A grinding and polishing machine for diamonds

Abstract

The utility model relates to diamond's polishing technical field, especially suitable for diamond's grinding and polishing machine, including installation base and mounting support, be provided with the polishing mechanism for down -pressing fixed and polishing different diamond on mounting support, the traction link is slidably arranged on mounting support, the traction mechanism for driving the traction link down -pressing diamond and fixed traction link is installed on installation base. The utility model only needs the operator to carry out the feeding and discharging in the safety area, and the main fixing and polishing process are all completed in the inside of the machinery, effectively avoid the contact of hand and high -speed rotating part, help to promote the security. The mechanical type down -pressing fixed is more firm, more reliable than manual clamping, can reduce the non -uniform polishing, diamond splashing caused by diamond loosening. Simultaneously, the position of the spray head is fixed, which can continuously and uniformly cool the polishing area, effectively inhibit the diamond burn or graphitization caused by high temperature, and ensure the product quality.

Description

Technical Field

[0001] This utility model relates to the field of diamond grinding and polishing technology, and in particular to a diamond grinding and polishing machine. Background Technology

[0002] Diamond, as a superhard material, has a wide range of applications in precision machining, cutting tools, optical devices, and jewelry.

[0003] Existing grinding and polishing machines for diamond, such as the one disclosed in CN212553297U, employ unidirectional rotary grinding or a simple oscillating structure. These machines present several significant problems: First, workpiece clamping and downward pressure control rely heavily on manual adjustment, resulting in low precision and poor consistency, easily leading to workpiece surface damage or uneven grinding pressure. Second, the lack of an effective cooling and debris removal mechanism during grinding makes it prone to diamond "burning" or graphitization due to localized high temperatures, affecting product quality. Third, the existing equipment has a single grinding motion trajectory, making it difficult to achieve uniform polishing of complex curved surfaces or high-precision planes, thus limiting its applicability. Utility Model Content

[0004] The purpose of this invention is to solve the problems of low pressure control accuracy, poor adaptability, and low safety in the existing technology, and to propose a grinding and polishing machine suitable for diamond.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A diamond grinding and polishing machine includes a mounting base and a mounting bracket. The mounting bracket is provided with a grinding mechanism for pressing down and fixing different diamonds, and a traction rod is slidably mounted on the mounting bracket. The mounting base is provided with a traction mechanism for driving the traction rod to press down the diamond and fixing the traction rod.

[0006] Preferably, the mounting bracket is fixedly installed at the top of the mounting base. The mounting bracket is a horizontal T-shaped bracket. The top of the mounting bracket is provided with a limiting groove for sliding the traction rod. The mounting bracket is fixedly installed with a nozzle for spraying water onto the diamond during grinding.

[0007] Preferably, the grinding mechanism includes a pressure turntable rotatably mounted at the bottom end of the traction rod, a drive turntable for placing diamonds at the top of the middle part of the mounting bracket, an arc-shaped grinding block fixedly mounted on the left side of the middle part of the mounting bracket, a limiting groove formed at the top end of the arc-shaped grinding block, an arc-shaped grinding plate slidably mounted on the limiting groove to cooperate with the arc-shaped grinding block for lateral limiting grinding of the diamonds, and a first drive motor for pulling the arc-shaped grinding plate to move on the left side of the mounting base.

[0008] Preferably, a limiting rod penetrating the arc-shaped grinding plate is fixedly installed on the left side of the middle part of the mounting bracket. The limiting rod has a limiting hole. A sliding hole is opened on the rear side of the arc-shaped grinding plate. An L-shaped rod for laterally moving the limiting rod is slidably fitted in the sliding hole. A limiting block for limiting the L-shaped rod is fixedly installed on the left side of the arc-shaped grinding plate. A lead screw for pulling the arc-shaped grinding plate horizontally is fixedly installed at the output end of the first drive motor. A limiting nut for limiting the lead screw is fixedly installed inside the arc-shaped grinding plate.

