Bevel & Worm Gear Testers, Single Flank Measuring Systems Worm Gears / Bevel Gears, Roll Testers, Mumbai, India

Bevel & Worm Gear Testers


	Single Flank Measuring Systems Worm Gears

	Worm gearing test by single flank rolling method

	Test with single flank rolling determine inaccuracy of rotating movement of worm gearing as during working condition. The test will be made separate on the right and left tooth face. When inaccuracy of rotating movement will be smaller, the gearing will be precise. Single deviations which we get from this testing are describe in DIN 3975 standard and this leaflet.

	General characteristic of instrument

	The gear tester is designed for workshop and laboratory use. Gearing accuracy is evaluated by single flank rolling method with PC data processing (results on the screen, printing protocol). Results of measuring are classified to accuracy class, according to DIN 3974-2. Results can be transferred to the own standard by writing directly numerical deviations value to PC. You have also possibility mark individual tooth with color. Worm drive electromotor can change revolution by step directly from PC.

	Method of testing measured data (deviations)

	For single flank rolling test is worm with worm wheel located in nominal mutual position i.e. in specified distances of axes, axis of worm must be in middle plane of worm wheel which guarantee tooth backlash. The worm is driven by low revolution (approx.1 rev./1sec.) and worm wheel is slightly braking for maintain of meshing on one (or second) side of tooth. The degree of precision is determined as per no-uniform revolutions of worm wheel with no-uniform revolutions of worm.

	In principle it is possible to measure by the Gear Tester deviations of individual parts of gearing i.e. worm and worm wheel in mesh with master worm wheel and master worm. Usually is measured meshing worm and worm wheel i.e. the general practice of principle so called ?coupling? of gearing is applied.

	Possibility of deviations measuring according DIN 3975 standard. Fi´ - step of single flank rolling per mesh cycle fi´ - step of single flank rolling per pitch Fp´ - deviation of single flank rolling per mesh cycle By filter off deviation Fp´we receive further display of course with characteristic errors in mesh individual meshing pairs of teeth.
	fp´ - deviation of single flank rolling per mesh cycle

	In case of inconvenient result or if we request the best gearing mesh and if exists possibility of another gearing positioning (i.e. marked thread of worm give in mesh with another then original marked tooth of worm wheel) the instrument will signalize such possibility. (For information: large number of possible positioning of worm and worm wheel exists subject to numbers of teeth z1, z2 are divisible. In case of no-divisible constellation z1, z2 the starting position is arbitrary because each worm thread to mesh with all teeth of worm wheel. The same gearing constellation is for on-thread worm.).

	Software equipment

	Measuring and control program use WINDOWS 98

	The main control program allows :

	use in shop environment in short time to process and display measured data by means of a special SW classify tested worm gearing blocking of individual tester functions by password selection of angle measure in base mode (XX?XX´XX?) or in decimal mode (XX, XXXX°) program allows display of tolerance and regulation limits by means of colour lights: red - out of tolerance yellow - out of regulation limit green - OK
	Such presentation is valid for all deviations and it serve for quick orientation of operator
	measuring of gearing: for receiving of deviations of single flank rolling according to chapter. ?Principle of measuring? and according to values to classification into class of accuracy according to DIN 3974-2, it is respected the fact that it is measured of gearing and dependence of numerical values in allowed limits. Before starting of measuring it is possible to select the class accuracy for measured gearing. With respect to preselected values the gearing is evaluated - over crossing tolerance is signalized by colour lights on monitor and by special red text and by special text on protocol instead of class accuracy it is possible to determine the own deviations values recall from databank the parameters of measured gearing including the result and graph adjustment of communication version on monitor for testing and print of protocols standard language: Czech, German and English, the other versions are delivered as optional equipment adjustment of print of testing protocol in various sizes - black and white, colour version reversed scanning of tested signal by so-called FFT analysis to a spectrum of individual harmonic units - the data can be compared with before measured spectrum of selected gearing by means of inserting so caller limit curve to look thought a testing record tooth by tooth to exit and storage of test results in a form for further working by means of program SPC for quality control (special equipment)

	Single Flank Measuring Systems Bevel Gears

	The test of bevel gearing by single flank method

	The test by single flank method determines inaccuracy (uneven) of transmission of rotary motion of bevel gearing in the same conditions as in practise. The test is made separately on right and left teeth sides. The sides of teeth which are not in mesh are separated by side clearance. When the uneven transmission of rotary motion is lower then the gear (gearing) is more accurate. Individual deviations which are received by this test are described in DIN 3965 standard and in this leaflet.

