CN113953764B - Manufacturing method of connecting rod assembly for high-speed loom - Google Patents
Manufacturing method of connecting rod assembly for high-speed loom Download PDFInfo
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- CN113953764B CN113953764B CN202111240078.7A CN202111240078A CN113953764B CN 113953764 B CN113953764 B CN 113953764B CN 202111240078 A CN202111240078 A CN 202111240078A CN 113953764 B CN113953764 B CN 113953764B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 49
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 84
- 239000010959 steel Substances 0.000 claims abstract description 84
- 238000005520 cutting process Methods 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000003698 laser cutting Methods 0.000 claims abstract description 12
- 238000005498 polishing Methods 0.000 claims abstract description 11
- 238000003825 pressing Methods 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims description 19
- 238000005121 nitriding Methods 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 10
- 238000000227 grinding Methods 0.000 claims description 9
- 150000002500 ions Chemical class 0.000 claims description 7
- 238000004080 punching Methods 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 229910052804 chromium Inorganic materials 0.000 claims description 5
- 239000011651 chromium Substances 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- 229910052698 phosphorus Inorganic materials 0.000 claims description 5
- 239000011574 phosphorus Substances 0.000 claims description 5
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 5
- 150000002910 rare earth metals Chemical class 0.000 claims description 5
- 229910052717 sulfur Inorganic materials 0.000 claims description 5
- 239000011593 sulfur Substances 0.000 claims description 5
- 239000010936 titanium Substances 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 5
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 5
- 230000000712 assembly Effects 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 230000003746 surface roughness Effects 0.000 claims description 4
- 238000005242 forging Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000005245 sintering Methods 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims 1
- 238000005299 abrasion Methods 0.000 abstract description 6
- 238000012827 research and development Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 238000009987 spinning Methods 0.000 description 4
- 239000004753 textile Substances 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
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- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- 239000011487 hemp Substances 0.000 description 1
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Classifications
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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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/56—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.7% by weight of carbon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
- D03C13/00—Shedding mechanisms not otherwise provided for
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The invention provides a manufacturing method of a connecting rod assembly for a high-speed loom, and relates to the technical field of mechanical manufacturing. The manufacturing method comprises the following steps: blanking a steel square tube; straightening the steel square pipe by using a hydraulic press; cutting off the end part of the steel square pipe by using a punch to form an inclined connecting rod and a long connecting rod; the method comprises the steps of (1) respectively manufacturing left and right blades by laser cutting of a steel plate, and polishing the left and right blades; boring the left blade and the right blade by using a boring machine respectively; pressing bearings on the left blade and the right blade by using a hydraulic press; the left blade and the right blade are respectively arranged at two ends of the long connecting rod, one ends of the left blade and the right blade are connected with the inclined connecting rod, and the other ends of the left blade and the right blade are connected with the connecting arm to form the connecting rod assembly. Through research and development improvement to the problems of abrasion, noise and the like generated during high-speed operation of the connecting rod assembly, noise generated at the joint can be reduced, the relative consistency of the gap between the single connecting rods is ensured, the consistency of products is greatly improved, the production cost is reduced, and the production efficiency is improved.
Description
Technical Field
The invention relates to the technical field of machine manufacturing, in particular to a manufacturing method of a connecting rod assembly for a high-speed loom.
Background
The textile machine is a whole name of a tool for processing raw materials such as threads, wires, hemp and the like into threads and then weaving the threads into cloth. Like a spinning pendant, a spinning wheel, a spindle, a pedal loom, a modern mechanical loom, a modern numerical control automatic loom and the like. The connecting rod is an important part for connecting the shedding device and the heald frame on textile machinery, and the currently commonly adopted active shedding device has a monolithic structure made of carbon steel material, and is widely used because of low cost and convenient manufacture.
