CN113447198A - Thrust calibrating device of push-pull force testing machine - Google Patents
Thrust calibrating device of push-pull force testing machine Download PDFInfo
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- CN113447198A CN113447198A CN202110779606.XA CN202110779606A CN113447198A CN 113447198 A CN113447198 A CN 113447198A CN 202110779606 A CN202110779606 A CN 202110779606A CN 113447198 A CN113447198 A CN 113447198A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L25/00—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention provides a thrust calibration device of a push-pull force testing machine, which comprises: the device comprises a thrust stress shaft, a lever component, a supporting seat, a bottom plate, a rotating component and a weight hanging part, wherein the lever component is arranged on the supporting seat through the rotating component; the distance between the axis of the thrust stress shaft and the axis of the rotating assembly is smaller than the distance between the axis of the weight hanging piece and the axis of the rotating assembly; in the thrust correction process, after the weights are hung, the thrust sensor is controlled to descend, and horizontal thrust is applied to the thrust stress shaft to achieve thrust correction. The invention can ensure the consistency of the actual measurement precision and the calibration precision, and greatly reduces the overall dimension of the whole thrust calibration device through the optimized design of the two-stage lever, so that the thrust calibration device has smaller volume and is more convenient and faster.
Description
Technical Field
The invention relates to a thrust calibration device, in particular to a thrust calibration device of a push-pull force testing machine.
Background
In the semiconductor industry, push-pull force testing equipment is indispensable equipment, mainly detects the shearing strength of a chip, the shearing strength of a solder ball, the reliability of a bonding wire and the like through a mechanical sensor, the precision requirement of a thrust sensor during testing is very critical, therefore, the thrust sensors need to be calibrated frequently to ensure the precision of the sensor during testing, the precision of the sensor can be obtained more accurately only by simulating the action of an actually measured product during calibration of the thrust sensor, and the thrust sensor needs to be calibrated directly through weights, many thrust calibration devices on the market currently carry out calibration through other sensors or without simulating the action of the actually measured product, the precision of the operation during actual measurement and the precision during calibration have certain deviation, and the large-scale device is needed for realizing large-force calibration, it is difficult to calibrate with a weight.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a thrust calibration device which can ensure that the actual measurement precision is consistent with the calibration precision as much as possible and further reduce the device volume during large-force calibration and is suitable for a push-pull force testing machine.
In view of the above, the present invention provides a thrust calibration device for a push-pull force testing machine, comprising: the device comprises a thrust stress shaft, a lever component, a supporting seat, a bottom plate, a rotating component and a weight hanging part, wherein the lever component is arranged on the supporting seat through the rotating component; the distance between the axis of the thrust stress shaft and the axis of the rotating assembly is smaller than the distance between the axis of the weight hanging piece and the axis of the rotating assembly; in the thrust correction process, a weight for calibration is hung through the weight hanging part, then the thrust sensor is controlled to descend, and horizontal thrust is applied to the thrust stress shaft, so that the weight is lifted up to realize thrust correction.
The invention has the further improvement that the rotating assembly comprises a first rotating shaft and a first bearing, the first rotating shaft is sleeved in the first bearing, the lever assembly is rotatably connected with the supporting seat through the first rotating shaft and the first bearing, and the axis of the rotating assembly is the axis of the first rotating shaft.
The invention is further improved in that the lever assembly comprises a single-stage lever, one end of the single-stage lever, which is far away from the weight hanging part, is a first force arm, one end of the single-stage lever, which is close to the weight hanging part, is a second force arm, and the rotating assembly is arranged between the first force arm and the second force arm; the first force arm is located above the rotating assembly, and the thrust force bearing shaft is arranged on one side, close to the second force arm, of the top of the first force arm.
The lever assembly further comprises a counterweight arm and a first counterweight mechanism, the counterweight arm is arranged at one end of the first force arm far away from the second force arm, and the first counterweight mechanism is arranged at one end of the counterweight arm far away from the second force arm.
