A spiral blade secondary shaping die, a shaping mechanism and a shaping process

Abstract

The present application relates to a kind of spiral blade secondary shaping mould, shaping mechanism and shaping process, spiral blade secondary shaping mould includes upper module, lower module and top piece block, the lower module is located below the upper module, the lower surface of upper module has upper spiral blade forming surface, the upper surface of lower module has first lower spiral blade forming surface, the top piece block can be driven up and down movement and be arranged in the accommodating cavity of lower module, the upper surface of top piece block has second lower spiral blade forming surface, the second lower spiral blade forming surface can be docked with first lower spiral blade forming surface to form lower spiral blade forming surface;Wherein, the upper spiral blade forming surface and the lower spiral blade forming surface are arranged oppositely up and down.This kind of spiral blade secondary shaping mould of the present application, by setting upper module, lower module and top piece block, for already partly formed spiral blade, secondary shaping can be realized, further ensure spiral blade forming surface precision.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of agricultural machinery, in particular to a spiral blade secondary shaping die, a shaping mechanism and a shaping process. BACKGROUND

[0002] As one of the core components of large-scale harvesters, the manufacturing process and precision of the feeding blades in the axial flow cylinder assembly are very critical.

[0003] The blade is located at the feeding part of the front end of the axial flow cylinder assembly, the blade is spiral, and the circumference is welded on the surface of the feeding cone. The grain in the machine body is screened and distributed, so the importance of the forming efficiency and the precision of the part of the blade gradually emerges.

[0004] The spiral blade is also called a spiral blade, which has an inner and outer spiral shape. A plurality of spiral blades are welded together to form a continuous spiral, which is the main accessory of a spiral conveyor. The spiral blade has a long history and various processing methods. In terms of processing methods, there are generally the following several kinds: die pressing, stretching, and extrusion. First, die pressing. It is also a kind of casting. A model of the spiral blade to be made is made, then the material for pouring is selected, and finally the finished spiral part is obtained. This method has good production cost and is only suitable for mass production. Therefore, the application of this method is not very common. Second, hydraulic stretching method. A ring is cut from a steel plate according to the calculated size, then a slit is cut on the ring, and a pre-made clamp is used to tighten the two sides of the ring. Start the hydraulic cylinder to make the two sides of the ring move up and down to separate. When it reaches a certain degree, measure the pitch of the spiral blade according to the size. The measured pitch is larger than the actual pitch because the steel plate will shrink to a certain extent after the hydraulic cylinder is loosened. After obtaining the correct pitch, the required spiral blade is obtained. This method is widely used and does not require a die. It has a faster processing speed. Its disadvantage is that the shape of the stretched spiral is irregular and the size error of the spiral is relatively large. Third, extrusion method. This method is similar to die pressing and is an improved pressing method. Before making the spiral part, a set of mold with the same size as the finished product needs to be made. The mold is divided into two parts with the same shape and size, which are placed on the upper and lower parts of the press, respectively. Then place the ring filled with materials on the mold, and start the press to press the upper and lower molds together. The steel plate becomes spiral-shaped accordingly, but there are problems of poor forming surface precision and contour precision. SUMMARY

[0005] In order to solve one or several technical problems existing in the prior art, the present application provides a spiral blade secondary shaping die, a shaping mechanism and a shaping process.

[0006] The technical scheme for solving the above technical problems of the present application is as follows: a spiral blade secondary shaping mold, comprising an upper mold block, a lower mold block and a top piece block, the lower mold block is located below the upper mold block, the lower surface of the upper mold block is provided with an upper spiral blade forming surface, the upper surface of the lower mold block is provided with a first lower spiral blade forming surface, the top piece block is arranged in a containing cavity of the lower mold block and can be driven to move up and down, the upper surface of the top piece block is provided with a second lower spiral blade forming surface, and the second lower spiral blade forming surface can be connected with the first lower spiral blade forming surface to form a lower spiral blade forming surface; wherein the upper spiral blade forming surface and the lower spiral blade forming surface are arranged oppositely.

