Production process of carton grooving cutter

Abstract

The invention belongs to the field of cutter machining, and particularly relates to a carton grooving cutter production process. The specification layout of the cutter blank is planned in advance on the steel plate raw material, the appearance blanking allowance of the cutter blank is 1 mm, the thickness of the cutter blank is 2 mm, the production cost can be reduced, and the thickness machining operation time can be shortened. Secondly, laser cutting stress is solved through annealing, surface rough grinding is conducted, the thickness allowance is controlled to be 1 mm, a milling machine electromagnetic chuck is used for adsorbing and fixing the cutter blanks to complete appearance machining operation, the multiple cutter blanks are clamped through a clamp, the center of the initial cutter blank is adjusted to coincide with the center of a main shaft, and cutting edge machining consistency is achieved; the method comprises the following steps: carrying out quenching treatment to enhance the hardness, then carrying out flattening and tempering treatment, and finally carrying out semi-accurate grinding and circular truncated cone accurate grinding to finish the production operation of the grooving cutter, so that the edge tooth top consistency of the grooving cutter is high and is controlled within 0.02 mm, the surface roughness is Ra 0.6-Ra 0.4 mu m, and the thickness tolerance is + / -0.002 mm.

Description

Technical Field

[0001] The invention belongs to the field of tool processing, and in particular relates to a production process of a carton slotting knife. Background Art

[0002] Carton slotting machine is an important equipment in the carton processing production line. Carton slotting machine mainly uses the principle of pressure and cutting, and the knife and creasing roller in the die-cutting mechanism work together to press and cut the cardboard into the required shape. Its core components mainly include feeding system, cutting system, control system and transmission system. Among them, the slotting knife is one of the important parts of the cutting system, and the performance index of the slotting knife is the quality of the slotting.

[0003] The carton slotting knife is basically in an arc shape, and the outer peripheral surface is the cutting edge surface. The existing slotting knife processing methods include shearing, surface grinding, shape processing, cutting edge processing and finishing, but there will be the following problems:

[0004] 1. Too much waste material during shearing and cutting, resulting in high production costs.

[0005] 2. When processing the shape, the existing shape processing adopts the caliper clamping form, but the part clamped by the caliper cannot be milled. In this way, when the thickness of the blade is set, it needs to be thickened to meet the caliper clamping, which increases the production cost.

[0006] 3. When processing the cutting edge, especially when processing the cutting edges of multiple slotting cutters with different radius sizes, the cutting edge lacks special tooling to ensure the consistency of the distance between the cutting edge tooth tip and the center of the slotting cutter, which causes the slotting cutter to have burrs during actual use. Summary of the invention

[0007] In order to solve the above technical problems, the inventors have obtained the technical solution of the present invention through practice and summary. The present invention adopts the following technical solution:

[0008] A carton slotting knife production process, comprising:

[0009] Step 1: Cutting the slab

[0010] Select a slab of suitable material and plan the blade shape distribution map in advance according to the size of the slab, import it into the laser cutting machine system, and complete the blade blank cutting by laser cutting to obtain the initial blade blank. The blade blank shape allowance is 1mm and the thickness allowance is 2mm;

[0011] Step 2, Annealing

[0012] The initial blade blank is sent to an annealing furnace for annealing treatment at a temperature of 780-880°C for 1-6 hours, cooled to 600-700°C in the annealing furnace, and cooled to room temperature by air out of the furnace to obtain an annealed blade blank;

[0013] Step 3: Rough grinding of the surface

[0014] Assemble the flattened blade blank on a grinder, and roughly grind the two side surfaces to obtain a roughly ground blade blank with a thickness allowance of 1 mm;

[0015] Step 4: Shape processing

[0016] A positioning block is installed on the side of the electromagnetic chuck of the CNC milling machine. A positioning substrate 1 and a positioning substrate 2 are placed on the electromagnetic chuck and abut against the corresponding positioning blocks. The positioning substrate 1 and the positioning substrate 2 are made of stainless steel or aluminum alloy. The flattened blade blank is placed flat on the electromagnetic chuck, and two adjacent side walls are attached to the positioning substrate 1 and the positioning substrate 2. The electromagnetic chuck is energized, and the positioning substrate 1 and the positioning substrate 2 are taken down. The contour of the flattened blade blank is milled to obtain the tool shape to obtain the initial blade blank.

[0017] Step 5: Edge processing

[0018] The fixture is mounted on the flange of the main shaft of the four-axis CNC machining center, and multiple pieces of preliminary tool blanks are stacked and vertically mounted on the fixture to ensure that the center of the preliminary tool blank coincides with the axis of the main shaft of the four-axis CNC machining center, and a tool edge is machined on the outer side of the tool blank to obtain a tool blank with an edge;

[0019] Step 6: Quenching

[0020] The blade blank is quenched and cooled to 200-300℃;

[0021] Step 7: Flatten the knife blank

[0022] Transfer to the press and flatten it;

[0023] Step 8, Tempering

[0024] The flattened blade blank is clamped between two clamping plates, and the two clamping plates are connected by screws to clamp the blade blank, and then sent into a box-type furnace for tempering treatment;

[0025] Step 9, Finishing

[0026] The surfaces of both sides of the tempered blade blank are semi-finely ground by a grinder, and the thickness allowance is 0.5mm;

[0027] The surfaces on both sides of the blade blank are then finely ground by a circular table to a surface roughness of Ra0.6-Ra0.4μm and a thickness tolerance of ±0.002mm.

