CN210649122U - Auxiliary jig for welding frame seat tube - Google Patents
Auxiliary jig for welding frame seat tube Download PDFInfo
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- CN210649122U CN210649122U CN201921081984.5U CN201921081984U CN210649122U CN 210649122 U CN210649122 U CN 210649122U CN 201921081984 U CN201921081984 U CN 201921081984U CN 210649122 U CN210649122 U CN 210649122U
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- tube
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Abstract
The utility model discloses a frame seat pipe welding auxiliary tool, including quick detach clamping mechanism and welding bench, the frame that spot welding was accomplished can fix the location on the welding bench, and quick detach clamping mechanism can follow the inside expand lining of seat pipe and play frame seat inside pipe wall, or can wrap the outer wall of clamping frame seat pipe from the outside fast, the utility model discloses a quick detach clamping mechanism presss from both sides the seat pipe, need not customize seat pipe lining stick according to specification or car kind, and quick detach clamping device can get fast, can be suitable for the seat pipe of different specifications after the chuck quick replacement, can reduce mould cost input earlier stage; the same worker finishes picking, placing and welding in the welding process, the worker who drills the lining rod into the seat tube before welding and extracts the lining rod from the seat tube after heat treatment can be cancelled, the production efficiency is improved, the effective control can be realized above the investment of the die and manpower, the production investment cost is more reasonable, the deformation can be effectively reduced through the cross welding of the seat tube, the upper tube and the upper fork, and the roundness of the seat tube is kept.
Description
Technical Field
The utility model relates to a bicycle welding method, in particular to frame seat pipe welding auxiliary jig.
Background
In the bicycle frame production process, the problem of pipe bending deformation can be frequently encountered, a longer straight pipe is required for a bicycle frame seat pipe, and the requirement for higher straightness is met, so that the cushion rod can be easily inserted into the seat pipe, and the height of a cushion can be conveniently adjusted.
Generally, the upper fork and the upper pipe of the male bicycle are at the same height, the deformation of the seat pipe after welding is almost symmetrical front and back, although some small bending deformation exists, the seat pipe can be straightened in the heat treatment process of the bicycle frame to meet the use requirement; the upper fork and the upper tube of the bicycle for the woman are not at the same height, and after being welded with the seat tube in sequence, the seat tube can be bent to be S-shaped, so that the bending correction of the bicycle for the woman is very difficult under the influence of the structure and the space of the bicycle frame. The welding of the woman car needs to be controlled and prevented in the welding process.
The aluminum alloy pipe has relatively low hardness and high thermal expansion coefficient, so that the aluminum alloy pipe is easy to deform in the welding and heat treatment of thin-wall and thin-plate parts. The heat is too concentrated a bit in the welding process, the internal stress is produced in the pipe fitting, the instability is easy to occur in the next welding process, especially, the welding spots before and after the seat tube of the frame of the female bicycle are staggered a lot, the internal stress is involved twice, the S-shaped bend in the front and back directions of the seat tube is easily caused, the manual repair of the female bicycle is affected by the structural space of the frame, and the operation is difficult.
The existing method for overcoming the deformation of the female bicycle seat tube made of aluminum alloy is to insert a metal retainer with the hardness higher than that of the aluminum alloy into the female bicycle seat tube, the retaining piece needs to be matched with the size of an inner cavity of the pipe fitting to play a role of lining and fixing in the hole of the pipe fitting until the internal stress of the heat treatment frame is eliminated and then the retaining piece is pulled out from the seat tube, because each platform frame all uses above-mentioned holding member, the holding member occupies man-hour long in process of production, needs the metal holding member of batch input, still need professional equipment to carry out the plug-in and the extraction of holding member, the holding member needs high temperature resistant (carry out heat treatment with the aluminum alloy frame together), long-term use can not rust, dimensional stability needs to be good, the holding member generally needs the stainless steel material to select for use, can not share same specification, need input more mould cost and manpower, still seriously influence the efficiency of production.
