A CNC equipment based on PLC control

Abstract

The present invention discloses a numerical control device based on PLC control, including a base, a bracket is provided on the base, a tool is provided on the bracket, a first guide groove is embedded in the processing groove, a mounting base plate is provided on the processing groove in a sliding matching connection, a first slider which is fixedly connected and slidably matched with the first guide groove is provided at the lower end of the mounting base plate, a rotating plate is rotatably connected on the mounting base plate, a clamp is installed on the rotating plate, a steering motor for driving the rotating plate to rotate relative to the mounting base plate is installed on the first slider, a limiting component for limiting the rotation of the rotating plate is provided on the side of the mounting base plate away from the first slider, and an adjustment button is elastically embedded on the mounting base plate. The present invention can ensure the stability of the rotation angle, and the stability of the rotating plate is also stronger during processing, and problems such as deflection will not occur, and the accuracy of the processed part is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of numerical control equipment, in particular to a numerical control equipment based on PLC control. Background Art

[0002] CNC machine tools have the advantages of strong adaptability, high processing accuracy, stable processing quality and high production efficiency. They comprehensively apply the technical achievements of electronic computers, automatic control, servo drive, precision measurement and new mechanical structures.

[0003] Chinese invention patent publication number: CN113210682A, discloses a CNC machine tool with multiple independent processing stations, including a bed, a crossbeam fixedly installed on the bed, at least two X-axis slides capable of sliding laterally relative to the crossbeam are arranged on the crossbeam, the X-axis slide is provided with a Z-axis slide capable of sliding vertically relative to the X-axis slide, a clamping seat is fixedly installed on the Z-axis slide, a spindle is fixedly installed on the clamping seat, a milling cutter is installed at the bottom end of the spindle, at least two table plates capable of sliding longitudinally relative to the bed are arranged on the bed, and a tool changing device for installing / disassembling the milling cutter for the spindle is fixedly installed on the table plate.

[0004] In this solution, multiple workstations are realized through multiple integrated tools. In specific processing, for different workpieces to be processed, as long as the models and sizes are different, it is generally the tools that need to be adjusted. If the fixture is rotatable, it will affect the stability during processing. Summary of the invention

[0005] The purpose of the present invention is to provide a numerical control device based on PLC control to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A numerical control device based on PLC control comprises a base, wherein a processing groove and a bracket opposite to the processing groove are provided on the base, a tool is slidably connected and provided on the bracket, a first guide groove is embedded in the processing groove, a mounting base plate is slidably connected and provided on the processing groove, a first slider slidably adapted to the first guide groove is fixedly connected and provided at the lower end of the mounting base plate, a rotating plate is rotatably connected and provided on the mounting base plate, a plurality of groups of clamps distributed in a ring array are installed on the rotating plate, a steering motor for driving the rotating plate to rotate relative to the mounting base plate is installed on the first slider, a limiting assembly for limiting the rotation of the rotating plate is provided on a side of the mounting base plate away from the first slider, an adjusting button is elastically embedded and provided on the mounting base plate, when the adjusting button moves downward, the adjusting button pulls the limiting assembly to release the rotation restriction on the rotating plate, the steering motor is started and drives the rotating plate to rotate, when the adjusting button moves upward, the steering motor stops rotating, the adjusting button releases the traction on the limiting assembly, and the limiting assembly restores the rotation restriction on the rotating plate.

[0008] As a further solution of the present invention: the rotating plate is a cylindrical structure, and the arc surface periphery of the rotating plate is provided with side teeth in a ring array, and the side teeth are movably embedded in the mounting base plate.

[0009] As a further solution of the present invention: the limit assembly includes two groups of limit plates rotatably arranged on one side of the rotating plate, the movable ends of the limit plates are relatively arranged, the limit plates are arc-shaped plates, and serrations are evenly arranged on the side of the limit plates facing the side teeth. The limit plates are internally rotatably connected to the mounting base plate, and a torsion spring is connected between the limit plates and the mounting base plate. The torsion spring acts to rotate the two groups of limit plates toward the side of the rotating plate, and the serrations on the limit plates and the side teeth form a snap-fit ​​fit.

