Silicon rod preparation device and method

Abstract

The invention relates to the technical field of silicon rod processing, and discloses a silicon rod preparation device which comprises an operation table and further comprises a base fixedly connected to the bottom of the operation table and used for supporting the operation table; the two stand columns are fixedly connected to the top of the operation table and located on the front side and the rear side. And the rotating mechanism is arranged on the two stand columns and used for rotating the silicon rod. The whole circular plate is driven by the rotating mechanism to rotate, so that revolution of the silicon rod is realized; meanwhile, a rotating rod of the autorotation mechanism is driven by the transmission mechanism to rotate, so that the silicon rod autorotates in the hexagonal barrel, and the grinding material is in full contact with the silicon rod through the superposition motion of revolution and autorotation, so that the grinding efficiency is remarkably improved, and the problem of uneven surface caused by traditional one-way grinding is avoided; a push plate in the grinding assembly periodically stretches out and draws back under the centrifugal force and gravity action of a balancing weight, grinding materials are pushed to dynamically collide with the silicon rods, the grinding effect is further refined, and the device is particularly suitable for precise machining of the high-hardness silicon rods.

Description

Technical Field

[0001] The present invention relates to the technical field of silicon rod processing, and in particular to a silicon rod preparation device and method. Background Art

[0002] As the core raw material of the photovoltaic industry and semiconductor manufacturing, the surface quality of silicon rods directly affects the yield and performance of subsequent processes such as slicing, battery preparation and chip etching.

[0003] For example, application No. 201611110102.4 discloses a silicon rod grinder, which uses a guide plate with an arc surface structure at the top, so that the original surface contact is changed to point contact, which can make irregular silicon rods rotate under the rotation of two grinding wheels, facilitating the grinding of silicon rods, bringing great convenience to silicon rod processing, solving technical problems, and improving the economic benefits of the enterprise.

[0004] However, traditional grinding equipment mostly adopts unidirectional rotation grinding or linear friction. The relative motion trajectory of the silicon rod and the grinding medium is single, which can easily lead to surface scratches and uneven material removal rate. Especially in the processing of high-hardness silicon rods (such as single crystal silicon), repeated processing is required to meet the precision requirements, which is inefficient. Therefore, a silicon rod preparation device and method are proposed to solve the above-mentioned problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a silicon rod preparation device and method in view of the above-mentioned deficiencies in the prior art.

[0006] In order to solve the above technical problems, the present invention adopts a technical solution: a silicon rod preparation device, comprising an operating table, and further comprising:

[0007] A base, fixedly connected to the bottom of the operating table, used to support the operating table;

[0008] Two upright columns, fixedly connected to the top of the operating table and located at the front and rear sides;

[0009] A rotating mechanism, provided on two upright posts, for rotating the silicon rods;

[0010] Multiple rotation mechanisms are equidistantly arranged on the rotating mechanism, and are used to install silicon rods and drive the silicon rods to rotate and grind;

[0011] A transmission mechanism, disposed on the back of the rotation mechanism, for driving the rotation mechanism to rotate;

[0012] The rotating mechanism comprises:

[0013] The two circular plates are connected to each other by a plurality of connecting rods arranged in a circumference and at equal intervals;

[0014] A rotating shaft is fixedly passed through the two circular plates and has two ends extending forward and backward respectively, and is rotatably connected to the tops of the two columns through a bearing seat;

[0015] The rotation mechanism comprises:

[0016] A plurality of rotating rods are respectively rotatably connected between the two circular plates and located between two adjacent connecting rods;

[0017] The fixed box is fixedly connected between the front and rear rotating rods respectively, and a grinding assembly is provided inside the fixed box for loading and grinding the silicon rods.

[0018] Preferably, the rotating mechanism further comprises:

[0019] A gear ring, fixedly sleeved on the outer wall of the rear circular plate;

[0020] The motor is fixedly connected to the top of the operating table, and a gear is fixedly installed on the output end of the motor, and the gear is engaged with the gear ring to drive the gear ring to rotate.

