CN108907538B - A multifunctional backing plate and auxiliary welding system for welding - Google Patents

Abstract

The invention relates to a multifunctional backing plate for welding and an auxiliary welding system, wherein the multifunctional backing plate can be used for preheating a welded workpiece before welding, radiating the welded workpiece in the welding process and providing gas protection for the welded workpiece in the welding process; the multifunctional backing plate provided by the invention has the advantages of compact structure, multiple functions, good universality and wide application range, and can effectively avoid the defects in the prior art.

Description

A multifunctional backing plate and auxiliary welding system for welding

Technical field

The invention relates to the technical field of welding equipment, and in particular to a multifunctional backing plate for welding and an auxiliary welding system.

Background technique

Welding is a common process in industry. In the existing technology, when welding is performed, it is usually necessary to place a backing plate under the workpiece.

For example, in the existing technology, workpieces that need to be preheated before welding usually need to be heated by flame or resistance furnace and then transferred to the welding workbench for clamping. Not only is the process cumbersome, but the high-temperature workpieces after preheating are also Transferring and clamping are very inconvenient. At this time, it is usually necessary to set a backing plate between the workpiece and the workbench to protect the workbench and support the workpiece; for workpieces with poor welding thermal conductivity or workpieces that require continuous welding for a long time, in order to prevent the workpiece from Severe overheating deformation and excessive thermal stress lead to thermal cracks in the weld, and a copper backing plate is usually required for heat dissipation; when welding active metal workpieces, the back of the weld is prone to oxidation, so during welding, it is usually necessary to use a backing plate to dissipate heat. The shielding gas is delivered to the back of the weld.

However, in the prior art, the backing plates commonly used in the welding process usually have the disadvantages of single function and poor versatility.

Contents of the invention

In order to improve the shortcomings in the prior art, the technical solutions adopted by the present invention are:

A multifunctional pad for welding, which can be used to preheat the workpiece before welding, dissipate heat during the welding process, and provide gas to the workpiece during the welding process. Protect.

Preferably, the multifunctional pad includes an upper pad used to preheat the workpiece to be welded and to provide gas protection for the back of the weld, and a lower pad used to dissipate heat.

In one solution, a gas protection tank and several heating elements are provided in the upper pad. The gas protection tank is used to accommodate protective gas, and the heating elements are used to heat the upper pad. Thereby heating the workpiece to be welded.

Optionally, the gas protection groove includes a vent hole and a slot. One end of the vent hole is used to connect the air inlet pipe. The vent hole runs through both ends of the upper pad. The slot runs through both ends of the upper pad. The vent hole and the upper surface of the upper pad are connected along the length direction of the vent hole.

Preferably, the ventilation hole is a round hole.

Further, one or both ends of the vent hole are provided with internal threads, and the internal threads are used for threaded connection. That is, it is convenient to connect the air inlet pipe and the gas protection tank through threads.

Preferably, the upper pad is provided with a plurality of through holes, the through holes are respectively provided on both sides of the gas protection groove, and the through holes are used to accommodate the heating element. That is, the heating element is arranged in the through hole.

Optionally, the heating element is a resistance wire.

Preferably, both the upper pad and the lower pad are rectangular flat plates.

In one solution, the lower pad is provided with a groove, one end of the lower pad is provided with a water inlet, and the other end is provided with a water outlet. The water inlet and the water outlet are respectively connected with the groove, and the water inlet and The water outlets are respectively used to connect pipes, the lower pad is connected to the upper pad, and the groove is closed by the upper pad, and the groove is used to accommodate cooling water.

Preferably, the water inlet and/or the water outlet are provided with internal threads, and the internal threads are used for threaded connection.

Preferably, the upper pad and the lower pad are made of copper plates.

An auxiliary welding system includes a protective gas bottle, a circulation pump, a water tank and the aforementioned multi-functional pad. The protective gas bottle is connected to one end of the gas protection tank through an air inlet pipe, and the protective gas bottle is used to store protective gas. The water inlet, circulation pump, water tank and water outlet are connected through pipelines in sequence and form a circulation loop, and each heating element is connected in parallel to the power supply.

