Combustion chamber upper cover forming tool

Abstract

The utility model discloses a forming tool for an upper cover of a combustion chamber, which relates to the technical field of metal stamping and comprises a male die, a male die connecting plate, a female die and a female die connecting plate, and the female die and the male die are provided with an annular groove and an annular boss which are matched with the upper cover of the combustion chamber; a fit clearance between the male die and the female die is equal to the thickness of a blank material; at least two positioning pins I are arranged in the annular groove; the diameter and the position of the positioning pin I are matched with those of a mounting hole of the upper cover of the combustion chamber; and an ejection mechanism is arranged in the annular groove. According to the forming tool for the upper cover of the combustion chamber, the annular groove and the annular boss are arranged, so that edge folding forming of an inner hole and an outer circle of the upper cover of the combustion chamber is completed through one-time machining, the edge folding procedure for manufacturing parts of the upper cover of the combustion chamber is reduced, and high precision of the part machining process is guaranteed through the arrangement of the positioning pin; and the material ejecting mechanism is arranged, so that the formed workpiece can be smoothly ejected out of the tool, rapid material taking is achieved, and the formed workpiece can be conveniently separated from the male die.

Description

Technical Field

[0001] The utility model relates to the technical field of stamping metals, and more specifically, to a combustion chamber upper cover forming tool. Background Art

[0002] The combustion chamber of a turbojet engine always includes a key component, the combustion chamber cover. This component is usually annular in shape, and during its manufacture, the annular material blank is extruded, and the inner hole and outer circle are folded and formed separately to complete the preparation. The traditional forming method is to use two sets of tooling to complete the forming of this part, namely one set of tooling for forming the outer circle and one set of tooling for forming the inner hole. The utility model patent with the prior art announcement number CN206997438U discloses a door cover folding machine, which performs different folding operations on parts by replacing and adjusting the mold to reduce the number of devices and production costs. However, this device still cannot reduce the folding process in the preparation of the combustion chamber cover part, and the device lacks reliable positioning parts, which is not conducive to high-precision processing of parts.

[0003] In addition, under normal circumstances, the positioning of the material blank is mainly based on the outer contour positioning, but the outer contour positioning is easily affected by the external environment and is prone to displacement when the material is folded, making it difficult to ensure accurate positioning; and the combustion chamber cover is a thin-walled part. Under normal circumstances, the workpiece will produce plastic deformation after extrusion, and there will still be outward stress on the outer edge of the workpiece, which will jam the die, making it difficult to remove the workpiece, affecting the processing efficiency. Utility Model Content

[0004] An object of the present invention is to solve the above-mentioned problems and / or disadvantages and to provide advantages as will be described below.

[0005] In order to achieve these purposes and other advantages of the present invention, a combustion chamber upper cover forming tool is provided, comprising: a punch, a punch connecting plate for fixing the punch to the power output end of the hydraulic press, a die, and a die connecting plate for fixing the die to the work surface, wherein the die and punch are provided with an annular groove and an annular boss adapted to the combustion chamber upper cover;

[0006] The outer diameter of the annular groove is smaller than the outer ring diameter of the blank material, and the inner diameter of the annular groove is larger than the inner ring diameter of the blank material;

[0007] The fitting clearance between the punch and the die is the thickness of the blank material;

[0008] At least two positioning pins I are provided in the annular groove;

[0009] The bottom of the annular boss is provided with an avoidance hole adapted to the positioning pin I;

[0010] The diameter and position of the positioning pin I are adapted to the mounting hole of the combustion chamber upper cover;

[0011] A material ejecting mechanism is provided in the annular groove.

[0012] Preferably, the ejecting mechanism comprises: an ejecting rod and an elastic member sleeved on the ejecting rod to push the ejecting rod to move toward one side of the annular groove;

[0013] The die is provided with a stepped hole extending through the die, and the area of ​​the stepped hole on one side close to the annular groove is smaller than the area of ​​the hole on the other side;

[0014] The ejector rod is provided with a convex edge which is adapted to the step of the step hole to limit the lifting distance of the ejector rod.