[0028] Preferably, the fixture includes a mounting table, an extension body is arranged on the mounting table, a radial T-slot is arranged in the middle of the extension body, a T-block is slidably fitted in the radial T-slot, a movable plate is installed on the T-block, the movable plate is arranged perpendicular to the mounting table, a fixed plate one and a fixed plate two are installed on the movable plate, the fixed plate one and the fixed plate two are both vertically mounted on the movable plate, the fixed plate one and the fixed plate two are both arranged parallel to the mounting table, the preliminary blade blank is installed between the fixed plate one and the fixed plate two, the fixed plate one is located on the side of the fixed plate two away from the mounting table, a tightening piece is installed on the fixed plate one, the tightening piece is used to press on the side of the preliminary blade blank, a connecting block is slidably fitted in the radial T-slot, a connecting piece is installed on the connecting block, and a supporting block pressed on the mounting table is mounted on the outer side of the connecting piece.

[0029] Preferably, the pressing member includes a screw rod and a pressing block installed at the end of the screw rod, and the pressing block is located between the first fixing plate and the second fixing plate and is rotatably installed with the end of the screw rod.

[0030] Preferably, the cutting edge processing steps are as follows:

[0031] Step 611: Tooling assembly

[0032] Connect the moving plate to the T-shaped block in the radial T-shaped groove through long bolts, install the fixed plate 1 and the fixed plate 2 on the moving plate through bolts, install the top fastener on the fixed plate 1, and install the mounting platform on the flange through bolts;

[0033] Step 612, positioning the blade blank

[0034] The positioning rod is taken out from the tool magazine and installed on the tool holder. The four-axis CNC machining center system controls the tool holder to move the positioning rod to the rear side of the preliminary blade blank to be installed. Multiple pieces of preliminary blade blanks are abutted against the positioning rod one by one and the bottom is attached to the moving plate. After each piece of preliminary blade blank is installed, the main axis moves away from the positioning rod by a distance of the thickness of the preliminary blade blank until all the preliminary blade blanks are placed.

[0035] Step 613: Clamping the initial blade blank

[0036] By adjusting the top clamp, the clamping block presses multiple preliminary blade blanks on the side of the fixed plate 2 relative to the fixed plate 1, and the clamping force is 0.1-1.0kN;

[0037] Step 614: Edge Forming

[0038] The four-axis CNC machining center spindle drives the initial blade blank to rotate, and the milling cutter on the tool holder is used to process the cutting edge to obtain the cutting edge blade blank;

[0039] Step 615, cutting

[0040] Adjust the clamping piece in reverse direction to remove the cutting edge blank.

[0041] Preferably, two slide grooves are provided on the upper surface of the movable plate, and an installation groove is provided in the middle of the area between the two slide grooves. The slide groove and the installation groove are located on the side of the movable plate close to the fixed plate. A gear body is rotatably installed in the installation groove. Slide bars are slidably matched in the two slide grooves. Tooth surfaces are provided on the opposite sides of the two slide bars and mesh with the gear body. Positioning bars are installed on the two slide bars, and the positioning bars are attached to the upper surface of the movable plate.

[0042] Preferably, the cutting edge processing steps are as follows:

[0043] Step 621, tooling assembly

[0044] Connect the moving plate to the T-shaped block in the radial T-shaped groove through long bolts, install the fixed plate 1 and the fixed plate 2 on the moving plate through bolts, install the top fastener on the fixed plate 1, and install the mounting platform on the flange through bolts;

[0045] Step 622, positioning the blade blank

[0046] A plurality of preliminary blade blanks are stacked horizontally and placed on a movable plate between a first fixed plate and a second fixed plate, and a positioning bar is moved close to the center of the movable plate so that the center of the preliminary blade blank and the center of the movable plate are located in the same vertical plane, and it is ensured that the bottom of the preliminary blade blank cannot be separated from the upper surface of the movable plate;

[0047] Step 623: Clamping the initial blade blank

[0048] By adjusting the top clamp, the clamping block presses multiple preliminary blade blanks on the side of the fixed plate 2 opposite to the fixed plate 1, and the clamping force is 0.1-1.0kN;

[0049] Step 624: Edge Forming

[0050] The four-axis CNC machining center spindle drives the initial blade blank to rotate, and the milling cutter on the tool holder is used to process the cutting edge to obtain the cutting edge blade blank;

[0051] Step 625, cutting

[0052] Adjust the clamping piece in reverse direction to remove the cutting edge blank.

[0053] Preferably, the clamping member also includes an anti-retraction member, an axial groove is provided on the screw, the anti-retraction member is sleeved on the outer side of the screw, the anti-retraction member includes a circumferential stopper and a clamping member, the circumferential stopper and the axial groove are axially slidably matched, the clamping member is threadedly connected to the outer side of the screw, and a slot is provided on one side of the fixed plate one relative to the fixed plate two, and the position of the slot and the circumferential stopper correspond and are adaptably installed.

[0054] Preferably, the movable plate is provided with two symmetrically distributed movable blocks at the front and rear, the two movable blocks are respectively located at the two sides of the preliminary blade blank, a clamping claw is arranged on the opposite side of the two movable blocks, an ear shaft 1 and an ear shaft 2 are arranged on the side of the clamping claw, a guide groove 1 corresponding to the position of the ear shaft 1 and a guide groove 2 corresponding to the position of the ear shaft 2 are arranged on the movable block, the guide groove 1 and the guide groove 2 are both vertically distributed and an arc groove is arranged on the top of the guide groove 2, a tension spring is connected between the clamping claw and the movable block, and the two clamping claws clamp the side wall from the front and rear sides of the preliminary blade blank respectively;

[0055] An elastic telescopic body is arranged on the top of the pressing claw, and a pressure-bearing body is arranged on the bottom;

[0056] The side wall of the initial blade blank is provided with a connecting groove, and the connecting groove and the elastic telescopic body are corresponding in position and adapted to each other.

