CN107685218B

CN107685218B - Welding processing line

Info

Publication number: CN107685218B
Application number: CN201710817256.5A
Authority: CN
Inventors: 孙志强; 刘尓彬; 张国良; 吴潮辉; 郑杰才; 谭志军; 李国平
Original assignee: Guangzhou Ruisong Intelligent Technology Co ltd
Current assignee: Guangzhou Ruisong Intelligent Technology Co ltd
Priority date: 2017-09-12
Filing date: 2017-09-12
Publication date: 2023-11-24
Anticipated expiration: 2037-09-12
Also published as: CN107685218A

Abstract

The invention discloses a welding processing line, which comprises a turnover mechanism, a conveying mechanism and a welding robot; the turnover mechanism comprises a rotating seat, a first driving device, a turntable, a second driving device which is arranged on the rotating seat and used for driving the turntable to rotate around the central axis of the turntable, a plurality of clamping devices which are circumferentially arranged around the central axis of the turntable and are commonly used for fixing workpieces, and a plurality of adjusting devices which are respectively in one-to-one correspondence with the clamping devices; the clamping devices are mounted on the turntable through corresponding adjusting devices, and each adjusting device is used for guiding the corresponding clamping device to move along the radial direction of the turntable. The invention can adjust the orientation of the workpiece, lighten the labor intensity of operators and improve the efficiency.

Description

Welding processing line

Technical Field

The invention relates to the field of welding, in particular to a welding processing line.

Background

In the welding process of the workpiece, the workpiece is clamped on a plurality of clamping devices so as to jointly fix the workpiece through the plurality of clamping devices. Wherein, a plurality of clamping devices are fixed on a fixing frame. In order to facilitate welding of different areas of a workpiece by a welding robot, it is often desirable to adjust the orientation of the workpiece. However, at present, after the workpiece is clamped on the plurality of clamping devices, the plurality of clamping devices are fixed on the fixing frame, so that the orientation of the workpiece cannot be adjusted.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention aims to provide a welding processing line which can adjust the orientation of a workpiece.

The invention adopts the following technical scheme:

a welding processing line comprises a turnover mechanism, a conveying mechanism for conveying workpieces to the turnover mechanism, and a welding robot matched with the turnover mechanism; the turnover mechanism comprises a rotating seat, a first driving device for driving the rotating seat to rotate, a turntable, a second driving device which is arranged on the rotating seat and is used for driving the turntable to rotate around the central axis of the turntable, a plurality of clamping devices which are circumferentially arranged around the central axis of the turntable and are commonly used for fixing workpieces, and a plurality of adjusting devices which are respectively in one-to-one correspondence with the plurality of clamping devices; the clamping devices are mounted on the turntable through corresponding adjusting devices, and each adjusting device is used for guiding the corresponding clamping device to move along the radial direction of the turntable.

Further, the adjusting device comprises a fixed seat fixed on the turntable, a screw rod extending along the radial direction of the turntable, a nut sleeved on the screw rod in a matched manner, and a moving part movably arranged on the fixed seat and capable of moving along the extending direction of the screw rod relative to the fixed seat; the screw rod is rotatably arranged on the fixed seat and can rotate around the central axis of the screw rod relative to the fixed seat; the clamping device is fixedly connected with the nut and the moving part of the corresponding adjusting device respectively, and one end of the screw rod, which is far away from the central axis of the turntable, is formed into a power input end.

Further, the adjusting device comprises two moving parts which are respectively arranged at two sides of the screw rod, and the clamping device is fixedly connected with the two moving parts of the corresponding adjusting device; the power input end of the screw rod is provided with a handle.

Further, the conveying mechanism is used for conveying the workpiece into a zone surrounded by the clamping devices; the clamping device comprises a supporting seat, a first clamping arm, a second clamping arm, a swinging rod, a connecting rod and an inserting piece, wherein the first clamping arm, the second clamping arm, the swinging rod, the connecting rod and the inserting piece are fixed on the supporting seat; one end of the first clamping arm, which is close to the central axis of the turntable, is formed into a first clamping end, and the second clamping arm is formed into a second clamping end; the swinging rod comprises a first end part, a second end part and a connecting part arranged between the first end part and the second end part; in each clamping device, the second clamping arm is hinged on the supporting seat, one end of the connecting rod is hinged with the second clamping arm, the other end of the connecting rod is hinged with the first end part of the swinging rod, the connecting part of the swinging rod is hinged on the supporting seat, a first perforation is arranged on the supporting seat, a movable area is further arranged on one side of the first perforation, and a second perforation is arranged at the second end part of the swinging rod; the inserting piece is used for being inserted into the first perforation and the second perforation when the second perforation is opposite to the first perforation so as to lock the swinging rod on the supporting seat, the connecting rod is used for driving the second clamping arm to move when the second perforation of the swinging rod moves from the movable area to a position opposite to the first perforation so as to drive the second clamping end of the second clamping arm to move towards a direction close to the first clamping end, and the second clamping end of the second clamping arm is used for forming a clamping area between the second perforation and the first clamping end when the second perforation is opposite to the first perforation; the supporting seat of the clamping device is fixedly connected with the nut and the moving piece of the corresponding adjusting device respectively.

