CN106624643B - A kind of straight-bar machines needle selection presser feet production technology - Google Patents

A kind of straight-bar machines needle selection presser feet production technology Download PDF

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Publication number
CN106624643B
CN106624643B CN201611186326.3A CN201611186326A CN106624643B CN 106624643 B CN106624643 B CN 106624643B CN 201611186326 A CN201611186326 A CN 201611186326A CN 106624643 B CN106624643 B CN 106624643B
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presser feet
blank
needle selection
heat treatment
carries
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CN106624643A (en
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陈光明
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Xinchang County Dashiju Vocational Middle School
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Xinchang County Dashiju Vocational Middle School
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass

Abstract

The invention discloses a kind of straight-bar machines needle selection presser feet production technologies, belong to knitting Computerized flat knitting machine parts production field, existing needle selection presser feet production technology has that stress concentration, deflection make greatly needle selection presser feet poor toughness, service life short in the heat treatment process after excision forming.The present invention includes the following steps:1)Blank forges and presses;2)Drilling;3)Pressing and bending;4)Heat treatment;5)Flat stone mill;6)Tempering heat treatment;7)Fast wire winding is cut;8)Chamfering finishes;9)Correction processing;Have the advantages that good toughness, with long service life, and the bright and new beauty of appearance using the needle selection presser feet of the technique productions.