[0015] Preferably, the side surface of the annular boss is configured to have a taper for facilitating stripping.

[0016] Preferably, the male mold and the male mold connecting plate are both provided with corresponding positioning holes II;

[0017] A positioning pin II is passed through the positioning hole II, and the positioning hole II is communicated with the avoidance hole.

[0018] Preferably, the die and the die connecting plate are both provided with corresponding positioning holes III;

[0019] A positioning pin III is passed through the positioning hole III.

[0020] The utility model includes at least the following beneficial effects: by arranging annular grooves and annular bosses, the inner hole and outer circle of the combustion chamber upper cover can be folded and formed in one process, thereby reducing the folding process in the preparation of the combustion chamber upper cover parts, and by arranging positioning pins to utilize the mounting holes arranged on the combustion chamber upper cover for positioning, the high precision of the parts processing process is ensured and the stability of the processing quality is improved; by arranging a ejecting mechanism, the formed workpiece can be smoothly ejected from the tooling to achieve rapid material removal, improve work efficiency, and facilitate the separation of the formed workpiece from the punch.

[0021] Other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of a combustion chamber upper cover forming tooling in one embodiment of the present utility model;

[0023] Figure 2 This is a cross-sectional view of a combustion chamber upper cover forming tool in one embodiment of the present utility model;

[0024] Figure 3 This is a schematic structural diagram of a punch die for forming a combustion chamber upper cover in one embodiment of the present utility model;

[0025] Figure 4 This is a schematic structural diagram of a combustion chamber upper cover in one embodiment of the present utility model.

[0026] Markings in the figure: 1. Punch, 11. Annular boss, 12. Avoidance hole, 13. Positioning hole II, 14. Positioning boss, 15. Taper, 2. Punch connecting plate, 3. Die, 31. Annular groove, 32. Positioning pin I, 33. Positioning hole I, 34. Positioning hole III, 4. Die connecting plate, 5. Ejecting mechanism, 51. Ejecting rod, 511. Protruding edge, 52. Elastic part, 6. Hexagon socket bolt, 7. Positioning pin II, 8. Positioning pin III, 9. Combustion chamber cover, 91. Mounting hole. DETAILED DESCRIPTION

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0028] It should be understood that the term "comprising" used herein does not recite the existence or addition of one or more other elements or combinations thereof.

[0029] It should be noted that in the description of the present invention, the orientation or position relationship indicated by the terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In the description of the present invention, unless otherwise clearly specified and limited, the term "provided with" should be understood in a broad sense. For ordinary technicians in this field, they can understand the specific meaning of the above terms in the present invention according to specific circumstances.

[0031] Example 1

[0032] A combustion chamber upper cover forming tool, its structure is as follows Figure 1 - Figure 2 As shown, it includes: a punch 1, a punch connecting plate 2 for fixing the punch 1 to the power output end of the hydraulic press, a die 3, and a die connecting plate 4 for fixing the die 3 to the work surface, and the die 3 and the punch 1 are provided with an annular groove 31 and an annular boss 11 adapted to the combustion chamber cover 9;

[0033] The outer diameter of the annular groove 31 is smaller than the outer diameter of the blank material, and the inner diameter of the annular groove 31 is larger than the inner diameter of the blank material;

[0034] The fitting clearance between the punch 1 and the die 3 is the thickness of the blank material;

[0035] At least two positioning pins I 32 are provided in the annular groove 31;

[0036] The bottom of the annular boss 11 is provided with an avoidance hole 12 adapted to the positioning pin I 32;

[0037] The diameter and position of the positioning pin I 32 are adapted to the mounting hole 91 of the combustion chamber upper cover 9;

[0038] A material ejecting mechanism 5 is provided in the annular groove 31 .

