| 摘要 |
A method for manufacturing a spiral square pipe is provided to enable a user to use the spiral square pipe in a multipurpose way by supplying a spiral square pipe. A method for manufacturing a spiral square pipe comprises the following steps. A metallic round-type pipe employing a spiral pattern is manufactured(S1). The manufactured round-type pipe is passed between a pair of the first rollers(S2). The passed round-type pipe of the step(S2) is passed between a pair of the second rollers(S3). The passed round-type pipe of the step(S3) is passed between a pair of the third rollers(S4). The passed round-type pipe of the step(S4) is passed between a pair of the fourth rollers(S5). The passed round-type pipe of the step(S5) is trimmed to become the spiral square pipe(S6).
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