CN212578131U

CN212578131U - Welding production line for automobile front axle welding piece

Info

Publication number: CN212578131U
Application number: CN202020317182.6U
Authority: CN
Inventors: 谢小东
Original assignee: Liuzhou Changhong Aerospace Technology Co ltd
Current assignee: Liuzhou Changhong Aerospace Technology Co ltd
Priority date: 2020-01-20
Filing date: 2020-03-14
Publication date: 2021-02-23
Anticipated expiration: 2030-03-14
Also published as: CN111496364A

Abstract

The utility model provides an automobile front axle seam piece welding production line, includes welding workstation No. 1, welding workstation No. 2 and sets up the drive belt between welding workstation, A station, B station, C station and D station to and the welding robot that corresponds the setting, welding robot receives PLC control system control, and No. 1 anchor clamps, No. 2 anchor clamps, No. 3 anchor clamps and No. 4 anchor clamps that set up on the station are equipped with positioning mechanism and hold-down mechanism who receives PLC control system control respectively. The welding production line is high in automation degree, high in clamp positioning accuracy, stable and reliable in compression welding quality, capable of reducing operators, effectively reducing clamping auxiliary time, greatly improving production efficiency, convenient to adapt to industrial mass production and manufacturing, capable of reducing labor intensity of workers and improving production safety.

Description

Welding production line for automobile front axle welding piece

Technical Field

The utility model relates to an automobile parts welded automation line especially relates to an automobile front axle seam piece welding production line.

Background

The automobile front axle welded part is an important part of an automobile, and comprises the following components: front axle crossbeam, crossbeam shrouding seam piece, left socle seam piece and right branch frame seam piece, the corresponding position of left socle seam piece and right branch frame seam piece fixed at the front axle crossbeam is fixed respectively in the production process, welds and obtains the semi-manufactured goods of front axle crossbeam, then fixes the corresponding position of the semi-manufactured goods of front axle crossbeam with crossbeam shrouding seam piece at the front axle crossbeam, welds the resistance welding process of accomplishing whole front axle seam piece once more to obtain front axle seam piece finished product.

The traditional manual suspension resistance welding is that a common manual quick pressing device and pneumatic clamping are mixed to position and compress the parts, and finally, the resistance welding tongs are held by hands to weld the positioned and compressed front shaft welding piece; there are problems in that:

1. the part clamping time is long, the production efficiency is low, and the method is not suitable for industrialized mass production and manufacturing;

2. the labor cost is high, and the labor intensity of workers is high;

3. the consistency of the hand-held welding is poor, the welding quality is unstable, and the rejection rate is high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an automobile front axle seam piece welding production line to overcome the above-mentioned not enough that prior art exists.

The utility model adopts the technical proposal that: a welding production line for a front axle welding piece of an automobile comprises a No. 1 welding workstation, a No. 2 welding workstation, a PLC control system and a transmission belt arranged between the welding workstations, wherein the No. 1 welding workstation comprises an A station and a B station, the A station is correspondingly provided with a No. 1 fixture and a No. 1 welding robot, the B station is correspondingly provided with a No. 2 fixture and a No. 2 welding robot, the No. 2 welding workstation comprises a C station and a D station, the C station is correspondingly provided with a No. 3 fixture and a No. 3 welding robot, the D station is correspondingly provided with a No. 4 fixture and a No. 4 welding robot, the No. 1 welding robot, the No. 2 welding robot, the No. 3 welding robot and the No. 4 welding robot are electrically connected with the PLC control system, the No. 1 clamp, the No. 2 clamp, the No. 3 clamp and the No. 4 clamp are respectively provided with a positioning mechanism and a pressing mechanism which are connected with the PLC control system;

no. 1 weldment work station is used for accomplishing the welding of front axle crossbeam and left and right support seam piece, the drive belt is used for transporting the weldment work piece that No. 1 weldment work station was accomplished to No. 2 weldment work stations, No. 2 weldment work stations are used for accomplishing the weldment work piece that No. 1 weldment work station was accomplished and the welding of shrouding seam piece, wherein:

the No. 1 clamp of the station A is used for clamping and positioning the left and right bracket welding pieces and the front shaft beam for the first time for welding by a No. 1 welding robot; the No. 2 clamp of the station B is used for carrying out secondary clamping and positioning on the welded finished part of the station A, avoiding the clamping position of the No. 1 clamp of the station A, and enabling the No. 2 welding robot to weld the part of the station A which cannot be welded due to the blocking interference of the No. 1 clamp, and finally completing the welding of the front axle beam and the left and right bracket welding parts;

the No. 3 clamp of the C station is used for carrying out primary clamping and positioning on the finished piece and the sealing plate welding piece of the No. 1 welding workstation for welding by a No. 3 welding robot; no. 4 anchor clamps of D station are used for carrying out the centre gripping location of second time to the completion after the welding of C station to dodge the clamping position of No. 3 anchor clamps of C station, supply No. 4 welding robot to weld the position that can not accomplish the welding because No. 3 anchor clamps block to interfere to the C station, and the whole welding of final completion front axle seam piece obtains the front axle crossbeam seam piece.

The further technical scheme is as follows: the No. 1 clamp comprises a front shaft beam pressing mechanism, a support welding part positioning pressing mechanism and a swing arm hole position positioning mechanism which are arranged on a clamp base; the front axle beam pressing mechanism comprises a beam left pressing mechanism I and a beam right pressing mechanism I; the crossbeam left pressing mechanism I is used for pressing the left part of a front axle crossbeam, and the crossbeam right pressing mechanism I is used for pressing the right part of the front axle crossbeam; the support welding piece positioning and pressing mechanism is arranged at four corners of the clamp base and comprises a left support front positioning and pressing mechanism I, a left support rear positioning and pressing mechanism I, a right support front positioning and pressing mechanism I and a right support rear positioning and pressing mechanism I; the left support front positioning and pressing mechanism I is used for positioning a front hole with the diameter of 15.5mm of a left support welding part and pressing the front part of the left support welding part, the left support rear positioning and pressing mechanism I is used for positioning a rear hole with the diameter of 13mm of the left support welding part and pressing the rear part of the left support welding part, and the left support front positioning and pressing mechanism I is matched to realize the positioning and pressing of the left support welding part; the right support front positioning and pressing mechanism I is used for positioning a 15.8 x 13mm front elliptical hole of a right support welding piece and pressing the front part of the right support welding piece, the right support rear positioning and pressing mechanism I is used for positioning a 15.8 x 15mm rear elliptical hole of the right support welding piece and pressing the rear part of the right support welding piece, and the right support front positioning mechanism I is matched to realize the positioning and pressing of the right support welding piece;

the swing arm hole position positioning mechanism comprises a swing arm hole left front positioning mechanism I, a swing arm hole left rear positioning mechanism I, a swing arm hole right front positioning mechanism I and a swing arm hole right rear positioning mechanism I; the swing arm hole left front positioning mechanism I is used for coaxially positioning a front swing arm hole of the left support welding piece and a front swing arm hole of the front shaft cross beam, the swing arm hole left rear positioning mechanism I is used for coaxially positioning a rear swing arm hole of the left support welding piece and a rear swing arm hole of the front shaft cross beam, and the relative position between the left support welding piece and the front shaft cross beam is fixed by matching with the swing arm hole left front positioning mechanism I; the swing arm hole right front positioning mechanism I is used for coaxially positioning a front swing arm hole of the right support welding piece and a front swing arm hole of the front shaft cross beam, the swing arm hole right rear positioning mechanism I is used for coaxially positioning a rear swing arm hole of the right support welding piece and a rear swing arm hole of the front shaft cross beam, and the swing arm hole right front positioning mechanism I is matched to fix the relative position between the right support welding piece and the front shaft cross beam;

the No. 2 clamp comprises a cross beam pressing mechanism II, a left support rear pressing mechanism II and a right support front pressing mechanism II, wherein the cross beam pressing mechanism II is installed on a clamp base and is used for single-arm pressing, and the cross beam pressing mechanism II is installed in the middle of the clamp base and is used for pressing the middle of a front shaft cross beam; the left support rear pressing mechanism II and the right support front pressing mechanism II are arranged in a diagonal pressing mode, the left support rear pressing mechanism II is arranged at the left rear part of the clamp base and used for pressing the rear part of the left support welding piece, and the right support front pressing mechanism II is arranged at the right front part of the clamp base and used for pressing the front part of the right support welding piece;

