SU1579656A1 - Arrangement for cutting curvilinear sheet parts - Google Patents

Abstract

The invention relates to the processing of metals by pressure and can be used to cut curved sheet metal parts, such as braid blades. The purpose of the invention is to increase productivity and improve the quality of the resulting braid blades. The rollers of the device for moving the material are cantilevered, and the upper roller has adjustable pressure on the product. The rollers are made as follows: the top one - with a copying element and shoulder, the bottom one - with a copying element, chamfer and teeth at an angle of 2-4 ° to its axis. The rollers rotate the product during trimming, and the cutting heads with knives are offset so that the starting point of the cut is on the axis of the rollers. The rollers have a rotational speed greater than the knives. The receiving conveyor-conveyor is located in the zone of exit of the product from under the rollers. 1 hp f-ly, 13 ill.

Description

The invention relates to the processing of metals by pressure and can be used to cut curved sheet metal parts, such as braid blades.

The aim of the invention is to increase productivity and improve the quality of the parts produced.

FIG. 1 shows a device for cutting curved sheet metal parts, a general view; in fig. 2 - the same, top view; in fig. 3 - view A in FIG. 1; in fig. 4 — node I in FIG. one; in fig. 5 is a scan of the upper roller of the part supply unit; in fig. 6 is a scan of the lower roller of the part feed unit; in fig. 7 is a section BB in FIG. four; in fig. 8 is a view of B in FIG. four; in fig. 9 - section G-Y in FIG. one; in fig. 10 - preparation of the braid; in fig. 11 - lower roller; in fig. 12 is a view of D in FIG. eleven; in fig. 13 is a view E of FIG. eleven.

A device for cutting curvilinear sheet parts of the braid blades contains plate 1 and two pillars welded to it. The gearbox 3 is fixed to the plate with an electric motor in a V-belt drive. into which a shaft is inserted, the axis of which is located on the axis of the shaft of the gearbox with the coupling half. On the shaft, with the help of keys, she is wearing the other half-coupling 5, which moves freely on the shaft and keys. In this coupling half, holes are made into which the compression springs 6 are inserted, abutting against the end plane of the brake disc 7 fixed rigidly on the shaft. On the brake disc, the brake belt 8 is tensioned, the brake disc and shaft are constantly braking. A rigidly shaped ring 9 is dressed on the second half coupling, on the front surface of which a radial projection is made. A clamp 10, which is moving in a housing mounted on a bracket with a plate rotating in its upper part, is pressed to the end surface of the radial projection. In the lower part of the clamp, a lever 11 is inserted into its groove using a finger

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Ca attached to the rack. At the other end of the lever, a tension spring 12 is fixed, which constantly holds the lock in the upper position.

To the lever with the help of a finger is fixed the core of the electromagnet 13, which is attached to the bracket plate. A parasitic gear is rigidly mounted on the shaft, which transmits the rotation of gear 14. This gear is rigidly mounted on a shaft that is mounted on a bearing with housings welded to the uprights. At the other end of the shaft is dressed with a key and nut the lower feed roller 15, rotating at a speed Vi, which is made in the form of a sector, on which there is a copying element, made in the form of a wedge with Nchax face and teeth on its outer circumference at an angle of 2 -4 ° to the axis of the roller. This angle is made depending on the length of the product of the braid, i.e. the longer the braid, the smaller the angle.

The design of the product - braids is constructed as follows. Conduct radii

(K, RHOM, Kmaks) ON THE MOVING CROSS VALVE, ZETM

built n pc. The decreasing dimensions (f, q and i) are deposited from the resulting curve at lengths determined between them and draw a smooth curve through the end points of these dimensions, which is the scythe blade. On the copying element these dimensions are taken into account.

