CN112792513A - Production process and device for double-chamfer straight-tooth press-fitting bolt - Google Patents
Production process and device for double-chamfer straight-tooth press-fitting bolt Download PDFInfo
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- CN112792513A CN112792513A CN202110066381.3A CN202110066381A CN112792513A CN 112792513 A CN112792513 A CN 112792513A CN 202110066381 A CN202110066381 A CN 202110066381A CN 112792513 A CN112792513 A CN 112792513A
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- straight
- chamfer
- tooth
- production process
- double
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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
Abstract
The invention belongs to the technical field of fastener production, and particularly relates to a production process and a device for a double-chamfer straight-tooth press-fitting bolt. The process comprises selecting raw materials for processing the bolt; processing the rod diameter of the thread rolling part; preforming the rod diameters of the head part and the straight tooth twisting part; a. b, forming a head, forming a straight tooth rubbing part rod diameter and forming double chamfers, and c, forming a tail chamfer; straight teeth are twisted by the thread twisting die. The production process and the device for the double-chamfer straight-tooth press-fitting bolt can produce the double-chamfer straight-tooth bolt which effectively solves the problems that the straight teeth of the bolt are removed and iron powder is removed from a hub in the press-fitting process, and meanwhile, the invention has the automatic guide function, can improve the production efficiency and save the cost.
Description
Technical Field
The invention belongs to the technical field of fastener production, and particularly relates to a production process and a device for a double-chamfer straight-tooth press-fitting bolt.
Background
At present, during the assembly process of automobiles, the connection between different parts is usually realized by fasteners, and bolts are one of the most common mechanical parts. A bolt is a cylindrical threaded fastener fitted with a nut. The bolt is matched with the nut and is used for fastening and connecting two parts with through holes.
As long as the hand piece is a product with unthreaded holes, for example, a hub bolt applied to an automobile hub often has the phenomenon that straight teeth are shaved off or iron powder is removed from the hub in the press fitting process, the assembling performance requirements are seriously influenced by the conditions, the scrappage is high, and the cost and the yield are directly influenced. It is important to design and produce bolts that effectively address the above problems.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a double-chamfer straight-tooth press-fitting bolt production process and a double-chamfer straight-tooth press-fitting bolt production device, which can produce bolts effectively solving the problems that straight teeth of the bolts are removed and iron powder is removed from a hub in the press-fitting process, and meanwhile, the double-chamfer straight-tooth press-fitting bolt production process is high in production efficiency and saves cost.
The purpose of the invention can be realized by the following technical scheme: a production process of a double-chamfer straight-tooth press-fitting bolt is characterized by comprising the following steps of: comprises the following steps of (a) carrying out,
s1: selecting raw materials for processing bolts;
s2: putting the raw material in the S1 into a station, and processing the rod diameter of the thread twisting part;
s3: putting the product obtained in the step S2 into a second station, and preforming the rod diameters of the head part and the straight tooth twisting part;
s4: placing the product obtained in the step S3 into three stations, wherein the three stations comprise a head forming step, b straight tooth twisting part rod diameter forming step and double-chamfer forming step, and c tail end chamfer forming step;
s5: and (5) rolling straight teeth of the product obtained in the step (S4) through a thread rolling die.
Further, the station comprises the steps of placing the raw material into a first female die, and machining the rod diameter of the thread twisting part of the raw material by using a die ejector pin and the first female die.
Furthermore, a first groove is formed in the first female die, a first through hole is formed in the bottom of the first groove, a first female die ejector pin is movably arranged in the first through hole, and the first groove is ejected out of the raw material after the rod diameter of the thread twisting part is machined by the aid of the first female die ejector pin.
Further, the second station comprises the step of placing the raw material obtained in the first station into a second female die, and preforming the rod diameter of the head part and the straight tooth rubbing part by using a second punch and the second female die.
Furthermore, a second groove is formed in the second female die, a second through hole is formed in the bottom of the second groove, and a second female die ejector pin is movably arranged in the second through hole; the front part of the second die is provided with an opening, and the opening of the second die is a first divergent opening.
Further, the three stations comprise that the raw materials obtained in the two stations are placed into a third female die, a head forming, b straight tooth twisting part rod diameter forming and double-chamfer forming, and c tail chamfer forming are completed by using a third punch die and the third female die.
