Five-sided linear rail grinding machine

Abstract

This disclosure provides a five-sided linear guide grinding machine, including a bed, a gantry frame, a first grinding mechanism, a second grinding mechanism, a worktable, a permanent magnet chuck, a side positioning fixture, and a feed mechanism. The permanent magnet chuck is mounted on the worktable for fixing a double-layer stacked linear guide that extends longitudinally. A pair of first grinding mechanisms are mounted on the crossbeam of the gantry frame for grinding the side profile surfaces of the double-layer stacked linear guide, respectively. The second grinding mechanism is used to grind the top profile surface of the double-layer stacked linear guide. The permanent magnet chuck includes multiple magnetic table units, each magnetic table unit being provided with a magnetic table base and multiple permanent magnets. According to this invention, the grinding machine can simultaneously perform high-precision grinding of the side profile surfaces and top profile surfaces of a double-layer stacked linear guide.

Description

Technical Field

[0001] This disclosure relates to the field of grinding and forming machine tools in the intelligent manufacturing equipment industry, and in particular to a five-sided linear guide grinding machine tool. Background Technology

[0002] Linear guides are used in machine tools and other equipment to guide the linear movement of moving parts. These linearly moving parts typically wrap around three surfaces of the linear guide, thus requiring grinding of the top and side profile surfaces to achieve the required surface profile accuracy. Existing technology includes specialized linear guide grinding machines that hold a linear guide in place using a permanent magnet chuck, allowing the worktable to move the guide. Three grinding mechanisms simultaneously grind two side profile surfaces and one top profile surface. However, this grinding method can only grind one linear guide at a time, limiting grinding efficiency. Summary of the Invention

[0003] This disclosure provides a five-sided linear guide grinding machine.

[0004] Specifically, this disclosure is achieved through the following technical solution:

[0005] This disclosure provides a five-sided linear guide grinding machine for simultaneously grinding the side and top contour surfaces of a double-layer stacked linear guide. The five-sided linear guide grinding machine includes a bed, a gantry frame, a first grinding mechanism, a second grinding mechanism, a worktable, a permanent magnet chuck, a side positioning fixture, and a feed mechanism. The bed is a long, longitudinally extending strip. The worktable is mounted on the bed and can be driven by the feed mechanism to reciprocate longitudinally relative to the bed. The permanent magnet chuck is mounted on the worktable to fix the longitudinally extending double-layer stacked linear guide. A pair of first grinding mechanisms are mounted on the crossbeam of the gantry frame for grinding the side contour surfaces of the double-layer stacked linear guide, respectively. The second grinding mechanism grinds the top contour surface of the double-layer stacked linear guide. The permanent magnet chuck includes multiple magnetic platform units. Each magnetic platform unit is equipped with a magnetic platform base and multiple permanent magnets. A coil is wound around the bottom of each permanent magnet. When the magnetic platform bases of multiple magnetic platform units are connected end to end along the longitudinal direction, the multiple permanent magnets of each magnetic platform unit are arranged in a single row of magnetic poles that are repeatedly alternated along the longitudinal direction. The magnetic poles of the permanent magnets in the beginning and end areas of adjacent magnetic platform units are the same and are arranged at intervals. Multiple side positioning fixtures are arranged at intervals along the longitudinal direction. Each side positioning fixture includes a fixture frame, a connecting plate and a positioning plate. The fixture frame includes a pair of vertical plates and a top plate connected between the pair of vertical plates. The top plate spans across the double-layer stacked rails. The outer side of the pair of vertical plates is connected to the permanent magnet chuck through the connecting plate. The inner side of the pair of vertical plates is positioned on the side contour surface of the double-layer stacked rails through the positioning plate.

[0006] In some embodiments, the volume size of a permanent magnet corresponding to one magnetic pole is set to be larger than the volume size of a permanent magnet corresponding to the other magnetic pole.

[0007] In some embodiments, grooves are formed on both sides of the permanent magnet. A connecting block and a cushion block are arranged in the grooves, the cushion block is arranged at the bottom of the connecting block, and the connecting plate is fixedly connected to the connecting block by bolts.

[0008] In some embodiments, adjusting cushion plates are arranged between the connecting plate, the vertical plate and the positioning plate, and an adjusting cushion plate is also arranged between the bottom of the vertical plate and the top surface of the permanent magnet.

[0009] In some embodiments, the bed body includes multiple bed segments connected end to end longitudinally. Flexible structures are used to connect the mating surfaces between adjacent bed segments and between the columns of the gantry and the mating surface of the bed body. Among them, the flexible structure includes a pinhole connection structure with an adjustable longitudinal gap and a positioning structure composed of a transverse keyway structure and a vertical keyway structure.

