Opening and closing mechanism of ceramic ring clamp for stud welding machine and stud welding machine comprising opening and closing mechanism

Abstract

The utility model relates to the technical field of stud welding, in particular to an opening and closing mechanism of a ceramic ring clamp for a stud welding machine and the stud welding machine. The opening and closing mechanism of the ceramic ring clamp comprises a driving piece capable of moving up and down and a clamping piece capable of being opened and closed left and right, the clamping piece comprises two clamping rods which are arranged in parallel, supporting points capable of enabling the clamping rods to rotate are arranged in the middles of the two clamping rods respectively, and elastic reset pieces are further arranged on the clamping rods. The driving piece is provided with a first inclined face and a second inclined face which can enable the upper ends of the two clamping rods to move oppositely and gradually incline inwards from bottom to top, and a stroke space for containing the upper ends of the clamping rods is formed between the first inclined face and the second inclined face. The structure is applied to the stud welding machine, the opening and closing movement of the ceramic ring clamp and the lifting movement of the welding gun are combined, the welding stud and ceramic ring positioning mode is achieved, the structure is ingenious and simple, and stability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of stud welding, in particular to an opening and closing mechanism of a ceramic ring clamp for a stud welding machine and a stud welding machine. Background Art

[0002] Stud welding is a method of contacting one end of the stud with the surface of a plate or pipe, energizing an arc, and after the contact surface melts, applying a certain pressure to the stud to complete the welding. The ceramic ring is a ring-shaped ceramic molten pool used to protect the molten metal from leaking out after the discharge and melt of the welding nail and the base material. Positioning the ceramic ring to the end of the welding nail is a necessary step in stud welding. There are some stud welding machines that have mechanisms for positioning the welding nail and the ceramic ring welding position, and can use a motor to drive the ceramic ring clamp to open to achieve positioning. However, the existing positioning mechanisms all independently control the ceramic ring clamp and the welding nail clamp, which makes the mechanical structure complicated and the control program complicated, which is not conducive to efficiently and accurately positioning the welding position of the welding nail and the ceramic ring. Summary of the invention

[0003] In view of the deficiencies in the prior art, the utility model provides an opening and closing mechanism of a ceramic ring clamp for a stud welding machine and a stud welding machine.

[0004] A ceramic ring clamp opening and closing mechanism comprises a driving member that can move up and down and a clamping member that can open and close left and right, the clamping member comprises two clamping rods arranged in parallel, the middle parts of the two clamping rods are respectively provided with fulcrums that can enable the clamping rods to rotate, and the clamping rods are also provided with elastic reset members; the driving member is provided with a first inclined surface and a second inclined surface that are gradually inclined inward from bottom to top and can enable the upper ends of the two clamping rods to move toward each other, and there is a travel space between the first inclined surface and the second inclined surface to accommodate the upper ends of the clamping rods.

[0005] By adopting the above technical solution, the driving member squeezes the upper end of the clamping member when moving downward, and the upper end of the clamping member moves relatively in the travel space. Under the action of the middle fulcrum, the lower end of the clamping member opens, driving the ceramic ring clamp to open; when the driving member moves upward, it disengages from the squeezing of the upper end of the clamping member, and the clamping member returns to its initial closed state under the action of the elastic reset member.

[0006] As a further improvement of the utility model, the driving member includes two driving arms, the first inclined surface and the second inclined surface are respectively arranged at the lower ends of the two driving arms, the upper ends of the two driving arms are connected, and the driving member is also provided with a top surface that can drive the clamping member downward to move downward, and the top surface is arranged on the lower surface where the two driving arms are connected. By adopting the above technical scheme, the clamping member is squeezed in the travel space of the inclined surface through the driving arm, and when the driving member moves downward to the top surface contacting the clamping member, the driving member drives the clamping member to move downward together. If the initial setting position of the ceramic ring clamp in the vertical direction needs to be moved downward to reach the final positioning position, the above-mentioned top surface can be set on the driving member to drive the ceramic ring clamp to move downward as a whole. If the initial setting position of the ceramic ring clamp in the vertical direction is the final positioning position, the above-mentioned top surface does not need to be set.

[0007] As a further improvement of the utility model, the driving member includes a first driving block, a second driving block and a third driving block, the first inclined surface is located at the lower end of the first driving block, the second inclined surface is located at the lower end of the second driving block, and the top surface that drives the clamping member downward is located at the lower end of the third driving block. By adopting the above technical solution, the clamping member is squeezed in the travel space of the inclined surface through the first driving block and the second driving block, and when the driving member moves downward to the top surface contacting the clamping member, the driving member drives the clamping member to move downward together. If the initial setting position of the ceramic ring clamp in the vertical direction needs to be moved downward to the final positioning position, the above-mentioned top surface can be set on the driving member to drive the ceramic ring clamp to move downward as a whole. If the initial setting position of the ceramic ring clamp in the vertical direction is the final positioning position, the above-mentioned top surface does not need to be set.

[0008] As a further improvement of the utility model, the two clamping rods are provided with a meshing portion between the two fulcrums. By adopting the above technical solution, the two fulcrums bite each other through the meshing portion during the rotation process, thereby reducing the friction resistance of the fulcrums.

