SU1269956A1 - Machine for working articles - Google Patents

Abstract

MACHINES FOR PROCESSING EQUIPMENT, mainly for coating them, containing a frame on which we clamped and rotated parts, guides, a carriage mounted on guides, a spindle with a reversing mechanism and a splined shaft, kinematically connected with a rod. the mechanism of rotation of the part and connected to the carriage, as well as the caliper lateral movement of the working body, for example, a detonation-pulse gun, characterized in that, in order to expand technological capabilities by Ensuring the processing of crankshaft journals of a large range of sizes without using centrifugal mixers, the machine is equipped with a tracking mechanism, made in the form of a housing mounted on a carriage, two parallel in the housing crank shafts, kinematically connected with each other with the possibility of synchronous rotation and with a splined shaft, plate, mounted on a crooked (L spikes crank shafts, a counterweight mounted on one of the crank shafts, while the caliper with the working body attached to the plate its mechanism.

Description

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The invention relates to a device for applying a layer of metal in the restoration and manufacture of parts having surfaces of rotation, mainly crankshafts, and can be used for coating by detonation by the method of gas-thermal spraying: by electric arc and gas nanowires.

In addition, the device can be used for surface hardening of parts by means of shot blasting and sandblasting the surface.

The aim of the invention is to distribute the technological capabilities of the machine by providing processing of crankshaft connecting rod necks without using centrifugal mixers.

FIG. 1 shows the kinematic diagram of the machine; in fig. 2 - tracking mechanism; in fig. 3 - scheme of setting and operation of the flock.

The coating machine consists of a frame 1 on which a part clamping mechanism is installed, including a self-centering three-jaw chuck 2 and a tailstock 3, a mechanism for rotating parts 4, guides 5, a carriage 6 on which, by means of tracking mechanisms 7 and a lateral movement support 8, an operating device is installed, for example, a detonation-impulse starter 9, stops 10 and 11 of the limit switch 12 mounted on the carriage 6.

On the output shaft 13 of the rotation mechanism of the part 4, sprockets 14 and 15 are rigidly fixed.

The sprocket 14 is connected by a transmission 16 to a driven sprocket 17 mounted on a shaft 18 connected via a coupling 19 with a screw pair 20 of a screw pair, the nut 21 of which is mounted on a carriage 6. On a screw 20 an asterisk 22 is fixed, which is connected with an asterisk through gear 23 24 of the reversing shaft 25, connected through a muffta 26 with an asterisk 27, the input sh. S in engagement with the external side of the driven branch of the transmission 16.

An asterisk 15 through the transfer of 28 cf. with an asterisk 29 mounted on the shaft 30 connected via a coupling 31 s: on the slider shaft 32, which engages Ei gearing with the slider nut 33, fasten it to the carriage 6. On the nut corn 33 there is an asterisk 34, which is connected via a 35 s gear the crankshaft shaft 36 installed in the housing 37 of the tracking mechanism 7. The shaft 36 is gear-driven (gereda and 38 is kinematically connected by means of an asterisk 40 to another crank shaft 39 of the tracking mechanism 7. On the side of the asterisk 40, a counterweight 41 is installed on the shaft 39 from the housing 42

(Fig. 2), a guide 43, a screw 44, terminated by a handle 45 and a load 46.

At the other ends of the shafts 36 and 39, the master 47 and slave 48 crankshafts are mounted.

(Fig. 1).

The lead crank 47 consists of a body 49 (Fig. 2), a guide 50, along which a slider 53 moves along a screw 51, ending with a handle 52,. The driven crank 48 consists of a body 54,

guides 55 and slider 56. A plate 59 is mounted to the free ends of the sliders 53 and 56 by means of bearings 57 and 58, on which a transverse movement support 8 (Fig. 1) with a detonation-impulse trigger 9 is fixed.

The lateral movement support 8 consists of a bracket 60 (Fig. 2) fixed on a plate 59, a slider 61 mounted on rails 62, a screw 63 terminated by a handle 64.

The coating system, in particular, by the detonation method works as follows.

The crankshaft 65 is mounted in a three-jaw chuck 2, pressed

center of the tailstock 3 and clamped. Depending on the eccentricity H (Fig. 3) of the crankshaft connecting rod pivots 65, turning the knob 52 adjusts the rotation radius R of the slider 53. The radius R should be equal to the eccentricity of the crankshaft crankshaft neck, i.e. H R.

