A fabric thickness adaptive cutting bed

Abstract

The present invention relates to the technical field of cutting tables. The purpose is to provide a cutting table with adaptive fabric thickness, comprising a bed and a horizontal gantry installed on the bed and capable of moving along the length direction of the bed, the gantry being provided with a machine table capable of moving along the length direction of the gantry, the machine table being provided with a head capable of moving vertically for carrying a cutting knife; the bed is a hollow bed, and a plurality of adsorption holes are provided on the top of the bed; a horizontal partition is provided inside the bed, and the partition divides the bed into an upper chamber and a lower chamber, and the two ends of the upper chamber and the lower chamber are connected to form a circulating air duct; a circulating fan is also provided inside the bed for promoting airflow to circulate in the circulating air duct. The present invention can form a stable adsorption force on the material on the surface of the bed to ensure the stability of cutting.

Description

Technical Field

[0001] The invention relates to the technical field of cutting tables, and in particular to a cutting table with adaptive fabric thickness. Background Art

[0002] The cutting table is a kind of equipment used in the processing of cloth, leather and other related products. Its main function is to cut the size and shape of the raw materials so that the raw materials meet the subsequent processing requirements. The introduction of the cutting table has greatly improved the accuracy of traditional manual cutting and improved the overall processing efficiency. At present, the gantry cutting table is a main form of various types of cutting tables, which includes a bed, a gantry frame that can move along the length direction of the bed driven by the Y-axis drive mechanism is arranged on the bed, and a machine table that can move along the width direction of the bed driven by the X-axis drive mechanism is arranged on the gantry frame; a machine head that can move vertically driven by the Z-axis drive mechanism is arranged on the machine table; and a cutting tool is arranged in the machine head. During the operation of the gantry cutting table, the raw materials are laid flat on the upper surface of the bed, and various forms of cutting of the raw materials are achieved through the combined movement of the cutting tool in the X, Y, and Z directions. However, the inventor found in the long-term use practice that the existing gantry cutting table still has the following defects in the application process, which need to be improved:

[0003] 1. Since the cutting machine needs to cut materials of various thicknesses and materials during its application, the current traditional practice is to directly input existing parameters such as raw material thickness on the main controller panel, and directly use the Z-axis drive mechanism to control the cutting depth of the cutting tool; however, this method has poor control accuracy because the Z-axis drive mechanism must coordinate the up and down movements of the machine head (lifting and lowering the knife) and control the cutting depth. Therefore, how to independently control the cutting depth at the machine head position and how to quickly and accurately detect the cutting depth have become the key to achieving cutting depth adjustment.

[0004] 2. In order to ensure the effective fixation of the raw materials on the bed, the existing cutting beds usually have an adsorption chamber at the bottom of the bed, the adsorption chamber is connected to a negative pressure fan, and adsorption holes connected to the adsorption chamber are opened on the surface of the bed. When in use, the gas in the adsorption chamber is pumped out by the negative pressure fan to form a negative pressure in the adsorption chamber, thereby adsorbing the raw materials on the surface of the cutting bed. However, this method causes high production noise during operation because the negative pressure fan needs to continuously pump the gas out. At the same time, since the porosity of raw materials of different thicknesses and materials is quite different, the gas permeability of the raw materials varies greatly during the process of covering the surface of the bed. In order to keep the negative pressure adsorption force constant, it is necessary to adaptively adjust the suction force of the negative pressure fan according to the raw materials of different thicknesses, which increases the complexity of adsorption force control.

[0005] 3. At present, most traditional gantry-type cutting machines use a screw nut pair as the X-axis drive mechanism to drive the machine to move on the gantry, thereby driving the cutting tool installed on the head to cut the raw materials. This method can meet the installation of conventional low-weight machines and heads, but with the increasing requirements for the diversification of cutting machine functions, more and more structures are integrated into the head, which leads to a significant increase in the overall weight of the head. This traditional form of using a screw nut pair as a drive mechanism is prone to deformation under long-term high weight loads, which in turn leads to reduced tooling accuracy, and ultimately affects the accuracy of material cutting. Summary of the invention

[0006] The object of the present invention is to provide a low-noise, stable-adsorption fabric thickness adaptive cutting table.

