CN109909685B - Manufacturing method of elbow screw - Google Patents
Manufacturing method of elbow screw Download PDFInfo
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- CN109909685B CN109909685B CN201910067135.2A CN201910067135A CN109909685B CN 109909685 B CN109909685 B CN 109909685B CN 201910067135 A CN201910067135 A CN 201910067135A CN 109909685 B CN109909685 B CN 109909685B
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Abstract
The invention discloses a manufacturing method of an elbow screw, which relates to the technical field of fasteners and comprises the following steps of S1: drawing wires; step S2: cutting off; step S3: slotting, namely, utilizing a cutter to open an arc-shaped groove on the steel wire section, wherein the arc-shaped groove is close to one end of the steel wire section and is arranged along the circumferential direction of the steel wire section; step S4: bending, namely bending one end of the steel wire section close to the arc-shaped groove by using a bending machine so as to divide the steel wire section into a straight rod part and a bending part, wherein the straight rod part and the bending part are intersected at the arc-shaped groove, and the bending part is bent towards the arc-shaped groove relative to the straight rod part; step S5: clamping a tail; step S6: thread rolling for the first time; step S7: heat treatment; step S8: and (6) coating. The invention is bent in the screw manufacturing process, so that finished screws are bent in the later period instead of bending, the cost is reduced, and the finished screws are prevented from being damaged by clamping in the later period in the bending process.
Description
Technical Field
The invention relates to the technical field of fasteners, in particular to a manufacturing method of an elbow screw.
Background
Screws are a common fastener and are widely used in machinery, electrical appliances and buildings. Generally, the device is made of metal or plastic, is cylindrical, and is called as a thread with grooves and protrusions carved on the surface, and the device parts are fastened step by utilizing the physics and mathematical principles of the inclined circular rotation and the friction of the objects, so that more than two objects are connected.
The elbow screw is made into a straight screw rod according to the common process, and then bent on a punch press, and the processing method has the advantages of low speed, long auxiliary time, addition of punch press equipment and high manufacturing cost.
Disclosure of Invention
The invention aims to provide a method for manufacturing an elbow screw, which is used for bending in the screw manufacturing process so as to replace the later bending of a finished screw, thereby not only reducing the cost, but also avoiding the clamping damage to the finished screw in the later bending process.
The purpose of the invention is realized by the following technical scheme:
a method for manufacturing an elbow screw, comprising the steps of, step S1: drawing, namely processing the steel wire by a wire rod drawing machine to obtain a corresponding diameter; step S2: cutting, namely cutting the drawn steel wire into steel wire sections with preset lengths; step S3: slotting, namely, utilizing a cutter to open an arc-shaped groove on the steel wire section, wherein the arc-shaped groove is close to one end of the steel wire section and is arranged along the circumferential direction of the steel wire section; step S4: bending, namely bending one end of the steel wire section close to the arc-shaped groove by using a bending machine so as to divide the steel wire section into a straight rod part and a bending part, wherein the straight rod part and the bending part are intersected at the arc-shaped groove, and the bending part is bent towards the arc-shaped groove relative to the straight rod part; step S5: clamping the tail, wherein one end of the straight rod part, which is far away from the bending part, is processed by a tail clamping machine to obtain a screw tail with a corresponding shape; step S6: performing primary thread rolling, namely performing thread rolling on the periphery of the straight rod part through a thread rolling machine, and processing a first thread on the straight rod part; step S7: performing heat treatment, namely performing medium-temperature quenching and low-temperature tempering on the screw subjected to the primary thread rolling; step S8: and (4) coating, namely coating the screw subjected to heat treatment.
Adopt above-mentioned technical scheme, at the in-process of processing elbow screw, carry out the wire drawing and cut off the steel wire earlier to obtain a plurality of diameters, the same steel wire section of length, then the one end of centre gripping steel wire section, fluting the other end of steel wire section, in order to obtain the arc wall, bend towards the arc wall then. Under the effect of arc wall to the crossing department of bending portion and straight pole portion is located arc wall department, thereby realizes the effect of location, with the precision that improves processing, then presss from both sides the tail, thread rolling to straight pole portion, then carries out heat treatment to the screw, in order to obtain the finished product screw. When buckling the steel wire section, one side at the position of bending of steel wire section receives the extrusion, and the opposite side receives the drawing, through setting up the arc wall to receive the position that extruded position provided deformation to the steel wire section, thereby be convenient for bend. Because when bending the screw among the prior art, need the centre gripping screw, can cause the injury to the screw thread on the screw to through set up the step of bending between cutting off and the clamp tail, with the influence that reduces the screw thread.
