Stepped heating device applied to tungsten filament and high-strength filament drawing machine

Abstract

The utility model relates to the technical field of packaging of new energy photovoltaic silicon wafer cutting wires and chip bonding wires, in particular to a stepped heating device applied to a tungsten wire and high-strength wire drawer, which comprises a heating assembly, a heat conducting plate and a temperature measuring assembly, and is characterized in that the heat conducting plate is provided with a metal wire groove, a heating groove and a temperature measuring groove; the metal wire groove is provided with a notch so that a metal wire can be put in or taken out, the heating assembly comprises a plurality of heating units, and the power of the heating units is gradually decreased in the width direction of the heating assembly so that a temperature gradient can be formed. The beneficial effects of the utility model are that: because the wire drawer is in a diameter-changing process from thick to thin, the effect of softening thick wires is difficult to satisfy by heating at a unified temperature in a traditional temperature zone, i.e., the thick wire diameter and the small wire diameter need different temperature fields; the power of the heating unit is gradually reduced in the width direction of the heating assembly so as to form a temperature gradient, so that wires with different wire diameters are uniformly heated, the quality of the wires is stable, and the production yield is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy photovoltaic silicon wafer cutting wires and chip bonding wire packaging, and in particular to a stepped heating device applied to tungsten wire and high-strength wire drawing machines. Background Art

[0002] Tungsten wire is a filament made of tungsten metal or other materials. It has high strength, high temperature, high conductivity, high thermal conductivity and good plasticity. It is widely used in photovoltaic solar polysilicon, cutting of single crystal silicon rods, electronics, electrical, aerospace and medical fields. Because the wire diameter of tungsten wire is thin and the tensile strength is as high as 5800mpa, the utilization rate and yield of silicon wafers are greatly improved. In addition, bonding wire is most widely used in the semiconductor industry. It is an important component of semiconductor chips and can realize the electrical connection and mechanical support between chips and packages. In addition, bonding wire is also used in LED displays, solar panels, LCD screens and other fields, so that these products have higher performance and quality. However, in actual production, the quality of metal wire has always been unstable, which affects the production of electronic products. Semiconductor chips have many steps, and the accumulation of defects in multiple steps will increase costs. The utility model is suitable for new energy photovoltaic silicon wafer cutting wires and chip bonding wire packaging and other fields. Utility Model Content

[0003] In order to solve the problems in the above-mentioned background technology, the utility model provides a stepped heating device applied to tungsten wire and high-strength wire drawing machines for metal wire processing, and solves the problem of unstable metal wire processing quality in the prior art.

[0004] The utility model solves the technical problem by adopting the following scheme: a stepped heating device applied to tungsten wire and high-strength wire drawing machines, comprising a heating assembly for heating the metal wire, a heat conducting plate for fixing the heating assembly, and a temperature measuring assembly for measuring the temperature of the heat conducting plate, wherein the heat conducting plate is provided with a plurality of metal wire grooves for placing the metal wire, a plurality of heating grooves for placing the heating assembly, and a plurality of temperature measuring grooves for placing the temperature measuring assembly, the center lines of the plurality of metal wire grooves are coplanar, the center lines of the plurality of heating grooves are coplanar, the center lines of the plurality of temperature measuring grooves are coplanar, the distance between two adjacent metal wire grooves is equal, the distance between two adjacent heating grooves is equal, the distance between two adjacent temperature measuring grooves is equal, the metal wire groove is provided with a notch for placing or taking out the metal wire, the heating assembly comprises a plurality of heating units, and the power of the heating unit is arranged to decrease along the width direction of the heating assembly to form a temperature gradient.

[0005] In the above structure, the diameters of the plurality of metal wire grooves are equal, the diameters of the plurality of heating grooves are equal, and the diameters of the plurality of temperature measuring grooves are equal.

[0006] In the above structure, the center lines of the plurality of heating tanks are coplanar with the center lines of the plurality of temperature measuring tanks.

