CN110961871A - Nut machining process - Google Patents
Nut machining process Download PDFInfo
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- CN110961871A CN110961871A CN201911338021.3A CN201911338021A CN110961871A CN 110961871 A CN110961871 A CN 110961871A CN 201911338021 A CN201911338021 A CN 201911338021A CN 110961871 A CN110961871 A CN 110961871A
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- 238000010521 absorption reaction Methods 0.000 claims abstract description 36
- 238000012545 processing Methods 0.000 claims abstract description 19
- 238000010079 rubber tapping Methods 0.000 claims abstract description 18
- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 238000004140 cleaning Methods 0.000 claims abstract description 12
- 238000005491 wire drawing Methods 0.000 claims abstract description 11
- 238000000137 annealing Methods 0.000 claims abstract description 10
- 238000005516 engineering process Methods 0.000 claims abstract description 10
- 238000011282 treatment Methods 0.000 claims abstract description 10
- 238000004381 surface treatment Methods 0.000 claims abstract description 7
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- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 6
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The invention relates to the technical field of fastener processing, and discloses a nut processing technology which comprises the steps of pickling, wire drawing, spheroidizing annealing treatment, cold heading forming, deoiling treatment, tapping, cleaning, checking and surface treatment; the deoiling treatment is to place the nut body into a deoiling mechanism for deoiling, the deoiling mechanism comprises a rack, a receiving bin, a conveying assembly and an oil absorption assembly, the receiving bin is arranged on the rack and comprises a discharge port and a feed port communicated with an outlet of a cold header, two filter plates are respectively hinged on two opposite side walls of the receiving bin, a driving assembly for driving the two filter plates to open or close the discharge port is arranged on the receiving bin, an oil guide plate is arranged below the discharge port, and a pushing cylinder connected with the oil guide plate is arranged on the rack; one end of the conveying assembly is located below the discharge port, and the oil absorption assembly is located on the upper side of the conveying assembly. The invention has the effects of effectively collecting oil on the surface of the nut body after cold heading, and avoiding pollution and resource waste.
Description
Technical Field
The invention relates to the technical field of fastener processing, in particular to a nut processing technology.
Background
The nut is a part which is screwed together with a bolt or a screw rod to play a role of fastening, is used for being in threaded connection with the bolt or the screw rod, is commonly used on various precision parts, cabinets and automobile components, and can be divided into carbon steel, stainless steel, nonferrous metal and other types according to different materials.
In the prior art, chinese patent publication No. CN104308459A discloses a nut processing process, which includes the following steps: 1) cold heading the raw material by a cold heading machine to form the corners of the nut body full and consistent; 2) punching a through hole in the center of the nut body by using a cold header; 3) processing internal threads in a central hole of the nut body by using a tapping machine to form a nut; 4) putting the nut into a high-temperature furnace, controlling the temperature of the furnace below 500 ℃, then heating to 800 ℃ at the rate of 50-100 ℃ per hour, and keeping the temperature for 3-4 hours; 5) naturally cooling for 2-3 hours. The nut produced by the invention has the advantages of compression resistance, wear resistance and long service life.
The above prior art solutions have the following drawbacks: the cold header is a forging method for upsetting and forming a metal bar at normal temperature by utilizing a die, is cold machining, and can release a large amount of heat in the machining process, so that a large amount of lubricating oil is required to participate in the working process of the cold header. After the cold heading is completed, the formed nut body can be output from a cold heading machine by a conveying mechanism, the process of deoiling the nut body after the cold heading is not arranged in the nut processing technology, the existing conveying mechanism is usually an inclined plate or a box body with a leakage hole, oil on the surface of the nut body output from the cold heading machine cannot be effectively collected, and the oil is easy to drip to a rack or the ground when the nut body is transferred, so that pollution and resource waste are caused, and the improvement is needed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a nut processing technology which has the effects of effectively collecting oil on the surface of a nut body after cold heading, and avoiding pollution and resource waste.
