CN113967681B

CN113967681B - Equipment for processing multi-curvature elastic piece

Info

Publication number: CN113967681B
Application number: CN202010709792.5A
Authority: CN
Inventors: 李谢峰; 付仕; 徐兆江; 袁野; 张�杰; 钱智莲; 欧玉俊; 徐意; 徐腾飞
Original assignee: Shanghai Aircraft Manufacturing Co Ltd
Current assignee: Shanghai Aircraft Manufacturing Co Ltd
Priority date: 2020-07-22
Filing date: 2020-07-22
Publication date: 2023-10-13
Anticipated expiration: 2040-07-22
Also published as: CN113967681A

Abstract

The present invention relates to an apparatus for processing a multi-curvature elastic member. The multi-curvature elastic member forms a narrow-mouth-type accommodation chamber at an outer edge. The device of the invention comprises an upper template mechanism and a lower template mechanism. The downward surface of the upper template mechanism is provided with a plurality of downward extending inclined wedges. The upper surface of the lower template mechanism is provided with a forming module and a sliding block unit. When the upper template mechanism and the lower template mechanism move relatively, the inclined wedge block pushes the sliding unit to form the multi-curvature elastic piece. The slider unit comprises at least one first slider unit having a first top piece. The first roof is movable towards the forming module under the action of the corresponding inclined wedges in a direction at an angle to the upwardly facing surface of the lower template mechanism. The apparatus of the present invention is particularly useful for forming resilient members having a narrow mouth receiving chamber.

Description

Equipment for processing multi-curvature elastic piece

Technical Field

The invention relates to the field of elastic piece forming equipment, in particular to equipment for processing a multi-curvature elastic piece.

Background

Elastic parts with multi-curvature profiles are widely used in the aerospace industry and other industries. The multi-curvature elastic piece has complex appearance and higher requirements on dimensional accuracy and form and position tolerance.

The existing multi-curvature elastic piece is formed by manual bending or pressing by a punch press. The manual bending can only bend a limited area at a time, so that the forming process can be completed through a plurality of bending methods. The manufacturing method of manual bending has the defects of complicated working procedures, long bending time and low processing efficiency. In addition, since it is difficult for a worker to ensure that each bending work of the sheet is performed using the same force, this may result in a different amount of rebound after each bending of the sheet. The rebound quantity of the plate after the last bending process can influence the next bending work. After different bending procedures, the rebound quantity of the plate is different, so that the consistency of the formed elastic piece is poor, and the finished product rate of the part is lower.

The punch press can form a plurality of bending parts at one time, so that the condition of poor forming quality caused by different rebound amounts of the plates in different bending procedures can be avoided. However, the respective punching heads of the existing punching machine move in one plane, so that the type of elastic member that can be formed by the punching machine is limited. For example, the ram of existing punches can move in the plane defined by the 4 arrows shown in fig. 1. Each punch is moved toward the center forming module to cooperatively press the straight plate material fixed to the forming module to form the same. However, for the multi-curvature elastic member 1 shown in fig. 1, the outer edge position of the curvature elastic member has a narrow-mouth-shaped accommodation chamber A2. Since the lateral dimension of the opening of the receiving chamber A2 is smaller than the maximum lateral dimension of the internal chamber thereof, if the punch moves toward the forming module in the direction of arrow R1 or at an acute angle to arrow R1, the punch is blocked by the opening of the receiving chamber A2 and cannot proceed further to form the receiving chamber A2.

For the multi-curvature elastic member shown in fig. 1, the conventional punch cannot be formed at one time. Specifically, the punching machine needs to complete the punching work of the bending parts 2, 4, 5 first; then, the stamping head for forming the bending part 2 is replaced by a stamping head capable of simultaneously corresponding to the bending parts 1 and 2 by a worker, and the bending parts 1 and 3 are formed by a punching machine. Obviously, the forming process still has the defects of complicated working procedures, long bending time and low processing efficiency.

Disclosure of Invention

In view of the above-described state of the art and processing equipment for multi-curvature elastic members, it is an object of the present invention to provide an apparatus for processing multi-curvature elastic members, which is capable of molding multi-curvature elastic members having a specific curvature at one time.

This object is achieved by the device of the invention in the form. The multi-curvature elastic piece comprises a plurality of first bending parts capable of jointly limiting the narrow-mouth-shaped accommodating cavity and second bending parts which are spaced from the first bending parts. The first bending part and the second bending part can mutually surround to form an inner space. According to one embodiment of the invention, the apparatus includes an upper template mechanism and a lower template mechanism. A plurality of downward extending wedges are provided on a downward facing surface of the upper template mechanism, each of the plurality of wedges being positioned to correspond to a position of at least one of the plurality of bends.