[0010] In some embodiments, a pair of transverse keyway structures between the mating surfaces of adjacent bed segments are symmetrically arranged at the upper positions on both sides of the mating surface, a vertical keyway structure is arranged at the upper position near the center of the mating surface, and the vertical keyway structure is located above the transverse keyway structure; and / or, a pair of transverse keyway structures on the mating surface between the column of the gantry and the bed body are symmetrically arranged at the upper positions on both sides of the mating surface, a vertical keyway structure is arranged close to one of the transverse keyways, and the vertical keyway structure is at the same height as the transverse keyway structure.

[0011] In some embodiments, the crossbeam is provided with a front cover plate on the front side and a rear cover plate on the rear side. An internal space is formed between the front cover plate and the rear cover plate. The internal space is provided with "day" - shaped rib plate units at the transverse two ends and multiple "rice" - shaped rib plate units arranged transversely between the "day" - shaped rib plate units. The "day" - shaped rib plate units and the "rice" - shaped rib plate units continuously extend longitudinally between the front cover plate and the rear cover plate. The internal space is also provided with crossbeam vertical rib plates, which longitudinally divide the "day" - shaped rib plate units and the "rice" - shaped rib plate units into a front cavity and a rear cavity respectively located at the front side and the rear side of the internal space of the crossbeam. The cavity of the rear cavity gradually increases from top to bottom.

[0012] In some embodiments, a longitudinally extending cylinder is arranged at the center of the "rice" - shaped rib plate unit, and the rib plates of the "rice" - shaped rib plate unit are connected to the outer periphery of the cylinder; the small cavities of the crossbeam separated by the "day" - shaped rib plate units and the "rice" - shaped rib plate units are all interconnected through through - holes; through - holes are formed on the rear cover plate, so that the small cavities of the crossbeam in contact with the rear cover plate are all connected to the outside.

[0013] In some embodiments, a "cross-shaped rib unit" is formed inside the bed section when viewed longitudinally. The "cross-shaped rib unit" is longitudinally divided into multiple arrays. The small cavities of the bed body between the "cross-shaped rib units" are interconnected through through-holes, and through-holes are formed on the side plates of the bed body, so that the small cavities of the bed body in contact with the side plates are connected to the outside.

[0014] In some embodiments, the top of the column of the gantry is supported transversely in the area between adjacent "meter-shaped rib units" of the crossbeam. Each column includes an enclosing plate, multiple transverse ribs and multiple vertical ribs arranged inside the enclosing plate. Each transverse rib surrounds the inside of the enclosing plate, and the multiple transverse ribs are arranged at intervals in the vertical direction. One vertical rib is arranged on the enclosing plates at the front and back of the column respectively, and two vertical ribs are arranged on the enclosing plates on both sides of the column respectively. The column is formed into a narrow section at the upper part, a wide section at the lower part and a transition section located between the narrow section and the wide section. Among them, an inclined surface is formed at the rear side of the transition section, and the inclined surface is transitionally connected between the rear side surfaces of the wide section and the narrow section, and diagonal ribs are arranged inside the inclined surface.

[0015] According to the embodiments of the present disclosure, the grinding machine tool can achieve high-precision grinding of the side profile and top profile of the double-layer stacked linear guide at the same time. Specifically, by setting the permanent magnet chuck to be composed of multiple magnet chuck units spliced together, the arrangement direction accuracy of the permanent magnets of each magnet chuck unit is high, thereby improving the arrangement direction accuracy of the magnetic force lines of the entire permanent magnet chuck, and making the magnetic suction force intensity and direction of the permanent magnet chuck on the double-layer stacked linear guide consistent in the length direction, so as to avoid the displacement of the upper linear guide during the grinding process; by arranging multiple permanent magnets of each magnet chuck unit in a single row of magnetic poles alternately in the longitudinal direction, and a coil is wound around the bottom of each permanent magnet, each permanent magnet with alternately arranged magnetic poles is set as an active magnetic pole, which improves the controllability of the direction of the magnetic force lines, and makes the magnetic suction force intensity and direction of the permanent magnet chuck on the double-layer stacked linear guide consistent in the length direction; by setting the magnetic poles of the permanent magnets in the head and tail areas of adjacent magnet chuck units to be the same and arranged at intervals, the magnetic chuck seats in the head and tail areas of adjacent magnet chuck units are used as passive magnetic poles arranged between the same and spaced permanent magnet poles, ensuring the smooth transition of the magnetic force lines between adjacent magnet chuck units, and avoiding local magnetic suction force intensity gaps and magnetic suction force direction disorders; by setting multiple positioning tools, since the connecting plates of each positioning tool are directly fixedly connected to the permanent magnet chuck, the positioning between the double-layer stacked linear guide and the permanent magnet chuck is accurate, thereby further ensuring the consistency of the magnetic suction force intensity and direction of the permanent magnet chuck on the double-layer stacked linear guide in the length direction.

[0016] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. Description of the Drawings

[0017] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments in line with this application, and are used together with the specification to explain the principles of this application.