The above object of the present invention is achieved by the following technical solutions: a nut machining process comprises the following steps:
s1, acid washing: soaking the wire material in 10-12% hydrochloric acid solution for 10-15min, cleaning with clear water, and oven drying;
s2, drawing: drawing the wire rod after acid washing by a wire drawing machine to form a linear blank with a preset diameter, and winding the linear blank into a coil;
s3, spheroidizing annealing: heating the blank to 730-740 ℃, preserving heat for 3-4 hours, then slowly cooling to 650-700 ℃ at the speed of less than 20 ℃/h, keeping for 4-5 hours, and naturally cooling to normal temperature after discharging;
s4, cold heading forming: placing the blank subjected to spheroidizing annealing into a cold header body for cold heading to obtain a nut body with full and consistent corners and a through hole punched in the center;
s5, deoiling treatment: the method comprises the following steps of putting a cold-heading formed nut body into a deoiling mechanism for deoiling, wherein the deoiling mechanism comprises a rack, a receiving bin, a conveying assembly and an oil absorption assembly, the receiving bin is arranged on the rack and comprises a discharge port and a feed port communicated with an outlet of a cold heading machine, two opposite side walls of the receiving bin are respectively hinged with a filter plate, the receiving bin is provided with a driving assembly for driving the two filter plates to open or close the discharge port, an oil guide plate is arranged below the discharge port, and the rack is provided with a pushing cylinder for driving the oil guide plate to move close to or far away from the discharge port; one end of the conveying assembly is positioned right below the discharge hole, and the oil absorption assembly is positioned on the upper side of the conveying assembly;
s6, tapping: putting the deoiled nut body into a tapping machine for tapping so as to machine internal threads on the inner wall of the through hole;
s7, cleaning: putting the tapped nut body into a centrifugal device for cleaning to remove oil stains and impurities on the surface of the nut body;
s8, checking: checking whether the external dimension of the nut body reaches the standard through a vernier caliper, and checking whether the internal thread of the nut body has defects through naked eyes and a bolt;
s9, surface treatment: and immersing the qualified nut body after inspection into an aqueous solution containing a precipitated metal compound, wherein metal substances precipitated from the aqueous solution after electrification are attached to the surface of the nut body to form an antirust layer.
By adopting the technical scheme, the acid washing can remove the oxide film on the surface of the wire raw material, and the lubricating property of the wire is improved, so that the scratches on the surface of the wire during processing are reduced; the wire drawing after the pickling can draw the wire raw material into a preset diameter, and people can replace wire drawing dies with different diameters according to the size requirement of the processing during the drawing, so that a wire blank with a certain diameter is formed, the wire after the drawing is relatively straight, the size of the wire is relatively equal, and the wire drawing is beneficial to subsequent processing. The spheroidizing annealing treatment can ensure that the wire rod blank is cooled after being heated at high temperature, so that the toughness of the blank is improved, and the quality of a processed product is improved; after the blank is cooled to normal temperature, the blank is formed into a nut body with a through hole reserved in the middle by using a cold header body, a large amount of lubricating oil needs to be injected when the cold header body is processed, the nut body needs to be transmitted to a deoiling mechanism for deoiling after cold header, and the lubricating oil separated from the nut body is collected by an oil box so as to be reused; and then, machining internal threads in the through hole of the nut body by using a tapping machine so as to enable the internal threads to be matched with the threads of the bolt. The residual waste material, greasy dirt and impurity on nut body surface can be washed clean in centrifugal device after the tapping, then whether the appearance of inspection nut body is up to standard, the internal thread is defect or not to the processingquality of monitoring nut avoids the defective work to dispatch from the factory, and qualified nut body carries out surface treatment after the detection, makes nut body surface form the antirust coat, has further improved the quality of nut body, and reprocessed after unqualified nut body is collected.
When deoiling is handled, utilize two filter plate of drive assembly drive earlier to seal the discharge gate, lead the oiled-plate to move under the discharge gate, the nut body after the cold-heading shaping is transmitted to the feed inlet of receiving the feed bin from the export of cold heading machine body, again along receiving on the feed bin falls to two filter, places a period, the lubricating oil on nut body surface can pass the filter under self action of gravity, then drips and flows into oil box on leading the oiled-plate and be collected. The push cylinder is recycled to drive the oil guide plate to move to one side far away from the discharge port, the drive assembly is utilized to enable the filter plate to open the discharge port, the nut body can drop onto the conveying assembly, and the oil absorption assembly absorbs oil on the surface of the nut body at last so that oil on the surface of the nut is cleaned up, the oil cannot drop everywhere during subsequent transportation, pollution and resource waste cannot be caused, and the effect of clean production is achieved.
The invention is further configured to: the driving assembly comprises driving cylinders arranged on two opposite side walls of the material collecting bin, and piston rods of the two driving cylinders are hinged with the free ends of the two filter plates after penetrating through the material collecting bin respectively.
Through adopting above-mentioned technical scheme, when closing the discharge gate, extend two piston rods that drive actuating cylinder simultaneously for two filters rotate to one side near each other, and two piston rods that drive actuating cylinder extend the longest, and two filters butt each other and seal the discharge gate. When the discharge port is opened, the two piston rods driving the air cylinders are shortened, and the two filter plates rotate towards one side away from each other, so that a gap for the nut body to fall is formed between the two filter plates. The manual operation is not needed when the discharge port is closed or opened, the automation degree is high, and the operation is convenient.
The invention is further configured to: at least two gas springs are hinged to two opposite inner walls of the material receiving bin respectively, and piston rods of the gas springs are hinged to the filter plates close to the gas springs; when the piston rod of each air spring extends simultaneously, the two filter plates seal the discharge port.
Through adopting above-mentioned technical scheme, the piston rod of air spring extends when the discharge gate is opened, plays the effect of auxiliary stay filter, has alleviateed the bearing burden that drives actuating cylinder piston rod. The piston rod of the gas spring is shortened when the discharge port is closed, so that the filter plate is kept in a state of opening the discharge port, and the stability of the filter plate is improved.
The invention is further configured to: and the material collecting bin is provided with a vibrating machine.
