Double-saw-disc type numerical control stepped cushion block machining center equipment

By designing the dual-saw disc type CNC step pad machining center equipment and using front and rear and up and down adjustment devices, the problem of inconvenient adjustment of the double-saw disc position is solved, fast and accurate position adjustment is achieved, and processing efficiency and accuracy is improved.

CN222450678UActive Publication Date: 2025-02-11GAOMI HONGXIANG MECHANICAL & ELECTRICAL TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202421200547.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-29
Publication Date
2025-02-11
Estimated Expiration
2034-05-29

AI Technical Summary

Technical Problem

When processing step pads, the double saw plates are inconvenient to adjust the front and back or high and low positions, resulting in low working efficiency and poor adjustment accuracy.

Method used

A double saw disc type CNC step pad machining center equipment is designed, using front and rear adjustment devices and up and down adjustment devices. By rotating the rotor, the screw and slide plate are driven to move forward and backward and up and down movements of motor A and motor B, and the level is quickly adjusted. The position of saw plate and vertical saw plate.

Benefits of technology

The position of horizontal saw disk and vertical saw disk is achieved quickly and accurately adjusts the position of the horizontal saw disk, without the need to disassemble the motor, and improves processing efficiency and accuracy.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses double-saw-disc type numerical control stepped cushion block machining center equipment which comprises a base, a left-right moving module is installed on the front side of the top face of the base, a tool table is installed on the left-right moving module, a front-back moving module is installed on the rear side of the top face of the base, and a rack is installed on the front-back moving module. An up-down moving module is installed on the front side of the rack, a loading frame is installed on the up-down moving module, a motor A is installed on the front side of the loading frame through a front-back adjusting device, a motor B is installed on the front side of the loading frame through an up-down adjusting device, a horizontal saw disc is installed at the output end of the motor A, and a vertical saw disc is installed at the output end of the motor B. The front-back or high-low positions of the horizontal saw disc and the vertical saw disc can be rapidly changed through the front-back adjusting device and the up-down adjusting device, operation is convenient and fast, and stability is high.
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Description

Technical Field

[0001] The utility model belongs to the technical field of numerical control wood processing equipment, in particular to a double saw disc type numerical control step pad processing center equipment. Background Art

[0002] The wooden step pad is used to support the coil, winding or other parts of the transformer to ensure its structural stability. It also plays the role of isolation and prevention of current leakage, ensuring the safe and stable operation of the transformer. The processing of wooden step pads requires the saw disc to form a stepped structure through cross-cutting and longitudinal cutting. A single saw disc needs to constantly change the direction of the saw disc or the wood block to process the operation, which greatly reduces the work efficiency. Double vertical saw discs are used for processing operations to facilitate processing and production. The double saw disc needs to adjust the front and back and the height position of the saw disc so that the front end of the horizontal saw disc and the bottom end of the vertical saw disc are on the same horizontal line, so that the cross-cut and longitudinal sections at the step angle intersect. The way to adjust the position of the saw disc is to change the installation position of the motor for adjustment, and then fix the motor position with bolts. This adjustment method is slow and has low adjustment accuracy. It takes multiple adjustments to make the front end of the horizontal saw disc and the bottom end of the vertical saw disc on the same horizontal line. Utility Model Content

