阅读说明：本技术 一种高加工精度的立柱移动式数控磨床 (Portable numerically control grinder of stand of high machining precision ) 是由 李卫东 于 2021-09-26 设计创作，主要内容包括：本申请涉及一种高加工精度的立柱移动式数控磨床,其包括机体、扩容立柱、低承台和工作台；所述低承台设置于机体一侧,所述工作台滑动设置于低承台上表面；所述扩容立柱滑动设置于机体上表面,所述扩容立柱外侧壁且位于工作台上方设置有用于磨削工件的磨头体；所述磨头体靠近扩容立柱的一端设置有连接板,所述扩容立柱与连接板共同设置有控制连接板沿纵向位移的驱动组件；所述扩容立柱外侧壁设置有导振块,所述机体上表面且位于导振块下方设置有支撑板,所述导振块与支撑板共同设置有卸力组件,所述导振块与扩容立柱共同设置有固定组件。本申请具有有效提高磨床对工件的加工精度的效果。(The application relates to a high-machining-precision upright post movable numerical control grinding machine which comprises a machine body, an expansion upright post, a low bearing platform and a workbench; the low bearing platform is arranged on one side of the machine body, and the workbench is arranged on the upper surface of the low bearing platform in a sliding manner; the expansion upright post is arranged on the upper surface of the machine body in a sliding manner, and a grinding head body for grinding a workpiece is arranged on the outer side wall of the expansion upright post and above the workbench; one end of the grinding head body, which is close to the expansion upright post, is provided with a connecting plate, and the expansion upright post and the connecting plate are provided with a driving assembly for controlling the connecting plate to move along the longitudinal direction; the dilatation stand lateral wall is provided with leads the piece that shakes, the organism upper surface just is located leads the piece below of shaking and is provided with the backup pad, lead the piece that shakes and be provided with jointly with the backup pad and unload the power subassembly, lead the piece that shakes and be provided with fixed subassembly jointly with the dilatation stand. This application has the effect that effectively improves the machining precision of grinding machine to the work piece.)

1. The utility model provides a portable numerically control grinder of stand of high machining precision which characterized in that: comprises a machine body (1), an expansion upright post (11), a low bearing platform (2) and a workbench (21); the low bearing platform (2) is arranged on one side of the machine body (1), and the workbench (21) is arranged on the upper surface of the low bearing platform (2) in a sliding manner; the expansion upright post (11) is arranged on the upper surface of the machine body (1) in a sliding manner, and a grinding head body (111) for grinding a workpiece is arranged on the outer side wall of the expansion upright post (11) and above the workbench (21); a connecting plate (112) is arranged at one end, close to the expansion upright column (11), of the grinding head body (111), and a driving assembly (3) for controlling the longitudinal displacement of the connecting plate (112) is arranged on the expansion upright column (11) and the connecting plate (112) together; the outer side wall of the expansion upright post (11) is provided with a vibration guide block (12), a support plate (14) is arranged on the upper surface of the machine body (1) and below the vibration guide block (12), and the vibration guide block (12) and the support plate (14) are jointly provided with a force unloading assembly (7); the vibration guide block (12) and the expansion upright post (11) are jointly provided with a fixing component (5), and the fixing component (5) comprises an outer connecting plate (51), a tightening piece (52) and a fixing bolt (53); outer fishplate bar (51) set up in leading and shake piece (12) lateral wall, it sets up in outer fishplate bar (51) towards the lateral wall of dilatation stand (11) to support piece (52), fixing bolt (53) are used for outer fishplate bar of fixed connection (51) and dilatation stand (11).

2. The column movable numerically controlled grinder with high processing precision as claimed in claim 1, wherein: the driving assembly (3) comprises a driving motor (31), a guide screw rod (32), a sliding sleeve (33) and a bearing seat (34), the driving motor (31) is arranged on the side wall, far away from the machine body (1), of the capacity expansion upright column (11), and the guide screw rod (32) is arranged at one end, facing the machine body (1), of the output end of the driving motor (31); the bearing seat (34) is arranged on the outer side wall of the expansion upright post (11), and one end, far away from the driving motor (31), of the guide screw rod (32) is rotatably arranged in the inner cavity of the bearing seat (34); the sliding sleeve (33) is arranged on the side wall of the connecting plate (112) facing the expansion upright post (11), and the sliding sleeve (33) is in threaded fit with the outer edge of the guide screw rod (32).

