April 2020 – Page 8 – CNC Machining & Turning, Milling, Metal parts

Drive shaft for RC car, 4WD car, Monster Racer XXL

Drive shaft for RC car, 4WD car, Monster Racer XXL.

Upgrade metal parts rear shock plate for desert truck

Upgrade metal parts rear shock plate for desert truck. We produce according to the customer’s drawings.

Front and rear metal parts shock absorber for Monster Racer XXL

Front and rear metal shock absorber, shock absorber metal parts

Front and rear metal shock absorber, shock absorber metal parts upgrade accessories for RC car, 4WD car, Monster Racer XXL. We produce according to the customer’s drawings.

Development of manipulator fixture

The mechanical manufacturing industry has a long development process. From the simple stone building in the ancient times to the numerical control processing in the modern industry, it is still free of the manual workshop’s homework method and enters the production stage of group production and specialized cooperation. With the change of manufacturing mode, the manipulator fixture has also experienced reform.

The earliest manipulator fixture is a special fixture mode. After the development of an era, with the development and demand of processing technology, the organization of fixture, general fixture, gradually appeared in various manufacturing enterprises. In recent years, due to the increasing implementation of numerical control equipment and the increase of processing strength and efficiency of products, the production cycle of special fixture is long, and the line points with large storage area are emerging, which makes the traditional manipulator fixture still become the barrier of production efficiency and economic benefit development of various manufacturing enterprises (look for vacuum sucker manufacturers to recommend GADA company).

At the same time, in the small batch production of a single piece, due to the small batch, the design and manufacture of manipulator clamps add research and development costs and lengthen the production cycle. Therefore, the most commonly used production mode at this time is simple production, that is, the local law on horseback guarantees the production demand at the expense of the production of goods. This is obviously not suitable for the needs of social development in today’s high-speed development of science and technology. In order to make the overall digitalization and modern processing technology of the enterprise can get faster development, it is necessary to integrate the manipulator fixture design with digitalization and modern processing technology, so KBE fixture must be vigorously promoted. As long as we can deal with a series of problems in the design and manufacturing process of manipulator fixture, many difficult problems in the manufacturing process of enterprise main products will be solved.

How to clamp the gauge standard parts

1: Clamping mode of horseshoe indenter: the material of the chuck is aluminum, and the opening should be greater than 6.5mm. This mode is usually used by people’s inspection tools. The three coordinate measuring machine can measure the base square of RPS positioning surface. In order to achieve this goal, the clamp arm should not exceed the base of RPS positioning surface, otherwise the three-dimensional probe will be blocked by the clamp arm and affect the measurement. In addition, if there is positioning or inspection pin on the positioning surface, it should be noted that the chuck should not interfere with the positioning or inspection pin to affect the maneuverability when the clamp is opened.

2: Positioning surface and clamping: in principle, each positioning surface shall be clamped locally. The clamping point shall be located at the base of the positioning surface, and the clamping target of the clamp of the gauge guideline piece shall be the same as the normal direction of the positioning surface. If the angle between the locating surface and the supporting surface of the clamp is less than 5 degrees, it can be ignored. If it is more than 5 degrees, the clamping target of the clamp and the normal direction of the locating surface should be the same.

3: Flat push type clamp: including clamp and tension spring clamp. In general, we should think about clamp.

Surface treatment technology of metal parts processing

Contact resistance heating and quenching: at the beginning and the end of the electrode, the voltage less than 5 V is applied to the workpiece, and a large amount of resistance heat flows through the contact between the electrode and the workpiece, so that the workpiece surface is heated to the quenching temperature, and then the electrode is removed, and the heat is transferred into the workpiece interior and the surface is cooled rapidly, that is to say, the quenching target is reached. When the long workpiece is processed, the electrode moves forward continuously, and the part left behind is hardened continuously. The advantages of this method are simple equipment, simple operation, easy automation, small distortion of the workpiece, no need for tempering, which can significantly improve the wear resistance and scratch resistance of the workpiece, but the hardening layer is relatively thin (0.15-0.35mm). The average of microstructure and hardness is poor. This method is mainly used for surface hardening of machine tool guide rail made of cast iron, and the use boundary is not wide.

