A spark plug side electrode welding platinum equipment

Abstract

The present invention discloses a spark plug side electrode welding platinum equipment, comprising a base, a cutting mechanism arranged on the base for cutting the platinum wire, a welding mechanism for welding the platinum wire, and a transfer mechanism for transferring the cut platinum wire to the welding mechanism. During operation, the platinum wire of the required length is cut by the cutting mechanism, and the platinum wire is transported to the welding position by the transfer mechanism. Then the welding mechanism performs welding. Automatic cutting, transfer and welding feeding of the platinum wire are realized, efficiency is improved, and welding quality is high. The operator does not need to use tweezers to clamp the platinum wire and put it on the welding point of the spark plug side electrode, and does not need to use human eyes to distinguish whether the platinum wire stands vertically at the welding point, which reduces labor intensity.

Description

Technical Field

[0001] The invention relates to the field of spark plug processing, in particular to a spark plug side electrode welding platinum equipment. Background Art

[0002] Spark plugs are divided into many categories. In terms of materials, they mainly include nickel alloy, platinum, iridium, etc. These materials have good conductivity. The biggest feature of platinum spark plugs is long life, good durability, and suitable for more severe working conditions. Since the center electrode of platinum spark plugs is thinner, according to the principle of tip discharge, the electrode tip is more likely to accumulate more electrical energy, and the electric spark is more likely to jump over the gap between the two electrodes.

[0003] The spark plug consists of two parts: an insulator and a metal shell. The metal shell has threads and is screwed onto the engine cylinder. There is a center electrode in the metal shell, which is insulated from the metal shell by insulating material. The metal shell is also welded with side electrodes. There is a small gap between the center electrode and the side electrode. Pulse high voltage electricity breaks through the air between the two electrodes, generating electric sparks to ignite the combustible mixture to do work. Since the spark plug works in a harsh environment of high temperature and high pressure, very high requirements are placed on its materials and manufacturing process.

[0004] At present, the domestic spark plug welding platinum process is still in the manual welding stage, and there is no corresponding automated welding technology and equipment. Since the platinum wire required for welding is very small, taking a platinum wire with a diameter of 0.6mm as an example, the cut platinum wire for welding is a small cylinder with a diameter of 0.6mm and a height of about 0.9mm. The operator needs to use tweezers to clamp the platinum wire and put it on the welding point of the spark plug side electrode, and needs to use the human eye to distinguish whether the platinum wire stands vertically at the welding point. The eyesight requirements are very high, and the human eye is easily fatigued. It is also very inconvenient to hold such a small platinum wire with tweezers by hand. Therefore, the efficiency of manual welding of platinum wire is very low. In addition, the quality of manual welding cannot be guaranteed, which has a lot to do with the operator's skills. It is impossible to ensure the consistency of welding quality in mass production. When manually welding platinum, the human eye will see the wrong welding point, causing the welding point to deviate from the center position; the diameter and height of the platinum wire are not correctly distinguished, resulting in the platinum wire lying down and being welded. Summary of the invention

[0005] The object of the present invention is to solve the above-mentioned problem and provide a spark plug side electrode welding platinum equipment, which can realize automatic welding of spark plug side electrode platinum wire, improve efficiency and high welding quality.

[0006] The technical solution adopted by the present invention to solve the technical problem is:

[0007] A spark plug side electrode welding platinum device, comprising a base, a cutting mechanism arranged on the base for cutting off the platinum wire, a transport mechanism for transporting the cut platinum wire to a welding position, and a welding mechanism for welding the platinum wire on the side electrode;

[0008] Furthermore, the transfer mechanism includes a welding base arranged on the base for the cutting lower die to transport the platinum wire, a flexible pressing mechanism arranged on the base for pressing the transported platinum wire into the welding position, and a lifting and avoiding mechanism for the cutting lower die to evacuate the welding position. A groove is provided in the welding base, a lifting groove is provided in the groove, a welding copper ring is provided in the lifting groove, and a supporting hole for supporting platinum is provided in the welding copper ring.

[0009] Furthermore, the cutting mechanism includes a feeding mechanism arranged on the base for realizing the spaced and fixed-distance conveying of the platinum wire, an upper mold arranged on the base, and a lower mold arranged on the base and movable left and right for cooperating with the upper mold to cut the platinum wire, and both the upper mold and the lower mold are provided with through holes cooperating with the platinum wire.

