Spot welding device for automobile part production

Abstract

The invention discloses a spot welding device for automobile part production, relates to the technical field of automobile part resistance spot welding, and aims at solving the technical problem that a traditional spot welding device is not functional. A servo control motor for driving is arranged at the middle end of the central connecting shaft bracket; and a three-way shaft is rotationally arranged in the center connecting shaft bracket through a bearing. According to the spot welding device for automobile part production, on the basis of the arrangement of the opposite transmission structure and the planetary transmission structure, the movable connecting arms conduct relative movement, after adjustment, the movable connecting arms synchronously rotate or the sliding adjusting arms conduct relative sliding movement, and through the arrangement, the spot welding device for automobile part production has two different use modes; therefore, the use mode of a conventional C-shaped clamp spot welding device and the use mode of an X-shaped clamp spot welding device are simulated, the functionality of the spot welding device is improved relative to that of a conventional spot welding device for automobile part production, diversified use operation is further increased, and use of different automobile parts is met.

Description

Technical Field

[0001] The invention relates to the technical field of resistance spot welding of automobile parts, and more specifically to a spot welding device for producing automobile parts. Background Art

[0002] In the field of automobile manufacturing, resistance spot welding is the core process for connecting metal parts such as car bodies and chassis. It uses electrode pressure to make the workpieces fit together, and uses the Joule heat generated by contact resistance to achieve local melting to form a weld nugget. C-type welding tongs are suitable for linear pressure welding and are used on vertical / near vertical surfaces (such as the side of the car body); X-type welding tongs are suitable for rotary pressure welding and are used on horizontal / near horizontal surfaces (such as the roof and floor).

[0003] The existing C-type welding clamp or X-type welding clamp single spot welding device has a single function. In the process of welding automobile parts, different spot welding devices need to be used for processing. The welding method is single and cannot meet the needs of low-cost and diversified processing operations. In view of this, we propose a spot welding device for automobile parts production. Summary of the invention

[0004] The purpose of the present invention is to provide a spot welding device for automobile parts production to solve the technical problem of insufficient functionality of traditional spot welding devices.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a spot welding device for automobile parts production, comprising a central connecting shaft frame; a servo-controlled motor for driving is arranged at the middle end of the central connecting shaft frame; and a three-way shaft is rotatably arranged inside the central connecting shaft frame through a bearing; wherein the three-way shaft is provided with a planetary counter-transmission system; and the planetary counter-transmission system comprises a power output gear arranged at the middle end of the three-way shaft and a double power output adjustment mechanism arranged symmetrically on both sides of the three-way shaft; movable connecting arms are hingedly arranged at both ends of the central connecting shaft frame; and the movable The connecting arm is transmission-connected with the dual power output adjusting mechanism; and a sliding adjusting arm is slidingly arranged inside the movable connecting arm; wherein, one of the output ends of the dual power output adjusting mechanism is meshingly connected with the movable connecting arm; and, the other output end of the dual power output adjusting mechanism is meshingly connected with the sliding adjusting arm; and, the two dual power output adjusting mechanisms constitute a counter-transmission structure through a power output gear and a three-way shaft; wherein, the dual power output adjusting mechanism is a planetary transmission structure; wherein, the planetary transmission structure has a revolving centered clamping welding state and a center horizontal welding state.

[0006] Based on the settings of the counter-direction transmission structure and the planetary transmission structure, the present invention causes the movable connecting arm to perform relative motion, and after adjustment, the movable connecting arm rotates synchronously or the sliding adjustment arm performs relative sliding motion. Through this setting, the spot welding device for automobile parts production has two different usage modes, so as to simulate the usage modes of the conventional C-shaped clamp spot welding device and the X-shaped clamp spot welding device, thereby improving the functionality compared with the conventional spot welding device for automobile parts production, further increasing the diversified usage operations, and meeting the usage requirements of different automobile parts.

[0007] Preferably, the dual-power output adjustment mechanism includes sun gear seats rotatably arranged at both ends of the three-way shaft; wherein, the two sun gear seats are in counter-direction meshing transmission connection with the power output gear; wherein, internal tooth blocks are arranged on the inner walls of the sun gear seats; and, a planetary connection gear seat is rotatably arranged at the center of the circle inside the sun gear seat; and, a number of planetary gears are annularly and equidistantly connected inside the planetary connection gear seat; and, a secondary transmission bevel gear is fixedly arranged at the opening end of the planetary connection gear seat relative to the sun gear seat; wherein, a central output gear wheel meshing with the planetary gears is arranged inside the planetary connection gear seat.

