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Detail Information of GB/T 17587.3-2017; GB/T17587.3-2017
Description (Translated English): Ball screws--Part 3: Acceptance conditions and acceptance tests
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J51
Classification of International Standard: 25.040.20
Word Count Estimation: 28,238
Date of Issue: 2017-09-29
Date of Implementation: 2018-04-01
Older Standard (superseded by this standard): GB/T 17587.3-1998
Drafting Organization: Jiangsu Ruian Te Machinery Group Co., Ltd., Beijing Machine Tool Research Institute, the State Machine Tool Quality Supervision and Inspection Center, Nanjing Technology Equipment Manufacturing Co., Ltd., Shaanxi Hanjiang Machine Tool Co., Ltd., Shandong Bottech Seiko Co., Ltd.
Administrative Organization: National Standard Committee on Metal Cutting Machine (SAC/TC 22)
Proposing organization: China Machinery Industry Federation
Issuing agency(ies): People's Republic of China General Administration of Quality Supervision, Inspection and Quarantine, China National Standardization Administration
GB/T 17587.3-2017
Ball screws - Part 3. Acceptance conditions and acceptance tests
ICS 25.040.20
J51
National Standards of People's Republic of China
Replacing GB/T 17587.3-1998
Ball screw pair
Part 3. acceptance conditions and acceptance tests
Balscrews-Part 3. Acceptance conditions and acceptance concepts
(ISO 3408-3..2006, MOD)
2017-09-29 Posted
2018-04-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Directory
Foreword Ⅲ
1 range 1
2 Normative references 1
3 Terms and definitions 1
4 Acceptance conditions and tolerances 1
4.1 Rating 1
4.2 Geometric accuracy test 2
4.2.1 Tolerance 2
4.2.2 Evaluation of the measurement chart 2
5 Acceptance test 3
5.1 Overview 3
5.2 Travel deviation and variation 6
5.3 Beating and position tolerance 11
5.4 Performance Testing 21
Appendix A (Normative) Supplementary Table 23
Foreword
GB/T 17587 "ball screw vice" is divided into the following five sections.
--- Part 1. Terms and symbols;
--- Part 2. Nominal diameter and nominal lead metric series;
--- Part 3. Acceptance conditions and acceptance testing;
--- Part 4. Static axial stiffness;
--- Part 5. Axial static load and dynamic load rating and service life.
This section GB/T 17587 Part 3.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This Part replaces GB/T 17587.3-1998 "Ball Screws Part 3. Acceptance Conditions and Acceptance Inspection", and GB/T 17587.3-
Compared to.1998, the main technical changes are as follows.
--- In the "4.1 classification", the.1998 version of the seven standard tolerance level to eight standard tolerance levels, an increase in Table 1 standard
Tolerance level 0. Whereafter the standard tolerance levels and inspection project tolerances are increased standard tolerance level 0
And the corresponding tolerance;
--- In "4.2.1 Tolerance", an increase of 0 level accuracy of the effective stroke lu travel variation tolerance vup formula;
---.1998 version of the "4.2.2 stroke deviation" to "5.1 Overview" in 5.1 to add a new table 2,1998 version of the table
2 to table 3;
--- The.1998 version of "4.2.3 Calculation of measurement drawings" be replaced by "4.2.2 Evaluation of measurement drawings", add "4.2.2.1 Overview", the original
4.2.3.1 and 4.2.3.2 to 4.2.2.2 and 4.2.2.3;
--- Figure 5.1 of 5.1 has been modified. The figure "allowable error =" to "allowable error ≤". Added missing table in original image
Show the stroke gauge graphics and guidelines 4;
--- The.1998 version of 5.1, 5.2 and 5.3, respectively, to 5.2, 5.3 and 5.4, and delete the.1998 version, the number of seized
Test items combined with a table of Table 3, Table 4 and Table 5, modified for each test item with a chart;
---.1998 version of the test items E1.1 and E1.2 within the "average stroke deviation e" is modified to test item E1.1 "average
Stroke deviations esa and e0a "and" average stroke deviations e0a "in test item E1.2;
--- Modify the test formula E1.2 allowance formula was modified;
--- In the test item E4 inspection instructions, an increase of "n in the diagram on behalf of the ball screw rotation relative to the ball nut
Number of turns. ";
--- The.1998 version of the test items E6, E7 and E8, respectively, to E6.1, E7.1 and E8.1; an increase of test items E6.2,
E7.2 and E8.2, and in the simplified diagram of E8.1, adding the indicator and the formula for evaluating the test results;
--- The test item E12 tolerance column, divided into lu ≤ 4000mm and lu> 4000mm two cases, an increase
lu> 4000mm tolerance, delete the.1998 version of the tolerance column on the lu> 3000mm Note, the.1998 version
Inspection instructions "ball screw vice (no seal at both ends)", amended to "ball screw pair (with or without seals at both ends)";
--- A table A.1 in Appendix A table and the "target travel tolerance" to "within the specified travel tolerance value";
--- Table A.3 in Appendix A has been modified to delete the note below the original table.