The invention is further improved in that the lever assembly comprises a first-stage lever, a second rotating shaft and a second bearing, the first-stage lever is rotatably connected with the supporting seat through the rotating assembly, the second-stage lever is rotatably connected with the supporting seat through the second rotating shaft and the second bearing, the weight hanging part is arranged at one end of the second-stage lever, and the first-stage lever is arranged at the other end of the second-stage lever.
The invention is further improved in that the thrust force bearing shaft is arranged above the rotating component and is arranged on the top of one end of the first-stage lever far away from the second-stage lever.
The invention further improves the structure that the structure also comprises a second counterweight mechanism, and the second counterweight mechanism is arranged at one end of the first-stage lever close to the second-stage lever.
The invention has the further improvement that the bottom of one end of the first-stage lever, which is close to the second-stage lever, is provided with a first notch, the top of one end of the second-stage lever, which is close to the first-stage lever, is provided with a second notch, and the first notch and the second notch are matched with each other; and a third bearing used for pressing the second-stage lever is arranged in the first notch.
The invention is further improved in that one end of the supporting seat far away from the first-stage lever is provided with a horizontal shaft, and the horizontal shaft is arranged below the second-stage lever and is arranged on one side of the second rotating shaft close to the weight hanging piece.
The invention has the further improvement that one end of the first-stage lever close to the second-stage lever is provided with a first weight adjusting hole, and the second-stage lever is uniformly provided with a row of second weight adjusting holes.
Compared with the prior art, the invention has the beneficial effects that: structural design through the optimization has realized the thrust calibrating device who hangs the weight, utilize the uniformity of calibration action and actual test product action, precision when reaching the precision of calibration and in-service use sensor test can not have the purpose of deviation, the uniformity of actual measurement precision and calibration precision has been guaranteed, on this basis, still through the optimal design of doublestage lever, and then whole thrust calibrating device's overall dimension has been reduced greatly, make thrust calibrating device's volume small and exquisite and convenient more.
Drawings
FIG. 1 is a schematic perspective view of an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of an embodiment of the present invention;
FIG. 3 is a schematic perspective view of another embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of another embodiment of the present invention;
FIG. 5 is a schematic side view of another embodiment of the present invention;
fig. 6 is a schematic top view of another embodiment of the present invention.
Detailed Description
Preferred embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
As shown in fig. 1 to 6, the present embodiment provides a thrust calibration device for a push-pull force testing machine, including: the device comprises a thrust stress shaft 2, a lever component, a supporting seat 3, a bottom plate 4, a rotating component and a weight hanging part 5, wherein the lever component is arranged on the supporting seat 3 through the rotating component, the supporting seat 3 is arranged on the bottom plate 4, the thrust stress shaft 2 is arranged at one end of the lever component, and the weight hanging part 5 is arranged at the other end of the lever component; the distance between the axis of the thrust stress shaft 2 and the axis of the rotating assembly is smaller than the distance between the axis of the weight hanging piece 5 and the axis of the rotating assembly; in the thrust correction process, a weight for calibration is hung through the weight hanging piece 5, then the thrust sensor is controlled to descend, and horizontal thrust is applied to the thrust stress shaft 2, so that the weight is lifted up to realize thrust correction.
It should be noted that, in this embodiment, the distance between the axial center of the thrust force receiving shaft 2 and the axial center of the rotating unit is preferably smaller than the distance between the axial center of the weight hanging member 5 and the axial center of the rotating unit, and such a design can realize large thrust calibration by a small mass weight; of course, in practical applications, the distance between the axis of the thrust force-receiving shaft 2 and the axis of the rotating assembly may be greater than or equal to the distance between the axis of the weight suspension member 5 and the axis of the rotating assembly.