[0007] In the above structure, the temperature measuring component includes a plurality of temperature measuring units, and the center lines of the plurality of temperature measuring units are coplanar.

[0008] In the above structure, two heating units and one temperature measuring unit are arranged as a group, and one temperature measuring unit is placed between the two heating units.

[0009] In the above structure, the width of the slot is smaller than the radius of the wire slot.

[0010] In the above structure, the side walls of the slot are two parallel planes, and a middle plane equidistant from the two parallel planes passes through the center line of the wire slot.

[0011] In summary, the beneficial effects of the utility model are as follows: since the wire drawing machine is a process of changing diameter from thick to thin, the traditional uniform temperature heating in a temperature zone can hardly meet the effect of softening the thick wire, that is, the thick wire diameter and the small wire diameter require different temperature fields. By setting the power of the heating unit to decrease along the width direction of the heating component to form a temperature gradient, wires of different wire diameters are heated evenly, the wire quality is stabilized, and the production yield is improved.

[0012] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional diagram of the utility model.

[0014] In the figure: 1. metal wire; 2. heating component; 3. heat conducting plate; 4. temperature measuring component; 5. metal wire groove; 6. heating groove; 7. temperature measuring groove; 8. notch; 9. heating unit. DETAILED DESCRIPTION

[0015] In order to make the content of the utility model more clearly understood, the utility model is further described below based on specific embodiments in combination with the accompanying drawings.

[0016] It should be noted that the terms "center", "upper", "lower", "front", "back", "left", "right", "inner", "outer" and the like used herein to indicate directions or positional relationships are based on directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. Unless otherwise specified, "plurality" means two or more.

[0017] Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood by specific circumstances.

[0018] Referring to the accompanying drawings, a stepped heating device applied to a tungsten wire and high-strength wire drawing machine comprises a heating assembly 2 for heating a metal wire 1, a heat conducting plate 3 for fixing the heating assembly 2, and a temperature measuring assembly 4 for measuring the temperature of the heat conducting plate 3, wherein the heat conducting plate 3 is provided with a plurality of metal wire slots 5 for placing the metal wire 1, a plurality of heating slots 6 for placing the heating assembly 2, and a plurality of temperature measuring slots 7 for placing the temperature measuring assembly 4, the center lines of the plurality of metal wire slots 5 are coplanar, the center lines of the plurality of heating slots 6 are coplanar, the center lines of the plurality of temperature measuring slots 7 are coplanar, the distance between two adjacent metal wire slots 5 is equal, the distance between two adjacent heating slots 6 is equal, the distance between two adjacent temperature measuring slots 7 is equal, the metal wire slot 5 is provided with a notch 8 for placing or taking out the metal wire 1, the heating assembly 2 comprises a plurality of heating units 9, and the power of the heating unit 9 is arranged to decrease along the width direction of the heating assembly 2 to form a temperature gradient. The main purpose of heating control is to achieve zoned temperature control, use high temperature where the metal wire 1 has a large diameter, and adjust the temperature according to the wire gauge of the different metal wires 1. The application areas are photovoltaics, new energy tungsten wire for cutting silicon wafers, and high-temperature and high-strength wires.

[0019] Furthermore, the diameters of the plurality of metal wire slots 5 are equal, the diameters of the plurality of heating slots 6 are equal, and the diameters of the plurality of temperature measuring slots 7 are equal.

[0020] Furthermore, the metal wire 1 is a high-strength tungsten wire or molybdenum wire or a bonding wire.

[0021] Furthermore, the center lines of the plurality of heating tanks 6 are coplanar with the center lines of the plurality of temperature measuring tanks 7 .

[0022] Furthermore, the temperature measuring component 4 includes a plurality of temperature measuring units, and the center lines of the plurality of temperature measuring units are coplanar.

[0023] Furthermore, two heating units 9 and one temperature measuring unit are arranged as a group, wherein one temperature measuring unit is placed between the two heating units 9 .

