Handheld welding pen

Abstract

The utility model relates to the technical field of welding pens, and discloses a handheld welding pen which comprises a handle and two conducting rods moving up and down, the tops of the two conducting rods are electrically connected with an electric welding machine respectively, the bottoms of the conducting rods penetrate through the handle from top to bottom, and spot welding ends driving the conducting rods to move up and down are arranged at the bottoms of the conducting rods. The spot welding end is exposed out of the lower portion of the handle, two elastic deformation probes are arranged in the upper portion of the handle, the two probes are movably connected with the two conductive rods in an abutting mode correspondingly, the probes are connected with a controller for detecting potential changes, and the controller is electrically connected with the electric welding machine. The handheld welding pen adopts a potential detection method, that is, after a spot welding end is pressed on a weldment, conductive rods move towards a probe and abut against the probe, the spot welding end is in a short-circuit state, the potential between the two conductive rods connected with the spot welding end changes from high to low, and a controller controls an electric welding machine to output welding current to weld the weldment after detecting the potential change. The problem that the welding process of the electric welding machine is unstable is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding pens, in particular to a handheld welding pen. Background Art

[0002] Electric welding refers to a welding method that uses electrical energy to achieve atomic bonding of the weldment through heating or pressure, or both, with or without filler materials. The processing equipment used for electric welding is called an electric welder.

[0003] When the electric welder is working, both spot welding electrodes (spot welding needles) need to maintain a certain pressure and be pressed against the metal weldment to be welded. Otherwise, it is easy to cause fire when the welding current flows through the welding point, which will not only fail to complete the welding, but also damage the weldment and spot welding needle, and even cause personal injury. Utility Model Content

[0004] The utility model aims to provide a handheld welding pen, aiming to solve the problem of unstable welding process of electric welding machines in the prior art.

[0005] The utility model is implemented as follows: a handheld welding pen comprises a handle and two conductive rods which move up and down, the tops of the two conductive rods are respectively electrically connected to an electric welder, the bottoms of the conductive rods penetrate the handle from top to bottom, a spot welding end for driving the conductive rod to move up and down is arranged on the bottom of the conductive rod, the spot welding end is exposed at the lower part of the handle, two elastically deformable probes are arranged in the upper part of the handle, the two probes are respectively movably abutted against the two conductive rods, the probes are connected to a controller for detecting potential changes, and the controller is electrically connected to the electric welder.

[0006] Furthermore, a detection block is provided on the conductive rod, and the detection block is arranged opposite to the probe with a movable gap therebetween.

[0007] Furthermore, the probe is located above the detection block, and the two are arranged opposite to each other longitudinally.

[0008] Furthermore, the top of the probe is exposed outside the handle, and the bottom of the probe is embedded in the handle.

[0009] Furthermore, the handle has a limiting groove with an external opening, the bottom of the probe is exposed at the top of the limiting groove, and the detection block is located in the limiting groove.

[0010] Furthermore, the conductive rod is arranged perpendicular to the detection block.

[0011] Furthermore, the spot welding end is connected to the handle via two springs, the two springs are respectively sleeved on the outer circumference of the two conductive rods, the top of the spring abuts against the handle, and the bottom of the spring presses against the spot welding end.

[0012] Furthermore, the spot welding end includes two needle clamping blocks, which are respectively slidably mounted on the lower part of the handle, and the bottoms of the two conductive rods are correspondingly inserted into the two needle clamping blocks. Spot welding needles for electric welding are arranged in the needle clamping blocks, and the lower part of the spot welding needles is exposed below the needle clamping blocks.

[0013] Furthermore, the needle clamp block is connected to the handle via a slider, the needle clamp block is slidably mounted on the slider, the slider is fixedly clamped on the lower part of the handle via a screw and a nut plate, and the slider and the nut plate are arranged at a relative interval.

[0014] Furthermore, the two needle clamping blocks are arranged with a relative spacing therebetween.

