CN111992997A - Preparation method of thick plate welding assembly - Google Patents
Preparation method of thick plate welding assembly Download PDFInfo
- Publication number
- CN111992997A CN111992997A CN202010870678.0A CN202010870678A CN111992997A CN 111992997 A CN111992997 A CN 111992997A CN 202010870678 A CN202010870678 A CN 202010870678A CN 111992997 A CN111992997 A CN 111992997A
- Authority
- CN
- China
- Prior art keywords
- positioning
- hole
- plate
- piece
- bending
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention discloses a preparation method of a thick plate welding assembly, which relates to the field of welding, wherein the thick plate welding assembly comprises a bending piece and a circular pipe, the bending piece and the circular pipe are connected through a connecting lug, and the bending piece and the connecting lug are integrally formed; the bending piece comprises a connecting part, the connecting lugs are arranged on the connecting part, bending parts are symmetrically arranged on two sides of the connecting part, a guide hole is formed in the connecting part, a through hole is formed in the position, corresponding to the guide hole, of the circular tube, and a flanging hole is formed in one end, away from the connecting part, of each bending part; the preparation method comprises the following steps: adopt the ordinary punching of modulus of continuity to make the piece of bending, adopt the position degree to examine the utensil and carry out the position degree detection to the piece of bending: the comprehensive detection tool is used for comprehensively detecting the bent part: and processing a round pipe, welding the round pipe with a bent part, and extruding the round pipe on the welded thick plate welding assembly by using a press machine. The invention can improve the production efficiency and the detection efficiency.
Description
Technical Field
The invention relates to the field of welding, in particular to a preparation method of a thick plate welding assembly.
Background
The shifting fork thick plate welding assembly with the thickness of about 5mm is an important assembly in a gear shifting part of a gearbox, the market demand is large, the shifting fork thick plate welding assembly generally comprises a round pipe and a bending piece, the round pipe is made of low-carbon steel and is welded on the bending piece with a guide hole, the welding position degree requirement is strict, the hole tolerance is small, and the hole tolerance is usually 0.018 mm; the bending piece is mostly made of cold-forming hot-rolling pickling automobile structural steel, the width of the bending piece is narrow, the arm is long, and the arm is bent for multiple times.
When producing bent pieces, the following methods are mostly adopted: a. the single-process die forming method needs 1-time skip stamping and 3-time bending in one-time production, needs a large amount of time and labor, and is high in cost and low in efficiency; b. continuous die forming, the positioning precision of the jumping step in the method is low, and the punching sequence is difficult to determine; simultaneously, because the width of the piece of bending is narrower, the arm is longer, and intensity is lower, when adopting conventional vibration to carry out burring, impurity operation, can lead to the piece of bending to warp when bumping between the part.
The guide hole is usually reamed by using a traditional reamer, and the problems of low efficiency, overlarge pore size, reduced pore size after reaming, overlarge roughness in the hole, serious reamer abrasion and the like exist.
When carrying out the welding to the pipe and the piece of bending, because traditional manual welding technology receives the human factor influence great, the precision is lower, the quality uniformity is poor, progressively be replaced by the robot welding, in the robot welding, frock clamp is one of the basic element who ensures spare part welding process quality, choose for use suitable welding frock clamp not only can effectual assurance product manufacturing precision, can also alleviate workman's intensity of labour greatly, improve the productivity of the mill, reduce the manufacturing cost of enterprise, the safety of effectual assurance production, the economic benefits of enterprise is improved, and the frock clamp effect of using at present is relatively poor.
When the product quality is detected, a precision three-coordinate measuring machine is generally used for measuring at present, the coordinate measuring precision of the measuring machine can reach micron level, the space size can be measured, but the efficiency is low, and the method is not suitable for large-scale rapid detection in the manufacturing industry.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a preparation method of a thick plate welding assembly, which can improve the production efficiency and the detection efficiency.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
a preparation method of a thick plate welding assembly comprises a bending piece and a round pipe, wherein the bending piece and the round pipe are connected through a connecting lug and are integrally formed;
the bending piece comprises a connecting part, the connecting lug is arranged on the connecting part, bending parts are symmetrically arranged on two sides of the connecting part, a guide hole is formed in the connecting part, a through hole is formed in the position, corresponding to the guide hole, of the circular pipe, and a flanging hole is formed in one end, away from the connecting part, of each bending part;
the preparation method of the thick plate welding assembly comprises the following steps:
s1, preparing a bending piece by adopting a progressive die through common punching, wherein a connecting part of the bending piece is provided with a connecting lug;
s2, adopting the position degree checking fixture to carry out position degree detection on the bent piece: the position degree gauge comprises a bottom plate, a first fixing block, a second fixing block and a third fixing block are sequentially arranged at the top of the bottom plate, the first fixing block and the third fixing block are symmetrically distributed on two sides of the second fixing block, first positioning holes are formed in the first fixing block and the third fixing block, a first detection pin is arranged in each first positioning hole, and a first positioning nail is arranged at the top of the second fixing block;
s3, carrying out comprehensive detection on the bent part by using the comprehensive detection tool: the comprehensive detection check tool comprises a detection plate, a positioning block and a fixing plate are arranged at the top of the detection plate, a positioning plate, a second detection pin and a positioning pin are arranged at the top of the fixing plate, the second detection pin is movable, a second positioning hole is formed in the positioning plate, a second positioning nail is arranged in the second positioning hole, the positioning plate comprises two opposite side edges, when the bending piece is placed on the comprehensive detection check tool, the second positioning hole corresponds to a square hole in the connecting part, the square hole of the connecting part penetrates through the second positioning nail for fixation, a certain distance is reserved between two sides of the connecting lug and the corresponding side edges, the second detection pin is placed below the connecting part, and the distance between the bottom of the connecting part and the top of the detection plate is detected;
the positioning block is provided with a cover plate, a first side plate and a second side plate are symmetrically distributed on two sides of the positioning block, a first through hole is reserved between the positioning block and the cover plate, an adjusting bolt is arranged at the top of the first through hole, a pressing block is arranged in the first through hole, the adjusting bolt can push the pressing block downwards to enable the pressing block to move downwards, supporting blocks are arranged on two sides of the pressing block, when the pressing block moves downwards, the supporting blocks are pushed to move towards two sides, fixing holes and fixing pins are arranged at positions, corresponding to the first through hole, of the first side plate and the second side plate, one end of each fixing pin is located on the outer side, away from the first through hole, of each fixing hole, and the other end of each fixing;
s4, processing a circular tube and welding the circular tube with a bent piece;
and S5, extruding the round pipe on the welded thick plate welding assembly by using a press machine.
