As the core of CNC machine tools, the servo system ensures the normal operation of the machine tool. Once a fault occurs, the impact range and consequences are extremely large. The article introduces the composition and classification of servo systems in CNC machine tools, as well as the types of servo system faults. It elaborates on the basic maintenance process and common maintenance methods for common faults in CNC machine tool servo systems, and finally summarizes the common fault handling measures for CNC machine tool servo systems.


The core of the work of CNC machine tools is the servo system. The servo system of CNC machine tools is the hub between the mechanical transmission components of the machine tool and the CNC system. The servo system is in frequent starting, braking and other action processes during the dynamic operation of the machine tool, and has the highest failure rate. Therefore, the stability and reliability of the servo system directly affect the quality and efficiency of part processing. How to solve the technical difficulties in the maintenance of CNC machine tools is a major issue facing the field of CNC machine tool maintenance.


1. CNC machine tool servo system
The servo system of a CNC machine tool consists of a drive unit, actuators, mechanical transmission components, and detection feedback links. The types of servo systems for CNC machine tools can be divided into open-loop CNC systems and closed-loop CNC systems based on whether the feed servo subsystem of the CNC system has a position measurement device; According to the classification of using DC servo motors and AC servo motors, they can be divided into DC servo systems and AC servo systems; According to the classification of feed drive and spindle drive, it can be divided into feed servo and spindle servo systems; According to feedback comparison control methods, there are pulse digital comparison servo systems, phase comparison servo systems, amplitude comparison servo systems, and fully digital servo systems. The servo system converts and amplifies the displacement and other signals received, and then drives the corresponding machine spindle and tool holder to work through the mechanical transmission system, thereby completing the corresponding precision actions.


2. Types of faults in servo systems of CNC machine tools
The faults of servo systems are generally divided into feed servo system faults and spindle servo system faults. 2.1 Feed servo system fault (1) Overtravel: When the motion stroke exceeds the soft limit or switch limit setting range, an overtravel alarm will occur. (2) Motor not rotating: Loss of enable control signal or absence of speed control signal can cause the servo motor to not rotate. (3) Bounce: Unstable signals, poor contact of wiring terminals, unstable or interfered speed control signals can all cause bouncing phenomena. (4) Overload: Frequent forward and reverse rotation, poor lubrication, and excessive load can all cause overload alarms. (5) Machine tool vibration: The high-speed movement of the machine tool causes vibration, and the vibration problem originates from the speed issue. The speed loop can be queried. (6) Crawling: Excessive external load, low gain of servo system, poor lubrication of transmission chain, loose coupling connection, and defects in the coupling itself can all cause crawling phenomenon. 2.2 Spindle servo system failure (1) Overload: frequent forward and reverse rotation, input power phase loss, excessive cutting amount, etc. (2) Interference: Poor shielding and grounding, external electromagnetic interference, interference with feedback signals or spindle speed command signals. (3) Motion mismatch: inaccurate encoder pulse feedback signal, etc. (4) Abnormal speed: The spindle speed exceeds the specified range value. (5) Abnormal noise: The spindle vibrates and produces abnormal sounds during operation. (6) Quasi stop shaking: When changing or retracting the tool, the spindle positioning shakes. (7) The spindle does not rotate: The spindle motor does not rotate during operation.


