A positioning device for boss-like parts on a cylindrical structure

Abstract

A positioning device for boss-like parts on a cylindrical structure, characterized in that it mainly comprises a main board (1), a connecting rod (2), a positioning board (3) and a pin (4); wherein, the main board (1) is a steel plate with a weight-reducing hole in the middle, and there is a counterbore (11) at each of the four corners of the lower surface of the main board (1). The connecting rod (2) is a narrow and long steel plate in an "L" shape. The end face of the A branch rod (21) of the connecting rod (2) is connected to the left end face of the main board (1), so that the A branch rod (21) of the connecting rod (2) and the main board (1) are in the same plane. The end face of the B branch rod (22) of the connecting rod (2) is welded to the positioning block (3); the end face of the B branch rod (22) forms a set angle with the longitudinal direction of the B branch rod (22). The structure of the present invention is simple and the operation is convenient, solving the positioning problem of boss-like parts on a cylindrical structure and making up for the defects of the prior art.

Description

Technical Field

[0001] The present invention relates to a special positioning device, which is mainly used for positioning 6 types of boss parts on a certain cylindrical structure. Background Art

[0002] There is a certain cylindrical structure with a window on the cylinder, and there are two through holes on the edge of the window; now it is necessary to weld four boss parts to the outside of the cylinder. The four bosses are symmetrically distributed, and the included angle formed by the symmetry line of the distribution of the four bosses and the center line of the window 8 has an angular requirement; there are threaded holes on the top of the bosses. Therefore, it is necessary to design a device to position the bosses for assisting welding. This device uses the through holes of the window on the cylinder as the positioning reference to achieve the positioning of the bosses. If the method of scribing each cylinder is adopted to achieve the positioning of the boss parts, it will not only lead to poor product consistency, but also reduce the production efficiency. Therefore, solving the problem of rapid and accurate positioning of the bosses plays an extremely important role in the production efficiency and quality of the product. Summary of the Invention

[0003] The present invention provides a positioning device for boss parts on a cylindrical structure to achieve the positioning before welding the bosses.

[0004] A positioning device for boss parts on a cylindrical structure, characterized in that it mainly includes a main board 1, a connecting rod 2, a positioning plate 3 and a pin 4;

[0005] Among them, the main board 1 is a steel plate with a weight-reducing hole in the middle. There is a counterbore 11 at each of the four corners of the lower surface of the main board 1. The connecting rod 2 is a narrow strip-shaped steel plate in an "L" shape. The end face of the A branch rod 21 of the connecting rod 2 is connected to the left end face of the main board 1, so that the A branch rod 21 of the connecting rod 2 and the main board 1 are in the same plane. The end face of the B branch rod 22 of the connecting rod 2 is welded to the positioning block 3; the end face of the B branch rod 22 is at a set angle with the longitudinal direction of the B branch rod 22. The size of the positioning block 3 is the same as the size of the window 8 on the to-be-processed cylinder 7. There is a through hole 31 at a set position on the positioning block 3, and the through hole 31 on the positioning block 3 corresponds to the positioning hole 81 on the window 8 of the to-be-processed cylinder;

[0006] During use, insert the 4 bosses 6 to be welded into the counterbores 11 at the four corners of the lower surface of the main board 1 respectively and fix them to the counterbores 11. Align the through hole 31 on the positioning plate 3 with the positioning hole 81 on the window 8 of the to-be-processed cylinder 7, and connect the through hole 31 on the positioning plate 3 and the positioning hole 81 of the window 8 together with the pin 4. At this time, make the lower end faces of the 4 bosses 6 abut against the to-be-processed cylinder 7. The position where the lower end faces of the bosses 6 are located is the position where the bosses 6 should be connected to the to-be-processed cylinder 7, and the positioning is completed.

[0007] The upper end face of the boss 6 is provided with a boss mounting hole 61. Correspondingly, a counterbore center hole 12 is provided at the bottom of the counterbore 11 of the main board 1. After the boss 6 is inserted into the counterbore 11, the bolt 5 passes through the counterbore center hole 12 to fixedly connect the boss 6 to the bottom of the counterbore 11 together.

