CN221109596U - Forming mechanism of wide flat elastic sheet - Google Patents

Abstract

The utility model belongs to the field of spring piece processing, and relates to a forming mechanism of a wide and flat spring piece, which comprises a cutter holder, a forming block arranged on the cutter holder and a plurality of forming cutters distributed on the periphery of the forming block, wherein the forming cutters are driven by a forming driving device to squeeze flat wires in the direction of the forming block, and the flat wires are bent on a forming wall of the forming block; the tool apron is also provided with a correction tool for controlling the bending deflection of the wide flat elastic sheet, the front end of the blade part of the correction tool is provided with a notch which penetrates backwards and is matched with at least one molding wall of the molding block, and when the correction tool moves to the molding block in place, the notch clamps the molding block. The utility model avoids the phenomenon that the bending arm is deflected and the bending angle is inconsistent due to shaking deformation of the strip-shaped forming block.

Description

Forming mechanism of wide flat elastic sheet

Technical Field

The utility model belongs to the technical field of spring piece processing, and particularly relates to a forming mechanism of a wide and flat spring piece.

Background

The wide and flat spring sheet is generally processed by flat wire materials, and most of the width is between 4 and 10mm, and is commonly used for sensing elements, elastic supports, positioning devices, current conduction, flexible connection and the like in detection instruments, electric connectors or automatic devices. In the bending process of the wide flat elastic sheet, the length of the used forming block is longer due to the larger width, the slender forming block is easy to shake after being extruded from the direction of the forming knife in the bending process, deformation phenomenon is caused after long-term use, deflection of bending angles of the elastic sheet is caused, namely, the bending angles at the front end and the rear end are inconsistent, or differences occur among bending angles of different batches, the processing precision is insufficient, and the use requirement of a terminal product cannot be met.

This problem is especially prominent on the shell fragment that is the disconnection form in width direction, for example a wide flat shell fragment that the fig. 2, 3 show, wholly is similar U type structure, and this shell fragment finished product includes hem one 21, base 22 and hem two 23 that connect gradually, and the middle part of hem one 21 and hem two 23 is all broken and is formed two independent arm 24, and when bending the shaping, if the shaping piece appears rocking or deformation after being extruded, the inconsistent phenomenon appears in the dog-ear angle between two arm on same dog-ear (as shown in fig. 4) easily, perhaps the difference problem appears in the dog-ear angle between different batches.

Disclosure of utility model

Aiming at the problem that the bending angle is inconsistent in the existing processing process of the wide and flat elastic sheet, the utility model provides a forming mechanism of the wide and flat elastic sheet.

The forming mechanism of the wide flat elastic sheet comprises a cutter seat, a forming block arranged on the cutter seat and a plurality of forming cutters distributed on the periphery of the forming block, wherein the forming block is provided with a forming wall matched with the bending surface of the wide flat elastic sheet, and the forming cutter is driven by a forming driving device to squeeze flat wires towards the forming block so as to bend the flat wires on the forming wall; the shaping piece is rectangular shape, still install the correction sword that is used for avoiding shaping piece to rock and warp on the blade holder, the cutting part front end of correction sword be equipped with backward run through and with the notch of at least one shaping wall adaptation of shaping piece, when shaping sword with flat wire pole up extrude on the shaping sword, the notch of correction sword towards the direction chucking opposite to shaping sword shaping piece.

Preferably, when the correction knife moves to the forming block in place, the notch of the correction knife is clamped on the front side of the forming block.

Preferably, the rear side of the correction knife is provided with a hollow part which extends downwards to the blade part of the correction knife; the front end and the rear end of the wide flat elastic sheet positioned in the empty part are respectively close to the rear side wall of the correction knife and the knife holder.

Preferably, the correction knife is located above the forming block, and during blanking, the forming block is driven by the telescopic driving device to retract into the tool apron, and the forming knife and the correction knife are reset and far away from the wide flat elastic sheet.

Further, the front side and/or the rear side of the wide flat elastic sheet are/is provided with a folding lug which is bent downwards, the forming cutter comprises a first forming cutter capable of presetting the folding lug and a second forming cutter which is matched with the first forming cutter to bend to form a folding angle III of the wide flat elastic sheet, the edge part of the first forming cutter is provided with an extension wall which extends downwards, and the folding lug is contained in the inner side of the extension wall.

Preferably, the forming knife further comprises a third forming knife and a fifth forming knife which are respectively bent to form a first bending angle and a second bending angle of the wide flat elastic sheet, and a fourth forming knife which is used for extruding the flat wire to the bottom of the forming block.

