A split punching head and plate edge groove punching and cutting mechanism

Abstract

This invention discloses a split-type stamping head and a sheet metal edge groove stamping and cutting mechanism, belonging to the field of sheet metal stamping technology. The stamping head includes: a connecting part on the upper side of a punch block; a front cutting component fixed to the front side of the punch block; an inclined cutting blade on the lower side of the front cutting component; and left and right cutting components symmetrically fixed to the two sides of the punch block. The left cutting component includes a horizontal plate and a vertical plate attached to the side of the punch block, with their ends intersecting to form an edge; a groove is formed in the middle of the edge, where the cutting blades of the horizontal and vertical plates intersect; a cutting block is fixed in the groove. The split-type stamping head of this invention allows the stamping process to simultaneously complete cutting and grooving actions from multiple directions, ensuring the shape and dimensional accuracy of the edge groove. In particular, the design of the cutting block within the groove in the left and right cutting components effectively improves the stamping accuracy at the corner of the groove, allowing the bent body panel to better meet the requirement of a tight fit with the frame pillar.

Description

Technical Field

[0001] The invention relates to the technical field of plate punching, and in particular to a split punching head and a plate edge groove punching and cutting mechanism, which are used for punching out a notch at the edge of a plate. Background Art

[0002] The edge of the electric vehicle's body panel needs to be notched before bending; when installing the body panel, the notch fits in with the vertical column on the frame to position the body panel, making it better suited to the use environment and load requirements of the electric vehicle. With the rapid development of the electric vehicle industry, higher requirements are placed on the manufacturing accuracy and installation convenience of electric vehicle body panels.

[0003] In the production process of traditional electric vehicle body panels, the notching operation before the edge bending is often performed with a single stamping die, and the sheet is directly punched with a punch. The sheet processed in this way is difficult to ensure the accuracy and consistency of the notch, especially at the notch corners, where there are many burrs and easy deformation, resulting in the body panel not fitting tightly with the frame column during installation, which in turn affects the overall stability and load-bearing performance of the body. Summary of the invention

[0004] In view of the above-mentioned technical deficiencies, the present invention provides a split punching head and a plate edge groove punching and cutting mechanism.

[0005] The present invention adopts the following technical solution: a split punch head, comprising:

[0006] A punch block, wherein a connecting portion is provided on the upper side of the punch block;

[0007] A front cutting piece is fixed on the front side of the punch block; an inclined cutting blade is provided on the lower side of the front cutting piece;

[0008] The left cutting piece and the right cutting piece are symmetrically fixed on two sides of the punch block;

[0009] Among them, the left cutting piece includes a horizontal plate attached to the front side of the punch block and a vertical plate attached to the left side of the punch block, the ends of the horizontal plate and the vertical plate intersect to form an edge; a groove is provided at the lower end of the edge, and inclined cutting blades are provided on the lower sides of the horizontal plate and the vertical plate, and the cutting blades of the horizontal plate and the vertical plate intersect at the groove; a cutting block is fixed in the groove.

[0010] Furthermore, the lower end of the front cutting piece has a cutting edge extending to both sides, and the lower side of the cutting edge is provided with two symmetrical cutting blades.

[0011] The horizontal plate of the left cutting piece is attached to the upper side of the cutting edge, and a horizontal long hole is opened on the horizontal plate, and the long hole of the horizontal plate is fixed to the punch block by screws; the vertical plate is opened with a light hole, and the light hole of the vertical plate is fixed to the punch block by screws.

[0012] A plate edge groove punching and cutting mechanism, comprising:

[0013] Pedestal;

[0014] A lower fixed mold, fixed on the base;

[0015] The upper movable die is located above the lower fixed die and is vertically slidably mounted on the base; an elastic member for pushing the upper movable die toward the lower fixed die is provided between the upper movable die and the base; and a punch head is vertically slidably mounted in the upper movable die;

[0016] A driving device is connected to the upper movable die and the punch head; the driving device is used to bidirectionally drive the punch head to move up and down along the upper movable die, and the driving device is used to unidirectionally drive the upper movable die to move upward along the base.

[0017] It is further provided that: the base comprises a base plate and a beam plate arranged in parallel above the base plate, the base plate and two sides of the beam plate are fixedly connected by side plates, and a reinforcing plate is fixed between the rear side of the side plate and the base plate and the beam plate;

[0018] The front side of the side plate is provided with a long groove for placing the side edge of the plate;

[0019] The reinforcing plate is threadedly connected with an adjusting bolt for abutting against the side edge of the plate.

