Feeding device for spark plug side electrode ignition contact welding

Abstract

The utility model discloses a feeding device for spark plug side electrode ignition contact welding, which comprises a base, a welding base, a flexible pressing mechanism and a lifting receding mechanism, a welding copper ring lifting in the welding base is arranged in the welding base, and a supporting hole for supporting platinum is arranged in the welding copper ring. The lower die moves leftwards to convey the cut platinum to a welding position, the flexible pressing mechanism presses downwards to press the platinum wire in the lower die into the supporting hole, then the lifting avoiding mechanism drives the welding copper ring to descend, and meanwhile, the flexible pressing mechanism always applies downward pressure to the platinum wire to ensure that the platinum wire is always located in the supporting hole; the lower die can be completely separated. And then the flexible pressing mechanism ascends, and the lower die moves rightwards to reset. The spark plug side electrode is manually placed on the platinum wire, and the welding mechanism carries out welding. After welding is completed, the actions are repeated, automatic platinum feeding can be achieved, labor intensity is reduced, efficiency is improved, and welding quality is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a spark plug processing technical field, concretely speaking, a kind of feeding device for spark plug side electrode ignition contact point welding. BACKGROUND

[0002] Spark plug, alias fire nozzle, is the element that high-voltage electricity is used in cylinder to produce electric spark in gasoline engine. Spark plug is composed of shell, insulator, center electrode and side electrode.

[0003] After spark plug is welded side electrode, platinum wire needs to be welded to side electrode as ignition contact point, and the material of ignition contact point is usually selected from platinum, nickel alloy, iridium gold and other precious metals to improve the performance of spark plug. The following reasons exist for welding platinum: 1. improve durability: platinum has high melting point (about 1772 DEG C) and excellent corrosion resistance, can withstand high temperature and high pressure of combustion chamber and gas corrosion, prolongs the service life of spark plug, reduces replacement frequency. Ordinary spark plug needs to be replaced every 20-30 thousand kilometers, while platinum spark plug can reach 60-100 thousand kilometers. 2. enhance ignition performance: platinum can reduce the voltage required for spark plug to jump, make ignition more rapid and accurate, improve engine ignition performance, make combustion more sufficient. Especially when engine cold start or high load operation, it can ensure reliable ignition and improve engine working stability. 3. improve conductivity: platinum is a good conductor, can reduce current transmission resistance, make the current pass quickly in ignition moment, produce strong electric spark, meet the high requirements of engine on ignition system, and improve power output.

[0004] But the length of platinum wire required for ignition contact is relatively short, usually less than 1 μm, and the operator needs to use tweezers to put platinum material on the welding point of spark plug side electrode, and needs to use eyes to distinguish whether platinum material is vertically erected on the welding point, which requires very high eyesight, and eyes are easy to fatigue, and it is very inconvenient to hold such small platinum material with tweezers, so the efficiency of manual welding of platinum material is very low. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the above problems, provides a kind of feeding device for spark plug side electrode ignition contact point welding, can realize the automatic feeding of platinum, reduces labour intensity, improves efficiency, and guarantees welding quality.

[0006] The technical scheme adopted by the utility model to solve its technical problems is:

[0007] The utility model relates to a kind of spark plug side electrode ignition contact point welding feeding device, including base, the welding base for cutting lower die to transport platinum material is set on the base, the flexible material pressing mechanism for being pressed into welding position by platinum material transported to position is set on the base, the lifting avoidance mechanism for cutting lower die to evacuate welding position, the welding copper ring that is lifted in welding base is equipped in the welding base, the support hole for supporting platinum is equipped in the welding copper ring.

[0008] Further, the welding base is provided with a groove, and the welding copper ring is installed in the lifting groove.

[0009] Further, the front side of the lifting groove is further provided with a proximity switch for sensing whether the spark plug exists.

[0010] Further, the lifting groove is provided with a terminal connected with the bottom of the welding copper ring.

[0011] Further, the lifting groove is provided with a positioning block for positioning the side surface of the side electrode and a positioning mechanism for positioning the end of the side electrode.

