Swing structure and wire welding machine

Abstract

The utility model belongs to the technical field of welding, and relates to a swing structure and a wire bonder, the swing structure comprises a rotating shaft, a swing body, a driving assembly and a monitoring assembly; the swinging body can swing around the rotating shaft under the action of the driving assembly, and an arc-shaped mounting surface is arranged on the tail end surface of the swinging body; the monitoring assembly comprises a grating ruler which is attached to the mounting surface; the driving assembly comprises a coil, the coil is fixed to the swing body, and a heat dissipation gap is formed between the coil and the mounting face. The tail end face of the swing body is provided with the arc-shaped mounting face, the grating ruler is fixed to the mounting face, parts do not need to be additionally arranged for placing the grating ruler, the structural design of the swing body can be simplified, and the motion inertia of the swing body is reduced; besides, a heat dissipation gap is formed between the coil and the mounting surface, so that enough space is formed around the coil and the grating ruler for air circulation, heat dissipation of the coil and the grating ruler is facilitated, and the situation that the measurement precision is affected due to the fact that scales of the grating ruler are changed due to high temperature is prevented.

Description

Technical Field

[0001] The present application relates to the field of welding technology, and more specifically, to a swing structure and a wire bonding machine. Background Art

[0002] A wire bonder is a device specially used for interconnecting semiconductor chips and metal wires in microelectronic packaging. A wire bonder generally includes a welding piece, an oscillating body, a stator and a coil. The oscillating body is driven by the stator and the coil to drive the welding piece to swing around the rotating axis. The swinging angle of the oscillating body directly affects the placement of the welding wire and the formation of the welding point, so it is necessary to monitor the swinging angle of the oscillating body.

[0003] Wire welding machines usually use grating ruler components to monitor the swing angle of the swing body. In order to mount the grating ruler on the swing body, the wire welding machine generally needs to add a fixed structure for fixing the grating ruler. The fixed structure is fixed on the swing body. The fixed structure increases the weight of the swing body, which is not conducive to reducing the movement inertia of the swing body. In addition, a certain amount of heat is generated when the coil is working, and the heat will be transferred to the grating ruler through the swing body, affecting the measurement accuracy and service life of the grating ruler. Utility Model Content

[0004] The technical problem to be solved by the embodiments of the present application is: in the prior art, a wire welding machine generally needs to add a fixed structure for fixing the grating ruler, and the fixed structure is fixed on the swing body. The fixed structure increases the weight of the swing body, which is not conducive to reducing the movement inertia of the swing body; in addition, a certain amount of heat will be generated when the motor coil is working, and the heat will be transferred to the grating ruler through the swing body, and affect the measurement accuracy and service life of the grating ruler.

[0005] In order to solve the above technical problems, the embodiment of the present application provides a swing structure, which adopts the following technical solution:

[0006] A swing structure comprises a rotating shaft, a swing body, a driving component and a monitoring component;

[0007] The swing body can swing around the rotating shaft under the action of the driving assembly, and an arc-shaped mounting surface is provided on the tail end surface of the swing body;

[0008] The monitoring component includes a grating ruler, and the grating ruler is attached to the mounting surface;

[0009] The driving assembly comprises a coil, the coil is fixed on the swing body, and a heat dissipation gap is provided between the coil and the mounting surface.

[0010] Furthermore, the oscillating body includes a first mounting seat and a second mounting seat connected to each other, the coil is fixed on the first mounting seat, and the mounting surface is arranged on a side of the second mounting seat away from the first mounting seat.

[0011] Furthermore, a mounting opening is provided on the first mounting seat, the coil is fixed in the mounting opening, and the heat dissipation gap is provided between the inner wall surface of the mounting opening close to the second mounting seat and the coil.

[0012] Furthermore, at least two first heat dissipation holes are provided on the first mounting base, and the first heat dissipation holes are distributed on the periphery of the coil.

[0013] Furthermore, the second mounting seat includes a mounting portion and a connecting portion, the connecting portion connects the mounting portion and the first mounting seat, the mounting surface is arranged on a side of the mounting portion away from the connecting portion, and a groove is formed between the mounting portion and the first mounting seat.

