CN109780030B - Conical pan head welding bolt and processing technology thereof - Google Patents
Conical pan head welding bolt and processing technology thereof Download PDFInfo
- Publication number
- CN109780030B CN109780030B CN201910172726.6A CN201910172726A CN109780030B CN 109780030 B CN109780030 B CN 109780030B CN 201910172726 A CN201910172726 A CN 201910172726A CN 109780030 B CN109780030 B CN 109780030B
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- bolt
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- disc surface
- lock part
- drilling
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- 238000003466 welding Methods 0.000 title claims abstract description 28
- 238000005516 engineering process Methods 0.000 title claims abstract description 9
- 238000012545 processing Methods 0.000 title claims abstract description 9
- 238000005553 drilling Methods 0.000 claims abstract description 20
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000003112 inhibitor Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 239000013556 antirust agent Substances 0.000 claims description 16
- 238000005260 corrosion Methods 0.000 claims description 13
- 230000007797 corrosion Effects 0.000 claims description 13
- 238000004140 cleaning Methods 0.000 claims description 12
- 238000002791 soaking Methods 0.000 claims description 12
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 9
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 238000003860 storage Methods 0.000 claims description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000012752 auxiliary agent Substances 0.000 claims description 6
- 238000004090 dissolution Methods 0.000 claims description 6
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims description 6
- 239000001488 sodium phosphate Substances 0.000 claims description 6
- 229910000162 sodium phosphate Inorganic materials 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 229910019142 PO4 Inorganic materials 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- 238000007605 air drying Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 4
- 239000010452 phosphate Substances 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 4
- 238000005491 wire drawing Methods 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- 239000012153 distilled water Substances 0.000 claims description 3
- 239000000839 emulsion Substances 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 239000004094 surface-active agent Substances 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000000861 blow drying Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
The invention discloses a conical disc head welding bolt and a processing technology thereof, the conical disc head welding bolt comprises a rod body, one end of the rod body is provided with a plane disc surface, one end of the plane disc surface, which is far away from the rod body, is provided with a trapezoid disc surface, one end of the trapezoid disc surface, which is far away from the plane disc surface, is provided with a conical disc surface, threads and circular teeth which are in a circular spiral shape are sequentially arranged on the rod body from left to right, the other end of the rod body is provided with a second drilling and locking part, one end of the second drilling and locking part, which is far away from the rod body, is provided with a first drilling and locking part, a concave area is arranged at the center of one end of the first drilling and locking part, which is far away from the second drilling and locking part, the conical disc head welding bolt bears larger tightening torque, has high connection strength, is beneficial for connection among parts, compact structure, prevents the bolt from being broken, and prolongs the service life of the bolt; through the use of rust-resistant device and rust inhibitor, be convenient for soak rust-resistant with the bolt, facilitate the use.
Description
Technical Field
The invention relates to the technical field of bolts, in particular to a conical pan head welding bolt and a processing technology thereof.
Background
In recent years, with the progress of society, the automobile industry has been actively developed and has been moving to thousands of households, and a welding bolt has been often used for a body member of an automobile. The welding bolt is welded with the plate in the following manner: firstly, inserting a bolt into an insertion hole, enabling a guide part to be embedded with the insertion hole, and inserting the bolt into the insertion hole so that a welding protrusion abuts against the surface of the plate material; then clamping the bolt and the plate material inserted into the insertion hole in a manner of pressurizing by the upper electrode and the lower electrode; then, welding current is applied to the upper and lower electrodes in a state of being sandwiched between the upper and lower electrodes, and the bolt is pressed against the plate material while the welding protrusion is melted.
The welding process is a common manufacturing process for automobile body frames, wherein bolt welding is a common mode on automobile body frame parts.
However, the radial shearing force which can be born by the existing bolt after the object is fastened is small, and the existing bolt is easy to break, so that the service life of the bolt is reduced, and the installation is inconvenient, so that the conical pan head welding bolt and the machining process thereof are designed.