The lower die plate mechanism is arranged below the upper die plate mechanism, wherein an upward surface of the lower die plate mechanism facing the upper die plate mechanism is provided with a molding module and a slider unit. The molding module is configured such that its outer shape matches the shape of the inner space. The sliding block units are arranged in one-to-one correspondence with the inclined wedge blocks. Each of the slider units is configured to be moved toward the forming module along the upward facing surface of the lower die plate mechanism by being urged by the inclined wedges upon relative movement of the upper die plate mechanism and the lower die plate mechanism, and cooperates with the forming module to form a sheet material into the multi-curvature elastic member.

The sliding block unit comprises at least one first sliding block unit and a first top block, wherein the first top block is matched with the shape of at least two first bending parts in shape, and is configured to move towards the forming module along the direction forming an angle with the upward surface of the lower template mechanism under the action of corresponding inclined wedges, so that the first top block can be matched with the forming module and the adjacent sliding block unit simultaneously to form the at least two first bending parts.

Because the moving path of the first top block of the first sliding block unit and the moving paths of other sliding block units are not in the same plane, the first top block can be conveniently and jointly formed with other sliding block units into a narrow-mouth accommodating cavity, and the multi-curvature elastic piece with the narrow-mouth accommodating cavity can be conveniently and once formed.

According to a preferred embodiment of the invention, the first slider unit further comprises a first slider and a crank mechanism. The crank link mechanism rotatably connects the first slider and the first top block, respectively, and is configured to be able to cause the first top block to move up or down to form a plurality of the first bending portions as the first slider moves.

According to a preferred embodiment of the invention, the first ejector block comprises two sub-ejector plates rotatably fixed to the end of the crank mechanism facing the forming module, the two sub-ejector plates being arranged opposite each other, each sub-ejector plate being provided with a forming projection for forming the first bending portion. The downward surface of the upper template mechanism also comprises a thimble. When the first ejector block moves up or down and abuts against the plate, the ejector pin can penetrate between the two sub-top plates, so that the two sub-top plates rotate in the direction away from each other and press the plate.

According to a preferred embodiment of the present invention, the crank link mechanism includes a first link, a second link, and a third link, wherein both ends of the first link are respectively rotatably connected to one ends of the first slider and the second link, the other end of the second link is connected to the first top block, and both ends of the third link are respectively rotatably connected to a side surface of the second link and the upward facing surface.

According to a preferred embodiment of the invention, the slider unit comprises a second slider unit comprising a second slider, a second ejector block and an ejector rod. The second top block is provided with a pushing surface matched with the second bending part in shape. The two ends of the pushing rod are respectively fixed on the second sliding block and the second pushing block in a rotating mode, and the pushing rod can move towards the forming module along a preset track under the action of the second sliding block.

According to a preferred embodiment of the present invention, the second slider unit further includes a guide mechanism including a stopper rod extending downward from a lower surface of the second top block and a guide base. The guide base is provided with a guide groove for accommodating and guiding the limiting rod. When the limiting rod moves along the guide groove, the guide groove can guide the second top block to advance and rotate, so that the second top block forms the second bending part.

According to a preferred embodiment of the invention, the slider unit comprises a third slider unit configured to be able to bend both ends of the sheet material towards the same side of the sheet material.

According to a preferred embodiment of the present invention, the slider unit includes a fourth slider unit disposed opposite to the third slider unit, the fourth slider unit being configured to be capable of bending both end portions of the plate material into a first bending portion and a second bending portion, respectively, in a substantially semicircular configuration in conjunction with the first top block and the second top block.

According to a preferred embodiment of the invention, the second, third and fourth slider units are positioned so as to be able to move simultaneously to the end of the movement path.

According to a preferred embodiment of the present invention, the lower die plate mechanism further includes a reset unit in one-to-one correspondence with each of the slider units, the reset unit being configured to automatically move the slider units to an original state in a direction away from the molding modules.

According to a preferred embodiment of the present invention, the reset unit includes a reset plate, a reset bolt, and a reset elastic member. The reset plate is fixed to the upward facing surface and has a through hole parallel to the corresponding slider unit moving path. The reset bolt can pass through the through hole and is fixed on the sliding block unit. The reset elastic piece can be respectively abutted against the head of the reset bolt and the reset plate. The return spring is configured to be in tension when the slider unit is against a sheet material located on the forming module.

The lower template mechanism further comprises limiting guide rails which are in one-to-one correspondence with the sliding block units, and the limiting guide rails limit the moving path of the sliding block units.