[0039] In actual application, one end of the positioning pin Ⅰ32 is fixed in the positioning hole Ⅰ33 of the annular groove 31; this tooling is provided by a 7-ton hydraulic press to extrude the material through the tooling to cause it to undergo plastic deformation and reach the specified size. The outer dimensions of the workpiece are processed on the die 3, and the inner cavity dimensions of the workpiece are processed on the punch 1. Through the cooperation between the punch 1 and the die 3 of the tooling, the middle gap is the thickness of the blank material, which is extruded and folded, and the outer circle and the inner hole are formed at one time. This will reduce one set of tooling and one clamping, so the efficiency is more than doubled. The ejection mechanism 5 is configured as four to ensure that the workpiece is separated from the die 3 at all places; the blank material is 0.5mm thick 304DQ material with good tensile ductility; three φ3.5 mounting holes 91 of the workpiece have been cut out during laser blanking, such as Figure 4 The size of the positioning pin Ⅰ 32 is set to D3.4X45, so as to use the mounting hole 91 for positioning and solve the positioning problem.

[0040] Working principle: During operation, the blank material cut by laser is placed on the die 3, and the positioning pins I32 are all inserted into the mounting holes 91, and then the punch 1 is driven downward to perform the folding work of the combustion chamber upper cover 9 part.

[0041] By setting the annular groove 31 and the annular boss 11, the combustion chamber upper cover 9 can complete the folding forming of the inner hole and the outer circle through one-time processing, thereby reducing the folding process of the combustion chamber upper cover 9 part preparation, and by setting the positioning pin to use the mounting hole 91 set on the combustion chamber upper cover 9 for positioning, the high precision of the part processing process is ensured and the stability of the processing quality is improved; by setting the ejecting mechanism 5, the formed workpiece can be smoothly ejected from the tooling to achieve rapid material removal, improve work efficiency, and facilitate the separation of the formed workpiece from the die 3.

[0042] Example 2

[0043] This embodiment 2 is a preferred embodiment of the present invention, and its specific structure is as follows Figure 1 - Figure 2As shown, the following improvements are disclosed based on Example 1: the ejecting mechanism 5 includes: an ejecting rod 51 and an elastic member 52 sleeved on the ejecting rod 51 to push the ejecting rod 51 to move toward one side of the annular groove 31;

[0044] The die 3 is provided with a stepped hole extending through it, and the area of ​​the stepped hole on one side close to the annular groove 31 is smaller than that on the other side;

[0045] The ejecting rod 51 is provided with a convex edge 511 adapted to the step of the step hole to limit the lifting distance of the ejecting rod 51.

[0046] In actual application, the elastic member 52 is configured as a rectangular spring RSSWHD22-L30, which is a heavy-duty spring with an outer diameter of φ22 and a length of 30 mm. One spring can generate a force of 1421 N. This tooling uses four rectangular springs, which are fully capable of separating the workpiece from the die 3. The highest point of the locating pin Ⅰ32 is higher than the highest movable point of the ejector rod 51 by at least the thickness of a workpiece blank.

[0047] Working principle: By setting up the ejection mechanism 5, when the workpiece is squeezed into the die 3, the rectangular spring under the ejection rod 51 is compressed at the same time, and the ejection rod 51 is retracted, which will not affect the effect of the workpiece being squeezed; when the punch 1 moves upward, the rectangular spring drives the ejection rod 51 to move upward, pushing the workpiece out of the die 3.

[0048] Example 3

[0049] This embodiment 3 is a preferred embodiment of the present invention, and its specific structure is as follows: Figure 3 As shown, the following improvement is disclosed based on Example 1: the side surface of the annular boss 11 is configured with a taper 15 for facilitating stripping.

[0050] In actual application, the inner ring side surface of the annular boss 11 is provided with an inclined bevel to adapt to the inner hole folding shape required by the workpiece, and at the same time, the side surface of the upper end of the bevel is provided with a 1° taper 15 to prevent the inner side of the workpiece from being stuck on the punch 1; the taper 15 of the outer ring side surface of the annular boss 11 is 1° to prevent the workpiece from being stuck on the punch 1.

