CN111963544B - Bolt fastener suitable for severe cold weather and production method of bolt - Google Patents

Bolt fastener suitable for severe cold weather and production method of bolt Download PDF

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Publication number
CN111963544B
CN111963544B CN202010748758.9A CN202010748758A CN111963544B CN 111963544 B CN111963544 B CN 111963544B CN 202010748758 A CN202010748758 A CN 202010748758A CN 111963544 B CN111963544 B CN 111963544B
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China
Prior art keywords
cavity
air
bolt fastener
bolt
heating
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CN202010748758.9A
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CN111963544A (en
Inventor
朱汉华
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Jiangsu Yonghao High Strength Bolt Co ltd
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Jiangsu Yonghao High Strength Bolt Co ltd
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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
    • F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
    • F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
    • F16B35/041—Specially-shaped shafts
    • 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
    • B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
    • B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
    • B23P19/06—Screw or nut setting or loosening machines
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • C21D1/28—Normalising
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/008—Heat treatment of ferrous alloys containing Si
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0093—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for screws; for bolts
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • 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
    • F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
    • F16B23/0084—Specially shaped nuts or heads of bolts or screws for rotations by a tool with a threaded engagement between the head of the bolt or screw and the tool
    • 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
    • F16B33/00—Features common to bolt and nut

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat Treatment Of Articles (AREA)
  • Connection Of Plates (AREA)

Abstract

The invention discloses a bolt fastener suitable for severe cold weather, which relates to the technical field of fastener production and structurally comprises a threaded rod piece, and is characterized in that the threaded rod piece is provided with a first cavity arranged along the central axis direction of the threaded rod piece, one end of the first cavity is provided with a notch, a limiting piece is arranged at the position of the notch, an elastic piece is arranged in the first cavity, the elastic piece is in contact sliding connection with a sliding block of the first cavity, and the sliding block is arranged at one side of the elastic piece, which is close to the notch; compared with the prior art, the bolt is not easy to brittle fracture, and the bolt is convenient to disassemble when other equipment is frozen together.

Description

Bolt fastener suitable for severe cold weather and production method of bolt
Technical Field
The invention relates to the technical field of bolt production, in particular to a bolt fastener suitable for severe cold weather and a production method of a bolt.
Background
High strength bolt is the vital connecting piece among engineering machine tool installation and the monolithic integration, and whether its quality can reach the bearing capacity, life and the security performance that the design needs direct influence overall structure, in some extremely cold areas, after sleet weather, outdoor equipment's bolt often freezes together with equipment, and the staff is difficult to break away from the bolt from equipment this moment, and then also can't maintain equipment, and in winter, the bolt takes place fragility fracture easily.
Therefore, compared with the prior art, the bolt fastener is not easy to brittle fracture and is convenient to disassemble under the condition that other equipment is frozen together.
Disclosure of Invention
Compared with the prior art, the bolt is not easy to brittle fracture and is convenient to disassemble under the condition that other equipment is frozen together.
The invention is realized by the following technical scheme: a bolt fastener suitable for severe cold weather structurally comprises a threaded rod piece and is characterized in that the threaded rod piece is provided with a first cavity arranged along the central axis direction of the threaded rod piece, one end of the first cavity is provided with an opening, a limiting piece is arranged at the position of the opening, an elastic piece is arranged in the first cavity, the elastic piece is in contact with a sliding block in sliding connection with the first cavity, and the sliding block is arranged on one side, close to the opening, of the elastic piece; the threaded rod piece comprises an end portion, a supporting portion and a threaded portion which are sequentially connected, at least one air outlet channel with an air inlet end and an air outlet end is arranged on the surface of the supporting portion, and the air inlet end of the air outlet channel is communicated with the first cavity.
