JP3725737B2 - Spring making machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a spring manufacturing machine.
[0002]
[Prior art]
Conventionally, the following are known as this type of spring manufacturing machine. That is, a machine frame having a vertical front wall, a wire processing space formed in front of the front wall of the machine frame, and a wire path for guiding the wire sent toward the wire processing space and provided on the front wall The final wire guide, the at least one pair of wire feed rollers that are rotatably provided on the front wall on the opposite side of the wire processing space of the final wire guide, and feed the wire while sandwiching the wire, and wire processing on the front wall At least one bending die slide provided to be able to move forward and backward with respect to the space and attached with a bending die, and provided to be able to move forward and backward with respect to the wire processing space on the front wall, and a cutter was attached. It is known to have a cutter mounting slide and a core bar provided on the front wall in the vicinity of the wire processing space side of the final wire guide. JP-B-64-4858 see Japanese Publication).
[0003]
[Operation of spring making machine]
The basic operation of the spring manufacturing machine will be described below.
The wire (workpiece) in a state of being pinched by the wire feed roller is sent to the wire processing space through the final wire guide as the wire feed roller rotates. Then, the wire rod fed into or being fed into the wire rod processing space is subjected to predetermined processing by various tools including a bending die that protrudes or protrudes into the wire rod processing space. Are formed with a front foot such as a front hook, a coil portion [spring body] followed by a spring having a rear foot such as a rear hook).
The coil portion is formed by continuously bending the wire rod fed toward the bending die against the bending die.
The cutting of the wire is performed by stopping the feeding of the wire, causing the cutter to protrude toward the core, and shearing and cutting the wire with the cutter and the core.
[0004]
[Disadvantages of the prior art]
The conventional spring manufacturing machine has the following drawbacks.
As shown in FIG. 3, when the diameter of a coil portion of a spring manufactured by a spring manufacturing machine (hereinafter simply referred to as a spring diameter) is changed, for example, a diameter larger than the diameter D1 of the spring S1 wound up to now. When winding the spring S2 of D2, the wire W fed from the final wire guide 41 is turned into two bending dies 13, 16 (these positions are naturally changed with the change of the spring diameter). Since the semicircle that is curved and wound becomes larger, it is necessary to move the cutter 19 and the cored bar 21 to the position of the alternate long and short dash line. Thus, the movement of the cutter 19 and the cored bar 21 must be performed every time the diameter of the spring is changed, and the adjustment of the relative positional relationship such as the distance M between the cutter 19 and the cored bar 21 is finely adjusted. There is a drawback that the trouble of the is troublesome. The adjustment of the relative positional relationship between the cutter 19 and the cored bar 21 is to shear the wire rod W with the cutter 19 and the cored bar 21, and is absolutely necessary for smoothly cutting the wire rod W. That is.
[0005]
[Means for eliminating the above-mentioned drawbacks]
The present invention employs the following means in order to eliminate the above disadvantages.
The invention of claim 1 has a wire rod processing unit and a wire rod feeding unit, and the wire rod processing unit includes a fixed machine frame having a vertical front wall, and a wire rod formed in front of the front wall of the fixed machine frame. A working space, at least one bending die slide provided on the front wall of the fixed machine frame so as to be able to advance and retreat with respect to the wire material processing space; And at least one cutter mounting slide and a core bar provided in the vicinity of the wire rod processing space on the front wall of the fixed machine frame, and the wire rod feeding unit is provided in the casing having a vertical front wall, and in the casing A final wire guide having a wire passage through which a wire sent toward the wire processing space passes, and a final wire guide that is rotatably provided on the front wall of the casing while pinching the wire. And at least a pair of wire feed rollers with the axis oriented in the front-rear direction, and the wire feed unit is perpendicular to the wire feed direction to the wire feed unit and the axial direction of the wire feed roller It is slidable in a direction orthogonal to the direction.
[0006]
【The invention's effect】
The present invention has the following effects by the configuration as described above.
According to the invention of claim 1, the wire feeding unit is provided in the wire processing unit so as to be slidable in a direction perpendicular to the wire feeding direction and perpendicular to the axis of the wire feeding roller. When changing the diameter of the spring, it is necessary to change the position of the bending die for changing the diameter of the spring. By changing the wire feeding unit relative to the cutter mounting slide and the metal core without changing the position, it is possible to more easily cope with the change in the spring diameter.
