Arc spring freedom angle measuring device and measuring process

Abstract

The application relates to the field of measuring equipment and discloses an arc spring freedom angle measuring device and a measuring process, which comprises a workbench, a fixing piece is detachably connected to the workbench, the fixing piece is in the shape of a circular arc, a circular-arc-shaped mounting groove is formed in the fixing piece, a limiting pin is arranged at one end of the mounting groove, a rotating rod is vertically arranged on the workbench, the rotating rod is coaxial with the axis of the mounting groove, a touch rod is horizontally arranged on the rotating rod, the touch rod is detachably connected with the rotating rod, and an angle sensor is arranged on the rotating rod. According to the application, the touch rod is first contacted with a standard piece, the angle sensor is zeroed, then the standard piece is replaced by a spring to be measured, the touch rod is contacted with the spring to be measured again, and the angle displayed by the angle sensor at this time is the angle difference between the spring to be measured and the standard piece. The angle of the spring to be measured can be obtained through simple addition and subtraction, the structure is simple, and the operation is convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of arc spring detection, and in particular to an arc spring freedom angle measuring device and a measuring process. BACKGROUND

[0002] A dual-mass flywheel is a structure applied in the power transmission system of an automobile, which can effectively isolate the torsional vibration of the crankshaft of an engine. The spring assembly in the cavity of the dual-mass flywheel is generally an arc spring. If the angle (radian) of the arc spring does not meet the standard, the spring axis will tilt during the use of the dual-mass flywheel, and a transverse component will be generated during work, which will aggravate the friction or collision of the components, and will cause abnormal noise, accelerate the wear of the spring, and even cause the vehicle transmission and damping to deviate or the vehicle body to roll over uncontrollably. The end faces of the two ends of the arc spring should be perpendicular to the axis direction. If they are not perpendicular, the stress of the arc spring will be affected, and the stress of the spring will also be tilted. Therefore, it is necessary to detect the perpendicularity of the end faces of the spring. At the same time, in order to ensure that the arc spring will deform along the axis direction, each turn of the spring should be distributed along the axis, that is, the planar fit degree of the turns of the spring needs to be detected.

[0003] In the prior art, when detecting the planar fit degree of the turns of the arc spring, the arc spring is placed flat on a plane, and whether each turn of the spring is fitted with the plane is observed by the naked eye, or a thin sheet is inserted below to see whether the arc spring is displaced during the insertion of the thin sheet. The above methods are not accurate enough, and cannot quantify the planar fit degree of each turn of the arc spring, which is not conducive to quality control management in the production process.

[0004] An invention patent with publication number CN113624104B discloses a device for detecting the angle and perpendicularity of an arc spring. When detecting the angle, a limiting pin is first installed into a positioning hole, then a pull rod is pulled to make the clamping plate retreat, a standard piece is placed into the accommodating space of the arc spring between the spring seat and the clamping plate, the left end of the standard piece abuts against the limiting pin, the rotating table is rotated clockwise, the standard piece approaches the angle detection piece, the second hand wheel is rotated to adjust the position of the angle detection piece and the standard piece, the angle detection piece and the end face of the standard piece are tightly aligned, then the second slide rail seat and the rotating table are fixed. The dial gauge is reset to zero, the standard piece is taken out, then the clamping plate is used again to clamp the arc spring to be detected, the reading of the dial gauge is obtained, then the angle is converted according to the conversion table, and the detection is completed. In this structure and method, the arc spring is placed in the rotating table for rotation. During the rotation, the arc spring may be displaced to affect the measurement result, and it is difficult to judge by the naked eye whether the angle detection piece and the end face of the arc spring are exactly aligned. If there is burr on the end of the arc spring, the measured angle will be larger. SUMMARY

[0005] The application aims to provide an arc spring freedom degree angle measuring device and a measuring process, and aims to solve the problem of inaccurate angle measurement of the arc spring in the prior art.

[0006] The above technical objective of the application is achieved by the following technical scheme:

[0007] The arc spring freedom degree angle measuring device comprises a workbench, a fixing member is detachably connected to the workbench, the fixing member is in the shape of a circular arc, a circular arc-shaped mounting groove is formed in the fixing member, a limiting pin is arranged at one end of the mounting groove, a rotating rod is vertically arranged on the workbench, the rotating rod is coaxial with the axis of the mounting groove, a touch rod is horizontally arranged on the rotating rod, the touch rod is detachably connected with the rotating rod, and an angle sensor is arranged on the rotating rod.

