One-step forming retainer stamping tool and method

Abstract

The present invention relates to the stamping of a retainer cover, and more specifically to a high-precision pneumatic, one-shot forming retainer stamping tool and method. The tool comprises: a stamping tool base, a rough punch, a fine punch, a retainer seat, a positioning plate, a workpiece, a clamping mechanism, and a punch limiting mechanism. The workpiece is connected to the positioning plate via a pin, and a stamping tool base is provided above any position on the circumference of the workpiece. A rough punch and a fine punch are provided within the stamping tool base, and the bottoms of the rough punch and the fine punch extend through the retainer seat to a position above the workpiece. A base outer frame is provided on the periphery of the stamping tool base, and a punch limiting mechanism is provided inside one side of the base outer frame. The workpiece at the upper end of the positioning plate is fixed by a clamping mechanism. The workpiece is clamped by a pressure plate, and one hole is punched each time. After rotating a certain angle, another hole is punched. Rough and fine punching can be completed with one rotation. This stamping tool only requires one clamping, and rough and fine punching can be completed in one go, with good positioning accuracy.

Description

Technical Field

[0001] The invention relates to stamping of a cage cover, in particular to a high-precision pneumatic one-step forming cage stamping tool and method, belonging to the technical field of cage processing. Background Art

[0002] Currently, stamping small and medium-sized copper cage covers requires two sets of stamping tooling: one for roughing and one for fine-blanking. During production, the roughing tooling must be used for stamping before fine-blanking. Furthermore, all punches must be in good working condition. A single problem with a punch in the die can affect the accuracy of the entire workpiece. Installing two sets of dies not only occupies two machine tools, but also requires significant time to debug both sets after installation. Roughing and fine-blanking require two positioning steps, resulting in inconsistent positioning datums. Existing cage tooling has high machine tool requirements and is primarily used for stamping small and medium-sized cages. This results in low production efficiency, but also in the economic benefits of manufacturing two sets of dies and occupying two machine tools, and the stamping accuracy cannot be guaranteed. Summary of the Invention

[0003] In view of the problems of low production efficiency and poor economic benefits of the above-mentioned stamping tooling, the purpose of the present invention is to provide a one-time forming retainer stamping tooling and method for the retainer stamping cover. This stamping tooling only needs to be clamped on one side, and rough and fine punching can be formed in one step; the positioning accuracy is good and the stamping accuracy is guaranteed.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a one-time forming retainer stamping tool, comprising: a stamping tool base, a rough punch, a fine punch, a retainer seat, a positioning plate, a workpiece, a clamping mechanism, and a punch limiting mechanism; the workpiece is connected to the positioning plate by a pin shaft, a stamping tool base is provided above any position of the workpiece circumference, a rough punch and a fine punch are provided in the stamping tool base, the bottoms of the rough punch and the fine punch pass through the retainer seat and extend to the position above the workpiece, a base outer frame is provided on the periphery of the stamping tool base, and a punch limiting mechanism is provided inside one side of the base outer frame; the workpiece at the upper end of the positioning plate is fixed by a clamping mechanism;

[0005] Furthermore, the rough punch and the fine punch extend downward from the stamping tool base, extend out of the base frame and extend into the retainer seat;

[0006] Furthermore, the retainer seat is provided with a slot that matches the diameter of the outer flange of the retainer cover, so that the outer flange of the retainer is embedded in the slot of the retainer seat for positioning;

[0007] Furthermore, the punch limiting mechanism includes: a pad and a locking bolt; the locking bolt passes through the upper surface of the base outer frame, an outer side wall of the base outer frame in the area where the locking bolt passes is provided with an open groove, a lower base plate having the same area as the base outer frame is provided on the bottom of the base outer frame, the open groove of the base outer frame and the upper surface of the lower base plate form an open cavity, and a pad is inserted into the open cavity;

[0008] The pad is a cubic structure, the width of the pad is greater than the depth of the open cavity, so that a part of the pad extends outside the base frame, and the extended part of the pad is convenient for extracting the pad.

[0009] The fine punching head passes through the lower base plate and extends into the cage seat at the bottom to align with the cage; when rough punching the first hole, the spacer is removed. During punching, the fine punching head is pressed back, leaving only the rough punching head to work. After punching the first hole, the spacer is inserted and fixed with a locking bolt. At this time, the fine punching head is fixed and fine punching can be achieved.