[0008] Preferably, the dual-power output adjustment mechanism further includes a primary transmission shaft fixed to the central output gear wheel; one side of the primary transmission shaft is connected to a secondary transmission shaft through a universal joint; and, a sliding drive gear is arranged on the secondary transmission shaft.

[0009] Preferably, the movable connecting arm includes a welding arm base; the two welding arm bases are symmetrically hinged to the central connection shaft frame; and, the central connection shaft frame is provided with a limiting chute for the sliding adjustment of the sliding adjustment arm; wherein, the two welding arm bases have a length difference; and, a transmission shaft locking device is arranged on the surface of the welding arm base opposite to the end of the secondary transmission shaft; and, the secondary transmission shaft is detachably and firmly connected to the transmission shaft locking device; a synchronous output bevel gear is arranged at one of the connecting ends of the welding arm base and the central connection shaft frame; and, the welding arm base is fixedly connected to the synchronous output bevel gear, and, a limiting groove A is arranged at the connecting end of the welding arm base opposite to the synchronous output bevel gear; wherein, a limiting groove B adapted to the limiting groove A is arranged on the surface of the central connection shaft frame; and, the central connection shaft frame is detachably and limitedly connected to the welding arm base through the limiting groove B, the limiting groove A, and a positioning pin.

[0010] Preferably, the sliding adjustment arm includes a connecting slider slidably arranged in the limiting chute, and, a driving rack meshing with the sliding drive gear is fixedly arranged on the connecting slider; wherein, the two connecting sliders are adapted to the length difference between the two welding arm bases.

[0011] Preferably, an L-shaped connecting frame A is fixedly arranged at the end of the connecting slider with a relatively short relative length dimension; an electrode mounting seat is fixedly arranged at one end of the connecting frame A relatively far away from the servo control motor; and, an electrode connection assembly is arranged inside the electrode mounting seat; wherein, a connecting frame B is fixedly arranged at the end of the connecting slider with a relatively long relative length dimension; an electrode mounting seat is fixedly arranged at one end of the connecting frame B relatively far away from the servo control motor; an electrode connection assembly is arranged inside the electrode mounting seat; wherein, the welding ends of the two electrode connection assemblies are distributed relatively to each other.

[0012] Preferably, the electrode connection assembly includes a connecting shaft fixed inside the electrode mounting seat; a fastening block is arranged at the end of the connecting shaft through a bolt; an axial diameter clamping cavity is formed by the internal gap between the connecting shaft and the fastening block; an electrode shaft member is arranged inside the axial diameter clamping cavity, and the shaft body of the electrode shaft member is frustum-shaped; wherein, the electrode shaft member and the connecting shaft are arranged coaxially or crosswise.

