SU1122461A1 - Device for feeding and clamping rod electrode tool - Google Patents

Abstract

A DEVICE FOR SUPPLY AND CLAMP OF A POWERED ELECTRODE-TOOL, containing a feed mechanism, an upper and adjustable lower stop, and a housing with an axially movable spring-loaded bushing, in a tapered bore which is mounted for axial movement of a clamping mechanism, characterized in that, in order to expand technological capabilities due to the expansion of the diameter range of the electrodes, the clamping mechanism is fulfilled in the form of at least two elements that are spring-loaded in the direction of the conical surface of the sleeve installed with the possibility of contact at the ends with the lower and upper stops, the latter having the possibility of an axial displacement and is made with a hole in which the feed mechanism rail is placed, the end of which is designed to interact with the ends of the elements of the clamping mechanism, spring-loaded direction (L upper stop.

Description

SD

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St). The invention relates to electrophysical processing methods and can be used in electric-spark copying and piercing machines specialized in flashing holes of small diameter. A known mechanism consisting of a movable collet, a tapered sleeve and an adjustable stop, in which the cone is mounted on the sleeve movably and is spring-loaded in the clamping direction of the collet, and the distance between the end of the sleeve and the adjustable stop corresponds to a predetermined gap lj. However, it is almost difficult to manufacture exact collets with an inner diameter of less than 0.2 mm, the very manufacture of grips for clamping an electrode wire with a diameter of less than 0.2 mm presents a known difficulty, you need to have a device or machine that has calibrated coaxial with high accuracy relative to the base cones bore. A set of collets must be applied to the machine for each diameter of the piercing holes. But even having a set of collets, they need to be changed each time to install a new hole diameter. In addition, it is not easy to get a wire-electric cable into the small holes in the collet. As a result, when a machine is rebuilt on a new diameter, it takes 2–2.5 hours, and sometimes more. Modern technology of producing exact collets makes it possible to obtain coaxiality of the collet axis and holes with an internal diameter of 0.1 mm within 0.02–0.03 mm. . The production of holes with a diameter of 0.1 mm in precision collets is possible only on individual plants that have special equipment. The purpose of the invention is the expansion of technological capabilities by expanding the range of electrode diameters. The goal is achieved by the fact that in the feeder and the clamp of the rod electrode tool, which contains the feed mechanism, the upper adjustable lower stops, as well as the housing with the axially movable axial bushing, in the conical hole of which the axially displaced mechanism is installed; made in the form of at least two spring-loaded elements in the direction of the conical surface of the sleeve, which are installed with the possibility of contact at the ends with the lower and upper stops, Nij has the ability to setup axial movement and provided with an opening, which accommodates the rack feed mechanism end of which is intended for engagement with the ends of the elements clamping mechanism, the spring-loaded in the direction of the upper stop. Figure 2 shows the device, a general view; figure 2 shows a clamping mechanism in the process of clamping a wire of an electrode, a section; fig.Z - the same, in the process of unclamping the wire electrode; in Fig. A, the interaction of the upper and lower stops in the process of clamping the electrode of the wire; on fig.Z the interaction of the upper and lower stops and the lower spring in the process of unclamping the electrode; Fig, 6 - the position of the upper and lower stops when clamping a thin electrode; FIG. 7 is the same when clamping a thick electrode. The device for feeding and clamping the electrode consists of a housing 1 in which a conical sleeve 3 is installed by means of a spring 2. A clip 4 made of two elements is placed in the opening of the sleeve 3. The large bases of the free clamping elements 4 are in contact with the end surface of the adjustable upper stop 5, which has a nonius 6, and the smaller base of the clamping elements 4 is compressed by a spring 7 from the lower stop 8 with a nonius 9. Through the upper stop, 5, made in the form of a hollow sleeve, passes a rail 10, one end of which is connected to a tracking system (not shown), and the second rests against the upper end of the elements of the clamp 4, wherein the force characteristic of the spring 2 is higher than the power characteristic of the spring 7 in order to ensure the output of the electrode 11 from d hoists The clamping elements 4 (Figure 2) has holes in which springs 12 are installed, Pathways to the device comprises that the vernier rotation 6 of the upper stop 5 mounted clamping elements 4 in the maximum decompressed position. The electrode 11 is inserted through the hole in the rail 10 between the clamp elements 4 and the hole

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in the nonius 9 to the detail. Using a Vernier 6, the working position of the upper stop 5 is set in such a way that the gap between the vertical planes of the clamping elements 4 in the unfolded position (Fig. 3) is 1.2-1.5 diameters of the electrode. The motor turns on, driving the rail 10, which moves downward, moves clamp 4 along the cone of sleeve 3, clamps the electrode (Figs. 2, 6 and 7), turns off the motor. The quality of the clamping is determined manually. The electrode should be clamped with a force of 0.05–0.09 kg. By turning the vernier 9, the bottom stop 8 leads to the end face of the clamp 4. The part is installed, the machine is ready for operation.

The machine works as follows.

When turned on, the motor moves the rail 10 down through the servo system, which moves the elements of the clamp 4, clamps the electrode 11, the lower end of the clamp 4 abuts the spring 7 and the lower scientific research institute the stop 8, the further movement of the electrode to the workpiece under the action of the rail 10 occurs together with

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moving the sleeve 3, the vernies 6 and 9, the clamp 4 inside the housing 1 when the spring is compressed 2. The whole system moves until the required hole is 5 in the part. After processing the parts, the motor removes the power tool. The rail 10 moves upward, the spring 2 expands, its force characteristic changes.

10 When strength characteristic

the spring 2 becomes less than the power characteristic of the spring 7, the latter lifts the clamp elements 4, and the bars 12 unclench them. Items

15 of the clamp 4, it reaches the end face of the upper stop 5 and remains in this position, while the electrode remains in place. Upon further movement of the rail 10 upward by a distance equal to the length

20 of the consumed electrode, the sleeve 3 with the clamp 4 is moved upwards by the action of the spring 2. Further processing is carried out in the same order.

25 The use of the proposed device allows setting the electrode after its replacement in 10–15 min.

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Claims (1)

DEVICE FOR FEEDING AND CLAMPING A ROD TOOL ELECTRODE-TOOL, comprising a feed mechanism, an upper and an adjustable lower stop, and a housing with an axially movable spring-loaded sleeve, in a tapered bore of which an axial displacement mechanism is installed, characterized in that, for the purpose of expanding technological capabilities by expanding the range of diameters of the electrodes, the clamping mechanism is made in the form of at least two elements spring-loaded in the direction of the conical surface of the sleeve installed with the possibility of contacting the ends with the lower and upper stops, while the latter has the possibility of axial mounting movement and is made with a hole in which there is a rail of the feed mechanism, the end of which is designed to interact with the ends of the elements of the clamp mechanism, spring-loaded in the direction of the upper stop.