Choosing a suitable CNC machine shop can be a daunting task, especially if you’ve not done it before. It’s not just the matter of who delivers the best; the selection process also involves hiring a shop that delivers exactly what you want, faster.

Plus, there are hundreds of CNC machine shops littered across the continent – which could further complicate the entire hiring process. While initial research like references and testimonials might help, there is a lot that is needed to judge a machine shop’s performance.

If you are confused about what to look for in a precision machine shop, here are a few tips to save the day.

Hiring a Precision CNC Machine Shop: A Checklist for Entrepreneurs

Here is a list of the things that can make your CNC machine shop hunt easier.

●  ISO Certification
You can begin the search by filtering out the shops with ISO Certification. The quality management label simply states your shop is equipped enough to provide you the quality machined parts you are looking for.

●  Experience
Next comes the relevant experience the shop comes with. While machining startups are great on their own and could definitely meet your expectations, you might be looking for machinists or shops that have relatively greater experience working with the same industry domain as yours. Chances are they have already delivered order types and sizes similar to your requirement.

●  Machining Capabilities
Machine shops that come with extensive engineering, design, and manufacturing capabilities are always safe to hire. This way you can ensure they’ll be equipped to resolve any technical or product-based limitations that might arise during the machining and manufacturing process. This also guarantees you’ll receive your order on time if all goes well.

●  Variety of Equipment
A machine shop, however small, comes with solid numbers of equipment. They may not be the latest ones – in case of shops that are just starting or the ones on the stage of obsoletion. But, there are many that boast new-age cutting tools and machining equipment. You may choose them solely based on the order size and the precision needed.

●  Offers Prototypes/Sample pieces
Product sampling is very crucial when dealing with large-scale production. However, there are many shops still that don’t offer sample manufactured pieces or prototypes of the design, which might cause production delays and dissatisfaction. Simply eliminate these types of shops from your CNC hunt.

●  Customer Services and Support
CNC machining and manufacturing is more than just shaping raw materials into precision CNC machined parts; it’s also about how the shop deals with the customer requirements. What is the process they follow? Are they transparent in their approach? What is their workforce like? How do they deal with customer queries? In short, acute customer services is crucial in every industry, including in the CNC environment.

Things To Remember Before You Place An Order

So, you have shortlisted a CNC machine shop you deem fit for your requirement. Next comes actually placing an order with them. Wait…

Before you click on the ‘Request A Quote’ button, be sure to check everything. What is the quantity you looking for and can your shop help you with it? And most importantly, what is your requirement, exactly? You don’t want to cause production delays due to material or tolerance shortcomings, do you?

●  Do you have alternatives for the material type you’ve selected?
It’s possible the shop cannot fetch CNC machining material you’ve chosen on-time. Or it could be very expensive, thereby, increasing the production cost. Anyway, having an alternative always helps in long-run.

●  Are you specific with your tolerances?
You need to specify accurate measurements for precision and quality purposes, obviously.

●  Do you know how the product will be developed?
This is considering you’ve done the custom part design yourself. Not considering how it will be developed while designing can lead to an increase in production costs.

Following the tips mentioned above can help you experience smooth and super-productive CNC machining!

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Here at Machining Design Associated Ltd., we offer top of the line CNC machining services to businesses across all industry verticals. For more information, fill up the form here.

The world of Computer Numerical Control (CNC) is extensive. Precision machining is at an all-time high. We get introduced to a new functionality every other week, thanks to all the advancements happening in the tech space. Hand-held lathe gave way to automated lathes, and in another few decades, we’ll have AI directed lathes (those days aren’t far, folks!).

In this post, we’ll be discussing one such innovative offering to the CNC world – Swiss Screw machines. Powerful counterparts that take care of smaller and much complex CNC machined parts, so you can use up your lathes for much larger and extensive parts.

What is a CNC Swiss Screw Machine?

Originally from Switzerland, Swiss screw machines can be best described as a type of automated lathe capable of handling both CNC turning and milling.

The concept of Swiss Screw Machines is nothing new – it was first used in the 1800s, the collet chuck getting patented in the 19th century (1870s). 1960 saw Swiss screw machines gaining its momentum. The first CNC Swiss Screw machine was introduced in the late 1970s, and a decade later, they found their niche in the electronics industry. This machine type is also popular amongst Swiss watchmakers.

