Mechanical welding clamp

Abstract

The utility model relates to the technical field of clamps, and discloses a mechanical welding clamp, which solves the technical problems of clamping each metal piece and improving the welding efficiency, and comprises a machine table, a left supporting seat, a left pushing mechanism, a right supporting seat, a right pushing mechanism and at least two downward pressing mechanisms, the left pushing mechanism is used for pushing a first metal piece on the left supporting seat, and the right pushing mechanism is used for pushing a second metal piece on the right supporting seat; the right pushing mechanism is used for pushing the second metal piece onto the right supporting seat; the pressing mechanism is used for pressing the third metal piece on the first metal piece and the second metal piece, so that the left end and the right end of the third metal piece are in butt joint with the upper end of the first metal piece and the upper end of the second metal piece correspondingly. The welding fixture can quickly clamp each metal piece and improve the positioning precision of each metal piece, so that the efficiency and the quality of manufacturing the shell assembly are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of clamp, especially relates to a mechanical welding fixture. BACKGROUND

[0002] In the production process of the coffee machine, a plurality of metal pieces are welded to form a shell assembly, at present, the metal pieces are usually fixed by at least two common clamping mechanisms, and then the metal pieces are spliced together for welding operation, which is low in efficiency, and the positioning accuracy between the metal pieces is poor, so that the size accuracy of the shell assembly is low and the welding quality is poor. SUMMARY

[0003] The utility model aims at least to solve one of the technical problems existing in the prior art. Therefore, the utility model provides a mechanical welding fixture which can quickly clamp each metal piece and improve the positioning accuracy of each metal piece.

[0004] The mechanical welding fixture according to the utility model embodiment comprises a machine table, a left supporting seat, a left pushing mechanism, a right supporting seat, a right pushing mechanism and at least two pressing mechanisms, the left supporting seat, the left pushing mechanism, the right supporting seat and the right pushing mechanism are arranged on the machine table, the left supporting seat and the right supporting seat are distributed left and right, the left pushing mechanism is used for pushing a first metal piece on the left supporting seat, the right pushing mechanism is used for pushing a second metal piece on the right supporting seat, and all the pressing mechanisms are arranged on the left supporting seat and the right supporting seat, and the pressing mechanism is used for pressing a third metal piece on the first metal piece and the second metal piece, so that the left and right ends of the third metal piece are respectively connected with the upper end of the first metal piece and the upper end of the second metal piece.

[0005] At least has the following beneficial effects:

[0006] The first metal piece and the second metal piece are pushed on the left supporting seat and the right supporting seat by the left pushing mechanism and the right pushing mechanism respectively, and then the third metal piece is pressed on the first metal piece and the second metal piece by all the pressing mechanisms, so that the left and right ends of the third metal piece are respectively connected with the upper end of the first metal piece and the upper end of the second metal piece, the positioning and fixing of the first metal piece, the second metal piece and the third metal piece are completed, then the first metal piece, the second metal piece and the third metal piece can be welded to form a shell assembly, the welding fixture can quickly clamp each metal piece and improve the positioning accuracy of each metal piece, thereby improving the efficiency and quality of producing the shell assembly.

[0007] According to some embodiments of the utility model, right push mechanism includes first connecting seat, sliding rod and roof, first connecting seat locate on the machine platform, sliding rod can be along left and right direction slidingly set up on first connecting seat, roof is connected with the left end of sliding rod, roof is used for with second metal piece push on right support base.

[0008] According to some embodiments of the utility model, right push mechanism still includes first handle, first connecting rod and second connecting rod, one end of first handle is hinged on first connecting seat, the middle part of first handle is equipped with support plate, one end of first connecting rod is hinged on first connecting seat, one end of second connecting rod is hinged with the right end of sliding rod, support plate, the other end of first connecting rod and the other end of second connecting rod are hinged together, when first handle is horizontal, the length direction of first connecting rod, second connecting rod and sliding rod are all left and right directions, when the other end of first handle swings upwards, the other end of first connecting rod and the other end of second connecting rod are offset upwards, to make sliding rod and roof move right.

[0009] According to some embodiments of the utility model, the left end of sliding rod and roof are connected in detachable mode.

[0010] According to some embodiments of the utility model, right support base is slidably set up on machine platform, to adjust the interval between left support base and right support base.

