CN111922213B - Wiper stay tube stamping die - Google Patents

Abstract

A punching and riveting die for a supporting tube of a windscreen wiper. The surfaces of the upper template opposite to the lower template are both provided with sliding chutes. The fixture includes: the fixed seat is arranged in the sliding groove of the lower template in a sliding manner, the fixed seat is provided with a fixed shaft and a rotation preventing shaft which are vertical to the lower template, and the distance between the fixed shaft and the rotation preventing shaft is adjustable; the pressing block is arranged in the sliding groove of the upper template in a sliding mode, the projection of the pressing block along the axis of the fixed shaft covers the fixed shaft, and the pressing block can move along the axis of the fixed shaft. The punching press subassembly corresponds fixture and respectively is equipped with a pair ofly, and the punching press subassembly includes: a semicircular hole is processed on the bottom surface of the guide block, a plurality of guide holes are processed perpendicular to the bottom surface, and the projection of the guide holes on the bottom surface of the guide block is positioned in the semicircular hole; the assembly bottom plate is located to the drift, and the drift passes the guiding hole, is equipped with elastic element between assembly bottom plate and the guide block, and during the punching press, the drift front end inserts in the semicircle orifice, and during non-operating condition, the drift front end hides in the guiding hole. Simple structure, centre gripping efficiency and precision are high, can be used to the punching of multiple stay tube and rivet work.

Description

Wiper stay tube stamping die

Technical Field

The invention belongs to the production field of a windscreen wiper, and particularly relates to a punching and riveting die for a supporting tube of the windscreen wiper.

Background

In order to reduce the weight and simultaneously take structural characteristics and strength into consideration, a common wiper support tube is generally designed into two parts, as shown in fig. 10, a thin-wall pipe is adopted in the middle part, casting parts with better molding strength are adopted at two ends, and then the pipe and the joint are connected in a stamping mode.

In order to ensure the position accuracy after the punching connection, the joint needs to be positioned and clamped during the punching, the existing positioning mode is as shown in fig. 11, the joint is positioned and clamped by adopting a screw rod pressing mode, the screw rod needs to be disassembled and assembled once when one supporting tube is produced, the production efficiency is low, the risk is high when an operator stretches a hand into the middle of a die for disassembling and assembling for a long time, the wiper joint is easily driven to rotate together when the screw rod is rotated for pressing, the position of the wiper joint and a pipe fitting is changed, and the position accuracy of a finished product is reduced.

And as shown in fig. 11, the existing stamping die main body is made of 4 pressing plates, the middle two pressing plates are used for installing the clamping block, the two pressing plates positioned on the outer side are used for installing the punch, the punch penetrates through the clamping block and the middle two plates to perform stamping connection on the supporting tube, the die clamping block and the punch of the structure are fixed in position, the supporting tube of the structure can be produced correspondingly, the die is large in size and heavy in mass, the punch is inconvenient to maintain and replace, and the die is high in overall manufacturing cost.

Disclosure of Invention

In order to solve the defects of the prior art, the invention provides the punching and riveting die for the supporting tube of the windscreen wiper, which is characterized in that a clamping mechanism is used for clamping a windscreen wiper joint, manual locking is not needed, and the windscreen wiper joint can be prevented from rotating; the guide block and the punch for punching and riveting are combined to form a punching module by adopting a modular design, so that the replacement and maintenance are convenient; this application only is equipped with cope match-plate pattern and lower bolster, and fixture and all can carry out position control on cope match-plate pattern or lower bolster from stamping die to the work is riveted in dashing of the wiper stay tube of convenient not unidimensional structure.

In order to realize the purpose of the invention, the following scheme is adopted:

a punching and riveting die for a supporting tube of a windscreen wiper comprises: the stamping die comprises an upper die plate, a lower die plate, a clamping mechanism and a stamping assembly.

The surfaces of the upper template opposite to the lower template are both provided with sliding chutes.

