KR19980076719A - Ring punch - Google Patents

Abstract

Disclosed is a ring punch that is used to manufacture a ring such as a solder ring from a wire rod in a press machine or the like. The ring punch is to produce a ring in a unified ring forming process, and consists of an upper forming punch 100 and a lower forming punch (200). The upper forming punch 100 has an inclined cross section 111 and a forming groove 112 opened therein, and the lower forming punch 200 has a first diameter portion 211 and a forming groove for forming an inner diameter of the ring. 112) has a second diameter portion 221 to be inserted in close contact with the inner circumference and a stepped portion 222 for ring support between the first and second diameter portions. The wire is fed and cut so as to lie in the normal direction to the stepped portion 222, and is formed into a ring by gradually entering the forming groove while gradually winding the first diameter portion by the inclined cross-section portion as the upper forming punch descends. This is effective in reducing costs by simplifying the equipment for ring making and improving productivity by shortening the process time.

Description

Ring punch

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a ring-operated perch mainly used to make solder rings by cutting wire rods to a certain length and molding them into a circular shape. It is for cutting the wire and forming the ring to be supplied in a single process by mounting.

Solder rings are used, for example, in circular solder joints in refrigerant pipe joints and other various products that are piped to heat exchangers (condensers, evaporators, etc.) of air conditioners. In order to improve the efficiency of soldering work, it is necessary to prepare solder rings in advance for each soldering part. Conventionally, a ring molding apparatus is well known as a device for manufacturing such a ring of solder, which is cut into a predetermined length by supplying a solder and formed into a ring shape on a mandrel.

Conventional ring forming apparatus is a mandrel (1), a wire guide (2) for guiding wire feed from one side of the mandrel (1) as shown in Figure 1, and radially disposed around the mandrel (1), respectively, the center of the mandrel (1) It consists of upper and lower forming dies 3 and 4 and a pair of punches 5 and 6 which are operated back and forth in the direction. The wire rod guide 2 has a guide groove 2a for guiding the wire rod 7 supplied in a tangential direction to the main surface of the mandrel 1. Of course, the wire 7 is intermittently conveyed by a predetermined length by a supply roller or the like not shown. The upper and lower forming dies 3 and 4 are installed so as to face each other in a direction of 180 ° with respect to the mandrel 1 and to be advanced back and forth toward the mandrel 1, respectively. 3a, 4a). On the other hand, the upper forming die 3 is coupled to a cutter (8) for cutting the wire guide supplied to the wire guide (2). The pair of punches 5, 6 are arranged symmetrically in an oblique position on both sides of the lower half of the mandrel 1, and they are moved back and forth together in the mandrel 1 center direction.

Referring to the ring forming process by the conventional ring forming apparatus, as shown in FIG. 2a, when the wire 7 is supplied to the mandrel 1, the upper die 3 is lowered, and when the upper die 3 is lowered, As shown in 2b, the wire 7 positioned at the end of the wire guide 2 is cut by the cutter 8, and the forming groove of the upper die 3 in which the center of the cut portion placed on the mandrel 1 is lowered ( Deformation by 3a) results in a shaping ring 7 'as shown. Next, as shown in FIG. 2C, a pair of punches 5 and 6 positioned at both the left and right sides of the lower half of the mandrel 1 are simultaneously advanced while the upper die 3 is pressed against the mandrel 1. 7 '), both ends are closed close to the circle. Then, after the pair of punches 5 and 6 are returned, the lower die 4 is raised. When the lower die 4 is raised, the periphery of the mandrel 1 and the upper and lower dies 3 and 4 are as shown in FIG. 2D. Between the forming grooves 3a, 4a is formed into a complete circular ring 7. Thereafter, the upper and lower dies 3 and 4 pressed from both sides of the upper and lower sides are returned, and the above-described process is repeated after the molded ring 7 is taken out.

That is, in the conventional molding machine, four steps are performed from the cutting of the wire rod to the completion of the molding. In order to perform such a process, complicated driving means such as a cam device for sequentially interlocking the respective parts is required. Precise adjustment for precise timing and movement is required. Therefore, the conventional molding machine has a problem such that the structure is complicated, expensive, frequent failures, poor molding caused by poor adjustment. In particular, the conventional molding machine is a time-consuming process because the work process of several steps to complete a single ring is time-consuming and its productivity is lowered.

SUMMARY OF THE INVENTION An object of the present invention is to provide a ring punch which can simplify the work and greatly reduce the working time by unifying the various steps of the conventional steps for ring molding in order to solve the above-mentioned problems at a time.

1 is a front view schematically showing a conventional ring forming apparatus.

Figure 2a to 2d is an operation diagram showing a step by step the process of manufacturing a ring by a conventional ring forming apparatus.

Figure 3 is a partially cut perspective view of the ring action punch according to the present invention.

Figure 4 is a partially cut front view showing a state in which a wire is supplied to the ring action punch according to the present invention.

