Stamping die of numerical control lathe

Abstract

The utility model belongs to the technical field of machining, and particularly relates to a numerical control lathe stamping die which comprises a base arranged on a numerical control lathe, and a driving unit is correspondingly arranged above the base. The lower die is used for placing a workpiece; the upper die and the lower die are correspondingly formed, and the upper die can move relatively in the direction of the lower die so as to carry out secondary pressing on the workpiece, and a formed workpiece with an upper wall, a side wall and a flange is formed; wherein the upper die moves towards the direction of the lower die by a first distance and presses the upper wall and the side wall of the formed workpiece while applying primary pressure, then the upper die can be matched with the lower die to form a middle die, the middle die comprises a variable punch, and the variable punch is elastically supported by an elastic piece; compared with the prior art, the flange pressing device has the advantages that the production cost is effectively reduced, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical processing technology, and in particular relates to a CNC lathe stamping die. Background Technology

[0002] Punch press dies are an important component of CNC punching equipment. Punch press dies are usually composed of an upper die and a lower die. For example, an automated punch press die disclosed in patent application number CN202322597135.8 includes a base, an upper die, and a lower die. Support plates are bolted to both sides of the top of the base. A top plate is bolted to the top of the support plates. Cylinders are bolted to both sides of the bottom of the top plate. The piston rod of the cylinder is bolted to a first housing. A first sliding groove is opened on the opposite side of the support plate.

[0003] When using existing punching dies, complex workpieces are usually processed in several punching operations, resulting in high costs and low efficiency due to the multi-process forming. Therefore, it is necessary to make improvements. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned technical problems by providing a CNC lathe stamping die, which can effectively reduce production costs and improve work efficiency.

[0005] In view of this, the present invention provides a CNC lathe stamping die, comprising:

[0006] A base is mounted on a CNC lathe, and a drive unit is correspondingly mounted on the top of the base;

[0007] Also includes:

[0008] A lower mold, used to place the workpiece;

[0009] The upper mold is formed corresponding to the lower mold and can move relative to the lower mold in the direction of the lower mold to perform secondary pressing on the workpiece, forming a molded workpiece with an upper wall, side walls and flanges.

[0010] In this process, while the upper mold moves a first distance toward the lower mold and applies pressure, it presses the upper wall and side wall of the workpiece. Then, the upper mold can cooperate with the lower mold to form an intermediate mold. The intermediate mold includes a variable punch, which is elastically supported by an elastic element, so that the flange can be pressed while moving a second distance along the direction of the lower mold and receiving secondary pressure.

[0011] In this technical solution, the workpiece is pressed and formed by the cooperation of the upper and lower dies during the stamping process. The upper die can cooperate with the lower die to perform single-stroke multi-stage forming of the workpiece, thereby effectively simplifying the production process, reducing production costs, and improving work efficiency.

[0012] In the above technical solution, the lower mold further includes:

[0013] The lower mold body has a receiving groove formed therein;

[0014] The variable punch is mounted to be able to rise and fall based on a receiving groove, so that it can be received in the receiving groove and descend to a second height during secondary pressure pressing. During primary pressure pressing, the first height raised from the receiving groove is maintained by utilizing the elastic restoring force of the elastic element. Furthermore, during secondary pressure pressing, the elastic restoring force of the elastic element is maintained by the pressing pressure of the upper die. In the above technical solution, further...

[0015] In the above technical solution, the variable punch further includes:

[0016] The upper part has a surface for placing the workpiece, and the upper part is formed into an upper wall corresponding to the formed workpiece;

[0017] Side portion, which is formed as a side wall corresponding to the molded workpiece;

[0018] The lower part is formed to be at least partially received in a receiving groove and the elastic element is mounted at the lower part.

[0019] In the above technical solution, the upper mold further includes:

[0020] The upper die body has a forming groove formed on it, which corresponds to the shape of the variable punch.