[0020] The lower fixed mold is embedded in the positioning groove on the base plate, and the lower fixed mold and the base plate are respectively provided with upper and lower opposite punching holes; the pressing block is pressed on the edges on both sides of the lower fixed mold, and the pressing block is fixed on the base plate by connecting bolts.

[0021] A sink groove opposite to the punching hole on the lower fixed die is provided on the lower side of the upper movable die, and a weight-reducing hole connected to the sink groove is provided around the upper movable die; the punch head is slidably installed in the sink groove of the upper movable die.

[0022] Four rectangularly distributed guide columns are fixed on the upper side of the upper movable mold, and four rectangularly distributed guide sleeves are fixed on the lower side of the beam plate. The guide columns are slidably connected with the guide sleeves in a one-to-one correspondence; the elastic member is a spring sleeved outside the guide sleeve, and the two ends of the spring are respectively against the upper side of the upper movable mold and the lower side of the beam plate.

[0023] The driving device includes an oil cylinder, a cylinder body of the oil cylinder is fixed to the beam plate through a flange plate, a piston rod of the oil cylinder passes through the upper movable die and is fixedly connected to the connecting part of the punch head; a shaft retaining ring is installed on the piston rod, and the shaft retaining ring is against the lower side of the upper movable die.

[0024] The beneficial effects of the present invention are:

[0025] The split punching head enables the punching process to complete cutting and notching actions from multiple directions at the same time, ensuring the shape and size accuracy of the edge groove; in particular, the inclined cutting blades on the front cutting piece and the left and right cutting pieces, as well as the cutting block design in the notch of the left and right cutting pieces, can effectively improve the punching accuracy of the notch corners. The bent car body does not need to grind the notch again, which can meet the needs of close fit with the frame column.

[0026] The modular design of the split punch head can adapt to different shapes and sizes of side grooves. By replacing different upper and lower dies and adjusting the angle and position of the cutting piece or cutting blade, it can meet the processing needs of carriage panels of different specifications.

[0027] The addition of a secondary guided upper movable die in the stamping and cutting mechanism improves the punching accuracy of the punch head; before the punch head contacts the sheet, the upper movable die and the lower fixed die can first press the sheet to ensure the position accuracy of the sheet during the stamping process; before the punch head returns and leaves the sheet, the upper movable die and the lower fixed die are still in the state of pressing the sheet, which can prevent the problem of deformation of the sheet notch when the punch head returns. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 The figure is a three-dimensional diagram of a split punching head of the present invention.

[0030] Figure 2 This is a front view of a split punching head of the present invention.

[0031] Figure 3 The exploded view of a split punch head of the present invention.

[0032] Figure 4 The present invention is a three-dimensional diagram of a plate edge groove punching and cutting mechanism.

[0033] Figure 5 The present invention is a front view of a plate edge groove punching and cutting mechanism.

[0034] Figure 6 for Figure 5 Enlarged view of point A in the middle.

[0035] Figure 7 The figure is a left side view of a plate edge groove punching and cutting mechanism of the present invention.

[0036] Figure 8The present invention is a schematic diagram of the working of a plate edge groove punching and cutting mechanism.

[0037] Fig. 9 for Figure 8 Middle BB view.

[0038] Description of reference numerals:

[0039] 1. Punching head; 11. Punching block; 12. Front cutting piece; 121. Cutting edge; 13. Left cutting piece; 131. Horizontal plate; 132. Edge; 133. Vertical plate; 134. Notch; 135. Cutting block; 14. Right cutting piece;

[0040] 2. Base; 21. Base plate; 22. Beam plate; 23. Side plate; 231. Long groove; 24. Reinforcement plate; 25. Adjustment bolt;

[0041] 3. Lower fixed die; 31. Press block; 32. Connecting bolts;

[0042] 4. upper movable mold; 41. guide column; 42. guide sleeve; 43. spring;

[0043] 5. Driving device; 51. Cylinder; 52. Piston rod; 53. Flange plate; 54. Retaining ring for shaft. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] Embodiment 1:

[0046] like Figures 1 to 3 As shown, the present invention provides a split punching head, which mainly includes a punch block 11 and a front cutting piece 12, a left cutting piece 13 and a right cutting piece 14 fixed on three peripheral surfaces of the punch block 11. The punch block 11 is a rectangular block, and a threaded hole is opened at the center of the upper side of the punch block 11 for connecting with the punching and cutting mechanism.

