Resistance welding device with small thermal shock

Abstract

The utility model discloses a resistance welding device with small thermal shock, which comprises a bottom table, a welding top frame, a welding table and a welding bottom frame, in the using process of the resistance welding device, a gas collecting bin transmits heat gas into a circulating spray pipe through a transmission pipeline, and then the circulating spray pipe sprays the heat gas to a preheating bin part; according to the welding method, the welding resistor in the preheating bin is preheated, so that the internal thermal shock effect is reduced when the welding resistor is welded, and in the welding step, an operator places a preheated resistor material in a placement cavity and then drives a movable air cylinder on an air cylinder frame to move; the movable end of the movable air cylinder can drive the first-stage welding device to gradually move to the surface of the resistor material, after the first-stage welding device moves in place, an operator can conduct welding operation on the resistor material through the first-stage welding head and the second-stage welding head, and therefore the normal welding step of the resistor is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to resistance welding technical field, concretely is a kind of resistance welding device with little thermal shock. BACKGROUND

[0002] Resistance welding is a method of welding by using the heat generated by the resistance of current passing through the welding parts and the contact parts as heat source to locally heat the welding parts, and simultaneously applying pressure. During welding, no filler metal is needed, the production rate is high, and the deformation of welding parts is small. Resistance welding is a method of forming metal bond by heating the workpiece to melting or plastic state using the heat effect generated by the resistance of current passing through the contact surface and adjacent area of the workpiece. There are four main resistance welding methods, namely spot welding, seam welding, projection welding and butt welding.

[0003] Thermal shock refers to the phenomenon that when a object is subjected to rapid heating or cooling, a large amount of heat exchange occurs in a short period of time, and the temperature changes dramatically, resulting in impact thermal stress. When metal materials are subjected to rapid heating and cooling, a large temperature difference is generated inside the materials, resulting in a large impact thermal stress. This phenomenon is called thermal shock. A large thermal shock can generate thermal stress that exceeds the yield limit of the material, leading to damage to the metal parts.

[0004] In the prior art, a resistance welding device is disclosed in publication "CN219358250U". The welding device comprises a machine table, a two-axis mechanical hand, a welding head one, a welding head two, a welding head horizontal linear driving mechanism and a power source. The two-axis mechanical hand is installed on the machine table, and the moving end of the two-axis mechanical hand is fixed with the welding head horizontal linear driving mechanism. The cylinder body of the welding head horizontal linear driving mechanism is fixed with the welding head one, and the moving end of the welding head horizontal linear driving mechanism is fixed with the welding head two. The welding head one and the welding head two are electrically connected to the power source. The two-axis mechanical hand drives the welding head to move horizontally up and down. The opening and closing of the two welding heads are driven by the welding head horizontal linear driving mechanism. The opening and closing of the two welding heads are used to adapt to different sizes of fork seats, and the connection between the fork seat and the diode pin is welded. The present application saves the welding cost.

[0005] However, the prior art still has some shortcomings, such as:

[0006] The above device and the prior art lack preheating treatment of the resistance material before resistance welding. During welding, the temperature of the resistance part changes dramatically, and excessive thermal shock is generated inside the resistance material, resulting in damage to the metal material inside the resistance material. UTILITY MODEL CONTENT

[0007] The utility model aims to provide a resistance welding device with little thermal shock to solve the problems raised in the background art.

[0008] In order to achieve the above object, the utility model provides following technical scheme: a resistance welding device with small thermal shock, including bottom platform, welding top frame, welding table and welding chassis, welding top frame is installed in the bottom platform top, welding table is arranged between welding top frame and bottom platform, welding table is installed in one side of welding top frame, welding table surface one side is provided with the cavity of placing, welding chassis is arranged in the welding table bottom, welding chassis is also installed in one side of welding top frame;

[0009] Resistance surface welding heat access preheating unit is arranged in one side of welding top frame and welding chassis.

[0010] Preferably, the resistance surface welding heat access preheating unit includes a heat absorption part, the heat absorption part includes a pipe rack, the pipe rack is symmetrically arranged as two groups, two groups of side gas boxes are symmetrically mounted on the surface of the pipe rack, the side gas boxes are installed obliquely, a filter box is communicatively mounted on the surface of the side gas box, and an air inlet groove is arranged on the surface of the filter box.

