A height measuring device for electrode blank before finishing

Abstract

The application relates to a height measuring device for electrode blank before finish machining, which comprises a base, the front end of the base is provided with a support, the support is provided with a pneumatic chuck, the pneumatic chuck is provided with a clamp, the clamp is provided with a sliding groove for positioning an electrode blank and extending transversely, the rear end of the base is provided with a vertical guide rail, the vertical guide rail is provided with a first sliding table which can be adjusted, the front end of the first sliding table is provided with a longitudinal beam which extends longitudinally above the support, the longitudinal beam is provided with a laser range finder, and the two sides of the support are provided with centralizers for clamping the two sides of the electrode blank. The utility model belongs to the technical field of numerical control machine tool auxiliary equipment, and through the double positioning mechanism of initial positioning of the sliding groove and accurate positioning of the centralizer, in combination with non-contact laser ranging, the accuracy and repeatability of height measurement data are ensured.

Description

Technical Field

[0001] This application relates to the field of auxiliary equipment technology for CNC machine tools, and in particular to a height measuring device for electrode blanks before finishing. Background Technology

[0002] Before electrode blanks enter the CNC machine tool for finishing, their actual height often deviates from the theoretical value due to casting or pre-machining errors. Directly machining according to a preset program may result in insufficient (with allowance) or excessive (damaging the workpiece or even the tool) milling depth, leading to workpiece scrap and production interruption. Currently, the common practice is to manually measure using a coordinate measuring machine (CMM) outside the machine, but this method is inefficient, cumbersome to set up, and prone to human error, making it difficult to integrate into automated production lines. Therefore, there is an urgent need for a dedicated measuring device that can be integrated before the CNC machining process, quickly, automatically, and accurately measure the height of the electrode blank, and directly feed the data back to the CNC machine tool. Utility Model Content

[0003] Therefore, it is necessary to provide a height measuring device for electrode blanks before finishing, and the specific technical solution is as follows.

[0004] A height measuring device for electrode blanks before finishing includes a base, a support at the front end of the base, a pneumatic chuck on the support, a clamp on the pneumatic chuck, a sliding groove extending laterally on the clamp for positioning the electrode blank, a vertical guide rail at the rear end of the base, an adjustable first slide on the vertical guide rail, a longitudinal beam extending longitudinally to the top of the support at the front end of the first slide, a laser rangefinder on the longitudinal beam, and centering devices for clamping the two sides of the electrode blank on both sides of the support.

[0005] Furthermore, the clamp has a block structure, and a mandrel protrudes from the bottom end of the clamp. The pneumatic chuck has a positioning hole at its center that matches the mandrel.

[0006] Furthermore, the bottom end of the electrode blank is provided with a slider structure that matches the groove on the fixture.

[0007] Furthermore, the front end of the clamp is provided with a countersunk hole communicating with the slide groove, and a clamping screw is threaded into the countersunk hole.

[0008] Furthermore, the inner end of the clamp is provided with an identification element, and a second slide is provided on the vertical guide rail, with an RFID reader / writer capable of sensing the identification element on the second slide.

[0009] Furthermore, the centering device includes two bearing seats, a vertically arranged rotating shaft on the two bearing seats, pulleys on the two rotating shafts, and a transmission belt connecting the two pulleys. Two symmetrically arranged clamping seats are provided on the belt on both sides of the transmission belt. The top of the two clamping seats is provided with a push rod corresponding to the two sides of the electrode blank. An electric push rod connected to the bottom end of one of the clamping seats is provided on the base.

[0010] Furthermore, the base is provided with transversely arranged transverse guide rails, and the rear ends of the two clamping seats are provided with transverse slides that are slidably connected to the transverse guide rails.

[0011] Furthermore, the support frame is a gantry structure, the conveyor belt passes under the gantry structure, and the electric push rod is located under the gantry structure.

[0012] Furthermore, the base is provided with an outer cover covering the bottom of the centering device, and the outer cover is provided with an operation button.