Further, the step S4 of processing the circular tube and welding the circular tube and the bent piece specifically includes the following steps: and clamping the circular tube and the bending piece by using a welding fixture, adjusting the circular tube and the bending piece to a welding position, and then welding.
Furthermore, the welding fixture comprises a fixture bottom plate, a bending clamping piece and a circular tube clamping piece are arranged at the top of the fixture bottom plate, the circular tube clamping piece comprises a first sliding assembly, a circular tube supporting piece and two groups of conical positioning pins, the two groups of conical positioning pins are distributed at two ends of the circular tube supporting piece, and the first sliding assembly can push the conical positioning pins to move towards the circular tube supporting piece, so that the end parts of the conical positioning pins are inserted into the circular tube and fix the circular tube;
the first sliding assembly comprises a first sliding cylinder and a second sliding cylinder, the first sliding cylinder and the second sliding cylinder are both connected with a first sliding platform and push the first sliding platform to move, and the two first sliding platforms can move in opposite directions;
one of the first sliding platforms is provided with a first positioning frame, the other first sliding platform is provided with a second positioning frame, and the first positioning frame and the second positioning frame are used for fixing the conical positioning pin;
the clamping piece of bending includes second slip subassembly and two positioning seats, the positioning seat is fixed on the second slip subassembly, just the positioning seat can slide along with the second slip subassembly, the second slip subassembly includes third slip cylinder, fourth slip cylinder and two relative second slip platforms that set up, third slip cylinder, fourth slip cylinder are used for promoting the second slip platform and slide, the positioning seat is connected on corresponding second slip platform, be provided with the location axle on the positioning seat, still be provided with the third locating rack on the first slip platform, be provided with the connecting piece on the third locating rack, bend the turn-ups hole of clamping piece and can insert in the connecting piece of third locating rack, the location axle can be under the drive of positioning seat to connecting piece direction motion and pass the turn-ups hole and will bend the clamping piece fixed.
Furthermore, the conical positioning pin comprises a conical front end, a positioning block, a butting piece and a connecting end which are connected in sequence, the outer diameter of the positioning block is 15mm, the upper tolerance is 0.002mm, and the lower tolerance is-0.005 mm.
Further, in step S2, the step of detecting the position degree of the bent part by using the position degree detector includes: the connecting lug of the bending piece is placed on the second fixing block, the flanging hole corresponds to the first positioning hole, the first positioning nail penetrates through the guide hole and then is connected with the second fixing block, the bending piece is fixed, the first detection pin is inserted into the corresponding first positioning hole and inserted into the flanging hole, whether the position degree of the flanging hole is 0.25 or not is judged, if yes, the current bending piece is a qualified product, and if not, the current bending piece is unqualified.
Further, in the step S3, the step of performing comprehensive detection on the bent part by using the comprehensive detection tool specifically includes the following steps: placing the bent piece on the comprehensive detection check tool, inserting the guide hole into the second positioning nail and fixing the bent piece, pushing the fixing pin to move towards the flanging hole and insert the flanging hole, adjusting the adjusting bolt to push the pressing block downwards, and pushing the supporting block to move towards two sides and tightly press the connecting part until the connecting part is fixed;
inserting a first check gauge between the flanging hole and the corresponding first side plate and second side plate, and judging whether the distance is within 63.3-63.7 mm, if so, determining to be qualified, otherwise, determining to be unqualified; inserting a first check gauge between the connecting lug and the side edge of the positioning plate, judging whether the distance is within 14.5-15.5 mm, if so, determining to be qualified, otherwise, determining to be unqualified; inserting a second detection gauge and a third detection gauge between the connecting lug and the positioning pin, and judging whether the radius of the connecting lug is within 11.7-12.05 mm, if so, the connecting lug is qualified, and if not, the connecting lug is unqualified.
Further, the first inspection gauge comprises three sections of round tubes which are connected in sequence, the lengths of the round tubes are 50mm, 40mm and 50mm in sequence, and the diameters of the round tubes at the front section and the rear section are 5.85mm and 6.15mm respectively; the second inspection gauge is a hollow round pipe, the inner diameter of the round pipe is 15mm, the upper tolerance is-0.01 mm, and the lower tolerance is-0.02 mm; the outer diameter of the round tube is 23.4mm, and the upper tolerance is 0.01 mm; the third inspection gauge is a hollow round pipe, the inner diameter of the round pipe is 15mm, the upper tolerance is-0.01 mm, and the lower tolerance is-0.02 mm; the outer diameter of the round tube is 24.1mm, and the lower tolerance is 0.01 mm.
Further, the following steps are also included between the steps S3 and S4: putting the bent piece into a trolley furnace for drying oil, and burning stretching oil on the surface of the bent piece into oxide skin so as to remove the residual stretching oil on the surface of the bent piece; on the basis, shot blasting is carried out by using a vertical shot blasting machine with grit of 0.3 mm.
Further, use a crowded hole anchor clamps when crowded hole is carried out to the pipe on the thick plate welding subassembly after welding in step S5, crowded hole anchor clamps include crowded hole bottom plate and crowded stick, and the bottom of crowded stick is 90 spheres, is provided with crowded stick passageway and steel ball passageway on the crowded hole bottom plate, and the bottom of crowded hole bottom plate is provided with the profile modeling groove, crowded stick can insert in crowded stick passageway, the profile modeling inslot can be put into to the bottom of pipe, the slope of steel ball passageway sets up, and the steel ball of being convenient for falls at the assigned position after extruding from the pipe.
