How to prolong the service life of precision engraving machine of knife mould equipment?

The core of prolonging the service life of precision engraving machine of knife mould equipment lies in reducing equipment wear, controlling operation load and doing daily protection, which needs to be adhered to for a long time from four dimensions: operation specification, maintenance, environmental control and spare parts management. The specific methods are as follows:

Standardize operation and reduce equipment operation loss.

Reasonable setting of machining parameters to avoid overload operation.

According to the machining materials (wood/aluminum/acrylic) and cutter specifications, match the optimal spindle speed, feed speed and cutting depth, and follow the principle of "light cutting and multiple cutting". For example, when machining hard aluminum plate, the spindle speed should be controlled at 12,000 ~ 15,000 r/min, and the single cutting depth should not exceed 0.5mm, so as to avoid the accelerated wear of spindle and cutter due to excessive load.

Over-travel and over-thickness machining are prohibited to prevent the machine tool guide rail and screw from bearing additional stress, causing deformation or precision decline.

Precise tool alignment and clamping to reduce mechanical impact.

Before tool alignment, clean the impurities on the surface of tool and tool alignment instrument to ensure the accuracy of tool alignment; When clamping the tool, the depth of inserting the tool handle into the chuck shall be ≥15mm, and the tightening force shall be moderate. If it is too loose, it will easily slip and damage the spindle, and if it is too tight, it will lead to the deformation of the chuck.

When clamping materials, use a special fixture to ensure uniform stress, and avoid tool jitter and edge collapse caused by loose materials, thus damaging the spindle bearing.

Avoid frequent start and stop and sudden braking.

Minimize the frequent start and stop of the spindle during machining, and the interval between each start and stop is at least 30 seconds to prevent the spindle motor from being damaged due to frequent commutation; It is forbidden to stop the equipment at high speed. It is necessary to reduce the spindle speed and feed speed first, and then stop it gradually.

Fine maintenance, eliminate hidden dangers in time

Regular lubrication and cleaning of moving parts

Core moving parts, such as guide rail and ball screw, should be filled with special machine tool lubricating oil before shift every day, and the dust cover of guide rail should be cleaned every week to remove dust and iron filings to prevent impurities from entering the contact surface of guide rail strain.

The spindle chuck shall be disassembled and cleaned every quarter, coated with rust-proof grease, and the inner wall of the chuck shall be inspected for wear. If the wear is serious, it shall be replaced in time to avoid damage to the cutter and spindle due to the decrease of clamping accuracy.

Special protection of spindle system

When processing materials with large dust (such as density board), turn on the dust-proof blowing function of the spindle to prevent dust from entering the spindle bearing; After the daily processing is completed, let the spindle run for 3~5 minutes without load to take away the internal residual heat and reduce the bearing temperature rise loss.

Every year, professionals are entrusted to carry out dynamic balance detection and precision calibration on the spindle, and the aging bearing sealing ring is replaced to ensure the running stability of the spindle.

Moisture-proof and dust-proof of electrical and control system

Dust the electric control cabinet once a month, check whether the line connector is loose or oxidized, fasten the terminal and replace the aging line; Put desiccant in the electric control cabinet to prevent electrical short circuit or aging of components caused by humid environment.

Back up the parameters of the control system regularly to avoid the abnormal operation of the equipment caused by the loss of parameters.

Maintenance of cooling and dust removal system

When machining metal materials, ensure the normal operation of the cooling system (cutting fluid/air cooling), clean up the impurities in the coolant tank in time, and change the cutting fluid regularly to prevent the tools and workpieces from overheating and deformation.

The filter element of dust removal system should be cleaned once a month, and it should be replaced in time when it is damaged, so as to ensure the efficiency of dust absorption and discharge, and avoid dust accumulation inside the equipment from affecting heat dissipation and motion accuracy.

Optimize the operating environment and reduce external damage.

Control the temperature, humidity and cleanliness of the site

The equipment should be placed in the workshop with constant temperature and humidity, with the temperature controlled at 15~25℃ and humidity at 40%~60%, so as to avoid the corrosion of the spindle and guide rail caused by high temperature and high humidity, or the increase of lubricating oil viscosity and motion resistance caused by low temperature.

The processing area shall be cleaned regularly to prevent dust and sawdust from accumulating at the equipment guide rail and motor cooling port, which will affect the equipment cooling and operation accuracy.

Do a good job in earthquake prevention and corrosion protection of equipment.

The equipment installation ground should be flat and firm, away from strong vibration equipment such as punching machine and air compressor, so as to prevent resonance from damaging the spindle bearing and guide rail; If the vibration of the site is large, a damping pad can be added.

Avoid contact of equipment with corrosive gas or liquid. When processing materials containing acid and alkali components, protective measures should be taken to prevent corrosion of fuselage and electrical components.

Standardize spare parts management to ensure maintenance quality

Use original factory or high-quality accessories.

Wear parts such as cutting tools, chucks and bearings are preferred to be original fittings or high-quality products with the same specifications. It is forbidden to use inferior cutting tools (such as sharp edges and uneven materials) to avoid damaging the spindle when cutting.

Establish spare parts inventory and replace ledger

Store commonly used vulnerable parts (such as chuck, guide rail lubricating oil and filter element) to avoid downtime due to lack of parts when equipment fails; After replacing spare parts, record the replacement time and model in detail, which is convenient for follow-up traceability and maintenance cycle adjustment.