CN214224836U - A Rockwell hardness standard machine - Google Patents
A Rockwell hardness standard machine Download PDFInfo
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- CN214224836U CN214224836U CN202120035035.4U CN202120035035U CN214224836U CN 214224836 U CN214224836 U CN 214224836U CN 202120035035 U CN202120035035 U CN 202120035035U CN 214224836 U CN214224836 U CN 214224836U
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- 230000005540 biological transmission Effects 0.000 claims abstract description 27
- 230000007246 mechanism Effects 0.000 claims abstract description 10
- 238000012360 testing method Methods 0.000 claims description 13
- 238000007542 hardness measurement Methods 0.000 claims description 5
- 238000007373 indentation Methods 0.000 description 21
- 239000003921 oil Substances 0.000 description 15
- 238000000034 method Methods 0.000 description 8
- 238000011068 loading method Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000013101 initial test Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
本实用新型涉及一种洛氏硬度标准机，包括机架和压头装置，机架包括机架台板，机架台板上固定有左右间隔布置的左侧机架导向柱和右侧机架导向柱，压头装置包括移动块，移动块包括导向移动装配于左侧机架导向柱和右侧机架导向柱上的升降横梁，压头装置还包括与升降横梁中部传力配合的压头，升降横梁与压头的传力路径上设置有测力传感器，机架台板的左右两侧还转动装配有左侧传动丝杠和右侧传动丝杠，左侧传动丝杠与升降横梁的左端螺纹配合，右侧传动丝杠与升降横梁的右端螺纹配合，电机动力机构与左侧传动丝杠、右侧传动丝杠传动连接以实现驱动升降横梁上下移动。
The utility model relates to a Rockwell hardness standard machine, which comprises a frame and an indenter device. The frame comprises a frame platen, and the left-side frame guide column and the right-side frame are fixedly arranged at left and right intervals on the frame platen. The guide column, the indenter device includes a moving block, and the moving block includes a lifting beam that is guided and moved on the left frame guide column and the right frame guide column, and the indenter device also includes a force transmission head in the middle of the lifting beam. , A load cell is arranged on the force transmission path between the lifting beam and the pressure head, and the left and right driving screws on the left and right sides of the frame platen are also rotated and assembled. The left end thread is matched, the right drive screw is matched with the right end thread of the lift beam, and the motor power mechanism is connected with the left drive screw and the right drive screw to drive the lift beam to move up and down.
Description
Technical Field
The utility model relates to a rockwell hardness standard machine in the hardness measurement calibration field.
Background
The Rockwell hardness is an index for determining a hardness value by an indentation deformation depth, and the basic measurement principle is that, under a specified condition, a Rockwell hardness indenter is operated in the following steps, that is, in the first step, at an initial test pressure F1Next, a Rockwell hardness indenter is pressed into the surface of the sample to produce an indentation, and then the test pressure F is increased2The indentation depth of the indenter into the sample is increased and subsequently the pressure F is removed2Maintaining the pressure F1In this case, the indentation generates a certain degree of springback, and the difference in height between the indentation and the initial indentation is referred to as indentation residual depth, which represents the hardness of rockwell. The standard rockwell hardness tester is a rockwell hardness tester for calibrating rockwell hardness standard block test pieces, and can also directly measure hardness of common test pieces.
In the prior art that is more traditional, adopt the weight loading to the loading mode of pressure head, for example produce preliminary test pressure F through the weight of certain quality1Then the test pressure F is increased by increasing the number of weights2Then, the newly added weight is subtracted, and finally the initial test pressure F is maintained1Under the action of the pressureThe residual depth of the scar. In the figure, item 1 represents a specimen pressed by an indenter, and item 2 represents an indenter pressure of F1Initial indentation depth was generated, item 3 indicates indenter pressure F2The deepest indentation depth produced, item 4 indicates the indenter pressure is represented by F2Is changed into F1After that, the depth of the indentation after springback, the height difference between item 4 and item 2 is called the residual depth of the indentation. The manual weight loading mode is tested, so that the Rockwell hardness measurement completely accords with the corresponding measurement mechanism, and the method has the characteristic of accurate measurement result. However, the manual weight loading method has the disadvantages of low automation degree, high labor intensity, low detection efficiency and the like.