3. The column movable numerically controlled grinder with high processing precision as claimed in claim 2, wherein: the connecting plate (112) and the expansion upright post (11) are provided with an orientation assembly (4) together, and the orientation assembly (4) comprises an orientation strip (41), a butt joint sleeve (42) and an anti-deviation strip (43); the orientation strip (41) is arranged on the outer side wall of the expansion upright post (11), and the butt joint sleeve (42) is arranged on the side wall of the connecting plate (112) facing the expansion upright post (11); directional strip (41) outside is located to butt joint cover (42) cover, prevent inclined to one side strip (43) and set up in butt joint cover (42) inside wall, directional strip (41) lateral wall is provided with along vertical running through and supplies abdicating hole (411) that inclined to one side strip (43) supported.

4. The column movable numerically controlled grinder with high processing precision as claimed in claim 1, wherein: the lateral wall of leading vibration piece (12) to keep away from dilatation stand (11) is provided with and predetermines groove (121), lead vibration piece (12) and be provided with polylith gusset plate (122) in predetermineeing groove (121) interval.

5. The column movable numerically controlled grinder with high processing precision as claimed in claim 1, wherein: the side wall of the vibration guide block (12) facing the expansion upright post (11) is provided with a shock absorption piece (13), and a plurality of groups of deformation cavities (131) are arranged in the shock absorption piece (13) at intervals.

6. The column movable numerically controlled grinder with high processing precision as claimed in claim 5, wherein: the abutment (52) comprises a plurality of sets of compression springs (521) and abutment plates (522); all the compression springs (521) are arranged on the side wall, facing the expansion upright post (11), of the outer connecting plate (51), and the abutting plate (522) is arranged at one end, away from the outer connecting plate (51), of all the compression springs (521).

7. The column movable numerically controlled grinder with high processing precision as claimed in claim 6, wherein: the abutting plate (522) and the external connecting plate (51) are provided with a protection assembly (6) together, and the protection assembly (6) comprises a clamping cylinder (61), a preset rod (62) and a limiting block (63); the preset rod (62) is arranged on the side wall of the outer connecting plate (51) facing the abutting plate (522), the clamping cylinder (61) is arranged on the side wall of the abutting plate (522) facing the outer connecting plate (51), and the limiting block (63) is arranged in the inner cavity of the clamping cylinder (61); one end of the preset rod (62) close to the outer connecting plate (51) is positioned in the inner cavity of the clamping cylinder (61).

8. The column movable numerically controlled grinder with high processing precision as claimed in claim 1, wherein: the force unloading assembly (7) comprises a base support sleeve (71), a positioning strip (72) and a special-shaped strip (73); the positioning strip (72) is arranged on the side wall of the support plate (14) facing the vibration guide block (12), and the special-shaped strip (73) is arranged on the side wall of the positioning strip (72) facing the vibration guide block (12); the bottom support sleeve (71) is arranged on the side wall, facing the supporting plate (14), of the vibration guide block (12), and the bottom support sleeve (71) is sleeved outside the special-shaped strip (73).

9. The column movable numerically controlled grinder with high processing precision as claimed in claim 8, wherein: the bottom support sleeve (71) and the vibration guide block (12) are jointly provided with a connecting assembly (8), and the connecting assembly (8) comprises a connecting screw rod (81) and a clamping nut (82); the connecting screw rod (81) is arranged on the side wall, facing the vibration guide block (12), of the bottom support sleeve (71), one end, close to the vibration guide block (12), of the connecting screw rod (81) penetrates through the vibration guide block (12), and the clamping and fixing nut (82) is in threaded fit with the outer edge of the connecting screw rod (81).

Technical Field

The application relates to the field of grinding machines, in particular to a column movable type numerical control grinding machine with high machining precision.

Background

At present, a grinding machine generally refers to a machine tool for grinding a surface of a workpiece by means of a grinding tool. In the machining process of the grinding machine, an operator places a workpiece to be ground on a working platform of the grinding machine, and the grinding head is rotated at a high speed by the grinding machine, so that the grinding head grinds the workpiece, and the effect of quickly grinding the surface layer of the workpiece is achieved.

Chinese patent No. CN102085632B discloses a high-precision grinding machine, which comprises a machine body. The lathe bed includes adjacent preceding lathe bed and back lathe bed, and preceding lathe bed upper surface installs swivel work head, and back lathe bed upper surface is provided with the removal stand. The outer side wall of the movable upright post is provided with a supporting plate, one end of the supporting plate, which is far away from the movable upright post, is provided with an indexing mechanism, and one end of the indexing mechanism, which is far away from the supporting plate, is provided with a grinding head. The grinding head is positioned above the rotary worktable. After an operator places a workpiece to be machined on the upper surface of the rotary worktable, the grinding head rotates at a high speed to grind the workpiece, and all positions of the workpiece can be uniformly ground along with the rotation of the rotary worktable.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: the grinding head can generate a vibration acting force with certain strength when rotating at a high speed, the vibration acting force is easily resonated with the upright post after being transmitted to the upright post, and then the grinding head is easily vibrated on a ground workpiece, so that the processing precision of the grinding machine on the workpiece is reduced.

