ONLINE WEBINAR: APPLICATION OF FARO ARM 3D MEASURING MACHINE IN THE AUTOMOTIVE AND MOTORCYCLE INDUSTRY

Time: 9am – 2pm Friday, September 27, 2024
Format: Webinar – Microsoft Teams

Registration link: //forms.gle/brXgBsA8dzvEFuH26

The webinar shared more information about 3D laser scanning technology, reverse engineering, 3D printing and the application of FARO Arm 3D measuring machine in the automobile and motorcycle manufacturing industry in Vietnam.

Learn more about FARO 3D measuring machines at: //ixox.net/portable-3d-measuring-machine-faro/

Contact information:
TINH HA TRADING & SERVICE CO., LTD
+ Hotline: 0945 275 870
+ Email: [email protected]
Website: //ixox.net

These was a regular activity between Mitutoyo and Tinh Ha – Mitutoyo official agent in Vietnam for timely provided updates on new products.

The training session provided Tinh Ha company’s sales staff and technicians with in-depth understanding of the Digital Height Gage LH-600FG series , thereby confidently advising and guiding customers in using this measuring equipment successfully.

LH-600FG is a high-quality Digital Height Gage with accuracy up to 1.1+0.6L/600 μm, maximum resolution of 0.1 μm, and many outstanding functions for straight measurement, circular measurement, angle measurement and 2-dimensional coordinates measurement.

Mitutoyo’s LH-600 Height Gage series presently running promotional program. To experience our services, learn more about product or get quotes, please contact:

TINH HA TRADING & SERVICE CO., LTD
– Add: 7th Floor, Diamond Flower Building,Le Van Luong St., Nhan Chinh W., Thanh Xuan Dist., Ha Noi City, Vietnam
– Hotline: 0945 275 870
– Email: [email protected]
– Website: //ixox.net/

Following the success of previous exhibitions, this year Tinh Ha’s booth is delighted to welcome a significant number of delegations to visit and learn about the products Tinh Ha distributed.
Tinh Ha displayed a variety of products at this event, including Sumitomo cutting tools, Big Daishowa chuck, Ojiyas measurement gauge, Mitutoyo measuring tools, OSG taps, Union endmill, Zoller presetting machine and Faro 3D scanner.

With the enthusiastic advice of Tinh Ha’s sales staff, our products piqued customers’ interest, and numerous individuals desired to place orders right at the exhibition.
Tinh Ha firm has made more connections with several new domestic and international enterprises, which has further validated the reputation and quality of products and services that our company has delivered to regular customers.

We greatly appreciate your beloved customers interested and attendance at Tinh Ha company’s VIMF 2023 expo. We hope to see you at the Tinh Ha company stand at the forthcoming trade exhibition.

Below pictures reappeared Tinh Ha booth at VIMF Bac Ninh 2023 exhibition:

Tinh Ha Trading & Service Co., Ltd is going to participate in the VIMF-Vietnam Industrial And Manufacturing Fair 2023 in Bac Ninh.

We would like to invite you and your colleagues to visit the VIMF-Vietnam Industrial & Manufacturing Fair^(*) holding alongside VIAF-Vietnam Industrial Automation Fiesta from 08-10 Septmember at Kinh Bac Cultural, Bac Ninh, Vietnam.

VIMF is on a mission to upgrade various local recipient industries. The intention is to introduce know-how & technologies that lead to efficiency, cost savings and increased productivity. Taking directions from the industry 4.0 phenomenon we encourage Industrial digitization of the pro-cess/production value chain.

Tinh Ha confirmed to participate in the VIMF/ VIAF 2023 and we are going to bring the following significant products and solutions:
– Sumitomo Cutting Tool
– BIG Daishowa Chuck System
– Mitutoyo Measuring Tools
– OJIYAS Measurement Gauge
– FARO Portable 3D Laser Scan & Measuring Machine
– ZOLLER Presetting Machine
– OSG Cutting Tool
– Union Tool
– Scan 3D and Reverse Engineering.