Further, the step S5 of extruding the circular tube on the welded thick plate welding assembly specifically includes the following steps: the hole extrusion bottom plate is fixed on a press base, the extrusion rod is fixed on an upper fixing plate of a press machine, the extrusion rod is located above an extrusion rod channel, the extrusion rod channel is located above a position, to be extruded, of a circular pipe, the lower portion of the circular pipe on the thick plate welding assembly is placed in an imitated groove of the extrusion hole bottom plate, a steel ball is placed at the position, to be extruded, of the circular pipe to start the press machine, and the upper fixing plate moves downwards to drive the extrusion rod to extrude the steel ball and complete hole extrusion at the position, to be extruded, of the circular pipe.
Compared with the prior art, the invention has the advantages that:
(1) according to the manufacturing method of the thick plate welding assembly, the bent parts are effectively screened through the position degree detection tool and the comprehensive detection tool, compared with the method that a precise three-coordinate measuring machine is used for measuring in the prior art, the efficiency is high, the cost is low, large batches of bent parts can be quickly detected, the detection precision is high, and products with high qualified rate can be obtained.
(2) The invention relates to a preparation method of a thick plate welding assembly, which comprises the steps of using a 500T closed double-point press machine to carry out continuous die common punching forming to obtain a bent piece, punching a guide hole on a raw material, punching a flanging pre-punched hole at the position of a flanging hole, punching a square hole at the position of the guide hole, flanging a connecting part, and then bending and forming to obtain a connecting lug; stripping and flanging again, stripping and chamfering, and continuously stripping for three times; chamfering; chamfering and performing idle operation; bending to shaping many times in succession, punching a hole to the guiding hole position again, obtain the piece of bending, carried out twice chamfer when carrying out general towards shaping promptly, the big burr on bending can be got rid of to the chamfer, when having avoided adopting conventional vibration to carry out burring, impurity operation, can lead to the piece of bending to warp when bumping between the part, has effectively improved the rate of utilization of the piece of bending, and then has reduced manufacturing cost.
(3) According to the preparation method of the thick plate welding assembly, when the bending piece is subjected to common-punch forming, the surface of the bending piece is coated with the tensile oil, the viscosity of the tensile oil is high, the tensile oil is mainly removed through shot blasting at present, however, if the tensile oil is completely removed, shot blasting needs to be carried out for a long time, the roughness of the surface of the bending piece is low, and if the shot blasting time is short, impurities in holes are difficult to clean; in the embodiment, the bending piece is put into a trolley furnace for oil drying, the stretching oil on the surface of the bending piece is burnt into oxide skin, and the residual stretching oil on the surface of the bending piece is removed; on this basis, use vertical shot-blasting machine to throw the ball with 0.3 mm's grit, can make the roughness on a surface of bending reach within Ra3.2 of demand in 6 minutes, effectively shorten the shot-blasting time, reduce and throw the ball cost.
(4) According to the preparation method of the thick plate welding assembly, the welding clamp can position and lock the bending piece and the round pipe to be welded, the directions of stress and deformation can be controlled, the relative positions of all parts are accurate, and the yield is improved.
Drawings
FIG. 1 is a schematic view of a thick plate weld assembly according to an embodiment of the present invention;
FIG. 2 is a top view of FIG. 1 taken along the direction of the pipe;
FIG. 3 is a schematic view of the production of a bent piece;
FIG. 4 is a schematic structural view of the position degree gauge;
FIG. 5 is a schematic structural view of the comprehensive detection tool;
FIG. 6 is a cross-sectional view taken along A-A of FIG. 5;
FIG. 7 is a cross-sectional view taken along line B-B of FIG. 5;
FIG. 8 is a top view of FIG. 5;
FIG. 9 is a schematic structural view of a welding fixture;
FIG. 10 is a schematic view of a tapered locating pin;
FIG. 11 is a schematic view of a hole-extruding fixture;
fig. 12 is a cross-sectional view of the orifice plate of fig. 11.
In the figure: 1-a bent piece, 2-a round tube, 3-a lug, 4-a joint, 5-a bent part, 6-a guide hole, 7-a flanging hole, 8-a base plate, 9-a foot, 10-a first fixing block, 11-a second fixing block, 12-a third fixing block, 13-a first detection pin, 14-a first positioning pin, 15-a detection plate, 16-a support plate, 17-a positioning block, 18-a fixing plate, 19-a positioning plate, 20-a second detection pin, 21-a positioning pin, 23-a second positioning pin, 24-a side edge, 25-a cover plate, 26-a first side plate, 27-a second side plate, 28-a first through hole, 29-a press block, 30-a support block, 31-a fixing hole, 32-a fixing pin, 33-a clamp bottom plate, 34-a bending clamping piece, 35-a circular tube clamping piece, 36-a conical positioning pin, 37-a first sliding component, 38-a first sliding platform, 39-a first sliding cylinder, 40-a second sliding cylinder, 41-a positioning seat, 42-a second sliding component, 43-a second sliding platform, 44-a third sliding cylinder, 45-a fourth sliding cylinder, 46-a third positioning frame, 47-a positioning shaft, 48-a first positioning frame, 49-a conical front end, 50-a positioning block, 51-a supporting piece, 52-a connecting end, 53-an extrusion hole bottom plate, 54-an extrusion rod, 55-an extrusion rod channel, 56-a steel ball channel and 57-a profiling groove.
Detailed Description
Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Referring to fig. 1 and 2, an embodiment of the present invention provides a thick plate welding assembly, including a bending member 1 and a circular tube 2, where the bending member 1 and the circular tube 2 are connected by a connecting lug 3, the bending member 1 and the connecting lug 3 are integrally formed, the connecting lug 3 in this embodiment is a concave arc structure (circular arc shape), and an inner diameter of the concave arc structure is adapted to an outer diameter of the circular tube 2, the circular tube 2 can be placed inside the concave arc structure, an outer wall of the circular tube 2 abuts against an inner wall of the concave arc structure, a top of the concave arc structure abuts against an outer wall of the circular tube 2 (when welding, a contact point between the top of the concave arc structure and the outer wall of the circular tube 2 is a welding point), a central angle of the concave arc structure is 90 degrees, and in actual production, a diameter of the circular tube 2 is set according to actual needs, in this embodiment, an outer diameter of the circular tube 2 is 23.1 to 23.2mm, an inner diameter is 15mm, and an, the lower tolerance is-0.016 mm, and the radius of the concave arc structure is 11.7-12.05 mm.