This section uses the redrafted Law Amendment uses ISO 3408-3..2006 "ball screw rod Part 3. Acceptance conditions and inspection
Test ".
This section compared with ISO 3408-3..2006 main technical differences and the reasons are as follows.
--- In ISO 3408-3..2006, the ball screw standard tolerance grade no level 2 and 4, taking into account the 2 and 4 ball
Screw pair is widely used in our country, so this part of the "4.1 grading" in Table 1, retained the GB/T 17587.1-1998
Approach to treatment, an increase of standard tolerance levels 2 and 4, after which all the standard tolerance levels and inspection project tolerance
Department, are increased by 2 and 4 standard tolerance levels and the corresponding tolerance;
--- In "4.2.1 Tolerance", with the same GB/T 17587.1-1998, an increase of 2 and 4 Accuracy Effective stroke lu Travel variation
Tolerance vup calculation formula;
--- The 5.1 Figure 2 made the following changes. The figure "allowable error =" to "allowable error ≤"; added that the trip measurement
The graph of the instrument, redirected its lead 4;
--- In the test item E4 inspection instructions, an increase of "n in the diagram on behalf of the ball screw rotation relative to the ball nut
Number of turns. ";
--- In the test item E5, with GB/T 17587.1-1998, in Note 1, an increase of "at this time l1 for the total ball screw length";
--- In test items E6.1, E7.1 and E8.1, as in GB/T 17587.1-1998, as in E6, E7 and E8, an additional table
Note. It is agreed to allow ball screw to be measured on the center hole. ";
--- In Appendix A, taking into account the nominal lead 4,6,8,12,16 and other ball screw has a wide range of applications, with GB/T 17587.1-
1998 Table A.2 adds the specifications for the nominal lead, changing the "lead" to "nominal lead" and "Ph" to "Ph0" in the table;
--- In Appendix A Table A.3, taking into account the changes in Table A.2 nominal lead specifications, for the table in Table A.3 carried out
modify.
This part of ISO 3408-3..2006 made the following editorial changes.
--- In the "4.2.1 Tolerance" and Appendix A Table A.1 table note, the effective stroke lu target stroke tolerance value ep to determine the method from not
Sub-level of accuracy of the description, respectively, amended to 0-level accuracy and by other levels of precision instructions;
--- The 4.2.3.3 of ISO 3408-3..2006 in Figure 3b) esa and e0a the following arrow marked place, re-injection between l'2 and l2
Centerline
--- Modify the symbol "v2πp" in test item E4 in 5.2 of ISO 3408-3..2006 to "v2π".
This part is proposed by China Machinery Industry Federation.
This part of the National Standardization Technical Committee metal cutting machine (SAC/TC22) centralized.
This section is drafted. Jiangsu Ryan Special Machinery Group Co., Ltd., Beijing Machine Tool Research Institute, National Machine Tool Quality Supervision and Inspection Center, South
Beijing Technology and Equipment Manufacturing Co., Ltd., Shaanxi Hanjiang Machine Tool Co., Ltd., Shandong Bot Precision Co., Ltd.