Disclosure of Invention

In order to improve the problem that the machining precision of the grinding machine to the workpiece is low, the application provides a movable numerical control grinding machine for an upright column with high machining precision.

The application provides a portable numerically control grinder of stand of high machining precision adopts following technical scheme:

a high-machining-precision upright column movable numerical control grinding machine comprises a machine body, an expansion upright column, a low bearing platform and a workbench; the low bearing platform is arranged on one side of the machine body, and the workbench is arranged on the upper surface of the low bearing platform in a sliding manner; the expansion upright post is arranged on the upper surface of the machine body in a sliding manner, and a grinding head body for grinding a workpiece is arranged on the outer side wall of the expansion upright post and above the workbench; one end of the grinding head body, which is close to the expansion upright post, is provided with a connecting plate, and the expansion upright post and the connecting plate are provided with a driving assembly for controlling the connecting plate to move along the longitudinal direction; the outer side wall of the expansion upright post is provided with a vibration guide block, the upper surface of the machine body and below the vibration guide block are provided with a support plate, and the vibration guide block and the support plate are jointly provided with a force unloading assembly; the vibration guide block and the expansion upright column are jointly provided with a fixing assembly, and the fixing assembly comprises an outer connecting plate, a propping piece and a fixing bolt; the outer fishplate bar sets up in leading the piece lateral wall that shakes, the piece that supports sets up in the lateral wall of outer fishplate bar towards the dilatation stand, fixing bolt is used for outer fishplate bar of fixed connection and dilatation stand.

By adopting the technical scheme, the height size of the low bearing platform is smaller than that of the machine body, the driving assembly controls the grinding head body to move up and down along the height direction of the expansion upright post through the connecting plate, and therefore the grinding head body can conveniently slide down to the middle position between the expansion upright post and the machine body; at the moment, the grinding head body is positioned at the stress balance position of the expansion upright post and the machine body, and the influence of the vibration acting force generated by the grinding head body on the expansion upright post is small, so that the resonance phenomenon of the grinding head body and the expansion upright post is effectively reduced, and the processing precision of the equipment on the workpiece is guaranteed; meanwhile, the volume of the expansion upright column is far larger than that of the grinding head body, so that the conduction area of the vibration acting force on the expansion upright column is increased, the influence of the vibration acting force on the expansion upright column is reduced, and the phenomena of mutual influence and resonance of the grinding head body and the expansion upright column are further reduced; the vibration guide block further improves the position stability of the expansion stand column through self weight, and meanwhile, the vibration guide block can provide stable lateral support for the expansion stand column, so that the phenomena of loosening and deflection of the expansion stand column under the influence of vibration acting force are reduced, the outward conduction speed of the vibration acting force is accelerated, and the position stability and the use stability of the expansion stand column are further guaranteed; the force unloading assembly is used for further accelerating the outward conduction speed of the vibration acting force, so that the position stability of the expansion upright column is further ensured, the phenomenon that the grinding head body and the expansion upright column resonate and generate vibration lines on the workpiece is reduced, and the machining precision of the grinding machine on the workpiece is ensured; the external connection plate increases the contact area between the vibration guide block and the expansion stand column, the external connection plate is quickly and fixedly connected with the expansion stand column through the fixing bolt, so that the vibration guide block is quickly fixed on the outer side wall of the expansion stand column, and an operator can conveniently and quickly detach the vibration guide block to maintain and replace the vibration guide block; the abutting piece improves the connection strength of the outer connecting plate and the expansion upright post, and ensures the connection strength and connection tightness of the vibration guide block and the expansion upright post.

Preferably, the driving assembly comprises a driving motor, a guide screw rod, a sliding sleeve and a bearing seat, the driving motor is arranged on the side wall of the expansion upright column far away from the machine body, and the guide screw rod is arranged at one end, facing the machine body, of the output end of the driving motor; the bearing block is arranged on the outer side wall of the expansion upright post, and one end of the guide screw rod, which is far away from the driving motor, is rotatably arranged in the inner cavity of the bearing block; the sliding sleeve is arranged on the side wall of the connecting plate facing the expansion stand column, and is in threaded fit with the outer edge of the guide screw rod.

