CN111347142B - Spot welding machine head for punching and welding in mould - Google Patents
Spot welding machine head for punching and welding in mould Download PDFInfo
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- CN111347142B CN111347142B CN202010332806.6A CN202010332806A CN111347142B CN 111347142 B CN111347142 B CN 111347142B CN 202010332806 A CN202010332806 A CN 202010332806A CN 111347142 B CN111347142 B CN 111347142B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/10—Spot welding; Stitch welding
- B23K11/11—Spot welding
- B23K11/115—Spot welding by means of two electrodes placed opposite one another on both sides of the welded parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/30—Features relating to electrodes
- B23K11/31—Electrode holders and actuating devices therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P23/00—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
- B23P23/04—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass for both machining and other metal-working operations
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Abstract
The invention discloses a spot welding machine head for in-mold punching welding, belongs to the field of resistance welding equipment, and aims to provide a spot welding machine head with a compact structure and improve the stability and efficiency of spot welding. The punching press comprises a mounting seat, an upper electrode and a lower electrode which are arranged on the mounting seat, and a power mechanism for transferring punching force; the axis of the upper electrode is arranged along the horizontal direction, and the axis of the lower electrode is arranged along the vertical direction; the upper electrode is positioned above the lower electrode, a welding space is formed between the upper electrode and the lower electrode, and a groove which is axially penetrated along the upper electrode and is provided with an opening facing the lower electrode is arranged on the upper electrode; the power mechanism is connected with the upper electrode and drives the upper electrode to move up and down linearly relative to the lower electrode. The spot welding machine head is compact in structure, simple to maintain, low in cost and 3-5 times of the original production efficiency, and a spot-welded product is tested to have good binding force.
Description
Technical Field
The invention belongs to the field of resistance welding equipment, and particularly relates to a spot welding machine head for in-mold punching welding.
Background
With the rapid development of the power industry, the switching device needs to carry larger current and has high feasibility and stability. The contact spring as the core element in the switch electric appliance mainly plays the role of connecting, bearing and breaking current, and the performance of the contact spring is decisive for the safety and the applicability of the switch electric appliance, so that the contact spring has good mechanical performance and electrical conductivity. The contact spring sheet produced by the punching and welding process has the advantages of high bonding strength and small contact resistance, is applied to switching appliances, and has high reliability and stability. The key of the in-mold stamping welding is spot welding, namely, the silver point is spot welded on the strip in advance.
The traditional welding of the contact spring mainly has the following two modes: 1. the contact and the elastic sheet are produced respectively, then the jig is designed, and welding is carried out. 2. The method is characterized in that a vertical spot welding device is additionally arranged before a material belt enters a die, then the material belt enters the die to be punched and cut into products, welding devices need to be purchased independently, meanwhile, the welding devices are large in size and need large space to establish a production line, and early investment is high. And, because the production line is long, the management and control point in the production process is more, and the product percent of pass is low, and production efficiency is low.
Disclosure of Invention
The invention aims to provide an electric welding head for in-mold punching welding with a compact structure, so as to improve the stability and efficiency of spot welding.
The technical scheme adopted by the invention is as follows: the spot welding machine head for punching and welding in the die comprises a mounting seat, an upper electrode and a lower electrode which are arranged on the mounting seat, and a power mechanism for transmitting punching force;
the axis of the upper electrode is arranged along the horizontal direction, and the axis of the lower electrode is arranged along the vertical direction; the upper electrode is positioned above the lower electrode, a welding space is formed between the upper electrode and the lower electrode, and a groove which is axially penetrated along the upper electrode and is provided with an opening facing the lower electrode is arranged on the upper electrode; the power mechanism is connected with the upper electrode and drives the upper electrode to move up and down linearly relative to the lower electrode.
Further, the device also comprises a wire feeding mechanism and an upper cutter;
the wire feeding mechanism is provided with a wire passage for threading, and the wire passage is communicated with the groove of the upper electrode through the wire feeding mechanism;
the upper cutter is arranged below the wire channel and is positioned between the upper electrode and the wire feeding mechanism along the wire conveying direction, and the upper cutter is connected with a power mechanism and is driven to reciprocate up and down by the power mechanism; and the upper cutter and the upper electrode move in the opposite direction under the driving of the power mechanism.
Further, the wire feeding mechanism comprises a core body, wherein an upper mounting groove with an upward opening and a lower mounting groove with a downward opening are formed in the core body, and the core body is divided into a left section on the left side of the upper mounting groove and a right section on the right side of the upper mounting groove along the wire conveying direction by the upper mounting groove; the core body is also provided with a wire channel which is communicated with the upper mounting groove and the lower mounting groove from one end to the other end;
a wire traction mechanism and a second lifting tooth are arranged in the extension direction of the wire channel, and the wire traction mechanism is positioned in front of the second lifting tooth along the wire conveying direction;
the wire traction mechanism comprises a first floating tooth and a copper seat; the copper seat is movably arranged in the upper mounting groove along the wire conveying direction; a movable area is formed by the copper seat and the upper mounting groove in an enclosing mode, the first floating tooth is located in the movable area and is movably connected with the copper seat along the vertical direction, and a wire passing space communicated with the wire channel is formed between the first floating tooth and the copper seat; the second floating tooth is vertically and movably arranged in the lower mounting groove and is positioned below the wire channel;
and a power bolt for driving the first floating tooth and the second floating tooth to move along the vertical direction in a reverse direction is also arranged.
