CN103753496A - Bolt holder - Google Patents

Bolt holder Download PDF

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Publication number
CN103753496A
CN103753496A CN201410027056.6A CN201410027056A CN103753496A CN 103753496 A CN103753496 A CN 103753496A CN 201410027056 A CN201410027056 A CN 201410027056A CN 103753496 A CN103753496 A CN 103753496A
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China
Prior art keywords
shaped magnet
housing
bolt
clamping device
powder
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CN201410027056.6A
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CN103753496B (en
Inventor
盛汉姣
彭宏达
陈晓平
胡如夫
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Ningbo University Science Park Development Co ltd
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Ningbo University of Technology
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B29/00—Accessories
    • B25B29/02—Bolt tensioners
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047—Alloys characterised by their composition
    • H01F1/053—Alloys characterised by their composition containing rare earth metals
    • H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Hard Magnetic Materials (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)

Abstract

The invention relates to a bolt holder which comprises a shell with a cavity inside. The middle portion of the upper end face of the shell is concave downward to form a clamping portion, a clamping tool is fixedly connected with the inside of the clamping portion through a spring, a U-type magnet is arranged in the shell and can rotate in the shell, the opening end of the U-type magnet can be rotatably attached to the upper end face of the inside of the shell, and the U-type magnet is made of a neodymium iron boron permanent magnetic material. The bolt holder is simple in structure, convenient to use and good in fixing effect.

Description

Bolt fixator
Technical field
The invention belongs to field of mechanical technique, relate to bolt fixator, particularly a kind of bolt fixator that is applicable to stud.
Background technology
Stud is for connecting mechanical fixed-link function, and there is screw thread at stud two, and centre is screw rod, is generally used for machinery, automobile, motorcycle, boiler steel structure etc.At present in productive life, by stud solid mechanical, be usually to utilize the related tools such as monkey wrench to fix one end of stud, then with instruments such as another monkey wrenches, carry out the work fixing or that unscrew of tightening of nut, this process is time and effort consuming very, many times the larger people of mechanical ratio even cannot complete and tighten work fixing or that unscrew, to production, brings a lot of inconvenience.
Summary of the invention
The object of the invention is to have the problems referred to above for existing technology, proposed a kind of simple in structure, easy to use, better bolt fixator of fixed effect.
Object of the present invention can realize by following technical proposal: a kind of bolt fixator, comprise that inner is the housing of cavity, middle part, housing upper surface is recessed to form clamping part downwards, in clamping part, by spring, be fixed with a clamping device, enclosure interior is provided with a U-shaped magnet, and U-shaped magnet can rotate in housing and U-shaped magnet openend can rotate to adjacent enclosure interior upper surface; Wherein, described U-shaped magnet is made by Nd-Fe-Bo permanent magnet material, and described Nd-Fe-Bo permanent magnet material is become to be grouped into by following mass percent: Nd:14-18%, B:1.3-1.6%, Y:8-12%, Gd:3-6%, Si:0.8-1.1%, Mn:1.3-1.6%, Ti:0.1-0.3%, Zr:0.1-0.3%, Al:0.2-0.4%, Ga:0.1-0.2%, Dy:6-8%, Tb:0.8-1.4%, surplus is Fe and inevitable impurity.
Nd-Fe-Bo permanent magnet material is the current the strongest permanent magnet of magnetic in the world, is described as " king of permanent magnetism ".With it, replacing other permanent-magnet materials to make the U-shaped magnet of the present invention can make U-shaped magnet volume and weight decline at double, thereby can realize the U-shaped magnet of the present invention, in housing, rotate.But, along with current country significantly rises to its price of the control of rare earth element, in this case, should consider to reduce the use amount production control cost of counterweight rare-earth-type material in the performance that does not affect Nd-Fe-Bo permanent magnet material.And Curie temperature and the coercivity of Nd-Fe-Bo permanent magnet material are lower, there is the poor defect of processing characteristics in Nd-Fe-Bo permanent magnet material simultaneously.Therefore, the present invention is by the appropriate element of reasonable compatibility in Nd-Fe-Bo permanent magnet material, thereby can change magnetocrystalline anisotropy, crystal grain thinning, the raising coercivity of material and improve exchange-coupling interaction, obtain Curie temperature and coercivity is better, production cost is lower, the good Nd-Fe-Bo permanent magnet material of processing characteristics.