By adopting the technical scheme, the driving motor rotates forwards to enable the guide screw rod to rotate clockwise, so that the sliding sleeve drives the connecting plate and the grinding head body to move downwards to the designated position to process a workpiece; when the driving motor rotates reversely to enable the guide screw rod to rotate anticlockwise, the sliding sleeve drives the connecting plate and the grinding head to move upwards, at the moment, the workbench can move along the length direction of the low bearing platform, and the expansion upright post can also move along the length direction of the machine body, so that the grinding head body can process at different positions of a workpiece; meanwhile, the vibration guide block also moves along with the expansion upright column so as to effectively slow down the conduction of the vibration acting force on the expansion upright column and ensure the processing precision of the grinding head body on the workpiece.

Preferably, the connecting plate and the expansion upright column are provided with an orientation assembly together, and the orientation assembly comprises an orientation strip, a butt joint sleeve and an anti-deviation strip; the orientation strip is arranged on the outer side wall of the capacity expansion upright post, and the butt joint sleeve is arranged on the side wall of the connecting plate facing the capacity expansion upright post; the butt joint sleeve is arranged outside the orientation strip, the deviation prevention strip is arranged on the inner side wall of the butt joint sleeve, and a yielding hole for the deviation prevention strip to abut into is longitudinally arranged on the outer side wall of the orientation strip in a penetrating mode.

By adopting the technical scheme, the butt-joint sleeve is sleeved outside the orientation strip and slides to limit the position of the connecting plate relative to the expansion upright column, ensure the position stability of the connecting plate and the grinding head body during displacement and ensure the machining precision of the grinding head body on a workpiece; the deviation-preventing strip is abutted into the inner cavity of the abdicating hole so as to limit the position of the butt joint sleeve relative to the orientation strip, thereby reducing the phenomena of loosening and deviation of the butt joint sleeve on the orientation strip and further ensuring the processing precision of the grinding head body on the workpiece.

Preferably, the side wall of leading the piece that shakes and keeping away from the dilatation stand is provided with the preliminary groove, it is provided with the polylith gusset plate to lead the piece that shakes in preliminary inslot interval.

Through adopting above-mentioned technical scheme, the gusset plate separates the independent cavity of certain quantity in predetermineeing the groove inner chamber, has increased the conduction degree of difficulty of vibration effort on leading the piece that shakes, has slowed down the further conduction of vibration effort, has ensured the positional stability and the stability in use of dilatation stand, and then has reduced the phenomenon of bistrique body and dilatation stand resonance.

Preferably, the side wall of the vibration guide block facing the expansion stand column is provided with a vibration damping piece, and a plurality of groups of deformation cavities are arranged in the vibration damping piece at intervals.

By adopting the technical scheme, the shock absorption piece is tightly propped between the vibration guide block and the expansion stand column through the characteristic of flexibility and easy deformation of the shock absorption piece, so that the connection tightness of the vibration guide block and the expansion stand column is improved; meanwhile, the shock absorption piece can absorb part of the vibration acting force so as to reduce the conduction strength of the vibration acting force on the expansion upright column and improve the use stability of the expansion upright column; the deformation cavity makes the bradyseism piece become more soft, and then can effectively reduce the connection space between vibration guide block and the dilatation stand, has improved the outer efficiency of passing when vibration effort passes through vibration guide block and outwards conducts.

Preferably, the abutting piece comprises a plurality of groups of compression springs and abutting plates; all compression spring sets up in the lateral wall of outer fishplate bar towards the dilatation stand, the butt joint board sets up in the one end that outer fishplate bar was kept away from to all compression spring.

By adopting the technical scheme, the compression spring reacts on the fixing bolt through self compression deformation, so that the fixing bolt is tensioned between the external connection plate and the expansion stand column, the contact area between the compression spring and the expansion stand column is increased by the butt plate, the positioning stability of the external connection plate on the outer side wall of the expansion stand column is improved, the connection strength between the external connection plate and the expansion stand column is further effectively ensured, and the use stability of the vibration guide block is ensured; meanwhile, the compression spring can absorb part of the vibration acting force so as to further reduce the influence of the vibration acting force on the expansion upright column.

Preferably, the abutting plate and the external connecting plate are provided with a protection assembly together, and the protection assembly comprises a clamping cylinder, a preset rod and a limiting block; the preset rod is arranged on the side wall of the outer connecting plate facing the abutting plate, the clamping cylinder is arranged on the side wall of the abutting plate facing the outer connecting plate, and the limiting block is arranged in the inner cavity of the clamping cylinder; and one end of the preset rod, which is close to the outer connecting plate, is positioned in an inner cavity of the clamping cylinder.

By adopting the technical scheme, the preset rod is abutted into the inner cavity of the clamping cylinder to limit the deformation direction of the compression spring, so that the phenomena of excessive deformation and irreversible damage of the compression spring are reduced, and the service life of the compression spring is ensured; when the preset rod abuts against the limiting block, the compression spring is difficult to further compress and deform so as to protect the compression spring.

