CN204731012U - The test unit of a kind of negative shedding cam face and manufacturing accuracy - Google Patents
The test unit of a kind of negative shedding cam face and manufacturing accuracy Download PDFInfo
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- CN204731012U CN204731012U CN201520433197.8U CN201520433197U CN204731012U CN 204731012 U CN204731012 U CN 204731012U CN 201520433197 U CN201520433197 U CN 201520433197U CN 204731012 U CN204731012 U CN 204731012U
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Abstract
The utility model discloses the test unit of a kind of negative shedding cam face and manufacturing accuracy, comprise test unit mechanical part, opening arm stress measuring device, the displacement of integrated box movement direction, acceleration measurement device, heald frame vertical movement directional acceleration measurement mechanism, support of heald frames acceleration, stressed, torque-measuring apparatus and heald frame crossbeam bend, distortion measuring device; The utility model is by choosing the shedding cam of difformity and manufacturing accuracy, and sensor is placed on each measurement point determined, can draw online with camshaft degree degree change integrated box movement, support of heald frames vibration and the stressed experiment curv of opening arm, so just can study the difform cam of different types quantitatively, the factors such as the change of magnitude of load, rotating speed of studying quantitatively are on open loop system motion and the impact of frame vibration, directly obtain data and curve, provide foundation to the determination of the relation of cam precision and rotating speed.
Description
Technical field
The utility model belongs to air-jet loom field, is specifically related to the test unit of a kind of loom negative shedding cam face and manufacturing accuracy, for measuring the different negative shedding cam face of structure and manufacturing accuracy to integrated box movement, vibration and impulsive force impact.
Background technology
The shedding mechanism of air-jet loom is the very poor mechanical system of working condition, and shedding mechanism is the parts that air-jet loom fault is maximum, and fault amount accounts for 80% of air-jet loom fault total amount.Shedding cam is the motor of opening features, and shedding cam is different, and running quality and the number of faults of mechanism have difference.
Shedding mechanism is the parts that loom defects rate is the highest, and various dynamic performance problems appears in shedding mechanism, traces it to its cause, and one is that the dynamic parameter of shedding mechanism improves along with travelling speed and the passing of service time there occurs change; Two is compliant members that the composition of shedding mechanism has several such as return spring, heald twine and lifting-cord etc.; Compliant member has damping, can buffering vibration, but the poor stability of motion, heald frame is raised to shed open top or drops to bottom, and heald frame cannot stop, and at shed open top or bottom oscillate, amplitude reaches 2 millimeters.Heald frame is not only in direction of motion vibration, and more vibrate in the direction of motion of warp thread, amplitude is more than 2 millimeters, and the consequence of vibration is in heald frame region warp break.
Negative shedding mechanism adopts cam as actuator, and return spring provides restoring force to heald frame, utilizes spring constraint to keep contacting of cam follower and cam bawl.The performances such as the vibration of negative shedding mechanism and stability often depend on precision and the rotating speed of the contour curve of cam, and at the operating frequency range of shedding mechanism, heald frame and mechanism part vibration are acutely.Only have by different curve precision to the measured curve of open loop system effect, the velocity range how many precision adapt to most could be grasped in quantity.
The raising of cam rotating speed, means that cam must promote manufacturing accuracy.For flat shedding cam, use rectangular profile cam, camshaft speed can fall half, uses triangular-shaped profile cam, and camshaft speed can fall 2/3rds, is therefore necessary to study the relation of various and cam precision and integrated box movement, vibration.The impulsive force that vibration during measurement integrated box movement and opening arm are subject to is the element task that must do, make the special test unit that integrated box movement, vibration and opening arm impulsive force are affected, the difform cam of different types can be studied quantitatively, the factors such as the change of magnitude of load, rotating speed of studying quantitatively are on open loop system motion and the impact of frame vibration, directly obtain data and curve, provide foundation to the determination of the relation of cam precision and rotating speed.Lack at present the stressed and heald frame vibration testing device of a kind of special opening arm just, for studying the factor such as cam, friction speed of different types difformity and manufacturing accuracy quantitatively to integrated box movement, vibration and the impact of opening arm impulsive force.
