CN101660988A - Portable on-site Brinell hardness tester - Google Patents

Abstract

The invention provides a portable on-site Brinell hardness tester comprising a lifting device (2), a hydraulic augmentor (6), a displacement sensor (4), a pressure sensor (7) and a display (5), wherein the hydraulic augmentor is fixed above the lifting device and moves up and down along with the lifting device; the displacement sensor is arranged above the pressure bar of the augmentor to be usedfor measuring displacement; and the pressure sensor is arranged below the compression bar of the augmentor to be used for measuring pressure. The portable on-site Brinell hardness tester has the characteristics of good hydraulic airtightness, no oil leakage, integration of processing devices and measuring devices, simple measuring process, high measuring efficiency and low price.

Description

Portable on-site Brinell hardness tester

Technical field

The invention belongs to a kind of on-site detecting device of material hardness, it mainly is sintered carbide ball with certain diameter, effect in certain test power is pushed down into the test specimen surface, removal test power behind certain hour, and the acquisition impression is represented ball hardness number with the mean pressure that is born on the impression surface area.It is mainly used in the even forged steel of tissue odds and the hardness test of cast iron, and non-ferrous metal and mild steel, is used for starting material and half-finished detection more.

Background technology

Existing external Portable Brinell hardness tester is made up of augmentor and measurement mechanism.Its augmentor generally is by the lever counterweight, the structure more complicated, even use hydraulic means, but because domestic hydraulic seal immature, oil leakage phenomenon is more serious.And two autonomous devices need be worked respectively and just can be finished during in-site measurement hardness, and efficiency of measurement is low.Once more, existing on-site Brinell hardness tester is mostly from external introduction, the price comparison costliness, and domestic so far do not have on-site Brinell hardness tester to come out.

Summary of the invention

In order to overcome the difficulty on the prior art, the object of the present invention is to provide a kind of portable on-site Brinell hardness tester, adopt the device of lifting jack and lever system reinforcing, and originally be converted into ball hardness number with the measurement impression diameter with the method replacement that the measurement depth of cup is converted into ball hardness number.

The technical solution used in the present invention is as follows:

A kind of portable on-site Brinell hardness tester, comprise base, the hydraulic amplifier device, and pressure head, specifically be characterised in that: two parallel screw mandrels vertically are installed on described base, a jacking gear is installed on described two rhizoid bars, the described hydraulic amplifier device of fixed installation on described jacking gear, described hydraulic amplifier device has compression bar, the lower end of described compression bar connects described pressure head by a pressure transducer, fix on the described base sample clamping dish be in described pressure head under, a displacement transducer is housed on the described hydraulic amplifier device, and the output of described displacement transducer and pressure transducer is connected to a display.

The present invention is to measure depth of cup with new measuring method, and the computing formula of new ball hardness number is:

$\mathrm{HBW}\left(\mathrm{HBS}\right)=\frac{1}{G}\frac{2F}{\mathrm{\πD}(D-\sqrt{D^2-d^2})}=\frac{1}{G}\frac{F}{\mathrm{\πh}}$

HBS (HBW)---the ball hardness number that expression is measured with hardened steel ball pressure head (wimet pressure head).

In the formula:

F---test power, the N of unit;

S---impression surface area, the mm of unit;

D---ball pressure head diameter, the mm of unit;

H---depth of cup, the mm of unit; $h=\frac{D-\sqrt{D^2-{\mathrm{<figure-callout\; id="2"\; label="d"\; filenames="A2009101965410006H1.png"\; state="\{\{state\}\}">d</figure-callout>}}^2}}{2}$

D---impression diameter, the mm of unit

The present invention compared with prior art has following tangible substantive distinguishing features and advantage:

1. adopt the hydraulic amplifier device of lifting jack and lever composition, good seal performance is not easy leakage of oil.

2. adopt to measure method that depth of cup is converted into ball hardness number and replace the original method that is converted into ball hardness number with the measurement impression diameter can to solve the Brinell hardness impression bigger, product inspection oil is difficult, measures more time-consuming shortcoming.

3. processing unit (plant) and measurement mechanism one, measuring process is simple, the efficiency of measurement height.

4. price comparison is cheap.