[0007] The beneficial effects of the present application are as follows: the spiral blade secondary shaping mold of the present application can realize secondary shaping for the partially formed spiral blade by arranging the upper mold block, the lower mold block and the top piece block, and further ensures the spiral blade forming surface precision. The process scheme of press forming is adopted, and is suitable for the curved surface forming of various carbon steel materials under the condition that the tonnage of the press is allowed.

[0008] On the basis of the above technical scheme, the present application can also be improved as follows.

[0009] Further, the lower surface of the upper mold block is further provided with a first reverse side plate, the upper surface of the lower mold block is provided with a second reverse side plate, the first reverse side plate is provided with a first limiting surface, the second reverse side plate is provided with a second limiting surface, the first limiting surface faces away from one side of the starting end of the lower spiral blade forming surface, and when the upper mold block and the lower mold block are closed, the first limiting surface and the second limiting surface are in contact and extruded.

[0010] The beneficial effects of the above further scheme are as follows: by arranging the first reverse side plate and the second reverse side plate, the two reverse side plates cooperate to offset the lateral force generated by the mold forming, ensure the force balance inside the mold, and prevent the mold from moving.

[0011] Further, the upper surface of the lower mold block is further provided with a limiting plate, the limiting plate extends below the containing cavity and is limited by the outer peripheral side wall of the top piece block.

[0012] The beneficial effects of the above further scheme are as follows: the arrangement of the limiting plate avoids the top piece block from being taken out of the containing cavity.

[0013] Further, the two sides of the second lower spiral blade forming surface of the top piece block are respectively provided with positioning blocks.

[0014] The beneficial effects of the above further scheme are as follows: the arrangement of the positioning blocks ensures the final contour precision of the spiral blade.

[0015] Further, the lower surface of the upper module is provided with an upper die insert, the lower surface of the upper die insert is provided with the upper spiral blade forming surface, and the lower surface of the upper die insert is further provided with an avoiding groove, which is arranged on both sides of the upper spiral blade forming surface and corresponds to the positioning block in the up-down direction.

[0016] The avoiding groove is arranged to avoid the positioning block, thereby ensuring the stamping fit degree.

[0017] Further, the side wall of the accommodating cavity is provided with a first guide element, the outer peripheral side wall of the top piece block is provided with a second guide element, and the first guide element and the second guide element are matched to enable the top piece block to move up and down and in and out of the accommodating cavity.

[0018] The two guide elements are matched to facilitate the up-down movement of the top piece block.

[0019] Further, the lower surface of the upper module is provided with a vertically arranged guide block, the upper surface of the lower module is provided with a guide cavity, and the guide block is adaptively inserted into the guide cavity to guide the up-down movement between the upper module and the lower module.

[0020] The guide block and the guide cavity are matched to enable the up-down guiding movement between the upper die seat and the lower die seat.

[0021] Further, the upper spiral blade forming surface and the lower spiral blade forming surface are in the same spiral structure, and the bottom surface of the top piece block is provided with a plurality of top rod pads.

[0022] A spiral blade secondary shaping mechanism comprises the spiral blade secondary shaping die, a machine tool top rod and a driving mechanism, the machine tool top rod passes through the lower module from bottom to top and is connected with the bottom of the top piece block, and the driving end of the driving mechanism is connected with the upper module and drives the up-down movement of the upper module.

[0023] The spiral blade secondary shaping mechanism can be applied to the stamping forming scheme of thick plate curved surface twisted parts and thin plate materials, and can improve the shaping precision of partially formed spiral blades.

[0024] A spiral blade secondary shaping process is realized by using the spiral blade secondary shaping mechanism, and comprises the following steps: placing a partially shaped plate to be shaped on a second lower spiral blade forming surface on the upper surface of the top piece block, driving the upper mold block to move downward by using the driving mechanism, the upper spiral blade forming surface on the upper mold block being in contact with the second lower spiral blade forming surface and pushing the top piece block to move downward until the second lower spiral blade forming surface is in butt joint with the first lower spiral blade forming surface, so that the unshaped part of the plate to be shaped is extruded and shaped between the first lower spiral blade forming surface and the upper spiral blade forming surface.

