CN201892644U - Rockwell hardness measuring apparatus of large-size casting and forging piece - Google Patents
Rockwell hardness measuring apparatus of large-size casting and forging piece Download PDFInfo
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- CN201892644U CN201892644U CN2010206364583U CN201020636458U CN201892644U CN 201892644 U CN201892644 U CN 201892644U CN 2010206364583 U CN2010206364583 U CN 2010206364583U CN 201020636458 U CN201020636458 U CN 201020636458U CN 201892644 U CN201892644 U CN 201892644U
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- screw rod
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- displacement sensor
- pressure head
- circular cone
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Abstract
The utility model belongs to a technology for measuring the hardness of a casting and forging piece, and provides a Rockwell hardness measuring apparatus of a large-size casting and forging piece. A stand column (4) is fixedly connected with a V-shaped block (7), a compression mechanism is arranged on a top cover (8) which is connected with the stand column (4), and a screw rod is matched with a screw nut (2) to be capable of moving up and down and compressing a work piece (12) to be measured; a pressure sensor (5) is arranged between a conical indenter (6) at the lower end of the screw rod and the screw rod (11); a grating displacement sensor (3) is arranged on the inner wall of the stand column, the grating displacement sensor (3) is fixedly connected with the conical indenter (6) to form into a structure that the grating displacement sensor (3) can measure the depth of an indentation caused by the conical indenter (6) on the work piece; and a liquid crystal display (9) with a measurement button (10) is arranged on the top cover (8). The apparatus has the characteristics of being accurate, fast and convenient in measurement.
Description
Technical field
The utility model belongs to forge piece hardness measurement technical field, relates generally to a kind of rockwell hardness measurement instrument of heavy casting and forging.
Background technology
At present, the Rockwell's hardness of measuring workpieces is to use one of the most general hardness detection method, and rockwell hardness measurement is widely used in the various aspects of scientific research, production.The measuring method that the Rockwell's hardness of measuring workpieces is commonly used adopts the small workpiece of measuring sampling more, or after big workpiece is got sub-fraction, it is measured, the hardness number of the hardness number of sample being used as measured workpiece, these measuring methods have following limitation: (1) needs measured workpiece is taken a sample before measuring Rockwell's hardness, measure then, so, measuring period is long; (2) Qu Yang position difference can obtain different measurement results.For heavy casting and forging, because workpiece is bulky and the limitation of Technology for Heating Processing aspect, workpiece hardness everywhere itself is inconsistent, if sampling is improper before measuring, then can not obtain real measurement result; (3) some forge piece does not allow its key position is taken a sample.Therefore, it is portable and do not need hardness measurement instrument to measured workpiece sampling to need a kind of energy badly, to realize the measurement to heavy casting and forging arbitrary region Rockwell's hardness.
Summary of the invention
The purpose of this utility model is the rockwell hardness measurement instrument that proposes a kind of heavy casting and forging, directly the Rockwell's hardness of heavy casting and forging is measured, and shortens measuring period, reduces measuring error, improves the accuracy of rockwell hardness measurement.
The utility model is finished its invention task and is adopted following technical scheme to be:
A kind of rockwell hardness measurement instrument of heavy casting and forging has one and is used to locate the vee-block of placing measured workpiece, is set with two columns on the vee-block, and the upper end of two columns connects one by top cover; Top cover is provided with hold-down mechanism, and described hold-down mechanism has the screw rod that passes top cover; Screw rod upper end is provided with the rotation hand wheel that is used for the application of force, and screw rod cooperates with nut on being fixed on the top cover inwall, is formed in the structure that screw rod under the rotation hand wheel effect could move up and down and compress measured workpiece; Be provided with the circular cone pressure head in the lower end of screw rod, be provided with pressure transducer between circular cone pressure head and the screw rod; The inwall of described column is provided with grating displacement sensor, and described grating displacement sensor is fixedlyed connected with the circular cone pressure head by movable member, constitutes the structure that grating displacement sensor can be measured circular cone pressure head depth of cup on workpiece; On described top cover, LCD is set, has the measurement button on the LCD.
The rockwell hardness measurement instrument of the heavy casting and forging that the utility model proposes, have the characteristics accurately, fast and easily of measuring, can directly directly measure, saved the process of sampling each zone of heavy casting and forging, by digital indicator, can read measurement data more convenient, quickly.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is measuring principle figure of the present utility model.
Among the figure: 1, rotation hand wheel, 2, nut, 3, grating displacement sensor, 4, column, 5, pressure transducer, 6, the circular cone pressure head, 7, V-block, 8, top cover, 9, LCD, 10, measure button, 11, screw rod, 12, measured workpiece.