Preferably, the force unloading assembly comprises a base support sleeve, a positioning strip and a special-shaped strip; the positioning strip is arranged on the side wall of the supporting plate facing the vibration guide block, and the special-shaped strip is arranged on the side wall of the positioning strip facing the vibration guide block; the bottom support sleeve is arranged on the side wall of the vibration guide block facing the supporting plate, and the bottom support sleeve is arranged outside the special-shaped strip.

Through adopting above-mentioned technical scheme, the end shoring cover cup joints in the outside back of the dysmorphism strip of adaptation, when the dilatation stand along the length direction displacement of organism, leads the vibration block along with dilatation stand displacement in the lump, and the end shoring cover slides along the length direction of dysmorphism strip, and at this moment, the sliding resistance that the end shoring cover slided the in-process and produces can slow down partial vibration effort, and then has further ensured the stability in use of dilatation stand, has reduced the resonance phenomenon of dilatation stand and bistrique body.

Preferably, the bottom support sleeve and the vibration guide block are jointly provided with a connecting assembly, and the connecting assembly comprises a connecting screw rod and a clamping nut; the connecting screw rod is arranged on the side wall of the bottom support sleeve facing the vibration guide block, one end of the connecting screw rod, which is close to the vibration guide block, penetrates through the vibration guide block, and the clamping nut is in threaded fit with the outer edge of the connecting screw rod.

By adopting the technical scheme, after the connecting screw rod penetrates through the vibration guide block, the clamping nut is screwed tightly at the outer edge of the connecting screw rod, so that the bottom support sleeve and the vibration guide block are fixedly connected into a whole, the use stability of the bottom support sleeve is ensured, and the efficiency of the vibration guide block for conducting vibration acting force outwards is improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the lower bearing platform with the lower position ensures that the grinding head body can stably run at the middle position of the expansion upright post and the machine body, thereby ensuring the processing precision of the grinding head body to the workpiece; the vibration guide block improves the position stability and the use stability of the expansion upright column through self weight, and provides lateral support for the expansion upright column, so that the influence of vibration acting force on the expansion upright column is effectively reduced, the phenomenon that a grinding head body and the expansion upright column resonate and vibration lines are generated on a workpiece is reduced, and the machining precision of a grinding machine on the workpiece is effectively guaranteed and improved;

2. when the vibration guide block is displaced along with the expansion upright column, the bottom support sleeve is displaced along the length direction of the special-shaped strip, at the moment, the friction resistance generated in the displacement process of the bottom support sleeve effectively offsets partial vibration acting force, so that the conduction of the vibration acting force on the expansion upright column is further slowed down, the resonance phenomenon of the expansion upright column and the grinding head body is further reduced, and the processing precision of the grinding machine to a workpiece is ensured.

Drawings

Fig. 1 is a schematic structural diagram of a high-machining-precision column-moving type numerically controlled grinding machine according to an embodiment of the present application;

FIG. 2 is an exploded view of the connection of the grinding head body, the connecting plate and the expansion column;

FIG. 3 is an enlarged schematic view of portion A of FIG. 2;

FIG. 4 is an exploded view of the connection between the vibration guide block and the expansion pillar;

FIG. 5 is an exploded view of the positional relationship of the abutment plate, the bottom bracket sleeve and the vibration guide block;

FIG. 6 is a longitudinal sectional view of the shock absorber and the deformation chamber.

Description of reference numerals:

1. a body; 11. expanding the volume of the upright column; 111. a grinding head body; 112. a connecting plate; 12. a vibration guide block; 121. presetting a groove; 122. a reinforcing plate; 13. a cushioning member; 131. a deformation cavity; 14. a support plate; 2. a low bearing platform; 21. a work table; 3. a drive assembly; 31. a drive motor; 32. a guide screw rod; 33. a sliding sleeve; 34. a bearing seat; 4. an orientation assembly; 41. an orientation bar; 411. a hole of abdication; 42. butting sleeves; 43. a deviation prevention strip; 5. a fixing assembly; 51. an outer connecting plate; 52. an abutting piece; 521. a compression spring; 522. a butt joint plate; 53. fixing the bolt; 6. a guard assembly; 61. a clamping cylinder; 62. presetting a rod; 63. a limiting block; 7. a force-relieving assembly; 71. a bottom support sleeve; 72. a positioning bar; 73. special-shaped strips; 8. a connecting assembly; 81. connecting a screw rod; 82. and clamping and fixing the nut.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses portable numerically control grinder of stand of high machining precision. Referring to fig. 1, the column movable type numerically controlled grinder with high machining precision includes a machine body 1, an expansion column 11, a low bearing platform 2 and a workbench 21. The low platform 2 is welded on the outer side wall of the machine body 1, in this embodiment, the low platform 2 is perpendicular to the machine body 1, and the height dimension of the low platform 2 is smaller than the height dimension of the machine body 1. The workbench 21 is an electromagnetic chuck, and the workbench 21 is slidably arranged on the upper surface of the low bearing platform 2 through a slide rail driven by a motor. After an operator places a workpiece to be machined on the upper surface of the workbench 21, the workbench 21 drives the workpiece to move along the extension direction of the low bearing platform 2.