The bending piece 1 comprises a connecting portion 4, a connecting lug 3 is arranged on the connecting portion 4 (the connecting lug 3 is turned over through the connecting portion 4 to be manufactured), bending portions 5 are symmetrically arranged on two sides of the connecting portion 4, guide holes 6 are formed in the connecting portion 4, through holes are formed in the positions, corresponding to the guide holes 6, of the circular tube 2, and the end, away from the connecting portion 4, of each bending portion 5 is provided with a turning hole 7.
The piece 1 of bending chooses the cold forming hot rolling pickling car structural steel that thickness is 5 0.1mm to make for use, and the piece 1 of bending is arc, and the diameter of this circular arc place circle is 114 0.1mm, and in this embodiment, the piece 1 of bending is semi-circular, and the diameter of flanging hole 7 is 10.065 ~ 10.106 mm.
Referring to fig. 3, the method for producing the bending member 1, which uses a 500T closed double-point press for continuous die stamping and forming, operates according to the corresponding instructions in the field, and comprises the following steps:
punching a guide hole on the raw material, punching a flanging pre-punching hole at the position of the flanging hole 7, punching a square hole at the position of the guide hole 6, and flanging the connecting part 4 to obtain a connecting lug 3 through subsequent bending forming; stripping and flanging again, stripping and chamfering, and continuously stripping for three times; chamfering; chamfering and performing idle operation; and continuously bending for many times until forming, and punching the position of the guide hole 6 to obtain the bent piece 1.
In this embodiment, twice chamfers are carried out when the general punching is formed, the big burr on the piece 1 of bending can be got rid of to the chamfer, when having avoided adopting conventional vibration to carry out burring, impurity operation, can lead to the piece 1 of bending to warp when bumping between the part, has effectively improved the rate of utilization of the piece 1 of bending, and then has reduced manufacturing cost.
Meanwhile, the flanging hole 7 is formed by adopting a pre-punching process in the embodiment, so that the problem of insufficient direct flanging material is solved; the root of the flanging hole 7 is of an arc-shaped structure corresponding to the bending part 5, so that the strength of the flanging hole can be improved.
Carrying out position degree detection on the bent part 1:
referring to fig. 3, the position degree detection tool comprises a bottom plate 8, a pad 9 is arranged at the bottom of the bottom plate 8, a first fixing block 10, a second fixing block 11 and a third fixing block 12 are sequentially arranged at the top of the bottom plate 8, the first fixing block 10 and the third fixing block 12 are symmetrically distributed on two sides of the second fixing block 11, first positioning holes (the positions of the first positioning holes correspond to the flanging holes 7) are formed in the first fixing block 10 and the third fixing block 12, a first detection pin 13 is arranged in each positioning hole, and a first positioning nail 14 is arranged at the top of the second fixing block 11.
When the position degree of the folded and bent piece 1 is detected, connecting lugs 3 of the bent piece 1 are placed on a second fixing block 11, flanging holes 7 correspond to first positioning holes, a first positioning nail 14 is connected with the second fixing block 11 after penetrating through a guide hole 6 of the bent piece 1, the first positioning nail 14 is pressed by a quick pressing device, the bent piece 1 is fixed, a first detection pin 13 is inserted into the corresponding first positioning hole and inserted into the flanging holes 7, whether the position degree of the flanging holes 7 is within 0.25 is judged, if yes, the bent piece 1 is a qualified product at present, and if not, the bent piece is unqualified.
Carrying out comprehensive detection on the bent part 1:
the comprehensive detection tool comprises a detection plate 15, a positioning block 17 and a fixing plate 18 are arranged at the top of the detection plate 15, a positioning plate 19, a second detection pin 20 and a positioning pin 21 are arranged at the top of the fixing plate 18, the second detection pin 20 is movable, a second positioning hole is formed in the positioning plate 19, a second positioning nail 23 is arranged in the second positioning hole, the positioning plate 19 comprises two opposite side edges 24, when the bending piece 1 is placed on the comprehensive detection tool, the second positioning hole corresponds to a square hole in the connecting portion 4, the square hole in the connecting portion 4 penetrates through the second positioning nail 23 to be fixed, a certain distance is reserved between two sides of the connecting lug 3 and the corresponding side edges 24, the second detection pin 20 is placed below the connecting portion 4, and the distance between the bottom of the connecting portion 4 and the top of the detection plate 15 is detected.
Be provided with the apron 25 on the locating piece 17, the bilateral symmetry of locating piece 17 distributes and has first curb plate 26 and second curb plate 27, leave first through-hole 28 between locating piece 17 and the apron 25, the top of first through-hole 28 is provided with an adjusting bolt, the inside of first through-hole 28 is provided with briquetting 29, adjusting bolt can push away briquetting 29 downwards, make briquetting 29 move downwards, the both sides of briquetting 29 are provided with bracer 30, bracer 30 is including the wedge that sets up in order, spring and top ejector pad, when briquetting 29 moves downwards, promote the bracer 30 and move to both sides, first curb plate 26, second curb plate 27 is provided with fixed orifices 31 and fixed pin 32 with the corresponding place of first through-hole 28, the one end of fixed pin 32 is located the outside that first through-hole 28 was kept away from to fixed orifices 31, the other end is located fixed orifices 31.
When the bending tool is used, the bending part 1 is placed on the comprehensive detection tool, the guide hole 6 is inserted into the second positioning nail 23 and fixed, the fixing pin 32 is pushed to move towards the flanging hole 7 and inserted into the flanging hole 7, the adjusting bolt is adjusted to push the pressing block 29 downwards, the pressing block 29 moves downwards and pushes the supporting block 30 to move towards two sides and tightly press the connecting part 4 until the connecting part 4 is fixed.
