CN223045194U - Ultrasonic welding fixing tool for steering column - Google Patents

Abstract

The utility model discloses a fixing tool for ultrasonic welding of a steering column, comprising a profiling block, on which a profiling groove matching the outline of a steering column bracket is arranged, a limit block for limiting the outward movement of the steering column bracket is arranged on one side, and a photoelectric detection member for detecting the presence or absence of the steering column bracket; a clamping mechanism, which comprises two clamping modules symmetrically arranged on both sides of the profiling block, and the two clamping modules are used to press or release the fabric on the steering column bracket. The utility model realizes the precise positioning of the workpiece in the steering column welding process, significantly improves the consistency of the workpiece positioning, ensures the stability and consistency of the welding quality, and improves the overall quality of the product.

Description

Ultrasonic welding fixing tool for steering column

Technical Field

The utility model relates to the technical field of automobile interior trim part machining, in particular to an ultrasonic welding fixing tool for a steering column.

Background

Steering columns are an important component in automobiles that connects the steering wheel and the steering gear. In modern motor vehicle construction, steering columns are generally composed of a carrier and a textile fabric, which are connected by means of ultrasonic puncture welding. However, in the welding process, the textile fabric is soft, is not easy to position, and is easy to deviate in the welding process, so that the welding position is inaccurate, and the product quality is affected.

At present, the conventional manual welding method has the following problems:

The positioning is difficult, the fabric cloth is soft and difficult to fix, and the position adjustment before welding is time-consuming and has low efficiency.

And (3) the welding offset is that even after the positioning, the fabric cloth is easy to deviate in the welding process, so that the welding position is inaccurate.

The quality problem is that due to the reasons, the products are easy to produce batch defective products, the rejection rate is high, and the production cost is increased.

Therefore, there is a need for an ultrasonic welding fixture for steering columns.

Disclosure of utility model

Aiming at the defects existing in the prior art, the utility model provides an ultrasonic welding and fixing tool for a steering column.

The utility model discloses an ultrasonic welding fixture for a steering column, which comprises:

The profiling block is provided with a profiling groove matched with the profile of the steering column support, one side of the profiling block is provided with a limiting block for limiting the steering column support to move outwards and a photoelectric detection piece for detecting whether the steering column support exists or not;

The clamping mechanism comprises two clamping modules which are symmetrically arranged on two sides of the profiling block, and the two clamping modules are used for compressing or releasing fabric cloth on the steering column bracket.

As a further improvement of the utility model, the utility model further comprises a base plate, wherein the profiling block and the clamping mechanism are arranged on the base plate.

The utility model further improves the structure that the bottom of the profiling block is arranged on the base plate through a plurality of brackets, a plurality of limiting blocks are arranged at the front edge of the profiling block corresponding to the profiling groove, and the limiting blocks can move along the direction towards or away from the profiling groove so that the steering column bracket is attached to the profiling block.

As a further improvement of the utility model, the bottom of the profiling block is provided with a mounting part corresponding to each limiting block in an outward horizontal extension mode, and the bottoms of a plurality of limiting blocks are mounted on the corresponding mounting parts;

The mounting part is provided with a plurality of circular through holes, the limiting block is provided with a plurality of adjusting holes corresponding to the plurality of circular through holes, the plurality of adjusting holes penetrate through the limiting block in the vertical direction, the adjusting holes are long holes extending in the front-back direction of the imitation groove, and the adjusting screw rod sequentially penetrates through the long holes and the circular through holes from top to bottom.

As a further improvement of the utility model, the photoelectric detection piece is a photoelectric sensor which is arranged at the position of the profiling block corresponding to the front edge of the profiling groove.