Further, the connecting part of the swinging rod is hinged on the supporting seat through a first pin shaft, one end of the connecting rod is hinged with the second clamping arm through a second pin shaft, and the other end of the connecting rod is hinged with the first end part of the swinging rod through a third pin shaft; in each clamping device, when the second perforation is aligned with the first perforation, the central axis of the first pin shaft, the central axis of the second pin shaft and the central axis of the third pin shaft are positioned on the same plane.

Further, the welding processing line also comprises a bearing seat, and the first driving device comprises a first motor; the rotating seat is rotatably arranged on the bearing seat; the first driving device further comprises a first driven gear fixed on the rotating seat and a first driving gear meshed with the first driven gear; the first motor is in transmission connection with the first driving gear and is used for driving the first driving gear to rotate.

Further, the welding processing line comprises two bearing seats which are oppositely arranged; the two ends of the rotating seat are respectively and correspondingly arranged on the two bearing seats one by one; the two first driving devices are respectively in one-to-one correspondence with the two ends of the rotating seat; the first driven gears of the first driving devices are fixed on the corresponding end parts of the rotating seat.

Further, the turntable is rotatably arranged on the rotating seat; the second driving device comprises a second motor, a second driving gear and a gear ring, the second motor is fixed on the rotating seat, and the gear ring is fixed on the turntable and meshed with the second driving gear; the second motor is in transmission connection with the second driving gear and is used for driving the second driving gear to rotate.

Further, the first driving device is used for driving the rotating seat to rotate around a rotating axis perpendicular to the central axis of the turntable; the welding robot is used for welding workpieces fixed on the clamping devices; each gripping device is used for gripping the conveying mechanism to convey the past workpiece towards the turning mechanism.

Further, the conveying mechanism comprises a track positioned below the turnover mechanism, a travelling trolley moving along the track and a bearing device for placing a workpiece; a lifting driving device for driving the bearing device to lift is arranged on the walking trolley; the bearing device comprises a bracket, an objective table rotatably arranged on the bracket and used for placing a workpiece, and an air cylinder with a cylinder body fixed on the bracket; the piston rod of the cylinder is connected with an inserting rod for being inserted into a workpiece; the lifting driving device is an oil cylinder with a piston rod fixedly connected with the bracket.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, the turnover mechanism is reasonably arranged, the first driving device can be used for driving the rotating seat to rotate, the second driving device can be used for driving the turntable to rotate, so that each clamping device can rotate along with the turntable, and the workpiece on the clamping device can be driven to rotate, so that the direction of the workpiece can be adjusted, and the conveying mechanism can be used for conveying the workpiece towards the turnover mechanism, so that the workpiece does not need to be manually conveyed towards the turnover mechanism, the labor intensity of operators can be reduced, and the efficiency can be improved.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic diagram of a turnover mechanism;

FIG. 3 is another schematic view of the flipping mechanism;

FIG. 4 is a cross-sectional view of the flipping mechanism;

FIG. 5 is a schematic diagram of the cooperation of the turntable, the clamping device and the adjusting device;

FIG. 6 is a schematic view of a clamping device;

FIG. 7 is a schematic diagram showing the connection of the second clamping arm, swing lever and link

FIG. 8 is a schematic structural view of an adjusting device;

FIG. 9 is a schematic diagram of the cooperation of the clamping device and the adjusting device;

FIG. 10 is an enlarged view at A of FIG. 9;

FIG. 11 is a schematic view showing a use state of the transport mechanism;

FIG. 12 is a schematic view of the cooperation of the stage, carriage and travelling car;

FIG. 13 is a schematic view of the stage and carrier cooperation;

FIG. 14 is an enlarged view at B of FIG. 13;

FIG. 15 is a schematic view of the engagement of the traveling carriage with the track;