[0057] Preferably, the cutting edge processing steps are as follows:

[0058] Step 621, tooling assembly

[0059] Connect the moving plate with the T-shaped block in the radial T-shaped groove through long bolts, install the fixed plate 1 and the fixed plate 2 on the moving plate through bolts, install a screw on the fixed plate 1, adjust one end of the screw to between the fixed plate 1 and the fixed plate 2, and install a clamping block at the end through bolts to ensure that the clamping block and the screw rotate relative to each other, and install the mounting platform on the flange through bolts;

[0060] Step 622, positioning the blade blank

[0061] Multiple blanks are stacked horizontally into a stack, and the stack is placed vertically downward on the movable plate between the first fixed plate and the second fixed plate. During the lowering process, the pressing claws automatically adjust the position of the stack so that the center of the blank and the center of the movable plate are located in the same vertical plane, and the bottom of the stack is pressed against the movable plate under the action of the tension spring;

[0062] Step 623: Clamping the initial blade blank

[0063] By adjusting the top clamp, the clamping block presses multiple preliminary blade blanks on the side of the fixed plate 2 relative to the fixed plate 1, and the clamping force is 0.05-0.5kN;

[0064] Step 624: Edge Forming

[0065] The four-axis CNC machining center spindle drives the initial blade blank to rotate, and the milling cutter on the tool holder is used to process the cutting edge to obtain the cutting edge blade blank;

[0066] Step 625, cutting

[0067] Adjust the clamping piece in the reverse direction to lift the cutting edge blank to overcome the tension of the tension spring. After the clamping claw moves to the highest point, the tension spring separates the clamping claw and the cutting edge blank, and the cutting edge blank can be removed.

[0068] Preferably, when the slab material is Cr12MoV steel plate;

[0069] Annealing temperature is 840-880℃, keep warm for 4-6h, cool to 600-650℃ with the furnace, and air cool out of the furnace;

[0070] Quenching temperature is 1020-1060℃, keep warm for 10-20min, and air cool after leaving the furnace;

[0071] The tempering temperature for both times is 180-230℃, kept at temperature for 10-20h, and then air-cooled after being taken out of the furnace;

[0072] Or, when the slab material is 9CrSi steel plate;

[0073] Annealing temperature is 750-800℃, keep warm for 1-2h, cool to 600-700℃ with the furnace, and air cool out of the furnace;

[0074] Quenching temperature 850-900℃, keep warm for 10-20min, oil-cool after leaving the furnace;

[0075] The first tempering temperature is 300-350℃, keep warm for 3-5h, the second tempering temperature is 260-300℃, keep warm for 5-6h, and then air cool after leaving the furnace;

[0076] And before finishing, remove the decarburized layer on the surface to make it bright.

[0077] Compared with the prior art, the present invention has the following beneficial effects:

[0078] 1. The present invention plans the layout of blade specifications on the steel plate raw material in advance. The blanking allowance for the blade shape is 1mm and the thickness is 2mm, which can reduce production costs and thickness processing time. Secondly, annealing is used to solve the laser cutting stress, and then the surface is roughly ground, and the thickness allowance is controlled at 1mm. The electromagnetic suction cup of the milling machine is used to adsorb and fix it to complete the shape processing operation. Multiple blades are clamped by a fixture, and the center of the initial blade is adjusted to coincide with the center of the spindle to achieve the consistency of the edge processing. The quenching treatment enhances the hardness and then is flattened and tempered. Finally, the production operation of the slotting knife is completed through semi-fine grinding and truncated table fine grinding, so that the consistency of the tooth tip of the slotting knife is high, controlled within 0.02mm, the surface roughness is Ra0.6-Ra0.4μm, and the thickness tolerance is ±0.002mm.

[0079] 2. The present invention also provides a special fixture for this purpose. By installing the mounting table on the spindle of the machining center, the center of the mounting table coincides with the spindle axis after installation, and it can be used when processing the cutting edges of slotting knives of different specifications. It is only necessary to move the moving plate along the radial T-slot for a certain distance to meet the center of the slotting knives of this specification coincidence on the spindle axis, so that the cutting edge processing accuracy can be achieved. For slotting knives with smaller curvatures, a screw rod is used to directly tighten them, and for slotting knives with larger curvatures, a screw rod and a clamping block are used to clamp the slotting knives.

[0080] 3. In the specific implementation, if only this type of fixture is used, it is not possible to efficiently and accurately control the coincidence of the center of the blade blank and the center of the spindle. The inventor uses the existing CNC machining center structure and sets the position of the positioning rod as a reference through the system. It is only necessary to fit the back side of the blade blank on the positioning rod to ensure that the center of the blade blank coincides with the spindle axis. Secondly, the spindle can be coordinated to drive the mounting table to move horizontally a distance of the blade blank thickness to the side away from the positioning rod. Each time a blade blank is placed, it moves horizontally a distance of the blade blank thickness to the side away from the positioning rod to achieve the positioning operation of multiple blade blanks, which makes the structure of the tooling the simplest. It is also possible to add a positioning bar on the movable plate to achieve the centering operation of the blade blank center and the spindle axis through the positioning bar. The knife blank can also be placed accurately by clamping on both sides. After placement, the knife blank is restricted in front and back and up and down positions, and then the knife blank can be pressed only by surface pressure. In actual operation, the operator often cannot accurately control the degree of pressing. If it is too large, it will easily cause depression on the surface of the knife blank on the side of the pressing block, and if it is too small, it will easily cause the knife blank to deviate forward and backward. Compared with the above two methods, the pressing force is greatly reduced and there will be no deviation forward and backward.