The invention also relates to a method for manufacturing a multi-curvature elastic member by using any of the above devices. Specifically, the method comprises the following steps:

vertically laying the sheet on the forming die plate;

the upper template mechanism is moved downwards and/or the lower template mechanism is moved upwards, so that the third sliding block unit moves towards the forming template and bends the two ends of the plate towards the same side of the plate;

and continuing to move the upper template mechanism downwards and/or move the lower template mechanism upwards, so that the first sliding block unit, the second sliding block unit and the fourth sliding block unit move towards the forming module together to bend the plate into the multi-curvature elastic piece.

According to a preferred embodiment of the present invention, in the step of continuing to move down the upper die plate mechanism and/or to move up the lower die plate mechanism, the respective sliders of the second slider unit, the third slider unit, and the fourth slider unit complete the movement at the same time.

According to a preferred embodiment of the present invention, in the step of bending the multi-curvature elastic member, the respective sliders of the second slider unit, the third slider unit, and the fourth slider unit start to move at different timings.

On the basis of the common sense in the art, the above preferred embodiments can be arbitrarily combined to obtain each preferred embodiment of the present invention. Other systems, methods, features and advantages of the invention will be or become apparent to one with skill in the art upon examination of the following figures and detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description and this summary, be within the scope of the invention, and be protected by the accompanying claims.

Drawings

For a better understanding of the above and other objects, features, advantages and functions of the present invention, reference should be made to the preferred embodiments illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings. It will be appreciated by persons skilled in the art that the drawings are intended to schematically illustrate preferred embodiments of the invention, and that the scope of the invention is not limited in any way by the drawings, and that the various components are not drawn to scale.

Fig. 1 is a schematic view of a multi-curvature spring having a narrow mouth receiving chamber.

Fig. 2 is a schematic structural view of an apparatus for processing a multi-curvature elastic member according to a preferred embodiment of the present invention.

Fig. 3 is a perspective view of the cope match-plate pattern mechanism of the apparatus of fig. 2.

Fig. 4A-4D are perspective views of the lower template mechanism of fig. 2.

Fig. 5A-5D are top views of the lower die plate mechanism of fig. 2, wherein fig. 5A-5D illustrate the lower die plate mechanism in different states.

Fig. 6A is a schematic structural view of the first slider unit in an initial state.

Fig. 6B is a schematic structural view of the first slider unit in the end state.

Fig. 7A is a top view of the second slider unit of fig. 2 in an initial state.

Fig. 7B is a bottom view of the second slider unit of fig. 2 in an initial state.

Fig. 8A is a top view of the second slider unit of fig. 2 in an end state.

Fig. 8B is a bottom view of the second slider unit of fig. 2 in an end state.

Fig. 9A-9D are schematic illustrations of a process for forming a multi-curvature spring.

Detailed Description

The inventive concept of the present invention will be described in detail with reference to the accompanying drawings. What has been described herein is merely a preferred embodiment according to the present invention, and other ways of implementing the invention will occur to those skilled in the art on the basis of the preferred embodiment, and are intended to fall within the scope of the invention as well. In the following detailed description, directional terms, such as "upper", "lower", "inner", "outer", "longitudinal", "transverse", etc., are used with reference to the directions described in the drawings. The components of embodiments of the present invention can be positioned in a number of different orientations and the directional terminology is used for purposes of illustration and is in no way limiting.

Referring to fig. 2, an apparatus for processing a multi-curvature resilient member is shown. The apparatus is suitable for processing elastic members 40 having complex multi-curvatures as shown in fig. 1, and elastic members having similar structures to fig. 1.

In the multi-curvature elastic member 40 shown in fig. 1, it includes a plurality of first bent portions 1, 2 capable of collectively defining a narrow-mouth-shaped accommodation chamber A2 and second bent portions 3, 4, 5 spaced apart from the first bent portions 1, 2. The first bent portions 1, 2 and the second bent portions 3, 4, 5 can mutually surround to form an inner space S1.

Referring to fig. 2, an apparatus for processing the multi-curvature elastic member 40 shown in fig. 1 according to the present invention includes an upper die plate mechanism 10 and a lower die plate mechanism 20 located below the upper die plate mechanism 10. The sides of the upper and lower die plate mechanisms 10 and 20 facing away from each other may be fixed to support columns, not shown. One or both of the two support columns are actuated by the mechanical transmission of the press to move the upper and lower die plate mechanisms 10, 20 toward each other. For convenience of explanation, the following description will be given by taking only an example in which the lower support column supporting the lower die plate mechanism 20 of the present invention is set as a fixed member without an actuating mechanism. In this embodiment, the bending work of the sheet material 30 is actuated by the downward movement of the upper support column supporting the upper die plate mechanism 10. It will be appreciated that those skilled in the art will be able to implement embodiments in which the upper support column is provided as a fixed member, the lower support column is provided as a movable member, or both the upper and lower support columns are provided as movable members, with reference to the following description. The two schemes are also the technical schemes which the invention is intended to protect.

