Both planers and shapers employ single point cutting tools for metal removal. But in case of shaper, reciprocating motion is given to the cutting tool whereas in case of planer the work reciprocates and tool is given the feed. On shapers, comparatively small work-pieces are machined whereas large work-pieces are handled on the planer because of its capacity of long [...]
Planers are usually classified according to their main structures and accordingly they can be of the following types: i. One side, ii. Double housing, iii. Pit edge (plate), iv. Profile type. The open side planer is made with only one supporting column. Its main advantage is that work may be extended out over the bed. It is less rigid. Three [...]
The block diagram showing the principal parts of the double housing planer is shown in Fig. 15.1 and the various parts are described below: Part # 1. Bed: Planer bed is a very strong and robust structure, made out of cast iron and strengthened with cross-ribs. On very long planers the bed is sometimes made from two or more castings [...]
The following methods are employed for achieving the quick motion in backward stroke and slow motion in forward stroke of the planer table: 1. D.C. Reversible Motor 2. Fast and Loose Pulleys 3. Hydraulic System. 1. D.C. Reversible Motor: In this method, a special motor which can change its speed according to the field current applied, is used. The motor [...]
It is possible to machine a great variety of shapes and sizes of work on planer. This has been possible because of availability of wide variety of holding and clamping devices. Various holding devices are plane vise, planer centres, etc. Various clamping accessories are: i. Bolts, ii. Clamps, iii. Clamping blocks, iv. Shims, v. Planer jacks, vi. Braces, vii. Planer [...]
The following points highlight the top four operations of planing in the industries. The operations are: 1. Planing Vertical or Angular Surfaces 2. Gang Tooling 3. Double Cutting Tool Boxes 4. Hot Planning. Operation # 1. Planing Vertical or Angular Surfaces: In such cases, the side-head may be used to advantage. If the cross- rail tool head is to be [...]
Planing tools have a relatively large cross-section because they are designed for maximum rigidity. The shank of the tool is made of high strength heat treated alloy steel and inserts are brazed or held mechanically on the shank. By using carbide tools in place of HSS, the planing time can be reduced by about 50%. The number and variety of [...]