In the upper part of the uprights, vertical grooves are made into which are inserted with round protrusions-hangers of the bearing housing 16c. An upper shaft is inserted in them, at one end of which a gear is rigidly fixed, which engages with the gear of the lower shaft. Rectangular buffer rubber plates 17 are placed on the bodies and pressed by screws 18 through plates fixed to the posts. At the other end of the upper shaft, the upper feed roller 19 is dressed and secured with a nut. It is made in the same way as the lower roller in the form of a sector on which the copying element with a shoulder 20 is mirrored to the lower roller, which during rotation directs and presses the pickaxe under the yil along arrow R. In the stands of the bed, L-shaped grooves, 21, are made into which are inserted and fixed on both sides with the help of special washers 22 and bolts of the upper and lower adjustment heads, respectively, with the upper 23 and lower 24 knives. These heads on their bodies have on both sides square protrusions, in which threaded holes are made. Square protrusions serve to guide and precisely fix them in the G-grooves. The upper head with a knife is adjusted along the horizontal axis with a screw bush, which locks it with a nut, to sample the gap between the upper and lower blades. Cutting heads are offset from

0

the vertical axis of the feed rollers by the amount S, so that the point O of the beginning of the cut is on the contact line of the upper and lower feed rollers. When regrinding

knives their diameter is reduced, so the bracket is welded to the rack with a plate, in the lower part of which there is an electric motor with a V-belt drive, and a chain variator 25 is fixed on the plate, which increases the speed. An asterisk is mounted on the output shaft of the variator, able to move along the shaft and stop with a screw. She is wearing a chain 26, which transmits rotation through the windows in racks with an asterisk 27 of the upper head and an asterisk

28 of the lower head through the tension device 29 with its asterisk 30. The tension device has a tension bolt and bolts securing it to the rack.

To tension the chain of the second variator without a tension device, i.e., through

The sprocket of the upper head, the tension is produced by a chain variator. The speed of rotation of the upper and lower rollers is equal to Vi, the speed of rotation of the knives V2 is less than the feed rollers by

5 differences between the length of the butt curve and the curve of the blade of the braid. For the entry of the web of the blank of the braid between the rollers to the knives in the upper and lower rollers, the flats are formed, forming a gap Z between them. An electric control pedal 31 is provided for turning on the electromagnet. In order to receive the trimmed spit in the exit zone from under the rollers, the receiving conveyor 32 is angled.

The device works as follows. For trimming the edge on the workpiece of this braid, the upper and lower shafts are put on and tightened with nuts by the upper 19 and lower 15 feed rollers. Screws 18 establish the desired pressure required to move and turn the spit gate during trimming. Common start button includes electric motors. Through a V-belt transmission, chain variator 25, chain transmission 26, the rotational movement is transmitted to the sprockets 27 and 28 and the tension device 29 with an asterisk

5 30 through the shafts of the upper and lower cutting heads, respectively, with the knives 23 and 24 moving at a speed W The blank is inserted forward into the gap Z. When the control pedal 31 is pressed, the core of the electromagnet 13 is pulled into

0 him, lift the lever 11 behind him, and stretches the tension spring 12. The other end of the lever through the axis of the rack and the axis of the latch 10 moves it down the body. The rotating head of the latch 10 disengages from the end surface of the radius of the protrusion of the ring 9 downwards. At this moment, the compressed springs 6 abut against the face plane of the brake disc 7, unclenched, press on the coupling half 5,

