JPH0321790Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Purpose of the invention] (Field of industrial application) This invention is an elastic ring (holder spring) with a loop that can be incorporated into a resin foil cap for automobiles, etc., and can attach the foil cap to a foil disk. This relates to a wire homing machine that performs automatic forming processing.

(Prior Art) Conventionally, as shown in FIG. 8, elastic rings H have been provided with glazing-shaped bent portions P formed by press working at appropriate pitches around the circumference of the ring, and As shown in the figure, an elastic ring H is known in which partially arc-shaped members forming a loop L inscribed in the circumference are connected and a welded part Q is formed so that a ring can be formed. In addition to being too weak to be used as a built-in device, there were also manufacturing problems.

(Problems to be solved by the invention) In view of the above-mentioned circumstances, this invention forms a wire rod into a ring shape, and provides multiple loops inscribed at arbitrary pitches on the circumference to cover the entire circumference. A wire homing machine with a configuration that automatically forms continuously an elastic ring with a loop that welds the cut end of the formed ring is obtained, and it is incorporated into a resin foil cap for an automobile to easily mass-produce a holder spring with good equipment. It makes it possible.

[Structure of the idea]

(Means for Solving the Problems) In order to achieve the above-mentioned purpose, this invention is based on the production of an elastic ring formed by molding a wire, in which a plurality of loops are inscribed in the circumference of the ring at arbitrary pitches. In order to wrap and form the loop along its circumferential surface, a winding spindle with a winding pin at its tip is rotated while moving forward, and the loop is protruded perpendicularly to the bending surface. After winding and forming the wire rod, the winding pin is reversed, the winding spindle is moved backward, and the winding process is repeated by the loop forming mechanism that separates the loop from the bending surface to obtain the required size of the elastic ring and the winding of the loop. A servo drive device and a wire feeding mechanism are used to form the number of times.
The present invention relates to a wire homing machine that is equipped with a CNC control device and a wire gripping and guiding mechanism and cutting mechanism that are linked to feed control to automatically form continuous elastic rings.

(Function) The function of this invention will be explained with reference to the drawings of the embodiment.

A wire homing machine 1 shown in FIGS. 1 to 4 continuously and automatically forms an elastic ring H (referred to as a holder spring in the embodiment) formed by forming a wire rod W shown in FIG. 5 into a ring shape. It has an effect. In Fig. 5, in order to form n-1 loops inscribed at an appropriate number of pitches on the circumference of the ring,
An elastic ring H is formed by feeding the wire by a stroke amount F ₁ , F ₂ ...F _o-1 , and wrapping and forming a loop L on each wire.
In order to close the circumference of
An elastic ring H (holder spring) is formed by welding the cut end E to the front end.

Figures 6 and 7 show a state in which the holder spring H for an automobile is attached to a mounting arm D provided around the periphery of a resin foil cap C, and is detachably attached to a wheel disk. As shown, the outer diameter portion OD of the mounting arm D of the holder spring H is loaded onto the disk side. To explain the operation of this invention according to the forming process of this holder spring H, in FIG. It passes through the feed guide roller 20 on the circumference along the bending surface, and as shown in FIG. 2, it is fed out by the amount F1 shown in _FIG . A winding spindle 25 shown in FIG. 3 is driven via an air cylinder 27 to the wire rod W, and a core roller 22 and a winding roller 23 shown in FIG.
The loop processing actuator 28 is driven to rotate the winding pin 11 to wrap and form the wire W passed through the loop.

Note that when the wire W fed out for bending is formed while being gripped by the gripping guide mechanism 9 via the winding tension prevention grip tool 24, the winding spindle 25 moves backward while being reversed, and the grip tool 24 The CNC-controlled servo motor 16 is driven so that the next F feed action begins. After the forming process is completed until the circumference is completed by repeating the forming process cycle of loop forming and feeding action, in order to activate the cutting mechanism 10, the air cylinder 23 for cutting shown in FIG. 35, the wire W is cut and rolled into a chute 36 shown in FIG. 3 for discharge. Next, the feeding mechanism operates again to continuously and automatically form the holder spring H. In addition, as shown in Figure 1
In the NC control box 4, the feed mechanism is controlled based on the program input to the operation panel 2.
The above-mentioned processing process is controlled by signals from the NC circuit.

(Example) An example of this invention will be described below based on the drawings.

FIG. 1 shows a wire homing machine 1 of this invention. An NC control box 4 is installed on the side of the operation console 3, which has an operation panel 2 on the front, and transmits control signals to related drive mechanisms according to an automatic molding program input from the operation panel 2.
A support frame 5 made of an elastic ring is constructed on the operation table 3, a spindle table 7 equipped with a loop forming mechanism is vertically disposed on the front surface of the support frame 5, and a feeding mechanism 8 for the wire rod W is installed on the front surface of the support frame 5. and its gripping guide mechanism 9
and a processed product R rotating on the bending surface of the loop adjacent to the cutting mechanism 10 and perpendicular to the rotation center line XX of the winding pin 11 of the loop forming mechanism 6 at the vertical center line YY of the front surface of the support frame 5. A support plate 12 is vertically installed on the front surface of the support frame 5 to support it from one side while guiding it until ring forming.

