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The protruding cylindrical part of the hub pose the main problem in the production of this part.

The total tolerance for the inner and outer diameter of the cylindrical part is 0.03 mm, while the wall thickness itself is only 0.1 mm with a tolerance of 0.02 mm – like thick foil.

A boring cutter specially manufactured by our own pre-production department allowed us to meet the requirements for the production of the inner part of a thin-walled element (4th class of roughness).

In order to meet the requirements for the outer diameter and wall thickness, we used special tooling to prevent material breakout  when processing it with a cutter.

An additional challenge was to control the roughness of the inner surface. In order for the profilometer to access this surface, two parts had to be destroyed (cut in half): one for our own quality control and the other for customer control abroad. Moreover, the part had to be cut also on a milling machine in specially manufactured tooling.

As a result, the technology is fully developed, the technological process is ready. We chose a Swiss Type CNC Lathe as the equipment for this technology.

RESIF manufactured a small batch of such bodies for hydraulic systems.

The customer addressed the following problem: it was necessary to manufacture a sufficiently long part (225 mm) with a through hole with a variable diameter (the smallest diameter — 20 mm); then the client himself applied a special coating on the part.

Further, the RESIF team solved a technologically difficult task: to polish the surface with the requirement of a surface roughness of Ra 0.2 for a part with such parameters (a fairly long and with a variable diameter) and the coating already applied by the customer. The problem was solved by using a number of turning and metalworking polishing operations.

RESIF Technologies Bel produces aluminium bodies for servomotors, which activate innovative collaborative robots (cobots).

Cobots consist of servomotors and connecting elements made of aluminum, up to 7 “joints” in total. In connection with such a structure, even a 5-micron inaccuracy in the first link causes a millimeter deviation on the cobot terminal device.

The RESIF team of professionals in the results of long-term development of technologies and consultation with the customer, has found the optimal solution for high-precision manufacturing of bodies (both milling and turning are used). Also important and difficult to implement was the requirement for the outer surface of the part (waviness, stripes, spots, dots, strokes, traces of drips and any other defects that violate the uniformity of gloss, monotony and intensity of color are not allowed). The special technology of finishing machining and strong control of requirements for galvanic processing (exact calculation of dimensional tolerance) made it possible to achieve a perfect result.

At first we didn’t succed, but now even other mechanical parts for its innovative products are produced for this customer. Thus, the customer can focus on the most important business issues: the development of cobots, software for them and, of course, sales. Thanks RESIF company investing in expensive equipment and the creation of manufacturing (including support services, labor protection, technological and repair services, machine tool operators) became unnecessary.

Our company manufactures Vernon globes for some instrument-making and sci-tech enterprises. Such globes are used for measuring devices of effective ambient temperature (temperature subjectively perceived by a person at his location).

The globe consists of the upper and lower semiglobes. Semiglobes with a thickness of 0.5 mm are roll out on metal turning lathe from an aluminum sheet with a thickness 0.8 mm by rolling method.

To paint such a detail, it is especially important to achieve a deep matte degree of reflection (not more than 7%). Painting provides an approved partner of our company, which has successfully passed certification for all quality requirements.

This unit is supposed to carry significant load in construction of the product. It also must have the opportunity to be assembled and disassembled in case of installation and service.

The unit is produced with the help of milling, turning and gear cutting (mode 0,8); assembling also made by RESIF.

It is hard to notice but the bronze gear consists of two ideally fitted halves.

RESIF produce hulls to place control devices for “underwater robots” of French research machines for sea survey.

Turning and milling were used. The unusual look of dome was achieved by using balayage method (surface scanning) with roughness 3,2.

Total processing time is 1788 minutes.

Machining is performed on machining milling center using technological features of manufacturing high accuracy components (several thermal operations of dimensional stabilization).

Dimensional control is provided on the 3D complex with the deviation of the parts surfaces from the mathematical model + – 5 µm.

Electroplating coating – anodic oxide coating in chromium salts with sealing in 50% potassium dichromate solution (coating class 1, 1000 hours of salt spray, coating thickness – 4-6 μm).

Assembling the unit of 11 parts and marking (manually) are made on our fitting shop, coil springs are made by outsourcing. The input control by the customer’s quality service was 100%.

RESIF was entrusted with the manifacture of several different bodies for experimental SLR camera lenses of legendary manufacturer.

The number of assistive devices (mandrels etc.) for some of bodies reached 14 items. To avoid deformation of thin-walled parts we tried several types of material and variants of heat treatment.

The main technological challenge was the application of an internal non-throw grooves for high-precision positioning of the optical group. This task was successfully solved by producing a specialized driving tool on our own.

We produced trial version first, than control version and finally serial batch of components for our clietnt’s engines.

The client got the reliable supplier represented by RESIF and gained the goal to loose its production capacity and concentrate on key competences of the company.

As a result of multiple tweaking of the components to customer requirements RESIF was added into the list of approved subcontractors. During the tweaking we were forced to unify our measuring system and quality control with client’s system more than improve the technology of production and geometric parameters of the product. Also one of the client’s requirements to these components was full absence of any mechanic damage.

Our technologists were able to surprise the client with unusual method to make a through horizontal aperture in hexagon of high quality.

The hull is used in analyzer and designed to determine mass fraction of sulfur in automobile fuel, oil and oil products.

According to the customer’s designer the 2nd group casting should be used as a bulk. But RESIF offered the complete production of parts from a single bar with a diameter 300mm. As a result, the customer saved about 15% of the cost (taking into account necessary finalization of casting – 25%) and received the hull without any hidden defects, which could make the work of the vacuum part of the device impossible.

We used elongated cutter with replaceable plates to make deep pockets (up to 300mm) with guaranteed radius 10 mm in the corners. The method of plunger treatment was applied. Deformation taps were used to gear milling in the hole. Milling was also performed by scanning method, heat treatment (stabilizing structural improvement ).
Tribofinish processing gave the final trade look to this complex product. Thanks to it, the conditions for subsequent painting were also improved.