[0013] A method for using a spot welding device for automobile part production includes the following steps: S100. Installation processing: Install the spot welding device for automobile part production with a robot arm or a manual pneumatic suspension device through tools. S200. Primary adjustment processing: S201. If the primary adjustment processing for C-shaped clamp spot welding operation is carried out: Rotationally limit the synchronous output bevel gear and the movable connecting arm as a whole by inserting the positioning pin into the limiting groove B and the limiting groove A; at the same time, adjust the transmission shaft lock to release the rotational constraint on the secondary transmission shaft. S202. If the primary adjustment processing for X-shaped clamp spot welding operation is carried out: Adjust the transmission shaft lock to impose a rotational constraint on the secondary transmission shaft; release the rotational limit on the synchronous output bevel gear and the movable connecting arm as a whole by separating the positioning pin from the limiting groove B and the limiting groove A. S300. Secondary adjustment processing: S301. If the secondary adjustment processing for C-shaped clamp spot welding operation is carried out: Coaxially adjust and install the electrode shaft member at the position of one relatively short movable connecting arm; crosswise adjust and install the electrode shaft member at the position of the other relatively long movable connecting arm. S302. If the secondary adjustment processing for X-shaped clamp spot welding operation is carried out: Crosswise adjust and install the electrode shaft member at the position of one relatively short movable connecting arm; coaxially adjust and install the electrode shaft member at the position of the other relatively long movable connecting arm. S400. Resistance spot welding processing: S401. If C-shaped clamp resistance spot welding is to be performed: The power output of the servo-controlled motor causes the power output gear to output power to the two sun gear seats; based on the locking and limiting of the synchronous output bevel gear, the planetary connecting gear seat stops revolving, and several central output gears rotate to drive the planetary gears to rotate. The planetary gears drive the first-level transmission shaft, the universal joint, the second-level transmission shaft, and the sliding drive gear to rotate and drive the drive rack, causing the connecting slider arranged in the limit chute to drive the connecting shaft and the electrode shaft part to slide towards each other to perform resistance spot welding on a vertical or nearly vertical surface. S402. If X-shaped clamp resistance spot welding is to be performed: The power output of the servo-controlled motor causes the power output gear to output power to the two sun gear seats. Based on adjusting the transmission shaft lock to restrict the rotation of the second-level transmission shaft, the second-level transmission bevel gear and the planetary connecting gear seat rotate to drive the synchronous output bevel gear fixedly connected to the movable connecting arm to rotate, so as to perform resistance spot welding on a horizontal or nearly horizontal surface.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Based on the setting of the counter-direction transmission structure and the planetary transmission structure, the present invention causes the movable connecting arm to perform relative movement, and after adjustment, the movable connecting arm rotates synchronously or the sliding adjustment arm performs relative sliding movement. Through this setting, the spot welding device for automobile parts production has two different usage modes, thus simulating the usage modes of conventional C-shaped clamp spot welding devices and X-shaped clamp spot welding devices, thereby improving the functionality compared with conventional spot welding devices for automobile parts production, further increasing diverse usage operations, and meeting the usage requirements of different automobile parts.

[0015] 2. Based on the setting of the counter-direction transmission and the planetary structure, while satisfying the counter-direction transmission operation, the present invention causes the central output gears and the second-level transmission bevel gears to be used as two sets of power outputs to drive the movable connecting arm and the sliding adjustment arm to move respectively, realizing the power output of two different movements.

[0016] 3. Through the setting of the universal joint, the present invention causes the first-level transmission shaft and the second-level transmission shaft to have corner power output or restricts the rotation operation of the first-level transmission shaft, effectively avoiding movement interference during different movement processes.

[0017] 4. In the present invention, the transmission shaft lock can be used to restrict the rotation of the second-level transmission shaft. Cooperating with the separation of the positioning pin from the limit groove B and the limit groove A, only the planetary connecting gear seat performs power output, enabling one of the required movement power outputs of the synchronous output bevel gear. And through the insertion of the positioning pin into the limit groove B and the limit groove A, cooperating with the release of the restriction on the rotation of the second-level transmission shaft by the transmission shaft lock to form another required movement power output; through this method, the required precise state switching is achieved.

[0018] 5. By adapting the lengths of the two connecting sliders to the two welding arm bases, a spot resistance welding motion of relative opposite sliding movement in the C-shaped clamp spot welding device is formed. At the same time, Figure 2 as shown, and the lengths of the two connecting sliders are adapted to the two welding arm bases. This meets the requirements of another operation mode of the C-shaped clamp spot welding device without interfering with the conventional rotary welding process of the X-shaped clamp spot welding device.

[0019] 6. Based on the setting of the shaft diameter clamping cavity in the present invention, the electrode shaft parts can be respectively adjusted to be coaxially arranged or cross-arranged. In this way, the required adjustment of the orientation of the electrode shaft parts is achieved. Through this setting, the required adjustment of the orientation of the electrode shaft parts in the X-shaped clamp spot welding device and the C-shaped clamp spot welding device is realized, and the switching operation of the usage mode is satisfied through this setting. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall three-dimensional structure of one operating state of the present invention; Figure 2 is a schematic diagram of the overall three-dimensional structure of another operating state of the present invention; Figure 3 is a schematic diagram of the overall disassembled three-dimensional structure of the present invention; Figure 4 is a schematic diagram of the three-dimensional disassembly structure of the movable connecting arm and the sliding adjustment arm of the present invention; Figure 5 is a schematic diagram of the three-dimensional disassembly structure of the dual-power output adjustment mechanism of the present invention; Figure 6 is of the present invention Figure 1 is a schematic diagram of the partial enlarged structure at A in the present invention; Figure 7 is a schematic diagram of the sectional three-dimensional structure of the connecting shaft, fastening block and electrode shaft part of the present invention.