Electrolytic heating and quenching: place the workpiece in the electrolyte of acid, alkali or salt water solution, connect the workpiece to the cathode, and connect the electrolytic cell to the anode. After the direct current is connected, the electrolyte is electrolyzed, oxygen is released on the anode, and hydrogen is released on the workpiece. Hydrogen around the workpiece causes gas film, which becomes a resistance body and generates heat. The surface of the workpiece is heated to the quenching temperature quickly, and then the power is cut off. The gas film dissipates immediately, and the electrolyte becomes the quenching medium, which makes the surface of the workpiece cool and harden rapidly. The commonly used electrolyte is an aqueous solution containing 5-18% sodium carbonate. The electrolytic heating method is simple, the processing time is short, the heating time is only 5-10 seconds, the production rate is high, the quenching distortion is small, it is suitable for a large number of small parts, and it has been used for the surface quenching of the exhaust valve rod end of the engine.

Laser heat treatment: the use of laser in heat treatment began at the beginning of the 70’s, and then entered the stage of production and use from the stage of laboratory discussion. When the laser with high energy density (106 w / cm2) is focused on the metal surface, the metal surface rises to the quenching temperature in a few percent seconds or even a few thousandths of a second. Due to the unique fast temperature rise of the mapping point, the heat is not enough to transmit to the surrounding metal, so when the laser mapping is stopped, the metal around the mapping point will play the role of quenching medium and absorb a large amount of heat, so that the mapping point will be cooled rapidly, and get very fine structure, with high mechanical function. If the heating temperature is high enough to melt the metal surface, a smooth surface may be obtained after cooling. This operation is called polishing. Laser heating can also be used for one-sided alloying, that is to say, plating a layer of wear-resistant or heat-resistant metal on the parts that are easy to wear or need heat resistance, or coating a layer of coating containing wear-resistant or heat-resistant metal, and then using laser mapping to make it melt rapidly, resulting in wear-resistant or heat-resistant alloy layer. A layer of chromium is first plated on the heat-resistant parts, and then the laser is used to melt it quickly, resulting in a hard tempering resistant chromium containing heat-resistant surface layer, which may greatly increase the service life and heat resistance of the workpiece.

Electron beam heat treatment: the beginning of the 70’s research and use. In the early stage, it is used for continuous annealing of thin steel strip and steel wire, with energy density up to 108W / cm2. Electron beam surface quenching should be carried out in vacuum, and other characteristics are the same as laser. When the electron beam bombards the metal surface, the bombardment point is heated rapidly. The depth of the electron beam through the raw material depends on the accelerating voltage and the density of the raw material. For example, a 150 kilowatt electron beam has a critical penetration depth of 0.076 mm on the iron surface and 0.16 mm on the aluminum surface. The electron beam bombards the surface in a short time, the surface temperature rises rapidly, while the substrate remains cold. When the electron beam stops bombarding, the heat transfers rapidly to the cold base metal, which makes the heated surface self quench. In order to effectively carry out “self cooling quenching”, a ratio of 5:1 should be maintained between the volume of all workpieces and the volume of quenching surface. The surface temperature and quenching depth are also related to the bombardment time. The heating speed of electron beam heat treatment is fast, and the time of austenitizing is only a few seconds or even shorter. Therefore, the surface grain of workpiece is very fine, the hardness is higher than that of normal heat treatment, and it has excellent mechanical function.

Steps and advantages of CNC processing samples

There are several processes for sample: CNC processing samples, 3D printing samples, silica gel replica samples, sheet metal samples, low-pressure injection samples, etc.Let’s briefly describe the pace and advantages of CNC processing samples.

Many people also call it the first mold for sample. Generally speaking, after an industrial product is designed, it is not put into manufacturing as soon as possible, but should first manufacture a small number of sample according to the drawings. The goal is to see the samples of the shaped products in advance. If not, then modify the drawings until there is no objection, and then start batch manufacturing. This small mold is the sample in the mouth.

The steps of CNC processing sample as follows:

1) Discuss the CNC processing value and delivery date, and sign the processing agreement.

2) Analyze the part drawing and product configuration drawing, and analyze the process of the part.

3) Select the blank.

4) CNC sample programming.

5) Confirm the machining allowance of each process, calculate the process size and yamen service.

6) Confirm the equipment and tools, clamps, measuring tools and auxiliary equipment used in each process.

7) Confirm the cutting amount and working time quota.

8) Confirm the technical requirements and inspection methods of each key process.

9) Fill in the process documents of CNC machining sample proofing.

CNC processing sample has the following advantages:

① Complex tooling is not required. If we want to change the form and size of the parts, we only need to modify the processing program of the parts, which can be used in the development and modification of new products.

② The processing quality of sijunda sample is stable, the processing precision is high, the repeated precision is high, and it is suitable for the processing requirements of high-precision products.