[0015] Compared with the prior art, the handheld welding pen provided by the utility model utilizes a potential detection method, that is, after the spot welding end is crimped on the workpiece, the conductive rod moves toward and abuts the probe, the spot welding end is in a short-circuit state, and the potential between the two conductive rods connected thereto will change from high to low. After the controller detects the potential change, it controls the electric welder to output welding current to weld the workpiece, thereby solving the problem of unstable welding process of the electric welder. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front perspective schematic diagram of a handheld welding pen provided by the utility model;

[0017] Figure 2 It is an exploded three-dimensional schematic diagram of the handheld welding pen provided by the utility model;

[0018] Figure 3 It is a rear perspective schematic diagram of a handheld welding pen provided by the utility model;

[0019] Figure 4 The utility model is a rear view cutaway stereoscopic schematic diagram of a handheld welding pen provided by the utility model.

[0020] In the figure: a handle 10 , a conductive rod 20 , a probe 30 , a spot welding end 40 , a spring 50 , a limiting groove 11 , a detection block 21 , a needle clamp block 41 , a spot welding needle 42 , a slider 43 , and a nut plate 44 . DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0022] The implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0023] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present utility model, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present utility model. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0024] Reference Figure 1-4 As shown, it is a preferred embodiment provided by the utility model.

[0025] The handheld welding pen comprises a handle 10 and two conductive rods 20 that move up and down, the tops of the two conductive rods 20 are electrically connected to the electric welding machine respectively, the bottoms of the conductive rods 20 penetrate the handle 10 from top to bottom, a spot welding end 40 for driving the conductive rods 20 to move up and down is arranged on the bottom of the conductive rod 20, the spot welding end 40 is exposed at the lower part of the handle 10, two elastically deformable probes 30 are arranged in the upper part of the handle 10, the two probes 30 are movably abutted against the two conductive rods 20 respectively, the probes 30 are connected to a controller for detecting potential changes, and the controller is electrically connected to the electric welding machine.

[0026] The handheld welding pen provided above uses a potential detection method, that is, after the spot welding end 40 is crimped on the weldment, the conductive rod 20 moves toward and abuts the probe 30, and the spot welding end 40 is in a short-circuit state. The potential between the two conductive rods 20 connected thereto will change from high to low. After the controller detects the potential change, it controls the electric welder to output the welding current to weld the weldment, thereby solving the problem of unstable welding process of the electric welder.

[0027] In this embodiment, a detection block 21 is provided on the conductive rod 20, and the detection block 21 is arranged opposite to the probe 30, and there is a movable gap between the two. In this way, the conductive rod 20 can be movably abutted against the probe 30 through the detection block 21, so that the potential between the two conductive rods 20 will change from high to low, and the controller can detect the potential change and control the welding machine to output the welding current.

[0028] In this embodiment, the probe 30 is located above the detection block 21, and the two are arranged longitudinally opposite to each other, so that the detection block 21 can move and abut against the probe 30.

[0029] In this embodiment, the top of the probe 30 is exposed outside the handle 10, and the bottom of the probe 30 is inserted into the handle 10. In this way, it is convenient to fix the probe 30 and to electrically connect the probe 30 to the controller through a wire.

[0030] In this embodiment, the handle 10 has a limiting groove 11 with an external opening, the bottom of the probe 30 is exposed at the top of the limiting groove 11, and the detection block 21 is located in the limiting groove 11. In this way, the handle 10 can limit the moving range of the detection block 21 through the limiting groove 11, and the state between the detection block 21 and the probe 30 can also be observed through the limiting groove 11.

[0031] In this embodiment, the conductive rod 20 is arranged vertically to the detection block 21. In this way, the moving range of the conductive rod 20 can be limited by the detection block 21.

[0032] In this embodiment, the spot welding end 40 is connected to the handle 10 via two springs 50, which are respectively sleeved on the outer circumferences of the two conductive rods 20, with the top of the spring 50 abutting against the handle 10, and the bottom of the spring 50 abutting against the spot welding end 40. In this way, the spot welding end 40 can drive the conductive rod 20 to reset through the spring 50, so as to realize the separation state of the detection block 21 and the probe 30.