[0021] Explanation of the reference numerals in the drawings: 1. Central connecting shaft frame; 2. Servo control motor; 3. Three-way shaft; 4. Planetary counter-directional transmission system; 5. Power output gear; 6. Dual-power output adjustment mechanism; 7. Movable connecting arm; 8. Sliding adjustment arm; 101. Limit groove B; 601. Sun gear seat; 6011. Inner gear block; 602. Planetary connecting gear seat; 6021. Secondary transmission bevel gear; 603. Planetary gear; 604. Central output gear wheel; 605. Primary transmission shaft; 606. Universal joint; 607. Secondary transmission shaft; 608. Sliding drive gear; 701. Welding arm base; 7011. Limit sliding groove; 7012. Limit groove A; 702. Drive shaft lock; 703. Synchronous output bevel gear; 801. Connecting slider; 802. Driving rack; 803. Connecting frame A; 804. Connecting frame B; 901. Connecting shaft; 902. Fastening block; 903. Electrode shaft part. Detailed implementation mode

[0022] As Figures 1 to 7 shown, a spot welding device for automobile parts production according to the present invention includes a central connecting shaft frame 1; a servo control motor 2 for driving is arranged in the middle of the central connecting shaft frame 1; moreover, a three-way shaft 3 is rotatably arranged inside the central connecting shaft frame 1 through bearings; wherein, a planetary opposed transmission system 4 is arranged on the three-way shaft 3; moreover, the planetary opposed transmission system 4 includes a power output gear 5 arranged in the middle of the three-way shaft 3 and a double power output adjustment mechanism 6 arranged symmetrically about the center on both sides of the three-way shaft 3; both ends of the central connecting shaft frame 1 are hinged with movable connecting arms 7; moreover, the movable connecting arms 7 are in transmission connection with the double power output adjustment mechanism 6; moreover, a sliding adjustment arm 8 is slidably arranged inside the movable connecting arms 7; wherein, one output end of the double power output adjustment mechanism 6 is meshed and connected with the movable connecting arm 7; moreover, the other output end of the double power output adjustment mechanism 6 is meshed and connected with the sliding adjustment arm 8; moreover, the two double power output adjustment mechanisms 6 form an opposed transmission structure through the power output gear 5 and the three-way shaft 3; wherein, the double power output adjustment mechanism 6 is a planetary transmission structure; wherein, the planetary transmission structure has a revolution type centered clamping welding state and a center horizontal welding state. Based on the opposed transmission structure and the planetary transmission structure, the present invention causes the movable connecting arms 7 to perform relative movements, and after adjustment, the movable connecting arms 7 rotate synchronously or the sliding adjustment arm 8 performs relative sliding movements. Through this setting, the spot welding device for automobile parts production has two different usage modes, thereby simulating the usage modes of a conventional C-shaped clamp spot welding device and an X-shaped clamp spot welding device, thereby improving the functionality compared with a conventional spot welding device for automobile parts production, further increasing diversified usage operations, and meeting the usage of different automobile parts.

[0023] In an embodiment of the present invention, the dual power output adjustment mechanism 6 includes sun gear seats 601 rotatably arranged at both ends of the three-way shaft 3; wherein, the two sun gear seats 601 are in meshing transmission connection with the power output gear 5 in an opposite direction; wherein, internal teeth 6011 are provided on the inner wall of the sun gear seat 601; and, a planetary connection gear seat 602 is rotatably arranged at the center of the sun gear seat 601; and, a plurality of planetary gears 603 are arranged at equal intervals in a ring inside the planetary connection gear seat 602; and, a secondary transmission bevel gear 6021 is fixedly arranged at the opening end of the planetary connection gear seat 602 opposite to the sun gear seat 601; wherein, a central output gear wheel 604 meshingly connected with the planetary gears 603 is provided inside the planetary connection gear seat 602. Based on the opposite-direction transmission and the planetary structure, the present invention enables the central output gear wheel 604 and the secondary transmission bevel gear 6021 to be used as two sets of power outputs to drive the movable connection arm 7 and the sliding adjustment arm 8 to move respectively while satisfying the opposite-direction transmission operation, realizing the power output of two different movements.