[0011] Preferably, the resistance surface welding heat access preheating unit further includes a heat dissipation part, the heat dissipation part includes a heat absorption pipeline, the heat absorption pipeline is arranged in several groups at intervals, a gas collection bin is mounted on one side of the pipe rack, the several groups of heat absorption pipelines are in communication with the gas collection bin, a transmission pipeline is also communicatively mounted on the surface of the gas collection bin, one end of the transmission pipeline penetrates through the pipe rack, a preheating bin is arranged between adjacent pipe racks, and a circulating jet pipe is communicatively mounted on one end of the transmission pipeline, and one end of the circulating jet pipe faces the preheating bin.

[0012] Preferably, a cylinder frame is mounted on one side of the welding top frame, a movable cylinder is arranged on the top of the cylinder frame, the output end of the movable cylinder penetrates through the cylinder frame movably, a first-level welding device is mounted on the output end of the movable cylinder, a first-level welding head is arranged on one side of the first-level welding device, a second-level welding device is arranged on the top of the welding chassis close to one side of the cylinder frame, and a second-level welding head is arranged on one side of the second-level welding device.

[0013] Preferably, an airflow limiting unit is arranged outside the placing cavity.

[0014] Preferably, the airflow limiting unit includes a vertical baffle, the vertical baffle is arranged on the top of the preheating bin, and the vertical baffle is mounted between adjacent pipe racks.

[0015] Preferably, the airflow limiting unit further includes a blocking cover, the blocking cover is mounted on the surface of the pipe rack through an electric hinge, and the blocking cover is symmetrically arranged as two groups.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] 1. When in use, the gas collecting bin will transmit the heat gas to the inside of the circulating nozzle through the transmission pipeline, then the circulating nozzle will spray the heat gas to the preheating bin part, so as to preheat the welding resistance inside the preheating bin, and reduce the internal thermal shock effect of the welding resistance during welding;

[0018] 2. When in use, when the welding step is carried out, the operator places the resistance material which has been preheated in the placing cavity, then the operator drives the movable cylinder on the cylinder frame to move, the movable cylinder moving end drives the first welding device to move to the surface of the resistance material step by step, when the first welding device is moved to the position, the operator can weld the resistance material through the first welding head and the second welding head, so as to ensure the normal welding step of the resistance. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the whole schematic view of the device of the utility model;

[0020] Figure 2 It is the schematic view of the welding table and the placing cavity part in the utility model;

[0021] Figure 3 It is the schematic view of the preheating bin and the circulating nozzle part in the utility model;

[0022] Figure 4 It is the schematic view of the filter box and the air inlet groove part in the utility model.

[0023] In the drawing: 1, bottom table; 2, welding top frame; 21, cylinder frame; 22, movable cylinder; 23, first welding device; 24, first welding head; 3, welding table; 31, placing cavity; 4, welding bottom frame; 41, second welding device; 42, second welding head; 5, pipe frame; 51, gas collecting bin; 52, transmission pipeline; 53, preheating bin; 54, vertical baffle; 55, circulating nozzle; 6, side gas box; 61, filter box; 62, air inlet groove; 63, heat absorption pipeline; 7, blocking cover. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0025] Please refer to Figures 1-4 The utility model provides a technical scheme:

[0026] Embodiment one: a resistance welding device with small thermal shock: including a base table 1, a welding top frame 2, a welding table 3 and a welding bottom frame 4, the welding top frame 2 is installed on the top of the base table 1, the welding table 3 is arranged between the welding top frame 2 and the base table 1, the welding table 3 is installed on one side of the welding top frame 2, and a placing cavity 31 is arranged on one side of the surface of the welding table 3, and the welding bottom frame 4 is arranged at the bottom of the welding table 3, and the welding bottom frame 4 is also installed on one side of the welding top frame 2;

[0027] A cylinder frame 21 is installed on one side of the welding top frame 2, an active cylinder 22 is arranged on the top of the cylinder frame 21, the output end of the active cylinder 22 is movably penetrated through the cylinder frame 21, a first-level welding device 23 is installed on the output end of the active cylinder 22, a first-level welding head 24 is arranged on one side of the first-level welding device 23, and a second-level welding device 41 is arranged on the top of the welding bottom frame 4 close to one side of the cylinder frame 21, and a second-level welding head 42 is arranged on one side of the second-level welding device 41.

