Automatic feeding mechanism of stamping stretcher

Abstract

The invention discloses an automatic feeding mechanism of a stamping and stretching machine, relates to the field of stamping and stretching equipment, and aims to solve the problems of low efficiency and poor safety of traditional manual displacement. The mechanism comprises a lifting assembly, a translation assembly, a clamping assembly, upper male dies and lower female dies, the lower female dies and the upper male dies are in one-to-one correspondence to form eight progressive machining stations, and cavities are sequentially reduced from left to right; after a workpiece is clamped by a V-shaped clamp block of the clamping assembly, the lifting assembly drives the workpiece to be lifted and separated from the lower female die, the translation assembly drives the workpiece to move to the next station, stretching is completed in cooperation with the upper male die, and automatic machining is circularly achieved. Manual intervention in a die area is not needed, the machining efficiency is improved by 50% or above compared with a traditional mode, the positioning precision is high, and the device is suitable for a multi-station progressive stretching scene and can be widely applied to batch machining of cylindrical workpieces, cup-shaped workpieces and the like.

Description

Technical Field

[0001] The invention relates to the technical field of stamping and stretching equipment, in particular to an automatic feeding mechanism for a stamping and stretching machine. Background Art

[0002] In the field of stamping and stretching processing, for workpieces that require multiple progressive forming steps (such as deep cylindrical parts and complex curved parts), traditional processing methods rely on multiple sets of independent molds for step-by-step stretching, and manual intervention is required to complete the shifting operation of the workpiece between the molds. This has the following technical defects:

[0003] Low safety: Manual shifting requires reaching into the mold work area, which can easily lead to work-related injuries due to accidental equipment startup or operational errors. This significantly increases safety risks, especially in high-frequency processing scenarios.

[0004] Low processing efficiency: A single processing can only process a single workpiece. Manual placement and positioning are time-consuming, and the switching interval between workstations is long. Taking 8-station stretching as an example, the traditional manual method can only complete 30-40 pieces of processing per hour, which cannot meet the needs of mass production.

[0005] Poor positioning accuracy: Manual shifting relies on experience and judgment, which can easily cause the workpiece to deviate from the mold cavity, resulting in uneven stretched wall thickness, edge cracking and other defective products. The defective rate is usually higher than 5%;

[0006] High operation intensity: Repeated picking, placing and shifting actions over a long period of time can easily lead to operator fatigue, further reducing processing accuracy and efficiency, and fatigue leads to increased safety risks.

[0007] While existing technologies offer simple feeding devices, most are single-station reciprocating structures that are unable to adapt to the requirements of multi-station progressive stretching. Furthermore, they lack workpiece protection and precise positioning, making it difficult to address the aforementioned core issues. Therefore, a feeding mechanism that can achieve automatic multi-station coordination, high precision, and high safety is urgently needed to fill this gap in the existing technology. Summary of the Invention

[0008] In view of the problems existing in the prior art, the present invention aims to overcome the defects of "manual shifting" in traditional stamping and stretching processing, improve the continuity of multi-station stretching, shorten the station switching time, and improve batch processing efficiency and safety.

[0009] An automatic feeding mechanism for a stamping and stretching machine, comprising:

[0010] Lifting components, installed on the left and right sides of the lower die of the punching and stretching machine, are used to move the workpiece up and down;

[0011] A translation assembly is horizontally mounted on the lifting assembly and can move left and right relative to the lifting assembly; the translation assembly is arranged corresponding to the lower concave die and is used for horizontal movement of the workpiece left and right;

[0012] The clamping assemblies are fixedly mounted on the translation assembly and are arranged in pairs on the front and rear sides of the lower die, and are used to clamp the workpiece placed on the lower die;

[0013] The upper punch is installed on the driving component at the top of the punching and stretching machine, and is responsible for directly applying pressure to the workpiece to complete the stretching and forming action;

[0014] The lower concave die is fixed on the die base, and the die base is installed horizontally in the middle of the work table of the stamping and stretching machine; the lower concave die and the upper punch cooperate to form a die cavity, which is used to support the workpiece and guide its forming.

[0015] As a preferred solution of the present invention, the lifting assembly includes: a lifting seat and a lifting cylinder, the lifting cylinder is fixedly installed on the work table, and the protruding end of the lifting cylinder is fixedly connected to the middle position of the bottom surface of the lifting seat; the lifting seat is a rectangular block structure and is longitudinally arranged on the left and right sides of the lower die.