Disclosure of Invention
In order to overcome the technical problems, the invention aims to provide the conical pan head welding bolt and the processing technology thereof, wherein the conical pan head welding bolt bears larger tightening torque, has high connection strength and larger tightening force, is beneficial to the connection between parts, has compact structure, prevents the bolt from breaking and prolongs the service life of the bolt; through the use of rust-resistant device and rust inhibitor, be convenient for soak rust-resistant with the bolt, facilitate the use.
The aim of the invention can be achieved by the following technical scheme:
the utility model provides a toper coiled hair welding bolt, includes the body of rod, the one end of the body of rod is provided with the plane disc face, the one end that the body of rod was kept away from to the plane disc face is provided with trapezoidal disc face, the one end that the plane disc face was kept away from to trapezoidal disc face is provided with the toper disc face, from left to right is equipped with screw thread and the circular tooth with circular heliciform on the body of rod in proper order, the other end of the body of rod is provided with the second and bores the lock portion, the one end that the body of rod was kept away from to the second bores the lock portion is provided with first brill lock portion, first brill lock portion is kept away from one end center department that the second bored the lock portion is provided with the sunk area.
A processing technology of a conical pan head welding bolt comprises the following steps:
step one, wire drawing: drawing and molding the raw materials by using drawing equipment and a die to reach the required shape and size;
step two, cold heading: carrying out cold heading forming on the wire-drawn and formed material by using cold heading equipment, and forming a rod body, a plane disc surface, a trapezoid disc surface, a cone disc surface, a first drill lock part, a second drill lock part and a first drill lock part of the bolt by using die forming; and cutting a recessed area at the center of the first drill lock portion by the cutting machine;
step three, tooth twisting: a thread rolling device is adopted to roll out threads and round threads on a rod body of the bolt;
fourthly, carrying out heat treatment on the whole bolt;
step five, acid cleaning: soaking the tempered bolt in 5-7% hydrochloric acid for 10-15min, cleaning with clear water, soaking in 1-2% phosphate solution for 5-8min, and cleaning with clear water;
step six, finishing: the antirust agent is added into the antirust device to soak the bolt, so that an antirust layer is formed on the surface of the bolt, the thickness of the antirust layer is 10+/-5 mu m, and the finished product can be obtained after air drying.
As a further scheme of the invention: the first drill lock part is in a round table shape, the second drill lock part is in a cylindrical shape, the diameter of the second drill lock part is 4.59-4.8mm, and the first drill lock part and the second drill lock part are arranged at an angle of 40-50 degrees.
As a further scheme of the invention: the conical disc surface and the trapezoidal disc surface are arranged at an angle of 3.5-4.5 degrees.
As a further scheme of the invention: the diameter of the trapezoid disc surface is larger than that of the rod body.
As a further scheme of the invention: the length of the round teeth is 2.3mm.
As a further scheme of the invention: the rust inhibitor in the step six is prepared by the following steps: adding 0.5g of corrosion inhibitor sodium phosphate and 0.5g of urotropine into 14.0g of distilled water, stirring at normal temperature until the corrosion inhibitor sodium phosphate and the urotropine are dissolved, adding 1.0gOP-10 of surfactant, 3.0g of auxiliary agent glycerol and 3.0g of auxiliary agent propylene glycol, adding 13.0g of silicon dioxide after the dissolution, adding 65.0g of film forming agent acrylic emulsion after the dissolution is completed, and stirring for 20min to obtain the antirust agent.
As a further scheme of the invention: the rust prevention device in the step six comprises a base, a box body and a rotating motor, wherein the box body is arranged at the top of the base, the box body is of a hollow structure, two air cylinders are symmetrically arranged in the box body, air cylinder piston rods are fixedly connected to the top of the air cylinders and are connected with a trough through connecting blocks, a filter screen is arranged in the trough, a discharging pipe is arranged at one end of the bottom of the trough, a valve is arranged on the discharging pipe, the rotating motor is arranged at the center of the top of the box body, a rotating shaft is fixedly connected to the bottom of the rotating motor, the rotating shaft stretches into the box body and is connected with the center of the connecting rod, and two ends of the connecting rod are fixedly connected with a stranding cage.
