Vertical machining center height difference measuring instrument

Abstract

In order to solve the problem that in the prior art, when the height of a vertical machining center is measured, human errors influence a measurement result, and in consideration of the convenience of field tool setting operation, the utility model discloses a height difference measuring instrument for the vertical machining center, which comprises a dial indicator and is characterized by further comprising a mounting component, the mounting part comprises a mounting part used for mounting the dial indicator and a connecting part used for being connected with a main shaft of the vertical machining center, and a lower probe rod of the dial indicator extends out of the mounting part. According to the utility model, the measurement action process of the reference surface height difference can be simplified, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vertical machining centers, in particular to a height difference measuring instrument for vertical machining centers. Background Art

[0002] Currently, tool setting in machining centers begins with selecting a reference plane P0 at a specific Z-axis height. The height compensation value for each tool relative to this reference plane is then measured using specialized instruments, and the results are entered into the tool compensation settings for each tool on the machine. Because each workpiece has a different clamping height and programming reference plane, the height difference ∆P between the reference plane P1 of the workpiece's actual machining origin and the reference plane P0 used for the tool compensation setting must be entered into the Z-axis field of the machine's corresponding coordinate system before machining.

[0003] The auxiliary instrument used in the existing technology for calculating ∆P is a micrometer with a magnetic base. The specific operation method is: vertically attach the magnetic base to a suitable position on the machine tool spindle, adjust the dial rod and measuring probe to a vertical direction, and control the movement of the machine tool spindle. First, the probe is used to detect the P0 surface. After the micrometer pointer returns to zero, the Z-axis data in the machine tool relative coordinate system is returned to zero. Then, the probe is used to detect the P1 surface. After the micrometer pointer returns to zero, the Z-axis data in the machine tool relative coordinate system at this time is read. This value is the height difference ∆P between the two reference surfaces.

[0004] Current technology uses a magnetic base to attach to the machine tool spindle. Due to factors such as the magnetic adsorption force and the rigidity of the dial stem, slight shaking or displacement may occur during the measurement process, affecting the measurement accuracy. When using a micrometer with a magnetic base, the operator needs to manually contact the probe with the measuring surface and adjust the micrometer pointer to zero. These processes are easily affected by human factors, such as uneven operating force and inaccurate readings. The magnetic base needs to be attached to the appropriate part of the machine tool spindle, and the direction of the dial stem and measuring probe needs to be adjusted. The installation and debugging process is relatively cumbersome and time-consuming.

[0005] In addition, actual processing is also affected by the size and structure of individual workpieces, which may limit the installation of the magnetic meter base, or be limited by the length of the meter rod of the magnetic meter base, making it impossible to perform normal measurement operations. Summary of the Invention

[0006] In order to solve the deficiencies of the prior art, the purpose of the present invention is to provide a height difference measuring instrument device for a vertical machining center which is convenient to operate and has high detection efficiency.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A height difference measuring instrument for a vertical machining center includes a micrometer and is characterized in that it also includes a mounting component, the mounting component includes a mounting portion for mounting the micrometer and a connecting portion for connecting to the spindle of the vertical machining center, and the lower probe rod of the micrometer extends out of the mounting portion.

[0009] Furthermore, the connecting portion is rod-shaped and disposed at the upper end of the mounting portion, with its axis parallel to the axis of the lower probe rod. The connecting portion can be secured to the spindle of a vertical machining center via a chuck and toolholder. This allows the measuring instrument to be stored in the machine tool tool library like a milling cutter and directly accessed using a callout command, which is identical to a tool callout command.

[0010] Furthermore, the mounting portion is cylindrical, and a circular cavity concentric with the mounting portion is opened on the front end surface of the mounting portion, the side wall of the cavity of the mounting portion cooperates with the outer cylindrical surface of the micrometer, and the bottom surface of the cavity of the mounting portion fits with the back of the micrometer.

