CN100430705C - Device for detecting pipe joint thread cutterhead pretightening force - Google Patents
Device for detecting pipe joint thread cutterhead pretightening force Download PDFInfo
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- CN100430705C CN100430705C CNB2006100260748A CN200610026074A CN100430705C CN 100430705 C CN100430705 C CN 100430705C CN B2006100260748 A CNB2006100260748 A CN B2006100260748A CN 200610026074 A CN200610026074 A CN 200610026074A CN 100430705 C CN100430705 C CN 100430705C
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- cutterhead
- pull bar
- mount pad
- rack shaft
- pipe joint
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Abstract
This invention provides one tube belt wire machine knife disc tightening test device, which comprises test fix socket, gear axis, two gear axis, pull bar, test connection board, two axis bearing cover and two block covers and digital torque handle. This invention device can process the knife disc pre-tightening force final testing and select adjust pad thickness according to test data to ensure the normal work of tube and product accuracy.
Description
Technical field
The present invention relates to a kind of pick-up unit, relate in particular to a kind of device for detecting pipe joint thread cutterhead pretightening force.
Background technology
The compound action that general pipe box cupling machine for threading is tiltedly carved piece and cutterhead by Z to the transmission utilization realize X to feeding.The general configuration of cutterhead as shown in Figure 1, X is to the principle of work of feeding as shown in Figure 1.Shown in Fig. 1, Fig. 2,11 is main shaft, 12 be Z to transmission shaft, 13 is specific bearing, 14 for tiltedly carving piece, and 15 is the cutterhead outer end cap, and 151 is that back-moving spring mounting hole, 16 is spring, and 17 for adjusting pad, 18 is slide mass, and 19 is special linear bearing dish, and 20 is knife bar and blade.Z passes to cutterhead slide mass 18 with driving force by tiltedly carving piece 14 to transmission shaft 12, because the effect of specific bearing 13 and cutterhead outer end cap 15, limited Z respectively to transmission shaft upper and lower and cutterhead slide mass forward-and-rearward degree of freedom, thereby finally make slide mass realize the feeding of directions X, its stroke depends on that the slope of tiltedly carving piece and Z are to the amount of feeding, have two special linear bearing dishes 19 before and after slide mass and the outer end cap, so slide mass is rolling friction, one group of spring 16 is equipped with in the slide mass below, mainly plays a part to reset and buffer shock-absorbing.
Because machine for threading the time has one liquid coolant cutterhead of flowing through in design, inevitably caused leakage, As time goes on mix with railway grease in the cutterhead special shaft tray gradually, had a strong impact on its result of use, thereby cutterhead need regularly carry out the off-line maintenance, disintegrate and clean inner each member, change railway grease and part ball, will repair the part wear surface in addition.Yet a problem then can appear when returning dress, because the cutterhead outer end cap comes pretension special shaft tray by pad, that is to say that end cap should contact with pad again contacts with the special shaft tray, positioning phenomenon has so just appearred crossing, if end cap contacts tension (pretightning force is excessive) with the bearing dish with the contacted pine of pad, pad is just inoperative, all power all affacts on the bearing dish, increased slide mass frictional resistance, reduce its serviceable life greatly, the end cap inwall also can be subjected to comparatively serious destruction simultaneously; With the contacted pine of bearing dish (pretightning force is too small), can cause the excesssive gap between slide mass and bearing dish and end cap if end cap contacts tension with pad, pretension lost efficacy.Prior art is when the cutterhead pretension; its inner degree of tightness situation is to hold with artificial feel, finds when reality is used, and this feel is difficult to hold; often because the pretension undue influence of cutterhead has been arrived the product precision and changed by forced-stopping machine, and the cutterhead of going up machine again also identical situation may occur.
Because the cutterhead of each off-line mostly needs the removable parts member, considers the reparation problem of wear surface simultaneously, when practical operation, the inner thickness of adjusting pad of cutterhead is selective variation, if it is improper that thickness is selected, above-mentioned two kinds of failure conditions then can appear, and promptly pretightning force is excessive or too small.We can carry out certain analysis respectively to both of these case.