[0025] The spiral blade forming process has the advantages that the spiral blade forming process can perform secondary shaping on a partially shaped spiral blade, and the forming precision is high. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 Fig. 6 is a schematic view of the three-dimensional structure of the upper mold block and the lower mold block after clamping;

[0027] Figure 2 Fig. 7 is a schematic view of the three-dimensional structure of the lower mold block;

[0028] Figure 3 Fig. 8 is a schematic view of the three-dimensional structure of the top piece block;

[0029] Figure 4 Fig. 9 is a schematic view of the three-dimensional structure of the upper mold block.

[0030] In the drawings, the components represented by the respective reference numerals are listed as follows:

[0031] 600, upper mold block; 601, upper spiral blade forming surface; 602, first reverse side plate; 603, first limiting surface; 605, upper mold insert; 606, avoiding groove; 607, guide block;

[0032] 700, lower mold block; 701, top piece block; 702, first lower spiral blade forming surface; 703, second lower spiral blade forming surface; 704, accommodating cavity; 705, second reverse side plate; 706, second limiting surface; 707, positioning block; 708, first guide piece; 709, second guide piece; 710, guide cavity; 711, top rod pad; 712, limiting plate. DETAILED DESCRIPTION

[0033] The principles and characteristics of the present application are described below in combination with the drawings, and the examples are only used to explain the present application and are not used to limit the scope of the present application.

[0034] As Figures 1-4As shown, the spiral vane secondary shaping mold of the embodiment comprises an upper mold block 600, a lower mold block 700 and a top piece block 701, the lower mold block 700 is located below the upper mold block 600, the lower surface of the upper mold block 600 is provided with an upper spiral vane forming surface 601, the upper surface of the lower mold block 700 is provided with a first lower spiral vane forming surface 702, the top piece block 701 is arranged in a containing cavity 704 of the lower mold block 700 and can be driven to move up and down, the upper surface of the top piece block 701 is provided with a second lower spiral vane forming surface 703, the second lower spiral vane forming surface 703 can be butted with the first lower spiral vane forming surface 702 to form a lower spiral vane forming surface; wherein the upper spiral vane forming surface 601 and the lower spiral vane forming surface are arranged oppositely.

[0035] As shown in the drawings, Figure 2 and Figure 4 As shown, the lower surface of the upper mold block 600 of the embodiment is further provided with a first reverse side plate 602, the upper surface of the lower mold block 700 is provided with a second reverse side plate 705, the first reverse side plate 602 is provided with a first limiting surface 603, the second reverse side plate 705 is provided with a second limiting surface 706, the first limiting surface 603 is directed to a side away from the starting end of the lower spiral vane forming surface, when the upper mold block 600 and the lower mold block 700 are closed, the first limiting surface 603 and the second limiting surface 706 are in contact and extruded. By arranging the first reverse side plate and the second reverse side plate, the two reverse side plates cooperate to offset the lateral force generated by the mold forming, ensure the balance of internal force of the mold, and prevent the mold from moving.

[0036] As shown in the drawings, Figure 2 As shown, the upper surface of the lower mold block 700 of the embodiment is further provided with a limiting plate 712, the limiting plate 712 extends into the lower part of the containing cavity 704 and is limited by the outer peripheral side wall of the top piece block 701. The limiting plate is arranged to prevent the top piece block from being pulled out of the containing cavity.

[0037] As shown in the drawings, Figure 3 As shown, the two sides of the second lower spiral vane forming surface 703 of the top piece block 701 of the embodiment are respectively provided with positioning blocks 707. The arrangement of the positioning blocks ensures the final profile accuracy of the spiral vane.