Wherein, in material, adding Dy element, is mainly Dy 2fe 14the intrinsic magnetic characteristic of B phase determines, Dy 2fe 14the magnetocrystalline anisotropy field of B is 150kOe, compares Dd 2fe 14the magnetocrystalline anisotropy field of B (70kOe) exceeds more than one times, and Curie temperature is 320 ℃, with Dd 2fe 14the Curie temperature of B is similar.So add appropriate Dy can improve to a great extent the coercivity of material in material, in addition, Dy refinement is soft, Hard Magnetic phase crystal grain, improve the formation temperature of α-Fe phase, reduce the formation temperature of Hard Magnetic phase, be to improve the most effective element of coercivity.But add too much Dy can form Dy 3fe 62b 14soft magnetism phase, may form the amorphous phase that is rich in Dy simultaneously, and the coercivity of material and magnetic property are declined rapidly.Therefore, the present invention shows after deliberation, when the addition of Dy is in the scope of 6-8% in material of the present invention, can form the Dy of stronger magnetocrystalline anisotropy 2fe 14b phase, has improved the coercivity of magnet.When but if the addition of Dy is greater than 8%, can cause the raising of soft magnetism phase and Hard Magnetic phase recrystallization temperature, make optimum crystallization temperature heat treatment temperature increase, cause soft magnetism to be grown up mutually and be unfavorable for the improvement of magnetic property.
The effect of Gd is similar with Dy, and it can improve the formation temperature of soft magnetism phase, reduces the formation temperature of Hard Magnetic phase, plays crystal grain thinning, improves the coercitive effect of material.And Y can reduce the density of Nd-Fe-Bo permanent magnet material, process velocity is improved.Therefore, the present invention is combined with keeping, under the prerequisite of NdFeB permanent magnetic material performance, more having substituted current expensive Nd to reduce production costs by interpolation Y and Gd's, reduces the difficulty of processing of Nd-Fe-Bo permanent magnet material simultaneously.
In addition, the adding of Tb element, what part substituted that Nd can make remanent magnetism reduces very littlely, and can increase the anisotropy of Hard Magnetic phase, improves the coercivity of material.Al, Mn, Zr, Ti and Ga element all can improve coercivity and the remanent magnetism in Nd-Fe-Bo permanent magnet material, the present invention adds Al, Mn, Zr, Ti and Ga element by reasonable compatibility simultaneously, has improved greatly coercivity and the remanent magnetism in Nd-Fe-Bo permanent magnet material.Appropriate Si element can improve Curie temperature, oxidation resistance and the corrosion resistance of Nd-Fe-Bo permanent magnet material.
In above-mentioned a kind of bolt fixator, the preparation method of described U-shaped magnet comprises the following steps:
S1, by the constituent of above-mentioned Nd-Fe-Bo permanent magnet material and mass percent thereof, prepare burden, then in vaccum sensitive stove, under inert gas shielding, be smelted into ingot casting;
S2, by inhale hydrogen after ingot casting coarse crushing in hydrogen broken furnace, process, then at 180-250 ℃, carry out dehydrogenation processing, mix for the first time powder after cooling, before mixed powder, add the grinding aid that accounts for raw material weight percentage 0.15-0.3%, mixed powder 30-40min;
S3, above-mentioned powder is added to air-flow abrasive dust in air-flow grinding machine, control powder mean particle sizes between 1-4 μ m, then add in mixed powder tank and add the lubricant that accounts for raw material weight percentage 0.8-1.2% to mix for the second time powder 1-2 hour;
S4, adopt Magnetic field press to be pressed into U-shaped magnet in above-mentioned powder and the static pressure such as carry out, hydrostatic pressure is 180-230MP, then in vacuum sintering furnace, in temperature, be first sintering 2-4 hour under 1200-1300 ℃ of condition, then in temperature, be sintering 4-5 hour under the condition of 700-900 ℃, in temperature, be finally Ageing Treatment 4-5 hour under the condition of 450-600 ℃, make U-shaped magnet.
