CN112621123A - Novel needle selection cam of computerized flat knitting machine and production process - Google Patents
Novel needle selection cam of computerized flat knitting machine and production process Download PDFInfo
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- CN112621123A CN112621123A CN202011441773.5A CN202011441773A CN112621123A CN 112621123 A CN112621123 A CN 112621123A CN 202011441773 A CN202011441773 A CN 202011441773A CN 112621123 A CN112621123 A CN 112621123A
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- Prior art keywords
- needle selection
- blank
- knitting machine
- flat knitting
- computerized flat
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
- D04B15/32—Cam systems or assemblies for operating knitting instruments
- D04B15/36—Cam systems or assemblies for operating knitting instruments for flat-bed knitting machines
Abstract
A novel needle selection cam of a computerized flat knitting machine and a production process belong to the field of production of parts of the computerized flat knitting machine. The needle selection cam of the computerized flat knitting machine comprises a mounting part and a T-shaped working part, wherein the T-shaped working part is positioned at the upper end of the mounting part, the top surface of the T-shaped working part is a conical inclined surface, and the conical inclined surface is used as a working surface to drive a needle selection piece to move up and down; the installation department includes pivot mount pad and magnet mount pad, and pivot mount pad quantity is two and coaxial arranging side by side, and two are located the pivot mount pad and set up in the bottom surface of T type work portion, and the magnet mount pad sets up in one of them pivot mount pad bottom surface and integrated into one piece, and permanent magnet inlays the dress in the embedding groove that forms bottom the magnet mount pad. The invention carries out structural design on the key working surface and the mounting part of the needle selection triangle, changes the original point contact into surface contact, adopts a reasonable angle of 7 degrees +/-0.1 degree of the inclination angle of the working surface, and improves the service life of a finished product, thereby leading the needle selection triangle to have the advantages of large contact surface and long service life.
Description
Technical Field
The invention relates to the field of production of parts of a computerized flat knitting machine, in particular to a needle selection cam production process of a computerized flat knitting machine.
Background
The needle selector is an important part in the work of the computerized flat knitting machine, when the computerized flat knitting machine selects the needle, the electromagnetic spiral tube of the needle selector generates the polarity due to the influence of the current in a certain direction, the magnetic field with the polarity and the permanent magnet can generate the magnetic field action, the needle head of the needle selector is swung up around the shaft through the push-pull action to avoid the action with the needle piece teeth, and then the needle selection piece rises along the needle selection triangle to complete one task. In the process, the quality of the needle selection cam and the contact stability of the needle selection cam and the needle sheet directly influence the accuracy and reliability of needle selection control, and influence the product quality and production efficiency of the computerized flat knitting machine.
The needle selection cam production process of the computerized flat knitting machine in the market at present basically adopts linear cutting machining for one-step cutting forming, and a product is formed after a polishing process. Secondly, in order to facilitate processing and reduce production cost, the rotating shaft mounting seat part adopts an open structure and is directly cut and formed by linear cutting, so that the needle selection cam is stressed and deformed at the open part when in use, the rotating shaft is blocked, and finally the whole selector is scrapped, thereby influencing the production efficiency and the production cost of a computerized flat knitting machine enterprise.
Disclosure of Invention
The invention aims to overcome the technical problems in the background technology and provides a novel needle selection cam of a computerized flat knitting machine and a production process thereof, wherein the needle selection cam has high processing precision, good appearance consistency and toughness and long service life.
Therefore, the invention adopts the following technical scheme: a novel needle selection cam of a computerized flat knitting machine comprises a mounting part and a T-shaped working part, wherein the T-shaped working part is positioned at the upper end of the mounting part, the top surface of the T-shaped working part is a conical inclined plane, and the conical inclined plane is used as a working surface to drive a needle selection piece to move up and down; the mounting part of the needle selection triangle comprises two rotating shaft mounting seats and two magnet mounting seats, the two rotating shaft mounting seats are coaxially arranged side by side, the two rotating shaft mounting seats are positioned on the bottom surface of the T-shaped working part, the magnet mounting seats are arranged on the bottom surface of one of the rotating shaft mounting seats and are integrally formed, the permanent magnets are embedded in an embedding groove formed in the bottom of the magnet mounting seat, a conical inclined surface of the top surface is in line contact with the needle selection sheet in working, the contact area of the conical inclined surface and the needle selection sheet in the sliding engineering is increased, the bearing capacity is increased, and the stability of a product is improved.
The installation seat part of the rotating shaft adopts a closed structure and is formed by a new process, so that when the needle selection cam is used and stressed, the installation part is not easy to generate stress deformation, and the phenomenon of dead locking of the rotating shaft is eliminated.