Description

A kind of straight-bar machines needle selection presser feet production technology
Technical field
The present invention relates to knitting Computerized flat knitting machine parts production fields, especially have with a kind of straight-bar machines needle selection presser feet production technology It closes.
Background technology
Needle selection presser feet is one of the important component being knitted on Computerized flat knitting machine, and main function is in Computerized flat knitting machine knitting process The quality of the up and down motion of middle compacting needle selection, needle selection presser feet quality is directly related to the quality of production of knitting product and production is expected Rate.Needle selection presser feet production technology currently on the market uses linear cutter excision forming substantially, through processes such as bending, drillings Afterwards, final heat treatment and shape sanding and polishing and correction process process are carried out, due to needle selection presser feet thin in profile, especially work Make that position shape is tiny, in the heat treatment process after excision forming there are stress concentration, deflection is big the problems such as so that needle selection Presser feet poor toughness, service life are short, and breakage phenomenon is susceptible to during use, secondly, are adopted during shape sanding and polishing Manually hand sand, there are appearance and size poor controllabilities, and overlong time of polishing easy tos produce rubescent, flow harden etc. now As reducing the qualification rate and production quality of product.
Invention content
The purpose of the present invention is intended to overcome above-mentioned technical barrier present in above-mentioned background technology, provides a kind of machining accuracy High, conformity and good toughness, straight-bar machines needle selection presser feet production technology with long service life.
For this purpose, the present invention uses following technical scheme:A kind of straight-bar machines needle selection presser feet production technology, characterized in that the cross Machine needle selection presser feet production technology includes the following steps:
1)Blank forges and presses:By blank by high velocity ram machine punch forming;
2)Drilling:By step 1)Treated, and blank bores fixed mounting hole at two on drill jig, drills as one-pass molding, and The absolute error of pitch-row after drilling is ± 0.04mm;
3)Pressing and bending:In step 2)Blank after drilling, which is placed on bender, carries out punching press angle bending processing, protects Bending angle is demonstrate,proved at 30 ° ± 1 °;
4)Heat treatment:By step 3)Blank after pressing and bending carries out clamping and fixes, and is then carried out to the blank fixed Preheating, the preheating temperature are 760~810 DEG C, keep the temperature 10~15min;Blank is quenched again, the hardening heat is 1000~1050 DEG C, and 10~20min is kept the temperature, then it is cooled to room temperature in still air;
5)Flat stone mill:To step 4)The upper and lower surface of blank after heat treatment carries out planar accurate grinding, the blank after planar accurate grinding Depth of parallelism Assurance of Size upper and lower surfaces of between -0.01~+0.01mm;
6)Tempering heat treatment:First by step 5)Treated, and blank is fixed in shape-setting clamp tooling, carries out being tempered hot place Reason, the temperature are 200~250 DEG C, keep the temperature 1~3 hour;
7)Fast wire winding is cut:By step 6)Presser feet working position after heat treatment, which is clamped in special fixture, to carry out more than blank Amount removal finishing, the absolute dimension error on semi-finished product periphery is 0.01mm after cutting, and wire travelling speed is 400~450mm2/ min;
8)Chamfering finishes:To step 7)The needle selection presser feet of machine-shaping carries out chamfer polishing machining, and wedge angle falls blunt light It slips over and crosses, guarantee surface roughness absolute error is 1.6 um or less;
9)Correction processing:To step 8)Needle selection presser feet after machine-shaping carries out correction process using dedicated tooling, protects The straightness of presser feet working position is demonstrate,proved in 0.02mm or less, obtains straight-bar machines needle selection presser feet finished product.
Traditional straight-bar machines needle selection presser feet production technology due to using linear cutter cut one-pass molding, after first through bending, After the processes such as drilling, carries out final heat treatment and shape sanding and polishing and correction process forms finished product, due to needle selection presser feet shape Relatively thin, especially working position shape is tiny, production shape deformation is easy in the heat treatment process after excision forming, inside is answered The problems such as power is concentrated so that needle selection presser feet poor toughness, service life are short, and breakage phenomenon is often susceptible to during use, Secondary, using manually polishing during shape sanding and polishing, there are appearance and size poor controllabilities, and overlong time of polishing is held It is also easy to produce phenomena such as rubescent, flow harden.Processing technology of the present invention, due to being to have carried out secondary heat treatment to blank, Reduce the deflection of blank, and appearance and size is first increased for the tiny working position of needle selection presser feet, effectively prevents hot place Reason deformation, reduces internal stress concentration, then again to the tiny working position of needle selection presser feet carry out wire cutting precision except material and Blunt processing and working position correction process are machined to appearance profile so that precision, toughness and the presentation quality of needle selection presser feet It is greatly improved, extends the service life of needle selection presser feet, improve the economic value of product, be rear to a certain extent The Quality advance of continuous knitting product provides the foundation.
The present invention can reach following advantageous effect:The present invention has tough using the needle selection presser feet of improved technique productions Good, the with long service life advantage of property, and the bright and new beauty of appearance.
Description of the drawings
Fig. 1 is the structural schematic diagram of straight-bar machines needle selection presser feet of the present invention.
Specific implementation mode
The specific implementation mode of the present invention is described in detail below in conjunction with the accompanying drawings.
As shown in Figure 1, the present invention includes the following steps:
1)Blank forges and presses:By blank by high velocity ram machine punch forming, needle selection presser feet working position shape width dimensions ensure The positive and negative 0.1mm of 8mm;
2)Drilling:By step 1)Stamping forming blank bores fixed mounting hole 1 at two on drill jig, drill for once at Type, and the absolute error of the pitch-row after drilling is ± 0.04mm;
3)Pressing and bending:In step 2)Treated, and blank is placed on progress punching press angle bending processing on bender, protects Bending angle is demonstrate,proved at 30 ° ± 1 °;
4)Heat treatment:First the blank of pressing and bending progress clamping is fixed, then carrying out preheating to the blank fixed will The temperature of blank, which rises to 780 DEG C and keeps the temperature 5min, carries out the pre-heat treatment;Temperature is risen to 1020 DEG C again and keeps the temperature 18min;Then It is cooled to room temperature in still air;
5)Flat stone mill:Planar accurate grinding is carried out using the surface grinding machine of 100 mesh to the upper and lower surface of blank after heat treatment respectively Processing, after flat stone mill, the depth of parallelism ruler upper and lower surfaces of of the blank of the Assurance of Size of upper and lower surface after 1.5mm, planar accurate grinding It is very little to ensure between -0.01~+0.01mm;
6)Tempering heat treatment:First by step 5)Blank after polishing is tempered, and the temperature is 225 DEG C, heat preservation 1.5 hour;
7)Fast wire winding is cut:By step 6)Presser feet working position after temper is clamped in special fixture, removal choosing Needle presser feet working position shape width surplus, between appearance and size ensures 2mm-0.01~+0.01mm, wire travelling speed is 420mm2The surface roughness of/min, acquisition are preferable;
8)Chamfering finishes:To step 7)The needle selection presser feet of machine-shaping carries out chamfer polishing machining, and wedge angle falls blunt light It slips over and crosses, machining uses 6 hard alloy cutter of diameter, rotating speed 4500r/min to feed 1200mm/min, ensures rough surface Degree absolute error is 1.6 um or less;
9)Correction processing:To step 8)Needle selection presser feet after machine-shaping carries out correction process using dedicated tooling, protects The straightness of presser feet working position is demonstrate,proved in 0.02mm or less, obtains straight-bar machines needle selection presser feet finished product.
Product prepared by above scheme reaches 56 degree of Rockwell by hardness determination;After using 1 month, through overground Damage detection, the wear intensity of product are below the half of the product made by traditional handicraft, and the rate of fractureing of product has dropped 98%, production The consistency of product reaches 99% or more, and the surface quality of product improves 1 times, reduces the running noises of whole machine, data system Meter improves 15% production efficiency.
Above-mentioned embodiment is only a preferred solution of the present invention, not the present invention is made in any form Limitation, on the premise of not exceeding the technical scheme recorded in the claims also other variations and modifications.