[0011] Furthermore, an upper notch extending through the mounting portion is provided on the upper side of the mounting portion, and a lower notch extending through the mounting portion is provided on the lower side of the mounting portion, with the upper and lower probe rods of the micrometer extending from the upper and lower notches, respectively. The upper notch is larger than the lower notch and can be configured in various shapes, such as a U-shape or a rectangle. The notch is primarily used to allow the upper and lower probe rods to extend from the mounting portion, and can also limit the position of the upper and lower probe rods of the micrometer.

[0012] Furthermore, in order to facilitate clamping and positioning of the mounting portion during machining, a group of mutually parallel planes are provided on the left and right sides of the outer cylindrical surface of the mounting portion.

[0013] Furthermore, the mounting portion and the dial indicator are fixed by gluing, that is, before the dial indicator is mounted in the cavity of the mounting portion, glue is pre-coated on the side walls and bottom surface of the cavity of the mounting portion, thereby fixing the dial indicator inside the mounting portion.

[0014] Preferably, in order to facilitate the removal of the dial indicator during actual use, the mounting portion and the dial indicator can be fixed by bolts. That is, at least one set of threaded through holes is provided on the side walls of the mounting portion cavity, and bolts are respectively inserted into the threaded through holes. When the dial indicator is installed in the mounting portion cavity, the bolts are tightened to fix the dial indicator. When the dial indicator needs to be removed, the bolts are loosened.

[0015] Preferably, in order to enable the vertical machining center height difference measuring instrument provided by the utility model to be applicable to more usage scenarios and needs during use, the connecting part can be set as a telescopic rod structure, including an outer cylinder body for connecting to the vertical machining center spindle and an inner rod connected to the mounting part, and one or more threaded through holes are opened on the outer cylindrical surface of the outer cylinder body, and each pair of threaded through holes are arranged radially opposite to each other, and the length of the telescopic rod is fixed by tightening the inner rod with bolts. Beneficial effects

[0016] The measuring instrument of the utility model can be installed on the main shaft of a vertical machining center through a connecting portion provided by the installation component, and has high detection repeat positioning accuracy and high measurement stability.

[0017] The measuring instrument of the present invention does not require any preparation during use. When it is necessary to measure the height difference of the reference surface, only an instruction needs to be input to directly call out the measuring instrument. This will reduce manual intervention and thus reduce the impact of human errors on the measurement results.

[0018] 3. This measuring instrument features automated control, allowing operators to perform measurements from outside the machine tool. This not only improves operational convenience but also reduces the risks associated with operating inside the machine tool. Furthermore, this measuring instrument can be equipped with an intelligent user interface, making operation even simpler and more intuitive. Operators can easily set measurement parameters and view measurement results using a touchscreen or buttons, reducing the technical requirements and training costs.

[0019] 4. The measuring instrument of this utility model only requires one detection during use, which improves detection efficiency, saves processing preparation time, and reduces labor intensity. The existing technology generally takes 5 minutes to complete a measurement operation, while the measuring instrument provided by this utility model generally completes the entire measurement process in about 50 seconds. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of Example 1 of the present utility model;

[0021] Figure 2 This is a schematic structural diagram of the installation components in Example 1 of the present utility model.

[0022] The meanings of the reference numerals in the figure are: 1. micrometer, 11. lower probe rod, 12. upper probe rod, 2. mounting component, 21. mounting portion, 22. connecting portion, 23. plane, 211. upper notch, 212. lower notch, 213. cavity side wall, 214. cavity bottom. DETAILED DESCRIPTION

[0023] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments. Any improvement or replacement based on the basic spirit of the present embodiment still falls within the scope of protection required by the claims of the present invention.