[0011] According to some embodiments of the utility model, right support base includes bottom plate, one of bottom plate and machine platform is equipped with long round hole, and the other is equipped with connecting hole, the length direction of long round hole is parallel to left and right directions, fastener is arranged in long round hole and connecting hole.

[0012] According to some embodiments of the utility model, down-pressing mechanism includes second connecting seat, swing arm, pressing block and second handle, second connecting seat is connected with left support base / right support base, one end of swing arm is hinged with second connecting seat, the other end of swing arm is connected with pressing block, second handle is connected with swing arm, second handle is used to drive swing arm to swing in the plane perpendicular to left and right directions, to make pressing block press third metal piece downwards or avoid the position directly above third metal piece.

[0013] According to some embodiments of the present application, the lower pressing mechanism further comprises a third connecting rod, one end of the third connecting rod is hingedly connected with the middle section of the second handle, the other end of the third connecting rod is hingedly connected with the middle section of the swing arm, one end of the second handle is hingedly connected with the second connecting seat, there is a first hinging point between one end of the second handle and the second connecting seat, there is a second hinging point between one end of the swing arm and the second connecting seat, the first hinging point is closer to the pressing block than the second hinging point, when the other end of the second handle swings towards the direction close to the pressing block, one side surface of the pressing block faces downward and presses the third metal piece downward.

[0014] According to some embodiments of the present application, the lower pressing mechanism further comprises an adapter rod, the other end of the swing arm is connected with the pressing block through the adapter rod, the adapter rod is perpendicular to the swing arm, one end of the adapter rod is threadedly connected with the pressing block.

[0015] According to some embodiments of the present application, the other end of the adapter rod is slidably connected with the other end of the swing arm, so as to adjust the distance between the pressing block and the other end of the swing arm, an elastic member is arranged between the pressing block and the other end of the swing arm, the elastic member forces the pressing block to be away from the other end of the swing arm.

[0016] Additional aspects and advantages of the present application will be given in part in the following description, become apparent from the following description, or be understood by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present application will be further described below in combination with the drawings and embodiments, wherein:

[0018] Figure 1 is a structural schematic view of the embodiment of the present application;

[0019] Figure 2 is a structural schematic view of the embodiment of the present application hidden behind the machine table;

[0020] Figure 3 is Figure 2 is a local enlarged schematic view of position A in the middle;

[0021] Figure 4 is a structural schematic view of the lower pressing mechanism of the embodiment of the present application;

[0022] LIST OF ELEMENTS

[0023] machine table 100; mounting plate 110;

[0024] left supporting seat 200;

[0025] left pushing mechanism 300;

[0026] Right support seat 400; bottom plate 410; long circular hole 411;

[0027] Right push mechanism 500; first connecting seat 510; sliding rod 520; top plate 530; first handle 540; support plate 541; first connecting rod 550; second connecting rod 560;

[0028] Downward pressing mechanism 600; second connecting seat 610, swing arm 620, pressing block 630 and second handle 640; third connecting rod 650; adapter rod 660; elastic member 670. DETAILED DESCRIPTION

[0029] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0030] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0031] In the description of the present application, the plural means more than two. If there is a description of first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0032] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application according to the specific content of the technical solution.

[0033] Referring to Figure 1 and Figure 2 The present application discloses a mechanical welding fixture, comprising a machine table 100, a left support seat 200, a left push mechanism 300, a right support seat 400, a right push mechanism 500 and at least two downward pressing mechanisms 600.

[0034] The left supporting seat 200, the left pushing mechanism 300, the right supporting seat 400 and the right pushing mechanism 500 are all arranged on the machine table 100, the left supporting seat 200 and the right supporting seat 400 are distributed left and right, the left pushing mechanism 300 is used for pushing the first metal piece on the left supporting seat 200; the right pushing mechanism 500 is used for pushing the second metal piece on the right supporting seat 400; all the pressing mechanisms 600 are arranged on the left supporting seat 200 and the right supporting seat 400, and the pressing mechanism 600 is used for pressing the third metal piece on the first metal piece and the second metal piece, so that the left and right ends of the third metal piece are respectively connected with the upper end of the first metal piece and the upper end of the second metal piece.

