CN103017625B - A kind of overlength depth measurement snap gauge - Google Patents
A kind of overlength depth measurement snap gauge Download PDFInfo
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- CN103017625B CN103017625B CN201210540892.5A CN201210540892A CN103017625B CN 103017625 B CN103017625 B CN 103017625B CN 201210540892 A CN201210540892 A CN 201210540892A CN 103017625 B CN103017625 B CN 103017625B
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Abstract
A kind of snap gauge with overlength depth measurement, comprise the upper handle hinged by rotating shaft and lower handle, and be arranged on respectively the gauge head up and down of upper handle and lower handle head, it is characterized in that, also comprise table pawl gauge block and the card table with chaining pin, wherein: described table pawl gauge block is arranged on lower handle, its top is the curved surface that has specific curves track and have certain width; Described card table is arranged on upper handle, and its chaining pin contacts with the curved surface on described table pawl gauge block top, and can upper and lower handle in relative rotation in process on this curved surface the track along described curve necessarily move. The present invention has overcome the limited problem of general snap gauge depth measurement, can meet the wall thickness testing requirement to darker die cavity foundry goods, has good certainty of measurement simultaneously, has engineering using value.
Description
Technical field
The present invention relates to a kind of measurer, especially a kind of snap gauge with overlength depth measurement.
Background technology
Though index zone off-balancesheet calliper can be measured conventional products thickness, cannot measure and haveThe casting section thickness in darker chamber, has brought the measurement difficult problem of darker die cavity cast product wall thickness thus.Therefore the wall thickness that, needs a kind of overlength depth measurement snap gauge to realize darker die cavity foundry goods detects.
Summary of the invention
The object of this invention is to provide a kind of snap gauge with overlength depth measurement, outside overcoming generallyThe problem that calliper depth measurement is limited, meets the wall thickness testing requirement to darker die cavity foundry goods.
According to above-mentioned purpose, the invention provides a kind of snap gauge with overlength depth measurement, compriseBy the hinged upper handle of rotating shaft and lower handle, and be arranged on respectively upper handle and assistant's buttonThe gauge head up and down of portion, is characterized in that, also comprises table pawl gauge block and the card table with chaining pin, wherein:Described table pawl gauge block is arranged on lower handle, and its top is for having specific curves track and having oneThe curved surface of fixed width degree; Described card table is arranged on upper handle, its chaining pin and described table pawl gauge block topThe curved surface contact of end, and can upper and lower handle in relative rotation in process on this curved surface edgeThe track of described curve necessarily moves.
Preferably, the curvilinear path of described table pawl gauge block top curved surface should have following characteristics:In the plane of card table chaining pin head movement locus line place, set up plane right-angle coordinate, with this plane withThe intersection point of shaft centerline is the origin of coordinates, under calliper between the measurement point of gauge head and this center lineVertical range be D, taking the straight line that is parallel to this air line distance as X-axis, every bit on curveCoordinate figure (X in this coordinate systemB，YB) all meet following formula, and in formula, each number isAbsolute value:
XB＝cos(β-α)·d+2sinα·sin(α/2)·D/S，
YB＝sin(β-α)·d+2cosα·sin(α/2)·D/S；
Wherein, the subtended angle that α is calliper; Card table chaining pin head when d is the interlock of measuring point up and down of calliperTo the distance of the origin of coordinates, β is that now the line between chaining pin head and the origin of coordinates and X-axis be justTo between angle, and β is the arbitrary value between 30 °-90 °, specifically upper and lower by calliperThe determining positions at chaining pin head place when gauge head interlock and card table instruction zero-bit; S represents the table of card tableRatio between dish indicated value and the travel displacement of chaining pin. Wherein, the optimal proportion of d and D is:D＝5d。
Wherein, the optimum valuing range of D is: 150mm≤D≤550mm.
Further, the jaw of upper handle and lower handle is preferably designed as asymmetrical shape, so thatDeep enough some the special die cavity foundry goods of gauge head energy, for example certain model engine in calliper are turnedThe long and narrow foundry goods inside cavity of section, inducer.
The present invention has overcome the limited problem of general snap gauge depth measurement, can meet darker die cavityThe wall thickness testing requirement of foundry goods has good certainty of measurement simultaneously, has engineering using value.The wall thickness that this snap gauge can be realized under maximum 500mm fathoms detects, simultaneously certainty of measurementCan be controlled in ± 0.05mm.
