阅读说明：本技术 一种螺旋线钻孔攻丝机构 (Spiral line drilling and tapping mechanism ) 是由 赖培忠 曹维璋 于 2019-07-31 设计创作，主要内容包括：本发明公开了一种螺旋线钻孔攻丝机构,包括机构底座,以及与机构底座配合连接的机构外罩,所述机构底座与机构外罩构成一机构本体,其特征在于,所述机构本体包括主轴机构,所述主轴机构包括表面设有螺纹的管套,套设在管套上的螺母,以及穿设在管套内部中轴线上的主轴,其中,所述主轴的一端连接有刀具连接端,所述主轴的另一端连接有用于驱动其自身自转的主轴驱动机构,所述主轴与主轴驱动机构动力输出轴之间通过联轴器连接一起,所述机构本体还包括用于传动螺母原地正反自转的螺母驱动装置,所述管套整体在螺母的原地正反自转作用下使其沿指定方向做直向线性运动。(The invention discloses a spiral line drilling and tapping mechanism, which comprises a mechanism base and a mechanism outer cover matched and connected with the mechanism base, wherein the mechanism base and the mechanism outer cover form a mechanism body, it is characterized in that the mechanism body comprises a main shaft mechanism, the main shaft mechanism comprises a pipe sleeve with a thread on the surface, a nut sleeved on the pipe sleeve and a main shaft penetrating through the central axis in the pipe sleeve, wherein one end of the main shaft is connected with a cutter connecting end, the other end of the main shaft is connected with a main shaft driving mechanism for driving the main shaft to rotate, the main shaft is connected with the power output shaft of the main shaft driving mechanism through a coupler, the mechanism body also comprises a nut driving device for driving the nut to rotate forwards and backwards in situ, the whole pipe sleeve is driven to do straight linear motion along the appointed direction under the in-situ positive and negative autorotation action of the nut.)

1. A spiral line drilling and tapping mechanism comprises a mechanism base and a mechanism outer cover matched and connected with the mechanism base, wherein the mechanism base and the mechanism outer cover form a mechanism body, it is characterized in that the mechanism body comprises a main shaft mechanism, the main shaft mechanism comprises a pipe sleeve with a thread on the surface, a nut sleeved on the pipe sleeve and a main shaft penetrating through the central axis in the pipe sleeve, wherein one end of the main shaft is connected with a cutter connecting end, the other end of the main shaft is connected with a main shaft driving mechanism for driving the main shaft to rotate, the main shaft is connected with a power output shaft of the main shaft driving mechanism through a coupler, the mechanism body also comprises a nut driving device for driving the nut to rotate forwards and backwards in situ, the whole pipe sleeve is driven to do straight linear motion along the appointed direction under the in-situ positive and negative autorotation action of the nut.

2. The spiral drilling and tapping mechanism according to claim 1, wherein the nut driving device is a belt synchronous transmission device, and comprises a nut driven pulley arranged on the nut, and a nut driving pulley connected to a power output shaft of the nut driving device, the nut driving pulley and the nut driven pulley are connected through a transmission belt, and power is synchronously transmitted to the nut driven pulley through the transmission belt under the rotation of the nut driving pulley.

3. The spiral drilling and tapping mechanism of claim 2, wherein the nut drive mechanism and the spindle drive mechanism are both servo motors.

4. The spiral drilling and tapping mechanism according to claim 1, wherein the spindle mechanism further comprises a nut driving mechanism assembly, the nut driven pulley is sleeved on the large outer diameter of the front end portion of the nut, the small outer diameter of the rear end portion of the nut is arranged in the nut driving mechanism assembly in a penetrating mode, and the nut driving mechanism assembly is sleeved outside the pipe sleeve and is close to the rear side of the nut driven pulley.

5. The spiral drilling and tapping mechanism according to claim 4, wherein the spindle mechanism further comprises a spindle chip shield that is sleeved on the sleeve and is adjacent to the front side of the nut driven pulley.

6. The spiral drilling and tapping mechanism according to claim 5, wherein the front half of the spindle mechanism is disposed on the mechanism base through the nut holder, and the rear half of the spindle mechanism is disposed on the mechanism base through the spindle driving mechanism holder.

7. The spiral drilling and tapping mechanism according to claim 6, wherein an anti-rotation limiting guide rod is arranged between the nut fixing seat and the spindle driving mechanism fixing seat.

