CN109631795A - Bend pipe ellipticity measuring device - Google Patents
Bend pipe ellipticity measuring device Download PDFInfo
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- CN109631795A CN109631795A CN201910036807.3A CN201910036807A CN109631795A CN 109631795 A CN109631795 A CN 109631795A CN 201910036807 A CN201910036807 A CN 201910036807A CN 109631795 A CN109631795 A CN 109631795A
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- 239000000523 sample Substances 0.000 claims abstract description 27
- 230000007246 mechanism Effects 0.000 claims description 27
- 238000003825 pressing Methods 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 5
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 abstract 3
- 238000005452 bending Methods 0.000 description 13
- 238000005096 rolling process Methods 0.000 description 7
- 239000002184 metal Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
- G01B11/255—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures for measuring radius of curvature
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The present invention discloses a kind of bend pipe ellipticity measuring device, including pedestal, pipe fitting ellipticity measurement module and pipe fitting locating module.The pipe fitting ellipticity measurement module and pipe fitting locating module is installed on pedestal, bend pipe is installed on the pipe fitting locating module, the pipe fitting ellipticity measurement module can 360 degree rotated around pipe fitting, and scale axis thereon can move up and down, to drive infrared probe to move up and down, workpiece pedestal on the pipe fitting locating module can be rotated, the bend pipe section of pipe fitting thereon is set to be adjusted to horizontal position, and then it can quickly measure the ovality in the bend pipe section, apparatus of the present invention modularization, it is versatile.
Description
Technical Field
The invention relates to a pipe fitting measuring device, in particular to a device for measuring the ovality of the cross section of a bent pipe.
Background
The metal pipe fitting is bent and formed by determining a reasonable fulcrum and a stress point and applying a certain bending moment or bending force. In the pipe bending forming process, the outer side of the bending deformation area is subjected to tangential tensile stress, and the pipe wall is thinned and even cracked; the inner side is stressed by tangential pressure, the pipe wall is thickened, and even unstability and wrinkling are caused; the resultant force of the two generates a radially inward compressive stress, which causes the cross section to flatten and distort, even collapse. After unloading, the spring back phenomenon is generated due to the residual stress in the bent pipe and the recovery of elastic deformation. Therefore, the problems of tension cracking, wrinkling, cross section distortion, resilience and the like are easily caused in the pipe bending forming process, and the method is a complex forming process with multiple forming defects.
When the metal bent pipe is applied to different fields, the forming performance indexes of the metal bent pipe, such as wall thickness reduction rate, wall thickness thickening rate, fold degree, ovality, resilience precision and the like, have corresponding standards or requirements. After each metal pipe fitting is bent and formed, the relevant forming performance indexes of the metal pipe fitting are measured. The shape forming performance indexes such as the fold degree, the ovality, the springback precision and the like can be measured by special equipment such as a 3D global coordinate measuring instrument, but the cost is high, and a special clamp needs to be designed. Manual positioning measurement can also be adopted, but the precision is not high and the efficiency is low.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the device for measuring the ovality of the section of the bent pipe, which has the advantages of high modularization degree, high measurement precision, simplicity in operation, high modularization degree and high operation efficiency.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a measuring device for the ovality of the section of a bent pipe comprises a base, a pipe fitting ovality measuring module and a pipe fitting positioning module; the pipe fitting ovality measuring device comprises a rotating base, a scale shaft bracket, a scale shaft and an infrared probe; the rotary base is installed on the base through a thrust ball bearing, the rotary base is fixedly connected with the two scale shaft supports through connecting pieces, each scale shaft support is provided with a scale shaft capable of being adjusted up and down, the adjusting direction is the same as the axial direction of the thrust ball bearing, and the upper end of the scale shaft is provided with an infrared probe; the pipe fitting positioning module comprises a supporting shaft, a workpiece base, an angle display instrument for measuring the rotating angle of the workpiece base relative to the supporting shaft, a clamping mechanism and a clamping mechanism; the upper end of the supporting shaft is fixedly connected with the workpiece base through a clamping mechanism, and an angle display instrument is installed on the clamping mechanism; the lower end of the supporting shaft penetrates through a through hole in the center of the rotating base and then is fixedly connected with the base, and the upper surface of the workpiece base is fixedly provided with a bent pipe through a clamping mechanism.