[0033] In this embodiment, the spot welding end 40 includes two needle clamping blocks 41, and the two needle clamping blocks 41 are respectively slidably installed on the lower part of the handle 10, and the bottoms of the two conductive rods 20 are correspondingly inserted into the two needle clamping blocks 41. The needle clamping blocks 41 are provided with spot welding needles 42 for electric welding, and the lower part of the spot welding needles 42 is exposed below the needle clamping blocks 41; the two needle clamping blocks 41 are arranged relatively spaced apart.

[0034] The handheld welding pen of this patent uses a potential detection method, that is, after the two spot welding needles 42 are crimped onto the workpiece, the two needle clamp blocks 41 drive the two conductive rods 20 to drive the detection block 21 to move toward the probe 30 and abut against it, so that the two spot welding needles 42 are in a short-circuit state, and the potential between the two conductive rods 20 connected thereto will change from high to low. After the controller detects the potential change, it controls the electric welder to output the welding current to achieve welding of the workpiece.

[0035] In this embodiment, the needle clamp block 41 is connected to the handle 10 via a slider 43, and the needle clamp block 41 is slidably mounted on the slider 43. The slider 43 is fixedly clamped on the lower part of the handle 10 by screws and a nut plate 44, and the slider 43 and the nut plate 44 are arranged relatively spaced apart. The slider 43 can be used to allow the needle clamp block 41 to slide in a directional manner, and the slider 43 can be mounted on the handle 10 by screws and the nut plate 44.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Handheld welding pen, characterized in that, It includes a handle and two conductive rods that move up and down, the tops of the two conductive rods are electrically connected to the electric welder respectively, the bottoms of the conductive rods penetrate the handle from top to bottom, the bottoms of the conductive rods are provided with spot welding ends for driving the conductive rods to move up and down, the spot welding ends are exposed at the lower part of the handle, and the upper part of the handle is provided with two elastically deformable probes, the two probes are movably abutted against the two conductive rods respectively, the probes are connected to a controller for detecting potential changes, and the controller is electrically connected to the electric welder.

2. The handheld welding pen according to claim 1, characterized in that: The conductive rod is provided with a detection block, and the detection block is arranged opposite to the probe with a movable gap therebetween.

3. The handheld welding pen according to claim 2, characterized in that: The probe is located above the detection block, and the two are arranged opposite to each other in the longitudinal direction.

4. The handheld welding pen according to claim 3, characterized in that: The top of the probe is exposed outside the handle, and the bottom of the probe is inserted into the handle.

5. The handheld welding pen according to claim 4, characterized in that: The handle is provided with a limiting groove with an external opening, the bottom of the probe is exposed at the top of the limiting groove, and the detection block is located in the limiting groove.

6. The handheld welding pen according to any one of claims 2 to 5, characterized in that: The conductive rod is arranged perpendicular to the detection block.

7. The handheld welding pen according to any one of claims 1 to 5, characterized in that: The spot welding end is connected to the handle via two springs, which are respectively sleeved on the outer circumferences of the two conductive rods, with the top of the spring abutting against the handle and the bottom of the spring pressing against the spot welding end.

8. The handheld welding pen according to claim 7, characterized in that: The spot welding end includes two needle clamping blocks, which are respectively slidably mounted on the lower part of the handle, and the bottoms of the two conductive rods are correspondingly inserted into the two needle clamping blocks. Spot welding needles for electric welding are arranged in the needle clamping blocks, and the lower part of the spot welding needles is exposed below the needle clamping blocks.

9. The handheld welding pen according to claim 8, characterized in that: The needle clamp block is connected to the handle via a slider, the needle clamp block is slidably mounted on the slider, the slider is fixedly clamped on the lower part of the handle via a screw and a nut plate, and the slider and the nut plate are arranged relatively spaced apart.

10. The handheld welding pen according to claim 8, characterized in that: The two needle clamp blocks are arranged relatively spaced apart from each other.

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