Swiss Screw machines are much sophisticated now. Improved designs, servomotors and CNC controls, have given today’s Swiss machines and operators much more liberty to produce highly-precise and complex parts faster, better. They are now widely used in preparing CNC machined parts for medical and aerospace applications – industries that cannot afford imprecise components.

Swiss screw machines are designed to handle both turning and milling, which enables us to produce cent percent perfection in one sitting. In this machine type, the workpiece moves in place of the cutting tool. This process is quite similar to conventional lathe – just, unlike lathe, Swiss lathe have a flexible headstock that moves back and forth (z-direction) along with the bar.

Advantages of Swiss Screw Machines

Swiss Screw machines have a lot to offer, apart from its ability to produce much smaller machined parts. This machine type drives all of its benefits out of its tools, uniquely placed geometry, and mechanics.

Listing a few outstanding ones below:

  • They have a very compact design – with all their parts (tools included) placed in proximity. This reduces the chip-to-chip time from one tool to another to a mere second or less.
  • Operation time in a Swiss machine is relatively lower than its lathe counterpart. They are flexible enough to perform several operations at one time with as many as five tools working together.
  • Swiss Screw machines have this extensive tool zone that can hold up to 20 tools. This number may vary depending on the machine type. The high-end machines may also contain tool changers.
  • They boast perfect surface finish, eliminating the need for an extra involving it.
  • Swiss Scre machines are fit to perform every other secondary operation – milling, drilling, sawing and what not.
  • Setup time is relatively shorter in case of Swiss Screw machines.
  • Fast cycle times and flexibility without compromising quality.

Why You Should Choose Our Swiss Screw Machining Services

At Machining Design Associated Ltd., we provide precision CNC Swiss screw machining services. We have a five-decade-long experience in handling orders of all types and varieties.

We provide quick quotes. Contact us with your requirements today!

 

Right materials make the best applications.

Material selection is a crucial step to get your CNC project right. Think of it as assembling a Subway meal based on your diet plan; you add meats if your diet chart asks for more protein, and greens for a vitamin fulfill. Similarly, selected materials must cover your design prerequisites— hardness, rigidity, thermal stability, and chemical resistance just to name a few. And your budget as well, of course.

Material characteristics are especially important when you require high precision CNC machined parts with complex designs. For instance: amorphous materials like metallic glass and polymers generally hold tighter tolerances than, say, aluminum.

In the following article, we will elaborate more on material types, their characteristics, tips and guidelines on choosing the right materials, and more. Let’s start with the basic: the material selection process.


CNC Materials Selection Process

If you’ve decided to jump the CNC machining wagon, have a valid prototype handy and your budget figured out, it’s time to select the best suitable materials for your project. The basic three steps to material selection are:

Step 1. Define your material requirements: Based on your design, make a high-level list of material prerequisites. Do you need a malleability? Or perhaps a sturdier material? Laser polishing for a surface finish? Consider all the mechanical, physical, environmental, and budget factors.

Step 2. Pin down qualified materials: Identify potential candidates that fulfill your material requirements. Notice, we’re are focusing on ‘candidates’ not ‘candidate’. There’s a solid reason behind it. Have a look:

Here’s what Ronald E. Giachetti, of National Institute of Standards and Technology, wrote in his paper on Manufacturing Process and Material Selection During Conceptual Design:

“The material and manufacturing process selection is performed early in the product development process. At this stage, it is inappropriate to select a single material or process without evaluating all the alternatives. The selection of sets of possible candidate materials and processes allow for greater flexibility in the product development process. The more alternatives, the greater the manufacturing flexibility.”

 Hack:  Make sure you approach readily available materials— it’ll help cut costs and efforts. 

Step 3. Now, select the most appropriate material: The third step is the final showdown: choosing the material with maximum functionality in minimum costs. Or, the materials that check most on your prerequisites list.

In the next section, we will talk about the most popular materials and their properties.


