CN116214054A - Assembly welding tool for single spiral screen frame - Google Patents

Assembly welding tool for single spiral screen frame Download PDF

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Publication number
CN116214054A
CN116214054A CN202310393606.5A CN202310393606A CN116214054A CN 116214054 A CN116214054 A CN 116214054A CN 202310393606 A CN202310393606 A CN 202310393606A CN 116214054 A CN116214054 A CN 116214054A
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China
Prior art keywords
arc
sides
support
screen frame
welding
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Pending
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CN202310393606.5A
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Chinese (zh)
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梁龙山
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Individual
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Individual
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Priority to CN202310393606.5A priority Critical patent/CN116214054A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/0426Fixtures for other work
    • B23K37/0435Clamps
    • B23K37/0443Jigs
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

The invention relates to a fixing device for welding, in particular to a welding fixture for a single spiral screen frame. The invention provides a single-spiral screen frame assembly welding tool which comprises a support, a central shaft, convex discs and arc locking cards, wherein arc grooves are formed in the tops of two sides of the support, the central shaft is placed between the arc grooves on two sides, the convex discs are connected to two sides of the central shaft, the central shaft is used for supporting a semicircular tool, the arc locking cards are provided with a plurality of arc locking cards and are in double numbers, connecting blocks are connected to two sides of each arc locking card, the connecting blocks are used for fixing the two arc locking cards, and the end faces of the two arc locking cards are circular when being attached and can be sleeved on the semicircular tool and used for pressing the semicircular tool. When the welding machine is used for welding, two semicircular tools can be assembled together to be integrally welded, so that the frame edges can be aligned conveniently, the frame edges can be aligned better, and the position deviation degree of the frame edges in the welding process is reduced.