Utility model content
In order to meet the demand, the utility model aims to provide the test unit of a kind of loom negative shedding cam face and manufacturing accuracy, for studying the factor such as cam, friction speed of different types difformity and manufacturing accuracy quantitatively to integrated box movement, vibration and the impact of opening arm impulsive force.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the utility model is achieved through the following technical solutions:
A test unit for negative shedding cam face and manufacturing accuracy, comprises test unit mechanical part, opening arm stress measuring device, integrated box movement direction displacement measuring device, integrated box movement directional acceleration measurement mechanism, heald frame vertical movement directional acceleration measurement mechanism, support of heald frames acceleration measurement device, support of heald frames stress measuring device, support of heald frames torque-measuring apparatus, heald frame crossbeam bend measurement mechanism and heald frame crossbeam distortion measuring device;
Described test unit mechanical part comprises the shedding cam of heald frame and three kinds of shapes and three kinds of manufacturing accuracy, described heald frame is arranged on the heald frame saddle of the frame left and right sides, described heald frame saddle is made up of support of heald frames and the head frame guides be arranged on described support of heald frames mounting platform, two, the left and right side shelves of described heald frame are arranged in the track of described head frame guides, the left and right sides of described frame is provided with one and recovers comprehensive parts, described time comprehensive parts are by returning comprehensive arm, heald twine and return spring group composition, described time comprehensive arm is arranged on the top of described frame both sides, the upper end of described heald twine hooks on the suspension hook of described time comprehensive arm medial extremity, the lower end of described heald twine hooks on the hook of described heald frame entablature, the upper end of described return spring group is connected with the outboard end of described time comprehensive arm, the lower end of described return spring group is connected with the return spring bearing be arranged on outside described frame, described shedding cam is set in one by motor-driven camshaft, described motor is by a Frequency Converter Control rotating speed, described shedding cam drives an opening arm through cam follower, described cam follower is arranged on the input end of described opening arm, the output terminal of described opening arm is provided with heald cord clamping seats, described heald cord clamping seats is provided with a lifting-cord, three, one end pulley of described lifting-cord is connected with the lower draw-bar of described heald frame sill, and the other end of described lifting-cord is connected through two pulleys another lower draw-bar with described heald frame sill,
Described opening arm stress measuring device comprises the first foil gauge group, and described foil gauge group is pasted onto on the arm ridge of described opening arm; Described integrated box movement direction displacement measuring device comprises displacement transducer, and the probe of institute's displacement sensors contacts with the left test bent plate of described heald frame entablature; Described integrated box movement directional acceleration measurement mechanism comprises the first acceleration transducer, and described first acceleration transducer is pasted onto on the right test bent plate of described heald frame entablature; Described heald frame vertical movement directional acceleration measurement mechanism comprises the second acceleration transducer, and described second acceleration transducer is pasted onto the surface of described heald frame entablature; Described support of heald frames acceleration measurement device comprises the 3rd acceleration transducer, and described 3rd acceleration transducer is pasted onto the leading flank of mounting platform on described support of heald frames; Described support of heald frames stress measuring device comprises piezoelectric force transducer, and described piezoelectric force transducer is pasted onto the leading flank of mounting platform under described support of heald frames; Described support of heald frames torque-measuring apparatus comprises torque sensor, and described torque sensor is arranged on one end of the measurement axle in described support of heald frames interstitial hole; The heald frame crossbeam distortion measuring device that described heald frame crossbeam bend measurement mechanism comprises described in bend sensor comprises twist sensors, and described bend sensor and described twist sensors are all arranged on the entablature of described heald frame;
Described first foil gauge group, described bend sensor are all connected with the input end of signal analyzer by bridge signal processor with described twist sensors; Institute's displacement sensors is connected with the input end of signal analyzer by transmitter; Described first acceleration transducer, the second acceleration transducer, the 3rd acceleration transducer and described piezoelectric force transducer are connected to the input end of described signal analyzer respectively by the first load amplifier, the second load amplifier, the 3rd load amplifier, the 4th load amplifier; Described torque sensor is connected to the input end of described signal analyzer by moment of torsion detecting plate; Described camshaft is also provided with a scrambler by gear pair, and described scrambler is connected to the input end of described signal analyzer, and the output terminal of described signal analyzer connects display.