[0035] The first metal piece and the second metal piece are respectively pushed on the left supporting seat 200 and the right supporting seat 400 by the left pushing mechanism 300 and the right pushing mechanism 500, and then the third metal piece is pressed on the first metal piece and the second metal piece by all the pressing mechanisms 600, so that the left and right ends of the third metal piece are respectively connected with the upper end of the first metal piece and the upper end of the second metal piece, the positioning and fixing of the first metal piece, the second metal piece and the third metal piece are completed, and then the upper end of the first metal piece and one end of the third metal piece and the upper end of the second metal piece and the other end of the third metal piece are welded together, so as to manufacture the shell assembly of the coffee machine.

[0036] The welding fixture can realize rapid clamping of each metal piece and improve the positioning accuracy of each metal piece, thereby improving the efficiency and quality of manufacturing the shell assembly.

[0037] Referring to Figure 2 and Figure 3 In some embodiments, the machine table 100 is provided with a mounting plate 110, and the left supporting seat 200, the left pushing mechanism 300, the right supporting seat 400 and the right pushing mechanism 500 are all arranged on the machine table 100 through the mounting plate 110. The left supporting seat 200, the left pushing mechanism 300, the right supporting seat 400 and the right pushing mechanism 500 can be first fixed on the mounting plate 110, and then the mounting plate 110 is fixed on the machine table 100, and then the mounting plate 110 is detached from the machine table 100, so as to complete the dismounting of the left supporting seat 200, the left pushing mechanism 300, the right supporting seat 400 and the right pushing mechanism 500 from the machine table 100. Through the mounting plate 110, the left supporting seat 200, the left pushing mechanism 300, the right supporting seat 400 and the right pushing mechanism 500 can be quickly mounted on the machine table 100 and dismounted from the machine table 100.

[0038] The left support base 200 and the right support base 400 are the same in structure and are symmetrically arranged left and right. The right support base 400 comprises a front support plate, a connecting plate, a rear support plate and a bottom plate 410. The front support plate and the rear support plate are arranged front and back. The connecting plate connects the middle sections of the front support plate and the rear support plate together. The lower ends of the front support plate and the rear support plate are arranged on the bottom plate 410. The two ends of the second metal piece are respectively abutted against the right end faces of the front support plate and the rear support plate.

[0039] In another embodiment, the machine table 100 is provided with a mounting plate 110. The bottom plate 410 is slidably arranged on the mounting plate 110 in the left-right direction. The lower ends of the front support plate and the rear support plate are arranged on the bottom plate 410. Thus, the right support base 400 is slidably arranged on the machine table 100 in the left-right direction. The distance between the left support base 200 and the right support base 400 can be adjusted. Thus, the welding fixture can be applied to the welding of the shell assembly of the third metal piece with different lengths, i.e. the welding of the shell assembly of the first metal piece and the second metal piece with different distances.

[0040] With reference to Figure 3 , the bottom plate 410 is connected with the mounting plate 110 through a sliding mechanism. The sliding mechanism comprises a limiting slot arranged on the mounting plate 110. The length direction of the limiting slot is the left-right direction. The width of the limiting slot is narrow at the top and wide at the bottom. The sliding mechanism further comprises two limiting blocks. The two limiting blocks are arranged on the front and rear end faces of the bottom plate 410. The two limiting blocks are respectively inserted into the front and rear ends of the limiting slot. The bottom plate 410 is matched with the upper end of the limiting slot. The sliding mechanism limits the bottom plate 410 on the mounting plate 110, so as to avoid the bottom plate 410 from being separated from the mounting plate 110.

[0041] One of the bottom plate 410 and the machine table 100 is provided with an oblong hole 411, and the other is provided with a connecting hole. The length direction of the oblong hole 411 is parallel to the left-right direction. A fastener is arranged in the oblong hole 411 and the connecting hole. When the fastener is tightened, the bottom plate 410 and the machine table 100 are fixed together. When the fastener is loosened, the bottom plate 410 can be moved left and right. Thus, the left-right position of the bottom plate 410 and the whole right support base 400 can be adjusted.

[0042] With reference to Figure 3 , the machine table 100 is provided with a mounting plate 110. The connecting hole penetrates the machine table 100 and the mounting plate 110. The oblong hole 411 is arranged on the bottom plate 410.

