Circular saw blade radial circle run-out measuring device

Abstract

The invention discloses a circular saw blade radial circle run-out measuring device, and aims to overcome the defect that the radial circle run-out measurement operation of circular saw blades of different sizes is inconvenient. The device comprises a base and a measuring mechanism, the measuring mechanism comprises a sliding seat and a dial indicator, the sliding seat is slidably mounted on the base to realize coarse position adjustment, the dial indicator is slidably mounted on the sliding seat to realize fine position adjustment, a supporting seat is mounted on the base, and a circular saw blade is loaded on the supporting seat; the circular saw blade rotates, and the dial indicator feeler lever contacts with the edge of the circular saw blade to measure radial circle run-out. Radial circle run-out measurement of saw blades of different sizes is achieved through movement of the dial indicator, the dial indicator firstly coarsely adjusts the moving position and then finely adjusts the moving position, position movement is accurate and reliable, and measurement operation is facilitated.

Description

Technical Field

[0001] This invention relates to the field of saw blade testing technology, and more specifically, to a device for measuring the radial runout of a circular saw blade. Background Technology

[0002] Currently, radial runout measurement is required after saw blade processing to ensure that the finished products meet quality requirements. Existing measurement methods can only inspect saw blades of a single size. When inspecting saw blades of different sizes, different sized fixtures need to be changed, which is inconvenient. Chinese Patent Application No. 2018218270992 discloses a radial runout contact fixture for saw blades. When the measuring rod fixed to the end of the dial indicator's measuring head contacts the saw blade teeth, whose thickness exceeds the diameter of the steel ball in the measuring head, the contact area is larger than that of the steel ball, resulting in more reliable test results. However, when inspecting saw blades of different sizes, the sliding operation of the dial indicator is inconvenient, and the accuracy of the dial indicator's movement is poor. Summary of the Invention

[0003] To overcome the above shortcomings, the present invention provides a radial runout measuring device for circular saw blades. The device measures the radial runout of saw blades of different sizes by moving a dial indicator. The dial indicator is first coarsely adjusted and then finely adjusted. The position movement is accurate and reliable, which facilitates the measurement operation.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a radial runout measuring device for a circular saw blade, comprising a base and a measuring mechanism. The measuring mechanism includes a slide and a dial indicator. The slide is slidably mounted on the base to achieve coarse position adjustment, and the dial indicator is slidably mounted on the slide to achieve fine position adjustment. A support is mounted on the base, and the circular saw blade is loaded on the support. When the circular saw blade rotates, the dial indicator contact rod contacts the edge of the circular saw blade to measure the radial runout.

[0005] When measuring the radial runout of a circular saw blade, first roughly adjust the position of the slide according to the size specifications of the circular saw blade to ensure that the saw blade tip does not contact the dial indicator probe after the blade is loaded onto the support. Then clean the surface of the circular saw blade and load it onto the support. Next, fine-tune the dial indicator until the dial indicator probe touches the tip of the circular saw blade, and continue to fine-tune it to adjust the contact pressure to 0.25mm. Then rotate the circular saw blade, and measure the radial runout by having the dial indicator probe contact the edge of the blade. Read the degree at the highest point of contact between the dial indicator and the blade tip. After one full rotation, record the range of fluctuation of the dial indicator pointer at its highest point.

[0006] The radial runout of saw blades of different sizes can be measured by moving a dial indicator. The dial indicator is first coarsely adjusted and then finely adjusted. The position movement is accurate and reliable, which facilitates the measurement operation.

[0007] Preferably, a guide rail is provided on the base, and the slide is movably inserted into the guide rail. A locking screw is connected to the slide, and the end of the locking screw abuts against the guide rail to lock and position the slide.

[0008] The slide block slides smoothly and reliably along the guide rail. After the slide block slides into place, tighten the locking screw. The end of the locking screw abuts against the guide rail to lock and position the slide block.

[0009] Preferably, two opposing support plates are fastened to the base, and a guide rail is connected between the two support plates.

[0010] The support plate not only enables the installation of the guide rail, but also limits the movement of the slide block, preventing it from slipping off the guide rail.

[0011] Preferably, a guide bar is provided on the slide block, a dial indicator is connected to the slider, a guide groove is provided on the slider, the guide groove is adapted to the guide bar, a rack is provided on the guide bar, a gear is installed on the slider, the gear meshes with the rack for transmission, and the gear is connected to the handle.

[0012] Rotating the handle drives the gear to rotate, and through the cooperation of the gear and rack, the slider moves, thereby enabling fine adjustment of the dial indicator.