Further, described shedding cam comprises following three kinds of shapes:
1) heart-shaped profile cam;
2) rectangle profile cam;
3) triangle profile cam.
Further, described shedding cam comprises following three kinds of manufacturing accuracy:
1) manufacturing accuracy 0.02 millimeter of cam;
2) manufacturing accuracy 0.10 millimeter of rectangular cam;
3) manufacturing accuracy 0.5 millimeter of rectangular cam.
Further, described bend sensor is placed in apart from the position of shelves end, right side L/2 on described heald frame entablature, and L represents the length of described heald frame crossbeam; Described bend sensor is made up of the left and right extension of the second foil gauge group, first sensor body and described first sensor body, the left and right extension of described first sensor body inserts the inner chamber of its both sides crossbeam, described second foil gauge group is four foil gauges arranged along crossbeam horizontal direction, is pasted onto the middle part surface of described first sensor body.
Further, described twist sensors is placed in described heald frame entablature apart from the position of shelves end, right side L/10, and L represents the length of described heald frame crossbeam; Described twist sensors is made up of the left and right extension of the 3rd foil gauge group, the second sensor body and described second sensor body, the left and right extension of described second sensor body inserts the inner chamber of its both sides crossbeam, described 3rd foil gauge group is four foil gauges arranged along crossbeam horizontal direction 45 °, is pasted onto the middle part surface of described second sensor body.
Further, described second acceleration transducer is fixed on the middle height of described heald frame entablature, is 1/10th of described heald frame length L apart from the spacing of shelves on the right side of described heald frame entablature.
Further, electric bridge supply voltage module is comprised in described bridge signal processor, V/I amplifier, signal amplifier, demodulator and calibration module, described electric bridge supply voltage module is described first foil gauge group, described bend sensor and described twist sensors are powered, the output signal of described foil gauge group is input to described signal analyzer through described V/I amplifier and described signal amplifier, described demodulator is respectively at described electric bridge supply voltage module, described V/I amplifier and described calibration module connect, described calibration module is connected with described signal amplifier.
The beneficial effects of the utility model are:
The utility model devises a kind of special test unit affected integrated box movement, vibration and opening arm impulsive force, the difform cam of different types can be studied quantitatively, the factors such as the change of magnitude of load, rotating speed of studying quantitatively are on open loop system motion and the impact of frame vibration, directly obtain data and curve, provide foundation to the determination of the relation of cam precision and rotating speed.
Above-mentioned explanation is only the general introduction of technical solutions of the utility model, in order to better understand technological means of the present utility model, and can be implemented according to the content of instructions, coordinates accompanying drawing to describe in detail below with preferred embodiment of the present utility model.Embodiment of the present utility model is provided in detail by following examples and accompanying drawing thereof.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, and form a application's part, schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the one-piece construction schematic diagram of the utility model test unit mechanical part;
Fig. 2 is cam of the present utility model, cam follower and opening arm annexation schematic diagram;
Fig. 3 is the installation site schematic diagram of foil gauge group of the present utility model in fig. 2 on opening arm A direction;
Fig. 4 is displacement transducer of the present utility model and the installation site schematic diagram of the first acceleration transducer on heald frame crossbeam;
Fig. 5 is the installation site schematic diagram of the second acceleration transducer of the present utility model on heald frame crossbeam;
Fig. 6 is the left view of Fig. 5;
Fig. 7 is the 3rd acceleration transducer of the present utility model and the installation site schematic diagram of piezoelectric force transducer on support of heald frames;
Fig. 8 is the left view of Fig. 7;
Fig. 9 is the installation site schematic diagram of torque sensor of the present utility model on support of heald frames;
Figure 10 is bend sensor of the present utility model and the installation site schematic diagram of twist sensors on heald frame crossbeam;
Figure 11 is the structural representation of bend sensor of the present utility model;
Figure 12 is the structural representation of twist sensors of the present utility model;
Figure 13 is the signal connection diagram of each measurement mechanism of the utility model;
Figure 14 is the annexation schematic diagram of the utility model first foil gauge group, bend sensor and twist sensors and bridge signal processor;
Figure 15 is the front elevation of triangle profile cam;
Figure 16 is the side view of Figure 15;
Figure 17 is the side view of rectangle profile cam;
Figure 18 is the schematic diagram of heart-shaped profile cam.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the utility model in detail.