Fixture is equipped with a pair ofly, fixture includes fixing base and briquetting, the fixing base slides and locates in the spout of lower bolster, the fixing base is equipped with the perpendicular to the fixed axle of lower bolster with prevent changeing the axle, the fixed axle is adjustable with the interval of preventing the pivot, the briquetting slides and locates the spout of cope match-plate pattern, the briquetting is followed the projection of fixed axle axis covers the fixed axle, the axis removal of fixed axle can be followed to the briquetting.

The punching components are used in pairs, a pair of punching components is arranged corresponding to the clamping mechanisms respectively, one group of the punching components in each pair is arranged in the sliding groove of the upper template in a sliding mode, the other group of the punching components is arranged in the sliding groove of the lower template in a sliding mode, and the punching components comprise:

the guide block, the guide block bottom surface processing has the semicircle orifice, and perpendicular to bottom surface processing has a plurality of guiding holes, and the guiding hole is in the projection of guide block bottom surface is located the semicircle orifice.

The punch is arranged on the assembly bottom plate, the punch penetrates through the guide hole, an elastic element is arranged between the assembly bottom plate and the guide block, the front end of the punch is inserted into the semicircular hole during punching, and the front end of the punch is hidden in the guide hole during a non-working state.

Furthermore, guide rods are arranged on the periphery of the upper template and the periphery of the lower template.

Furthermore, elastic element is pressure spring, the subassembly bottom plate with the binding face processing of guide block has the spring seat hole, elastic element locates in the spring seat hole, the coaxial processing of spring seat hole bottom of guide block has the screw hole, the coaxial processing of spring seat hole of subassembly bottom plate has the counter bore, the counter bore with lead to the axle processing bottom plate through-hole between the spring seat hole, guide screw in proper order the clearance pass counter bore, bottom plate through-hole and elastic element connect in the screw hole, during the punching press subassembly natural state, guide screw nut top surface with the distance of subassembly bottom plate bottom surface is greater than the subassembly bottom plate with the distance between the guide block binding face.

Furthermore, the assembly bottom plate is provided with two strip-shaped holes A which are parallel to each other, and the strip-shaped holes A are perpendicular to the sliding grooves of the upper template or the lower template.

Further, the fixing base comprises a connecting plate, the connecting plate is provided with a connecting block, and the fixing shaft is detachably arranged at the top of the connecting block.

Furthermore, the connecting block is perpendicular to the rectangular hole has been seted up to the direction of fixed axle, it is equipped with the rectangle strip to slide in the rectangular hole, prevent changeing axle detachable connect in the rectangle strip.

Furthermore, an adjusting groove is formed in the side wall of the rectangular strip, a locking screw penetrates through the side wall of the connecting block at a position corresponding to the adjusting groove, and the front end of the locking screw is located in the adjusting groove.

Furthermore, the connecting plate is provided with two strip-shaped holes B which are parallel to each other, and the strip-shaped holes B are perpendicular to the sliding grooves of the upper template or the lower template.

Further, the upper surface of briquetting is equipped with the spring, the other end of spring is equipped with the mounting panel, the mounting panel with the briquetting is parallel, the briquetting passes through the mounting panel with the cope match-plate pattern links to each other.

Furthermore, U-shaped grooves are formed in two ends of the mounting plate and are perpendicular to the sliding grooves of the upper template or the lower template.

The invention has the beneficial effects that:

1. the clamping efficiency is high, the pressing block is matched with the fixed seat to clamp the windscreen wiper joint in the process of pressing the upper template downwards, the screw is not required to be reused for pressing, the time for tightening and loosening the screw is saved, and meanwhile, the risk caused by tightening the screw is reduced;

2. the clamping precision is high, the position precision of a supporting rod product can be improved, the pressing block is utilized to vertically and downwards press the windscreen wiper joint, the windscreen wiper joint is prevented from generating rotating force from the source, the clamping mechanism is provided with the anti-rotating shaft, the mounting precision between the windscreen wiper joint and a pipe fitting can be further guaranteed, and meanwhile, the windscreen wiper joint is prevented from rotating due to other factors;