[0010] Furthermore, the unloading mechanism includes a fixing frame arranged on the base, an upper clamping mechanism arranged on the fixing frame, and a lower clamping mechanism arranged on the fixing frame and raised and lowered on the fixing frame, and a first groove is provided on the fixing frame.

[0011] Further, the upper clamping mechanism comprises an upper fixing block fixed in the first groove, an upper clamping block disposed in the first groove and moving in the first groove;

[0012] The lower clamping mechanism comprises a first lifting frame arranged in the first groove and lifted in the first groove, a second groove is arranged at the front end of the first lifting frame, a lower fixing block fixed in the second groove and a lower clamping block moving in the second groove are arranged in the second groove;

[0013] A limit block for limiting the downward movement limit position of the first lifting frame is provided at the lower end of the fixing frame.

[0014] Furthermore, the welding mechanism includes a first moving frame which is arranged on the base and moves on the base, and a welding head which is arranged on the first moving frame and rises and falls on the first moving frame.

[0015] Furthermore, the first movable frame is provided with a welding head clamping block which is lifted and lowered on the first movable frame, the welding head clamping block and the first movable frame are connected via a guide rail slider, a second lifting cylinder is provided at the upper end of the first movable frame, a slot is provided at the upper end of the slider of the welding head clamping block, a lifting rod which cooperates with the slot is provided at the piston rod end of the second lifting cylinder, a baffle is provided on the lifting rod, a positioning rod is provided on the welding head clamping block, a first compression spring is provided between the lifting rod and the positioning rod, the upper end of the first compression spring is sleeved on the lifting rod and contacts with the baffle, and the lower end of the first compression spring is sleeved on the positioning rod and contacts with the welding head clamping block.

[0016] Furthermore, a proximity switch for sensing the presence of a spark plug is provided at the front side of the lifting slot;

[0017] The lifting slot is provided with a wiring terminal in contact with the bottom of the welding copper ring;

[0018] The lifting groove is provided with a second positioning block for the side of the positioning side electrode and a positioning mechanism for the end of the positioning side electrode, 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, and a second compression spring is provided on the sliding rod, the left end of the second compression spring is in contact with the mounting frame, and the right end of the second compression spring is in contact with the positioning head.

[0019] Furthermore, the lifting avoidance mechanism comprises a third lifting cylinder whose piston rod end is connected to the lifting groove.

[0020] Furthermore, the flexible material pressing mechanism includes a second movable frame arranged on the base and moving forward and backward on the base, a second lifting frame arranged on the second movable frame and lifting and lowering on the movable frame, and a pressing mechanism arranged on the second lifting frame.

[0021] Furthermore, the pressing mechanism includes a sleeve arranged on the second lifting frame, a lifting rod arranged at the lower end of the sleeve and the upper end of which is inserted into the sleeve and slides in the sleeve, and a punching needle arranged at the lower end of the lifting rod. A third compression spring is arranged in the sleeve, and the lower end of the third compression spring is in contact with the upper end of the lifting rod, and the upper end of the third compression spring is in contact with the upper end of the sleeve.

[0022] The beneficial effects of the present invention are:

[0023] 1. The present invention includes a base, a cutting mechanism for cutting the platinum wire arranged on the base, a welding mechanism for welding the platinum wire on the side electrode, and a transport mechanism for transporting the cut platinum wire to the welding mechanism. During operation, the platinum wire of the required length is cut by the cutting mechanism, and the platinum wire is transported to the welding position by the transport mechanism. Then the welding mechanism performs welding. Automatic cutting, transporting and welding feeding of the platinum wire are realized, efficiency is improved, and welding quality is high. The operator does not need to use tweezers to clamp the platinum wire and put it on the welding point of the spark plug side electrode, and does not need to use human eyes to distinguish whether the platinum wire stands vertically at the welding point, which reduces labor intensity.

[0024] 2. The transfer mechanism of the present invention includes a welding base arranged on the base for the cut lower die to transport the platinum wire, a flexible pressing mechanism arranged on the base for pressing the transported platinum wire into the welding position, and a lifting and avoiding mechanism for the cut lower die to evacuate the welding position. The welding base is provided with a welding copper ring that is lifted and lowered in the welding base, and the welding copper ring is provided with a supporting hole for supporting platinum. The lower die moves left to transport the cut platinum to the welding position, and the flexible pressing mechanism is pressed down to press the platinum wire in the lower die into the supporting hole. Then the lifting and avoiding mechanism drives the welding copper ring to descend, and at the same time, the flexible pressing mechanism always gives a downward pressure to the platinum wire to ensure that the platinum wire is always in the supporting hole and can be completely separated from the lower die. Then the flexible pressing mechanism rises, and the lower die moves right to reset. The spark plug side electrode is manually placed on the platinum wire, and the welding mechanism performs welding. After welding is completed, the above actions are repeated to realize automatic loading of platinum, reduce labor intensity, improve efficiency, and ensure welding quality.

