CN107275243B - Welding chopper and preparation method thereof - Google Patents
Welding chopper and preparation method thereof Download PDFInfo
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- CN107275243B CN107275243B CN201710419414.1A CN201710419414A CN107275243B CN 107275243 B CN107275243 B CN 107275243B CN 201710419414 A CN201710419414 A CN 201710419414A CN 107275243 B CN107275243 B CN 107275243B
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- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/74—Apparatus for manufacturing arrangements for connecting or disconnecting semiconductor or solid-state bodies
- H01L24/78—Apparatus for connecting with wire connectors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
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- B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
- B28B23/043—Wire anchoring or tensioning means for the reinforcements
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- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
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- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
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- H01L2224/7825—Means for applying energy, e.g. heating means
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Abstract
The invention relates to a welding chopper, a connecting part and a chopper part connected with the connecting part, wherein a passage is formed in the middle part of the welding chopper, the passage extends from the top end of the connecting part to the bottom end of the chopper part, and the passage is communicated with the connecting part and the chopper part; the passage comprises a cylindrical groove and a conical groove communicated with the cylindrical groove, and the diameter of the cylindrical groove is larger than that of the conical groove. According to the free attenuation characteristic of ultrasonic waves, the passage is designed to be formed by connecting a cylindrical groove and a conical groove, so that the mass proportion of the cutter head is improved, the ultrasonic transmission damping is reduced, the ultrasonic transmission efficiency is improved, and the energy loss is reduced; the cutter opening part is not provided with a groove capable of storing residual materials, so that the problem that the service life of the welding chopper is influenced by residual metal in the welding process is solved; the connecting part is coupled with the knife mouth part, and the middle part of the connecting part is not provided with a transition section, so that the connecting part can be integrally formed and prepared by an injection molding and dry pressing molding preparation method, and the production is easy.
Description
Technical Field
The invention relates to the technical field of welding tools for wires and semiconductor equipment, in particular to a welding chopper and a preparation method thereof.
Background
There are three common types of conventional weld-on cleavers, the first of which, such as the weld-on cleaver 10 of FIG. 1, has a cylindrical body portion and a tapered portion, an axial passageway extending from the trailing end of the cleaver to the distal end, and a wire passing through the axial passageway for welding at the distal end. Or as with the weld-chopper 20 of fig. 2, the weld-chopper is a three-segment coupled structure including a first cylindrical portion having a first diameter, a second cylindrical portion having a diameter less than the first diameter, a tapered portion coupled to the second cylindrical portion, an axial passageway extending from a trailing end to a distal end of the chopper, and a wire bonded at the distal end through the axial passageway. Or as the welding riving knife 30 of fig. 3, the transmission efficiency of the ultrasonic energy is improved by designing a plurality of grooves at the inner chamfer. The above welding chopper has the following defects: 1) the influence of the structure on the conduction efficiency of the ultrasonic energy is not fully considered, so that the conduction efficiency of the ultrasonic energy is lower, and the energy consumption is increased; 2) the processing difficulty of the three-section coupling structure is high; 3) the ultrasonic transmission efficiency of the plurality of grooves designed at the inner chamfer is not obviously improved; 4) metal residues are serious in the groove structure welding process, and the service life of the chopper is greatly reduced; 5) the width and depth of the groove are difficult to control, and the processing means is imperfect.
Disclosure of Invention
Based on the welding chopper and the preparation method thereof, the welding chopper has the characteristics of easiness in processing, reasonable design of a channel structure, reduction in damping, improvement on ultrasonic transmission efficiency and difficulty in metal residue on a knife mouth.
In order to realize the purpose of the invention, the invention adopts the following technical scheme:
a welding chopper comprises a connecting part and a chopper part connected with the connecting part, wherein a passage is formed in the middle of the welding chopper, the passage extends from the top end of the connecting part to the bottom end of the chopper part, and the passage is communicated with the connecting part and the chopper part; the passage comprises a cylindrical groove and a conical groove communicated with the cylindrical groove.