[0024] In an embodiment of the present invention, the dual power output adjustment mechanism 6 further includes a primary transmission shaft 605 fixed to the central output gear wheel 604; one side of the primary transmission shaft 605 is connected to a secondary transmission shaft 607 through a universal joint 606; and, a sliding drive gear 608 is provided on the secondary transmission shaft 607. Through the setting of the universal joint 606, the present invention enables the primary transmission shaft 605 and the secondary transmission shaft 607 to have angular power output or to limit the rotation operation of the primary transmission shaft 605, effectively avoiding movement interference during different movement processes.

[0025] In an embodiment of the present invention, the movable connecting arm 7 includes a welding arm base 701; two welding arm bases 701 are symmetrically hinged to the central connecting shaft frame 1; and, the central connecting shaft frame 1 is provided with a limiting chute 7011 for the sliding adjustment of the sliding adjustment arm 8; wherein, the two welding arm bases 701 have a length difference; and, a transmission shaft locking device 702 is arranged on the surface of the welding arm base 701 opposite to the end of the secondary transmission shaft 607; and, a detachable fastening connection is provided between the secondary transmission shaft 607 and the transmission shaft locking device 702; a synchronous output bevel gear 703 is arranged at one of the connecting ends of the welding arm base 701 and the central connecting shaft frame 1; and, a fixed connection is provided between the welding arm base 701 and the synchronous output bevel gear 703, and, a limiting groove A7012 is arranged at the connecting end of the welding arm base 701 opposite to the synchronous output bevel gear 703; wherein, a limiting groove B101 adapted to the limiting groove A7012 is arranged on the surface of the central connecting shaft frame 1; and, the central connecting shaft frame 1 is detachably and limit-connected to the welding arm base 701 through the limiting groove B101, the limiting groove A7012 and a positioning pin. In the present invention, the transmission shaft locking device 702 can be used to impose a transmission constraint on the rotation of the secondary transmission shaft 607. When the positioning pin is separated from the limiting groove B101 and the limiting groove A7012, only the planetary connecting tooth seat 602 outputs power, enabling one of the required motion power outputs of the synchronous output bevel gear 703. When the positioning pin is inserted into the limiting groove B101 and the limiting groove A7012, and the transmission shaft locking device 702 releases the rotation constraint on the secondary transmission shaft 607, another required motion power output is formed; through this method, the required precise state switching is achieved.

[0026] In an embodiment of the present invention, the sliding adjustment arm 8 includes a connecting slider 801 slidably arranged in the limiting chute 7011, and, a driving rack 802 meshingly connected with the sliding driving gear 608 is fixedly arranged on the connecting slider 801; wherein, the two connecting sliders 801 are adapted to the length difference between the two welding arm bases 701. As shown in the present invention Figure 1 The two connecting sliders 801 shown are adapted to the length difference between the two welding arm bases 701, forming a spot resistance welding motion of relative opposite sliding movement in the C-shaped clamp spot welding device, and at the same time Figure 2 As shown and the two connecting sliders 801 are arranged to be adapted to the length difference between the two welding arm bases 701, meeting the requirements of another operation mode of the C-shaped clamp spot welding device without interfering with the conventional rotary welding process of the X-shaped clamp spot welding device.

[0027] In an embodiment of the present invention, at the end of the connecting slider 801 with a relatively short length dimension, an L-shaped connecting frame A803 is fixedly arranged; at one end of the connecting frame A803 relatively far from the servo control motor 2, an electrode mounting seat is fixedly arranged; and, an electrode connection assembly is arranged inside the electrode mounting seat; wherein, at the end of the connecting slider 801 with a relatively long length dimension, a connecting frame B804 is fixedly arranged; at one end of the connecting frame B804 relatively far from the servo control motor 2, an electrode mounting seat is fixedly arranged; an electrode connection assembly is arranged inside the electrode mounting seat; wherein, the spot welding ends of the two electrode connection assemblies are distributed oppositely.