[0008] According to the above technical scheme, first, the standard member is placed in the mounting groove and abuts against the limiting pin, the touch rod is rotated, the rotating rod is rotated at the same time, the touch rod is in contact with the end face of the standard member, the reading of the angle sensor is zeroed, then the spring to be measured is placed in the mounting groove, the touch rod is rotated, the touch rod is in contact with the end face of the spring to be measured,

[0009] Further, the fixing member is provided with a measuring member, one end of the touch rod is vertically provided with a touch plate, the touch plate is rotationally connected with the touch rod, a locking mechanism for locking the position of the touch plate is arranged on the touch rod, a current sensor is arranged on the measuring member, a first power supply is connected to the current sensor, and the measuring member, the current sensor, the first power supply and the touch plate are sequentially connected through a circuit.

[0010] According to the above technical scheme, when the touch plate is completely attached to the end face of the standard member, an electric current path is formed among the standard member, the first power supply, the current sensor and the measuring member at this time, and the current sensor displays a value; when the touch plate is in contact with the end of the spring to be measured, if the current is significantly reduced, it indicates that the resistance is increased, and further indicates that the contact area of the touch plate with the spring to be measured is reduced, that is, the end face of the spring to be measured is not completely attached to the touch plate, the end face of the spring to be measured may have burrs, or the end face of the spring to be measured is inclined and the perpendicularity is not up to the standard, and quality treatment is required, and angle measurement and calculation are not required; if the current changes little, it indicates that the contact area of the touch plate with the spring to be measured is normal, the rotating angle of the touch rod is in place, and angle measurement and calculation can be performed.

[0011] Further, a positioning screw hole is formed in the end of the touch rod away from the touch plate, and a positioning bolt is arranged through the positioning screw hole.

[0012] Through the technical scheme, after the touch rod is rotated to the position, the positioning bolt is rotated downward, the end of the positioning bolt abuts against the surface of the workbench, the position of the touch rod is fixed, in order to increase the friction, the end of the positioning bolt can be provided with anti-skid rubber, and after the position of the touch rod is fixed, the touch plate and the limiting pin limit the measured spring from both ends, when the measuring piece moves, the measured spring is prevented from being displaced.

[0013] Further, the fixing member is provided with a sliding groove on the side wall, the measuring piece is provided with a sliding block matched with the sliding groove, two movable rods are vertically arranged on the measuring piece, a limiting plate is arranged on the movable rod, a first spring is sleeved on the movable rod, one end of the first spring is connected with the limiting plate, and the other end is connected with the measuring piece, a rotating roller is arranged between the two movable rods, and a displacement sensor for measuring the displacement of the movable rod is arranged on the measuring piece.

[0014] Through the technical scheme, the measuring piece moves forward along the direction of the sliding groove, the rotating roller always abuts against the surface of the arc-shaped spring and moves up and down on the surface of the arc-shaped spring, the position of the rotating roller and the movable rod moving up and down can be recorded through the displacement sensor, and the distance of the rotating roller and the movable rod moving up and down should be periodically changed under the condition that the quality of the arc-shaped spring is qualified, if a value is too high or too low, it is indicated that the height position of the corresponding turn of the arc-shaped spring is too high or too low, and when the deviation value exceeds the set range, it is determined that the product is unqualified in quality; meanwhile, the circuit passage is formed between the measuring piece, the current sensor, the first power supply, the touch plate and the measured spring, with the continuous movement of the measuring piece, the resistance of the measured spring is continuously reduced, the current should be gradually increased, the data recorded through the current sensor can be corresponded with the position of the turn of the arc-shaped spring, and when the height position of the turn is detected to be unqualified, the current value recorded through the current sensor can be corresponded to find the position of the corresponding spring turn.

[0015] Further, the locking mechanism comprises a connecting rod arranged at the end of the touch rod, a plurality of adjusting rings are sleeved on the connecting rod, the adjusting ring is fixedly connected with one side of the touch plate, an adjusting threaded hole is arranged on the adjusting ring, and an adjusting bolt is arranged through the adjusting threaded hole.

[0016] Through the technical scheme, the adjusting ring rotates on the connecting rod by loosening the adjusting bolt, the angle of the touch plate can be adjusted, the end of the adjusting bolt abuts against the connecting rod by tightening the adjusting bolt, and the position of the touch plate is locked.