Through adopting above-mentioned technical scheme, when the nut body dropped to the filter, start the bobbing machine for receiving storehouse and filter production slight vibrations, be favorable to the fluid on nut body surface to drip, shortened the stationary time, improved machining efficiency.
The invention is further configured to: receive the feed bin and be connected with the stirring subassembly that is located directly over the discharge gate, the stirring subassembly is including installing at the agitator motor who receives the feed bin outer wall, (mixing) shaft and the circumference setting a plurality of stirring rakes in the (mixing) shaft bottom with agitator motor's output shaft fixed connection, the stirring rake stretches into and receives in the feed bin and is located the top of filter.
Through adopting above-mentioned technical scheme, the nut body is placed a period of time back on the filter, opens agitator motor and rotates in order to drive the (mixing) shaft for the stirring rake stirs the nut body so that the oil glue between two nut bodies and influence fluid drippage, has further improved deoiling efficiency.
The invention is further configured to: the oil guide plate is arc-shaped, the lower end of the oil guide plate extends into the oil box, edges of two opposite side walls of the oil guide plate are integrally formed with edges, and the edges extend from the oil guide plate to one side close to the material receiving bin.
Through adopting above-mentioned technical scheme, the oil guide plate is the arcuation and more is favorable to the collection that flows of fluid, can restrict lubricating oil from the both sides of oil guide plate along the limit and flow out, has improved the rate of recovery of fluid.
The invention is further configured to: the conveying assembly comprises a driving wheel, a driven wheel, a servo motor and a conveying belt, wherein the driving wheel is rotatably connected to the rack, the servo motor is fixedly connected with the output shaft and the driving wheel, the two ends of the conveying belt are respectively sleeved on the driving wheel and the outer side of the driven wheel, the conveying belt is a magnetic soft belt, and one end of the conveying belt is located under the discharge port.
Through adopting above-mentioned technical scheme, the nut body falls to the conveyer belt after the discharge gate is followed on, servo motor's output shaft can drive the action wheel and rotate, and then makes from driving wheel and conveyer belt removal for the nut body is transmitted to the one side of keeping away from the receipts feed bin by the conveyer belt. Because the conveyer belt is the soft area of magnetism, and the nut body is metal material, can attract with the nut body when the nut body falls to the conveyer belt for the difficult and conveyer belt separation of nut body, stability when the nut body transmits is high.
The invention is further configured to: the rack is provided with a plurality of pushing assemblies distributed along the length direction of the conveyor belt, each pushing assembly comprises a pushing cylinder and a push plate fixedly connected with a piston rod of the pushing cylinder, and the distance between each push plate and the conveyor belt is larger than the thickness of a single nut body and smaller than the sum of the thicknesses of two nut bodies when the nut bodies are stacked; the push plate moves along the width direction of the conveyor belt under the action of the material pushing cylinder, and a baffle fixed on the rack is arranged on one side, away from the material pushing cylinder, of the conveyor belt.
By adopting the technical scheme, after the nut bodies fall to the conveyor belt, the piston rods of the pushing assemblies are sequentially extended, so that the nut bodies on the upper layer are spread along the width direction of the conveyor belt by the push plate, the contact area between each nut body and the oil absorption assembly is increased, and the oil absorption effect is good. The baffle can restrict the nut body and be pushed away when pushing away material subassembly work and fall, plays the effect of keeping off the material.
The invention is further configured to: the conveyer belt is kept away from one side that pushes away the material cylinder and still is equipped with the subassembly of spreading out that the length direction of multiunit edge conveyer belt distributes, the subassembly of spreading out is including rack-mounted spreading out the cylinder and with the piston rod fixed connection's of spreading out the board of spreading out, the direction of motion of the board of spreading out forms acute angle or obtuse angle with the transmission direction of conveyer belt.
Through adopting above-mentioned technical scheme, if the nut body of once whereabouts is too much, push away the material subassembly and promote the back with the nut body to the one side that is close to the baffle, partial nut body can pile up the one end that is close to the baffle at the conveyer belt. And then the flattening cylinder is used for driving the flattening plate to obliquely push the nut body, so that the upper-layer nut body close to the baffle plate moves to one side close to the material pushing cylinder, and the spreading of the nut body is facilitated.
The invention is further configured to: the oil absorption subassembly is including being fixed in the oil absorption frame in the frame, install lift cylinder on the oil absorption frame, with the fixed mounting panel that links to each other of piston rod of lift cylinder and paste the bonding at the mounting panel near the sponge of conveyer belt one side through the magic, the piston rod of lift cylinder passes oil absorption frame and sets up down, the terminal surface that the sponge is close to the conveyer belt is fixed with the oil absorption and wipes cloth.
