Plate T-shaped groove grooving process

Abstract

The invention relates to the technical field of plate processing, and discloses a plate T-shaped groove slotting process which comprises the following steps: (1) clamping a plate on processing equipment, and setting a tool; (2) equipment is started, constant-speed feeding is conducted, and a first feed amount is fed from the side face of the plate in the positive direction of the X axis; (3) feeding is conducted by the second feed amount in the forward direction of the Y axis, and then feeding is conducted in the reverse direction of the X axis till the tool bit leaves the plate; (4) the position of the tool bit is adjusted in the forward direction of the Y axis, and then the tool bit is fed again by the first feed amount in the forward direction of the X axis; and (5) feeding is conducted by the third feed amount in the Y-axis reverse direction, and then feeding is conducted in the X-axis reverse direction till the tool bit leaves the plate. The horizontal part and the vertical part of the T-shaped groove can be machined at the same time, plates which are high in surface quality and free of defects can be machined by controlling the rotating speed and the feeding speed of the main shaft with the minimum number of times of feeding, and the tool bit can be better protected.

Description

Technical Field

[0001] The present invention relates to the technical field of sheet processing, and particularly relates to a process for grooving a T-shaped groove on a sheet. Background Art

[0002] With the improvement of living standards, people have higher and higher requirements for furniture and building materials, not only to meet the use functions, but also to be beautiful and durable.

[0003] The side-hung door is a common way to open a door, also called a single-leaf door. The door leaf is connected to the door frame or the cabinet body through a hinge and can be opened inward or outward. This method usually requires enough space to ensure the full opening of the door, so the surrounding environment and usage requirements need to be considered during design and installation.

[0004] In recent years, people have higher and higher requirements for side-hung cabinet doors. Therefore, most side-hung cabinet doors will make the handle in an inlaid style, making the surface of the cabinet door smoother and neater, without destroying the visual effect, giving people a simple and modern feeling. Compared with the protruding handle, the inlaid handle can avoid the risk of accidental injury or being stuck, especially suitable for families with children or the elderly.

[0005] CN216008269U discloses a cabinet door with an inlaid handle, including a door panel, a handle inlaid on the door panel, and a fixing component for fixing the door panel and the handle. A receiving groove for accommodating the handle is opened on the door panel. A positioning block is arranged on the outer side of the handle, and a clamping groove corresponding to the positioning block is arranged on the door panel. The clamping groove is opened on the side wall of the receiving groove. The fixing component includes a magnetic attracting member and a magnetic member. The magnetic attracting member is fixed on the door panel, and the magnetic member is fixed on the handle. The magnetic attracting member and the magnetic member attract each other magnetically.

[0006] The above technical solution embeds the handle in the door panel, avoiding the outward protrusion of the handle, improving safety while taking into account aesthetics and practicality. However, the above technology does not disclose the processing method of the handle receiving groove. For the processing of the receiving groove, not only a suitable tool bit needs to be used to perform processing with as few feed operations as possible, but also the control of parameters is extremely important. Summary of the Invention

[0007] The purpose of the present invention is to provide a process for grooving a T-shaped groove on a sheet. This process uses a tool body with a first side cutting edge and a U-shaped cutting edge, which can simultaneously process the horizontal part and the vertical part of the T-shaped groove. With the least number of feed operations, by controlling the spindle speed and the feed rate, not only can a sheet with high surface quality and no defects be processed, but also the tool bit can be better protected, and the tool bit has a higher service life.

[0008] To achieve the above purpose, the present invention provides the following technical solutions:

[0009] A grooving process for T-shaped grooves on a plate. The process involves a tool bit. The tool bit includes a fixing rod, and at least two tool bodies that are centrosymmetrically arranged around the fixing rod on the fixing rod.

[0010] The tool bodies are successively provided with a first side cutting edge and a U-shaped cutting edge along the axial direction of the fixing rod. The machining trajectory circle of the first side cutting edge is smaller than that of the U-shaped cutting edge, and the first side cutting edge is connected to the top of the U-shaped cutting edge.

[0011] The process includes the following steps:

[0012] Step (1): Clamp the plate on the processing equipment, perform tool setting, so that the upper surface of the plate is between the highest point and the lowest point of the first side cutting edge, and the U-shaped cutting edge is between the upper surface and the lower surface of the plate.