FIG. 16 is a schematic view of the bottom surface of the travelling carriage

In the figure: 100. a transport mechanism; 101. a walking trolley; 102. a first rotating shaft; 103. a second rotating shaft; 104. a first roller; 105. a second roller; 106. a welding slag pushing block; 107. an in-place sensor; 111. a bracket; 112. an objective table; 114. a cylinder; 115. a plug-in rod; 116. a base; 117. a carrying part; 118. a boss; 120. a track; 121. a chassis; 122. a guide rail; 130. a rotating seat; 131. a turntable; 140. a second driving device; 141. a second motor; 142. a second drive gear; 143. a gear ring; 150. a clamping device; 151. a support base; 152. a first clamping arm; 153. a second clamping arm; 154. a swinging rod; 155. a connecting rod; 156. a cartridge; 157. a clamping area; 160. an adjusting device; 161. a fixing seat; 162. a nut; 163. a screw rod; 164. a moving member; 165. a handle; 170. a first driving device; 171. a first motor; 172. a first driven gear; 173. a first drive gear; 180. a bearing seat; 190. a workpiece; 200. a power device; 201. a third motor; 202. a first sprocket; 203. a second sprocket; 204. a chain; 210. and (5) a welding robot.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and detailed description, wherein it is to be understood that, on the premise of no conflict, the following embodiments or technical features may be arbitrarily combined to form new embodiments.

A welding line as shown in fig. 1-16, comprising a turnover mechanism, a transport mechanism 100 for transporting a workpiece 190 toward the turnover mechanism, a welding robot 210 coupled to the turnover mechanism; the turnover mechanism comprises a rotating seat 130, a first driving device 170 for driving the rotating seat 130 to rotate, a turntable 131, a second driving device 140 installed on the rotating seat 130 and used for driving the turntable 131 to rotate around the central axis of the turntable 131, a plurality of clamping devices 150 which are circumferentially arrayed around the central axis of the turntable 131 and are commonly used for fixing a workpiece 190, and a plurality of adjusting devices 160 which are respectively in one-to-one correspondence with the plurality of clamping devices 150; the clamping devices 150 are mounted on the turntable 131 by corresponding adjusting devices 160, and each adjusting device 160 is used for guiding the corresponding clamping device 150 to move along the radial direction of the turntable 131.

In use, the conveying mechanism 100 conveys the workpiece 190 toward the turnover mechanism, then clamps the workpiece 190 by the plurality of clamping devices 150 of the turnover mechanism so as to fix the workpiece 190 together by the plurality of clamping devices 150, then the rotating base 130 can be driven to rotate by the first driving device 170 and the turntable 131 can be driven to rotate by the second driving device 140, at this time, the clamping devices 150 and the workpiece 190 can rotate along with the turntable 131 so as to adjust the orientation of the workpiece 190, and the welding robot 210 cooperates with the turnover mechanism to weld the workpiece 190 fixed on the plurality of clamping devices 150. The invention can utilize the conveying mechanism 100 to convey the workpiece 190 towards the turnover mechanism without manually conveying the workpiece 190 towards the turnover mechanism, thereby reducing the labor intensity of operators, and can guide the corresponding clamping device 150 to move towards the central axis direction of the turntable 131 through adopting the combination of the clamping device 150 and the adjusting device 160, thereby being convenient for the workpiece 190 with smaller outer diameter size to use, and can guide the corresponding clamping device 150 to move towards the central axis direction away from the turntable 131 through utilizing each adjusting device 160, thereby being convenient for the workpiece 190 with larger outer diameter size to use, thus being applicable to the workpieces 190 with different outer diameter sizes, and being capable of expanding the application range.

Specifically, the first driving device 170 is configured to drive the rotating base 130 to rotate about a rotation axis A2 perpendicular to the central axis A1 of the turntable 131. By adopting the above arrangement, the workpiece 190 can be driven to rotate around the central axis A1 and the rotation axis A2 of the rotating disc 131, so that the workpiece 190 can rotate bidirectionally, and the orientation of the workpiece 190 can be adjusted from different directions, so as to facilitate welding of more areas of the workpiece 190.

Further, the adjusting device 160 includes a fixed base 161 fixed on the turntable 131, a screw rod 163 extending along the radial direction of the turntable 131, a nut 162 matingly sleeved on the screw rod 163, and a moving member 164 movably mounted on the fixed base 161 and movable relative to the fixed base 161 along the extending direction of the screw rod 163; the screw rod 163 is rotatably mounted on the fixed seat 161, and can rotate around the central axis of the screw rod 163 relative to the fixed seat 161; the clamping device 150 is fixedly connected with a nut 162 and a moving member 164 of the corresponding adjusting device 160 respectively; the end of the screw 163 remote from the central axis of the turntable 131 is formed as a power input end. In use, the screw rod 163 is rotated to drive the nut 162 and the clamping device 150 to move along the radial direction of the turntable 131. By adopting the structure, the cost can be saved.

Specifically, the adjusting device 160 includes two moving members 164 disposed on two sides of the screw 163, and the clamping device 150 is fixedly connected to the two moving members 164 of the corresponding adjusting device 160, so as to improve the moving stability of the clamping device 150.

