A chuck-type conical surface precision grinding device for imitation diamond crystal blanks

Abstract

This application belongs to the field of grinding machine tool technology and discloses a conical surface fine grinding device with a chuck-type clamping mechanism for simulated diamond crystal blanks. The device includes a conical surface fine grinding frame assembly, a blank outer chuck assembly, a blank inner chuck assembly, an adjusting inner disc assembly, a blank-fixing ball seat assembly, and a face-changing actuation assembly. The blank-fixing ball seat assembly uses an adsorption tube arm to pre-fix the blank under negative pressure and drives multiple clamping arms to retract synchronously via the driving inner disc, achieving centered and aligned clamping of the blank. The adjusting inner disc assembly drives multiple sets of blank-fixing ball seat assemblies to tilt synchronously, so that the blank faces the fine grinding disc at a set angle. The face-changing actuation assembly actuates the blank-fixing ball seat assembly at a fixed angle, achieving precise switching between multiple fine grinding surfaces. This device improves the adaptability of blank clamping, the consistency of conical surface fine grinding, and the stability of batch processing.

Description

Technical Field

[0001] This application belongs to the field of grinding machine tool technology, specifically relating to a conical surface fine grinding device with a chuck-type clamping mechanism for diamond-like crystal blanks. Background Technology

[0002] Imitation diamond crystal blanks are a type of transparent or translucent blank used for processing jewelry, decorative parts, and handicrafts. The finished product's appearance usually requires fine grinding of multiple conical, prismatic, or inclined reflective surfaces to create a diamond-like refractive effect. During the processing of imitation diamond crystal blanks, the blank's clamping stability, clamping center position, inclined processing angle, and the face-changing accuracy of each processed surface directly affect the width of the conical surface, the position of the edge, surface consistency, and the final product's appearance quality. Therefore, conical surface fine grinding equipment not only needs to be able to bring the blank close to the fine grinding disc for grinding, but also needs to reliably position, adjust the angle, and perform multi-face repositioning of the blank during the processing.

[0003] In the current precision grinding of conical surfaces of imitation diamond crystal blanks, the blanks are mostly clamped by chucks, clamps, or fixtures of fixed sizes. Such clamping structures can usually only be adapted to blanks within a certain range of specifications. When there are deviations in the blank size or inconsistencies in batch specifications, problems such as non-centered placement of the blank, uneven clamping contact, excessive local force, or insufficient clamping force are likely to occur. For imitation diamond crystal blanks that are small in size and have a relatively smooth surface, if only a single mechanical clamping method is used for fixing, the blank is prone to slight wobble, shaking, or even falling off when the precision grinding disc contacts the grinding surface. This leads to deviation in the conical grinding position, inconsistent grinding surface width, and decreased processing stability.

[0004] Meanwhile, the fine grinding of the conical surface of the imitation diamond crystal blank is usually not a single-plane grinding process. Instead, the blank needs to be tilted at a certain angle towards the fine grinding disc, and after completing the processing of one conical or ridge surface, it is switched to the next grinding angle. In the existing processing methods, some equipment requires manual adjustment of the blank's tilt posture or simple rotation of the fixture to achieve the surface change. This method is not only inefficient, but also makes it difficult to guarantee the consistency of positioning after each angle adjustment and surface change. Especially when fine grinding multiple surfaces continuously, if there is a cumulative error in the angle of each surface change, it will cause problems such as different widths of adjacent conical surfaces, skewed edges, and irregular arrangement of reflective surfaces. In severe cases, it will lead to unqualified product appearance or direct scrapping.

[0005] Furthermore, in batch processing scenarios, multiple diamond-like crystal blanks often need to be clamped and precision ground simultaneously. While existing multi-station clamping structures can increase the number of blanks processed at a time, it is difficult to keep the tilt angles and face-changing angles between multiple stations completely consistent. When each clamping station is adjusted separately, it not only increases the difficulty of equipment debugging and manual operation time, but also easily causes differences in the processing surface angles between different blanks, reducing the appearance consistency of products in the same batch and affecting the quality of mass production.

[0006] Therefore, existing diamond-like crystal blank conical surface fine grinding equipment still suffers from problems such as insufficient adaptability to blank specifications, poor clamping and centering effect, insufficient blank stability during fine grinding, inconvenient tilt angle adjustment, low accuracy of multi-face repositioning, and poor consistency of multi-station synchronous processing. Based on the above problems, it is necessary to provide a diamond-like crystal blank chuck-type conical surface fine grinding device that can perform adsorption pre-fixation and mechanical positioning clamping of diamond-like crystal blanks of different sizes, and can realize synchronous tilt adjustment, fixed angle face repositioning, and lifting feed fine grinding after clamping, so as to improve the positioning accuracy, processing consistency, and batch production stability of diamond-like crystal blank conical surface fine grinding. Summary of the Invention

[0007] To address the problems mentioned in the background technology, a conical surface fine grinding process is formed by performing negative pressure pre-adsorption on the imitation diamond crystal blank, synchronous inward retraction and centering correction on multiple clamping arms, synchronous tilt angle adjustment on the blank fixing ball seat assembly, and fixed angle shifting and repositioning on multiple fine grinding surfaces. This process involves pre-fixing the blank, mechanical correction clamping, tilting fine grinding, and multi-face indexing and repositioning in a continuous manner. As a result, while adapting to imitation diamond crystal blanks of different sizes, the process improves the blank clamping stability, conical surface angle consistency, multi-face repositioning accuracy, and batch fine grinding quality.

[0008] To achieve the above objectives, this application provides the following technical solution: a conical surface fine grinding device with a chuck-type clamping mechanism for diamond-like crystal blanks, comprising a conical surface fine grinding frame assembly and a blank inner chuck assembly, and further comprising:

[0009] A blank holder assembly is provided, wherein the bottom of the blank holder assembly is rotatably mounted at the bottom of the blank chuck assembly, and the blank holder assembly is used to adsorb and fix the imitation diamond crystal blank during fine grinding and to mechanically position and clamp it.