[0013] Compared with existing technologies, this utility model has the following beneficial effects: (1) The height measuring device of this utility model for finishing electrode blanks, through the dual positioning mechanism of initial positioning of the slide groove and fine positioning of the centering device, combined with non-contact laser ranging, ensures the accuracy and repeatability of height measurement data; (2) The height measuring device of this utility model for electrode blank before finishing has a smooth process from clamping and centering to measurement, and can realize automatic feedback of measurement data and adaptive adjustment of CNC program, which greatly reduces manual intervention. (3) The height measuring device of this utility model for electrode blanks before finishing can quickly adapt to different types of electrode blanks through replaceable fixtures and RFID identification system, so as to realize flexible production and intelligent management. (4) The height measuring device of this utility model for electrode blank before finishing has a reasonable structural layout and protective cover design, which protects the internal precision mechanism and ensures the safety of the operator. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional structural view of the height measuring device for electrode blanks before finishing; Figure 2 This is a front view of the structure of the height measuring device for electrode blanks before finishing; Figure 3 This is a side view of the structure of the height measuring device for electrode blanks before finishing; Figure 4 This is a three-dimensional view of the height measuring device for electrode blanks before finishing, after removing the fixture. Figure 5 This is a three-dimensional view of the height measuring device for electrode blanks before finishing, after adding an outer cover. Figure 6 This is an enlarged schematic diagram of the fixture structure in this utility model.

[0016] Explanation of reference numerals in the attached figures: 1. Base; 2. Bracket; 3. Pneumatic chuck; 4. Fixture; 5. Electrode blank; 6. Slide groove; 7. Vertical guide rail; 8. First slide table; 9. Longitudinal beam; 10. Laser rangefinder; 11. Centerer; 12. Mandrel; 13. Positioning hole; 14. Slider structure; 15. Countersunk hole; 16. Clamping screw; 17. Identifier; 18. RFID reader / writer; 19. Bearing seat; 20. Rotating shaft; 21. Pulley; 22. Conveyor belt; 23. Clamping seat; 24. Top rod; 25. Electric push rod; 26. Transverse guide rail; 27. Transverse slide table; 28. Second slide table; 29. ​​Outer cover; 30. Operation button. Detailed Implementation

[0017] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0018] The embodiments of this utility model will be described below based on its overall structure.

[0019] Reference Figures 1-6As shown, this embodiment provides a height measuring device for electrode blanks before finishing, including a base 1, a support 2 at the front end of the base 1, a pneumatic chuck 3 on the support 2, a clamp 4 on the pneumatic chuck 3, a groove 6 extending laterally on the clamp 4 for positioning the electrode blank 5, a vertical guide rail 7 at the rear end of the base 1, a first slide 8 adjustable on the vertical guide rail 7, a longitudinal beam 9 extending longitudinally to the top of the support 2 at the front end of the first slide 8, a laser rangefinder 10 on the longitudinal beam 9, and centering devices 11 on both sides of the support 2 for clamping the electrode blank 5. The CNC machine tool can adjust the tool path and milling height according to the height data of the electrode blank 5 measured by the laser rangefinder 10.

[0020] The height measuring device of this utility model for electrode blanks before finishing is initially positioned by the groove 6 of the fixture 4, then precisely positioned by the centering device 11, and finally non-contactly measured by the laser rangefinder 10, and the data is fed back to the CNC machine tool. The initial longitudinal positioning is achieved using the slide groove 6, followed by precise lateral alignment using the centering devices 11 on both sides, ensuring that the axis of the electrode blank 5 is consistent with the measurement and subsequent machining references. Utilizing laser triangulation or time-of-flight ranging principles, a laser rangefinder 10 emits a laser beam towards the top of the electrode blank 5 and receives the reflected light, accurately calculating the distance between it and the rangefinder, thus determining the absolute height of the blank. This solves the problem of inconsistent heights of the electrode blank caused by casting or pre-machining errors, preventing workpiece scrap due to insufficient or excessive allowance during CNC machining. It achieves integrated data flow between measurement and machining, improving the level of automation and intelligence in machining. It fundamentally avoids machining defects caused by blank height errors. Online measurement eliminates the time spent on repeated clamping and measurement on external coordinate measuring machines and other equipment. It enables automatic acquisition and feedback of measurement data, reducing manual intervention and human error.

[0021] Specifically, the clamp 4 has a block structure, with a mandrel 12 protruding from its bottom end. The pneumatic chuck 3 has a positioning hole 13 at its center that matches the mandrel 12. In this embodiment, the clamp 4 has a block structure and is installed by the mandrel 12 at its bottom engaging with the positioning hole 13 at the center of the pneumatic chuck 3. The high-precision engagement between the mandrel and the positioning hole enables rapid and accurate radial positioning of the clamp 4 on the pneumatic chuck 3. When replacing or installing the clamp, simply insert the mandrel 12 into the positioning hole 13, and then the pneumatic chuck 3 clamps the clamp body. This allows for rapid clamp replacement and precise positioning, ensuring the repeatability and accuracy of the clamp installation. It also improves the versatility and ease of maintenance of the equipment and ensures the stability of the measurement reference.