The clamping mechanism comprises a pressing block, a stop block, a lead screw and a rotating handle; the workpiece base comprises a cylindrical block and a rectangular block connected with the middle of the bottom surface of the cylindrical block; the rectangular block is provided with a second bolt hole with a key slot, the upper surface of the cylindrical block of the workpiece base is provided with at least three rectangular sliding grooves which are uniformly distributed along the circumferential direction, the pressing block is slidably arranged in the rectangular sliding grooves and is sleeved on the lead screw, the stop block is fixed in the rectangular sliding grooves, the lead screw is also supported and arranged on the stop block, and one end of the lead screw, which penetrates through the stop block, is provided with a rotating handle;
the clamping mechanism comprises a round-head bolt and a supporting shaft with a U-shaped groove at the upper end; a rectangular block of the workpiece base is arranged in the U-shaped groove of the supporting shaft; two side wall surfaces of the U-shaped groove are provided with first bolt holes with key grooves; the round-head bolt is inserted into a first key slot bolt hole on the side wall of the U-shaped groove, a second key slot bolt hole on the rectangular block of the workpiece base and a first key slot bolt hole on the other side wall of the U-shaped groove in sequence, and then is fixedly connected through a nut, and the rectangular block at the lower end of the workpiece base is fixedly connected with the round-head bolt through a key.
The clamping mechanism further comprises a rectangular fastener, and a side wall shaft groove is further formed in the side wall surface of the U-shaped groove; and the side wall shaft groove is provided with a rectangular fastener.
The angle display instrument comprises a display, a pointer type resistance card and a U-shaped resistance card; the U-shaped resistance card bonds at the U type groove lateral wall of back shaft, pointer type resistance card one end fix on clamping mechanism's button head bolt, the other end contacts with U type resistance card, pointer type resistance card and U type resistance card pass through the circuit with the display respectively and link to each other.
The connecting piece comprises a long shaft and a rectangular block, the long shaft penetrates through holes formed in two sides of the rotating base and is fixedly connected with the rotating base, two ends of the long shaft are fixedly connected with the rectangular block respectively, and the scale shaft support is fixed on the rectangular block.
The upper end surface of the workpiece base is carved with a base line for clamping the elbow in the radial direction, and before the elbow is clamped on the workpiece base, the elbow is firstly scribed by an elbow central line scriber and then clamped with the base line on the workpiece base.
The infrared probe is also connected with a computer through Bluetooth and transmits the measured data to the computer in real time.
The scale shaft and the scale shaft support realize annular positioning through keys.
The scale shaft support and the rectangular block realize annular positioning through keys.
The invention has the following beneficial effects:
(1) the workpiece base can rotate around the supporting shaft in an angle mode, and the rotating angle is displayed through the rotating angle measuring device, so that the rotating angle of the workpiece base can be adjusted, the cross sections of the bending sections of the bent pipes with different bending angles clamped on the workpiece base can rotate to the horizontal position, and the ovality at the cross section can be conveniently measured.
(2) The scale shaft accessible is screwed up the holding screw on the hollow cylinder and is compressed tightly the location to it, is provided with the scale on the surface of scale shaft and is used for showing infrared probe's mounting height, thereby is favorable to guaranteeing the probe highly uniform on both sides simultaneously and can measure the ellipticity of the bending section cross section of the return bend of different length.
(3) The cooperation of rotating base and back shaft belongs to clearance fit, so it can rotate around the back shaft to can drive the infrared probe of both sides and carry out 360 degrees rotations around being surveyed the bent pipe, and then can be accurate measure the biggest and minimum diameter of bending section cross section, calculate accurate ellipticity.
(4) A thrust ball bearing is arranged between the rotating base and the base, so that the friction resistance of the rotating base during rotation can be reduced.
