CN216371247U

CN216371247U - Be applied to one-piece type of horizontal machining center main shaft and draw claw

Info

Publication number: CN216371247U
Application number: CN202121854356.3U
Authority: CN
Inventors: 陶天健; 陶一帆; 陶跃明
Original assignee: Qingyuan Tianyi Cnc Equipment Co ltd
Current assignee: Qingyuan Tianyi Cnc Equipment Co ltd
Priority date: 2020-09-29
Filing date: 2021-08-10
Publication date: 2022-04-26
Anticipated expiration: 2031-08-10

Abstract

The utility model discloses an integrated pull claw applied to a horizontal machining center main shaft, which can be divided into a front part, a middle part and a rear part in appearance, wherein the front part and the middle part are divided into six sections and are in an open state, the rear part is a whole circular ring, and the excircle of the whole circular ring is provided with a machining oil seal groove and a symmetrical bayonet; inner diameter shape: the inner diameter is a through hole, an inner convex step is arranged on the inner diameter of the front part, and a processing internal thread is arranged on the inner diameter of the rear part; in the action process of the integrated pull claw broach, the pull claw moves backwards, the pull claw is extruded and contracted by the inner diameter of the pull claw outer diameter sleeve to pull the broach handle broach, the integrated pull claw moves forwards, the front end of the pull claw moves out of the pull claw outer diameter sleeve, the pull claw automatically opens under the action of the elasticity of the pull claw, and the front end of the broach rod directly pushes the broach handle broach; conclusion the integrated pull claw effectively assists in improving the stability of automatic tool changing of domestic high-end numerical control horizontal machining centers and can improve the good rotating dynamic balance characteristic of the rotating speed of the main shaft.

Description

Be applied to one-piece type of horizontal machining center main shaft and draw claw

Technical Field

The utility model relates to the field of machine tool parts, in particular to an integrated pull claw applied to a horizontal machining center main shaft broach mechanism of a high-end numerical control machine tool.

Background

The horizontal machining center and the opposite machining center of the numerical control boring machine have much higher technical barriers from technical difficulty and complexity, most of domestic numerical control machine tool manufacturers concentrate on the production of the vertical machining center at the middle and low end, the manufacturers for producing the horizontal machining centers can have more fingers, and the horizontal machining centers with high precision can be produced less, but the horizontal machining centers have many advantages relative to the vertical machining centers, firstly, the workbench is open, the installation of machined workpieces is facilitated, a large rotary workbench can be additionally installed, an exchange workbench can be additionally installed, the machining efficiency is improved, and a large tool magazine can be additionally installed to finish a complex machining process; a horizontal machining center needs to be developed, a plurality of details need to be improved and innovated, and the domestic machine tool is a common split type pulling claw aiming at a broaching mechanism in a spindle of the horizontal machining center: the pulling claw is divided into three parts: the pull claw sheet, the pull claw bolt part (divided into inner teeth or outer teeth) with screw thread and the annular spring. The spindle of the horizontal machining center is horizontally arranged, when the broach mechanism is in the same horizontal state, water is easy to accumulate in the taper hole of the spindle, the annular spring is easy to rust for a long time, the fatigue life of the stainless steel spring is not as good as that of carbon steel spring steel, in addition, when the broach is loosened, the front end of the claw sheet of the pulling claw is opened by the elastic hoop of the annular spring, when the annular spring is invalid or has smaller elasticity, the opened claw sheet of the pulling claw, the front end of the pulling claw can droop under the action of the dead weight of the two sheets on the upper surface, the pull nail of the tool handle can be blocked, when the automatic tool changing manipulator pulls out the broach, the situation that the broach falls or the broach cannot be pulled out can occur,

therefore, a new type of pull claw applied to a broach mechanism of a horizontal machining center, which can stably perform a broaching action for a long time, needs to be researched.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a novel pull claw which can effectively and stably act as a loose broach for a long time in order to meet the development requirement of a high-end horizontal machining center.

