CNC multi-axis mortise and tenon machine and method of using the same

Abstract

The present invention discloses a CNC multi-axis mortise and tenon machine and a method for using the same, comprising a base, a left-right moving device, an up-down moving device and a mortise and tenon head, wherein the mortise and tenon head is arranged on the up-down moving device, the up-down moving device is arranged on the left-right moving device, and the right moving device is arranged on the base, so that the mortise and tenon head can move up-down-left-right to process wood. The present invention provides a CNC multi-axis mortise and tenon machine and a method for using the same, which can blow wood chips and dust in the groove into an automatic dust suction device during normal mortise and tenon processing, so that the processed groove hole is clean, and at the same time, the wood chips and dust in the processing area are effectively cleaned, thereby improving the cleanliness of the working area and the environmental protection level of the equipment, and when the temperature of the rotating cutter head rises, the rotating cutter head can be automatically cooled, and the feed speed is slowed down to protect the rotating cutter head from being damaged, thereby improving the mortise and tenon quality, improving the mortise and tenon efficiency, and reducing the equipment failure rate.

Description

Technical Field

[0001] The invention relates to the technical field of mortise and tenon machines, in particular to a numerically controlled multi-axis mortise and tenon machine and a use method thereof. Background Art

[0002] The CNC multi-axis mortise and tenon machine is a woodworking machine tool for processing rectangular mortises or waist-shaped mortises on wood. It has multiple mortise and tenon heads and can process multiple wood blocks at the same time, thus having a higher processing efficiency.

[0003] In the process of processing multiple wood blocks at the same time, there are many cases where different woods are mixed for processing, and the hardness of different woods is different, especially the wood in the rosewood category has a higher hardness, and the ordinary CNC multi-axis mortise and tenon machine can only process the wood according to the feed speed set by the program. Therefore, when processing wood mixed with rosewood, it cannot automatically slow down the feed speed, resulting in large roughness of the processed groove holes, and serious wear of the tool. In severe cases, the tool head may even be broken, causing damage to the processing equipment. Summary of the invention

[0004] The invention aims at the deficiencies in the prior art and provides a numerically controlled multi-axis mortise and tenon machine and a method for using the same.

[0005] To solve the above technical problems, the present invention is solved through the following technical solutions: a CNC multi-axis mortise and tenon machine, comprising a base, a left-right moving device, an up-down moving device and a mortise and tenon head, the mortise and tenon head is arranged on the up-down moving device, the up-down moving device is arranged on the left-right moving device, and the right moving device is arranged on the base, so that the mortise and tenon head can move up and down, left and right to process wood, a rotating cutter head and a control device are arranged on the mortise and tenon head, the mortise and tenon head comprises a hollow shaft motor, a rotating joint is arranged at the upper end of the hollow shaft motor, a rotating cutter head is connected at the lower end, an air inlet is arranged at the upper end of the rotating cutter head, an air jet is opened at the cutting edge of the lower end, the air jet is connected with the air inlet at the upper end through an internal channel, after the rotating cutter head is installed on the mortise and tenon head, the lower end of the hollow shaft of the hollow shaft motor is connected with the air inlet, the control device comprises an air inlet pipe, an impeller and a sliding variable resistance device, one end of the air inlet pipe is connected with an external high-pressure air source, and the other end is connected to the rotating joint, so as to provide The rotating cutter head is supplied with air, and the rotation of the impeller is arranged on the air inlet pipe. When there is air flow in the air inlet pipe, the impeller can be driven to rotate. The sliding variable resistance device is connected to the power supply circuit of the driving motor of the left and right moving device. The sliding variable resistance device can automatically adjust the resistance value according to the rotation speed of the impeller, thereby changing the rotation speed of the driving motor. A sliding groove is provided on the air jet port, and a switch plate is elastically and slidably provided in the sliding groove. A temperature sensing cavity is provided in the rotating cutter head, and a bimetallic strip is provided in the temperature sensing cavity. One end of the bimetallic strip is fixedly arranged in the temperature sensing cavity, and the other end is connected to one end of a pull rope, and the other end of the pull rope is connected to the rear end of the switch plate. When the temperature of the rotating cutter head rises, the bimetallic strip is deformed and bent, thereby pulling the switch plate to open, and compressed gas is ejected from the air jet port, and the rotating cutter head is cooled by compressed air. At the same time, the outflow of compressed gas drives the impeller in the air inlet pipe to rotate, thereby increasing the resistance of the sliding variable resistance device connected to the power supply circuit, thereby slowing down the rotation speed of the driving motor.

