Machine tool structure for cutting machine and three-shaft screw transmission numerical control cutting machine

Abstract

The utility model discloses a machine tool structure and three -axis screw rod transmission's numerical control cutting -to-size machine for cutting -to-size machine, including machine tool, movable gantry and machine head device, the machine tool includes the body and X axial drive mechanism, and the both ends of body are provided with first installation site and second installation site respectively, the both ends of body are provided with guide rail installation site respectively on the upper along, X axial drive mechanism includes X axial guide rail, first screw fixed base, second screw fixed base, X axle screw rod, X axle sliding plate module, screw rod nut, synchronous wheel and X axle drive arrangement, X axial guide rail installs and is positioned at the guide rail installation site, the both ends of screw rod are installed and positioned respectively on first installation site and second installation site through first screw fixed base and second screw fixed base respectively, in this way, utilize the cooperation of X axle screw rod and screw rod nut to replace gear rack, make the tooth gap in transmission process, avoid the precision deviation caused by the engagement uneven tightness.

Description

Technical Field

[0001] This utility model relates to the field of panel saws, and in particular to a machine tool structure for a panel saw and a CNC panel saw with a three-axis lead screw drive. Background Technology

[0002] A panel saw is a mechanical device used to cut and trim materials such as boards and profiles. It is widely used in furniture manufacturing, building materials processing, advertising production, packaging and printing, and many other industries. Through precise cutting control, it processes raw materials into the required parts according to preset dimensions and shapes, greatly improving the efficiency and accuracy of material processing.

[0003] In the transmission system of a CNC panel saw, high-precision and smooth motion in the X-axis direction is crucial to ensuring machining accuracy. Traditional panel saws generally use gear and rack transmission for the X-axis. While this method offers high transmission efficiency and suitability for high-speed motion, it has the following drawbacks:

[0004] For example, when the machining accuracy of gears and racks (such as tooth profile error and tooth pitch deviation) and the parallelism and meshing clearance during installation are not properly adjusted, it is easy to cause local meshing to be too tight or too loose. The overly tight area will increase the transmission resistance, leading to abnormal motor load and accelerated wear of components; the overly loose area will generate transmission clearance, causing motion loss or vibration, and ultimately causing machining accuracy deviation.

[0005] Therefore, it is necessary to research a new technical solution to address the above problems. Utility Model Content

[0006] In view of this, the present invention addresses the deficiencies of the existing technology, and its main purpose is to provide a machine tool structure for a cutting machine and a CNC cutting machine with three-axis lead screw transmission. Through the structural design of the X-axis drive mechanism, the X-axis lead screw and lead screw nut are used to replace the gear and rack. The lead screw nut is connected to the slide plate module, so that there is no backlash during the transmission process, avoiding the accuracy deviation caused by uneven meshing. Moreover, the uniform speed characteristic of the lead screw transmission makes the acceleration change of the slide plate module more stable during start-up, stopping and changing direction.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A machine tool structure for a cutting machine includes a bed and an X-axis drive mechanism disposed on the bed. The front and rear ends of the bed are respectively provided with a first mounting position and a second mounting position; the upper edges of the left and right ends of the bed are respectively provided with guide rail mounting positions.

[0009] The X-axis drive mechanism includes an X-axis guide rail, a first lead screw fixing seat, a second lead screw fixing seat, an X-axis lead screw, an X-axis slide block module, an X-axis lead screw nut, an X-axis synchronous pulley, and an X-axis drive device. The X-axis guide rail is installed and positioned at the guide rail mounting position.

[0010] The front and rear ends of the X-axis lead screw are respectively installed and positioned on the first mounting position and the second mounting position through the first lead screw fixing seat and the second lead screw fixing seat; the lead screw nut is sleeved on the X-axis lead screw; the X-axis synchronous pulley is connected to the output end of the X-axis drive device; the X-axis synchronous pulley is connected to the X-axis lead screw nut through the X-axis synchronous belt drive; and the X-axis slide plate module is slidably connected to the X-axis guide rail.

