DEEP HOLE DRILLING INSERTS,LATHE MACHINE CUTTING TOOLS,CARBIDE INSERTS

DEEP HOLE DRILLING INSERTS,LATHE MACHINE CUTTING TOOLS,CARBIDE INSERTS,We offer round, square, radius, and diamond shaped carbide inserts and cutters.

Cnmg

Using Cameras to Align Tools and Spindles on Swiss

Misalignment can cause machining misfires. For Swiss-type lathes, it is important that tools on the gang slide are aligned with the main spindle’s centerline and backworking tools are aligned with the subspindle’s centerline to ensure accuracy and prevent breakage of tools such as small boring bars. Similarly, the main and subspindle centerlines must be aligned with each other for accurate part pickoff operations.

Ben York, president of Swiss Turn Solutions, a consulting company that offers the Theory 168 line of machine tool accessories, says a common way to check alignment is to use interapid- or coaxial-type dial indicators installed in spindles. For example, installing an indicator in a subspindle to probe a rotating turned bar in the main spindle is one way to align both spindles with each other. However, Mr. York explains that there can be issues using these devices to perform such alignments. In some cases, he says an indicator simply might not fit in a Swiss-type’s VBMT Insert guide bushing or general workzone. If it does fit, the distance that the indicator sticks out of the spindle typically causes alignment error. Plus, a transfer measurement from the main spindle to the subspindle to the tools is typically required for aligning tools with the main spindle, which can lead to error stacking.

Mr. York says his company developed a non-contact camera system that offers a more precise and repeatable way to determine not only the current state of spindle and tool alignment, but also the amount of misalignment to correct it. The Perfect Zero Swiss system uses cameras that are installed in the main and subspindles to enable the user to view tools under magnification to determine their actual position when they are moved to the theoretical spindle centerline position. The system’s Carbide Turning Inserts software then determines how much the tool must be moved to bring it to the actual centerline position.

To perform tool alignment with the main spindle, the user installs an 50× magnification camera in the guide bushing and plugs the camera into the system’s dedicated computer with Perfect Zero software via a USB port. A 5-minute calibration cycle that uses a supplied target as a reference point enables the software to determine and record the location of the spindle centerline. Next, each tool is driven to the spindle centerline and a magnified image of the tool is shown on the computer screen. Crosshairs on the screen represent the spindle centerline, and the distance that the tool center point (for drills) or insert edge (for boring bars) is away from the centerline can be seen. The gang slide is then manually moved to align the tool with the spindle centerline. The software, in combination with machine position, calculates the difference, which the user inputs into the control.

Guide-bushing cameras are available in diameters as small as 10 mm. A more general shank-type camera can be installed in a subspindle to perform similar alignment of backworking tools to the subspindle centerline as well as aligning main and subspindle centerlines. The latter is important to ensure proper subspindle part pickoff from the main spindle for subsequent backworking operations. Mr. York cites a shop that was experiencing a problem with small parts being scratched when the subspindle picked them off the main spindle. This shop tried using a dial indicator installed in the main spindle, but the device could not align the spindles as accurately as needed. However, a Perfect Zero camera installed in the guide bushing could be positioned 0.1 inch away from a target installed in the subspindle (essentially where the part would be picked) and proper alignment was attained.

Mr. York says the system is valuable even for very accurate Swiss-types as it can detect positioning error because of tool runout or variability when small tools are installed in collet-style toolholders. It achieves position repeatability of 0.0002 inch and can be used for tools as small as 0.005 inch in diameter. The system includes a guide-bushing camera, a shank-type subspindle camera, a dedicated laptop computer with Perfect Zero software, various visual calibration targets and a portable service cart. The subspindle camera is a universal model and can be used in lathes as well as mills to determine work coordinates, especially for small parts and parts made from delicate materials. It also can be used on a 3D printer to determine the position of a substrate onto which another material will be printed.