Furthermore, a third groove is formed in the third female die, a third through hole is formed in the bottom of the third groove, and a third female die ejector pin is movably arranged in the third through hole; the third die front opening, the third die opening comprising a second diverging opening and a third opening.
Further, the diameter of the third opening is equal to the maximum opening diameter of the second divergent opening.
Further, include, fuselage, control system, be used for processing rub with the hands a station of screw thread part pole footpath, be used for preforming head and rub with the hands two stations of the pole footpath of straight-tooth part, be used for accomplishing a, head shaping, b, rub with the hands straight-tooth part pole footpath shaping and two chamfer shaping, c, the fashioned three stations of tail end chamfer and be used for with the raw and other materials of a station take out and put into two stations snatch the mechanism, it still be used for with to snatch the mechanism raw and other materials in two stations are taken out and are put into in three stations, a station two stations reach three stations all set up in the fuselage, it is mobilizable set up in to snatch the mechanism the fuselage, a station two stations reach three stations reach it all with control system signal connection snatch the mechanism.
The invention has the beneficial effects that:
1. the first chamfer of the bolt produced by the invention can be pre-guided into the unthreaded hole of the counterpart piece in the bolt press-fitting process to play a good guiding role, so that the bolt is prevented from being inclined and plays a guiding and correcting function; the second chamfer is a longer small-taper chamfer, so that the straight tooth part of the bolt can be slowly pressed into the counterpart in the press fitting process, the resistance in the pressing process is reduced, the problem that the straight tooth is shaved off is solved, and the problem that iron powder falls off due to overlarge press fitting resistance is solved.
2. The invention improves the production efficiency of products, shortens the manufacturing period, saves the cost, improves the profit and ensures the stable production of large-batch bolts.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a flow chart of a process for producing a bolt provided by the present invention;
FIG. 2 is a schematic view of a station provided in accordance with the present invention;
FIG. 3 is a schematic diagram of a two-station system according to the present invention;
FIG. 4 is a schematic illustration of three stations provided by the present invention;
FIG. 5 is a bolt after a station process;
FIG. 6 is a bolt after two-station machining;
FIG. 7 is a three-station machined bolt;
FIG. 8 is a schematic view of a straight tooth rubbing plate.
In the figure:
1, a first female die; 2. punching a thimble; 3. a first female die thimble; 4. a second female die; 5. a second die; 6. a second concave die thimble; 7. a first diverging opening; 8. a third female die; 9. a third die; 10. a third concave die thimble; 11. a second diverging opening; 12. a third opening.
Detailed Description
The invention is further described below with reference to the accompanying drawings: as shown in fig. 1 to 8 in the attached drawings of the specification, a production process of a double-chamfer straight-tooth press-fitting bolt is characterized in that: comprises the following steps of (a) carrying out,
s1: selecting raw materials for processing bolts;
s2: putting the raw material in the S1 into a station, and processing the rod diameter of the thread twisting part;
s3: putting the product obtained in the step S2 into a second station, and preforming the rod diameters of the head part and the straight tooth rubbing part;
s4: placing the product obtained in the step S3 into three stations, wherein the three stations comprise a head forming step, b straight tooth twisting part rod diameter forming step and double-chamfer forming step, and c tail end chamfer forming step;
s5: the product obtained in S4 is straight-toothed by a thread rolling die.
Further, one station comprises the steps of putting the raw material into the first female die 1, and machining the rod diameter of the thread twisting part of the raw material by using the die ejector pin 2 and the first female die 1.
Further, first die 1 is relative with die thimble 2, die thimble 2 can move towards or deviate from first die 1, set up first recess in the first die 1, the bottom of first recess sets up first through-hole, mobilizable first die thimble 3 that sets up in the first through-hole, die thimble 2 moves towards the raw and other materials in the first die 1, raw and other materials are extruded by die thimble 2 and first die 1, after accomplishing the process, die thimble 2 deviates from first die 1 and moves, take out raw and other materials to two stations processing.
Further, the second station comprises the steps that the raw material obtained from the first station is placed in a second female die 4, a second groove is formed in the second female die 4, a second through hole is formed in the bottom of the second groove, and a second female die ejector pin 6 is movably arranged in the second through hole; the second die 5 is open at the front and the opening of the second die 5 is a first diverging opening 7. The second die 5 is opposite to the second concave die 4, the raw material enters a second station, and the rod diameters of the head part and the straight tooth rubbing part are preformed by the second die 5 and the second concave die 4. And after the working procedures are finished, taking out the raw materials to be processed in three stations.