[0017] The further arrangement of the present application is that the rotating rod is provided with two clamping plates, a clamping groove is formed between the two clamping plates, the clamping groove is matched with the touch rod, fastening threaded holes are formed in the clamping plates, and fastening bolts are arranged through the fastening threaded holes.

[0018] Through the above technical scheme, the position of the touch rod between the clamping grooves can be adjusted by loosening the fastening bolts, the position of the end of the touch rod is adjusted, and the arc-shaped spring detection of different radian and different length is adapted.

[0019] The further arrangement of the present application is that the fixing member is provided with a connecting plate, a plurality of through holes are formed in the connecting plate, a plurality of connecting threaded holes are formed in the surface of the workbench, connecting bolts are arranged through the through holes, and one end of the connecting bolt is connected with the connecting threaded hole through the through hole.

[0020] Through the above technical scheme, the connecting bolt is connected with the connecting threaded hole through the through hole, the installation of the fixing member is completed, and vice versa, the disassembly of the fixing member is completed, the disassembly and installation are convenient, the replacement of the fixing member is facilitated, the fixing member should be replaced according to different radian and size of the arc-shaped spring, and the axis of the installation groove should coincide with the axis of the rotating shaft during installation.

[0021] It should be understood that the equipment and principle for converting the measurement electrical signal of the angle sensor, the current sensor and the displacement sensor into digital display and recording are common technologies in the field, and will not be described in detail here.

[0022] An arc-shaped spring freedom degree angle measurement device, characterized by comprising the following steps:

[0023] S1, the standard part is placed in the installation groove, one end of the standard part is abutted against the limiting pin, the touch rod is actuated, the touch rod and the rotating rod are rotated together, one end of the touch rod is gradually close to one end of the standard part, the direction of the touch plate is adjusted, one side of the touch plate is abutted against the end surface of the standard part, the position of the touch plate is locked, the measurement part is moved above the standard part and is in contact with one end of the standard part, the measurement part is in contact with the standard part, the current sensor displays the reading, the reading is recorded, the end surface of the touch plate has been contacted, and the angle sensor also displays the reading, and the angle sensor is zeroed.

[0024] S2, the touch rod is actuated, the touch rod is actuated to the side away from the installation groove, the standard part is taken out, the to-be-measured spring is placed in the installation groove, whether the to-be-measured spring is abutted against the inner wall of the installation groove is observed, one end of the to-be-measured spring is in contact with the limiting pin, the rotating rod is actuated, the touch rod is rotated towards the installation groove, the touch plate is in contact with the end surface of the to-be-measured spring, the measurement part is moved above the to-be-measured spring and is in contact with one end of the to-be-measured spring, and the current sensor displays the reading at this time.

[0025] S3, compare the reading measured in S2 with the reading recorded in S1, if the reading difference is large, the end of the spring to be measured and the touch plate are not completely attached, indicating that the end face of the spring to be measured has burrs or the end face is inclined, etc., and needs to be taken out for processing, if the reading difference is within the set range, it proves that the touch plate and the end face of the spring to be measured are attached, at this time the reading displayed by the angle sensor is the angle difference between the spring to be measured and the standard piece, and the angle of the spring to be measured can be obtained by calculation;

[0026] S4, twist the positioning bolt, the end of the positioning bolt is close to the surface of the workbench, the position of the touch rod is fixed, then the measuring piece is pushed, the measuring piece moves along the sliding groove to the direction of the touch plate, the rotating roller is always attached to the top of the spring to be measured under the action of the first spring, with the movement of the measuring piece, the rotating roller moves up and down on the top of the spring to be measured, the movable rod moves up and down together, the displacement sensor records the position of the movable rod moving up and down, with the movement of the measuring piece, the current recorded by the current sensor gradually increases, the current reading corresponds to the corresponding turn of the spring to be measured, and the reading of the displacement sensor corresponds to the height of the turn, when the reading of the displacement sensor is abnormal, it indicates that the height position of the turn of the spring to be measured is abnormal, and the abnormal turn position can be positioned in cooperation with the degree recorded by the current sensor.

[0027] Compared with the prior art, the beneficial effects of the present application are that:

[0028] 1. The present application adopts a rotating rod and an angle sensor, the touch rod and the rotating rod are first rotated to the end of the standard piece, the angle sensor is zeroed, then the standard piece is replaced by the spring to be measured, the touch rod and the rotating rod are rotated again, when the touch rod and the end face of the spring to be measured are in contact, the angle displayed by the angle sensor is the angle difference between the spring to be measured and the standard piece, and the angle of the spring to be measured can be obtained through simple addition and subtraction, the structure is simple, the operation is convenient, after the spring to be measured is put in, only the touch rod needs to be rotated, and the spring to be measured is always in a stationary state, so that the detection result is more accurate.