[0011] As a preferred embodiment, the X-axis slide block module includes a connecting plate and an X-axis slider. A left connecting plate and a right connecting plate are welded to the left and right ends of the connecting plate, respectively. The left and right connecting plates are slidably connected to the X-axis guide rail via the X-axis slider. The connecting plate adopts a structural design of sheet metal bending and welding to reduce the weight of the entire plate while ensuring rigidity and strength, so as to facilitate later installation and maintenance.

[0012] As a preferred embodiment, the left connecting plate and the right connecting plate are connected by a middle connecting part, the X-axis drive device is mounted and positioned on the lower end face of the connecting plate by an adapter frame, and the lead screw nut is fixed on the middle connecting part by a mounting bracket.

[0013] As a preferred embodiment, the bed includes a frame, a plurality of first vertical plates, and a plurality of second vertical plates. The frame includes a front frame, a rear frame, a left frame, and a right frame integrally welded together. The plurality of first vertical plates are respectively welded to the left frame and the right frame. The plurality of second vertical plates are integrally welded to the front frame and the rear frame, and the plurality of second vertical plates are located above the plurality of first vertical plates. A clearance space is formed between the plurality of second vertical plates and the plurality of first vertical plates. The X-axis guide rail is mounted and positioned on the plurality of first vertical plates. The left connecting plate and the right connecting plate are mounted on the X-axis guide rail through the clearance space. The frame, the plurality of first vertical plates, and the plurality of second vertical plates are integrally welded to form a rigid frame to ensure the overall strength of the bed.

[0014] A CNC cutting machine with three-axis lead screw drive includes a machine tool, a movable gantry frame, and a machine head device. The machine tool is the machine tool structure of any of the cutting machines described above. The movable gantry frame includes two support seats and a crossbeam between the two support seats. The two support seats are mounted and positioned on the left and right connecting plates of the X-axis slide plate module. A Y-axis transmission mechanism is provided on the crossbeam. The Y-axis transmission mechanism includes a Y-axis guide rail, a Y-axis lead screw, a Y-axis sliding plate, a driven synchronous pulley, and a Y-axis drive device. The Y-axis sliding plate is slidably connected to the Y-axis guide rail and the Y-axis lead screw. A driving synchronous pulley is mounted on the Y-axis drive device. The driving synchronous pulley is connected to the driven synchronous pulley via a synchronous belt. The driven synchronous pulley is connected to the Y-axis lead screw via a bearing. The Y-axis drive device drives the Y-axis lead screw to rotate. The machine head device is located on the Y-axis sliding plate and can move with the Y-axis sliding plate.

[0015] As a preferred embodiment, the head assembly includes at least a Z-axis drive device, a Z-axis lead screw, a Z-axis lead screw nut, a Z-axis sliding plate, and a main shaft, all mounted on a Y-axis sliding plate. The Z-axis lead screw nut is sleeved on the Z-axis lead screw, the Z-axis sliding plate is connected to the Z-axis lead screw nut, the main shaft is mounted on the Z-axis sliding plate, and the Z-axis drive device drives the Z-axis lead screw to rotate.

[0016] As a preferred embodiment, the head assembly further includes a coupling mounted on a Y-axis sliding plate; two Z-axis guide rails are provided on the front side of the Y-axis sliding plate; the output end of the Z-axis drive device is connected to the coupling; the coupling is connected to the Z-axis lead screw; and the Z-axis sliding plate is slidably connected to the Z-axis guide rails via a Z-axis sliding block.

[0017] Compared with the prior art, this utility model has significant advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it mainly relies on the structural design of the X-axis drive mechanism. The X-axis drive mechanism includes an X-axis guide rail, a first lead screw fixing seat, a second lead screw fixing seat, an X-axis lead screw, an X-axis slide block module, a lead screw nut, a synchronous pulley, and an X-axis drive device. The front and rear ends of the lead screw are respectively mounted and positioned on a first mounting position and a second mounting position through the first lead screw fixing seat and the second lead screw fixing seat, respectively. The lead screw nut is sleeved on the X-axis lead screw. The synchronous pulley is connected to the output end of the X-axis drive device. The synchronous pulley is connected to the lead screw nut through a synchronous belt drive. The X-axis slide block module is slidably connected to the X-axis guide rail. In this way, the cooperation between the X-axis lead screw and the lead screw nut replaces the gear and rack. The lead screw nut is connected to the slide block module, so that there is no tooth gap during the transmission process, avoiding the accuracy deviation caused by uneven meshing tightness. Moreover, the uniform speed characteristic of the lead screw drive makes the acceleration change of the slide block module more stable when starting, stopping, and changing direction.

