End cone die

Abstract

The end cone mold comprises an outer limiting piece and an inner jacking mechanism, a containing groove opposite to a fixed mold is formed in the outer limiting piece, the inner jacking mechanism is arranged in the containing groove, the inner jacking mechanism comprises a plurality of sliding blocks which can be mutually gathered or diffused, and the multiple sliding blocks are distributed in the containing groove in the circumferential direction; an annular first forming face is formed on the side wall of the containing groove, second forming faces are formed on the side wall, opposite to the first forming face, of the sliding block, a forming cavity is formed between the first forming face and the multiple second forming faces, the first forming face comprises an annular outer contact face and an annular outer forming face, and the annular outer contact face and the annular outer forming face are distributed in the axis direction of the first forming face. One end of the outer forming face is connected with one end of the outer contact face, the other end of the outer forming face deflects in the radial direction away from the outer forming face, the second forming face comprises an inner contact face and an inner forming face, the inner contact face is opposite to the outer contact face, and the outer forming face is opposite to the inner forming face. The structure is stable, and the machining cost is low.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of molds, in particular to an end cone mold. BACKGROUND

[0002] The application of the end cone mold in actual production is mainly concentrated in the occasions requiring precise forming and high wear resistance in the manufacturing and processing process, especially in the forming and processing of some materials such as metal, plastic and rubber. Since the precision and shape of the end cone mold have high requirements, the end part of the end cone mold is chamfered or subjected to other processing techniques so that the end cone mold can meet the requirements of the drawing.

[0003] The mounting part of the end cone is usually designed as an inwardly bent chamfer structure so as to play a certain guiding role in the process of assembling the end cone, facilitate the end cone to enter the cylinder and improve the assembly efficiency.

[0004] The mounting part of the traditional machined end cone is usually subjected to polishing or polishing treatment, which will affect the thickness of the end part of the end cone, cause the end cone to be more easily deformed and affect the stability and safety of the end cone. SUMMARY

[0005] The present application aims to solve one of the problems in the related art to some extent. To this end, the present application provides an end cone mold which has the advantages of stable structure and low processing cost.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0007] An end cone mold for forming a whole-circle chamfer of an end part of an end cone, the end cone mold comprising a movable mold and a fixed mold, the movable mold comprising an outer limiting piece and an inner pressing mechanism, the outer limiting piece being provided with an accommodating groove opposite to the fixed mold, the inner pressing mechanism being arranged in the accommodating groove, the inner pressing mechanism comprising a plurality of sliders capable of being gathered or spread, the plurality of sliders being distributed circumferentially in the accommodating groove; an annular first forming surface is formed on the side wall of the accommodating groove, a second forming surface is formed on the side wall opposite to the first forming surface of the slider, a forming cavity is formed between the first forming surface and the plurality of second forming surfaces, the first forming surface comprises an annular outer contact surface and an annular outer forming surface distributed along the axis direction of the first forming surface, the first end of the outer forming surface is connected with the outer contact surface, the second end of the outer forming surface is deflected to the inner side of the outer contact surface, the second forming surface comprises an inner contact surface and an inner forming surface, the inner contact surface is opposite to the outer contact surface, and the outer forming surface is opposite to the inner forming surface; in the case that the movable mold moves towards the fixed mold and the plurality of sliders spread outward, the annular end part of the end cone is extruded and formed into the whole-circle chamfer by the first forming surface and the second forming surface in the forming cavity.

[0008] The slider is used to extrude the end of the end cone to bend it to meet the process requirements, wherein the second forming surface and the first forming surface respectively fit the inner and outer surfaces of the end of the end cone, the end of the end cone is extruded by the sliding of the slider away from the axis in the radial direction, and due to the bending direction of the first forming surface and the second forming surface, the bending direction of the formed forming cavity is also the same, so that the bending direction of the end of the end cone is inward.

[0009] Through the above arrangement, during the processing of the end cone, the thickness of the end of the end cone does not change, and the structural strength of the end of the end cone can be maintained at a high level, so that the end of the end cone has high structural strength, good processing effect and good stability of the end cone.

[0010] Optionally, the first forming surface further comprises a connecting surface, the connecting surface is annularly distributed along the axis direction of the first forming surface, and two ends of the connecting surface are respectively and smoothly connected with the outer forming surface and the outer contact surface.

[0011] The connecting surface is used to connect the outer forming surface and the outer contact surface, and due to the included angle between the outer forming surface and the outer contact surface, direct connection exists the problem that the end of the end cone is broken when the relative movable die moves, which affects the yield.

