Horizontal shear forming compound die for knife sheath hoop

Abstract

The present application relates to the field of mechanical parts shearing equipment, and discloses a horizontal shearing and forming compound die for a sheath clamp, which comprises a surplus material punching and bending unit between an upper bottom plate and a lower bottom plate, the surplus material punching and bending unit comprises a trimming punch, a trimming die matched with the trimming punch, a sliding plate and a wedge plate providing a vertical and synchronous horizontal movement cavity for the sliding plate, the upper side of the sliding plate is fixedly connected with the trimming punch, the trimming die is fixedly connected with the upper bottom plate, the wedge plate is fixedly connected with the upper surface of the lower bottom plate, and a back-moving part for driving the back movement of the sliding plate is arranged between the sliding plate and the upper surface of the wedge plate; a cutting edge for cutting off the surplus material at the upper flange of the clamp blank is arranged on the side of the trimming die close to the trimming punch, and a bending cavity abutting against the top of the flange is arranged on the lower side of the trimming die. The present application can complete the punching and cutting of the surplus material of the clamp blank and the bending of the flange at one time, can effectively reduce the use of multiple types of molds, and can reduce the processing equipment cost of the clamp.

Description

Technical Field

[0001] This invention relates to the field of mechanical parts shearing equipment, and more particularly to a composite mold for horizontal shearing and forming of blade sheath clamps. Background Technology

[0002] The bayonet sheath has an insertion port at its end for inserting the bayonet. A device is coaxially fixed at the insertion port of the bayonet sheath, as shown in the instruction manual (view from top). Figure 1 The clamp shown has a first mounting hole for connecting to the bayonet sheath and a second mounting hole for connecting to the bayonet handle. The second mounting hole is located on the flange of the clamp, which allows the flange of the clamp to extend to the outside of the bayonet sheath. The second mounting hole is opposite to the handle, and the end of the flange away from the clamp is inclined away from the center of the clamp's cross-section to avoid interference between the bayonet and the flange.

[0003] As can be seen from the above, the structure of the clamp is more complex than that of conventional sheet metal parts that are bent or punched in a single operation. When processing the flange on the clamp, the clamp blank needs to be placed on the first mold first. The first mold cuts off the excess material at the flange of the clamp blank and then takes out the rough clamp blank. Then, the second mold is used to bend the flange of the rough clamp blank at an angle. In the above processing, the corresponding clamp blank or rough clamp blank needs to be picked up and put down frequently, resulting in low production efficiency of the clamp. At the same time, several different processing molds need to be used in the above process, which also results in high processing cost of the clamp. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a composite mold for horizontal shearing and forming of blade sheath clamps, which solves the problem that two processing molds are generally used when shearing and bending clamps, resulting in high processing costs and low processing efficiency.

[0005] To achieve the above objectives, the basic solution of the present invention is as follows: a horizontal shearing forming composite mold for a knife sheath clamp, comprising a mold handle detachably connected to a press, an upper base plate, and a lower base plate, wherein the mold handle can push the upper base plate vertically close to the lower base plate, and further comprising:

[0006] The blanking and bending unit is located between the upper base plate and the lower base plate. The blanking and bending unit includes a cutting punch, a cutting die that cooperates with the cutting punch, a slide plate, and a wedge plate that provides a vertical and synchronously horizontally moving cavity for the slide plate. The upper side of the slide plate is fixedly connected to the cutting punch, the cutting die is fixedly connected to the upper base plate, and the wedge plate is fixedly connected to the upper surface of the lower base plate. A return part is provided between the upper surface of the slide plate and the wedge plate to drive the slide plate to return.

[0007] The trimming die has a cutting edge on the side near the trimming punch to remove excess material from the flange of the clamp blank, and a bending cavity on the lower side of the trimming die that can abut against the top of the flange.

