JPH0224615B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a spring manufacturing machine with two motors.

In recent years, as control devices including numerical control devices, computers, etc. have become cheaper and more widespread, spring manufacturing machines are also using wire feeders instead of the conventional single motor for wire feeding and tool operation. A system has been developed that is equipped with two motors: a feed motor and a tool operating motor that operates tools such as coiling pins and cutting tools, and these two motors are controlled by a control device. . However, this type of spring manufacturing machine had the following drawbacks. That is, when performing complex processing on a spring, for example, when processing the front and rear ends of a coil spring, the wire rod feed motor and tool operating motor must be started and stopped frequently by the control device. - A certain response time is absolutely required for stopping, and as a result, there is a certain limit to the number of springs produced per hour, which has the disadvantage of not being able to mass-produce springs.

This invention was made in order to eliminate the above-mentioned drawbacks, and it is possible to feed the wire rod by using a tool actuating motor as needed, so that the tool actuating motor can be used to feed the wire rod during complicated machining of springs. It is an object of the present invention to provide a spring manufacturing machine which can increase production by operating a wire feed roller as well as a wire feed roller.

The present invention will be explained below based on embodiments shown in the drawings.

FIG. 1 shows a power transmission system of a spring manufacturing machine according to an embodiment of the present invention, and the line feed motor 1 shown in this figure is a pulse motor, a DC servo motor, etc., which controls the stop position and the rotation speed. It is a motor that can be controlled freely. The rotation of the gear 3 attached to the output shaft 2 of the line feed motor 1 is transmitted to the gear 6 via gears 4 and 5, and this gear 6 has a so-called one-way clutch 7 that outputs the rotation only in one direction. Another roller shaft 9 is arranged parallel to this roller shaft 8, and line feeding rollers 10, 11 are fixed to the upper ends of these roller shafts 8, 9. ,11
The wire rod, which is the workpiece, is fed by. A gear 12 is attached to the middle of the roller shaft 8, and this gear 12 meshes with a gear 13 of the other roller shaft 9, so that the rotation of the roller shaft 8 is transmitted to the other roller shaft 9.

Separately from the wire feed motor 1, a tool operating motor 14 is provided which operates tools such as coiling pins and cutting tools.
4 is also constituted by a motor such as a pulse motor or a DC servo motor that can freely control the stop position and rotation speed. This tool operating motor 14 and the line feed motor 1 are connected to a computer, a pulse generator,
It is controlled by a control device 15 including a storage device and the like. A gear 17 attached to the output shaft 16 of the tool actuating motor 14 meshes with a gear 19 fitted to a camshaft 18, and a required number of tool actuating cams 20 are attached to the camshaft 18. The operating cams 20 operate tools such as coiling pins via known power transmission mechanisms (not shown) including rocking levers and the like provided correspondingly to each of the operating cams 20. camshaft 1
8 (or another camshaft linked to it)
A required number of auxiliary feed cams 21 are attached to the auxiliary feed cams 21, and these auxiliary feed cams 21 actuate a swing arm 23 via a swing lever 22 provided correspondingly to each of these auxiliary feed cams 21. These swinging arms 23
Each is attached to an auxiliary feed shaft 25 via a so-called one-way clutch 24 that outputs rotation in only one direction. Therefore, the swinging arm 23
Only the oscillation in one direction is transmitted to the auxiliary feed shaft 25. FIG. 2 shows a specific example of the above structure for transmitting the rotation of the camshaft 18 to the auxiliary feed shaft 25. In this figure, the bracket 32 of the machine frame 31
The swing lever 22 is swingably attached to the 3
The roller 36 attached to the tip of the arm 33 is in contact with the auxiliary feed cam 21, and the roller 37 attached to the tip of the arm 34 is the swinging arm. It fits into the notch 38 of 23. Since the tension spring 39 attached to the swing arm 23 applies clockwise rotational force to the swing lever 22 via the swing arm 23, the arm 35 is screwed into the screw hole 40 of the machine frame 31. The end of the stopper 41 made of threaded rods is moved forward and backward to change the clockwise swinging limit position of the arm 35, that is, the swinging lever 22, and the swinging by the auxiliary feed cam 21 is performed. By changing the swing angle of the movable lever 22, the swing angle of the swing arm 23 can ultimately be changed. That is, the stopper 41 is moved to the left (second
The more the lever 22 is protruded from the auxiliary feed cam 21, the more the swing lever 22 is rotated counterclockwise to move the roller 36 at the tip of the arm 33 away from the auxiliary feed cam 21. By reducing the swing angle of the swing arm 23, the swing angle of the swing arm 23 can be reduced. The roller 36 is the auxiliary feed cam 21
If the swing lever 22 is rotated to a position where it does not come into contact at all, the swing lever 22 will not operate at all. It goes without saying that the swinging arm 23 can be caused to swing directly by the auxiliary feed cam 21.

Returning to FIG. 1, the auxiliary feed shaft 25 has a bevel gear 2.
6 is attached to this bevel gear 26, and a bevel gear 27 is attached to this bevel gear 26.
This bevel gear 27 is attached to the roller shaft 8 via a one-way clutch 28.

Next, the method of use and operation of the above-mentioned spring manufacturing machine will be explained.

