Extrusion forming die for disc brake lining

Abstract

An extrusion forming die of a disc brake lining comprises a lower die assembly, an upper die and a hydraulic driving unit. The lower die assembly comprises a bottom plate, a lower die and a locking piece. The bottom plate comprises an upper surface, and a lower groove which is sunken downwards from the upper surface is formed in the bottom plate; the lower die comprises a bottom surface and a top surface opposite to the bottom surface, an upper groove which is sunken upwards and corresponds to the lower groove is formed in the bottom surface, the upper groove and the lower groove jointly form a cavity for accommodating the steel sheet, and a lower die cavity which extends downwards from the top surface to the top wall of the upper groove is formed in the lower die; the lower die is placed on the upper surface of the bottom plate and is fixed on the bottom plate through a locking piece; the upper die comprises an extrusion male die which is matched with the lower die cavity in shape and can stretch into the lower die cavity from the top of the lower die cavity. The hydraulic driving unit is used for driving the upper die to move up and down so that the upper die can get close to or get away from the lower die assembly. According to the utility model, the bending deformation of the steel sheet in the extrusion forming process can be avoided, and the manufacturing yield of the disc brake lining is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle brake lining processing, in particular to an extrusion molding die for a disc brake lining. Background Art

[0002] As people's requirements for logistics and transportation safety continue to increase, disc brake systems are gradually becoming popular in commercial vehicles. Disc brake systems use brake calipers to squeeze brake linings and friction plates against each other to generate greater friction, thereby forming the vehicle's braking force. Usually, in order to assemble brake linings on brake calipers and ensure that the parts that match the brake linings and brake discs are made of wear-resistant materials, brake linings include steel sheets and wear-resistant sheets attached to the steel sheets. When making brake linings, the steel sheets are placed in an extrusion mold, and then powder materials are filled in the mold cavity. After the mold is closed, the mold squeezes the powder materials into sheets and combines them with the steel sheets. The existing mold is used to extrude the brake lining, insert the steel sheet from the upper opening of the lower mold cavity, and then fill the lower mold cavity with powder material from the upper opening of the lower mold cavity. When the upper mold is driven by a hydraulic mechanism to extrude the powder material, it is difficult to ensure that the steel sheet is horizontally arranged on the bottom surface of the lower mold cavity during the process of inserting the steel sheet from the upper opening of the lower mold cavity, resulting in a gap between the steel sheet and the bottom surface of the lower mold cavity. During the extrusion process, the steel sheet will be bent due to force, and the bent steel sheet is difficult to be assembled with the brake caliper, causing the brake lining to be scrapped. In short, the existing brake lining extrusion mold has a low yield rate. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of the utility model is to provide an extrusion molding die for a disc brake lining, so as to improve the manufacturing yield of the disc brake lining.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An extrusion die for a disc brake lining, comprising a lower die assembly, an upper die, and a hydraulic drive unit;

[0006] The lower mold assembly includes a bottom plate, a lower mold, and a locking piece; the bottom plate includes an upper surface, and a lower groove is provided on the bottom plate, which is depressed downward from the upper surface; the lower mold includes a bottom surface and a top surface opposite to the bottom surface, and an upper groove is provided on the bottom surface, which is depressed upward and corresponds to the lower groove, and the upper groove and the lower groove together form a chamber for accommodating the steel sheet, and the lower mold is provided with a lower mold cavity extending downward from the top surface to the top wall of the upper groove; the lower mold is placed on the upper surface of the bottom plate and fixed to the bottom plate by the locking piece;

[0007] The upper die includes an extrusion punch that matches the shape of the lower die cavity and can extend into the lower die cavity from the top;

[0008] The hydraulic drive unit is used to drive the upper die to move up and down so that the upper die is close to or away from the lower die assembly.

[0009] The locking part includes two locking plates and two locking bolts. The two locking plates are respectively placed on both sides of the base plate, and the bottom of the locking plate is pivotally connected to the base plate. The top of the locking plate forms a hook hung on the top surface of the lower mold. A bolt hole is respectively arranged on both sides of the lower mold. The two locking bolts are respectively passed through the two locking plates and then screwed into the two bolt holes.