[0008] The technical principle of this invention is as follows: Before processing the clamp blank, the press drives the upper base plate and guide cylinder to the top of the guide post via the die handle. At this time, the trimming punch and trimming die are separated. Then, the clamp blank is placed on the trimming punch, with the inner wall of the clamp blank fitting against the outer wall of the trimming punch. Then, the press controls the die handle to push the upper base plate downward, and the upper base plate drives the trimming die to move downward simultaneously and press against the trimming punch, so that the clamp blank is initially clamped between the trimming die and the trimming punch. When the trimming die continues to move downward, the trimming punch pushes the slide plate to move vertically along the inclined wedge plate. Supported by the wedge plate, the cutting edge on the trimming die punches the excess material on the clamp blank. At the same time, the slide plate moves horizontally forward synchronously on the wedge plate. At this time, the trimming punch moves the flange on the clamp blank into the bending cavity. The trimming die presses the flange against the inner wall of the bending cavity. When the slide plate moves horizontally in the opposite direction, the bending cavity presses the flange against the flange. The clamp blank moves in the opposite direction under the action of the trimming punch, thus bending the flange. After a single clamp blank is processed, the return section controls the slide plate and the trimming punch to move back to the upper side of the wedge plate, which is convenient for the production of the next clamp.

[0009] Through the above process, the blanking of the clamp blank and the bending of the flange can be completed in one go, which can effectively reduce the use of multiple types of molds and reduce the processing equipment cost of the clamp. At the same time, the cutting and bending of the clamp blank can be completed in one go during the sliding plate and the cutting punch, which has high processing efficiency for the two processing steps, can shorten the processing cycle required for a single clamp, reduce its processing cost, and facilitate efficient mass production.

[0010] Furthermore, a first ejection cavity is vertically provided at the center of the cutting edge of the trimming die, and a second ejection cavity is provided on the upper base plate, which is vertically connected to the ejection cavity. A compression spring and an ejection core are arranged sequentially from top to bottom in the second ejection cavity and the first ejection cavity. The upper end of the compression spring is fixedly connected to the die handle or the upper base plate, and the lower end of the compression spring is fixedly connected to the upper end of the ejection core. The lower end of the ejection core abuts against the upper end of the trimming punch.

[0011] With the above settings, when the trimming die initially fits onto the trimming punch, the clamp blank can be inserted into the first ejection cavity, which facilitates stable positioning of the clamp blank. When the clamp blank is processed and the slide plate moves upward, the compression springs in the second ejection cavity and the first ejection cavity are automatically released, causing the ejection core to move downward and push the clamp and excess material to separate from the first ejection cavity, which facilitates efficient removal of the processed clamp and excess material.

[0012] Furthermore, there are two wedges, and each of the two wedges has several wedge surfaces on the side near the slide. A vertical surface is provided between two adjacent wedge surfaces. The wedge surfaces on the two wedges are arranged in a one-to-one correspondence, and the wedge surface on one of the wedges is parallel to the corresponding wedge surface on the other wedge. The side wall of the slide is in sliding contact with the wedge surfaces of the two wedges.

[0013] With the above configuration, the wedge plate can accurately guide the up and down movement of the slide plate, making it easy for the slide plate to cooperate with several wedge surfaces. This allows the slide plate to move horizontally while moving downwards. The wedge surfaces can support the cutting of the clamp blank between the cutting die and the cutting punch, and can also cooperate with the bending cavity of the cutting die to bend the flange. At the same time, it makes the up and down movement of the slide plate along the wedge surface convenient and reliable.

[0014] Furthermore, the return section includes an elastic material guard plate, several limiting screws, and a spring coaxially sleeved on the limiting screws. The elastic material guard plate is horizontally fixed between two inclined wedge plates. The elastic material guard plate is provided with a machining hole for the cutting punch to pass through. The sliding plate is located on the lower side of the elastic material guard plate and can abut against the elastic material guard plate. The limiting screws pass vertically through the sliding plate and the spring and are threadedly connected to the elastic material guard plate. The upper end of the spring is fixedly connected to the lower surface of the elastic material guard plate, and the lower end of the spring is fixedly connected to the upper surface of the sliding plate.

[0015] With the above configuration, the elastic material guard plate can support the up and down movement of the slide plate and the cutting punch. At the same time, the limit screw can provide stable guidance for the up and down movement of the slide plate and the cutting punch. The spring can cooperate with the elastic material guard plate to drive the slide plate and the cutting punch to move back, which is convenient for processing the next clamp blank.

