Pile tip petal forming die

Abstract

The utility model relates to the technical field of pile tip production, and discloses a pile tip petal forming die which comprises a bottom die and a top die assembly, the bottom die is provided with a forming face which protrudes outwards and is at least partially conical, the top face of the forming face is provided with at least one positioning piece, and the positioning piece protrudes out of the forming face and is matched with a positioning hole in a pile tip petal blank. And the middle part of the pile tip valve blank is positioned and mounted on the forming surface. The pile tip petal blank is positioned and installed on the bottom die through the positioning piece, the situation that the formed pile tip petal does not meet the product shape and size requirements due to displacement of the pile tip petal blank in the machining process is avoided, and the forming quality of the pile tip petal product is improved. And the positioning piece is located on the top face of the forming face and matched with a positioning hole in the middle of the pile tip valve blank, so that the forming quality of the produced and formed pile tip valve is high.

Description

Technical Field

[0001] The utility model relates to the technical field of pile tip production, in particular to a pile tip flap forming die. Background Art

[0002] In order to facilitate pile sinking and reduce the probability of pile breakage as much as possible, a pile tip is generally provided at the lower end of a precast concrete pile. Commonly used pile tips mainly include concrete pile tips and steel pile tips. Among them, the commonly used steel pile tips are usually conical cylindrical. The steel pile tips are processed and formed separately. Before the pile sinking operation, the steel pile tips are fixedly installed at the lower end of the precast concrete pile. The current forming method for producing steel pile tips includes manually rolling a fan-shaped flat plate into a conical cylindrical pile tip product through multiple times. The fan-shaped flat plate is not positioned during the rolling process, which makes it easy for the position of the fan-shaped flat plate to move, and there are dimensional errors caused by manual operation, which makes it difficult to unify the shape contour of the finished pile tip, thereby reducing the quality of the finished pile tip. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a pile tip flap forming die which can position the pile tip blank to improve the processing accuracy of the pile tip flap finished product.

[0004] To achieve the above-mentioned purpose, the utility model provides a pile tip flap forming mold, including a bottom mold and a top mold assembly, the bottom mold is provided with a forming surface that protrudes outward and is at least partially conical, the top surface of the forming surface is provided with at least one positioning member, the positioning member protrudes from the forming surface and is adapted to the positioning hole on the pile tip flap blank to position the middle part of the pile tip flap blank and install it on the forming surface.

[0005] Furthermore, the top mold assembly includes a top mold base, a lifting mechanism connected to the top mold base for driving the top mold base to move closer to or away from the bottom mold, and the top mold base is provided with a local inner conical surface that is conformally adapted to the molding surface, and a pile tip valve molding cavity is formed between the molding surface and the local inner conical surface.

[0006] Furthermore, the top mold base is provided with an avoidance hole for the positioning member to enter; and / or, a heating component is provided in the top mold base.

[0007] Furthermore, the top mold assembly includes a top mold base, a lifting mechanism connected to the top mold base for driving the top mold base to move closer to or away from the bottom mold, the top mold base is provided with a local inner conical surface that is roughly adapted to the shape of the forming surface, the local inner conical surface is embedded with an electromagnetic forming coil, and the top mold assembly also includes a power module for supplying power to the electromagnetic forming coil.

[0008] Furthermore, the top mold base is provided with an avoidance hole for the positioning piece to enter.

[0009] Furthermore, a heating component is provided in the bottom mold; and / or the height of the positioning member protruding from the molding surface is less than the wall thickness of the pile tip flap blank.

[0010] Furthermore, one of the bottom mold and the top mold assembly is provided with a guide column, and the other of the bottom mold and the top mold assembly is provided with a guide groove, and the guide column can be inserted into the guide groove.

[0011] Furthermore, the positioning member includes a positioning column, and the bottom mold is provided with a mounting hole for mounting the positioning column.

[0012] Furthermore, the positioning member includes a positioning column, and the positioning column is integrally formed with the bottom mold, or the positioning column is bonded, magnetically connected, or welded to the top surface of the bottom mold.