The bolt fastener is suitable for severe cold weather, when the bolt fastener and fastening equipment are frozen together, a tool is inserted into a first cavity, the bolt fastener is heated through the first cavity, so that the frozen bolt fastener and the fastening equipment are melted by a bolt, a sliding block is arranged in the first cavity and used for protecting a second cavity, the sliding block is blocked by a limiting piece under the action of an elastic piece, the limiting piece and the sliding block can both be made of rubber materials, a sealing groove is arranged on the sliding block, a limiting bulge is arranged on the limiting block, the sealing groove and the limiting bulge are matched with each other, the limiting bulge is embedded into the sealing groove, the sealing effect is enhanced, the limiting part abuts against the opening of the first cavity, the opening is sealed, foreign matters are prevented from entering the second cavity, and the tool is prevented from being inserted into the first cavity, in the bolt fastener, the end part is clamped by a common tool and then disassembled, the supporting part and the thread part are both used for heating, an air outlet channel for discharging hot air is arranged on the surface of the supporting part, the hot air acts on the fastening equipment, and the tool heats the thread part, so that the temperature of the whole bolt fastener is increased.
Preferably, for the limiting groove, at least one limiting groove which is linearly arranged is formed in the position of the supporting section on the inner wall of the first cavity, the air outlet channel is arranged to be arranged along the limiting groove, the limiting groove is arranged to facilitate the insertion of a tool, and the tool is used in the process of aligning the air outlet hole with the air outlet channel, and the tool cannot rotate in the first cavity, so that the alignment of the air inlet end of the air outlet channel of the air outlet hole can be ensured.
Preferably, in order to reinforce the quality of the supporting part, at least two reinforcing grooves are formed in the outer surface of the supporting part, and air outlet holes of the air outlet channel are formed in the gap between every two adjacent reinforcing grooves.
Preferably, in order to conveniently mount the bolt fastener and the tool together, the second cavity and the threaded rod piece are provided with the second cavity, threads are arranged on the inner wall of the second cavity, and the threaded block and the second cavity are combined together in the process of using the tool.
The invention also discloses a tool for disassembling the bolt fastener, which is used for disassembling the bolt fastener and comprises a driving motor, a driving rod piece and a bolt, wherein the driving motor is arranged to drive the rod piece to rotate, and the outer surface of the rod piece is provided with a convex block; the blowing mechanism is arranged to act on the rod piece and blows hot air out; a screw block arranged to rotatably connect the rod member through a bearing; wherein, air-out section and heating section have been arranged to the member, and air inlet channel has been arranged to air-out section axis position department, and air inlet channel circumference is provided with hot air channel, and hot air channel along the radial setting of air-out section, and the outer wall size of heating section is the same with first cavity inner wall size, and it has a plurality of electrical heating mechanisms that set up along member axis direction to inlay the heating section surface, and when the heating section inserted first cavity, electrical heating mechanism contacted first cavity inner wall.
Wherein, in the use process of the tool, the thread block is in thread fit with the second cavity, so that the tool is fixedly connected with the bolt fastener, when the tool is used, the rod piece is inserted into the first cavity, the air outlet section is contacted with the supporting part, the heating section is contacted with the thread section to supply power to the tool, the electric heating mechanism is used for heating the inner wall of the thread section in a contact manner, the air blowing mechanism blows out hot air, the hot air is ejected out of the air outlet channel and acts on equipment connected with the bolt fastener, so that liquid between the bolt fastener and the equipment connected with the bolt fastener which is frozen together in the open air is melted, the bolt fastener and the equipment connected with the bolt fastener can be disassembled, at the moment, the driving motor is started, the convex block is embedded into the limiting groove due to the arrangement of the convex block, the rotation of the motor enables the bolt fastener to rotate along with the rotation of the motor, so that the disassembly of the bolt fastener can be completed, for the blowing mechanism, the blowing mechanism can be composed of a shell, a blowing fan and a heating resistance wire, wherein the surface of the shell is provided with a hot air opening, and the heating resistance wire is arranged at the position of the hot air opening to blow out hot air.
Preferably, hot-blast passageway includes the first air inlet opening of being connected with air inlet channel and the first air-out opening of being connected with the air-out section, the size of first air inlet opening is greater than first air-out opening, this kind of design can make hot-blast from spouting out with higher speed to air-out opening position department, to hot-blast passageway, it comprises the space of two round platform forms, the bottom area of the space of two round platform forms is the same and contact together, when hot-blast bottom position department through at the round platform space, because the space grow, hot-blast speed is comparatively slow, afterwards, follow first air-out opening position department again and erupt gas.