SUMMERY OF THE UTILITY MODEL
In order to compensate above not enough, the utility model provides a supplementary tool of frame seat pipe welding, this supplementary tool of frame seat pipe welding has realized the seat pipe and has gone up the quick weld of intercrossing with the top tube, and welding deformation is few, and the welding cost is low.
The utility model discloses a solve the technical scheme that its technical problem adopted and be: the utility model provides a frame seat pipe welding auxiliary jig, includes quick detach clamping mechanism and welding bench, the frame that spot welding was accomplished can fix a position on the welding bench, and quick detach clamping mechanism can follow the inside bloated lining frame seat pipe inner wall that opens of seat pipe, or can wrap the tight frame seat pipe outer wall of clamp from the outside fast.
As a further improvement of the utility model, quick detach clamping mechanism includes fixed column, column spinner and rotary drive device, the column spinner can be around its axis relative pivoted install in fixed column axial one end, and the column spinner diameter is less than the seat pipe internal diameter, and rotary drive device drive column spinner low-speed rotatory, and the whole that fixed column and column spinner formed just can be inserted and locate in the seat pipe, and the fixed column keeps closely complex connected state with the seat pipe.
As a further improvement of the utility model, a turnover mechanism is arranged on the welding table and comprises a U-shaped support, a frame fixing plate, a swinging rotating shaft and a swinging driving device, the U-shaped support is fixedly arranged on the welding table, a group of coaxial swinging rotating shafts are respectively axially stopped and are arranged on the two side walls of the U-shaped support in a rotatable way in the circumferential direction, the swinging driving device can drive the swinging rotating shafts to rotate for setting angles, the two ends of the frame fixing plate are respectively and fixedly connected with a group of swinging rotating shafts, a hollow part which is right opposite to the welding part of the seat tube is arranged on the frame fixing plate, a five-way positioning pin, an upper tube clamping block, an upper fork clamping block and a head tube, the five-way positioning pin can be inserted into a five-way hole of the frame, a channel which is only used for accommodating the upper tube and the upper fork is formed on the upper tube clamping block and the upper fork clamping block respectively, and the head tube positioning mechanism can be inserted into the head tube of the frame.
As a further improvement, the quick-release clamping mechanism can be positioned on the frame fixing plate in an axial sliding manner, and is further provided with a quick-release driving device which drives the quick-release clamping mechanism to slide.
As a further improvement, the quick-release driving device is a manual quick-clamp mechanism, a cylinder or a motor and a screw-nut mechanism.
As a further improvement, tilting mechanism still includes sliding block and quick clamp mechanism, the sliding block can be followed the gliding installation of perpendicular saddle pipe axial direction on the frame fixed plate, be equipped with parallel interval arrangement's first fender wall and second fender wall on the sliding block, the car head pipe on the frame just can hold between first fender wall and second fender wall, and be equipped with respectively on first fender wall and the second fender wall and just right fretwork perforation with car head pipe both ends, car head pipe positioning mechanism just can insert the car head intraductally through the fretwork perforation on first fender wall and the second fender wall, two quick clamp mechanisms are fixed mounting respectively on first fender wall and second fender wall, be equipped with a ejector pin respectively on two quick clamp mechanisms, two ejector pins can push up tight car head pipe axial both ends respectively.
As a further improvement, the upper tube clamping block and the upper fork clamping block are respectively two sets of and respectively correspond to the upper tube and the upper fork at two ends.
As a further improvement, the lower end of the welding table is also provided with universal wheels.
The utility model has the beneficial technical effects that: the quick-release clamping mechanism clamps the seat pipe, the seat pipe lining rod does not need to be customized according to specifications or vehicle types, the quick-release clamping device can be quickly taken and placed, the quick-release clamping mechanism can be suitable for seat pipes with different specifications after the clamp head is quickly replaced, and the cost investment of the mold in the early stage can be reduced; the same worker finishes picking, placing and welding in the welding process, so that the worker who drills the lining rod into the seat tube before welding and extracts the lining rod from the seat tube after heat treatment can be omitted, the production efficiency is improved, the effective control can be realized above the mold and the manpower input, the production input cost is more reasonable, the deformation can be effectively reduced through the cross welding of the seat tube, the upper tube and the upper fork, and the roundness of the seat tube is kept.
