CN111659906A - Machine tool for static machining of workpiece - Google Patents

Abstract

The invention discloses a machine tool for static machining of workpieces, which comprises a spindle box and several self-centering fixtures. The spindle box is provided with a servo expanding tool head and a spindle servo motor, and the servo expanding tool head is provided with a tool adjusting block and a turning tool. There are also X-axis servo motors and transmission connectors on the spindle box. In this machine tool, the two clamps on the self-centering fixture can move closer to the center to clamp the workpiece to be processed. According to the length of the workpiece to be processed, two or more self-centering fixtures are selected to complete the clamping of the workpiece. This structure can be applied to The clamping of workpieces of different specifications to be processed, and the tool adjustment block on the servo spreader head can be adjusted by the X-axis servo motor to adjust the machining radius of the turning tool, and the spindle servo motor can drive the servo spreader head to rotate for workpiece processing. Therefore, the processing when the workpiece is stationary can effectively reduce the processing cost of the workpiece and improve the processing efficiency. The invention is used in the field of machine tool structures.

Description

A machine tool for static machining of workpieces

technical field

The invention relates to the field of machine tools, in particular to a machine tool for static machining of workpieces.

Background technique

Machine tools mainly include machine tools that use turning tools to turn rotating workpieces. On the machine tool, drills, reaming drills, reamers, taps, dies and knurling tools can also be used for corresponding processing. According to different uses and structures, machine tools are mainly divided into horizontal machine tools, vertical machine tools, and turret machine tools. , row cutter machine tool, copying machine tool and multi-tool machine tool and various specialized machine tools, such as camshaft machine tool, crankshaft machine tool, wheel machine tool, tooth shovel machine tool and so on.

Among all machine tools, horizontal machine tools are the most widely used. The turning process is basically a processing method in which the workpiece rotates and the tool does not rotate, but for workpieces that are particularly heavy and long, and for workpieces with strange shapes and large turning diameters, from the perspective of energy saving and economy, this kind of The processing method is not the best choice, because when the workpiece is particularly heavy, a large motor is required to rotate the workpiece, and the speed cannot be too high, resulting in high energy consumption and low efficiency. When the workpiece is very long, the rotation of the workpiece first needs to be driven by a high-power motor, then the workpiece is too long, and the rotational speed cannot be too high. Finally, the workpiece that is too long rotates at a high speed and requires many support points, and the machining accuracy of such a long workpiece rotation will also be reduced. There is a certain influence; there are also odd-shaped workpieces and workpieces with a very large rotation diameter. The workpiece needs to be dynamically balanced to rotate at a high speed, which will increase the cost. For workpieces with a very large rotation diameter, the rotation diameter of the machine tool is required to be very large, so large machine tools can Processing, resulting in very high processing costs.

Is there an alternative way to process these workpieces that are particularly heavy, long, odd-shaped and have a particularly large turning diameter? Now, for these parts in the market, the general solution is to use a horizontal machining center. For milling, the workpiece does not rotate, and the milling cutter performs circumferential interpolation for milling. This processing method usually has the disadvantages of low efficiency, high cost, and low precision.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide a machine tool for static machining of workpieces, which can effectively reduce machining costs and improve machining efficiency.

According to an embodiment of the first aspect of the present invention, a machine tool for static machining of workpieces is provided, comprising a headstock and a plurality of self-centering fixtures arranged at intervals on one side of the headstock, the headstock is provided with a servo motor A cutter head and a spindle servo motor that drives the rotation of the servo-expanding cutter head, the servo-expanding cutter head is provided with a cutter adjustment block and a turning tool installed on the cutter adjustment block, and the spindle box is also provided with an X an axis servo motor and a transmission connecting piece connected between the X-axis servo motor and the servo expanding tool head, the X-axis servo motor drives the transmission connecting piece to drive the tool adjusting block along the servo expanding tool head For lateral sliding, each of the self-centering clamps is provided with two clamps that are symmetrically arranged and move synchronously toward each other.