the No. 3 clamp comprises a support welding part positioning and pressing mechanism, a swing arm hole position positioning mechanism and a sealing plate welding part positioning and pressing mechanism III which are arranged on a clamp base; the support welding piece positioning and pressing mechanisms are arranged at four corners of the clamp base and comprise a left support front positioning and pressing mechanism III, a left support rear positioning and pressing mechanism III, a right support front positioning and pressing mechanism III and a right support rear positioning and pressing mechanism III; the left support front positioning and pressing mechanism III is used for positioning a front hole with the diameter of 15.5mm of the left support welding part and pressing the front part of the left support welding part, the left support rear positioning and pressing mechanism III is used for positioning a rear hole with the diameter of 13mm of the left support welding part and pressing the rear part of the left support welding part, and the left support front positioning and pressing mechanism III is matched to press the left support welding part, so that the left support welding part is prevented from displacing in the welding process to influence the welding quality; the right bracket front positioning and pressing mechanism III is used for positioning a 15.8X 13mm front elliptical hole of the right bracket welding piece and pressing the front part of the right bracket welding piece, the right bracket rear positioning and pressing mechanism III is used for positioning a 15.8X 15mm rear elliptical hole of the right bracket welding piece and pressing the rear part of the right bracket welding piece, and the right bracket welding piece is pressed by matching with the right bracket front positioning and pressing mechanism III, so that the right bracket welding piece is prevented from displacing in the welding process to influence the welding quality;

the swing arm hole position positioning mechanism comprises a swing arm hole left front positioning mechanism III, a swing arm hole left rear positioning mechanism III, a swing arm hole right front positioning mechanism III and a swing arm hole right rear positioning mechanism III; the swing arm hole left front positioning mechanism III is used for positioning a left front swing arm hole of the left support welding piece, and ensures that the welding deformation of the welding piece does not influence the coaxial positions of the front swing arm hole and the rear swing arm hole; the swing arm hole left rear positioning mechanism III is used for positioning a left rear swing arm hole of the left support welding piece, and ensures that the welding deformation of the welding piece does not influence the coaxial positions of the front swing arm hole and the rear swing arm hole; the swing arm hole right front positioning mechanism III is used for positioning a right front swing arm hole of a right bracket welding piece, and ensures that the welding deformation of the welding piece does not influence the coaxial positions of the front swing arm hole and the rear swing arm hole; the swing arm hole right rear positioning mechanism III is used for positioning a right front swing arm hole of a right bracket welding piece, and ensures that the welding deformation of the welding piece does not influence the coaxial positions of the front swing arm hole and the rear swing arm hole;

the sealing plate welding piece positioning and pressing mechanism III is positioned on the sealing plate welding piece pressing arm and used for positioning and pressing the sealing plate welding piece, so that the clamping fit clearance and the size position of the sealing plate welding piece and the welding piece meet the design requirements;

the No. 4 clamp comprises a left support front positioning mechanism IV, a right support rear positioning mechanism IV, a sealing plate welding piece left pressing mechanism IV and a sealing plate welding piece right pressing mechanism IV which are arranged on a clamp base;

a left support front positioning mechanism IV and a right support rear positioning mechanism IV are arranged in a diagonal pressing mode and are used for carrying out diagonal positioning on a welding piece finished at a station C, the left support label positioning mechanism IV is arranged at the left front part of the clamp base, the right support front positioning mechanism IV is arranged at the right rear part of the clamp base,

shrouding seam left hold-down mechanism IV and shrouding seam right hold-down mechanism IV are used for fixing the shrouding seam, guarantee that the shrouding seam does not take place the displacement and influence the quality in welding process.

Further: the No. 1 clamp; the crossbeam left pressing mechanism I comprises a crossbeam left pressing cylinder I, a crossbeam left pressing arm I and a crossbeam left pressing base I; the crossbeam right pressing mechanism I is the same as the crossbeam left pressing mechanism I in structure and comprises a crossbeam right pressing cylinder I, a crossbeam right pressing arm I and a crossbeam right pressing base I; the swing arm hole left front positioning mechanism I comprises a swing arm hole left front positioning cylinder I, a swing arm hole left front fixing plate I and a swing arm hole left front positioning pin I; the swing arm hole right front positioning mechanism I is the same as the swing arm hole left front positioning mechanism I in structure and comprises a swing arm hole right front positioning cylinder I, a swing arm hole right front fixing plate I and a swing arm hole right front positioning pin I; the swing arm hole left rear positioning mechanism I comprises a swing arm hole left rear positioning cylinder I, a swing arm hole left rear fixing plate I and a swing arm hole left rear positioning pin I; the swing arm hole right rear positioning mechanism I is identical to the swing arm hole left rear positioning mechanism I in structure and comprises a swing arm hole right rear positioning cylinder I, a swing arm hole right rear fixing plate I and a swing arm hole right rear positioning pin I;

the left support front positioning and compressing mechanism I comprises a left support front compressing cylinder I, a left support front pressing arm I, a left support front compressing and fixing plate I and a left support front compressing and positioning pin I; when the device is used, a front hole with the diameter of 15.5mm of the left support welding piece is positioned through the left support front positioning pin I, and the front part of the left support welding piece is pressed through the left support front pressing cylinder I, the left support front pressing arm I and the left support front pressing fixing plate I;

the right support front positioning and pressing mechanism I is the same as the left support front positioning and pressing mechanism I in structure and comprises a right support front pressing cylinder I, a right support front pressing arm I, a right support front pressing fixing plate I and a right support front pressing positioning pin I; when the device is used, a 15.8 mm by 13mm front elliptical hole of the right bracket welding piece is positioned through the right bracket front pressing positioning pin I, and the front part of the right bracket welding piece is pressed through the right bracket front pressing cylinder I, the right bracket front pressing arm I and the right bracket front pressing fixing plate I;

the left support rear positioning and compressing mechanism I comprises a left support rear compressing cylinder I, a left support rear pressing arm I, a left support rear compressing fixing plate I and a left support rear compressing positioning pin I; when the left support rear pressing arm pressing device is used, a phi 13mm rear hole of a left support welding piece is positioned through a left support rear positioning pin I, and the rear part of the left support welding piece is pressed through a left support rear pressing cylinder I, a left support rear pressing arm I and a left support rear pressing fixing plate I;

the right support rear positioning and compressing mechanism I is the same as the left support rear positioning and compressing mechanism I in structure and comprises a right support rear compressing cylinder I, a right support rear pressing arm I, a right support rear compressing fixing plate I and a right support rear positioning pin I; when the device is used, a rear elliptical hole of 15.8 mm multiplied by 15mm of the right bracket welding piece is positioned through the right bracket rear positioning pin I, and the rear part of the right bracket welding piece is pressed through the right bracket rear pressing cylinder I, the right bracket rear pressing arm I and the right bracket rear pressing fixing plate I;

in the No. 2 jig: the crossbeam pressing mechanism II comprises a crossbeam pressing cylinder II, a crossbeam pressing arm II and a crossbeam pressing and positioning base II; the left support rear pressing mechanism II comprises a left support rear pressing air cylinder II, a left support rear pressing arm II, a left support rear pressing positioning base II and a left support rear pressing positioning pin II; the right support front pressing mechanism II comprises a right support front pressing air cylinder II, a right support front pressing arm II, a right support front pressing positioning base II and a right support front pressing positioning pin II;

in the No. 3 jig: shrouding seam location hold-down mechanism III includes: the welding piece pressing cylinder III, the welding piece pressing arm III, the welding piece pressing base III and the welding piece positioning pin module III are arranged on the welding piece pressing base III;

the left support front positioning and pressing mechanism III comprises a left support front pressing cylinder III, a left support front pressing arm and a left support front pressing armPressing tightlyWhen the fixing plate is used, a phi 15.5mm front hole of a left support welding piece is positioned through the left support front positioning pin III, and a left support front pressing arm and a left support front pressing cylinder III are usedPressing tightlyThe fixing plate III compresses the front part of the left bracket welding part;

the left support rear positioning and pressing mechanism III comprises a left support rear pressing cylinder III, a left support rear pressing arm III and a left support rear pressing armPressing tightlyWhen the left support rear positioning pin III is used, a phi 13mm rear hole of a left support welding piece is positioned through the left support rear positioning pin III, and the left support rear pressing air cylinder III, the left support rear pressing arm III and the left support rear pressing arm III are pressed through the left support rear pressing air cylinder IIIPressing tightlyThe fixing plate III compresses the rear part of the left bracket welding part;