Further, a bolt hole is formed in the core body, penetrates through the right side section and the upper mounting groove along the wire conveying direction and extends to the left side section; the power bolt is arranged in the bolt hole, the middle of the power bolt is hinged with the core body, one end of the power bolt is positioned below the first floating tooth and matched with the first floating tooth, and the other end of the power bolt is positioned below the second floating tooth and matched with the second floating tooth; and is provided with a driving structure for driving the power bolt lever to move; the driving structure comprises a steel column and a telescopic spring; a vertical column pin hole is formed in the left section, a steel column is movably mounted in the column pin hole, and the steel column is positioned above the power bolt and matched with the power bolt; and along vertical, expanding spring installs between second buoyancy lift tooth and the right side section.
Furthermore, a first transmission rod is arranged between the copper seat and the first floating tooth, one end of the first transmission rod penetrates through the butterfly-shaped elastic sheet and the copper seat in sequence to be connected with the first floating tooth, and the first transmission rod is movably connected with the copper seat along the axial direction of the first transmission rod.
Furthermore, the power mechanism comprises a support, a stud, a stop block and a rotating pin; the stud is arranged in the support and is movably connected with the support along the axial direction of the support, and a first return spring is arranged between the bottom of the stud and the support; the stop block is arranged on the support and is movably connected with the support along the axial direction of the support; the rotating pin is hinged to the support, one end of the rotating pin, which is positioned at the hinged point, is connected with the stop block, and the other end of the rotating pin, which is positioned at the hinged point, is connected with the stud; the upper cutter is connected to a stopper.
Further, the copper seat is connected with a stud of the power mechanism through a transmission mechanism;
the top end of the steel column is matched with the stud of the power mechanism through the transmission mechanism.
Furthermore, the transmission mechanism comprises a right side plate, a left side plate, a trigger and a pressing block; the trigger is movably connected between the right side plate and the left side plate through a rotating shaft; the trigger comprises a front end and a rear end, and the front end and the rear end are respectively arranged at two sides of the rotating shaft along the conveying direction of the wire rod; the pressing block is arranged at the bottom end of the trigger and is positioned between the front end and the rear end;
the rear end of the trigger is connected with the stud, and the front end of the trigger is connected with the copper seat;
the pressing block is vertically positioned above the steel column and matched with the steel column.
Furthermore, the transmission mechanism also comprises two pressure rods which are respectively and movably arranged on the right side plate and the left side plate along the vertical direction, and a second reset spring for driving the pressure rods to reset is arranged between the pressure rods and the right side plate and between the pressure rods and the left side plate;
and the compression bar is positioned above the first transmission rod along the vertical direction and drives the first transmission rod to vertically move through the compression bar.
Further, the mounting seat comprises an adjusting base, an upper bracket and a lower bracket; the lower support is arranged on the adjusting base, and the upper support is movably connected to the lower support along the vertical direction;
the upper electrode is arranged on an upper fixing block, and the upper fixing block is arranged on an upper bracket;
the lower electrode is arranged on a lower fixing block, and the lower fixing block is arranged on a lower bracket;
the upper bracket is connected with a stud of the power mechanism.
The invention has the beneficial effects that: the invention has the advantages of stable equipment, compact structure, simple maintenance and low cost, and can meet the wire feeding requirements of different products. The spot welding device can be fused with a stamping device, and stamping and welding are completed simultaneously, so that a plurality of processes are reduced into one process, namely, the production process is simplified, the production efficiency is 3-5 times that of the prior art, and a spot-welded product has good binding force through testing.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
FIG. 2 is a schematic structural diagram of an upper electrode assembly according to the present invention.
Fig. 3 is a schematic view of the structure of the lower electrode assembly of the present invention.
Fig. 4 is a schematic structural view of the wire feeding mechanism of the present invention.
Fig. 5 is a schematic structural diagram of the transmission mechanism of the present invention.
Fig. 6 is a schematic structural diagram of the power mechanism according to the present invention.
In the figure, an upper electrode 1-1, a groove 1-2, a lower electrode 3-1, a mounting seat 4-0, an adjusting base 4-1, an upper bracket 4-2, a lower bracket 4-3, an upper fixing block 4-4 and a lower fixing block 4-5; 5-0 parts of a wire feeding mechanism, 5-1 parts of a core body, 5-1A parts of a left side section, 5-1B parts of a right side section, 5-1C parts of a left square hole, 5-1D parts of a right square hole, 5-1E parts of a bolt hole, 5-1F parts of a column pin hole, 5-2 parts of an upper mounting groove, 5-3 parts of a first floating tooth, 5-4 parts of a first transmission rod, 5-5 parts of a second floating tooth, 5-6 parts of a lower mounting groove, 5-7 parts of a copper seat, 5-8 parts of a butterfly-shaped elastic sheet, 5-9 parts of a power bolt, 5-10 parts of a steel column, 5-11 parts of a left bolt, 5-11A parts of a left wire passing hole, 5-12 parts of a right bolt, 5-12A parts of a right wire passing hole and 5-13 parts of a telescopic spring;
6-0 part of transmission mechanism, 6-1 part of right side plate, 6-2 parts of left side plate, 6-3 parts of trigger, 6-4 parts of rotating shaft, 6-5 parts of pressing block, 6-6 parts of pressing rod and 6-7 parts of reset spring II;
the device comprises a power mechanism 7-0, a support 7-1, a stud 7-2, an upper cutter 7-3, a rotating pin 7-4, a first return spring 7-5 and a stop block 7-6.