[0016] As a preferred solution of the present invention, guide columns are installed between the upper punch and the lower die. There are four guide columns and they are vertically installed at the four corner positions of the lower die. The upper punch is driven by the driving component and guided by the guide columns to slide downward and cooperate with the lower die to stretch the workpiece; the lifting seat is slidably installed on the guide columns through the vertically opened guide holes.

[0017] As a preferred solution of the present invention, a groove is provided on the upper surface of the lifting seat at the right end, and an oblique discharge port for discharging materials is installed in the groove.

[0018] As a preferred solution of the present invention, the translation assembly includes a transverse cylinder and a transverse frame; the transverse frame is composed of a transverse cylindrical rod and vertical support plates distributed in parallel in the longitudinal direction, the cylindrical rod is perpendicular to the vertical support plates and is distributed according to the four vertices of a rectangle; a sliding hole is opened horizontally on the lifting seat, and the transverse frame is slidably installed in the sliding hole; the transverse cylinder is installed between the vertical support plate at the left end and the lifting seat, and is used to drive the transverse frame to move left and right.

[0019] As a preferred solution of the present invention, two vertical support plates are provided at the left end of the lifting seat, and the transverse movement cylinder is horizontally fixedly installed between the two vertical support plates; the transverse movement cylinder has double protruding ends, namely a left protruding end and a right protruding end, the end of the left protruding end passes through the vertical support plate on the left and is fixedly connected to the limiting head; the end of the right protruding end passes through the vertical support plate on the right and is fixedly connected to the left end face of the lifting seat; when the double protruding ends of the transverse movement cylinder are extended or retracted, the transverse movement frame is driven to slide left and right along the sliding hole of the lifting seat by connecting the vertical support plates.

[0020] As a preferred solution of the present invention, the clamping assembly includes a horizontal plate and a clamping cylinder, the horizontal plate is fixedly mounted on the translation assembly and is arranged on both sides thereof parallel to the lower die; the clamping cylinder is fixedly mounted on the side of the horizontal plate through a cylinder support; the upper end surface of the horizontal plate is equidistantly mounted with slide grooves, the cross-section of the slide grooves is a square frame structure, and a clamp block is slidably mounted in the slide grooves; the first protruding end of the clamping cylinder passes through the cylinder support and is fixedly connected to the clamp block, and the clamping cylinder can drive the first protruding end to move horizontally in the front and rear directions to clamp and release the workpiece.

[0021] As a preferred solution of the present invention, the cylinder support is a vertically arranged "X"-shaped structure, the lower half of which is fixed to the side of the horizontal plate by screws, and the upper half is assembled with a clamping cylinder by screws, so that the clamping cylinder can drive the first protruding end to move horizontally.

[0022] As a preferred solution of the present invention, the clamp block is a V-shaped block structure, and the workpiece is clamped by the V-shaped notch of the V-shaped block structure to ensure the accuracy of clamping the workpiece.

[0023] As a preferred solution of the present invention, a buffer strip is provided inside the V-groove of the V-shaped block structure for buffering the impact force on the workpiece clamping.

[0024] As a preferred solution of the present invention, the lower concave die and the upper punch correspond to each other one by one and form eight processing stations, and the cavities of the lower concave die and the upper punch shrink from left to right to achieve progressive stretching processing.

[0025] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0026] 1. No manual labor is required to enter the mold work area during the entire process. Material loading only needs to be performed at the first work station, eliminating the risk of accidental hand contact and complying with safety production standards.

[0027] 2. Through multi-station parallel processing and automatic circulation, the 8-station processing efficiency is increased to 80-100 pieces per hour, which is more than 50% higher than the traditional manual method;

[0028] 3. The guide column ensures the clamping accuracy of the upper punch and lower die. The cylinders of the translation assembly and the lifting assembly move accurately to ensure the accuracy of station switching. The overall positioning error is greatly reduced, and the defective rate is reduced to below 0.5%;

[0029] 4. The V-shaped structure of the fixture block is suitable for workpieces of various specifications, and the internal buffer strips prevent clamping damage, which can effectively protect the workpiece and equipment parts, improve precision, and extend practical life;

[0030] 5. This mechanism can adapt to the progressive stretching of various special-shaped workpieces such as cup-shaped, cylindrical, and conical shapes by adjusting the cavity shape of the lower die and the upper punch. It has strong adaptability and does not require overall replacement of the mechanism, reducing equipment modification costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic top view of the overall structure of the present invention;

[0032] Figure 2 It is a front view schematic diagram of the overall structure of the present invention;

[0033] Figure 3 It is a left side schematic diagram of the overall structure of the present invention;

[0034] Figure 4 It is a right side schematic diagram of the overall structure of the present invention;

[0035] Figure 5 It is a top view of the overall structure of the present invention and the assembled state of the lower concave mold;

[0036] Figure 6 It is a front view schematic diagram of the overall structure of the present invention and the assembly state of the lower concave die and the upper convex die;

[0037] Figure 7 An enlarged view of the lifting assembly and guide column and a schematic diagram of the lifting cylinder of the present invention;

[0038] Figure 8 The figures are front and top views of the stretched workpiece of the present invention in sequential stretching states.