the right support front positioning and pressing mechanism III comprises a right support front pressing air cylinder III, a right support front pressing arm III, a right support front pressing fixing plate III and a right support front positioning pin III, when the right support front positioning mechanism is used, a front elliptical hole of 15.8 multiplied by 13mm of a right support welding piece is positioned through the right support front positioning pin III, and the front part of the right support welding piece is pressed through the right support front pressing air cylinder III, the right support front pressing arm III and the right support front pressing fixing plate III;

the right support rear positioning and compressing mechanism III comprises a right support rear compressing air cylinder III, a right support rear compressing arm III, a right support rear compressing fixing plate I and a right support rear compressing positioning pin III, when the right support rear compressing mechanism is used, a 15.8 x 15mm rear elliptical hole of a right support welding piece is positioned through the right support rear compressing positioning pin III, and the rear part of the right support welding piece is compressed through the right support rear compressing air cylinder III, the right support rear compressing arm III and the right support rear compressing fixing plate I;

in the No. 4 jig: the left support front positioning mechanism IV comprises a left front connecting plate positioning pin IV and a left support front positioning base IV, and the right support rear positioning mechanism IV is the same as the left support front positioning mechanism IV in structure and comprises: a right rear connecting plate positioning pin IV and a right bracket rear positioning base IV;

the sealing plate welding piece left pressing mechanism IV comprises a sealing plate welding piece left pressing cylinder IV, a sealing plate welding piece left pressing arm IV and a sealing plate welding piece left pressing base IV; shrouding seam right hold-down mechanism IV is the same with seam left hold-down mechanism IV structure, includes: and the sealing plate welding piece right pressing cylinder IV, the sealing plate welding piece right pressing arm IV and the sealing plate welding piece right pressing base IV.

Owing to take above-mentioned technical scheme, hang resistance welding anchor clamps with the tradition manual work and compare, the utility model relates to an automobile front axle seam piece welding production line has following beneficial effect:

1. the utility model relates to a welding production line of a front axle welding piece of an automobile, because the structure of a No. 2 clamp is similar to that of a No. 1 clamp, the difference lies in that a swing arm hole site positioning mechanism is simplified and cancelled, a left support pressing mechanism and a right support pressing mechanism are changed into a diagonal pressing mode from a four-corner pressing mode, a left support front pressing mechanism and a right support rear pressing mechanism are also cancelled, a beam pressing mechanism of the No. 1 clamp is a left symmetrical double-arm pressing mechanism, a beam pressing mechanism of the No. 2 clamp is a single-arm middle pressing mechanism, so as to avoid the clamping part of the No. 1 clamp, (similarly, the structure of the No. 4 clamp is similar to that of the No. 3 clamp, the difference lies in that the swing arm hole site positioning mechanism and the front axle beam sealing plate welding piece positioning pressing mechanism are simplified and cancelled, the left support positioning mechanism and the right support positioning mechanism are changed into the diagonal positioning mode from the four, the pressing positions of the left and right pressing mechanisms of the welding part of the No. 4 clamp and the pressing positions of the left and right pressing mechanisms of the beam of the No. 3 clamp are staggered), so that the welding of the second clamping is not interfered, and the efficiency and the welding quality are improved;

2. the utility model relates to an automobile front axle seam piece welding production line, through PLC control system control welding jig with automobile front axle seam piece automatic clamping location, clamp tightly, then supply the robot welding, simplified the clamping step, practice thrift the clamping assistance time, improve production efficiency, reducible operating personnel again, reduce workman intensity of labour; the clamping and error-preventing function is realized, the safety is greatly improved, and the safety cost which is possibly input is reduced;

3. the utility model relates to an automobile front axle seam piece welding production line, which is characterized in that welding and clamping beats are reasonably distributed by a workstation mode according to the layout of a production line form, the production waiting time between working procedures is further eliminated, and an automatic control clamp is matched and combined with a welding robot, thereby being beneficial to realizing industrial automatic batch production;

4. the utility model relates to an automobile front axle seam piece welding production line, product welding quality is more stable than manual welding, and the uniformity is good, and the rejection rate is extremely low.

The technical features of a welding line for front axle welded parts of an automobile according to the present invention will be further described with reference to the accompanying drawings and embodiments.

Drawings

FIG. 1 is a schematic layout view of a welding production line for a front axle assembly of an automobile according to the present invention;

FIG. 2 is a schematic structural view (three-dimensional effect) of the No. 1 clamp;

FIG. 3 is a schematic structural view (three-dimensional effect) of the No. 2 clamp;

FIG. 4 is a schematic structural view (three-dimensional effect) of the No. 3 clamp;

FIG. 5 is a schematic structural view of the No. 4 clamp (three-dimensional effect);

fig. 6-7 are schematic structural diagrams of a left bracket front pressing mechanism I:

FIG. 6 is a top view, and FIG. 7 is a perspective view;

fig. 8 to 9 are schematic structural views of a left bracket front positioning mechanism i: FIG. 8 is a side view, and FIG. 9 is a perspective view;

fig. 10 to 11 are schematic structural diagrams of a left bracket front pressing mechanism i:

FIG. 10 is a top view, and FIG. 11 is a perspective view;

fig. 12-13 are schematic structural views of a left bracket rear positioning mechanism i:

FIG. 12 is a front view and FIG. 13 is a side view;

fig. 14-15 are schematic structural diagrams of a beam left pressing mechanism i:

FIG. 14 is a front view and FIG. 15 is a side view;

fig. 16-17 are schematic structural diagrams of a beam right pressing mechanism i:

FIG. 16 is a front view, and FIG. 17 is a perspective view;

fig. 18 to 19 are schematic structural views of a right bracket front positioning mechanism i:

FIG. 18 is a top view, and FIG. 19 is a perspective view;

fig. 20 to 21 are schematic structural diagrams of a right bracket front pressing mechanism i:

FIG. 20 is a perspective view, and FIG. 21 is a top view;

fig. 22 to 23 are schematic structural views of a rear positioning mechanism i of a right bracket:

FIG. 22 is a front view, and FIG. 23 is a perspective view;

fig. 24-25 are schematic structural diagrams of the right bracket rear pressing mechanism i:

FIG. 24 is a front view, and FIG. 25 is a top view;

fig. 26 to 27 are schematic structural diagrams of the rear pressing mechanism ii of the left bracket:

FIG. 26 is a front view, and FIG. 27 is a perspective view;

fig. 28 to 29 are schematic structural diagrams of the beam pressing mechanism ii:

fig. 28 is a front view, and fig. 29 is a perspective view;

fig. 30 to 31 are schematic structural views of a right bracket front pressing mechanism ii:

FIG. 30 is a front view, and FIG. 31 is a perspective view;

fig. 32 to 33 are schematic structural views of a left bracket front pressing mechanism iii:

FIG. 32 is a front view, and FIG. 33 is a perspective view;

fig. 34 to 35 are schematic structural views of a left bracket front positioning mechanism iii:

FIG. 34 is a front view, and FIG. 35 is a perspective view;

fig. 36 to 37 are schematic structural views of the left bracket rear positioning mechanism iii:

FIG. 36 is a front view, and FIG. 37 is a perspective view;

fig. 38 to 39 are schematic structural views of the left bracket rear pressing mechanism iii:

fig. 38 is a perspective view, and fig. 39 is a plan view;

fig. 40 to 41 are schematic structural views of a sealing plate welding piece positioning and pressing mechanism iii:

FIG. 40 is a front view, and FIG. 41 is a perspective view;

fig. 42 to 43 are schematic structural views of a right bracket front positioning mechanism iii:

FIG. 42 is a top view, and FIG. 43 is a perspective view;

fig. 44 to 45 are schematic structural views of a right bracket front pressing mechanism iii:

fig. 44 is a perspective view, and fig. 45 is a plan view;

fig. 46 to 47 are schematic structural views of the right bracket rear positioning mechanism iii:

FIG. 46 is a front view, and FIG. 47 is a perspective view;

fig. 48 to 49 are schematic structural views of the right bracket rear pressing mechanism iii:

FIG. 48 is a front view and FIG. 49 is a top view;

fig. 50 to 51 are schematic structural views of a left bracket front positioning mechanism iv:

FIG. 50 is a front view, and FIG. 51 is a perspective view;

fig. 52-53 are schematic structural diagrams of a left pressing mechanism iv of a welded part:

FIG. 52 is a front view, and FIG. 53 is a side view;

fig. 54 to 55 are schematic structural views of a right pressing mechanism iv of a welded part:

FIG. 54 is a front view, and FIG. 55 is a perspective view;

fig. 56-57 are schematic structural views of a right bracket rear positioning mechanism iv:

fig. 56 is a front view, and fig. 57 is a side view;

fig. 58 to 62 are schematic structural views of the welded workpiece:

fig. 58 is a front axle beam, fig. 59 is a left leg weldment, fig. 60 is a right leg weldment, fig. 61 is a beam seal plate weldment, and fig. 62 is a welded front axle weldment.