A test unit for negative shedding cam face and manufacturing accuracy, comprises test unit mechanical part, opening arm stress measuring device, integrated box movement direction displacement measuring device, integrated box movement directional acceleration measurement mechanism, heald frame vertical movement directional acceleration measurement mechanism, support of heald frames acceleration measurement device, support of heald frames stress measuring device, support of heald frames torque-measuring apparatus, heald frame crossbeam bend measurement mechanism and heald frame crossbeam distortion measuring device;
See Fig. 1, shown in Fig. 2, described test unit mechanical part comprises the shedding cam 2 of heald frame 1 and three kind of shape and three kinds of manufacturing accuracy, described heald frame 1 is arranged on the heald frame saddle 4 of frame 3 left and right sides, described heald frame saddle 4 is made up of support of heald frames 41 and the head frame guides 42 be arranged on described support of heald frames 41 mounting platform, two, the left and right side shelves of described heald frame 1 are arranged in the track of described head frame guides 42, each side being provided with of described frame 3 one recovers comprehensive parts, described time comprehensive parts are by returning comprehensive arm 5, heald twine 6 and return spring group 7 form, described time comprehensive arm 5 is arranged on the top of described frame 3 both sides, the upper end of described heald twine 6 hooks on the suspension hook of described time comprehensive arm 5 medial extremity, the lower end of described heald twine 6 hooks on the hook of described heald frame 1 entablature, the upper end of described return spring group 7 is connected with the outboard end of described time comprehensive arm 5, the lower end of described return spring group 7 is connected with the return spring bearing 8 be arranged on outside described frame 3, described shedding cam 2 is set on a camshaft driven by motor 9 10, described motor 9 controls rotating speed by a frequency converter 11, described shedding cam 2 drives an opening arm 13 through cam follower 12, described cam follower 12 is arranged on the input end of described opening arm 13, the output terminal of described opening arm 13 is provided with heald cord clamping seats 14, described heald cord clamping seats 14 is provided with a lifting-cord 15, three, one end pulley 16 of described lifting-cord 15 is connected with the lower draw-bar of shelves on the left of described frame 3, the other end of described lifting-cord 15 is connected with the lower draw-bar of shelves on the right side of described frame 3 through two pulleys 16.
Camshaft 10 drives shedding cam 2 to rotate, shedding cam 2 drives opening arm 13 to swing through cam follower 12, opening arm 13 is through heald cord clamping seats 14 tractive lifting-cord 15, and lifting-cord 15 is through pulley 16 converting motion direction, and lifting-cord 15 drives heald frame 1 to pump.The return spring group 7 of every side is all made up of 8-15 root return spring, and the effect of return spring is the disengaging preventing opening process split shed cam 2 and cam follower 12.
In shedding mechanism, heald frame is reciprocating between extreme lower position and extreme higher position, and heald frame has one section of quiescent phase in minimum and extreme higher position, lift or fall journey terminate after heald frame high vibration.Heald frame is rendered as framed structure pattern, based on the bending associating vibration shape, therefore needs to measure the vibration of heald frame on several direction.
Measuring position is mainly arranged on the moving region of heald frame, and measurement point divides following four kinds:
1) opening arm response position, is pasted onto on the arm ridge of opening arm by foil gauge group, measures shedding cam to the impulsive force of opening arm;
2) response position of heald frame, measures the response in integrated box movement direction with displacement transducer and acceleration transducer;
3) response position of support of heald frames, impulsive force heald frame supported with piezoelectric force transducer, torque sensor and acceleration transducer measurement integrated box movement, moment and vibration;
4) response position in heald frame crossbeam face, settles foil gauge group sensor, piezoelectric acceleration transducer in heald frame crossbeam face, measure distortion and the vibration of heald frame.
Shown in Figure 3, described opening arm stress measuring device comprises the first foil gauge group 17, and described foil gauge group 17 is pasted onto on the arm ridge of described opening arm 13, measures the impulsive force of described shedding cam 2 to described opening arm 13.
