What is the difference between a combination machine and a machine tool

Transfer and unit machine is a semi-automatic or automatic special machine tool based on general components, with special components and fixtures designed according to the specific shape and processing technology of the workpiece.

Compared with general special machine tools, combined machine tools have the following characteristics.

1) Since the general parts account for 70% and 90%, not only the design and manufacturing cycle is shortened, but also when the product is updated, the combination machine tool may be modified, and the general parts can also be reused.

2) General parts can be specialized in production, so that the cost is reduced, and it is conducive to improving the quality and performance of general parts.

3) The design of general parts is verified by production practice, the work is reliable, and the maintenance and spare parts work can also be simplified.

4) Due to the wide adaptability of general components, the specifications are not formulated for a single machine tool. When the same process scheme and similar overall layout are used, the combined machine may be slightly more complex and slightly larger than the individually designed special machine tool.

Compared with general-purpose machines, combination machine tools have the following characteristics.

1) According to the specific workpiece design, the most reasonable process scheme can be adopted, and the processing quality is stable.

2) It is suitable for multi-axis processing of many holes at the same time, which not only improves labor productivity, but also improves the position accuracy of the hole system, which is conducive to assembly.

3) It is convenient to carry out multi-sided processing of parts, realize a high degree of process concentration, and reduce auxiliary time.

4) The combined machine tools mostly work in semi-automatic or fully automatic mode, which is convenient for multi-machine tool management and easy to incorporate into the automatic line.

Combined machine tools are widely used in large quantities of cattle industry, such as automobiles, tractors and other manufacturing industries, at present, combined machine tools are developing in the direction of high efficiency, high precision and high automation.

The basic theories and methods of metal cutting machine tool design are also applicable to the design of combined machine tools. Due to the particularity of the combined machine tool, the overall scheme design must be highlighted when discussing the design of the combined machine tool.

Finally, it should be noted that the combined machine tool is a kind of high-efficiency special machine tool, which has specific conditions of use, and cannot receive good economic benefits under any circumstances. Before deciding on the design of a combination machine, a specific techno-economic analysis should be carried out.

Combined machine tools generally adopt multi-axis, multi-tool, multi-process, multi-face or multi-station simultaneous processing, and the production efficiency is several times to dozens of times higher than that of general machine tools. Since common parts have been standardized and serialized, they can be flexibly configured as needed, which can shorten the design and manufacturing cycle. Therefore, the combined machine tool has the advantages of low cost and high efficiency, and is widely used in mass and mass production, and can be used to form an automatic production line.

Combination machine tools are generally used to process box or special shape parts. During machining, the workpiece generally does not rotate, and the rotary motion of the tool and the relative feed movement of the tool and the workpiece are used to realize drilling, reaming, countersinking, reaming, boring, milling plane, cutting internal and external threads, and processing of outer circle and end face. Some combined machine tools use turning heads to clamp the workpiece to rotate it, and the tool is used for feed movement, and the outer circle and end face processing of some rotary body parts (such as flywheels, automobile rear axle half shafts, etc.) can also be realized.

The combination machine is combined, and the machine tool is monolithic!

Dear, I am glad to answer the characteristics of the combined machine tool as follows: the design of the combined machine tool only needs to select general parts, components and design and manufacture a small number of special parts, components, shorten the design and manufacturing cycle, good economic effect. The general parts and components selected in the combined machine tool have been tested by long-term production, and their structure is stable, reliable and easy to use and maintain.

General zero and part of the combustion parts are generally produced in batches by specialized manufacturers, with low cost and reduced equipment investment costs. When the processed parts are changed, the general parts of the combined machine tool can be reused, which is conducive to the renewal of products and improves the utilization rate of equipment. The combination machine tool is easy to connect into the automatic line of the combination machine tool to meet the needs of mass production.

Combined machine tools are special machine tools based on serialized and standardized general components and composed of a small number of special components. It is suitable for processing one or several processes of one or a similar part in mass and mass production. This kind of machine tool not only has the characteristics of simple structure, high productivity and high degree of automation of special machine tool, but also has a certain ability to readjust to meet the needs of the workpiece.

The combination machine tool can perform multi-faceted, multi-spindle machining of the workpiece, which is generally semi-automatic.

The basic components of a combination machine are universal components. Generic parts are designed and manufactured according to the principles of standardization, serialization and generalization with specific functions. There is a matching relationship between various general parts, and they can be used with each other when composing various combined machine tools.

According to the function, general components can be divided into power parts, support parts, conveying parts, control parts, auxiliary parts, etc.

1) Power components. The power component is the general component that transmits power and realizes the main motion or feed movement, it is the most basic component in the general component, and the power component that realizes the main motion has a power box and a variety of cutting heads that complete special functions, such as drilling heads, milling heads, boring heads, etc. The power box is often used in conjunction with a dedicated component multi-axle box to achieve the main movement.

The power component that realizes the feed movement is the power slide.

2) Supporting parts. Supporting parts are general components used to install power parts, conveying parts, etc., including side bases, columns, column bases, intermediate bases, etc. The middle base is used to install fixtures and conveying parts, and the side base is used to install power slides and various cutting heads to form a horizontal machine tool.

If you use a column instead of a base, you can assemble a solid machine.

3) Conveying parts. The conveying component is a universal component of a multi-station combination machine tool that is used to install the workpiece and transport it to a predetermined station, such as a mobile table, an indexing rotary table, and an indexing rotary drum.