(5) The invention adopts a modularized form, is convenient for replacing parts and has strong universality.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an enlarged schematic view of the pipe measuring apparatus of FIG. 1;
FIG. 3 is an enlarged schematic view of the infrared probe of FIG. 2;
FIG. 4 is an enlarged schematic view of the scale shaft support of FIG. 2;
FIG. 5 is an enlarged schematic view of the scale shaft of FIG. 2;
FIG. 6 is an enlarged perspective view of the pipe positioner of FIG. 1;
FIG. 7 is an enlarged schematic view of the pipe positioner of FIG. 1 in mounted relation to an angle indicator;
FIG. 8 is an enlarged top view of the cylindrical block of the base of the workpiece of FIG. 1;
FIG. 9 is an enlarged view of the connection between the cylindrical block and the rectangular block of the workpiece holder of FIG. 1;
FIG. 10 is an enlarged schematic view of the stop of FIG. 6;
FIG. 11 is an enlarged schematic view of the lead screw of FIG. 6;
FIG. 12 is an enlarged schematic view of the rotary handle of FIG. 6;
FIG. 13 is an enlarged schematic view of the support shaft of FIG. 6;
FIG. 14 is an enlarged view of the ball stud of FIG. 6;
FIG. 15 is an enlarged schematic view of the rectangular fastener of FIG. 6;
FIG. 16 is an enlarged schematic view of the angle display of FIG. 7;
fig. 17 is an enlarged schematic view of the base of fig. 1.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments, and the objects and effects of the present invention will become more apparent, and the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 to 17, the apparatus for measuring the cross-sectional ovality of a bent pipe according to the present embodiment includes a base 1, a pipe ovality measuring module 2, and a pipe positioning module 3. The pipe fitting ovality measuring module 2 comprises a rotating base 21, a scale shaft support 24, a scale shaft 25 and an infrared probe 26; the base 1 comprises a base 11, a bolt 12 and a thrust ball bearing 13. A positioning device blind hole 111 is formed in the center of the base 11, and a first plug pin hole 112 is formed in the side edge of the base; the upper surface of the base 11 is concentrically provided with a thrust ball bearing 13, the rotating base 21 is concentrically arranged on the thrust ball bearing 13, the rotating base 21 is fixedly connected with two scale shaft brackets 24 through a connecting piece, each scale shaft bracket 24 is provided with a scale shaft 25 which can be adjusted up and down, the adjusting direction is the same as the axial direction of the thrust ball bearing 13, and the upper end of the scale shaft 25 is provided with an infrared probe 26; the connecting piece comprises a long shaft 22 and a rectangular block 23, the long shaft 22 penetrates through holes formed in two sides of the rotating base 21 to be fixedly connected with the rotating base 21, two ends of the long shaft 22 are fixedly connected with the rectangular block 23 respectively, and the scale shaft support 24 is fixed on the rectangular block 23.
Scales 251 are carved on the outer surface of the scale shaft 25, a second blind hole 252 with a key groove is formed in the upper end of the scale shaft 25, a key groove is formed in a cylinder at the lower end of the infrared probe 26, and the key groove at the lower end of the infrared probe 26 is used for installing a key and then is installed on the second blind hole 252 with the key groove of the scale shaft 25; the infrared probe 26 is also connected with a computer through Bluetooth, and transmits the measured data to the computer in real time. A through hole 241 with a key groove is formed in the inner part of the scale shaft support 24, a third threaded hole 242 is formed in the outer side of the upper end of the scale shaft support 24, a key groove is formed in the outer surface of the scale shaft 25, the key groove in the outer surface of the scale shaft 25 is used for installing a key and then is installed in the through hole 241 with the key groove of the scale shaft support 24, and a set screw is screwed into the third threaded hole 242 to tightly press and position the scale shaft 25. The upper surface of the rectangular block 23 is provided with a first blind hole 232 with a key slot, the outer surface of the scale shaft bracket 24 is provided with a key slot, and the key slot on the outer surface of the scale shaft bracket 24 is used for being installed in the first blind hole 232 with the key slot of the rectangular block 23 after a key is installed. Two second long shaft through holes 231 are formed in the long side surface of the rectangular block 23, second threaded holes 233 are formed in the short side surface of the rectangular block, first long shaft through holes 211 are formed in two sides of the rotating base 21, a first through hole 212 is formed in the middle of the rotating base, first threaded holes 213 are formed in two sides of the rotating base, the long shaft 22 penetrates through the first long shaft through holes 211 of the rotating base 21, two ends of the long shaft 22 are respectively installed in the second long shaft through holes 231 of the two rectangular blocks 23, and fastening screws are screwed into the second threaded holes 233 and the first threaded holes 213 to press and position the rectangular block 23 on the long shaft 22 and press and position the long shaft 22 in the rotating base 21. The infrared probe 26 can be connected with a computer through Bluetooth, and the measured data can be transmitted to the computer in real time.
