CN213728694U

CN213728694U - Sheet metal processing and bending device

Info

Publication number: CN213728694U
Application number: CN202022462302.4U
Authority: CN
Inventors: 赖以威; 徐建富; 龙立恒; 王福涛; 潘华祥; 周晓伟
Original assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Gree Precision Mold Co Ltd
Current assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Gree Precision Mold Co Ltd
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-07-20
Anticipated expiration: 2030-10-29

Abstract

The application provides a panel beating bending device, the device including lie in respectively material area top and the last mould and the lower mould of below. As shown in fig. 1, the material strip includes a plurality of material plates to be bent, and each material plate includes a main body and a bent edge. Go up the mould and include pushing down the mechanism, push down the mechanism and include: the lower surface of the scraping block is provided with a bulge which is used for extending into a hole on the folded edge to be bent; the male die is used for pressing the material plate downwards so as to bend and form the material plate; and the upper die ejector block can be vertically matched with the floating block of the lower die to clamp the material plate. Utilize this sheet metal working bending device, can prevent that skew or slope from appearing in stamping process flitch to carry out accurate location to the position of bending of flitch, thereby be favorable to avoiding the position of bending to appear the deviation, then be favorable to reducing sheet metal component's defective percentage.

Description

Sheet metal processing and bending device

Technical Field

The utility model relates to a sheet metal working technical field especially relates to a sheet metal working bending device.

Background

The sheet metal machining process is a cold machining process for a metal plate and comprises shearing, bending, riveting, splicing and the like. The flitch forms the sheet metal component through sheet metal working. Sheet metal processing is low in cost and can be used for manufacturing sheet metal parts in large-scale mass production, so that the sheet metal processing is widely applied to the industrial field.

The sheet metal processing and bending device is suitable for bending the material plate to form a bent sheet metal part. The existing bending device enables the material plate to be in a suspended state before the material plate is processed. When bending the processing flitch, the mechanism that pushes down can the unsettled flitch of punching press in order to form the sheet metal component of bending.

However, the unsettled flitch appears squinting or slope easily at the in-process of bending, is unfavorable for bending device to carry out accurate location to the bending position of flitch, causes the deviation of bending position easily, is unfavorable for reducing sheet metal component's defective percentage then.

SUMMERY OF THE UTILITY MODEL

To the problem among the above-mentioned prior art, this application has provided a sheet metal working bending device, and this bending device helps preventing that the flitch from squinting or inclining in the in-process of bending to carry out accurate location to the bending position of flitch, thereby be favorable to avoiding bending the position deviation to appear, then be favorable to reducing the defective percentage of sheet metal component.

The utility model provides a sheet metal working bending device, the device are including last mould and the lower mould that is located material area top and below respectively, the material area includes a plurality of flitchs of waiting to bend, the flitch includes the main part and waits to bend the hem, it includes pushing down the mechanism to go up the mould, it includes to push down the mechanism: the lower surface of the scraping block is provided with a bulge which is used for extending into a hole on the to-be-bent folded edge; the male die is used for pressing the flitch downwards so as to bend and form the flitch; and the upper die ejector block can be vertically matched with the floating block of the lower die to clamp the material plate. Utilize this sheet metal working bending device, can prevent that skew or slope from appearing in stamping process flitch to carry out accurate location to the position of bending of flitch, thereby be favorable to avoiding the position of bending to appear the deviation, then be favorable to reducing sheet metal component's defective percentage.

In one embodiment, the male die penetrates through the scraping block and can move up and down relative to the scraping block, and the upper die ejector block is located at the lower part of the male die and can move up and down relative to the male die. Through this embodiment, be favorable to punching press, take off the smooth going on of material.

In one embodiment, the upper die further comprises an upper die base, an upper clamping plate and an upper stripping plate which are sequentially arranged from top to bottom, the bottom surface of the upper die base is fixedly connected with the top surface of the male die through a fixing assembly, and the upper die ejector block and the scraper block can extend out or retract into the upper stripping plate under the action of an elastic assembly. The embodiment is beneficial to the smooth operation of opening and closing the mold.

In one embodiment, the upper clamping plate and the upper stripper plate are separable from each other. Through this embodiment, can provide space for the upwards moving of going up the stripper plate in flitch bending process.

In one embodiment, an equal-height sleeve is further connected between the scraping block and the upper die base, the bottom end of the equal-height sleeve is fixedly connected with the scraping block, and the top end of the equal-height sleeve is slidably arranged in the upper die base. Through this embodiment, be favorable to fixed scraper piece to be favorable to preventing that scraper piece breaks away from and goes up the stripper plate.

