A polishing cloth tension adjusting device for a quick-release polishing and grinding machine for steel reinforcement metallographic sample preparation

Abstract

The utility model relates to the technical field of steel bar metallographic sample preparation, disclose a kind of for steel bar metallographic sample preparation quick-release type polishing cloth tensioning adjusting device of polishing machine, including driving shaft and fixed at its bottom end's polishing disc, further including the adjusting assembly being set around driving shaft and polishing disc;Adjusting assembly includes the butt joint disc located at the outside of polishing disc, the opening for polishing disc embedding is opened in butt joint disc middle part, and the disc body of butt joint disc is opened with annular clamping groove outside the outside of opening. Through setting the butt joint disc of adjusting assembly and elastic ring mutual cooperation, it can be fixed in annular clamping groove by the elastic contraction force of elastic ring when polishing cloth laying through the edge compaction of it, realize the quick tensioning fixation of polishing cloth, effectively avoid the problem of loose wrinkle caused by traditional direct setting mode.

Description

Technical Field

[0001] This utility model relates to the field of metallographic sample preparation technology for reinforcing bars, and in particular to a quick-release polishing cloth tension adjustment device for metallographic sample preparation of reinforcing bars. Background Technology

[0002] Metallographic sample preparation refers to the process of cutting, mounting, grinding, and polishing metal samples in order to observe the internal structure of metals (such as grain size, phase composition, defects, etc.) under a microscope. The final result is a smooth, scratch-free observation surface, like a mirror. In the final polishing stage, a soft polishing cloth is placed on the rotating disk to polish and remove the fine scratches on the sample surface, thus achieving a mirror effect.

[0003] In traditional metallographic polishing machines for reinforcing steel samples, the polishing cloth is typically directly fitted onto the polishing disc. Over time, this can lead to loosening and wrinkling, resulting in uneven stress on the sample during polishing and affecting the surface quality and accuracy of the metallographic sample. Furthermore, when changing polishing cloths of different mesh sizes or materials, the disassembly and installation procedures of traditional devices are cumbersome and time-consuming, reducing sample preparation efficiency. To address the problems of inconvenient polishing cloth tension adjustment and time-consuming replacement in existing technologies, we provide a quick-release polishing cloth tension adjustment device for metallographic polishing machines for reinforcing steel samples. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a quick-release polishing cloth tension adjustment device for metallographic sample preparation of reinforcing bars, aiming to improve the problems of inconvenient adjustment and time-consuming replacement of polishing cloth tension in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a quick-release polishing cloth tension adjustment device for metallographic sample preparation of reinforcing bars, comprising a drive shaft and a polishing disc fixed at its bottom end, and further comprising an adjustment assembly arranged around the drive shaft and the polishing disc; the adjustment assembly includes a docking disc located outside the polishing disc, the docking disc having an opening in the middle for the polishing disc to be inserted, and the docking disc having an annular groove around the outer side of the opening, a polishing cloth being laid between the polishing disc and the docking disc, and the edge of the polishing cloth extending into the annular groove, an elastic ring matching its size being fitted inside the annular groove, and the polishing cloth being pressed and fixed in the annular groove by the elastic ring.

[0006] As a further description of the above technical solution: The elastic rings are multiple and are arranged at equal intervals on the outside of the pressure ring. The pressure ring is installed above the docking plate by a lifting drive assembly. The lifting drive assembly is used to drive the pressure ring to move closer to or away from the docking plate so that the multiple elastic rings can be simultaneously engaged or disengaged from the annular groove.

[0007] As a further description of the above technical solution: The lifting drive mechanism includes sleeves symmetrically arranged at both ends of the pressure ring. A sleeve rod is threaded into the sleeve. A servo motor is provided at the top end of the sleeve rod to drive its rotation. A mounting bracket is provided at one end of the servo motor, and a mounting clamp is provided at one end of the mounting bracket. The mounting clamp is fastened to the outside of the drive shaft.

