CN111250600B

CN111250600B - Hollow pipe pedal arm forming and rolling die and machining process thereof

Info

Publication number: CN111250600B
Application number: CN202010053370.7A
Authority: CN
Inventors: 张鹏
Original assignee: Kunshan Xinshunxin Precision Mould Co ltd
Current assignee: Kunshan Xinshunxin Precision Mould Co ltd
Priority date: 2020-01-17
Filing date: 2020-01-17
Publication date: 2021-06-29
Anticipated expiration: 2040-01-17
Also published as: CN111250600A

Abstract

The invention provides a hollow tube pedal arm forming and rolling die and a processing technology thereof, and the die comprises an upper die, a lower die and a conveying arm positioned on the lower die, wherein a punching mechanism, a flanging mechanism, a bending mechanism and a rolling mechanism are sequentially arranged on the lower die; the pinch roller mechanism includes the mount pad, be connected with the pivot on the mount pad, be connected with the V-arrangement wheel in the pivot, the pivot both ends are equipped with the leading wheel, the V-arrangement wheel corresponds the arc carries the position just the leading wheel stretch in the curve inslot, this mould is through continuous mould, realizes stamping forming, turn-ups, bend and the mode of rounding, through the mode to the conveying of work piece, has solved the work piece little and the problem that the progress reduces when the rounding.

Description

Hollow pipe pedal arm forming and rolling die and machining process thereof

Technical Field

The invention relates to the field of die stamping, in particular to a hollow tube pedal arm forming and rounding die and a processing technology thereof.

Background

The product shown in fig. 1, which is a connecting rod of an automobile pedal, is generally of a hollow structure and has a certain curvature at the end, in the prior art, the punching bending, flanging and punching round are generally realized in the form of a punching die, but since the punching bending and the bending in the previous steps are carried out and then the round is punched, the part itself is small, and then the circular arc is punched, the realization is difficult, or even if the circular arc can be bent, the precision is not enough.

Disclosure of Invention

In order to solve the technical problem, the invention provides a hollow tube pedal arm forming and rounding die which comprises an upper die, a lower die and a conveying arm positioned on the lower die, wherein a punching mechanism, a flanging mechanism, a bending mechanism and a rounding mechanism are sequentially arranged on the lower die, and the conveying arm is positioned on two sides of the lower die and used for conveying workpieces;

the punching mechanism comprises a punching female die and a punching male die which are respectively positioned on the lower die and the upper die,

the flanging mechanism comprises a positioning plate, a flanging plate and a corresponding protruding part, the positioning plate is positioned on the lower die, the corresponding protruding part is positioned on the upper die, the width of a product groove of the flanging plate is smaller than that of the product groove of the positioning plate, two sides of the product groove of the flanging plate are provided with protruding plates, and the opposite sides of the protruding plates are provided with arc-shaped parts;

the bending mechanism comprises a V-shaped assembly, a fine adjustment assembly and a bending protruding part, wherein the V-shaped assembly is positioned on the lower die, and the bending protruding part is positioned on the upper die;

the edge rolling mechanism comprises an arc-shaped loading position on the lower die and a pinch roller mechanism on the upper die, two driving blocks are arranged on two sides of the arc-shaped loading position, and embedded curve grooves are formed in the driving blocks; the pinch roller mechanism comprises a mounting seat, a rotating shaft is connected to the mounting seat, V-shaped wheels are connected to the rotating shaft, guide wheels are arranged at two ends of the rotating shaft, and the V-shaped wheels correspond to the arc-shaped load positions and stretch into the curve grooves.

Preferably, the conveying arm comprises a first positioning rod and a second positioning rod which are parallel, and grabbing rods are arranged on the first positioning rod and the second positioning rod; a plurality of first clamping jaws are arranged on the first positioning rod, and a first clamping jaw and a second clamping jaw are arranged on the second positioning rod.

