HU193432B - Method for treating spirals wound onto core wire - Google Patents

Abstract

The invention relates to a method and to a device for producing helixes, particularly in the case of incandescent-lamp production. According to the method, a wire is wound on a core wire (12) in the form of a helix (9), is subsequently cleaned and is subjected to heat treatment, whereupon the core wire (12) is released and is wound onto a storage drum (8), and is mounted thereon. At this point, the core wire (12) is released from the surface of the storage drum (8). The helixes (9) are held on the storage drum (8) until they are used. Before being used, the helixes (9) are unwound and checked. The method according to the invention and the device according to the invention permit the automation of the insertion of very precise, heat-treated helixes (9) when they are used. <IMAGE>

Description

The present invention relates to a method for treating spirals wound on a core wire, which are mainly used as filament in filament lamps.

The most important component of the filament lamp is the helical filament, hereinafter referred to as the "filament", usually made of tungsten. This basically determines the light bulb light, life, etc. It features. At present, the production of incandescent light bulbs is only economical on high-capacity production lines, so automating the production and installation of spirals is an important requirement. However, the currently known methods can provide either accuracy requirements or automatic dosing.

In the most commonly used spiral fabrication process, the spirals are wound continuously and thus wound. The spiral is then heat-treated together with the cored wire and then cut with the cored wire. This causes the spirals to become disordered. After another heat treatment, the core wire is chemically dissolved. After the release of the mostly molybdenum wire, the tungsten spiral remains. These spirals are packed, transported and stored after manual sorting. When installed in a lamp, the spirals are first placed in the container of the assembly machine, which is in most cases a vibrating feeder. This is where the spirals are aligned and oriented, and the individually positioned feeder is connected. The feeder places the coils on the lamp electrodes where they are secured by welding.

The advantages of this process are that the heat treatment is carried out on a core wire in a fixed position, so that the spirals are accurate. Spiral production and assembly are separated in space and time so that both production can be optimally organized.

Disadvantages of the process: Packing and transporting are in disordered condition, so the spirals can be deformed. Lamp design must take into account the disordered state of the spirals, so optimum spiral sizes must be avoided to prevent the spirals from sticking together. In many cases, this is not feasible, and you will have to give up auto sorting. The dimensions of the spirals belonging to the filament lamp family vary considerably. Arranging and dispensing devices therefore need to be developed separately for each.

In the other known process, the spiral is produced directly on the lamp assembly machine. The small size and e.g. in the case of filament lamps for use as auxiliary lighting, the spirals cannot be arranged automatically, but the requirements for accuracy are not strict, so that the curing of heat is permitted. In this method, the spiraling unit is placed directly on the lamp assembly machine. The coils are always wound on the same core. Here, before being cut off, the gripper grips and conveys the spirals to the point of use2 and releases it after it has been secured. These spirals are made one at a time and do not fall into an unordered set.

Advantages of Method 'A: A low-cost, productive process. The manufacturing operations are performed in one place. There is no need for special arrangement because the individually manufactured spirals are always kept in the desired positioning position by the factory pond structure. The spiral sizes can be selected according to the requirements of the filament lamp.

Disadvantages of the process: no heat treatment is applied so that the filament is warped the first time it fires. The spiral cannot be checked before installation. It is difficult to ensure the purity of the spiral. For example, if the spiral is contaminated with lubricant, it will get into the filament lamp and deteriorate its service life. The method is applicable only to single miniature spirals.

It is an object of the present invention to overcome the above disadvantages. SUMMARY OF THE INVENTION The present invention relates to a process for treating spirals wound on a core wire used primarily as a filament in filament lamps. The process is characterized in that the coils in the running meter, coiled in the core wire, are coiled with the core wire, secured thereto, placed in a known seed release device known in the art, , when used, the spiral is removed from the drum on the lamp assembly machine and its geometrical dimensions are checked. The controlled spirals found to be suitable are used for lamp production. Operations relating to the use and installation of controlled spirals are known per se.

Detailed Description of the Invention The present invention will now be described in more detail by way of accompanying drawings, which are illustrated as follows:

Figure 1 is a flowchart of the process of the invention.

Figure 2: View of the spiral holding drum.

Figure 3: Enlarged grooves of spiral holding drum.

Figure 4; Perspective view of the spiral holding drum.

Figure 5: Spiral in groove with core wire.

Figure 6: Same as Figure 5 but without core wire.

Figure 7: Process of spiral handling from storage drum to lamp mounting.