Disclosure of Invention
An object of the utility model is to provide a rockwell hardness standard machine to realize the technical problem that the loading force adjustment is wasted time and energy through manual increase and decrease weight among the solution prior art.
In order to solve the technical problem, the technical scheme of the utility model as follows:
the utility model provides a rockwell hardness standard machine, which comprises a frame and a pressure head device, the frame includes the frame platen, left side frame guide post and right side frame guide post of interval arrangement about being fixed with on the frame platen, the pressure head device includes the movable block, the movable block includes the lifting beam of direction removal assembly on left side frame guide post and right side frame guide post, the pressure head device still includes with lifting beam middle part biography power complex pressure head, be provided with force cell sensor on the biography power route of lifting beam and pressure head, the left and right sides of frame platen still rotates and is equipped with left side drive screw and right side drive screw, left side drive screw and lifting beam's left end screw-thread fit, right side drive screw and lifting beam's right-hand member screw-thread fit, motor power unit and left side drive screw, right side drive screw transmission is connected in order to realize that drive lifting beam reciprocates.
The left side of left side drive screw is covered with the left side guard shield, the outside of right side drive screw is covered with the right side guard shield, the opening of left side guard shield is towards the right side, the opening of right side guard shield is towards the left side, the both ends of lifting beam then pass from the opening that corresponds, be provided with left side ripple folded sheet between the left end of lifting beam and the left side guard shield upper end, be provided with right side ripple folded sheet between the left end of lifting beam and the frame platen, between the right-hand member of lifting beam and the left side guard shield upper end, between the right-hand member of lifting beam and the frame platen.
The motor power mechanism is arranged on the lower side of the frame bedplate.
And a cross sliding table for placing a corresponding test piece is arranged on the lower side of the pressure head on the rack platen.
The utility model has the advantages that: left side drive screw, right side drive screw and lifting beam's screw-thread fit, make lifting beam form a "screw" structure, at left side drive screw, when right side drive screw rotated, lifting beam can the rebound and the downstream, during the use, motor power unit drive left side drive screw and the synchronous syntropy rotation of right side drive screw, lifting beam realizes the pressure head loading through the downstream, realize the pressure head uninstallation through the rebound, lifting beam wholly adopts both ends power transmission structure, the power transmission process is reliable and stable.
Drawings
FIG. 1 is a schematic diagram of Rockwell hardness measurement in the background of the invention;
FIG. 2 is a schematic structural diagram of one embodiment of the present invention;
fig. 3 is a schematic view of the mounting block and the press head base in fig. 2.
Detailed Description
The embodiment of the Rockwell hardness standard machine of the utility model is shown in figures 2-3:
the automatic pressure head device comprises a frame, a motor power mechanism and a pressure head device, wherein the frame comprises a frame support leg 11 and a frame platen 12 fixed on the frame support leg, a left frame guide post 26 and a right frame guide post 14 are fixed at the upper end of the frame platen, a fixed cross beam 24 is fixed at the upper end of the left frame guide post 26 and the upper end of the right frame guide post 14, the pressure head device comprises a moving block capable of moving up and down under the driving of the motor power mechanism, the moving block comprises a lifting cross beam 21 which is guided to move and assembled on the left frame guide post and the right frame guide post, and the moving block further comprises an installation block 38 fixed at the lower end of the lifting cross beam.
