Vertical milling head C-axis installation precision detection device

Abstract

The utility model provides a vertical milling head C shaft installation precision detection device, which comprises a gradienter and a milling head with a C shaft arranged at the tail end of a ram, the gradienter is arranged on the milling head and is close to the joint of the milling head and the ram, a glass tube with scale marks is arranged in the center of the gradienter, the scale marks are zero in the middle, and positive scale values are arranged on one side. The other side is a negative scale value; the glass tube is in a lengthwise circular curve shape, the tube is filled with liquid, and a bubble is reserved. The gradienter is finely adjusted through the adjusting mechanism and is perpendicular to the axis of the C shaft. The perpendicularity error of the C axis in the X direction and the Y direction can be measured through the reading of the gradienter, and therefore whether adjustment is needed or not is judged. The device is simple and easy to use, does not need additional equipment, is suitable for precision detection at any time, and improves the machine tool precision and machining quality.

Description

Technical Field

[0001] This utility model relates to the machine tool industry and is a vertical milling head installation accuracy detection device. It is mainly used to detect the perpendicularity of the C-axis axis of the vertical milling head to the horizontal plane, and is especially suitable for geometric accuracy detection and adjustment of heavy-duty CNC gantry milling machines with high gantry height during installation, debugging or machine tool maintenance. Background Technology

[0002] In CNC gantry milling machines, the vertical milling head is mounted at the front end of the ram and feeds vertically up and down along the slide together with the ram. The moving axis of the ram is called the Z-axis of the machine tool. In some machine tools, the vertical milling head also has a rotation function, enabling multi-axis linkage. The axis around which the vertical milling head rotates around the Z-axis is called the C-axis. For heavy-duty CNC milling machines with high load-bearing capacity and a large machining range, the distance from the ram to the ground is long. Therefore, special tooling is often required during machine tool debugging to complete the accuracy testing of the ram and milling head. In daily use, due to the extensive preparation work required for machine tool testing, the frequency of scheduled inspections is low and the time spent is long. If the machine tool condition changes, resulting in out-of-tolerance end-point accuracy, it is difficult to detect in time, which is one of the main factors leading to machining defects. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a vertical milling head C-axis mounting accuracy detection device to facilitate the precision inspection of heavy-duty machine tools and promptly identify the sources of machine tool errors. This detection device is mounted on the milling head and can be used for inspection at any time.

[0004] The technical solution provided by this utility model is: a vertical milling head C-axis installation accuracy detection device, including a level and a milling head with a C-axis installed at the end of the slide. The level is installed on the milling head and close to the connection between the milling head and the slide. There is a glass tube with scale lines in the center of the level. The scale line is zero in the middle, one side is a positive scale value, and the other side is a negative scale value. The glass tube is longitudinally long and curved, filled with liquid, and has an air bubble.

[0005] The level is equipped with a level adjustment mechanism, which includes a pair of clamping bolts and a pair of lifting bolts arranged in pairs at both ends of the level. Each end of the level mechanism has a through hole for mounting the clamping bolts and a threaded hole for mounting the lifting bolts. The milling head has a level mounting position and a threaded hole. The level mounting position has a mounting surface for the level adjustment mechanism, the normal of which is parallel to the C-axis. On the mounting surface, the opening of the threaded hole corresponds to the clamping bolts, and the position corresponding to the lifting bolts is a flat surface. Adjustment is achieved by pressing down and lifting the level using the bolts.

[0006] The vertical milling head C-axis mounting accuracy testing device described in this invention, before testing, uses a level adjustment mechanism to fine-tune the plane in which the level rotates to ensure it is perpendicular to the C-axis axis. Therefore, by rotating the C-axis and taking readings from the level, the perpendicularity error of the C-axis to the horizontal plane in both the X and Y directions can be measured, thus determining whether this accuracy requires adjustment. Since no other equipment is needed during the testing process, accuracy testing can be performed at any time. Attached Figure Description

[0007] Figure 1 : Schematic diagram of the installation location of the level;

[0008] Figure 2 Schematic diagram of the components of a level;

[0009] Figure 3 Adjustment of organizational structure diagram;

[0010] Figure 4 : Schematic diagram of the testing process. Detailed Implementation

[0011] Figure 1 The diagram shows the installation position of the level. The milling head 2 is installed at the end of the slide ram 1, and the level 3 is installed on the housing of the milling head 2, near the connection between the milling head 2 and the slide ram 1. The level 3 rotates with the milling head 2 along the C-axis.