[0013] Preferably, the guide groove is a dovetail groove.

[0014] The dovetail groove works in conjunction with the guide bar, ensuring smooth and reliable sliding.

[0015] Preferably, a central shaft is fastened to the support base, and a positioning sleeve is fitted around the central shaft. The positioning sleeve is fitted and positioned with the central hole on the circular saw blade.

[0016] The central axis enables positioning of the circular saw blade's axis. The positioning sleeve fits into the central hole on the circular saw blade, achieving precise positioning of the circular saw blade and ensuring accurate testing.

[0017] Preferably, the lower outer wall of the positioning sleeve gradually narrows towards the lower end to form an inclined guide surface.

[0018] During the insertion and positioning process of the positioning sleeve and the center hole on the circular saw blade, the inclined guide surface plays a good guiding role, which is conducive to the rapid fitting and positioning of the positioning sleeve and the center hole on the circular saw blade.

[0019] Preferably, the positioning sleeve is threadedly connected to the central shaft.

[0020] The positioning sleeve is threaded to the central shaft, making it less likely to detach from the central shaft and facilitating measurement operations.

[0021] Preferably, the positioning sleeve is fitted with a positioning pressure ring, which is connected to a clamping spring and presses against the circular saw blade.

[0022] The clamping spring provides clamping force to the positioning ring, causing the positioning ring to press against the circular saw blade, thus achieving the positioning of the circular saw blade. The circular saw blade rotation measurement process is more stable and reliable.

[0023] Preferably, a slide rod is provided on the support base, and an adjusting seat that moves radially is connected to the slide rod. A lifting and lowering limit rod is installed on the adjusting seat. An inclined pushing surface is provided at the upper end of the limit rod, and a positioning spring is installed between the lower end of the limit rod and the adjusting seat. The limit rod rotates to make the pushing surface face forward or backward.

[0024] The end face of a circular saw blade is typically angled, with the higher edge forming the blade tip. During the rotation measurement process, it's crucial that the lower end of the blade tip passes the contact rod end first, followed by the blade tip. Therefore, the circular saw blade can only rotate in one direction to prevent the blade tip from breaking off due to incorrect rotation. The inclined pushing surface at the upper end of the limiting rod can rotate forward or backward. After the circular saw blade is loaded onto the support, its rotation direction during the testing process can be determined. The pushing surface is then adjusted to face the direction of the circular saw blade's rotation. As the saw blade rotates, the saw teeth at its edge abut against the pushing surface, pushing the limiting rod downwards, allowing the saw blade to rotate smoothly. When the circular saw blade rotates in the opposite direction, the saw teeth at its edge abut against the side wall of the limiting rod, thus limiting the saw teeth and preventing further rotation, thus preventing damage from impact between the blade tip and the contact rod.

[0025] Compared with the prior art, the beneficial effects of the present invention are: (1) The radial runout measuring device of the circular saw blade of the present application realizes the radial runout measurement of saw blades of different sizes by moving the dial indicator. The dial indicator first coarsely adjusts the moving position and then finely adjusts the moving position. The position movement is accurate and reliable, which facilitates the measurement operation; (2) An inclined guide surface is set on the outer wall of the positioning sleeve. During the process of positioning the positioning sleeve and the center hole on the circular saw blade, the guide surface plays a good guiding role, which is conducive to realizing the quick fitting and positioning of the positioning sleeve and the center hole on the circular saw blade; (3) The clamping spring provides clamping force to the positioning pressure ring, so that the positioning pressure ring presses on the circular saw blade to realize the positioning of the circular saw blade, making the circular saw blade rotation measurement process more stable and reliable; (4) During the measurement, the circular saw blade can only rotate in one direction to avoid the error in the rotation direction causing the dial indicator contact rod to collide with the blade tip and damage the blade tip. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention.

[0027] Figure 2 This is a cross-sectional view of Embodiment 1 of the present invention.

[0028] Figure 3 This is a partial cross-sectional view of the support location in Embodiment 2 of the present invention.

[0029] Figure 4 This is a partial cross-sectional view of the support location in Embodiment 3 of the present invention.

[0030] Figure 5 This is a connection structure diagram of the limiting rod in Embodiment 3 of the present invention.

