A metal parts forming device

Abstract

The present invention discloses a metal parts forming device comprising: a driving slider driven by a crank drive mechanism to slide up and down within a guide slot within a machine frame; a core column fixedly connected to the underside of the driving slider and capable of sliding upward and downward through an upper die base; a die head, which is a rotating body, being detachably fixedly connected to the lower end of the core column; a die mounted on the lower die base and cooperating with the die head for stamping and forming; and an impact buffer mechanism located above the upper die base. This solution further enhances the reliability of the device.

Description

Technical Field

[0001] The invention relates to the technical field of metal parts forming, in particular to a device for bolt stamping forming. Background Art

[0002] A Chinese utility model patent is disclosed in the prior art, with patent number CN201721749507.

[0003] This patent utilizes a crank transmission mechanism to drive the driving slider to move up and down along the guide groove. If it is found that the driving slider moves downward too far, a vibration sensor provided on the upper mold base is often used to sense it, triggering a feedback mechanism to suspend the molding device.

[0004] However, since stamping conditions are often harsh and the vibration is complex, the vibration sensor can easily fail or be damaged. Moreover, if the driving slider moves too far downward and impacts the upper die seat, over time, it will often cause structural damage to the upper die seat. Summary of the Invention

[0005] The purpose of the present invention is to provide a forming device for metal parts to solve the problems existing in the prior art.

[0006] The object of the present invention is achieved in this way: a forming device for metal parts, comprising:

[0007] A driving slider driven by a crank drive mechanism to slide up and down in a guide groove in the frame;

[0008] A core column fixedly connected to the lower side of the driving slider and slidingly passing through the upper die seat, wherein the lower end of the core column is detachably fixedly connected to the die head of the overall rotating body structure;

[0009] A die mounted on the lower die base that cooperates with the die head for stamping and forming;

[0010] An impact buffer mechanism located above the upper die base;

[0011] Wherein, the impact buffering mechanism comprises:

[0012] An adjustable nut, wherein the portion of the core column located above the upper die seat is provided with an adjustable threaded section, and the adjustable nut is sleeved with the adjustable threaded section;

[0013] A buffer sleeve is slidably sleeved on the core column, and when the driving slider moves downward to the limit position, the buffer sleeve contacts the upper die seat;

[0014] A buffer spring is connected to the adjustable nut and the buffer sleeve, and the buffer spring is sleeved on the core column.

[0015] Furthermore, the lower end of the core column is integrally connected to a coaxial butt joint end seat of a rotating body structure, and a cylindrical middle protrusion coaxial with the core column is provided at the center of the lower end of the butt joint end seat, and the outer peripheral wall of the middle protrusion is provided with an external thread. The die head is provided with a circular sleeve-shaped locking sleeve, and the inner hole of the locking sleeve is provided with a screw hole, and the lower end of the inner hole of the locking sleeve is provided with a radial protrusion protruding radially.

[0016] The upper portion of the outer side wall of the die head is provided with a radially protruding upper flange;

[0017] When locking the die head, the die head is entirely fitted with a locking sleeve. Driven by the axial locking force generated when the locking sleeve is threadedly engaged with the middle protrusion, the radial protrusion of the locking sleeve presses upward against the upper flange of the die head, so that the upper end face of the die head presses against the lower end face of the middle protrusion.

[0018] Furthermore, the upper end surface of the radial protrusion is an inner conical surface with its large end facing upward, the lower end surface of the upper flange is set as a conical surface, and the inner conical surface of the radial protrusion contacts the conical surface of the upper flange upward.

[0019] Furthermore, a circular positioning groove is provided at the lower end of the docking end seat, and the middle protrusion is coaxially arranged in the positioning groove. When the locking sleeve is in the locked position, the upper end surface of the locking sleeve abuts against the bottom surface of the positioning groove.

[0020] Furthermore, the junction between the upper end surface of the locking sleeve and its side wall is set as an outer chamfered surface, and the inner side wall of the positioning groove is set as a conical surface and fits with the outer chamfered surface.

[0021] Furthermore, a guide sleeve is fixedly inserted into the positioning hole of the upper die seat through which the core column passes, and the core column passes through the inner hole of the guide sleeve and is slidably matched with the inner hole of the guide sleeve.

[0022] Furthermore, the lower end surface of the buffer sleeve is provided with a circle of annular groove for giving way, the annular groove for giving way is connected to the inner hole of the buffer sleeve, and the guide sleeve partially protrudes from the upper surface of the upper die base; when the driving slider moves down to the extreme position, the annular groove for giving way of the buffer sleeve slides onto the part of the guide sleeve that protrudes from the upper surface of the upper die base, and a gap is left between the upper end surface of the guide sleeve and the bottom surface of the annular groove for giving way.

[0023] The beneficial effects of the present invention are:

[0024] 1. Due to the impact buffer mechanism, when the driving slider moves downward, the buffer spring is used to buffer the impact on the upper die base, avoiding the phenomenon of hard collision causing damage to the upper die base, further improving the reliability of the device;

[0025] 2. The reliability of the installation structure of the die head is enhanced. When the die head punches downward, the upward reaction force exerted on the die head directly acts on the lower end surface of the middle raised part of the docking end seat. The core column and the driving slider are used to withstand the upward reaction force exerted on the die head. Therefore, the threaded fitting between the locking sleeve and the middle raised part will not be directly affected by the above reaction force to avoid damage to the thread. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is the general assembly drawing of the present invention.

