What should be paid attention to in the use of precision engraving machine for knife mould equipment?

The precision engraving machine of knife die equipment is mainly used to process knife die templates (such as wooden boards, acrylics, aluminum plates, etc.), which has the characteristics of high precision and high rotation speed. During the use, it is necessary to focus on the three cores of equipment precision protection, personnel safety protection and processing quality control, and pay attention to the following matters:

Preparation and inspection before processing

Compatibility check of materials and fixtures.

The template to be processed should be flat, free from deformation and cracks, and its thickness should match the processing range of the engraving machine to avoid excessive spindle load caused by ultra-thick materials.

Select a special fixture according to the material (cork/hard aluminum/acrylic) to ensure firm clamping and uniform stress, and prevent the material from loosening and displacement during processing; When clamping, the movement space of the carving tool should be reserved to avoid the collision between the fixture and the tool.

Debugging of Tool and Spindle

Select precision tools (such as flat-bottomed knives, sharp knives and milling cutters) that match the machining requirements, and check whether the cutting edge of the tool is sharp and the handle is intact. It is forbidden to use chipped or bent tools.

When clamping the tool, make sure that the depth of inserting the handle into the spindle chuck is ≥15mm, and tighten the chuck nut moderately. If it is too loose, the tool will slip, and if it is too tight, the chuck or spindle will be damaged. After tool loading, it is necessary to perform tool alignment operation, accurately set the tool origin, and avoid machining dimension deviation.

Start the spindle to idle for 30 seconds, observe whether the rotating speed is stable, whether there is abnormal sound or vibration, and confirm that the spindle is running normally before machining.

Safety inspection of equipment and environment

Check whether the grounding of the equipment is reliable, and whether the emergency stop button and travel limit switch are sensitive and effective; Clean up the sundries in the workbench and surrounding areas, and reserve enough operation and heat dissipation space.

If materials with large dust are processed (such as wood boards and density boards), the dust removal system should be turned on in advance to prevent dust from entering the spindle bearing or electrical components and causing failures.

Operating specifications in the process of machining

Accuracy of parameter setting

According to the material, thickness and tool type, the engraving parameters are set reasonably: spindle speed (soft material 8000~12000r/min, hard material 12000~18000r/min), feed speed and cutting depth, and the principle of "light cutting and multiple passes" is followed to avoid tool breakage or material deformation caused by excessive single cutting depth.

The machining of complex knife die needs to be divided into two steps: rough carving removes most of the allowance, fine carving ensures the machining accuracy, and fine carving needs to reduce the feed speed and increase the spindle speed.

Real-time monitoring of machining state

During the processing, the operator should be on duty all the time, and it is forbidden to leave his post or do irrelevant operations; Closely observe the cutting state of the tool and the material fixation. If there are any abnormalities such as abnormal sound of the tool, loose material and edge collapse on the machined surface, press the emergency stop button immediately to stop the machine for investigation.

It is forbidden to touch the cutter, spindle or processing materials when the equipment is running, so as to avoid mechanical damage caused by the cutter rotating at high speed; It is forbidden to open the equipment protective cover for processing.

Control of cooling and dust removal

When machining metal materials (such as aluminum plates), it is necessary to turn on the cooling system (air cooling or water cooling) to reduce the temperature of tools and materials to prevent tools from overheating and wear or material deformation; Special cutting fluid should be used as cooling medium to avoid polluting equipment and machined parts.

The dust removal system needs to be turned on all the way, so as to suck away the processing dust in time. Dust accumulation will affect the processing accuracy and may also cause electrical short circuit or fire hazard.

Maintenance and maintenance of equipment after processing

Instant cleaning and finishing

After processing is completed, turn off the spindle and dust removal system first, and then cut off the power supply of the equipment; Clean up the waste and dust on the workbench, wipe the fuselage and guide rail with a rag, and keep the equipment clean and tidy.

Remove the cutter, clean the handle and chuck, and store them properly after applying antirust oil; Clean the processed die template to remove residual burrs on the surface.

Lubrication and inspection of moving parts

Fill the moving parts such as machine tool guide rail and ball screw with special lubricating oil to ensure the smooth operation of the parts; Check whether the dust cover of the guide rail is in good condition, and replace it in time to prevent dust from entering.

Check whether the spindle chuck is worn. If the clamping force of the chuck decreases, it needs to be replaced in time to avoid affecting the clamping accuracy of the tool.

Safety protection of personnel and equipment

Operators need to wear special protective articles: wear impact goggles, dust masks, and tight overalls. Long hair should be coiled into the safety helmet, and gloves are forbidden to operate (to prevent gloves from being caught in the spindle).

Regularly overhaul the electrical system, spindle and guide rail of the equipment, set up an equipment operation ledger, and record the processing parameters, faults and maintenance contents, so as to facilitate traceability and optimization of the processing technology.