[0021] Preferably, the rotation mechanism further comprises:

[0022] a cover plate, disposed above the fixed box, for limiting the movement of the grinding assembly;

[0023] The clamping assembly is arranged on the fixing box and is used for fixing the cover plate.

[0024] Preferably, the clamping assembly includes:

[0025] A fixing rod, fixedly connected to the top of the cover plate;

[0026] The front and rear sides of the fixing box are respectively fixedly connected to the limiting plate 1, and the side of the limiting plate 1 away from the fixing box is fixedly connected to the limiting plate 2 via a round rod;

[0027] A slot is provided on the first limiting plate, and the fixing rod is arranged in the slot. Two shift rods are fixedly connected between the second limiting plate and the first limiting plate and are located on both sides of the slot.

[0028] The two clamping rods are respectively rotatably connected to the outer wall of the round rod, and a tension spring is connected between the two clamping rods for pulling the two clamping rods to move relative to each other and clamp to the outer wall of the fixed rod.

[0029] Preferably, two arc-shaped limiting holes are provided on the second limiting plate, and a limiting sliding column is fixedly connected to the clamping rod, and the limiting sliding column slides in the arc-shaped limiting hole.

[0030] Preferably, the grinding assembly comprises:

[0031] The hexagonal grinding cylinder is placed inside the fixed box;

[0032] A sealing cover is installed at the front opening of the hexagonal grinding cylinder and is connected by three equally spaced claws;

[0033] The hexagonal cylinder is fixedly connected to the inner wall of the hexagonal grinding cylinder, and the outer wall of the hexagonal cylinder is provided with a plurality of rectangular holes, and silicon rods, grinding materials and water are placed on the inner wall of the hexagonal cylinder.

[0034] Preferably, the grinding assembly further comprises:

[0035] A plurality of push plates are respectively arranged in rectangular holes on the lower hexagonal cylinder;

[0036] The bottom of the push plate is fixedly connected to a sliding column, and movably passes through the hexagonal grinding cylinder;

[0037] The sliding columns along the axial direction of the hexagonal cylinder are fixedly connected by connecting rods 2, and a movable plate is fixedly connected between the connecting rods 2 on the left and right sides;

[0038] Two push rods are fixedly connected to the bottom of the movable plate, and one end of the push rod movably passes through the fixed box and extends downward, and is connected to a counterweight block;

[0039] The outer wall of the push rod is sleeved with a second tension spring, and the two ends of the second tension spring are respectively connected to the counterweight block and the fixing box.

[0040] Preferably, the transmission mechanism includes:

[0041] A plurality of sprockets are fixedly sleeved on the extended end of the rotating rod;

[0042] Two sprockets 2 are mounted on the back of the rear circular plate through a transmission shaft and are located between two adjacent sprockets 1;

[0043] The two sprockets three are both sleeved on the outer wall of the rotating shaft, and the sprocket one and the sprocket three are respectively connected by the chain one and the chain two.

[0044] A method for preparing a silicon rod comprises the following steps:

[0045] Step 1: Place the silicon rod, abrasive, and polishing liquid into the hexagonal cylinder in a volume ratio of 1:3:1, ensuring that the silicon rod is completely immersed. Cover with the sealing cover and lock it with the claws to prevent leakage.

[0046] Step 2: Place the hexagonal grinding cylinder into the fixed box, cover it with the cover, and lock it with the snap-fit ​​assembly;

[0047] Step 3: The motor drives the gear ring through the gear, which drives the circular plate to rotate as a whole, causing the silicon rod to roll in the hexagonal cylinder to achieve macro-uniform grinding;

[0048] Step 4: Sprocket 3 drives the rotating rod through the chain, causing the fixed box to rotate. The silicon rod and the abrasive produce micro friction to remove surface defects.

