Machining process method of large forge piece lifting hook

Abstract

The invention provides a machining process method of a large forge piece lifting hook. The machining process method comprises the following steps of 1, material selecting and blanking, 2, forging, 3,normalizing and high temperature tempering, 4, shell making, 5, thermal refining, 6, load testing, and 7, comprehensive inspecting and flaw detecting after load testing. The forge piece lifting hook prepared by the process can meet the overall load capacity and the internal quality of the lifting hook.

Description

technical field

[0001] The invention relates to the field of aviation investment casting, in particular to a processing method for a large forging hook. Background technique

[0002] The hook is one of the most common hoisting machinery spreaders, which is suspended on the wire rope of the hoisting mechanism by means of a pulley block. There are two types of hooks: single hook and double hook. The single hook is easy to manufacture, and the load that can be lifted is generally less than 80 tons.

[0003] The development of large-scale high-strength alloy steel hook products is a large-scale lifting hook used in offshore engineering ships (such as large crane ships, pipe-laying ships, dredgers, large shipyard gantry cranes and drilling platforms, etc.), with a total height of 2840mm , The width of the hook body is 2030mm, the net weight is 7.7t, and the lifting tonnage of the unit is 4500t. It is used to make hook forgings with a hook body width and thickness of 1600mmx1600...

Examples

Embodiment Construction

[0039] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0040] like Figure 1-5 Shown, a kind of processing technology method of large forging hook, is characterized in that, comprises the following steps:

[0041] Step 1, material selection and cutting

[0042] DG20Mn, Q345qD, Q420qD, 35CrMo, 34CrNiMo, 34Cr2Ni2Mo or 30Cr2Ni2Mo (34CrNiMo6) high-quality alloy steel ingots are used for blanking;

[0043] Step 2. Forging

[0044] Control the total forging ratio of the steel ingot forging hook, heat the material in the heating furnace, after heating to the set temperature, put the hook body on the hydraulic hammer and large equipment to forge the hook body into a square, and the rod of the hook body is made of a manipulator Flip upsetting and pull out into a round shape, keep the final forging temperature of the workpiece, put it in a sandbox for heat preservation and slow cooling after forging;

[0045] Step 3, nor...

technical field

[0001] The invention relates to the field of aviation investment casting, in particular to a processing method for a large forging hook. Background technique

[0002] The hook is one of the most common hoisting machinery spreaders, which is suspended on the wire rope of the hoisting mechanism by means of a pulley block. There are two types of hooks: single hook and double hook. The single hook is easy to manufacture, and the load that can be lifted is generally less than 80 tons.

[0003] The development of large-scale high-strength alloy steel hook products is a large-scale lifting hook used in offshore engineering ships (such as large crane ships, pipe-laying ships, dredgers, large shipyard gantry cranes and drilling platforms, etc.), with a total height of 2840mm , The width of the hook body is 2030mm, the net weight is 7.7t, and the lifting tonnage of the unit is 4500t. It is used to make hook forgings with a hook body width and thickness of 1600mmx1600...

Examples

Embodiment Construction

[0039] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0040] like Figure 1-5 Shown, a kind of processing technology method of large forging hook, is characterized in that, comprises the following steps:

[0041] Step 1, material selection and cutting

[0042] DG20Mn, Q345qD, Q420qD, 35CrMo, 34CrNiMo, 34Cr2Ni2Mo or 30Cr2Ni2Mo (34CrNiMo6) high-quality alloy steel ingots are used for blanking;

[0043] Step 2. Forging

[0044] Control the total forging ratio of the steel ingot forging hook, heat the material in the heating furnace, after heating to the set temperature, put the hook body on the hydraulic hammer and large equipment to forge the hook body into a square, and the rod of the hook body is made of a manipulator Flip upsetting and pull out into a round shape, keep the final forging temperature of the workpiece, put it in a sandbox for heat preservation and slow cooling after forging;

[0045] Step 3, nor...

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