CN202655451U - Rapid clamping mechanism for die - Google Patents

Abstract

The utility model discloses a fast clamping mechanism for a mold, which comprises an L-shaped pressing plate, a rotating shaft, bolts and nuts; wherein the L-shaped pressing plate includes a first pressing arm and a second pressing arm which intersect with each other, and the first pressing arm An opening and a limiting step are provided at the junction of the first pressing arm and the second pressing arm, and the surface of the step faces the outside of the L-shaped pressing plate. After the opening and the rotating shaft, cooperate with the nut. When the mold needs to be clamped, the rotating shaft is placed on the limit step, one end of the bolt is clamped on the worktable, and the other end passes through the rotating shaft and the opening in sequence, the mold is placed between the pressing arm and the working table, and The end of the bolt passing through the rotating shaft is tightened with a nut, so as to realize the quick clamping of the mold.

Description

Mold Quick Clamping Mechanism

technical field

The utility model relates to the technical field of mold clamping devices, in particular to a quick mold clamping mechanism.

Background technique

Modern production management, in the stamping production, is facing a transformation from a small-variety mass production method to a multi-variety and small-batch production method; the mold change process has become more critical, and optimizing the clamping method of the mold can effectively shorten the mold change time .

At present, most of the mold clamping methods are fixed by bolts and pressure plates. There are two main methods:

1. Directly fixed by bolts. Disadvantages: high requirements for mold fixed point position and dimensional accuracy (must be designed and processed according to the machine tool); poor interchangeability (especially in the case of multiple machine tools), which will lead to long mold change cycle.

2. Fix it with the pressure plate bolts. Disadvantages: It is necessary to prepare blocks of various heights, and it takes a long time to change the mold; when using multiple blocks, there are safety hazards.

Utility model content

The utility model provides a quick mold clamping mechanism aiming at the disadvantages of high precision requirements, poor interchangeability, long mold changing time and potential safety hazards when using a pair of pads in the above existing mold clamping methods.

Mold quick clamping mechanism, including L-shaped pressing plate, rotating shaft, bolts and nuts;

The L-shaped pressing plate includes a first pressing arm and a second pressing arm that intersect with each other, and an opening and a limiting step are provided at the intersection of the first pressing arm and the second pressing arm, and the step of the limiting step is Facing the outside of the L-shaped pressure plate, the rotating shaft is placed on the limit step, and the threaded part of the bolt passes through the opening and the rotating shaft, and cooperates with the nut.

After adopting the above structure, when clamping the mold, first place both ends of the rotating shaft on the limit steps, the head of the bolt clamps the workbench, and the threaded part of the bolt passes through the middle hole and opening of the rotating shaft, and then the mold is placed Between the pressing arm and the workbench, use a nut to tighten the bolt to pass through one end of the rotating shaft, so as to realize the quick clamping of the mold.

The corner of the L-shaped pressing plate described in the utility model forms two angles, the side less than 180° is defined as the inner side of the L-shaped pressing plate, and the side greater than 180° is defined as the outside of the L-shaped pressing plate.

The limiting step is located on the top surface of the intersection of the first pressing arm and the second pressing arm or on the inner wall of the opening.

The contact surface between the limiting step and the rotating shaft is an arc surface. When in use, for molds with different thicknesses, the contact point between the rotating shaft and the limiting step will change accordingly, and the stress of each component will be adjusted so that each component Even by force.

The limiting steps are set as two groups, which are respectively located on the first pressing arm and the second pressing arm, and each group of limiting steps includes two limiting steps, and the two limiting steps are respectively located on the On the opposite sides of the inner wall of the opening, the limit steps set in this way can flexibly adjust the position of the rotation axis to achieve a better clamping effect when clamping molds with different thicknesses.

The L-shaped pressing plate has an integrated structure, which improves the overall strength of the L-shaped pressing plate and is convenient for processing.

The length of the first pressing arm is greater than the length of the second pressing arm. When the two pressing arms are not equal in length, they can be used in reverse, that is, the positions of the first pressing arm and the second pressing arm are interchanged within a certain range. The clamping thickness can be adjusted.

The end of the L-shaped pressing plate is provided with an anti-slip protrusion, which is located at the end of the L-shaped pressing plate in contact with the mold and the workbench to increase the friction between the mold and the workbench, thereby stabilizing, Anti-slip effect.

The anti-slip protrusions are bar-shaped protrusions arranged in parallel, and this structure enables greater friction between the end of the L-shaped platen, the mold and the worktable, and maintains the stability of the mold.

The angle formed by the first pressing arm and the second pressing arm is 90°-120°. Within this angle range, the lever theorem can be better applied, and the angle between the two is too small to facilitate clamping Mold, if the angle is too large, it will easily damage the L-shaped platen.

The angle formed by the first pressing arm and the second pressing arm is 100°.

The mold fast clamping mechanism of the utility model, when in use, with the tightening of the nut, the tightening force is transmitted to the mold through the rotating shaft and the L-shaped pressing plate, so that the L-shaped pressing plate automatically compresses the mold; the clamping mechanism adopts L The mold is fixed by the L-shaped pressing plate, which makes full use of the principle of leverage. The L-shaped pressing plate effectively combines the functions of the pressing plate and the spacer in the prior art. The utility model has the advantages of simple structure and quick operation, and can realize fast clamping of the mould.

