Thinning stretching die

Abstract

The utility model discloses a thinning and stretching die. A workpiece comprises a bottom, an inclined part and a stretching part, a female die is arranged on the lower die base, and a floating plate capable of containing workpieces is arranged in the female die. A male die is arranged on the upper die base and matched with the female die, a first extrusion part and a second extrusion part are arranged at the end, close to the female die, of the male die, and when the male die does not make contact with the female die, the bottom and the inclined part are placed on the floating plate, and the stretching part is parallel to the bottom and placed on the upper surface of the female die; when the male die moves downwards towards the material floating plate, the inclined part makes contact with the first extrusion part, the male die presses the material floating plate to continuously move downwards, the stretching part makes contact with the second extrusion part gradually, the stretching part enters an extrusion gap between the second extrusion part and the inner wall of the female die, and materials of the stretching part flow upwards, so that the thickness of the stretching part is extruded and thinned; according to the thinning and stretching die, a machining mode is omitted, the local structure of a workpiece is directly thinned and formed through the die, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of forming dies, and in particular relates to a thinning and stretching die. Background Art

[0002] The description in this section merely provides background information related to the disclosure of the present utility model and does not constitute prior art.

[0003] The existing technology is to directly stretch and flange the product in the mold, and then machine the local shape of the product to make the local wall thickness of the product thinner. In this solution, the product still needs to be machined after being formed in the mold, which has low production efficiency, high labor costs and processing costs, and a long production and processing cycle.

[0004] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of the utility model and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because these solutions are described in the background technology section of the utility model. Utility Model Content

[0005] In order to overcome the defects in the prior art, the utility model provides a thinning and stretching die, which is used to directly thin and shape the local structure of a workpiece.

[0006] The utility model discloses a thinning and stretching die, comprising:

[0007] A workpiece, the workpiece comprising a bottom, an inclined portion and a stretching portion, the two stretching portions are connected to two ends of the bottom through the inclined portion, and the distance between the two stretching portions is greater than the distance between the two ends of the bottom;

[0008] A lower die unit, the lower die unit comprising a lower die base, the lower die base being provided with a concave die, the concave die being provided with a floating plate capable of placing a workpiece;

[0009] An upper die unit, the upper die unit is arranged above the lower die unit and cooperates with it, the upper die unit includes an upper die seat, a punch is arranged on the upper die seat, the punch is cooperated with the die, a first extrusion part and a second extrusion part are arranged at one end of the punch close to the die, the diameter of the first extrusion part is smaller than the diameter of the second extrusion part, and there is an extrusion gap between the second extrusion part and the inner wall of the die;

[0010] Among them, when the punch is not in contact with the die, the bottom and the inclined portion are placed on the floating plate, and the stretching portion is parallel to the bottom and placed on the upper surface of the die; when the punch moves downward toward the floating plate, the inclined portion contacts the first extrusion portion, and the punch presses the floating plate to continue moving downward, and the stretching portion gradually contacts the second extrusion portion, and the stretching portion enters the extrusion gap between the second extrusion portion and the inner wall of the die, and the material of the stretching portion flows upward, so that the thickness of the stretching portion is extruded and thinned.

[0011] Furthermore, in the above-mentioned thinning and stretching die, after the stretching portion is squeezed by the second extrusion portion and the inner wall of the groove, the thickness of the stretching portion is smaller than the thickness of the inclined portion.

[0012] Furthermore, in the above-mentioned thinning and stretching mold, the height of the floating plate is smaller than the height of the concave mold.

[0013] Furthermore, in the above-mentioned thinning and stretching die, the upper surface of the floating plate has a supporting surface corresponding to the bottom and a convex portion corresponding to the inclined portion, and the convex portion is arranged around the supporting surface.

[0014] Furthermore, in the above-mentioned thinning and stretching mold, the upper mold unit also includes: an upper clamping plate and an upper stripping plate which are sequentially arranged by the upper mold base toward the lower mold unit, and the punch passes through the upper clamping plate and the upper stripping plate to match the die.

[0015] Furthermore, in the above-mentioned thinning and stretching mold, the upper mold base is installed on the upper support plate through a group of upper feet, and the lower surface of the upper support plate is provided with an elastic member and an upper push rod, the upper push rod passes through the upper mold base and is embedded in the punch, and the elastic member passes through the upper mold base and the upper clamping plate and is connected to the upper release plate.

[0016] Furthermore, in the above-mentioned thinning and stretching mold, the lower mold base is installed on the lower support plate through a group of lower pads, and the upper surface of the lower support plate is provided with an elastic member and a lower push rod abutting the top of the elastic member, and the lower push rod passes through the lower mold base and is connected to the floating plate.

[0017] It can be seen from the above technical solution that the utility model has the following beneficial effects:

[0018] The thinning and stretching die described in the utility model, under the joint action of the male die and the female die, squeezes and thins the thickness of the stretching part in the workpiece, and at the same time increases the height of the stretching part while thinning the wall thickness of the stretching part to achieve the expected required height size. In the operation of thinning the part of the workpiece, the machining method is eliminated, and the workpiece is directly thinned and formed by the die, so that the production efficiency is effectively improved, the labor cost and processing cost are effectively reduced, and the production and processing cycle is shortened accordingly.