[0013] Step (2): Start the equipment. The tool bit rotates at a speed of 20000r / min to 22000r / min and feeds uniformly at a feed rate of 30 to 40mm / s, and feeds the first feed amount along the positive X-axis direction from the side of the plate.

[0014] Step (3): Feed the second feed amount along the positive Y-axis direction, and then feed along the negative X-axis direction until the tool bit leaves the plate.

[0015] If the current dimension meets the preset dimension, the machining is completed; if not, go to step (4).

[0016] Step (4): Adjust the position of the tool bit along the positive Y-axis direction, and then feed the first feed amount again along the positive X-axis direction.

[0017] Step (5): Feed the third feed amount along the negative Y-axis direction, and then feed along the negative X-axis direction until the tool bit leaves the plate.

[0018] In step (2), the rotational speed of the tool bit can be 20000r / min, 20500r / min, 21000r / min, 21500r / min, 22000r / min, but is not limited to the listed values, and other unlisted values within this numerical range are applicable. And the feed rate can be 30mm / s, 31mm / s, 32mm / s, 33mm / s, 34mm / s, 35mm / s, 36mm / s, 37mm / s, 38mm / s, 39mm / s, 40mm / s, but is not limited to the listed values, and other unlisted values within this numerical range are applicable.

[0019] Preferably, the board is a particle board or a European pine board. Both particle board and European pine board are boards made of wood particles or sawdust through processing, compression, bonding and other processes. The density of particle board and European pine board is relatively low, and burrs and flash are very likely to occur during processing, so the rotation speed and feed speed need to be controlled.

[0020] Preferably, in step (2) and step (4), the first feed amount is the length of the T-slot, and the first feed amount is smaller than the width of the plate.

[0021] Preferably, in step (3), the second feed amount is the width of the T-slot, and the second feed amount is smaller than the first feed amount.

[0022] Preferably, in step (4), the position of the tool head is adjusted to feed the tool head again along the positive direction of the Y-axis by a second feed amount.

[0023] Preferably, in step (5), the third feed amount is the same as the second feed amount.

[0024] Preferably, in step (3) and step (5), the feeding path along the reverse direction of the X-axis is the same.

[0025] Preferably, the cutter head cuts in a manner such that the axis thereof is perpendicular to the plate.

[0026] Preferably, it also includes an arc-shaped blade, which includes a second side blade, an upper blade, and a bottom blade, and the first side blade is connected to the upper blade through the arc-shaped blade; the upper blade is connected to the upper end of the second side blade, and the bottom blade is located at the bottom of the blade body and connected to the lower end of the second side blade, and the processing trajectory circle of the first side blade is smaller than the processing trajectory circle of the second side blade.

[0027] Preferably, the blade angle of the first side blade is 50-60°; the blade angle of the second side blade is 50-60°; the blade angle of the upper blade is 85-88°; and the blade angle of the bottom blade is 85-88°. The blade angle of the first side blade can be 50°, 51°, 52°, 53°, 54°, 55°, 56°, 57°, 58°, 59°, 60°; the blade angle of the second side blade can be 50°, 51°, 52°, 53°, 54°, 55°, 56°, 57°, 58°, 59°, 60°; the blade angle of the upper blade can be 85°, 86°, 87°, 88°; and the blade angle of the bottom blade can be 85°, 86°, 87°, 88°. The above blade angles are not limited to the listed values, and other values ​​not listed within this numerical range are applicable.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] By adopting a cutter body with a first side cutting edge and a C-shaped cutting edge, the present invention can simultaneously machine the horizontal part and the vertical part of the T-shaped groove. With the least number of feed operations, by controlling the spindle speed and the feed rate, it can not only machine a plate with high surface quality and no defects, but also better protect the cutter head, and the cutter head has a higher service life. Description of the Drawings

[0030] Figure 1 is a perspective view of the cutter head of Example 1;

[0031] Figure 2 is a front view of the cutter head of Example 1;

[0032] Figure 3 is a top view of the cutter head of Example 1;

[0033] Figure 4 is Figure 2 the A-A sectional view of

[0034] Figure 5 is Figure 2 the B-B sectional view of

[0035] Figure 6 is a machining schematic diagram of the present invention;

[0036] Figure 7 is a notch schematic diagram of the cutter head cutting edge of the present invention;

[0037] Figure 8 is a defect-free diagram of the particle board of the present invention;