5 is a partial cutaway front view showing a state in which a wire rod fed by a ring action punch according to the present invention is cut;

Figures 6a to 6c is a partial side cross-sectional view sequentially showing the operation from the wire cutting to the completion of ring forming after cutting the wire rod by the ring action punch according to the present invention.

7A to 7C are cross-sectional views shown on lines A-A, B-B, and C-C shown in Figs. 6A to 6C, respectively.

Figure 8 is a partial side cross-sectional view showing a state in which the ring is completed by the ring action punch according to the present invention.

9 is a partial front view showing a state in which a ring formed by a ring forming punch according to the present invention is detached from the punch;

Explanation of symbols on the main parts of the drawings

100: upper forming punch 110: forming die

111: inclined cross section 112: forming groove

114: expansion portion 115: cutting portion

120: forming pad 121: ring support

200: lower forming punch 210: mandrel

211: first diameter portion 220: stripper

222: stepped portion 300: wire rod guide

302: cutting die 400: wire rod

400 ': Cut wire rod 400: Ring

In order to achieve the above object, the present invention, in forming a ring forming punch for forming a ring from a wire rod, the forming groove having a diameter for forming the outer diameter portion of the ring while having an inclined cross section, the inclined cross section An upper forming punch opened by the opening, a first diameter portion for forming the inner diameter portion of the ring opposite to the inner circumference of the forming groove of the upper forming die, and a second diameter portion which can be inserted in close contact with the inner circumference of the forming groove; A lower forming punch having a step portion for supporting a ring between the first and second diameter portions, the wire rod being tangentially placed on the step portion of the lower forming punch and the first and second portions of the lower forming die When the diameter part is inserted into the forming groove of the upper forming punch, both ends of the wire are gradually bent in a circular shape by the inclined end surface of the upper forming punch, and the inner circumference of the forming groove and the lower forming punch Entering between the first diameter portion being configured such that the ring is to be molded.

The present invention is characterized in that the tapered shape of the edge of the forming groove opened in the inclined cross-section of the upper forming punch in particular to allow the wire rod to enter the inner circumference of the forming groove, the lower forming punch Common wire supply means for intermittently supplying the wire rod to the stepped portion of the wire, forming a cutting portion on one side of the cross-section of the upper forming punch to cut the supplied wire rod, and detaching means for detaching the formed ring together It does not exclude that it is provided.

According to the present invention, it is possible to unify the various steps of the conventional ring forming apparatus described above in manufacturing the ring from the wire rod. In other words, the upper forming punch and the lower forming punch is capable of producing a ring by the operation of reciprocating relatively once. Therefore, it is possible to construct a ring making machine of a simple structure without using a drive unit such as a complicated cam mechanism, for example, by a lifting structure of a simple structure such as a drive unit of a press machine. In addition, the present invention greatly shortens the time required to manufacture one ring from the wire rod, in particular by unifying several stages of fixation for conventional ring forming. When described in detail with reference to the accompanying drawings a preferred embodiment of the present invention.

Ring-acting punch according to the present invention is composed of the upper forming punch 10 and the lower forming punch 20, as shown in Figure 3, assembled with a drive device not shown with a wire guide 30 for guiding wire supply do. The drive is possible by conventional means, such as a simple lifting mechanism, the detailed illustration and description of which are omitted for convenience.

The upper forming punch 100 is coupled to the forming die 110 and the forming pad 120. The molding die 110 is cylindrical and formed to have a large diameter with respect to the inclined end portion 111 formed to be inclined at the lower end, the forming groove 112 and the forming groove 112 formed to be opened in the inclined end portion 111, and a forming pad. Flow guide groove 113 for receiving the flow 112, the opening 114 of the forming groove 112 on the inclined cross-sectional portion 111, the tapered shape (114), and the inclined cross-section ( 111 has a cutting portion 115 provided at one edge. The forming pad 120 has a ring ring surface 121 at the bottom and a hollow portion 122 drilled on the ring ring surface 121. Here, the cutting unit 115 is integrally formed to cut the wire rod supplied on the wire rod guide to be described later, but for this purpose, it is also possible to fasten a separately manufactured cutter there.

The lower forming punch 200 is coupled to the mandrel 210 and the stripper 220, the second diameter portion 211 provided to the outer circumferential surface of the mandrel 210 and the second circumferential surface of the stripper 220. It has a diameter portion 221 and a stepped portion 222 provided to the top surface of the stripper 220. Here, the first diameter portion 211 is a portion for forming the inner diameter of the ring facing the inner peripheral surface of the forming groove 112 formed in the forming die 110 of the upper forming punch 100, the second diameter portion 221 is a diameter that can be inserted in close contact with the inner peripheral surface of the forming groove 112. In addition, the stepped part 222 supports the wire rod to be pushed into the forming groove 112 at the initial stage of the ring molding, and at the end of the ring molding, the pad surface of the forming pad 120 of the upper forming punch 100 is described. It is for pressing the ring formed therebetween with respect to 112 so that it may shape | mold in a plane.

