阅读说明：本技术 一种可防偏定位的数控加工用定心尾座 (Centering tailstock for numerical control machining capable of preventing deviation positioning ) 是由 付炎杰 池宁 于 2021-08-19 设计创作，主要内容包括：本发明公开了一种可防偏定位的数控加工用定心尾座,包括床身,所述床身的内部固定安装有导轨,导轨的顶部滑动连接有尾座体,尾座体的底部固定安装有防偏组件；所述导轨由轨身、支撑座和滑轨组成,床身的内部定安装有轨身,轨身的顶部固定安装有支撑座,支撑座的顶部固定安装有滑轨；所述防偏组件包括滑座、滑架和定位架,尾座体的底部固定安装有滑座,滑座的底部固定安装有滑架,滑架的顶部固定安装有定位架。该可防偏定位的数控加工用定心尾座,滑轨的顶部设置有凸轨和平轨,凸轨和平轨表面光滑,可用于滑座的精密移动,滑轨底部设置的液压杆,液压杆活塞柱的升降可用于推动滑架和滑座的顶部下移,始终保证滑座的底部与滑轨的顶部贴合。(The invention discloses a centering tailstock for numerical control machining capable of preventing deviation positioning, which comprises a lathe bed, wherein a guide rail is fixedly arranged in the lathe bed, the top of the guide rail is connected with a tailstock body in a sliding manner, and the bottom of the tailstock body is fixedly provided with a deviation preventing assembly; the guide rail consists of a rail body, a supporting seat and a slide rail, the rail body is fixedly arranged in the machine body, the supporting seat is fixedly arranged at the top of the rail body, and the slide rail is fixedly arranged at the top of the supporting seat; the anti-deviation assembly comprises a sliding seat, a sliding frame and a positioning frame, the sliding seat is fixedly arranged at the bottom of the tailstock body, the sliding frame is fixedly arranged at the bottom of the sliding seat, and the positioning frame is fixedly arranged at the top of the sliding frame. This numerical control machining that can prevent location partially is with centering tailstock, the top of slide rail is provided with protruding rail and plain rail, and protruding rail and plain rail surface are smooth, can be used to the accurate removal of slide, and the hydraulic stem that the slide rail bottom set up, the lift of hydraulic stem piston post can be used to promote the top of balladeur train and slide and move down, guarantees the bottom of slide and the top laminating of slide rail all the time.)

1. The utility model provides a but numerical control machining of anti-deviation location is with centering tailstock, includes lathe bed (1), its characterized in that: a guide rail (2) is fixedly installed inside the lathe bed (1), the top of the guide rail (2) is connected with a tailstock body (3) in a sliding mode, and the bottom of the tailstock body (3) is fixedly provided with an anti-deviation assembly (4);

the guide rail (2) consists of a rail body (201), a supporting seat (202) and a slide rail (203), the rail body (201) is fixedly installed inside the lathe bed (1), the supporting seat (202) is fixedly installed at the top of the rail body (201), and the slide rail (203) is fixedly installed at the top of the supporting seat (202);

prevent inclined to one side subassembly (4) including slide (401), balladeur train (402) and locating rack (403), the bottom fixed mounting of tailstock body (3) has slide (401), and the bottom fixed mounting of slide (401) has balladeur train (402), and the top fixed mounting of balladeur train (402) has locating rack (403).

2. The centering tailstock for numerical control machining capable of preventing deviation positioning according to claim 1, characterized in that: the front left side of the lathe bed (1) is connected with a protective cover in a sliding mode, a protective window is arranged inside the protective cover, the right front side of the lathe bed (1) is connected with a control cover in a sliding mode, and a data control panel is arranged on the front side of the control cover.

3. The centering tailstock for numerical control machining capable of preventing deviation positioning according to claim 2, characterized in that: the utility model discloses a rail body, including rail body (201), the top fixed mounting of rail body (201) has anticreep rail (2011), the quantity of anticreep rail (2011) is two, and distribute around, the quantity of supporting seat (202) is two, and control the distribution, the left and right sides of two anticreep rail (2011) respectively with the relative one side fixed connection of controlling two supporting seats (202), the bottom of controlling two supporting seats (202) and the top fixed connection of rail body (201), the inside fixed mounting of right side supporting seat (202) has motor (2021), the quantity of motor (2021) is two, and distribute around, fixedly connected with silk axis (2022) on the output shaft of motor (2021).

