Technical data sheet for sharpening and grinding machine 3K634

Equipment for detailed processing of products

All this is special equipment for manual sharpening and finishing of various types of tools:

• The floor-standing grinding and grinding machine model 3K634 is equipped with two grinding wheels, type PP 400×50×203, PV 400×50×203.
• With a diameter from 110 to 450 mm or more, depending on the type of equipment and manufacturer.
• The height of the incisors to be sharpened should be in the range of 6–100.
• The permissible sharpening angle of the drill is from 70 to 140 degrees.
• Parts are processed with a universal wheel for detailed polishing of products H – 55 mm, D – 400 mm, Dpos – 50 mm.
• The spindle operates at a maximum speed of 30 m/min and a permissible rotation speed of 1.44 thousand revolutions per minute.
• Machine dimensions – 1000×665×1230 mm.
• The weight of the machine reaches 425 kg depending on the type of unit.

The equipment is mainly used for processing certain batches of parts; manipulations are carried out for finishing and repairing products for subsequent full-fledged work.

Technical characteristics of the grinding machine 3K634

Bibliography:

1. Dibner L.G., Tsofin E.E. Sharpening machines and semi-automatic machines, 1978
2. Demyanovsky K.I., Dunaev V.D. Sharpening wood cutting tools, 1965
3. Kudryashov A.A. Tool production machines, 1968
4. Lisova A.I. Design, adjustment and operation of metal-cutting machines, 1971
5. Menitsky I.D. Universal sharpening machines, 1968
6. Paley M. M. Technology of production of metal-cutting tools, 1982
7. Rozhkov D.S. Design, setup and operation of equipment for sharpening wood-cutting tools, 1978

Related Links. Additional Information

• Classification and main characteristics of the grinding group
• Repair, restoration and modernization of grinding machines: the American approach
• Cylindrical grinding. Processing on cylindrical grinding machines. Grinding Methods
• Setting up a cylindrical grinding machine when installing parts in centers
• CNC grinding machines
• Marking of grinding wheels
• Testing and checking metal-cutting machines for accuracy
• Grinding machines. Market of grinding machines in Russia
• Directory of grinding machine manufacturers
• Directory of factories producing metal-cutting machines
• Directory of surface grinding machines
• Articles on the topic

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Unit design

The 3M634 grinding machine has a very simple design that does not require complex maintenance; it is enough to carry out a certain list of operations. All technical characteristics are included in the passport.

The equipment consists of the following components and parts:

• power electric motor 380 V;
• floor stand – 358 kg;
• start and stop control buttons;
• two abrasive wheels and their protection;
• protective casing for the housing;
• lighting elements.

Main mechanisms of the unit:

• rotor;
• starter.

A modern 3K634 machine has a main unit responsible for the rotation of roughening, grinding and grinding wheels - a head with a two-speed electric motor. The housing with two covers houses the rotor, fan, stator and motor shaft; it replaces the spindle.

The fan is protected by a special casing to ensure safe operation; the cover is hinged to facilitate repairs or access to the object.

The 3K634 machine is equipped with a spindle support, due to which the wheels rotate accurately. Additionally, this element is responsible for the strength and reliability of the equipment of the entire unit. The supports have fatty grooves on the inside and axial labyrinth elements on the outside.

Since the engine heats up during operation, the manufacturer provides a fan that effectively cools it with circulating air flows inside the head and frame.

3KS floor-mounted grinding and grinding machine. Purpose, scope

The 3K634 sharpening and grinding machine replaced the outdated machine model 3B634

.

The sharpening and grinding machine with two wheels model 3K634 is designed to perform the following operations:

• sharpening of high-speed cutters equipped with carbide plates with a height of up to 100 mm;
• sharpening drills with a diameter of 6..60 mm;
• sharpening of metalwork tools;
• removal of burrs, chamfers and other metalwork works;
• grinding parts with an abrasive belt;
• polishing parts

It is not recommended to use the machine for stripping cast and welded parts.

Design features and operating principle of the machine

Photo of sharpening and grinding machine 3k634

The main part of the machine is the head (Fig. 5). A two-speed electric motor is mounted in the head, the shaft of which is the spindle of the machine. The stator, rotor and fan impeller are located in a housing with two covers, which house ball bearing spindle supports (Fig. 6).

Ball bearing supports are double high-precision angular contact ball bearings No. B36209L with selected axial play. Axial labyrinth seals are made on the outer sides, and fatty grooves on the inner sides.

The electric motor is cooled by air circulation, for which the head support covers have windows connecting the internal cavities of the frame and the head. For fastening protective covers and some devices (for polishing, belt grinding, etc.) there are two trunnions on the head covers. The head is fastened to the frame using pins.

The frame is a cast iron with an electrical cabinet housed in it. A panel with electrical equipment is reinforced inside the frame. Access to electrical equipment is possible due to the presence of an opening in the front wall, hermetically sealed with a door.

Grinding wheels of types 1-400 x 50 x 203 (flat straight profile) and 5-400 x 60 x 203 (flat with recess) are installed on the machine The circles are mounted on adapter flanges mounted on the conical part of the spindle. The adapter flanges on the outside have three crackers, with the help of which the grinding wheels are balanced.

