Cutting boring bars

All these principles are however scarcely suited to compensation for the deflection of thin boring bars. In this area, mechatronic initiatives with additional actuators have great potential. In the solutions already known (Bushuev 1991 Katsuki et al. 1992 Koren et al. 1999 Brecher et al. 2005), the tool cutting edges can be adjusted to compensate for deflections of the boring bar. The active boring tool shown in Fig. 6 consists of... 

Actuator, Fig. 6 Active boring bar to compensate for the deflection of the cutting edges boring processes (Brecher et al. 2005)... 

The bottom mold half is shown in figure 92. Begin by cutting a 1-3/8 length of 2-1/2 x 2-1/2 aluminum or C.R.S. bar stock. Face off both ends. Center the mold in the 4-Jaw chuck. Using the tail stock chuck drill a 1/2" hole 1 deep. Mount a boring.bar in the tool post and increase the diameter of the 1/2" hole to 1-1/4", I deep. Adjust compound rest to 79 degrees and bore the mold cavity 1 deep. Dimension at bottom of cavity to be 1-1/4". Dimension at the top of the cavity to be 1-5/8 diameter. Then bore to 1-5/8 diameter, 1/16" back from the end. 

In contrast, self-excited vibration called chatter vibration often occurs on the boring bar of a cutting tool being used to expand the bores in metal parts. It is especially disturbing in iron boring operations. When chatter vibration is excited, it not only affects the finishing... 

The implements ordinaiily used for this purpose are the jumper, or drill, the hammer, and the scraper. The jumper is a bar of iron, in length propor tioned to the depth of hole to be bored, and is faced with steel for a part of its length those of inches diameter and upward are worked by three men, two of whom strike alternately on the end of the jumper with hammers, while the third turns it so as to con stantly present the cutting edge to a fresh surface of stone. 

To begin, cut a board the length of a radius of the circle you wish to cut, plus extra for a handle. Mark a line across the board for the saw slot (1) and bore it out (2) (be careful of saw kick-back as you do this). Clamp the edger to the sawbar, insert the bar through the slot and bolt the unit to the board (3). Measure from the inside edge of a chain cutter and mark the desired radius in the center of the board (4). Drive a spike through the board at that mark for a pivot (5), and tack the spike into the center of the circle. Start the saw and enter the cut by pushing the handle end of the board (6). 

In these cases, inclines and outlet channels or bore holes have to be drilled. As in all non-cutting production procedures, nonuniform wall thicknesses and material accumulations should be avoided. The nonuniform temperature distribution that therefore results leads to inhomogeneous fusion and surface properties of the molded parts. The design steam pressure is a maximum of 1.5 bar with PS-E and 5 bar with PP-E for special materials steam pressure up to 7.5 bar. In addition to steam pressure, the compound-dependent foam pressure should be around 1 bar to maximum of 2 bar. Cooling of the mold is mostly done by spraying water onto the mold walls. The necessary cooling system and spray nozzles are installed into the steam chamber. It is essential to keep the spray nozzles a sufficient distance from the mold wall so a sufficiently big spray cone can be formed. Position, quantity, number, and flow of the single spray nozzles have to be adapted to the mold to achieve optimum results. 

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