A needle selection cam production process of a computerized flat knitting machine comprises the following steps:
1) forging the blank, namely forging the blank by a 5-ton forging press, wherein the thickness of the forged blank is 6mm +/-0.3 mm, so that the property of the internal crystal of the blank is changed, and the comprehensive performance of the material is improved;
2) aging treatment, namely aging treatment is carried out on the forged blank, the blank is placed in a special clamp during the aging treatment, and then the blank is placed in a space with the room temperature of 15-25 ℃ for aging for more than 120 hours;
3) plane grinding: carrying out plane fine grinding on the upper surface and the lower surface of the blank subjected to the aging heat treatment, wherein the parallelism size of the upper surface and the lower surface of the blank subjected to the plane fine grinding is ensured to be within 5 +/-0.02 mm;
4) and (3) cutting the fast-moving wire: placing the needle selection triangular blank material subjected to plane grinding on an online cutting machine, cutting the needle selection triangular blank material into a semi-finished product, ensuring the dimensional accuracy of an installation part and a T-shaped working part to be 0.01mm in error, reserving 0.5mm of fine machining allowance at a conical inclined plane, and ensuring that the wire moving speed is 150-220 mm2Min, ensuring that the surface roughness of the installation part and the periphery of the T-shaped working part is below 1.6 um;
5) and (3) finishing the tapered inclined surface of the T-shaped working part: placing the needle selection triangle processed and formed in the step 4) in a special fixture for secondary finish machining of a conical inclined plane, wherein a hard alloy cutter with the diameter of 4mm is adopted for finish machining, the rotating speed is 6000r/min, the feeding speed is 1000mm/min, the absolute error of the surface roughness is ensured to be below 0.8 um, and the inclination angle of a working surface is 7 +/-0.1 degrees;
6) drilling and processing the mounting seat part of the rotating shaft: placing the needle selection triangle processed in the step 5) on a special fixture, drilling two rotating shaft mounting holes, performing split rotation processing on the drilled holes, after one end is processed, rotating the workpiece by 180 degrees, then drilling the other end, performing one-time clamping and secondary drilling molding, wherein the absolute error of the hole distance after drilling is plus or minus 0.04mm, and the coaxiality of the two holes is plus or minus 0.02 mm;
7) tempering heat treatment: fixing the needle selection triangle treated in the step 6) in a shaping fixture tool, and carrying out tempering heat treatment at the temperature of 200-250 ℃ for 1-3 hours;
8) chamfering and fine machining: processing the needle selecting presser foot processed and molded in the step 7) in a chamfering and polishing machine, wherein a sharp corner is blunt and smoothly transited, and the absolute error of the surface roughness is ensured to be below 1.6 um;
9) laser marking and rust-proof treatment: and (3) carrying out laser marking and rust-proof treatment on the needle selection triangle processed and formed in the step 8), and packaging to form a finished product.
The invention can achieve the following beneficial effects: 1. the invention carries out structural design on the key working surface and the mounting part of the needle selection triangle, changes the original point contact into surface contact, adopts a reasonable angle of 7 degrees +/-0.1 degree of the inclination angle of the working surface, and improves the service life of a finished product, so that the needle selection triangle has the advantages of large contact surface, long service life and bright and beautiful appearance. 2. The processing technology of the invention greatly improves the organization structure of the product parts through forging, aging, tempering and the like, increases the comprehensive mechanical property of the product, adopts precise mechanical processing on key parts, improves the use precision of the product, changes the processing defect of one-step forming of the traditional technology, greatly improves the use precision and the service life of the product, and thus generally improves the whole service life of the selector.
Drawings
Fig. 1 is a structural schematic view of a needle selection cam of the flat knitting machine of the present invention.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and the described embodiments are illustrative and explanatory of the invention and are not to be construed as limiting the invention solely thereto.
Example (b): the needle selection cam of the computerized flat knitting machine comprises a mounting part and a T-shaped working part 1, wherein the T-shaped working part is positioned at the upper end of the mounting part, the top surface of the T-shaped working part 1 is a conical inclined surface, and the conical inclined surface is used as a working surface to drive a needle selection piece to move up and down; the mounting part of the needle selection triangle comprises two rotating shaft mounting seats 2 and two magnet mounting seats 3, the two rotating shaft mounting seats are coaxially arranged side by side, the two rotating shaft mounting seats are arranged on the bottom surface of the T-shaped working part, the magnet mounting seats are arranged on the bottom surface of one of the rotating shaft mounting seats and are integrally formed, and the permanent magnets are embedded in embedding grooves formed at the bottoms of the magnet mounting seats; the installation seat part of the rotating shaft adopts a closed structure and is processed and molded by a new process, so that the installation part is not easy to generate stress deformation when the needle selection cam is used for bearing force, and the phenomenon of dead locking of the rotating shaft is eliminated.