[0031] In the diagram: 1. Base, 2. Slide, 3. Dial indicator, 4. Support base, 5. Contact rod, 6. Guide rail, 7. Locking screw, 8. Sliding sleeve, 9. Support plate, 10. Guide bar, 11. Slider, 12. Guide groove, 13. Rack, 14. Gear, 15. Handle, 16. Base, 17. Connecting seat, 18. Central shaft, 19. Positioning sleeve, 20. Guide surface, 21. Sunken ring groove, 22. Circular saw blade, 23. Positioning pressure ring, 24. Compression spring, 25. Ball bearing, 26. Slide rod, 27. Adjusting seat, 28. Fastening screw, 29. Limiting rod, 30. Pushing surface, 31. Positioning spring, 32. Saw tooth, 33. Insertion hole, 34. Limiting protrusion ring, 35. Limiting slide groove, 36. Limiting protrusion, 37. End cap. Detailed Implementation

[0032] The technical solution of the present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings: Example 1: A device for measuring the radial runout of a circular saw blade (see...) Figure 1 , Figure 2 The system includes a base 1 and a measuring mechanism. The base 1 is a long, strip-shaped plate structure, and the measuring mechanism is mounted on the base 1. The measuring mechanism includes a slide 2 and a dial indicator 3. The slide 2 is slidably mounted on the base 1 to achieve coarse position adjustment, and the dial indicator 3 is slidably mounted on the slide 2 to achieve fine position adjustment. The sliding direction of the slide 2 is parallel to the sliding direction of the dial indicator 3. A support 4 is mounted on the base 1, and the upper end face of the support 4 is horizontally set. The circular saw blade 22 is mounted on the support 4. When the circular saw blade 22 rotates, the contact rod 5 of the dial indicator 3 contacts the edge of the circular saw blade 22 to measure the radial runout.

[0033] A guide rail 6 is mounted on the base 1, with two guide rails 6 arranged in parallel. A slide 2 is movably inserted into and connected to the guide rail 6. A locking screw 7 is connected to the slide 2, with the end of the locking screw 7 abutting against the guide rail 6 to lock and position the slide 2. The slide 2 has a connecting hole corresponding to the guide rail 6, and a sliding sleeve 8 is installed in the connecting hole. The sliding sleeve 8 is fitted to the guide rail 6, and the end of the locking screw passes through the sliding sleeve 8. Two opposing support plates 9 are fastened to the base 1, and the guide rail 6 is connected between the two support plates 9. One end of the locking screw 7 has a flexible abutment that abuts against the guide rail 6. The other end of the locking screw 7 has a knob with raised grooves on its side wall for anti-slip purposes.

[0034] The slide 2 slides smoothly and reliably along the guide rail 6. After the slide 2 slides into position, the locking screw 7 is tightened, and the end of the locking screw 7 abuts against the guide rail 6 to lock and position the slide 2. The end of the locking screw 7 is provided with a flexible abutment, which abuts against the guide rail 6 to prevent scratching the surface of the guide rail 6. The support plate 9 not only enables the installation of the guide rail 6, but also limits the movement of the slide 2, preventing the slide 2 from sliding off the guide rail 6.

[0035] A guide bar 10 is provided on the slide block 2, and the guide bar 10 is arranged parallel to the guide rail 6. The dial indicator 3 is connected to the slider 11, and the slider 11 is provided with a guide groove 12. The guide groove 12 is a dovetail groove and is located on the lower surface of the slider 11. The guide groove 12 is adapted to connect with the guide bar 10. A rack 13 is provided on the guide bar 10, and a gear 14 is installed on the slider 11. The gear 14 meshes with the rack 13 for transmission. The gear 14 is connected to a handle 15, and a rotating shaft is provided on the gear 14. The rotating shaft is rotatably mounted on the slider 11, and both ends of the rotating shaft extend outside the slider 11. A handle 15 is installed at both ends of the rotating shaft. The side wall of the handle 15 is provided with raised texture, which serves as an anti-slip function. A long strip-shaped base 16 is provided at the upper end of the slide block 2, and the guide bar 10 is located on the upper surface of the base 16. A connecting seat 17 is provided on the slider 11, and the dial indicator 3 is fastened to the connecting seat 17. The contact rod 5 of the dial indicator 3 is arranged parallel to the guide rail 6. Rotating the handle 15 causes the gear 14 to rotate. Through the cooperation of the gear 14 and the rack 13, the slider 11 moves, thereby enabling fine adjustment of the dial indicator 3.

[0036] A central shaft 18 is fastened to the support base 4. A positioning sleeve 19 is fitted over the central shaft 18, and the positioning sleeve 19 is fitted into the center hole on the circular saw blade 22 for positioning. The positioning sleeve 19 is threadedly connected to the central shaft 18. The central shaft 18 achieves positioning of the axis of the circular saw blade 22. The positioning sleeve 19 and the center hole on the circular saw blade 22 achieve precise positioning of the circular saw blade 22, ensuring the accuracy of the inspection.