The pipe fitting positioning module 3 comprises a supporting shaft 31, a workpiece base 34, an angle display instrument 39 for measuring the rotation angle of the workpiece base 34 relative to the supporting shaft 31, a clamping mechanism and a clamping mechanism; the upper end of the supporting shaft 31 is fixedly connected with the workpiece base 34 through a clamping mechanism, and an angle display instrument 39 is mounted on the clamping mechanism; the lower end of the supporting shaft 31 is fixedly connected with the base 1 after passing through the through hole at the center of the rotating base 21, that is, the lower end of the supporting shaft 31 is inserted into the blind hole 111 of the positioning device of the base 11 through the first through hole 212 of the rotating base 21, and the bolt 12 is inserted into the first bolt hole 112 of the base 11 and the second bolt hole 311 of the supporting shaft 31 for positioning. The upper surface of the workpiece base (34) is fixedly provided with an elbow pipe (4) through a clamping mechanism.
The clamping mechanism comprises a pressing block 35, a stop block 36, a lead screw 37 and a rotating handle 38; the workpiece base 34 comprises a cylindrical block 40 and a rectangular block 41 connected with the middle of the bottom surface of the cylindrical block 40; the rectangular block 41 is provided with a second bolt hole 344 with a key slot, the upper surface of the cylindrical block 40 of the workpiece base 34 is provided with at least three rectangular sliding grooves 341 uniformly distributed along the circumferential direction, the pressing block 35 is slidably mounted in the rectangular sliding grooves 341 and sleeved on the lead screw 37, the stopper 36 is fixed in the rectangular sliding grooves 341, the lead screw 37 is further supported and mounted on the stopper 36, and one end of the lead screw 37 penetrating through the stopper 36 is provided with a rotating handle 38; the end face of the inner end of the rectangular sliding groove 341 is provided with a blind hole 342, the blind hole 342 is used for mounting a rolling bearing, the outer end of the bottom surface of the rectangular sliding groove 341 is provided with four fourth threaded holes 343, the press block 35 is provided with a fifth threaded hole 351, the stopper 36 is provided with a second through hole 361 with a larger front section and a smaller rear section in diameter for mounting the rolling bearing, the bottom of the stopper 36 is provided with four sixth threaded holes 362, and the sixth threaded holes 362 on the stopper 36 and the fourth threaded holes 343 on the workpiece base 34 are concentric and are screwed into screws for fixation. One end of the screw rod 37 is provided with a key slot, the screw rod 37 passes through the fifth threaded hole 351 of the press block 35 and is provided with rolling bearings at two ends respectively, one end of the screw rod 37 without the key slot is arranged in the blind hole 342 of the workpiece base 34, one end of the screw rod 37 with the key slot is arranged in the second through hole 361 of the stop block 36, the rotating handle 38 is provided with a blind hole 381 with a third key slot, and one end of the screw rod 37 with the key slot is arranged on a key and is arranged on the rotating handle 38 to be provided with a blind hole 381 with a third key slot, so that the linkage of the rotating handle 38 and the screw rod 37 is realized.