3. the punch and the guide block which are directly used for punching and riveting are integrated and designed into a punching module, the punching module and the upper template and the lower template form a single unit, and the clamping mechanism and the punching and riveting assembly tool can be adjusted in the centering position on the upper template or the lower template so as to be convenient for matching the structures and the shapes of different windscreen wiper support tubes;

4. the die is simple in structure, the size of the upper die plate is the same as that of the lower die plate, the clamping mechanism and the stamping assembly are used in pairs, the structures of the single bodies are completely the same, and the whole die is equivalent to the structure formed by only three parts, namely the die plate, the clamping mechanism and the stamping assembly, so that the manufacturing cost of the die is reduced, and the maintenance and the replacement of each part are convenient.

Drawings

The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.

FIG. 1 illustrates a use state of the present application;

FIG. 2 shows a cross-sectional view of the punch assembly;

FIG. 3 shows an overall constructional view of the punching assembly in the inactive condition;

fig. 4 shows an exploded view of the structure of the holder;

FIG. 5 is a diagram showing the connection of compacts and associated parts;

FIG. 6 shows an overall view of the upper and lower punch die sets just touching;

FIG. 7 is a view showing the positional relationship of the guide block, the punch and the bottom plate of the assembly upon contact of the upper and lower punching die sets;

FIG. 8 shows an overall view of the present application upon completion of the punch riveting;

FIG. 9 is a view showing the positional relationship of the guide block, punch and assembly base plate upon completion of the clinching;

fig. 10 is a configuration diagram showing a wiper blade supporting tube;

fig. 11 shows an overall view of a prior art mold.

The labels in the figure are: 1-wiper connector, 2-bearing hole, 3-mounting groove, 4-pipe fitting, 11-upper template, 12-lower template, 13-guide rod, 20-clamping mechanism, 21-fixing seat, 211-fixing shaft, 212-rotation preventing shaft, 213-connecting plate, 2131-strip-shaped hole B, 214-connecting block, 2141-rectangular hole, 215-rectangular strip, 2151-adjusting groove, 216-locking screw, 22-pressing block, 221-spring, 222-mounting plate, 2221-U-shaped groove, 30-punching component, 31-guide block, 311-semicircular hole, 312-guide hole, 313-threaded hole, 32-punch, 33-component bottom plate, 331-counter bore, 332-bottom plate through hole, 333-strip-shaped hole A, 34-elastic element, 35-spring seat hole, 36-guide screw.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings, but the described embodiments of the present invention are a part of the embodiments of the present invention, not all of the embodiments of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are usually placed in when used, and are only for convenience of describing the present invention and simplifying the description. The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. The terms "parallel", "perpendicular", etc. do not require that the components be absolutely parallel or perpendicular, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; either directly or indirectly through intervening media, or through both elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Example 1

As shown in fig. 1 to 11, a wiper support tube riveting die includes an upper die plate 11, a lower die plate 12, a clamping mechanism 20, and a punching assembly 30.

Specifically, chutes are processed on the opposite surfaces of the upper template 11 and the lower template 12, the integral mechanisms of the upper template 11 and the lower template 12 and the chutes have the same structure, the chutes are of a T-shaped groove structure and are arranged along the length direction of the upper template 11 or the lower template 12, and the axis of the pipe fitting 4 is parallel to the chutes when the wiper support pipe is placed;

specifically, the clamping mechanisms 20 are provided with a pair, each clamping mechanism 20 comprises a fixed seat 21 and a pressing block 22, the fixed seats 21 are slidably arranged in a sliding chute of the lower template 12, the fixed seats 21 are provided with fixed shafts 211 perpendicular to the lower template 12 and anti-rotation shafts 212, the common windscreen wiper joints 1 are provided with bearing holes 2 for mounting rotating shaft bearings of windscreen wipers, when the windscreen wiper joints 1 are clamped, the fixed shafts 211 are inserted into the bearing holes 2 to be matched with the bearing holes 2, the windscreen wiper joints 1 are fixed, the anti-rotation shafts 212 are inserted into the mounting grooves 3 in the windscreen wiper joints 1, and the windscreen wiper joints 1 are further limited in position and prevented from rotating around the fixed shafts 211;