[0009] Preferably, the traction mechanism includes a ratchet rotatably connected to the right side of the mounting bracket, a traction link for vertically moving the traction rod is connected to an eccentric pin on the ratchet, a limit slide rail is provided on the rear side of the mounting bracket, a limit wedge rod for limiting the rotation of the ratchet is slidably fitted on the limit slide rail, an abutment rod for abutting the limit wedge rod is slidably provided on the rear side of the mounting base, and an opening and closing rod for squeezing the abutment rod is provided on a pin on the rear side of the mounting base.

[0010] Preferably, a strong spring is fixedly installed between the bottom end of the opening / closing rod and the rear side of the mounting base, and the bottom end of the mounting base is provided with an L-shaped channel for slidingly connecting the limiting wedge rod and the abutment rod.

[0011] Compared with the prior art, the present invention has the following advantages: 1. This utility model uses a traction mechanism to drive the traction rod downwards, completing the workpiece fixing and preparation of the grinding mechanism. Operators only need to place the workpiece and start the machine, helping to reduce manual intervention and process changeover time. Simultaneously, the traction mechanism provides a constant and repeatable downward pressure through its mechanical structure, helping to ensure stable pressure between the diamond and the grinding wheel during grinding. Furthermore, the first drive motor controls the lateral movement of the arc-shaped grinding plate, contributing to improved product consistency.

[0012] 2. This invention only requires operators to load and unload materials within a safe area. The main fixing and grinding processes are completed inside the machine, effectively avoiding contact between hands and high-speed rotating parts, thus improving safety. Mechanical downward clamping is more secure and reliable than manual clamping, reducing uneven grinding and diamond splattering caused by diamond loosening. Simultaneously, the fixed nozzle position allows for continuous and uniform cooling of the grinding area, effectively inhibiting diamond burning or graphitization caused by high temperatures, ensuring product quality, and promptly flushing away grinding debris, thus improving polishing efficiency. It also improves the air quality of the working environment, protecting the health of operators. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a diamond grinding and polishing machine proposed in this utility model; Figure 2 This is a schematic diagram of the grinding mechanism of a diamond grinding and polishing machine proposed in this utility model; Figure 3 This is a schematic diagram of an arc-shaped grinding plate for a diamond grinding and polishing machine proposed in this utility model; Figure 4 This is a schematic diagram of a traction mechanism for a diamond grinding and polishing machine proposed in this utility model.

[0014] In the diagram: 1. Mounting base; 2. Mounting bracket; 3. Grinding mechanism; 31. Traction rod; 32. Drive turntable; 33. Pressing turntable; 34. Arc-shaped grinding block; 35. First drive motor; 36. Lead screw; 37. Limiting groove; 38. Arc-shaped grinding plate; 39. Limiting rod; 310. Limiting hole; 311. L-shaped rod; 312. Limiting block; 4. Nozzle; 5. Traction mechanism; 51. Strong spring; 52. Opening and closing rod; 53. Abutment rod; 54. Limiting wedge rod; 55. Ratchet; 56. Traction link. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] Reference Figures 1-4 A diamond grinding and polishing machine includes a mounting base 1 and a mounting bracket 2. The mounting bracket 2 is equipped with a grinding mechanism 3 for pressing down and fixing different diamonds. The grinding mechanism 3 includes a traction rod 31 with a pressing turntable 33 rotatably mounted at its bottom end. The bottom end of the traction rod 31 is rotatably connected to the pressing turntable 33 via a deep groove ball bearing. The inner ring of the bearing is interference-fitted with the traction rod 31, and the outer ring is interference-fitted with the center hole of the pressing turntable 33. A shoulder and a retaining ring are used for axial positioning. This connection method allows the pressing turntable 33 to passively rotate synchronously with the drive turntable 32, preventing scratches on the diamond surface due to relative sliding.

