A position detection mechanism

Abstract

This application relates to a position detection mechanism, belonging to the field of tool grinding technology. The position detection mechanism includes a mounting base, a mounting cylinder, a probe, and a contact sensor. The mounting cylinder is disposed on the mounting base, and the probe is movably disposed within the mounting cylinder. The probe is used to abut against the end face of the milling cutter and to position the groove on the end face of the milling cutter. The contact sensor is disposed on the mounting base and located on the side of the probe away from the milling cutter. The probe is used to abut against the contact sensor. When the probe is disengaged from the milling cutter, the probe is disengaged from the contact sensor. This application has the effect of quickly determining the length of the milling cutter extending from the tool clamping mechanism, providing convenience for confirming the milling cutter feed distance.

Description

Technical Field

[0001] This application relates to the field of tool grinding technology, and in particular to a position detection mechanism. Background Technology

[0002] Currently, after milling cutters and other cutting tools wear out, companies usually use sharpening machines to grind the tools for reuse in order to save production costs.

[0003] Reference Figure 1 In related technologies, a milling cutter mainly includes a shank 13 and a cutter body 14. The cylindrical surface of the cutter body 14 is provided with an outer peripheral cutting edge 15, and the end of the cutter body 14 is provided with multiple bottom cutting edges 16, with a groove 17 between adjacent bottom cutting edges 16. A grinding machine mainly includes a grinding mechanism, a tool clamping mechanism, a lifting mechanism, a translation mechanism, and a control mechanism. The grinding mechanism has a disc grinding wheel and a double-sided convex grinding wheel. The disc grinding wheel is used to grind the bottom cutting edges 16 on the end face of the milling cutter, and the double-sided convex grinding wheel is used to grind the grooves 17 on the end face of the milling cutter. The tool clamping mechanism is used to clamp and fix the tool shank 13. The lifting mechanism is used to drive the grinding mechanism to move up and down, and the translation mechanism is used to drive the tool clamping mechanism to move along the X-axis or Y-axis. During operation, the tool to be ground is clamped onto the tool clamping mechanism. The control mechanism drives the translation mechanism to work, which in turn drives the tool clamping mechanism to move the tool closer to the grinding mechanism for grinding.

[0004] Regarding the aforementioned technologies, since the tool clamping mechanism generally uses a spring collet, when the milling cutter shank is inserted into the spring collet for locking, the operator often finds it difficult to judge the length of the tool body extending out. The specific length of the tool body extending out is crucial for determining the feed distance for milling. Utility Model Content

[0005] To facilitate the rapid determination of the length of the milling cutter extending from the tool clamping mechanism and to provide convenience for confirming the feed distance of the milling cutter, this application provides a position detection mechanism.

[0006] The position detection mechanism provided in this application adopts the following technical solution: A position detection mechanism, comprising: Mounting base; The mounting cylinder is mounted on the mounting base; The probe is movably mounted inside the mounting cylinder and is used to abut against the end face of the milling cutter and to position the groove on the end face of the milling cutter. A contact sensor is mounted on a mounting base and located on the side of the probe away from the milling cutter. The probe is used to contact the contact sensor. When the probe is detached from the milling cutter, the probe is detached from the contact sensor.

[0007] Preferably, the probe includes a limiting body and a positioning probe. The limiting body is movably disposed on the mounting cylinder and is used to abut against the end face of the milling cutter and the contact sensor. The positioning probe is disposed vertically at the lower end of the limiting body and is used to abut against the outer circumferential wall of the end face of the milling cutter.

[0008] Preferably, the limiting body is slidably disposed in the mounting cylinder in a horizontal direction, and the direction of movement of the limiting body is parallel to the arrangement direction of the tool clamping mechanism and the contact sensor. The mounting cylinder is provided with an elastic element for pushing the limiting body to move away from the contact sensor.

[0009] Preferably, the elastic element includes a spring for pushing the limiting body to move away from the contact sensor. One end of the spring is disposed on the mounting cylinder and the other end is disposed on the limiting body. When the spring is in its natural state, the limiting body is disengaged from the contact sensor.

[0010] Preferably, the limiting body has contact planes on opposite sides, with the contact plane away from the contact sensor for contacting the end of the milling cutter, and the contact plane closer to the contact sensor for contacting the contact sensor.

[0011] Preferably, the mounting cylinder is equipped with a detection light, which is used for electrical connection with an external control platform. The detection light is turned on when the probe comes into contact with the contact sensor.