We are looking forward to seeing you and your colleagues at our booth number: D154
Thank you and see you soon.

Detailed information about VIMF 2023 Bac Ninh:
– Time: 9:00 �?17:00 from November 8-10, 2023
– Location: Kinh Bac Cultural Center, Bac Ninh City, Vietnam
– Register to visit: +84 2866 861 210
Or Click here: //vietnamindustrialfiesta.com/register-to-visit-vimf-2023/

———————————————–
(*) VIMF – Vietnam Industrial and Manufacturing Fair 2023 –The Industry’s Biggest Manufacturing Show In Vietnam. VIMF is an international industrial exhibition in the form of a roadmap held in the Industrial Complex and connect supplies of machineries, parts, equipment, and process solutions necessary for the automobile, electronics, machinery, textile, footwear, and high-tech industries to related manufacturers. The showcase of VIMF related to Machine Tools and Metalworking, Cutting Tool and Tooling Systems, Welding and Coating, Test and Measurement, Mould & Die, Software and Prototyping, Systems, HVAC, Compressed Air and Vacuum, Material Handling and Storage, General Services, 3D Print For Additive Manufacturing and Supporting Industry.

In order to express gratitude and bring Sumitomo’s high quality cutter to more customers. Sumitomo and Tinh Ha company would like to introduce special promotion of Sumitomo High Feed Cutter DMSW/DMSL: Buy insert Get Free cutter

Details:

• From Dia Cutter 16 to 28: Buy 40 pcs of insert get 1 free cutter
• From Dia Cutter 30 to 50: buy 50 pcs of insert get 1 free cutter
• From Dia cutter 63 to 160: buy 60 pcs of insert get 1 free cutter

The promotion applies from 1/10/2023. Contact us now for more information!

Click here for more product information

Sumitomo Electric Industries, Ltd. (head office: Chuo-ku, Osaka, President: Osamu Inoue, hereafter “our company”) has developed a new high-feed cutter SEC-Sumi Dual Mill DMSL series for high efficiency roughing, with the cutter body and insert (General-purpose G type Chipbreaker) for sale from March 2023, and the Low Cutting Force L type and Strong Edge H type Chipbreakers for sale from May 2023.

In recent years, GX (green transformation) has become a hot topic in the automotive and other industry sectors, leading to increased demands for tools specialized for high efficiency machining which can reduce power consumption and CO2 emissions.

In response to these needs, our company has developed the new SEC-Sumi Dual Mill DMSL series. While the DMSW series, available from June 2021 on, has a lineup of cutters from ø40 to 160mm, the DMSL series has a minimum diameter of ø16mm. This lineup of diverse diameters is applicable to various machining applications in fields including automobiles, aerospace, industrial machinery and molding.

1. Features

(1) Supports high-efficiency machining with ultra-high-feeds and large depths of cut
The complex arc-shaped cutting edge enables optimal cutting angles suited to the axial depth of cut; maximum 3.5mm/t ultra-high-feed machining is realised in areas where depths of cut cannot be increased, and over 1.5mm/t machining with large depths of cut in areas with low feed rates.

(2) Stable long tool overhang machining
Small cutting angle controls cutting resistance towards the back force direction. This enables stable machining without chatter even with long tool overhang.

(3) Realises excellent surface roughness even in ultra-high-feed machining
The complex arc-shaped cutting edge works like a wiper edge to suppress severe deterioration of the machined surface finish even during ultra-high-feed machining.

2. Lineup

(1) Body: Total of 44 Cat. Nos.
・Diameter ø40 to 50mm (Shell type) : Total 6 Cat. Nos.
・Diameter ø16 to 35mm (Shank type) : Total 23 Cat. Nos.
・Diameter ø16 to 32mm (Modular) : Total 15 Cat. Nos.