[0025] 3. The cutting mechanism of the present invention includes a feeding mechanism arranged on the base for realizing the interval and fixed distance conveyance of platinum wire, an upper mold arranged on the base, and a lower mold arranged on the base for cooperating with the upper mold to cut the platinum wire and moving left and right. Both the upper mold and the lower mold are provided with through holes cooperating with the platinum wire. During operation, the fixed distance downward movement of the platinum wire is realized by the feeding mechanism, the through holes of the upper mold and the lower mold are aligned, and the lower end of the platinum wire passes through the through holes on the upper mold and the lower mold. Then the lower mold moves to the left to cut the platinum wire. The platinum wire is stored in the through hole on the lower mold, and the feeding of the platinum wire is realized. The structure is simple, the cost is low, and the fixed distance cutting of the platinum wire can be realized with high precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 It is a schematic diagram of the structure of the present invention;

[0028] Figure 2 The cutting mechanism structure of the present invention is shown in FIG. Figure 1 ;

[0029] Figure 3 The cutting mechanism structure of the present invention is shown in FIG. Figure 2 ;

[0030] Figure 4 This is a schematic diagram of the internal structure of the cutting mechanism of the present invention;

[0031] Figure 5 This is a schematic diagram of the lower mold structure of the present invention;

[0032] Figure 6 for Figure 5 A partial enlarged view of the middle part;

[0033] Figure 7 Schematic diagram of the welding mechanism structure of the present invention

[0034] Figure 8 This is a front view of the welding mechanism of the present invention;

[0035] Fig. 9 It is a schematic diagram of the structure of the transport mechanism of the present invention;

[0036] Fig.10 This is a schematic diagram of the welding base structure of the present invention;

[0037] Fig.11 It is a structural schematic diagram of the flexible material pressing mechanism of the present invention;

[0038] Fig.12 This is a front view of the pressing mechanism of the present invention;

[0039] Fig.13 for Fig.12 Sectional view at the middle BB;

[0040] Fig.14 It is a schematic diagram of the working state of the flexible pressing mechanism;

[0041] Fig.15 for Fig.14 A partial enlarged view of point C in the middle;

[0042] Fig.16 This is a schematic diagram of the structure of the lifting and avoiding mechanism of the present invention;

[0043] Fig.17 It is a schematic diagram of the welding state structure of the present invention;

[0044] Fig.18 This is a front view of the welding state of the present invention;

[0045] Fig.19 for Fig.18 Sectional view at DD in the middle;

[0046] Fig. 20 for Fig.19 A partial enlarged view of point E in the middle.

[0047] In the figure: base 1, upper die 2, lower die 3, through hole 4, fixed frame 5, upper fixed block 6, upper clamping block 7, upper hydraulic cylinder 8, first positioning block 9, positioning groove 10, first lifting frame 11, lower fixed block 12, lower clamping block 13, first lifting cylinder 14, lower hydraulic cylinder 15, limit block 16, cutting hydraulic cylinder 17, first moving frame 18, welding head 19, left and right cylinders 20, welding head clamping block 21, second lifting cylinder 22, slot 23, lifting Rod 24, baffle 25, positioning rod 26, first compression spring 27, welding base 28, welding copper ring 29, support hole 30, groove 31, lifting slot 32, proximity switch 33, terminal 34, second positioning block 35, mounting frame 36, slide rod 37, positioning head 38, second compression spring 39, third lifting cylinder 40, second moving frame 41, second lifting frame 42, sleeve 43, lifting rod 44, punching needle 45, third compression spring 46. DETAILED DESCRIPTION

[0048] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0049] like Figure 1 As shown, a spark plug side electrode welding platinum equipment includes a base 1, a cutting mechanism arranged on the base 1 for cutting the platinum wire, a transport mechanism for transporting the cut platinum wire to the welding position, and a welding mechanism for welding the platinum wire on the side electrode. During operation, the platinum wire of the required length is cut by the cutting mechanism, and the platinum wire is transported to the welding position by the transport mechanism. Then the welding mechanism performs welding. Automatic cutting, transporting and welding feeding of the platinum wire are realized, efficiency is improved, and welding quality is high. The operator does not need to use tweezers to clamp the platinum wire and put it on the welding point of the spark plug side electrode, and does not need to use human eyes to distinguish whether the platinum wire stands vertically at the welding point, which reduces labor intensity.