[0012] Optionally, a gap is formed between adjacent sliders, and when the sliders spread to the outermost side, the gap between adjacent sliders is 3-5 mm.

[0013] The gap between the sliders is used to place the collision between the sliders during the movement of the sliders, and when the movable die moves to the state of closely abutting the fixed die, the gap between the sliders is less than 2 mm to generate force on the end of the end cone as much as possible, so as to avoid that part of the structure of the end of the end cone cannot be affected by the slider, which affects the continuity of the end of the end cone.

[0014] Optionally, the angle of the second end of the outer forming surface outwardly deflected to the inner side of the outer contact surface is 10°-60°.

[0015] The outer forming surface is used to control the forming angle of the end of the end cone, and the included angle between the outer forming surface and the axis determines the included angle between the end of the end cone and the axis after processing, and different end cone ends and end cones with different inward deflection angles can be obtained by selecting different molds with different included angles between the end of the outer forming surface away from the end of the outer contact surface and the axis of the outer forming surface.

[0016] Optionally, an annular outer guide surface is further formed on the outer limiting piece, the outer guide surface is located at the end of the accommodating groove, one end of the inner side of the outer guide surface is connected with the outer contact surface, and the opening of the outer end of the outer guide surface is larger than that of the inner end.

[0017] The opening size of the outer guide surface forms an opening of the outer side wall of the forming cavity which is large at the outside and small at the inside, and the outer guide surface is used for facilitating the end cone end to enter the forming cavity.

[0018] Optionally, the slider further forms an inner guide surface, which is located on the side of the slider close to the inner side wall of the accommodating groove, and the opening at the inner side of the inner guide surface is larger than the opening at the outer side.

[0019] The opening size of the inner guide surface forms an opening of the inner side wall of the forming cavity which is large at the outside and small at the inside, and the inner guide surface is used for facilitating the end cone end to enter the forming cavity.

[0020] Optionally, the movable mold further comprises an upper mold plate, the outer limiting member and the inner pressing mechanism are located on the side of the upper mold plate close to the fixed mold, and the outer limiting member is fixedly connected with the upper mold plate.

[0021] The upper mold plate is used for mounting the inner pressing mechanism and the outer limiting member, and the outer limiting member and the inner pressing mechanism are located on the side close to the fixed mold, so that the outer limiting member and the inner pressing mechanism can cooperate with the corresponding structure of the fixed mold to complete the processing of the end cone end during the movement of the movable mold to the fixed mold.

[0022] Optionally, the inner pressing mechanism further comprises an elastic unit and a material returning unit, the elastic unit and the material returning unit are located on the side of the upper mold plate close to the fixed mold, the elastic unit is close to the upper mold plate relative to the material returning unit, and is fixedly connected with the upper mold plate, one end of the elastic unit away from the upper mold plate is connected with the material returning unit, the elastic unit can relatively displace with the material returning unit, one end of the material returning unit away from the elastic unit is connected with the slider, and one end of the material returning unit away from the upper mold plate is in communication with one end of the forming cavity close to the upper mold plate; during the movement of the movable mold away from the fixed mold after the end cone is formed, the material returning unit can push the end cone.

[0023] When the movable mold moves away from the fixed mold until the movable mold abuts against the end cone on the fixed mold, the elastic unit and the material removal unit remain in a relatively static state. When the movable mold continues to move in the direction of approaching the fixed mold, the material removal unit and the elastic unit are relatively displaced, the elastic unit accumulates elastic potential energy, and at the same time, the material removal unit moves in the direction of approaching the upper mold plate until the material removal unit abuts against the end of the end cone, and then the movable mold moves away from the fixed mold. At this time, the elastic unit starts to release the accumulated elastic potential energy, and exerts a force on the material removal unit in the direction away from the upper mold plate. The force received by the material removal unit is transmitted to the slider and the end of the end cone, pushing the slider to move away from the upper mold plate, and pushing the end of the end cone to gradually leave the forming cavity, facilitating the removal of the end cone.

[0024] Optionally, the inner top pressing mechanism further comprises a pressing column, the pressing column is located in the accommodating groove, the first end of the pressing column is fixedly connected with the upper mold plate, the second end of the pressing column extends away from the upper mold plate, the diameter of the second end of the pressing column decreases in the direction away from the upper mold plate, and an included angle is formed between the second end side wall of the pressing column and the axis of the pressing column, the included angle is greater than or equal to 5° and less than or equal to 15°.