in a further preferable scheme, the distance between the fixing shaft 211 and the rotation-preventing shaft 212 is designed to be an adjustable structure, and when the distances between the bearing holes 2 and the mounting grooves 3 of different windscreen wiper support tubes are inconsistent, the distance between the fixing shaft 211 and the rotation-preventing shaft 212 can be adjusted to match;

the pressing block 22 is arranged in a sliding groove of the upper die plate 11 in a sliding mode, the pressing block 22 is of a disc-shaped structure and coaxial with the fixing shaft 211, the projection of the pressing block 22 along the axis of the fixing shaft 211 covers the fixing shaft 211, the pressing block 22 can move along the axis of the fixing shaft 211, pressure is still applied to the wiper connector 1 in the moving process, the pressure can be gradually increased along with the descending of the upper die plate 11 and gradually decreased along with the ascending of the upper die plate 11, the pressing block 22 is in contact with the top surface of the wiper connector 1 and gradually compresses the top surface of the wiper connector 1 when the upper die plate 11 moves downwards, and in order to prevent the pressing block 22 from crushing the wiper connector 1, the plane of the pressing block 22 is required to completely cover the top surface of the wiper connector 1.

Specifically, the punching press subassembly 30 uses in pairs, and it is a pair of respectively to correspond fixture 20, and punching press module 30 sets up between fixture 20, and the spout of cope match-plate pattern 11 is located to a set of slip among them to each pair of punching press subassembly 30, and the spout of lower bolster 12 is located in another group's slip, and punching press subassembly 30 includes: a guide block 31 and a punch 32.

More specifically, the bottom surface of the guide block 31 is processed with a semicircular hole 311, when the bottom surfaces of the two sets of stamping modules 30 are attached to each other, the semicircular hole 311 forms a completed circular hole structure, the circular hole is attached to the outer wall of the pipe fitting 4, a plurality of guide holes 312 are processed perpendicular to the bottom surface of the guide block 31, and the projection of the guide holes 312 on the bottom surface of the guide block 31 is located in the semicircular hole 311;

more specifically, the punch 32 is provided to the assembly base plate 33, the punch 32 passes through the guide hole 312, and the elastic member 34 is provided between the assembly base plate 33 and the guide block 31. As shown in fig. 8 and 9, during punching and riveting, the front end of the punch 32 is inserted into the semicircular hole 311, and the punch 32 is matched with the concave pit on the surface of the wiper blade joint 1 to form a punching mark on the pipe fitting 4, so that the wiper blade joint 1 and the pipe fitting 4 can be connected; as shown in fig. 3, in the non-operating state, the front end of the punch 32 is housed in the guide hole 312.

Example 2

The structure and operation of the punching assembly will be further explained with reference to the drawings. The elastic element 34 is a pressure spring, a spring seat hole 35 is processed on the joint surface of the assembly bottom plate 33 and the guide block 31, the elastic element 34 is arranged in the spring seat hole 35, a threaded hole 313 is coaxially processed at the bottom of the spring seat hole 35 of the guide block 31, a counter bore 331 is coaxially processed at the spring seat hole 35 of the assembly bottom plate 33, a bottom plate through hole 332 is processed between the counter bore 331 and the spring seat hole 35 through a shaft, a guide screw 36 sequentially penetrates through the counter bore 331, the bottom plate through hole 332 and the elastic element 34 to be connected to the threaded hole 313, only the part of the front end of the guide screw 36 matched with the threaded hole 313 is a screw mechanism, the rest part of the screw is a polish rod structure, when the stamping assembly 30 is in a natural state, as shown in figure 2, the distance A between the top surface of the nut of the guide screw 36 and the bottom surface of the assembly bottom plate 33 is larger than the distance B between the joint surface of the assembly bottom plate 33 and the guide block 31, when the guide block 31 is jointed with the assembly bottom plate 33, at this time, in the position where the riveting is completed, the guide screw 36 will move along the axis relative to the assembly bottom plate 33, so that the distance a becomes smaller and smaller, and in order to prevent the nut of the guide screw 36 from contacting the upper die plate 11 or the lower die plate 12, the protruding distance of the punch 32 is insufficient, thereby affecting the structural strength of the riveting.

