SU969392A1

SU969392A1 - Apparatus for producing threaded surfaces

Info

Publication number: SU969392A1
Application number: SU803214527A
Authority: SU
Inventors: Александр Николаевич Байков; Сергей Борисович Кондратьев; Валерий Филиппович Лукичев
Priority date: 1980-12-12
Filing date: 1980-12-12
Publication date: 1982-10-30

Description

Изобретение относится к обработке металлов давлением и, в частности, может быть использовано при чистовой обработке ходовых винтов.The invention relates to the processing of metals by pressure and, in particular, can be used in the finishing of lead screws.

Известна резьбонарезная головка, которая во время нарезания резьбы .вращается вместе с установленными в ней режущими инструментами, которые имеют профиль, соответствующий профилю нарезания резьбы £1].Known thread-cutting head, which during threading. Rotates together with the installed cutting tools that have a profile corresponding to the threading profile £ 1].

Недостатком указанной резьбонарезной головки является применение ее только для нарезания метрических резьб, недостаточная жесткость конструкции из-за консольного закрепления фрез и необходимость точной ори- . ентации заходов фрез.The disadvantage of this thread-cutting head is its use only for cutting metric threads, insufficient rigidity due to cantilever fastening of the cutters and the need for precise orientation. Orientation of calls of mills.

Известно также устройство для обработки наружной поверхности конца полой заготовки, содержащее корпус, опору, установленную в корпусе, два диска с центральными отверстиями, установленные на опоре, соединительные стержни, жестко закрепленные между дисками, и резьбонакатные ролики между дисками, расположенные на оси, установленной с возможностью вращения £2].It is also known a device for processing the outer surface of the end of a hollow billet, comprising a housing, a support mounted in the housing, two disks with central holes mounted on the support, connecting rods rigidly fixed between the disks, and thread rolling rollers between the disks located on an axis mounted with the possibility of rotation £ 2].

Однако с помощью известного устройства можно нарезать резьбу только на небольшом участке заготовки, кро ме того, в нем затруднена замена рабочего инструмента, необходимая для обработки различного вида резьб.However, using the known device, it is possible to cut the thread only in a small area of the workpiece, in addition, it makes it difficult to replace the working tool necessary for processing various types of threads.

Цель изобретения— повышение точности устройства.The purpose of the invention is to improve the accuracy of the device.

Поставленная цель достигается ,тем, что устройство для изготовления резьбовых поверхностей, содержащее 10 корпус, опору, установленную в корпусе , два . диска с центральными отверстиями , установленные, на опоре, соединительные стержни, жестко закрепленные между дисками, и рабочий . .с инструмент, расположенный между дис· ³ ками на оси, установленной с возможностью вращения, снабжено дополнительной опорой, установленной в корпусе, люнетом, расположенным на 2Q соединительном стержне диаметрально противоположно относительно рабочего инструмента, и втулкой, размещенной в центральном отверстии одного из дисков и жестко закрепленной в „ дополнительной опоре, причем диски выполнены в виде разъемных сегментов и установлены с возможностью вращения, а втулка кинематически связана с рабочим инструментом.This goal is achieved, in that the device for the manufacture of threaded surfaces containing 10 housing, a support installed in the housing, two. a disk with central holes mounted on a support, connecting rods, rigidly fixed between the disks, and a worker. .with a tool located between disks · ³ on an axis mounted for rotation, provided with an additional support mounted in the housing, a lance located on the 2Q connecting rod diametrically opposite to the working tool, and a sleeve located in the central hole of one of the disks and rigidly fixed in the “additional support”, the disks being made in the form of detachable segments and mounted for rotation, and the sleeve is kinematically connected to the working tool.