[0010] The clamping mechanism adopts a pneumatic method, including: a cylinder, several pressing plates, and an angle cylinder. The cylinder is set at the center of the positioning plate, and the several pressing plates are evenly distributed along the circumference of the positioning plate at equal angles. The bottoms of the several pressing plates are respectively connected to a corner cylinder, and the several corner cylinders are respectively connected to the cylinder through air pipes. By controlling the cylinder, the pressing plate is pressed and loosened under the action of the angle cylinder.

[0011] Furthermore, one end of the pressing plate is a free end, and the other end is connected to the telescopic rod of the angular cylinder. The bottom of the telescopic rod is the angular cylinder body, and the cylinder body is connected to an air inlet pipe and an air outlet pipe for the telescopic rod to extend and retract. The extension and retraction of the telescopic rod relative to the cylinder body includes a downward stroke and a rotation stroke. When the telescopic rod retracts, the pressing plate rotates and presses downward with the compression rod until the free end of the pressing plate presses the retaining frame; when the telescopic rod extends, the pressing plate rotates and rises with the compression rod until the free end of the pressing plate leaves the surface of the stamping area of ​​the retaining frame.

[0012] The cylinder can control each corner cylinder separately through the air pipe. When the pressing plate approaches the stamping area, it will automatically release and avoid it. After passing the stamping area, it will continue to clamp.

[0013] The method of using the above-mentioned retainer stamping tooling is:

[0014] (1) The workpiece is placed on the positioning plate and positioned with a pin to limit circumferential rotation; the relevant instructions on the machine control panel are operated to make the pressure plate connected to the cylinder press the workpiece under the action of the angle cylinder;

[0015] (2) Loosen the locking bolts in the tooling, remove the pad, and according to the machine tool instructions, make the rough punch complete the first rough punch;

[0016] In the first rough punching, the pad is removed and only the rough punch is working. The fine punch is in the retracted state during the rough punching and is pressed back during the punching.

[0017] (3) After the first punching of step (2) is completed, the pad is installed in the punching tool and tightened with the locking bolt. At this time, the fine punching head is fixed;

[0018] (4) Adjust the cylinder to release the workpiece from the pressing plate, and the positioning plate rotates to drive the workpiece to rotate a certain angle. At this time, the hole to be rough punched is located below the rough punch head, and the hole just completed rough punching is located just below the fine punch head. The value of the rotation angle is set according to the requirements.

[0019] (5) Start the machine tool, press the workpiece with the pressure plate, and perform continuous punching. After punching n+1 times, all holes are finely punched (n=the number of equally divided holes in the workpiece).

[0020] The beneficial effects of the present invention are:

[0021] The press plate clamps the workpiece, punching one hole at a time. After rotating the workpiece a certain angle, the next hole is punched. A single rotation completes both rough and fine punching. This stamping tool requires only one clamping setup, completing both rough and fine punching in one operation. It offers excellent positioning accuracy, a good fit with the cage seat, and stable product quality, meeting customer requirements while improving production efficiency and economic benefits over existing stamping tools. This fills a domestic gap in the market for extra-large stamped cages exceeding one meter in length. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural diagram of the working state of the retainer stamping tooling of the present invention.

[0023] Figure 2 for Figure 1 Some structural details.

[0024] Figure 3 for Figure 1 A partial enlarged view of .

[0025] Figure 4 for Figure 3 Top view of .

[0026] Figure 5 for Figure 3 A partial cross-sectional view of .

[0027] In the figure, 1, stamping tool base, 2, locking bolt, 3, spacer, 4, cylinder, 5, pressure plate, 6, workpiece, 7, positioning plate, 8, rough punch, 9, fine punch, 10, corner cylinder, 11, lower base plate. DETAILED DESCRIPTION

[0028] The present invention will be described in detail below with reference to the accompanying drawings. The present invention will be described in detail below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them.

[0029] like Figure 1-5 As shown, the embodiment of the present invention is to install two punches for rough punching and fine punching on a stamping die, and when punching the first hole, only the rough punch works. After the rough punching of the first hole is completed, the pad is inserted into the die and locked, so that the rough punch and the fine punch work at the same time. The one-time forming retainer stamping tool using the above working principle includes: a stamping tool base 1, a rough punch 8, a fine punch 9, a retainer seat, a positioning plate 7, a workpiece 6, a clamping mechanism, and a punch limiting mechanism; the workpiece 6 is connected to the positioning plate 7 through a pin shaft, and a stamping tool base 1 is provided above any position on the circumference of the workpiece 6, and a rough punch 8 and a fine punch 9 are provided in the stamping tool base 1. The bottom of the rough punch 8 and the fine punch 9 pass through the retainer seat and extend to the upper position of the workpiece 6. A base outer frame is provided on the periphery of the stamping tool base 1, and a punch limiting mechanism is provided inside one side of the base outer frame; the workpiece 6 at the upper end of the positioning plate 7 is fixed by a clamping mechanism;