[0009] As a further improvement of the utility model, a roller is provided at the upper end of the clamping member, and the roller is arranged in the travel space. The rolling friction resistance of the fixed shaft is smaller, and the lower end can squeeze the fixed shaft of the clamping member more smoothly, and the resistance is reduced. The fixed shaft and the driving member cooperate with each other to control the degree of opening and closing of the two clamping rods.

[0010] A stud welding machine comprises a welding gun that can be raised and lowered, a welding stud clamp, a ceramic ring clamp and an opening and closing mechanism of the ceramic ring clamp, wherein the ceramic ring clamp comprises two ceramic ring clamping pieces, the lower ends of two clamping rods of the opening and closing mechanism are respectively fixed to the two ceramic ring clamping pieces, and the driving member of the opening and closing mechanism is directly or indirectly fixed to the welding gun.

[0011] By adopting the above technical solution, when the welding gun drives the driving member to move downward, the upper end of the clamping member is squeezed, and the upper end of the clamping member moves relatively in the travel space. Under the action of the middle fulcrum, the lower end of the clamping member opens, driving the ceramic ring clamp to open; when the driving member moves upward, it is separated from the squeezing of the upper end of the clamping member, and the clamping member returns to the initial closed state under the action of the elastic reset member. The opening and closing movement of the ceramic ring clamp is combined with the lifting movement of the welding gun to realize the positioning of the welding nail and the ceramic ring, and the structure is ingenious and simple, and the stability is strong.

[0012] As a further improvement of the utility model, it also includes a ceramic ring clamp connecting rod, the lower end of which is fixedly connected to the two clamping rods, the upper end of which is directly or indirectly connected to the output shaft of a motor that can drive itself to move up and down, and the welding gun is slidably connected to the ceramic ring clamp connecting rod and is connected to the driving part of the opening and closing mechanism.

[0013] As a further improvement of the utility model, a connecting piece is provided on the clamping piece, a first connecting part is provided on the connecting piece, a mounting part of the fulcrum of the clamping piece is provided on the first connecting part; a second connecting part is provided on the connecting piece, a mounting part for sliding the ceramic ring clamp connecting rod is provided on the second connecting part; an installation space for accommodating the two clamping rods is provided between the first connecting part and the second connecting part.

[0014] As a further improvement of the utility model, a buffer and a buffer frame are also included, and a trigger arm that can drive the buffer is also provided on the first connecting part. By adopting the above technical solution, the trigger arm contacts the buffer when the clamping part moves downward with the welding gun, and a buffer spring is installed in the buffer to reduce vibration during the descent of the clamping part, so that the clamping part descends slowly and reduces impact energy. When the driving part moves upward, the buffer spring resets and pushes the clamping part to move upward.

[0015] As a further improvement of the utility model, it also includes a connecting seat for connecting the driving member and the welding gun, and the connecting seat is provided with a mounting portion for passing the welding gun, a mounting portion for passing the ceramic ring clamp connecting rod, and a mounting portion for the driving member.

[0016] A method for positioning a welding pin and a ceramic ring welding position, comprising the following steps in sequence:

[0017] (1) Pass the shank of the welding nail through the ceramic ring, and connect the head of the welding nail with the ceramic ring;

[0018] (2) The welding gun descends, driving the welding nail clamp to descend, and at the same time driving the driving part to descend;

[0019] (3) When the driving member descends to the first inclined surface and the second inclined surface to squeeze the clamping member of the ceramic ring clamp, the ceramic ring clamp connected to the lower end of the clamping member opens;

[0020] (4) The welding gun continues to move downward, and the clamping member moves within the travel space formed by the first inclined surface, the second inclined surface and the top surface of the driving member;

[0021] (5) When the top surface of the driving member contacts the upper end of the clamping member, the clamping member descends, and the ceramic ring clamp descends along with the clamping member;

[0022] (6) The welding nail clamp clamps the welding nail head;

[0023] (7) The welding gun rises upward, driving the welding nail head away from the porcelain ring;

[0024] (8) When the clamping member is separated from the driving member, that is, when the end of the welding nail rod rises to the bottom of the ceramic ring, the upper end of the clamping member opens under the action of the elastic reset member, and the lower end of the clamping rod moves toward each other, and the two ceramic ring clamps tighten the ceramic ring.

[0025] Compared with the prior art, the utility model has the following beneficial technical effects:

[0026] The utility model does not need to add a motor drive, simplifies the structure, and avoids the inconvenience of motor programming and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of Example 1 of the opening and closing mechanism of the ceramic ring clamp of the utility model;

[0028] Figure 2 It is a structural schematic diagram of another embodiment of the driving member of the opening and closing mechanism of the utility model;

[0029] Figure 3 This is a schematic diagram of the structure of the stud welding machine of the utility model;

[0030] Figure 4 This is a schematic diagram of the welding gun structure of the utility model;

[0031] Figure 5 It is a structural schematic diagram of a welding gun assembly in a stud welding machine of the utility model;

[0032] Figure 6 A schematic diagram of the structure of the clamping member provided by the utility model;

[0033] Figure 7 for Figure 1 Schematic diagram of the partial structure of part A of the stud welding machine;

[0034] Figure 8 for Figure 1 Schematic diagram of the partial structure of part B of the stud welding machine;

[0035] Fig. 9 It is a side structural schematic diagram of the stud welding machine involved in the utility model;

[0036] Fig.10 A schematic diagram of the separation structure of the stud welding machine provided by the utility model;

