TWI658894B - Door type working machine - Google Patents

Abstract

The present invention provides a portal-type working machine, and the object thereof is to reduce weight and improve processing accuracy. The portal-type work machine of the present invention includes: a first upright post (10) and a second upright post (20); a cross rail (32) supported by the first upright post (10) and the second upright post (20); and a spindle head (332) ), Which is supported by the cross rail (32), and the first post (10) and the second post (20) are respectively provided with the main shaft head (332) side opposite to the cross rail (32) as they are directed upward. Inclined inclined pillars (15, 25). By providing the inclined stays (15, 25), weight reduction can be achieved, and the inclination of the inclined stays (15, 25) corresponds to the arrangement of the spindle head (332) with respect to the cross rail (32). The rigidity of each column (10, 20) is increased to effectively withstand the increase in load on the spindle head (332) side. Therefore, it is possible to reduce weight and improve processing accuracy.

Description

Door type working machine

[0001] This application claims priority based on Japanese Patent Application No. 2017-062240 filed on March 28, 2017. The entire contents of this Japanese application are incorporated herein by reference. The present invention relates to a gate-type working machine having a column.

[0002] A portal-type work machine includes a cross rail supporting both ends by a pair of left and right uprights, and a spindle head supported by the cross rail. As for this type of portal-type working machine, the rigidity of the left and right columns needs to be increased to withstand the weight of the rail and the spindle head, and the spindle head will not affect the machining accuracy due to deflection. In the conventional door-type working machine, ribs of convex strips are provided along the oblique direction in the hollow interiors of the left and right columns to increase the rigidity thereof (for example, refer to Patent Document 1). [Prior Art Document] [Patent Document] [0003] Patent Document 1: Japanese Patent Application Laid-Open No. 10-286734

[Problems to be Solved by the Present Invention] [0004] In the conventional gate-type working machine described above, the ribs are formed by inclining in the longitudinal direction of the cross rail. Therefore, high rigidity can be obtained with respect to the load in the longitudinal direction of the cross rail. However, when the spindle head is supported by the cross rail, a load on the rail is likely to be generated in a direction toward the spindle head side, and the rigidity of the conventional gate-type work machine is insufficient for the load in the same direction. Therefore, there is a possibility that the left and right pillars are deflected toward the spindle head side with respect to the cross rail, and the machining accuracy may be reduced. [0005] An object of the present invention is to provide a gate-type work machine that suppresses deflection of a column and has high processing accuracy. [Means to Solve the Problem] [0006] The door-type working machine of the present invention is provided with: a first column and a second column; a cross rail supported by the first column and the second column; and a spindle head It is supported by the cross rail, and a structure is provided on the first pillar and the second pillar with inclined pillars that are inclined toward the main shaft head side of the cross rail as they go upward. [Effects of the Invention] [0007] According to the present invention, it is possible to provide a gate-type work machine that suppresses deflection of a column and has high processing accuracy.