[0010] As a further solution of the present invention: a third guide wheel is provided on the side of the two groups of limit plates away from the rotating plate, and the third guide wheel is fixedly installed in the mounting base plate. A traction rope is connected to the relatively close side of the two groups of limit plates, and the end of the traction rope away from the limit plate passes around the outer periphery of the corresponding third guide wheel and then merges to form a traction bundle, and the traction bundle is connected to the adjusting button.

[0011] As a further solution of the present invention: the adjusting button includes a pressing plate slidably embedded in the upper end of the mounting base plate, the lower end of the pressing plate is connected to the mounting base plate through a supporting spring, a sliding rod is fixedly connected to the center of the lower end of the pressing plate, the sliding rod is slidably adapted to the mounting base plate, and a conductive joint is fixedly connected to the lower end of the sliding rod.

[0012] As a further solution of the present invention: a second guide groove is embedded in the lower end of one side of the sliding rod, a first guide wheel is fixedly connected to the mounting base plate, the first guide wheel is slidably fitted in the second guide groove, and a connecting rope is connected to the lower end of the second guide groove.

[0013] As a further solution of the present invention: after the end of the connecting rope away from the second guide groove passes around the first guide wheel, it forms a right-angle bend and is then connected to a second slider, a plurality of through holes are provided on the second slider, the second slider is slidably connected to the mounting base plate in the horizontal direction, the end of the second slider away from the connecting rope is connected to the second guide wheel, and the end of the traction and combining device away from the rotating plate passes around the second guide wheel and is fixedly connected to the mounting base plate.

[0014] As a further solution of the present invention: an internal gear is embedded in the lower end of the rotating plate, the steering motor is installed and fixed on the side of the first slider facing the rotating plate through a mounting frame, the output end of the steering motor is transmission-connected to a driving wheel meshing with the internal gear, the rotating plate is hollow, and the lower end of the rotating plate is assembled with an inspection cover by threaded or screwed engagement.

[0015] As a further solution of the present invention: the clamp includes four groups of screw rods arranged in a cross-shaped array, and a clamping block is provided on the outer periphery of the screw rods through threaded matching connection. The opposite ends of the screw rods are both sleeved and fixed with transmission wheels, and the adjacent transmission wheels are meshed for transmission, and one of the screw rod ends is transmission-connected to a drive motor.

[0016] As a further solution of the present invention: the rotating plate is provided with a track groove opposite to the screw rod, the screw rod is rotatably connected in the track groove, the lower end of the clamping block is slidably adapted to the track groove, the opposite sides of multiple groups of the clamping blocks are arranged in an arc surface, and all have a serrated texture, and the thread rotation directions of adjacent screw rods are opposite.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: through the above-mentioned means, the workpiece can be clamped and limited by the clamp during use, and the rotation of the rotating plate relative to the mounting base plate can be adjusted by controlling the adjusting knob to align the workpiece clamped by the clamp with the tool, thereby aligning the center for convenient processing. In this way, multiple groups of clamps can be used to fix the workpieces to be processed with the same processing coefficient at the same time so as to perform the same processing procedure, and the adjusting knob can be used during processing to release the rotation restriction of the rotating plate by the limit assembly when controlling the steering motor to drive the rotating plate to rotate, and after the steering motor stops rotating, the traction of the limit assembly can be released so that the rotating plate is restricted from rotating, thereby ensuring the stability of the rotation angle, and the stability of the rotating plate is also stronger during processing, and problems such as deflection will not occur, and the accuracy of the workpiece is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the installation base plate and the rotating plate in the top view of the present invention.

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the installation base plate and the rotating plate in the upward direction of the present invention.

[0021] Figure 4 It is a schematic diagram of the matching structure of the rotating plate and the limiting assembly in the present invention.