[0014] Furthermore, a second heat dissipation hole is provided on the mounting surface.

[0015] Furthermore, the rotating shaft, the oscillating body, the grating ruler and the coil are concentrically arranged.

[0016] Furthermore, the monitoring component also includes a reading head, which is arranged adjacent to the grating ruler, the reading head has a light-incoming surface facing the grating ruler, the grating ruler has a section, and the light-incoming surface is arranged parallel to the section.

[0017] Furthermore, the driving component also includes a first magnet and a second magnet, and the first magnet and the second magnet are symmetrically distributed on both sides of the coil. When power is supplied to the coil, the coil, the first magnet and the second magnet cooperate to generate a driving force, and the driving force acts on the swinging body to drive the swinging body to swing around the rotating shaft.

[0018] In order to solve the above technical problems, the embodiment of the present application further provides a wire bonding machine, which adopts the following technical solution:

[0019] A wire bonding machine comprises the swing structure as described above.

[0020] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0021] (1) The present application proposes that a mounting surface for mounting a grating ruler is provided on the tail end face of the swing body. The grating ruler is directly attached to the mounting surface without adding additional parts to place the grating ruler. This can simplify the structural design of the swing body, reduce the weight of the swing body, and further reduce the movement inertia of the swing body.

[0022] (2) The grating scale is set on the tail end face of the swing body. The tail end face has a large design space, and a mounting surface with a larger curvature and area can be designed according to needs to paste a wider and longer grating scale. The resulting arc grating scale has a larger curvature and can cover a larger angle range. In situations where larger angles need to be measured, the grating scale can provide more comprehensive data support.

[0023] (3) A heat dissipation gap is provided between the coil and the mounting surface. The heat dissipation gap allows sufficient space for air circulation around the coil and the grating scale on the mounting surface, which helps to dissipate heat from the coil and the grating scale. In addition, the heat dissipation gap can reduce the heat of the coil directly transferred to the mounting surface, which helps to reduce the temperature of the mounting surface and the grating scale, and prevent high temperature from causing the scale of the grating scale to change, affecting the measurement accuracy and service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the solutions in the present application or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a three-dimensional structural schematic diagram of the swing structure provided by the embodiment of the utility model;

[0026] Figure 2 It is an exploded schematic diagram of the swing structure provided by an embodiment of the utility model;

[0027] Figure 3 It is a side view of the components of the swing structure provided by the embodiment of the utility model;

[0028] Figure 4 yes Figure 3 A partial enlarged view of the middle A;

[0029] Figure 5 It is a schematic diagram of the three-dimensional structure of the swing body provided by the embodiment of the utility model.

[0030] Reference numerals:

[0031] 100. Swinging structure; 1. Swinging body; 11. Mounting surface; 12. First mounting seat; 121. Mounting port; 122. First heat dissipation hole; 13. Second mounting seat; 131. Mounting portion; 132. Connecting portion; 1321. Slot; 2. Driving assembly; 21. Coil; 22. First magnet; 23. Second magnet; 3. Monitoring assembly; 31. Grating scale; 32. Reading head; 321. Light-incoming surface; 4. Heat dissipation gap; 5. Welding assembly; 51. Transducer; 52. Wire clamp. DETAILED DESCRIPTION

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0033] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0034] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0035] Combine the following Figures 1 to 5 , describing an embodiment of the utility model.

[0036] Please refer to Figure 1 and Figure 2As shown, the swing structure 100 of the present application includes a rotating shaft (not shown in the figure), a swing body 1, a driving component 2 and a monitoring component 3. The swing body 1 can swing around the rotating shaft under the action of the driving component 2. An arc-shaped mounting surface 11 is provided on the tail end surface of the swing body 1. The monitoring component 3 is used to monitor the swing angle of the swing body 1. The monitoring component 3 includes a grating ruler 31, and the grating ruler 31 is attached to the mounting surface 11. The driving component 2 includes a coil 21, and the coil 21 is fixed on the swing body 1. A heat dissipation gap 4 is provided between the coil 21 and the mounting surface 11. In this embodiment, the specific shapes of the swing body 1, the coil 21 and the grating ruler 31 are not limited. Preferably, the swing body 1, the coil 21 and the grating ruler 31 are all axisymmetric structures. The axisymmetric structure can reduce the unstable swing phenomenon caused by the center of gravity offset of the swing body 1, the coil 21 and the grating ruler 31. The curvature radius and curvature of the arc-shaped mounting surface 11 are not limited, and can be flexibly limited according to measurement requirements.