Drawings
FIG. 1 is a front view of a bicycle tube fitting structure;
FIG. 2 is a front view of the tube assembly of the bicycle;
FIG. 3 is a schematic view of a welding deformation of a bicycle tube for a female bicycle;
FIG. 4 is a cross-sectional view of the seat tube, the upper tube and the upper fork of the present invention;
FIG. 5 is a front view of the structure principle of the turnover mechanism of the present invention;
FIG. 6 is a left side view of the structure principle of the turnover mechanism of the present invention;
FIG. 7 is a front view of the structure principle of the quick release clamping mechanism of the present invention;
fig. 8 is a diagram illustrating a usage status of the quick release clamping mechanism of the present invention.
Detailed Description
Example (b): the utility model provides a frame seat pipe welding auxiliary fixture which characterized in that: including quick detach clamping mechanism 17 and welding bench, the frame that spot welding was accomplished can be fixed and be located the welding bench, and quick detach clamping mechanism 17 can be followed the inside bloated lining of seat pipe and lifted frame seat pipe inner wall, or can wrap the outer wall of clamp frame seat pipe fast from the outside.
The quick-release clamping mechanism 17 comprises a fixed column 23, a rotating column 24 and a rotary driving device, wherein the rotating column 24 can be mounted at one axial end of the fixed column 23 in a manner of relative rotation around the axis of the rotating column 24, the diameter of the rotating column 24 is smaller than the inner diameter of the seat tube, the rotary driving device drives the rotating column 24 to rotate at a low speed, the whole formed by the fixed column 23 and the rotating column 24 can be inserted into the seat tube, and the fixed column 23 and the seat tube are kept in a tightly-matched connection state. The rotating column 24 plays a guiding role when the quick-release clamping mechanism 17 is installed, and after installation, the fixing column 23 plays a role in expanding the inner wall of the seat tube 1, so that the rotating column 24 rotates at a low speed, and deformation of the seat tube 1 during welding is avoided.
A turnover mechanism is arranged on the welding table and comprises a U-shaped support 11, a frame fixing plate 12, a swinging rotating shaft 13 and a swinging driving device, the U-shaped support 11 is fixedly arranged on the welding table, a group of coaxial swinging rotating shafts 13 are respectively axially stopped and are arranged on two side walls of the U-shaped support 11 in a rotatable manner along the circumferential direction, the swinging driving device can drive the swinging rotating shafts 13 to rotate for setting angles, two ends of the frame fixing plate 12 are respectively and fixedly connected with the group of swinging rotating shafts 13, a hollow part which is just opposite to a seat tube welding part is arranged on the frame fixing plate 12, a five-way positioning pin 14, an upper tube clamping block 15, an upper fork clamping block 16 and a head tube positioning mechanism 9 are arranged on the frame fixing plate 12, the five-way positioning pin 14 can be inserted into the five-way hole of the frame, and channels which are only used for accommodating an upper tube and the, the head pipe positioning mechanism 9 can be inserted in the head pipe of the frame. Through five-way locating pin 14 on frame fixed plate 12, the tight piece 15 of top tube clamp, go up fork clamp tight piece 16 and headstock pipe positioning mechanism 9 combined action realization fixed position to the frame, and then realize the welding to seat pipe and top tube and last fork, one side welding is accomplished the back, swing pivot 13 rotates 180 degrees, can realize the frame turn-over, weld seat pipe and top tube and last fork another side, this structure frame is stabilized positioning in welding process, the welding precision is high, one side welding is accomplished the back, the frame that can overturn fast carries out the another side welding, avoided carrying out the turn-over relocation to the frame, the welding efficiency is high, the welding precision is high.
