Special tool for hoisting piston head

Abstract

The utility model provides a special tool for hoisting a piston head, which comprises a first arc-shaped hoop and a second arc-shaped hoop which are arranged in pairs, first lug plates are symmetrically arranged at the opening end of the first arc-shaped hoop, and second lug plates are symmetrically arranged at the opening end of the second arc-shaped hoop; the first arc-shaped hoop and the second arc-shaped hoop are clamped outside the piston head and are fixedly connected through a bolt assembly; a first hoisting rod is fixed on the outer wall of the arc-shaped middle part of the first arc-shaped hoop, and a second hoisting rod is fixed on the outer wall of the arc-shaped middle part of the second arc-shaped hoop. The hoisting tool is suitable for accurate and safe hoisting in the surfacing process of the corrosion-resistant nickel-chromium alloy material of the piston head of the large-cylinder-diameter diesel engine by adopting a welding robot, so that high-efficiency batch production is facilitated; and the piston head can be conveniently and safely lifted by a lifting worker, and the piston head is prevented from falling off in the process of using a magnet to lift due to overhigh surfacing temperature.

Description

Technical Field

[0001] The utility model relates to the technical field of piston head processing, and mainly relates to a special tooling for lifting a piston head. Background Art

[0002] One of our company's products is the piston head. In order to ensure the high temperature and corrosion resistance of the piston head, it is necessary to weld a high temperature and corrosion resistant nickel-chromium alloy (Inconel 625) in the high temperature and high pressure combustion zone on the top of the piston head. In order to improve the welding efficiency of the piston head welding, reduce the labor intensity of welders and save production costs, the company has decided to carry out mass and efficient production of robot welding piston head welding. The piston head body is made of S20CrMoVS forgings. The Inconel 625 corrosion-resistant material with a minimum thickness of 3mm (processed size) is welded on the entire area of ​​the top of the piston head. The temperature is as high as 300°C. It is a big problem to lift and transport the piston head after the welding is completed. Utility Model Content

[0003] In order to solve the above-mentioned technical problems, the utility model provides a special tooling for lifting a piston head. This lifting tooling is suitable for accurate and safe lifting during the surfacing welding process of corrosion-resistant nickel-chromium alloy materials of large-cylinder diesel engine piston heads using welding robots, so as to carry out efficient mass production; it is convenient for the crane operator to lift safely and prevent the piston head from falling off during the use of magnetic lifting due to excessively high surfacing temperature.

[0004] In order to realize the above technical features, the purpose of the utility model is achieved as follows: a special tool for lifting a piston head, comprising a first arc hoop and a second arc hoop arranged in pairs, the opening end of the first arc hoop is symmetrically provided with a first ear plate, and the opening end of the second arc hoop is symmetrically provided with a second ear plate;

[0005] The first arc-shaped hoop and the second arc-shaped hoop are clamped on the outside of the piston head and fixedly connected by a bolt assembly;

[0006] A first hoisting rod is fixed on the outer wall of the arc-shaped middle part of the first arc-shaped hoop, and a second hoisting rod is fixed on the outer wall of the arc-shaped middle part of the second arc-shaped hoop.

[0007] A first threaded hole is processed on the first ear plate; a second threaded hole is processed on the second ear plate; the first threaded hole and the second threaded hole are arranged concentrically.

[0008] The bolt assembly comprises a long bolt passing through a first threaded hole and a second threaded hole, and a nut is fixedly mounted on the other end of the long bolt.

[0009] Limiting rings are fixedly mounted on the ends of the first hoisting rod and the second hoisting rod.

[0010] The first hoisting rod and the second hoisting rod are both formed by cutting and welding round steel.

[0011] The portion on the outer wall of the first arc hoop that matches the first lifting rod and the portion on the outer wall of the second arc hoop that matches the second lifting rod are respectively processed with mounting holes, and the first lifting rod and the second lifting rod respectively correspond to the mounting holes and are fixed by fillet welds.

[0012] The first arc-shaped hoop and the second arc-shaped hoop are both cut by flame cutting of low-carbon steel plates.

[0013] The utility model has the following beneficial effects:

[0014] 1. The utility model is suitable for accurate and safe lifting of corrosion-resistant nickel-chromium alloy materials of large-bore diesel engine piston heads during surfacing welding by welding robots, so as to carry out efficient batch production; it is convenient for crane operators to lift safely and prevent the piston head from falling during the use of magnetic lifting due to excessively high surfacing temperature.

[0015] 2. The threaded hole mentioned above facilitates subsequent threaded connection with the bolt assembly, thereby achieving a reliable clamping connection between the first arc-shaped hoop and the second arc-shaped hoop.

[0016] 3. The above-mentioned bolt assembly facilitates the clamping of the first arc-shaped hoop and the second arc-shaped hoop.

[0017] 4. The above-mentioned limiting ring ensures that the wire rope can be limited during the subsequent lifting process, thereby effectively preventing the wire rope from falling off and ensuring the safety and reliability of the lifting process.

