SU1416250A1 - Automatic machine for manufacturing torsion springs - Google Patents

Abstract

The invention relates to the field of mechanical engineering, is intended for the manufacture of wire torsion springs, allows you to expand the technology

Description

12

13

BUT

29

(/)

4ib

ABOUT

ate

f114

The possibilities are due to the infinitely variable adjustment of the number of turns and the length of the ends of the springs to be curled. The machine contains mounted on the frame drive and wire feeders, winding, sections and straightening. The machine also includes a means for interconnecting the feed and winding mechanisms, which comprises two rails I 27 and 29, each provided with supporting I elements 36 and 37, of which at least one is mounted for adjustment movement and a frame 24 connected with a valve I pneumatic cylinder 4 and mounted on i rails with the possibility of reciprocating i movement along the rails i between the supporting elements and the interaction of 1 action with the latter. Reiki set6250

Lena with the possibility of movement. The winding mechanism comprises a spindle 8 with a mandrel 10 installed therein, having the possibility of reciprocating movement. The mandrel is connected with the step-forming device through the lever 18, which through the roller 19 interacts with the cam-23 mounted on the frame 24. The slats 27 and 29 are connected with the Vis spindle by the feed mechanism. Moreover, the rail 29 is connected to the feed rollers 32 and 35 by the overrunning clutch 31. The frame 24 is provided with a screw 38 mounted for axial movement and engagement with the anvil 39, and the amount of movement of the screw is not less than the pitch of the teeth of the pinion gear 30 of the spindle. 4 hp f-ly, 4 ill.

one

The invention relates to mechanical engineering and is intended for the manufacture of torsion springs from wire, widely used in all industries.

The purpose of the invention is the expansion of technological capabilities by continuously adjusting the number of turns and the length of the springs.

Figure 1 shows the machine, a general view; Fig. 2 shows a pneumocinematic circuit of the automaton; FIG. 3 is a section A-A in FIG. one; figure 4 - view B in figure 1.

On the base 1 there is a housing .2 of the winding mechanism and periodic wire feed 3, a driven pneumatic cylinder 4, an air preparation unit 5, two pneumatic distributors 6 and 7 with pneumatic distribution system, a control panel (not shown). Inside the housing 2, a spreader 8 is mounted, having co-mounted and connected with spitz-type connectors 9 with interchangeable mandrel 10 ipinol 11 with interchangeable flange 12, at the end of which a leash 13 is pressed in to start the end of the wire 3. the direction of the wire 3 and increase the rigidity of the mandrel 10 is a pad

14. The gas bar 9 with the mandrel 10 is pressed against the flange 12 by the spring 15. Pinol J1 is pressed against the support cap of the spindle 8 by the spring 16...

Compressive forces of the spring 15 are greater than the compressive force of the spring 16. T he is 9 through the coupling 17, the lever 18, the roller 19 mounted on the axis 20 p by the spring 21, which can reciprocate in the guide sleeves 22 of the lever 18, interacts with the cam 23, mounted on frame 24. Lastly, through guide bushes 25, mounted on two, installed in the direction of their: bushings 26 of housing 2, rails, one of which 27 through gear 28 is connected with pin 8, and the other 29 through gear 30, overrunning clutch 31 - with the lower roller 32 of the feeder, installed prefecture on a common shaft 33. The feed mechanism further includes a / 34 gear pair with a gear ratio, the binding roller 32 with the upper roller 35 to increase the pulling force feeding.

The frame 24 connected to the rod of the pneumatic cylinder 4 has the possibility of reciprocating movement

and interactions with adjustable

3

stop nuts 36 and 37, which are mounted in the initial position at a distance h and h from the frame. The frame: is fitted with an adjustable screw 38 in contact with the spring-loaded stop 39 of the housing 2, to fine-tune the spindle 8 with the flange 12 and the leash 13 to its original position with an adjustment value not less than the circular pitch of the gear teeth 28. On the base 1 there are spring-loaded stops 40, clamping in the initial position of the slats 27 and 29 to the end faces of the sleeves of the sleeves 25 of the frame 24.

14

I

The body 2 with adjustable axial displacement for size 1 is equipped with a cut-off mechanism made in the form of a single-acting pneumatic cylinder 41, on the stem of which the cutter 42 is fixed with a guide rinse 43, a fixed cutter 44 fixed to the mechanism case.

Dp of the automatic control of the operation cycle of the automaton on the body 2 are installed limit switches 45 and 46 with the inclusion of stops 47 and 48, and on the pneumatic cylinder 41 there are limit switches 49 and 50 with the inclusion of the stops 51 of the bracket fixed on the rod of the pneumatic cylinder 41. On the crown 52 bracket 2. The straightening mechanism 53 of the wire 3 is fastened.