The invention is further configured to: in step S4, the angle of the arc-shaped groove is set to be 90-150 degrees.
Adopt above-mentioned technical scheme, under the normal condition, the lead screw is when bending, and the angle that receives the extrusion is 180 degrees usually, and receives the extrusion effort and reduces to both ends from the center of arc wall gradually to set up the angle of arc wall to 90 to 150 degrees, adapt to bending of wire section on the one hand, the both ends of on the other hand arc wall receive less extrusion effort, with the fifty percent discount has played the buffering effect of removal, and through the angle that reduces the arc wall, with the intensity of guaranteeing the wire section.
The invention is further configured to: the angle between the bending part and the straight rod part is 120-150 degrees, and in the step S4, the depth of the arc-shaped groove is 1/6-1/4 of the radius of the straight rod part.
Adopt above-mentioned technical scheme, the angle that will bend between portion and the straight rod portion sets up to 120~150 degrees, plays the positioning effect when can realizing using this elbow screw to and when this steel wire section is buckling, reduce the tensile effort that the steel wire section received for arc wall one side. The depth of the arc-shaped groove is 1/6-1/4 of the radius of the straight rod part, and the influence on the strength of the whole screw is reduced under the action of ensuring the arc-shaped groove.
The invention is further configured to: after the step S2 is completed, one end of the steel wire segment is processed by a heading machine to obtain a screw head, and during the processing of the step S3, the arc-shaped groove is disposed close to the screw head.
Adopt above-mentioned technical scheme, beat the head earlier before cutting off and fluting to make this screw have the spiral shell head, on the one hand can realize quick location through the spiral shell head when bending, on the other hand is convenient for carry on when the mounting screw handheld or cooperate corresponding instrument in order to drive the screw rotation. During heading, force is applied to the wire segments to strike the head between the slots to reduce the effect on the arcuate slots.
The invention is further configured to: after the heading operation is finished, the screw head is drilled by using the drilling tool so as to obtain a mounting opening at the screw head.
Adopt above-mentioned technical scheme, drill the spiral shell head through setting up the drilling cutter to in inserting the installing port with corresponding instrument, drive the screw and rotate, have convenient operation's advantage.
The invention is further configured to: step S8 further includes, S81: performing primary film coating, namely soaking the screw in anti-rust oil for 2-2.5 hours; step S82: wrapping an isolation film, and wrapping the isolation film on the bending part; step S83: and secondary coating, namely electroplating the straight rod part to form a wear-resistant layer on the surface of the straight rod part.
Adopt above-mentioned technical scheme, put into the antirust coat with the screw after the thermal treatment earlier and soak to obtain first antirust coat, this first antirust coat cladding is in the surface of whole screw, then electroplates straight rod portion, so that straight rod portion surface is formed with the wearing layer, thereby makes the straight rod portion of this elbow screw have rust-resistant and wear-resisting advantage, and the portion of bending has rust-resistant advantage.
The invention is further configured to: step S8 further includes step S84: and (3) coating for three times, taking down the isolating film, and soaking the screw in anti-rust oil for 1.5-2 hours.
By adopting the technical scheme, the wear-resistant layer is protected by arranging the third-time coating film, and the bent part is usually exposed in the air, so that the anti-rust oil is attached to the first anti-rust layer of the bent part again, and the anti-rust effect of the bent part is improved.
The invention is further configured to: and step S6 further comprises secondary thread rolling, after the thread rolling of the straight rod part is finished, the screw is taken out, the screw is clamped at the intersection of the bent part and the straight rod part by using a clamp, the bent part is secondarily rolled by using a thread rolling machine, and a second thread is obtained on the bent part.