[0049] Step 5: The counterweight periodically pushes the push plate under the action of centrifugal force and gravity, forming a pulsed extrusion to accelerate the grinding of the silicon rod by the grinding material.

[0050] The present invention adopts the above technical solution, which can bring the following beneficial effects:

[0051] 1. This silicon rod preparation device uses a rotating mechanism to drive the entire circular plate to rotate, achieving orbital revolution of the silicon rod. Simultaneously, a transmission mechanism drives the rotating rod of the rotation mechanism to rotate, causing the silicon rod to rotate within the hexagonal cylinder. The combined motion of revolution and rotation ensures full contact between the abrasive and the silicon rod, significantly improving grinding efficiency and avoiding the surface unevenness caused by traditional unidirectional grinding. The push plate in the grinding assembly periodically expands and contracts due to the centrifugal force of the counterweight and gravity, pushing the abrasive into dynamic collision with the silicon rod, further refining the grinding effect. This device is particularly suitable for the precision machining of high-hardness silicon rods.

[0052] 2. The silicon rod preparation device integrates a rotating mechanism, a self-rotating mechanism, and a transmission mechanism into the same device. Through gear-gear ring drive and chain transmission, chain one and chain two achieve synchronous power transmission, eliminating the need for additional complex control, reducing equipment size and energy consumption. The hexagonal grinding cylinder is quickly connected through a fixed box and a cover plate. The loading and removal of silicon rods, abrasives, and water are convenient, shortening the production cycle and being suitable for batch continuous operations.

[0053] 3. The silicon rod preparation device has a hexagonal tube with an edge structure that can form a multi-directional grinding path. The grinding intensity can be adjusted in conjunction with the push plate in the rectangular hole to accommodate silicon rods with different diameters or surface requirements. The centrifugal force is controlled by adjusting the motor speed. Combined with the gravity of the counterweight, the extension and retraction frequency and force of the push plate can be flexibly adjusted to achieve multi-level process requirements from coarse grinding to fine grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a schematic diagram of the structure of the present invention;

[0055] Figure 2 It is a schematic diagram of the side structure of the present invention;

[0056] Figure 3 For the present invention Figure 2 A in the middle is an enlarged structural diagram;

[0057] Figure 4 This is a schematic diagram of the structure of the present invention from a side view;

[0058] Figure 5 This is a schematic structural diagram of the rotating mechanism of the present invention;

[0059] Figure 6 This is a schematic diagram of the exploded structure of the rotating mechanism of the present invention;

[0060] Figure 7 It is a structural schematic diagram of the rotation mechanism of the present invention;

[0061] Figure 8 For the present invention Figure 7 The enlarged structural diagram at B in the middle;

[0062] Figure 9 This is a schematic diagram of the explosion structure of the rotation mechanism of the present invention;

[0063] Figure 10 For the present invention Figure 9 The enlarged structural diagram at C in the middle;

[0064] Figure 11 This is a schematic diagram of the grinding assembly structure of the present invention.

[0065] In the figure: 1. operating table; 2. base; 3. column; 4. rotating mechanism; 41. circular plate; 42. connecting rod 1; 43. rotating shaft; 44. gear ring; 45. gear; 46. motor; 5. rotating mechanism; 51. rotating rod; 52. fixing box; 53. clamping assembly; 531. fixing rod; 532. limiting plate 1; 533. clamping claw; 534. gear lever; 535. tension spring 1; 536. limiting sliding column ; 54. Cover plate; 55. Grinding assembly; 551. Hexagonal grinding cylinder; 552. Sealing cover; 553. Claw; 554. Hexagonal cylinder; 555. Push plate; 556. Sliding column; 557. Connecting rod 2; 558. Push rod; 559. Counterweight; 5510. Tension spring 2; 6. Transmission mechanism; 61. Sprocket 1; 62. Sprocket 2; 63. Sprocket 3; 64. Chain 1; 65. Chain 2. DETAILED DESCRIPTION