[0006] Its beneficial effect is that when the temperature of the rotating cutter head rises, it can automatically cool down the rotating cutter head and slow down the feed speed to protect the rotating cutter head from damage, while improving the quality of the mortise and tenon, improving the efficiency of the mortise and tenon, and reducing the equipment failure rate.

[0007] In the above scheme, preferably, the control device also includes an air pump, the rotating shaft of the air pump is connected to the impeller, the sliding variable resistance device includes an air cylinder, a sliding rod and a resistance coil, all of which are arranged vertically to the ground, a first magnetic block is slidingly arranged in the air cylinder, an air chamber is arranged at the lower end of the air cylinder, the first magnetic block presses on the upper end of the air chamber, an air outlet is opened at the lower end of the air chamber, the side of the air chamber is connected with the air outlet of the air pump through a pipeline, so that all the gas generated by the air pump enters the air chamber, a variable resistance slider is slidingly arranged on the sliding rod, the variable resistance slider always presses on the resistance coil when sliding on the sliding rod, and a rear end surface of the variable resistance slider is arranged There is a second magnetic block, and the second magnetic block and the first magnetic block are magnetically attracted to each other via the cylinder cavity wall, and one end of the variable resistance slider and the resistance coil are connected to the motor power supply line of the left and right moving device through a wire. The impeller rotates to drive the air pump to work. When the air pump initially rotates, compressed air is generated and can flow out from the air outlet. After the speed of the air pump increases, the compressed gas generated by it cannot flow out from the air outlet at the first time. The compressed gas pushes the first magnetic block to slide upward, thereby driving the variable resistance slider to slide upward, and connecting more resistors to the power supply line of the drive motor, thereby reducing the speed of the drive motor.

[0008] In the above scheme, preferably, it also includes an automatic dust collection device, which includes an elastic telescopic cover, which is sleeved on the rotating cutter head, and a dust collection pipe is connected to the upper end of the elastic telescopic cover. The dust collection pipe can generate negative pressure to suck out impurities in the elastic telescopic cover.

[0009] In the above scheme, preferably, the switch plate is provided with ventilation holes, and when the rotating cutter head processes the wood, the lower end of the elastic telescopic cover elastically presses against the surface of the wood. At this time, the rotating cutter head sprays compressed air outward through the ventilation holes, so that the wood chips and dust generated by the processing fly upward into the elastic telescopic cover, assisting the automatic dust collection device to collect dust.

[0010] In the above scheme, preferably, the air holes are 0-0.mm, and the air output of the air holes is small, and is only used to assist in blowing wood chips and dust upwards.

[0011] Its beneficial effect is that during normal mortise and tenon processing, the wood chips and dust in the groove can be blown into the automatic dust suction device, so that the processed groove hole is clean, and at the same time, the wood chips and dust in the processing area are effectively cleaned, thereby improving the cleanliness of the working area and improving the environmental protection level of the equipment.

[0012] How to use CNC multi-axis tenon and groove machine:

[0013] S1: Place the wood on the base and clamp it, turn on the equipment, the rotary cutter head starts to rotate, the up and down moving device drives the mortise head to descend, and the left and right moving device drives the mortise head to move horizontally.