Claims (1)

1. a kind of straight-bar machines needle selection presser feet production technology, it is characterised in that:The straight-bar machines needle selection presser feet production technology includes following step Suddenly:
1)Blank forges and presses:By blank by high velocity ram machine punch forming;
2)Drilling:By step 1)Treated, and blank bores fixed mounting hole at two on drill jig, drills as one-pass molding, and drills The absolute error of pitch-row afterwards is ± 0.04mm;
3)Pressing and bending:In step 2)Blank after drilling, which is placed on bender, carries out punching press angle bending processing, ensures folding Bending angle is at 30 ° ± 1 °;
4)Heat treatment:By step 3)Blank after pressing and bending carries out clamping and fixes, and is then carried out to the blank fixed pre- Heat, the preheating temperature are 760~810 DEG C, keep the temperature 10~15min;Blank is quenched again, the hardening heat is 1000 ~1050 DEG C, and 10~20min is kept the temperature, then it is cooled to room temperature in still air;
5)Flat stone mill:To step 4)The upper and lower surface of blank after heat treatment carries out planar accurate grinding, the blank after planar accurate grinding Depth of parallelism Assurance of Size upper and lower surfaces of is between -0.01~+0.01mm;
6)Tempering heat treatment:First by step 5)Treated, and blank is fixed in shape-setting clamp tooling, carries out tempering heat treatment, institute It is 200~250 DEG C to state temperature, keeps the temperature 1~3 hour;
7)Fast wire winding is cut:By step 6)Presser feet working position after heat treatment, which is clamped in fixture, carries out blank allowance removal essence Processing, the absolute dimension error on semi-finished product periphery is 0.01mm after cutting, and wire travelling speed is 400~450mm2/min;
8)Chamfering finishes:To step 7)The needle selection presser feet of machine-shaping carries out chamfer polishing machining, and wedge angle falls blunt smooth mistake It crosses, guarantee surface roughness absolute error is 1.6 um or less;
9)Correction processing:To step 8)Needle selection presser feet after machine-shaping carries out correction process using tooling, ensures presser feet work The straightness at position obtains straight-bar machines needle selection presser feet finished product in 0.02mm or less.
CN201611186326.3A 2016-12-20 2016-12-20 A kind of straight-bar machines needle selection presser feet production technology Active CN106624643B (en)

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CN108890305B (en) * 2018-07-21 2021-09-28 林小敏 Automatic processing mechanism for integrated wallboard special buckle
CN111250939B (en) * 2020-03-20 2021-03-19 浙江机电职业技术学院 Needle turning sheet production process
CN111687605B (en) * 2020-06-22 2021-09-07 四川华都核设备制造有限公司 Preparation method of connecting ring chain for control rod system and connecting ring chain
CN111992984A (en) * 2020-07-07 2020-11-27 江苏舒尔驰精密金属成形有限公司 Rapid manufacturing process for new energy laminated busbar sample piece
CN112621123A (en) * 2020-12-08 2021-04-09 新昌县小树林机械科技有限公司 Novel needle selection cam of computerized flat knitting machine and production process

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US2302727A (en) * 1940-02-27 1942-11-24 Hosiery Patents Inc Method of making yarn guide tubes
DE10326524B4 (en) * 2003-06-12 2006-02-23 Saxonia Umformtechnik Gmbh Control anchor plate
CN2858696Y (en) * 2005-12-22 2007-01-17 周武 Computer flat knitting machine
CN101435132B (en) * 2008-12-25 2010-09-29 绍兴市强生精机制造有限公司 Needle bed inlaid piece and method of processing the same
CN101862939A (en) * 2010-04-21 2010-10-20 李大军 Preparation method of aluminum alloy lock panel
CN102310315B (en) * 2011-08-02 2013-02-06 东阳市金艺科技有限公司 Flat machine triangle processing technology

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