Further, a cutting assembly is further arranged on the tool apron and used for cutting the continuous flat wire before bending, the cutting assembly comprises a female die insert, a fixed block, a cutting male die and a cutting driving device, the fixed block is arranged on the tool apron, and the female die insert is fixed on the fixed block; the cutting male die is driven by a cutting driving device to penetrate through the female die insert, and the plate wire on the female die insert is cut off.

Preferably, the die insert is flush with the surface of the fixed block.

Preferably, a discharging cavity communicated with a die hole on the die insert is arranged in the fixing block, and the discharging cavity penetrates through the fixing block downwards.

Preferably, the cutting assembly further comprises a first positioning block for positioning the cutting male die, a second positioning block opposite to the first positioning block is fixed on the tool apron, and the correction tool is located between the first positioning block and the second positioning block and can move along the first positioning block and the second positioning block.

Preferably, the rear side of the second positioning block is provided with a hollowed-out part, the first forming cutter is positioned in the hollowed-out part, and the left side and the right side of the first forming cutter are respectively positioned by the left side wall of the hollowed-out part and the correction cutter.

The beneficial effects of the utility model are as follows:

According to the utility model, the correction knife is arranged on the knife holder, and the front end of the blade part of the correction knife is provided with the notch which penetrates backwards and is matched with the forming wall of the forming block, so that when the forming knife extrudes the flat wire on the forming block, the correction knife can clamp the forming block, the strip-shaped forming block is prevented from shaking or deforming, and the consistency of the bending angle of the wide and flat elastic sheet is ensured.

The rear side of the correction knife is provided with a blank part which extends downwards to the edge part of the correction knife; after the correction knife moves to the forming block in place, the notch locks the forming block, the front end and the rear end of the wide flat elastic sheet in the empty part are respectively close to the rear side wall of the correction knife and the knife holder, so that two folding arms on the same folding edge can be perpendicular to the plane where the knife holder is located, the phenomena of deflection of the folding arms and inconsistent folding angles are further avoided, and the processing quality of products is guaranteed.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:

fig. 1 is a schematic plan view of a flat wire before bending;

FIG. 2 is a front view of the wide flat spring after bending;

FIG. 3 is a right side view of the wide flat spring after bending;

FIG. 4 is a schematic view showing a slight deflection of a folding arm of a second folding edge of the wide flat spring sheet;

FIG. 5 is a schematic diagram of the front view of the forming mechanism of the present utility model;

FIG. 6 is a schematic diagram of a molding block structure of the present utility model;

FIG. 7 is a schematic diagram of the fit between the wide flat spring and the forming block, forming knife and correcting knife of the present utility model;

FIG. 8 is a schematic diagram illustrating the formation of a bending portion of a wide flat spring plate according to the present utility model;

fig. 9 is a perspective view of a first forming blade according to the present utility model;

Fig. 10 is a front view of a first forming knife of the present utility model;

FIG. 11 is a bottom view of the first forming blade of the present utility model;

FIG. 12 is a schematic view of the severing assembly of the present utility model;

FIG. 13 is a schematic view of a fixed block structure of the present utility model;

FIG. 14 is a schematic view of the matching structure between the first and second positioning blocks and the first and correction blades;

fig. 15 is a schematic diagram of the spring forming process according to the present utility model.

1. A flat wire before bending; 2. a wide flat spring plate; 21. folding the first edge; 22. a bottom edge; 23. folding the second edge; 24. folding arms; 25. a first folding angle; 26. a second folding angle; 27. a folding angle III; 28. folding the lugs; 3. a tool apron; 4. molding blocks; 41. forming a first wall; 42. forming a second wall; 43. a bottom wall III; 51. a first forming knife; 511. an extension arm; 512. molding surface; 52. a second forming knife; 53. a third forming knife; 54. a fourth forming blade; 55. a fifth forming knife; 61. correcting the knife; 611. a blade section; 612. a void portion; 613. correcting the surface; 614. a notch; 62. correction driving means; 7. cutting off the assembly; 71. a female die insert; 72. a fixed block; 721. a discharge cavity; 73. cutting off the male die; 74. cutting off the driving device; 75. a positioning needle; 8. a first positioning block; 9. and a second positioning block.

Detailed Description

Example 1

The present embodiment provides a forming mechanism for a wide flat spring sheet, which is used for forming the spring sheet shown in fig. 2 and 3 by using a flat wire, and the shape of the flat wire 1 before bending is shown in fig. 1.