[0014] S2: The air holes on the rotating cutter head blow out air, blowing wood chips and dust into the elastic telescopic cover, and then sucked out through the dust suction pipe.

[0015] S3: When the temperature of the rotary cutter head rises, the switch plate automatically opens and compressed air flows out from the air jet, thereby cooling the rotary cutter head.

[0016] S4: Compressed air flows out from the jet port, driving the impeller to rotate, increasing the resistance of the sliding variable resistance device connected to the power supply line, slowing down the speed of the drive motor and reducing the feed speed.

[0017] The beneficial effects of the present invention are as follows: the present invention provides a CNC multi-axis mortise and tenon machine and a method of using the same, which can blow wood chips and dust in the mortise and tenon machine into an automatic dust collection device during normal mortise and tenon processing, thereby cleaning the processed mortise holes and effectively cleaning the wood chips and dust in the processing area, thereby improving the cleanliness of the working area and the environmental protection level of the equipment. When the temperature of the rotating cutter head rises, the rotating cutter head can be automatically cooled, and the feed speed can be slowed down to protect the rotating cutter head from damage, thereby improving the mortise and tenon quality, improving the mortise and tenon efficiency, and reducing the equipment failure rate. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 It is a schematic diagram of the tongue and groove head of the present invention.

[0020] Figure 3 Schematic diagram of the control device of the present invention.

[0021] Figure 4 It is a transverse cross-section of the control device of the present invention.

[0022] Figure 5 It is a longitudinal section of an air cylinder of the present invention.

[0023] Figure 6 This is a partial enlarged view of the rotary cutter head of the present invention.

[0024] Figure 7 This is a partial enlarged view of the rotary cutter head of the present invention when it is in an overheated state. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: Figure 1-Figure 7The CNC multi-axis mortise and tenon machine comprises a base, a left-right moving device 1, an up-down moving device 2, a mortise and tenon head 3, a rotating cutter head 4, a control device 5 and an automatic dust collecting device 6. The left-right moving device 1 is arranged on the base, and a driving motor is arranged on the left-right moving device 1. The driving motor rotates to drive the left-right moving device 1 to move on the base. The rotation speed of the driving motor determines the moving speed of the left-right moving device 1. The up-down moving device 2 is arranged on the left-right moving device 1, the mortise and tenon head 3 is arranged on the up-down moving device 2, and a plurality of mortise and tenon heads 3 are arranged, i.e., a multi-axis mortise and tenon machine.

[0026] The up-and-down moving device 2 controls the depth of the mortise, and the left-and-right moving device 1 controls the length of the mortise.

[0027] A hollow shaft motor 31 is provided on the mortise and tenon head 3, and one end of a rotary joint 32 is provided on the upper end of the hollow shaft on the hollow shaft motor 31, and a rotary cutter head 4 is connected to the lower end of the hollow shaft on the hollow shaft motor 31, so that the rotation of the hollow shaft motor 31 drives the rotary cutter head 4 to rotate together, thereby realizing the mortise and tenon operation of the wood, and an air inlet 41 is provided on the upper end of the rotary cutter head 4, and an air jet 42 is also opened at the cutting edge of the lower end, and the air jet 42 and the air inlet 41 are connected through a channel inside the rotary cutter head 4.

[0028] When the rotary cutter head 4 is disposed on the hollow shaft motor 31 , the air inlet 41 of the rotary cutter head 4 is connected to the lower end of the hollow shaft of the hollow shaft motor 31 , so that the rotary joint 32 can supply air to the rotary cutter head 4 when the hollow shaft motor 31 rotates.