[0003] The utility model aims to provide a double-saw disc type numerically controlled step pad processing center device, which solves the problem that the front and rear or high and low positions of the double-saw discs are inconvenient to adjust.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A double-saw disk CNC step pad machining center equipment, including a base, a left-right moving module is installed on the front side of the top surface of the base, a workbench is installed on the left-right moving module, a front-back moving module is installed on the rear side of the top surface of the base, a frame is installed on the front-back moving module, an up-and-down moving module is installed on the front side of the frame, a loading frame is installed on the up-and-down moving module, a motor A is installed on the front side of the loading frame through a front-and-back adjusting device, a motor B is installed through an up-and-down adjusting device, a horizontal saw disk is installed on the output end of the motor A, and a vertical saw disk is installed on the output end of the motor B; the front-and-back adjusting device includes a fixed plate A, a screw rod A, a rotating wheel A, a guide rod A, a slide plate A, a screw hole A, a guide hole A, a mounting plate, a connecting seat, and a folding plate, the fixed plates A are two on the left and right, which are vertically fixed to the front side of the loading frame, a screw rod A is vertically connected to the middle of the two fixed plates A, and guide rods A are vertically fixed up and down, and the left end of the screw A is fixed A rotating wheel A is fixed, and the two skateboards A are located between the fixed plate A and are symmetrical in left and right positions. A screw hole A is opened in the middle of the skateboard A, and guide holes A are opened at the top and bottom. The screw hole A is threadedly connected to the screw rod A, and the guide hole A is slidably connected to the guide rod A. The mounting plate is fixed to the motor A with bolts, and a vertical connecting seat is fixed at the center of the back of the mounting plate. One end of the two folding plates is hinged to the two skateboards A respectively, and the other end is hinged to the connecting seat respectively; the up and down adjustment device comprises a fixed plate B, a screw rod B, a rotating wheel B, a guide rod B, a skateboard B, a screw hole B, and a guide hole. The fixed plate B is divided into two upper and lower parts, which are horizontally fixed to the front side of the carrier. The middle parts of the two fixed plates B are vertically connected with the screw rods B, and the guide rods B are vertically fixed on the left and right. A rotating wheel B is fixed on the top of the screw B. A screw hole B is opened in the center of the skateboard B, and guide holes are opened on the left and right. The screw B is threadedly connected to the screw hole B, and the guide hole is slidably connected to the guide rod B.

[0006] Preferably, the left and right threads of the screw rod A are in opposite directions, and the threads in opposite directions are respectively threadedly connected to the two screw holes A, and the slide plate A moves in relative directions.

[0007] Preferably, vertical balancing cylinders are fixed to the left and right sides of the frame respectively, cylinder brackets with corresponding positions are fixed to the left and right sides of the loading frame respectively by bolts, and the output end of the balancing cylinder is fixed to the corresponding cylinder bracket.

[0008] Preferably, a protective cover is installed in a closed manner above the base contour, a sliding door is installed on the front side of the protective cover, observation windows are installed on the left and right sides, and a control panel is installed on the front side of the protective cover.

[0009] Preferably, a dust removal device is provided on the top of the loading frame, and the dust removal device includes a dust removal hood, a right-angle frame, and a dust removal bellows. The dust removal hood is trumpet-shaped and is fixed to the top of the loading frame through the right-angle frame. The top of the dust removal hood is connected to the dust removal bellows, and the end of the dust removal bellows is fixed to the protective cover and connected to the external fan.

[0010] Preferably, at least one wood chip removal device is provided between the connection between the base and the protective cover, and the wood chip removal device includes a suction head, a chip removal bellows, and a baffle. The suction head passes through the protective cover and is located at the top of the base. The outer end of the suction head is connected to the chip removal bellows and is connected to the external fan. A baffle is fixed to the front end of the suction head, and the baffle is in contact with the inner side of the protective cover.

[0011] Preferably, a metal sheet is bonded to the inner side surface of the baffle, a magnetic sheet is fixed on the protective cover corresponding to the metal sheet, and the metal sheet is adsorbed to the magnetic sheet.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1) The forward and backward moving module connected to the motor A can rotate the wheel A to make the screw A drive the two slides A to move relative to each other, change the bending angle of the folding plate, realize the forward and backward movement of the motor A, and make the horizontal saw disc freely change its forward and backward position. The up and down adjustment device connected to the motor B can rotate the wheel B to make the screw B drive the slide B to move up and down, and synchronously drive the motor B to move, and freely change the height of the vertical saw disc. There is no need to disassemble the motor. The horizontal and vertical saw discs are adjusted by manually rotating the wheels A and B, so that the ends of the two saw discs can quickly reach the specified position, and the threaded transmission has high stability;

[0014] 2) The dust removal cover of the dust removal device can quickly extract the flying dust generated by the horizontal saw disc and the vertical saw disc through the external dust removal bellows, ensuring that after the step pad is processed, it is convenient for manual entry into the protective cover for replacement;