[0018] Figure 1 is a schematic diagram of a five-sided linear guide grinding machine in an embodiment of the present disclosure;

[0019] Figure 2 is a schematic diagram of the state where the linear guide is adsorbed and fixed in an embodiment of the present disclosure;

[0020] Figure 3 is a schematic diagram of a permanent magnet chuck in an embodiment of the present disclosure;

[0021] Figure 4 is a rear cross-sectional view of a crossbeam in an embodiment of the present disclosure;

[0022] Figure 5 is a longitudinal cross-sectional view of a machine bed in an embodiment of the present disclosure;

[0023] Figure 6 is a perspective view of a column in an embodiment of the present disclosure;

[0024] Figure 7 is a partial schematic diagram of the machine bed at the flexible structure in an embodiment of the present disclosure;

[0025] Figure 8 is a cross-sectional view of the machine bed at the flexible structure in an embodiment of the present disclosure;

[0026] Figure 9 is a partial schematic diagram of the flexible structure between the machine bed and the column in an embodiment of the present disclosure;

[0027] Figure 10 is a cross-sectional view of the flexible structure between the machine bed and the column in an embodiment of the present disclosure.

[0028] Reference numerals:

[0029] 01: First linear guide; 02: Second linear guide; 10: Machine bed; 11: Bed section; 12: Vertical keyway structure; 13: Horizontal keyway structure; 14: Pin hole connection structure; 15: "Cross" shaped rib unit; 20: Crossbeam; 21: "Sun" shaped rib unit; 22: "Rice" shaped rib unit; 23: Crossbeam vertical rib; 30: Column; 31: Enclosure; 32: Horizontal rib; 33: Vertical rib; 34: Oblique rib; 40: Workbench; 50: First grinding mechanism; 60: Second grinding mechanism; 70: Permanent magnet chuck; 71: Magnet chuck unit; 72: Magnet chuck seat; 73: First permanent magnet; 74: Second permanent magnet; 75: Magnetic isolation strip; 80: Side positioning tooling; 81: Vertical plate; 82: Horizontal plate; 83: Positioning plate; 84: Connecting plate. Detailed Implementation

[0030] This disclosure will now be discussed with reference to several embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement this disclosure, and are not intended to imply any limitation on the scope of this disclosure.

[0031] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to"; the terms "embodiment" and "one embodiment" are to be interpreted as "at least one embodiment"; the term "another embodiment" is to be interpreted as "at least one other embodiment"; the terms "first," "second," etc., may refer to different or the same objects; the term "setup" is not limited to direct or indirect connections, nor to specific connection methods. Other explicit and implicit definitions may also be included below.

[0032] Specific numerical values ​​or ranges may be referred to in the following description. It should be understood that these values ​​and ranges are merely exemplary and may be helpful in putting the ideas of this disclosure into practice. However, the description of these examples is not intended to limit the scope of this disclosure in any way. These values ​​or ranges may be set differently depending on the specific application scenario and requirements.

[0033] As mentioned above, existing linear guide grinding machines can only grind one linear guide at a time, resulting in low grinding efficiency. The five-sided linear guide grinding machine proposed in the embodiments of this disclosure at least partially solves the above-mentioned problems. Reference will be made below. Figures 1 to 10 This describes the structure and working principle of a five-sided linear guide grinding machine according to an exemplary embodiment of the present disclosure. For example... Figures 1-10 As shown, the five-sided linear guide grinding machine of this embodiment generally includes a bed 10, a gantry frame, a first grinding mechanism 50, a second grinding mechanism 60, a worktable 40, a permanent magnet chuck 70, a positioning fixture, and a feed mechanism. It may also include conventional functional components of a linear guide grinding machine such as a dressing mechanism, a cooling mechanism, an outer protective housing, and an electrical control system. The worktable 40 is movably connected to the bed 10, and the permanent magnet chuck 70 is fixedly connected to the worktable 40. The linear guide to be ground is attracted and fixed by the permanent magnet chuck 70. The feed mechanism drives the worktable 40 to move relative to the bed 10, thereby causing the permanent magnet chuck 70 and the linear guide to move as a whole. The contour surface of the moving linear guide is simultaneously ground by the first grinding mechanism 50 and the second grinding mechanism 60.

[0034] Compared to existing single-rail profile grinding machines, this invention requires two rails stacked vertically in a double-layer structure, with a shim between them to create a gap. The two stacked rails are then simultaneously attracted to the permanent magnet stage 70. Because of the height distance between the upper rail and the stage 70, the magnetic attraction of the stage 70 to the upper rail is weakened. Small errors in the magnetic field direction become large errors at the upper rail, resulting in uneven distribution of the magnetic attraction along the length of the upper rail. This makes the upper rail prone to deformation during grinding, directly affecting the grinding accuracy of the rail profile. Furthermore, accurate positioning of the relative positions of the upper and lower rails before attraction further complicates the positioning process.