[0037] Fig.11 It is a schematic diagram of the exploded structure of the clamping jaw driving mechanism and welding gun provided by the utility model;

[0038] Fig.12 This is a schematic diagram of the structure of the clamping jaw driving mechanism provided by the utility model;

[0039] Fig.13 A schematic structural diagram of the clamping jaw driving mechanism provided by the utility model from another angle;

[0040] Fig.14 A schematic diagram of the structure of the clamping member provided by the utility model;

[0041] Fig.15 This is a schematic diagram of the structure of the ceramic ring clamp provided by the utility model;

[0042] Fig.16 A schematic diagram of the structure of the connecting piece provided by the utility model;

[0043] Fig.17 This is a schematic diagram of the structure of the connection base for connecting the driving member and the welding gun provided by the utility model;

[0044] Description of the numbers in the figure:

[0045] 1 opening and closing mechanism of ceramic ring clamp, 2 driving member, 21 first inclined surface, 22 second inclined surface, 23 top surface, 24 welding gun bottom plate, 25, 26 driving arm, 27 first driving block, 28 second driving block, 29 third driving block, 201 travel space, 3 clamping member, 31, 32 clamping rod, 33, 34 fulcrum, 35 elastic reset member (not shown in the figure), 36 fixed shaft, 37, 38 meshing part, 4 ceramic ring clamp, 41, 42 ceramic ring clamp piece, 401 clamping block, 402 connecting block, 403 chuck, 5 welding nail clamp, 6 connecting member, 61, 62 fulcrum mounting part, 63, 64 ceramic ring clamp connecting rod mounting part, 65 trigger arm, 60 1, 7 welding gun, 701 shaft protection sleeve, 702 upper gun barrel, 703 lower gun barrel, 704 ejector, 705 gun shaft spring, 706 gun shaft sensor plate, 707 ejector sensor plate, 708 gun shaft, 709 bakelite sleeve, 710 epoxy sleeve, 711 steel sleeve, 712 copper sleeve, 72 connecting seat for connecting drive part and welding gun, 723 limiting hole, 720 screw, 721 second through hole, 722 third through hole, 81, 82 ceramic ring clamp connecting rod, 9 welding nails, 10 ceramic ring, 11 buffer, 12 buffer frame, 13 metal connecting part, 14 metal connecting frame, 15 copper strip wheel, 16 copper strip wheel frame, 17 bearing, 18 clip strip. DETAILED DESCRIPTION

[0046] The following will combine the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments in the utility model belong to the scope of protection of the utility model.

[0047] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. Example

[0049] The invention discloses an opening and closing mechanism of a ceramic ring clamp for a stud welding machine, comprising a driving member 2 which can be moved up and down and a clamping member 3 which can be opened and closed left and right, wherein the clamping member 3 comprises two clamping rods 31 and 32 which are arranged in parallel, and the middle parts of the two clamping rods 31 and 32 are respectively provided with fulcrums 33 and 34 which can make the clamping rods rotate themselves, and the clamping rods 31 and 32 are also provided with elastic reset members 35; the driving member 2 is provided with a first inclined surface 21 and a second inclined surface 22 which are gradually inclined inwardly from bottom to top and can make the upper ends of the two clamping rods 31 and 32 move toward each other, and a travel space 201 for accommodating the upper ends of the clamping rods (31 and 32) is provided between the first inclined surface 21 and the second inclined surface 22.

[0050] The specific implementation of each component in the opening and closing mechanism of the above-mentioned ceramic ring clamp can be carried out in the following manner:

[0051] The first slope 21 and the second slope 22 that gradually slope inward from bottom to top mean that the relative distance between the bottoms of the first slope 21 and the second slope 22 is greater than the relative distance between the tops of the first slope 21 and the second slope 22 .

[0052] There is a travel space 201 between the first inclined surface 21 and the second inclined surface 22, which means that the driving member has a space for accommodating the clamping member.

[0053] As a preference, Figure 1 The driving member 2 may include two driving arms 25, 26, the first inclined surface 21 and the second inclined surface 22 are respectively arranged at the lower ends of the two driving arms 25, 26, and the upper ends of the two driving arms 25, 26 are connected. The driving member 2 is also provided with a top surface 23 which can drive the clamping member 3 to move downward, and the top surface 23 is arranged on the lower surface where the two driving arms 25, 26 are connected, and during the descending stroke of the driving member, the top surface 23 accommodates the clamping member before contacting the clamping member.

[0054] The driving member 2 formed by the two driving arms 25 , 26 and the connecting parts at the upper ends of the two driving arms 25 , 26 is shaped like a lowercase letter n, so that a travel space 201 is provided between the first inclined surface 21 , the second inclined surface 22 and the top surface 23 .

[0055] As a preference, Figure 2 The driving member 2 may further include a first driving block 27, a second driving block 28 and a third driving block 29, wherein the first inclined surface 21 is located at the lower end of the first driving block 27, the second inclined surface 22 is located at the lower end of the second driving block 28, and the top surface 23 that drives the clamping member 3 downward is located at the lower end of the third driving block 29.

[0056] The first driving block 27 , the second driving block 28 and the third driving block 29 may be three independent blocks or rods or plates that are not connected to each other.

[0057] The fixed shaft 36 at the upper end of the clamping member 3 refers to a friction member such as a roller or a bearing fixed on the clamping member 3, which is squeezed to move in the stroke space during the descending process of the driving member to reduce friction resistance.