(2) Insert: Total of 21 Cat. Nos.
・General-purpose G type Chipbreaker
(Grades: ACU2500, XCU2500, ACP2000, ACP3000, ACK2000, ACK3000, XCS2000, ACS2500, ACS3000)
・Low Cutting Force Chipbreaker L type
(Grades: ACU2500, ACP2000, ACP3000, XCS2000, ACS2500, ACS3000)
・Strong Edged H type Chipbreaker
(Grades: ACU2500, ACP2000, ACP3000, XCS2000, ACS2500, ACS3000)

Source sumitool.com

Mitutoyo Vietnam’s training session is exclusively for Tinh Ha’s sales employees, exhibiting the trust, supporting and cooperation between Mitutoyo Vietnam and Tinh Ha. Tinh Ha is now more confident in consulting, supporting, and giving optimal measurement solutions to customers interested in Mitutoyo measuring equipment.

Tinh Ha is delighted to assist customers who are interested in Mitutoyo measuring equipment and to provide the most appropriate and optimal measurement solutions for you.

Please contact us with the following information:

Tinh Ha �?Mitutoyo Authorized Distributor in Vietnam
Hotline: 024 6668 9888 �?0945 275 870 VND
Email: [email protected]

Although EDM (electrical discharge machining) is among the most recent metal processing methods, its earliest application began in the mid-1940s when it was used to remove broken taps and sheared-off bolts from valuable aluminum castings. Rapidly pulsing high-voltage electrical discharges (sparks) were passed across the gap between the electrode and the grounded workpiece, removing taps and bolts from the castings by erosion. Hardened taps were removed without force or extreme heat, leaving the castings unaffected.

On the heels of this simple drilling operation, the second element of EDM processing developed: ram EDM or sinker discharge machining. Essentially identical to EDM drilling, ram EDM added a complex form to the end of the “drill�?electrode, allowing a finished and precise cavity shape to be “machined�?in one action. A third EDM type soon followed. Wire-cut EDM uses a straight wire electrode to cut a vertical or angled slot, as the wire is slowly fed through the cut to maintain a new electrode at all times.

EDM in 2023

Manufacturers typically choose electrical discharge machining (EDM) when conventional machining methods cannot provide a solution. The EDM process uses thermal energy to burn away material from a workpiece to create the desired shape. Although it is not the most commonly-used CNC machining process, engineers turn to EDM whenever hard materials and complex shapes are not conducive to traditional machining.

EDM does not require or employ mechanical force for material removal. Instead, it uses a rapid sequence of electrical current discharges between electrode materials submerged in a dielectric fluid. The electrodes (one being the workpiece) are separated by a spark gap generating extreme electrothermal heat in the spark gap zone. The heat vaporizes portions of the workpiece surface, a process called spark erosion.

Let’s look at the EDM process in detail to discover its two main types, where it’s used, and what benefits it offers:

What are the Two Main Types of EDM Machines?

The two main types of EDM machines are Ram EDM and Wire EDM.

How Does Ram EDM Work?

Ram goes by several names, including conventional EDM, die-sinking EDM, sinker EDM, spark-eroding EDM, and cavity-type EDM. But no matter what you call the process, it works like this: An electrical potential difference is created between the electrode and workpiece, electrically conductive materials, and submerged in a dielectric fluid such as deionized water.

In the Ram method, a graphite electrode (cutting tool) is machined into the mirror image of the desired shape and “sunk�?into the workpiece on the end of a vertical ram. A sinker EDM machine uses electric spark erosion to remove the metal, creating the angles and contours of the part or cavity. The dielectric fluid acts as an insulator until the process reaches a sufficiently high voltage.

The dielectric oil also works like a coolant, removing heat from the piece to prevent excessive thermal expansion. As the oil cycles through a filter, it removes the metal particles and continues through a chiller that keeps the oil below its flash point.

Ram EDM electrode tools, like graphite or copper, must display high melting and vaporization temperatures or high thermal conductivity. The tool materials must also show the ease of fabrication and wear resistance. Cost is another consideration when choosing the material for a tool electrode.