Referring to fig. 3, the cope match-plate pattern mechanism 10 is shown from a perspective of a lower position of the cope match-plate pattern mechanism 10 of fig. 2. As shown in fig. 3, a plurality of inclined wedges 11, 12, 13, 14 extending downward are provided on the downward facing surface of the upper die plate mechanism 10 (i.e., the surface facing the lower die plate mechanism 20). Each of the plurality of wedges 11, 12, 13, 14 is positioned to correspond to a position of at least one of the plurality of bent portions 1-5. The inclined wedges 11, 12, 13, 14 have inclined wedge conical surfaces S1.

Referring to fig. 4A-4D, the lower die plate mechanism 20 is shown from a different perspective with the multi-curvature spring 40 manufactured. The upwardly facing surface of the upper face template mechanism 10 of the lower template mechanism 20 is provided with a molding module 700 and slider units 100, 200, 300, 400. Corresponding to the multi-curvature elastic member 40 shown in fig. 1, the molding module 700 can be seen in fig. 9A to 9B, and has an outer shape matching the shape of the inner space A1 of the multi-curvature elastic member 40.

Referring to fig. 1, the slider units 100, 200, 300, 400 of the lower template mechanism 20 are disposed in one-to-one correspondence with the respective inclined wedges 11, 12, 13, 14. Each slider unit 100, 200, 300, 400 is configured to be urged by inclined wedges 11, 12, 13, 14 to move along an upwardly facing surface of lower platen mechanism 20 toward forming module 700 and to cooperate with forming module 700 to form sheet 30 into multi-curvature resilient member 40 upon relative movement of upper platen mechanism 10 and lower platen mechanism 20 toward each other. Specifically, each of the slider units 100, 200, 300, 400 has a slider tapered surface S2 thereon that mates with the wedge tapered surface S1 of the inclined wedges 11, 12, 13, 14. With the downward movement of the upper template mechanism 10, the inclined wedges 11, 12, 13, 14 move downward simultaneously, and the wedge cone S1 abuts against the slider cone S2, so that the slider units 100, 200, 300, 400 move toward the molding module 700 at the upward surface of the lower template mechanism 20.

For the multi-curvature spring 40 shown in fig. 1, it can be shaped by 4 slider units 100, 200, 300, 400 shown in fig. 4A-4D. The respective slider units 100, 200, 300, 400 for forming the different bent portions 1, 2, 3, 4, 5 of the multi-curvature elastic member 40 are described below with reference to the accompanying drawings.

Referring to fig. 4A-4D in conjunction with fig. 6A-6B, fig. 6A, 6B show the state of the first slider unit 100 in an initial state and an end point, respectively. The first slider unit 100 is used to form the first bending portions 1, 2 of fig. 1 with the other slider units 300, 400. The first slider unit 100 includes a first top block 110 having a shape matching the shape of the first bent portions 1, 2. The first top block 110 is configured to be movable toward the forming module 700 in a direction angled to the upward surface of the lower die plate mechanism 20 by the first inclined wedge 11, so that the first top block 110 can simultaneously form the first bent portions 1, 2 in cooperation with the forming module 700 and the adjacent slider units 300, 400.

In the embodiment of fig. 4A-4D, 6A-6B, the upward movement of the first top block 110 is actuated by the first slider 120 and crank linkage of the first slider unit 100. Wherein the crank link mechanism rotatably connects the first slider 120 and the first top block 110, respectively, and is configured to cause the first top block 110 to move upward to form the first bent portions 1, 2 as the first slider 120 moves. The crank linkage includes a first link 130, a second link 140, and a third link 150. The two ends of the first link 130 are rotatably connected to one ends of the first slider 120 and the second link 140, respectively. The other end of the second link 140 is rotatably connected to the first top block 110. Both ends of the third link 150 are rotatably coupled to the side and the upward surface of the second link 140, respectively. The third link 150 may be separately provided at both sides of the second link 140, and 2 sets such as fig. 6A, 6B or more are provided along the length direction of the second link 140 so that the second link 140 can smoothly move up.