[0015] 3) The sawdust generated after cutting can be swept to the suction head of the sawdust removal device for cleaning. The suction head is adsorbed and adhered to the inner wall of the protective cover through the magnetic suction sheet and metal. For sawdust that is inconvenient to clean, the suction head can be manually pulled out and moved to the sawdust for suction, thereby speeding up the cleaning efficiency of the sawdust. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a side view of the utility model;

[0018] Figure 3 This is a schematic diagram of the appearance structure of the front and rear adjustment device of the utility model;

[0019] Figure 4 This is a top view of the front and rear adjustment device of the utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the up and down adjustment device of the utility model;

[0021] Figure 6 It is a schematic diagram of the structure of the protective cover of the utility model;

[0022] Figure 7 is a schematic diagram of the structure of the dust removal device of Example 2;

[0023] Figure 8 is a cross-sectional view of a wood chip removal device in Example 3;

[0024] Icons: 1. Base; 11. Protective cover; 12. Sliding door; 13. Observation window; 14. Control panel; 2. Left and right moving module; 21. Workbench; 3. Forward and backward moving module; 31. Rack; 32. Balance cylinder; 33. Cylinder bracket; 4. Up and down moving module; 41. Loading rack; 5. Forward and backward adjustment device; 51. Fixing plate A; 52. Screw rod A; 53. Rotating wheel A; 54. Guide rod A; 55. Slide plate A; 56. Screw hole A; 57. Guide hole A; 58. Mounting plate; 59. Connecting seat ; 510, folding plate; 6, motor A; 61, horizontal saw disc; 7, up and down adjustment device; 71, fixing plate B; 72, screw rod B; 73, rotating wheel B; 74, guide rod B; 75, slide plate B; 76, screw hole B; 77, guide hole; 8, motor B; 81, vertical saw disc; 9, dust removal device; 91, dust removal hood; 92, right angle bracket; 93, dust removal bellows; 10, wood chip removal device; 101, suction head; 102, chip removal bellows; 103, baffle; 104, metal sheet; 105, magnetic sheet. DETAILED DESCRIPTION

[0025] In order to make the purpose, method scheme and advantages of the embodiments of the utility model clearer, the method scheme in the embodiments of the utility model is clearly and completely described. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings herein can be arranged and designed in various different configurations.

[0026] Example 1

[0027] like Figure 1-6 As shown, a double-saw disk CNC step pad machining center equipment includes a base 1, a left-right moving module 2 is installed on the front side of the top surface of the base 1, a tooling table 21 is installed on the left-right moving module 2, and the tooling table 21 is used for clamping and fixing the wood block to be cut by a tooling fixture, a front-back moving module 3 is installed on the rear side of the top surface of the base 1, a frame 31 is installed on the front-back moving module 3, an up-down moving module 4 is installed on the front side of the frame 31, and a loading frame 41 is installed on the up-down moving module 4, wherein the left-right moving module 2, the front-back moving module 3 and the up-down moving module 4 adopt a ball screw and linear guide collaborative transmission mode, and adopt a PLC control system, and its internal structure is the existing technology and will not be repeated.

[0028] The front side of the loading frame 41 is installed with a motor A6 through a front-and-rear adjustment device 5, and a horizontal saw disc 61 is installed at the output end of the motor A6. The front-and-rear adjustment device 5 includes a fixed plate A51, a screw rod A52, a rotating wheel A53, a guide rod A54, a slide plate A55, a screw hole A56, a guide hole A57, a mounting plate 58, a connecting seat 59, and a folding plate 510. The fixed plates A51 are two on the left and right sides, which are vertically fixed to the front side of the loading frame 41. The middle of the two fixed plates A51 is vertically connected with a screw rod A52, and a guide rod A54 is vertically fixed up and down. The left end of the screw A52 is fixed with a rotating wheel A53, which can manually drive the screw A 52 rotates, the two slide plates A55 are located between the fixed plate A51, and the left and right positions are symmetrical, a screw hole A56 is opened in the middle of the slide plate A55, and a guide hole A57 is opened at the top and bottom, the left and right threads of the screw rod A52 are opposite, and the threads in opposite directions are respectively threadedly connected with the two screw holes A56, and the guide hole A57 is slidably connected with the guide rod A54, and the slide plate A55 moves in the relative direction, the mounting plate 58 is bolted to the motor A6, and a vertical connecting seat 59 is fixed at the back center of the mounting plate 58, and one end of the two folding plates 510 is respectively hinged to the two slide plates A55, and the other end is respectively hinged to the connecting seat 59. By rotating the screw rod A52, the two slide plates A55 are relatively moved, the bending angle of the folding plate 510 is changed, and the motor A6 and the horizontal saw disc 61 are moved forward and backward, and the adjustment is convenient and quick.