[0047] The front cutting piece 12 is fixed to the front side of the punch block 11 by screws. The lower end of the front cutting piece 12 has a cutting edge 121 extending to both sides, so that the front cutting piece 12 is an inverted "T"-shaped structure as a whole. The lower side of the cutting edge 121 is provided with two symmetrical cutting edges, and the two cutting edges are arranged in a manner of being low in the middle and high on both sides, such as Figure 2 as shown in .

[0048] The left cutting piece 13 and the right cutting piece 14 are fixed on the two sides of the punch block 11 in a symmetrical manner. In this embodiment, the left cutting piece 13 is used as an example for explanation:

[0049] The left cutting piece 13 includes a transverse plate 131 and a longitudinal plate 133 which are perpendicular to each other. The left cutting piece 13 is in an "L"-shaped structure as a whole. The transverse plate 131 is attached to the front side of the punch block 11, and the longitudinal plate 133 is attached to the left side of the punch block 11. The ends of the transverse plate 131 and the longitudinal plate 133 intersect to form an edge 132. The lower sides of the transverse plate 131 and the longitudinal plate 133 are provided with inclined cutting edges, and the edge 132 is provided with a notch 134. The cutting edges of the transverse plate 131 and the longitudinal plate 133 intersect at the notch 134. The two cutting edges are arranged in a manner of being high in the middle and low on both sides, such as Figure 1 and Figure 3 As shown in the figure, the rear end of the longitudinal plate 133 is at the lowest position, and this lowest position does not participate in the punching process. The two corners at the front lower position of the punch block 11 are cut off to avoid interference with the cutting edge. The cutting block 135 is fixed in the notch 134, and the lowest position of the cutting block 135 is slightly higher than the lowest position of the notch 134. A protruding tip is set at the outer edge of the cutting block 135.

[0050] The horizontal plate 131 of the left cutting piece 13 is provided with a horizontal long hole, which is fixed to the punch block 11 by screws; the lower side of the horizontal plate 131 is attached to the upper side of the cutting edge 121, and the left cutting piece 13 can be adjusted left and right through the design of the long hole. The vertical plate 133 is provided with a plurality of light holes, which are fixed to the punch block 11 by screws; in specific use, a pad can be set between the vertical plate 133 and the punch block 11 to adjust the left and right position of the left cutting piece 13 to adapt to the punching of notches of different lengths.

[0051] During the punching process of the sheet by the punch head, the cutting blades in each cutting piece first contact the sheet, and the inclined cutting blades can gradually cut the sheet to form a smooth groove edge; after the cutting blades pass over the sheet, the cutting blocks 135 on both sides begin to punch out the corners of the sheet groove. At this time, most of the sheet has been punched out, and the punch head is subject to less resistance. The cutting block 135 can quickly punch out the last corner position to ensure the accuracy of the groove corner position.

[0052] Embodiment 2:

[0053] Based on the above embodiment 1, Figures 4 to 7 As shown, the present invention provides a plate edge groove punching and cutting mechanism, which mainly includes a base 2, a lower fixed die 3, an upper movable die 4 and a driving device 5.

[0054] The base 2 includes a base plate 21 and a beam plate 22 arranged in parallel above the base plate 21. The base plate 21 and the beam plate 22 are connected by welding on both sides through side plates 23. The base 2 is a square frame structure as a whole. A reinforcing plate 24 is welded and fixed between the rear side of the side plate 23 and the base plate 21 and the beam plate 22 to enhance the overall structural strength of the base 2. A relatively open long groove 231 is provided on the front side of the side plate 23. When working, the side edge of the plate is placed in the long groove 231. The adjusting bolt 25 is connected to the reinforcing plate 24 by threading, and the inner end of the adjusting bolt 25 is against the side edge of the plate. By controlling the extension length of the adjusting bolt 25, the width of the notch expected to be punched on the side edge of the plate can be adjusted.