To balance the rotating masses of the nodes mounted on crankshafts 47 and 48, the counterweight 41 is designed. To adjust the radius RI of the load rotation 46, use a screw 44. The radius R is associated with the radius R of the rotation of the slide 55 by the following relation

R, Rf

Vi

where Q is the weight of the cranks rotating

49 and 50 mechanisms, N; Qi - weight of cargo, N

Depending on the powder and gas mixture used for spraying the coating, rotation of the handle 64 sets

coating distance L By moving the lugs 10 and 11 (Fig. 1), set the width B of the applied coating corresponding to the width I of the sprayed crankshaft jaw.

When the drive of the rotational mechanism 4 is turned on, torque is transmitted to the output shaft 13 and the crankshaft associated therewith. Through the gear 16, the shaft 18 and the clutch 19, the rotation is transmitted to the screw 20. the moving carriage 6 along the guides 5 along the crankshaft. Through the gear 28, the clutch 31 rotation is transmitted to the splined shaft 32, through which the sprocket 34 interlocking with the shaft 36 is mixed.

the tracking mechanism 7 by means of a transmission 35. The rotation of the shafts 39 and 36 is synchronized by a gear 38. When the shafts 36 and 39 rotate, the plate 59 rotates, connected with them through crankshafts 47 and 48. The open end of the barrel of the detonation-pulse 9 describes the circumference R, given by crank 47, repeat the trajectory of the crank rod crankshaft 65. At the same time, the distance to applying the coating L remains constant at any moment in time.

After the carriage 6 travels a distance B equal to the width E of the crankshaft surface sprayed, the stop 11 communicates with a limit switch 12 which disconnects the clutch 19 and turns on the clutch 26. The rotation of the screw 20 through the shaft 25 and the gear 23 is reversed. The carriage 6 changes the direction of travel. When the limit switch interacts with the stop 10, the coupling 26 is disconnected and the coupling 19 is turned on. The cycle is repeated.

In order to process the next crankpin of the crankshaft 65, the stops 10 and 11 are set to a different position.

For processing the crankshaft crankshaft 65 or other cylindrical parts, the tracking mechanism 7 is turned off by means of the coupling 31.

To coat the crankshaft crankshaft fillet, i.e. to obtain the ring by clutches 19 and 26, the screw 20 is turned off, the tracking mechanism is turned on.

To coat the crankshaft crankshaft fillet, turn off the tracking mechanism 7 and screw 20 by turning on the sleeves 31, 19 and 26, respectively.

For example, when machining a diesel engine ZA-6D49, in which the eccentricity of the crank journals is mm, the crank neck width is R 140 mm per 5, the detonation coating unit is designed as follows: by rotating the handle 52, the rotation radius 53 is set: R 130 mm : moving the stops 10 and 11 set the width of the applied coating: B 140 mm;

0 depending on the powder used in the gas mixture, turning the knob 64 sets the detonation of the coating, for example, L 180mm; determine the radius of the impact of the load 46 by the formula

R ,,

where Q 800 N and Qj 1000 N are constant values for this installation,

then R, 130jf2- i04 mm;

rotation of the handle 45 sets the rotation radius of the load 46: Ri 104 mm.

When turning on the drive of the rotation mechanism of the part 4, the carriage 6 moves

5 within a distance of 140 mm bounded by lugs 10 and 11. The open end of the detonation-pulsed trigger 9 in a vertical plane defines a circumference of radius R 130 mm given by the setting of the slider 53 of crank 47. The distance from the surface of the sprayed part at any time time remains unchanged L 180 mm.

The use of the invention makes it possible to apply a metal layer on the main and connecting rod crankshaft necks of a large

5 ranges of sizes in various ways, allows you to increase productivity.

Claims (1)

MACHINE FOR PROCESSING PRODUCTS, mainly for coating them, containing a frame on which the mechanisms of clamping and rotation of the part are mounted, guides, a carriage mounted on the guides, a running screw with a reversing mechanism and a spline shaft kinematically connected with the spindle of the part rotation mechanism and connected to the carriage, as well as the support for the transverse movement of the working body, for example, a detonation-pulse gun, characterized in that, in order to expand technological capabilities by providing processing of crankshaft necks of a large range of sizes without the use of centrifugal mixers, the machine is equipped with a tracking mechanism made in the form of a housing mounted on a carriage, two parallel-mounted crank shafts in the housing, kinematically connected to each other with the possibility of synchronous rotation and with a splined shaft, a plate mounted on the cranks of the crank shafts, a counterweight mounted on one of the crank shafts, while the caliper with the working body is fixed on the plate of the follower mechanism. SU „, 1269956>