CN107962810A - A kind of automatic guide centering guide post - Google Patents

Abstract

The invention discloses a kind of automatic guide centering guide post, including guide post body, guide post, the guide post includes cylinder and round platform, the outside diameter of the cylinder is equal to the outside diameter of round platform maximum, the round platform is located at the top of cylinder, the round platform is taper, and the angle of the angle α of the busbar of the round platform and the center line of guide post is 10 20 °；Cavity is equipped with the guide post body, the guide post further includes boss, the outside diameter of the boss is more than the outside diameter of cylinder, the boss is arranged on the lower section of cylinder, the guide post is pierced by guide post body from cavity, the boss is connected to the inner wall of guide post body, is equipped with mobile limiter in the cavity, the mobile limiter is abutted with the lower face of boss.The present invention is by the way that guide post body and guide post are separated so that guide post can do movement relative to guide post body, so as to adjust contact position of the guide post with guide sleeve, it is achieved thereby that class fit of the guide post with guide sleeve.

Description

A self-guiding centering guide column

technical field

The invention relates to the field of moulds, in particular to guide posts on the mould.

Background technique

Mold, various molds and tools used in industrial production for injection molding, blow molding, extrusion, die-casting or forging forming, smelting, stamping and other methods to obtain the required products. It is mainly a tool for making the blank into a workpiece with a specific shape and size under the action of external force. Widely used in blanking, die forging, cold heading, extrusion, powder metallurgy parts pressing, pressure casting, and compression molding or injection molding of engineering plastics, rubber, ceramics and other products. The mold has a specific contour or cavity shape, and the application of the contour shape with a cutting edge can separate the blank according to the contour line shape (punching). Applying the shape of the inner cavity can make the blank obtain the corresponding three-dimensional shape. The mold generally includes two parts, the movable mold and the fixed mold (or punch and die), which can be separated or combined. Take out the parts when they are separated, and inject the blank into the mold cavity to form when they are closed. The mold is a precision tool with a complex shape and bears the bulging force of the billet. It has high requirements for structural strength, stiffness, surface hardness, surface roughness and machining accuracy. The development level of mold production is one of the important symbols of the level of mechanical manufacturing. In recent years, with the rapid development and general use of the plastics industry, the strength and precision of engineering plastics have been continuously improved, making the application range of plastic products also expanding, such as household appliances, instruments and meters, construction equipment, automobile industry, Japan, etc. In many fields such as hardware, the proportion of plastic products is increasing rapidly. With the increasing demand for plastic products, higher requirements are put forward for the quality of plastic molds.

The guide post is a guide element used in combination with the guide sleeve in the mold to ensure that the mold can move and guide the mold stroke with precise positioning. In order to improve the molding precision of the mold, the existing precision requirements for the guide pillars are getting higher and higher. In the existing mold, the guide post and the guide sleeve are respectively installed on the fixed mold and the movable mold. When the movable mold and the fixed mold are closed, the centering contact surface and the parting surface of the guide post and the guide sleeve are required to be completely Coplanar. In the prior art, the conical surface centering guide post and the conical surface centering guide sleeve are relatively fixedly installed in the mounting holes of the fixed mold and the movable mold, and the contact position of the two is predetermined, so only by adjusting the installation The depth of the hole is such that the contact surface of the guide post and the guide bush is coplanar with the parting surface. And the installation hole can not be adjusted at will, this operation process is often cumbersome, and as the guide post and guide sleeve will wear out during the working process, resulting in changes in the base surface of the two, at this time the depth of the installation hole Adjustment is more time-consuming and laborious.

Contents of the invention

The technical problem to be solved by the present invention is to provide a guide centering structure that can automatically adjust the contact surface between the guide post and the guide sleeve.

The solution of the present invention to solve its technical problem is: an automatic guiding and centering guide post, including a guide post body and a guide post, the guide post includes a cylinder and a circular platform, the cylinder and the circular platform are integrally formed, and the The outer diameter is equal to the outer diameter of the largest part of the circular frustum, the circular frustum is located above the cylinder, the circular frustum is conical, and the angle α between the generatrix of the circular frustum and the center line of the guide column is 10-20°; A mold cavity is provided in the guide post body, and the guide post also includes a boss, the outer diameter of the boss is larger than the outer diameter of the cylinder, the boss is arranged below the cylinder, and the guide post passes through the cavity Out of the guide post body, the boss is in contact with the inner wall of the guide post body, and a movable limiting device is provided in the cavity, and the movable limiting device is in contact with the lower end surface of the boss.

