CN202074934U

CN202074934U - Vernier

Info

Publication number: CN202074934U
Application number: CN2011201645439U
Authority: CN
Inventors: 李恒; 杨合; 王泽康; 逯若东; 詹梅; 张志勇
Original assignee: Northwestern Polytechnical University
Current assignee: Northwestern Polytechnical University
Priority date: 2011-05-20
Filing date: 2011-05-20
Publication date: 2011-12-14
Anticipated expiration: 2021-05-20

Abstract

The utility model discloses a vernier, which comprises a main scale, an angle scale and a secondary scale, wherein the angle scale is disc-shaped; both the main scale and the secondary scale are strip-shaped; a main scale holder extends from the disc body of the angle scale in radial direction; an angle vernier is cambered; the main scale is arranged on a disc face of the angle scale through the scale holder; the lower end of the secondary scale is connected to the center of the angle scale through a connecting pin shaft; the secondary scale can freely rotate; the angle vernier is fixed on the body of the secondary scale, and the inner cambered edge of the angle vernier is matched with a disc edge of the angle scale; and both the central lines of the main scale and the secondary scale in the length direction pass through the center of circle of the angle scale. Through the vernier, the bending radius and the bending angle of a numerical control bend pipe can be accurately and effectively measured at the same time, a measured value can be accurated to 0.02mm, and the accuracy of measurement of the bending angle can reach 0.02 degree. The vernier has the characteristics of simple structure, low manufacturing cost, easiness in assembly and operation and convenience in subsequent calculation.

Description

A kind of vernier scale

Technical field

The present invention relates to a kind of vernier scale that is used to measure numerical controlled bending of pipe bending radius and angle of bend.

Background technology

The bend pipe part has obtained widespread use owing to satisfy current advanced Plastic Forming field to aspect an urgent demands such as product lightweight, Strengthening and Toughening easily in high-tech sectors such as Aeronautics and Astronautics and automobile.The numerical controlled bending of pipe technology not only is easy to realize tubing plastic bending Accurate Shaping, and has efficient, energy-conservation, stay-in-grade characteristics, is convenient to realize digitizing and hi-techization, and therefore, the numerical control bending forming of tubing has developed into a kind of advanced and applicable technology.Yet after the tube bending forming process finishes, the elastic deformation that contains in the bend pipe deformed region unloads, thereby make pipe fitting produce resilience, and bend pipe medial and lateral stress state is opposite, the mutual superposition of spring-back effect during unloading makes the bending radius of bend pipe spare increase, and angle of bend reduces, bending radius before bending radius after the resilience of bend pipe spare and angle of bend and the resilience and angle of bend produce deviation, have a strong impact on the dimensional accuracy and the efficiency of assembling of bend pipe spare.For resilience effectively being compensated and judging that whether formative radius and shaping angle after the unloading satisfy request for utilization, need accurately measure the bending radius and the angle of bend of bend pipe spare.

At present, Spring-back of Pipe Bending is measured and can be adopted three-coordinates measuring machine, plane projector and vernier universal protractor (proprietary term: " the omnipotent combination bevel protractor of vernier ", open (bulletin) number: 201069347).But, utilize three-coordinates measuring machine accurate scanning bend pipe the most inboard bigger with the difficulty of obtaining unique point with the outermost crestal line, need to carry out the complicated loaded down with trivial details three-dimensional picture and the subsequent treatment of data simultaneously, the cycle is long, cost is high, cost an arm and a leg, the scene that is not suitable for is effectively measured fast and accurately; Plane projector's moderate cost, can be preferably with the outline projection of bend pipe spare in the plane, make things convenient for the measurement of pipe fitting bending radius and angle of bend, but because the footprint of plane projector is less, size restrictions to measurement bend pipe spare is bigger, it is not easy to operate when therefore, plane projector is used to bend pipe spare (comprising numerical controlled bending of pipe spare) measurement of angle with straight-line segment; The vernier universal protractor is cheap, can be directly used in bend pipe spare angle is measured, but the gage beam and the bend pipe straight-line segment both sides crestal line that are difficult to the assurance bevel protractor during owing to actual measurement are accurately fitted, measuring accuracy is difficult to guarantee, simultaneously, the vernier universal protractor can only be measured angle of bend and energy measurement bending radius not.All there is bigger restriction in above bend pipe measuring method, therefore, need to seek a kind of easy, can measure the measurement mechanism of numerical controlled bending of pipe bending radius and angle of bend simultaneously effectively, accurately and fast, this is that current bend pipe spare is realized the accurately efficient key issue that is shaped and needs to be resolved hurrily.

Summary of the invention

For overcoming the measurement mechanism complex structure that exists in the prior art, not easy to operate, the subsequent treatment complexity is loaded down with trivial details, and big to the size restrictions of measuring bend pipe spare, measuring accuracy is difficult to deficiencies such as assurance, the present invention proposes a kind of vernier scale.