Beneficial effect: In this machine tool for static processing, the two clamps on the self-centering fixture can move closer to the center to clamp the workpiece to be processed, and two or more self-centering fixtures can be selected according to the length of the workpiece to be processed to complete the workpiece. This structure is suitable for clamping workpieces of different specifications, and can adjust the tool adjustment block on the servo spreader head through the X-axis servo motor to adjust the machining radius of the turning tool, and drive the servo through the spindle servo motor. The display head rotates to process the workpiece, so as to realize the processing when the workpiece is stationary, which can effectively reduce the cost of workpiece processing and improve the processing efficiency.

According to the machine tool for static machining of workpieces according to the embodiment of the first aspect of the present invention, the machine tool includes a bed body, the bed body is provided with a Z-direction guide rail and a Z-axis servo motor, and the headstock is mounted on the bed The body can be moved along the Z-direction guide rail, and the symmetrical axes of the clamps arranged opposite to each other are arranged along the Z-direction.

The bar workpiece to be processed is erected between each group of self-centering fixtures, and the bar workpiece is clamped by the fixtures arranged opposite to each other on the centering fixtures. The spindle box with the servo spreader head is under the action of the Z axis servo motor. Slide along the Z-direction guide to feed the knife.

According to the machine tool for stationary machining of workpieces according to the embodiment of the first aspect of the present invention, a motor seat for installing the X-axis servo motor is connected to the tail of the headstock, and the transmission connector includes a motor seat disposed on the motor. The X-axis screw rod in the seat and the first pull rod connected between the X-axis screw rod and the servo spreader head.

The X-axis servo motor drives the X-axis screw to rotate, which can push the entire transmission connector to perform telescopic movement. The overall telescopic movement of the transmission connector can drive the tool adjustment block in the servo spreader head to slide laterally, thereby adjusting the machining radius of the turning tool.

The first tie rod and the X-axis screw rod are connected by a connecting sleeve, and a rolling bearing is arranged between the connecting sleeve and the first tie rod, so that when the servo spreader head is driven to rotate by the spindle servo motor, the X-axis screw rod can not be driven to rotate, and the transmission connection is not carried out. The structure at the rear of the unit is affected.

According to the machine tool for stationary machining of workpieces according to the embodiment of the first aspect of the present invention, transmission teeth are provided on the side surfaces of each of the tool adjusting blocks, and gears meshing with the transmission teeth are installed in the servo spreader head , a transmission rod connected with the gear is also arranged in the servo spreader head, and the transmission rod extends from the axis of the servo spreader head and is connected with the end of the first pull rod.

The X-axis servo motor drives the X-axis screw to rotate, pushes the transmission connector to do telescopic motion, and the far end of the transmission connector drives the gear to move, so as to drive the tool adjustment block to slide laterally in the servo spreader head to adjust the machining radius of the turning tool. adjust.

According to the machine tool for static machining of workpieces according to the embodiment of the first aspect of the present invention, the X-axis screw is connected to the output end of the X-axis servo motor through a coupling.

According to the machine tool for static machining of workpieces according to the embodiment of the first aspect of the present invention, a connecting sleeve is provided outside the butting end of the X-axis screw and the first pull rod, and the connecting sleeve is connected to the X-axis screw A shaft sleeve is provided between the rods, a rolling bearing is provided between the connecting sleeve and the end of the first pull rod, and the end of the first pull rod is provided with a fastening nut located at the outer end of the rolling bearing.

The transmission connecting piece is divided into the X-axis screw rod and the first pull rod which are connected in sections, and flexible connection is adopted between each section and between each section and the servo motor and other connecting pieces.

According to the machine tool for static machining of workpieces according to the embodiment of the first aspect of the present invention, the shaft end of the headstock is provided with two self-centering fixtures arranged at intervals, and each of the self-centering fixtures includes two symmetrically arranged self-centering fixtures. The clamp and the sliders respectively connected under the two clamps are also provided with a horizontal drive mechanism, the output end of the horizontal drive mechanism is connected with a second pull rod, and the second pull rod transversely passes through the two sliders, The second pull rod is provided with a left stop block and a right stop block on both sides of one of the sliders, and a horizontally arranged Z-axis screw rod is arranged below the two sliders. The Z-axis screw Both sides of the rod are respectively provided with a positive helical segment and a reverse helical segment, and a nut that moves with the rotation of the Z-axis screw is installed on the positive helical segment and the reverse helical segment, and the nut is connected with the slider. With nut seat.