[0025] The pressing column is used to drive the slider to move radially through the included angle between the end side wall and the axis during the movement of the movable mold relative to the fixed mold, so as to push the slider away from the axis during the movement of the movable mold to the fixed mold, so that the end of the end cone is bent under stress. The size of the included angle between the end side wall of the pressing column and the axis is used to control the speed of the outward movement of the slider during the movement of the movable mold, so as to keep the movement speed of the slider at a level that can extrude the end of the end cone without affecting the structural strength of the end of the end cone due to too fast movement.

[0026] Optionally, the minimum distance between the two sides of the forming cavity is greater than or equal to 3 mm and less than or equal to 6 mm.

[0027] The forming cavity is used to accommodate the end of the end cone, the distance of the forming cavity is greater than or equal to 3 mm, which can adapt to the thickness of the end of the end cone, and at the same time, the distance of the forming cavity cannot be too large to meet the process requirement of extruding the end of the end cone.

[0028] The features and advantages of the present application will be described in detail in the following specific embodiments and drawings. The best mode or means of the present application will be fully illustrated in conjunction with the drawings, but it is not a limitation on the technical solutions of the present application. In addition, the features, elements and components appearing in each of the following text and drawings are multiple, and different symbols or numbers are marked for convenience of representation, but all represent the same or similar structure or function parts. Attached Figure Description

[0029] The present invention will be further described below with reference to the accompanying drawings:

[0030] Figure 1 This is a structural diagram of an end cone mold according to the present invention.

[0031] Figure 2 This is a cross-sectional view of an end cone mold according to the present invention.

[0032] Figure 3 This is a partially enlarged cross-sectional view of an end-tapered mold according to the present invention.

[0033] Figure 4 This is a bottom view of an end cone mold of the present invention in the open state.

[0034] Figure 5 This is a bottom view of an end cone mold of the present invention in the closed state.

[0035] Figure 6 This is a front side view of the end cone machining of an end cone mold according to the present invention.

[0036] Figure 7 This is a perspective view of the end cone of an end cone mold before machining, according to the present invention.

[0037] Figure 8 This is a side view of the end cone forming process of an end cone mold according to the present invention.

[0038] Figure 9 This is a perspective view of the end cone of an end cone mold after the end cone is formed according to the present invention.

[0039] Explanation of reference numerals in the attached drawings: 1. Movable mold; 11. Outer limiting component; 111. Receiving groove; 1111. First forming surface; 11111. Outer contact surface; 11112. Outer forming surface; 11113. Connecting surface; 1112. Outer guide surface; 12. Inner pressing mechanism; 121. Slider; 1211. Second forming surface; 12111. Inner contact surface; 12112. Inner forming surface; 1212. Inner guide surface; 122. Elastic unit; 123. Material ejection unit; 124. Pressing column; 13. Forming cavity; 14. Upper template; 2. Fixed mold. Detailed Implementation

[0040] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are intended to explain the present invention and should not be construed as limiting the invention.

[0041] The terms "an embodiment," "example," or "trademark" used in this specification refer to a particular feature, structure, or characteristic described in connection with the embodiment itself that may be included in at least one embodiment disclosed in this invention. The phrase "in an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0042] like Figures 1-4 As shown, an end cone mold is used to form a rounded chamfer at the end of an end cone. The end cone mold includes a movable mold 1 and a fixed mold 2. The movable mold 1 includes an outer limiting member 11 and an inner pressing mechanism 12. The outer limiting member 11 is provided with a receiving groove 111 opposite to the fixed mold 2. The inner pressing mechanism 12 is disposed in the receiving groove 111. The inner pressing mechanism 12 includes a plurality of sliders 121 that can converge or diffuse with each other. The plurality of sliders 121 are circumferentially distributed in the receiving groove 111. An annular first forming surface 1111 is formed on the side wall of the receiving groove 111. A second forming surface 1211 is formed on the side wall of the sliders 121 opposite to the first forming surface 1111. A forming cavity 13 is formed between the first forming surface 1111 and the plurality of second forming surfaces 1211. The first forming surface 1111 encloses... The first molding surface 1111 includes an annular outer contact surface 11111 and an annular outer molding surface 11112 distributed along the axial direction of the first molding surface 1111. The first end of the outer molding surface 11112 is connected to the outer contact surface 11111, and the second end of the outer molding surface 11112 is deflected inward toward the outer contact surface 11111. The second molding surface 1211 includes an inner contact surface 12111 and an inner molding surface 12112. The inner contact surface 12111 and the outer contact surface 11111 are opposite to each other, and the outer molding surface 11112 and the inner molding surface 12112 are opposite to each other. When the movable mold 1 moves toward the fixed mold 2 and the plurality of sliders 121 spread outward, the annular end of the end cone is squeezed into the round chamfer by the first molding surface 1111 and the second molding surface 1211 in the molding cavity 13.