[0039] In the figure: 1. Limit head; 2. Transverse cylinder; 3. Cylindrical rod; 4. Double extension end; 5. Guide column; 6. Lifting seat; 7. Horizontal plate; 8. Clamping cylinder; 9. Cylinder support; 10. First extension end; 11. Slide; 12. Fixture block; 13. Vertical support plate; 14. Oblique discharge port; 15. Work table; 16. Mold base; 17. Lower die; 18. Lifting cylinder; 19. Upper punch. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0041] Example 1

[0042] like Figures 1 to 8 As shown, a specific embodiment of the automatic feeding mechanism of a stamping and stretching machine described in the present invention includes a lifting component, a translation component, a clamping component, an upper punch and a lower die. These components cooperate to achieve automatic feeding and stretching forming. The specific structure is as follows:

[0043] Lower die 17: The lower die 17 is fixed to the die base 16, which is installed horizontally in the middle of the work surface 15. It corresponds to the upper punch 19 one by one to form eight processing stations. The cavities of the eight sets of lower dies 17 and upper punch 19 decrease from left to right to meet the requirements of progressive stretching. The lower die 17 is used to support the workpiece and guide the workpiece to form according to the shape of the cavity.

[0044] Upper punch 19: mounted on a driving component (such as a hydraulic cylinder or a pneumatic cylinder, not shown) on the upper portion of the punching and stretching machine. It can be driven by the driving component to slide up and down along the guide column 5, directly applying pressure to the workpiece to complete the stretching and forming operation.

[0045] Lifting assembly: Installed on the left and right sides of the lower die 17, used to move the workpiece up and down to remove or insert it into the lower die 17; includes a lifting seat 6 and a lifting cylinder 18. The lifting cylinder 18 is fixed to the work surface 15, and its extended end is fixedly connected to the middle position of the bottom surface of the lifting seat 6. The lifting seat 6 is a rectangular block structure, arranged longitudinally on the left and right sides of the lower die 17, and the front and rear ends of the lifting seat 6 are slidably mounted on the guide posts 5 through vertical guide holes to ensure a smooth and non-deflecting lifting process.

[0046] Translation assembly: horizontally installed on the lifting seat 6 of the lifting assembly, used to drive the workpiece to move left and right to switch work positions; it includes a transverse cylinder 2 and a transverse frame, the transverse frame consists of a transverse cylindrical rod 3 and a vertical support plate 13 distributed parallel to the longitudinal direction. The cylindrical rod is perpendicular to the vertical support plate 13 and is distributed according to the four vertices of a rectangle, and the structure is stable; a sliding hole is opened horizontally on the lifting seat 6, and the transverse frame is slidably installed in the sliding hole; the transverse cylinder 2 is horizontally fixed between the two vertical support plates 13 at the left end of the lifting seat 6, and the transverse cylinder 2 has a double extension end 4 (left extension end and right extension end), the left extension end passes through the left vertical support plate 13 and is connected to the limit head 1, the right extension end passes through the right vertical support plate 13 and is fixedly connected to the left end face of the lifting seat 6; the transverse cylinder 2 can be extended and retracted through the double extension end 4, driving the transverse frame to move left and right along the sliding hole of the lifting seat 6, and the limit head 1 is used to limit the maximum right movement stroke of the transverse frame to avoid overtravel collision;