[0055] The base plate 21 is provided with a positioning groove, and the lower fixed die 3 is embedded in the positioning groove on the base plate 21 to realize the positioning of the lower fixed die 3. The lower fixed die 3 and the base plate 21 are respectively provided with punching holes facing each other up and down, and the waste materials after punching can fall from the punching holes on the base plate 21. The lower fixed die 3 has edges extending outward on both sides, and the pressing blocks 31 on both sides are pressed on the edges of the lower fixed die 3. The pressing blocks 31 are fixed to the base plate 21 by connecting bolts 32, thereby locking the lower fixed die 3.

[0056] Combination Figure 5 and Figure 6 As shown, the upper movable mold 4 is opposite to the lower fixed mold 3, and four rectangular guide posts 41 are fixed on the upper side of the upper movable mold 4. Four rectangular threaded holes are provided on the lower side of the beam plate 22, which are opposite to the guide posts 41 one by one. The upper end of the guide sleeve 42 is installed in the threaded hole by threaded connection, and the guide posts 41 and the guide sleeve 42 are slidably connected one by one. The spring 43 is sleeved on the outer side of the guide post 41 and the guide sleeve 42, and the two ends of the spring 43 are respectively against the upper side of the upper movable mold 4 and the lower side of the beam plate 22. The spring 43 gives a downward thrust to the upper movable mold 4, so that the upper movable mold 4 can be pressed against the lower fixed mold 3.

[0057] An open sink groove is provided on the lower side of the upper movable die 4, and the sink groove is opposite to the punching hole on the lower fixed die 3. A weight-reducing hole connected to the sink groove is provided around the upper movable die 4. The punch head 1 is slidably installed in the sink groove of the upper movable die 4, and the front cutting piece 12, the left cutting piece 13 and the right cutting piece 14 in the punch head 1 are in contact with the inner wall of the sink groove of the upper movable die 4, so as to guide the punch head 1 to move up and down.

[0058] The driving device 5 includes an oil cylinder 51, and the cylinder body of the oil cylinder 51 is fixed on the beam plate 22 through a flange plate 53. The oil cylinder 51 is arranged vertically downward, and the piston rod 52 passes through the beam plate 22 and the top plate of the upper movable mold 4. The end of the piston rod 52 is connected to the threaded hole on the upper side of the punch block 11 through a thread, and the shaft retaining ring 54 is installed on the piston rod 52 and abuts against the lower side of the top plate of the upper movable mold 4. The oil cylinder 51 can drive the punch head 1 to move up and down along the upper movable mold 4 in both directions, and can drive the upper movable mold 4 to move upward along the base 2 in one direction.

[0059] Working principle:

[0060] Combination Figures 4 to 9 As shown, the side of the plate is placed in the elongated groove 231, and the position of the side of the plate to be punched is located between the lower fixed die 3 and the upper movable die 4;

[0061] In the first stage, the oil cylinder 51 gradually extends, and under the thrust of the spring 43, the upper movable die 4 moves down and presses against the side of the plate to achieve plate positioning, and the rear ends of the longitudinal plates 133 of the left cutting piece 13 and the right cutting piece 14 slightly enter the lower fixed die 3, providing better guidance for the subsequent blanking process, such as Figure 8 and Fig. 9 As shown;

[0062] In the second stage, the oil cylinder 51 is extended at an accelerated speed, and the cutting blades in each cutting piece begin to punch the sheet until the punching is completed. At this time, the upper edges of the left cutting piece 13, the right cutting piece 14 and the front cutting piece 12 do not separate from the upper movable die 4;

[0063] In the third stage, the oil cylinder 51 begins to retract, and the punch head 1 rises and leaves the lower fixed die 3 and the plate. During this process, the upper movable die 4 is still in a state of pressing the plate.

[0064] In the fourth stage, the oil cylinder 51 continues to retract, and the shaft on the piston rod 52 uses a retaining ring 54 to abut against the upper movable mold 4, and begins to drive the upper movable mold 4 to compress the spring 43, so that the upper movable mold 4 moves upward to the initial position.