[0012] Figure 2 A schematic diagram of the level. The level 3 has a glass tube with graduations 5 in the center. Graduation 5 is zero in the middle, with positive graduations on one side and negative graduations on the other. The glass tube is longitudinally elongated and curved, filled with liquid, and contains an air bubble 4. During testing, the position of the air bubble 4 can be used to determine the perpendicularity of the C-axis to the ground.

[0013] The level is equipped with a level adjustment mechanism, which includes a pair of clamping bolts 7 and a pair of lifting bolts 6 arranged in pairs at both ends of the level. Each end of the level mechanism is provided with a through hole 9 for installing the clamping bolts and a threaded hole 10 for installing the lifting bolts. The milling head 2 is provided with a level mounting position and a threaded hole 11. The level mounting position has a mounting surface for the level adjustment mechanism. The normal of the mounting surface for the level adjustment mechanism is parallel to the C-axis. On the mounting surface for the level adjustment mechanism, the opening of the threaded hole 11 is located at the position corresponding to the clamping bolts, and the plane 12 is located at the position corresponding to the lifting bolts.

[0014] Figure 3The diagram illustrates the adjustment mechanism. When adjusting the angle of the level 3, taking the diagram as an example, to raise the right side of the level, first loosen the right-side clamping screw 7, then rotate the right-side fine-tuning screw 6 to raise the right side of the level 3. When adjusted to the appropriate position, re-tighten the right-side clamping screw 7.

[0015] Figure 4 This is a schematic diagram of the testing process. First, check the accuracy of the level 3 itself. When the level 3 is in the X+ position, read the scale value at the location of the bubble 4. Then, rotate the milling head 2 along the C-axis to make the level 3 reach the X- position and read the scale value at the location of the bubble 4. The scale value at this time should be exactly the opposite of the scale value obtained in the previous step. For example, if it is +a at X+, it should be -a at X-. If the absolute values ​​of the two are not the same, the level 3 is corrected by adjusting the mechanism. After the correction is completed, it can be considered that the plane in which the level 3 rotates is perpendicular to the C-axis. At this point, by rotating the milling head 2 along the C-axis, the level 3 is positioned in the X+, X-, Y+, and Y- directions respectively. When the level 3 is in one of the four directions, the bubble 4 should be in the middle of the scale line 5. If there is a deviation, it indicates that the C-axis of the milling head 2 is not perpendicular to the horizontal plane in the X or Y direction. Based on the magnitude of the difference, it can be determined whether to continue using the machine tool or make necessary precision adjustments.

Claims

1. A perpendicular milling head C-axis mounting precision detection device, characterized in that The horizontal instrument is installed on the milling head and close to the joint of the milling head and the ram, the horizontal instrument has a glass tube with scale line in the middle, the scale line is zero in the middle, positive scale value on one side and negative scale value on the other side; the glass tube is long and circular, the tube is full of liquid and has a bubble.

2. The vertical milling head C-axis installation precision detection device according to claim 1, characterized in that The horizontal instrument is installed on the milling head and close to the joint of the milling head and the ram, the horizontal instrument has a glass tube with scale line in the middle, the scale line is zero in the middle, positive scale value on one side and negative scale value on the other side; the glass tube is long and circular, the tube is full of liquid and has a bubble. The horizontal instrument is installed on the milling head and close to the joint of the milling head and the ram, the horizontal instrument has a glass tube with scale line in the middle, the scale line is zero in the middle, positive scale value on one side and negative scale value on the other side; the glass tube is long and circular, the tube is full of liquid and has a bubble.

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