[0043] In this embodiment, the outer contact surface 11111 is parallel to the axis of the first molding surface 1111, and is used to fit against the end of the end cone before bending, and guide the end of the end cone into the molding cavity 13 to contact the outer molding surface 11112.

[0044] The inner contact surface 12111 is parallel to the axis of the second molding surface 1211, and is used to fit against the end of the end cone before bending, and guide the end of the end cone into the molding cavity 13 to contact the inner molding surface 12112. Both the outer molding surface 11112 and the inner molding surface 12112 have one end bent towards the axis, and the bent end is closer to the inside of the receiving groove 111 than the other end.

[0045] In the embodiment, the first forming surface 1111 and the second forming surface 1211 are oppositely arranged and surround the forming cavity 13, wherein the first forming surface 1111 and the second forming surface 1211 are arc surfaces, the slope changes smoothly, and the end cone end is not easy to break, in actual use, the first forming surface 1111 and the second forming surface 1211 are not necessarily arc surfaces, but can also be planes or conical surfaces, which are not limited in the application.

[0046] In the embodiment, the number of the sliding blocks 121 is four, the shapes of the sliding blocks 121 are the same, and the sliding blocks 121 are uniformly distributed along the inner circumference of the accommodating groove 111, in other embodiments, the number of the sliding blocks 121 can also be other numbers, which are not limited in the application.

[0047] In the embodiment, the fixed die 2 is provided with a fixed seat for supporting the fixed end cone, the fixed seat is provided with a fixed groove for accommodating the end cone protrusion, and the end cone can be fixed with the fixed groove to stably fix the end cone in the fixed seat.

[0048] The sliding blocks 121 are used to extrude the end of the end cone to bend it to meet the process requirements, wherein the second forming surface 1211 and the first forming surface 1111 respectively abut the inner and outer surfaces of the end of the end cone, the end of the end cone is extruded by the sliding of the sliding blocks 121 away from the axis in the radial direction, and due to the bending direction of the first forming surface 1111 and the second forming surface 1211, the bending direction of the forming cavity 13 formed is the same, so that the bending direction of the end of the end cone is inward.

[0049] The first forming surface 1111 further includes a connecting surface 11113, which is annularly distributed along the axis direction of the first forming surface 1111, and the two ends of the connecting surface 11113 are respectively and smoothly connected with the outer forming surface 11112 and the outer contact surface 11111.

[0050] In the embodiment, the connecting surface 11113 smoothly connects the outer forming surface 11112 and the outer contact surface 11111, and the connecting surface 11113 is an arc surface, in other embodiments, the connecting surface 11113 can also be a plane, which is not limited in the application.

[0051] The connecting surface 11113 is used to connect the outer forming surface 11112 and the outer contact surface 11111, and due to the included angle between the outer forming surface 11112 and the outer contact surface 11111, direct connection can cause the end of the end cone to break when the relative movable die 1 moves, which affects the yield of the finished product.

[0052] As Figures 5-6 shown, gaps are formed between adjacent sliders 121, and when the sliders 121 spread to the outermost side, the gaps between adjacent sliders 121 are 3-5 mm.

[0053] The gaps between the sliders 121 are used to prevent collision between the sliders 121 during movement of the sliders 121, and when the movable mold 1 moves to a state of being in close contact with the fixed mold 2, the gaps between the sliders 121 are less than 2 mm to exert force on the end of the end cone as much as possible, avoiding that part of the structure of the end of the end cone is not affected by the sliders 121 to affect the continuity of the end of the end cone.

[0054] The angle of the outer forming surface 11112 deviating from the outer contact surface 11111 to the inner side of the outer contact surface 11111 of the second end of the outer forming surface 11112 is 10°-60°.

[0055] The outer forming surface 11112 is used to control the forming angle of the end of the end cone, and the included angle between the outer forming surface 11112 and the axis determines the included angle between the end of the end cone and the axis after processing. According to the requirements, different molds with different included angles of the outer forming surface 11112 deviating from the outer contact surface 11111 to the axis of the outer forming surface 11112 can be selected to obtain end cones with different inwardly folded angles of the end of the end cone.

[0056] The outer limiting piece 11 also has an annular outer guide surface 1112, which is located at the end of the accommodating groove 111, and the inner side of the outer guide surface 1112 is connected with the outer contact surface 11111, and the opening of the outer side of the outer guide surface 1112 is larger than that of the inner side.

[0057] The size of the opening of the outer guide surface 1112 forms an opening of the outer side wall of the forming cavity 13, which is large outside and small inside, and the outer guide surface 1112 is used to facilitate the end of the end cone to enter the forming cavity 13.