As a further improvement of the utility model, the clamping module comprises a mounting bottom plate, a mounting bracket, a connecting plate, an air cylinder, a gear, a rack and clamping jaws;

The mounting base plate is fixedly mounted on the base plate, the mounting bracket is mounted on one side, close to the profiling block, of the top of the mounting base plate in the vertical direction, the air cylinder is mounted on one side, far away from the profiling block, of the mounting base plate in the vertical direction, the connecting plate is mounted between the mounting bracket and the air cylinder in the vertical direction, and the connecting plate can ascend or descend in the vertical direction through the air cylinder;

The rack is arranged on one side, close to the mounting support, of the connecting plate in the front-back direction along the vertical direction, the linear guide rail is arranged on one side, close to the connecting plate, of the mounting support in the vertical direction, a linear bearing is slidably arranged on the linear guide rail, a sliding groove matched with the sliding direction of the linear bearing is formed in one side, close to the mounting support, of the connecting plate, the gear meshed with the rack is arranged on the top of the mounting support, the clamping jaw is connected with the gear through the transmission shaft, and the clamping jaw can be folded upwards along with rotation of the transmission shaft to be opened or pressed downwards to be abutted to fabric cloth on the steering column support.

As a further improvement of the utility model, the clamping jaw comprises a rotating part, a connecting part and a pressing part, wherein the rotating part, the connecting part and the pressing part are sequentially and detachably connected to form a Z-shaped structure, and one end of the rotating part, which is far away from the connecting part, is connected with the gear through the transmission shaft;

When the rotating part swings downwards to a proper position, the pressing part presses against the fabric cloth on the steering column bracket, and when the rotating part swings upwards, the pressing part loosens the fabric cloth.

As a further improvement of the utility model, a spring mounting column is arranged on the front side of the rotating part and the front side of the mounting bracket, and a spring is sleeved between the two spring mounting columns.

As a further improvement of the utility model, the clamping mechanism also comprises a three-position five-way middle-leakage electromagnetic valve and a plurality of adjustable one-way valves;

The three-position five-way middle leakage type electromagnetic valve comprises an air source interface, an air outlet A, an air outlet B, a working interface A and a working interface B, wherein the working interface A is connected with air inlets of cylinders of two clamping modules through air pipes respectively, the working interface B is connected with air return inlets of cylinders of the two clamping modules through air pipes respectively, and each air pipe is provided with an adjustable one-way valve.

As a further improvement of the present utility model, each of the cylinders is provided with a cylinder position detection module;

Each cylinder position detection module comprises an in-place detection piece and a return detection piece.

Compared with the prior art, the utility model has the beneficial effects that:

According to the utility model, by arranging the profiling block and the profiling groove matched with the outline of the steering column support and matching with the clamping mechanism, the workpiece is accurately positioned in the steering column welding process, the consistency of workpiece positioning is obviously improved, the stability and consistency of welding quality are ensured, and the overall quality of products is improved.

The utility model can adopt the modes of manual pre-pressing and then compressing and positioning the equipment, thereby effectively improving the stability of assembly, the manual pre-pressing can preliminarily fix the position of the workpiece, and the equipment compressing and positioning can further ensure the stability and the accuracy of the workpiece in the welding process, so that the welding defect caused by the movement of the workpiece is reduced.

The utility model obviously reduces the quality problem of products caused by inaccurate positioning, thereby improving the qualification rate of the products. The product quality is improved, customer complaints are reduced, customer satisfaction is enhanced, and further market competitiveness of enterprises is improved, and meanwhile, the labor intensity of staff is effectively reduced by adopting automatic equipment to compress and position workpieces. The staff only needs to carry out preliminary pre-compaction operation, and subsequent compaction positioning work is automatically completed by equipment, so that the working efficiency is improved, the fatigue and work injury risks caused by repeated labor of the staff are reduced, and the working environment of the staff is improved.

