CN217344925U - Linear guide rail four-side composite grinding machine - Google Patents
Linear guide rail four-side composite grinding machine Download PDFInfo
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- CN217344925U CN217344925U CN202123177731.8U CN202123177731U CN217344925U CN 217344925 U CN217344925 U CN 217344925U CN 202123177731 U CN202123177731 U CN 202123177731U CN 217344925 U CN217344925 U CN 217344925U
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Abstract
The utility model relates to a grinding machine technical field discloses a linear guide four sides compound grinding machine, including the lathe bed, the top of lathe bed is equipped with the grinding machine workstation, the grinding machine workstation is through vice and the lathe bed lateral sliding connection of a plurality of guide rails, be equipped with horizontal setting and first base and the second base that is parallel to each other on the grinding machine workstation, the top surface of first base is higher than the top surface of second base, the top of lathe bed is equipped with crouching bistrique and two and founds the bistrique, longitudinal and vertical removal can be followed respectively to the bistrique of crouching, found the bistrique can be followed respectively vertical and vertical removal, the distance between the vertical center pin of founding the vertical center pin of bistrique and the vertical plane at the vertical center pin place of crouching the bistrique is the grinding distance, the grinding distance is 315mm ~ 500 mm. The utility model discloses walking precision when can improve the linear guide grinding.
Description
Technical Field
The utility model relates to a grinding machine technical field especially relates to a linear guide four sides compound grinding machine.
Background
Nowadays, with the popularization of mechanization, linear guide rails and various linear rails in various fields such as machine tool industry, mechanical industry, robots and the like are widely applied, and the cross sections of the guide rails and the rails are various and have severe processing requirements. The prior art is that a grinding wheel is trimmed into a required shape by a trimming wheel, then the grinding wheel is used for grinding the required shape on a workpiece, and if the ground finished product is a linear guide rail, the grinding wheel is called a linear guide rail grinding machine. The linear guide rail grinding machine is generally provided with a horizontal grinding head and two vertical grinding heads, wherein the horizontal grinding head grinds the top surface or the bottom surface of a linear guide rail, the two vertical grinding heads grind two sides of the linear guide rail respectively, the installation space problem is considered preferentially in the installation of the conventional linear guide rail grinding machine, the vertical grinding head and the horizontal grinding head are separated far to avoid the interference between the vertical grinding head and the horizontal grinding head, and the walking precision of the linear guide rail during grinding is influenced by the method.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a linear guide four sides compound grinding machine of walking precision when can improve the linear guide grinding.
In order to achieve the aim, the utility model provides a four-side compound grinding machine with a linear guide rail, which comprises a machine body, the length direction of the bed body is transverse, the width direction of the bed body is longitudinal, the height direction of the bed body is vertical, the top of the bed body is provided with a grinding machine workbench, the grinding machine workbench is transversely connected with the bed body in a sliding manner through a plurality of guide rail pairs, a first base and a second base which are transversely arranged and are parallel to each other are arranged on the grinding machine workbench, the top surface of the first base is higher than the top surface of the second base, a horizontal grinding head and two vertical grinding heads are arranged above the lathe bed, the horizontal grinding head can respectively move along the longitudinal direction and the vertical direction, the vertical grinding head can move longitudinally and vertically respectively, the distance between a vertical central shaft of the vertical grinding head and a longitudinal plane where a vertical central shaft of the horizontal grinding head is located is a grinding distance, and the grinding distance is 315-500 mm.
As the preferred scheme of the utility model, horizontal, vertical and vertical removal can be followed respectively to the bistrique of lying.
As the preferable proposal of the utility model, the utility model also comprises a first portal frame and a second portal frame which are respectively matched with the lathe bed, a horizontal grinding unit is arranged on one side of the first portal frame close to the second portal frame, the horizontal grinding unit comprises a first longitudinal sliding table longitudinally and slidably connected with the first portal frame, a first vertical sliding table vertically and slidably connected with the first longitudinal sliding table and a first transverse sliding table transversely and slidably connected with the first vertical sliding table, the horizontal grinding head is fixedly connected with the first transverse sliding table, one side of the second portal frame close to the first portal frame is provided with two vertical grinding units, the vertical grinding unit comprises a second longitudinal sliding table and a second vertical sliding table, the second longitudinal sliding table is connected with the second portal frame in a longitudinal sliding mode, the second vertical sliding table is connected with the second longitudinal sliding table in a vertical sliding mode, and the vertical grinding head is fixedly connected with the second vertical sliding table.