[0058] The slider 121 also has an inner guide surface 1212, which is located on the side of the slider 121 close to the inner side wall of the accommodating groove 111, and the opening of the inner side of the inner guide surface 1212 is larger than that of the outer side.

[0059] The size of the opening of the inner guide surface 1212 forms an opening of the inner side wall of the forming cavity 13, which is large outside and small inside, and the inner guide surface 1212 is used to facilitate the end of the end cone to enter the forming cavity 13.

[0060] The movable mold 1 further comprises an upper mold plate 14, the outer limiting member 11 and the inner pressing mechanism 12 are located on a side of the upper mold plate 14 close to the fixed mold 2, and the outer limiting member 11 is fixedly connected with the upper mold plate 14.

[0061] The upper mold plate 14 is used for mounting the inner pressing mechanism 12 and the outer limiting member 11, and the outer limiting member 11 and the inner pressing mechanism 12 are located on a side close to the fixed mold 2, so that the outer limiting member 11 and the inner pressing mechanism 12 can cooperate with corresponding structures of the fixed mold 2 to complete the machining of the end of the end cone during the movement of the movable mold 1 to the fixed mold 2.

[0062] The inner pressing mechanism 12 further comprises an elastic unit 122 and a material removing unit 123, the elastic unit 122 and the material removing unit 123 are located on a side of the upper mold plate 14 close to the fixed mold 2, the elastic unit 122 is close to the upper mold plate 14 relative to the material removing unit 123, and is fixedly connected with the upper mold plate 14, one end of the elastic unit 122 away from the upper mold plate 14 is connected with the material removing unit 123, the elastic unit 122 can be relatively displaced with the material removing unit 123, one end of the material removing unit 123 away from the elastic unit 122 is connected with the sliding block 121, and one end of the material removing unit 123 away from the upper mold plate 14 is in communication with one end of the forming cavity 13 close to the upper mold plate 14; during the movement of the movable mold 1 away from the fixed mold 2 after the forming of the end cone, the material removing unit 123 can push the end cone.

[0063] Since adhesion between the movable mold 1 and the end cone may occur under the extrusion force during the forming process, the material removing unit 123 can push the end cone away from the movable mold 1, so that the adhesion and the material blocking are prevented.

[0064] When the movable mold 1 moves downward from a position far away from the fixed mold 2 to abut against the end cone on the fixed mold 2, the elastic unit 122 and the material removal unit 123 remain in a relatively static state, when the movable mold 1 continues to move in the direction of approaching the fixed mold 2, the material removal unit 123 and the elastic unit 122 are relatively displaced, the elastic unit 122 accumulates elastic potential energy, and at the same time the material removal unit 123 moves in the direction of approaching the upper mold plate 14 until the material removal unit 123 abuts against the end of the end cone, and then the movable mold 1 moves away from the fixed mold 2, at this time the elastic unit 122 starts to release the accumulated elastic potential energy, and exerts a force on the material removal unit 123 in the direction away from the upper mold plate 14, the material removal unit 123 transmits the force to the slider 121 and the end of the end cone, pushes the slider 121 to move away from the upper mold plate 14, and pushes the end of the end cone to gradually leave the forming cavity 13, facilitating the removal of the end cone.

[0065] In the embodiment, the elastic unit 122 can be provided as a spring or a nitrogen spring. The working principle of the nitrogen spring is to provide elastic force by compressing nitrogen in a sealed container, which enables it to provide higher force output in a relatively small volume than traditional metal springs, having the advantage of saving space. The elastic force of the nitrogen spring can be adjusted by changing the pressure of the gas, which enables the elastic force to be accurately adjusted according to actual needs, while the force of ordinary metal springs is usually fixed. In addition, unlike traditional coil springs, nitrogen springs can usually provide more linear force output. In some applications with strict requirements for force, nitrogen springs can provide a more stable working state, avoiding the nonlinear elastic change of traditional springs during use, and enabling the end cone to be smoothly pushed out of the accommodating groove 111 during material removal.

[0066] Further, in the embodiment, the slider 121 further comprises a reset member, and the material removal unit 123 further comprises a reset spring, the reset member is fixedly connected with the slider 121, the reset spring is arranged on the side of the material removal unit 123 close to the slider 121, and an opening is formed on the contact surface between the material removal unit 123 and the slider 121, the reset member is connected with the reset spring through the opening, the reset member can compress the reset spring by moving with the slider 121, and the reset spring can drive the slider 121 to move during the extension from the compressed state.

