TWI222907B - Method for making a press-fit barrel - Google Patents

Abstract

This invention relates to a method for making a press-fit barrel, comprising the steps of: trimming a rod, extruding and compressing a lower side to form a reduced body with smaller diameter; punching a central bore from opposing ends thereof; forming a block at the intersection between different diameter portions; reversing and punching the workpiece to form a flared configuration at an upper side of the reduced body by punching the reduced body from an upper side and forming tiny slits at a lower portion of the reduced body.

Description

1222907 (_ Feng No. 92114107 Rev. i. V. Invention Description (1), | [Technical Field to which the Invention belongs]. The present invention relates to a method for forming a crimping nut, especially to use a punching method on a tubular body. [Previous technology] The economic prosperity drives the progress of industrial technology. In order to seek business growth in fierce competition, the most basic thing is to reduce man-hours. Reduce product defects | | rate 'to reduce The cost of manufacturing is to improve the competitiveness of Nanan, and the snap-in screw sleeve is to be introduced. I said that because this product is fast and convenient to install, it is directly inconvenient for small spaces: places where threads are used, such as computer case interiors, automobiles Built-in, switchboard, etc., can be used in combination with thin plates, which has good tightening force after installation, 4 long service life, and its use, as shown in Figure 1, is attached to the fixture 1 | A hole is drilled, and the fixing member 1 is made of a thin plate-shaped soft material i |

, So if you want to use screw-on elements to set, in the case of thin thickness, so that I

The screwing element can only be set by one screw, which results in a very poor screwing effect.

The crimping screw sleeve 2 is threaded through the hole of the fixing piece 1. The crimping screw sleeve .2 is connected to a hollow pipe body 2 1 with a convex ring 2 2 at the upper end, and the convex ring 2 2 and the pipe body are provided. A small groove 2 3 is opened at the junction of 2 1, and the crimping screw sleeve 2 passes through the hole of the fixing member 1 with its tube body 2 1, and the upper end of the crimping screw sleeve 2 is paired with a punch 3 from above When the head is punched, when the fixing member 1 is made of a soft material, as the pressing force of the punching, a squeezing effect is formed around the hole of the fixing member 1 to cause it to occur. Deformation thus penetrates into the grooves 2 3 to obtain the best fixing effect. At the same time, the installation is fast and convenient, and the service life is long after installation, and no loosening will occur. Because the grooves 2 3 have a relatively small width, For forming small grooves 2 on the crimp nut 2 °

1222907 Case No. 92114107 Revised on Month-Day---......--..-.............;.. ---- -7 _ _ V. Description of the Invention (2) · ·; 3, conventional The processing methods are all using a specially manufactured narrow turning tool, Li 1 | The small groove can be formed by turning. Although the shape of the groove can be achieved, the purpose of the groove is, but because the groove is a thin ' The small state, so that turning tools can easily become stuck and damaged during turning, and the turning tool consumes more than | |, and because of the turning tool replacement operation, the processing time is extended, every minute 丨| About 3 ~ 5 pieces are formed, which causes an increase in manufacturing costs. In addition, because the turning tool is used for turning processing, this turning processing will strengthen the material itself.

It has caused damage, but for the aforementioned disadvantages, the industry has not been able to propose an effective I • | solution, and can only continue to use this bad method, so how to smoothly complete |

Grooving processing can also reduce manufacturing costs, and the current industry is extremely distressed by the & service. I | [Summary of the Invention] The first object of the present invention is to provide a crimping screw sleeve forming process | method, after cutting the bar material, extruding to form a uniformly small outer diameter shrinkage on the lower side, and then A middle hole is punched from the two ends, and a stop is formed at the intersection of two different outer diameters. Then, the reverse punch is set to expand the upper side of the shrinkage body to a flared shape, and then the shrinkage body is punched from the upper side. Let the "small |" groove be formed under the shrinkage. Another object of the present invention is to provide a crimping screw sleeve forming and adding method. _I method, after cutting the bar, extruding the lower side Form a small outer diameter shrinkage, and then punch through the middle hole from the two ends, and then reverse the punch, 丨

Make the upper side of the shrinkage expand outwards into an oblique cone, and then punch the shrinkage from the upper side I

Set it so that a small groove is formed under the shrinkage. . . I Another object of the present invention is to provide a crimping nut forming process!!