As the utility model discloses a preferred scheme, first portal frame with second portal frame fixed connection is the box structure.
As the preferred scheme of the utility model, first longmen with between the second longmen the width of lathe bed is greater than first longmen with outside the second longmen the width of lathe bed.
As the preferred scheme of the utility model, the grinding distance is greater than the radius of found bistrique with the radius of bistrique crouches.
As the utility model discloses an optimal scheme, still include respectively with lathe bed complex first portal frame and second portal frame, first portal frame is close to one side of second portal frame is equipped with crouches and grinds the unit, crouch grind the unit include with first portal frame longitudinal sliding connection's first vertical slip table and with first vertical slip table of first vertical slip table vertical sliding connection, crouch the bistrique with first vertical slip table fixed connection, the second portal frame is close to one side of first portal frame is equipped with two and founds the unit, found the unit include with second portal frame longitudinal sliding connection's second vertical slip table and with the vertical slip table of second vertical slip table vertical sliding connection, found the bistrique with second vertical slip table fixed connection.
As the utility model discloses a preferred scheme, first portal frame with second portal frame fixed connection is the box structure.
As the preferred scheme of the utility model, first longmen with between the second longmen the width of lathe bed is greater than first longmen with outside the second longmen the width of lathe bed.
And simultaneously, the utility model also provides a linear guide rail four sides compound grinding machine's continuous-flow type grinding method, including following step:
the method comprises the following steps: placing a workpiece on the first base or the second base, and grinding the top surface of the workpiece by the horizontal grinding head;
step two: inverting the workpiece with the ground top surface in the first step on the first base, and placing another workpiece on the second base; the time required for grinding the top surface or the bottom surface of the workpiece is t1, the time required for grinding the two sides of the workpiece is t2, wherein t2 is more than or equal to 2t 1;
step three: the horizontal grinding head grinds the bottom surface of the workpiece on the first base, and the two vertical grinding heads grind two sides of the workpiece on the first base respectively;
step four: after the bottom surface of the workpiece on the first base is ground, the horizontal grinding head moves to the position above the workpiece on the second base to grind the top surface of the workpiece on the second base, and the two vertical grinding heads continue to grind two sides of the workpiece on the first base;
step five: when the two sides of the workpiece on the first base are ground and the top surface of the workpiece on the second base is ground, the workpiece on the first base is dismounted, then the workpiece on the second base is inverted to the first base, and a new workpiece to be machined is placed on the second base;
step six: and repeating the third step to the fifth step to realize the flow grinding.
The embodiment of the utility model provides a linear guide four sides compound grinding machine compares with prior art, and its beneficial effect lies in: the walking precision of grinding machine workstation arbitrary grinding distance, the walking precision when being equal to (neglecting the small position change of bistrique itself) machined part grinding promptly, and because the grinding machine workstation moves through a plurality of guide rail pairs, consequently its walking precision is decided by the walking precision of guide rail pair, and when the stroke value of guide rail pair is big more, its walking precision is poor more (walking depth of parallelism is big more), consequently through reducing the grinding distance, the utility model discloses a grinding distance is 315mm ~ 500mm, can effectively improve the walking precision when machined part grinding, and the guide rail pair is according to error equipartition principle, and the walking depth of parallelism that the grinding machine workstation removed is about 1/3 of the walking depth of parallelism of single guide rail pair removal.
Drawings
FIG. 1 is a schematic diagram of a first embodiment of the present invention;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a top view of FIG. 1;
FIG. 4 is a block diagram of the horizontal grinding unit of FIG. 1;
FIG. 5 is a block diagram of the vertical mill unit of FIG. 1;
in the figure, 1, a lathe bed; 2. a grinder table; 21. a first base; 22. a second base; 3. A horizontal grinding head; 4. a vertical grinding head; 5. a first gantry; 51. a horizontal grinding unit; 511. a first longitudinal sliding table; 512. a first vertical sliding table; 513. a first transverse sliding table; 6. a second gantry; 61. A vertical mill unit; 611. a second longitudinal sliding table; 612. and the second vertical sliding table.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The utility model discloses in, transversely can regard as the X axle direction, vertically can regard as Y axle direction, vertically can regard as Z axle direction, and vertical plane then is the YZ plane.