According to the free attenuation characteristic of ultrasonic waves, the path is designed to be formed by connecting the cylindrical groove and the conical groove, so that the mass proportion of the cutter head is improved, the damping of ultrasonic transmission is reduced, the ultrasonic transmission efficiency is improved, and the energy loss is reduced; the cutter opening part is not provided with a groove capable of storing residual materials, so that the problem that the service life of the welding chopper is influenced by residual metal in the welding process is solved; the connecting part is coupled with the knife mouth part, the transition section is not arranged in the middle, the knife mouth part and the knife mouth part can be integrally formed and prepared by an injection molding and dry pressing forming preparation method, the processing condition is simple, and the production is easy.
In one embodiment, the connecting portion is cylindrical and the nose portion is conical.
In one embodiment, the diameter of the cylindrical groove is larger than the diameter of the end of the tapered groove connecting the cylindrical groove.
In one embodiment, the longitudinal section of the joint of the cylindrical groove and the conical groove is T-shaped.
In one embodiment, the width H of the shoulder of the T-shape is 0.05-0.3 mm.
In one embodiment, the diameter of the cylindrical groove is equal to the diameter of the end of the tapered groove that connects the cylindrical groove.
In one embodiment, the height difference h between the connecting point of the connecting part and the cutter nozzle part and the connecting point of the cylindrical groove and the conical groove along the extending direction of the shaft center is 0.7-1.0 mm.
A welding chopper comprises a connecting part and a cutter opening part connected with the connecting part, wherein a passage is formed in the middle part of the welding chopper, the passage extends from the top end of the connecting part to the bottom end of the cutter opening part, the passage is communicated with the centers of the connecting part and the cutter opening part, and the passage is of a continuous conical structure.
A preparation method of a welding chopper comprises the following steps:
step 1: weighing enough ceramic powder, adding the ceramic powder into an internal mixer for stirring and heating, wherein the heating temperature is 190-210 ℃;
step 2: adding polyethylene and polypropylene binder components, then mixing by an internal mixer at the mixing temperature of 185-200 ℃ and the rotor speed of 10-13 r/min, and stirring for 116-125min to obtain a mixed material;
and step 3: taking out the mixed material, preparing a feed for injection molding through a single-screw granulator, and injection molding the feed into a welding chopper green body;
and 4, step 4: and (3) placing the green welding riving knife blank in a sintering furnace, heating the temperature in the furnace from room temperature to 600 ℃ under the protection of nitrogen atmosphere, heating to 1450 ℃, keeping the temperature at 1450 ℃ for 180min, and heating at the speed of 3.5 ℃/min to obtain a finished welding riving knife product.
A method for preparing a welding chopper by adopting a dry pressing forming method comprises the following steps:
a preparation stage: the shaping wire sequentially passes through the clamping mechanism, the die plate, the male die, a die cavity formed by butting the left half die and the right half die and the lower die plate, and the end part of the shaping wire penetrating out of the lower die plate is connected to the wire drawing mechanism;
a charging stage: adding sufficient ceramic powder into the die cavity;
and (3) forming: clamping and locking the shaping wire by the clamping mechanism, then clamping and tensioning the shaping wire by the wire drawing mechanism to enable the shaping wire to be in a tensioned state, ensuring the verticality and concentricity of an inner hole after the blank body is formed, and finally pressing the die plate and the male die in place to complete the forming of the welding chopper blank body;
and (3) demolding: and separating the left half die and the right half die left and right, wherein the separation width is larger than the diameter size of the welding chopper blank, then loosening the clamping mechanism, and continuously pulling the wire drawing mechanism to drive the welding chopper blank to be separated from the die cavity.
Drawings
FIG. 1 is a schematic view of a weld chopper of comparative example 1;
FIG. 2 is a schematic view of a weld chopper of comparative example 2;
FIG. 3 is a schematic view of a weld chopper of comparative example 3;
FIG. 4 is a schematic view of a weld chopper in accordance with a first embodiment of the present invention;
FIG. 5 is a cross-sectional view of the weld riving knife of FIG. 4;
FIG. 6 is an enlarged schematic view of portion A of the weld chopper of FIG. 5;
FIG. 7 is a cross-sectional view of a weld chopper in accordance with a second embodiment of the present invention;
FIG. 8 is a cross-sectional view of a third embodiment of the weld chopper of the present invention;
FIG. 9 is a schematic view of a dry-pressing apparatus used to make a third embodiment of a weld-chopper;
FIG. 10 is a graph of laser vibration measurements for each weld chopper.