[0037] The lower outer wall of the positioning sleeve 19 gradually tapers towards the lower end to form an inclined guide surface 20. A recessed annular groove 21 is provided on the upper surface of the support base 4, and the lower part of the positioning sleeve 19 is placed in the recessed annular groove 21. During the insertion and positioning process of the positioning sleeve 19 and the center hole on the circular saw blade 22, the inclined guide surface 20 plays a good guiding role, which is conducive to realizing the rapid fitting and positioning of the positioning sleeve 19 and the center hole on the circular saw blade 22.

[0038] When measuring the radial runout of the circular saw blade 22, first roughly adjust the position of the slide 2 according to the size specifications of the circular saw blade 22. During the rough adjustment, slide the slide 2 directly to ensure that the saw blade tip does not contact the dial indicator 3 contact rod 5 after the circular saw blade 22 is loaded onto the support 4. After the rough adjustment is in place, tighten the locking screw 7. Then clean the surface of the circular saw blade 22 and load the circular saw blade 22 onto the support 4. The central shaft 18 on the support 4 is placed in the central hole of the circular saw blade 22. Then connect the positioning sleeve 19 to the central shaft 18. During the connection process, the guide surface 20 on the positioning sleeve 19 contacts the edge of the central hole on the circular saw blade 22. Adjust the position of the circular saw blade 22 so that the central hole and the positioning sleeve 19 fit together properly. At this time, the circular saw blade 22 has completed the center positioning. Then rotate the handle 15 to fine adjust the dial indicator 3 until the dial indicator 3 contact rod 5 touches the tip face of the circular saw blade 22, and continue to fine adjust the percentage until the contact pressure of the contact rod 5 is adjusted to 0.25mm. Then, manually push the circular saw blade 22 to rotate. The dial indicator 3 contact rod 5 contacts the edge of the circular saw blade 22 to measure the radial runout. Read the degree of the highest point of contact between the dial indicator 3 and the blade tip. Rotate it one full circle and record the range of fluctuation of the highest point of the dial indicator 3 pointer.

[0039] The radial runout of saw blades of different sizes can be measured by moving dial indicator 3. The dial indicator 3 is first coarsely adjusted and then finely adjusted. The position movement is accurate and reliable, which facilitates the measurement operation.

[0040] Example 2: A device for measuring the radial runout of a circular saw blade (see...) Figure 3 The system includes a base 1 and a measuring mechanism. The base 1 is a long, strip-shaped plate structure, and the measuring mechanism is mounted on the base 1. The measuring mechanism includes a slide 2 and a dial indicator 3. The slide 2 is slidably mounted on the base 1 to achieve coarse position adjustment, and the dial indicator 3 is slidably mounted on the slide 2 to achieve fine position adjustment. The sliding direction of the slide 2 is parallel to the sliding direction of the dial indicator 3. A support 4 is mounted on the base 1, and the upper end face of the support 4 is horizontally set. The circular saw blade 22 is mounted on the support 4. When the circular saw blade 22 rotates, the contact rod 5 of the dial indicator 3 contacts the edge of the circular saw blade 22 to measure the radial runout.

[0041] A guide rail 6 is mounted on the base 1, with two guide rails 6 arranged in parallel. A slide 2 is movably inserted into and connected to the guide rail 6. A locking screw 7 is connected to the slide 2, with the end of the locking screw 7 abutting against the guide rail 6 to lock and position the slide 2. The slide 2 has a connecting hole corresponding to the guide rail 6, and a sliding sleeve 8 is installed in the connecting hole. The sliding sleeve 8 is fitted to the guide rail 6, and the end of the locking screw passes through the sliding sleeve 8. Two opposing support plates 9 are fastened to the base 1, and the guide rail 6 is connected between the two support plates 9. One end of the locking screw 7 has a flexible abutment that abuts against the guide rail 6. The other end of the locking screw 7 has a knob with raised grooves on its side wall for anti-slip purposes.

[0042] The slide 2 slides smoothly and reliably along the guide rail 6. After the slide 2 slides into position, the locking screw 7 is tightened, and the end of the locking screw 7 abuts against the guide rail 6 to lock and position the slide 2. The end of the locking screw 7 is provided with a flexible abutment, which abuts against the guide rail 6 to prevent scratching the surface of the guide rail 6. The support plate 9 not only enables the installation of the guide rail 6, but also limits the movement of the slide 2, preventing the slide 2 from sliding off the guide rail 6.

