CN114131996B - Small-size left and right half mould compound locking mechanism - Google Patents

Abstract

The invention discloses a small left and right half mold closing and locking mechanism, which comprises the following components: the device comprises a left half die, a right half die, a finger cylinder, a V-shaped block, a guide sliding block, a double-column cylinder, a substrate, a first screw, a second screw, a guide rod, a third screw, a fourth screw, a fifth screw and a sixth screw; the double-column cylinder is fixed on the base plate through a fifth screw; one end of the guide sliding block is connected with the piston of the double-column cylinder, and the other end of the guide sliding block is connected with the V-shaped block through a sixth screw; the left half die is arranged on a left sliding block of the finger cylinder through a first screw, and the right half die is arranged on a right sliding block of the finger cylinder through a second screw; the finger cylinder is fixed on the base plate through a third screw. The invention has the advantages of small volume, small clamping force, large locking force and high action speed.

Description

A small left and right half mold clamping and locking mechanism

Technical field

The invention belongs to the technical field of left and right half mold clamping, and in particular relates to a small left and right half mold clamping and locking mechanism.

Background technique

Many equipment require the use of combined molds, and combined molds require mold closing and locking mechanisms. Mold clamping and locking systems mostly use bolts, hydraulic systems, motor screw systems, large-size cylinders, etc. as power sources.

For example, the patented CN203418676U rotational mold closing and locking device installs bolts and nuts on the two halves of the mold respectively. After the mold is closed, the bolts are tightened with an electric or pneumatic screwdriver. Before opening the mold, the bolts need to be loosened with an electric or pneumatic screwdriver. This mechanism is not convenient for automatic continuous operation of the equipment.

Patented CN202427843U mold closing and locking device. After the upper and lower molds are closed, multiple "I"-shaped tie rods are installed into the mold slot to lock the mold. The "I"-shaped tie rod of this mechanism is easy to wear and get stuck, which is not conducive to automated continuous operation, and is prone to large mold clearance problems after the "I"-shaped tie rod is worn.

Patented CN2561536Y internal high-pressure forming mold locking mechanism. After the mold is closed by one oil cylinder, another oil cylinder pulls the column against the mold to achieve locking. This mechanism requires the use of a hydraulic system, which is large in size, high in cost, slow in movement, and prone to oil leakage.

The hydraulic system is large in size, has a large mold clamping force, is high in cost, has a slow movement speed, and is prone to oil leakage; the motor screw system is large in size, has a slow movement speed, has a large mold clamping force, and is high in cost; the large size cylinder is large in volume and has a large mold clamping force. , The movement speed is slow. These systems are not suitable for applications that require small equipment size, small mold clamping force (safety to prevent pinching), fast movement speed, and low cost.

Contents of the invention

The technical problem solved by the present invention is to overcome the shortcomings of the existing technology and provide a small left and right half-mold clamping and locking mechanism, which has the characteristics of small size, small clamping force (safety and anti-clamping), large locking force, and action The advantages of fast speed and low cost.

The object of the present invention is achieved through the following technical solution: a small left and right half mold clamping and locking mechanism, including: a left half mold, a right half mold, a finger cylinder, a V-shaped block, a guide slider, a double-column cylinder, a base plate, a third A screw, a second screw, a guide rod, a third screw, a fourth screw, a fifth screw and a sixth screw; wherein the double-column cylinder is fixed on the base plate through a fifth screw; the guide slider One end is connected to the piston of the double-column cylinder, and the other end of the guide slider is connected to the V-shaped block through a sixth screw; the left half mold is connected to the left sliding block of the finger cylinder through a first screw. on the right sliding block of the finger cylinder through a second screw; the finger cylinder is fixed on the base plate through a third screw; when the left half mold and the right half mold are closed, the V-shaped block The grooves are created to catch the protrusions on the left half mold and the protrusions on the right half mold.

The above-mentioned small left and right half-mold clamping and locking mechanism also includes: a control system; wherein the control system controls the air flow direction of the compressed air flowing into the double-column cylinder to extend or retract the piston of the double-column cylinder to achieve control V-shaped block extension and retraction action.

In the above-mentioned small left and right half-mold clamping and locking mechanism, the control system can adjust the movement speed and thrust of the V-shaped block by adjusting the flow rate and pressure of the compressed air flowing into the double-column cylinder.