Brief description of the drawings
Fig. 1 is schematic diagram when upper and lower gauge head interlock in the embodiment of the present invention 1;
Fig. 2 is the schematic diagram of the snap gauge in Fig. 1 while opening α angle;
Fig. 3 is the partial enlarged drawing of Fig. 2;
Fig. 4 is the schematic diagram of another embodiment of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in detail.
As shown in Figure 1, in most preferred embodiment of the present invention, overlength depth measurement snap gauge comprises logicalCross the hinged upper handle of rotating shaft and lower handle, and be arranged on respectively upper handle and lower handle headGauge head up and down, between upper lower handle, be connected with spring; Also comprise table pawl gauge block and with chaining pinCard table, wherein: table pawl gauge block is arranged on lower handle, and its top is for having specific curves trackAnd there is the curved surface of certain width; Card table is arranged on upper handle, its chaining pin head and table pawl gauge blockThe curved surface contact on top, and can upper and lower handle in relative rotation in process on this curved surfaceMove along the curvilinear path of setting. In measurement, this device can be regarded as to center line around the shaft turnsMoving lever transmission mechanism, finally reads measured value by the dial gauge being arranged on measuring appliance.
The upper and lower surface that snap gauge blocks wall thickness to be measured district by upper and lower gauge head is measured, thisTime the chord length of opening between measurement mechanism upper and lower gauge head can be similar to think to be exactly wall thickness value to be measured. ShouldChord length is delivered to card meter reading end after relation transformation by a certain percentage. For example the dial plate of card table refers toThe travel displacement proportionate relationship of indicating value and chaining pin is assumed to be 5: 1 (being S=5), and this just meansWall thickness value to be measured is delivered to after reading end, and the shift value of chaining pin is to treat 1/5 of measured value, and card tableDial plate indicated value is amplified reduction by the shift value of chaining pin with 5 times again, thereby finally indicates to be measuredWall thickness value.
Card table can be selected dial gauge. Card table chaining pin head and table pawl gauge block Surface Contact, and at table pawlGauge block surface guide slide displacement occurs, and the displacement of chaining pin depends on and shows pawl gauge blockCurved surface track. So make measuring junction chord length to be measured and card table chaining pin displacement in strict accordance with necessarilyBe related to motion change than row, must dependence table pawl gauge block on specific curved surface track realize, because ofThis need to obtain the mathematic(al) representation of table pawl gauge block curved surface, also i.e. card table chaining pin head of this expression formulaMovement Locus Equation.
In conjunction with Fig. 1 and Fig. 2, with reference to the layout enlarged drawing of figure 3, in the present invention, described tableThe curvilinear path of pawl gauge block top curved surface has following characteristics: at card table chaining pin head movement locus lineIn the plane of place, set up plane right-angle coordinate, taking the intersection point of this plane and shaft centerline as seatMark initial point O, the vertical range under calliper between the measurement point of gauge head and this center line is D, withThe straight line that is parallel to this air line distance is X-axis, the coordinate of every bit in this coordinate system on curveValue (XB，YB) all meet following formula, and in formula, each number is absolute value:
XB＝cos(β-α)·d+2sinα·sin(α/2)·D/5(1)
YB＝sin(β-α)·d+2cosα·sin(α/2)·D/5(2)
Wherein, the subtended angle that α is calliper; Card table chaining pin head when d is the interlock of measuring point up and down of calliperTo the distance of the origin of coordinates, β is that now the line between chaining pin head and the origin of coordinates and X-axis be justTo between angle, and β is the arbitrary value between 30 °-90 °, specifically upper and lower by calliperThe determining positions at chaining pin head place when gauge head interlock and card table instruction zero-bit.
In formula (1), (2), except folding angle α is variable, other values are known constant. WillDifferent folding angle α substitution formulas 12,13, can calculate the essence that corresponding with it B is orderedReally coordinate figure (XB，YB), if a series of B point obtaining is carried out curve fitting,Can obtain the movement locus of chaining pin head, namely show pawl gauge block curved surface trajectory.
Obviously, in certain coordinate span, more for the B point quantity of curve,The table pawl gauge block curved surface track that matching obtains will be more accurate, and final certainty of measurement will be higher.