[0017] A drive turntable 32 for placing diamonds is provided at the top center of the mounting bracket 2. An arc-shaped grinding block 34 is fixedly mounted on the left side of the middle of the mounting bracket 2. The arc-shaped grinding block 34 is fixed to the boss on the left side of the middle of the mounting bracket 2 by countersunk bolts. The bolt holes are oblong holes, which allow for fine adjustment of the position of the arc-shaped grinding block 34 in the horizontal direction, so as to facilitate calibration of the fit clearance with the arc-shaped grinding plate 38. A limiting groove 37 is provided at the top. The limiting groove 37 is a rectangular groove structure. A rectangular slider is provided at the bottom of the arc-shaped grinding plate 38. The two are in sliding fit, which restricts the arc-shaped grinding plate 38 to move only in the horizontal direction.

[0018] An arc-shaped grinding plate 38, which cooperates with the arc-shaped grinding block 34 to perform lateral limiting grinding of diamond, is slidably installed on the limiting groove 37. A first drive motor 35 for pulling the arc-shaped grinding plate 38 to move is installed on the left side of the mounting base 1.

[0019] A limiting rod 39 that penetrates the arc-shaped grinding plate 38 is fixedly installed on the left side of the middle part of the mounting bracket 2. The limiting rod 39 has a limiting hole 310. The limiting rod 39 is a cylindrical optical axis, which is fixed to the boss on the left side of the middle part of the mounting bracket 2 by interference fit. It penetrates the through hole of the arc-shaped grinding plate 38 to form a double guide structure to ensure the straightness of the horizontal movement of the arc-shaped grinding plate 38.

[0020] The arc-shaped grinding plate 38 has a sliding hole on its rear side, and an L-shaped rod 311 for laterally moving the limiting rod 39 is slidably fitted inside the sliding hole. A limiting block 312 for limiting the L-shaped rod 311 is fixedly installed on the left side of the arc-shaped grinding plate 38. A lead screw 36 for pulling the arc-shaped grinding plate 38 horizontally is fixedly installed at the output end of the first drive motor 35. A limiting nut for limiting the lead screw 36 is fixedly installed inside the arc-shaped grinding plate 38. The limiting nut is pre-embedded inside the arc-shaped grinding plate 38. The limiting nut is rigidly connected to the arc-shaped grinding plate 38 by bolts, which converts the rotational motion of the lead screw 36 into the precise horizontal displacement of the arc-shaped grinding plate 38. The drive turntable 32 is driven by an external second drive motor.

[0021] A traction rod 31 is slidably mounted on the mounting bracket 2. A traction mechanism 5 is mounted on the mounting base 1 to drive the traction rod 31 to press down the diamond and fix the traction rod 31. The traction mechanism 5 includes a ratchet 55 rotatably connected to the right side of the mounting bracket 2. A traction link 56 for traction rod 31 to move vertically is connected to the eccentric pin on the ratchet 55. A limit slide rail is provided on the rear side of the mounting bracket 2. A limit wedge rod 54 for limiting the rotation of the ratchet 55 is slidably mounted on the limit slide rail. An abutment rod 53 for abutting the limit wedge rod 54 is slidably mounted on the rear side of the mounting base 1. An opening and closing rod 52 for squeezing the abutment rod 53 is provided on the rear side of the mounting base 1. The wedge-shaped part at the bottom of the limit wedge rod 54 abuts against the wedge-shaped part of the abutment rod 53.

[0022] A strong spring 51 is fixedly installed between the bottom end of the opening / closing rod 52 and the rear side of the mounting base 1. The bottom end of the mounting base 1 has an L-shaped channel for slidingly connecting the limiting wedge rod 54 and the abutment rod 53. The limiting wedge rod 54 has a T-shaped cross-section and slides in cooperation with the T-shaped limiting slide rail on the rear side of the mounting bracket 2. The top of the limiting slide rail has a limiting stop to prevent the limiting wedge rod 54 from dislodging. The lower end of the limiting wedge rod 54 extends into the L-shaped channel of the mounting base 1, and the top of the limiting wedge rod 54 corresponds to the tooth groove of the ratchet 55 to achieve one-way locking of the ratchet 55. The opening / closing rod 52 is mounted on the lug on the rear side of the mounting base 1 via a pin and can rotate around the pin. The contact area between the opening / closing rod 52 and the abutment rod 53 is machined into an arc surface to reduce contact stress. A third drive motor for driving the ratchet 55 is fixedly installed on the rear side of the mounting bracket 2.