Preferably, the first clamping jaw comprises a first clamping plate, a first pressing plate is arranged on the first clamping plate, and a gap is formed between the first pressing plate and the first clamping plate.

Preferably, the second clamping jaw comprises a U-shaped bottom plate, a wedge-shaped surface is arranged at the bottom of the U-shaped bottom plate, and a second pressing sheet is arranged on the U-shaped bottom plate.

Preferably, the V-shaped assembly comprises a V-shaped plate, and positioning pins are arranged on two sides of the V-shaped plate.

Preferably, the fine adjustment assembly comprises two groups of grouping blocks arranged in two rows, wherein the inner sides of the grouping blocks are provided with shaping blocks, and the opposite sides of the shaping blocks are inclined planes or vertical planes.

Preferably, the mounting seat is slidably connected to the upper die through a sliding rail.

A processing technology of a hollow tube pedal arm comprises the following steps:

s1, punching the long strip-shaped raw material to form a planar trapezoidal structure;

s2: flanging the edge of the trapezoidal structure;

s3: stamping into a V shape through a V-shaped groove structure;

s4: finely adjusting the plate body punched into the V shape for one time to reduce the opening of the V shape;

s5: performing secondary fine adjustment, wherein the V-shaped opening is closed to form a tubular structure;

s6: pressing down the end part of the tubular structure through a compression roller, and performing primary bending and shaping on the end part;

s7: and performing secondary bending and shaping to obtain a final finished product.

The invention provides a hollow tube pedal arm forming rounding die which has the following beneficial effects: the die realizes the modes of punch forming, flanging, bending and rounding in the continuous die, and solves the problem that the progress is reduced when the workpiece is small and rounded by the mode of conveying the workpiece.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below.

FIG. 1 is a schematic view of a machined workpiece according to the present invention;

FIG. 2 is a schematic perspective view of the present invention;

FIG. 3 is a schematic top mold of the present invention;

FIG. 4 is a schematic view of a lower die of the present invention;

FIG. 5 is a schematic view of a transfer arm of the present invention;

FIG. 6 is a schematic view of a first jaw of the present invention;

FIG. 7 is a schematic view of a second jaw of the present invention;

FIG. 8 is a schematic view of a turn-up plate of the present invention;

FIG. 9 is a schematic view of a trim assembly of the present invention;

FIG. 10 is a schematic view of the pinch roller mechanism of the present invention;

FIG. 11 is a schematic view of an arc-shaped loading position of the present invention;

wherein, 1, an upper die; 2. a lower die; 3. a transfer arm; 4. a punching mechanism; 5. a flanging mechanism; 6. a bending mechanism; 7. a rolling mechanism; 8. punching a female die; 9. punching a male die; 10. positioning a plate; 11. a flanging plate; 12. a protrusion; 13. a product tank; 14. an arc-shaped portion; 15. a pinch roller mechanism; 16. a drive block; 17. a curved groove; 18. a mounting seat; 19. a slide rail; 20. a V-shaped wheel; 21. a guide wheel; 22. a first positioning rod; 23. a second positioning rod; 24. a grabbing rod; 25. a first jaw; 26. a second jaw; 27. a first splint; 28. a first tablet; 29. a U-shaped bottom plate; 30. a wedge-shaped surface; 31. a second tabletting; 32. a V-shaped plate; 33. a positioning pin; 34. grouping the blocks; 35. and (4) shaping the block.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in fig. 2, 3 and 4, the invention provides a hollow tube pedal arm forming and rounding die, which comprises an upper die 1, a lower die 2 and a conveying arm 3 positioned on the lower die 2, wherein a punching mechanism 4, a flanging mechanism 5, a bending mechanism 6 and a rounding mechanism 7 are sequentially arranged on the lower die 2, and the conveying arm 3 is positioned on two sides of the lower die 2 and used for conveying workpieces;

the working mode of the invention is as follows: s1, punching the long strip-shaped raw material to form a planar trapezoidal structure; the punching mechanism 4 corresponds to the punching process, the punching mechanism 4 comprises a punching female die 8 and a punching male die 9, the punching female die 8 and the punching male die 9 are respectively positioned on the lower die 2 and the upper die 1, and the male die and the female die on the upper portions are matched with each other to punch a prototype, which is a plate body basically in a trapezoidal structure.