In the figure:

1-1 clamp, 2-2 clamp, 3-3 clamp, 4-4 clamp, 5-control box, 101-1 welding robot, 102-2 welding robot, 103-3 welding robot, 104-4 welding robot, 105-operation panel, 106-drive belt, 107-guardrail, 6-front axle beam, 7-beam sealing plate welding piece, 81-left support welding piece, 82-right support welding piece, 9-front axle welding piece;

10-left support front positioning hold-down mechanism I: 1001-left bracket front pressing cylinder I, 1002-left bracket front pressing arm I, 1003-left bracket front pressing fixing plate I and 1004-left bracket front positioning pin I;

11-swing arm hole left front positioning mechanism I: 1101-a swing arm hole left front positioning cylinder I, 1102-a swing arm hole left front fixing plate I and 1103-a swing arm hole left front positioning pin I;

12-swing arm hole left rear positioning mechanism I: 1201-swing arm hole left rear positioning cylinder I, 1202-swing arm hole left rear fixing plate I, 1203-swing arm hole left rear positioning pin I;

13-left support rear positioning hold-down mechanism I: 1301-a left support rear pressing cylinder I, 1302-a left support rear pressing arm I, 1303-a left support rear pressing fixing plate I and 1304-a left support rear positioning pin I;

14-left hold-down mechanism of crossbeam I: 1401-beam left pressing cylinder I, 1402-beam left pressing arm I, 1403-beam left pressing base I,

15-right hold-down mechanism of crossbeam I: 1501-beam right pressing cylinder I, 1502-beam right pressing arm I and 1503-beam right pressing base I;

16-swing arm hole right front positioning mechanism I: 1601-swing arm hole right front positioning cylinder I, 1602-swing arm hole right front fixing plate I and 1603-swing arm hole right front positioning pin I;

17-right support front positioning hold-down mechanism I: 1701-a right support front compaction cylinder I, 1702-a right support front compaction arm I, 1703-a right support front compaction fixing plate I and 1704-a right support front positioning pin I;

18-rear positioning mechanism I behind swing arm hole: 1801-swing arm hole right rear positioning cylinder I, 1802-swing arm hole right rear fixing plate I and 1803-swing arm hole right rear positioning pin I;

19-right support rear positioning hold-down mechanism I: 1901-right bracket rear pressing cylinder I, 1902-right bracket rear pressing arm I, 1903-right bracket rear pressing fixing plate I, 1904-right bracket rear positioning pin I;

20-left bracket rear hold-down mechanism II: 2001-left support rear pressing cylinder II, 2002-left support rear pressing arm II, 2003-left support rear pressing positioning base II and 2004-left support rear positioning pin II;

21-beam hold-down mechanism II: 2101-beam pressing cylinder II, 2102-beam pressing arm II and 2103-beam pressing positioning base II;

22-right bracket front hold-down mechanism II: 2201-a right bracket front pressing cylinder II, 2202-a right bracket front pressing arm II, 2203-a right bracket front pressing positioning base II and 2204-a right bracket front positioning pin II;

30-left support front positioning and pressing mechanism III (the structure is the same as 10): 3001-a left bracket front pressing cylinder III, 3002-a left bracket front pressing fixing plate III, 3003-a left bracket front pressing arm III and 3004-a left bracket front positioning pin III;

31-swing arm hole left front positioning mechanism III (the structure is the same as 11): 3101, a swing arm hole left front positioning cylinder III, 3102, a swing arm hole left front fixing plate III and a 3103, a swing arm hole left front positioning pin III;

32-swing arm hole left rear positioning mechanism III (the structure is the same as 12): 3201-a swing arm hole left rear positioning cylinder III, 3202-a swing arm hole left rear fixing plate III and 3203-a swing arm hole left rear positioning pin III;

33-left support rear positioning and pressing mechanism III (the structure is the same as 13): 3301-left support rear pressing cylinder III, 3302-left support rear pressing arm III, 3303-left support rear pressing fixing plate III, 3304-left support rear positioning pin III;

34-a sealing plate welding piece positioning and pressing mechanism III: 3401-a welding part pressing cylinder III, 3402-a welding part pressing arm III, 3403-a welding part pressing base III and 3404-a welding part positioning pin module III;

35-swing arm hole right front positioning mechanism III (the structure is the same as 16): 3501-swing arm hole right front positioning cylinder III, 3502-swing arm hole right front fixing plate III, 3503-swing arm hole right front positioning pin III;

36-right support front positioning and pressing mechanism III (the structure is the same as 17): 3601-a right bracket front pressing cylinder III, 3602-a right bracket front pressing arm, 3603-a right bracket front pressing fixing plate III and 3604-a right bracket front positioning pin III;

37-rear positioning mechanism III (the structure is the same as 18): 3701-a swing arm hole right rear positioning cylinder III, 3702-a swing arm hole right rear fixing plate III and 3703-a swing arm hole right rear positioning pin III;

38-right support rear positioning hold-down mechanism III: 3801-right bracket rear pressing air cylinder III, 3802-right bracket rear pressing arm III, 3803-right bracket rear pressing fixing plate III and 3804-right bracket rear positioning pin III;

40-left support front positioning mechanism IV: 4001-left front connecting plate positioning pins IV, 4002-left support front positioning base IV;

43-right support rear positioning mechanism IV: 4301-right rear connecting plate positioning pin IV, 4302-right support rear positioning base IV.

41-closing plate welded part left hold-down mechanism IV: 4101-a sealing plate welding part left pressing cylinder IV, 4102-a sealing plate welding part left pressing arm IV and 4103-a sealing plate welding part left pressing base IV;

42-closing plate welding piece right pressing mechanism IV: 4201-sealing plate welding piece right pressing cylinder IV, 4202-sealing plate welding piece right pressing arm IV and 4203-sealing plate welding piece right pressing base IV.

Detailed Description

A welding production line for a front axle welding piece of an automobile comprises a No. 1 welding workstation, a No. 2 welding workstation, a PLC control system and a transmission belt arranged between the welding workstations, wherein the No. 1 welding workstation comprises an A station and a B station, the A station is correspondingly provided with a No. 1 fixture and a No. 1 welding robot, the B station is correspondingly provided with a No. 2 fixture and a No. 2 welding robot, the No. 2 welding workstation comprises a C station and a D station, the C station is correspondingly provided with a No. 3 fixture and a No. 3 welding robot, the D station is correspondingly provided with a No. 4 fixture and a No. 4 welding robot, the No. 1 welding robot, the No. 2 welding robot, the No. 3 welding robot and the No. 4 welding robot are electrically connected with the PLC control system, the No. 1 clamp, the No. 2 clamp, the No. 3 clamp and the No. 4 clamp are respectively provided with a positioning mechanism and a pressing mechanism which are connected with the PLC control system;