[0030] The rough punch 8 and the fine punch 9 extend downward from the stamping tool base 1, extend out of the base frame and extend into the cage seat;

[0031] The retainer seat is provided with a slot that matches the diameter of the outer flange of the retainer cover, so that the outer flange of the retainer is embedded in the slot of the retainer seat for positioning;

[0032] The punch limiting mechanism includes: a pad 3 and a locking bolt 2; the locking bolt 2 passes through the upper surface of the base outer frame, and an open groove is formed on the outer wall of the base outer frame in the area where the locking bolt 2 passes. A lower base plate 11 with the same area as the base outer frame is provided at the bottom of the base outer frame. The open groove of the base outer frame and the upper surface of the lower base plate 11 form an open cavity, and the pad 3 is inserted into the open cavity.

[0033] The cushion block 3 is a cubic structure, and the width of the cushion block 3 is greater than the depth of the open cavity, so that a portion of the cushion block 3 extends outside the outer frame of the base body, and the extended portion of the cushion block 3 is convenient for extracting the cushion block 3 .

[0034] The fine punching head 9 passes through the lower base plate 11 and extends into the retaining seat at the bottom to align with the retaining frame; when rough punching the first hole, the pad 3 is taken out, and when punching, the fine punching head 9 is pressed back, leaving only the rough punching head 8 to work. After punching the first hole, the pad 3 is inserted and fixed with the locking bolt 2. At this time, the fine punching head 9 is fixed and the fine punching work can be achieved.

[0035] The clamping mechanism adopts a pneumatic method, including: a cylinder 4, a plurality of pressure plates 5, and an angle cylinder 10. The cylinder 4 is arranged at the center of the positioning plate 7, and the plurality of pressure plates 5 are evenly distributed along the circumference of the positioning plate 7 at equal angles. The bottom of each of the pressure plates 5 is connected to a corner cylinder 10, and the plurality of corner cylinders 10 are connected to the cylinder 4 through air pipes. By controlling the cylinder 4, the pressure plate 5 is pressed and loosened under the action of the angle cylinder.

[0036] One end of the pressing plate 5 is free, and the other end is connected to the telescopic rod of the angular cylinder 10. The bottom of the telescopic rod is the cylinder body of the angular cylinder 10, and the cylinder body is connected to an air inlet pipe and an air outlet pipe for the extension and retraction of the telescopic rod. The extension and retraction of the telescopic rod relative to the cylinder body includes a downward stroke and a rotation stroke. When the telescopic rod retracts, the pressing plate 5 rotates and presses down with the compression rod until the free end of the pressing plate presses the retainer; when the telescopic rod extends, the pressing plate 5 rotates and rises with the compression rod until the free end of the pressing plate 5 leaves the surface of the stamping area of ​​the retainer.

[0037] The cylinder 4 can control each corner cylinder 10 separately through the air pipe. When the pressing plate 5 approaches the stamping area, it automatically releases and avoids, and continues to clamp after passing the stamping area.

[0038] The specific working steps of this embodiment are as follows:

[0039] (1) The workpiece 6 is placed on the positioning plate 7 and positioned with a pin to limit circumferential rotation; the relevant instructions on the machine control panel are operated so that the pressure plate 5 connected to the cylinder 4 presses the workpiece under the action of the corner cylinder 10;

[0040] (2) Loosen the locking bolt 2 in the tooling, remove the pad 3, and according to the machine tool instructions, make the rough punch 8 complete the first rough punch;

[0041] In the first rough punching, the spacer 3 is removed and only the rough punch 8 is working. During the rough punching, the fine punch 9 is in the retracted state and is pressed back during the punching.

[0042] (3) After the first punching of step (2) is completed, the pad 3 is installed in the punching tool and tightened with the locking bolt 2. At this time, the fine punching head 9 is fixed;

[0043] (4) Adjust the cylinder 4 so that the pressure plate 5 releases the workpiece 6, and the positioning plate 7 rotates to drive the workpiece 6 to rotate a certain angle. At this time, the hole to be rough-punched is located below the rough punch 8, and the hole just completed by rough punching is located just below the fine punch 9. The value of the rotation angle is set according to the requirements.