[0019] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of a die for thinning and stretching in an embodiment of the utility model;

[0022] Figure 2 It is a schematic diagram of a workpiece after thinning and stretching in an embodiment of the utility model;

[0023] Figure 3 It is a schematic diagram of the bottom and inclined portion of the workpiece in the embodiment of the utility model;

[0024] Figure 4 It is a schematic diagram of the stretching portion of the workpiece before processing in the embodiment of the utility model;

[0025] Figure 5 It is a schematic diagram of the stretching portion of a workpiece during processing in an embodiment of the present utility model.

[0026] The figure marks of the above drawings are: 1. workpiece; 11. bottom; 12. inclined portion; 13. stretching portion; 2. lower die unit; 21. lower die seat; 22. die; 23. floating plate; 24. lower pad; 25. lower support plate; 26. lower ejector rod; 3. upper die unit; 31. upper die seat; 32. punch; 321. first extrusion portion; 322. second extrusion portion; 33. upper pad; 34. upper support plate; 35. upper clamping plate; 36. upper stripping plate; 37. upper ejector rod; 4. elastic member. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] It should be noted that in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and to distinguish similar objects. There is no order of precedence between the two, and they cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0029] The utility model is described in detail below with reference to the accompanying drawings and embodiments.

[0030] Reference Figures 1 to 5 , this embodiment provides a thinning and stretching die, comprising:

[0031] A workpiece 1, comprising a bottom 11, an inclined portion 12 and a stretching portion 13, wherein two stretching portions 13 are connected to two ends of the bottom 11 through the inclined portion 12, and a distance between the two stretching portions 13 is greater than a distance between two ends of the bottom 11;

[0032] A lower die unit 2, the lower die unit 2 comprising a lower die base 21, a concave die 22 being provided on the lower die base 21, a floating plate 23 capable of placing the workpiece 1 being provided in the concave die 22;

[0033] An upper die unit 3, the upper die unit 3 is arranged above the lower die unit 2 and cooperates therewith, the upper die unit 3 comprises an upper die seat 31, a punch 32 is arranged on the upper die seat 31, the punch 32 is cooperated with the die 22, a first extrusion portion 321 and a second extrusion portion 322 are arranged at one end of the punch 32 close to the die 22, the diameter of the first extrusion portion 321 is smaller than the diameter of the second extrusion portion 322, and an extrusion gap exists between the second extrusion portion 322 and the inner wall of the die 22;

[0034] Among them, refer to Figure 4 , when the male mold 32 is not in contact with the female mold 22, the bottom 11 and the inclined portion 12 are placed on the floating plate 23, and the stretching portion 13 is parallel to the bottom 11 and is placed on the upper surface of the female mold 22; Figure 5 When the punch 32 moves downward toward the floating plate 23, the inclined portion 12 contacts the first extrusion portion 321, and the punch 32 presses the floating plate 23 to continue to move downward, and the stretching portion 13 gradually contacts the second extrusion portion 322, and the stretching portion 13 enters the extrusion gap between the second extrusion portion 322 and the inner wall of the die 22, and the material of the stretching portion 13 flows upward, so that the thickness of the stretching portion 13 is extruded and thinned, and the following is obtained. Figure 2The workpiece 1 at this time has the bottom 11 and the inclined portion 12 as before, and the position of the stretching portion 13 has changed. The stretching portion 13 is perpendicular to the direction of the bottom 11, and the distance between the two stretching portions 13 is still greater than the distance between the two ends of the bottom 11. Specifically, in this embodiment, after the stretching portion 13 is squeezed by the second extrusion portion 322 and the inner wall of the groove, the thickness of the stretching portion 13 is less than the thickness of the inclined portion 12, and the stretching portion 13 of the workpiece 1 is directly thinned and formed in the mold, which saves the cost of the machining thinning process and improves the production efficiency.

[0035] Specifically, in this embodiment, the height of the floating plate 23 is smaller than the height of the die 22 , and under the action of the lower ejector rod 26 and the elastic member 4 in the lower die unit, the floating plate 23 can float up and down in the die 22 .

[0036] Specifically, in this embodiment, the upper surface of the floating plate 23 has a supporting surface corresponding to the bottom 11 and a convex portion corresponding to the inclined portion 12, and the convex portion is arranged around the supporting surface, and the supporting surface and the bottom end of the punch 32 act together on the bottom 11 of the workpiece 1, and the convex portion and the first extrusion portion 321 act together on the inclined portion 12 of the workpiece 1.

[0037] Specifically, in the present embodiment, the upper mold unit 3 further includes: an upper clamping plate 35 and an upper stripping plate 36 which are sequentially arranged on the upper mold base 31 toward the lower mold unit 2, the punch 32 passes through the upper clamping plate 35 and the upper stripping plate 36 and matches the die 22, a guide column is provided between the lower mold unit 2 and the upper mold unit 3, and a fixing plate is provided between the upper stripping plate 36 and the die.