[0024] Example 1: Figure 1-2 As shown, this embodiment provides a vertical machining center height difference measuring instrument, including a micrometer 1, and also includes a mounting component 2, the mounting component 2 includes a mounting portion 21 for mounting the micrometer 1 and a connecting portion 22 for connecting to the vertical machining center spindle, and the lower probe rod 11 of the micrometer 1 extends out of the mounting portion 21. The micrometer 1 is used to perform measurement operations and display scale data, wherein the micrometer 1 uses commonly used specifications in the market, and specific specifications can be configured according to the actual measurement accuracy requirements. The mounting component 2 is mainly used to protect and support the internal micrometer 1 and to fix the entire measuring instrument to the vertical machining center spindle. The material of the mounting component 2 is preferably metal, and other materials can also be selected according to actual needs, as long as it can achieve the protection and support functions and can match the chuck and tool holder to be fixed to the vertical machining center spindle.

[0025] The connecting portion 22 is rod-shaped and is disposed at the upper end of the mounting portion 21. The axis of the connecting portion 22 is parallel to the axis of the lower probe rod 11. The connection between the connecting portion 22 and the mounting portion 21 can be formed as a single piece, or can be formed separately and then screwed, interference-fitted, or glued. The connecting portion 22 can be fixed to the spindle of the vertical machining center via a chuck and a tool holder. In this way, the height difference measuring instrument for the vertical machining center provided in this embodiment is stored in the tool library of the machine tool like a milling cutter during use and can be directly called out for use by calling out instructions, which are the same as the tool call-out instructions.

[0026] The mounting portion 21 is cylindrical, and a circular cavity concentric with the mounting portion 21 is provided on the front end face of the mounting portion 21. The cavity sidewall 213 of the mounting portion 21 cooperates with the outer cylindrical surface of the micrometer 1, and the bottom surface 214 of the cavity of the mounting portion 21 fits with the back of the micrometer. As other implementations in this embodiment, the outer shape of the mounting portion 21 can also be designed to match the actual internal structure of the machine tool into other shapes, such as: the outer shape of the mounting portion 21 can also be set to a rectangular parallelepiped, a cube or other polyhedron shape. The upper side of the mounting portion 21 is provided with an upper notch 211 that passes through the mounting portion, and the lower side of the mounting portion 21 is provided with a lower notch 212 that passes through the mounting portion. The upper probe rod 12 and the lower probe rod 11 of the micrometer 1 extend from the upper notch 211 and the lower notch 212 respectively. The upper notch 211 is larger than the lower notch 212. The upper and lower notches 211 and 212 can be configured in various shapes, such as a U-shape or a rectangle. The upper and lower notches are primarily configured to allow the upper and lower probe rods to extend from the mounting portion, and also to limit the position of the upper and lower probe rods of the dial gauge 1. The clearance tolerance between the upper probe rod 12 and the upper notch 211, and between the lower probe rod 11 and the lower notch 212, of the dial gauge is controlled to be approximately 0.02mm to 0.05mm, ensuring smooth sliding of the dial gauge 1 when it is installed into or removed from the mounting portion 21.

[0027] In order to facilitate clamping and positioning of the mounting portion 21 during machining, a set of parallel planes 23 are provided on the left and right sides of the outer cylindrical surface of the mounting portion 21 .

[0028] The mounting portion 21 and the micrometer 1 are fixed by gluing, that is, before the micrometer 1 is installed in the cavity of the mounting portion 21, glue is pre-coated on the side walls and bottom surface of the cavity of the mounting portion 21, thereby fixing the micrometer 1 inside the mounting portion 21.

[0029] The method for using the vertical machining center height difference measuring instrument provided in this embodiment is as follows:

[0030] Before machining, the reference plane P0 is detected and the Z-axis mechanical coordinate value D0 of the position is recorded at the same time;

[0031] In each subsequent measurement of the reference surface height difference ∆P, it is only necessary to detect the mechanical coordinate value D1 of the reference surface P1 to obtain the height difference value, ∆P = D1 - D0.