The Carbide Inserts Blog: https://charlesbar.exblog.jp/

The 4 Have to know Skills if you Wanna Get the Job as a Lathe Operator

When we talk about the master of the machining center, our first impression is that he is a master with the ability to program, set the tool, debug, clamp and process the parts. In fact, any industry is the same, to become a master of its own needs is accumulated over time, step-by-step process, and can not be achieved overnight. As far as the operation of CNC machining center is concerned, there are many methods and skills that can make us get twice the result with half the effort, but the operation is still too tired, so we have to do programming sooner or later

Contents hide 1Programming 2Direct knife setting 3DebuggingProgramming

CNC machining center requires high accuracy of products. When programming, we should fully consider two aspects, one is the processing sequence, the other is the parameters, such as speed, feed, cutting depth.

The processing sequence is generally as follows: first drill, then flat end. This can prevent shrinkage during drilling; First rough machining, then fine machining; The first machining tolerance is large, and the last machining tolerance is small.

According to Carbide Drilling Inserts the hardness of the material, we choose reasonable speed, feed rate and cutting depth: carbon steel materials choose high speed, high feed rate and large cutting depth. Cemented carbide choose low speed, low feed, small cutting depth. Titanium alloy has low speed, high feed rate and small cutting depth.

Direct knife setting

First, select the center of the right end face of the part as the tool setting point, and set it as the zero point. After the machine returns to the zero point, each tool that needs to be used will set the center of the right end face of the part as the zero point; When the tool contacts the right end face, input Z0 and click measure, the measured value will be automatically recorded in the tool compensation value, which means that the z-axis tool setting is good, the x-axis tool setting is trial cutting tool setting, and the outer circle of the part is Deep Hole Drilling Inserts less with the tool. Input X20 to measure the outer circle of the part to be turned (for example, X is 20mm). Click measure, the tool compensation value will automatically record the measured value, and then the x-axis is also good;

This direct tool setting method, even if the machining center is powered off, will not change the tool setting value after the call is restarted again. It can be used for mass production of the same part for a long time, and it does not need to reset the tool when the equipment is shut down.

Debugging

After the parts are programmed, the trial cutting and debugging should be carried out after the tool is properly adjusted. In order to prevent the program errors and tool setting errors, resulting in the collision accident.

We should first simulate the machining of the empty stroke, and translate the tool to the right in the coordinate system of the machining center, which is 2-3 times of the total length of the part; Then start the simulation processing. After the simulation processing is completed, confirm that the program and tool setting are correct, and then start the processing of the parts. After the first part is processed, self check is carried out first to confirm that it is qualified, and then go to the full-time inspector for inspection. After the full-time inspector confirms that it is qualified, this means the end of debugging.

Knife collision prevention techniques

The impact of the tool in the machining center is very bad to the accuracy of the equipment, and the influence on different types of machine tools is different. Generally speaking, it has a great influence on the machine tools with low rigidity. Therefore, for high-precision machining center, collision must be eliminated absolutely. As long as the operator carefully and master certain anti-collision methods, collision can be prevented and avoided completely. There are only three reasons for the tool collision: one is the wrong input of the diameter and length of the tool; Second, the input error of workpiece size and other related geometric dimensions and the initial position positioning of workpiece are wrong; Third, the workpiece coordinate system of the machining center is set incorrectly, or the machine zero point is reset during the processing process, and the machine tool collision occurs mostly in the process of rapid movement of the machine tool. The collision at this time is also the most harmful and should be avoided absolutely.

In order to avoid the above collision, the operator should give full play to the functions of five functions when operating the machine tool. Observe whether the machine tool has abnormal action, sparks, noise and abnormal sound, vibration and coke smell. If any abnormal situation is found, the program shall be stopped immediately. The machine can not continue to work until the problem is solved.

The operation of CNC machining center is based on the basic operation, basic machining knowledge and basic programming knowledge of machine tool. The operation skill of CNC machine tool is not constant, it is an organic combination of the operator's imagination and hands-on ability, and it is an innovative labor.


The Carbide Inserts Blog: http://worthy.blog.jp/
カテゴリ別アーカイブ
  • ライブドアブログ