The main drafters of this section. Zhaojian Dong, Zhou Yue Kui, Zhang Wei, Wang Jikun, Chen Yan, Wang Aiqing, Huang Yuquan, Yan Beizheng, Zhu Jisheng.
This part of the standard replaces the previous editions are.
--- GB/T 17587.3-1998.
Ball screw pair
Part 3. acceptance conditions and acceptance tests
1 Scope
GB/T 17587 provisions of this part of the ball screw pair (see Figure 1) acceptance criteria, in particular, provides for each acceptance test project name
Weigh the corresponding tolerance value.
Note. The actual structure need not be consistent with the structure shown in Figure 1.
The required test items by the manufacturer and user consultation.
This section applies to machine tool ball screw pair, the other can also refer to use.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 1800.1-2009 Geometrical Product Specifications (GPS) - Limits and mating - Part 1. Tolerances, tolerances and mating bases
Basis (ISO 286-1. 1988, MOD)
GB/T 17421.1-1998 General rules of machine tool inspection - Part 1. Geometric accuracy of the machine under no load or finishing conditions (eqv
ISO 230-1..1996)
GB/T 17587.1-2017 ball screw pair - Part 1. Terms and symbols (ISO 3408-1..2006, MOD)
3 Terms and definitions
GB/T 17587.1-2017 defined terms and definitions apply to this document.
4 Acceptance conditions and tolerances
4.1 classification
Ball screw vice inspection, in accordance with GB/T 1800.1-2009 is divided into eight standard tolerance levels (see Table 1).
Table 1 standard tolerance level
Standard tolerance class 0
Standard tolerance class 1
Standard tolerance level 2 *
Standard tolerance class 3
Standard tolerance grade 4 *
Standard tolerance class 5
Standard tolerance class 7
Standard tolerance class 10
Increased accuracy and performance
Note. The standard tolerance grade with * in the table is the standard tolerance grade that is not preferred.
4.2 Geometric accuracy test
4.2.1 Tolerance
The target travel tolerance ep (Validation Items E1.1 and E1.2) within the effective travel lu, the ep accuracy of the 0 level accuracy is taken from the GB/T 1800.1-
2009 Table A.2 ep when the effective travel lu is greater than 500mm ep is calculated using the linear interpolation method; other precision level ep
Is taken from Table 1 of GB/T 1800.1-2009, when the effective stroke lu is greater than 3150mm, ep is also calculated by straight line interpolation
(See Appendix A, Table A.1).
Tolerance of the travel variation vup in the effective travel lu in micrometers (μm), calculated using the following formula.
--- Level 0. vup = 0.0035lu 2.4
--- Level 1. vup = 0.0045lu 4.6
--- Level 2. vup = 0.0064lu 6.5
--- Level 3. vup = 0.009lu 9.2
--- Level 4. vup = 0.0127lu 13
--- Level 5. vup = 0.018lu 18.4
Where lu is the length (lumin) and (lumax) corresponding to the starting (>) and ending (≤) of the measurement travel segment given in Table A.1, and then the following
The geometric mean calculated by the formula, in millimeters (mm).
lu = lumax × lumin
Beating tolerances and position tolerances are determined empirically.
4.2.2 Evaluation of measurement charts
4.2.2.1 Overview
In order to determine the actual average travel within the effective travel deviation, you can use mathematical or graphical method. Mathematical method accurate, and graphic method
Then, fast, daily calculations recommend this approximation method.
Note. The actual travel variation vup calculated mathematically may not be the smallest actual travel variation. Graphical approach to draw the smallest changes in the actual journey
momentum.
