CN110091045B

CN110091045B - Spot welding device for automobile parts

Info

Publication number: CN110091045B
Application number: CN201910370212.1A
Authority: CN
Inventors: 张�杰; 王丽水; 王硕; 汤柱亮
Original assignee: Hefei Technology College
Current assignee: Hefei Technology College
Priority date: 2019-05-06
Filing date: 2019-05-06
Publication date: 2021-01-15
Anticipated expiration: 2039-05-06
Also published as: CN110091045A

Abstract

The invention discloses an automobile part spot welding device, which relates to the technical field of automobile spot welding and comprises a supporting plate, a spot welding assembly and a spot welding workbench, wherein the spot welding assembly and the spot welding workbench are respectively arranged above the supporting plate in a back-to-front mode, the spot welding assembly comprises rectangular steel, a telescopic cylinder, an upper mounting rod, a lower mounting rod, an upper electrode, a lower electrode and a transformer, the spot welding workbench comprises a sliding rail I, a sliding rail II, a sliding plate I, a sliding plate II and a lifting plate, the spot welding assembly is used for spot welding of automobile parts, the inclination angles of the two electrodes can be adjusted according to the shape characteristics of the automobile parts to be spot welded, the spot welding workbench is used for bearing during spot welding of the automobile parts, and the space distance between the spot welding workbench and the spot welding device can be adjusted according to the shape characteristics. The spot welding device for the automobile parts has the characteristics of simple structure, convenience in adjustment, good adaptability and good practicability.

Description

Spot welding device for automobile parts

Technical Field

The invention relates to the technical field of automobile spot welding, in particular to an automobile part spot welding device.

Background

An automobile accessory is a product that constitutes each unit of an automobile as a whole and serves the automobile. The automobile parts are various in types, people consume more and more automobiles along with the improvement of living standard of people, and the market of the automobile parts is getting larger and larger. Automobile parts manufacturers have also developed rapidly in recent years. Automobile parts, as the basis of the automotive industry, are essential factors supporting the continued healthy development of the automotive industry. At present, when small and irregular automobile parts are subjected to spot welding, the spot welding is generally completed by directly holding and matching by workers, the labor intensity of the workers is increased to a certain degree, and the spot welding is carried out by holding by hands, so that the welding quality of the finally welded automobile parts cannot be guaranteed. Although some auxiliary devices used for spot welding of automobile parts exist at the present stage, the overall adjustability is not high enough, or the adjustment is inconvenient, and the overall adaptability is not good.

The invention with Chinese patent publication No. CN108788597A discloses an adjusting and fixing device for spot welding of automobile parts, which comprises a guide frame, a lifting plate and a motor, wherein two sliding grooves are respectively arranged at two sides of the guide frame, a tooth frame is arranged at the central position of the guide frame, two symmetrically-arranged adjusting sliding grooves are arranged on the upper surface of the lifting plate, two moving transverse plates are arranged between the two symmetrically-arranged adjusting sliding grooves, a first telescopic rod and a second telescopic rod are respectively fixed on the two moving transverse plates, a first limiting sleeve is fixed at the upper end of the first telescopic rod, a second limiting sleeve is fixed at the upper end of the second telescopic rod, a rotating shaft is fixed on an output shaft of the motor, the rotating shaft is inserted into a second transmission box, a second conical tooth is fixed at the tail end of the rotating shaft, the second conical tooth is meshed with the first conical tooth, and the first conical tooth is fixed on the second rotating shaft. The adjusting and fixing device for spot welding of the automobile parts has the advantages of wide spot welding range, high efficiency, suitability for various automobile parts and high working comfort level.

The invention with the Chinese patent publication number of CN107570950A discloses a spot welding auxiliary device for manufacturing a whole automobile, which comprises a bottom plate, wherein the upper surface of the bottom plate is fixedly connected with a rotating shaft, the surface of the rotating shaft is sleeved with a bearing, the bearing is clamped on the lower surface of a shell, the surface of the bearing is sleeved with a driven gear, the driven gear is positioned below the shell and is meshed with a first driving device, and the lower surface of the first driving device is fixedly connected with the upper surface of the bottom plate. This a spot welding auxiliary device for whole car is made, through setting up first motor, the rotatory driving gear that drives of output shaft of first motor is rotatory, the rotatory driven gear that drives of driving gear is rotatory, thereby it is rotatory to drive the casing, the work piece that makes the backup pad top rotates, the spot welding of workman different positions on to the work piece has been made things convenient for, do not need workman's removals electric welding and self position when the spot welding, the time and the physical power of having practiced thrift workman, it is convenient to have brought when the spot welding to the work piece for workman.