[0022] Figure 5 It is a schematic diagram of the structure of the rotating plate in the present invention.

[0023] Figure 6 for Figure 4 Schematic diagram of the enlarged structure of area A in the middle.

[0024] Figure 7 It is a schematic diagram of the structure of the adjusting button in the present invention.

[0025] Figure 8 for Figure 7 Schematic diagram of the enlarged structure of area B in the middle.

[0026] Fig. 9 It is a schematic diagram of the connection structure of the connecting rope, the second sliding block and the second guide wheel in the present invention.

[0027] Fig.10 It is a schematic diagram of the structure of the clamp in the present invention.

[0028] In the figure: 1-base, 11-processing groove, 12-first guide groove, 13-bracket, 2-tool, 3-mounting base plate, 31-first slider, 32-mounting frame, 33-steering motor, 34-driving wheel, 4-rotating plate, 41-internal gear, 42-inspection cover, 43-side tooth, 5-clamp, 51-screw, 52-transmission wheel, 53-block, 6-adjusting button, 61-pressing plate, 62-support spring, 63-sliding rod, 64-conductive connector, 65-second guide groove, 66-first guide wheel, 67-connecting rope, 68-second slider, 69-second guide wheel, 7-limiting assembly, 71-limiting plate, 72-third guide wheel, 73-traction rope, 74-traction bundle. DETAILED DESCRIPTION

[0029] See also Figure 1-Figure 3In an embodiment of the present invention, a numerical control device based on PLC control includes a base 1, a processing groove 11 is embedded in the base 1, a bracket 13 opposite to the processing groove 11 is fixedly connected to the base 1, a tool 2 is slidably connected to the bracket 13, the output end of the tool 2 is opposite to the processing groove 11, a first guide groove 12 is embedded in the processing groove 11, a mounting base plate 3 is slidably connected to the processing groove 11, a first slider 31 slidably adapted to the first guide groove 12 is fixedly connected to the lower end of the mounting base plate 3, a rotating plate 4 is rotatably connected to the mounting base plate 3, and multiple mounting plates 4 are installed on the rotating plate 4. The clamps 5 are arranged in a circular array. The first slider 31 is provided with a steering motor 33 for driving the rotating plate 4 to rotate relative to the mounting base plate 3. A limit assembly 7 for limiting the rotation of the rotating plate 4 is provided on the side of the mounting base plate 3 away from the first slider 31. An adjusting button 6 is elastically embedded on the mounting base plate 3. When the adjusting button 6 moves downward, the adjusting button 6 pulls the limit assembly 7 to release the rotation restriction of the rotating plate 4, and the steering motor 33 is started and drives the rotating plate 4 to rotate. When the adjusting button 6 moves upward, the steering motor 33 stops rotating, the adjusting button 6 releases the traction of the limit assembly 7, and the limit assembly 7 restores the rotation restriction on the rotating plate 4.

[0030] By the above means, the workpiece can be clamped and limited by the clamp 5 during use, and the rotation of the rotating plate 4 relative to the mounting base plate 3 can be adjusted by controlling the adjusting button 6 to align the workpiece clamped by the clamp 5 with the tool 2, so as to facilitate processing after aligning the center. In this way, multiple groups of clamps 5 can be used to fix the workpieces to be processed with the same processing coefficient at the same time so as to perform the same processing procedure, and the adjusting button 6 can be used to control the steering motor 33 to drive the rotating plate 4 to rotate during processing. The rotation restriction of the rotating plate 4 by the limiting component 7 can be released, and after the steering motor 33 stops rotating, the traction of the limiting component 7 can be released so that the rotating plate 4 is restricted from rotating, thereby ensuring the stability of the rotation angle, and the stability of the rotating plate 4 is also stronger during processing, and problems such as deflection will not occur, and the accuracy of the workpiece is effectively improved.

