MXPA97009798A - Process for the manufacture of shears for hose connections and product obten - Google Patents

Abstract

The present invention relates to a process for the manufacture of spigots for connections of hoses that transport fluids in both gaseous and liquid state, characterized in that it comprises the die-cutting or cold forging of a tubular material, according to the following steps: First stage, select a tubular material for the manufacture of the spike, choosing the diameter of the tube and the thickness thereof, according to the requirements of use of the spike, cut a predetermined length of the tube to produce segments thereof, in a second stage, carry out by means of a hydraulic or pneumatic press the expansion of a section of the segment of tube, in order to give body and form to a step and the neck of what will be the spike, forming a piece expanded over part of its length In a third stage, perform an operation of expansion and compression, using two presses, to form on the one hand the head or structure in flake s with one of them and on the other hand, to give size, shape and body to a wing in the neck of the spike, in the section previously expanded, thus obtaining the pin die

Description

PROCESS FOR THE MANUFACTURE OF PINS FOR HOSE CONNECTIONS AND PRODUCT OBTAINED The present invention relates to a die-cutting process (cold forging) for the manufacture of spikes for hose connections by means of which the dimension, shape and body required is given, according to the application to which it is also intended. refers to a novel spigot structure which is used as a connection and fastening element between the connection parts of a hose-flexible quick connection.

The pin to which the present invention refers is a conducting element that comes in contact with fluids, either liquids or gases that are transported through a flexible hose or connector. The spigot is the key piece in flexible connectors, since at one end it allows the clamping of the hose and on the other, it retains the nut or connection element, giving it the freedom to freely rotate and be able to tighten to another external element. In addition, a packing can be attached to the spigot to ensure sealing in any type of joint.

The spikes that are currently known in the market, according to the manufacturing processes hitherto existing, are obtained by machining or injection, these processes have among other disadvantages the high waste they generate, deriving from this, several drawbacks of a technical nature, ecological and economic.

On the other hand, the spikes known up to now have some deficiencies in their operation, due to their structure and design such as an inappropriate sealing and fastening to a flexible hose, however the disadvantages most mentioned refer to the manufacturing processes thereof .

In accordance with the present invention, the applicant has developed a manufacturing process for spikes by die-cutting (cold forging), which is more efficient, by means of this process the required dimension, shape and body is given to the spike, in accordance to the applications to which it is submitted.

The use of spikes obtained by the punching process according to the present invention, produces considerable benefits, as a sample of the aforementioned, then a table in which are clearly indicated, important advantages of the process is disclosed. of manufacture that is claimed for obtaining ears, in relation to the processes known up to now.

** BASE = 1 The spike die-cut by its characteristics can be used in a wide variety of applications of fluid conduction, either in liquid or gas, being these economical and safe.

The material to be used in the manufacture of die-cut pins can be any non-ferrous malleable material, such as copper, aluminum or its alloys, preferably copper and its alloys and, optimally, copper in tubular form.

In the same way for specific applications, it is possible to use any alloy or material that by its characteristics responds better under the conditions of said application.

The die-cut spike can also be given metal finishes such as nickel-plated, chrome-plated, tin-plated, etc., which help its use characteristics.

In order to adequately illustrate both the manufacturing process and the product obtained according to the present invention, this description of drawings is accompanied in which: Figure 1 shows a side view of the different sections of the punched pin.

Figure 2 shows a combined side view, the upper part thereof refers to the external appearance of the pin, having a nut coupled, while the lower part shows the same parts in a side cut view.

Figure 3 also refers to a combined side view, showing the complete assembly of a flexible hose with a connector, the upper part of this figure illustrates as it would look on the outside, while the lower part of the figure shows a lateral cut of said assembly.

Figure 4 refers to a schematic view of the three different stages of the manufacturing process of the spike, also illustrating the product obtained.

In the figures mentioned above, reference numbers are used to identify, both the different parts of which the spike is constituted, and the different stages of its manufacture.

Referring to figure 1, the spikes are manufactured in a single piece, always hollow and with different external volumetry along the same. Commonly to the sections forming a spike, they are known as head 110, body 120, step 130, wing 140 and neck 150, these parts are identified very clearly in the drawing of figure 1.

The function of each one of the aforementioned parts of the pin is given below: The part of the pin formed by the head 110 and the body 120, is the one that is inserted inside the hose 210, until it meets the part called step 130, which is very clearly seen in Figure 3, the head serves as a holding part between the pin 100 and the hose 210, compressed by a splint 220 stapled around and along the body of the pin 100.

The step 130 of the pin 100 is housed in the retention hole of the nut 230 or connecting element and serves as a turning element (center) thereof, as shown in Figure 2.

The function of the wing 140 of the pin 100 is to serve as a support base and prevent the nut 230 from leaving the assembly. The neck 150 of the pin 100, is the part that is used to effect the joining and seal with an external connecting element such as a nipple. To achieve such an effect, a package 240 may be housed thereon, or the seal made directly with the peg 100, giving it a bevelled finish, to the neck 150.

With regard to the manufacturing process of the spike, referring to Figure 4, it has to consist of three stages; each one of them is illustrated in their respective tables of figure 4, the first stage corresponding to the upper left frame, passing according to the flow indicated by the arrows from the first to the third stage of the process, shown in the upper picture right the finished product corresponding to die die 100 of the present invention.

The steps of the process of the present invention are described in detail below.

First stage.- The manufacturing process is started by selecting the roll tubular material 70, for the manufacture of the spigot 100, preferably copper or its alloys. The diameter of the tube is chosen based on the diameter required by the body of the pin 100 and the thickness is determined according to the volumetric requirement of the design of the pin 100, previously determined.