The Chinese patent application No. CN20090034670. X discloses an opening connecting rod of textile machinery, which is formed by fixedly connecting a rod body and a rod head. The club head is made of a material with better tensile strength, such as: 2Cr13 steel or 1Cr13 steel, 1Cr18Ni9Ti steel and the like, and changes the integrated traditional structure of the connecting rod: the rod body is made of common metal materials, and the rod head is made of materials with better tensile strength, so that 'good steel is used on the cutting edge', the service life of the connecting rod is greatly prolonged, the replacement times are reduced, the cost is reduced, and the production efficiency is improved. However, the existing connecting rod assembly can generate problems such as abrasion, noise and the like during high-speed operation.
Disclosure of Invention
The invention aims to provide a manufacturing method of a connecting rod assembly for a high-speed loom, which solves the problems of abrasion and noise generated by the connecting rod assembly during high-speed operation.
The above object of the present invention can be achieved by the following technical solutions:
The invention provides a manufacturing method of a connecting rod assembly for a high-speed loom, which comprises the following steps:
S1, preparing a steel square tube
Mixing and grinding the raw materials of the steel square tube, heating and melting, pressing the steel square tube into a blank under the pressure of 2-3.5t/cm 2, and sintering and forging the steel square tube at the temperature of 900-1200 ℃ to obtain the steel square tube;
s2, pretreatment of steel square tubes
Straightening a steel square tube by using a hydraulic press, punching two through holes at two ends of the steel square tube by using a punch, cutting two opposite surfaces of the end part of the steel square tube to form a U-shaped opening, manufacturing an inclined connecting rod, punching two through holes at two ends of the other steel square tube by using a punch, cutting the opening at the steel square tube by using the punch, manufacturing a long connecting rod, and polishing and deburring the inclined connecting rod and the long connecting rod;
S3, manufacturing left and right blades
A1. Cutting the steel plate by using a laser cutting machine to respectively obtain left and right blades, wherein the left and right blades are in a flat plate shape, the edges of the left and right blades are provided with chamfers, and the cut edges are subjected to deburring, oxide removal and surface grinding treatment;
a2. Mounting the left blade and the right blade on a fixed seat of a boring machine, starting the boring machine to process a first through hole of the left blade and the right blade, adjusting the fixed seat of the boring machine, repeating the steps until boring of one left blade and the right blade is completed, replacing the left blade and the right blade, and repeating the steps until boring of all the left blade and the right blade is completed;
s4, assembling connecting rod assembly
B1. Pressing bearings on the left blade and the right blade by using a hydraulic press: fixing the left blade and the right blade, placing the sleeve on the outer ring of the bearing, applying force on the sleeve by a press, and press-fitting the bearing into the inner holes of the left blade and the right blade, so that the center lines of a hydraulic press rod and the press head are kept coincident with the center line of the mounting sleeve and the center line of the inner holes of the left blade and the right blade;
b2. The left blade and the right blade are respectively arranged at two ends of the long connecting rod, one ends of the left blade and the right blade are connected with the inclined connecting rod, and the other ends of the left blade and the right blade are connected with the connecting arm to form the connecting rod assembly.
In some embodiments of the present invention, after step S4, a plurality of link assemblies are connected through a rotation shaft to form a link member, a connection seat is fixed on the link member, and the connection seat is rotatably connected with an intermediate holder, and the intermediate holder is a connection rod having through holes at both ends.
In some embodiments of the invention, the laser cut has a kerf precision of 0.1-0.3 mm and a kerf surface roughness of 10-20 microns, and the laser cut power is 1000W-1500W and the pulse frequency is 80Hz-100Hz.
In some embodiments of the present invention, the steel square tube raw materials include the following raw materials in parts by weight: 3.8-8.8 parts of carbon, 80-88 parts of iron, 6.2-6.9 parts of manganese, 1.2-1.6 parts of chromium, 8.4-12.5 parts of nickel, 10-19 parts of aluminum, 1.5-2.7 parts of titanium, 1.25-1.55 parts of phosphorus, 1.2-2.5 parts of sulfur, 1.1-1.9 parts of zinc stearate and 60-72 parts of rare earth.