The invention also discloses a production method of the bolt fastener, and the bolt fastener comprises the following chemical components in percentage by mass: c: 0.40 to 0.43%, Si: 0.20 to 0.25%, Mn: 0.85-0.90%, Cr: 1.05-1.10%, Mo: 0.20 to 0.22%, Ni: 0.20 to 0.25%, Al: 0.025-0.030%, P is less than or equal to 0.018%, S is less than or equal to 0.010%, Nb: 0.03-0.04%, N: 0.0050-0.0070% and the balance of Fe and inevitable impurities.
The production method of the steel for the bolt fastener comprises the working procedures of smelting, continuous casting, heating, continuous rolling and heat treatment; a heat treatment process, wherein an integral quenching and tempering heat treatment process is adopted, the normalizing temperature is 850-900 ℃, and the normalizing time is 0.5-1.0 h; the quenching temperature is 850-890 ℃, and the quenching time is 1.0-1.5 h; the tempering temperature is 560-620 ℃ and the tempering time is 2.0-3.5 h.
Wherein, the production step of bolt includes:
s100: machining the steel by machining, and machining the wool ingredients into products in the shapes of parts according to the sizes and the shapes of drawings;
s200: placing a product in the shape of a part in heating equipment, heating to 500 ℃ in a vacuum environment, and preserving heat for a period of time;
s300: after the heat preservation, controlling the heating equipment to cool the product in the heating equipment by 100 ℃ per hour; when the temperature is cooled to below 300 ℃, cooling the product in the heating equipment by air;
s400: when the product in the heating device is cooled to room temperature, the product is taken out, ground and cleaned to obtain the bolt fastener.
The invention discloses a bolt fastener suitable for severe cold weather and a production method of the bolt, compared with the prior art, the bolt fastener comprises the following steps:
the bolt fastener is suitable for severe cold weather, when the bolt fastener and the fastening equipment are frozen together, a tool is inserted into the first cavity, the bolt fastener is heated through the first cavity, so that the frozen bolt fastener and the fastening equipment are melted, the sliding block is arranged in the first cavity and used for protecting the second cavity, the sliding block is blocked by the limiting part under the action of the elastic part, the limiting part and the sliding block can be made of rubber, the sliding block is provided with a sealing groove, the limiting block is provided with a limiting bulge, the sealing groove is matched with the limiting bulge, the limiting bulge is embedded into the sealing groove, and the sealing effect is enhanced, the bolt fastener is characterized in that the bolt fastener is limited and abutted against the opening of the first cavity, the opening is sealed, foreign matters are prevented from entering the second cavity, and a tool is prevented from being inserted into the first cavity.
Drawings
FIG. 1 is a schematic external view of a bolt fastener according to the present invention;
FIG. 2 is a cross-sectional view of the bolt fastener of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at a;
FIG. 4 is a schematic view of the sliding sleeve of the present invention showing an angle;
FIG. 5 is a cross-sectional view taken along the line b-b in FIG. 2;
FIG. 6 is a schematic view of a tool for removing a bolt fastener according to the present invention;
FIG. 7 is a cross-sectional view taken along A-A of FIG. 6;
fig. 8 is a schematic view of the blowing mechanism in the tool for removing the bolt fastener.
Detailed Description
As shown in fig. 1 to 8, the invention discloses a bolt fastener suitable for severe cold weather, a production method of the bolt and a tool for disassembling the bolt fastener, as shown in fig. 1 to 3, the bolt fastener suitable for severe cold weather structurally comprises a threaded rod member 1, and is characterized in that the threaded rod member 1 is provided with a first cavity 2 arranged along the central axis direction of the threaded rod member 1, one end of the first cavity is provided with a notch, a limiting member 4 is arranged at the position of the notch, an elastic member 3 is arranged in the first cavity 2, the elastic member 3 is in contact with a sliding block 5 in sliding connection with the first cavity 2, and the sliding block 5 is arranged at one side of the elastic member 3 close to the notch; the screw rod piece 1 comprises an end part 11, a supporting part 12 and a screw thread part 13 which are sequentially connected, at least one air outlet channel 121 with an air inlet end and an air outlet end is arranged on the surface of the supporting part 12, and the air inlet end of the air outlet channel 121 is communicated with the first cavity 2.