Grinding wheels are protected by protective covers made of sheet steel.

On the front wall of the casing there is a gap for access to the grinding wheel. In the upper part of the throat there is a visor, with the help of which a gap of no more than 6 mm is maintained between the visor and the grinding wheel, in the lower part of the throat there is a retractable flap for dust suction. When installing a device for sharpening drills, the flap is completely pushed into the casing. The side wall of the housing is hinged to the housing and can be quickly removed for replacement and inspection of the grinding wheel.

At the bottom of the casing there is a dust collector, which collects up to 40% of the dust sucked from the operating area of ​​the machine. The dust collector must be cleaned of accumulated dust at least once per shift.

The casing is equipped with a pipe for connection to the exhaust system. A bushing for fastening the protective screen is welded to the top of the casing.

The protective screen (Fig. 9) is made integral with the lamps. For ease of use, the screen can be rotated about the horizontal axis by 15°. The lamps are equipped with two 41.6 W lamps, providing good illumination.

For sharpening cutters and cleaning parts, the machine is equipped with a rotary table (Fig. 10) and a tool rest (Fig. 11). The turntable is a steel plate screwed to a cast iron bracket that can move along a curved guide. Thus, the table can occupy an inclined position relative to the end of the grinding wheel. The table guide is attached to a bracket, which, in turn, is attached to the bed. As a result of two movements of the table in the horizontal plane, wear of the circle along the end and side surface is compensated.

The tool rest is a steel part with two working surfaces: flat and curved. It is recommended to use a flat working surface when grinding parts that have a supporting plane. If you need to grind the curved surface of a part in the absence of a good reference plane or if you need to frequently readjust the angle of the tool rest, you need to use a curved working surface of the tool rest. The attachment of the hand rest to the bracket is made in such a way that it can move in a circle, vertically and rotate around an axis. It is necessary to ensure that the gap between the circle and the tool rest is no more than 3 mm.

Grinding and grinding machines. General information

Synonyms: sharpening machine, electric sharpener, emery, grinding machine.

Sharpening and grinding machines are designed for manual sharpening and finishing of metal-cutting woodworking and other tools (drills, cutters, knives) with abrasive, diamond and CBN wheels. Grinding and grinding machines can be used for deburring, chamfering, cleaning and stripping parts, and manual grinding.

Depending on their purpose, sharpening machines can be divided into three groups:

• small desktop sharpening and grinding machines with grinding wheels with a diameter of 100-175 mm, used for sharpening and grinding small tools
• medium floor-mounted grinding and grinding machines with grinding wheels with a diameter of 200-350 mm, used in mechanical engineering for sharpening the main types of cutters
• large industrial grinding machines with wheels with a diameter of 400 mm or more, used mainly for manual grinding of parts, and also as roughing and grinding machines.

Sharpeners can be equipped with devices for sharpening drills, and grinding machines can be equipped with devices for belt grinding, polishing and dressing wheels.

By installing a polishing pad, grinding machines allow polishing.

Unit features

The bed is made of cast iron. All important elements are located inside the part. Access is provided through a special window in the front part, which is closed with a special lid.

To fix the wheels on the spindle, adapter flanges with three crackers on the outside are used, which help with balancing.

The instruction manual prohibits operating the machine without protective covers made of steel.

The casing is equipped with two visors made of organic glass. To collect dust that is generated during the processing process, retractable dampers and dust collectors connected to the hood are used. This helps reduce dust accumulation by up to 40% during roughing and grinding work.

Transparent screens with protective functions are equipped with lighting using a lamp. The passport recommends using 41.6 W lamps in this case.

To change the circles, no additional effort is required; you just need to fold back the side of the metal protection.

The set of the grinding and grinding machine model 3K634 includes:

• turntable;
• handyman

These elements allow sharpening of turning cutters up to 100 mm high. During operation of the 3K634, strong vibration occurs, which requires specialists to be fully aware of the load-bearing capacity and strength of the floor covering. Before installation, a proper installation plan must be developed.

Equipping the machine with special equipment

The 3K634 machine is equipped with additional equipment - a support table, which is used to sharpen drills with an allowable diameter from 6 to 60 mm. It is also possible to carry out operations for chamfering and polishing workpieces with a preliminary selection of the operating mode of the machine.

Basic parameters for processing workpieces:

1. Processing of the workpiece using the optional 300 cm sanding belt.
2. Sharpening of cutters with parameters from 6 to 100 mm.
3. Use of abrasive wheels with indicators:
   D- 400 mm;
4. H – 50 mm;
5. Dpos. - 203 mm.
6. Sharpening of various drills with a permissible angle from 70° to 140°.
7. Machining parts using a special polishing wheel with characteristics:
   D-400 mm;
8. H-55 mm;
9. Dpos.-50 mm.
10. Spindle performance characteristics:
    permissible processing speed – 30 m/min.
11. shaft rotation speed – 1440 rpm.

The 3K634 machine is used mainly for processing individual small batches of parts and when carrying out repair work.