[0050] like Figure 2 , Figure 5 and Figure 6As shown, the cutting mechanism includes a base 1, a feeding mechanism arranged on the base 1 for realizing the interval and fixed distance conveyance of platinum wire, an upper mold 2 arranged on the base 1, and a lower mold 3 arranged on the base 1 for cooperating with the upper mold 2 to cut the platinum wire. The upper mold 2 is fixed on the base 1 through a bracket, which is not shown in the figure. The upper mold 2 and the lower mold 3 are both provided with a through hole 4 cooperating with the platinum wire. When working, the fixed distance downward movement of the platinum wire is realized by the feeding mechanism, the through holes 4 of the upper mold 2 and the lower mold 3 are aligned, and the lower end of the platinum wire passes through the through holes 4 on the upper mold 2 and the lower mold 3, and then the lower mold 3 moves to the left to cut the platinum wire. The platinum wire is stored in the through hole 4 on the lower mold 3, and the feeding of the platinum wire is realized. The structure is simple, the cost is low, and the fixed distance cutting of the platinum wire can be realized with high precision.

[0051] like Figure 2 As shown, the unloading mechanism includes a fixing frame 5 arranged on the base 1, an upper clamping mechanism arranged on the fixing frame 5, and a lower clamping mechanism arranged on the fixing frame 5 and raised and lowered on the fixing frame 5. The fixing frame 5 is fixed on the base 1, and a first groove is provided on the fixing frame 5. When the upper clamping mechanism clamps the platinum wire, the lower clamping mechanism releases the platinum wire and moves upward, and then the lower clamping mechanism clamps the platinum wire, the upper clamping mechanism releases the platinum wire, and the lower clamping mechanism moves downward a short distance, thereby realizing the fixed-distance unloading of the platinum wire.

[0052] like Figure 2 As shown, the upper clamping mechanism includes an upper fixing block 6 fixed in the first groove, and an upper clamping block 7 disposed in the first groove and moving in the first groove. The fixing and loosening of the platinum wire are achieved through the cooperation of the upper fixing block 6 and the upper clamping block 7.

[0053] like Figure 2 As shown, the fixed frame 5 is provided with an upper hydraulic cylinder 8 for driving the upper clamping block 7 to move left and right, the cylinder end of the upper hydraulic cylinder 8 is fixed on the fixed frame 5, and the piston rod end of the upper hydraulic cylinder 8 is connected to the clamping block 7; the front end of the fixed frame 5 is provided with a first positioning block 9, and the first positioning block 9 is fixed to the front end of the fixed frame 5 by screws, and the front ends of the upper fixed block 6 and the upper clamping block 7 are both provided with a positioning groove 10 that cooperates with the first positioning block 9. Through the cooperation between the first positioning block 9 and the positioning groove 10, the height of the upper clamping mechanism can be positioned, and the left and right movement of the upper clamping block 7 can also be guided.

[0054] like Figure 4 As shown, the lower clamping mechanism includes a first lifting frame 11 arranged in the first groove and lifted and lowered in the first groove, a second groove is provided at the front end of the first lifting frame 11, a lower fixing block 12 fixed in the second groove and a lower clamping block 13 moving in the second groove are provided in the second groove.

[0055] like Figure 3 and Figure 4 As shown, the upper end of the fixed frame 5 is provided with a first lifting cylinder 14 for driving the first lifting frame 11 to move up and down. The cylinder end of the first lifting cylinder 14 is fixed to the upper end of the fixed frame 5. The rear end of the first lifting frame 11 extends out of the first groove. The piston rod end of the first lifting cylinder 14 is connected to the part of the rear end of the first lifting frame 11 extending out of the first groove. The side of the first lifting frame 11 is provided with a lower hydraulic cylinder 15 for driving the lower clamping block 13 to move. The side of the part of the rear end of the first lifting frame 11 extending out of the first groove is provided with a connecting plate. The cylinder end of the lower hydraulic cylinder 15 is fixed on the connecting plate, and the piston rod end of the lower hydraulic cylinder 15 is connected to the lower clamping block 13. The lower end of the fixed frame 5 is provided with a limit block 16 for limiting the downward movement limit position of the first lifting frame 11, so as to ensure that the descending distance of the first lifting frame 11 is fixed and the length of the cut platinum wire is fixed.