[0035] On the other hand, two sets of first grinding mechanisms 50 are set on the crossbeam 20. The grinding wheels of the two sets of first grinding mechanisms 50 grind the two side contour surfaces of the double-layer stacked linear guides simultaneously. The contour of the grinding wheel is set to conform to the overall contour of the side contour surfaces of the two linear guides in the double-layer stacked state. Since the contact area between the grinding wheel and the side contour surface of the linear guide is doubled, it directly leads to a greater load force and vibration during the grinding process. Therefore, the structural strength of the bed 10, crossbeam 20 and column 30 in the prior art cannot meet the requirements.

[0036] To clearly describe the technical concept and working principle of the embodiments of the present invention, the following will be presented: Figure 1 The length direction of the bed 10 is defined as "longitudinal", the length direction of the crossbeam 20 is defined as "transverse", the length direction of the column 30 is defined as "vertical", and the side on the crossbeam 20 where the first grinding mechanism 50 is installed is defined as "front side" and the other side is defined as "rear side". Those skilled in the art will understand that the definition of direction can be changed, and as long as the substantive content of the technical solution is the same as that of the embodiment of the present invention, it is considered to fall within the protection scope of the present invention.

[0037] In this embodiment of the invention, the bed 10 is arranged in a long, longitudinally extending strip shape. A gantry frame spans both sides of the bed 10, and two columns 30 of the gantry frame are respectively connected to both sides of the bed 10, making the bed 10 and the gantry frame an integral structure. This improves the stability of the positional relationship between the first grinding mechanism 50 on the gantry frame and the linear guide rail on the bed 10. The crossbeam 20 of the gantry frame is supported between a pair of columns 30, and a transversely extending guide rail is provided on the crossbeam 20. The two first grinding mechanisms 50 can move laterally along the guide rail, and the grinding wheel of each first grinding mechanism 50 can also move longitudinally independently. The grinding wheel shaft of the first grinding mechanism 50 is set to extend longitudinally, and the grinding wheels of the two first grinding mechanisms 50 simultaneously grind the two side contour surfaces of the double-layer stacked linear guide rail.

[0038] The second grinding mechanism 60 is located on one side of the bed 10. The grinding wheel of the second grinding mechanism 60 can move in the transverse and longitudinal directions. The grinding wheel shaft of the second grinding mechanism 60 is set to extend laterally. The grinding wheel of the second grinding mechanism 60 is used to grind the top contour surface of the upper linear guide.

[0039] During the grinding process, the feed mechanism drives the worktable 40 to move longitudinally and reciprocally relative to the bed 10, ensuring that the grinding wheel can traverse the entire length of the linear guide along the longitudinal direction. The bed 10 is set in a long strip shape to meet the stroke range requirements of the reciprocating movement.

[0040] The permanent magnet chuck 70 of this embodiment of the invention is used to attract and fix the first linear guide 01 and the second linear guide 02. The first linear guide 01 is directly attracted to the surface of the permanent magnet chuck 70, and the second linear guide 02 is stacked on top of the first linear guide 01 and is also attracted by the permanent magnet chuck 70. To ensure sufficient magnetic attraction strength and stable magnetic attraction direction for the first linear guide 01 and the second linear guide 02, this embodiment of the invention sets the permanent magnet chuck 70 as a segmented structure composed of multiple magnetic platform units 71 connected end-to-end. This avoids the large processing precision problems that accumulate due to the excessive length of the integrally manufactured permanent magnet chuck 70, which could lead to inaccurate arrangement of the permanent magnets and affect the magnetic attraction effect. Specifically, as shown... Figure 3 As shown, each magnetic stage unit 71 has the same main structure, including a magnetic stage base 72, multiple permanent magnets, and multiple magnetic isolation strips 75. The magnetic stage base 72 serves as the base of the magnetic stage unit 71, forming multiple spaces for placing the permanent magnets and magnetic isolation strips. The multiple permanent magnets are arranged in a single-row, spaced array along the longitudinal direction, with magnetic isolation strips 75 placed between adjacent first permanent magnets 73 and second permanent magnets 74. For example, the permanent magnet material can be an AlNiCo permanent magnet alloy, an IronChromiumCo permanent magnet alloy, permanent magnet ferrite, rare earth permanent magnet material, or composite permanent magnet material. The magnetic isolation strips are made of resin material and filled between adjacent permanent magnets. For example, the first permanent magnet 73 is set as the N pole, the second permanent magnet 74 is set as the S pole, and the area between adjacent magnetic stage units 71 is set as a passive S pole by the magnetic stage base 72.

[0041] In this invention, a coil is wound around the bottom of each permanent magnet. By setting the winding direction of the coil, all permanent magnets in each magnetic platform unit 71 are arranged in a state of repeated alternation of magnetic poles along the longitudinal direction. Since each permanent magnet is set as an active magnetic pole, the magnetic lines of force drawn from one pole permanent magnet can be actively guided into the adjacent other pole permanent magnet, making the direction of the magnetic lines of force more controllable. This ensures that the magnetic attraction strength and direction of the permanent magnet stage 70 to the double-layer stacked linear rails are consistent in the length direction.