As a further scheme of the invention: the storage box is installed to the top one end of base, one side fixedly connected with water pump of storage box, the one end and the inlet pipe of water pump are connected, the one end that the water pump was kept away from to the inlet pipe is located the silo top.
As a further scheme of the invention: the stranding cage can be placed in the trough and is not contacted with the filter screen.
The invention has the beneficial effects that:
1. the conical pan head welding bolt bears larger tightening torque, has high connection strength and larger fastening force, is beneficial to the connection between parts, is convenient to be equipped, has compact structure, prevents the bolt from breaking and prolongs the service life of the bolt;
2. the feeding pipe is used for feeding the trough, the feeding is simple and convenient, the two cylinders are driven to work, the piston rods of the two cylinders are driven to stretch out and draw back by the two cylinders, the trough is pushed to ascend and descend, the height of the trough is convenient to adjust, and the bolt is convenient to soak and take out; the rotating motor drives the connecting rod to rotate through the rotating shaft, the connecting rod drives the stranding cage to rotate, the time for soaking the bolt is shortened, and the working efficiency is improved; the anti-rust treatment is convenient to conduct on the bolt, the operation is simple, the use is convenient, the service life of the bolt is prolonged, the filter screen is arranged in the trough, dust is contained on the surface of the bolt, the dust can enter the anti-rust agent in the soaking process, the anti-rust agent is filtered through the filter screen and is discharged through the discharge pipe, the anti-rust agent is convenient to recycle, and resources are saved;
3. the rust inhibitor prepared by the invention can improve the corrosion resistance potential of the bolt, reduce the corrosion current and the corrosion speed of the bolt, has good corrosion resistance and is an environment-friendly rust inhibitor.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic view of the overall structure of a conical pan head welding bolt of the present invention;
FIG. 2 is a schematic view of the structure of a conical pan head welding bolt body of the invention;
FIG. 3 is a schematic side view of a conical pan head welding bolt of the present invention;
FIG. 4 is a schematic view of the overall structure of the rust preventive device of the invention.
In the figure: 1. a rod body; 2. a trapezoidal disc surface; 3. a planar disk surface; 4. screw threads; 5. a second drill lock portion; 6. a first drill lock portion; 7. a recessed region; 8. conical disc surface; 9. a base; 10. a discharge pipe; 11. a cylinder; 12. a case; 13. a feed pipe; 14. a water pump; 15. a storage box; 16. a trough; 17. a cylinder piston rod; 18. a connecting block; 19. a rotating shaft; 20. a rotating electric machine; 21. a connecting rod; 22. a stranding cage; 23. a filter screen; 41. round teeth.
Description of the embodiments
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
Referring to fig. 1-4, a conical disc head welding bolt comprises a rod body 1, wherein a planar disc surface 3 is arranged at one end of the rod body 1, a trapezoidal disc surface 2 is arranged at one end of the planar disc surface 3 away from the rod body 1, a conical disc surface 8 is arranged at one end of the trapezoidal disc surface 2 away from the planar disc surface 3, threads 4 and circular teeth 41 which are in a circular spiral shape are sequentially arranged on the rod body 1 from left to right, a second drilling lock part 5 is arranged at the other end of the rod body 1, a first drilling lock part 6 is arranged at one end of the second drilling lock part 5 away from the rod body 1, and a concave area 7 is arranged at the center of one end of the first drilling lock part 6 away from the second drilling lock part 5; the first drilling lock part 6 is in a round table shape, the second drilling lock part 5 is in a cylindrical shape, the diameter of the second drilling lock part 5 is 4.59-4.8mm, and the first drilling lock part 6 and the second drilling lock part 5 are arranged at an angle of 40-50 degrees; the conical disc surface 8 and the trapezoidal disc surface 2 are arranged at an angle of 3.5-4.5 degrees; the diameter of the trapezoid disc surface 2 is larger than that of the rod body 1, and the length of the circular teeth 41 is 2.3mm.