In above-mentioned a kind of bolt fixator, the grinding aid in preparation method's step S2 of described U-shaped magnet is magnetic material grinding aid, and the lubricant in step S3 is magnetic material lubricant.
In above-mentioned a kind of bolt fixator, described housing is roughly hemispherical, and upper surface is plane.
In above-mentioned a kind of bolt fixator, on described housing, be interspersed with one with housing upper surface parallel rotation bar, the described U-shaped magnet that is positioned at enclosure interior is arranged on dwang.
In above-mentioned a kind of bolt fixator, the end that described dwang is positioned at outside housing is provided with spanner.
In above-mentioned a kind of bolt fixator, described clamping part is a circular cavity volume, clamping device is positioned at top, clamping part center and clamping device surrounding is respectively connected with a spring, and spring one end is connected with clamping part inwall, and the other end and clamping device are connected clamping device is fixed.
In above-mentioned a kind of bolt fixator, described clamping device has jaws, and described jaws is regular hexagon shape and jaws diminishes from outside to inside gradually.
In above-mentioned a kind of bolt fixator, described housing upper surface is provided with skid resistant course.
Compared with prior art, the present invention has following advantage:
1, when dwang rotates, with the U-shaped magnet rotation being arranged on dwang, when the rotation of U-shaped magnet openend is to when living enclosure interior upper surface, utilize the strongest principle of magnetic at U-shaped magnet two ends, make bolt fixator " suction " on bolt side mechanically, simultaneously, at magnet, hold mechanical moment, bolt along clamping device Open Side Down motion, thereby it is dead to be held tool holder, bolt is fixed, and so just can easily complete the work of twisting bolt other end nut;
2, housing is roughly hemispherically, and spherical shell has also farthest been saved material when guaranteeing that U-shaped magnet can rotate in housing, and edge is mellow and full smooth also safer, and upper surface is plane, better to mechanical absorption;
When 3, the starting stage is located this bolt fixator, perhaps have deviation, and clamping device is fixed by spring, mobile clamping device that can be suitable guarantees that clamping device clamps bolt;
4, when housing is adsorbed on mechanically, when tightening or loosering a bolt, can make housing rotation, skid resistant course has been avoided the stressed rotation of housing.
5, the U-shaped magnet in bolt fixator of the present invention adopts Nd-Fe-Bo permanent magnet material to make, and Nd-Fe-Bo permanent magnet material compatibility of the present invention is reasonable, the U-shaped magnet density for preparing is low, remanent magnetism and coercivity better, Curie temperature is higher, meanwhile, the production cost of the U-shaped magnet of the present invention and processing characteristics are all greatly improved.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is another structural representation of the present invention.
Fig. 3 is external structure schematic diagram of the present invention.
In figure, 1, housing; 2, spring; 3, clamping device; 4, dwang; 5, spanner; 6, U-shaped magnet; 7, skid resistant course.
The specific embodiment
Be below the specific embodiment by reference to the accompanying drawings of invention, technical scheme of the present invention is further described, but the present invention be not limited to these embodiment.
The present invention is intended to invent a kind of for tightening or unscrew the bolt fixator of stud, also can one man operation for big machinery, and also very convenient, practicality.
As Figure 1-3, this bolt fixator comprises that inside is the housing 1 of cavity, housing 1 middle part, upper surface is recessed to form clamping part downwards, in clamping part, by spring 2, be fixed with a clamping device 3, housing 1 inside is provided with a U-shaped magnet 6, and U-shaped magnet 6 can rotate to adjacent housing 1 inner upper end face in the interior rotation of housing 1 and U-shaped magnet 6 openends.