Further, a handle 165 is provided at the power input end of the screw 163, so that an operator can rotate the handle 165 to drive the screw 163 to rotate.

Further, the welding line further includes a carrying base 180, and the first driving device 170 includes a first motor 171, and the first motor 171 may be used to provide rotational power to the rotating base 130. In particular, the rotating base 130 is rotatably mounted on the carrying base 180; the first driving device 170 further comprises a first driven gear 172 fixed on the rotating base 130, and a first driving gear 173 meshed with the first driven gear 172; the first motor 171 is in driving connection with the first driving gear 173, and is used for driving the first driving gear 173 to rotate. In use, the first motor 171 operates to drive the first driving gear 173 to rotate, and drives the first driven gear 172 to rotate through the first driving gear 173, so as to drive the rotating base 130 to rotate. The invention can be conveniently installed and reduce the cost by reasonably arranging the structure of the first driving device 170.

In order to realize the transmission connection between the first motor 171 and the first driving gear 173, the output shaft of the first motor 171 may be directly and fixedly connected with the first driving gear 173, and, of course, the first motor 171 may also be connected with the first driving gear 173 through a speed reducer, a transmission mechanism, or the like, so as to realize the transmission connection between the first motor 171 and the first driving gear 173.

Further, the welding line includes two opposite bearing seats 180; the two ends of the rotating seat 130 are respectively and correspondingly arranged on the two bearing seats 180; the number of the first driving devices 170 is two, and the two first driving devices 170 are respectively in one-to-one correspondence with the two ends of the rotating seat 130; the first driven gear 172 of each first driving device 170 is fixed to a corresponding end of the rotation seat 130. In use, the first motors 171 of the two first driving devices 170 operate synchronously to drive the first driven gears 172 of the two first driving devices 170 to rotate synchronously, so as to drive the rotating base 130 to rotate. By adopting the structure, the stress on the two ends of the rotating seat 130 can be balanced, so that the rotation of the rotating seat 130 is stable.

Further, the turntable 131 is rotatably installed on the rotating base 130, and the second driving device 140 includes a second motor 141 having a body fixed on the rotating base 130, a second driving gear 142, and a gear ring 143 fixed on the turntable 131 and engaged with the second driving gear 142; the second motor 141 is in driving connection with the second driving gear 142, and is used for driving the second driving gear 142 to rotate. When in use, the second motor 141 works to drive the second driving gear 142 to rotate, and the gear ring 143 is driven by the second driving gear 142, so that the turntable 131 can be driven to rotate. By adopting the structure, the invention can be conveniently installed.

In order to realize the transmission connection between the second motor 141 and the second driving gear 142, the output shaft of the second motor 141 may be directly and fixedly connected with the second driving gear 142, and, of course, the second motor 141 may also be connected with the second driving gear 142 through a speed reducer, a transmission mechanism, or the like, so as to realize the transmission connection between the second motor 141 and the second driving gear 142.

The conveying mechanism 100 is used for conveying the workpiece 190 into a zone surrounded by the plurality of clamping devices 150; the clamping device 150 comprises a supporting seat 151, a first clamping arm 152, a second clamping arm 153, a swinging rod 154, a connecting rod 155 and an inserting piece 156, wherein the first clamping arm 152, the second clamping arm 153, the swinging rod 154 and the inserting piece 156 are fixed on the supporting seat 151; one end of the first clamping arm 152, which is close to the central axis of the turntable 131, is formed as a first clamping end, and the second clamping arm 153 is formed as a second clamping end; the swing lever 154 includes a first end portion, a second end portion, and a connecting portion provided between the first end portion and the second end portion; in each clamping device 150, the second clamping arm 153 is hinged on the supporting seat 151, one end of the connecting rod 155 is hinged with the second clamping arm 153, the other end of the connecting rod 155 is hinged with the first end part of the swinging rod 154, the connecting part of the swinging rod 154 is hinged on the supporting seat 151, a first through hole is arranged on the supporting seat 151, one side of the first through hole is also provided with a movable area, and the second end part of the swinging rod 154 is provided with a second through hole; the insert 156 is configured to be inserted into the first through hole and the second through hole when the second through hole is opposite to the first through hole so as to lock the swing rod 154 on the supporting seat 151, and the connecting rod 155 is configured to drive the second clamping arm 153 to move when the second through hole of the swing rod 154 moves from the active area to a position opposite to the first through hole so as to urge the second clamping end of the second clamping arm 153 to move in a direction approaching to the first clamping end, where the second clamping end of the second clamping arm 153 is configured to form a clamping area 157 with the first clamping end when the second through hole is opposite to the first through hole.

