Low precision system self-measuring tool positioning structure

Abstract

The utility model belongs to mechanical manufacturing technical field discloses a kind of low-precision system self-measurement tool positioning structure, wherein, including: magnetic grid sensor is set on machine tool reference surface, and constitutes position measurement reference system;At least two tool holders are connected on tool rest screw rod, and tool rest screw rod is installed on tool rest by bearing, and tool rest screw rod is driven by tool rest motor installed on tool rest;Photoelectric switch is fixed in the reference position of crossbeam one;The utility model passes through photoelectric switch as marker sensor, when tool holder passes, trigger signal, realize the identification to tool holder position.When needing precision adjustment tool distance, first, tool holder is moved to limit position, then, through crossbeam movement, let tool holder contact photoelectric switch in turn, record the position of magnetic grid sensor, then, through tool rest motor, tool rest screw rod is rotated again, until corresponding photoelectric sensor trigger signal, complete accurate position adjustment of tool holder.

Description

Technical Field

[0001] This utility model relates to the field of mechanical manufacturing technology, and in particular to a low-precision system self-measuring tool positioning structure. Background Technology

[0002] In the field of machine tool processing, the accuracy and stability of tool positioning are crucial to machining quality. However, existing tool positioning structures have some shortcomings: For some tool positioning structures, the measurement accuracy is difficult to guarantee within a large stroke range, resulting in large tool position deviations, affecting machining accuracy, and making it impossible to achieve accurate tool positioning, thus affecting production efficiency. Utility Model Content

[0003] The main purpose of this utility model is to provide a low-precision system self-measuring tool positioning structure, which aims to solve the technical problem that some tool positioning structures have difficulty in guaranteeing measurement accuracy within a large stroke range, resulting in large tool position deviations, affecting machining accuracy, and failing to achieve accurate tool positioning, thus affecting production efficiency.

[0004] To achieve the aforementioned objectives of this utility model, the first aspect of this utility model proposes a low-precision system self-measuring tool positioning structure, comprising: The magnetic grating sensor is set on the reference surface of the machine tool to form a position measurement reference system; At least two tool holders are connected to a tool post lead screw, and the tool post lead screw is mounted on the tool post via bearings. The tool post lead screw is driven by a tool post motor mounted on the tool post. The photoelectric switch is fixed at the reference position of the crossbeam.

[0005] Furthermore, the magnetic grating sensor and the photoelectric switch constitute a composite measurement system, wherein the magnetic grating sensor maintains an accuracy of ±0.02mm when the measurement stroke is greater than 500mm, and the photoelectric switch has a response time of less than 1ms.

[0006] Furthermore, the photoelectric switch adopts an infrared laser through-beam structure, with its transmitting and receiving ends respectively set at both ends of the crossbeam to form a light curtain detection area, achieving a detection resolution of 0.01mm.

[0007] Furthermore, the tool holder motor uses four sets of micro stepper motors, and the four sets of micro stepper motors are located on both sides of the tool holder.

[0008] Furthermore, a photoelectric switch is used as a marking sensor, which triggers a signal when the tool holder passes by, thereby marking the position of the tool holder.

[0009] Furthermore, the structure also includes a backup photoelectric switch, which is mounted on the second crossbeam to improve the reliability and stability of the system.

[0010] Furthermore, the first and second crossbeams respectively support the movement of the tool holder and participate in the precise adjustment of the tool position.

[0011] Furthermore, the tool holder is equipped with a quick-change interface, compatible with various tool specifications from ISO30 to ISO50.

[0012] Furthermore, when precise adjustment of the tool spacing is required, the tool holder is first moved to its limit position, and then the crossbeam is moved to allow the tool holder to contact the photoelectric switches in sequence, recording the position of the magnetic grating sensor.

[0013] Furthermore, the tool holder motor drives the tool holder screw to rotate again until the corresponding photoelectric sensor triggers a signal, thus completing the precise position adjustment of the tool holder.