8. The helical drilling and tapping mechanism according to claim 1, wherein said cutter is a tapping cutter, a grinding cutter, a boring cutter, or a threading cutter.

9. The helical drilling and tapping mechanism according to any one of claims 1 to 8, further comprising a controller for use with the helical drilling and tapping mechanism, the controller controlling the spindle servo motor and the nut servo motor.

Technical Field

The invention relates to the technical field of manufacturing of drilling and tapping mechanical equipment, in particular to a spiral line drilling and tapping mechanism.

Background

The existing spiral line drilling and tapping mechanism is characterized in that a pipe sleeve is connected with a driving device through a linkage piece, if the publication number is CN2792675Y, the patent is named as a tapping device, a passive sleeve piece is arranged, the outer side of the passive sleeve piece is integrally connected with the linkage piece, the linkage piece moves in a straight linear mode through a power output rod fixed on a supporting shaft, the transmission mode is adopted, the passive sleeve piece moves in the moving process due to inertia, the moving distance (namely the tooth pitch) of the pipe sleeve is not accurate enough, in addition, in the machining process, the passive sleeve piece is easy to shake, and the problem of low machining precision is caused.

An urgent need for a spiral drilling mechanism can further improve the actual processing demand and further consolidate and prevent that the part from rocking and the inaccurate problem of passive axle displacement distance.

Disclosure of Invention

The invention aims to provide a spiral drilling and tapping mechanism which can further solve the problems of component shaking and inaccurate moving distance of a placed driven shaft.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides a helix drilling and tapping mechanism, includes the mechanism base to and the mechanism dustcoat of being connected with the mechanism base cooperation, the mechanism base constitutes a mechanism body with the mechanism dustcoat, the mechanism body includes main shaft mechanism, main shaft mechanism establishes the screwed pipe box including the surface, and the cover establishes the nut on the pipe box to and wear to establish the main shaft on the inside axis of pipe box, wherein, the one end of main shaft is connected with the cutter link, the other end of main shaft is connected with the main shaft drive mechanism who is used for driving its self rotation, be in the same place through the coupling joint between main shaft and the main shaft drive mechanism power output shaft, the mechanism body still includes the nut drive arrangement who is used for the original place positive and negative rotation of transmission nut, the pipe box is whole to make it be straight linear motion along the specified direction under the.

The nut driving device is a belt synchronous transmission device and comprises a nut driven belt pulley arranged on the nut and a nut driving belt pulley connected to a power output shaft of the nut driving mechanism, the nut driving belt pulley is connected with the nut driven belt pulley through a transmission belt, and power is synchronously transmitted to the nut driven belt pulley through the transmission belt under the rotation of the nut driving belt pulley.

And the nut driving mechanism and the main shaft driving mechanism are servo motors.

The main shaft mechanism further comprises a nut transmission mechanism assembly, the nut driven belt pulley is sleeved on the large outer diameter of the front end portion of the nut, the small outer diameter of the rear end portion of the nut penetrates through the nut transmission mechanism assembly, the nut transmission mechanism assembly is sleeved outside the pipe sleeve, and the nut transmission mechanism assembly is close to the rear side of the nut driven belt pulley.

The main shaft mechanism further comprises a main shaft anti-scrap cover, wherein the main shaft anti-scrap cover is sleeved on the pipe sleeve and is close to the front side of the nut driven belt pulley.

The front half part of the spindle mechanism is arranged on the mechanism base through a nut fixing seat, and the rear half part of the spindle mechanism is arranged on the mechanism base through a spindle driving mechanism fixing seat.

And an anti-rotation limiting guide rod is arranged between the nut fixing seat and the main shaft driving mechanism fixing seat.

The cutter is a tapping cutter, a tooth grinding cutter, a tooth boring cutter or a tooth turning cutter.

The spiral drilling mechanism can also comprise a controller, wherein a nut servo motor control circuit, a central processing unit circuit and an inner shaft driving motor current acquisition circuit are arranged in the controller. Under the control of the controller, the pitch and the pitch feeding speed, the R-axis rotating speed and the rotating angle are accurately controlled through the mutual matching of the nut servo motor and the inner shaft servo motor, so that the motion control of the screw can be realized; after processing tools such as a threading tool, a boring tool, a grinding tool and the like are configured, the processing technology of the spiral bodies such as threading, boring, grinding and the like can be realized. Therefore, the processing of the inner hole and the outer diameter of the workpiece, particularly the processing of the spiral body can be completed, a processing device is not required to be additionally configured, and the use cost is reduced.