In use, the workpiece 190 is transported to the area surrounded by the plurality of holding devices 150 by the transport mechanism 100, then the corresponding holding device 150 is guided by the adjusting device 160 to move towards the direction close to the central axis A1 of the turntable 131 to approach the workpiece 190, the workpiece 190 is located between the first holding end of the first holding arm 152 and the second holding end of the second holding arm 153 of the holding device 150, then the swinging rod 154 is rotated to move the second through hole of the swinging rod 154 from the active area to a position opposite to the first through hole, at this time, the second holding end of the second holding arm 153 is moved towards the direction close to the first holding end of the first holding arm 152, and when the second through hole of the swinging rod 154 is opposite to the first through hole, the workpiece 190 is held between the first holding end of the first holding arm 152 and the second holding end of the second holding arm 153 and at the holding area 157 formed by the two, then, the insert 156 is inserted into the first through hole and the second through hole to lock the swing rod 154 on the supporting seat 151, so that the swing rod 154 cannot rotate relative to the supporting seat 151 at this time, and since at this time, the hinge point O between the connecting rod 155 and the swing rod 154 and the hinge point a between the second clamping arm 153 and the supporting seat 151 are fixed relative to the hinge point B between the connecting rod 155 and the second clamping arm 153, the hinge point B cannot move relative to the hinge point O and the hinge point a, so that the second clamping end of the second clamping arm 153 cannot rotate relative to the supporting seat 151, and thus, the clamping stability of the second clamping end of the second clamping arm 153 and the first clamping end of the first clamping arm 152 can be ensured, and thus, each clamping device 150 can clamp the workpiece 190 conveyed by the conveying mechanism 100 toward the turning mechanism in the above manner, to collectively secure the work piece 190. After the workpiece 190 is welded, the insert 156 may be pulled out, and then the swing rod 154 is rotated to move the second through hole of the swing rod 154 toward the movable area, at this time, the second clamping end of the second clamping arm 153 moves toward a direction away from the first clamping end of the first clamping arm 152, and after the second clamping end of the clamping device 150 is away from the first clamping end, the clamping force on the workpiece 190 may be removed to loosen the workpiece 190, and then the adjusting device 160 is used to guide the corresponding clamping devices 150 to move toward a direction away from the central axis A1 of the turntable 131 to be away from the workpiece 190, so that the workpiece 190 may be conveniently removed by loosening each clamping device 150 and moving away from the workpiece 190. Therefore, the clamping device 150 of the present invention adopts the combination design of the support base 151, the first clamping arm 152, the second clamping arm 153, the swinging rod 154, the connecting rod 155 and the plug-in unit 156, so that the structure is simpler, the air cylinder 114 is not required, and the air distribution device is not required, thereby being beneficial to reducing the cost of the clamping device 150.

Specifically, the supporting seat 151 of each clamping device 150 is fixedly connected with the nut 162 and the moving member 164 of the corresponding adjusting device 160.

Further, the connection part of the swinging rod 154 is hinged on the supporting seat 151 through a first pin shaft, one end of the connecting rod 155 is hinged with the second clamping arm 153 through a second pin shaft, and the other end of the connecting rod 155 is hinged with the first end part of the swinging rod 154 through a third pin shaft; in each clamping device 150, when the second perforation is aligned with the first perforation, the central axis of the first pin, the central axis of the second pin, and the central axis of the third pin are located on the same plane, so that self-locking can be formed, and further clamping stability can be ensured. Specifically, the connecting portion of the swinging rod 154 is provided with a first pin hole, the supporting seat 151 is provided with a second pin hole, and the first pin shaft penetrates through the first pin hole of the connecting portion and the second pin hole of the supporting seat 151, so that the swinging rod 154 can rotate around the central axis of the first pin shaft relative to the supporting seat 151. One end of the connecting rod 155 is provided with a third pin hole, the second clamping arm 153 is provided with a fourth pin hole, and the second pin shaft is arranged through the third pin hole of the connecting rod 155 and the fourth pin hole of the second clamping arm 153, so that the connecting rod 155 and the second clamping arm 153 can rotate relatively around the central axis of the second pin shaft. The other end of the connecting rod 155 is provided with a fifth pin hole, the first end of the swinging rod 154 is provided with a sixth pin hole, and the third pin shaft is arranged in the fifth pin hole and the sixth pin hole in a penetrating manner, so that the connecting rod 155 and the swinging rod 154 can rotate relatively around the central axis of the third pin shaft.