A processing technology of a conical pan head welding bolt comprises the following steps:
step one, wire drawing: drawing and molding the raw materials by using drawing equipment and a die to reach the required shape and size;
step two, cold heading: carrying out cold heading forming on the wire-drawn and formed material by using cold heading equipment, and forming a rod body, a plane disc surface, a trapezoid disc surface, a cone disc surface, a first drill lock part, a second drill lock part and a first drill lock part of the bolt by using die forming; and cutting a recessed area at the center of the first drill lock portion by the cutting machine;
step three, tooth twisting: a thread rolling device is adopted to roll out threads and round threads on a rod body of the bolt;
fourthly, carrying out heat treatment on the whole bolt;
step five, acid cleaning: soaking the tempered bolt in 5-7% hydrochloric acid for 10-15min, cleaning with clear water, soaking in 1-2% phosphate solution for 5-8min, and cleaning with clear water;
step six, finishing: the antirust agent is added into the antirust device to soak the bolt, so that an antirust layer is formed on the surface of the bolt, the thickness of the antirust layer is 10+/-5 mu m, and the finished product can be obtained after air drying.
In the sixth step, the antirust agent is prepared by the following steps: adding 0.5g of corrosion inhibitor sodium phosphate and 0.5g of urotropine into 14.0g of distilled water, stirring at normal temperature until the corrosion inhibitor sodium phosphate and the urotropine are dissolved, adding 1.0gOP-10 of surfactant, 3.0g of auxiliary agent glycerol and 3.0g of auxiliary agent propylene glycol, adding 13.0g of silicon dioxide after the dissolution, adding 65.0g of film forming agent acrylic emulsion after the dissolution is completed, and stirring for 20min to obtain the antirust agent.
Examples
A processing technology of a conical pan head welding bolt comprises the following steps:
step one, wire drawing: drawing and molding the raw materials by using drawing equipment and a die to reach the required shape and size;
step two, cold heading: carrying out cold heading forming on the wire-drawn and formed material by using cold heading equipment, and forming a rod body, a plane disc surface, a trapezoid disc surface, a cone disc surface, a first drill lock part, a second drill lock part and a first drill lock part of the bolt by using die forming; and cutting a recessed area at the center of the first drill lock portion by the cutting machine;
step three, tooth twisting: a thread rolling device is adopted to roll out threads and round threads on a rod body of the bolt;
fourthly, carrying out heat treatment on the whole bolt;
step five, acid cleaning: soaking the tempered bolt in 5-7% hydrochloric acid for 10-15min, cleaning with clear water, soaking in 1-2% phosphate solution for 5-8min, and cleaning with clear water;
step six, finishing: and a layer of pure aluminum coating is prevented from being sprayed on the bolt by a spraying device, and the spraying thickness of the pure aluminum coating is 10+/-5 mu m.
The rust prevention test was performed on the bolts coated with the rust inhibitor and the bolts coated with the pure aluminum coating layer in examples 1 and 2, the bolts were immersed in water for 1 to 5 seconds, then taken out, the bolts were weighed after the surface moisture was evaporated, then they were immersed in a 5% sodium chloride solution for 96 hours, then weighed again, and the corrosion rate was calculated, and the test results were as shown in table 1:
TABLE 1
Example 1 example 2 corrosion Rate(％) 9.14*10 -6 4.90*10 -5
As can be seen from the table, the rust-preventing effect is better by adding the bolt soaked by the rust-preventing agent into the rust-preventing device, the rust-preventing layer formed on the bolt is more uniform by the rust-preventing device, and the rust-preventing agent prepared by the process has good corrosion resistance.