Description

Assembly welding tool for single spiral screen frame
Technical Field
The invention relates to a fixing device for welding, in particular to a welding fixture for a single spiral screen frame.
Background
The single screw pulp extruder is mainly used for concentrating and dewatering pulp in the pulp making process of a paper mill, so that the pulp concentration reaches the required concentration. The spiral is a conveying extrusion type variable-diameter variable-pitch spiral rotating in a screen frame, the clearance between the spiral and the screen frame is strictly required, and the upper part of the spiral is 1.5mm, and the lower part of the spiral is 1-1.5 mm. Therefore, there is a certain requirement on the manufacture of the screen frame, if the ellipse is too large after the screen frame is manufactured, the gap between the blade and the screen frame is uneven, and the gap between the spiral and the screen frame cannot be adjusted, so that uneven dryness of the slurry and uneven discharge are caused.
At present, when a screen frame is manufactured, semicircular tools are generally used for semi-assembly welding, post-welding processing, combining and assembling. In the process of semi-circular tool semi-assembly welding, the tool is semicircular and is heavy, and is usually horizontally placed on a platform to perform welding operation, so that the operation is inconvenient during welding, and the welding seam is not well formed; meanwhile, the semi-circular workpieces are subjected to semi-assembly welding, and after being heated, the semi-circular workpieces are easy to stretch and deform outwards, difficult to control and easy to form oval shapes after being welded; and the outer frames are difficult to align in the welding process of the two half screen frames by split-type assembly welding, and the roundness is easy to be out of tolerance.
Disclosure of Invention
In view of this, the invention provides a single spiral screen frame assembly welding tool.
The technical proposal is as follows: the utility model provides a group welding frock of single spiral reel, including the support, the center pin, the flange, arc locking card and clamping assembly, the arc wall has all been seted up at support both sides top, the center pin has been placed between the arc wall of both sides, the center pin both sides all are connected with the flange, the center pin is used for supporting semicircle type frock, arc locking card is provided with a plurality of and quantity is even, arc locking card both sides all are connected with the connecting block, the connecting block is used for fixed two arc locking cards, be circular and can the suit on semicircle type frock when the terminal surface of two arc locking cards pastes mutually, be used for pushing down semicircle type frock, be equipped with the clamping assembly who is used for centre gripping semicircle type frock on the flange.
Further stated, the clamping assembly comprises a connecting frame, clamping blocks and a screw rod, wherein the middle parts of the upper side and the lower side of the convex disc on one side are all connected with the connecting frame in a sliding mode, the clamping blocks are all connected with the two connecting frames in a sliding mode, the screw rod is connected with the two connecting frames in a rotating mode, and the screw rod is in threaded connection with the clamping blocks.
Further, the device comprises a bearing assembly, the bearing assembly comprises guide seats, bearing brackets and electric push rods, the lower parts of two sides of the bearing are connected with the guide seats, the bearing brackets are connected between the guide seats on two sides in a sliding mode, at least one electric push rod is mounted on the bearing, and the telescopic rods of the electric push rods are connected with the bearing brackets.
Further, the arc-shaped locking clamp further comprises locking blocks, the middle parts of two sides of the arc-shaped locking clamp are connected with the locking blocks, clamping grooves are formed in the support brackets, and the clamping grooves are used for clamping the locking blocks.
Further, the novel screw rod driving device further comprises a driving loosening assembly, the driving loosening assembly comprises racks, driving gears, toothed rings and transmission gears, the tops of the supporting brackets are connected with the racks, one sides of the two screw rods are connected with the driving gears, the racks move to rub the driving gears to rotate, the toothed rings are rotatably connected on the central shaft, the other sides of the two screw rods are connected with the transmission gears, and the transmission gears are meshed with the toothed rings.
Further, the positioning device comprises a mounting seat and a positioning plate, wherein the middle parts of two sides of the convex disc on one side are connected with the mounting seat, through grooves are formed in the middle parts of two sides of the convex disc, the positioning plate can penetrate through the through grooves on two sides, and the positioning plate can be mounted at the mounting seat through bolts and is used for fixing the positioning plate.