[0032] The detection mentioned in the above method of using the height difference measuring instrument of the vertical machining center can be achieved through the following actions: After installing the measuring instrument on the spindle, control the movement of the X and Y axes of the machine tool to move it to the top of the reference surface area to be measured, control the Z axis of the machine tool spindle to move it vertically downward, and when the micrometer probe contacts the reference surface, continue to slowly move the spindle downward. The micrometer probe will be compressed and drive the pointer reading to change until the micrometer pointer reading is zero, thereby completing the detection operation.

[0033] The present embodiment provides a vertical machining center height difference measuring instrument, including a micrometer 1 and a mounting component 2, wherein the mounting component 2 includes a mounting portion 21 for mounting the micrometer 1 and a connecting portion 22 for connecting to the vertical machining center spindle, and the lower probe rod 11 of the micrometer 1 extends out of the mounting portion 21. The micrometer 1 is used to perform measurement operations and display scale data, wherein the micrometer 1 uses commonly used market specifications, and specific specifications can be configured according to the actual measurement accuracy requirements. The mounting component 2 is mainly used to protect and support the internal micrometer 1 and to fix the entire measuring instrument to the vertical machining center spindle. The material of the mounting component 2 is preferably metal, and other materials can also be selected according to actual needs, as long as it can achieve the protection and support functions and can match the chuck and tool holder to be fixed to the vertical machining center spindle.

[0034] The connecting portion 22 is rod-shaped and is arranged at the upper end of the mounting portion 21. The axis of the connecting portion 22 is parallel to the axis of the lower probe rod 11. The connecting portion can be set as a telescopic rod structure, including an outer cylinder for connecting to the spindle of the vertical machining center and an inner rod connected to the mounting portion. The connection between the inner rod and the mounting portion can be integrally processed or separately processed and then realized by screw connection, interference fit or gluing. One or more threaded through holes are opened on the outer cylindrical surface of the outer cylinder, and each pair of threaded through holes are arranged radially opposite to each other. The length of the telescopic rod is fixed by tightening the inner rod with bolts.

[0035] The connection part is set as a telescopic rod structure, which makes the vertical machining center height difference measuring instrument provided in this embodiment adaptable to the measurement needs of more vertical machining centers. For example, according to different processing positions or measurement requirements in vertical processing, the rod length can be flexibly changed, thereby improving its versatility and practicality.

[0036] The connecting portion 22 can be fixed to the spindle of the vertical machining center via a chuck and a tool holder. Thus, during use, the vertical machining center height difference measuring instrument provided by this embodiment can be stored in the tool library of a machine tool just like a milling cutter and can be directly called out for use via a call-out command, which is the same as the call-out command for a tool.

[0037] The mounting portion 21 is cylindrical, and a circular cavity concentric with the mounting portion 21 is provided on the front end face of the mounting portion 21. The cavity sidewall 213 of the mounting portion 21 cooperates with the outer cylindrical surface of the micrometer 1, and the bottom surface 214 of the cavity of the mounting portion 21 fits with the back of the micrometer. As other implementations in this embodiment, the outer shape of the mounting portion 21 can also be designed to match the actual internal structure of the machine tool into other shapes, such as: the outer shape of the mounting portion 21 can also be set to a rectangular parallelepiped, a cube or other polyhedron shape. The upper side of the mounting portion 21 is provided with an upper notch 211 that passes through the mounting portion, and the lower side of the mounting portion 21 is provided with a lower notch 212 that passes through the mounting portion. The upper probe rod 12 and the lower probe rod 11 of the micrometer 1 extend from the upper notch 211 and the lower notch 212 respectively. The upper notch 211 is larger than the lower notch 212. The upper and lower notches 211 and 212 can be configured in various shapes, such as a U-shape or a rectangle. The upper and lower notches are primarily configured to allow the upper and lower probe rods to extend from the mounting portion, and also to limit the position of the upper and lower probe rods of the dial gauge 1. The clearance tolerance between the upper probe rod 12 and the upper notch 211, and between the lower probe rod 11 and the lower notch 212, of the dial gauge is controlled to be approximately 0.02mm to 0.05mm, ensuring smooth sliding of the dial gauge 1 when it is installed into or removed from the mounting portion 21.