The conical pan head welding bolt prepared by the process bears larger tightening torque, has high connection strength and larger tightening force, is favorable for connection between parts, has compact structure, prevents the bolt from breaking, and prolongs the service life of the bolt.
Referring to fig. 4, in the sixth step, the rust preventing device includes a base 9, a box 12 and a rotating motor 20, the box 12 is installed at the top of the base 9, the box 12 is of a hollow structure, two cylinders 11 are symmetrically installed inside the box 12, the top of the cylinder 11 is fixedly connected with a cylinder piston rod 17, the two cylinder piston rods 17 are connected with a trough 16 through a connecting block 18, a filter screen 23 is arranged inside the trough 16, a discharge pipe 10 is arranged at one end of the bottom of the trough 16, a valve is arranged on the discharge pipe 10, the rotating motor 20 is installed at the center of the top of the box 12, a rotating shaft 19 is fixedly connected with the bottom of the rotating motor 20, the rotating shaft 19 stretches into the inside of the box 12 and is connected with the center of a connecting rod 21, and two ends of the connecting rod 21 are fixedly connected with a stranding cage 22.
The storage box 15 is installed to the top one end of base 9, and one side fixedly connected with water pump 14 of storage box 15, and the one end and the inlet pipe 13 of water pump 14 are connected, and the one end that water pump 14 was kept away from to inlet pipe 13 is located silo 16 top, works through water pump 14, pumps the antirust agent that stores in the storage box 15 to inlet pipe 13, and rethread inlet pipe 13 carries out the feeding to silo 16.
The wringer cage 22 can be placed in the trough 16 without contacting the filter screen 23, facilitating rotation of the wringer cage 22 and coating of the bolts.
The working principle of the invention is as follows: firstly, a water pump 14 works, an antirust agent stored in a storage box 15 is pumped to a feed pipe 13, then the feed pipe 13 is used for feeding a trough 16, meanwhile, a bolt is placed in a stranding cage 22, two cylinders 11 are driven to work, two cylinder piston rods 17 are driven by the two cylinders 11 to extend, the trough 16 is pushed to ascend until the entire stranding cage 22 is immersed by the antirust agent, then a rotating motor 20 is driven to work, a connecting rod 21 is driven by the rotating motor 20 to rotate through a rotating shaft 19, the stranding cage 22 is driven by the connecting rod 21 to rotate, the bolt immersing time is shortened, the working efficiency is improved, after a certain time, the rotation is stopped, the cylinder 11 drives the cylinder piston rods 17 to shrink, so that the trough 16 is driven to descend, and the bolt is taken out after air drying or blow drying;
the filter screen 23 is arranged in the trough 16, and dust is contained on the surface of the bolts, so that the dust can enter the antirust agent in the soaking process, the antirust agent is filtered through the filter screen 23 and discharged through the discharge pipe 10, and the antirust agent can be recycled conveniently.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean 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 present 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.
The foregoing is merely illustrative and explanatory of the invention, as various modifications and additions may be made to the particular embodiments described, or in a similar manner, by those skilled in the art, without departing from the scope of the invention or exceeding the scope of the invention as defined in the claims.