[0038] Fig. 9 is one of the defect diagrams of the particle board of the present invention;

[0039] Fig.10 is another defect diagram of the particle board of the present invention;

[0040] Fig.11 is a third defect diagram of the particle board of the present invention;

[0041] Fig.12 is a defect-free diagram of the OSB board of the present invention;

[0042] Fig.13 is one of the defect diagrams of the solid wood board of the present invention;

[0043] Fig.14 is another defect diagram of the solid wood board of the present invention;

[0044] Fig.15 is one of the defect diagrams of the multi-layer board of the present invention;

[0045] Fig.16 is another defect diagram of the multi-layer board of the present invention. Specific embodiments

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0047] In the following embodiments and comparative examples, except for Embodiment 1, the test method for the tool bit in the T-slot grooving is to process for 8 hours every day, with 720 hours in 3 months as the limit. The test results can be referred to Figure 7 ; The T-slot grooving results are recorded 6 times, that is, the plate is recorded once every 120 hours, and the maximum chipping on the plate is recorded. The test results can be referred to Figures 8 to 16 . It should be noted here that the two tests are carried out simultaneously, that is, when processing with the corresponding embodiments and comparative examples, the situation of the tool bit in the T-slot grooving and the T-slot grooving results are recorded simultaneously.

[0048] Embodiment 1

[0049] Referring to Figures 1 to 5 , a tool bit includes a fixing rod 1, and at least two tool bodies 11 that are centrosymmetric around the fixing rod 1 are provided on the fixing rod 1;

[0050] The tool body 11 is sequentially provided with a first side cutting edge 111 and a U-shaped cutting edge 112 along the axis direction of the fixing rod 1. The processing trajectory circle of the first side cutting edge 111 is smaller than that of the U-shaped cutting edge 112, and the first side cutting edge 111 is connected to the top of the U-shaped cutting edge 112.

[0051] When the tool bit rotates, the present tool bit can cut the vertical part of the T-slot through the first side cutting edge 111, and can cut the horizontal part of the T-slot through the U-shaped cutting edge 112, and can cut the vertical part and the horizontal part of the T-slot simultaneously in one feed.

[0052] Preferably, it further includes an arc-shaped cutting edge 113. The U-shaped cutting edge 112 includes a second side cutting edge 1121, an upper cutting edge 1122, and a bottom cutting edge 1123. The first side cutting edge 111 is connected to the upper cutting edge 1122 through the arc-shaped cutting edge 113; the upper cutting edge 1122 is connected to the upper end of the second side cutting edge 1121, the bottom cutting edge 1123 is located at the bottom of the tool body 11 and is connected to the lower end of the second side cutting edge 1121, and the processing trajectory circle of the first side cutting edge 111 is smaller than that of the second side cutting edge 1121.

[0053] Specifically, the arc-shaped blade 113 can directly process the connection between the horizontal and vertical parts of the T-slot into a rounded corner, which is safer and easier to install other components that match the T-slot in the T-slot. Because the connection between the horizontal part and the connecting part in the handle component is usually a right angle, the rounded corner does not need to be precisely aligned and can be installed at the right-angle connection.

[0054] Preferably, the blade angle a of the first side blade 111 is 50-60°; the blade angle b of the second side blade 1121 is 50-60°; the blade angle c of the upper blade 1122 is 85-88°; and the blade angle d of the bottom blade 1123 is 85-88°.

[0055] The blade angle a of the first side blade 111 is preferably 55-60°, and more preferably, the blade angle a of the first side blade 111 is 60°; the blade angle b of the second side blade 1121 is preferably 55-60°, and more preferably, the blade angle b of the second side blade 1121 is 60°; the blade angle c of the upper blade 1122 is preferably 86-88°, and more preferably, the blade angle c of the upper blade 1122 is 87°; the blade angle d of the bottom blade 1123 is preferably 86-88°, and more preferably, the blade angle d of the bottom blade 1123 is 87°.

[0056] More specifically, regarding the first side blade 111 and the second side blade 1121, since both are side cutting, if the blade angle is too small, the tool will be easily worn, and the cutting force will be concentrated on the blade, which will easily cause tool damage and reduce the quality of the machined surface. If the blade angle is too small, the friction resistance of the tool will increase, the cutting heat will increase, and the cutting stability and machining efficiency will be affected; on the contrary, if the blade angle is too large, the rigidity and stability of the tool will be reduced, causing chip brittleness and difficulty in chip discharge, affecting the quality of the machined surface. If the blade angle is too large, the cutting force of the tool will increase, the accumulation of cutting heat will be aggravated, and the tool life will be reduced.