[0067] The inner top pressing mechanism 12 further comprises a top pressing column 124 located in the accommodating groove 111, a first end of the top pressing column 124 is fixedly connected with the upper die plate 14, a second end of the top pressing column 124 extends away from the upper die plate 14, a diameter of the second end of the top pressing column 124 decreases along a direction away from the upper die plate 14, and an included angle between a side wall of the second end of the top pressing column 124 and an axis of the top pressing column 124 is greater than or equal to 5° and less than or equal to 15°.

[0068] In the embodiment, the second end of the top pressing column 124 is formed with a tapered surface, and an inclination angle of the tapered surface is 10°, so that the slider 121 moves smoothly.

[0069] The top pressing column 124 is used to drive the slider 121 to move radially along the included angle between the end side wall and the axis during the movement of the movable die 1 relative to the fixed die 2, so as to push the slider 121 away from the axis during the movement of the movable die 1 to the fixed die 2, so that the end of the end taper is bent under force, and the size of the included angle between the side wall of the end of the top pressing column 124 and the axis is used to control the speed of the outward movement of the slider 121 during the movement of the movable die 1, so as to keep the movement speed of the slider 121 at a level that can extrude the end of the end taper but will not affect the structural strength of the end of the end taper due to too fast.

[0070] Further, the tapered surface of the second end of the top pressing column 124 is designed to make the displacement of the slider 121 in the radial direction and the displacement in the axial direction occur synchronously, that is, during the movement of the movable die 1 to the fixed die 2, the slider 121 moves in the direction away from the axis while also moving in the axial direction to the direction close to the upper die plate 14. In addition, the movement of the plurality of sliders 121 also occurs synchronously. Through the above setting, the embodiment has the advantages of high machining precision and good machining uniformity.

[0071] The minimum distance between the two sides of the forming cavity 13 is greater than or equal to 3 mm and less than or equal to 6 mm.

[0072] The forming cavity 13 is used to accommodate the end of the end taper, the distance between the forming cavities 13 is greater than or equal to 3 mm, which can adapt to the thickness of the end of the end taper, and at the same time, the distance between the forming cavities 13 cannot be too large to meet the process requirement of extruding the end of the end taper.

[0073] The reverse-docking mold in the related art can only be used for forming thin-walled parts and shells due to the small gap left, and cannot be used for processing workpieces such as end tapers with thick side walls, but the distance set in the embodiment can meet the requirements of workpieces with greater thickness, such as end tapers, and has greater application scenarios and application range.

[0074] To embody the advantages of the present application in detail, the working principle of the present embodiment is described as follows:

[0075] First stage: the large end of the end cone to be processed (one end to be formed) is arranged on the fixed mold 2 away from the fixed mold 2, and an interval is formed between the movable mold 1 and the fixed mold 2.

[0076] Second stage: the movable mold 1 starts to move towards the fixed mold 2, at this time, the interval between the movable mold 1 and the fixed mold 2 is reduced, the elastic unit 122 and the material returning unit 123 in the movable mold 1 remain relatively static, the sliding block 121 also remains relatively static with the pressing column 124, and the elastic potential energy accumulated by the elastic unit 122 is 0.

[0077] Third stage: the end of the end cone is annular thick wall, through the guidance of the outer guide surface 1112 and the inner guide surface 1212, the end of the end cone starts to enter the forming cavity 13, and is in contact with the outer contact surface 11111, since the middle part of the side of the end cone close to the movable mold 1 is hollow structure, the sliding block 121 is not in contact with the end cone in this stage, the interaction force between the end cone and the sliding block 121 is 0, at this time, the state of the end cone is shown in Figure 6 and Figure 7 .

[0078] In the fourth stage, for the convenience of description, the moving direction of the movable mold 1 close to the fixed mold 2 is defined as the first direction, the moving direction of the movable mold 1 away from the fixed mold 2 is defined as the second direction, the direction of the slider 121 spreading outward is defined as the third direction, and the direction opposite to the third direction is defined as the fourth direction. Obviously, the first direction and the second direction are opposite and both perpendicular to the third direction. The end of the end cone completely covers the outer contact surface 11111 in the first direction, and starts to contact the connecting surface. The slider 121 enters the hollow part at the top of the end cone, and at least part of the structure is in contact with the inner surface of the end cone. Since the movable mold 1 is still moving in the first direction at this time, the end cone and the slider 121 start to generate a force. Specifically, the end cone is fixed on the fixed mold 2, the slider 121 abuts against the end cone, the upper mold plate 14 moves in the first direction, and the slider 121 cannot follow the upper mold plate 14 to move synchronously in the first direction due to the close contact with the material returning unit 123 and the end cone in the first direction. The slider 121 reaches a force balance in the first direction. The force between the material returning unit 123 and the slider 121 is defined as F1, the component force between the pressing column 124 and the slider 121 in the first direction is defined as F2, and the component force between the end cone and the slider 121 in the first direction is defined as F3. There is F1+F2=F3. However, in the third direction, the component force between the pressing column 124 and the slider 121 in the third direction is greater than the component force between the end cone and the slider in the fourth direction. The slider 121 receives a resultant force greater than 0 in the third direction, moves in the third direction (outward), and keeps abutting against the pressing column 124 during the movement. Therefore, the slider 121 moves in the third direction in this stage, and the gap between the slider 121 and the side wall of the end cone decreases until the inner contact surface 12111 of the slider 121 abuts against the inner wall of the end cone.