The quick-release clamping mechanism 17 can be axially slidably positioned on the frame fixing plate 12, and is further provided with a quick-release driving device which drives the quick-release clamping mechanism 17 to slide. The quick-release clamping mechanism 17 is mounted on the frame fixing plate 12, and can clamp the frame seat tube and has a positioning effect on the frame.
The quick-release driving device is a manual quick-clamp mechanism, a cylinder or a motor and screw rod nut mechanism.
The turnover mechanism further comprises a sliding block 19 and fast clamping mechanisms 20, the sliding block 19 can be installed on the frame fixing plate 12 in a manner of sliding along the axial direction of the seat tube, the sliding block 19 is provided with a first retaining wall 21 and a second retaining wall 22 which are arranged in parallel at intervals, the head tube on the frame can be just accommodated between the first retaining wall 21 and the second retaining wall 22, the first retaining wall 21 and the second retaining wall 22 are respectively provided with a hollowed-out through hole which is opposite to the two ends of the head tube, the head tube positioning mechanism 9 can just be inserted into the head tube through the hollowed-out through holes on the first retaining wall 21 and the second retaining wall 22, the two fast clamping mechanisms 20 are respectively and fixedly installed on the first retaining wall 21 and the second retaining wall 22, the two fast clamping mechanisms 20 are respectively provided with a push rod, and the two push rods can respectively push against the two axial ends of the head tube.
The upper tube clamping blocks 15 and the upper fork clamping blocks 16 are respectively two groups and respectively correspond to the two ends of the upper tube and the two ends of the upper fork.
The welding bench lower extreme still is equipped with the universal wheel, makes things convenient for removal welding bench to arbitrary position, improves the welding convenience.
A frame seat tube welding method comprises the following specific steps:
the method comprises the following steps: respectively assembling a seat tube 1, an upper tube 2 and an upper fork 3 of the bicycle frame by taking the state of the bicycle frame as a reference during riding;
step two: fixing and clamping the seat tube 1 by adopting a quick-release clamping mechanism 17;
step three: dividing welding beads of the seat pipe 1, the upper pipe 2 and the upper fork 3 into a left welding bead 4 extending integrally along a longitudinal surface, a right welding bead 5 extending integrally along the longitudinal surface, an upper welding bead 6 extending integrally along a horizontal direction and a lower welding bead 7 extending integrally along the horizontal direction, wherein the left welding bead 4 and the right welding bead 5 are symmetrically arranged along a longitudinal central plane of the seat pipe 1, and the left welding bead 4 and the right welding bead 5 are symmetrically arranged with the upper welding bead 6 and the lower welding bead 7 and have the length twice as long as the upper welding bead 6 and the lower welding bead 7;
step four: crosswise welding a seat pipe 1 with a left welding bead 4 and a right welding bead 5 of an upper pipe 2 and an upper fork 3;
step five: crosswise welding the seat tube 1 with the upper tube 2 and the upper fork 3 through an upper welding bead 6 and a lower welding bead 7;
step six: the quick-release clamping mechanism 17 is disassembled;
step seven: and carrying out heat treatment on the frame.
The seat tube 1 is clamped and positioned through the quick-release clamping mechanism 17 before welding, the quick-release clamping mechanism 17 can be suitable for different specifications of the seat tube 1, the clamping device is only used in a short welding time, production becomes smooth, the investment of mold cost is reduced, welding beads on the circumference of the tube are segmented and are welded in a staggered mode, the phenomenon that heat is excessively concentrated is avoided, the welding deformation is greatly reduced, and the roundness of the bicycle seat tube 1 is kept.