Drawings

Fig. 1 is a schematic structural diagram of an ultrasonic welding fixture for a steering column according to an embodiment of the present utility model;

FIG. 2 is a schematic view of another angle of a steering column ultrasonic welding fixture according to an embodiment of the present utility model;

FIG. 3 is a front view of a steering column ultrasonic welding fixture according to an embodiment of the present utility model;

FIG. 4 is a top view of a steering column ultrasonic welding fixture according to one embodiment of the present utility model;

FIG. 5 is a schematic view of a profiling block installation for a steering column ultrasonic welding fixture in accordance with an embodiment of the present utility model;

FIG. 6 is a schematic view of a mounting of a clamping mechanism for a steering column ultrasonic weld fixture in accordance with one embodiment of the present utility model;

FIG. 7 is a schematic view of a clamping mechanism for a steering column ultrasonic welding fixture according to an embodiment of the present utility model;

FIG. 8 is a schematic view of a clamping mechanism for another angle of a steering column ultrasonic welding fixture according to an embodiment of the present utility model;

FIG. 9 is a schematic view of a clamping mechanism for another angle of a steering column ultrasonic welding fixture according to an embodiment of the present utility model;

FIG. 10 is a schematic diagram illustrating the installation of a gear of a clamping mechanism for a steering column ultrasonic welding fixture in accordance with one embodiment of the present utility model;

FIG. 11 is a schematic diagram of the cooperation of a gear and a transmission shaft of a clamping mechanism for a steering column ultrasonic welding fixture according to an embodiment of the present utility model;

Fig. 12 is a schematic diagram of gas circuit connection for a steering column ultrasonic welding fixture according to an embodiment of the present utility model.

In the figure:

1. The device comprises a profiling block, 1-1 part, a profiling block main body, 1-11 parts, 1-2 parts, profiling grooves, 1-3 parts, limiting blocks, 1-4 parts, a bracket, 2 parts, a clamping mechanism, 2-1 parts, a mounting bottom plate, 2-2 parts, a mounting bracket, 2-21 parts, a U-shaped groove, 2-3 parts, a connecting plate, 2-31 parts, a U-shaped clamping part, 2-32 parts, a sliding groove, 2-4 parts, an air cylinder, 2-41 parts, a return detection part, 2-42 parts, an in-place detection part, 2-5 parts, a transmission shaft, 2-6 parts, clamping claws, 2-61 parts, a rotating part, 2-62 parts, a connecting part, 2-63 parts, a pressing part, 2-7 parts and a rack, 2-8 parts, a linear guide rail, 2-9 parts, a linear bearing, 2-10 parts, a gear, 3 parts, a substrate, 4 parts, a photoelectric sensor, 5 parts, a spring mounting column, a spring, 7 parts, a three-position five-way release type electromagnetic valve and an 8 parts, an adjustable one-way valve.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediary, or in communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The utility model is described in further detail below with reference to the attached drawing figures:

As shown in figures 1-4, the ultrasonic welding fixture for the steering column comprises a profiling block 1 and a clamping mechanism 2, wherein the profiling block 1 is provided with a profiling groove 1-2 which is matched with the outline of a steering column support, one side of the profiling block is provided with a limiting block 1-3 which is used for limiting outward movement of the steering column support, and a photoelectric detection piece which is used for detecting whether the steering column support exists, the clamping mechanism 2 comprises two clamping modules which are symmetrically arranged on two sides of the profiling block 1, and the two clamping modules are used for compressing or releasing fabric cloth on the steering column support.

In the embodiment, the profiling block 1 and the profiling groove 1-2 matched with the outline of the steering column support are arranged, and the clamping mechanism 2 is matched, so that the workpiece is accurately positioned in the steering column welding process, the consistency of workpiece positioning is remarkably improved, the stability and consistency of welding quality are ensured, the whole quality of a product is improved, the assembly stability is effectively improved by adopting a mode of pre-manually pre-pressing and then carrying out equipment compacting and positioning, the workpiece position can be initially fixed by manual pre-pressing, the stability and accuracy of the workpiece in the welding process can be further ensured by equipment compacting and positioning, the welding defect caused by workpiece movement is reduced, the product quality problem caused by inaccurate positioning is remarkably reduced, the qualification rate of the product is improved, the customer satisfaction is improved, the market competitiveness of enterprises is further improved, the labor intensity of staff is effectively reduced by adopting automatic equipment to carry out the compacting and positioning of the workpiece, the fatigue and the work injury caused by repeated labor of the staff is reduced, and the working environment of the staff is improved.