[0009] [Outline of Door-type Work Machine] (1) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing a portal-type working machine 1 according to an embodiment of the present invention. In the figure, the X-axis direction and the Y-axis direction are both horizontal and orthogonal to each other, and the Z-axis direction is a vertical vertical direction orthogonal to the X-axis direction and the Y-axis direction. In the following description, one of the X-axis directions is set to the front, the other is set to the rear, the one in the Y-axis direction is set to the left, and the other is set to the right. [0010] The portal-type work machine 1 is a so-called grinding machine for grinding one surface of a workpiece, and includes: bases 31a, 31b; a first column 10; a second column 20; a rail 32; a saddle 331; a spindle head 332; processing The device 34 and a table 36 and a machine tool 35 on which a workpiece is arranged. [0011] [Machine Tool] The machine tool 35 includes a pair of linear guides (not shown) along the X-axis direction, and supports the table 36 so as to be movable in the X-axis direction. Further, a transport mechanism (not shown) that transports the table 36 in the X-axis direction is mounted on the machine tool 35. The conveyance mechanism uses a motor capable of arbitrarily controlling the amount of operation as a drive source, and can hold a workpiece (object to be processed) on the table 36 and convey it in the X-axis direction. [0012] A pair of base portions 31a and 31b are attached to both sides of the machine tool 35 in the Y-axis direction so as to extend. The first pillar 10 is mounted on the right base 31a, and the second pillar 20 is mounted on the left base 31b. The lower ends of the pillars 10, 20 are fixed to the base 31a by a known method such as bolts or welding. 31b. [0013] [rail] 横 The first column 10 and the second column 20 are arranged in the Y-axis direction via the machine tool 35 and are erected. A cross rail 32 is fixedly supported on the upper ends of the columns 10 and 20 so as to face the Y-axis direction via a bracket 32a (illustration of the bracket on the second column 20 side is omitted). The upper end portions of the columns 10 and 20 are fixed to the cross rail 32 by a known method such as bolts or welding. The cross rail 32 is elongated in the Y-axis direction, and supports the saddle 331 so as to be movable in the Y-axis direction through a linear guide (not shown) on its front side. In addition, a transport mechanism (not shown) that moves and positions the saddle 331 in the Y-axis direction is mounted on the rail 32. This conveying mechanism also uses a motor capable of arbitrarily controlling the amount of operation as a driving source, and can arbitrarily move and position the saddle 331 along the Y-axis direction. The saddle 331 supports the spindle head 332, and the spindle head 332 supports the processing device 34. On the other hand, the movement of the saddle 331 in the Y-axis direction is controlled by the cross rail 32 and the movement of the workpiece in the X-axis direction is controlled by the machine tool 35. Thereby, the processing device 34 can be moved and positioned relative to an arbitrary position in the X-Y plane with respect to the workpiece, and the grinding process can be performed on the entire surface of the workpiece or at any position. [0014] [Spindle Head and Saddle] The spindle head 332 is supported by the rail 32 through the saddle 331 so as to be movable in the Y-axis direction, and supported by the saddle 331 so as to be able to move up and down along the Z-axis direction. The spindle head 332 supports the processing device 34 at a lower end portion. [0015] The saddle 331 is used to raise and lower the spindle head 332 along the Z-axis direction. Therefore, the saddle 331 supports the spindle head 332 to be movable in the Z-axis direction by a linear guide (not shown). A transport mechanism (not shown) that moves and positions the spindle head 332 in the Z-axis direction is mounted on the saddle 331. This conveying mechanism also uses a motor capable of arbitrarily controlling the amount of operation as a driving source, and can arbitrarily move and position the spindle head 332 along the Z-axis direction. [0016] [Processing Device] The processing device 34 is held at the lower end portion of the spindle head 332.加工 The processing device 34 is a grinding device having a disc-shaped or cylindrical grinding wheel 34a that is rotationally driven around the Y axis as a tool. The grinding wheel 34a is arranged at the right end of the lower end portion of the spindle head 332. The grinding wheel 34a is polished by rotating the outer periphery of the grinding wheel 34a in contact with the workpiece. [0017] [First Column and Second Column] FIG. 2 (A) is a perspective view of the first column 10 or the second column 20, and FIG. 2 (B) is a cross-sectional view taken along the line W-W of FIG. 2 (A). In addition, the structures of the first pillar 10 and the second pillar 20 are the same except that the widths in the Y-axis direction are different. Therefore, the same structural portions will be described with reference to FIGS. 2 (A) and 2 (B). In addition, in FIGS. 2 (A) and 2 (B), in order to simplify the description, it is shown that the widths in the Y-axis direction of the first column 10 and the second column 20 are the same, but as described above, the second column 20 is actually The width in the Y-axis direction is wide. [0018] The first pillar 10 and the second pillar 20 are hollow pillars which are integrally cast from a metal such as steel, and have a substantially ladder shape when viewed