[0018] Secondly, the X-axis drive unit drives the lead screw nut to move through the synchronous pulley and synchronous belt. The elastic deformation characteristics of the synchronous belt can absorb the impact load when the motor starts and stops, reducing the vibration of the transmission system.

[0019] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0020] Figure 1 This is a perspective view of the machine tool structure according to an embodiment of the present utility model;

[0021] Figure 2 This is a perspective view of the X-axis drive mechanism according to an embodiment of this utility model;

[0022] Figure 3 This is a structural diagram of the X-axis drive mechanism according to an embodiment of this utility model;

[0023] Figure 4 This is a perspective view of an embodiment of the present utility model;

[0024] Figure 5 This is a perspective view of a movable gantry frame according to an embodiment of this utility model;

[0025] Figure 6 This is a top view of the movable gantry frame according to an embodiment of this utility model;

[0026] Figure 7 This is a structural diagram of the head unit according to an embodiment of the present invention.

[0027] Explanation of reference numerals in the attached diagram:

[0028] 10. Machine tool structure 11. Bed

[0029] 12. X-axis drive mechanism

[0030] 111. First mounting position; 112. Second mounting position

[0031] 113. Guide rail mounting position; 114. Frame

[0032] 115. First vertical plate; 116. Second vertical plate

[0033] 117. Avoidance Position

[0034] 1141. Front frame 1142. Rear frame

[0035] 1143. Left frame; 1144. Right frame

[0036] 121. X-axis guide rail; 122. First lead screw fixing seat

[0037] 123. Second lead screw fixing seat; 124. X-axis lead screw

[0038] 125. X-axis slide block module; 126. X-axis lead screw nut

[0039] 127. X-axis synchronous pulley; 128. X-axis drive unit

[0040] 129. X-axis synchronous belt

[0041] 1251, Connecting plate; 1252, X-axis slider

[0042] 1253, Left connecting plate; 1254, Right connecting plate

[0043] 20. Movable gantry frame 21. Support base

[0044] 22. Crossbeam 23. Y-axis transmission mechanism

[0045] 231. Y-axis guide rail; 232. Y-axis lead screw

[0046] 233. Y-axis sliding plate; 234. Driven synchronous pulley

[0047] 235. Y-axis drive unit 236. Y-axis synchronous belt

[0048] 237. Active timing pulley; 238. Y-axis lead screw nut

[0049] 239. Y-axis sliding module

[0050] 24. Dust cover

[0051] 30. Head assembly; 31. Z-axis drive assembly

[0052] 32. Z-axis lead screw 33. Z-axis lead screw nut

[0053] 34. Z-axis sliding plate; 35. Spindle

[0054] 36. Coupling 37. Z-axis guide rail

[0055] 38. Z-axis sliding block. Detailed Implementation

[0056] Please refer to Figures 1 to 7 As shown, it illustrates the specific structure of an embodiment of the present invention.

[0057] In the description of this utility model, it should be noted that the directional terms such as "up", "down", "front", "back", "left", and "right" indicate the orientation and positional relationship based on the accompanying drawings or the orientation or positional relationship shown when wearing and using the device normally. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0058] A machine tool structure 10 for a cutting machine includes a bed 11 and an X-axis drive mechanism 12.

[0059] The X-axis drive mechanism 12 is mounted on the bed 11. The front and rear ends of the bed 11 are respectively provided with a first mounting position 111 and a second mounting position 112. The upper edges of the left and right ends of the bed 11 are respectively provided with guide rail mounting positions 113.