The No. 1 clamp comprises a front shaft beam pressing mechanism, a support welding part positioning pressing mechanism and a swing arm hole position positioning mechanism which are arranged on a clamp base; the front axle beam pressing mechanism comprises a beam left pressing mechanism I14 and a beam right pressing mechanism I15; the beam left pressing mechanism I14 is used for pressing the left part of the front shaft beam to ensure that the front shaft beam is tightly matched with the left support welding part; the beam right pressing mechanism I15 is used for pressing the right part of the front shaft beam to ensure that the front shaft beam is tightly matched with the right bracket welding piece;

the support welding part positioning and pressing mechanism is arranged at four corners of the clamp base and comprises a left support front positioning and pressing mechanism I10, a left support rear positioning and pressing mechanism I13, a right support front positioning and pressing mechanism I17 and a right support rear positioning and pressing mechanism I19; the left support front positioning and pressing mechanism I10 is used for positioning a front hole with the diameter of 15.5mm of a left support welding part and pressing the front part of the left support welding part, the left support rear positioning and pressing mechanism I13 is used for positioning a rear hole with the diameter of 13mm of the left support welding part and pressing the rear part of the left support welding part, and the left support front positioning and pressing mechanism I is matched to realize the positioning and pressing of the left support welding part; the right support front positioning and pressing mechanism I17 is used for positioning a 15.8 x 13mm front elliptical hole of a right support welding piece and pressing the front part of the right support welding piece, the right support rear positioning and pressing mechanism I19 is used for positioning a 15.8 x 15mm rear elliptical hole of the right support welding piece and pressing the rear part of the right support welding piece, and the right support front positioning mechanism I is matched to realize the positioning and pressing of the right support welding piece;

the swing arm hole position positioning mechanism comprises a swing arm hole left front positioning mechanism I11, a swing arm hole left rear positioning mechanism I12, a swing arm hole right front positioning mechanism I16 and a swing arm hole right rear positioning mechanism I18; the swing arm hole left front positioning mechanism I11 is used for coaxially positioning a front swing arm hole of the left support welding piece and a front swing arm hole of the front shaft cross beam, the swing arm hole left rear positioning mechanism I12 is used for coaxially positioning a rear swing arm hole of the left support welding piece and a rear swing arm hole of the front shaft cross beam, and the relative position between the left support welding piece and the front shaft cross beam is fixed by matching with the swing arm hole left front positioning mechanism I; the swing arm hole right front positioning mechanism I16 is used for coaxially positioning a front swing arm hole of the right bracket welding piece and a front swing arm hole of the front shaft cross beam, the swing arm hole right rear positioning mechanism I18 is used for coaxially positioning a rear swing arm hole of the right bracket welding piece and a rear swing arm hole of the front shaft cross beam, and the relative position between the right bracket welding piece and the front shaft cross beam is fixed by matching with the swing arm hole right front positioning mechanism I;

the No. 2 clamp comprises a cross beam pressing mechanism II 21, a left support rear pressing mechanism II 20 and a right support front pressing mechanism II 22 which are arranged on a clamp base, wherein the cross beam pressing mechanism II is used for single-arm pressing and is arranged in the middle of the clamp base and used for pressing the middle part of a front shaft cross beam; the left support rear pressing mechanism II 20 and the right support front pressing mechanism II 22 are arranged in a diagonal pressing mode, the left support rear pressing mechanism II is arranged at the left rear part of the clamp base and used for pressing the rear part of the left support welding piece, and the right support front pressing mechanism II is arranged at the right front part of the clamp base and used for pressing the front part of the right support welding piece;

the No. 3 clamp comprises a bracket welding part positioning and pressing mechanism, a swing arm hole position positioning mechanism and a sealing plate welding part positioning and pressing mechanism III 34 which are arranged on a clamp base, the structure of the No. 1 clamp is basically the same as that of the No. 1 clamp, except that a beam left pressing mechanism 14 and a beam right pressing mechanism 15 are eliminated, a sealing plate welding part positioning and pressing mechanism III 34 is added,

the support welding part positioning and pressing mechanisms are arranged at four corners of the clamp base and comprise a left support front positioning and pressing mechanism III 30, a left support rear positioning and pressing mechanism III 33, a right support front positioning and pressing mechanism III 36 and a right support rear positioning and pressing mechanism III 38; the left support front positioning and pressing mechanism III 30 is used for positioning a front hole with the diameter of 15.5mm of the left support welding part and pressing the front part of the left support welding part, the left support rear positioning and pressing mechanism III 33 is used for positioning a rear hole with the diameter of 13mm of the left support welding part and pressing the rear part of the left support welding part, and the left support front positioning and pressing mechanism III is matched to press the left support welding part, so that the welding quality is not influenced by the fact that the left support welding part does not displace in the welding process;

the right bracket front positioning and pressing mechanism III 36 is used for positioning a 15.8X 13mm front elliptical hole of the right bracket welding piece and pressing the front part of the right bracket welding piece, the right bracket rear positioning and pressing mechanism III 38 is used for positioning a 15.8X 15mm rear elliptical hole of the right bracket welding piece and pressing the rear part of the right bracket welding piece, and the right bracket welding piece is pressed by matching with the right bracket front positioning and pressing mechanism III 36, so that the right bracket welding piece is prevented from displacing in the welding process to influence the welding quality;

the swing arm hole position positioning mechanism comprises a swing arm hole left front positioning mechanism III 31, a swing arm hole left rear positioning mechanism III 32, a swing arm hole right front positioning mechanism III 35 and a swing arm hole right rear positioning mechanism III 37;

the swing arm hole left front positioning mechanism III 31 is used for positioning a left front swing arm hole of the left support welding piece, and ensures that the welding deformation of the welding piece does not influence the coaxial positions of the front swing arm hole and the rear swing arm hole; the swing arm hole left rear positioning mechanism III 32 is used for positioning the left rear swing arm hole of the left support welding piece, and ensures that the welding deformation of the welding piece does not influence the coaxial positions of the front swing arm hole and the rear swing arm hole; the swing arm hole right front positioning mechanism III 35 is used for positioning a right front swing arm hole of the right bracket welding piece, and ensures that the welding deformation of the welding piece does not influence the coaxial positions of the front swing arm hole and the rear swing arm hole;

the swing arm hole right rear positioning mechanism III 37 is used for positioning a right front swing arm hole of a right bracket welding piece, and ensures that the welding deformation of the welding piece does not influence the coaxial position of the front swing arm hole and the rear swing arm hole; the sealing plate welding piece positioning and pressing mechanism III 34 is positioned on the sealing plate welding piece pressing arm and used for positioning and pressing the sealing plate welding piece, and the clamping fit clearance and the size position of the sealing plate welding piece and the welding piece are ensured to meet the design requirements;

the No. 4 clamp comprises a left support front positioning mechanism IV 40, a right support rear positioning mechanism IV 43, a sealing plate welding piece left pressing mechanism IV 41 and a sealing plate welding piece right pressing mechanism IV 42 which are arranged on a clamp base; the left support front positioning mechanism IV 40 and the right support rear positioning mechanism IV 43 are arranged in a diagonal pressing mode and used for carrying out diagonal positioning on a welded part finished at a C station, the left support label positioning mechanism IV is installed at the left front part of the clamp base, the right support front positioning mechanism IV is installed at the right rear part of the clamp base, the sealing plate welded part left pressing mechanism IV 41 and the sealing plate welded part right pressing mechanism IV 42 are used for fixing the sealing plate welded part, and the quality is guaranteed not to be influenced by displacement of the sealing plate welded part in the welding process.

The No. 1 clamp; the crossbeam left pressing mechanism I14 comprises a crossbeam left pressing cylinder I1401, a crossbeam left pressing arm I1402 and a crossbeam left pressing base I1403; the crossbeam right pressing mechanism I15 is identical to the crossbeam left pressing mechanism I14 in structure and comprises a crossbeam right pressing cylinder I1501, a crossbeam right pressing arm I1502 and a crossbeam right pressing base I1503; the swing arm hole left front positioning mechanism I11 comprises a swing arm hole left front positioning cylinder I1101, a swing arm hole left front fixing plate I1102 and a swing arm hole left front positioning pin I1103; the swing arm hole right front positioning mechanism I16 is identical to the swing arm hole left front positioning mechanism I11 in structure and comprises a swing arm hole right front positioning cylinder I1601, a swing arm hole right front fixing plate I1602 and a swing arm hole right front positioning pin I1603; the swing arm hole left rear positioning mechanism I12 comprises a swing arm hole left rear positioning cylinder I1201, a swing arm hole left rear fixing plate I1202 and a swing arm hole left rear positioning pin I1203; the swing arm hole right rear positioning mechanism I18 is identical to the swing arm hole left rear positioning mechanism I12 in structure and comprises a swing arm hole right rear positioning cylinder I1801, a swing arm hole right rear fixing plate I1802 and a swing arm hole right rear positioning pin I1803;

the left bracket front positioning and pressing mechanism I10 comprises a left bracket front pressing cylinder I1001, a left bracket front pressing arm I1002, a left bracket front pressing fixing plate I1003 and a left bracket front pressing positioning pin I1004; when the device is used, a front hole with the diameter of 15.5mm of the left support welding piece is positioned through the left support front positioning pin I, and the front part of the left support welding piece is pressed through the left support front pressing cylinder I, the left support front pressing arm I and the left support front pressing fixing plate I;