Through adopting above-mentioned technical scheme, the nut body is spread out behind the conveyer belt, and the piston rod extension with lift cylinder moves down in order to promote the mounting panel for the surface contact of sponge and nut body, the conveyer belt can drive the relative sponge of nut body and remove, thereby makes the sponge clean the remaining fluid in nut body surface, and the main material of oil absorption wiping cloth is the polypropylene melt-blown non-woven fabrics, has fine oil absorption performance and repeatedly usable after wasing, has improved the oil absorption effect of oil absorption subassembly. Because the mounting plate is connected with the sponge through the magic tape, after the oil absorption wiping cloth is used for a period of time, people can disassemble the sponge and the mounting plate to replace new sponge and oil absorption wiping cloth.
In summary, the invention includes at least one of the following beneficial technical effects:
1. the linear blank is automatically processed into the nut body by sequentially carrying out the steps of pickling, wire drawing, spheroidizing annealing treatment, cold heading forming, deoiling treatment, tapping, cleaning, checking and surface treatment, the formed nut has high toughness and good quality, and the deoiling mechanism can effectively collect oil on the surface of the cold-headed nut body, so that pollution and resource waste are avoided;
2. the two filter plates can rotate oppositely or reversely under the action of the two driving cylinders respectively, so that the discharge port is opened or closed, the nut body output from the cold header body is firstly placed on the filter plates during deoiling, so that oil on the surface of the nut body is collected after dropping to the oil guide plate, and the vibrating machine plays a role in improving the oil dropping efficiency;
3. the pushing assembly and the spreading assembly can push away the nut body falling onto the conveyor belt, so that the contact area of the nut body and the oil absorption wiping cloth is increased, and the oil absorption effect is good; the conveyer belt is the soft area of magnetism and makes the nut body of lower floor be difficult for relative conveyer belt removal, stability when having improved nut body transmission.
Drawings
FIG. 1 is a process flow diagram of the present example;
FIG. 2 is a schematic structural view of the deoiling mechanism in the present embodiment;
FIG. 3 is a schematic sectional view of the receiving bin in this embodiment;
FIG. 4 is a partial schematic view highlighting the transfer assembly and oil absorption assembly of the present embodiment;
fig. 5 is an enlarged schematic view at a in fig. 4.
Reference numerals: 1. a cold header body; 2. a deoiling mechanism; 21. a frame; 211. a pushing cylinder; 212. an oil guide plate; 213. an edge; 214. a baffle plate; 22. a material receiving bin; 221. a feed inlet; 222. a discharge port; 23. a transfer assembly; 231. a driving wheel; 232. a driven wheel; 233. a servo motor; 234. a conveyor belt; 235. a support roller; 24. an oil absorption assembly; 241. an oil suction frame; 242. a lifting cylinder; 243. mounting a plate; 244. a sponge; 245. an oil absorbing wiping cloth; 246. magic tape; 247. a wool block; 248. hooking the block; 25. an oil box; 3. a filter plate; 4. a driving cylinder; 5. a gas spring; 6. a vibrator; 7. a stirring assembly; 71. a stirring motor; 72. a stirring shaft; 73. a stirring paddle; 8. a material pushing assembly; 81. a material pushing cylinder; 82. pushing the plate; 9. a leveling assembly; 91. flattening the air cylinder; 92. and (7) flattening the plate.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The embodiment discloses a nut processing technology, as shown in fig. 1, including the following steps:
s1, acid washing: soaking the wire material in 10-12% hydrochloric acid solution for 10-15min, cleaning with clear water, and oven drying;
s2, drawing: drawing the wire rod after acid washing by a wire drawing machine to form a linear blank with a preset diameter, and winding the linear blank into a coil;
s3, spheroidizing annealing: heating the blank to 730-740 ℃, preserving heat for 3-4 hours, then slowly cooling to 650-700 ℃ at the speed of less than 20 ℃/h, keeping for 4-5 hours, and naturally cooling to normal temperature after discharging;
s4, cold heading forming: placing the blank subjected to spheroidizing annealing into a cold header body 1 (shown in figure 2) for cold heading to obtain a nut body with full and consistent corners and a through hole punched in the center;
s5, deoiling treatment: placing the cold-headed and formed nut body into a deoiling mechanism 2 (shown in figure 2) for deoiling so as to remove oil on the surface of the nut body;
s6, tapping: putting the deoiled nut body into a tapping machine for tapping so as to machine internal threads on the inner wall of the through hole;
s7, cleaning: putting the tapped nut body into a centrifugal device for cleaning to remove oil stains and impurities on the surface of the nut body;
s8, checking: checking whether the external dimension of the nut body reaches the standard through a vernier caliper, and checking whether the internal thread of the nut body has defects through naked eyes and a bolt;
s9, surface treatment: and immersing the qualified nut body after inspection into an aqueous solution containing a precipitated metal compound, wherein metal substances precipitated from the aqueous solution after electrification are attached to the surface of the nut body to form an antirust layer.
Wherein the wire drawing machine is an inverted wire drawing machine purchased from mechanical equipment Limited, Fahrenheit, Zhejiang; the cold header body 1 is a TB-NF-11B type high-speed cold header purchased from Wenzhou Tubang mechanical equipment Limited; the tapping machine is a multi-shaft tapping machine purchased from three-friend hardware machinery factories in Dongguan.