In some embodiments of the invention, the thickness of the left and right blades is less than the difference between the height of the steel square tube minus the wall thickness.
In some embodiments of the present invention, the step S2 is preceded by a wear-resistant reinforcing treatment of the steel square tube, including: the inner and outer surfaces of the steel square tube are subjected to oil removal, cleaning and drying treatment, and the outer surface is subjected to polishing treatment.
In some embodiments of the invention, after the polishing treatment, the steel square tube is heated for 5-15min at 300-350 ℃ to form an oxide layer, and the steel square tube is heated in an ion nitriding furnace to form a wear-resistant layer.
In some embodiments of the present invention, the steel square tube raw materials include the following raw materials in parts by weight: in the step a2, the plane of the left blade and the right blade is vertical to the boring machine main shaft, and the axis of the first through hole of the left blade and the right blade is parallel to the boring machine main shaft.
In some embodiments of the invention, the heating temperature is 300-350 ℃, the condition of the ion nitriding furnace is that nitriding gas is NH3, glow voltage is 800-900V, current is 12-15A, vacuum degree in the furnace is 110-120Pa, nitriding temperature is 310-360 ℃, and nitriding time is 10 hours.
In some embodiments of the present invention, the steel square tube raw materials include the following raw materials in parts by weight: 5.8 parts of carbon, 84 parts of iron, 6.2-6.9 parts of manganese, 1.4 parts of chromium, 10 parts of nickel, 14 parts of aluminum, 1.5 parts of titanium, 1.25 parts of phosphorus, 1.2 parts of sulfur, 1.1 parts of zinc stearate and 60 parts of rare earth.
In some embodiments of the invention, the steel square tube raw material is mixed and ground to a particle size of 50-80 meshes, and then heated at a heating temperature of 800-900 ℃ for 20-30min.
The manufacturing method of the connecting rod assembly for the high-speed loom has the characteristics and advantages that:
According to the invention, the steel square pipe is subjected to blanking, the steel square pipe is straightened by a hydraulic press, the end part of the steel square pipe is cut off to form an opening by a punch press, an inclined connecting rod is manufactured, the opening is cut off by the punch press on the steel square pipe, a long connecting rod is manufactured, a steel plate is cut by laser to respectively manufacture left and right blades, the left and right blades are polished, and boring is carried out on the left and right blades by a boring machine; the hydraulic press is used for pressing the bearings on the left blade and the right blade, the left blade and the right blade are respectively arranged at the two ends of the long connecting rod, one ends of the left blade and the right blade are connected with the inclined connecting rod, the other ends of the left blade and the right blade are connected with the connecting arm, a connecting rod assembly is formed, development and improvement are carried out on the problems of abrasion, noise and the like generated when the connecting rod assembly runs at a high speed, the manufacturing method of the connecting rod assembly for the high-speed loom is developed, the noise generated at the connecting position can be reduced, the relative consistency of the gap between single connecting rods is ensured, the consistency of products is greatly improved, the production cost is reduced, and the production efficiency is improved.
Detailed Description
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Embodiment one:
the embodiment of the invention provides a manufacturing method of a connecting rod assembly for a high-speed loom, which comprises the following steps:
(1) Discharging a steel square tube, wherein the steel square tube can adopt a Q345B square tube;
(2) Straightening the steel square tube by utilizing a hydraulic press;
(3) Cutting off the end part of the steel square pipe by using a punch to form an inclined connecting rod, cutting off the end part of the steel square pipe by using the punch to form a long connecting rod;
(4) The steel plate is cut by laser to respectively manufacture left and right blades, and the left and right blades are polished;
(5) Boring the left blade and the right blade by using a boring machine respectively;
(6) Pressing bearings on the left blade and the right blade by using a hydraulic press;
(7) The left blade and the right blade are respectively arranged at two ends of the long connecting rod, one ends of the left blade and the right blade are connected with the inclined connecting rod, and the other ends of the left blade and the right blade are connected with the connecting arm to form the connecting rod assembly. The method for manufacturing the connecting rod assembly for the high-speed loom is developed aiming at the problems of abrasion, noise and the like generated during high-speed operation of the connecting rod assembly, and can reduce noise generated at the joint, ensure that the gap between single connecting rods is relatively consistent, greatly improve the consistency of products, reduce the production cost and improve the production efficiency.