[0058] The clamping rods 31 and 32 are rod-shaped or rod-like and are used to transmit the clamping force.

[0059] The middle part of the two clamping rods 31 and 32 refers to the part of the clamping rods 31 and 32 that is not the two ends, and does not only refer to the center part, and can be the part close to the upper end or the part close to the lower end.

[0060] The self-rotation means that the clamping rods 31 and 32 can make partial circular motion with the fulcrums 33 and 34 as the center or axis;

[0061] The fulcrums 33 and 34 that can rotate themselves refer to the centers or axes of the clamping rods 31 and 32 for partial circular motion.

[0062] The elastic return member 35 may be a spring disposed between two clamping rods 31 and 32 above the fulcrums 33 and 34, respectively; or a spring disposed between two clamping rods 31 and 32 below the fulcrums 33 and 34, respectively; or a torsion spring disposed at the fulcrums 33 and 34, respectively.

[0063] The upper ends of the two clamping rods 31 , 32 move toward each other, which means that the upper ends of the two clamping rods 31 , 32 are close to each other, and the lower ends of the two clamping rods 31 , 32 are separated from each other, that is, opened.

[0064] The top surface 23 that drives the clamping member 3 downward means that when the driving member descends, the top surface 23 thereon will contact the fixed shaft 36 of the clamping member and drive the clamping member to descend.

[0065] As a preference, Fig.14 The two clamping rods 31 , 32 are provided with meshing portions 37 , 38 between the two fulcrums 33 , 34 .

[0066] Preferably, a roller 36 is disposed at the upper end of the clamping member 3 , and the roller 36 is disposed in the travel space 201 . Example

[0067] This embodiment applies the opening and closing mechanism of the ceramic ring clamp of Embodiment 1 to the ceramic ring clamp of the stud welding machine.

[0068] A stud welding machine, such as Figure 3 , including a welding gun 7 that can be raised and lowered, a welding nail clamp 5, a ceramic ring clamp 4 and the opening and closing mechanism described in Example 1, the ceramic ring clamp 4 includes two ceramic ring clamping pieces 41, 42, the lower ends of the two clamping rods 31, 32 of the opening and closing mechanism of the ceramic ring clamp are respectively fixed to the two ceramic ring clamping pieces 41, 42, the driving part 2 of the opening and closing mechanism is directly or indirectly fixed to the welding gun 7, and the ceramic ring clamp connecting rods 81, 82 are fixedly connected to the two clamping rods 31, 32.

[0069] Preferably, it also includes ceramic ring clamp connecting rods 81, 82, the lower ends of which are fixedly connected to the two clamping rods 31, 32, and the upper ends of which are directly or indirectly connected to the output shaft of a motor that can drive itself to move up and down, and the welding gun 7 is slidably connected to the ceramic ring clamp connecting rods 81, 82 and connected to the driving part 2 of the opening and closing mechanism.

[0070] Preferably, a connecting member 6 is provided on the clamping member 3, a first connecting portion is provided on the connecting member 6, and mounting portions 61, 62 for the fulcrums 33, 34 of the clamping member 3 are provided on the first connecting portion; a second connecting portion is provided on the connecting member 6, and mounting portions 63, 64 for slidingly installing the ceramic ring clamp connecting rods 81, 82 are provided on the second connecting portion; an installation space for accommodating the two clamping rods 31, 32 is provided between the first connecting portion and the second connecting portion.

[0071] Preferably, a buffer 11 and a buffer frame 12 are further included, and a trigger arm 65 capable of driving the buffer is also provided on the first connecting portion.

[0072] Preferably, it further comprises a connecting seat 72 for connecting the driving member and the welding gun, wherein the connecting seat 72 is provided with a mounting portion for passing the welding gun, a mounting portion for passing the ceramic ring clamp connecting rods 81 and 82, and a mounting portion for the driving member.

[0073] The specific implementation of each component in the above stud welding machine can be carried out in the following manner:

[0074] like Figure 4 , including a shaft protection sleeve 701, an upper gun barrel 702, a lower gun barrel 703, a gun shaft spring 705, an epoxy sleeve 710, a steel sleeve 711, a copper sleeve 712, a ejector pin 704, a gun shaft 708, a bakelite sleeve 709, a gun shaft sensor sheet 706, an ejector pin sensor sheet 707, a screw 720, a second through hole 721, a third through hole 722, 13 metal connectors, and 14 metal connecting frames.

[0075] The upper gun barrel 702 and the lower gun barrel 703 are connected by threads to form a gun barrel. The lower gun barrel 703 is a stepped cylindrical structure. The upper section is a large-size section and the lower section is a small-size section. The inner wall of the gun barrel has a step portion at the connection between the large-size section and the small-size section. The upper and lower ends of the gun barrels 702 and 703 are open. Through holes are provided on the opposite side walls of the small-size section of the gun barrel for screws and epoxy sleeves 710 to pass through. The screws pass through the through holes on the lower gun barrel 703 and are connected to the gun shaft 708. A copper sleeve 712 and a steel sleeve 711 are arranged between the epoxy sleeve 710 and the lower gun barrel 703.

[0076] Welding gun components, such as Figure 5 , including a welding gun 7, a motor, a connecting seat 72 for connecting a driving member and the welding gun, a metal connecting member 13, a metal connecting frame 14, a copper strip wheel 15, a copper strip wheel frame 16, and a bearing 17.

