Inner hole step surface stamping device

Abstract

The utility model relates to the technical field of stamping processing equipment, in particular to an inner hole step surface stamping device. The stamping device is used for stamping and forming cup-shaped and barrel-shaped workpieces, and the workpieces are stamped and formed into step surfaces. The device comprises a stamping platform, a cover die, a stamping die, a discharging sleeve and a demolding ejector rod. In the working process of the device, the stamping die is driven to instantly descend towards the forming inner cavity of the cover die and enter the forming inner cavity; a punch of the stamping die firstly makes contact with a workpiece, then the portion, close to the punch, of the fixing rod makes contact with the workpiece, after the stamping die makes contact with the workpiece completely, the horizontal plane, with the cross section diameter larger than that of the punch, of the fixing rod conducts extrusion forming on the inner wall of the workpiece, and therefore a first inner hole step face is formed; after punching is completed, the punching die is driven to reset. According to the structure, the existing machining technology is improved, the technical defects of deformation, size errors, roughness and the like of product machining are overcome through the simple structure, and the production efficiency is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of die stamping processing, and particularly relates to an inner hole stepped surface stamping device. Background Art

[0002] Combined Figure 7 , it is a cup-shaped and cylindrical workpiece. It has a cylindrical cup structure and has a first inner hole stepped surface a1, an outer wall stepped surface a2, and a second inner hole stepped surface a3 from top to bottom. The existing products of this kind are machined products, which increases more costs, has a relatively low efficiency, and is not very suitable for mass production considering re-clamping.

[0003] If large-scale production is to be carried out and the annual market demand of millions of pieces is to be met, a die that can produce in batches must be developed. Therefore, this die structure has been developed, which not only meets the needs of customers but also greatly saves costs. Content of the Utility Model

[0004] The utility model provides an inner hole stepped surface stamping device for stamping and forming the inner hole of a workpiece, including,

[0005] A stamping platform, fixedly arranged;

[0006] A sleeve die, detachably arranged on the stamping platform, and provided with a forming inner cavity;

[0007] A stamping die, driven to move up and down, arranged above the sleeve die and coaxially distributed with the sleeve die,

[0008] The stamping die includes a fixed rod and a punch. The punch is connected to the lower end of the fixed rod and coaxially distributed. In one horizontal plane, the cross-sectional diameter of the fixed rod is greater than the cross-sectional diameter of the punch;

[0009] By driving the stamping die, the punch and the part of the fixed rod close to the punch can approach or move away from the forming inner cavity of the sleeve die.

[0010] The utility model provides a stamping device for stamping and forming cup-shaped and cylindrical workpieces. This device can form an inner hole stepped surface on the inner wall of the workpiece. During the working process of this device, by driving the stamping die to instantaneously descend towards the forming inner cavity of the sleeve die and enter the forming inner cavity; the punch of the stamping die first contacts the workpiece, and then the part of the fixed rod close to the punch contacts the workpiece. After the stamping die completely contacts the workpiece, the horizontal plane where the cross-sectional diameter of the fixed rod is greater than the cross-sectional diameter of the punch extrudes the inner wall of the workpiece to form an inner hole stepped surface; after stamping is completed, the stamping die is driven to reset. This structure improves the existing processing technology and solves technical defects such as deformation, dimensional error, and roughness of the machined product with a simple structure, greatly improving the production efficiency.

[0011] In some embodiments, the fixed rod includes a connecting portion and a mounting portion. The connecting portion is drivingly connected to the outside, the mounting portion is provided at the lower end of the connecting portion, and a mounting groove is provided on the lower end surface of the mounting portion. The punch is nested in the mounting groove.

[0012] Thus, the fixed rod is composed of a connecting portion and a mounting portion. The connecting portion is used for driving connection to receive an input force, and the mounting portion is used for mounting the punch. The punch is installed by embedding and nesting, which can ensure the coaxiality of the punch. Moreover, through the above-mentioned detachable punch, only the punch needs to be replaced after more uses and wear occurs.

[0013] In some embodiments, the punch includes an inlay portion and a first stamping portion. The inlay portion is provided at the upper end of the first stamping portion, and the inlay portion is nested in the mounting groove;

[0014] In the contact plane between the mounting portion and the first stamping portion, the cross-sectional diameter of the fixed rod is greater than the cross-sectional diameter of the punch.

