Engineering mechanical processing technology of crank axle

A technology of construction machinery and processing technology, applied in metal material coating technology, manufacturing tools, coatings, etc., can solve problems such as poor corrosion resistance and high temperature resistance of crankshafts, increase manufacturing costs, and reduce service life. The effect of improving mechanical properties, prolonging service life, and controlling processing costs

Inactive Publication Date: 2019-03-26
徐州登蓓莱智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The crankshaft is one of the most important parts of the engine. It bears the force transmitted by the connecting rod and converts it into torque through the crankshaft output and drives other accessories on the engine. The crankshaft is subject to the centrifugal force of the rotating mass and the periodically changing gas inertia The combined action of force and reciprocating inertial force makes the crank bearing subject to t

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of construction machinery processing technique of crankshaft, concrete process steps are as follows:

[0019] (1) The round steel is screened as a whole, and the round steel whose material is 30CrMnTi is selected for blanking to form a blank, and the blank is rough processed by the equipment;

[0020] (2) The center hole is punched by the overall cutting of the round steel, and the error of the two center holes on the axis of the cylinder is controlled to be ≤0.6mm;

[0021] (3) The workpiece after rough machining is subjected to quenching and tempering treatment, and the temperature of the workpiece is slowly raised to 750 ° C, kept for 2 hours, and then annealed;

[0022] (4) finishing the workpiece after annealing;

[0023] (5) heat-treat the crankshaft after finishing in a carburizing furnace;

[0024] (6) Carry out sandblasting then, polish;

[0025] (7) Clean the crankshaft after grinding.

Embodiment 2

[0027] A kind of construction machinery processing technique of crankshaft, concrete process steps are as follows:

[0028] (1) The round steel is screened as a whole, and the round steel whose material is 30CrMnTi is selected for blanking to form a blank, and the blank is rough processed by the equipment;

[0029] (2) The center hole is punched by the overall cutting of the round steel, and the error of the two center holes on the axis of the cylinder is controlled to be ≤0.6mm;

[0030] (3) After rough machining, the workpiece is quenched and tempered, and the temperature of the workpiece is slowly raised to 1000 ° C, kept for 2 hours, and then annealed;

[0031] (4) finishing the workpiece after annealing;

[0032] (5) heat-treat the crankshaft after finishing in a carburizing furnace;

[0033] (6) Carry out sandblasting then, polish;

[0034] (7) Clean the crankshaft after grinding.

Embodiment 3

[0036] A kind of construction machinery processing technique of crankshaft, concrete process steps are as follows:

[0037] (1) The round steel is screened as a whole, and the round steel whose material is 30CrMnTi is selected for blanking to form a blank, and the blank is rough processed by the equipment;

[0038] (2) The center hole is punched by the overall cutting of the round steel, and the error of the two center holes on the axis of the cylinder is controlled to be ≤0.6mm;

[0039] (3) The workpiece after rough machining is subjected to quenching and tempering treatment, and the temperature of the workpiece is slowly raised to 1250 ° C, kept for 2 hours, and then annealed;

[0040] (4) finishing the workpiece after annealing;

[0041] (5) heat-treat the crankshaft after finishing in a carburizing furnace;

[0042] (6) Carry out sandblasting then, polish;

[0043] (7) Clean the crankshaft after grinding.

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PUM

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Abstract

The invention discloses an engineering mechanical processing technology of a crank axle. The engineering mechanical processing technology is characterized by comprising the following specific processing steps: (1) integrally screening round steel; (2) conducting integral blanking on the round steel and punching central holes, and controlling the error of the two central holes on a cylindrical axisto less than or equal to 0.6mm; (3) carrying out thermal refining on a workpiece after rough machining, slowly warming up the workpiece to 750-1250 DEG C, keeping the temperature for 2h and then carrying out annealing; (4) carrying out finish machining on the annealed workpiece; (5) carrying out heat treatment on the crank axle after finish machining in a carburizing furnace; (6) then carrying out sand blasting and polishing; and (7) cleaning the polished crank axle. With adoption of the engineering mechanical processing technology, the finished product ratio and processing quality of the crank axle are effectively improved, the processing efficiency is improved, the dependence of the processing technology on processing equipment is reduced, the processing cost is controlled, the mechanical performance of the workpiece is greatly promoted, the service lives of the workpiece and the complete engineering machinery are effectively prolonged, the maintenance cost is reduced and the corporate image and customer satisfaction are improved.

Description

technical field [0001] The invention relates to an engineering mechanical processing technology of a crankshaft. It belongs to the technical field of engineering machinery. Background technique [0002] The crankshaft is one of the most important parts of the engine. It bears the force transmitted by the connecting rod and converts it into torque through the crankshaft output and drives other accessories on the engine. The crankshaft is subject to the centrifugal force of the rotating mass and the periodically changing gas inertia The combined action of force and reciprocating inertial force makes the crankshaft bear the action of bending torsional load, so the crankshaft is required to have sufficient strength and rigidity, the journal surface needs to be wear-resistant, work evenly, and have good balance, but the existing crankshaft production process is complex , not only increased the manufacturing cost of the enterprise, but also produced the crankshaft with poor corro...

Claims

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Application Information

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IPC IPC(8): B23P15/00C21D9/30C23C8/00B24C1/00
CPCB23P15/00B24C1/00C21D9/30C23C8/00
Inventor 舒哲敏
Owner 徐州登蓓莱智能科技有限公司
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