Punch forming die for safety catch of lifting hook

Abstract

The utility model discloses a punch forming die for a safety catch of a lifting hook. The punch forming die comprises an upper die and a lower die, the upper die is fixed to the lower side of an upper movable beam of the oil press, and the longitudinal middle of the lower side of the upper die extends downwards to form a punch which is of a trapezoidal table structure with one large end and the other small end. The lower die is fixedly supported on a lower workbench of the oil press and corresponds to the upper die in position, a lower die impression is arranged in the longitudinal middle of the top face of the lower die and is of a trapezoidal structure with one large end and the other small end in the longitudinal direction, the shape of the lower die impression is matched with that of a groove of a safety catch, and a positioning groove of a safety catch plate is formed in the upper side of the lower die. The safety catch stamping die is simple in structure and convenient to machine, a safety catch plate can be positioned through the positioning groove in the upper side of the lower die impression, positioning is accurate and reliable, positioning precision is high, meanwhile, the upper die can be reliably limited and guided through the guide columns at the two ends of the lower die impression, the stability of the stamping process can be effectively guaranteed, and therefore the machining quality of a safety catch to be formed is guaranteed. And the product forming efficiency and the product percent of pass are improved.

Description

Technical Field

[0001] The utility model relates to a stamping forming die, in particular to a stamping forming die for a safety buckle installed on a hook, belonging to the technical field of forming dies. Background Art

[0002] The hook is the most commonly used lifting device on lifting machinery. It is often suspended on the wire rope of the lifting mechanism with the help of pulleys and other components. The hook is usually equipped with a hook safety buckle, which is installed at the hook opening through a spring. Its function is to prevent the lifting wire rope from falling off the hook to avoid safety accidents. Figure 1 As shown, the hook safety catch 10 is a channel-shaped piece with one end larger than the other and two ends bent upward. It is made of 2mm thick sheet metal. During production, the shape is first formed using a slotting machine, and then stamped into shape using upper and lower dies under the pressure of a hydraulic press. Existing hook safety catches have complex upper and lower die structures, making the safety catch difficult to position during production and with poor positioning accuracy. This results in poor quality, often failing to meet drawing requirements and resulting in a high scrap rate. Utility Model Content

[0003] The utility model aims to provide a punching die for a hook safety buckle which has the advantages of simple structure, low cost and convenient processing.

[0004] The utility model is achieved through the following technical solutions:

[0005] A hook safety buckle stamping die comprises an upper die and a lower die; the upper die is fixed to the lower side of a movable beam on a hydraulic press, a punch extends downward from the longitudinal middle portion of the lower side of the upper die, and the punch is a trapezoidal table structure with one end larger than the other end; the lower die is fixedly supported on the lower workbench of the hydraulic press, the lower die corresponds to the upper die in position, a lower die chamber is provided in the longitudinal middle portion of the top surface of the lower die, the lower die chamber is a trapezoidal structure with one end larger than the other end, the shape of the lower die chamber matches the groove shape of the safety buckle, a positioning groove for a safety buckle plate is provided on the upper side of the lower die, and during stamping, the two lateral sides of the lower part of the safety buckle plate are positioned in the positioning grooves.

[0006] The purpose of the utility model can be further achieved by the following measures.

[0007] The aforementioned hook safety buckle stamping mold, wherein the two ends of the longitudinal middle part of the lower side of the upper mold are respectively provided with guide holes, and the lower ends of the guide columns are respectively fixed in the longitudinal center ends of the lower mold cavity. When the safety buckle plate is stamped and formed, the guide holes are respectively inserted into the corresponding guide columns.

[0008] The aforementioned hook safety buckle stamping mold, wherein the upper mold is provided with handles at both longitudinal ends.

[0009] In the aforementioned hook safety buckle stamping die, the single-side gap a between the punch and the lower die cavity is 0.3mm to 0.5mm larger than the thickness b of the safety buckle plate.

[0010] The utility model has the advantages of simple structure, low cost and convenient processing. The safety buckle plate can be positioned through the positioning groove on the upper side of the lower die chamber, and the positioning is accurate and reliable with high positioning precision. At the same time, the guide columns at both ends of the lower die chamber can reliably limit and guide the upper die, which can effectively ensure the stability of the stamping process, thereby ensuring the processing quality of the safety buckle and improving the product molding efficiency and product qualification rate.