Referring to fig. 1 and 2, the expansion column 11 is slidably disposed on the upper surface of the machine body 1 through a slide rail driven by a motor, and the expansion column 11 slides toward the low bearing platform 2 to be close to the working platform 21. The outer side wall of the expansion upright post 11 is provided with a grinding head body 111, and a grinding wheel of the grinding head body 111 can rotate at a high speed to grind a workpiece. In this embodiment, the volume of the expansion column 11 is much larger than the volume of the grinding head body 111, so as to reduce the influence of the vibration acting force generated by the grinding head body 111 on the expansion column 11 and reduce the resonance between the grinding head body 111 and the expansion column 11. The side wall of the grinding head body 111 close to the capacity expansion upright post 11 is integrally formed with a connecting plate 112 along the longitudinal direction, the peripheral dimension of the connecting plate 112 is larger than that of the grinding head body 111, and the connecting plate 112 and the capacity expansion upright post 11 are provided with a driving assembly 3 together.

Referring to fig. 2, the driving assembly 3 includes a driving motor 31, a guide screw 32, a sliding sleeve 33 and a bearing seat 34, in this embodiment, the sliding sleeve 33 is a sleeve with a threaded groove on an inner side wall, and the sliding sleeve 33 is welded to a side wall of the connecting plate 112 facing the expansion column 11 in a longitudinal direction through a bracket. The sliding sleeve 33 is sleeved on the outer edge of the guide screw rod 32, and the guide screw rod 32 is in threaded fit with the sliding sleeve 33. The driving motor 31 is fixed on the sidewall of the expansion column 11 far away from the machine body 1 through a bolt, and the output end of the driving motor 31 faces the ground. The bearing seat 34 is fixed on the inner side wall of the expansion column 11 through bolts, and the bearing seat 34 is located at one end of the connecting plate 112 far away from the driving motor 31. One end of the guide screw 32 close to the driving motor 31 is fixed at one end of the output end of the driving motor 31 facing the machine body 1 through a flange, and the other end of the guide screw 32 is rotatably arranged in the inner cavity of the bearing seat 34.

Referring to fig. 2, when the motor 31 is driven to rotate forward and output, the guide screw 32 rotates clockwise, so that the sliding sleeve 33 drives the connecting plate 112 to displace toward the worktable 21 until the grinding head body 111 reaches a designated position for grinding a workpiece. At this time, the grinding head body 111 is located at the middle position of the expansion upright post 11 and the machine body 1 in the longitudinal direction, and the grinding head body 111 is in a relatively stable state relative to the expansion upright post 11 and the machine body 1, so that the stability of the grinding head body 111 during workpiece processing is effectively guaranteed, the phenomenon of resonance of the grinding head body 111 and the expansion upright post 11 is reduced, and the processing precision of the equipment on the workpiece is guaranteed.

Referring to fig. 2, when the table 21 is displaced in the extending direction of the lower stage 2, the grinding head bodies 111 can machine different positions in the length direction of the workpiece. When the machine body 1 controls the displacement of the longitudinal column and makes the longitudinal column close to or far from the worktable 21, the grinding head body 111 can process different positions of the workpiece in the width direction. When the driving motor 31 rotates reversely to output end, the guiding screw rod 32 rotates counterclockwise, the sliding sleeve 33 drives the connecting plate 112 and the grinding head body 111 to move away from the workbench 21 along longitudinal direction, so as to process the higher position of the workpiece until the grinding head body 111 moves to the upper side of the workpiece, and stop processing.

Referring to fig. 2 and 3, the connecting plate 112 and the expansion column 11 are provided with an orientation assembly 4, and the orientation assembly 4 comprises an orientation bar 41, a butt sleeve 42 and a deviation preventing bar 43. In this embodiment, the number of the orientation bars 41 may be two, the two sets of orientation bars 41 are respectively fixed to the outer side wall of the expansion pillar 11 by bolts, and the guide screw 32 is located between the two sets of orientation bars 41. The orientation bar 41 extends along the height direction of the expansion column 11, and the two sides of the orientation bar 41 in the width direction are respectively provided with a yielding hole 411, and the yielding hole 411 also extends along the height direction of the orientation bar 41.