[0028] In an embodiment of the present invention, the electrode connection assembly includes a connecting shaft 901 fixed inside the electrode mounting seat; at the end of the connecting shaft 901, a fastening block 902 is arranged through a bolt; a shaft diameter clamping cavity is formed by the internal gap between the connecting shaft 901 and the fastening block 902; an electrode shaft member 903 is arranged inside the shaft diameter clamping cavity, and the shaft body of the electrode shaft member 903 is frustum-shaped; wherein, the electrode shaft member 903 and the connecting shaft 901 are arranged coaxially or crosswise, wherein, the electrode shaft member 903 is made of chromium zirconium copper, an electrode cap is detachably installed at the head, an axial cooling hole with a diameter of 2 mm is drilled inside, and a quick cooling water joint is externally connected, and, a cooling channel is arranged inside the electrode shaft member 903 and is connected to an external circulation system through the cooling hole. In the present invention, based on the setting of the shaft diameter clamping cavity, the electrode shaft member 903 can be respectively adjusted to be coaxially arranged or crosswise arranged, and the required orientation adjustment of the electrode shaft member 903 is realized in this way, and the required orientation adjustment of the electrode shaft member 903 in the X-shaped clamp spot welding device and the C-shaped clamp spot welding device is realized through this setting, and the switching operation of the use mode is satisfied through this setting.

[0029] In an embodiment of the present invention, the synchronous output bevel gear 703 and the movable connecting arm 7 as a whole are rotationally limited by inserting the positioning pin into the limiting groove B101 and the limiting groove A7012; at the same time, the rotation constraint of the secondary transmission shaft 607 is released by adjusting the transmission shaft lock 702 to form a central horizontal welding state.

[0030] In an embodiment of the present invention, the transmission shaft lock 702 is adjusted to rotate and constrain the secondary transmission shaft 607; the rotation limit of the synchronous output bevel gear 703 and the movable connecting arm 7 as a whole is released by separating the positioning pin from the limiting groove B101 and the limiting groove A7012 to form a revolution-type centered clamping welding state.

[0031] Working principle: This embodiment provides a spot welding device for automobile part production, and the using steps are as follows: S100. Installation processing: Install the spot welding device for automobile part production on a robotic arm or a manual pneumatic suspension device through tools; S200. Primary adjustment processing: S201. If performing the primary adjustment process for C-shaped clamp spot welding: Rotationally limit the synchronous output bevel gear 703 and the entire movable connecting arm 7 by inserting the positioning pin into the limiting groove B101 and the limiting groove A7012; at the same time, adjust the drive shaft lock 702 to release the rotational constraint on the secondary drive shaft 607. S202. If performing the primary adjustment process for X-shaped clamp spot welding: Adjust the rotational constraint on the secondary drive shaft 607 by means of the drive shaft lock 702; release the rotational limit on the synchronous output bevel gear 703 and the entire movable connecting arm 7 by separating the positioning pin from the limiting groove B101 and the limiting groove A7012. S300. Secondary adjustment process: S301. If performing the secondary adjustment process for C-shaped clamp spot welding: Coaxially adjust and install the electrode shaft part 903 at the position of one relatively short movable connecting arm 7; cross-adjust and install the electrode shaft part 903 at the position of the other relatively long movable connecting arm 7. S302. If performing the secondary adjustment process for X-shaped clamp spot welding: Cross-adjust and install the electrode shaft part 903 at the position of one relatively short movable connecting arm 7; coaxially adjust and install the electrode shaft part 903 at the position of the other relatively long movable connecting arm 7. S400. Resistance spot welding process: S401. If performing C-shaped clamp resistance spot welding: Cause the power output gear 5 to output power to the two sun gear seats 601 through the power output of the servo control motor 2; based on the locking limit of the synchronous output bevel gear 703, cause the planetary connecting gear seat 602 to stop revolving, and rotate the several central output gear wheels 604 to drive the planetary gear 603 to rotate. Drive the primary drive shaft 605, the universal joint 606, the secondary drive shaft 607, and the sliding drive gear 608 to rotate and drive the drive rack 802, causing the connecting slider 801 arranged in the limiting sliding groove 7011 to drive the connecting shaft 901 and the electrode shaft part 903 to slide towards each other to perform resistance spot welding on a vertical or nearly vertical surface (such as the vehicle body side panel). S402. If performing X-shaped clamp resistance spot welding: Cause the power output gear 5 to output power to the two sun gear seats 601 through the power output of the servo control motor 2, and based on the drive shaft lock 702, constrain the rotation of the secondary drive shaft 607, causing the secondary drive bevel gear 6021 and the planetary connecting gear seat 602 to rotate, driving the synchronous output bevel gear 703 fixedly connected to the movable connecting arm 7 to rotate, and performing resistance spot welding on a horizontal or nearly horizontal surface (such as the vehicle roof, floor).

