Table knife profiling edging machine

Abstract

The invention relates to the technical field of edging machines, in particular to a table knife profiling edging machine which comprises a profiling die used for adjusting the shape of a profiling resin grinding wheel and a clamp used for clamping and fixing a knife blank, the position of the profiling die is adjusted through a first adjusting component, and the position of the clamp is adjusted through a second adjusting component; the clamp comprises a fixed shaft fixedly arranged, a rotating arm rotationally connected to the fixed shaft, and a chuck arranged at one end of the rotating arm and used for clamping a cutter blank. The axis of the fixing shaft is parallel to the axis of the profiling resin grinding wheel, and the axis of the fixing shaft, the axis of the profiling resin grinding wheel and the bisector of the cutter blank which is clamped by the clamp and is in the horizontal state are all located in the horizontal plane. And the rotating arm drives the cutter blank to rotate between a first preset angle and a second preset angle. The peripheral surface of the profiling resin grinding wheel can completely meet the arc line of the cutting edge, it is ensured that the cutting edge line of a cutter blank can be in full contact with the peripheral surface of the profiling resin grinding wheel, and the sharpness and the qualification rate of the cutting edge are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of edge grinding machines, specifically to a contour edge grinding machine for table knives. Background Art

[0002] Tool edge grinding is to make the cutting edge sharp through methods such as grinding. Its core value lies in improving cutting performance, safety, and durability.

[0003] Currently, the method for double-sided edge grinding of tools is that workers directly hold the tool and grind the two sides to open the edge. The quality of the tool edge is directly related to the operation method of the workers. Therefore, the edge grinding quality of traditional operations is very unstable. Moreover, when manually grinding the edge on magnesium oxide or alumina abrasive belts, it will be affected by people, machines, materials, methods, and the environment. For example: long working hours, decreased energy, poor hand contouring, large deviation in edge angles, inconsistent edge widths, large variations in speed, short contact time and short residence time of the edge on the abrasive, resulting in a rough edge surface and thus a dull edge. Another example: in terms of auxiliary materials, the ceramic grinding wheel and abrasive belt have coarse and not fine enough abrasive grains, which will also result in a dull edge. And if the contact surface is narrow (less than or equal to 5 cm) and the residence time is short, the edge will be easily deformed; if the contact surface is wide (more than 10 cm), it will be impossible to perform contouring because the human strength is limited and it is impossible to hold the tool piece better and more stably for contouring, and the qualified rate of the sharpness of the cutting edge is less than 60%. Therefore, it is necessary to drive the grinding wheel and abrasive belt to rotate through a high-speed motor to cut the edge. The cutting amount is large, the self-sharpening edge roughness reaches 50 μm, the resistance to cutting food is large, and the cutting edge is not sharp. Summary of the Invention

[0004] The purpose of the present invention is to provide a contour edge grinding machine for table knives to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A contour edge grinding machine for table knives includes a profiling die for adjusting the shape of the profiling resin grinding wheel and a fixture for clamping the knife blank. Among them, the profiling die adjusts its position through a first adjusting component, and the fixture adjusts its position through a second adjusting component;

[0007] The fixture includes a fixed shaft fixedly arranged, a rotating arm rotatably connected to the fixed shaft, and a chuck arranged at one end of the rotating arm and used for clamping the knife blank;

[0008] The axis of the fixed shaft is parallel to the axis of the profiling resin grinding wheel, and the axis of the fixed shaft, the axis of the profiling resin grinding wheel, and the bisector of the knife blank clamped by the fixture and in a horizontal state are all located in the horizontal plane;

[0009] The rotating arm drives the tool blank to rotate between a first predetermined angle and a second predetermined angle, and the first predetermined angle and the second predetermined angle are symmetrically arranged on the upper and lower sides of the horizontal plane; when the tool blank is at the first predetermined angle, the profiling resin grinding wheel can be used to grind the first cutting edge of the tool blank; when the tool blank is at the second predetermined angle, the profiling resin grinding wheel can be used to grind the second cutting edge of the tool blank.

[0010] Preferably, the chuck includes a rotating shaft rotatably connected to one end of the rotating arm through a second bearing seat, a centering and clamping portion provided at one end of the rotating shaft, and a driving component for driving the rotating shaft to rotate;

[0011] The centering and clamping portion includes a rotating piece fixed at one end of the rotating shaft and two shaft rods rotatably connected to the rotating piece through a third bearing seat, and the rotating piece and the two shaft rods cooperate to form a U-shaped structure.