The needle selection cam production process of the computerized flat knitting machine comprises the following steps:
1) forging the blank, namely forging the blank by a 5-ton forging press, wherein the thickness of the forged blank is guaranteed to be 6mm +/-0.3 mm, the property of the internal crystal of the forged blank is changed, and the comprehensive performance of the material is improved;
2) and (3) aging treatment, namely aging treatment is carried out on the forged blank, the blank is placed in a special fixture during aging treatment, and then the blank is placed in a space with the room temperature of 15-25 ℃ for aging for more than 120 hours.
3) Plane grinding: carrying out plane fine grinding on the upper surface and the lower surface of the blank subjected to the aging heat treatment, wherein the parallelism size of the upper surface and the lower surface of the blank subjected to the plane fine grinding is ensured to be within 5 +/-0.02 mm;
4) and (3) cutting the fast-moving wire: placing the needle selection triangular blank material subjected to plane grinding in the step 3 on an online cutting machine, cutting the needle selection triangular blank material into a semi-finished product, wherein the dimensional accuracy of the mounting part and the T-shaped working part is ensured to be 0.01mm in error, 0.5mm of fine machining allowance is reserved at the position of a conical inclined plane, and the wire moving speed is 150-220 mm2Min, ensuring that the surface roughness of the installation part and the periphery of the T-shaped working part is below 1.6 um;
5) finish machining of the conical inclined plane of the T-shaped working part: placing the needle selection triangle processed and formed in the step 4 in a special fixture for secondary finish machining of a conical inclined plane, wherein a hard alloy cutter with the diameter of 4mm is adopted for finish machining, the rotating speed is 6000r/min, the feeding is 1000mm/min, the absolute error of the surface roughness is ensured to be below 0.8 um, and the inclination angle of a working surface is 7 +/-0.1 degrees;
6) drilling and processing the mounting seat part of the rotating shaft: placing the needle selection triangle processed in the step 5 on a special fixture, drilling two rotating shaft mounting holes, performing split rotation processing on the drilled holes, after one end is processed, rotating the workpiece by 180 degrees, then drilling the other end, performing one-time clamping and secondary drilling molding, wherein the absolute error of the hole distance after drilling is plus or minus 0.04mm, and the coaxiality of the two holes is plus or minus 0.02 mm;
7) tempering heat treatment: fixing the needle selection triangle treated in the step 6 in a shaping fixture tool, and carrying out tempering heat treatment, wherein the tempering temperature is 200-250 ℃, and the temperature is kept for 1-3 hours;
8) chamfering and fine machining: processing the needle selecting presser foot processed and molded in the step 7 in a polishing machine to ensure that the sharp corner is blunt and smoothly transited and the absolute error of the surface roughness is below 1.6 um;
9) laser marking and rust-proof treatment: and (4) carrying out laser marking and rust prevention treatment on the needle selection triangle processed and formed in the step (8), and packaging to form a finished product.
After the product prepared by the scheme is used for 6 months, the degree of abrasion of the product is lower than 68.7% of that of the product manufactured by the traditional process through detection of a special abrasion device of a third party, the service life of the product is prolonged by 45.7%, the consistency of the product reaches more than 99.8%, the operation noise of the needle selector is reduced, and the overall use of the needle selector is improved by about 42.5% through data statistics.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.
Claims (3)
1. The utility model provides a novel computerized flat knitting machine selects needle triangle which characterized in that: the needle selection cam of the computerized flat knitting machine comprises a mounting part and a T-shaped working part, wherein the T-shaped working part is positioned at the upper end of the mounting part, the top surface of the T-shaped working part is a conical inclined surface, and the conical inclined surface is used as a working surface to drive a needle selection piece to move up and down; the mounting part of the needle selection triangle comprises two rotating shaft mounting seats and two magnet mounting seats, the two rotating shaft mounting seats are coaxially arranged side by side, the two rotating shaft mounting seats are arranged on the bottom surface of the T-shaped working part, the magnet mounting seats are arranged on the bottom surface of one of the rotating shaft mounting seats and are integrally formed, and the permanent magnets are embedded in embedding grooves formed in the bottoms of the magnet mounting seats.
2. The needle selection cam of the novel computerized flat knitting machine according to claim 1, characterized in that: the position of the rotating shaft mounting seat adopts a closed structure.