[0027] Figure 2 yes Figure 1 Enlarged view of part A in . DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-2 The present invention is further described with reference to the accompanying drawings and specific examples.

[0029] like Figure 1 As shown, a forming device for metal parts includes:

[0030] A driving slider 2 is driven by a crank driving mechanism 1 to slide up and down in a guide slot 3 in the frame;

[0031] A core column 4 is fixedly connected to the lower side of the driving slider 2 and is lifted and slidably passed through the upper die base 13. The lower end of the core column 4 is detachably fixedly connected to the die head 9;

[0032] A die 10 mounted on the lower die base 11 and cooperating with the die head 9 for stamping;

[0033] An impact buffer mechanism is located above the upper die base 13 .

[0034] Wherein, the impact buffering mechanism comprises:

[0035] An adjustable nut 402, a portion of the core column 4 located above the upper die base 13 is provided with an adjustable threaded section 401, and the adjustable nut 402 is fitted over the adjustable threaded section 401;

[0036] The buffer sleeve 6 is slidably mounted on the core column 4, and when the driving slider 2 moves downward to the limit position, the buffer sleeve 6 contacts the upper die base 13. The height position of the buffer sleeve 6 can be fine-tuned by turning the adjustable nut 402;

[0037] The buffer spring 5 connects the adjustable nut 402 and the buffer sleeve 6 , and the buffer spring 5 is sleeved on the core column 4 .

[0038] In this embodiment, the upper die base 13 is fixedly connected to the lower die base 11 via a connecting member 12 (stud).

[0039] like Figure 1 、2 As shown, the lower end of the core column 4 is integrally connected to a coaxial butt joint end seat 403 of a rotating body structure. A cylindrical middle protrusion 403b coaxial with the core column 4 is protruded downward from the center of the lower end of the butt joint end seat 403. The outer peripheral wall of the middle protrusion 403b is provided with an external thread. The die head 9 is equipped with a circular sleeve-shaped locking sleeve 8. The inner hole of the locking sleeve 8 is provided with a threaded hole. The lower end of the inner hole of the locking sleeve 8 is provided with a radial protrusion 801 protruding radially.

[0040] The upper portion of the outer side wall of the punch head 9 is provided with a radially protruding upper flange 9a;

[0041] When locking the die head 9, the die head 9 is entirely fitted with the locking sleeve 8. Driven by the axial locking force generated when the locking sleeve 8 is threadedly engaged with the middle protrusion 403b, the radial protrusion 801 of the locking sleeve 8 presses upward against the upper flange 9a of the die head 9, so that the upper end face of the die head 9 presses against the lower end face of the middle protrusion 403b.

[0042] When the die head 9 punches downward, the upward reaction force exerted on the die head 9 directly acts on the lower end surface of the middle raised portion 403b of the docking end seat 403. The core column 4 and the driving slider 2 are used to withstand the upward reaction force exerted on the die head 9. Therefore, the threaded fitting between the locking sleeve 8 and the middle raised portion 403b will not be directly affected by the above-mentioned reaction force, so as to avoid damage to the thread.

[0043] To facilitate positioning, the upper end surface of the radial protrusion 801 is an inner conical surface 801a with its large end facing upward, and the lower end surface of the upper flange 9a is set as a conical surface. The inner conical surface 801a of the radial protrusion 801 contacts the conical surface of the upper flange 9a upward.

[0044] A circular positioning groove 403a is provided at the lower end of the docking end seat 403, and a middle protrusion 403b is coaxially arranged in the positioning groove 403a. When the locking sleeve 8 is in the locked position, the upper end surface of the locking sleeve 8 abuts against the bottom surface of the positioning groove 403a, thereby achieving the purpose of locking, and the bottom surface of the positioning groove 403a can be used to withstand impact.

[0045] In order to facilitate the positioning operation of the locking sleeve 8, the junction between the upper end surface of the locking sleeve 8 and its side wall is set as an outer chamfered surface 802, and the inner side wall of the positioning groove 403a is set as a conical surface and fits together with the outer chamfered surface 802.

[0046] A guide sleeve 7 is fixedly inserted into the positioning hole of the upper die base 13 through which the core column 4 passes. The core column 4 passes through the inner hole of the guide sleeve 7 and is slidably engaged with the inner hole of the guide sleeve 7 .

[0047] The lower end surface of the above-mentioned buffer sleeve 6 is provided with a circle of annular groove 6a for giving way, which is connected to the inner hole of the buffer sleeve 6, and the guide sleeve 7 partially exceeds the upper surface of the upper die base 13; when the driving slider 2 moves down to the extreme position, the annular groove 6a of the buffer sleeve 6 slides onto the part of the guide sleeve 7 that exceeds the upper surface of the upper die base 13, and a gap is left between the upper end surface of the guide sleeve 7 and the bottom surface of the annular groove 6a for giving way to prevent the buffer sleeve 6 from directly impacting the guide sleeve 7 when it hits the upper die base 13.

