CN115954172A - Production process of chip resistor and resistor splicing tape - Google Patents
Production process of chip resistor and resistor splicing tape Download PDFInfo
- Publication number
- CN115954172A CN115954172A CN202211344516.9A CN202211344516A CN115954172A CN 115954172 A CN115954172 A CN 115954172A CN 202211344516 A CN202211344516 A CN 202211344516A CN 115954172 A CN115954172 A CN 115954172A
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- Prior art keywords
- resistor
- strip
- resistor body
- cutting
- splicing tape
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 37
- 238000005520 cutting process Methods 0.000 claims abstract description 56
- 238000000034 method Methods 0.000 claims abstract description 21
- 239000002245 particle Substances 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 9
- 238000004806 packaging method and process Methods 0.000 claims description 16
- 238000009713 electroplating Methods 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 229910001369 Brass Inorganic materials 0.000 claims description 3
- 229910001006 Constantan Inorganic materials 0.000 claims description 3
- 229910000896 Manganin Inorganic materials 0.000 claims description 3
- 239000010951 brass Substances 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 16
- 238000004080 punching Methods 0.000 abstract description 10
- 239000002994 raw material Substances 0.000 abstract description 10
- 238000010924 continuous production Methods 0.000 abstract description 5
- 238000007599 discharging Methods 0.000 abstract description 5
- 239000000047 product Substances 0.000 description 7
- 238000003754 machining Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Apparatuses And Processes For Manufacturing Resistors (AREA)
Abstract
The invention relates to the technical field of resistor production, in particular to a production process of a chip resistor and a resistor splicing tape. According to the invention, the pre-punched holes are arranged on the resistor body strip at equal intervals, and the cutting groove position of the resistor splicing tape can be positioned through the pre-punched holes, so that the cutting precision of the middle resistor body and the resistor particles is ensured, the total width of the resistor splicing tape can be equal to the total width of a resistor product, and compared with the traditional mode that positioning holes are arranged on a wider electrode strip, the waste of raw materials is greatly reduced, and the cost is reduced; grooving processing is carried out on the pre-punching position on the resistor body strip, so that the generation of waste materials can be further reduced; the resistor body strips after grooving are mutually independent middle resistor bodies, the electrode strips on two sides can support and position a single middle resistor body, continuous production of multiple processes is realized by a mode of punching on a material belt without cutting off, the cost and loss of feeding and discharging or transferring in the midway are reduced, and the production efficiency is improved.
Description
Technical Field
The invention relates to the technical field of resistor production, in particular to a chip resistor production process and a resistor splicing tape.
Background
In the existing production and manufacturing process, each flow of the chip resistor needs to be carried out step by step, the splicing belt in the processing needs to be fed or discharged or transferred for multiple times, the processing precision is low, the cost and the loss are greatly increased, meanwhile, the total width of raw materials is larger than the total width of a resistor product (see figure 3), a positioning hole (82) is arranged on an electrode material (81) on one side of the splicing belt and used as a positioning reference for subsequent resistor punching and other processing, a large amount of waste of electrode strips can be caused after resistor forming, and meanwhile, when synchronous punching can be carried out on electrodes at two ends of the existing resistor (8) and a resistor in the punching process, more resistor strips and electrode strip waste can be generated, so that the waste of raw materials is further caused in the production cost of the chip resistor.
Disclosure of Invention
The invention aims to solve the technical problem of providing a chip resistor production process and a resistor splicing tape which greatly reduce the waste of raw materials, have high processing precision, reduce the cost and loss of feeding and discharging or transferring in the midway and improve the production efficiency.
The invention can obviously reduce the cost of raw materials in the production process of the alloy chip resistor
In order to solve the technical problems, the technical scheme adopted by the invention for solving the technical problems is as follows:
a production process of a chip resistor comprises the following steps:
preparing an electrode strip and a resistor strip for processing a chip resistor, wherein the resistor strip is provided with pre-punched holes at equal intervals, and the electrode strip and the resistor strip are welded to form a resistor splicing tape; grooving the pre-punched positions on the resistor body strip materials to enable the resistor body strip materials to be mutually independent middle resistor bodies; packaging the middle resistor body on the grooved resistor splicing belt; and cutting the packaged resistor splicing tape along the cutting groove position to form resistor particles, electroplating electrodes at two ends of the resistor particles, and marking on the packaged middle resistor body.