3. A needle selection cam production process of a computerized flat knitting machine is characterized by comprising the following steps:
1) forging the blank, namely forging the blank by a 5-ton forging press, wherein the thickness of the forged blank is 6mm +/-0.3 mm, so that the property of the internal crystal of the blank is changed, and the comprehensive performance of the material is improved;
2) aging treatment, namely aging treatment is carried out on the forged blank, the blank is placed in a special clamp during the aging treatment, and then the blank is placed in a space with the room temperature of 15-25 ℃ for aging for more than 120 hours;
3) plane grinding: carrying out plane fine grinding on the upper surface and the lower surface of the blank subjected to the aging heat treatment, wherein the parallelism size of the upper surface and the lower surface of the blank subjected to the plane fine grinding is ensured to be within 5 +/-0.02 mm;
4) and (3) cutting the fast-moving wire: placing the needle selection triangular blank material subjected to plane grinding on an online cutting machine, cutting the needle selection triangular blank material into a semi-finished product, ensuring the dimensional accuracy of an installation part and a T-shaped working part to be 0.01mm in error, reserving 0.5mm of fine machining allowance at a conical inclined plane, and ensuring that the wire moving speed is 150-220 mm2Min, ensuring that the surface roughness of the installation part and the periphery of the T-shaped working part is below 1.6 um;
5) and (3) finishing the tapered inclined surface of the T-shaped working part: placing the needle selection triangle processed and formed in the step 4) in a special fixture for secondary finish machining of a conical inclined plane, wherein a hard alloy cutter with the diameter of 4mm is adopted for finish machining, the rotating speed is 6000r/min, the feeding speed is 1000mm/min, the absolute error of the surface roughness is ensured to be below 0.8 um, and the inclination angle of a working surface is 7 +/-0.1 degrees;
6) drilling and processing the mounting seat part of the rotating shaft: placing the needle selection triangle processed in the step 5) on a special fixture, drilling two rotating shaft mounting holes, performing split rotation processing on the drilled holes, after one end is processed, rotating the workpiece by 180 degrees, then drilling the other end, performing one-time clamping and secondary drilling molding, wherein the absolute error of the hole distance after drilling is plus or minus 0.04mm, and the coaxiality of the two holes is plus or minus 0.02 mm;
7) tempering heat treatment: fixing the needle selection triangle treated in the step 6) in a shaping fixture tool, and carrying out tempering heat treatment at the temperature of 200-250 ℃ for 1-3 hours;
8) chamfering and fine machining: processing the needle selecting presser foot processed and molded in the step 7) in a chamfering and polishing machine, wherein a sharp corner is blunt and smoothly transited, and the absolute error of the surface roughness is ensured to be below 1.6 um;
9) laser marking and rust-proof treatment: and (3) carrying out laser marking and rust-proof treatment on the needle selection triangle processed and formed in the step 8), and packaging to form a finished product.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011441773.5A CN112621123B (en) | 2020-12-08 | 2020-12-08 | Novel needle selection cam of computerized flat knitting machine and production process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011441773.5A CN112621123B (en) | 2020-12-08 | 2020-12-08 | Novel needle selection cam of computerized flat knitting machine and production process |
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| CN112621123A true CN112621123A (en) | 2021-04-09 |
| CN112621123B CN112621123B (en) | 2022-03-25 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202543545U (en) * | 2012-01-13 | 2012-11-21 | 东莞市沃德电子科技有限公司 | Four-section needle selector for flat knitting machine |
| CN203498598U (en) * | 2013-09-26 | 2014-03-26 | 杭州乔辉电子科技有限公司 | Eight-section wear-resistant needle selector |
| CN203498599U (en) * | 2013-09-10 | 2014-03-26 | 绍兴鸿泰电脑控制技术设备有限公司 | Dual-row four-knife needle selector |
| CN103924376A (en) * | 2014-04-30 | 2014-07-16 | 龙金禄 | Sixteen-cutter high-frequency electromagnet drive type needle selector |
| CN106624643A (en) * | 2016-12-20 | 2017-05-10 | 新昌县大市聚镇职业中学 | Production technology of needle selection presser foots of flat knitting machine |
-
2020
- 2020-12-08 CN CN202011441773.5A patent/CN112621123B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202543545U (en) * | 2012-01-13 | 2012-11-21 | 东莞市沃德电子科技有限公司 | Four-section needle selector for flat knitting machine |
| CN203498599U (en) * | 2013-09-10 | 2014-03-26 | 绍兴鸿泰电脑控制技术设备有限公司 | Dual-row four-knife needle selector |
| CN203498598U (en) * | 2013-09-26 | 2014-03-26 | 杭州乔辉电子科技有限公司 | Eight-section wear-resistant needle selector |
| CN103924376A (en) * | 2014-04-30 | 2014-07-16 | 龙金禄 | Sixteen-cutter high-frequency electromagnet drive type needle selector |
| CN106624643A (en) * | 2016-12-20 | 2017-05-10 | 新昌县大市聚镇职业中学 | Production technology of needle selection presser foots of flat knitting machine |
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| Publication number | Publication date |
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| CN112621123B (en) | 2022-03-25 |
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