Hydraulic Roof Sheet Crimping & Curving Machine | Huatong - Botou China

Hydraulic Roofing Sheet Crimping and Curving Machine by Botou Huatong

The Botou Huatong hydraulic crimping and curving machine bends flat, roll-formed metal roofing sheets into smooth curves for arched and curved roofs. It works by pressing a series of small crimps into the sheet at set intervals, which shortens one side of the profile and makes the sheet curve to the required radius. A PLC controls the number and spacing of crimps, so operators can set the radius precisely and repeat it sheet after sheet. The machine is built by Botou Huatong Corrugated Machinery in Botou, Hebei, China.

What Is a Crimping and Curving Machine?

A crimping and curving machine, also called a crimp curving machine or roof sheet bending machine, is used alongside a roof panel roll forming line. Roll formers produce straight sheets, but many buildings need curved roofing: arched warehouse and hangar roofs, barrel-vault canopies, curved eaves, bus shelters, carports, and the curved transition from roof to wall. The crimping machine takes straight trapezoidal or IBR sheets and curves them to the design radius without cracking the paint or distorting the profile.

How the Machine Works

1. Sheet feeding. A finished roofing sheet is fed into the machine along its length.

2. Hydraulic crimping. A hydraulic press drives crimping dies shaped to the sheet profile, pressing small crimps across the ribs at regular intervals.

3. Controlled curving. Each crimp shortens the sheet slightly on one side. The closer the crimps, the tighter the curve.

4. PLC control. The operator enters the crimp spacing and count on the control panel, and the machine feeds and crimps automatically to produce the programmed radius.

Typical Specifications

The figures below show a standard configuration for a hydraulic roof sheet crimping and curving machine of this type. Huatong builds the crimping dies to match each customer's roofing profile, so confirm exact figures when requesting a quote.

Material
Material type: Pre-painted steel (PPGI), galvanized steel, galvalume, and aluminum
Material thickness: 0.3 to 0.8 mm
Profiles: Trapezoidal, IBR, and similar roofing profiles, with dies made to the customer's profile

Curving
Curving method: Hydraulic crimping
Minimum radius: About 500 mm, depending on profile and thickness
Radius control: Set by crimp spacing on the PLC

Dies
Die material: Cr12 tool steel, hardened to HRC 58 to 62
Die design: Matched to the customer's roofing profile

Power and Drive
Hydraulic station power: 4 to 5.5 kW
Feeding motor power: 1.5 to 3 kW

Control System
PLC: Delta, Siemens, or equivalent, with touch screen
Functions: Crimp spacing, crimp count, and automatic feeding
Power supply: 380 V, 50 Hz, 3-phase, customizable to local voltage

Machine
Approximate weight: 1.5 to 2.5 tons
Approximate size: 2.0 × 1.5 × 1.3 m

Key Features

Precise, repeatable curves. PLC-controlled crimp spacing gives a consistent radius on every sheet.

Works with existing roofing lines. The machine curves sheets already made on a trapezoidal or IBR roll forming machine, so producers can add curved roofing without a new forming line.

Hydraulic power. Hydraulic crimping gives even force across the profile, for clean crimps without cracking the coating.

Custom dies. Huatong makes the crimping dies to the customer's profile drawing.

Compact footprint. The machine takes up little floor space and can sit beside the roll forming line.

Applications

The machine is used by roofing sheet producers and steel building contractors to make curved roofs for warehouses, hangars, agricultural buildings, sports halls, carports, bus and petrol station canopies, walkways, and curved eaves on houses and commercial buildings.

About the Manufacturer

Botou Huatong Corrugated Machinery Manufacturing Co., Ltd. was established in 2011 on National Road 104 in Botou, Cangzhou, Hebei Province. Its factory covers 10,000 to 30,000 square meters with more than 10 production lines, and it builds roof panel, glazed tile, floor deck, purlin, shutter door, and guardrail roll forming machines. Average lead time is 45 days, and machines ship from Tianjin Port.

Frequently Asked Questions

What does a crimping and curving machine do?
It bends straight metal roofing sheets into curves by pressing small crimps across the sheet at set intervals.

How is the curve radius controlled?
The radius is set by the spacing of the crimps, which the operator programs on the PLC. Closer crimps make a tighter curve.

What roofing profiles can it curve?
Machines of this type curve trapezoidal, IBR, and similar profiles. The crimping dies are made to match the customer's profile.

What thickness sheet can be curved?
Typical crimp curving machines handle sheet from 0.3 to 0.8 mm thick.

How tight a curve can it make?
Typical minimum radius is about 500 mm, depending on the profile and material thickness. Confirm with Huatong for your profile.

Do I need a separate roll forming machine?
Yes. The crimping machine curves sheets that have already been roll formed. Many buyers order it together with a roof panel roll forming machine.

What is the lead time?
Huatong's average lead time is 45 days.