[0057] As for the upper blade 1122 and the bottom blade 1123, the reason why it is best to be close to 90 degrees is mainly to ensure good cutting performance and effective discharge of chips, a more uniform distribution of cutting load, and a more stable force on the blade body 11.

[0058] Example 2

[0059] refer to Figure 6 , a process for cutting a T-slot on a plate, the process using the cutter head of Example 1;

[0060] Among them, the diameter of the machining trajectory circle of the first side blade is: 14mm; the diameter of the machining trajectory element of the second measuring blade is: 25mm; the edge angle of the first side blade is 60°; the edge angle of the second side blade is 60°; the edge angle of the upper blade is 87°; the edge angle of the bottom blade is 87°;

[0061] The sheet material used is particle board; the dimensions of the grooving are as follows: the length of the horizontal part of the T-shaped groove is 128 mm and the width is 40 mm, and the length of the vertical part of the T-shaped groove is 118 mm and the width is 28 mm.

[0062] The process includes the following steps:

[0063] Step (1): Clamp the sheet material on the processing equipment, perform tool setting so that the upper surface of the sheet material is between the highest point and the lowest point of the first side cutting edge, and the U-shaped cutting edge is between the upper surface and the lower surface of the sheet material;

[0064] Step (2): Start the equipment, the tool head rotates at a speed of 22000 r / min and feeds at a constant feed speed of 30 mm / s, and feeds the first feed amount from the side of the sheet material along the positive X-axis direction;

[0065] Step (3): Feed the second feed amount along the positive Y-axis direction, and then feed along the negative X-axis direction until the tool head leaves the sheet material;

[0066] Step (4): Feed the second feed amount again along the positive Y-axis direction, adjust the position of the tool head, and then feed the first feed amount again along the positive X-axis direction;

[0067] Step (5): Feed the third feed amount along the negative Y-axis direction, and then feed along the negative X-axis direction until the tool head leaves the sheet material.

[0068] Example 3

[0069] It is basically the same as Example 2, the difference is that in Step (2), the rotation speed of the tool head is 22000 r / min; the feed speed is 40 mm / s.

[0070] Example 4

[0071] It is basically the same as Example 2, the difference is that in Step (2), the rotation speed of the tool head is 20000 r / min; the feed speed is 30 mm / s.

[0072] Example 5

[0073] It is basically the same as Example 2, the difference is that in Step (2), the rotation speed of the tool head is 20000 r / min; the feed speed is 40 mm / s.

[0074] Example 6

[0075] It is basically the same as Example 2, the difference is that in Step (2), the rotation speed of the tool head is 21000 r / min; the feed speed is 35 mm / s.

[0076] Comparative Example 1

[0077] It is basically the same as Example 2, except that in step (2), the rotation speed of the cutter head is 18000 r / min.

[0078] Comparative Example 2

[0079] It is basically the same as Example 2, except that in step (2), the rotation speed of the cutter head is 24000 r / min.

[0080] Comparative Example 3

[0081] It is basically the same as Example 2, except that in step (2), the feed speed is 25 mm / s.

[0082] Comparative Example 4

[0083] It is basically the same as Example 2, except that in step (2), the feed speed is 45 mm / s.

[0084] Comparative Example 5

[0085] It is basically the same as Example 2, except that the board material used is European pine board.

[0086] Comparative Example 6

[0087] It is basically the same as Example 2, except that the board used is a solid wood board.

[0088] Comparative Example 7

[0089] It is basically the same as Example 2, except that the board material used is a multi-layer board.

[0090] The T-slotting process was carried out using Examples 2 to 6 and Comparative Examples 1 to 7, respectively. The conditions of the cutter heads are shown in Table 1, and the slotting results are recorded in Table 2.