The wire rod 300 is provided as a wire rod supply means together with a conventional wire rod supply apparatus. It has a guide groove 301 for guiding the wire rod 300, such as lead, to be tangential to the stepped portion 222 of the lower forming punch 200, that is, the top surface of the stripper 220. Here, the edges near the end of the guide groove 301 of the wire guide 300 is provided to the cutting die 302 for the cutting portion 115 of the upper forming punch 100 described above. That is, the wire rod 300 is transferred to the stepped portion 222 of the lower forming punch 200 along the guide groove 301 of the wire guide 300 by a conventional wire feeding device (not shown). 302 is intermittently fed so that the desired circumferential length of the ring protrudes.

Referring to the ring forming process by the ring action punch according to the present invention, as shown in Figure 4 the upper forming punch 100 is wired by the wire feeder not shown in the raised state with respect to the lower forming punch (200) When 400 is supplied to be placed on the stepped portion 222 on the stripper 220 of the lower forming punch 200 along the guide groove 301 of the wire guide 300, the upper forming punch 100 is shown Is lowered by an undriven drive. When the upper forming punch 100 is lowered, as shown in FIG. 5, the cutting unit 115 on one side of the inclined cross-section 111 of the forming die 110 rubs the cutting die 302 of the wire guide 300 and places the wire rod therein. 400 is cut. The cut wire 400 'is gradually cut from the center of both ends of the wire 400' as shown in FIGS. 6A to 6C and 7A to 7C as the lowering of the upper forming punch 100 continues. As the upper molding punch 100 enters the forming groove 112 of the forming die 110, as shown in FIG. 8, the forming groove 112 and the lower forming punch 200 side mandrel 210 are formed on the upper forming punch 100. It is molded into a complete ring 400 between the first diameter portions 211 on the outer circumferential surface. That is, the first diameter portion of the mandrel 210 is gradually deformed by being deformed forward by the inclined end portion 111 of the upper forming punch 100 forming punch 110 in which both ends of the cut wire rod 400 'are lowered. 211) is wound around and the wound is to enter the forming groove (112). In this case, the enlarged portion 114 formed at the edge of the forming groove 112 on the inclined cross section 111 helps the wire rod 400 'to be wound around the first diameter portion 211 of the mandrel 210. The wound portion serves to guide the well to enter the forming groove (112).

The ring 400 formed between the forming groove 112 of the upper forming punch 100 and the first diameter portion 211 of the lower forming punch 200 has a support surface 121 and a stripper (120) of the forming pad 120. After pressing slightly between the stepped portions 221 of the 220 to form a plane, as shown in FIG. 9, the upper forming punch 100 is returned and detached by the stripper 220 being raised.

As described above, in the ring forming punch according to the present invention, the wire cutting and the subsequent ring forming process are performed in a single process. Therefore, a simple lifting mechanism such as a press can be used as the driving portion for operating such ring forming punches. In particular, since a single tool makes a ring of uniform quality, the ring production time is shortened.

As described above, the present invention is a single-step process of forming a ring such as a solder ring from a wire rod. The present invention reduces the cost of equipment by providing a ring forming apparatus having a simple structure. In addition, the present invention is effective in mass production of rings such as solder rings because the defect rate is minimized and the ring production time is shortened.

Claims (7)

In the ring forming punch for forming a ring from a wire rod, An upper forming punch having an inclined cross section and a forming groove having a diameter for forming an outer diameter of the ring and opening in an inclined cross section; Between the first diameter portion for forming the inner diameter portion of the ring and the second diameter portion which can be inserted in close contact with the inner circumference of the forming groove facing the inner circumference of the forming groove of the upper forming punch, and the first and second diameter portions. Ring punching, characterized in that the lower forming punch having a stepped portion for supporting the ring. 2. The molding die according to claim 1, wherein the upper forming punch has an inclined cross section formed obliquely at a lower end thereof, and a forming die in which the forming groove is formed so as to be open to the inclined cross section; And a forming pad having a ring paper surface for supporting a ring formed therebetween together with the step portion of the lower forming punch. The ring forming punch according to claim 1 or 2, wherein a tapered enlargement is formed at the edge of the forming groove on the inclined cross section. 2. The lower forming punch according to claim 1, wherein the lower forming punch comprises a mandrel having the first diameter portion, and a stripper having the second diameter portion and the stepped portion and axially coupled to the mandrel. Ring punch made. 2. The ring punch according to claim 1, further comprising wire rod supply means for supplying the wire rod to the stepped portion of the lower forming punch. The ring action punch according to claim 5, further comprising a wire rod guide having a guide groove for guiding the wire rod to which the wire rod supply means is supplied. According to claim 1, wherein the cutting portion for cutting the wire rod is formed in the upper forming punch, the guide groove for guiding the wire supply to the step of the lower forming punch and the cutting die for the cutting portion of the upper forming bias Ring action punch, characterized in that the wire guide having a.