[0007] To achieve the above-mentioned invention object, the technical solution adopted by the present invention is: a fabric thickness adaptive cutting bed, comprising a bed body and a horizontal gantry installed on the bed body and capable of moving along the length direction of the bed body, the gantry is provided with a machine table capable of moving along the length direction of the gantry, and the machine table is provided with a head capable of moving vertically for carrying a cutting knife;

[0008] The bed body is a hollow bed body, and a plurality of adsorption holes are arranged on the top of the bed body; a horizontal partition is arranged inside the bed body, and the partition divides the bed body into an upper chamber and a lower chamber, and the two ends of the upper chamber and the lower chamber are connected to form a circulating air duct; a circulating fan is also arranged inside the bed body for promoting the airflow to circulate in the circulating air duct.

[0009] The beneficial effects of the present invention are mainly reflected in: being able to form a stable adsorption force on the material on the surface of the bed to ensure the stability of cutting. At the same time, due to the use of a built-in fan setting, the production noise can be greatly reduced. Specifically, during the application of the bed of the present invention, the traditional method of directly pumping air to the outside through a negative pressure fan is abandoned, and the circulating fan is installed inside the bed, which greatly reduces the noise hazard. In the process of adsorbing materials, the traditional cutting bed generates adsorption force through suction; while the present invention abandons the traditional idea, and through the rapid flow of air inside the bed, the gas in the circulating air duct forms a large flow rate difference with the external gas, and then forms a pressure difference, thereby achieving adsorption of the material on the surface of the bed. In this way, since the circulating fan does not need to be directly exposed outside the bed and does not directly exchange with the external gas, the production noise can be effectively alleviated through sound insulation and noise reduction treatment of the bed. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the present invention;

[0011] Figure 2 for Figure 1Enlarged view of part A in the middle;

[0012] Figure 3 It is a structural schematic diagram of the machine head;

[0013] Figure 4 This is a schematic diagram of the installation of the brake clamp;

[0014] Figure 5 It is a structural schematic diagram of the lower knife depth adjustment mechanism;

[0015] Figure 6 for Figure 5 Rear view of the structure shown in;

[0016] Figure 7 is a structural schematic diagram of a guide plate;

[0017] Figure 8 It is a schematic diagram of the structure of the detection probe plate;

[0018] Fig. 9 is a schematic diagram of the structure of the contact plate;

[0019] Fig.10 It is a bottom view of the top plate of the bed;

[0020] Fig.11 is a top view of the partition;

[0021] Fig.12 The figure is a schematic diagram of the structure of a preferred partition. DETAILED DESCRIPTION

[0022] like Figure 1-12 As shown, a cutting table is mainly used for cutting materials such as cloth and blanks, replacing the traditional manual cutting method to improve efficiency and cutting accuracy. Figure 1 As shown in the figure, the present invention comprises a bed 1 and a gantry 2 installed on the bed 1 and capable of moving along the length direction of the bed 1. The longitudinal movement of the gantry 2, i.e. Figure 1 The movement in the left and right directions forms the movement in the Y-axis direction. The gantry 2 is generally driven by a screw nut pair, and can also be pushed by a cylinder, a hydraulic cylinder, etc. Since there are many choices in the prior art, they are not repeated in the present invention. The gantry 2 is provided with a machine table 3 that can move along the length direction of the gantry 2, and the machine table 3 is provided with a head 5 that can move vertically and is used to carry a cutter 4. The machine table 3 is used to install the head 5, and the machine table 3 realizes lateral movement along the gantry 2, that is, movement in the X-axis direction. The head 5 can realize lifting movement on the machine table 3, that is, Z-axis movement, and through the movement in the XYZ three-axis directions, various forms of linear motion, curved motion, intermittent linear motion, intermittent curved motion, etc. can be formed.

[0023] Compared with the existing cutting tables, the main differences of the present invention are concentrated in three aspects: the adjustment of the cutting depth, the adsorption and leveling of materials, and the stability of the machine head movement. Among them, the adjustment of the cutting depth is mainly reflected in two major directions: the adjustment of the cutting depth of the cutting knife at the machine head end and the real-time detection of the material thickness. Below, the present invention makes a detailed description of the relevant improvements.