[0077] A metal connector 13 is arranged inside the upper gun barrel 702 and the lower gun barrel 703. The upper end of the welding nail clamp 5 is connected to the metal connector 13 through a nut. The shaft protection sleeve 701 is connected to the metal connector 13. The upper end of the metal connector 13 is connected to the ejector pin 704. The metal connector 13 can be a conductive component such as a copper nut or a metal shaft-shaped connector, which is used to connect the ejector pin 704 and the welding nail clamp 5. The metal connecting frame 14 is tightly connected to the metal connector 13. The metal connecting frame 14 is L-shaped. The horizontal part of the metal connecting frame 14 is connected between the copper nut and the connector of the metal connector 13. The upper end of the vertical part can be externally connected to a wire. A copper strip wheel 15 passes through the top of the metal connecting frame 14. The copper strip wheel 15 is fixed on the copper strip wheel seat 16 and is fixedly connected to the connecting seat 72 for connecting the driving member and the welding gun through the copper strip wheel frame 16.

[0078] The periphery of the ejector pin 704 is sequentially sleeved with a gun shaft 708, a copper sleeve 712, a steel sleeve 711 and an epoxy sleeve 710 from the inside to the outside. The gun shaft spring 705 is sleeved on the outer wall of the ejector pin 704 and is located in the copper sleeve 712. An inwardly protruding flange can be provided in the epoxy sleeve 710. One end of the gun shaft spring 705 abuts against the shaft protection sleeve 701 and is connected to the flange in the epoxy sleeve 710. The other end of the gun shaft spring 705 is directly or indirectly connected to the gun shaft 708 through the epoxy sleeve 710.

[0079] The gun shaft induction sheet 706 is in the shape of a circular ring. The gun shaft induction sheet 706 is relatively fixedly connected to the bakelite sleeve 709. A through hole is provided in the middle of the gun shaft induction sheet 706 and the bakelite sleeve 709 for the upper end of the ejector pin 704 to pass through. The upper part is connected to the ejector induction sheet 707. The ejector induction sheet 707 is in a stepped cylindrical structure, and a flange extending inward is provided at the bottom. The lower part of the ejector induction sheet 707 is a small-sized section, and the upper part is a large-sized section. The connection is in a step-shaped manner. The step-shaped connection is placed on the flange in the connecting seat, and the small-sized section extends out of the connecting seat. The ejector induction sheet 707 is sleeved on the outer periphery of the upper end of the ejector pin 704, that is, the gun shaft induction sheet 706 is located between the ejector induction sheet 707 and the ejector pin 704.

[0080] A pin is penetrated through the outer wall of the gun shaft 708, a second through hole 721 for the pin to move up and down is opened on the side wall of the steel sleeve 711, and a third through hole 722 for the pin to move up and down is opened on the side wall of the copper sleeve 712. The second through hole 721 is aligned with the third through hole 722, and the end of the pin extends into the second through hole 721 and the third through hole 722. The second through hole 721 and the third through hole 722 are both long strip through holes, which can only allow the pin to move up and down, but cannot cause the ejector pin 704 to rotate relative to the gun shaft 708, that is, it is ensured that the ejector pin 704 can only move up and down relative to the gun barrel but cannot rotate relative to the gun barrel. The matching arrangement of the pin and the second through hole 721 and the third through hole 722 can also play a limiting role to prevent the ejector pin 704 from falling out of the gun barrel.

[0081] The welding nail clamp 5 has a stepped tubular structure, with the lower size larger than the upper size. The side wall of the welding nail clamp is evenly provided with a number of vertical gaps, which is conducive to a certain degree of deformation of the welding nail clamp when clamping the welding nail, so that the inner wall of the welding nail clamp can reliably clamp the welding nail.

[0082] like Fig.15 The ceramic ring clamp 4 includes two ceramic ring clamping pieces 41 and 42.

[0083] The lower ends of the two clamping rods 31, 32 are respectively fixed to the two ceramic ring clamps 41, 42, and the two ceramic ring clamps 41, 42 are symmetrically hinged on the clamping member 3. The lower part of the clamping member 3 and the ceramic ring clamp 4 can be connected by screws, or by a locking method of a card. The ceramic ring clamps 41, 42 include a clamping block 401, a connecting block 402 and a chuck 403 connected from top to bottom. There are two clamping blocks 401, connecting blocks 402 and chucks 403. The clamping block 401 is hinged on the clamping rods 41, 42, and the outer side of the clamping block 401 is connected to the connecting block 402. The connecting block 402 is connected to the chuck 403, and the lower ends of the chucks 403 on the two ceramic ring clamps 41, 42 are inclined toward the side close to the ceramic ring 10.

[0084] Ceramic ring clamp connecting rod 81, 82

[0085] There are two ceramic ring clamp connecting rods 81, 82, and the ceramic ring clamp connecting rods 81, 82 are arranged in parallel and vertically. The driving part 2 of the opening and closing mechanism is directly or indirectly fixed to the welding gun 7 through the ceramic ring clamp connecting rods 81, 82, and the ceramic ring clamp connecting rods 81, 82 are fixedly connected to the two clamping rods 31, 32.