As shown in fig. 2 and 3, the deoiling mechanism 2 includes a frame 21, and a material receiving bin 22, a conveying assembly 23 and an oil suction assembly 24 mounted on the frame 21, wherein the conveying assembly 23 is located at a lower side of the material receiving bin 22, and the oil suction assembly 24 is located directly above the conveying assembly 23. The receiving bin 22 comprises a feed port 221 and a discharge port 222 which are respectively arranged at two ends of the receiving bin, the feed port 221 is communicated with an outlet of the cold header body 1, and the discharge port 222 is positioned right above one end of the conveying assembly 23.
As shown in figures 2 and 3, the left inner wall and the right inner wall of the receiving bin 22 are respectively hinged with a filter plate 3, the front side wall and the rear side wall of the two filter plates 3 are respectively abutted with the front side wall and the rear side wall of the receiving bin 22, the sum of the lengths of the two filter plates 3 is larger than the distance between the left inner wall and the right inner wall of the receiving bin 22, and the filter plates 3 are provided with a plurality of through holes with cross sectional areas smaller. Install drive assembly on receiving feed bin 22, drive assembly drives actuating cylinder 4 including installing on receiving feed bin 22 left and right sides lateral wall, and two drive actuating cylinder 4 are located two filter 3 one sides of keeping away from each other respectively, and two piston rods that drive actuating cylinder 4 pass receive feed bin 22 after respectively with two filter 3 free end articulated. When the piston rods of the two driving cylinders 4 extend to the longest, the two filter plates 3 rotate in opposite directions and close the discharge port 222, the nut body output from the cold heading machine body 1 falls onto the two filter plates 3, and the nut body is placed for a period of time, so that oil on the surface of the nut body can drip under the action of gravity to be collected.
As shown in FIG. 3, the left and right inner walls of the material receiving bin 22 are respectively hinged with two gas springs 5, the two gas springs 5 are respectively close to the front and rear ends of the filter plate 3, and the piston rods are hinged with the adjacent filter plates 3. The gas spring 5 plays a role of supporting the filter plate 3 in an auxiliary way, and the bearing burden of the driving cylinder 4 is reduced.
As shown in fig. 2 and 3, the vibrating machine 6 is mounted on the side wall of the receiving bin 22, and when the vibrating machine 6 works, the nut body in the receiving bin 22 can vibrate therewith, so that the dropping speed of the oil on the surface of the nut body is increased.
As shown in fig. 2 and 3, the collecting bin 22 is provided with the stirring assembly 7, the stirring assembly 7 includes a stirring motor 71, a stirring shaft 72 fixedly connected to an output shaft of the stirring motor 71, and a plurality of stirring paddles 73 fixed to a bottom end of the stirring shaft 72, the stirring paddles 73 are circumferentially distributed with the stirring shaft 72, the stirring motor 71 is installed on an upper side wall of the collecting bin 22, the output shaft penetrates through the collecting bin 22, and the stirring shaft 72 and the stirring paddles 73 are both disposed in the collecting bin 22 and above the filter plate 3. After the nut body is placed on the filter plate 3 for a period of time, the stirring shaft 72 is driven to rotate by the stirring motor 71, and then the stirring paddle 73 is driven to stir the nut body, so that the recovery rate of oil is improved.
As shown in fig. 2 and 4, a pushing cylinder 211 located on one side of the pushing cylinder 211 far from the conveying assembly 23 is installed on the frame 21, a piston rod of the pushing cylinder 211 horizontally faces the material receiving bin 22 and is fixed with an oil guide plate 212, one end of the oil guide plate 212, which is in an arc shape and far from the material outlet 222, is a lower end, and the lower end of the oil guide plate 212 extends into the oil box 25 for collecting oil. Two opposite side wall edges of the oil guide plate 212 are integrally formed with a rim 213, and the rim 213 is formed by extending the guide plate to a side close to the material receiving bin 22. The oil on the surface of the nut body on the filter plate 3 drops onto the oil guide plate 212 and flows into the oil box 25 through the oil guide plate 212 to be collected, and when the oil does not drop, the pushing cylinder 211 drives the oil guide plate 212 to push towards the side far away from the discharge port 222, so that the nut body drops onto the conveying assembly 23.
As shown in fig. 2 and 4, the conveying assembly 23 includes a driving wheel 231 and a driven wheel 232 rotatably connected to the frame 21, a servo motor 233 having an output shaft fixedly connected to the driving wheel 231, and a conveying belt 234 having two ends respectively sleeved on the outer sides of the driving wheel 231 and the driven wheel 232, the conveying belt 234 is a magnetic soft belt, one end of the conveying belt 234 close to the material receiving bin 22 is located right below the material outlet 222, and a plurality of supporting rollers 235 rotatably connected to the frame 21 are further disposed between the driving wheel 231 and the driven wheel 232. The nut body is moved out from the discharge port 222 and falls on the conveyor belt 234, and the servo motor 233 can drive the driving wheel 231 to rotate, so that the conveyor belt 234 conveys the nut body to the side away from the receiving bin 22. The conveying belt 234 is a magnetic soft belt and can attract the nut body, so that the stability of the nut body during transmission is improved.