Further, the resistor body strip is provided with pre-punched holes at equal intervals, and the pre-punched holes comprise:
the pre-punched holes comprise a plurality of positioning holes, connecting lines of circle centers of all the positioning holes are perpendicular to the resistor body strip, and the connecting lines and the center lines of the cutting grooves are arranged on the same straight line or in parallel.
Further, the pre-punched holes may be disposed at the edge or the middle of the resistor strip, and the diameter of the pre-punched holes is smaller than or equal to the width of the cutting groove.
Further, before grooving the resistor body strip with the pre-punched holes on the resistor splicing belt, the grooving method comprises the following steps:
the resistance splicing tape is subjected to precutting treatment, precutting lines are formed on an electrode strip and a resistor body strip of the resistance splicing tape, and the circle center of the pre-punched hole is located on the precutting lines or distributed around the precutting lines.
Further, the pre-punched hole can be any one of a counter bore, a through hole or a blind hole.
Further, after grooving the resistor body strip with the pre-punched holes on the resistor splicing belt, the method comprises the following steps:
the method comprises the steps that pre-cut grooves are formed in resistor body strips after grooving processing is carried out on resistor splicing belts, the two ends of each pre-cut groove are connected with electrode strips, middle resistor bodies on the resistor body strips are separated through the pre-cut grooves, and the two sides of the adjacent middle resistor bodies are connected through the electrode strips.
Further, the process of packaging the middle resistor body on the grooved resistor splicing tape comprises the following steps:
half of the width of the cutting groove is larger than the packaging thickness of the middle resistor body, so that the adjacent middle resistor bodies are still mutually independent after being packaged.
Furthermore, the resistor body and the electrodes of the resistor particles are both of a sheet structure, the resistor body strip is made of manganin or constantan, and the electrode strip is made of red copper or brass.
Further, the grooving process for the resistor body strip with the pre-punched holes on the resistor splicing belt comprises the following steps:
the precutting line and the central line of the cutting groove are on the same straight line, when the cutting groove is processed on the resistor body strip, the precutting holes on the resistor body are cut off together, and the precutting groove is formed at the position of the precutting holes.
The invention further comprises a resistor splicing belt which comprises a resistor body strip, wherein electrode strips are arranged on two sides of the resistor body strip, at least one pre-punched hole is formed in the resistor body strip, after grooving is carried out on the pre-punched hole position on the resistor body strip, the resistor body strip is made into an independent middle resistor body, and two sides of the adjacent middle resistor body are connected through the electrode strips.
The invention has the beneficial effects that:
according to the invention, the pre-punched holes are arranged on the resistor body strip at equal intervals, and the cutting groove position of the resistor splicing tape can be positioned through the pre-punched holes, so that the cutting precision of the middle resistor body and the resistor particles is ensured, the total width of the resistor splicing tape can be equal to the total width of a resistor product, and compared with the traditional mode that positioning holes are arranged on a wider electrode strip, the waste of raw materials is greatly reduced, and the cost is reduced; grooving the pre-punched hole position on the resistor strip, so that the generation of waste materials can be further reduced; the resistor body strips after grooving are mutually independent middle resistor bodies, the electrode strips on two sides can support and position a single middle resistor body, continuous production of multiple processes is realized by a mode of punching on a material belt without cutting off, the cost and loss of feeding and discharging or transferring in the midway are reduced, and the production efficiency is improved.
Drawings
Fig. 1 is a schematic diagram of a manufacturing process of a chip resistor according to the present invention.
FIG. 2 is a schematic view of the resistive splicing tape of the present invention.
Fig. 3 is a schematic diagram of prior art electrical resistance processing.
The numbering in the figures illustrates: 1. a resistor splicing tape; 11. a resistor strip; 12. an electrode strip; 13. pre-punching; 14. pre-cutting lines; 15. grooving position; 2. an intermediate resistor body; 3. packaging; 4. cutting position; 5. resistive particles; 6. electroplating treatment; 7. and (5) marking treatment.
Detailed Description
The present invention is further described below in conjunction with the drawings and the embodiments so that those skilled in the art can better understand the present invention and can carry out the present invention, but the embodiments are not to be construed as limiting the present invention.
Referring to fig. 1-2, a process for manufacturing a chip resistor includes:
preparing an electrode strip and a resistor strip for processing a chip resistor, wherein pre-punched holes are arranged on the resistor strip at equal intervals, and the electrode strip and the resistor strip are welded to form a resistor splicing strip; grooving the pre-punched positions on the resistor body strip materials to enable the resistor body strip materials to be mutually independent middle resistor bodies; packaging the middle resistor body on the grooved resistor splicing belt; and cutting the packaged resistor splicing tape along the groove cutting position to form resistor particles, and marking on the packaged middle resistor body after electroplating the electrodes at the two ends of the resistor particles.