3. Basic maintenance process for common faults in servo systems of CNC machine tools
When repairing the servo system of a CNC machine tool, the basic idea is the same as that of machine tool maintenance, which basically adopts the "look, smell, ask, cut, apply" maintenance process steps. "Look, smell, ask" is to understand the fault phenomenon, "cut" is to analyze the cause of the fault, find the faulty component, and "apply" is to solve the actual fault problem. The specific implementation process is as follows: (1) When a fault occurs, people first habitually use the naked eye to conduct a preliminary inspection, determine the operation status and alarm information of the machine tool they see. (2) Wen: When electrical components are overloaded, they may burn out. Sensing the problem through smell is also one of the ways to diagnose faults. (3) Q: When maintenance personnel arrive at the scene and cannot identify the fault based on what they see or smell, it is necessary for maintenance technicians to ask the on-site operators about basic machine tool issues, including abnormal machine tool sounds or abnormal operating conditions heard. (4) Cut: After conducting preliminary diagnosis in the previous steps, in order to further understand the fault problem, maintenance technicians can operate relevant testing instruments and meters, deeply diagnose the cause of the fault, and ultimately determine the location of the fault. (5) Shi: After the fault problem is identified, prepare a maintenance plan, prepare data materials, prepare corresponding maintenance tools, adopt corresponding matching maintenance methods to handle the fault, and finally conduct functional testing to solve the fault problem.


4. Common maintenance methods for common faults in servo systems
(1) Component replacement method. The component replacement method, also known as the module exchange method, can be used for fault prediction due to the modular design of servo system components and the interchangeability between modules. (2) Short circuit method for power lines. When a component in the system circuit burns out, it may cause a short circuit. A multimeter can be used to detect the input and output terminals of the component, check for a short circuit, and thus identify the cause of the fault. (3) Enabling condition method. The servo motor needs to meet the enabling conditions in order to work, and the cause of the fault can be determined and eliminated by changing the enabling conditions for inspection. (4) Reference voltage method. When a certain axis malfunctions, in order to determine whether the drive module or motor module is faulty, the speed ring can be disconnected and the position ring can be checked. (5) Parameter testing method. When a CNC machine tool experiences a crawling fault, it may be due to the servo system gain being too low, and the problem needs to be verified by changing the parameters. (6) Measurement method. When no physical structural problems are found in the components of the system after inspection, it is possible to choose to check their voltage and current values to determine whether the fault is caused by insufficient voltage and current.