[0024] Furthermore, the width of the notch 8 is smaller than the radius of the wire slot 5 .

[0025] Furthermore, the side walls of the slot 8 are two parallel planes, and a middle plane equidistant from the two parallel planes passes through the center line of the wire slot 5 .

[0026] Since the wire drawing machine is a diameter change process from thick to thin, the traditional uniform temperature heating in one temperature zone is difficult to meet the effect of softening thick wires, that is, thick wire diameters and small wire diameters require different temperature fields. The utility model sets the power of the heating unit 9 to decrease along the width direction of the heating component 2 to form a temperature gradient, so that the wire is heated evenly, the wire quality is stable, and the production yield is improved. Specifically, it has the following beneficial effects:

[0027] 1. By setting the power of the heating unit 9 to decrease gradually along the width direction of the heating assembly 2 so as to form a temperature gradient, the wire is heated evenly, the quality of the wire is stabilized, and the production yield is improved;

[0028] 2. By setting the temperature measuring component 4, the heating component 2 can be heated or interrupted, so that the temperature of the heat conducting plate 3 is more accurate;

[0029] 3. By providing a notch 8 in the metal wire slot 5, it is convenient for the metal wire 1 to be put into the metal wire slot 5 or taken out;

[0030] 4. By making the middle plane which is equidistant from the two parallel planes pass through the center line of the wire slot 5, the slot 8 is centered, so that the wire 1 can be easily put into or taken out of the wire slot 5.

[0031] The embodiments described above are only preferred implementation modes of the present utility model and cannot be used to limit the protection scope of the present utility model. Any non-substantial changes and modifications made by technicians in this field on the basis of the utility model shall fall within the protection scope of the present utility model.

Claims

1. A stepped heating device for tungsten wire and high-strength wire drawing machines, characterized in that: It includes a heating component for heating a metal wire, a heat conducting plate for fixing the heating component, and a temperature measuring component for measuring the temperature of the heat conducting plate, wherein the heat conducting plate is provided with a plurality of metal wire grooves for placing the metal wire, a plurality of heating grooves for placing the heating component, and a plurality of temperature measuring grooves for placing the temperature measuring component, the center lines of the plurality of metal wire grooves are coplanar, the center lines of the plurality of heating grooves are coplanar, the center lines of the plurality of temperature measuring grooves are coplanar, the distance between two adjacent metal wire grooves is equal, the distance between two adjacent heating grooves is equal, the distance between two adjacent temperature measuring grooves is equal, the metal wire grooves are provided with notches for placing or taking out the metal wire, and the heating component includes a plurality of heating units, the power of the heating units is arranged to decrease along the width direction of the heating component to form a temperature gradient.

2. The step-type heating device according to claim 1, characterized in that: The diameters of the plurality of metal wire grooves are equal, the diameters of the plurality of heating grooves are equal, and the diameters of the plurality of temperature measuring grooves are equal.

3. The step-type heating device according to claim 1, characterized in that: The width of the notch is smaller than the radius of the wire slot.

4. The step-type heating device according to claim 1, characterized in that: The side walls of the slot are two parallel planes, and a middle plane equidistant from the two parallel planes passes through the center line of the wire slot.

5. The step-type heating device according to claim 1, characterized in that: The side walls of the slot are two parallel planes, and a middle plane equidistant from the two parallel planes passes through the center line of the wire slot.

6. The step-type heating device according to claim 1, characterized in that: The center lines of the plurality of heating tanks are coplanar with the center lines of the plurality of temperature measuring tanks.

7. The step-type heating device according to claim 1, characterized in that: The temperature measurement component includes a plurality of temperature measurement units, and the center lines of the plurality of temperature measurement units are coplanar.

8. The step-type heating device according to claim 7, characterized in that: The two heating units and a temperature measuring unit are set as a group, and one temperature measuring unit is placed in the middle of the two heating units. Different temperature heating can be performed in a sequential order to meet the heating conditions of different temperatures for large and small wire diameters.

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