[0029] A sliding groove 421 is provided on the air jet port 42, a switch plate 422 is slidably arranged in the sliding groove 421, and a temperature sensing cavity is provided in the rotating cutter head 4, a bimetallic strip 43 is arranged in the temperature sensing cavity, one end of the bimetallic strip 43 is fixedly arranged in the temperature sensing cavity, and the other end is connected to one end of a pull rope 44, and the other end of the pull rope 44 is connected to the rear end of the switch plate 422, and a first elastic member 441 is also sleeved on the pull rope 44, one end of the first elastic member 441 touches the upper end of the switch plate 422, and the other end touches the upper end of the sliding groove 421, and an air vent 423 is provided on the switch plate 422, and the size of the air vent 423 is 0-0.5mm, and the automatic dust collection device 6 includes an elastic telescopic cover 61, which is sleeved on the rotating cutter head 4, and a dust collection pipe 62 is connected to the upper end of the elastic telescopic cover 61, and the dust collection pipe 62 can generate negative pressure to suck out impurities in the elastic telescopic cover 61.

[0030] The rotary joint is connected to the compressed air from the outside through a pipeline. When the equipment is processing, the hollow shaft motor 31 drives the rotary cutter head 4 to rotate, thereby performing mortise and tenon operations on the wood. During processing, the lower end surface of the elastic telescopic cover 61 is pressed against the upper end surface of the wood, and the rotary cutter head 4 extends into the wood to perform mortise and tenon operations on the wood. At this time, compressed air is ejected outward through the air holes 423, so that when the rotary cutter head 4 is processing, the wood chips and dust in the processing groove are blown upward and enter the elastic telescopic cover 61, and then extracted through the dust suction pipe 62, so that there is no residual wood chips and dust in the groove, thereby ensuring a clean environment in the processing area and improving the environmental protection level of the equipment. The size of the air holes 423 is set to 0-0.5mm, so that the air outlet of the air holes 423 is small, and is only used to assist in blowing wood chips and dust upward.

[0031] The control device 5 includes an air intake pipe 51, an impeller 52, an air pump 53 and a sliding variable resistance device 54. One end of the air intake pipe 51 is connected to an external high-pressure air source, and the other end is connected to the rotary joint 32, so as to supply air to the rotating cutter head 4. The impeller 52 is rotatably arranged in the air intake pipe 51. When there is air flow in the air intake pipe 51, it can drive the impeller 52 to rotate. The rotating shaft of the air pump 53 is connected to the rotating shaft of the impeller 52, so that when the impeller 52 rotates, it can drive the air pump 53 to work. The sliding variable resistance device 54 includes an air cylinder 541, a sliding rod 542 and a resistance coil 543, all of which are arranged vertically to the ground. An air chamber 5411 is arranged at the lower end of the air cylinder 541. A first magnetic block 544 is slidably arranged in the air cylinder 541, and the first magnetic block 544 presses against the air cylinder 541. On the upper end wall of the chamber 5411, the air chamber 5411 is connected with the air cylinder 541, and an air outlet 5412 is provided at the lower end of the air chamber 5411. The side of the air chamber 5411 is connected with the air outlet of the air pump 53 through a pipeline, so that the gas generated by the air pump 53 all enters the air chamber 5411, and a variable resistance slider 545 is provided on the sliding rod 542 for guiding sliding. The variable resistance slider 545 always presses on the resistance coil 543 when sliding on the sliding rod 542, and a second magnetic block 5451 is provided on the rear end surface of the variable resistance slider 545. The second magnetic block 5451 and the first magnetic block 544 are magnetically attracted to each other via the cavity wall of the air cylinder 541, and one end of the variable resistance slider 545 and the resistance coil 543 are connected to the power supply circuit of the driving motor of the left and right moving device 1 through a wire.

[0032] In the initial state, the first magnetic block 544 presses on the air chamber 5411. At this time, the variable resistance slider 545 magnetically connected to the first magnetic block 544 is also located at the lower end of the resistance coil 543. At this time, the resistance value connected to the power supply circuit of the drive motor is the smallest. At this time, the rotating cutter head 4 starts to rotate to process the wood. The air holes 423 on the rotating cutter head 4 spray outward to blow up the wood chips and dust in the groove. At this time, a small amount of compressed gas continues to flow through the air inlet pipe 51, thereby slowly driving the impeller 52 to rotate. The impeller 52 drives the air pump 53 to rotate to generate compressed gas, which all flows out from the air outlet 5412 at the bottom of the air chamber 5411, and therefore cannot push the first magnetic block 544 to move upward.