[0010] The inner adjusting plate assembly is oscillatingly disposed inside the billet chuck assembly, and the top of the billet fixing ball seat assembly is rotatably disposed at the bottom of the inner adjusting plate assembly. The oscillation of the inner adjusting plate assembly drives the billet fixing ball seat assembly to adjust the tilt angle of the billet fixing ball seat assembly at the bottom of the billet chuck assembly during fine grinding.

[0011] A face-changing actuation component is disposed on one side of the top of the blank ball seat assembly. Based on the tilt angle adjustment of the blank ball seat assembly driven by the adjusting inner disc assembly, the face-changing actuation component performs indexing actuation on multiple fine grinding angles of the blank ball seat assembly.

[0012] The billet outer chuck assembly is rotatably mounted on the conical surface fine grinding frame assembly, and the billet inner chuck assembly is lifted and lowered inside the billet outer chuck assembly. By lifting and lowering the billet inner chuck assembly within the billet outer chuck assembly, the fine grinding height of the fixed billet ball seat assembly can be adjusted. This creates a continuous processing structure within the same device, including billet adsorption and pre-fixation, synchronous centered clamping, overall tilt angle adjustment, fixed angle face changing, and lifting feed fine grinding. This allows the imitation diamond crystal billet to complete the conical surface fine grinding of multiple conical surfaces under a stable clamping state.

[0013] Preferably, the conical fine grinding frame assembly includes a fine grinding frame and a boom. Guide rails are fixedly installed on both sides of the fine grinding frame, and a first cylinder is fixedly installed at one end of the fine grinding frame. Two first motors are fixedly installed on one side of the boom, and sliding seats are fixedly installed at the bottom of both sides of the boom. A fine grinding disc is installed on the top of the fine grinding frame through a motor drive.

[0014] The boom is slidably mounted above the precision grinding frame via a sliding seat and guide rail. The first cylinder is fixedly connected to the boom, which is located above the precision grinding disc. The guide rail and sliding seat guide the lateral movement of the boom, and the first cylinder drives the boom to reciprocate relative to the precision grinding disc, so that the clamped diamond-like crystal blank forms a lateral auxiliary grinding action during the precision grinding process, improving the uniformity of the conical grinding contact and the surface finishing effect.

[0015] Preferably, the billet outer chuck assembly includes an outer chuck, with a main shaft fixedly installed at both ends of the outer chuck, and a second cylinder and an air pump fixedly installed at the top of the outer chuck, with multiple flexible air pipes installed on the air pump;

[0016] The outer chuck is rotatably mounted inside the boom via a main shaft and bearings. The output shaft of the first motor is poweredly connected to the main shaft. Two sets of blank outer chuck assemblies are rotatably mounted inside the boom.

[0017] The billet inner chuck assembly includes an inner chuck, the bottom end of which is provided with multiple ball grooves, and a third cylinder is rotatably provided on the inner wall of the inner chuck.

[0018] The inner chuck is set inside the outer chuck, and the top of the inner chuck is fixedly connected to the second cylinder; so that on the basis of the rotational support of the outer chuck, the inner chuck is driven by the second cylinder to perform lifting and feeding actions, and the negative pressure adsorption air source is provided to the billet ball seat assembly through the air pump and soft air pipe, so that the billet clamping, lifting and lowering close to the fine grinding disc and negative pressure pre-fixing can be completed in the same clamping unit.

[0019] Preferably, the adjusting inner plate assembly includes a U-shaped frame plate, a second motor is fixedly installed on the top of the U-shaped frame plate, and a movable seat groove is opened on one side of the U-shaped frame plate;

[0020] The adjusting inner disc assembly is set inside the billet chuck assembly, and the front arm of the third cylinder is rotated and set at the movable seat groove position; so as to convert the extension and retraction action of the third cylinder into the swing adjustment action of the U-shaped frame, and drive multiple sets of fixed billet ball seat assemblies to tilt and swing synchronously through the U-shaped frame, so that multiple imitation diamond crystal billets can face the fine grinding disc at a uniform tilt angle, reducing the angle error caused by manual adjustment of the angle one by one.

[0021] Preferably, the fixed blank ball seat assembly includes a ball seat, a top platform fixedly disposed on the top of the ball seat, a top shaft fixedly disposed on the top of the top platform, a top wheel fixedly disposed on the top of the top shaft, an arc groove and a wheel groove being formed on the top wheel, a first arm platform and a second arm platform fixedly disposed on the inner wall of the ball seat, an arc-shaped slide rod fixedly disposed between the first arm platform and the second arm platform, an electromagnet fixedly disposed at one end of the arc-shaped slide rod, and a contact spring sleeved on the other end of the arc-shaped slide rod;

[0022] The ball seat is rotatably mounted at the bottom of the inner chuck via a ball groove;

[0023] The top shaft is rotatably mounted at the bottom of the U-shaped frame through bearings, the top wheel is located inside the U-shaped frame, and the top platform is located below the U-shaped frame; so as to form a universal rotation support through the ball seat and the ball groove, so that the fixed blank ball seat assembly can not only tilt and swing with the U-shaped frame, but also self-convert surface in the tilted state. At the same time, the arc groove and wheel groove on the top wheel provide a force-fitting foundation for subsequent fixed-angle turning and surface changing.

[0024] Preferably, the billet ball seat assembly further includes a bottom platform, an adsorption tube arm is provided at the center of the bottom platform, an air extraction tube is fixedly provided at the top of the adsorption tube arm, multiple limiting grooves are provided on the edge of the bottom platform, a limiting slider is slidably provided in the limiting groove, a drive rod and a clamping arm are fixedly provided at the top and bottom of the limiting slider, a drive inner disk is rotatably provided on the outer wall of the adsorption tube arm through a bearing, multiple drive arc grooves are provided on the drive inner disk, and a perforated side platform is fixedly provided on the edge of the drive inner disk, and a ring magnet is fixedly provided on one side of the perforated side platform;

[0025] The bottom platform is fixedly installed at the bottom of the inner wall of the ball seat, the perforated side platform is slidably installed on the arc-shaped slide rod, the two ends of the abutting spring abut against the perforated side platform and the second arm platform respectively, and the ring magnet and the electromagnet face each other;

[0026] When the limiting slider slides in the limiting groove, the driving rod is inserted in the driving arc groove;

[0027] The suction pipe extends outward from the top of the ball seat, and the end of the suction pipe away from the adsorption tube arm is connected to the soft air tube; the adsorption tube arm is used to pre-fix the diamond-like crystal blank under negative pressure, and the magnetic force between the electromagnet and the ring magnet drives the perforated side platform and the inner drive plate to rotate, so that the inner drive plate drives multiple clamping arms to retract in time through the drive arc groove and the drive rod, thereby achieving mechanical centering and clamping on the basis of negative pressure pre-fixation, improving the clamping reliability of small-sized, smooth-surface blanks.