The left side and the right side of the rack are also rotatably provided with a left side transmission screw 27 and a right side transmission screw 13, the left side transmission screw 27 is in threaded fit with the left end of the lifting cross beam 21, and the right side transmission screw 13 is in threaded fit with the right end of the lifting cross beam 21, so that the lifting cross beam forms a screw which cannot rotate but can only move up and down. Motor power unit is including being fixed in the gear motor 8 of frame platen downside, gear motor has the power output shaft that the axis extends along upper and lower direction, the last coaxial line of power output shaft is fixed with driving gear 7, the downside coaxial line in the frame platen on the left side drive screw is fixed with left side lead screw shaft gear 5, the downside coaxial line in the support platen is fixed with right side lead screw shaft gear 10 on the right side drive screw 13, left side lead screw shaft gear 5 is connected with driving gear 7 transmission through left side drive gear 6, right side lead screw shaft gear 10 is connected with driving gear 7 transmission through right side drive gear 9, like this under the drive of driving gear, left side lead screw shaft gear and right side lead screw shaft gear can synchronous syntropy rotate. In addition, in order to avoid dust from entering the left and right transmission screws to affect the transmission precision, the left side transmission screw is covered with a left side shield 25, the right side transmission screw is covered with a right side shield 15, the opening of the left side shield faces to the right, the opening of the right side shield faces to the left, the two ends of the lifting beam 21 penetrate through the corresponding openings, a left corrugated folding plate 23 is arranged between the left end of the lifting beam and the upper end of the left side shield, a left corrugated folding plate 23 is arranged between the left end of the lifting beam and the frame bedplate, a right corrugated folding plate 22 is arranged between the right end of the lifting beam and the upper end of the left side shield, and a right corrugated folding plate 22 is arranged between the right end of the lifting beam and the frame bedplate, the opening of the corresponding shield is shielded by the left corrugated folding plate and the right corrugated folding plate, so as to prevent the field dust from entering the corresponding shield, and simultaneously, the lifting action of the lifting beam can not be affected, when the lifting beam moves upwards, the folding and shrinking of the ripple folded sheet of upside, the ripple folded sheet of downside expandes, and when the lift crossbeam moved down, the ripple folded sheet of upside expandes, and the folding and shrinking of ripple folded sheet of downside.
The mounting block 38 is provided with a hydraulic chamber 35 with a downward opening, a piston plate 36 is movably guided in the hydraulic chamber 35, and the lower end of the mounting block is provided with a piston plate stopping and turning edge 37 for stopping and matching with the piston plate to limit the downward movement of the piston plate. The pressure head 17 is installed on the pressure head seat 20, the left side and the right side of the installation block are fixedly provided with guide rods 29 with axes extending along the vertical direction, the pressure head seat 20 is movably assembled on the guide rods in a guiding mode, the pressure head 17 is fixed at the lower end of the pressure head seat 20, the upper end of the pressure head seat 20 is provided with a force transducer 30, a piston plate 36 is connected with the force transducer through a force transmission spring 18 with axes extending along the vertical direction, the upper end of the specific force transmission spring is fixed on the piston plate, and the lower end of the force transmission spring is fixed on the force transducer. The side of the pressure head base is provided with a laser displacement sensor 28.
Still be equipped with cushion chamber 34 in the installation piece, be provided with first oil duct 33 between the upper end of cushion chamber 34 and the hydraulic pressure chamber 35, be provided with second oil duct 31 between the lower extreme of cushion chamber 34 and the hydraulic pressure chamber 35, still be provided with on the installation piece 38 and be used for communicateing cushion chamber and outside atmospheric atmosphere passageway 32, be provided with first oil duct ooff valve and first oil duct relief valve on the first oil duct 33, be provided with the second oil duct ooff valve on the second oil duct 31, be provided with the atmospheric air passageway ooff valve on the atmospheric air passageway. In the present embodiment, the first oil passage switching valve, the second oil passage switching valve, and the atmosphere passage switching valve are all solenoid valves.
The frame platen is provided with cross sliding table 16 on the lower side of the pressure head, the transverse movement of the cross sliding table is driven by a transverse motor, the longitudinal movement of the cross sliding table is driven by a longitudinal motor, a test piece 19 is arranged on the cross sliding table 16 during use, the cross sliding table can drive the test piece to move left and right, and therefore the pressing position of the pressure head on the test piece is changed, and indentation positions are changed to obtain multiple sets of data.