[0066] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0067] See also Figure 1-11 One embodiment of the present invention is: a silicon rod preparation device, including an operating table 1, and further comprising:

[0068] The base 2 is fixedly connected to the bottom of the operating table 1 and is used to support the operating table 1;

[0069] Two columns 3 are fixedly connected to the top of the operating table 1 and are located at the front and rear sides;

[0070] A rotating mechanism 4 is provided on the two columns 3 and is used to rotate the silicon rods;

[0071] Multiple rotation mechanisms 5 are equidistantly arranged on the rotating mechanism 4 and are used to install silicon rods and drive the silicon rods to rotate and grind;

[0072] The transmission mechanism 6 is provided on the back of the rotation mechanism 5 and is used to drive the rotation mechanism 5 to rotate;

[0073] The rotating mechanism 4 includes:

[0074] The two circular plates 41 are connected to each other by a plurality of connecting rods 42 arranged in a circumferential manner and at equal intervals;

[0075] The rotating shaft 43 is fixedly passed through the two circular plates 41 and has two ends extending forward and backward respectively, and is rotatably connected to the tops of the two columns 3 through the bearing seat;

[0076] The rotation mechanism 5 includes:

[0077] A plurality of rotating rods 51 are rotatably connected between the two circular plates 41 and located between two adjacent connecting rods 42;

[0078] The fixed box 52 is fixedly connected between the front and rear rotating rods 51 , and a grinding assembly 55 is provided inside the fixed box 52 for loading and grinding the silicon rods.

[0079] The rotating mechanism 4 also includes:

[0080] The gear ring 44 is fixedly mounted on the outer wall of the rear circular plate 41;

[0081] The motor 46 is fixedly connected to the top of the operating table 1 , and a gear 45 is fixedly installed on the output end of the motor 46 , and the gear 45 is engaged with the gear ring 44 to drive the gear ring 44 to rotate.

[0082] The rotation mechanism 5 also includes:

[0083] The cover plate 54 is provided above the fixed box 52 and is used to limit the movement of the grinding assembly 55;

[0084] The clamping assembly 53 is disposed on the fixing box 52 and is used to fix the cover plate 54 .

[0085] The clamping assembly 53 includes:

[0086] A fixing rod 531 is fixedly connected to the top of the cover plate 54;

[0087] The front and rear sides of the fixed box 52 are respectively fixedly connected to the limiting plate 1 532 , and the side of the limiting plate 1 532 away from the fixed box 52 is fixedly connected to the limiting plate 2 via a round rod;

[0088] A slot is formed on the first limiting plate 532, and a fixing rod 531 is disposed in the slot. Two shift rods 534 are fixedly connected between the second limiting plate and the first limiting plate 532 and are located on both sides of the slot.

[0089] The two clamping rods 533 are rotatably connected to the outer wall of the round rod, and a tension spring 535 is connected between the two clamping rods 533 to pull the two clamping rods 533 to move relative to each other and clamp to the outer wall of the fixed rod 531.

[0090] The second limiting plate is provided with two arc-shaped limiting holes, and the clamping rod 533 is fixedly connected to a limiting sliding post 536 , and the limiting sliding post 536 slides in the arc-shaped limiting holes.

[0091] The grinding assembly 55 includes:

[0092] The hexagonal grinding cylinder 551 is placed inside the fixed box 52;

[0093] The sealing cover 552 is installed at the front opening of the hexagonal grinding cylinder 551 and is connected by three equally spaced claws 553;

[0094] The hexagonal cylinder 554 is fixedly connected to the inner wall of the hexagonal grinding cylinder 551 , and a plurality of rectangular holes are opened on the outer wall of the hexagonal cylinder 554 . Silicon rods, grinding materials and water are placed on the inner wall of the hexagonal cylinder 554 .