[0028] Preferably, the face-changing actuation assembly includes a face-changing main shaft, two pulleys are fixedly disposed in the middle of the face-changing main shaft, and a face-changing bottom arm and a face-changing bottom wheel are fixedly disposed at the bottom of the face-changing main shaft, and a face-changing lever is fixedly disposed at the end of the face-changing bottom arm away from the face-changing bottom wheel;

[0029] The top of the face-changing spindle is rotatably mounted on the top of the U-shaped frame via a bearing. The second motor drives the face-changing spindle to rotate. The face-changing bottom wheel and top wheel are on the same horizontal plane. The face-changing bottom wheel rotates within the top wheel via an arc groove. The face-changing bottom arm drives the top wheel via a face-changing lever and a wheel groove. The top wheel rotates at a fixed angle through the lever and the wheel groove, and the angle position of the top wheel after rotation is maintained by the limiting cooperation between the bottom wheel and the arc groove. This makes the face-changing angle of the blank ball seat assembly more stable each time, reducing the problems of inconsistent cone width and edge offset.

[0030] Preferably, the bottom of the billet chuck assembly is provided with multiple sets of billet-fixing ball seat assemblies, and one side of the top of each set of billet-fixing ball seat assemblies is provided with a set of face-changing actuating components. The tops of the multiple sets of face-changing actuating components are rotatably mounted on the top of the U-shaped frame, and the multiple sets of face-changing actuating components are linked in series through pulleys and belts. This allows multiple sets of face-changing actuating components to move synchronously through a single power input, enabling multiple billet-fixing ball seat assemblies to perform face-changing adjustments of the same angle simultaneously, reducing the asynchronous movement and batch processing angle differences caused by separate adjustments at multiple workstations.

[0031] Preferably, the diamond-like crystal blank is initially fixed to the bottom of the fixed blank ball seat assembly by the adsorption of the adsorption tube arm. The driving inner disk drives the clamping arms at the bottom of multiple limiting sliders to synchronously retract and clamp through the driving arc groove and driving rod. Through the synchronous retraction and clamping of multiple clamping arms, the diamond-like crystal blank is centered and corrected at the center position of the bottom of the adsorption tube arm. By using a two-stage material fixation method of adsorption followed by clamping, the diamond-like crystal blank is less likely to fall off before mechanical clamping and is automatically pushed to the center position when multiple clamping arms retract synchronously, thereby improving the centering accuracy and clamping stability when clamping blanks of different sizes.

[0032] Preferably, the extension and retraction of the third cylinder drives the multiple blank holder assemblies on the inner disc assembly to tilt and swing synchronously within the inner chuck. The changing-face actuation assembly actuates the blank holder assemblies, causing the grinding angle at the bottom of the blank holder assemblies to be indexed and changed. This allows for the continuous switching of multiple grinding surfaces at a fixed angle based on the synchronous tilting and fine grinding of multiple sets of diamond-like crystal blanks, ensuring the consistency of the grinding angle between different conical surfaces of the same blank and between multiple blanks in the same batch.

[0033] Compared with the prior art, the beneficial effects of this application are:

[0034] 1. This application combines negative pressure adsorption with mechanical synchronous clamping to perform preliminary adsorption and fixation and centering correction clamping on the imitation diamond crystal blank. This allows the blank to be stably held in the clamping center position before entering the conical surface for fine grinding. This reduces the problems of poor adaptability of traditional fixed-size chucks to blank specifications, blank clamping eccentricity, and easy shaking or falling off during processing. As a result, it improves the clamping adaptability, positioning accuracy and fine grinding stability of imitation diamond crystal blanks of different sizes.

[0035] 2. This application uses a universal rotating support structure in conjunction with a swing-type angle adjustment structure to enable the clamped imitation diamond crystal blank to tilt synchronously as a whole during the fine grinding process, and to face the fine grinding disc in a stable tilted posture for conical surface processing. This avoids the positioning errors and low processing efficiency caused by repeated manual adjustment of the blank angle, and makes the blank clamping, angle adjustment and conical surface fine grinding actions form a continuous coordination, which is conducive to improving the consistency of the conical surface processing of the imitation diamond crystal blank and the appearance quality of the finished product.

[0036] 3. This application uses a fixed-angle toggle face-changing structure to precisely switch between different grinding surfaces of the imitation diamond crystal blank, and achieves synchronous face-changing processing of multiple blanks through a linkage transmission method, making the switching angles of multiple grinding surfaces more consistent, reducing the problems of conical width difference, edge deviation and product scrap caused by inconsistent face-changing angles; at the same time, it is combined with lifting feed and transverse reciprocating fine grinding action to improve the efficiency of multi-station continuous processing, and enhance the processing quality and production stability of batch fine grinding of imitation diamond crystal blanks. Attached Figure Description

[0037] Figure 1 This is a perspective view of the present application;

[0038] Figure 2 This is a perspective view of the conical surface grinding frame assembly of this application;

[0039] Figure 3 This is a perspective view of the billet outer chuck assembly, the billet inner chuck assembly, and the billet ball seat assembly of this application;

[0040] Figure 4This is a cross-sectional view of the billet outer chuck assembly, billet inner chuck assembly, adjusting inner disc assembly, billet ball seat assembly, and reversing actuation assembly of this application;

[0041] Figure 5 This is a perspective view of the blank outer chuck assembly of this application;

[0042] Figure 6 This is a cross-sectional view of the chuck assembly inside the blank in this application;

[0043] Figure 7 This is a perspective view of the adjustable inner disc assembly of this application;

[0044] Figure 8 This is a perspective view of the adjusting inner plate assembly, the blank holder assembly, and the face-changing toggle assembly of this application;

[0045] Figure 9 This is a perspective view of the blank holder assembly and the face-changing toggle assembly of this application;

[0046] Figure 10 This is a cross-sectional view of the solid ball bearing assembly of this application;

[0047] Figure 11 This is an exploded view of the solid ball bearing assembly of this application;

[0048] Figure 12 This is a perspective view of the blank holder assembly of this application.

