Technology definitions
Chinese name:
Trampoline
English name:
Boring machine
definition:
Mainly use boring tools to machine existing machine tools with prefabricated holes.
The role of the trampoline
A machine that primarily boring a prefabricated hole in a workpiece with a boring tool. In general, the boring tool rotates as the main motion, and the boring tool or workpiece moves as a feed motion. It is mainly used to process high-precision holes or complete finishing of multiple holes at a time. In addition, it can also be used to process other processing surfaces related to hole finishing. The use of different tools and attachments also allows drilling, milling, cutting, and machining with higher surface quality than the drill press. Boring machines are the main equipment for the processing of large box parts. Threads and outer diameters, end faces, etc.
Classification of trampolines (by structure and objects processed)
(1) Horizontal boring machine
Horizontal boring machine is the most widely used boring machine. It is mainly used for hole machining. The precision of boring hole can reach IT7, and the surface roughness Ra is 1.6-0.8um. ​​The main parameter of horizontal boring machine is spindle diameter.
Horizontal boring machine
The boring axis is horizontally arranged and axially fed. The spindle box moves vertically along the front pillar guide, and the table moves in the longitudinal or transverse direction for boring processing. This type of machine tool is widely used and economical. It is mainly used for hole machining of box (or bracket) parts and other machining surfaces related to holes.
(2) coordinate boring machine
The coordinate boring machine is a kind of high-precision machine tool. Its structural features are precision measuring devices with coordinate positions. The coordinate boring machine can be divided into single-column coordinate boring machine, double-column coordinate boring machine and horizontal coordinate boring machine.
The boring machine has a precise coordinate positioning device, which is mainly used for boring the size, shape, and especially the hole system with higher requirements for position accuracy. It can also be used for precision coordinate measurement, template scribe, scale and other work.
Single-column coordinate boring machine: The main shaft drives the tool for rotating main movement, and the main shaft sleeve makes feed movement in the axial direction. Features: Simple structure, easy operation, especially suitable for processing precision holes of plate parts, but its rigidity is poor, so this structure is only suitable for small and medium-sized coordinate boring machine.
Double-column coordinate boring machine: The main shaft is equipped with a tool for the main movement, and the workpiece is mounted on the work table along the table to make a longitudinal straight line movement along the bed rail. Its rigidity is better, and currently large-scale coordinate boring machines use this structure. The main parameter of the double-column coordinate boring machine is the table width. Horizontal coordinate boring machine: The worktable can make a rotary motion in the horizontal plane, and the feed motion can be realized by the longitudinal movement of the worktable or the axial movement of the main shaft. Its processing accuracy is high.
(3) King Kong trampoline
The feature is to process with a very small feed rate and a very high cutting speed.
The workpiece has a high dimensional accuracy (IT6) and the surface roughness can reach 0.2 micron.
Precise boring boring machine using tools such as diamond or carbide.
(4) Deep hole drilling boring machine
The deep hole drilling boring machine itself has strong rigidity, good precision, a wide range of spindle speeds, and the feed system is driven by AC servo motor, which can adapt to the needs of various deep hole machining processes. The oil cooler is tightly fastened and the workpiece is tightly closed with a hydraulic device. The meter display is safe and reliable. The following types of work can be selected: 1. Workpiece rotation, tool rotation and reciprocating feed movement, suitable for drilling and small diameter boring; 2. Workpiece rotation, the tool does not rotate only for reciprocating motion, suitable for large diameter hole And nesting processing; 3. The workpiece does not rotate, tool rotation and reciprocating feed motion, suitable for drilling of complex workpieces and small diameter drilling and small diameter boring.
(5) Floor trampoline
The work piece is placed on the landing table and the column moves longitudinally or laterally along the bed. For machining large workpieces.
There are also milling and boring machines that can be milled, or deep hole drilling boring machines for drilling.
Sheet metal forming processes are those in which force is applied to a piece of sheet metal to modify its geometry rather than remove any material. The applied force stresses the metal beyond its yield strength, causing the material to plastically deform, but not to fail. By doing so, the sheet can be bent or stretched into a variety of complex shapes. Sheet metal forming processes include the following:
l Bending
l Roll forming
l Deep Drawing
l Stretch forming
Bending
Bending is a metal forming process in which a force is applied to a piece of sheet metal, causing it to bend at an angle and form the desired shape. A bending operation causes deformation along one axis, but a sequence of several different operations can be performed to create a complex part. Bent parts can be quite small, such as a bracket, such as a large enclosure or chassis.
V bending and Wipe bending
Roll forming
Roll forming, is a metal forming process in which sheet metal is progressively shaped through a series of bending operations. The process is performed on a roll forming line. Each station has a roller, referred to as a roller die, positioned on both sides of the sheet. The shape and size of the roller die may be unique to that station, or several identical roller dies may be used in different positions. The roller dies may be above and below the sheet, along the sides, at an angle, etc. the roller dies are lubricated to reduce friction between the die and the sheet, thus reducing the tool wear. Also, lubricant can allow for a higher production rate, which will also depend on the material thickness, number of roll stations, and radius of each bend. The roll forming line can also include other Sheet Metal Fabrication operations before or after the roll forming, such as punching or shearing.
Deep drawing
Deep drawing is a metal forming process in which sheet metal is stretched into the desired part shape. A tool pushes downward on the sheet metal, forcing it into a die cavity in the shape of the desired part. The tensile forces applied to the sheet cause it to plastically deform into a cup-shaped part. Deep drawn parts are characterized by a depth equal to more than half of the diameter of the part. These parts can have a variety of cross sections with straight, tapered, or even curved walls, but cylindrical or rectangular parts are most common. Deep drawing is most effective with ductile metals, such as aluminum, brass, copper, and mild steel. Examples of parts formed with deep drawing include automotive bodies and fuel tanks, cans, cups, kitchen sinks, and pots and pans
Stretch Forming
Stretch forming is a metal forming process in which a piece of sheet metal is stretched and bent simultaneously over a die in order to form large contoured parts. Stretch forming is performed on a stretch press, in which a piece of sheet metal is securely gripped along its edges by gripping jaws. The gripping jaws are each attached to a carriage that is pulled by pneumatic or hydraulic force to stretch the sheet. The tooling used in this process is a stretch form block, called a form die, which is a solid contoured piece against which the sheet metal will be pressed. The most common stretch presses are oriented vertically, in which the form die rests on a press table that can be raised into the sheet by a hydraulic ram. As the form die is driven into the sheet, which is gripped tightly at its edges, the tensile forces increase and the sheet plastically deforms into a new shape. Horizontal stretch presses mount the form die sideways on a stationary press table, while the gripping jaws pull the sheet horizontally around the form die
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