Protection mechanism for reducing return stroke friction force of slotting tool of mechanism

Abstract

The utility model discloses a protection mechanism for reducing the return stroke friction force of a slotting tool of a mechanism. The protection mechanism comprises a sliding block end shaft seat, a first-stage connecting rod, a second-stage connecting rod, a fixed end shaft seat, an elastic lifting pin, a first nitrogen cylinder and a connecting shaft, wherein the fixed end shaft seat is fixedly connected with the lower die body, one end of the fixed end shaft seat is hinged to one end of the second-stage connecting rod, the other end of the second-stage connecting rod is hinged to one end of the first-stage connecting rod, the other end of the first-stage connecting rod is hinged to one end of the sliding block end shaft seat, and the sliding block end shaft seat is connected with the pulley mechanism and moves in the horizontal direction; the lower dead center position of the protection mechanism is 0.5 mm below the horizontal line of the central shaft, and the first-stage connecting rod and the second-stage connecting rod form an included angle of a preset angle at the upper dead center position; the elastic lifting pin is installed on the lower die base, and the advanced nitrogen cylinder is installed on the floating slotting tool and moves along with the floating slotting tool. The problems that the slotting tool of the mechanism is abraded and the floating slotting tool is blocked in the return stroke can be effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to punch die technical field, concretely relates to a protection mechanism for reducing mechanism insert knife return friction. BACKGROUND

[0002] Insert knife structure is often applied to automobile covering piece punch die, and is used for improving production line production efficiency, however, when actually using, due to space, part characteristic and stroke relation limit, insert knife sliding fit face normal pressure is often too large, sliding fit friction is too large, and the following problems occur further: (1) integral insert knife guide plate wears seriously, (2) floating insert knife is stuck and cannot normally return, and after delay return, acceleration is too large, and large noise is caused even to break return block. SUMMARY

[0003] In view of the technical problems in the above background art, the utility model aims at providing a protection mechanism for reducing mechanism insert knife return friction.

[0004] In order to realize the utility model's purpose, the utility model provides the following technical scheme:

[0005] A protection mechanism for reducing mechanism insert knife return friction, including slider end axle seat, primary connecting rod and secondary connecting rod, fixed end axle seat, elastic top pin, first nitrogen cylinder, connecting shaft;

[0006] Wherein, the fixed end axle seat is connected and fixed with the lower die body, one end thereof is hingedly connected with one end of the secondary connecting rod, the other end of the secondary connecting rod is hingedly connected with one end of the primary connecting rod, the other end of the primary connecting rod is hingedly connected with one end of the slider end axle seat, the slider end axle seat is connected with the trolley mechanism, and the horizontal direction movement thereof is realized;The lower dead point position of the protection mechanism is 0.5mm below the central shaft horizontal line, and the primary connecting rod and the secondary connecting rod form a preset angle when the upper dead point position is reached;The elastic top pin is installed on the lower die seat, and the first nitrogen cylinder is installed on the floating insert knife and moves with the floating insert knife.

[0007] Wherein, the secondary connecting rod is an I-shaped type.

[0008] Wherein, the fixed end axle seat and the secondary connecting rod, the secondary connecting rod and the primary connecting rod, and the primary connecting rod and the slider end axle seat are connected through the connecting shaft respectively, and the secondary connecting rod and the primary connecting rod can rotate around the respective connecting shaft.

[0009] Compared with the prior art, the utility model has the beneficial effects that:

[0010] (1) the problems of mechanism insert knife wear and tear and floating insert knife return jamming can be effectively solved.

[0011] (2) This mechanism is an independent mechanism attached to the existing wedge mechanism. It is easy to install and maintain, and the parts are easy to process and purchase. It does not damage the existing wedge mechanism.

[0012] (3) The proposed solution has been verified by a large number of simulation analyses, and its motion stability, structural strength and lifespan can meet the requirements for mass production of molds. Attached Figure Description

[0013] Fig. 1 This is a schematic diagram of the state at the bottom dead center in an embodiment of this application;

[0014] Fig. 2 This is a schematic diagram of the state at the top dead center in an embodiment of this application;

[0015] In the diagram, 1-slider end bearing, 2-first-stage connecting rod, 3-second-stage connecting rod, 4-fixed end bearing, 5-elastic top pin, 6-preceding nitrogen cylinder, 7-connecting shaft. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0018] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0019] like Figs. 1-2 The diagram shows the structure of an embodiment of this application.