[0012] Preferably, the position detection mechanism further includes an air cylinder and a contact rod. The air cylinder is mounted on a mounting base and has a nozzle connected to it. The nozzle is aligned with the probe. A piston is slidably mounted inside the air cylinder and is used to pressurize gas into the nozzle. A pusher is provided inside the air cylinder to drive the piston to return to its original position. The contact rod is mounted on a tool clamping mechanism and is used to abut against the piston as it moves toward the point where the air cylinder and the nozzle communicate.

[0013] Preferably, the pushing member includes a push spring for driving the piston to return to its original position, one end of the push spring being disposed inside the air cylinder and the other end being disposed on the piston.

[0014] In summary, this application includes the following beneficial technical effects: After the milling cutter is clamped onto the tool holding mechanism of the grinding machine, the lifting mechanism of the grinding machine drives the mounting base and the grinding mechanism to move synchronously, so that the probe is aligned with the milling cutter on the tool holding mechanism. Then, the translation mechanism drives the tool holding mechanism to move the milling cutter closer to the probe until the end of the milling cutter abuts the probe, so that the probe abuts the contact sensor. At this time, the contact sensor sends an abutment signal to the external control platform. Based on the position of the tool holding mechanism on the X-axis at this time and the preset program, the length of the milling cutter extension is calculated. Thus, the feed distance of the tool holding mechanism during milling can be calculated and determined based on the length of the milling cutter extension. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a milling cutter in related technologies.

[0016] Figure 2 This is a schematic diagram of the overall structure of an embodiment of this application.

[0017] Figure 3 This is a partial structural cross-sectional view of an embodiment of this application.

[0018] Explanation of reference numerals in the attached drawings: 1. Mounting base; 2. Mounting cylinder; 3. Probe; 31. Limiting body; 32. Positioning probe; 4. Contact sensor; 5. Spring; 6. Contact plane; 7. Detection light; 8. Air cylinder; 9. Abutment rod; 10. Air nozzle; 11. Piston; 12. Push spring; 13. Handle; 14. Blade body; 15. Outer peripheral blade; 16. Bottom blade; 17. Groove; 18. Guide rod. Detailed Implementation

[0019] The following combination Figures 1-3 This application will be described in further detail.

[0020] This application discloses a position detection mechanism. (Refer to...) Figure 1 and Figure 2 The position detection mechanism includes a mounting base 1, a mounting cylinder 2, a probe 3, and a contact sensor 4. The mounting base 1 is connected to the grinding mechanism of the grinding machine. Specifically, the mounting base 1 is fixed to the lifting seat in the grinding mechanism and is located above the disc grinding wheel and the double-sided convex grinding wheel, so that the mounting base 1 can move up and down with the grinding mechanism. The mounting cylinder 2 is fixedly mounted on the mounting base 1 in the vertical direction. The probe 3 is movably mounted inside the mounting cylinder 2. The probe 3 is used to abut against the end face of the milling cutter and to position the groove 17 on the end face of the milling cutter. The contact sensor 4 is mounted on the mounting base 1 and is located on the side of the probe 3 away from the milling cutter. The probe 3 is used to abut against the contact sensor 4. When the probe 3 is detached from the milling cutter, the probe 3 is detached from the contact sensor 4.

[0021] Reference Figure 1 and Figure 2Furthermore, to facilitate the detection of contact between the end of the milling cutter and the probe 3, the contact sensor 4 adopts a proximity switch, which is wirelessly connected to the external control platform.

[0022] After the milling cutter is clamped onto the tool holding mechanism of the grinding machine, the lifting mechanism of the grinding machine drives the mounting base 1 to move synchronously with the grinding mechanism, so that the probe 3 is aligned with the milling cutter on the tool holding mechanism. Then, the translation mechanism drives the tool holding mechanism to move the milling cutter closer to the probe 3 until the end of the milling cutter abuts against the probe 3, so that the probe 3 abuts against the contact sensor 4. At this time, the contact sensor 4 sends an abutment signal to the external control platform. Based on the position of the tool holding mechanism on the X-axis at this time and the preset program, the length of the milling cutter extension is calculated. Thus, the feed distance of the tool holding mechanism during milling can be calculated and determined based on the length of the milling cutter extension. This application, through the cooperation of the probe 3 and the contact sensor 4, helps to quickly determine the length of the milling cutter extension, providing convenience for confirming the feed distance of the milling cutter during grinding.

[0023] Next, the milling cutter is moved away from the probe 3 by the translation mechanism, and then the grinding mechanism is moved to the required height by the lifting mechanism. Then, the translation mechanism moves the end face of the milling cutter closer to the disc grinding wheel, and the bottom edge 16 of the end face of the milling cutter is ground in combination with the milling cutter feed distance obtained above.