Detailed Description
In order that the invention may be more fully understood, reference will now be made to the following description. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Example 1
Referring to fig. 4 to 6, a welding chopper 40 according to a first embodiment of the present invention includes a connecting portion 41 and a knife tip portion 42 connected to the connecting portion 41, a passage 43 is separately formed in a middle portion of the welding chopper 40, the passage 43 extends from a top end of the connecting portion 41 to a bottom end of the knife tip portion 42, and the passage 43 communicates centers of the connecting portion 41 and the knife tip portion 42, so that ultrasonic waves can be transmitted from the top end of the connecting portion 41 to the bottom end of the knife tip portion 42.
Further, the connecting portion 41 has a cylindrical shape to connect the ultrasonic transducer, and the nozzle portion 42 has a conical shape.
In this embodiment, the passage 43 includes a cylindrical groove 411 and a tapered groove 412 communicating with the cylindrical groove 411, a diameter of the cylindrical groove 411 is larger than a diameter of an end of the tapered groove 412 connecting with the cylindrical groove 411, and a longitudinal section of a connection portion between the cylindrical groove 411 and the tapered groove 412 is T-shaped.
Preferably, the width H of the shoulder of the T-shape is 0.1mm, that is, the diameter of the cylindrical slot 411 is 0.2mm larger than the diameter of the largest end of the tapered slot 412, so that a proper mass ratio between the tool bit portion 42 and the connecting portion 41 is achieved, and a good vibration transmission effect and a good ultrasonic transmission efficiency are achieved in the ultrasonic welding. In practical applications, the width H of the side portion of the T-shape may be any width of 0.05mm, 0.08mm, 0.25mm, or 0.3mm, or 0.05-0.3mm, which can achieve the same effect as the present embodiment.
In the welding chopper 40 of the embodiment, the passage 43 is formed by connecting the cylindrical groove 411 and the tapered groove 412 according to the free attenuation characteristic of the ultrasonic wave, so that the connecting part 41 has lighter weight compared with the cylindrical main body part of the conventional welding chopper, the mass proportion of the chopper part 42 is improved, and the damping of the ultrasonic transmission is reduced through the structure that the upper part of the passage 43 is wider and the lower part of the passage 43 is narrower, thereby reducing the energy loss and improving the ultrasonic transmission efficiency.
The welded riving knife 40 is manufactured by an injection molding method and comprises the following steps:
step 1: weighing sufficient ZTA ceramic powder, adding into an internal mixer, stirring and heating at 200 deg.C;
step 2: adding the components of the binder, namely polyethylene and polypropylene, mixing by using an internal mixer at 190 ℃ so that the binder has good bonding effect, stirring at the rotor speed of 10 r/min for 120min to uniformly mix the components to obtain a mixed material;
and step 3: taking out the mixed material, preparing a feed for injection molding through a single-screw granulator, and injection molding the feed into a welding chopper green body;
and 4, step 4: and (3) placing the green blank of the welding chopper in a sintering furnace, raising the temperature in the furnace from room temperature to 600 ℃ under the protection of nitrogen atmosphere, raising the temperature to 1450 ℃, keeping the temperature of 1450 ℃ for 180min, and raising the temperature at a speed of 3.5 ℃/min, so that the ZTA ceramic is uniformly sintered, the occurrence of poor conditions such as cracking and the like is avoided, and the structural design of the welding chopper in the embodiment is followed. And obtaining a finished product of the welding chopper 40 after sintering.
In the manufacturing method of the welding riving knife 40, the connecting part 41 and the knife mouth part 42 are integrally formed, the structure of the passage 43 is formed together with the shapes of the connecting part 41 and the knife mouth part 42 in an injection molding machine, the process is simple, the control is easy, the structural design of the welding riving knife 410 is well followed, and the forming effect is good.
