How much do you know about hole machining?

In machining, hole machining accounts for about 1/3 of the total machining. Hole machining is semi-enclosed cutting. Chip removal, heat transfer, cutting liquid cooling are all difficult, especially more difficult hole deep processing.

The classification of the hole:

1) by shape: there are cylindrical holes, conical holes, drum holes, polygonal holes, spline holes and other special-shaped holes (such as curved holes), etc. Among them, cylindrical holes are most widely used.
2) by form: there are through-hole and blind hole (blocked hole); Deep hole (L/D = 5 ~ 20 is a general deep hole, L/D is a medium deep hole, L/D is a medium deep hole, and L/D﹥30 ~ 100 is called a special deep hole) and a shallow hole.
3) according to the size of aperture: there are big holes (D﹥100mm), ordinary holes (D = 10～100mm), small holes (D＝1～10mm) and micro holes (D ＜ 1mm).
4) according to the processing mechanism: mechanical processing, special processing, electromechanical compound machining, etc. Although there are many special machining methods, the traditional machining will still be the main method of hole machining because of the expensive equipment and low processing efficiency.
5) according to the machining accuracy: Rough machining holes (such as holes after boring and rough boring), semi-fine bore (such as reaming, coarse ream, semi-fine boring hole) and precise hole (such as fine hinge, fine pull, fine grinding, honing, grinding hole). Precision holes generally refer to tolerances above grade IT7 – IT6 and surface roughness is Ra﹤ 0.8～0.4m. Its geometrical shape precision (such as roundness, cylindrical degree, axis straightness, etc.) is generally specified in the range of 1/2 ~ 1/3 of its dimensional tolerance band.

With the rapid development of aerospace, automobile, high-speed train, wind power, electronics, household appliances, energy, mold, hydraulic, machine tool and precision machinery and other equipment manufacturing industries and the upgrading of products, the application of precision holes is increasing day by day.

Characteristics of hole machining:

Hole machining is a complex process, which must solve the problem of chip removal, cooling, lubrication and guidance. Hole machining has a wide range of applications. The quality of its processing will directly affect the use and life of the product. The cutting mechanism of hole machining is complex, the cutting tools are various, and the machining is difficult. In mechanical parts, the precision and surface roughness of the hole are required to be improved day by day. Precision hole machining is often the key to production. In order to improve the economic efficiency of hole processing, many factories use advanced cutting tools: polygonal rotary broaching tools, single blade boring reamer of cemented carbide, precision diamond burnishing tools or cubic boron nitride reamer, roller burnishing tools and other new processes.

roller burnishing tools, skiving burnishing tools, rotary broaching tools, deburring and chamfering tools, external roller burnishing machines manufacturer

RBT is the one-stop solution provider for burnishing hole. Our burnishing tools covers roller burnishing tools, skiving burnishing tools, rotary broaching tools, deburring and chamfering tools, external roller burnishing machines, etc. Since the company was founded in 2007, we have served over 2,000 customers worldwide. Welcome new and old customers come to the consultation to discuss!

What are the performance of the rolling tool products?

Roller burnishing tools, extruding machine, extruding tool, skiving and roller burnishing tool, superfine burnishing rolling head is a special tool for machining holes and shaft parts with no cutting rolling principle.

The surface of the metal surface has a plastic deformation, so that the workpiece reaches the mirror.

The precision of workpiece dimension is guaranteed, and the wear resistance, corrosion resistance and fatigue resistance are obviously improved.

Burnishing rollers have been widely used in aviation, automobile, motorcycle, hydraulic pneumatic and electromechanical industries.

We have steadily improved the quality and efficiency of our products, and have been well received by our customers with high precision and reasonable price.

Product performance

After rough machining of the workpiece, the surface roughness can be reduced to ra0.2um — 0.05um, from around the Ra6.3um.
With mechanical fine tuning device, the deviation control is very accurate (within 5/1000mm), and the mass production size is the same. Through hole, blind hole, taper hole, outer cone, hole end face, step shaft can be processed.
After rolling, the hardness of the working surface can be increased by 40HV, which improves the fatigue resistance.
This tool is small in size and easy to operate, and has low maintenance cost in the long term (parts with wear and tear can be replaced).
It can be used in cars, boring, drilling, milling, CNC machining centers and special production lines, replacing and better than traditional grinding, honing, grinding and other processes.