5. Common troubleshooting of servo systems in CNC machine tools
5.1 Fault handling of feed servo system
(1) TMP indicator light red: Check if the driver is overheated and if the motor is overloaded. (2) DIS indicator light yellow: Check if the driver enable signal (+ENA/- ENA) is connected correctly. (3) The LED indicator light is green and the motor is not moving: check if the+INHIBIT and - INHIBIT ports are connected incorrectly, and if the command signal ground is connected to the driver signal ground. (4) Motor rotation, LED flashing: Check if the motor phase setting switch is correct and if the sensor voltage value is within the range. (5) Driver LED light not on: Check if the power supply voltage is less than the minimum voltage value. (6) The LED light remains red: check whether the input voltage of the driver is overvoltage or undervoltage, whether the motor is short circuited between phases, and whether the motor is overloaded and overheating. (7) Unstable positioning accuracy of the transmission system: Check if the screw nut is installed correctly. (8) The positioning error of the transmission system is relatively large: check whether the pitch error of the screw is too large, and whether the connection between the motor and the screw is loose. (9) Motor stall: Check if the speed feedback polarity is reversed and if the encoder power supply has lost power. (10) Excessive positioning error of reference point: Check whether the proximity switch is installed correctly, whether the gap between the proximity switch and the detection object is sufficient, and whether the proximity switch is faulty. (11) Thread machining cannot be repeated: Check if the mechanical connection between the spindle and spindle encoder is normal. (12) Deviation counter overflow error occurs when the motor rotates at high speed: check whether the motor and cables are damaged, whether the wiring of the power cable and encoder cable is correct, whether the deviation counter overflow of the motor is incorrect, whether the gain setting is correct, and whether the motor load is within the allowable range. (13) Incorrect return reference point action: Check if the logic proximity switch needs to be replaced and if the contact switch has been reset. (14) The motor runs faster in one direction than in another: check if the brushless motor phase is incorrect, if the test/deviation switch is in the test position, and if the deviation potentiometer position is correct. (15) The servo motor does not operate when there is pulse output: check whether the control mode is in position control mode, whether the encoder cable is configured incorrectly, whether the brake of the servo motor with brake has been opened, whether the Run command is normal, monitor the controller panel to confirm whether the pulse command is input, monitor whether the controller pulse is output normally, whether the input pulse is consistent with the command pulse setting, and whether the deviation counter reset signal is input.
5.2 Fault Handling of Spindle Servo System
(1) The spindle does not move and there are no alarms: check whether the mechanical load is too large, whether the connection between the spindle and the motor is too loose, whether the tool or workpiece is clamped properly, whether the power line is connected normally, whether the enable signal is normal, and whether the driver or motor is damaged. (2) Invalid spindle speed command: Check if the power connection is normal and if the CNC circuit board is damaged; Check whether the feedback signal is normal, whether the feedback line connection is normal, and whether the spindle driver parameters are set improperly. (3) Excessive speed deviation: Check whether the feedback connection is normal, whether the feedback device is damaged, whether the power line connection is normal, whether the power voltage is normal, whether the cutting load of the machine tool is too large, whether the brake circuit is normal, and whether the motor and driver are damaged. (4) Excessive spindle vibration or noise: Check if the power system is out of phase or has abnormal voltage, if the load is too heavy or poorly lubricated, if the drive belt is too tight, if the bearings and gears are damaged, if the machine clearance is normal, and if the pre tightening screws are loose. (5) The spindle does not work properly during acceleration/deceleration: check if the relevant parameter settings are normal, if the feedback device is functioning properly, and if the inertia between the motor and the load matches. (6) Random fluctuations in spindle speed: Check if the shielding and grounding are normal, and if the spindle speed command signal and feedback signal are disturbed. (7) The spindle cannot be variable speed: check if the CNC parameter settings are improper, if the machining program programming is incorrect, and if there are any faults in the D-A conversion circuit and speed analog input circuit. (8) Irregular threads: Check if the encoder is functioning properly, if the coupling is loose or broken, if the spindle speed is unstable, and if there are any issues with the machining program. (9) Unstable spindle positioning point: Check if the limit switch is damaged, if the feedback line connection is poor, and if the encoder is functioning properly. (10) Insufficient spindle output: Check the clearance of the drive belt and whether the spindle motor is faulty. (11) The spindle cannot work properly: Check if the elastic knife is in place, if the spindle gear is in position, if the cutting is overloaded, if the driver is overheated, if the spindle motor module is faulty, and if the mechanical parts of the host are damaged.
6. Conclusion
Numerical control machine tools are the guarantee for the development of the national manufacturing industry. Solving the problem of machine tool maintenance can greatly promote the economic development of the country. This article briefly introduces the types of faults and maintenance methods of the servo system of numerical control machine tools, and focuses on the common fault maintenance measures of the servo system of numerical control machine tools, providing some reference for the fault maintenance of numerical control machine tools.

现代社会发展中，制造业有着极其重要的地位。要想促进制造业的发展，就需要应用先进技术，比如数控机床。而机械零部件中，螺纹是非常重要的连接形式，所以需要充分重视螺纹加工精度，以保证连接部位的精密度达标，也能够促进整体的加工质量提升，满足不同使用工况的要求。因此，数控机床在进行机械螺纹类零件加工时，应该给予足够的重视，做好技术的总结和分析，以提升综合技术水平，满足现代社会的应用需要。