Example 2
Referring to fig. 4 and 7, the connecting portion 41 and the knife tip portion 42 of the welding riving knife 420 of the present embodiment have the same external shape and structure as the welding riving knife 40 of the embodiment 1. The difference lies in that: the passage 43 of this embodiment includes a cylindrical groove 421 and a tapered groove 422 communicating with the cylindrical groove 421, the diameter of the cylindrical groove 421 is equal to the diameter of the end of the tapered groove 422 connecting with the cylindrical groove 421, the cylindrical groove 421 is coupled with the tapered groove 422, and the connection is an arc-shaped surface. The passage 43 extends from the top end of the connecting portion 41 to the bottom end of the nozzle portion 42, and the passage 43 communicates the connecting portion 41 and the nozzle portion 42.
Further, the height difference h between the connecting point of the connecting portion 41 and the nozzle portion 42 and the connecting point of the cylindrical groove 421 and the tapered groove 422 in the axial extending direction is 0.8mm, and the cylindrical groove 421 minus part of the weight of the nozzle portion 42 achieves a suitable mass specific gravity between the nozzle portion 42 and the connecting portion 41, so as to achieve a good vibration transmission effect in ultrasonic welding. In practical applications, the height difference h between the connection point of the connecting portion 41 and the nozzle portion 42 and the connection point of the cylindrical groove 421 and the tapered groove 422 along the extending direction of the axis may be any value of 0.7mm, 0.75mm, 0.9mm, or 1.0mm, or 0.7-1.0mm, which can achieve the same effect as the present embodiment.
The welding chopper 420 is manufactured by an injection molding method, and comprises the following steps:
step 1: weighing sufficient ZTA ceramic powder, adding into an internal mixer, stirring and heating at 205 deg.C;
step 2: adding binder components polyethylene and polypropylene, mixing by an internal mixer at 190 ℃ and at a rotor speed of 13 r/min for 125min to obtain a mixed material;
and step 3: taking out the mixed material, preparing a feed for injection molding through a single-screw granulator, and injection molding the feed into a welding chopper green body;
and 4, step 4: and (3) placing the green welding riving knife blank in a sintering furnace, heating the temperature in the furnace from room temperature to 600 ℃ under the protection of nitrogen atmosphere, heating to 1450 ℃, keeping the temperature at 1450 ℃ for 180min, and heating at the speed of 3.5 ℃/min to obtain a finished welding riving knife product.
Example 3
Referring to fig. 4 and 8, the connecting portion 41 and the knife edge portion 42 of the welding riving knife 430 of the present embodiment have the same external configuration as the welding riving knife 40 of the embodiment 1. The difference lies in that: the passage 43 of the welding riving knife 430 of the present embodiment communicates with the center of the connecting portion 41 and the knife tip portion 42, and the passage 43 has a continuous tapered structure. The passage 43 extends from the top end of the connecting portion 41 to the bottom end of the snout portion 42.
The welded riving knife 430 is manufactured by a dry pressing method, and the dry pressing device 50 is shown in fig. 8, and the manufacturing method includes the following steps:
a preparation stage: the shaping wire 51 sequentially passes through a clamping mechanism 52, a die plate 53, a male die 54, a die cavity 56 formed by butting a left half die 55a and a right half die 55b, and a lower die plate 55, and the end part of the shaping wire penetrating out of the lower die plate 55 is connected to a wire drawing mechanism 57;
a charging stage: adding a sufficient amount of ceramic powder to the mold cavity 56;
and (3) forming: the clamping mechanism 52 clamps and locks the shaping wire 51, then the wire drawing mechanism 57 clamps and tightens the shaping wire 51 to keep the shaping wire 51 in a tightened state, so as to ensure the verticality and the concentricity of the inner hole of the formed blank, and finally the die plate 53 and the male die 54 are pressed down to the right position to complete the forming of the welding chopper blank;
and (3) demolding: and separating the left half die 55a and the right half die 55b left and right, wherein the separation width is larger than the diameter size of the welding chopper blank, then loosening the clamping mechanism, and continuously pulling the wire drawing mechanism to drive the welding chopper blank to be separated from the die cavity 56.
Welding chopper performance test
The welded chopper 10 in fig. 1 is used as a comparative example 1, the welded chopper 20 in fig. 2 is used as a comparative example 2, and the welded chopper 30 in fig. 3 is used as a comparative example 3, and it should be noted that the welded chopper 30 in fig. 3 has the same external structure as the welded chopper 10 in fig. 1. The amplitudes were measured using a laser doppler vibrometer for comparative examples 1 to 3 and examples 1 to 3, respectively.