The effect will be specifically described with reference to FIG. 3. When the diameter of the spring to be manufactured is changed, the positions of the bending dies 13 and 16 are changed, and the final wire guide 41 is changed to the position of the two-dot chain line. That's what it means.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
In this description, “front” refers to the front side of FIG. 1, “back” refers to the back side, “left” refers to the left side of FIG. 1, and “right” refers to the right side of FIG.
[0008]
The spring manufacturing machine 1 includes a wire rod processing unit 4 and a wire rod feeding unit 3. The wire processing unit 4 has a fixed machine frame 9 having a front-shaped rectangular space 7 penetrating in the front-rear direction at the center and a vertical front wall 8, and is formed in front of the front wall 8 of the fixed machine frame 9. Wire rod machining space 10, first bending die slide 12 provided on front wall 8 so as to be movable forward and backward relative to wire rod machining space 10, and first bending die 13 attached thereto, and wire rod machining on front wall 8 The second bending die slide 15 on the left side to which the second bending die 16 is attached and the front wall 8 are provided so as to be able to advance and retract relative to the wire processing space 10. And the left cutter mounting slide 18 to which the cutter 19 is mounted, and a core bar 21 detachably provided in the vicinity of the wire processing space 10 on the front wall 8.
[0009]
The first bending die slide 12 and the second bending die slide 15 can be moved forward and backward with respect to the wire rod processing space 10 by a known slide operating device 25. The slide actuating device 25 is disposed on the side of the first bending die slide 12 (or the second bending die slide 15) to which the ball screw 26 is rotatably mounted on the front wall 8 and to which the ball screw 26 is screwed. It has a female screw member (not shown) provided and a motor 27 that can rotate forward and backward to rotate the ball screw 26.
With such a configuration, the first bending die slide 12 and the second bending die slide 15 can be operated by rotating the ball screw 26 forward and backward.
[0010]
The cutter mounting slide 18 can be moved forward and backward with respect to the wire processing space 10 by a known slide operating device 31 described in detail below.
One end of a connecting rod 33 is connected to the cutter mounting slide 18 by a connecting pin 32 having an axial center directed in the front-rear direction, and the other end of the connecting rod 33 is connected to a swing lever 35 by a connecting pin 34 having the axial center directed in the front-rear direction. The base of the swing lever 35 is fixed to a rotary shaft 36 with the axis oriented in the front-rear direction. The rotary shaft 36 is rotatable about a fixed machine frame 9 including the front wall 8 and is rotated forward or backward (in a forward or reverse direction, not a full rotation of 360 degrees) directly or indirectly by a motor (not shown) within a predetermined angle range. Rotation).
With such a configuration, the cutter mounting slide 18 can be moved back and forth with respect to the wire processing space 10 by rotating the rotating shaft 36 in a forward and reverse direction within a predetermined angle range.
[0011]
The use state of the spring manufacturing machine 1 in a state of being symmetrical with the left second bending die slide 15 and the left cutter mounting slide 18 about a virtual vertical line including the center in the left-right direction of the wire processing space 10 as a symmetry axis. A right second bending die slide 15 and a right cutter mounting slide 18 are provided on the front wall 8 which are used when the angle is changed, that is, not used in the state shown in the figure.
The structure of the right second bending die slide 15 is the same as that of the left second bending die slide 15, and the structure of the right cutter mounting slide 18 is the same as that of the left cutter mounting slide 18.
[0012]
The wire rod feeding unit 4 housed in the space 7 of the fixed machine frame 9 includes a casing 40 having a vertical front wall 39, and a wire rod W fed toward the wire rod machining space 10 provided on the front wall 39. A final wire guide 41 having a wire passage (not shown) that passes therethrough and at least one pair of the wire rod W that is rotatably provided on the front wall 39 and that feeds the wire W toward the final wire guide 41 while sandwiching the wire W In this embodiment, three sets of wire feed rollers 42 are provided. The axis of the wire rod feeding roller 42 faces the front-rear direction.
A wire rod guide 44 having a wire rod passage (not shown) through which the wire rod W passes between the wire rod feed rollers 42 and a wire rod passage through which the wire rod W passes below the lower wire rod feed roller 42 ( A wire rod guide 44 having a not-shown shape is provided on the front wall 39.
