Professional Remote Guidance + On-site Emergency Service Rectifies Vibration and Noise Fault

With the rapid expansion of the automotive component stamping industry, servo punch presses are widely adopted for their high precision, adjustable stroke and low energy consumption. A tier-2 automotive parts manufacturer located in Jiangsu placed an order for our 200T servo punch press matched with an HCK-600 three-in-one feeder early this year. The equipment ran stably for 3 months after installation and acceptance. Starting from October 12, the workshop operators reported obvious abnormal vibration and low-frequency rumbling noise during the working stroke of the punch. The vibration amplitude gradually increased, leading to fluctuations in product flatness and triggering occasional automatic alarm of the die protection system. The customer’s production schedule was tight for a batch of new energy vehicle connector shells. Any long-time shutdown would cause delivery delay and penalty risk. Our after-sales service hotline received the fault report at 08:47 on October 12. Following our standardized after-sales response mechanism, the customer service engineer first launched remote video diagnosis within 18 minutes, guided the on-site operator to record running data, check the fixing bolts, observe the vibration position and collect sound and video evidence. After preliminary judgment, the after-sales department arranged a senior field service engineer to depart immediately with a complete set of detection tools, spare bearing assemblies, shock absorption gaskets and torque wrenches. The engineer arrived at the customer workshop at 14:12 on the same day and carried out systematic testing.

During on-site inspection, the engineer used a vibration tester, torque detector and noise meter to collect multi-group operating parameters under different stamping speeds. The core test data are sorted in the table below:

Through layered troubleshooting, the root causes were confirmed: part of the anchor bolts of the punch base suffered loose retightening after long-time alternating impact load; the damping rubber pads under the base were aged and hardened; in addition, the main shaft bearing pre-tightening clearance deviated from the factory setting value, which jointly caused resonance during the reciprocating stamping movement. Our service team implemented a full set of rectification measures on site: lifting the punch frame to replace all aged shock absorption pads one by one, re-leveling the equipment with a precision level gauge, fastening all anchor bolts according to the graded torque standard, disassembling the main shaft housing to adjust the bearing preload clearance, cleaning the lubrication channel and replenishing high-temperature bearing grease, and performing continuous no-load and load test runs. After 4.5 hours of continuous debugging, all indicators returned to the qualified range.

Beyond the emergency repair work, our after-sales team delivered extended value-added services for free for this customer. We provided on-site training for 3 workshop maintenance technicians, covering regular bolt inspection cycles, vibration abnormal identification methods, daily lubrication maintenance points and alarm code query operations. We also customized a personalized periodic maintenance plan and bound the equipment in our cloud after-sales management system. The system will automatically push maintenance reminders before the maintenance cycle expires. We signed a long-term priority service agreement with the customer. In the subsequent 12 months, the customer enjoys priority dispatching of engineers, preferential prices for original spare parts and quarterly free remote health inspection of the equipment. After the rectification, the equipment has run continuously for more than 120 hours without recurrence of vibration and noise problems. The product qualification rate returned to 99.7% as before. The customer’s production plan got back on track smoothly. The customer spoke highly of our fast response ability, standardized operation and comprehensive after-sales guarantee system. This case further proves that our complete after-sales system combining remote pre-diagnosis, rapid on-site support, technical training and whole-life cycle maintenance can effectively eliminate equipment hidden dangers, protect customers’ stable production and reduce economic losses caused by unexpected shutdowns.

Q1: Why did the punch produce vibration and noise after running normally for three months instead of appearing immediately after installation? A1: Servo punch works under periodic impact load. The anchor connection, damping components and bearing clearance will slowly change under repeated impact stress. The deviation accumulates gradually. It will not reach the threshold of abnormal vibration until a certain working cycle. This is a typical delayed hidden danger caused by load fatigue, rather than installation defect.

Q2: Why can’t we only tighten bolts simply to solve this vibration fault? A2: Loose anchor bolts are only one of the inducing factors. The aged damping pad loses the buffering capacity. If we only fasten bolts without replacing the damping pad and adjusting bearing clearance, resonance will still occur under high-speed stamping. The fault will reappear in a short time.

Q3: What is the advantage of your remote pre-diagnosis link in the after-sales process? A3: Remote video guidance can quickly screen simple faults, guide customers to collect key data in advance, help engineers judge the required tools and spare parts before departure, avoid repeated trips, greatly shorten the total fault handling cycle and cut customer waiting time.

Q4: What benefits can customers obtain from your cloud maintenance reminder service? A4: Many enterprises ignore regular maintenance due to heavy production tasks. The automatic reminder system helps customers change from passive breakdown maintenance to predictive maintenance, reduce sudden failure probability and extend the service life of punch and peripheral supporting equipment.

Q5: Is the free technical training part of the standard after-sales service package? A5: Yes, for all our formal customers, on-site operation and maintenance training is included in our after-sales commitment. We aim to help the customer’s internal team master basic judgment and daily maintenance skills and improve the autonomy of equipment management.

Q6: How do you guarantee the traceability of this after-sales service case? A6: All fault videos, test data, repair records, spare parts consumption records and training sign-off forms are archived in our after-sales management platform. The technical team can trace the whole process at any time for subsequent reference if similar signs appear.