The thrust force bearing shaft 2 is a force bearing shaft for providing a horizontal thrust force F1 when the thrust sensor 1 is tested, the lever assembly comprises a single-stage lever as shown in fig. 1 and 2 or a double-stage lever as shown in fig. 3 to 6, and the supporting seat 3 is used for supporting the lever assembly; the bottom plate 4 is an installation bottom plate of the supporting seat 3 and is used for installing the thrust calibration device into a push-pull force testing machine, and the rotating component is a rotating piece between the lever component and the supporting seat 3 and serves as a fulcrum of the lever component; the weight suspension member 5 is used for suspending a weight 18.
As shown in fig. 1 to 6, the rotating assembly of this embodiment includes a first rotating shaft 6 and a first bearing 7, the first rotating shaft 6 is sleeved in the first bearing 7, the lever assembly is rotatably connected to the supporting base 3 through the first rotating shaft 6 and the first bearing 7, and an axis of the rotating assembly is an axis of the first rotating shaft 6. The rotary connection between the lever assembly and the supporting seat 3 is preferably realized by the first rotating shaft 6 and the first bearing 7, so that the friction coefficient can be effectively reduced, the high-precision calibration is ensured, in addition, the lever force arm of the lever assembly adopts the axis to form the force arm, the fluctuation of the thrust during the calibration can be smaller, and the precision is high.
As shown in fig. 1 and fig. 2, the lever assembly in this example includes a single-stage lever, one end of the single-stage lever away from the weight hanging part 5 is a first force arm 8, the first force arm 8 refers to a force arm of the thrust force-bearing shaft 2, and the force arm of the thrust force-bearing shaft 2 is a distance L1 between the axial center of the thrust force-bearing shaft 2 and the axial center of the first rotating shaft 6; one end of the single-stage lever close to the weight hanging part 5 is a second force arm 9, the second force arm 9 refers to a force arm of the weight 18, and the force arm of the weight 18 is a distance L2 between the axis of the weight hanging part 5 and the axis of the first rotating shaft 6; the rotating component is arranged between the first force arm 8 and the second force arm 9; first arm of force 8 is located rotating assembly's top, thrust atress axle 2 set up in 8 tops of first arm of force are close to one side of second arm of force 9, are convenient for improve the convenient degree that thrust sensor 1 targetting in place when the test. Preferably, as shown in fig. 1 and fig. 2, in the design of the single-stage lever, a buffer gap is preferably arranged below the thrust stressed shaft 2, the buffer gap is a gap for realizing a buffer effect, and by the arrangement of the buffer gap, the thrust stressed shaft 2 can realize a protection effect through buffering when receiving a horizontal thrust, which is also convenient for improving the accuracy of calibration.
It is worth mentioning that the lever assembly in this example further comprises a counterweight arm 10 and a first counterweight mechanism 11, wherein the counterweight arm 10 is a member for realizing counterweight for avoiding imbalance due to the weight of the second force arm 9; the first counterweight mechanism 11 is used for realizing balance adjustment by adding weight, and the first counterweight mechanism 11 preferably comprises counterweight mechanisms in the form of screws or bolts and the like; the counterweight arm 10 is arranged at one end, far away from the second moment arm 9, of the first moment arm 8, and the first counterweight mechanism 11 is arranged at one end, far away from the second moment arm 9, of the counterweight arm 10. On the other hand, in this embodiment, the second arm 9 is also preferably provided with a weight adjusting hole, and the weight adjusting hole is preferably a hollow hole, because the length of the second arm 9 is long, the weight of the second arm can be reduced by the weight adjusting hole, so that the balance is facilitated, the number of the weight adjusting holes is multiple, and the multiple weight adjusting holes are uniformly distributed in the second arm 9. At this time, the two ends of the lever assembly in this embodiment are preferably provided with counterweight devices (i.e., the counterweight arm 10, the first counterweight mechanism 11, and the weights), so that the balance adjustment of the lever can be realized quickly, and the work efficiency of thrust calibration can be improved in an auxiliary manner.