In this machine tool structure for static machining, the self-centering fixture holds the workpiece to be machined through two opposite and symmetrically arranged fixtures. During the machining process, the horizontal drive mechanism is activated. When machining workpieces of different sizes and diameters to be machined, the second The pull rod drags the sliders under the two clamps to move toward each other, and the two sliders follow the nut and the nut seat to move toward each other along the Z-axis screw rod, so that the center of the workpiece to be processed held between the two clamps can always be in the original position, which can significantly improve the workpiece. High clamping accuracy, and can be suitable for clamping various specifications of bars.

The setting of the self-centering fixture makes the clamping center of the machine tool remain unchanged during the clamping process of bars with different specifications and diameters, so that the machining radius of the turning tool on the servo spreader head with the same machining axis can be adjusted. , to use the processing of different specifications of the bar.

According to the machine tool for static machining of workpieces according to the embodiment of the first aspect of the present invention, the opposite sides of the fixture are provided with V-shaped holding openings, and spacers are installed on both sides of the V-shaped holding openings, The V-shaped holding openings and the cushion blocks on the two clamps are symmetrically arranged.

The V-shaped holding openings set on the clamps on both sides are arranged opposite to each other to form a holding opening, and the workpiece to be processed is placed in the holding opening. The workpiece to be machined remains in a stable clamping state. The V-shaped holding openings and spacers on both sides are symmetrically arranged, so that when machining bar parts, the center of the bar parts is always on the symmetrical axis of the two oppositely arranged fixtures, which can maintain stable clamping of workpieces of different specifications to be processed. .

According to the machine tool for static machining of workpieces according to the embodiment of the first aspect of the present invention, the self-centering fixture further includes a fixture seat, and two sides of the fixture seat are provided with support arms, and the Z-axis screw rod is erected Between the two support arms, the two support arms are provided with bearings for erecting the Z-axis screw rod, and locking sleeves are provided at both ends of the Z-axis screw rod.

The Z-axis screw rod is arranged parallel to the sliding direction of the second pull rod and the two sliders, and the Z-axis screw rod and the second pull rod are both set horizontally, which can make the axis of the fixture as a whole and the center of gravity vertically align downward. When the workpiece is processed, the overall stability of the fixture can be better maintained. Both ends of the Z-axis screw rod are locked between the two support arms on the fixture seat by locking sleeves, and bearing support is provided at both ends and fixed by the locking sleeves to prevent the Z-axis screw rod from shifting during operation. Affects the stability of workpiece clamping.

According to the machine tool for static machining of workpieces according to the embodiment of the first aspect of the present invention, the horizontal driving mechanism is a hydraulic cylinder, an output end of the hydraulic cylinder is provided with a hydraulic shaft, and the second pull rod is threadedly connected to the At the front end of the hydraulic shaft, both the sliders are provided with pull rod holes, the second pull rod protrudes through the two pull rod holes, and the outer diameter of the left stop block at the end of the second pull rod is larger than the The diameter of the pull rod hole, the other side of the pull rod hole located at the distal end of the second pull rod is provided with a right stop block threadedly connected with the second pull rod, and the right stop block is locked so that the first pull rod is locked. The two pull rods are relatively fixedly arranged with the sliding block located at the distal end of the second pull rod.

The second tie rod is installed on the front end of the hydraulic shaft through a threaded connection, which can facilitate the overall assembly of the fixture. The left stop block and the right stop block are respectively installed at both ends of the pull rod hole. When the two clamps move toward or away from each other, the two sliders are driven to slide, so that the second pull rod can be connected to the second pull rod at the far end of the second pull rod. The slider is relatively fixed, and there is no movement lag when moving, so it will not affect the accuracy.

Description of drawings

Below in conjunction with accompanying drawing and embodiment, the present invention is further described;

1 is a schematic diagram of the overall structure of an embodiment of the present invention;

2 is a schematic structural diagram of a self-centering fixture in an embodiment of the present invention;

3 is a schematic cross-sectional structure diagram of a self-centering outcome in an embodiment of the present invention;

FIG. 4 is a schematic diagram of the connection structure of the servo spreader head and the transmission connector in the embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of the connection structure of the servo spreader head and the transmission connector in the embodiment of the present invention;

FIG. 6 is a front view of the connection structure of the servo spreader head and the transmission connecting piece in the embodiment of the present invention.

