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Enhance manufacturing processes

Release time：2026-03-09

The manufacturing of hoists must strictly adhere to four key stages: design and process preparation, precise fabrication of core components, final assembly and commissioning, and inspection and factory release. Throughout the entire process, stringent process standards and non-destructive testing protocols are rigorously implemented. Material quality control and dimensional accuracy are further strengthened to ensure that the finished products meet the requirements for long-term heavy-load operation and exhibit excellent safety, stability, and reliability.

I. Design and Process Preparation

1. 3D Modeling and Simulation: Perform modeling by integrating operational loads, velocity, and safety factors, and carry out simulations for strength, fatigue, and other relevant aspects to determine the key component parameters and structural standards.

2. Process Route Planning: Clearly define the procedures and inspection points for the entire process, and establish core acceptance criteria for non-destructive testing, precision, load capacity, and other key aspects.

3. Material Control: High-strength, high-toughness steel shall be selected; forged components shall be used for core load-bearing members. All materials must be accompanied by certificates of conformity, and key materials shall undergo re-inspection on a per-piece basis.

II. Precision Manufacturing of Core Components

1. Core load-bearing components: After forging and post-forging heat treatment to relieve stress, these components undergo rough machining, tempering, and precision grinding. Combined with ultrasonic testing, this ensures that they are free of defects and meet the required precision standards.

2. Wrapping of load-bearing components: After thick plates are cut and bent into shape, they are welded. Following welding, stress-relief annealing is performed, and the critical surfaces are precisely machined. Only after the weld seams have passed non-destructive testing can the components proceed to the next stage.

3. Transmission Components: The blanks undergo heat treatment, rough machining, carburizing and quenching, and precision gear grinding. The housing is precisely bored to ensure transmission accuracy and service life.

4. Brake Components: The core components are precision-machined and their accuracy is carefully controlled. The surfaces undergo surface hardening for enhanced durability. After assembly, the actuating components ensure sensitive sealing performance and meet the specified braking torque requirements. The slack-adjusting clearance is also adjusted to comply with the required standards.

5. Hydraulic and Lubrication Systems: Core components undergo precision machining and thorough cleaning. After pipe welding, leak-proof and anti-contamination treatments are applied. Once integrated and assembled, the system ensures adjustable parameters and reliable protection.

III. Final Assembly and Debugging

1. Pre-installation of components: Individually pre-install and debug each core component and system, and identify and rectify any issues.

2. Complete machine assembly: Precisely position and assemble the qualified components, connect the pipelines and ensure proper sealing, and install monitoring sensors.

3. Control System Integration: Complete system wiring and commissioning, and implement closed-loop control for speed, position, and load, as well as various safety protection functions.

IV. Inspection and Factory Release

Geometric accuracy, no-load, rated-load, and overload tests are conducted to verify the performance of braking and safety protection systems. After all indicators meet the required standards, a relevant inspection report is issued, and surface anti-corrosion treatment and packaging for shipment are completed.

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The working principle of a three-roll bending machine.

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The working principle of a three-roll bending machine.

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