[0033] When the types of wood being processed are different and their hardness is relatively large, when the rotary cutter head 4 processes the slot at a normal speed, the cutting cannot be completed at the normal speed. Therefore, the friction between the rotary cutter head 4 and the wood increases, and the temperature of the rotary cutter head 4 rises rapidly. Therefore, the bimetallic strip 43 in the rotary cutter head 4 is immediately deformed by the heat, and the switch plate 422 is pulled open by the pull rope 44, so that the air jet 42 is fully opened. At this time, the compressed air ejected from the air jet 42 increases sharply. First, the rotary cutter head 4 is cooled by the ejected compressed gas, so as to protect the rotary cutter head 4 from heat annealing and causing damage to the tool. At the same time, a large amount of compressed gas flows out from the air inlet pipe 51, thereby driving the impeller 52 in the air inlet pipe 51 to rotate rapidly, thereby driving the air pump 53 to inflate rapidly, and the air pump 53 quickly supplies During the gasification process, the supplied gas cannot flow out from the air outlet 5412 at the bottom of the air chamber 5411 at the first time, so the gas that cannot be discharged accumulates in the air chamber 5411, thereby increasing the air pressure in the air chamber 5411, pushing the first magnetic block 544 to slide upward, and the first magnetic block 544 drives the variable resistance slider 545 to move upward, thereby increasing the resistance connected to the drive motor circuit, slowing down the speed of the drive motor, thereby slowing down the lateral movement speed, and causing the rotary cutter head 4 to feed slowly, which can perform normal mortise and tenoning on hard wood. When the slot hole is short, the rotary cutter head 4 is not completely cooled, and the slot hole can be processed at a slow speed, thereby avoiding the roughness of the slot hole, severe wear of the tool, and even breaking of the cutter head caused by excessive feeding.

[0034] When the length of the processed slot is longer, during the slow feeding process, the dry friction of the rotating cutter head 4 is reduced, and at the same time, the temperature is gradually reduced under the heat dissipation of compressed air, so that the deformation of the bimetallic strip 43 is slowed down, and the opening degree of the jet port 42 is reduced, thereby reducing the amount of gas ejected, thereby reducing the air supply of the air pump 53, and the first magnetic block 544 slowly descends, so that the speed of the drive motor slowly increases, and the feed speed is increased. After several reciprocating heating and cooling, the rotating cutter head 4 maintains a stable temperature range, so that the feed speed and the cutting speed reach a dynamic balance, thereby achieving the effect of automatic material hardness and automatic speed matching.

[0035] Its working principle or usage is as follows:

[0036] When the equipment is processing, the hollow shaft motor 31 drives the rotating cutter head 4 to rotate, thereby performing mortising operations on the wood. During processing, the lower end surface of the elastic telescopic cover 61 presses against the upper end surface of the wood, and the rotating cutter head 4 extends into the wood to perform mortising operations on the wood. At this time, compressed air is ejected outward from the air holes 423, so that when the rotating cutter head 4 is processing, the wood chips and dust in the processing groove are blown upward and enter the elastic telescopic cover 61, and then extracted through the dust suction pipe 62, so that there is no residual wood chips and dust in the groove, ensuring a clean environment in the processing area.