Inserting a first check gauge between the flanging hole 7 and the corresponding first side plate 26 and second side plate 27, and judging whether the distance is within 63.3-63.7 mm, if so, determining that the product is qualified, otherwise, determining that the product is unqualified; inserting a first check gauge between the connecting lug 3 and the side edge 24 of the positioning plate 19, judging whether the distance is within 14.5-15.5 mm, if so, determining to be qualified, otherwise, determining to be unqualified; inserting a second detection gauge and a third detection gauge between the connecting lug 3 and the positioning pin 21, and judging whether the radius of the connecting lug 3 is within 11.7-12.05 mm, if so, the connecting lug is qualified, and if not, the connecting lug is unqualified.
The first inspection gauge comprises three sections of round tubes which are connected in sequence, the lengths of the round tubes are 50mm, 40mm and 50mm in sequence, the diameters of the round tubes at the front section and the rear section are respectively 5.85mm, the upper tolerance is 0.01mm, and the lower tolerance is 0.01 mm; the second inspection gauge is a hollow round pipe, the inner diameter of the round pipe is 15mm, the upper tolerance is-0.01 mm, and the lower tolerance is-0.02 mm; the outer diameter of the round tube is 23.4mm, and the upper tolerance is 0.01 mm; the third inspection gauge is a hollow round pipe, the inner diameter of the round pipe is 15mm, the upper tolerance is-0.01 mm, and the lower tolerance is-0.02 mm; the outer diameter of the round tube is 24.1mm, and the lower tolerance is 0.01 mm.
Performing oil drying and shot blasting
Because the piece 1 of bending when carrying out general towards shaping, its surface coating has tensile oil, and the viscidity of tensile oil is great, mainly gets rid of through throwing the ball at present, but if will get rid of tensile oil completely, need carry out the shot-blasting of longer time, lead to the roughness on 1 surface of piece of bending lower, if throw the ball time shorter, be difficult to clear away downthehole impurity totally.
In the embodiment, the bending piece 1 is put into a trolley furnace for oil drying, the stretching oil on the surface of the bending piece 1 is burnt into oxide skin, and then the stretching oil remained on the surface of the bending piece 1 is removed; on this basis, use vertical shot-blasting machine to throw the ball with 0.3 mm's grit, can make the roughness on 1 surface of bending reach within Ra3.2 of demand in 6 minutes, effectively shorten the shot-blasting time, reduce and throw the ball cost.
Welding of
Manufacturing round tube by machining after cutting seamless steel tube
Because in the welding process, welding stress and cold-hot deformation often can lead to the relative position inaccuracy of each part, consequently, this embodiment uses a welding jig to treat welded 1 and the pipe 2 of bending and fix a position and lock to the direction of control stress and deformation guarantees that the relative position of each part is more accurate.
Referring to fig. 8, 9 and 10, the welding jig of the present invention includes a jig bottom plate 33, a bending clamping member 34 and a circular tube clamping member 35 are disposed on the top of the jig bottom plate 33, the circular tube clamping member 35 includes a first sliding assembly 37, a circular tube supporting member and two sets of tapered positioning pins 36, the two sets of tapered positioning pins 36 are distributed at two ends of the circular tube supporting member, and the first sliding assembly 37 can push the tapered positioning pins 36 to move towards the circular tube supporting member, so that the end portions of the tapered positioning pins 36 are inserted into the circular tube 2 and fix the circular tube 2.
The conical positioning pin 36 comprises a conical front end 49, a positioning block 50, a butting part 51 and a connecting end 52 which are connected in sequence, the outer diameter of the positioning block 50 is 15mm, the upper tolerance is 0.002mm, the lower tolerance is-0.005 mm, when the conical positioning pin is used, the round pipe 2 is sleeved on the positioning block 50 through the conical front end 49, the round pipe 2 can be sleeved quickly, and the positioning precision and the efficiency are high.
The first sliding assembly 37 comprises a first sliding cylinder 39 and a second sliding cylinder 40, the first sliding cylinder 39 and the second sliding cylinder 40 are both connected with a first sliding platform 38 and push the first sliding platform 38 to move, and the two first sliding platforms 38 can move towards each other.
One of the first sliding platforms 38 is provided with a first positioning frame 48, the other first sliding platform 38 is provided with a second positioning frame, and the first positioning frame 48 and the second positioning frame are used for fixing the tapered positioning pin 36.
Bending clamping piece 34 includes second subassembly 42 and two positioning seats 41 that slide, positioning seat 41 is fixed on second subassembly 42 that slides, and positioning seat 41 can slide along with second subassembly 42 that slides, second subassembly 42 that slides includes third cylinder 44 that slides, fourth cylinder 45 that slides and two relative second platforms 43 that set up, third cylinder 44 that slides, fourth cylinder 45 that slides are used for promoting second platform 43 that slides, positioning seat 41 connects on corresponding second platform 43 that slides, be provided with location axle 47 on positioning seat 41.
The first sliding platform 38 is further provided with a third positioning frame 46, the third positioning frame 46 is provided with a connecting piece, the flanging hole 7 of the bending clamping piece 34 can be inserted into the connecting piece of the third positioning frame 46, and the positioning shaft 47 can move towards the connecting piece direction under the driving of the positioning seat 41 and penetrates through the flanging hole 7 to fix the bending clamping piece 34.
When the bending machine is used, the circular tube 2 is fixed, then the bending piece 1 is fixed, the first sliding cylinder 39, the second sliding cylinder 40, the third sliding cylinder 44 and the fourth sliding cylinder 45 are started to adjust the relative positions of the bending piece 1 and the circular tube 2, and the bending piece 1 and the circular tube 2 reach the corresponding welding positions and are welded.