Compared with the existing technology, the use of a multifunctional pad for welding and an auxiliary welding system provided by the present invention has the following beneficial effects:

1. This multi-functional backing plate has compact structure, diverse functions, good versatility and wide application range, and can effectively avoid the disadvantages of the existing technology.

2. This multi-functional pad has a built-in heating element that can preheat the workpiece to be welded. It is especially suitable for workpieces that need to be preheated before welding. It can reduce the need to transfer the workpiece after heating it with a resistance furnace or flame. The process of clamping on the workbench is very convenient and can effectively improve work efficiency.

3. This multi-functional backing plate has a built-in circulating water cooling device, which can perform forced heat dissipation. It is especially suitable for workpieces with poor thermal conductivity or workpieces that require continuous welding for a long time. This multi-functional backing plate can play a good role in the welding process. The heat dissipation effect prevents the workpiece to be welded and the workbench from overheating, causing serious deformation of the workpiece to be welded, thermal cracks and other disadvantages, which is beneficial to continuous welding and obtaining high-quality welds.

4. This multi-functional backing plate can provide gas protection for the back of the weld during the welding process, and is especially suitable for gas shielded welding of active metal workpieces.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present invention more clearly, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and therefore do not It should be regarded as a limitation of the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic structural diagram of an upper pad in a multifunctional pad for welding provided in Embodiment 1 of the present invention.

Figure 2 is a front view of Figure 1.

Fig. 3 is a schematic structural diagram of the upper gasket provided in Fig. 1 after being provided with an air inlet pipe.

Figure 4 is a schematic structural diagram of the upper backing plate provided in Figure 1 when a resistance wire is provided.

Figure 5 is a schematic structural diagram of a lower pad in a multifunctional pad for welding provided in Embodiment 1 of the present invention.

Figure 6 is a schematic structural diagram of the lower pad provided in Figure 5 with pipes respectively provided for the water inlet and water outlet.

7 is a schematic diagram of an upper pad and a lower pad being assembled in a multifunctional pad for welding provided in Embodiment 1 of the present invention.

Figure 8 is a schematic diagram of Figure 7 after assembly is completed.

Figure 9 is a schematic structural diagram of an auxiliary welding system provided in Embodiment 2 of the present invention.

Description of markings in the figure

Multifunctional pad 101,

Upper pad 201, gas protection groove 202, ventilation hole 203, slot 204, through hole 205, resistance wire 206, air inlet pipe 207, wire 208, power supply 209,

Lower pad 301, groove 302, water inlet 303, water outlet 304, pipe 305,

Protective gas cylinder 401, circulation pump 402, water tank 403.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the appended drawings is not intended to limit the scope of the claimed invention, but rather to represent selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without any creative work fall within the scope of protection of the present invention.

The invention provides a multifunctional backing plate for welding, which can be used to preheat the workpiece to be welded before welding, to dissipate heat from the workpiece to be welded during the welding process, and to Provide gas protection for the workpiece to be welded.

For welded workpieces that need to be preheated before welding, they can be placed directly on this multi-functional backing plate, and then fixed on the welding workbench for direct preheating, which reduces the need to transfer the workpiece after heating it with a resistance furnace or flame. The process of clamping on the workbench is very convenient and can effectively improve work efficiency;

For workpieces with poor thermal conductivity or workpieces that require continuous welding for a long time, this multi-functional backing plate can have a good heat dissipation effect during the welding process, thereby preventing the workpiece and workbench from overheating and causing serious deformation of the workpiece. , thermal cracks and other disadvantages, so that continuous welding can be effectively achieved and high-quality welds can be obtained;

When the workpiece to be welded is an active metal, the back of the weld is prone to oxidation. Therefore, during welding, this multi-functional backing plate can deliver protective gas to the back of the weld, thereby easily realizing the function of gas protection of the back of the active metal.

Example 1

The multifunctional backing plate for welding provided in Embodiment 1 includes an upper backing plate 201 and a lower backing plate 301. The lower backing plate 301 is disposed below the upper backing plate 201 and is integrated with the upper backing plate 201. The upper backing plate 201 can be used to preheat the workpiece to be welded, and can also be used to provide gas protection for the back of the weld during the welding process. The lower backing plate 301 is mainly used for heat dissipation to speed up the heat loss during the welding process and avoid The workpiece to be welded and the workbench are overheated.