[0012] Further, the positioning mechanism includes a mounting frame arranged at the upper end of the lifting groove, a sliding rod arranged on the mounting frame and sliding on the mounting frame, and a positioning head arranged at the right end of the sliding rod.

[0013] Further, the lifting avoidance mechanism includes a gas cylinder connected with the lifting groove through a piston rod.

[0014] Further, the flexible material pressing mechanism includes a moving frame arranged on the base and moving forward and backward on the base, a lifting frame arranged on the moving frame and lifting on the moving frame, and a pressing mechanism arranged on the lifting frame.

[0015] Further, the pressing mechanism includes a sleeve arranged on the lifting frame, a lifting rod arranged at the lower end of the sleeve and sliding in the sleeve, and a punch arranged at the lower end of the lifting rod.

[0016] The utility model has the advantages that:

[0017] 1. The utility model provides a welding device for platinum wire, which comprises a base, a welding base provided on the base for conveying platinum material to a cutting lower die, a flexible pressing mechanism provided on the base for pressing the platinum material conveyed to the welding position, and a lifting avoidance mechanism for removing the cutting lower die from the welding position, wherein the welding base is provided with a welding copper ring that can be lifted in the welding base, and the welding copper ring is provided with a supporting hole for supporting the platinum material. The platinum wire cut by the cutting lower die is conveyed to the welding position by moving the cutting lower die to the left, and then the flexible pressing mechanism presses the platinum wire in the cutting lower die into the supporting hole. Then, the lifting avoidance mechanism drives the welding copper ring to descend, and at the same time, the flexible pressing mechanism always applies a downward pressure to the platinum wire to ensure that the platinum wire is always in the supporting hole and can completely separate from the cutting lower die. Then, the flexible pressing mechanism rises, and the cutting lower die moves to the right to reset. The side electrode of the spark plug is placed on the platinum wire by manual operation, and the welding mechanism is used for welding. After the welding is completed, the above-mentioned operation is repeated to realize automatic feeding of the platinum wire, reduce labor intensity, improve efficiency, and ensure the welding quality. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows, and obviously, other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the welding base of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the flexible pressing mechanism of the utility model;

[0022] Figure 4 It is a front view of the pressing mechanism of the utility model;

[0023] Figure 5 It is Figure 4 the sectional view of A-A in the middle;

[0024] Figure 6 It is a working state schematic diagram of the flexible pressing mechanism;

[0025] Figure 7 It is Figure 6 the local enlarged view of B in the middle;

[0026] Figure 8 It is a structural schematic diagram of the lifting avoidance mechanism of the utility model;

[0027] Figure 9 It is a structural schematic diagram of the welding state of the utility model;

[0028] Figure 10 is a welding state front view of the utility model;

[0029] Figure 11 is Figure 10 is a sectional view at C-C;

[0030] Figure 12 is Figure 11 is an enlarged view of D;

[0031] In the figure: base 1, welding base 2, upper die 3, lower die 4, welding copper ring 5, support hole 6, groove 7, lifting groove 8, proximity switch 9, wiring terminal 10, positioning block 11, mounting frame 12, sliding rod 13, positioning head 14, first compression spring 15, air cylinder 16, moving frame 17, lifting frame 18, sleeve 19, lifting rod 20, punch pin 21, second compression spring 22. DETAILED DESCRIPTION

[0032] In order to make the person skilled in the art better understand the technical scheme in the utility model, the technical scheme in the utility model embodiment will be described clearly and completely below in combination with the drawings in the utility model embodiment. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the utility model.

[0033] As Figure 1 , Figure 6 and Figure 7 shown, a kind of spark plug side electrode ignition contact point welding is loaded with device, including base 1, the welding base 2 for cutting lower die to transport platinum material is set on the base 1, flexible pressing mechanism for being set on the base 1 and being used to press into welding position the platinum material transported to position, lifting avoidance mechanism for cutting lower die to withdraw from welding position, the welding base 2 is equipped with in welding base 2 lifting welding copper ring 5, the welding copper ring 5 is equipped with support hole 6 for supporting platinum in it. Upper die 3 is also installed on welding base 2, and upper die 3 is located at the right end of welding base 2, and lower die 4 is set on base and moves left and right on base, and air cylinder for driving lower die 4 to move left and right is provided on base, and sliding slot is provided on welding base 2, and left end is deeply in sliding slot and slides in sliding slot when lower die 4 moves left and right.