The following are essential factors determining the suitability of a material as an electrode tool in EDM machining:

• Higher metal removal rate
• Lower tool wear
• High degree of electrical efficiency

Although any conductive material can be an electrode material, taking into account the factors and properties for better application in EDM, graphite has been the most popular tool material. It exhibits a relatively low wear rate with a higher degree of electrical efficiency and is inexpensive and easy to fabricate.

How Does Wire EDM Work?

Wire EDM machining is similar to ram EDM, but the electrode is an electrically charged thin wire that cuts the metal part into various shapes. Machining a workpiece using this process also involves submerging it into a dielectric fluid and moving the wire through it to produce sparks as it passes an electric current.

Wire burning produces small chips and high accuracy by melting or vaporizing the material—even hardened steel—instead of cutting it. This so-called wire erosion process slices through metal to create parts deemed unsuitable for conventional machining techniques, and it works well as long as the workpiece has conductivity.

Like ram EDM, wire-cut EDM is another example of non-contact spark machining, during which the wire does not touch the metal. When the wire and the workpiece close, a hot electric charge jumps the gap and melts tiny pieces of the metal.

The wire is continuously fed from a spool and held between upper and lower diamond guides. Since the automatic feeder constantly unspools new wire for use in the machining, as the old wire becomes dull, new wire is there to take its place, so the wire used in this process does not necessarily need to have strong resistance properties.

The guides move in the X-Y plane, but sometimes the upper guide can also move independently, allowing for transitioning shapes, such as circular on the bottom and square at the top. The wire electrode can be programmed to cut complex geometries with excellent surface finishes while holding tight tolerances.

What is Small Hole Drilling EDM?

Although not used as often as wire and ram EDM, hole drill EDM machining is designed to drill small, deep holes with diameters as small as 0.065 mm and depths up to 1m (or 250 times the hole diameter). The electrode and the workpiece are connected to a power supply. After sufficient charge builds up on the electrode to create a high-temperature spark, the electrode vaporizes and erodes the workpiece in a localized area.

The electrode is hollow, allowing dielectric fluid to pass through it, and along with the rotation of the electrode, stabilizes the EDM process and helps remove the workpiece debris. The spark erodes the material as the electrode is rotated and moved down until the hole is complete.

What are the Applications of EDM Machining?

Because they are high-precision machine tools, wire EDM machines are top-rated in the automotive, medical, and aerospace industries. However, they help make prototypes or for full production runs and are often employed in the manufacturing industry for metal components and tools. The EDM process is favored for applications requiring low levels of residual stress.

Here are the three leading industries of EDM machining:

Automotive Industry

The automotive industry requires a manufacturing process for parts with complex shapes using hard materials. Because of this, they favor using wire EDM machines because the process does not rely on mechanical forces that lead to tool wear, and the wire electrode does not need to be stronger than the workpiece. The process works well for making holes and cavities for parts like bumpers, dashboards, and car doors.

Medical Industry

EDM machines produce accurate parts in all medical fields, including optometry and dentistry. They are used to manufacture medical equipment parts and components and medical and dental implants and syringe components without affecting their structural integrity.

Aerospace Industry

Wire EDM produces close-tolerance parts for aerospace part manufacturers. This process benefits parts unable to withstand the high temperature and stress associated with traditional cutting tools. For example, many of these components—engines, turbine blades, and landing gear parts—require accuracy and an excellent surface finish.

Applications Specific to Ram EDM

Ram EDM can create complex cavities, making it particularly useful for fabricating molds, dies, and other types of tooling made from hard materials such as tungsten, carbide, and tool steel. It also works better than conventional machining processes for creating sharp inside corners and deep ribs.

Common ram EDM applications include:

• Dies
• Plastic injection molds
• Deep and thin ribs
• Blind cavities
• Rapid tooling
• Sharp inside corners
• Blind keyways
• Internal splines
• Threads

Is EDM a CNC machine?