the right support front positioning and pressing mechanism I17 is identical to the left support front positioning and pressing mechanism I10 in structure and comprises a right support front pressing cylinder I1701, a right support front pressing arm I1702, a right support front pressing fixing plate I1703 and a right support front pressing positioning pin I1704; when the device is used, a 15.8 mm by 13mm front elliptical hole of the right bracket welding piece is positioned through the right bracket front pressing positioning pin I, and the front part of the right bracket welding piece is pressed through the right bracket front pressing cylinder I, the right bracket front pressing arm I and the right bracket front pressing fixing plate I;

the left support rear positioning and pressing mechanism I13 comprises a left support rear pressing cylinder I1301, a left support rear pressing arm I1302, a left support rear pressing fixing plate I1303 and a left support rear pressing positioning pin I1304; when the left support rear pressing arm pressing device is used, a phi 13mm rear hole of a left support welding piece is positioned through a left support rear positioning pin I, and the rear part of the left support welding piece is pressed through a left support rear pressing cylinder I, a left support rear pressing arm I and a left support rear pressing fixing plate I;

the right bracket rear positioning and compacting mechanism I19 is identical in structure to the left bracket rear positioning and compacting mechanism I13 and comprises a right bracket rear compacting cylinder I1901, a right bracket rear pressing arm I1902, a right bracket rear compacting fixing plate I1903 and a right bracket rear positioning pin I1904; when the device is used, a rear elliptical hole of 15.8 mm multiplied by 15mm of the right bracket welding piece is positioned through the right bracket rear positioning pin I, and the rear part of the right bracket welding piece is pressed through the right bracket rear pressing cylinder I, the right bracket rear pressing arm I and the right bracket rear pressing fixing plate I;

in the No. 2 jig: the crossbeam pressing mechanism II 21 comprises a crossbeam pressing cylinder II 2101, a crossbeam pressing arm II 2102 and a crossbeam pressing positioning base II 2103; the left support rear pressing mechanism II 20 comprises a left support rear pressing cylinder II 2001, a left support rear pressing arm II 2002, a left support rear pressing positioning base II 2003 and a left support rear pressing positioning pin II 2004; the right bracket front pressing mechanism II 22 comprises a right bracket front pressing cylinder II 2201, a right bracket front pressing arm II 2202, a right bracket front pressing positioning base II 2203 and a right bracket front pressing positioning pin II 2204;

in the No. 3 jig: the closing plate welding part positioning and pressing mechanism III 34 comprises: the welding part pressing cylinder III 3401, the welding part pressing arm III 3402, the welding part pressing base III 3403 and the welding part positioning pin module III 3404 are arranged in the welding part pressing cylinder;

the left bracket front positioning and pressing mechanism III 30 comprises a left bracket front pressing cylinder III 3001, a left bracket front pressing arm 3002 and a left bracket front pressing armPressing tightlyThe fixing plate III 3003 and the left support front positioning pin III 3004 are used for positioning a phi 15.5mm front hole of a left support welding piece through the left support front positioning pin III during use, and the left support front pressing cylinder III, the left support front pressing arm and the left support front pressing arm are used for pressing the left support frontPressing tightlyThe fixing plate III compresses the front part of the left bracket welding part;

the left bracket rear positioning and pressing mechanism III 33 comprises a left bracket rear pressing cylinder III 3301, a left bracket rear pressing arm III 3302 and a left bracket rear pressing armPressing tightlyWhen the fixing plate III 3303 and the left support rear positioning pin III 3304 are used, a phi 13mm rear hole of a left support welding piece is positioned through the left support rear positioning pin III, and the left support rear pressing cylinder III, the left support rear pressing arm III and the left support rear pressing arm III are pressed through the left support rear pressing cylinder IIIPressing tightlyThe fixing plate III compresses the rear part of the left bracket welding part;

the right support front positioning and pressing mechanism III 36 comprises a right support front pressing cylinder III 3601, a right support front pressing arm III 3602, a right support front pressing fixing plate III 3603 and a right support front positioning pin III 3604, when the right support front positioning mechanism is used, a front elliptical hole of 15.8 multiplied by 13mm of a right support welding piece is positioned through a right support front positioning pin III, and the front part of the right support welding piece is pressed through the right support front pressing cylinder III, the right support front pressing arm III and the right support front pressing fixing plate III 3603;

the right bracket rear positioning and pressing mechanism III 38 comprises a right bracket rear pressing cylinder III 3801, a right bracket rear pressing arm III 3802, a right bracket rear pressing fixing plate III 3803 and a right bracket rear pressing positioning pin III 3804, when the right bracket rear pressing mechanism is used, a rear elliptical hole of 15.8 multiplied by 15mm of a right bracket welding piece is positioned through the right bracket rear pressing positioning pin III, and the rear part of the right bracket welding piece is pressed through the right bracket rear pressing cylinder III, the right bracket rear pressing arm III and the right bracket rear pressing fixing plate I;

in the No. 4 jig: the left support front positioning mechanism IV 40 comprises: a left front connecting plate positioning pin IV 4001 and a left support front positioning base IV 4002, wherein the right support rear positioning mechanism IV 43 is the same in structure as the left support front positioning mechanism IV 40 and comprises: a right rear connecting plate positioning pin IV 4301 and a right bracket rear positioning base IV 4302;

the sealing plate welding part left pressing mechanism IV 41 comprises: a sealing plate welding part left pressing cylinder IV 4101, a sealing plate welding part left pressing arm IV 4102 and a sealing plate welding part left pressing base IV 4103; the shrouding seam piece right hold-down mechanism IV 42 is the same with seam piece left hold-down mechanism IV structure, includes: a sealing plate welding part right pressing cylinder IV 4201, a sealing plate welding part right pressing arm IV 4202 and a sealing plate welding part right pressing base IV 4203.

The utility model relates to an automobile front axle seam piece welding production line flow step is as follows:

firstly, respectively sleeving a left support welding piece on a left support front positioning and pressing mechanism I10 and a left support rear positioning and pressing mechanism I13 on a No. 1 welding robot workstation A station fixture, sleeving a right support welding piece on a right support front positioning and pressing mechanism I17 and a right support rear positioning and pressing mechanism I19, and positioning the left support welding piece and the right support welding piece with a front shaft beam through the left support welding piece positioning and pressing mechanism and a swing arm hole site positioning mechanism; starting a PLC control system, setting a PLC to control a left support front positioning and pressing mechanism I10, a left support welding piece rear positioning and pressing mechanism I13, a right support welding piece front positioning and pressing mechanism I17, a right support welding piece rear positioning and pressing mechanism I19, a swing arm hole right front positioning mechanism I16, a swing arm hole right rear positioning mechanism I (18), a swing arm hole position left front positioning mechanism I11, a swing arm hole position left rear positioning mechanism I12, a beam left pressing mechanism I14 and a beam right pressing mechanism I15 to start clamping and positioning work, automatically opening and taking a workpiece by a set PLC control clamp clamping part after welding is completed, and switching to the next process;

the second step, lay the seam piece that No. 1 anchor clamps were accomplished at No. 2 anchor clamps of No. 1 welding robot workstation B station respectively at the location fixture of No. 2 anchor clamps: starting a PLC control system on a rear pressing mechanism II 20 of the left support welding part and a front pressing mechanism II 22 of the right support welding part, setting a PLC to control a beam pressing mechanism II 21, a rear pressing mechanism II 20 of the left support and a front pressing mechanism II 22 of the right support to clamp and press, automatically opening and taking a workpiece by a clamp clamping part controlled by the set PLC after welding is completed, completing welding work of a welding robot workstation No. 1, and then transferring to a welding robot workstation No. 2 through a conveyor belt;

thirdly, placing the welded part finished by the No. 2 clamp on a left support welded part rear positioning and pressing mechanism III 30, a left support welded part front positioning and pressing mechanism III 33, a right support welded part rear positioning and pressing mechanism III 36 and a right support welded part front positioning and pressing mechanism III 38 respectively by a No. 2 welding robot workstation C station No. 3 clamp, and positioning and clamping the sealed plate welded part and the welded part through a sealed plate welded part positioning and pressing mechanism III 34;

starting a PLC control system, controlling a left support welding part rear positioning and pressing mechanism III 30, a left support welding part front positioning and pressing mechanism III 33, a sealing plate welding part positioning and pressing mechanism III 34, a right support welding part rear positioning and pressing mechanism III 36 and a right support welding part front positioning and pressing mechanism III 38 by PLC, starting clamping and positioning work by a swing arm hole rear positioning mechanism III 37, a swing arm hole front positioning mechanism III 37, a swing arm hole rear left positioning mechanism III 31, a swing arm hole front left positioning mechanism III 32, a swing arm hole front positioning mechanism I11, a swing arm hole rear left positioning mechanism I12, automatically opening and taking a workpiece by a set PLC control clamp clamping part after welding is finished, and switching to a D-station clamp No. 4;

fourthly, respectively placing the welding piece finished by the No. 3 clamp on a front positioning mechanism IV 40 of the left support and a rear positioning mechanism IV 43 of the right support of the No. 4 clamp on a No. 4 clamp of a D station of the No. 2 welding robot workstation; when the welding fixture is started externally, the PLC controls the left pressing mechanism IV 41 of the sealing plate welding part and the right pressing mechanism IV 42 of the sealing plate welding part to start clamping and positioning work, and the PLC controls the clamping part of the fixture to be automatically opened and taken after welding is completed, so that a welding task is completed.