The clamping mechanism comprises a round head bolt 33 and a supporting shaft 31 with a U-shaped groove 312 at the upper end; the lower end of the supporting shaft 31 is cylindrical, the upper end of the supporting shaft is cuboid, a second bolt hole 311 is formed in the lower end of the cylindrical shape, a U-shaped groove 312 is formed in the upper end of the cuboid, and a rectangular block 41 of the workpiece base 34 is installed in the U-shaped groove 312 of the supporting shaft 31; two side wall surfaces of the U-shaped groove 312 are provided with first bolt holes 313 with key slots; round-head bolt 33 insert in proper order on the first area keyway bolt hole 313 of U type groove 312 lateral wall, the rectangular block 41 of work piece base 34 second area keyway bolt hole 344 and the first area keyway bolt hole 313 of another lateral wall of U type groove 312, link firmly through the nut, round-head bolt 33 on have the keyway to be used for the mounting key, make work piece base 34's lower extreme rectangular block pass through key fixed connection with round-head bolt 33, realize the linkage of round-head bolt 33 and work piece base 34. The clamping mechanism further comprises a rectangular fastener 32, and a side wall shaft groove 314 is further formed in the side wall surface of the U-shaped groove 312; the side wall shaft slots 314 are provided with rectangular fasteners 32. The round head bolt 33 is provided with a pointer type resistance card jack 331 on the round head side surface and a first wiring hole 332 on the end surface; the rectangular fastener 32 is provided with a bolt hole 321, the rectangular fastener 32 is arranged on the side wall shaft groove 314 of the supporting shaft 31, and a bolt is screwed into the bolt hole 321 of the rectangular fastener 32 and a nut is screwed for doubly fixing the workpiece base 34.
The angle display instrument 39 comprises a display 391, a pointer type resistance sheet 392 and a U-shaped resistance sheet 393; the display 391 is internally provided with a power supply and a conversion circuit, the wall surface of the display 391 is provided with two second wiring holes 3911, and the display 391 is fixed on the cuboid side edge of the upper end of the supporting shaft 31 through screws; one end of the U-shaped resistor 393 is provided with a third wiring hole 3931; the U-shaped resistor 393 is adhered to the side wall of the U-shaped groove 312 of the supporting shaft 31, the small end of the pointer-type resistor 392 is arranged in the pointer-type resistor jack 331 of the round-head bolt 33 on the clamping mechanism in an interference mode, the other end of the pointer-type resistor 392 is in contact with the U-shaped resistor 393, and the pointer-type resistor 392 and the U-shaped resistor 393 are respectively connected with the display 391 through circuits. The two second wiring holes 3911 of the display 391 are respectively connected with the third wiring hole 3931 of the U-shaped resistance sheet 393 and the first wiring hole 332 on the end face of the round-head bolt 33, so that the contact positions of the pointer-type resistance sheet 392 and the U-shaped resistance sheet 393 are different, the resistance is different, the current is changed, and then the electric signal is adjusted by the internal conversion circuit of the display 391 and then displayed on the display to show the change of the rotation angle of the workpiece base. The display 391 may be, but is not limited to, a model SP5-RSS from deep blue.
The upper end surface of the workpiece base 34 is marked with a base line 42 for clamping the elbow 4 along the radial direction, and before the elbow 4 is clamped on the workpiece base 34, the elbow central line scriber is used for scribing the elbow and then aligning and clamping the elbow with the base line on the workpiece base 34.
When the installation is carried out, the base 1 is firstly installed, the base 11 is horizontally fixed at a certain position, and the thrust ball bearing 13 is concentrically arranged on the base 11.
Next, the pipe measuring device 2 is installed, the two long shafts 22 respectively penetrate through the two first long shaft through holes 211 of the rotating base 21, then the two set screws are respectively screwed into the first threaded holes 213 on the two sides of the rotating base 21, then the two rectangular blocks 23 are respectively inserted into the two ends of the two long shafts 22 through the two second long shaft through holes 231 on the long sides of the rectangular blocks, and then the two set screws are respectively screwed into the second threaded holes 233 on the short sides of the two rectangular blocks 23. Next, two flat keys are respectively installed in the key grooves of the two scale shaft brackets 24, the two scale shaft brackets 24 are respectively inserted into the first key groove blind holes 232 of the two rectangular blocks 23, the flat keys thereon are installed opposite to the key grooves, and two set screws are respectively screwed into the second screw holes 242 of the two scale shaft brackets 24. Next, two flat keys are respectively fitted into the key grooves of the two scale shafts 25, and the two scale shafts 25 are respectively inserted into the first through-holes 241 with key grooves of the two scale shaft holders 24, with the flat keys thereof fitted against the key grooves. Finally, two flat keys are respectively installed in a key groove of a cylinder at the lower end of the infrared probe 26, the two infrared probes 26 are respectively inserted into the second blind hole 252 with the key groove on the scale shaft 25, the flat keys on the two flat keys are installed opposite to the key groove, and the rotating base 21 is concentrically arranged on the thrust ball bearing 13.