Shown in Figure 4, described integrated box movement direction displacement measuring device comprises displacement transducer 18, and the probe of institute's displacement sensors 18 contacts with the left test bent plate 19 of described heald frame 1 entablature, measures the moving displacement of described heald frame 1; Described integrated box movement directional acceleration measurement mechanism comprises the first acceleration transducer 20, and described first acceleration transducer 20 is pasted onto on the right test bent plate 21 of described heald frame 1 entablature, directly measures the acceleration that described heald frame 1 moves.
Shown in Fig. 5, Fig. 6, described heald frame vertical movement directional acceleration measurement mechanism comprises the second acceleration transducer 22, described second acceleration transducer 22 is pasted onto the middle height of described heald frame 1 entablature, be 1/10th of described heald frame 1 length L apart from the spacing of shelves on the right side of described heald frame 1 entablature, directly measure the acceleration perpendicular to described heald frame 1 direction of motion.
Heald frame is plat wide type frame-like member, and the primary structure of heald frame is made up of lower and upper cross-member and two, left and right side shelves, and about heald frame, two side shelves move up and down in the track of head frame guides.When moving up and down, heald frame produces strong heavy curtain and moves, and the side shelves in motion constantly knock the track of head frame guides.
Shown in Fig. 7, Fig. 8, described head frame guides 42 is bearing on described support of heald frames 41, described head frame guides 42 is made up of hardwearing plastics material, described support of heald frames 41 is made of cast iron, therefore the position of sensor measurement is located on support of heald frames 41, and response position is located on the upper lower platform of support of heald frames 41.Described support of heald frames acceleration measurement device comprises the 3rd acceleration transducer 23, and described 3rd acceleration transducer 23 is pasted onto the leading flank of mounting platform on described support of heald frames 41, measures the vibration that integrated box movement causes described support of heald frames 41; Described support of heald frames stress measuring device comprises piezoelectric force transducer 24, and described piezoelectric force transducer 24 is pasted onto the leading flank of described support of heald frames 41 times mounting platforms, measures integrated box movement to the impulsive force of described support of heald frames 41.
Shown in Figure 9, under the impact of described heald frame 1, described support of heald frames 41 is subject to impacting and reverses, described support of heald frames torque-measuring apparatus comprises torque sensor 37, described torque sensor 37 is arranged on one end of the measurement axle 39 in described support of heald frames 41 interstitial hole, measures the impulsive force of described heald frame 1 to described support of heald frames 41.
Roller follower is instantaneous disengagement from cam face, and tripping and impact cause heald frame to vibrate, and heald frame shakes by force, and heald frame crossbeam is not only curved but also turn round, and placement sensor on heald frame crossbeam measures horizontal deflection of beam and distortion.
Shown in Figure 10, described heald frame crossbeam bend measurement mechanism comprises bend sensor 35, described heald frame crossbeam distortion measuring device comprises twist sensors 36, described bend sensor 35 and described twist sensors 36 are all arranged on the entablature of described heald frame 1, measure the horizontal deflection of beam of described heald frame 1 and distortion respectively.
Further, shown in Figure 11, described bend sensor 35 is placed in apart from the position of shelves end, right side L/2 on described heald frame 1 entablature, and L represents the length of described heald frame 1 crossbeam; Described bend sensor 35 is made up of the left and right extension of the second foil gauge group 351, first sensor body 352 and described first sensor body 352, the left and right extension of described first sensor body 352 inserts the inner chamber of its both sides crossbeam, described second foil gauge group 351 is four foil gauges arranged along crossbeam horizontal direction, is pasted onto the middle part surface of described first sensor body 352.
Further, shown in Figure 12, described twist sensors 36 is placed in described heald frame 1 entablature apart from the position of shelves end, right side L/10, and L represents the length of described heald frame 1 crossbeam; Described twist sensors 36 is made up of the left and right extension of the 3rd foil gauge group 361, second sensor body 362 and described second sensor body 362, the left and right extension of described second sensor body 362 inserts the inner chamber of its both sides crossbeam, described 3rd foil gauge group 361 is four foil gauges arranged along crossbeam horizontal direction 45 °, is pasted onto the middle part surface of described second sensor body 362.