[0013] Furthermore, the top surface of the bottom mold is provided with a plurality of the positioning members which are arranged at intervals and in a row.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The pile tip flap forming mold includes a bottom mold and a top mold assembly, the bottom mold is provided with a forming surface that protrudes outward and is at least partially conical, and the top surface of the forming surface is provided with at least one positioning member, the positioning member protrudes from the forming surface and is adapted to the positioning hole on the pile tip flap blank, so as to position and install the middle part of the pile tip flap blank on the forming surface. The pile tip flap blank is positioned and installed on the bottom mold by the positioning member, so as to avoid displacement of the pile tip flap blank during processing, which may cause the formed pile tip flap to fail to meet the product shape and size requirements, and improve the forming quality of the pile tip flap product. The positioning member is located on the top surface of the forming surface and is adapted to the positioning hole in the middle part of the pile tip flap blank, so that the forming quality of the produced pile tip flap is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional diagram of a pile tip valve forming mold according to an embodiment of the utility model;

[0017] Figure 2 for Figure 1 The main view of

[0018] Figure 3 for Figure 2 Cross-sectional view along BB direction;

[0019] Figure 4 A three-dimensional diagram of the bottom mold;

[0020] Figure 5 is a three-dimensional diagram of the top mold assembly;

[0021] Figure 6 It is a front view of another pile tip valve forming mold of an embodiment of the utility model;

[0022] Figure 7 A cross-sectional view of another structure of the top mold assembly;

[0023] Figure 8 A cross-sectional view of another structure of the top mold assembly.

[0024] In the accompanying drawings: bottom mold 1; molding surface 11; mounting hole 12; bottom plate 13; column 14; top mold base 2; local inner conical surface 21; avoidance hole 22; heating cavity 23; heating tube 24; connecting plate 4; connecting piece 41; guide column 42; inner conical surface 25; electromagnetic molding coil 26; positioning piece 3; pile tip valve molding cavity a. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] In this article, the terms "upper, lower, inside, outside" and the like are established based on the positional relationships shown in the drawings. The corresponding positional relationships may also change depending on the drawings, and therefore cannot be understood as absolute limitations on the scope of protection; moreover, relational terms such as "first" and "second" and the like are merely used to distinguish one component from another with the same name, and do not necessarily require or imply any actual relationship or order between these components.

[0027] <Example 1>

[0028] Please refer to Figure 1-7 As shown, this embodiment provides a pile tip flap forming mold, which adopts the pressing forming technology to produce the pile tip flap made of metal material, and the pile tip flap forming mold includes a bottom mold 1 and a top mold assembly, the bottom mold 1 is provided with a forming surface 11 protruding outward and at least partially conical, and the top surface of the forming surface 11 is provided with at least one positioning member 3, the positioning member 3 protrudes from the forming surface 11 and is adapted to the positioning hole on the pile tip flap blank, so as to position and install the middle part of the pile tip flap blank on the forming surface 11. The pile tip flap blank is positioned and installed on the bottom mold 1 by the positioning member 3, so as to avoid displacement of the pile tip flap blank during the processing, which causes the formed pile tip flap to fail to meet the product shape and size requirements, and improve the forming quality of the pile tip flap product. The positioning member 3 is located on the top surface of the forming surface 11 and is adapted to the positioning hole in the middle of the pile tip flap blank, so that the forming quality of the produced pile tip flap is high.

[0029] Please refer to Figure 3-6As shown, the top mold assembly includes a top mold base 2, a lifting mechanism 5 connected to the top mold base 2 for driving the top mold base 2 to move close to or away from the bottom mold 1, the top mold base 2 is provided with a local inner conical surface 21 that is conformed to the molding surface 11, and a pile tip flap molding cavity a is formed between the molding surface 11 and the local inner conical surface 21. The positioning hole of the fan-shaped flat pile tip flap blank is aligned with the positioning member 3 of the bottom mold 1, and the pile tip flap blank is positioned and installed on the bottom mold 1. The lifting mechanism 5 drives the top mold base 2 to move close to the bottom mold 1 to close the bottom mold 1, and the local inner conical surface 21 cooperates with the molding surface 11 to press the pile tip flap blank into a conical pile tip flap. The lifting mechanism 5 can be a telescopic cylinder or a telescopic hydraulic cylinder or a linear motor or a ball screw, etc.

[0030] Please refer to Figure 6 As shown, the pile tip valve forming mold also includes a frame 6, a lifting mechanism 5 is installed on the top of the frame 6, and the top mold assembly also includes a connecting plate 4 connected to the top mold base 2, the connecting plate 4 is connected to the top mold base 2 through a connecting piece 41, and the connection method thereof can be a snap connection or a screw connection, the connecting plate 4 is connected to the lifting mechanism 5, and the lifting mechanism 5 is preferably a cylinder, and the connecting plate 4 is connected to the output end of the cylinder.