Further, the turntable 131 and the second clamping arm 153 are located on the same side of the first clamping arm 152; the second clamping arm 153 comprises a longitudinal plate hinged on the supporting seat 151, a transverse plate arranged on the longitudinal plate; the end of the transverse plate remote from the longitudinal plate is formed as a second clamping end. By adopting the structure, the processing and manufacturing can be facilitated.

In particular, the use of the cartridge pins for the cartridge 156 may further reduce cost.

Further, through holes are formed in the rotating seat 130 and the turntable 131, and the central axis of the through hole coincides with the central axis of the turntable 131. By adopting the above structure, the welding arm of the welding robot 210 can pass through the through holes of the rotating base 130 and the turntable 131 to weld the workpiece 190 during the welding process.

Further, the conveying mechanism 100 comprises a rail 120 positioned below the turnover mechanism, a travelling trolley 101 moving along the rail 120, and a carrying device for placing the workpiece 190; the traveling trolley 101 is provided with a lifting driving device for driving the bearing device to lift. In use, the carriage 101 can be driven to move along the track 120 with the workpiece 190 thereon, and when the carriage moves to face the turnover mechanism, the carriage can be driven to rise by the lifting driving device, so that the workpiece 190 can be clamped by the clamping device 150 on the turnover mechanism conveniently.

The bearing device comprises a bracket 111, a carrying table 112 rotatably arranged on the bracket 111 and used for placing a workpiece 190, and an air cylinder 114 with a cylinder body fixed on the bracket 111; the piston rod of the cylinder 114 is connected with an inserting rod 115 for being inserted into the workpiece 190. By adopting the above structure, after the workpiece 190 is placed on the stage 112, a pushing force can be applied to rotate the stage 112 and the workpiece 190, and after the workpiece 190 rotates to a predetermined position, the air cylinder 114 can be operated to drive the inserting rod 115 to insert into the workpiece 190, so as to complete the positioning of the workpiece 190.

The work 190 is provided with a pilot hole unit including a pilot hole for the insertion of the insertion rod 115. At least a part of the positioning hole is formed into a matching part, and the inserting rod 115 comprises an inserting part which is inserted into the matching part, and the diameter of the inserting part is matched with that of the matching part. Specifically, the positioning hole is in a conical shape with a large upper part and a small lower part, and the diameter of the lower end of the positioning hole is matched with the diameter of the insertion part, namely, the lower end of the positioning hole is formed into the matching part.

The pilot hole unit includes a plurality of pilot holes arranged circumferentially on the work 190 around the central axis of the work 190. The stage 112 is provided with a limiting structure for limiting the workpiece 190 to a position where the central axis of the workpiece 190 coincides with the rotation axis Z1 of the stage 112. In use, different positioning holes can be aligned with the insertion rod 115 by rotation of the workpiece 190, and the insertion rod 115 can be inserted into different positioning holes to lock the workpiece 190 in different orientations, so that the use is more flexible and convenient. The rotation axis Z1 of the stage 112 is, according to common knowledge, a rotation axis around which the stage 112 rotates when it rotates.

The limiting structure is a protruding portion 118 arranged in the middle of the objective table 112 and protruding upwards, and when in use, the workpiece 190 is placed on the objective table 112 and sleeved on the protruding portion 118, so that the workpiece 190 is limited by the protruding portion 118 to a position where the central axis of the workpiece 190 coincides with the rotation axis Z1 of the objective table 112. Of course, in addition to this, the limiting structure may be provided as a plurality of limiting blocks for limiting the workpiece 190, or other structures, etc.

Further, the carrying device includes a plurality of air cylinders 114, and distances between the inserting rods 115 on the plurality of air cylinders 114 and the rotation axis Z1 of the objective table 112 are different, and by adopting the plurality of air cylinders 114, distances between the inserting rods 115 on the plurality of air cylinders 114 and the rotation axis Z1 of the objective table 112 are different, so that the carrying device is applicable to workpieces 190 with different sizes, so as to expand the application range thereof.

Further, the stand 111 includes a base 116, a carrying portion 117 disposed on the base 116 and extending upward, and the stage 112 is rotatably mounted on the carrying portion 117 of the stand 111; the cylinders 114 are distributed on the periphery of the bearing portion 117, and by adopting the above structure, the installation is facilitated and the space can be reasonably utilized.

A plurality of fixing frames which are respectively corresponding to the air cylinders 114 one by one are fixed on the base 116; the cylinder bodies of the cylinders 114 are fixed on corresponding fixing frames so as to facilitate the installation of each cylinder 114.

Specifically, the rotation axis Z1 of the objective table 112 is a vertical axis, that is, the rotation axis Z1 of the objective table 112 is a direction along the vertical direction; the stage 112 is provided with a horizontal placement surface for placing the workpiece 190, and the rotation axis of the stage 112 is perpendicular to the horizontal placement surface.

