Multi-turret machining tool and turning method

Abstract

The invention belongs to the field of wheel machining, and particularly relates to a multi-turret machining tool and a turning method. The multi-turret machining tool comprises a tool body base, a workpiece spindle device and three machining devices. The workpiece main shaft device is arranged on the lathe bed base, the three machining devices are arranged on the workpiece main shaft device and distributed according to angles, all the machining devices can complete corresponding cutting work without difference, when different machining positions of a workpiece are machined, optimization can be carried out according to the actual machining duration, the efficiency of all cutters is maximized, and the machining efficiency is improved. The whole workpiece machining time is shortest, and the machining efficiency is highest. Through reasonable arrangement of the machine tool structure, simultaneous machining of three cutters is achieved, and breakthrough efficiency improvement of the bottleneck process of wheel machining is achieved, so that the machining efficiency of the other two machine tools is matched, optimal matching of unit rhythms is achieved, the utilization rate of the other two machine tools is increased, and unit output is improved.

Description

Technical Field

[0001] The invention belongs to the field of wheel processing, and in particular relates to a multi-turret processing machine tool and a turning method. Background Art

[0002] The existing wheel processing method is generally divided into three machine tools for processing. The three machine tools process different positions of the wheel respectively. Specifically, the processing technology is divided into three sequences. The first sequence processes the opening direction, and after the first sequence processing, it is flipped for the second sequence processing; the second sequence processes the front and outer contour; the third sequence processes the wheel hole-like parts.

[0003] Based on actual production needs, three machine tools are combined to form a closed processing unit for automated production. However, depending on the processing location and process technology of different wheel processes, the processing time of different processes within the unit varies, and the final processing cycle is usually determined by the cycle time of the longest process. With the increasing demand for lightweight wheels and end-user requirements for vehicle passenger comfort in recent years, wheel structures have also been changing year by year. As a result, more content is processed in the first sequence, and the processing time is increasing, forming a bottleneck process in the three-sequence process. According to statistics, approximately 70% to 90% of the wheel structures have a cycle time-limiting first sequence process, which greatly reduces the utilization rate of the other two machine tools and creates waste. Summary of the Invention

[0004] The present invention provides a multi-turret machining machine tool and a turning method to solve the problem of low utilization rate and waste of two machine tools in the prior art.

[0005] To achieve the above object, the present invention proposes the following technical solutions: A multi-turret machining machine tool comprises a bed base, a workpiece spindle device and three machining devices; The workpiece spindle device includes a workpiece spindle, a belt, a motor and a processing fixture, wherein the motor is connected to the workpiece spindle via a belt, the processing fixture is arranged on the workpiece spindle, and the workpiece spindle is arranged on the bed base; The processing device includes a driving mechanism and a processing mechanism, specifically: The driving structure includes a column, a horizontal guide rail, a vertical guide rail and a ram; one side of the column on both sides of the centripetal side is a vertical vertical surface, which is installed with a vertical guide rail; the horizontal guide rail is arranged on the workpiece spindle device, and the ram is placed on the vertical guide rail; The processing mechanism includes a turret, a cutter disc and a cutting tool. The turret is located on a ram, the cutter disc is arranged vertically, and the cutting tool is fixed along the circumference of the cutter disc.

[0006] Preferably, the horizontal guide rails of the three processing devices together form a concentric triangle structure, which is concentric with the workpiece spindle.

[0007] Preferably, the centripetal angles of the concentric triangle structure are set to three angles A, B, and C, respectively, A+B+C=360°, B=C, and A>B, A>C.

[0008] Preferably, the centripetal side centers of the columns of the three processing devices are coaxially distributed with the workpiece spindle; the vertical guide rail centers of the three processing devices are coaxially distributed with the workpiece spindle device.

[0009] A turning process, based on the multi-turret machining machine tool, comprises the following steps: Select processing categories according to needs, including conventional processing categories, lightweight processing categories and comprehensive processing categories; Assume that there are three processing devices, namely a first processing device, a second processing device and a third processing device. The processing tasks of the three processing devices are determined according to the processing categories. The processing devices set tools according to the processing tasks to complete the processing.

[0010] Preferably, when the conventional processing category is selected, the structural arrangement of the workpiece includes an outer wall, an inner wall, a burr area, a ring groove area, a boring area, and a flange area; The first processing device performs inner wall rough processing and inner wall fine processing, and is provided with corresponding tools; The second processing device performs rough processing and fine processing of the boring area and is provided with corresponding tools; The third processing device performs outer wall rough processing, outer wall fine processing, burr area processing and ring groove area processing, and is provided with corresponding tools.