4.2.2.2 Mathematical method (least squares method)
The actual average travel deviation ea is given by.
ea = a bγ
Where.
a =
Σγ2i · Σei-Σγi · Σγi · ei
n · Σγ2i-Σγi · Σγi
b =
n · Σγi · ei-Σγi · Σei
n · Σγ2i-Σγi · Σγi
Where.
ea --- relative to the target or nominal itinerary of the actual average travel deviation;
γ --- ball nut relative to the ball screw rotation angle (also relative to the target stroke or nominal stroke);
γi --- the rotation angle of the i-th measurement point (also relative to the i-th measurement point of the target stroke or nominal stroke);
ei --- corresponding to the i-th measurement point of the target trip or nominal trip travel deviation;
n --- the number of measurement points.
4.2.2.3 Schematic [see Figure 3a) and Figure 3b)]
According to the actual deviation map to determine the actual average deviation is as follows.
a) Make tangents (l1, l2,) of two or more upper peak points through the actual stroke deviation curve,
Peak point of the tangent (l3,);
b) Determine the maximum deviation (e1, e2, e3,) parallel to the ordinate and select the minimum value from these values (e2 in the figure);
c) Draw a straight line parallel to the tangent of the corresponding peak by the minimum deviation (l'2 in the figure parallel to l2).
The actual average travel deviation ea is the centerline between the two parallel lines (l'2 and l2). Effective bandwidth within the trip, the above two levels
The line distance measured in the direction parallel to the ordinate e2, is the effective travel within the actual stroke variation vua.
5 acceptance test
5.1 Overview
Table 2 shows the standard tolerances for positioning (P type) or drive (T type) ball screw pairs.
Table 2 Positioning and transmission standard ball screw pair tolerances
Ball screw pair type standard tolerance class
Positioning (P type) 0-1-2-3-4-5
Transmission (T type) 0-1-2-3-4-5-7-10
The tests specified in Table 3 shall be performed according to the ball screw type [Positioning (P type) or Transmission (T type)].
The basic measurement principle shown in Figure 2.
Table 3 stroke deviation and variation test items
Travel deviation and variation for each reference length
Ball screw type
Positioning (P type) Transmission (T type)
Test items
Valid stroke lu travel compensation value C user-defined C = 0
Target travel tolerance ep E1.1 E1.2
Travel Stroke Allowable for Effective Travel vup E2 -
300mm travel allowable stroke variation v300p E3 E3
Allowable travel variation in 2πrad v2πp E4 -
The test values and tolerances refer to the displacement of the ball nut relative to the ball screw.
By the provisions of the special agreement on the inspection, the following methods can be used.
With a measuring ball and non-rotating ball screw raceway contact, tooth-by-tooth measurement, the minimum number of measurement intervals in Table A.2.
The travel variation v2π within 2πrad is determined by measuring the value of 9 o'clock (8 × 45 °) per revolution, or by measuring
Continued measurements to determine (at the beginning of the effective stroke, central and end take measurement area).
Description.
1 --- Ball screw;
2 --- Ball;
3 --- ball nut.
Figure 1 ball screw pair
Description.
1 --- Ball nut; 4 --- stroke measuring instrument (error ≤ 1μm);
2 --- angle measuring instrument (allowable error ≤10 "); 5 --- clamping device (such as chuck), drive;
3 --- measuring frame; 6 --- ball screw.
Figure 2 basic measurement principle diagram
a) Deviation esa relative to the target travel ls
b) relative to the nominal stroke l0 deviation e0a
Note. The length of the remainder is shown in Table A.3.
a travel deviation.
Figure 3 Determination of the actual average travel deviation esa or e0a
5.2 Travel deviation and variation
Test items
Positioning (P-type) ball screw effective stroke lu travel within the average deviation esa and e0a.
a) the target trip ls;
b) on the nominal trip l0
E1.1
Schematic
a) b)
a Actual travel deviation.