In the above-mentioned small left and right half mold clamping and locking mechanisms, the control system controls the air flow direction of the compressed air flowing into the finger cylinder to open or close the two slide blocks of the finger cylinder, thereby controlling the opening of the left and right half molds. Mold and mold clamping action.

In the above-mentioned small left and right half mold closing and locking mechanism, the control system can adjust the speed and clamping force of the left and right half molds by adjusting the flow rate and pressure of the compressed air flowing into the finger cylinder.

In the above-mentioned small left and right half mold clamping mechanism, the groove opened by the V-shaped block, that is, the angle between the working surfaces is α. According to the sliding friction coefficient between the V-shaped block and the left and right half mold materials, the left and right half molds are calculated. The maximum self-locking angle of the two half-molds, α is twice the maximum self-locking angle of the left and right half-molds.

In the above-mentioned small left and right half mold clamping and locking mechanisms, when the left and right half molds are closed and the V-shaped block is stuck on the left and right half molds, the contact parts of the V-shaped block and the left and right half molds are at the maximum automatic position. locking angle; in this stressed state, since the V-shaped block and the left and right half molds are in a self-locking state, the left and right half molds exert any extrusion force on the V-shaped block, and the V-shaped block will not return It can ensure that the V-shaped block reliably locks the left and right half molds; because the left and right half molds and the V-shaped block are at the maximum self-locking angle, the V-shaped block will not get stuck in the left and right half molds. It cannot be retracted to achieve work continuity.

Compared with the prior art, the present invention has the following beneficial effects:

(1) The mechanism of the present invention is small in size and can realize miniaturization of the equipment; using two cylinders as the power system greatly reduces the cost and facilitates the automation of the equipment;

(2) The mechanism of the present invention moves quickly, which is beneficial to improving the working efficiency of the overall equipment;

(3) The mechanism of the present invention has small mold clamping force, good intrinsic safety, low requirements on the control system and protection system, and is convenient for reducing costs and improving equipment working efficiency.

Description of the drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are for the purpose of illustrating preferred embodiments only and are not to be construed as limiting the invention. Also throughout the drawings, the same reference characters are used to designate the same components. In the attached picture:

Figure 1 is a schematic diagram of the mechanism of the present invention;

Figure 2 is a V-shaped block structure diagram;

Figure 3 shows the structure diagram of the left and right half molds;

Figure 4 is a state diagram when the V-shaped block locks the left and right half molds;

Figure 5 is a schematic diagram of the stress state of the left half mold and the right half mold.

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that a thorough understanding of the disclosure will be provided, and the scope of the disclosure will be fully conveyed to those skilled in the art. It should be noted that, as long as there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

Figure 1 is a schematic diagram of the mechanism of the present invention. As shown in Figure 1, the small left and right half mold clamping and locking mechanism includes: left half mold 110, right half mold 120, finger cylinder 2, V-shaped block 3, guide slider 4, double column cylinder 5, base plate 6, The first screw 7 , the second screw 8 , the guide rod 9 , the third screw 10 , the fourth screw 11 , the fifth screw 12 and the sixth screw 13 ; wherein, the double-column cylinder 5 is fixed by the fifth screw 12 . On the base plate 6; one end of the guide slider 4 is connected to the piston of the double-column cylinder 5, and the other end of the guide slider 4 is connected to the V-shaped block 3 through a sixth screw 13; The left half mold 110 passes through the first screw 7 and the left sliding block of the finger cylinder 2, and the right half mold 120 passes through the second screw 8 and the right sliding block of the finger cylinder 2; the finger cylinder 2 passes through The third screw 10 is fixed on the base plate 6; when the left half mold and the right half mold are closed, the grooves opened in the V-shaped block 3 catch the convex portions on the left half mold and the convex portions on the right half mold.

The double-column cylinder 5 is fixed on the base plate 6 through the fifth screw 12 . One end of the guide slider 4 is connected to the piston of the double-column cylinder 5 . The other end of the guide slider 4 is fixed to the V-shaped block 3 through the sixth screw 13 . The control system controls the airflow direction of the compressed air flowing into the double-column cylinder to extend or retract the piston of the double-column cylinder, thereby controlling the extension and retraction of the V-shaped block. By adjusting the flow rate and pressure of the compressed air flowing into the double-column cylinder, the movement speed and thrust of the V-shaped block (double-column cylinder piston) can be adjusted.