1), when pretightning force is excessive (pad is thin excessively), because the both sides end cap adopts flange bolt to connect, its great force that axially produces all acts on the special shaft tray of cutterhead inside, thus one, the actual motion of the ball in the bearing dish and end cap inwall and slide mass is changed into the sliding friction formula by the rolling friction formula, incident is lubricated inhomogeneous and stressed too concentrated, therefore the wearing and tearing that not only can strengthen ball, simultaneously can make end cap inwall and slide mass drag mark occur again, the damage of these broken meeting property all is that cutterhead is scrapped most important reason.
2), when pretightning force is too small (pad is blocked up), can make the excesssive gap of special shaft tray and end cap and slide mass, can directly cause the trueness error (see figure 3) of the box cupling of processing in use.Under the normal situation of cutterhead pretension, Z
1To displacement can finally be converted to X by the compound action of tiltedly carving with cutterhead
1, and O
1Point is cutter practical function point, if there is gap S in cutterhead inside, just needs Z
1To displaced portion go to compensate it, and finally make Z
1, X
1The feeding deficiency of direction, i.e. O among the figure
2Point, O
1With O
2The site error of point is exactly the key point that influences box cupling car silk precision.Certainly, the special case that Fig. 3 just seeks for the ease of explaining trueness error, in actual process, because the existence of internal clearance, screw thread adds the size of man-hour according to the cutting reacting force, O
2The position of point changes all the time, thereby is difficult to remove to eliminate gap S by increasing Z to the amount of feeding, so only eliminate by adjusting pad when assembling in this gap.
Summary of the invention
Purpose of the present invention is to solve the problems referred to above that prior art exists, and a kind of device for detecting pipe joint thread cutterhead pretightening force is provided, and is used for the terminal check to the cutterhead pretightning force, and adjusts the thickness of pad according to the selection of the data science of verification.
The object of the present invention is achieved like this: a kind of device for detecting pipe joint thread cutterhead pretightening force, and be used to be installed in link to each other on the machine for threading cutterhead end cap and with the cutterhead slide mass cutterhead pretightning force is detected, it is characterized in that, comprising:
Detect mount pad, be the hollow structure of falling the infundibulate;
Rack shaft, it vertically is arranged on and detects in the mount pad, and stretch out outside the mount pad upper end, and the both sides, lower end are provided with tooth bar;
Two gear shafts are separately positioned on the both sides of detecting rack shaft in the mount pad and also link to each other with the tooth bar engaged transmission of rack shaft both sides respectively;
Pull bar, postponing is connected the upper end of rack shaft;
Detect web joint, be parallel to that pull bar is arranged on a side of pull bar and by a upper end that is bolted to pull bar;
The two bearings lid is installed in the same side of detecting mount pad and also is fixedly linked by bearing and two gear shafts respectively, and the axle head of two gear shafts is protruding by bearing respectively;
Two square covers are connected to the outwardly directed axle head of two gear shafts and can drive the rotation of two gear shafts;
Digital Electronic Torque Wrench can be connected with in the two squares covers any one and drives the square cover rotation that is connected.
Described detection mount pad bottom is equipped with scotch, and this scotch head is provided with the elastic structure that can limit the rack shaft extreme position.
Described detection web joint is provided with and is used for a plurality of screws of being connected with the cutterhead slide mass.
Described detection mount pad is provided with and is used for a plurality of connecting links of being connected with machine for threading cutterhead end cap.
Described pull bar lower end is provided with external thread, and described rack shaft upper end is provided with internal thread, and pull bar is threaded with rack shaft, pull bar Height Adjustable.
Device for detecting pipe joint thread cutterhead pretightening force of the present invention can be used for the terminal check to the cutterhead pretightning force owing to adopted above technical scheme, and adjusts the thickness of pad according to the selection of the data science of verification.Guarantee to manage the operate as normal and the product precision of box cupling machine for threading.
