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Production technology of longitudinal beam of high-strength heavy load truck

A technology for heavy-duty trucks and production processes, applied in the direction of manufacturing tools, other manufacturing equipment/tools, etc., can solve the problems of increasing the cost of the whole vehicle, low deformation resistance, increasing the weight of the frame, etc., to improve work efficiency and reduce overall weight. , the effect of reducing costs

Inactive Publication Date: 2009-12-16
SINO TRUK JINAN POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The frame riveted with this longitudinal beam has low deformation resistance, especially heavy trucks over 15 tons are easily deformed during use, causing user feedback
The designer's solution to this problem is to increase the strength of the frame by increasing the sub-beam (strengthening beam) and the thickness of the longitudinal beam, but at the same time it increases the weight of the frame and increases the cost of the vehicle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: a kind of production technology of high-strength heavy-duty truck stringer, comprises the following steps:

[0019] Coil (material 16Mn, plate thickness 6mm) --- uncoiling --- cutting --- leveling --- roll forming (press molding) -- quenching heat treatment (quenching temperature 840 ° C) -- -Punching (the diameter of the punching hole is less than or equal to twice the diameter of the plate thickness)----Laser cutting other holes that cannot be punched---transfer to other processes.

Embodiment 2

[0020] Embodiment 2: a kind of production technology of high-strength heavy-duty truck stringer, comprises the following steps:

[0021] Coil (material is low alloy steel, plate thickness 7mm) --- uncoiling --- cutting --- leveling --- roll forming (press molding) -- quenching heat treatment (quenching temperature 850 ℃ )---punching (punching diameter is less than or equal to twice the diameter of the plate thickness)---laser cutting other holes that cannot be punched---transfer to other processes.

Embodiment 3

[0022] Embodiment 3: a kind of production technology of high-strength heavy-duty truck stringer, comprises the following steps:

[0023] Coil (material 16Mn, plate thickness 8mm) --- uncoiling --- cutting --- leveling --- roll forming (press molding) -- quenching heat treatment (quenching temperature 860 ° C) -- -Punching (the diameter of the punching hole is less than or equal to twice the diameter of the plate thickness)----Laser cutting other holes that cannot be punched---transfer to other processes.

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PUM

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Abstract

The invention relates to a production technology of a longitudinal beam of a high-strength heavy load truck, comprising the following steps of: A, coiling materials; B, uncoiling; C, slitting; D, leveling; E, carrying out rolling shaping; F, carrying out quenching heat treatment, wherein the quenching temperature is 840 to 870 DEG C; G, punching, wherein the punching diameter is less than or equal to two times of that of the plate thickness; H, cutting holes which can not be punched by laser; and I, transferring into other procedures. Based on the existing technology, a quenching heat treatment technology is added before punching so as to achieve the aim of producing a high-strength longitudinal beam. If high-strength materials are directly adopted and purchased, the production technology at present is very difficult to realize, so all manufacturers do not adopt single-beam truck frames at present. By adopting the technology to carry out heat treatment, the mechanical property of the longitudinal beam is enhanced, and especially the yield limit can reach 800 to 900MPa. As the high-strength longitudinal beam is used, the strength of the car frame can be greatly enhanced by plate materials with the same thickness, a secondary beam can be cancelled simultaneously, so the total weight of the car frame can be reduced.

Description

technical field [0001] The invention relates to a production process of a longitudinal beam, in particular to a production process of a high-strength heavy-duty truck longitudinal beam. Background technique [0002] At present, the production process of heavy-duty truck longitudinal beams is: coil material (16Mn or other low-alloy steel material thickness 6-9mm) --- uncoiling --- cutting --- leveling --- roll forming (press molding) punching (drilling) ---- transfer to other processes. The single blank longitudinal beam processed by this process has comprehensive mechanical properties and the highest yield limit of the material is 600MPa, especially the yield limit has not been improved. The vehicle frame riveted with this longitudinal beam has low deformation resistance, especially heavy trucks over 15 tons are easily deformed during use, causing user feedback. The designer's way to solve this problem is to increase the strength of the frame by increasing the sub-beam (st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P23/04
Inventor 李相伟
Owner SINO TRUK JINAN POWER
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