Centerless cylindrical grinding characteristics form

1. Two-wire External Grinding center hole does not play, do not support the workpiece thimble. Since the center of the workpiece uncertain, the grinding allowance is relatively reduced.

2. External grinding mill can not axially grooved workpiece, grinding perforated workpiece, does not correct the position of the hole axis, low concentricity of the workpiece.

3. Cut inside his cell under normal circumstances can only be processed on a roller rolling on the workpiece can therefore, particularly suitable for grinding sets of groups, and other thin-walled parts. Grinding sets of parts because the parts are positioning themselves cylindrical reference. Therefore it can not be corrected within the original uranium with external error between.

4. Centerless grinding time maneuvering and loading and unloading time coincidence, easy to implement grinding process automation, high production efficiency.

 

5. In the centerless grinding process, the change in position of the workpiece center depends on the size of the original error of the workpiece before grinding, process system rigidity, grinding, dosage and other process parameters (high workpiece center, pallets angle, etc.);

6 centerless grinding movement of the workpiece, the machine depends on the uniformity of the transmission chain, the workpiece shape, weight, guide wheels and supporting materials, surface morphology, grinding with a star and other process parameters.

7. Centerless grinding machine for a long time to adjust, to adjust the machine's technical requirements are also higher, does not apply to single and small batch production.

Grinding wheel introduction

Grinding wheel is a circular fixed abrasive tool, which is made of abrasive and binder. The characteristic of the grinding wheel is determined by the factors such as abrasive, grain size, hardness, bond, shape, size and so on. A wide variety of grinding wheel, according to the abrasive can be divided into ordinary abrasive (corundum and silicon carbide, etc.) grinding wheel and natural abrasive super hard abrasive and (diamond and cubic boron nitride, etc.) grinding wheel; Shape can be divided according to flat shaped wheel, bevel wheel, wheel cylinder, cup wheel, disc wheel, etc., and according to the bond can be divided into ceramic grinding wheel, resin grinding wheel, rubber wheel, grinding wheel, metal.

The characteristic parameters of the grinding wheel mainly include abrasive, grain size, hardness, bond, shape, size and so on. Since the grinding wheel usually work at high speed, it should be carried out before the use of rotary test (to ensure that the grinding wheel at the maximum operating speed, not broken) and static balance test (to prevent the work caused by machine vibration). After working for a period of time, the grinding wheel should be trimmed to restore the grinding performance and the correct geometry.

Advances in resin grinding wheel processing

Recently developed for the synthesis of binder alumina ceramic grinding wheels,with the less binding agent, and increases the porosity of the grinding wheel. The composition of the components to ensure the consistency and hardness of the structure.

Advances in resin grinding wheel processing

In the current gear grinding, still in use by ordinary abrasive. But the standard abrasive and aluminum oxide ceramic product productivity has been greatly improved. Sintered ceramic and single crystal aluminum oxide, synthetic binder, and the development of new grinding technology, this progress has contributed.

In the last 10 years, more and more people use powerful creep feed grinding mode processing involute. Compared with the hitherto conventional reciprocating grinding, grinding wheel contact area is much greater, therefore, the use of the wheel must be able to withstand high pressures. Only when subjected to a sufficiently high pressure on a single abrasive grit it may become a pointed.

Pneumatic Grinder Wheel Requirements

1, staff must wear a dust mask.

2, the use of grinding wheel workpiece, first start until normal idle, and then by the light and heavy get confide in prison, so that the force evenly. But the pressure can not be too large or bump violently, so as not to hurt broken wheel.

3, the workpiece when grinding wheel rotational direction on both sides allowed to stand, so as not to fire into the sand splashing wounding.

4, after the work is completed, close valves, the grinder placed into a dry safe place. So as not to damp wheel, then burst wounding.

5, pneumatic tools automatic shut-off valves should be kept intact to ensure that at the time of operation, only forced to start start to work.

6, pneumatic tools should be someone responsible for inspection, storage, regular maintenance.

7, prohibits casually start grinding wheel or something else beat impact wheel, when changing the wheel, check the wheel for cracks to pad level folder in prison.

8, not allowed to use unqualified wheel.

9, clean up, clean up with a brush to stop.

what type of abrasive The Grinding wheel is ?

Grinding wheel is the most important piece of a class of abrasive, then the following knowledge from the factory to talk about it grinding wheel:

Grinding wheel is to add a binder in the abrasive, the porous body through compacts made of dried and calcined. Due to the abrasive, bond and different manufacturing processes, characteristic differences between the grinding wheel is large, so the grinding process quality, productivity and economy have an important impact.

Characteristics of grinding wheel is mainly determined by the abrasive particle size, binder, hardness, structure, shape and size and other factors; abrasive wheel is the largest amount, the most widely used method of using surface rotating at high speed when used, can be of metal or cylindrical, round, flat face and a variety of other non-metallic type workpiece roughing, semi-finishing and fine grinding and grooving and cutting and so on.

The press can be divided into ordinary abrasive abrasive (corundum and silicon carbide) abrasive grinding wheel and the natural and super abrasive (diamond and cubic boron nitride grinding wheel) wheel; according to the shape can be divided into flat-shaped grinding wheel, bevel wheel, cylindrical grinding wheel , cup wheels, disc wheel and so on; press binding agent can be divided into ceramic wheel, resin wheel, rubber wheel, metal grinding wheel. The main parameters of the abrasive wheel, viscosity, hardness, binding agents, shape, size and so on.

In the production process to use diamond grinding wheel on the belt, the general grinding wheel is necessary to remove the cleaning operation for 5-7 days, there is grinding down rubber crumbs above, after the high temperature friction and firmly attached to the diamond surface, it is difficult cleaning.

Cleaning requirements: (1) to environmental protection, non-one can not be a halogenated hydrocarbon. (2) can not damage the diamond grinding wheel.

Safety matters in Surface grinder wheel using

Should be checked before using the machine automatically about whether homing lever, when actuated, about whether someone; grinding wheel is solid; the choice of surface grinder dedicated repair wheel dresser;

Before machining a workpiece, it should work to remove the burr of the workpiece and the working platform must be clean;

Wheel stops turning when not prohibited under the wheel rub working platform handling the workpiece; pre-processing, the disk is not flat;

After the work place, pay attention to whether the fixed magnetic suction; suction magnetic movable workpiece, the application stoppers fixed;

When the grinding wheel, workpiece or not put items not related to work on the platform;

When the machine automatic feed, the operator will be allowed to leave their jobs or doing unrelated things; unavailable items beat internet; work which must be handled with care; cleaning the machine, do not use air gun wiping; machine per job 1 hour, hand pumps required to guide oil plus 1 times.

3.2 grinding operation procedures in strict accordance with the operation (1) the operating handle or button must be carefully checked before driving is in the correct position, the movement of the grinding machine is normal. (2) grinding wheel should be the first to the installation of new work for idle running speed. Idle running time is: A. a diameter of 400 mm, or more, idle time is greater than 5 mins, B. diameter < 400 mm, the idle time is greater than 2 min. (3) check carefully before grinding by grinder piece in card is correct, tighten reliable, special attention should be paid to adjust stop position, and tighten, pay attention to prevent collision grinding wheel chuck, chuck or top. (4) grinding, should in the workpiece and grinding wheel is under a state of normal operation and feed (feed may not be too hard); Also, must be in after the blade to stop.