from the Y-axis direction. (1) The first and second pillars 10 and 20 include a top plate portion 11 and 21, a bottom plate portion 12 and 22, first pillars 13, 23, second pillars 14, 24, and inclined pillars 15, 25. [0019] Both the top plate portions 11, 21 and the bottom plate portions 12, 22 are rectangular plate-shaped elongated in the X-axis direction, and the bottom plate portions 12, 22 are longer than the top plate portions 11, 21. For weight reduction, rectangular openings are formed in the top plate portions 11 and 21 and the bottom plate portions 12 and 22. [0020] The first pillars 13, 23 connect the front end portions of the top plate portions 11, 21 and the front end portions of the bottom plate portions 12, 22, and are inclined slightly rearward as they go upward. The structure of the first pillars 13 and 23 is similar to that of channel steel. That is, the first pillars 13 and 23 have flanges 131 and 231 provided on both ends in the Y-axis direction so as to be erected rearward over the entire length, and have a cross-section in the shape of a “ㄈ”. [0021] The second pillars 14, 24 are formed along the Z-axis direction by connecting the rear end portions of the top plate portions 11, 21 and the rear end portions of the bottom plate portions 12, 22. The structure of the second pillars 14 and 24 is similar to that of channel steel. That is, the flanges 141 and 241 which are erected toward the front over the entire length of the second pillars 14 and 24 are formed at both ends in the Y-axis direction, and the cross-sections thereof have a “ㄈ” shape. [0022] As described above, the saddle 331 and the spindle head 332 are provided on the front side with respect to the cross rail 32. Therefore, the support load of the cross rail 32 with respect to the 1st pillar 10 and the 2nd pillar 20 becomes large on the front side. Therefore, the first pillars 13 and 23 have a higher rigidity with respect to the compression load in the longitudinal direction than the second pillars 14 and 24. Specifically, the widths of the flanges 131 and 231 of the first pillars 13 and 23 (the widths in the direction orthogonal to the longitudinal direction of the pillars) are wider than the widths of the flanges 141 and 241 of the second pillars 14 and 24. In addition, the first pillars 13 and 23 have a structure that increases the rigidity with respect to the compressive load in the longitudinal direction compared to the second pillars 14 and 24. The structure is not limited to this, and other structures may be adopted. For example, the wall thickness of the first pillars 13 and 23 or the thickness of the flanges 131 and 231 may be thickened, and ribs may be provided on the first pillars 13 and 23 in the up-down direction, and the first pillars 13 and 23 may also be provided. Install reinforcement. [0023] The inclined pillars 15 and 25 are inclined forward as they go upward to connect the front end portions of the top plate portions 11 and 21 and the rear end portions of the bottom plate portions 12 and 22. The structure of the inclined pillars 15 and 25 is similar to that of H-shaped steel. That is, flanges 151 and 251 are formed on both ends of the diagonal pillars 15 and 25 in the Y-axis direction so as to stand upright in the front-rear direction. [0024] As described above, in the processing device 34, the grinding wheel 34a is disposed at the right end of the lower end portion of the spindle head 332. Therefore, during the polishing, the entire spindle head 332 is positioned to the left with respect to the grinding wheel 34a. Therefore, the load of the second column 20 located on the left side is often greater than the load of the first column 10. Therefore, the second column 20 has a structure that has higher rigidity in the compression direction than the first column 10. Specifically, the width in the Y-axis direction of the second pillar 20 is wider than the width of the first pillar 10. In addition, as for the second column 20, the structure that increases the rigidity in the vertical compression direction compared with the first column 10 is not limited to this, and other structures may be adopted. For example, compared with the first pillar 10, the wall thickness of the pillars 23, 24 or the inclined pillar 25 of the second pillar 20 or the thickness of the flanges 231, 241, 251 can be thickened. A rib is provided on the inclined pillar 25 in the up-down direction, and a reinforcing member may also be installed on each of the pillars 23 and 24 of the second pillar 20 or the inclined pillar 25 and the flanges 231, 241, and 251. [0025] [Relationship between the inclined pillars of the first and second pillars and the main shaft head] FIG. 3 shows the relationship between the inclined pillars 15 and 25 of the first and second pillars 10 and 20 and the shaft head 332 Right side view of the portal-type work machine 1. As described above, the inclined pillars 15 and 25 of the first pillar 10 and the second pillar 20 are inclined forward as they are directed upward. When the portal machine 1 is viewed from the longitudinal direction (Y-axis direction) of the rail 32, the spindle head 332 is arranged to intersect its extension line e along the longitudinal direction of the diagonal pillars 15, 25. The extension lines e of the inclined pillars 15 and 25 pass through the center positions in the width direction of the flanges 151 and 251. [0026] The spindle head 332 moves up and down relative to the saddle 331. In FIG. 3, the main axis head 332 of the solid line indicates the upper limit position of vertical movement, and the main axis head 332 of the two-dot chain line indicates the lower limit position