Specific:

As shown in fig. 1 to 4, in the above embodiment, the present invention preferably further includes a base plate 3, where the base plate 3 is used to carry the profiling block 1 and the clamping mechanism 2, so that the profiling block 1 and the clamping mechanism 2 are mounted on the same horizontal plane.

In the above embodiment, as shown in fig. 5, preferably, the profiling block 1 comprises a profiling block main body 1-1 with a rectangular structure, the top of the profiling block main body 1-1 is concave to form a profiling groove 1-2 with a through front and back and a U-shaped shape, the profiling groove 1-2 profiles a steering column bracket and can quickly position the steering column bracket, the front edge of the profiling block main body 1-1 corresponding to the profiling groove 1-2 is provided with a plurality of limiting blocks 1-3, the limiting blocks 1-3 are arranged at intervals along the length direction of the profiling block main body 1-1, and the limiting blocks 1-3 can move along the direction towards or away from the profiling groove 1-2 to enable the steering column bracket to be attached on the profiling block main body 1-1. The number of the limiting blocks 1-3 in the embodiment is preferably 2.

In the above embodiment, preferably, the bottom of the profiling block 1 is provided with a plurality of brackets 1-4 at intervals along the length direction thereof, the plurality of brackets 1-4 are all arranged along the vertical direction and the bottoms thereof are all fixedly mounted on the base plate 3, the bottom plate of the profiling block 1 extends outwards for a certain distance along the horizontal direction corresponding to each limiting block 1-3 to form a mounting part 1-11, and the mounting part 1-11 is used for mounting the limiting blocks 1-3. In order to realize that the plurality of limiting blocks 1-3 can move along the direction facing or far away from the imitation groove 1-2, the mounting part 1-11 in the embodiment is provided with a plurality of circular through holes, the limiting blocks 1-3 are provided with a plurality of adjusting holes corresponding to the plurality of circular through holes, the plurality of adjusting holes penetrate through the limiting blocks along the vertical direction, the adjusting holes are long holes extending along the front and back directions of the imitation groove 1-2, the adjusting screw rod sequentially penetrates through the long holes and the circular through holes from top to bottom, and when the limiting blocks 1-3 are required to be adjusted, the limiting blocks 1-3 can be matched with the adjusting screw rod through the long holes of the adjusting screw rod only by unscrewing the adjusting screw rod, and move along the direction facing or far away from the imitation groove 1-2 so as to ensure that the steering column bracket is better attached to the imitation block 1.

In the above embodiment, preferably, the photoelectric detection element is a photoelectric sensor 4, and the photoelectric sensor 4 is installed at the front edge position of the profiling block 1 corresponding to the profiling groove 1-2, in this embodiment, the photoelectric sensor 4 is installed in the middle of the two limiting blocks 1-3, and the arrangement of the photoelectric sensor 4 is mainly used for detecting whether the steering column bracket is placed in the profiling groove 1-2 or not, so as to prevent the missing element.

In the above embodiment, the profiling block 1 is preferably made of copper material, so that heat dissipation after ultrasonic welding can be facilitated, welding spots are better formed, and the substrate 3 and the brackets 1-4 are made of aluminum material, so that the profiling block has the advantages of light weight, high strength and easiness in processing.