[0065] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A split punch head, characterized in that: include: A punch block (11), wherein a connecting portion is provided on the upper side of the punch block (11); A front cutting piece (12) is fixed to the front side of the punch block (11); an inclined cutting blade is provided on the lower side of the front cutting piece (12); A left cutting piece (13) and a right cutting piece (14) are symmetrically fixed on two side surfaces of the punch block (11); The left cutting piece (13) comprises a transverse plate (131) attached to the front side of the punch block (11) and a longitudinal plate (133) attached to the left side of the punch block (11); the ends of the transverse plate (131) and the longitudinal plate (133) intersect to form an edge portion (132); a notch (134) is provided at the lower end of the edge portion (132); inclined cutting edges are provided at the lower sides of the transverse plate (131) and the longitudinal plate (133); the cutting edges of the transverse plate (131) and the longitudinal plate (133) are arranged in a manner of being higher in the middle and lower at both sides; the cutting edges of the transverse plate (131) and the longitudinal plate (133) intersect at the notch (134); a cutting block (135) is fixed in the notch (134); the lowest position of the cutting block (135) is slightly higher than the lowest position of the notch (134); a protruding tip is provided at the outer edge of the cutting block (135); The lower end of the front cutting piece (12) has a cutting edge (121) extending to both sides, and the lower side of the cutting edge (121) is provided with two symmetrical cutting blades; The horizontal plate (131) of the left cutting piece (13) is attached to the upper side of the cutting edge (121), and a horizontal long hole is opened on the horizontal plate (131). The long hole of the horizontal plate (131) is fixed to the punch (11) by screws; the vertical plate (133) is opened with a light hole, and the light hole of the vertical plate (133) is fixed to the punch (11) by screws.

2. A plate edge groove punching and cutting mechanism, using a split punching head as claimed in claim 1, characterized in that: include: Base (2); A lower fixed mold (3) fixed on the base (2); An upper movable die (4) is located above the lower fixed die (3) and is vertically slidably mounted on the base (2); an elastic member for pushing the upper movable die (4) toward the lower fixed die (3) is provided between the upper movable die (4) and the base (2); a punch head (1) is vertically slidably mounted in the upper movable die (4); A driving device (5) is connected to the upper movable die (4) and the punch head (1); the driving device (5) is used to bidirectionally drive the punch head (1) to move up and down along the upper movable die (4), and the driving device (5) is used to unidirectionally drive the upper movable die (4) to move upward along the base (2).

3. A plate edge groove punching and cutting mechanism according to claim 2, characterized in that: The base (2) comprises a base plate (21) and a beam plate (22) arranged in parallel above the base plate (21); the base plate (21) and the beam plate (22) are fixedly connected at both sides via side plates (23); a reinforcing plate (24) is fixed between the rear side of the side plate (23) and the base plate (21) and the beam plate (22); The front side of the side plate (23) is provided with a long groove (231) for placing the side edge of the plate; The reinforcing plate (24) is threadedly connected with an adjusting bolt (25) for abutting against the side edge of the plate.

4. A plate edge groove punching and cutting mechanism according to claim 3, characterized in that: The lower fixed die (3) is embedded in a positioning groove on the base plate (21); the lower fixed die (3) and the base plate (21) are respectively provided with upper and lower opposite punching holes; a pressing block (31) is pressed on the edges of both sides of the lower fixed die (3); the pressing block (31) is fixed to the base plate (21) by connecting bolts (32).

5. The plate edge groove punching and cutting mechanism according to claim 3, characterized in that: A sink groove opposite to the punch hole on the lower fixed die (3) is provided on the lower side of the upper movable die (4), and a weight-reducing hole communicating with the sink groove is provided around the upper movable die (4); the punch head (1) is slidably mounted in the sink groove of the upper movable die (4).

6. A plate edge groove punching and cutting mechanism according to claim 5, characterized in that: Four rectangularly distributed guide posts (41) are fixed on the upper side of the upper movable mold (4), and four rectangularly distributed guide sleeves (42) are fixed on the lower side of the beam plate (22). The guide posts (41) and the guide sleeves (42) are slidably connected in a one-to-one correspondence. The elastic member is a spring (43) sleeved outside the guide sleeve (42), and two ends of the spring (43) are respectively against the upper side of the upper movable mold (4) and the lower side of the beam plate (22).

7. A plate edge groove punching and cutting mechanism according to claim 6, characterized in that: The driving device (5) comprises an oil cylinder (51), the cylinder body of the oil cylinder (51) is fixed to the beam plate (22) via a flange plate (53), and the piston rod (52) of the oil cylinder (51) passes through the upper movable die (4) and is fixedly connected to the connecting portion of the punch head (1); a shaft retaining ring (54) is installed on the piston rod (52), and the shaft retaining ring (54) abuts against the lower side of the upper movable die (4).

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