[0022] Specifically, the bottom end of the electrode blank 5 is provided with a slider structure 14 that matches the sliding groove 6 on the clamp 4. In this embodiment, the bottom end of the electrode blank 5 is provided with a slider structure 14 that matches the sliding groove 6. The slider and the sliding groove are used to guide and initially position the electrode blank. During clamping, the slider 14 slides in along the sliding groove 6. This enables the electrode blank to be installed quickly and accurately, and provides a basis for subsequent centering and clamping. It simplifies the operation and improves clamping efficiency and consistency.

[0023] Specifically, the front end of the fixture 4 is provided with a countersunk hole 15 communicating with the slide groove 6, and a clamping screw 16 is internally threaded into the countersunk hole 15. In this embodiment, a countersunk hole 15 and a clamping screw 16 are provided at the front end of the fixture 4, communicating with the slide groove 6; by tightening the clamping screw 16, its end abuts against the slider structure 14, generating friction to fix it. After the electrode blank is centered and positioned by the centering device 11, the clamping screw 16 is tightened to prevent it from moving during the measurement process. After centering is completed, the electrode blank is fixed longitudinally to prevent it from loosening; this increases the stability and reliability of the measurement, and the structure is simple and easy to operate.

[0024] Specifically, the inner end of the fixture 4 is provided with an identification element 17, and the vertical guide rail 7 is provided with a second slide 28. The second slide 28 is provided with an RFID reader / writer 18 capable of sensing the identification element 17, and the identification element 17 has an RFID tag. In this embodiment, the identification information of the fixture is read non-contactly using RFID technology. After the fixture is installed, the height of the second slide 28 is adjusted so that the RFID reader / writer 18 is aligned with the identification element 17 at the inner end of the fixture 4 to read the fixture ID. This achieves intelligent management of the fixture, prevents the use of incorrect measurement programs, realizes flexible production, and improves the automation level of the equipment and the precision of production management.

[0025] Specifically, the centering device 11 includes two bearing seats 19, a vertically arranged rotating shaft 20 mounted on the two bearing seats 19, pulleys 21 mounted on the two rotating shafts 20, and a transmission belt 22 connecting the two pulleys 21. Two symmetrically arranged clamping seats 23 are provided on both sides of the transmission belt 22. The tops of the two clamping seats 23 are provided with push rods 24 corresponding to the two sides of the electrode blank 5. An electric push rod 25 connected to the bottom end of one of the clamping seats 23 is provided on the base 1. In this embodiment, the centering device 11 consists of bearing seats 19, rotating shafts 20, pulleys 21, transmission belt 22, clamping seats 23, push rods 24, and electric push rod 25. The electric push rod 25 drives one clamping seat 23, and through synchronous belt transmission, causes the two clamping seats 23 to move synchronously towards or away from each other. Utilizing the principle of synchronous belt drive, the linear motion of the electric push rod 25 is converted into the synchronous and symmetrical linear motion of the two clamping seats 23. The electric push rod 25 extends, pushing one clamping seat 23 to move, which drives the other clamping seat 23 to move synchronously in the opposite direction through the transmission belt 22, thereby enabling the two push rods 24 to accurately clamp the electrode blank 5 from both sides. A forced centering mechanism is provided to ensure that the axis of the electrode blank is always positioned on the same center line. The centering accuracy is high, the action synchronization is good, and the repeatability of the measurement is guaranteed.

[0026] Specifically, the base 1 is provided with a transversely arranged transverse guide rail 26, and the rear ends of the two clamping seats 23 are provided with transverse slides 27 that are slidably connected to the transverse guide rail 26. In this embodiment, the transverse guide rail 26 is provided on the base 1, and the rear ends of the clamping seats 23 cooperate with the guide rail through the transverse slides 27; the guide rail slider pair provides precise guidance and support for the movement of the clamping seats 23; the clamping seats 23 slide smoothly along the transverse guide rail 26 through the transverse slides 27 under the drive of the electric push rod; this improves the rigidity and stability of the centering device during movement, eliminates shaking, ensures centering accuracy, extends the service life of the equipment, and further guarantees the accuracy stability of long-term use.

[0027] Specifically, the support 2 is a gantry structure, the conveyor belt 22 passes through the bottom of the gantry structure, and the electric push rod 25 is located below the gantry structure, which optimizes the structural strength, makes reasonable use of space, and makes the overall layout compact.

[0028] The base is provided with an outer cover 29 covering the bottom of the centering device 11, and the outer cover 29 is provided with an operation button 30; the outer cover 29 protects the internal precision mechanism from dust and chips, and at the same time prevents accidental contact by personnel, ensuring safety.