[0029] 2. The present application sets the current sensor and the touch plate, the measuring piece, the current sensor, the first power supply, the touch plate and the spring to be measured form a circuit path, whether the end face of the spring to be measured is completely attached to the touch plate can be judged according to the current size displayed by the current sensor, if the attachment is not complete, it indicates that the end face of the spring to be measured may have burrs, or the end face of the spring to be measured is inclined, and the perpendicularity is not up to standard, so that quality treatment is needed.

[0030] 3. The present application sets the movable rod, the rotating roller and the displacement sensor, whether the height of the spring turn is qualified can be quickly detected through the displacement of the movable rod.

[0031] 4. Since the measuring piece, the current sensor, the first power supply, the touch plate and the spring to be measured form a circuit path, with the continuous movement of the measuring piece on the top of the spring to be measured, the resistance of the spring to be measured is continuously reduced, the current should gradually increase, and the data recorded by the current sensor can be one-to-one corresponding to the turn position of the arc spring. When the height position of the turn is detected unqualified, the corresponding spring turn position can be found by corresponding to the current value recorded by the current sensor. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0033] Figure 1 is a whole structure schematic diagram of an arc spring freedom angle measuring device embodiment one of the present application;

[0034] Figure 2 is a partial structure schematic diagram of an arc spring freedom angle measuring device embodiment one of the present application;

[0035] Figure 3 is a whole structure schematic diagram of an arc spring freedom angle measuring device embodiment two of the present application;

[0036] Figure 4 is a connection structure schematic diagram of a touch rod and a touch plate in an arc spring freedom angle measuring device embodiment two of the present application;

[0037] Figure 5 is a structure schematic diagram of a measuring piece in an arc spring freedom angle measuring device embodiment two of the present application;

[0038] Figure 6 is a sectional view of a measuring piece in an arc spring freedom angle measuring device embodiment two of the present application;

[0039] Figure 7 is a connection structure schematic diagram of a fixing piece and a workbench in an arc spring freedom angle measuring device embodiment two of the present application;

[0040] Figure 8 is a circuit connection schematic diagram in an arc spring freedom angle measuring device embodiment two of the present application.

[0041] In the figure, 1, workbench; 1a, connecting threaded hole; 2, fixing piece; 2a, mounting groove; 2b, limiting pin; 2c, sliding groove; 3, rotating rod; 4, touch rod; 4a, positioning screw hole; 4b, positioning bolt; 5, angle sensor; 6, measuring piece; 6a, sliding block; 6b, movable rod; 6c, limiting plate; 6d, first spring; 6e, rotating roller; 6f, displacement sensor; 7, touch plate; 8, locking mechanism; 8a, connecting rod; 8b, adjusting ring; 8b1, adjusting threaded hole; 8b2, adjusting bolt; 9, current sensor; 10, first power supply; 11, clamping plate; 11a, clamping groove; 11b, fastening threaded hole; 11c, fastening bolt; 12, connecting plate; 12a, through hole; 12b, connecting bolt. DETAILED DESCRIPTION

[0042] The technical solutions of the present application will be described clearly and completely below in combination with the drawings and specific embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0043] Embodiment one:

[0044] The arc spring freedom angle measuring device provided by the present application comprises a workbench 1, a fixing piece 2 is detachably connected to the workbench 1, the fixing piece 2 is in a circular arc shape, a circular arc-shaped mounting groove 2a is formed in the fixing piece 2, a limiting pin 2b is arranged at one end of the mounting groove 2a, a rotating rod 3 is vertically arranged on the workbench 1, the rotating rod 3 is coaxial with the axis of the mounting groove 2a, a touch rod 4 is horizontally arranged on the rotating rod 3, the touch rod 4 is detachably connected with the rotating rod 3, and an angle sensor 5 is arranged on the rotating rod 3. Figure 1 Figure 2 An arc spring freedom angle measuring process comprises the following steps:

[0045] An arc spring freedom angle measuring process comprises the following steps:

[0046] S1, a standard piece is placed in the mounting groove 2a, one end of the standard piece is abutted against the limiting pin 2b, the touch rod 4 is actuated, the touch rod 4 and the rotating rod 3 rotate together, one end of the touch rod 4 is in contact with the end face of the standard piece, at this time, the angle sensor 5 also displays a reading, and the angle sensor 5 is zeroed;

[0047] ​S2, dial touch lever 4, touch lever 4 is dialled away from the side of the installation slot 2a, remove the standard parts, the measured spring is put into the installation slot 2a, observe whether the measured spring and the inner wall of the installation slot 2a fit, the end of the measured spring is in contact with the limit pin 2b, dial the rotating rod 3, rotate the touch lever 4 towards the installation slot 2a, the touch lever 4 is in contact with the end surface of the measured spring, at this time, the reading displayed by the angle sensor 5 is the angle difference between the measured spring and the standard part, and the angle of the measured spring can be obtained by calculation.

[0048] The technical scheme detects the angle difference between the standard part and the measured spring through the angle sensor 5, and the angle of the measured spring can be obtained through simple addition and subtraction calculation, so that the structure is simple, the operation is convenient, after the measured spring is put in, only the touch lever 4 needs to be rotated, the measured spring is always in a static state, and the detection result is more accurate.

[0049] Example two:

[0050] Different from example one, as shown in Figure 3 and Figure 4 , the fixing part 2 is provided with a measuring part 6, one end of the touch lever 4 is vertically provided with a touch plate 7, the other end of the touch lever 4 away from the touch plate 7 is provided with a positioning screw hole 4a, a positioning bolt 4b is arranged through the positioning screw hole 4a, the touch plate 7 is rotationally connected with the touch lever 4, the touch lever 4 is provided with a locking mechanism 8 for locking the position of the touch plate 7, the locking mechanism 8 comprises a connecting rod 8a arranged at the end of the touch lever 4, a plurality of adjusting rings 8b are sleeved on the connecting rod 8a, the adjusting ring 8b is fixedly connected with one side of the touch plate 7, adjusting screw holes 8b1 are formed in the adjusting ring 8b, adjusting bolts 8b2 are arranged through the adjusting screw holes 8b1, the measuring part 6 is provided with a current sensor 9, the current sensor 9 is connected with a first power supply 10, the measuring part 6, the current sensor 9, the first power supply 10 and the touch plate 7 are sequentially connected through a circuit.

[0051] Two clamping plates 11 are arranged on the rotating rod 3, a clamping groove 11a is formed between the two clamping plates 11, the clamping groove 11a is matched with the touch lever 4, fastening screw holes 11b are formed in the clamping plates 11, and fastening bolts 11c are arranged through the fastening screw holes 11b.

[0052] As shown in Figure 5 and Figure 6As shown, the side wall of the fixing member 2 is provided with a sliding groove 2c, the measuring member 6 is provided with a sliding block 6a matched with the sliding groove 2c, two movable rods 6b are vertically arranged on the measuring member 6, a limiting plate 6c is arranged on the movable rod 6b, a first spring 6d is sleeved on the movable rod 6b, one end of the first spring 6d is connected with the limiting plate 6c, and the other end is connected with the measuring member 6, a rotating roller 6e is arranged between the two movable rods 6b, and a displacement sensor 6f for measuring the displacement of the movable rod 6b is arranged on the measuring member 6.

[0053] As shown in the figure, Figure 7 The fixing member 2 is provided with a connecting plate 12, a plurality of through holes 12a are arranged on the connecting plate 12, a plurality of connecting threaded holes 1a are arranged on the surface of the workbench 1, a connecting bolt 12b is arranged through the through hole 12a, and one end of the connecting bolt 12b is connected with the connecting threaded hole 1a.

[0054] As shown in the figure, Figure 8 The measuring member 6, the current sensor 9, the first power supply 10, the touch plate 7 and the spring to be measured form a circuit path.

[0055] An arc spring freedom angle measurement process, comprising the following steps:

[0056] S1, the standard part is put into the installation slot 2a, one end of the standard part is abutted against the limiting pin 2b, the touch rod 4 is actuated, the touch rod 4 and the rotating rod 3 are rotated together, one end of the touch rod 4 is gradually close to one end of the standard part, the direction of the touch plate 7 is adjusted, one side of the touch plate 7 is abutted against the end surface of the standard part, the position of the touch plate 7 is locked, the measuring member 6 is moved above the standard part and contacted with one end of the standard part, the measuring member 6 is contacted with the standard part, the current sensor 9 displays the reading, the reading is recorded, the touch plate 7 has contacted with the end surface of the standard part, at this time, the angle sensor 5 also displays the reading, and the angle sensor 5 is zeroed.