[0024] 1. Adjustment of cutting depth

[0025] like Figure 3 As shown in the figure, the machine head 5 of the present invention includes a housing 6 and a cutter 4. The cutter 4 is installed in the housing 6, and the lower part extends out of the housing 6. The present invention can be adapted to a common cutter 4 or a vibrating cutter. The cutter 4 is installed in the housing 6 through a lower cutter depth adjustment mechanism to achieve rapid adjustment of the lower cutter at the machine head end. A thickness detection mechanism for detecting the thickness of the material on the bed 1 is provided on one side of the housing 6 to achieve rapid material thickness detection.

[0026] From the perspective of the cutting depth adjustment direction at the machine head end

[0027] The lower knife depth adjustment mechanism of the present invention comprises a T-shaped lifting block 7 installed in the housing 6 and capable of vertical sliding. Figure 5 and 6 As shown in the figure, the head of the lifting block 7, that is, the transverse section of the T-shaped top, is provided with a strip-shaped adjustment hole 8 extending in the transverse direction, and a rotating disk 9 is provided on one side of the upper end of the lifting block 7. The rotating disk 9 is rotatably installed in the housing 6 through a disk shaft, and the disk shaft of the rotating disk 9 is transmission-connected with the depth adjustment motor 10, and is driven to rotate by the depth adjustment motor 10. An eccentric pin 11 is provided on the disk surface of the rotating disk 9 facing the lifting block 7, and the eccentric pin 11 is matched with the adjustment hole 8 and is inserted into the adjustment hole 8. A chuck 12 for clamping the cutter 4 is provided at the lower end of the lifting block 7.

[0028] During use, the cutting depth adjustment mechanism of the present invention first detects the material thickness on the bed through the thickness detection mechanism, and then the depth adjustment motor 10 moves according to the control command issued by the cutting bed control system to adjust the cutting depth. The adjustment process is as follows: the depth adjustment motor 10 rotates, driving the rotating disk 9 to rotate. During the rotation of the rotating disk 9, the eccentric pin 11 drives the lifting block 7 to rise and fall in the shell 6. Since the cutting knife 4 is fixedly set on the chuck 12 at the lower end of the lifting block 7, the movement of the lifting block 7 can drive the cutting knife 4 to rise and fall, thereby changing the cutting depth. The present invention adjusts the lifting and lowering of the cutting knife 4 by rotating the rotating disk 9. The stability and accuracy of the adjustment are excellent. At the same time, the response speed is fast and there is no pause. It is suitable for cutting materials of various thicknesses.

[0029] During the movement of the lifting block 7, in order to ensure the stability of its movement, Figure 3 and 6 As shown in the figure, the rear side of the rod of the lifting block 7 of the present invention is provided with a rear guide edge 13 extending vertically, and a guide card 14 matching the rear guide edge 13 is fixedly provided on the inner wall of the housing 6. The rear guide edge 13 is clamped in the guide card 14 and forms a vertical sliding fit with the guide card 14. On this basis, in order to further improve the stability, a better approach can also be that the front side of the rod of the lifting block 7 is provided with a front guide edge 15 extending vertically, and two groups of guide wheels 16 are provided on the left and right sides of the front guide edge 15, and the front guide edge 15 is clamped between the two groups of guide wheels 16. The guide wheel 16 is connected to the wheel seat 18 through a support arm 17, and the wheel seat 18 is fixedly provided on the two side walls of the housing 6. The support arm 17 preferably extends obliquely, so that when the support arm 17 provides a supporting force, it is mainly a pulling force and a compressive force on the cost 17, and the lateral shear force is relatively small, which can further alleviate the vibration of the support arm 17 during the adjustment process and further improve the stability.

[0030] At the same time, in order to ensure the stability of the eccentric pin 11, Figure 3 and 7 As shown, a guide plate 19 is fixedly provided on the inner wall of the housing 6 opposite to the rotating plate 9 of the lower knife depth adjustment mechanism of the present invention, and an annular guide groove 20 is provided on the plate surface of the guide plate 19 facing the rotating plate 9, and the end of the eccentric pin 11 is inserted into the guide groove 20 and forms a sliding fit with the guide groove 20. The overhanging end of the eccentric pin 11 is hemispherical, and the cross section of the guide groove 20 is semicircular and matched with the eccentric pin 11. The stability of the eccentric pin 11 during the rotation process can be ensured by the limiting guide of the guide groove 20 on the guide plate 19, and at the same time, the strength of the eccentric pin 11 during the force transmission process is ensured by supporting the two ends of the eccentric pin 11, and the influence of the flexibility of the eccentric pin 11 itself is reduced.