[0081] 4. In the specific embodiment, the inventor also found that when processing the cutting edge, the spindle drives the blade blank to rotate a certain angle and the tool holder also drives the milling cutter to mill the cutting edge, but vibration occurs during the processing operation, causing the originally pressed top clamp to loosen, and then the blade blank deviates during processing, resulting in the problem of substandard accuracy. The inventor made a partial improvement to the screw of the top clamp, and the circumferential block and the slot were adapted to place the screw loose through the clamp, thereby ensuring the clamping force and preventing deviation during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0082] Figure 1 is a process flow chart of the present invention;

[0083] Figure 2 It is a top view of the shape processing of the present invention;

[0084] Figure 3 is a cross-sectional view of the middle part of the positioning bracket;

[0085] Figure 4It is a schematic diagram of the overall structure of the clamp of the present invention;

[0086] Figure 5 for Figure 4 Schematic diagram of the scheme when the positioning rod is used as the reference;

[0087] Figure 6 It is the connection relationship diagram of the support block and the connecting bolts;

[0088] Figure 7 It is the overall structural schematic diagram of the mobile plate;

[0089] Figure 8 Indication of the fixture Figure 1 ;

[0090] Fig. 9 for Figure 8 A top view of the moving plate;

[0091] Fig.10 Indication of the fixture Figure 2 ;

[0092] Fig.11 for Fig.10 Front and rear cross-section of the moving plate;

[0093] Fig.12 for Fig.11 A partial enlarged view of the middle A;

[0094] Fig.13 for Fig.10 Position relationship diagram of the moving block and the clamping claw;

[0095] Fig.14 for Fig.13 Schematic diagram of the structure of the middle clamping claw;

[0096] Fig.15 for Fig.13 Schematic diagram of the overall structure of the mobile block;

[0097] Fig.16 This is a connection diagram of the circumferential stopper, screw rod, and clamping piece.

[0098] In the figure: 10, electromagnetic chuck; 11, positioning block; 12, positioning substrate 1; 13, positioning substrate 2; 20, fixture; 21, mounting table; 22, extension body; 23, radial T-slot; 24, T-block; 25, moving plate; 2501, moving block; 2502, clamping claw; 2503, ear shaft 1; 2504, ear shaft 2; 2505, guide groove 1; 2506, guide groove 2; 2507, tension spring; 2508 , elastic telescopic body; 2509, pressure-bearing body; 251, slide groove; 252, mounting groove; 253, gear body; 254, slide bar; 256, positioning bar; 26, fixing plate 1; 27, fixing plate 2; 28, tightening member; 281, clamping block; 282, screw; 2821, axial notch; 2822, circumferential stopper; 2823, tightening member; 29, connecting block; 210, connecting member; 211, support block. DETAILED DESCRIPTION

[0099] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0100] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0101] Embodiment 1, a carton slotting knife production process, comprising:

[0102] Step 1: Cutting the slab

[0103] Select a slab of suitable material and plan the blade shape distribution map in advance according to the size of the slab, import it into the laser cutting machine system, and complete the blade blank cutting by laser cutting to obtain the initial blade blank. The blade blank shape allowance is 1mm and the thickness allowance is 2mm;

[0104] Step 2, Annealing

[0105] The initial blade blank is sent to an annealing furnace for annealing treatment at a temperature of 780-880°C for 1-6 hours, cooled to 600-700°C in the annealing furnace, and cooled to room temperature by air out of the furnace to obtain an annealed blade blank;

[0106] Step 3: Rough grinding of the surface

[0107] Assemble the flattened blade blank on a grinder, and roughly grind the two side surfaces to obtain a roughly ground blade blank with a thickness allowance of 1 mm;

[0108] Step 4: Shape processing

[0109] A positioning block 11 is installed on the side of the electromagnetic chuck 10 of the CNC milling machine. A positioning substrate 12 and a positioning substrate 2 13 are placed on the electromagnetic chuck 10 and abut against the corresponding positioning block 11. The positioning substrate 12 and the positioning substrate 2 13 are made of stainless steel or aluminum alloy. The flattened blade blank is placed flat on the electromagnetic chuck 10, and the two adjacent side walls are attached to the positioning substrate 12 and the positioning substrate 2 13. The electromagnetic chuck 10 is energized, and the positioning substrate 12 and the positioning substrate 2 13 are removed. The contour of the flattened blade blank is milled to obtain the tool shape to obtain the initial blade blank.

[0110] Step 5: Edge processing

[0111] The fixture is mounted on the flange of the main shaft of the four-axis CNC machining center, and multiple pieces of preliminary blade blanks are stacked and vertically mounted on the fixture 20, ensuring that the center of the preliminary blade blank coincides with the axis of the main shaft of the four-axis CNC machining center, and a tool edge is machined on the outer side of the tool blank to obtain a blade edge blade blank;

[0112] Step 6: Quenching

[0113] The blade blank is quenched and cooled to 200-300℃;

[0114] Step 7: Flatten the knife blank

[0115] Transfer to the press and flatten it;

[0116] Step 8, Tempering

[0117] The flattened blade blank is clamped between two clamping plates 40, and the two clamping plates 40 are connected by screws to clamp the blade blank, and then sent into a box-type furnace for tempering treatment;

[0118] Step 9, Finishing

[0119] The surfaces of both sides of the tempered blade blank are semi-finely ground by a grinder, and the thickness allowance is 0.5mm;

[0120] The surfaces on both sides of the blade blank are then finely ground by a circular table to a surface roughness of Ra0.6-Ra0.4μm and a thickness tolerance of ±0.002mm.