[0016] Furthermore, it also includes several limiting posts. The lower end of the limiting post abuts against the upper surface of the slide plate. The upper end of the limiting post passes through the elastic protective frame plate and the cutting die in sequence and is fixedly connected to the upper base plate. A limiting hole is formed at the passage of the limiting post through the elastic protective frame plate. The limiting hole and the limiting post are clearance-fitted. The width of the line connecting two adjacent wedge surfaces between the limiting hole and the outer wall of the limiting post is greater than or equal to the maximum displacement formed when the flange is bent.

[0017] With the above settings, when the limiting post moves down under the drive of the upper base plate, the limiting post moves down and passes through the limiting hole of the elastic protective frame plate and abuts against the upper surface of the slide plate. At this time, the upper base plate pushes the cutting die to initially fit with the clamp blank on the cutting punch, and then pushes the cutting punch to move down stably and in a balanced manner.

[0018] Furthermore, each of the inclined wedge plates has a stop surface on the side near the slide plate that can abut against the upper surface of the slide plate. When the upper surface of the slide plate abuts against the stop surface, the lower surface of the slide plate abuts against the lower surface of the elastic protective frame plate.

[0019] With the above settings, when the slide plate moves up to the upper side of the wedge plate, the slide plate can stably abut against the stop surface on the wedge plate, thereby achieving stable positioning of the slide plate and facilitating control of the relative position of the slide plate and the elastic protective frame plate.

[0020] Furthermore, a guide post and a guide cylinder are vertically installed between the upper base plate and the lower base plate. The guide cylinder is vertically slidably installed outside the guide post. The upper end of the guide cylinder is fixedly connected to the upper base plate, and the lower end of the guide post is fixedly connected to the lower base plate.

[0021] With the above configuration, the guide column and guide cylinder can guide the up and down movement of the upper base plate, making the movement of the upper base plate more stable and reliable.

[0022] Furthermore, a gap is formed between the limiting screw and the slide plate, and the average width of the gap in the cross-sectional direction is greater than or equal to the maximum displacement formed when the flange is bent.

[0023] The above settings provide space for the horizontal movement of the slide plate, facilitating accurate bending of the flange on the clamp blank.

[0024] Furthermore, the upper surface of the skateboard is provided with a groove for the lower end of the spring to be inserted.

[0025] With the above settings, the spring can stably drive the slide plate to move up and down along the limit screw. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the clamp blank and the clamp axial direction in the background art.

[0027] Figure 2 This is an isometric schematic diagram of the composite mold for horizontal shearing and forming of the sheath clamp in an embodiment of the present invention.

[0028] Figure 3 for Figure 2 A top view of the composite mold for horizontal shearing and forming of the sheath clamp.

[0029] Figure 4 for Figure 3 Sectional view at point AA.

[0030] In the above figures: clamp blank 1, clamp 2, flange 3, first mounting hole 10, second mounting hole 20, mold handle 30, upper base plate 301, second ejection cavity 311, compression spring 312, limiting post 302, guide post 401, guide cylinder 402, trimming die 403, first ejection cavity 413, ejection core 423, lower base plate 50, trimming punch 60, sliding plate 601, inclined wedge plate 602, first wedge surface 612, second wedge surface 622, elastic material protection frame plate 603, limiting hole 613, limiting screw 604, spring 605. Detailed Implementation

[0031] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0032] This embodiment is basically as follows: Figure 2 , Figure 3 and Figure 4 As shown, this embodiment of the invention proposes a horizontal shearing forming composite mold for a sheath clamp 2, including a mold handle 30 detachably connected to a press, an upper base plate 301, a lower base plate 50, and a scrap material punching and bending unit located between the upper base plate 301 and the lower base plate 50. The mold handle 30 can push the upper base plate 301 vertically close to the lower base plate 50. Two guide pillars 401 and two guide cylinders 402 are vertically installed between the upper base plate 301 and the lower base plate 50. The two guide pillars 401 and two guide cylinders 402 are evenly arranged between the upper base plate 301 and the lower base plate 50. The guide cylinders 402 are vertically slidably installed outside the guide pillars 401. The upper end of the guide cylinder 402 is welded to the upper base plate 301, and the lower end of the guide pillar 401 is welded to the lower base plate 50.