In one embodiment, the lower die comprises a lower template and a lower die seat which are overlapped up and down; the floating block is connected with the lower die base through an elastic assembly and can move up and down in the lower template and the lower die base. Through this embodiment, elastic component is favorable to the floatage piece to keep the contact state of floatage piece and flitch in stamping process to be favorable to preventing skew or slope from appearing in stamping process flitch, carry out accurate location to the position of bending of flitch, then be favorable to avoiding the position of bending to appear the deviation, be favorable to reaching the purpose that reduces the defective percentage of sheet metal component.

In one embodiment, the lower die further comprises a lower die material pressing block, and the lower die material pressing block is connected with the lower die base through an elastic piece and can move up and down in the lower die plate. By this embodiment, smooth press working is facilitated.

In one embodiment, the float block extends through the lower die pad and is capable of moving up and down relative to the lower die pad. Through this embodiment, be favorable to going on smoothly of punching press, also be favorable to the float piece to keep its contact state with the flitch in stamping process.

In one embodiment, the top surface of the float material block can be flush with the top surface of the lower die material block, so that the material plate can be bent under the stamping of the male die. Through this embodiment, be favorable to avoiding the interference of flotation block to stamping process to be favorable to the stamping forming of sheet metal component.

In one embodiment, the gap between the scraper block and the male die is less than the thickness of the plate. Because the clearance between scraping piece and the terrace die is less than the thickness of sheet metal component, scraping piece can hinder sheet metal component and terrace die together to shift up to make terrace die and sheet metal component break away from, fashioned sheet metal component drops. Through this embodiment, be favorable to breaking away from smoothly of sheet metal component and terrace die.

The application provides a sheet metal working bending device compares in prior art, has following beneficial effect.

1. This application can prevent that skew or slope from appearing in punching press in-process flitch to carry out accurate location to the position of bending of flitch, thereby be favorable to avoiding the position of bending to appear the deviation, then be favorable to reducing sheet metal component's defective percentage.

2. The top surface of the float material block can be flush with the top surface of the lower die material pressing block, so that the material plate is bent and formed under the stamping of the male die, the interference of the float material block to the stamping process is favorably avoided, and the stamping forming of the sheet metal part is favorably realized.

3. The clearance between the scraping block and the convex die is smaller than the thickness of the scraping block, and the convex die can move relative to the scraping block, so that the smooth separation of the sheet metal part and the convex die is facilitated.

The above-mentioned technical characteristics can be combined in various suitable ways or replaced by equivalent technical characteristics as long as the purpose of the invention can be achieved.

Drawings

The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings, in which:

fig. 1 shows a schematic structural diagram of a material tape according to an embodiment of the present invention;

fig. 2 shows a schematic structural view of a sheet metal part according to an embodiment of the present invention;

fig. 3 shows a schematic structural diagram of a mold opening state of the sheet metal processing bending device according to an embodiment of the present invention, wherein the material plate is to be bent and formed;

fig. 4 is a schematic structural diagram showing a mold closing state of the sheet metal processing bending apparatus according to an embodiment of the present invention;

fig. 5 shows a schematic structural diagram of the die sinking state of the sheet metal processing bending device according to an embodiment of the present invention, wherein the sheet metal part is bent.

List of reference numerals:

100-a material belt; 110-flitch; 111-a body; 112-folding edges to be bent; 200-a sheet metal part; 1100-scraper block; 1200-a male die; 1300-feeding a mold jacking block; 1400-upper die holder; 1500-upper splint; 1600-upper stripper plate; 2100-floaters; 2200-lower die pressing block; 2300-a lower template; 2400-a lower die holder; 3100-a plug screw; 3200-a spring; 3300-screw; 3400-equal height sleeve.

In the drawings, like parts are provided with like reference numerals. The drawings are not to scale.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1 to 5, the present embodiment provides a sheet metal working bending apparatus including upper and lower dies respectively located above and below a material strip 100. As shown in fig. 1, the material tape 100 includes a plurality of material plates 110 to be bent, and each material plate 110 includes a main body 111 and a bent edge 112. Go up the mould and include pushing down the mechanism, push down the mechanism and include: a scraping block 1100, the lower surface of which is formed with a protrusion for extending into a hole on the to-be-bent edge 112; a punch 1200 for pressing down the material plate 110 to bend and shape the material plate 110; and an upper die ejector block 1300 capable of being vertically engaged with the float block 2100 of the lower die to clamp the flitch 110.