Example 3

As shown in fig. 4, the fixing base 21 includes a connecting plate 213, the connecting plate 213 is provided with a connecting block 214, the connecting block 214 may be designed to be a rectangular structure or a cylindrical structure, a top surface of the connecting block 214 is used for supporting the wiper connector 1, the fixing shaft 211 is detachably disposed at a top of the connecting block 214, the fixing shaft 211 is connected to the connecting block 214 by a screw connection manner, in order to rotate the fixing shaft 211, notch planes parallel to each other are formed on a peripheral side of the fixing shaft 211, and it is convenient to rotate the fixing shaft 211 by a wrench.

The connecting block 214 is provided with a rectangular hole 2141 in a direction perpendicular to the fixing shaft 211, the rectangular hole 2141 is parallel to the sliding groove of the lower template 12, a rectangular strip 215 is slidably arranged in the rectangular hole 2141, and the rotation-preventing shaft 212 is detachably connected to the rectangular strip 215. The anti-rotation shaft 212 is sequentially provided with a polished rod section, a nut and a thread from top to bottom, the nut is connected to the rectangular strip 215 through the thread, the nut is used for convenient rotation, and the polished rod section is used for matching with the mounting groove 3.

With fixed axle 211 and the pivot 212 of preventing changeing all design detachable structure, when the purpose is used for producing the wiper stay tube that has not unidimensional dead eye 2 and mounting groove 3, only need to change fixed axle 211 and prevent changeing pivot 212 can, avoid the sacrum to change fixing base 21 to reduce the cost of manufacture of mould, also convenient to use.

More specifically, the distance adjustment method between the fixed shaft 211 and the rotation-preventing shaft 212 is further described, an adjusting groove 2151 is formed in the side wall of the rectangular bar 215 along the direction parallel to the rectangular hole 2141, a locking screw 216 is inserted into the side wall of the connecting block 214 corresponding to the adjusting groove 2151, the front end of the locking screw 216 is located in the adjusting groove 2151, the rectangular bar 215 moves in the rectangular hole 2141, so that the distance between the fixed shaft 211 and the rotation-preventing shaft 212 is changed, and the locking screw 216 is used for pressing the rectangular bar 215 to prevent the movement. For the adjustment operation, the locking screw 216 is a wing bolt.

Example 4

As shown in fig. 5, the related parts of the pressing block 22 and the connection relationship therebetween will be further explained. The upper surface of the pressing block 22 is provided with a spring 221, the other end of the spring 221 is provided with a mounting plate 222, the mounting plate 222 is parallel to the pressing block 22, the spring 221 can be connected with the pressing block 22 and the mounting plate 222 in a welding mode, and the pressing block 22 is connected with the upper template 11 through the mounting plate 222. The movement of the pressing piece 22 along the axis of the fixing shaft 211 is realized by the spring 221, so that the wiper blade joint 1 starts to be pressed by the pressing piece 22 between the riveting and the pressure is gradually increased, as shown in fig. 8, when the riveting is just finished, the spring 221 still does not reach the compression limit.

Preferably, guide rods 13 are arranged around the upper template 11 and the lower template 12. The guide rod 13 comprises an outer guide rod and an inner guide rod, the inner guide rod is arranged inside the outer guide rod in a sliding mode, the outer guide rod and the inner guide rod are arranged on the upper template 11 and the lower template 12 respectively, and the guide rod 13 is connected with the upper template 11 and the lower template 12 in a screw fixing mode so as to be convenient to disassemble and assemble.