[0031] Among them, the bracket 13 is provided with an X, Y, and Z three-way guide mechanism (all of which can be realized by a screw slider mechanism), which can control the tool 2 to move freely in a three-dimensional orientation, so that the processing position can be conveniently adjusted and aligned. The tool 2 is integrated with an infrared sensor to facilitate the positioning of the workpiece to be processed clamped on the fixture 5. Although the tool 2 still needs a three-way guide mechanism, the cooperation of the rotating plate 4 and the fixture 5 is not only for adjusting the direction, but also for facilitating the placement of multiple groups of workpieces to be processed. Therefore, the cooperation and rotation clamping of the rotating plate 4 and the fixture 5 is equivalent to coarse adjustment, while the three-way guide mechanism on the tool 2 is for fine adjustment and positioning, which improves the positioning efficiency. Moreover, the adjustment button 6 can be controlled to move downward and upward by an electrically controlled telescopic push rod. Of course, it can also be realized by any other controllable mechanism that can push the adjustment button 6 downward. All of the above can be automatically controlled by a PLC controller. This kind of functional control is a conventional PLC programming technology in the prior art, which will not be repeated here.

[0032] Furthermore, the extension direction of the first guide groove 12 is the same as the lateral movement direction of the tool 2 on the bracket 13. Assembly holes are symmetrically embedded on both sides of the first guide groove 12, and through holes corresponding to the assembly holes are provided on the mounting base plate 3, so that the mounting base plate 3 can be fixedly assembled on the processing groove 11 by bolts, etc. The position is adjustable, which is convenient for adjustment and matching according to the workpiece. At the same time, the setting of the first guide groove 12 can also facilitate the centralized processing of debris, etc. The bottom of the first guide groove 12 can be set to a slope, and the lower side of the slope passes through the side wall of the base 1, so as to facilitate the centralized collection of processing debris and make the processing environment easier to clean.

[0033] Further, such as Figure 4-Figure 6As shown, the rotating plate 4 is a cylindrical structure, and the arc surface periphery of the rotating plate 4 is provided with side teeth 43 in a ring array, and the side teeth 43 are movably embedded in the mounting base plate 3. The limiting assembly 7 includes two groups of limiting plates 71 rotatably arranged on one side of the rotating plate 4, and the movable ends of the limiting plates 71 are relatively arranged. The limiting plates 71 are arc-shaped plates, and the limiting plates 71 are evenly provided with saw teeth on the side facing the side teeth 43. The limiting plates 71 are rotatably connected to the inside of the mounting base plate 3, and the limiting plates 71 and the mounting base plate The two sets of limit plates 71 are connected between the two sets of limit plates 71, and the torsion spring acts to rotate the two sets of limit plates 71 toward the side of the rotating plate 4, and the serrations on the limit plates 71 and the side teeth 43 form a snap fit. The two sets of limit plates 71 are provided with a third guide wheel 72 on the side away from the rotating plate 4. The third guide wheel 72 is fixedly installed in the mounting base 3. The two sets of limit plates 71 are connected with a traction rope 73 on the side close to each other. The end of the traction rope 73 away from the limit plate 71 passes around the outer periphery of the corresponding third guide wheel 72 and then merges to form a traction bundle 74. The traction bundle 74 is fixedly connected to the adjusting button 6, so that when the adjusting button 6 moves, the traction rope 73 can be pulled by the traction bundle 74, so that the limit plate 71 can be driven by the traction of the traction rope 73 to rotate, thereby breaking away from the clamping limit of the opposite side teeth 43. At this time, the rotating plate 4 can rotate, and after the adjusting button 6 moves back, the limit plate 71 can be fitted with the stroke clamping limit of one side of the side teeth 43 under the action of the torsion spring, thereby limiting the rotation of the rotating plate 4. Two sets of limit plates 71 are provided, and the rotation directions of the two sets of limit plates 71 are opposite. On the contrary, the purpose is to avoid that when the rotating plate 4 drives the side teeth 43 to rotate, if there is only one set of limit plates 71, then under the action of thrust, because the saw teeth have an inclined surface, there is still a risk of pushing the limit plates 71 to rotate in a direction opposite to the rotating direction of the rotating plate 4. At this time, the fixing effect of the rotating plate 4 will become uncertain. The setting of two sets of limit plates 71 can overcome this problem. Regardless of the processing direction of the tool 2, the rotating plate 4 can maintain the static stability of the rotating plate 4 when subjected to force due to the cooperation of the two sets of limit plates 71.