The sheet metal working bending apparatus of the present embodiment is used for bending the material plate 110. Alternatively, as shown in fig. 1 and fig. 2, the to-be-bent edges 112 of the material plate 110 may be distributed along the periphery of the main body 111 of the material plate 110, and the bent edges of the bent sheet metal part 200 are perpendicular to the main body, wherein the bent sheet metal part 200 is formed by bending the material plate 110.

The sheet metal working bending device of the present embodiment includes an upper die and a lower die, which can complete the punch forming of the material plate 110 by opening and closing the die to form the bent sheet metal part 200.

The upper die comprises a pressing mechanism which is a main sheet metal part 200 bending forming and stripping mechanism. The hold-down mechanism includes a scraper block 1100, a punch 1200, and an upper die ejector block 1300. The lower surface of the scraper block 1100 is formed with protrusions for protruding into holes on the edge 112 to be bent, thereby assisting the positioning and downward movement of the material plate 110, and ensuring that the material plate 110 does not deviate from its downward movement path during the downward movement to accurately reach its punching position.

The male die 1200 is used to stamp the material plate 110 to bend and shape the material plate 110. After the sheet metal part 200 is bent and formed, the main body of the sheet metal part 200 is attached to the bottom surface of the male die 1200, and the bent edge of the sheet metal part 200 is attached to the side wall of the male die 1200, so that the bent sheet metal part 200 wraps the male die 1200. At this time, the upward male die 1200 can move upward together with the sheet metal part 200 wrapped at the bottom thereof until the bending edge of the sheet metal part 200 comes into contact with the scraping block 1100. The scraping block 1100 is able to remove the sheet metal part 200 from the male die 1200, the sheet metal part 200 falling under the action of gravity.

The upper die ejector block 1300 can vertically clamp the material plate 110 with the float block 2100. As shown in fig. 4, the clamping state starts from the contact of the upper die ejector block 1300, the upper stripper plate 1600 and the material plate 110 to the end of the stamping process in the die closing state, until the die is opened again and the upper die ejector block 1300 is separated from the sheet metal part 200. Because in the whole stamping process, the upper die ejector block 1300 and the floating block 2100 clamp the material plate 110 up and down, the deviation or the inclination of the material plate 110 in the bending process can be favorably prevented, the bending position of the material plate 110 is accurately positioned, the deviation of the bending position is favorably avoided, and the defective rate of the sheet metal part 200 is favorably reduced.

This embodiment can prevent offset or slope from appearing in flitch 110 in stamping process through the setting mechanism of pushing down of the last mould of mutually supporting and the flotation block 2100 of lower mould to carry out accurate location to the bending position of flitch 110, thereby be favorable to avoiding the bending position deviation to appear, then be favorable to reducing sheet metal component 200's defective percentage.

As shown in fig. 3 to 5, alternatively, the punch 1200 of the present embodiment penetrates the scraper block 1100 and can move up and down with respect to the scraper block 1100, and the upper die ejector block 1300 is located below the punch 1200 and can move up and down with respect to the punch 1200.

The punch 1200 can move up and down relative to the scraper block 1100. In the mold opening state, the bottom surface of the male mold 1200 is flush with the bottom surface of the scraping block 1100; in the closed state, the scraping block 1100 is located in the upper stripper plate 1600, and the male die 1200 extends into the lower die plate 2300, so that the sheet metal part 200 is formed. Meanwhile, in the stripping process, the male die 1200 can move upward relative to the scraping block 1100, which is beneficial to smooth removal of the sheet metal part 200.

The upper die ejector block 1300 is located below the male die 1200 and can move up and down relative to the male die 1200. In the state of opening the mold, the bottom surface of the upper mold ejector block 1300 is flush with the bottom surface of the upper stripper plate 1600, and the bottom surface of the upper mold ejector block 1300 protrudes from the bottom surface of the male mold 1200. In the closed state, the bottom surface of the upper die ejector block 1300 is flush with the bottom surface of the punch 1200, and the two, the floating block 2100 and the lower die pressing block 2200 are respectively located on the upper and lower sides of the material plate 110 and are connected to the material plate 110 under pressure.