[0029] The specific work process is as follows: The work process is as follows: (1) Preparation and identification: The operator installs the clamp 4 of the matching electrode blank 5 model onto the pneumatic chuck 3 through the mandrel 12 and clamps it; the second slide 28 moves to make the RFID reader 18 read the information of the identification piece 17, and the control system automatically confirms and loads the corresponding measurement parameters. (2) Clamping and initial positioning: The operator pushes the slider 14 at the bottom of the electrode blank 5 into place along the groove 6 of the clamp 4; (3) Automatic centering: Press the operation button 30, start the electric push rod 25, push one clamping seat 23 to move, and through the transmission belt 22, make the two clamping seats 23 drive the top rod 24 to move synchronously towards each other, and precisely clamp the electrode blank 5 from both sides, so that its center coincides with the predetermined reference center; then, the clamping screw 16 can be tightened.

[0030] (4) Height measurement: The control system drives the first slide 8 to adjust the laser rangefinder 10 to a suitable height; the laser rangefinder 10 emits a laser to the top surface of the electrode blank 5 and measures it to obtain height data; (5) Data feedback and processing: The measured height data is sent to the control system of the CNC machine tool in real time through a communication interface (such as Ethernet, RS232, etc.); the CNC system automatically corrects the origin of the Z-axis coordinate system and the milling depth in the machining program based on this actual height value. (6) Reset: After the measurement is completed, the centering device 11 is released, and the operator can remove the electrode blank 5 whose height has been measured and transfer it to the CNC machine tool for processing.

[0031] The above embodiments only illustrate one or more implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A height measuring device for electrode blanks before finishing, comprising a base (1), a support (2) provided at the front end of the base (1), and a pneumatic chuck (3) provided on the support (2), characterized in that, The pneumatic chuck (3) is provided with a clamp (4), and the clamp (4) is provided with a groove (6) for positioning the electrode blank (5) extending laterally. The rear end of the base (1) is provided with a vertical guide rail (7), and the vertical guide rail (7) is provided with an adjustable first slide (8). The front end of the first slide (8) is provided with a longitudinal beam (9) extending longitudinally to the top of the bracket (2). The longitudinal beam (9) is provided with a laser rangefinder (10). The bracket (2) is provided with centering devices (11) on both sides for clamping the electrode blank (5).

2. The height measuring device for electrode blanks before finishing according to claim 1, characterized in that, The clamp (4) has a block structure, and a spindle (12) protrudes from the bottom end of the clamp (4). The pneumatic chuck (3) has a positioning hole (13) at the center that is compatible with the spindle (12).

3. The height measuring device for electrode blanks before finishing according to claim 1, characterized in that, The bottom end of the electrode blank (5) is provided with a slider structure (14) that is adapted to the groove (6) on the fixture (4).

4. The height measuring device for electrode blanks before finishing according to claim 3, characterized in that, The front end of the clamp (4) is provided with a countersunk hole (15) communicating with the slide (6), and a clamping screw (16) is threaded into the countersunk hole (15).

5. A height measuring device for electrode blanks before finishing, as described in claim 3, characterized in that, The clamp (4) has an identification element (17) at its inner end, and a second slide (28) is provided on the vertical guide rail (7). An RFID reader (18) capable of sensing the identification element (17) is provided on the second slide (28).

6. A height measuring device for electrode blanks before finishing according to any one of claims 1-5, characterized in that, The centering device (11) includes two bearing seats (19), a vertically arranged rotating shaft (20) on the two bearing seats (19), a pulley (21) on the two rotating shafts (20) and a transmission belt (22) connecting the two pulleys (21). Two symmetrically arranged clamping seats (23) are provided on the belt on both sides of the transmission belt (22). The top of the two clamping seats (23) is provided with a push rod (24) corresponding to the two sides of the electrode blank (5). The base (1) is provided with an electric push rod (25) connected to the bottom end of one of the clamping seats (23).

7. A height measuring device for electrode blanks before finishing, as described in claim 6, characterized in that, The base (1) is provided with a transverse guide rail (26) arranged in a transverse direction, and the rear ends of the two clamping seats (23) are provided with a transverse slide (27) that is slidably connected to the transverse guide rail (26).

8. A height measuring device for electrode blanks before finishing, as described in claim 6, characterized in that, The support (2) is a gantry structure, the conveyor belt (22) passes through the bottom of the gantry structure, and the electric push rod (25) is located below the gantry structure.

9. A height measuring device for electrode blanks before finishing, as described in claim 6, characterized in that, The base is provided with an outer cover (29) covering the bottom of the centering device (11), and the outer cover (29) is provided with an operation button (30).

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