[0056] like Figure 5 As shown, the base 1 is provided with a cutting hydraulic cylinder 17 for driving the lower die 3 to move left and right.

[0057] like Figure 7 and Figure 8 As shown, the welding mechanism includes a first moving frame 18 disposed on the base 1 and moving on the base 1 , and a welding head 19 disposed on the first moving frame 18 and raised and lowered on the first moving frame 18 .

[0058] like Figure 7 and Figure 8 As shown, the first movable frame 18 is provided with a welding head clamping block 21 which is lifted and lowered on the first movable frame 18, the welding head clamping block 21 is connected to the first movable frame 18 through a guide rail slider, the upper end of the first movable frame 18 is provided with a second lifting cylinder 22, the upper end of the slider of the welding head clamping block 21 is provided with a slot 23, the piston rod end of the second lifting cylinder 22 is provided with a lifting rod 24 which cooperates with the slot 23, the lifting rod 24 is provided with a baffle 25, the welding head clamping block 21 is provided with a positioning rod 26, and a first compression spring 27 is provided between the lifting rod 24 and the positioning rod 26, the upper end of the first compression spring 27 is sleeved on the lifting rod 24 and contacts with the baffle 25, and the lower end of the first compression spring 27 is sleeved on the positioning rod 26 and contacts with the welding head clamping block 21.

[0059] An insulating block is provided between the welding head clamping block 21 and the slider of the welding head clamping block 21 to ensure that a closed loop can be formed during welding.

[0060] Initially, the left and right cylinders pull the flexible welding mechanism to the leftmost initial position, and the upper and lower cylinders pull upward to the highest position. The lifting rods connected to the upper and lower cylinders also follow the lifting, and the upper block clamps the lifting rod to drive the entire upper and lower sliders and welding device to move upward to the highest position. When welding begins, the left and right cylinders push the welding device to the right and stop when it encounters the right limit. Then the upper and lower cylinders push downward, and as the lifting rod moves downward, the slider device connected to the upper block moves downward, and the welding head also moves downward. When the welding head touches the electrode on the spark plug side, welding begins.

[0061] The upward movement of the lifting rod can drive the upper block and the upper and lower sliders to move upward, and the lifting rod moves downward. The upper and lower sliders and the welding device also move downward under the action of gravity, but they will not be forced to move downward, and will hover when encountering resistance. When the welding head contacts the electrode on the spark plug side, the cylinder that moves up and down continues to move down a short distance and then compresses the spring, so that the welding head is firmly attached to the electrode on the spark plug side to prevent the occurrence of false welding.

[0062] The welding head first follows the upper and lower sliders to naturally contact the spark plug side electrode through gravity, and presses on the side electrode in a gentle manner without knocking, preventing the spark plug from bouncing or moving sideways due to strong force.

[0063] After the welding head presses the side electrode, the upper and lower cylinders continue to move downward, the spring is compressed, and the static force between the welding head and the side electrode increases, providing a good fitting state for the subsequent welding process.

[0064] like Fig. 9 , Fig.14 and Fig.15 As shown, the transfer mechanism includes a welding base 28 arranged on the base 1 for transporting platinum wire for cutting the lower die, a flexible pressing mechanism arranged on the base 1 for pressing the transported platinum wire into the welding position, and a lifting and avoiding mechanism for the cutting lower die to evacuate the welding position. A groove 31 is provided in the welding base 28, and a lifting groove 32 is provided in the groove 31. A welding copper ring 29 is provided in the lifting groove 32, and a supporting hole 30 for supporting platinum is provided in the welding copper ring 29; the upper die 2 is also installed on the welding base 28, the upper die 2 is located at the right 2 ends of the welding base, the lower die 3 is arranged on the base and moves left and right on the base, and a cylinder for driving the lower die 3 to move left and right is provided on the base, and a slide groove is provided on the welding base 28, and when the lower die 3 moves left and right, the left end penetrates into the slide groove and slides in the slide groove.

[0065] The height of the lifting groove 32 and the welding copper ring 29 is slightly lower than the height of the bottom of the slide groove in the welding base 28, and the height difference will not be greater than 0.1 mm. When the lower mold 3 moves to the left until the platinum wire moves above the lifting groove 32 and the welding copper ring 29, it will not get stuck, and the length of the lower end of the platinum wire extending out of the lower mold 3 is less than 0.1 mm, and the platinum wire will not be damaged.