As shown in fig. 3 to 5, optionally, the upper die of this embodiment further includes an upper die base 1400, an upper clamping plate 1500, and an upper stripper plate 1600, which are sequentially arranged from top to bottom, a bottom surface of the upper die base 1400 is fixedly connected to a top surface of the male die 1200 through a fixing assembly, and the upper die ejector block 1300 and the scraper block 1100 can extend or retract to the upper stripper plate 1600 under the action of an elastic assembly.

The bottom surface of the upper die holder 1400 is fixedly connected to the top surface of the male die 1200 by a fixing member, so that the upper die holder 1400 and the male die 1200 are integrated and move up and down at the same time. Optionally, the securing assembly comprises a screw 3300. Optionally, the screw 3300 is a socket head cap screw. Optionally, the upper die base 1400 is provided with a sunken platform and a hole, and the hole is used for the inner hexagonal screw to pass through; a thread hole is tapped on the male die 1200 for connecting a hexagon socket head cap screw. The male mold 1200 can penetrate the upper clamping plate 1500 and the upper stripper plate 1600.

The upper die ejector block 1300 and the scraper block 1100 can extend out or retract into the upper stripper plate 1600 under the action of the elastic assembly, so that the smooth operation of die opening and die closing is facilitated. Optionally, the resilient assembly comprises a plug 3100 and a spring 3200. Taking scraper 1100 as an example, holes are drilled in upper die holder 1400, upper clamp plate 1500, and upper stripper plate 1600 for receiving springs 3200. The bottom end of the spring 3200 is pressure-connected to the top end of the scraper block 1100. Meanwhile, the hole wall of the upper die holder 1400 is tapped with threads for locking the plug 3100. When the spring 3200 is compressed, the plug 3100 plays a limiting role, which is beneficial to preventing the plug 3100 from separating from the upper die base 1400.

As shown in fig. 3, the upper clamping plate 1500 and the upper stripper plate 1600 of the present embodiment can be optionally separated from each other.

In the open state, the upper clamping plate 1500 is separated from the upper stripper plate 1600. In the closed mold state, the upper clamping plate 1500 and the upper stripper plate 1600 are attached to each other. The upper clamping plate 1500 and the upper stripper plate 1600 which are separated from each other can provide a space for the upper stripper plate 1600 to move upwards during the bending process of the material plate 110.

As shown in fig. 3 to 5, optionally, an equal-height sleeve 3400 is further connected between the scraping block 1100 and the upper die holder 1400 of the present embodiment, a bottom end of the equal-height sleeve 3400 is fixedly connected with the scraping block 1100, and a top end of the equal-height sleeve 3400 is slidably disposed in the upper die holder 1400.

Optionally, the upper die holder 1400, upper clamp plate 1500 and upper stripper plate 1600 are drilled with holes for receiving, placing in, the contoured sleeves 3400. The contoured sleeve 3400 can be placed into the hole of the upper diaphragm seat. The threads at the bottom of the contour sleeve 3400 fit into the tapped holes at the top of the scraping block 1100, thereby connecting the contour sleeve 3400 and the scraping block 1100. Optionally, the apertures of the upper clamping plate 1500 and the upper stripper plate 1600 are smaller than the apertures of the upper die base 1400, so as to limit the top of the equal-height sleeve 3400 in the upper die base 1400, thereby serving as a limiting function. The use of the contour sleeve 3400 can facilitate securing the scraper block 1100, thereby facilitating preventing the scraper block 1100 from disengaging from the upper stripper plate 1600.

As shown in fig. 3 to 5, optionally, the lower die of the present embodiment includes a lower die plate 2300 and a lower die holder 2400 stacked up and down; the float block 2100 is connected to the lower die base 2400 by an elastic member and can move up and down in the lower die plate 2300 and the lower die base 2400.

In the mold opening state, the top of the floating block 2100 protrudes out of the top of the lower template 2300, and the bottom of the floating block 2100 is located in the lower template 2300. In the closed mold state, the top of the float block 2100 is located in the lower platen 2300, and the bottom of the float block 2100 is located in the lower die base 2400. The elastic assembly is provided to help the float block 2100 maintain its contact with the material plate 110 during the stamping process.

Optionally, the resilient assembly comprises a plug 3100 and a spring 3200. Holes are drilled in the lower die holder 2400 and the lower die plate 2300 and are used for accommodating the springs 3200. The top end of spring 3200 is in pressurized connection with the bottom end of buoyant mass 2100. Meanwhile, threads are tapped on the hole wall of the lower die holder 2400 to lock the plug 3100. When the spring 3200 is compressed, the plug screw 3100 plays a limiting role, and the plug screw 3100 is prevented from being separated from the lower die holder 2400.