[0086] The two ceramic ring clamp connecting rods 81 and 82 can be connected through a connecting seat 72 for connecting a driving member and a welding gun. The connecting seat 72 for connecting a driving member and a welding gun is transversely penetrated in the ceramic ring clamp connecting rods 81 and 82. The bearing 17 is fixedly penetrated between the ceramic ring clamp connecting rods 81 and 82 and the connecting seat 72 for connecting a driving member and a welding gun. Fig.17 The connecting seat 72 for connecting the driving member and the welding gun includes a large ring body and two small ring bodies, which are respectively approximately located at the three vertices of a triangle. The welding gun 7 is movably inserted into the annular structure of the large ring body, and the ceramic ring clamp connecting rods 81 and 82 are fixedly inserted into the annular structure of the small ring body. A limiting hole 723 is installed on the connecting seat 72 for connecting the driving member and the welding gun to connect the large ring body and the small ring body. The limiting hole 723 is fastened by a rib plate or a screw, and the position of the connecting seat 72 for connecting the driving member and the welding gun relative to the ceramic ring clamp connecting rods 81 and 82 can be adjusted.

[0087] The opening and closing mechanism 1 of the ceramic ring clamp can be applied to the ceramic ring clamp in the stud welding machine, the driving member 2 of the opening and closing mechanism is fixedly connected to the welding gun 7 that can be lifted and lowered, and the lower ends of the two clamping rods 31, 32 of the opening and closing mechanism are connected to the two ceramic ring clamps 41, 42. The above structure can realize that the driving member 2 drives the ceramic ring clamp 4 to open as the welding gun 7 descends, and the driving member 2 is freed from the constraint on the ceramic ring clamp 4 as the welding gun 7 rises and returns to a closed state to clamp the ceramic ring clamp.

[0088] The stud welding machine can locate the welding position of the welding stud 9 and the ceramic ring 10, so as to facilitate the subsequent welding of the welding stud 9 to the weldment. The stud welding machine of the present application includes but is not limited to a short-cycle automatic stud welding machine, a long-cycle automatic stud welding machine, and the like.

[0089] The welding gun 7 that can be lifted and lowered is in a stepped cylindrical structure, with the upper section being a large-sized section and the lower section being a small-sized section. The upper and lower ends of the welding gun 7 are both open, and an insulating tube 71 is provided on the end of the small-sized section of the gun barrel opposite to the welding nail clamp. The welding gun assembly may include the welding gun 7, a motor, a connecting seat 72 for connecting the driving member and the welding gun, a metal connecting member 13, a metal connecting frame 14, a copper strip wheel 15, a copper strip wheel frame 16, and a bearing 17. The motor is above the welding gun 7 and drives the welding gun 7 to move up and down.

[0090] The welding nail clamp 5 is connected to the welding gun 7, and the opening and closing mechanism 1 is connected to the welding gun 7 and the ceramic ring clamps 41 and 42. When the welding gun 7 moves downward, the welding nail clamp 5 clamps the welding nail 9, and the clamping rods 31 and 32 drive the ceramic ring clamps 41 and 42 to open outward.

[0091] The welding nail clamp 5 is installed below the welding gun 7. The welding nail clamp 5 is inserted into the clamp head 403 to clamp the welding nail, and is made of a metal conductive material. The welding nail clamp 5 is a stepped tubular structure, and the lower size is larger than the upper size. The side wall of the welding nail clamp 5 is provided with a number of gaps, which is conducive to a certain degree of deformation of the welding nail clamp 5 when clamping the welding nail, so that the inner wall of the welding nail clamp 5 can reliably clamp the welding nail. The length of the welding nail clamp 5 can be set according to the length of the welding nail, and can be long or short. The longer welding nail clamp 5 can clamp a 100mm welding nail, which is an extended welding nail clamp 5.

[0092] The lower ends of the two clamping rods 31 , 32 of the opening and closing mechanism are respectively fixed to two ceramic ring clamping pieces 41 , 42 , which means that the opening and closing mechanism 1 is directly or indirectly connected to the welding gun 7 .

[0093] The two driving arms 25 and 26 of the driving member can be fixedly connected to the welding gun bottom plate 24. The driving arms 25 and 26 are provided with inclined surfaces so that a horizontal inward squeezing force is generated when the driving member 2 moves downward. The outer edge contour of the welding gun bottom plate 24 is roughly rectangular, and it is a rectangular frame structure. There are transverse ribs in the rectangular frame, and the vertical two side beams of the rectangular frame are connected with connecting strips. The welding gun bottom plate 24 can be connected to the ceramic ring clamp connecting rods 81 and 82 through the connecting seat 72 for connecting the driving member and the welding gun. The driving member 2 is directly or indirectly fixed to the welding gun 7 through the connecting seat 72 for connecting the driving member and the welding gun, and the ceramic ring clamp connecting rods 81 and 82 are inserted into the connecting seat 72 for connecting the driving member and the welding gun.

[0094] The following structures can be added, and the overall structure is as follows Figure 6-13 .

[0095] Connector 6, such as Fig.16 The connecting member 6 is provided with mounting parts 61 and 62 of the fulcrums 33 and 34, and mounting parts 63 and 64 of the ceramic ring clamp connecting rods 81 and 82 and a trigger arm 65 of the driving buffer are slidably provided. The clamping rods 31 and 32 are connected to each other through the connecting member 6.