[0008] The end face of the A-branch rod 21 of the connecting rod 2 is connected to the left end face of the main board 1 by welding.

[0009] Advantages of the present invention

[0010] The structure of the present invention is simple and the operation is convenient. It solves the positioning problem of boss-like parts on the cylindrical structure and makes up for the defects of the prior art. Description of the drawings

[0011] Figure 1 Schematic diagram of the structure for positioning the boss 6 on the to-be-machined cylinder 7 of the present invention;

[0012] Figure 2 Front view of the boss 6;

[0013] Figure 3 Top view of the boss 6;

[0014] Figure 4 Front view of the main board 1 of the present invention;

[0015] Figure 5 Top view of the main board 1 of the present invention;

[0016] Figure 6 Front view of the connecting rod 2 of the present invention;

[0017] Figure 7 Front view of the positioning plate 3 of the present invention.

[0018] Among them, 1 is the main board, 2 is the connecting rod, 3 is the positioning block, 4 is the pin, 5 is the bolt, 6 is the boss, 7 is the to-be-machined cylinder, 8 is the window, 11 is the counterbore, 12 is the counterbore center hole, 21 is the A-branch rod, 22 is the B-branch rod, 31 is the through hole, 61 is the boss mounting hole, and 81 is the positioning hole. Specific embodiments

[0019] The purpose of the device and the solution to its technical problems are achieved by adopting the following technical solutions. The device proposes a device for positioning boss 6-like parts on a cylindrical structure, which mainly consists of five parts: a main board 1, a connecting rod 2, a positioning plate, a bolt 5, and a pin 4.

[0020] The main board 1 of this device is a steel plate with a weight-reducing hole in the middle. There are four counterbores that fit the shape of the bosses 6 at the four corners of the main board 1. The positional relationship of the four counterbores is consistent with the distribution dimension requirements of the four bosses 6, and is used to fix the bosses 6. There are four through holes in the middle of the bottom of the counterbore. The diameter of the through hole is the same as the diameter of the threaded hole at the top of the boss 6, and it is the fixing hole for the boss 6.

[0021] The connecting rod 2 of this device is a narrow and long strip-shaped steel plate in an "L" shape. One end is welded to the main board 1, and the other end is welded to the positioning block 3. The dimension of the connecting rod 2 is converted from the included angle dimension between the symmetry line of the distribution of the four bosses 6 and the center line of the window 8, so as to ensure the relative spatial position between the fixing hole of the boss 6 on the main board 1 and the reference hole on the positioning block 3.

[0022] The positioning block 3 of this device is a square steel plate with two through holes. The diameter and position of the through holes are consistent with and correspond to the reference holes at the window 8 on the to-be-machined cylinder 7.

[0023] The connections between the main board 1, the connecting rod 2 and the positioning block 3 of this device are all achieved by welding.

[0024] The diameter of the pin 4 of this device is the same as the diameter of the reference hole on the window 8, and it can be smoothly inserted and pulled out.

[0025] The diameter of the bolt 5 of this device is the same as the diameter of the threaded hole at the top of the boss 6, and it can be smoothly screwed on.

[0026] The following further illustrates this device through examples:

[0027] A device for positioning parts of the boss 6 type on a cylindrical structure is proposed, which mainly consists of five parts: the main board 1, the connecting rod 2, the positioning plate, the bolt 5, and the pin 4.

[0028] The main board 1 of this device is a steel plate with a weight-reducing hole in the middle. There are four counterbores that fit the shape of the bosses 6 at the four corners of the main board 1. The positional relationship of the four counterbores is consistent with the distribution dimension requirements of the four bosses 6, and is used to fix the bosses 6. There are four through holes in the middle of the bottom of the counterbore. The diameter of the through hole is the same as the diameter of the threaded hole at the top of the boss 6, and it is the fixing hole for the boss 6.

[0029] The connecting rod 2 of this device is a narrow and long strip-shaped steel plate in an "L" shape. One end is welded to the main board 1, and the other end is welded to the positioning block 3. The dimension of the connecting rod 2 is converted from the included angle dimension between the symmetry line of the distribution of the four bosses 6 and the center line of the window 8, so as to ensure the relative spatial position between the fixing hole of the boss 6 on the main board 1 and the reference hole on the positioning block 3.

