SURFACE GRINDING MACHINE
Surface Grinding machine is a grinding machine which refers to the manufacture of flat shape and a flat surface on a workpiece under a rotating grindstone. Surface grinding machine can be encountered in ATMI on Brand and Magerle machine. In general, grinding machines are used for grinding the surface of the machine table moves horizontally back and forth. Workpiece gripped on the magnetic table, driven back and forth under a millstone. Table on flat grinding machine can be operated manually or automatically which can be arranged on the lever.
b. Classification
Surface grinding machine based on the movement of the table and spindlenya divided into four kinds, namely:
1. flat horizontal grinding machines with alternating motion table
The grinding machine used to grind objects with flat and angled surfaces. Regarding the step length on the table and the transverse movement of the grinding stone can be set on the table lever grinding machine according to the nature and character of the workpiece to be done.
2. flat horizontal grinding machine with rotating table motion
This type of machine is used for grinding flat surfaces on cylindrical workpieces. Precisely section of the flat surface of the workpiece with a turning movement table surface grinding machine.
3. flat vertical grinding machines with alternating motion table
This type of machine is used to grind the surface of objects flat, wide and angled. Grinding takes place on the side of the grinding wheel so that when the process must be careful in feeds (DOC) by way of a more piecemeal. How this is done so that the workpiece does not burn when receiving a load and cross-sectional area is too large on the side of the grinding stone pieces.
4. flat vertical grinding machine with rotating table motion
This type of machine is used for grinding the flat surface of the shaft and the hole. Can also to make precise holes if there is no universal grinding machine in your garage when the need for such grinding holes in the image opposite.
Based on the principle works flat grinding machines are divided into two kinds, namely:
1. Surface grinding semi-automatic, the cutting process can be done manually (hand) and the automated machine.
2. Surface grinding automatic cutting process is set through the program (NC / CNC Numerical Control and / Computer Numerically Control).
Based on the principle of cooling (coolant) flat grinding machines are divided into two kinds, namely:
Dry grinding
In accordance with its objectives, dry grinding is done without using coolant. So that dust arising from the grinding does not fly and inhaled by people working, the machine is equipped with a vacuum cleaner. Because if not vacuumed, the dust will settle on engine parts.
Wet grinding
In the wet grinding coolant used to prevent dust arising from grinding. This needs to be maintained in order not to involve the operator, nor strewn out the engine and hit the floor. Therefore this machine needs to be equipped shield to withstand the cooling fluid. In the wet grinding, we can maintain the properties of the metal, because the temperature did not rise due to friction in the cutting process.
The main working principle of surface grinding machine is a back and forth movement of the workpiece, and the rotational motion of the tool. Judging from the main working principle of these machines, grinding machines flat in outline has three major movements, namely:
1) Motion rotary grinding stone.
2) Move the table lengthwise and crosswise.
3) Motion feeds
c. Various clamping on surface grinding machine
1. Tables electric magnet
This clamping is most often used most of the surface grinding machine. Thin workpieces that are not able to be done on a regular clamping chuck is suitable for this. Clamping occurs due to the magnetic field generated by the flow of electricity. On the flat grinding machine that serves as clamp workpiece is a grinding machine table itself. Workpiece clamping process using an electric magnet table, must have a condition that the surface is cleaned and magnet magnet table in the on position. The workpiece is placed on the surface of the magnet table and set to work the magnetic field lines. Of course, the workpiece should be in pristine condition as well. Clamping using electromagnetic principles. Bars which in the end is set so as to produce a magnetic north and south poles alternately when electrified. So that the flow of the magnetic field passing through the workpiece used nonferro metal plate inserted on top of clamping magnet. When removing the workpiece is done with a cut off electricity to the magnet clamping using on / off button.
2. Table of permanent magnets
Clamping occurs due to the permanent magnets contained in clamp. In the grinding machine of this type, which flow through the magnet is a permanent table, workpiece clamping process using a machine equipped with this type of table is similar to the process of clamping the workpiece on a flat grinding machines in general. However, there are several things that distinguish this type of machine with a grinding machine in general.