[0042] Between two interconnected magnetic frustum units 71, gaps in magnetic attraction strength and instability in the direction of magnetic field lines can easily occur. In this embodiment of the invention, the magnetic frustum base 72 of each magnetic frustum unit 71 does not have permanent magnets in its initial and final regions. This ensures that the last permanent magnet at the point where adjacent magnetic frustum units 71 meet has the same magnetic pole. The metal material of the magnetic frustum base 72 itself in the initial and final regions serves as a passive magnetic pole, allowing the magnetic field lines of the last permanent magnet to be introduced into the passive magnetic pole defined by the magnetic frustum base 72. This smooths the magnetic field lines at the point where the two magnetic frustum units 71 meet, avoiding local gaps in magnetic attraction strength and disorder in the direction of magnetic attraction. For example, as... Figure 3 As shown, the magnetic pole of the last permanent magnet at the beginning and end of each magnetic stage unit 71 is N, and the magnetic pole of the magnetic stage base 72 in the connecting area is S. A total of four magnetic stage units 71 are spliced ​​together to form a permanent magnet suction stage 70. Each magnetic stage unit 71 has a longitudinal length of 1125mm, and the total length of the permanent magnet suction stage 70 is 4500mm.

[0043] In one embodiment, the volume size of the permanent magnet corresponding to one magnetic pole is uniformly set to be larger than the volume size of the permanent magnet corresponding to the other magnetic pole. For example, such as... Figure 3 As shown, the volume size of the permanent magnet corresponding to the N pole is set to be larger to ensure that all magnetic lines of force are controlled to be drawn out from the N pole and introduced into the S pole, thereby ensuring that the magnetic lines of force of the entire permanent magnet stage 70 are in the same direction.

[0044] In this embodiment of the invention, multiple side positioning fixtures 80 are provided, which are arranged at intervals along the longitudinal direction to perform lateral positioning on the stacked first linear guide 01 and second linear guide 02 in the longitudinal direction, so as to ensure the accurate relative position of the side contour surfaces of the first linear guide 01 and the second linear guide 02. Thus, when the grinding wheel of the first grinding mechanism 50 is used to perform synchronous contour grinding on the side contour surfaces of the first linear guide 01 and the second linear guide 02, the grinding accuracy of the side contour surfaces of the first linear guide 01 and the second linear guide 02 can be guaranteed.

[0045] Specifically, such as Figure 2 As shown, each side positioning fixture 80 includes a fixture frame, a connecting plate 84, and a positioning plate 83. The fixture frame includes a pair of vertical plates 81 and a top plate connected between the pair of vertical plates 81. The top plate spans across the second linear guide 02. The pair of vertical plates 81 are respectively set on both sides of the linear guide. The positioning plate 83 on the inner side of the pair of vertical plates 81 abuts against the side contour surfaces of the first linear guide 01 and the second linear guide 02, thereby ensuring the accurate relative position of the side contour surfaces of the first linear guide 01 and the second linear guide 02 in the lateral direction. The positioning plate 83 is fixedly connected to the vertical plates 81 by bolts. A connecting plate 84 is provided on the outer side of each pair of vertical plates 81. The connecting plate 84 is fixedly connected to the permanent magnet chuck 70, so that the vertical plates 81 are indirectly fixed to the permanent magnet chuck 70 through the connecting plate 84, which can avoid the positioning inaccuracy problem caused by the overall manufacturing error of the vertical plates 81 and the horizontal plates 82.

[0046] In one embodiment, grooves are formed on both sides of the permanent magnet, and connecting blocks and pads are provided in the grooves. The pads are located at the bottom of the connecting blocks, and the connecting plate 84 is fixedly connected to the connecting blocks by bolts. Thus, the position of the positioning plate 83 in the vertical (height direction) can be flexibly adjusted by the size of the pads.

[0047] In one embodiment, an adjusting pad is provided between the connecting plate 84, the vertical arm, and the positioning plate 83, so as to flexibly adjust the lateral position of the positioning plate 83; an adjusting pad is also provided between the bottom of the vertical plate 81 and the top surface of the permanent magnet, so as to flexibly adjust the vertical position of the positioning plate 83.

[0048] Because the grinding wheel of the first grinding mechanism 50 is used to grind the side contour surfaces of the first linear guide 01 and the second linear guide 02 simultaneously, compared with the grinding of a single linear guide in the prior art, the increased grinding contact area requires the bed 10, the crossbeam 20 and the column 30 to be able to withstand more force and vibration, so as to ensure the grinding accuracy of the two linear guides.