[0018] 5. The first hoisting rod and the second hoisting rod mentioned above facilitate subsequent connection with the wire rope to achieve hoisting operations.

[0019] 6. The reliability of subsequent fixing of the first hoisting rod and the second hoisting rod is ensured by the cooperation between the above-mentioned mounting holes and the corresponding first hoisting rod and the second hoisting rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is a top view of the tooling of the utility model.

[0022] Figure 2 It is a three-dimensional diagram of the tooling hoisting process of the utility model.

[0023] Figure 3 It is a top view of the first arc-shaped hoop of the utility model.

[0024] Figure 4 It is a front view of the first arc-shaped hoop of the utility model.

[0025] Figure 5 It is a top view of the second arc-shaped hoop of the utility model.

[0026] Figure 6 It is a front view of the second arc-shaped hoop of the utility model.

[0027] Figure 7 It is a rear view of the second arc-shaped hoop of the utility model.

[0028] In the figure: a first arc hoop 1, a first lifting rod 2, a long bolt 3, a first ear plate 4, a second ear plate 5, a nut 6, a second arc hoop 7, a second lifting rod 8, a first threaded hole 9, a limiting ring 10, a piston head 11, a surfacing layer 12, a second threaded hole 13, and a mounting hole 14. DETAILED DESCRIPTION

[0029] The embodiments of the present utility model are further described below in conjunction with the accompanying drawings.

[0030] Embodiment 1:

[0031] Lieutenant General Figure 1-7 , a special tool for lifting a piston head, comprising a first arc hoop 1 and a second arc hoop 7 arranged in pairs, the first arc hoop 1 is symmetrically provided with a first ear plate 4 at its open end, and the second arc hoop 7 is symmetrically provided with a second ear plate 5 at its open end; the first arc hoop 1 and the second arc hoop 7 are clamped on the outside of the piston head 11 and fixedly connected by a bolt assembly; a first lifting rod 2 is fixed on the outer wall of the arc-shaped middle part of the first arc hoop 1, and a second lifting rod 8 is fixed on the outer wall of the arc-shaped middle part of the second arc hoop 7. This lifting tool is suitable for accurate and safe lifting of corrosion-resistant nickel-chromium alloy materials of large-cylinder diesel engine piston heads using welding robots during surfacing welding, so as to carry out efficient mass production; it is convenient for the crane operator to lift safely and prevent the piston head from falling off during the use of magnetic lifting due to excessively high surfacing temperature. During specific use, by

[0032] Furthermore, the first ear plate 4 is processed with a first threaded hole 9; the second ear plate 5 is processed with a second threaded hole 13; the first threaded hole 9 and the second threaded hole 13 are arranged concentrically. The threaded holes facilitate subsequent threaded connection with the bolt assembly, thereby realizing a reliable clamping connection between the first arc hoop 1 and the second arc hoop 7.

[0033] Further, the bolt assembly includes a long bolt 3 passing through the first threaded hole 9 and the second threaded hole 13, and the other end of the long bolt 3 is fixedly mounted with a nut 6. The above bolt assembly facilitates the clamping of the first arc hoop 1 and the second arc hoop 7.

[0034] Furthermore, the end portions of the first hoisting rod 2 and the second hoisting rod 8 are fixedly mounted with a limit ring 10. The limit ring 10 ensures that the wire rope can be limited during the subsequent hoisting process, thereby effectively preventing the wire rope from falling off, and ensuring the safety and reliability of the hoisting process.

[0035] Furthermore, the first hoisting rod 2 and the second hoisting rod 8 are both formed by cutting and welding round steel. The first hoisting rod 2 and the second hoisting rod 8 are convenient for subsequent connection with the steel wire rope to realize the hoisting operation.

[0036] Furthermore, the portion on the outer wall of the first arc hoop 1 that matches the first hanging rod 2, and the portion on the outer wall of the second arc hoop 7 that matches the second hanging rod 8 are respectively processed with mounting holes 14, and the first hanging rod 2 and the second hanging rod 8 are respectively matched with the mounting holes 14, and are fixed by fillet welding. The matching of the mounting holes 14 with the corresponding first hanging rod 2 and second hanging rod 8 ensures the reliability of the subsequent fixing of the first hanging rod 2 and the second hanging rod 8.

[0037] Furthermore, the first arc hoop 1 and the second arc hoop 7 are both made of low-carbon steel plate flame cutting. The above materials ensure the structural strength and stability of the entire lifting tooling.