[0096] The connecting member 6 includes a trigger arm 65 and two mounting parts. The position of the connecting member 6 that coincides with the fulcrum in the vertical direction is provided with fulcrum mounting parts 61, 62 to limit the displacement of the fulcrums 33, 34; the connecting member 6 is passed through the lower part of the ceramic ring clamp connecting rod 81, 82, and the ceramic ring clamp connecting rod 81, 82 is fixedly connected to the connecting member mounting parts 63, 64 by nuts.

[0097] (2) Buffer 8 and buffer frame 9. The connecting member 6 is provided with a trigger arm 65 for driving the buffer.

[0098] The trigger arm 65 is on the other side of the connecting member 6, above the buffer 6, and is used to trigger the buffer 6 when the clamping member 3 descends. The buffer is fixed on the buffer frame 9, and the buffer frame 9 is fixedly connected to the spring bar 18 for placing the ceramic ring and the welding nail. The buffer 5 is used to reduce vibration during the descent of the clamping member, so that the clamping member descends slowly and reduces the impact energy.

[0099] A method for positioning a welding pin and a ceramic ring welding position, comprising the following steps in sequence:

[0100] (1) The welding nail rod 92 passes through the ceramic ring 10, and the welding nail head 91 is connected to the ceramic ring 10;

[0101] (2) The welding gun 7 descends, driving the welding nail clamp 5 to descend, and at the same time driving the driving member 2 to descend;

[0102] (3) When the driving member 2 descends to the point where the first inclined surface 21 and the second inclined surface 22 squeeze the clamping member 3 of the ceramic ring clamp, the ceramic ring clamp 4 connected to the lower end of the clamping member 3 opens;

[0103] (4) The welding gun 7 continues to move downward, and the clamping member 3 moves in the travel space 201 formed by the first inclined surface 21, the second inclined surface 22 and the top surface 23 of the driving member;

[0104] (5) When the top surface 23 of the driving member 2 contacts the upper end of the clamping member, the clamping member 3 descends, and the ceramic ring clamp descends along with the clamping member;

[0105] (6) The welding nail clamp 5 clamps the welding nail head 91;

[0106] (7) The welding gun 7 rises upward, driving the welding nail head 91 away from the ceramic ring 10;

[0107] (8) When the clamping member 3 is separated from the driving member 2, that is, when the end of the welding nail rod 92 rises to the bottom of the ceramic ring 10, the upper end of the clamping member 3 opens under the action of the elastic reset member 35, and the lower ends of the clamping rods 31 and 32 move toward each other, and the two ceramic ring clamping jaws 41 and 42 tighten the ceramic ring.

[0108] When in use, the stud welding machine positioning welding pins and ceramic ring welding positions are roughly divided into the following steps:

[0109] A welding nail 9 is placed on the clip strip 18, and a ceramic ring 10 is sleeved on each welding nail 9. The ceramic ring 10 is located at a position 91 close to the head of the welding nail 9. Figures 1 to 5 The stud welding machine is used to load and remove the welding nail 9, and the motor drives the welding gun 7 to move to the position close to the welding nail 9 on the clip strip 18, driving the opening and closing mechanism 1 to open the ceramic ring clips 41 and 42.

[0110] When the welding gun 7 moves toward the welding nail 9, since the driving member 2 is fixedly connected to the welding gun 7, the driving member 2 moves along with the welding gun 7. The driving member 2 is located at the upper part of the clamping member 3. During the downward movement of the driving member 2, the driving member 2 horizontally squeezes the upper fixed shaft 36 of the clamping member. The clamping member 3 contracts inwardly under the action of the first inclined surface 21 and the second inclined surface 22. Under the action of the lever, the lower ends of the clamping rods 31 and 32 can be driven to move in the opposite direction to control the opening and closing of the ceramic ring clamps 41 and 42 connected to the lower part of the clamping member 3. When the clamping rods 31 and 32 and the ceramic ring clamps 41 and 42 are opening and closing, the elastic reset member 35 is in a stretched state.

[0111] At this time, the welding gun 7 continues to move downward, driving the clamping member 3 to move downward, and the clamping member fixed shaft 36 moves in the travel space 201 of the driving member. When the clamping member 3 is squeezed to a certain position, the clamping member fixed shaft 36 contacts the top surface 23 of the driving member, and the clamping rods 31, 32 and the ceramic ring clamp connecting rods 81, 82 move downward as a whole under the action of the welding gun 7; the trigger arm 65 of the connecting member 6 abuts against the buffer 5, and under the action of the buffer, the welding gun 7 slowly descends until the ceramic ring clamps 41, 42 contact the spring strip 18 for placing the welding nails 9 and the ceramic rings 10, then the welding gun 7 stops moving, the welding nail clamp 5 clamps the welding nail, and the preparation work for clamping the ceramic ring clamps 41, 42 is completed.