Further, the vibration machine is arranged on the support, and the vibration end of the vibration machine is in contact with the central shaft.
Further, the device also comprises a positioning pin, the left side of the central shaft is connected with the positioning pin in a sliding mode, one side of the top of the support is provided with an arc-shaped clamping groove, and the positioning pin is positioned in the arc-shaped clamping groove.
The invention has the beneficial effects that:
1. when the welding machine is used for welding, two semicircular tools can be assembled together to be integrally welded, so that the frame edges can be aligned conveniently, the frame edges can be aligned better, and the position deviation degree of the frame edges in the welding process is reduced.
2. According to the invention, during welding, the lower semicircular tool can be supported through the support bracket, and the lower semicircular tool is not required to be supported manually, so that the operation is more convenient.
3. According to the welding fixture, during welding, the semicircular fixture can be fixed by the arc-shaped locking clamping sleeve, so that the semicircular fixture is prevented from being deformed under the influence of welding stress during welding.
4. After welding is finished, the semicircular tool can be loosened by driving the loosening assembly to drive the clamping block, and manual operation is not needed to loosen the semicircular tool, so that the operation is convenient.
5. According to the invention, after the semicircular tool is placed, the semicircular tool can be positioned through the positioning plate, and meanwhile, the support bracket can also be used for positioning the semicircular tool by clamping the locking block, so that the position of the semicircular tool is prevented from being deviated in the welding process.
6. After the welding is finished, the welded semicircular tool can be vibrated by the vibrating machine, so that the welding stress on the semicircular tool is reduced, and the welding deformation is reduced.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a schematic perspective view of the support, the central shaft and the cam according to the present invention.
Fig. 3 is a schematic perspective view of the cam, the arc-shaped locking card and the connecting block of the present invention.
Fig. 4 is a schematic perspective view of the arc-shaped locking card and the connecting block of the present invention.
Fig. 5 is a schematic perspective view of the clamping assembly and cam of the present invention.
Fig. 6 is a schematic perspective view of a clamping assembly according to the present invention.
Figure 7 is a schematic perspective view of the support assembly and support of the present invention.
Figure 8 is a schematic perspective view of the support assembly of the present invention.
Fig. 9 is a schematic perspective view of the driving release assembly of the present invention.
Fig. 10 is a schematic perspective view of the components of the mounting base, the positioning plate, the locking block, etc. of the present invention.
Fig. 11 is a schematic perspective view of a cam, a mounting base and a positioning plate according to the present invention.
Fig. 12 is a schematic perspective view of the components of the support, the vibration machine, the central shaft, etc. of the present invention.
Fig. 13 is a schematic perspective view of the support, center shaft and locating pin of the present invention.
The marks of the components in the drawings are as follows: 1. the device comprises a support, 2, a central shaft, 21, a convex disc, 31, an arc locking clamp, 32, a connecting block, 41, a connecting frame, 42, a clamping block, 43, a screw, 51, a guide seat, 52, a support bracket, 53, an electric push rod, 61, a rack, 62, a driving gear, 63, a toothed ring, 64, a transmission gear, 7, a locking block, 81, a mounting seat, 82, a positioning plate, 9, a vibration machine, 10, a positioning pin, 100, a semicircular tool, 200 and a frame edge.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description, but does not limit the scope of protection and the application of the invention.
Example 1
The utility model provides a group welding frock of single spiral reel, as shown in fig. 1-6, including support 1, center pin 2, boss 21, arc locking card 31 and clamping assembly, the arc wall that is horizontal setting has all been seted up at support 1 left and right sides top, center pin 2 has been placed between the arc wall of both sides, center pin 2 left and right sides all is connected with boss 21, semicircle type frock 100 can be placed on center pin 2, center pin 2 is used for supporting semicircle type frock 100, arc locking card 31 is provided with a plurality of, the quantity of arc locking card 31 is the double-number, both sides all are connected with connecting block 32 around the arc locking card 31, the through-hole has been seted up on the connecting block 32, be circular and can the suit on semicircle type frock 100 when the terminal surface of two arc locking cards 31 pastes mutually, be used for pushing down semicircle type frock 100, in order to prevent semicircle type frock 100 welding deformation, the through-hole on the connecting block 32 also aligns each other with the bolt, can pass the through-hole on two connecting blocks 32 this moment, and twist the nut on the bolt, in order to fix two arc locking card 31, be equipped with clamping assembly who is used for clamping assembly type 100 on the boss 21.