[0032] The embodiments disclosed in the present invention are preferred embodiments, but not limited thereto. Those of ordinary skill in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not depart from the spirit of the present invention, they are within the protection scope of the present invention.

Claims

1. A spot welding device for automobile part production, characterized in that, It includes a central connecting shaft bracket (1); a servo control motor (2) for driving is arranged in the middle of the central connecting shaft bracket (1); Moreover, a three-way shaft (3) is rotatably arranged inside the central connecting shaft bracket (1) through bearings; Among them, the three-way shaft (3) is provided with a planetary opposed transmission system (4); moreover, the planetary opposed transmission system (4) includes a power output gear (5) arranged in the middle of the three-way shaft (3) and a double power output adjustment mechanism (6) arranged symmetrically on both sides of the three-way shaft (3); Both ends of the central connecting shaft bracket (1) are hinged with movable connecting arms (7); moreover, the movable connecting arms (7) are in transmission connection with the double power output adjustment mechanism (6); moreover, a sliding adjustment arm (8) is slidably arranged inside the movable connecting arms (7); Among them, one output end of the double power output adjustment mechanism (6) is meshed and connected with the movable connecting arm (7); Moreover, the other output end of the double power output adjustment mechanism (6) is meshed and connected with the sliding adjustment arm (8); Moreover, the two double power output adjustment mechanisms (6) form an opposed transmission structure through the power output gear (5) and the three-way shaft (3); Among them, the double power output adjustment mechanism (6) is a planetary transmission structure; Among them, the planetary transmission structure has a revolving centered clamping welding state and a central horizontal welding state.

2. The spot welding device for automobile parts production according to claim 1, characterized in that, The double power output adjustment mechanism (6) includes sun gear seats (601) rotatably arranged at both ends of the three-way shaft (3); among them, the two sun gear seats (601) are in opposed meshing transmission connection with the power output gear (5); Among them, internal tooth blocks (6011) are arranged on the inner wall of the sun gear seat (601); Moreover, a planetary connecting tooth seat (602) is rotatably arranged at the center of the circle inside the sun gear seat (601); Moreover, a number of planetary gears (603) are arranged in a circular equidistant connection inside the planetary connecting tooth seat (602); Moreover, a secondary transmission bevel gear (6021) is fixedly arranged at the opening end of the planetary connecting tooth seat (602) opposite to the sun gear seat (601); Among them, a central output gear wheel (604) meshed with the planetary gear (603) is arranged inside the planetary connecting tooth seat (602).

3. The spot welding device for automobile part production according to claim 2, characterized in that, The double power output adjustment mechanism (6) further includes a primary transmission shaft (605) fixed to the central output gear wheel (604); one side of the primary transmission shaft (605) is connected with a secondary transmission shaft (607) through a universal joint (606); moreover, a sliding drive gear (608) is arranged on the secondary transmission shaft (607).

4. The spot welding device for automotive parts production according to claim 3, wherein, The movable connecting arm (7) includes a welding arm base (701); the two welding arm bases (701) are symmetrically hinged to the central connecting shaft bracket (1); moreover, the central connecting shaft bracket (1) is provided with a limit sliding groove (7011) for the sliding adjustment of the sliding adjustment arm (8); Among them, the two welding arm bases (701) have a length difference; Furthermore, a transmission shaft locker (702) is provided on the surface of the welding arm base (701) opposite to the end of the secondary transmission shaft (607); and the secondary transmission shaft (607) and the transmission shaft locker (702) are detachably fastened together; A synchronous output bevel gear (703) is provided at one of the intersection ends of the welding arm base (701) and the central connecting shaft frame (1); Furthermore, the welding arm base (701) is fixedly connected to the synchronous output bevel gear (703), and a limiting groove A (7012) is provided at the intersection end of the welding arm base (701) relative to the synchronous output bevel gear (703); Wherein, a limiting groove B (101) adapted to the limiting groove A (7012) is provided on the surface of the central connecting shaft frame (1); Furthermore, the central connecting shaft frame (1) is detachably connected to the welding arm base (701) via the limiting groove B (101), the limiting groove A (7012) and the positioning pin.

5. The spot welding device for automobile parts production according to claim 4, characterized in that, The sliding adjustment arm (8) comprises a connecting slider (801) slidably arranged in the limiting sliding groove (7011), and a driving rack (802) meshingly connected to the sliding driving gear (608) is fixedly arranged on the connecting slider (801); The two connecting slide blocks (801) and the two welding arm bases (701) are adapted to each other in length.