As shown in fig. 1-5, the first embodiment of the present invention.
The utility model provides a compound grinding machine in linear guide rail four sides, includes lathe bed 1, and the length direction of lathe bed 1 is horizontal, and the width direction of lathe bed 1 is vertical, and the direction of height of lathe bed 1 is vertical, and the top of lathe bed 1 is equipped with grinding machine workstation 2, grinding machine workstation 2 through a plurality of guide rail pairs with lathe bed 1 lateral sliding connects, is equipped with horizontal setting and first base 21 and second base 22 that are parallel to each other on grinding machine workstation 2, and the top surface of first base 21 is higher than the top surface of second base 22, and the top of lathe bed 1 is equipped with horizontal bistrique 3 and two vertical bistriques 4, and horizontal bistrique 3 can be respectively along longitudinal and vertical removal, and vertical bistrique 4 can be respectively along longitudinal and vertical removal, and the distance between the vertical center pin of vertical bistrique 4 and the vertical plane that horizontal bistrique 3 belongs to is the grinding distance, and the grinding distance is 315mm ~ 500 mm.
The working principle of the embodiment is as follows: when the horizontal grinding head 3 and the vertical grinding head 4 grind the same workpiece (linear guide rail) at the same time, the horizontal positions of the horizontal grinding head 3 and the vertical grinding head 4 are kept unchanged, namely, the grinding distance L1 is kept unchanged, because the grinding machine workbench 2 drives the workpiece to move transversely, when the grinding machine workbench 2 moves the grinding distance L1, a certain point on the workpiece is driven to sequentially pass through a longitudinal plane where a vertical central shaft of the horizontal grinding head 3 is located and a longitudinal plane where a vertical central axis of the vertical grinding head 4 is located, at the moment, the section where the workpiece moves is ground, and if the traveling precision (traveling parallelism) of the section where the grinding machine workbench 2 moves is H1, the traveling precision of the section where the workpiece moves during grinding is H1, because any point on the workpiece needs to be driven by the grinding machine workbench 2 to move the grinding distance L1 to finish grinding, therefore, the grinding workbench 2 can freely grind the traveling precision of the distance L1, that is, the traveling accuracy of the workpiece during grinding is approximately equal to (neglecting the slight positional variation of the grinding head itself), but since the grinding machine table 2 moves through the plurality of guide rail pairs, the traveling accuracy is determined by the traveling accuracy of the guide rail pairs, and the traveling accuracy becomes worse (the traveling parallelism becomes larger) as the stroke value of the guide rail pairs becomes larger, the traveling accuracy during grinding of the workpiece can be effectively improved by reducing the grinding distance, and the traveling parallelism of the grinding machine table 2 moving by the guide rail pairs is about 1/3 of the traveling parallelism of the single guide rail pair moving according to the principle of uniform error distribution.
For example, the following steps are carried out: example 1: the grinding machine workbench 2 moves transversely through a plurality of densely-installed guide rail pairs with the grinding distance of 315mm, and according to table 1 (the mechanical industry standard of the people's republic of China), the walking parallelism of the guide rail pairs with the precision in the 315mm stroke is 3 μm, and under the principle of error homogenization, the walking parallelism of the grinding machine workbench 2 is about 1/3 of the walking parallelism of a single guide rail pair, namely the walking parallelism of the grinding machine workbench 2 is about 1 μm, so that the walking parallelism of a workpiece in grinding is 1 μm, and the use requirement of ultra-precision grade in the range below the 315mm stroke can be met later in use.
