CN202442930U - Hardness detecting device - Google Patents
Hardness detecting device Download PDFInfo
- Publication number
- CN202442930U CN202442930U CN 201220090225 CN201220090225U CN202442930U CN 202442930 U CN202442930 U CN 202442930U CN 201220090225 CN201220090225 CN 201220090225 CN 201220090225 U CN201220090225 U CN 201220090225U CN 202442930 U CN202442930 U CN 202442930U
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- pressure head
- hardness
- hydraulic cylinder
- protective sleeve
- support
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Abstract
The utility model discloses a hardness detecting device, which belongs to the field of the hardness detection device, and comprises a vertical support, wherein the upper end of the support is fixedly provided with an upper hydraulic cylinder, the lower end of the upper hydraulic cylinder is provided with a freely-retractable pressure head, a supporting seat is arranged below the pressure head, a free end of the pressure head is a conical sharp end, and the periphery of the pressure head is provided with a protection sleeve. The outer side of the pressure head of the original device is additionally provided with the protection sleeve, and the protection sleeve is used as a reference for determining a zero position of the pressure head, so that when the hardness detecting device is used for measuring the hardness of a work-piece to be measured with an arc surface, the connector hardness test efficiency and the test precision can be greatly improved.
Description
Technical field
The utility model relates to a kind of checkout equipment, belongs to hardness checkout equipment field, especially a kind of drill pipe sub place hardness pick-up unit that is used for.
Background technology
The drilling rod production and processing has very high requirement for joint hardness, therefore after the drill pipe sub modifier treatment, needs butt junction hardness to carry out 100% test.When hardness test is carried out in most domestic drill pipe sub manufacturer butt junction at present, all be employed in joint surface polishing plane after, utilize the pressure head extruding burnishing part of hardness pick-up unit, carry out hardness through the Brinell hardness method of testing and detect and judge.
When adopting traditional Brinell hardness method of testing,, therefore very high requirement is arranged for load mould shape after the hardness test owing to need carry out the calculating of hardness number according to the load mould diameter that hardness test produced.Because the general hardness number of drill pipe sub is about 300HB, and the hardness number of hardness test pressure head is higher than joint hardness far away and reaches more than the 600HB, and is therefore as shown in Figure 3 in the load mould shape of hardness test, according to the Brinell hardness value calculating method
Can know because the distortion of impression causes pit diameter accurately to measure, therefore use the measured value of HB method and actual hardness to have than mistake.
Traditional HB method need be measured impression diameter and then convert ball hardness number into, and whole measurement process need is observed the impression situation through optical microscope, and efficient is lower.The surface of drill pipe sub simultaneously is a cambered surface, needs to carry out hardness test again behind the polishing plane, and this causes the whole production automaticity not high, and production capacity is lower.
The utility model content
The technical matters that the utility model will solve provides a kind of hardness pick-up unit, when this device detects, need directly not obtain hardness number to the curved surfaces polishing of drill pipe sub, and this device can improve the reliability of hardness test.
For solving the problems of the technologies described above; The technical scheme that the utility model is taked is: a kind of hardness pick-up unit, comprise the support of vertical placement, and the upper end of said support is fixed with hydraulic cylinder; Said lower end of going up hydraulic cylinder is provided with the pressure head that freely stretches; The below of pressure head is provided with supporting seat, it is characterized in that: the free end of said pressure head is conical tip, is provided with protective sleeve around the pressure head.
Said structure is done further restriction, the pipe of said protective sleeve for moving freely vertically, said pressure head is positioned at the center of pipe.In the utility model, protective sleeve is placed in the pressure head outside, in use; One side as reference, is confirmed the load mould degree of depth of pressure head with protective sleeve, guarantees the zero position of pressure head; Improve accuracy of measurement, can avoid the measuring error that causes because of surface of the work fat residue to be checked etc. on the other hand.
Said structure is done further restriction, and the middle part of said support is provided with host computer, and said host computer is connected with protective sleeve with pressure head through sensor.Increased host computer in the utility model, gone out the load mould degree of depth, calculated the hardness number of workpiece to be checked, made the production line automation flow process increase substantially through the surface configuration penalty method through sensor measurement.