Further, the third station comprises the step of putting the raw material obtained in the second station into a third female die 8, wherein a third groove is formed in the third female die 8, a third through hole is formed in the bottom of the third groove, and a third female die thimble 10 is movably arranged in the third through hole; the third die 9 is open at the front and the openings of the third die comprise a second diverging opening 11 and a third opening 12. The diameter of the third opening 12 is equal to the maximum opening diameter of the second diverging opening 11. And (c) utilizing a third die 9 and a third female die 8 to complete head forming, straight tooth twisting part rod diameter forming and double-chamfer forming, and tail end chamfer forming.
Further, by using a straight-tooth rubbing dental plate shown in fig. 8, straight teeth are rubbed out of the raw material obtained in the three stations through the straight-tooth rubbing dental plate, and then the target product is obtained. The first chamfer of the bolt produced by the invention can be pre-guided into the unthreaded hole of the counterpart piece in the bolt press-fitting process to play a good guiding role, so that the bolt is prevented from being inclined and plays a guiding and correcting function; the second chamfer is a longer small-taper chamfer, so that the straight tooth part of the bolt can be slowly pressed into the counterpart in the press fitting process, the resistance in the pressing process is reduced, the problem that the straight tooth is shaved off is solved, and the problem that iron powder falls off due to overlarge press fitting resistance is solved.
In addition to the production process of the double-chamfer straight-tooth press-fitting bolt, the invention also provides a production device of the double-chamfer straight-tooth press-fitting bolt, which comprises the following steps: the machine body, a control system, a station for processing rub the rod diameter of the screw thread part with hands, a two stations for preforming the head and rub the rod diameter of the straight-tooth part with hands, a be used for accomplishing a, the head shaping, b, rub the shaping of straight-tooth part rod diameter and two chamfer shaping, c, three stations of tail end chamfer shaping and be used for taking out the raw and other materials of a station and put into the mechanism that snatchs of two stations, it still is used for taking out the raw and other materials in two stations and put into three stations to snatch the mechanism, a station, two stations and three stations all set up in the machine body, it is mobilizable to snatch the mechanism and set up in the machine body, a station, two stations and three stations and snatch the mechanism.
The control system controls the grabbing mechanism to place the raw material into a first station, controls the rod diameter of the thread twisting part machined by the first station, and then controls the grabbing mechanism to take out the raw material in the first station and place the raw material in a second station; and (3) controlling the rod diameters of the preformed head part and the straight-tooth twisting part in the two stations, then controlling the grabbing mechanism to take out the raw materials in the two stations and putting the raw materials into the three stations, controlling the three stations to finish the molding of the head part a, the molding of the rod diameter of the straight-tooth twisting part and the molding of double chamfers, and the molding of the tail end chamfer. And after all the working procedures are finished, the control system controls the grabbing mechanism to take out the finished product bolt. The grabbing mechanism can be a mechanical arm, an automatic feeding and discharging mechanism and the like.
The application provides a apparatus for producing can the straight-tooth pressure equipment bolt of automatic processing double chamfer, has shortened manufacturing cycle, has improved product production efficiency, can guarantee to produce large batch bolt steadily.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.
Claims (9)
1. A production process of a double-chamfer straight-tooth press-fitting bolt is characterized by comprising the following steps of: comprises the following steps of (a) carrying out,
s1: selecting raw materials for processing bolts;
s2: putting the raw material in the S1 into a station, and processing the rod diameter of the thread twisting part;
s3: putting the product obtained in the step S2 into a second station, and preforming the rod diameters of the head part and the straight tooth twisting part;
s4: placing the product obtained in the step S3 into three stations, wherein the three stations comprise a head forming step, b straight tooth twisting part rod diameter forming step and double-chamfer forming step, and c tail end chamfer forming step;
s5: and (5) rolling straight teeth of the product obtained in the step (S4) through a thread rolling die.
2. The production process of the double-chamfer straight-tooth press-fitting bolt as claimed in claim 1, wherein the production process comprises the following steps: the first station comprises the steps of putting the raw material into a first female die, and machining the rod diameter of the thread twisting part of the raw material by using a stamping die thimble and the first female die.
