Shandong Time Machinery Technology Co., Ltd.

"PC Rebar Truss Welding Production Line (SGHJ-IV)"

Equipment Information

Legal representative: Cui Hao

Phone: 13395378282

Address: Economic Development Zone, Jining City, Shandong Province

Website: www.sdsgzn.com

Table of Contents

I. Introduction to PC Composite Slab Project 3

1. Project Overview 3

2 .Production Process Introduction 4

3.PC Rebar Truss Finished Product (Right Angle Truss) 5

II.Equipment Performance and Technical Parameters 6

1.Technical Parameters of Rebar Truss Production Line 6

1.1 Equipment Overview 6

1.2 Equipment Composition of Rebar Truss Production Line 6

1.3 Equipment Technical Parameters: 7

1.4 Equipment Features 8

1.5 Equipment Configuration and Component Brands 10

2. Cooling water machine 11

2.1 Technical Specifications of Air-Cooled Box Cooling Unit: 11

3. Air Compressor 12

1.Technical Parameters of Air-cooled Screw Machine 13

I.Introduction to PC Composite Slab Project

1. Introduction to PC Composite Slab Project

1. Project Overview

Composite floor slab is a structural form that combines prefabricated and cast-in-place concrete. The prestressed thin plate (5-8 cm thick) is integrated with the upper cast-in-place concrete layer to form a unified structure and work together. The prestressed main reinforcement of the thin plate serves as the main reinforcement of the composite floor slab, while the upper cast-in-place layer only requires negative moment reinforcement and structural reinforcement. The prestressed thin plate also serves as the bottom formwork for the cast-in-place concrete layer, eliminating the need for additional formwork support. The bottom surface of the thin plate is smooth and even, and after joint treatment, there is no need for plastering the ceiling. These composite floor slabs have the advantages of overall integrity, high rigidity, good crack resistance, no increase in steel consumption, and savings in formwork. Additionally, the absence of formwork support for the cast-in-place floor slab allows for the early installation of large prefabricated concrete partition walls, thereby shortening the overall construction period.

Application Range and Classification

These floor slabs are suitable for buildings with spans up to 8 meters, including hotels, office buildings, schools, residential buildings, hospitals, warehouses, parking lots, and multi-story industrial plants. Depending on the structure of the composite surface, prestressed thin plates can be categorized into three types: ① For composite surfaces that bear low shear stress, no shear reinforcement is required, but the concrete surface should be rough, scratched, or include some bonding holes. ② For composite surfaces that bear high shear stress, in addition to requiring a rough surface, shear reinforcement should be added. The diameter and spacing of the reinforcement are determined through calculations, and reinforcement shapes include waveform, helical, and spot-welded mesh with bent triangular cross-sections. ③ For prefabricated thin plates, a steel truss is added to the upper surface to enhance stiffness during construction and reduce the need for supports under the thin plates.

2. Production Process Introduction

3. Rebar Truss Finished Product (Right Angle)

II. Equipment Performance and Technical Parameters

1.Technical Parameters of Rebar Truss Production Line

1.1 Equipment Overview

The rebar truss production line is a fully automated production line that integrates rebar coil wire laying, straightening, side steel bending, welding forming, automatic cutting, and finished product collection. It can produce rebar trusses for floor slabs as well as prefabricated building PC rebar trusses, widely applied in building construction (prefabricated floor slabs) and high-speed railway construction (double-block sleepers), among other fields.

1.2 Equipment Composition of Rebar Truss Production Line:

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1.3 Equipment Technical Parameters:

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1.4 Equipment Features

1. Rubar laying frame

There are five sets of bar payoff stands, using rotating payoff method, with a maximum load of 2 tons.

Each payoff stand is equipped with independent air braking device.

Each payoff stand has an independent pre-straightening mechanism to remove the oxide scale on the surface of the steel bars.

2. Straightening and Feeding Mechanism

It uses multi-wheel straightening with good straightening effect, without damaging the ribs of the steel bars. Three deceleration motors are used for feeding.

Each feeding mechanism can be controlled independently.

3. Steel Bar Storage Mechanism

It adopts a new type of open storage rack for buffering and storage, which is convenient for continuous production and effectively prevents steel bars from tangling.

4. Terminal Straightening Mechanism

Secondary terminal straightening is performed on the main bar and the web bars before welding and forming. Five-roll straightening is used to ensure the straightness of the finished truss.

This mechanism plays a key role in adjusting the straightness of the truss products.

5. Web Bar Pressing and Feeding Mechanism

Swing-arm bending is used for bending the steel bars, powered by a servo motor, with good synchronization and high stability. Steel bar bending is continuous (the bending mechanism works in a circular and up-and-down swinging motion, without delay), with fast forming speed. The steel bar forming molds have cylindrical surfaces to prevent scratching the surface of the steel bars. The feeding mechanism is powered by a servo motor, with better synchronization and accuracy. With the coordination of the bending mechanism, the perfect combination of the two servo motors can realize the function of changing the truss pitch without stopping, greatly improving the production efficiency.

6. Welding Part

Two spot welders, one on the top and one on the bottom, with two transformers in total. Four lower press rollers with good synchronization.

The welding cylinders have a small stroke, large force, fast welding speed, and high quality.

The welding cylinders use high-quality brands and are air clamped.

The welding electrodes are made of chrome-zirconium alloy copper.

Equipped with positioning mechanism to ensure the shape and size of the welding.

The two-point resistance spot welding method reduces the installation power by 60% compared to peers, and the welding parameters of each welding point can be set independently.

The four-way electrode head can be reused four times, reducing the cost by 3 times.

7. Cutting Mechanism

The "scissor-type" cuttingmode is adopted to effectively solve the problem of open weld caused by cutting process and avoid deformation and distortion of the truss during cutting.

Fast cutting speed, no need to stop welding.

For high-strength cutting at the main and side reinforcement welding joints, the latest developed high-strength and tough mold steel from China is used.

8. Automatic Collection and Stacking Mechanism

The automatic collection mechanism allows continuous production without the need to stop, improving efficiency.

It can collect trusses of different sizes, long and short.

The automatic collection, stacking, and shipping of trusses are all fully automated.

The automated collection and stacking device reduces the number of operators by 2.

9. Electrical Control System

It adopts the control system from Hechuan with high stability.

10. Operating System

Operating buttons and other components use high-quality products.

The equipment is easy to operate and adjust.

Operations such as speed, welding parameters, etc. are convenient.

1.5 Equipment Configuration and Component Brands

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2. Cooling water machine

Cooling water machine length * width * height = 1310 * 630 * 1230mm.

Technical specifications of air-cooled box type chiller unit are as follows:

3. Air Compressor

BK22-8ZG Air-cooled Screw Machine Technical Parameters