Tolerance
Effective travel lu
mm
> ≤
1600.2000
Within the specified travel tolerance ep
μm
Standard tolerance level
4 6 8 12 16 23 - -
5 7 9 13 18 25 - -
6 8 10 15 20 27 - -
6 9 11 16 22 32 - -
7 10 13 18 25 36 - -
8 11 15 21 29 40 - -
9 13 18 24 34 47 - -
11 15 21 29 40 55 - -
- 18 25 35 48 65 - -
- 22 30 41 57 78 - -
- 26 36 50 69 96 - -
- 32 45 62 86 115 - -
- - - 76 110 140 - -
- - - - - 170 - -
Test results and notes
a) esa = μm
b) User-specified travel compensation value c
c = μm
e0a = μm
measuring instrument
See Figure 2
Testing method
See Figure 2
Test items
Transmission (T-type) ball screw effective stroke lu travel within the average deviation e0a
E1.2
Schematic
a Actual travel deviation.
Tolerance
Within the specified travel tolerance ep
μm
Standard tolerance level
ep = ±
lu
V300p
Test results and notes
e0a = μm
measuring instrument
See Figure 2
Testing method
See Figure 2
Test items
Positioning (P-type) ball screw effective trip travel lu within the stroke variation vu
E2
Schematic
a Actual travel deviation.
Tolerance
Effective travel lu
mm
> ≤
1600.2000
Tolerance vup within specified trip
μm
Standard tolerance level
3.5 6 8 12 16 23 - -
3.5 6 9 12 18 25 - -
4 7 9 13 19 26 - -
4 7 10 14 20 29 - -
5 8 11 16 22 31 - -
6 9 12 17 24 34 - -
6 10 14 19 27 39 - -
7 11 16 22 31 44 - -
- 13 18 25 36 51 - -
- 15 21 29 41 59 - -
- 17 24 34 49 69 - -
- 21 29 41 58 82 - -
- - - 49 70 99 - -
- - - - - 119 - -
Test results and notes
vua = μm
measuring instrument
See Figure 2
Testing method
See Figure 2.
vua is the two straight lines within the effective travel lu parallel to the actual average travel deviation and enveloping the actual travel deviation curve,
The minimum distance measured in the standard direction
Test items
Positioning (P-type) or transmission (T-type) Ball screw Any stroke 300mm stroke variation v300
E3
Schematic
a Actual travel deviation.
Tolerance
Standard tolerance level
v300p
μm
3.5 6 8 12 16 23 52a 210a
a Only for transmission (T type) ball screw pair.
Test results and notes
v300amax = μm
measuring instrument
See Figure 2
Testing method
See Figure 2.
v300a is when a template moves along the actual travel deviation curve and parallel to the actual average travel deviation line and envelops any 300mm length valid line
The actual stroke deviation curve within the parallel to the longitudinal direction of the measured sample width minimum
Test items
Positioning (P-type) ball screw any 2πrad travel within the stroke variation v2π
E4
Schematic
a Actual travel deviation.
Tolerance
Standard tolerance level
v2πp
μm
3 4 5 6 7 8 - -
Test results and notes
v2πamax = μm
measuring instrument
See Figure 2
Testing method
See Figure 2.
v2πa is when a template moves along the actual travel deviation curve and parallel to the actual average travel deviation line, and envelopes any rotation (2πrad) correspondingly valid
The actual travel deviation curve within the travel, measured parallel to the vertical direction of the minimum width of the template.
N in the diagram represents the number of turns of the ball nut relative to the ball screw
5.3 Beating and position tolerances
Test items
Pitch (P-type) or transmission (T-type) ball screw pair at each l5 length, the ball screw diameter runout t5, to determine the relative
AA 'straightness
E5
Schematic
Tolerance
Nominal diameter d0
mm
> ≤
l5
mm
Standard tolerance level
l5 length of the t5p
μm
100.200 1250
16 20 22 25 28 32 40 80
l1/d0
> ≤
l1> t5maxp on the length of 4l5
μm
- 40 32 40 45 50 57 64 80 160
40 60 48 60 67 75 85 96 120 240
60 80 80 100 112 125 142 160.200 400
80 100 128 160 180.200 225 256 320 640
Test results and notes
t5a = μm
t5maxa = μm
Measuring gage
Indicator, contour double V iron
Test method (refer to GB/T 17421.1-1998 of 5.6.1.2.2)
Set the ball screw pair AA 'at two V-shaped iron, adjust the indicator so that the probe in the specified measurement interval l5 vertical contact with the cylindrical surface, slow
Slowly turn the ball screw, note the indicator reading changes. Repeat the test at each of the specified measurement intervals l5
Note 1. Optionally, it is agreed to allow ball screw to be measured on the center hole, where l1 is the total length of the ball screw.