Preferably, as shown in fig. 3, the module base plate 33 is formed with two strip-shaped holes a333 parallel to each other, and the strip-shaped holes a333 are perpendicular to the sliding grooves of the upper mold plate 11 or the lower mold plate 12. As shown in fig. 4, the connecting plate 213 is provided with two parallel strip holes B2131, and the strip holes B2131 are perpendicular to the sliding grooves of the upper mold plate 11 or the lower mold plate 12. As shown in fig. 5, two ends of the mounting plate 222 are provided with U-shaped grooves 2221, and the U-shaped grooves 2221 are perpendicular to the sliding grooves of the upper template 11 or the lower template 12. In order to be convenient to be matched with windscreen wiper support tubes with different structural shapes for use, the positions of all parts are adjusted by utilizing the sliding grooves of the upper template 11 and the lower template 12, and meanwhile, fine adjustment on the positions is carried out through the strip-shaped holes A333, the strip-shaped holes B2131 and the U-shaped grooves 2221, the application range of the die is further expanded, and the positioning and riveting precision is improved.

The working principle of the invention is as follows: firstly, the connection principle of each part of the wiper supporting tube is briefly explained. The connecting part of the windscreen wiper joint 1 and the pipe fitting 4 is provided with a pit, after the windscreen wiper joint 1 is inserted into the pipe fitting 4, the position, corresponding to the pit, on the surface of the pipe fitting 4 is punched by the punch 32, so that the pipe fitting 4 forms a dent with a structure similar to that of the pit, and the windscreen wiper joint 1 and the pipe fitting 4 are connected together.

According to the structure of the sample wiper support tube, the positions of the clamping mechanism 20 and the punching assembly 30 are adjusted, and according to the embodiment, two wiper joints 1 are respectively inserted into two ends of the pipe fitting 4; then, the windscreen wiper joints 1 at the two ends are respectively arranged on the clamping mechanisms 20 at the two ends through the bearing holes 2 and the mounting grooves 3, so that the joints of the windscreen wiper joints 1 and the pipe fittings 4 are placed in the semicircular holes 311; the punching and riveting work is started, the upper die plate 11 starts to move downwards gradually, the press block 22 is firstly contacted with the wiper connector 1 and is used for gradually pressing the wiper connector 1 through the pressure of the spring 221, then the bottom surfaces of the guide blocks 31 arranged in pairs are contacted as shown in fig. 6 and 7, the punch 32 is still hidden in the guide hole 312 at the moment, the upper die plate 11 continues to move downwards, the punch 32 starts to extend out of the guide hole 312 until the guide blocks 31 are contacted with the assembly bottom plate 33, and as shown in fig. 8 and 9, the punch 32 finishes extending out and is matched with the pits on the wiper connector 1 to punch dents on the surface of the pipe 4, so that the wiper connector 1 is connected with the pipe 4; then, the upper die plate 11 is moved up to a predetermined position, and the wiper support tube is taken out.

The foregoing is only a preferred embodiment of the present invention and is not intended to be exhaustive or to limit the invention. It will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention.

Claims (8)

1. The utility model provides a wiper stay tube is towards riveting mould which characterized in that includes: the device comprises an upper template (11), a lower template (12), a clamping mechanism (20) and a stamping assembly (30);

the surfaces of the upper template (11) and the lower template (12) which are opposite are respectively provided with a sliding chute;

the clamping mechanism (20) is provided with a pair of clamping mechanisms, each clamping mechanism (20) comprises a fixing seat (21) and a pressing block (22), each fixing seat (21) is arranged in a sliding groove of the lower template (12) in a sliding mode, each fixing seat (21) is provided with a fixing shaft (211) perpendicular to the lower template (12) and an anti-rotating shaft (212), the distance between each fixing shaft (211) and the anti-rotating shaft (212) is adjustable, each pressing block (22) is arranged in the sliding groove of the upper template (11) in a sliding mode, the fixing shafts (211) are covered by the pressing blocks (22) along the projection of the axis of the fixing shafts (211), each pressing block (22) can move along the axis of the corresponding fixing shaft (211), each fixing seat (21) comprises a connecting plate (213), each connecting plate (213) is provided with a connecting block (214), each fixing shaft (211) is detachably arranged at the top of each connecting block (214), each connecting block (214) is perpendicular to the direction of the corresponding fixing shaft (211) and is provided with a rectangular hole (2141), a rectangular strip (215) is arranged in the rectangular hole (2141) in a sliding mode, and the anti-rotation shaft (212) is detachably connected to the rectangular strip (215);