[0031] After the cutter 4 is adjusted to the right position, in order to effectively lock the position, Figure 3 and 4 As shown in , the lower knife depth adjustment mechanism also includes a locking assembly, which includes a brake disc 21 arranged on the disc shaft of the rotating disc 9, and two brake clamps 22 are arranged on the upper and lower sides of the brake disc 21, and a clamping pad 23 is arranged on the opposite side of the brake clamp 22. The brake clamps 22 can move in opposite directions to form a tight lock on the brake disc 21. Or move in opposite directions to form an unlocking of the brake disc 21. Regarding how to drive the brake clamp 22, there are many specific forms that can be adopted, for example, it can be an electromagnetic push rod, a small cylinder, etc. However, since the present invention is provided with two brake clamps 22, in order to ensure the synchronization of the movement of the two brake clamps 22, such as Figure 4As shown in , two vertical brake screws 24 are arranged side by side at both ends of the two brake clamps 22, and a connector 25 is arranged at the end of the brake clamp 22, and the connector 25 is sleeved on the brake screw 24 and forms a threaded fit with the brake screw 24. The brake screw 24 is connected to the brake motor 26 in a transmission connection. The brake motor 26 drives the brake screw 24 to move, which can drive the brake clamp 22 mounted thereon to move in the opposite or reverse direction. Generally, only one brake motor 26 can be provided, and the brake screws 24 are connected to each other through a synchronous wheel and a synchronous belt. The directions of the threads on the brake screw 24 corresponding to the two brake clamps 22 are opposite.

[0032] The motion stroke length of the cutter 4 of the present invention is fed back by the control signal of the depth adjustment motor 10, but in order to more accurately reflect the adjustment stroke of the cutter 4. The present invention can also be provided with a contact sensor 27 between the bottom of the lifting block 7 and the bottom of the shell 6, the proximity body of the contact sensor 27 is located on the lifting block 7, and the detection body of the contact sensor 27 is located on the shell 6. After adopting this method, each time an adjustment is made, the lifting block 7 first moves to the lowest limit position, at which time the contact sensor 27 is triggered to mark the zero position. The lifting block 7 is adjusted to rise and fall based on the zero position.

[0033] From the perspective of real-time detection of material thickness

[0034] like Figure 3 As shown in the figure, the thickness detection mechanism includes a detection probe plate 28 arranged on one side of the shell 6, the detection probe plate 28 is close to the outer surface of the shell 6, and forms a vertical sliding fit with the shell 6. Of course, in order to ensure the stability of the sliding fit, a better approach of the present invention can also be to combine Figure 3 and 8 As shown in the figure, a vertical, strip-shaped center hole 35 is provided at the center of the detection probe plate 28, and a matching guide block 36 is provided in the center hole 35, and the guide block 36 is fixedly mounted on the housing 6. On this basis, two vertical stabilizing grooves 37 are also provided on the side of the detection probe plate 28 facing the housing 6, and the stabilizing grooves 37 are symmetrically distributed on both sides of the center hole 35. Stabilizing strips matching the stabilizing grooves 37 are provided on the outer side wall of the housing 6, and the stabilizing strips are clamped in the stabilizing grooves 37. Through the matching of the guide block 36 and the center hole 35, and the matching of the stabilizing groove 37 and the stabilizing strip, the movement of the detection probe plate 28 of the present invention is extremely smooth.

[0035] Regarding the up and down driving of the detection probe plate 28, it can also be in various forms such as a cylinder, an electric push rod, etc. Figure 3As shown in , the detection probe plate 28 may also be driven by a detection motor 32 disposed at an upper portion of one side of the housing 6, the output end of the detection motor 32 facing downward, and connected to the upper end of a vertical detection screw 33. An elbow 34 is disposed at the upper end of the detection probe plate 28, and a screw hole matching the detection screw 33 is disposed on the elbow 34. The detection screw 33 is inserted into the screw hole and forms a threaded fit with the elbow 34. In this form, the upper end of the detection screw 33 is generally rotatably connected to the mounting frame of the detection motor 32, and the lower end is inserted into the guide block 36 and forms a rotational fit with the guide block 36.