The test adopts the laser interference principle to measure the speed and the amplitude of each unit of a vibrating object, the laser Doppler vibration meter comprises a camera system, a scanning system and an optical sensor, a laser beam of the optical sensor is vertically guided to a vibrating welding chopper, the laser beam is reflected and detected by the sensor, and an electric signal in a vibrating meter is demodulated to obtain the vibration amplitude. The test results are shown in fig. 10, which is a relationship between the amplitude of the ultrasonic vibration at any point in the ultrasonic transfer welding chopper and the distance from the point to the tip, and it can be seen that the amplitude of the tip of comparative examples 2, 3 and examples 1 to 3 is greater than that of the conventional chopper of comparative example 1, and the amplitudes of examples 1 to 3 are better than those of comparative examples 2 and 3.
Table 1 shows test data of the first pad thrust, the ball diameter, the ultrasonic energy (USG) and the bonding pressure of each bonding chopper, and it can be seen that, in the test results of the bonding results under the same bonding pressure, the first pad thrust and the ball diameter are similar, but the ultrasonic energy required in examples 1 to 3 is less than 50% of that required in comparative example 1, which is also a significant advantage compared with the results in comparative examples 2 and 3, and the results in examples 1 to 3 are stable, which indicates that a higher quality bonding result can be achieved with a lower energy requirement, and the use efficiency of the ultrasonic energy is effectively improved.
TABLE 1
In summary, in the welding riving knife of embodiments 1 to 3, the passage 43 is designed to be formed by connecting the cylindrical grooves 411 and 421 and the tapered grooves 412 and 422, or the passage 43 adopts a continuous tapered structure, so that the connecting portion 41 has a lighter weight compared with the cylindrical main body portion of the existing welding riving knife, the mass proportion of the knife edge portion 42 is improved, the amplitude of the welding riving knife in the ultrasonic wave is better, and the three designs effectively reduce the damping of the ultrasonic wave transmission and improve the ultrasonic wave transmission efficiency. The cutter mouth part 42 of the welding chopper is not provided with a groove capable of storing residual materials, so that the problem that the service life of the welding chopper is influenced by metal residues in the welding process is solved. The connecting part 41 is coupled with the knife mouth part 42, a transition section is not arranged in the middle, the knife mouth part and the knife mouth part can be integrally formed and manufactured by an injection molding and dry pressing forming manufacturing method, the processing condition is simple, the structural design of the welding chopper is followed, and a good forming effect is obtained.
It should be noted that the welding wedges 410 and 420 of the embodiments 1 and 2 can also be prepared by the dry pressing method described in the embodiment 3, and the welding wedge 430 of the embodiment 3 can also be prepared by the injection molding method described in the embodiment 1, and the good molding effect can also be obtained.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. A welding chopper is characterized by comprising a connecting part and a chopper part connected with the connecting part, wherein a passage is formed in the middle part of the welding chopper, the passage extends from the top end of the connecting part to the bottom end of the chopper part, and the passage is communicated with the connecting part and the chopper part; the passage comprises a cylindrical groove and a conical groove connected with the cylindrical groove; the diameter of the conical groove is gradually reduced along the direction far away from the cylindrical groove to form a cone shape; the connecting part and the tool bit part are integrally formed; the diameter of the cylindrical groove is larger than that of one end, connected with the cylindrical groove, of the conical groove.
2. The weld chopper of claim 1, wherein: the connecting part is cylindrical, and the hilt part is conical.
3. The weld chopper of claim 1, wherein: the longitudinal section of the joint of the cylindrical groove and the conical groove is T-shaped.
4. The weld chopper of claim 3, wherein: the width H of the shoulder part of the T shape is 0.05-0.3 mm.
5. A welding chopper is characterized in that: the welding chopper comprises a connecting part and a knife edge part connected with the connecting part, wherein a passage is formed in the middle part of the welding chopper, the passage extends from the top end of the connecting part to the bottom end of the knife edge part, and the passage is communicated with the connecting part and the knife edge part; the passage comprises a cylindrical groove and a conical groove connected with the cylindrical groove; the diameter of the conical groove is gradually reduced along the direction far away from the cylindrical groove to form a cone shape; the connecting part and the tool bit part are integrally formed; the diameter of the cylindrical groove is equal to the diameter of one end, connected with the cylindrical groove, of the conical groove; the height difference h between the connecting point of the connecting part and the cutter nozzle part and the connecting point of the cylindrical groove and the conical groove along the extending direction of the axis is 0.7-1.0 mm.