In order to solve the technical problems, the technical scheme provided by the utility model is as follows: the shape is divided into a front part, a middle part and a rear part, the front part and the middle part are divided into six petals which are in an opening state; the latter part is a whole ring, and the excircle of the whole ring is provided with a processing oil seal groove and a symmetrical bayonet; inner diameter shape: the inner diameter is a through hole, the front end part of the inner diameter is provided with an inward convex step, and the inner diameter of the rear part is provided with a processing internal thread; the spindle broach mechanism developed by applying the integrated broach claw has the following structure in the state of tensioning a broach: the integrated broach is characterized in that a BT shank is assembled in a front taper hole of a spindle shaft core, a shank blind rivet is assembled at the small end of the BT shank, the shank blind rivet is axially pulled towards the rear end of the spindle by an internal pull claw inner diameter front inner convex step, the contact surface angle is 45 degrees and can be modified according to a blind rivet standard, the integrated pull claw is contracted in a pull claw outer diameter sleeve, the pull claw outer diameter sleeve is installed at the front end of a spindle shaft core inner hole, the spindle shaft core inner diameter step is axially positioned, a broach rod penetrates through inner holes of a disc spring group, a disc spring middle spacing ring and a disc spring group, the front end is in threaded connection with the integrated pull claw, the rear end is in threaded connection with a disc spring rear pressing ring and forms a spindle shaft core inner hole broach mechanism together with the pull claw outer diameter sleeve, a shaft core rear cover is in rearward movement limiting, and the spindle core rear cover is in threaded connection with the spindle shaft core.

Compared with the prior art, the utility model has the advantages that:

the novel pull claw is an integrated pull claw, the defect of a split type is avoided, the action of loosening a broach is reliable, the front end of the integrated pull claw is opened when the integrated pull claw is in a free state, a main shaft broach rod pulls the integrated pull claw to move towards the rear end of a main shaft when the broach acts, the front end of the integrated pull claw is extruded and retracted into a pull claw outer diameter sleeve by the front end of the pull claw outer diameter sleeve, and a pull nail is pulled to a pull handle after a certain distance is pulled in; when the cutter is loosened, the broach rod moves forwards to push the integrated type pull claw to move forwards, the handle pull nail is loosened, the front end part of the integrated type pull claw extends out of the outer diameter sleeve of the pull claw, the front end of the integrated type pull claw opens under the elastic action of the pull claw, the handle pull nail is loosened, the front end face of the broach rod pushes the handle pull nail to complete the cutter loosening action, the novel pull claw is reliable in action, the stability of automatic cutter changing is effectively guaranteed, and the failure rate is low.

Secondly, this novel draw claw is the integral type and draws the claw, has good rotatory dynamic balance characteristic, and centrifugal force influence is very little when high-speed rotatory.

According to the drawing claw, the stability of automatic tool changing of domestic high-end numerical control horizontal machining centers is effectively improved in an auxiliary mode, and the good rotating dynamic balance characteristic of the rotating speed of the main shaft can be improved.

Drawings

Fig. 1 is a front view of an integrated pull claw structure applied to a main shaft broaching mechanism of a high-end horizontal machining center.

FIG. 2 is a structural view of an integrated pulling claw applied to a spindle broach mechanism of a high-end horizontal machining center, and is a sectional view taken along line C-C.

Fig. 3 is a structural view of a broach mechanism of an application example of an integrated type pull claw.

FIG. 4 is a drawing showing the state of a broach mechanism tensioning a broach according to an embodiment of an integral type broach application.

Fig. 5 is a schematic view showing a cutter releasing state of a cutter pulling mechanism of an application example of an integrated pulling claw.

As shown in FIG. 3: 1. the tool comprises a spindle shaft core, 2, a BT tool handle, 3, a rivet, 4, an integrated pull claw, 5, a pull claw outer diameter sleeve, 6, a pull tool rod, 7, a disc spring group, 8, a disc spring middle gasket, 9, a disc spring rear pressing ring, 10, a shaft core rear cover, A, a contact surface of an internal convex step of the integrated pull claw and the rivet, and B, a tool handle pull nail rear end face.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The novel pull claw is an integrated pull claw, the appearance of the novel pull claw can be divided into a front part, a middle part and a rear part, the front part and the middle part are divided into six sections and are in an open state, the rear part is a whole ring, and the excircle of the whole ring is provided with a processing oil seal groove and a symmetrical bayonet; FIG. 2 is a cross-sectional view C-C showing the shape of the inner diameter of a through hole, an inwardly projecting step formed in the inner diameter of the former portion, and a processed internal thread formed in the inner diameter of the latter portion;

