Butt joint device for bonding crystal bars
By designing a docking device for bonding crystal rods, the crystal rods are positioned and fixed using components such as a rotating base, clamping bracket, and limiting plate. This solves the problem of crystal wire misalignment during the bonding of short round rods, and improves the processing yield and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-02
- Publication Date
- 2026-04-03
AI Technical Summary
In existing technologies, the lack of suitable tooling for positioning during the bonding process of short round bars leads to abnormal crystal wire misalignment, increases the scrap rate, and affects processing efficiency and production capacity.
Design a docking device for bonding crystal rods, including a rotating base, a clamping bracket, a gripper, a dial indicator, and an L-shaped limiting plate. The clamping bracket and the limiting plate are used to position and fix the crystal rods, ensuring the stability of the crystal wire alignment and bonding process.
It reduces the scrap rate caused by poor bonding, improves the yield of crystal rods, avoids abnormal phenomena in the processing, such as bevels and arcs, and improves processing efficiency.
Smart Images
Figure CN224074686U_ABST
Abstract
Description
[Technical Field]
[0001] This utility model relates to the butt joint processing technology of single crystal silicon rods, and more particularly to a butt joint device for bonding crystal rods. [Background Technology]
[0002] In the production of monocrystalline silicon rods, the machining workshop mainly involves three processes: cutting, squaring, and polishing. Currently, the multi-head cutting machines, squaring machines, and polishing machines developed by various suppliers on the market all require rod lengths of ≥220mm for normal processing due to the limitations of the machine clamping devices. Even though some squaring machines can process rods as short as 150-200mm by adjusting the photoelectric sensor position and the limit soft limit position, restoring the original position after each adjustment takes more than 2 hours (excluding the normal processing time of the crystal rod), severely impacting workshop processing efficiency and capacity, making it counterproductive. Furthermore, based on the actual situation in the workshop, 80% of the short round rods are less than 200mm in length. This is mainly due to the following factors: 1. The electrical properties of some parts of the incoming monocrystalline silicon rod exceed the standard, and the abnormal parts need to be cut off. However, in most cases, after the abnormal parts are cut off, the good parts often cannot be processed normally because the rod length is <200mm, and they can only be scrapped; 2. After the round rod is cut off in the cutting process, it needs to be cut off again due to abnormalities such as chipping, cracks, and bevels. This also results in the round rod being too short to be processed and scrapped.
[0003] As the cost of silicon material continues to decline, most companies, facing increasingly lower profits, are forced to find ways to recycle short round bars that are finished products but too short to be considered waste, in order to reduce manufacturing costs. The most effective method is to glue these short round bars to a length that allows multi-head cutting machines, squaring machines, and grinding machines to process them normally, thus achieving efficient recycling.
[0004] However, current short round rod bonding relies entirely on manual application of two-component adhesive to the bonding surfaces, followed by manual alignment of the crystal wires and pressing to bond them. During the bonding process, misalignment of the crystal wires and abnormal misalignment of the bonding surfaces of double / triple-jointed crystal rods frequently occur, leading to increased defects and scrap rates in subsequent processes. The main reason for this is the lack of suitable tooling for positioning during the bonding process. Before the two-component adhesive has fully cured, the crystal rods may slide or shift, causing misalignment of the bonding surfaces. [Utility Model Content]
[0005] This utility model discloses a docking device for bonding crystal rods. The crystal rods remain in a fixed state from the start of bonding short round rods, through crystal wire alignment, bonding end, and until the adhesive is completely cured. This reduces the excessive scrap rate caused by poor bonding and avoids defective products caused by abnormalities such as bevels and large arc angles during processing.
[0006] To achieve the aforementioned objectives of this utility model, the technical solution adopted is as follows:
[0007] A docking device for bonding crystal rods includes a base, wherein a rotating shaft base for supporting the docking crystal rods and rotating circumferentially is mounted at the center of the top of the base.
[0008] The base of the rotating shaft platform is provided with at least three clamping brackets that are evenly distributed along the circumference and installed vertically.