③ Under the condition of batch manufacturing, the manufacturing efficiency is higher, which can reduce the time of manufacturing planning, machine adjustment and process inspection.

④ It can be used to process complex surfaces which are difficult to be processed in conventional way, and even to process some processing parts which cannot be observed

Surface treatment technology of precision parts

In the essential work, the requirements for strength and toughness are relatively high. Its working function and service life are greatly related to its surface function. However, the improvement of surface function can not be achieved purely by relying on raw materials, and it is often uneconomical to do right and wrong. However, in the essential processing, its function must reach the criterion. At this time, surface processing technology is needed, which often can In recent years, the technology has also developed rapidly. In the mold surface treatment limit mold polishing technology right and wrong often important link, is also an important process in the workpiece processing process. The surface treatment process of careful parts is often important in the process of machining, so what are the surface treatment processes of careful parts?

It is worth mentioning that the polishing of the die surface of the careful parts is not only influenced by the process and polishing equipment, but also by the specularity of the raw materials of the parts, which has not been paid enough attention to in the current processing, which is also the footnotes, and the polishing itself is affected by the raw materials. Although the processing technology to improve the surface function of the well-rounded parts has been constantly upgraded, the most used in the processing of the well-rounded parts is still focused on the hard precipitation, nitriding and carburizing technology.

Because the nitriding technology can achieve a high level of surface function, and the nitriding technology has a high concordance with the quenching technology of the steel in the well-rounded parts, and the nitriding temperature is often low, so after the nitriding technology is processed, there is no need for intense cooling process, so the deformation of the well-rounded parts will be quite small, so the nitriding technology is also It is one of the earliest techniques used to strengthen the surface function during the careful processing of parts and components, and it is also the most common one currently used.

The above is the introduction of “surface treatment process of careful parts”, I hope to bring you positive assistance

The quality of gold parts processing is increasing

In the future, with the development of China’s construction machinery industry, providing users with high-performance, high reliability, high mobility, good maintainability and economic equipment has gradually become the goal of manufacturers. Therefore, in order to meet the personalized needs of users, manufacturers should adopt the production mode of multi variety and small batch to develop new products with high quality and low price at the fastest speed. The most effective way to realize the above requirements is to adopt modular design principle, method and technology.

Now the application of hardware parts processing is also more and more, and in the accessories, the scope of application is also very wide, no matter how to say, improve human-machine safety, driving comfort, convenient for driver operation and technical maintenance, which not only improves the working conditions of the driver, but also improves the production efficiency. Some countries have vibration, noise, exhaust gas of construction machinery New standards have been set for emission and anti rollover and falling objects. The machining range of mechanical parts and components, as well as the accuracy must be high. Why? Because customers have high requirements for quality. Do you think that customers will choose the machining of mechanical parts with poor quality? From the perspective of our product selection, we all choose the good products, which is the idea of many people now.

AC rotating axis function of five axis CNC Machinine

I believe that friends in the industry are familiar with five axis machining center. Five axis machining center has five motion coordinate axes, namely two motion rotation axes and three straight-line motion coordinate axes. Generally speaking, according to the different installation positions of two rotation movements, it can be divided into AC combined rotation axis and BC combined rotation axis. Next, I will introduce the working range of AC rotation axis of five axis machining center 。

Working range and advantages of AC rotating axis of CNC five axis machining center

Generally, the axis around the x-axis of the five axis CNC machining center is defined as the a-axis, whose working range is + 30 ° to – 120 °. The worktable of the five axis machining center is equipped with a rotation axis, which rotates around the Z axis. We define it as the C rotation axis. The working range of the C rotation axis is 360 degrees. For the five axis machining center with a rotating axis and C rotating axis, the workpiece can be clamped once to finish machining other than the mounting surface. Generally, the minimum graduation value of a-axis and c-axis is 0.001 degrees, so that there is no angle on other surfaces except the installation surface, and complex processes such as machining inclined surface and inclined hole can be carried out. It can be realized that a-axis and c-axis and XYZ linear three-axis can do five axis linkage machining, and then complex curved workpiece can be processed. Of course, good CNC system, servo motor system and software support are required.

Structure advantage of AC rotating axis setting in five axis machining center

The advantages of the above AC rotating shaft are simple structure, good rigidity of the main shaft and low manufacturing cost. Generally, the worktable can not be set too large, and the bearing capacity is also relatively small, especially when the rotating axis a rotates to 90 degrees or more, it will bring great bearing moment to the worktable when processing workpieces.