6. A method of manufacturing a welded riving knife for use in manufacturing the welded riving knife of any one of claims 1-5, the method comprising: the method comprises the following steps:
step 1: weighing enough ceramic powder, adding the ceramic powder into an internal mixer for stirring and heating, wherein the heating temperature is 190-210 ℃;
step 2: adding polyethylene and polypropylene binder components, then mixing by an internal mixer at the mixing temperature of 185-200 ℃ and the rotor speed of 10-13 r/min, and stirring for 116-125min to obtain a mixed material;
and step 3: taking out the mixed material, preparing a feed for injection molding through a single-screw granulator, and injection molding the feed into a welding chopper green body;
and 4, step 4: and (3) placing the green welding riving knife blank in a sintering furnace, heating the temperature in the furnace from room temperature to 600 ℃ under the protection of nitrogen atmosphere, heating to 1450 ℃, keeping the temperature at 1450 ℃ for 180min, and heating at the speed of 3.5 ℃/min to obtain a finished welding riving knife product.
7. A method of manufacturing a welded riving knife for use in manufacturing the welded riving knife of any one of claims 1-5, the method comprising: the welding chopper is prepared by adopting a dry pressing forming method, and the method comprises the following steps:
a preparation stage: the shaping wire sequentially passes through the clamping mechanism, the die plate, the male die, a die cavity formed by butting the left half die and the right half die and the lower die plate, and the end part of the shaping wire penetrating out of the lower die plate is connected to the wire drawing mechanism;
a charging stage: adding sufficient ceramic powder into the die cavity;
and (3) forming: clamping and locking the shaping wire by the clamping mechanism, then clamping and tensioning the shaping wire by the wire drawing mechanism to enable the shaping wire to be in a tensioned state, ensuring the verticality and concentricity of an inner hole after the blank body is formed, and finally pressing the die plate and the male die in place to complete the forming of the welding chopper blank body;
and (3) demolding: and separating the left half die and the right half die left and right, wherein the separation width is larger than the diameter size of the welding chopper blank, then loosening the clamping mechanism, and continuously pulling the wire drawing mechanism to drive the welding chopper blank to be separated from the die cavity.
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| CN110265313A (en) * | 2019-07-25 | 2019-09-20 | 刘欢 | Energy integration welds chopper |
| CN110385440B (en) * | 2019-07-29 | 2022-04-19 | 无锡精蓉创材料科技有限公司 | Production process of powder metallurgy deep cavity welding cleaver |
| CN110497166A (en) * | 2019-08-13 | 2019-11-26 | 成都精蓉创科技有限公司 | A kind of deep chamber weldering chopper and its production technology for full-automatic wirebond machine |
| CN110842339B (en) * | 2019-11-12 | 2023-11-07 | 苏州三环科技有限公司 | Ceramic chopper |
| CN110977135A (en) * | 2019-12-31 | 2020-04-10 | 刘欢 | Welding chopper |
| CN114799595A (en) * | 2022-04-13 | 2022-07-29 | 有研工程技术研究院有限公司 | Deep cavity welding wedge-shaped cleaver and machining method thereof |
| CN116573939A (en) * | 2023-07-07 | 2023-08-11 | 有研工程技术研究院有限公司 | Tungsten carbide material for high-performance wedge welding chopper and production method thereof |
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| US6295729B1 (en) * | 1992-10-19 | 2001-10-02 | International Business Machines Corporation | Angled flying lead wire bonding process |
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| JPS63211729A (en) * | 1987-02-27 | 1988-09-02 | Toshiba Corp | Manufacture of capillary for wire bonding |
| JPH07130749A (en) * | 1993-10-28 | 1995-05-19 | Sony Corp | Apparatus and method for jointing of lead of electronic component |
| CN1366479A (en) * | 2000-04-28 | 2002-08-28 | 库利克-索法投资公司 | Efficient energy transfer capillary |
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