By adopting the technical scheme, the first threads are obtained on the straight rod part by setting the primary thread rolling, and the second threads are obtained on the bending part by setting the secondary thread rolling, so that the bending part and the straight rod part can be in threaded connection.
The invention is further configured to: in step S8, a galvanization process is employed.
By adopting the technical scheme, the screw is galvanized, so that the protective layer is formed on the surface of the screw, and the screw has the advantages of wear resistance and rust resistance.
In conclusion, the beneficial technical effects of the invention are as follows:
(1) the arc-shaped groove provides a deformation position for the extruded part of the steel wire section, so that the steel wire section is convenient to bend, and the bending step is arranged between the cutting and the tail clamp to reduce the influence on the thread;
(2) set up the angle of arc wall into 90 to 150 degrees, the bending of adaptation wire section on the one hand, on the other hand is because the both ends of arc wall receive less extrusion effort to the buffer effect of removal has been played in the fifty percent discount, and through the angle that reduces the arc wall, with the intensity of straightening the wire section.
Drawings
FIG. 1 is a schematic diagram of the structure of the method shown in the first embodiment;
FIG. 2 shows an elbow screw obtained by the method according to the first embodiment;
FIG. 3 is a schematic view of the structure of the method shown in the second embodiment;
fig. 4 shows an elbow screw obtained by the method of the second embodiment.
Reference numerals: 1. an arc-shaped slot; 2. a screw head; 3. a straight rod part; 4. a bending part; 5. a first thread; 6. a second thread; 7. and (7) installing the opening.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Embodiment one, referring to fig. 1 and 2, a method for manufacturing an elbow screw includes the steps of,
step S1: and (3) drawing, namely processing the steel wire by a wire rod drawing machine to obtain a corresponding diameter, wherein the diameter can be 3.5-4.5 mm.
Step S2: and cutting, namely cutting the drawn steel wire into steel wire sections by using a cutting machine, wherein the lengths of the steel wire sections are the same, and the length of each steel wire section is 10-13 mm.
Then to accomplishing the steel wire section of cutting and taking lead, be about to install in the corresponding position department of taking lead machine the one end of steel wire section, then take lead to the steel wire section to obtain spiral shell head 2, spiral shell head 2's shape can be the setting of button head form, and to off-the-shelf elbow screw, spiral shell head 2 sets up with straight rod portion 3 is coaxial.
The steel wire section is not taken off, the drilling tool is directly utilized to drill the screw head 2 on the heading machine, so that a mounting opening 7 is obtained, the mounting opening 7 can be circularly arranged and coaxial with the screw head 2, the depth of the mounting opening 7 can be larger than or equal to that of the screw head 2, so that the corresponding tool can be clamped into the mounting opening 7, and the elbow screw is driven to rotate.
Step S3: slotting, utilizing the cutter to set up arc wall 1 to the steel wire section, arc wall 1 is close to the setting of spiral shell head 2, and arc wall 1 sets up along steel wire section circumference, and the angle of arc wall 1 sets up to 90~150 degrees, and the degree of depth of arc wall 1 is 3 radial 1/6~1/4 in straight rod portion to the bending of adaptation steel wire section, and the buffering effect of removal has been played to the bending.
Step S4: bend, utilize anchor clamps centre gripping wire section to keep away from the one end of spiral shell head 2, then utilize the bender to bend the other end of wire section, thereby divide into straight rod portion 3 and the portion 4 of bending with the wire section, the angle between portion 4 of bending and the straight rod portion 3 is 120~150 degrees, straight rod portion 3 intersects in arc wall 1 department with the portion 4 of bending, and the portion 4 of bending is for straight rod portion 3 towards 1 crooked of arc wall, wherein the portion 4 of bending is 1 with the length ratio of straight rod portion 3: 3.
step S5: and clamping the tail, clamping the intersection of the bending part 4 and the straight rod part 3 by using a clamp, and then processing one end of the straight rod part 3, which is far away from the bending part 4, by using a tail clamping machine so as to obtain the screw tail with a corresponding shape. The screw tail can be arranged in a needle point shape;
step S6: performing primary thread rolling, and after finishing tail clamping work, performing thread rolling on the periphery of the straight rod part 3 through a thread rolling machine, so as to machine a first thread 5 on the straight rod part 3;
step S7: and (3) performing heat treatment, namely washing and drying the screw subjected to the primary thread rolling, performing medium-temperature quenching at 400-450 ℃ for 40-55 minutes, and performing low-temperature tempering at 200-300 ℃ for 50-60 minutes.