[0121] When the slab material is Cr12MoV steel plate, the annealing temperature is 840-880°C, kept warm for 4-6 hours, cooled to 600-650°C with the furnace, and air-cooled out of the furnace; the quenching temperature is 1020-1060°C, kept warm for 10-20 minutes, and air-cooled out of the furnace; the tempering temperatures for both times are 180-230°C, kept warm for 10-20 hours, and air-cooled out of the furnace.

[0122] When the slab material is 9CrSi steel plate, the annealing temperature is 750-800°C, kept warm for 1-2h, cooled to 600-700°C with the furnace, and air-cooled out of the furnace; the quenching temperature is 850-900°C, kept warm for 10-20min, and oil-cooled out of the furnace; the primary tempering temperature is 300-350°C, kept warm for 3-5h, the secondary tempering temperature is 260-300°C, kept warm for 5-6h, and air-cooled out of the furnace; and the decarburized layer on the surface is removed to bright before fine machining.

[0123] Embodiment 2, in described process, as Figures 2 to 7 As shown, the fixture 20 includes a mounting platform 21, on which an extension 22 is arranged, a radial T-shaped slot 23 is arranged in the middle of the extension 22, a T-shaped block 24 is slidably fitted in the radial T-shaped slot 23, a movable plate 25 is installed on the T-shaped block 24, the movable plate 25 is arranged vertically on the mounting platform 21, a fixed plate 1 26 and a fixed plate 27 are installed on the movable plate 25, the fixed plate 1 26 and the fixed plate 27 are both vertically mounted on the movable plate 25, and the fixed plate 1 26 and the fixed plate 27 are arranged vertically on the movable plate 25. The first and second fixing plates 27 are arranged parallel to the mounting platform 21. The initial blade blank is installed between the fixing plate 1 26 and the fixing plate 2 27. The fixing plate 1 26 is located on the side of the fixing plate 2 27 away from the mounting platform 21. The fixing plate 1 26 is installed with a pressing piece 28, which is used to press on the side of the initial blade blank. A connecting block 29 is slidably matched in the radial T-shaped groove 23. A connecting piece 210 is installed on the connecting block 29. A supporting block 211 pressed on the mounting platform 21 is set on the outer side of the connecting piece 210. When in use, after the mounting platform 21 is installed on the spindle flange, the axis of the mounting platform 21 coincides with the axis of the spindle. When processing slotting knives of different specifications, it is only necessary to adjust the moving plate 25 along the radial T-shaped groove 23 until the axis of the slotting knives of this specification coincides with the axis of the spindle. The supporting block 211 can be locked in the corresponding position in advance, and then the moving plate 25 can be directly abutted on it to complete the quick placement.

[0124] The pressing member 28 includes a screw rod 282 and a pressing block 281 installed at the end of the screw rod 282. The pressing block 281 is located between the fixing plate 1 26 and the fixing plate 27 and is rotatably installed with the end of the screw rod 282. The connecting bolt passes through the pressing block 281 and is connected to the end of the screw rod 282, thereby ensuring that the pressing block 281 can rotate and can greatly increase the pressing area.

[0125] The first method: The cutting edge processing steps are as follows:

[0126] Step 611: Tooling assembly

[0127] Connect the moving plate 25 to the T-shaped block 24 in the radial T-shaped groove 23 through long bolts, install the fixing plate 1 26 and the fixing plate 2 27 on the moving plate 25 through bolts, install the jacking piece 28 on the fixing plate 1 26, and install the mounting platform 21 on the flange through bolts;

[0128] Step 612, positioning the blade blank

[0129] The positioning rod 50 is taken out from the tool magazine and installed on the tool holder. The four-axis CNC machining center system controls the tool holder to move the positioning rod 50 to the rear side of the initial tool blank to be installed. Figure 4 As shown, multiple pieces of preliminary blade blanks are abutted against the positioning rod 50 one by one and the bottom is attached to the movable plate 25. After each piece of preliminary blade blank is installed, the main axis moves away from the positioning rod 50 by a distance of the thickness of the preliminary blade blank until all the preliminary blade blanks are placed.

[0130] Step 613: Clamping the initial blade blank

[0131] By adjusting the top clamp 28, the clamping block 281 presses the multiple preliminary blade blanks on the side of the fixing plate 2 27 opposite to the fixing plate 1 26, and the pressing force is 0.1-1.0kN;

[0132] Step 614: Edge Forming

[0133] The four-axis CNC machining center spindle drives the initial blade blank to rotate, and the milling cutter on the tool holder is used to process the cutting edge to obtain the cutting edge blade blank;

[0134] Step 615, cutting

[0135] Adjust the pressing member 28 in the reverse direction to remove the cutting edge knife blank.

[0136] The second method: Figure 8 and Fig. 9 As shown, the upper surface of the movable plate 25 is provided with two slide grooves 251, and a mounting groove 252 is provided in the middle of the area between the two slide grooves 251. The slide groove 251 and the mounting groove 252 are located on the side of the movable plate 25 close to the fixed plate 26. A gear body 253 is rotatably installed in the mounting groove 252. Slide bars 254 are slidably matched in the two slide grooves 251. The opposite side of the two slide bars 254 is provided with tooth surfaces and meshes with the gear body 253. Positioning bars 256 are installed on the two slide bars 254, and the positioning bars 256 are attached to the upper surface of the movable plate 25. Compared with the first method, the complexity of the system can be reduced.