In this first stage, the tube is cut by a cutting machine 300 to a predetermined length, resulting in a section cut 80.

Second stage.- In a hydraulic or pneumatic press 301, the expansion to the tube section 80 is carried out in order to give body and shape to the step 130 and the neck 150, forming the expanded piece 90.

Describing in more detail the operations of the second stage, it is necessary by means of a hydraulic or pneumatic press 301, the upper punching of the section or tubular segment 80 is proceeded, in order to achieve an expansion of said tube in part of the length thereof. , thus forming a step 130 caused by the variation in the outer diameter of the tube segment, the upper part being of greater diameter than the lower one thereof, also forming a neck 150 corresponding to the upper part of the expanded piece 90.

Third stage.- As a last step of this process an expansion and compression operation is carried out, using two presses 302 and 303, simultaneously forming the head 1 10 with one of them which is 302 and with the other, which corresponds at 303 the wing 140 is given size, shape and body, obtaining the finished product corresponding to the die cut according to the present invention.

In the expansion and compression operation, as stated above, two presses are used, with an upper and a lower punching being carried out, the expansion operation being carried out in the lower part of the tubular segment to form the head 110 of the spike and in the upper part of the tubular segment the compression operation to obtain the size, shape and body of the wing 140 in the neck 150, which now forms the spike.

The product obtained corresponds to the die stamp 100 which is shown in the upper right box of Figure 4.

The steps described above can be carried out in a single continuous process, in combined processes or in isolated processes, provided that the design and structure of the desired spike is obtained.

Claims (4)

1. Process for the manufacture of spikes for connections of hoses that transport fluids in both gaseous and liquid state, characterized in that it comprises in a first step, selecting a tubular material for the manufacture of the spigot, choosing the diameter of the tube and the thickness thereof, according to the requirements of use of the spike; cutting a predetermined length of tube to produce segments thereof; in a second step, carry out by means of a hydraulic or pneumatic press the expansion of the segment of tube, in order to give body and form to a step and the neck of what will be the spike, forming an expanded piece; in a third stage, perform an expansion and compression operation, using two presses, to form on one hand the head with one of them and on the other hand, to give size, shape and type to a wing on the neck of the spike, thus obtaining the die-cut spike.

2. Process for the manufacture of spigots for hose connections, according to claim 1, characterized in that the steps of this process can be carried out as a single continuous process, in combined processes or in isolated processes, as long as the design and desired structure of the spike.

3. Process for the manufacture of dowels for hose connections, according to claim 1, characterized in that by means of a hydraulic or pneumatic press the upper punching of the section or tubular segment is proceeded, in order to achieve an expansion of said tube in part of the length thereof, thus forming a step originated by the variation in the outer diameter of the tube segment, the upper part being of greater diameter than the lower part thereof, also forming a neck corresponding to the upper part of the expanded piece.

4. Process for the manufacture of dowels for hose connections, according to claim 1, characterized in that an expansion and compression operation is carried out, using two presses, with an upper and lower die cutting being carried out, the expansion operation being carried out. It performs in the lower part to form the head of the pin and in the upper part the compression operation to obtain the size, shape and body of a wing in the neck that is in the upper part of the tubular segment that now forms the tang . Spigots for hose connections that transport fluids in both gaseous and liquid state, characterized in that they are manufactured by a punching process, in a single piece, hollow and with different external volumetry along the same, comprising at one end a head, then and longitudinally presenting a section or body of the spike, then a step due to the difference in the magnitude of the outer diameter of this section of the spike, with respect to the body thereof, forming a segment identified as neck and a wing or projection formed in the neck of the spike. Hoses for hose connections according to claim 1, characterized in that they comprise a packing around the neck of the peg to achieve the connection and seal with an external connection element such as a nipple. Pin for hose connections according to claim 1, characterized in that the neck of the pin has a bevelled end to allow said pin to seal with a connecting element such as a nut. Pin for hose connections according to claim 1, characterized in that the head and the body of the pin are the parts that are introduced into the hose, until it meets the wall called the step, the head serving as a retaining element between the tang and the hose, which is compressed by a splint stapled around and along the body of the spike; the step of the pin is housed in the holding hole of a connecting element such as a nut and serves as a turning element (center) thereof; the wing of the pin serves as a support base and prevents the connection element from leaving the assembly and the neck of the pin is the part used to effect the union and seal with the external connection element. Hoses for hose connections according to claim 1, characterized in that they are made of any malleable non-ferrous material, such as copper, aluminum or its alloys, preferably copper and its alloys and more preferably copper in tubular form. . SUMMARY The present invention relates to a process of punching (cold forging) for the Manufacture of spikes for connections of hoses by means of which the dimension, shape and body required is given, according to the application for which it is intended, likewise refers to a novel spigot structure, which is used as a connection and fastening element between the connection parts of a flexible hose. The manufacturing process of the spike consists essentially of three stages: the first consists of selecting the tubular material for the manufacture of the spike, in this first stage the tube is cut to a predetermined length. In a second stage, the expansion of the pipe section is carried out by means of a hydraulic or pneumatic press, in order to give body and form to a step and to the neck of what will be the spike. The third stage of the process consists of an expansion and compression operation, using two presses, simultaneously forming a head with one of them and with the other a size, shape and body is given to a wing in the neck of the spike. The spike obtained is manufactured in a single piece, always hollow and with different external volumetry along the same, the sections of which it is formed are in longitudinal direction: a head, the body of the spike, a step, a neck and a wing on the neck of the spike.