Step S8: the film coating comprises the following small steps of,
step S81: and (3) coating the film for one time, and soaking the screw in anti-rust oil for 2-2.5 hours.
Step S82: and (3) wrapping an isolation film, wherein the isolation film is wrapped on the bent part 4, and can be an adhesive tape, so that an isolation effect is achieved on the bent part 4.
Step S83: and secondary coating, namely electroplating the straight rod part 3 to form a wear-resistant layer on the surface of the straight rod part 3, and then tearing off the isolating film to obtain the wear-resistant layer on the straight rod part 3.
Step S84: and (3) coating for three times, namely soaking the screw in anti-rust oil for 1.5-2 hours, so that the anti-rust layer on the bending part 4 is thickened, and the wear-resistant layer is protected.
The second embodiment is different from the first embodiment in that, referring to fig. 3 and 4,
a manufacturing method of an elbow screw comprises the following steps,
step S1: and (3) drawing, namely processing the steel wire by a wire rod drawing machine to obtain a corresponding diameter, wherein the diameter can be 3.5-4.5 mm.
Step S2: and cutting, namely cutting the drawn steel wire into steel wire sections by using a cutting machine, wherein the lengths of the steel wire sections are the same, and the length of each steel wire section is 10-13 mm.
Step S3: slotting, utilizing the cutter to set up arc wall 1 to the steel wire section, arc wall 1 is close to the setting of spiral shell head 2, and arc wall 1 sets up along steel wire section circumference, and the angle of arc wall 1 sets up to 90~150 degrees, and the degree of depth of arc wall 1 is 3 radial 1/6~1/4 in straight rod portion to the bending of adaptation steel wire section, and the buffering effect of removal has been played to the bending.
Step S4: bend, utilize anchor clamps centre gripping wire section to keep away from the one end of spiral shell head 2, then utilize the bender to bend the other end of wire section, thereby divide into straight rod portion 3 and the portion 4 of bending with the wire section, the angle between portion 4 of bending and the straight rod portion 3 is 120~150 degrees, straight rod portion 3 intersects in arc wall 1 department with the portion 4 of bending, and the portion 4 of bending is for straight rod portion 3 towards 1 crooked of arc wall, wherein the portion 4 of bending is 1 with the length ratio of straight rod portion 3: 3.
step S5: and clamping the tail, clamping the intersection of the bent part 4 and the rubber of the straight rod part 3 by using a clamp, and then processing one end of the straight rod part 3, which is far away from the bent part 4, by using a tail clamping machine so as to obtain the screw tail with a corresponding shape. The screw tail can be arranged in a needle point shape;
step S61: performing primary thread rolling, after finishing tail clamping work, clamping the intersection of the bent part 4 and the straight rod part 3 by using a clamp, and performing thread rolling on the periphery of the straight rod part 3 by using a thread rolling machine, so as to machine a first thread 5 on the straight rod part 3;
step S62: performing secondary thread rolling, namely reversing the screw to enable the bent part 4 to be opposite to a thread rolling cutter, and then performing thread rolling on the periphery of the bent part 4, so that a second thread 6 is machined on the bent part 4;
step S7: and (3) performing heat treatment, namely washing and drying the screw subjected to thread rolling, performing medium-temperature quenching at 400-450 ℃ for 40-55 minutes, and performing low-temperature tempering at 200-300 ℃ for 50-60 minutes.