[0044] (5) Start the machine tool, press the workpiece with the pressing plate 5, and perform continuous punching. After punching n+1 times, all holes are finely punched (n=the number of equally divided holes in the workpiece).

[0045] This high-precision, single-stage stamping pneumatic press tooling saves the time required to adjust two sets of dies. Furthermore, compared to the original tooling, this tooling has lower machine tool size requirements, can stamp a wider range of workpiece sizes, and has higher precision, significantly improving both work efficiency and economic benefits during production.

[0046] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A stamping method for a one-step forming retainer stamping tool, characterized in that: The steps include: (1) The workpiece is placed on the positioning plate and positioned with a pin to limit circumferential rotation; the relevant instructions on the machine control panel are operated to make the pressure plate connected to the cylinder press the workpiece under the action of the angle cylinder; (2) Loosen the locking bolts in the tooling, remove the pad, and according to the machine tool instructions, make the rough punch complete the first rough punch; (3) After the first punching of step (2) is completed, the pad is installed in the punching tool and tightened with the locking bolt. At this time, the fine punching head is fixed; (4) Adjust the cylinder to release the workpiece from the pressing plate, and the positioning plate rotates to drive the workpiece to rotate a certain angle. At this time, the hole to be rough punched is located below the rough punch head, and the hole just completed rough punching is located just below the fine punch head; (5) Start the machine tool, press the workpiece with the pressing plate, and perform continuous punching. After punching n+1 times, all holes are finely punched. In the first rough punching of step (2), the pad is removed and only the rough punch is working. The fine punch is in a retracted state during rough punching and is pressed back during punching. In step (5), n = the number of equally divided holes in the workpiece; The one-time forming retainer stamping tool used in the stamping method includes: a stamping tool base, a rough punch, a fine punch, a retainer seat, a positioning plate, a workpiece, a clamping mechanism, and a punch limiting mechanism; the workpiece is connected to the positioning plate through a pin shaft, and a stamping tool base is provided above any position of the workpiece circumference, and a rough punch and a fine punch are provided in the stamping tool base, and the bottoms of the rough punch and the fine punch pass through the retainer seat and extend to the upper position of the workpiece, and a base outer frame is provided on the periphery of the stamping tool base, and a punch limiting mechanism is provided inside one side of the base outer frame; the workpiece at the upper end of the positioning plate is fixed by a clamping mechanism; The punch limiting mechanism includes: a pad and a locking bolt; the locking bolt passes through the upper surface of the base outer frame, and an open groove is formed on the outer wall of the base outer frame in the area where the locking bolt passes through. A lower base plate with the same area as the base outer frame is provided on the bottom of the base outer frame, and the open groove of the base outer frame and the upper surface of the lower base plate form an open cavity, and a pad is inserted into the open cavity; The clamping mechanism adopts a pneumatic method, including: a cylinder, several pressing plates, and an angle cylinder. The cylinder is set at the center of the positioning plate, and the several pressing plates are evenly distributed along the circumference of the positioning plate at equal angles. The bottoms of the several pressing plates are respectively connected to a corner cylinder, and the several corner cylinders are respectively connected to the cylinder through air pipes. By controlling the cylinder, the pressing plate is pressed and loosened under the action of the angle cylinder. One end of the pressing plate is a free end, and the other end is connected to the telescopic rod of the angular cylinder. The bottom of the telescopic rod is the angular cylinder body, and the cylinder body is connected to an air inlet pipe and an air outlet pipe for the telescopic rod to extend and retract; the extension and retraction of the telescopic rod relative to the cylinder body includes a downward stroke and a rotation stroke. When the telescopic rod retracts, the pressing plate rotates and presses down with the compression rod until the free end of the pressing plate presses the retaining frame; when the telescopic rod extends, the pressing plate rotates and rises with the compression rod until the free end of the pressing plate leaves the surface of the stamping area of ​​the retaining frame.

2. The stamping method of the one-step forming retainer stamping tool according to claim 1, characterized in that: The retainer seat is provided with a slot which matches the diameter of the outer flange of the retainer cover, so that the outer flange of the retainer is embedded in the slot of the retainer seat.

3. The stamping method of the one-step forming retainer stamping tool according to claim 1, characterized in that: The pad is a cubic structure, and the width of the pad is greater than the depth of the open cavity, so that a part of the pad extends outside the outer frame of the base.

4. The stamping method of the one-step forming retainer stamping tool according to claim 1, characterized in that: Step (4) The value of the rotation angle is set as required.

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