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Various processing methods

Various machining methods

Two Workpieces at One Cycle(w-workpieces at a time)

Two workpieces at one cycle(w-workpieces at a time) is the method to provide the machining of 2 workpieces at one cycle by placing the loaders and chucking units at 2 positions so that the cycle time becomes simply half.

Work reversing-----Front and Back Simultaneous machining

SHIMADA’s 1 machine enables to provide the processes of work’s front-side machining-->work reversing-->work’s back-side machining-->un-loading, which normally need 2 machines to work for. With this reason, our machine can save the space, man-power and plant & equipment investment payment as well as the improvement of yield rate.

Work of Irregular Shaped Parts

Generally when machining the second process of forging and cut material with chucker type of Multi Spindle Automatic Lathe, load the workpiece while the spindle(chuck) is turning. However, if the works are irregular shape such as squared or hexagonal material, it does not work out well as the chuck and workpiece will be marked with scratches.

To resolve this problem, SHIMADA developed the machine which only one spindle stops its rotation to do loading and un-loading, and other 5 spindles turn to provide the machining. SHIMADA’s this process enables to give the high-efficient lathe machining without idle time/loss time on the irregular shaped works.

Polygon machining

Polygon machining is the method to give the machining on polygonal shaped products such as squared and hexagonal products with vastly short machining time by turning the workpieces, at simultaneously turning tools.
Workpieces are machined by turning bite with double speed of work’ turning speed. To give Polygon machining, the numbers of bites which is half numbers of flats (e.g.1bite for 2 across flat, 2bites for 4 across flats, 3bites for 6 across flats) are placed.

Roll Threading

Roll threading is one of the plastic machining, which transforms the materials by giving strong power with threading machine, and it is the method to give the form on turning round shaped materials with a tool called threading dice. Roll threading was developed for the machining-use of external thread, and currently external thread machining is most commonly used at roll threading machining.

Machining steps: Catch the materials(round shaped material) with threading dice, then form the turning material by giving the pressure onto the dice towards the center of the material.

Roll threading is not done by turning(cutting) process but plastic machining, therefore it does not produce the chip.
In addition, the threading screw is much stronger than the thread cutting screw, and the machining efficiency is high, so it is suitable for the mass-production.

SHIMADA’s Multi Spindle Automatic lathe enables to work on roll threading process with 2 dices by cross slide, and threading process with 3 dices by main slide(end slide).

Formed bite

To machine the workpiece in certain shape, if making bite moved along the machined shape, it takes long machining time and cycle time, and lowers the product efficiency. The bite which was made in the machined shape is called formed bite. It is very useful and effective to machine the materials by pressing the bite having the same blade shape and size as the machined design. It realizes the fast cycle time and enables easy size control.
The formed bite has various types such as dovetail, circular, throw away, flat drill, semi lunar drill, etc..

SHIMADA also proposes suitable blades like formed bite for each work besides the sales of the lathe.


Dovetail can be used repeatedly by only grinding the blade edge, so it is good at cost performance and enables to do the center height adjustment extremely easily.

SHIMADA proposes the suitable dovetail on our Multi Spindle Automatic lathe, and widely use for the cross slides or NC slides.