[0010] A waist-shaped hole extending in the height direction is provided on the locking plate, and the locking bolt is passed through the waist-shaped hole.

[0011] A positioning mechanism is arranged between the upper surface of the bottom plate and the bottom surface of the lower mold, and the positioning mechanism is used to limit the freedom of relative movement of the lower mold and the bottom plate in the horizontal direction.

[0012] The positioning mechanism includes a plurality of positioning posts arranged on the upper surface of the bottom plate at the outer periphery of the lower groove, and a plurality of positioning grooves arranged on the bottom surface of the lower mold at the outer periphery of the upper groove, and the plurality of positioning posts are connected in a one-to-one correspondence in the plurality of positioning grooves.

[0013] The upper die comprises a top plate, and the top of the extrusion punch is fixedly connected to the lower surface of the top plate.

[0014] The lower surface of the top plate is fixedly connected with a plurality of guide rods extending downward, the lower die is provided with a plurality of guide holes extending from the top surface to the bottom surface of the lower die, and the plurality of guide rods are correspondingly connected in the plurality of guide holes.

[0015] The upper surface of the bottom plate is provided with a plurality of guide grooves corresponding to the guide holes one by one, and the guide grooves are located below the corresponding guide holes for the lower end of the guide column to penetrate.

[0016] The beneficial effects of the utility model are:

[0017] Since the utility model sets the bottom plate and the lower die as a split structure, when manufacturing the disc brake lining, the steel sheet can be first placed in the lower groove of the bottom plate, and the lower groove is used to position the steel sheet, and the upper die is used to press the steel sheet onto the bottom plate, and the lower die and the bottom plate are locked by a locking piece to clamp the steel sheet. In this way, it can be ensured that the steel sheet is placed flat, and the steel sheet is prevented from bending and deforming during the extrusion molding process, thereby improving the manufacturing yield of the disc brake lining. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the assembly of the utility model;

[0020] Figure 3 It is a cross-sectional view of the utility model;

[0021] Figure 4 for Figure 2 Schematic diagram of the structure of the middle and lower molds. DETAILED DESCRIPTION

[0022] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described:

[0023] like Figure 1 , 2 , 3, and 4 show an extrusion molding die for a disc brake lining of the present invention, which includes a lower die assembly, an upper die 40, and a hydraulic drive unit. The lower die assembly includes a bottom plate 20, a lower die 10, and a locking member 30. The bottom plate 20 is used to mount the lower die assembly on a work surface, and includes an upper surface 201. In addition, a lower groove 21 formed by the upper surface 201 being recessed downward is provided on the bottom plate 20. The lower die 10 includes a bottom surface 102 and a top surface 101 opposite to the bottom surface 102. An upward recess 21 is provided on the bottom surface 102. The upper groove 13 is corresponding to the lower groove 21 and is directly opposite to each other. After the lower die 10 is placed on the bottom plate 20, the upper groove 13 and the lower groove 21 cooperate with each other to form a chamber, which is used to accommodate the steel sheet 50. The lower die 10 is also provided with a lower model cavity 11, which extends downward from the top surface 101 to the top wall of the upper groove 13. After the lower die 10 is placed on the bottom plate 20, the lower die 10 is locked on the bottom plate 20 by the locking member 30. The lower die 10 can be removed from the bottom plate 20 by opening the locking member 30. The upper die 40 includes an extrusion punch 42, the cross-sectional shape of the extrusion punch 42 is consistent with the cross-sectional shape of the lower model cavity 11, and the hydraulic drive unit is used to drive the extrusion punch 42 to move up and down, and the extrusion punch 42 can be embedded in the lower model cavity 11 after moving downward.