[0034] Preferably, Figure 7-Figure 9As shown, the adjusting button 6 includes a pressing plate 61 slidably embedded in the upper end of the mounting base plate 3, and the lower end of the pressing plate 61 is connected to the mounting base plate 3 through a supporting spring 62. If the pressing plate 61 is driven by an electric telescopic push rod, the supporting spring 62 can cooperate with the pressing plate 61 to reset. If the pressing plate 61 is pushed by a cam mechanism, the supporting spring 62 can be used as a driving force to push the pressing plate 61 to reset. When necessary, the pressing plate 61 can also be pushed manually. A sliding rod 63 is fixedly connected to the center of the lower end of the pressing plate 61. The sliding rod 63 is slidably adapted to the mounting base plate 3. On this basis, a stepped blind hole needs to be provided at the upper end of the mounting base plate 3. The pressing plate 61 and the slide bar 63 can both form a sliding fit with the mounting base plate 3, and the support spring 62 can be connected to the outer periphery of the upper end of the blind hole portion with which the slide bar 63 slides, and the lower end of the slide bar 63 is fixedly connected with a conductive connector 64, and the conductive connector 64 is made of conductive copper, silver or other metal materials with good conductive properties. When the pressing plate 61 and the slide bar 63 push the conductive connector 64 to move downward, the conductive connector 64 is connected to the two ends of the control circuit of the steering motor 33, thereby forming a passage, so that the rotating plate 4 can be controlled to rotate. This part of the circuit is a prior art and will not be repeated here, and the conductive connector 64 can be used as a switch. The second guide groove 65 is embedded in the lower end of one side of the slide bar 63, and the second guide groove 65 extends upward along the axial direction of the slide bar 63. A first guide wheel 66 is fixedly connected to the mounting base 3, and the first guide wheel 66 is slidably matched in the second guide groove 65. When the pressing plate 61 is not pushed downward, the first guide wheel 66 is located at the lower end of the second guide groove 65, and a connecting rope 67 is connected to the lower end of the second guide groove 65. The end of the connecting rope 67 away from the second guide groove 65 bypasses the first guide wheel 66, forms a right-angle bend, and is then connected to a second slider 68. A through hole is set on the second slider 68. There are multiple through holes, and the second slider 68 is slidably connected in the mounting base plate 3 in the horizontal direction. The end of the second slider 68 away from the connecting rope 67 is connected to a second guide wheel 69, and the end of the traction beam 74 away from the rotating plate 4 passes around the second guide wheel 69 and is fixedly connected to the mounting base plate 3. A movable pulley is actually formed at the second slider 68. In this way, when the traction beam 74 resumes movement, only the restoring force of the torsion spring at the limit plate 71 acts. Therefore, this design is more labor-saving and has a faster response speed. The limit plate 71 recovers faster, so that the rotating plate 4 can be restricted and fixed in a shorter time after stopping rotation, thereby improving the stability effect.The pressing plate 61 and the slide bar 63 move downward, the support spring 62 is compressed, the end of the connecting rope 67 is driven and pulled, and the second slider 68 moves toward the side of the slide bar 63, and the first guide wheel 66 can slide relatively in the second guide groove 65, and the connecting rope 67 can be hidden in the second guide groove 65, which will not affect the sliding of the pressing plate 61 and the slide bar 63. Moreover, when the second slider 68 moves, it can also drive the traction combination 74 through the second guide wheel 69 to drive the limit plate 71 to release the limit of the side teeth 43. After the conductive joint 64 moves downward, the steering motor 33 can be turned on. The circuit drives the rotating plate 4 to rotate, and after the rotation angle adjustment is completed, the pressing plate 61 is driven to move upward or the pressing of the pressing plate 61 downward is released, and after the control circuit of the steering motor 33 removes the conductive connector 64, the rotating plate 4 stops rotating, the pressing plate 61 drives the slide bar 63 to slide upward, and the limit plate 71 that has lost the traction force resumes the limit of the side teeth 43, and drives the second guide wheel 69 and the second slider 68 away from the slide bar 63 through the traction beam 74, the slide bar 63 and the pressing plate 61 move upward, and the connecting rope 67 is gradually pulled out of the second guide groove 65 and restored to the original state. In this way, there is no influence between the limit plate 71 on the limit of the side teeth 43 and the steering motor 33 on the rotation drive of the rotating plate 4, the driving is flexible and convenient, easy to control, and can be controlled automatically or manually, the limit is stable, and the operation is convenient and flexible.