[0029] The front side of the loading frame 41 is equipped with a motor B8 through an up-and-down adjustment device 7, and a vertical saw disk 81 is installed at the output end of the motor B8; the up-and-down adjustment device 7 includes a fixing plate B71, a screw rod B72, a rotating wheel B73, a guide rod B74, a slide plate B75, a screw hole B76, and a guide hole 77. The fixing plates B71 are two, one above the other, and are horizontally fixed to the front side of the loading frame 41. The middle of the two fixing plates B71 is vertically connected with a screw rod B72, and the guide rods B74 are vertically fixed on the left and right. The top of the screw rod B72 is fixed with a rotating wheel B73. The slide plate B75 has a screw hole B76 in the center and guide holes 77 on the left and right. The screw rod B72 is threadedly connected to the screw hole B76, and the guide hole 77 is slidably connected to the guide rod B74, so that the slide plate B75 can slide up and down. By rotating the screw rod B72, the slide plate B75 drives the motor B8 and the vertical saw disk 81 to move up and down.

[0030] Furthermore, the frame 31 is fixed with vertical balancing cylinders 32 on the left and right sides, and the loading frame 41 is fixed with cylinder brackets 33 at corresponding positions on the left and right sides by bolts, and the output end of the balancing cylinder 32 is fixed with the corresponding cylinder bracket 33. The balancing cylinder 32 is connected to the loading frame 41 to assist the operation of the up and down moving module 4. The balancing cylinder 32 realizes precise control of the loading frame 41 by controlling the pressure of the air source, thereby enhancing the stability of the movement of the loading frame 41.

[0031] Furthermore, a protective cover 11 is installed in a closed manner above the outline of the base 1 to prevent flying dust from flying into the workshop and protect the safety of the workers. A sliding door 12 is installed on the front side of the protective cover 11, and observation windows 13 are installed on the left and right sides to allow the workers to observe the processing progress of the step pads in real time. A control panel 14 is installed on the front side of the protective cover 11 to control the operation of the equipment.

[0032] In the specific implementation process, the tooling table 21 clamps the wood block to be cut by the tooling fixture. Before processing, the front end of the horizontal saw disc 61 and the bottom end of the vertical saw disc 81 need to be adjusted to be on the same horizontal line. Figure 2 As shown;

[0033] Front-to-rear adjustment of the horizontal saw disc 61: By manually rotating the wheel A53, the screw A52 with opposite threads drives the two slide plates A55 to move relative to each other on the guide rod A, so that the folding plate 510 changes the bending angle, and the motor A6 and the horizontal saw disc 61 move forward and backward, so that the front end of the horizontal saw disc 61 moves to the plane where the vertical saw disc 81 is located. Manually rotating the wheel A53 can realize the rapid adjustment of the front-to-rear position of the horizontal saw disc 61;

[0034] Vertical saw disc 81 is adjusted up and down: by manually rotating the wheel B73, the screw B72 drives the slide plate B75 to slide up and down along the guide rod B74, so that the motor B8 and the vertical saw disc 81 move synchronously, so that the bottom end of the vertical saw disc 81 moves to the plane where the horizontal saw disc 61 is located, and manually rotating the wheel B73 realizes the rapid adjustment of the vertical saw disc 81 up and down;

[0035] After the positions of the horizontal saw disc 61 and the vertical saw disc 81 are quickly adjusted manually, the front end of the horizontal saw disc 61 and the bottom end of the vertical saw disc 81 are located on the same horizontal line, which is convenient and fast to operate, with high stability, and no need to disassemble the motor. Secondly, the equipment is started through the control panel 14, and the front and rear moving modules 3 and the up and down moving modules 4 are controlled by the PLC control system to automatically move the horizontal saw disc 61 and the vertical saw disc 81 to the specified height according to the coordinate point. The horizontal movement of the left and right moving module 2 can make the horizontal saw disc 61 and the vertical saw disc 81 successively cut the horizontal and vertical surfaces of the ladder on the wood block. After multiple moving processes, the wood block can complete the molding of the ladder pad.