[0008] As a further description of the above technical solution: The two ends of the docking plate are fixedly provided with fixing seats, the bottom of the sleeve is installed on the top of the fixing seats, and the fixing seats are fixedly connected to the docking plate.

[0009] As a further description of the above technical solution: The top of the pressure ring is symmetrically provided with support rods, and the upper end of the support rods is connected to the mounting frame.

[0010] As a further description of the above technical solution: The number of elastic rings and annular slots are both three, and the elastic rings are made of elastic, non-slip rubber.

[0011] In summary, due to the adoption of the above technical solution, the beneficial effects of this application are as follows: In this invention, by setting the mating plate and the elastic ring in the adjustment component to cooperate with each other, the edge of the polishing cloth can be pressed and fixed in the annular groove by the elastic contraction force of the elastic ring when the polishing cloth is laid, so as to realize the rapid tensioning and fixing of the polishing cloth and effectively avoid the loosening and wrinkling problems caused by the traditional direct sleeve method.

[0012] In this invention, by using a lifting drive assembly to lift the docking plate, multiple elastic rings can be simultaneously disengaged from the annular slot. At this time, the operator only needs to remove the edge of the polishing cloth from the slot to complete the disassembly. After replacing the new polishing cloth, the lifting assembly is driven in reverse to make the elastic rings re-engage. The entire replacement process does not require additional tools, which significantly shortens the replacement time of the polishing cloth and improves the overall efficiency of metallographic sample preparation of steel bars. Attached Figure Description

[0013] Figure 1 A perspective view of the adjustment components, drive shaft, and polishing disc connection structure of a quick-release grinding and polishing machine for metallographic sample preparation of reinforcing bars, as proposed in this utility model. Figure 2 This utility model provides a perspective view of the connection structure of the adjustment component of a quick-release polishing cloth tension adjustment device for metallographic sample preparation of reinforcing bars. Figure 3 A cross-sectional view of the pressure ring and the connecting plate of a quick-release polishing cloth tension adjustment device for metallographic sample preparation of reinforcing bars, as proposed in this utility model. Figure 4 This is a top view of the docking plate of a quick-release polishing cloth tension adjustment device for metallographic sample preparation of reinforcing bars, as proposed in this utility model. Figure 5 This utility model provides a cross-sectional view of the polishing disc, polishing cloth, annular groove, and elastic ring connection of a quick-release polishing cloth tension adjustment device for metallographic sample preparation of reinforcing bars.

[0014] Legend: 1. Drive shaft; 2. Polishing disc; 3. Adjustment assembly; 31. Connecting disc; 311. Annular groove; 312. Fixing seat; 32. Elastic ring; 33. Pressure ring; 331. Support rod; 34. Sleeve; 35. Sleeve rod; 36. Servo motor; 37. Mounting bracket; 38. Mounting hoop; 4. Polishing cloth. Detailed Implementation

[0015] Example 1 This embodiment provides a specific implementation of a quick-release polishing cloth tension adjustment device for metallographic sample preparation of reinforcing bars.

[0016] like Figure 1 As shown, the device mainly includes a drive shaft 1, a polishing disc 2, and an adjustment assembly 3. The polishing disc 2 is fixedly mounted on the bottom end of the drive shaft 1 via a conventional mechanical connection (such as a threaded connection or a flange connection). The adjustment assembly 3 is arranged around the drive shaft 1 and the polishing disc 2.

[0017] The core of adjustment component 3 is the docking plate 31. For example... Figures 1-5 As shown, the docking disc 31 is an annular disc with a circular opening in its center. The diameter of the opening is slightly larger than the diameter of the polishing disc 2, allowing the polishing disc 2 to be embedded within it, with a small gap between them. On the docking disc 31, three annular grooves 311 are machined around the outer part of the opening and through the inner side, arranged vertically at equal intervals.