Disclosure of Invention

The invention aims to provide a spot welding device for automobile parts, which is used for solving the defects caused in the prior art.

The utility model provides an auto-parts spot welding device, includes backup pad, spot welding subassembly and spot welding workstation lean on the back respectively and lean on the top of locating the backup pad in front, the spot welding subassembly is used for the spot welding to auto-parts, can adjust the inclination of two electrodes according to the shape characteristic of the auto-parts who treats the spot welding, the spot welding workstation bears when being used for auto-parts spot welding, can adjust the space distance of spot welding workstation and spot welding device according to the shape characteristic of the auto-parts who treats the spot welding.

Preferably, the spot welding subassembly includes the rectangle steel, goes up electrode and bottom electrode, the rectangle steel leans on vertical welding in the up end of backup pad in the middle of back, the pivot of orientation around the upper portion of rectangle steel is equipped with, the pivot runs through the rectangle steel and installs on the rectangle steel through bearing frame one, the place ahead of pivot is coaxial to be equipped with the circular shape carousel, through splined connection and for interference fit between pivot and the carousel, the edge coaxial arrangement of the preceding terminal surface of carousel has the ring gear, the mounting panel one of U type is installed to the rectangle steel in the top of carousel, the threaded rod one of orientation around the center department screw thread installation of mounting panel one, the coaxial gear that is equipped with in rear of threaded rod one, through splined connection and for interference fit between threaded rod one and the gear, intermeshing between gear and the ring gear, hand wheel one is installed to the front end of threaded rod one, the front end face of the turntable is provided with a hinged support by means of an upper mounting rod hinged on the hinged support through a pin, the upper electrode is vertically mounted at the overhanging end of the upper mounting rod downwards through a jackscrew, the middle part of the upper mounting rod is fixedly provided with a sleeve, the lower side of the sleeve is vertically welded with a connecting plate, the connecting plate is provided with a vertical chute, the center of the front end face of the turntable is provided with a U-shaped mounting plate II, the mounting plate II is provided with a forward telescopic cylinder, a piston rod of the telescopic cylinder is provided with a connecting block, the connecting block is connected with the chute on the connecting plate through a pin, the front end face of the turntable is provided with a mounting seat by means of a lower mounting rod, the lower electrode is vertically mounted at the overhanging end of the lower mounting rod upwards through a jackscrew, and the right end face of the upper part of the rectangular steel is provided, the transformer is electrically connected with the upper electrode and the lower electrode respectively.

Preferably, the spot welding workbench comprises a first sliding rail, the first sliding rail is uniformly arranged and is installed on the upper end surface of a supporting plate in a front-back direction, a first sliding block is installed on the first sliding rail in a sliding manner, a first sliding plate is installed on the upper end surface of the first sliding block, third installation plates are vertically installed on the left side and the right side of the upper end surface of the first sliding plate, fourth installation plates are installed on the upper end surfaces of the third installation plates, a lifting plate is arranged right above the fourth installation plates, a second threaded rod is installed on the middle part of the fourth installation plates in a threaded manner, the top end of the second threaded rod is installed on the lower end surface of the lifting plate through a second bearing seat, a second hand wheel is installed at the bottom end of the second threaded rod, guide posts are uniformly arranged on the periphery of the second threaded rod, guide sleeves are slidably installed on the guide posts, the top ends of the guide, a second sliding rail is uniformly arranged between the two mounting blocks, a second sliding block is slidably arranged on the second sliding rail, and a second sliding plate is arranged on the upper end face of the second sliding block.

Preferably, the solenoid valve is installed to the rectangle steel in the below of transformer, the solenoid valve passes through the trachea and is connected with telescopic cylinder, the place ahead of backup pad is equipped with foot switch, electric connection between foot switch and the solenoid valve, be equipped with left footboard and right footboard on the foot switch.

Preferably, the first sliding rail is a dovetail-shaped guide rail, and the front end and the rear end of the first sliding rail are respectively provided with a barrier strip facing left and right.

