Thermo-Friendly Concept | OKUMA Only-One Technology | Products

HOME > OKUMA Only-One Technology > Thermo-Friendly Concept

Wow! In other words, an outstanding success. After relentlessly pursing ways to stabilize thermal deformation a true breakthrough in maintaining consistent machining accuracy.

| User 1 | User 2 | User 3 |

"With Okuma's MB-V there's no need to worry about thermal deformation-a tremendous relief."

At present, we have some 120 machine tools in operation at our main plant, and, while the plant is air conditioned, we cannot fully eliminate the effects of ambient temperature changes from solar insulation throughout the day and by season or from heat generated between the machines themselves. Thus, we have to perform dimension corrections a number of times throughout the day depending on the workpiece.

Our workpieces are copper alloy and thus have high machinability, and while compared with a lathe the width tolerances are somewhat large, when machining them on the MB46-V, all we have to do is check the dimensions first thing in the morning after turning the unit on. After that absolutely no corrections are needed. In the past with other machines, we always had to check the dimensions after turning the machine on following the lunch break.

Recently, the trend is for customers to demand higher and higher accuracies and for drawings to show smaller width tolerances. I think this is why the MB-V's is highly esteemed for its high accuracies and reduced cycle times.

Drawn to the MB-V for its high accuracy, we selected it as the core machine for our CVT parts production line

Our company makes CVT parts for mini vehicles to mid-size passenger cars. Among them are parts for oil pumps to drive devices that produce hydraulic pressure. We are currently operating production lines centered around 14 MB-Vs, and in the future plan to bring in more so that we have over 20 of these machines. This expansion of our lines is supported by the recent good condition of Japanese auto makers, and the high demand for CVT in countries around the world.

In selecting the MB-V, the thing that attracted us most was its accuracy. We have had absolutely no problems with accuracy running these machines full-time, 24 hours a day with no special climate controlled environment. Compared with other vertical machining centers, the thermal stability is outstanding.

Before we brought in the MB-Vs, we experienced real difficulties with measures to combat thermal deformation during the machining of scrolls (compressor parts) for air conditioners, as strict accuracy is required for the positioning reference hole. That alone was enough to make us realize the high level of accuracy of the
MB-V.

Continously variable transmission (CVT) parts, a main product

Customers can see the impressive workmanship of the dies at a glance

One of our company's strengths is designing and making rubber forming dies to make weather stripping attached to automobile doors and windows. These rubber forming dies are complex connected dies, with thin single layers and strict accuracy demands. They also require 3-dimensional machining, so high level techniques are needed.

We operate our MB-Vs an average of 18-20 hours a day, but there are almost no machining steps on square sur-faces, and customers who visit our company comment that the "sharpness and luster" are different, as if the dies were saying "Hey, look at me!" Since we brought in our MB-Vs, the machines we had been using for finishing have been used only for semi-finishing.

<< INDEX	<< BACK