[0043] A guide bar 10 is provided on the slide block 2, and the guide bar 10 is arranged parallel to the guide rail 6. The dial indicator 3 is connected to the slider 11, and the slider 11 is provided with a guide groove 12. The guide groove 12 is a dovetail groove and is located on the lower surface of the slider 11. The guide groove 12 is adapted to connect with the guide bar 10. A rack 13 is provided on the guide bar 10, and a gear 14 is installed on the slider 11. The gear 14 meshes with the rack 13 for transmission. The gear 14 is connected to a handle 15, and a rotating shaft is provided on the gear 14. The rotating shaft is rotatably mounted on the slider 11, and both ends of the rotating shaft extend outside the slider 11. A handle 15 is installed at both ends of the rotating shaft. The side wall of the handle 15 is provided with raised texture, which serves as an anti-slip function. A long strip-shaped base 16 is provided at the upper end of the slide block 2, and the guide bar 10 is located on the upper surface of the base 16. A connecting seat 17 is provided on the slider 11, and the dial indicator 3 is fastened to the connecting seat 17. The contact rod 5 of the dial indicator 3 is arranged parallel to the guide rail 6. Rotating the handle 15 causes the gear 14 to rotate. Through the cooperation of the gear 14 and the rack 13, the slider 11 moves, thereby enabling fine adjustment of the dial indicator 3.

[0044] A central shaft 18 is fastened to the support base 4. A positioning sleeve 19 is fitted over the central shaft 18, and the positioning sleeve 19 is fitted into the center hole on the circular saw blade 22 for positioning. The positioning sleeve 19 is threadedly connected to the central shaft 18. The central shaft 18 achieves positioning of the axis of the circular saw blade 22. The positioning sleeve 19 and the center hole on the circular saw blade 22 achieve precise positioning of the circular saw blade 22, ensuring the accuracy of the inspection.

[0045] The lower outer wall of the positioning sleeve 19 gradually tapers towards the lower end to form an inclined guide surface 20. A recessed annular groove 21 is provided on the upper surface of the support base 4, and the lower part of the positioning sleeve 19 is placed in the recessed annular groove 21. During the insertion and positioning process of the positioning sleeve 19 and the center hole on the circular saw blade 22, the inclined guide surface 20 plays a good guiding role, which is conducive to realizing the rapid fitting and positioning of the positioning sleeve 19 and the center hole on the circular saw blade 22.

[0046] The positioning sleeve 19 is fitted with a movable positioning ring 23, which can move up and down. The positioning ring 23 is connected to a clamping spring 24, which provides clamping force to the positioning ring 23, causing it to press against the circular saw blade 22. Several ball bearings 25 are circumferentially spaced on the lower surface of the positioning ring 23, pressing the positioning ring 23 against the circular saw blade 22 through these ball bearings. The friction between the ball bearings 25 and the surface of the circular saw blade 22 is small, ensuring smooth rotation of the circular saw blade 22. The clamping spring 24 provides clamping force to the positioning ring 23, ensuring its pressure on the circular saw blade 22 and thus positioning the circular saw blade 22. This makes the rotation and measurement process of the circular saw blade 22 more stable and reliable.

[0047] When measuring the radial runout of the circular saw blade 22, first roughly adjust the position of the slide block 2 according to the size specifications of the circular saw blade 22. During the rough adjustment, slide the slide block 2 directly to ensure that the saw blade tip does not contact the dial indicator 3 contact rod 5 after the circular saw blade 22 is loaded onto the support base 4. After the rough adjustment is in place, tighten the locking screw 7. Then clean the surface of the circular saw blade 22 and load the circular saw blade 22 onto the support base 4. The central shaft 18 on the support base 4 is placed in the central hole of the circular saw blade 22. Then connect the positioning sleeve 19 to the central shaft 18. During the connection process, the guide surface 20 on the positioning sleeve 19 contacts the edge of the central hole on the circular saw blade 22. Adjust the position of the circular saw blade 22 so that the central hole and the positioning sleeve 19 fit together properly. The ball bearing 25 installed on the lower surface of the positioning ring 23 presses against the upper surface of the circular saw blade 22. At this time, the circular saw blade 22 has completed the center positioning. Then, rotate the handle 15 to fine-tune dial indicator 3 until the dial indicator 3 contact rod 5 touches the tip of the circular saw blade 22. Continue fine-tuning to adjust the contact pressure of the contact rod 5 to 0.25mm. Next, manually rotate the circular saw blade 22, allowing the dial indicator 3 contact rod 5 to contact the edge of the circular saw blade 22 to measure the radial runout. Read the reading at the highest point of contact between the dial indicator 3 and the blade tip. Rotate the dial indicator 3 one full revolution and record the range of fluctuation at the highest point of the dial indicator 3 pointer.