Example 2: the grinding machine workbench 2 moves transversely through a plurality of densely-installed guide rail pairs with the grinding distance of 500mm, the walking parallelism of the guide rail pairs with the precision in a stroke of 500mm is 4.5 mu m according to table 1, and under the principle of error equalization, the walking parallelism of the grinding machine workbench 2 is about 1/3 of the walking parallelism of a single guide rail pair, namely the walking parallelism of the grinding machine workbench 2 is about 1.5 mu m, so that the walking parallelism of a workpiece in grinding is 1.5 mu m, and the use requirement of ultra-precision grade in a range below 315mm stroke can be met later in use.
Example 3: the grinding machine table 2 moves laterally through a plurality of densely installed guide rail pairs with the precision level, the grinding distance is 800mm, the running parallelism of the guide rail pairs with the precision level in the 800mm stroke is 6 μm according to table 1, and under the principle of error equalization, the running parallelism of the grinding machine table 2 is about 1/3 of the running parallelism of a single guide rail pair, namely the running parallelism of the grinding machine table 2 is about 2 μm, so that the running parallelism of a workpiece in grinding is 2 μm, and the use requirement of the ultra-precision level in the range below 315mm stroke cannot be met later in use.
TABLE 1
Illustratively, the horizontal grinding heads 3 can move horizontally, longitudinally and vertically respectively, that is, the horizontal grinding heads 3 can move horizontally, so as to adjust the relative positions of the horizontal grinding heads 3 and the vertical grinding heads 4, on one hand, the grinding distance can be adjusted according to actual conditions, and on the other hand, when the horizontal grinding heads 3 need to move from the upper part of one base to the upper part of another base, the horizontal grinding heads 3 firstly move horizontally to be far away from the vertical grinding heads 4, so that interference collision between the horizontal grinding heads 3 and the vertical grinding heads 4 during longitudinal movement is avoided.
Illustratively, the present embodiment further includes a first portal frame 5 and a second portal frame 6 respectively matched with the bed 1, a horizontal grinding unit 51 is disposed on one side of the first portal frame 5 close to the second portal frame 6, the horizontal grinding unit 51 includes a first longitudinal sliding table 511 longitudinally slidably connected with the first portal frame 5, a first vertical sliding table 512 vertically slidably connected with the first longitudinal sliding table 511, and a first transverse sliding table 513 laterally slidably connected with the first vertical sliding table 512, the horizontal grinding head 3 is fixedly connected with the first transverse sliding table 513 to realize the lateral, longitudinal, and vertical movements of the horizontal grinding head 3, two vertical grinding units 61 are disposed on one side of the second portal frame 6 close to the first portal frame 5 to reduce the lateral distance between the vertical grinding head 4 and the vertical grinding head 4, and facilitate shortening the grinding distance, the vertical grinding unit 61 includes a second longitudinal sliding table 611 longitudinally slidably connected with the second portal frame 6, and a second vertical sliding table 612 vertically slidably connected with the second longitudinal sliding table 611, found bistrique 4 and the vertical slip table 612 fixed connection of second, realize founding the vertical and vertical movement of bistrique 4, first portal frame 5 and second portal frame 6 are the U type respectively, and the structure is firm, avoids crouching bistrique 3 and found bistrique 4 to take place the skew when fixed.
Exemplarily, the first portal frame 5 and the second portal frame 6 are fixedly connected to form a box-type structure, so that the stability of the relative position relation between the vertical grinding head 4 and the horizontal grinding head 3 is improved, the position deviation of the vertical grinding head 3 and the horizontal grinding head 3 on the same cross section of a workpiece is reduced, and the traveling precision of the workpiece during grinding is improved.
Illustratively, the width of the bed 1 between the first gantry and the second gantry is larger than the width of the bed 1 outside the first gantry and the second gantry. The local bending resistance of the grinding head is enhanced, and the horizontal stability of the area is strictly controlled, so that the radial displacement of any section of the ground workpiece when passing through the vertical grinding head 4 and the horizontal grinding head 3 is restrained, and the walking precision of the workpiece during grinding is improved.
The embodiment of the utility model provides a second.
In this embodiment, the grinding distance is greater than the radius of the vertical grinding head 4 and the radius of the horizontal grinding head 3, so as to effectively avoid interference collision between the horizontal grinding head 3 and the vertical grinding head 4 when the horizontal grinding head moves longitudinally, and the radius of the vertical grinding head 4 and the radius of the horizontal grinding head 3 are generally 300mm in consideration of the utilization wheel of the grinding wheel, so that the grinding distance of 315mm is greater than the radius of the vertical grinding head and the radius of the horizontal grinding head 3 respectively.