4. The centering tailstock for numerical control machining capable of preventing deviation positioning according to claim 1, characterized in that: the utility model discloses a slide rail (203) for the car, including slide rail (203), the top fixed connection of two supporting seats (202) about the bottom left and right sides respectively, the top of slide rail (203) is provided with protruding rail (2031) and flat rail (2032), the length that has protruding rail (2031) and flat rail (2032) is unanimous with the length of slide rail (203), protruding rail (2031) is located the intermediate position at slide rail (203) top, the quantity of flat rail (2032) is two, and distribute around, the highly uniform of two front and back flat rails (2032), the bottom of slide (401) can slide on protruding rail (2031) and flat rail (2032).

5. The centering tailstock for numerical control machining capable of preventing deviation positioning according to claim 1, characterized in that: the bottom of slide rail (203) is provided with hydraulic stem (2033), and the quantity of hydraulic stem (2033) is three, and is the equidistance distribution from a left side to the right side, and is three the bottom fixed mounting of hydraulic stem (2033) has the slide, and the bottom of slide is laminated with the top of slide (401).

6. The centering tailstock for numerical control machining capable of preventing deviation positioning according to claim 1, characterized in that: the top of slide (401) and the bottom fixed connection of tailstock body (3), the spout has been seted up to the bottom of slide (401), and the spout is the recess, and the spout corresponds with protruding rail (2031), and the spout can slide on protruding rail (2031), and both sides can slide on two flat rails (2032) in the front and back of the bottom of slide (401).

7. The centering tailstock for numerical control machining capable of preventing deviation positioning according to claim 3, characterized in that: the utility model discloses a railway carriage with the slip of preventing derailment of railway carriage (2011) is characterized in that balladeur train (402) is the U-shaped, both sides fixed connection around the front and back both sides of balladeur train (402) respectively with the bottom of slide (401), one side that slide (401) were kept away from in balladeur train (402) is located between rail body (201) and slide rail (203), the anticreep groove has been seted up to the bottom of balladeur train (402), anticreep groove quantity is two, two anticreep grooves and two corresponding and sliding connection of anticreep rail (2011), the bottom of balladeur train (402) is rotated and is connected with pulley (4021), pulley (4021) are located the inside in the anticreep groove, the opposite side of pulley (4021) can slide in the inside of anticreep rail (2011).

8. The centering tailstock for numerical control machining capable of preventing deviation positioning according to claim 1, characterized in that: the quantity of locating rack (403) is four, two adjacent are a set of in front and back, two sets of locating racks (403) are left and right to be distributed, left side locating rack (403) are located the inside of left side supporting seat (202), the right side of left side locating rack (403) is laminated with the right side of left side supporting seat (202), right side locating rack (203) are located the left side of right side supporting seat (202) and are located the top of balladeur train (402), locating rack (403) comprise fixed seat (4031) and slider (4032), the inside of fixed seat (4031) communicates with each other with the left and right sides of fixed seat (4032), the inside sliding connection of fixed seat (4031) has slider (4032).

9. The centering tailstock for numerical control machining capable of preventing deviation positioning according to claim 8, characterized in that: the screw shaft (2022) penetrates through the right side sliding block (4032) and extends to the interior of the left side sliding block (4032), the connection relationship between the screw shaft (2022) and the right side sliding block (4032) is a threaded connection, and the connection relationship between the screw shaft (2022) and the left side sliding block (4032) is a rotary connection.

Technical Field

The invention relates to the technical field of numerical control machining, in particular to a centering tailstock for numerical control machining, which can prevent deviation and positioning.

Background

The numerical control machining is a machining method for machining parts on a numerical control machine tool, wherein the machining procedures of the numerical control machine tool and the traditional machine tool are generally consistent but obviously changed, and the displacement of the parts and a cutter is controlled by digital information.