The present invention includes main scale, bevel protractor and secondary chi.Bevel protractor is discoid, and main scale and secondary chi are bar shaped, and the bevel protractor dish has the radially chi frame of extended main scale on one's body, and the angle vernier scale is an arc.Main scale is installed on the card of bevel protractor by described chi frame, and secondary chi lower end is by connecting the center that bearing pin is connected bevel protractor, and secondary chi can rotate freely.The angle vernier scale is fixed on the blade of secondary chi, and the arc limit of angle vernier scale is cooperated with angle main scale disk limit.The center of circle of the equal over-angle chi of the center line of main scale and secondary chi length direction.

Main scale comprises main scale vernier scale, main scale guiding ruler and main scale blade; The main scale vernier scale is fixed on the chi frame of main scale; There is chute the inboard of main scale vernier scale; The main scale blade is installed in the chute of main scale vernier scale, and can slide along this chute.

Secondary chi comprises chi frame, angle vernier scale, secondary chi blade, secondary chi guiding ruler and secondary chi vernier scale; Secondary chi vernier scale is fixed on the chi frame of secondary chi; There is chute the inboard of secondary chi vernier scale, and secondary chi blade is installed in the chute of secondary chi vernier scale, and can be free to slide along this chute.

The front end of main scale blade is fixed with and the orthogonal main scale guiding ruler of main scale blade; Main scale guiding ruler front end place is a main scale guiding ruler cutting edge.

Secondary chi blade front end is fixed with and the orthogonal secondary chi guiding ruler of secondary chi blade; Secondary chi guiding ruler front end place is secondary chi guiding ruler cutting edge.

The present invention can measure numerical controlled bending of pipe bending radius and angle of bend simultaneously, is suitable for quick, the accurate and effective realization bending radius and the measurement of angle of bend.Because the bevel protractor anglec of rotation is big, can realize effective measurement of 10 °～300 °, so the present invention can realize measurement to the resilience under the many angle of bend of the differently curved radius of different size tubing by slidably main scale and secondary chi.Cost of manufacture of the present invention is low, and physical construction is succinct, easy assembly manipulation, and subsequent calculations is easy.Vernier scale and master calibration fit tightly no parallax, and can realize that the utmost point slides stably, accuracy of reading, measuring accuracy height.The measured value of bending radius can be accurate to 0.02mm, and the measuring accuracy of angle of bend can reach 0.02 °.

Description of drawings

Fig. 1 is the front view of structural representation of the present invention;

Fig. 2 is that the three-dimensional of general structure of the present invention is looked intention;

Fig. 3 is main scale of the present invention and bevel protractor structural front view;

Fig. 4 is the assembling synoptic diagram of main scale of the present invention and bevel protractor;

Fig. 5 is the structural front view of the secondary chi of the present invention;

Fig. 6 is the assembling synoptic diagram of the secondary chi of the present invention.Wherein:

1. main scale chi frame 2. main scale vernier scales 3. screws 4. main scale guiding ruler cutting edges 5. main scale guiding rulers

6. main scale trip bolt 7. main scale blades 8 bevel protractors 9. angle main scales 10. connect bearing pin

11. angle vernier scale 12. secondary chi 13. secondary chi vernier scale 14. secondary chi guiding ruler 15. secondary chi guiding ruler cutting edges

16. secondary chi trip bolt 17. secondary chi blade 18. long spiro nails

Embodiment

Present embodiment is a kind of vernier scale that is used to measure numerical controlled bending of pipe bending radius and angle of bend, comprises main scale 1, bevel protractor 8 and secondary chi 12.Bevel protractor 8 is discoid, and main scale 1 and secondary chi 12 are bar shaped, and bevel protractor 8 dish has the chi frame of radially extended main scale 1 on one's body, and angle vernier scale 11 is an arc.Main scale 1 is installed on the card of bevel protractor 8 by described chi frame, and secondary chi 12 lower ends are connected on the discoid center of circle of bevel protractor 8 by connecting bearing pin 10, and secondary chi 12 can rotate freely; The center of circle of the equal over-angle chi 8 of center line of main scale 1 and secondary chi 12 length directions, and the center line angulation of main scale 1 and secondary chi 12 is exactly the angle of bending pipes, and angle value is read by angle vernier scale 11 and angle main scale 9.

Main scale 1 comprises main scale vernier scale 2, main scale guiding ruler 5 and main scale blade 7.Main scale blade 7 is with general vernier scale; Main scale vernier scale 2 is fixed on the chi frame of main scale 1 by screw 3.There is chute the inboard of main scale vernier scale 2; The threaded hole of perforation is arranged in the side of main scale vernier scale 2, be used to install main scale trip bolt 6.Main scale blade 7 is installed in the chute of main scale vernier scale 2, and can slide along this chute; After the position of main scale blade 7 in main scale vernier scale 2 chutes determined, main scale trip bolt 6 is screwed in the threaded hole of main scale vernier scale 2 sides, main scale vernier scale 2 and main scale blade 7 are tightened up, make not produce relative slip between the two, thereby guarantee that reading is accurate.The front end of main scale blade 7 is fixed with and main scale blade 7 orthogonal main scale guiding rulers 5.Main scale guiding ruler 5 and main scale blade 7 are connected by interference fit.Main scale guiding ruler 5 front end places are main scale guiding ruler cutting edge 4, are used to the crooked point of contact of card tube material.Be evenly distributed with scale on the blade of the blade of main scale blade 7 and main scale vernier scale 2.