Finally, the pipe fitting positioning device 3 is installed, firstly, three rolling bearings are respectively arranged in three blind holes 342 of the workpiece base 34 in an interference fit mode, then three lead screws 37 respectively penetrate through fifth threaded holes 351 of three pressing blocks 35 and then are arranged in three rectangular sliding grooves 341 of the workpiece base 34 together, the end, without the key groove, of each lead screw is arranged in the rolling bearing in the blind hole 342 of the workpiece base 34 inwards, then the three rolling bearings are respectively arranged in second through holes 361 of three stoppers 36 in an interference fit mode, then the three stoppers 36 respectively penetrate through the end, with the key groove, of the three lead screws 37 through the rolling bearings on the stoppers 36 and are arranged in the three rectangular sliding grooves 341 of the workpiece base 34, then screws are respectively screwed into sixth threaded holes 362 on the stoppers 36 and fourth threaded holes 343 of the workpiece base 34 to fix the stoppers 36, and then three flat keys are respectively arranged in the key grooves of the three lead screws 37, the three rotary handles 38 are then respectively fitted into the splined ends of the three lead screws 37 through the third splined blind holes 381 thereon, with the splines thereon being mounted against the flat keys. The rectangular fastener 32 is then mounted on the side wall shaft groove 314 of the supporting shaft 31, then the rectangular block at the lower end of the workpiece base 34 is placed in the U-shaped groove 312 of the supporting shaft 31, the second key-slot bolt hole 344 on the rectangular block is concentric with the first key-slot bolt hole 313 of the supporting shaft 31, then the flat key is mounted in the key slot on the round head bolt 33, and then the flat key is inserted into the first key-slot bolt hole 313 of the supporting shaft 31 and the second key-slot bolt hole 344 of the workpiece base 34, and the threaded end is screwed with a nut for fixing the workpiece base 34. Then, bolts are inserted into the bolt holes 321 of the rectangular fasteners 32 and nuts are screwed for doubly fixing the workpiece mount 34, and then the support shaft 31 is inserted into the positioner blind hole 111 on the mount 11 through the first through hole 212 of the rotary mount 21 and the thrust ball bearing 13 center hole, and the plug 12 is inserted into the first plug hole 112 of the mount 1 and the second plug hole 311 of the support shaft 31. Finally, the angle indicator 39 is installed by fixing the indicator 391 to the rectangular parallelepiped side of the upper end of the support shaft 31 by screws, fixing the U-shaped resistive sheet 393 to the rectangular parallelepiped side of the upper end of the support shaft 31 by bonding, and then inserting the small end of the pointer-type resistive sheet 392 into the pointer-type resistive sheet insertion hole 331 of the round-head bolt 33 with interference, with the other end contacting the U-shaped resistive sheet 393.