Note 2. If l1 <2l5, measured at l1/2.
Test items
Radial runout of bearing journal of positioning (Class P) or drive (type T) ball screw pair with respect to AA 't6.1 (unit length l).
When l6 ≤ l (l see table);
When l6> l, the measured value t6.1a ≤ t6.1p
l6
E6.1
Schematic
Description. 1 --- support journal.
Tolerance
Nominal diameter d0
mm
> ≤
mm
Standard tolerance level
l length of the t6.1p
μm
6 20 80 - 10 11 12 16 20 40 63
20 50 125 - 12 14 16 20 25 50 80
50 125.200 - 16 18 20 26 32 63 100
125.200 315 - - - 25 32 40 80 125
Test results and notes
Diameter t6.1a
mm μm
mm μm
mm μm
mm μm
Measuring gage
Indicator, contour double V iron
Test method (refer to GB/T 17421.1-1998 of 5.6.1.2.2)
Set the ball screw pair at the AA 'at two V-shaped iron, so that the indicator probe at a distance of l6 at the vertical contact with the cylindrical surface, slowly turn the ball screw, remember
The next indicator reading changes
NOTE. It is agreed to allow the top of the ball screw to be measured on the center hole (in this case, l6 should be the distance from the measuring point to the shaft end).
Test items
Radial runout of the bearing journal of the positioning (P-type) or drive (T-type) ball screw pair relative to the ball thread centerline t6.2
E6.2
Schematic
Description. 1 --- support journal.
Tolerance
Nominal diameter d0
mm
> ≤
Standard tolerance level
0 1 2 3 4 5 -
t6.2p
μm
- 8 3 5 6 8 9 10
8 12 4 5 7 8 10 11
12 20 4 6 8 9 11 12
20 32 5 7 9 10 12 13
32 50 6 8 10 12 13 15
50 80 7 9 11 13 15 17
80 125 - 10 12 15 17 20
Test results and notes
t6.2a = μm
Measuring gage
Indicator, contour double V iron (ball nut assembly or special fixture)
Test method (refer to GB/T 17421.1-1998 of 5.6.1.2.2)
Ball with a ball of the same size of the ball, near the threaded end of the ball screw supporting the ball screw, the pointer probe placed ball screw
Bearing journals on the outer circle, turn the ball screw and write down the indicator reading changes
Note. It is agreed to use the project test instead of E6.1 test.
Test items
Radial runout of the journal of the positioning (P type) or of the drive (T type) ball screw pair with respect to the bearing journal t7.1.
When l7 ≤ l (l see table);
When l7> l, the measured value t7.1a ≤ t7.1p
l7
E7.1
Schematic
Description. 1 --- support journal.
Tolerance
Nominal diameter d0
mm
> ≤
mm
Standard tolerance level
l The length of the t7.1p
μm
6 20 80 - 5 6 6 7 8 12 16
20 50 125 - 6 7 8 9 10 16 20
50 125.200 - 8 9 10 11 12 20 25
125.200 315 - - - 12 14 16 25 32
Test results and notes
Diameter t7.1a
mm μm
mm μm
mm μm
mm μm
Measuring gage
Indicator, contour double V iron
Test method (refer to the provisions of GB/T 17421.1-1998 section 5.6.1.2.2)
Set the ball screw pair AA 'at two V-shaped iron at a distance of l7 at the pointer touch the surface perpendicular to the cylindrical surface, turn the ball screw and
Make note of the indicator reading changes
NOTE. It is agreed to allow the ball screw to be measured on the center hole.
Test items
Radial runout of journal of positioning (P type) or drive (T type) ball bearing pair relative to journal centerline t7.2
E7.2
Schematic
Description. 1 --- support journal.