Based on the structure, the bolt fastener is suitable for severe cold weather, when the bolt fastener and fastening equipment are frozen together, a tool is inserted into the first cavity 2, the bolt fastener is heated through the first cavity 2, so that the frozen bolt fastener and the fastening equipment are melted by a bolt, the sliding block 5 is arranged in the first cavity 2 and used for protecting the second cavity 2, the sliding block 5 is blocked by the limiting part 4 under the action of the elastic part 3, the limiting part 4 and the sliding block 5 can be made of rubber materials, the sliding block 5 is provided with a sealing groove, the limiting part 4 is provided with a limiting bulge, the sealing groove and the limiting bulge are matched with each other, the limiting bulge is embedded into the sealing groove, the sealing effect is enhanced, the limiting part abuts against the opening of the first cavity 2, and the opening is sealed, the bolt fastener of the invention has the advantages that the end part 11 is used for clamping the bolt fastener by a common tool and then disassembling the bolt fastener, the supporting part 12 and the thread part 13 are used for heating, the surface of the supporting part 12 is provided with an air outlet channel 121 for discharging hot air, the hot air acts on the fastened equipment, and the tool heats the thread part 13, so that the temperature of the whole bolt fastener is improved.
Further, as shown in fig. 4, for the limiting groove 21, at least one limiting groove 21 linearly arranged is provided at the position of the supporting portion 12 on the inner wall of the first cavity 2, wherein the air outlet channel 121 is arranged to be arranged along the limiting groove 21, the limiting groove 21 is arranged to facilitate the insertion of a tool, and in the using process of the tool, the air outlet hole is aligned with the air outlet channel 121, the tool cannot rotate in the first cavity 2, so that the air outlet hole is aligned with the air inlet end of the air outlet channel 121, wherein, in order to reinforce the quality of the supporting portion 12, at least two reinforcing grooves 122 are provided on the outer surface of the supporting portion 12, and the air outlet hole of the air outlet channel 121 is provided at the gap between two adjacent reinforcing grooves 122.
Further, in order to facilitate the installation of the bolt fastener and the tool, the threaded rod 1 is provided with a second cavity 111, threads are arranged on the inner wall of the second cavity 111, and the threaded block 63 and the second cavity 111 are combined together in the process of using the tool.
As shown in fig. 5, the present invention also discloses a tool for disassembling a bolt fastener, for disassembling the bolt fastener, the tool comprising a driving motor 61 arranged to drive a rod member 64 to rotate, the rod member 64 having a projection 6414 arranged on an outer surface thereof; a blowing mechanism 62 arranged to act on the rod 64, the blowing mechanism 62 blowing out hot air; a screw block 63 arranged to rotatably connect the rod 64 through a bearing; wherein, air-out section 641 and heating section 642 have been arranged to member 64, air inlet channel 6411 has been arranged to air-out section 641 axis position department, air inlet channel 6411 circumference is provided with hot-blast passageway 6413, and hot-blast passageway 6413 sets up along the radial of air-out section 641, the outer wall size of heating section 642 is the same with first cavity 2 inner wall size, it has a plurality of electric heating mechanism 6421 that set up along member 64 axis direction to inlay the surface of heating section 642, when heating section 642 inserts first cavity 2, electric heating mechanism 6421 contacts the inner wall of first cavity 2.