[0049] Explanation of reference numerals in the attached drawings: 100, Conical fine grinding frame assembly; 101, Fine grinding frame; 102, Guide rail; 103, First cylinder; 104, First motor; 105, Boom; 106, Sliding seat; 107, Fine grinding disc; 200, Outer chuck assembly for billet; 201, Outer chuck; 202, Spindle; 203, Flexible air pipe; 204, Second cylinder; 205, Air pump; 300, Inner chuck assembly for billet; 301, Inner chuck; 302, Ball groove; 303, Third cylinder; 400, Adjustable inner disc assembly; 401, U-shaped frame disc; 402, Second motor; 403, Movable seat groove; 500, Fixed billet ball seat assembly; 501, Ball seat; 502, Top. 503. Platform; 504. Top shaft; 505. Top wheel; 506. Arc groove; 507. Wheel groove; 508. Electromagnet; 509. First arm platform; 510. Arc-shaped slide bar; 511. Contact spring; 512. Second arm platform; 513. Bottom platform; 514. Limiting slide groove; 515. Drive inner plate; 516. Drive arc groove; 517. Adsorption tube arm; 518. Perforated side platform; 519. Ring magnet; 520. Suction pipe; 521. Limiting slider; 522. Drive rod; 522. Clamping arm; 600. Face-changing toggle assembly; 601. Face-changing main shaft; 602. Pulley; 603. Face-changing bottom wheel; 604. Face-changing bottom arm; 605. Face-changing lever. Detailed Implementation

[0050] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0051] Please see Figures 1-12 As shown, this application provides a conical surface fine grinding device with a chuck-type clamping mechanism for diamond-like crystal blanks, including a conical surface fine grinding frame assembly 100 and a blank inner chuck assembly 300, and further comprising:

[0052] The blank ball seat assembly 500 is omnidirectionally mounted at the bottom of the blank chuck assembly 300, and the blank ball seat assembly 500 is used to adsorb and fix the imitation diamond crystal blank during fine grinding and to mechanically position and clamp it.

[0053] The inner disc assembly 400 is oscillatingly positioned inside the billet chuck assembly 300. The top of the billet ball seat assembly 500 is rotatably positioned at the bottom of the inner disc assembly 400. The oscillation of the inner disc assembly 400 drives the billet ball seat assembly 500 to adjust the tilt angle of the billet ball seat assembly 500 at the bottom of the billet chuck assembly 300 during fine grinding.

[0054] The face-changing actuation component 600 is located on one side of the top of the blank ball seat assembly 500. Based on the adjustment of the inner disc assembly 400 driving the blank ball seat assembly 500 to adjust the tilt angle, the face-changing actuation component 600 can index and actuate multiple fine grinding angles of the blank ball seat assembly 500.

[0055] The billet outer chuck assembly 200 is rotatably mounted on the conical fine grinding frame assembly 100. The billet inner chuck assembly 300 is lifted and positioned inside the billet outer chuck assembly 200. The fine grinding height of the fixed billet ball seat assembly 500 can be adjusted by lifting and lowering the billet inner chuck assembly 300 inside the billet outer chuck assembly 200.

[0056] In a preferred embodiment, please refer to Figure 2The conical fine grinding frame assembly 100 includes a fine grinding frame 101 and a boom 105. Guide rails 102 are fixedly installed on both sides of the fine grinding frame 101, and a first cylinder 103 is fixedly installed at one end of the fine grinding frame 101. Two first motors 104 are fixedly installed on one side of the boom 105, and sliding seats 106 are fixedly installed at the bottom of both sides of the boom 105. A fine grinding disc 107 is installed on the top of the fine grinding frame 101 through a motor drive. The boom 105 is slidably installed above the fine grinding frame 101 through the sliding seats 106 and the guide rails 102. The first cylinder 103 is fixedly connected to the boom 105, and the boom 105 is located above the fine grinding disc 107.

[0057] In a preferred embodiment, please refer to Figure 5 The billet outer chuck assembly 200 includes an outer chuck 201. Both ends of the outer chuck 201 are fixedly provided with a main shaft 202, and the top of the outer chuck 201 is fixedly provided with a second cylinder 204 and an air pump 205. The air pump 205 is provided with multiple flexible air pipes 203. The outer chuck 201 is rotatably mounted in the boom 105 through the main shaft 202 and bearings. The output shaft of the first motor 104 is poweredly connected to the main shaft 202. Two sets of billet outer chuck assemblies 200 are rotatably mounted in the boom 105.

[0058] In a preferred embodiment, please refer to Figure 6 The billet inner chuck assembly 300 includes an inner chuck 301, with multiple ball grooves 302 at the bottom of the inner chuck 301. A third cylinder 303 is rotatably mounted on the inner wall of the inner chuck 301. The inner chuck 301 is located inside the outer chuck 201, and the top of the inner chuck 301 is fixedly connected to the second cylinder 204.

[0059] In a preferred embodiment, please refer to Figure 7 The adjusting inner plate assembly 400 includes a U-shaped frame plate 401. A second motor 402 is fixedly installed on the top of the U-shaped frame plate 401, and a movable seat groove 403 is opened on one side of the U-shaped frame plate 401. The adjusting inner plate assembly 400 is set in the billet inner chuck assembly 300. The front arm of the third cylinder 303 is rotated and set at the position of the movable seat groove 403. Through the extension and retraction of the third cylinder 303, multiple billet ball seat assemblies 500 on the adjusting inner plate assembly 400 are driven to tilt and swing synchronously in the inner chuck 301. The billet ball seat assembly 500 is moved by the face-changing toggle assembly 600, so that the grinding angle at the bottom of the billet ball seat assembly 500 is indexed and changed.