[0137] The cutting edge processing steps are as follows:

[0138] Step 621, tooling assembly

[0139] Connect the moving plate 25 to the T-shaped block 24 in the radial T-shaped groove 23 through long bolts, install the fixing plate 1 26 and the fixing plate 2 27 on the moving plate 25 through bolts, install the jacking piece 28 on the fixing plate 1 26, and install the mounting platform 21 on the flange through bolts;

[0140] Step 622, positioning the blade blank

[0141] Multiple blanks are stacked horizontally and placed on the movable plate 25 between the fixed plate 1 26 and the fixed plate 27, and the center of the blank and the center of the movable plate 25 are located in the same vertical plane by moving the positioning bar 253 close to the center of the movable plate 25, and ensuring that the bottom of the blank cannot be separated from the upper surface of the movable plate 25;

[0142] Step 623: Clamping the initial blade blank

[0143] By adjusting the top clamp 28, the clamping block 281 presses a plurality of preliminary blade blanks on the side of the fixing plate 2 27 opposite to the fixing plate 1 26, and the pressing force is 0.1-1.0 kN;

[0144] Step 624: Edge Forming

[0145] The four-axis CNC machining center spindle drives the initial blade blank to rotate, and the milling cutter on the tool holder is used to process the cutting edge to obtain the cutting edge blade blank;

[0146] Step 625, cutting

[0147] Adjust the pressing member 28 in the reverse direction to remove the cutting edge knife blank.

[0148] The third method: Figures 10 to 15 As shown, the movable plate 25 is provided with two symmetrically distributed movable blocks 2501 at the front and rear, the two movable blocks 2501 are respectively located at the two sides of the initial blade blank, a clamping claw 2502 is provided on the opposite side of the two movable blocks 2501, an ear shaft 1 2503 and an ear shaft 2 2504 are installed on the side of the clamping claw 2502, a guide groove 1 2505 corresponding to the position of the ear shaft 1 2503 and a guide groove 2 2506 corresponding to the position of the ear shaft 2 2504 are provided on the movable block 2501, and the guide groove 1 2505 and the guide groove 2 2506 are both vertically An arc groove is arranged on the top of the second guide groove 2506, and a tension spring 2507 is connected between the clamping claw 2502 and the moving block 2501. The two clamping claws 2502 respectively clamp the side walls from the front and back sides of the initial blade blank; a horizontal plate is arranged on the back of the moving block 2501, and a top screw is installed on the horizontal plate to press against the upper surface of the moving plate 25, and the bottom surface of the moving block 2501 is slidably matched with the moving plate 25 through a T-shaped guide bar and the moving plate 25 to adjust the distance between the two moving blocks 2501, so as to meet the processing operations of slotting cutters of different specifications.

[0149] The top of the clamping claw 2502 is provided with an elastic expansion body 2508, and the bottom is provided with a pressure body 2509; the side wall of the preliminary blade blank is provided with a connecting groove, and the connecting groove and the elastic expansion body 2508 correspond to each other and are adapted to each other. When in use, the slotting knife acts downward on the bottom of the pressure body 2509, and the clamping claw 2502 holds the connecting groove on the side of the preliminary blade blank toward the middle, and the preliminary blade blank is pressed downward on the upper surface of the moving plate 25.

[0150] The cutting edge processing steps are as follows:

[0151] Step 621, tooling assembly

[0152] The movable plate 25 is connected to the T-shaped block 24 in the radial T-shaped groove 23 by long bolts, the fixed plate 1 26 and the fixed plate 27 are installed on the movable plate 25 by bolts, and the screw rod 282 is installed on the fixed plate 1 26, one end of the screw rod 282 is adjusted to between the fixed plate 1 26 and the fixed plate 27, and a clamping block 281 is installed at the end by bolts to ensure that the clamping block 281 and the screw rod 282 rotate relative to each other, and the mounting platform 21 is installed on the flange by bolts;

[0153] Step 622, positioning the blade blank

[0154] Multiple blanks are stacked horizontally into a stack, and the stack is placed vertically downward on the movable plate 25 between the fixed plate 1 26 and the fixed plate 27. During the lowering process, the clamping claw 2502 automatically adjusts the stack to a position where the center of the blank and the center of the movable plate 25 are located in the same vertical plane, and the bottom of the stack is pressed against the movable plate 25 under the action of the tension spring 2507;

[0155] Step 623: Clamping the initial blade blank

[0156] By adjusting the top clamp 28, the clamping block 281 presses the plurality of preliminary blade blanks on the side of the fixing plate 2 27 opposite to the fixing plate 1 26, and the pressing force is 0.05-0.5 kN;

[0157] Step 624: Edge Forming

[0158] The four-axis CNC machining center spindle drives the initial blade blank to rotate, and the milling cutter on the tool holder is used to process the cutting edge to obtain the cutting edge blade blank;

[0159] Step 625, cutting

[0160] The pressing piece 28 is adjusted in the reverse direction to lift the cutting edge blank to overcome the tension of the tension spring 2507. After the pressing claw 2502 moves up to the highest point, the tension spring 2507 separates the pressing claw 2502 and the cutting edge blank, and the cutting edge blank can be removed.

[0161] Embodiment 3, in the fixture, as Figure 7, 8 As shown in 10 and 16, the said top clamp 28 also includes an anti-retraction part, an axial notch 2821 is provided on the screw 282, the anti-retraction part is sleeved on the outer side of the screw 282, the anti-retraction part includes a circumferential block 2822 and a clamping part 2823, the circumferential block 2822 and the axial notch 2821 are axially slidably matched, the clamping part 2823 is threadedly connected to the outer side of the screw 282, and a slot is provided on one side of the fixing plate 1 26 relative to the fixing plate 2 27, and the positions of the circumferential block 2822 correspond and are adapted and installed. After the clamping block 281 is pressed against the initial blade blank, the circumferential block 2822 and the slot are adapted, and the clamping part 2823 is pressed and locked, and when it is relaxed, the circumferential block 2822 and the slot are separated first, thereby effectively preventing the problem of loosening during operation.