[0012] Preferably, clamping plates are fixedly connected to the shaft rods, and after the tool blank is clamped, there is an overlapping portion between the two clamping plates in the direction perpendicular to the side surface of the tool blank;

[0013] The clamping surface of the clamping plate is provided with a gasket.

[0014] Preferably, the chuck further includes a gear, a rack engaged with each other, and a synchronizing rod fixedly connected to the rack;

[0015] The gear is coaxially and fixedly sleeved outside the rotating shaft;

[0016] The synchronizing rod is driven by the driving component to move linearly.

[0017] Preferably, the driving component includes a driving cylinder, and the free end of the driving cylinder is fixedly connected to the synchronizing rod through a synchronizing block.

[0018] Preferably, the chuck further includes a fixing frame, an upper limit frame and a lower limit frame;

[0019] The fixed shaft, the upper limit frame and the lower limit frame are all fixedly arranged on the fixing frame, and the upper limit frame and the lower limit frame are symmetrically distributed on both sides of the fixed shaft;

[0020] When the rotating arm contacts the upper limit frame, the tool blank is at the first predetermined angle; when the rotating arm contacts the lower limit frame, the tool blank is at the second predetermined angle.

[0021] Preferably, both the upper limit frame and the lower limit frame include a connecting block and an inclined block fixedly connected; wherein, the connecting block is fixedly installed on the fixing frame;

[0022] A positioning groove is formed on the side of the inclined block facing the rotating arm, and a through groove is formed on the side of the inclined block away from the rotating arm;

[0023] Studs are fixedly arranged on both the upper and lower sides of the rotating arm, and nuts are threadedly connected to the studs.

[0024] Preferably, the first adjusting member includes a lateral adjuster and a first longitudinal adjuster;

[0025] The second adjusting member includes a second longitudinal adjuster and an up - down adjuster.

[0026] Preferably, there are at least two rotating arms, and an intermediate rod is fixedly connected between two adjacent rotating arms.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] 1. The present invention can customize the length of the profiling resin grinding wheel. The profiling resin grinding wheel can fully meet the length of the blade edge, and is processed on a lathe according to the arc of the blade edge line of the blade blank, so that the peripheral surface of the profiling resin grinding wheel can fully meet the arc of the blade edge, ensuring that the blade edge line of the blade blank can be in perfect contact with the peripheral surface of the profiling resin grinding wheel, and the single - sided blade edge of the blade blank can be ground at one time.

[0029] 2. During the entire double - edge opening process of the blade blank of the present invention, the blade blank only needs to be clamped once, and then by rotating the entire fixture to two predetermined inclination angles, namely the first and the second, the double - edge opening operation of the tool can be completed. This effectively avoids the clamping error generated during the process of clamping the blade blank on both sides, significantly improves the consistency of the blade edges on both sides of the blade blank, and ensures the edge - opening quality of the blade blank. Moreover, by adopting the above - mentioned rotation method, no matter which predetermined angle the fixture drives the blade blank to rotate to, the lateral direction of the blade blank will not change. For example, the head and tail ends of the blade blank at the first predetermined angle position are the same as those at the second predetermined angle position. That is to say, no matter which predetermined angle the fixture drives the blade blank to rotate to, the edge - opening position of the tool can always be kept in contact with the peripheral surface of the profiling resin grinding wheel. In this way, the blade blank can be adapted to the special - shaped peripheral surface of the profiling resin grinding wheel at the two predetermined angle positions, thus ensuring the grinding quality. Moreover, since only rotating the blade blank can complete the double - edge opening, the grinding efficiency is improved, and the sharpness of the blade edge and the qualification rate can also be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 is a top - view structure schematic diagram of the profiling die and the profiling resin grinding wheel of the present invention;

[0032] Figure 3 is a schematic diagram of the structure of the fixture of the present invention;

[0033] Figure 4 is a top - view structure schematic diagram of the fixture in a horizontal state of the present invention;

[0034] Figure 5It is a schematic bottom view of the fixture of the present invention when it is in a horizontal state;

[0035] Figure 6 It is a schematic partial structure view of the fixture of the present invention;

[0036] Figure 7 It is a schematic overall structure view of the centering and clamping part of the present invention;

[0037] Figure 8 For the present invention Figure 7 schematic partial structure view;

[0038] Figure 9 It is a schematic side view of the clamping plate of the present invention;

[0039] Figure 10 It is a schematic structure view of the fixture and the profiling resin grinding wheel of the present invention.