An EDM machine is one of several CNC machines like CNC mills, lathes, and routers. Programming a wire EDM, for instance, is much like a two-dimensional milling machine, and the program can start away from the workpiece or in the middle inside a pre-drilled hole. Wire EDMs require an NC G-code program for the geometry, as found in milling (G90, G91, G00, G01, G02, G03).

The differences are in the M-code commands. Wire EDMs have many specialty M-codes specific to wire EDM operations. The most effective method for wire EDM programming is a dedicated software module designed for wire EDM operations. This specialty software provides time-saving processing tools that will not be found in software designed for milling.

What Materials Can Be Machined by EDM?

Any conductive material, including stainless steel, titanium, tungsten, carbide, aluminum, brass, alloys, and superalloys, can be cut using the EDM machining method. Because of its accuracy and capabilities on hardened steel, EDM, specifically the wire-cut technique, has become a popular cutting method in all industries.

What are the Benefits of EDM Machining?

One primary advantage of the EDM process is that the tool electrode (wire or graphite) never touches the workpiece, meaning that it never stresses the part. For example, medical device manufacturers can use EDM to add slots, grooves, and eyelets in machined parts while applying minimal stress.

Another plus of EDM is its high-quality surface finish. The EDM process creates smooth surfaces without burrs while holding tight tolerances. For instance, wire EDM can build very thin eyelets and through-slots in medical devices, which cannot be machined using conventional machining centers.

Other advantages of the EDM method include:

• Manufacturers can use EDM successfully on heat-treated or any hard materials
• An excellent surface finish, up to 0.2 microns, can be achieved
• Because the tool and work do not have contact, mechanical stresses are not developed
• Complex shapes can be reproduced
• Highly accurate
• Economical
• Machining time is not significantly more than the traditional machining process.
• The tool life is extended because of proper lubrication and cooling
• Hard surfaces that are also resistant to erosion can be developed easily on the dies
• EDM works on any material that is electrically conductive

What are the Limits (Disadvantages) of EDM?

The EDM process removes material with electrical charges, which means it’s limited to electronically conductive workpieces and will not work on composite or dielectric materials. Wire EDM cutting may create an oxide layer on the surface of specific metals, so it must be cleaned to maintain optimal quality.

Electric discharge machining is challenged by parts and components that can only be held firmly without compromising the shape. For example, tubular-shaped parts risk being deformed while secured for EDM cutting, causing quality issues.

Other disadvantages of EDM machining include:

• Slower machining times
• Excessive electrode tool wear
• Reproduction of sharp corners might not always be possible
• Metallurgical properties of the material could change from the high heat
• Deep-hole electrodes often need redressing
• Experienced EDM operators are hard to find
• EDM machines consume high amounts of power

In Summary

A quick comparison of sinker EDM and wire EDM reveals their differences:

Sinker EDM uses a graphite electrode tool with a shape machined on the end that is “sunk�?into the workpiece. The movement of this method is mainly along the Z-axis. The dielectric liquid in which the operation occurs is typically hydrocarbon oil. The process is predominately used in mold making.

On the other hand, wire EDM has thin brass wire as its electrode to cut into the workpiece from the side. The movement in this method is along the X and Y axes, and its dielectric liquid is usually deionized water. Wire EDM has numerous applications, with punches, tooling, and dies being high on the list.

As with other CNC machine tools, EDM machines are becoming more intelligent, resulting in devices requiring little or no attention. Most of these changes focus on making the equipment easier to operate or run without an operator.

As things stand now, EDM machining offers various benefits such as high accuracy, good surface finish, and the capability to machine hardened material. However, EDM machining has a few disadvantages, such as slower machining times, that must be addressed when applying EDM machining.

Source: cncmasters.com

Following the success of previous exhibitions, the booth of Tinh Ha Trading & Service Co., Ltd. was among the most outstanding booths in the MTA Hanoi 2022. It drew the attention of many visitors to learn about products and exchange information. During three days of the exhibition, Tinh Ha connected with hundreds of large and small enterprises, both domestic and international. Many of them expressed their desire to become customers of Tinh Ha.

