Synthetic brake shoe back plate positioning groove shearing forming die

Abstract

The utility model discloses a kind of synthetic brake shoe shoe back positioning slot shearing forming die, including upper die, lower die, upper die includes the upper die plate and two upper die fixed plate connected, lower die includes the lower die plate and two lower die seat connected;Upper die fixed plate is solidly provided with forming upper die core, two shearing upper dies located in the front and rear side of forming upper die core;Lower die plate is equipped with horizontal through slot, horizontal through slot is equipped with elastic element, and material withdrawal plate is placed on elastic element;Two lower die seats are solidly connected with lower die fixed sleeve, lower die fixed sleeve is equipped with horizontal positioning slot, lower die fixed sleeve is equipped with lower die and lower die core placed in lower die;Each group of lower die seat and lower die correspond two thimbles, two thimbles are longitudinally through lower die seat and lower die, and its lower end is in contact with material withdrawal plate;Positioning pin is solidly arranged on lower die plate between two lower die seats.The utility model has the advantages of high processing efficiency, easy to demould, and high positioning accuracy, can ensure product processing quality.

Description

Technical Field

[0001] This utility model relates to a shearing forming mold for the positioning groove of the back of a synthetic brake shoe, particularly a shearing forming mold for the positioning groove of the back of a synthetic brake shoe used in railway locomotives. Background Technology

[0002] like Figure 1 , Figure 2 As shown, the structure of the two ends of the composite brake shoe back 21 for railway locomotives is relatively complex. It is necessary to cut and bend the two ends and the front and rear sides 22 of each end, and to make staggered bending in the middle 23 of each end to form the brake shoe positioning groove 24 so as to connect with the brake shoe support. Existing molds are not suitable for this product, and the bending and forming areas at both ends are large, making demolding difficult. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned shortcomings of the existing technology by providing a synthetic brake shoe back positioning groove shearing forming mold, which has the advantages of high processing efficiency, easy demolding, and high positioning accuracy, thus ensuring product processing quality.

[0004] To achieve the above objectives, the present invention provides a synthetic brake shoe back positioning groove shearing forming mold, comprising an upper mold and a lower mold. The upper mold includes a connected upper template and two upper mold fixing plates, and the lower mold includes a connected lower template and two lower mold bases. The upper mold fixing plates are characterized by each having a forming upper mold core and two shearing upper molds located on the front and rear sides of the forming upper mold core. The lower template has a transverse through groove, within which are elastic elements and a ejector plate placed on the elastic elements. Each of the two lower mold bases is fixedly connected to a lower mold fixing sleeve, each lower mold fixing sleeve having a transverse positioning groove. Each lower mold fixing sleeve contains a lower mold and a lower mold core placed within the lower mold. The lower mold has a forming cavity, and the outer section of the forming upper mold core has a pressure head. The outer section of the lower mold core has a curved surface that mates with the pressure head. Each set of lower mold bases and lower molds corresponds to two ejector pins, located directly below the two shearing upper molds. The two ejector pins longitudinally pass through the lower mold base and lower mold, with their lower ends contacting the ejector plate. A positioning pin is fixedly provided on the lower template between the two lower mold bases.

[0005] In use, both ends of the workpiece are placed in the positioning grooves of the two lower die fixing sleeves, and the positioning pins pass through the center hole of the workpiece to achieve positioning. When the upper die moves downward, the two shearing upper dies cooperate with the lower die core to achieve shearing on the front and back sides of each end, and cooperate with the lower die to bend and form, while pushing the two ejector pins and the ejector plate downward to squeeze the elastic element to shrink. At the same time, the forming upper die core cooperates with the lower die core to complete the staggered bending and forming of the middle of each end. When the upper die returns, the elastic element resets, and the ejector plate pushes the four ejector pins upward at the same time to demold both ends of the workpiece simultaneously. This utility model can process and demold both ends of the workpiece at the same time, with the advantages of high processing efficiency, easy demolding, high positioning accuracy, and can ensure the symmetry of the product and the processing quality of the product.

[0006] As a further improvement of this utility model, the above-mentioned elastic element can be a rubber pad or a spring; As a further improvement of this utility model, the positioning pin is fixed to the lower template by a positioning pin seat, and the positioning pin seat is fixedly connected to the lower template; this facilitates the installation and replacement of the positioning pin. As a further improvement of this utility model, each of the lower mold fixing sleeves is provided with a set screw that contacts the lower mold; it can lock the cylindrical lower mold, which facilitates the manufacturing of the lower mold and ensures the product processing quality. In summary, this utility model has the advantages of high processing efficiency, easy demolding, and high positioning accuracy, which can ensure the processing quality of the product. Attached Figure Description

[0007] Figure 1 This is a front view of the back of a composite brake shoe for railway locomotives.

[0008] Figure 2 for Figure 1 AA sectional view.

[0009] Figure 3 This is a front view of an embodiment of the present utility model.

[0010] Figure 4 for Figure 3 BB cross-sectional view. Detailed Implementation

[0011] The present invention will now be described in further detail with reference to the accompanying drawings.

