A press brake is a machine tool for bending sheets and plates, most often sheet metal. This forms a predetermined curve by clamping the workpiece between a suitable punch and die.
Typically, two C-frames form the side of the press brake, connected to the table at the bottom and on the light that can be moved at the top. The bottom tool is mounted on the table, with the top tool mounted on the top beam.
Video Press brake
Jenis
Brakes can be explained by basic parameters, such as style or tonnage and working length. Additional parameters include the length of scratches, the distance between the uprights frame or the side house, the distance to the rear gauge, and the working height. The upper beam usually operates at speeds ranging from 1 to 15 mm/s.
There are several types of brakes as described by applying power: mechanical, pneumatic, hydraulic, and servo-electric.
In the mechanical press, energy is added to the flywheel with an electric motor. A coupling involves a flywheel to light a crank mechanism that drives the ram vertically. Accuracy and speed are two advantages of the mechanical press.
Hydraulic press operates by using two synchronized hydraulic cylinders on the C-frame that move the top beam. The servo-electric brake uses the servo-motor to drive the ball or drive the belt to remove tonnage on the ram.
Pneumatic presses use air pressure to develop tonnage on ram.
Until the 1950s, mechanical brakes dominated the world market. The advent of hydraulics and better computer control has led to the most popular hydraulic engines.
Pneumatic and servo-electric machines are commonly used in lower tonnage applications. Hydraulic brakes produce high-quality products that are accurate, reliable, use less energy and are more secure because, unlike pressure driven flywheels, ram motion can be easily stopped at any time in response to security devices, eg. curtain light or other sensing means of existence.
The hotfixes are mainly in controls and tools called backgauge. The rear gauge is a device that can be used to accurately position a piece of metal so that the brake places the bend in the right place. Furthermore, the return meter can be programmed to move between corners to repeatedly create complex parts. The initial brake depends on the tooling to determine the angle of the bend. The animation on the right shows the operation of the rear gauge, setting the distance from the edge of the material or the previous bend to the center of the dice.
Press brakes often include a computer-controlled multi-axis rear gauge. The optical sensor allows the operator to make adjustments during the bending process. This sensor sends real-time data about the angle of bending in the cycle bend to the control engine that adjusts the process parameters.
Maps Press brake
Died
The press brake can be used for a variety of different forming jobs with the exact die design. Types of dies include:
- V-dies - the most common dead type. Bottom down can be made with different size die openings to handle various materials and curved angles.
- Rotary bending die - cylindrical shape with 88-degree V cuts along its axis sitting on the "saddle" punch. Dice is the foundation on which rockers bend paper.
- 90 degrees off - mostly used for lower operations. The die opening dimension depends on the thickness of the material.
- The water-bending angle is dead - used in the air curve, this can actually be used to produce acute, 90 degrees, and blunt angles by varying how deeply the punch enters the die by adjusting the ram.
- Gooseneck (return-flanging) dies - The blow is designed to allow for clearing of already-formed flanges
- Offset dies - a combination of punch and die sets that bend two corners in a stroke to produce a Z shape.
- Hemming off - two dead stages combine an acute dead angle with the leveling tool.
- Seaming dies - There are a number of ways to create dies to produce connections in sheets and tubes.
- Radius dies - A radiussed bend can be generated by a round punch. The bottom of the die may be V-off or may include a spring or rubber pad to form the underside of the dice.
- Beads die - A bead or "stop rib" may be a feature that sharpens the resulting part. The blow has a round head with a flat shoulder on each side of the bead. Down is the opposite of a blow.
- Curling dies - Dies form a curled or circular edge on the sheet.
- Tubes and pipe-forming die - first operation bend the edges of the sheet to make the pieces roll up. Then a die similar to curling die causes the tube to form. A larger tube is formed on the mandrel.
- Four-way dead block - A single dead block may have a V engine to each of the four sides to facilitate small work changes.
- Channels die - Blows can be pressed into the mold to form two corners at the bottom of the sheet, forming an angled channel.
- U-bend dies - Same as channel shaper, but with rounded bottom. Spring return may be a problem and a means may need to be provided to fight it.
- Box-shaping off - While a box can be formed by a simple corner bend on each side, the length of the different sides of the rectangular box should be accommodated by building punches in sections. The punch should also be high enough to accommodate the height of the sides of the resulting box.
- The wavy die - Such prints have wavy surfaces and may involve hollow spring elements.
- Multiple-bend dies dies - Set die can be built in the desired profile form and form multiple bends in one press round.
- Type-rocker die - Blow rocker inserts can allow for some side-to-side movement, in addition to the up-and-down movement of the press.
See also
- Brakes (flexible sheet metal)
- Bending machine (manufacturing)
- Bending (mechanical)
- The tube is bent
- Spring Back Compensation
- Main Guide to Press Brake
References
Further reading
- Benson, Steve D. Brake Press Technology: A Guide to Precision Metal Sheet Cutting. Society of Manufacturing Engineers, 1997. ISBNÃ, 978-0-87263-483-1
Source of the article : Wikipedia
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