[0060] In a preferred embodiment, please refer to Figures 10-12The ball seat assembly 500 includes a ball seat 501. A top platform 502 is fixedly mounted on the top of the ball seat 501. A top shaft 503 is fixedly mounted on the top of the top platform 502. A top wheel 504 is fixedly mounted on the top of the top shaft 503. An arc groove 505 and a wheel groove 506 are formed on the top wheel 504. A first arm platform 508 and a second arm platform 511 are fixedly mounted on the inner wall of the ball seat 501. An arc-shaped slide rod 509 is fixedly mounted between the first arm platform 508 and the second arm platform 511. An electromagnet 507 is fixedly mounted on one end of the arc-shaped slide rod 509, and a contact spring 510 is sleeved on the other end of the arc-shaped slide rod 509. The ball seat 501 is rotatably mounted on the inner chuck through the ball groove 302. At the bottom of 301, the top shaft 503 is rotatably mounted at the bottom of the U-shaped frame plate 401 via bearings. The top wheel 504 is located inside the U-shaped frame plate 401, and the top platform 502 is located below the U-shaped frame plate 401. The billet ball seat assembly 500 also includes a bottom platform 512. An adsorption tube arm 516 is provided at the center of the bottom platform 512, and an exhaust pipe 519 is fixedly provided at the top of the adsorption tube arm 516. Multiple limiting grooves 513 are provided on the edge of the bottom platform 512, and limiting sliders 520 are slidably arranged in the limiting grooves 513. A drive rod 521 and a clamping arm 522 are fixedly provided at the top and bottom of the limiting slider 520, respectively. The outer wall of the adsorption tube arm 516 is rotatably mounted via bearings. The device includes a drive inner plate 514 with multiple drive arc grooves 515. These grooves extend obliquely along the circumference of the drive inner plate 514 towards the axis of the adsorption tube arm 516. A perforated side platform 517 is fixedly mounted on the edge of the drive inner plate 514. A ring magnet 518 is fixedly mounted on one side of the perforated side platform 517. A bottom platform 512 is fixedly mounted on the bottom end of the inner wall of the ball seat 501. The perforated side platform 517 is slidably mounted on the arc-shaped slide rod 509. Two ends of the contact spring 510 abut against the perforated side platform 517 and the second arm platform 511, respectively. The ring magnet 518 and the electromagnet 507 face each other. The limiting slider 520 is in a limiting position. When sliding in the groove 513, the drive rod 521 is inserted in the drive arc groove 515, and the suction pipe 519 extends outward from the top of the ball seat 501. The end of the suction pipe 519 away from the adsorption tube arm 516 is connected to the soft air tube 203. The diamond crystal blank is initially fixed at the bottom of the fixed ball seat assembly 500 by the adsorption of the adsorption tube arm 516. The drive inner plate 514 drives the clamping arms 522 at the bottom of the multiple limit sliders 520 to synchronously retract and clamp through the drive arc groove 515 and the drive rod 521. Through the synchronous retraction and clamping of the multiple clamping arms 522, the diamond crystal blank is centered and corrected and clamped at the center position of the bottom of the adsorption tube arm 516.

[0061] The wheel groove 506 consists of multiple wheel grooves spaced at equal angles along the circumference of the top wheel 504. There is a conical face-changing angle between two adjacent wheel grooves 506. When the face-changing lever 605 enters and moves a wheel groove 506, it drives the top wheel 504 to rotate through a conical face-changing angle.

[0062] In a preferred embodiment, please refer to Figure 9 The face-changing actuation assembly 600 includes a face-changing main shaft 601. Two pulleys 602 are fixedly mounted in the middle of the face-changing main shaft 601, and a face-changing bottom arm 604 and a face-changing bottom wheel 603 are fixedly mounted at the bottom of the face-changing main shaft 601. A face-changing lever 605 is fixedly mounted at the end of the face-changing bottom arm 604 away from the face-changing bottom wheel 603. The top of the face-changing main shaft 601 is rotatably mounted on the top of the U-shaped frame 401 via a bearing. A second motor 402 drives the face-changing main shaft 601 to rotate. The face-changing bottom wheel 603 and the top wheel 504 are on the same horizontal plane. The face-changing bottom wheel 603 rotates within the top wheel 504 via the arc groove 505. The face-changing bottom arm 604 drives the top wheel 504 via the face-changing lever 605 and the wheel groove 506. The bottom of the billet chuck assembly 300 is provided with multiple sets of billet-fixing ball seat assemblies 500. Each set of billet-fixing ball seat assemblies 500 has a face-changing actuating assembly 600 on one side of its top. The tops of the multiple sets of face-changing actuating assemblies 600 are rotatably mounted on the top of the U-shaped frame 401. The multiple sets of face-changing actuating assemblies 600 are linked in series via pulleys 602 and belts.

[0063] The working principle of this application is as follows: When performing conical surface fine grinding on imitation diamond crystal blanks, existing equipment can only process crystal blanks of fixed size. The existing blank fixing method leads to the aforementioned problem. When fixing crystal blanks, existing blank fixing chucks are mostly of fixed size, which means that the chuck can only hold blanks of fixed size. In order to overcome the above problems, the bottom of the blank inner chuck assembly 300 of this invention is provided with multiple sets of blank fixing ball seat assemblies 500. The blank fixing ball seat assemblies 500 perform initial adsorption and fixing of the crystal blanks. Based on the initial adsorption and fixing, mechanical correction and fixing are performed. Through the above two-step fixing method, crystal blanks of different sizes can be fixed on the blank inner chuck assembly 300. Specifically, in actual use, the air pump 205 uses the flexible air tube 203 and the suction tube 519 to suction and fix the crystal blanks. The attached tube arm 516 is evacuated, creating a negative pressure structure at the bottom of the adsorption tube arm 516. At this time, the crystal blank can be adsorbed by the negative pressure at the bottom of the fixed blank ball seat assembly 500. After the initial fixation is completed, the electromagnet 507 is energized, and the electromagnet 507 and the ring magnet 518 generate magnetic repulsion. At this time, the electromagnet 507 drives the drive inner disk 514 to rotate clockwise on the adsorption tube arm 516 through the ring magnet 518. At this time, the drive inner disk 514 drives the clamping arms 522 at the bottom of multiple limit sliders 520 to synchronously retract and clamp through the drive arc groove 515 and the drive rod 521. Through the synchronous retraction and clamping of multiple clamping arms 522, multiple clamping arms 522 have a center correction structure, thereby center-correcting and clamping the diamond-like crystal blank at the center position of the bottom of the adsorption tube arm 516.