[0036] like Figure 8 As shown in FIG. 1 , a U-shaped bottom plate 29 is provided at the bottom of the detection probe plate 28 of the thickness detection mechanism of the present invention, and the cutting knife 4 is located inside the U-shaped bottom plate 29. Fig. 9 As shown in FIG. 2 , a matching U-shaped contact plate 30 is further disposed below the bottom plate 29 , and a pressure sensor 31 is disposed between the contact plate 30 and the bottom plate 29 .

[0037] During use, after the material is laid on the bed 1, the thickness of the material is first detected by the thickness detection mechanism, and the detection method is as follows: the detection motor 32 drives the detection probe plate 28 to drop from the initial position to the theoretical lowest position, and its entire stroke length is the standard stroke length. When the material is laid on the bed 1, during the movement of the detection probe plate 28 according to the standard stroke length, the contact plate 30 on the detection probe plate 28 will first fully contact the material and trigger the pressure sensor 31. It means that the detection probe plate 28 has dropped to the actual lowest position, and the stroke length is the actual stroke length. At this time, the difference between the standard stroke length and the actual stroke length of the detection probe plate 28 is the thickness of the material. After the thickness detection is completed, the cutting depth of the cutter 4 is determined according to the detected material thickness. At the same time, during the cutting process, the detection probe plate 28 of the present invention can always keep pressing the material, and the U-shaped contact plate 30 can keep pressing the material around the active area of ​​the cutter 4 to avoid cutting errors caused by material dislocation. In order to ensure the smooth movement of the contact plate 30 under contact with the material, as Fig. 9 As shown in FIG. 1 , the bottom surface of the contact plate 30 is arc-shaped.

[0038] 2. Material adsorption and leveling

[0039] The present invention achieves stable adsorption and silent and noise-reducing adsorption by changing the adsorption mode of the bed 1. Figure 1As shown in the figure, the bed body 1 of the present invention is a hollow bed body, and a plurality of adsorption holes 38 are arranged on the top of the bed body 1. A transverse partition 39 is arranged inside the bed body 1, and the partition 39 divides the bed body 1 into an upper chamber 40 and a lower chamber 41. The two ends of the upper chamber 40 and the lower chamber 41 are connected to form a circulating air duct. A circulating fan for promoting airflow to circulate in the circulating air duct is also arranged inside the bed body 1.

[0040] During the adsorption application process, the bed 1 abandons the traditional method of directly pumping air to the outside through a negative pressure fan, and instead installs a circulating fan inside the bed 1, which greatly reduces the noise hazard. In the process of adsorbing materials, the traditional cutting bed generates adsorption force through suction. However, the present invention abandons the traditional idea. Through the rapid flow of air inside the bed 1, the gas in the circulating air duct and the external gas form a huge flow rate difference. As we all know, the faster the gas flow rate, the lower the pressure. Then a pressure difference is formed to achieve the adsorption of the material on the surface of the bed 1. In this way, since the circulating fan does not need to be directly exposed to the outside of the bed 1 and does not directly exchange with the external gas, the sound insulation and noise reduction treatment of the bed 1 can effectively alleviate the production noise. For example, a sound-absorbing cotton layer 44 is provided on the inner wall of the bed 1.

[0041] The bed 1 of the present invention generally has a circulating fan at one end of its partition 39 to promote the rapid flow of gas, but in order to further increase the air flow rate and enhance the circulation guidance of the air flow. Fig.11 As shown in FIG. 1 , a plurality of mounting holes are provided at both ends of the partition 39, and an axial flow fan 42 is provided in each of the mounting holes. The axial flow fans 42 at both ends of the partition 39 have opposite blowing directions, as shown in FIG. Figure 1 As shown in FIG. 4 , the axial flow fan 42 on the left side blows air upward, while the axial flow fan 42 on the right side blows air downward. Fig.10 As shown in , the inner surface of the top of the bed body 1 is provided with a plurality of diversion ridges 43 extending along the length direction of the bed body 1 in parallel. The arrangement of the diversion ridges 43 can make the gas flow faster and smoother, greatly improving the pressure difference without increasing the operating power of the axial flow fan 42, thereby ensuring the adsorption effect. In addition, by setting the partition 39 in a wave shape, it can also increase the flow rate to a certain extent and increase the pressure difference between the inside and outside of the bed body 1.