The travelling trolley 101 comprises a moving frame, a first rotating shaft 102 rotatably mounted on the moving frame, a power device 200 for driving the first rotating shaft 102 to rotate, and a second rotating shaft 103 rotatably mounted on the moving frame; the central axis of the first rotating shaft 102 is parallel to and staggered from the central axis of the second rotating shaft 103, the two end parts of the first rotating shaft 102 are both fixed with first rollers 104, and the two end parts of the second rotating shaft 103 are both fixed with second rollers 105; the first roller 104 and the second roller 105 are in rolling fit with the track 120. When in use, the power device 200 can be started first to drive the first rotating shaft 102 to rotate, so as to drive the first rollers 104 at two ends of the first rotating shaft 102 to roll along the track 120, and at this time, the carrying device moves along with the travelling trolley 101. According to the invention, the travelling trolley 101 adopts the combination design of the moving frame, the first rotating shaft 102, the power device 200, the second rotating shaft 103, the first roller 104 and the second roller 105, so that the travelling trolley can drive the bearing device to move, and meanwhile, the travelling trolley is stable in operation, low in cost and beneficial to popularization.

Further, the power unit 200 includes a third motor 201 having a body fixed to the moving frame to provide rotational power to the first shaft 102 by using the third motor 201. The third motor 201 may be directly and fixedly connected to the first shaft 102, so as to directly transmit the rotational power to the first shaft 102 through the third motor 201. Of course, in addition to this, the power device 200 may further include a first sprocket 202, a second sprocket 203 fixed on the first shaft 102, and a chain 204 wound around the first sprocket 202 and the second sprocket 203; the third motor 201 is in transmission connection with the first sprocket 202 and is used for driving the first sprocket 202 to rotate, and when in use, the third motor 201 works to drive the first sprocket 202 to rotate and drive the second sprocket 203 and the first rotating shaft 102 to rotate through the chain 204.

Specifically, the output shaft of the third motor 201 may be directly and fixedly connected with the first sprocket 202, so as to realize transmission connection between the third motor 201 and the first sprocket 202, and, of course, in addition, the third motor 201 may also be connected with the first sprocket 202 through a speed reducer or a transmission mechanism, so as to realize transmission connection between the third motor 201 and the first sprocket 202.

Further, the track 120 includes a chassis 121, and two guide rails 122 respectively disposed on two sides of the chassis 121; the first rollers 104 at two ends of the first rotating shaft 102 are respectively in one-to-one correspondence with the two guide rails 122, and the first rollers 104 at each end of the first rotating shaft 102 are in rolling fit with the corresponding guide rails 122; the second rollers 105 at two ends of the second rotating shaft 103 are respectively in one-to-one correspondence with the two guide rails 122, and the second rollers 105 at each end of the second rotating shaft 103 are in rolling fit with the corresponding guide rails 122. By adopting the above structure, the traveling carriage 101 can be moved more stably.

The lifting driving device is an oil cylinder. Specifically, the cylinder body of the cylinder is fixed on the moving frame, and the piston rod is fixedly connected with the bracket 111. By adopting the structure, the bracket 111 can be driven to lift by the oil cylinder, so that the use of the device is more convenient and flexible.

Further, the moving frame is further provided with a slag pushing block 106 above the rail 120. In the moving process of the travelling bogie 101, the welding slag on the track 120 can be removed by using the welding slag pushing block 106, so that the influence of the welding slag on the moving of the travelling bogie 101 is avoided, and the moving of the travelling bogie 101 can be more stable.

Further, one end of the rail 120 is located below the turnover mechanism, and both ends of the rail 120 are provided with in-place sensors 107, the welding processing line further includes a control device, the in-place sensors 107 are used for sending signals to the control device when the travelling trolley 101 is detected, and the control device is used for controlling the travelling trolley 101 to stop moving when the signals of the in-place sensors 107 are received, so that the travelling trolley 101 can be controlled more automatically.

The above embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention are intended to be within the scope of the present invention as claimed.