[0037] In this embodiment, on the one hand, a mounting surface 11 for mounting a grating scale 31 is provided on the tail end face of the swing body 1. The grating scale 31 is directly attached to the mounting surface 11, and no additional parts are required to place the grating scale 31. This can simplify the structural design of the swing body 1, reduce the weight of the swing body 1, and reduce the motion inertia of the swing body 1. On the other hand, the grating scale 31 can adopt a low-cost linear grating scale 31. The linear grating scale 31 is mounted on the surface of the arc-shaped mounting surface 11 by gluing. After the grating scale 31 is attached to the arc-shaped mounting surface 11, the shape of the grating scale 31 changes from a straight line to an arc to replace the more expensive circular grating or sector grating. While ensuring the measurement requirements, the cost of the grating scale 31 can be saved, and the replacement and maintenance of the grating scale 31 are also more convenient. In addition, the grating scale 31 is arranged on the tail end face of the swing body 1. The tail end face has a large design space, and a mounting surface 11 with a larger curvature and area can be designed according to needs to paste a wider and longer grating scale 31, so that the final arc grating scale 31 has a larger curvature and can cover a larger angle range. In situations where a larger angle needs to be measured, the grating scale 31 can provide more comprehensive data support.

[0038] In this embodiment, a heat dissipation gap 4 is provided between the coil 21 and the mounting surface 11. The heat dissipation gap 4 allows sufficient space for air circulation around the coil 21 and the grating scale 31 on the mounting surface 11, which helps to dissipate heat from the coil 21 and the grating scale 31. In addition, the heat dissipation gap 4 can reduce the heat of the coil 21 directly transferred to the mounting surface 11, which is beneficial to lowering the temperature of the mounting surface 11 and the grating scale 31, and preventing high temperature from causing the scale of the grating scale 31 to change, thereby affecting the measurement accuracy.

[0039] In one embodiment, please refer to Figure 3As shown. The swing body 1 includes a first mounting seat 12 and a second mounting seat 13 connected to each other, the coil 21 is fixed on the first mounting seat 12, and the mounting surface 11 is arranged on the side of the second mounting seat 13 away from the first mounting seat 12. The fixing method of the coil 21 is not limited, and the coil 21 can be fixed to the first mounting seat 12 by welding, riveting, bonding, fastener connection, etc. In this embodiment, the mounting surface 11 is arranged on the side of the second mounting seat 13 away from the first mounting seat 12, which can increase the distance between the mounting surface 11 and the coil 21, and reduce the heat of the coil 21 transferred to the coil 21 on the mounting surface 11.

[0040] In one embodiment, please refer to Figure 3 and Figure 5 The first mounting seat 12 is provided with a mounting opening 121 , the coil 21 is fixed in the mounting opening 121 , and a heat dissipation gap 4 is provided between the mounting opening 121 and the inner wall surface of the second mounting seat 13 and the coil 21 .

[0041] Furthermore, at least two first heat dissipation holes 122 are provided on the first mounting base 12, and the first heat dissipation holes 122 are distributed on the outer periphery of the coil 21. The first heat dissipation holes 122 allow heat to escape from the inside of the swing body 1, while increasing the air circulation and heat dissipation area between the swing body 1 and the coil 21, thereby improving the heat dissipation efficiency of the swing body 1.

[0042] In one embodiment, please refer to Figures 1 to 5 As shown, the second mounting seat 13 includes a mounting portion 131 and a connecting portion 132, the connecting portion 132 is used to connect the mounting portion 131 and the first mounting seat 12, the mounting surface 11 is arranged on a side of the mounting portion 131 away from the connecting portion 132, and a slot 1321 is formed between the connecting portion 132 and the first mounting seat 12. On the one hand, the slot 1321 can reduce the weight of the swing body 1 and reduce the movement inertia of the swing body 1; on the other hand, the slot 1321 can reduce the contact area between the connecting portion 132 and the first mounting seat 12, thereby reducing the heat transfer between the connecting portion 132 and the first mounting seat 12.