Embodiment two:
the embodiment of the invention provides a manufacturing method of a connecting rod assembly for a high-speed loom, which comprises the following steps:
(1) Blanking a steel square tube;
(2) Straightening the steel square tube by utilizing a hydraulic press;
(3) Respectively punching two through holes at two ends of a steel square tube by using a punch press, connecting the through holes with a bearing through a shaft rod, cutting off two opposite surfaces of the end part of the steel square tube to form a U-shaped opening to form an inclined connecting rod, respectively punching two through holes at two ends of the other steel square tube by using the punch press, cutting off the opening at the steel square tube by using the punch press to form a long connecting rod, and polishing and deburring the inclined connecting rod and the long connecting rod;
(4) The method comprises the steps of respectively manufacturing left and right blades by laser cutting a steel plate, wherein the left and right blades are in a flat plate shape, and the edges of the left and right blades are provided with chamfers, and performing deburring, oxide removal and surface grinding treatment;
(5) Mounting left and right blades on a fixed seat of a boring machine, ensuring that the plane of the left and right blades is perpendicular to a main shaft of the boring machine, enabling the axis of a first through hole of the left and right blades to be parallel to the main shaft of the boring machine, starting the boring machine to process the first through hole of the left and right blades, adjusting the fixed seat of the boring machine, repeating the steps until boring of one left and right blade is completed, replacing the left and right blades, and repeating the steps until boring of all the left and right blades is completed;
(6) Pressing bearings on the left blade and the right blade by using a hydraulic press: fixing the left blade and the right blade, placing the sleeve on the outer ring of the bearing, applying force on the sleeve by a press, press-fitting the bearing into the inner holes of the left blade and the right blade, and when the bearing is installed, taking care to keep the central lines of a hydraulic press rod and a pressing head coincident with the central line of the installation sleeve and the central line of the inner holes of the left blade and the right blade so as to prevent the installation sleeve or the bearing from inclining;
(7) The two ends of the long connecting rod are provided with a left blade and a right blade, one end of the left blade and one end of the right blade are connected with the inclined connecting rod, and the other end of the left blade and the right blade are connected with the connecting arm to form a connecting rod assembly;
(8) The connecting rod assemblies are connected through the rotating shafts to form the connecting rod parts, the connecting seats are fixed on the connecting rod parts and are rotationally connected with the middle retaining pieces, and the middle retaining pieces are connecting rods with through holes at two ends, so that the connecting rod is favorable for being assembled on a spinning machine to be produced and used.
Wherein, the cutting precision of the left and right blades of the laser cutting is 0.1-0.3 mm, the surface roughness of the cut is 10-20 microns, the laser cutting power is 1000W-1500W, and the pulse frequency is 80Hz-100Hz.
The thickness of the left and right blades is smaller than the difference between the height of the steel square tube and the wall thickness, so that the left and right blades can be conveniently installed in the end opening of the steel square tube.
Embodiment III:
the embodiment of the invention provides a manufacturing method of a connecting rod assembly for a high-speed loom, which comprises the following steps:
(1) Discharging steel square tube
A1, weighing the following raw materials in parts by weight: the steel square pipe raw materials comprise the following raw materials in parts by weight: 3.8-8.8 parts of carbon, 80-88 parts of iron, 6.2-6.9 parts of manganese, 1.2-1.6 parts of chromium, 8.4-12.5 parts of nickel, 10-19 parts of aluminum, 1.5-2.7 parts of titanium, 1.25-1.55 parts of phosphorus, 1.2-2.5 parts of sulfur, 1.1-1.9 parts of zinc stearate and 60-72 parts of rare earth.