Preferably, a hand-screwed screw is arranged on the sliding plate I in a threaded mode above the sliding rail I, and the lower end face of the hand-screwed screw is in contact with the upper end face of the sliding rail I.

Preferably, quick clamps are uniformly arranged on the upper end face of the second sliding plate, and pressing heads made of rubber are arranged at the pressing ends of the quick clamps.

Preferably, the lower end surface of the supporting plate is uniformly welded with supporting blocks, the lower end surface of each supporting block is welded with a bottom plate, and the lower end surface of each bottom plate is adhered with a vibration reduction friction pad.

The invention has the advantages that: the spot welding device applicable to the automobile parts comprises the following components: the two automobile parts to be spot-welded are placed or fixed on the second sliding plate, the upper electrode is driven to be in contact with the upper surface of the automobile part above through contraction of the piston rod of the telescopic cylinder and transmission, and when enough current passes between the upper electrode and the lower electrode, a welding spot can be formed at the corresponding contact position of the two automobile parts. The inclination degree of the two electrodes can be adjusted by rotating the first hand wheel, so that the spot welding operation of different parts of irregular automobile parts is adapted. The horizontal height of the second sliding plate is adjusted by rotating the second hand wheel, and the first sliding plate is moved forwards and backwards, so that the welding requirements on automobile parts with different shapes and sizes can be met. The spot welding device for the automobile parts has the characteristics of simple structure, convenience in adjustment, good adaptability and good practicability.

Drawings

Fig. 1 is a schematic overall three-dimensional structure of the present invention.

Fig. 2 is a schematic structural diagram of the whole front view of the present invention.

FIG. 3 is a schematic overall side view of the present invention.

Fig. 4 is a schematic overall top view of the present invention.

Fig. 5 is a schematic view of the spot welding assembly.

Fig. 6 is a schematic structural view of the turntable.

Fig. 7 is a schematic structural view of the rotating shaft.

Fig. 8 is a schematic structural diagram of the first screw.

Fig. 9 is a schematic structural view of the gear.

Wherein, 1-a support plate; 2-rectangular steel; 3-a rotating shaft; 301-spline one; 4, bearing seat I; 5, rotating a disc; 501-spline groove one; 6-gear ring; 7, mounting a first plate; 8, a first threaded rod; 801-spline two; 9-gear; 901-spline groove two; 10, a first hand wheel; 11-hinged support; 12-mounting a rod; 13-an upper electrode; 14-a sleeve; 141-a connecting plate; 142-a chute; 15-mounting a second plate; 16-a telescopic cylinder; 17-connecting blocks; 18-a mounting seat; 19-lower mounting bar; 20-a lower electrode; 21-a transformer; 22-a first slide rail; 23-a first slide block; 24-a first sliding plate; 25-mounting a plate III; 26-mounting a plate IV; 27-a lifter plate; 28-a second threaded rod; 29-bearing seat II; 30-a second hand wheel; 31-guide pillar; 32-guide sleeves; 33-a mounting seat; 34-a mounting block; 35-a second slide rail; 36-a second sliding block; 37-sliding plate II; 38-quick clamp; 381-indenter; 39-a support block; 40-a bottom plate; 41-electromagnetic valve; 42-foot switch; 421-left pedal; 422-right pedal; 43-barrier strip; 44-hand screw.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

Example 1

As shown in fig. 1 to 9, an auto-parts spot welding device comprises a supporting plate 1, a spot welding assembly and a spot welding workbench, wherein the spot welding assembly and the spot welding workbench are respectively arranged above the supporting plate 1 by the back and the front, the spot welding assembly is used for spot welding of auto-parts, the inclination angles of two electrodes can be adjusted according to the shape characteristics of the auto-parts to be subjected to spot welding, the spot welding workbench is used for bearing when the auto-parts are subjected to spot welding, and the space distance between the spot welding workbench and the spot welding device can be adjusted according to the shape characteristics of the auto-parts to be subjected to spot welding.