[0043] In an embodiment not shown in the figure, a second heat dissipation hole is provided on the mounting surface 11. The second heat dissipation hole allows heat to escape from the inside of the mounting surface 11, while increasing the air circulation and heat dissipation area of ​​the mounting surface 11, improving the heat dissipation efficiency of the grating scale 31 on the mounting surface 11, and preventing the grating scale 31 from affecting the measurement accuracy and service life due to excessive temperature.

[0044] In an embodiment not shown in the figure, the rotating shaft, the swing body 1, the grating scale 31 and the coil 21 are concentrically arranged so that the center of mass of the assembled swing body 1 coincides with or is close to the center of the rotating shaft, which helps to reduce the vibration and shaking caused by the imbalance between the rotating shaft, the swing body 1, the grating scale 31 and the coil 21, thereby improving the movement accuracy, reliability and stability of the swing structure 100.

[0045] In one embodiment, please refer to Figures 1 to 4 As shown, the monitoring assembly 3 further includes a reading head 32, which is disposed adjacent to the grating ruler 31, and has a light-incoming surface 321 facing the grating ruler 31. The arc grating ruler 31 has a cut surface, and the light-incoming surface 321 is disposed parallel to the cut surface. In this embodiment, the reading head 32 is fixed, and the reading head 32 cooperates with the grating ruler 31 to detect the swing angle of the swing body 1. Specifically, the grating ruler 31 is engraved with grating lines with equal intervals, and a light source (not shown in the figure) and a photodetector (not shown in the figure) are arranged inside the reading head 32. The light emitted by the light source is irradiated onto the grating ruler 31 through the light-inlet surface 321, and the grating lines will diffract and interfere with the light. When the swing body 1 swings, the grating ruler 31 also swings accordingly, and the relative position between the grating lines and the reading head 32 changes, causing the diffraction and interference effects of the light after passing through the grating lines to also change. These changes are sensed by the photodetector and converted into electrical signal output. The frequency, phase and other parameters of the electrical signal are related to the swing angle and speed of the swing body 1. By processing the electrical signal output by the photodetector, information related to the swing angle of the swing body 1 can be obtained.

[0046] In this embodiment, the arc grating ruler 31 has a cut surface, and the light-entering surface 321 is arranged parallel to the cut surface. The light-entering surface 321 is arranged parallel to the cut surface, which can reduce errors caused by angle deviation or light distortion, thereby improving the measurement accuracy; on the other hand, it helps to optimize the transmission of optical or electrical signals, and the reflection and transmission of light on parallel surfaces are more stable and consistent, which can reduce signal loss and interference, and improve the measurement accuracy and reliability.

[0047] In one embodiment, please refer to Figures 1 to 3 As shown, the swing structure 100 further includes a welding assembly 5, which is fixed on the swing body 1, and the swing body 1 drives the welding assembly 5 to swing around the rotation axis. In this embodiment, the welding assembly 5 includes components such as a transducer 51 and a wire clamp 52, and the swing body 1 can drive the welding assembly 5 to accurately transfer the welding wire to the workpiece to be welded, and form a welding point at a specific position of the workpiece.

[0048] In one embodiment, please refer to Figure 1 and Figure 2As shown, the driving assembly 2 also includes a first magnet 22 and a second magnet 23, and the first magnet 22 and the second magnet 23 are symmetrically distributed on both sides of the coil 21. When the coil 21 is energized, the coil 21, the first magnet 22 and the second magnet 23 cooperate to generate a driving force, and the driving force acts on the swing body 1 to drive the swing body 1 to swing around the rotation axis. Specifically, when the coil 21 is energized, a magnetic field is formed between the first magnet 22 and the second magnet 23, and the coil 21 is located in the magnetic field. The coil 21 cooperates with the magnetic field to generate a driving force, and the driving force acts on the swing body 1 to drive the swing body 1 to swing around the rotation axis. In this embodiment, the first magnet 22 and the second magnet 23 are symmetrically distributed on both sides of the coil 21 to generate a uniform magnetic field. The uniform magnetic field distribution helps the current in the coil 21 to remain stable, thereby making the generation of the driving force and the swing of the swing body 1 more stable.