[0064] Through the above structural configuration, this application utilizes an air pump 205, a flexible air tube 203, an air extraction tube 519, and an adsorption tube arm 516 to form a negative pressure pre-fixing structure, and utilizes an electromagnet 507, a ring magnet 518, a drive inner plate 514, a drive arc groove 515, a drive rod 521, a limit slider 520, and a clamping arm 522 to form a synchronous centering clamping structure. This allows diamond-like crystal blanks of different sizes to be stably adsorbed first and then mechanically clamped and corrected. This overcomes the problems of traditional fixed-size chucks that can only adapt to a single specification of blank, blank placement being eccentric, uneven clamping contact, and easy shaking during grinding. It improves the blank clamping adaptability, center positioning accuracy, and conical surface fine grinding stability.

[0065] Based on the above, this application employs a two-stage fixing method on the fixed blank ball seat assembly 500 for corrective fixing of the crystal blank. During conical surface fine grinding of the crystal blank on the fixed blank ball seat assembly 500, the crystal blank needs to be in an inclined state to change different grinding angles, thereby changing different grinding surfaces. However, the following problem arises in this process: the fixed blank ball seat assembly 500 must first possess the ability to tilt and oscillate, and on top of this tilting and oscillation, it must also have a rotation function. Rotation is necessary to change different grinding angles. Overcoming the challenge of achieving both tilting and oscillation capabilities and rotation on top of this tilting and oscillation is crucial. The problem is that multiple sets of billet-fixing ball seat assemblies 500 are provided at the bottom of the billet chuck assembly 300. How to keep these multiple sets of billet-fixing ball seat assemblies 500 tilting and rotating synchronously to adjust their angle is an urgent problem to be solved. To overcome the above problem, this application provides an adjusting inner plate assembly 400 inside the billet chuck assembly 300. In actual use, the ball seat 501 at the bottom of the billet-fixing ball seat assembly 500 rotates in the ball groove 302, and a universal rotation structure is formed between the ball seat 501 and the ball groove 302. Through this universal structure, the tilting and swinging motion requirements of the billet-fixing ball seat assembly 500 are met on the one hand, and the rotation motion requirements of the billet-fixing ball seat assembly 500 after tilting and swinging are met on the other hand. In actual use, the extension and retraction of the third cylinder 303 causes the U-shaped frame plate 401 to tilt and swing within the inner chuck 301. Since the top shaft 503 of the multiple sets of fixed billet ball seat assemblies 500 is rotatably mounted on the top of the U-shaped frame plate 401, the U-shaped frame plate 401 causes the top of the fixed billet ball seat assembly 500 to tilt and swing. Because the ball seat 501 at the bottom of the fixed billet ball seat assembly 500 is restricted to rotate within the ball groove 302, the inner chuck assembly 400 can be adjusted to drive the synchronous tilting and swinging of the multiple sets of fixed billet ball seat assemblies 500. Through the tilting and swinging of the fixed billet ball seat assembly 500, the surface at the bottom of the fixed billet ball seat assembly 500 that holds the crystal billet tilts towards the precision grinding surface. The disc 107 facilitates subsequent grinding. In order to achieve synchronous rotation of multiple sets of fixed blank ball seat assemblies 500, this application provides a face-changing actuation assembly 600 on one side of the top of each set of fixed blank ball seat assemblies 500. In actual use, the top of the face-changing actuation assembly 600 is rotated and set on the top of the U-shaped frame disc 401. At this time, the second motor 402 on the inner disc assembly 400 drives a set of face-changing actuation assemblies 600 to rotate. Since multiple sets of face-changing actuation assemblies 600 are linked in series through pulleys 602 and belts, the face-changing actuation assembly 600 drives the fixed blank ball seat assembly 500 to rotate. In this way, the grinding angle adjustment of multiple sets of fixed blank ball seat assemblies 500 can be achieved by synchronous rotation.

[0066] Through the above structural configuration, this application utilizes the universal rotation structure formed by the ball seat 501 and the ball groove 302, in conjunction with the third cylinder 303, U-shaped frame 401, top shaft 503 and adjusting inner plate assembly 400, to enable multiple sets of fixed blank ball seat assemblies 500 to tilt and swing synchronously. Furthermore, by utilizing the second motor 402, the face-changing actuation assembly 600, the pulley 602 and the belt linkage structure, multiple sets of fixed blank ball seat assemblies 500 can synchronously self-change their surfaces in an inclined state. This overcomes the problems of traditional equipment where the blank tilt angle needs to be manually adjusted one by one, the face-changing angle is difficult to unify, and the synchronous consistency of multiple workstations is poor. It enables crystal blanks to complete multi-face fine grinding angle adjustment under a stable tilt posture, improving the continuity of conical surface processing and the consistency of batch processing.

[0067] Based on the above, it should be noted that when the crystal blank on the fixed ball seat assembly 500 is subjected to self-conversion surface grinding in an inclined state, if the rotation angle of the fixed ball seat assembly 500 is inconsistent each time, it will lead to non-standard grinding surfaces of the crystal blank, that is, the width of each grinding surface will vary, which will increase the product scrap rate. In order to solve the above problem, this application provides a top wheel 504 at the top of the top shaft 503, and a face-changing bottom wheel 603 and a face-changing bottom arm 604 at the bottom of the face-changing main shaft 601. In actual use, the face-changing main shaft 603... 1. Drive the face-changing bottom wheel 603 and face-changing bottom arm 604 to rotate. The face-changing bottom arm 604 rotates the top wheel 504 at a fixed angle through the face-changing lever 605 and the wheel groove 506. After the angle rotation, the face-changing bottom wheel 603 rotates in the arc groove 505 to limit the rotation position of the top wheel 504. In this way, the face-changing lever component 600 can drive the blank ball seat component 500 at a fixed angle, so that when the blank ball seat component 500 drives the crystal blank to adjust the grinding surface, it can ensure that the width of each grinding surface of the crystal blank is consistent.