In the invention, the spot welding assembly comprises rectangular steel 2, an upper electrode 13 and a lower electrode 20, the rectangular steel 2 is vertically welded on the upper end surface of a support plate 1 after being centered, a front-back-oriented rotating shaft 3 is arranged on the upper part of the rectangular steel 2, the rotating shaft 3 penetrates through the rectangular steel 2 and is installed on the rectangular steel 2 through a bearing seat I4, a circular turntable 5 is coaxially arranged in front of the rotating shaft 3, the rotating shaft 3 and the turntable 5 are connected through splines and are in interference fit, a gear ring 6 is coaxially installed at the edge of the front end surface of the turntable 5, a U-shaped mounting plate I7 is installed above the turntable 5 on the rectangular steel 2, a front-back-oriented threaded rod I8 is installed at the center of the mounting plate I7 through threads, a gear 9 is coaxially arranged behind the threaded rod I8, and the threaded rod I8 and the gear 9 are connected through splines and are in, intermeshing between gear 9 and the ring gear 6, a hand wheel 10 is installed to the front end of a threaded rod 8, the preceding terminal surface of carousel 5 is by last installing hinged-support 11, hinged-support 11 goes up to articulate through the pin has last installation pole 12, go up electrode 13 and install the overhanging end at last installation pole 12 downwards through the jackscrew is vertical, the middle part fixed mounting who goes up installation pole 12 has sleeve pipe 14, the vertical welding of the downside of sleeve pipe 14 has connecting plate 141, be equipped with vertical spout 142 on connecting plate 141, the center department of the preceding terminal surface of carousel 5 installs two 15 of mounting panel of U type, install preceding telescopic cylinder 16 on two 15 of mounting panel, install connecting block 17 on the piston rod of telescopic cylinder 16, connecting block 17 is connected through the spout 142 on pin and the connecting plate 141, mount pad 18 is installed by the lower to the preceding terminal surface of carousel 5, the mounting base 18 is fixedly provided with a lower mounting rod 19, the lower electrode 20 is vertically and upwardly mounted at the overhanging end of the lower mounting rod 19 through a jackscrew, the right end face of the upper part of the rectangular steel 2 is provided with a transformer 21, and the transformer 21 is respectively and electrically connected with the upper electrode 13 and the lower electrode 20.

In the invention, the spot welding workbench comprises a first slide rail 22, the first slide rail 22 is uniformly arranged on the upper end surface of a support plate 1 in a front-back direction, a first slide block 23 is slidably arranged on the first slide rail 22, a first slide plate 24 is arranged on the upper end surface of the first slide block 23, three mounting plates 25 are vertically arranged on the left side and the right side of the upper end surface of the first slide plate 24, four mounting plates 26 are arranged on the upper end surfaces of the three mounting plates 25, a lifting plate 27 is arranged right above the four mounting plates 26, a second threaded rod 28 is arranged in the middle of the four mounting plates 26 in a threaded manner, the top end of the second threaded rod 28 is arranged on the lower end surface of the lifting plate 27 through a second bearing seat 29, a second hand wheel 30 is arranged at the bottom end of the second threaded rod 28, guide posts 31 are uniformly arranged on the periphery of the second threaded rod 28, guide sleeves 32 are slidably, guide pin bushing 32 is fixed on four 26 of mounting panel, installation piece 34 is installed on both sides about the up end of lifter plate 27, and two 35 of slide rails are installed to the equipartition between two installation pieces 34, slidable mounting has two 36 of slider on two 35 of slide rails, two 37 of slide plates are installed to the up end of two 36 of slider.

In the invention, an electromagnetic valve 41 is installed below the transformer 21 on the rectangular steel 2, the electromagnetic valve 41 is connected with the telescopic cylinder 16 through an air pipe, the action control of the telescopic cylinder 16 is realized through the electromagnetic valve 41, a foot switch 42 is arranged in front of the support plate 1, the foot switch 42 is electrically connected with the electromagnetic valve 41, the action control of the electromagnetic valve 41 is realized through the foot switch 42, a left pedal 421 and a right pedal 422 are arranged on the foot switch 42, when the left pedal 421 is pressed, a piston rod of the telescopic cylinder 16 extends, and when the right pedal 422 is pressed, the piston rod of the telescopic cylinder 16 contracts.

Example 2

In the invention, the slide rail I22 is a dovetail guide rail which has the characteristics of good guidance quality, high guidance precision and strong loading capacity, the front end and the rear end of the slide rail I22 are respectively provided with a barrier strip 43 facing left and right, and the barrier strips 43 can prevent the slide block I23 from sliding out of the slide rail I22.

In the invention, the slide plate I24 is provided with a hand screw 44 in a threaded manner above the slide rail I22, and the lower end surface of the hand screw 44 is in contact with the upper end surface of the slide rail I22. The hand screw 44 can limit the freedom of movement of the first sliding plate 24, and realize the relative fixation between the first sliding plate 24 and the supporting plate 1.