Shown in Figure 13, described first foil gauge group 17, described bend sensor 35 are all connected by the input end of bridge signal processor 25 with signal analyzer 31 with described twist sensors 36; Institute's displacement sensors 18 is connected with the input end of signal analyzer 31 by transmitter 25; Described first acceleration transducer 20, second acceleration transducer 22, the 3rd acceleration transducer 23 and described piezoelectric force transducer 24 are connected to the input end of described signal analyzer 31 respectively by the first load amplifier 27, second load amplifier 28, the 3rd load amplifier 29, the 4th load amplifier 30; Described torque sensor 37 is connected to the input end of described signal analyzer 31 by moment of torsion detecting plate 38; Described camshaft 10 is also provided with a scrambler 33 by gear pair 32, and described scrambler 33 is connected to the input end of described signal analyzer 31, and the output terminal of described signal analyzer 31 connects display 34.Described signal analyzer 31 shows with the integrated box movement of described camshaft 10 angle of revolution change, vibration and opening arm impulsive force influence curve.
Shown in Figure 13, this test unit also comprises clock signal generation device, the time of survey record produces sequential by scrambler 33, camshaft 10 turns round, scrambler 33 is driven to turn round by gear pair 32, the encoded device 33 in angle of revolution converts angle to, coding angle is through being converted into digital signal, measurement sequential is provided, the i.e. X-coordinate of experiment curv, the Y-coordinate of another road signal record motor message and experiment curv, display 34 demonstrates the acceleration and stress curve that change with camshaft 10 angle of revolution.
Further, shown in Figure 14, electric bridge supply voltage module 251 is comprised in described bridge signal processor 25, V/I amplifier 252, signal amplifier 253, demodulator 254 and calibration module 255, described electric bridge supply voltage module 251 is described first foil gauge group 17, described bend sensor 35 and described twist sensors 36 are powered, the output signal of described foil gauge group 17 is input to described signal analyzer 31 through described V/I amplifier 252 and described signal amplifier 253, described demodulator 254 is respectively at described electric bridge supply voltage module 251, described V/I amplifier 252 and described calibration module 255 connect, described calibration module 255 is connected with described signal amplifier 253.
Shape and the manufacturing accuracy of the shedding cam 2 of test respectively have three kinds:
The characteristics of motion of cam; R=R (Φ) represents that the principal radii of cam is taken as the function of angular displacement of the cam Φ; R must meet the requirement of air jet weaving process; camming movement is except the opening and closing meeting shed open; when shed open full gate; heald frame is required a period of time of pausing, and completes pneumatic picking action in pause a period of time domestic demand; After flat combining, it is then beating-up.The form of therefore shedding cam employing pause-rise-pause-decline-pause.
The heald frame number of pages of test: four.
One, three kinds of wide nemaline shedding cams of difference
1) see shown in Figure 15, Figure 16, described shedding cam 2 is triangle profile cam, and camshaft turns 360 °, and triangle profile cam experiences three high points and three low spots, completes three pause-rising-pause-decline-pause circulation.
2) shown in Figure 17, described shedding cam 2 is rectangle profile cam, and camshaft turns 360 °, and rectangle profile cam experiences two high points and two low spots, complete secondary to pause-rise-pause-decline-pause circulation.
3) shown in Figure 18, described shedding cam 2 is heart-shaped profile cam, and camshaft turns 360 °, and heart-shaped profile cam experiences a high point and a low spot, complete once to pause-rise-pause-decline-pause circulation.
Two. the shedding cam of three kinds of different manufacturing accuracy
Cam turns round 360 °, often spends (°) and requires accurate positioning, often spend a footpath value of all corresponding cam, the accuracy requirement 0.01-0.02mm of each footpath value.
Adjacent footpath value twice can not have sudden change, if the accuracy requirement 0.02mm of footpath value, then the accuracy requirement 0.008mm of adjacent footpath value difference twice.
Plane cam measurement has three requirements: one is that cam turns round 360 °, and often spend (°) and require accurate positioning, accuracy requirement is to second; Two is the footpath values often spending all corresponding cam, the accuracy requirement 0.01 ~ 0.02mm of each footpath value; Three is determine another point, and cam manufacture has a starting point, and starting point many points adjacent thereto differ and are less than 0.01 mm in the value of footpath.