As a further improvement of the above technical solution, the movable limiting device includes an elastic member and a rear cover, the rear cover is detachably connected to the lower end of the guide post body, the upper end of the elastic member abuts against the lower end surface of the boss, The lower end of the elastic member abuts against the back cover.

As a further improvement of the above technical solution, the elastic member is a coil spring, and the rear cover is screwed to the main body of the guide post.

As a further improvement of the above technical solution, the movable limiting device includes an adjusting screw, and the adjusting screw is threadedly connected with the guide column.

As a further improvement of the above technical solution, a rolling bearing is provided in the cavity, the outer side of the rolling bearing abuts against the inner wall of the cavity, and the cylinder abuts against the inner side of the sliding bearing.

As a further improvement of the above technical solution, the guide post body is cylindrical, and the lower end surface of the guide post body is chamfered.

As a further improvement of the above technical solution, the top surface of the circular platform is rounded.

The beneficial effects of the present invention are: the present invention separates the guide post body from the guide post, so that the guide post can perform precise and smooth rolling movement relative to the guide post body, thereby automatically adjusting the contact position between the guide post and the centering surface of the guide sleeve , so as to realize the precision fit between the guide post and the guide sleeve.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly describe the drawings that need to be used in the description of the embodiments. Apparently, the described drawings are only some embodiments of the present invention, not all embodiments, and those skilled in the art can obtain other designs and drawings based on these drawings without creative work.

Fig. 1 is the sectional view of guide post of the present invention;

Fig. 2 is a schematic diagram of the application structure of the present invention;

Fig. 3 is another embodiment of the present invention.

Detailed ways

The idea, specific structure and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, features and effects of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts belong to The protection scope of the present invention. In addition, all the connection/connection relationships mentioned in this article do not refer to the direct connection of components, but mean that a better connection structure can be formed by adding or reducing connection accessories according to specific implementation conditions. The various technical features in the invention can be combined interactively on the premise of not conflicting with each other.

Referring to Figures 1 to 2, an automatic guiding and centering guide column includes a guide column body 1 and a guide column 2. The guide column 2 includes a cylinder 21 and a round table 22, and the cylinder 21 and the round table 22 are integrally formed. The outer diameter of the cylinder 21 is equal to the outer diameter of the maximum point of the circular platform 22, the circular platform 22 is located above the cylinder 21, the circular platform 22 is conical, and the included angle α between the generatrix of the circular platform 22 and the center line of the guide column 2 The angle is 10-20°; the guide post body 1 is provided with a cavity 11, the guide post 2 also includes a boss 23, the outer diameter of the boss 23 is greater than the outer diameter of the cylinder 21, the boss The platform 23 is arranged under the column 21, the guide column 2 passes through the guide column body 1 from the cavity 11, the boss 23 abuts against the inner wall of the guide column body 1, and the cavity 11 is provided with a movable The limiting device 3 , the movable limiting device 3 abuts against the lower end surface of the boss 23 . In the prior art, the guide post body and the guide post are integrally formed, the guide post body is used to be fixedly installed in the formwork, and then the guide post is used to cooperate with the guide sleeve. However, since the existing guide posts are fixed relative to the template after installation, it is difficult to adjust when there is a fit error in the guide posts and guide sleeves. However, the automatic guiding and centering guide post of the present invention innovatively separates the guide post from the guide post body. The contact surface between the guide post and the guide sleeve is changed, the precision is improved, and the adjustment range can be automatically adjusted by using the movable limit device. Preferably, the included angle α of the center line is 15°, that is, the included angle between the two bus bars is 30°. Using the conical surface with large taper as the guide surface of the guide column can make the strength strong and the positioning reliable.

Further as a preferred embodiment, the movable limiting device 3 includes an elastic member 31 and a rear cover 32, the rear cover 32 is detachably connected to the lower end of the guide column body 1, and the upper end of the elastic member 31 abuts against the protrusion. The lower end surface of the platform 23 and the lower end of the elastic member 31 abut against the rear cover 32 . The elastic member is used to support the boss, so as to control the descending range of the guide column.

As a further preferred embodiment, the elastic member 31 is a coil spring, and the rear cover 32 is screwed to the guide post body 1 . Of course, in addition to using coil springs, shrapnel washers can also be used.