[0048] The radial runout of saw blades of different sizes can be measured by moving dial indicator 3. The dial indicator 3 is first coarsely adjusted and then finely adjusted. The position movement is accurate and reliable, which facilitates the measurement operation.

[0049] Example 3: A device for measuring the radial runout of a circular saw blade (see...) Figure 4 , Figure 5The system includes a base 1 and a measuring mechanism. The base 1 is a long, strip-shaped plate structure, and the measuring mechanism is mounted on the base 1. The measuring mechanism includes a slide 2 and a dial indicator 3. The slide 2 is slidably mounted on the base 1 to achieve coarse position adjustment, and the dial indicator 3 is slidably mounted on the slide 2 to achieve fine position adjustment. The sliding direction of the slide 2 is parallel to the sliding direction of the dial indicator 3. A support 4 is mounted on the base 1, and the upper end face of the support 4 is horizontally set. The circular saw blade 22 is mounted on the support 4. When the circular saw blade 22 rotates, the contact rod 5 of the dial indicator 3 contacts the edge of the circular saw blade 22 to measure the radial runout.

[0050] A guide rail 6 is mounted on the base 1, with two guide rails 6 arranged in parallel. A slide 2 is movably inserted into and connected to the guide rail 6. A locking screw 7 is connected to the slide 2, with the end of the locking screw 7 abutting against the guide rail 6 to lock and position the slide 2. The slide 2 has a connecting hole corresponding to the guide rail 6, and a sliding sleeve 8 is installed in the connecting hole. The sliding sleeve 8 is fitted to the guide rail 6, and the end of the locking screw passes through the sliding sleeve 8. Two opposing support plates 9 are fastened to the base 1, and the guide rail 6 is connected between the two support plates 9. One end of the locking screw 7 has a flexible abutment that abuts against the guide rail 6. The other end of the locking screw 7 has a knob with raised grooves on its side wall for anti-slip purposes.

[0051] The slide 2 slides smoothly and reliably along the guide rail 6. After the slide 2 slides into position, the locking screw 7 is tightened, and the end of the locking screw 7 abuts against the guide rail 6 to lock and position the slide 2. The end of the locking screw 7 is provided with a flexible abutment, which abuts against the guide rail 6 to prevent scratching the surface of the guide rail 6. The support plate 9 not only enables the installation of the guide rail 6, but also limits the movement of the slide 2, preventing the slide 2 from sliding off the guide rail 6.

[0052] A guide bar 10 is provided on the slide block 2, and the guide bar 10 is arranged parallel to the guide rail 6. The dial indicator 3 is connected to the slider 11, and the slider 11 is provided with a guide groove 12. The guide groove 12 is a dovetail groove and is located on the lower surface of the slider 11. The guide groove 12 is adapted to connect with the guide bar 10. A rack 13 is provided on the guide bar 10, and a gear 14 is installed on the slider 11. The gear 14 meshes with the rack 13 for transmission. The gear 14 is connected to a handle 15, and a rotating shaft is provided on the gear 14. The rotating shaft is rotatably mounted on the slider 11, and both ends of the rotating shaft extend outside the slider 11. A handle 15 is installed at both ends of the rotating shaft. The side wall of the handle 15 is provided with raised texture, which serves as an anti-slip function. A long strip-shaped base 16 is provided at the upper end of the slide block 2, and the guide bar 10 is located on the upper surface of the base 16. A connecting seat 17 is provided on the slider 11, and the dial indicator 3 is fastened to the connecting seat 17. The contact rod 5 of the dial indicator 3 is arranged parallel to the guide rail 6. Rotating the handle 15 causes the gear 14 to rotate. Through the cooperation of the gear 14 and the rack 13, the slider 11 moves, thereby enabling fine adjustment of the dial indicator 3.

[0053] A central shaft 18 is fastened to the support base 4. A positioning sleeve 19 is fitted over the central shaft 18, and the positioning sleeve 19 is fitted into the center hole on the circular saw blade 22 for positioning. The positioning sleeve 19 is threadedly connected to the central shaft 18. The central shaft 18 achieves positioning of the axis of the circular saw blade 22. The positioning sleeve 19 and the center hole on the circular saw blade 22 achieve precise positioning of the circular saw blade 22, ensuring the accuracy of the inspection.