It will be appreciated that the crank linkage may also be arranged to form the first bends 1, 2 by a downward movement of the second link 140.

Referring to fig. 4A-5D, wherein fig. 5A-5D illustrate top views of lower die plate mechanism 20 at various steps in forming multi-curvature spring 40. As shown in the above figures, the first top block 110 includes two sub-top plates 110A, 110B rotatably fixed to the end of the crank link mechanism toward the molding module 700 (i.e., the end of the second link 140 toward the molding module 700). The two sub-top plates 110A, 110B are disposed opposite to each other, and one end thereof is hinge-fixed to each sub-top plate 110A, 110B, and is provided with a forming protrusion for forming the first bending portion 1, 2.

To actuate rotation of the two sub-top plates 110A, 110B, the downward surface of the upper template mechanism 10 is provided with ejector pins 17 shown in fig. 3, 5D. When the first ejector block 110 moves up and abuts against the sheet 30, the ejector pins 17 can penetrate between the two sub-top plates 110A, 110B, so that the two sub-top plates 110A, 110B are rotated in a direction away from each other and press the sheet 30 (see the process of fig. 5C to 5D).

Referring to fig. 4A-5D in combination with fig. 7A-8B, wherein fig. 7A, 7B show top and bottom views (with fig. 2 as a reference direction) of the second slider unit 200 in its original state, respectively; fig. 8A and 8B show top and bottom views, respectively, of the second slider unit 200 in a bent state of the plate material 30. As shown in the above drawings, the second slider unit 200, which is engaged with the second inclined wedge 12 and is used to form the second bending portion 3 shown in fig. 1, includes the second slider 210, the second ejector 220, the guide mechanism and the ejector pin 230. The second top block 220 has a pushing surface matching the shape of the second bending portion. Both ends of the push rod 230 are rotatably fixed to the second slider 210 and the second push block 220, respectively, which are configured to be movable toward the molding module 700 along a predetermined trajectory by the second slider 210 to form the second bending portion 3.

The guide mechanism includes a stopper rod (not shown) extending downward from the lower surface of the second top block 220 and a guide base 240. The guide base 240 is provided with a guide groove (not shown) for receiving and guiding the stopper rod. When the limit rod moves along the guide groove, the guide groove can guide the second top block 220 to advance and rotate so that the second top block 220 can move from the state of fig. 7A and 7B to the state of fig. 8A and 8B to form the second bending part 3.

With continued reference to fig. 4A-5D, a third slider unit 300, which cooperates with the third inclined wedges 13 and is used to form the second bending portions 4, 5, is capable of bending both ends of the sheet 30 toward the same side of the sheet 30 (corresponding to the process of fig. 9A-9B). Unlike the first and second slider units 100 and 200, the third slider unit 300 directly acts on the plate 30 fixed to the upwardly facing surface of the lower template mechanism 20 by the corresponding third wedges 13, and the third slider unit 300 does not require the provision of a plurality of components in dynamic connection with each other, i.e., the third slider unit 300 is formed as an integral element.

The fourth slider unit 400 (i.e., no. 2 slider assembly) and the third slider unit 300, which are engaged with the fourth inclined wedge 14 and are used to form the first and second bending portions 1 and 3, are disposed opposite to each other, and are configured to be capable of bending both end portions of the plate material 30 into the first and second bending portions 1 and 3, respectively, having a substantially semicircular configuration, together with the first and second top blocks 110 and 220. According to one embodiment of the invention, the fourth slider unit 400 is also formed as a one-piece element.

Referring further to fig. 4A to 4D, the lower die plate mechanism 20 is further provided with a reset unit 500 in one-to-one correspondence with each of the slider units 100, 200, 300, 400 for automatically moving the slider units 100, 200, 300, 400 to an original state in a direction away from the molding module 700 after the completion of the molding of the multi-curvature elastic member 40.

The reset unit 500 is composed of a reset plate 510, a reset bolt 520, and a reset elastic member 530. The reset plate 510 is fixed to the upward surface of the lower die plate mechanism 20, and has through holes parallel to the moving paths of the corresponding slider units 100, 200, 300, 400 (specifically, the first slider 120, the second slider 210 in the first slider unit 100, the second slider unit 200). The reset plate 510 may be formed as an L-shaped plate 30. The reset bolt 520 has a large head end and a threaded end opposite the large head end. The reset bolt 520 can pass through a through hole in the reset plate 510 and be fixed in a corresponding threaded hole of the slider unit (slider). A return elastic member 530 such as a spring is sleeved on the return bolt 520, and both ends thereof respectively abut against the head (large end) of the return bolt 520 and the return plate 510. When each slider unit 100, 200, 300, 400 is pressed against the sheet 30 on the forming module 700, the return spring 530 is placed in tension. When the slider units 100, 200, 300, 400 are at the initial positions, the return elastic member 530 is in a natural telescopic state. The return elastic member 530 is changed from a natural state to a pressed state in the course that the inclined wedges 11, 12, 13, 14 move downward to push the slider units 100, 200, 300, 400 toward the molding module 700. When the wedges 11, 12, 13, 14 are moved up, the return elastic member 530 is released from the pressed state, and each of the slider units 100, 200, 300, 400 is automatically restored to the original state.

