RU140665U1 - DEVICE FOR FEEDING THE BATTERY IN THE WELDING ZONE OR FILLING OF THE ADDITIVE MATERIAL - Google Patents

Abstract

1. A device for feeding the charge into the zone of welding or surfacing of filler material, comprising a housing with a loading window, a feeding channel and a nozzle, a feeding screw, auger drive and a hopper connected to the loading window of the housing, characterized in that the hopper is equipped with a regulator of the feed-through section of the loading window while the feed channel is made with a constant diameter along the entire length of the channel, and the screw is installed in the feed channel with a gap of 1-2.5 mm relative to the channel wall. 2. The device according to claim 1, characterized in that the regulator of the feed-through section of the loading window is made in the form of a shutter pivotally mounted on the walls of the hopper and is equipped with a drive for moving the shutter. 3. The device according to claim 2, characterized in that the shutter movement actuator is made in the form of a screw pair.

Description

Technical field

The utility model relates to the field of restoration and hardening of the surface of parts, for example, blades of working bodies of tillage implements of agricultural machinery. One of the promising areas of surface restoration of parts is welding / surfacing of filler material on the surface of the part using a charge. For welding / surfacing of filler material, devices are required for applying the charge to the surface of the workpiece.

State of the art

A device for applying a paste-like material on the surface of parts is known, comprising a hollow body with a loading window, a hopper, a forming nozzle and a screw located in the channel of the body connected to the drive. The housing channel has an inlet conical section and a cylindrical section connected to it. The output diameter of the conical section is equal to the diameter of the screw (RF patent No. 806837 IPC E04F 21/06, 23.92.1981). The known device has limited possibilities for regulating the feed mode of the paste-like material, both when the flow rate changes, and when the composition of the charge is changed.

Utility Model Essence

The main problem that needs to be solved when regulating the filler material (charge) supply to the welding / welding zone is the composition of the mixture, the viscosity characteristics of which change significantly when switching to another mixture, and a wide range of the charge consumption depending on the technical requirements for the welding process / surfacing. The filler materials used for welding contain a large amount of solid powders (carbides and nitrides of metals, refractory metals, ceramic powders, etc.) with a wide change in their fractional composition. It should be borne in mind that the charge in its characteristics refers to non-Newtonian fluids.

The objective of the utility model is to develop a charge supply device in which the charge supply mode can be adjusted in accordance with the required charge flow rate, which can successfully work with high-viscosity non-Newtonian fluids in a wide range of variation of the viscosity characteristics of the charge in order to ensure the optimal feed rate of the charge into the welding / surfacing zone filler material.

To solve this problem, a charge supply device is proposed, comprising a housing with a loading window, a feed channel and a nozzle, a feed screw, auger drive and a hopper,

attached to the loading window of the housing, in which the hopper is equipped with a regulator of the feed-through section of the loading window, the feeding channel being made with a constant diameter along the entire length of the channel and the screw is installed in the feeding channel with a gap of 1-2.5 mm relative to the channel wall.

In addition, the regulator of the bore of the loading window is made in the form of a shutter pivotally mounted on the walls of the hopper, and is equipped with a drive for moving the shutter.

Preferably, the shutter movement actuator is in the form of a screw pair.

The implementation of the feed channel with a constant cross section along the entire length of the channel ensures a constant operating conditions when feeding the charge through the channel using the feed screw along the entire length of the feed channel. The installation of the feed screw in the feed channel with a constant gap of 1-2.5 mm relative to the channel wall ensures successful regulation of the flow of viscous non-Newtonian fluids in a wide range of changes in their characteristics, since it provides a controlled flow of the charge through the gap between the wall of the feed channel and the screw. With a gap of less than 1 mm, there is a sharp increase in friction losses during the rotation of the screw, since dispersed particles of the charge can form conglomerates, the sizes of which are comparable to this minimum gap, and they can “get stuck” in the gap and require additional energy for the destruction of these conglomerates. This causes an overload of the drive of the feed screw 4, or can lead to a decrease in the rotation speed of the feed screw 4 and a decrease in the supply of charge to the welding zone. With an increase in the gap of more than 2.5 mm, there is an increased flow of the mixture through the gap. Equipping the hopper with a regulator of the feed-through section of the loading window ensures that the size of the loading window is matched with the required charge consumption, which ensures optimal conditions for the charge to enter the feeding screw, in particular, it is possible to ensure a constant flow rate of the mixture into the feeding screw through the loading window and, at the specified constant clearance between the feeding auger and the wall of the feed channel, the invariability of the conditions of supply of the mixture into the working area when the charge consumption changes.