As shown in fig. 5 and 6, the clamping assembly comprises a connecting frame 41, clamping blocks 42 and a screw 43, wherein the middle parts of the upper side and the lower side of the right convex disc 21 are both connected with the connecting frame 41 in a sliding manner, the left sides of the two connecting frames 41 are both connected with the clamping blocks 42 in a sliding manner, the screw 43 is connected with the two connecting frames 41 in a rotating manner, and the screw 43 is in threaded connection with the clamping blocks 42.
When the screen frame assembly welding is needed, the device can be used, when in use, the connecting frames 41 at two sides are firstly slid to be away from each other to drive the clamping blocks 42 to move, so that the clamping blocks 42 no longer block the convex disc 21, then the two semicircular tools 100 are respectively sleeved on the upper side and the lower side of the central shaft 2, the two semicircular tools 100 are mutually aligned, after alignment, the connecting frames 41 at two sides are pulled to reset, then the screw 43 is rotated again, the clamping blocks 42 are driven to move rightwards through threads on the screw 43 to clamp the semicircular tools 100, simultaneously, the two semicircular tools 100 can be tightly attached to the convex disc 21 at the right side to be positioned, then a plurality of arc locking cards 31 are grouped in pairs, and the two arc locking cards 31 in groups are respectively sleeved on the two semicircular tools 100, after the sleeving, the connecting blocks 32 on the two arc locking cards 31 are aligned, then, bolts are threaded through the through holes on the connecting blocks 32 and nuts are screwed on the bolts to fix the arc locking cards 31, so that the two semicircular tools 100 are pressed and locked, deformation of the semicircular tools 100 in the welding process is avoided, then the frame edge 200 can be sleeved on the semicircular tools 100, welding of the frame edge 200 is performed, when welding is performed, the semicircular tools 100 and the frame edge 200 above are welded firstly, after welding is completed, the central shaft 2 is operated to rotate for one hundred eighty degrees, the non-welded semicircular tools 100 are rotated to the upper side, and then the non-welded semicircular tools 100 are welded, so that welding of the frame edge 200 can be performed by aligning the two semicircular tools 100 in the welding process, deviation of the welding position of the frame edge 200 can be avoided, and when welding is performed, the welding is performed transversely on the central shaft 2, the central shaft 2 is used for supporting, and welding is more convenient.
Example 2
On the basis of embodiment 1, as shown in fig. 7 and 8, the device further comprises a bearing assembly, the bearing assembly comprises a guide seat 51, a bearing bracket 52 and an electric push rod 53, the lower parts of the left side and the right side of the bearing 1 are respectively connected with the guide seat 51, the bearing bracket 52 is connected between the guide seats 51 on the two sides in a sliding mode, the electric push rod 53 is respectively arranged on the lower parts of the left side and the right side of the bearing 1, a telescopic rod of the electric push rod 53 is connected with the bearing bracket 52, and the bearing bracket 52 moves upwards to cover the arc-shaped locking card 31.
Initially, the telescopic link of electric putter 53 is the extension state, after placing the semicircle type frock 100 of downside, can start electric putter 53's telescopic link extension earlier, and it is rotatory to drive support bracket 52, support bracket 52 upwards moves and can support semicircle type frock 100 of downside to support semicircle type frock 100 of downside, so, just need not the manual work and support semicircle type frock 100 of downside, it is more convenient during the operation, when needing to operate center pin 2 rotatory one hundred eighty degrees, start electric putter 53 telescopic link extension earlier, operate center pin 2 rotation again, after the rotation is accomplished, start electric putter 53 telescopic link extension again.
As shown in fig. 10, the locking device further comprises a locking block 7, wherein the middle parts of the left side and the right side of the arc-shaped locking card 31 are respectively connected with the locking block 7, a clamping groove is formed in the support bracket 52, and when the support bracket 52 is sleeved on the arc-shaped locking card 31, the locking block 7 is also clamped in the clamping groove, so that the arc-shaped locking card 31 is locked through the support bracket 52 and the locking block 7.