[0040] In the figure:

[0041] 101, profiling die; 102, profiling resin grinding wheel; 103, lateral adjuster; 104, first longitudinal adjuster; 105, fixture; 106, second longitudinal adjuster; 107, up and down adjuster;

[0042] 1, fixing frame; 2, fixing shaft; 3, rotating arm; 31, stud; 32, nut; 33, intermediate rod; 34, first bearing seat; 4, upper limit frame; 41, connecting block; 42, inclined block; 43, positioning groove; 44, through groove; 5, lower limit frame; 6, chuck; 61, second bearing seat; 62, gear; 63, rotating shaft; 64, synchronizing rod; 65, rack; 66, centering and clamping part; 661, rotating piece; 662, shaft rod; 663, third bearing seat; 664, clamping plate; 665, gasket; 666, overlapping part; 67, driving component; 671, driving cylinder; 672, synchronizing block; 673, slider; 674, slide rail;

[0043] 200, tool blank;

[0044] 300, equidistant line;

[0045] 400, horizontal plane. Specific embodiments

[0046] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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 the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0047] Please refer to Figures 1 - 10, the present invention provides a technical solution:

[0048] The table knife profiling and edge-grinding machine includes a profiling die 101 for adjusting the shape of the profiling resin grinding wheel 102 and a fixture 105 for clamping the knife blank 200. Among them, the profiling die 101 adjusts its position through a first adjusting component, and the first adjusting component includes a transverse adjuster 103 and a first longitudinal adjuster 104; the fixture 105 adjusts its position through a second adjusting component, and the second adjusting component includes a second longitudinal adjuster 106 and an up-down adjuster 107; the above-mentioned transverse adjuster 103, first longitudinal adjuster 104, second longitudinal adjuster 106 and up-down adjuster 107 can all be adjusted in a screw manner. Specifically, it is to adjust the positions of the profiling die 101 and the profiling resin grinding wheel 102 by rotating bolts. For example, by rotating the screw of the transverse adjuster 103, the profiling die 101 can be driven to move along its own axis, and by rotating the screw of the first longitudinal adjuster 104, the profiling die 101 can be driven to approach or move away from the profiling resin grinding wheel 102. The settings of the transverse adjuster 103 and the first longitudinal adjuster 104 can facilitate the staff to adjust the relative positions between the profiling die 101 and the profiling resin grinding wheel 102; the second longitudinal adjuster 106 and the up-down adjuster 107 are used to adjust the relative positions between the fixture 105 and the profiling resin grinding wheel 102.

[0049] In the present invention, the peripheral surface of the profiling resin grinding wheel 102 needs to be adjusted according to the shape of the edge line of the knife blank 200. As Figure 2 shown, the peripheral surface shape of the profiling resin grinding wheel 102 can be adapted to the edge line of the knife blank 200 in this embodiment. When the knife blank 200 is at the first predetermined angle or the second predetermined angle, the knife blank 200 can be driven by the second longitudinal adjuster 106 to approach and contact the profiling resin grinding wheel 102, so as to use the profiling resin grinding wheel 102 to grind and edge-grind the knife blank 200. Moreover, since the peripheral surface shape of the profiling resin grinding wheel 102 is adapted to the edge line of the knife blank 200, the edge-grinding operation of the knife blank 200 can be completed in one go through the profiling resin grinding wheel 102. In other words, the present invention can customize the length of the profiling resin grinding wheel 102, and the profiling resin grinding wheel 102 can fully meet the blade length and be processed on a lathe according to the arc of the edge line of the knife blank 200, so that the peripheral surface of the profiling resin grinding wheel 102 can fully meet the arc of the edge, ensuring that the edge line of the knife blank 200 can be in perfect contact with the peripheral surface of the profiling resin grinding wheel 102 and grinding out the single-sided edge of the knife blank 200 in one go.