[0014] Beneficial effects: This invention relates to a low-precision self-measuring tool positioning structure. It utilizes photoelectric switches as marker sensors, triggering a signal when the tool holder passes by to mark its position. When precise tool spacing adjustment is required, the tool holder is first moved to its limit position. Then, the crossbeam moves, causing the tool holder to sequentially contact the photoelectric switches, recording the position of the magnetic grating sensor. The tool holder motor then rotates the tool holder screw again until the corresponding photoelectric sensor triggers a signal, completing the precise adjustment of the tool holder's position. This precision adjustment mechanism further improves the accuracy of tool positioning.

[0015] The structure of this utility model also includes a backup photoelectric switch, which is mounted on the second crossbeam. When the main photoelectric switch malfunctions or detects an abnormality, the backup photoelectric switch can promptly take over the operation, ensuring the normal operation of the system, improving the system's reliability and stability, and reducing processing interruptions caused by sensor failures. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a low-precision system self-measuring tool positioning structure according to an embodiment of the present invention.

[0017] in: 1. Magnetic grid sensor; 2. Cutting tool; 3. Photoelectric switch; 4. Backup photoelectric switch; 5. Crossbeam one; 6. Crossbeam two; 7. Tool holder motor; 8. Tool holder lead screw; 9. Tool holder.

[0018] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly and specifically defined.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] Reference Figure 1 An embodiment of this utility model provides a low-precision system self-measuring tool positioning structure, comprising: The magnetic grating sensor 1 is mounted on the machine tool reference surface to form a position measurement reference system; At least two tool holders 9 are connected to the tool post screw 8, and the tool post screw 8 is mounted on the tool post via bearings. The tool post screw 8 is driven by the tool post motor 7 mounted on the tool post. The photoelectric switch 3 is fixed at the reference position of the crossbeam 5.

[0024] In this embodiment, the magnetic grating sensor 1 is mounted on the machine tool reference surface, forming a position measurement reference system. Its accuracy remains ±0.02mm when the measurement stroke is greater than 500mm. In actual installation, the magnetic grating sensor 1 is firmly fixed to the machine tool reference surface using a dedicated mounting bracket, ensuring its relative position to the machine tool remains stable. The magnetic grating sensor 1 internally includes a magnetic grating scale and a reading head. The magnetic grating scale is engraved with periodically changing magnetized stripes. When the tool holder screw 8 moves the tool holder 9, the reading head senses the change in the magnetized stripes on the magnetic grating scale, converts it into an electrical signal, and thus accurately measures the position of the tool holder 9.

[0025] The lead screw 8, serving as a transmission component, is mounted on the tool post at both ends via high-precision bearings, ensuring its stability and straightness during rotation. Four sets of miniature stepper motors are evenly distributed on both sides of the tool post and connected to the lead screw 8 via couplings. When the tool post motor 7 receives a control signal, the stepper motor rotates according to a preset pulse signal, driving the lead screw 8 to rotate. This causes the tool holder 9, connected to the lead screw 8, to move along the lead screw axis, thereby adjusting the position of the tool 2.

[0026] The photoelectric switch 3 is fixed at the reference position of the crossbeam 5. It adopts an infrared laser through-beam structure, with its transmitting end and receiving end set at both ends of the crossbeam to form a light curtain detection area, and the detection resolution reaches 0.01mm.

[0027] The transmitter and receiver of photoelectric switch 3 are mounted on both ends of crossbeam 5 using a precise positioning device to ensure accurate and stable positioning of the light curtain detection area. When the tool holder 9 passes through the light curtain detection area, it blocks the infrared laser. The receiver of photoelectric switch 3 detects the change in light intensity, thereby triggering a signal to mark the position of tool holder 9. Due to the use of an infrared laser through-beam structure, it has high detection accuracy and response speed, with a response time of less than 1ms, enabling rapid and accurate detection of the position information of tool holder 9.