Illustratively, the present embodiment further includes a first portal frame 5 and a second portal frame 6 respectively matched with the bed 1, a horizontal grinding unit 51 is disposed on one side of the first portal frame 5 close to the second portal frame 6, the horizontal grinding unit 51 includes a first longitudinal sliding table 511 longitudinally slidably connected with the first portal frame 5 and a first vertical sliding table 512 vertically slidably connected with the first longitudinal sliding table 511, the horizontal grinding head 3 is fixedly connected with the first vertical sliding table 512 to realize vertical and longitudinal movement of the horizontal grinding head 3, two vertical grinding units 61 are disposed on one side of the second portal frame 6 close to the first portal frame 5, the vertical grinding units 61 include a second longitudinal sliding table 611 longitudinally slidably connected with the second portal frame 6 and a second vertical sliding table 612 vertically slidably connected with the second longitudinal sliding table 611, and the vertical grinding head 4 is fixedly connected with the second vertical sliding table 612 to realize longitudinal and vertical movement of the vertical grinding head 4.
Illustratively, the first portal frame 5 and the second portal frame 6 are fixedly connected to form a box-type structure. The stability of the relative position relation of the vertical grinding head 4 and the horizontal grinding head 3 is improved, the position deviation of the vertical grinding head 3 and the horizontal grinding head on the same section of a machined part is reduced, and the walking precision of the machined part during grinding is improved.
Illustratively, the width of the bed 1 between the first gantry and the second gantry is larger than the width of the bed 1 outside the first gantry and the second gantry. The local bending resistance of the grinding head is enhanced, and the horizontal stability of the area is strictly controlled, so that the radial displacement of any section of the ground workpiece when passing through the vertical grinding head 4 and the horizontal grinding head 3 is restrained, and the walking precision of the workpiece during grinding is improved.
And simultaneously, the utility model also provides a linear guide rail four sides compound grinding machine's continuous-flow type grinding method, including following step:
the method comprises the following steps: placing a workpiece on the first base 21 or the second base 22, and grinding the top surface of the workpiece by the horizontal grinding head 3;
step two: inverting the workpiece with the top surface ground in the first step on the first base 21, and placing another workpiece on the second base 22; the time required for grinding the top surface or the bottom surface of the workpiece is t1, the time required for grinding the two sides of the workpiece is t2, wherein t2 is more than or equal to 2t 1;
step three: the horizontal grinding head 3 grinds the bottom surface of the workpiece on the first base 21, and the two vertical grinding heads 4 grind two sides of the workpiece on the first base 21 respectively;
step four: after the bottom surface of the workpiece on the first base 21 is ground, the horizontal grinding head 3 moves to the position above the workpiece on the second base 22 to grind the top surface of the workpiece on the second base 22, and the two vertical grinding heads 4 continue to grind two sides of the workpiece on the first base 21;
step five: when the two sides of the workpiece on the first base 21 are ground and the top surface of the workpiece on the second base 22 is ground, the workpiece on the first base 21 is dismounted, then the workpiece on the second base 22 is turned upside down on the first base 21, and a new workpiece to be machined is placed on the second base 22;
step six: and repeating the third step to the fifth step to realize the flow grinding.