The existing numerical control machining is wide in application, the problems of variable part varieties, small batch, complex shape, high precision and the like can be solved, the problems of the existing numerical control machining are solved, before the workpiece is machined, the workpiece needs to be positioned in a centering mode, the clamping stability and position centering of the workpiece are guaranteed, the machining process is avoided, machining size deviation can be caused due to eccentricity, but the existing centering tailstock is heavy in body quality, the workpiece is not easy to move, after the workpiece is moved on a guide rail for a long time, shaking and deviation can be caused due to abrasion, scrap iron generated by the existing workpiece machining is not easy to process on the guide rail, and then the scrap iron generates scratches on the guide rail, the precision of the movement of the centering tailstock is influenced, and the requirement of numerical control machining is difficult to meet, so that the centering tailstock for numerical control machining capable of preventing the eccentric positioning is provided to solve the problems.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides the centering tailstock for numerical control machining, which can prevent deviation positioning, has the advantages of convenience in movement, deviation prevention and clearance compensation, and solves the problems that the existing centering tailstock is heavy in body weight, not easy to move, can shake and generate deviation due to abrasion after moving on a guide rail for a long time, scrap iron generated by processing the existing workpiece is not easy to process on the guide rail, the scrap iron scratches the guide rail, and the moving precision of the centering tailstock is influenced.

In order to achieve the purpose, the invention provides the following technical scheme: a centering tailstock capable of preventing deviation positioning for numerical control machining comprises a lathe bed, wherein a guide rail is fixedly arranged in the lathe bed, the top of the guide rail is connected with a tailstock body in a sliding mode, and a deviation preventing assembly is fixedly arranged at the bottom of the tailstock body;

the guide rail consists of a rail body, a supporting seat and a slide rail, the rail body is fixedly arranged in the machine body, the supporting seat is fixedly arranged at the top of the rail body, and the slide rail is fixedly arranged at the top of the supporting seat;

the anti-deviation assembly comprises a sliding seat, a sliding frame and a positioning frame, the sliding seat is fixedly arranged at the bottom of the tailstock body, the sliding frame is fixedly arranged at the bottom of the sliding seat, and the positioning frame is fixedly arranged at the top of the sliding frame.

Further, the front left side of the lathe bed is connected with a protective cover in a sliding mode, a protective window is arranged inside the protective cover, the right front side of the lathe bed is connected with a control cover in a sliding mode, and the front side of the control cover is provided with a data control board.

Further, the rail body is located the rear side of protection casing and control cover, and the top fixed mounting of rail body has the anticreep rail, and the quantity of anticreep rail is two, and distributes around and, and the quantity of supporting seat is two, and controls the distribution, and the left and right sides of two anticreep rails respectively with control the relative one side fixed connection of two supporting seats, control the bottom of two supporting seats and the top fixed connection of rail body, the inside fixed mounting of right side supporting seat has the motor, and the quantity of motor is two, and distributes around and, fixedly connected with silk axle on the output shaft of motor.

Further, the bottom left and right sides of slide rail respectively with the top fixed connection of controlling two supporting seats, the top of slide rail is provided with protruding rail and flat rail, has the length of protruding rail and flat rail unanimous with the length of slide rail, protruding rail is located the intermediate position at slide rail top, the quantity of flat rail is two, and front and back distribution, the highly unanimous of two front and back flat rails, the bottom of slide can slide on protruding rail and flat rail.

Further, the bottom of slide rail is provided with the hydraulic stem, and the quantity of hydraulic stem is three, and is the equidistance from a left side to the right side and distributes, and is three the bottom fixed mounting of hydraulic stem has the slide, and the bottom of slide and the top laminating of slide.

Further, the top of slide and the bottom fixed connection of tailstock body, the spout has been seted up to the bottom of slide, and the spout is the recess, and the spout corresponds with the convex rail, and the spout can slide on the convex rail, and both sides can slide on two flat rails in the front and back around the bottom of slide.

Further, the balladeur train is the U-shaped, both sides around the balladeur train respectively with the bottom of slide around both sides fixed connection, one side that the slide was kept away from to the balladeur train is located between rail body and the slide rail, the anticreep groove has been seted up to the bottom of balladeur train, anticreep groove quantity is two, two anticreep grooves and two corresponding and sliding connection of anticreep rail, the bottom of balladeur train is rotated and is connected with the pulley, the pulley is located the inside in anticreep groove, the opposite side of pulley can slide in the inside of anticreep rail.