Detailed Description
The invention is further described below with reference to the following figures and examples:
a spot welding machine head for punching and welding in a mould is shown in figure 1, figure 2 and figure 3 and comprises a mounting seat 4-0, an upper electrode 1-1 and a lower electrode 3-1 which are arranged on the mounting seat 4-0 and a power mechanism 7-0 for transmitting punching force; the axis of the upper electrode 1-1 is arranged along the horizontal direction, and the axis of the lower electrode 3-1 is arranged along the vertical direction; the upper electrode 1-1 is positioned above the lower electrode 3-1, a welding space is formed between the upper electrode 1-1 and the lower electrode 3-1, and a groove 1-2 which is axially communicated along the upper electrode 1-1 and provided with an opening facing the lower electrode 3-1 is formed in the upper electrode 1-1; the power mechanism 7-0 is connected with the upper electrode 1-1 and drives the upper electrode 1-1 to move up and down linearly relative to the lower electrode 3-1.
The invention discloses a spot welding machine head for in-mold stamping welding.A shaft line of a lower electrode 3-1 is vertically arranged, so that a platform for supporting a strip is formed at the top end of the lower electrode 3-1; the axis of the upper electrode 1-1 is arranged along the horizontal direction, a groove 1-2 is arranged on one side of the upper electrode 1-1 facing the welding space, the groove 1-2 is used for a wire to penetrate, and after the upper electrode 1-1 is pressed down, the wire can be ensured to move down and contact a strip material.
The power mechanism 7-0 is connected with the upper electrode 1-1 to transmit the stamping force and drive the upper electrode 1-1 to move up and down linearly relative to the lower electrode 3-1, so that the upper electrode 1-1 stamps downwards to enable the wire to contact the strip on the lower electrode 3-1, and the upper electrode 1-1 and the lower electrode 3-1 are arranged to generate electric arcs between the electrified wire section and the strip so as to fuse the wire section and the strip together, so that the stamping and welding can be completed simultaneously, one process is reduced, the process flow is shortened, the product qualification rate is improved, and the production efficiency is also improved.
And, because the actuating unit 7-0 plays the function of transmitting the force of punching press, can cooperate with punch press directly, namely the punch press is regarded as the power supply and provided the punching press force, because the punching press efficiency of the punch press is high, the punching speed of the medium speed punch press can reach 120 times/minute, when the spot welding aircraft nose of the invention is used with the punch press amalgamation, the welding efficiency can reach 75 times/minute.
In order to realize continuous wire feeding, the wire feeding device preferably further comprises a wire feeding mechanism 5-0 and an upper cutter 7-3; the wire feeding mechanism 5-0 is provided with a wire passage for threading, and the wire passage is communicated with the groove 1-2 of the upper electrode 1-1 through the wire feeding mechanism 5-0; the upper cutter 7-3 is arranged below the wire channel and is positioned between the upper electrode 1-1 and the wire feeding mechanism 5-0 along the wire conveying direction, the upper cutter 7-3 is connected with the power mechanism 7-0, and the upper cutter 7-3 is driven to reciprocate up and down by the power mechanism 7-0; and the upper cutter 7-3 and the upper electrode 1-1 move up and down in reverse direction under the driving of the power mechanism 7-0.
The wire feeding mechanism 5-0 is used for conveying the wire to the welding space through the wire channel, and the wire channel can ensure the reliability of wire conveying and has a certain straightening function on the wire. The wire passage is communicated with the groove 1-2, so that the wire is conveyed into the groove 1-2 through the wire passage to ensure the welding position of the wire and the strip. And the upper cutter 7-3 is arranged below the wire rod channel, so that the upper cutter 7-3 upwards cuts off the wire rod, and the cutting reliability of the wire rod is ensured. The upper cutter 7-3 is positioned between the upper electrode 1-1 and the wire feeding mechanism 5-0 along the wire conveying direction, namely the wire cutting position is positioned behind the upper electrode 1-1 and in front of the wire feeding mechanism 5-0, which is beneficial to ensuring that the cutting length of the wire meets the requirement. The upper cutter 7-3 and the upper electrode 1-1 move up and down in a reverse direction, so that the wire is pressed down while being sheared, the whole welding time can be shortened, and the efficiency is improved.
The power mechanism 7-0 not only plays a role in driving the upper electrode 1-1 to move, but also provides a role in cutting the wire, achieves the effect of multiple purposes of one part, enables the power source of the upper electrode 1-1 and the power source of the upper cutter 7-3 to be consistent, is more beneficial to improving the compactness of the spot welding machine head structure, and improves the coordination consistency of the actions among all the components.
The wire feeding mechanism 5-0 can be two groups of rollers rotating reversely, a wire channel is arranged between the two groups of rollers, and wire feeding is completed through rotation of the rollers, however, a wire feeding error exists between rotation and stop of the rollers, and control of the wire feeding length is not facilitated. In the invention, as shown in FIG. 4, the wire feeding mechanism 5-0 comprises a core body 5-1, an upper mounting groove 5-2 with an upward opening and a lower mounting groove 5-6 with a downward opening are arranged on the core body 5-1, and the core body 5-1 is divided into a left section 5-1A at the left side of the upper mounting groove 5-2 and a right section 5-1B at the right side along the wire conveying direction by the upper mounting groove 5-2; the core body 5-1 is also provided with a wire channel which is communicated with the upper mounting groove 5-2 and the lower mounting groove 5-6 from one end to the other end;
a wire traction mechanism and a second lifting tooth 5-5 are arranged in the extension direction of the wire channel, and the wire traction mechanism is positioned in front of the second lifting tooth 5-5 along the wire conveying direction;
the wire traction mechanism comprises a first floating tooth 5-3 and a copper seat 5-7; the copper seat 5-7 is movably arranged in the upper mounting groove 5-2 along the conveying direction of the wires; a movable area is formed by the copper seat 5-7 and the upper mounting groove 5-2 in an enclosing mode, the first floating tooth 5-3 is located in the movable area and is movably connected with the copper seat 5-7 along the vertical direction, and a wire passing space communicated with the wire channel is arranged between the first floating tooth 5-3 and the copper seat 5-7; the second floating teeth 5-5 are vertically and movably arranged in the lower mounting grooves 5-6 and are positioned below the wire channel;
and a power bolt 5-9 for driving the first floating tooth 5-3 and the second floating tooth 5-5 to move along the vertical direction in a reverse direction is also arranged.