[0068] Through the above structural configuration, this application utilizes the face-changing spindle 601, face-changing bottom wheel 603, face-changing bottom arm 604, face-changing lever 605, top wheel 504, wheel groove 506, and arc groove 505 to form a fixed-angle turning and limiting cooperation structure, so that the blank ball seat assembly 500 can complete the turning according to the set angle each time it self-changes its surface, and maintain a stable position after the face change. This overcomes the problems of inconsistent grinding surface width, skewed edge lines, and increased product scrap rate caused by inaccurate face-changing angles, and improves the angular consistency, edge regularity, and finished product appearance quality among multiple conical surfaces of the diamond-like crystal blank.

[0069] Based on the above, the boom 105 of this application is provided with two sets of blank outer chuck assemblies 200. In actual use, the second cylinder 204 on the blank outer chuck assembly 200 drives the blank inner chuck assembly 300 to move up and down within the blank outer chuck assembly 200, so that the blank fixed ball seat assembly 500 at the bottom of the blank inner chuck assembly 300 is close to the fine grinding disc 107. At the same time, during the grinding action, the boom 105 slides on the fine grinding frame 101 through the sliding seat 106 and the guide rail 102, and the first cylinder 103 drives the boom 105 to slide back and forth on the fine grinding disc 107. In this way, when the crystal blank on the blank fixed ball seat assembly 500 is ground on the fine grinding disc 107, it has a lateral reciprocating auxiliary grinding action, thereby ensuring the grinding effect on the crystal blank.

[0070] With the above structural configuration, this application uses the second cylinder 204 to drive the blank inner chuck assembly 300 and the blank fixed ball seat assembly 500 to perform lifting and feeding, so that the crystal blank can stably approach the fine grinding disc 107, and uses the first cylinder 103, arm 105, sliding seat 106 and guide rail 102 to form a transverse reciprocating grinding structure, so that the crystal blank forms a stable reciprocating grinding trajectory on the fine grinding disc 107, overcoming the problem that grinding in a single fixed position can easily cause uneven local grinding, and improving the uniformity of conical surface grinding, surface fine grinding quality and continuous processing efficiency.

[0071] It should be noted that the billet ball seat assembly 500 needs to rotate in actual use. At this time, the length of the flexible air tube 203 is set to a length with a certain redundancy to avoid the length of the flexible air tube 203 interfering with the rotation of the billet ball seat assembly 500. Alternatively, the suction tube 519 can be rotatably connected to the ventilation ring tube. The suction tube 519 is connected to the ventilation ring tube through a rotary sealing joint. The ventilation ring tube is fixed on the U-shaped frame plate 401. The flexible air tube 203 is connected to the ventilation ring tube so that the suction tube 519 can rotate relative to the ventilation ring tube when the billet ball seat assembly 500 rotates. The flexible air tube 203 is connected to the ventilation ring tube. Or other alternative existing technologies can be used. The above technologies are all known technologies, so they will not be described in detail.

[0072] It should be noted that in another embodiment of this application, in order to ensure the stable lifting and lowering of the inner chuck 301, the inner wall of the outer chuck 201 is provided with a vertical guide groove, and the outer wall of the inner chuck 301 is provided with a guide protrusion that slides with the vertical guide groove.

[0073] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A conical surface fine grinding device with a chuck holding mechanism for diamond-like crystal blanks, comprising a conical surface fine grinding frame assembly (100) and a blank inner chuck assembly (300), characterized in that, Also includes: Multiple sets of blank holding ball assembly (500) are provided. The bottom of the blank holding ball assembly (500) is rotatably mounted at the bottom of the blank chuck assembly (300). The blank holding ball assembly (500) is used to adsorb and fix the imitation diamond crystal blank during fine grinding and to mechanically position and clamp it. An adjusting inner disc assembly (400) is oscillatingly disposed inside the billet inner chuck assembly (300). The top of the billet fixing ball seat assembly (500) is rotatably disposed at the bottom of the adjusting inner disc assembly (400). The oscillation of the adjusting inner disc assembly (400) drives the billet fixing ball seat assembly (500) to adjust the tilt angle of the billet inner chuck assembly (300) at the bottom of the billet inner chuck assembly (300) during fine grinding. Multiple sets of face-changing actuation components (600) are provided on one side of the top of the blank ball seat assembly (500). Based on the tilt angle adjustment of the blank ball seat assembly (500) driven by the adjustment inner disk assembly (400), the face-changing actuation components (600) are used to index and actuate multiple fine grinding angles of the blank ball seat assembly (500). The billet outer chuck assembly (200) is rotatably mounted on the conical fine grinding frame assembly (100), and the billet inner chuck assembly (300) is raised and lowered inside the billet outer chuck assembly (200). The fine grinding height of the fixed billet ball seat assembly (500) is adjusted by raising and lowering the billet inner chuck assembly (300) inside the billet outer chuck assembly (200).

2. The conical surface fine grinding device with chuck clamping for diamond-like crystal blanks according to claim 1, characterized in that: The conical fine grinding frame assembly (100) includes a fine grinding frame (101) and a boom (105). Guide rails (102) are fixedly installed on both sides of the fine grinding frame (101), and a first cylinder (103) is fixedly installed at one end of the fine grinding frame (101). Two first motors (104) are fixedly installed on one side of the boom (105), and sliding seats (106) are fixedly installed at the bottom of both sides of the boom (105). A fine grinding disc (107) is installed on the top of the fine grinding frame (101) through a motor drive. The boom (105) is slidably mounted above the fine grinding frame (101) via a sliding seat (106) and a guide rail (102). The first cylinder (103) is fixedly connected to the boom (105), and the boom (105) is located above the fine grinding disc (107).

3. The conical surface fine grinding device with chuck clamping for imitation diamond crystal blanks according to claim 2, characterized in that: The billet outer chuck assembly (200) includes an outer chuck (201), with a main shaft (202) fixedly installed at both ends of the outer chuck (201), and a second cylinder (204) and an air pump (205) fixedly installed on the top of the outer chuck (201). The air pump (205) is provided with multiple flexible air tubes (203). The outer chuck (201) is rotatably mounted in the boom (105) via the main shaft (202) and bearings. The output shaft of the first motor (104) is poweredly connected to the main shaft (202). Two sets of blank outer chuck assemblies (200) are rotatably mounted in the boom (105). The billet inner chuck assembly (300) includes an inner chuck (301), the bottom end of which is provided with a plurality of ball grooves (302), and a third cylinder (303) is rotatably provided on the inner wall of the inner chuck (301). The inner chuck (301) is disposed inside the outer chuck (201), and the top of the inner chuck (301) is fixedly connected to the second cylinder (204).