The lower die plate mechanism 20 may further have a limit rail 600 in one-to-one correspondence with each of the slider units 100, 200, 300, 400 (specifically, the first slider 120, the second slider 210 in the first slider unit 100, the second slider unit 200). The curb rail 600 defines a path of travel of the slider unit. The curb rail 600 may be comprised of two curb bars secured to the upwardly facing surface of the lower template mechanism 20. The two limit bars define the moving track of the slider units 100, 200, 300, 400 (sliders 120, 210) on the upward-facing surface while preventing the slider units 100, 200, 300, 400 (sliders 120, 210) from being separated from the upward-facing surface. In the case where the above requirements are satisfied, the limit bar may be L-shaped as shown in fig. 4A to 4D, or may be other shapes, for example, a shape of the limit rail 600 having a dovetail groove may be defined.

Optionally, referring to fig. 3, a mold clamping stopper 15 is provided on the downward surface of the upper platen mechanism 10. The top surface of the clamp stopper 15 may be provided with a layer of cushioning material such as rubber. After the slider unit forms the multi-curvature elastic member 40, the mold clamping stopper 15 is abutted against the upward surface of the lower die plate mechanism 20, thereby preventing the upper die plate mechanism 10 from moving down too far. It will be appreciated that the clamp stop 15 may alternatively, or in combination, be provided on the upwardly facing surface of the lower platen mechanism 20.

Referring to fig. 2 in combination with fig. 3, in order to ensure that the inclined wedges 11, 12, 13, 14 can precisely move toward the corresponding slider units 100, 200, 300, 400 during the movement of the upper template mechanism 10 toward the lower template mechanism 20, the upper and lower template mechanisms 10, 20 are provided with the matched guide rods 21, guide sleeves 16.

The process of making the multi-curvature spring 40 is described below in conjunction with the figures, in which the sheet 30 is presented as a shaped multi-curvature spring 40 in fig. 5A-5D. See the process of fig. 9A-9C for a process in which sheet 30 is bent.

Step 1: as shown in fig. 5A, 9A, the sheet 30 is laid vertically on the forming die plate. Sheet 30 may be secured by a retaining clip (not shown) secured to lower die plate mechanism 20. The retaining clip may be any conventional clamping mechanism secured to the upwardly facing surface of lower template mechanism 20, such as a spring clip, threaded clamping device, or the like. It will be appreciated that the height of the retaining clip in the opposite vertical direction of the upper and lower template mechanisms 10, 20 should be such that it does not interfere with the movement of the respective slider units 100, 200, 300, 400.

Step 2: referring to fig. 5B and 9B, the upper die plate mechanism 10 is moved down so that the third slider unit 300 moves toward the forming die plate and bends both ends of the plate 30 toward the same side of the plate 30. In this step, the third inclined wedge contacts the third slider unit 300 at the first timing, and the third slider unit 300 moves directly toward the molding module 700. In this step, none of the first slider unit 100, the second slider unit 200, and the third slider unit 300 touches the corresponding slanted wedge.

Step 3: referring to fig. 5C and 9C, the upper die plate hook 10 is continuously moved down so that the first slider unit 100, the second slider unit 200, and the fourth slider unit 400 are moved together toward the forming module 700 to bend the plate material 30 into the multi-curvature elastic member 40. In this step, referring to fig. 5B, first, the first and second wedges 11, 12 abut against the respective sliders 120, 210 of the first and second slider units 100, 200, respectively. The first top block 110 of the first slider unit 100 is moved obliquely upward from the initial position of fig. 6A toward the molding module 700 by the power transmission action of the crank link to enter the state of fig. 6B. The general motion profile of the first top block 110 in this process can be seen by the left arrow in fig. 9C.

The second ejector block 220 of the second slider unit 200 is rotated by approximately 90 ° from the initial state of fig. 7A and 7B to the state of fig. 8A and 8B by the ejector pin 230, the stopper rod, the guide base 240, and the like, and then moves linearly toward the molding module 700. The movement trace of the second top block 220 can be seen in the right two arrows of fig. 9C.