[0028] Optionally, the magnetic grating sensor 1 and the photoelectric switch 3 constitute a composite measurement system. The magnetic grating sensor 1 maintains an accuracy of ±0.02mm when its measurement stroke exceeds 500mm, and the photoelectric switch 3 has a response time of less than 1ms. The photoelectric switch 3 adopts an infrared laser through-beam structure, with its transmitting and receiving ends respectively positioned at both ends of the crossbeam to form a light curtain detection area, achieving a detection resolution of 0.01mm. The photoelectric switch 3 is used as a marking sensor; when the tool holder 9 passes by, a trigger signal is generated to mark the position of the tool holder 9.

[0029] The tool holder motor 7 uses four sets of micro stepper motors, and the four sets of micro stepper motors are located on both sides of the tool holder.

[0030] The structure also includes a backup photoelectric switch 4, which is mounted on the second crossbeam 6 to improve the reliability and stability of the system.

[0031] It should be noted that the installation position and method of the backup photoelectric switch 4 are similar to those of the photoelectric switch 3, and it is connected to the control system through an independent circuit. During normal operation, the backup photoelectric switch 4 is in standby mode. When the photoelectric switch 3 malfunctions or detects an abnormality, the backup photoelectric switch 4 can take over the operation in a timely manner to ensure the normal operation of the system, thereby improving the reliability and stability of the entire tool positioning structure.

[0032] The first crossbeam 5 and the second crossbeam 6 respectively support the movement of the tool holder 9 and participate in the precise adjustment of the position of the tool 2.

[0033] The tool holder 9 is equipped with a quick-change interface, compatible with various tool specifications from ISO30 to ISO50 2.

[0034] It should be noted that the quick-change interface design allows the tool holder 9 to quickly change to different specifications of tools 2, improving machining efficiency. In practical applications, the operator only needs to insert the tool 2 into the quick-change interface of the tool holder 9 and then fix the tool 2 in place using the locking device. No complicated installation and adjustment process is required, making it convenient and quick.

[0035] When precise adjustment of the tool spacing is required, first move the tool holder 9 to its limit position, then move the crossbeam to allow the tool holder 9 to contact the photoelectric switch 3 in sequence, recording the position of the magnetic grating sensor 1. The tool holder motor 7 then drives the tool holder screw 8 to rotate again until the corresponding photoelectric sensor triggers a signal, completing the precise position adjustment of the tool holder 9.

[0036] It should be noted that crossbeams 5 and 6, as supporting structures for the movement of the tool holder 9, possess sufficient strength and rigidity to ensure the stability and straightness of the tool holder 9 during movement. During the precise adjustment of the tool 2 position, crossbeams 5 and 6 work in conjunction with sensors such as the magnetic grating sensor 1 and the photoelectric switch 3 to measure and control the position of the tool holder 9, thereby achieving precise adjustment of the tool 2 position.

[0037] Explanation: When it is necessary to identify the position of the tool holder 9, a photoelectric switch 3 is used as a marking sensor. When the tool holder 9 passes through, a signal is triggered, thus identifying the position of the tool holder 9. Specifically, the tool post motor 7 drives the tool post lead screw 8 to move the tool holder 9. When the tool holder 9 enters the light curtain detection area of ​​the photoelectric switch 3, the photoelectric switch 3 detects the signal and transmits it to the control system. The control system records the position information of the tool holder 9 measured by the magnetic grating sensor 1 at this time, thereby identifying the position of the tool holder 9.

[0038] When precise adjustment of the tool spacing is required, the tool holder 9 is first moved to its limit position. Then, the crossbeam is moved so that the tool holder 9 sequentially contacts the photoelectric switch 3, recording the position of the magnetic grating sensor 1. First, the tool post motor 7 drives the tool post lead screw 8 to move the tool holder 9 to the set limit position. Then, by controlling the movement of crossbeams 5 and 6, the tool holder 9 sequentially passes the photoelectric switch 3. Each time the tool holder 9 triggers the photoelectric switch 3, the control system records the position information measured by the magnetic grating sensor 1. Through multiple triggers and recordings, information about the tool holder 9 at different positions can be obtained, providing data support for subsequent precision adjustments.