Manufacturing accuracy divides Three Estate:
1. the accuracy requirement 0.10mm of footpath value, adjacent footpath value difference accuracy requirement 0.025 twice;
2. accuracy requirement 0.02 mm of footpath value, adjacent footpath value difference accuracy requirement 0.005 twice;
3. the accuracy requirement 0.005mm of footpath value, adjacent footpath value difference accuracy requirement 0.0015 twice.
Above-described embodiment, just in order to technical conceive of the present utility model and feature are described, its objective is and is one of ordinary skilled in the art can be understood content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.The change of every equivalence done by the essence of the utility model content or modification, all should be encompassed in protection domain of the present utility model.
Claims (7)
1. a test unit for negative shedding cam face and manufacturing accuracy, is characterized in that: comprise test unit mechanical part, opening arm stress measuring device, integrated box movement direction displacement measuring device, integrated box movement directional acceleration measurement mechanism, heald frame vertical movement directional acceleration measurement mechanism, support of heald frames acceleration measurement device, support of heald frames stress measuring device, support of heald frames torque-measuring apparatus, heald frame crossbeam bend measurement mechanism and heald frame crossbeam distortion measuring device;
Described test unit mechanical part comprises the shedding cam (2) of heald frame (1) and three kinds of shapes and three kinds of manufacturing accuracy, described heald frame (1) is arranged on the heald frame saddle (4) of frame (3) left and right sides, described heald frame saddle (4) is made up of support of heald frames (41) and the head frame guides (42) be arranged on described support of heald frames (41) mounting platform, two, the left and right side shelves of described heald frame (1) are arranged in the track of described head frame guides (42), the left and right sides of described frame (3) is provided with one and recovers comprehensive parts, described time comprehensive parts are by returning comprehensive arm (5), heald twine (6) and return spring group (7) composition, described time comprehensive arm (5) is arranged on the top of described frame (3) both sides, the upper end of described heald twine (6) hooks on the suspension hook of described time comprehensive arm (5) medial extremity, the lower end of described heald twine (6) hooks on the hook of described heald frame (1) entablature, the upper end of described return spring group (7) is connected with the outboard end of described time comprehensive arm (5), the lower end of described return spring group (7) is connected with the return spring bearing (8) being arranged on described frame (3) outside, described shedding cam (2) is set on a camshaft (10) driven by motor (9), described motor (9) controls rotating speed by a frequency converter (11), described shedding cam (2) drives an opening arm (13) through cam follower (12), described cam follower (12) is arranged on the input end of described opening arm (13), the output terminal of described opening arm (13) is provided with heald cord clamping seats (14), described heald cord clamping seats (14) is provided with a lifting-cord (15), three, one end pulley (16) of described lifting-cord (15) is connected with the lower draw-bar of described heald frame (1) sill, the other end of described lifting-cord (15) is connected with another lower draw-bar of described heald frame (1) sill through two pulleys (16),
Described opening arm stress measuring device comprises the first foil gauge group (17), and described foil gauge group (17) is pasted onto on the arm ridge of described opening arm (13); Described integrated box movement direction displacement measuring device comprises displacement transducer (18), and the probe of institute's displacement sensors (18) contacts with the left test bent plate (19) of described heald frame (1) entablature; Described integrated box movement directional acceleration measurement mechanism comprises the first acceleration transducer (20), and described first acceleration transducer (20) is pasted onto on the right test bent plate (21) of described heald frame (1) entablature; Described heald frame vertical movement directional acceleration measurement mechanism comprises the second acceleration transducer (22), and described second acceleration transducer (22) is pasted onto the surface of described heald frame (1) entablature; Described support of heald frames acceleration measurement device comprises the 3rd acceleration transducer (23), and described 3rd acceleration transducer (23) is pasted onto the leading flank of the upper mounting platform of described support of heald frames (41); Described support of heald frames stress measuring device comprises piezoelectric force transducer (24), and described piezoelectric force transducer (24) is pasted onto the leading flank of mounting platform under described support of heald frames (41); Described support of heald frames torque-measuring apparatus comprises torque sensor (37), and described torque sensor (37) is arranged on one end of the measurement axle (39) in described support of heald frames (41) interstitial hole; The heald frame crossbeam distortion measuring device that described heald frame crossbeam bend measurement mechanism comprises described in bend sensor (35) comprises twist sensors (36), and described bend sensor (35) and described twist sensors (36) are all arranged on the entablature of described heald frame (1);
Described first foil gauge group (17), described bend sensor (35) are all connected by the input end of bridge signal processor (25) with signal analyzer (31) with described twist sensors (36); Institute's displacement sensors (18) is connected by the input end of transmitter (25) with signal analyzer (31); Described first acceleration transducer (20), the second acceleration transducer (22), the 3rd acceleration transducer (23) and described piezoelectric force transducer (24) are connected to the input end of described signal analyzer (31) respectively by the first load amplifier (27), the second load amplifier (28), the 3rd load amplifier (29), the 4th load amplifier (30); Described torque sensor (37) is connected to the input end of described signal analyzer (31) by moment of torsion detecting plate (38); Described camshaft (10) is also provided with a scrambler (33) by gear pair (32), and described scrambler (33) is connected to the input end of described signal analyzer (31), and the output terminal of described signal analyzer (31) connects display (34).