[0162] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. The replacement may be a replacement of a part of the structure, device, method step, or a complete technical solution. Any equivalent replacement or change according to the technical solution and the inventive concept of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A carton slotting knife production process, characterized in that: include: Step 1: Cutting the slab Select a slab of suitable material and plan the blade shape distribution map in advance according to the size of the slab, import it into the laser cutting machine system, and complete the blade blank cutting by laser cutting to obtain the initial blade blank. The blade blank shape allowance is 1mm and the thickness allowance is 2mm; Step 2, Annealing The initial blade blank is sent to an annealing furnace for annealing treatment at a temperature of 780-880°C for 1-6 hours, cooled to 600-700°C in the annealing furnace, and cooled to room temperature by air out of the furnace to obtain an annealed blade blank; Step 3: Rough grinding of the surface Assemble the flattened blade blank on a grinder, and roughly grind the two side surfaces to obtain a roughly ground blade blank with a thickness allowance of 1 mm; Step 4: Shape processing A positioning block is installed on the side of the electromagnetic chuck of the CNC milling machine. A positioning substrate 1 and a positioning substrate 2 are placed on the electromagnetic chuck and abut against the corresponding positioning blocks. The positioning substrate 1 and the positioning substrate 2 are made of stainless steel or aluminum alloy. The flattened blade blank is placed flat on the electromagnetic chuck, and two adjacent side walls are attached to the positioning substrate 1 and the positioning substrate 2. The electromagnetic chuck is energized, and the positioning substrate 1 and the positioning substrate 2 are taken down. The contour of the flattened blade blank is milled to obtain the tool shape to obtain the initial blade blank. Step 5: Edge processing The fixture is mounted on the flange of the main shaft of the four-axis CNC machining center, and multiple pieces of preliminary tool blanks are stacked and vertically mounted on the fixture to ensure that the center of the preliminary tool blank coincides with the axis of the main shaft of the four-axis CNC machining center, and a tool edge is machined on the outer side of the tool blank to obtain a tool blank with an edge; Step 6: Quenching The blade blank is quenched and cooled to 200-300℃; Step 7: Flatten the knife blank Transfer to the press and flatten it; Step 8, Tempering The flattened blade blank is clamped between two clamping plates, and the two clamping plates are connected by screws to clamp the blade blank, and then sent into a box-type furnace for tempering treatment; Step 9, Finishing The surfaces of both sides of the tempered blade blank are semi-finely ground by a grinder, and the thickness allowance is 0.5mm; The surfaces on both sides of the blade blank are then finely ground by a circular table to a surface roughness of Ra0.6-Ra0.4μm and a thickness tolerance of ±0.002mm.

2. A carton slotting knife production process according to claim 1, characterized in that: The fixture includes a mounting platform, an extension body is arranged on the mounting platform, a radial T-shaped groove is arranged in the middle of the extension body, a T-shaped block is slidably fitted in the radial T-shaped groove, a movable plate is installed on the T-shaped block, the movable plate is arranged perpendicular to the mounting platform, a fixed plate one and a fixed plate two are installed on the movable plate, the fixed plate one and the fixed plate two are both vertically mounted on the movable plate, the fixed plate one and the fixed plate two are both arranged parallel to the mounting platform, the preliminary blade blank is installed between the fixed plate one and the fixed plate two, the fixed plate one is located on the side of the fixed plate two away from the mounting platform, a tightening piece is installed on the fixed plate one, the tightening piece is used to press on the side of the preliminary blade blank, a connecting block is slidably fitted in the radial T-shaped groove, a connecting piece is installed on the connecting block, and a supporting block pressed on the mounting platform is sleeved on the outer side of the connecting piece.

3. A carton slotting knife production process according to claim 2, characterized in that: The pressing member comprises a screw rod and a pressing block installed at the end of the screw rod. The pressing block is located between the first fixing plate and the second fixing plate and is rotatably installed with the end of the screw rod.

4. A carton slotting knife production process according to claim 2, characterized in that: The cutting edge processing steps are as follows: Step 611: Tooling assembly Connect the moving plate to the T-shaped block in the radial T-shaped groove through long bolts, install the fixed plate 1 and the fixed plate 2 on the moving plate through bolts, install the top fastener on the fixed plate 1, and install the mounting platform on the flange through bolts; Step 612, positioning the blade blank The positioning rod is taken out from the tool magazine and installed on the tool holder. The four-axis CNC machining center system controls the tool holder to move the positioning rod to the rear side of the preliminary blade blank to be installed. Multiple pieces of preliminary blade blanks are abutted against the positioning rod one by one and the bottom is attached to the moving plate. After each piece of preliminary blade blank is installed, the main axis moves away from the positioning rod by a distance of the thickness of the preliminary blade blank until all the preliminary blade blanks are placed. Step 613: Clamping the initial blade blank By adjusting the top clamp, the clamping block presses multiple preliminary blade blanks on the side of the fixed plate 2 relative to the fixed plate 1, and the clamping force is 0.1-1.0kN; Step 614: Edge Forming The four-axis CNC machining center spindle drives the initial blade blank to rotate, and the milling cutter on the tool holder is used to process the cutting edge to obtain the cutting edge blade blank; Step 615, cutting Adjust the clamping piece in reverse direction to remove the cutting edge blank.