[0048] In this embodiment, the output stroke of the drive component is monitored (the molding device is equipped with an output stroke monitoring module connected to the control system) to determine whether the drive slider 2 has moved too far. Generally, downward movement is set as a positive value. If the drive slider 2 moves downward and enters the preset warning position range, the control panel will often quickly display a warning signal to alert the operator. If the drive slider 2 moves downward and exceeds the warning position range, according to the system's preset program, the crank drive mechanism will immediately pause and issue an alarm signal. The contact between the buffer sleeve 6 and the upper mold base 13 is the last safety measure, which uses a purely mechanical method to limit the lower limit movement position of the drive slider 2. The provision of the buffer spring 5 can reduce the mechanical impact on the upper mold base 13.

[0049] The above are preferred embodiments of the present invention. Those skilled in the art may make various changes or improvements based on the above. Without departing from the overall concept of the present invention, these changes or improvements should fall within the scope of protection required by the present invention.

Claims

1. A forming device for metal parts, comprising: A driving slider (2) is driven by a crank driving mechanism (1) to slide up and down in a guide groove (3) in the frame; A core column (4) is fixedly connected to the lower side of the driving slider (2) and is lifted and slidably passed through the upper die seat (13), wherein the lower end of the core column (4) is detachably fixedly connected to a die head (9) having an integral rotating body structure; A female die (10) mounted on a lower die base (11) and cooperating with a die head (9) for stamping and forming; It is characterized in that it also includes an impact buffer mechanism located on the upper die seat (13); The impact buffering mechanism comprises: An adjustable nut (402), wherein the portion of the core column (4) located above the upper die seat (13) is provided with an adjustable threaded section (401), and the adjustable nut (402) is sleeved with the adjustable threaded section (401); A buffer sleeve (6), wherein the buffer sleeve (6) is slidably sleeved on the core column (4), and when the driving slider (2) moves downward to the limit position, the buffer sleeve (6) contacts the upper die seat (13); A buffer spring (5) connecting the adjustable nut (402) and the buffer sleeve (6), wherein the buffer spring (5) is sleeved on the core column (4); The lower end of the core column (4) is integrally connected to a coaxial butt end seat (403) of a rotating body structure, the lower end of the butt end seat (403) is provided with a cylindrical middle protrusion (403b) coaxial with the core column (4) protruding downward from the center, the outer peripheral wall of the middle protrusion (403b) is provided with an external thread, the die head (9) is provided with a circular sleeve-shaped locking sleeve (8), the inner hole of the locking sleeve (8) is provided with a screw hole, and the lower end of the inner hole of the locking sleeve (8) is provided with a radial protrusion (801) protruding radially; The upper portion of the outer side wall of the die head (9) is provided with a radially protruding upper flange (9a); When the die head (9) is locked, the die head (9) is integrally fitted with the locking sleeve (8), and driven by the axial locking force generated when the locking sleeve (8) and the middle raised portion (403b) are threaded together, the radial protrusion (801) of the locking sleeve (8) presses upward against the upper flange (9a) of the die head (9), so that the upper end face of the die head (9) presses against the lower end face of the middle raised portion (403b); A guide sleeve (7) is fixedly inserted into the positioning hole of the upper die seat (13) through which the core column (4) passes. The core column (4) passes through the inner hole of the guide sleeve (7) and is slidably fitted with the inner hole of the guide sleeve (7).

2. A metal parts forming device according to claim 1, characterized in that: The upper end surface of the radial protrusion (801) is an inner conical surface (801a) with its large end facing upward, and the lower end surface of the upper flange (9a) is set as a conical surface. The inner conical surface (801a) of the radial protrusion (801) contacts the conical surface of the upper flange (9a) upward.

3. The metal parts forming device according to claim 1, characterized in that: A circular positioning groove (403a) is provided at the lower end of the docking end seat (403), and the middle protrusion (403b) is coaxially arranged in the positioning groove (403a). When the locking sleeve (8) is in the locked position, the upper end surface of the locking sleeve (8) abuts against the bottom surface of the positioning groove (403a).

4. A metal parts forming device according to claim 3, characterized in that: The junction between the upper end surface of the locking sleeve (8) and its side wall is set as an outer chamfered surface (802), and the inner side wall of the positioning groove (403a) is set as a conical surface and fits with the outer chamfered surface (802).

5. The metal parts forming device according to claim 1, characterized in that: The lower end surface of the buffer sleeve (6) is provided with a circle of annular groove (6a) for giving way, the annular groove (6a) for giving way is connected to the inner hole of the buffer sleeve (6), and the guide sleeve (7) partially exceeds the upper surface of the upper die seat (13); when the driving slider (2) moves downward to the extreme position, the annular groove (6a) of the buffer sleeve (6) slides onto the part of the guide sleeve (7) that exceeds the upper surface of the upper die seat (13), and a gap is left between the upper end surface of the guide sleeve (7) and the bottom surface of the annular groove (6a).

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