[0079] At the same time, although the slider 121 keeps relatively static with the fixed mold 2 in the first direction, the relative movement between the slider 121 and the movable mold 1 occurs due to the movement of the interactive mold 1 in the first direction. Specifically, the slider 121 moves in the third direction and the second direction relative to the upper mold plate 14. During this process, since the material returning unit 123 is a rigid element and cannot be compressed, the relative sliding of the slider 121 in the second direction with the upper mold plate 14 pushes the material returning unit 123 to move in the second direction relative to the upper mold plate 14. At this time, the elastic unit 122 is extruded by the material returning unit 123, compresses the internal nitrogen, and stores elastic potential energy.

[0080] Fifth stage: when the inner wall of the end cone and the outer wall of the slider 121 are in contact, the inner contact surface is in close contact with the inner wall of the end cone, at this time the movable mold 1 is still moving in the first direction, the slider 121 still has a tendency to move in the third direction, and the end of the end cone is in close contact with the connecting surface 11113. Since the connecting surface 11113, the outer forming surface 11112 and the inner forming surface 12112 are all curved towards the second direction, and the end of the end cone is a flat annular structure, the first forming surface 1111 starts to generate a force on the end of the end cone, which is perpendicular to the first forming surface in contact with the end of the end cone. The end of the end cone starts to bend in the fourth direction (inside), and the inner side wall of the bent part is bent to fit the inner forming surface of the slider, so that the first forming surface and the second forming surface together form the bending structure of the end of the end cone. Among them, the inner forming surface is used to provide support inside the end cone to ensure that the inner surface of the end cone meets the workpiece requirements during bending, until the end of the end cone is completely in the forming cavity 13. At this time, the end of the end cone forms a whole circle chamfer inwardly bent, and abuts against the material returning unit, and the elastic potential energy stored by the elastic unit 122 reaches the maximum value.

[0081] Sixth stage: after the forming is completed, the movable mold 1 starts to move away from the fixed mold 2 in the second direction, and the outer limiting piece is driven upward by the upper mold plate. Due to the elastic potential energy stored by the elastic unit 122, the material returning unit does not move upward with the upper mold plate at this time, and remains relatively static with the fixed mold 2, and forms relative motion with the movable mold 1. At this time, the state of the end cone is referred to in Figure 8 and Figure 9 .

[0082] Seventh stage: the material returning unit 123 keeps the force on the end of the end cone and the slider 121 in the first direction, and the slider 121 moves in the second direction relative to the upper mold plate 14 under the action of the material returning unit 123. Since the top pressing column 124 is fixedly connected with the upper mold plate 14, the slider 121 is pressed by the material returning unit 123 and remains static in the first direction, and the relative displacement occurs between the slider 121 and the top pressing column 124. Due to the action of the reset member and the reset spring, the slider 121 moves in the fourth direction at this time, the gap of the forming cavity becomes larger, and multiple sliders 121 shrink to avoid the inwardly bent part of the end cone in the vertical direction, so as to avoid the interference between the inner forming surface of the slider 121 and the bent part of the end cone, and block the material returning of the end cone;

[0083] At the same time, the material returning unit 123 pushes the end cone to move in the first direction, so that the movable mold 1 gradually moves away from the end cone, until the movable mold is completely separated from the end cone, facilitating the discharging of the end cone.

[0084] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and those skilled in the art should understand that the present application includes but is not limited to the contents described in the above specific embodiments and the drawings. Any modification not deviating from the functional and structural principles of the present application will be included in the scope of the claims.