6. The spot welding device for automobile part production according to claim 5, characterized in that, An L-shaped connecting frame A (803) is fixedly provided at the end of the connecting slider (801) with a relatively short length; an electrode mounting seat is fixedly provided at one end of the connecting frame A (803) relatively far from the servo control motor (2); and an electrode connection assembly is provided in the electrode mounting seat; A connecting frame B (804) is fixedly provided at the end of the connecting slider (801) with a relatively long length; an electrode mounting seat is fixedly provided at one end of the connecting frame B (804) relatively far from the servo control motor (2); and an electrode connection assembly is provided in the electrode mounting seat; Wherein, the spot welding ends of the two electrode connection components are relatively distributed.

7. A spot welding device for automotive part production according to claim 6, characterized in that, The electrode connection assembly comprises a connecting shaft (901) fixed in the electrode mounting seat; a fastening block (902) is provided at the end of the connecting shaft (901) by means of bolts; an internal gap between the connecting shaft (901) and the fastening block (902) forms an axial diameter clamping cavity; an electrode shaft member (903) is provided in the axial diameter clamping cavity, and the shaft body of the electrode shaft member (903) is truncated cone-shaped; wherein the electrode shaft member (903) and the connecting shaft (901) are coaxially arranged or cross-arranged; and the electrode shaft member (903) has a built-in cooling channel connected to an external circulation system.

8. A method for using a spot welding device for manufacturing automotive parts according to any one of claims 1-7, characterized in that, The following steps are involved: S100, installation process: installing the spot welding device for automobile parts production with a robot arm or an artificial pneumatic suspension device by using tools; S200, first level adjustment processing: S201. If performing the primary adjustment process for C-shaped clamp spot welding: The synchronous output bevel gear (703) and the movable connecting arm (7) are rotationally limited by inserting the positioning pin into the limiting groove B (101) and the limiting groove A (7012); at the same time, the rotation constraint on the secondary transmission shaft (607) is released by adjusting the transmission shaft lock (702). S202. If performing the primary adjustment process for X-shaped clamp spot welding: The rotation constraint on the secondary transmission shaft (607) is adjusted by the transmission shaft lock (702); the rotational limit of the synchronous output bevel gear (703) and the movable connecting arm (7) is released by separating the positioning pin from the limiting groove B (101) and the limiting groove A (7012). S300. Secondary adjustment process: S301. If performing the secondary adjustment process for C-shaped clamp spot welding: The electrode shaft part (903) at the position of one relatively short movable connecting arm (7) is coaxially adjusted and installed; the electrode shaft part (903) at the position of the other relatively long movable connecting arm (7) is cross-adjusted and installed. S302. If performing the secondary adjustment process for X-shaped clamp spot welding: The electrode shaft part (903) at the position of one relatively short movable connecting arm (7) is cross-adjusted and installed; the electrode shaft part (903) at the position of the other relatively long movable connecting arm (7) is coaxially adjusted and installed. S400. Resistance spot welding process: S401. If performing C-shaped clamp resistance spot welding: The power output of the servo control motor (2) causes the power output gear (5) to output power to the two sun gear seats (601); based on the locking limit of the synchronous output bevel gear (703), the planetary connecting gear seat (602) stops revolving, and several central output gears (604) rotate to drive the planetary gear (603) to rotate. The planetary gear (603) drives the primary transmission shaft (605), the universal joint (606), the secondary transmission shaft (607), and the sliding drive gear (608) to rotate and drive the drive rack (802), causing the connecting slider (801) arranged in the limiting chute (7011) to drive the connecting shaft (901) and the electrode shaft part (903) to slide towards each other to perform resistance spot welding on the vertical or nearly vertical surface (such as the vehicle body side panel). S402. If performing X-shaped clamp resistance spot welding: The power output of the servo control motor (2) causes the power output gear (5) to output power to the two sun gear seats (601), and the rotation of the secondary transmission shaft (607) is restricted based on the adjustment of the transmission shaft lock (702), causing the secondary transmission bevel gear (6021) and the planetary connecting gear seat (602) to rotate, driving the synchronous output bevel gear (703) fixedly connected to the movable connecting arm (7) to rotate, and performing resistance spot welding on the horizontal or nearly horizontal surface (such as the vehicle roof and floor).

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