How to Make a Blacksmith Hydraulic Press

Blacksmiths use hydraulic presses to forge metal into different shapes more quickly and precisely than with traditional methods like hammer-and-anvil forging.

Forging creates an uninterrupted grain structure, which gives press forged pieces more strength and ductility compared to those made by pounding. Press forged parts can be found in oilfield tools, automotive vehicles and agricultural equipment applications.

Hydraulic System

Hydraulic systems can be found virtually everywhere you look in the modern world, from elevators and snowplows to barber chairs. Elevators rely on hydraulic systems for car movement and stoppage; snowplows push them back and forth across snowfields; bakeries utilize them in mass producing dough products and pastries; barber chairs utilize hydraulics so they can rise or lower themselves up or down, lean backwards or forwards as the user adjusts levers; commercial vehicles, fairground rides and wind turbines all utilize hydraulic power!

Pascal's Law forms the basis of hydraulic systems, which states that pressure travels instantly through fluid and is equal in every direction, providing equal power regardless of how large an force applied is. A hydraulic system uses pumps and valves to power and direct where hydraulic fluid moves before finally being stored in a reservoir so any excess pressure can be released as needed.

Hydraulic cylinders convert mechanical energy of a hydraulic system to energy used for specific tasks, providing energy as required for specific tasks. Actuators in the system provide specific forms of energy required by various applications. It may include hydraulic motors to generate rotation or linear motion or even hydraulic rams for linear movement.

As with any form of energy, hydraulics must be managed carefully for workers' safety. This involves making sure the system is fully shut off before any worker begins servicing equipment. Failing to do this could result in crushing events or the need for surgical amputation of exposed tissue. To prevent accidents from arising when operating hydraulic equipment, all workers should familiarize themselves with its proper operating procedures and know how to lock out or tag out equipment before starting any work. Verifying that no energy/pressure exists within a hydraulic system requires using a pressure gauge; this safety issue should be taken seriously as any uncontrolled hydraulic energy can result in serious bodily harm to anyone unfamiliar with them.

Jack Stage

At the core of this press lies a 20 ton hydraulic jack. When muscle power is applied to its pump handle, a piston in turn forces oil from its reservoir into its main cylinder and pushes it upward, until eventually stopping because of a bleed valve at its base allowing its piston to retract back in.

As part of its double stage pump system, this press's jack features a double stage pump whose pressure range stretches from approximately 2 gpm up to 3500 psi. When switched over to high pressure mode, a gradual climb uphill leads to its peak before dropping back down again - providing moderate forging speed but providing ample opportunity for fine work or raising dies and speeding up processes as necessary.

A blacksmith can use the jack to perform various metalworking tasks such as cutting, bending, shaping, forging, heating and flattening metal. He may use it to press 12" by 3/16" mild steel facets into place to form the framework for a chandelier - something which might take several days of labor using traditional methods alone but which only takes an hour when using the press.

Karl Metalworks posted an informative 10-minute YouTube video, detailing their forging press in action to forge knife blades and other items. It provides great details of its components - an invaluable resource for anyone seeking to build their own blacksmith press and extend beyond what could be achieved using just power hammers alone.

Randy McDaniel's book "Hydraulic Forging Press for the Blacksmith" provides another useful resource. This in-depth book details both its history and significance for blacksmithing as well as how and why these presses should be utilized by them, how much can be forged in them, compared with other equipment/tools and discussed tooling strategies - an indispensable read indeed!

Hydraulic Pump

A hydraulic pump is at the core of any hydraulic system, responsible for converting electrical energy into mechanical energy and hydraulic pressure that moves objects or fluids. Your choice of pump will depend on the task your press needs to fulfill; there are various kinds out there and it's essential that you understand their function before purchasing one.

The piston pump is one of the most widely-used types of hydraulic pumps. A piston pump consists of multiple cylinders connected by reciprocating pistons that alternately generate suction and discharge flow, with their inlets and outlets located within a valve hub for easy access. Piston pumps can be purchased in either fixed-displacement designs or variable displacement designs for ultimate flexibility and versatility.

As the piston retracts, it opens its inlet check valve while simultaneously closing its outlet check valve, creating a negative pressure in the inlet side of the pump and forcing liquid through its inlet into its chambers. As liquid enters this space, its force unseats its inlet check valve on the ram and forces liquid through. Once this has happened, piston can move back and forth creating positive pressure at its outlet side and generate constant volumes of oil each cycle - this action being repeated to create positive pressure at its outlet side; its capacity rating will typically include its maximum operating pressure capability along with delivery volumes in terms of gallon/litres/min at certain drive speeds/rpms.

The radial piston pump shares many similarities with traditional piston pumps, but uses an eccentrically mounted rotor within its housing to drive an array of radially-arranged pistons in and out of their respective cylinders at irregular intervals to create alternating suction and discharge flows with minimal pulsation. Variable-displacement options are also available.

Swash plate pumps feature a swivel that adjusts the angle of each piston as it enters and exits its respective cylinders, changing stroke length as a result of entering and exiting their respective chambers. Furthermore, this plate also controls depth as each piston enters and exits their respective cylinders to vary displacement; making these among the most efficient pumps currently available.

Control Valve

Control valves are essential parts of the hydraulic system of any blacksmith press, enabling the operator to manage pressure at an adjustable psi level until achieving compaction pressure. Furthermore, they help regulate temperature, flow rate and liquid level as well as provide protection from potentially hazardous conditions in the system.

There are various types of control valves, from electric, pneumatic and hydraulic models. Also referred to as regulators, these devices can help control upstream and downstream levels or pressures, temperature or liquid flows in different channels. Available in various shapes and sizes as well as materials compositions - the key factor being their response time in order to be effective.

Control valves consist of internal trim parts, valve body and actuators - these may be electrical, pneumatic or hydraulic depending on their purpose - that work to control opening and closing action of valve stems. Furthermore, these are capable of providing stable positioning solutions as well as On/Off applications for isolation services.

Electric actuators are motor-driven devices capable of producing rotational movements when given an electrical signal, which are then converted to linear movement to drive valve stems for flow modulation. Electric actuators can be used for On/Off control applications as well as isolation services.

Pneumatic actuators use compressed air pressure to produce modulating control action. A signal is transferred through tubing to an actuator diaphragm plate; when this signal is applied, it overcomes spring forces to open or close valves.

While rotary valves are more reliable than their linear counterparts, they tend to be more costly and inefficient. Used mainly in applications that demand high operating temperatures or large capacity (such as food production), as well as pharmaceutical product manufacture. Available in multiple sizes including large diameter models that can accommodate solid particles; high pressure applications also make this versatile tool applicable across many industrial processes.