In one solution, a gas protection groove 202 and several heating elements are provided in the upper pad 201. The gas protection groove 202 is used to accommodate protective gas; in this embodiment, the gas protection groove 202 includes a ventilation hole 203 and a slot 204. As shown in Figures 1 and 2, the vent hole 203 is a round hole (cylindrical) for connecting the air inlet pipe 207. The vent hole 203 penetrates both ends of the upper pad 201; at the same time, the notch 204 also penetrates the upper pad. 201, and along the length direction of the vent hole 203, the notch 204 can connect the vent hole 203 with the upper surface of the upper backing plate 201, as shown in Figure 1 or Figure 2, during the gas shielded welding process The air inlet pipe 207 used to transport the protective gas can be connected to either end of the vent hole 203. As shown in Figure 3, the protective gas can enter the vent hole 203 of the gas protection slot 202 from the air inlet pipe 207 and pass through the slot 204. Overflows the upper surface of the upper backing plate 201, thereby providing gas protection to the back of the weld seam of the workpiece to be welded above the upper surface of the upper backing plate 201, which is especially suitable for welding active metal workpieces.

In order to facilitate the connection of the air inlet pipe 207, in one solution, an internal thread can be provided at one end of the gas shielding groove 202, and an external thread can be provided at the end of the air inlet pipe 207. When gas shielded welding is required, through the cooperation of the external thread and the internal thread, The connection between the air inlet pipe 207 and the gas protection tank 202 can be realized conveniently and quickly.

When using this multi-functional backing plate, the workpiece to be welded is usually placed above the upper backing plate 201, and the weld seam of the workpiece to be welded corresponds to the gas protective groove 202 below; therefore, preferably, the gas protective groove 202 is provided on the upper layer. at the middle position of the pad 201.

The heating element is used to heat the upper pad 201 when needed, thereby heating the workpiece to be welded; in this embodiment, the upper pad 201 is provided with a number of through holes 205, as shown in Figure 1 or Figure 2 or Figure 3 As shown, the through holes 205 are respectively provided on both sides of the gas protection groove 202, and the heating elements are respectively provided in the corresponding through holes 205.

The heating element can heat the upper backing plate 201, and the workpiece to be welded is in contact with the upper backing plate 201, so the workpiece to be welded can be indirectly heated (preheated). In a feasible solution provided by this embodiment, the heating element uses The two ends of the resistance wire 206 (or heating wire) in each through hole 205 are connected in parallel to the power supply 209 through the wires 208, thereby utilizing the characteristics of the resistance wire 206 to generate heat in the energized state to achieve the heating function.

In actual production and manufacturing, the number of through holes 205 on the upper pad 201 can be determined according to actual needs. As shown in Figure 4, in this embodiment, four through holes 205 are provided on the upper pad 201. Two through holes 205 are respectively provided on both sides of the protection groove 202, and a resistance wire 206 is provided in each through hole 205.

In one solution, the lower pad 301 is provided with a groove 302. The groove 302 is used to accommodate cooling water (also known as circulating water, cooling liquid, etc.). One end of the lower pad 301 is provided with a water inlet 303, and the other end is provided with a water inlet 303. There is a water outlet 304, as shown in Figure 5, the water inlet 303 and the water outlet 304 are respectively connected with the groove 302, and the water inlet 303 and the water outlet 304 are respectively used to connect the pipe 305, as shown in Figure 6, the lower layer The pad 301 is connected to the upper pad 201 and seals the groove 302 through the upper pad 201, as shown in Figures 7 and 8; when using this multi-functional pad to assist in welding, the cooling water can flow from the water inlet 303 enters the groove 302 and can accumulate in the groove 302. The heat generated by the welding process is transferred from the upper pad 201 to the cooling water in the groove 302, and is taken away from the pad by the cooling water flowing out of the water outlet 304. ; In this solution, circulating cooling water is used to force-cool the backing plate, which can effectively prevent the workpiece to be welded and the workbench from overheating, thereby achieving a good heat dissipation effect. It is especially suitable for welding workpieces with poor thermal conductivity or that require continuous welding for a long time. Welding workpiece.