[0049] According to an embodiment of the present invention, a wire bonding machine (not shown in the figure) is also provided, comprising the swing structure 100 as described above.

[0050] In this embodiment, the wire bonding machine is provided with an arc-shaped mounting surface 11 on the tail end face of the swing body 1, and the monitoring component 3 is used to monitor the swing angle of the swing body 1. The monitoring component 3 includes a grating ruler 31, and the grating ruler 31 is attached to the mounting surface 11. The driving component 2 includes a coil 21, and the coil 21 is fixed on the swing body 1. A heat dissipation gap 4 is provided between the coil 21 and the mounting surface 11. On the one hand, a mounting surface 11 for mounting the grating ruler 31 is provided on the tail end face of the swing body 1, and the grating ruler 31 is directly attached to the mounting surface 11, and there is no need to add parts to place the grating ruler 31, which can simplify the structural design of the swing body 1, reduce the weight of the swing body 1, and reduce the movement inertia of the swing body 1. On the other hand, a heat dissipation gap 4 is provided between the coil 21 and the mounting surface 11. The heat dissipation gap 4 allows sufficient space for air circulation around the coil 21 and the grating scale 31 on the mounting surface 11, which helps to dissipate heat from the coil 21 and the grating scale 31. In addition, the heat dissipation gap 4 can reduce the direct transfer of heat from the coil 21 to the mounting surface 11, which is beneficial to lowering the temperature of the mounting surface 11 and the grating scale 31, and preventing high temperature from causing the scale of the grating scale 31 to change, thereby affecting the measurement accuracy.

[0051] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. A swing structure, characterized in that: It includes a rotating shaft, a swinging body, a driving component and a monitoring component; The swing body can swing around the rotating shaft under the action of the driving assembly, and an arc-shaped mounting surface is provided on the tail end surface of the swing body; The monitoring component includes a grating ruler, and the grating ruler is attached to the mounting surface; The driving assembly comprises a coil, the coil is fixed on the swing body, and a heat dissipation gap is provided between the coil and the mounting surface.

2. The swing structure according to claim 1, characterized in that: The oscillating body comprises a first mounting seat and a second mounting seat connected to each other, the coil is fixed on the first mounting seat, and the mounting surface is arranged on a side of the second mounting seat away from the first mounting seat.

3. The swing structure according to claim 2, characterized in that: The first mounting seat is provided with a mounting opening, the coil is fixed in the mounting opening, and the heat dissipation gap is provided between the inner wall surface of the mounting opening close to the second mounting seat and the coil.

4. The swing structure according to claim 3, characterized in that: The first mounting base is also provided with at least two first heat dissipation holes, and the first heat dissipation holes are distributed around the periphery of the coil.

5. The swing structure according to claim 4, characterized in that: The second mounting seat includes a mounting portion and a connecting portion, the connecting portion connects the mounting portion and the first mounting seat, the mounting surface is arranged on a side of the mounting portion away from the connecting portion, and a groove is formed between the mounting portion and the first mounting seat.

6. The swing structure according to claim 5, characterized in that: The mounting surface is provided with a second heat dissipation hole.

7. The swing structure according to any one of claims 1 to 5, characterized in that: The rotating shaft, the swinging body, the grating ruler and the coil are arranged concentrically.

8. The swing structure according to claim 7, characterized in that: The monitoring component also includes a reading head, which is arranged adjacent to the grating ruler. The reading head has a light-incoming surface facing the grating ruler. The grating ruler has a section surface, and the light-incoming surface is arranged parallel to the section surface.

9. The swing structure according to claim 8, characterized in that: The driving component also includes a first magnet and a second magnet, and the first magnet and the second magnet are symmetrically distributed on both sides of the coil. When power is supplied to the coil, the coil, the first magnet and the second magnet cooperate to generate a driving force, and the driving force acts on the swinging body to drive the swinging body to swing around the rotating shaft.

10. A wire bonding machine, characterized in that: The invention comprises the swing structure according to any one of claims 1 to 9.

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