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Hydraulic tube expanding device

A tube expansion device and hydraulic technology, which is applied in the field of hydraulic tube expansion, can solve problems such as pressure fluctuations, and achieve the effects of large expansion force, improved production and processing efficiency, and high hardness

Pending Publication Date: 2020-07-24
ZHONGSHAN LESSO WALTON COATING STEEL PLASTIC PIPECO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the existing liquid bag hydraulic expansion tube that requires frequent replacement of elastic glue, and the pressure fluctuation affects the production process, and provides a hydraulic tube expansion device

Method used

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  • Hydraulic tube expanding device
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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0017] like Figure 1 to Figure 2 Shown is the first embodiment of a hydraulic tube expansion device of the present invention. A hydraulic tube expansion device, which is composed of an oil cylinder 6, a guide sleeve 3, a fixed seat 1 and an expansion tube component. The oil cylinder 6 is provided with an oil cylinder pull rod 7, and the oil cylinder pull rod 7 is connected to the fixed seat 1. The expansion tube component is connected to the oil cylinder 6 The inside of the fixed seat 1 is connected.

[0018] Wherein, a piston 12 and a cylinder shaft are arranged inside the oil cylinder 6, and the expander components include a conical slider 4 and a conical top core 2, the conical top core 2 passes through the inside of the conical slider 4, the fixed seat 1 and the guide sleeve 3 Fasten and connect with the positioning step screw 5, and the cylinder shaft and the small-diameter end of the conical top core 2 are fixedly connected inside the fixed seat 1 and the guide sleeve ...

no. 2 example

[0024] This embodiment is similar to the first embodiment, except that the gap between the conical top core 2 and the conical slider 4 in this embodiment is 0.19mm.

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PUM

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Abstract

The invention provides a hydraulic tube expanding device. The hydraulic tube expanding device comprises an oil cylinder, a fixed seat, a guide sleeve and a tube expanding component, wherein the tube expanding component comprises a tapered top core and at least two tapered sliding blocks arranged on the circumferential outer wall of the tapered top core, the oil cylinder is fixedly connected to oneend of the fixed seat by a cylinder pulling rod, the guide sleeve is fixedly connected to the other end of the fixed seat, the small head end of the tapered top core extends into the fixed seat through the guide sleeve and is connected with an oil cylinder shaft, one end, closing to the small head end of the tapered top core, of the tapered sliding blocks extends into the guide sleeve and is connected with the guide sleeve by an elastic piece and a guide piece. The hydraulic tube expanding device can perform frequent tube expansion processing, has a long service life without replacing parts frequently, the production efficiency is improved, and the hydraulic tube expanding device has low using cost.

Description

technical field [0001] The present invention relates to the technical field of hydraulic tube expansion, and more particularly relates to a hydraulic tube expansion device. Background technique [0002] Plastic-lined and plastic-coated steel pipes need to be grooved at the end when they are connected by clamps. The inner lining or inner coating will have a delamination phenomenon during the groove, which will affect the performance and appearance of the product. After the pipe is equipped with a stainless steel sleeve, the groove can be To eliminate this phenomenon, a tube expander must be used to tighten the stainless steel sleeve before pressing the groove so that the stainless steel sleeve fits the plastic layer to prevent slipping and loosening when the groove is pressed. The existing liquid bag hydraulic tube expander uses pressure oil to directly press into the elastic rubber cavity so that the outer diameter of the elastic rubber expands and expands. Replacement. At ...

Claims

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Application Information

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IPC IPC(8): B21D39/20
CPCB21D39/20
Inventor 潘喜强
Owner ZHONGSHAN LESSO WALTON COATING STEEL PLASTIC PIPECO LTD