[0050] Furthermore, in order to improve the edge-grinding accuracy and the quality of the tool, the present invention also designs a special fixture 105, and its specific structure and working principle are as follows:

[0051] The fixture 105 includes a fixed shaft 2 fixedly arranged, a rotating arm 3 rotatably connected to the fixed shaft 2, and a chuck 6 arranged at one end of the rotating arm 3 and used for clamping the blank 200; moreover, the axis of the fixed shaft 2 is parallel to the axis of the profiling resin grinding wheel 102, and the axis of the fixed shaft 2, the axis of the profiling resin grinding wheel 102, and the bisector 300 of the blank 200 clamped by the fixture 105 and in a horizontal state are all located in the horizontal plane 400, as Figure 10 shown in the horizontal plane 400. There are at least two rotating arms 3, and an intermediate rod 33 is fixedly connected between two adjacent rotating arms 3. The rotating arm 3 is rotatably connected to the fixed shaft 2 through a first bearing seat 34.

[0052] The rotating arm 3 drives the blank 200 to rotate between a first predetermined angle and a second predetermined angle, and the first predetermined angle and the second predetermined angle are symmetrically arranged on the upper and lower sides of the horizontal plane 400; when the blank 200 is at the first predetermined angle, the profiling resin grinding wheel 102 can be used to grind the first cutting edge of the blank 200; when the blank 200 is at the second predetermined angle, the profiling resin grinding wheel 102 can be used to grind the second cutting edge of the blank 200. Specifically, since the blank 200 needs to be ground on both sides, the above-mentioned first cutting edge and second cutting edge are the two cutting edges of the blank 200.

[0053] The working principle of the above aspect is: as Figure 10 shown, the blank 200 is at the second predetermined angle and is performing the grinding operation of the second cutting edge. After the grinding of the second cutting edge is completed, first use the Figure 1 second longitudinal regulator 106 in to adjust the blank 200 to move away from the profiling resin grinding wheel 102, then rotate the blank 200 from the second predetermined angle to the first predetermined angle and fix the position of the blank 200, and then adjust the blank 200 to move close to the profiling resin grinding wheel 102 through the second longitudinal regulator 106, and the grinding and edge-opening operation of the first cutting edge can be carried out.

[0054] In the above technical solution, during the entire double-sided edge grinding process of the knife blank 200, the knife blank 200 only needs to be clamped once, and then by rotating the entire fixture to two predetermined inclination angles, the first and the second, the double-sided edge grinding operation of the tool can be completed, effectively avoiding the clamping error generated during the process of clamping the knife blank 200 on both sides, significantly improving the consistency of the two-sided edge of the knife blank 200, and ensuring the edge grinding quality of the knife blank 200. Moreover, by adopting the above rotation method, no matter which predetermined angle the fixture 105 drives the knife blank 200 to rotate to, the lateral direction of the knife blank 200 will not change. For example, the head and tail ends of the knife blank 200 at the first predetermined angle position are consistent with the head and tail ends of the knife blank 200 at the second predetermined angle position. That is to say, no matter which predetermined angle the fixture 105 drives the knife blank 200 to rotate to, the edge grinding position of the tool can be kept in contact with the peripheral surface of the profiling resin grinding wheel 102. In this way, the knife blank 200 can be adapted to the profiled peripheral surface of the profiling resin grinding wheel 102 at the two predetermined angle positions, thus ensuring the grinding quality. Moreover, since only rotating the knife blank 200 can complete the double-sided edge grinding, the grinding efficiency is improved.

[0055] The chuck 6 described above includes a rotating shaft 63 rotatably connected to one end of the rotating arm 3 through a second bearing seat 61, a centering and clamping portion 66 provided at one end of the rotating shaft 63, and a driving member 67 for driving the rotating shaft 63 to rotate. In this embodiment, the rotating arm 3 is cylindrical, and the rotating shaft 63 is coaxially arranged with the rotating arm 3. The function of the centering and clamping portion 66 is that after the centering and clamping portion 66 clamps the knife blank 200, the plane where the bisecting line 300 of the knife blank 200 is located coincides with the plane where the axis of the rotating shaft 63 is located. That is to say, after ensuring that the knife blank 200 is clamped, the axis of the fixed shaft 2, the axis of the profiling resin grinding wheel 102, and the bisecting line 300 of the knife blank 200 clamped by the fixture 105 and in a horizontal state are all located in the horizontal plane 400. The advantage of such a setting is that when the knife blank 200 rotates by the first predetermined angle or the second predetermined angle for grinding and edge opening, the opening depth, edge angle, etc. of the first and second edges of the knife blank 200 will remain consistent, and in this way, the sharpness and qualification rate of the edge can also be improved.