[0011] Preferably, when the lightweight processing category is selected, the structure of the workpiece includes an outer wall, an inner wall, a burr area, a ring groove area, a boring area, a flange area and a buckle groove area; The first processing device performs inner wall rough processing, inner wall fine processing and burr area processing, and is provided with corresponding tools; The second processing device performs ring groove area processing, buckle groove area processing and boring area finishing processing, and is provided with corresponding tools; The third processing device performs outer wall rough processing, outer wall fine processing and boring area rough processing, and is provided with corresponding tools.

[0012] Preferably, when the comprehensive processing category is selected, the structure of the workpiece includes an outer wall, an inner wall, a burr area, a ring groove area, a boring area, a flange area, a buckle groove area and a noise reduction area, and the noise reduction area includes an upper buckle groove area and a lower buckle groove area; The first processing device performs inner wall finishing, burr area processing and upper buckle groove processing, and is provided with corresponding tools; The second processing device performs ring groove area processing, buckle groove area processing, boring area finishing processing and lower buckle groove area processing, and is provided with corresponding tools; The third processing device performs rough processing of the boring area, rough processing of the inner wall, rough processing of the outer wall and fine processing of the outer wall, and is provided with corresponding tools.

[0013] The present invention is beneficial in that: The present invention uses the concept of parallel processing and rationally arranges the machine tool structure to achieve simultaneous processing of three tools. It optimizes the processing technology that can simultaneously process three tools according to the fixed processing time of different parts of the workpiece, and optimizes the processing technology arrangement according to the different processing categories of the workpiece, thereby achieving a breakthrough efficiency improvement in the bottleneck process of wheel processing, thereby matching the processing efficiency of the other two machine tools, achieving optimal matching of unit beats, improving the utilization rate of the other two machine tools, and increasing unit output. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings: Figure 1 This is a schematic diagram of the main view of a multi-turret machining machine tool; Figure 2 It is a top view schematic diagram of a multi-turret machining machine tool; Figure 3 This is a schematic diagram of the bed base; Figure 4 A schematic diagram of conventional machining categories used in a turning method; Figure 5 A schematic diagram of lightweight machining categories used in a turning method; Figure 6 Schematic diagram of comprehensive processing categories used in a turning method. DETAILED DESCRIPTION

[0015] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.

[0016] The following detailed description is an exemplary description and is intended to provide further detailed description of the present invention. Unless otherwise indicated, all technical terms used in the present invention have the same meaning as those generally understood by those skilled in the art to which the present invention belongs. The terms used in the present invention are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention.

[0017] See also Figure 1 、 2 As shown in , 3, the present invention provides a multi-turret machining center, which specifically includes a bed, a workpiece spindle device and three machining devices.

[0018] The bed includes a bed base 100 and feet 101 , and the feet 101 are arranged on the bed base 100 .

[0019] A chip conveyor 103 is provided on the bed base 100 . The internal inclined surface of the bed base 100 is distributed, which is conducive to the processing chips sliding down the inclined surface, being washed to the chip conveyor crawler 102 by the cutting fluid, and being discharged backward by the chip conveyor crawler 102 .

[0020] Due to the simultaneous processing of multiple turrets, the chip conveyor 103 adopts a dual-track rear chip removal structure, with the dual tracks distributed on both sides of the workpiece spindle. A water tank is set below the chip conveyor 103. During the process of conveying the processed aluminum chips on the tracks, the cutting fluid flows back into the water tank and is circulated by the water pump inside the water tank.

[0021] The workpiece spindle device is composed of a workpiece spindle 1100 , a belt 105 , a motor 104 and a corresponding processing fixture 900 . The motor 104 is connected to the workpiece spindle 1100 via the belt 105 , and the processing fixture 900 is arranged on the workpiece spindle 1100 .

[0022] The workpiece spindle 1100 is arranged at the front position of the bed base 100, and the axis of the workpiece spindle 1100 is perpendicular to and concentric with the horizontal guide rails of the three processing devices.