[0091] Table 1 T-slot cutting head

[0092]

[0093] Table 2 T-slotting result record

[0094]

[0095]

[0096]

[0097] It should be noted that the slotting results in Table 2 correspond to the embodiments and comparative examples in Table 1 one by one, rather than being tested separately. The test method is to process for 8 hours a day, with 3 months, i.e. 720 hours, as the limit. In Table 1, the ones marked with " / " indicate that the working time can reach or even exceed 720 hours. If the working time cannot reach 720 hours, the problems that occur at the corresponding hours and the condition of the cutter head are recorded. If a notch is found on the blade, the processing is stopped.

[0098] In Table 2, the test method adopts a 6-time recording method, that is, the plate is recorded once every 120 hours, and the maximum edge chipping on the plate is recorded, corresponding to Table 1. The area marked with " / " indicates that the processing and recording have been stopped.

[0099] Result analysis:

[0100] 1. From the results of Example 2 and Example 3, it can be seen that the difference between Example 2 and Example 3 is that the feed speed of Example 2 is 30 mm / s, while the feed speed of Example 3 is 40 mm / s. From the results of Table 1 and Table 2, it can be seen that at a spindle speed of 22000 r / min, the feed speed of 30 mm / s and the feed speed of 40 mm / s can both meet the processing of 720 hours or more. For details, please refer to the attached Figure 8 , and from the attached Figure 8 It can be seen that the surface quality of the board is high and has no defects, which means that both Example 2 and Example 3 can meet the processing requirements of particle board.

[0101] 2. From the results of Example 4 and Example 5, it can be seen that the difference between Example 4 and Example 5 is that the feed speed of Example 4 is 30 mm / s, while the feed speed of Example 5 is 40 mm / s. From the results of Table 1 and Table 2, it can be seen that at a spindle speed of 20000 r / min, the feed speed of 30 mm / s and the feed speed of 40 mm / s can both meet the processing of 720 hours or more. The results are as follows Figure 8 , and from the attached Figure 8 It can be seen that the surface quality of the board is high and has no defects, which means that both Example 4 and Example 5 can meet the processing requirements of particle board.

[0102] 3. From the results of Example 2, Example 4, and Example 6, it can be seen that the spindle speed of Example 6 adopts the intermediate value of Example 2 and Example 4, and the feed speed of Example 6 adopts the intermediate value of Example 2 and Example 4. Moreover, from the results of Table 1 and Table 2, it can be seen that Example 6 can also meet the processing requirements of 720 hours or even more. The results are similar to those in the attached table. Figure 8The results show that the surface quality of the plate is high and there are no defects, which further shows that the spindle speed in the range of 20000-22000r / min and the feed speed in the range of 30-40mm / s can meet the processing requirements of particle board.

[0103] 4. From the results of Example 2, Example 4 and Comparative Example 1, it can be seen that Comparative Example 1 uses a smaller spindle speed than Example 2 and Example 4, with a difference of 4000 r / min from Example 2 and 2000 r / min from Example 4. However, in the second recording, that is, when it does not exceed 240 hours, the edge collapse of Comparative Example 1 occurs, and the maximum edge collapse is 0.11 mm. The results are as follows: Fig. 9 , compared with the attached Figure 8 , it can be seen that Fig. 9 There is a slight chipping on the plate in the third record. There is still chipping in the third record, but it does not exceed 0.11mm. Therefore, the maximum chipping in the third record is still 0.11mm. This is because the spindle speed is too low and the cutting force of the cutter head is not enough. It can be known that the cutter head has been worn out before it has worked for more than 240 hours. The cutting resistance increases, resulting in increased vibration of the cutter head on the surface of the plate and chipping. In the fourth record, the chipping still exists, and the maximum chipping has exceeded 0.11mm, up to 0.32mm. The result is attached. Fig.10 , and see the attached Fig.10 The collapse edge should be compared Fig. 9 It is more obvious, indicating that the wear of the blade has increased, resulting in a gap on the blade at 402 hours. Figure 7 , the processing stops, that is, the record stops at the fourth time and does not continue to record.

[0104] 5. From the results of Example 2, Example 4 and Comparative Example 2, it can be seen that Comparative Example 2 uses a higher spindle speed than Example 2 and Example 4. As can be seen from Table 1, the higher spindle speed caused edge collapse in the first recording, that is, within 120 hours, with a maximum of 0.15 mm. The results are similar to those in the attached table. Fig. 9 This is because when the speed is too high, the cutting force on the tool increases, the tool is prone to overheating and wear. In the subsequent second and third records, edge chipping was found, but it did not exceed 0.15mm. In the fourth record, the maximum edge chipping exceeded 0.15mm, even reaching three times the first record, reaching 0.46mm. The results are similar to the attached Fig.11 Similar to Fig.10 , attached Fig.11 The edge collapse is more obvious. Although too high a speed can improve the processing accuracy, it will aggravate the wear of the tool. Therefore, a gap appears on the blade at 395 hours. Figure 7, shorter lifespan.