As shown in fig. 2, three groups of pushing assemblies 8 distributed along the length direction of the conveyor belt 234 are mounted on the rack 21, each pushing assembly 8 includes a pushing cylinder 81 mounted on the rack 21 and a pushing plate 82 fixedly connected to a piston rod of the pushing cylinder 81, the piston rod of the pushing cylinder 81 extends to a side close to the conveyor belt 234, and the pushing plate 82 can move along the width direction of the conveyor belt 234 under the action of the pushing cylinder 81. The distance between the lower end surface of the pushing plate 82 and the conveying belt 234 is larger than the thickness of a single nut body and smaller than the sum of the thicknesses of two nut bodies when the nut bodies are stacked. After the nut body falls to the conveyer belt 234, utilize each push pedal 82 to promote the nut body on upper strata in proper order for the nut body can not coincide in one, makes things convenient for oil absorption subassembly 24 to absorb the fluid on nut body surface.
As shown in fig. 2 and 4, a baffle 214 fixed on the frame 21 is disposed on a side of the conveyor belt 234 away from the pushing cylinder 211, and the baffle 214 plays a role in limiting when the pushing assembly 8 works, so as to prevent the nut body from being pushed away from the frame 21 by the pushing plate 82.
As shown in fig. 2 and 4, three sets of spreading assemblies 9 distributed along the length direction of the conveyor belt 234 are mounted on the frame 21, each spreading assembly 9 includes a spreading cylinder 91 mounted on the frame 21 and a spreading plate 92 fixedly connected to a piston rod of the spreading cylinder 91, the spreading cylinder 91 is mounted on the frame 21 and located on one side of the conveyor belt 234 away from the material pushing cylinder 81, and a lower end surface of the spreading plate 92 is flush with the push plate 82. The spreader plate 92 is not parallel to the pusher plate 82 and the direction of movement of the spreader plate 92 by the spreader cylinder 91 forms an acute or obtuse angle with the direction of travel of the conveyor belt 234. The nut body of whereabouts is many times, only through pushing away material subassembly 8 and be not enough to make the nut body flattening stand out, and partial nut body probably lies in the similar department of baffle 214 and piles up, and the usable cylinder 91 that stands out of people drives the board 92 that stands out of flatting and further pushes away the material, is favorable to the tiling of nut body to stand out.
As shown in fig. 4 and 5, the oil suction assembly 24 includes an oil suction frame 241 fixed on the frame 21, a lifting cylinder 242 mounted on the oil suction frame 241, a mounting plate 243 fixedly connected to a piston rod of the lifting cylinder 242, and a sponge 244 connected to the mounting plate 243, wherein the piston rod of the lifting cylinder 242 passes through the oil suction frame 241 and is disposed downward, the sponge 244 is located on one side of the mounting plate 243 close to the conveyor belt 234, and an end face of the sponge 244 close to the conveyor belt 234 is fixed with an oil suction wiping cloth 245. When the nut body is transmitted to the position under the oil absorption frame 241, the lifting cylinder 242 is used for driving the mounting plate 243 to move downwards, so that the sponge 244 and the oil absorption wiping cloth 245 absorb residual oil on the surface of the nut body, the oil absorption effect is good, and the cleanliness of the nut body is high.
As shown in fig. 4 and 5, the mounting plate 243 and the sponge 244 are adhered by the hook and loop fastener 246, the hook and loop fastener 246 includes a nub 247 fixed on the lower end surface of the mounting plate 243 and a hook block 248 fixed on the upper end surface of the sponge 244, and the nub 247 and the hook block 248 are adhered and matched. When the oil stain on the oil absorption wiping cloth 245 is too heavy, people can separate the mounting plate 243 and the sponge 244 by separating the fur block 247 and the hook block 248, so that the sponge 244 and the oil absorption wiping cloth 245 can be replaced with new ones, and the oil absorption wiping cloth is convenient to assemble and disassemble.
The working principle of the embodiment is as follows: firstly, pickling a wire raw material to remove an oxide film on the surface of the wire raw material, drawing the wire raw material into a wire blank with a preset diameter through a wire drawing machine, and then carrying out spheroidizing annealing treatment to improve the toughness of the blank; and after the blank is cooled to normal temperature, the blank is formed into a nut body with a through hole reserved in the middle by using the cold header body 1, and the nut body is transmitted to the deoiling mechanism 2 for deoiling after cold heading. And processing an internal thread in the through hole of the nut body by using a tapping machine, cleaning residual waste, oil stain and impurities on the surface of the nut body after tapping in a centrifugal device, checking whether the appearance of the nut body reaches the standard or not and whether the internal thread has defects or not, performing surface treatment on the qualified nut body after detection, forming an anti-rust layer on the surface of the nut body, and re-processing the unqualified nut body after collection.