According to the invention, the pre-punched holes are arranged on the resistor body strip at equal intervals, and the cutting groove position of the resistor splicing tape can be positioned through the pre-punched holes, so that the cutting precision of the middle resistor body and the resistor particles is ensured, the total width of the resistor splicing tape can be equal to the total width of a resistor product, and compared with the traditional mode that positioning holes are arranged on a wider electrode strip, the waste of raw materials is greatly reduced, and the cost is reduced; grooving processing is carried out on the pre-punching position on the resistor body strip, so that the generation of waste materials can be further reduced; the resistor body strips after grooving are mutually independent middle resistor bodies, the electrode strips on two sides can support and position a single middle resistor body, continuous production of multiple processes is realized by a mode of punching on a material belt without cutting off, the cost and loss of feeding and discharging or transferring in the midway are reduced, and the production efficiency is improved.
Further, the resistor body strip is provided with pre-punched holes at equal intervals, and the pre-punched holes comprise:
the pre-punched holes comprise a plurality of positioning holes, connecting lines of circle centers of all the positioning holes are perpendicular to the resistor body strip, and the connecting lines and the center lines of the cutting grooves are arranged on the same straight line or in parallel.
Specifically, the connecting line is arranged in parallel with the central line of the cutting groove, and the gap between the connecting line and the central line of the cutting groove is small, so that the cutting groove area comprises all positioning holes, and the positioning holes and the connecting line are mainly used for providing cutting positioning for the cutting groove position;
the connecting lines of the circle centers among the positioning holes are perpendicular to the resistor body strips, the grooving regions can be positioned in the vertical direction, grooving grooves are further prevented from being formed due to the fact that grooving positions and precutting lines caused by single pre-punched holes are in a certain angle during grooving, and accuracy of grooving is greatly guaranteed.
Furthermore, the pre-punched holes can be arranged at the edge or the middle part of the resistor strip, and the diameter of the pre-punched holes is smaller than or equal to the width of the cutting groove.
Specifically, the pre-punched holes can be arranged at the edge or the middle part of the resistor body strip, the cutting groove positions of the resistor splicing belts can be positioned through the pre-punched holes, the cutting precision of the middle resistor body and resistor particles is ensured, meanwhile, the pre-punched holes are arranged on the resistor body strip, the weight of the resistor body can be further reduced, and the processing difficulty of processing equipment is reduced;
the diameter less than or equal to grooving width of the pre-punched hole can directly cut the pre-punched hole in the same time during grooving, the grooving can be used as a positioning reference for subsequent cutting, waste materials are effectively reduced, the problem of waste of raw materials caused by grooving is greatly reduced, and the cost is reduced.
Further, before grooving the resistor body strip with the pre-punched holes on the resistor splicing belt, the grooving method comprises the following steps:
the resistance splicing tape is subjected to precutting treatment, precutting lines are formed on an electrode strip and a resistor body strip of the resistance splicing tape, and the circle center of the pre-punched hole is located on the precutting lines or distributed around the precutting lines.
Specifically, the precutting line and the preprunching hole are arranged on the resistor splicing tape at the same interval, the precutting line refers to the fact that a cutting mark and a breaking point are formed but the precutting line is not completely broken from the resistor splicing tape, so that a positioning reference is provided for the follow-up resistor splicing tape when a single resistor monomer is cut in the follow-up resistor splicing tape, continuous production of a post process can be achieved, the cost of feeding and discharging or transferring in the middle is reduced, and the production efficiency is improved.
The circle center of the pre-punched hole is located on the pre-cutting line or distributed around the pre-cutting line, the pre-punched hole is used for accurately positioning the pre-cutting line, the subsequent grooving and the machining precision during cutting are guaranteed, the machining procedure is optimized, and the process operation difficulty is reduced.
Further, the pre-punched hole can be any one of a counter bore, a through hole or a blind hole.
Specifically, any one of the counter bore, the through hole or the blind hole can provide accurate positioning of a grooving position or a cutting position, waste of raw materials is greatly reduced, and cost is reduced.