What’s the processing principle of roller burnishing tools?

Schematic representation of roller burnishing process.

Schematic representation of burnishing process.

The roller burnishing tools works like a road roller flattening the uneven road.
Roller burnishing tool is to use very smooth roller rolling by processing the surface of the metal, the workpiece performance high extrusion convex parts to dips, so that the machining surface smooth as a mirror effect, this is a kind of plastic processing.
The surface roughness of workpiece is up from Ry1.6-3.2 um to Ry0.1-0.2 um, and improve the processing surface hardness, wear resistance, corrosion resistance, sealing, etc., to eliminate early wear, these have the advantage of machining cannot be replaced.
The rolling tool has a fine tuning device. The adjustment coefficient of each small grid is 0.0025mm, and the total adjustment range is 0.3mm-0.4mm. Therefore, the precision of the processed dimension is also improved accordingly.

The control method of roller burnishing tools

1. Measuring the burnishing tool’s diameter with micrometer.
2. Push the calibrated set to the handle and rotate it at the same time, adjust the diameter of the tool, reduce the left rotation, and increase the right rotation, each scale value is 0.0025mm.
3. When the diameter is adjusted, release the aluminum shell and automatically lock the diameter.
4. When machining blind holes and step holes, the bottom is about 0.5mm-1.0mm cannot be machined. The needle can lightly touch the bottom of the hole.

Processing equipment

We are roller burnishing tools suppliers. RBT roller burnishing tools are suitable for common drilling machine, lathe, boring machine and machining center.
The clamping forms of tools include: straight shank and Morse taper shank. It can also be made according to customer needs.

Our Roller Burnishing Tools are made using high-grade raw material, at the vendors’ end. Our product range is highly demanded in the market for its hassle-free work performance the users’ premises.

If you do not know how to choose the model of the burnishing tools, you can contact us. We have professional customer service staff to help you find the most suitable product.

Three types of RBT burnishing tools, buy RBT Roller Burnishing Tools

Roller Burnishing Tools Manufacturer, Roller Burnishing Tools Exporter, Roller Burnishing Tools Supplier

Three types of RBT burnishing tools

Roller burnishing has long been used on a wide variety of automotive and heavy equipment components (construction, agricultural, mining and so on), including piston and connecting rod bores, brake system components, transmission parts and torque converter hubs.

Burnishing tools are now widely used in non-automotive applications to achieve a variety of benefits: to create a better, more durable seal surface; Increased wear life; Reduce friction and noise level of running parts; And enhance the appearance; to improve wear life; to reduce friction and noise levels in running parts; and to enhance cosmetic appearance. Examples include valves, pistons for hydraulic or pneumatic cylinders, lawn and garden equipment components, shafts for pumps, shafts running in bushings, bearing bores, and plumbing fixtures.

RBT Roller Burnishing Tools are used for the aim of burnishing the cylindrical holes that have an open and closed end. The tools provide as well as surface hardness and calibration (measurement accuracy) beside of burnishing. According to the process type, there are three types of RBT burnishing tools:

RBT roller burnishing tool applications

Blind Hole machine-feeding

These burnishing tools process stepped or fully closed holes up to end. While the tools process the workpiece, the machine provides feeding speed which is needed.

Through Hole machine-feeding

These burnishing tools process the holes with open ends. The machine provides the required feed speed when the tool is working on the workpiece.The tool or the workpiece can be turned with the speed of max. 250 m/min. The feeding speed of the machine can range from 0,05 mm/rev. to 0,3 mm/rev. for per roller.

Through Hole self-feeding

These burnishing tools process the holes with open ends. The tools provide own feeding speed which is needed while it is processing the workpiece. Feeding occurs free from the machine.

Why choose RBT?

Roller Burnishing Tools Manufacturer, Roller Burnishing Tools Exporter, Roller Burnishing Tools Supplier

We have emerged as a highly reliable Manufacturer, Exporter and Supplier of Roller Burnishing Tools in China. We can offered to the customers is a high quality range of Roller Burnishing Tools as per their specific requirements.

Our Roller Burnishing Tools are made using high-grade raw material, at the vendors’ end. Our product range is highly demanded in the market for its hassle-free work performance the users’ premises.