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Month: October 2022

Reduce Waste and Increase Efficiency with Turret Punch Presses

Written by getmilk on . Posted in Blog.

1)Short Run and Progressive Tooling for Turret Punch Presses

Turret Punch Presses have become one of the most popular metal forming methods utilised in today’s manufacturing facilities with its important role in automated manufacturing systems. It is utilised in many industries such as packaging, food & beverage and the medical device industry. These machines utilise metal forming actions to create progressive dies for multiple components at once within a short time period.

Benefits of Turret Punching

A turret press is a punching machine. It punches out different shapes and holes in paper, plastic, and even metal. Since it performs the same actions repeatedly, it is a highly efficient machine. As a result, it reduces the waste of materials. In addition, since the machine can punch out different holes, it increases the efficiency with which it serves its purpose. For example, rather than punching out the same hole in an endless number of sheets, the turret press can punch out a different hole in each sheet. This not only increases efficiency, but it also decreases waste.

Technical Details of Turret Punching

A turret punch press also called a rotary die punch press, is a machine used to punch holes in paper, cardboard, or other thin sheets. It consists of a pair of rotating turrets with a die set between them. Each turret contains several punches. A sheet is placed on the lower punch and the upper punch descends, punching the sheet. The die set contains the punches. The die rotates around its centre point as the punch descends. The blades in the die cut the sheet as it passes through. A turret punch press can punch up to 250 sheets a minute. It can also handle a variety of materials, including leather, plastic, cloth, and paper.

Practical Applications of Turret Punching

A turret punch press is a mechanical device that punches holes into a paper. Typically, a punch press is used for paperboard, corrugated fiberboard, plastics, leather, or other thin materials. Several types of punching machines exist, including single-stroke, double-stroke, and electric. Single-stroke machines are the simplest and least expensive. These machines consist of a single ram and a punch and die set. If you are printing on just a few sheets of paper, a single-stroke press will work fine. However, these machines are noisy and slow. Double-stroke presses are more common. These machines have two rams, which work together to make holes. These machines are also faster and quieter. Electric press machines are the most expensive but also the fastest. A turret punch press machine features several stations, or turrets, that rotate. In a single-stroke machine, the turret moves up and down. In a two-ram machine, the turret moves forward and backward. Each turret has a specific function. For example, one station punches holes. Another station registers the holes. Additionally, some machines have a separate station for die cutting.

2 Short Run and Progressive Tools for Turret Punch Press:

  • 1) Special Forming Tools

Turret punch presses provide a variety of functions that aid in production. For example, turret punch presses can provide embossing, debossing, creasing, perforating, numbering, and slitting. In addition, many turret punch presses come with special features such as built-in calculators, programmable features, and computers. User-Friendly Turret punch presses are simple and easy to use. The press is user-friendly, requiring no prior knowledge of the machine’s operation.

  • 2) Wheel Tools

Wheel tools have been developed that are capable of shearing, ribbing, offsetting, and scoring as fast as the machine can move the sheet of material. These tools allow for the creation of shapes that were previously difficult and expensive to create.

Power tool accessories: Countersinks

Written by getmilk on . Posted in Blog.

A countersink is a conical hole that is tapered at the bottom. The taper helps make the press-fit tight thus ensuring the rivet stays in place. Countersinks are generally used in one of two applications;

  1. The countersink is the press-fit hole that has been pressed or rolled into a hole or
  2. The countersink is a hole that has been drilled in preparation for assembly.

What are the advantages of a countersink?

Countersinks help makes assembly easier and assists in controlling how much the rivet head protrudes. Countersinks also help with controlling the amount of material being removed from the hole being drilled.
How do you use a countersink? First, begin by drilling the hole. The key to making this step easy is making sure your drill bit is sharp. A dull bit can tear the material being drilled. Once the hole is drilled, insert the rivet into the hole and mark the rivet s head. The mark will define the depth you have.

Types of countersinksCenter

  • 1. Countersink – The centre countersink leaves a centre countersink hole in the material. The centre countersink is normally used for larger-diameter rivets.
  • 2. Flat Countersink – The flat countersink leaves a flat countersink hole in the material. The flat countersink is used for smaller-diameter rivets.
  • 3. Cup Countersink – The cup countersink leaves a cup countersink hole in the material. The cup countersink is used for smaller-diameter rivets.
  • 4. Tapered Countersink – The tapered countersink leaves a tapered countersink hole in the material. The tapered countersink is used for larger-diameter rivets.
  • 5. Conical Countersink – The conical countersink leaves a conical countersink hole in the material. The conical countersink is used for larger-diameter rivets.
  • 6. Combination Countersink – The combination countersink leaves a combination countersink hole in the material. The combination countersink is used for larger-diameter rivets.