[0105] We also noticed that when the spindle speed exceeded the range of 20,000 to 22,000 r / min, whether it was lower or higher than this range, edge collapse was recorded during processing, and the life of the cutter head was also reduced. Therefore, it can be concluded that the optimal spindle speed should be between 20,000 and 22,000 r / min.

[0106] 6. From the results of Example 2, Example 3, Comparative Example 3 and Comparative Example 4, it can be seen that Comparative Example 3 uses a smaller feed rate than Example 2. However, from the results of Table 1 and Table 2, it can be seen that a smaller feed rate can also meet the processing time of 720 hours or more, and the surface quality of the plate is high and defect-free. The results are consistent with those of the attached drawings. Figure 8 Similar, but it can be known that a smaller feed speed indicates that the tool head moves slower, exchanging efficiency for higher processing accuracy. Obviously, under the premise that Example 2 can already meet the processing requirements, there is no need to choose a slower speed.

[0107] Comparative Example 4 uses a larger feed speed than Example 3. As can be seen from Table 2, edge chipping was found in the first recording, and the maximum edge chipping reached 0.21 mm. The results are consistent with the attached Fig.10 Similarly, in the second recording, there was already a chipping of more than 0.21mm, and the maximum chipping was updated to 0.29mm. Because it was not much different from the first time, the result is the same as the attached Fig.10 Similarly, no larger chipping occurred in the third record, while in the fourth record, the maximum chipping was as high as 0.48 mm. Fig.11 Similarly, it means that the cutter head was worn within 120 hours, the wear increased within 240 hours, serious wear occurred within 480 hours, and a chip appeared on the blade at 423 hours. This is because the cutter head moves faster. When the feed speed is too fast, the cutting force generated during the cutting process will also increase, increasing the friction and heat during cutting, causing the temperature in the cutting area to rise, and the cutter head is more susceptible to wear and breakage.

[0108] We also noticed that when the feed speed exceeds the range of 30-40 mm / s, the processing is satisfactory below this range, but the efficiency is too low. Above this range, serious edge collapse was recorded during processing, and the life of the cutter head was also reduced. Therefore, it can be concluded that the best feed speed for processing particle board should be between 30 and 40 mm / s.

[0109] 7. From the results of Example 1 and Comparative Example 5, it can be seen that the European pine board used in Comparative Example 5 is a man-made board made of wood chips compared to particle board. Both are formed by adding adhesive to wood chips and then pressing them under high temperature and high pressure. Moreover, we found that the European pine board can not only meet the 720-hour processing after using the same parameters as the particle board, but also no defects were found in the six records. The results are as follows: Fig.12 , indicating that this parameter can also meet the processing requirements of European particleboard.

[0110] 8. From the results of Example 1, Comparative Example 6 and Comparative Example 7, it can be seen that Comparative Example 6 and Comparative Example 7 use different boards. Comparative Example 6 uses a solid wood board, which is made of natural wood without adding other materials, and has higher density and higher hardness; Comparative Example 7 uses a multi-layer board, which is made of multiple layers of thin wood slices cross-stacked, and the texture direction of each layer of wood slices is staggered. The density and hardness are higher than particle board and European pine board, but slightly worse than solid wood board. From the results of Table 1 and Table 2, it can be seen that the parameters for processing particle board are not suitable for solid wood board and multi-layer board, especially solid wood board. In the second recording, a 0.14mm chipping edge appeared, and the result was Fig.13 ; The third record exceeded 0.14mm, and the chipping edge reached 0.33mm. The result is Fig.14 ,from Fig.14 It can be seen that the edge has been chipped on both sides of the notch. Comparative Example 6 had a notch on the blade at 332 hours, so there were only three records. Although Comparative Example 7 had four records, a slight chip of 0.12mm appeared in the second record, and the result was Fig.15 ; In the third recording, a larger chipping occurred, reaching 0.31mm. The result was Fig.16 ,from Fig.16 It can be seen that the edge collapse is more obvious than Fig.15 Although there was no larger edge collapse in the fourth time, a chip appeared on the blade at 393 hours, so there are only four records.