In summary, as shown in fig. 1 and fig. 2, the thrust calibration device is implemented by using a single-stage lever principle and an optimized design of the overall structure of the device, and the calculation formula is as follows: l1 × F1= L2 × G, wherein L1 is a moment arm distance between the axial center of the thrust force-receiving shaft 2 and the axial center of the first rotating shaft 6, that is, a moment arm distance of the first moment arm 8; f1 is the horizontal thrust provided by the thrust sensor 1 during testing; l2 is the moment arm distance between the axle center of the weight suspension 5 and the axle center of the first rotation shaft 6, i.e. the moment arm distance of the second moment arm 9; g is the gravity of weight 18, and it can be seen through the formula that when L2 is greater than L1, the calibration of the thrust sensor with large thrust can be realized through the small-mass weight, and the design of the axis moment arm makes the fluctuation of the stress smaller during the calibration, and more effectively ensures the precision of the thrust calibration.
As shown in fig. 3 to 6, the lever assembly of this embodiment includes a first-stage lever 12, a second-stage lever 13, a second rotating shaft 14, and a second bearing 15, the first-stage lever 12 is rotatably connected to the supporting base 3 through the rotating assembly (i.e., the first rotating shaft 6 and the first bearing 7), the second-stage lever 13 is rotatably connected to the supporting base 3 through the second rotating shaft 14 and the second bearing 15, the weight hanging member 5 is disposed at one end of the second-stage lever 13, and the first-stage lever 12 is disposed at the other end of the second-stage lever 13.
In this embodiment, the axis of the first rotating shaft 6 is a fulcrum of the first-stage lever 12, the second rotating shaft 14 is a fulcrum of the second-stage lever 13, the force arms of the two-stage lever can rotate around the respective fulcrums, the third bearing 122 on the first-stage lever 12 falls on the second rotating shaft 14, and the weight of the first-stage lever 12 pressing the second-stage lever 13 is to balance the second-stage lever 13, that is, the weights at both ends of the fulcrum of the second-stage lever 13 are the same as a balance, so that when the thrust calibrating device is balanced, the gravity when the weight 18 is hung on directly reflects the horizontal thrust of the thrust-receiving shaft 2. Preferably, as shown in fig. 3 to 5, in the design of the two-stage lever, a buffer gap is also preferably provided on a side of the thrust force-receiving shaft 2 close to the second-stage lever 13, the buffer gap is a gap for achieving a buffer effect, and by the arrangement of the buffer gap, the thrust force-receiving shaft 2 can achieve a protection effect by buffering when receiving a horizontal thrust, which is also convenient for improving the accuracy of calibration.
It should be noted that, in this embodiment, the first-stage lever 12 and the second-stage lever 13 are respectively connected with the support base 3 by the rotation shaft and the bearing, so as to effectively reduce the friction coefficient and ensure the high-precision calibration, and the lever force arms of the lever assembly are formed by the axes, so that the fluctuation of the thrust during the calibration is smaller and the precision is high.
As shown in fig. 3 to 5, the thrust force-bearing shaft 2 is disposed above the rotating assembly and on the top of the first-stage lever 12 away from the second-stage lever 13, so as to improve the convenience of the thrust sensor 1 in place during testing; in this embodiment, it is also preferable to include a second counterweight mechanism 16, the second counterweight mechanism 16 is used for realizing balance adjustment by adding weight, the second counterweight mechanism 16 is preferably used for realizing balance adjustment by adding weight, and it should be noted that, in this embodiment, the length of the second-stage lever 13 is greater than that of the first-stage lever 12 when the first-stage lever 12 presses the weight of the second-stage lever 13 to balance the second-stage lever 13, so that, besides the balance adjustment of the second counterweight mechanism 16, the second counterweight mechanism 16 is also preferably arranged at one end of the first-stage lever 12 close to the second-stage lever 13, and can play a role of pressing the second-stage lever 13 well to avoid tilting the second-stage lever 13.