The machine works as follows.

In the initial position, the frame 24 with the slats 27 and 29 is in the lowest position, and the slats are on the stops 40. The cutter 42 is in the extreme upper position, the wire 3 is threaded between the mandrel 10 and the driver 13, which is above the mandrel in a vertical plane, and clamped in the rolls of rollers 32 and 35 and the rollers of the mechanism of editing 53 o. The limit switches 45 and 49 are pressed, the electromagnets of the pneumatic distributors 6 and 7 are turned off.

Fine adjustment of the driver 13 to the initial position is carried out (if necessary) by turning the spindle 8 with the help of a screw 38. In this case, the slats 27 and 29 are brought to the initial position and remain pressed to the ends of the sleeves 25 by the tips of the stops 40, the compression force of which is slightly more weight rails.

1416250

Since the winding and wire feeding is carried out from one pneumatic cylinder, its stroke length with frame 24 is calculated based on the condition of obtaining the specified maximum number of turns at h 0 and the maximum total length of the ends twisted at h 0. From these conditions, we obtain the ratio to calculate the optimal stroke length L of the frame 24

L ITD-, h

Ma) tc

TO

 - (1, P, d) Alaks,

where D is the diameter of the initial circumference 0

five

D

Dr

1 g K

gear rack 28; the specified number of turns of the coiled spring; the diameter of the initial circumference of the pinion gear 30; the diameter of the working generators of the streams of rollers 32 and 35; lengths of the ends of the winding spring; spring coefficient K

 -H.

thirty

where h.

35

-d - the number of wound turns to, segments.

The setting of the number of wound turns is made by the nut 36, by changing the length h, determined from the ratios:

L - h (

40

 h D, h-K,

45

where Lj is the length of the working stroke of the rail

27 when wrapped; L is the stroke length of the frame 24 (stem

pneumatic cylinder 4); h ,. - the stroke of the frame 24 without moving the rail 27.

Outcome of the specified number of vit

from

min

to h

. get

h "yn

0; h,

Max

 S D, - K X

X

max llyn

).

55

Length setting 1,. The cut end of the winding spring is produced by changing the distance from the axis of the mandrel to the cutting plane, by moving the cut mechanism (pneumatic ifpinHHApa 41) ..

I Adjust the length of the clamped-1 conen-1 (for a given end 1, produce jjlHTC by nut 37 by changing the length jjbi hj determined from the ratios:

L., L - h

Z

Bp

5i p

Dp /

H)

 De

L 1 - the length of the working stroke of the rail I .29 when feeding wire;

Ihj is the length of the frame stroke without moving the rail 29.

I The outcome from the given total линыliny of the ends from (, + 1,1.) Min D ° | (1 + la) wkc we get:

h

 P

 i / viMH

Vg

+ 1, -)

2 / max

h -5l Gp

: - f awanc Dp L

- :-( 1, .h-1,)

; The winding pitch is determined by the profile.

the working surface of the cam 23, and the diameter of the spring is determined by the diameter

the mandrel 10.

From the button on the control panel, the electromagnet of the air distributor 6 is turned on, the compressed air enters the lower cavity of the pneumatic cylinder 4, the rod of which with the frame 24 moves upward, releasing the limit switch 45. The rails 27 and 29 begin to move after the frame 24 stops to the nuts 36 and 37 At the same time, the spindle 8 begins to rotate from the movement of the rail 27 through the gear 28, the wire 3 is clamped and wound. The roller 19 is bevelled and the cam 23 is retracted onto the work surface b and through the lever 18 and the coupling 17 removes bar 9 with mandrel 10 and quill 11 with flange 12 to the right, providing a winding pitch. When winding the springs until the coils come into contact, the cam 23 does not have surface b and the mandrel 10 retracts to the right with the winding coil. The overrunning clutch 31 is configured so that when the frame 24 moves up (when winding the spring), the rotation of the pinion gear 30 is not transmitted called 33 and the rollers 32 and 35

1416250

0

25

rotated into a single winding movement of the wire 3.

At the end of the stroke of the frame 24 upward, the roller with 19 spring 21 is moved to its original position and hits the surface (bevel) c. The winding is completed, the slats 28 and 29 are kept in the extreme upper position of the rack and pinion.

0 gears 28 and 30 through a bond with a fixed wire 3, gaps equal to hj and h are formed between the ends of the collar sleeves 25 and the rails 27 and 29. Then, when the abutment 48 is pressed, of course, the 15th switch 46 turns on the electromagnet of the air diffuser 7, the pneumatic cylinder 41 is activated, a segment of the end of the wound spring is produced, which weakens on the mandrel 10 under the action of elastic forces.