Based on the structure of the tool, during the use of the tool, the thread block 63 is in thread fit with the second cavity 111, so as to fixedly connect the tool and the bolt fastener together, when the tool is used, the rod 64 is inserted into the first cavity 2, so that the air outlet section 641 is in contact with the supporting part 12, the heating section 642 is in contact with the thread section 13, so as to supply power to the tool, the electric heating mechanism 6421 is used for heating the inner wall of the thread section 13 in contact, the air blowing mechanism 62 blows out hot air, the hot air is ejected from the air outlet channel 121 and acts on the equipment connected with the bolt fastener, so as to melt the liquid between the bolt fastener and the equipment connected with the bolt fastener, which is frozen together in the open air, so that the bolt fastener and the equipment connected with the bolt fastener can be detached, at this time, the driving motor 61 is started, because the projection block 6414 is arranged, the projection block 6414 is embedded into the limiting groove 21, and the motor 61 rotates, make bolt fastener also rotate thereupon to can accomplish the dismantlement to bolt fastener, to blowing mechanism 62, blowing mechanism 62 can comprise shell 621, fan 622 and heating resistor wire 623 of blowing, and hot-blast opening 624 has been seted up on the shell 621 surface, and heating resistor wire 623 sets up in hot-blast opening 624 position department, blows out hot-blastly.
Further, as shown in fig. 6 to 8, the hot air channel 6413 includes a first air inlet opening connected to the air inlet channel 6411 and a first air outlet opening connected to the air outlet segment 641, and the size of the first air inlet opening is larger than that of the first air outlet opening, so that the hot air can be ejected at a higher speed from the position of the air outlet opening, the hot air channel 6413 is composed of two truncated cone-shaped spaces, the bottom areas of the two truncated cone-shaped spaces are the same and are in contact with each other, when the hot air passes through the bottom of the truncated cone-shaped space, the speed of the hot air is slower because the space is larger, and then, the air is ejected from the position of the first air outlet opening.
The invention also discloses a production method of the bolt fastener, and the bolt fastener comprises the following chemical components in percentage by mass: c: 0.40 to 0.43%, Si: 0.20 to 0.25%, Mn: 0.85-0.90%, Cr: 1.05-1.10%, Mo: 0.20 to 0.22%, Ni: 0.20 to 0.25%, Al: 0.025-0.030%, P is less than or equal to 0.018%, S is less than or equal to 0.010%, Nb: 0.03-0.04%, N: 0.0050-0.0070% and the balance of Fe and inevitable impurities.
The production method of the steel for the bolt fastener comprises the working procedures of smelting, continuous casting, heating, continuous rolling and heat treatment; a heat treatment process, wherein an integral quenching and tempering heat treatment process is adopted, the normalizing temperature is 850-900 ℃, and the normalizing time is 0.5-1.0 h; the quenching temperature is 850-890 ℃, and the quenching time is 1.0-1.5 h; the tempering temperature is 560-620 ℃ and the tempering time is 2.0-3.5 h.
Wherein, the production step of bolt includes:
s100: machining the steel by machining, and machining the wool ingredients into products in the shapes of parts according to the sizes and the shapes of drawings;
s200: placing a product in the shape of a part in heating equipment, heating to 500 ℃ in a vacuum environment, and preserving heat for a period of time;
s300: after the heat preservation, controlling the heating equipment to cool the product in the heating equipment by 100 ℃ per hour; when the temperature is cooled to below 300 ℃, cooling the product in the heating equipment by air;
s400: when the product in the heating device is cooled to room temperature, the product is taken out, ground and cleaned to obtain the bolt fastener.