[0066] In the initial state, the cut platinum wire is located in the through hole of the lower mold 3, which is a cut hole, and the platinum wire contacts the bottom of the slide groove and does not fall from the cut hole. The lower mold 3 moves left to transport the cut platinum to the welding position, which is located above the welding copper ring 29. At this time, the platinum wire is located above the support hole 30. After that, the flexible pressing mechanism is pressed down to press the platinum wire in the lower mold 3 into the support hole 30. At this time, a small part of the upper end of the platinum wire is still located in the through hole of the lower mold 3. After that, the lifting and avoiding mechanism drives the welding copper ring 29 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 30 and can be completely separated from the lower mold. After that, the flexible pressing mechanism rises, and the lower mold 3 moves right to reset. The spark plug side electrode is manually placed on the platinum wire, and the welding mechanism is used for welding. After welding is completed, the above actions are repeated to realize automatic feeding of platinum, reduce labor intensity, improve efficiency, and ensure welding quality.

[0067] like Fig.10 As shown, a positioning bolt for positioning the lower mold 3 at the left limit position is provided on the welding base 28 at the left end of the slide slot. When the lower mold 3 moves to the left until it contacts the positioning bolt, the lower mold 3 does not move, ensuring that the platinum wire is located above the support hole 30. The flexible pressing mechanism can press the platinum wire into the support hole 30.

[0068] like Fig.17 As shown, a proximity switch 33 for sensing the presence of a spark plug is also provided on the front side of the lifting groove 32. When the proximity switch 33 senses the presence of a spark plug, the lower mold 3 will not move to the left and will not perform a cutting action.

[0069] like Fig.19 As shown, the lifting groove 32 is provided with a terminal 34 in contact with the bottom of the welding copper ring 29. The terminal 34 is connected to the welding machine through a wire. When the spark plug is put in place, the side electrode contacts 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.

[0070] like Fig.16 , Fig.17 and Fig.18As shown, the lifting groove 32 is provided with a second positioning block 35 for positioning the side of the side electrode and a positioning mechanism for positioning the end of the side electrode, and the second positioning block 35 is fixed to the upper end of the lifting groove 32 by screws. After the flexible pressing mechanism and the lifting avoidance mechanism are reset, the spark plug is manually held so that the side electrode side contacts the right end of the second positioning block 35, and the end of the side electrode contacts the positioning mechanism, thereby realizing the precise positioning of the side electrode. The positioning mechanism includes a mounting frame 36 arranged at the upper end of the lifting groove 32, a slide bar 37 arranged on the mounting frame 36 and sliding on the mounting frame 36, and a positioning head 38 arranged at the right end of the slide bar 37, the mounting frame 36 is provided with a through hole, the left end of the slide bar 37 passes through the through hole and slides in the through hole, the left end of the slide bar 37 is provided with an end plate to prevent the slide bar 37 from falling from the through hole, and the slide bar 37 is provided with a second compression spring 39, the left end of the second compression spring 39 contacts the mounting frame 36, and the right end of the second compression spring 39 contacts the positioning head 38. When the lower mold 3 moves to the left, it first contacts the positioning head 38, and the second compression spring 39 is compressed and will not interfere with the movement of the lower mold 3. After the lower mold 3 moves to the right and resets, under the action of the second compression spring 39, the positioning head 38 moves to the right, and the right end of the positioning head 38 extends out of the second positioning block 35, and cooperates with the second positioning block 35 to form a right-angle positioning groove, thereby positioning the side electrode.

[0071] like Fig.16 As shown, the lifting and avoiding mechanism includes a third lifting cylinder 40 whose piston rod end is connected to the lifting groove 32, a connecting plate is provided at the lower end of the base 1, a sliding rod connected to the piston rod of the third lifting cylinder 40 is provided at the lower end of the lifting groove 32, and a guide sleeve for guiding the sliding of the sliding rod is provided in the connecting plate.

[0072] The initial position of the lifting avoidance mechanism is that the upper surface of the lifting groove 32 is in the same plane as the upper surface of the welding copper ring 29, and is 0.1 mm lower than the lower surface of the slide groove of the welding base 28, so that it will not interfere with the left and right movement of the lower mold, and will not cause the platinum wire stored in the lower mold to leak out.

[0073] Afterwards, the lifting mechanism moves downward under the action of the first and third lifting cylinders 40. At this time, the platinum wire is still pressed into the support hole 30 by the flexible pressing mechanism, but the platinum wire as a whole has completely separated from the lower mold. Afterwards, the flexible pressing mechanism resets upward and backward, and the entire flexible pressing device moves backward back to its original position. For example, the depth of the support hole 30 is 0.6 mm, and the length of the platinum wire is 0.9 mm. When initially pressed down, the platinum wire will be 0.2 mm in the lower mold, and then the lifting slot 32 needs to be lowered by more than 0.2 mm. This can be adjusted according to actual needs, and no further details will be given here.