[0060] Preferably, the bed 11 includes a frame 114, a plurality of first vertical plates 115 and a plurality of second vertical plates 116, and the frame 114 includes a front frame 1141, a rear frame 1142, a left frame 1143 and a right frame 1144 integrally welded together.

[0061] The plurality of first vertical plates 115 are respectively welded to the left frame 1143 and the right frame 1144; the plurality of second vertical plates 116 are integrally welded to the front frame 1141 and the rear frame 1142, the plurality of second vertical plates 116 are located above the plurality of first vertical plates 115, wherein the plurality of second vertical plates 116 and the plurality of first vertical plates 115 form a clearance space 117, the X-axis guide rail 121 is installed and positioned on the plurality of first vertical plates 115, the left connecting plate 1253 and the right connecting plate 1254 are installed on the X-axis guide rail 121 through the clearance space 117, and the frame 114, the plurality of first vertical plates 115 and the plurality of second vertical plates 116 are integrally welded to form a rigid frame 114 to ensure the overall strength of the bed 11.

[0062] The X-axis drive mechanism 12 includes an X-axis guide rail 121, a first lead screw fixing seat 122, a second lead screw fixing seat 123, an X-axis lead screw 124, an X-axis slide block module 125, an X-axis lead screw nut 126, an X-axis synchronous pulley 127, and an X-axis drive device 128. The X-axis guide rail 121 is installed and positioned at the guide rail mounting position 113.

[0063] The front and rear ends of the X-axis lead screw 124 are respectively mounted and positioned on the first mounting position 111 and the second mounting position 112 via the first lead screw fixing seat 122 and the second lead screw fixing seat 123; the X-axis lead screw nut 126 is sleeved on the X-axis lead screw 124; the X-axis synchronous pulley 127 is connected to the output end of the X-axis drive device 128; the X-axis synchronous pulley 127 is connected to the X-axis lead screw nut 126 via the X-axis synchronous belt 129; and the X-axis slide plate module 125 is slidably connected to the X-axis guide rail 121.

[0064] Preferably, the X-axis sliding plate module 125 includes a connecting plate 1251 and an X-axis slider 1252. A left connecting plate 1253 and a right connecting plate 1254 are welded to the left and right ends of the connecting plate 1251, respectively. The left connecting plate 1253 and the right connecting plate 1254 are slidably connected to the X-axis guide rail 121 through the X-axis slider 1252. The connecting plate 1251 adopts a structural design of sheet metal bending and welding to reduce the weight of the entire plate while ensuring rigidity and strength, so as to facilitate later installation and maintenance.

[0065] Preferably, the left connecting plate 1253 and the right connecting plate 1254 are connected by an intermediate connecting part, the X-axis drive device 128 is mounted and positioned on the lower end face of the connecting plate 1251 by an adapter frame, and the X-axis lead screw nut 126 is fixed on the intermediate connecting part by a mounting frame.