According to the invention, the upper mounting groove 5-2, the lower mounting groove 5-6 and the wire rod channel 5-0 are arranged on the core body 5-1, so that a wire rod is exposed at the upper mounting groove 5-2 and the lower mounting groove 5-6 after penetrating into the wire rod channel 5-0.
A left square hole 5-1C penetrating through the left section 5-1A along the wire conveying direction is formed in the left section 5-1A, a right square hole 5-1D penetrating through the right section 5-1B along the wire conveying direction is formed in the right section 5-1B, and the left square hole 5-1C and the right square hole 5-1D are coaxial; the left bolt 5-11 is provided with a left wire passing hole 5-11A which axially penetrates along the left bolt 5-11, and the right bolt 5-12 is provided with a right wire passing hole 5-12A which axially penetrates along the right bolt 5-12; the left bolt 5-11 is inserted in the left square hole 5-1C, the right bolt 5-12 is inserted in the right square hole 5-1D, and the wire channel is formed by the left wire passing hole 5-11A and the right wire passing hole 5-12A.
The wire traction mechanism is positioned in front of the second lifting teeth 5-5, namely the wire is conveyed from the side of the second lifting teeth 5-5 to the side of the wire traction mechanism.
The first floating tooth 5-3 is vertically and movably arranged in an active area surrounded by the copper seat 5-7 and the upper mounting groove 5-2, namely the first floating tooth 5-3 can vertically reciprocate in the upper mounting groove 5-2, so that when the first floating tooth 5-3 vertically moves downwards to a low position, the distance between the copper seat 5-7 and the first floating tooth 5-3 is increased, a hole communicated with the upper mounting groove 5-2 is exposed by the wire passage 5-0, and a wire can smoothly penetrate into the wire passage 5-0; when the first floating tooth 5-3 moves upwards to a high position along the vertical direction, the gap between the copper seat 5-7 and the first floating tooth 5-3 is reduced, so that the purpose of clamping the wire is achieved, and the wire can be effectively prevented from being cut and damaged as the copper seat 5-7 and the first floating tooth 5-3 are arranged oppositely, and the space between the copper seat 5-7 and the first floating tooth 5-3 is aligned with the wire channel. Of course, in order to ensure that the first lift teeth 5-3 and the second lift teeth 5-5 do not scratch the wire, it is necessary to plate a wear-resistant layer on the surfaces of the first lift teeth 5-3 and the second lift teeth 5-5 that contact the wire.
As the first floating tooth 5-3 is connected with the copper seat 5-7 and the copper seat 5-7 is movably arranged in the upper mounting groove 5-2 along the conveying direction of the wire rod, the copper seat 5-7 can drive the first floating tooth 5-3 to linearly reciprocate in the upper mounting groove 5-2 together, and the purpose of drawing the wire rod to move for a specific distance can be realized through the linear reciprocating motion of the copper seat 5-7 in the upper mounting groove 5-2 and the vertical reciprocating motion of the first floating tooth 5-3.
The second floating tooth 5-5 is positioned below the wire channel 5-0 and is movably arranged in the lower mounting groove 5-6 along the vertical direction, namely the second floating tooth 5-5 can vertically reciprocate in the lower mounting groove 5-6, so that when the second floating tooth 5-5 is positioned at a low position along the vertical direction, a hole communicated with the lower mounting groove 5-6 of the wire channel 5-0 is exposed, and a wire can smoothly penetrate into the wire channel 5-0; when the second floating teeth 5-5 move upwards to a high position along the vertical direction, the second floating teeth 5-5 upwards support the passing wire, so that the wire is fixed at the rear, the wire can be prevented from sliding, and the wire conveying accuracy is improved.
The first power mechanism drives the first floating tooth 5-3 and the second floating tooth 5-5 to move along the vertical direction in a reverse direction, namely when the first floating tooth 5-3 moves vertically upwards, the second floating tooth 5-5 moves vertically downwards, and vice versa. In this way, when the first lifting tooth 5-3 fixes the wire in the front direction, the second lifting tooth 5-5 releases the wire; when the first lifting tooth 5-3 releases the wire, the second lifting tooth 5-5 fixes the wire at the rear.
When the second floating tooth 5-5 fixes the wire at the rear part, the first floating tooth 5-3 can be driven by the copper seat 5-7 to move backwards along the wire conveying direction; after the first floating tooth 5-3 fixes the wire and the second floating tooth 5-5 loosens the wire, the copper seat 5-7 drives the first floating tooth 5-3 to move forward along the wire conveying direction, thereby realizing the purpose of conveying the wire forward.
The wire feeding mechanism can ensure that the wire feeding length is consistent every time, and avoid waste caused by inconsistent length of the conveyed wires; and the reliability of wire feeding is also ensured.
A first transmission rod 5-4 is arranged between the copper seat 5-7 and the first lifting tooth 5-3, one end of the first transmission rod 5-4 penetrates through the butterfly-shaped elastic sheet 5-8 and the copper seat 5-7 in sequence along the vertical direction to be connected with the first lifting tooth 5-3, and the first transmission rod 5-4 is movably connected with the copper seat 5-7 along the axial direction.