Further, the quantity of locating rack is four, and adjacent two are a set of around, and two sets of locating racks control the distribution, and the left side locating rack is located the inside of left side supporting seat, and the right side of left side locating rack is laminated mutually with the right side of left side supporting seat, and the right side locating rack is located the left side of right side supporting seat and is located the top of balladeur train, and the locating rack comprises seat and slider by deciding, and the inside of deciding the seat communicates with each other with the left and right sides of deciding the seat, and the inside sliding connection who decides the seat has the slider.

Furthermore, the screw shaft penetrates through the right side sliding block and extends into the left side sliding block, the connection relation between the screw shaft and the right side sliding block is in threaded connection, and the connection relation between the screw shaft and the left side sliding block is in rotary connection.

Compared with the prior art, the invention provides the centering tailstock for numerical control machining, which can prevent deviation and positioning and has the following beneficial effects:

1. the centering tailstock for numerical control machining capable of preventing deviation positioning comprises a lathe bed, the lathe bed can be used for providing a basis for numerical control machining through the arranged lathe bed, workpieces can be conveniently turned on the lathe bed, the guide rail can serve as a rail platform to enable equipment to slide on the guide rail and play a role of conveying equipment, the guide rail comprises a rail body, a supporting seat and a slide rail, the rail body plays a supporting basis, the number of the supporting seats is two, the supporting seats are distributed leftwards and rightwards and can play a bearing role, the surface of the slide rail is smooth, the equipment can precisely slide on the surface of the slide rail, the tailstock body can be used for centering the workpieces through the arranged tailstock body, the deviation preventing component is connected with the bottom of the tailstock body and is connected with the tailstock body, the deviation preventing component is connected with the tailstock body to slide on the guide rail, the moving balance of the tailstock body is ensured, the deviation preventing component comprises a sliding frame, a sliding frame and a positioning frame, the sliding seat is connected with the bottom of the tailstock body, and the slide can slide on the slide rail, can play connection and slip effect, and the balladeur train is connected with the slide and is located between slide rail and the rail body, can be used to spacing slide, and the locating rack can be used to remove the location, guarantees to move steadily.

2. The centering tailstock for numerical control processing capable of preventing deviation positioning is characterized in that a deviation preventing rail is arranged on a rail body, the deviation preventing rail is positioned at the bottom of a sliding frame and is used for preventing the sliding frame from falling off easily in the sliding process, a motor and a screw shaft are arranged on a supporting seat and can rotate by matching with the motor, a positioning frame is in threaded connection with the screw shaft and can be used for moving and feeding the positioning frame so as to drive a deviation preventing component and a tailstock body to move, a convex rail and a flat rail are arranged at the top of the sliding rail, the surfaces of the convex rail and the flat rail are smooth and can be used for precise movement of a sliding seat, the convex rail is positioned between the front flat rail and the rear flat rail, so that scrap iron can be dispersed from the middle to two sides under the flushing of cooling liquid conveniently, the condition that the existing scrap iron is difficult to clean on the guide rail is avoided, a hydraulic rod is arranged at the bottom of the sliding rail, the lifting of a hydraulic rod piston column can be used for pushing the sliding frame and the top of the sliding seat to move downwards, and the bottom of the sliding seat is always attached to the top of the sliding seat, the gap is compensated.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic cross-sectional view of the present invention;

FIG. 3 is a schematic view of the structure of the guide rail of the present invention;

FIG. 4 is a right side view schematic diagram of the guide rail and the tailstock body according to the present invention;

FIG. 5 is an enlarged view of the right side of the stationary base according to the present invention.

In the figure: 1 lathe bed, 2 guide rails, 201 rail bodies, 2011 derailment prevention rail, 202 supporting seats, 2021 motors, 2022 screw shafts, 203 sliding rails, 2031 convex rails, 2032 flat rails, 2033 hydraulic rods, 3 tail seat bodies, 4 deviation prevention assemblies, 401 sliding seats, 402 sliding seats, 4021 pulleys, 403 positioning frames, 4031 fixed seats and 4032 sliding blocks.