Further, after grooving the resistor body strip with the pre-punched holes on the resistor splicing belt, the method comprises the following steps:
the method comprises the steps that pre-cut grooves are formed in resistor body strips after grooving processing is carried out on resistor splicing belts, the two ends of each pre-cut groove are connected with electrode strips, middle resistor bodies on the resistor body strips are separated through the pre-cut grooves, and the two sides of the adjacent middle resistor bodies are connected through the electrode strips.
Specifically, grooving is formed on the resistor body strip after grooving the resistor splicing tape, the grooving only cuts the resistor body strip, waste of the electrode strip is reduced, production cost of a product is effectively reduced, market competitiveness of the product can be enhanced, the electrode strip is connected to two ends of the grooving, the middle resistor body on the resistor body strip is separated through the grooving, stable connection of the electrode strip and the middle resistor body can be guaranteed, production efficiency is high, and cost is saved.
The two sides of the adjacent middle resistor bodies are connected through the electrode strips, the electrode strips on the two sides can support and position a single middle resistor body, and compared with a traditional intermediate body which is only connected with the electrode strip on one side, the problem that the splicing belts are twisted due to the motor strips on one side cannot occur, the secondary transfer positioning in the later period is not needed, the continuous production of the post process can be realized, and the production efficiency is improved.
Further, the process of packaging the middle resistor body on the grooved resistor splicing tape comprises the following steps:
the half width of the cutting groove is larger than the packaging thickness of the middle resistor body, so that the adjacent middle resistor bodies are still mutually independent after packaging.
Specifically, half of the width of the cutting groove is larger than the packaging thickness of the middle resistor body, a position enough for packaging the middle resistor body is reserved, the uniformity of the packaging thickness of the middle resistor body is ensured, the adjacent middle resistor bodies are still arranged independently after being packaged, and the production quality of the resistor is further improved.
Furthermore, the resistor body and the electrodes of the resistor particles are both of a sheet structure, the resistor body strip is made of manganin or constantan, and the electrode strip is made of red copper or brass.
Furthermore, grooving the resistor body strip with the pre-punched holes on the resistor splicing belt comprises the following steps:
and the pre-cutting line and the central line of the cutting groove are on the same straight line, when the cutting groove is processed on the resistor body strip, the pre-punched holes on the resistor body are cut off together, and the pre-cutting groove is formed at the pre-punched hole position.
Specifically, the pre-punched holes on the resistor body are cut off together, the pre-cutting grooves are formed in the pre-punched holes, the pre-cutting grooves can be used as positioning references for subsequent processing, waste materials are effectively reduced, the problem of waste of resistor body strips caused by cutting grooves is greatly reduced, and cost is reduced.
The cutting of the resistor particles can be carried out in a stamping mode, a blade cutting mode, a laser mode, a wire-cut electric discharge machining mode or a CNC cutting mode, the automation degree is high, the production efficiency is high, and the cost is saved.
The method can mark on the packaged middle resistor body by screen printing, code spraying, laser typing or pasting, can obviously improve the production efficiency of the resistor, improve the yield of the chip resistor and improve the economic benefit of enterprises.
The invention further comprises a resistor splicing belt which comprises a resistor body strip, wherein electrode strips are arranged on two sides of the resistor body strip, at least one pre-punched hole is formed in the resistor body strip, after grooving is carried out on the pre-punched hole position on the resistor body strip, the resistor body strip is made into an independent middle resistor body, and two sides of the adjacent middle resistor body are connected through the electrode strips.
Specifically, the raw material used in the invention is a resistor splicing tape formed by combining a resistor body and red copper, pre-punching and grooving are firstly carried out, then an insulating material is packaged or coated in the middle resistor body area, and then resistor particles are cut, and a single resistor particle semi-finished product is cut; and finally, electroplating electrodes at two ends of the resistor particles, and performing subsequent testing, marking and packaging to complete production.
The invention can effectively reduce the production cost of the product, can enhance the market competitiveness of the product and is suitable for batch production.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (10)
1. A production process of a chip resistor is characterized by comprising the following steps:
preparing an electrode strip and a resistor strip for processing a chip resistor, wherein pre-punched holes are arranged on the resistor strip at equal intervals, and the electrode strip and the resistor strip are welded to form a resistor splicing strip; grooving the pre-punched positions on the resistor body strip materials to enable the resistor body strip materials to be mutually independent middle resistor bodies; packaging the middle resistor body on the grooved resistor splicing belt; and cutting the packaged resistor splicing tape along the groove cutting position to form resistor particles, and marking on the packaged middle resistor body after electroplating the electrodes at the two ends of the resistor particles.