As shown in fig. 3, in this example, a first notch 121 is disposed at a bottom of one end of the first-stage lever 12 close to the second-stage lever 13, and the first notch 121 is preferably an arc notch; a second notch 131 is formed in the top of one end, close to the first-stage lever 12, of the second-stage lever 13, the second notch 131 is also preferably a circular-arc notch, and the first notch 121 and the second notch 131 are matched with each other, so that the two stages of levers are connected conveniently; the first notch 121 is provided with a third bearing 122 for pressing on the second-stage lever 13, and the third bearing 122 is arranged, so that when the first-stage lever 12 presses on the second-stage lever 13, the friction force is smaller, and the calibration precision is higher.
In this embodiment, a horizontal shaft 17 is disposed at an end of the supporting base 3 away from the first-stage lever 12, and the horizontal shaft 17 is disposed below the second-stage lever 13 and is disposed at a side of the second rotating shaft 14 close to the weight hanging member 5, so as to assist in supporting the second-stage lever 13, thereby ensuring stability and reliability of the product.
In this embodiment, a first weight adjusting hole 123 is formed at an end of the first-stage lever 12 close to the second-stage lever 13, the first weight adjusting hole 123 may preferably be a waist-shaped hole, the first weight adjusting hole 123 is formed at an end of the second counterweight mechanism 16 far from the second-stage lever 13, and is used for removing weight, and counterweight is realized by the size of the waist-shaped hole when calculating the weights at both sides; the second-stage lever 13 is uniformly provided with a row of second weight adjusting holes 132, the second weight adjusting holes 132 are preferably hollow holes, and the second-stage lever 13 is long, so that the weight of the second-stage lever can be reduced through the second weight adjusting holes 132, and balance is facilitated.
In summary, as shown in fig. 3 to fig. 6, the thrust calibration device is implemented by using the two-stage lever principle and the optimized design of the overall structure of the device, and the calculation formula is as follows: l1 × F1= L2' × F2, L3 × F2= L4 × G, wherein L1 is a moment arm distance between the axial center of the thrust receiving shaft 2 and the axial center of the first rotating shaft 6, and F1 is a horizontal thrust provided by the thrust sensor 1 during the test; l2' is the moment arm distance between the axis of the third bearing 122 and the axis of the first rotation shaft 6, and F2 is the vertical pressure of the third bearing 122 on the second-stage lever 13; l3 is the arm of force distance between the axle center of third bearing 122 and the axle center of second rotation axis 14, L4 is the arm of force distance between the axle center of second rotation axis 14 and the axle center of weight suspender 5, G is the gravity of weight 18, can find out through the formula, can obviously reduce the required distance of the arm of force through the design of two-stage lever, and then can realize the calibration of thrust sensor of big thrust through the little quality weight further, still through the design of the axle center arm of force, make the fluctuation of atress during the calibration littleer, guaranteed the precision of thrust calibration more effectively, the simple structure of this example is reasonable reliable, small.
The calibration process of this example, whether it is a single-stage lever or a double-stage lever, includes: step S1, hanging the weight 18 for calibration on the lever assembly; step S2, placing the thrust sensor 1 at the rear upper part of the thrust stress shaft 2, and in a suspended state, not contacting anything; step S3, inputting a calibration coefficient on a control interface, and then starting calibration; and step S4, judging whether the calibrated thrust sensor 1 is qualified or not by judging whether the lever assembly reaches balance or not. The calibration coefficient can be represented by a coefficient K, the calibration coefficient is self-defined and adjusted according to actual requirements, after calibration is started, the thrust sensor 1 automatically descends to contact with a bottom plane and then lifts a certain height, and then the thrust stress shaft 2 is horizontally pushed to lift the weight 18; during actual test, also be thrust sensor 1 hangs in the product (being equivalent to thrust atress axle 2) upper back, then begins the test, thrust sensor 1 automatic decline contacts the product base plate, then lifts up the height of settlement perpendicularly, then walks forward at the level and pushes away the solder ball in the place ahead, like the BGA ball on the PCB board, and then has realized calibration and actual test's uniformity.
