Dans l'industrie de la fabrication de fixations, le pliage de longs boulons après un traitement thermique est un problème universel. Traditionnel “martelage manuel” est non seulement inefficace, mais ne parvient pas non plus à garantir une précision constante. This article shares a specialized Solution automatisée de redressage des boulons: démontrant comment l'automatisation a aidé un client indien à passer d'un “8-manuel de la personne” à un “une personne, multi-machine” modèle de production tout en atteignant constamment une rectitude à moins de 0,1 mm.
What is the Bolt？
Bolts are foundational fasteners for the machinery, construction, et l'industrie automobile. The typical workpiece for this solution is a high-strength long bolt: 15mm diameter, 340mm length.
Structural Features and Challenges
- High L/D Ratio: The 340mm length makes the bolt highly susceptible to an initial bend of 0.5mm – 1.5mm after heat treatment.
- Precision Requirements: While the client required straightness within 0.2mm, this solution consistently achieves under 0.1mm.
- Protection Requirements: The straightening process must ensure zero damage to thread precision and surface quality.
Why Bolt Straightening Must Move Away from “Manual Hammering”
Traditional Process vs. Automated Solution
| Point douloureux | Manual Hammering / Manual Press | Automated Straightening Solution |
| Labor Requirement | 8 Workers (shift rotation) | 1 Operator for 4 Machines |
| Rectitude | 0.2mm – 0.5mm (unstable) | ≤ 0.1mm (extrêmement stable) |
| Cycle Time | 120 – 180 secondes / piece | 10 – 15 secondes / piece |
| Overall Cost | Massive financial and labor drain | Labor costs reduced by over 90% |
Automated Bolt Straightening Process Flow
This solution covers a full closed-loop automated process from feeding to sorting, ensuring every bolt meets high-standard delivery requirements.
Core Process Descriptions
- Auto-Feeding: Bent bolts are automatically fed from a hopper into the straightening station without human intervention.
- Dynamic Measurement: High-precision sensors scan the rotating workpiece in real-time, accurately capturing the maximum bend point across the entire length.
- Servo Pressing: The smart system automatically calculates spring-back based on the material (carbon steel/alloy steel), and the servo ram applies precise pressure for a single-pass correction.
- Auto-Sorting: Qualified bolts proceed to the next stage, while non-conforming parts are automatically isolated, ensuring a 100% yield rate.
Machine à redresser les boulons UBJ-80
Ce lisseur est idéal pour les pièces finies traitées thermiquement (par ex., composants de machines d'estampage/de bureau, pièces auto/moto, outils, vis) et des barres (acier, cuivre, aluminium, acier inoxydable, alliage de titane) de 60 à 600 mm de longueur & Diamètre φ3–φ25 mm. Il améliore à la fois la précision et la qualité du produit.
Défis et solutions du redressement de base
Challenge 1: Achieving the “1 Operator for 4 Machines” Efficiency Revolution
Description du problème: Traditional Indian fastener factories rely on cheap labor, which leads to management chaos and low yield rates.
Solution:
Our solution implements full closed-loop automation. The operation logic is extremely simple, with built-in recipes for various bolt specifications. A standard worker only needs to refill the hopper periodically; the rest—measurement, redressage, and inspection—is handled automatically by the machine. This solves labor shortages and eliminates precision drops caused by fatigue.
Challenge 2: Guaranteeing Consistency within 0.1mm Precision
Description du problème: When a bolt is subjected to hammer strikes, internal stress distribution becomes uneven, often leading to over-correction in localized areas.
Solution:
The solution utilizes a fully parameterized servo control system. Unlike vague human judgment, sensors detect the bolt’s axial curve with micron-level accuracy. Through multi-step servo algorithms, the system precisely overcomes the elastic spring-back of S45C or alloy steels, locking the final straightness within 0.1mm.
Cas de fabrication: The Indian Client’s Fourth Choice
Contexte du client
A well-known Indian fastener supplier providing components for global construction machinery brands.
Résultats de la mise en œuvre
- Repeat Orders: Based on the outstanding performance of the first three units, the client recently purchased their 4th machine.
- Massive Cost Reduction: Currently, one operator manages all 4 machines, increasing production efficiency by more than 10 fois.
- Quality Benchmark: Bolt straightness improved from 0.2mm to under 0.1mm, helping the client secure more high-end international contracts.
FAQ
- Q: Will the straightening ram damage the bolt threads?
- Non. We have designed non-contact, cushioned protection molds specifically for bolt straightening. The press blocks match the bolt’s curvature perfectly, ensuring even force distribution and avoiding surface indentations.
- Q: Can the equipment integrate into our factory’s MES system?
- Oui. Our control system features standard data interfaces to record and export real-time straightening data for every bolt, meeting modern traceability requirements.
Summary
For fastener factories pursuing high efficiency and quality, an Solution automatisée de redressage des boulons is the essential path to increased competitiveness. Whether it is to cut labor costs by 90% or to achieve 0.1mm delivery precision, automation technology provides the most stable return on investment.
If you are facing labor management issues or precision bottlenecks, feel free to Contactez-nous for a customized technical proposal.