[0036] Example 2

[0037] In order to enable the flying dust generated by the cutting of the horizontal saw disc 61 and the vertical saw disc 81 to be promptly drawn out of the protective cover 11, improvements are made on the basis of Example 1, such as Figure 7 As shown, in this embodiment, a dust removal device 9 is provided on the top of the loading frame 41, and the dust removal device 9 includes a dust removal hood 91, a right-angle frame 92, and a dust removal bellows 93. The dust removal hood 91 is trumpet-shaped with a large opening and a wide absorption range. The opening faces downward and is located above the horizontal saw disk 61 and the vertical saw disk 81, so as to facilitate the extraction of flying dust in the first time. The right-angle frame 92 is bolted to the top of the loading frame 41. A dust removal bellows 93 is installed on the top of the dust removal hood 91 through a clamp. The dust removal bellows 93 is retractable and can move with the loading frame 41. The end of the dust removal bellows 93 is fixed to the protective cover 11 and connected to the external fan.

[0038] During the specific implementation process, the dust removal hood 91 extracts the flying dust generated by the horizontal saw disk 61 and the vertical saw disk 81, and the flying dust is extracted out of the protective hood 11 through the dust removal bellows 93, which is convenient for centralized collection and cleaning, speeds up the cleaning speed of the flying dust, and also facilitates the subsequent replacement of finished parts by the staff.

[0039] Example 3

[0040] In order to facilitate the cleaning of the wood chips generated by the cutting of the horizontal saw disc 61 and the vertical saw disc 81, an improvement is made on the basis of Example 2, such as Figure 7-8 As shown, in this embodiment, at least one wood chip removal device 10 is arranged between the connection between the base 1 and the protective cover 11, and the wood chip removal device 10 includes a suction head 101, a chip removal bellows 102, and a baffle 103. The suction head 101 passes through the protective cover 11 and is located at the top of the base 1. The outer end of the suction head 101 is connected to the chip removal bellows 102 and connected to the external fan. A baffle 103 is fixed to the front end of the suction head 101, and the baffle 103 is in contact with the inner side of the protective cover 11.

[0041] Furthermore, a metal sheet 104 is bonded to the inner side of the baffle 103 , and a magnetic sheet 105 is fixed to the protective cover 11 corresponding to the metal sheet 104 . The metal sheet 104 and the magnetic sheet 105 are adsorbed to facilitate the fitting of the suction head 101 and the protective cover 11 .

[0042] During the specific implementation process, the wood chips generated by the cutting of the horizontal saw disk 61 and the vertical saw disk 81 can be cleaned and accumulated at the suction head 101. The wood chips can be cleaned into the suction head 101 for cleaning, or the suction head 101 can be pulled out and aimed at the difficult-to-clean position for suction, thereby increasing the efficiency of wood chip cleaning and reducing the difficulty of wood chip cleaning.