[0024] When the utility model is in use, the locking piece 30 is in an open state, the lower die 10 is removed from the base plate 20, the steel sheet 50 is placed in the lower groove 13, and the steel sheet 50 is positioned by using the lower groove 13, and then the lower die 10 is placed on the base plate 20, so that the upper part of the steel sheet 50 protruding from the upper surface 201 of the base plate 20 is embedded in the upper groove 13, and then the lower die 10 is fixed on the base plate 20 by using the locking piece 30, and the powder material is filled into the lower die cavity 11 through the top opening of the lower mold cavity 11, and the hydraulic drive unit is started to drive the upper die 40 to move downward, and the extrusion punch 42 is embedded in the lower mold cavity 11, and the powder material in the lower mold cavity 11 is extruded, so that the powder material is extruded and formed while adhering to the steel sheet 50. After the extrusion is completed, the locking piece 30 is opened, and the lower die 10 is lifted upward, so that the formed powder material is demolded from the lower mold cavity 11. At this time, the powder material is formed and forms a disc brake lining together with the steel sheet 50. In the utility model, since the base plate and the lower die are arranged as a split structure, when manufacturing the disc brake lining, the steel sheet can be first placed in the lower groove of the base plate, and the lower groove is used to position the steel sheet, and the upper die is used to press the steel sheet onto the base plate, and the lower die and the base plate are locked with a locking piece to clamp the steel sheet. In this way, it can be ensured that the steel sheet is placed flat, and the steel sheet is prevented from bending and deforming during the extrusion molding process, thereby improving the manufacturing yield of the disc brake lining.

[0025] In a preferred embodiment, the locking member 30 of the utility model includes two locking plates 31 and two locking bolts 32. The two locking plates 31 are respectively placed on both sides of the bottom plate 20, and the bottom of the locking plate 31 is pivotally connected to the bottom plate 20. A hook 311 is formed on the top of the locking plate 31. A bolt hole 12 is respectively provided on both sides of the lower mold 10. The two locking bolts 32 are respectively connected to the two locking plates 31. The locking plates 31 can be flipped upward so that the hooks 311 are hung on the top surface 101 of the lower mold 10. Then the locking bolts 32 are screwed into the bolt holes 12 and the locking bolts 32 are tightened. At this time, the locking member 30 can be used to lock the lower mold 10 on the bottom. When demoulding is required, the locking bolt 32 is loosened and the locking plate 31 is flipped downward, so that the lower mold 10 and the bottom plate 20 can be opened, and the lower mold 10 can be detached from the bottom plate 20; in order to enable the locking bolt 32 to align with the bolt hole 12 after passing through the locking plate 31, a waist-shaped hole 312 extending in the height direction is opened on the locking plate 31. When the locking plate 31 is flipped upward, if the hook 311 on the locking plate 31 is not completely hung on the top surface 101, the locking bolt 32 can be swung up and down so that the locking bolt 32 extends horizontally and aligns with the bolt hole 12, and then the locking bolt 32 can be inserted into the bolt hole 12 when the locking plate 31 is in a deflected state.

[0026] In order to position the lower mold 10 and the bottom plate 20 after placing the lower mold 10 on the bottom plate 20, a positioning mechanism is set between the upper surface of the bottom plate 20 and the bottom surface 102 of the lower mold 10, and the positioning mechanism is used to limit the freedom of relative movement of the lower mold 10 and the bottom plate 20 in the horizontal direction. Specifically, the positioning mechanism includes a plurality of positioning posts 22 arranged on the upper surface 201 of the bottom plate 20 and located at the outer periphery of the lower groove 21, and a plurality of positioning grooves 15 arranged on the bottom surface 102 of the lower mold 10 and located at the outer periphery of the upper groove 13, and the plurality of positioning posts 22 are connected one by one in the plurality of positioning grooves 15; in other embodiments, the positioning posts 22 may be arranged on the bottom surface 102 of the lower mold 10, and the positioning grooves 15 may be correspondingly arranged on the upper surface 201 of the bottom plate 20.