CNC Material Selection- Guidelines


Metals
Most common metals in the CNC machining universe are:

1. Aluminum
Most popular of the bunch; used for both mechanical and aspect components.
(a) Physical properties:
● Medium physical strength (<500 MPa) (Note: Aluminium 7075 is one of the strongest metals at >500 MPa; but it’s a bit pricey)
● Corrosion resistance
● Temperature resistance (<400°C)
(b) Mechanical properties:
● High machinability. Can be machined quicker than other metals
● Readily available; inexpensive
(c) Industries:
● Automotive ( gears and shafts etc.)
● Aerospace (aircraft fittings etc.)
● Healthcare (medical equipment)
● Consumer electronics (electronic housings)


2. Cold Rolled Steel

(a) Physical properties:

● High physical strength (Increases the strength of the finished product by 20%)
● Provides perfect precision as it creates smaller products
● Can handle tighter tolerances
(b) Mechanical properties:
● Medium machinability.
● Moderately expensive
(c) Industries:
● Manufacturing (Machinery parts)
● Aerospace (aircraft fittings etc.)
● Construction
● Consumer electronics (electronic housings, Jigs & fixtures)


3. Stainless Steel

(a) Physical properties:
● Hardness
● Chemical resistance
● High strength (>500 MPa)
● Temperature resistance ( Very high >500°C)
● Corrosion resistance
(b) Mechanical properties:
● Good machinability
● Inexpensive
(c) Industries:
● Automotive
● Aerospace (aircraft fittings etc.)
● Healthcare (surgical equipment)
● Consumer electronics (electronic housings)
● Food Industry
● Marine applications
● Chemical Processing
● Marine applications


4. Brass

Used for high volume applications.
(a) Physical properties:
● Medium strength
● Natural Corrosion resistance
● Low-Temperature resistance (<250°C)
● High tensile strength
(b) Mechanical properties:
● High machinability.
● Readily available; moderately expensive
(c) Industries:
● Automotive ( mechanical parts, valves & nozzles)
● Architecture
● Healthcare (medical equipment
● Consumer goods
● Electrical hardware


Exotic alloys

1. Inconel

(a) Physical properties:
● Temperature resistance
● Corrosion resistance
● Medium strength
(b) Mechanical properties:
● Moderate machinability
● Moderately expensive
(c) Industries:
● Automotive
● Aerospace
● Healthcare
● Consumer electronics


2. Copper

(a) Physical properties:
● Highest electric conductivity
● High corrosion resistance
● Thermal conductivity
● Low chemical resistance (especially to acids, halogens sulphides, and ammonia solutions)
(b) Mechanical properties:
● High machinability. Can be machined quicker than other metals
● Readily available; moderately expensive
(c) Industries:
● Automotive (cooling systems and heat exchanger, valves and radiators etc)
● Aerospace Healthcare (medical equipment)
● Consumer electronics (electronic housings)

Outside of this wide range of metal materials, it’s also possible to use plastics, wood, and even fiberglass and foams with CNC machining technology.


Plastics


1. PVC

(a) Physical properties:
● High strength
● Corrosion resistance
● Temperature resistance
● Chemical resistance
(b) Mechanical properties:
● High machinability
● Readily available; inexpensive
(c) Industries:
● Automotive
● Aerospace
● Healthcare
● Consumer electronics
● Food Industry
● Chemical


2. Nylon

(a) Physical properties:
● High physical strength
● Good impact strength
● High corrosion and abrasion strength
(b) Mechanical properties:
● High machinability. Can be machined quicker than other metals
● Readily available; inexpensive
(c) Industries:
● Automotive (insulators, bearings)
● Aerospace
● Healthcare
● Consumer electronics

 

Now that you know about different materials, you can select the ones that best suit your CNC project. We, at Machining Design Associated Ltd., offer exceptional CNC machining parts with desired tolerances. Get in touch to know more!

CNC milling is one of the most popular CNC machining processes. Milling incorporates the technical aspects of both drilling and cutting processes; CNC milling uses a rotating cylindrical cutting tool just like in drilling. But, unlike the single axis motion of the latter, the cutter and workpiece in a milling machine can move along three, four and even five axes allowing it to produce shapes, holes and slots with tight tolerances. In addition, the workpiece is often moved across the milling tool in different directions, unlike the single axis motion of a drill.

However, multi-axis functionality isn’t the only unique thing about Custom CNC milling. In this article, we will be exploring some of the major/minor facets of the machining type including main components, CNC mill types, advantages with CNC milling and more.