The first buoyancy lifting tooth 5-3 and the second buoyancy lifting tooth 5-5 can be driven to move in the vertical direction in a reverse direction by taking a hydraulic or pneumatic power system as a first power mechanism. In order to simplify the overall structure and make the whole wire feeding mechanism more compact in structure and lower in maintenance cost, preferably, a bolt hole 5-1E is arranged on the core body 5-1, and the bolt hole 5-1E penetrates through the right section 5-1B and the upper mounting groove 5-2 along the wire conveying direction and extends to the left section 5-1A; the power bolt is characterized by comprising a power bolt 5-9, wherein the power bolt 5-9 is arranged in a bolt hole 5-1E, the middle part of the power bolt is hinged with a core body 5-1, one end of the power bolt is positioned below a first floating tooth 5-3 and matched with the first floating tooth 5-3, and the other end of the power bolt is positioned below a second floating tooth 5-5 and matched with the second floating tooth 5-5; and is provided with a driving structure for driving the power bolt 5-9 to move in a lever way; the driving structure comprises steel columns 5-10 and extension springs 5-13; a vertical column pin hole 5-1F is formed in the left section 5-1A, a steel column 5-10 is movably mounted in the column pin hole 5-1F, and the steel column 5-10 is located above the power bolt 5-9 and matched with the power bolt 5-9; and along the vertical direction, the expansion spring 5-13 is arranged between the second floating tooth 5-5 and the right section 5-1B.
In the above embodiment, the power mechanism 7-0 not only provides power for wire feeding but also provides power for wire shearing. The power mechanism can be a hydraulic system, a hydraulic cylinder of the hydraulic system drives the copper seat to reciprocate 5-7, one hydraulic cylinder drives the transmission rod to reciprocate 5-4, and the other hydraulic cylinder drives the cutter to cut off the wire. However, the hydraulic system is complex in structure and high in cost. Most preferably, as shown in fig. 6, the power mechanism 7-0 preferably comprises a support 7-1, a stud 7-2, a stop 7-6 and a rotating pin 7-4;
the stud 7-2 is arranged in the support 7-1 and is movably connected with the support 7-1 along the axial direction of the support 7-1, and a first return spring 7-5 is arranged between the bottom of the stud 7-2 and the support 7-1; the stop block 7-6 is arranged on the support 7-1 and is movably connected with the support 7-1 along the axial direction of the support 7-1; the rotating pin 7-4 is hinged to the support 7-1, one end of the rotating pin, which is positioned at the hinged point, is connected with the stop block 7-6, and the other end of the rotating pin, which is positioned at the hinged point, is connected with the stud 7-2; the upper cutter 7-3 is connected to the stopper 7-6.
The support 7-1 is used for mounting a support stud 7-2 and an upper cutter 7-3, a cylindrical mounting hole with an upward opening is formed in the support 7-1 along the axial direction of the support 7-1, the stud 7-2 is inserted into the cylindrical mounting hole, the top end of the stud extends out of the cylindrical mounting hole, and the stud can reciprocate up and down along the axial direction of the cylindrical mounting hole. A cutter mounting groove is further formed in the support 7-1 beside the cylindrical mounting hole along the axial direction of the support 7-1, the upper cutter 7-3 is mounted in the cutter mounting groove, and the upper cutter 7-3 can reciprocate up and down along the axial direction of the cutter mounting groove. When pressure is applied to the top end of the stud 7-2, the stud 7-2 moves downwards to drive the rotating pin 7-4 to rotate, and further drive the upper cutter 7-3 to move upwards, and the upper cutter 7-3 is close to the upper electrode 1-1 to cut off the wire. When the stud 7-2 moves upwards and resets, the rotating pin 7-4 is driven to rotate reversely, and then the upper cutter 7-3 is driven to move downwards, and the upper cutter 7-3 is far away from the upper electrode 1-1. The driving force for driving the stud 7-2 to move upwards and reset can be tensile force applied to the top end of the stud 7-2, in the invention, the driving force is elastic force of a first return spring 7-5, the first return spring 7-5 is arranged between the stud 7-2 and the support 7-1, when the stud 7-2 is pressed and moved downwards, the first return spring 7-5 is compressed, and when the pressure disappears, the first return spring 7-5 extends and resets to drive the stud 7-2 to move upwards and reset.
In order to transmit pressure to the copper seat 5-7 by utilizing the power mechanism 7-0 and drive the copper seat 5-7 to move so as to achieve the purpose of wire feeding, the copper seat 5-7 is connected with the stud 7-2 of the power mechanism 7-0 through the transmission mechanism 6-0. Therefore, the pressure for driving the stud 7-2 to move downwards is transmitted to the copper seat 5-7 through the transmission mechanism 6-0 to drive the copper seat 5-7 to move, and the purpose of wire feeding is achieved; on the other hand, the wire is transferred to the upper cutting knife 7-3 to realize the purpose of cutting off the wire.
The top end of the steel column 5-10 is matched with the stud 7-2 of the power mechanism 7-0 through the transmission mechanism 6-0.
The transmission mechanism 6-0 and the power mechanism 7-0 provide power for the movement of the copper seat 5-7 and power for the movement of the steel column 5-10, so that the power sources of the copper seat 5-7 and the steel column 5-10 are consistent.