When the infrared probe is used, the set screw on the rectangular block 23 is screwed down to be fixed on the long shaft 22, the infrared probe 26 is connected with a computer through Bluetooth, and the computer displays the distance between the two probes. Then, the bent pipe 4 with the central line drawn thereon is vertically placed at the central position of the workpiece base 34, the central line on the bent pipe 4 is aligned with the base line 42 on the workpiece base 34, and the positions of the three press blocks 35 are adjusted by rotating the lead screw to clamp and fix the bent pipe 4. Then, the two ends of the two wires are inserted into the second wiring hole 411 of the display 41 and the third wiring hole 431 of the U-shaped resistive sheet 43, the second wiring hole 411 of the display 41 and the first wiring hole 332 on the end face of the round-head bolt 33, the display 41, the pointer type resistive sheet 42 and the U-shaped resistive sheet 43 are connected,then, the rotation angle of the workpiece base 34 is manually adjusted through the bending angle of the bent pipe and the angle displayed by the display 41 is used for assisting adjustment so that the section of the bent pipe is adjusted to the horizontal position, then the nut of the round-head bolt 33 is screwed, and the nut of the bolt on the rectangular fastener 32 is screwed to fix the workpiece base. Finally, the left and right positions of the long shaft 22 are manually adjusted to enable the infrared probes 26 on the two sides of the long shaft to be approximately symmetrically distributed on the section of the bending section of the bent pipe 4, then the set screws on the two sides of the rotating base 21 are screwed to fix the long shaft 22, then the scale shaft 25 is manually adjusted to drive the infrared probes 26 on the scale shaft to reach the position of the section of the bending section of the bent pipe, the set screws on the scale shaft bracket 24 are screwed to fix the scale shaft 25, and then the measuring device 2 is rotated by 180 degrees to measure the maximum diameter of the section of the scale shaft 25Andand feeding the data back to a computer, and calculating the ellipticity of the data by using the following ellipticity definition formula.
The ellipticity is defined by the formula:
=×100%
wherein,is ovality;the maximum diameter of the cross-sectional circle;the smallest diameter of a cross-sectional circle;the original diameter of the cross section circle before deformation.
The workpiece base can rotate around the supporting shaft in an angle mode and display the rotating angle through the rotating angle measuring device, so that the rotating angle of the workpiece base can be adjusted to enable the sections of the bent pipes clamped on the workpiece base to rotate to the horizontal position, and the ovality at the position can be conveniently measured. The scale shaft can be tightly pressed and positioned by screwing a set screw on the hollow cylinder, and scales are arranged on the outer surface of the scale shaft and used for displaying the mounting height of the infrared probe, so that the heights of the probes on two sides are ensured to be consistent, and the ovality of the cross sections of the bending sections of the bent pipes with different lengths can be measured. And thirdly, the rotating base is in clearance fit with the supporting shaft, so that the rotating base can rotate around the supporting shaft, the infrared probes on two sides can be driven to rotate for 180 degrees around the bent pipe to be measured, the maximum and minimum diameters of the cross section of the bent section can be accurately measured, and the accurate ellipticity can be calculated. In the fourth invention, a thrust ball bearing is arranged between the rotating base and the base, so that the friction resistance of the rotating base during rotation can be reduced. The fifth invention adopts a modularized form, is convenient for replacing parts and has strong universality.
Claims (9)
1. The measuring device for the ovality of the section of the bent pipe is characterized by comprising a base (1), a pipe fitting ovality measuring module (2) and a pipe fitting positioning module (3); the pipe fitting ovality measuring module (2) comprises a rotating base (21), a scale shaft support (24), a scale shaft (25) and an infrared probe (26); the rotary base (21) is installed on the base (1) through a thrust ball bearing (13), the rotary base (21) is fixedly connected with two scale shaft supports (24) through a connecting piece, each scale shaft support (24) is provided with a scale shaft (25) capable of being adjusted up and down, and the upper end of each scale shaft (25) is provided with an infrared probe (26); the pipe fitting positioning module (3) comprises a supporting shaft (31), a workpiece base (34), an angle display instrument (39) for measuring the rotating angle of the workpiece base (34) relative to the supporting shaft (31), a clamping mechanism and a clamping mechanism; the upper end of the supporting shaft (31) is fixedly connected with the workpiece base (34) through a clamping mechanism, and an angle display instrument (39) is mounted on the clamping mechanism; the lower end of the supporting shaft (31) penetrates through a through hole in the center of the rotating base (21) and then is fixedly connected with the base (1), and the upper surface of the workpiece base (34) is fixedly provided with an elbow (4) through a clamping mechanism.