[0057] S2, the touch rod 4 is actuated, the touch rod 4 is actuated away from the side of the installation slot 2a, the standard part is taken out, the spring to be measured is put into the installation slot 2a, whether the spring to be measured is abutted against the inner wall of the installation slot 2a is observed, one end of the spring to be measured is contacted with the limiting pin 2b, the rotating rod 3 is actuated, the touch rod 4 is rotated towards the installation slot 2a, the touch plate 7 is contacted with the end surface of the spring to be measured, the measuring member 6 is moved above the spring to be measured and contacted with one end of the spring to be measured, at this time, the current sensor 9 displays the reading.

[0058] S3, compare the reading measured in S2 with the reading recorded in S1, if the reading gap is large, the end of the spring to be measured and the touch plate 7 are not completely attached, indicating that the end face of the spring to be measured has burrs or end face tilt and other problems, which need to be taken out for processing, if the reading gap is within the set range, it proves that the touch plate 7 and the end face of the spring to be measured are attached, at this time the reading displayed by the angle sensor 5 is the angle difference between the spring to be measured and the standard part, which can be obtained by calculation The angle of the spring to be measured;

[0059] S4, twist the positioning bolt 4b, the end of the positioning bolt 4b is close to the surface of the workbench 1, the position of the touch rod 4 is fixed, then the measuring part 6 is pushed, the measuring part 6 moves along the sliding groove 2c to the direction of the touch plate 7, the rotating roller 6e is always attached to the top of the spring to be measured under the action of the first spring 6d, with the movement of the measuring part 6, the rotating roller 6e moves up and down on the top of the spring to be measured, the movable rod 6b moves up and down together, the displacement sensor 6f records the position of the movable rod 6b moving up and down, with the movement of the measuring part 6, the current recorded by the current sensor 9 gradually increases, the current reading corresponds to the corresponding turn of the spring to be measured, the reading of the displacement sensor 6f corresponds to the height of the turn, when the reading of the displacement sensor 6f is abnormal, it indicates that the height position of the turn of the spring to be measured is abnormal, combined with the degree recorded by the current sensor 9, the height abnormal turn position can be positioned.

[0060] The working process of the technical solution is as follows:

[0061] Select the standard part, install the standard part corresponding matching fixed part 2 on the workbench 1, then put the standard part into the installation slot 2a, one end is tightly resisted by the limit pin 2b, then rotate the touch rod 4, the touch rod 4 and the rotating rod 3 rotate together until the touch plate 7 and the end face of the standard part are in contact, loosen the fastening bolt 11c to adjust the length of the touch rod 4, then tighten the fastening bolt 11c, then adjust the adjusting bolt 8b2 to rotate the touch plate 7 to adjust the angle until the touch plate 7 and the end face of the standard part are completely attached, move the measuring part 6 to the end of the standard part close to the limit pin 2b, the current sensor 9 appears reading, record the current, then reset the number of the angle sensor 5 to zero, after completion, the touch rod 4 and the rotating rod 3 can be turned to the side;

[0062] Take out the standard part and put in the spring to be measured, observe whether the spring to be measured matches the installation slot 2a to prevent the turns of the spring to be measured from being offset in the horizontal direction, one end of the spring to be measured is resisted by the limit pin 2b, then move the measuring part 6, move the measuring part 6 to the end of the spring to be measured close to the limit pin 2b, then rotate the touch rod 4 and the rotating rod 3 to the end of the spring to be measured, when the touch plate 7 and the end face of the spring to be measured are in contact, the current sensor 9 appears reading, compare the reading with the reading of the standard part before;

[0063] If the difference is large, beyond the set range, for example, when the end face of the measured spring has burrs, at this time the measured spring only has one point in contact with the touch plate 7, or when the perpendicularity of the end face of the measured spring is not up to standard, the end face is inclined, at this time only one point or one side is in contact with the touch plate 7, these two cases will cause the contact area to decrease sharply, the resistance of the measured spring in the circuit will increase significantly, and the current will decrease significantly, which belongs to product quality problems and needs to be taken down for separate processing;