When the support bracket 52 moves upwards, the support bracket can be clamped on the locking block 7 of the arc locking clamp 31, so that the arc locking clamp 31 is locked, meanwhile, the semicircular tool 100 can be locked, the arc locking clamp 31 and the semicircular tool 100 are prevented from rotating at will, and when the arc locking clamp is required to rotate after welding is finished, the support bracket 52 can be controlled to move downwards firstly and then rotate.
As shown in fig. 9, the driving release assembly further comprises a driving release assembly, the driving release assembly comprises a rack 61, a driving gear 62, a toothed ring 63 and a transmission gear 64, the right side of the top of the support bracket 52 is connected with the rack 61, the left sides of the two screws 43 are all connected with the driving gear 62, the driving gear 62 on the lower side is located at the moving track of the rack 61, the right side of the central shaft 2 is rotatably connected with the toothed ring 63, the right sides of the two screws 43 are all connected with the transmission gear 64, and the transmission gear 64 is meshed with the toothed ring 63.
The support bracket 52 can drive the rack 61 to move up and down when moving up and down, the rack 61 can be meshed with the driving gear 62 when moving up, at this time, the driving gear 62 rotates to drive the screw 43 connected with the rack to rotate, the screw 43 rotates to drive the other screw 43 to rotate through the transmission gear 64 and the toothed ring 63, thereby driving the two screws 43 to rotate together, the screw 43 drives the two clamping blocks 42 to move rightwards together to clamp the semicircular tool, after the welding of the semicircular tool 100 above is finished, the support bracket 52 is operated to move downwards to drive the rack 61 to move downwards, at this time, the rack 61 is used for poking the driving gear 62 to rotate reversely, so that the transmission gear 64 and the toothed ring 63 drive the two screws 43 to rotate reversely, thereby driving the clamping blocks 42 to move leftwards to clamp the semicircular tool 100, then the central shaft 2 is operated to rotate one hundred eighty degrees, after the rotation is finished, the support bracket 52 is operated to move upwards again, after the complete welding is finished, the support bracket 52 is moved downwards again, at this time, the clamping blocks 42 are driven to not clamp the semicircular tool 100 any more, and then the semicircular tool 100 can be conveniently dismounted, and thus, the manual operation 43 is more convenient when the screw is operated.
As shown in fig. 10 and 11, the positioning device further comprises a mounting seat 81 and a positioning plate 82, wherein the middle parts of the front side and the rear side of the left side surface of the left convex disk 21 are respectively connected with the mounting seat 81, the middle parts of the front side and the rear side surface of the left convex disk 21 and the right convex disk 21 are respectively provided with a through groove, the positioning plate 82 can penetrate through the through grooves on the two sides, and the positioning plate 82 can be mounted at the mounting seat 81 through bolts and used for fixing the positioning plate 82.
Positioning grooves are formed in the front side and the rear side of the bottom of the semicircular tool 100, when the two semicircular tools 100 are placed, the positioning grooves on the two semicircular tools 100 form a slot, at the moment, the two positioning plates 82 can be respectively inserted into the two slots, so that the two semicircular tools 100 are positioned, after the two positioning plates are inserted, the positioning plates 82 are fixed on the mounting seat 81 through bolts, and the positioning plates 82 are fixed, so that the semicircular tools 100 can be positioned.
As shown in fig. 12, the vibration machine 9 is further included, the vibration machine 9 is installed at the upper right side of the support 1, and the vibration end of the vibration machine 9 is in contact with the central shaft 2. After the welding is finished, stress is easy to exist at the position of the welded semicircular tool 100, and at the moment, the vibrator 9 can be started to vibrate the semicircular tool 100 through the central shaft 2, so that the welding stress is homogenized and released, and the welding deformation is reduced.
As shown in fig. 13, the device further comprises a positioning pin 10, the left side of the central shaft 2 is connected with the positioning pin 10 in a sliding manner, the left side of the top of the support 1 is provided with an arc-shaped clamping groove in vertical arrangement, and the positioning pin 10 is positioned in the arc-shaped clamping groove. When need not to rotate center pin 2, can insert locating pin 10 in center pin 2 left side to with center pin 2 fixed, avoid center pin 2 rotation at will, when needs rotate center pin 2, can pull out locating pin 10 and rotate center pin 2, after center pin 2 rotated one hundred eighty degrees, insert locating pin 10 in center pin 2 again can, so, just can be when center pin 2 need not rotate, with center pin 2 fixed, avoid center pin 2 rotation at will.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (8)