Referring to fig. 11 and 12, the extrusion holes: use the press to carry out the crowded hole to pipe 2 on the thick plate welded component after welding, in order to improve the precision and the efficiency in crowded hole, this embodiment uses a crowded hole anchor clamps, crowded hole anchor clamps include crowded hole bottom plate 53 and crowded stick 54, the bottom of crowded stick 54 is 90 spheres, be provided with crowded stick passageway 55 and steel ball passageway 56 on the crowded hole bottom plate 53, the bottom of crowded hole bottom plate 53 is provided with profile groove 57, crowded stick 54 can insert in crowded stick passageway 55, profile groove 57 can be put into to the bottom of pipe 2, steel ball passageway 56 inclines to set up, be convenient for the steel ball to fall at the assigned position after 2 extrudes from pipe, the diameter of steel ball passageway is 16mm, the diameter of steel ball is 15.02mm, the unilateral clearance that leaves 0.49mm on the steel ball passageway is abdomed, be convenient for the steel ball passes through smoothly.
The hole extrusion specifically comprises the following steps: the hole extrusion bottom plate 53 is fixed on a press base, the extrusion rod 54 is fixed on an upper fixing plate of a press machine, the extrusion rod 54 is located above an extrusion rod channel 55, the extrusion rod channel 55 is located above a to-be-extruded hole position of the circular tube 2, the lower portion of the circular tube 2 on the thick plate welding assembly is placed in an imitated groove 57 of the extrusion bottom plate 53, a steel ball is placed at the to-be-extruded hole position of the circular tube 2 to start the press machine, the upper fixing plate moves downwards to drive the extrusion rod 54 to extrude the steel ball and complete extrusion at the to-be-extruded hole position on the circular tube 2, and the steel ball falls into the steel ball channel 56 and enters a collection position.
The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by anyone with the teaching of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as the present invention, are within the protection scope.
Claims (10)
1. A method for preparing a thick plate welding component is characterized by comprising the following steps: the thick plate welding assembly comprises a bending piece (1) and a round pipe (2), the bending piece (1) and the round pipe (2) are connected through a connecting lug (3), and the bending piece (1) and the connecting lug (3) are integrally formed;
the bending piece (1) comprises a connecting part (4), the connecting lugs (3) are arranged on the connecting part (4), bending parts (5) are symmetrically arranged on two sides of the connecting part (4), a guide hole (6) is formed in the connecting part (4), a through hole is formed in the position, corresponding to the guide hole (6), of the circular tube (2), and a flanging hole (7) is formed in one end, away from the connecting part (4), of each bending part (5);
the preparation method of the thick plate welding assembly comprises the following steps:
s1, preparing a bending piece (1) by adopting a progressive die through common punching, wherein a connecting lug (3) is arranged on a connecting part (4) of the bending piece (1);
s2, adopting the position degree checking fixture to detect the position degree of the bent part (1): the position degree gauge comprises a bottom plate (8), a first fixing block (10), a second fixing block (11) and a third fixing block (12) are sequentially arranged at the top of the bottom plate (8), the first fixing block (10) and the third fixing block (12) are symmetrically distributed on two sides of the second fixing block (11), first positioning holes are formed in the first fixing block (10) and the third fixing block (12), a first detection pin (13) is arranged in each first positioning hole, and a first positioning nail (14) is arranged at the top of the second fixing block (11);
s3, carrying out comprehensive detection on the bent part (1) by using the comprehensive detection tool: the comprehensive detection check tool comprises a detection plate (15), a positioning block (17) and a fixing plate (18) are arranged at the top of the detection plate (15), a positioning plate (19), a second detection pin (20) and a positioning pin (21) are arranged at the top of the fixing plate (18), the second detection pin (20) is movable, a second positioning hole is formed in the positioning plate (19), a second positioning nail (23) is arranged in the second positioning hole, the positioning plate (19) comprises two opposite side edges (24), when the bending piece (1) is placed on the comprehensive detection check tool, the second positioning hole corresponds to a square hole in the connecting part (4), the square hole in the connecting part (4) penetrates through the second positioning nail (23) for fixation, a certain distance is reserved between the two sides of the connecting lug (3) and the corresponding side edges (24), and the second detection pin (20) is placed below the connecting part (4), detecting the distance between the bottom of the connecting part (4) and the top of the detection plate (15);
the positioning block (17) is provided with a cover plate (25), a first side plate (26) and a second side plate (27) are symmetrically distributed on two sides of the positioning block (17), a first through hole (28) is reserved between the positioning block (17) and the cover plate (25), an adjusting bolt is arranged at the top of the first through hole (28), a pressing block (29) is arranged inside the first through hole (28), the adjusting bolt can push the pressing block (29) downwards to enable the pressing block (29) to move downwards, supporting blocks (30) are arranged on two sides of the pressing block (29), when the pressing block (29) moves downwards, the supporting blocks (30) are pushed to move towards two sides, fixing holes (31) and fixing pins (32) are arranged at positions, corresponding to the first through hole (28), of the first side plate (26) and the second side plate (27), one end of each fixing pin (32) is located on the outer side, away from the first through hole (28), of the fixing hole (31), the other end is positioned in the fixing hole (31);
s4, processing the round pipe (2) and welding the round pipe with the bent piece (1);
and S5, extruding the round pipe (2) on the welded thick plate welding assembly by using a press machine.
2. The method of claim 1, wherein the step of welding the plate to the plate includes the steps of: the step S4 of processing the circular tube (2) and welding the circular tube with the bent piece (1) specifically comprises the following steps: and clamping the circular tube (2) and the bending piece (1) by using a welding fixture, adjusting the circular tube and the bending piece to a welding position, and then welding.