[0074] After that, the lower die moves to the right under the action of the cylinder, stops when it hits the right limit, and returns to the platinum wire cutting position. Because the platinum wire moves downward for a distance, there is a gap between the upper end of the platinum wire and the lower die, and the lower die will not touch the platinum wire when it withdraws. At this time, the platinum wire remains in the support hole 30, ready for welding.

[0075] By setting up a lifting and avoiding mechanism, when initially pressing down, the welding copper ring 29 is in a high position, and the gap between the upper surface of the welding copper ring 29 and the lower surface of the lower mold is the smallest, less than 0.1 mm, to ensure 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 supporting hole 30 of the welding copper ring 29 without being squeezed and damaged.

[0076] like Fig.11 As shown, the flexible material pressing mechanism includes a second moving frame 41 disposed on the base 1 and moving forward and backward on the base 1, a second lifting frame 42 disposed on the second moving frame 41 and lifting and lowering on the moving frame, and a pressing mechanism disposed on the second lifting frame 42. The lower end of the second moving frame 41 is connected to the base 1 via a guide rail slider, a cylinder for driving the second moving frame 41 to move forward and backward is disposed on the base 1, the second lifting frame 42 is connected to the second moving frame 41 via a guide rail slider, and a cylinder for driving the second lifting frame 42 to lift and lower is disposed on the upper end of the second moving frame 41.

[0077] like Fig.12 and Fig.13 As shown, the pressing mechanism includes a sleeve 43 arranged on the second lifting frame 42, a lifting rod 44 arranged at the lower end of the sleeve 43 and the upper end of which is inserted into the sleeve 43 and slides in the sleeve 43, and a punch 45 arranged at the lower end of the lifting rod 44. A third compression spring 46 is provided in the sleeve 43, and the lower end of the third compression spring 46 is in contact with the upper end of the lifting rod 44, and the upper end of the third compression spring 46 is in contact with the upper end of the sleeve 43.

[0078] After the lower die drives the platinum wire to move into position, the second moving frame 41 moves forward and stops when it encounters a limit screw. Then the second lifting frame 42 pushes downward, and the punch 45 is inserted into the through hole of the lower die, and the platinum wire in the through hole is punched into the support hole. The sleeve 43 is equipped with a third compression spring 46, and the punch presses the platinum wire downward into the support hole set in the welding copper ring with a flexible force. The third compression spring 46 in the flexible pressing device is compressed by more than 5mm to ensure that when the welding copper ring descends, the punch always presses the platinum wire with a flexible force.

[0079] The second lifting frame 42 is provided with guide pins respectively matched with the through holes on the welding base 28 and the through holes on the lower die to achieve accurate positioning of the punching needle and the welding position.

[0080] The technical solution provided in this application can be used for all metal wires that can be cut, such as nickel alloy wire, platinum wire, iridium wire, etc., and is not limited to platinum wire. This application only uses platinum wire as an example.

[0081] This application can weld one or more platinum points on a spark plug side electrode at one time. This application takes single platinum point welding as an example.

[0082] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "left", "right", "up", "down", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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, and therefore cannot be understood as a limitation on the present invention.

[0083] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection, it can be a direct connection, it can be an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A spark plug side electrode welding platinum equipment, characterized in that: It comprises a base (1), a cutting mechanism arranged on the base (1) for cutting the platinum wire, a transport mechanism for transporting the cut platinum wire to a welding position, and a welding mechanism for welding the platinum wire on a side electrode; The transfer mechanism comprises a welding base (28) arranged on the base (1) for the cutting lower die to transport the platinum wire, a flexible material pressing mechanism arranged on the base (1) for pressing the transported platinum wire into the welding position, and a lifting and avoiding mechanism for the cutting lower die to evacuate the welding position, wherein the welding base (28) is provided with a groove (31), the groove (31) is provided with a lifting groove (32), the lifting groove (32) is provided with a welding copper ring (29), and the welding copper ring (29) is provided with a supporting hole (30) for supporting platinum.

2. A spark plug side electrode welding platinum equipment as claimed in claim 1, characterized in that: The cutting mechanism comprises a feeding mechanism arranged on the base (1) for realizing the intermittent and fixed-distance conveyance of the platinum wire, an upper die (2) arranged on the base (1), and a lower die (3) arranged on the base (1) and movable leftward and rightward for cooperating with the upper die (2) to cut the platinum wire, wherein both the upper die (2) and the lower die (3) are provided with a through hole (4) cooperating with the platinum wire.