And the trapezoidal plate body after punching is grabbed to the next station through the transfer arm 3, and the structure of the transfer arm 3 is as follows: as shown in fig. 5-7, the transfer arm 3 includes a first positioning rod 22 and a second positioning rod 23 which are parallel to each other, and a grabbing rod 24 is disposed on the first positioning rod 22 and the second positioning rod 23; the first positioning rod 22 is provided with a plurality of first clamping jaws 25 in an array mode, the second positioning rod 23 is provided with a first clamping jaw 25 and a second clamping jaw 26, the first positioning rod 22 and the second positioning rod 23 are located on two sides of the lower die 2 respectively, namely two ends of a workpiece are positioned, and specifically, a grabbing rod 24 of the first positioning rod 22 and the second positioning rod 23 is grabbed through a manipulator (not shown).

Specifically, as shown in fig. 6 and 7, the first clamping jaw 25 includes a first clamping plate 27, a first pressing plate 28 is disposed on the first clamping plate 27, and a gap is disposed between the first pressing plate 28 and the first clamping plate 27 so as to accommodate the gripping of a workpiece that is not yet bent.

The second clamping jaw 26 comprises a U-shaped bottom plate 29, a wedge-shaped surface 30 is arranged at the bottom of the U-shaped bottom plate 29, a second pressing sheet 31 is arranged on the U-shaped bottom plate 29, and the end portion of the workpiece bent and turned over can be inserted in the mode of matching the wedge-shaped surface 30 through the U-shaped structure, so that the grabbing accuracy is improved.

Secondly, flanging the edge of the trapezoidal structure, and grabbing the edge to a flanging mechanism 5 through a conveying arm 3, wherein the flanging mechanism 5 comprises a positioning plate 10, a flanging plate 11 and a corresponding protruding part 12, the positioning plate 10 is positioned on the lower die 2, the corresponding protruding part 12 is positioned on the upper die 1, the width of a product groove 13 of the flanging plate 11 is smaller than that of a product groove 13 of the positioning plate 10, two sides of the product groove 13 of the flanging plate 11 are provided with convex plates, and the opposite sides of the convex plates are provided with arc parts 14; when pushing down through last mould 1, will remove to the product groove 13 on the turn-ups board 11 on, the effect of locating plate 10 is, takes out the back in the last station, does and stops, prevents directly to send into the turn-ups when screens scheduling problem, and the product groove 13 width of turn-ups board 11 is less than the work piece, so when last mould 1 goes up corresponding protruding portion 12 and pushes down, can be with the border of product the protruding board turn-ups, realize the turn-ups.

The third step is then punched into V-arrangement through the structure in V-arrangement groove, and this step is through V-arrangement board 32, V-arrangement board 32 both sides are equipped with pilot pin 33, and pilot pin 33 can be inserted in the downthehole location at work piece both ends, off tracking when preventing to bend, and is same, sends into the V-arrangement inslot through conveying arm 3 with the work piece on the good limit of turning over, mechanism 6 of bending is including being located V-arrangement subassembly, the fine setting subassembly on lower mould 2 and the protruding portion of bending that is located on last mould 1 bend the stamping forming of protruding portion through last mould 1, carries out primary bending. The openings of the V-shaped plates 32 are gradually reduced through multiple times of stamping and fine adjustment on the rear parts, specifically, the fine adjustment assembly comprises two groups of grouping blocks 34 which are arranged into two rows, a shaping block 35 is arranged on the inner side of each grouping block 34, one side, opposite to the shaping block 35, of each shaping block is an inclined plane or a vertical plane, the fine adjustment assembly is formed by the plurality of grouping blocks 34, the assembling convenience can be greatly improved, particularly, the die assembly is complex in structure and difficult to assemble when the whole die assembly is used, and when part of the whole die assembly is damaged, the single die assembly can be detached for replacement, so that the replacement cost is reduced. And through multiple adjustments, the sheet is finally punched into a tubular piece by performing straight punching.