[0037] When the hardness of the processed wood is relatively high, the processing procedure has not changed. Therefore, when the rotary cutter head 4 processes the slot at a normal speed, the cutting cannot be completed at the normal speed. Therefore, the friction between the rotary cutter head 4 and the wood increases, and the temperature of the rotary cutter head 4 rises rapidly. Therefore, the bimetallic strip 43 in the rotary cutter head 4 is immediately deformed by the heat, and the switch plate 422 is pulled open by the pull rope 44, so that the air jet 42 is fully opened. At this time, the compressed air ejected from the air jet 42 increases sharply. First, the rotary cutter head 4 is cooled by the ejected compressed gas, so as to protect the rotary cutter head 4 from heat annealing and causing damage to the tool. At the same time, a large amount of compressed gas flows out through the air inlet pipe 51, thereby driving the impeller in the air inlet pipe 51. 52 rotates rapidly, thereby driving the air pump 53 to quickly inflate, and in the process of the air pump 53 quickly supplying air, the supplied gas cannot flow out from the air outlet 5412 at the bottom of the air chamber 5411 in the first time, so the gas that cannot be discharged accumulates in the air chamber 5411, thereby increasing the air pressure in the air chamber 5411, pushing the first magnetic block 544 to slide upward, and the first magnetic block 544 drives the variable resistance slider 545 to move upward, thereby increasing the resistance connected to the drive motor circuit, slowing down the speed of the drive motor, and thus slowing down the lateral movement speed, so that the rotating cutter head 4 can perform normal mortise and tenoning on the hard wood, thereby avoiding the roughness of the groove hole, severe wear of the tool, and even breaking of the cutter head.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A CNC multi-axis mortise and tenon machine, comprising a base, a left-right moving device (1), an up-down moving device (2) and a mortise and tenon head (3), wherein the mortise and tenon head (3) is arranged on the up-down moving device (2), the up-down moving device (2) is arranged on the left-right moving device (1), and the right moving device (1) is arranged on the base, so that the mortise and tenon head (3) can move up-down, left-right and right-right to process wood. Features: A rotating cutter head (4) and a control device (5) are provided on the mortise and tenon head (3). The mortise and tenon head (3) comprises a hollow shaft motor (31). A rotating joint (32) is provided at the upper end of the hollow shaft motor (31). The lower end is connected to the rotating cutter head (4). An air inlet (41) is provided at the upper end of the rotating cutter head (4). An air jet (42) is provided at the cutting edge of the lower end. The air jet (42) is connected to the air inlet (41) at the upper end through an internal channel. After the rotating cutter head (4) is mounted on the mortise and tenon head (3), the lower end of the hollow shaft of the hollow shaft motor (31) is connected to the air inlet (41). The control device (5) comprises an air intake pipe (51), an impeller (52) and a sliding variable resistance device (54); one end of the air intake pipe (51) is connected to an external high-pressure air source, and the other end is connected to a rotary joint (32) so as to supply air to the rotary cutter head (4); the impeller (52) is rotatably arranged on the air intake pipe (51); when air flows in the air intake pipe (51), the impeller (52) can be driven to rotate; the sliding variable resistance device (54) is connected to a power supply circuit of a drive motor of the left-right moving device (1); the sliding variable resistance device (54) can automatically adjust a resistance value according to a rotation speed of the impeller (52), so as to change a rotation speed of the drive motor; The air jet (42) is provided with a sliding groove (421), a switch plate (422) is elastically slidably arranged in the sliding groove (421), and a temperature sensing cavity is provided in the rotating cutter head (4), a bimetallic strip (43) is arranged in the temperature sensing cavity, one end of the bimetallic strip (43) is fixedly arranged in the temperature sensing cavity, and the other end is connected to one end of a pull rope (44), and the other end of the pull rope (44) is connected to the rear end of the switch plate (422). When the temperature of the rotating cutter head (4) rises, the bimetallic strip (43) is deformed and bent, thereby pulling the switch plate (422) to open, and compressed gas is ejected from the air jet (42), and the rotating cutter head (4) is cooled by the compressed air; At the same time, the outflow of compressed gas drives the impeller (52) in the air inlet pipe (51) to rotate, thereby increasing the resistance of the sliding variable resistance device (54) connected to the power supply line, thereby slowing down the rotation speed of the drive motor.