[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A double saw disc type CNC step pad machining center device, comprising a base (1), characterized in that: A left-right moving module (2) is installed on the front side of the top surface of the base (1), and a workbench (21) is installed on the left-right moving module (2); a front-back moving module (3) is installed on the rear side of the top surface of the base (1), and a frame (31) is installed on the front-back moving module (3); a vertical moving module (4) is installed on the front side of the frame (31), and a loading frame (41) is installed on the vertical moving module (4); a motor A (6) is installed on the front side of the loading frame (41) through a front-back adjusting device (5), and a motor B (8) is installed through an up-down adjusting device (7); a horizontal saw disc (61) is installed on the output end of the motor A (6), and a vertical saw disc (81) is installed on the output end of the motor B (8); The front-rear adjustment device (5) comprises a fixing plate A (51), a screw rod A (52), a rotating wheel A (53), a guide rod A (54), a slide plate A (55), a screw hole A (56), a guide hole A (57), a mounting plate (58), a connecting seat (59), and a folding plate (510). The fixing plates A (51) are two on the left and right sides, which are vertically fixed to the front side of the loading frame (41). The middle parts of the two fixing plates A (51) are vertically connected with the screw rod A (52), and the guide rod A (54) is vertically fixed above and below. The left end of the screw rod A (52) is fixed with the rotating wheel A (53). The two slide plates A (55) is located between the fixing plates A (51) and is symmetrical on the left and right. A screw hole A (56) is opened in the middle of the slide plate A (55), and guide holes A (57) are opened at the top and bottom. The screw hole A (56) is threadedly connected to the screw rod A (52), and the guide hole A (57) is slidably connected to the guide rod A (54). The mounting plate (58) is bolted to the motor A (6). A vertical connecting seat (59) is fixed at the center of the back of the mounting plate (58). One end of the two folding plates (510) is respectively hinged to the two slide plates A (55), and the other end is respectively hinged to the connecting seat (59); The upper and lower adjustment device (7) comprises a fixing plate (71), a screw rod (72), a rotating wheel (73), a guide rod (74), a slide plate (75), a screw hole (76), and a guide hole (77). The fixing plate (71) consists of two upper and lower plates, which are horizontally fixed to the front side of the carrier (41). The middle parts of the two fixing plates B (71) are vertically connected with a screw rod (72), and the guide rods B (74) are vertically fixed on the left and right. The top of the screw rod B (72) is fixed with a rotating wheel B (73). The slide plate B (75) has a screw hole B (76) in the center and guide holes (77) on the left and right. The screw rod B (72) is threadedly connected to the screw hole B (76), and the guide hole (77) is slidably connected to the guide rod B (74).

2. A double saw disc type CNC step pad machining center equipment according to claim 1, characterized in that: The left and right threads of the screw rod A (52) are in opposite directions, and the threads in opposite directions are respectively threadedly connected to the two screw holes A (56), and the slide plate A (55) moves in opposite directions.

3. The double saw disc type CNC step pad machining center equipment according to claim 1 is characterized in that: The frame (31) is respectively fixed with vertical balancing cylinders (32) on the left and right sides, and the loading frame (41) is respectively fixed with cylinder brackets (33) at corresponding positions by bolts on the left and right sides, and the output end of the balancing cylinder (32) is fixed to the corresponding cylinder bracket (33).

4. The double-saw disc CNC step pad machining center equipment according to claim 1 is characterized in that: A protective cover (11) is installed in a closed manner above the base (1) profile, a sliding door (12) is installed on the front side of the protective cover (11), observation windows (13) are installed on the left and right sides, and a control panel (14) is installed on the front side of the protective cover (11).

5. The double-saw disc CNC step pad machining center equipment according to claim 4 is characterized in that: A dust removal device (9) is arranged on the top of the loading frame (41), and the dust removal device (9) comprises a dust removal cover (91), a right angle frame (92), and a dust removal bellows (93). The dust removal cover (91) is in a bell-mouth shape and is fixed to the top of the loading frame (41) through the right angle frame (92). The top of the dust removal cover (91) is connected to the dust removal bellows (93). The end of the dust removal bellows (93) is fixed to the protective cover (11) and connected to an external fan.

6. The double-saw disc CNC step pad machining center equipment according to claim 4 is characterized in that: At least one sawdust removal device (10) is arranged between the connection between the base (1) and the protective cover (11), and the sawdust removal device (10) comprises a suction head (101), a sawdust removal bellows (102), and a baffle (103); the suction head (101) passes through the protective cover (11) and is located at the top of the base (1); the outer end of the suction head (101) is connected to the sawdust removal bellows (102) and is connected to an external fan; the front end of the suction head (101) is fixed with a baffle (103); the baffle (103) is in contact with the inner side of the protective cover (11).

7. The double saw disc type CNC step pad machining center equipment according to claim 6 is characterized in that: A metal sheet (104) is bonded to the inner side of the baffle (103), a magnetic sheet (105) is fixed on the protective cover (11) corresponding to the metal sheet (104), and the metal sheet (104) is adsorbed to the magnetic sheet (105).