3. The method of claim 2, wherein the step of welding the plate to the plate includes the steps of: the welding fixture comprises a fixture bottom plate (33), a bending clamping piece (34) and a circular tube clamping piece (35) are arranged at the top of the fixture bottom plate (33), the circular tube clamping piece (35) comprises a first sliding assembly (37), a circular tube supporting piece and two groups of conical positioning pins (36), the two groups of conical positioning pins (36) are distributed at two ends of the circular tube supporting piece, and the first sliding assembly (37) can push the conical positioning pins (36) to move towards the circular tube supporting piece, so that the end parts of the conical positioning pins (36) are inserted into the circular tube (2) and fix the circular tube (2);
the first sliding assembly (37) comprises a first sliding cylinder (39) and a second sliding cylinder (40), the first sliding cylinder (39) and the second sliding cylinder (40) are both connected with a first sliding platform (38) and push the first sliding platform to move, and the two first sliding platforms (38) can move oppositely;
one of the first sliding platforms (38) is provided with a first positioning frame (48), the other first sliding platform (38) is provided with a second positioning frame, and the first positioning frame (48) and the second positioning frame are used for fixing the conical positioning pin (36);
the bending clamping piece (34) comprises a second sliding assembly (42) and two positioning seats (41), the positioning seats (41) are fixed on the second sliding assembly (42), the positioning seats (41) can slide along with the second sliding assembly (42), the second sliding assembly (42) comprises a third sliding cylinder (44), a fourth sliding cylinder (45) and two oppositely-arranged second sliding platforms (43), the third sliding cylinder (44) and the fourth sliding cylinder (45) are used for pushing the second sliding platforms (43) to slide, the positioning seats (41) are connected onto the corresponding second sliding platforms (43), positioning shafts (47) are arranged on the positioning seats (41), a third positioning frame (46) is further arranged on the first sliding platform (38), a connecting piece is arranged on the third positioning frame (46), flanging holes (7) of the bending clamping piece (34) can be inserted into the connecting piece of the third positioning frame (46), the positioning shaft (47) can move towards the direction of the connecting piece under the driving of the positioning seat (41) and penetrates through the flanging hole (7) to fix the bending clamping piece (34).
4. The method of claim 3, wherein: the conical positioning pin (36) comprises a conical front end (49), a positioning block (50), a butting piece (51) and a connecting end (52) which are connected in sequence, the outer diameter of the positioning block (50) is 15mm, the upper tolerance is 0.002mm, and the lower tolerance is-0.005 mm.
5. The method of claim 1, wherein the step of welding the plate to the plate includes the steps of: the step S2 of adopting the position degree detection tool to detect the position degree of the bent part (1) comprises the following specific steps: the connecting lug (3) of the bending piece (1) is placed on the second fixing block (11), the flanging hole (7) corresponds to the first positioning hole, the first positioning nail (14) penetrates through the guide hole (6) and then is connected with the second fixing block (11), the bending piece (1) is fixed, the first detection pin (13) is inserted into the corresponding first positioning hole and is inserted into the flanging hole (7), whether the position degree of the flanging hole (7) is within 0.25 is judged, if yes, the bending piece (1) is qualified, and if not, the bending piece is unqualified.
6. The method of claim 1, wherein the step of welding the plate to the plate includes the steps of: in the step S3, the comprehensive detection of the bent part (1) by using the comprehensive detection tool specifically comprises the following steps: placing the bent piece (1) on a comprehensive detection check tool, inserting a guide hole (6) into a second positioning nail (23) and fixing, pushing a fixing pin (32) to move towards the flanging hole (7) and insert into the flanging hole (7), adjusting an adjusting bolt to push a pressing block (29) downwards, and pushing a supporting block (30) to move towards two sides and tightly press the supporting block (30) on the connecting part (4) until the connecting part (4) is fixed, wherein the bending part is a bent part;
inserting a first check gauge between the flanging hole (7) and the corresponding first side plate (26) and second side plate (27), judging whether the distance is within 63.3-63.7 mm, if so, determining that the product is qualified, otherwise, determining that the product is unqualified; inserting a first check gauge between the connecting lug (3) and the side edge (24) of the positioning plate (19), judging whether the distance is within 14.5-15.5 mm, if so, determining to be qualified, otherwise, determining to be unqualified; and inserting a second detection gauge and a third detection gauge between the connecting lug (3) and the positioning pin (21), and judging whether the radius of the connecting lug (3) is within 11.7-12.05 mm, if so, the connecting lug is qualified, and otherwise, the connecting lug is not qualified.
7. The method of claim 6, wherein: the first inspection gauge comprises three sections of round tubes which are connected in sequence, the lengths of the round tubes are 50mm, 40mm and 50mm in sequence, and the diameters of the round tubes at the front section and the rear section are 5.85mm and 6.15mm respectively; the second inspection gauge is a hollow round pipe, the inner diameter of the round pipe is 15mm, the upper tolerance is-0.01 mm, and the lower tolerance is-0.02 mm; the outer diameter of the round tube is 23.4mm, and the upper tolerance is 0.01 mm; the third inspection gauge is a hollow round pipe, the inner diameter of the round pipe is 15mm, the upper tolerance is-0.01 mm, and the lower tolerance is-0.02 mm; the outer diameter of the round tube is 24.1mm, and the lower tolerance is 0.01 mm.
8. The method of claim 1, wherein the step of welding the plate to the plate includes the steps of: the steps between S3 and S4 further include the following steps: putting the bent piece (1) into a trolley furnace for drying oil, and burning the stretching oil on the surface of the bent piece (1) into oxide skin so as to remove the residual stretching oil on the surface of the bent piece (1); on the basis, shot blasting is carried out by using a vertical shot blasting machine with grit of 0.3 mm.
9. The method of claim 1, wherein the step of welding the plate to the plate includes the steps of: use a crowded hole anchor clamps when crowded hole is carried out to pipe (2) on the thick plate welding subassembly after welding in step S5, crowded hole anchor clamps include crowded hole bottom plate (53) and crowded stick (54), and the bottom of crowded stick (54) is 90 spheres, is provided with crowded stick passageway (55) and steel ball passageway (56) on crowded hole bottom plate (53), and the bottom of crowded hole bottom plate (53) is provided with profile groove (57), crowded stick (54) can insert in crowded stick passageway (55), profile groove (57) can be put into to the bottom of pipe (2), steel ball passageway (56) slope sets up, and the steel ball of being convenient for falls at the assigned position after extruding from pipe (2).