[0031] Please refer to Figure 3-4 As shown, the positioning member 3 includes a positioning column, and the bottom mold 1 is provided with a mounting hole 12 for mounting the positioning column, so that the positioning column can be detachably mounted on the bottom mold 1, and the positioning column and the bottom mold 1 can be fixed by screwing, clamping, bonding, welding, or magnetic connection, etc. Specifically, for example, the inner wall of the mounting hole 12 is provided with an internal thread, and the end of the positioning column is provided with an external thread that matches the internal thread. Alternatively, a split card assembly that can be elastically retracted in the radial direction and spliced ​​to form a ring is provided in the mounting hole 12, and when the lower end of the positioning column is inserted into the split card assembly, the split card assembly can clamp the positioning column to prevent the positioning column from falling out of the mounting hole 12. Alternatively, the inner cavity of the mounting hole 12 is a stepped shape that is smaller at the top and larger at the bottom, so that a step is formed on the inner wall of the mounting hole 12, and a connecting sleeve is installed at the end of the positioning column. The connecting sleeve includes a tubular connecting portion and an elastic portion that are connected to each other. The tubular connecting portion is connected to the end of the positioning column. The elastic portion includes a plurality of spring sheets distributed in a ring shape, and there is a gap between two adjacent spring sheets. When the positioning column is inserted into the mounting hole 12 together with the elastic clamp, the plurality of spring sheets of the elastic clamp first shrink inward to smoothly cross the step, and then expand outward to abut against the step to prevent the positioning column from detaching from the mounting hole 12. Alternatively, an adhesive is filled into the mounting hole 12, and the positioning column is bonded and fixed to the bottom mold 1 by the adhesive. The adhesive can be an epoxy resin. Preferably, the mounting hole 12 is an elongated hole, and the positioning column can be installed at any position along the length direction of the elongated hole to avoid being unable to be installed on the bottom mold 1 due to deviation in the position of the positioning hole on the pile tip valve blank.

[0032] In addition to being assembled and connected with the bottom mold 1, the positioning column can also be integrally formed with the bottom mold 1, eliminating the step of installing the positioning column. Alternatively, the bottom mold 1 is not provided with a mounting hole 12, and the positioning column is bonded, magnetically connected, or welded to the top surface of the bottom mold 1. The cross-sectional shape and size of the positioning column are compatible with the shape and size of the positioning hole.

[0033] Preferably, in order to better position and install the pile tip flap blank on the bottom mold 1 and prevent the pile tip flap blank from shifting during processing, the top surface of the bottom mold 1 is provided with a plurality of positioning members 3 arranged at intervals and in a row.

[0034] The height of the positioning member 3 protruding from the molding surface 11 is less than the wall thickness of the pile tip flap blank, so that the positioning hole does not need to penetrate the pile tip flap blank, or the height of the positioning member 3 protruding from the molding surface 11 is greater than or equal to the wall thickness of the pile tip flap blank, so that the positioning member 3 penetrates the pile tip flap blank. When the height of the positioning member 3 protruding from the molding surface 11 is greater than the wall thickness of the pile tip flap blank, the top mold base 2 is provided with an avoidance hole 22 for the positioning member 3 to enter, and the number and setting position of the avoidance hole 22 correspond to the number and setting position of the positioning member 3.

[0035] Please refer to Figure 7 As shown, preferably, a heating component is provided in the top mold base 2, and the pile tip valve blank is softened by the heating component to facilitate molding. The heating component can be a heating chamber 23 provided inside the top mold base 2 and close to the local inner conical surface 21. The heating chamber 23 is conical and matches the local inner conical surface 21. A heating pipe 24 is provided in the heating chamber 23, and the heating pipe 24 is connected to an external power supply to heat the top mold base 2. Alternatively, the heating chamber 23 has an inlet connected to the outside, and high-temperature steam or high-temperature liquid is injected into the heating chamber 23 through the inlet to heat the top mold base 2. Of course, a heating component can also be provided on the side of the bottom mold 1 close to the molding surface, or heating components can be provided in both the bottom mold 1 and the top mold base 2.

[0036] Please refer to Figure 6 As shown, preferably, in order to guide the lifting and lowering movement of the top mold base 2, one of the bottom mold 1 and the top mold assembly is provided with a guide column, and the other of the bottom mold 1 and the top mold assembly is provided with a guide groove, and the guide column can be inserted into the guide groove. In order to facilitate the arrangement of the guide column or the guide groove on the bottom mold 1, a bottom plate 13 is provided at the bottom of the bottom mold 1, and one of the connecting plate 4 and the bottom plate 13 is provided with a guide column 42, and the other of the connecting plate 4 and the bottom plate 13 is provided with a guide groove. In this embodiment, the connecting plate 4 is provided with a guide column 42, and the bottom plate 13 is provided with a column 14 vertically aligned with the guide column 42. The top of the column 14 is concave downwardly provided with a guide groove, and the length of the guide groove is preferably greater than the vertical movement distance of the column 14. When the top mold assembly moves toward the side close to the bottom mold, the guide column 42 moves vertically along the guide groove.