[0066] A CNC panel saw with three-axis lead screw drive includes a machine tool, a movable gantry frame 20, and a head assembly 30. The machine tool is the machine tool structure 10 used in the aforementioned panel saw. The movable gantry frame 20 includes two support seats 21 and a crossbeam 22 between the two support seats 21. The two support seats 21 are mounted and positioned on the left connecting plate 1253 and the right connecting plate 1254 of the X-axis slide plate module 125. A Y-axis transmission mechanism 23 is provided on the crossbeam 22. The Y-axis transmission mechanism 23 includes a Y-axis guide rail 231, a Y-axis lead screw 232, a Y-axis sliding plate 233, a driven synchronous pulley 234, and a Y-axis drive device 235. The Y-axis sliding plate 233 is slidably connected to the Y-axis guide rail 231 and the Y-axis lead screw 232. A driving synchronous pulley 237 is mounted on the Y-axis drive device 235. The driving synchronous pulley 237 is connected to the driven synchronous pulley 234 via a synchronous belt. The driven synchronous pulley 234 is connected to the Y-axis lead screw via a bearing. The Y-axis drive device 235 drives the Y-axis lead screw 232 to rotate. The machine head device 30 is mounted on the Y-axis sliding plate 233 and can move with the Y-axis sliding plate 233. By setting the X-axis guide rail at the guide rail mounting position 113 (the upper end face of the first vertical plate 115), the traditional layout of the guide rail on the side of the machine table is changed, which optimizes the lateral space of the bed 11 and avoids the need to reserve operating space on both sides of the guide rail in the traditional structure. The lateral footprint of the equipment is reduced, and the utilization rate of the factory space is improved. Secondly, the X-axis, Y-axis and Z-axis transmission adopts a transmission structure combining lead screw and synchronous pulley: the Y-axis drive device drives the lead screw to rotate through the active synchronous pulley 237, the Y-axis synchronous belt 236 and the driven synchronous pulley 234. Compared with the traditional gear rack or linear motor transmission, the cost of the lead screw transmission components is reduced and the structure is simple. The Y-axis sliding plate 233 is slidably connected to the Y-axis guide rail 231 via the Y-axis sliding module 239. The Y-axis sliding plate 233 is drivenly connected to the Y-axis lead screw 232 via the Y-axis lead screw nut 238.

[0067] Preferably, the head assembly 30 includes at least a Z-axis drive device 31, a Z-axis lead screw 32, a Z-axis lead screw nut 33, a Z-axis sliding plate 34, and a main shaft 35 disposed on the Y-axis sliding plate 233. The Z-axis lead screw nut 33 is sleeved on the Z-axis lead screw 32, the Z-axis sliding plate 34 is connected to the Z-axis lead screw nut 33, the main shaft 35 is disposed on the Z-axis sliding plate 34, and the Z-axis drive device 31 drives the Z-axis lead screw 32 to rotate.

[0068] Preferably, the head assembly 3030 is further fitted with a dust cover 24. Preferably, the head assembly 30 also includes a coupling 36 disposed on the Y-axis sliding plate 233; two Z-axis guide rails 37 are disposed on the front side of the Y-axis sliding plate 233, the output end of the Z-axis drive device 31 is connected to the coupling 36, the coupling 36 is connected to the Z-axis lead screw 32, and the Z-axis sliding plate 34 is slidably connected to the Z-axis guide rails 37 through a Z-axis sliding block 38.

[0069] The key design feature of this utility model lies in its structural design of the X-axis drive mechanism. This mechanism includes an X-axis guide rail, a first lead screw fixing seat, a second lead screw fixing seat, an X-axis lead screw, an X-axis sliding plate module, a lead screw nut, a synchronous pulley, and an X-axis drive device. The front and rear ends of the lead screw are respectively mounted and positioned at a first mounting position and a second mounting position via the first and second lead screw fixing seats. The lead screw nut is sleeved on the X-axis lead screw. The synchronous pulley is connected to the output end of the X-axis drive device and is connected to the lead screw nut via a synchronous belt. The X-axis sliding plate module is slidably connected to the X-axis guide rail. Thus, the engagement of the X-axis lead screw and lead screw nut replaces the gear and rack mechanism. The connection between the lead screw nut and the sliding plate module eliminates backlash during transmission, avoiding accuracy deviations caused by uneven meshing. Furthermore, the uniform speed characteristic of the lead screw transmission makes the acceleration changes of the sliding plate module more stable during startup, stopping, and direction changes.

[0070] Secondly, the X-axis drive unit drives the lead screw nut to move through the synchronous pulley and synchronous belt. The elastic deformation characteristics of the synchronous belt can absorb the impact load when the motor starts and stops, reducing the vibration of the transmission system.