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CNC Milling Machine- Main Components

Custom CNC Milling

Let’s first familiarize ourselves with the critical components that comprise a CNC Milling machine.

1. Control panel: Control panel is the brain of a CNC milling machine. The machinist/controller feeds the G-code (required dimensions) using the keyboard which, in turn, instructs the axis motors to move the cutters and other components.

2. Table: The table is used to hold the workpiece stationary for the entirety of the milling process. The workpiece is fit to the metal/wooden/plastic table using T-slots and metal clamps.

3. Column: The columns run along the axis to give a backbone to the milling part.

4. Cutting tool: A cutting CNC machine tool is attached to the column. It moves across the axis to give the desired shape to the CNC machined parts.

5. Frame: As the name suggests, the frame gives sturdy support to the machine, providing them with maximum rigidity to withstand cutting forces. It is mainly built using cast iron.

6. Axes: The axes in a CNC milling machine allows cutting tool/workpiece to move around obtain the maximum possible precision.

7. Spindle: The spindle consists of a rotating assembly that holds the cutting tool and a motor that runs the entire workpiece.

8. Coolant supply tube: The coolant supply tubes are used to cool down the rapidly heating metal workpiece and to lubricate the cutting tool for smooth movement.

 

There are two types of CNC milling machines available with respect to its working- Vertical and Horizontal- with the major difference being in their spindle placement.

  • Vertical CNC Mills
    Vertical CNC milling machines have a vertical spindle axis. In this machine type, the cutters are placed vertically in the spindle and are able to make drilling or plunge cuts. Popular examples of Vertical CNC mills include Bed mills and Turret mills.
  • Horizontal CNC Mills
    In horizontal CNC milling machines, the cutters are placed horizontally on an arbor.


Here are a few features of a CNC Milling machine that makes it an ace in the CNC manufacturing industry.

1. Safety– Custom CNC Milling process is about 10x faster and safer than traditional milling machines’. With computer systems handling everything, there is minimal contact between the machines and the operators. The operator feeds in the codes and the machine is directed to produce custom machined parts with tight tolerances. The manual work is reduced by a multifold and the chances of human error is next to nothing.

2. Accuracy – CNC milling machines are notorious for producing guaranteed accuracy all thanks to its next-gen features and innovative working. Tight tolerances are no big deal with CNC milling machines.

3. Versatility – CNC milling machines are not limited to producing machined parts out of one material type. From metals to industrial plastics and alloys, almost every material type can be used with a CNC milling machine that too without compromising on the quality front.

4. Lower Overhead Costs – With a severely automated process in place with CNC milling machines, you save a huge chunk of machining and manufacturing costs which you can use in any other development facet.

Here at Machining Design Associated Ltd., we offer top of the line CNC milling services to businesses across all industry verticals. For more information, drop us an email at machiningdesign@mdaltd.ca or fill-up the form here.

 

The Machining world is growing at an unbelievable pace. Handheld machines have advanced to highly sophisticated computerized machines (CNC) and use CNC machining to produce machined parts. Similarly, basic 2,3-axis CNC machining have now led on to a more improved, more like 5-axis CNC machining. While expensive, 3+2 axis and 5-axis machining processes are now a staple in almost every CNC machine shop. It’s imperative that both large-scale and small and medium manufacturing units are utilizing the one and many benefits of this machine type – who is going to pass the opportunity to get better productivity, higher accuracy at much lower costs (leaving the initial set-up cost, of course). In this article, we will cover benefits of 5 axis CNC machining.

But, there is more to 5-axis CNC machines than just that. Ready to find more?

1. Heightened Accuracy, Efficiency & Cost Effectiveness: Sophisticated Machines

First on our list is, obviously, the points we mentioned before. There is a reason why machinists are fond of this machine type, even with complex processes and all. 5-axis machining is the more efficient, accurate, and improved of all its counterparts, here’s everything you need to know about 5 axis cnc machining. Owing to less fixturing at multiple operations, using it directly translates to better work-piece quality and durability. This means good parts, less wastage, lower tooling costs, and shorter working duration.