[0037] <Example 2>

[0038] The same parts in this embodiment as those in the first embodiment are given the same figure marks, and the same text descriptions are omitted.

[0039] Please refer to Figure 6 and Figure 8 As shown, the difference between the pile tip valve forming mold of this embodiment and the embodiment 1 is mainly that the structure of the top mold base 2 is different, and the connection relationship between other structures and components is the same. The top mold assembly of this embodiment includes a top mold base 2, a lifting mechanism connected to the top mold base 2 for driving the top mold base 2 to move closer to or away from the bottom mold, and the lifting mechanism can be a telescopic cylinder or a telescopic hydraulic cylinder or a linear motor or a ball screw, etc. The top mold base 2 is provided with an inner conical surface 25 that is roughly adapted to the shape of the forming surface 11, and the inner conical surface 25 is embedded with an electromagnetic forming coil 26. The top mold assembly also includes a power module (not shown) for supplying power to the electromagnetic forming coil 23. The taper of the inner conical surface 25 can be the same as the taper of the forming surface 11, or the taper of the inner conical surface 25 can be slightly larger than the taper of the forming surface 11. The power module supplies power to the electromagnetic forming coil 26, driving the electromagnetic forming coil 26 to generate a pulse magnetic field around the pile tip flap blank, generating induced eddy currents, and the pile tip flap blank is deformed toward the forming surface 11 under the action of the electromagnetic force. The lifting mechanism drives the electromagnetic forming coil 26 to gradually approach the bottom mold 1 until the pile tip flap blank is deformed and completely fits the forming surface 11. The use of electromagnetic pulse forming can achieve high-speed deformation of the pile tip flap blank and reduce the rebound of the pile tip flap finished product, which is beneficial to improving the molding quality of the pile tip flap finished product.

[0040] The above is a detailed introduction to the pile tip flap forming mold provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. The pile tip valve forming mold is characterized by: It includes a bottom mold and a top mold assembly, the bottom mold is provided with a molding surface that protrudes outward and is at least partially conical, the top surface of the molding surface is provided with at least one positioning piece, the positioning piece protrudes from the molding surface and is adapted to the positioning hole on the pile tip flap blank to position and install the middle part of the pile tip flap blank on the molding surface.

2. The pile tip valve forming mold according to claim 1, characterized in that: The top mold assembly includes a top mold base and a lifting mechanism connected to the top mold base for driving the top mold base to move closer to or away from the bottom mold. The top mold base is provided with a local inner conical surface that is conformally matched to the molding surface, and a pile tip valve molding cavity is formed between the molding surface and the local inner conical surface.

3. The pile tip valve forming mold according to claim 2, characterized in that: The top mold base is provided with an avoidance hole for the positioning piece to enter; And / or, a heating component is provided in the top mold base.

4. The pile tip valve forming mold according to claim 1, characterized in that: The top mold assembly includes a top mold base, a lifting mechanism connected to the top mold base for driving the top mold base to move closer to or away from the bottom mold, the top mold base is provided with a local inner conical surface that is roughly adapted to the shape of the forming surface, and the local inner conical surface is embedded with an electromagnetic forming coil. The top mold assembly also includes a power module for supplying power to the electromagnetic forming coil.

5. The pile tip valve forming mold according to claim 4, characterized in that: The top mold seat is provided with an avoidance hole for the positioning piece to enter.

6. The pile tip valve forming mold according to claim 1, characterized in that: A heating component is provided in the bottom mold; And / or, the height of the positioning piece protruding from the forming surface is less than the wall thickness of the pile tip valve blank.

7. The pile tip valve forming mold according to claim 1, characterized in that: One of the bottom mold and the top mold assembly is provided with a guide column, and the other of the bottom mold and the top mold assembly is provided with a guide groove, and the guide column can be inserted into the guide groove.

8. The pile tip valve forming mold according to claim 1, characterized in that: The positioning member comprises a positioning column, and the bottom mold is provided with a mounting hole for mounting the positioning column.

9. The pile tip valve forming mold according to claim 1, characterized in that: The positioning member includes a positioning column, and the positioning column and the bottom mold are integrally formed, or the positioning column and the top surface of the bottom mold are bonded, magnetically connected, or welded.

10. The pile tip valve forming mold according to claim 1, characterized in that: The top surface of the bottom mold is provided with a plurality of the positioning members which are arranged at intervals and in a row.

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