When deoiling, firstly, the pushing cylinder 211 is used for moving the oil guide plate 212 to the position under the discharge port 222, then the piston rod of the driving cylinder 4 is extended to enable the two filter plates 3 to seal the discharge port 222, the nut body output from the cold header body 1 falls onto the filter plates 3, the vibrating machine 6 is started, oil on the surface of the nut body drips onto the oil guide plate 212 from the through holes of the filter plates 3, then flows to the oil box 25 along the oil guide plate 212 to be collected, and then the stirring motor 71 is used for driving the stirring paddle 73 to stir the nut body. When the nut body does not drip oil, the pushing cylinder 211 is used to move the oil guide plate 212 to one side far away from the discharge port 222, then the two filter plates 3 rotate back to open the discharge port 222, after the nut body falls to the moving conveyor belt 234, the pushing assembly 8 and the spreading assembly 9 push the nut body away and spread flat, and finally the lifting cylinder 242 is used to drive the mounting plate 243 to move downwards, so that the sponge 244 and the oil absorption wiping cloth 245 sequentially move to the surface of the nut body right below the nut body to absorb oil.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the design concept of the present invention should be included in the scope of the present invention.
Claims (10)
1. The nut machining process is characterized by comprising the following steps of:
s1, acid washing: soaking the wire material in 10-12% hydrochloric acid solution for 10-15min, cleaning with clear water, and oven drying;
s2, drawing: drawing the wire rod after acid washing by a wire drawing machine to form a linear blank with a preset diameter, and winding the linear blank into a coil;
s3, spheroidizing annealing: heating the blank to 730-740 ℃, preserving heat for 3-4 hours, then slowly cooling to 650-700 ℃ at the speed of less than 20 ℃/h, keeping for 4-5 hours, and naturally cooling to normal temperature after discharging;
s4, cold heading forming: placing the blank subjected to spheroidizing annealing into a cold header body (1) for cold heading to obtain a nut body with full and consistent corners and a through hole punched in the center;
s5, deoiling treatment: the nut body after cold heading forming is placed into a deoiling mechanism (2) for deoiling, the deoiling mechanism (2) comprises a rack (21), and a receiving bin (22), a conveying assembly (23) and an oil absorption assembly (24) which are installed on the rack (21), the receiving bin (22) comprises a discharge port (222) and a feed port (221) communicated with an outlet of a cold heading machine, two opposite side walls of the receiving bin (22) are respectively hinged with a filter plate (3), the receiving bin (22) is provided with a driving assembly for driving the two filter plates (3) to open or close the discharge port (222), an oil guide plate (212) is arranged below the discharge port (222), and the rack (21) is provided with a pushing cylinder (211) for driving the oil guide plate (212) to move close to or far away from the discharge port (222); one end of the conveying assembly (23) is positioned right below the discharge hole (222), and the oil suction assembly (24) is positioned on the upper side of the conveying assembly (23);
s6, tapping: putting the deoiled nut body into a tapping machine for tapping so as to machine internal threads on the inner wall of the through hole;
s7, cleaning: putting the tapped nut body into a centrifugal device for cleaning to remove oil stains and impurities on the surface of the nut body;
s8, checking: checking whether the external dimension of the nut body reaches the standard through a vernier caliper, and checking whether the internal thread of the nut body has defects through naked eyes and a bolt;
s9, surface treatment: and immersing the qualified nut body after inspection into an aqueous solution containing a precipitated metal compound, wherein metal substances precipitated from the aqueous solution after electrification are attached to the surface of the nut body to form an antirust layer.
2. The processing technology of the nut as claimed in claim 1, wherein: the driving assembly comprises driving cylinders (4) which are arranged on two opposite side walls of the material collecting bin (22), and piston rods of the two driving cylinders (4) are hinged with the free ends of the two filter plates (3) after penetrating through the material collecting bin (22) respectively.
3. The process for machining a nut according to claim 2, wherein: at least two gas springs (5) are hinged to two opposite inner walls of the material receiving bin (22) respectively, and piston rods of the gas springs (5) are hinged to the filter plates (3) close to the gas springs; when the piston rod of each air spring (5) extends simultaneously, the discharge hole (222) is sealed by the two filter plates (3).
4. The processing technology of the nut as claimed in claim 1, wherein: and the material collecting bin (22) is provided with a vibrating machine (6).
5. The processing technology of the nut as claimed in claim 1, wherein: receive feed bin (22) and be connected with stirring subassembly (7) that are located discharge gate (222) directly over, stirring subassembly (7) are including installing agitator motor (71) of receiving feed bin (22) outer wall, with agitator motor (71) output shaft fixed connection's (mixing) shaft (72) and circumference setting at a plurality of stirring rake (73) of (mixing) shaft (72) bottom, stirring rake (73) stretch into receive in feed bin (22) and are arranged in the top of filter (3).
6. The processing technology of the nut as claimed in claim 1, wherein: the oil guide plate (212) is arc-shaped, the lower end of the oil guide plate extends into the oil box (25), the edges of two opposite side walls of the oil guide plate (212) are integrally formed with a rim (213), and the rim (213) extends from the oil guide plate (212) to one side close to the material collecting bin (22).