In addition, the controller can also control the inner shaft servo motor and the nut servo motor to realize high-frequency pecking type drilling and tapping, and change the traditional drilling mode into a high-frequency continuous advancing and retreating mode, so that a high-frequency vibration type drilling mode is formed, deep hole machining and machining of materials difficult to machine are easy, the problems that the cutter is quickly abraded and even broken due to the fact that chips are not easily removed and cutting fluid is not easily infiltrated can be avoided, the problem that chips are removed and slag is discharged and the cutter of the machining fluid is fed can be generated, and machining quality and machining precision are improved.

The invention has the beneficial effects that:

1. the main shaft mechanism adopts a structure of a shaft-in-shaft sleeve, a nut and a nut driven belt pulley are sleeved on a pipe sleeve and fixed, an acting force is applied to the nut driven belt pulley through a nut driving belt pulley on a nut driving device, power is transmitted to the nut driven belt pulley on the main shaft mechanism through a transmission belt under the rotation of the nut driving belt pulley, the pipe sleeve integrally makes a straight linear motion along an appointed direction under the in-situ positive and negative autorotation action of the nut driven belt pulley, and meanwhile, a transmission shaft of the main shaft driving mechanism is connected with a main shaft through a coupler and drives the main shaft to make the main shaft of a cutter rotate, so that a tool assembly and a moving assembly move synchronously.

2. According to the invention, the anti-rotation limiting guide rod is arranged between the nut fixing seat and the main shaft driving mechanism fixing seat, so that the position between the nut fixing seat and the main shaft driving mechanism fixing seat is further consolidated, and the problems of component shaking and inaccurate pipe sleeve moving distance are prevented.

3. The controller used in cooperation with the servo motor controls the servo motor to continuously rotate forwards and backwards, so that the pipe sleeve continuously moves in a reciprocating manner, flexible machining can be realized, and compared with the traditional direct type rigid machining, the cutting oil loss can be effectively reduced; reducing wear to the cutting tool; the processing load is small; the machined material can be detected, and the rejection of workpieces caused by forced tapping can be avoided; the processing quality is high; the problem that the cutter is broken due to overlarge torsion can be avoided.

To more clearly illustrate the structural features and effects of the present invention, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

Drawings

FIG. 1 is a schematic view of the overall structure of the spiral drilling and tapping mechanism;

FIG. 2 is a schematic diagram of the internal structure of the present spiral drilling and tapping mechanism;

FIG. 3 is a schematic diagram of the internal structure of the present spiral drilling and tapping mechanism;

FIG. 4 is a schematic diagram of the internal structure of the present spiral drilling and tapping mechanism;

FIG. 5 is a schematic side view of the present spiral drilling and tapping mechanism;

FIG. 6 is a schematic side view of the present helical drilling and tapping mechanism;

fig. 7 is a schematic side view of the helical drilling and tapping mechanism.

In the figure: 1. the mechanism comprises a mechanism base 2, a mechanism outer cover 3, a main shaft mechanism 4, a pipe sleeve 5, a nut driven belt pulley 6, a nut driving mechanism 7, a main shaft 8, a connecting end 9, a main shaft driving mechanism 10, a coupler 11, a nut driving belt pulley 12, a nut fixing seat 13, a main shaft driving mechanism fixing seat 14, a nut transmission mechanism assembly 15, a main shaft chip-proof cover 16, a cutter 17, an anti-rotation limiting guide rod 18, a nut 19 and a transmission belt.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 7, the helical drilling and tapping mechanism of the present embodiment includes a mechanism base 1, and a mechanism outer cover 2 which is matched and connected with the mechanism base 1, wherein the mechanism base 1 and the mechanism outer cover 2 form a mechanism body, the mechanism body comprises a main shaft mechanism 3, the main shaft mechanism 3 comprises a pipe sleeve 4 with threads on the surface, a nut 18 sleeved on the pipe sleeve 4, and a main shaft 7 penetrating through the central axis in the pipe sleeve 4, wherein one end of the main shaft 7 is connected with a cutter connecting end 8, the other end of the main shaft 7 is connected with a main shaft driving mechanism 9 for driving the main shaft to rotate, the main shaft 7 is connected with a power output shaft of a main shaft driving mechanism 9 through a coupling 10, the mechanism body also comprises a nut driving device for driving the nut 18 to rotate forwards and backwards in situ, the pipe sleeve 4 integrally makes a straight linear motion along a designated direction under the in-situ positive and negative rotation action of the nut 18.