[0018] During metallographic sample preparation, the polishing cloth 4 is first laid on top of the polishing disc 2. The polishing cloth 4 is larger than the polishing disc 2, and its edge extends and covers the annular groove 311 on the mating disc 31. Subsequently, the mating disc 31 is moved upward by a lifting drive mechanism to contact the pressure ring 33, and the elastic ring 32 on its outer side is pressed into the annular groove 311. In this embodiment, the elastic ring 32 is made of elastic anti-slip rubber material, and its diameter in its natural state is slightly smaller than the bottom diameter of the annular groove 311. When forcibly pressed into the groove, the elastic ring 32 relies on its own elastic contraction force to tightly press the edge of the polishing cloth 4 between the bottom and wall of the annular groove 311, thereby achieving rapid tensioning and fixation of the polishing cloth 4. This design effectively avoids the polishing cloth from loosening or wrinkling during high-speed rotation, ensuring the flatness of the polished surface.

[0019] Example 2 Based on Example 1, this embodiment further optimizes and improves the quick disassembly and replacement mechanism of the polishing cloth 4.

[0020] To enable quick installation and removal of the polishing cloth 4, this device features a unique lifting drive mechanism. For example... Figures 4-5 As shown, the pressure ring 33 is fixedly connected to the mounting bracket 37 above it via the support rod 331 at its top, thereby keeping the pressure ring 33 fixed in a spatial position. Elastic rings 32 are fixed equidistantly to the outer side of the pressure ring 33.

[0021] The lifting drive mechanism is mainly used to drive the docking plate 31 to perform precise lifting movements. Specifically, fixed seats 312 are fixedly installed at both ends of the docking plate 31. A sleeve rod 35 is threaded into each sleeve 34. The top end of the sleeve rod 35 is connected to the output shaft of the servo motor 36 through a coupling, and is driven by the servo motor 36 to rotate forward and backward. The servo motor 36 is fixed to the mounting clamp 38 through the mounting bracket 37, and the mounting clamp 38 is fastened to the outside of the drive shaft 1.

[0022] When the polishing cloth needs to be replaced, the servo motor 36 is activated, driving the two sleeve rods 35 to rotate synchronously. Since the bottom of the sleeve 34 is restricted to the fixed base 312 and cannot move axially, according to the principle of threaded transmission, the rotating sleeve rods 35 will drive the entire sleeve 34 to move up and down, causing the fixed base 312 and the mating disc 31 fixed thereto to move together. When the mating disc 31 descends, its annular groove 311 separates from the stationary elastic ring 32, thereby releasing the pressure on the polishing cloth 4. The operator can then easily remove the old polishing cloth 4 from the device.

[0023] After replacing the polishing cloth 4, the servo motor 36 is controlled to rotate in the opposite direction, driving the sleeve rod 35 to cause the sleeve 34 to move the mating plate 31 upwards. As the mating plate 31 rises, its annular groove 311 precisely meets the stationary elastic ring 32. Under the upward force of the mating plate 31, the elastic ring 32 undergoes elastic deformation and finally locks into the annular groove 311, firmly pressing the polishing cloth 4 laid therein. The entire replacement process is completed through the relative movement of the mating plate 31 and the fixed pressure ring 33. The action is precise and reliable, achieving quick disassembly and assembly without tools, significantly improving work efficiency.