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. 1-5, a centering tailstock for numerical control machining capable of preventing deviation positioning comprises a lathe bed 1, the lathe bed 1 is arranged to provide a basis for numerical control machining through the lathe bed 1, so as to facilitate the machining and turning of a workpiece on the lathe bed 1, a guide rail 2 is fixedly arranged inside the lathe bed 1, the guide rail 2 is arranged on the lathe bed 1 and can serve as a rail platform, so that equipment can slide on the guide rail 2 to play a role of conveying equipment, the guide rail 2 is composed of a rail body 201, a supporting seat 202 and a sliding rail 203, the rail body 201 serves as a supporting base, the supporting seats 202 are two in number and distributed in the left and right direction to play a role of bearing, the sliding rail 203 has a smooth surface, so that the equipment can precisely slide on the surface, the top of the guide rail 2 is slidably connected with a tailstock body 3, the tailstock body 3 can be used for centering the workpiece through the tailstock body 3, the bottom of the tailstock body 3 is fixedly provided with a deviation preventing assembly 4, through the arranged deviation preventing component 4, the deviation preventing component 4 is connected with the bottom of the tailstock body 3, the deviation preventing component 4 is connected with the tailstock body 3 and slides on the guide rail 2, so that the moving balance of the tailstock body 3 is ensured, the deviation preventing component 4 consists of a sliding seat 401, a sliding frame 402 and a positioning frame 403, the sliding seat 401 is connected with the bottom of the tailstock body 3, the sliding seat 401 can slide on the guide rail 203 and can play a role in connection and sliding, the sliding frame 402 is connected with the sliding seat 401 and is positioned between the guide rail 203 and the rail body 201 and can be used for limiting the sliding seat 401, and the positioning frame 403 can be used for moving and positioning, so that the stable movement is ensured;

the guide rail 2 consists of a rail body 201, a supporting seat 202 and a slide rail 203, the rail body 201 is fixedly installed inside the lathe bed 1, the supporting seat 202 is fixedly installed at the top of the rail body 201, and the slide rail 203 is fixedly installed at the top of the supporting seat 202;

the anti-deviation assembly 4 comprises a sliding seat 401, a sliding seat 402 and a positioning frame 403, the sliding seat 401 is fixedly installed at the bottom of the tailstock body 3, the sliding seat 402 is fixedly installed at the bottom of the sliding seat 401, the positioning frame 403 is fixedly installed at the top of the sliding seat 402, an anti-deviation rail 2011 is arranged on the rail body 201 and is positioned at the bottom of the sliding seat 402 and used for preventing the sliding seat 402 from falling off easily in the sliding process, a motor 2021 and a screw spindle 2022 are arranged on the supporting seat 202, the screw spindle 2022 can rotate by matching with the motor 2021, the positioning frame 403 is in threaded connection with the screw spindle 2022 and can be used for moving and feeding of the positioning frame 403 so as to drive the anti-deviation assembly 4 and the tailstock body 3 to move, a convex rail 2031 and a flat rail 2032 are arranged at the top of the sliding rail 203, the surfaces of the convex rail 2031 and the flat rail 2032 are smooth and can be used for precise movement of the rail 401, the convex rail 2031 is positioned between the front and the back two flat rails 2032, scrap iron can be dispersed from the middle to two sides under the flushing of cooling liquid conveniently, avoid current iron fillings difficult clearance on guide rail 2, the hydraulic stem 2033 that the slide rail 203 bottom set up, the lift of hydraulic stem 2033 piston post can be used to promote the top of balladeur train 402 and slide 401 and move down, guarantees the bottom of slide 401 and the top laminating of slide rail 203, compensation clearance all the time.

Moreover, this but numerical control that prevents inclined to one side location is with centering tailstock, utilize slide 401 and slide 203 to cooperate, when guaranteeing that can move precisely, can make iron fillings clear up fast, reduce the mar of iron fillings to slide 203, utilize the balladeur train 402 to be connected with slide 401, and balladeur train 402 is located between slide 203 and the rail body 201, guarantee that balladeur train 402 slides between slide 203 and rail body 201, play the limiting displacement, hydraulic stem 2033 can promote one side of preventing inclined to one side of the inside of subassembly 4 and laminate all the time at the top of slide 203, avoid rocking, do benefit to and reduce the wearing and tearing clearance of clearance deviation prevention subassembly 4, locating rack 403 comprises positioning seat 4031 and slider 4032, slider 4032 cooperates wire shaft 2022 can be used for the motion feed of deviation prevention subassembly 4 and tailstock body 3, and slider 4032 slides on stationary 4031, can be used for the synchronous lift after hydraulic stem 2033 compensates the clearance of deviation prevention subassembly 4.