[0012] like Figures 3 to 4 As shown, the synthetic brake shoe back positioning groove shearing forming mold of this embodiment includes an upper mold and a lower mold. The upper mold includes an upper template 1 connected by bolts and two upper mold fixing plates 2. A forming upper mold core 3 and two shearing upper molds 4 located on the front and rear sides of the forming upper mold core 3 are fixedly mounted in the upper mold fixing plates 2 via interlocking steps. The lower mold includes a lower template 5 connected by bolts and two lower mold bases 6. The lower template 5 has a transverse through groove, and a rubber pad 7 and a material ejection plate 8 placed on the rubber pad are provided in the transverse through groove. Both lower mold bases 6 are fixedly connected to lower mold fixing sleeves 9 by bolts. Each lower mold fixing sleeve 9 has a transverse positioning groove 10. Each lower mold fixing sleeve 9 has a transverse positioning groove 10. The system includes a cylindrical lower mold 11 and a lower mold core 12 placed within the lower mold 11. The lower mold fixing sleeve 9 is threaded with set screws 14 that contact the lower mold. The lower mold 12 has a forming cavity. The outer section of the forming upper mold core 3 is provided with a pressure head 13. The outer section of the lower mold core 12 is provided with a curved surface that mates with the pressure head. Each set of lower mold bases 6 and lower molds 11 corresponds to two ejector pins 15. The two ejector pins 15 are located directly below the two shearing upper molds 4. The two ejector pins 15 pass longitudinally through the lower mold bases 6 and lower molds 11, and their lower ends contact the ejector plate 8. A positioning pin seat 16 is fixed on the lower template 5 between the two lower mold bases 6. The positioning pin seat 16 is provided with a positioning pin 17.

[0013] In use, the upper template 1 is connected to the slider of the press, and the lower template 5 is fixed on the worktable of the press. The two ends of the workpiece 18 are placed in the positioning grooves 10 of the two lower mold fixing sleeves 9, and the positioning pins 17 pass through the center hole of the workpiece 18 to achieve positioning. When the slider drives the upper template 1 to move downward, the two shearing upper molds 4 cooperate with the lower mold core 12 to achieve shearing of the front and rear sides of each end of the workpiece, and cooperate with the lower mold 11 to bend and form, and push the two ejector pins 15 and the ejector plate 8 downward to squeeze the rubber pad 7 to shrink. At the same time, the forming upper mold core 3 cooperates with the lower mold core 12 to complete the staggered bending and forming of the middle of each end. When the upper mold returns, the rubber pad 7 is reset, and the ejector plate 8 pushes the four ejector pins 15 upward at the same time to demold both ends of the workpiece 18. This utility model can process and demold both ends of the workpiece at the same time, and has the advantages of high processing efficiency, easy demolding, high positioning accuracy, and can ensure the symmetry of the product and ensure the processing quality of the product.

[0014] The rubber pad 7 can also be replaced by a spring; The set screw 14 can lock the cylindrical lower mold 11, which facilitates the manufacturing of the lower mold and prevents the lower mold 11 from rotating and causing displacement, thus ensuring the quality of product processing; the locating pin seat 16 facilitates the installation and replacement of the locating pin 17, improving versatility.

Claims

1. A shearing and forming mold for a synthetic brake shoe back positioning groove, comprising an upper mold and a lower mold, the upper mold comprising a connected upper template and two upper mold fixing plates, and the lower mold comprising a connected lower template and two lower mold bases; characterized in that... The upper mold fixing plate is fixedly equipped with a forming upper mold core and two shearing upper molds located on the front and rear sides of the forming upper mold core; the lower mold plate is provided with a transverse through groove, and an elastic element and a stripper plate placed on the elastic element are provided in the transverse through groove; both lower mold bases are fixedly connected with lower mold fixing sleeves, and both lower mold fixing sleeves are provided with transverse positioning grooves. Both lower mold fixing sleeves are provided with a lower mold and a lower mold core placed in the lower mold. The lower mold is provided with a forming cavity. The outer section of the forming upper mold core is provided with a pressure head, and the outer section of the lower mold core is provided with a curved surface that cooperates with the pressure head; each set of lower mold bases and lower molds is provided with two ejector pins. The two ejector pins are located directly below the two shearing upper molds. The two ejector pins pass through the lower mold base and lower mold longitudinally, and their lower ends contact the stripper plate; a positioning pin is fixedly provided on the lower mold plate between the two lower mold bases.

2. The synthetic brake shoe back positioning groove shearing forming mold as described in claim 1, characterized in that... The positioning pin is fixed to the lower template through a positioning pin seat, and the positioning pin seat is fixedly connected to the lower template.

3. The synthetic brake shoe back positioning groove shearing forming mold as described in claim 1 or 2, characterized in that... Each of the lower mold fixing sleeves is equipped with set screws that contact the lower mold.

4. The synthetic brake shoe back positioning groove shearing forming mold as described in claim 3, characterized in that... The elastic element is a rubber pad or a spring.

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