Claims

1. The utility model provides an automobile front axle seam piece welding production line which characterized in that: the welding machine comprises a welding workstation No. 1, a welding workstation No. 2, a PLC control system and a transmission belt arranged between the welding workstations, wherein the welding workstation No. 1 comprises a station A and a station B, the station A is correspondingly provided with a fixture No. 1 and a welding robot No. 1, the station B is correspondingly provided with a fixture No. 2 and a welding robot No. 2, the welding workstation No. 2 comprises a station C and a station D, the station C is correspondingly provided with a fixture No. 3 and a welding robot No. 3, the station D is correspondingly provided with a fixture No. 4 and a welding robot No. 4, the welding robot No. 1, the welding robot No. 2, the welding robot No. 3 and the welding robot No. 4 are electrically connected with the PLC control system, and the fixture No. 1, the fixture No. 2, the fixture No. 3 and the fixture No. 4 are respectively provided with a positioning mechanism and a pressing mechanism which are connected;

2. The welding production line for the automobile front axle weldment according to claim 1, characterized in that:

the No. 1 clamp comprises a front shaft beam pressing mechanism, a support welding part positioning pressing mechanism and a swing arm hole position positioning mechanism which are arranged on a clamp base;

front axle crossbeam hold-down mechanism includes crossbeam left hold-down mechanism I (14) and crossbeam right hold-down mechanism I (15): the crossbeam left pressing mechanism I (14) is used for pressing the left part of the front axle crossbeam, and the crossbeam right pressing mechanism I (15) is used for pressing the right part of the front axle crossbeam;

the support welding part positioning and pressing mechanisms are arranged at four corners of the clamp base and comprise a left support front positioning and pressing mechanism I (10), a left support rear positioning and pressing mechanism I (13), a right support front positioning and pressing mechanism I (17) and a right support rear positioning and pressing mechanism I (19); the left support front positioning and pressing mechanism I (10) is used for positioning a front hole with the diameter of 15.5mm of a left support welding piece and pressing the front part of the left support welding piece, the left support rear positioning and pressing mechanism I (13) is used for positioning a rear hole with the diameter of 13mm of the left support welding piece and pressing the rear part of the left support welding piece, the left support front positioning and pressing mechanism I is matched to realize the positioning and pressing of the left support welding piece, the right support front positioning and pressing mechanism I (17) is used for positioning a front elliptical hole with the diameter of 15.8 x 13mm of the right support welding piece and pressing the front part of the right support welding piece, the right support rear positioning and pressing mechanism I (19) is used for positioning a rear elliptical hole with the diameter of 15.8 x 15mm of the right support welding piece and pressing the rear part of the right support welding piece, and the right support front positioning and pressing mechanism I is matched to realize;

the swing arm hole position positioning mechanism comprises a swing arm hole left front positioning mechanism I (11), a swing arm hole left rear positioning mechanism I (12), a swing arm hole right front positioning mechanism I (16) and a swing arm hole right rear positioning mechanism I (18); the left front positioning mechanism I (11) of a swing arm hole is used for coaxially positioning a front swing arm hole of a left support welding piece and a front swing arm hole of a front shaft cross beam, the left rear positioning mechanism I (12) of the swing arm hole is used for coaxially positioning a rear swing arm hole of the left support welding piece and a rear swing arm hole of the front shaft cross beam, the left front positioning mechanism I of the swing arm hole is matched for fixing the relative position between the left support welding piece and the front shaft cross beam, the right front positioning mechanism I (16) of the swing arm hole is used for coaxially positioning a front swing arm hole of a right support welding piece and a front swing arm hole of the front shaft cross beam, the right rear positioning mechanism I (18) of the swing arm hole is used for coaxially positioning a rear swing arm hole of the right support welding piece and a rear swing arm hole of the front shaft cross beam, and the right front positioning mechanism I of the swing arm hole is matched for fixing the;

the No. 2 clamp comprises a cross beam pressing mechanism II (21), a left support rear pressing mechanism II (20) and a right support front pressing mechanism II (22) which are arranged on a clamp base; the cross beam pressing mechanism II is used for single-arm pressing and is arranged in the middle of the clamp base and used for pressing the middle part of a front shaft cross beam, the left support rear pressing mechanism II (20) and the right support front pressing mechanism II (22) are arranged in a diagonal pressing mode, the left support rear pressing mechanism II is arranged at the left rear part of the clamp base and used for pressing the rear part of the left support welding piece, and the right support front pressing mechanism II is arranged at the right front part of the clamp base and used for pressing the front part of the right support welding piece;

the No. 3 clamp comprises a bracket welding piece positioning and pressing mechanism, a swing arm hole position positioning mechanism and a sealing plate welding piece positioning and pressing mechanism III (34) which are arranged on a clamp base; the support welding part positioning and pressing mechanisms are arranged at four corners of the clamp base and comprise a left support front positioning and pressing mechanism III (30), a left support rear positioning and pressing mechanism III (33), a right support front positioning and pressing mechanism III (36) and a right support rear positioning and pressing mechanism III (38); the left bracket front positioning and pressing mechanism III (30) is used for positioning a front hole with the diameter of 15.5mm of a left bracket welding piece and pressing the front part of the left bracket welding piece, the left bracket rear positioning and pressing mechanism III (33) is used for positioning a rear hole with the diameter of 13mm of the left bracket welding piece and pressing the rear part of the left bracket welding piece, the left bracket welding piece is pressed by matching with the left bracket front positioning and pressing mechanism III to ensure that the left bracket welding piece does not displace in the welding process to influence the welding quality, the right bracket front positioning and pressing mechanism III (36) is used for positioning a front elliptical hole with the diameter of 15.8 multiplied by 13mm of the right bracket welding piece and pressing the front part of the right bracket welding piece, the right bracket rear positioning and pressing mechanism III (38) is used for positioning a rear elliptical hole with the diameter of 15.8 multiplied by 15mm of the right bracket welding piece and pressing the rear part of the right bracket welding piece, and the right bracket front positioning and pressing mechanism III (36) is matched with, the welding quality is not influenced by the fact that the right bracket welding piece does not displace in the welding process;

the swing arm hole position positioning mechanism comprises a swing arm hole left front positioning mechanism III (31), a swing arm hole left rear positioning mechanism III (32), a swing arm hole right front positioning mechanism III (35) and a swing arm hole right rear positioning mechanism III (37); the swing arm hole left front positioning mechanism III (31) is used for positioning a left front swing arm hole of a left support welding piece to ensure that the welding deformation of the welding piece does not influence the coaxial positions of the front and rear swing arm holes, the swing arm hole left rear positioning mechanism III (32) is used for positioning a left rear swing arm hole of the left support welding piece to ensure that the welding deformation of the welding piece does not influence the coaxial positions of the front and rear swing arm holes, and the swing arm hole right front positioning mechanism III (35) is used for positioning a right front swing arm hole of a right support welding piece to ensure that the welding deformation of the welding piece does not influence the coaxial positions of the front and rear swing arm holes; the swing arm hole right rear positioning mechanism III (37) is used for positioning a right front swing arm hole of a right bracket welding piece to ensure that the welding deformation of the welding piece does not influence the coaxial positions of the front swing arm hole and the rear swing arm hole;

the sealing plate welding piece positioning and pressing mechanism III (34) is positioned on the sealing plate welding piece pressing arm and used for positioning and pressing the sealing plate welding piece, and the clamping fit clearance and the size position of the sealing plate welding piece and the welding piece are ensured to meet the design requirements;

the No. 4 clamp comprises a left support front positioning mechanism IV (40), a right support rear positioning mechanism IV (43), a sealing plate welding piece left pressing mechanism IV (41) and a sealing plate welding piece right pressing mechanism IV (42) which are arranged on a clamp base; the left support front positioning mechanism IV (40) and the right support rear positioning mechanism IV (43) are arranged in a diagonal pressing mode and used for carrying out diagonal positioning on a welding piece finished at a station C, the left support front positioning mechanism IV is arranged at the left front part of the clamp base, and the right support front positioning mechanism IV is arranged at the right rear part of the clamp base; and the sealing plate welding piece left pressing mechanism IV (41) and the sealing plate welding piece right pressing mechanism IV (42) are used for fixing the sealing plate welding piece, so that the sealing plate welding piece is not displaced in the welding process to influence the quality.