[0020] The embodiment provides a protection mechanism for reducing the back stroke friction of a mechanism insert, which comprises a slider end shaft seat 1, a first connecting rod 2 and a second connecting rod 3, a fixed end shaft seat 4, an elastic top pin 5, a leading nitrogen cylinder 6, a connecting shaft 7, and the like.

[0021] The fixed end shaft seat 4 is connected with a lower die body and is hingedly connected with one end of the second connecting rod 3, the other end of the second connecting rod 3 is hingedly connected with one end of the first connecting rod 2, the other end of the first connecting rod 2 is hingedly connected with one end of the slider end shaft seat 1, the slider end shaft seat 1 is connected with a trolley mechanism and moves horizontally, the lower dead point position of the protection mechanism is 0.5mm below the horizontal line of the central shaft, the upper dead point position is the angle between the first connecting rod and the second connecting rod at a preset angle, the elastic top pin 5 is installed on a lower die seat, and the leading nitrogen cylinder 6 is installed on a floating insert and moves with the floating insert.

[0022] Preferably, the second connecting rod 3 is an I-shaped type.

[0023] Preferably, the fixed end shaft seat 4, the second connecting rod 3, the first connecting rod 2 and the slider end shaft seat 1 are connected through the connecting shaft 7 respectively, and the second connecting rod 3 and the first connecting rod 2 can rotate around the respective connecting shaft 7.

[0024] It should be noted that when in the lower dead point state, the connecting rod has a small negative angle, mainly bears the axial pressure, and is normally locked to avoid system instability. The connecting rod expands the slider, so that there is a 0.1mm gap between the wedge guide plates, and the supporting force of the mechanism is borne by the connecting rod instead of the wedge guide plate, so that the insert can be smoothly back-stroked without friction in the normal direction.

[0025] During the back stroke of the insert, after the pressure core stroke is completed, the leading nitrogen cylinder stroke is released, the elastic top pin below the connecting rod starts to release, pushes the connecting rod shaft point to move upward, and after moving 0.5mm beyond the locking point, the self-locking of the connecting rod is released, and the mechanism can be normally released. At this time, the pressure of the pressure core has been unloaded, the normal pressure of the wedge guide plate does not contain the component force of the pressure, the friction is small, the required back stroke force is small, and then the normal back stroke can be realized.

[0026] The working mechanism during the clamping process is a mirror image of the open mold state.

[0027] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A protective mechanism for reducing the return friction of a cutting tool in a mechanism, characterized in that, It includes a slider end bearing (1), a first-stage connecting rod (2) and a second-stage connecting rod (3), a fixed end bearing (4), an elastic top pin (5), a pilot nitrogen cylinder (6), and a connecting shaft (7); The fixed end bearing (4) is fixedly connected to the lower mold body, one end of which is hinged to one end of the secondary connecting rod (3), the other end of the secondary connecting rod (3) is hinged to one end of the primary connecting rod (2), the other end of the primary connecting rod (2) is hinged to one end of the slider end bearing (1), the slider end bearing (1) is connected to the trolley mechanism and moves horizontally; the lower dead point of the protection mechanism is 0.5mm below the horizontal line of the central axis, and the primary connecting rod and the secondary connecting rod form a preset angle at the upper dead point; the elastic ejector pin (5) is installed on the lower mold base, and the advance nitrogen cylinder (6) is installed on the floating insert and moves with the floating insert.

2. The protective mechanism for reducing the return friction of the insert tool according to claim 1, characterized in that, The secondary connecting rod (3) is I-shaped.

3. The protective mechanism for reducing the return friction of the insert tool according to claim 1, characterized in that, The fixed end bearing (4) is connected to the secondary connecting rod (3), the secondary connecting rod (3) is connected to the primary connecting rod (2), and the primary connecting rod (2) is connected to the slider end bearing (1) via connecting shafts (7). The secondary connecting rod (3) and the primary connecting rod (2) can rotate around their respective connecting shafts (7).

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