2. Complicated Shapes, Angles Made Possible

With its ability to reach even the most complicated of angles, five-axis machines serve as a savior to all those looking for more complex 4D and 5D parts. Something we would never be able to achieve with your regular 2 axis, 3 axis machines. That too in a single setup, all thanks to its structure which makes it possible to reach out to both sides at one-sitting. All these things translate to better productivity and improved work-piece quality.

3. You Can Make Use of Shorter Cutting Tools

Shorter cutting tools are a mess to handle, especially with your general CNC machines. Thankfully, we are fully able to utilize the power of better tooling angles, better cutting speed, and precision parts with these tools as they can be fit well to a 5-axis machine. Here, you can have the head oriented towards the job and the cutter towards the surface. As the machine holds the tool well, the load on the cutter is reduced, resulting in decreased unfortunate breakages and vibrations.

4. Improved Drilling Process

5-axis machining is an absolute blessing for the drilling process, drilling of holes. This is due to its ability to reach smaller and more complex angles (see point no. 2), giving a much cleaner finish. On the contrary, with 3 axis machines, you have to set up separate sitting for every angle. Which, of course, is both time-taking and cost engaging?

5. They are Compatible with CAD/CAM

This compatibility brings better execution to the planned designs. You are now able to achieve even the most complex of structures, quite easily. Plus, this mix has engaged a lot of job opportunities in the sector. All sounds good here.

In a nutshell, 5-axis CNC machining is an amazing process to work with. Do you want to experience the sophisticated products resulting from it? Drop us a request and we’ll get you the machined parts fabricated exactly to your needs.

Proper tooling is the most important part of every machining process. We need to have specific functioning milling tools if we want to develop milling parts. Same goes for all other operations. Think of it as cooking; one cannot choose potatoes as the main ingredient when making an apple pie. Yep, this analogy is not far from reality.

So we have different tools for different operations in a CNC machining shop. We might reuse some particularly reusable tools, replace the old types with advanced ones, but that’s about it. True, we focus on quality and durability, something that’ll extend its working capability (and less wear and tear). But, did you ever give a thought to tool shape?

If you didn’t, we’ll tell you why you should pay attention to your tool shapes. Let’s get to the BOTTOM of the CNC machine tools world!

Benefits of Flat Bottom Tools:

At Machining Design, we work with a plethora of tools but flat bottom tools have definitely won our hearts (and infrastructure) over. Here’s a list of reasons why we would suggest it to you as well:

1. Lower Machining Costs

As CNC’rs, we’re all aware that machining is not cheap. Add in tool maintenance and replacement costs, and it’s going to cost us more than ever. While we cannot cut on labor and operational costs, we can definitely save some using the flat bottom tools.

Now, how do they make that possible?

For one, they eliminate the extra run-time by fitting exactly where they are required. Due to their shape, they are often sturdier when compared to traditional machining tools. Carbide fit flat bottom tools beat every other tool in terms of durability. Imagine the amount of money you’ll save!

2. They are more functional

There is a list of drilling operations where these flat bottom tools play the role of a hero. Take thin plate drilling for example. When performing this operation, regular tools often face irregularities due to pushing materials through the exit hole. This derails us from achieving the desired perfection in the drilled holes. Flat bottom drills are extremely beneficial here as due to their general geometry they even downward forces. Hence, more clean surfaces.

3. They don’t create burrs

Unlike traditional tools, using flat bottom drilling tools helps us avoid unexpected (and undesired) burrs on the other side of the material. Make way for straighter and regular holes.

4. Is fit even for angular functions

Flat bottom drills are perfect for irregular surfaces due to their geometry, especially if it’s required to perform angular or tilted operations.

5. It’s stable

When countering with a half hole drilling, flat bottom drilling is proven to extremely beneficial. This is because due to the lack of material on both sides of the drill, any other machining tool may walk to the side of the material, creating an extremely undesirable situation. A flat bottom drill works closely on the entire cutting geometry, making it perfect for drilling half holes even on the edge of the material.

Working with flat bottom CNC tools definitely, make our lives (and machining process) easier. It’s easy to keep, light on pockets and DURABLE. Now, ain’t this what all of us need in our CNC machine shop?

Got questions? Want to go deep into the wonderful world of machining? Just drop us a line, and one of us will get back to you soon!