The principle of the water-flowing type grinding method is as follows: grinding the top surface of a workpiece, then placing the workpiece upside down on the first base 21, taking another workpiece to be arranged on the second base 22, and grinding the bottom surface and two side surfaces of the workpiece on the first base 21, wherein the grinding time of two sides of the workpiece is more than twice of the grinding time of the top surface or the bottom surface of the workpiece, so when the bottom surface of the workpiece on the first base 21 is ground, the side surface of the workpiece needs to be ground continuously, and by utilizing the time, the horizontal grinding head 3 moves to the position above the other workpiece to grind the top surface of the other workpiece, when the side surface of the workpiece on the first base 21 is ground, the top surface of the other workpiece is also ground, at the moment, the workpiece on the first base 21 is ground on four sides, and is unloaded, and then the workpiece on the second base 22 is placed upside down on the first base 21, meanwhile, a new workpiece is placed on the second base 22, the continuous-flow grinding is realized by repeated operation, by adopting the continuous-flow grinding method, a workpiece with four ground surfaces can be obtained when the machine is stopped and unloaded every time, and only one workpiece needs to be inverted when the machine is stopped and unloaded every time, so that the operation steps are reduced, and the production efficiency is improved.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (9)
1. The utility model provides a compound grinding machine in linear guide rail four sides which characterized in that: the grinding machine comprises a machine body, wherein the length direction of the machine body is horizontal, the width direction of the machine body is vertical, the height direction of the machine body is vertical, a grinding machine workbench is arranged at the top of the machine body and is in transverse sliding connection with the machine body through a plurality of guide rail pairs, a first base and a second base which are transversely arranged and are parallel to each other are arranged on the grinding machine workbench, the top surface of the first base is higher than the top surface of the second base, a horizontal grinding head and two vertical grinding heads are arranged above the machine body and can respectively move longitudinally and vertically, the vertical grinding heads can respectively move longitudinally and vertically, the distance between the vertical central shaft of the vertical grinding head and the vertical plane where the vertical central shaft of the horizontal grinding head is located is a grinding distance, and the grinding distance is 315-500 mm.
2. The four-side compound grinding machine of the linear guide rail according to claim 1, characterized in that: the horizontal grinding head can move along the transverse direction, the longitudinal direction and the vertical direction respectively.
3. The linear guide four-side compound grinding machine according to claim 2, characterized in that: still include respectively with first portal frame of lathe bed complex and second portal frame, first portal frame is close to one side of second portal frame is equipped with crouches and grinds the unit, crouch grind the unit include with first portal frame longitudinal sliding connection's first vertical slip table, with first vertical slip table of first vertical slip table vertical sliding connection and with first vertical slip table of first vertical slip table lateral sliding connection, crouch the bistrique with first horizontal slip table fixed connection, the second portal frame is close to one side of first portal frame is equipped with two and founds the unit, found the unit include with second portal frame longitudinal sliding connection's second vertical slip table and with the vertical slip table of the vertical sliding connection's of second vertical slip table, found the bistrique with the vertical slip table fixed connection of second.
4. The linear guide four-side compound grinding machine according to claim 3, characterized in that: the first portal frame and the second portal frame are fixedly connected to form a box-type structure.
5. The linear guide four-side compound grinding machine according to claim 3, characterized in that: the width of the bed body between the first gantry and the second gantry is larger than the width of the bed body outside the first gantry and the second gantry.
6. The linear guide four-side compound grinding machine according to claim 2, characterized in that: the grinding distance is larger than the radius of the vertical grinding head and the radius of the horizontal grinding head.
7. The linear guide four-side compound grinding machine according to claim 6, characterized in that: still include respectively with first portal frame of lathe bed complex and second portal frame, first portal frame is close to one side of second portal frame is equipped with crouches and grinds the unit, crouch grind the unit include with first portal frame longitudinal sliding connection's first vertical slip table and with first vertical slip table of first vertical slip table vertical sliding connection, crouch the bistrique with first vertical slip table fixed connection, the second portal frame is close to one side of first portal frame is equipped with two and immediately grinds the unit, immediately grind the unit include with second portal frame longitudinal sliding connection's second vertical slip table and with the vertical slip table of second vertical slip table vertical sliding connection's second, immediately the bistrique with the vertical slip table fixed connection of second.
8. The linear guide four-side compound grinding machine according to claim 7, characterized in that: the first portal frame and the second portal frame are fixedly connected to form a box-type structure.
9. The linear guide four-side compound grinding machine according to claim 7, characterized in that: the width of the bed body between the first gantry and the second gantry is larger than the width of the bed body outside the first gantry and the second gantry.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123177731.8U CN217344925U (en) | 2021-12-16 | 2021-12-16 | Linear guide rail four-side composite grinding machine |
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| CN202123177731.8U CN217344925U (en) | 2021-12-16 | 2021-12-16 | Linear guide rail four-side composite grinding machine |
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