end, with one right-angled side of the square ruler vertically set; by adjusting the third jack and the fourth jack, make the distances between points E and F and the vertically set right-angled side of the square ruler equal, thereby achieving leveling of the left and right sides of the small end; Step five, take two different points on the reference line L1, define them as points J and K, measure the vertical heights from points J and K to the marking platform, and obtain the current actual height difference H between points J and K; by adjusting the fifth jack and the sixth jack, make the current actual height difference H between points J and K equal to the theoretical height difference △H between points J and K obtained based on the drawing, and now the front and rear sides of the small head end are leveled; when the left and right sides and the front and rear sides of the small head end are leveled, the machining allowance P of the horn end and the position of the center point R of the countersunk hole of the small head end can be determined.

2. The method for positioning the machining position of a transmission and transformation tower tip casting blank according to claim 1, characterized in that: In step 1, an inclined wedge washer is placed on the scribing platform, and the inclined wedge washer abuts against the outer wall surface of the horn end to achieve positioning of the horn end.

3. The method for positioning the machining position of a transmission and transformation tower tip casting blank according to claim 1, characterized in that: In step three, an auxiliary support member is provided, and the sixth jack supports the small head end through the auxiliary support member.

4. The method for positioning the machining position of a transmission and transformation tower tip casting blank according to claim 3, characterized in that: The auxiliary support member includes: a strip iron block and two branches; the two branches are welded and fixed to the strip iron block; the strip iron block is inserted into the crotch of the small head end; and the two branches support the small head end.

5. The method for machining and positioning a tip casting blank of a power transmission and transformation tower according to claim 4, characterized in that: The strip iron block is welded to the top rod of the sixth jack.

6. The method for machining and positioning a tip casting blank of a power transmission and transformation tower according to claim 5, characterized in that: The sixth jack is placed on the marking platform through a square box.

7. The method for machining and positioning a tip casting blank of a power transmission and transformation tower according to claim 6, characterized in that: A positioning iron block for limiting the position of the sixth jack is welded to the square box; the positioning iron block abuts against the main body of the sixth jack.

8. The method for machining and positioning a tip casting blank of a power transmission and transformation tower according to claim 7, characterized in that: The positioning iron block is fixed to the top of the square box by spot welding.

9. The method for machining and positioning a tip casting blank of a power transmission and transformation tower according to claim 1, characterized in that: The third jack, the fourth jack and the fifth jack are all pointed cone jacks.

10. The method for machining and positioning a tip casting blank of a power transmission and transformation tower according to claim 1, characterized in that: The first jack, the second jack, the sixth jack, the third jack, the fourth jack and the fifth jack are all hydraulic jacks.

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