And the final step is to carry out the edge rolling, and the end part of the workpiece of the pipe forming piece is edge rolled, specifically: as shown in fig. 10 and 11, the rounding mechanism 7 includes an arc-shaped loading position on the lower die 2 and a pinch roller mechanism 15 on the upper die 1, two driving blocks 16 are arranged on two sides of the arc-shaped loading position, and an embedded curved groove 17 is arranged on each driving block 16; the pressing wheel mechanism 15 comprises a mounting seat 18, the mounting seat 18 is connected to the upper die 1 through a sliding rail 19 in a sliding manner, a rotating shaft is connected to the mounting seat 18, a V-shaped wheel 20 is connected to the rotating shaft, guide wheels 21 are arranged at two ends of the rotating shaft, the V-shaped wheel 20 corresponds to the arc load position, the guide wheels 21 extend into the curve groove 17, it can be seen that the guide wheels 21 at two ends of the pressing wheel mechanism 15 on the upper die 1 are pressed into the curve groove 17 of the lower die 2, the guide wheels 21 at two ends of the rotating shaft move along the arc of the curve groove 17 through the radian of the curve groove 17, the vertical direction of the curve groove 17 is pressed downwards by the upper die 1, and the movement along the horizontal plane direction of the lower die 2 is realized through the sliding rail 19 connected with the mounting seat 18, namely the end of the workpiece pressed by the V-shaped wheel 20 is arc-shaped and gradually adjusted, and the final radian is, accuracy is improved and adjustability is enhanced.

Various modifications to the embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hollow tube pedal arm forming and rounding die is characterized by comprising an upper die, a lower die and a conveying arm positioned on the lower die, wherein a punching mechanism, a flanging mechanism, a bending mechanism and a rounding mechanism are sequentially arranged on the lower die, and the conveying arm is positioned on two sides of the lower die and used for conveying workpieces;

the bending mechanism comprises a V-shaped assembly, a fine adjustment assembly and a bending protruding part, wherein the V-shaped assembly is positioned on the lower die, and the bending protruding part is positioned on the upper die; the V-shaped assembly comprises a V-shaped plate, and positioning pins are arranged on two sides of the V-shaped plate; the fine adjustment assembly comprises two groups of grouping blocks which are arranged into two rows, wherein shaping blocks are arranged on the inner sides of the grouping blocks, and the opposite sides of the shaping blocks are inclined planes or vertical planes;

2. The hollow tube pedal arm forming and rolling die of claim 1, wherein the transmission arm comprises a first positioning rod and a second positioning rod which are parallel, and a grabbing rod is arranged on the first positioning rod and the second positioning rod; a plurality of first clamping jaws are arranged on the first positioning rod, and a first clamping jaw and a second clamping jaw are arranged on the second positioning rod.

3. The hollow tube pedal arm forming and rolling die of claim 2, wherein the first clamping jaw comprises a first clamping plate, a first pressing plate is arranged on the first clamping plate, and a gap is arranged between the first pressing plate and the first clamping plate.

4. The hollow tube pedal arm forming and rolling die of claim 3, wherein the second clamping jaw comprises a U-shaped bottom plate, a wedge-shaped surface is arranged at the bottom of the U-shaped bottom plate, and a second pressing sheet is arranged on the U-shaped bottom plate.

5. The hollow tube pedal arm molding and rolling die of claim 1, wherein the mounting block is slidably connected to the upper die by a slide rail.