Consider that table pawl gauge block can show chaining pin with card sliding friction occurs continually, in order to ensure cardUse durability degree and the Measurement sensibility of rule, finally selected Cr12MoV steel and be used as showing pawl amountThe manufacture material of piece.
In calliper is measured, require upper and lower handle should there is certain rigidity, to avoidThereby large strain has influence on accuracy and the stability of measured value; The jaw shape of handleDesign should meet and fathoms and for the requirement of accessibility of measuring die cavity; The Handheld Division of handleThe convenience of hand-held should be considered in position.
In order to ensure the running accuracy of rotating shaft between upper lower handle, can consider to adopt high accuracy thinType bearing part. In the present invention, the bearing that the code name of having selected Kazakhstan axle to produce is Z529, realBorder result of use is good.
In order to ensure the good fit of upper and lower gauge head and tested cast(ing) surface, consider gauge head simultaneouslyUse durability degree, gauge head uses Cr12MoV steel to be used as manufacturing material, in structure, has adoptedThe bulb design of Φ 1 comes as gauge head end.
Calliper used after a period of time, occurred unavoidably gauge head wearing and tearing and brought thus measure errorIncrease, the error amount in certain limit can look after and guide to make it to reduce and even disappear by calliper precisionRemove. The measurement error value causing when being worn and torn by gauge head cannot be decreased to by the instruction of calliper precisionIn the error range of 0.05mm time, should change gauge head and by technical requirement again adjustment calliper,To recover the due certainty of measurement of calliper.
In another embodiment of the present invention, there is the snap gauge of overlength depth measurement as shown in Figure 4.Snap gauge shown in its structure and Fig. 1 is similar, and major part is basic identical, but the length of handleLarger. And the jaw of upper handle and lower handle is asymmetrical shape, described upper measuring point distance is upperThe height of handle jaw is that lower measuring point is apart from the more than 3 times of lower handle jaw height.
In other embodiments of the invention, adopt different designs parameter designing, use above-mentioned tableTwo curve equation of pawl (1) and (2), designed the overlength depth measurement calliper of all size,The testing result of its main structure parameters and certainty of measurement is as shown in the table.
Table 1
Claims (9)
1. an overlength depth measurement snap gauge, comprises the upper handle hinged by rotating shaft and lower handle,And be arranged on respectively the gauge head up and down of upper handle and lower handle head, also comprise table pawl gauge block andWith the card table of chaining pin, wherein: described table pawl gauge block is arranged on lower handle, and its top is for havingSpecific curves track and there is the curved surface of certain width; Described card table is arranged on upper handle, itsChaining pin contacts with the curved surface on described table pawl gauge block top, and can relatively rotate at upper and lower handleProcess on this curved surface the track along described curve move, it is characterized in that described tableThe curvilinear path of pawl gauge block top curved surface has following characteristics: at card table chaining pin head movement locus lineIn the plane of place, set up plane right-angle coordinate, taking the intersection point of this plane and shaft centerline as seatMark initial point, the vertical range under calliper between the measurement point of gauge head and this center line is D, with warpZeroaxial horizontal direction is X-axis, the coordinate figure of every bit in this coordinate system on curve(XB，YB) all meet following formula, and in formula, each number is absolute value:
XB＝cos(β-α)·d+2sinα·sin(α/2)·D/S，
YB＝sin(β-α)·d+2cosα·sin(α/2)·D/S；
Wherein, the subtended angle that α is calliper; Card table chaining pin head when d is the interlock of measuring point up and down of calliperTo the distance of the origin of coordinates, when the interlock of measuring point up and down that β is calliper chaining pin head and the origin of coordinates itBetween line and the angle between X-axis forward, and β is the arbitrary value between 30 °-90 °,The determining positions at chaining pin head place during specifically by the upper and lower gauge head interlock of calliper and card table instruction zero-bit;S represents the ratio between dial plate indicated value and the travel displacement of chaining pin of card table.
2. snap gauge as claimed in claim 1, is characterized in that, in described formula,D＝5d。
3. snap gauge as claimed in claim 1, is characterized in that, 150mm≤D≤550mm.
4. snap gauge as claimed in claim 1, is characterized in that, described card table is percentageTable.
5. snap gauge as claimed in claim 1, is characterized in that, described rotating shaft is high-precisionSpend slim bearing.
6. snap gauge as claimed in claim 1, is characterized in that, described table pawl gauge block isWith Cr12MoV steel making.