Starting stage, U-shaped magnet 6 is in level, clamping device in this bolt fixator clamping part 3 is aimed to one end of bolt, bolt fixator is being pasted to mechanical body, then the U-shaped magnet 6 in roll-shell 1, make U-shaped magnet 6 openends against living housing 1 inner upper end face, utilize the strongest principle of magnetic at U-shaped magnet 6 two ends, make bolt fixator " suction " on bolt side mechanically, bolt along clamping device 3 Open Side Down motion, thereby it is dead to be held instrument 3 folders, bolt one end is fixed, the nut of the other end that so just can easily tighten or looser a bolt, thereby finish the work.
As preferably, this bolt fixator housing 1 is roughly hemispherical, housing 1 circular arc portion and U-shaped magnet 6 circular arc portions are concentric circles fragment, when U-shaped magnet 6 can not touch housing 1 inwall during in the interior rotation of housing 1 yet, hemispherical not only good looking appearance, and while shelving sphere surrounding is round and smooth also safer upward, and more relatively save material and relative lighter with square housing 1.
Preferably, on housing 1, level is interspersed with a dwang parallel with upper surface 4, and dwang 4 is positioned at housing 1 horizontal center line position on the upper side, and the U-shaped magnet 6 in housing 1 is along with dwang 4 rotates, the end that dwang 4 stretches out outside housing 1 is provided with spanner 5, and spanner 5 is convenient to rotate dwang 4.
On the dwang 4 that U-shaped magnet 6 is installed and can rotate along with dwang 4, clockwise rotating bar 4 rotations rotates together with U-shaped magnet 6, U-shaped magnet 6 openends are upwards towards housing 1 upper surface rotation, after the sidewall of U-shaped magnet 6 openends turns over above housing 1, U-shaped magnet 6 keeps vertically arranging, because the position of the chamfering process of U-shaped magnet 6 sidewalls and end face in rotary course is the highest, therefore when U-shaped magnet 6 is positioned at vertical orientation, upper end is gapped apart from housing 1 inner upper end mask.
The clamping part of housing 1 upper surface is a circular cavity volume, clamping device 3 is positioned at top, clamping part center and clamping device 3 surroundings are respectively connected with a spring 2, spring 2 one end are connected with clamping part inwall, the other end and clamping device 3 are connected clamping device 3 is fixing, clamping device 3 has jaws, and described jaws is regular hexagon shape and jaws diminishes from outside to inside gradually.
When housing 1 is adsorbed on mechanically, bolt is along clamping device 3 Open Side Down motion, thereby it is dead to be held instrument 3 folder, and bolt is fixed.Because starting stage clamping device 3 can not finely be located, have certain deviation, when housing 1 rough alignment bolt, clamping device 3 snaps in of bolt, U-shaped magnet 6 sidewalls also have smaller magnetic, can be adsorbed on mechanically, then rotary U-type magnet 6 makes the adjacent housing 1 inner upper end face of openend, housing 1 just by adsorbed close mechanically, clamping device 3 is unsettled fixing by spring 2, spring 2 has tension force, the jaws of clamping device 3 is regular hexagon shape and jaws diminishes from outside to inside gradually, the horizontal level of clamping device 3 and highly can finely tuning voluntarily as required, when entering the interior suitable position of clamping device 3, bolt is just fixed later.
When housing 1 just by adsorbed close mechanically after, clamping device 3 is also just more convenient to the swivel bolt other end, because clamping device 3 is fixed by spring 2, now four springs 2 will oppositely apply pulling force to clamping device 3, are conducive to tightening or unscrewing bolt.
As preferably, housing 1 upper surface is that plane and upper surface are provided with skid resistant course 7, after housing 1 is adsorbed on mechanically, what when tightening or loosering a bolt, this bolt fixator was subject to is the frictional force in horizontal direction, skid resistant course 7 can make can not move or rotate in housing 1 horizontal direction, makes this bolt fixator result of use better.