[0013]
The wire feed rollers 42 are rotated together by an interlocking mechanism (not shown) so that the pairs of the wire feeding rollers are rotated simultaneously and reversely, and the input shaft (not shown) of the interlocking mechanism is a motor. (Not shown). In the state shown in FIG. 1, the left wire rod feed roller group 42 rotates counterclockwise, and the right wire rod feed roller group 42 rotates clockwise. The interlocking mechanism and the motor are housed in the casing 40.
[0014]
The wire rod feeding unit 3 housed in the space 7 of the fixed machine frame 9 is slidable left and right by means described in detail below in the wire rod machining unit 4, that is, perpendicular to the wire rod feeding direction (vertical direction). In addition, it is slidable in a direction orthogonal to the axial direction (front-rear direction) of the wire rod feeding roller 42.
[0015]
A pair of front and rear guide rails 47 are provided on each of the pair of upper and lower horizontal walls 46 of the fixed machine frame 9 that define the space 7 so that the longitudinal direction is directed in the left-right direction. A guided member 48 that slides along these guide rails 47 is attached to the casing 40 of the wire rod feeding unit 3. On the bottom wall of the casing 40 of the wire rod feeding unit 3, a female screw member 49 having an axial center directed in the left-right direction is provided, and a ball screw 50 is screwed into the female screw member 49 through the left and right walls of the casing 40. The ball screw 50 is rotatably fitted to a pair of left and right bearings 51 fixed to the lower horizontal wall 46 and is rotated by a forward / reverse rotatable motor 52 fixed to the lower horizontal wall 46. ing.
With such a configuration, the wire feed unit 3 can be slid left and right by rotating the ball screw 50 forward and backward. The distance that the wire rod feeding unit 3 moves left and right is “2L”.
The wire feed unit 3 is equipped with a known lock device (not shown). The known lock device releases the lock when the wire feed unit 3 moves, and the wire feed unit 3 stops. The wire feeding unit 3 is locked.
[0016]
As shown in FIG. 3, when winding the spring S2 having a diameter D2 larger than the diameter D1 of the spring S1 that has been wound up to now, the positions of the first bending die 13 and the first bending die 16 are changed, and the wire rod is used. The final wire rod guide 41 may be changed to the position of the two-dot chain line by moving the feed unit 3 to the right side. FIG. 4 shows the state after the position change.
[0017]
[Modifications]
A description will be given below of modified examples.
(1) The mechanism for sliding the wire feeding unit 3 is arbitrary.
(2) There may be a pair of wire rod feed rollers 42.
[Brief description of the drawings]
FIG. 1 is a simplified front view showing an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
FIG. 3 is a schematic diagram for explaining the drawbacks of the prior art and the effects of the present invention.
FIG. 4 is a schematic diagram showing a positional relationship between a cutter, a cored bar, and the like when a spring S2 having a diameter D2 is wound by the spring manufacturing machine according to the embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Spring manufacturing machine 3 Wire rod feed unit 4 Wire rod processing unit 7 Space 8 Front wall 9 Fixing machine frame 10 Wire rod processing space 12 First bending die slide 13 First bending die 15 Second bending die slide 16 Second bending die 18 Cutter mounting slide 19 Cutter 21 Core bar 39 Front wall 40 Casing 41 Final wire guide 42 Wire feed roller

Claims (1)

The wire rod processing unit includes a wire rod processing unit and a wire rod feed unit. The wire rod processing unit includes a fixed machine frame having a vertical front wall, a wire rod processing space formed in front of the front wall of the fixed machine frame, and a fixed machine frame. At least one bending die slide provided on the front wall of the fixing machine frame so as to be movable forward and backward, and at least one cutter mounting slide provided on the front wall of the fixed machine frame so as to be movable forward and backward with respect to the wire rod processing space. And a cored bar provided in the vicinity of the wire processing space on the front wall of the fixed machine frame, and the wire feeding unit includes a casing having a vertical front wall and a wire processing space provided in the casing. A final wire guide having a wire passage through which a wire sent toward the shaft passes, and a shaft that is rotatably provided on the front wall of the casing and that feeds the wire toward the final wire guide while pinching the wire. At least a pair of wire feed rollers oriented in the front-rear direction, and the wire feed unit slides on the wire processing unit in a direction perpendicular to the wire feed direction and perpendicular to the axial direction of the wire feed roller. A spring making machine that can be moved.

Images