[0033] like Figure 4 As shown, the excess material punching and bending unit includes a trimming punch 60, a trimming die 403 that mates with the trimming punch 60, a slide plate 601, and a wedge plate 602 that provides a vertical and synchronously horizontally moving cavity for the slide plate 601. The upper side of the slide plate 601 is fixedly connected to the lower end of the trimming punch 60, and the trimming die 403 is fixedly connected to the upper base plate 301. The lower side of the trimming die 403 is provided with a cutting edge for removing excess material from the flange 3 of the clamp blank 1. A first ejection cavity 413 is vertically and coaxially arranged at the center of the cutting edge of the trimming die 403. The upper base plate 301 is provided with... The second ejection cavity 311 is vertically connected to the ejection cavity. The second ejection cavity 311 and the first ejection cavity 413 are provided with a compression spring 312 and an ejection core 423 from top to bottom. The upper end of the compression spring 312 is fixedly connected to the mold handle 30 or the upper base plate 301, and the lower end of the compression spring 312 is fixedly connected to the upper end of the ejection core 423. The lower end of the ejection core 423 abuts against the upper end of the trimming punch 60. A bending cavity is provided on the lower right side of the trimming die 403, which can abut against the top of the flange 3. The bending cavity is connected to the first ejection cavity 413 and is located on the right side of the first ejection cavity 413.

[0034] like Figure 4As shown, there are two wedge plates 602, which are arranged opposite each other and are fixedly connected to the upper surfaces of the left and right sides of the lower base plate 50 by bolts. A return part is provided between the upper surface of the slide plate 601 and the wedge plate 602 to drive the slide plate 601 to move back. The two wedge plates 602 are located on one side of the slide plate 601 and are provided with a first wedge surface 612 and a second wedge surface 622 from top to bottom. A vertical surface is provided between the first wedge surface 612 and the second wedge surface 622. The first wedge surface 612 on the two wedge plates 602 is located on the same horizontal plane, and the second wedge surface 622 on the two wedge plates 602 is also located on the same horizontal plane. Furthermore, the first wedge surface 612 on the left wedge plate 602 is parallel to the first wedge surface 612 on the right wedge plate 602, and the second wedge surface 622 on the left wedge plate 602 is parallel to the second wedge surface 622 on the right wedge plate 602. The lower side of the first wedge surface 612 is inclined towards the center of the cutting punch 60, and the lower side of the second wedge surface 622 is inclined away from the center of the cutting punch 60. The side wall of the slide plate 601 is in sliding contact with the first wedge surface 612, the vertical surface and the second wedge surface 622 of the two wedge plates 602. The upper and lower edges of the left and right ends of the slide plate 601 are inclined surfaces that can fit with the first wedge surface 612 or the second wedge surface 622.

[0035] like Figure 4 As shown, the return section includes an elastic material guide frame plate 603, two limiting screws 604, four limiting posts 302, and a spring 605 coaxially sleeved on the limiting screws 604. The elastic material guide frame plate 603 is horizontally fixed between two inclined wedge plates 602. The elastic material guide frame plate 603 is provided with a machining hole for the cutting punch 60 to pass through. The sliding plate 601 is located below the elastic material guide frame plate 603 and can abut against the elastic material guide frame plate 603. The limiting screws 604 vertically pass through the sliding plate 601 and the spring 605. 5. It is threadedly connected to the elastic protective frame plate 603. The upper end of the spring 605 is welded to the lower surface of the elastic protective frame plate 603. The upper surface of the slide plate 601 is provided with a groove for the lower end of the spring 605 to be inserted. The lower end of the spring 605 is welded to the inner wall of the groove of the slide plate 601. At the same time, the upper side of the inclined wedge plate 602 is provided with a stop surface that can abut against the upper surface of the slide plate 601. When the upper surface of the slide plate 601 abuts against the stop surface, the lower surface of the slide plate 601 abuts against the lower surface of the elastic protective frame plate 603.

