Universal turning tool for roller-rolling (rolling polishing) of the thread root in holes with rollers. It is installed in the turret of a CNC turning center or tool rack on a universal turning machine. Part surfaces are machined to an accuracy of Ra 0.1 using speeds appropriate for finishing methods.
Thread root turning is performed with an interchangeable roller with a radius corresponding to the radius of the thread profile depression. The roller can be adjusted in several axes, including the possibility of adjusting the roller to the thread angle.
The tool is available in several versions
STR6-21-32 dia 20 STR6-21-40 dia 25 STR6-21-60 dia 32
Maximum hardness of the workpiece is 40 HRC
The presence of an elastic element provides a constant rolling force at any point of the machined surface.
The swivel single-roller swage is simple and versatile, it does not require significant working force, which is fully absorbed by the machine units.
The change in surface size during rolling and unrolling is due to buckling of microroughnesses and plastic volumetric deformation of the workpiece. Reverse stroke should not be used as a working stroke because repeated passes in opposite directions can cause excessive deformation of the surface layer.
Running-in increases the fatigue limit of parts by 80% or more, having a favorable effect on part performance. Reduce machining costs * Eliminate auxiliary operations and machines * Polishing on CNC turning centers and universal lathes - Produce surface finishes from Ra 0.6 to Ra 0.1 * Economical tool life with carbide rollers and roller reconditioning
It is used on CNC machines, on conventional lathes. To obtain a stable wave-free surface micro-profile it is recommended to use ST-21 on machines that can provide finishing turning! Materials of machining: any structural steel with a hardness of max. HRc 65 Surface roughness before machining not more than Ra = 1.25 µm Example of details - stems of hydraulic cylinders, slide valve stem, pump heel, shaft, shaft surface under bearings. STANDARD PROCESSING MODES ARE AVAILABLE AFTER PAYMENT OF THE INVOICE! Smoothing tip, diamond trowel, micro-smoothing, hardening, rolling polishing, diamond burnishing (AB).
ATTENTION!!!!
The tool is not used for burnishing Titanium, Niobium, Zirconium because of the high toughness of the material!!!
Quality of chrome plating can be improved by diamond burnishing of its surface. This treatment seals the surface layer and eliminates sealing breaches in the tight joints of chromium-plated parts caused by the presence of micro cracks in the chromium.
Mirror finishing rolling tools
Mirror-like metal surface Diamond burnishing provides increasing the hardness of surfaces of dies and punches more than 1500 NV. Surface roughness of the tool surface decreases to Ra 0,1 micron. Depth of the hardened layer is 50...150 µm.
Minimization of the surface microrelief makes it possible to additionally increase the die resistance indentor radius.
:no_upscale()/s2.siteapi.org/47ce9cbf14b946d/img/k9kcftcar7k4os80ookc0o8k84ws0k "thread root rolling, roller burnishing tool, cogsdill, baublies, cj winter, обкатка резьбы, threadin")
:format(webp):no_upscale()/s2.siteapi.org/47ce9cbf14b946d/img/e445eusz9igokwwoc40c8gscgso4s0 "cold root rolling, roller burnishing tool, cogsdill, baublies, cj winter, обкатка резьбы, threading")