In the invention, the upper end surfaces of the second sliding plates 37 are uniformly provided with the rapid clamps 38, and the pressing ends of the rapid clamps 38 are provided with pressing heads 381 made of rubber. By means of the quick clamp 38, the automobile parts with regular shapes can be clamped, the situation that people need to hold the automobile parts all the time during welding is avoided, and labor intensity of workers is reduced.

In the invention, the supporting blocks 39 are uniformly welded on the lower end surface of the supporting plate 1, the supporting blocks 39 can raise the height of the supporting plate 1 to prevent the supporting plate 1 from directly contacting with the ground, the lower end surface of the supporting blocks 39 is welded with the bottom plate 40, the contact area between the bottom plate 40 and the ground can be increased, the lower end surface of the bottom plate 40 is adhered with a vibration reduction friction pad, and the vibration reduction friction pad can eliminate or reduce the vibration generated by the spot welding device in the using process.

The working principle and the adjusting process of the spot welding device suitable for the automobile parts are as follows:

extension and shortening through telescopic cylinder's piston rod, realize the rising of connecting plate with will down, and then drive the installation pole rise around the hinged-support with will down, and then drive the rising of electrode with will down, put slide two with two auto-parts that wait to weld when the workman, and when the lower terminal surface of the auto-parts that will be located the below contacts with lower electrode, the shrink of the piston rod of rethread telescopic cylinder and through the transmission back, drive lower electrode and the upper surface contact who is located the auto-parts of top, when passing through enough big electric current between last electrode and lower electrode, can form a solder joint in the contact department of two auto-parts's correspondence. The inclination degree of the two electrodes can be adjusted by rotating the first hand wheel, so that the spot welding operation of different parts of irregular automobile parts is adapted. The horizontal height of the second sliding plate is adjusted by rotating the second hand wheel, and the first sliding plate is moved forwards and backwards, so that the welding requirements on automobile parts with different shapes and sizes can be met. When regular automobile parts are welded and welding spots are a straight line, the two automobile parts can be fixed on the second sliding plate through the rapid fixture, and spot welding operation of the two automobile parts can be completed through gap spot welding of the spot welding device and intermittent sliding of the second sliding plate towards one side.

In summary, the spot welding device for automobile parts in the invention: the two automobile parts to be spot-welded are placed or fixed on the second sliding plate, the upper electrode is driven to be in contact with the upper surface of the automobile part above through contraction of the piston rod of the telescopic cylinder and transmission, and when enough current passes between the upper electrode and the lower electrode, a welding spot can be formed at the corresponding contact position of the two automobile parts. The inclination degree of the two electrodes can be adjusted by rotating the first hand wheel, so that the spot welding operation of different parts of irregular automobile parts is adapted. The horizontal height of the second sliding plate is adjusted by rotating the second hand wheel, and the first sliding plate is moved forwards and backwards, so that the welding requirements on automobile parts with different shapes and sizes can be met. The spot welding device for the automobile parts has the characteristics of simple structure, convenience in adjustment, good adaptability and good practicability.

The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.

Claims

1. A spot welding device for automobile parts is characterized in that: comprises a supporting plate (1), a spot welding component and a spot welding workbench, wherein the spot welding component and the spot welding workbench are respectively arranged above the supporting plate (1) in a back-to-back and front-to-front manner,