[0038] As shown in the drawings, Figure 4 As shown, the lower surface of the upper mold block 600 of the embodiment is provided with an upper mold insert 605, the lower surface of the upper mold insert 605 is provided with the upper spiral vane forming surface 601, the lower surface of the upper mold insert 605 is further provided with an avoiding groove 606, the avoiding groove 606 is located on the two sides of the upper spiral vane forming surface 601 and is arranged correspondingly above and below the positioning blocks 707. The arrangement of the avoiding groove can avoid the positioning blocks and ensure the stamping fit.

[0039] AsFigure 2 and Figure 3 As shown in

[0040] As shown in Figure 2 and Figure 4 As shown in

[0041] As shown in Figures 2-4 The bottom surface of the top piece block 701 is provided with a plurality of top rod pads 711.

[0042] Specifically, the lower module 700 of the embodiment is mainly used to carry the lower mold insert and the top piece block 701. The upper surface of the lower mold insert is provided with a first lower spiral blade forming surface 702. The lower mold insert and the top piece block 701 cooperate to perform secondary shaping on the partially formed spiral blade. The function of the top piece block 701 is to support the spiral forming part of the partially formed spiral blade, and cooperate with the upper mold insert to press the formed part of the spiral blade during the entire secondary shaping process.

[0043] The spiral blade secondary shaping mold of the embodiment can realize secondary shaping on the partially formed spiral blade by setting the upper mold module, the lower mold module and the top piece block, and further ensure the spiral blade forming surface precision. The process scheme of press forming is adopted, which is suitable for the curved surface forming of various carbon steel materials under the condition that the tonnage of the press is allowed.

[0044] The embodiment further provides a spiral blade secondary shaping mechanism, which comprises the spiral blade secondary shaping mold and further comprises a machine tool top rod and a driving mechanism. The machine tool top rod passes through the lower mold module 700 from bottom to top and is connected with the bottom of the top piece block 701. The driving end of the driving mechanism is connected with the upper mold module 600 and drives the upper mold module 600 to move up and down.

[0045] The spiral blade secondary shaping mechanism of the embodiment is not only suitable for the stamping forming scheme of thick plate curved surface twisted parts, but also suitable for thin plate, and can well improve the shaping precision of partially formed spiral blades. By adopting the scheme of pressing material first and then forming, and positioning by positioning blocks, fluctuation of parts in the forming process can be avoided.

[0046] The embodiment also provides a spiral blade secondary shaping process, which is realized by using the spiral blade secondary shaping mechanism, and includes the following steps: placing a partially formed shaping part of a plate to be shaped on the second lower spiral blade shaping surface 703 on the upper surface of the top block 701 (the partially formed shaping part of the plate to be shaped is attached to the second lower spiral blade shaping surface 703, and the unformed part is in a flat plate structure), driving the upper module 600 to move downward by using a driving mechanism, contacting and pressing the upper spiral blade shaping surface 601 on the upper module 600 with the second lower spiral blade shaping surface 703, and pushing the top block 701 to move downward until the second lower spiral blade shaping surface 703 is connected with the first lower spiral blade shaping surface 702, so that the unformed part of the plate to be shaped is extruded and formed between the first lower spiral blade shaping surface 702 and the upper spiral blade shaping surface 601.

[0047] The spiral blade forming process of the embodiment can perform secondary shaping on partially formed spiral blades, and has high forming precision. The spiral blade forming process of the embodiment is not only suitable for the stamping forming scheme of thick plate curved surface twisted parts, but also suitable for thin plate. By using the process scheme of pressing and forming, the scheme is suitable for curved surface forming of various carbon steel materials under the condition that the tonnage of the press is allowed. By using the process of secondary shaping or multi-sequence separate pressing and forming, the positioning of the parts in the forming process and the control of the forming process are ensured. The experimental block (castings or 45 steel) is used in the forming process, which not only reduces the cost of mold debugging, but also speeds up the mold debugging progress and shortens the mold manufacturing cycle.