The transmission mechanism 6-0 can be a cam and the like, but the cam which can transmit the downward pressure of the stud 7-2 to drive the copper seat 5-7 to move is complex in structure, difficult to manufacture and install and high in cost. Most preferably, as shown in FIG. 5, the transmission mechanism 6-0 comprises a right side plate 6-1, a left side plate 6-2, a trigger 6-3 and a pressing block 6-5; the trigger 6-3 is movably connected between the right side plate 6-1 and the left side plate 6-2 through a rotating shaft 6-4; the trigger 6-3 comprises a front end and a rear end, and the front end and the rear end are respectively arranged at two sides of the rotating shaft 6-4 along the conveying direction of the wire rod; the pressing block 6-5 is arranged at the bottom end of the trigger 6-3 and is positioned between the front end and the rear end;
the rear end of the trigger 6-3 is connected with the stud 7-2, and the front end is connected with the copper seat 5-7;
and the pressing block 6-5 is vertically positioned above the steel column 5-10 and matched with the steel column 5-10.
The right side plate 6-1 and the left side plate 6-2 support the trigger 6-3, so that the trigger 6-3 can rotate around the rotating shaft. Along the wire rod conveying direction, the front end and the rear end of the trigger 6-3 are arranged on two sides of the rotating shaft, the rear end of the trigger is connected with the stud 7-2, and the front end of the trigger is connected with the copper seat 5-7, so that when the trigger 6-3 rotates around the rotating shaft, the copper seat 5-7 can be driven to move along the wire rod conveying direction, and the force for driving the trigger 6-3 to rotate comes from the stud 7-2.
And the pressing block 6-5 is vertically positioned above the tungsten steel column 5-10, when the trigger 6-3 is pressed down by the screw bolt 7-2, the pressing block 6-5 moves down to push one end of the bolt 5-9 connected with the first floating tooth 5-3, one end of the bolt 5-9 connected with the first floating tooth 5-3 is pressed down, the other end is upwarped, so that the first floating tooth 5-3 moves down, the second floating tooth 5-5 moves up, the front end of the wire rod is loosened, the rear end of the wire rod is clamped, and at the moment, when the trigger 6-3 rotates, the copper seat 5-7 is jacked back by a corresponding displacement to reach a rear working position. When the stud 7-2 moves upwards for resetting, the trigger 6-3 is driven to reset, the bolt 5-9 is reset along with the bolt, the first floating lifting tooth 5-3 moves upwards, the second floating lifting tooth 5-5 moves downwards, the front end of the wire rod is clamped under the push of the trigger 6-3, the copper seat 5-7 moves forwards by a corresponding displacement to reach a front working position, and the wire feeding work is completed.
The trigger 6-3 is used as the transmission mechanism 6-0, so that the structure is simple and the manufacture is easier. And it can realize transmitting a drive force to different parts along many branches, realizes the associative motion between different parts, more does benefit to and guarantees spot welder head overall structure's succinct nature and compactness.
In order to facilitate the wire to penetrate into the wire feeding mechanism before starting up, the transmission mechanism 6-0 further comprises two pressure rods 6-6, the two pressure rods 6-6 are respectively and movably arranged on the right side plate 6-1 and the left side plate 6-2 along the vertical direction, and a second reset spring 6-7 for driving the pressure rods 6-6 to reset is arranged between the pressure rods 6-6 and the right side plate 6-1 and the left side plate 6-2; the pressure lever 6-6 is vertically positioned above the transmission rod one 5-4, and the transmission rod one 5-4 is driven to vertically move through the pressure lever 6-6. And the first transmission rod 5-4 moves downwards along with the pressing of the pressing rod 6-6, so that the first lifting tooth 5-3 is pushed to move downwards to expose the wire channel.
Since the spot welding head is used for in-mold stamping and welding and needs to be matched with a stamping and welding machine for use, in order to be capable of adjusting and aligning the lower electrode 3-1 with a mold cavity of a mold, preferably, the mounting seat 4-0 comprises an adjusting base 4-1, an upper support 4-2 and a lower support 4-3; the lower support 4-3 is arranged on the adjusting base 4-1, and the upper support 4-2 is movably connected to the lower support 4-3 along the vertical direction; the upper electrode 1-1 is arranged on an upper fixing block 4-4, and the upper fixing block 4-4 is arranged on an upper bracket 4-2; the lower electrode 3-1 is arranged on a lower fixing block 4-5, and the lower fixing block 4-5 is arranged on a lower bracket 4-3; the upper support 4-2 is connected with a stud 7-2 of the power mechanism 7-0.
The stud 7-2 is pressed to move downwards to drive the upper bracket 4-2 to move downwards, so that the upper electrode 3-1 arranged on the upper bracket 4-2 is driven to move downwards; the stud 7-2 is reset, and the upper electrode 3-1 and the upper bracket 4-2 are reset along with the stud.
The spot welding machine head utilizing the in-mold punching welding has the following specific spot welding process:
1. and rotating the special jig, pressing a pressure rod 6-6 of the transmission mechanism 6-0, and continuously pressing a transmission rod 5-4 by the pressure rod 6-6 under stress. As the first transmission rod 5-4 is threaded into the first uplifting tooth 5-3 through the copper seat 5-7, the first uplifting tooth 5-3 can move downwards to expose the wire passage when the compression rod 6-6 presses the first transmission rod 5-4 downwards. Preparing a wire, and clamping the wire into the groove 1-2 of the upper electrode along the wire channel. And taking down the special jig, and enabling the first transmission rod 5-4 and the pressure rod 6-6 to be sequentially restored to the original positions under the restoring action of the second return spring 6-7, wherein the first transmission rod 5-4 drives the first floating tooth 5-3 to prop against the passing wire rod in the upward process so as to play a role in fixing the wire rod.