of vertical movement. As shown in FIG. 3, even when the spindle head 332 moves up and down from the upper limit position to the lower limit position, the spindle head 332 is arranged to intersect the extension line e of the inclined pillars 15 and 25. [Technical Effects of Embodiments of Invention] In the gantry type working machine 1, the first column 10 and the second column 20 are provided with the spindle head 332 side opposite to the rail 32 as they go upward, respectively. (Front) Inclined inclined pillars 15, 25. When the main shaft head 332 is supported on the front side with respect to the cross rail 32, the support load for each column 10, 20 becomes larger on the front side, but for such a load, the inclined pillars 15 and 25 inclined in the above direction are shown High rigidity. Therefore, even when the material usage of each of the columns 10 and 20 is reduced and the device is lightened, high rigidity can be obtained, and deflection of the columns 10 and 20 can be suppressed. Furthermore, by this, it is possible to reduce the occurrence of inclination of the spindle head 332, and it is possible to bring the grinding wheel 34a of the processing device 34 into contact with the workpiece in an appropriate direction, so that the machining accuracy can be improved. [0028] In addition, the columns 10, 20 having the above-mentioned inclined pillars 15, 25 are, for example, hollow box-shaped in the interior, and compared with a general column in which ribs (reinforcing structures) are provided in the interior along the up-and-down direction, Even when the amount of material used is reduced to about half (approximately lightweight to half), the same degree of rigidity as that of ordinary columns can be obtained. [0029] In addition, the gate-type work machine 1 is formed such that the rigidity of the first pillars 13 and 23 on the front side of the first pillar 10 and the second pillar 20 is higher than that of the second pillars 14 and 24. With regard to the first column 10 and the second column 20, the rigidity with respect to the spindle head 332 side of the cross rail 32 can be increased, and the deflection of each column 10, 20 can be reduced to further improve the machining accuracy. [0030] In addition, since the inclined pillars 15 and 25 of the first and second pillars 10 and 20 are formed in an H-shaped cross section, the weight and rigidity of the inclined pillars 15 and 25 can be reduced, and the gate-type work machine 1 can be maintained. And reduce the weight of the entire device. [0031] In the portal-type work machine 1, the rigidity of the second column 20 arranged on the opposite side of the grinding wheel 34a is greater than the rigidity of the second column 20 corresponding to the arrangement of the grinding wheel 34a in the Y-axis direction of the spindle head 332. One pillar 10 is higher. When the grinding wheel 34a is disposed on one side (right side) in the Y-axis direction of the spindle head 332, almost the entire spindle head 332 is always disposed on the left side of the grinding wheel 34a. Therefore, during the machining operation, the second column on the left is disposed. The supporting load of 20 is often increased. Therefore, by making the rigidity of the second column 20 higher than that of the first column 10, it is possible to reduce the inclination during the machining operation and to further improve the machining accuracy of the device. In addition, even when the supporting load of the second column 20 becomes large, the durability can be improved by increasing the bearing capacity. [0032] In the portal-type working machine 1, when viewed from the Y-axis direction, the spindle head 332 is disposed to intersect the extension lines e of the inclined pillars 15 and 25 of the first and second pillars 10 and 20.该 In this configuration, the inclined pillars 15 and 25 of the first and second pillars 10 and 20 more effectively show high rigidity against the supporting load caused by the arrangement of the spindle head 332 with respect to the cross rail 32. Furthermore, even when the spindle head 332 is located at any position within the upper and lower movable ranges, a configuration is maintained in which the spindle head 332 intersects with the extension lines e of the inclined pillars 15 and 25. In this case, even when the processing device 34 is moved up and down during processing, it can always be supported with high rigidity. Therefore, it is possible to suppress the influence of the raising and lowering operation of the processing device 34 and perform the processing operation with high accuracy. [Others] 中 In the embodiment of the invention described above, the grinder having the processing device 34 having the grinding wheel 34a as the portal-type working machine 1 was exemplified. However, the portal type does not limit the type of processing of the processing device. For example, as shown in FIG. 4, the first column 10 and the second column may also be applied to a gate-type working machine 1A that supports a cutting disk of a processing device 34A including a tool 34Aa such as an end mill and a milling head by a spindle head 332. 20. Moreover, it is not limited to a grinder whose horizontal axis of rotation of the grinding wheel 34a is like the processing device 34 shown in FIG. The first column 10 and the second column 20 can also be applied. [0034] In addition, the left and right side surfaces of the first upright post 10 and the second upright post 20 are both open, but may be formed in a flat plate shape without openings. In addition, a plate for blocking the opening may be connected to the plate, or a cover may be provided.