[0095] The grinding assembly 55 also includes:

[0096] A plurality of push plates 555 are respectively disposed in rectangular holes on the lower hexagonal cylinder 554;

[0097] The bottom of the push plate 555 is fixedly connected to a slide post 556, which movably passes through the hexagonal grinding cylinder 551;

[0098] The sliding posts 556 along the axial direction of the hexagonal cylinder 554 are fixedly connected by connecting rods 557, and a movable plate is fixedly connected between the connecting rods 557 on the left and right sides.

[0099] The bottom of the movable plate is fixedly connected to two push rods 558, and one end of the push rod 558 movably passes through the fixed box 52 and extends downward, and is connected to a counterweight block 559;

[0100] A second tension spring 5510 is sleeved on the outer wall of the push rod 558 , and two ends of the second tension spring 5510 are connected to the counterweight 559 and the fixing box 52 respectively.

[0101] The transmission mechanism 6 comprises:

[0102] A plurality of sprockets 61 are fixedly sleeved on the extended end of the rotating rod 51;

[0103] Two sprockets 2 62 are mounted on the back of the rear circular plate 41 via a transmission shaft and are located between two adjacent sprockets 1 61;

[0104] The two sprocket threes 63 are both sleeved on the outer wall of the rotating shaft 43, and the sprocket one 61 and the sprocket three 63 are respectively connected by the chain one 64 and the chain two 65.

[0105] Working principle: Place the silicon rod to be ground into the hexagonal cylinder 554, and at the same time place the grinding material and water into the hexagonal cylinder 554. At this time, cover the sealing cover 552 and fix it by engaging the three claws 553. Then lift the handle on the hexagonal grinding cylinder 551 and place it into the fixed box 52. At this time, cover the cover 54 and press it downward to slide the fixing rod 531 into the slot of the limiting plate 532. Then, open the two claws 533. At this time, the tension spring 1 535 pulls the two claws 533 closer to each other and limits the fixing rod 531 to limit the movement of the fixing rod 531, thereby fixing the cover 54 to fix the hexagonal grinding cylinder 551.

[0106] At the same time, the control device controls the motor 46 to work, and the gear 45 on the motor 46 drives the gear ring 44 to rotate, which in turn drives the circular plate 41 to rotate, thereby driving the circular plate 41 and the rotating shaft 43 to rotate above the column 3, so as to roll and grind the silicon rods in the hexagonal cylinder 554, thereby improving the grinding effect of the silicon rods;

[0107] Furthermore, when the circular plate 41 rotates, it drives the rotating shaft 43 to rotate, and then drives the sprocket three 63 to rotate. At this time, when the sprocket three 63 rotates, it drives the chain one 64 and the chain two 65 to transmit, and drives the sprocket one 61 and the sprocket two 62 to rotate respectively, and directly drives the rotating rod 51 to rotate. At this time, when the rotating rod 51 rotates, it drives the fixed box 52 to rotate, which can further drive the silicon rod placed inside it to rotate in the hexagonal cylinder 554, and contact with the abrasive and water to grind, thereby grinding the silicon rod. At the same time, when the fixed box 52 rotates, when the counterweight block 559 rotates to the top, due to the action of centrifugal force and the counterweight block 55 9 The effect of gravity is offset. At this time, under the pull of the second tension spring 5510, the counterweight block 559 is pulled downward, thereby pushing the push rod 558 downward, thereby pushing the movable plate, and driving the second connecting rod 557 and the sliding column 556 to move, and at the same time pushing the push plate 555 downward and moving into the hexagonal tube 554. At the same time, when the counterweight block 559 rotates to the bottom, at this time, due to the centrifugal force and the gravity of the counterweight block 559, it is greater than the second tension spring 5510, and at this time it drives the push plate 555 downward and moves to the outside of the hexagonal tube 554, thereby changing the state of the push plate 555 to realize the grinding of the silicon rods in the hexagonal tube 554, so as to improve the grinding effect of the silicon rods.