[0043] In some embodiments, the right pushing mechanism 500 comprises a first connecting base 510, a sliding rod 520 and a top plate 530. The first connecting base 510 is arranged on the machine table 100. The sliding rod 520 is arranged on the first connecting base 510 and can slide in the left-right direction. The sliding rod 520 is limited on the first connecting base 510 and can only slide in the left-right direction.

[0044] The top plate 530 is connected with the left end of the sliding rod 520. When the sliding rod 520 moves right, the second metal piece is arranged between the top plate 530 and the right supporting base 400. Then, when the sliding rod 520 moves left, the top plate 530 pushes or abuts against the second metal piece on the right supporting base 400.

[0045] Referring to Figure 2 and Figure 3 In some embodiments, the right pushing mechanism 500 further comprises a first handle 540, a first connecting rod 550 and a second connecting rod 560. One end of the first handle 540 is hinged to the first connecting base 510. A middle part of the first handle 540 is provided with a supporting plate 541. One end of the first connecting rod 550 is hinged to the first connecting base 510. One end of the second connecting rod 560 is hinged to the right end of the sliding rod 520. The supporting plate 541, the other end of the first connecting rod 550 and the other end of the second connecting rod 560 are hinged together.

[0046] When the first handle 540 is in a horizontal state, the first connecting rod 550, the second connecting rod 560 and the sliding rod 520 are arranged in sequence from right to left. The length directions of the first connecting rod 550, the second connecting rod 560 and the sliding rod 520 are all in the left-right direction and are in the same straight line. At this time, the sliding rod 520 and the top plate 530 are in the leftmost position. At this time, the top plate 530 is in a state of pushing the second metal piece on the right supporting base 400. When the other end of the first handle 540 swings upward, the other end of the first connecting rod 550 and the other end of the second connecting rod 560 are offset upward, so that the sliding rod 520 and the top plate 530 move right.

[0047] Referring to Figure 3 In some embodiments, the left end of the sliding rod 520 and the top plate 530 are connected in a detachable manner. The top plate 530 can be detached, so that the installation, detachment and replacement of the top plate 530 are facilitated.

[0048] It is conceivable that the two ends of the top plate 530 are respectively forward and backward. The left end of the sliding rod 520 is provided with external threads. The middle segment of the top plate 530 is threadedly connected with a nut. The left end of the sliding rod 520 and the nut are threadedly matched. By rotating the nut, the left-right position of the top plate 530 can be adjusted.

[0049] It can be understood that the right pushing mechanism 500 and the left pushing mechanism 300 are identical in structure, and the left pushing mechanism 300 and the right pushing mechanism 500 are arranged symmetrically left and right. The top plate 530 of the left pushing mechanism 300 can push the first metal piece on the left supporting seat 200.

[0050] With reference to Figure 2 and Figure 4 In some embodiments, the pressing mechanism 600 includes a second connecting seat 610 connected with the left supporting seat 200 / the right supporting seat 400, a swing arm 620 hingedly connected with the second connecting seat 610 at one end, a pressing block 630 connected with the swing arm 620 at the other end, and a second handle 640 connected with the swing arm 620, the second handle 640 being used to drive the swing arm 620 to swing in a plane perpendicular to the left-right direction, so that the pressing block 630 presses downward on the third metal piece or avoids the position directly above the third metal piece. By swinging the second handle 640, the second handle 640 swings the other end of the swing arm 620 and the pressing block 630 to avoid the position directly above the third metal piece, so that the third metal piece can be placed on the first metal piece and the second metal piece from above, and then the second handle 640 is swung in the opposite direction, so that the other end of the swing arm 620 and the pressing block 630 are swung to the position directly above the third metal piece and press downward on the third metal piece.

[0051] In some embodiments, the pressing mechanism 600 further includes a third connecting rod 650 hingedly connected with the middle section of the second handle 640 at one end and hingedly connected with the middle section of the swing arm 620 at the other end, one end of the second handle 640 being hingedly connected with the second connecting seat 610, the first hinge point being between the one end of the second handle 640 and the second connecting seat 610, the second hinge point being between the one end of the swing arm 620 and the second connecting seat 610, the first hinge point being closer to the pressing block 630 than the second hinge point, when the other end of the second handle 640 is swung toward the direction close to the position of the pressing block 630, the other end of the swing arm 620 and the pressing block 630 are swung to the position directly above the third metal piece and press downward on the third metal piece, that is, one side of the pressing block 630 faces downward and presses downward on the third metal piece, and when the other end of the second handle 640 is swung away from the position of the pressing block 630, the other end of the swing arm 620 and the pressing block 630 are swung to avoid the position directly above the third metal piece.