[0056] The centering clamping part 66 includes a rotating piece 661 fixed to one end of the rotating shaft 63, and two shaft rods 662 rotatably connected to the rotating piece 661 through a third bearing seat 663. The rotating piece 661 and the two shaft rods 662 cooperate to form a U-shaped structure, and the distances between the axes of the two shaft rods 662 and the axis of the rotating shaft 63 are equal; when the rotating shaft 63 rotates, the two shaft rods 662 can be driven to rotate synchronously through the rotating piece 661, so as to ensure that after the two shaft rods 662 clamp the blank 200, the plane where the bisecting line 300 of the blank 200 is located coincides with the plane where the axis of the rotating shaft 63 is located; moreover, after the blank 200 is clamped by using such a clamping structure, the space occupied by the centering clamping part 66 is small and will not have an adverse effect on the edge-opening operation of the blank 200. For example, after the centering clamping part 66 clamps the blank 200, during the process of edge-opening the blank 200 by the profiling resin grinding wheel 102, the centering clamping part 66 will not contact the profiling resin grinding wheel 102, avoiding the situation of wear of the profiling resin grinding wheel 102.

[0057] To improve the fastening property after clamping, in this embodiment, a clamping plate 664 is fixedly connected to the shaft rod 662. The clamping plate 664 can increase the contact area between the shaft rod 662 and the blank 200 and improve the clamping stability. Further, as Figure 9 shown, after clamping the blank 200, in the direction perpendicular to the side surface of the blank 200, there is an overlapping part 666 between the two clamping plates 664, and the overlapping part 666 is the contact part between the clamping plate 664 and the blank 200; the function of the overlapping part 666 is to prevent the blank 200 from being bent and deformed after being clamped by the two shaft rods 662, ensuring the edge-opening quality of the blank 200. A gasket 665 is arranged on the clamping surface of the clamping plate 664. The gasket 665 is used to increase the friction between the clamping plate 664 and the blank 200, and at the same time, the hardness of the gasket 665 should be less than the hardness of the blank 200 to avoid scratching the blank 200.

[0058] The chuck 6 further includes a gear 62, a rack 65 engaged with each other, and a synchronizing rod 64 fixedly connected to the rack 65; the gear 62 is coaxially and fixedly sleeved outside the rotating shaft 63; the synchronizing rod 64 is driven to move linearly by a driving component 67. In this embodiment, by pushing the synchronizing rod 64 and the rack 65 to move, the rotation of the rotating shaft 63 can be realized in cooperation with the gear 62. The overall structure is simple and the occupied space is small.

[0059] The driving component 67 includes a driving cylinder 671. In this embodiment, the driving cylinder 671 can adopt an electric cylinder, and the free end of the driving cylinder 671 is fixedly connected to the synchronizing rod 64 through a synchronizing block 672. A slide rail 674 is fixedly arranged on the intermediate rod 33, and a slider 673 is slidably arranged on the slide rail 674. The slider 673 is fixedly connected to the synchronizing rod 64.

[0060] The collet 6 further includes a fixing bracket 1, an upper limit bracket 4 and a lower limit bracket 5; the fixed shaft 2, the upper limit bracket 4 and the lower limit bracket 5 are all fixedly arranged on the fixing bracket 1, and the upper limit bracket 4 and the lower limit bracket 5 are symmetrically distributed on both sides of the fixed shaft 2; when the rotating arm 3 contacts the upper limit bracket 4, the blank 200 is at a first predetermined angle; when the rotating arm 3 contacts the lower limit bracket 5, the blank 200 is at a second predetermined angle; by setting the upper limit bracket 4 and the lower limit bracket 5 to limit the position of the rotating arm 3, it is convenient to rotate the rotating arm 3 to the first predetermined angle or the second predetermined angle.