[0112] After the welding nail clamp 5 clamps the welding nail 9, the motor rotates in the opposite direction to drive the welding gun 7 to move upward, and the welding nail clamp 5 moves upward, thereby pulling the welding nail head 8 and the ceramic ring 9 apart by a certain distance, and the welding gun 7 drives the driving member 2 to move upward. When the fixed shaft 36 of the clamping member disengages from the travel space 201 of the clamping member movement in the driving member, the lower ends of the clamping rods 31 and 32 are reset under the action of the elastic reset member 35, driving the ceramic ring clamps 41 and 42 to close. After the ceramic ring clamps 41 and 42 are tightened, they clamp the ceramic ring 9, and the relative distance between the welding nail 9 and the ceramic ring 10 no longer expands. At this time, the bottom surface of the ceramic ring 10 is lower than or flush with the bottom surface of the welding nail 9. The motor is turned to drive the stud welding machine to place the welding nail with the ceramic ring positioned on the display table, and the stud welding machine moves to the initial position to complete the steps of loading and unloading welding nails and ceramic rings;

[0113] Repeat the above steps to repeatedly complete the process of taking out and positioning the welding nails. The size of the display table can be set as needed to place more or more appropriate numbers of welding nails. Of course, the feeding mechanism of the automatic welding gun 7 such as an automatic nail arrangement device can also be used to automatically arrange and feed the welding nails in bulk, and the welding gun 7 is in a fixed position when taking out the nails, thereby improving efficiency.

[0114] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An opening and closing mechanism of a ceramic ring clamp for a stud welding machine, characterized in that: The invention comprises a driving member (2) which can be moved up and down and a clamping member (3) which can be opened and closed left and right, wherein the clamping member (3) comprises two clamping rods (31, 32) arranged in parallel, wherein the middle parts of the two clamping rods (31, 32) are respectively provided with fulcrums (33, 34) which can enable the clamping rods (31, 32) to rotate, and the clamping rods (31, 32) are also provided with elastic reset members (35); the driving member (2) is provided with a first inclined surface (21) and a second inclined surface (22) which are gradually inclined inwardly from bottom to top and can enable the upper ends of the two clamping rods (31, 32) to move towards each other, and a travel space (201) for accommodating the upper ends of the clamping rods (31, 32) is provided between the first inclined surface (21) and the second inclined surface (22).

2. The opening and closing mechanism of the ceramic ring clamp for stud welding machine according to claim 1 is characterized in that: The driving member (2) comprises two driving arms (25, 26), the first inclined surface (21) and the second inclined surface (22) are respectively arranged at the lower ends of the two driving arms (25, 26), the upper ends of the two driving arms (25, 26) are connected, and the driving member (2) is also provided with a top surface (23) capable of driving the clamping member (3) to move downward, and the top surface (23) is arranged on the lower surface of the connection between the two driving arms (25, 26).

3. The opening and closing mechanism of the ceramic ring clamp for stud welding machine according to claim 1 is characterized in that: The driving member (2) comprises a first driving block (27), a second driving block (28) and a third driving block (29); the first inclined surface (21) is located at the lower end of the first driving block (27); the second inclined surface (22) is located at the lower end of the second driving block (28); and the top surface (23) for driving the clamping member (3) downward is located at the lower end of the third driving block (29).

4. The opening and closing mechanism of the ceramic ring clamp for stud welding machine according to claim 1 is characterized in that: The two clamping rods (31, 32) are provided with meshing portions (37, 38) between the two supporting points (33, 34).

5. The opening and closing mechanism of the ceramic ring clamp for stud welding machine according to claim 1 is characterized in that: A roller (36) is provided at the upper end of the clamping member (3), and the roller (36) is arranged in the travel space (201).

6. A stud welding machine, characterized in that: It comprises a welding gun (7) that can be raised and lowered, a welding nail clamp (5), a ceramic ring clamp (4) and an opening and closing mechanism of the ceramic ring clamp as described in any one of claims 1 to 5, wherein the ceramic ring clamp (4) comprises two ceramic ring clamping pieces (41, 42), the lower ends of two clamping rods (31, 32) of the opening and closing mechanism are respectively fixedly connected to the two ceramic ring clamping pieces (41, 42), and the driving member (2) of the opening and closing mechanism is directly or indirectly fixed to the welding gun (7).

7. A stud welding machine according to claim 6, characterized in that: It also includes a ceramic ring clamp connecting rod (81, 82), the lower end of the ceramic ring clamp connecting rod (81, 82) is fixedly connected to the two clamping rods (31, 32), the upper end of the ceramic ring clamp connecting rod (81, 82) is directly or indirectly connected to the output shaft of a motor that can drive itself to move up and down, and the welding gun (7) is slidably connected to the ceramic ring clamp connecting rod (81, 82) and connected to the driving member (2) of the opening and closing mechanism.

8. A stud welding machine according to claim 6, characterized in that: The clamping member (3) is provided with a connecting member (6), the connecting member (6) is provided with a first connecting portion, the first connecting portion is provided with a mounting portion (61, 62) of a fulcrum (33, 34) of the clamping member (3); the connecting member (6) is provided with a second connecting portion, the second connecting portion is provided with a mounting portion (63, 64) for slidingly mounting the ceramic ring clamp connecting rod (81, 82); and a mounting space for accommodating the two clamping rods (31, 32) is provided between the first connecting portion and the second connecting portion.

9. A stud welding machine according to claim 8, characterized in that: It also includes a buffer (11) and a buffer frame (12), and the first connecting portion is also provided with a trigger arm (65) capable of driving the buffer.

10. A stud welding machine according to claim 6, characterized in that: It also comprises a connecting seat (72) for connecting the driving member and the welding gun, wherein the connecting seat (72) is provided with a mounting portion for passing the welding gun, a mounting portion for passing the ceramic ring clamp connecting rod (81, 82) and a mounting portion for the driving member.

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