1、数控机床加工技术

在现代制造业领域内，数控机床加工已经成为非常普遍的方式，对于机械加工精度的提升有着重要的影响。数控机床从字面意思理解，就是数字化控制的机床设备，通过内部设定的计算机系统来进行设备的运行控制，这是一种智能化的设备，对于提高加工水平有着重要的帮助，可以根据所设定的编码按照规定逻辑来运行，从而不会出现任何偏差或问题。由于数控机床精密度很高，所以内部组成也是比较复杂的，对于操作人员要求亦比较高。同时，数控机床加工技术的出现，使得很多精密部件的质量得到了提升，极大地满足了不同使用条件的要求。在零部件加工制造中，通过数控机床加工技术的合理应用，以提高工艺、技术水平，促进尺寸精度的提高。当前的机械加工生产环节，人们比较关注的就是机械螺纹类零部件，螺纹是机械连接的重要方式。随着时代的发展，当前的螺纹类零部件的种类也在大幅的增多，不同连接条件下所使用的螺纹形式也是不同的，比如外螺纹、内螺纹、单线螺纹等，也可以按照要求来调整螺距。在数控机床操作中，与传统机床螺纹加工方式相比，最具优势的是对刀环节，这是影响最终加工精度的关键性环节。此外，在机械加工环节中，车削是重要的方式，尤其是回转类型的零部件，加工效率比较高。在该加工方式实施环节，通过旋转运动和刀具在直线上的移动来完成整个加工环节。这是最为基本的功能，应用也是最为普遍的。

2、螺纹类零件在数控生产加工技术中的具体处理方式

在对机械螺纹类零件进行工艺加工处理中，主要是进行坐标尺寸的各种数据的确定和标志，并且在整个零件各种点、线、面的尺寸和具体位置的确定过程中，都应该以这个坐标为基础，以坐标原点为出发点。因为数控加工技术以精确度较高而闻名，因此整个数控加工生产过程中不会出现较大的数据误差，从而可以通过计算控制实现局部数据的修改和尺寸的改变。并且在具体的数控加工过程中，对其刀具的路线也应该选择尽量简单的路线进行加工生产，按照经验，可以使刀具按照0b或者90b的方向进行来回切割。另外，因为机械螺纹类零件在整个加工生产过程中，并不存在着轮廓上的误差，所以在数控加工过程中，应该保证零件所具有的直线型轮廓平行于设计之初所选择的坐标轴，这样能够提高整个螺纹类零件生产加工的精确度。另外，在整个数控加工过程中，螺纹类零件中拐点的加工处理也不应该选择直角过渡的方式，并且对刀具运行路线中材料数量的去除，也必须选择均匀的方式来减小冲击，从而提高整个零件的精确度。

3、机械类螺纹零件的数控机床加工技术分析

在进行机械螺纹类零件加工中，主要是通过数控车床来实现的，车削加工环节应该结合实际情况选择最佳的加工方式，从而可以提升螺纹部件的精确度。在具体的加工作业环节，首先就是要对设计图纸进行分析和了解，然后实现数字化处理，最为重要的工作就是选择合适的零部件原材料，然后按照图纸完成各个加工过程。机械类螺纹零件在加工的数据处理环节，首先应该结合设计图纸的要求计算出刀具的各个角度，然后明确在切削环节中的退刀量参数。在数控加工环节，要进行整体性的零件形状的勾画和分析，连续不断地完成整个车削加工作业环节，然后就能够进行整个零部件的加工和控制。为了能够使得加工环节中的刀具达到稳定性的标准，应该选择最佳的刀具完成加工作业，同时还要明确具体的加工工艺路线和方式，确定合理的加工次数，从而可以使得螺纹加工顺利进行，提高尺寸精度。此外，在精加工环节，应该确保加工次数、力度是均匀不变的，还要选择质量水平高的刀具，以提高加工质量水平。机械类零件的数控加工开始前，先根据设计图纸进行程序的编写，要利用主轴编码器来进行，然后是按照程序完成整个加工环节。在进行数据处理阶段，应该利用系统来检测确定主轴的各个信号，并且按照实际的运行方式进行加工制造，以达到规定的设计比例和标准，最终加工成为符合要求的螺纹零件。在生产中，要解决下面几个问题：首先应该围绕主轴进行旋转，然后使用刀架带动螺纹刀进行Z形移动，最终得到符合图纸尺寸要求的螺纹。其次，螺纹加工环节，要反复、多次地切削才能实现，为了避免出现精度不足的情况，应该确保每次切入的深度、位置都要符合标准要求。最后，对于多头螺纹部件的切削加工，应该按照精确分度方式来实现加工，以提升精确度。要想保证这几个方面都能够达到标准要求，需要按照机床设定的标准来实现增量性光电编码器的设定，然后实现机床驱动精确度的提升，促进加工精度的提高。在上述步骤设计完成之后，要开始整体加工作业。明确具体的加工工艺路线，确定走刀路线，尽量用图纸画出来，然后再进行数控程序的编写。该环节主要是在计算机中进行的，以确保各个数据不会出现计算错误的情况。通过这种方式可以避免出现错误的情况，也能够简化作业环节和步骤，提高加工的准确度，有效降低出错率，最终促进机械螺纹类零件加工质量的提升。