This bolt fixer structure is simple, easy to use, is applicable to the bolt of all size scope, gives in industry life production and brings a lot of convenience, and utilization rate is very high.And U-shaped magnet used in this bolt fixator is made by Nd-Fe-Bo permanent magnet material, Nd-Fe-Bo permanent magnet material is become to be grouped into by following mass percent: Nd:14-18%, B:1.3-1.6%, Y:8-12%, Gd:3-6%, Si:0.8-1.1%, Mn:1.3-1.6%, Ti:0.1-0.3%, Zr:0.1-0.3%, Al:0.2-0.4%, Ga:0.1-0.2%, Dy:6-8%, Tb:0.8-1.4%, surplus is Fe and inevitable impurity.
Constituent and the mass percent of table 1 embodiment 1-4 Nd-Fe-Bo permanent magnet material
Embodiment 1:
Constituent and mass percent thereof by Nd-Fe-Bo permanent magnet material in table 1 embodiment 1 are prepared burden, and then in vaccum sensitive stove, under argon shield, are smelted into ingot casting.By inhale hydrogen after ingot casting coarse crushing in hydrogen broken furnace, process, then at 180 ℃, carry out dehydrogenation processing, mix for the first time powder after cooling, before mixed powder, add the magnetic material grinding aid that accounts for raw material weight percentage 0.15%, mixed powder 30min.After mixed powder, powder is added to air-flow abrasive dust in air-flow grinding machine, control powder mean particle sizes between 1-2 μ m, then add in mixed powder tank and add the magnetic material lubricant that accounts for raw material weight percentage 0.8% to mix for the second time powder 1 hour.After mixed powder, again powder is adopted Magnetic field press be pressed into U-shaped magnet and wait static pressure for the second time, hydrostatic pressure is 180MP, then in vacuum sintering furnace, in temperature, be first sintering 4 hours under 1200 ℃ of conditions, then in temperature, be sintering 5 hours under the condition of 700 ℃, in temperature, be finally Ageing Treatment 4 hours under the condition of 600 ℃, make U-shaped magnet.
Embodiment 2:
Constituent and mass percent thereof by Nd-Fe-Bo permanent magnet material in table 1 embodiment 2 are prepared burden, and then in vaccum sensitive stove, under argon shield, are smelted into ingot casting.By inhale hydrogen after ingot casting coarse crushing in hydrogen broken furnace, process, then at 200 ℃, carry out dehydrogenation processing, mix for the first time powder after cooling, before mixed powder, add the magnetic material grinding aid that accounts for raw material weight percentage 0.19%, mixed powder 33min.After mixed powder, powder is added to air-flow abrasive dust in air-flow grinding machine, control powder mean particle sizes between 2-3 μ m, then add in mixed powder tank and add the lubricant that accounts for raw material weight percentage 0.95% to mix for the second time powder 1.5 hours.After mixed powder, again powder is adopted Magnetic field press be pressed into U-shaped magnet and wait static pressure for the second time, hydrostatic pressure is 195MP, then in vacuum sintering furnace, in temperature, be first sintering 3.5 hours under 1230 ℃ of conditions, then in temperature, be sintering 4.5 hours under the condition of 780 ℃, in temperature, be finally Ageing Treatment 4.5 hours under the condition of 550 ℃, make U-shaped magnet.
Embodiment 3:
Constituent and mass percent thereof by Nd-Fe-Bo permanent magnet material in table 1 embodiment 3 are prepared burden, and then in vaccum sensitive stove, under argon shield, are smelted into ingot casting.By inhale hydrogen after ingot casting coarse crushing in hydrogen broken furnace, process, then at 220 ℃, carry out dehydrogenation processing, mix for the first time powder after cooling, before mixed powder, add the grinding aid that accounts for raw material weight percentage 0.20%, mixed powder 35min.After mixed powder, powder is added to air-flow abrasive dust in air-flow grinding machine, control powder mean particle sizes between 3-4 μ m, then add in mixed powder tank and add the lubricant that accounts for raw material weight percentage 1.0% to mix for the second time powder 2 hours.After mixed powder, again powder is adopted Magnetic field press be pressed into U-shaped magnet and wait static pressure for the second time, hydrostatic pressure is 220MP, then in vacuum sintering furnace, in temperature, be first sintering 3 hours under 1260 ℃ of conditions, then in temperature, be sintering 4 hours under the condition of 800 ℃, in temperature, be finally Ageing Treatment 5 hours under the condition of 500 ℃, make U-shaped magnet.
