A cutting fixture for sapphire processing

Abstract

The utility model provides a kind of cutting fixed platform of sapphire processing, it is related to sapphire production and processing device field, solve the technical problem that traditional mechanical clamping exists stress concentration, wax fixation exists again and is cumbersome and chemical pollution to load and unload, including pedestal and detachably installed sapphire fixing base, annular water tank is set up on the fixed base upper surface, the water tank surrounds a convex fixed platform with capillary guide groove on upper surface, and platform height is lower than water tank height, when working, by accurate water injection to water tank to with platform surface flush, utilize capillary guide groove and form uniform water film between workpiece and platform automatically, again by the temperature control module of fixed base bottom Rapidly frozen ice layer is formed, to realize the stress-free clamping of workpiece, stable and reliable, workpiece loading and unloading are quickly and without any chemical pollution, especially suitable for high-precision processing of hard and brittle materials such as sapphire.

Description

Technical Field

[0001] This utility model relates to the field of sapphire production and processing equipment, specifically to a cutting and fixing table for sapphire processing. Background Technology

[0002] Due to its high hardness and brittleness, sapphire places extremely high demands on the clamping and fixation of workpieces when processed using methods such as diamond wire cutting. Traditional mechanical fixtures, such as clamping plates and vises, can easily create stress concentration inside the sapphire workpiece, leading to chipping, hidden cracks, or even breakage during or after processing, severely impacting the yield.

[0003] To address the issue of stress concentration, the industry also employs wax bonding, where the workpiece is adhered to a carrier plate using a special wax. While this method achieves uniform support through surface contact, its process is complex. Before processing, the wax needs to be heated and melted, and then allowed to cool and solidify. After processing, a tedious dewaxing and cleaning process is required. This not only consumes a significant amount of time, but the chemical solvents used can also cause environmental pollution and leave residues on the workpiece surface, resulting in unsatisfactory overall efficiency and cleanliness. Utility Model Content

[0004] In order to overcome the problems in the background technology, this utility model provides a cutting and fixing table for sapphire processing, which solves the technical problems of clamping stress, easy damage to workpieces, and low loading and unloading efficiency in traditional processing methods.

[0005] A sapphire cutting and fixing table includes a base, a sapphire fixing seat, a temperature control module, a water tank, and a control unit. The sapphire fixing seat is detachably mounted on the base, and its upper surface has an annular water groove. The inner circle of the annular water groove surrounds a raised fixing platform. The upper surface of the fixing platform is lower than the upper edge of the annular water groove, and its upper surface is provided with capillary guide grooves. The temperature control module is installed at the bottom of the sapphire fixing seat and corresponds to the area of ​​the fixing platform. The water tank is connected to the annular water groove through a water pipe, and a water pump is installed in the water tank. The control unit is electrically connected to the base, the temperature control module, and the water pump.

[0006] Furthermore, at least one liquid level sensor is installed inside the annular water tank, and the liquid level sensor is electrically connected to the control unit.

[0007] Furthermore, the temperature control module includes semiconductor cooling chips arranged in an array; a heat sink with a fan is also provided below the temperature control module.

[0008] Furthermore, the capillary guide grooves are either a parallel linear array or a radial array that diffuses from the center outwards.

[0009] Furthermore, the base is a motion platform that moves along the two horizontal directions, X and Y.

[0010] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model achieves surface contact fixation by forming a uniform thin layer of ice between the workpiece and the fixed platform. It utilizes the strong molecular adhesion and perfect filling characteristics generated by water during the phase transformation into ice to form a rigid, stress-free, and fully fitted fixed state, which evenly distributes the clamping force across the entire bottom surface of the workpiece. This avoids the stress concentration problem of traditional mechanical clamps and eliminates clamping damage to hard and brittle materials such as sapphire.

[0011] 2. The annular water tank and low-level platform structure, combined with a liquid level sensor, can accurately control the amount of water injected. The capillary guide grooves on the platform surface enable the water to spread automatically, quickly, and evenly, ensuring uniform ice layer thickness and no air bubbles, thus providing a guarantee for highly reliable clamping.

[0012] 3. Utilizing the bidirectional temperature control characteristics of semiconductor cooling chips, freezing or thawing can be completed efficiently, with extremely high loading and unloading efficiency. The entire process uses only pure water as a medium, with no chemical residues, eliminating cumbersome cleaning procedures and making the process extremely clean and environmentally friendly. Attached Figure Description

[0013] To clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments are explained.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the rear structure of this utility model; Figure 3 This is a schematic diagram of the sapphire mounting base structure of this utility model; Figure 4 This is a schematic diagram of the bottom structure of the sapphire mounting base of this utility model.

[0015] Figure label: 1-Base, 2-Sapphire mounting base, 21-Annular water tank, 211-Level sensor, 22-Fixed platform, 221-Capillary guide groove, 3-Temperature control module, 31-Semiconductor cooling chip, 32-Radiator, 4-Water tank. Detailed Implementation

[0016] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so as to facilitate the understanding of those skilled in the art.