Embodiment
In conjunction with the accompanying drawings the utility model is further specified:
As shown in Figure 1, in conjunction with Fig. 2, a kind of rockwell hardness measurement instrument of heavy casting and forging has a vee-block 7, is used to place measured workpiece in the V-shaped groove of vee-block 7 and with the measured workpiece location, prevents that measured workpiece from rolling; Be fixedly connected with two columns 4 on the vee-block 7, the upper end of column 4 is connected one with top cover 8; Top cover 8 is provided with hold-down mechanism, and described hold-down mechanism has a screw rod 11, and screw rod 11 vertically passes top cover 8, and screw rod 11 upper ends are fixedly connected with rotation hand wheel 1, and rotation hand wheel 1 is a force application structure, and rotation hand wheel 1 is a circular handwheel; Nut 2 is fixedly connected on the top cover inwall and screw rod 11 and nut 2 threaded engagement, can move up and down and compress measured workpiece under rotation hand wheel 1 effect, and the center line of the axle center of cylindrical work and screw rod, vee-block is positioned on the same axis behind the workpiece pressing; Be provided with circular cone pressure head 6 in the lower end of screw rod 11, be provided with pressure transducer 5 between circular cone pressure head 6 and the screw rod; Fixedly connected with pressure transducer 5 in screw rod 11 lower ends, pressure transducer 5 is fixedlyed connected with circular cone pressure head 6, and pressure transducer 5 is used to measure the pressure size that circular cone pressure head 6 presses down; The inwall of described column 4 is provided with grating displacement sensor 3, grating displacement sensor 3 has the movable member of Displacement Measurement, grating displacement sensor 3 is fixedlyed connected with circular cone pressure head 6 by movable member, and grating displacement sensor can be measured the depth of cup of circular cone pressure head 6 on measured workpiece 12; On described top cover 8 LCD 9 is set, has the button 10 of measurement on the LCD 9, the depth of cup that grating displacement sensor records shows by LCD 9.
It is the hardness number of representing material with the degree of depth of impression that the utility model is measured Rockwell's hardness.During the test Rockwell's hardness, with the circular cone pressure head of stipulating, after-applied two loads of elder generation: preload and main load, total load are the summation of preload and master's load.
As shown in Figure 3, the 0-0 position is the circular cone ram position during application of load not; The 1-1 position is the position that applies after the 10kg preload, and compression distance is h
1The 2-2 position is the position that adds after the master loads, and this moment, compression distance was h
2The back is loaded because the position that the recovery of elastic deformation improves pressure head slightly for the removal master in the 3-3 position, and the actual compression distance of pressure head is h at this moment
3By the main remaining compression distance h=h that loads and cause
3-h
1, weigh the size of metal hardness value with this.
For the suitable high more custom notion of the big more hardness number of numerical value that it is believed that, artificial regulation: deduct the size that h represents hardness with a constant K, and stipulate that every 0.002mm is a Rockwell's hardness unit, the computing formula of Rockwell hardness number can be write as:
In the formula: h
1The degree of depth (mm) for the preloading pressing in sample; h
3For the removal master load the back pressing in sample the degree of depth (mm); K is a constant, for A and C scale, and K=0.2mm, for the B scale, K=0.26mm, therefore, the computing formula of Rockwell hardness number also can be write as:
For the utility model, surface measurements is the face of cylinder, and the reply experimental result is proofreaied and correct, and corrected value can calculate by following formula:
In the formula, the corrected value of Δ HRC for adding; HRC is the hardness on the face of cylinder; D is the diameter of cylinder.
During actual the test, can select different pressure heads and different main loads for use, rockwell hardness scale also changes thereupon, table 1 is various Rockwell scales and experiment condition, wherein, that the most frequently used is three kinds of HRA, HRB, HRC etc., and table 2 is the experiment condition and the application of these three kinds of rockwell hardness scales.
Various Rockwell scales of table 1 and experiment condition
The experiment condition of three kinds of rockwell hardness scales of table 2
Present embodiment is that 120 ° adamas circular cone pressure head, C scale is that example illustrates measuring process with tapering, 1), be rotated counterclockwise rotation hand wheel 1 measuring process of the present utility model is:, circular cone pressure head 6 is moved up, until the axle journal that entire measuring device can be inserted in workpiece for measurement 12, allow circular cone pressure head 6 aim at measured workpiece 12 detected part; 2), the rotation hand wheel 1 that turns clockwise, allow circular cone pressure head 6 slowly near workpiece 12 until contact, press this moment and measure button 10, zero clearing is carried out in the output of grating displacement sensor 3; 3), the rotation hand wheel 1 that continues to turn clockwise, 6 pairs of measured workpieces 12 of circular cone pressure head pressurize, pressure on the visual LCDs 9 shows, when being shown as 10kg power, pressure stops pressurization, press once more and measure button 10, at this moment, microprocessor is gathered the output valve h of grating displacement sensor 3
14), the rotation hand wheel 1 that continues to turn clockwise, 6 pairs of measured workpieces of circular cone pressure head 12 continue pressurization, the pressure on the visual LCDs (9) shows, when being shown as 150kg power, pressure stops pressurization, at this moment, press once more and measure button 10, microprocessor is gathered the output valve h of grating displacement sensor 3
2, pressurize 4-6 second; 5), pressurize 4-6 is after second, is rotated counterclockwise rotation hand wheel 1 and carries out off-load, microprocessor automatic pressure acquisition sensor 3 is the output valve h of zero that grating displacement sensor 3 constantly
36), at last by the computing of microprocessor, calculate the Rockwell hardness number of measured workpiece 12 according to above-mentioned formula, and output on the LCDs 9, finish hardness measurement process one time.