Tolerance
Nominal diameter d0
mm
> ≤
Standard tolerance level
0 1 2 3 4 5 -
t7.2p
μm
- 8 3 5 6 8 9 10
8 12 4 5 7 8 10 11
12 20 4 6 8 9 11 12
20 32 5 7 9 10 12 13
32 50 6 8 10 12 13 15
50 80 7 9 11 13 15 17
80 125 - 10 13 15 17 20
Test results and notes
t7.2a = μm
Measuring gage
Indicator, V-type iron
Test method (refer to the provisions of GB/T 17421.1-1998 section 5.6.1.2.2)
Place the bearing journal of the ball screw pair horizontally on the two V-shaped irons. Touch the stylus probe to the outer surface of the journal and turn the ball screw one turn.
The next indicator reading changes
Note. It is agreed to use the project test instead of E7.1 test.
Test items
Positioning (P-type) or drive (T-type) ball bearing support bearing neck shoulder surface relative to the AA 'beating t8.1
E8.1
Schematic
t8.1a ≦ t8.1p-1Δ |
Description. 1 --- support journal.
Tolerance
Nominal diameter d0
mm
> ≤
Standard tolerance level
t8.1p
μm
6 63 - 3 4 4 5 5 6 10
63 125 - 4 5 5 6 6 8 12
125.200 - - 6 6 7 8 10 16
Test results and notes
Diameter t8.1a
mm μm
mm μm
mm μm
Measuring gage
Indicator, contour double V iron
Test method (refer to GB/T 17421.1-1998 5.6.3.2)
Set the ball screw pair AA 'at two V-shaped iron, to prevent the ball screw in the axial movement (a ball can be placed in the ball screw center hole and fixed
Surface), so that the indicator touch the probe shoulder perpendicular to the bearing surface and cylindrical surface. Turn the ball screw one turn and note the change in indicator reading
NOTE. It is agreed to allow the ball screw to be measured on the center hole.
Test items
Radial runout of the bearing journal shoulder of the Pilot or Pilot (P-type) or Drive (T-type) ball bearing pair relative to the journal centerline t8.2
E8.2
Schematic
Description. 1 --- support journal.
Tolerance
Nominal diameter d0
mm
> ≤
Standard tolerance level
0 1 2 3 4 5 -
t8.2p
μm
- 8 2 3 3 4 4 5
32 50 2 3 4 4 5 5
50 80 3 4 4 5 6 7
80 125 - 4 5 6 7 8
Test results and notes
t8.2a = μm
Measuring gage
Indicator, V-type iron
Test method (refer to GB/T 17421.1-1998 5.6.3.2)
The ball screw pair bearing journal horizontally placed on the two V-shaped iron, at the same time one end of the ball screw on a fixed surface, touch the probe touch the pointer
Bearing neck shoulder surface, turn the ball screw circle and note the indicator reading changes
Note. It is agreed to use the project test instead of E8.1 test.
Test items
Ball nut mounting end face of positioning (P-type) or drive (T-type) ball screw pair End face beating relative to AA 't9 (only for pregiven
Loaded ball nut)
E9
Schematic
Tolerance
Nut mounting face diameter
D4
mm
> ≤
Standard tolerance level
t9p
μm
16 32 8 10 11 12 14 16 20
32 63 10 12 14 16 18 20 25
63 125 12 16 18 20 22 25 32
125 250 16 20 22 25 28 32 40
250 500 - - - 32 36 40 50
Test results and notes
t9amax = μm
Measuring gage
Indicator, contour double V iron
Test method (refer to GB/T 17421.1-1998 5.6.3.2)
Put the ball screw pair with preload on the V-shaped iron with two equal height at AA 'to prevent the ball screw from moving in the axial direction (a ball can be placed on the ball
Screw hole between the center hole and the fixed surface), so that the indicator touch the probe vertical contact with the ball nut diameter D4 outer edge of the mounting end, to prevent the ball nut relative to the ball
Turn the screw, turn the ball screw and note the change of indicator reading
Test items
Ball nut mounting for positioning (P-type) or drive (T-type) ball screw pair Bezel tangential to the end of AA 't10 (only for pregiven
Load and the ball of the revolving body)
E10
Schematic
a fixed.