[0021] Upper mold pad, which is installed in the forming groove and is formed to correspond to the upper wall of the forming workpiece;

[0022] The upper mold pad is equipped with a first bending pressure adjustment device, which allows the height of the lower surface of the upper mold pad to be adjusted.

[0023] Furthermore, the above technical solution also includes:

[0024] A keyway formed on the upper surface to allow the workpiece to be excessively bent.

[0025] Circular stacked protrusions are formed near the entrance of the receiving groove to cause excessive bending of the workpiece.

[0026] Furthermore, the above technical solution also includes:

[0027] An edge cutting section is provided on both sides of the lower mold body. The edge cutting section can move up and down and can enter and exit the lower mold body. It also has a cutter protruding from the outer surface of the upper end.

[0028] A shearing seat is installed on at least two sides of the upper mold and is capable of moving up and down to shear the two ends of the workpiece.

[0029] The beneficial effects of this utility model are:

[0030] 1. By using the upper and lower dies in conjunction, the workpiece is formed in a single stroke and multiple stages, which effectively simplifies the production process, reduces production costs, and improves work efficiency;

[0031] 2. By using keyways and circular stacked protrusions, permanent compression deformation can be induced during the workpiece pressing process, thereby suppressing springback of the formed workpiece and reducing the problem of severe springback in the formed workpiece;

[0032] 3. The edge trimming section and shearing seat enable simultaneous trimming of the workpiece edge during the pressing process, further simplifying the production process, reducing production costs, and improving work efficiency. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of a specific embodiment of the present utility model.

[0035] Figure 2 This is a schematic diagram of the structure of this utility model under a single pressing state.

[0036] Figure 3 This is a schematic diagram of the structure of this utility model under secondary pressing conditions.

[0037] Figure 4 This is a schematic diagram of the structure of the molded workpiece of this utility model.

[0038] Figure 5 This is a schematic diagram of the edge cutting section structure under the secondary pressing state of this utility model.

[0039] Figure 6This is a schematic diagram of the edge cutting section of this utility model in the completed cutting state.

[0040] The markings in the diagram are as follows:

[0041] 1. Base; 2. Lower mold; 20. Main body of lower mold; 21. Receiving groove; 3. Upper mold; 30. Main body of upper mold; 31. Forming groove; 32. Upper mold pad; 4. Formed workpiece; 40. Upper wall; 41. Side wall; 42. Flange; 5. Intermediate mold; 6. Variable punch; 60. Upper part; 61. Side part; 62. Lower part; 7. Elastic element; 8. Keyway; 9. Circular stacked protrusion; 10. Edge cutting part; 100. Cutting knife; 101. Fixed body; 102. Moving body; 103. Elastic unit; 11. Shearing seat; 12. Engaging protrusion; 13. Corner. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0043] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0044] First, such as Figure 1 , 2 As shown in Figure 3, a CNC lathe stamping die according to some embodiments of the present invention includes a lower die 2 mounted on a common stamping CNC lathe base 1, and an upper die 3 formed to correspond to the lower die 2 and movable relative to the lower die 2 in the direction thereof, such that the workpiece can be pressed by extruding the workpiece by a drive unit.

[0045] Here, the workpiece can be inserted between the lower mold 2 and the upper mold 3 when the mold opens, and the lower mold 2 and the upper mold 3 are engaged with each other when the mold closes, so that the workpiece can be pressed and shaped.

[0046] However, the lower mold 2 and the upper mold 3 are not limited to the upper and lower mold 2. They can be used in various forms, such as changing the position between the lower mold 2 and the upper mold 3, or changing the mold direction between the left mold and the right mold. All molds can be used.