[0042] In addition, since it is inevitable that some impurities such as lint and lint residue will be sucked in during the adsorption process, a slag discharge port 45 is provided at the bottom of the bed 1, and a slag intercepting net 46 for intercepting impurities in the circulating airflow is provided at the slag discharge port 45. The slag intercepting net 46 can also be replaced by an air filter element, and the impurities in the circulating air duct can be intercepted and recovered through the design of the slag intercepting net 46.

[0043] 3. In terms of the stability of the machine head movement

[0044] Especially in terms of the stability of the lateral movement of the head 5, combined with Figure 1 and 2 As shown in FIG. 1 , the top of the gantry 2 is provided with a transverse guide rail 47 extending along the length direction of the gantry 2. The machine platform 3 includes a sliding seat 48 matched with the transverse guide rail 47, and a lifting body 49 arranged on the sliding seat 48. Figure 2 As shown in the figure, the cross section of the traverse guide rail 47 is generally square, but in fact, other shapes can be used, and the sliding seat 48 can be matched accordingly. The machine head 5 is installed on the side wall of the lifting body 49. The movement of the lifting body 49 can drive the machine head 5 to move up and down, so as to achieve the adjustment of lifting and pressing the knife.

[0045] like Figure 2 As shown in the figure, a driving rack 50 extending along the length direction of the traverse guide rail 47 is provided on the side away from the machine head 5 of the traverse guide rail 47 of the present invention, and a driving gear 51 is also provided on the sliding seat 48, and the driving gear 51 is drivingly connected with a traverse motor 52 fixedly provided on the sliding seat 48. The driving rack 50 is meshed with the driving gear 51. The present invention is particularly special in that the tooth surface of the driving rack 50 is a V-shaped surface, and the tooth surface of the driving gear 51 is composed of two conical surfaces that match the inclination of the V-shaped surface of the driving rack 50.

[0046] During the lateral movement of the machine platform 3 of the present invention, the lateral movement motor 52 is activated to drive the driving gear 51 to move. Since the driving gear 51 is meshed with the driving rack 50, the driving gear 51 can push the sliding seat 48 to move along the length direction of the driving rack 50, that is, the length direction of the lateral movement guide rail, that is, Figure 2 In addition to the limit fit formed directly by the transverse guide rail 47 and the sliding seat 48, the tooth surface of the driving rack 50 adopts a V-shaped design, and the tooth surface of the driving gear 51 adopts a double-conical surface design. Therefore, the driving rack 50 and the driving gear 51 can provide certain upper and lower limits in addition to providing walking power, thereby ensuring the stability of the overall operation of the machine 3. It is particularly suitable for use in occasions where the machine head 3 is heavy, and is suitable for adding more functional structures to the machine head 3, such as: dust removal, edge sealing, line drawing and other functional structures.

[0047] The drive rack 50 of the present invention can be formed directly on the transverse guide rail 47, but for the convenience of processing and maintenance, the transverse guide rail 47 is usually provided with a mounting groove 53, and the drive rack 50 is arranged in the mounting groove 53 and fixedly connected to the transverse guide rail 47. In order to further ensure the stability of the sliding seat 48 running on the transverse guide rail 47, the side of the transverse guide rail 47 opposite to the machine head 5 is provided with a front side guide groove 54 extending along the length direction of the transverse guide rail 47, and the sliding seat 48 is provided with a front side slider 55 matched with the front side guide groove 54. The front side slider 55 is clamped in the front side guide groove 54 and forms a sliding match with the front side guide groove 54.

[0048] Regarding the installation of the lifting body 49 and the specific lifting drive structure, there are many real-time methods of the present invention, and only one of the relatively simple methods is described here, such as Figure 1 As shown in , a vertical side plate 56 is provided on the side of the lifting body 49 close to the machine head 5, and a vertical slot 57 is provided on the side plate 56. The cross section of the lifting body 49 is H-shaped, and the two sides of the lifting body 49 are clamped on the side plates 56 on both sides of the slot 57, and form a sliding fit with the side plates 56. One side of the lifting body 49 is connected to the machine head 5 through a "F"-shaped connecting plate 0, and the other side is connected to the lifting drive assembly. The lifting drive assembly includes a lifting screw 58 and a lifting guide rod 59 arranged on the top of the sliding seat 48, and the lifting screw 58 is connected to the lifting motor 60 in transmission. An extension part 61 extending in the direction of the lifting screw 58 and the lifting guide rod 59 is provided on one side of the lifting body 49, and the lifting screw 58 and the lifting guide rod 59 are inserted in the extension part 61, and respectively form a threaded fit and a sliding fit with the extension part 61.