10. The method of claim 9, wherein the step of welding the plate to the plate includes the steps of: the step S5 of extruding the round pipe (2) on the welded thick plate welding assembly specifically comprises the following steps: the hole extrusion bottom plate (53) is fixed on a press base, the extrusion rod (54) is fixed on an upper fixing plate of a press machine, the extrusion rod (54) is located above an extrusion rod channel (55), the extrusion rod channel (55) is located above a to-be-extruded hole position of a circular tube (2), the lower portion of the circular tube (2) on a thick plate welding assembly is placed in an imitated groove (57) of the extrusion bottom plate (53), a steel ball starting press machine is placed at the to-be-extruded hole position of the circular tube (2), and the upper fixing plate moves downwards to drive the extrusion rod (54) to extrude the steel ball and complete hole extrusion at the to-be-extruded hole position on the circular tube (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010870678.0A CN111992997B (en) | 2020-08-26 | 2020-08-26 | Preparation method of thick plate welding assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010870678.0A CN111992997B (en) | 2020-08-26 | 2020-08-26 | Preparation method of thick plate welding assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111992997A true CN111992997A (en) | 2020-11-27 |
| CN111992997B CN111992997B (en) | 2021-08-10 |
Family
ID=73470916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010870678.0A Active CN111992997B (en) | 2020-08-26 | 2020-08-26 | Preparation method of thick plate welding assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111992997B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114001616A (en) * | 2021-11-16 | 2022-02-01 | 浙江汇丰汽车零部件股份有限公司 | Welding type push rod assembly position degree rapid detection device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4954670A (en) * | 1986-02-24 | 1990-09-04 | Raychem Corporation | Cable splice case |
| CN1489637A (en) * | 2000-12-21 | 2004-04-14 | �Ƹ��� | Aluminum alloy products and artificial aging method |
| US7121004B1 (en) * | 1997-11-24 | 2006-10-17 | Columbia Manufacturing Corp. | Method of fabricating security door |
| CN102172821A (en) * | 2011-03-21 | 2011-09-07 | 中国一冶集团有限公司 | Method for manufacturing adapting piece with round top and square bottom |
| CN103909373A (en) * | 2014-04-15 | 2014-07-09 | 安徽安凯汽车股份有限公司 | Positioning rectifying tool and method for engine mounting support |
| CN205664756U (en) * | 2016-06-05 | 2016-10-26 | 方明月 | Multifunctional checking tool |
| CN108406269A (en) * | 2018-04-18 | 2018-08-17 | 应日兴 | A kind of mobile phone button shares fixture |
-
2020
- 2020-08-26 CN CN202010870678.0A patent/CN111992997B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4954670A (en) * | 1986-02-24 | 1990-09-04 | Raychem Corporation | Cable splice case |
| US7121004B1 (en) * | 1997-11-24 | 2006-10-17 | Columbia Manufacturing Corp. | Method of fabricating security door |
| CN1489637A (en) * | 2000-12-21 | 2004-04-14 | �Ƹ��� | Aluminum alloy products and artificial aging method |
| CN102172821A (en) * | 2011-03-21 | 2011-09-07 | 中国一冶集团有限公司 | Method for manufacturing adapting piece with round top and square bottom |
| CN103909373A (en) * | 2014-04-15 | 2014-07-09 | 安徽安凯汽车股份有限公司 | Positioning rectifying tool and method for engine mounting support |
| CN205664756U (en) * | 2016-06-05 | 2016-10-26 | 方明月 | Multifunctional checking tool |
| CN108406269A (en) * | 2018-04-18 | 2018-08-17 | 应日兴 | A kind of mobile phone button shares fixture |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114001616A (en) * | 2021-11-16 | 2022-02-01 | 浙江汇丰汽车零部件股份有限公司 | Welding type push rod assembly position degree rapid detection device |
| CN114001616B (en) * | 2021-11-16 | 2023-09-15 | 浙江汇丰汽车零部件股份有限公司 | Welding type push rod assembly position degree rapid detection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111992997B (en) | 2021-08-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8127585B2 (en) | Process for manufacturing outer ring member for constant-velocity joint | |
| DE102005019160B4 (en) | Method for producing ball hubs for constant velocity joints | |
| US20220297179A1 (en) | Hollow drive shaft using upsetting method and manufacturing method therefor | |
| CN110802374B (en) | Manufacturing method of variable cross-section automobile driving axle housing | |
| CN111992997B (en) | Preparation method of thick plate welding assembly | |
| WO2023087849A1 (en) | Ball groove milling-free machining method for inner race of automobile universal joint | |
| WO2018108105A1 (en) | Rolled pipe thread processing method, rolling head, apparatus, module, production line, and product thereof | |
| US20190193138A1 (en) | Method for manufacturing universal joint using pipe | |
| US7090729B2 (en) | Outer ring member for constant velocity joint and method of manufacturing the member | |
| CN106662160B (en) | The outside joint member and its manufacturing method of constant-speed universal coupling | |
| US7677073B2 (en) | Method of manufacturing tooth profile part | |
| US4893972A (en) | Cutting tool | |
| EP3122490B1 (en) | Method and device for processing magnesium or magnesium alloy extruded profile segments | |
| CN108705023B (en) | Profiling forging process for integrated pipe joint section forge piece | |
| US8555693B2 (en) | Method for forming hollow profiles | |
| JP2006239735A (en) | Method for producing outer ring member for constant velocity joint, and punch | |
| US7347077B2 (en) | Method of manufacturing outer ring member for constant velocity joint | |
| DE3008738C2 (en) | Method and device for producing disc wheels made of sheet metal, in particular light metal sheet | |
| CN108296400B (en) | Gear flange ring rolling perforation nondestructive tempering device and machining method thereof | |
| DE102008011715B4 (en) | Method for producing a vehicle wheel | |
| CN111015136A (en) | Method and die for machining male shaft of intermediate shaft of automobile steering system | |
| CN111347004A (en) | Cold extrusion pressing forming process for automobile universal joint fork integral piece | |
| CN104493426A (en) | Production method of internal hexagonal bolt of track end coupler | |
| RU2759144C1 (en) | Method for manufacturing axisymmetric shells with internal riffles | |
| CN219358487U (en) | Welding tool for thin-wall pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A preparation method of thick plate welding components Effective date of registration: 20220629 Granted publication date: 20210810 Pledgee: Bank of China Limited Wuhan Qingshan sub branch Pledgor: WUHAN HUAXIA FINE-BLANKING TECHNOLOGY CO.,LTD. Registration number: Y2022420000207 |