[0049] The bed 10 has a relatively long longitudinal dimension, and integral casting cannot achieve the required precision. In this embodiment of the invention, the bed 10 is configured as multiple bed segments 11 connected end-to-end along the longitudinal direction, such as... Figure 7 As shown, the mating surfaces of adjacent bed sections 11 are connected by a flexible structure. This flexible structure reduces vibration transmission between interconnected structural components while maintaining their relative positions, thus improving overall seismic performance. Furthermore, as... Figure 9 As shown, the column 30 and the bed 10 are also connected by a flexible structure to prevent the vibration between the gantry frame and the bed 10 from being transmitted to each other.

[0050] Specifically, regarding the flexible structure between the mating surfaces of bed segment 11, such as... Figure 8 As shown, a total of two transverse keyway structures 13 and one vertical keyway structure 12 are provided. The key is located on one mating surface, and the slot is located on the other mating surface. The position and shape of the key and slot are matched, so that when adjacent bed sections 11 are connected, the mating key and slot allow the bed sections 11 to adjust their relative position longitudinally. The vertical keyway structure 12 provides a transverse limiting function. One vertical keyway structure 12 is located in the area above the centerline of the mating surface, providing transverse limiting at a distance from the guide rail on the mating surface. This allows the transverse limiting function of the vertical keyway structure 12 to achieve the maximum limiting transverse moment relative to the bottom support of the bed 10.

[0051] The transverse keyway structure 13 is used to provide vertical limiting function. When grinding the double-layer stacked linear guides, there will be a tendency for vertical high-frequency separation between the first linear guide 01 and the second linear guide 02, which makes the vertical vibration greater than the transverse vibration. Therefore, two transverse keyway structures 13 are set and symmetrically arranged on both sides of the mating surface to obtain a balanced maximum limiting vertical torque relative to the center line of the mating surface.

[0052] In one embodiment, the groove of the vertical keyway structure 12 has an adjustable space in the vertical direction that is greater than that of the key, and the groove of the horizontal keyway structure 13 has an adjustable space in the horizontal direction that is greater than that of the key, thereby absorbing the local micro-deformation of the mating surface and thus avoiding local fracture damage to the bed 10.

[0053] For the flexible structure between the mating surfaces of the bed 10 and the column 30, such as Figure 10 As shown, a total of two transverse keyway structures 13 and one vertical keyway structure 12 are provided. The vertical keyway structure 12 is located in the rear and upper region of the centerline of the mating surface. Its location in the upper region ensures that the transverse limiting effect achieves the maximum limiting transverse torque relative to the column 30 and the bottom support of the bed 10. After the double-layer stacked linear guide is adsorbed and fixed, it first moves longitudinally backward to complete the first grinding stroke. The first grinding stroke transmits the greatest longitudinal backward load force (maximum grinding wheel depth) to the beam 20 and column 30. By placing the vertical keyway structure 12 in the rear region of the mating surface, and with the vertical keyway structure 12 having the same height position as the two transverse keyway structures 13, it can provide the column 30 with the maximum bearing torque.

[0054] Two transverse keyway structures 13 are symmetrically arranged on the front and rear sides of the mating face. During the grinding process, since the first grinding mechanism 50 is located on the front side of the longitudinal direction of the crossbeam 20, the two transverse keyway structures 13 provide a limiting effect to prevent the crossbeam 20 and the column 30 from overturning to the greatest extent.

[0055] In one embodiment, the edge region of the mating surface of the flexible structure connection is further provided with a pin hole structure 14. The pin hole structure 14 is used to connect the bed section 11 longitudinally and the gap is adjustable, and to connect the column 30 and the bed 10 and the gap is adjustable, thereby improving the shock resistance and machining accuracy of the structural components.

[0056] Grinding the double-layer stacked linear guides requires the bed 10, crossbeam 20, column 30 and worktable 40 to withstand greater load forces. This invention improves the mechanical properties of these structural components so that the overall mechanical properties of the machine tool foundation composed of these structural components are optimal.

[0057] In one embodiment, the crossbeam 20 has an internal space defined by a vertically extending rear cover plate and an obliquely extending front cover plate, wherein the rear cover plate is located on the longitudinal rear side of the crossbeam 20, and the front cover plate is located on the longitudinal front side of the crossbeam 20. Figure 4 As shown, the internal space is provided with "day"-shaped rib plate units 21 at both transverse ends, and a plurality of "rice"-shaped rib plate units arranged transversely between the "day"-shaped rib plate units 21. The "day"-shaped rib plate units 21 and the "rice"-shaped rib plate units 22 both extend continuously longitudinally between the front cover plate and the rear cover plate. The internal space is also provided with vertical rib plates of the crossbeam 20, which divide the "day"-shaped rib plate units 21 and the "rice"-shaped rib plate units 22 longitudinally into a front cavity and a rear cavity located on the front side and the rear side of the internal space of the crossbeam 20 respectively, and the cavity of the rear cavity gradually increases from top to bottom. By arranging "day"-shaped rib plate units 21 at both ends of the crossbeam 20 and a plurality of "rice"-shaped rib plate units 22 in the middle of the crossbeam 20, the "rice"-shaped rib plate units 22 provide the main structural strength for the crossbeam 20, and the "day"-shaped rib plate units 21 provide the balanced load-bearing capacity relative to the support points of the columns 30 at both ends of the crossbeam 20, so that the crossbeam 20 generally meets the seismic resistance and load-bearing capacity.