Discoid bevel protractor 8 comprises angle main scale 9 and is connected bearing pin 10.The outer rim punishment of bevel protractor 8 cards is furnished with scale, and what this scale was indicated is the angle number, and promptly every lattice are represented 1 °.The center of bevel protractor 8 has installs the through hole that connects bearing pin 10, by connecting bearing pin 10 secondary chi 12 is connected with bevel protractor 8, and secondary chi 12 can freely be rotated.

Secondary chi 12 comprises chi frame, angle vernier scale 11, secondary chi blade 17, secondary chi guiding ruler 14 and secondary chi vernier scale 13.One end of secondary chi 12 chi framves is installed on the connection bearing pin 10 of angle main scale 8, and can connect the bearing pin rotation around this.Secondary chi vernier scale 13 is fixed on the chi frame of secondary chi by screw 3.There is chute the inboard of secondary chi vernier scale 13; The threaded hole that perforation is arranged in the side of secondary chi vernier scale 13 is used to pacify secondary chi trip bolt 16.Secondary chi blade 17 is installed in the chute of secondary chi vernier scale 13, and can slide along this chute; After the position of secondary chi blade 17 in secondary chi vernier scale 13 chutes determined, secondary chi trip bolt 16 is screwed in the threaded hole of secondary chi vernier scale 13 sides, secondary chi vernier scale 13 is tightened up with secondary chi blade 17, make not produce relative slip between the two, thereby guarantee that reading is accurate.Secondary chi blade 17 front ends are fixed with secondary chi guiding ruler 14, and secondary chi guiding ruler 14 is vertical with secondary chi blade 17, and secondary chi guiding ruler 14 and secondary chi blade 17 are connected by interference fit; Secondary chi guiding ruler 14 front ends have secondary chi guiding ruler cutting edge 15, are used for the crooked point of contact of card tube material.The blade of secondary chi blade 17 and the blade of secondary chi vernier scale 13 are evenly distributed with scale.

Angle vernier scale 11 is fixed on the blade of secondary chi 12 by two angle long spiro nails 18, and the arc limit of angle vernier scale 11 is cooperated with angle main scale 8 disk limits.When secondary chi 12 when connecting bearing pin 10 and rotate, angle vernier scale 11 is with secondary chi 12 rotations, and the zero graduation line indication angle main scale 9 by angle vernier scale 11, angle vernier scale 11 and angle main scale 9 cooperate finishes reading.

Claims

1. a vernier scale is characterized in that, comprises main scale (1), bevel protractor (8) and secondary chi (12); Bevel protractor (8) is discoid, and main scale (1) and secondary chi (12) are bar shaped, and bevel protractor (8) dish has the chi frame of radially extended main scale (1) on one's body, and angle vernier scale (11) is an arc; Main scale (1) is installed on the card of bevel protractor (8) by described chi frame, and secondary chi (12) lower end is by connecting the center that bearing pin (10) is connected bevel protractor (8), and secondary chi (12) can rotate freely; Angle vernier scale (11) is fixed on the blade of secondary chi (12), and the arc limit of angle vernier scale (11) is cooperated with bevel protractor (8) disk limit; The center of circle of the equal over-angle chi of center line (8) of main scale (1) and secondary chi (12) length direction.

2. a kind of according to claim 1 vernier scale is characterized in that, main scale (1) comprises main scale vernier scale (2), main scale guiding ruler (5) and main scale blade (7); Main scale vernier scale (2) is fixed on the chi frame of main scale (1); There is chute the inboard of main scale vernier scale (2); Main scale blade (7) is installed in the chute of main scale vernier scale (2), and can slide along this chute.

3. a kind of according to claim 1 vernier scale is characterized in that, secondary chi (12) comprises chi frame, angle vernier scale (11), secondary chi blade (17), secondary chi guiding ruler (14) and secondary chi vernier scale (13); Secondary chi vernier scale (13) is fixed on the chi frame of secondary chi; There is chute the inboard of secondary chi vernier scale (13), and secondary chi blade (17) is installed in the chute of secondary chi vernier scale (13), and can be free to slide along this chute.

4. as a kind of vernier scale as described in the claim 2, it is characterized in that the front end of main scale blade (7) is fixed with and the orthogonal main scale guiding ruler of main scale blade (7) (5); Main scale guiding ruler (5) front end place is a main scale guiding ruler mouth (4).

5. as a kind of vernier scale as described in the claim 3, it is characterized in that secondary chi blade (17) front end is fixed with and the orthogonal secondary chi guiding ruler of secondary chi blade (17) (14); Secondary chi guiding ruler (14) front end place is a secondary chi guiding ruler cutting edge (15).