Description of drawings
Fig. 1 is the structural representation of the cutterhead of machine for threading;
Fig. 2 is that the X of machine for threading is to the feed schematic diagram;
Fig. 3 is the internal clearance analysis chart of machine for threading cutterhead shown in Figure 1;
Fig. 4 is the structural representation of device for detecting pipe joint thread cutterhead pretightening force critical piece of the present invention;
Fig. 5 is the side-looking structural representation of device for detecting pipe joint thread cutterhead pretightening force critical piece shown in Figure 4;
Fig. 6 is the principle of work synoptic diagram of device for detecting pipe joint thread cutterhead pretightening force of the present invention;
Fig. 7 is the schematic side view of principle of work synoptic diagram shown in Figure 6.
Embodiment
Referring to Fig. 4, Fig. 5, Fig. 6, device for detecting pipe joint thread cutterhead pretightening force of the present invention comprises and detects mount pad 23, rack shaft 27, two gear shafts 28, pull bar 22, detection web joint 21, two bearings lid 24, two squares cover 25, scotch 26 and Digital Electronic Torque Wrench 30.Detect mount pad 23 and be the hollow structural members of falling the infundibulate, be provided with in the bottom of detection mount pad 23 and be used for a plurality of connecting links 231 of being connected with machine for threading cutterhead end cap; Rack shaft 27 vertically is arranged on and detects in the mount pad 23, and stretch out outside the mount pad upper end, and the both sides, lower end are provided with tooth bar; Two gear shafts 28 are separately positioned on the both sides of rack shaft 27 and link to each other with the tooth bar engaged transmission of rack shaft both sides respectively; Pull bar 22 is postponed and is connected the upper end of rack shaft 27; Detect web joint 21 and be parallel to pull bar 22 and be arranged on a side of pull bar and be fixed on the upper end of pull bar, be used for a plurality of screws of being connected with the cutterhead slide mass detecting to be provided with on the web joint 21 by a bolt 29; Two bearings lid 24 is installed in the same side of detecting mount pad 23 and is fixedly linked by bearing and two gear shafts 28 respectively, and the axle head of two gear shafts is protruding by bearing respectively; Two squares cover 25 is connected to two gear shafts, 28 outwardly directed axle heads can drive the rotation of two gear shafts; Digital Electronic Torque Wrench 30 (cooperate referring to Fig. 6, Fig. 7) can be connected with in the two squares cover any one and drives the square cover rotation that is connected.Scotch 26 is installed in the bottom of detecting mount pad, and this scotch head is provided with elastic structure, can be used for limiting the extreme position of rack shaft 27.
The principle of work of device for detecting pipe joint thread cutterhead pretightening force of the present invention can be in conjunction with Fig. 6, Fig. 7 is described as follows: the detection mount pad 23 of cutterhead pretightning force pick-up unit is fixed in cutterhead end cap 15 bottoms by bolt 31, this bolt hole is former back-moving spring mounting hole 151, to detect web joint 21 again is loaded on the cutterhead slide mass 18 by bolt 32, its relative position can be regulated by the screw thread of pull bar 22 lower ends, a Digital Electronic Torque Wrench 30 is inserted in the pick-up unit square cover 25, because the square cover links to each other with gear shaft 28, when pulling dial torque wrench, square overlaps 25 driven gear axles 28, again by rack shaft 27, pull bar 22 and detection web joint 21 drive slide masses 18.So, just the circumferential movement of dial torque wrench 30 can be converted into moving radially of cutterhead slide mass 18 by pick-up unit, the frictional resistance of while slide mass just can be exchanged into torque value and is shown on the Digital Electronic Torque Wrench.Therefore the size (inner elastic situation) of the cutterhead special shaft tray pretightning force measurement that can obtain quantizing.