[0030] The positioning block 3 of this device is a square steel plate with two through holes. The diameter and position of the through holes are consistent with and correspond to the reference holes at the window 8 on the to-be-processed cylinder body 7.

[0031] The main board 1, connecting rod 2 and positioning block 3 of this device are all connected by welding.

[0032] The diameter of the pin 4 of this device is the same as that of the reference hole on the window 8, and it can be smoothly inserted and pulled out.

[0033] The diameter of the bolt 5 of this device is the same as that of the threaded hole at the top of the boss 6, and it can be smoothly screwed on.

[0034] When in use, it can be operated in the following way:

[0035] The first step: Put the 4 welding bosses 6 into the counterbores on the back of the main board 1. The threaded holes of the bosses 6 are closely aligned with the through holes on the main board 1. Respectively pass the 4 bolts 5 through the 4 through holes from the front of the main board 1, and fasten the bosses 6 in the counterbores on the main board 1.

[0036] The second step: Place this device on the surface of the to-be-processed cylinder body 7, align the two through holes of the positioning plate with the two reference holes of the window 8 on the cylinder wall, insert the pin 4 into the hole on the positioning plate of this device and the reference hole of the window 8 on the cylinder wall, and fix this device on the outer surface of the to-be-processed cylinder body 7.

[0037] The third step: Spot-weld the edges where the bottoms of the four bosses 6 contact the to-be-processed cylinder body 7.

[0038] The fourth step: Remove the pin 4 on the positioning plate and the bolt 5 on the main board 1, and take off this positioning device.

[0039] The fifth step: Weld the already positioned bosses 6 on the cylinder wall.

Claims

1. A positioning device for boss-like parts on a cylindrical structure, characterized in that It includes a main board (1), a connecting rod (2), a positioning block (3) and a pin (4); Among them, the main board (1) is a steel plate with a weight-reducing hole in the middle. There is a counterbore (11) at each of the four corners of the lower surface of the main board (1). The connecting rod (2) is a narrow and long steel plate in an "L" shape. The end face of the A rod (21) of the connecting rod (2) is connected to the left end face of the main board (1), so that the A rod (21) of the connecting rod (2) and the main board (1) are in the same plane. The end face of the B rod (22) of the connecting rod (2) is welded to the positioning block (3); the end face of the B rod (22) is at a set angle with the longitudinal direction of the B rod (22). The size of the positioning block (3) is the same as the size of the window (8) on the to-be-machined cylinder (7). There is a through hole (31) at a set position on the positioning block (3), and the through hole (31) on the positioning block (3) corresponds to the positioning hole (81) on the window (8) of the to-be-machined cylinder; During use, the 4 bosses (6) to be welded are respectively inserted into the counterbores (11) at the four corners of the lower surface of the main board (1) and fixedly connected to the counterbores (11). Align the through hole (31) on the positioning block (3) with the positioning hole (81) on the window (8) of the to-be-machined cylinder (7), and use the pin (4) to connect the through hole (31) on the positioning block (3) and the positioning hole (81) of the window (8). At this time, make the lower end faces of the 4 bosses (6) stick to the to-be-machined cylinder (7). The position where the lower end faces of the bosses (6) are located is the position where the bosses (6) should be connected to the to-be-machined cylinder (7), and the positioning is completed.

2. The positioning device for the boss-like parts on the cylindrical structure according to claim 1, wherein, The upper end face of the boss (6) is provided with a boss mounting hole (61). Correspondingly, the bottom of the counterbore (11) of the main board (1) is provided with a counterbore center hole (12). After the boss (6) is inserted into the counterbore (11), the bolt (5) passes through the counterbore center hole (12) to fixedly connect the boss (6) and the bottom of the counterbore (11) together.

3. A positioning device for boss-like parts on a cylindrical structure according to claim 1 or 2, characterized in that, The end face of the A rod (21) of the connecting rod (2) is connected to the left end face of the main board (1) by welding.

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