7. snap gauge as claimed in claim 1, is characterized in that, described upper and lower gauge headIt is the bulb that is 1mm with the diameter of Cr12MoV steel making.
8. snap gauge as claimed in claim 1, is characterized in that, described upper handle with underThe jaw of handle is asymmetrical shape, and described upper measuring point is lower survey apart from the height of upper handle jawPoint is apart from the more than 3 times of lower handle jaw height.
9. snap gauge as claimed in claim 1, is characterized in that, described upper handle and underBetween handle, be provided with linking springs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210540892.5A CN103017625B (en) | 2012-12-14 | 2012-12-14 | A kind of overlength depth measurement snap gauge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210540892.5A CN103017625B (en) | 2012-12-14 | 2012-12-14 | A kind of overlength depth measurement snap gauge |
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| CN103017625A CN103017625A (en) | 2013-04-03 |
| CN103017625B true CN103017625B (en) | 2016-05-18 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103542783A (en) * | 2013-10-18 | 2014-01-29 | 北京动力机械研究所 | Dial snap gauge |
| CN104006717A (en) * | 2014-06-13 | 2014-08-27 | 湖北旭扬工贸有限公司 | Measuring tool special for measuring wall thickness of shell part |
| CN106969716A (en) * | 2017-03-29 | 2017-07-21 | 江苏亚威机床股份有限公司 | A kind of sheet thickness detection means |
| CN107702625A (en) * | 2017-10-18 | 2018-02-16 | 吴振明 | A kind of measurer for being easy to detect housing wall thickness |
| CN108050912A (en) * | 2017-12-01 | 2018-05-18 | 中国航发南方工业有限公司 | A kind of engine blade thickness detecting method |
| CN108627063B (en) * | 2018-07-18 | 2024-01-26 | 桂林市晶瑞传感技术有限公司 | Digital display caliper with adjustable measuring range |
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| EP0558194A1 (en) * | 1992-02-25 | 1993-09-01 | Robert Edward Best | Measuring calliper |
| CN2506972Y (en) * | 2001-11-08 | 2002-08-21 | 邢乐 | Test probe replaceable calipers with meter |
| EP1470792A1 (en) * | 2003-04-24 | 2004-10-27 | Centerpulse Orthopedics Ltd. | Distance measurement instrument for pedical screws |
| CN201074996Y (en) * | 2007-09-27 | 2008-06-18 | 贵州群建齿轮有限公司 | Dial gauge caliper for measuring inner hole groove diameter |
| CN201096489Y (en) * | 2008-02-02 | 2008-08-06 | 国家工程复合材料产品质量监督检验中心 | Multipurpose thickness meter |
| CN201285263Y (en) * | 2008-11-14 | 2009-08-05 | 齐齐哈尔二机床(集团)有限责任公司 | Internal groove caliper gauge |
| CN101949670A (en) * | 2010-08-20 | 2011-01-19 | 江苏凯特汽车部件有限公司 | Special measuring implement and method for measuring wall thickness of wheel rim of caliper-type car |
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2012
- 2012-12-14 CN CN201210540892.5A patent/CN103017625B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0558194A1 (en) * | 1992-02-25 | 1993-09-01 | Robert Edward Best | Measuring calliper |
| CN2506972Y (en) * | 2001-11-08 | 2002-08-21 | 邢乐 | Test probe replaceable calipers with meter |
| EP1470792A1 (en) * | 2003-04-24 | 2004-10-27 | Centerpulse Orthopedics Ltd. | Distance measurement instrument for pedical screws |
| CN201074996Y (en) * | 2007-09-27 | 2008-06-18 | 贵州群建齿轮有限公司 | Dial gauge caliper for measuring inner hole groove diameter |
| CN201096489Y (en) * | 2008-02-02 | 2008-08-06 | 国家工程复合材料产品质量监督检验中心 | Multipurpose thickness meter |
| CN201285263Y (en) * | 2008-11-14 | 2009-08-05 | 齐齐哈尔二机床(集团)有限责任公司 | Internal groove caliper gauge |
| CN101949670A (en) * | 2010-08-20 | 2011-01-19 | 江苏凯特汽车部件有限公司 | Special measuring implement and method for measuring wall thickness of wheel rim of caliper-type car |
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| CN103017625A (en) | 2013-04-03 |
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