2. And adjusting the adjusting base 4-1, adjusting the position of a spot welding machine head to enable the lower electrode 3-1 and the die cavity of the die to be in the same horizontal direction, and locking the adjusting base 4-1.
3. The bolt 7-2 in the power mechanism 7-0 is provided with a downward pressing force through the punch, the process of downward movement of the bolt 7-2 drives the trigger 6-3 clamped in the bolt 7-2 to press downwards, and at the moment, the trigger 6-3 provides forces in two directions of retreating and vertically downwards: on one hand, a steel column 5-10 is pressed downwards through a pressing block 6-5 embedded in a groove part at the lower end of a trigger 6-3, the steel column 5-10 then presses a power bolt 5-9 downwards to drive a first floating tooth 5-3 connected with the power bolt 5-9 to move downwards, a wire is loosened, the other end of the power bolt 5-9 continuously pushes a second floating tooth 5-5 upwards, and the wire is fixed at the rear; on the other hand, the copper seat 5-7 is pushed forwards by a pulley at the front end of the trigger 6-3, so that the copper seat 5-7 moves backwards by a displacement.
4. The wire feeding mechanism 5-0 feeds the wire forward to just below the upper electrode 1-1. When the stud 7-2 moves downwards, the upper cutter 7-3 is driven by the rotating pin 7-4 to ascend together to cut off the wire clamped in the groove 1-2 of the upper electrode 1-1. When the stud 7-2 moves downwards, the upper support 4-2 is pressed downwards, so that the cut wire rod section is pressed by the upper electrode 1-1 to be contacted with the strip material. Because the wire section is contacted with the upper electrode 1-1 and the strip is contacted with the lower electrode 3-1, an electric arc is generated between the wire section and the strip after the power is on, so that the two parts are fused together.
According to practical production verification, the production process is simplified, the production efficiency is 3-5 times that of the conventional production process, the equipment is stable, the maintenance is simple, the cost is low, and the wire feeding requirements of different products can be met. The spot-welded product has very good binding force after testing.
Claims (9)
1. Spot welding head of punching weld in mould, its characterized in that: comprises a mounting seat (4-0), an upper electrode (1-1) and a lower electrode (3-1) which are arranged on the mounting seat (4-0), and a power mechanism (7-0) for transmitting stamping force;
the axis of the upper electrode (1-1) is arranged along the horizontal direction, and the axis of the lower electrode (3-1) is arranged along the vertical direction; the upper electrode (1-1) is positioned above the lower electrode (3-1), a welding space is formed between the upper electrode (1-1) and the lower electrode (3-1), and a groove (1-2) which is axially through along the upper electrode (1-1) and has an opening facing the lower electrode (3-1) is formed in the upper electrode (1-1); the power mechanism (7-0) is connected with the upper electrode (1-1) and drives the upper electrode (1-1) to move up and down linearly relative to the lower electrode (3-1);
the wire feeding mechanism (5-0) is provided with a wire passage for threading, and the wire passage is communicated with a groove (1-2) of an upper electrode (1-1) through the wire feeding mechanism (5-0);
the wire feeding mechanism (5-0) comprises a core body (5-1), an upper mounting groove (5-2) with an upward opening and a lower mounting groove (5-6) with a downward opening are formed in the core body (5-1), and the core body (5-1) is divided into a left section (5-1A) located on the left side of the upper mounting groove (5-2) and a right section (5-1B) located on the right side along the conveying direction of the wire rod by the upper mounting groove (5-2); the core body (5-1) is also provided with a wire channel which is communicated with the other end from one end, and the wire channel is communicated with the upper mounting groove (5-2) and the lower mounting groove (5-6);
a wire traction mechanism and a second floating tooth (5-5) are arranged in the extending direction of the wire channel, and the wire traction mechanism is positioned in front of the second floating tooth (5-5) along the conveying direction of the wire;
the wire traction mechanism comprises a first floating tooth (5-3) and a copper seat (5-7); the copper seat (5-7) is movably arranged in the upper mounting groove (5-2) along the conveying direction of the wire rod; a moving area is formed by the copper seat (5-7) and the upper mounting groove (5-2) in a surrounding mode, the first floating tooth (5-3) is located in the moving area and is movably connected with the copper seat (5-7) along the vertical direction, and a wire passing space communicated with the wire channel is formed between the first floating tooth (5-3) and the copper seat (5-7); the second floating tooth (5-5) is vertically and movably arranged in the lower mounting groove (5-6) and is positioned below the wire channel;
and a power bolt (5-9) for driving the first floating lifting tooth (5-3) and the second floating lifting tooth (5-5) to move along the vertical direction in a reverse direction is also arranged.
2. The in-mold die-bonding spot welder head according to claim 1, characterized in that: also comprises an upper cutter (7-3); the upper cutter (7-3) is arranged below the wire channel and is positioned between the upper electrode (1-1) and the wire feeding mechanism (5-0) along the wire conveying direction, the upper cutter (7-3) is connected with the power mechanism (7-0), and the upper cutter (7-3) is driven to reciprocate up and down by the power mechanism (7-0); and the upper cutter (7-3) and the upper electrode (1-1) move up and down in reverse direction under the drive of the power mechanism (7-0).