Said structure is done further restriction, and the below of said supporting seat is provided with down hydraulic cylinder, and the said hydraulic cylinder of going up is connected with the external hydraulic station with following hydraulic cylinder.Go up hydraulic cylinder in the utility model and be used to exert pressure, following hydraulic cylinder can be adjusted the height of supporting seat, makes the utility model can detect various workpiece, improves applicability.
Adopt the beneficial effect that technique scheme produced to be: the utility model has increased protective sleeve through the pressure head outside at original device; Utilize protective sleeve to confirm the pressure head zero position as a reference; Be used for the workpiece for measurement surface and be the hardness measurement of arc, significantly improved joint hardness test efficient and increased testing precision; In addition, the utility model utilizes host computer to calculate, and original HB method need be passed through optical microscope measuring load mould diameter, is converted into the method for directly passing through load mould degree of depth conversion ball hardness number, makes the production line automation flow process increase substantially.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation.
Fig. 1 is the structural representation of the utility model;
Fig. 2 is that the position of pressure head and protective sleeve concerns synoptic diagram in the utility model;
Fig. 3 is a load mould test synoptic diagram;
Wherein, 1, support, 2, go up hydraulic cylinder, 3, pressure head, 4, supporting seat, 5, hydraulic cylinder down, 6, host computer, 7, Hydraulic Station, 8, protective sleeve, 9, workpiece to be checked.
Embodiment
Can know according to accompanying drawing 1; The utility model is specifically related to a kind of hardness pick-up unit, comprises the support 1 of vertical placement, and the upper end of support 1 is fixed with hydraulic cylinder 2; The lower end of last hydraulic cylinder 2 is provided with the pressure head 3 that freely stretches; The below of pressure head 3 is provided with supporting seat 4, and the free end of pressure head 3 is conical tip, is provided with protective sleeve 8 around the pressure head 3.The pipe of protective sleeve 8 for moving freely vertically, pressure head 3 is positioned at the center of pipe.Be provided with host computer 6 at the middle part of support 1 in addition, host computer 6 is connected with protective sleeve 8 with pressure head 3 through sensor, and the below of supporting seat 4 is provided with down hydraulic cylinder 5, and last hydraulic cylinder 2 is connected with external hydraulic station 7 with following hydraulic cylinder 5.
Host computer 6 in the utility model can adopt and grind magnificent industrial computer.
Be the concrete method of application that example is explained the utility model below with the drill pipe sub.
Because after the drill pipe sub modifier treatment, joint surface may residual a spot of quenching wet goods oil substances, and so, a small distortion will take place under the effect of load sample, has just increased the degree of depth that is pressed into, so just reduced hardness number.In order to address this problem the accuracy that to utilize the utility model to guarantee hardness number.
At first be placed on drill pipe sub below the pressure head 3, require the area of workpiece 9 to be checked to exceed the size of protective sleeve 8; When pressure head 3 pressed down the arrival testing surface simultaneously with protective sleeve 8 then, pressure head 3 was return, and at this moment the pressure that maintenance preloads utilize host computer 6 to accomplish the zero position calibration automatically; Then apply operating load, remove operating load at last through last hydraulic cylinder 2, and the position of record pressure head 3, the difference of this position and zero position is the load mould degree of depth.Through load mould degree of depth conversion ball hardness number, obtain the hardness number of drill pipe sub.
As long as sample has fixing yield strength, the load mould degree of depth that records so is exactly constant, thus the error of having avoided original Rockwell principle to bring.
In order to make measuring accuracy more accurate, can receive the method for utilizing multimetering, through the measurement point of 5 settings, guarantee drill pipe sub when measurement is affected, still can guarantee to measure accurately through other measurement points.
In order to improve detection efficiency; Reduce the technological process of original polishing hardness groove station; Can guarantee that the accuracy of hardness number will compare through the tested for hardness value of grand rockwell hardness testing method and the hardness number behind the polishing plane through the surface configuration penalty method; Through the mass data experiment, drawn the hardness offset of different size joint, as shown in table 1.