[0108] See also Figure 1-11 One embodiment of the present invention is: a method for preparing a silicon rod, comprising the following steps:

[0109] Step 1: Place the silicon rod, abrasive, and polishing liquid into the hexagonal cylinder 554 in a volume ratio of 1:3:1, ensuring that the silicon rod is completely submerged. Cover with the sealing cap 552 and lock it with the claws 553 to prevent leakage.

[0110] Step 2: Place the hexagonal grinding cylinder 551 into the fixing box 52, cover it with the cover plate 54, and lock it with the snap assembly 53;

[0111] Step 3: The motor 46 drives the gear ring 44 through the gear 45, driving the circular plate 41 to rotate as a whole, causing the silicon rods to roll in the hexagonal cylinder 554, achieving macro-uniform grinding;

[0112] Step 4: The sprocket 3 63 drives the rotating rod 51 through the chain, causing the fixed box 52 to rotate. The silicon rod and the abrasive generate micro friction to remove surface defects.

[0113] Step 5: The counterweight 559 periodically pushes the push plate 555 under the action of centrifugal force and gravity, forming a pulsed extrusion to accelerate the grinding of the silicon rod by the grinding material.

[0114] The present invention provides a silicon ingot production apparatus and method. There are numerous methods and approaches for implementing this technical solution. The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also within the scope of protection of the present invention. Any components not specified in this embodiment may be implemented using existing technologies.

Claims

1. A silicon rod preparation device, comprising an operating table (1), characterized in that: Also includes: A base (2) is fixedly connected to the bottom of the operating table (1) and is used to support the operating table (1); Two upright posts (3) are fixedly connected to the top of the operating table (1) and are located at the front and rear sides; A rotating mechanism (4) is provided on the two columns (3) and is used for rotating the silicon rod; A plurality of self-rotating mechanisms (5) are equidistantly arranged on the rotating mechanism (4) in a circumferential manner, and are used to install silicon rods and drive the silicon rods to rotate and grind; A transmission mechanism (6) is provided on the back of the rotation mechanism (5) and is used to drive the rotation mechanism (5) to rotate; The rotating mechanism (4) comprises: Two circular plates (41) are connected to each other via a plurality of connecting rods (42) arranged in a circumferential manner and at equal intervals; A rotating shaft (43) is fixedly passed through the two circular plates (41) and has two ends extending forward and backward respectively, and is rotatably connected to the tops of the two columns (3) through a bearing seat; The rotation mechanism (5) comprises: A plurality of rotating rods (51) are respectively rotatably connected between the two circular plates (41) and located between two adjacent connecting rods (42); The fixed box (52) is fixedly connected between the front and rear rotating rods (51), and a grinding assembly (55) is provided inside the fixed box (52) for loading silicon rods and grinding the silicon rods.

2. The silicon rod preparation device according to claim 1, characterized in that: The rotating mechanism (4) further comprises: A gear ring (44) is fixedly sleeved on the outer wall of the rear circular plate (41); A motor (46) is fixedly connected to the top of the operating table (1), and a gear (45) is fixedly installed on the output end of the motor (46), and the gear (45) is engaged with the gear ring (44) to drive the gear ring (44) to rotate.

3. The silicon rod preparation device according to claim 2, characterized in that: The self-rotating mechanism (5) further comprises: a cover plate (54), disposed above the fixed box (52), for limiting the movement of the grinding assembly (55); The clamping assembly (53) is arranged on the fixing box (52) and is used to fix the cover plate (54).