[0023] It should be noted that the first drive motor 35, the second drive motor, and the third drive motor are all controlled by a matching servo controller.

[0024] Mounting bracket 2 is fixedly installed at the top of mounting base 1. Mounting bracket 2 is secured to the top of mounting base 1 with hexagonal socket head cap screws. The screws are evenly distributed along the bottom edge of mounting bracket 2 and are secured with spring washers to prevent loosening. This connection method ensures that mounting bracket 2 does not deform significantly when bearing the weight and working impact of grinding mechanism 3 and traction mechanism 5, providing rigid support for the overall equipment.

[0025] Mounting bracket 2 is a horizontal T-shaped bracket with an integrated cast structure. The top limiting groove, the middle drive turntable 32 mounting base, and the rear limiting slide rail are all integrally machined to avoid precision errors caused by splicing structures and ensure the coaxiality and perpendicularity of the movement trajectories of each component. The top of mounting bracket 2 has a limiting groove for sliding the traction rod 31. The traction rod 31 passes through the limiting groove at the top of mounting bracket 2 with a precision clearance fit. The limiting groove has a rectangular cross-section, restricting the traction rod 31 to slide only in the vertical direction. The inner wall of the limiting groove is hardened and polished to reduce friction and wear during the sliding of the traction rod 31.

[0026] Mounting bracket 2 is fixedly mounted with a nozzle 4 for spraying water onto the diamond during grinding. The nozzle 4 is mounted on the extension arm of mounting bracket 2 via a right-angle pipe connector and a fastening clamp. The right-angle pipe connector is threaded to mounting bracket 2 to ensure precise water spray coverage of the diamond. The water inlet of nozzle 4 is connected to an external water source via a high-pressure hose. The hose is connected to the right-angle pipe connector via a quick connector for easy disassembly and maintenance.

[0027] It should be noted that the specific models and specifications of the first drive motor 35, the second drive motor and the third drive motor need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be elaborated here.

[0028] The functional principle of this utility model can be explained through the following operation methods: When diamonds need to be polished: First, during the preparation phase, the operator places the diamond workpiece to be processed on the drive turntable 32 in the middle of the mounting bracket 2. Then, the equipment is started.

[0029] Next, the fixing and pressing stage begins. At this time, the traction mechanism 5 starts to work. Specifically, the third drive motor in this mechanism drives the ratchet 55 to rotate. Since the ratchet 55 is connected to the pin of the traction link 56 at the eccentric point, its rotational motion is converted into the up-and-down reciprocating motion of the traction link 56. Then, the traction link 56 drives the traction rod 31 connected to it to slide downward in the limiting groove of the mounting bracket 2. Finally, the pressing turntable 33 at the bottom of the traction rod 31 presses down smoothly, firmly fixing the diamond workpiece on the drive turntable 32. At the same time, the releasing opening and closing rod 52 presses against the abutment rod 53, so that the abutment rod 53 abuts against the limiting wedge rod 54 and locks the ratchet 55, ensuring that the pressure is stable and there is no rebound during the pressing process.

[0030] Subsequently, the rotary grinding and cooling stages are carried out simultaneously. After the diamond is fixed, the drive turntable 32 begins to rotate at high speed under the drive of the second drive motor, causing the diamond to rotate along with it. At the same time, the nozzle 4, which is fixedly installed on the mounting bracket 2, begins to continuously spray water onto the grinding area to uniformly cool the heat generated by high-speed friction, effectively preventing the diamond from being burned, and washing away grinding debris to optimize the working environment.