the punching components (30) are used in pairs, a pair of the punching components is arranged corresponding to the clamping mechanism (20), one group of the punching components (30) in each pair is arranged in the sliding groove of the upper template (11) in a sliding mode, the other group of the punching components is arranged in the sliding groove of the lower template (12) in a sliding mode, and the punching components (30) comprise:

the guide block (31), the bottom surface of the guide block (31) is processed with a semicircular hole (311), a plurality of guide holes (312) are processed perpendicular to the bottom surface, and the projection of the guide holes (312) on the bottom surface of the guide block (31) is positioned in the semicircular hole (311);

the punch (32) is arranged on the assembly bottom plate (33), the punch (32) penetrates through the guide hole (312), an elastic element (34) is arranged between the assembly bottom plate (33) and the guide block (31), when punching and riveting are conducted, the front end of the punch (32) is inserted into the semicircular hole (311), and when the punch is in a non-working state, the front end of the punch (32) is hidden in the guide hole (312).

2. The punching and riveting die for the support tube of the windscreen wiper as set forth in claim 1, wherein guide rods (13) are arranged around the upper die plate (11) and the lower die plate (12).

3. The punch-riveting die for the supporting tube of the wiper blade as recited in claim 1, wherein the elastic element (34) is a compression spring, the abutting surface of the assembly bottom plate (33) and the guide block (31) is formed with a spring seat hole (35), the elastic element (34) is disposed in the spring seat hole (35), a threaded hole (313) is coaxially formed at the bottom of the spring seat hole (35) of the guide block (31), a counter bore (331) is coaxially formed in the spring seat hole (35) of the assembly bottom plate (33), a bottom plate through hole (332) is coaxially formed between the counter bore (331) and the spring seat hole (35), a guide screw (36) sequentially passes through the counter bore (331), the bottom plate through hole (332) and the elastic element (34) to be connected to the threaded hole (313), and when the punch assembly (30) is in a natural state, the distance between the top surface of the guide screw (36) and the bottom surface of the assembly bottom plate (33) is larger than the distance between the assembly bottom plate (33) and the abutting surface of the guide block (31).

4. The punch riveting die for the support tube of the windscreen wiper as set forth in claim 1, wherein two strip-shaped holes a (333) are formed in the assembly bottom plate (33) in parallel, and the strip-shaped holes a (333) are perpendicular to a sliding groove of the upper die plate (11) or the lower die plate (12).

5. The punch-riveting die for the support tube of the wiper blade as claimed in claim 1, wherein an adjusting groove (2151) is formed in the side wall of the rectangular bar (215), a locking screw (216) is inserted into the side wall of the connecting block (214) at a position corresponding to the adjusting groove (2151), and the front end of the locking screw (216) is located in the adjusting groove (2151).

6. The punch riveting die for the support tube of the windscreen wiper as set forth in claim 1, wherein the connecting plate (213) is provided with two strip-shaped holes B (2131) parallel to each other, and the strip-shaped holes B (2131) are perpendicular to the sliding grooves of the upper mold plate (11) or the lower mold plate (12).

7. The punch riveting die for the support tube of the wiper blade as recited in claim 1, wherein a spring (221) is arranged on the upper surface of the pressing block (22), a mounting plate (222) is arranged at the other end of the spring (221), the mounting plate (222) is parallel to the pressing block (22), and the pressing block (22) is connected with the upper die plate (11) through the mounting plate (222).

8. The punching and riveting die for the supporting tube of the windscreen wiper as set forth in claim 7, wherein two ends of the mounting plate (222) are provided with U-shaped grooves (2221), and the U-shaped grooves (2221) are perpendicular to the sliding grooves of the upper template (11) or the lower template (12).

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