[0047] When describing the forming process of CNC lathe stamping dies according to some embodiments of the present invention, such as Figure 2 and Figure 3 As shown, ultra-high strength steel or hot stamping is used between the lower mold 2 and the upper mold 3. When the blank or workpiece made of steel or other materials is put in, the upper mold 3 is first moved a first distance in the direction of the lower mold 2. During one pressing, the upper wall 40 and the side wall 41 of the workpiece are first formed. Then the upper mold 3 can cooperate with the lower mold 2 to form an intermediate mold 5. The intermediate mold 5 includes a variable punch 6. Then, the upper mold 3 is formed into the lower mold 2. While moving a second distance in this direction and being subjected to secondary pressure, the flange 42 of the workpiece can be pressed.

[0048] Some embodiments of the present invention involve CNC lathe stamping dies that can perform press forming to prevent springback by excessively bending the upper wall 40, side wall 41 and flange 42.

[0049] More specifically, the lower die 2 of a CNC lathe stamping die according to some embodiments of the present invention has a receiving groove 21. Figure 2 In the forming lower die body 20 and the first pressing process, the variable punch 6 is held at a first height raised from the receiving groove 21 by the elastic restoring force of the elastic element 7. During the pressing process, the elastic restoring force of the elastic element 7 is overcome by the pressing pressure of the upper die 3, and with the receiving groove 21 as a reference, it can be housed in the receiving groove 21 and lowered to a second height.

[0050] Here, the variable punch 6 can be formed at a height of 150% to 200% or more than the depth of the workpiece to be pressed. For example, when the depth of the workpiece 4 is 60 mm, the height of the variable punch 6 can be set to 90 mm to 120 mm.

[0051] For example, such as Figure 1 As shown, the variable punch 6 has a surface for placing the workpiece, and has an upper part 60 formed in a manner corresponding to the upper wall 40 of the formed workpiece 4, a side part 61 formed in a manner corresponding to the side wall 41 of the formed workpiece 4, and a lower part 62 formed in a manner in which at least a portion is received in the receiving groove 21 and an elastic member 7 is installed.

[0052] Additionally, for example, such as Figure 2 As shown, the upper part 60 of the variable punch 6 engages with the upper die pad 32 of the upper die 3, causing the workpiece to bend excessively. A keyway 8 may be formed on the surface of the variable punch 6 where the workpiece is placed and has a first depth and a first width.

[0053] Therefore, as Figure 3 As shown, it is possible to over-bend (over-form) the formed workpiece 4, the upper wall 40, the side wall 41, and the inner curved portion between them.

[0054] Additionally, for example, such as Figure 1 As shown, the bottom of the upper mold 3 also has a locking protrusion 12, which engages with the locking protrusion 12 of the lower mold 2 and the upper mold 3, enabling the workpiece to bend excessively. It can also form a circular stacked protrusion 9 with an integral circular protrusion shape near the inlet of the receiving groove 21.

[0055] Therefore, the sidewalls 41 and flanges 42 of the formed workpiece 4 use the engagement of the engaging protrusions 12 and the circular stacked protrusions 9 to prevent springback, and the curvature between them can be excessive.

[0056] Meanwhile, for example, the upper part 60 of the variable punch 6 engages with the upper die pad 32 of the upper die 3, and is provided with a corner 13 on the edge of the surface of the variable punch 6 where the workpiece is placed, so that it can be over-bent, and the corner 13 is preferably formed into a round (rounded corner).

[0057] Therefore, as Figure 3 As shown, in addition to the engagement of the upper mold pad 32 and the keyway 8, the engagement of the upper mold pad 32 and the corner portion 13 can further prevent springback, and the upper wall 40, the side wall 41 and the outer curvature portion between them can be excessively bent.

[0058] Therefore, as described above, by first excessively bending the inner and outer curved portions, springback of the upper wall 40 and side wall 41 can be prevented. In addition, by engaging the engaging protrusion 12 with the circular stacked protrusion 9, the side wall 41 and flange 42 of the molded workpiece 4 can be formed. Springback can be fundamentally prevented by the secondary excessive bending and the curvature between them.