As shown in fig. 5 and 6, the forming mechanism includes a tool post 3, a forming block 4 is mounted on the tool post 3, the left and right sides of the forming block 4 are respectively provided with a forming wall adapted to the bending surface of the elastic sheet, specifically a forming wall one 41 for forming a first folding edge 21 and a forming wall two 42 for forming a second folding edge 23, and the bottom of the forming block 4 is further provided with a bottom wall three 43 for abutting against the elastic sheet and forming a bottom edge 22 of the elastic sheet.

Referring to fig. 5 and 6, a plurality of driving devices are further mounted on the base, a plurality of forming knives are distributed on the periphery of the forming block 4, the forming knives are mounted on the driving devices, the forming driving devices drive the forming blocks 4 to squeeze the flat wire, and the flat wire is bent on the forming wall. The driving device is a linear driving device which is commonly used, such as a linear servo motor, an air cylinder, a hydraulic cylinder and the like. Specifically, the forming knife comprises a third forming knife 53, a fourth forming knife 54 and a fifth forming knife 55, the fifth forming knife 55 firstly horizontally presses the flat wire on the bottom of the forming block 4, the third forming knife 53 and the fifth forming knife 55 are matched and bent to form a first bending angle 25 of the wide and flat elastic sheet, and the fourth forming knife 54 and the fifth forming knife 55 are matched and bent to form a second bending angle 26 of the wide and flat elastic sheet.

Referring to fig. 5 and 7, a correction knife 61 is further mounted on the tool holder 3, the correction knife 61 is a columnar structure with a rectangular cross section, and a blade 611 is provided at the lower end of the correction knife 61 for locking the molding block 4, so as to avoid shaking or deformation of the molding block when the molding block is extruded, and ensure consistency of bending angles of the elastic sheets.

Referring to fig. 7 and 8, the front end of the blade 611 of the correction blade 61 is provided with a slot 614 penetrating backward and adapted to the molding wall of the molding block 4, and when the molding blade (i.e. the third molding blade and/or the fifth molding blade) presses the flat wire upward onto the molding blade, the slot of the correction blade clamps the molding block in a direction opposite to the molding blade, where "direction opposite to the molding blade" means that the direction of the component force of the compression force of the correction blade to the molding block is opposite to the direction of at least one component force of the compression force of the molding blade to the molding block.

In one embodiment, the notch 614 is adapted to both the first forming wall 41 and the second forming wall 42. When the correction blade 61 moves to the forming block 4, the notch 614 blocks the front side of the forming block 4, and the correction blade locks the front side of the forming block 4 because the front side of the forming block 4 is a suspended free end, so that the forming block can work more stably.

Specifically, referring to fig. 5, the correction blade 61 is located above the forming block and is driven by the correction driving device 62 on the tool apron 3 to move up and down, the third forming blade and the fifth forming blade are respectively located at the left lower part and the right lower part of the forming block, and the fourth forming blade is located directly below the forming block, so that the correction blade can apply a pressure opposite to the third forming blade, the fourth forming blade and the fifth forming blade to the forming block, thereby avoiding the forming block from shaking and improving the working reliability of the forming block.

The rear side of the correcting knife 61 is provided with a hollow part 612 which extends downwards to the blade part 611 of the correcting knife 61, the first folding edge 21 and the second folding edge 23 can extend into the hollow part 612, the rear side wall of the correcting knife 61 (namely the front side of the hollow part 612) is a correcting surface 613, when the elastic sheet is bent and molded, the front sides of the first folding edge 21 and the second folding edge 23 are both moved close to the correcting surface 613, and the rear sides are both moved close to the tool apron 3, so that the two folding arms 24 are kept vertical to the tool apron 3 and the correcting surface 613, the folding angles of the two folding arms on the same folding edge are consistent, and the phenomenon of bending deflection difference is further improved.

The knife rest 3 is also provided with a telescopic driving device (not shown) connected with the forming block 4, and when blanking is carried out, the forming block 4 is driven by the telescopic driving device to retract into the knife rest 3, the forming knife and the correction knife 61 are reset and far away from the wide flat elastic sheet, and the wide flat elastic sheet automatically falls off after being separated from the forming block 4. The correction driving device 62 and the telescopic driving device are known as linear driving devices.