4、结语

数控机床进行机械螺纹类零件加工中，为了能够提高加工精度和效率，应该做好程序的设定，同时按照加工工艺逐步开展加工作业，还要保证各个加工工序都能够按照要求来进行，以提升最终的加工质量水平，使得各个工序质量合格，制造出符合要求的螺纹零件，满足不同条件的使用标准。

keyword：数控机床

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与其他类型的设备相比，数控机床设备的不同之处主要表现在其运行效率并非由自身的性能决定，而是由数控机床设备的维修与保养决定。由此可知，对数控机床设备进行维修与保养至关重要，能够有效降低数控机床设备电气故障发生率，确保机床设备的运行效率和运行稳定性。因此，相关工作人员需重视数控机床设备的应急处理工作，对电气故障，采取相应的应急处理措施与养护措施，从而有效提升设备的生产效率。

1、数控机床设备常见的电气故障

1.1数控机床设备的软硬件故障

具体来说，数控机床设备在运行过程中，软件与硬件出现故障较为常见。倘若数控机床设备硬件出现故障或损坏，相关人员需对整个数控机床设备进行修复。难以修复时，需要更换全新的设备，以确保数控机床设备能够正常、稳定运转。数控机床设备软硬件出现故障，主要是因为编程错误或是设置参数错误。因此，对数控机床设备软硬件故障进行检测的过程中，相关技术人员需要对具体程序的内容进行改变，并调整参数，确保科学操作，从而有效避免数控机床设备出现软硬件故障[1]。

1.2数控机床设备的系统故障与随机故障

数控机床设备在运转过程中一旦应用时间增加，易出现系统故障和随机故障。所谓系统故障，是指数控机床设备的设备系统较为老化，在其运转一段时间后产生系统故障。随机故障则是指数控机床设备在运行过程中偶然出现的故障[2]。系统故障和随机故障都较为复杂，因此对其进行检测与维修具有一定的难度。为保证检修工作的科学性，同时为有效避免系统故障问题和随机故障问题，需要相关人员加强对随机故障的排查工作，多增加排查的次数，并且需要反复调试系统结构，从而有效保证对故障的检测，充分发挥维修措施的效用。

1.3数控机床设备的一般性故障与突发性故障

根据数控机床设备在运转过程中故障问题发生的概率对常见故障进行划分，可分为一般性故障和突发性故障。所谓一般性故障，是指数控机床设备运行时间较长，周期一长易出现超过负荷运行生产等必然性故障。对一般性故障进行检测与维修，可依靠人的多感官系统进行观察、控制与预防。突发性故障则是指难以准确预测的故障，发生的原因通常是电气接触不良、部件损耗等。