[0059] Therefore, when the lower mold 2 and the upper mold 3 are open, a workpiece can be placed between them. Then, when the molds are closed, the upper mold 3 moves to a first distance and inserts a portion of the variable punch 6 of the lower mold 2 into the forming groove 31 of the upper mold 3 to form the upper wall 40 and side wall 41 of the workpiece 4. Then, the upper mold body 30, the upper mold pad 32 and the variable punch 6 form the intermediate mold 5. The intermediate mold 5 continues to move to a second distance in the direction of the lower mold 2 so that the flange 42 of the workpiece 4 can be pressed and formed.

[0060] Therefore, according to some embodiments of the present invention, the CNC lathe stamping die presses the workpiece 4 by using only a single forming process in one stroke, which effectively simplifies the production process, reduces production costs, and improves work efficiency.

[0061] Simultaneously, by utilizing the gradient or anti-gradient engagement between the aforementioned upper mold pad 32, keyway 8, corner portion 13, engaging protrusion 12, and circular stacked protrusion 9, an over-bending operation is performed. By inducing permanent compressive deformation of the bent portion, dimensional deformation due to springback in the final molded product can be prevented. More specifically, for example, the final pressed product can be pressed by compressing the thickness of the bent portion to 3% to 7% to prevent dimensional deformation due to springback.

[0062] More specifically, additional pressure is applied to the left and right gaps between the corner 13 and the upper die pad 32, and the top and bottom gaps between the corner 13 and the upper die body 30, to thin the workpiece to within 3% to 7% of its thickness. The keyway 8 has a depth of 6 to 7 times the workpiece thickness to induce permanent deformation, and the gap between the upper die pad 32 and the upper die body 30 is equal to the workpiece thickness. The rear angle of the variable punch 6 is 0 to 5 degrees, the protrusion length of the engaging protrusion 12 is 4 to 5 times the workpiece thickness, and the gap between the circular stacked protrusion 9 and the upper die body 30 is 2 to 3 times the workpiece thickness. The gap between the lower die body 20 and the upper die body 30 is 4 to 6 times the workpiece thickness. The width of the circular stacked protrusion 9 is 15 mm to 20 mm. The gap between the variable punch 6 and the lower die body 20 can be -10% to +10% of the radius of curvature of the formed workpiece 4.

[0063] In other embodiments of the present invention, the upper mold pad 32 applies pressing pressure in a manner that allows the height of the lower surface to be adjusted by a first bending pressure adjusting device, specifically comprising one or more of an adjusting block, a pressing pressure adjusting screw, a pressing pressure adjusting elastic element 7, and combinations thereof.

[0064] Therefore, the height of the lower surface of the upper die pad 32 can be adjusted by adjusting or replacing the number of adjusting blocks, adjusting the pressing pressure adjusting screw, or replacing various pressing pressure adjusting elastic elements 7. By simply and precisely adjusting the clamping force of the upper die pad 32 over bending, such as raising or lowering it, optimization can be achieved according to workpiece specifications, material, molding environment, molding equipment, etc.

[0065] Preferably, the variable punch 6, the circular stacked protrusions 9, and other positions may also have bending pressure adjustment devices.

[0066] like Figure 5 and Figure 6As shown, the edge-cutting portion 10 is provided on at least two sides of the lower mold body portion 20, allowing it to move vertically and vertically, and is also capable of entering and exiting within the lower mold body portion 20. A cutter 100 is provided on the outer surface of its upper end. The edge-cutting portion 10 includes a fixed body 101, a movable body 102, and an elastic unit 103. The fixed body 101 is installed on at least two sides of the lower mold body portion 20, and its upper end has an upwardly inclined surface that slopes upward toward the outer side of the lower mold body portion 20. The movable body 102 is disposed on the upper part 60 of the fixed body 101, and has a downwardly inclined surface at its lower end corresponding to the upwardly inclined surface. The cutter 100 protrudes from the outer surface of the upper part 60. The movable body 102 is configured to slide along the upwardly inclined surface on the downwardly inclined surface while entering and exiting within the lower mold body portion 20. The two ends of the elastic unit 103 are fixedly attached to one side of the outer surface of the lower mold body 20 and one side of the inner surface of the corresponding movable body 102, and apply an elastic force to the movable body 102 in the outward direction of the lower mold body 20.