Claims (2)
1. the rockwell hardness measurement instrument of a heavy casting and forging is characterized in that: have one and be used to locate the vee-block (7) of placing measured workpiece, be set with two columns (4) on the vee-block (7), the upper end of two columns (4) connects one by top cover (8); Top cover (8) is provided with hold-down mechanism; Described hold-down mechanism has the screw rod (11) that passes top cover, the screw rod upper end is provided with the rotation hand wheel (1) that is used for the application of force, screw rod (11) cooperates with nut (2) on being fixed on the top cover inwall, be formed in rotation hand wheel (1) effect down screw rod can move up and down and compress the structure of measured workpiece (12); Be provided with circular cone pressure head (6) in the lower end of screw rod (11), be provided with pressure transducer (5) between circular cone pressure head (6) and the screw rod (11); The inwall of described column is provided with grating displacement sensor (3), grating displacement sensor (3) is fixedlyed connected with circular cone pressure head (6) by movable member, constitutes the structure that grating displacement sensor (3) can be measured circular cone pressure head (6) depth of cup on workpiece; LCD (9) is set on described top cover (8), has measurement button (10) on the LCD (10).
2. heavy casting and forging rockwell hardness measurement instrument as claimed in claim 1 is characterized in that: described rotation hand wheel (1) is a circular handwheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206364583U CN201892644U (en) | 2010-12-01 | 2010-12-01 | Rockwell hardness measuring apparatus of large-size casting and forging piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206364583U CN201892644U (en) | 2010-12-01 | 2010-12-01 | Rockwell hardness measuring apparatus of large-size casting and forging piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201892644U true CN201892644U (en) | 2011-07-06 |
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ID=44222116
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206364583U Expired - Fee Related CN201892644U (en) | 2010-12-01 | 2010-12-01 | Rockwell hardness measuring apparatus of large-size casting and forging piece |
Country Status (1)
| Country | Link |
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| CN (1) | CN201892644U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102967502A (en) * | 2011-09-01 | 2013-03-13 | 昆山溢阳潮热处理有限公司 | V-shaped platform for hardness detection |
| CN103308405A (en) * | 2012-03-13 | 2013-09-18 | 沈阳天星试验仪器有限公司 | Portable digital display hardness measuring device |
| CN105259061A (en) * | 2015-11-13 | 2016-01-20 | 广西玉柴机器股份有限公司 | Cam shaft Rockwell hardness detecting assembly |
| CN105403473A (en) * | 2015-11-03 | 2016-03-16 | 毛国强 | Digital display Rockwell hardness tester |
| CN109632473A (en) * | 2019-02-01 | 2019-04-16 | 江苏方天电力技术有限公司 | A kind of tubular part hardness measurement fixture |
-
2010
- 2010-12-01 CN CN2010206364583U patent/CN201892644U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102967502A (en) * | 2011-09-01 | 2013-03-13 | 昆山溢阳潮热处理有限公司 | V-shaped platform for hardness detection |
| CN103308405A (en) * | 2012-03-13 | 2013-09-18 | 沈阳天星试验仪器有限公司 | Portable digital display hardness measuring device |
| WO2013135026A1 (en) * | 2012-03-13 | 2013-09-19 | 沈阳天星试验仪器有限公司 | Portable digital display hardness measuring device |
| CN103308405B (en) * | 2012-03-13 | 2015-06-17 | 沈阳天星试验仪器有限公司 | Portable digital display hardness measuring device |
| CN105403473A (en) * | 2015-11-03 | 2016-03-16 | 毛国强 | Digital display Rockwell hardness tester |
| CN105259061A (en) * | 2015-11-13 | 2016-01-20 | 广西玉柴机器股份有限公司 | Cam shaft Rockwell hardness detecting assembly |
| CN109632473A (en) * | 2019-02-01 | 2019-04-16 | 江苏方天电力技术有限公司 | A kind of tubular part hardness measurement fixture |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110706 Termination date: 20131201 |