Internal Precision One-pass Honing Machine High-quality one-pass honing by KURAKI

KIP series is produced by KURAKI's numerous machine tool development technologies, such as high-accuracy positioning, high-accuracy boring spindle technology, etc. Epoch-making technology of one pass honing is capable of small diameter (φ1-50 mm) precision grinding. One tool action greatly contributes to the shortening of the machining processes and allows for the expansion to machining a variety of workpieces.

One pass machining ― dramatically effective precision grinding

One pass honing is an epoch-making engineering method capable of high-accuracy grinding only by passing a tool into a workpiece I.D. Only one stroke in the vertical travel while in a rotary cutting motion with a fine vibration utilizing an electrodeposition grinding wheel together can perform rough grinding, finishing honing, and mirror-face machining with only one machine. As the machining time is predominantly short compared with conventional honing and the tact time is fixed, the production line efficiency and stabilization are ensured.

Fine vibrations can effectively discharge swarf and prevent clogging and workpiece damage. Moreover, supply of grinding abrasive is smooth to suppress the workpiece grinding wheel from increasing in temperature.

One pass machining ― dramatically effective precision grinding

High-accuracy dedicated tools designed by KURAKI

The diamond/CBN tools developed only for KIP series are designed and controlled by our experienced engineers to meet customers' machining requirements. The abrasive grains can be reproduced many times by electrodeposition in good cost performance. An approximately 0.1mm diameter depth of cut into highly hardened steel with high-abrasive grain strength is possible by one pass of a tool depending on the machining conditions. Troublesome tool diameter adjustments are easily facilitated.

Employment of a high-accuracy collet chuck on the end of the main spindle unit enhances tool change repeatability. Optional automatic tool expansion device and toolchanger can have more productive automation.

High-accuracy dedicated tools designed by KURAKI

Corresponding to various diversified workpiece materials and shapes

One pass honing can perform heavy grinding of workpieces having a lot of grinding allowances, depending on the settings of vibration width and vibration frequency. In addition, this corresponds to soft materials or hard-to-machine materials like aluminum or stainless steel whose swarf is tiny and can cause clogging. Rotation and vibration can be separately driven, so machining only in vertical vibration is available (excluding KIP-50 and KIP-200).

■Examples of machinable materials
Cast iron, steel material (hardened steel), stainless steel, aluminum alloy, copper alloy, carbide, ceramics, etc.
■Examples of machinable shapes
Key slot, hole having a through hole, different shapes

Examples of machining by KIP series

Business Type Automobile
Product Injector Gear Sleeve
Shape Injector Gear Sleeve
Dimension φ6×23mm φ16×20mm φ10×65mm
Material Quality SUS440C SCM220 Alminium
Machining Step 3 3 2
Machining Time 18sec 12sec 12sec
Roundness 0.2μm 0.3μm 0.5μm
Cylindricity 0.4μm 0.5μm 1.5μm
Roughness Rz 0.2μm Rz 0.5μm Ra 0.7μm
Machining Allowance 30μm 80μm 50μm
Machine Type KIP-50 KIP-300 KIP-300
Business Type Hydraulic Equipment Ceramics
Product Valve Body Sleeve/Bush
Shape Valve Body Sleeve/Bush
Dimension φ18×50mm φ2.5×12mm
Material Quality FCD500 Ceramics
Machining Step 2 4
Machining Time 30sec 18sec
Roundness 0.6μm 1.0μm
Cylindricity 2.0μm 1.0μm
Roughness Rmax 1.5μm Rz 0.8μm
Machining Allowance 30μm 10μm
Machine Type KIP-300 KIP-50

*The above data is available in machining under the specific condition.