[0015] Thus, the inlay portion is used for nesting into the mounting groove of the mounting portion for inlay installation, and the horizontal plane where the cross-sectional diameter of the fixed rod is greater than the cross-sectional diameter of the punch is the contact plane between the mounting portion and the first stamping portion.

[0016] In some embodiments, the die sleeve includes a fixed sleeve, a contact sleeve, and a support bottom plate. The contact sleeve is connected to the lower end of the fixed sleeve, and the support bottom plate is provided at the lower end of the contact sleeve;

[0017] In one horizontal plane, the inner hole diameter of the fixed sleeve is greater than the inner hole diameter of the contact sleeve.

[0018] Thus, the die sleeve is composed of a fixed sleeve, a contact sleeve, and a support bottom plate. After the fixed sleeve, the contact sleeve, and the support bottom plate are installed, they are all fixedly arranged. A forming inner cavity is formed in the fixed sleeve, the contact sleeve, and the support bottom. The workpiece is extruded by the stamping die and cooperates with the forming inner cavity to form a stepped surface on the outer wall of the workpiece.

[0019] In some embodiments, the punch further includes a second stamping portion, and the second stamping portion is provided at the lower end of the first stamping portion;

[0020] The cross-sectional diameter of the first stamping portion is greater than the cross-sectional diameter of the second stamping portion.

[0021] Thus, through the relationship between the second stamping portion and the first stamping portion, a second inner hole stepped surface can be formed on the inner hole of the workpiece.

[0022] In some embodiments, an inner hole stepped surface stamping device further includes a stripping sleeve. The stripping sleeve is sleeved outside the fixed rod, the stripping sleeve can slide forward and backward along the axis of the fixed rod, and a return spring is provided between the stripping sleeve and the fixed rod.

[0023] Thus, during stamping, the end face of the stripper sleeve contacts the sleeve die, the return spring is compressed, and relative displacement occurs between the stripper sleeve and the stamping die; after stamping is completed, the stamping die returns, and relative displacement occurs between the stripper sleeve and the stamping die, causing the workpiece sleeved outside the stamping die to fall off.

[0024] In some embodiments, a first stepped portion is provided at the upper end of the fixing rod, a second stepped portion is provided at the lower end of the fixing rod, a limiting groove is formed between the first stepped portion and the second stepped portion, a limiting ring is provided on the inner wall of the stripper sleeve, and the limiting ring is slidably embedded in the limiting groove. The return spring acts between the first stepped portion and the limiting ring.

[0025] Thus, by setting the above structure, the stripper sleeve is installed.

[0026] In some embodiments, an inner hole stepped surface stamping device further includes a demolding ejector rod. The demolding ejector rod is driven to be provided, and the demolding ejector rod is slidably nested in the sleeve die. The demolding ejector rod is provided with a vent hole, and the vent hole communicates the forming inner cavity with the outside.

[0027] Thus, the demolding ejector rod can eject the workpiece from the forming inner cavity.

[0028] In some embodiments, a through hole is provided at the bottom of the sleeve die. The demolding ejector rod includes a load-bearing portion and a limiting rod. The load-bearing portion is nested in the sleeve die, and the limiting rod is provided at the lower end of the load-bearing portion. The limiting rod penetrates through the through hole.

[0029] Thus, by driving the limiting rod to make the load-bearing portion perform a piston movement, the workpiece can be ejected from the forming inner cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 FIG. is a three-dimensional structural schematic diagram of an inner hole stepped surface stamping device provided by an embodiment of the present invention.

[0032] Figure 2 For Figure 1 FIG. shows a three-dimensional structural schematic diagram of another state of an inner hole stepped surface stamping device.

[0033] Figure 3 For Figure 1 FIG. shows a sectional structural schematic diagram of a state of an inner hole stepped surface stamping device.