[0034] In the initial state, the cut platinum wire is located in the through hole of the lower mold 4, which is a cutting hole, and the platinum wire is in contact with the bottom of the sliding groove and does not fall out of the cutting hole. The left movement of the lower mold 4 delivers the cut platinum wire to the welding position, which is above the welding copper ring 5, and at this time the platinum wire is above the support hole 6. Then the flexible pressing mechanism is pressed down, and the platinum wire in the lower mold 4 is pressed into the support hole 6, and at this time a small part of the upper end of the platinum wire is still in the through hole of the lower mold 4. Then the lifting avoidance mechanism drives the welding copper ring 5 to descend, and at the same time, the flexible pressing mechanism always gives the platinum wire a downward pressure to ensure that the platinum wire is always in the support hole 6 and can completely separate from the lower mold. Then the flexible pressing mechanism rises, and the lower mold 4 moves right to reset. As shown in Figures 9 to 12 , the spark plug side electrode is placed on the platinum wire by hand, and the welding mechanism is welded. After welding, the above-mentioned action is repeated to realize automatic feeding of platinum, reduce labor intensity, improve efficiency, and ensure welding quality.

[0035] As shown in Figure 2 , a positioning bolt for positioning the left limit position of the lower mold 4 is arranged at the left end of the sliding groove on the welding base 2. When the lower mold 4 moves left until it contacts the positioning bolt, the lower mold 4 does not move, which ensures that the platinum wire is above the support hole 6, and the flexible pressing mechanism can press the platinum wire into the support hole 6.

[0036] As shown in Figure 2 , Figure 6 and Figure 9 , the welding base 2 is provided with a groove 7, the groove 7 is provided with a lifting groove 8, and the welding copper ring 5 is installed in the lifting groove 8. The height of the lifting groove 8 and the welding copper ring 5 is slightly lower than the height of the bottom of the sliding groove in the welding base 2, and the height difference is not greater than 0.1mm. When the lower mold 4 moves left until the platinum wire moves above the lifting groove 8 and the welding copper ring 5, it will not be stuck, and the length of the lower end of the platinum wire extending out of the lower mold 4 is less than 0.1mm, which will not damage the platinum wire.

[0037] As shown in Figure 9 , the front side of the lifting groove 8 is also provided with a proximity switch 9 for sensing whether the spark plug exists. When the proximity switch 9 senses that there is a spark plug, the lower mold 3 cannot move left and cannot perform the cutting action.

[0038] As shown in Figure 11 , the lifting groove 8 is provided with a terminal 10 in contact with the bottom of the welding copper ring 5, and the terminal 10 is connected with the welding machine through a wire. When the spark plug is placed in position and the side electrode is in contact with the platinum wire, and then the welding gun of the welding machine contacts the side electrode, a closed loop is formed to complete the welding operation.

[0039] As shown in Figure 9 and Figure 10As shown, the lifting groove 8 is provided with a positioning block 11 for positioning the side surface of the side electrode and a positioning mechanism for positioning the end of the side electrode, and the positioning block 11 is fixed on the upper end of the lifting groove 8 by screws. After the flexible pressing mechanism and the lifting positioning mechanism are reset, the person manually holds the spark plug, so that the side surface of the side electrode contacts the right end of the positioning block 11 and the end of the side electrode contacts the positioning mechanism, thereby realizing accurate positioning of the side electrode.