[0024] After the end face bottom edge 16 of the milling cutter is ground, the lifting mechanism of the grinding machine drives the mounting base 1 to move synchronously with the grinding mechanism, so that the probe 3 is aligned with the milling cutter on the tool clamping mechanism. Then, the translation mechanism drives the tool clamping mechanism to move the milling cutter closer to the probe 3. Then, the milling cutter on the tool clamping mechanism is slowly rotated. When the tool clamping motor that drives the tool to rotate receives a small resistance signal, the external control platform sends a command to stop the tool clamping motor from rotating, so that the groove 17 on the end face of the milling cutter is rotated to the vertical direction. Then, the milling cutter is moved away from the probe 3. Then, the lifting mechanism moves the grinding mechanism to the required height. The translation mechanism moves the end face of the milling cutter closer to the double-sided convex grinding wheel to grind the end face groove 17.

[0025] Reference Figure 1 and Figure 3 To facilitate contact with the end face of the milling cutter and to position the end face groove 17 of the milling cutter, the probe 3 includes a limiting body 31 and a positioning probe 32. The limiting body 31 is movably disposed inside the mounting cylinder 2. The limiting body 31 is cylindrical. The opposite sides of the limiting body 31 are used to contact the end face of the milling cutter and the contact sensor 4, respectively. To improve the contact effect, the opposite sides of the limiting body 31 have contact planes 6. The contact plane 6 away from the contact sensor 4 is used to contact the end of the milling cutter, and the contact plane 6 close to the contact sensor 4 is used to contact the contact sensor 4.

[0026] Reference Figure 1 and Figure 3The positioning probe 32 is integrally formed on the lower end of the limiting body 31 in the vertical direction. The diameter of the positioning probe 32 decreases in the direction away from the limiting body 31. The positioning probe 32 is used to abut against the circumferential outer wall of the end face of the milling cutter. The minimum outer diameter of the positioning probe 32 is less than the width of the slot 17.

[0027] The design of two contact planes 6 facilitates the contact between the contact sensor 4 and the end of the milling cutter, ensuring detection accuracy. The positioning probe 32 abuts against the outer wall of the end face of the milling cutter. When the tool holder motor that drives the tool to rotate receives a small resistance signal through the slow rotation of the milling cutter, it proves that the positioning probe 32 is aligned with the groove 17 on the end face of the milling cutter. At this time, the groove 17 on the end face of the milling cutter is in the vertical direction, which facilitates the cooperation between the groove 17 on the end face of the milling cutter and the double-sided convex grinding wheel.

[0028] Reference Figure 1 and Figure 3 The limiting body 31 is slidably disposed in the mounting cylinder 2 in the horizontal direction. The direction of movement of the limiting body 31 is parallel to the arrangement direction of the tool clamping mechanism and the contact sensor 4. The sliding direction of the limiting body 31 is perpendicular to the rotation axis of the grinding wheel in the grinding mechanism. In order to improve the sliding effect of the limiting body 31, a guide rod 18 is fixed in the mounting cylinder 2. The upper end of the limiting body 31 is slidably sleeved on the guide rod 18. An elastic element is provided in the mounting cylinder 2 for pushing the limiting body 31 to move away from the contact sensor 4.

[0029] Reference Figure 1 and Figure 3 To facilitate the movement of the limiting body 31 away from the contact sensor 4, the elastic element includes a spring 5. The extension direction of the spring 5 is parallel to the sliding direction of the limiting body 31. One end of the spring 5 is fixedly mounted on the mounting cylinder 2, and the other end is fixedly mounted on the limiting body 31. When the spring 5 is in its natural state, the limiting body 31 is disengaged from the contact sensor 4.

[0030] When the milling cutter is disengaged from the limiting body 31, the spring 5 is in its natural state, and the limiting body 31 is disengaged from the contact sensor 4. When the milling cutter moves toward the limiting body 31, the end of the milling cutter gradually comes into contact with the contact plane 6 of the limiting body 31, and then pushes the contact plane 6 on the other side of the limiting body 31 to come into contact with the contact sensor 4, causing the spring 5 to deform. When the positioning detection is completed, the milling cutter moves away from the limiting body 31 and disengages from the limiting body 31. Then, under the elastic force of the spring 5, the limiting body 31 is driven away from the contact sensor 4 and disengages from the contact sensor 4.

[0031] Reference Figure 3In other embodiments, the limiting body 31 can also be hinged in the mounting cylinder 2 by a torsion spring, with the hinge axis of the limiting body 31 parallel to the rotation axis of the grinding wheel in the grinding mechanism. Alternatively, it can be ball-jointed in the mounting cylinder 2. Whether it is hinged or ball-jointed, the limiting body 31 can be moved by the milling cutter and contact the sensor 4.