[0058] In one embodiment, a longitudinally extending cylinder is provided at the center of the "rice"-shaped rib plate unit 22, and the rib plates of the "rice"-shaped rib plate unit 22 are connected to the outer periphery of the cylinder. During the hoisting process of the crossbeam 20, the suspension hook can extend into the cylinder.

[0059] In one embodiment, the small cavities of the crossbeam 20 separated by the "day"-shaped rib plate units 21 and the "rice"-shaped rib plate units 22 are all interconnected through through-holes, and through-holes are formed on the rear cover plate, so that the small cavities of the crossbeam 20 in contact with the rear cover plate are all connected to the outside, so that the rib plate structure of the crossbeam 20 with dense separation can be realized by casting, and the through-holes are convenient for casting sand cleaning.

[0060] In one embodiment, as Figure 5 shown, a "cross"-shaped rib plate unit 15 is formed inside the bed section 11 longitudinally. The "cross"-shaped rib plate unit 15 is longitudinally divided into multiple arrays. The small cavities of the bed body 10 of the "cross"-shaped rib plate unit 15 are all interconnected through through-holes, and through-holes are formed on the side plates of the bed body 10, so that the small cavities of the bed body 10 in contact with the side plates are connected to the outside. By arranging a plurality of "cross"-shaped rib plate units 15 arranged longitudinally in an array, the bed body 10 has sufficient seismic resistance and structural strength in the longitudinal, transverse and vertical directions. By arranging through-holes, the rib plate structure of the bed body 10 with dense separation can be realized by casting, and the through-holes are convenient for casting sand cleaning.

[0061] In one embodiment, the top of the column 30 of the gantry is supported transversely in the area between adjacent "rice"-shaped rib plate units 22 of the crossbeam 20. Since the area between adjacent "rice"-shaped rib plate units 22 has a denser rib plate structure, the crossbeam 20 has sufficient structural strength to bear the bearing capacity from the column 30.

[0062] In one embodiment, each column 30 includes a surrounding panel 31, a plurality of transverse stiffeners 32 and a plurality of vertical stiffeners 33 disposed inside the surrounding panel 31. Each transverse stiffener 32 surrounds the interior of the surrounding panel 31, and the plurality of transverse stiffeners 32 are arranged at vertical intervals. One vertical stiffener 33 is arranged in the surrounding panel 31 at the front and rear of the column 30, and two vertical stiffeners 33 are arranged in the surrounding panel 31 on both sides of the column 30.

[0063] In one embodiment, the column 30 is formed as an upper narrow section, a lower wide section, and a transition section between the narrow and wide sections, wherein a slope is formed on the rear side of the transition section, the slope is connected between the rear sides of the wide and narrow sections, and a diagonal rib 34 is provided inside the slope.

[0064] The descriptions of the embodiments herein, including any references to directions and orientations, are for ease of description only and should not be construed as limiting the scope of the invention. The description of preferred embodiments involves combinations of features, which may exist independently or in combination; the invention is not particularly limited to the preferred embodiments. The scope of the invention is defined by the claims.

[0065] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A five-sided linear guide grinding machine, used for simultaneously grinding the side and top contour surfaces of a double-layer stacked linear guide formed by placing two linear guides vertically, characterized in that, The five-sided linear guide grinding machine includes a bed, a gantry frame, a first grinding mechanism, a second grinding mechanism, a worktable, a permanent magnet chuck, a side positioning fixture, and a feed mechanism. The bed is a long strip extending longitudinally. The worktable is mounted on the bed and can be driven by the feed mechanism to reciprocate longitudinally relative to the bed. The permanent magnet chuck is mounted on the worktable to fix a double-layer stacked linear guide placed longitudinally. A shim is placed between the two linear guides to form a gap. A pair of first grinding mechanisms are mounted on the crossbeam of the gantry frame to grind the two side contour surfaces of the double-layer stacked linear guide respectively. The second grinding mechanism is used to grind the top contour surface of the double-layer stacked linear guide. The permanent magnet chuck includes multiple magnetic table units. Each magnetic table unit is provided with a magnetic table base and multiple permanent magnets. A coil is wound around the bottom of each permanent magnet. When the magnetic table bases of multiple magnetic table units are connected end to end longitudinally, the multiple permanent magnets of each magnetic table unit move longitudinally... The permanent magnets are arranged in a single row of alternating magnetic poles, and the magnetic poles of the permanent magnets in the first and last areas of adjacent magnetic platform units are the same and arranged at intervals. The volume size of the permanent magnet corresponding to one magnetic pole is set to be larger than that of the permanent magnet corresponding to another magnetic pole, so that the magnetic attraction strength and direction of the permanent magnet stage on the double-layer stacked linear rails in the length direction are consistent, and the displacement of the upper linear rails is avoided during the grinding process. Multiple side positioning fixtures are arranged at intervals along the longitudinal direction. Each side positioning fixture includes a fixture frame, a connecting plate and a positioning plate. The fixture frame includes a pair of vertical plates and a top plate connected between the pair of vertical plates. The top plate spans across the double-layer stacked linear rails. The outer side of the pair of vertical plates is connected to the permanent magnet stage through the connecting plate. The inner side of the pair of vertical plates is positioned on the side contour surface of the double-layer stacked linear rails through the positioning plate. Grooves are formed on both sides of the permanent magnets. Connecting blocks and pads are set in the grooves. The pads are set at the bottom of the connecting blocks. The connecting plates and connecting blocks are fixedly connected by bolts.