[0036] At the same time, such as Figure 4As shown, the lower end of the limiting post 302 abuts against the upper surface of the slide plate 601. The upper end of the limiting post 302 passes through the elastic protective frame plate 603 and the trimming die 403 in sequence and is then fixedly connected to the upper base plate 301 by bolts. A limiting hole 613 is formed at the passage of the limiting post 302 through the elastic protective frame plate 603. The limiting hole 613 and the limiting post 302 are clearance-fitted. The width of the line connecting two adjacent wedge surfaces between the limiting hole 613 and the outer wall of the limiting post 302 is greater than or equal to the maximum displacement formed when the flange 3 is bent. A gap is formed between the limiting screw 604 and the slide plate 601. The average width of the gap in the cross-sectional direction is greater than or equal to the maximum displacement formed when the flange 3 is bent.

[0037] In this embodiment, when the horizontal shearing forming composite mold of the sheath clamp 2 is not in use, the press drives the upper base plate 301 and the guide cylinder 402 to the top of the guide column 401 through the mold handle 30. At this time, the trimming punch 60 and the trimming die 403 are separated. Then, the clamp blank 1 is placed on the trimming punch 60, and the inner wall of the clamp blank 1 is in contact with the outer wall of the trimming punch 60.

[0038] Then, the press control handle 30 pushes the upper base plate 301 and guide cylinder 402 downward along the guide post 401. The upper base plate 301 drives the trimming die 403 and the limiting post 302 to move downward simultaneously. The limiting post 302 moves downward and passes through the limiting hole 613 of the elastic material protection frame plate 603, and then abuts against the upper surface of the slide plate 601. At this time, the upper base plate 301 pushes the trimming die 403 to initially fit against the clamp blank 1 on the trimming punch 60. When the upper base plate 301 continues to push the trimming die 403 downward, the side walls on both sides of the slide plate 601 separate from the stop surface under the push of the limiting post 302. At this time, the first ejection cavity 413 on the trimming die 403 will fit the clamp blank 1 and make it enter the first ejection cavity 413. Then the upper base plate 301 continues to push the trimming die 403 downward. Since the sidewall of the slide plate 601 is attached to the first wedge surface 612, the slide plate 601 moves horizontally while sliding vertically during this process. The clearance fit between the limiting hole 613 and the limiting post 302, as well as the clearance fit between the limiting screw 604 and the slide plate 601, allows the slide plate 601 to drive the trimming punch 60 to slide to the right relative to the trimming die 403, thereby achieving horizontal shearing stamping. At this time, the top surface of the bending cavity can abut against the top of the flange 3 of the clamp blank 1. When the slide plate 601 slides to the second wedge surface 622, the slide plate 601 drives the trimming punch 60 and the clamp blank 1 to move to the left. At this time, since the top of the flange 3 abuts against the bending cavity, the flange 3 can be bent relative to the annular part at the lower end of the clamp blank 1, achieving the effect of bending and forming.