Description of drawings

Fig. 1 is the structural representation of one embodiment of the invention;

Fig. 2 is the left side synoptic diagram of Fig. 1;

Fig. 3 is a hydraulic amplifier device synoptic diagram;

Embodiment

Details are as follows in conjunction with the accompanying drawings for a preferred embodiment of the present invention:

Referring to Fig. 1, this portable on-site Brinell hardness tester, comprise base 3, hydraulic amplifier device 6, with pressure head 8, specifically be characterised in that: two parallel screw mandrels 1 vertically are installed on described base 3, a jacking gear 2 is installed on described two rhizoid bars 1, the described hydraulic amplifier device 6 of fixed installation on described jacking gear 2, described hydraulic amplifier device 6 has compression bar 604, the lower end of described compression bar 604 connects described pressure head 8 by a pressure transducer 7, fix on the described base 3 a sample clamping dish 9 be in described pressure head 8 under, a displacement transducer 4 is housed on the described hydraulic amplifier device 6, and the output of described displacement transducer 4 and pressure transducer 7 is connected to a display 5.

Referring to Fig. 2, the structure of above-mentioned jacking gear is: a handle 11 is housed through driving gear 13 of two bevel gears, 12 transmissions on the lifting framework 10, by two follower gears of described driving gear 13 transmissions, these two follower gears are fixedlyed connected with two nuts respectively, and described two nuts revolve with described two rhizoid bars 1 respectively joins.

Referring to Fig. 3, the structure of above-mentioned hydraulic amplifier device is: an installing plate 606 is fixedlyed connected with described lifting framework 10, a fixedly connected pole 607 on the described installing plate 606, and the middle part of the top of described pole 607 and a lever 602 is hinged; A lifting jack 601 is fixedly mounted on the described installing plate 606, the push rod upper end of described lifting jack 601 leans on the lower surface of described lever 602 1 ends, depression bar 603 of other end fixed installation of described lever 602, the lower surface of described depression bar 603 is pressed in the upper surface of described compression bar 604, there is convex shoulder the upper end of described compression bar 604, a stage clip 605 is sleeved on the compression bar 604, and the upper end is supported on the described convex shoulder, and the lower end is supported on the installing plate 606; Fixedly connected with installing plate 606 in the top that described displacement transducer 7 is placed in described depression bar 603.

The display 5 of present embodiment links to each other with pressure transducer 7 with displacement transducer 4, is convenient to show in real time the measured displacement pressure data, reads hardness number at last.

Claims (3)

1, a kind of portable on-site Brinell hardness tester comprises base (3), hydraulic amplifier device (6) and pressure head (8), specifically is characterised in that:

1) go up vertically installation two parallel screw mandrels (1) at described base (3),

2) go up an installation jacking gear (2) at described two rhizoid bars (1),

3) go up fixed installation described hydraulic amplifier device (6) at described jacking gear (2),

4) described hydraulic amplifier device (6) has compression bar (604), and the lower end of described compression bar (604) connects described pressure head (8) by a pressure transducer (7),

5) fix on the described base (3) a sample clamping dish (9) be in described pressure head (8) under,

6) on the described hydraulic amplifier device (6) displacement transducer (4) is housed, the output of described displacement transducer (4) and pressure transducer (7) is connected to a display (5).

2, portable on-site Brinell hardness tester according to claim 1, the structure that it is characterized in that described jacking gear (2) is: a handle (11) is housed through two bevel gears (12) driving gears of transmission (13) on the lifting framework (10), by two follower gears of described driving gear (13) transmission, these two follower gears are fixedlyed connected with two nuts respectively, and described two nuts revolve with described two rhizoid bars (1) respectively joins.

3, portable on-site Brinell hardness tester according to claim 2, the structure that it is characterized in that described hydraulic amplifier device (6) is: an installing plate (606) is fixedlyed connected with described lifting framework (10), described installing plate (606) is gone up a fixedly connected pole (607), and the middle part of the top of described pole (607) and a lever (602) is hinged; A lifting jack (601) is fixedly mounted on the described installing plate (606), the push rod upper end of described lifting jack (601) leans on the lower surface of described lever (602) one ends, an other end fixed installation depression bar (603) of described lever (602), the lower surface of described depression bar (603) is pressed in the upper surface of described compression bar (604), there is convex shoulder the upper end of described compression bar (604), a stage clip (605) is sleeved on the compression bar (604), and the upper end is supported on the described convex shoulder, and the lower end is supported on the installing plate (606); Fixedly connected with installing plate (606) in the top that described displacement transducer (7) is placed in described depression bar (603).

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