Claims

1. A welding process line, characterized in that: the welding robot is matched with the turnover mechanism; the turnover mechanism comprises a rotating seat, a first driving device for driving the rotating seat to rotate, a turntable, a second driving device which is arranged on the rotating seat and is used for driving the turntable to rotate around the central axis of the turntable, a plurality of clamping devices which are circumferentially arranged around the central axis of the turntable and are commonly used for fixing workpieces, and a plurality of adjusting devices which are respectively in one-to-one correspondence with the plurality of clamping devices; the clamping devices are arranged on the turntable through corresponding adjusting devices, and each adjusting device is used for guiding the corresponding clamping device to move along the radial direction of the turntable;

the conveying mechanism is used for conveying the workpiece into a zone surrounded by the clamping devices; the clamping device comprises a supporting seat, a first clamping arm, a second clamping arm, a swinging rod, a connecting rod and an inserting piece, wherein the first clamping arm, the second clamping arm, the swinging rod, the connecting rod and the inserting piece are fixed on the supporting seat; one end of the first clamping arm, which is close to the central axis of the turntable, is formed into a first clamping end, and the second clamping arm is formed into a second clamping end; the swinging rod comprises a first end part, a second end part and a connecting part arranged between the first end part and the second end part; in each clamping device, the second clamping arm is hinged on the supporting seat, one end of the connecting rod is hinged with the second clamping arm, the other end of the connecting rod is hinged with the first end part of the swinging rod, the connecting part of the swinging rod is hinged on the supporting seat, a first perforation is arranged on the supporting seat, a movable area is further arranged on one side of the first perforation, and a second perforation is arranged at the second end part of the swinging rod; the inserting piece is used for being inserted into the first perforation and the second perforation when the second perforation is opposite to the first perforation so as to lock the swinging rod on the supporting seat, the connecting rod is used for driving the second clamping arm to move when the second perforation of the swinging rod moves from the movable area to a position opposite to the first perforation so as to drive the second clamping end of the second clamping arm to move towards a direction close to the first clamping end, and the second clamping end of the second clamping arm is used for forming a clamping area between the second perforation and the first clamping end when the second perforation is opposite to the first perforation; the supporting seat of the clamping device is fixedly connected with the nut and the moving piece of the corresponding adjusting device respectively;

the connecting part of the swinging rod is hinged on the supporting seat through a first pin shaft, one end of the connecting rod is hinged with the second clamping arm through a second pin shaft, and the other end of the connecting rod is hinged with the first end part of the swinging rod through a third pin shaft; in each clamping device, when the second perforation is aligned with the first perforation, the central axis of the first pin shaft, the central axis of the second pin shaft and the central axis of the third pin shaft are positioned on the same plane.

2. The welding process line of claim 1, wherein: the adjusting device comprises a fixed seat fixed on the turntable, a screw rod extending along the radial direction of the turntable, a nut sleeved on the screw rod in a matched manner, and a moving piece movably arranged on the fixed seat and capable of moving along the extending direction of the screw rod relative to the fixed seat; the clamping device is fixedly connected with the two moving parts corresponding to the adjusting device; the screw rod is rotatably arranged on the fixed seat and can rotate around the central axis of the screw rod relative to the fixed seat; the clamping device is fixedly connected with the nut and the moving part of the corresponding adjusting device respectively, and one end of the screw rod, which is far away from the central axis of the turntable, is formed into a power input end.

3. The welding process line of claim 1, wherein: the welding processing line also comprises a bearing seat, and the first driving device comprises a first motor; the rotating seat is rotatably arranged on the bearing seat; the first driving device further comprises a first driven gear fixed on the rotating seat and a first driving gear meshed with the first driven gear; the first motor is in transmission connection with the first driving gear and is used for driving the first driving gear to rotate.

4. A welding line as defined in claim 3, wherein: the welding processing line comprises two bearing seats which are oppositely arranged; the two ends of the rotating seat are respectively and correspondingly arranged on the two bearing seats one by one; the two first driving devices are respectively in one-to-one correspondence with the two ends of the rotating seat; the first driven gears of the first driving devices are fixed on the corresponding end parts of the rotating seat.

5. The welding process line of claim 1, wherein: the turntable is rotatably arranged on the rotating seat; the second driving device comprises a second motor, a second driving gear and a gear ring, the second motor is fixed on the rotating seat, and the gear ring is fixed on the turntable and meshed with the second driving gear; the second motor is in transmission connection with the second driving gear and is used for driving the second driving gear to rotate.

6. The welding process line of claim 1, wherein: the first driving device is used for driving the rotating seat to rotate around a rotating axis perpendicular to the central axis of the turntable; the welding robot is used for welding workpieces fixed on the clamping devices; each gripping device is used for gripping the conveying mechanism to convey the past workpiece towards the turning mechanism.

7. The welding process line of claim 1, wherein: the conveying mechanism comprises a track positioned below the turnover mechanism, a travelling trolley moving along the track and a bearing device for placing a workpiece; a lifting driving device for driving the bearing device to lift is arranged on the walking trolley; the bearing device comprises a bracket, an objective table rotatably arranged on the bracket and used for placing a workpiece, and an air cylinder with a cylinder body fixed on the bracket; the piston rod of the cylinder is connected with an inserting rod for being inserted into a workpiece; the lifting driving device is an oil cylinder with a piston rod fixedly connected with the bracket.