How to deal with tool wear?

Tools is arguably the most commonly used key component, and it’s also easy to wear out. How to reduce the tool wear is very important.

Common causes of tool wear:

All components of the cutter will be worn by milling and shaping materials. If one of the components of the cutter is damaged, such as the blade tip, steel body, gasket or snap spring, the entire cutter should be replaced to prevent damage to the relatively expensive tool holder system. Moreover, the replacement of the cutter holder system is more complicated. Therefore, how to reduce the tool wear is very important.

How to deal with tool wear with drill bit grinder

Common tool wear includes the following reasons:

  1. Incorrect installation;
  2. Use components from different manufacturers;
  3. Choose the wrong type of cutter (different type of cutter should be selected for different types of machine);
  4. Milling planer materials are bonded and continuously accumulated on the cutter, which is generally caused by incomplete cleaning;
  5. Insufficient water supply in the sprinkler system inside the casing of milling plane.

Universal Cutting Tool Grinder, Universal Scoring Blade Sharpening Machine, Universal Grooving Cutter Sharpening Machine, Universal Cutter Grinder Manufacturer, Cheap Universal Cutter Grinder, PG-600F Universal Tool Grinder

Universal Tool Grinder PG-600F

How to reduce tool wear?

Tool wear is unavoidable, but can at least be minimized. Adequate water supply is the basic premise to ensure normal rotation of cutter. According to the material selection of milling cutter, can also optimize the use and reduce wear.

  1. Select the suitable working condition milling tool;
  2. Pay attention to daily thorough cleaning;
  3. Regularly check the cutter, and timely find and deal with the wear or damage of components;
  4. Regular maintenance and inspection of sprinkler system;

 

Only through proper maintenance can the wear of key parts be minimized, thus greatly saving cost and ensuring efficient operation of the machine. If the cutter is only slightly worn, a cutter grinder can completely repair the wear. The use of universal tool grinder can reduce the waste of many tools, saving cost and time.

The use and safety management of drill bit grinder grinding wheel

From the transportation and storage of the grinding wheel, the inspection before use for the installation, dressing of the grinding wheel, and the operation of the grinding machinery, any negligence of any link will bury a hidden danger to the drill bit grinder.

 

  1. Grinding wheel inspection

The grinding wheel with cracks and other defects is absolutely not allowed to use. The grinding wheel must undergo strict inspection before it is used.

(1) Visual inspection is to observe whether there are cracks or damages on the surface of the grinding wheel directly with the naked eye or with the aid of other instruments.

(2) Sound inspection is also known as percussion tests. The inspection method is to beat the grinding wheel with a small wooden hammer. The normal grinding wheel is crisp. If the voice is active and hoarse, it will be problematic.

 

  1. Grinding wheel device

Whether the grinding wheel matches the spindle size.

(1) Check whether the characteristics of the grinding wheel meet the requirements of use.

Do not press hard. The matching gap between the grinding wheel inner diameter and the spindle and chuck is appropriate.

(2) Assemble the grinding wheel freely to the spindle of the grinding wheel. Prevent too large or too small. The matching surface should be clean and free of debris.

(3) The chuck of the grinding wheel should be symmetrical. Abundant contact with the front of the grinding wheel and stable clamping prevented the two sides of the grinding wheel from deformation or even fragmentation due to unbalanced force.

(4) A certain thickness of flexible data lining (such as asbestos rubber board, elastic cardboard or leather) should be inserted into the chuck and the end face of the grinding wheel to make the chuck clamping force evenly distributed.

(5) The tightness of the grinding wheel should be tightened enough to make the grinding wheel do not to slide.

 

  1. Balancing test of grinding wheels

For example, the imbalance of the grinding wheel is due to the fact that the center of gravity of the grinding wheel does not coincide with the axis of rotation. The reasons are the defects of grinding wheel manufacture and installation, uneven density of grinding wheel, non-parallel end face, geometric shape or concentricity error of inner and outer holes, eccentricity of grinding wheel device and so on. When an unbalanced grinding wheel rotates around high speed, the centrifugal force which forces the grinding wheel to deviate from the axis will occur, thus causing the vibration of the grinding wheel. The results not only affect the grinding quality, but also accelerate the wear and tear of the main shaft bearing of the grinding wheel. When the centrifugal force exceeds the allowable range of the grinding wheel strength, the grinding wheel will be broken.

 

  1. Dressing of grinding wheels

To prevent passivation, blockage and distortion of grinding wheel, regular dressing can make grinding wheel adhere to good grinding performance and correct geometry. The usual dressing tool is diamond pen.

 

  1. Storage and transportation of grinding wheels

(1) It can not be subjected to strong vibration and impact. The wheels are in transportation and storage. It is not permitted to move the wheel when handling, so as to avoid cracks and surface  to damage.