[0034] Figure 4 ForFigure 1 Schematic cross-sectional structure diagram of another state of an inner hole stepped surface stamping device as shown

[0035] Figure 5 For Figure 1 Exploded structure diagram of a part of the structure in an inner hole stepped surface stamping device as shown

[0036] Figure 6 For Figure 1 Exploded structure diagram of the stamping die in an inner hole stepped surface stamping device as shown

[0037] Figure 7 For Figure 1 Schematic three-dimensional structure diagram of the workpiece in an inner hole stepped surface stamping device as shown

[0038] Reference numerals in the figure: 100 - stamping platform, 200 - sleeve die, 210 - fixed sleeve, 220 - abutting sleeve, 230 - supporting bottom plate, 240 - through hole, 300 - stamping die, 310 - fixed rod, 311 - connecting part, 3111 - first step part, 3112 - second step part, 3113 - limiting groove, 312 - mounting part, 3121 - mounting groove, 320 - punch, 321 - inlaid part, 322 - first stamping part, 323 - second stamping part, 400 - unloading sleeve, 410 - limiting ring, 500 - demolding ejector rod, 501 - vent hole, 510 - bearing part, 520 - limiting rod, a - workpiece, a1 - first inner hole stepped surface, a2 - outer wall stepped surface, a3 - second inner hole stepped surface. Detailed implementation manners

[0039] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0040] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0041] The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0042] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be welding, bolt connection, or riveting; it can be fixed connection, detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] The invention discloses an inner hole step surface punching device for solving the technical problems of deformation, dimensional error, roughness and the like in the prior art of machining of the product.

[0044] Combination Figure 1-7 , a punching device for inner hole step surface, used for punching and forming the inner hole of workpiece a; it is actually a punching device for punching and forming cup-shaped and cylindrical workpiece a, and this device can form an inner hole step surface at the inner wall of workpiece a. This punching device includes a punching platform 100, a sleeve die 200, a punching die 300, a discharge sleeve 400, and a demoulding ejector 500. The punching platform 100 is fixedly arranged; the sleeve die 200 is detachably arranged on the punching platform 100, and the sleeve die 200 is provided with a forming inner cavity; the punching die 300 is driven to rise and fall, and the punching die 300 is arranged above the sleeve die 200 and is coaxially distributed with the sleeve die 200; the discharge sleeve 400 is sleeved on the outside of the fixed rod 310, and the discharge sleeve 400 can be slidably arranged along the axis of the fixed rod 310; the demoulding ejector 500 is driven to be arranged, and the demoulding ejector 500 can be slidably nested in the sleeve die 200. The sleeve die 200, the punching die 300, the unloading sleeve 400, and the demoulding ejector rod 500 are all coaxially distributed.

[0045] Combination Figures 3-6 The punching die 300 includes a fixed rod 310 and a punch 320. The punch 320 is connected to the lower end of the fixed rod 310 and is coaxially distributed. In one horizontal plane, the cross-sectional diameter of the fixed rod 310 is larger than the cross-sectional diameter of the punch 320. The horizontal plane where the cross-sectional diameter of the fixed rod 310 is larger than the cross-sectional diameter of the punch 320 forms a punching portion for forming the stepped surface of the inner hole of the workpiece a. By driving the punching die 300, the punch 320 and the part of the fixed rod 310 close to the punch 320 can approach or move away from the forming inner cavity of the sleeve die 200.

[0046] During the operation of the device, the stamping die 300 instantaneously descends into the forming cavity of the sleeve die 200 and enters the forming cavity. The punch 320 of the stamping die 300 first contacts the workpiece a, and then the part of the fixing rod 310 close to the punch 320 contacts the workpiece a. After the stamping die 300 is fully in contact with the workpiece a, the horizontal plane where the cross-sectional diameter of the fixing rod 310 is larger than that of the punch 320 extrudes the inner wall of the workpiece a to form the first inner hole step surface a1, as Figure 7 ; After the punching is completed, the stamping die 300 is driven to reset.

[0047] Combined with Figures 3-6 , the fixing rod 310 includes a connecting portion 311 and a mounting portion 312. The connecting portion 311 is connected to an external drive, and the mounting portion 312 is provided at the lower end of the connecting portion 311. An installation groove 3121 is provided on the lower end surface of the mounting portion 312, and the punch 320 is nested in the installation groove 3121. The connecting portion 311 and the mounting portion 312 are fixedly installed by bolt connection. The fixing rod 310 is composed of the connecting portion 311 and the mounting portion 312. The connecting portion 311 is used to receive the input force by connecting with the drive, and the mounting portion 312 is used to mount the punch 320. The punch 320 is installed by an embedding and nesting method, which can ensure the coaxiality of the punch 320. Moreover, with the above-mentioned detachable punch 320, only the punch 320 needs to be replaced after it is worn out after more uses.