3. A spark plug side electrode welding platinum equipment as claimed in claim 2, characterized in that: The unloading mechanism comprises a fixing frame (5) arranged on the base (1), an upper clamping mechanism arranged on the fixing frame (5), and a lower clamping mechanism arranged on the fixing frame (5) and raised and lowered on the fixing frame (5); the fixing frame (5) is provided with a first groove.

4. A spark plug side electrode welding platinum equipment as claimed in claim 3, characterized in that: The upper clamping mechanism comprises an upper fixing block (6) fixed in the first groove, and an upper clamping block (7) arranged in the first groove and moving in the first groove; The lower clamping mechanism comprises a first lifting frame (11) arranged in the first groove and lifted in the first groove, a second groove is provided at the front end of the first lifting frame (11), a lower fixing block (12) fixed in the second groove and a lower clamping block (13) moving in the second groove are provided in the second groove; A limit block (16) is provided at the lower end of the fixing frame (5) for limiting the downward movement limit position of the first lifting frame (11).

5. A spark plug side electrode welding platinum equipment as claimed in claim 1, characterized in that: The welding mechanism comprises a first movable frame (18) arranged on the base (1) and moving on the base (1), and a welding head (19) arranged on the first movable frame (18) and rising and falling on the first movable frame (18).

6. A spark plug side electrode welding platinum device as claimed in claim 5, characterized in that: The first movable frame (18) is provided with a welding head clamping block (21) which is lifted and lowered on the first movable frame (18); the welding head clamping block (21) is connected to the first movable frame (18) via a guide rail slider; a second lifting cylinder (22) is provided at the upper end of the first movable frame (18); a slot (23) is provided at the upper end of the slider of the welding head clamping block (21); a lifting rod (24) which cooperates with the slot (23) is provided at the piston rod end of the second lifting cylinder (22); a baffle (25) is provided on the lifting rod (24); a positioning rod (26) is provided on the welding head clamping block (21); a first compression spring (27) is provided between the lifting rod (24) and the positioning rod (26); the upper end of the first compression spring (27) is sleeved on the lifting rod (24) and contacts with the baffle (25); the lower end of the first compression spring (27) is sleeved on the positioning rod (26) and contacts with the welding head clamping block (21).

7. A spark plug side electrode welding platinum equipment as claimed in claim 1, characterized in that: A proximity switch (33) for sensing the presence of a spark plug is also provided on the front side of the lifting slot (32); The lifting groove (32) is provided with a connection terminal (34) in contact with the bottom of the welding copper ring (29); The lifting groove (32) is provided with a second positioning block (35) for positioning the side of the side electrode and a positioning mechanism for positioning the end of the side electrode, the positioning mechanism comprises a mounting frame (36) arranged at the upper end of the lifting groove (32), a slide bar (37) arranged on the mounting frame (36) and sliding on the mounting frame (36), and a positioning head (38) arranged at the right end of the slide bar (37), and a second compression spring (39) is provided on the slide bar (37), the left end of the second compression spring (39) is in contact with the mounting frame (36), and the right end of the second compression spring (39) is in contact with the positioning head (38).

8. A spark plug side electrode welding platinum equipment as claimed in claim 1, characterized in that: The lifting and avoiding mechanism comprises a third lifting cylinder (40) whose piston rod end is connected to the lifting groove (32).

9. A spark plug side electrode welding platinum device as claimed in claim 1, characterized in that: The flexible material pressing mechanism comprises a second movable frame (41) arranged on the base (1) and moving forward and backward on the base (1), a second lifting frame (42) arranged on the second movable frame (41) and lifting and lowering on the movable frame, and a pressing mechanism arranged on the second lifting frame (42).

10. A spark plug side electrode welding platinum device as claimed in claim 9, characterized in that: The pressing mechanism comprises a sleeve (43) arranged on the second lifting frame (42), a lifting rod (44) arranged at the lower end of the sleeve (43) and the upper end of which is inserted into the sleeve (43) and slides in the sleeve (43), and a punching needle (45) arranged at the lower end of the lifting rod (44); a third compression spring (46) is arranged in the sleeve (43); the lower end of the third compression spring (46) contacts the upper end of the lifting rod (44), and the upper end of the third compression spring (46) contacts the upper end of the sleeve (43).

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