[0067] The shearing seat 11 is formed on the upper mold 3 and is movablely engaged with the upper mold 3. After the upper mold 3 and the lower mold 2 complete the mold closing and pressing, the shearing seat 11 can continue to move relative to the upper mold 3 under the action of the driving unit and cooperate with the cutter 100 to cut off the edge of the formed workpiece 4, thereby facilitating the removal of edge burrs of the formed workpiece 4, further simplifying the production process, reducing production costs, and improving work efficiency.

[0068] The invention has been described with reference to embodiments shown in the accompanying drawings; however, these are merely exemplary, and those skilled in the art will understand that various modifications and equivalent embodiments are possible. Therefore, the true scope of protection of the invention should be determined by the spirit of the appended claims.

[0069] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A CNC lathe stamping die, comprising: A base (1) is mounted on a CNC lathe, and a drive unit is correspondingly mounted above the base (1). Its characteristic is that it further includes: Lower mold (2), the lower mold (2) is used to place the workpiece; The upper mold (3) is formed in relation to the lower mold (2) and can move relative to the lower mold (2) to perform secondary pressing on the workpiece, forming a molded workpiece (4) with an upper wall (40), a side wall (41) and a flange (42); While the upper mold (3) moves a first distance toward the lower mold (2) and applies pressure, it presses the upper wall (40) and side wall (41) of the formed workpiece (4). Then, the upper mold (3) can cooperate with the lower mold (2) to form an intermediate mold (5). The intermediate mold (5) includes a variable punch (6), which is elastically supported by an elastic element (7) so that the flange (42) can be pressed while moving a second distance along the direction of the lower mold (2) and receiving secondary pressure.

2. The CNC lathe stamping die according to claim 1, characterized in that, The lower mold (2) also includes: The lower mold body (20) has a receiving groove (21) formed therein; The variable punch (6) is mounted to be able to rise and fall based on the receiving groove (21) so that it can be received in the receiving groove (21) and fall to a second height in the secondary pressure pressing, and in the primary pressure pressing, the first height raised from the receiving groove (21) is maintained by utilizing the elastic restoring force of the elastic member (7), and in the secondary pressure pressing, the elastic restoring force of the elastic member (7) is maintained by the pressing pressure of the upper die (3).

3. A CNC lathe stamping die according to claim 2, characterized in that, The variable punch (6) also includes: The upper part (60) has a surface for placing the workpiece, and the upper part (60) is formed into an upper wall (40) corresponding to the formed workpiece (4); Side portion (61), said side portion (61) is formed as a sidewall (41) corresponding to the molded workpiece (4); The lower part (62) is formed to be at least partially received in the receiving groove (21) and the elastic member (7) is installed at the lower part (62).

4. A CNC lathe stamping die according to claim 3, characterized in that, The upper mold (3) also includes: The upper die body (30) has a forming groove (31) formed on it in a shape corresponding to the variable punch (6); Upper mold pad (32) is installed in the forming groove (31) and is formed to correspond to the upper wall (40) of the forming workpiece (4).

5. A CNC lathe stamping die according to claim 4, characterized in that, Also includes: Keyway (8), the keyway (8) is formed on the surface of the upper part (60) for causing excessive bending of the workpiece; Circular stacked protrusions (9) are formed near the entrance of the receiving groove (21) to cause excessive bending of the workpiece.

6. A CNC lathe stamping die according to claim 2, characterized in that, Also includes: Edge cutting section (10) is provided on both sides of the lower mold body part (20). The edge cutting section (10) can move up and down and can enter and exit the lower mold body part (20). It also has a cutter (100) protruding from the outer surface of the upper end.

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