[0051] Working principle: After the workpiece is formed inside the tooling, it is affected by the material tension and holds the tooling tightly. Therefore, the product formed by extrusion is extremely difficult to remove, resulting in extremely low processing efficiency. The taper 15 on the side of the annular boss 11 can prevent the workpiece from being stuck on the punch 1.

[0052] Example 4

[0053] This embodiment 4 is a preferred embodiment of the present invention, and its specific structure is as follows: Figure 1 - Figure 3As shown, the following improvements are disclosed based on Example 1: the punch 1 and the punch connecting plate 2 are both provided with corresponding positioning holes II 13;

[0054] A positioning pin II 7 is passed through the positioning hole II 13 , and the positioning hole II 13 is communicated with the avoidance hole 12 .

[0055] The die 3 and the die connecting plate 4 are both provided with corresponding positioning holes III 34;

[0056] A positioning pin III 8 is passed through the positioning hole III 34 .

[0057] In actual application, the punch 1 and the die 3 are respectively fixed to the punch connecting plate 2 and the die connecting plate 4 by M8X22 hexagon socket bolts 6; the size of the locating pin II 7 is D8x35, and the punch 1 is provided with a locating boss 14 adapted to the punch connecting plate 2 for positioning; the locating pin III 8 is configured in two, and their sizes are D16x35 and D8x35 respectively.

[0058] Working principle: The setting of positioning pin II7 and positioning pin III8 enables the position and angle of punch 1 and die 3 to be accurately positioned during installation, ensuring that the annular groove 31 and the annular boss 11 correspond to each other while making the positioning pin I32 and the avoidance hole 12 correspond to each other, ensuring the normal operation of the tooling.

[0059] The above solutions are only examples of preferred embodiments, but are not limited thereto. When implementing the present invention, appropriate replacements and / or modifications can be made according to user needs.

[0060] The number of devices and processing scales described herein are used to simplify the description of the present invention. Applications, modifications and variations of the present invention will be apparent to those skilled in the art.

[0061] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and examples. They can be applied to a variety of fields suitable for the present invention. Further modifications will be readily apparent to those skilled in the art. Therefore, the present invention is not limited to the specific details and illustrations shown and described herein without departing from the general concept defined by the claims and their equivalents.

Claims

1. A combustion chamber upper cover forming tool, comprising: A punch, a punch connecting plate fixing the punch to the power output end of the hydraulic press, a die, and a die connecting plate fixing the die to the work surface, wherein the die and punch are provided with an annular groove and an annular boss adapted to the combustion chamber cover; The outer diameter of the annular groove is smaller than the outer ring diameter of the blank material, and the inner diameter of the annular groove is larger than the inner ring diameter of the blank material; The fitting clearance between the punch and the die is the thickness of the blank material; At least two positioning pins I are provided in the annular groove; The bottom of the annular boss is provided with an avoidance hole adapted to the positioning pin I; The diameter and position of the positioning pin I are adapted to the mounting hole of the combustion chamber upper cover; A material ejecting mechanism is provided in the annular groove.

2. The combustion chamber upper cover forming tool according to claim 1, characterized in that: The ejecting mechanism includes: an ejecting rod and an elastic member sleeved on the ejecting rod to push the ejecting rod to move toward one side of the annular groove; The die is provided with a stepped hole extending through the die, and the area of ​​the stepped hole on one side close to the annular groove is smaller than the area of ​​the hole on the other side; The ejector rod is provided with a convex edge which is matched with the step of the step hole to limit the lifting distance of the ejector rod.

3. The combustion chamber upper cover forming tool according to claim 1, characterized in that: The side surface of the annular boss is configured to have a taper for facilitating stripping.

4. The combustion chamber upper cover forming tool according to claim 1, characterized in that: The punch and the punch connecting plate are both provided with corresponding positioning holes II; A positioning pin II is passed through the positioning hole II, and the positioning hole II is communicated with the avoidance hole.

5. The combustion chamber upper cover forming tool according to claim 1, characterized in that: The die and the die connecting plate are both provided with corresponding positioning holes III; A positioning pin III is passed through the positioning hole III.

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