2. The production process of the chip resistor as claimed in claim 1, wherein the resistor body strip is provided with pre-punched holes at equal intervals, and the production process comprises the following steps:
the pre-punched holes comprise a plurality of positioning holes, connecting lines of circle centers of all the positioning holes are perpendicular to the resistor body strip, and the connecting lines and the center lines of the cutting grooves are arranged on the same straight line or in parallel.
3. The manufacturing process of the chip resistor as claimed in claim 1, wherein the pre-punched holes are formed at the edges or the middle part of the resistor strip, and the diameter of the pre-punched holes is equal to or less than the width of the cutting groove.
4. The manufacturing process of the chip resistor according to claim 1, wherein the cutting process of the resistor strip with the pre-punched holes on the resistor splicing tape comprises:
the resistance splicing tape is subjected to precutting treatment, precutting lines are formed on an electrode strip and a resistor body strip of the resistance splicing tape, and the circle center of the pre-punched hole is located on the precutting lines or distributed around the precutting lines.
5. The production process of the chip resistor as claimed in claim 1, wherein the pre-punched hole can be any one of a counter bore, a through hole or a blind hole.
6. The manufacturing process of the chip resistor according to claim 1, wherein the grooving process for the resistor strip with the pre-punched holes on the resistor splicing tape comprises:
the method comprises the steps that pre-cut grooves are formed in resistor body strips after grooving processing is carried out on resistor splicing belts, the two ends of each pre-cut groove are connected with electrode strips, middle resistor bodies on the resistor body strips are separated through the pre-cut grooves, and the two sides of the adjacent middle resistor bodies are connected through the electrode strips.
7. The production process of the chip resistor as claimed in claim 1, wherein the step of packaging the middle resistor body on the cut resistor splicing tape comprises the following steps:
the half width of the cutting groove is larger than the packaging thickness of the middle resistor body, so that the adjacent middle resistor bodies are still mutually independent after packaging.
8. The manufacturing process of the chip resistor as claimed in claim 1, wherein the resistor body and the electrodes of the resistor particles are both of sheet structure, the resistor body strip is made of manganin or constantan, and the electrode strip is made of red copper or brass.
9. The manufacturing process of the chip resistor as claimed in claim 4, wherein the grooving process for the resistor body strip with the pre-punched holes on the resistor splicing tape comprises:
the precutting line and the central line of the cutting groove are on the same straight line, when the cutting groove is processed on the resistor body strip, the precutting holes on the resistor body are cut off together, and the precutting groove is formed at the position of the precutting holes.
10. The resistor splicing belt is characterized by comprising a resistor body strip, wherein electrode strips are arranged on two sides of the resistor body strip, at least one pre-punched hole is formed in the resistor body strip, after grooving is conducted on the pre-punched hole position on the resistor body strip, the resistor body strip is made into a mutually independent middle resistor body, and two sides of adjacent middle resistor bodies are connected through the electrode strips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211344516.9A CN115954172A (en) | 2022-10-31 | 2022-10-31 | Production process of chip resistor and resistor splicing tape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211344516.9A CN115954172A (en) | 2022-10-31 | 2022-10-31 | Production process of chip resistor and resistor splicing tape |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115954172A true CN115954172A (en) | 2023-04-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211344516.9A Pending CN115954172A (en) | 2022-10-31 | 2022-10-31 | Production process of chip resistor and resistor splicing tape |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115954172A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118098737A (en) * | 2024-04-28 | 2024-05-28 | 业展电子(惠州市)有限公司 | Metal material slotting equipment, resistor processing technology and alloy resistor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1877753A (en) * | 2005-06-06 | 2006-12-13 | 余英梅 | Resistance and method for producing same |
| CN109841365A (en) * | 2019-03-28 | 2019-06-04 | 常德思高技术有限公司 | A kind of metal plate chip resistor and its manufacturing method |
-
2022
- 2022-10-31 CN CN202211344516.9A patent/CN115954172A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1877753A (en) * | 2005-06-06 | 2006-12-13 | 余英梅 | Resistance and method for producing same |
| CN109841365A (en) * | 2019-03-28 | 2019-06-04 | 常德思高技术有限公司 | A kind of metal plate chip resistor and its manufacturing method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118098737A (en) * | 2024-04-28 | 2024-05-28 | 业展电子(惠州市)有限公司 | Metal material slotting equipment, resistor processing technology and alloy resistor |
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