2. The five-sided linear guide grinding machine tool according to claim 1, characterized in that, Adjustment pads are provided between the connecting plate, the vertical plate, and the positioning plate, and an adjustment pad is also provided between the bottom of the vertical plate and the top surface of the permanent magnet.

3. The five-sided linear guide grinding machine tool according to claim 1, characterized in that, The bed consists of multiple longitudinal sections connected end to end. The mating surfaces of adjacent sections, as well as the mating surfaces of the gantry columns and the bed, are connected by a flexible structure. The flexible structure includes a pin hole connection structure with adjustable gap along the longitudinal direction, and a positioning structure composed of a transverse keyway structure and a vertical keyway structure.

4. The five-sided linear guide grinding machine tool according to claim 3, characterized in that, A pair of transverse keyways between the mating surfaces of adjacent bed sections are symmetrically arranged on both sides of the mating surface at the upper position, and a vertical keyway is arranged at the center of the mating surface at the upper position, with the vertical keyway being positioned higher than the transverse keyway; and / or, a pair of transverse keyways between the column of the gantry and the bed are symmetrically arranged on both sides of the mating surface at the upper position, and a vertical keyway is set as the transverse keyway closer to one side, with the vertical keyway being at the same height as the transverse keyway.

5. The five-sided linear guide grinding machine tool according to claim 1, characterized in that, in, The rear cover plate is located at the longitudinal rear side of the cross beam, and the front cover plate is located at the longitudinal front side of the cross beam. The internal space is provided with "day"-shaped rib plate units at both transverse ends and multiple "rice"-shaped rib plate units arranged transversely between the "day"-shaped rib plate units. Both the "day"-shaped rib plate units and the "rice"-shaped rib plate units continuously extend longitudinally between the front cover plate and the rear cover plate. The internal space is also provided with a cross beam vertical rib plate, which longitudinally divides the "day"-shaped rib plate units and the "rice"-shaped rib plate units into a front cavity and a rear cavity respectively located at the front side and the rear side of the internal space of the cross beam. The cavity of the rear cavity gradually increases from top to bottom.

6. The five-sided linear guide grinding machine tool according to claim 5, characterized in that, A longitudinally extending cylinder is provided at the center of the "rice"-shaped rib plate unit, and the rib plates of the "rice"-shaped rib plate unit are connected to the outer periphery of the cylinder; the small cavities of the cross beam separated by the "day"-shaped rib plate units and the "rice"-shaped rib plate units are all interconnected through through holes; through holes are formed on the rear cover plate, so that the small cavities of the cross beam in contact with the rear cover plate are all connected to the outside.

7. The five-sided linear guide grinding machine tool according to claim 1, characterized in that, When viewed longitudinally, a "cross"-shaped rib plate unit is formed inside the bed section. The "cross"-shaped rib plate unit is longitudinally divided into multiple arrays. The small cavities of the bed body of the "cross"-shaped rib plate unit are all interconnected through through holes. Through holes are formed on the side plates of the bed body, so that the small cavities of the bed body in contact with the side plates are connected to the outside.

8. The five-sided linear guide grinding machine tool according to claim 5, characterized in that, The top of the column of the gantry is transversely supported in the area between adjacent "rice"-shaped rib plate units of the cross beam. Each column includes a surrounding plate, multiple transverse rib strips and multiple vertical rib strips provided inside the surrounding plate. Each transverse rib strip surrounds the inside of the surrounding plate, and multiple transverse rib strips are arranged at intervals vertically. One vertical rib strip is arranged on the front and rear surrounding plates of the column respectively, and two vertical rib strips are arranged on the left and right surrounding plates of the column respectively. The column is formed into a narrow section at the upper part, a wide section at the lower part and a transition section located between the narrow section and the wide section. Among them, an inclined surface is formed at the rear side of the transition section, and the inclined surface is transitionally connected between the rear side surfaces of the wide section and the narrow section. Diagonal rib strips are provided inside the inclined surface.

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