The implementation of the regulator of the bore of the loading window in the form of a shutter with a screw drive simplifies the regulation of the device when changing the feed mode of the charge in the welding zone.

The technical result from the use of the proposed device for applying the mixture is to improve the quality of welding of filler material by ensuring the constancy of the conditions for its supply to the welding zone and increasing the reliability of the device.

Brief Description of the Drawings

The proposed device is illustrated by drawings.

In FIG. 1 shows a longitudinal section of the proposed device for feeding the mixture.

In FIG. 2 shows a section Α-A in FIG. 1 (the dashed line shows the shutter in a deviated position).

Utility Model Example

The charge feeding device consists of a housing 1 mounted on the drive 2. In the spindle 3 of the drive 2, a feeding screw is fixed 4. The housing 1 has a feeding channel 5 with a constant diameter along the entire length of the channel and a replaceable nozzle 6. The feeding screw 4 enters the feeding channel 5 and installed in it with a gap relative to the wall of the supply channel 5. The gap is 1-2.5 mm. The device is equipped with a hopper 7 connected to the loading window of the housing 1. The device for feeding the charge is equipped with a feed-through section of the loading window for regulating the charge flow, made in the form of a shutter 8, mounted on the side walls of the hopper 7 with hinges 9. The controller of the passage of the loading window is equipped with an actuator for moving the shutter 8, made in the form of a screw pair. In a specific embodiment, the nut 10 of the screw pair is mounted on the wall of the hopper 7, and the screw 11 of the screw pair passes through the nut 10 and acts on the shutter 8 with its end face.

The proposed device operates as follows. A portion of the charge (filler material) is loaded into the hopper 7. Through the loading window of the housing, the charge enters the feed screw 4. The feed screw 4 captures the charge and moves it into the feed channel 5 and then through the nozzle 6 feeds the charge into the welding zone of the filler material. If conglomerates can form in the charge, then with the selected range of the gap between the feed screw 4 and the wall of the feed channel 5, the charge will be freely fed into the nozzle 6. The charge moves along the feed channel 5 without jamming.

When reducing the charge rate with the screw 11, deflect the shutter 8 (shown by a dotted line), partially blocking the loading window of the housing 1. The movement of the shutter 8 is determined by the change in flow rate and it is preferable to deflect the shutter 8 so as to maintain a constant flow rate of the charge into the feed screw 5 when the flow rate changes This ensures the stability of the conditions of capture of the charge by the feeding screw 5, which increases the reliability of the device for feeding the charge and ensures the stability of the characteristics of the feed mixture.

For the same purpose, the adjustment of the bore of the loading window of the housing may also be necessary when replacing the replaceable nozzle 6, for example, when switching to a nozzle with a smaller bore.

Thus, the proposed device can work with a mixture of different composition having different rheological characteristics without violating the mode of supply of the mixture into the welding zone.

Claims (3)

1. A device for feeding the charge into the zone of welding or surfacing of filler material, comprising a housing with a loading window, a feeding channel and a nozzle, a feeding screw, auger drive and a hopper connected to the loading window of the housing, characterized in that the hopper is equipped with a regulator of the feed-through section of the loading window while the feed channel is made with a constant diameter along the entire length of the channel, and the screw is installed in the feed channel with a gap of 1-2.5 mm relative to the channel wall. 2. The device according to claim 1, characterized in that the regulator of the feed-through section of the loading window is made in the form of a shutter pivotally mounted on the walls of the hopper, and is equipped with a drive for moving the shutter. 3. The device according to p. 2, characterized in that the shutter movement actuator is made in the form of a screw pair.

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