Embodiment 4:
Constituent and mass percent thereof by Nd-Fe-Bo permanent magnet material in table 1 embodiment 4 are prepared burden, and then in vaccum sensitive stove, under argon shield, are smelted into ingot casting.By inhale hydrogen after ingot casting coarse crushing in hydrogen broken furnace, process, then at 250 ℃, carry out dehydrogenation processing, mix for the first time powder after cooling, before mixed powder, add the grinding aid that accounts for raw material weight percentage 0.3%, mixed powder 40min.After mixed powder, powder is added to air-flow abrasive dust in air-flow grinding machine, control powder mean particle sizes between 1-3 μ m, then add in mixed powder tank and add the lubricant that accounts for raw material weight percentage 1.2% to mix for the second time powder 2 hours.After mixed powder, again powder is adopted Magnetic field press be pressed into U-shaped magnet and wait static pressure for the second time, hydrostatic pressure is 230MP, then in vacuum sintering furnace, in temperature, be first sintering 2 hours under 1300 ℃ of conditions, then in temperature, be sintering 5 hours under the condition of 700 ℃, in temperature, be finally Ageing Treatment 5 hours under the condition of 450 ℃, make U-shaped magnet.
The U-shaped magnet that above-described embodiment 1-4 is made carries out performance test, and test result is as shown in table 2.
The U-shaped magnet the performance test results that table 2 embodiment 1-4 makes
Figure BDA0000459764160000101
From table 2, can learn, the U-shaped magnet density that embodiment of the present invention 1-4 adopts the rational Nd-Fe-Bo permanent magnet material of compatibility to make is low, and U-shaped magnet volume and weight is declined, and can realize the U-shaped magnet of the present invention and rotate in housing.And U-shaped magnet remanent magnetism and coercivity that embodiment of the present invention 1-4 makes are better, U-shaped magnet magnetic is stronger, the U-shaped magnet that embodiment of the present invention 1-4 is made is for bolt fixator of the present invention, because U-shaped magnet magnetic is stronger, when dwang rotates, with the U-shaped magnet rotation being arranged on dwang, when the rotation of U-shaped magnet openend is to when living enclosure interior upper surface, utilize the strongest principle of magnetic at U-shaped magnet two ends, bolt fixator can better " be inhaled " on bolt side mechanically, simultaneously, at magnet, hold mechanical moment, bolt along clamping device Open Side Down motion, thereby it is dead to be held tool holder, bolt is fixed, so just, can easily complete the work of twisting bolt other end nut.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various modifications or supplement or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.

Claims (9)

1. a bolt fixator, it is characterized in that, comprise that inner is the housing of cavity, middle part, housing upper surface is recessed to form clamping part downwards, in clamping part, by spring, be fixed with a clamping device, enclosure interior is provided with a U-shaped magnet, and U-shaped magnet can rotate in housing and U-shaped magnet openend can rotate to adjacent enclosure interior upper surface; Wherein, described U-shaped magnet is made by Nd-Fe-Bo permanent magnet material, and described Nd-Fe-Bo permanent magnet material is become to be grouped into by following mass percent: Nd:14-18%, B:1.3-1.6%, Y:8-12%, Gd:3-6%, Si:0.8-1.1%, Mn:1.3-1.6%, Ti:0.1-0.3%, Zr:0.1-0.3%, Al:0.2-0.4%, Ga:0.1-0.2%, Dy:6-8%, Tb:0.8-1.4%, surplus is Fe and inevitable impurity.