In the fourth step, the left weld bead 4 of the seat tube 1 and the upper tube 2, the left weld bead 4 of the seat tube 1 and the upper fork 3, the right weld bead 5 of the seat tube 1 and the upper tube 2, and the right weld bead 5 of the seat tube 1 and the upper fork 3 are welded in sequence, and in the fifth step, the upper weld bead 6 of the seat tube 1 and the upper tube 2, the upper weld bead 6 of the seat tube 1 and the upper fork 3, the lower weld bead 7 of the seat tube 1 and the upper tube 2, and the lower weld bead 7 of the seat tube 1 and the upper fork 3 are welded in sequence. The welding sequence is fully crossed, and other cross sequencing modes can be adopted.
In the first step, the seat tube 1 and the upper tube 2 of the frame are assembled, then at least one spot welding 8 is carried out on the seat tube 1 and the upper tube 2, then the seat tube 1 and the upper fork 3 of the frame are assembled, and then at least one spot welding 8 is carried out on the seat tube 1 and the upper fork 3. Spot welding 8 is fixed earlier, then carries out the welding bead welding, and rigidity between the pipe fitting when guaranteeing the welding bead welding can not take place the dislocation, guarantees welding accuracy, more can further reduce the pipe fitting and warp.
The seat tube 1, the upper tube 2 and the upper fork 3 are respectively assembled on a fixed table, and four spot welding 8 are firstly carried out and are respectively positioned on the intersection points of the left weld bead 4 and the upper weld bead 6 and the lower weld bead 7, and the intersection points of the right weld bead 5 and the upper weld bead 6 and the lower weld bead 7. Through spot welding 8 of a plurality of points, it is stable to guarantee that seat pipe 1 and top tube 2 and last fork 3 are the assemblage position, is favorable to marking different section welding bead positions simultaneously, guarantees that follow-up cross welding's position symmetry is good, reduces welding deformation.
After spot welding 8 of the seat tube 1, the upper tube 2 and the upper fork 3 of the frame is completed, the integral mechanism is fixedly arranged on a welding table 10. Through fixed mounting on welding bench 10, realize the fixed positioning to the whole mechanism of frame, be convenient for weld the welding bead, can set up the location that constant head tank, clamping mechanism etc. realized the frame on welding bench 10.
Set up tilting mechanism on welding bench 10, seat pipe 1 is fixed on tilting mechanism with top tube 2 and 3 spot welding 8 integrated mechanisms after accomplishing of last fork, and seat pipe 1 is accomplished with the welding of 4 welding of the left side welding beads of top tube 2 and last fork 3 after, tilting mechanism drives frame upset 180 degrees backs, carries out seat pipe 1 and top tube 2 and the 5 welding of the right side welding beads of last fork 3. Set up tilting mechanism on welding bench 10, when realizing the fixed position to the frame, after frame one side welding is accomplished, can overturn 180 degrees automatically, realize the welding of opposite side, the welding workman need not go to weld around the another side, and weldment work efficiency improves greatly.
And step four and step five, cooling the welding seam in an air cooling mode in the welding process, and after welding is finished, performing contact type heat conduction cooling on the welding part through a workpiece with good heat conductivity. Air cooling is added in the welding process, and after welding, the welded part is quickly conducted with heat through a workpiece with good heat conductivity, so that the phenomenon that heat is too concentrated to one point is avoided, and the welding deformation is effectively reduced.
Claims (7)
1. The utility model provides a frame seat pipe welding auxiliary fixture which characterized in that: including quick detach clamping mechanism (17) and welding bench, the frame that spot welding was accomplished can be fixed and be located the welding bench, and quick detach clamping mechanism can follow the inside bloated lining of seat pipe and play frame seat inside pipe wall, or can wrap the tight frame seat outside of tubes wall of clamp frame fast from the outside, and quick detach clamping mechanism includes fixed column (23), column spinner (24) and rotary driving device, the column spinner can be installed in fixed column axial one end around its axis relative pivoted, and the column spinner diameter is less than seat pipe internal diameter, and rotary driving device drive column spinner low-speed rotation, and the whole that fixed column and column spinner formed just can be inserted and locate in the seat pipe, and fixed column and seat pipe keep closely complex connected state.