[0061] Further, both the upper limit bracket 4 and the lower limit bracket 5 include a connecting block 41 and an inclined block 42 fixedly connected; wherein, the connecting block 41 is fixedly installed on the fixing bracket 1; a positioning groove 43 is formed on the side of the inclined block 42 facing the rotating arm 3, and the positioning groove 43 is arranged to match the rotating arm 3, and a through groove 44 is formed on the side of the inclined block 42 away from the rotating arm 3; studs 31 are fixedly installed on both the upper and lower sides of the rotating arm 3, and nuts 32 are threadedly connected to the studs 31. Specifically, when the rotating arm 3 rotates into the positioning groove 43, the stud 31 just penetrates through the through groove 44, and at this time, the nut 32 is tightened, and the rotating arm 3 can be locked on the upper limit bracket 4 or the lower limit bracket 5, ensuring the stability of the blank 200 during the edge grinding process.

[0062] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Table knife profiling sharpening machine, characterized in that: It includes a profiling die for adjusting the shape of the profiling resin grinding wheel and a clamp for clamping the knife blank, wherein the profiling die is adjusted in position by a first adjusting component, and the clamp is adjusted in position by a second adjusting component; The clamp includes a fixed shaft, a rotating arm rotatably connected to the fixed shaft, and a clamping head arranged at one end of the rotating arm and used for clamping the knife blank; The axis of the fixed shaft is parallel to the axis of the profiling resin grinding wheel, and the bisectors of the axis of the fixed shaft, the axis of the profiling resin grinding wheel, and the knife blank clamped by the fixture and in a horizontal state are all located in the horizontal plane; The rotating arm drives the knife blank to rotate between a first predetermined angle and a second predetermined angle, and the first predetermined angle and the second predetermined angle are symmetrically arranged on the upper and lower sides of the horizontal plane; when the knife blank is located at the first predetermined angle, the first cutting edge of the knife blank can be grinded by a contoured resin grinding wheel; when the knife blank is located at the second predetermined angle, the second cutting edge of the knife blank can be grinded by a contoured resin grinding wheel.

2. The table knife profiling sharpening machine according to claim 1, characterized in that: The chuck includes a rotating shaft rotatably connected to one end of the rotating arm through a second bearing seat, a centering clamping portion arranged at one end of the rotating shaft, and a driving component for driving the rotating shaft to rotate; The centering clamping part comprises a rotating piece fixed at one end of the rotating shaft, and two shaft rods rotatably connected to the rotating piece through a third bearing seat. The rotating piece and the two shaft rods cooperate to form a U-shaped structure.

3. The table knife profiling sharpening machine according to claim 2, characterized in that: A clamping plate is fixedly connected to the shaft rod. After the knife blank is clamped, there is an overlapping portion between the two clamping plates in a direction perpendicular to the side of the knife blank. The clamping surface of the clamping plate is provided with a gasket.

4. The table knife profiling sharpening machine according to claim 2, characterized in that: The chuck also includes a gear and a rack that are meshed and connected, and a synchronization rod that is fixedly connected to the rack; The gear is coaxially fixedly sleeved on the outer side of the rotating shaft; The synchronous rod is driven by the driving component to move linearly.

5. The table knife profiling sharpening machine according to claim 4, characterized in that: The driving component comprises a driving cylinder, and a free end of the driving cylinder is fixedly connected to a synchronization rod through a synchronization block.

6. The table knife profiling sharpening machine according to claim 1, characterized in that: The chuck also includes a fixed frame, an upper limit frame and a lower limit frame; The fixed shaft, the upper limit frame and the lower limit frame are all fixedly arranged on the fixed frame, and the upper limit frame and the lower limit frame are symmetrically distributed on both sides of the fixed shaft; When the rotating arm contacts the upper limit frame, the knife blank is at a first predetermined angle; when the rotating arm contacts the lower limit frame, the knife blank is at a second predetermined angle.

7. The table knife profiling sharpening machine according to claim 6, characterized in that: The upper limit frame and the lower limit frame both include a fixedly connected connecting block and an inclined block; wherein the connecting block is fixedly mounted on the fixing frame; A positioning groove is provided on the side of the inclined block facing the rotating arm, and a through groove is provided on the side of the inclined block away from the rotating arm; Studs are fixed on both upper and lower sides of the rotating arm, and nuts are threadedly connected on the studs.

8. The table knife profiling sharpening machine according to claim 1, characterized in that: The first adjustment component includes a lateral adjuster and a first longitudinal adjuster; The second adjusting component includes a second longitudinal adjuster and an up-and-down adjuster.

9. The table knife profiling sharpening machine according to claim 1, characterized in that: At least two rotating arms are provided, and an intermediate rod is fixedly connected between two adjacent rotating arms.

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