[0047] Clamping assembly: fixed on the transverse frame of the translation assembly, and arranged in pairs on the front and rear sides of the lower die 17, used to clamp the workpiece; including a horizontal plate 7, a clamping cylinder 8, a cylinder support 9, a slide 11 and a clamp block 12. The horizontal plate 7 is fixed on the upper surface of the vertical support plate 13 of the transverse frame and is arranged on both sides thereof parallel to the lower die 17; the cylinder support 9 is a vertical "X"-shaped structure, the lower half of which is fixed to the side of the horizontal plate 7 by screws, and the upper half is assembled with the clamping cylinder 8 by screws; the upper end surface of the horizontal plate 7, etc. A slide groove 11 with a square cross-section is installed, and a clamp block 12 is slidably installed in the slide groove 11; the first protruding end 10 of the clamping cylinder 8 passes through the cylinder support 9 and is fixedly connected to the clamp block 12, which can drive the clamp block 12 to move horizontally in the front and rear directions to achieve clamping and releasing of the workpiece; the clamp block 12 is a V-shaped block structure, and a buffer strip (not shown) is provided inside its V-shaped groove. The V-shaped groove can adapt to workpieces of different diameters to ensure clamping accuracy. The buffer strip can buffer the clamping impact force and avoid damage to the workpiece surface.

[0048] Furthermore, a hydraulic shock absorber (not shown) is installed between the lifting seat 6 and the work surface 15;

[0049] The PLC control system uses existing products, such as Siemens S7-1200, etc., and other existing models that can achieve the purpose of the solution can also be used without limitation; the transverse cylinder 2 uses a double-extending end cylinder, and other cylinders can use existing products according to actual needs.

[0050] The mechanism uses a PLC control system (not shown) to coordinate the movements of various components. The specific processing process is as follows:

[0051] Initial state: All components are reset, the upper punch 19 is in the upper position, the clamping component is in the released state, and the translation component is in the left limit position (corresponding to the first station);

[0052] Loading and primary stretching: The operator places the workpiece to be processed on the lower die 17 of the first station and starts the equipment; the PLC controls the upper punch 19 to slide downward along the guide column 5, cooperating with the lower die 17 to complete the primary stretching, and then the upper punch 19 is reset;

[0053] Clamping and lifting: The clamping cylinder 8 is activated, driving the first extension end 10 to push the clamp block 12 along the slide 11 to clamp the workpiece after the primary stretching; then the lifting cylinder 18 extends, driving the lifting seat 6 and the translation assembly and clamping assembly to move upward as a whole, so that the workpiece is separated from the lower die 17;

[0054] Station switching: The left end of the traverse cylinder 2 extends and the right end retracts, driving the traverse frame and the clamping assembly to move one station to the right (corresponding to the second station). The limit head 1 stops when it contacts the vertical support plate 13 to ensure the shift accuracy;

[0055] Secondary stretching and circulation: the operator re-places the new workpiece at the first station and starts the equipment again; the lifting cylinder 18 contracts, driving the workpiece downward so that the bottom of the workpiece is placed on the cavity opening of the lower die 17 of the second station; the upper punch 19 forms downward, and the lifting assembly moves downward synchronously with the upper punch 19 to ensure that the workpiece fits the cavity completely; after forming, the upper punch 19 is reset, the clamping assembly is released, and the transverse movement assembly is reset to the left limit position; the clamping assembly clamps the "new workpiece at the first station" and the "workpiece after processing at the second station" again, repeating the lifting, shifting, and stretching actions until the workpiece completes the final stretching at the eighth station, and finally slides out through the oblique discharge port 14.

[0056] The components in this article are all universal standard parts or components known to those skilled in the art. Their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods, so they will not be described in detail here.

[0057] Although the specific embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by ordinary technicians in this field, various changes can be made without departing from the purpose of the present invention. Modifications or deformations that do not involve creative work are still within the scope of protection of the present invention.

Claims

1. An automatic feeding mechanism for a stamping and stretching machine, characterized in that: include: A lifting assembly is installed on the left and right sides of the lower concave die (17) of the punching and stretching machine, and is used for moving the workpiece up and down; A translation assembly is horizontally mounted on the lifting assembly and can move left and right relative to the lifting assembly; the translation assembly is arranged corresponding to the lower concave die (17) and is used for horizontal movement of the workpiece left and right; A clamping assembly is fixedly mounted on the translation assembly and is arranged in pairs on the front and rear sides of the lower concave die (17), the clamping assembly being used to clamp a workpiece placed on the lower concave die (17); The upper punch (19) is mounted on the driving component of the upper part of the punching and stretching machine and is responsible for directly applying pressure to the workpiece to complete the stretching and forming action; The lower concave die (17) is fixed on the die base (16), and the die base (16) is horizontally installed in the middle position of the working table (15) of the punching and stretching machine; the lower concave die (17) cooperates with the upper punch (19) to form a die cavity for supporting the workpiece and guiding its molding.