Example 2

The left end of the wide flat elastic sheet according to this embodiment is further provided with a Z-shaped bending portion, a corner three 27 is formed on the bending portion, at least one of the front side and the rear side of the bending portion is provided with a bending ear 28 bent downward, please refer to fig. 8, the forming knife further includes a first forming knife 51 and a second forming knife 52 for forming the corner three 27 in a matching manner on the basis of embodiment 1, and the front ends of the first forming knife 51 and the second forming knife 52 are provided with forming surfaces 512 adapted to the bending portion. Referring to fig. 8 to 11, the first forming knife 51 is located above the wide flat spring, the second forming knife 52 is located below the wide flat spring, the first forming knife 51 may also be pre-positioned to the lug 28, the edge of the first forming knife 51 is provided with an extending wall extending downward, the lug 28 is received inside the extending wall, and the second forming knife 52 extends into the inner side of the lug 28.

Other structures of this embodiment are the same as those of embodiment 1.

Referring to fig. 5 and 15, the working procedure of the present embodiment is as follows:

After the preformed flat wire horizontally moves to the left along the bottom wall III 43 of the forming block 4, the correction knife 61 stretches out and is clung to the upper part of the forming block, and the fourth forming knife 54 stretches out to press the flat wire on the bottom wall III 43 of the forming block 4;

The first forming knife 51 and the second forming knife 52 extend out and are bent to form a folding angle III 27 on the left side of the wide flat elastic sheet; the folding lug 28 is accommodated in the inner side of the extension wall, and when the folding lug has a slight deflection trend, the extension wall guides the folding lug to a certain extent, so that the deflection is avoided, the bending precision of the flat wire is ensured, and the quality consistency of the bending angles of the first folding edge 21 and the second folding edge 23 is further improved;

The fifth forming knife 55 extends out, the second folding edge 23 on the right side of the wide flat elastic sheet is formed in a bending mode, the second folding edge 23 is contained in the empty part of the correcting knife, and folding angles on the front side and the rear side are kept consistent; the first forming knife 51 and the second forming knife 52 are retracted and reset;

The third forming knife 53 stretches out, the first folding edge 21 of the wide and flat elastic sheet is formed in a bending mode, the first folding edge 21 is contained in the empty part of the correcting knife, and folding angles on the front side and the rear side are kept consistent;

At this time, the wide flat elastic sheet 2 is bent and formed, the correction knife and each forming knife are retracted and reset, the telescopic driving device drives the forming block 4 to retract and reset, and the wide flat elastic sheet falls from the knife holder 3 freely.

Example 3

In this embodiment, on the basis of embodiment 1, a cutting assembly 7 for cutting the continuous flat wire before bending is further mounted on the blade holder 3.

Referring to fig. 5 and 12 to 14, the cutting assembly 7 includes a die insert 71, a fixing block 72, a cutting punch 73 and a cutting driving device 74, the fixing block 72 is mounted on the tool apron 3, the die insert 71 is embedded and fixed on the fixing block 72 by a screw, so that the worn die insert 71 is convenient to replace, and a die hole is formed in the die insert 71; a cutting drive device 74 is also attached to the tool holder 3, and the cutting punch 73 is driven by the cutting drive device 74 to pass through the die hole of the die insert 71, thereby cutting the plate wire on the die insert 71.

The die insert 71 is flush with the surface of the fixed block 72, so that the flat wire can smoothly translate along the fixed block 72 and the die insert 71.

Referring to fig. 13, a discharge cavity 721 communicating with a die hole in the die insert 71 is provided in the fixed block 72, the discharge cavity 721 obliquely penetrates the fixed block 72 downward, and the cut flat wire scrap is discharged through the discharge cavity 721.

The flat wire is preformed with a positioning hole, the cutting assembly 7 further comprises at least one positioning needle 75 for positioning the flat wire, the positioning needle 75 is also arranged on the cutting driving device 74, and when the cutting driving device 74 drives the cutting male die 73 to move downwards, the positioning needle 75 is inserted into the positioning hole to accurately determine that the flat wire is positioned on the fixed block 72.

Referring to fig. 14, the cutting assembly 7 further includes a first positioning block 8 for positioning the cutting punch 73, a second positioning block 9 spaced apart from the first positioning block 8 is fixed on the tool holder 3, the correction tool 61 is positioned between the first positioning block 8 and the second positioning block 9, and the correction tool 61 can move up and down along the first positioning block 8 and the second positioning block 9.

The rear side of the positioning block II 9 is provided with a hollowed part, the first forming cutter 51 is positioned in the hollowed part, and the left side wall of the hollowed part and the correction cutter 61 are respectively clung to the left side wall of the hollowed part and the right side of the first forming cutter 51 to move up and down, so that the correction cutter 61 is positioned by the positioning block I8 and the positioning block II 9, and can also be matched with the positioning block II 9 to provide a positioning effect for the first forming cutter 51.