Detailed ways

This part will describe the specific embodiments of the present invention in detail, and the preferred embodiments of the present invention are shown in the accompanying drawings. Each technical feature and overall technical solution of the invention should not be construed as limiting the protection scope of the invention.

In the description of the present invention, it should be understood that the azimuth description, such as the azimuth or position relationship indicated by up, down, front, rear, left, right, etc., is based on the azimuth or position relationship shown in the drawings, only In order to facilitate the description of the present invention and simplify the description, it is not indicated or implied that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description of the present invention, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including this number, above, below, within, etc. are understood as including this number. If it is described that the first and the second are only for the purpose of distinguishing technical features, it cannot be understood as indicating or implying relative importance, or indicating the number of the indicated technical features or the order of the indicated technical features. relation.

In the description of the present invention, unless otherwise clearly defined, words such as setting, installation, connection should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

1 to 3 , a machine tool for static machining of workpieces is provided, including a spindle box 100 and a plurality of self-centering fixtures 200 arranged at intervals on one side of the spindle box 100 . The spindle box 100 is provided with a servo spreading tool head 110 and a spindle servo motor 120 that drives the rotation of the servo-expanding tool head 110. The servo-expanding tool head 110 is provided with a tool adjustment block 111 and a turning tool 112 installed on the tool adjustment block 111. The spindle box 100 is also provided with an X-axis servo motor 130 and a transmission connecting piece 140 connected between the X-axis servo motor 130 and the servo expanding tool head 110, the X-axis servo motor 130 drives the transmission connecting piece 140 to drive the tool adjusting block 111 to slide laterally along the servo expanding tool head 110, and the centering fixtures are respectively 200 are provided with two symmetrically arranged clamps 210 that can move synchronously toward each other.

In this machine tool for static machining, the two clamps 210 on the self-centering clamp 200 can move closer to the center to clamp the workpiece to be processed, and two or more self-centering clamps 200 are selected according to the length of the workpiece to be processed to complete the machining of the workpiece. This structure is suitable for clamping workpieces of different specifications to be processed, and can adjust the tool adjustment block 111 on the servo spreader head 110 through the X-axis servo motor 130 to adjust the machining radius of the turning tool 112, and through the spindle The servo motor 120 drives the servo spreader head 110 to rotate to process the workpiece, so as to realize the processing when the workpiece is stationary, which can effectively reduce the cost of workpiece processing and improve the processing efficiency.

In some of the embodiments, the machine tool includes a bed 1000, the bed 1000 is provided with a Z-direction guide rail 310 and a Z-axis servo motor 300, and the headstock 100 is mounted on the bed 1000 and can move along the Z-direction guide rail 310. The symmetry axes of the clamps 210 disposed opposite to each other are arranged along the Z direction.

The bar workpiece to be processed is erected between each group of self-centering fixtures 200, and the bar workpiece is clamped by the fixtures 210 arranged opposite to each other on the centering fixture 200. The shaft servo motor 300 slides along the Z-direction guide rail 310 to feed the knife.

Referring to FIGS. 4 to 6 , in some of the embodiments, a motor base 131 for installing the X-axis servo motor 130 is connected to the tail of the headstock 100 , and the transmission connector 140 includes an X-axis screw disposed in the motor base 131 . 141 and the first pull rod 142 connected between the X-axis screw 141 and the servo spreader head 110 .

The X-axis servo motor 130 drives the X-axis screw 141 to rotate, which can push the transmission connector 140 to perform telescopic motion as a whole. The machining radius of the turning tool 112.

The first pull rod 142 and the X-axis screw rod 141 are connected by a connecting sleeve, and a rolling bearing is arranged between the connecting sleeve and the first pull rod 142, so that when the spindle servo motor 120 drives the servo spreader head 110 to rotate, the X-axis screw rod may not be driven The rotation of 141 does not affect the structure of the rear of the transmission link 140 .

In some of the embodiments, the side surfaces of each tool adjusting block 111 are provided with transmission teeth, the servo spreader head 110 is provided with a gear that meshes with the transmission teeth, and the servo spreader head 110 is also provided with a transmission gear connected to the gear. The transmission rod extends from the axis of the servo spreader head 110 and is connected to the end of the first pull rod 142 .