In the using process of the invention, a motor power mechanism drives a lifting cross beam to move downwards through a left screw shaft and a right screw shaft, the lifting cross beam and an installation block transmit force to a pressure head seat through a force transmission spring, a pressure head applies pressure to a test piece until the reading of a force measuring sensor is F1At the moment, indentation is generated, the displacement value measured by the laser displacement sensor is the zero displacement value, and then the motor power mechanism continues to drive the lifting beam 21 and the lifting beamThe mounting block 38 moves downwards, the force transmission spring 18 is compressed, and the acting force of the pressure head on the test piece is gradually increased to F2And recording the reading of the laser displacement sensor once, wherein the first oil duct switch valve and the second oil duct switch valve are both in a closed state in the above process. Then, the first oil duct switch valve is opened, and the motor power mechanism drives the lifting cross beam to move upwards until the acting force of the pressure head on the test piece is restored to F1Keeping a period of time, this in-process is under the effect of biography power spring, and the pressure head exerts the effort to the indentation bottom always, and is unanimous with the required measurement principle of rockwell hardness, and simultaneously at the in-process that the indentation kick-backed, the pressure head can upwards move and exert upward effort to transmission spring, and transmission spring exerts the effort to the piston plate, and the liquid in the hydraulic pressure intracavity is arranged the cushion chamber through first oil duct to realize the pressure release, transmission spring is not compressed, guarantees that the indentation rebounds the in-process, and the pressure head maintains F throughout to the pressure of indentation1And finally measuring the residual depth of the indentation. In the final indentation rebound process, the invention can ensure that the pressure head always keeps the initial pressure F on the bottom of the indentation1The method is consistent with the measurement principle of the Rockwell hardness, so that the residual depth of the indentation can be accurately measured, and the Rockwell hardness value can be accurately obtained. After the measurement is finished, the motor power mechanism drives the lifting beam to move upwards, the second oil duct switch valve and the atmospheric channel switch valve are opened, the lifting beam has a downward movement trend under the action of the gravity of the press head seat, the press head seat drives the piston plate to move downwards through the force transmission spring, and hydraulic oil in the buffer cavity is pumped back to the hydraulic cavity through the second oil duct. In other embodiments of the present invention, the load cell may also be disposed on the underside of the pressure head base, with the load cell being located between the pressure head base and the pressure head.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (4)
1. The utility model provides a rockwell hardness standard machine, includes frame and indenter device, its characterized in that: the frame includes the frame platen, left side frame guide post and right side frame guide post that interval arrangement about being fixed with on the frame platen, pressure head device includes the movable block, the movable block includes the direction and removes the lifting beam of assembling on left side frame guide post and right side frame guide post, pressure head device still include with lifting beam middle part biography power complex pressure head, be provided with force cell sensor on the biography power route of lifting beam and pressure head, the left and right sides of frame platen still rotates and is equipped with left side drive screw and right side transmission lead screw, left side drive screw and lifting beam's left end screw-thread fit, right side drive screw and lifting beam's right-hand member screw-thread fit, motor power unit and left side drive screw, right side transmission lead screw transmission is connected in order to realize driving lifting beam and reciprocates.
2. The rockwell hardness testing machine according to claim 1, wherein: the left side of left side drive screw is covered with the left side guard shield, the outside of right side drive screw is covered with the right side guard shield, the opening of left side guard shield is towards the right side, the opening of right side guard shield is towards the left side, the both ends of lifting beam then pass from the opening that corresponds, be provided with left side ripple folded sheet between the left end of lifting beam and the left side guard shield upper end, be provided with right side ripple folded sheet between the left end of lifting beam and the frame platen, between the right-hand member of lifting beam and the left side guard shield upper end, between the right-hand member of lifting beam and the frame platen.
3. The rockwell hardness testing machine according to claim 1, wherein: the motor power mechanism is arranged on the lower side of the frame bedplate.
4. The Rockwell hardness Standard machine according to any one of claims 1 to 3, wherein: and a cross sliding table for placing a corresponding test piece is arranged on the lower side of the pressure head on the rack platen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120035035.4U CN214224836U (en) | 2021-01-07 | 2021-01-07 | A Rockwell hardness standard machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120035035.4U CN214224836U (en) | 2021-01-07 | 2021-01-07 | A Rockwell hardness standard machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214224836U true CN214224836U (en) | 2021-09-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120035035.4U Active CN214224836U (en) | 2021-01-07 | 2021-01-07 | A Rockwell hardness standard machine |
Country Status (1)
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|---|---|
| CN (1) | CN214224836U (en) |
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2021
- 2021-01-07 CN CN202120035035.4U patent/CN214224836U/en active Active
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