Before the flat wire is required to be cut, the continuous preformed flat wire is conveyed to the fixed block 72 and the die insert 71, the cutting driving device 74 drives the cutting male die 73 and the positioning needle 75 to move downwards, the positioning needle 75 is inserted into the positioning hole, the flat wire is positioned, the cutting male die 73 and the die insert 71 are matched to punch the flat wire, the leftmost prefabricated product is cut and separated from the continuous flat wire, and the leftmost prefabricated product is clung to the bottom of the forming block 4.

Example 4

In this embodiment, on the basis of embodiment 2, a cutting assembly 7 for cutting the continuous flat wire before bending is further mounted on the blade holder 3.

The structure of the cutting assembly in this embodiment is the same as that of the cutting assembly in embodiment 3, and will not be described again.

The foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. 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. The forming mechanism of the wide flat elastic sheet comprises a cutter seat, a forming block arranged on the cutter seat and a plurality of forming cutters distributed on the periphery of the forming block, wherein the forming block is provided with a forming wall matched with the bending surface of the wide flat elastic sheet, and the forming cutter is driven by a forming driving device to squeeze flat wires towards the forming block so as to bend the flat wires on the forming wall; the shaping block is of a strip shape, a correction knife used for preventing the shaping block from shaking and deforming is further arranged on the knife holder, a notch which penetrates backwards and is matched with at least one shaping wall of the shaping block is formed in the edge part of the correction knife, and when the shaping knife extrudes flat wires onto the shaping knife, the notch of the correction knife is clamped with the shaping block in a direction opposite to the shaping knife.

2. The mechanism for forming a wide and flat spring according to claim 1, wherein the notch of the correcting blade is clamped on the front side of the forming block when the correcting blade moves to the forming block.

3. The forming mechanism of the wide and flat elastic sheet according to claim 1, wherein a hollow part extending downwards to the blade part of the correcting knife is arranged at the rear side of the correcting knife; the front end and the rear end of the wide flat elastic sheet positioned in the empty part are respectively close to the rear side wall of the correction knife and the knife holder.

4. A mechanism for forming a wide and flat elastic sheet according to any one of claims 1 to 3, wherein the correction knife is located above the forming block, and when blanking, the forming block is driven by the telescopic driving device to retract into the tool apron, and the forming knife and the correction knife are both reset and far away from the wide and flat elastic sheet.

5. The molding mechanism of claim 4, wherein,

The front side and/or the rear side of the wide flat elastic sheet are/is provided with a folding lug which is bent downwards, the forming cutter comprises a first forming cutter capable of pre-positioning the folding lug and a second forming cutter which is matched with the first forming cutter to be bent to form a folding angle III of the wide flat elastic sheet, the edge part of the first forming cutter is provided with an extension wall which extends downwards, and the folding lug is accommodated in the inner side of the extension wall;

The forming cutter further comprises a third forming cutter and a fifth forming cutter which are respectively bent to form a first folding angle and a second folding angle of the wide flat elastic sheet, and a fourth forming cutter which is used for extruding the flat wire material to the bottom of the forming block.

6. The mechanism for forming a wide flat spring according to claim 5, wherein: the cutting assembly is used for cutting the continuous flat wire before bending and comprises a female die insert, a fixed block, a cutting male die and a cutting driving device, wherein the fixed block is arranged on the tool apron, and the female die insert is fixed on the fixed block; the cutting male die is driven by a cutting driving device to penetrate through the female die insert, and the plate wire on the female die insert is cut off.

7. The mechanism for forming a wide flat spring according to claim 6, wherein: the die insert is flush with the surface of the fixed block.

8. The mechanism for forming a wide flat spring according to claim 6, wherein: the die is characterized in that a discharging cavity communicated with a die hole on the die insert is arranged in the fixing block, and the discharging cavity penetrates through the fixing block downwards.

9. The mechanism for forming a wide flat spring according to claim 6, wherein: the cutting assembly further comprises a first positioning block used for positioning the cutting male die, a second positioning block opposite to the first positioning block is fixed on the tool apron, and the correcting tool is positioned between the first positioning block and the second positioning block and can move along the first positioning block and the second positioning block.

10. The mechanism for forming a wide flat spring according to claim 9, wherein: the rear side of the second positioning block is provided with a hollowed-out part, the first forming cutter is positioned in the hollowed-out part, and the left side and the right side of the first forming cutter are respectively positioned by the left side wall of the hollowed-out part and the correction cutter.