7. The processing technology of the nut as claimed in claim 1, wherein: the conveying assembly (23) comprises a driving wheel (231) and a driven wheel (232) which are rotatably connected to the rack (21), a servo motor (233) with an output shaft fixedly connected with the driving wheel (231) and a conveying belt (234) with two ends respectively sleeved on the outer sides of the driving wheel (231) and the driven wheel (232), wherein the conveying belt (234) is a magnetic soft belt, and one end of the conveying belt is located right below the discharge hole (222).
8. The process for machining a nut according to claim 7, wherein: the rack (21) is provided with a plurality of pushing assemblies (8) distributed along the length direction of the conveyor belt (234), each pushing assembly (8) comprises a pushing cylinder (81) and a pushing plate (82) fixedly connected with a piston rod of the pushing cylinder (81), and the distance between each pushing plate (82) and the conveyor belt (234) is larger than the thickness of a single nut body and smaller than the sum of the thicknesses of two nut bodies when the nut bodies are stacked; the push plate (82) moves along the width direction of the conveyor belt (234) under the action of the material pushing cylinder (81), and a baffle (214) fixed on the rack (21) is arranged on one side, away from the material pushing cylinder (81), of the conveyor belt (234).
9. The process for machining a nut according to claim 8, wherein: one side that material cylinder (81) was pushed away in conveyer belt (234) is kept away from still is equipped with multiunit and evenly spreads subassembly (9) along the length direction distribution of conveyer belt (234), evenly spread subassembly (9) including install on frame (21) evenly spread cylinder (91) and with evenly spread piston rod fixed connection's of cylinder (91) even share board (92), the direction of motion of even share board (92) forms acute angle or obtuse angle with the transmission direction of conveyer belt (234).
10. The process for machining a nut according to claim 7, wherein: the oil absorption assembly (24) comprises an oil absorption frame (241) fixed on the rack (21), a lifting cylinder (242) installed on the oil absorption frame (241), a mounting plate (243) fixedly connected with a piston rod of the lifting cylinder (242) and a sponge (244) adhered to one side, close to the conveying belt (234), of the mounting plate (243) through a magic tape (246), the piston rod of the lifting cylinder (242) penetrates through the oil absorption frame (241) to be arranged downwards, and oil absorption wiping cloth (245) is fixed on the end face, close to the conveying belt (234), of the sponge (244).
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| CN201911338021.3A CN110961871B (en) | 2019-12-23 | 2019-12-23 | Nut machining process |
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| CN201911338021.3A CN110961871B (en) | 2019-12-23 | 2019-12-23 | Nut machining process |
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Cited By (5)
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| CN111790664A (en) * | 2020-06-23 | 2020-10-20 | 宇星紧固件(嘉兴)股份有限公司 | Integrative device of tooth is attacked in nut cold-heading |
| CN113275842A (en) * | 2021-05-27 | 2021-08-20 | 浙江方泉汽车标准件股份有限公司 | Production process of high-strength rivet nut |
| CN113732625A (en) * | 2021-08-13 | 2021-12-03 | 山东九佳紧固件股份有限公司 | Processing technology of dustproof and antirust hub nut |
| CN114042856A (en) * | 2021-10-12 | 2022-02-15 | 高嘉智能设备(嘉兴)股份有限公司 | Fastener production is with online deoiling machine |
| CN115591617A (en) * | 2022-12-12 | 2023-01-13 | 河北新烨工程技术有限公司（Cn） | Environment-friendly oily steel scrap processing, cutting and crushing system |
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| CN114042856A (en) * | 2021-10-12 | 2022-02-15 | 高嘉智能设备(嘉兴)股份有限公司 | Fastener production is with online deoiling machine |
| CN115591617A (en) * | 2022-12-12 | 2023-01-13 | 河北新烨工程技术有限公司（Cn） | Environment-friendly oily steel scrap processing, cutting and crushing system |
| CN115591617B (en) * | 2022-12-12 | 2023-04-07 | 河北新烨工程技术有限公司 | Environment-friendly oily steel scrap processing, cutting and crushing system |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
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Denomination of invention: Processing technology of a nut Effective date of registration: 20221201 Granted publication date: 20210504 Pledgee: Wenzhou Dongtou Branch of Agricultural Bank of China Ltd. Pledgor: Wenzhou Ruitai Fastener Co.,Ltd. Registration number: Y2022330003354 |
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Date of cancellation: 20231023 Granted publication date: 20210504 Pledgee: Wenzhou Dongtou Branch of Agricultural Bank of China Ltd. Pledgor: Wenzhou Ruitai Fastener Co.,Ltd. Registration number: Y2022330003354 |
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Denomination of invention: A Processing Technology for Nuts Effective date of registration: 20231026 Granted publication date: 20210504 Pledgee: Wenzhou Dongtou Branch of Agricultural Bank of China Ltd. Pledgor: Wenzhou Ruitai Fastener Co.,Ltd. Registration number: Y2023330002485 |