In this MTA exhibition, Tinh Ha Company brought new and outstanding products from big brands such as Sumitomo, Big Daishowa, Mitutoyo, Ojiyas, Faro, Zoller, HPMT �?to the booth. Many visitors showed their interest and impression with our equipment and tools. Not only do these tools and equipment have high precision levels, but they also meet many requirements and can be used for different purposes. Many businesses have found necessary equipment and tools at Tinh Ha’s booth.

Below are some pictures of Tinh Ha’s booth at MTA Hanoi 2022:

Choosing a milling process

Choosing the right milling tool, using rolling cutting in face milling, and using a milling cutter for hole machining when conditions are right, manufacturers can significantly increase production capacity and increase processing efficiency without investing in new equipment, which saves a lot of time and cost.

Milling cutter main angle:

The main declination angle is the angle between the cutting edge and the cutting plane. The main declination angle has a great influence on the radial cutting force and cutting depth. The magnitude of the radial cutting force directly affects the cutting power and the vibration resistance of the tool. The smaller the main declination angle of the milling cutter, the smaller the radial cutting force and the better the vibration resistance, but the cutting depth also decreases.

When milling the plane with square shoulders, select a 90° lead angle. This kind of tool has good versatility and is used in a single piece and small-batch processing. Because the radial cutting force of this type of tool is equal to the cutting force, the feed resistance is large and it is easy to vibrate, so the machine tool is required to have greater power and sufficient rigidity.

When machining a flat surface with a square shoulder, a milling cutter with an 88° main angle can also be used. Compared with the 90° main declination milling cutter, its cutting performance has been improved. Face milling with 90° square shoulder milling cutters is also very common. In some cases, this choice makes sense. The shape of the milled work piece is irregular, or the surface of the casting will cause the depth of cut to change. A square shoulder milling cutter may be the best choice. But in other cases, the standard 45° face milling cutter may benefit more.

When the cutting angle of the milling cutter is less than 90°, the thickness of the axial chip will be smaller than the feed rate of the milling cutter due to the thinning of the chip. The cutting angle of the milling cutter will have a great influence on the applicable feed per tooth.

In face milling, a face milling cutter with an angle of 45° will make the chips thinner. As the cutting angle decreases, the chip thickness will be less than the feed per tooth, which in turn can increase the feed rate to 1.4 times the original. The radial cutting force of the 45° main declination milling cutter is greatly reduced, which is approximately equal to the axial cutting force. The cutting load is distributed on the longer cutting edge. It has good vibration resistance and is suitable for the overhang of the spindle of the boring and milling mac hine. Longer processing occasions. When machining flat surfaces with this type of tool, the blade breakage rate is low and the durability is high; when machining cast iron parts, the edges of the work piece are not prone to chipping.

Selection of milling cutter size:

The diameter of the standard index able face milling cutter is Φ16～�?30mm. The diameter of the milling cutter should be selected according to the milling width and depth. Generally, the larger the depth and width before milling, the larger the diameter of the milling cutter. During rough milling, the diameter of the milling cutter of the milling machine is smaller; when finishing milling, the diameter of the milling cutter is larger, as far as possible to accommodate the entire processing width of the work piece and to reduce the traces of tool connection between two adjacent feeds.

When face milling large parts, they use milling cutters with smaller diameters, which leaves much room for improving productivity. In an ideal situation, a milling cutter should have 70% of the cutting edges involved in cutting. When milling holes with a milling cutter, the tool size becomes particularly important. Compared with the hole diameter, the diameter of the milling cutter is too small, then a core may be formed in the center of the hole during processing. When the core falls, it may damage the work-piece or tool. If the diameter of the milling cutter is too large, it will damage the tool itself and the work piece, because the milling cutter is not cutting in the center and may collide at the bottom of the tool.