[0054] The lower outer wall of the positioning sleeve 19 gradually tapers towards the lower end to form an inclined guide surface 20. A recessed annular groove 21 is provided on the upper surface of the support base 4, and the lower part of the positioning sleeve 19 is placed in the recessed annular groove 21. During the insertion and positioning process of the positioning sleeve 19 and the center hole on the circular saw blade 22, the inclined guide surface 20 plays a good guiding role, which is conducive to realizing the rapid fitting and positioning of the positioning sleeve 19 and the center hole on the circular saw blade 22.

[0055] The positioning sleeve 19 is fitted with a movable positioning ring 23, which can move up and down. The positioning ring 23 is connected to a clamping spring 24, which provides clamping force to the positioning ring 23, causing it to press against the circular saw blade 22. Several ball bearings 25 are circumferentially spaced on the lower surface of the positioning ring 23, pressing the positioning ring 23 against the circular saw blade 22 through these ball bearings. The friction between the ball bearings 25 and the surface of the circular saw blade 22 is small, ensuring smooth rotation of the circular saw blade 22. The clamping spring 24 provides clamping force to the positioning ring 23, ensuring its pressure on the circular saw blade 22 and thus positioning the circular saw blade 22. This makes the rotation and measurement process of the circular saw blade 22 more stable and reliable.

[0056] A slide rod 26 is installed on the support base 4. The slide rod 26 is radially arranged and parallel to the guide rail 6. A radially movable adjusting seat 27 is connected to the slide rod 26. A fastening screw 28 is connected to the adjusting seat 27. After the adjusting seat 27 moves into position, the fastening screw 28 is tightened to position the adjusting seat 27. A lifting and moving limiting rod 29 is installed on the adjusting seat 27. An inclined pushing surface 30 is provided at the upper end of the limiting rod 29. A positioning spring 31 is installed between the lower end of the limiting rod 29 and the adjusting seat 27. The limiting rod 29 rotates to make the pushing surface 30 face forward or backward. The upper end of the limiting rod 29 is positioned between two adjacent saw teeth 32 on the edge of the circular saw blade 22.

[0057] The adjusting seat 27 has a rectangular sliding hole that fits into the sliding rod 26. The adjusting seat 27 also has an insertion hole 33. A limiting protrusion 34 is located on the upper inner wall of the insertion hole 33, and a limiting groove 35 is located on the limiting protrusion 34. Two limiting grooves 35 are evenly distributed circumferentially. The limiting rod 29 has two limiting protrusions 36. The lower part of the limiting rod 29 is installed in the insertion hole 33, and the two limiting protrusions 36 are respectively inserted into the two limiting grooves 35. A positioning spring 31 abuts against the lower end of the limiting rod 29 and the bottom of the insertion hole 33. After the limiting rod 29 moves downwards and the limiting protrusions 36 disengage from the limiting grooves 35, the limiting rod 29 can rotate. The upper end of the adjusting seat 27 is connected to an end cap 37, the upper part of the positioning protrusions rests on the end cap 37, and the limiting rod 29 passes through the end cap 37.

[0058] The end face of the circular saw blade 22 is generally inclined, with the higher edge forming the blade tip. During the rotation measurement process of the circular saw blade 22, it is necessary to ensure that the lower end face of the blade tip passes the end of the contact rod 5 first, followed by the blade tip. Therefore, the circular saw blade 22 can only rotate in one direction to avoid the blade tip breaking due to incorrect rotation direction. The inclined pushing surface 30 at the upper end of the limiting rod 29 can be rotated to face forward or backward. After the circular saw blade 22 is loaded onto the support base 4, the rotation direction of its detection process can be determined. At this time, the orientation of the pushing surface 30 is adjusted according to the determined rotation direction. First, the limiting rod 29 is pressed down to disengage the limiting protrusion 36 from the limiting groove 35. Then, the limiting rod 29 is rotated so that the pushing surface 30 faces the rotation direction of the circular saw blade 22. When the circular saw blade 22 rotates, the saw teeth 32 at the edge abut against the pushing surface 30, thereby pushing the limiting rod 29 downward, allowing the circular saw blade 22 to rotate smoothly. When the circular saw blade 22 rotates in the wrong direction, the saw teeth 32 on the edge abut against the side wall of the limiting rod 29. At this time, the limiting rod 29 limits the saw teeth 32, and the circular saw blade 22 can no longer rotate, preventing the blade tip from colliding and being damaged by the contact rod 5.

