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Finished stretching and straightening method of titanium belt for plate heat exchanger

A technology for plate heat exchangers and titanium strips, which is applied in the field of finished product tensioning and straightening of titanium strips for plate heat exchangers, which can solve the problems of large metal loss, low yield, and long time consumption, and achieve the effect of smooth stamping and forming

Active Publication Date: 2017-04-19
BAOJI TITANIUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above-mentioned technical problems, the purpose of the present invention is to provide a method for correcting the shape of the plate by using a stretching and bending straightening unit to replace the plate with pure titanium strip, so as to solve the existing sheet-type shape correction process, which is cumbersome and time-consuming. , Large metal loss and low yield

Method used

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  • Finished stretching and straightening method of titanium belt for plate heat exchanger
  • Finished stretching and straightening method of titanium belt for plate heat exchanger
  • Finished stretching and straightening method of titanium belt for plate heat exchanger

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: Tension-leveling process of pure titanium strips for plate heat exchangers with a thickness of 0.5 mm and a width of 1180 mm. See Table 1 for the specific process parameters and the comparison before and after tension leveling, and see Table 2 for the comparison of mechanical properties before and after tension leveling.

[0030] Table 1 The specific parameters of the 0.5mm plate replaced with titanium belt tension leveling and the comparison before and after tension leveling

[0031]

[0032] Table 2 Comparison of mechanical properties at room temperature before and after the 0.5mm plate is replaced with titanium belt for tension leveling

[0033]

[0034] When the tension, reduction and elongation are matched with each other according to the parameter values ​​listed in Table 1, the 0.5mm plate can be replaced with pure titanium strip. The crown height of the original 10mm is straightened to 0~2mm, and the width is reduced 3mm. It can be seen from T...

Embodiment 2

[0035] Embodiment 2: Tension and straightening process of pure titanium strips for plate heat exchangers with a thickness of 0.8 mm and a width of 1080 mm. The specific process parameters and the comparison before and after tension leveling are shown in Table 3. The comparison of mechanical properties at room temperature before and after tension leveling is shown in Table 4.

[0036] Table 3 The specific parameters of the 0.8mm plate replaced with titanium belt for tension leveling and the comparison before and after tension leveling

[0037]

[0038] Table 4 Comparison of mechanical properties at room temperature before and after the 0.8mm plate is replaced with titanium belt for tension leveling

[0039]

[0040] When the tension, reduction and elongation match each other according to the parameter values ​​listed in Table 3, the arch height of the 0.8mm plate can be replaced with pure titanium strip from the original 12mm to 0~4mm, and the width is reduced at the sam...

Embodiment 3

[0041] Embodiment 3: Tension-leveling process of pure titanium strips for plate heat exchangers with a thickness of 1.0mm and a width of 1080mm. The specific process parameters and the comparison before and after tension leveling are shown in Table 5. The comparison of mechanical properties at room temperature before and after tension leveling is shown in Table 6.

[0042] Table 5 The specific parameters of the 1.0mm plate replaced with titanium belt for stretching and straightening and the comparison before and after stretching and straightening

[0043]

[0044] Table 6 Comparison of mechanical properties at room temperature before and after the 1.0mm plate is replaced with titanium belt for tension leveling

[0045]

[0046] When the tension, reduction and elongation match each other according to the parameter values ​​listed in Table 5, the arch height of the 1.0mm plate can be replaced with pure titanium strip from the original 12mm to 0~5mm, and the width is reduc...

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Abstract

A method for withdrawing and straightening a titanium band finished product for a plate heat exchanger includes the following steps that a roll of titanium band for the plate heat exchanger is sent into a chassis type vacuum furnace to be annealed in a rolling mode; the roll of annealed titanium band is sent to an unwinding machine to be unwound; one end of the unwound titanium band is sent into a five-roller straightening machine to be straightened and then passes through an end-cut shearing head to be welded to the tail portion of a guide band; tensile force is applied, the titanium band starts to run and enters withdrawing and straightening machines after passing through a 1# tension roller set, and the withdrawing and straightening machines start to work after the weld joint passes through the withdrawing and straightening machines; the titanium band passes through a 2# tension roller set, a 3# tension roller set and a vertical movable sleeve and enters a 4# tension roller set after being withdrawn and straightened by the withdrawing and straightening machines; the titanium band passes through a three-roller correction device and a circle shear and reaches an outlet shear after coming out of the 4# tension roller set so that the guide band and the titanium band can be cut off; the titanium band after cutting off is sent into a winding machine through an outlet clamping roller to be wound. The band shape is corrected through a withdrawing and straightening machine set, and then the problems that an existing sheet shape-correcting process is complex in procedure, long in consumed time, large in metal loss and low in yield are solved.

Description

technical field [0001] The invention relates to the technical field of manufacturing titanium strips for plate heat exchangers, in particular to a finished stretching and straightening method for titanium strips for plate heat exchangers. Background technique [0002] Pure titanium plates and strips are often used to make plate heat exchangers because of their good corrosion resistance, high heat transfer efficiency, low specific gravity, and high strength. Due to the characteristics of thin strip rolling and vacuum coil annealing, the annealed strip is prone to shape problems such as double-sided waves and intermediate waves, and cracks are prone to occur in the subsequent stamping forming, which affects the use. At present, pure titanium plates for plate heat exchangers are mostly produced in sheet form. After the finished product is annealed, the shape is corrected by pressing to correct the plate shape; or the strip is rolled and annealed, and then cut to the size requir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/18B23P15/00
Inventor 王俭李晓军杨娟丽王勤波陈猛
Owner BAOJI TITANIUM IND
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