Selection of milling method:

Another way to improve the milling process is to optimize the milling strategy of the face milling cutter. When programming surface milling, the user must first consider the way the tool cuts into the work piece. Usually, the milling cutter simply cuts directly into the work piece. This cutting method is usually accompanied by a large impact noise because when the insert is withdrawn, the milling cutter produces the thickest chips. Because the blade forms a large impact on the work piece material, it often causes vibration and produces tensile stress that will shorten the life of the tool.

A better way to feed is to use the rolling cutting method, that is, without reducing the feed rate and cutting speed, the milling cutter rolls into the work piece. This means that the milling cutter must rotate clockwise to ensure that it is processed in a milling manner. The chips formed in this way are from thick to thin, which can reduce vibration and tensile stress on the tool, and transfer more cutting heat to the chips. By changing the way, the milling cutter cuts into the work piece each time, the tool life can be extended by 1-2 times. To achieve this in-feed method, the programming radius of the tool path should be 1/2 of the diameter of the milling cutter, and increase the offset distance from the tool to the work piece.

Although the rolling cutting method is mainly used to improve the way the tool cuts into the work piece, the same machining principle can also be applied to other stages of milling. For large-area plane milling, the commonly used programming method is to let the tool pass through the entire length of the work piece one after another and complete the next cut in the opposite direction. To maintain a constant radial tool intake and eliminate vibrations, the use of a combination of helical lower knife and rolling milling work piece corners usually results in better results.

Mechanics are familiar with the cutting noise caused by vibration. It usually occurs when the tool cuts into the work piece, or when the tool makes a sharp 90° turn while eating. Roll milling of work piece corners can eliminate this noise and extend tool life. In general, the corner radius of the work piece should be 75%-100% of the diameter of the milling cutter, which can shorten the arc length of the milling cutter and reduce vibration, and allow the use of higher feed rates.

To prolong the life of the tool, in the face milling process, the tool should be avoided as far as possible from the hole or interrupted part of the work piece (if possible). When the face milling cutter passes through the middle of a hole in the work piece, the cutter is milled along one side of the hole and the reverse milling is performed on the other side of the hole, which will cause a great impact on the insert. This can be avoided by bypassing holes and pockets when programming the tool path.

Use down milling or up milling:

More and more manufacturers use milling cutters to machine holes in helical or circular interpolation. Although the processing speed of this method is slightly slower than that of drilling, it is more advantageous for many processes. When drilling holes on irregular surfaces, it may be difficult for the drill bit to drill into the work piece along the center line, causing the drill bit to drift on the work piece surface. Besides, the drill bit requires about 10 horsepower for each 25mm hole diameter, which means that when drilling on a small power tool, the optimal power value may not be achieved. Also, some parts need to process many holes of different sizes. If the tool magazine’s tool magazine capacity is limited, the use of milling holes can avoid a frequent shutdown of the machine tool due to tool replacement.

When milling holes with a milling cutter, the tool size becomes particularly important. If the diameter of the milling cutter is too small relative to the hole diameter, a core may be formed in the center of the hole during machining. When the core falls, it may damage the work piece or tool. If the diameter of the milling cutter is too large, it will damage the tool itself and the work piece, because the milling cutter is not cutting in the center and may collide at the bottom of the tool.

To prolong the life of the tool, in face milling, the tool should be avoided as far as possible from the hole or interrupted part on the work piece. When the face milling cutter passes through the middle of a hole in the work piece, the cutter is milled along one side of the hole and the reverse milling is performed on the other side of the hole, which will cause a great impact on the insert. This can be avoided by bypassing holes and pockets when programming the tool path.

By selecting the appropriate milling cutter angle, size and feed method, the tool can cut into the work piece material with minimum vibration and tensile stress, and know under which circumstances milling holes is more effective than drilling, and manufacturers can be highly efficient, Low-cost processing of work piece blanks into exquisite parts.

Source: market-prospects.com