4. The conical surface fine grinding device with chuck clamping for diamond-like crystal blanks according to claim 3, characterized in that: The adjustable inner plate assembly (400) includes a U-shaped frame plate (401), a second motor (402) is fixedly installed on the top of the U-shaped frame plate (401), and a movable seat groove (403) is opened on one side of the U-shaped frame plate (401). The adjusting inner disc assembly (400) is located inside the billet inner chuck assembly (300), and the front arm of the third cylinder (303) is rotatably located at the position of the movable seat groove (403).

5. The conical surface fine grinding device for chuck-held diamond-like crystal blanks according to claim 4, characterized in that: The fixed blank ball seat assembly (500) includes a ball seat (501), a top platform (502) is fixedly provided on the top of the ball seat (501), a top shaft (503) is fixedly provided on the top of the top platform (502), a top wheel (504) is fixedly provided on the top of the top shaft (503), an arc groove (505) and a wheel groove (506) are provided on the top wheel (504), a first arm platform (508) and a second arm platform (511) are fixedly provided on the inner wall of the ball seat (501), an arc-shaped slide rod (509) is fixedly provided between the first arm platform (508) and the second arm platform (511), an electromagnet (507) is fixedly provided at one end of the arc-shaped slide rod (509), and a contact spring (510) is sleeved on the other end of the arc-shaped slide rod (509); The ball seat (501) is rotatably mounted at the bottom of the inner chuck (301) via the ball groove (302); The top shaft (503) is rotatably mounted at the bottom of the U-shaped frame (401) via a bearing, the top wheel (504) is located inside the U-shaped frame (401), and the top platform (502) is located below the U-shaped frame (401).

6. The conical surface fine grinding device for chuck-held diamond-like crystal blanks according to claim 5, characterized in that: The blank ball seat assembly (500) further includes a bottom platform (512), with an adsorption tube arm (516) at the center of the bottom platform (512), a suction pipe (519) fixedly installed at the top of the adsorption tube arm (516), and multiple limiting grooves (513) opened on the edge of the bottom platform (512). A limiting slider (520) is slidably installed in the limiting groove (513). A driving rod (521) and a clamping arm (522) are fixedly installed at the top and bottom of the limiting slider (520), respectively. A driving inner plate (514) is rotatably installed on the outer wall of the adsorption tube arm (516) through a bearing. Multiple driving arc grooves (515) are opened on the driving inner plate (514), and a perforated side platform (517) is fixedly installed on the edge of the driving inner plate (514). A ring magnet (518) is fixedly installed on one side of the perforated side platform (517). The bottom platform (512) is fixedly installed at the bottom of the inner wall of the ball seat (501), the perforated side platform (517) is slidably installed on the arc-shaped slide rod (509), the two ends of the abutment spring (510) abut against the perforated side platform (517) and the second arm platform (511) respectively, and the ring magnet (518) and the electromagnet (507) face each other; When the limiting slider (520) slides in the limiting groove (513), the driving rod (521) is inserted in the driving arc groove (515); The suction tube (519) extends outward from the top of the ball seat (501), and the end of the suction tube (519) away from the adsorption tube arm (516) is connected to the soft air tube (203).

7. The conical surface fine grinding device for chuck-held diamond-like crystal blanks according to claim 6, characterized in that: The face-changing toggle assembly (600) includes a face-changing main shaft (601), two pulleys (602) are fixedly arranged in the middle of the face-changing main shaft (601), and a face-changing bottom arm (604) and a face-changing bottom wheel (603) are fixedly arranged at the bottom of the face-changing main shaft (601). A face-changing lever (605) is fixedly arranged at the end of the face-changing bottom arm (604) away from the face-changing bottom wheel (603). The top of the face-changing spindle (601) is rotatably mounted on the top of the U-shaped frame (401) via a bearing. The second motor (402) drives the face-changing spindle (601) to rotate. The face-changing bottom wheel (603) and the top wheel (504) are on the same horizontal plane. The face-changing bottom wheel (603) rotates in the top wheel (504) through the arc groove (505). The face-changing bottom arm (604) drives the top wheel (504) through the face-changing lever (605) and the wheel groove (506).

8. The conical surface fine grinding device for chuck-held diamond-like crystal blanks according to claim 7, characterized in that: The bottom of the billet chuck assembly (300) is provided with multiple sets of billet ball seat assemblies (500). Each set of billet ball seat assemblies (500) has a set of face-changing actuating assemblies (600) on one side of the top. The tops of the multiple sets of face-changing actuating assemblies (600) are rotatably mounted on the top of the U-shaped frame (401). The multiple sets of face-changing actuating assemblies (600) are linked together in series by pulleys (602) and belts.

9. The conical surface fine grinding device for chuck-held diamond-like crystal blanks according to claim 7, characterized in that: The diamond-like crystal blank is initially fixed to the bottom of the solid blank ball seat assembly (500) by the adsorption of the adsorption tube arm (516). The driving inner disk (514) drives the clamping arms (522) at the bottom of multiple limiting sliders (520) to synchronously retract and clamp through the driving arc groove (515) and the driving rod (521). Through the synchronous retraction and clamping of the multiple clamping arms (522), the diamond-like crystal blank is centered and corrected and clamped at the center position of the bottom of the adsorption tube arm (516).

10. The conical surface fine grinding device for chuck-held diamond-like crystal blanks according to claim 7, characterized in that: The extension and retraction of the third cylinder (303) drives the multiple blank ball seat assemblies (500) on the inner disc assembly (400) to tilt and swing synchronously within the inner chuck (301). The blank ball seat assembly (500) is moved by the face-changing actuating assembly (600), so that the grinding angle at the bottom of the blank ball seat assembly (500) is indexed and changed.

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