The first and second slider units 100 and 200 may not start to move at the same time according to the shape of the bent portion formed by the first and second slider units 100 and 200 and the inclination angle of the corresponding wedge cone S1. When the first and second slider units 100, 200 will travel to complete their path of forming the corresponding bent portions 1, 2, 3, the fourth slider unit 400 starts to move toward the forming module 700. When the fourth slider unit 400 travels the moving path thereof, the first and second slider units 100 and 200 simultaneously travel the respective moving paths thereof. Sheet 30 is formed from the pattern of fig. 9B into the pattern of the semi-finished multi-curvature resilient member 40 of fig. 9C.

Step 4: referring to fig. 5D and 9D, the upper die plate mechanism 10 is further moved down so that the ejector pins 17 enter between the two sub-ejector blocks 110A, 110B of the first ejector block 110, and the two sub-ejector blocks 110A, 110B are rotated in a direction away from each other to press the sheet 30. Sheet 30 is thus formed from the pattern of fig. 9C into the pattern of finished multi-curvature resilient member 40 of fig. 9D. The movement trace of the two sub-top blocks 110A, 110B of the first top block 110 in this step can be seen by the arrows in the narrow mouth receiving cavity of the multi-curvature resilient member 40 corresponding to fig. 9D.

In the above description, the first top piece 110 is used to form two opposing first bent portions 1, 2. In fact, the semi-closed narrow mouth-shaped receiving cavity A2 of the multi-curvature elastic member 40 may be provided with more bending portions, which is only required to adaptively modify the shape of the sub-top blocks 110A, 110B of the first top block 110.

Further, it should be understood that the first slider unit 100 does not necessarily cooperate with the second slider unit 200, the third slider unit 300, and the fourth slider unit 400 of the form shown in fig. 4A to 8B in the arrangement direction of the above-described drawings. According to the inventive concept, the first slider unit 100 is not interfered by the small size of the narrow mouth-shaped receiving cavity A2, and it can cooperate with other forms, numbers of slider units in different or identical forms of the movement trajectories of the slider units shown in fig. 4A-8B to manufacture the multi-curvature elastic member 40 different from that shown in fig. 1.

To form the multi-curvature elastic member 40 having a greater number of narrow-mouth-shaped receiving chambers A2, a greater number of first slider units 100 may be provided on the lower die plate mechanism 20.

According to the above-described aspects of the present invention, the apparatus is capable of forming a multi-curvature elastic member having a narrow-mouth receiving chamber A2 at one time.

The scope of protection of the invention is limited only by the claims. Those skilled in the art, having the benefit of the teachings of this invention, will readily recognize alternative constructions to the disclosed structure as viable alternative embodiments, and the disclosed embodiments may be combined to create new embodiments that fall within the scope of the appended claims.

Reference numerals illustrate:

the upper template mechanism: 10.

lower template mechanism: 20.

sheet material: 30.

multi-curvature elastic member: 40.

a first bending part: 1. 2.

A second bending part: 3. 4, 5.

Inclined wedge block: 11. 12, 13, 14.

And (3) die closing limiting blocks: 15.

guide sleeve: 16.

ejector pin: 17.

guide rod: 21.

a first slider unit: 100.

a second slider unit: 200.

third slider unit: 300.

fourth slider unit: 400.

a reset unit: 500.

limit guide rail: 600.

first kicking block: 110.

first slider: 120.

a first connecting rod: 130.

a second connecting rod: 140.

a third connecting rod: 150.

and a second slide block: 210.

the second top block: 220.

pushing block: 230.

and (3) guiding a base: 240.

reset plate: 510.

reset bolt: 520.

reset elastic piece: 530.

Claims

1. an apparatus for processing a multi-curvature elastic member including a plurality of first bending portions capable of collectively defining a narrow-mouth-shaped accommodation chamber and second bending portions spaced apart from the first bending portions, the first and second bending portions being capable of mutually surrounding to form an inner space, the apparatus comprising:

an upper template mechanism, wherein a plurality of inclined wedges extending downwards are arranged on the downward surface of the upper template mechanism, and each of the inclined wedges is positioned to correspond to at least one of the first bending parts and the second bending parts; and

a lower die plate mechanism disposed below the upper die plate mechanism, wherein an upward surface of the lower die plate mechanism facing the upper die plate mechanism is provided with:

a molding module configured such that an outer shape thereof matches a shape of the inner space; and

the slide block units are arranged in one-to-one correspondence with the inclined wedges, each slide block unit is constructed to be pushed by the inclined wedges to move towards the forming module along the upward surface of the lower template mechanism when the upper template mechanism and the lower template mechanism relatively move, and cooperate with the forming module to form a plate into the multi-curvature elastic piece,

the sliding block unit comprises at least one first sliding block unit, wherein the first sliding block unit comprises a first top block, the shape of the first top block is matched with that of at least two first bending parts, the first top block is configured to move towards the forming module along the direction forming an angle with the upward surface of the lower template mechanism under the action of corresponding inclined wedges, and the first top block can be matched with the forming module and adjacent sliding block units at the same time to form the at least two first bending parts.

