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A good vise can be used for precisionmachining. Identifying the right types of vise for workholding is important to making sure your work is secured while it is being worked on. There are three types of vises that you will usually see in a milling machine.

There is a Machinist Vise.

The design of the machinist vise is popular because it is a multi-purpose tool. The advantage of a flanged bottom is that it allows for more surface area to be used to hold the vise in place. This is great, except it takes up a lot of space, which is fine if the table is large enough. The lock-down vises mean that the jaw is less likely to rise when the screw is tightened.

The Vise is a type of tool.

The CNC vise takes on the challenges of a machinist vise by offering a more compact design with all the rigid holding. Multiple vises can be used in a minimum amount of real estate. The vises are ground on multiple sides so they can be horizontal and sideways. The lack of a flange makes securing them to the table slightly more challenging, but that can be solved with table clamps that are included with the vise. A lock-down design is also a part of the design.

The toolmaker is a tool.

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The toolmaker vises are small, inexpensive, and quite accurate, but more cumbersome to use, because they use a multistep latch instead of a full length screw. When work needs to be moved from one machine to another, toolmaker vises are popular. You can leave the work in a small toolmaker vise and move it to another machine without disturbing the work, including to a drill press, mill, surface grinder or a larger machine. While it keeps the jaws from raising with a lock-down like design, the toolmaker vises do n’t usually have accessories like work stops or replaceable jaws.

Workholding history.

The evolution of trial, error and creativity is a staple of workholding today. The concept of securing objects has been around for hundreds of years. Their version of clamping involved a robe being wrapped around a piece of equipment and then attaching a stick to it.

The creation of the screw led to the creation of the modern vise in the 1700s. Early wooden screw vises were improved with ground metal designs, and then came the idea of lockdown vises, to make them more accurate. When the screw was turned forward, the jaws were liable to lift and tilt slightly, since they did n’t apply force directly to the jaw. The forward force of the screw is translated into forward and downward forces on the jaw by a joint mechanism. Even if the work is elevated and held by the very tops of the jaws, this holds the jaw down and square to the base.

This is not the last word on vises, but it is an interesting review of how the vise on your bench came to be.

Source: https://nhadep247.net
Category: Machine