Claims

1. A nose cone die for forming a full round chamfer of a nose cone end, the nose cone die comprising a movable die (1) and a fixed die (2), characterized in that, The movable mold (1) comprises an outer limiting member (11) and an inner pressing mechanism (12), the outer limiting member (11) is provided with a containing groove (111), the inner pressing mechanism (12) is arranged in the containing groove (111), and the inner pressing mechanism (12) comprises a plurality of sliders (121) which can be gathered or diffused. An annular first forming surface (1111) is formed on the side wall of the containing groove (111), a second forming surface (1211) is formed on the side wall opposite to the first forming surface (1111) of the slider (121), a forming cavity (13) is formed between the first forming surface (1111) and the plurality of second forming surfaces (1211), the first forming surface (1111) comprises an annular outer contact surface (11111) and an annular outer forming surface (11112) which are distributed along the axis direction of the first forming surface (1111), the first end of the outer forming surface (11112) is connected with the outer contact surface (11111), the second end of the outer forming surface (11112) is deflected to the inner side of the outer contact surface (11111), the second forming surface (1211) comprises an inner contact surface (12111) and an inner forming surface (12112), the inner contact surface (12111) is opposite to the outer contact surface (11111), and the outer forming surface (11112) is opposite to the inner forming surface (12112). In the case that the movable mold (1) moves towards the fixed mold (2) and the plurality of sliders (121) are diffused outward, the annular end of the end cone is extruded and formed into the whole-circle chamfer in the forming cavity (13) by the first forming surface (1111) and the second forming surface.

2. The nose cone mold of claim 1, wherein, The first forming surface (1111) further comprises a connecting surface (11113) which is annularly distributed along the axis direction of the first forming surface (1111), and the two ends of the connecting surface (11113) are smoothly connected with the outer forming surface (11112) and the outer contact surface (11111) respectively.

3. The nose cone mold of claim 1, wherein, Gaps are formed between adjacent sliders (121), and when the sliders (121) are diffused to the outermost side, the gaps between adjacent sliders (121) are 3-5 mm.

4. The nose cone mold of claim 1, wherein, The angle at which the second end of the outer forming surface (11112) is deflected to the inner side of the outer contact surface (11111) is 10°-60°.

5. The nose cone mold of claim 1, wherein, An annular outer guide surface (1112) is further formed on the outer limiting member (11), the outer guide surface (1112) is located at the end of the containing groove (111), the inner side end of the outer guide surface (1112) is connected with the outer contact surface (11111), and the opening of the outer side end of the outer guide surface (1112) is larger than that of the inner side end.

6. The nose cone mold of claim 1, wherein, An inner guide surface (1212) is further formed on the slider (121), the inner guide surface (1212) is located on the side of the slider (121) close to the inner side wall of the containing groove (111), and the opening of the inner side end of the inner guide surface (1212) is larger than that of the outer side end.

7. The nose cone mold of claim 1, wherein, The movable mold (1) further comprises an upper mold plate (14), the outer limiting member (11) and the inner top pressing mechanism (12) are located on the side of the upper mold plate (14) close to the fixed mold (2), and the outer limiting member (11) is fixedly connected with the upper mold plate (14).

8. The nose cone mold of claim 7, wherein, The inner top pressing mechanism (12) further comprises an elastic unit (122) and a material returning unit (123), the elastic unit (122) and the material returning unit (123) are located on the side of the upper mold plate (14) close to the fixed mold (2), the elastic unit (122) is close to the upper mold plate (14) relative to the material returning unit (123) and is fixedly connected with the upper mold plate (14), one end of the elastic unit (122) away from the upper mold plate (14) is connected with the material returning unit (123), the elastic unit (122) can be relatively displaced with the material returning unit (123), one end of the material returning unit (123) away from the elastic unit (122) is connected with the sliding block (121), and one end of the material returning unit (123) away from the upper mold plate (14) is in communication with one end of the forming cavity (13) close to the upper mold plate (14). During movement of the movable mold (1) away from the fixed mold (2) after forming of the end cone, the material returning unit (123) can push the end cone.

9. The nose cone mold of claim 1, wherein, The inner top pressing mechanism further comprises a top pressing column (124), the top pressing column (124) is located in the accommodating groove, a first end of the top pressing column (124) is fixedly connected with the upper mold plate (14), a second end of the top pressing column (124) extends away from the upper mold plate (14) in a direction, a diameter of the second end of the top pressing column (124) decreases away from the upper mold plate (14) in the direction, an included angle is formed between a side wall of the second end of the top pressing column (124) and an axis of the top pressing column (124), and the included angle is greater than or equal to 5° and less than or equal to 15°.

10. The end cone mold of any one of claims 1-9, wherein, The minimum distance between the two sides of the forming cavity (13) is greater than or equal to 3mm and less than or equal to 6mm.

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