Conical reamer 1 10 f40 0. Design elements and geometric parameters of reamers

Properties of tool materials Cutting tools operate under conditions of significant power loads, high temperatures, friction and wear. Therefore, tool materials must have certain operational and physical-mechanical properties. The material of the cutting part of the tool has great hardness and high values ​​of permissible stresses for bending, tension, compression and torsion. The hardness of the cutting part of the tool must significantly exceed the hardness of the material of the workpiece being processed. Carbon tool steels contain 1.0...1.3% C. For the manufacture of tools, high-quality steels U10A, U11A, U13A are used. After heat treatment, steels have a red resistance of 200...240 °C. At this temperature, the hardness of the steel decreases sharply and the tools cannot perform cutting work. Allowable cutting speeds do not exceed 0.2...0.3 m/s. Taps, dies, hacksaw blades, drills and countersinks of small diameters are made from these steels. Carbide powders are mixed with cobalt powder, pressed and sintered at 1400....1550 oC. During sintering, cobalt dissolves some of the carbides and melts. The result is a dense material, the structure of which is 80...85% composed of carbide particles connected by a binder. This means that workpieces processed sequentially with the same tool will have minimal dispersion in the dimensions of the machined surfaces. Materials for the manufacture of tools should, if possible, have the lowest percentage of scarce elements.

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Returning goods of proper quality

We draw your attention to the fact that, in accordance with Art. 26.1 of the Law “On Protection of Consumer Rights” The buyer has the right to refuse the goods at any time without giving reasons before its transfer, and after the transfer of the goods - within 7 days.

Returning a product of good quality is possible provided that the specified product has not been used, its presentation, consumer properties, as well as a document confirming the fact and conditions of purchase have been preserved.

In case of refusal of the goods, the company shall refund the funds paid by the Buyer under the contract, with the exception of the costs of delivery of the returned goods from the Buyer, within 10 days from the date the Buyer submits the corresponding demand.

According to Art. 25 “On the Protection of Consumer Rights” The buyer has the right to exchange goods of good quality for a similar product from the seller from whom this product was purchased, if the specified product does not fit in shape, dimensions, style, color, size or configuration. The Buyer can exchange the product for a suitable one within 14 days, not counting the day of purchase.

Exchanges are made only if the marketable appearance and consumer properties of the goods are preserved, a sales receipt or other document confirming payment is available, and also if the specified goods have not been used. If a similar product is not on sale, the Buyer has the right to demand a refund of the money he paid for the specified product.

In case of refusal of the goods, the company returns the funds paid by the Buyer under the contract, with the exception of the costs of delivery of the returned goods from the Buyer, within 14 days from the date the Buyer submits the corresponding demand. In addition, by agreement with the seller, the Buyer can exchange the product when an analogue goes on sale.

If defects in the goods are detected, the Buyer has the right:

• Request a replacement for a product of the same brand (model);
• Request a replacement for the same product of a different brand (model) with a corresponding recalculation of the purchase price;
• Demand a proportionate reduction in the purchase price;
• Refuse to execute the sales contract and demand a refund of the amount paid for the goods.;

The return of goods of inadequate quality is carried out at the expense of the seller.

The Rincom company admits the presence of erroneous or inaccurate information about the product located on our website www.site. To avoid unpleasant situations, we kindly ask you to contact our managers for more information about the product.”

In this catalog you will find all types of reamers - cylindrical, conical, manual, machine, adjustable and solid. All prices include VAT.

Design and principle of operation of reamers

The reamer structurally consists of 3 elements: neck, working and tail parts. The working part is divided into a guide, cutting and calibrating zone. The main characteristics of the working part are:

• Groove profile;
• Width of cylindrical ribbon;
• Pitch and number of teeth;
• Cutting angles.

The cutting part is designed for pre-processing and guiding the movement of the tool. The angle of its cone depends on the purpose of the reamer and the type of clamp. Tools designed for use on metal-cutting machines have 12˚-15˚ for processing steel and 3-5˚ for cast iron. For manual processing, this angle is 1-2˚.

The calibration part is intended for finishing the hole. It consists of a cylindrical section (about 75% of the length) and a zone with a reverse taper. It is the cylindrical part that brings the surface of the hole to its final state.

The reverse taper section reduces friction against the bore walls, thereby reducing breakdown. The taper angles and the length of the cylindrical part depend on the type of reamer; for hand tools, the entire working part has a slight taper. This is done due to the fact that the breakdown during manual work is minimal.

A spiral or straight groove on the working part is designed to remove chips from the working area. To avoid self-tightening or jamming of the tool, the grooves are directed opposite to the rotation of the tool. The profile of the grooves depends on the purpose of the reamer.

The guide strip is the upper part of the tool tooth. Its task is to calibrate the hole and smooth its walls. The width of the ribbon directly affects the quality of surface treatment, but at the same time reduces the wear resistance of the tool. The recommended width of this element is 0.08-0.5 mm.

The maximum number of teeth for finishing reaming is 14 pieces. With a larger number, their rigidity decreases and the removal of chips from the working area worsens. An even number of teeth is adopted to facilitate control of the tool size. The tooth pitch is limited by the number and diameter of the tool.