First, a case will be described in which a spring is manufactured using an auxiliary feeding mechanism, in other words, a case in which the same spring is mass-produced. In this case, the position of the stopper 41 is adjusted to adjust the swing angle of each swing arm 23, and a desired program stored in the control device 15 is called up, and the spring manufacturing machine is operated based on the program. Prepare to operate. After such preparation, when the start switch of the control device 15 is pressed, the spring manufacturing machine performs a predetermined action based on the program and manufactures the spring. For example, when manufacturing a coil spring with hooks at both ends, the tool operating motor 14 is activated to rotate the camshaft 18, which causes the tool operating cam 20 to operate a predetermined tool (not shown) at a predetermined time. At the same time, the auxiliary feed cam 21 rotates the roller shaft 8 via the swing lever 22, the swing arm 23, and the auxiliary feed shaft 25 to rotate the rollers 10 and 11, and feeds the line in synchronization with the tool operation. can be done. Note that during this time, the line feed motor 1 is stopped, so gears 3 to 6 do not rotate, but gear 6
is attached to the roller shaft 8 via the one-way clutch 7, so the rotation of the roller shaft 8 is not prevented by the stopped gear 6. After completing the front end processing of the coil spring in this way,
The tool operating motor 14 is stopped and the line feed motor 1 is rotated in its place, thereby causing the gear 3 to rotate.
The roller shaft 8 is rotated through the rollers 1 to 6.
By rotating 0 and 11 and performing high-speed line feeding,
The wire is extruded toward a coiling pin (not shown) to form the body of the coil spring. During this time, since the tool operating motor 14 is stopped, the bevel gear 27 at the lower end of the roller shaft 8 does not rotate, but since the one-way clutch 28 is interposed between the two,
The stopped bevel gear 27 does not prevent the rotation of the roller shaft 8. When winding of the body is completed, the line feed motor 1 is stopped, the tool actuating motor 14 is operated again, and the rear end machining is performed in the same manner as the front end machining. After this, a cutter (not shown) acts to cut off the completed coil spring, and then the front end of the next coil spring is machined as described above by the rotation of the tool operating motor 14, and in this way, the completed coil spring is cut off. Coil springs are manufactured on a regular basis. By using such a spring manufacturing machine, a large amount of springs can be manufactured.

Next, a case will be described in which springs are manufactured by alternating operation of the two motors 1 and 14 by the control device 15 without using an auxiliary feeding mechanism, or in other words, a case in which various types of springs are manufactured in small quantities. In this case, the camshaft 18 may be moved by removing all the auxiliary feed cams 21 from the camshaft 18 or by protruding the stopper 41 to the left in FIG. Even if it rotates,
While preventing the auxiliary feed shaft 25 from rotating,
A desired program among the programs stored in the control device 15 is called up. After such preparation,
When the start switch is pressed, the line feed motor 1 and the tool operating motor 14 are started according to the instructions from the control device 15.
repeats starting and stopping, the wire feed motor 1 feeds the wire, and the tool operation motor 14
The tool can be operated to manufacture the spring. In this case, by simply storing many programs in the control device 15 and calling up the desired program, it is possible to easily manufacture various types of springs without having to replace cams or the like as in conventional spring manufacturing machines. I can do it.

As described above, according to the present invention, the tool operating motor is capable of operating the tool and also operating the line feed motor, so when performing complicated machining on the spring, the tool is not required to operate the tool. It is possible to operate the tool and the line feed roller at the same time without frequently starting and stopping the operating motor and line feed motor. Therefore, the production volume per hour can be reduced by repeatedly starting and stopping both motors. When manufacturing springs, the improvement can be nearly doubled. The tool operation motor, which is installed separately from the wire feed motor, can freely control the stop position and rotational speed of a pulse motor, etc., so when forming the spring body (coil part), the tool operation motor is installed separately from the wire feed motor. By slowing down or stopping the operating motor (tool operating camshaft), the body forming time can be taken completely freely, so that any length of body can be obtained. Also,
For the same reason, the operating time interval between tools can also be adjusted freely.

[Brief explanation of drawings]

The drawings show embodiments of the invention,
FIG. 1 is a power transmission system diagram, and FIG. 2 is a side view showing the power transmission mechanism between the camshaft and the auxiliary feed shaft. DESCRIPTION OF SYMBOLS 1...Line feed motor, 10, 11...Line feed roller, 14...Tool operation motor, 15...Control device, 18...Camshaft, 21...Auxiliary feed cam, 2
2... Swinging lever, 23... Swinging arm, 24... One-way clutch, 25... Auxiliary feed shaft.

Claims (1)

[Claims] 1. It has a line feed motor such as a pulse motor that can freely control the stop position and rotation speed, a tool operating motor such as a pulse motor that can freely control the stop position and rotation speed, and a control device that controls these two motors. , a required number of auxiliary feed cams are attached to the tool operation cam shaft rotated by the tool operation motor or a shaft that rotates in conjunction therewith, and the auxiliary feed cams swing directly or via a swing lever. A spring manufacturing machine equipped with two motors, in which a swinging arm is attached to an auxiliary feed shaft via a one-way clutch, and rotation of the auxiliary feed shaft can be transmitted to a line feed roller.