Claims

1. A fabric thickness adaptive cutting bed, comprising a bed body (1) and a horizontal gantry (2) mounted on the bed body (1) and capable of moving along the length direction of the bed body (1); a machine table (3) capable of moving along the length direction of the gantry (2) is arranged on the gantry (2); and a machine head (5) capable of moving vertically and used for carrying a cutting knife (4) is arranged on the machine table (3); Features: The bed body (1) is a hollow bed body, and a plurality of adsorption holes (38) are arranged on the top of the bed body (1); a transverse partition (39) is arranged inside the bed body (1), and the partition (39) divides the bed body (1) into an upper chamber (40) and a lower chamber (41), and the two ends of the upper chamber (40) and the lower chamber (41) are connected to form a circulating air duct; a circulating fan for promoting airflow to circulate in the circulating air duct is also arranged inside the bed body (1); The machine head (5) comprises a housing (6) and a cutting knife (4); the cutting knife (4) is installed in the housing (6) via a lower knife depth adjustment mechanism; a thickness detection mechanism for detecting the thickness of the material on the bed (1) is provided on one side of the housing (6); the lower knife depth adjustment mechanism comprises a T-shaped lifting block (7) installed in the housing (6) and capable of sliding vertically, The head of the lifting block (7) is provided with a strip-shaped adjustment hole (8) extending in the transverse direction; a rotating disk (9) is provided on one side of the upper end of the lifting block (7); the rotating disk (9) is rotatably mounted in the housing (6) via a disk shaft, and the disk shaft of the rotating disk (9) is transmission-connected to a depth adjustment motor (10); an eccentric pin (11) is provided on the disk surface of the rotating disk (9) facing the lifting block (7); the eccentric pin (11) matches the adjustment hole (8) and is inserted into the adjustment hole (8); a clamp (12) for clamping the cutting knife (4) is provided at the lower end of the lifting block (7); A rear guide edge (13) extending vertically is arranged on the back of the rod portion of the lifting block (7), and a guide card (14) matching with the rear guide edge (13) is arranged on the inner wall of the shell (6); the rear guide edge (13) is clamped in the guide card (14) and forms a vertical sliding fit with the guide card (14); A front guide edge (15) extending vertically is arranged on the front face of the rod portion of the lifting block (7); two groups of guide wheels (16) are arranged on the left and right sides of the front guide edge (15); the front guide edge (15) is clamped between the two groups of guide wheels (16); the guide wheels (16) are connected to wheel seats (18) via support arms (17); and the wheel seats (18) are fixedly arranged on the two side walls of the housing (6).

2. The fabric thickness adaptive cutting machine according to claim 1, characterized in that: A plurality of mounting holes are provided at both ends of the partition plate (39), and axial flow fans (42) are provided in the mounting holes; the axial flow fans (42) located at both ends of the partition plate (39) have opposite blowing directions.

3. The fabric thickness adaptive cutting machine according to claim 2, characterized in that: The inner surface of the top of the bed body (1) is provided with a plurality of drainage ridges (43) arranged side by side and extending along the length direction of the bed body (1).

4. The fabric thickness adaptive cutting machine according to claim 3, characterized in that: The partition (39) is wavy in shape.

5. The fabric thickness adaptive cutting machine according to claim 4, characterized in that: A sound-absorbing cotton layer (44) is provided on the inner wall of the bed body (1).

6. The fabric thickness adaptive cutting machine according to claim 5, characterized in that: The bottom of the bed (1) is also provided with a slag discharge port (45), and a slag blocking net (46) for intercepting impurities in the circulating air flow is provided at the slag discharge port (45).

7. The fabric thickness adaptive cutting machine according to claim 1, characterized in that: The lower knife depth adjustment mechanism also includes a locking component, which includes a brake disc (21) arranged on the disc shaft of the rotating disc (9), two brake clamps (22) are arranged on the upper and lower sides of the brake disc (21), and a clamping pad (23) is arranged on the opposite side of the brake clamp (22); the brake clamp (22) can move in opposite directions to form a clamping lock on the brake disc (21); or move in opposite directions to form an unlocking of the brake disc (21).

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