[0048] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0049] In addition, the terms "first", "second", etc. are used only for the purpose of description and do not imply or imply relative importance or imply the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0051] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0052] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or features of different embodiments or examples described in the present application without contradiction.

[0053] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A secondary shaping mold for spiral blades, characterized in that, The device includes an upper module, a lower module, and a top component block. The lower module is located below the upper module. The lower surface of the upper module is provided with an upper mold insert, and the lower surface of the upper mold insert has an upper helical blade forming surface. The lower module is used to support the lower mold insert and the top component block. The upper surface of the lower mold insert is provided with a first lower helical blade forming surface. The top component block is disposed in the receiving cavity of the lower module and can be driven to move up and down. The upper surface of the top component block has a second lower helical blade forming surface. The top component block cooperates with the upper mold insert to press down the formed part of the helical blade. The second lower helical blade forming surface can mate with the first lower helical blade forming surface to form a lower helical blade forming surface. The upper helical blade forming surface and the lower helical blade forming surface have the same spiral structure. The upper helical blade forming surface and the lower helical blade forming surface are arranged vertically opposite to each other.

2. The secondary shaping mold for spiral blades according to claim 1, characterized in that, The lower surface of the upper module is also provided with a first reverse side plate, and the upper surface of the lower module is provided with a second reverse side plate. The first reverse side plate has a first limiting surface, and the second reverse side plate has a second limiting surface. The first limiting surface faces the side away from the starting end of the lower spiral blade forming surface. When the upper module and the lower module are molded together, the first limiting surface and the second limiting surface are in relative contact and squeezed.

3. The secondary shaping mold for spiral blades according to claim 1, characterized in that, The upper surface of the lower module is also provided with a limiting plate, which extends into the lower part of the receiving cavity and is adapted to limit the movement of the outer peripheral sidewall of the top block.

4. The secondary shaping mold for spiral blades according to claim 1, characterized in that, Positioning blocks are provided on both sides of the second lower spiral blade forming surface of the top component block.

5. The secondary shaping mold for spiral blades according to claim 4, characterized in that, The lower surface of the upper mold insert is also provided with a clearance groove, which is located on both sides of the upper spiral blade forming surface and is arranged vertically and vertically corresponding to the positioning block.

6. The secondary shaping mold for spiral blades according to claim 1, characterized in that, A first guide is provided on the side wall of the receiving cavity, and a second guide is provided on the outer peripheral side wall of the top block. The first guide and the second guide cooperate to enable the top block to move up and down and enter and exit the receiving cavity.

7. The secondary shaping mold for spiral blades according to claim 1, characterized in that, The lower surface of the upper module is provided with a vertically arranged guide block, and the upper surface of the lower module is provided with a guide cavity. The guide block is adapted to be inserted into the guide cavity to guide the up and down movement between the upper module and the lower module.

8. The secondary shaping mold for spiral blades according to claim 1, characterized in that, The bottom surface of the top component block is provided with multiple top rod pads.

9. A secondary shaping mechanism for helical blades, characterized in that, The invention includes a secondary forming mold for spiral blades as described in any one of claims 1 to 8, and further includes a machine tool push rod and a drive mechanism. The machine tool push rod passes through the lower module from bottom to top and is connected to the bottom of the top block. The drive end of the drive mechanism is connected to the upper module and drives the upper module to move up and down.

10. A secondary shaping process for helical blades, characterized in that, The secondary forming mechanism of the spiral blade as described in claim 9 is implemented by the following steps: placing the formed part of the partially formed sheet material to be formed on the second lower spiral blade forming surface on the upper surface of the top block, driving the upper module to move downward using the driving mechanism, the upper spiral blade forming surface on the upper module contacts and presses against the second lower spiral blade forming surface, and pushes the top block downward until the second lower spiral blade forming surface contacts the first lower spiral blade forming surface, so that the unformed part of the sheet material to be formed is squeezed and formed between the first lower spiral blade forming surface and the upper spiral blade forming surface.

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