[0059] When measuring the radial runout of the circular saw blade 22, first roughly adjust the position of the slide block 2 according to the size specifications of the circular saw blade 22. During the rough adjustment, slide the slide block 2 directly to ensure that the saw blade tip does not contact the dial indicator 3 contact rod 5 after the circular saw blade 22 is loaded onto the support base 4. After the rough adjustment is in place, tighten the locking screw 7. Then clean the surface of the circular saw blade 22 and load the circular saw blade 22 onto the support base 4. The central shaft 18 on the support base 4 is placed in the central hole of the circular saw blade 22. Then connect the positioning sleeve 19 to the central shaft 18. During the connection process, the guide surface 20 on the positioning sleeve 19 contacts the edge of the central hole on the circular saw blade 22. Adjust the position of the circular saw blade 22 so that the central hole and the positioning sleeve 19 fit together properly. The ball bearing 25 installed on the lower surface of the positioning ring 23 presses against the upper surface of the circular saw blade 22. At this time, the circular saw blade 22 has completed the center positioning. After the circular saw blade 22 is loaded onto the support base 4, its rotation direction during the testing process can be determined. At this point, adjust the orientation of the pushing surface 30 according to the determined rotation direction. First, press down on the limiting rod 29 to disengage the limiting protrusion 36 from the limiting groove 35, then rotate the limiting rod 29 so that the pushing surface 30 faces the rotation direction of the circular saw blade 22. Then, rotate the handle 15 to fine-tune the dial indicator 3 until the dial indicator 3's contact rod 5 touches the tip of the circular saw blade 22, and continue fine-tuning to adjust the contact pressure of the contact rod 5 to 0.25mm. Afterward, manually push the circular saw blade 22 to rotate, and the dial indicator 3's contact rod 5 contacts the edge of the circular saw blade 22 to measure the radial runout. Read the degree at the highest point of contact between the dial indicator 3 and the blade tip. Rotate one revolution and record the range of fluctuation at the highest point of the dial indicator 3's pointer.

[0060] The radial runout of saw blades of different sizes can be measured by moving dial indicator 3. The dial indicator 3 is first coarsely adjusted and then finely adjusted. The position movement is accurate and reliable, which facilitates the measurement operation.

[0061] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Other variations and modifications may be made without departing from the technical solutions described in the claims.

Claims

1. A device for measuring the radial runout of a circular saw blade, characterized in that, It includes a base and a measuring mechanism. The measuring mechanism includes a slide and a dial indicator. The slide is slidably mounted on the base to achieve coarse position adjustment, and the dial indicator is slidably mounted on the slide to achieve fine position adjustment. A support is mounted on the base, and the circular saw blade is loaded on the support. When the circular saw blade rotates, the dial indicator contact rod contacts the edge of the circular saw blade to measure the radial runout.

2. The radial runout measuring device for a circular saw blade according to claim 1, characterized in that, A guide rail is installed on the base, and the slide is movably inserted into the guide rail. A locking screw is connected to the slide, and the end of the locking screw abuts against the guide rail to lock and position the slide.

3. The radial runout measuring device for a circular saw blade according to claim 2, characterized in that, Two opposing support plates are fastened to the base, and a guide rail is connected between the two support plates.

4. The radial runout measuring device for a circular saw blade according to claim 1, characterized in that the slide... A guide bar is set on the top, a dial indicator is connected to the slider, a guide groove is set on the slider, the guide groove is adapted to the guide bar, a rack is set on the guide bar, a gear is installed on the slider, the gear and the rack mesh to drive, and the gear is connected to the handle.

5. The radial runout measuring device for a circular saw blade according to claim 4, characterized in that, The guide groove is a dovetail groove.

6. The radial runout measuring device for a circular saw blade according to claim 1, characterized in that, A central shaft is fastened to the support base, and a positioning sleeve is fitted onto the central shaft. The positioning sleeve is fitted into the center hole on the circular saw blade for positioning.

7. The radial runout measuring device for a circular saw blade according to claim 6, characterized in that, The lower outer wall of the positioning sleeve gradually tapers towards the lower end to form an inclined guide surface.

8. A radial runout measuring device for a circular saw blade according to claim 6, characterized in that, The positioning sleeve is threadedly connected to the central shaft.

9. A radial runout measuring device for a circular saw blade according to claim 6, characterized in that, The positioning sleeve has an external movable fitting of a positioning pressure ring, which is connected to a clamping spring and presses against the circular saw blade.

10. A radial runout measuring device for a circular saw blade according to any one of claims 1 to 9, characterized in that, A slide rod is installed on the support base, and an adjusting seat that moves radially is connected to the slide rod. A lifting and lowering limit rod is installed on the adjusting seat. An inclined pushing surface is provided at the upper end of the limit rod, and a positioning spring is installed between the lower end of the limit rod and the adjusting seat. The limit rod rotates to make the pushing surface face forward or backward.

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