Claims (1)
1. The utility model provides a toper coiled hair welding bolt, includes body of rod (1), its characterized in that, the one end of body of rod (1) is provided with plane disc face (3), the one end that body of rod (1) was kept away from to plane disc face (3) is provided with trapezoidal disc face (2), the one end that plane disc face (3) was kept away from to trapezoidal disc face (2) is provided with toper disc face (8), be equipped with in proper order from left to right on body of rod (1) with circular heliciform thread (4) and circular tooth (41), the other end of body of rod (1) is provided with second and bores lock portion (5), the one end that body of rod (1) was kept away from to second bores lock portion (5) is provided with first and bores lock portion (6), first one end center department that second bores lock portion (5) was kept away from to first bores lock portion (6) is provided with sunk area (7);
the first drilling lock part (6) is in a round table shape, the second drilling lock part (5) is in a cylindrical shape, the diameter of the second drilling lock part (5) is 4.59-4.8mm, and the first drilling lock part (6) and the second drilling lock part (5) are arranged at an angle of 40-50 degrees;
the conical disc surface (8) and the trapezoid disc surface (2) are arranged at an angle of 3.5-4.5 degrees;
the diameter of the trapezoid disc surface (2) is larger than that of the rod body (1);
the length of the round tooth (41) is 2.3mm;
the processing technology of the conical pan head welding bolt comprises the following steps:
step one, wire drawing: drawing and molding the raw materials by using drawing equipment and a die;
step two, cold heading: carrying out cold heading forming on the wire-drawn and formed material by using cold heading equipment, and forming a rod body, a plane disc surface, a trapezoid disc surface, a cone disc surface, a first drill lock part, a second drill lock part and a first drill lock part of the bolt by using die forming; and cutting a recessed area at the center of the first drill lock portion by the cutting machine;
step three, tooth twisting: a thread rolling device is adopted to roll out threads and round threads on a rod body of the bolt;
fourthly, carrying out heat treatment on the whole bolt;
step five, acid cleaning: soaking the tempered bolt in 5-7% hydrochloric acid for 10-15min, cleaning with clear water, soaking in 1-2% phosphate solution for 5-8min, and cleaning with clear water;
step six, finishing: soaking the bolt by adding an antirust agent into the antirust device to form an antirust layer on the surface of the bolt, wherein the thickness of the antirust layer is 10+/-5 mu m, and air-drying to obtain a finished product;
the rust inhibitor in the step six is prepared by the following steps: adding 0.5g of corrosion inhibitor sodium phosphate and 0.5g of urotropine into 14.0g of distilled water, stirring at normal temperature until the corrosion inhibitor sodium phosphate and the urotropine are dissolved, adding 1.0gOP-10 surfactant, 3.0g of auxiliary agent glycerol and 3.0g of auxiliary agent propylene glycol, adding 13.0g of silicon dioxide after the dissolution, adding 65.0g of film forming agent acrylic emulsion after the dissolution is completed, and stirring for 20min to obtain the antirust agent;
in the sixth step, the rust prevention device comprises a base (9), a box body (12) and a rotating motor (20), wherein the box body (12) is arranged at the top of the base (9), the box body (12) is of a hollow structure, two air cylinders (11) are symmetrically arranged in the box body (12), air cylinder piston rods (17) are fixedly connected to the tops of the air cylinders (11), the two air cylinder piston rods (17) are connected with a trough (16) through connecting blocks (18), a filter screen (23) is arranged in the trough (16), a discharge pipe (10) is arranged at one end of the bottom of the trough (16), a valve is arranged on the discharge pipe (10), the rotating motor (20) is arranged at the center of the top of the box body (12), a rotating shaft (19) is fixedly connected to the bottom of the rotating motor (20), and the rotating shaft (19) extends into the box body (12) to be connected with the center of a connecting rod (21), and two ends of the connecting rod (21) are fixedly connected with a twisting cage (22);
a storage box (15) is arranged at one end of the top of the base (9), a water pump (14) is fixedly connected to one side of the storage box (15), one end of the water pump (14) is connected with a feed pipe (13), and one end of the feed pipe (13) away from the water pump (14) is positioned above a trough (16);
the stranding cage (22) can be placed in the trough (16) and is not in contact with the filter screen (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910172726.6A CN109780030B (en) | 2019-03-07 | 2019-03-07 | Conical pan head welding bolt and processing technology thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910172726.6A CN109780030B (en) | 2019-03-07 | 2019-03-07 | Conical pan head welding bolt and processing technology thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109780030A CN109780030A (en) | 2019-05-21 |
| CN109780030B true CN109780030B (en) | 2023-10-20 |
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| EP3760335B1 (en) * | 2014-07-07 | 2024-05-22 | Physical Systems, Inc. | Hollow nut |
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