2、数控机床设备电气故障诊断与处理

2.1诊断步骤

数控机床设备容易出现电气故障，主要是因为机加工车间空气存在诸多污染物，如灰尘、金属粉末等。这些污染物落到数控机床设备的数控系统中，尤其是落到印制线路板、电子器件上面，易导致元器件绝缘电阻下降、元器件与印制线路板损坏等，从而出现电气故障。对数控机床设备电气故障进行诊断，可通过以下诊断步骤来实施。相关维修人员在出现电气故障进行诊断前，需要询问相关人员具体的情况，主要包括故障发生的情况与表现以及故障产生的原因，便于对故障发生的部位及原因进行判断。对故障进行检查与分析，并且仔细观察工作寄存器和缓冲寄存器，了解数控机床设备在故障发生前已经执行的程序。另外，需检查印制电路板上的报警红灯。倘若报警红灯消失，则意味是软件出现故障；倘若报警红灯并未消失，则是硬件出现故障。数控机床设备电气故障出现的原因较多，在对电气故障进行诊断时，相关维修人员需结合配套的数控系统诊断手册与说明书，罗列并分析电气故障产生的原因。例如，CKA6150数控机床设备在运转过程中突然出现主轴急停故障与报警信息，主要原因是主轴电机绕组短路、电路板故障以及晶体管模块损坏。数控机床设备电气故障的诊断与维修，可罗列电气故障产生的原因，并且进行一一排除，以寻找到真正的原因。相关维修人员需做好准备工作，如采购零部件、准备工具仪表等，然后再对可能出现故障的原因进行逐一排查，以准确寻找到电气故障发生的具体原因。

2.2处理方法

2.2.1直接观察法对数控机床设备电气故障进行应急处理，可运用直接观察法，这是最常用的处理方法。所谓直接观察法，是指相关人员依靠肉眼感官，结合已有的经验，寻找电气故障发生的原因，并采取相应的处理方法。直接观察法操作较为简单，加上鲜少依赖工具，因而被广泛应用，成为当前数控机床设备电气故障最常用的应急处理方法。运用直接观察法对设备电气故障进行处理的过程中，相关技术人员需要询问其他操作人员有关电气故障发生的情况，特别是了解数控机床设备电气故障发生时的使用情况，之后用肉眼观察数控机床设备的外观情况，判断其是否出现裂缝或破损，还可通过鼻子闻设备是否存在异味，从而结合已有的经验，科学、合理地判断数控机床设备电气故障发生的部位与原因。2.2.2自我诊断功能法当前，绝大多数数控机床设备数控系统存在自我诊断功能，能够为相关维修人员的维修工作带来便利，提供相应的诊断信息，同时能全程有效地监测数控系统软件运行，从而为维修人员对设备电气故障进行诊断提供方便。运用自我诊断功能法进行检测，倘若出现异常情况，数控机床设备会出现报警信息或是二极管指示故障信息，需立刻切断电源，确保数控机床设备能够稳定运转。科学、合理地运用自我诊断功能法，能够呈现出系统与主机的数控系统部件，促进相关维系人员寻找到故障位置，即发生于数控系统部位还是机械部位。数控机床设备出现停机故障，通常是因为软件故障或者操作不当等。因此，出现系统故障后需要检查软件，从而有效保证维修的工作量。另外，数控机床设备出现故障后会产生报警信息，维修人员需要结合报警信号科学、合理地进行处理。2.2.3参数检查法数控机床设备电气故障的诊断与处理，还可运用参数检查法。电气故障发生的部分原因是设备参数出现问题，因此当数控机床设备数控系统出现故障或是报警信号消失时，应该采用参数检查法检查与核对相应的系统参数。通常情况下，不需要修改系统基本参数，需要将整项参数存放到磁泡存储器中。倘若受到外界因素的影响与干扰或者设备电量不足，其部分参数会混乱或者丢失，从而影响到数控机床设备的稳定、正常运转。对数控机床设备电气故障进行处理，可通过修复参数的方法。数控机床设备长期运转易导致性能参数发生变化，需要不定期调整参数，并对其进行研究。通常，一些数控机床设备出现电气故障主要是相关操作人员并未及时对电气元器性能参数进行调整与修正，可称为软故障。因此，这对相关维修人员提出了更高要求，需要维修人员具有丰富的电气调试经验，从而有效处理数控机床设备的故障问题。