Step S8: and (4) galvanizing.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (5)
1. A manufacturing method of an elbow screw is characterized by comprising the following steps,
step S1: drawing, namely processing the steel wire by a wire rod drawing machine to obtain a corresponding diameter;
step S2: cutting, namely cutting the drawn steel wire into steel wire sections with preset lengths;
step S3: slotting, namely, utilizing a cutter to open an arc-shaped groove (1) on the steel wire section, wherein the arc-shaped groove (1) is close to one end of the steel wire section and is arranged along the circumferential direction of the steel wire section;
step S4: bending, bending one end, close to the arc-shaped groove (1), of the steel wire section by using a bending machine, so that the steel wire section is divided into a straight rod part (3) and a bending part (4), the straight rod part (3) and the bending part (4) are intersected at the arc-shaped groove (1), the bending part (4) is bent towards the arc-shaped groove (1) relative to the straight rod part (3), the angle between the bending part (4) and the straight rod part (3) is 120-150 degrees, wherein the angle of the arc-shaped groove (1) is set to be 90-150 degrees, and the depth of the arc-shaped groove (1) is 1/6-1/4 of the radius of the straight rod part (3);
step S5: clamping the tail, wherein one end of the straight rod part (3) far away from the bending part (4) is processed by a tail clamping machine to obtain a screw tail with a corresponding shape;
step S6: performing primary thread rolling, namely performing thread rolling on the periphery of the straight rod part (3) through a thread rolling machine, and processing a first thread (5) on the straight rod part (3);
step S7: performing heat treatment, namely performing medium-temperature quenching and low-temperature tempering on the screw subjected to the primary thread rolling;
step S8: coating, namely coating the screw subjected to heat treatment;
the step S8 may further include,
step S81: performing primary film coating, namely soaking the screw in anti-rust oil for 2-2.5 hours;
step S82: wrapping an isolation film, and wrapping the isolation film on the bending part (4);
step S83: secondary coating, namely electroplating the straight rod part (3) to form a wear-resistant layer on the surface of the straight rod part (3);
step S84: and (3) coating for three times, taking down the isolating film, and soaking the screw in anti-rust oil for 1.5-2 hours.
2. The method of claim 1, wherein after the step S2, one end of the steel wire segment is headed by a heading machine to obtain the head (2), and the arc-shaped groove (1) is disposed adjacent to the head (2) during the process of the step S3.
3. A method of manufacturing an elbow screw according to claim 2, characterized in that after the heading operation is completed, the screw head (2) is drilled by means of a drilling tool to obtain a mounting opening (7) at the screw head (2).
4. The method for manufacturing an elbow screw according to claim 1, wherein the step S6 further comprises a second thread rolling, after the thread rolling of the straight rod part (3) is completed, the screw is taken out, the clamp is used for clamping the intersection of the bent part (4) and the straight rod part (3), the thread rolling machine is used for performing the second thread rolling on the bent part (4), and a second thread (6) is obtained on the bent part (4).
5. The method for manufacturing an elbow screw according to claim 4, wherein in step S8, a galvanization process is used.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910067135.2A CN109909685B (en) | 2019-01-24 | 2019-01-24 | Manufacturing method of elbow screw |
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| CN201910067135.2A CN109909685B (en) | 2019-01-24 | 2019-01-24 | Manufacturing method of elbow screw |
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| CN109909685A CN109909685A (en) | 2019-06-21 |
| CN109909685B true CN109909685B (en) | 2021-08-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH01289532A (en) * | 1988-05-14 | 1989-11-21 | Tokai T R W Kk | Method for forming tappet adjusting screw |
| CN103537878B (en) * | 2013-11-04 | 2015-07-08 | 宁波浩渤工贸有限公司 | Processing method for U-shaped double end bolt |
| CN106180534B (en) * | 2014-12-01 | 2018-01-02 | 温州科腾紧固件有限公司 | A kind of manufacture craft of elbow expansion bolt |
| CN108506304A (en) * | 2017-04-15 | 2018-09-07 | 裴志胜 | A kind of high strong pluck-resistant anchoring piece with bending slot |
| CN208014926U (en) * | 2018-03-12 | 2018-10-26 | 正泰电气股份有限公司 | A kind of angular transition connection conductor |
| CN108526826A (en) * | 2018-04-28 | 2018-09-14 | 鹏驰五金制品有限公司 | A kind of processing technology of high-strength bolt |
| CN108890223A (en) * | 2018-06-28 | 2018-11-27 | 浙江俊荣五金工业有限公司 | Locking double section silk screw production technologies |
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