At the same time, the roller 19, interacting with the bevel from the cam 23, through the lever 18, the coupling 17, the pu 9 pulls the mandrel 10 from the wound spring and the latter falls into the container.

When cut, the limit switch 50 is pressed, the electromagnet of the pneumatic distributor 7 turns off, the rod returns to its initial position

30 with a cutter 42, the limit switch 49 is pressed, by turning off the electromagnet of the pneumatic distributor 6, the compressed air is supplied to the upper cavity of the pneumo. motor cylinder 4 and its stock with frame 24

35 moves down.

The roller 19 rolls along the straight surface d of the cam 23, holding the mandrel 10 in its rightmost position, while the spindle 8 at the same time rotates. The rail 27 is moved down by its own weight, and the rail 29 is held in place by the wire pressed in the rollers 32 and 35. When the stop face of the sleeve 25 of the frame

45 24 into the shoulder of the rail 29 after the gear 30, the overrunning clutch. 31, the shaft 33 starts to rotate, the rollers 32 and 35, the wire is fed for a length of 1, + 1 until the frame 24

50 is stopped by screw 38 and stop 39.

At the end of the frame 24 downward movement, the roller 19 jumps off the surface of the cam 23, the released springs 15 and 16 move the tu 9 with the mandrel 10, pi55 zero 11 with the flange 12 and the leash 13 to the initial position. In this case, the mandrel 10 is passed under the fed wire 3, enters the opening of the block 14, the wiring 13 is located above the wire

714

lokoy Thus, the wire is between the mandrel 10 and the lead 13, i.e. in the starting position for coiling. After pressing the end stop 47, the switch 45 repeats the cycle. Thus, the whole cycle of obtaining the spring occurs in one double stroke of the frame 24 (rod of the pneumatic cylinder 4). I

Technical and economic advantages. The inventions are as follows. The described automaton allows to obtain torsion springs from which the number of turns, the length of the ends, the step of winding and the diameter can be adjusted. At the same time, the number of turns and the length of the ends of the springs can be adjusted in a wide range and in the specified range to obtain any values of the specified parameters. The adjustment of the number of turns and the length of the ends of the springs is made by moving the stop elements (taek) along the length of the rails. Therefore, the adjustment range is limited by the length of the rails. and since the latter are set vertically, the range is expanded without increasing the transverse dimensions of the automaton.

Claims (5)

1. An automatic machine for manufacturing torsion springs, comprising a drive mounted on the frame, a mechanism for periodically feeding the wire, a winding mechanism including a spindle with a mandrel associated with a step-converting device installed therein with the possibility of reciprocating movement and a spring removal mechanism installed with the possibility of axial movement, the cutting mechanism, the wire straightening mechanism and the means for ensuring the interconnection of the feed and winding mechanisms, which is characterized by the fact that chances due to the stepless adjustment of the number of turns and the length of the ends of the springs, the means for ensuring interconnection are made in de two mounted on the bed rack, each of which is equipped with two supporting elements, of which. at least one is installed with the possibility of adjusting the movement, and the frame associated with the drive and mounted on the rails with the possibility of reciprocating movement along the rails between the supporting elements and interacting with the latter, the slats are installed on the frame with the possibility of reciprocating movement and one of them is kinematically connected with the mandrel spindle, and the other with the feed mechanism through the means for breaking the kinematic chain. 2. The automatic machine as claimed in claim 1, wherein the means for breaking the kinematic chain is fulfilled as an overrunning clutch. 3. Automatic POP.1, characterized in that its drive is made in the form of a pneumatic cylinder, the rod of which is connected to the frame. 4. The machine according to claim 1, characterized in that the clamp-forming device includes a cam mounted on the frame, a lever pivotally fixed at one end on the frame, and connected with the other end to the mandrel, and a roller mounted. on the lever with the ability to interact with the cam. 5. The automaton according to claim 1, distinguishing the yushi and the fact that the frame is provided with a screw mounted on it with the possibility of adjusting axial movement and interaction with the stop, mounted on the frame to limit the frame movement, while the amount of movement of the screw is not less than the pitch of the teeth of the pinion gear of the mandrel spindle. 37 4 / d FIG. Buff b I L J 27 Surgus Compiled by Y. Sukhov Editor M.Tovtin Tehred A. Kravchuk Proofreader M, Pojo Order 4013/10 Circulation 589Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d. A / 5 fig.Z ./ "