3. The production process of the double-chamfer straight-tooth press-fitting bolt as claimed in claim 2, wherein the production process comprises the following steps: the thread rolling die is characterized in that a first groove is formed in the first female die, a first through hole is formed in the bottom of the first groove, a first female die ejector pin is movably arranged in the first through hole, and raw materials after the thread rolling part is machined are ejected out of the first groove through the first female die ejector pin.
4. The production process of the double-chamfer straight-tooth press-fitting bolt as claimed in claim 2, wherein the production process comprises the following steps: and the second station comprises the steps of putting the raw material obtained in the first station into a second female die, and preforming the rod diameter of the head part and the straight tooth twisting part by using a second punch die and the second female die.
5. The production process of the double-chamfer straight-tooth press-fitting bolt as claimed in claim 4, wherein the production process comprises the following steps: a second groove is formed in the second female die, a second through hole is formed in the bottom of the second groove, and a second female die ejector pin is movably arranged in the second through hole; the front part of the second die is provided with an opening, and the opening of the second die is a first divergent opening.
6. The production process of the double-chamfer straight-tooth press-fitting bolt as claimed in claim 4, wherein the production process comprises the following steps: and the three stations comprise that the raw materials obtained by the two stations are placed into a third female die, a and head forming, b and straight tooth twisting part rod diameter forming and double-chamfer forming, and c and tail chamfer forming are completed by utilizing a third punch die and the third female die.
7. The production process of the double-chamfer straight-tooth press-fitting bolt as claimed in claim 6, wherein the production process comprises the following steps: a third groove is formed in the third female die, a third through hole is formed in the bottom of the third groove, and a third female die ejector pin is movably arranged in the third through hole; the third die front opening, the third die opening comprising a second diverging opening and a third opening.
8. The production process of the double-chamfer straight-tooth press-fitting bolt as claimed in claim 7, wherein the production process comprises the following steps: the diameter of the third opening is equal to the maximum opening diameter of the second divergent opening.
9. The utility model provides a straight-teeth pressure equipment bolt apparatus for producing of two chamfers which characterized in that: including, fuselage, control system, be used for processing to rub a station of screw thread part pole footpath, be used for the preforming head and rub two stations of the pole footpath of straight-tooth part with the hands, be used for accomplishing a, the head shaping, b, rub straight-tooth part pole footpath shaping and two chamfer shaping, c, three stations of tail end chamfer shaping and be used for with the raw and other materials of a station take out and put into two stations snatch the mechanism, it still be used for with to snatch the mechanism raw and other materials in two stations take out and put into in three stations, a station two stations reach three stations all set up in the fuselage, it is mobilizable to snatch the mechanism set up in the fuselage, a station two stations reach three stations reach snatch the mechanism all with control system signal connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110066381.3A CN112792513A (en) | 2021-01-19 | 2021-01-19 | Production process and device for double-chamfer straight-tooth press-fitting bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110066381.3A CN112792513A (en) | 2021-01-19 | 2021-01-19 | Production process and device for double-chamfer straight-tooth press-fitting bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112792513A true CN112792513A (en) | 2021-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110066381.3A Pending CN112792513A (en) | 2021-01-19 | 2021-01-19 | Production process and device for double-chamfer straight-tooth press-fitting bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112792513A (en) |
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| CN209838905U (en) * | 2019-05-07 | 2019-12-24 | 苏州新凌高强度紧固件有限公司 | Wheel hub bolt with direction |
| CN209856194U (en) * | 2019-02-28 | 2019-12-27 | 北京富华鑫标准件有限公司 | Self-locking hub bolt |
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2021
- 2021-01-19 CN CN202110066381.3A patent/CN112792513A/en active Pending
Patent Citations (14)
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| JP2002219616A (en) * | 2001-01-23 | 2002-08-06 | Allied Material Corp | Tap |
| CN201433986Y (en) * | 2009-07-21 | 2010-03-31 | 任旭辉 | Knurled self-locking bolt |
| CN101780629A (en) * | 2010-04-08 | 2010-07-21 | 浙江裕泰紧固件制造有限公司 | Production process of special shaped screw bolt |
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| CN102601298A (en) * | 2012-03-29 | 2012-07-25 | 苏州新凌电炉有限公司 | Triangular self-tapping screw manufacturing process |
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Application publication date: 20210514 |