3、结论

综上所述，数控机床设备存在一些常见的电气故障，相关技术人员需要掌握电气故障的应急处理措施，掌握电气故障诊断的相关步骤，可采用直接观察法、自我诊断功能法以及参数检查法等进行操作，从而尽快处理故障问题。

keyword：数控机床

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电焊铁应放在手前，远离修理电路板。适当修整铁头，配合集成电路的焊接，而且还要防止在焊接进程中会碰到其他部件。丈量线路之间的电阻时，应堵截电源。丈量电阻时赤色与黑色测试引线应替换两次，电阻值为参考值。大都数控车床的电路板刷有阻焊膜，所以应找到相对应的焊点作为测试点。不要清除焊锡膜，部分板上都刷有绝缘层，只有刀片上才能挂掉焊点位置的绝缘层。

数控车床不应随便堵截生产线，部分修理人员有一定的家电修理经历，习气将电线断开。可是数控车床设备上的电路板上大都都是双面金属孔或多层孔化板。印线细密，一旦堵截，不容易对其进行焊接。切线也很容易被切下相邻的线，在切一条线时不可与线分隔，需要同时切数行。部件不得随意进行拆开、替换。部分人在没有毛病部件的状况下仅仅基于对哪个部件被损坏，马上对其进行替换或拆开，这样的误判率会提高，被拆部件的人为损坏率也很高。

keyword：数控车床

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1、对刀具的直径和长度输入过错。

2、对工件的尺度和其他相关的几许尺度输入过错以及工件的初始方位定位过错。

3、数控车床的工件坐标系设置过错，或者机床零点在加工过程中被重置，而发作改变，机床磕碰大多发作在机床快速移动过程中，这时候发作的磕碰的危害也最大，应肯定防止。

所以操作者要特别注意数控车床在履行程序的初始阶段和机床在更换刀具的时候，此刻一旦程序编辑过错，刀具的直径和长度输入过错，那么就很容易发生磕碰。在程序完毕阶段，数控轴的退刀动作顺序过错，那么也可能发作磕碰。为了防止上述磕碰，操作者在操作数控车床时，要充分发挥五官的功能，调查机床有无异常动作，有无火花，有无噪音和异常的响动，有无震动，有无焦味。金属加工微信内容不错，值得关注。发现异常情况应立即中止程序，待机床问题解决后，机床才干持续作业。

keyword：数控车床

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一、主轴箱过热

1.主轴长时间超速运转而发热。解决方法:调整轴承间隙,适当降低主轴转速(不得超过该型号机床设计最高转速),轴承上高速油脂。

2.主轴轴承间隙过紧而发热。解决方法:参照第四节调整主轴的轴承间隙。

3.主轴轴承生锈磨损而发热,长时间疲劳使用或在潮湿环境下都可能使主轴个部分磨损或生锈;存放时间过长不使用也会引起轴承生锈。解决方法:清洗轴承调整油脂或更换轴承。

二、机床床身发生扭曲。

机床安装不当造成机床床身扭曲变形会使大拖板移动时过紧或卡住。解决方法:放松地脚螺栓使其还原,重新安装,确保床脚与工作台面水平(此方案为新机床在安装时的解决方式)。

三、导轨进屑

松开大拖板护板螺丝,拆下大拖板护板与护板护垫。然后松开大拖板压板螺丝,取下大拖板压板,用煤油将拖板和导轨洗净。仪表车床使用一段时间需要更换大小拖板护板护垫(羊毛毡),以防铁屑进入。

keyword：数控仪表车床

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主电机有水平皮带轮中置与垂直皮带轮侧置两种安装方式：

水平安装电机与机床在同一平面；垂直电机安装在机床下方。

联结主轴与电机的三角带必须调整到松紧适宜的程度。

使用一段时间后，要对机床主轴轴承进行适当调整，确保轴承的最优间隙，以保证机床的使用效果及产品的稳定，提高主轴轴承的使用寿命。

数控仪表车床一般使用弹簧夹头夹紧工件，开机前必须确认无任何危及您和周围其他人员人身安全和设备安全的隐患存在。

机床为机电一体化设计，须经培训后才能操作机床。

keyword：数控仪表车床

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