[0039] The tool holder motor 7 drives the tool holder screw 8 to rotate again until the corresponding photoelectric sensor triggers a signal, completing the precise position adjustment of the tool holder 9. After obtaining sufficient position data through precise adjustment of the tool spacing, the control system calculates the target position of each tool holder 9 according to the preset tool spacing requirements. Then, the tool holder motor 7 drives the tool holder screw 8 to rotate according to the instructions of the control system, causing the tool holder 9 to move towards the target position. During the movement, the photoelectric switch 3 detects the position of the tool holder 9 in real time. When the tool holder 9 triggers the photoelectric switch 3 again, the control system adjusts the speed and direction of the tool holder motor 7 according to the position information fed back by the magnetic grating sensor 1 until the tool holder 9 accurately reaches the target position, completing the precise position adjustment of the tool holder 9.

[0040] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the contents of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A low-precision system self-measuring tool positioning structure, characterized in that, include: A magnetic grating sensor (1) is set on the reference surface of the machine tool to form a position measurement reference system; At least two tool holders (9) are connected to the tool post screw (8), and the tool post screw (8) is mounted on the tool post by bearings. The tool post screw (8) is driven by the tool post motor (7) mounted on the tool post. The photoelectric switch (3) is fixed at the reference position of the crossbeam (5).

2. The low-precision system self-measuring tool positioning structure according to claim 1, characterized in that, The magnetic grating sensor (1) and the photoelectric switch (3) constitute a composite measurement system. The magnetic grating sensor (1) maintains an accuracy of ±0.02mm when the measurement stroke is greater than 500mm, and the photoelectric switch (3) has a response time of less than 1ms.

3. The low-precision system self-measuring tool positioning structure according to claim 2, characterized in that, The photoelectric switch (3) adopts an infrared laser through-beam structure, with its transmitting end and receiving end respectively set at both ends of the crossbeam to form a light curtain detection area, and the detection resolution reaches 0.01mm.

4. The low-precision system self-measuring tool positioning structure according to claim 1, characterized in that, The tool holder motor (7) uses four sets of micro stepper motors, and the four sets of micro stepper motors are located on both sides of the tool holder.

5. The low-precision system self-measuring tool positioning structure according to claim 1, characterized in that, A photoelectric switch (3) is used as a marking sensor. When the tool holder (9) passes by, a signal is triggered to mark the position of the tool holder (9).

6. The low-precision system self-measuring tool positioning structure according to claim 1, characterized in that, The structure also includes a backup photoelectric switch (4), which is mounted on the second beam (6) to improve the reliability and stability of the system.

7. The low-precision system self-measuring tool positioning structure according to claim 1, characterized in that, The first crossbeam (5) and the second crossbeam (6) respectively support the movement of the tool holder (9) and participate in the precise adjustment of the tool (2) position.

8. The low-precision system self-measuring tool positioning structure according to claim 1, characterized in that, The tool holder (9) is equipped with a quick-change interface, compatible with the specifications of various tools (2) from ISO30 to ISO50.

9. The low-precision system self-measuring tool positioning structure according to claim 1, characterized in that, When precise adjustment of the tool distance is required, first move the tool holder (9) to the limit position, and then move the crossbeam to make the tool holder (9) contact the photoelectric switch (3) in sequence to record the position of the magnetic grating sensor (1).

10. The low-precision system self-measuring tool positioning structure according to claim 9, characterized in that, The tool holder motor (7) drives the tool holder screw (8) to rotate again until the corresponding photoelectric sensor triggers the signal, thus completing the precise position adjustment of the tool holder (9).

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