2. the test unit of negative shedding cam face according to claim 1 and manufacturing accuracy, is characterized in that, described shedding cam (2) comprises following three kinds of shapes:
1) heart-shaped profile cam;
2) rectangle profile cam;
3) triangle profile cam.
3. the test unit of negative shedding cam face according to claim 1 and manufacturing accuracy, is characterized in that, described shedding cam (2) comprises following three kinds of manufacturing accuracy:
1) manufacturing accuracy 0.02 millimeter of cam;
2) manufacturing accuracy 0.10 millimeter of rectangular cam;
3) manufacturing accuracy 0.5 millimeter of rectangular cam.
4. according to the test unit of claim 1 negative shedding cam face and manufacturing accuracy, it is characterized in that: described bend sensor (35) is placed in apart from the position of shelves end, right side L/2 on described heald frame (1) entablature, and L represents the length of described heald frame (1) crossbeam; Described bend sensor (35) is made up of the left and right extension of the second foil gauge group (351), first sensor body (352) and described first sensor body (352), the left and right extension of described first sensor body (352) inserts the inner chamber of its both sides crossbeam, described second foil gauge group (351) is four foil gauges arranged along crossbeam horizontal direction, is pasted onto the middle part surface of described first sensor body (352).
5. the test unit of negative shedding cam face according to claim 1 and manufacturing accuracy, it is characterized in that: described twist sensors (36) is placed in described heald frame (1) entablature apart from the position of shelves end, right side L/10, and L represents the length of described heald frame (1) crossbeam; Described twist sensors (36) is made up of the left and right extension of the 3rd foil gauge group (361), the second sensor body (362) and described second sensor body (362), the left and right extension of described second sensor body (362) inserts the inner chamber of its both sides crossbeam, described 3rd foil gauge group (361) is four foil gauges arranged along crossbeam horizontal direction 45 °, is pasted onto the middle part surface of described second sensor body (362).
6. the test unit of negative shedding cam face according to claim 1 and manufacturing accuracy, it is characterized in that: described second acceleration transducer (22) is fixed on the middle height of described heald frame (1) entablature, is 1/10th of described heald frame (1) length L apart from the spacing of shelves on the right side of described heald frame (1) entablature.
7. the test unit of negative shedding cam face according to claim 1 and manufacturing accuracy, it is characterized in that: in described bridge signal processor (25), comprise electric bridge supply voltage module (251), V/I amplifier (252), signal amplifier (253), demodulator (254) and calibration module (255), described electric bridge supply voltage module (251) is described first foil gauge group (17), described bend sensor (35) and described twist sensors (36) power supply, the output signal of described foil gauge group (17) is input to described signal analyzer (31) through described V/I amplifier (252) and described signal amplifier (253), described demodulator (254) is respectively at described electric bridge supply voltage module (251), described V/I amplifier (252) and described calibration module (255) connect, described calibration module (255) is connected with described signal amplifier (253).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092224A (en) * | 2015-06-23 | 2015-11-25 | 吴江万工机电设备有限公司 | Test device for shapes of passive type opening cams and manufacture precision |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105092224A (en) * | 2015-06-23 | 2015-11-25 | 吴江万工机电设备有限公司 | Test device for shapes of passive type opening cams and manufacture precision |
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