Description of drawings

Fig. 1 is the reference diagram of the use state of the quick clamping mechanism of the mold of the present invention;

Fig. 2 is the sectional structure schematic diagram of the L-shaped pressing plate in the fast clamping mechanism of the mold of the present invention;

Fig. 3 is a reference diagram of another usage state of the mold quick clamping mechanism in Fig. 1 .

Detailed ways

Below in conjunction with accompanying drawing, illustrate embodiment of the present utility model.

The quick mold clamping mechanism of the utility model comprises an L-shaped pressing plate 1, a rotating shaft 2, bolts 3, and nuts 4.

As shown in Figures 1 and 2, the L-shaped pressing plate 1 is composed of a first pressing arm 5 and a second pressing arm 6, and the first pressing arm 5 and the second pressing arm 6 are provided with an opening 7 at the junction, and the opening 7 The inner wall of the first compression arm 5 and the second compression arm 6 are respectively provided with a first limit step 8 and a second limit step 9 connected to each other, the step surfaces of the steps are all facing the outside of the L-shaped pressure plate 1, the first Both the step surfaces of the limiting step 8 and the second limiting step 9 are arc-shaped, and bend toward the inner side of the L-shaped pressure plate 1, the rotating shaft 2 is placed on the second limiting step 9, and the threaded part of the bolt 3 runs through the opening 7 After being connected with the rotating shaft 2 and cooperating with the nut 4, the two ends of the L-shaped pressure plate 1 are provided with a first anti-slip protrusion 12A and a second anti-slip protrusion 12B.

When clamping, place both ends of the rotating shaft 2 on the second limit step 9, the middle part of the rotating shaft 2 has a radial perforation, and the upper surface of the workbench 11 is provided with a groove with an inverted T-shaped cross section , clamp the head of the bolt 3 into the inverted T-shaped groove of the workbench 11, and the other end with the thread passes through the rotating shaft 2 and the opening 7 at the opening 7 in turn, and the mold 10 is placed on the workbench 11 and the second Between the pressing arms 6, screw the nut 4 into the end of the bolt 3 passing through the rotating shaft 2. As the nut 4 is gradually tightened, the contact point between the rotating shaft 2 and the limit step surface will be adjusted so that the tightening of the nut 4 The force is transmitted on the same straight line, and all parts are evenly stressed.

For thicker molds, as shown in Figure 3, the positions of the first pressing arm 5 and the second pressing arm 6 can be exchanged, the rotating shaft 2 is placed on the first limiting step 8, and the mold 10 is placed on the second Between a pressing arm 5 and the worktable 11, the bolt 2 passes through the rotating shaft 2 and one end of the opening 7 and is tightened with a nut 4, and the tightening force is transmitted to the mold 10 through the bolt 3, the rotating shaft 2, and the L-shaped pressing plate 1, thereby realizing Clamping of the mold 10. Because the lengths of the first pressing arm 5 and the second pressing arm 6 are not equal, the adjustment of the clamping thickness within a certain range can be realized.

Claims (10)

1. a mould quick clamping mechanism is characterized in that, comprises L shaped pressing plate (1), rotating shaft (2), bolt (3), nut (4);

Wherein said L shaped pressing plate (1) comprises the first pressure arm (5) and the second pressure arm (6) that mutually crosses, the intersection of described the first pressure arm (5) and the second pressure arm (6) is provided with opening (7) and limited step, the step surface of this limited step is towards the outside of L shaped pressing plate (1), described rotating shaft (2) places on the limited step, after the threaded portion of described bolt (3) runs through described opening (7) and rotating shaft (2), match with described nut (4).

2. mould quick clamping mechanism according to claim 1 is characterized in that, described limited step is positioned at the end face of intersection of the first pressure arm (5) and the second pressure arm (6) or the inwall of described opening (7).

3. mould quick clamping mechanism according to claim 1 is characterized in that, the contact-making surface of described limited step and rotating shaft (2) is cambered surface.

4. mould quick clamping mechanism according to claim 1, it is characterized in that, described limited step is made as two groups, lay respectively on the first pressure arm (5) and the second pressure arm (6), and every group of limited step includes two limited steps, and described two limited steps lay respectively at the relative both sides of described opening (7) inwall.

5. mould quick clamping mechanism according to claim 1 is characterized in that, described L shaped pressing plate (1) is structure as a whole.

6. mould quick clamping mechanism according to claim 1 is characterized in that, the length of described the first pressure arm (5) is less than the length of the second pressure arm (6).

7. mould quick clamping mechanism according to claim 1 is characterized in that, the end of described L shaped pressing plate (1) is provided with anti-skidding projection (12).

8. mould quick clamping mechanism according to claim 7 is characterized in that, the strip bulge of described anti-skidding projection (12) for being arranged in parallel.

9. mould quick clamping mechanism according to claim 1 is characterized in that, described the first pressure arm (5) and the second pressure arm (6) angulation are 90 °～120 °.

10. mould quick clamping mechanism according to claim 9 is characterized in that, described the first pressure arm (5) and the second pressure arm (6) angulation are 100 °.

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