[0048] Combined with Figures 3-6 , the punch 320 includes an inlay portion 321 and a first stamping portion 322. The inlay portion 321 is provided at the upper end of the first stamping portion 322, and the inlay portion 321 is nested in the installation groove 3121; in the contact plane between the mounting portion 312 and the first stamping portion 322, the cross-sectional diameter of the fixing rod 310 is larger than that of the punch 320. The inlay portion 321 is used for inlay installation by nesting into the installation groove 3121 of the mounting portion 312, and the horizontal plane where the cross-sectional diameter of the fixing rod 310 is larger than that of the punch 320 is the contact plane between the mounting portion 312 and the first stamping portion 322.

[0049] Combined with Figures 3-6The sleeve die 200 includes a fixed sleeve 210, an abutting sleeve 220 and a supporting bottom plate 230. The abutting sleeve 220 is connected to the lower end of the fixed sleeve 210, and the supporting bottom plate 230 is arranged at the lower end of the abutting sleeve 220. In one horizontal plane, the inner hole diameter of the fixed sleeve 210 is larger than the inner hole diameter of the abutting sleeve 220. The sleeve die 200 is composed of a fixed sleeve 210, an abutting sleeve 220 and a supporting bottom plate 230. After installation, the fixed sleeve 210, the abutting sleeve 220 and the supporting bottom plate 230 are all fixedly arranged. A molding inner cavity is formed in the fixed sleeve 210, the abutting sleeve 220 and the supporting bottom. The workpiece a is extruded by the stamping die 300, and the molding inner cavity is cooperated to form a step surface on the outer wall of the workpiece a, which is the step surface a2 of the outer wall of the workpiece a. Figure 7 .

[0050] Combination Figures 3-6 The punch 320 further includes a second punching portion 323, which is disposed at the lower end of the first punching portion 322; the cross-sectional diameter of the first punching portion 322 is larger than the cross-sectional diameter of the second punching portion 323. Through the relationship between the second punching portion 323 and the first punching portion 322, the inner hole of the workpiece a can be formed with a second inner hole step surface a3, as shown in FIG. Figure 7 .

[0051] Combination Figures 3-6 The unloading sleeve 400 is sleeved on the outside of the fixed rod 310 , and the unloading sleeve 400 can be slid forward and backward along the axis of the fixed rod 310 , and a return spring is arranged between the unloading sleeve 400 and the fixed rod 310 .

[0052] During stamping, the end face of the unloading sleeve 400 contacts the sleeve die 200, the reset spring is compressed, and the unloading sleeve 400 and the stamping die 300 are relatively displaced; after the stamping is completed, the stamping die 300 is reset, and the unloading sleeve 400 and the stamping die 300 are relatively displaced, so that the workpiece a outside the stamping die 300 falls off.

[0053] Combination Figures 3-6 The upper end of the fixing rod 310 is provided with a first step portion 3111, the lower end of the fixing rod 310 is provided with a second step portion 3112, a limiting groove 3113 is formed between the first step portion 3111 and the second step portion 3112, a limiting ring 410 is provided on the inner wall of the discharge sleeve 400, the limiting ring 410 can be slidably embedded in the limiting groove 3113, and a return spring acts between the first step portion 3111 and the limiting ring 410. By setting the above structure, the discharge sleeve 400 is installed.

[0054] Combination Figures 3-6 The demoulding ejector pin 500 is driven and embedded in the sleeve mold 200. The demoulding ejector pin 500 is provided with a vent hole 501, which connects the molding cavity with the outside. The demoulding ejector pin 500 can eject the workpiece a from the molding cavity.

[0055] Combined with Figures 3-6 , a through hole 240 is provided at the bottom of the die sleeve 200. The through hole 240 is located on the supporting bottom plate 230. The demolding ejector rod 500 includes a force-bearing portion 510 and a limiting rod 520. The force-bearing portion 510 is nested inside the die sleeve 200, the limiting rod 520 is provided at the lower end of the force-bearing portion 510, and the limiting rod 520 penetrates through the through hole 240. By driving the limiting rod 520 to make the force-bearing portion 510 perform a piston movement, the workpiece a can be ejected from the forming cavity.