	General characteristic of instrument

	The gear tester DO 2 K PC is determined for deviations measuring of bevel gearing by single flank rolling method with PC evaluation according to DIN 3965 standard. Using of precision linear and rotation encoders guarantee high precise scanning of measuring value. Testing with colour it is possible also.We use MICROCON electric drive for this instrument which have possibility change revolutions in steps and controlling from computer directly.

	Measuring method

	Pair of bevel gear let mesh together, mutual position will be determined according to pinion and crown gear assembly distance. As for bevel gears it is very difficult to produce of master gears, we will test both meshing gears which will be used as pairing gears (coupling). In this cycle are evaluated the deviations of angle of crown wheel (recalculated on arc outside pitch circle of wheel and define in mm) from its theoretical angle position define angle position of pinion and gear ration.
	Fi´ - step of single flank generating per mesh cycle fi´ - step of single flank generating per pitch Fp´ - (resp Fp´ according to DIN 3971)deviations of single flank generating per mesh cycle. By filter of deviation fl´ we receive further display of course with characteristic errors in mesh individual meshing pairs of teeth: fk´ (resp. fp´ according to DIN 3971) - deviations of single flank generating per pitch. In same case of mesh cycle each teeth of pinion mesh with all teeth of crown gear. In such case the start positioning is not important. It happened if the number of pinion teeth and crown gear is no-divisible. In the other cases (if the numbers of teeth are divisible) during mesh cycle the determined teeth of pinion is not in mesh with all teeth of crown gear. In such case exist more numbers of meshing cycles e.i. more numbers of possible starting mutual teeth positioning. The instrument will inform you and determine the further possibilities of positioning.

	The important part is regressive analysis of measured signal by means of so called FFT analysis into spectrum of individual elements. After measuring will known "correct" gearing, which is verified in processing, it is possible to store such gearing into program as so called limit curve and determine and compare the quality further gearing accordingly.

	Software equipment

	Measuring and control program use WINDOWS?.

	The main control program allows: using in current workshop and it is adapted for operator also in short time to process and display measured data of single flank generating by means of a special SW classify tested bevel gearing according to deviations single flank generating blocking of individual tester functions by password for preventation of no-quality action selection of angle measured in base mode (xx°xx´xx?) or in decimal mode (xx.xxxx°), program allows display of tolerance and regulation limits by means of colour lights: red - out of tolerance yellow - out of regulation limit green - OK

	Such presentation is valid for all deviations and it serve for quick orientation of operator.

	measuring of gearing: for receiving of deviations of single flank rolling according to chapter. "Principle of measuring" and according to values to classification into class of accuracy according to DIN 3965 it is respected the fact that it is measured of gearing and dependence of numerical values in allowed limits.

	Before starting of measuring it is possible to select the class accuracy for measured gearing. With respect to preselected values the gearing is evaluated - over crossing tolerance is signalized by colour lights on monitor and by special red text on protocol.

	recall from databank the parameters of measured gearing including the result and graph adjustment of communication version of monitor for testing and print of protocols: standard language: Czech, German and English, the other version are delivered as optional equipment adjustment of print of testing protocol in various sizes - black and white, colour version reversed scanning of tested signal by so-called FFT analysis to a spectrum of individual harmonic units - the data can be compared with before measured spectrum of selected gearing by means of inserting so caller limit curve. to look thought a testing record tooth by tooth

	to exit and storage of test results in a form for further working by means of program SPC for quality control (special equipment)to reserve measured data on external medium

	[ Back To Top ]