[0035] Above, such as Figure 3-Figure 5 As shown, an internal gear 41 is embedded in the lower end of the rotating plate 4, the first slider 31 is mounted and fixed to the side of the rotating plate 4 through a mounting frame 32, and the output end of the steering motor 33 is connected to a driving wheel 34 meshing with the internal gear 41, the rotating plate 4 is hollow, and an inspection cover 42 is assembled at the lower end of the rotating plate 4 through threaded or screwed engagement. The steering motor 33 can drive the internal gear 41 and the rotating plate 4 to rotate synchronously through the driving wheel 34, thereby forming a controlled rotation of the rotating plate 4.

[0036] Further, such as Figure 1-Figure 2 and Fig.10As shown, the clamp 5 includes four groups of screw rods 51 arranged in a cross-shaped array, the rotating plate 4 is provided with a track groove opposite to the screw rods 51, the screw rods 51 are rotatably connected in the track groove, and a block 53 is arranged on the outer periphery of the screw rods 51 through threaded matching connection, the lower end of the block 53 is slidably adapted to the track groove, and the opposite side of the multiple groups of the block 53 is arranged in an arc surface, and all have a sawtooth pattern, and the opposite ends of the screw rods 51 are sleeved and fixedly provided with a transmission wheel 52, and the adjacent transmission wheels 52 are meshed and driven, and the thread rotation directions of the adjacent screw rods 51 are opposite, and the end of one of the screw rods 51 is connected to a driving motor for transmission, and the driving motor can control the synchronous rotation of multiple groups of screw rods 51, and control the synchronous approach or distance of the block 53, so that it is convenient to fix and clamp the workpiece to be processed, and the clamping is stable. The circuit of the driving motor can be led out through the lower end of the rotating plate 4 and placed in the first guide groove 12, and the wiring will not be affected, and it is also easy to repair and maintain.

Claims

1. A numerical control device based on PLC control, comprising a base, a processing groove and a bracket opposite to the processing groove are provided on the base, a tool is provided on the bracket in a sliding fit connection, a first guide groove is embedded in the processing groove, and a mounting base plate is provided on the processing groove in a sliding fit connection, characterized in that: A first slider which is slidably adapted to the first guide groove is fixedly connected to the lower end of the mounting base plate, a rotating plate is rotatably connected to the mounting base plate, a plurality of clamps distributed in a circular array are installed on the rotating plate, a steering motor for driving the rotating plate to rotate relative to the mounting base plate is installed on the first slider, a limiting component for limiting the rotation of the rotating plate is provided on the side of the mounting base plate away from the first slider, and an adjusting button is elastically embedded on the mounting base plate; When the adjusting button moves downward, the adjusting button pulls the limit assembly to release the rotation restriction on the rotating plate, and the steering motor is started and drives the rotating plate to rotate. When the adjusting button moves upward, the steering motor stops rotating, the adjusting button releases the traction on the limit assembly, and the limit assembly restores the rotation restriction on the rotating plate.