4. The silicon rod preparation device according to claim 3, characterized in that: The clamping assembly (53) comprises: A fixing rod (531) is fixedly connected to the top of the cover plate (54); The front and rear sides of the fixed box (52) are respectively fixedly connected to the limiting plate 1 (532), and the side of the limiting plate 1 (532) away from the fixed box (52) is fixedly connected to the limiting plate 2 via a round rod; A slot is provided on the first limiting plate (532), and the fixing rod (531) is arranged in the slot. Two shift rods (534) are fixedly connected between the second limiting plate and the first limiting plate (532) and are located on both sides of the slot. The two clamping rods (533) are respectively rotatably connected to the outer wall of the round rod, and a tension spring (535) is connected between the two clamping rods (533) for pulling the two clamping rods (533) to move relative to each other and clamp to the outer wall of the fixed rod (531).

5. The silicon rod preparation device according to claim 4, characterized in that: Two arc-shaped limiting holes are provided on the limiting plate 2, and a limiting sliding post (536) is fixedly connected to the clamping rod (533), and the limiting sliding post (536) slides in the arc-shaped limiting hole.

6. The silicon rod preparation device according to claim 5, characterized in that: The grinding assembly (55) comprises: A hexagonal grinding cylinder (551) is placed inside the fixed box (52); A sealing cover (552) is mounted on the front opening of the hexagonal grinding cylinder (551) and is connected via three equally spaced claws (553); The hexagonal cylinder (554) is fixedly connected to the inner wall of the hexagonal grinding cylinder (551), and the outer wall of the hexagonal cylinder (554) is provided with a plurality of rectangular holes, and silicon rods, grinding materials and water are placed on the inner wall of the hexagonal cylinder (554).

7. The silicon rod preparation device according to claim 6, characterized in that: The grinding assembly (55) further comprises: A plurality of push plates (555) are respectively arranged in the rectangular holes on the lower hexagonal cylinder (554); The bottom of the push plate (555) is fixedly connected to a sliding column (556), and movably passes through the hexagonal grinding cylinder (551); The sliding columns (556) along the axial direction of the hexagonal cylinder (554) are fixedly connected by connecting rods (557), and a movable plate is fixedly connected between the connecting rods (557) on the left and right sides. Two push rods (558) are fixedly connected to the bottom of the movable plate, and one end of the push rod (558) movably passes through the fixed box (52) and extends downward, and is connected to a counterweight block (559); The outer wall of the push rod (558) is provided with a second tension spring (5510), and the two ends of the second tension spring (5510) are respectively connected to the counterweight block (559) and the fixing box (52).

8. The silicon rod preparation device according to claim 7, characterized in that: The transmission mechanism (6) comprises: A plurality of sprockets (61) are fixedly sleeved on the extended end of the rotating rod (51); Two sprocket wheels (62) are mounted on the back of the rear circular plate (41) via a transmission shaft and are located between two adjacent sprocket wheels (61); The two sprocket threes (63) are both sleeved on the outer wall of the rotating shaft (43), and the sprocket one (61) and the sprocket three (63) are respectively connected by a chain one (64) and a chain two (65).

9. The method for preparing a silicon rod according to claim 8, wherein: The following steps are involved: Step 1: Place the silicon rod, abrasive and grinding liquid into the hexagonal cylinder (554) in a volume ratio of 1:3:1, ensuring that the silicon rod is completely immersed, cover with a sealing cover (552), and lock it with a claw (553) to prevent leakage; Step 2: Place the hexagonal grinding cylinder (551) into the fixing box (52), cover it with the cover plate (54), and lock it with the snap-fit ​​assembly (53); Step 3: The motor (46) drives the gear ring (44) through the gear (45), driving the circular plate (41) to rotate as a whole, causing the silicon rod to roll in the hexagonal cylinder (554), achieving macro-uniform grinding; Step 4: The sprocket 3 (63) drives the rotating rod (51) through the chain, causing the fixed box (52) to rotate, and the silicon rod and the abrasive generate micro friction to remove surface defects; Step 5: The counterweight (559) periodically pushes the push plate (555) under the action of centrifugal force and gravity, forming a pulsed extrusion to accelerate the grinding of the silicon rod by the grinding material.

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