Custom metal components fabrication sheet metal parts

Materials Utilized:

Carbon Steel, Stainless Steel, Galvanized, Aluminium, Beryllium Copper, Nickel Alloys, Brass, Copper

Industries Served:
Electronics, Medical Device, Telecommunications, Automotive or Transportation, Electrical Appliances, Computer, Industrial Equipment.

Cages, Cabinets, Enclosures, Brackets, Covers, Manifolds, Vent Hoods, Medical Parts, Other Appliances Components, Boxes,

Surface finishing for Sheet Metal Parts:

Anodizing, Painting, Passivating, Powder Coating, Plating.

 Shenzhen Seetop Technology Co.,Limited is a precision manufacturing factory located in Guang Dong. It is a professional manufacturer of cnc processing, 3D printing, stamping, sheet metal, aluminum & plastic extrusion, pressure die casting, silicone mold and injection molding. We have a complete production management system, ISO standard, and The internal staff has systematically trained the ISO process, so the production, manufacturing, testing, assembly and packaging of the products are very clear.

CNC machining services

Galaxy3DM is professional in CNC machining. we use advanced equipment to offer you a variety of CNC machining services including CNC milling, CNC turning, EDM, wire EDM, surface grinding and much more.And we have  imported cnc 3 axis machining, cnc 4 axis machining and cnc 5 axis machining centers.

Galaxy3DM CNC Machining Service Advantages:

We stand out in the industry because of these advantages:

1: There are a large number of engineers over 10 years old, and we also have a very professional international sales team.

2: With strict quality inspection, they are strictly in accordance with ISO standards, and we also have advanced machines to provide more sophisticated production services.

3: We have a team of quotes, CNC, sheet metal, 3D printing, injection molding, etc., all of which are reviewed by a professional engineering team. Can be quoted within 24 hours.

Contact us for Equipment List

Galaxy3DM Quality Assurance

Our quality assurance starts from incoming materials inspection, then first article and in-process inspection, and final inspection and testing with reports and certifications before shipping.

Quality Control System

We are equipped with cutting-edge measuring and testing equipment in house, we execute inspection and quality control system for the whole process to make sure every project meet your requirement. Our quality assurance starts from incoming materials inspection, then first article and in-process inspection, and final inspection and testing with reports and certifications before shipping.

RAW Material Control

Purchasing material from suppliers without certificate is very risky. So we always need to get a report from our material supplier ,and check this material composition.

QC will check all size if match our drawings , meantime ,also will check all surface if ok .If all ok ,this material will agree go into our warehouse.

Imaging if we used wrong material and have a size is wrong , will loss very big cost to remake parts ,and also lead time can’t be guaranteed,thanks for all tester, All problems Sorted.

On-Site Inspection

QC people will checking on-site all parts every two hours, this is very important work during produce, because if find is wrong after products finished , thats very danger, So we have to make sure that we don’t make any mistakes at every step, even we find wrong ,we also can rescue .

Go-no go fixed gauges | Ring gauge

Thread test also is very imortant point, because surface finishing will affect this thread ,for example, Anodized, Plating, Heat treatment… We need to control this thread tight/loose during machining, Ensure that all thread is ok after go-no go fixed gauges | ring gauge checked.

Projector Measuring Instrument

It can measure point, line, circle, arc and oval, rectangular with the multi-point positioning function, combination of measurements, center structure and the intersection of structure, the midpoint of construction, line structure, a round structure.It has various functions of data processing, display, input and output, Measurement data output Word, Excel and Auto CAD directly to conduct statistical analysis, particularly, and the work piece straightening function is very useful.

Coordinate Measuring Machine

At its most basic a coordinate is a point, a fixed singular location in three-dimensional space. A series of points can be used to define the parameters of a complex shape. Therefore a CMM(coordinate measuring machine definition) is any device that is able to collect this set of points for a given object and to do so with an acceptable degree of accuracy and repeatability.

The sheet metal punching is one of the most common sheet metal processing. Realized with automatic CNC machines, the punching is the result of the work of presses and dies able to realize holes of any shape and size.  

1. How does the sheet metal punching work?

The sheet metal punching machines use punches that pass through the sheet metal, while the dies, located on the other side of the metal piece, work as support ensuring the non-breaking of metal and they help punches to realize accurate holes and error-free. A process that allow to realize sheet and metal parts of any shape and design, depending on the needs.

2. Which metals can be punched?

Thank to the evolution of sheet metal punching, of machines and know-how, almost all metals can be punched: iron, stainless steel, aluminum, copper, brass and special alloys. 

This flexibility allowed to the sheet metal punching to spread in a wide range of fields: engineering, pharmaceutical, automotive, manufacturing, electronics, textiles and many other.

3. Do you need different punches for each hole and shape?

No, you don’t. If you have to realize some particular shapes in few quantity and you don’t want to invest in a specific mould, you can combine the dies you’ve already have.For example: do you need to realize a shape like that in the picture below?

You don’t need new punches; you can combine oval punches together with circular punches in order to obtain this kind of design.

Different scenario if instead the need to create specific shapes becomes more assiduous. In that case, we suggest you to buy a specific mold.

4. How to calculate the power of the punching machine?

In the last post, we showed you the formula of sheet metal punching. 

F = punch force in Kilonewton (10 kN = 1 metric ton)

U = circumference or perimeter of the punch shape (in mm)

s = Sheet thickness (in mm)

Rm = tensile strength (in N/mm²)         

         for Stainless Steel (1.4301) 720 N/mm²         

         for Mild Steel (St 37) 420 N/mm²         

         for Aluminum (AlMg3) 220 N/mm²

         f = factor between 0,5 - 0,95 when using punches with shear.

It 'a good idea during punching, to follow certain rules in order to get better performance from the punches and matrices. 

Round holes: minimum diameter greater than or equal to the thickness of the sheet. 

Shaped holes: the shortest side greater than or equal to the thickness of the sheet.

5. How long can you use your dies?

 Normally, your punching tools have a medium tool life of 400 ,000 to 600 ,000 strokes.There’re, however, a series of very useful suggestions that ensure you a longer life of your mould; for example, you can be accurate in the lubrication and cleaning by removing dirt with compressed air and clean rags. Periodically check the cutting edge of the punch and die, proceeding, when necessary, with sharpening. Moreover, in sheet metal punching process, is important to process punching on the right materials and use the right energy power.