[0023] The processing device includes a drive mechanism and a processing mechanism. The drive mechanism includes a column 200, a horizontal guide rail 300, a vertical guide rail 400, and a ram 500. The horizontal guide rail 300 is angularly distributed along the circumference of the workpiece spindle device in a horizontal plane to form a concentric triangle structure. The centripetal direction forms the X coordinate axis used for processing. The centripetal angles are set to three angles A, B, and C respectively. The angle between X1 and X2 is used for loading and unloading angles. The angle B between X1 and X3 and the angle C between X2 and X3 are set to the same size. A+B+C=360 degrees, B=C, and A>B, A>C.

[0024] The center of the horizontal guide rail 300 is coaxially distributed with the workpiece spindle device, ensuring that the horizontal guide rail moves inwardly and outwardly along the center direction of the workpiece.

[0025] The columns 200 in the driving mechanism are assembled with the bed along the corresponding horizontal guide rails. One side of the column 200 is a vertical surface for installing the vertical guide rail, and the other side is a platform inclined surface. The column width is set according to the selected guide rail width.

[0026] The center of the centripetal side of the column 200 is concentrically distributed with the workpiece spindle device to ensure that the column passes through the center of the workpiece spindle in the forward and backward movement direction along the horizontal guide rail. The vertical guide rail 400 is placed on the vertical centripetal surface of a single independent column of a single processing device, and the center of the guide rail is concentrically distributed with the workpiece spindle device to ensure that when the processing device located on the column 200 moves vertically up and down, the center of the processing device passes through the center of the workpiece device, forming the Z-axis used for processing in the vertical direction, which corresponds to Z1, Z2 and Z3 of the horizontal guide rails.

[0027] The ram 500 is placed on the vertical guide rail, and the center of the ram is concentric with the center of the vertical guide rail and the workpiece spindle device.

[0028] The three processing devices are distributed at an angle, and each processing device can complete the corresponding cutting work without distinction. When processing different processing positions of the workpiece, the optimal processing technology can be matched according to the actual processing time to achieve the maximum parallel processing of the three tools, thereby achieving the shortest overall workpiece processing time and the highest processing efficiency.

[0029] The processing mechanism is composed of a turret 600 , a cutter head 700 and corresponding cutting tools. The turret 600 is located on the corresponding ram 500 , and the center of the turret 600 is concentrically distributed with the center of the ram 500 .

[0030] The cutter disc 700 is arranged vertically, and the center of the cutter disc 700 is parallel to the axis of the workpiece spindle device, and both are vertically distributed.

[0031] The tools are mounted in a circular pattern around the cutterhead 700, arranged at equal angles via toolholders. The corresponding turning tool is automatically switched according to the programmed machining program. The tool structures vary depending on the workpiece cutting area, including external turning tools, internal boring tools, and facing tools. The tools can be selected as either right-handed or left-handed, with right-handed tools being preferred, depending on the actual machining path.

[0032] The processing devices are respectively configured as a first processing device, a second processing device and a third processing device.

[0033] The present invention also provides a turning method, which optimizes the processing technology arrangement of workpieces with different structures according to the multi-turret processing machine tool. According to the existing processing parts, the turning technology can be optimized into three categories, including conventional processing category, lightweight processing category and comprehensive processing category. Specifically: Example

[0034] like Figure 4 As shown, the conventional processing category is specifically described as the workpiece being arranged into a wheel structure according to conventional requirements, including an outer wall 1, an inner wall 2, a burr area 3, an annular groove area 4, a boring area 5, and a flange area 6.

[0035] 10 in the figure is the knife receiving position.

[0036] The conventional category processing requires a total of seven tools, and the specific processing technology is divided into two tools for outer wall 1 roughing and finishing; two tools for inner wall 2 roughing and finishing; one tool for burr area 3 roughing and finishing; the ring groove area 4 and the burr area share a tool for forming in one step; the rough processing of boring area 5 and the rough processing of flange area 6 both share the rough processing tool with the inner wall, and the finishing of boring area 5 and the finishing of flange area 6 share the finishing tool of fine turning.

[0037] According to the single-side blank allowance of the workpiece and the processing path and processing parameter settings of different parts, the processing time of different parts is different. According to the existing conventional double-turret lathe processing technology, the arrangement is as follows: the turret 600 of the first processing device processes the outer wall 1 rough processing and fine processing and the inner wall 2 rough processing and fine processing; the turret 600 of the second processing device processes the flange area 6 rough processing and fine processing, the boring area 5 rough processing and fine processing and the burr area 3 processing.

[0038] According to the tool arrangement, the turret 600 of the first processing device has a total of four tools, and the cutting position to the origin (or the origin to the cutting position) is moved a total of seven times (the last time is to return to the origin). The turret 600 of the second processing device has a total of three tools, and the cutting position to the origin (or the origin to the cutting position) is moved a total of five times (the last time is to return to the origin).

