深圳市洗星科技有限公司
操作 4 軸 CNC 機床時，如何確定旋轉軸的旋轉中心？
Nowadays, a four-axis rotary table is a common piece of equipment in the machine shop. In order to complete the machining of multiple faces in one coordinate, the programming coordinates must be synchronized with the coordinates of the rotary table. In this article, we will share a method to determine the rotation center of a 4-axis rotary table.
Steps to Determine Center Rotation of a 4-Axis Rotary Table
Here, we show a 4-axis rotary table that rotates around the X-axis of a machine tool, where the axis of rotation is called the A-axis. In a word, all we need to do is to determine the Y/Z coordinates of the center of rotation on the 4-axis machine.
In addition, the X coordinate values are determined by the placement of the product, so we won’t go into detail here. The following are the specific steps to determine the center of rotation.
Step 1: Calibrate the Fixture Reference Plane
Firstly, use the calibration table to calibrate the fixture datum plane (the yellow surface). Then, set the calibrated datum plane to the 0 degree position of the A-axis.
Step 2: Set the Fixture Datum Plane
After setting the datum plane, we need to rotate the A-axis 90 degrees positive. Then, use a centering bar to measure the machine position where the datum plane is located. In the relative coordinate setting, set the Y coordinate to “0”.
Step 3: Measure the Value of the Datum Plane
Next, rotate the A-axis 180 degrees in the negative direction. Same as the last step, we need to measure the machine position on the other side of the datum using the centering bar. Then, check the current relative Y value of the machine. For example, if we assume the Y value is “92mm”, the centering diameter is 10mm centering diameter, and the fixture datum to the rotary table is 41mm.
Step 4: Determine the Position of the Rotation Center in the Y-axis
Referring to the values in the previous step, we can calculate that 92/2 = 46mm, so half of the Y value of 46mm. Then, we move the centering bar 46mm negatively towards the Y-axis.
As shown by the picture, the centering bar is now just aligned with the rotational axis of the rotary table. At the time, the position of the alignment point is the zero point of the Y value of the machine. In this way, we have completed half of the operation work.
Step 5: Find the Position of the Rotation Center in the Z-axis
Finding the Z value is relatively simple. After the rotary table returns to the A0 position, the zero point of the Z-axis of the rotary axis can be determined by moving down 41mm with the datum surface as the calculation base. This value is calculated using the formula “(92-10)/2”, where 92 is the Y-value found earlier and 10 is the diameter of the centering bar. By applying this formula, the Z value is determined.
Finally, the intersection of the Z and Y axis is the rotation center around the X axis. With these steps, we can determine the rotation center of the 4-axis rotary table.
Coordinate Setting in Programming
After determining the center value, in the programming software, we need to synchronize the program coordinates with the rotation axis of the 4-axis rotary table (relative distance of the coordinates to the fixture datum). Then we can output the program for all machined surfaces. So, the machining of multiple faces of a part can be completed by one coordinate.
Conclusion
By determining the rotation center of the 4-axis rotary table, we can complete the machining of multiple surfaces or four-axis simultaneous machining in a single clamping process with one coordinate. It also avoids the trouble of setting the machining coordinates for each machined surface during multi-face machining. In this way, we can ensure relative accuracy between the machined surfaces.
建議
如何透過設計製程路徑和夾具來加工多面體鋁合金零件？
在加工製造領域中，選擇適當的加工策略對於提高生產效率非常重要。一般而言，多面體加工零件具有複雜的幾何形狀和嚴格的公差要求。因此，如何選擇合適的加工路徑加工這類零件，需要綜合考慮。在這篇文章中，Washxing 分析了多面體鋁合金零件的不同加工路徑，並比較了 3+2 軸 CNC 加工與 3+2 軸 CNC 加工的優劣。
如何防止大型薄壁殼體零件在 CNC 加工過程中發生翹曲和變形？
大型薄壁殼體零件在加工過程中容易產生翹曲與變形。在本文中，我們將介紹一個大型薄壁零件的散熱片案例，討論在一般加工製程中的問題。此外，我們也會提供一個最佳化的製程與夾治具解決方案。讓我們進入正題！本案例是關於一個由 AL6061-T6 材料製成的殼狀零件。以下是它的確切尺寸。整體尺寸：455*261.5*12.5mm支撐壁厚：2.5mm散熱片厚度：1.5mm...
加工允許額解說：其計算方式及注意事項
加工余量是製造業的基本概念。它是 CNC 精密加工中常見的工程實務，可確保尺寸精度、表面品質，並生產可靠的功能性零件，適用於航空、國防和醫療等各種產業。本文嘗試回答這個問題：什麼是加工余量？我們將深入探討加工余量的概念，並討論為什麼機械師會留下加工余量？
All You Need To Know Engineering Drawing And Its Elements
Drawing or painting a picture is a great technique to convey one’s thoughts. Within the broad concept of industrial design, engineering drawing or technical drawing is an essential skill for designers working with the production of real objects. Therefore, engineering drawing is arguably one of the fundamentals of engineering design that serves several critical purposes. It is a standard technical drawing carrying essential design information, a mode of communication between different eng...