As shown in fig. 6-11, in the above embodiment, preferably, the clamping module includes a mounting base plate 2-1, a mounting bracket 2-2, a connecting plate 2-3, a cylinder 2-4, a transmission shaft 2-5, a clamping jaw 2-6, a rack 2-7, a linear guide rail 2-8, a linear bearing 2-9 and a gear 2-10, wherein the mounting base plate 2-1 is detachably mounted on a base plate 3 through bolts, the mounting bracket 2-2 is mounted on one side of the top of the mounting base plate 2-1 near the profiling block 1 in the vertical direction, the cylinder 2-4 is mounted on one side of the top of the mounting base plate 2-1 far from the profiling block 1 in the vertical direction, and the extending direction of the cylinder 2-4 extends vertically upwards. The connecting plate 2-3 is arranged between the mounting bracket 2-2 and the air cylinder 2-4 along the vertical direction, the middle part of one side, close to the air cylinder 2-4, of the connecting plate 2-3 horizontally protrudes outwards to form a U-shaped clamping part 2-31, annular protrusions are respectively arranged at the tail end of a piston rod of the air cylinder 2-4, corresponding to the upper part and the lower part of the U-shaped clamping part 2-31, the connecting plate 2-3 is clamped between the upper part and the lower annular protrusions through the U-shaped clamping part 2-31, when the piston rod of the air cylinder 2-4 stretches and contracts, the connecting plate 2-3 can be driven to move up and down along the vertical direction, a rack 2-7 and a chute 2-32 are arranged at one side, close to the mounting bracket 2-2, of the rack 2-7 and the chute 2-32 are arranged on the connecting plate 2-3 in the front-back direction.

In the above embodiment, preferably, the mounting bracket 2-2 is provided with a linear guide rail 2-8 matched with the sliding groove 2-32 on one side close to the connecting plate 2-3 along the vertical direction, the linear guide rail 2-8 is provided with a linear bearing 2-9 in a sliding manner, the width of the linear bearing 2-9 is matched with the width of the sliding groove 2-32, so that the linear bearing 2-9 can slide up and down along the sliding groove 2-32 and the paving direction of the linear guide rail 2-8, one side of the top of the mounting bracket 2-2 is recessed inwards along the vertical direction to form a U-shaped groove 2-21, one side of the U-shaped groove 2-21 close to the rack 2-7 is provided with a gear seat, a gear 2-10 is arranged in the gear seat, a transmission shaft 2-5 is traversed in the U-shaped groove 2-21, the transmission shaft 2-5 penetrates through the U-shaped groove 2-21 and then is connected with the gear 2-10, the gear 2-10 is simultaneously meshed with the rack 2-7, one end of the clamping jaw 2-6 is arranged in the U-shaped groove 2-21 and is rotatably connected with the transmission shaft 2-5, so that the clamping jaw 2-6 rotates down along with the U-shaped groove 2-21, and the clamping jaw rotates down along with the U-shaped groove 2-21 to press down on the bracket or swings down to press the fabric upwards, and the fabric is turned down on the fabric is turned down.

In the above embodiment, preferably, the clamping jaw 2-6 comprises a rotating part 2-61, a connecting part 2-62 and a pressing part 2-63, wherein the rotating part 2-61, the connecting part 2-62 and the pressing part 2-63 are sequentially and detachably connected to form a Z-shaped structure, one end of the rotating part 2-61, which is far away from the connecting part 2-62, is arranged in the U-shaped groove 2-21 and is connected with the gear 2-10 through the transmission shaft 2-5, the rotating part 2-61 can swing up and down in the U-shaped groove 2-21 along with the rotation of the transmission shaft 2-5, the pressing part 2-63 presses against fabric cloth on the steering column bracket after the rotating part 2-61 swings down in place, and the pressing part 2-63 releases the fabric cloth when the rotating part 2-61 swings up. In this embodiment, the pressing portions 2 to 63 are horizontally placed in an L-shape so as to better perform fixing work on the fabric cloth on the steering column bracket.

In the above embodiment, preferably, when the clamping jaw 2-6 is pressed down to the proper position, the connecting portion 2-62 of the clamping jaw 2-6 is attached to the side wall of the U-shaped imitation groove 1-2.