[0035]

1.1A‧‧‧Door type working machine

10‧‧‧ the first column

20‧‧‧Second Post

11, 21‧‧‧ Roof plate department

12, 22‧‧‧ floor

13, 23‧‧‧ first pillar

14, 24 ‧ ‧ ‧ second pillar

15, 25‧‧‧ inclined pillar

32‧‧‧ horizontal rail

331‧‧‧ Saddle

332‧‧‧ Spindle head

34, 34A‧‧‧Processing equipment

34a, 34Aa ‧‧‧ Grinding wheel (tool)

131, 141, 151, 231, 241, 251‧‧‧ flange

e‧‧‧ extension cable

[0008] FIG. 1 is a perspective view showing a door-type working machine according to an embodiment of the present invention.图 [Fig. 2] Fig. 2 (A) is a perspective view of a first column or a second column, and Fig. 2 (B) is a sectional view taken along line W-W of Fig. 2 (A). [Fig. 3] is a side view of a gate-type working machine explaining the positional relationship between the direction of the inclined pillar of the first column or the second column and the spindle head.图 [Fig. 4] is a perspective view showing a different example of a processing device of a gate type working machine.

Claims (5)

A gate-type working machine comprising: a first column and a second column; a rail supported by the first column and the second column; and a spindle head supported by the rail, the first column and the second column The pillars each include a first pillar provided on the main spindle head side with respect to the rail, and a second pillar provided on a side opposite to the main spindle head side with respect to the rail, on the first Between the pillar and the second pillar, an inclined pillar that is inclined toward the main shaft head side with respect to the rail as the upward direction is provided. The gate type working machine according to item 1 of the scope of patent application, wherein the first pillar is formed to be more rigid than the second pillar. The gate-type working machine according to item 1 or 2 of the scope of patent application, wherein the cross-section of the inclined pillar is H-shaped. The gate type working machine according to item 1 or 2 of the scope of patent application, wherein the tool is disposed on one end side of one of the long sides of the rail of the spindle head and on the other side of the long side of the rail. The second upright on the end portion side is formed to be more rigid than the first upright. The gate type working machine according to item 1 or 2 of the scope of patent application, wherein when viewed from the longitudinal direction of the cross rail, the main spindle head is configured to extend with the inclined pillar of the first pillar and the second pillar. The lines cross.