[0009] Each clamping bracket is equipped with a gripper portion that is radially arranged along the docking crystal rod and initially pre-tightened and positioned on the side wall of the crystal rod after being radially moved under the drive of external force.
[0010] The base is also equipped with a dial indicator located between two clamping brackets, which is used to detect the coaxiality of the crystal rods on the rotating shaft base by synchronously rotating the crystal rods at the top of the crystal rods.
[0011] One of the clamping brackets is also equipped with an L-shaped limiting plate that limits and locks the crystal rod from the side according to the dial indicator test results and is used for bonding and positioning the crystal rod.
[0012] Preferably, the gripper portion includes a locking plate arranged along the axial direction of the docking ingot, two slide rods symmetrically installed on the upper and lower sides of the clamping bracket for the locking plate to slide radially along the docking ingot, and a hand-controlled drive wheel. The hand-controlled drive wheel is rotatably connected to the middle of the clamping bracket via a screw thread. The inner end of the screw connected to the hand-controlled drive wheel is rotatably connected to the locking plate. The hand-controlled drive wheel drives the locking plate to contact the side of the ingot under the guidance and positioning of the slide rod via the screw.
[0013] Preferably, the locking plate is further equipped with three sets of contact positioning wheels arranged along the axial direction of the docking crystal rod for rotating contact with the side of the crystal rod.
[0014] Preferably, the base is provided with a column for positioning and fixing the dial indicator, and a folding arm for adjusting and positioning the dial indicator is installed at the top of the column.
[0015] Preferably, the L-shaped limiting plate is locked and fixed to the clamping bracket by limiting screws.
[0016] The beneficial effects of this utility model are:
[0017] By using each gripper on the three sets of clamping brackets, the crystal rod sidewall is initially pre-tightened and positioned after radial transverse movement. Then, the coaxiality of the synchronously rotating docking crystal rods is checked using a dial indicator. Based on the dial indicator test results, the crystal rods are side-limited and locked using L-shaped limiting plates. This achieves positioning and fixation of the crystal rods throughout the entire process of short round rod bonding, from the start of bonding, crystal wire alignment, bonding end, and until the adhesive is completely cured. The crystal rods remain in a fixed state at all times, reducing the excessive scrap rate due to poor bonding and avoiding defects such as bevels and large arc angles during processing. This effectively improves the yield rate of subsequent processing of the docking crystal rods. [Attached Image Description]
[0018] Figure 1 This is a front-view three-dimensional structural schematic diagram of the present invention;
[0019] Figure 2 This is a side view of the three-dimensional structure of this utility model;
[0020] Figure 3 This is a rear-view three-dimensional structural diagram of the present invention.
Detailed Implementation Methods
[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0022] A mating device for bonding crystal rods, such as Figures 1 to 3 As shown, the device includes a base 1, with a rotating shaft base 2 at the center of the top of the base 1 for supporting the docking crystal rod and rotating circumferentially. Three clamping brackets 3 are evenly distributed circumferentially and vertically installed on the base 1. Each clamping bracket 3 is equipped with a gripper 4 arranged radially along the docking crystal rod and initially pre-tightened and positioned on the side wall of the crystal rod after radial lateral movement driven by manual external force. A dial indicator 5 is also installed on the top of the base 1 between two clamping brackets 3, used for coaxiality detection of the docking crystal rod on the rotating shaft base 2 by synchronous rotation. A column 6 is provided on the base 1 for positioning and fixing the dial indicator 5, and a folding arm 7 for adjusting and positioning the dial indicator 5 is installed at the top of the column 6. An L-shaped limiting plate 8 is also installed on one clamping bracket 3 for side-limiting and locking of the crystal rod according to the detection result of the dial indicator 5, and for bonding and positioning the docking crystal rod. The L-shaped limiting plate 8 is locked and fixed to one clamping bracket 3 by two limiting screws.