[0038] In order to facilitate clamping and positioning of the mounting portion 21 during machining, a set of parallel planes 23 are provided on the left and right sides of the outer cylindrical surface of the mounting portion 21 .

[0039] Considering the ease of disassembly of the dial gauge 1 during actual use, the mounting portion 21 and the dial gauge 1 can be fixed by bolts. That is, at least one set of threaded through holes is provided on the side walls of the cavity of the mounting portion 21, and bolts are respectively inserted into the threaded through holes. When the dial gauge 1 is installed in the cavity of the mounting portion 21, the bolts are tightened to secure the dial gauge 1. When the dial gauge 1 needs to be removed, the bolts are loosened.

[0040] The method for using the vertical machining center height difference measuring instrument provided in this embodiment is as follows:

[0041] Before machining, the reference plane P0 is detected and the Z-axis mechanical coordinate value D0 of the position is recorded at the same time;

[0042] In each subsequent measurement of the reference surface height difference ∆P, it is only necessary to detect the mechanical coordinate value D1 of the reference surface P1 to obtain the height difference value, ∆P = D1 - D0.

[0043] The detection mentioned in the above method of using the height difference measuring instrument of the vertical machining center can be achieved through the following actions: After installing the measuring instrument on the spindle, control the movement of the X and Y axes of the machine tool to move it to the top of the reference surface area to be measured, control the Z axis of the machine tool spindle to move it vertically downward, and when the micrometer probe contacts the reference surface, continue to slowly move the spindle downward. The micrometer probe will be compressed and drive the pointer reading to change until the micrometer pointer reading is zero, thereby completing the detection operation.

[0044] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0045] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0046] The present invention is described with reference to certain embodiments. Those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. Furthermore, based on the teachings of this invention, these features and embodiments may be modified to suit specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A height difference measuring instrument for a vertical machining center, including a micrometer, characterized in that: It also includes a mounting component, which includes a mounting portion for mounting the dial indicator and a connecting portion for connecting to a spindle of a vertical machining center, and a lower probe rod of the dial indicator extends out of the mounting portion.

2. The vertical machining center height difference measuring instrument according to claim 1, characterized in that: The connecting portion is rod-shaped and is arranged at the upper end of the mounting portion. The axis of the connecting portion is parallel to the axis of the lower probe rod.

3. The height difference measuring instrument for a vertical machining center according to claim 2, characterized in that: The mounting portion is cylindrical, and a circular cavity concentric with the mounting portion is opened on the front end surface of the mounting portion. The side wall of the cavity of the mounting portion cooperates with the outer cylindrical surface of the micrometer, and the bottom surface of the cavity of the mounting portion fits with the back surface of the micrometer.

4. The height difference measuring instrument for a vertical machining center according to claim 1, 2 or 3, characterized in that: An upper notch passing through the mounting portion is provided on the upper side of the mounting portion, and a lower notch passing through the mounting portion is provided on the lower side of the mounting portion. The upper probe rod and the lower probe rod of the micrometer extend from the upper notch and the lower notch respectively.

5. The height difference measuring instrument for a vertical machining center according to claim 4, characterized in that: A group of mutually parallel planes are provided on the left and right sides of the outer cylindrical surface of the mounting portion.

6. The height difference measuring instrument for a vertical machining center according to claim 4, characterized in that: The mounting portion and the dial indicator are fixed by gluing.

7. The height difference measuring instrument for a vertical machining center according to claim 4, characterized in that: The mounting portion and the micrometer are fixed by screw tightening.

8. The height difference measuring instrument for a vertical machining center according to claim 1, 2, 3, 5, 6 or 7, characterized in that: The connecting portion is a telescopic rod.

9. The height difference measuring instrument for a vertical machining center according to claim 4, characterized in that: The connecting portion is a telescopic rod.

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