(2) Signs of characteristics of wheel and safety speed must not be smeared or damaged at will.

(3) The storage time of grinding wheel should not exceed the validity period of grinding wheel. If the storage time exceeds one year, it must be qualified after the rotation test is used.

(4) Grinding wheel storage site should be kept dry. Prevent mixing with other chemicals. Prevent wheel dampness, low temperature, overheating and harmful chemicals from erosion.

(5) Grinding wheels should be based on specifications, shapes and sizes. Prevent overloading damage or cause improper grinding wheel deformation.

How to solve the problem after the bit is broken?

 

 

Cause Solution
Bending, deformation, sliding Increase the rigidity of tool and machine tool, increase the rigidity of workpiece and jig
Lip Relief Angle is too small Regrinding Lip Relief Angle
High Stock Removal To reduce Stock Removal
Bit wear Use drill bit grinder to grinding
Blocking of chips Re-select the alloy bit (chip groove, helix Angle);

Re-select machining method (adjustment of feed rate, step-step method, etc.)

Poor cutting Increase the rigidity of tools and machine tools

Increase the rigidity of workpiece and jig

Predrilling center hole

The cutting plane is first adjusted or processed into a horizontal plane with a guide sleeve

What are the difficulties in drilling stainless steel?

The difficulties of stainless steel material processing mainly include the following aspects:

  1. High cutting force and high cutting temperature

This type of material has large strength and large plastic deformation during cutting, so the cutting force is large. In addition, due to the poor thermal conductivity of the material, the cutting temperature is increased, and the high temperature is often concentrated in the narrow area near the cutting edge, which accelerates the tool wear.

 

  1. Severe work hardening

Austenite stainless steel and some high temperature alloy stainless steel are Austenite structure. These materials tend to be hardened when machined, often several times as much as plain carbon steel. The cutter is cut in the hardened area to shorten the tool life.

 

  1. Easy to stick the tool

Both Austenite stainless steel and Martensite stainless steel have the characteristics of strong and tough chip and high cutting temperature. When the strong and tough chip flow through the front surface of the cutter, the phenomenon of bonding, welding and other adhesion will occur, affecting the surface roughness of the processed parts.

 

  1. Tool wear is accelerated

The above materials generally contain high melting point elements, large plasticity and high cutting temperature, which make the tool wear faster and the tool wear and change frequently, thus affecting the production efficiency and increasing the tool use cost.

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Problems encountered during the operation of the alloy bit and its solution

What kind of material is suitable for what kind of tool?

What kind of material is suitable for what kind of tool?

 

Problem Solution
The front end of the alloy bit is broken Aimed at the bit again
Repair with a drill bit grinder
Improve stability, re-clamp parts, shorten overhang of alloy bit
Check speed/feed
The outer diameter of the alloy bit is worn Aimed at the bit again
Improve stability, re-clamp parts, shorten overhang of alloy bit
Check speed/feed
Repair with a drill bit grinding machine
Oversize/undersize holes To aim at tungsten steel drill bit
To reduce feed
Check speed/feed
The alloy bit is clogged with chips in chip removal tank Increase coolant flow, clean filter, clean bit coolant hole
To reduce feed
Improve stability, re-clamping the parts, shortening the overhang of alloy bit
Check speed/feed
Increase speed
vibration To reduce feed
Improve stability, re-clamping the parts, shortening the overhang of alloy bit
Check speed/feed
A small crack in the cutting edge Repair with a drill bit grinder
Aimed at the bit again
Check the carbide number
Increase speed
Hole asymmetry To reduce feed
Improve stability, re-clamp parts, shorten bit overhang
Check speed/feed
Alloy tool has short life Increase coolant flow, clean filter, clean bit coolant hole
Improve stability, re-clamping the parts, shortening the overhang of alloy bit
Check the carbide number
Check speed/feed

What are the advantages of CVD diamond coated tool?

Chemical Vapor Deposition is called CVD. Diamond coating has many excellent properties such as high hardness, high thermal conductivity, low friction and low expansion coefficient.

In the processing of brittle materials such as graphite and carbon fiber composite materials, it has become the surface coating of cutting tools and has shown excellent performance in improving tool life and processing quality.

The selection of diamond coating thickness is not “the thicker the better”.

How many types of milling cutter according to purpose?

With the improvement in wear resistance, the quality of diamond coating is more important than that of thickness.

After continuous testing and verification of various tool materials, the service life of CVD diamond coated tool is 8 ~ 10 times of that of cemented carbide tool. The allowable cutting speed of CVD diamond coated tool is 2 ~ 3 times higher than that of hard alloy tool.

