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Machine tools, mainly for processing methods and tools for classification, according to the national machine tool type preparation method, the machine is divided into 11 categories:
Lathes, drilling machine, boring machine, grinding machine, gear machine, screw machine, milling machine, planer, slotting machine, broaching machine, sawing machine.
In each machine, and according to the process, layout patterns and structural properties are divided into several groups, each group is divided into several series (series).
In addition to the above basic classification methods, there are other classification methods: According to the degree of versatility, the machine can be divided into:
1. General Machine Tool: This machine tool technology range is very wide, you can have a certain size parts within the scope of dealing with a variety of types, complete a variety of processes. For example, horizontal lathe, universal milling machine, universal cylindrical grinding machine.
2. Specialized machine tools: This machine process range is narrow, can only be used to deal with a different size or one (or several) specific treatment of several parts. Such as screw lathe, camshaft lathe and so on.

Safety performance of press machines and protective devices

Fine punch brake method for the pneumatic distribution brake, a serious stamping force from the LiMaDa instigated flywheel, flywheel driven crankshaft and momentum, so the punch manufacturers, in reality before the process, quiet, white air is to ensure precision punch function stable Of the basic location.

In the actual placement process, the beginning of occlusion of the air supply of the atmosphere stop valve, the press of the air pipe and the air supply pipe connected, and then need 0.5-0.7MPa of contraction of air, especially alert punch air pipe must be from Press the back of the connection line, the air pressure to 5kg / c ㎡. However, the isolation from the air source to the installation site must be within 5 meters. After the connection has been completed, first of all, try to output the air, search part of the pipe there is no dust and sewage water retention, this does not despise, unclean, stagnant air will form a solenoid valve mistakenly see, the cylinder rust, Easy to stimulate punching tranquility. Then, switch the main valve installed in the air connection hole air inlet.

Punch the use of human safety in the process of care, the use of hand-safe appliances may be designed to prevent the wolf and the construction of sudden accidents caused by stifling.

More common security tools: flexible clamp, special clamp, magnetic sucker, tweezers, pliers, hooks and so on. Protective measures for the mold include the provision of protective plates (hoods) at the edges of the molds and the creation of mold structures. Such as cutting the mold emergency area, exaggerating the safety space; set the rigid material installation, without affecting the strength of the mold and product quality under the premise of the fact that the manual feeding of a single process die to improve safety. In the punch equipment and molds to set up security protection devices or select the task intensity is small, easy to use clever hand tools, punching is also under the conditions of the end of stamping operations security effective measures. Such as the use of hand tools, mold protective cover, mechanical access devices, two-button switch, mechanical handle, push hands and hand device, photoelectric active protection devices. Stamping equipment, more protective devices, according to the structure is divided into mechanical, push-button, photoelectric, feeling and so on.
Mechanical precision punch protection device structure is simple, easy to create, but the punch on the job interference, the operator is not hobby use, application competition. Photoelectric device is a set of photoelectric switches and mechanical devices combined, when the operator’s hand to participate in the mold area, the beam hit the wall, the issue of electrical signs.

In the stamping equipment, safe disposal, first of all should agree to equipment protection and care system, so that equipment and safety devices on schedule for love. Before operation, check the operation of the equipment, safety devices, electrical appliances and the main pressing fasteners, etc., to observe whether the operation is normal, the equipment is “sick” operation.

In the production process of the stamping operation, it is necessary to strengthen the production placement, arrange the tasks, make reasonable production schedule and limit day according to the product structure and production scope, and ensure the balance and orderly production to avoid accidents caused by overtime.

what are CNC punch press maintenance techniques?

In addition to a reasonable mold structure, the use of years of numerical control die punching, high precision manufacturing, heat treatment and the correct choice of punch press mold installation accuracy of the influencing factors, the effect is good, the correct use and maintenance molds can not be ignored The following points:

(1) mold installation should be strictly checked before use to remove dirt, guide sleeve, mold check whether the lubrication is good.

(2) regularly on the punch turret and check the mold installation base, to ensure that the upper and lower turntable coaxial accuracy.

(3) Install the program according to the mold will die and punch on the turntable and to ensure that the same direction of the die, especially with the (non-circular and square) mode must work hard to prevent wrong loading, anti-installed.

(4) mold installation, should check the fastening screw mold mounting base locking.

Punch and die cutting (5) punch die edge wear should stop using, and timely grinding, or Henan punch will quickly expand the mold edge wear, accelerated wear, reduce the quality of punch and die life.

For mass production (6), the general use of molds should be backed up with rotating production to ensure the production required.

(7) News personnel to install the mold should use soft metal (such as copper, aluminum, etc.) operating tools to prevent the knocking of the installation process, hit the mold damage.

In the course of transportation to gently handle, dead (8), shall not touch the blade and guide to avoid damage to the mold.

(9) mold should be returned to the designated location after use, and oil rust treatment.

(10) to ensure that the service life of mold, mold spring should also be replaced regularly to prevent damage to the use of spring fatigue mold.

Effect of Machine Precision on Machining

A CNC machine tools and the performance of good or bad and NC function can play a direct impact on the normal use of machine tools. The high-precision CNC machine tools ultimately depends on the accuracy of the machine itself to ensure its accuracy, including geometric accuracy and cutting accuracy.
Therefore, the accuracy of CNC machine tools on the initial inspection of the use of CNC machine tools and maintenance of machine tools after the restoration of technical indicators is very important. Accuracy detection includes CNC machine tool geometric accuracy, positioning accuracy and cutting accuracy detection.
The following machine tool error, machine tool analysis of the accuracy test summary, so that we better understand the accuracy of the machine will produce what the impact of processing.
Geometric error of machine tools

Processing of the tool relative to the workpiece forming movement is generally completed by the machine, therefore, the workpiece machining accuracy depends largely on the accuracy of the machine.
Machine tool manufacturing errors on the accuracy of the workpiece have a greater impact: spindle error, rail error and drive chain error. Machine tool wear will reduce the accuracy of machine work.
(1) spindle rotation error, the machine tool spindle is the basis of clamping the workpiece or tool, and the movement and power to the workpiece or tool, the spindle rotation error will directly affect the accuracy of the workpiece being machined.
(2) rail error, the guide is to determine the relative position of the machine tool components on the benchmark, is the benchmark for machine tool movement. In addition to manufacturing errors of the rail itself, the uneven wear and installation of rail quality, but also to create an important factor in rail error.
The wear of guide rail is one of the main reasons for the decrease of machine precision.
(3) transmission chain error, transmission chain error is the beginning and end of the transmission chain between the components of the relative motion error. Generally used to measure the end of the transmission chain component angle error.

Such as when the accuracy of the machine parts processing requirements, often not blindly improve the accuracy of the machine, but from the process or on the fixture to find ways to create conditions that make the machine tool geometry error does not affect the transfer to the processing precision.
Such as grinding the spindle taper hole to ensure its coaxiality and journal, not by the rotation accuracy of the machine tool spindle to ensure, but by the fixture to ensure. When the machine tool spindle and the workpiece with a floating connection between the machine spindle after the original error was transferred out.

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