[0038] Embodiment 2:

[0039] A method for using a special tool for lifting a piston head:

[0040] Step 1, size design of special tooling:

[0041] According to the outer dimensions of the piston head 11 to be hoisted, the dimensions of the first arc hoop 1 and the second arc hoop 7 are determined, including the inner diameter and the outer diameter of the first arc hoop 1 and the second arc hoop 7;

[0042] Step 2, processing of special tooling:

[0043] According to the size determined in step 1, flame cutting is used to cut the low carbon steel plate, and then the first threaded hole 9, the second threaded hole 13 and the mounting hole 14 are processed by the machine. After the mounting hole 14 is processed, the first hanging rod 2 and the second hanging rod 8 are installed respectively. It is required to weld the first hanging rod 2 and the second hanging rod 8 with the surrounding of the mounting hole 14 with a fillet weld of at least 10 mm;

[0044] Step 3, clamping of the piston head 11:

[0045] The first arc-shaped hoop 1 and the second arc-shaped hoop 7 are arranged outside the piston head 11, and the long bolt 3 is passed through the first threaded hole 9 and the second threaded hole 13, and the nut is installed, so as to clamp and fix the first arc-shaped hoop 1 and the second arc-shaped hoop 7 outside the piston head 11;

[0046] Step 4, hoisting of the piston head 11:

[0047] During the lifting process, a steel wire rope is hung on the first lifting rod 2 and the second lifting rod 8, and the lifting equipment is started to lift the piston head 11.

[0048] Embodiment 3:

[0049] The utility model provides a universal design scheme of safe lifting tooling for all S50ME-C9.7 machine piston head robot surfacing products, which is convenient for crane operators to carry out safe lifting and prevent the piston head from falling off during the use of magnetic lifting due to excessively high surfacing temperature.

[0050] The technical scheme of the utility model is as follows: the tooling includes a first arc hoop 1, a second arc hoop 7, a first hoisting rod 2 and a second hoisting rod 8. The first arc hoop 1 and the second arc hoop 7 are divided into two half rings of ∅ 625 / ∅ 500, and are cut by flame cutting of low-carbon steel plates, and then the first threaded hole and the second threaded hole of M20 and the ∅25 mounting hole are processed by a transfer machine, and the inner circle is processed to ∅507. After the hole is processed, the round steel of ∅23 is welded on the mounting hole, and the round steel is inserted into the installation and welded around the inner circumference with a 10mm fillet weld, and then the first arc hoop 1 and the second arc hoop 7 are sleeved on the outer circle of the piston head and bolted, and the bolts and nuts are tightened to play a fixing role. In the lifting process, the steel wire rope is hung on the first hoisting rod 2 and the second hoisting rod 8, which is not only safe and reliable, but also can efficiently complete the lifting work.

[0051] With the help of the S50ME-C9.7 piston head lifting tool, the piston head lifting process becomes more efficient and safer, especially when the temperature of the piston head is very high after the surfacing welding is completed. By using the special lifting tool, compared with the use of magnetic lifting, not only the lifting difficulty is reduced, but also the lifting safety is improved. At the same time, this tool can be used to lift piston heads of different outer diameters by adjusting the size of the half ring. One tool can meet the production needs of lifting large quantities of different models of products, with very obvious economic benefits. In addition, this tool also provides a strong guarantee for the personal safety of the lifting operator and the safety of the lifting equipment. It can be said that this tool has obvious gain effects in many aspects.

Claims

1. A special tool for lifting a piston head, characterized in that: It comprises a first arc-shaped hoop (1) and a second arc-shaped hoop (7) arranged in pair, wherein the opening end of the first arc-shaped hoop (1) is symmetrically provided with a first ear plate (4), and the opening end of the second arc-shaped hoop (7) is symmetrically provided with a second ear plate (5); The first arc-shaped hoop (1) and the second arc-shaped hoop (7) are clamped on the outside of the piston head (11) and are fixedly connected by a bolt assembly; A first hoisting rod (2) is fixed on the outer wall of the arc-shaped middle part of the first arc-shaped hoop (1), and a second hoisting rod (8) is fixed on the outer wall of the arc-shaped middle part of the second arc-shaped hoop (7).

2. According to claim 1, a special tool for lifting a piston head, characterized in that: The first ear plate (4) is processed with a first threaded hole (9); the second ear plate (5) is processed with a second threaded hole (13); the first threaded hole (9) and the second threaded hole (13) are arranged concentrically.

3. The special tooling for lifting the piston head according to claim 2, characterized in that: The bolt assembly comprises a long bolt (3) passing through a first threaded hole (9) and a second threaded hole (13), and a nut (6) is fixedly mounted on the other end of the long bolt (3).

4. The special tooling for lifting the piston head according to claim 1, characterized in that: Limiting rings (10) are fixedly mounted on the ends of the first hoisting rod (2) and the second hoisting rod (8).

5. The special tooling for lifting the piston head according to claim 4 is characterized by: The first hoisting rod (2) and the second hoisting rod (8) are both made by cutting and welding round steel.

6. The special tool for lifting the piston head according to claim 5, characterized in that: A portion on the outer wall of the first arc-shaped hoop (1) that matches the first lifting rod (2) and a portion on the outer wall of the second arc-shaped hoop (7) that matches the second lifting rod (8) are respectively processed with mounting holes (14); the first lifting rod (2) and the second lifting rod (8) respectively match the mounting holes (14) and are fixed by fillet welding.

7. The special tooling for lifting the piston head according to claim 5, characterized in that: The first arc-shaped hoop (1) and the second arc-shaped hoop (7) are both made of low-carbon steel plates flame-cut.

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