[0028] The resistance surface welding heat storage and preheating unit is arranged on one side of the welding top frame 2 and the welding bottom frame 4;

[0029] The resistance surface welding heat storage and preheating unit comprises a heat absorption part, the heat absorption part comprises a pipe frame 5, the pipe frame 5 is symmetrically arranged in two groups, two groups of side gas boxes 6 are symmetrically installed on the surface of the pipe frame 5, the side gas boxes 6 are inclinedly installed, filter boxes 61 are communicatively installed on the surface of the side gas boxes 6, and air inlet grooves 62 are arranged on the surface of the filter boxes 61.

[0030] The resistance surface welding heat storage and preheating unit further comprises a heat discharge part, the heat discharge part comprises heat absorption pipelines 63, the heat absorption pipelines 63 are arranged in several groups at intervals, a gas collection bin 51 is installed on one side of the pipe frame 5, the several groups of heat absorption pipelines 63 are in communication with the gas collection bin 51, a transmission pipeline 52 is also communicatively installed on the surface of the gas collection bin 51, one end of the transmission pipeline 52 penetrates through the pipe frame 5, a preheating bin 53 is arranged between adjacent pipe frames 5, a circulating spray pipe 55 is communicatively installed on one end of the transmission pipeline 52, and one end of the circulating spray pipe 55 faces the preheating bin 53.

[0031] In this embodiment, the filter boxes 61 filter the heat gas, the filtered heat gas enters the inside of the gas collection bin 51 through the heat absorption pipelines 63, the heat gas is transmitted to the inside of the circulating spray pipe 55 through the transmission pipeline 52, then the circulating spray pipe 55 sprays the heat gas to the preheating bin 53, so that the welding resistance in the preheating bin 53 is preheated, and the internal thermal shock effect of the welding resistance is reduced during welding.

[0032] An air flow limiting unit is arranged outside the placing cavity 31.

[0033] The air flow limiting unit comprises a vertical baffle 54, the vertical baffle 54 is arranged on the top of the preheating bin 53, and the vertical baffle 54 is installed between adjacent pipe frames 5.

[0034] The airflow limiting unit further comprises a blocking cover 7, which is mounted on the surface of the pipe frame 5 through an electric hinge, and is symmetrically arranged in two groups.

[0035] In this embodiment, when welding starts, the operator can drive the two groups of blocking covers 7 to close by the installed electric hinge. After the two groups of blocking covers 7 are closed, the welding area is blocked on one side, so that the heat gas in this area is concentrated for processing, further improving the preheating utilization rate of the heat generated by welding.

[0036] Working principle: During use, the operator places the resistance material to be welded in the preheating bin 53, and then starts the preheating of the primary welder 23 and the secondary welder 41. When the primary welder 23 and the secondary welder 41 are started, a large amount of heat is generated. Then the operator drives the side gas box 6 to adsorb and utilize the heat gas. The heat gas enters the filter box 61 through the gas inlet groove 62. The filter box 61 filters the heat gas. The filtered heat gas enters the gas collection bin 51 through the heat absorption pipeline 63. The gas collection bin 51 transmits the heat gas to the circulating nozzle 55 through the transmission pipeline 52. Then the circulating nozzle 55 sprays the heat gas to the preheating bin 53, so as to preheat the welding resistance in the preheating bin 53, reducing the internal thermal shock effect of the welding resistance during welding.

[0037] When welding, the operator places the resistance material that has been preheated in the placement cavity 31. Then the operator drives the movable cylinder 22 on the cylinder frame 21 to move. The moving end of the movable cylinder 22 drives the primary welder 23 to move to the surface of the resistance material. When the primary welder 23 is in place, the operator can weld the resistance material through the primary welding head 24 and the secondary welding head 42, so as to ensure the normal welding step of the resistance.