[0023] Continue as Figures 1 to 3 As shown, the gripper part 4 includes a locking plate 40 arranged along the axial direction of the docking crystal rod, two slide rods 41 symmetrically installed on the upper and lower sides of the clamping bracket 3 for sliding the locking plate 40 along the radial direction of the docking crystal rod, and a hand-controlled drive wheel 42. The locking plate 40 is also equipped with three sets of contact positioning wheels 43 arranged along the axial direction of the docking crystal rod for rotating contact with the side of the crystal rod. The hand-controlled drive wheel 42 is rotatably connected to the middle of the clamping bracket 3 by a screw thread. The inner end of the screw connected to the hand-controlled drive wheel 42 is rotatably connected to the locking plate 40. The hand-controlled drive wheel 42 drives the locking plate 40 to contact the side of the crystal rod under the guidance and positioning of the two slide rods 41 through the screw.
[0024] In use, loosen each contact positioning wheel 43 on the three gripper parts 4, and place the crystal rod into the rotating base 2 in the middle of the three clamping brackets 3 using the clamp. Adjust the distance of each locking plate 40 by using each hand-controlled drive wheel 42 on the three gripper parts 4, and simultaneously rotate the docked crystal rod by hand. Check the dial indicator 5 to adjust the concentricity of the docked crystal rod. When the concentricity of the docked crystal rod meets the requirements, push out the L-shaped limiting plate 8 radially, and lock and fix the L-shaped limiting plate 8 to the clamping bracket using two limiting screws. On the bracket 3, the L-shaped limiting plate 8 positions and fixes the crystal rods throughout the entire bonding process, from the start of the bonding process, the alignment of the crystal wires, the end of the bonding process, and until the adhesive is completely cured. This ensures that the crystal rods are always in a fixed state, reducing the excessive scrap rate caused by poor bonding and avoiding defects such as slant surfaces or large arc angles during processing. This effectively improves the yield rate of subsequent processing of the bonded crystal rods. Then, after the adhesive is fixed, one of the clamping claws 4 is loosened on one side, and finally the fixture is removed.
[0025] The above-described embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of implementation of the present utility model. Except for the cases listed in the specific embodiments, all equivalent changes made in accordance with the shape, structure and principle of the present utility model should be covered within the protection scope of the present utility model.
Claims
1. A docking device for wafer bonding, characterized by, It comprises a base, a rotating shaft base table is installed at the top center of the base for supporting and rotating the butt joint crystal bar in the circumferential direction; At least three clamping supports are installed on the base in the circumferential direction and vertically; Each clamping support is installed with a clamping jaw part arranged in the radial direction of the butt joint crystal bar and driven by external force to move in the radial direction and preliminarily pre-tighten and position the side wall of the crystal bar; A dial gauge is installed on the base between the two clamping supports for detecting the coaxiality of the top end of the crystal bar on the rotating shaft base table and the butt joint crystal bar by synchronous rotation; An L-shaped limiting plate is installed on one of the clamping supports for limiting and locking the side of the crystal bar and bonding and positioning the butt joint crystal bar according to the detection result of the dial gauge.
2. The apparatus according to claim 1, wherein The clamping jaw part comprises a locking plate arranged in the axial direction of the butt joint crystal bar, two slide rods symmetrically installed on the upper and lower sides of the clamping support for sliding the locking plate in the radial direction of the butt joint crystal bar, and a hand control driving wheel, the hand control driving wheel is connected to the middle part of the clamping support through a screw thread, the inner side end of the screw connected to the hand control driving wheel is rotationally connected to the locking plate, and the hand control driving wheel drives the locking plate to touch the side of the crystal bar under the guidance and positioning of the slide rod.
3. The apparatus according to claim 2, wherein Three sets of touch positioning rotating wheels are installed on the locking plate arranged in the axial direction of the butt joint crystal bar for rotating and touching the side of the crystal bar.
4. The apparatus for bonding of a crystal bar according to claim 1, wherein A stand is installed on the base for positioning and fixing the dial gauge, and a folding arm is installed at the top end of the stand for adjusting and positioning the dial gauge.
5. The apparatus for bonding of a crystal bar according to claim 1, wherein The L-shaped limiting plate is locked and fixed on the clamping support by a limiting screw.