_ . На фиг. 1 изображено устройство, ⁵⁰ общий вид; на фиг. 2 - разрез А-А на фиг. 1} на фиг. 3 - вид по стрел? ке Б на фиг. 1; на фиг. 4 - разрез В-В на фиг. 1._. In FIG. 1 shows a device, ^{50 a} general view; in FIG. 2 is a section AA in FIG. 1} in FIG. 3 - view along arrows? ke B in FIG. 1; in FIG. 4 is a section BB of FIG. 1.

Устройство состоит из основания 1 которое установлено на поперечном суппорте 2 токарного станка и закреп лено в направляющих 3 суппорта. На основании 1 установлены и закреплены опора 4 и дополнительная опора 5 с дисками 6 и 7, жестко скрепленными между собой тремя соединительными стержнями 8, расположенными под углом 90’ друг к другу. В центре диска 7 установлена втулка с зубчатым колесом 9, которая жестко закреплена в дополнительной опоре 5. Диски.6 и 7 на фапцах 10 и 11 установлены на подшипниках 12 качения. Внутри цапф имеется сквозное отверстие 13, служащее для установки'заготовки 14.The device consists of a base 1 which is mounted on the transverse support 2 of the lathe and is fixed in the guides 3 of the support. On the base 1, a support 4 and an additional support 5 are installed and fixed with disks 6 and 7, rigidly fastened to each other by three connecting rods 8 located at an angle of 90 ’to each other. In the center of the disk 7 there is a sleeve with a gear wheel 9, which is rigidly fixed in the additional support 5. The disks 6 and 7 on the clamps 10 and 11 are mounted on the rolling bearings 12. Inside the trunnions there is a through hole 13, which serves to install the blank 14.

С двух сторон устройства расположены подвижные люнеты 15 и 16. Для закрепления рабочего инструмента 17 опорные диски 6 и 7 имеют сегменты 18 и 19, которые устанавливаются и закрепляются с помощью винтов 20. Пластины 21 и 22 служат для регулировки сближения рабочего инструмента $17 с изделием. Сегменты 18 и 19 сое^динены валом 23, на котором установялено и закреплено зубчатое колесо .124, находящееся в зацеплении через паразитное зубчатое колесо 25 с зубчатым колесом втулки 9. При этом зубчатое колесо втулки 9 и зубчатое колесо 24 имеют одинаковые диаметры с равным числом зубьев. Для сохранения постоянства размеров сближения сегменты закреплены с двух сторон стержнями 26. На валу 23 имеется шпонка 27, обеспечивающая жесткое закрепление инструмента от поворота. На противоположном от инструмента стержне 8 закреплен вращающийся люнет 28, служащий для предотвращения отжима изделия в процессе обработки. Один конец заготовки 14 закреплен в патроне 29, другой поджат задним центром задней бабки станка (не показан). Для осуществления вращения инструмента имеется шкив 30, закрепленный на цапфе 11 с помощью шпонки 31 и соединенный клиноременной передачей 32 со шкивом 33 на валу электродвигателя (не показан).Moving lunettes 15 and 16 are located on both sides of the device. To fix the working tool 17, the supporting disks 6 and 7 have segments 18 and 19, which are mounted and fixed with screws 20. The plates 21 and 22 serve to adjust the proximity of the working tool $ 17 to the product. Segments 18 and 19 are connected by a shaft 23 on which a gear wheel .124 is mounted and engaged through a spurious gear 25 with a gear wheel of the sleeve 9. The gear wheel of the sleeve 9 and the gear 24 have the same diameters with the same number teeth. To preserve the convergence of the convergence sizes, the segments are fixed on both sides by rods 26. On the shaft 23 there is a key 27, which provides a rigid fixation of the tool from rotation. On the rod 8 opposite from the tool, a rotating rest 28 is fixed, which serves to prevent the product from spinning during processing. One end of the workpiece 14 is fixed in the chuck 29, the other is tightened by the rear center of the tailstock of the machine (not shown). To implement the rotation of the tool there is a pulley 30, mounted on the pin 11 with a key 31 and connected by a V-belt drive 32 with a pulley 33 on a motor shaft (not shown).