[0017] See Figure 1-2 This utility model provides a cutting and fixing table for sapphire processing, including a base 1, a detachable sapphire fixing seat 2, a temperature control module 3, a water tank 4, and a control unit; The base 1 is the motion foundation of the entire fixed platform. In this embodiment, it is a precision motion platform driven by a servo motor to move along the X and Y horizontal directions. The base 1 is equipped with a positioning and locking mechanism for quick and repeatable installation and disassembly with the sapphire fixed base 2.

[0018] See Figure 3-4 The sapphire mounting base 2 is made of a high thermal conductivity material, such as copper alloy or aluminum alloy. An annular water groove 21 is machined on the upper surface of the mounting base 2. The inner circle of the water groove naturally surrounds and forms a centrally protruding mounting platform 22. The upper surface of the mounting platform 22 is slightly lower than the upper edge of the annular water groove 21. The upper surface of the mounting platform 22 has extremely high flatness and is machined with an array of capillary guide grooves 221. In this embodiment, these guide grooves 221 are a parallel linear array, used to guide the water film to spread automatically using the capillary effect.

[0019] Reference Figure 4 The temperature control module 3 is installed at the bottom of the fixed base 2, and its position corresponds precisely to the area of ​​the fixed platform 22 on the upper surface to ensure the most efficient heat transfer. In this embodiment, the temperature control module 3 is composed of multiple semiconductor cooling chips arranged in an array. A heat sink with a fan is connected below the semiconductor cooling chips to quickly dissipate heat into the air in the cooling working mode.

[0020] Reference Figure 1-2 The water tank 4 stores purified water and has a built-in miniature water pump 41. The water tank 4 is connected to the interface on the side wall of the annular water tank 21 through a water pipe. In order to achieve automated control, at least one liquid level sensor 211 is also installed in the annular water tank 21 to monitor the water level in the tank in real time.

[0021] The control unit is a PLC or microcontroller system, which is electrically connected to all electrical components of the base 1, such as the drive motor, temperature control module 3, water pump 41, and liquid level sensor 211, and is used to execute a preset program to control the entire clamping and releasing process.

[0022] Work process: Dry positioning of workpiece: The sapphire workpiece to be processed is placed in the center of the dry fixed platform 22 and precisely positioned by machine vision or manual means. Automated and precise water distribution: The control unit starts the water pump in the water tank 4 and begins to fill the annular water tank 21 with water; the liquid level sensor 211 monitors the water level in real time. When the water level rises to be exactly level with the upper surface of the fixed platform 22, the control unit immediately stops the water pump; at this time, due to the capillary effect, the water will be automatically and evenly drawn into the capillary guide groove 221 and fill the tiny gap between the workpiece and the platform, while expelling the air in the gap to the outside, thereby forming a bubble-free ultra-thin water film; Rapid freezing clamping: After water distribution is completed, the control unit immediately activates the temperature control module 3 to enter the cooling mode; the temperature of the fixed platform 22 drops to the preset temperature below zero (-10℃) in a short time (10-30 seconds); the ultra-thin water film quickly solidifies into a solid ice layer, firmly and stress-free freezing the sapphire workpiece onto the fixed platform; Processing and release: After clamping, the base 1 carries the entire fixed seat 2 into the cutting machine processing area for cutting; after processing is completed, the control panel 5 switches the temperature control module 3 to the heating mode, and the fixed platform 22 is quickly heated to a temperature above zero (+5℃), the ice layer melts instantly, and the workpiece can be easily removed without damage.

[0023] 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 cutting and fixing stage for sapphire processing, characterized in that, The system includes a base (1), a sapphire mounting base (2), a temperature control module (3), a water tank (4), and a control unit. The sapphire mounting base (2) is detachably mounted on the base (1), and an annular water groove (21) is formed on its upper surface. The inner circle of the annular water groove (21) surrounds a raised fixed platform (22). The upper surface of the fixed platform (22) is lower than the upper edge of the annular water groove (21), and a capillary guide groove (221) is provided on its upper surface. The temperature control module (3) is installed at the bottom of the sapphire mounting base (2) and corresponds to the area of ​​the fixed platform (22). The water tank (4) is connected to the annular water groove (21) through a water pipe, and a water pump is provided inside the water tank (4). The control unit is electrically connected to the base (1), the temperature control module (3), and the water pump.

2. The sapphire cutting and fixing table according to claim 1, characterized in that: At least one liquid level sensor (211) is provided in the annular water tank (21), and the liquid level sensor (211) is electrically connected to the control unit.

3. The sapphire cutting and fixing table according to claim 1, characterized in that: The temperature control module (3) includes semiconductor cooling chips (31) arranged in an array; a heat sink (32) with a fan is also provided below the temperature control module (3).

4. The sapphire cutting and fixing table according to claim 1, characterized in that: The capillary guide grooves (221) are either parallel linear arrays or radial arrays radiating outwards from the center.

5. The sapphire cutting and fixing table according to claim 1, characterized in that: The base (1) is a motion platform that moves along the two horizontal directions X and Y.

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