JPS59170217A - Method for measuring hardening depth - Google Patents

Abstract

PURPOSE:To measure simply the correct hardening depth of a shaft-shaped hardened article by determining beforehand the frequency of exciting power peculiar to the diameter of the article at which the iron loss and the heardening depth of the article has relation represented by a straight line. CONSTITUTION:A shaft 3 to be measured is put in the center hole 2 in an exciting coil 1, and the diameter D of the shaft 3 is inputted in a controller 6. The frequency of the AC power of an AC power source 4 set by the input is considered to be frequency at which the iron loss and the hardening depth of the shaft 1 of the diameter D has relation represented by a straight line. The value of power W from a wattmeter 5 is sent to the controller 6, and the iron loss is calculated from the power W and a constant K depending on the diameter D and the kind of the shaft 3. The hardening depth of the shaft 3 is then calculated and displayed on a display device 7.

Description

[Detailed Description of the Invention] [Industrial Field of Application] 1\The invention is based on 1~Filling Depth 1j
The software that defines L; relates to entering.

EfM New Technology] The depth of the hardened layer of the groove-shaped hardened material (referred to as the hardened depth after 1 step) is determined by the iron loss of the hardened layer and the hardened depth I of the hardened material. It can be measured using the fact that it varies in a roughly proportional manner depending on the type.

Such measurements can be performed, for example, as shown in FIG. That is, the hardened material 3 is passed through the center hole 2 of the excitation coil 1 wound in a donut shape, and AC power of, for example, 50 cycles is applied to the excitation coil from an AC power source to direct the magnetic flux to the hardened material.・The quenching depth is measured by making sure that the quenching layer penetrates sufficiently into the quenching layer No. 3, and detecting the 1 loss of the quenching layer. In the figure, the excitation coil 1 corresponds to the iron loss of this hardened layer by 9.4.
Determine the power from the power calculation 5, measure the depth, and calculate the depth.

However, in the above measurement, the core loss of the hardened layer and the hardened layer IQ are in a linear relationship (proportional relationship). 'i'lj is not definite using the linear relationship. That is, in the past, for example, 50 cycles were selected as the frequency of AC power that would allow sufficient magnetic flux to enter the hardened layer of general hardened materials.
Using multiple quenched products with different quenching depths regardless of the diameter of the quenched products, 0 is used to detect each individual 1C''!
3 There is a relatively proportional relationship between quenching and Q (the characteristic line of 1), and the linear part (△) and 1.
The quenching depth is determined from the iron loss, or the entire part is used and the detected iron loss is compared to the gonad to determine the quenching depth. In the case of , the measurement range becomes narrow by -1·λ, and in the case of many i, it becomes complicated.Also, in any case, the measurement box (Q does not necessarily fall within J~).

[Object 1 of the invention] Invention 1 aims to solve such problems.
I')' Toshikui "There is Shichichinoku.

[Invention (1, 1)] I (Kawaaki [Yoryoyo Teihai Hesashito) 1: (Human-quenched products,
1fil) In the method of measuring the quenching depth of the quenched material by placing it in the magnetic field lines of the quenched material and detecting the iron loss of the quenched material. The reciprocal of the diameter of the quenched material is set as a constant, and the quenching depth is in a linear relationship with the CY of the quenched material. [・71 Determine 'C for the wedge-shaped quenched material, measure the frequency of the excitation 1j electric power, and measure the frequency of the excitation 1j power. This is a new method for measuring quench depth.

The basis of the present invention 1 (J!) is based on the following experiment.

The diameter is D+ (=20mm) and the quenching depth is 1.
+(-'1ml:), t2<=
1. 5mm), t3 (=2m
m), j4 (=2.5mm), is (=3mm),
t6 ('3.5'n1ln) t? (-4n
1m) +' l: s (=4.5mm) t =
(= 5 mm), the diameter is D2 (= 30 mm), and the quenching depth is tl and t, respectively.
:, tz, 't, +, 'js, t6,17. js, t9
9 shirts] ~, the diameter is D3 (-400
1n1) Cy, l'c person j? je ji /
Riku person't l 1, L 2
, 1 3 , 1. /,
, jS.