[0032] Reference Figure 3 An inspection light 7 is installed on the mounting cylinder 2. The inspection light 7 is electrically connected to the external control platform. When the probe 3 comes into contact with the contact sensor 4, the inspection light 7 illuminates. The design of the inspection light 7 helps operators to know in a timely manner that the tool extension length detection is complete.

[0033] Reference Figure 2 and Figure 3 To ensure the accuracy of the detection, the position detection mechanism also includes an air cylinder 8 and a contact rod 9. There are two air cylinders 8, which are fixedly mounted on the mounting base 1. The mounting cylinder 2 is located between the two air cylinders 8. The length direction of the air cylinder 8 is parallel to the sliding direction of the limiting body 31. Each air cylinder 8 is connected to a jet nozzle 10 through a fixed hard tube. The jet nozzle 10 is aligned with the probe 3. A piston 11 is slidably mounted in each air cylinder 8. The piston 11 is used to press gas into the jet nozzle 10. A pusher is provided in the air cylinder 8 to drive the piston 11 to reset. The contact rod 9 is fixed on the tool clamping mechanism. The contact rod 9 corresponds to each air cylinder 8. A through hole (not shown in the figure) is opened on the side of the air cylinder 8 away from the mounting base 1. The contact rod 9 is used to pass through the through hole on the corresponding air cylinder 8 and abut against the piston 11 to move towards the connection between the air cylinder 8 and the fixed hard tube. When the milling cutter on the tool clamping mechanism is aligned with the contact plane 6 on the limiting body 31, the contact rod 9 is aligned with the through hole on the corresponding air cylinder 8.

[0034] Reference Figure 2 and Figure 3 To facilitate the repositioning of the piston 11 by moving it away from the connection between the air cylinder 8 and the fixed rigid tube, the pushing component includes a push spring 12. Each push spring 12 corresponds to one of the air cylinders 8, and is located on the side of the corresponding piston 11 away from the abutment rod 9. One end of the push spring 12 is fixedly installed inside the air cylinder 8, and the other end is fixedly installed on the piston 11. Furthermore, when the milling cutter abuts against the disc grinding wheel or double-sided convex grinding wheel of the grinding mechanism, the abutment rod 9 will not interfere with the grinding mechanism.

[0035] When the milling cutter on the tool clamping mechanism moves toward the contact plane 6 on the limiting body 31 and toward the mounting cylinder 2, the abutment rod 9 extends into the corresponding air cylinder 8 to abut the piston 11. As the tool clamping mechanism continues to approach, the abutment rod 9 pushes the piston 11 to press the gas into the corresponding air nozzle 10, causing the air nozzle 10 to spray the gas toward the contact plane 6 of the limiting body 31. This helps to blow off the debris adhering to the contact plane 6, thereby reducing the impact on the detection of the milling cutter extension length. When the detection is completed, the tool clamping mechanism moves the milling cutter away from the mounting cylinder 2, reducing the pressure of the abutment rod 9 on the piston 11. The piston 11 gradually returns to its original position under the action of the corresponding push spring 12, making it convenient for the next use.

[0036] The implementation principle of this application embodiment is as follows: After the milling cutter is clamped onto the tool holding mechanism of the grinding machine, the lifting mechanism of the grinding machine drives the mounting base 1 to move synchronously with the grinding mechanism, so that the probe 3 is aligned with the milling cutter on the tool holding mechanism. Then, the translation mechanism drives the tool holding mechanism to move the milling cutter close to the contact plane 6 of the limiting body 31. Then, the abutment rod 9 gradually pushes the corresponding piston 11 to move. The piston 11 presses gas into the air nozzle 10, so that the air nozzle 10 blows air toward the limiting body 31 to blow off the adhering impurities until the end of the milling cutter abuts the limiting body 31 and pushes the limiting body 31 to abut the contact sensor 4. At this time, the contact sensor 4 sends an abutment signal to the external control platform, and the external control platform drives the detection light 7 to light up. Based on the position of the tool holding mechanism on the X-axis at this time and the preset program, the length of the milling cutter extension can be calculated. Based on the length of the milling cutter extension, the feed distance of the tool holding mechanism during milling can be calculated and determined. This application, through the cooperation of probe 3 and contact sensor 4, helps to quickly determine the length of the milling cutter extension, providing convenience for confirming the feed distance of the milling cutter.