2 and 3 show the configuration of the front and side cross sections of the support frame, respectively, and the wire W is indicated by the arrow A.
When the material is fed from the direction, the material guide 13 is inserted into the contact pressure cylinder 1 provided at the bottom of the support plate 12.
A pair of feed rollers 15 whose contact pressure can be adjusted are provided via the servo motor 16 via the driving gear 17, and an R adjustment screw 18 is provided up and down on the front surface in the feeding direction of the wire W sent out from the servo motor 16 via the drive gear 17. The curvature of the ring H to be formed is formed by colliding with the R roller 19 to be formed, and the ring H is passed between the feed guide rollers 20 arranged in parallel above the ring H, and the loop forming ring is passed from the guide cutter 21 through the feed guide rollers 20 arranged in parallel above the ring H. The wire rod W is fed out by the feeding amount F for the purpose of Fig. 4A,
As shown in (b), at the rotation center line XX of the winding pin 11 fitted to the tip of the winding spindle 25, it is inserted from the opening side between the protruding core metal roller 22 and the winding roller 23. Form. A winding tension prevention grip tool 24 is interposed between the feed guide rollers 20 and is formed to grip the wire W so that it does not return in response to the F feed completion signal.

On the other hand, a winding pin 11 and a core roller 2 are attached to the tip.
2. The winding spindle 25 equipped with the winding roller 23 is equipped with an air cylinder 27 equipped with a spring 26 that can move forward and backward along the rotation center line XX of the winding pin 11.
An air actuator 28 for loop processing and a loop winding amount adjustment screw 29 for adjusting the amount of loop rotation are provided at the front lower part of the spindle stand 7 provided with.
A pinion 30 and a gear 31 for forward and reverse rotation as the winding spindle 25 moves forward and backward are mounted on the shaft and connected to an air actuator 28. The pinion 30 is formed to have a long width so as to maintain its meshing state even if its relative position with the meshing gear 31 shifts due to the forward stroke of the winding spindle 25 in the direction of arrow B.
After the loop is formed by the winding pin 11, the winding spindle 25 moves backward while reversing the rotation, and when the grip is released, a signal from the loop processing completion signal sensor 32 is sent to the feed circuit, and the next F feed is started. . In response to the signal from the completion signal sensor 32 for these repeated loop forming processes, the cutting air cylinder 33 attached to the back surface of the support plate 12 is activated, the elastic ring H is cut by the cutter 35, and the elastic ring H is cut by the cutter 35. It falls onto a chute 36 protruding downward from the front and is rolled and discharged. Further, when the cutter 35 is operated, a processing cycle completion signal is sent to the NC-controlled feed circuit, allowing continuous automatic molding processing.

[Effect of idea]

Since this invention has the above configuration, it has the following advantages.

(1) In an elastic ring formed by forming a wire into a ring shape, a plurality of loops inscribed on the circumference of the ring with an arbitrary pitch or an unequal pitch can be wound with an arbitrary number of turns and of an arbitrary size. Ability to automatically and continuously mold elastic rings.

(2) In addition to being able to freely change the feed rate of the wire, loop forming is extremely simple and easy to operate using a servo motor mechanism and CNC control program selection, and ring-shaped products without loops can also be processed. Be possible.

(3) Therefore, it can be attached to a foil disk for use as a holder spring incorporated in a resin foil cap for automobiles, which has the advantage of cost reduction and can enhance the mass production effect due to the highly productive molding mechanism.

[Brief explanation of the drawing]

Fig. 1 is an explanatory perspective view of the overall assembly of an embodiment of the wire homing machine of this invention, Fig. 2 is an explanatory view (front view) of the parts attached to its support frame,
Figure 3 is an explanatory diagram (side view) of the attached parts in the side cross section, Figure 4 is a front view explaining the small assembly of the winding pin, Figure B is a side cross sectional diagram of the winding pin, and Figure 5 is the loop forming process. 6 is a perspective view illustrating the assembly of a resin foil cap for an automobile; 7 is an enlarged sectional view of the holder spring mounting portion shown in 5;
Fig. 8 is a component explanatory diagram (front view) of Example 1 of the elastic ring according to the prior art, and Fig. 9 is Example 2 of the same as above.
FIG. 3 is a parts explanatory diagram (front view) of Explanation of symbols of main parts, 1... Wire homing machine, 6... Loop forming mechanism, 8... Feeding mechanism, 9... Gripping guide mechanism, 10... Cutting mechanism,
11... winding pin, 16... servo motor, 25
... winding spindle, L ... loop, H ... elastic ring (holder spring), W ... wire rod.

Claims (1)

[Claims for Utility Model Registration] (1) In manufacturing an elastic ring H formed by molding a wire rod, a plurality of loops L inscribed in the circumference of the ring H at arbitrary pitches are formed along the circumferential surface of the ring H. a loop forming mechanism 6 that rotates a winding pin 11 that is wound and formed by moving it in and out orthogonally to the circumferential surface;
A servo motor 16 is attached to repeat the winding cycle to freely adjust the size of the ring H, the number of turns of the loop L, etc. to form the required elastic ring H, and a CNC-controlled wire feed mechanism 8 and feed control are provided. A wire homing machine characterized in that it is provided with a wire gripping and guiding mechanism 9 and a cutting mechanism 10 that are interlocked with each other. (2) A winding spindle 25 is provided which rotates forward and backward in conjunction with the forward and backward drives to appear and retract from the circumferential surface of the loop L, and rotates the winding pin 11 provided at the tip of the winding spindle 25 to move the loop L. The loop L has a configuration in which it is formed and then reversed and retreated.
A wire homing machine according to claim 1, which is provided with a forming mechanism 6.