Although hard turning it is not an alternative for all grinding operations, the potential cost savings from reduced setup times, faster cycle times and lower equipment costs are too big to ignore. Since it shares many fundamentals with standard turning processes, hard turning has the additional benefit of being able to be easily assimilatedGet Price
With these interests in mind, the builder is always eager to find the best process for an application, whether it involves hard turning or grinding. Mr. Titus points to the GA26T OD grinder, shown recently at the 2012 International Manufacturing Technology Show IMTS, as a representative example of grinding technology from Okuma.
In this case a hybrid machine, such as the MikroTurnGrind 1000, which combines hard turning and finish grinding in one machine could be the solution to your challenge. This would allow you to apply the most suitable process, for each surface to be machined, all in one setup without the need for multiple machines.
A major advantage of scrollfree turning is its very short cycle times this process is up to 10 times faster than grinding or longitudinal turning corner radius 0.8 mm, feed 0.15 mm to 1.5 mm to produce a surface Rz 6.3.
Grinding, however, achieves higher tolerances than hard turning, but in cases where grinding can be replaced with hard turning, there are numerous benefits. Hard turnings benefits include shorter cycle times and part loading and unloading times as well as chip production that can be recycled and better energy efficiency.
Hard Turning steels with a hardness over 45 HRc. Hard turning is a cost efficient alternative to grinding which has been proven to reduce machining time and costs by 70 or more, and also offers improved flexibility, better lead times and higher quality.
Junker39s hard turninggrinding machine is called the Hardpoint. Built on a platform that resembles a slant bed lathe, the basic Hardpoint model 1000 uses a gang tool arrangement that can process, in combination, hard turning, grinding, offcenter fine machining and radial drilling operations.
With a 500 grinding wheel for example, this can be done up to 15 000 times. And it should also be borne in mind that grinding is less susceptible to material in homogeneities such as hardness fluctuations or inclusions, than hard turning or milling. SMT. This article is an edited version of a QampA supplied by United Grinding Group.
Generally speaking, hard turning is an alternative to grinding. As such, it39s a finishing process with emphasis on dimensional accuracy and surface finish quality. Like some grinding operations, hard turning is used to finish a workpiece that has been heat treated.
Although hard turning it is not an alternative for all grinding operations, the potential cost savings from reduced setup times, faster cycle times and lower equipment costs are too big to ignore. Since it shares many fundamentals with standard turning processes, hard turning has the additional benefit of being able to be easily assimilated
Machining vs. Grinding Machining is the material removal process that shearsdamages the material. D Workpiece Chip Tool Chip D Workpiece Abrasive grain Cutting with a positive D Abrasive grinding with a negative D
The process combination hard turning grinding is used, to great effect, to reduce cycle times. Where the complete hard finishing process hard turning and grinding is carried out on a single machine, throughput, transport and storage times can be drastically reduced. There are also advantages in the reduction of setup efforts and setting times.
The greatest advantage to hard turning, however, is that it eliminates a grinding operation to finish the part. Therein lies the payoff that makes hard turning such an attractive alternative to many machine shops.
Getting the Most Out of Hard Turning Hard turning is one process that, when done well, can eliminate the need for grinding and improve throughput in the shop. Traditionally, production of most parts made from hard or hardened materials, defined as those at or more than 45 HRc, required dedicated grinding equipment and processes.
The combination of a number of processes such as hard turning and grinding on a single machine, allows for the exploitation of considerable rationalisation potentials.
Grinding will always have its role in metalworking, but the idea behind hard turning is an alternative to the investment in capital equipment and skills associated with the process. A turning shop that can use hard turning as an extension of soft turning, in the right applications, can perform more valueadded service to its customers.
Cost Evaluation of Grinding vs Hard Turning is meant for engineers,sales persons, production managers and any persons that need to understand what process is best suited for their production process.
Here, its flexiblity is shown in finish machining of shafttype components with CBN grinding, hard turning and leadfree turning. Plungecut grinding with CBN can improve cycle times. This photo of the machining area of the HG 208 shows the angular CBN infeed grinding of a gear shaft.
Hard Turning Might Not Be As Hard As You Think Turning hardened materials to grindinglike accuracies takes the right combination of part, machine and process parameters. A properly tuned hard turning system can reduce, and in some cases eliminate, grinding and its associated high tooling costs and long processing time.
The reason for this was the availability of new tool materials and the capability of designing a turning machine that was rigid, stable and accurate enough to successfully finish hard turn. The result of these developments have made finish hard turning a viable alternative to grinding, as an accurate finishing operation.
Turning is a machining process in which a cutting tool, typically a nonrotary tool bit, describes a helix toolpath by moving more or less linearly while the workpiece rotates.. Usually the term 34turning34 is reserved for the generation of external surfaces by this cutting action, whereas this same essential cutting action when applied to internal surfaces holes, of one kind or another is