The treatment process according to the invention is shown in the flowchart. In the spiral winding operation 1, the spiral forming wire, generally tungsten wire, is wound in a known manner to continuously fed (molybdenum) core wire. In the heat treatment step 2, the heat treatment (annealing) is also carried out in a known manner with core wire. The tungsten spiral, wound on molybdenum core wire, is passed along with the core wire in a shielded gas furnace. THE 3

In the rewinding operation of -2193432, the now heat-treated coil on the core wire, which is an integral part of the present invention and is shown in Figure 2, has grooves on its surface for receiving the core wire and the coiled tungsten wire thereon. This winding operation 3 is an important element of the process according to the invention. The storage drum 8 protects the spiral in its grooves from being jammed, injured, etc. as long as the spirals are mounted in the lamps. For the winding operation 3, a winding machine equipped with optical devices is used, which enables the optical control of the spiral dimensions. The check is performed on the coil on the core wire so that the operation can be carried out quickly due to the ordered state. The next step is the 4 seed releases. Place the whole drum, in the container of the known seed release apparatus, together with the associated core wire and coil, pour the known seed release acid, which is usually a 1: 1: 1 mixture of concentrated sulfuric acid, concentrated nitric acid and water, and perform the known seed dissolution in the grooves of the storage drum, the spirals remain in a very neat order in running meters. Of course, the well-known seed washing and drying operations are also included in the closely-seeded seed release operation. Then there are the packaging, storage and shipping operations symbolized by the operations of the flow chart. The storage drum is usually packaged in shrink wrap together with the spirals in the running meter. Referring now to Fig. 7, the assembly operation 6 will be returned. Step 7 is a symbolic representation of returning the emptied drum.

Figures 2 and 3 show the most important feature of the container drum 8 according to the invention, that on its circumference there is a helical groove 10. The shape of the groove 10 is inert, its depth and pitch are greater than the diameter of the spiral 9. In the figure, the dimensions of the storage drum and groove can be selected according to the spiral dimensions _t and existing production equipment. Container drum 8 participates in steps 3 to 7 of the spiral production process shown in Figure 1 and is therefore made of a material, acid and heat resistant, which is resistant to the chemicals used in nucleation. At the ends of the storage drum 8 there are holes in which the spiral ends can be fixed.

Fig. 4 is a perspective view of the storage drum 8. Fig. 2 shows perceptibly that the spiral 9 in the running meter lies in the grooves 10 of the storage drum 8. The groove 10 passes through the surface of the storage drum 8 in a threaded manner. The storage drum 8 is fastened to the production equipment by means of 11 mounting holes.

Fig. 5 shows how the coil 9 coiled into the groove 10 is wound onto the core wire 12. Fig. 6 shows the state after the nucleation where only the coil 9 is in the groove 10.

Figure 7 is a flow diagram of the spiral usage from the storage drum to the lamp assembly. The following describes how the coil 9 of the storage drum 8 is used in the manufacture of the lamp and when mounted in the filament lamp. The storage drum 8, which is in a seed-free condition, in a ready-to-use condition, is wound on the spiral 9, unpacked and secured to the shaft 13 of the assembly machine. The strap 14 is tensioned onto the storage drum 8, which secures a spiral 9 against its relaxation over its entire length. The spiral ends are released and threaded as shown. The intermittent drive is carried out by a gear 15 while the storage drum 8 is advanced axially so that the unwinding spiral 9 is always in the same plane. Feeding at the installation rate is carried out by 16 straps; which is actuated by 17 motors intermittently. Feed continues until 18 sensors detect the spiral end. At this sensor position 18, visual or automatic control can also be performed. This operation is shown symbolically by the control device 19. If the test element of the spiral 9 is fit for installation according to the inspection of the control device 19, it is caught by the pliers 20 and cut off by the cutting blade 21 and conveyed to the place of use. If the spiral piece on the control device 19, such as a screen, cannot be used for mounting in the lamp, the assembly machine is stopped and the strap 16 is moved until a good spiral piece appears on the screen. In the next step, the pliers 20 then operate as before and the assembly machine starts again. Isolation of defective spiral pieces is possible by other methods, but this will not be further elucidated since this question does not affect the spirit of the invention. The signals from the sensor 18 are evaluated by the control unit 22 and the actuator 17 is properly operated. The sensors 23 control the downward spiral 9 and, based on their signals, the control unit 24 actuates the drive 15. Gear and sensor data is evaluated by 25 rating units to determine open or low. Based on the evaluation, various actions can be taken, such as alerting operators, shutting down the machine, etc.

The invention has several advantages over known solutions. The process allows the production of heat-treated custom spirals, but also provides a solution for automatic assembly. The 3 rewinding operations used as a new operation give you quick control and save considerable manpower and equipment after cutting off. Transport, storage and assembly can be done without damage or dirt. It is possible to check before installation.

-3193432

The mounting unit is approx. it is as complex as the cutting equipment used in the conventional process and can therefore be used economically in manual assembly. Our inventive solution can be applied simultaneously with the present state of the art technology, after appropriate additions to the field of spiral production. The introduction of our method in the field of lamp assembly enables the development of more flexible systems that can accommodate large differences in spiral power. The process can also form the basis for the development of a modern spiral assembly machine type (machine family)

Claims (1)

Patent Claim Point A method for treating spirals (9) wound on core wire (12), primarily used as filament in incandescent lamps, characterized in that the coil (9) coiled in the running meter (12) is coiled into a drum (8) with a coil (8). (8) a cylinder of acid-proof material, with a helical groove (10) on its periphery for receiving and securing at the beginning and end of the spiral (9) in the meter of flow, the coiled spiral (9) is mounted on a drum (8) the core wire (12) is released from the coil (9) of the storage drum (8) stored in a flow meter and stored in the storage drum (8) until the core-free coil (9) remaining in the storage drum (8) is used. we remove it on a lamp assembly machine and check its geometry.