In the above embodiment, preferably, in actual production, when there is no pre-pressing action on the workpiece, the clamping jaw 2-6 is directly driven to compress by the cylinder 2-4, and because the clamping jaw 2-6 is relatively large in action and relatively fast, fabric cloth is easily offset in the clamping process, and poor welding accidents are caused, in this embodiment, a spring mounting post 5 is mounted on the front side of the rotating part 2-61 and the front side of the mounting bracket 2-2, a spring 6 for providing pre-stress is sleeved between the two spring mounting posts 5, and when the clamping jaw 2-6 is manually placed to pre-press the workpiece, a certain pre-pressing force can be realized under the action of the spring 6, so that the workpiece position is prevented from being deviated.

In the above embodiment, as shown in fig. 12, the clamping mechanism preferably further includes a three-position five-way middle-leakage type electromagnetic valve 7 and 4 adjustable check valves 8, wherein the three-position five-way middle-leakage type electromagnetic valve 7 includes an air source interface, an air outlet a, an air outlet B, a working interface a and a working interface B, the air source interface is used for connecting an external air source, the air outlet a and the air outlet B are used for exhausting air, the working interface a is respectively connected with air inlets of the air cylinders 2-4 of the two clamping modules through air pipes, the working interface B is respectively connected with air return ports of the air cylinders 2-4 of the two clamping modules through air pipes, and each air pipe is provided with an adjustable check valve 8 to control the extending or retracting speed of piston rods of the two air cylinders 2-4 so as to better protect the tooling and improve the stability thereof.

When in actual use, when a worker installs a workpiece, the three-position five-way medium-release electromagnetic valve 7 is in the middle position, and because the three-position five-way medium-release electromagnetic valve 7 is in the medium-release state, the air cylinders 2-4 positioned at two sides of the profiling block 1 are in the pressure release state, the worker can manually and easily put down the clamping jaws 2-6 to pre-press fabric cloth positioned on the surface of the steering column support in the profiling groove 1-2, after the steering column support and the fabric cloth are installed in place, the worker starts the equipment, the coil 14 of the three-position five-way medium-release electromagnetic valve 7 is powered on, the two air cylinders 2-4 are in the extending state, the clamping jaws 2-6 clamp the fabric cloth on the surface of the steering column support, the air cylinders 2-6 are ensured to be in the air pressure compression state, after the fabric cloth is welded, the three-position five-way medium-release electromagnetic valve 7 is powered off, the coil 12 is powered on, the two air cylinders 2-4 start to start turning over, the fabric cloth positioned on the surface of the steering column support is released, the clamping jaws 2-6 are turned up, after the three-position five-way medium-release electromagnetic valve 7 is powered on, the fabric is repeatedly welded, and the next step of the worker can take out the fabric cloth is carried out, and the manual production of the fabric is completed.

In the above embodiment, it is preferable that each cylinder 2-4 is provided with a cylinder position detecting module, each cylinder position detecting module includes a in-place detecting member 2-42 and a return detecting member 2-41, and the in-place detecting member 2-42 and the return detecting member 2-41 are cylinder position detecting magnetic switches for feeding back whether the cylinder 2-4 is the push-out position or the return position, thereby realizing monitoring of whether the holding jaw 2-6 is the clamping position or the opening position.

In the above embodiment, it is preferable to further include a control module to which the in-place detecting member 2-42, the return detecting member 2-41, the three-position five-way medium-release solenoid valve 7, and the 4 adjustable check valves 8 of each cylinder are electrically connected. The control module in this embodiment includes, but is not limited to, a PLC.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. Ultrasonic welding fixing tool for steering column, which is characterized by comprising:

The profiling block is provided with a profiling groove matched with the profile of the steering column support, one side of the profiling block is provided with a limiting block for limiting the steering column support to move outwards and a photoelectric detection piece for detecting whether the steering column support exists or not;

The clamping mechanism comprises two clamping modules which are symmetrically arranged on two sides of the profiling block, and the two clamping modules are used for compressing or releasing fabric cloth on the steering column bracket.

2. The ultrasonic welding fixture for a steering column of claim 1, further comprising a base plate, wherein the profiling block and the clamping mechanism are mounted on the base plate.