As shown in fig. 3 to 5, optionally, the lower die of this embodiment further includes a lower die pad 2200, and the lower die pad 2200 is connected to the lower die base 2400 through an elastic member and can move up and down in the lower die plate 2300.

In the die opening state, the top surface of the lower die pressing block 2200 is flush with the top surface of the lower die plate 2300; in the mold closing state, the bottom surface of the lower mold pressing block 2200 is flush with the bottom surface of the lower template 2300; and the height of the lower die swage block 2200 is smaller than the thickness of the lower die plate 2300. Optionally, the resilient member is a spring 3200. The lower die pressing block 2200 is connected with the lower die holder 2400 through an elastic member and can move up and down in the lower die plate 2300, thereby facilitating smooth punching.

As shown in fig. 3 to 5, alternatively, the float mass 2100 of the present embodiment penetrates the lower die pad 2200 and can move up and down with respect to the lower die pad 2200.

In the mold opening state, the top of the float mass 2100 protrudes out of the top of the lower mold swage block 2200. In the closed mold state, the top of the float mass 2100 is flush with the top of the lower mold swage block 2200. The float block 2100 penetrates through the lower die pressing block 2200 and can move up and down relative to the lower die pressing block 2200, so that smooth punching is facilitated, and the contact state of the float block 2100 and the material plate 110 is maintained in the punching process.

As shown in fig. 4, alternatively, the top surface of the float block 2100 of the present embodiment may be flush with the top surface of the lower die press block 2200 so that the material plate 110 is bent under the punching of the punch 1200.

During stamping, the top surface of the float block 2100 is flush with the top surface of the lower die pad 2200 to avoid interference of the float block 2100 with the stamping process, so that the material plate 110 is bent under the stamping of the male die 1200.

Alternatively, the gap between the scraper block 1100 and the punch 1200 of the present embodiment is smaller than the thickness of the flitch plate 110.

After bending is finished, the upper die vertically moves upwards to return to the die opening state. In the process, the male die 1200 moves upwards, the formed sheet metal part 200 moves upwards along with the male die 1200 until the bent edge of the sheet metal part 200 contacts the scraping block 1100, and because the gap between the scraping block 1100 and the male die 1200 is smaller than the thickness of the bent edge of the sheet metal part 200, when the male die 1200 continues to move upwards relative to the scraping block, the scraping block 1100 prevents the sheet metal part 200 from moving upwards together with the male die 1200, the male die 1200 is separated from the sheet metal part 200, and the formed sheet metal part 200 falls.

This embodiment is beneficial to the smooth separation of the sheet metal part 200 from the male die 1200.

Example one

The sheet metal processing and bending device comprises an upper die and a lower die. The upper die comprises an upper die seat 1400, an upper clamping plate 1500 and an upper stripper plate 1600 which are arranged from top to bottom in sequence. The lower die comprises a lower die base 2400 and a lower die plate 2300 which are sequentially arranged from bottom to top.

The upper die includes a hold-down mechanism that includes a scraper block 1100, a punch 1200, and an upper die ejector block 1300.

As shown in fig. 3, when the sheet metal working bending apparatus is in the mold opening state, the upper clamp plate 1500 and the upper stripper plate 1600 are in the separated state. The floating block 2100 of the lower die lifts the material plate 110, the top of the floating block 2100 is higher than the top of the lower die plate 2300, and the top of the lower die pressing block 2200 is flush with the top of the lower die plate 2300. The bottom of the float mass 2100 is located in the lower die plate 2300, and the top surface of the lower die press mass 2200 is flush with the top surface of the lower die plate 2300. The bottom surface of the scraper block 1100 protrudes from the bottom surface of the upper stripper plate 1600. The upper die ejector block 1300 is located in the upper stripper plate 1600.

In the process that the metal plate machining bending device is in the die opening state to the die closing state, the upper die vertically moves downwards. The protrusion on the lower surface of the scraper block 1100 first extends into the hole on the edge 112 of the feeding plate 110 to be bent. Next, the upper stripper plate 1600 contacts the top surface of the material plate 110 simultaneously with the bottom surface of the upper die ejector block 1300. At this time, the upper die ejector block 1300 is vertically engaged with the float block 2100 to clamp the flitch 110.