Page 6 Page 1222907 _______________________________________________________________________ 92114107 ---------- year. Correction on the 1st t. ----------------------------- ----------------------------—.- …… ——- —-I. Description of the invention (3) | Method, borrow After cutting the pipe, extrusion is performed to form a smaller outer i-shaped shrinkage on the lower side, and the reverse side is punched to make the upper side of the shrinkage expand outward to form a squad i-shape, and then the upper side faces The shrinking body is punched, so that a small groove is formed below the shrinking body. Another object of the present invention is to provide a method for forming and processing a crimping nut, by forming a recessed ring groove at a small groove under the shrinkage, so that the pressing force of the fixing member under the impact is set. When it penetrates into the groove, it can be caught in the ring groove i to achieve the purpose of improving the fixing force. I [Embodiment] | * In order to make it easier for your reviewers to understand the processing method of the present invention and the effect achieved by I, I will explain it with the drawings as follows:! · Please refer to Figure 2 first, the processing method of the present invention, After cutting a bar 4 of an appropriate length, a punching and extrusion operation is performed on the bar 4 so that the lower side of the bar 4 forms a shrinkage 4 1 having a smaller outer diameter, and the upper side of the bar 4 forms a The recessed hole 4 2 is then punched from the center of the upper and lower sides. Since the punching operation is performed simultaneously, a load 4 3 is formed at the junction of different outer diameters, and the bar 4 is reversed. Then, a punching process is performed from the upper side of the shrinkage 41 to form an outward expansion of the upper side of the shrinkage 41, and finally, a punching process is performed from the upper side of the shrinkage 41 to make the shrinkage 41 1 A small groove 4 4 is formed below to complete the processing procedure. · Please refer to Figure 3 for the first time. After cutting the rod 4 of appropriate length, the punching and extruding action is performed to make the lower side of the rod 4. A shrinkage 4 1 with a smaller outer diameter is formed, and the rod 4 A concave hole 4 2 is formed on the upper side, and then the punching action is performed by the central part of the bar material, so that a through hole is punched out, and then the bar material 4 is punched.

1222907 Case No. 92114107 Amendment I. V. Invention Description (4) | Reverse, and punching process from the top of the shrinkage 41, so that the I side of the shrinkage 4 1 forms a squad shape that expands outward. Finally, a punching process is performed from the upper side of the shrinkage body 41, so that a small groove 4 4, i is formed at the lower part of the shrinkage body 41 to complete the processing program. 1 Please refer to FIG. 4 again. After punching through holes in the bar 4 and punching through it, a recessed ring groove 4 5 is punched at the cross section of the shrinking body 4 1 and the bar 4. The bar 4 is then reversed, and punching processing is performed from above the shrinkage 41, so that the upper side of the shrinkage 41 is formed into a p-shaped shape that expands outward. Finally, punching processing is performed from the upper side of the shrinkage 41. A small groove 4 4 is formed at the lower part of the shrinking body 41 and a concave ring groove 4 5 is formed at the ring groove 4 4 to complete the processing procedure. In the processing method of the present invention, since the bar material 4 is intercepted to be formed by punching, the bar material 4 is extruded during the forging process, and the material is made denser. It can effectively increase the strength of the finished product, and because it is not turned, it will not cause damage to the strength at the groove. It can also make the processing speed faster by using the automatic punching of the mold, and the processing speed can reach every minute 80 ~ 100 pieces, which is faster than the conventional turning method, up to 20 times higher, without the need to use a turning tool and without the wear of the turning tool, and can greatly reduce the manufacturing cost. Please refer to FIG. 5 again. In the implementation of the present invention, the hollow pipe 5 can also be directly used for molding. After cutting the pipe 5 of an appropriate length, the upper end of the pipe I 5 is punched with a smaller outer diameter shrink 5 1 and the shrinkage of 5 1