[0056] This structure improves the existing processing technology and solves technical defects such as deformation, dimensional error, and roughness of the machining of this product with a simple structure, greatly improving the production efficiency.

[0057] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope recorded in the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An inner hole stepped surface stamping device for stamping and forming the inner hole of a workpiece (a), characterized in that, including, a stamping platform (100), fixedly arranged; a sleeve mold (200), detachably arranged on the stamping platform (100), provided with a forming inner cavity; a stamping die (300), driven to move up and down, arranged above the sleeve mold (200) and coaxially distributed with the sleeve mold (200); the stamping die (300) includes a fixing rod (310) and a punch head (320), the punch head (320) is connected to the lower end of the fixing rod (310) and coaxially distributed, in one horizontal plane, the cross-sectional diameter of the fixing rod (310) is larger than the cross-sectional diameter of the punch head (320); by driving the stamping die (300), the part of the punch head (320) and the fixing rod (310) close to the punch head (320) can be close to or away from the forming inner cavity of the sleeve mold (200).

2. The inner hole stepped surface stamping device according to claim 1, characterized in that, the fixing rod (310) includes a connecting part (311) and a mounting part (312), the connecting part (311) is connected to an external drive, the mounting part (312) is arranged at the lower end of the connecting part (311), a mounting groove (3121) is arranged on the lower end surface of the mounting part (312), and the punch head (320) is nested in the mounting groove (3121).

3. The inner hole stepped surface stamping device according to claim 2, characterized in that, the punch head (320) includes an inlay part (321) and a first stamping part (322), the inlay part (321) is arranged at the upper end of the first stamping part (322), and the inlay part (321) is nested in the mounting groove (3121); in the contact plane between the mounting part (312) and the first stamping part (322), the cross-sectional diameter of the fixing rod (310) is larger than the cross-sectional diameter of the punch head (320).

4. The inner hole stepped surface stamping device according to claim 3, characterized in that, the sleeve mold (200) includes a fixing sleeve (210), a contact sleeve (220) and a supporting bottom plate (230), the contact sleeve (220) is connected to the lower end of the fixing sleeve (210), and the supporting bottom plate (230) is arranged at the lower end of the contact sleeve (220); in one horizontal plane, the inner hole diameter of the fixing sleeve (210) is larger than the inner hole diameter of the contact sleeve (220).

5. A stamping device for an inner hole stepped surface according to claim 4, characterized in that, the punch head (320) further includes a second stamping part (323), and the second stamping part (323) is arranged at the lower end of the first stamping part (322); the cross-sectional diameter of the first stamping part (322) is larger than the cross-sectional diameter of the second stamping part (323).

6. A punching device for an inner hole step surface, according to any one of claims 1-5, characterized in that, also includes a blanking sleeve (400), the blanking sleeve (400) is sleeved outside the fixing rod (310), and the blanking sleeve (400) can slide forward or backward along the axial direction of the fixing rod (310).

7. The inner hole stepped surface stamping device according to claim 6, characterized in that, a first step part (3111) is arranged at the upper end of the fixing rod (310), a second step part (3112) is arranged at the lower end of the fixing rod (310), a limiting groove (3113) is formed between the first step part (3111) and the second step part (3112), a limiting ring (410) is arranged on the inner wall of the blanking sleeve (400), and the limiting ring (410) can be slidably embedded in the limiting groove (3113).

8. A stamping device for an inner hole stepped surface according to any one of claims 1-5, characterized in that, Further included is a demolding ejector rod (500), the demolding ejector rod (500) is driven to be arranged, the demolding ejector rod (500) is slidably nested in the sleeve mold (200), a vent hole (501) is arranged in the demolding ejector rod (500), and the vent hole (501) communicates the molding inner cavity with the outside.

9. The inner hole stepped surface stamping device according to claim 8, characterized in that, A through hole (240) is arranged at the bottom of the sleeve mold (200), the demolding ejector rod (500) includes a force-bearing part (510) and a limiting rod (520), the force-bearing part (510) is nested in the sleeve mold (200), the limiting rod (520) is arranged at the lower end of the force-bearing part (510), and the limiting rod (520) penetrates through the through hole (240).

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