[0039] The workpiece processing time depends on the longest turret processing time. If the processing time is t, then the first turret processing time is t1. 粗 +t1 精 +t2 粗 +t2 精 , the total processing time is T1=t1 粗 +t1 精 +t2 粗 +t2 精 +t 换刀 *7.

[0040] The second turret processing time is t5 粗 +t5 精 +t6 粗 +t6 精 +t4+t3, the total processing time is T2=t5 粗 +t5 精 +t6 粗 +t6 精 +t4+t3+t 换刀 *5.

[0041] When a three-turret machine tool is used for processing, the processing parts of the same workpiece structure can be allocated to the three turrets according to different processing times. It can not only realize three-tool parallel processing, but also reduce the arrangement of tools on the same turret and reduce the tool change time for cutting.

[0042] According to the above conventional category description, the preferred arrangement process when using a three-turret machine tool for processing is that the first turret processes the inner wall roughing and inner wall fineness, the second turret processes the boring roughing and boring fineness, and the third turret processes the outer wall roughing, outer wall fineness, burr area, and ring groove area.

[0043] According to the above description, the total processing time of the first turret is T1 / =t1 粗 +t1 精 +t 换刀 *3; The total processing time of the second turret is T2 / =t5 粗 +t5 精 +t 换刀 *3; The total processing time of the third turret is T3 / =t1 粗 +t1 精 +t4+t3+t 换刀 *5.

[0044] The workpiece processing time depends on the longest turret processing time. According to the above comparison, it is obvious that the processing time of the three-turret machine tool is T / ={Max(T1 / , T2 / , T3 / )}<Double turret machine tool processing time T={Max(T1, T2)}. Example

[0045] like Figure 5 As shown, the lightweight processing category is specifically described as a lightweight structure setting at special parts of the workpiece under the premise of the conventional category, including the outer wall 1, the inner wall 2, the burr area 3, the ring groove area 4, the boring area 5, the flange area 6 and the buckle groove area 7.

[0046] 10 in the figure is the knife receiving position.

[0047] The lightweight category processing requires a total of eight tools, and the specific processing technology is divided into two tools for roughing and finishing the outer wall 1; two tools for roughing and finishing the inner wall 2; one tool for roughing and finishing the burr area 3; the ring groove area 4 and the burr area 3 share a tool for forming in one go; the roughing of the boring area 5 and the roughing of the flange area 6 both share the roughing tool with the inner wall 2, the finishing of the boring area 5 and the finishing of the flange area 6 share the fine turning tool, and the buckle groove area 7 is processed multiple times by a special buckle groove tool.

[0048] The lightweight processing category is arranged according to the existing conventional machine tool processing technology. The processing content of the turret 600 of the first processing device is outer wall 1 rough processing, outer wall 1 fine processing, inner wall 2 rough processing, and inner wall 2 fine processing. The turret 600 of the first processing device is arranged with four tools in total; the processing content of the turret 600 of the second processing device is ring groove area 4 processing, burr area 3 processing, buckle groove area 7 processing, flange area 6 rough processing, boring area 5 rough processing, flange area 6 fine processing, boring area 5 fine processing. The turret 600 of the second processing device is arranged with four tools in total.

[0049] The total processing time of the first turret is T1=t1 粗 +t1 精 +t2 粗 +t2 精 +t 换刀 *7; The total processing time of the second turret is T2=t5 粗 +t5 精 +t6 粗 +t6 精 +t4+t3+t7+t 换刀 *7.

[0050] According to the above lightweight category description, the preferred arrangement process when using a three-turret machine tool for processing is: the processing content of the turret 600 of the first processing device is inner wall 2 rough processing, inner wall 2 fine processing, and burr area 3 processing, a total of three tools; the processing content of the second turret is ring groove area 4 processing, buckle groove area 7 processing, and boring area 5 fine processing, a total of three tools; the processing content of the third turret is outer wall 1 rough processing, outer wall 1 fine processing, and boring area 5 rough processing, a total of three tools.

[0051] According to the above description, the total processing time of the first turret is T1 / =t2 粗 +t2 精 +t3+t 换刀 *5; Total processing time of the second turret T2 / =t4+t7+t5 精 +t 换刀 *5; Total processing time of the third turret T3 / =t1 粗 +t1 精 +t5 粗 +t 换刀 *5.