A2, mixing and grinding the raw materials, and then compacting under the conditions of heating temperature of 800-900 ℃ for 20-30min, melting and pressure of 2-3.5t/cm < 2 >, sintering and forging at 900-1200 ℃ to prepare a steel square tube, wherein the granularity of the mixed grinding is 50-80 meshes;
A3, degreasing, cleaning and drying the inner and outer surfaces of the steel square tube, polishing the outer surface, heating for 5-15min at the temperature of 300-350 ℃ to form an oxidation layer, and heating the steel square tube in an ion nitriding furnace to form an abrasion-resistant layer, wherein the heating temperature is 350 ℃, the condition of the ion nitriding furnace is that nitriding gas is NH3, glow voltage is 900V, current is 15A, the vacuum degree in the furnace is 120Pa, the nitriding temperature is 360 ℃, and the nitriding time is 10h;
In this example, the following raw materials were specifically weighed in parts by weight: 5.8 parts of carbon, 84 parts of iron, 6.2-6.9 parts of manganese, 1.4 parts of chromium, 10 parts of nickel, 14 parts of aluminum, 1.5 parts of titanium, 1.25 parts of phosphorus, 1.2 parts of sulfur, 1.1 parts of zinc stearate and 60 parts of rare earth;
(2) Straightening the steel square tube by utilizing a hydraulic press; carrying out wear-resisting strengthening treatment on the steel square tube, comprising: the inner surface and the outer surface of the steel square tube are subjected to oil removal, cleaning and drying treatment, the outer surface of the steel square tube is subjected to polishing treatment, the steel square tube is heated for 5-15min at the temperature of 300-350 ℃ to form an oxidation layer, the steel square tube is heated in an ion nitriding furnace to form a wear-resistant layer, and the wear resistance of the steel square tube is further improved;
(3) Cutting off the opening at the end part of the steel square pipe by using a punch press to manufacture an inclined connecting rod, cutting off the opening at the steel square pipe by using the punch press, and manufacturing a long connecting rod: cutting off two opposite surfaces of the end part of the steel square tube by using a punch to form a U-shaped opening to manufacture an inclined connecting rod and a long connecting rod, punching two through holes at two ends of the inclined connecting rod and the long connecting rod respectively, wherein the through holes are used for connecting bearings through shaft rods and polishing and deburring the inclined connecting rod and the long connecting rod;
(4) The left blade and the right blade are respectively manufactured by laser cutting the steel plate, and the left blade and the right blade are polished: the left blade and the right blade are respectively manufactured by laser cutting the steel plate, the left blade and the right blade are in a flat plate shape, the edges of the left blade and the right blade are provided with chamfers, and the surfaces of the left blade and the right blade are subjected to deburring, oxide scale removal and surface grinding treatment. The cutting precision of the left blade and the right blade of the laser cutting is 0.1-0.3 mm, the surface roughness of the cut is 10-20 microns, the laser cutting power is 1000W-1500W, and the pulse frequency is 80Hz-100Hz;
(5) Boring the left blade and the right blade by using a boring machine respectively: mounting left and right blades on a fixed seat of a boring machine, ensuring that the plane of the left and right blades is perpendicular to a main shaft of the boring machine, enabling the axis of a first through hole of the left and right blades to be parallel to the main shaft of the boring machine, starting the boring machine to process the first through hole of the left and right blades, adjusting the fixed seat of the boring machine, repeating the steps until boring of one left and right blade is completed, replacing the left and right blades, and repeating the steps until boring of all the left and right blades is completed;
(6) Pressing bearings on the left blade and the right blade by using a hydraulic press: fixing the left blade and the right blade, placing the sleeve on the outer ring of the bearing, applying force on the sleeve by a press, press-fitting the bearing into the inner holes of the left blade and the right blade, and when the bearing is installed, taking care to keep the central lines of a hydraulic press rod and a pressing head coincident with the central line of the installation sleeve and the central line of the inner holes of the left blade and the right blade so as to prevent the installation sleeve or the bearing from inclining;
(7) The two ends of the long connecting rod are provided with a left blade and a right blade, one end of the left blade and one end of the right blade are connected with the inclined connecting rod, and the other end of the left blade and the right blade are connected with the connecting arm to form a connecting rod assembly;
(8) Connecting a plurality of connecting rod assemblies through rotating shafts to form connecting rod components;
(9) The connecting seat is fixed on the connecting rod part, the connecting seat is rotationally connected with the middle retaining piece, and the middle retaining piece is a connecting rod with through holes at two ends, so that the connecting rod is favorable for being assembled on a spinning machine for production and use.