[0027] The upper mold 40 includes a top plate 41, and an extrusion punch 42 is fixedly connected to the lower surface of the top plate 41. The hydraulic drive unit may be a hydraulic cylinder, and the lower end of the telescopic rod of the hydraulic cylinder is connected to the top plate 41. A plurality of guide rods 43 extending downward are also fixedly connected to the lower surface of the top plate 41. The lower mold 10 is provided with a plurality of guide holes 14 extending from the top surface 101 of the lower mold 10 to the bottom surface 102. The plurality of guide rods 43 are connected to the plurality of guide holes 14 one by one. The guide rods 43 and the guide holes 14 guide the up and down movement of the upper mold 40, so that the extrusion punch 42 can slide smoothly in the lower mold cavity 11. A plurality of guide grooves 23 are also provided on the upper surface 201 of the base plate 20. The plurality of guide grooves 23 are provided in one-to-one correspondence with the plurality of guide holes 14. The guide grooves 23 are located directly below the corresponding guide holes 14. When the guide rod 43 moves downward to the maximum displacement, the lower end of the guide column 43 penetrates into the guide groove 23. The guide groove 23 further guides the guide column 43, and at the same time prevents the guide column 43 from rigidly colliding with the base plate 20 when the upper mold 40 moves downward, thereby protecting the hydraulic drive unit and the upper mold 40.

[0028] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An extrusion die for a disc brake lining, characterized in that: It includes a lower die assembly, an upper die and a hydraulic drive unit; The lower mold assembly includes a bottom plate, a lower mold, and a locking piece; the bottom plate includes an upper surface, and a lower groove is provided on the bottom plate, which is depressed downward from the upper surface; the lower mold includes a bottom surface and a top surface opposite to the bottom surface, and an upper groove is provided on the bottom surface, which is depressed upward and corresponds to the lower groove, and the upper groove and the lower groove together form a chamber for accommodating the steel sheet, and the lower mold is provided with a lower mold cavity extending downward from the top surface to the top wall of the upper groove; the lower mold is placed on the upper surface of the bottom plate and fixed to the bottom plate by the locking piece; The upper die includes an extrusion punch that matches the shape of the lower die cavity and can extend into the lower die cavity from the top; The hydraulic drive unit is used to drive the upper die to move up and down so that the upper die is close to or away from the lower die assembly.

2. The extrusion molding die for a disc brake lining according to claim 1, characterized in that: The locking part includes two locking plates and two locking bolts. The two locking plates are respectively placed on both sides of the base plate, and the bottom of the locking plate is pivotally connected to the base plate. The top of the locking plate forms a hook hung on the top surface of the lower mold. A bolt hole is respectively arranged on both sides of the lower mold. The two locking bolts are respectively passed through the two locking plates and then screwed into the two bolt holes.

3. The extrusion molding die for a disc brake lining according to claim 2, characterized in that: A waist-shaped hole extending in the height direction is provided on the locking plate, and the locking bolt is passed through the waist-shaped hole.

4. The extrusion molding die for a disc brake lining according to claim 1, characterized in that: A positioning mechanism is arranged between the upper surface of the bottom plate and the bottom surface of the lower mold, and the positioning mechanism is used to limit the freedom of relative movement of the lower mold and the bottom plate in the horizontal direction.

5. The extrusion molding die for a disc brake lining according to claim 4, characterized in that: The positioning mechanism includes a plurality of positioning posts arranged on the upper surface of the bottom plate at the outer periphery of the lower groove, and a plurality of positioning grooves arranged on the bottom surface of the lower mold at the outer periphery of the upper groove, and the plurality of positioning posts are connected in a one-to-one correspondence in the plurality of positioning grooves.

6. The extrusion molding die for a disc brake lining according to claim 1, characterized in that: The upper die comprises a top plate, and the top of the extrusion punch is fixedly connected to the lower surface of the top plate.

7. The extrusion die for a disc brake lining according to claim 6, characterized in that: The lower surface of the top plate is fixedly connected with a plurality of guide rods extending downward, the lower die is provided with a plurality of guide holes extending from the top surface to the bottom surface of the lower die, and the plurality of guide rods are correspondingly connected in the plurality of guide holes.

8. The extrusion molding die for a disc brake lining according to claim 7, characterized in that: The upper surface of the bottom plate is provided with a plurality of guide grooves corresponding to the guide holes one by one, and the guide grooves are located below the corresponding guide holes for the lower end of the guide column to penetrate.

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