5. A carton slotting knife production process according to claim 2, characterized in that: Two slide grooves are arranged on the upper surface of the movable plate, and an installation groove is arranged in the middle of the area between the two slide grooves. The slide groove and the installation groove are located on the side of the movable plate close to the fixed plate. A gear body is rotatably installed in the installation groove. Slide bars are slidably matched in the two slide grooves. Tooth surfaces are arranged on the opposite sides of the two slide bars and mesh with the gear body. Positioning bars are installed on the two slide bars, and the positioning bars are attached to the upper surface of the movable plate.

6. A carton slotting knife production process according to claim 5, characterized in that: The cutting edge processing steps are as follows: Step 621, tooling assembly Connect the moving plate to the T-shaped block in the radial T-shaped groove through long bolts, install the fixed plate 1 and the fixed plate 2 on the moving plate through bolts, install the top fastener on the fixed plate 1, and install the mounting platform on the flange through bolts; Step 622, positioning the blade blank A plurality of preliminary blade blanks are stacked horizontally and placed on a movable plate between a first fixed plate and a second fixed plate, and a positioning bar is moved close to the center of the movable plate so that the center of the preliminary blade blank and the center of the movable plate are located in the same vertical plane, and it is ensured that the bottom of the preliminary blade blank cannot be separated from the upper surface of the movable plate; Step 623: Clamping the initial blade blank By adjusting the top clamp, the clamping block presses multiple preliminary blade blanks on the side of the fixed plate 2 opposite to the fixed plate 1, and the clamping force is 0.1-1.0kN; Step 624: Edge Forming The four-axis CNC machining center spindle drives the initial blade blank to rotate, and the milling cutter on the tool holder is used to process the cutting edge to obtain the cutting edge blade blank; Step 625, cutting Adjust the clamping piece in reverse direction to remove the cutting edge blank.

7. A carton slotting knife production process according to claim 3, characterized in that: The clamping member also includes an anti-retraction member, an axial notch is provided on the screw, the anti-retraction member is sleeved on the outer side of the screw, the anti-retraction member includes a circumferential stopper and a clamping member, the circumferential stopper and the axial notch are axially slidably matched, the clamping member is threadedly connected to the outer side of the screw, and a slot is provided on one side of the fixing plate one relative to the fixing plate two, and the position of the slot and the circumferential stopper correspond and are adaptably installed.

8. A carton slotting knife production process according to claim 7, characterized in that: The movable plate is provided with two symmetrically distributed movable blocks at the front and rear, the two movable blocks are respectively located at the two sides of the preliminary blade blank, a clamping claw is arranged on the opposite side of the two movable blocks, an ear shaft 1 and an ear shaft 2 are arranged on the side of the clamping claw, a guide groove 1 corresponding to the position of the ear shaft 1 and a guide groove 2 corresponding to the position of the ear shaft 2 are arranged on the movable block, the guide groove 1 and the guide groove 2 are both vertically distributed and an arc groove is arranged on the top of the guide groove 2, a tension spring is connected between the clamping claw and the movable block, and the two clamping claws clamp the side wall from the front and rear sides of the preliminary blade blank respectively; An elastic telescopic body is arranged on the top of the pressing claw, and a pressure-bearing body is arranged on the bottom; The side wall of the preliminary blade blank is provided with a connecting groove, and the connecting groove and the elastic telescopic body are corresponding in position and adapted to each other.

9. A carton slotting knife production process according to claim 8, characterized in that: The cutting edge processing steps are as follows: Step 621, tooling assembly Connect the moving plate with the T-shaped block in the radial T-shaped groove through long bolts, install the fixed plate 1 and the fixed plate 2 on the moving plate through bolts, install a screw on the fixed plate 1, adjust one end of the screw to between the fixed plate 1 and the fixed plate 2, and install a clamping block at the end through bolts to ensure that the clamping block and the screw rotate relative to each other, and install the mounting platform on the flange through bolts; Step 622, positioning the blade blank Multiple blanks are stacked horizontally into a stack, and the stack is placed vertically downward on the movable plate between the first fixed plate and the second fixed plate. During the lowering process, the pressing claws automatically adjust the position of the stack so that the center of the blank and the center of the movable plate are located in the same vertical plane, and the bottom of the stack is pressed against the movable plate under the action of the tension spring; Step 623: Clamping the initial blade blank By adjusting the top clamp, the clamping block presses multiple preliminary blade blanks on the side of the fixed plate 2 opposite to the fixed plate 1, and the clamping force is 0.05-0.5kN; Step 624: Edge Forming The four-axis CNC machining center spindle drives the initial blade blank to rotate, and the milling cutter on the tool holder is used to process the cutting edge to obtain the cutting edge blade blank; Step 625, cutting Adjust the clamping piece in the reverse direction to lift the cutting edge blank to overcome the tension of the tension spring. After the clamping claw moves to the highest point, the tension spring separates the clamping claw and the cutting edge blank, and the cutting edge blank can be removed.

10. A carton slotting knife production process according to claim 1, characterized in that: When the slab material is Cr12MoV steel plate; Annealing temperature is 840-880℃, keep warm for 4-6h, cool to 600-650℃ with the furnace, and air cool out of the furnace; Quenching temperature is 1020-1060℃, keep warm for 10-20min, and air cool after leaving the furnace; The tempering temperature for both times is 180-230℃, kept at temperature for 10-20h, and then air-cooled after being taken out of the furnace; Or when the slab material is 9CrSi steel plate; Annealing temperature is 750-800℃, keep warm for 1-2h, cool to 600-700℃ with the furnace, and air cool out of the furnace; Quenching temperature 850-900℃, keep warm for 10-20min, oil-cool out of the furnace; The first tempering temperature is 300-350℃, keep warm for 3-5h, the second tempering temperature is 260-300℃, keep warm for 5-6h, and then air cool after leaving the furnace; And before finishing, remove the decarburized layer on the surface to make it bright.

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