[0064] If the difference is within the set range, it proves that the touch plate 7 is in good contact with the end face of the measured spring, and the end face of the measured spring is qualified, at this time the rotary positioning bolt 4b is screwed down, the end of the positioning bolt 4b is in contact with the surface of the workbench 1, and the positions of the touch rod 4 and the touch plate 7 are fixed;

[0065] After the touch plate 7 is in contact with the end face of the measured spring, a value will be displayed on the angle sensor 5, which is the angle difference between the measured spring and the standard part, which can be directly calculated by addition and subtraction to obtain the angle value of the measured spring;

[0066] When the position of the touch plate 7 is fixed, the touch plate 7 and the limiting pin 2b will clamp the measured spring from both ends, at this time the measuring element 6 is moved, the measuring element 6 moves from one end to the other end, the movable rod 6b and the rotating roller 6e repeatedly move up and down on the top of the measured spring, and the displacement sensor 6f records the value of the up and down movement of the movable rod 6b, after the measuring element 6 moves to the end point, the highest point of the movable rod 6b recorded by the displacement sensor 6f should correspond to each turn of the measured spring, when a certain value is recorded, it proves that the turn position is high, and the spring axis is deviated;

[0067] At the same time, since the measuring element 6, the current sensor 9, the first power supply 10, the touch plate 7, and the measured spring form a circuit path, as the measuring element 6 continuously moves, the resistance provided by the measured spring in the circuit continuously decreases, and the current gradually increases, the current change data recorded by the current sensor 9 can correspond to the turn position of the arc spring, when the height position of the turn is not qualified, the corresponding spring turn position can be found through the current value recorded by the current sensor 9. When the measuring element 6 moves forward, not only the height of each turn of the measured spring is detected, but the current sensor 9 also changes, positioning the position of the measuring element, so that when an abnormal turn height is detected, the position of the abnormal turn can be quickly judged.

[0068] In order to achieve the technical effect that as the measuring element 6 moves, the resistance provided by the measured spring in the circuit continuously decreases and the current gradually increases, the measuring element 6 and the fixed element 2 are insulated, the rotating roller 6e on the measuring element 2 is a conductor and can be connected in circuit with the turn of the measured spring directly below the rotating roller 6e.

[0069] It should be understood that the devices and principles for converting the measurement electrical signals of the angle sensor 5, the current sensor 9, the displacement sensor 6f into digital display and recording are common techniques in the art and will not be described in more detail here.

[0070] The end of the positioning bolt 4b, the adjusting bolt 8b2 and the fastening bolt 11c can be provided with anti-skid rubber to increase the fixing effect.

[0071] It should be noted that the various embodiments described in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be mutually referred to.

[0072] The above description is only a description of the preferred embodiments of the present application, and is not any limitation on the scope of the present application. Any modification or modification made by a person of ordinary skill in the art based on the above disclosure is within the protection scope of the claims.

Claims

1. A device for measuring the degree of freedom angle of an arc spring, characterized in that: The device includes a workbench (1), on which a fixing component (2) is detachably connected. The fixing component (2) is arc-shaped and has an arc-shaped mounting groove (2a). One end of the mounting groove (2a) is provided with a limit pin (2b). A rotating rod (3) is vertically arranged on the workbench (1). The rotating rod (3) is coaxial with the axis of the mounting groove (2a). A touch rod (4) is horizontally arranged on the rotating rod (3). The touch rod (4) is detachably connected to the rotating rod (3). An angle sensor (5) is provided on the rotating rod (3). A measuring component (6) is provided on the fixing component (2), and a touch plate (7) is vertically provided at one end of the touch rod (4). The touch plate (7) is rotatably connected to the touch rod (4). A locking mechanism (8) for locking the position of the touch plate (7) is provided on the touch rod (4). A current sensor (9) is provided on the measuring component (6), and a first power supply (10) is connected to the current sensor (9). The measuring component (6), the current sensor (9), the first power supply (10) and the touch plate (7) are connected in sequence through a circuit. The touch rod (4) has a positioning screw hole (4a) at one end away from the touch plate (7), and a positioning bolt (4b) is provided through the positioning screw hole (4a); The fixing member (2) has a sliding groove (2c) on its side wall. The measuring member (6) is provided with a sliding block (6a) that cooperates with the sliding groove (2c). The measuring member (6) has two movable rods (6b) vertically arranged on it. The movable rods (6b) are provided with a limiting plate (6c). The movable rods (6b) are sleeved with a first spring (6d). One end of the first spring (6d) is connected to the limiting plate (6c), and the other end is connected to the measuring member (6). A rotating roller (6e) is provided between the two movable rods (6b). The measuring member (6) is provided with a displacement sensor (6f) for measuring the displacement of the movable rods (6b).