Устройство работает следующим образом.The device operates as follows.

Через свободное отверстие 13 устанавливается заготовка 14 с предварительно накатанной или нарезанной резьбой. Один конец заготовки закреплен в патроне 29, другой поджат задним центром. Инструмент 17 устанавливается вместе с сегментами 18 и 19 на дисках би 7. Для установки инструмента на размер обработки подбирают компенсирующие промежуточ? ные мерные пластины 21 и 22, кото рые обеспечивают размер обработки. При включении электродвигателя вращение передается на вал шкива 33 и через клиноременную передачу 32 сообщается шкиву 30, соединенному цапфой 11 с диском 6 и через три соединительных стержня 8 с диском 7. В свою очередь зубчатое колесо 24, которое установлено на валу 23, через паразитное зубчатое колесо 25 находится в зацеплении с неподвижным зубчатым , колесом втулки 9. Таким образом, обеспечивается планетарное вращение инструмента 17 относительно обрабатываемой заготовки 14. С противоположной стороны относительно инструмента закреплен вращающийся люнет для предотвращения отжима заготовки и балансировки устройства. Для продольного перемещения заготовки включают ходовой винт от токарного станка, и таким образом по всей длине резьбовой части обрабатываемого винта происходит удаление погрешностей предварительной обработки.Through a free hole 13, a workpiece 14 with pre-knurled or threaded thread is installed. One end of the workpiece is fixed in the cartridge 29, the other is tightened by the rear center. Tool 17 is installed together with segments 18 and 19 on bi-7 drives. To set the tool to the processing size, compensating intermediates are selected? dimensional measuring plates 21 and 22, which provide the processing size. When the motor is turned on, the rotation is transmitted to the pulley shaft 33 and through the V-belt drive 32 it is communicated to the pulley 30 connected by a pin 11 to the disk 6 and through three connecting rods 8 to the disk 7. In turn, the gear wheel 24, which is mounted on the shaft 23, through the spurious gear the wheel 25 is meshed with the stationary gear wheel of the sleeve 9. Thus, the planetary rotation of the tool 17 relative to the workpiece 14 is ensured. On the opposite side relative to the tool, a rotating I lunette to prevent spinning preparation and balancing device. For longitudinal movement of the workpiece, the lead screw from the lathe is turned on, and thus, the preprocessing errors are removed along the entire length of the threaded part of the screw being machined.

Предлагаемое устройство по сравнению с прототипом позволит устранить биения резьбовой поверхности на термически необработанных ходовых винтах, при этом уменьшаются погрешности шага улучшаются механические свойства поверхности резьбы. Рабочая поверхность профиля резьбы вследствие малого съема припуска при шлифовании имеет меньше вероятности получения микротрещин, прижогов за счет снижения режимов шлифования, сохраняет требуемую поверхностную твердость профиля резьбы (HRC 58-60), Испытания показали, что точность и производительность применения.предлагаемого устройства для формообразо- . вания резьбовой поверхности увеличится в 2-3 раза.The proposed device in comparison with the prototype will eliminate the runout of the threaded surface on thermally untreated lead screws, while reducing pitch errors improve the mechanical properties of the thread surface. The working surface of the thread profile due to the small removal of the allowance during grinding has less likelihood of microcracks, burns due to lower grinding conditions, it retains the required surface hardness of the thread profile (HRC 58-60). Tests have shown that the accuracy and performance of the proposed device for shaping . threaded surface increases by 2-3 times.