The hardness offset of table 1 different size joint
| The sample model | Sample diameter/mm | Offset/HEW |
| 5-1/2FH | 190.5 | 5.3 |
| NC50 | 168.3 | 7.9 |
| NC31 | 110.0 | 14.2 |
Can reduce by a hardness groove polishing station through surperficial penalty method, under the situation that guarantees accuracy of measurement, reach the purpose of enhancing productivity.Through investigation, the operational efficiency of a whole set of robotization hardness measuring method domestic main testing efficiency at present improves nearly 1 times.
Claims (4)
1. hardness pick-up unit; The support (1) that comprises vertical placement; The upper end of said support (1) is fixed with hydraulic cylinder (2), and said lower end of going up hydraulic cylinder (2) is provided with the pressure head (3) that freely stretches, and the below of pressure head (3) is provided with supporting seat (4); It is characterized in that: the free end of said pressure head (3) is conical tip, is provided with protective sleeve (8) around the pressure head (3).
2. a kind of hardness pick-up unit according to claim 1 is characterized in that: the pipe of said protective sleeve (8) for moving freely vertically, said pressure head (3) is positioned at the center of pipe.
3. a kind of hardness pick-up unit according to claim 1 is characterized in that: the middle part of said support (1) is provided with host computer (6), and said host computer (6) is connected with protective sleeve (8) with pressure head (3) through sensor.
4. a kind of hardness pick-up unit according to claim 1 is characterized in that: the below of said supporting seat (4) is provided with down hydraulic cylinder (5), and the said hydraulic cylinder (2) of going up is connected with external hydraulic station (7) with following hydraulic cylinder (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220090225 CN202442930U (en) | 2012-03-12 | 2012-03-12 | Hardness detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220090225 CN202442930U (en) | 2012-03-12 | 2012-03-12 | Hardness detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202442930U true CN202442930U (en) | 2012-09-19 |
Family
ID=46824374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220090225 Expired - Fee Related CN202442930U (en) | 2012-03-12 | 2012-03-12 | Hardness detecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202442930U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104316397A (en) * | 2014-11-06 | 2015-01-28 | 莱州华银试验仪器有限公司 | Bistable-state direct-driven loading and unloading unit for main shaft of hardness tester |
| CN105699227A (en) * | 2016-02-18 | 2016-06-22 | 苏州莱测检测科技有限公司 | Portable hardness meter |
| CN110530747A (en) * | 2019-09-01 | 2019-12-03 | 横店集团英洛华电气有限公司 | Bulb surface hardness detecting tool |
| CN112414833A (en) * | 2020-11-20 | 2021-02-26 | 浙江工业大学 | Reference needle type indentation depth measuring device suitable for portable indentation instrument |
-
2012
- 2012-03-12 CN CN 201220090225 patent/CN202442930U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104316397A (en) * | 2014-11-06 | 2015-01-28 | 莱州华银试验仪器有限公司 | Bistable-state direct-driven loading and unloading unit for main shaft of hardness tester |
| CN104316397B (en) * | 2014-11-06 | 2016-08-24 | 莱州华银试验仪器有限公司 | Bistable state direct-drive type durometer main shaft adds off-load unit |
| CN105699227A (en) * | 2016-02-18 | 2016-06-22 | 苏州莱测检测科技有限公司 | Portable hardness meter |
| CN110530747A (en) * | 2019-09-01 | 2019-12-03 | 横店集团英洛华电气有限公司 | Bulb surface hardness detecting tool |
| CN112414833A (en) * | 2020-11-20 | 2021-02-26 | 浙江工业大学 | Reference needle type indentation depth measuring device suitable for portable indentation instrument |
| CN112414833B (en) * | 2020-11-20 | 2021-08-03 | 浙江工业大学 | Reference needle type indentation depth measuring device suitable for portable indentation instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120919 Termination date: 20180312 |