[0038] The heat generated by welding can also enter the filter box 61 through the gas inlet groove 62. When the heat gas enters the filter box 61, it can reduce the heat accumulation problem of the welding area, avoid the high environmental temperature during welding, and cause excessive internal thermal shock of the resistance welding. At the same time, the filter box 61 filters the welding heat gas. When welding starts, the operator can drive the two groups of blocking covers 7 to close by the installed electric hinge. After the two groups of blocking covers 7 are closed, the welding area is blocked on one side, so that the heat gas in this area is concentrated for processing, further improving the preheating utilization rate of the heat generated by welding.

[0039] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A resistance welding device having low thermal shock, characterized by: It includes the bottom platform (1), the welding top frame (2), the welding platform (3) and the welding bottom frame (4), the welding top frame (2) is installed on the top of the bottom platform (1), the welding platform (3) is arranged between the welding top frame (2) and the bottom platform (1), the welding platform (3) is installed on one side of the welding top frame (2), one side of the surface of the welding platform (3) is provided with a placing cavity (31), the welding bottom frame (4) is arranged at the bottom of the welding platform (3), and the welding bottom frame (4) is also installed on one side of the welding top frame (2); Resistance surface welding heat access preheating unit, the resistance surface welding heat access preheating unit is arranged on one side of the welding top frame (2) and the welding bottom frame (4).

2. A resistance welding device having low thermal shock according to claim 1, characterized in that: The resistance surface welding heat access preheating unit includes a heat absorbing part, the heat absorbing part includes a pipe frame (5), the pipe frame (5) is symmetrically provided as two groups, two groups of side gas boxes (6) are symmetrically mounted on the surface of the pipe frame (5), the side gas boxes (6) are installed obliquely, the filter boxes (61) are communicated and mounted on the surface of the side gas boxes (6), and the air inlet grooves (62) are arranged on the surface of the filter boxes (61).

3. A resistance welding device having low thermal shock according to claim 2, wherein: The resistance surface welding heat access preheating unit also includes a heat exhausting part, the heat exhausting part includes heat absorbing pipelines (63), the heat absorbing pipelines (63) are arranged in several groups at intervals, a gas collecting bin (51) is mounted on one side of the pipe frame (5), the several groups of heat absorbing pipelines (63) are communicated with the gas collecting bin (51), the gas collecting bin (51) is also communicated and mounted with a transmission pipeline (52) on the surface, one end of the transmission pipeline (52) penetrates the pipe frame (5), a preheating bin (53) is arranged between adjacent pipe frames (5), a circulating jet pipe (55) is communicated and mounted on one end of the transmission pipeline (52), and one end of the circulating jet pipe (55) faces the preheating bin (53).

4. The resistance welding device of claim 1, wherein: A cylinder frame (21) is mounted on one side of the welding top frame (2), the top of the cylinder frame (21) is provided with a movable cylinder (22), the output end of the movable cylinder (22) movably penetrates the cylinder frame (21), a first-stage welding device (23) is mounted on the output end of the movable cylinder (22), a first-stage welding head (24) is arranged on one side of the first-stage welding device (23), a second-stage welding device (41) is arranged on one side of the cylinder frame (21) close to the top of the welding bottom frame (4), and a second-stage welding head (42) is arranged on one side of the second-stage welding device (41).

5. A resistance welding device having low thermal shock according to claim 3, wherein: An airflow limiting unit is arranged outside the placing cavity (31).

6. A resistance welding device having low thermal shock according to claim 5, wherein: The airflow limiting unit includes a vertical baffle (54), the vertical baffle (54) is arranged on the top of the preheating bin (53), and the vertical baffle (54) is mounted between adjacent pipe frames (5).

7. A resistance welding device having low thermal shock according to claim 5, wherein: The airflow limiting unit also includes a blocking cover (7), the blocking cover (7) is mounted on the surface of the pipe frame (5) through an electric hinge, and the blocking cover (7) is symmetrically provided as two groups.

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