4) Control components. The control components include various hydraulic control elements, control panels, electrical stoppers, button stations, etc., which are used to control the combined machine tool to achieve the working cycle according to the specified procedures.

5) Auxiliary parts. The auxiliary components mainly include auxiliary devices such as cooling, lubrication, and chip removal, as well as various mechanical wrenches that realize automatic clamping.

The multi-spindle box is a special component of a combination machine tool, which consists of special parts and general parts. The position of each spindle of the multi-axle box is designed according to the hole on the machined part, and its function is to transmit the movement from the power box to each spindle so that it can obtain the required speed and steering. The multi-axle box is divided into two categories: general multi-axle box and special multi-axle box, most of the parts of the general multi-axle box are general parts, using non-rigid spindle, and the tool is guided by the guide sleeve to ensure the accuracy of being processed; Most of the parts of the special multi-axle box are special parts, using a rigid spindle, relying on the spindle assembly to ensure the accuracy of the machining hole.

The difference between CNC lathes and ordinary lathes.

1. Fully enclosed or semi-enclosed protective device is used on CNC lathes to prevent chips or cutting fluid from flying out, which can bring accidental injury to the operator.

2. Adopt automatic chip removal device Most of the CNC lathes adopt the layout of inclined bed structure, which is convenient for chip removal and convenient for the use of automatic chip removal machine.

3. The spindle speed is high, and the workpiece clamping is safe and reliable. Most of the CNC lathes use hydraulic chucks, which is convenient and reliable to adjust the clamping force, and also reduces the labor intensity of the operators.

4. Automatic tool change CNC lathes all use automatic rotary tool holders, which can automatically change tools during the processing process and continuously complete the processing of multiple processes.

5. The main and feed transmission are separated The main drive and feed drive of the CNC lathe adopt their own independent servo motors, which makes the transmission chain simple and reliable, and at the same time, each motor can move separately and can also realize multi-axis linkage.

Compared with ordinary machine tools, CNC machine tools have the following characteristics:

1) Pros. 1.High machining accuracy and high processing quality;

2.It can carry out multi-coordinate linkage and process parts with complex shapes;

3.When the processed parts are changed, generally only need to change the CNC program, which can save production preparation time;

4.The machine tool itself has high precision and rigidity, and can choose a favorable processing amount, and the productivity is high (generally 3 5 times that of ordinary machine tools);

5.The machine tool has a high degree of automation, which can reduce labor intensity;

6.Mass production, product quality is easy to control;

2) Disadvantages. 1.The quality requirements for operators are low, and the technical requirements for maintenance personnel are high.

2.However, its machining route is not easy to control and is not as intuitive as ordinary machine tools.

3.Its maintenance is inconvenient, and the technical requirements are high;

4.The process is not easy to control.

Transmission mode: gear drive, belt drive; Direct connection.

Headbox: motor + spindle gearbox + spindle; Motor + spindle feed mechanism: motor + feed gearbox + lead screw; Motor + coupling + lead screw with or without gear carrier: Yes; Not.

Mechanical Complexity : Complex ; Simple.

Summary. CNC milling machine is an automatic processing equipment developed on the basis of general milling machine, the processing technology of the two is basically the same, and the structure is somewhat similar. CNC milling machines are divided into two categories: without tool magazine and with tool magazine.

Among them, the CNC milling machine with a tool magazine is also called a machining center. In addition to the characteristics of ordinary milling machine processing, CNC milling processing also has the following characteristics: machining center.

1. The adaptability and flexibility of parts processing are strong, and the parts with particularly complex contours and shapes or difficult to control the size can be processed, such as mold parts, shell parts, etc.;

2. It can process parts that cannot be processed by ordinary machine tools or are difficult to process, such as complex curve parts described by mathematical models and three-dimensional space surface parts;

What is the combination of machine tools?

CNC milling machine is a kind of self-starting processing equipment developed on the basis of general milling machine, the processing technology of the two is basically the same, and the structure is somewhat similar. CNC milling machines are divided into two categories: without tool magazine and with tool magazine. Among them, the CNC milling machine with a tool magazine is also called a machining center.

In addition to the characteristics of ordinary milling machine processing, CNC milling processing also has the following characteristics: machining center 1, parts processing adaptability, good flexibility, can process parts with particularly complex contour shape or difficult to control the size, such as mold parts, shell parts, etc.; 2. It can process parts that cannot be processed or difficult to process by ordinary machine tools, such as complex curve parts and three-dimensional space surface parts described in mathematical models;

3. It can process parts that need to be processed in multiple processes after a clamping and positioning; 4. The precision of the sail bucket is high, the processing quality is stable and reliable, the pulse equivalent of the numerical control device is general, the high-precision numerical control system can reach, in addition, the numerical control machining also avoids the operator's operation error; 5. The high degree of production automation can reduce the labor intensity of the operator. It is conducive to the automation of production management; 6. The production efficiency is high, the CNC milling machine generally does not need to use special process equipment such as special fixtures, and only the processing program, clamping tools and adjustment tool data stored in the numerical control device need to be called when replacing the workpiece, so that the production cycle is greatly shortened. Secondly, the CNC milling machine has the functions of milling machine, boring machine and drilling machine, which makes the process highly concentrated and greatly improves the production efficiency.

In addition, the spindle speed and feed speed of the CNC vertical car milling machine are continuously variable, so it is conducive to selecting the best cutting amount.