CVD diamond coated tool has sharp cutting edge and good consistency, low friction factor, and can realize high speed and precision machining of thin-walled graphite mould under high speed and low feed. Meanwhile, the service life of CVD diamond coated tool is longer among many tool materials.

The selection and application of diamond coated tools are mainly based on the properties of workpiece materials and the requirements of machining quality.

Note: When the coated bit is repaired by drill bit grinding machines, the worn coating is irreparable.

Introduction to the hole cutting tools which commonly used in NC machining

Hole cutting tools used in NC machining are:

  • High speed rake angle oil hole twist drill;
  • Helical groove Centre Drill;
  • 3 – flute Solid Carbide Drill;
  • S-type carbide drill bit;
  • Indexable carbide bit;
  • Carbide double edge boring tool;
  • Carbide single edge fine boring tool

In addition, some special industries of NC machining have their own often used hole tool. Such as the printed circuit board industry micro-cemented carbide integrated drill, refrigerator compressor industry integrated cemented carbide precision reamer and step twist drill.

Poly crystalline diamond, PCD, drill bits, HSS bits, High-speed steel, HSS, PCB, solid carbide bits, cutting edge, high-speed steel, carbon-steel bits, high-carbon steel, drill bit grinder

Compared with the tools used in ordinary machine tools, CNC tools have many different requirements, mainly with the following characteristics:

(1) good rigidity (especially rough tool), high precision, low seismic and thermal deformation; Good interchangeability, easy to change tools quickly;

(2) high life, stable and reliable cutting performance;

(3) the size of the tool is easy to adjust, so as to reduce the adjustment time of tool changing;

(4) the tool should be able to reliably break the scrap or roll the scrap, so as to facilitate the scrap removal;

(5) serialization and standardization to facilitate programming and tool management.

 

When your tool is blunt, choosing to use a tool grinder can be very useful. Our drill bit grinder can repair all kinds of tools (drill bit re-sharpener, end mill re-sharpener, screw tap re-sharpener, lathe tool grinder, saw blade sharpener, universal(all-purpose) cutter grinder, universal(all-purpose) tool grinder, chamfer, air tapping machine, gear chamfering machine, universal(all-purpose) head, rotary table, etc. ). If you want to buy our products, please send us your requirements and cutter parameters first. We will help you choose the corresponding model.

What are the machining methods of thread?

Thread cutting

Generally refers to the use of forming tools or grinding tools in the workpiece thread processing methods, mainly including turning, milling, tapping, thread sleeve, grinding and whirlwind cutting.

When turning, milling and grinding threads, the drive chain of the machine tool ensures that the tool, milling cutter or grinding wheel move a guide path accurately and uniformly along the workpiece axis at each turn of the workpiece. In tapping or threading, the tool (tap or die) rotates relative to the workpiece, and the tool (or workpiece) is guided axial by a threaded groove formed first.

The forming tool or thread comb tool can be used to cut the thread on the lathe. Because of the simple structure of the tool, it is a common method to produce single and small batch of threaded workpieces. Using the thread carding tool to cut the thread, the production efficiency is high, but the tool structure is complex, only suitable for the short thread workpiece of turning fine teeth in medium and large quantity production.

The pitch precision of turning trapezoid thread can only reach 8~9 grades (JB2886-81).

The productivity or precision of machining threads on a specialized threaded lathe can be improved significantly.

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How to reduce the abrasion of drill bit?

The drill bit is arguably the most commonly used key component, and it is easy to wear out. How to reduce the abrasion of drill bit is very important?

 

What is abrasion?

The wear caused by the two components squeezing each other and causing relative motion.

For example, between the tool tip and milling and planning materials. In the process, tiny particles on the surfaces of the two components are detached from the elements.

Common causes of tool wear:

All components of the tool are more or less worn by milling and planing materials.

If a single component is damaged, such as blade tip, steel tool body, gasket or spring, the entire tool should be replaced. This prevents damage to the relatively expensive tool holder system, and the replacement of the tool holder system is more complex.

 

Common tool wear includes the following reasons:

  1. Incorrect installation;
  2. Use components from different manufacturers;
  3. Incomplete cleaning: milling and planing materials on the tool plate and continuous accumulation;
  4. Choose the wrong tool (different type of machine should choose different type of tool);
  5. The sprinkler system in the housing of the milling and planing drum is short of water supply.

How to reduce tool wear and tear?

Tool wear is not entirely avoidable, but it can be minimized.

  1. Sufficient water supply is the basic premise to ensure the normal rotation of the tool.
  2. Select the right tool according to milling and planing materials, which can also optimize the use and reduce wear.
  3. Pay attention to daily thorough cleaning;
  4. Regularly check the tool, and timely detect and deal with the wear and tear or damage of components;
  5. Regularly maintain and inspect the sprinkler system;
  6. Select milling tools suitable for working conditions.