2. The apparatus for measuring the ovality of the cross section of the bent section of the elbow according to claim 1, wherein the clamping mechanism comprises a pressing block (35), a stop block (36), a lead screw (37) and a rotating handle (38); the workpiece base (34) comprises a cylindrical block (40) and a rectangular block (41) connected with the middle of the bottom surface of the cylindrical block (40); the rectangular block (41) is provided with a second bolt hole (344) with a key slot, the upper surface of a cylindrical block (40) of the workpiece base (34) is provided with at least three rectangular sliding grooves (341) which are uniformly distributed along the circumferential direction, the pressing block (35) is slidably mounted in the rectangular sliding grooves (341) and sleeved on the lead screw (37), the stop block (36) is fixed in the rectangular sliding grooves (341), the lead screw (37) is also supported and mounted on the stop block (36), and one end of the lead screw (37) penetrating through the stop block (36) is provided with a rotating handle (38);
the clamping mechanism comprises a round head bolt (33) and a supporting shaft (31) with a U-shaped groove (312) at the upper end; a rectangular block (41) of a workpiece base (34) is arranged in the U-shaped groove (312) of the supporting shaft (31); two side wall surfaces of the U-shaped groove (312) are provided with first bolt holes (313) with key slots; the round head bolt (33) is fixedly connected through a nut after being sequentially inserted into a first bolt hole (313) with a key slot on the side wall of the U-shaped groove (312), a second bolt hole (344) with a key slot on the rectangular block (41) of the workpiece base (34) and a first bolt hole (313) with a key slot on the other side wall of the U-shaped groove (312).
3. The elbow section ovality measuring device according to claim 2, wherein the clamping mechanism further comprises a rectangular fastener (32), and a side wall shaft groove (314) is further formed in a side wall surface of the U-shaped groove (312); the side wall shaft groove (314) is provided with a rectangular fastener (32).
4. The measuring device for the ovality of the cross section of the bent pipe according to claim 1, wherein the angle display instrument (39) comprises a display (391), a pointer type resistance sheet (392) and a U type resistance sheet (393); the U-shaped resistance sheet (393) is adhered to the side wall of the U-shaped groove (312) of the support shaft (31), one end of the pointer-type resistance sheet (392) is fixed on the round-head bolt (33) of the clamping mechanism, the other end of the pointer-type resistance sheet (392) is in contact with the U-shaped resistance sheet (393), and the pointer-type resistance sheet (392) and the U-shaped resistance sheet (393) are respectively connected with the display (391) through circuits.
5. The device for measuring the ovality of the cross section of the bent pipe according to claim 1, wherein the connecting piece comprises a long shaft (22) and a rectangular block (23), the long shaft (22) penetrates through holes formed in two sides of the rotating base (21) to be fixedly connected with the rotating base (21), two ends of the long shaft (22) are fixedly connected with the rectangular block (23) respectively, and the scale shaft support (24) is fixed on the rectangular block (23).
6. The elbow cross-section ovality measuring device according to claim 1, characterized in that a base line (42) for clamping the elbow (4) is engraved on the upper end face of the workpiece base (34) along the radial direction.
7. The measuring device for the ovality of the cross section of the bent pipe according to claim 1, wherein the infrared probe (26) is further connected with a computer through Bluetooth.
8. An apparatus for measuring the cross-sectional ovality of an elbow according to claim 1, wherein the scale shaft (25) and the scale shaft support (24) are positioned annularly by a key.
9. A device for measuring the ovality of a cross section of a bent pipe according to claim 5, wherein the scale shaft support (24) and the rectangular block (23) are positioned annularly by a key.
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| CN201910036807.3A CN109631795B (en) | 2019-01-15 | 2019-01-15 | Elbow section ellipticity measuring device |
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| CN201910036807.3A CN109631795B (en) | 2019-01-15 | 2019-01-15 | Elbow section ellipticity measuring device |
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| CN109631795B CN109631795B (en) | 2024-03-26 |
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| CN110779468A (en) * | 2019-10-17 | 2020-02-11 | 浙江工业大学之江学院 | Metal pipe bending resilience measuring device |
| CN110788817A (en) * | 2019-10-17 | 2020-02-14 | 浙江工业大学之江学院 | Supporting mechanism for metal bent pipe springback measurement |
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| CN109631795B (en) | 2024-03-26 |
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