2. The CNC multi-axis mortise and tenon machine according to claim 1, Features: The control device (5) further comprises an air pump (53), the rotating shaft of the air pump (53) is connected to the impeller (52), the sliding variable resistance device (54) comprises an air cylinder (541), a sliding rod (542) and a resistance coil (543), all of which are arranged vertically to the ground, a first magnetic block (544) is slidably arranged in the air cylinder (541), an air chamber (5411) is arranged at the lower end of the air cylinder (541), and the first magnetic block (544) is pressed against the air cylinder (541). An air outlet hole (5412) is provided at the upper end of the air chamber (5411) and the lower end of the air chamber (5411). The side of the air chamber (5411) is connected to the air outlet of the air pump (53) through a pipeline, so that all the gas generated by the air pump (53) enters the air chamber (5411). A variable resistance slider (545) is provided on the sliding rod (542) to guide the sliding movement. The variable resistance slider (545) always presses against the resistance coil when sliding on the sliding rod (542). (543), and a second magnetic block (5451) is arranged on the rear end surface of the variable resistance slider (545), the second magnetic block (5451) and the first magnetic block (544) are magnetically attracted to each other via the cavity wall of the air cylinder (541), and one end of the variable resistance slider (545) and the resistance coil (543) are connected to the motor power supply line of the left-right moving device (1) through a wire, the impeller (52) rotates, driving the air pump (53) to work, and when the air pump (53) rotates initially, compressed air is generated and can flow out from the air outlet (5412), and when the speed of the air pump (53) is accelerated, the compressed gas generated by it cannot flow out from the air outlet (5412) at the first time, and the compressed gas pushes the first magnetic block (544) to slide upward, thereby driving the variable resistance slider (545) to slide upward together, connecting more resistors to the power supply line of the drive motor, thereby reducing the speed of the drive motor.

3. The CNC multi-axis mortise and tenon machine according to claim 1, Features: The invention also comprises an automatic dust collection device (6), the automatic dust collection device (6) comprising an elastic telescopic cover (61), the elastic telescopic cover (61) being sleeved on the rotating cutter head (4), and a dust collection pipe (62) being connected to the upper end of the elastic telescopic cover (61), the dust collection pipe (62) being able to generate negative pressure to suck out impurities in the elastic telescopic cover (61).

4. The CNC multi-axis mortise and tenon machine according to claim 3, Features: The switch plate (422) is provided with an air hole (423). When the rotating cutter head (4) processes the wood, the lower end of the elastic telescopic cover (61) elastically presses against the surface of the wood. At this time, the rotating cutter head (4) ejects compressed air outward through the air hole (423), causing wood chips and dust generated during processing to fly upward into the elastic telescopic cover (61), thereby assisting the automatic dust collection device (6) in collecting dust.

5. A method of using the CNC multi-axis mortise and tenon machine as claimed in claim 4, Features: S1: The wood is placed on the base and clamped, the device is turned on, the rotary cutter head (4) starts to rotate, the up-and-down moving device (2) drives the mortise and tenon head (3) to descend, and the left-and-right moving device (1) drives the mortise and tenon head (3) to move horizontally; S2: The air holes (423) on the rotating cutter head (4) blow air outwards, blowing wood chips and dust into the elastic telescopic cover (61), and then extracting them through the dust suction pipe (62); S3: When the temperature of the rotating cutter head (4) rises, the switch plate (422) automatically opens, and compressed air flows out from the air jet (42), thereby cooling the rotating cutter head (4); S4: Compressed air flows out from the air jet port (42), thereby driving the impeller (52) to rotate, increasing the resistance of the sliding variable resistance device (54) connected to the power supply line, slowing down the rotation speed of the driving motor and reducing the feeding speed.

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