Referring to Fig. 3, in addition to the above-mentioned manner, the movable limiting device can also have the following structure: the movable limiting device 3 includes an adjustment screw, and the adjusting screw is threaded with the guide column 2, and it can be known through testing that How much the guide column should go down, and then turn the adjustment screw, and the adjustment screw drives the guide column to move downward when turning, so as to realize the change of the contact surface between the adjustment guide column and the guide sleeve. Of course, compared with automatic adjustment using springs, this method is more cumbersome to adjust.

As a further preferred embodiment, the cavity 11 is provided with a rolling bearing 4 , the outer side of the rolling bearing 4 is in contact with the inner wall of the cavity 11 , and the cylinder 21 is in contact with the inner side of the sliding bearing 4 . By utilizing the sliding bearing, the up and down movement of the guide column can be made more precise.

As a further preferred embodiment, the guide post body 1 is cylindrical, and the lower end surface of the guide post body 1 is chamfered. The guide post body needs to be fixedly connected to the mounting hole of the template, and the lower end surface of the guide post body is chamfered to facilitate the guide post body to enter the mounting hole.

As a further preferred embodiment, the top surface of the round platform 22 is rounded.

Referring to Fig. 2, the guide sleeve is installed in the template A, and the guide post of the present invention is installed in the template B, when the two templates are closing the mould, the inner wall of the guide sleeve will meet the conical surface of the circular frustum of the guide post Make seamless contact, and when the guide post and the guide sleeve are in contact with the template, the guide post will move down, so that when the guide post is in contact with the guide sleeve, template A and template B are also in contact. Moreover, this adjustment is dynamic. With the long-term use of the guide post, the surface of the guide post may be worn, so that the contact surface between the guide post and the guide sleeve may change. However, through the automatic guiding and centering guide post of the present invention, It can be ensured that when the guide post is in contact with the guide sleeve, both the template A and the template B can be in contact, which greatly facilitates the actual use.

The preferred embodiments of the present invention have been described in detail above, but the invention is not limited to the described embodiments, and those skilled in the art can also make various equivalent modifications or replacements without violating the spirit of the present invention. These equivalent modifications or replacements are all within the scope defined by the claims of the present application.

Claims (7)

1. The guide post 1. a kind of automatic guide is felt relieved, including guide post body (1), guide post (2), the guide post (2) include cylinder (21) it is integrally formed with round platform (22), the cylinder (21) with round platform (22), the outside diameter of the cylinder (21) is equal to round platform (22) The outside diameter of maximum, the round platform (22) are located at the top of cylinder (21), it is characterised in that：The round platform (22) is taper, institute The angle for stating the angle α of the busbar of round platform (22) and the center line of guide post (2) is 10-20 °；Set in the guide post body (1) There is cavity (11), the guide post (2) further includes boss (23), and the outside diameter of the boss (23) is more than the outside diameter of cylinder (21), The boss (23) is arranged on the lower section of cylinder (21), and the guide post (2) is pierced by guide post body (1), institute from cavity (11) The inner wall that boss (23) is connected to guide post body (1) is stated, mobile limiter (3), the activity are equipped with the cavity (11) Limiting device (3) is abutted with the lower face of boss (23).
2. The guide post 2. automatic guide according to claim 1 is felt relieved, it is characterised in that：The mobile limiter (3) includes Elastic component (31) and rear cover (32), the rear cover (32) and the lower end releasable connection of guide post body (1), the elastic component (31) upper end is connected to the lower face of boss (23), and the lower end of the elastic component (31) is connected on rear cover (32).
3. The guide post 3. automatic guide according to claim 2 is felt relieved, it is characterised in that：The elastic component (31) is spiral bullet Spring, the rear cover (32) are threadedly coupled with guide post body (1).
4. The guide post 4. automatic guide according to claim 2 is felt relieved, it is characterised in that：The mobile limiter (3) Including adjusting screw, the adjusting screw is threadedly coupled with guide post (2).
5. 5. the automatic guide centering guide post according to claim 3 or 4, it is characterised in that：Rolling is equipped with the cavity (11) Dynamic bearing (4), the outside of the rolling bearing (4) are abutted with the inner wall of cavity (11), the cylinder (21) and sliding bearing (4) Inner side abut.
6. The guide post 6. automatic guide according to claim 1 is felt relieved, it is characterised in that：The guide post body (1) is cylinder, The lower end surface chamfer of the guide post body (1).
7. The guide post 7. automatic guide according to claim 1 is felt relieved, it is characterised in that：The top surface of the round platform (22) has fallen circle Angle.