3. The welding production line for the automobile front axle weldment according to claim 2, characterized in that:

the No. 1 clamp; the crossbeam left pressing mechanism I (14) comprises a crossbeam left pressing cylinder I (1401), a crossbeam left pressing arm I (1402) and a crossbeam left pressing base I (1403); the crossbeam right pressing mechanism I (15) and the crossbeam left pressing mechanism I (14) are identical in structure and comprise a crossbeam right pressing cylinder I (1501), a crossbeam right pressing arm I (1502) and a crossbeam right pressing base I (1503); the swing arm hole left front positioning mechanism I (11) comprises a swing arm hole left front positioning cylinder I (1101), a swing arm hole left front fixing plate I (1102) and a swing arm hole left front positioning pin I (1103); the swing arm hole right front positioning mechanism I (16) is the same as the swing arm hole left front positioning mechanism I (11) in structure and comprises a swing arm hole right front positioning cylinder I (1601), a swing arm hole right front fixing plate I (1602) and a swing arm hole right front positioning pin I (1603); the swing arm hole left rear positioning mechanism I (12) comprises a swing arm hole left rear positioning cylinder I (1201), a swing arm hole left rear fixing plate I (1202) and a swing arm hole left rear positioning pin I (1203); the swing arm hole right rear positioning mechanism I (18) is identical to the swing arm hole left rear positioning mechanism I (12) in structure and comprises a swing arm hole right rear positioning cylinder I (1801), a swing arm hole right rear fixing plate I (1802) and a swing arm hole right rear positioning pin I (1803);

the left bracket front positioning and pressing mechanism I (10) comprises a left bracket front pressing cylinder I (1001), a left bracket front pressing arm I (1002), a left bracket front pressing fixing plate I (1003) and a left bracket front pressing positioning pin I (1004); when the device is used, a front hole with the diameter of 15.5mm of the left support welding piece is positioned through the left support front positioning pin I, and the front part of the left support welding piece is pressed through the left support front pressing cylinder I, the left support front pressing arm I and the left support front pressing fixing plate I;

the right support front positioning and pressing mechanism I (17) is the same as the left support front positioning and pressing mechanism I (10) in structure and comprises a right support front pressing cylinder I (1701), a right support front pressing arm I (1702), a right support front pressing fixing plate I (1703) and a right support front pressing positioning pin I (1704); when the device is used, a 15.8 mm by 13mm front elliptical hole of the right bracket welding piece is positioned through the right bracket front pressing positioning pin I, and the front part of the right bracket welding piece is pressed through the right bracket front pressing cylinder I, the right bracket front pressing arm I and the right bracket front pressing fixing plate I;

the left support rear positioning and pressing mechanism I (13) comprises a left support rear pressing cylinder I (1301), a left support rear pressing arm I (1302), a left support rear pressing fixing plate I (1303) and a left support rear pressing positioning pin I (1304); when the left support rear pressing arm pressing device is used, a phi 13mm rear hole of a left support welding piece is positioned through a left support rear positioning pin I, and the rear part of the left support welding piece is pressed through a left support rear pressing cylinder I, a left support rear pressing arm I and a left support rear pressing fixing plate I;

the right bracket rear positioning and pressing mechanism I (19) is identical to the left bracket rear positioning and pressing mechanism I (13) in structure and comprises a right bracket rear pressing cylinder I (1901), a right bracket rear pressing arm I (1902), a right bracket rear pressing fixing plate I (1903) and a right bracket rear positioning pin I (1904); when the device is used, a rear elliptical hole of 15.8 mm multiplied by 15mm of a right bracket welding piece is positioned through a right bracket rear positioning pin I (1904), and the rear part of the right bracket welding piece is pressed through a right bracket rear pressing cylinder I, a right bracket rear pressing arm I (1902) and a right bracket rear pressing fixing plate I (1903);

in the No. 2 jig: the crossbeam pressing mechanism II (21) comprises a crossbeam pressing cylinder II (2101), a crossbeam pressing arm II (2102) and a crossbeam pressing positioning base II (2103); the left support rear pressing mechanism II (20) comprises a left support rear pressing cylinder II (2001), a left support rear pressing arm II (2002), a left support rear pressing positioning base II (2003) and a left support rear pressing positioning pin II (2004); the right support front pressing mechanism II (22) comprises a right support front pressing cylinder II (2201), a right support front pressing arm II (2202), a right support front pressing positioning base II (2203) and a right support front pressing positioning pin II (2204);

in the No. 3 jig: the closing plate welding part positioning and pressing mechanism III (34) comprises: the welding part pressing cylinder III (3401), the welding part pressing arm III (3402), the welding part pressing base III (3403) and the welding part positioning pin module III (3404);

the left bracket front positioning and pressing mechanism III (30) comprises a left bracket front pressing air cylinder III (3001), a left bracket front pressing arm (3002) and a left bracket front pressing armPressing tightlyFixing plate III (3003) and left socle preceding locating pin III (3004), during the use fix a position the preceding hole of phi 15.5mm of left socle weldment through left socle preceding locating pin III, compress tightly cylinder III, left socle preceding pressure arm and left socle preceding through left soclePressing tightlyThe fixing plate III compresses the front part of the left bracket welding part;

left socle rear location hold-down mechanism III (33) compress tightly cylinder III (3301) behind including left socle, left socle rear pressure arm III (3302), left socle rear pressure arm IIIPressing tightlyWhen the fixing plate is used, a phi 13mm rear hole of a left support welding piece is positioned through the left support rear positioning pin III, and the left support rear pressing cylinder III, the left support rear pressing arm III and the left support rear pressing arm III are pressed through the left supportPressing tightlyThe fixing plate III compresses the rear part of the left bracket welding part;

the right bracket front positioning and pressing mechanism III (36) comprises a right bracket front pressing cylinder III (3601), a right bracket front pressing arm III (3602), a right bracket front pressing fixing plate III (3603) and a right bracket front positioning pin III (3604), when the right bracket front positioning mechanism is used, a front elliptical hole of 15.8 multiplied by 13mm of a right bracket welding piece is positioned through the right bracket front positioning pin III, and the front part of the right bracket welding piece is pressed through the right bracket front pressing cylinder III, the right bracket front pressing arm III and the right bracket front pressing fixing plate III (3603);

the right bracket rear positioning and pressing mechanism III (38) comprises a right bracket rear pressing air cylinder III (3801), a right bracket rear pressing arm III (3802), a right bracket rear pressing fixing plate III (3803) and a right bracket rear pressing positioning pin III (3804), when the right bracket rear pressing mechanism is used, a rear elliptical hole of 15.8 multiplied by 15mm of a right bracket welding piece is positioned through the right bracket rear pressing positioning pin III, and the rear part of the right bracket welding piece is pressed through the right bracket rear pressing air cylinder III, the right bracket rear pressing arm III and the right bracket rear pressing fixing plate I;

in the No. 4 jig: the left support front positioning mechanism IV (40) comprises: a left side front connecting plate locating pin IV (4001) and a left support front positioning base IV (4002), a right support rear positioning mechanism IV (43) is the same as the left support front positioning mechanism IV (40) in structure, and comprises: a right rear connecting plate positioning pin IV (4301) and a right bracket rear positioning base IV (4302);

the sealing plate welding part left pressing mechanism IV (41) comprises: a sealing plate welding part left pressing cylinder IV (4101), a sealing plate welding part left pressing arm IV (4102) and a sealing plate welding part left pressing base IV (4103); the shrouding seam piece right hold-down mechanism IV (42) is the same with seam piece left hold-down mechanism IV structure, includes: a sealing plate welding part right pressing cylinder IV (4201), a sealing plate welding part right pressing arm IV (4202) and a sealing plate welding part right pressing base IV (4203).