I I has a larger aperture, and then punches the upper side of the shrinkage body 5 1 to form an upper shape of the shrinkage body 5 1 that expands outward, and then the upper end surface of the shrinkage body 5 1

1222907 _—— _________________—— Emperor 192114107 _________________________________ 1st year of the year ——... Amendment V. Description of the invention (5) Perform punching so that a small groove 5 2 is formed below the shrinking body 5 1 to complete the entire machining process 'Because the pipe is directly punched and forged, the use of a turning tool does not require the use of a turning tool to prevent the strength of the finished product from being damaged, which can reduce the manufacturing cost. In addition, as shown in FIG. 6, the formed crimping screw sleeve 6 of the present invention may have a large-diameter convex ring 6 1 at the end, which may have various shapes such as a circular shape with a zigzag, a polygonal shape, or a square. , And can be applied to the needs of various screw installations.

To sum up, the method of the present invention is not only unavailable in the market, but also can speed up processing time and wastelessly. It can also improve the strength of the finished product and reduce the manufacturing cost, thereby achieving industrial applicability and being innovative and progressive. For the essentials, I have filed an application for an invention in accordance with the law, and I would like to ask your reviewing committee for detailed examination, and I would like to thank you for your approval of the patent.

Page 9 1222907, Ameri 92114107 Rev. _. I Schematic description 丨 (A) Schematic description: (I Figure 1 is a schematic diagram of the use of a conventional plug. Figure 2 is a processing step of a preferred embodiment of the present invention Schematic diagram. Figure 3 is a schematic diagram of the processing steps of another preferred embodiment of the present invention. Figure 4 is a schematic diagram of the processing steps of another preferred embodiment of the present invention. Figure 5 is a schematic diagram of the processing steps of another preferred embodiment of the present invention. ◦ I Figure 6 is the embodiment of the invention of the finished product of the crimping screw special sleeve. 丨 (two) Figure number description:

I ^ 11Fixture 2Clamping nut 2 1Tube body 2 2Convex ring 2 3Groove 3Punch bar 4Bar 4 1Shrink body 4 2Concave 孑 L. • 4 3Support block 4 4Groove 4 5Ring Slot 5 Pipe 5 1 Shrink 5 5 Slot · 6 Press-fit screw sleeve 6 1 Convex ring

Page 10

Claims (1)

1222907 _____________________________________________________ — Case 1 92114107 — ^ Year 1 once _____________________ JTi VI. Application for patent scope I 1 · A crimping screw sleeve forming processing method, first cut a bar of appropriate length: and perform punching action to make the bar under A small shrinkage body with a smaller outer diameter is formed on the side, and a concave hole is formed on the upper side of the bar, and then from the upper and lower sides! • I punch at the same time, and form a joint at the junction of two different outer diameters. Stopper, and then j, invert the bar and punch from the upper side of the shrinkage to make the upper side i of the shrinkage expand outward, and then press the upper side of the shrinkage. A small groove is formed below the shrinkage to complete the processor. 2 · — A crimping screw sleeve forming and processing method, first cut a bar of appropriate length and perform a punching operation so that the lower side of the bar forms a small outer diameter | shrinkage, and the upper side of the bar is formed A concave hole, 'Next, punch the center j of the bar to form a through hole, and then reverse the bar and punch from the top of the shrink to expand outward from the shrink. The leftover shape is punched out from the upper side of the shrinkage, so that a small I ί ί I groove is formed below the shrinkage, and the processor is completed.丨 3 · A kind of crimping screw sleeve forming and processing method, first cut a pipe of proper length I, punch the upper end of the pipe into a shrink with a smaller outer diameter, and the diameter of the shrink is larger, and then the shrink The upper side of the body is punched, so that the upper side of the shrinkage body is formed into an outwardly expanding shape, and then the upper end surface of the shrinkage body is punched, so that a small groove is formed below the shrinkage body to complete the processing. By. 4 · A crimp as described in item 1, 2, or 3 of the scope of patent application. · Screw sleeve forming processing method, in which the groove under the shrinkage can also be provided with I β! Recessed ring groove.丨 Page 11