[0111] In summary, by adopting a tool body with a first side cutting edge and a U-shaped cutting edge, the present invention can simultaneously machine the horizontal part and the vertical part of the T-shaped groove. With the least number of feed operations, through the analysis of experimental results, the optimal spindle speed is between 20,000 and 22,000 r / min, and the optimal feed rate is between 30 and 40 mm / s. By controlling the spindle speed and the feed rate within this range, not only can a high-surface-quality and defect-free plate be machined, but also the tool tip can be better protected, with a higher tool tip lifespan, enabling the tool tip to work for 720 hours or more without the need for frequent replacement. Moreover, through experiments with different plates, it is further proved that the spindle speed in the range of 20,000 - 22,000 r / min and the feed rate in the range of 30 - 40 mm / s are particularly suitable for artificial plates such as particleboard and oriented strand board.

[0112] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A process for cutting T-slots in a plate, characterized in that: The process involves a tool bit, which includes a fixing rod, and at least two tool bodies that are centrosymmetric around the fixing rod are provided on the fixing rod; The tool bodies are sequentially provided with a first side cutting edge and a U-shaped cutting edge along the axial direction of the fixing rod. The machining trajectory circle of the first side cutting edge is smaller than that of the U-shaped cutting edge, and the first side cutting edge is connected to the top of the U-shaped cutting edge; The process includes the following steps: Step (1): Clamp the sheet on the processing equipment, perform tool setting, so that the upper surface of the sheet is between the highest point and the lowest point of the first side cutting edge, and the U-shaped cutting edge is between the upper surface and the lower surface of the sheet; Step (2): Start the equipment, the tool bit rotates at a speed of 20000r / min - 22000r / min, and feeds uniformly at a feed rate of 30 - 40mm / s, and feeds a first feed amount along the positive X-axis direction from the side of the sheet; Step (3): Feed a second feed amount along the positive Y-axis direction, and then feed along the negative X-axis direction until the tool bit leaves the sheet; If the current size meets the preset size, the machining ends; if not, go to step (4); Step (4): Adjust the position of the tool bit along the positive Y-axis direction, and then feed the first feed amount again along the positive X-axis direction; Step (5): Feed a third feed amount along the negative Y-axis direction, and then feed along the negative X-axis direction until the tool bit leaves the sheet.

2. The plate T-slotting process according to claim 1, characterized in that: The sheet is a particle board or an oriented strand board.

3. The plate T-slotting process according to claim 1, characterized in that: In step (2) and step (4), the first feed amount is the length of the T-shaped groove, and the first feed amount is smaller than the width of the sheet.

4. The plate T-slotting process according to claim 1, characterized in that: In step (3), the second feed amount is the width of the T-shaped groove, and the second feed amount is smaller than the first feed amount.

5. The plate T-slotting process according to claim 1, characterized in that: In step (4), adjusting the position of the tool bit is to feed the second feed amount again along the positive Y-axis direction.

6. The plate T-slotting process according to claim 1, characterized in that: In step (5), the third feed amount is the same as the second feed amount.

7. The plate T-slotting process according to claim 1, characterized in that: In step 3 and step (5), the feeding paths along the negative X-axis direction are the same.

8. The plate T-slotting process according to claim 1, characterized in that: The tool bit feeds with its axis perpendicular to the sheet.

9. The plate T-slotting process according to claim 1, characterized in that: It also includes an arc-shaped cutting edge. The U-shaped cutting edge includes a second side cutting edge, an upper cutting edge, and a bottom cutting edge. The first side cutting edge is connected to the upper cutting edge through the arc-shaped cutting edge; the upper cutting edge is connected to the upper end of the second side cutting edge, the bottom cutting edge is located at the bottom of the tool body and is connected to the lower end of the second side cutting edge. The machining trajectory circle of the first side cutting edge is smaller than that of the second side cutting edge.

10. The plate T-slotting process according to claim 9, characterized in that: The edge angle of the first side cutting edge is 50 - 60°; the edge angle of the second side cutting edge is 50 - 60°; the edge angle of the upper cutting edge is 85 - 88°; the edge angle of the bottom cutting edge is 85 - 88°.

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