SU921712A1 - Machine tool for working crank shaft connecting rod necks - Google Patents

Description

one

The invention relates to a machine tool industry and can be used in the automotive, tractor industry for machining crankshaft crankpins.

A machine for processing several coaxial crankshafts of a crankshaft 5 shaft is known, which contains headstocks with spindles, an instrumental headstock with faceplates and ring tools eccentrically installed in the latter, a separating head mounted on one of the headstock, and the faceplates are aligned with each other and with a common the axis of symmetry of the machined connecting rod necks, and the number of ring tools equal to the number of simultaneously machined connecting rod necks 1.ts

The disadvantages of the known machine are low productivity and machining accuracy (the latter is due to the angular position of the axles of the connecting rod necks).

The purpose of the invention is to increase the productivity and accuracy of processing.

This goal is achieved by the fact that the hole for the annular tool in each faceplate is made with an eccentricity equal to the radius of the corresponding crank of the oooted crankshaft. each faceplate is mixed relative to another by the radius of the product crank, and the faceplate and the headstock spindle are equipped with kinematically connected rotational drives, with the gear ratio between the placive and the spindle drives being one.

FIG. 1 shows the proposed machine, a general view; in fig. 2 - section aa

FIG. 3 - section B - B in FIG. one:

on

in fig. .

Machine

contains frame 1, headstock 2. 3, spindles 4, workpiece with product 5, tool heads 6. mounted on the frame with the possibility of moving, body 7 of the longitudinal

rykh, in turn, are installed on carriages 8 with the possibility of a transverse reuse. In the housing 7, but under the chargers, the faceplates 9 are installed, in the eccentric bores which the ring tools 10 are mounted. The number of ring tools is equal to the number of simultaneously processed connecting rod cheeks. 14 faceplates and one spindle 4 headstocks. One of the directions of the specified bidirectional kinematic peppa contains a gear wheel 12 and an outer gear ring of the faceplate 9, the other is a gear wheel 12 and a gear gear (FIG. 2 stroke-x-dotted) to one of the spindles 4. cinematic chains are equal to each other. Each ring tool 10 is rigidly connected to the gear wheel 15, which interacts with the corresponding internal gear of the three-crown gear wheel 16, the outer ring of which interacts with the gear wheel 17 of the drive 18 ring tools. The machine also contains a drive and a drive 19 of the lateral feed 1Ia plunging and accelerating the course of the transverse ii longitudinal tool; 1p 1x attendants and luft 20.

Machine-works in the following m-way. Using the actuator 19, instrumentalization of the headstock 6 is retracted to the extreme left and right position, respectively. This frees up the space between the heads 2, 3 nzdeli 51, in pl-c x 4 which then h ;; crp, 1 along the main journals to process the first product 5. Next, using the drive 19, mix the system: Mentalp1, 1 i grandma, thereby entering the processed product .. 5 into the cavity of the co-fatigue tools GG 10. At the same time, the faceplate with ring attachments ITA.MI (each of the faceplates) are mounted with the connecting rod 1MIKI 11 to be machined, i.e. (| ) The position of the chain of symmetry of each ring tool corresponds to the phase position with After that, the carriages 8 are fixed on the bed 1, the drive 18 is turned on, and the rotational gear is rotated through the three-crown gear 16. At the same time, the crank tools of the edge are around their geometrical axes. Simultaneously with the drive 18 The drive 9 is switched on, thanks to which the instrumental heads 6 are mixed in the cross section of the alphabet leshl-sh, which ensured the penetration of the ring tools 10 into the machined connecting rod connecting rod 11. Upon reaching the T11-booted r ... | ivod 19 disconnected, Kopriyca 7 kistrumentalnyh Babol 6 (cl riksir relatively carriages 8,

include the drive 14 of the faceplate and one of the psiidel 4 headstock product. In this case, by means of a bidirectional kinematic chain 13, vrashipy simultaneously communicates, plants, aybam 9 and, through one of

spindles 4, the workpiece 5. Thus, each ring tool 10 rotates with the plash 9 around its axis and around its geometric axis at the same time,

processing according to the crank neck and cheeks.

The required diameter of the connecting rod journals is obtained in one turn of the chuck and the workpiece.

At the end of the processing, the instrumental heads 6 are fixed, by means of the actuator 19, moving in the transverse and longitudinal directions, returned to the extreme and left and right position, respectively, removing the processed article 5 from the machine

securing the next product, securing the next product to be processed, rioc; i.e., which repeats the cycle.

The machine makes it possible to machine several crankshaft necks, split; single shafts on different axes (non-axial crank arms), to increase the productivity and accuracy of processing.

Claims (1)

Invention Formula A machine for machining the crankshaft crankshaft journals, containing headstock, spindles, tool headstock with faceplates and ring tools eccentrically installed in the faceplates, characterized in that, with the purpose of performance and accuracy of machining, the eccentricity of the ring tools installation is equal to the radius the crankshaft of the workpiece, the rotation axes of the plate b are mixed relative to each other by the size; 1, the radius of the crank of the product, or the plagi-nuts and the t.1 pindle of the workhead; ki bonded 11ezhdu a rotary drive, wherein 1eredatochioe otnop; eiie kinematic chain between drive and pla 1ilayb plshndel equal to unity. Sources of information taken into account in the examination I. Patent of Germany, No 2551250. cl. In 23 of 3/06, published. 1978