The X-axis servo motor 130 drives the X-axis screw 141 to rotate, pushes the transmission connector 140 to perform telescopic motion, and the distal end of the transmission connector 140 drives the gear to move, thereby driving the tool adjustment block 111 to slide laterally in the servo spreader head 110 . The adjustment of the machining radius of the turning tool 112 is performed.

Referring to FIGS. 4 to 6 , in some embodiments, the X-axis screw 141 is connected to the output end of the X-axis servo motor 130 through a coupling.

In some of the embodiments, a connecting sleeve 143 is provided outside the butting end of the X-axis screw 141 and the first pull rod 142 , a shaft sleeve 144 is provided between the connecting sleeve 143 and the X-axis screw 141 , and the connecting sleeve 143 is connected to the first pull rod 142 . Rolling bearings 145 are provided between the ends of the tie rods 142 , and a fastening nut 146 located at the outer end of the rolling bearings 145 is arranged on the ends of the first tie rods 142 .

The transmission connector 140 is divided into an X-axis screw 141 and a first pull rod 142 that are connected in segments, and flexible connections are adopted between each segment and between each segment and the servo motor and other connectors.

In some of the embodiments, the shaft end of the spindle box 100 is provided with two self-centering clamps 200 arranged at intervals, and each centering clamp 200 includes two symmetrically arranged clamps 210 and a slider 220 connected under the two clamps 210 respectively. , a horizontal drive mechanism 230 is also provided, the output end of the horizontal drive mechanism 230 is connected with a second pull rod 231, the second pull rod 231 transversely passes through the two sliders 220, and the second pull rod 231 is located on both sides of one of the sliders 220. There are a left stop block 232 and a right stop block 233, a Z-axis screw rod 240 arranged horizontally is arranged below the two sliders 220, and a positive helical section and a reverse helical section are respectively set on both sides of the Z-axis screw rod 240. A nut 241 that moves with the rotation of the Z-axis screw 240 is respectively installed on the segment and the reverse helical segment, and a nut seat 242 is connected between the nut 241 and the slider 220 .

The forward helical segment and the reverse helical segment have equal pitches and opposite directions of rotation. Driven by the rotation of the Z-axis screw 240 , the nuts 241 on the forward and reverse helical segments are driven to synchronously drive the nut seats 242 on both sides to move synchronously.

In this machine tool structure for static processing, the self-centering fixture 200 holds and clamps the workpiece to be processed through two opposite and symmetrically arranged fixtures 210. During the processing, the horizontal drive mechanism 230 is activated to process workpieces of different sizes and diameters to be processed. , the second pull rod 231 drags the sliders 220 under the two clamps 210 to move toward each other, and the two sliders 220 follow the nut 241 and the nut seat 242 to move toward each other along the Z-axis screw 240, so that the workpiece to be processed is clamped between the two clamps 210. The center can always be in the original position, which can significantly improve the clamping accuracy of the workpiece, and can be suitable for clamping various specifications of bars.

The setting of the self-centering fixture 200 makes the clamping center of the machine tool remain unchanged during the clamping process of bars with different specifications and diameters, so that the turning tool 112 on the servo tool head 110 with the same machining axis can be adjusted. The machining radius can be used for machining of different specifications of bars.

In some of the embodiments, the opposite sides of the clamps 210 are provided with V-shaped holding openings 211 , and spacers 212 are installed on both sides of the V-shaped holding openings 211 . The V-shaped holding openings 211 and The spacers 212 are symmetrically arranged.

The V-shaped holding openings 211 provided on the clamps 210 on both sides are arranged opposite to form a holding jaw, the workpiece to be processed is placed in the holding jaw, and four support points are formed on the workpiece to be processed through the four cushion blocks 212 in the holding jaw, It can keep the workpiece to be processed in a stable clamping state. The V-shaped holding openings 211 and the spacers 212 on both sides are symmetrically arranged, so that when machining the bar parts, the center of the bar parts is always on the symmetry axis of the two oppositely arranged clamps 210, which can maintain the workpieces of different specifications to be processed. Stable grip.