The cutterhead pretightning force detects with the detailed process of adjusting as follows:
1), earlier the cutterhead pick-up unit is loaded on the new product cutterhead, then the relative end cap of slide mass is moved around for several times by dial torque wrench, even to guarantee cutterhead slide mass internal lubrication, prevent the detected value distortion that occurs owing to frictional resistance is excessive.
2), make slide mass place below (operating reference position clockwise) of end cap, dial torque wrench is clockwise rotated 10 times, 90 ° of each rotations (the relative end cap of slide mass this moment slowly makes progress), and successively the numeral on the Digital Electronic Torque Wrench is carried out record, 10 groups of data computation mean values of gained, this mean value can be regarded clockwise pretightning force size as.Slide mass is placed end cap the top (operating reference position counterclockwise) subsequently, counterclockwise rotating torque spanner 10 times rotates 90 ° (the relative end cap of slide mass this moment is slowly downward) at every turn again, and profit uses the same method and draws anticlockwise pretightning force size.(step 1 and 2 purposes are to draw the reference value of pretightning force by the detection to the new product cutterhead, thereby provide reference for the detection of repairing the cutterhead pretightning force.Thereby measured new product cutterhead quantity is many more, and its value is just true and reliable more.)
3), the cutterhead that returns behind the dress of maintenance adopts similar step 1) and 2) in method, draw size suitable, counterclockwise pretightning force, with this two value and reference value relatively, whether have the use standard to judge the maintenance cutterhead.If its with the deviation of reference value in ± 5%, then regard as to maintain and finish; In addition, all need to change again the thickness of adjusting pad.
4), change the adjustment spacer thickness again following four kinds of situations arranged:
One, suitable, the counterclockwise value that detects maintenance cutterhead gained is all less than corresponding reference value, and 10 groups of data that record respectively do not have obvious fluctuation.Illustrate that pretightning force is too small this moment, and the thickness that only needs evenly to reduce to adjust according to real data pad gets final product.
Its two, suitable, the counterclockwise value that detects maintenance cutterhead gained is all greater than corresponding reference value, and 10 groups of data that record respectively do not have obvious fluctuation.Illustrate that pretightning force is excessive this moment, only needs evenly to increase the thickness of adjusting pad according to real data and get final product.
Its three, suitable, the counterclockwise value that detects maintenance cutterhead gained is all less than corresponding reference value, and 10 groups of data that record respectively are and increase progressively or decline trend.Illustrate that pretightning force is still too small this moment, and because does not wait the internal clearance, need to change pad into tilting when reducing to adjust spacer thickness, and the pad thicker end places slightly general goal of pretightning force value, and thin end then places the pretightning force smaller part.
Its four, suitable, the counterclockwise value that detects maintenance cutterhead gained is all greater than corresponding reference value, and 10 groups of data that record respectively are and increase progressively or decline trend.Illustrate that pretightning force is excessive this moment, and the internal clearance also do not wait, and just needs change pad into tilting equally when adjusting spacer thickness increasing, and the pad thicker end places slightly general goal of pretightning force value, and thin end then places the pretightning force smaller part.
5), adjust finish after, again cutterhead is carried out the detection of pretightning force, and repeats aforesaid operations, until close, satisfy till the use standard with reference value.
Claims (5)
1, a kind of device for detecting pipe joint thread cutterhead pretightening force is used to be installed in link to each other on the machine for threading cutterhead end cap and with the cutterhead slide mass cutterhead pretightning force is detected, and it is characterized in that this pick-up unit comprises:
Detect mount pad, be the hollow structure of falling the infundibulate;
Rack shaft, it vertically is arranged on and detects in the mount pad, and stretch out outside the mount pad upper end, and the both sides, lower end are provided with tooth bar;
Two gear shafts are separately positioned on the both sides of detecting rack shaft in the mount pad and also link to each other with the tooth bar engaged transmission of rack shaft both sides respectively;
Pull bar, postponing is connected the upper end of rack shaft;
Detect web joint, be parallel to that pull bar is arranged on a side of pull bar and by a upper end that is bolted to pull bar;
The two bearings lid is installed in the same side of detecting mount pad and also is fixedly linked by bearing and two gear shafts respectively, and the axle head of two gear shafts is protruding by bearing respectively;
Two square covers are connected to the outwardly directed axle head of two gear shafts and can drive the rotation of two gear shafts;
Digital Electronic Torque Wrench can be connected with in the two squares covers any one and drives the square cover rotation that is connected.