the spot welding subassembly is used for the spot welding to auto-parts, can be according to the inclination of treating the auto-parts's of spot welding shape characteristic regulation two electrodes, the spot welding subassembly includes rectangle steel (2), last electrode (13) and bottom electrode (20), rectangle steel (2) lean on the up end of back vertical welding in the backup pad (1) between two parties, pivot (3) of orientation around the upper portion of rectangle steel (2) is equipped with, pivot (3) run through rectangle steel (2) and install on rectangle steel (2) through bearing frame (4), the place ahead of pivot (3) is coaxial to be equipped with circular shape carousel (5), through splined connection and for interference fit between pivot (3) and carousel (5), the edge coaxial arrangement of the preceding terminal surface of carousel (5) has ring gear (6), the mounting panel (7) of U type is installed in the top of carousel (5) to rectangle steel (2), the threaded rod (8) of orientation around the central point department threaded mounting of mounting panel (7), the coaxial gear (9) that is equipped with in rear of threaded rod (8), pass through splined connection and be interference fit between threaded rod (8) and gear (9), intermeshing between gear (9) and ring gear (6), hand wheel (10) are installed to the front end of threaded rod (8), the preceding terminal surface of carousel (5) leans on to install hinged-support (11), it has last installation pole (12) to articulate through the pin on hinged-support (11), go up electrode (13) and install the overhanging end at last installation pole (12) down through the jackscrew is vertical, the middle part fixed mounting of going up installation pole (12) has sleeve pipe (14), the vertical welding of the downside of sleeve pipe (14) has connecting plate (141), be equipped with vertical spout (142) on connecting plate (141), the center department of the preceding terminal surface of carousel (5) installs two (15) of mounting panel of U type, install telescopic cylinder (16) forward on two (15) of mounting panel, install connecting block (17) on the piston rod of telescopic cylinder (16), connecting block (17) are connected through spout (142) on pin and connecting plate (141), the preceding terminal surface of carousel (5) leans on down to install mount pad (18), fixed mounting has down installation pole (19) on mount pad (18), down electrode (20) install the overhang end of installing pole (19) under through the jackscrew is vertical upwards, transformer (21) are installed to the right-hand member face on the upper portion of rectangle steel (2), transformer (21) respectively with upper electrode (13) and lower electrode (20) electric connection,

bear when spot welding workstation is used for auto-parts spot welding, can be according to the shape characteristic regulation spot welding workstation and the spatial distance of spot welding device of the auto-parts who treats spot welding, spot welding workstation includes slide rail one (22), the up end at backup pad (1) is installed towards around slide rail one (22) equipartition, slidable mounting has slider one (23) on slide rail one (22), slide one (24) are installed to the up end of slider one (23), the vertical mounting panel three (25) of installing in both sides about the up end of slide one (24), mounting panel four (26) are installed to the up end of two mounting panels three (25), be equipped with lifter plate (27) directly over mounting panel four (26), threaded rod two (28) are installed to the middle part screw thread of mounting panel four (26), the lower terminal surface at lifter plate (27) is installed through bearing frame two (29) on the top of threaded rod two (28), a second hand wheel (30) is installed at the bottom end of the second threaded rod (28), guide posts (31) are uniformly arranged on the periphery of the second threaded rod (28), guide sleeves (32) are slidably installed on the guide posts (31), the top ends of the guide posts (31) are installed on the lower end face of the lifting plate (27) through installation seats (33), the guide sleeves (32) are fixed on a fourth installation plate (26), installation blocks (34) are installed on the left side and the right side of the upper end face of the lifting plate (27), a second sliding rail (35) is uniformly installed between the two installation blocks (34), a second sliding block (36) is slidably installed on the second sliding rail (35), and a second sliding plate (37) is installed on the upper end face of the second sliding block (36).

2. The spot welding device for automobile parts according to claim 1, wherein: solenoid valve (41) are installed in the below of transformer (21) in rectangular steel (2), solenoid valve (41) are connected with telescopic cylinder (16) through the trachea, the place ahead of backup pad (1) is equipped with foot switch (42), electric connection between foot switch (42) and solenoid valve (41), be equipped with left footboard (421) and right footboard (422) on foot switch (42).

3. The spot welding device for automobile parts according to claim 1, wherein: the first sliding rail (22) is a dovetail-shaped guide rail, and the front end and the rear end of the first sliding rail (22) are respectively provided with a blocking strip (43) which faces left and right.

4. The spot welding device for automobile parts according to claim 1, wherein: and a hand screw (44) is arranged on the sliding plate I (24) above the sliding rail I (22) in a threaded manner, and the lower end face of the hand screw (44) is in contact with the upper end face of the sliding rail I (22).

5. The spot welding device for automobile parts according to claim 1, wherein: quick anchor clamps (38) are installed to the up end equipartition of slide two (37), the end that compresses tightly of quick anchor clamps (38) is equipped with pressure head (381) that rubber was made.

6. The spot welding device for automobile parts according to claim 1, wherein: supporting blocks (39) are uniformly welded on the lower end face of the supporting plate (1), a bottom plate (40) is welded on the lower end face of each supporting block (39), and a vibration reduction friction pad is pasted on the lower end face of each bottom plate (40).