Correct installation to reduce wear and tear:

  • Before installation, check whether there is any foreign matter in the inner diameter of the tool holder and confirm whether cleaning is necessary.
  • Use proper tools (copper hammer or pneumatic insert tool) to prevent damage to the tip.
  • Manually check the tool rotation (turn the tool by hand).
  • Only proper maintenance tools can minimize the wear and tear of key components.

This greatly saves the cost and ensures the efficient operation of the machine. In the daily maintenance, we recommend our drill bit grinding machine. This tool can be used to repair your drill bit in case of wear and tear. Allow your drill to be reused and the life of the drill is increased, and your money is saved.

How to select the attachment of universal tool grinder for different cutting tools grinding?

PG-600, PG-600F, PG-6025 are universal tool grinder from PURROS Machinery, which can be used for widely cutting tools sharpening, such as peripheral cutting edge of end mill, side cutting end mill, arc cutting tools, R-type cutter, Ball-type cutter, R-type lathe tool, tapered end mill, gun-drill bit, deep hole drill bit, regular drill bit, step drill, screw tap, chamfer cutter, end mill, shaft, regular turning tool, CNC lathe tool, lathe roughing tool, planed cutting tool, lathe tools at all angles, hobbing cutter, circle cutter, circular forming cutting tool, and also can be used for cutter fixed center.

For grinding attachments, the models are: 50D, 50E, 50Q, 50K, 50S, 50C, 50H, 50B
For selecting the attachment to match grinding tools, there are some issues for each user, so now, PURROS Machinery list all of details as below:

 

Universal Tools Grinder, Universal Cutting Tools Grinder, PG-600 Universal Cutter Grinder, Cheap Universal Tool Grinder, Universal Tool Grinder for Sale, Universal Tool Grinder Manufacturer, Universal Tool Grinder Supplier, Universal Tool Grinder Wholesaler, Universal Tool Grinder Exporter

PG-600

Universal Cutting Tool Grinder, Universal Scoring Blade Sharpening Machine, Universal Grooving Cutter Sharpening Machine, Universal Cutter Grinder Manufacturer, Cheap Universal Cutter Grinder, PG-600F Universal Tool Grinder

PG-600F

Universal Cutter Grinder, Universal Cutting Tool Sharpener, Universal Drill Bit Grinder, Drill Bit Grinder, PURROS PG-6025 Universal Tool Grinder Manufacturer, Best Universal Tool Grinder Online, Cheap Universal Grinder Sharpening Machine

PG-6025

Optional
Attachments
PURROS end mill grinding attachment 50D 50D Attachment
Used for front face and peripheral cutting edge of end mill, side cutting end mill, etc.
Grindable range: φ3-28;
Shaft model of end mill: straight, MT 4
Grindable Tools End Mill
PURROS end mill grinding attachment 50E 50E Universal Attachment
Including the all the functions of 5D, besides, arc cutting tools, R-type (Ball-type) cutters, R-type lathe tools, tapered end mills, etc.
Grindable range: φ3-28;
Shaft model of end mill: straight, MT 4
End Mill Supplier, Cheap End Mill for Sale
PURROS end mill grinding attachment 50Q 50Q Attachment
Used for Gun-drill Bits & Deep Hole Drill Bits, adopted 6-jaw chuck design to ensure accuracy of the center.
Grindable range: φ4-33;
Drill Bit for Deep Holes
PURROS end mill grinding attachment 50K 50K Attachment
Used for drill bits, step drills, screw taps, chamfer cutters, end mills, shafts, etc.
Grindable range: φ3-50;
Drill Bit, Step Drill Bit, Screw tap, Chamfering Cutter, End Mill, Side Cutting Tool
PURROS end mill grinding attachment 50S 50S Attachment
50S is a 3-jaw chuck attachment, and with a high-speed motor; Also it is a universal attachment.
Grindable range: φ3-100;
Metal Cutting Tools
PURROS end mill grinding attachment 50C 50C Lathe Tool Attachment
Used for regular turning tools, CNC lathe tools, lathe roughing tools, planed cutting tool, and lathe tools at all angles.
CNC Lathe Tools
PURROS end mill grinding attachment 50H 50H Universal Attachment
Used for side cutting end mill, hobbing cutter, circle cutter, and circular forming cutting tools.
hobbing cutter
PURROS end mill grinding attachment 50B 50B Fixed Center Attachment
Used for all of tools needs to be fixed center with other attachments during grinding.
Base of Universal Tool Grinding Machine Machine Base (Also Tool Cabinet)
It is a special and multipurpose machine base, which can be place the grinder, and tools and machine parts can be collected in the cabinet, etc.
Universal Tool Grinding Machine with the Base