Claims

in fig. 1} in FIG. 3; a view along arrow B in FIG. one; in fig. 4 shows a section B-B in FIG. 1. The device consists of a base which is mounted on a transverse support 2 of the lathe and is fixed in the guides 3 of the support. On base 1, support 4 and additional support 5 are mounted and fixed with disks 6 and 7, rigidly fastened with three connecting rods 8 located at an angle of 90 ° to each other. In the center of the disk 7 there is a sleeve with a gear wheel 9, which is rigidly fixed in the additional support 5. The disks 6 and 7 on the fas 10 and 11 are mounted on rolling bearings 12. Inside the trunnions there is a through hole 13, which is used to install the blank 14. On either side of the device are movable lunettes 15 and 16. To secure the working tool 17, the support disks 6 and 7 have segments 18 and 19, which are fixed and fixed with screws 20. Plates 21 and 22 serve to adjust the approach of the working tool al7 with the product. Segments 18 and 19 soybeans | are connected with shaft 23 on which a gear wheel is mounted and fixed. 24, which is engaged through a parasitic gear wheel 25 with a gear wheel of sleeve 9. In this case gear wheel of sleeve 9 and gear wheel 24 have the same diameters with an equal number of teeth. To maintain the same size of the approximation, the segments are fixed on both sides by rods 26. A key 27 is provided on shaft 23, ensuring that the tool is rigidly secured against rotation. A rotating rod 28 is attached to the shaft 8 opposite to the tool, which serves to prevent the product from spinning during machining. One end the workpiece 14 is fixed in the chuck 29, the other is tucked in the rear center of the main stock of the machine (not shown). To implement the rotation of the tool, there is a pulley 30 fixed to the trunnion 11 by means of a key 31 and connected by a V-belt transmission 32 to the pulley 33 on an electric motor shaft (not shown). The device works as follows. Through the free hole 13, the workpiece 14 is installed with pre-rolled or threaded threads. One end of the workpiece is fixed in the chuck 29, the other preloaded by the rear center. The tool 17 is installed together with the segments 18 and 19 on the disks 6 and 7. Dp the tool installation on the size of processing select compensating intermediate measuring plates 21 and 22, which provide the size of processing. When the motor is turned on, the rotation is transmitted to the shaft of the pulley 33 and, via the V-belt transmission 32, the pulley 30 connected by the trunnion 11 to the disk 6 and through three connecting rods 8 to the disk 7 is connected. In turn, the gear wheel 24 which is mounted on the shaft 23 the wheel 25 is in engagement with the stationary gear wheel of the sleeve 9. Thus, the planetary rotation of the tool 17 relative to the workpiece 14 is ensured. On the opposite side relative to the tool is fixed rotate iys backrest to prevent the blank pressed and balancing device. For the longitudinal movement of the workpiece, the lead screw from the lathe is turned on, and thus, over the whole length of the threaded part of the screw being machined, one of the preprocessing errors occurs. The proposed device, in comparison with the prototype, will allow to eliminate the beating of the threaded surface on thermally untreated chassis screws, with electronic errors, the pitch errors are improved and the mechanical properties of the thread surface are improved. The working surface of the thread profile due to the small removal of the allowance during grinding has less probability of getting microcracks, burns due to reduced grinding conditions, retains the required surface hardness of the thread profile (HRC 58-60). Testing showed that the accuracy and productivity of the proposed device for shape image. The thread of the threaded surface will increase 2-3 times. The invention The device for the manufacture of threaded surfaces, containing cor-. Pus installed in the housing support with two discs having a centric hole, connecting rods rigidly fixed between the discs, and a working tool placed between the discs on an axis located rotatably, characterized in that, in order to improve accuracy, it is provided with an additional a support mounted in the housing, a lunette located on the connecting rod diametrically opposite to the working tool, and a sleeve placed in the central hole of one of the discs and rigidly closed repainted in the support, and the disks are made in the form of detachable segments and installed

5969392

6 possibility of rotation, and the sleeve ki 1, USSR Copyright Certificate

nematic associated with the working tool - 87733, cl. At 23Q 5/00, 1959. cop.

2. Authors Certificate of the USSR

Sources of information, 653013, cl. B 21 N 3/04, 10/05/77

taken into account in the examination (prototype).

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