The left and right half molds 1 are fixed on the two sliding blocks of the finger cylinder 2 through the first screw 7 and the second screw 8 , and the finger cylinder 2 is fixed on the base plate 6 through the third screw 10 . The control system controls the direction of the air flow into the finger cylinder to open or close the two slide blocks of the finger cylinder, thereby controlling the opening and closing of the left and right half molds. By adjusting the flow rate and pressure of the compressed air flowing into the finger cylinder, the mold closing speed and clamping force of the left and right half molds (finger cylinder sliders) can be adjusted.

As shown in Figures 2 and 4, the angle between the working surfaces of the V-shaped block is α. According to the sliding friction coefficient of the V-shaped block and the left and right half mold materials, the maximum self-locking angle of the two is calculated, and α is twice the maximum self-locking angle of the two. When the left and right mold halves are closed and the V-shaped block is stuck on the left and right mold halves (as shown in Figure 3), the contact parts of the V-shaped block and the left and right mold halves are at the maximum self-locking angle. Under this stress state, since the V-shaped block is in a self-locking state with the left and right half molds, the left and right half molds exert any extrusion force on the V-shaped block, and the V-shaped block will not retreat, ensuring that the V-shaped block Reliable locking of left and right mold halves. At the same time, because the two are at the maximum self-locking angle, the V-shaped block will not get stuck on the left and right half molds and cannot be retracted, achieving work continuity.

The working principle and workflow of the organization:

1) Initial state of the mechanism: The V-shaped block (double-column cylinder piston) retracts, and the left and right half molds (finger cylinder sliders) open.

2) The left and right half molds are closed: the V-shaped block (double-column cylinder piston) remains in the retracted state, and the left and right half molds (finger cylinder sliders) are closed.

3) Locking of the left and right half molds: The V-shaped block (double-column cylinder piston) extends, the V-shaped block locks the left and right half-molds, and the left and right half-molds (finger cylinder sliders) remain closed.

4) Open the left and right half molds: the V-shaped block (double-column cylinder piston) retracts. After the V-shaped block is unlocked, the left and right half-molds (finger cylinder sliders) open, and the mechanism returns to the initial state.

The stress states of the left half mold and the right half mold are symmetrical, and the stress analysis is performed on the right half mold. The stress state of the right half of the mold is shown in Figure 5. Among them, N is the extrusion force of the V-shaped block on the right half of the mold, and the force direction is perpendicular to the V-shaped groove slope of the V-shaped block; N1 is the extrusion force of the left half of the mold on the right half of the mold, and the force direction is perpendicular to The interface between the left half mold and the right half mold; f is the friction force of the V-shaped groove of the V-shaped block facing the right half-mold, and the force direction is parallel to the V-shaped surface of the V-shaped groove.

If the forces on the right half of the mold are balanced, we can get:

In the N direction: N=N1·cos(α/2)

In the f direction, the condition that the right half mold will not automatically slide toward the big end of the V-shaped groove is (μ is the sliding friction coefficient):

f＝μ·N≥N1·sin(α/2)

→μ·N1·cos(α/2)≥N1·sin(α/2)

→μ·cos(α/2)≥sin(α/2)

→μ·≥sin(α/2)÷cos(α/2)＝tan(α/2)

→μ≥tan(α/2)

→Arctanμ≥α/2

→α≤2Arctanμ

When α≤2Arctanμ, the right half mold is in a self-locking state and will not slide toward the large end of the V-shaped groove of the V-shaped block;

When α>2Arctanμ, when the right half mold is squeezed by the left half mold, the component force in the opposite direction f is greater than the maximum sliding friction force. When the right half mold is squeezed by the left half mold, the component force in the opposite direction f is greater than the sliding friction force. When the difference in the maximum friction force is greater than the thrust of the double-column cylinder, the right half mold will slide toward the large end of the V-shaped groove of the V-shaped block (the left and right half molds are accidentally unlocked); when α=2Arctanμ, the right half mold is squeezed by the left half mold The component of pressure in the opposite direction of f is equal to the sliding friction force. No matter how big or small the extrusion force of the right half mold is from the left half mold, the right half mold will not slide in the V-shaped groove, and the V-shaped block can be reliably locked. The left and right half molds can be easily retracted to unlock (not stuck and unable to be pulled back).