The reamer has the following sharpening. Sharply sharpened cutting edge. The front angle of tooth sharpening is zero, the rear angle is 5-80. A narrow cylindrical strip is also removed along the top of the tool teeth.

The reamer works by translational-rotational movement along the axis of a finished hole, which has a small allowance in diameter. The cutting edges of the tool remove a thin layer of metal, after which a cylindrical strip smoothes and levels the surface of the workpiece. The reverse taper section improves hole accuracy by reducing friction and runout.

Despite the quality of the surface treatment, marks often remain on the walls of the hole perpendicular to the direction of movement of the tool. This is primarily due to the heterogeneity of the metal of the workpiece, but also to the pressing of the cutting edges of the reamer from an uneven load.

Surface cleanliness is achieved through the use of roughing, semi-finishing and finishing tools. The roughness required for using the reamer is 0.32-1.25 microns in Ra, accuracy up to 6-9 grade.

Classification of sweeps

The classification of sweeps is quite complex, due to the fact that this class includes a large number of tools with common tasks. Based on the type of hole, cylindrical and conical reamers can be distinguished. This also includes stepped ones, their task is to process a number of holes of different diameters, with a coaxial arrangement.

The material of the tool, or more precisely its cutting edges: tool steel, carbide tips or insert teeth.

Structurally, reamers can be divided according to the number of teeth, from 4 to 14. According to the type of chip removal grooves: spiral or straight, as well as the presence of a chip breaking groove.

By quality of processing:

• For cylindrical reamers - quality in cleanliness and class in processing accuracy;
• For conicals, tolerances for the finish of processing: roughing, semi-finishing and finishing;
• Reamers with finishing allowance from No. 1 to No. 6, as well as with different tolerance fields.

Separately, it is necessary to highlight adjustable reamers, which can be used to process holes with a reaming range of 1 mm; the main advantage of these reamers is the quality of surface treatment, but, unfortunately, they are short-lived.

But, nevertheless, reamers can be classified according to the type of clamp: machine and manual. The shank of the former has a cylindrical shape or a Morse cone, as well as attachment ones. Manual ones have a square section for a handle-holder.

Standards governing the production and operation of reamers

Considering the diversity of the class of developments, it is simply impossible to list all GOSTs for them. It is necessary to take into account that some of the instruments could have been produced according to USSR standards, which are no longer valid.

• GOST 29240-91 “Reamers. Terms, definitions and types"
• GOST 11173-76 “Reamers with allowance for finishing. Tolerances"
• GOST 7722-77 “Manual cylindrical reamers. Design and dimensions"
• GOST 1672-80 “Solid machine reamers. Types, parameters and sizes"
• GOST 883-80 “Reamers with a conical tail and attachment ones with insert knives. Basic dimensions"
• GOST 3509-71 “Manual expansion reamers. Design and dimensions"
• GOST 11177-84 “Conical reamers for conical pins. Taper 1:50. Basic dimensions"
• GOST 11184-84 “Manual conical reamers with a taper of 1:30 with a cylindrical shank. Basic dimensions"
• GOST 10079-71 “Conical reamers with a conical shank for Morse tapers. Design and dimensions"
• GOST 11183-71 “Conical reamers with a cylindrical shank for metric cones. Taper 1:20. Design and dimensions"
• GOST 6226-71 “Machine conical reamers with a taper of 1:16 with a tapered shank. Basic dimensions"

Cost of scans from 54.75 to 21981.97 rub/piece

By Decree of the State Committee of Standards of the Council of Ministers of the USSR dated March 17, 1971 No. 477, the introduction date was established

from 01.07.72

1. This standard applies to finishing and preliminary conical reamers with a taper of 1:10, intended:

with diameters from 38 to 95 mm - for processing holes in gear couplings - according to GOST 5006-83;

with diameters of 80 and 100 mm - for processing internal cones (sockets) of machine spindles in accordance with GOST 7343-72.

2. The design and main dimensions of the reamers must correspond to those indicated in the drawing and in the table. 1 and 2.

*Dimensions for reference

Table 1

Dimensions, mm

table 2

Dimensions, mm

Note. Nominal diameters D, D 1 And d installed for finishing reams.

An example of a symbol for a finishing conical reamer with a taper of 1:10, diameter D= 80 mm:

The same, preliminary conical reamer:

4. Center holes - form B according to GOST 114034-74.

5. Structural elements and geometric parameters of developments are indicated in the appendix (recommended).

6. Technical requirements - according to GOST 11178-81.

APPLICATION

CONSTRUCTION ELEMENTS AND GEOMETRICAL PARAMETERS OF REVEAMENTS

1. Structural elements and geometric parameters of preliminary developments are indicated in Fig. 1 and in table. 1 and 2.

Chip separating groove profile

*Dimensions for reference

Table 1

Reamers for machining coupling holes

Dimensions, mm

table 2

Reamers for machining internal tapers of spindles

Dimensions, mm

2. The geometric parameters of the finishing scans are indicated in Fig. 2 and in table. 3 and 4.

Table 3

Reamers for machining coupling holes

Dimensions, mm

Table 4

Reamers for machining internal tapers of spindles

Dimensions, mm

3. Dimensions of radii of roundings and chamfers not specified in this standard are accepted for technological reasons.

4. Surface roughness not specified in the technical requirements of GOST 11178-81, - with the parameter Rz no more than 20 microns