[0011] Advantages and features of the present invention will be illustrated and explained through the following non-limiting description of preferred embodiments, which are given as examples only with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the three-dimensional structure of the hook safety buckle;

[0013] Figure 2 It is a structural diagram of the utility model;

[0014] Figure 3 This is a schematic diagram of the three-dimensional structure of the upper mold of the utility model;

[0015] Figure 4 This is a schematic diagram of the three-dimensional structure of the lower mold of the utility model;

[0016] Figure 5 The utility model is a structural schematic diagram of a hook safety buckle plate embedded in the lower mold of the utility model. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] like Figure 2 、 Figure 3 and Figure 4 As shown, the present invention comprises an upper die 1 and a lower die 2. The upper die 1 is a unitary structure, with its four corners fixed to the lower side of a movable beam 31 on a hydraulic press 3 by means of T-bolts 20 and nuts 30. A punch 11 extends downward from the longitudinal middle portion of the lower side of the upper die 1. The punch 11 is a trapezoidal structure with one end larger than the other. Handles 12 are provided at each longitudinal end of the upper die 1 to facilitate the transport of the upper die 1. The four corners of the lower die 2 are also fixedly supported on the lower worktable 32 of the hydraulic press 3 by means of T-bolts 20 and nuts 30. The lower die 2 corresponds to the upper die 1 in position. A lower die cavity 21 is provided in the longitudinal middle portion of the top surface of the lower die 2. The lower die cavity 21 is a trapezoidal structure with one end larger than the other. The shape of the lower die cavity 21 matches the groove shape of the safety buckle 10.

[0019] The unilateral gap a between the punch 11 and the lower die 21 is 0.3mm to 0.5mm larger than the thickness b of the safety buckle plate 101. In this embodiment, a is 0.4mm larger than b, which facilitates smooth stamping of the workpiece. The upper side of the lower die 2 is provided with a positioning groove 22 for the safety buckle plate 101. During stamping, Figure 5 The lower lateral sides of the middle safety buckle plate 101 are positioned in the positioning grooves 22. Guide holes 13 are respectively provided at both ends of the longitudinal middle portion of the lower side of the upper die 1. The lower ends of the guide posts 23 are respectively fixed at the longitudinal center ends of the lower die cavity 21. When the safety buckle plate 101 is stamped and formed, the guide holes 13 move downward and respectively fit into the corresponding guide posts 23, so that when the upper and lower dies are closed, the punch 11 accurately enters the lower die cavity 21.

[0020] like Figure 2 As shown, when installing the mold, first secure the four corners of the upper mold 1 and the four corners of the lower mold 2 to the underside of the upper movable beam 31 and the lower workbench 32 using T-bolts 20 and nuts 30, respectively. Then, slowly lower the upper mold 1 so that the guide holes 13 at both ends of the upper mold 1 fit over the corresponding guide posts 23 of the lower mold 2, completing the alignment of the upper mold 1 and the lower mold 2. Finally, tighten the nuts 30 on each T-bolt 20 to complete the installation of the upper mold 1 and the lower mold 2.

[0021] like Figure 5 As shown, when the safety buckle is stamped, the safety buckle plate 101 is first embedded in the positioning groove 22 of the lower die 21, and the lower sides of the safety buckle plate 101 are limited by the positioning groove 22. Then, the hydraulic press 3 is started, the upper die 1 moves downward and closes with the lower die 2, completing the bending forming of the safety buckle 10.

[0022] In addition to the above embodiments, the present invention may also have other implementation methods. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope required by the present invention.

Claims

1. A punching die for a hook safety buckle, characterized by: It includes an upper die and a lower die; the upper die is fixed on the lower side of the movable beam on the hydraulic press, and a punch extends downward from the longitudinal middle part of the lower side of the upper die, and the punch is a trapezoidal table structure with one end larger and the other end smaller; the lower die is fixedly supported on the lower workbench of the hydraulic press, and the positions of the lower die and the upper die correspond to each other. A lower die chamber is provided in the longitudinal middle part of the top surface of the lower die, and the lower die chamber is a trapezoidal structure with one end larger and the other end smaller. The shape of the lower die chamber matches the groove shape of the safety buckle, and a positioning groove for the safety buckle plate is provided on the upper side of the lower die. During stamping, the two lateral sides of the lower part of the safety buckle plate are positioned in the positioning groove.

2. The punching die for the hook safety buckle according to claim 1, characterized in that: Guide holes are respectively provided at both ends of the longitudinal middle portion of the lower side of the upper die, and the lower ends of the guide columns are respectively fixed in the longitudinal center ends of the lower die cavity. When the safety buckle plate is stamped and formed, the guide holes are respectively inserted into the corresponding guide columns.

3. The punching die for the hook safety buckle according to claim 1, characterized in that: The upper mold is provided with handles at both longitudinal ends.

4. The punching die for the hook safety buckle according to claim 1, characterized in that: The unilateral gap a between the punch and the lower die cavity is 0.3 mm to 0.5 mm larger than the thickness b of the safety buckle plate.

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