3. The ultrasonic welding fixture for the steering column, according to claim 2, is characterized in that the bottom of the profiling block is mounted on the substrate through a plurality of supports, a plurality of limiting blocks are arranged at the front edge of the profiling block corresponding to the profiling groove, and the limiting blocks can move in the direction towards or away from the profiling groove, so that the steering column supports are attached to the profiling block.

4. The ultrasonic welding fixture for a steering column according to claim 3, wherein a mounting part is formed by horizontally extending outwards of the bottom of the profiling block corresponding to each limiting block, and the bottoms of a plurality of limiting blocks are mounted on the corresponding mounting parts;

The mounting part is provided with a plurality of circular through holes, the limiting block is provided with a plurality of adjusting holes corresponding to the plurality of circular through holes, the plurality of adjusting holes penetrate through the limiting block in the vertical direction, the adjusting holes are long holes extending in the front-back direction of the imitation groove, and the adjusting screw rod sequentially penetrates through the long holes and the circular through holes from top to bottom.

5. The ultrasonic welding fixture for a steering column according to claim 1, wherein the photoelectric detection part is a photoelectric sensor, and the photoelectric sensor is installed at a front edge position of the profiling block corresponding to the profiling groove.

6. The ultrasonic welding fixture for a steering column of claim 2, wherein the clamping module comprises a mounting base plate, a mounting bracket, a connecting plate, a cylinder, a gear, a rack and a clamping jaw;

The mounting base plate is fixedly mounted on the base plate, the mounting bracket is mounted on one side, close to the profiling block, of the top of the mounting base plate in the vertical direction, the air cylinder is mounted on one side, far away from the profiling block, of the mounting base plate in the vertical direction, the connecting plate is mounted between the mounting bracket and the air cylinder in the vertical direction, and the connecting plate can ascend or descend in the vertical direction through the air cylinder;

The rack is arranged on one side, close to the mounting support, of the connecting plate in the vertical direction, a linear guide rail is arranged on one side, close to the connecting plate, of the mounting support in the vertical direction, a linear bearing is slidably arranged on the linear guide rail, a sliding groove matched with the sliding direction of the linear bearing is formed in one side, close to the mounting support, of the connecting plate, a gear meshed with the rack is arranged on the top of the mounting support, the clamping jaw is connected with the gear through the transmission shaft, and the clamping jaw can be folded upwards along with rotation of the transmission shaft to be opened or pressed downwards to be pressed on fabric cloth on the steering column support.

7. The ultrasonic welding fixture for the steering column according to claim 6, wherein the clamping jaw comprises a rotating part, a connecting part and a pressing part, the rotating part, the connecting part and the pressing part are sequentially and detachably connected to form a Z-shaped structure, and one end of the rotating part, which is far away from the connecting part, is connected with the gear through the transmission shaft;

When the rotating part swings downwards to a proper position, the pressing part presses against the fabric cloth on the steering column bracket, and when the rotating part swings upwards, the pressing part loosens the fabric cloth.

8. The ultrasonic welding fixture for a steering column according to claim 7, wherein a spring mounting column is mounted on the front side of the rotating portion and the front side of the mounting bracket, and a spring is sleeved between the two spring mounting columns.

9. The ultrasonic welding fixture for a steering column of claim 6, wherein the clamping mechanism further comprises a three-position five-way medium-release solenoid valve and a plurality of adjustable one-way valves;

The three-position five-way middle leakage type electromagnetic valve comprises an air source interface, an air outlet A, an air outlet B, a working interface A and a working interface B, wherein the working interface A is connected with air inlets of cylinders of two clamping modules through air pipes respectively, the working interface B is connected with air return inlets of cylinders of the two clamping modules through air pipes respectively, and each air pipe is provided with an adjustable one-way valve.

10. The ultrasonic welding fixture for a steering column according to claim 9, wherein each cylinder is provided with a cylinder position detection module;

Each cylinder position detection module comprises an in-place detection piece and a return detection piece.