2. a kind of bolt fixator according to claim 1, is characterized in that, the preparation method of described U-shaped magnet comprises the following steps:
S1, by the constituent of above-mentioned Nd-Fe-Bo permanent magnet material and mass percent thereof, prepare burden, then in vaccum sensitive stove, under inert gas shielding, be smelted into ingot casting;
S2, by inhale hydrogen after ingot casting coarse crushing in hydrogen broken furnace, process, then at 180-250 ℃, carry out dehydrogenation processing, mix for the first time powder after cooling, before mixed powder, add the grinding aid that accounts for raw material weight percentage 0.15-0.3%, mixed powder 30-40min;
S3, above-mentioned powder is added to air-flow abrasive dust in air-flow grinding machine, control powder mean particle sizes between 1-4 μ m, then add in mixed powder tank and add the lubricant that accounts for raw material weight percentage 0.8-1.2% to mix for the second time powder 1-2 hour;
S4, adopt Magnetic field press to be pressed into U-shaped magnet in above-mentioned powder and the static pressure such as carry out, hydrostatic pressure is 180-230MP, then in vacuum sintering furnace, in temperature, be first sintering 2-4 hour under 1200-1300 ℃ of condition, then in temperature, be sintering 4-5 hour under the condition of 700-900 ℃, in temperature, be finally Ageing Treatment 4-5 hour under the condition of 450-600 ℃, make U-shaped magnet.
3. a kind of bolt fixator according to claim 2, is characterized in that, the grinding aid in the preparation method of described U-shaped magnet in step S2 is magnetic material grinding aid, and the lubricant in step S3 is magnetic material lubricant.
4. a kind of bolt fixator according to claim 1, is characterized in that, described housing is roughly hemispherical, and upper surface is plane.
5. a kind of bolt fixator according to claim 4, is characterized in that, on described housing, be interspersed with one with housing upper surface parallel rotation bar, the described U-shaped magnet that is positioned at enclosure interior is arranged on dwang.
6. according to a kind of bolt fixator described in claim 4 or 5, it is characterized in that, described housing upper surface is provided with skid resistant course.
7. a kind of bolt fixator according to claim 6, is characterized in that, the end that described dwang is positioned at outside housing is provided with spanner.
8. according to a kind of bolt fixator described in claim 1 or 7, it is characterized in that, described clamping part is a circular cavity volume, clamping device is positioned at top, clamping part center and clamping device surrounding is respectively connected with a spring, spring one end is connected with clamping part inwall, and the other end and clamping device are connected clamping device is fixed.
9. a kind of bolt fixator according to claim 8, is characterized in that, described clamping device has jaws, and described jaws is regular hexagon shape and jaws diminishes from outside to inside gradually.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112609224A (en) * 2021-01-08 2021-04-06 赣州富尔特电子股份有限公司 Neodymium iron boron electroplating device

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CN2103146U (en) * 1991-07-24 1992-04-29 包头市磁材料应用研究所 Neodymium iron boron damping device for watt-hour meter
JP2000254823A (en) * 1999-03-10 2000-09-19 Mitsubishi Automob Eng Co Ltd Bolt feeder
CN102226492A (en) * 2011-05-24 2011-10-26 天津大学 Flange clamp used for bolt corrosion and line sealing
CN202556225U (en) * 2012-05-25 2012-11-28 胜方精密机械（浙江）有限公司 Grinding fixture based on surface determined by three points and positioning according to shape

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Publication number Priority date Publication date Assignee Title
CN2103146U (en) * 1991-07-24 1992-04-29 包头市磁材料应用研究所 Neodymium iron boron damping device for watt-hour meter
JP2000254823A (en) * 1999-03-10 2000-09-19 Mitsubishi Automob Eng Co Ltd Bolt feeder
CN102226492A (en) * 2011-05-24 2011-10-26 天津大学 Flange clamp used for bolt corrosion and line sealing
CN202556225U (en) * 2012-05-25 2012-11-28 胜方精密机械（浙江）有限公司 Grinding fixture based on surface determined by three points and positioning according to shape

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112609224A (en) * 2021-01-08 2021-04-06 赣州富尔特电子股份有限公司 Neodymium iron boron electroplating device

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