In some of the embodiments, the self-centering clamp 200 further includes a clamp base 250 . Support arms 251 are provided on both sides of the clamp base 250 , the Z-axis screw 240 is erected between the two support arms 251 , and the two support arms 251 Bearings 252 for erecting the Z-axis screw rod 240 are provided on both ends, and locking sleeves 253 are provided at both ends of the Z-axis screw rod 240 .

The Z-axis screw rod 240 is arranged parallel to the sliding direction of the second pull rod 231 and the two sliders 220 , and the Z-axis screw rod 240 and the second pull rod 231 are both set horizontally, so that the entire axis of the fixture and the center of gravity line are vertically downward Alignment can better maintain the overall stability of the fixture when processing the workpiece to be processed. Both ends of the Z-axis screw 240 are locked between the two support arms 251 on the fixture seat 250 through locking sleeves 253, and bearings 252 are provided at both ends to support and be fixed by the locking sleeves 253 to prevent the Z-axis screw 240 is offset during work, which affects the stability of workpiece clamping.

In some of the embodiments, the horizontal drive mechanism 230 is a hydraulic cylinder, the output end of the hydraulic cylinder is provided with a hydraulic shaft, the second pull rod 231 is threadedly connected to the front end of the hydraulic shaft, and the two sliders 220 are provided with pull rod holes. The two tie rods 231 protrude through the two tie rod holes. The outer diameter of the left stop block 232 at the end of the second tie rod 231 is larger than the diameter of the tie rod hole. The two pull rods 231 are threadedly connected to the right stop block 233 , and the right stop block 233 is locked so that the second pull rod 231 and the slider 220 located at the distal end of the second pull rod 231 are relatively fixedly arranged.

The second tie rod 231 is installed on the front end of the hydraulic shaft through a threaded connection, which facilitates the overall assembly of the fixture. The left stop block 232 and the right stop block 233 are respectively installed at both ends of the pull rod hole. When the two clamps 210 move toward or away from each other, the two sliders 220 are driven to slide, so that the second pull rod 231 and the second pull rod 231 are located in the second pull rod 231. The sliders 220 at the distal ends of the two tie rods 231 are relatively fixed, and there will be no movement lag during movement, so that the accuracy will not be affected.

This machine tool structure has two linear coordinate axes, X-axis and Z-axis. The turning tool 112 is moved by the servo expanding tool head 110 through the X-axis servo motor 130 and the X-axis screw 141. The turning tool holder is installed on the servo expanding tool head 110. On the main shaft, the X-axis feed movement is carried out by the servo expanding tool head 110, the turning tool 112 rotates with the main shaft at a high speed, so that the workpiece does not move, the turning tool 112 rotates at a high speed, and feeds at the same time, reaching the outer circle \ end face and inner surface of the turning workpiece. purpose of the hole.

The present invention has the following innovations and advantages:

The present invention adopts the self-centering fixture 200 of the automatic line. After the clamping center height of the self-centering fixture 200 is adjusted to be consistent with the spindle center height, after all workpieces of different sizes and diameters are clamped, the workpiece is automatically concentric with the spindle, and does not need to be calibrated;

In the present invention, the servo expanding tool head 110 is applied to the main shaft, and the X-axis screw 141 is used to drive the servo expanding tool head 110, thereby driving the turning tool 112. The turning tool 112 of the machine tool has high rotational speed, high feeding accuracy, and high processing efficiency;

The invention uses the workpiece to rotate without moving the tool for turning, and is suitable for the end face turning of large parts, extra-long parts, parts with complex shapes, and parts with particularly large turning diameters, and has high processing efficiency and high processing accuracy.

The machine tool that the workpiece does not move and the tool rotates and feeds involved in the patented invention is a new type of machine tool with innovative structure and concept, which can be suitable for particularly long workpiece length, particularly heavy workpiece weight, particularly complex shape, and particularly large turning diameter. The processing of parts and components is economical, energy-saving, high-efficiency and high-precision.

The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments. Within the scope of knowledge possessed by those of ordinary skill in the technical field, various modifications can be made without departing from the purpose of the present invention. kind of change.