The method for manufacturing the connecting rod assembly can reduce noise generated at the connecting position of the connecting rod, ensure that the gap between single connecting rods is relatively consistent, greatly improve the consistency of products, reduce the production cost and improve the production efficiency.
Table one: detection result of thickness mean value of each part
Note that: wherein the thickness average value is the thickness average value of two sides of the opening of the steel square tube.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. A manufacturing method of a connecting rod assembly for a high-speed loom is characterized by comprising the following steps of: the method comprises the following steps:
S1, preparing a steel square tube
Mixing and grinding steel square tube raw materials, and then compacting under the pressure of 2-3.5 t/cm 2, sintering at 900-1200 ℃ and forging to obtain the steel square tube, wherein the steel square tube raw materials comprise the following raw materials in parts by weight: 3.8-8.8 parts of carbon, 80-88 parts of iron, 6.2-6.9 parts of manganese, 1.2-1.6 parts of chromium, 8.4-12.5 parts of nickel, 10-19 parts of aluminum, 1.5-2.7 parts of titanium, 1.25-1.55 parts of phosphorus, 1.2-2.5 parts of sulfur, 1.1-1.9 parts of zinc stearate and 60-72 parts of rare earth;
s2, pretreatment of steel square tubes
Straightening a steel square tube by using a hydraulic press, punching two through holes at two ends of the steel square tube by using a punch, cutting two opposite surfaces of the end part of the steel square tube to form a U-shaped opening, manufacturing an inclined connecting rod, punching two through holes at two ends of the other steel square tube by using a punch, cutting the opening at the steel square tube by using the punch, manufacturing a long connecting rod, and polishing and deburring the inclined connecting rod and the long connecting rod;
S3, manufacturing left and right blades
A1. Cutting the steel plate by using a laser cutting machine to respectively obtain left and right blades, wherein the left and right blades are in a flat plate shape, the edges of the left and right blades are provided with chamfers, and the cut edges are subjected to deburring, oxide removal and surface grinding treatment;
a2. Mounting the left blade and the right blade on a fixed seat of a boring machine, starting the boring machine to process a first through hole of the left blade and the right blade, adjusting the fixed seat of the boring machine, repeating the steps until boring of one left blade and the right blade is completed, replacing the left blade and the right blade, and repeating the steps until boring of all the left blade and the right blade is completed;
s4, assembling connecting rod assembly
B1. Pressing bearings on the left blade and the right blade by using a hydraulic press: fixing the left blade and the right blade, placing the sleeve on the outer ring of the bearing, applying force on the sleeve by a press, and press-fitting the bearing into the inner holes of the left blade and the right blade, so that the center lines of a hydraulic press rod and the press head are kept coincident with the center line of the mounting sleeve and the center line of the inner holes of the left blade and the right blade;
b2. The left blade and the right blade are respectively arranged at two ends of the long connecting rod, one ends of the left blade and the right blade are connected with the inclined connecting rod, and the other ends of the left blade and the right blade are connected with the connecting arm to form the connecting rod assembly.