Tolerance
Nut mounting face diameter
D1
mm
> ≤
Standard tolerance level
t10p
μm
16 32 8 10 11 12 14 16 20
32 63 10 12 14 16 18 20 25
63 125 12 16 18 20 22 25 32
125 250 16 20 22 25 28 32 40
250 500 - - - 32 36 40 50
Test results and notes
t10amax = μm
Measuring gage
Indicator, contour double V iron
Test method (refer to GB/T 17421.1-1998 of 5.6.1.2.2)
The ball screw pair with preload will be placed on the V-shaped iron of two equal height at AA 'so that the stylus's probe touches perpendicularly the cylindrical surface of the nut mounting outer circle D1
, To prevent the ball screw shaft rotation, slowly turn the ball nut and record the indicator reading changes
Test items
Rectangular ball nut for positioning (P-type) or drive (T-type) ball screw pair Mounting plane Parallelism to AA 't11 (only for pre-
Loaded ball nut)
E11
Schematic
a fixed.
Tolerance
Standard tolerance level
Per 100mm length (cumulative) t11p
μm
14 16 18 20 22 25 32 -
Test results and notes
t11a = μm
Measuring gage
Indicator, contour double V iron
Test method (refer to GB/T 17421.1-1998 5.4.1.2.2)
The ball screw pair with preload will be placed on two V-shaped irons at the AA 'position so that the stylus probe touches the installation plane of the rectangular ball nut vertically,
Inspection along the length of the test l, note changes in the indicator reading
5.4 performance test
Test items
Pitch (P type) or transmission (T-type) ball screw pair Dynamic preload torque variation ΔTp
E12
Schematic
Tp = F × l No seal
Tt = Ft × l with seals
ln = length of ball nut
Description.
X --- travel;
Y --- dynamic preload torque;
1 --- dynamometer.
Tolerance
Tp0
N · m
Standard tolerance level
> ≤ ΔTpp (% of Tp0), lu/d0 ≤ 40, lu ≤ 4000 mm
0.2 0.4 30 35 37 40 45 50 - -
0.4 0.6 25 30 32 35 37 40 - -
0.6 1.0 20 25 27 30 32 35 40 -
1.0 2.5 15 20 22 25 27 30 35 -
2.5 6.3 10 15 17 20 22 25 30 -
6.3 10 - - - 15 17 20 30 -
> ≤ ΔTpp (% of Tp0), 40 \u003clu/d0≤60,lu≤4000mm
0.2 0.4 40 40 45 50 55 60 - -
0.4 0.6 35 35 37 40 42 45 - -
0.6 1.0 30 30 32 35 37 40 45 -
1.0 2.5 25 25 27 30 32 35 40 -
2.5 6.3 20 20 22 25 27 30 35 -
6.3 10 - - - 20 22 25 35 -
> ≤ ΔTpp (% of Tp0), lu> 4000 mm
- 0.6 not specified
0.6 1.0 - - - 40 45 45 50 -
1.0 2.5 - - - 35 40 40 45 -
2.5 6.3 - - - 30 30 35 40 -
6.3 10 - - - 25 25 30 35 -
Test results and notes
No seals
l = m
F = N
Tpa = Nm
ΔTpa = ± Nm
≈ ±% of Tp0
There are seals
Ft = N
Tta = Nm
ΔTta = ± Nm
≈ ±% of Tp0
Measuring instrument
Test bench with dynamometer indication recorder
Testing method
There will be preloaded ball screw pair (with or without seals at both ends) mounted on the test bench, dynamometer and ball nut body connected to the arm l, the measurement time to roll
Ball screw to speed 100r/min in the positive and negative directions of rotation a......
Related standard: GB/T 17587.1-2017 |