CN203125677U

CN203125677U - Gear mold

Info

Publication number: CN203125677U
Application number: CN 201220742863
Authority: CN
Inventors: 王寅
Original assignee: TIANJIN HAOGAO MAGNETS CO Ltd
Current assignee: TIANJIN HAOGAO MAGNETS CO Ltd
Priority date: 2012-12-28
Filing date: 2012-12-28
Publication date: 2013-08-14
Anticipated expiration: 2022-12-28

Abstract

The utility model provides a gear mold. The gear mold is an annular groove, inner tooth grooves are formed in the edge of the inner side of the annular and are of rectangular structures, the radius of a fillet at the edge of each inner tooth groove is 0.5mm, and the exposed height of each inner tooth groove is 0.5-1mm. According to the gear mold, due to the unique design of the angle at edge of each inner tooth groove and the exposed height of each inner tooth groove, on the premise that the electromagnetic performance reaches or exceeds the standards of magnetic cores of the same type, the forming density of an annular body and the fillet inner tooth grooves of a magnetic core of a gear is uniform, deformation does not happen after sintering, and the gear mold is suitable for requirements of large-scale industrial production.

Description

A kind of gear die

Technical field

The utility model relates to magnetic core and makes field, especially a kind of gear die.

Background technology

Ferrite Material (ferrite) is by forming as some kinds of oxides of main cation composition with ferric ion, and presents ferrimagnetism or anti-ferromagnetic material.

Ferrite Material is a kind of ferromagnetic metal oxide that has.With regard to electrical characteristics, ferritic resistivity is more much bigger than metal, alloy magnetic material, and also has higher dielectric properties.Ferritic magnetic property has higher magnetic conductivity when also showing high frequency.Thereby ferrite has become the broad-spectrum nonmetal magnetic material in high frequency light current field.Because the magnetic energy that stores in the ferrite unit volume is lower, fullly closes the intensity of magnetization also lower (have only usually pure iron 1/3～1/5), thereby limited it in the low frequency forceful electric power of the magnetic energy density of having relatively high expectations and the application in high-power field.

Ferrite Material is a kind of nonmetal magnetic material, and it is to be formed by di-iron trioxide and one or more other metal oxides (for example: nickel oxide, zinc oxide, manganese oxide, magnesia, barium monoxide, strontium oxide strontia etc.) preparation sintering.Its relative permeability can be up to several thousand, and resistivity is 1011 times of metal, and eddy-current loss is little, is suitable for making the high-frequency electromagnetic device.Ferrite has Hard Magnetic, soft magnetism, square magnetic, gyromagnet and pressure magnetic five classes.Be once called as ferrite or magnetic ferrites, its production process and outer appearnce be pottery seemingly, thereby is also referred to as ferrite.Ferrite is the composite oxides of iron and other one or more proper metal elements, and character belongs to semiconductor, uses as magnetic medium usually, and most important difference is electric conductivity between ferrite magnetic material and the metal or alloy magnetic material.Usually the former resistivity is 102～108 Ω cm, and the latter has only 10-6～10-4 Ω cm.Wherein, to mainly contain MnZn system, NiZn system, MgZn be three major types to soft magnetic ferrite; If press the application characteristic parametric classification, can be divided into power ferrite material, high frequency ferrite material, high resistivity material, very high frequency(VHF) soft magnetic ferrite (hexaplanar high frequency ferrite), high frequency high power ferrite material etc.

The MnZn based ferrite has high initial permeability, higher saturation induction density, at radio intermediate frequency or low-frequency range low loss is arranged, it is the best Ferrite Material of the following band limits magnetic property of 1 megahertz, MnZn based ferrite initial permeability μ i=400-20000 commonly used, saturation induction density Bs=400-530mT.The resistivity of MgZn series ferrite material is higher, is mainly used in the deflection coil magnetic core of making kinescope or display tube.

NiZn based ferrite frequency of utilization 100kHz～100MHz, the highest 300MHz that uses, this class material magnetic conductivity is lower, and resistivity is very high, is generally 105～107 Ω cm.Therefore, the high-frequency vortex loss is little, is the optimum good timber material of the above high band magnetic property of 1MHz, the magnetic conductivity μ i=5-1500 of NiZn based material commonly used, saturation induction density Bs=250-400mT.

In recent years, along with the application of Ferrite Material more and more widely, Ferrite Material has been applied to the manufacturing of various inductors, transformer, wave filter and choke coil, and as hyundai electronics message areas such as computer and external equipment, business automation equipment, digital communication and artificial traffic equipment, internet, household electrical appliance, electromagnetic compatibility equipment, green illumination device, industrial automations, with automobile, aviation, military field, this has just had higher to the characteristic of Ferrite Material and has had more requirement targetedly.

The sintering process of soft magnetic ferrite is the combined reaction process of a physics and chemical change, and it plays decisive role to magnetic core physical dimension and electromagnetic performance.Concerning high-permeability material, obtain the density height, the porosity is low, crystal grain is big and uniform FERRITE CORE, just must when sintering, strictness control sintering temperature, sintering time and sintering atmosphere, the vaporization at high temperature that appraises at the current rate, prevents ZnO that will control Mn ion and Zn ion simultaneously causes the prescription skew, guarantees the ferrite solid phase reaction again fully and suppress ingotism to form.Kiln programming rate in sintering process has direct relation to density, grain size and the uniformity of ferrite product, and the too fast crystallite dimension that will make of programming rate is inhomogeneous; Programming rate is too slow, and the ferrite density of then burning till is low, and pore obviously increases; In addition, in the calcination process, whether green density also is out of shape magnetic core behind the sintering material impact.

The utility model content

Technical problem to be solved in the utility model is to provide a kind of gear die.

For solving the problems of the technologies described above, the technical solution of the utility model is:

A kind of gear die, described gear die are cannelure, are provided with internal spline in the cannelure inside edge, and described internal spline is rectangular configuration, and described internal spline edge rounding radius is 0.5mm, and internal spline exposes and highly is 0.5-1mm.

Preferably, said gear mould, described internal spline expose and highly are 0.7mm.

Preferably, the said gear mould, described internal spline quantity is 8.

The utility model structure has following beneficial effect:

The said gear mould; expose unique design highly at internal spline edge special angle and internal spline; make and reach or be higher than under the prerequisite of magnetic core standard of the same type at electromagnetic performance; annular solid and the fillet internal spline compact density of the gear magnetic core that obtains are even; do not have distortion behind the sintering, be fit to requirements of large-scale industrial production.

Description of drawings

Fig. 1 is the structural representation of gear die described in the utility model.

Among the figure: 1-internal spline 2-cannelure

The specific embodiment

For further specifying the utility model, existing conjunction with figs. is described in detail:

As shown in Figure 1, a kind of gear die, described gear die are cannelure 2, be provided with internal spline 1 in cannelure 2 inside edges, described internal spline 1 is rectangular configuration, and described internal spline 1 quantity is 8, this internal spline 1 edge rounding radius is 0.5mm, and internal spline 1 exposes and highly is 0.7mm.

The above only is preferred embodiment of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims

1. gear die, it is characterized in that: described gear die is cannelure, is provided with internal spline in the cannelure inside edge, and described internal spline is rectangular configuration, and described internal spline edge rounding radius is 0.5mm, and internal spline exposes and highly is 0.5-1mm.

2. gear die according to claim 1 is characterized in that: described internal spline exposes and highly is 0.7mm.

3. gear die according to claim 1 and 2, it is characterized in that: described internal spline quantity is 8.