When in implementation, the method comprises the following steps:

1) the motor 2021 is started to drive the screw shaft 2022 to rotate and act on the sliding block 4032, the sliding block 4032 drives the fixed seat 4031 and the sliding frame 402 to slide on the derailment 2011, and the pulley 4021 at the bottom of the sliding frame 402 moves synchronously, so that the movement balance is improved;

2) the sliding frame 402 drives the sliding seat 401 to slide on the sliding rail 203, the sliding seat 401 drives the tailstock body 3 connected with the sliding seat to synchronously move, and the movement of the tailstock body 3 can be used for centering after a workpiece is clamped.

In summary, the anti-deviation positioning centering tailstock for numerical control machining can be characterized in that the lathe bed 1 is arranged, the lathe bed 1 can be used for providing a basis for numerical control machining, and a workpiece can be conveniently machined and turned on the lathe bed 1, the guide rail 2 arranged on the lathe bed 1 can be used as a rail platform, so that equipment can slide on the guide rail 2 to play a role of conveying equipment, the guide rail 2 is composed of a rail body 201, a supporting seat 202 and a slide rail 203, the rail body 201 plays a supporting role, the number of the supporting seats 202 is two, the supporting seats are distributed leftwards and rightwards and can play a bearing role, the surface of the slide rail 203 is smooth, so that the equipment can precisely slide on the surface of the guide rail, the tailstock body 3 can be used for centering the workpiece through the arranged tailstock body 3, the anti-deviation assembly 4 is connected with the bottom of the tailstock body 3 through the arranged anti-deviation assembly 4, the anti-deviation assembly 4 is connected with the tailstock body 3 and slides on the guide rail 2, so as to ensure the moving balance of the tailstock body 3, the deviation prevention assembly 4 comprises a sliding seat 401, a sliding seat 402 and a positioning frame 403, the sliding seat 401 is connected with the bottom of the tailstock body 3, the sliding seat 401 can slide on the sliding rail 203, the connection and sliding effects can be achieved, the sliding seat 402 is connected with the sliding seat 401 and located between the sliding rail 203 and the rail body 201, the sliding seat 401 can be used for limiting, and the positioning frame 403 can be used for moving and positioning, so that the stable movement is guaranteed.

Moreover, through the anti-derailing 2011 arranged on the rail body 201, the anti-derailing 2011 is positioned at the bottom of the carriage 402 and is used for preventing the carriage 402 from easily falling off in the sliding process, the motor 2021 and the screw spindle 2022 arranged on the supporting seat 202, the screw spindle 2022 can realize rotation by matching with the motor 2021, the positioning frame 403 is in threaded connection with the screw spindle 2022 and can be used for moving and feeding of the positioning frame 403 so as to drive the anti-deviation component 4 and the tailstock body 3 to move, the top of the sliding rail 203 is provided with a convex rail 2031 and a flat rail 2032, the surfaces of the convex rail 2031 and the flat rail 2032 are smooth and can be used for precise movement of the sliding seat 401, the convex rail 1 is positioned between the front and the rear flat rails 2032, so that iron chips can be conveniently dispersed from the middle to two sides under the flushing of cooling liquid, the existing iron chips are prevented from being easily cleaned on the sliding rail 2, the hydraulic rod 2033 arranged at the bottom of the sliding rail 203, the lifting 203of a piston column of the hydraulic rod 3 can be used for pushing the tops of the sliding seat 402 and the sliding rail 203 to be always moved downwards to ensure that the tops of the sliding seat 401 are attached to the top of the sliding rail 203, compensating the clearance, having solved current centering tailstock, its body quality is heavier, and is difficult for removing, and on the guide rail after long-term removal, can lead to rocking and producing the skew because of wearing and tearing, iron fillings jump that current work piece processing produced are difficult for handling on the guide rail, and then make iron fillings produce the mar to the guide rail, influence the problem of the precision that centering tailstock removed.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.