1. A group welding frock of single spiral reel, its characterized in that: including support (1), center pin (2), flange (21), arc locking card (31) and clamping assembly, arc wall has all been seted up at support (1) both sides top, center pin (2) have been placed between the arc wall of both sides, center pin (2) both sides all are connected with flange (21), center pin (2) are used for supporting semicircle type frock (100), arc locking card (31) are provided with a plurality of and quantity is the even number, arc locking card (31) both sides all are connected with connecting block (32), connecting block (32) are used for fixing two arc locking card (31), be circular and can the suit on semicircle type frock (100) when the terminal surface of two arc locking card (31) are pasted mutually for push down semicircle type frock (100), be equipped with the clamping assembly who is used for centre gripping semicircle type frock (100) on flange (21).
2. The assembly welding tool for a single-spiral screen frame according to claim 1, wherein: the clamping assembly comprises a connecting frame (41), clamping blocks (42) and a screw rod (43), wherein the middle parts of the upper side and the lower side of the convex disc (21) on one side are all connected with the connecting frame (41) in a sliding mode, the clamping blocks (42) are all connected to the two connecting frames (41) in a sliding mode, the screw rod (43) is connected to the two connecting frames (41) in a rotating mode, and the screw rod (43) is in threaded connection with the clamping blocks (42).
3. The assembly welding tool for a single-spiral screen frame according to claim 2, wherein: the support assembly comprises a guide seat (51), a support bracket (52) and an electric push rod (53), wherein the lower parts of two sides of the support (1) are respectively connected with the guide seat (51), the support bracket (52) is connected between the guide seats (51) at two sides in a sliding mode, at least one electric push rod (53) is arranged on the support (1), and a telescopic rod of the electric push rod (53) is connected with the support bracket (52).
4. A single spiral screen frame assembly welding fixture as recited in claim 3, wherein: the novel lock is characterized by further comprising locking blocks (7), wherein the middle parts of two sides of the arc-shaped locking card (31) are respectively connected with the locking blocks (7), and clamping grooves are formed in the support brackets (52) and used for clamping the locking blocks (7).
5. A single spiral screen frame assembly welding fixture as recited in claim 3, wherein: still including drive loose knot subassembly, drive loose knot subassembly is including rack (61), drive gear (62), ring gear (63) and drive gear (64), support bracket (52) top is connected with rack (61), two screw rods (43) one side all is connected with drive gear (62), rack (61) removal can rub drive gear (62) rotatory, rotationally be connected with ring gear (63) on center pin (2), two screw rods (43) opposite side all are connected with drive gear (64), drive gear (64) and ring gear (63) meshing.
6. The assembly welding tool for a single-spiral screen frame according to claim 1, wherein: still including mount pad (81) and locating plate (82), wherein one side flange (21) both sides middle part all is connected with mount pad (81), and logical groove has all been seted up at flange (21) both sides middle part, and locating plate (82) can pass both sides logical groove, and locating plate (82) can be installed in mount pad (81) department through the bolt for it is fixed with locating plate (82).
7. The assembly welding tool for a single-spiral screen frame according to claim 1, wherein: the device also comprises a vibrating machine (9), wherein the vibrating machine (9) is arranged on the support (1), and the vibrating end of the vibrating machine (9) is contacted with the central shaft (2).
8. The assembly welding tool for a single-spiral screen frame according to claim 1, wherein: the positioning device is characterized by further comprising a positioning pin (10), wherein the positioning pin (10) is connected to the left side of the central shaft (2) in a sliding manner, an arc-shaped clamping groove is formed in one side of the top of the support (1), and the positioning pin (10) is positioned in the arc-shaped clamping groove.
CN202310393606.5A 2023-04-13 2023-04-13 Assembly welding tool for single spiral screen frame Pending CN116214054A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310393606.5A CN116214054A (en) 2023-04-13 2023-04-13 Assembly welding tool for single spiral screen frame

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310393606.5A CN116214054A (en) 2023-04-13 2023-04-13 Assembly welding tool for single spiral screen frame

Publications (1)

Publication Number Publication Date
CN116214054A true CN116214054A (en) 2023-06-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310393606.5A Pending CN116214054A (en) 2023-04-13 2023-04-13 Assembly welding tool for single spiral screen frame

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116690084A (en) * 2023-08-02 2023-09-05 汶瑞机械(山东)有限公司 Assembly welding tool for single spiral screen frame

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116690084A (en) * 2023-08-02 2023-09-05 汶瑞机械(山东)有限公司 Assembly welding tool for single spiral screen frame
CN116690084B (en) * 2023-08-02 2023-11-24 汶瑞机械(山东)有限公司 Assembly welding tool for single spiral screen frame

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