[0052] The workpiece processing time depends on the longest turret processing time. According to the above comparison, it is obvious that the three-turret processing time T / ={Max(T1 / , T2 / , T3 / )}<Dual turret processing time T={Max(T1, T2)}. Example

[0053] like Figure 6 As shown, the comprehensive processing category is specifically described as adding a noise reduction processing area to the workpiece on the basis of the lightweight processing category, including outer wall 1, inner wall 2, burr area 3, ring groove area 4, boring area 5, flange area 6, buckle groove area 7, and noise reduction area 8.

[0054] 10 in the figure is the knife receiving position.

[0055] The specific processing technology is divided into two tools for roughing and finishing the outer wall 1; two tools for roughing and finishing the inner wall 2; one tool for roughing and finishing the burr area 3; the ring groove area 4 and the burr area share a tool for forming in one step; the rough processing of the boring area 5 and the rough processing of the flange area 6 both share the rough processing tool with the inner wall 2, the finishing of the boring area 5 and the finishing of the flange area 6 share the fine turning tool, the buckle groove area 7 is processed multiple times by a special buckle groove tool, the noise reduction area 8 includes the upper buckle groove area and the lower buckle groove area, corresponding to the upper buckle groove tool and the lower buckle groove tool respectively, so the comprehensive category processing requires a total of ten tools.

[0056] The comprehensive processing category is arranged according to the existing conventional machine tool processing technology. The processing content of the turret 600 of the first processing device is outer wall 1 rough processing, outer wall 1 fine processing, inner wall 2 rough processing, inner wall 2 fine processing, flange area 6 rough processing, boring area 5 rough processing, upper buckle groove area processing, with a total of five tools arranged; the processing content of the turret 600 of the second processing device is ring groove area 4 processing, burr area 3 processing, buckle groove area 7 processing, flange area 6 fine processing, boring area 5 fine processing, lower buckle groove area processing, with a total of four tools arranged.

[0057] The processing time of the turret 600 of the first processing device is T1=t1 粗 +t1 精 +t2 粗 +t2 精 +t6 粗 +t5 粗 +t8 上 +t 换刀 *9; The processing time of the turret 600 of the second processing device is T2=t4+t3+t7+t6 精 +t5 精 +t8 下 +t 换刀 *7.

[0058] According to the comprehensive processing category, the preferred arrangement process when using a three-turret machine tool for processing is: the processing content of the turret 600 of the first processing device is: fine processing of the inner wall 2, processing of the burr area 3, and processing of the upper buckle groove, a total of three tools; the processing content of the turret 600 of the second processing device is: processing of the ring groove area 4, processing of the buckle groove area 7, fine processing of the boring area 5, and processing of the lower buckle groove area, a total of four tools; the processing content of the turret 600 of the third processing device is: rough processing of the boring area 5, rough processing of the inner wall 2, rough processing of the outer wall 1, and fine processing of the outer wall 1, a total of three tools.

[0059] According to the above description, the total processing time T1 of the turret 600 of the first processing device is / =t2 精 +t2+t8 上 +t 换刀 *5; Total machining time of turret 600 of the second machining device T2 / =t4+t7+t5 精 +t8 下 +t 换刀 *7; Total machining time of turret 600 of the third machining device T3 / =t5 粗 +t2 粗 +t1 粗 +t1 精 +t 换刀 *5.

[0060] The workpiece processing time depends on the longest turret processing time. According to the above comparison, it is obvious that the three-turret processing time T / ={Max(T1 / , T2 / , T3 / )}<Dual turret processing time T={Max(T1, T2)}.

[0061] The present invention adopts the concept of parallel processing and rationally arranges the structure of the original double-turret machining center to realize the simultaneous processing function of three tools. The optimized processing technology that can process three tools simultaneously is performed according to the fixed processing time of different parts of the workpiece, and the optimized processing technology is arranged according to the different processing categories of the workpiece, thereby achieving a breakthrough efficiency improvement in the bottleneck process of wheel processing, thereby matching the processing efficiency of the other two machine tools, achieving optimal matching of unit beats, improving the utilization rate of the other two machine tools, and improving unit output.