[0052] It can be understood that the position between the left support seat 200 and the right support seat 400 is used to set the third metal piece, and the position between the left support seat 200 and the right support seat 400 is the center, that is, the inner side, and the other area is the outer side. The other end of the second handle 640 swings towards the direction close to the position of the pressing block 630, that is, the other end of the second handle 640 swings upwards and inwards, at this time, the other end of the swing arm 620 and the pressing block 630 swing upwards and inwards, and finally realize downward pressing the third metal piece; the other end of the second handle 640 swings towards the direction away from the position of the pressing block 630, that is, the other end of the second handle 640 swings upwards and outwards, at this time, the other end of the swing arm 620 and the pressing block 630 swing upwards and outwards, and finally realize avoiding the position directly above the third metal piece.

[0053] Referring to Figure 4 In some embodiments, the pressing mechanism 600 further comprises a connecting rod 660, the other end of the swing arm 620 and the pressing block 630 are connected through the connecting rod 660, the connecting rod 660 is perpendicular to the swing arm 620, and one end of the connecting rod 660 is threadedly connected with the pressing block 630.

[0054] The connecting rod 660 is perpendicular to the swing arm 620, so that when the other end of the swing arm 620 swings downwards, one direction of movement of the pressing block 630 is downwards, thereby enabling the pressing block 630 to press the third metal piece. One end of the connecting rod 660 is threadedly connected with the pressing block 630, which can realize dismounting of the pressing block 630 from the connecting rod 660, facilitating installation and replacement of the pressing block 630.

[0055] In some embodiments, the other end of the connecting rod 660 is slidably connected with the other end of the swing arm 620, so as to adjust the distance between the pressing block 630 and the other end of the swing arm 620. An elastic member 670 is arranged between the pressing block 630 and the other end of the swing arm 620, the elastic member 670 forces the pressing block 630 away from the other end of the swing arm 620, and when the pressing block 630 presses the third metal piece, the elastic member 670 is compressed, and the force of the elastic member 670 drives the pressing block 630 to tightly abut against the third metal piece. The elastic member 670 plays a buffering role, which ensures that the pressing block 630 can press the third metal piece while adjusting the pressing force of the pressing block 630 on the third metal piece.

[0056] It can be conceived that the elastic member 670 is a spring, and the spring is sleeved on the connecting rod 660, and the two ends of the spring are respectively abutted against the pressing block 630 and the other end of the swing arm 620.

[0057] Referring to Figure 2 In the embodiment, the left support seat 200 and the right support seat 400 are the same structure and are arranged left-right symmetrically, and the left support seat 200 and the right support seat 400 each have a front support plate and a rear support plate, and the top of the two front support plates and the two rear support plates are each provided with a pressing mechanism 600.

[0058] The technical features of the above embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described, but it is understood that any combination of the technical features is within the scope of the present disclosure as long as the combination does not result in a contradiction.

[0059] Of course, the present application is not limited to the above-described embodiments, and those skilled in the art can make equivalent modifications or replacements without departing from the spirit of the present application. These equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. A mechanical welding fixture, characterized by, The machine table (100) comprises: a left supporting seat (200) and a left pushing mechanism (300), both of which are arranged on the machine table (100), and the left pushing mechanism (300) is used for pushing a first metal piece on the left supporting seat (200); a right supporting seat (400) and a right pushing mechanism (500), both of which are arranged on the machine table (100), the left supporting seat (200) and the right supporting seat (400) are distributed left and right, and the right pushing mechanism (500) is used for pushing a second metal piece on the right supporting seat (400); at least two pressing mechanisms (600), all of which are arranged on the left supporting seat (200) and the right supporting seat (400), and the pressing mechanisms (600) are used for pressing a third metal piece on the first metal piece and the second metal piece, so that the left and right ends of the third metal piece are respectively connected with the upper end of the first metal piece and the upper end of the second metal piece. The right pushing mechanism (500) comprises a first connecting seat (510), a sliding rod (520) and a top plate (530), the first connecting seat (510) is arranged on the machine table (100), the sliding rod (520) is arranged on the first connecting seat (510) and can slide in the left-right direction, and the top plate (530) is connected with the left end of the sliding rod (520) and is used for pushing the second metal piece on the right supporting seat (400).