The spiral drilling and tapping mechanism that this embodiment provided, nut drive arrangement are belt synchronous drive device, and it is including locating nut driven pulley 5 on the nut 18 connects in nut driving pulley 11 on the 6 power output shaft of nut drive mechanism, be connected through drive belt 19 between nut driving pulley 11 and the nut driven pulley 5, through this drive belt 19 with power transmission to nut driven pulley 5 in step under nut driving pulley 11 rotates.

In the spiral drilling and tapping mechanism provided by this embodiment, the nut driving mechanism 6 and the spindle driving mechanism 9 are both servo motors.

The helix drilling and tapping mechanism that this embodiment provided, spindle mechanism 3 still includes nut drive mechanism assembly 14, the nut driven pulley 5 cover is established on the big external diameter of preceding tip of nut 18, the little external diameter of rear end portion of nut 18 is worn to establish in nut drive mechanism assembly 14, 14 covers of nut drive mechanism assembly are established outside pipe box 4, and its rear side that is close to nut driven pulley 5.

The helix drilling and tapping mechanism that this embodiment provided, spindle mechanism 3 still includes main shaft chip-proof cover 15, main shaft chip-proof cover 15 cover is established on pipe box 4, and its front side that is close to nut driven pulley 5. The front half part of the spindle mechanism 3 is arranged on the mechanism base 1 through a nut fixing seat 12, and the rear half part of the spindle mechanism is arranged on the mechanism base 1 through a spindle driving mechanism fixing seat 13. And an anti-rotation limiting guide rod 17 is arranged between the nut fixing seat 12 and the main shaft driving mechanism fixing seat 13.

In the spiral drilling and tapping mechanism of the present embodiment, the cutter 16 is a tapping cutter, a grinding cutter, a boring cutter, or a threading cutter.

The embodiment further provides a controller (not shown in the figure) for controlling the spiral line drilling and tapping mechanism, and a nut servo motor control circuit, a spindle servo motor control circuit, a central processing unit circuit and a spindle servo motor current acquisition circuit are arranged in the controller.

The controller obtains real-time feedback current of the spindle servo motor, and when the real-time feedback current reaches a preset value, the controller sends a reverse pulse signal to control the servo motor to return, wherein the preset value is 0-3 times of rated current (current value during uniform rotation) of the spindle servo motor.

The controller converts the tooth pitch and the R shaft rotation period into a plurality of current digital pulses, so that after a main shaft servo motor feeds back high current, the current R shaft rotation angle position and the tooth pitch position are obtained, the currently obtained pulse position is converted into a torque force value after being operated and processed by a central processing circuit, the current torque force value is compared with a preset allowed maximum torque force value, whether the forward processing is continued or a control return control signal is sent, the main shaft servo motor and a nut servo motor are reversed, the original path is returned, when the current torque force value is smaller than a preset value, the forward processing is continued, and when the current torque force value is larger than the preset value, the return is performed, so that the accurate control is realized, and the cutter is prevented from being broken.

The cutter of the embodiment can also be a turning tooth cutter, a boring tooth cutter, a grinding tooth cutter and the like, and the pitch, the feeding speed of the pitch, the rotating speed and the rotating angle of an R shaft can be accurately controlled through the mutual matching of a main shaft servo motor and a nut servo motor under the control of a controller, so that the motion control of a screw can be realized; after processing tools such as a turning tooth cutter, a boring tooth cutter, a grinding tooth cutter and the like are configured, the processing technology of spiral bodies such as the turning tooth, the boring tooth and the grinding tooth can be realized. Therefore, the processing of the inner hole and the outer diameter of the workpiece, particularly the processing of the spiral body can be completed, a processing device is not required to be additionally arranged, and the use cost is reduced.

The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments, using the methods and techniques disclosed above, without departing from the scope of the present invention. Therefore, all equivalent changes made according to the shape, structure and principle of the present invention without departing from the technical scheme of the present invention shall be covered by the protection scope of the present invention.