[0062] The present invention provides a multi-turret machining machine and a turning method, specifically a three-turret machine tool that is different from the existing dual-turret structure, and an efficient machining process arrangement based on different wheel structures under the three-turret machine tool. The machine tool rationally arranges the relative positions of the three turrets 600 and rationally arranges different tools on different turrets 600, so that the three tools do not interfere with each other during the machining of wheel structures of different sizes, and the three tools do not interfere with the workpiece during the machining of different parts. The machine tool can simultaneously process different parts of the wheel with three tools during the machining process, thereby shortening its machining time, thereby matching the machining efficiency of the other two machine tools, achieving optimal matching of the unit beats, improving the utilization rate of the other two machine tools, and improving the unit output.

[0063] It is understood from common technical knowledge that the present invention may be implemented by other embodiments that do not depart from its spirit or essential features. Therefore, the embodiments disclosed above are, in all respects, merely illustrative and not exclusive. All modifications within the scope of the present invention or equivalent to the scope of the present invention are intended to be encompassed by the present invention.

[0064] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0065] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0066] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0067] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Claims

1. A multi-turret machining machine tool, characterized in that: It includes a bed base, a workpiece spindle device and three processing devices; The workpiece spindle device includes a workpiece spindle, a belt, a motor and a processing fixture, wherein the motor is connected to the workpiece spindle via a belt, the processing fixture is arranged on the workpiece spindle, and the workpiece spindle is arranged on the bed base; The processing device includes a driving mechanism and a processing mechanism, specifically: The driving structure includes a column, a horizontal guide rail, a vertical guide rail and a ram; one side of the column on both sides of the centripetal side is a vertical vertical surface, which is installed with a vertical guide rail; the horizontal guide rail is arranged on the workpiece spindle device, and the ram is placed on the vertical guide rail; The processing mechanism includes a turret, a cutter disc and a cutting tool. The turret is located on a ram, the cutter disc is arranged vertically, and the cutting tool is fixed along the circumference of the cutter disc.

2. A multi-turret machining center according to claim 1, characterized in that: The horizontal guide rails of the three processing devices together form a concentric triangle structure, which is concentric with the workpiece spindle.

3. A multi-turret machining machine tool according to claim 2, characterized in that: The centripetal angles of the concentric triangle structure are set to three angles A, B, and C respectively, A+B+C=360°, B=C, and A>B, A>C.

4. The multi-turret machining center according to claim 1, wherein: The centripetal side centers of the columns of the three processing devices are coaxially distributed with the workpiece spindle; the vertical guide rail centers of the three processing devices are coaxially distributed with the workpiece spindle device.

5. A turning process, characterized in that: A multi-turret machining tool according to any one of claims 1 to 4, comprising the following steps: Select processing categories according to needs, including conventional processing categories, lightweight processing categories and comprehensive processing categories; Assume that there are three processing devices, namely a first processing device, a second processing device and a third processing device. The processing tasks of the three processing devices are determined according to the processing categories. The processing devices set tools according to the processing tasks to complete the processing.

6. A turning process according to claim 5, characterized in that: When selecting the conventional processing category, the structural layout of the workpiece includes the outer wall, inner wall, burr area, ring groove area, boring area and flange area; The first processing device performs inner wall rough processing and inner wall fine processing, and is provided with corresponding tools; The second processing device performs rough processing and fine processing of the boring area and is provided with corresponding tools; The third processing device performs outer wall rough processing, outer wall fine processing, burr area processing and ring groove area processing, and is provided with corresponding tools.

7. A turning process according to claim 5, characterized in that: When selecting the lightweight processing category, the workpiece structure includes the outer wall, inner wall, burr area, ring groove area, boring area, flange area and buckle groove area; The first processing device performs inner wall rough processing, inner wall fine processing and burr area processing, and is provided with corresponding tools; The second processing device performs ring groove area processing, buckle groove area processing and boring area finishing processing, and is provided with corresponding tools; The third processing device performs outer wall rough processing, outer wall fine processing and boring area rough processing, and is provided with corresponding tools.

8. A turning process according to claim 5, characterized in that: When the comprehensive processing category is selected, the structure of the workpiece includes the outer wall, inner wall, burr area, ring groove area, boring area, flange area, buckle groove area and noise reduction area, and the noise reduction area includes the upper buckle groove area and the lower buckle groove area; The first processing device performs inner wall finishing, burr area processing and upper buckle groove processing, and is provided with corresponding tools; The second processing device performs ring groove area processing, buckle groove area processing, boring area finishing processing and lower buckle groove area processing, and is provided with corresponding tools; The third processing device performs rough processing of the boring area, rough processing of the inner wall, rough processing of the outer wall and fine processing of the outer wall, and is provided with corresponding tools.

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