The upper mold continues to be pressed down, moving the material plate 110 down until the material plate 110 contacts the lower mold plate 2300. In this process, the upper die ejector block 1300 and the floating block 2100 keep a clamping state on the material plate 110, and the bottom surface of the upper die ejector block 1300 and the top surface of the floating block 2100 move downwards slowly along with the material plate 110.

Then, the punch 1200 presses the lower die pressing block 2200 to continue moving downwards, the material plate 110 is bent to form the sheet metal part 200, the main body 111 of the bent sheet metal part 200 is attached to the bottom surface of the punch 1200, and the bent edge of the sheet metal part 200 is attached to the side wall of the punch 1200 to form a package of the bent sheet metal part 200 on the punch 1200. In the bending process, the upper clamping plate 1500 and the upper stripper plate 1600 are attached to each other, and the top surface of the floating block 2100 is flush with the top surface of the lower die pressing block 2200, so that the material plate 110 is bent and formed under the punching of the male die 1200.

As shown in fig. 4, when the bending is completed, the bottom of the float block 2100 is located in the lower die base 2400, and the top of the float block 2100 is located in the lower die plate 2300. The bottom surface of lower die pad 2200 is flush with the bottom surface of lower platen 2300. The bottom surface of the punch 1200 and the bottom surface of the upper die ejector block 1300 are attached to the top surface of the lower die swage block 2200. The bottom surface of the scraper block 1100 is attached to the bottom surface of the upper stripper plate 1600.

After the bending is completed, the upper mold is moved vertically upward to return to the mold open position, as shown in fig. 5. In the process, the male die 1200 moves upwards, the formed sheet metal part 200 moves upwards along with the male die 1200 until the bent edge of the sheet metal part 200 contacts the scraping block 1100, and because the gap between the scraping block 1100 and the male die 1200 is smaller than the thickness of the bent edge of the sheet metal part 200, when the male die 1200 continues to move upwards relative to the scraping block, the scraping block 1100 prevents the sheet metal part 200 from moving upwards together with the male die 1200, the male die 1200 is separated from the sheet metal part 200, and the formed sheet metal part 200 falls.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.

Claims

1. The utility model provides a sheet metal working bending device, its characterized in that, includes last mould and the lower mould that is located material area top and below respectively, the material area includes a plurality of flitchs of waiting to bend, the flitch includes the main part and waits to bend the hem, go up the mould and include pushing down the mechanism, it includes to push down the mechanism:

the lower surface of the scraping block is provided with a bulge which is used for extending into a hole on the to-be-bent folded edge;

the male die is used for pressing the flitch downwards so as to bend and form the flitch; and

and the upper die ejector block can be vertically matched with the floating block of the lower die to clamp the material plate.

2. The sheet metal working bending device according to claim 1, wherein the male die penetrates through the scraping block and can move up and down relative to the scraping block, and the upper die ejector block is located at the lower portion of the male die and can move up and down relative to the male die.

3. The sheet metal working bending device according to claim 1, wherein the upper die further comprises an upper die base, an upper clamping plate and an upper stripper plate which are sequentially arranged from top to bottom, the bottom surface of the upper die base is fixedly connected with the top surface of the male die through a fixing assembly, and the upper die ejector block and the scraper block can extend out or retract into the upper stripper plate under the action of an elastic assembly.

4. The sheet metal working bending apparatus according to claim 3, wherein the upper clamping plate and the upper stripper plate are separable from each other.

5. The sheet metal working bending device according to claim 3, wherein an equal-height sleeve is further connected between the scraping block and the upper die base, the bottom end of the equal-height sleeve is fixedly connected with the scraping block, and the top end of the equal-height sleeve is slidably arranged in the upper die base.

6. The sheet metal working bending device according to claim 1, wherein the lower die comprises a lower die plate and a lower die base which are stacked up and down; the floating block is connected with the lower die base through an elastic assembly and can move up and down in the lower template and the lower die base.

7. The sheet metal working bending device according to claim 6, wherein the lower die further comprises a lower die material pressing block, and the lower die material pressing block is connected with the lower die base through an elastic piece and can move up and down in the lower die plate.

8. The sheet metal working bending device according to claim 7, wherein the float block penetrates through the lower die material pressing block and can move up and down relative to the lower die material pressing block.

9. The sheet metal working bending device according to claim 8, wherein the top surface of the floating material block can be flush with the top surface of the lower die material pressing block, so that the material plate can be bent and formed under the punching of the male die.

10. The sheet metal working bending apparatus according to any one of claims 1 to 9, wherein a gap between the scraper block and the male die is smaller than a thickness of the plate.