Referring to fig. 2 and 3, the docking sleeve 42 is welded to the sidewall of the connecting plate 112 facing the expansion column 11 in the longitudinal direction, and the inner diameter of the inner cavity of the docking sleeve 42 is matched with the outer circumference of the orientation bar 41. In this embodiment, the outer circumference of the deviation-preventing strip 43 is matched with the inner diameter of the abdicating hole 411, there may be two deviation-preventing strips 43 in the inner cavity of each butting sleeve 42, and the two deviation-preventing strips 43 are welded to the inner cavity of the butting sleeve 42 oppositely. After the butt-joint sleeve 42 is sleeved outside the directional bar 41, the deviation-preventing bar 43 just abuts against the inner cavity of the yielding hole 411, so that the displacement stability of the connecting plate 112 relative to the expansion upright post 11 is improved, and the machining precision of the grinding head body 111 on a workpiece is guaranteed.

Referring to fig. 4, dilatation stand 11 width direction's both sides are provided with through fixed subassembly 5 respectively and lead the piece 12 that shakes, and in this embodiment, lead the piece 12 that shakes and be solid steel block, lead the piece 12 that shakes and improve dilatation stand 11's positional stability with the dead weight to through providing the stability in use of side direction support in order to ensure dilatation stand 11 to dilatation stand 11, and then effectively reduced the influence of vibration effort to dilatation stand 11. Meanwhile, the vibration guide block 12 can transmit the vibration acting force on the expansion upright post 11 outwards, so that the long-time stay of the vibration acting force on the expansion upright post 11 is reduced, and the expansion upright post 11 and the grinding head body 111 generate resonance.

Referring to fig. 4, a preset groove 121 is formed in a side wall of the vibration guide block 12 away from the expansion column 11, and a plurality of reinforcing plates 122 are welded in the preset groove 121 at intervals on the vibration guide block 12. The reinforcing plate 122 separates a plurality of groups of mutually independent cavity bodies from the inner cavity of the preset groove 121, so as to further reduce the conduction of the vibration acting force on the expansion upright post 11, and simultaneously, effectively ensure the overall strength of the vibration guide block 12 and the use stability of the vibration guide block 12 and the expansion upright post 11.

Referring to fig. 4 and 5, the fixing assembly 5 includes an external connection plate 51, a fastening member 52 and a fixing bolt 53, the external connection plate 51 is integrally formed on the side wall of the vibration guide block 12 facing the expansion column 11, and the side wall of the external connection plate 51 facing the expansion column 11 is coplanar with the side wall of the vibration guide block 12 facing the expansion column 11. The abutting member 52 includes an abutting plate 522 and a plurality of sets of compression springs 521, all the compression springs 521 are vertically welded to the side wall of the vibration guide block 12 facing the expansion column 11, and the abutting plate 522 is longitudinally welded to one end of all the compression springs 521 far away from the vibration guide block 12.

Referring to fig. 5 and 6, a shock absorbing member 13 is adhered to a side wall of the vibration guide block 12 facing the expansion column 11, and in this embodiment, the shock absorbing member 13 is a rubber pad which is flexible and easy to deform. A plurality of deformation cavities 131 are arranged in the shock absorber 13 at intervals, and each deformation cavity 131 extends along the thickness direction of the shock absorber 13.

Referring to fig. 4 and 5, when the abutting plate 522 abuts against the side wall facing each other of the expansion column 11, the side wall of the shock absorber 13 facing the expansion column 11 also abuts against the outer side wall of the expansion column 11, and the rod body of the fixing bolt 53 penetrates through the outer abutting plate 51 and the abutting plate 522 and is screwed in the preset thread groove on the outer side wall of the expansion column 11, so that the outer abutting plate 51 is fixedly connected with the expansion column 11, and the vibration guide block 12 is quickly fixed on the outer side wall of the expansion column 11. When the vibration force is transmitted to the expansion column 11, the compression spring 521 and the damper 13 can absorb part of the vibration force, thereby further reducing the transmission of the vibration force between the grinding head body 111 and the expansion column 11.

Referring to fig. 5, the abutting plate 522 and the external connecting plate 51 are provided with the protection assembly 6, and the protection assembly 6 includes a clamping cylinder 61, a preset rod 62 and a limiting block 63. The preset rods 62 are perpendicularly welded to the side wall of the external connection plate 51 facing the abutting plate 522, in this embodiment, the number of the preset rods 62 on each external connection plate 51 may be two, and all the adjacent compression springs 521 are located between the two groups of the preset rods 62. The clamping cylinder 61 is vertically welded on the side wall of the abutting plate 522 facing the outer connecting plate 51, the limiting block 63 is welded in the inner cavity of the clamping cylinder 61, and the limiting block 63 is located at one end of the clamping cylinder 61 close to the outer connecting plate 51. The outer diameter of the preset rod 62 is matched with the inner diameter of the clamping cylinder 61, and one end, close to the clamping cylinder 61, of the preset rod 62 is sleeved in the inner cavity of the clamping cylinder 61. When the one end that predetermines pole 62 is close to stopper 63 offsets with stopper 63, compression spring 521 is difficult to further compression deformation, and then has effectively reduced compression spring 521 excessive compression deformation, the phenomenon of irreversible deformation appears even, has ensured compression spring 521's life.