2. The apparatus of claim 1, wherein the first slider unit further comprises:

a first slider; and

and the crank connecting rod mechanism is respectively and rotatably connected with the first sliding block and the first top block and is configured to enable the first top block to move upwards or downwards along with the movement of the first sliding block so as to form a plurality of first bending parts.

3. The apparatus according to claim 2, wherein the first top block comprises two sub-top plates rotatably fixed to an end of the crank-link mechanism facing the forming module, the two sub-top plates being disposed opposite each other, each sub-top plate being provided with a forming protrusion for forming the first bending portion;

the downward surface of the upper template mechanism also comprises a thimble,

when the first ejector block moves upwards or downwards and abuts against the plate, the ejector pin can penetrate between the two sub-top plates, so that the two sub-top plates rotate in the direction away from each other and press the plate.

4. The apparatus of claim 3, wherein the crank link mechanism comprises a first link, a second link, and a third link, wherein both ends of the first link are rotatably connected to one ends of the first slider and the second link, respectively, and the other end of the second link is connected to the first top block, and both ends of the third link are rotatably connected to a side surface of the second link and the upward facing surface, respectively.

5. The apparatus of any one of claims 1-4, wherein the slider unit comprises a second slider unit comprising:

a second slider;

the second top block is provided with a pushing surface matched with the shape of the second bending part; and

the two ends of the pushing rod are respectively fixed on the second sliding block and the second pushing block in a rotating mode, and the pushing rod can move towards the forming module along a preset track under the action of the second sliding block.

6. The apparatus of claim 5, wherein the second slider unit further comprises a guide mechanism comprising:

a limit rod extending downwards from the lower surface of the second top block; and

the guide base is provided with a guide groove for accommodating and guiding the limiting rod to move;

when the limiting rod moves along the guide groove, the guide groove can guide the second top block to move forward and rotate, so that the second top block forms the second bending part.

7. The apparatus of claim 6, wherein the slider unit comprises a third slider unit configured to be capable of bending both ends of the plate material toward the same side of the plate material.

8. The apparatus of claim 7, wherein the slider unit includes a fourth slider unit disposed opposite the third slider unit, the fourth slider unit being configured to be capable of bending both end portions of the plate material into first and second bending portions, respectively, in a substantially semicircular configuration in conjunction with the first and second top pieces.

9. The apparatus of claim 8, wherein the second, third, and fourth slider units are positioned to be simultaneously movable to an end of a travel path.

10. The apparatus according to claim 1, wherein the lower die plate mechanism further includes a reset unit in one-to-one correspondence with each of the slider units, the reset unit being configured to automatically move the slider units to an original state in a direction away from the molding module.

11. The apparatus of claim 10, wherein the reset unit comprises:

a reset plate fixed to the upward facing surface and having a through hole parallel to a corresponding moving path of the slider unit;

the reset bolt can penetrate through the through hole and is fixed on the sliding block unit; and

the reset elastic piece can be respectively abutted with the head part of the reset bolt and the reset plate,

wherein the return spring is configured to be in tension when the slider unit is against a sheet material located on the forming module.

12. The apparatus of claim 1, wherein the lower die plate mechanism further comprises a limit rail in one-to-one correspondence with each slider unit, the limit rail defining a path of movement of the slider unit.

13. A method of manufacturing a multi-curvature elastic member using the apparatus of any one of claims 1-12, the method comprising the steps of:

vertically laying the sheet on the forming module;

the upper template mechanism is moved downwards and/or the lower template mechanism is moved upwards, so that the third sliding block unit moves towards the forming module and bends the two ends of the plate towards the same side of the plate;

14. The method of claim 13, wherein each of the slides of the second, third and fourth slide units complete movement at the same time in the step of continuing to move the upper template mechanism downward and/or move the lower template mechanism upward.

15. The method of claim 14, wherein in the bending the multi-curvature resilient member step, each of the second, third and fourth slider units starts to move at different times.