which, on the shaft and keys, moves to the half coupling 4 and enters the grooves of the coupling half 4 with its teeth. The coupling half 5 and the shaft begin to rotate. The electric field does not act on the core of the electromagnet 13, and the spring 12 does not stretch the lever 11 behind itself, which moves the latch 10 upward with the other end, pressing its rotating head against the end surface of the ring 9. The brake belt 8 is pressed to the outer circumference of the brake Disk 7, brakes it. The parasitic gear also begins to rotate, overcoming the friction force of the brake disc 7 and rotates the gear 14 of the lower shaft and the gear of the upper shaft in opposite directions. With the help of friction, the workpiece of the spit begins to move forward forward, falling under the rotating knives 23 and 24. With the passage of the spit, it turns slightly due to the speed difference between the rollers and the chamfer knives (Nmax) and the shoulder 20. When the workpiece spins in the zone (RMHH ) the product must be rotated. This is accomplished by a collar 20 of the upper roller 19 with a chamfer () of the lower shaft and inclined teeth. When the tooth root is on the horizontal axis, i.e., on the contact line of the upper 19 and lower 15 rollers above the part, oblique, the outer circumference of the copying element hangs without touching the product. At this moment, the shoulder 20 of the upper roller 19 presses against the work piece (along the arrow P). And since the product is not clamped along the contact line and the speed Vi of the feed rollers 19 and 15 is greater than the speed V2 of the knives 23 and 24, the product, moving in arrow P, rotates at point O, without touching the chamfer (along arrow M and NJ, at an angle 2-4 °. After this section, the spit in the toe comes out from under the rollers 19 and 15, i.e. they do not move it. But the spit is already on the receiving conveyor-roller table 32 and the rotating knives 23 and 24 move the spit further, An already pointed braid is cut, and they cut off a small straight line of the sock.

At this moment, the ring 9 with a radial protrusion locates the rotating head of the latch 10, which serves as a stop. Half coupling 5, which is connected with ring 9, moving back along the shaft, comes out of engagement with coupling half 4, pressing spring 6 to the end surface of brake disc 7. Brake brake strip 8 slows down and stops rotation of the feed rollers, providing a gap Z parallel to the horizontal axis of the rollers, i.e., the rollers travel a distance of one turn. The trimmed spit falls onto the conveyor-conveyor 32, and the trimmed bar falls next to the conveyor drum in special

social packaging. The presence in the lower feed roller of a copying element, made with a chamfer and teeth inclined to its axis, allows

Forced rotation does not touch the chamfer. The presence of a collar copying element in the upper roller (the upper roller has the ability to regulate the pressure on the product) allows the product to move relative to the adjusting cutting heads with rotation. The adjusting cutting heads are shifted so that the beginning of the cut is on the contact line of the upper and lower feed rollers. Also, due to the difference in the speeds of the feed rollers and the knives on the difference in the length of the butt of the product and the blade curve, the curve is cut. As a result, the productivity of the cutter increases as compared with the base object. At the same time, the operator is not especially highly qualified to perform this operation, and in addition, the trimmed scythe enters the conveyor-roller conveyor, not distracting the operator to the product, preventing the operator from getting into the danger zone of the rotating blades.

Claims (2)

Invention Formula . Device for cutting curvilinear sheet parts, mainly blades 0 braids, containing a frame and a cutting unit installed in it in the form of upper and lower driving disk knives and a component feed unit with an individual rotational drive, characterized in that, in order to increase productivity and improve 5 of the quality of the parts produced, the part supply unit is made in the form of two cantilever upper and lower rollers with working surfaces, the working surface of the lower roller is formed by a sector and a copying element B in the form of a wedge with chamfer and teeth, spaced evenly and obliquely to the axis of the roller at an angle of 2 ... 4 °, the upper roller is provided with a means for adjusting the clamping force to the lower roller, and its working surface is formed by a sector and a wedge-shaped copy element with a shoulder with a height equal to the height of the lower chamfer the first roller, wherein the cutter drive assembly and the supply unit is provided with adjustable control systems, and the plane d proho0 conductive through the axes of circular blades, is offset relative to a plane passing through the axis of the feed roller assembly. 2. Device for and. 1, characterized in that, in order to improve the conditions of service, it is provided with a receiving conveyor-roller conveyor located in the zone of exit of the part from under the rollers of the feed unit. eight go Product. Ш Z3 19 15 Н нж Fy OS FIG. five 6 // ///////////Years old X X X /////////// lt FIG. 9 FIG. eight Obushok L (PU2.11 Type L .ffi, tfsjl $ Tfr J11 g f and g.1 g A W 11} FIG. 13