[0037] Next, the translation mechanism drives the tool clamping mechanism to move the milling cutter away from the limiting body 31. The limiting body 31 is reset under the elastic action of the spring 5, and the piston 11 is reset under the elastic action of the push spring 12. Then, the grinding mechanism is moved to the required height through the lifting mechanism. According to the calculated feed distance, the translation mechanism drives the end face of the milling cutter to approach the disc grinding wheel for grinding the end face bottom edge 16.

[0038] After the end face bottom edge 16 of the milling cutter is ground, the milling cutter is driven away from the disc grinding wheel by the translation mechanism. Then, the lifting mechanism of the grinding machine drives the mounting base 1 and the grinding mechanism to move synchronously, so that the limiting body 31 and the milling cutter on the tool clamping mechanism are on the same horizontal line. Then, the translation mechanism drives the tool clamping mechanism to move the milling cutter so that the milling cutter is aligned with the contact plane 6 of the limiting body 31. Then, the milling cutter is driven to approach the positioning probe 32 so that the positioning probe 32 abuts against the circumferential outer wall of the milling cutter. Then, the milling cutter on the tool clamping mechanism is driven to rotate slowly. When the tool clamping motor that drives the tool to rotate receives a small resistance signal, the external control platform sends a command to stop the tool clamping motor from rotating, so that the groove 17 on the end face of the milling cutter is rotated to the vertical direction. Then, the translation mechanism moves the milling cutter away from the positioning probe 32. Then, the lifting mechanism moves the grinding mechanism to the required height. The translation mechanism moves the end face of the milling cutter close to the double-sided convex grinding wheel to grind the end face groove 17.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A position detection mechanism, characterized in that, include: Mounting base (1); The mounting cylinder (2) is mounted on the mounting base (1); The probe (3) is movably disposed inside the mounting cylinder (2) and is used to abut against the end face of the milling cutter and to position the end face groove (17) of the milling cutter. A contact sensor (4) is mounted on a mounting base (1) and located on the side of the probe (3) away from the milling cutter. The probe (3) is used to contact the contact sensor (4). When the probe (3) is detached from the milling cutter, the probe (3) is detached from the contact sensor (4).

2. The position detection mechanism according to claim 1, characterized in that: The probe (3) includes a limiting body (31) and a positioning probe (32). The limiting body (31) is movably mounted on the mounting cylinder (2). The limiting body (31) is used to abut against the end face of the milling cutter and the contact sensor (4). The positioning probe (32) is arranged vertically at the lower end of the limiting body (31). The positioning probe (32) is used to abut against the outer circumferential wall of the end face of the milling cutter.

3. The position detection mechanism according to claim 2, characterized in that: The limiting body (31) is slidably disposed in the mounting cylinder (2) in the horizontal direction. The direction of movement of the limiting body (31) is parallel to the arrangement direction of the tool clamping mechanism and the contact sensor (4). The mounting cylinder (2) is provided with an elastic element for pushing the limiting body (31) to move away from the contact sensor (4).

4. A position detection mechanism according to claim 3, characterized in that: The elastic element includes a spring (5) for pushing the limiting body (31) to move away from the contact sensor (4). One end of the spring (5) is disposed on the mounting cylinder (2), and the other end is disposed on the limiting body (31). When the spring (5) is in its natural state, the limiting body (31) is disengaged from the contact sensor (4).

5. A position detection mechanism according to claim 2, characterized in that: The limiting body (31) has contact planes (6) on opposite sides. The contact plane (6) away from the contact sensor (4) is used to abut against the end of the milling cutter, and the contact plane (6) close to the contact sensor (4) is used to abut against the contact sensor (4).

6. A position detection mechanism according to claim 1, characterized in that: The mounting cylinder (2) is equipped with a detection lamp (7), which is used to be electrically connected to an external control platform. When the probe (3) comes into contact with the contact sensor (4), the detection lamp (7) is turned on.

7. A position detection mechanism according to any one of claims 1-6, characterized in that: The position detection mechanism also includes an air cylinder (8) and a contact rod (9). The air cylinder (8) is mounted on the mounting base (1). An air nozzle (10) is connected to the air cylinder (8). The air nozzle (10) is aligned with the probe (3). A piston (11) is slidably disposed inside the air cylinder (8). The piston (11) is used to press gas into the air nozzle (10). A pusher is disposed inside the air cylinder (8) to drive the piston (11) to reset. The contact rod (9) is disposed on the tool clamping mechanism. The contact rod (9) is used to abut against the piston (11) as it moves toward the point where the air cylinder (8) and the air nozzle (10) communicate.

8. A position detection mechanism according to claim 7, characterized in that: The pusher includes a push spring (12) for driving the piston (11) to reset, one end of the push spring (12) being disposed inside the air cylinder (8) and the other end being disposed on the piston (11).

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