[0038] Specifically, in this embodiment, the upper mold base 31 is installed on the upper support plate 34 through a group of upper feet 33, and the lower surface of the upper support plate 34 is provided with an upper push rod 37 and a plurality of elastic members 4, the upper push rod 37 passes through the upper mold base 31 and is embedded in the punch 32, and the elastic member 4 passes through the upper mold base 31 and the upper clamping plate 35 and is connected to the upper release plate 36.

[0039] Specifically, in this embodiment, the lower die base 21 is mounted on the lower support plate 25 through a group of lower pads 24, and the upper surface of the lower support plate 25 is provided with an elastic member 4 and a lower push rod 26 abutting against the top of the elastic member 4, and the lower push rod 26 penetrates the lower die base 21 and is connected to the floating plate 23. The elastic member 4 has the functions of buffering and shock absorption, energy storage and guidance, and can be a spring or other elastic element with elastic effect.

[0040] By the above structure, refer to Figure 3First, the bottom 11 and the inclined portion 12 of the workpiece 1 are formed in the mold, and then the bottom 11 and the inclined portion 12 of the workpiece 1 are placed on the floating plate 23. The stretching portion is parallel to the bottom 11 and is arranged on the upper surface of the die 22. The upper mold unit 3 moves downward, and the punch 32 and the floating plate 23 first press and fix the bottom 11 and the inclined portion 12 of the workpiece 1 to ensure that the bottom 11 and the inclined portion 12 are not deformed; when the punch 32 moves downward toward the floating plate 23, the inclined portion 12 contacts the first extrusion portion 321, and the punch 32 presses the floating plate 23 to continue to move downward, and the stretching portion 13 gradually contacts the second extrusion portion 322 Contact, after the stretching portion 13 contacts the inner wall of the die 22, the stretching portion 13 enters the extrusion gap between the second extrusion portion 322 and the inner wall of the die 22, and the material of the stretching portion 13 flows upward, and under the joint action of the punch 32 and the die 22, the thickness of the stretching portion 13 is extruded and thinned, and the height of the stretching portion 13 is increased while the wall thickness of the stretching portion 13 is thinned to reach the expected required height dimension. In this embodiment, in the operation of thinning the part of the workpiece 1, the machining method is cancelled, and the workpiece 1 is directly thinned and formed by a mold, which effectively improves the production efficiency, effectively reduces the labor cost and processing cost, and shortens the production and processing cycle.

[0041] The utility model uses specific embodiments to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the technical solution and core idea of ​​the utility model. At the same time, for ordinary technicians in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A die for thinning and stretching, characterized in that: include: A workpiece, the workpiece comprising a bottom, an inclined portion and a stretching portion, the two stretching portions are connected to two ends of the bottom through the inclined portion, and the distance between the two stretching portions is greater than the distance between the two ends of the bottom; A lower die unit, the lower die unit comprising a lower die base, the lower die base being provided with a concave die, the concave die being provided with a floating plate capable of placing a workpiece; An upper mold unit is arranged above the lower mold unit and cooperates therewith, and the upper mold unit includes an upper mold base, on which a punch is provided, and the punch is cooperated with the die. An end of the punch close to the die is provided with a first extrusion part and a second extrusion part, the diameter of the first extrusion part is smaller than the diameter of the second extrusion part, and there is an extrusion gap between the second extrusion part and the inner wall of the die.

2. The thinning and stretching die according to claim 1, characterized in that: After the stretching portion is squeezed by the second squeezing portion and the inner wall of the groove, the thickness of the stretching portion is smaller than the thickness of the inclined portion.

3. The thinning and stretching die according to claim 1, characterized in that: The height of the floating plate is smaller than the height of the concave mold.

4. The thinning and stretching die according to claim 3, characterized in that: The upper surface of the floating plate has a supporting surface corresponding to the bottom and a convex portion corresponding to the inclined portion, and the convex portion is arranged around the supporting surface.

5. The thinning and stretching die according to claim 1, characterized in that: The upper die unit further comprises: an upper clamping plate and an upper stripping plate which are sequentially arranged by the upper die base toward the lower die unit, and the convex die penetrates through the upper clamping plate and the upper stripping plate and matches with the concave die.

6. The ironing and stretching die according to claim 5, characterized in that: The upper die seat is installed on the upper support plate through a group of upper pads, and the lower surface of the upper support plate is provided with an elastic member and an upper push rod, the upper push rod passes through the upper die seat and is embedded in the punch, and the elastic member passes through the upper die seat and the upper clamping plate and is connected to the upper release plate.

7. The ironing and stretching die according to claim 1, characterized in that: The lower die seat is installed on the lower support plate through a group of lower pads, and the upper surface of the lower support plate is provided with an elastic member and a lower ejector rod abutting against the top of the elastic member, and the lower ejector rod passes through the lower die seat and is connected to the floating plate.

Images