JPS62114729A - Forming device in seam welded pipe production equipment - Google Patents

Abstract

PURPOSE:To shorten the roll changing time and to facilitate the fine adjustment after roll changing by setting up a main drive before a forming part, to make a receiving roller unit unadjusted and by adjusting the height of the push roller unit. CONSTITUTION:The feeding power of a material and bending motive power are fed by providing the main drive 3 having a flat roller 3a at the front of a forming part. A receiving roller unit 1 has a unit on each pipe making size to make each unit unnecessary for adjustment. A push roller unit 2 is borne freely attachably and detachably by a clamp device. This push roller unit has a unit on each pipe making size and the height thereof is adjusted by an adjusting device for the variation in the plate thickness. With this mechanism, the number of each unit 1, 2 can be reduced and the equipment cost in the pipe production can be lowered.

Description

DETAILED DESCRIPTION OF THE INVENTION (Related Technical Field) In an electric resistance welded pipe manufacturing facility, a pipe is formed into a circular shape using a forming device, passed through a fin pass mill, and then electrically welded.

The present invention relates to an improvement of a forming device in such an equipment for manufacturing electric resistance welded pipes.

(Prior Art) In conventional electric resistance welded pipe manufacturing equipment, when cage forming is performed in the forming section: 1) Since the cage roll group is common to all sizes, fine adjustment is required for each size.

2) Also, the material feeding force of the forming section was taken care of by the Nα1 breakdown shape roll of the forming section.

(Problems and objectives to be solved by the invention) Reduce roll replacement time when changing sizes, facilitate fine adjustment work after roll replacement, reduce crane work within ERW pipe manufacturing equipment, and reduce equipment costs. The aim is to reduce this.

(Solution) In the ERW pipe manufacturing equipment, the main drive is installed before the start of forming, and the drive roller is eliminated from the start of forming until the fin pass mill is engaged, and the forming section has no adjustment mechanism. A replaceable receiving roller unit is provided, and the push roller is a replaceable push roller unit that only has a height adjustment mechanism based on changes in plate thickness.

(Example) This will be explained based on the drawings. 1 is a receiving roller unit in the forming section, and 2 is a pushing roller unit. 3 is a main drive provided with a flat roll 3a provided in front of the forming section, and 4 is a common base. 5 is a push roller height adjustment device, and 6 is a push roller unit clamp group.

Now, the main drive 3 having a flat roller 3a in front of the forming section supplies all the material feeding force and bending power from the start of forming until it enters the fin pass mill. That is, all rollers from the start of forming until they are bitten by the fin pass mill are idler rollers.

The receiving roller unit 1 has units for each pipe manufacturing size, and each unit does not need to be adjusted at all. In other words, the roller arrangement was made to match the roll flower.

The push roller unit 2 is supported by a clamp device 6, and can be easily attached or detached by removing the clamp 6. This push roller unit 1 also has a unit for each pipe manufacturing size, and the unit is replaced when changing the size. Adjustments are made by the height adjustment device 5 for changes in plate thickness.

(Function) To change the size, remove the clamp device 6 of the push roller unit 2, and replace the push roller unit 2 and the receiving roller unit 1. Since the receiving roller unit 1 and the pushing roller unit 2 are used as the starting part for forming, they can be used in common for pipe manufacturing to a certain extent, so the number of units only needs to be several sizes each. In particular, the first unit 1 on the entry side (both the receiving roller unit and the pushing roller unit) can be used in common for all sizes.

(Effects) 1) Since the main drive is installed before starting forming, it is possible to use a flat roll that can be used for all sizes. Also, since it is a flat roller, the roller diameter can be made small.

2) The large-diameter forming rollers for each pipe manufacturing size have been changed to a roller unit that uses many small-diameter rollers, resulting in cost savings and ease of handling.

3) Forming is performed smoothly because the small diameter rollers are arranged at a small pitch.

4) Since there is no drive roller in the forming part, the structure is simple. Moreover, since the structure is simple, there is an advantage that the time for replacing the rolls is greatly shortened.

[Brief explanation of drawings]

FIG. 1 is a front view of a forming device for electric resistance welded pipe manufacturing equipment according to the present invention. Figure 2 is a view in the direction of the ■ arrow in Figure 1. In the figure; 1 receiving roller unit 2 pushing roller unit 3 main drive 3a flat roll 4 common base
5 Presser foot height adjustment device 6 Clamp device or higher

Claims (1)

[Claims] In ERW pipe manufacturing equipment, the main drive is installed before the start of forming, eliminating the need for a drive roller from the start of forming until it engages the fin pass mill, and a replaceable receiving roller unit with no adjustment mechanism in the forming section. A forming device for an electric resistance welded pipe manufacturing facility, characterized in that the push roller is a replaceable push roller unit having only a height adjustment mechanism according to changes in plate thickness.