3. The in-mold die-bonding spot welder head according to claim 2, characterized in that: a bolt hole (5-1E) is formed in the core body (5-1), and the bolt hole (5-1E) penetrates through the right side section (5-1B) and the upper mounting groove (5-2) along the conveying direction of the wires and extends to the left side section (5-1A); the power bolt is characterized by comprising a power bolt (5-9), wherein the power bolt (5-9) is arranged in a bolt hole (5-1E), the middle part of the power bolt is hinged with a core body (5-1), one end of the power bolt is positioned below a first floating tooth (5-3) and matched with the first floating tooth (5-3), and the other end of the power bolt is positioned below a second floating tooth (5-5) and matched with the second floating tooth (5-5); and is provided with a driving structure for driving the power bolt (5-9) to move in a lever way; the driving structure comprises steel columns (5-10) and telescopic springs (5-13); a vertical column pin hole (5-1F) is formed in the left section (5-1A), a steel column (5-10) is movably mounted in the column pin hole (5-1F), and the steel column (5-10) is located above the power bolt (5-9) and matched with the power bolt (5-9); and along the vertical direction, the extension spring (5-13) is arranged between the second floating tooth (5-5) and the right side section (5-1B).
4. The in-mold die-bonding spot welder head according to claim 3, characterized in that: a first transmission rod (5-4) is arranged between the copper seat (5-7) and the first uplift tooth (5-3), one end of the first transmission rod (5-4) penetrates through the butterfly-shaped elastic sheet (5-8) and the copper seat (5-7) in sequence to be connected with the first uplift tooth (5-3) along the vertical direction, and the first transmission rod (5-4) is movably connected with the copper seat (5-7) along the axial direction of the first transmission rod.
5. The in-mold die-bonding spot welder head according to claim 4, characterized in that: the power mechanism (7-0) comprises a support (7-1), a stud (7-2), a stop block (7-6) and a rotating pin (7-4);
the stud (7-2) is arranged in the support (7-1) and is movably connected with the support (7-1) along the axial direction of the support (7-1), and a first return spring (7-5) is arranged between the bottom of the stud (7-2) and the support (7-1); the stop block (7-6) is arranged on the support (7-1) and is movably connected with the support (7-1) along the axial direction of the support (7-1); the rotating pin (7-4) is hinged to the support (7-1), one end of the rotating pin, which is positioned at the hinged point, is connected with the stop block (7-6), and the other end of the rotating pin, which is positioned at the hinged point, is connected with the stud (7-2);
the upper cutter (7-3) is connected with the stop block (7-6).
6. The in-mold die-bonding spot welder head according to claim 5, characterized in that: the copper seat (5-7) is connected with a stud (7-2) of the power mechanism (7-0) through a transmission mechanism (6-0);
the top end of the steel column (5-10) is matched with the stud (7-2) of the power mechanism (7-0) through a transmission mechanism (6-0).
7. The in-mold die-bonding spot welder head according to claim 6, characterized in that: the transmission mechanism (6-0) comprises a right side plate (6-1), a left side plate (6-2), a trigger (6-3) and a pressing block (6-5); the trigger (6-3) is movably connected between the right side plate (6-1) and the left side plate (6-2) through a rotating shaft (6-4); the trigger (6-3) comprises a front end and a rear end, and the front end and the rear end are respectively arranged at two sides of the rotating shaft (6-4) along the conveying direction of the wires; the pressing block (6-5) is arranged at the bottom end of the trigger (6-3) and is positioned between the front end and the rear end;
the rear end of the trigger (6-3) is connected with the stud (7-2), and the front end of the trigger is connected with the copper seat (5-7);
and the pressing block (6-5) is vertically positioned above the steel column (5-10) and matched with the steel column (5-10).
8. The in-mold die-bonding spot welder head according to claim 7, characterized in that: the transmission mechanism (6-0) further comprises two pressure rods (6-6), the two pressure rods (6-6) are respectively and movably arranged on the right side plate (6-1) and the left side plate (6-2) along the vertical direction, and a second reset spring (6-7) for driving the pressure rods (6-6) to reset is arranged between the pressure rods (6-6) and the right side plate (6-1) and the left side plate (6-2);
and the compression bar (6-6) is positioned above the transmission bar I (5-4) along the vertical direction, and the compression bar (6-6) drives the transmission bar I (5-4) to move vertically.
9. The in-mold die-bonding spot welder head according to any of claims 5 to 8, characterized in that: the mounting seat (4-0) comprises an adjusting base (4-1), an upper bracket (4-2) and a lower bracket (4-3); the lower support (4-3) is mounted on the adjusting base (4-1), and the upper support (4-2) is vertically movably connected to the lower support (4-3);
the upper electrode (1-1) is arranged on an upper fixing block (4-4), and the upper fixing block (4-4) is arranged on an upper bracket (4-2);
the lower electrode (3-1) is arranged on a lower fixing block (4-5), and the lower fixing block (4-5) is arranged on a lower bracket (4-3);
the upper bracket (4-2) is connected with a stud (7-2) of the power mechanism (7-0).
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| CN202010332806.6A CN111347142B (en) | 2020-04-24 | 2020-04-24 | Spot welding machine head for punching and welding in mould |
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| CN202010332806.6A CN111347142B (en) | 2020-04-24 | 2020-04-24 | Spot welding machine head for punching and welding in mould |
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| CN111347142B true CN111347142B (en) | 2021-10-26 |
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| CN207606521U (en) * | 2017-12-05 | 2018-07-13 | 温州宏丰电工合金股份有限公司 | Electrical contact rushes welding integrated device |
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| CN201151049Y (en) * | 2008-01-08 | 2008-11-19 | 东莞市中一合金科技有限公司 | Auto feed cutter and welder |
| EP2305413A1 (en) * | 2009-10-01 | 2011-04-06 | Otto Bihler Handels-Beteiligungs-GmbH | Welding device with exchangeable electrode head |
| CN102107321A (en) * | 2009-12-24 | 2011-06-29 | 东莞市中一合金科技有限公司 | Mechanism for integrating cutting, feeding and welding of contoured strips |
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