2. A PLC-controlled numerical control device according to claim 1, characterized in that: The rotating plate is a cylindrical structure, and the arc surface periphery of the rotating plate is provided with side teeth in a ring array, and the side teeth are movably embedded in the mounting base plate.

3. A PLC-controlled numerical control device according to claim 2, characterized in that: The limit assembly includes two groups of limit plates rotatably arranged on one side of a rotating plate, the movable ends of the limit plates are arranged opposite to each other, the limit plates are arc-shaped plates, and serrations are evenly arranged on the side of the limit plates facing the side teeth. The limit plates are rotatably connected to the inside of the mounting base plate, and a torsion spring is connected between the limit plates and the mounting base plate. The torsion spring acts to rotate the two groups of limit plates toward one side of the rotating plate, and the serrations on the limit plates and the side teeth form a snap-fit ​​fit.

4. A PLC-controlled numerical control device according to claim 3, characterized in that: A third guide wheel is provided on the side of the two groups of limit plates away from the rotating plate, and the third guide wheel is fixedly installed in the mounting base plate. A traction rope is connected to the relatively close side of the two groups of limit plates, and the end of the traction rope away from the limit plate passes around the outer periphery of the corresponding third guide wheel and then merges to form a traction bundle, which is connected to the adjusting button.

5. A PLC-controlled numerical control device according to claim 4, characterized in that: The adjusting button includes a pressing plate slidably embedded in the upper end of the mounting base plate, the lower end of the pressing plate is connected to the mounting base plate through a supporting spring, a sliding rod is fixedly connected to the center of the lower end of the pressing plate, the sliding rod is slidably adapted to the mounting base plate, and a conductive joint is fixedly connected to the lower end of the sliding rod.

6. A PLC-controlled numerical control device according to claim 5, characterized in that: A second guide groove is embedded in the lower end of one side of the slide bar, a first guide wheel is fixedly connected to the mounting base plate, the first guide wheel is slidably fitted in the second guide groove, and a connecting rope is connected to the lower end of the second guide groove.

7. A PLC-controlled numerical control device according to claim 6, characterized in that: The end of the connecting rope away from the second guide groove passes around the first guide wheel, forms a right-angle bend and is then connected to a second slider. The second slider is provided with a plurality of through holes. The second slider is slidably connected to the mounting base plate in the horizontal direction. The end of the second slider away from the connecting rope is connected to the second guide wheel, and the end of the traction and combining device away from the rotating plate passes around the second guide wheel and is fixedly connected to the mounting base plate.

8. A PLC-controlled numerical control device according to any one of claims 1 to 7, characterized in that: An internal gear is embedded in the lower end of the rotating plate, and the steering motor is fixed to the side of the first slider facing the rotating plate through a mounting frame. The output end of the steering motor is transmission-connected to a driving wheel meshing with the internal gear. The rotating plate is hollow, and an inspection cover is assembled at the lower end of the rotating plate by threaded or screwed engagement.

9. A PLC-controlled numerical control device according to any one of claims 1 to 7, characterized in that: The clamp includes four groups of screw rods arranged in a cross-shaped array, and a clamping block is arranged on the outer periphery of the screw rods through threaded matching. The opposite ends of the screw rods are both sleeved and fixed with transmission wheels, and adjacent transmission wheels are meshed for transmission. One of the screw rod ends is transmission-connected to a drive motor.

10. A PLC-controlled numerical control device according to claim 9, characterized in that: The rotating plate is provided with a track groove opposite to the screw rod, the screw rod is rotatably connected in the track groove, the lower end of the clamping block is slidably adapted to the track groove, the opposite sides of the multiple groups of clamping blocks are arranged in an arc surface and have a serrated pattern, and the thread rotation directions of adjacent screw rods are opposite.

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