the size of the pull claw can be modified according to the standard of the tool holder and the tool holder pull nail used by the main shaft, but the principle that the integral pull claw, the pull claw outer diameter sleeve and the pull tool rod interact to control the opening and closing action of the integral pull claw is not changed;

the working principle of the utility model is as follows: referring to fig. 4, when the integrated broach mechanism is applied to the spindle broach mechanism and the tool holder is tensioned, the disc spring rear pressing ring 10 at the rear end of the broach rod of the spindle broach mechanism bears the pushing force F of the piston of the tool releasing cylinder, the broach rod moves towards the front end of the spindle, the integrated broach mechanism is pushed by the broach rod to move forward until the front end of the outer diameter of the integrated broach rod extends out of the broach outer diameter sleeve, the opening state is recovered under the self elastic action, the rear broach rod continues to move forward, and the front end of the broach rod pushes the tool shank rivet B surface, namely the state shown in fig. 5, so that the opening action of the integrated broach is completed, and the tool releasing process is completed;

the process of pulling and tightening the knife by the pulling claw is that the pulling claw is in an open state, namely the knife loosening oil cylinder always presses the rear end of the pulling knife rod to compress the disc spring state, the knife handle is in the automatic knife changing process in the machining center, the knife handle is plugged into the main shaft hole by the mechanical hand, and after a signal is sensed in place, the electromagnetic valve of the main shaft cutter releasing oil cylinder is reversed, the piston of the cutter releasing oil cylinder retreats, the rear end of the main shaft retreats after the cutter pulling rod is pushed in the deformation recovery process of the disc spring, the integral pulling claw connected with the broach rod through threads retreats, the front end of the integral pulling claw is extruded by the inner diameter of the front end of the pulling claw outer diameter sleeve to shrink into the pulling claw outer diameter sleeve, the A surface of the integral pulling claw pulls the broach handle rivet to move backwards to the position after the broach handle is tensioned, the integral pull claw does not move backwards any more, the broach rod does not move backwards any more, the main shaft unclamping oil cylinder piston is separated from the rear pressing ring of the disc spring at the rear end of the broach rod, and the process of tensioning the hilt by the integral pull claw is completed, namely the process from the state shown in fig. 5 to the state shown in fig. 4.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of the utility model, "plurality" means two or more unless explicitly specifically defined otherwise.

In the present invention, unless otherwise specifically stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

In the description herein, reference to the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.

Claims

1. An integral pulling claw applied to a spindle of a horizontal machining center, wherein the front part and the middle part of the integral pulling claw are divided into six petals and are in an open state; the latter part is a whole ring, and the excircle of the whole ring is provided with a processing oil seal groove and a symmetrical bayonet; inner diameter shape: the inner diameter is a through hole, the inner diameter of the front part is an inward convex step, and the inner diameter of the rear part is provided with a processing internal thread; the spindle broach mechanism developed by applying the integrated broach claw has the following structure in the state of tensioning a broach: the integral type broach is characterized in that a BT shank (2) is assembled in a front taper hole of a spindle shaft core (1), a shank blind rivet (3) is assembled at the small end of the BT shank, the shank blind rivet is axially pulled to the rear end of the spindle by an integral type pull claw (4) inner diameter front inner boss, the integral type pull claw is contracted in a pull claw outer diameter sleeve (5), the pull claw outer diameter sleeve is installed at the front end of a spindle shaft core inner hole, the spindle shaft core inner diameter step is axially positioned, a pull cutter rod (6) penetrates through a disc spring group (7), a disc spring middle spacing ring (8) and a disc spring group (7) inner hole, the front end is in threaded connection with the integral type pull claw (4), the rear end is in threaded connection with a disc spring rear pressing ring (9) and forms a spindle shaft core inner broach mechanism with the pull claw outer diameter sleeve (5), a shaft core rear cover (10) is in backward movement limiting, and the spindle core rear cover is in threaded connection with the spindle shaft core.