6+'l-/, 12. [! ! 9 pieces x 7 points, 1'1 radius is D4 (=50111 m), and the quenching depth is 1, +, t2. , [3,L/,
, t S , t 6 , t , 7 , 18.1
Prepare 9 C V71-, which is
~ Next, the frequency gauze of excitation power [[!] (=511z
> , f 2 (=61-1z), f 3.
(-711z >'+ f 4 (=8
1-lz), fs (=9
f6(-101-1z), f7'
(=11.1-lz >, f gf=-1211z
>r+((--1311z >, f, a
(= 1/Il+/>, r, + <
=15 trlz), f, yu
(・ 161-11 >, “1s (=1711
z >, f,, t (=181-lz)
r,, (=19 t1z), f7t
(=201-1z) -r, t(=30
11z), and measured the smallpox and iron loss W. It should be noted that the most practical shirts 1 to 1 are made by soldering 17 pieces of diameter and quenched side +i as described above. Also, it is this rod '('
L ” t') Enough of the eastern part of the prefecture enters I~1^]
This is because the wave number (magnetic flux transmission rate is inversely proportional to the square of the frequency). This result is shown in Figures 3 to 6. Figures 3 to 6 show the frequency [of the excitation power], respectively. Parameters of diameter D+, D2.Dg, I) 4, quenched deep claw iron loss 1h bamboo () Fig. 5, No. 61:21 each of the hardened sides f!'g,', g'), Ir,! 17 is gender i
)1 la, diameter D + ノ';/t/l-"Q
Li The frequency of excitation power is f(a, D′i diameter D
1 dosha,) 1゛Ei' (5:C! (reduction, etc.), assuming that the constant that depends on 1 is 1, i':, 1f1 (hardened side) t ratio is 1 series, Straight line 1〕2 no si I7-no1゛・1
000 7. II Te, 1 and 2 are constants and then JP is quenched! It has been improved to a good standard and has a diameter of D3.
Same as 6, 1 (with 2 as a constant, iron loss (ma)) is proportional to the depth of z, and the diameter D4 is 1/F I ~ (゛ is It temple of f3, I
It can be seen that 1i per person is proportional to the quenching depth with X4 as a constant. From the above, it can be seen that the frequency of the excitation power at which the button loss of the shirt-like quenched material and the quenched side 1α is in a linear relationship exists depending on the diameter of the shirt-like quenched material.
I understand that. Incidentally, if J is determined in the experiment, the frequency of the excitation power at which the above linear relationship exists is 5iiZ-2011z for a shaft with a maximum of one pass. Well, then, in advance,
After determining the frequency at which the above linear relationship occurs according to the diameter of the ~-shaped quenched material, and when measuring the depth of the actual quenched material, the frequency of the excitation type)j is determined. By setting the frequency to be specific to the diameter of the quenched material and extracting the quenched side 1α from the detected iron loss, the exact quenched side can be easily obtained.

[Example] Figure 7 (shows (■ omitted) of a quenching depth measuring device showing an example of the method of the present invention; Figures 1 L and 2' (
The components that are the same as the incense used are the same.

In the figure, 6 is the function f, and 3 is a controller with fi function 1iif+: i
"At 7, the diameter of the externally input signal A. ] W (corresponds to the iron loss of the shaft), calculates the quenching depth 1 of the shaft 1~, and when the diameter of the seat 71~ is input, the frequency of the excitation power is calculated. Roll the AC power supply 4 two times so that the diameter becomes the value 111.7 is placed on the display that indicates the quenching depth. ,'ili'l fixed 1J shirts 1-3
into the center hole 2 of the excitation coil, and send the cylinder to the control device 6.
Enter the diameter of the foot 3.

The input is J, and the frequency of the AC power from the AC power supply 4 (31). Then, when the electric power W of the electric power ii1'571''' is sent to the chair 11 and the 11 equipment 6, the control device performs the W do R operation and calculates the quenching depth 10 of the shirt (... “Zuru.

Note that the frequency 10 specific to the diameter of the seat 71- can also be determined as follows.

The quenching depth and degree are 11. 2.1
3 of the three waters Al] +-10, 11, 12 is used! I'm going to do it. Then, each shirt 1- is placed in the center hole of the excitation coil 13, 14, 15, respectively, AC power is applied from the variable frequency power supply 1G, and the iron loss detector (power meter) 17, 18, 19 detects the iron loss. are detected and sent to the control device 20. At this time, when the frequency of AC power is first set to f1, people d1. (12, d
It is assumed that one static value of g has been detected. At this time, the control device 20 creates a straight line C in FIG. 9 from dl, The difference ((12' - +12
<O) is sent to the display 21. The indicator displays the difference.

The A verator reduces the AC power to 12 J, taking into consideration the positive/negative of the difference and the large contamination. At this time, v1 loss detector 17°18.1
9. The iron loss 1 of d 5 , d 6 , d 7 from
1C1 is detected and changed to 7j. The controller 20 creates the straight line shown in FIG.
) iif+ (16' and the output of the iron jO detector 18 (1
6 ((i 6 ' - (16>O) on display 2)
send to The frequency of the AC power is set to an appropriate value between f, , f, by taking the positive f1 and the large δ difference of A verator 1 and L as a group.

By repeating this hilly motion, the control device i20 creates a linear quenching depth (1 scale ↑ for 2) value d 9/
The frequency 'I41[0 of the AC power at which is equal to the output d9 of the iron loss detector 18 is determined. This frequency 10 is the Ji wave number specific to the diameter-hardened material (sit 171~).

[Effect 1 According to the present invention, there is a significant increase in personal connections in '3.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of a conventional quenching depth measuring device, Figure 2 (
, L quenching depth iron) t) + 'lXi properties, Figs. Koma1) 1, Figure 7 shows an example of the method of the present invention. This diagram is used to explain how to find the frequency of 1 for each diameter of 1.). 1: Excitation coil 3: Shirts 1 to 4: AC power supply 5: Wattmeter 6: Applicant for the control equipment, representative of JEOL Co., Ltd. Ikuo - Fudai-moxibustion entry Kiyoshi *----Sakening 5 11 □ Knee ÷ Harisaki entry 5 Squeezing - 11 Ra 6 Jyoiri 5 N, Bashi□

Claims (1)

[Claims] Measurement In this method, the hardened material in the form of a ribbed shaft is placed in the magnetic field line of 1 field, and the iron 10 of the hardened material is detected to measure the hardened depth of the two persons. The iron loss and the hardened layer 1α have a linear relationship f, J−nζ) with the reciprocal of the diameter of the throat-shaped hardened material as a constant. ] Determine the frequency of the excitation power of Ij for shaft-shaped hardened products of various sizes - C6, measure the frequency of the excitation power (J The value of ゛ is used to measure the quenching depth of the quenched product.