2. A mechanical welding fixture according to claim 1, characterized in that: The right pushing mechanism (500) further comprises a first handle (540), a first connecting rod (550) and a second connecting rod (560), one end of the first handle (540) is hinged to the first connecting seat (510), a middle part of the first handle (540) is provided with a supporting plate (541), one end of the first connecting rod (550) is hinged to the first connecting seat (510), one end of the second connecting rod (560) is hinged to the right end of the sliding rod (520), the supporting plate (541), the other end of the first connecting rod (550) and the other end of the second connecting rod (560) are hinged together, when the first handle (540) is in a horizontal state, the length directions of the first connecting rod (550), the second connecting rod (560) and the sliding rod (520) are all left-right directions, when the other end of the first handle (540) swings upward, the other end of the first connecting rod (550) and the other end of the second connecting rod (560) are offset upward, so that the sliding rod (520) and the top plate (530) move rightward.

3. A mechanical welding fixture according to claim 2, wherein: The left end of the sliding rod (520) and the top plate (530) are connected in a detachable manner.

4. A mechanical welding fixture according to claim 2 or 3, characterized in that: The right supporting seat (400) is slidably arranged on the machine table (100), so as to adjust the distance between the left supporting seat (200) and the right supporting seat (400).

5. The mechanical welding fixture of claim 1, wherein: ​ 6. A mechanical welding fixture according to claim 5, wherein: The right support base (400) comprises a bottom plate (410), one of the bottom plate (410) and the machine table (100) is provided with an oblong hole (411), and the other is provided with a connecting hole, the length direction of the oblong hole (411) is parallel to the left-right direction, and a fastener is arranged in the oblong hole (411) and the connecting hole.

7. A mechanical welding fixture according to claim 1, wherein: The pressing mechanism (600) comprises a second connecting seat (610), a swing arm (620), a pressing block (630) and a second handle (640), the second connecting seat (610) is connected with the left support base (200) / the right support base (400), one end of the swing arm (620) is hinged to the second connecting seat (610), the other end of the swing arm (620) is connected with the pressing block (630), the second handle (640) is connected with the swing arm (620), the second handle (640) is used for driving the swing arm (620) to swing in a plane perpendicular to the left-right direction, so that the pressing block (630) presses downward the third metal piece or avoids the position directly above the third metal piece.

8. A mechanical welding fixture according to claim 7, characterized in that: The pressing mechanism (600) further comprises a third connecting rod (650), one end of the third connecting rod (650) is hinged to the middle segment of the second handle (640), the other end of the third connecting rod (650) is hinged to the middle segment of the swing arm (620), one end of the second handle (640) is hinged to the second connecting seat (610), the second handle (640) has a first hinge point between one end and the second connecting seat (610), the swing arm (620) has a second hinge point between one end and the second connecting seat (610), the first hinge point is closer to the pressing block (630) than the second hinge point, when the other end of the second handle (640) swings towards the direction close to the pressing block (630), one side surface of the pressing block (630) faces downward and presses the third metal piece.

9. A mechanical welding fixture according to claim 7 or 8, characterized in that: The pressing mechanism (600) further comprises an adapter rod (660), the other end of the swing arm (620) is connected with the pressing block (630) through the adapter rod (660), the adapter rod (660) is perpendicular to the swing arm (620), one end of the adapter rod (660) is threadedly connected with the pressing block (630).

10. A mechanical welding fixture according to claim 9, wherein: The other end of the adapter rod (660) is slidably connected with the other end of the swing arm (620), so as to adjust the distance between the pressing block (630) and the other end of the swing arm (620), an elastic member (670) is arranged between the pressing block (630) and the other end of the swing arm (620), the elastic member (670) forces the pressing block (630) to be away from the other end of the swing arm (620).

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