[0024] The implementation principle of the quick-release polishing cloth tension adjustment device for metallographic sample preparation of reinforcing bars in this application is as follows: In use, the entire device is first fastened to the drive shaft 1 of the polishing machine using mounting clamps 38, ensuring no relative rotation between the mounting clamps 38 and the drive shaft 1. Next, the polishing cloth 4 to be used is laid flat on the upper surface of the polishing disc 2, allowing its edges to naturally droop above the annular groove 311 of the mating disc 31. Then, the servo motor 36 is started, driving the sleeve rod 35 to rotate forward. Under the action of threaded transmission, the sleeve 34 drives the fixed seat 312 and the mating disc 31 to move upward as a whole. When the mating disc 31 rises to the point where it contacts the elastic ring 32 outside the pressure ring 33 in the annular groove 311, the continuing upward movement of the mating disc 31 will compress the elastic ring 32, causing it to elastically deform and lock into the annular groove 311. At this time, the elastic ring 32 uses its own elastic contraction force to press and fix the edge of the polishing cloth 4 into the annular groove 311, and at the same time, the tension of the polishing cloth 4 is installed according to the different positions of the annular groove 311. When the polishing cloth 4 is worn and needs to be replaced, the servo motor 36 is controlled to rotate in the reverse direction, driving the sleeve rod 35 to drive the sleeve 34 and the docking plate 31 to descend, so that the annular groove 311 separates from the elastic ring 32. After the elastic ring 32 returns to its natural state, it disengages from the annular groove 311. At this time, the old polishing cloth 4 can be directly removed from between the polishing plate 2 and the docking plate 31. After replacing the new polishing cloth 4, the above installation steps are repeated to complete the quick replacement.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A quick-release polishing cloth tension adjustment device for metallographic sample preparation of reinforcing bars, comprising a drive shaft (1) and a polishing disc (2) fixed to its bottom end, characterized in that: It also includes an adjustment assembly (3) arranged around the drive shaft (1) and the polishing disc (2); the adjustment assembly (3) includes a docking disc (31) located outside the polishing disc (2), the docking disc (31) has an opening in the middle for the polishing disc (2) to be inserted, and the docking disc (31) has an annular groove (311) around the outside of the opening, a polishing cloth (4) is laid between the polishing disc (2) and the docking disc (31), and the edge of the polishing cloth (4) extends into the annular groove (311), and an elastic ring (32) matching its size is fitted inside the annular groove (311), and the polishing cloth (4) is pressed and fixed in the annular groove (311) by the elastic ring (32).

2. The quick-release polishing cloth tension adjustment device for metallographic sample preparation of reinforcing bars as described in claim 1, characterized in that: The elastic rings (32) are multiple and are arranged at equal intervals on the outside of the pressure ring (33). The pressure ring (33) is installed above the docking plate (31) by a lifting drive mechanism. The lifting drive mechanism is used to drive the pressure ring (33) to move closer to or away from the docking plate (31) so that the multiple elastic rings (32) can be simultaneously engaged or disengaged from the annular groove (311).

3. The quick-release polishing cloth tension adjustment device for metallographic sample preparation of reinforcing bars as described in claim 2, characterized in that: The lifting drive mechanism includes sleeves (34) symmetrically arranged at both ends of the pressure ring (33). A sleeve rod (35) is threaded into the sleeve (34). A servo motor (36) is provided at the top of the sleeve rod (35) for driving rotation. A mounting bracket (37) is provided at one end of the servo motor (36), and a mounting hoop (38) is provided at one end of the mounting bracket. The mounting hoop (38) is fastened to the outside of the drive shaft (1).

4. The quick-release polishing cloth tension adjustment device for metallographic sample preparation of reinforcing bars as described in claim 3, characterized in that: The two ends of the docking plate (31) are fixedly provided with fixing seats (312), the bottom of the sleeve (34) is installed on the top of the fixing seat (312), and the fixing seat (312) is fixedly connected to the docking plate (31).

5. The quick-release polishing cloth tension adjustment device for metallographic sample preparation of reinforcing bars as described in claim 3, characterized in that: The top of the pressure ring (33) is symmetrically provided with support rods (331), and the upper end of the support rods (331) is connected to the mounting bracket (37).

6. The quick-release polishing cloth tension adjustment device for metallographic sample preparation of reinforcing bars as described in claim 1, characterized in that: The number of elastic rings (32) and annular slots are both three, and the elastic rings (32) are made of elastic anti-slip rubber.

Images