This is interesting: Tile drills and features of drilling ceramic tiles

Advantages

The 3K634 sharpening and grinding machine has the following advantages:

• simplicity of design;
• multifunctionality;
• versatility;
• quality of equipment and its components;
• ease of installation and operation;
• accuracy of work;
• safety;
• attractive price;
• reliability and strength;
• long service life.

Operating rules

Before using the machine, you must perform the following steps:

• Install the equipment on a level surface, without additional elevation.
• Provide the room with a 380 V electrical network; it is operational for 3K634.
• Take care of forced ventilation.
• When connecting, check the correct rotation.
• Check the functionality of the circuit breaker, which provides overload protection.

Before operating the machine, the operator must undergo appropriate training. Since the electrical part wears out during long-term operation, personnel must periodically check these elements of the machine.

When starting up new equipment for the first time, wipe it with a rag soaked in acetone or gasoline to remove the anti-corrosion coating. After checking the serviceability of all elements, specialists launch it.

It is imperative to balance the abrasive wheels, which, when rotating, should not create a feeling of beating.

Preparing for the first launch

When installing a new model, before use, it is necessary to wash off the anti-corrosion coating with a rag soaked in gasoline or acetone. The electrical and mechanical components of the machine are then checked. After this, you can carry out the first test run.

A prerequisite is the balancing of abrasive wheels. There should be no beats during their rotation. This is checked manually by turning the pulley rotor and visually observing a possible change in the gap between the wheel and the protective casing.

To control the correct operation of the sharpening and grinding machine, idle running is performed for 10 minutes. If no external changes or defects have been recorded, proceed to processing of tools, parts or workpieces.

The video describes in detail the design of grinding machines of this type and the parameters for choosing abrasive wheels:

Safety precautions

To safely use the 3K634 roughening, grinding and grinding machine, the following rules must be observed:

• Installation of equipment is carried out only on a level basis.
• The place where the machine works must be equipped with forced ventilation.
• The unit must be grounded.
• The machine must not be left unattended while the engine is running.
• You should leave the room only after the engine has completely stopped.
• Periodically, all equipment mechanisms are cleaned of abrasive dust.

Operating restrictions

Persons operating the machine must know its design, operating rules within the scope of this manual and safety requirements.

It is not allowed to operate the machine if it is mechanically faulty, if the grounding is damaged, or if there are no protective covers or safety devices.

Only persons of the appropriate profession, specialty and qualifications who have undergone instruction and training should be allowed to operate the machine.

The deflection of V-belt drive belts should be within 25-30 mm, when pressing the belt with a force of 70-90 N.

Before installation on the machine, new grinding wheels must be tested for compliance with the requirements of GOST 2424 “Grinding wheels. Technical conditions" and GOST R 52588 "Abrasive tools. Safety requirements".

It is prohibited to use grinding wheels with cracks on the surface, as well as those without a mechanical strength test mark or with an expired shelf life.

Before installing new grinding wheels on the machine, it is necessary to test them on a bench.

Installation of grinding wheels should only be carried out by specially designated and instructed workers. The fastening flange screws should be tightened sequentially in pairs using a normal-length wrench. The gap between the circle and the lower edge of bracket 15 should be no more than 6 mm.

You can start working on the newly installed circle only after a 5-minute test at idle speed.

It is forbidden to slow down the rotating circle by pressing on it with any object.

It is prohibited to reinstall the tool rests while the machine is running.

The machine and the devices included in its composition must have reliable grounding. The quality of grounding is checked by external inspection and measuring the resistance between the metal parts of the machine and the grounding clamp at the input to the machine. Grounding resistance is no more than 0.1 Ohm.

Preparing the machine for use

Before operating the machine, check:

• serviceability and completeness of the machine;
• serviceability of grounding, supply cable and plug;
• reliability of fastening of grinding wheels, protective covers and supports;
• serviceability of the dust collector exhaust device.

The tool rests must be installed so that the upper point of contact of the workpiece with the grinding wheel is above the horizontal plane passing through the center of the wheel, but not more than 10 mm. The gap between the edge of the tool rest and the grinding wheel should be less than half the thickness of the work being sanded, but not more than 3 mm.

Hand rests must be securely fastened. Rearrange the tool rests only when the machine is stopped.

Reviews from masters

Alexander, Novgorod: “The 3K634 sharpening and grinding machine is Soviet quality and reliability, with no plastic parts, since the body is made of cast iron. The equipment is convenient to use not only for industrial needs, but also in small workshops or workshops.”

Zakhar, Samara: “Accuracy of operation, ease of operation and reasonable price make the machine attractive to many specialists in the country. I have a small workshop, which is equipped with a number of necessary machines and tools, including 3K634, it makes work more productive and uninterrupted. A really good unit that has never let us down.”

Igor, Pskov: “The 3K634 machine is an excellent assistant, the unit is distinguished by high quality and excellent technical characteristics, as well as an affordable price. We have been using the equipment for several years and have had no complaints. Accurate operation, many useful functions. No plastic, only durable and reliable metal. It is worth emphasizing that the machine is produced by a plant with years of accumulated traditions.”