[0071] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A machine tool structure for a cutting machine, characterized in that: It includes a bed and an X-axis drive mechanism mounted on the bed. The front and rear ends of the bed are respectively provided with a first mounting position and a second mounting position. The upper edges of the left and right ends of the bed are respectively provided with guide rail mounting positions. The X-axis drive mechanism includes an X-axis guide rail, a first lead screw fixing seat, a second lead screw fixing seat, an X-axis lead screw, an X-axis slide block module, an X-axis lead screw nut, an X-axis synchronous pulley, and an X-axis drive device. The X-axis guide rail is installed and positioned at the guide rail mounting position. The front and rear ends of the X-axis lead screw are respectively installed and positioned on the first mounting position and the second mounting position through the first lead screw fixing seat and the second lead screw fixing seat; the lead screw nut is sleeved on the X-axis lead screw; the X-axis synchronous pulley is connected to the output end of the X-axis drive device; the X-axis synchronous pulley is connected to the X-axis lead screw nut through the X-axis synchronous belt drive; and the X-axis slide plate module is slidably connected to the X-axis guide rail.

2. The machine tool structure for the cutting machine according to claim 1, characterized in that: The X-axis slide block module includes a connecting plate and an X-axis slider. The left and right ends of the connecting plate are respectively welded with a left connecting plate and a right connecting plate. The left and right connecting plates are slidably connected to the X-axis guide rail through the X-axis slider.

3. The machine tool structure for the cutting machine according to claim 2, characterized in that: The left and right connecting plates are connected by a middle connecting part. The X-axis drive device is mounted and positioned on the lower end face of the connecting plate by an adapter frame. The lead screw nut is fixed on the middle connecting part by a mounting frame.

4. The machine tool structure for the cutting machine according to claim 3, characterized in that: The bed includes a frame, several first vertical plates, and several second vertical plates. The frame includes a front frame, a rear frame, a left frame, and a right frame that are integrally welded together. The several first vertical plates are respectively welded to the left frame and the right frame. The several second vertical plates are integrally welded to the front frame and the rear frame, and the several second vertical plates are located above the several first vertical plates. A clearance space is formed between the several second vertical plates and the several first vertical plates. The X-axis guide rail is installed and positioned on the several first vertical plates. The left connecting plate and the right connecting plate are installed on the X-axis guide rail through the clearance space.

5. A CNC cutting machine with three-axis lead screw drive, characterized in that: The device includes a machine tool, a movable gantry frame, and a head assembly. The machine tool is the machine tool structure for a cutting machine as described in any one of claims 1 to 4. The movable gantry frame includes two support seats and a crossbeam between the two support seats. The two support seats are mounted and positioned on the left and right connecting plates of the X-axis slide plate module. A Y-axis transmission mechanism is provided on the crossbeam. The Y-axis transmission mechanism includes a Y-axis guide rail, a Y-axis lead screw, a Y-axis sliding plate, a driven synchronous pulley, and a Y-axis drive device. The Y-axis sliding plate is slidably connected to the Y-axis guide rail and the Y-axis lead screw. An active synchronous pulley is mounted on the Y-axis drive device. The active synchronous pulley is connected to the driven synchronous pulley via a synchronous belt. The driven synchronous pulley is connected to the Y-axis lead screw via a bearing. The Y-axis drive device drives the Y-axis lead screw to rotate. The head assembly is located on the Y-axis sliding plate and can move with the Y-axis sliding plate.

6. The CNC cutting machine with three-axis lead screw drive according to claim 5, characterized in that: The machine head assembly includes at least a Z-axis drive device, a Z-axis lead screw, a Z-axis lead screw nut, a Z-axis sliding plate, and a main shaft, all mounted on a Y-axis sliding plate. The Z-axis lead screw nut is sleeved on the Z-axis lead screw, the Z-axis sliding plate is connected to the Z-axis lead screw nut, the main shaft is mounted on the Z-axis sliding plate, and the Z-axis drive device drives the Z-axis lead screw to rotate.

7. The CNC cutting machine with three-axis lead screw drive according to claim 6, characterized in that: The head assembly also includes a coupling mounted on a Y-axis sliding plate; two Z-axis guide rails are mounted on the front side of the Y-axis sliding plate; the output end of the Z-axis drive device is connected to the coupling; the coupling is connected to the Z-axis lead screw; and the Z-axis sliding plate is slidably connected to the Z-axis guide rails via a Z-axis sliding block.

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