In conclusion, compared with the prior art, the bolt is not easy to brittle fracture and is convenient to disassemble under the condition that other equipment is frozen together.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Claims (3)

1. A tool for disassembling a bolt fastener is characterized in that the bolt fastener comprises a threaded rod piece, the threaded rod piece is provided with a first cavity arranged along the central axis direction of the threaded rod piece, one end of the first cavity is provided with a notch, a limiting piece is arranged at the position of the notch, an elastic piece is arranged in the first cavity, the elastic piece is in contact sliding connection with a sliding block of the first cavity, and the sliding block is arranged on one side, close to the notch, of the elastic piece; the threaded rod piece comprises an end part, a supporting part and a threaded part which are sequentially connected, at least one air outlet channel with an air inlet end and an air outlet end is formed in the surface of the supporting part, and the air inlet end of the air outlet channel is communicated with the first cavity; at least one limiting groove which is linearly arranged is formed in the position of the supporting section on the inner wall of the first cavity, wherein the air outlet channel is arranged along the limiting groove; the outer surface of the supporting part is provided with at least two reinforcing grooves, an air outlet hole of an air outlet channel is arranged at the gap between every two adjacent reinforcing grooves, the threaded rod piece is provided with a second cavity, and threads are arranged on the inner wall of the second cavity;
the tool comprises:
the driving motor is arranged for driving the rod piece to rotate, and the outer surface of the rod piece is provided with a convex block;
the blowing mechanism is arranged to act on the rod piece and blows hot air out;
a threaded block arranged to rotatably connect the rod member through a bearing;
wherein, air-out section and heating section have been arranged to the member, air inlet channel has been arranged to air-out section axis position department, air inlet channel circumference is provided with hot air channel, just hot air channel is along the radial setting of air-out section, the outer wall size of heating section with first cavity inner wall size is the same, it has a plurality of electrical heating mechanisms that set up along member axis direction to inlay the heating section surface, when heating the section and inserting first cavity, electrical heating mechanism contacts first cavity inner wall.
2. The tool for removing a bolt fastener of claim 1, wherein the hot air channel includes a first air inlet notch connected to the air inlet channel and a first air outlet notch connected to the air outlet section, the first air inlet notch being larger in size than the first air outlet notch.
3. The production method of the bolt is characterized by being used for producing the bolt fastener as claimed in any one of claims 1 to 2, and the bolt fastener comprises the following chemical components in percentage by mass: c: 0.40 to 0.43%, Si: 0.20 to 0.25%, Mn: 0.85-0.90%, Cr: 1.05-1.10%, Mo: 0.20 to 0.22%, Ni: 0.20 to 0.25%, Al: 0.025-0.030%, P is less than or equal to 0.018%, S is less than or equal to 0.010%, Nb: 0.03-0.04%, N: 0.0050-0.0070% and the balance of Fe and inevitable impurities;
the production method of the steel for the bolt fastener comprises the working procedures of smelting, continuous casting, heating, continuous rolling and heat treatment; the heat treatment process adopts an integral quenching and tempering heat treatment process, wherein the normalizing temperature is 850-900 ℃, and the normalizing time is 0.5-1.0 h; the quenching temperature is 850-890 ℃, and the quenching time is 1.0-1.5 h; the tempering temperature is 560-620 ℃, and the tempering time is 2.0-3.5 h;
the production steps of the bolt comprise:
s100: machining the steel by machining, and machining the wool ingredients into products in the shapes of parts according to the sizes and the shapes of drawings;
s200: placing the product in the shape of the part in heating equipment, heating to 500 ℃ in a vacuum environment, and preserving heat for a period of time;
s300: after the heat preservation, controlling the heating equipment to cool the product in the heating equipment by 100 ℃ per hour; when the temperature is cooled to below 300 ℃, cooling the product in the heating equipment by air;
s500: and when the product in the heating equipment is cooled to room temperature, taking out the product, and grinding and cleaning the product to obtain the bolt fastener.
CN202010748758.9A 2020-07-30 2020-07-30 Bolt fastener suitable for severe cold weather and production method of bolt Active CN111963544B (en)

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CN113251053B (en) * 2021-04-07 2022-04-15 江苏永昊高强度螺栓有限公司 Bolt fastener suitable for severe cold weather
CN113528961B (en) * 2021-07-15 2022-06-17 承德建龙特殊钢有限公司 Continuous casting round billet for wind power yaw bearing and preparation method thereof

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CN103180088A (en) * 2011-10-26 2013-06-26 Newpol机械工程有限公司 Gas bolt heating apparatus
CN103615450A (en) * 2013-12-02 2014-03-05 北京化工大学 Spacecraft unlocking and separating device
CN204327701U (en) * 2014-10-11 2015-05-13 广东梅雁吉祥水电股份有限公司 Hydroelectric power plant's rotor coupling shaft bolt structure
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