The difference is as follows.
a. This theory just as magnetic that are in Stand Dial indicator. 2 mengadung magnetic poles work and when there are two different poles brought near (north-south), 2 poles do not work if there are two similar poles brought closer.
b. The difference lies in the magnetic source that has been owned, without using a flow of electrical current (permanent magnet plates).
b. Permanent magnet plates located between the metal anti magnets mounted between the upper and lower plates.
c. Top plate has a plate inserts anti magnet which serves to direct the flow of the magnetic field.
d. Lever position "ON", the position of a piece with pole magnet plate inserts in the upper plate. The magnetic field flows from the south pole to the outside pole (upper plate) and passes the workpiece is forwarded to the north pole and the bottom plate so that the workpiece to be gripped.
e. The workpiece is set to the work flow of the magnetic field lines contained in dibble magnet.
f. Lever position "OFF", the flow of the magnet is moved as the magnetic plates and inserts are not collinear magnetic fields of work flow. Upper plate and inserts will cover the flow toward the workpiece so that the workpiece is not gripped.
3. Swivel vice
Used when the workpiece clamping that all areas have been grinded, where between one another perpendicular and parallel. The workpiece clamping process using this vice as follows.
· The surface of the workpiece is clamped by the vice produces grinded field that will have a good elbow and alignment with the proviso vice already configured elbow and flat.
· Vice gripped by using a dibble magnet in position can be changed change according to the desired grinding. Fields of vice is used as a base and retaining field.
· Surface clamping field and seized must be clean of impurities that interfere clamping and precision grinding.
· To grind the workpiece perpendicular, vice rotated 90 ° without having to open the clamping workpieces, on condition that the workpiece surface is higher than the surface of the vise jaws. For another angle can also be done by setting the position of the workpiece before using bevel transfer that has been set on the bevel protactor.
3. Table sinus
Sine table can be used for gripping the workpiece in grinding at an angle to achieve precision angular unit in seconds,
The clamping process the workpiece with the vise sinus as follows.
· The table is gripped in a magnetic table (the table surface sinus also contain magnets that are useful to put the workpiece at the top).
· The slope of the desired angle is set to loosen a key that is usually tuned by L. Then the key is positioned at the desired angle and then tightened again.
· The workpiece is mounted on top of the table sine field with magnetic table clamping system as well.
4. The sine table universal
No doubt that the workpiece has a complex shape. It depends on factors such workpieces with a partner later when dissembling. To measure that has a slope demands, this table is very suitable for clamping. Universal sine table is used to form an angle toward the vertical and horizontal direction. Serves to continue the flow of the magnetic field of the magnetic source to the workpiece. There are three standard forms of conductive blocks, namely a square, triangular and V groove, or Block V. each axis has angle information so that we can twirling this table.
Block V square block
5. The special clamping
· Block conductor magnetic field (layered packing), used for gripping workpieces do not allow gripped directly on the magnet table.
· Block conductor magnetic field grooved V, used for gripping workpieces angled with special angle.
d. Parts of Main Machine Surface Grinding
Column
This section serves to prop up the grinding head unit.
Reversing Direction lever Desk
serves to reverse the direction of motion slicing table. Equipped with a stopper as limit the movement of the table surface grinding machine.
Handle Aft
serves to move the table with the lengthwise direction can be set stride length.
Handle Transverse
serves to counter the transverse direction can be set stride length.
Control Box
Wherein lies the control buttons are in use as a machine control center.
Coolant Box
Place the coolant. This place must often in check as if to negligence can make the chip in the form of powder settles and can hinder circulation of coolant.
Alas Machine
Alas machine bed is also called a box made of cast iron and placed inside the hydraulic drive unit. At the top of the bed there is a V-shaped groove as a sleigh gliding.
Sledge
Sledge called the saddle. Sledge moves back and forth in a longitudinal or transverse direction above the bed.
Table
This table is attached to the upper surface of the carriage. Equipment workbench equipped with three grooves T to place a bolt fastener. Table surface grinding machine with precision when assembled. On the table can be placed magnet for gripping workpieces.
Grinding head
Grinding head unit is made of cast iron, in which there is the axis of the grinding wheel and the retaining friction of bullets. Axis or grinding shaft made of alloy steel and grinded precision. At one end of the axis of a motor or pulleys attached.
e. Workpieces produced
Sample results from surface grinding machine is Parallel block, V-Block, Caliper, Bed Machine, etc.
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