[0040] As shown in Figure 9 and Figure 10 The positioning mechanism includes a mounting frame 12 arranged on the upper end of the lifting groove 8, a sliding rod 13 arranged on the mounting frame 12 and sliding on the mounting frame 12, and a positioning head 14 arranged on the right end of the sliding rod 13. The mounting frame 12 is provided with a through hole, the left end of the sliding rod 13 passes through the through hole and slides in the through hole, the left end of the sliding rod 13 is provided with an end plate to prevent the sliding rod 13 from falling out of the through hole, the sliding rod 13 is provided with a first compression spring 15, the left end of the first compression spring 15 contacts the mounting frame 12, and the right end of the first compression spring 15 contacts the positioning head 14. When the lower die 4 moves to the left, it first contacts the positioning head 14, the first compression spring 15 is compressed under force and does not interfere with the movement of the lower die 4. After the lower die 4 moves to the right and resets, the positioning head 14 moves to the right under the action of the first compression spring 15, the right end of the positioning head 14 extends out of the positioning block 11, and the positioning block 11 cooperates with the positioning head 14 to form a right-angle positioning groove, thereby positioning the side electrode.

[0041] As shown in Figure 8 The lifting positioning mechanism includes a gas cylinder 16 connected with the piston rod of the lifting groove 8, the lower end of the base 1 is provided with a connecting disc, the lower end of the lifting groove 8 is provided with a sliding rod connected with the piston rod of the gas cylinder 16, and the connecting disc is provided with a guide sleeve for guiding the sliding of the sliding rod.

[0042] The initial position of the lifting positioning mechanism is that the upper surface of the lifting groove 8 is in the same plane as the upper surface of the welding copper ring 5 and is 0.1 mm lower than the lower surface of the sliding groove of the welding base 2, so as not to interfere with the left and right movement of the lower die and not to leak the platinum material stored in the lower die.

[0043] Then the lifting mechanism moves downward under the action of the first gas cylinder 16, at this time the platinum wire is still pressed in the support hole 6 by the flexible pressing mechanism, but the whole platinum wire has completely separated from the lower die. Then the flexible pressing mechanism moves upward and resets backward, and the whole flexible pressing device moves backward to the original position. For example, the depth of the support hole 6 is 0.6 mm, and the length of the platinum wire is 0.9 mm. When initially pressed downward, the platinum wire will have 0.2 mm in the lower die, and then the lifting groove 8 needs to be lowered by more than 0.2 mm, which can be adjusted according to actual needs, and will not be described in detail here.

[0044] After the lower mold moves to the right under the action of the cylinder, it hits the right limit stop and returns to the platinum wire cutting position. Because the platinum material moves downward by a certain distance, there is a gap between the upper end of the platinum wire and the lower mold, so the lower mold will not hit the platinum wire during the retraction operation. At this time, the platinum wire is left in the support hole 6, ready for welding.

[0045] By setting the lifting and avoiding mechanism, when initially pressed down, the welding copper ring 5 is at a high position, and the gap between the upper surface of the welding copper ring 5 and the lower surface of the lower mold is minimized, less than 0.1mm, which ensures that when the flexible pressing mechanism presses down the platinum wire, the center line of the platinum wire will not produce a large deflection, and the platinum wire can enter the support hole 6 of the welding copper ring 5 without being squeezed and damaged.

[0046] As shown in Figure 3 , the flexible pressing mechanism includes a moving frame 17 arranged on the base 1 and moving forward and backward on the base 1, a lifting frame 18 arranged on the moving frame 17 and lifting up and down on the moving frame, and a pressing mechanism arranged on the lifting frame 18. The lower end of the moving frame 17 is connected to the base 1 through a guide rail and a sliding block, and the base 1 is provided with a cylinder for driving the moving frame 17 to move forward and backward. The lifting frame 18 is connected to the moving frame 17 through a guide rail and a sliding block, and the upper end of the moving frame 17 is provided with a cylinder for driving the lifting frame 18 to lift up and down.

[0047] As shown in Figure 4 and Figure 5 , the pressing mechanism includes a sleeve 19 arranged on the lifting frame 18, a lifting rod 20 arranged at the lower end of the sleeve 19 and having its upper end extending into the sleeve 19 and sliding in the sleeve 19, and a punch 21 arranged at the lower end of the lifting rod 20. The sleeve 19 is provided with a second compression spring 22, the lower end of the second compression spring 22 is in contact with the upper end of the lifting rod 20, and the upper end of the second compression spring 22 is in contact with the upper end of the sleeve 19.