2. The welding auxiliary tool according to claim 1, wherein: the welding table is provided with a turnover mechanism, the turnover mechanism comprises a U-shaped support (11), a frame fixing plate (12), a swinging rotating shaft (13) and a swinging driving device, the U-shaped support is fixedly arranged on the welding table, a group of coaxial swinging rotating shafts are respectively axially stopped and are arranged on two side walls of the U-shaped support in a rotating way in the circumferential direction, the swinging driving device can drive the swinging rotating shafts to rotate for setting angles, two ends of the frame fixing plate are respectively and fixedly connected with the group of swinging rotating shafts, the frame fixing plate is provided with a hollow part just opposite to the welding part of the seat tube, the frame fixing plate is provided with a five-way positioning pin (14), an upper tube clamping block (15), an upper fork clamping block (16) and a head tube positioning mechanism (9), the five-way positioning pin can be inserted into the five-way hole of the frame, and passages only used for accommodating the, the head tube positioning mechanism can be inserted in the head tube of the frame.
3. The welding auxiliary tool according to claim 2, wherein: the quick-release clamping mechanism can be positioned on the frame fixing plate in an axial sliding manner, and a quick-release driving device is further arranged and drives the quick-release clamping mechanism to slide.
4. The welding auxiliary tool according to claim 3, wherein: the quick-release driving device is a manual quick-clamp mechanism, a cylinder or a motor and screw rod nut mechanism.
5. The welding auxiliary tool according to claim 2, wherein: tilting mechanism still includes sliding block (19) and quick clamp mechanism (20), the sliding block can be followed the gliding installation of perpendicular saddle pipe axial direction on the frame fixed plate, be equipped with parallel interval arrangement's first fender wall (21) and second fender wall (22) on the sliding block, the car head pipe on the frame just can hold between first fender wall and the second fender wall, and be equipped with respectively on first fender wall and the second fender wall with the just right fretwork perforation in car head pipe both ends, car head pipe positioning mechanism just can insert in the car head pipe through the fretwork perforation on first fender wall and the second fender wall, two quick clamp mechanisms are fixed mounting respectively on first fender wall and second fender wall, be equipped with a ejector pin respectively on two quick clamp mechanisms, two ejector pins can push up tight car head pipe axial both ends respectively.
6. The welding auxiliary tool according to claim 2, wherein: the upper tube clamping blocks and the upper fork clamping blocks are respectively two groups and respectively correspond to the two ends of the upper tube and the two ends of the upper fork.
7. The welding auxiliary tool according to claim 1, wherein: the lower end of the welding table is also provided with universal wheels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921081984.5U CN210649122U (en) | 2019-07-11 | 2019-07-11 | Auxiliary jig for welding frame seat tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921081984.5U CN210649122U (en) | 2019-07-11 | 2019-07-11 | Auxiliary jig for welding frame seat tube |
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| Publication Number | Publication Date |
|---|---|
| CN210649122U true CN210649122U (en) | 2020-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921081984.5U Active CN210649122U (en) | 2019-07-11 | 2019-07-11 | Auxiliary jig for welding frame seat tube |
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| CN (1) | CN210649122U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110315232A (en) * | 2019-07-11 | 2019-10-11 | 捷安特(中国)有限公司 | Vehicle-frame seat-tube welding method and its welding auxiliary fixture |
| CN114227048A (en) * | 2021-12-30 | 2022-03-25 | 江苏旺达喷灌机有限公司 | Welding method of water spray truss welding die using reel sprinkler |
-
2019
- 2019-07-11 CN CN201921081984.5U patent/CN210649122U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110315232A (en) * | 2019-07-11 | 2019-10-11 | 捷安特(中国)有限公司 | Vehicle-frame seat-tube welding method and its welding auxiliary fixture |
| CN114227048A (en) * | 2021-12-30 | 2022-03-25 | 江苏旺达喷灌机有限公司 | Welding method of water spray truss welding die using reel sprinkler |
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