2. The method for manufacturing the connecting rod assembly for the high-speed loom according to claim 1, wherein: and after the step S4, connecting a plurality of connecting rod assemblies through rotating shafts to form connecting rod components, fixing a connecting seat on the connecting rod components, and rotationally connecting a middle retainer by the connecting seat, wherein the middle retainer is a connecting rod with through holes at two ends.
3. The method for manufacturing the connecting rod assembly for the high-speed loom according to claim 1, wherein: the cutting precision of the left blade and the right blade cut by the laser cutting machine is 0.1-0.3 mm, the surface roughness of the cut is 10-20 microns, the power of the laser cutting machine is 1000W-1500W, and the pulse frequency is 80Hz-100Hz.
4. The method for manufacturing the connecting rod assembly for the high-speed loom according to claim 1, wherein: in the step a2, the plane of the left blade and the right blade is vertical to the boring machine main shaft, and the axis of the first through hole of the left blade and the right blade is parallel to the boring machine main shaft.
5. The method for manufacturing the connecting rod assembly for the high-speed loom according to claim 1, wherein: the thickness of the left blade and the right blade is smaller than the difference between the height of the steel square tube and the wall thickness.
6. The method for manufacturing the connecting rod assembly for the high-speed loom according to claim 1, wherein: and S2, carrying out wear-resisting reinforcement treatment on the steel square pipe before the step, wherein the method comprises the following steps: the inner and outer surfaces of the steel square tube are subjected to oil removal, cleaning and drying treatment, and the outer surface is subjected to polishing treatment.
7. The method for manufacturing the connecting rod assembly for the high-speed loom according to claim 6, wherein: and after the polishing treatment, heating for 5-15min to form an oxide layer, and heating the steel square tube in an ion nitriding furnace to form a wear-resistant layer.
8. The method for manufacturing the link assembly for the high-speed loom according to claim 7, wherein: the heating temperature is 300-350 ℃, the condition of the ion nitriding furnace is that nitriding gas is NH 3, glow voltage is 800-900V, current is 12-15A, the vacuum degree in the furnace is 110-120Pa, the nitriding temperature is 310-360 ℃, and the nitriding time is 10h.
9. The method for manufacturing the connecting rod assembly for the high-speed loom according to claim 1, wherein: the granularity of the mixed grinding of the steel square tube raw materials is 50-80 meshes, and then the steel square tube raw materials are heated for 20-30min under the condition that the heating temperature is 800-900 ℃.
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| FR2746683B1 (en) * | 1996-03-29 | 1998-04-30 | Ascoforge Safe | METHOD FOR MANUFACTURING A FORGED CONNECTING ROD BLANK |
| CN201258386Y (en) * | 2008-09-16 | 2009-06-17 | 朱奕 | Multi-cycle opening mechanism for air-jet loom |
| CN104153110A (en) * | 2014-07-31 | 2014-11-19 | 扬中市金德纺织机械设备厂 | Connecting rod assembly of high-speed weaving machine |
| CN204023133U (en) * | 2014-08-11 | 2014-12-17 | 张东明 | Weaving loom weft cutter cam connecting rod |
| CN107160504A (en) * | 2017-05-18 | 2017-09-15 | 张家港市瑞寅精密机械有限公司 | A kind of carpenter's plane and its forging production technique |
| CN208050692U (en) * | 2018-03-20 | 2018-11-06 | 无锡亿臻机械有限公司 | Interlinking lever end cropping/punching die |
| CN209477388U (en) * | 2018-12-25 | 2019-10-11 | 无锡亿臻机械有限公司 | Textile machine connecting lever end U-lag milling attachment |
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| CN106670375A (en) * | 2016-11-28 | 2017-05-17 | 重庆万斯金属特种成形有限公司 | Forging method for gasoline engine connecting rod |
| CN213681082U (en) * | 2020-09-23 | 2021-07-13 | 浙江泰坦股份有限公司 | Novel loom opening connecting rod blade |
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