Optionally, the connection between the lower pad 301 and the upper pad 201 may be welded.

In order to facilitate connection, in one solution, internal threads can be provided in the water inlet 303 and the water outlet 304 respectively, and the pipe 305 used to connect the water inlet 303 and the water outlet 304 is provided with external threads. When the connection is made, the external threads are used Cooperating with the internal thread, the connection between the pipe 305 and the water inlet 303 and the pipe 305 and the water outlet 304 can be realized conveniently and quickly.

Optionally, as shown in Figure 7 or Figure 8, in this embodiment, the upper pad 201 and the lower pad 301 are both rectangular flat plates with regular shapes, which are convenient for processing and use with the workbench.

Further, in this embodiment, the upper pad 201 and the lower pad 301 can be made of copper plates respectively. The copper plate has good heat transfer effect, which facilitates the multi-functional pad to preheat or dissipate the heat of the workpiece to be welded. Can be transferred quickly.

Example 2

This embodiment provides an auxiliary welding system, including a protective gas bottle 401, a circulation pump 402, a water tank 403 and the multi-functional backing plate provided in Embodiment 1, where the protective gas bottle 401 is used to contain protective gas, as shown in Figure As shown in 9, the protective gas bottle 401 is connected to one end of the gas protective tank 202 through the air inlet pipe 207; the water tank 403 is used to contain cooling water, and the water inlet 303, the circulation pump 402, the water tank 403 and the water outlet 304 are connected in turn through the pipe 305. A circulation loop is formed, as shown in Figure 9. The cooling water can circulate in the circulation loop to achieve a good forced cooling effect; both ends of each heating element (resistance wire 206 is preferred) are connected in parallel to the power supply 209 through wires 208. In a further solution, a distribution box is also included. At this time, both ends of each heating element (resistance wire 206 is preferred) can be connected in parallel to the distribution box through wires 208 to facilitate centralized control and management.

In this embodiment, the circulation pump 402 is used to provide power for circulating cooling water. The circulation pump 402 is a commonly used power device in the prior art and will not be described again here.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention. should be covered by the protection scope of the present invention.

Claims (4)

1. The utility model provides a multifunctional backing plate for welding, its characterized in that both can be used to preheats the welded work piece before the welding, can be used to dispel the heat to the welded work piece in the welding process again, still can be used to provide gas protection to the welded work piece in the welding process, including upper backing plate and lower floor's backing plate, upper backing plate is used for preheating the welded work piece to be used for providing gas protection for the welding seam back, lower floor's backing plate is used for the heat dissipation, be provided with gas protection groove and a plurality of heating element in the upper backing plate, gas protection groove is used for holding the protection gas, heating element is used for heating upper backing plate, gas protection groove includes air vent and notch, and the one end of air vent is used for connecting the intake pipe, and the air vent runs through the both ends of upper backing plate, the notch runs through the both ends of upper backing plate, and at the length direction intercommunication of air vent with the upper backing plate's upper surface, the lower floor's backing plate is provided with the recess, and the one end of lower floor's backing plate is provided with the delivery port, water inlet and delivery port respectively with the recess intercommunication, water inlet and delivery port respectively are used for connecting the pipeline respectively in the upper backing plate and a plurality of heating elements, the upper backing plate and lower backing plate and through the upper backing plate and water layer, the water inlet and the water layer, the water inlet is used for holding the screw thread is used for holding the inner layer, the inner layer is used for the cooling.

2. The multifunctional cushion plate for welding according to claim 1, wherein the upper cushion plate is provided with a plurality of through holes, the through holes are respectively arranged at two sides of the gas protection groove, and the through holes are used for accommodating the heating element.

3. The multifunctional cushion for welding according to claim 2, wherein the heating element is a resistance wire.

4. The auxiliary welding system is characterized by comprising a protective gas cylinder, a circulating pump, a water tank and the multifunctional backing plate according to any one of claims 1-3, wherein the protective gas cylinder is connected with one end of the gas protective tank through an air inlet pipe and is used for storing protective gas, the water inlet, the circulating pump, the water tank and the water outlet are communicated through pipelines in sequence and form a circulating loop, and the heating elements are respectively connected in parallel with a power supply.