Claims (10)

1. a machine tool for static machining of workpiece, is characterized in that: comprise headstock and some self-centering clamps that are arranged at intervals on one side of described headstock, and described headstock is provided with a servo-blade head and a drive unit. The spindle servo motor for the rotation of the servo expanding tool head is provided with a tool adjusting block and a turning tool installed on the tool adjusting block, and an X-axis servo motor and a connecting tool are also provided on the spindle box. A transmission connecting piece between the X-axis servo motor and the servo tool spreading head, the X-axis servo motor drives the transmission connecting piece to drive the tool adjusting block to slide laterally along the servo spreading tool head. The self-centering clamps are provided with two clamps that are symmetrically arranged and can move synchronously toward each other. 2. The machine tool for static machining of workpieces according to claim 1, characterized in that: the machine tool comprises a bed, the bed is provided with a Z-direction guide rail and a Z-axis servo motor, and the spindle box is mounted on the The bed can move along the Z-direction guide rail, and the symmetrical axes of the clamps arranged in the opposite groups are arranged along the Z-direction. 3 . The machine tool for static machining of workpieces according to claim 1 , wherein a motor seat for installing the X-axis servo motor is connected to the tail of the headstock, and the transmission connector comprises a The X-axis screw rod in the motor base and the first pull rod connected between the X-axis screw rod and the servo spreader head. 4 . The machine tool for static machining of workpieces according to claim 3 , wherein the side surfaces of each of the tool adjusting blocks are provided with transmission teeth, and the servo spreader head is installed with gears that engage with the transmission teeth. 5 . The gear of the servo spreader head is also provided with a transmission rod connected with the gear, and the transmission rod extends from the axis of the servo spreader head and is connected to the end of the first pull rod. 5 . The machine tool for static machining of workpieces according to claim 3 , wherein the X-axis screw rod is connected to the output end of the X-axis servo motor through a coupling. 6 . 6 . The machine tool for static machining of workpieces according to claim 3 , wherein a connecting sleeve is provided outside the butting end of the X-axis screw rod and the first pull rod, and the connecting sleeve is connected to the X-axis. 7 . A shaft sleeve is arranged between the shaft screws, a rolling bearing is arranged between the connecting sleeve and the end of the first pull rod, and the end of the first pull rod is provided with a tightening nut located at the outer end of the rolling bearing. 7 . The machine tool for static machining of workpieces according to claim 1 , wherein the shaft end of the spindle box is provided with two self-centering fixtures arranged at intervals, and each of the self-centering fixtures comprises two Symmetrically arranged clamps and sliders respectively connected under the two clamps are also provided with a horizontal drive mechanism, the output end of the horizontal drive mechanism is connected with a second pull rod, and the second pull rod transversely passes through the two sliders. The second pull rod is provided with a left stop block and a right stop block on both sides of one of the sliders, and a horizontally arranged Z-axis screw rod is arranged below the two sliders. Both sides of the shaft screw rod are respectively provided with a positive helical section and a reverse helical section, and a nut that moves with the rotation of the Z-axis screw rod is installed on the positive helical section and the reverse helical section, and the nut and the slider are respectively installed. A nut seat is connected between. 8 . The machine tool for static machining of workpieces according to claim 7 , wherein the opposite sides of the fixture are provided with V-shaped holding openings, and pads are installed on both sides of the V-shaped holding openings. 9 . The V-shaped holding openings and the cushion blocks on the two clamps are symmetrically arranged. 9 . The machine tool for static machining of workpieces according to claim 7 , wherein the self-centering fixture further comprises a fixture seat, and two sides of the fixture seat are provided with support arms, and the Z-axis wire The rod is erected between the two support arms, the two support arms are both provided with bearings for erecting the Z-axis screw rod, and both ends of the Z-axis screw rod are provided with locking sleeves. 10. The machine tool for static machining of workpieces according to claim 7, wherein the horizontal driving mechanism is a hydraulic cylinder, the output end of the hydraulic cylinder is provided with a hydraulic shaft, and the second pull rod is threadedly connected to At the front end of the hydraulic shaft, the two sliders are provided with pull rod holes, the second pull rod protrudes through the two pull rod holes, and the outer diameter of the left stopper at the end of the second pull rod is larger than The hole diameter of the pull rod hole, the other side of the pull rod hole located at the distal end of the second pull rod is provided with a right stop block threadedly connected with the second pull rod, and the right stop block is locked so that all the The second pull rod is relatively fixed to the sliding block located at the distal end of the second pull rod.

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