2. The arc spring degree-of-freedom angle measuring device according to claim 1, characterized in that: The locking mechanism (8) includes a connecting rod (8a) disposed at the end of the touch rod (4), a plurality of adjusting rings (8b) are sleeved on the connecting rod (8a), the adjusting rings (8b) are fixedly connected to one side of the touch plate (7), the adjusting rings (8b) are provided with adjusting threaded holes (8b1), and adjusting bolts (8b2) are provided through the adjusting threaded holes (8b1).

3. The arc spring degree-of-freedom angle measuring device according to claim 1, characterized in that: The rotating rod (3) is provided with two clamping plates (11), and a clamping groove (11a) is formed between the two clamping plates (11). The clamping groove (11a) cooperates with the contact rod (4). The clamping plate (11) is provided with a fastening threaded hole (11b), and a fastening bolt (11c) is provided through the fastening threaded hole (11b).

4. The arc spring degree-of-freedom angle measuring device according to claim 1, characterized in that: The fixing member (2) is provided with a connecting plate (12), and the connecting plate (12) is provided with multiple through holes (12a). The surface of the workbench (1) is provided with multiple connecting thread holes (1a). A connecting bolt (12b) is provided through the through hole (12a), and one end of the connecting bolt (12b) passes through the through hole (12a) and connects to the connecting thread hole (1a).

5. A process for measuring the degree of freedom angle of an arc-shaped spring, based on the arc-shaped spring degree of freedom angle measuring device as described in any one of claims 1-4, characterized in that, Includes the following steps: S1. Place the standard part into the mounting slot (2a), press one end of the standard part against the limit pin (2b), move the touch rod (4), the touch rod (4) and the rotating rod (3) rotate together, one end of the touch rod (4) gradually approaches one end of the standard part, adjust the direction of the touch plate (7) so that one side of the touch plate (7) is in contact with the end face of the standard part, lock the position of the touch plate (7), move the measuring piece (6) above the standard part and contact one end of the standard part, the measuring piece (6) is in contact with the standard part, the current sensor (9) displays the reading, record the reading, the touch plate (7) is in contact with the end face of the standard part, at this time the angle sensor (5) also displays the reading, return the angle sensor (5) to zero; S2. Move the touch rod (4) to the side away from the mounting groove (2a), take out the standard part, put the spring to be tested into the mounting groove (2a), observe whether the spring to be tested fits the inner wall of the mounting groove (2a), put one end of the spring to be tested into contact with the limit pin (2b), move the rotating rod (3) to rotate the touch rod (4) towards the mounting groove (2a), the touch plate (7) into contact with the end face of the spring to be tested, move the measuring part (6) above the spring to be tested and into contact with one end of the spring to be tested, at this time the current sensor (9) displays the reading; S3. Compare the reading measured in S2 with the reading recorded in S1. If the difference in readings is large, the end of the spring to be tested is not completely in contact with the touch plate (7), indicating that there are burrs or tilting problems on the end face of the spring to be tested, and it needs to be removed and processed. If the difference in readings is within the set range, it proves that the touch plate (7) is in contact with the end face of the spring to be tested. At this time, the reading displayed by the angle sensor (5) is the angle difference between the spring to be tested and the standard part. The angle of the spring to be tested can be obtained by calculation. S4. Tighten the positioning bolt (4b). The end of the positioning bolt (4b) is in close contact with the surface of the workbench (1) to fix the position of the touch rod (4). Then push the measuring piece (6). The measuring piece (6) moves along the sliding groove (2c) toward the touch plate (7). The rotating roller (6e) is always in contact with the top of the spring to be tested under the action of the first spring (6d). As the measuring piece (6) moves, the rotating roller (6e) moves up and down on the top of the spring to be tested. The movable rod (6b) moves up and down with it. The displacement sensor (6f) records the position of the movable rod (6b) moving up and down. As the measuring piece (6) moves, the current recorded by the current sensor (9) gradually increases. The current reading corresponds to the corresponding coil of the spring to be tested. The reading of the displacement sensor (6f) corresponds to the height of the coil. When the displacement sensor (6f) has an abnormal reading, it indicates that the height position of the coil of the spring to be tested is abnormal. With the degree recorded by the current sensor (9), the position of the coil with abnormal height can be located.

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