Choosing the best countersink bit

The key to using a countersink is choosing the right bit. Depending on the material being drilled, there are different qualities you should look for in your bit. Steels – In general, steels are strong enough to be drilled by high-speed steel (HSS) bits. One consideration is the hardness of the steel. The harder the steel, the slower you need to drive the bit. If you are not sure of the material, use a cobalt alloy bit. Drill speeds for steels vary between 50 and 250 rpm. Aluminium – In general, use carbide-tipped bits for aluminium.

Conclusion :


After all is said and done, using the right tools and following the right procedures is the key to drilling a perfectly countersunk hole.

The Significance of Open Height and Stroke in a Press Brake

Written by getmilk on . Posted in Blog.

The success of many companies projects are dependent on the skills of a press brake operator, which means it is important to understand the significance of open height and stroke when working with tooling.

Open Height

Open height is defined as the distance between the ram and the dies. Open height is rated in terms of both inches and millimetres. It is important to know the tooling open height in order to properly select and order a punch die. Calculations for open height: To calculate the open height of a press brake, the following formula is to be used: Open height = (max. part thickness + 1/2″) + 3/32″
Open height = (max. part thickness + 1/2″) +

Stroke Length

The stroke length of a press machine is selected depending on the details of the job at hand. The stroke length can be anywhere from .010″ to .065″, or longer. Shorter stroke lengths will accommodate smaller parts. Longer stroke lengths will accommodate longer parts. A longer stroke length also affects the open height.

Determining Stroke

The stroke is the amount of travel that occurs from a completely open machine to a completely closed machine. To find the stroke, you simply subtract the closed height from the open height.

Referencing Example 1:

The stroke is 3 3/32″ (20.00″-19.5937). Hand Brake vs Pedal Brake
The stroke length differs between the different types of hand brakes and pedal brakes. Hand brakes have shorter stroke lengths than pedal brakes due to the fact that the dies are mounted directly to the press ram. Pedal brakes have larger stroke lengths because the dies are attached to an axle, allowing them to move farther away from the machine.

With Different Stroke Lengths, if you choose not to load the press brake properly, the punching distance comes into play. If the press brake is not properly loaded, you could end up with damaged tooling and scrapped parts. Prior to loading the press brake, you should determine the proper punching distance. The punching distance is the distance away from the die opening that the part should be punched. The punching distance is affected by the selected stroke length.

Conclusion:

Knowledge of open height and stroke is important when contacting a reputable tooling company for tooling quotes.

A Comprehensive Guide to the Oil-canning Effect

Written by getmilk on . Posted in Blog.

You’ve seen the commercials for the latest and greatest wide-load trucking technologies that promise to completely eliminate the oil canning effect. It feels like there must be an innovator out there who will find a way to finally stop oil canning once and for all.

What is oil canning in applications?

Oil canning also referred to as distortion, is a warping effect that takes place during the punching process. After sign blanks have been punched from the coil, the edges are rounded off. The shape changes from a flat, straight edge to a rounded edge. The edge can bend outward or inward. The severity of the distortion depends on the order and the direction of the bending. Oil canning becomes more pronounced as the steel is thinner. The thinnest steel available on today’s market—5052-H14—is about .020 in. thick. Unfortunately, anything thinner will result in brittle steel that will break before it bends.

How to prevent oil canning

1) Go for Thicker, Higher-Quality Material – Thicker metal results in less edge rounding, so the roof will be less likely to warp.

2) Plan in advance for Correctly Sized Fasteners – Adequate fastening and a stronger structure are integral to eliminating warping. Fasteners should be sized accordingly, typically using .200 or .250 in. fasteners. Using fasteners that are too large can crack through the thinner steel.

3) Use Punches with High Deflection – If you will be punching through thinner material, choose a punch with high deflection. Punches with a deflection value of .020 in. or less are generally recommended for thinner material.

4) Punch in Accordance with Punch Die Size – Punches should be sized according to the size of the intended die. A larger punch size will produce a weaker structure while a smaller punch size will produce a sturdier structure.

5) Use a uniform supporting material – The supporting material should be determined according to the type of punch being used. For example, if the punch is perforated, you should use a supporting material that is also not perforated.

6) Use a Tooling Material that Minimises Stress Wrinkling – Maintaining a uniform tool surface not only ensures better punching quality but also minimises stress wrinkling.

7) Choose an Operating Speed that Allows for the Clearance of Punches – The punching speed should be set based on the clearance between the punch tip and the bed of the material being punched.