2. The automatic feeding mechanism of a punching and stretching machine according to claim 1, characterized in that: The lifting assembly comprises: a lifting seat (6) and a lifting cylinder (18), wherein the lifting cylinder (18) is fixedly mounted on the work surface (15), and the protruding end of the lifting cylinder (18) is fixedly connected to the middle position of the bottom surface of the lifting seat (6); the lifting seat (6) is a rectangular block structure and is longitudinally arranged on the left and right sides of the lower concave mold (17).

3. The automatic feeding mechanism of a punching and stretching machine according to claim 2, characterized in that: A guide column (5) is installed between the upper punch (19) and the lower die (17). The guide columns (5) are provided in four pieces and are vertically installed at the four corner positions of the lower die (17). The upper punch (19) is driven by a driving component and guided by the guide columns (5) to slide downward and cooperate with the lower die (17) to stretch and form the workpiece; the lifting seat (6) is slidably installed on the guide columns (5) through a guide hole opened vertically.

4. The automatic feeding mechanism of a punching and stretching machine according to claim 2, characterized in that: A groove is provided on the upper surface of the lifting seat (6) at the right end, and an oblique discharge port (14) for discharging materials is installed in the groove.

5. The automatic feeding mechanism of a punching and stretching machine according to claim 2, characterized in that: The translation assembly includes a transverse cylinder (2) and a transverse frame; the transverse frame is composed of a transverse cylindrical rod (3) and a vertical support plate (13) distributed in parallel in the longitudinal direction, the cylindrical rod (3) is perpendicular to the vertical support plate (13) and is distributed according to the four vertices of a rectangle; a sliding hole is opened transversely on the lifting seat (6), and the transverse frame is slidably installed in the sliding hole; the transverse cylinder (2) is installed between the vertical support plate (13) at the left end and the lifting seat (6) to drive the transverse frame to move left and right.

6. The automatic feeding mechanism of a punching and stretching machine according to claim 5, characterized in that: The vertical support plates (13) at the left end of the lifting seat (6) are provided in two numbers, and the transverse cylinder (2) is fixedly installed horizontally between the two vertical support plates (13); the transverse cylinder (2) has two protruding ends (4), and the two protruding ends (4) are a left protruding end and a right protruding end. The end of the left protruding end passes through the vertical support plate (13) on the left and is fixedly connected to the limiting head (1); the end of the right protruding end passes through the vertical support plate (13) on the right and is fixedly connected to the left end face of the lifting seat (6); when the two protruding ends (4) of the transverse cylinder (2) are extended or retracted, the transverse frame is driven to slide left and right along the sliding hole of the lifting seat (6) by connecting the vertical support plates (13).

7. The automatic feeding mechanism of a punching and stretching machine according to claim 1, characterized in that: The clamping assembly includes a horizontal plate (7) and a clamping cylinder (8), wherein the horizontal plate (7) is fixedly mounted on the translation assembly and is arranged on both sides thereof in parallel with the lower die (17); the clamping cylinder (8) is fixedly mounted on the side of the horizontal plate (7) through a cylinder support (9); a slide groove (11) is equidistantly mounted on the upper end surface of the horizontal plate (7), the cross section of the slide groove (11) is a square frame structure, and a clamp block (12) is slidably mounted in the slide groove (11); the first protruding end (10) of the clamping cylinder (8) passes through the cylinder support (9) and is fixedly connected to the clamp block (12), and the clamping cylinder (8) can drive the first protruding end (10) to move horizontally in the front-rear direction to clamp and release the workpiece.

8. The automatic feeding mechanism of a punching and stretching machine according to claim 7, characterized in that: The cylinder support (9) is a vertically arranged "F"-shaped structure, the lower half of which is fixed to the side of the horizontal plate (7) by screws, and the upper half is assembled with the clamping cylinder (8) by screws, so that the clamping cylinder (8) can drive the first extension end (10) to move horizontally.

9. The automatic feeding mechanism of a stamping and stretching machine according to claim 7, characterized in that: The clamp block (12) is a V-shaped block structure, and the workpiece is clamped through the V-shaped notch of the V-shaped block structure to ensure the accuracy of clamping the workpiece; a buffer strip is provided inside the V-shaped groove of the V-shaped block structure to buffer the impact force on the workpiece clamping.

10. The automatic feeding mechanism of a stamping and stretching machine according to claim 1, characterized in that: The lower concave die (17) and the upper punch (19) correspond to each other one by one and form eight processing stations, and the cavities of the lower concave die (17) and the upper punch (19) are successively reduced from left to right to realize progressive stretching processing.

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