[0039] After the clamp 2 is formed, the press drives the die handle 30 to move upward. Simultaneously, the die handle 30 drives the trimming die 403 and the limiting post 302 to move upward. At this time, the limiting post 302 loosens the slide plate 601. Under the tension of the spring 605, the slide plate 601 moves upward between the limiting screw 604 and the two inclined wedge plates 602. The upper end of the trimming punch 60 moves back to the upper side of the elastic material protection frame plate 603. During this process, the elastic force of the compression spring 312 also acts on the ejector core 423. The ejector core 423 pushes the clamp 2 and the excess material to leave the first ejector cavity 413, so that the clamp 2 and the excess material are finally located on the elastic material protection frame plate 603, which makes it easy to remove the clamp 2 and the excess material.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A composite mold for horizontal shearing and forming of a knife sheath clamp, comprising a mold handle detachably connected to a press, an upper base plate, and a lower base plate, wherein the mold handle can push the upper base plate vertically close to the lower base plate, characterized in that, Also includes: The blanking and bending unit for scrap material located between the upper base plate and the lower base plate includes a cutting punch, a cutting die that cooperates with the cutting punch, a slide plate, and a wedge plate that provides a vertical and synchronously horizontally moving cavity for the slide plate. The upper side of the slide plate is fixedly connected to the cutting punch, the cutting die is fixedly connected to the upper base plate, and the wedge plate is fixedly connected to the upper surface of the lower base plate. A return part is provided between the upper surface of the slide plate and the wedge plate to drive the slide plate to return. The cutting die is provided with a cutting blade on the side near the cutting punch to remove excess material from the flange of the clamp blank, and a bending cavity is provided on the lower side of the cutting die to abut against the top of the flange. The inclined wedge plate is located on one side of the slide plate and has a first wedge surface and a second wedge surface in sequence from top to bottom; the lower side of the first wedge surface is inclined towards the center of the cutting punch, and the lower side of the second wedge surface is inclined away from the center of the cutting punch. The return section includes an elastic material guard plate, two limiting screws, four limiting posts, and a spring coaxially sleeved on the limiting screws. The elastic material guard plate is horizontally fixed between two inclined wedge plates. The elastic material guard plate has a machining hole for the cutting punch to pass through. The sliding plate is located on the lower side of the elastic material guard plate. The limiting screws pass vertically through the sliding plate and the spring and are threadedly connected to the elastic material guard plate. The upper end of the spring is welded to the lower surface of the elastic material guard plate; the lower end of the spring is welded to the inner wall of the groove of the sliding plate. It also includes several limiting posts. The lower end of the limiting post abuts against the upper surface of the slide plate. The upper end of the limiting post passes through the elastic protective frame plate and the cutting die in sequence and is fixedly connected to the upper base plate by bolts. A limiting hole is formed at the passage of the limiting post through the elastic protective frame plate. The limiting hole and the limiting post are clearance fit. The width of the line connecting two adjacent wedge surfaces between the limiting hole and the outer wall of the limiting post is greater than or equal to the maximum displacement formed when the flange is bent. A gap is formed between the limit screw and the slide plate, and the average width of the gap in the cross-sectional direction is greater than or equal to the maximum displacement formed when the flange is bent. The number of the inclined wedges is two, and each of the two inclined wedges has several wedge surfaces on the side near the slide plate. A vertical surface is provided between two adjacent wedge surfaces. The wedge surfaces on the two inclined wedges are arranged in a one-to-one correspondence, and the wedge surface on one of the inclined wedges is parallel to the corresponding wedge surface on the other inclined wedge. The side wall of the slide plate is in sliding contact with the wedge surfaces of the two inclined wedges.

2. The composite mold for horizontal shearing and forming of the knife sheath clamp as described in claim 1, characterized in that, The cutting edge of the cutting die is vertically provided at the center of the first ejection cavity, and the upper base plate is provided with a second ejection cavity that is vertically connected to the ejection cavity. The second ejection cavity and the first ejection cavity are provided with a compression spring and an ejection core from top to bottom. The upper end of the compression spring is fixedly connected to the die handle or the upper base plate, and the lower end of the compression spring is fixedly connected to the upper end of the ejection core. The lower end of the ejection core abuts against the upper end of the cutting edge punch.

3. The composite mold for horizontal shearing and forming of the knife sheath clamp as described in claim 2, characterized in that, Each of the inclined wedge plates has a stop surface on the side near the slide plate that can abut against the upper surface of the slide plate. When the upper surface of the slide plate abuts against the stop surface, the lower surface of the slide plate abuts against the lower surface of the elastic protective frame plate.

4. The composite mold for horizontal shearing and forming of the knife sheath clamp as described in claim 3, characterized in that, A guide post and a guide cylinder are vertically installed between the upper base plate and the lower base plate. The guide cylinder is vertically slidably installed outside the guide post. The upper end of the guide cylinder is fixedly connected to the upper base plate, and the lower end of the guide post is fixedly connected to the lower base plate.

5. The composite mold for horizontal shearing and forming of the knife sheath clamp as described in claim 4, characterized in that, The upper surface of the slide plate is provided with a groove for the lower end of the spring to be inserted.

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