To sum up, structural design through the optimization has realized the thrust calibrating device who hangs the weight, utilizes the uniformity of calibration action and actual test product action, and the precision that reaches the calibration can not have the purpose of deviation with the precision when the in-service use sensor tests, has guaranteed the uniformity of actual measurement precision and calibration precision, on this basis, still through the optimal design of doublestage lever, and then has reduced whole thrust calibrating device's overall dimension greatly for thrust calibrating device's volume is small and exquisite and convenient more.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. The utility model provides a thrust calibrating device of push-pull force test machine which characterized in that includes: the device comprises a thrust stress shaft, a lever component, a supporting seat, a bottom plate, a rotating component and a weight hanging part, wherein the lever component is arranged on the supporting seat through the rotating component; the distance between the axis of the thrust stress shaft and the axis of the rotating assembly is smaller than the distance between the axis of the weight hanging piece and the axis of the rotating assembly; in the thrust correction process, a weight for calibration is hung through the weight hanging part, then the thrust sensor is controlled to descend, and horizontal thrust is applied to the thrust stress shaft, so that the weight is lifted up to realize thrust correction.
2. The thrust calibration device of a push-pull force testing machine as claimed in claim 1, wherein said rotating assembly comprises a first rotating shaft and a first bearing, said first rotating shaft is sleeved in said first bearing, said lever assembly is rotatably connected to said supporting base through said first rotating shaft and said first bearing, and an axis of said rotating assembly is an axis of said first rotating shaft.
3. The thrust calibration device of a push-pull force testing machine according to claim 1 or 2, wherein the lever assembly comprises a single-stage lever, one end of the single-stage lever away from the weight suspension member is a first moment arm, one end of the single-stage lever close to the weight suspension member is a second moment arm, and the rotating assembly is disposed between the first moment arm and the second moment arm; the first force arm is located above the rotating assembly, and the thrust force bearing shaft is arranged on one side, close to the second force arm, of the top of the first force arm.
4. The thrust calibration device of a push-pull force testing machine as claimed in claim 3, wherein said lever assembly further comprises a counterweight arm disposed at an end of said first force arm remote from said second force arm, and a first counterweight mechanism disposed at an end of said counterweight arm remote from said second force arm.
5. The thrust calibration device of a push-pull force testing machine according to claim 1 or 2, wherein the lever assembly includes a first-stage lever, a second rotating shaft, and a second bearing, the first-stage lever is rotatably connected to the supporting base through the rotating assembly, the second-stage lever is rotatably connected to the supporting base through the second rotating shaft and the second bearing, the weight hanging member is disposed at one end of the second-stage lever, and the first-stage lever is disposed at the other end of the second-stage lever.
6. The thrust calibration device for a push-pull force testing machine as claimed in claim 5, wherein said thrust force-bearing shaft is disposed above said rotating member and at the top of the end of said first lever remote from said second lever.
7. The thrust calibration device for a push-pull force testing machine according to claim 5, further comprising a second weight mechanism disposed at an end of the first-stage lever near the second-stage lever.
8. The thrust calibration device of a push-pull force testing machine as claimed in claim 5, wherein a first notch is formed in a bottom portion of one end of the first-stage lever, which is close to the second-stage lever, and a second notch is formed in a top portion of one end of the second-stage lever, which is close to the first-stage lever, and the first notch and the second notch are matched with each other; and a third bearing used for pressing the second-stage lever is arranged in the first notch.
9. The thrust calibration device of a push-pull force testing machine as claimed in claim 5, wherein an end of the support base away from the first-stage lever is provided with a horizontal shaft, and the horizontal shaft is disposed below the second-stage lever and on a side of the second rotation shaft close to the weight hanging member.
10. The thrust calibration device of a push-pull force testing machine as claimed in claim 5, wherein a first weight adjustment hole is formed at one end of the first-stage lever close to the second-stage lever, and a row of second weight adjustment holes is uniformly formed in the second-stage lever.
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| CN202110779606.XA CN113447198B (en) | 2021-07-09 | 2021-07-09 | Thrust calibrating device of push-pull force testing machine |
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