[0031] Next comes the crucial horizontal feed grinding stage. To precisely grind the rotating diamond, the first drive motor 35 starts, driving the lead screw 36 at its output end to rotate. Because the lead screw 36 engages with the limiting nut fixedly installed within the arc-shaped grinding plate 38, the rotational motion is converted into precise linear motion. Therefore, the arc-shaped grinding plate 38 moves horizontally along the limiting groove 37 and the limiting rod 39 at the top of the mounting bracket 2, cooperating with the fixed arc-shaped grinding block 34 to achieve progressive and uniform grinding of the rotating diamond from both sides. During this process, the L-shaped rod 311, which slides on the limiting rod 39, and the limiting block 312 effectively prevent the arc-shaped grinding plate 38 from shifting under force, ensuring the stability and accuracy of the grinding process.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A grinding and polishing machine suitable for diamond, comprising a mounting base (1) and a mounting bracket (2), characterized in that, The mounting bracket (2) is provided with a grinding mechanism (3) for pressing down and fixing different diamonds. A traction rod (31) is slidably provided on the mounting bracket (2). A traction mechanism (5) for driving the traction rod (31) to press down the diamond and fix the traction rod (31) is installed on the mounting base (1).

2. The grinding and polishing machine suitable for diamond according to claim 1, characterized in that, The mounting bracket (2) is fixedly installed at the top of the mounting base (1). The mounting bracket (2) is a horizontal T-shaped bracket. The top of the mounting bracket (2) is provided with a limiting groove for sliding the traction rod (31). The mounting bracket (2) is fixedly installed with a nozzle (4) for spraying water onto the diamond during grinding.

3. The grinding and polishing machine suitable for diamond according to claim 1, characterized in that, The grinding mechanism (3) includes a traction rod (31) with a downward pressure turntable (33) rotatably mounted at the bottom end. The mounting bracket (2) has a drive turntable (32) for placing diamonds at the top middle part. An arc-shaped grinding block (34) is fixedly mounted on the left side of the middle part of the mounting bracket (2). A limiting groove (37) is opened at the top end. An arc-shaped grinding plate (38) that cooperates with the arc-shaped grinding block (34) to perform transverse limiting grinding of the diamonds is slidably mounted on the limiting groove (37). A first drive motor (35) for pulling the arc-shaped grinding plate (38) to move is mounted on the left side of the mounting base (1).

4. A grinding and polishing machine suitable for diamond according to claim 3, characterized in that, A limiting rod (39) that penetrates the arc-shaped grinding plate (38) is fixedly installed on the left side of the middle part of the mounting bracket (2). A limiting hole (310) is opened on the limiting rod (39). A sliding hole is opened on the rear side of the arc-shaped grinding plate (38). An L-shaped rod (311) for laterally moving the limiting rod (39) is slidably fitted in the sliding hole. A limiting block (312) for limiting the L-shaped rod (311) is fixedly installed on the left side of the arc-shaped grinding plate (38). A lead screw (36) for pulling the arc-shaped grinding plate (38) to move horizontally is fixedly installed at the output end of the first drive motor (35). A limiting nut for limiting the lead screw (36) is fixedly installed in the arc-shaped grinding plate (38).

5. A grinding and polishing machine suitable for diamond according to claim 1, characterized in that, The traction mechanism (5) includes a ratchet (55) rotatably connected to the right side of the mounting bracket (2). A traction link (56) for traction rod (31) to move vertically is connected to the eccentric pin on the ratchet (55). A limit slide rail is provided on the rear side of the mounting bracket (2). A limit wedge rod (54) for limiting the rotation of the ratchet (55) is slidably mounted on the limit slide rail. An abutment rod (53) for abutting the limit wedge rod (54) is slidably provided on the rear side of the mounting base (1). An opening and closing rod (52) for squeezing the abutment rod (53) is provided on the rear side of the mounting base (1).

6. A grinding and polishing machine suitable for diamond according to claim 5, characterized in that, A strong spring (51) is fixedly installed between the bottom end of the opening and closing rod (52) and the rear side of the mounting base (1). The bottom end of the mounting base (1) has an L-shaped channel for slidingly connecting the limiting wedge rod (54) and the abutment rod (53).

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