2, device for detecting pipe joint thread cutterhead pretightening force as claimed in claim 1,
It is characterized in that:
Described detection mount pad bottom is equipped with scotch, and this scotch head is provided with the elastic structure that can limit the rack shaft extreme position.
3, device for detecting pipe joint thread cutterhead pretightening force as claimed in claim 1,
It is characterized in that:
Described detection web joint is provided with and is used for a plurality of screws of being connected with the cutterhead slide mass.
4, device for detecting pipe joint thread cutterhead pretightening force as claimed in claim 1,
It is characterized in that:
Described detection mount pad is provided with and is used for a plurality of connecting links of being connected with machine for threading cutterhead end cap.
5, device for detecting pipe joint thread cutterhead pretightening force as claimed in claim 1,
It is characterized in that:
Described pull bar lower end is provided with external thread, and described rack shaft upper end is provided with internal thread, and pull bar is threaded with rack shaft, pull bar Height Adjustable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100260748A CN100430705C (en) | 2006-04-26 | 2006-04-26 | Device for detecting pipe joint thread cutterhead pretightening force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100260748A CN100430705C (en) | 2006-04-26 | 2006-04-26 | Device for detecting pipe joint thread cutterhead pretightening force |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101063634A CN101063634A (en) | 2007-10-31 |
| CN100430705C true CN100430705C (en) | 2008-11-05 |
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ID=38964801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100260748A Active CN100430705C (en) | 2006-04-26 | 2006-04-26 | Device for detecting pipe joint thread cutterhead pretightening force |
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| Country | Link |
|---|---|
| CN (1) | CN100430705C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107520668A (en) * | 2016-06-20 | 2017-12-29 | 上海瓦姆石油天然气管业有限公司 | A kind of pretension force checking device for machine for threading cutterhead |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5442965A (en) * | 1992-12-07 | 1995-08-22 | Atlas Copco Controls Ab | Torque delivering power tool |
| JP2000074764A (en) * | 1998-08-31 | 2000-03-14 | Toshiba Tungaloy Co Ltd | Socket, torque wrench and gauge for measuring axial tension of bolt |
| EP0987532A2 (en) * | 1998-09-15 | 2000-03-22 | Test GmbH | Measuring device for determining the overall starting torque, the friction moment of a screw head and the pre-stressing force of a tightened screw connection |
| CN2457593Y (en) * | 2000-12-25 | 2001-10-31 | 汤纪清 | Anchor prestress mounting dynameter |
| CN2704036Y (en) * | 2004-04-14 | 2005-06-08 | 赵勋海 | Pretightening dynamometer for prestressed structure |
-
2006
- 2006-04-26 CN CNB2006100260748A patent/CN100430705C/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5442965A (en) * | 1992-12-07 | 1995-08-22 | Atlas Copco Controls Ab | Torque delivering power tool |
| JP2000074764A (en) * | 1998-08-31 | 2000-03-14 | Toshiba Tungaloy Co Ltd | Socket, torque wrench and gauge for measuring axial tension of bolt |
| EP0987532A2 (en) * | 1998-09-15 | 2000-03-22 | Test GmbH | Measuring device for determining the overall starting torque, the friction moment of a screw head and the pre-stressing force of a tightened screw connection |
| CN2457593Y (en) * | 2000-12-25 | 2001-10-31 | 汤纪清 | Anchor prestress mounting dynameter |
| CN2704036Y (en) * | 2004-04-14 | 2005-06-08 | 赵勋海 | Pretightening dynamometer for prestressed structure |
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| Publication number | Publication date |
|---|---|
| CN101063634A (en) | 2007-10-31 |
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