Referring to fig. 4 and 5, a support plate 14 is welded on the upper surface of the machine body 1 and below each vibration guide block 12, the support plate 14 is in clearance fit with the vibration guide block 12, and the support plate 14 and the vibration guide block 12 are provided with a force unloading assembly 7 together. The force unloading assembly 7 comprises a base support sleeve 71, a positioning strip 72 and a profile strip 73, wherein the positioning strip 72 is welded on the side wall of the support plate 14 facing the vibration guide block 12, and the profile strip 73 is integrally formed on the side wall of the positioning strip 72 facing the vibration guide block 12. In this embodiment, the longitudinal cross-section of the profile strip 73 is dovetail-shaped. The lock bar 72 extends in the longitudinal direction of the support plate 14, and the profile bar 73 extends in the longitudinal direction of the lock bar 72.

Referring to fig. 4, the bottom bracket 71 is fixed on the side wall of the vibration guide block 12 facing the profile bar 73 through the connection assembly 8, and the inner diameter of the inner cavity of the bottom bracket 71 is matched with the outer circumference of the profile bar 73, so that the bottom bracket 71 is sleeved outside the profile bar 73. Along with the machine body 1 controlling the expansion upright post 11 to approach or leave the workbench 21, the vibration guide block 12 is displaced along with the expansion upright post 11, and the bottom support sleeve 71 is displaced along the length direction of the special-shaped strip 73, so as to further improve the efficiency of the outward conduction of the vibration acting force at the vibration guide block 12 and reduce the resonance phenomenon between the grinding head body 111 and the expansion upright post 11.

Referring to fig. 4, the connection assembly 8 includes a connection screw 81 and a fastening nut 82, and the connection screw 81 is perpendicularly welded to a side wall of the base support sleeve 71 facing the vibration guide block 12. One end of the connecting screw rod 81 close to the vibration guide block 12 can penetrate through the bottom plate of the vibration guide block 12 and extend to the inner cavity of the preset groove 121, and the clamping and fixing nut 82 is screwed on the outer edge of the connecting screw rod 81 in a threaded manner, so that the connecting screw rod 81 is fixedly connected with the vibration guide block 12, the connecting strength of the bottom bracing sleeve 71 and the vibration guide block 12 is further ensured, and the stability of the bottom bracing sleeve 71 in sliding along the length direction of the special-shaped strip 73 is improved.

The implementation principle of the column movable type numerical control grinding machine with high machining precision in the embodiment of the application is as follows:

the motor 31 is driven to rotate the output end forward to rotate the guide screw 32 clockwise, so that the sliding sleeve 33 drives the connecting plate 112 and the grinding head body 111 to move downwards along the longitudinal direction. The lower bearing platform 2 is located at a lower position compared with the machine body 1, so that the grinding head body 111 can be conveniently and downwards settled to the lower position, namely, a workpiece is stably machined at the middle position of the expansion upright post 11 and the machine body 1, and the machining stability of the grinding head body 111 is improved. Meanwhile, the volume of the expansion column 11 is far larger than the volume of the grinding head body 111, so as to reduce the influence strength of the vibration acting force generated by the grinding head body 111 on the expansion column 11 and reduce the resonance phenomenon between the grinding head body 111 and the expansion column 11. The vibration guide block 12 improves the position stability of the expansion upright post 11 through the gravitational potential energy of the vibration guide block, provides stable lateral support for the expansion upright post 11, and further reduces the phenomenon that the expansion upright post 11 vibrates due to the influence of the operation of the grinding head body 111.

When the machine body 1 controls the longitudinal upright to move toward or away from the table 21, the grinding head body 111 performs machining at different positions in the width direction of the workpiece. At this time, the bottom support sleeve 71 displaces along the length direction of the special-shaped strip 73, so that the conduction of the vibration acting force on the expansion upright post 11 is further slowed down through the friction resistance generated in the sliding process, the phenomenon that the grinding head body 111 interacts with the upright post and generates resonance is reduced, the phenomenon that vibration lines occur when the grinding head body 111 is machined on a workpiece is further effectively reduced, and the machining precision of the workpiece by the grinding machine is guaranteed.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.