[0048] After the lower mold moves the platinum wire to the position, the moving frame 17 moves forward and stops when it hits the limit screw. Then the lifting frame 18 is pushed down, the punch 21 is inserted into the through hole of the lower mold, and the platinum wire in the through hole is punched into the support hole. The sleeve 19 is provided with a second compression spring 22, and the punch presses the platinum wire downward into the support hole of the welding copper ring with a flexible force. The second compression spring 22 in the flexible pressing device is compressed by more than 5mm, which ensures that the punch always presses the platinum wire with a flexible force when the welding copper ring is lowered.

[0049] The lifting frame 18 is respectively provided with a guide pin matched with the upper through hole of the lifting groove and the upper through hole of the lower mold to realize accurate positioning of the punch and the welding position.

[0050] In the description of the utility model, it is to explain that, the orientation or position relation indicated by the terms "left", "right", "up", "down" and the like is the orientation or position relation shown based on the drawing, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore can not be understood as a limitation on the utility model.

[0051] In the description of the utility model, it is to explain that, the orientation or position relation indicated by the terms "left", "right", "up", "down" and the like is the orientation or position relation shown based on the drawing, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore can not be understood as a limitation on the utility model.

Claims

1. A material feeding device for welding a side electrode spark plug tip, characterized by, The utility model relates to a platinum cutting and welding device, including base (1), set up on the base (1) for cutting lower die delivery platinum material's welding base (2), set up on the base (1) for the flexible pressure material mechanism that will be delivered to the platinum material of position press into welding position, lift avoidance mechanism for cutting lower die evacuation welding position, the welding copper ring (5) that is set up in the welding base (2) is lifted in the welding base (2), the support hole (6) for supporting platinum is set up in the welding copper ring (5).

2. A spark plug side electrode tip firing end welding feed apparatus as set forth in claim 1 wherein, The welding base (2) is provided with a groove (7), and the welding copper ring (5) is installed in the lifting groove (8).

3. A spark plug side electrode tip firing end welding feed apparatus as set forth in claim 2 wherein, The lifting groove (8) is further provided with a proximity switch (9) for sensing whether the spark plug exists.

4. A spark plug side electrode tip firing end welding feed apparatus as set forth in claim 2 wherein, The lifting groove (8) is provided with a terminal (10) in contact with the bottom of the welding copper ring (5).

5. A spark plug side electrode tip firing end welding feed apparatus as set forth in claim 2 wherein, The lifting groove (8) is provided with a positioning block (11) for positioning the side surface of the side electrode and a positioning mechanism for positioning the end of the side electrode.

6. An upper for a side electrode spark plug firing tip welding apparatus as described in claim 5 wherein, The positioning mechanism comprises a mounting frame (12) arranged at the upper end of the lifting groove (8), a sliding rod (13) arranged on the mounting frame (12) and sliding on the mounting frame (12), and a positioning head (14) arranged at the right end of the sliding rod (13). A first compression spring (15) is arranged on the sliding rod (13), the left end of the first compression spring (15) is in contact with the mounting frame (12), and the right end of the first compression spring (15) is in contact with the positioning head (14).

7. A spark plug side electrode tip firing end welding feed apparatus as described in claim 1 wherein, The lift avoidance mechanism comprises a gas cylinder (16) connected to the lifting groove (8) through a piston rod.

8. A spark plug side electrode tip firing end welding feed apparatus as set forth in claim 1 wherein, The flexible pressure material mechanism comprises a moving frame (17) arranged on the base (1) and moving forward and backward on the base (1), a lifting frame (18) arranged on the moving frame (17) and lifting on the moving frame, and a downward pressing mechanism arranged on the lifting frame (18).

9. An upper material placement device for welding a side electrode spark plug firing tip as defined in claim 8 wherein, The downward pressing mechanism comprises a sleeve (19) arranged on the lifting frame (18), a lifting rod (20) arranged at the lower end of the sleeve (19) and extending into the sleeve (19) and sliding in the sleeve (19), and a punch pin (21) arranged at the lower end of the lifting rod (20). The sleeve (19) is provided with a second compression spring (22), the lower end of the second compression spring (22) is in contact with the upper end of the lifting rod (20), and the upper end of the second compression spring (22) is in contact with the upper end of the sleeve (19).

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