The mechanism of the present invention is small in size and can realize miniaturization of equipment; two cylinders are used as the power system, which greatly reduces the cost and facilitates the automation of the equipment; the mechanism of the present invention moves quickly and is conducive to improving the working efficiency of the overall equipment; the mechanism of the present invention is mold-closing The clamping force is small, the intrinsic safety is good, and the requirements for the control system and protection system are low, which is convenient for reducing costs and improving equipment work efficiency.

Although the present invention has been disclosed above in terms of preferred embodiments, they are not intended to limit the present invention. Any person skilled in the art can utilize the methods and technical contents disclosed above to improve the present invention without departing from the spirit and scope of the present invention. Possible changes and modifications are made to the technical solution. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention, all belong to the technical solution of the present invention. protected range.

Claims (6)

1. A small left and right mold half mold closing and locking mechanism, which is characterized by comprising: the device comprises a left half die (110), a right half die (120), a finger cylinder (2), a V-shaped block (3), a guide sliding block (4), a double-column cylinder (5), a base plate (6), a first screw (7), a second screw (8), a guide rod (9), a third screw (10), a fourth screw (11), a fifth screw (12) and a sixth screw (13); wherein,

the double-column air cylinder (5) is fixed on the base plate (6) through a fifth screw (12);

one end of the guide sliding block (4) is connected with a piston of the double-column cylinder (5), and the other end of the guide sliding block (4) is connected with the V-shaped block (3) through a sixth screw (13);

the left half die (110) is connected with the left sliding block of the finger cylinder (2) through a first screw (7), and the right half die (120) is connected with the right sliding block of the finger cylinder (2) through a second screw (8);

the finger cylinder (2) is fixed on the base plate (6) through a third screw (10);

when the left half die and the right half die are clamped, the groove formed in the V-shaped block (3) clamps the protruding part on the left half die and the protruding part on the right half die;

when the left half die and the right half die are clamped, the V-shaped block is clamped on the left half die and the right half die, and the contact part of the V-shaped block and the left half die and the right half die is at the maximum self-locking angle; under the stress state, as the V-shaped block, the left half die and the right half die are in a self-locking state, the left half die and the right half die apply any extrusion force to the V-shaped block, the V-shaped block cannot fall back, and the V-shaped block can be reliably locked to the left half die and the right half die; because the left half mould, the right half mould and the V-shaped block are at the maximum self-locking angle, the V-shaped block cannot be clamped on the left half mould and the right half mould and cannot retract, and work continuity is achieved.

2. The small left and right mold half mold closing and locking mechanism according to claim 1, further comprising: a control system; the control system controls the air flow direction of compressed air which is introduced into the double-column air cylinder (5) to realize the extension or retraction of the piston of the double-column air cylinder (5), and controls the extension and retraction actions of the V-shaped block (3).

3. The small left and right mold half mold closing and locking mechanism according to claim 2, wherein: the control system can adjust the movement speed and the thrust of the V-shaped block by adjusting the flow rate and the pressure of compressed air fed into the double-column cylinder.

4. The small left and right mold half mold closing and locking mechanism according to claim 2, wherein: the control system controls the air flow direction of compressed air which is introduced into the finger air cylinder (2) to realize the opening or closing of the two sliding blocks of the finger air cylinder (2) and realize the control of the opening and closing actions of the left half die and the right half die.

5. The small left and right mold half mold closing and locking mechanism according to claim 2, wherein: the control system can adjust the speed and the clamping force of the left half die and the right half die for clamping by adjusting the flow rate and the pressure of compressed air which is introduced into the finger cylinder (2).

6. The small left and right mold half mold closing and locking mechanism according to claim 1, wherein: the included angle of the working surface, namely the groove formed by the V-shaped block (3), is alpha, and the maximum self-locking angle of the left half die and the right half die is calculated according to the sliding friction coefficient of the V-shaped block, the left half die and the right half die, wherein alpha is 2 times of the maximum self-locking angle of the left half die and the right half die.